JP2007071475A - Triple-effect absorption refrigerating machine - Google Patents

Triple-effect absorption refrigerating machine Download PDF

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JP2007071475A
JP2007071475A JP2005260647A JP2005260647A JP2007071475A JP 2007071475 A JP2007071475 A JP 2007071475A JP 2005260647 A JP2005260647 A JP 2005260647A JP 2005260647 A JP2005260647 A JP 2005260647A JP 2007071475 A JP2007071475 A JP 2007071475A
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temperature
solution
regenerator
temperature regenerator
refrigerant
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Tomoyoshi Irie
智芳 入江
Yoshiro Takemura
與四郎 竹村
Jun Murata
純 村田
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Ebara Refrigeration Equipment and Systems Co Ltd
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Ebara Refrigeration Equipment and Systems Co Ltd
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Priority to CNB2006101291048A priority patent/CN100549562C/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62—Absorption based systems

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Abstract

<P>PROBLEM TO BE SOLVED: To triple-effect absorption refrigerating machine capable of suppressing energy loss. <P>SOLUTION: The triple-effect absorption refrigerating machine 1 comprises an absorber A for changing solution S into diluted solution Sw having lower concentration, a low temperature regenerator G1 for heating the diluted solution Sw to evaporate refrigerant and increase the concentration, a medium temperature regenerator G2 for heating the diluted solution Sw to evaporate the refrigerant at a higher temperature than that in the low temperature regenerator G1 and increase the concentration, a high temperature regenerator G3 for heating the introduced diluted solution Sw to evaporate the refrigerant at a higher temperature than that in the medium temperature regenerator G2 and increase the concentration, a medium temperature solution pump 12 for feeding the diluted solution Sw from the absorber A into the medium temperature regenerator G2, and a high temperature solution pump 13 for feeding the diluted solution Sw from the absorber A into the high temperature regenerator G3. The proper amount of diluted solution is stably supplied to the high temperature regenerator and the medium temperature regenerator without providing a resistor at the entrance of the medium temperature regenerator, thus suppressing energy loss. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は三重効用吸収冷凍機に関し、特にエネルギーロスを抑制すると共に、各再生器への溶液の安定供給が可能となる三重効用吸収冷凍機に関するものである。   The present invention relates to a triple effect absorption refrigerator, and more particularly to a triple effect absorption refrigerator that suppresses energy loss and enables stable supply of a solution to each regenerator.

近年、地球環境保全意識が高まる一方でエネルギー消費の著しい増加が環境に及ぼす影響が懸念されている。いわゆる京都議定書の発効が確定した今日においては、各国に定められた温室効果ガスの削減目標を達成するため、さらなる省エネルギーの推進を図ることが喫緊の課題となっている。そのような中、業務用を中心に事務所やビル等で幅広く採用される吸収冷凍機として、より省エネルギー性の高い三重効用吸収冷凍機の普及が期待されている。   In recent years, there has been concern about the impact of a significant increase in energy consumption on the environment while increasing awareness of global environmental conservation. Today, when the so-called Kyoto Protocol comes into effect, it is an urgent task to promote further energy conservation in order to achieve the greenhouse gas reduction targets set in each country. Under such circumstances, triple-effect absorption refrigerators with higher energy savings are expected to be widely used as absorption refrigerators widely used in offices and buildings mainly for commercial use.

三重効用吸収冷凍機は、吸収冷凍機において、吸収器で冷媒を吸収した希溶液から最も高い温度で冷媒を蒸発させる高温再生器と、高温再生器よりも低い温度で希溶液から冷媒を蒸発させる中温再生器と、中温再生器よりも低い温度で希溶液から冷媒を蒸発させる低温再生器との３つの再生器を有し、高温再生器で蒸発した冷媒蒸気を中温再生器に導いてこの冷媒蒸気の熱で希溶液から冷媒を蒸発させ、中温再生器で蒸発した冷媒蒸気を低温再生器に導いてこの冷媒蒸気の熱で希溶液から冷媒を蒸発させることにより、再生器に投入する熱量（又は熱を発生させるための燃料）を削減して省エネルギーを図っている。従来、三重効用吸収冷凍機は、吸収器で冷媒を吸収した希溶液を、１台のポンプで高温再生器、中温再生器、低温再生器の各再生器に送液しているものが多かった（例えば特許文献１参照）。
特開２０００−１７１２３号公報（図１等） The triple effect absorption refrigerator is a high-temperature regenerator that evaporates the refrigerant at the highest temperature from the dilute solution that has absorbed the refrigerant by the absorber, and a refrigerant that evaporates from the dilute solution at a temperature lower than that of the high-temperature regenerator. There are three regenerators, an intermediate temperature regenerator and a low temperature regenerator that evaporates the refrigerant from the dilute solution at a temperature lower than that of the intermediate temperature regenerator, and the refrigerant vapor evaporated in the high temperature regenerator is led to the intermediate temperature regenerator and this refrigerant The amount of heat input to the regenerator by evaporating the refrigerant from the dilute solution with the heat of the vapor, introducing the refrigerant vapor evaporated in the medium temperature regenerator to the low temperature regenerator, and evaporating the refrigerant from the dilute solution with the heat of the refrigerant vapor ( (Or fuel for generating heat) is reduced to save energy. Conventionally, triple-effect absorption refrigerators often use a single pump to feed a dilute solution that has absorbed refrigerant into a high-temperature regenerator, a medium-temperature regenerator, and a low-temperature regenerator. (For example, refer to Patent Document 1).
Japanese Unexamined Patent Publication No. 2000-17123 (FIG. 1 etc.)

しかしながら、１台のポンプで３つの各再生器に送液すると、高揚程で大流量のポンプが必要となる。また、最も圧力が高い高温再生器の内圧でポンプの必要揚程を決定するため、中温再生器及び低温再生器への希溶液の流入量を調節するためにこれら２つの再生器の入口に高温再生器とそれぞれの再生器との圧力差に相当する圧力損失を有する部材（弁等）を設ける必要があり、これがエネルギーロスとなっていた。また、高温再生器の内圧の変動に応じてポンプの回転速度を調節すると、中温再生器及び低温再生器への希溶液の安定した供給を行うために、各再生器の入口側もしくは出口側に制御バルブを設ける必要がある。   However, if liquid is sent to each of the three regenerators with one pump, a pump with a high head and a large flow rate is required. In addition, in order to determine the required head of the pump with the internal pressure of the hot regenerator with the highest pressure, high temperature regeneration is performed at the inlets of these two regenerators in order to adjust the amount of dilute solution flowing into the medium temperature regenerator and the low temperature regenerator It is necessary to provide a member (valve or the like) having a pressure loss corresponding to the pressure difference between the regenerator and each regenerator, which is an energy loss. In addition, if the rotational speed of the pump is adjusted according to the fluctuation of the internal pressure of the high temperature regenerator, in order to stably supply the dilute solution to the medium temperature regenerator and the low temperature regenerator, the inlet side or the outlet side of each regenerator It is necessary to provide a control valve.

本発明は上述の課題に鑑み、エネルギーロスを抑制すると共に、各再生器への溶液の安定供給が可能となる三重効用吸収冷凍機を提供することを目的とする。   In view of the above-described problems, an object of the present invention is to provide a triple effect absorption refrigerator capable of suppressing energy loss and stably supplying a solution to each regenerator.

上記目的を達成するために、請求項１に記載の発明に係る三重効用吸収冷凍機は、例えば図１に示すように、冷媒蒸気Ｖｓを溶液Ｓで吸収し、溶液Ｓを濃度が低下した希溶液Ｓｗとする吸収器Ａと；吸収器Ａから希溶液Ｓｗを導入し、希溶液Ｓｗを加熱することにより冷媒を蒸発させて濃度を上昇させる低温再生器Ｇ１と；吸収器Ａから希溶液Ｓｗを導入し、希溶液Ｓｗを加熱することにより低温再生器Ｇ１におけるよりも高い温度で冷媒を蒸発させて濃度を上昇させる中温再生器Ｇ２と；吸収器Ａから希溶液Ｓｗを導入し、希溶液Ｓｗを加熱することにより中温再生器Ｇ２におけるよりも高い温度で冷媒を蒸発させて濃度を上昇させる高温再生器Ｇ３と；吸収器Ａから希溶液Ｓｗを中温再生器Ｇ２に送液する中温溶液ポンプ１２と；吸収器Ａから希溶液Ｓｗを高温再生器Ｇ３に送液する、中温溶液ポンプ１２とは別の高温溶液ポンプ１３とを備える。   In order to achieve the above object, a triple effect absorption refrigerator according to the invention described in claim 1 absorbs refrigerant vapor Vs with a solution S, for example, as shown in FIG. An absorber A as a solution Sw; a low temperature regenerator G1 that evaporates the refrigerant by introducing the dilute solution Sw from the absorber A and heating the dilute solution Sw; and the dilute solution Sw from the absorber A A medium temperature regenerator G2 that evaporates the refrigerant at a higher temperature than in the low temperature regenerator G1 by heating the dilute solution Sw; and the dilute solution Sw is introduced from the absorber A; A high temperature regenerator G3 that evaporates the refrigerant at a higher temperature than that in the intermediate temperature regenerator G2 by heating Sw; and a high temperature regenerator G3 that feeds the dilute solution Sw from the absorber A to the intermediate temperature regenerator G2. 12; Absorber Feeding a dilute solution Sw to the high temperature regenerator G3 from and a separate hot solution pump 13 and the medium-temperature solution pump 12.

このように構成すると、希溶液を、中温再生器に送液する中温溶液ポンプと、高温再生器に送液する高温溶液ポンプとを備えるので、中温再生器の入口に大きな抵抗を設けることなく高温再生器及び中温再生器に適切な量の希溶液を安定的に供給することができ、エネルギーロスを抑制することができる。また、中温再生器と低温再生器とが並列に配置され、中温溶液ポンプが低温再生器にも希溶液を送液する場合は、低温再生器の入口に大きな抵抗を設けることなく高温再生器、中温再生器及び低温再生器に適切な量の希溶液を安定的に供給することができ、エネルギーロスを抑制することができる。   If comprised in this way, since it is equipped with the intermediate temperature solution pump which sends a dilute solution to an intermediate temperature regenerator, and the high temperature solution pump which sends liquid to a high temperature regenerator, it is high temperature without providing big resistance at the inlet of an intermediate temperature regenerator. An appropriate amount of dilute solution can be stably supplied to the regenerator and the intermediate temperature regenerator, and energy loss can be suppressed. Further, when the intermediate temperature regenerator and the low temperature regenerator are arranged in parallel, and the intermediate temperature solution pump also sends the dilute solution to the low temperature regenerator, the high temperature regenerator without providing a large resistance at the inlet of the low temperature regenerator, An appropriate amount of dilute solution can be stably supplied to the medium temperature regenerator and the low temperature regenerator, and energy loss can be suppressed.

また、請求項２に記載の発明に係る三重効用吸収冷凍機は、例えば図１に示すように、請求項１に記載の三重効用吸収冷凍機において、高温再生器Ｇ３が、希溶液Ｓｗから冷媒を蒸発させて濃度が上昇した高温濃溶液Ｓｈ３を導出する側に、高温濃溶液Ｓｈ３を溜める高温再生器溶液溜まり２３を有し；中温再生器Ｇ２が、希溶液Ｓｗから冷媒を蒸発させて濃度が上昇した中温濃溶液Ｓｈ２を導出する側に、中温濃溶液Ｓｈ２を溜める中温再生器溶液溜まり２２を有し；高温再生器溶液溜まり２３内もしくは高温再生器Ｇ３の本体内の高温濃溶液Ｓｈ３の液面が第１の所定の液面高さになるように高温溶液ポンプ１３の吐出量を調節すると共に、中温再生器溶液溜まり２２内もしくは中温再生器Ｇ２の本体内の中温濃溶液Ｓｈ２が第２の所定の液面高さになるように中温溶液ポンプ１２の吐出量を調節する制御装置６０を備える。ここで、高温再生器Ｇ３の本体とは、典型的には、高温再生器溶液溜まり２３とは別の、高温再生器Ｇ３の主要部である。また、中温再生器Ｇ２の本体とは、典型的には、中温再生器溶液溜まり２２とは別の、中温再生器Ｇ２の主要部である。   Moreover, the triple effect absorption refrigerator according to the invention described in claim 2 is the triple effect absorption refrigerator according to claim 1, wherein the high temperature regenerator G3 is a refrigerant from the dilute solution Sw as shown in FIG. The high-temperature regenerator solution reservoir 23 for accumulating the high-temperature concentrated solution Sh3 is provided on the side of deriving the high-temperature concentrated solution Sh3 whose concentration has been increased by evaporating the refrigerant; the intermediate-temperature regenerator G2 evaporates the refrigerant from the dilute solution Sw and has a concentration The intermediate temperature regenerator solution reservoir 22 for accumulating the intermediate temperature concentrated solution Sh2 is provided on the side from which the intermediate temperature concentrated solution Sh2 is raised; the high temperature concentrated solution Sh3 in the high temperature regenerator solution reservoir 23 or in the main body of the high temperature regenerator G3. The discharge amount of the high temperature solution pump 13 is adjusted so that the liquid level becomes the first predetermined liquid level, and the medium temperature concentrated solution Sh2 in the intermediate temperature regenerator solution reservoir 22 or the main body of the intermediate temperature regenerator G2 2 predetermined And a control unit 60 for adjusting the discharge amount of the medium-temperature solution pump 12 so that the liquid level. Here, the main body of the high temperature regenerator G3 is typically the main part of the high temperature regenerator G3, which is different from the high temperature regenerator solution reservoir 23. The main body of the intermediate temperature regenerator G2 is typically the main part of the intermediate temperature regenerator G2, which is different from the medium temperature regenerator solution reservoir 22.

このように構成すると、高温再生器溶液溜まり内もしくは高温再生器の本体内の高温濃溶液の液面が第１の所定の液面高さになるように高温溶液ポンプの吐出量を調節すると共に、中温再生器溶液溜まり内もしくは中温再生器の本体内の中温濃溶液が第２の所定の液面高さになるように中温溶液ポンプの吐出量を調節するので、高温再生器内の高温濃溶液及び中温再生器内の中温濃溶液が、各再生器で蒸発した冷媒に混じって排出されることがない。   With this configuration, the discharge amount of the high-temperature solution pump is adjusted so that the liquid level of the high-temperature concentrated solution in the high-temperature regenerator solution reservoir or the main body of the high-temperature regenerator becomes the first predetermined liquid level. Since the discharge amount of the intermediate temperature solution pump is adjusted so that the intermediate temperature concentrated solution in the intermediate temperature regenerator solution reservoir or the main body of the intermediate temperature regenerator has the second predetermined liquid level, the high temperature concentration in the high temperature regenerator is adjusted. The solution and the medium-temperature concentrated solution in the medium-temperature regenerator are not discharged together with the refrigerant evaporated in each regenerator.

また、請求項３に記載の発明に係る三重効用吸収冷凍機は、例えば図１に示すように、請求項２に記載の三重効用吸収冷凍機において、高温再生器Ｇ３内の圧力を検知する高温圧力検知器６３と；高温再生器溶液溜まり２３内もしくは高温再生器Ｇ３の本体内の高温濃溶液Ｓｈ３の高位液面及び低位液面を検知する高温液面検知器６６と；中温再生器２２内の圧力を検知する中温圧力検知器６２と；中温再生器溶液溜まり２２内もしくは中温再生器Ｇ２の本体内の中温濃溶液Ｓｈ２の高位液面及び低位液面を検知する中温液面検知器６５とを備え；制御装置６０が、高温溶液ポンプ１３の回転速度を、高温圧力検知器６３で検知した圧力に基づいて調節しつつ高温液面検知器６６が高位液面を検知したときに低下させ低位液面を検知したときに上昇させると共に、中温溶液ポンプ１２の回転速度を、中温圧力検知器６２で検知した圧力に基づいて調節しつつ中温液面検知器６５が高位液面を検知したときに低下させ低位液面を検知したときに上昇させるように構成されている。   Moreover, the triple effect absorption refrigerator which concerns on invention of Claim 3 is a high temperature which detects the pressure in the high temperature regenerator G3 in the triple effect absorption refrigerator as described in Claim 2, for example, as shown in FIG. A pressure detector 63; a high temperature liquid level detector 66 for detecting the high and low liquid levels of the hot concentrated solution Sh3 in the high temperature regenerator solution reservoir 23 or the main body of the high temperature regenerator G3; A medium temperature pressure detector 62 for detecting the pressure of the medium; a medium temperature liquid level detector 65 for detecting the high and low liquid levels of the medium temperature concentrated solution Sh2 in the medium temperature regenerator solution reservoir 22 or in the main body of the medium temperature regenerator G2; The control device 60 adjusts the rotational speed of the high-temperature solution pump 13 based on the pressure detected by the high-temperature pressure detector 63, and lowers it when the high-temperature liquid level detector 66 detects a high level liquid level. When the liquid level is detected While increasing, the rotational speed of the medium-temperature solution pump 12 is adjusted based on the pressure detected by the medium-temperature pressure detector 62, and when the medium-temperature liquid level detector 65 detects a high liquid level, the low-level liquid level is detected. It is configured to raise when you do.

このように構成すると、高温再生器及び中温再生器おいて、各再生器内の圧力を基準として対応する溶液ポンプの回転速度を調節して、各再生器の溶液溜まりもしくは各再生器の本体内の液面によって対応する溶液ポンプの回転速度を補正するので、各再生器内の溶液液面の安定性が増す。   With this configuration, in the high-temperature regenerator and the medium-temperature regenerator, the rotation speed of the corresponding solution pump is adjusted with reference to the pressure in each regenerator, so that the solution reservoir of each regenerator or the main body of each regenerator Since the rotation speed of the corresponding solution pump is corrected by the liquid level, the stability of the solution liquid level in each regenerator is increased.

また、請求項４に記載の発明に係る三重効用吸収冷凍機は、例えば図２に示すように、請求項３に記載の三重効用吸収冷凍機において、高温圧力検知器６３（例えば図１参照）に代えて、高温再生器Ｇ３内の希溶液Ｓｗを加熱して蒸発した冷媒が凝縮した高温凝縮冷媒Ｖｆ３の温度を検知する高温冷媒温度検知器６９を備え；中温圧力検知器６２（例えば図１参照）に代えて、中温再生器Ｇ２内の希溶液Ｓｗを加熱して蒸発した冷媒が凝縮した中温凝縮冷媒Ｖｆ２の温度を検知する中温冷媒温度検知器６８を備え；制御装置６０が、高温圧力検知器６３（例えば図１参照）で検知した圧力に代えて高温冷媒温度検知器６９で検知した温度に基づいて高温溶液ポンプ１３の回転速度を調節し、中温圧力検知器６２（例えば図１参照）で検知した圧力に代えて中温冷媒温度検知器６８で検知した温度に基づいて中温溶液ポンプ１２の回転速度を調節するように構成されている。   Further, the triple effect absorption refrigerator according to the invention described in claim 4 is the triple effect absorption refrigerator according to claim 3, for example, as shown in FIG. 2, and the high temperature pressure detector 63 (see, for example, FIG. 1). Instead of this, a high-temperature refrigerant temperature detector 69 that detects the temperature of the high-temperature condensed refrigerant Vf3 in which the refrigerant evaporated by heating the diluted solution Sw in the high-temperature regenerator G3 is condensed; Instead of the above, a medium temperature refrigerant temperature detector 68 for detecting the temperature of the medium temperature condensed refrigerant Vf2 in which the refrigerant evaporated by heating the dilute solution Sw in the medium temperature regenerator G2 is condensed is provided; Instead of the pressure detected by the detector 63 (for example, see FIG. 1), the rotational speed of the high-temperature solution pump 13 is adjusted based on the temperature detected by the high-temperature refrigerant temperature detector 69, and the medium temperature pressure detector 62 (for example, see FIG. 1). ) Is configured to adjust the rotational speed of the medium temperature solution pump 12 based on the temperature detected by the medium-temperature refrigerant temperature detector 68 instead of the force.

このように構成すると、高温再生器及び中温再生器内の圧力と相関関係を有する高温凝縮冷媒及び中温凝縮冷媒の温度を基準として対応する溶液ポンプの回転速度を調節し、各再生器の溶液溜まりの液面によって対応する溶液ポンプの回転速度を補正するので、各再生器内の溶液液面の安定性が増す。   With this configuration, the rotational speeds of the corresponding solution pumps are adjusted based on the temperatures of the high-temperature condensing refrigerant and the intermediate-temperature condensing refrigerant that have a correlation with the pressure in the high-temperature regenerator and the intermediate-temperature regenerator, and the solution reservoirs of each regenerator are adjusted. Since the rotation speed of the corresponding solution pump is corrected by the liquid level, the stability of the solution liquid level in each regenerator is increased.

本発明に係る三重効用吸収冷凍機によれば、希溶液を、中温再生器に送液する中温溶液ポンプと、高温再生器に送液する高温溶液ポンプとを備えるので、中温再生器の入口に大きな抵抗を設けることなく高温再生器及び中温再生器に適切な量の希溶液を安定的に供給することができ、エネルギーロスを抑制することができる。また、中温再生器と低温再生器とが並列に配置され、中温溶液ポンプが低温再生器にも希溶液を送液する場合は、低温再生器の入口に大きな抵抗を設けることなく高温再生器、中温再生器及び低温再生器に適切な量の希溶液を安定的に供給することができ、エネルギーロスを抑制することができる。   According to the triple effect absorption refrigerator according to the present invention, since it includes a medium temperature solution pump for feeding a dilute solution to a medium temperature regenerator and a high temperature solution pump for feeding a high temperature regenerator, the inlet of the medium temperature regenerator is provided. An appropriate amount of dilute solution can be stably supplied to the high temperature regenerator and the medium temperature regenerator without providing a large resistance, and energy loss can be suppressed. Further, when the intermediate temperature regenerator and the low temperature regenerator are arranged in parallel, and the intermediate temperature solution pump also sends the dilute solution to the low temperature regenerator, the high temperature regenerator without providing a large resistance at the inlet of the low temperature regenerator, An appropriate amount of dilute solution can be stably supplied to the medium temperature regenerator and the low temperature regenerator, and energy loss can be suppressed.

以下、図面を参照して、本発明の実施の形態について説明する。なお、各図において、互いに同一又は相当する装置には同一あるいは類似の符号を付し、重複した説明は省略する。なお、図１、２、３、４（ａ）中、破線は制御信号を表す。
まず図１を参照して、本発明の実施の形態に係る三重効用吸収冷凍機１（以下単に「吸収冷凍機１」という。）の構成について説明する。図１は、本発明の実施の形態に係る吸収冷凍機１を示す模式的系統図である。吸収冷凍機１は、吸収器Ａと、低温再生器Ｇ１と、中温再生器Ｇ２と、高温再生器Ｇ３と、凝縮器Ｃと、蒸発器Ｅと、中温溶液ポンプ１２と、高温溶液ポンプ１３と、低温溶液熱交換器３１と、中温溶液熱交換器３２と、高温溶液熱交換器３３と、制御装置６０とを備えている。 Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same or corresponding devices are denoted by the same or similar reference numerals, and redundant description is omitted. In FIGS. 1, 2, 3, 4 (a), a broken line represents a control signal.
First, the configuration of a triple effect absorption refrigerator 1 (hereinafter simply referred to as “absorption refrigerator 1”) according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic system diagram showing an absorption refrigerator 1 according to an embodiment of the present invention. The absorption refrigerator 1 includes an absorber A, a low temperature regenerator G1, an intermediate temperature regenerator G2, a high temperature regenerator G3, a condenser C, an evaporator E, an intermediate temperature solution pump 12, and a high temperature solution pump 13. The low-temperature solution heat exchanger 31, the intermediate-temperature solution heat exchanger 32, the high-temperature solution heat exchanger 33, and the control device 60 are provided.

吸収器Ａは、蒸発器Ｅで発生した冷媒蒸気Ｖｓを溶液Ｓに吸収させる装置である。典型的には、冷媒として水が、溶液Ｓとして臭化リチウム（ＬｉＢｒ）が用いられるが、これに限らず他の冷媒、溶液（吸収剤）の組み合わせで使用してもよい。吸収器Ａには、溶液Ｓが冷媒蒸気Ｖｓを吸収したとき発生する吸収熱を奪う冷却水ｑを流すための冷却水管７１が内部に配設されている。また、吸収器Ａには、各再生器Ｇ１〜Ｇ３で再生され、濃度が高くなった溶液Ｓを散布する濃溶液散布ノズル７２が冷却水管７１の上方に配設されている。吸収器Ａは、その下部が、冷媒蒸気Ｖｓを吸収して濃度が低下した希溶液Ｓｗを貯留する貯留部７３となっている。貯留部７３には、希溶液Ｓｗを低温再生器Ｇ１及び中温再生器Ｇ２に向けて導出する希溶液導出管４２と、希溶液Ｓｗを高温再生器Ｇ３に向けて導出する希溶液導出管４３とが接続されている。吸収器Ａは蒸発器Ｅと上部で連通しており、蒸発器Ｅで蒸発した冷媒蒸気Ｖｓを吸収器Ａに導入することができるように構成されている。   The absorber A is a device that causes the solution S to absorb the refrigerant vapor Vs generated in the evaporator E. Typically, water is used as the refrigerant and lithium bromide (LiBr) is used as the solution S. However, the present invention is not limited to this, and other refrigerants and solutions (absorbents) may be used in combination. The absorber A is provided with a cooling water pipe 71 for flowing cooling water q that takes away the heat of absorption generated when the solution S absorbs the refrigerant vapor Vs. Further, in the absorber A, a concentrated solution spraying nozzle 72 that sprays the solution S having a high concentration regenerated by the regenerators G1 to G3 is disposed above the cooling water pipe 71. The lower part of the absorber A is a storage unit 73 that stores the diluted solution Sw having a reduced concentration by absorbing the refrigerant vapor Vs. The storage unit 73 includes a dilute solution outlet tube 42 for deriving the dilute solution Sw toward the low temperature regenerator G1 and the intermediate temperature regenerator G2, and a dilute solution outlet tube 43 for deriving the dilute solution Sw toward the high temperature regenerator G3. Is connected. The absorber A communicates with the evaporator E at the top, and is configured so that the refrigerant vapor Vs evaporated by the evaporator E can be introduced into the absorber A.

低温再生器Ｇ１は、吸収器Ａから希溶液Ｓｗを導入し、希溶液Ｓｗを加熱することにより冷媒を蒸発させて濃度を上昇させる装置である。低温再生器Ｇ１内の上部には、導入した希溶液Ｓｗを散布する希溶液散布ノズル５１ａが配設されている。また、低温再生器Ｇ１には、希溶液Ｓｗを加熱する加熱源としての冷媒蒸気Ｖｍを流すための加熱用蒸気管５１が希溶液散布ノズル５１ａの下方に配設されている。この、加熱用蒸気管５１が配設される部分を、低温再生器Ｇ１の本体ということとする。加熱用蒸気管５１には、中温再生器Ｇ２で蒸発した中温冷媒蒸気Ｖｓ２と、高温再生器Ｇ３で蒸発した高温冷媒蒸気Ｖｓ３が中温再生器Ｇ２で凝縮した高温凝縮冷媒Ｖｆ３とが混合した冷媒蒸気Ｖｍが導入される。低温再生器Ｇ１は凝縮器Ｃと上部で連通しており、冷媒蒸気Ｖｍの熱で希溶液Ｓｗから蒸発した低温冷媒蒸気Ｖｓ１が凝縮器Ｃに移動することができるように構成されている。   The low temperature regenerator G1 is a device that introduces the dilute solution Sw from the absorber A and heats the dilute solution Sw to evaporate the refrigerant to increase the concentration. A dilute solution spray nozzle 51a for spraying the introduced dilute solution Sw is disposed in the upper part of the low temperature regenerator G1. The low temperature regenerator G1 is provided with a heating steam pipe 51 for flowing a refrigerant vapor Vm as a heating source for heating the diluted solution Sw below the diluted solution spray nozzle 51a. The portion where the heating steam pipe 51 is disposed is referred to as a main body of the low temperature regenerator G1. In the heating steam pipe 51, a refrigerant vapor in which a medium temperature refrigerant vapor Vs2 evaporated in the medium temperature regenerator G2 and a high temperature condensed refrigerant Vf3 in which the high temperature refrigerant vapor Vs3 evaporated in the high temperature regenerator G3 is condensed in the medium temperature regenerator G2 are mixed. Vm is introduced. The low-temperature regenerator G1 communicates with the condenser C at the top, and is configured such that the low-temperature refrigerant vapor Vs1 evaporated from the dilute solution Sw by the heat of the refrigerant vapor Vm can move to the condenser C.

また、低温再生器Ｇ１の下部には、希溶液Ｓｗ中から冷媒が蒸発して濃度が上昇した低温濃溶液Ｓｈ１を溜める低温再生器溶液溜まり２１が設けられている。低温再生器溶液溜まり２１は、典型的には、低温再生器Ｇ１の下部に低温再生器Ｇ１と一体となって形成されているが、例えば所定の容積を有するタンクを低温再生器Ｇ１から物理的に離して配管で接続して形成されていても低温再生器Ｇ１の一部であるものとする。また、低温再生器溶液溜まり２１は、タンクのような形状ではなく、配管であってもよい。低温再生器溶液溜まり２１が低温再生器Ｇ１と一体となっている場合は、低温再生器Ｇ１の本体が低温再生器溶液溜まり２１を兼ねることがある。低温再生器溶液溜まり２１には、低温濃溶液Ｓｈ１を導出する低温濃溶液導出管４４が接続されている。低温濃溶液導出管４４は、低温溶液熱交換器３１を介した後に高温濃溶液導出管４６と合流し、吸収器Ａの濃溶液散布ノズル７２に接続されている。   In addition, a low temperature regenerator solution reservoir 21 is provided below the low temperature regenerator G1. The low temperature regenerator solution reservoir 21 stores a low temperature concentrated solution Sh1 whose concentration has increased due to evaporation of refrigerant from the dilute solution Sw. The low-temperature regenerator solution reservoir 21 is typically formed integrally with the low-temperature regenerator G1 below the low-temperature regenerator G1, but for example, a tank having a predetermined volume is physically formed from the low-temperature regenerator G1. It is assumed that it is a part of the low-temperature regenerator G1 even if it is formed by being connected by piping. Further, the low temperature regenerator solution reservoir 21 may not be a tank shape but may be a pipe. When the low-temperature regenerator solution reservoir 21 is integrated with the low-temperature regenerator G1, the main body of the low-temperature regenerator G1 may also serve as the low-temperature regenerator solution reservoir 21. The low temperature regenerator solution reservoir 21 is connected to a low temperature concentrated solution outlet pipe 44 for extracting the low temperature concentrated solution Sh1. The low-temperature concentrated solution outlet pipe 44 passes through the low-temperature solution heat exchanger 31 and then merges with the high-temperature concentrated solution outlet pipe 46 and is connected to the concentrated solution spray nozzle 72 of the absorber A.

中温再生器Ｇ２は、吸収器Ａから希溶液Ｓｗを導入し、希溶液Ｓｗを加熱することにより低温再生器Ｇ１におけるよりも高い温度で冷媒を蒸発させて濃度を上昇させる装置である。中温再生器Ｇ２内の上部には、導入した希溶液Ｓｗを散布する希溶液散布ノズル５２ａが配設されている。また、中温再生器Ｇ２には、希溶液Ｓｗを加熱する加熱源としての冷媒蒸気Ｖｓ３を流すための加熱用蒸気管５２が希溶液散布ノズル５２ａの下方に配設されている。この、加熱用蒸気管５２が配設される部分を、中温再生器Ｇ２の本体ということとする。加熱用蒸気管５２には、高温再生器Ｇ３で蒸発した高温冷媒蒸気Ｖｓ３が導入される。加熱用蒸気管５２には、希溶液Ｓｗに熱を奪われた高温冷媒蒸気Ｖｓ３が凝縮した高温凝縮冷媒Ｖｆ３を流す高温凝縮冷媒管５６が接続されている。また、中温再生器Ｇ２の上部には、高温冷媒蒸気Ｖｓ３の熱で希溶液Ｓｗから蒸発した中温冷媒蒸気Ｖｓ２を導出する中温冷媒蒸気管５５が接続されている。中温冷媒蒸気管５５は、低温再生器Ｇ１の加熱用蒸気管５１に接続されている。また、中温冷媒蒸気管５５には、途中で高温凝縮冷媒管５６が接続されている。中温再生器Ｇ２には、中温再生器Ｇ２内の圧力を検知する圧力検知器としての圧力センサー６２が設けられている。圧力センサー６２は、中温再生器Ｇ２内の圧力を検知することができればよいので、中温再生器Ｇ２近傍の中温冷媒蒸気管５５に設けられていてもよい。圧力センサー６２は、信号ケーブルで制御装置６０と接続されており、圧力センサー６２で検知した圧力信号を制御装置６０に送信することができるように構成されている。   The intermediate temperature regenerator G2 is a device that evaporates the refrigerant at a temperature higher than that in the low temperature regenerator G1 by introducing the dilute solution Sw from the absorber A and heating the dilute solution Sw, thereby increasing the concentration. A dilute solution spray nozzle 52a for spraying the introduced dilute solution Sw is disposed in the upper part of the intermediate temperature regenerator G2. The intermediate temperature regenerator G2 is provided with a heating steam pipe 52 for flowing a refrigerant vapor Vs3 as a heating source for heating the diluted solution Sw below the diluted solution spray nozzle 52a. The portion where the heating steam pipe 52 is disposed is referred to as a main body of the intermediate temperature regenerator G2. The high-temperature refrigerant vapor Vs3 evaporated by the high-temperature regenerator G3 is introduced into the heating vapor pipe 52. Connected to the heating steam pipe 52 is a high-temperature condensing refrigerant pipe 56 through which the high-temperature condensing refrigerant Vf3 condensed by the high-temperature refrigerant vapor Vs3 deprived of heat by the dilute solution Sw. In addition, an intermediate temperature refrigerant vapor pipe 55 is connected to the upper part of the intermediate temperature regenerator G2 for deriving the intermediate temperature refrigerant vapor Vs2 evaporated from the dilute solution Sw by the heat of the high temperature refrigerant vapor Vs3. The intermediate temperature refrigerant vapor pipe 55 is connected to the heating vapor pipe 51 of the low temperature regenerator G1. In addition, a high temperature condensing refrigerant pipe 56 is connected to the intermediate temperature refrigerant vapor pipe 55 in the middle. The intermediate temperature regenerator G2 is provided with a pressure sensor 62 as a pressure detector that detects the pressure in the intermediate temperature regenerator G2. Since the pressure sensor 62 only needs to be able to detect the pressure in the intermediate temperature regenerator G2, the pressure sensor 62 may be provided in the intermediate temperature refrigerant vapor pipe 55 in the vicinity of the intermediate temperature regenerator G2. The pressure sensor 62 is connected to the control device 60 via a signal cable, and is configured to be able to transmit the pressure signal detected by the pressure sensor 62 to the control device 60.

また、中温再生器Ｇ２には、希溶液Ｓｗ中から冷媒が蒸発して濃度が上昇した中温濃溶液Ｓｈ２を溜める中温再生器溶液溜まり２２が設けられている。中温再生器溶液溜まり２２は、典型的には、中温再生器Ｇ２の下部に中温再生器Ｇ２と一体となって形成されているが、例えば所定の容積を有するタンクを中温再生器Ｇ２から物理的に離して配管で接続して形成されていても中温再生器Ｇ２の一部であるものとする。また、中温再生器溶液溜まり２２は、タンクのような形状ではなく、配管であってもよい。中温再生器溶液溜まり２２が中温再生器Ｇ２と一体となっている場合は、中温再生器Ｇ２の本体が中温再生器溶液溜まり２２を兼ねることがある。中温再生器溶液溜まり２２の液面高さは、中温再生器Ｇ２内の圧力、希溶液Ｓｗの温度や濃度の他、中温再生器Ｇ２に中温溶液ポンプ１２により送られる希溶液Ｓｗの流量により支配される。中温再生器溶液溜まり２２には、中温濃溶液Ｓｈ２を導出する中温濃溶液導出管４５が接続されている。中温濃溶液導出管４５は、中温溶液熱交換器３２を介した後に低温濃溶液導出管４４に接続されている。中温再生器溶液溜まり２２には、その内部に溜められた中温濃溶液Ｓｈ２の高位液面を検知する高位液面センサー６５Ｈと、低位液面を検知する低位液面センサー６５Ｌとを有する中温液面検知器６５が設けられている。高位及び低位液面センサー６５Ｈ、６５Ｌには、典型的には、電極棒が用いられる。高位液面センサー６５Ｈ及び低位液面センサー６５Ｌと制御装置６０との間にはそれぞれ信号ケーブルが敷設されており、検知した高位及び低位液面信号を制御装置６０に送信することができるように構成されている。なお、高位及び低位液面センサー６５Ｈ、６５Ｌは、電極棒以外のフロートスイッチ等であってもよい。フロートスイッチとした場合は、１つのスイッチで高位液面と低位液面の両方を検知することも可能となる。また、中温再生器Ｇ２本体の液面を制御対象とする場合は、中温液面検知器６５は中温再生器Ｇ２本体内に配設される。   Further, the intermediate temperature regenerator G2 is provided with an intermediate temperature regenerator solution reservoir 22 for storing an intermediate temperature concentrated solution Sh2 whose concentration has increased due to evaporation of the refrigerant from the dilute solution Sw. The intermediate temperature regenerator solution reservoir 22 is typically formed integrally with the intermediate temperature regenerator G2 below the intermediate temperature regenerator G2. For example, a tank having a predetermined volume is physically formed from the intermediate temperature regenerator G2. It is assumed that it is a part of the medium temperature regenerator G2 even if it is formed by connecting by piping. Further, the intermediate temperature regenerator solution reservoir 22 may be a pipe instead of a tank-like shape. When the intermediate temperature regenerator solution reservoir 22 is integrated with the intermediate temperature regenerator G2, the main body of the intermediate temperature regenerator G2 may also serve as the intermediate temperature regenerator solution reservoir 22. The liquid surface height of the intermediate temperature regenerator solution reservoir 22 is controlled by the pressure in the intermediate temperature regenerator G2, the temperature and concentration of the dilute solution Sw, and the flow rate of the dilute solution Sw sent to the intermediate temperature regenerator G2 by the intermediate temperature solution pump 12. Is done. The intermediate temperature regenerator solution reservoir 22 is connected to an intermediate temperature concentrated solution outlet tube 45 for extracting the intermediate temperature concentrated solution Sh2. The intermediate temperature concentrated solution outlet tube 45 is connected to the lower temperature concentrated solution outlet tube 44 through the intermediate temperature solution heat exchanger 32. The medium temperature regenerator solution reservoir 22 has a medium temperature liquid level having a high liquid level sensor 65H for detecting a high liquid level of the medium warm concentrated solution Sh2 stored therein and a low liquid level sensor 65L for detecting a low liquid level. A detector 65 is provided. Typically, electrode bars are used for the high and low liquid level sensors 65H and 65L. Signal cables are laid between the high level liquid level sensor 65H and the low level liquid level sensor 65L and the control device 60, respectively, so that the detected high level and low level liquid level signals can be transmitted to the control device 60. Has been. The high and low liquid level sensors 65H and 65L may be float switches other than the electrode rods. When the float switch is used, it is possible to detect both the high and low liquid levels with one switch. When the liquid level of the medium temperature regenerator G2 main body is to be controlled, the medium temperature liquid level detector 65 is disposed in the medium temperature regenerator G2 main body.

高温再生器Ｇ３は、吸収器Ａから希溶液Ｓｗを導入し、希溶液Ｓｗを加熱することにより中温再生器Ｇ２におけるよりも高い温度で冷媒を蒸発させて濃度を上昇させる装置である。高温再生器Ｇ３には、希溶液Ｓｗを導入する希溶液導入管５３ａが配設されている。また、高温再生器Ｇ３は、ガスや油などを導入して燃焼させた燃焼ガスや蒸気発生ボイラ（不図示）から供給された蒸気、あるいは外部からの加熱源により希溶液Ｓｗを加熱することができるように構成されている。本実施の形態では、高温再生器Ｇ３には、希溶液Ｓｗを加熱する加熱源としての加熱用蒸気ｒを流すための加熱用蒸気管５３が下方に配設されている。加熱用蒸気管５３は、希溶液導入管５３ａから導入された希溶液Ｓｗに没入した状態となっており、高温再生器Ｇ３は、いわゆる満液式に構成されている。高温再生器Ｇ３の上部には、加熱用蒸気ｒの熱で希溶液Ｓｗから蒸発した高温冷媒蒸気Ｖｓ３を導出する高温冷媒蒸気管５４が接続されている。高温冷媒蒸気管５４は、中温再生器Ｇ２の加熱用蒸気管５２に接続されている。高温再生器Ｇ３には、高温再生器Ｇ３内の圧力を検知する圧力検知器としての圧力センサー６３が設けられている。圧力センサー６３は、高温再生器Ｇ３内の圧力を検知することができればよいので、高温再生器Ｇ３近傍の高温冷媒蒸気管５４に設けられていてもよい。圧力センサー６３は、信号ケーブルで制御装置６０と接続されており、圧力センサー６３で検知した圧力信号を制御装置６０に送信することができるように構成されている。   The high temperature regenerator G3 is a device that evaporates the refrigerant at a higher temperature than that in the intermediate temperature regenerator G2 by introducing the dilute solution Sw from the absorber A and heating the dilute solution Sw, thereby increasing the concentration. The high temperature regenerator G3 is provided with a dilute solution introduction pipe 53a for introducing dilute solution Sw. Further, the high temperature regenerator G3 can heat the dilute solution Sw by combustion gas introduced from gas, oil, or the like, combustion steam supplied from a steam generation boiler (not shown), or an external heating source. It is configured to be able to. In the present embodiment, the high-temperature regenerator G3 is provided with a heating steam pipe 53 for flowing a heating steam r as a heating source for heating the dilute solution Sw. The heating steam pipe 53 is immersed in the dilute solution Sw introduced from the dilute solution introduction pipe 53a, and the high temperature regenerator G3 is configured as a so-called full liquid type. Connected to the upper part of the high-temperature regenerator G3 is a high-temperature refrigerant vapor pipe 54 that leads out the high-temperature refrigerant vapor Vs3 evaporated from the dilute solution Sw by the heat of the heating vapor r. The high temperature refrigerant vapor pipe 54 is connected to the heating vapor pipe 52 of the intermediate temperature regenerator G2. The high temperature regenerator G3 is provided with a pressure sensor 63 as a pressure detector for detecting the pressure in the high temperature regenerator G3. Since the pressure sensor 63 only needs to be able to detect the pressure in the high temperature regenerator G3, the pressure sensor 63 may be provided in the high temperature refrigerant vapor pipe 54 in the vicinity of the high temperature regenerator G3. The pressure sensor 63 is connected to the control device 60 via a signal cable, and is configured to transmit a pressure signal detected by the pressure sensor 63 to the control device 60.

また、高温再生器Ｇ３には、希溶液Ｓｗ中に没入している加熱用蒸気管５３内を流れる加熱用蒸気ｒによって加熱されて希溶液Ｓｗ中から冷媒が蒸発し濃度が上昇した高温濃溶液Ｓｈ３を溜める高温再生器溶液溜まり２３が設けられている。高温再生器溶液溜まり２３は、典型的には、高温再生器Ｇ３の下部が、高温再生器Ｇ３の底部から上方に向かって垂直に延びる仕切板２３ａによって加熱用蒸気管５３が配設された空間と仕切られることによって形成されている。この加熱用蒸気管５３が配設された空間を、高温再生器Ｇ３の本体ということとする。高温再生器溶液溜まり２３の底部は、加熱用蒸気管５３が配設された空間の高温再生器Ｇ３の底部よりも下方になるように形成されている。高温再生器溶液溜まり２３には、加熱用蒸気管５３が配設された空間（本体）にある濃溶液Ｓｈ３のうちの仕切板２３ａを越えたものが流入するように構成されている。高温再生器溶液溜まり２３は、典型的には、高温再生器Ｇ３と一体となって形成されているが、例えば所定の容積を有するタンクを高温再生器Ｇ３から物理的に離して配管で接続して形成されていても高温再生器Ｇ３の一部であるものとする。また、高温再生器溶液溜まり２３は、タンクのような形状ではなく、配管であってもよい。高温再生器溶液溜まり２３には、高温濃溶液Ｓｈ３を導出する高温濃溶液導出管４６が接続されている。高温濃溶液導出管４６は、高温溶液熱交換器３３を介した後に低温濃溶液導出管４４と合流し、吸収器Ａの濃溶液散布ノズル７２に接続されている。高温再生器溶液溜まり２３には、その内部に溜められた高温濃溶液Ｓｈ３の高位液面を検知する高位液面センサー６６Ｈと、低位液面を検知する低位液面センサー６６Ｌとを有する高温液面検知器６６が設けられている。高位及び低位液面センサー６６Ｈ、６６Ｌには、典型的には、電極棒が用いられる。高位液面センサー６６Ｈ及び低位液面センサー６６Ｌと制御装置６０との間にはそれぞれ信号ケーブルが敷設されており、検知した液面信号を制御装置６０に送信することができるように構成されている。なお、高位及び低位液面センサー６６Ｈ、６６Ｌは、電極棒以外のフロートスイッチ等であってもよい。また、高温再生器Ｇ３本体の液面を制御対象とする場合は、高温液面検知器６６は高温再生器Ｇ３本体内に配設される。   Further, the high temperature regenerator G3 has a high temperature concentrated solution that is heated by the heating steam r flowing in the heating steam pipe 53 immersed in the dilute solution Sw to evaporate the refrigerant from the dilute solution Sw to increase its concentration. A high temperature regenerator solution reservoir 23 for storing Sh3 is provided. The high temperature regenerator solution reservoir 23 is typically a space in which a lower portion of the high temperature regenerator G3 is provided with a heating steam pipe 53 by a partition plate 23a extending vertically upward from the bottom of the high temperature regenerator G3. It is formed by partitioning. The space in which the heating steam pipe 53 is disposed is referred to as a main body of the high temperature regenerator G3. The bottom of the high temperature regenerator solution reservoir 23 is formed so as to be lower than the bottom of the high temperature regenerator G3 in the space where the heating steam pipe 53 is disposed. The high-temperature regenerator solution reservoir 23 is configured such that the concentrated solution Sh3 in the space (main body) in which the heating steam pipe 53 is disposed exceeds the partition plate 23a. The high temperature regenerator solution reservoir 23 is typically formed integrally with the high temperature regenerator G3. For example, a tank having a predetermined volume is physically separated from the high temperature regenerator G3 and connected by piping. It is assumed that it is a part of the high-temperature regenerator G3. Further, the high temperature regenerator solution reservoir 23 may be a pipe instead of a tank-like shape. The high temperature regenerator solution reservoir 23 is connected to a high temperature concentrated solution outlet tube 46 for extracting the high temperature concentrated solution Sh3. The high temperature concentrated solution outlet pipe 46 passes through the high temperature solution heat exchanger 33 and then merges with the low temperature concentrated solution outlet pipe 44 and is connected to the concentrated solution spray nozzle 72 of the absorber A. The high temperature regenerator solution reservoir 23 includes a high liquid level sensor 66H that detects a high liquid level of the high temperature concentrated solution Sh3 stored therein and a low liquid level sensor 66L that detects a low liquid level. A detector 66 is provided. Typically, electrode bars are used for the high and low liquid level sensors 66H and 66L. Signal cables are laid between the high liquid level sensor 66H and the low liquid level sensor 66L and the control device 60, respectively, so that the detected liquid level signal can be transmitted to the control device 60. . The high and low liquid level sensors 66H and 66L may be float switches other than the electrode rods. Further, when the liquid level of the high temperature regenerator G3 main body is to be controlled, the high temperature liquid level detector 66 is disposed in the high temperature regenerator G3 main body.

凝縮器Ｃは、低温再生器Ｇ１で蒸発した低温冷媒蒸気Ｖｓ１を導入し凝縮して低温凝縮冷媒Ｖｆ１とする装置である。凝縮器Ｃは低温再生器Ｇ１と共に１つの缶胴内にシェルアンドチューブ型に形成され、両者の間には仕切壁が設けられている。凝縮器Ｃは低温再生器Ｇ１と仕切壁の上部で連通しており、低温再生器Ｇ１から低温冷媒蒸気Ｖｓ１を導入することができるように構成されている。凝縮器Ｃの内部には、低温冷媒蒸気Ｖｓ１と中温凝縮冷媒Ｖｆ２を冷却するための冷却水ｑを流す冷却水管Ｃ１が配設されている。また、凝縮器Ｃには、低温再生器Ｇ１で凝縮した中温凝縮冷媒Ｖｆ２を導入する中温凝縮冷媒管５７が接続されている。凝縮器Ｃには、低温冷媒蒸気Ｖｓ１が凝縮した低温凝縮冷媒Ｖｆ１と冷却された中温凝縮冷媒Ｖｆ２とが混合した冷媒液Ｖｆを蒸発器Ｅに向けて導出する低温凝縮冷媒管５８が接続されている。   The condenser C is a device that introduces and condenses the low-temperature refrigerant vapor Vs1 evaporated in the low-temperature regenerator G1 to form a low-temperature condensed refrigerant Vf1. The condenser C is formed in a shell and tube type in one can body together with the low temperature regenerator G1, and a partition wall is provided between the two. The condenser C communicates with the low temperature regenerator G1 at the upper part of the partition wall, and is configured so that the low temperature refrigerant vapor Vs1 can be introduced from the low temperature regenerator G1. Inside the condenser C, a cooling water pipe C1 through which the cooling water q for cooling the low-temperature refrigerant vapor Vs1 and the medium-temperature condensed refrigerant Vf2 is disposed. The condenser C is connected to an intermediate temperature condensed refrigerant pipe 57 for introducing the intermediate temperature condensed refrigerant Vf2 condensed by the low temperature regenerator G1. The condenser C is connected to a low-temperature condensing refrigerant pipe 58 for deriving a refrigerant liquid Vf, which is a mixture of the low-temperature condensing refrigerant Vf1 condensed with the low-temperature refrigerant vapor Vs1 and the cooled intermediate-temperature condensing refrigerant Vf2, toward the evaporator E. Yes.

蒸発器Ｅは、凝縮器Ｃから冷媒液Ｖｆを導入して被冷却媒体ｐの熱で冷媒液Ｖｆを蒸発させる装置である。蒸発器Ｅの内部には、被冷却媒体ｐを流す冷水管７４が配設されている。蒸発器Ｅ内の冷水管７４の上部には、冷媒液Ｖｆを散布するための冷媒液散布ノズル７５が配設されている。蒸発器Ｅの下部は、導入した冷媒液Ｖｆを貯留する貯留部７６となっている。貯留部７６には貯留されている冷媒液Ｖｆを上部の冷媒液散水ノズル７５に導く循環冷媒管５９が接続されている。循環冷媒管５９には、貯留部７６に貯留している冷媒液Ｖｆを冷媒液散水ノズル７５に圧送する循環ポンプ１４が配設されている。蒸発器Ｅは吸収器Ａと共に１つの缶胴内にシェルアンドチューブ型に形成され、両者の間には仕切壁が設けられている。蒸発器Ｅは吸収器Ａと仕切壁の上部で連通しており、蒸発器Ｅで蒸発した冷媒蒸気Ｖｓを吸収器Ａに移動させることができるように構成されている。   The evaporator E is a device that introduces the refrigerant liquid Vf from the condenser C and evaporates the refrigerant liquid Vf with the heat of the medium to be cooled p. Inside the evaporator E, a cold water pipe 74 through which the medium to be cooled p flows is disposed. In the upper part of the cold water pipe 74 in the evaporator E, a refrigerant liquid spraying nozzle 75 for spraying the refrigerant liquid Vf is disposed. The lower part of the evaporator E is a storage part 76 that stores the introduced refrigerant liquid Vf. A circulating refrigerant pipe 59 that guides the stored refrigerant liquid Vf to the upper refrigerant liquid spray nozzle 75 is connected to the storage section 76. The circulating refrigerant pipe 59 is provided with a circulating pump 14 that pumps the refrigerant liquid Vf stored in the storage unit 76 to the refrigerant liquid sprinkling nozzle 75. The evaporator E and the absorber A are formed in a shell and tube type in one can body, and a partition wall is provided between the two. The evaporator E communicates with the absorber A at the upper part of the partition wall, and is configured so that the refrigerant vapor Vs evaporated by the evaporator E can be moved to the absorber A.

中温溶液ポンプ１２は、吸収器Ａから希溶液Ｓｗを中温再生器Ｇ２及び低温再生器Ｇ１に送液するポンプである。中温溶液ポンプ１２は、希溶液導出管４２に配設されている。希溶液導出管４２は中温再生器Ｇ２の希溶液散布ノズル５２ａに接続されている。中温溶液ポンプ１２より下流側の希溶液導出管４２からは希溶液管４１が分岐しており、希溶液管４１は低温再生器Ｇ１の希溶液散布ノズル５１ａに接続されている。中温溶液ポンプ１２は、吸収器Ａ内の希溶液Ｓｗを中温再生器Ｇ２に所定の圧力で送液できる程度の揚程を有しており、中温再生器Ｇ２よりも圧力が高い高温再生器Ｇ３へ送液できる揚程は有していない。言い換えれば、中温溶液ポンプ１２は過剰な揚程、流量のポンプではない。中温溶液ポンプ１２は、中温再生器Ｇ２よりも圧力が低い低温再生器Ｇ１へは送液することができる。中温溶液ポンプ１２は、制御装置６０との間に信号ケーブルが敷設されており、制御装置６０からの信号を受信して回転速度を調節することにより、希溶液Ｓｗの吐出量を調節することができるように構成されている。   The intermediate temperature solution pump 12 is a pump that sends the dilute solution Sw from the absorber A to the intermediate temperature regenerator G2 and the low temperature regenerator G1. The intermediate temperature solution pump 12 is disposed in the dilute solution outlet pipe 42. The dilute solution outlet tube 42 is connected to the dilute solution spray nozzle 52a of the intermediate temperature regenerator G2. A dilute solution pipe 41 is branched from a dilute solution outlet pipe 42 downstream of the intermediate temperature solution pump 12, and the dilute solution pipe 41 is connected to a dilute solution spray nozzle 51a of the low temperature regenerator G1. The intermediate temperature solution pump 12 has a lift so that the dilute solution Sw in the absorber A can be fed to the intermediate temperature regenerator G2 at a predetermined pressure, and is supplied to the high temperature regenerator G3 having a higher pressure than the intermediate temperature regenerator G2. It does not have a head that can deliver liquids. In other words, the medium temperature solution pump 12 is not a pump with an excessive head and flow rate. The intermediate temperature solution pump 12 can send liquid to the low temperature regenerator G1 having a lower pressure than the intermediate temperature regenerator G2. The intermediate temperature solution pump 12 is provided with a signal cable between the control device 60 and the discharge amount of the dilute solution Sw can be adjusted by receiving the signal from the control device 60 and adjusting the rotation speed. It is configured to be able to.

高温溶液ポンプ１３は、吸収器Ａから希溶液Ｓｗを高温再生器Ｇ３に送液するポンプである。高温溶液ポンプ１３は、希溶液導出管４３に配設されている。希溶液導出管４３は高温再生器Ｇ３の希溶液導入管５３ａに接続されている。高温溶液ポンプ１３は、吸収器Ａ内の希溶液Ｓｗを高温再生器Ｇ３に所定の圧力で送液できる揚程を有している。高温溶液ポンプ１３は、高温再生器Ｇ３よりも圧力が低い中温再生器Ｇ２及び低温再生器Ｇ１へも送液することができる揚程を有しているが、高温再生器Ｇ３とは圧力差がある中温再生器Ｇ２及び低温再生器Ｇ１へ高温溶液ポンプ１３でバランスよく送液しようとすると、中温再生器Ｇ２及び低温再生器Ｇ１の入口に圧力損失となる抵抗を設ける必要が生じるため、エネルギーロスを抑制する観点から、本実施の形態では中温再生器Ｇ２及び低温再生器Ｇ１へは送液していない。高温溶液ポンプ１３は、制御装置６０との間に信号ケーブルが敷設されており、制御装置６０からの信号を受信して回転速度を調節することにより、希溶液Ｓｗの吐出量を調節することができるように構成されている。   The high temperature solution pump 13 is a pump that sends the dilute solution Sw from the absorber A to the high temperature regenerator G3. The high temperature solution pump 13 is disposed in the dilute solution outlet pipe 43. The dilute solution outlet tube 43 is connected to the dilute solution introduction tube 53a of the high temperature regenerator G3. The high temperature solution pump 13 has a head that can send the dilute solution Sw in the absorber A to the high temperature regenerator G3 at a predetermined pressure. The high-temperature solution pump 13 has a head that can send liquid to the medium-temperature regenerator G2 and the low-temperature regenerator G1 whose pressure is lower than that of the high-temperature regenerator G3, but has a pressure difference from the high-temperature regenerator G3. If an attempt is made to feed the medium temperature regenerator G2 and the low temperature regenerator G1 in a well-balanced manner with the high temperature solution pump 13, it is necessary to provide a resistance that causes pressure loss at the inlets of the medium temperature regenerator G2 and the low temperature regenerator G1, so energy loss is reduced. From the viewpoint of suppression, in the present embodiment, no liquid is fed to the intermediate temperature regenerator G2 and the low temperature regenerator G1. The high-temperature solution pump 13 is laid with a signal cable between the control device 60 and the discharge amount of the dilute solution Sw can be adjusted by receiving a signal from the control device 60 and adjusting the rotation speed. It is configured to be able to.

低温溶液熱交換器３１は、低温濃溶液Ｓｈ１及び中温濃溶液Ｓｈ２が混合した濃溶液と、低温再生器Ｇ１及び中温再生器Ｇ２に送る希溶液Ｓｗとの間で熱交換させる機器である。低温溶液熱交換器３１は、典型的にはプレート型熱交換器が用いられるがシェルアンドチューブ型やその他の熱交換器を用いてもよい。低温溶液熱交換器３１は、希溶液管４１が分岐する前の希溶液導出管４２と、中温濃溶液導出管４５が合流した後の低温濃溶液導出管４４とに配設されている。   The low-temperature solution heat exchanger 31 is a device that exchanges heat between the concentrated solution obtained by mixing the low-temperature concentrated solution Sh1 and the intermediate-temperature concentrated solution Sh2 and the diluted solution Sw that is sent to the low-temperature regenerator G1 and the intermediate-temperature regenerator G2. The low temperature solution heat exchanger 31 is typically a plate type heat exchanger, but a shell and tube type or other heat exchangers may be used. The low temperature solution heat exchanger 31 is disposed in a dilute solution outlet tube 42 before the dilute solution tube 41 branches and a low temperature concentrated solution outlet tube 44 after the intermediate temperature concentrated solution outlet tube 45 has joined.

中温溶液熱交換器３２は、中温濃溶液Ｓｈ２と中温再生器Ｇ２に送る希溶液Ｓｗとの間で熱交換させる機器である。中温溶液熱交換器３２は、中温再生器溶液溜まり２２よりも下方に配設されている。中温溶液熱交換器３２は、典型的にはプレート型熱交換器が用いられるがシェルアンドチューブ型やその他の熱交換器を用いてもよい。中温溶液熱交換器３２は、希溶液管４１が分岐した後の希溶液導出管４２と、中温濃溶液導出管４５とに配設されている。   The intermediate temperature solution heat exchanger 32 is a device that exchanges heat between the intermediate temperature concentrated solution Sh2 and the dilute solution Sw sent to the intermediate temperature regenerator G2. The intermediate temperature solution heat exchanger 32 is disposed below the intermediate temperature regenerator solution reservoir 22. The medium temperature solution heat exchanger 32 is typically a plate heat exchanger, but may be a shell and tube type or other heat exchanger. The intermediate temperature solution heat exchanger 32 is disposed in the diluted solution outlet tube 42 after the diluted solution tube 41 branches and the intermediate temperature concentrated solution outlet tube 45.

高温溶液熱交換器３３は、高温濃溶液Ｓｈ３と高温再生器Ｇ３に送る希溶液Ｓｗとの間で熱交換させる機器である。高温溶液熱交換器３３は、高温再生器溶液溜まり２３よりも下方に配設されている。高温溶液熱交換器３３は、典型的にはプレート型熱交換器が用いられるがシェルアンドチューブ型やその他の熱交換器を用いてもよい。高温溶液熱交換器３３は、希溶液導出管４３と高温濃溶液導出管４６とに配設されている。なお、高温溶液熱交換器３３を複数に分割して並列もしくは直列に設置してもよい。分割して１台当たりの大きさを小さくすると、高温溶液熱交換器３３が大気圧を超える圧力となる場合であっても、内容積を小さくして安全性を高め、圧力容器に関する法規制上の取扱いを含めてより簡便な取扱いにすることができる。   The high temperature solution heat exchanger 33 is a device that exchanges heat between the high temperature concentrated solution Sh3 and the dilute solution Sw sent to the high temperature regenerator G3. The high temperature solution heat exchanger 33 is disposed below the high temperature regenerator solution reservoir 23. The high temperature solution heat exchanger 33 is typically a plate heat exchanger, but may be a shell and tube type or other heat exchanger. The high temperature solution heat exchanger 33 is disposed in the dilute solution outlet tube 43 and the hot concentrated solution outlet tube 46. Note that the high-temperature solution heat exchanger 33 may be divided into a plurality of pieces and installed in parallel or in series. If the size per unit is reduced by dividing, even if the high-temperature solution heat exchanger 33 is at a pressure exceeding atmospheric pressure, the internal volume is reduced to increase safety and Can be handled more easily including

制御装置６０は、圧力センサー６２、６３から圧力信号を受信し、また、各液面センサー６６Ｈ、６６Ｌ、６５Ｈ、６５Ｌから液面の信号を受信して、高温再生器溶液溜まり２３の液面高さが第１の所定の液面高さとなるように、及び中温再生器溶液溜まり２２の液面高さが第２の所定の液面高さとなるように、高温溶液ポンプ１３及び中温溶液ポンプ１２に信号を送信し、高温溶液ポンプ１３及び中温溶液ポンプ１２の回転速度をそれぞれ調節する装置である。第１の所定の液面は、高温再生器Ｇ３内の高温濃溶液Ｓｈ３が高温冷媒蒸気管５４に混入しないように上限を設定し、高温溶液熱交換器３３内の濃溶液Ｓｈ３が不足しないように下限を設定した液面であり、高温再生器溶液溜まり２３内（又は高温液面検知器が６６が高温再生器Ｇ３本体内に配設される場合は、高温再生器Ｇ３本体内）にある、高位液面センサー６６Ｈと低位液面センサー６６Ｌとの間の液面である。また、第２の所定の液面は、中温再生器Ｇ２内の中温濃溶液Ｓｈ２が中温冷媒蒸気管５５に流入しないように上限を設定し、中温溶液熱交換器３２内の濃溶液Ｓｈ２が不足しないように下限を設定した液面であり、中温再生器溶液溜まり２２内（又は中温液面検知器が６５が中温再生器Ｇ２本体内に配設される場合は、中温再生器Ｇ２本体内）にある、高位液面センサー６５Ｈと低位液面センサー６５Ｌとの間の液面である。   The control device 60 receives pressure signals from the pressure sensors 62 and 63, and also receives liquid level signals from the liquid level sensors 66H, 66L, 65H and 65L, and the liquid level height of the high temperature regenerator solution reservoir 23 is received. The high temperature solution pump 13 and the intermediate temperature solution pump 12 so that the liquid level height of the medium temperature regenerator solution reservoir 22 becomes the second predetermined liquid level height. Is a device that adjusts the rotational speeds of the high-temperature solution pump 13 and the medium-temperature solution pump 12, respectively. The upper limit of the first predetermined liquid level is set so that the high temperature concentrated solution Sh3 in the high temperature regenerator G3 is not mixed into the high temperature refrigerant vapor pipe 54 so that the concentrated solution Sh3 in the high temperature solution heat exchanger 33 is not short. And is in the high temperature regenerator solution pool 23 (or in the high temperature regenerator G3 main body when the high temperature liquid level detector 66 is disposed in the high temperature regenerator G3 main body). The liquid level between the high liquid level sensor 66H and the low liquid level sensor 66L. Further, the upper limit of the second predetermined liquid level is set so that the intermediate temperature concentrated solution Sh2 in the intermediate temperature regenerator G2 does not flow into the intermediate temperature refrigerant vapor pipe 55, and the concentrated solution Sh2 in the intermediate temperature solution heat exchanger 32 is insufficient. In the medium temperature regenerator solution reservoir 22 (or in the case where the medium temperature liquid level detector 65 is provided in the medium temperature regenerator G2 main body) The liquid level between the high liquid level sensor 65H and the low liquid level sensor 65L.

引き続き図１を参照して、吸収冷凍機１のサイクルを説明する。まず、冷媒側のサイクルを説明する。凝縮器Ｃでは、低温再生器Ｇ１で蒸発した低温冷媒蒸気Ｖｓ１を受け入れて、冷却塔（不図示）から供給された、冷却水管Ｃ１を流れる冷却水ｑで冷却して凝縮し、冷媒液Ｖｆ１とする。冷却水管Ｃ１を流れた冷却水ｑは、吸収器Ａへと送られる。他方、凝縮した冷媒液Ｖｆ１は、冷却水管Ｃ１を流れる冷却水ｑで冷却された中温凝縮冷媒Ｖｆ２と混合されて冷媒液Ｖｆとなって蒸発器Ｅへと送られ、貯留部７６に冷媒液Ｖｆとして貯留される。あるいは、凝縮器Ｃから蒸発器Ｅへ送られる冷媒液Ｖｆは、循環ポンプ１４で圧送される冷媒液Ｖｆと合流し、冷媒液散布ノズル７５によって冷水管７４に散布されてから貯留部７６に貯留されてもよい。貯留部７６に貯留された冷媒液Ｖｆは、循環ポンプ１４により冷媒液散布ノズル７５に送液される。蒸発器Ｅの冷媒液Ｖｆが冷媒液散布ノズル７５から冷水管７４に散布されると、冷媒液Ｖｆは冷水管７４内の被冷却媒体ｐから熱を受けて蒸発する一方、被冷却媒体ｐは冷やされる。冷やされた被冷却媒体ｐは冷熱を利用する場所（不図示）に送られて使われる。他方、蒸発器Ｅで蒸発した冷媒液Ｖｆは冷媒蒸気Ｖｓとなって、連通している吸収器Ａへと移動する。   With reference to FIG. 1, the cycle of the absorption refrigerator 1 will be described. First, the refrigerant side cycle will be described. In the condenser C, the low-temperature refrigerant vapor Vs1 evaporated in the low-temperature regenerator G1 is received, cooled by the cooling water q flowing through the cooling water pipe C1 supplied from the cooling tower (not shown), and condensed, and the refrigerant liquid Vf1 and To do. The cooling water q that has flowed through the cooling water pipe C1 is sent to the absorber A. On the other hand, the condensed refrigerant liquid Vf1 is mixed with the medium-temperature condensed refrigerant Vf2 cooled by the cooling water q flowing through the cooling water pipe C1 to be sent to the evaporator E as the refrigerant liquid Vf, and the refrigerant liquid Vf is sent to the storage section 76. As stored. Alternatively, the refrigerant liquid Vf sent from the condenser C to the evaporator E merges with the refrigerant liquid Vf pumped by the circulation pump 14, and is sprayed on the cold water pipe 74 by the refrigerant liquid spray nozzle 75 and then stored in the storage unit 76. May be. The refrigerant liquid Vf stored in the storage unit 76 is sent to the refrigerant liquid spray nozzle 75 by the circulation pump 14. When the refrigerant liquid Vf of the evaporator E is sprayed from the refrigerant liquid spray nozzle 75 to the cold water pipe 74, the refrigerant liquid Vf is evaporated by receiving heat from the medium to be cooled p in the cold water pipe 74, while the medium to be cooled p is Chilled. The cooled medium p to be cooled is sent to a place (not shown) where cold heat is used. On the other hand, the refrigerant liquid Vf evaporated by the evaporator E becomes the refrigerant vapor Vs and moves to the absorber A in communication.

次に溶液側のサイクルを説明する。吸収器Ａでは、高濃度の溶液Ｓが濃溶液散布ノズル７２から散布され、蒸発器Ｅで発生した冷媒蒸気Ｖｓを溶液Ｓが吸収して希溶液Ｓｗとなる。希溶液Ｓｗは、貯留部７３に貯留される。溶液Ｓが冷媒蒸気Ｖｓを吸収する際に発生する吸収熱は、冷却水管７１を流れる冷却水ｑによって除去される。本実施の形態における冷却水ｑは、凝縮器Ｃで使われたものを冷却水管７１に導入し、吸収熱を奪って温度が上昇した冷却水は冷却塔（不図示）に送られて空冷される。特に、三重効用吸収冷凍機では高温再生器の圧力が高くなるので、本実施の形態のように、冷却水ｑを凝縮器Ｃで利用してから吸収器Ａに導くことで低温再生器Ｇ１内の圧力の上昇を抑制し、ひいては高温再生器Ｇ３内の圧力の上昇を抑制することができる。しかしながら、吸収器Ａで利用した後に凝縮器Ｃに導いてもよい。この場合は、吸収器Ａの性能を上げることができる。また、冷却水ｑを凝縮器Ｃ及び吸収器Ａにそれぞれ別々に導いてもよい。この場合は、高温再生器Ｇ３内の圧力の上昇を抑制しつつ吸収器Ａの性能を上げることが可能となる。   Next, the solution side cycle will be described. In the absorber A, a high-concentration solution S is sprayed from the concentrated solution spray nozzle 72, and the solution S absorbs the refrigerant vapor Vs generated in the evaporator E to become a dilute solution Sw. The dilute solution Sw is stored in the storage unit 73. Absorption heat generated when the solution S absorbs the refrigerant vapor Vs is removed by the cooling water q flowing through the cooling water pipe 71. In the present embodiment, the cooling water q used in the condenser C is introduced into the cooling water pipe 71, and the cooling water whose temperature has risen due to absorption heat is sent to a cooling tower (not shown) and air-cooled. The In particular, in the triple effect absorption refrigerator, the pressure of the high-temperature regenerator increases, so that the cooling water q is used in the condenser C and then guided to the absorber A as in the present embodiment, so that the inside of the low-temperature regenerator G1. The increase in pressure in the high-temperature regenerator G3 can be suppressed. However, it may be led to the condenser C after being used in the absorber A. In this case, the performance of the absorber A can be improved. Further, the cooling water q may be separately led to the condenser C and the absorber A. In this case, it is possible to improve the performance of the absorber A while suppressing an increase in pressure in the high temperature regenerator G3.

貯留部７３の希溶液Ｓｗは、高温溶液ポンプ１３で高温再生器Ｇ３へ、中温溶液ポンプ１２で中温再生器Ｇ２及び低温再生器Ｇ１へ、それぞれ圧送される。このように、高温溶液ポンプ１３と中温溶液ポンプ１２とに分けて希溶液Ｓｗを各再生器Ｇ１〜Ｇ３へ圧送するので、各再生器Ｇ１〜Ｇ３に適切な量の希溶液Ｓｗを安定的に供給することができ、エネルギーロスを抑制することができる。なお、貯留部７３に溜まった溶液を溶液循環ポンプ（不図示）により、各再生器Ｇ１〜Ｇ３から還ってきた高濃度の溶液Ｓと混合させて濃溶液散布ノズル７２に供給できるような、構成としてもよい。また、中温溶液ポンプ１２が溶液循環ポンプを兼ねるように構成してもよい。この場合は、中温溶液ポンプ１２と低温溶液熱交換器３１との間の希溶液導出管４２から配管を分岐して濃溶液散布ノズル７２に接続するとよい。   The dilute solution Sw in the reservoir 73 is pumped to the high temperature regenerator G3 by the high temperature solution pump 13 and to the intermediate temperature regenerator G2 and the low temperature regenerator G1 by the intermediate temperature solution pump 12, respectively. In this way, since the dilute solution Sw is pumped to each of the regenerators G1 to G3 separately for the high temperature solution pump 13 and the intermediate temperature solution pump 12, an appropriate amount of dilute solution Sw is stably supplied to each of the regenerators G1 to G3. It can be supplied and energy loss can be suppressed. The solution stored in the storage unit 73 can be mixed with the high-concentration solution S returned from the regenerators G1 to G3 by a solution circulation pump (not shown) and supplied to the concentrated solution spray nozzle 72. It is good. Moreover, you may comprise so that the intermediate temperature solution pump 12 may serve as a solution circulation pump. In this case, a pipe may be branched from the dilute solution outlet pipe 42 between the intermediate temperature solution pump 12 and the low temperature solution heat exchanger 31 and connected to the concentrated solution spray nozzle 72.

希溶液導出管４３を流れる希溶液Ｓｗは、高温溶液熱交換器３３で濃溶液Ｓｈ３と熱交換して熱回収し、温度が上昇した後に希溶液導入管５３ａから高温再生器Ｇ３に導入される。高温溶液ポンプ１３で圧送されて高温再生器Ｇ３に導入された希溶液Ｓｗは、仕切板２３ａの加熱用蒸気管５３側の希溶液Ｓｗが増加していき、蒸気源（不図示）から供給された加熱用蒸気ｒによって加熱され、冷媒が蒸発して濃溶液Ｓｈ３となる。このときの高温再生器Ｇ３の作動圧力及び作動温度は、吸収冷凍機１の冷凍負荷に応じて変動しうる。冷凍負荷の変動に対しては、典型的には、加熱用蒸気管５３に導入される加熱用蒸気ｒの量を制御バルブ（不図示）にて調節することにより対応する。加熱用蒸気管５３への加熱用蒸気ｒの供給量が変動すると高温再生器Ｇ３の内圧が変動するため、作動する高温再生器Ｇ３の温度及び圧力も変動することとなる。さて、蒸発した冷媒蒸気Ｖｓ３は、中温再生器Ｇ２の加熱用蒸気管５２に送られる。高温濃溶液Ｓｈ３は、加熱用蒸気ｒからの受熱により温度が上昇しており、仕切板２３ａを越えて高温再生器溶液溜まり２３に流入した後、高温再生器Ｇ３内の圧力や重力により高温溶液熱交換器３３に導入されて希溶液Ｓｗと熱交換して熱が回収され、再び吸収器Ａへと導かれる。   The dilute solution Sw flowing through the dilute solution outlet tube 43 is heat-recovered by exchanging heat with the concentrated solution Sh3 in the high-temperature solution heat exchanger 33, and is introduced into the high-temperature regenerator G3 from the dilute solution introduction tube 53a after the temperature rises. . The dilute solution Sw pumped by the high temperature solution pump 13 and introduced into the high temperature regenerator G3 is supplied from a vapor source (not shown) as the dilute solution Sw on the heating steam pipe 53 side of the partition plate 23a increases. Heated by the heating steam r, the refrigerant evaporates to become a concentrated solution Sh3. The operating pressure and operating temperature of the high-temperature regenerator G3 at this time can vary depending on the refrigeration load of the absorption chiller 1. Typically, the fluctuation of the refrigeration load is dealt with by adjusting the amount of the heating steam r introduced into the heating steam pipe 53 with a control valve (not shown). When the supply amount of the heating steam r to the heating steam pipe 53 varies, the internal pressure of the high temperature regenerator G3 varies, so that the temperature and pressure of the operating high temperature regenerator G3 also vary. The evaporated refrigerant vapor Vs3 is sent to the heating vapor pipe 52 of the intermediate temperature regenerator G2. The temperature of the hot concentrated solution Sh3 is increased by receiving heat from the heating steam r, and after flowing into the high temperature regenerator solution reservoir 23 over the partition plate 23a, the high temperature solution Sh3 is heated by the pressure and gravity in the high temperature regenerator G3. It is introduced into the heat exchanger 33 and exchanges heat with the dilute solution Sw to recover the heat and led to the absorber A again.

他方、希溶液導出管４２を流れる希溶液Ｓｗは、まず低温溶液熱交換器３１で中温濃溶液Ｓｈ２と低温濃溶液Ｓｈ１とが混合した濃溶液と熱交換して熱回収した後に分流し、一部は中温溶液熱交換器３２へと導かれ、残りは低温再生器Ｇ１へと導かれる。中温溶液熱交換器３２に導入された希溶液Ｓｗは、中温濃溶液Ｓｈ２と熱交換して熱回収し、温度が上昇した後に中温再生器Ｇ２に導入され、希溶液散布ノズル５２ａから散布される。希溶液散布ノズル５２ａから散布された希溶液Ｓｗは、高温再生器Ｇ３で蒸発した高温冷媒蒸気Ｖｓ３によって加熱され、中温再生器Ｇ２内の希溶液Ｓｗ中の冷媒が蒸発して中温濃溶液Ｓｈ２となる。蒸発した中温冷媒蒸気Ｖｓ２は、低温再生器Ｇ１の加熱用蒸気管５１に送られる。中温濃溶液Ｓｈ２は、高温冷媒蒸気Ｖｓ３からの受熱により温度が上昇しており、中温再生器溶液溜まり２２に流入した後、重力及び中温再生器Ｇ２内の圧力により中温溶液熱交換器３２に導入されて希溶液Ｓｗと熱交換して熱が回収され、低温濃溶液Ｓｈ１と合流する。また、中温再生器Ｇ２で希溶液Ｓｗを加熱した高温冷媒蒸気Ｖｓ３は温度が低下して凝縮し、高温凝縮冷媒Ｖｆ３となって中温蒸発冷媒Ｖｓ２と合流する。中温蒸発冷媒Ｖｓ２と合流した高温凝縮冷媒Ｖｆ３は混ざり合って混合した冷媒蒸気Ｖｍとなる。   On the other hand, the dilute solution Sw flowing through the dilute solution outlet tube 42 is first divided in the low-temperature solution heat exchanger 31 after heat exchange with the concentrated solution in which the intermediate-temperature concentrated solution Sh2 and the low-temperature concentrated solution Sh1 are mixed, The part is led to the medium temperature solution heat exchanger 32, and the rest is led to the low temperature regenerator G1. The dilute solution Sw introduced into the intermediate temperature solution heat exchanger 32 is heat-recovered by exchanging heat with the intermediate temperature concentrated solution Sh2, and is introduced into the intermediate temperature regenerator G2 after the temperature rises, and is sprayed from the dilute solution spray nozzle 52a. . The dilute solution Sw sprayed from the dilute solution spray nozzle 52a is heated by the high-temperature refrigerant vapor Vs3 evaporated in the high-temperature regenerator G3, and the refrigerant in the dilute solution Sw in the intermediate-temperature regenerator G2 evaporates to form the intermediate-temperature concentrated solution Sh2. Become. The evaporated medium temperature refrigerant vapor Vs2 is sent to the heating vapor pipe 51 of the low temperature regenerator G1. The temperature of the medium temperature concentrated solution Sh2 rises due to heat received from the high-temperature refrigerant vapor Vs3. After flowing into the medium temperature regenerator solution reservoir 22, it is introduced into the medium temperature solution heat exchanger 32 by gravity and the pressure in the medium temperature regenerator G2. Then, heat is recovered by exchanging heat with the dilute solution Sw, and merges with the low temperature concentrated solution Sh1. Further, the high-temperature refrigerant vapor Vs3 obtained by heating the dilute solution Sw in the intermediate-temperature regenerator G2 is condensed at a reduced temperature, and becomes the high-temperature condensed refrigerant Vf3 and merges with the intermediate-temperature evaporative refrigerant Vs2. The high-temperature condensing refrigerant Vf3 merged with the medium-temperature evaporating refrigerant Vs2 is mixed and becomes a mixed refrigerant vapor Vm.

低温溶液熱交換器３１で温度が上昇した後に低温再生器Ｇ１に導かれた希溶液Ｓｗは、希溶液散布ノズル５１ａから散布される。希溶液散布ノズル５１ａから散布された希溶液Ｓｗは混合した冷媒蒸気Ｖｍによって加熱され、低温再生器Ｇ１内の希溶液Ｓｗ中の冷媒が蒸発して低温濃溶液Ｓｈ１となる。蒸発した低温冷媒蒸気Ｖｓ１は、凝縮器Ｃへと送られる。低温濃溶液Ｓｈ１は、冷媒蒸気Ｖｍからの受熱により温度が上昇しており、低温再生器溶液溜まり２１に流入した後、重力及び低温再生器Ｇ１内の圧力により低温濃溶液導出管４４を流れ、中温溶液熱交換器３２を出た中温濃溶液Ｓｈ２と合流した後に、低温溶液熱交換器３１に導入されて希溶液Ｓｗと熱交換して熱が回収され、その後高温濃溶液Ｓｈ３と合流した後に吸収器Ａの濃溶液散布ノズル７２から吸収器Ａ内に散布される。   The dilute solution Sw introduced to the low temperature regenerator G1 after the temperature is raised by the low temperature solution heat exchanger 31 is sprayed from the dilute solution spray nozzle 51a. The dilute solution Sw sprayed from the dilute solution spray nozzle 51a is heated by the mixed refrigerant vapor Vm, and the refrigerant in the dilute solution Sw in the low temperature regenerator G1 evaporates to become a low temperature concentrated solution Sh1. The evaporated low-temperature refrigerant vapor Vs1 is sent to the condenser C. The temperature of the low-temperature concentrated solution Sh1 has risen due to heat received from the refrigerant vapor Vm, and after flowing into the low-temperature regenerator solution reservoir 21, flows through the low-temperature concentrated solution outlet pipe 44 due to gravity and the pressure in the low-temperature regenerator G1, After joining with the medium temperature concentrated solution Sh2 exiting the medium temperature solution heat exchanger 32, it is introduced into the low temperature solution heat exchanger 31 to exchange heat with the dilute solution Sw, and then heat is recovered, and then after joining with the high temperature concentrated solution Sh3. It is sprayed into the absorber A from the concentrated solution spray nozzle 72 of the absorber A.

上述した溶液のサイクルにおいて、各再生器Ｇ１〜Ｇ３は溶液が混ざっていない冷媒蒸気を次工程に供給し、また、溶液熱交換器３１〜３３内の濃溶液が不足することによる熱交換効率の低下及び各再生器Ｇ１〜Ｇ３の伝熱面の過熱を防ぐために、各再生器Ｇ１〜Ｇ３内の濃溶液の液面を一定にすることが望ましい。ここでいう「一定」は、上述の趣旨に鑑みて、所定の幅があってもよい。上述のように、各再生器Ｇ１〜Ｇ３は冷凍負荷の変動に対応した加熱用蒸気導入量の変動に伴い内圧が変動する。各再生器Ｇ１〜Ｇ３の内圧が変動すると各溶液ポンプ１２、１３のヘッドが変動し、各再生器Ｇ１〜Ｇ３の内圧が変動する前の溶液ポンプ１２、１３の回転速度を維持していると各再生器Ｇ１〜Ｇ３内の濃溶液の液面を一定に維持することができないという事態が生じうる。そこで吸収冷凍機１は、各再生器Ｇ１〜Ｇ３内の濃溶液の液面を一定にするために、制御装置６０により、以下のような制御を行う。   In the solution cycle described above, each of the regenerators G1 to G3 supplies the refrigerant vapor not mixed with the solution to the next process, and the heat exchange efficiency due to the lack of the concentrated solution in the solution heat exchangers 31 to 33. In order to prevent lowering and overheating of the heat transfer surfaces of the regenerators G1 to G3, it is desirable to make the liquid level of the concentrated solution in each of the regenerators G1 to G3 constant. “Constant” here may have a predetermined width in view of the above-mentioned purpose. As described above, the internal pressure of each of the regenerators G1 to G3 varies with the variation of the heating steam introduction amount corresponding to the variation of the refrigeration load. When the internal pressures of the regenerators G1 to G3 change, the heads of the solution pumps 12 and 13 change, and the rotational speeds of the solution pumps 12 and 13 before the internal pressures of the regenerators G1 to G3 change are maintained. A situation may occur in which the liquid level of the concentrated solution in each of the regenerators G1 to G3 cannot be maintained constant. Therefore, the absorption refrigerator 1 performs the following control by the control device 60 in order to make the liquid level of the concentrated solution in each of the regenerators G1 to G3 constant.

高温再生器Ｇ３内の高温濃溶液Ｓｈ３の液面高さを一定にするために、高温溶液ポンプ１３は、圧力センサー６３で検知した圧力に応じて吐出量を調節する。吐出量の調節は典型的には高温溶液ポンプ１３の回転速度を調節することにより行う。回転速度の調節により吐出量を調節すると、バルブ等で絞る場合と比べて消費動力が削減できるので好ましい。圧力センサー６３で検知した圧力に応じて吐出量を調節することは、典型的には、高温再生器Ｇ３内の圧力を検知し、あらかじめ求めておいた第１の所定の液面を維持するのに必要なポンプ回転速度と高温再生器Ｇ３内圧力との関係に基づいて、検知した高温再生器Ｇ３内の圧力に応じたポンプ回転速度で高温溶液ポンプ１３を運転することにより行う。高温再生器Ｇ３内の液面高さである、高温再生器溶液溜まり２３もしくは高温再生器Ｇ３の本体内の液面高さは、高温再生器Ｇ３内の圧力と相関関係がある。すなわち、加熱用蒸気管５３に供給される加熱用蒸気ｒの流量が増加する等して、高温再生器Ｇ３内の圧力が上昇すると高温濃溶液Ｓｈ３の導出量が増えて液面が低下する。また高温溶液ポンプ１３が遠心ポンプであれば、高温再生器Ｇ３内の圧力が上昇すると希溶液Ｓｗの吐出量が減って液面が低下する。いずれにしても高温溶液ポンプ１３の吐出量を調節する（吐出量を増やす、又は減った吐出量を増やして元に戻す）ことにより、液面を所定の値に制御することができる。   In order to make the liquid level height of the hot concentrated solution Sh3 in the high temperature regenerator G3 constant, the high temperature solution pump 13 adjusts the discharge amount according to the pressure detected by the pressure sensor 63. The discharge amount is typically adjusted by adjusting the rotational speed of the high-temperature solution pump 13. It is preferable to adjust the discharge amount by adjusting the rotation speed because power consumption can be reduced as compared with the case where the amount is reduced by a valve or the like. Adjusting the discharge amount according to the pressure detected by the pressure sensor 63 typically detects the pressure in the high-temperature regenerator G3 and maintains the first predetermined liquid level obtained in advance. The high temperature solution pump 13 is operated at a pump rotation speed corresponding to the detected pressure in the high temperature regenerator G3 based on the relationship between the pump rotation speed necessary for the operation and the pressure in the high temperature regenerator G3. The liquid level in the high temperature regenerator solution reservoir 23 or the main body of the high temperature regenerator G3, which is the liquid level in the high temperature regenerator G3, has a correlation with the pressure in the high temperature regenerator G3. That is, when the pressure in the high-temperature regenerator G3 increases due to an increase in the flow rate of the heating steam r supplied to the heating steam pipe 53, the amount of the high-temperature concentrated solution Sh3 derived increases and the liquid level decreases. If the high-temperature solution pump 13 is a centrifugal pump, when the pressure in the high-temperature regenerator G3 increases, the discharge amount of the dilute solution Sw decreases and the liquid level decreases. In any case, the liquid level can be controlled to a predetermined value by adjusting the discharge amount of the high-temperature solution pump 13 (increasing the discharge amount or increasing the decreased discharge amount and returning it to the original value).

仮に、吸収冷凍機１内の圧力バランスの変動が生じ、あらかじめ求めておいた第１の所定の液面を維持するのに必要な高温溶液ポンプ１３の回転速度と高温再生器Ｇ３内圧力との関係に基づいて、検知した高温再生器Ｇ３内の圧力に応じたポンプ回転速度で高温溶液ポンプ１３を運転しても第１の所定の液面を維持することができないときは、高温溶液ポンプ１３の吐出量の修正を行うための液面の検知を、液面センサー６６Ｈ、６６Ｌによって行う。液面が下がって低位液面センサー６６Ｌが液面未検知となったら、制御装置６０は高温溶液ポンプ１３に信号を送信し、回転速度を所定値だけ増加させる。逆に液面が上昇して高位液面センサー６６Ｈが高位液面を検知したら、制御装置６０は高温溶液ポンプ１３に信号を送信し、回転速度を所定値だけ減少させる。そして、高位液面が未検知であり、低位液面が検知される場合、制御装置６０は、あらかじめ求めておいた第１の所定の液面を維持するのに必要なポンプ回転速度と高温再生器Ｇ３内圧力との関係を修正する。この修正は、高位又は低位液面センサー６６Ｈ、６６Ｌの作動により増減させた所定値に相当する回転速度分を修正する。修正することにより、液面センサー６６Ｈ、６６Ｌの作動回数が少なくなるようにする。このようにして高温再生器Ｇ３内の高温濃溶液Ｓｈ３の液面高さを第１の所定の液面高さに維持し、高温冷媒蒸気Ｖｓ３への溶液の混入や、高温溶液熱交換器３３に蒸気が混ざってしまういわゆる冷媒蒸気の吹き抜けを防いでいる。   If the pressure balance in the absorption refrigerator 1 fluctuates, the rotation speed of the high-temperature solution pump 13 and the internal pressure of the high-temperature regenerator G3 required to maintain the first predetermined liquid level obtained in advance are assumed. Based on the relationship, when the first predetermined liquid level cannot be maintained even when the high temperature solution pump 13 is operated at the pump rotation speed corresponding to the detected pressure in the high temperature regenerator G3, the high temperature solution pump 13 is used. The liquid level for correcting the discharge amount is detected by the liquid level sensors 66H and 66L. When the liquid level falls and the low liquid level sensor 66L has not detected the liquid level, the control device 60 sends a signal to the high temperature solution pump 13 to increase the rotation speed by a predetermined value. Conversely, when the liquid level rises and the high liquid level sensor 66H detects the high liquid level, the control device 60 transmits a signal to the high temperature solution pump 13 to decrease the rotational speed by a predetermined value. When the high liquid level is not detected and the low liquid level is detected, the control device 60 performs the pump rotation speed and high temperature regeneration necessary for maintaining the first predetermined liquid level obtained in advance. The relationship with the pressure in the vessel G3 is corrected. This correction corrects the rotational speed corresponding to a predetermined value increased or decreased by the operation of the high or low liquid level sensors 66H and 66L. By correcting, the number of operation times of the liquid level sensors 66H and 66L is reduced. In this way, the liquid level of the high temperature concentrated solution Sh3 in the high temperature regenerator G3 is maintained at the first predetermined liquid level, so that the solution is mixed into the high temperature refrigerant vapor Vs3, or the high temperature solution heat exchanger 33. This prevents the so-called refrigerant vapor from being blown through.

中温再生器Ｇ２内の中温濃溶液Ｓｈ２の液面高さを一定にする場合も、高温再生器Ｇ３内の高温濃溶液Ｓｈ３の液面高さを一定にするための制御と同様の制御を行う。ただし、中温再生器Ｇ２内の中温濃溶液Ｓｈ２の液面高さを一定にする場合は、圧力センサー６２で検知した圧力に応じて中温溶液ポンプ１２の吐出量を調節し、第２の所定の液面を維持することができないときは、中温溶液ポンプ１２の吐出量の修正を行うための液面の検知を、液面センサー６５Ｈ、６５Ｌによって行う。なお、中温溶液ポンプ１２が中温再生器Ｇ２と低温再生器Ｇ１に並列に希溶液Ｓｗを送液しているが、希溶液管４１に小さな圧力損失（例えばオリフィスや制御弁等）を設けることにより、中温再生器Ｇ２内の中温濃溶液Ｓｈ２の液面を一定に制御することで低温再生器Ｇ１内の低温濃溶液Ｓｈ１の液面高さも、所定の範囲内で維持することができる。   Even when the liquid level height of the medium temperature concentrated solution Sh2 in the medium temperature regenerator G2 is made constant, the same control as the control for making the liquid level height of the high temperature concentrated solution Sh3 in the high temperature regenerator G3 constant is performed. . However, when the liquid level height of the medium temperature concentrated solution Sh2 in the medium temperature regenerator G2 is made constant, the discharge amount of the medium temperature solution pump 12 is adjusted according to the pressure detected by the pressure sensor 62, and the second predetermined amount is set. When the liquid level cannot be maintained, the liquid level is detected by the liquid level sensors 65H and 65L to correct the discharge amount of the intermediate temperature solution pump 12. In addition, although the intermediate temperature solution pump 12 sends the dilute solution Sw in parallel to the intermediate temperature regenerator G2 and the low temperature regenerator G1, a small pressure loss (for example, an orifice or a control valve) is provided in the dilute solution pipe 41. The liquid level of the low temperature concentrated solution Sh1 in the low temperature regenerator G1 can be maintained within a predetermined range by controlling the liquid level of the medium temperature concentrated solution Sh2 in the medium temperature regenerator G2 to be constant.

なお、液面高さ制御は、各再生器Ｇ２、Ｇ３内の圧力を検知せずに、各再生器溶液溜まり２２、２３内の高位及び低位液面を液面センサー６５Ｈ、６５Ｌ、６６Ｈ、６６Ｌでそれぞれ検知して、それが所定の液面高さになるように各溶液ポンプ１２、１３の回転速度を調節することにより行ってもよい。また、液面の上下限の検知ではなく、例えばディスプレースメント型液面高さ検知器等の液面高さ検知器（不図示）を設けて調節器により連続的に制御してもよい。この場合、Ｐ制御又はＰＩ制御とすると制御が安定するので好ましい。また、液面センサー６５Ｈ、６５Ｌ、６６Ｈ、６６Ｌを用いずに圧力検知器６２、６３のみで液面高さを制御してもよいが、あらかじめ求めておいた所定の液面を維持するのに必要な溶液ポンプの回転速度と高温再生器Ｇ３内圧力との関係に生じたズレを検知できない場合があるため、液面センサー６５Ｈ、６５Ｌ、６６Ｈ、６６Ｌを用いることが好ましい。   In addition, the liquid level control does not detect the pressure in each of the regenerators G2 and G3, and the liquid level sensors 65H, 65L, 66H, and 66L indicate the high and low liquid levels in the regenerator solution reservoirs 22 and 23, respectively. And the rotation speeds of the solution pumps 12 and 13 may be adjusted so that the level becomes a predetermined liquid level. Further, instead of detecting the upper and lower limits of the liquid level, for example, a liquid level detector (not shown) such as a displacement type liquid level detector may be provided and continuously controlled by the adjuster. In this case, P control or PI control is preferable because the control is stable. Further, the liquid level height may be controlled only by the pressure detectors 62 and 63 without using the liquid level sensors 65H, 65L, 66H and 66L. However, in order to maintain the predetermined liquid level obtained in advance. It is preferable to use the liquid level sensors 65H, 65L, 66H, and 66L because there may be a case where it is impossible to detect a deviation caused by the relationship between the necessary rotational speed of the solution pump and the internal pressure of the high-temperature regenerator G3.

（再生器内圧力検知手段の変更）
なお、液面高さ制御を行うに際し、圧力センサー６２、６３の代わりに温度センサーを用いてもよい。
図２は、吸収冷凍機１の変形例に係る三重効用吸収冷凍機２（以下単に「吸収冷凍機２」という。）を示す系統図である。吸収冷凍機２では、圧力センサー６３に代えて高温冷媒温度検知器としての温度センサー６９を中温再生器Ｇ２の加熱用蒸気管５２の出口近くの高温凝縮冷媒管５６に設け、高温冷媒蒸気Ｖｓ３が凝縮した高温凝縮冷媒Ｖｆ３の温度を検知している。また、圧力センサー６２に代えて中温冷媒温度検知器としての温度センサー６８を中温凝縮冷媒管５７に設け、中温冷媒蒸気Ｖｓ２が凝縮した中温凝縮冷媒Ｖｆ２の温度を検知している。各凝縮冷媒Ｖｆ３、Ｖｆ２の温度は、ほぼ飽和温度であるので、飽和温度を圧力に換算して、あらかじめ求めておいた所定の液面を維持するのに必要な溶液ポンプの回転速度と各再生器Ｇ２、Ｇ３内圧力との関係に基づいて、溶液ポンプ１２、１３の回転速度を調節することで所定の液面を維持することができる。なお、検知する温度は飽和温度であることが好ましいが、必ずしも飽和温度である必要はない。過冷却した冷媒の温度であっても、加熱用蒸気管５１、５２の出口近くの温度であれば実用上差し支えない。吸収冷凍機２のその他の構成は吸収冷凍機１と同様である。 (Change of regenerator pressure detection means)
In performing the liquid level control, a temperature sensor may be used instead of the pressure sensors 62 and 63.
FIG. 2 is a system diagram showing a triple effect absorption refrigerator 2 (hereinafter simply referred to as “absorption refrigerator 2”) according to a modification of the absorption refrigerator 1. In the absorption refrigerator 2, a temperature sensor 69 as a high-temperature refrigerant temperature detector is provided in the high-temperature condensing refrigerant pipe 56 near the outlet of the heating vapor pipe 52 of the intermediate temperature regenerator G2 in place of the pressure sensor 63 so that the high-temperature refrigerant vapor Vs3 is generated. The temperature of the condensed high-temperature condensed refrigerant Vf3 is detected. Further, instead of the pressure sensor 62, a temperature sensor 68 as an intermediate temperature refrigerant temperature detector is provided in the intermediate temperature condensed refrigerant pipe 57, and the temperature of the intermediate temperature condensed refrigerant Vf2 condensed by the intermediate temperature refrigerant vapor Vs2 is detected. Since the temperatures of the respective condensed refrigerants Vf3 and Vf2 are substantially saturated temperatures, the rotation speed of each solution pump and each regeneration required to maintain the predetermined liquid level obtained in advance by converting the saturation temperature into pressure. The predetermined liquid level can be maintained by adjusting the rotation speed of the solution pumps 12 and 13 based on the relationship with the pressure in the vessels G2 and G3. In addition, although it is preferable that the temperature to detect is a saturation temperature, it does not necessarily need to be a saturation temperature. Even if it is the temperature of the supercooled refrigerant | coolant, if it is the temperature near the exit of the heating steam pipes 51 and 52, there is no problem in practical use. Other configurations of the absorption refrigerator 2 are the same as those of the absorption refrigerator 1.

（吸収器と蒸発器の多段化）
以上の説明では、吸収器と蒸発器を単段の三重効用吸収冷凍機としたが、吸収器と蒸発器を多段の三重効用吸収冷凍機としてもよい。
図３は、吸収器及び蒸発器を多段とした三重効用吸収冷凍機３（以下単に「吸収冷凍機３」という。）を示す部分系統図である。吸収冷凍機３では、吸収器Ａ（図１、２参照）を低段吸収器Ａ１と高段吸収器Ａ２の２段階に分割し、蒸発器Ｅ（図１、２参照）を低段蒸発器Ｅ１と高段蒸発器Ｅ２の２段階に分割しており、低段吸収器Ａ１と低段蒸発器Ｅ１、及び高段吸収器Ａ２と高段蒸発器Ｅ２をそれぞれ一対として独立したシェル内に設けている。そして、濃溶液は低段吸収器Ａ１に導かれた後に高段吸収器Ａ２に導かれ、被冷却媒体ｐはまず、高段蒸発器Ｅ２に導かれた後に低段蒸発器Ｅ１に導かれ、凝縮器Ｃを出た冷却水ｑは低段吸収器Ａ１と高段吸収器Ａ２とに並列に導かれるようにしたものである。その他の構成は吸収冷凍機１、２と同様である。このように吸収器Ａと蒸発器Ｅを多段の三重効用吸収冷凍機とすると、希溶液Ｓｗの濃度を低くすることができ、低温再生器Ｇ１、中温再生器Ｇ２での沸騰温度を低下させ、高温再生器Ｇ３の温度及び圧力を低下させることができる。 (Multi-stage absorber and evaporator)
In the above description, the absorber and the evaporator are single-stage triple effect absorption refrigerators, but the absorber and the evaporator may be a multi-stage triple effect absorption refrigerator.
FIG. 3 is a partial system diagram showing a triple effect absorption refrigerator 3 (hereinafter simply referred to as “absorption refrigerator 3”) in which an absorber and an evaporator are provided in multiple stages. In the absorption refrigerator 3, the absorber A (see FIGS. 1 and 2) is divided into two stages, a low stage absorber A1 and a high stage absorber A2, and the evaporator E (see FIGS. 1 and 2) is divided into a low stage evaporator. E1 and the high-stage evaporator E2 are divided into two stages, and the low-stage absorber A1 and the low-stage evaporator E1, and the high-stage absorber A2 and the high-stage evaporator E2 are provided as a pair in independent shells. ing. Then, the concentrated solution is led to the high stage absorber A2 after being led to the low stage absorber A1, and the cooled medium p is first led to the high stage evaporator E2 and then to the low stage evaporator E1. The cooling water q exiting the condenser C is guided in parallel to the low stage absorber A1 and the high stage absorber A2. Other configurations are the same as those of the absorption refrigerators 1 and 2. Thus, when the absorber A and the evaporator E are multistage triple effect absorption refrigerators, the concentration of the dilute solution Sw can be lowered, and the boiling temperature in the low temperature regenerator G1 and the medium temperature regenerator G2 is lowered. The temperature and pressure of the high temperature regenerator G3 can be reduced.

（高温再生器の変形例）
また、高温再生器Ｇ３を図１、２に示すような構成ではなく、貫流ボイラとしてもよい。
図４は、貫流ボイラとした高温再生器Ｇ３’の図であり、（ａ）は縦断面図、（ｂ）は缶胴部分の平面図である。高温再生器Ｇ３’は、円筒状の缶胴８０内に、上部と下部に環状の管寄せ８１、８２を備え、これらの管寄せ８１、８２の間に多数の伝熱管８３を環状に配列して設け、上部中央部に燃焼装置としてのバーナー８４を備え、さらに上部管寄せ８１に配管８６を介してつながる気液分離器８５を備えて構成されている。そして、下部管寄せ８２には希溶液導出管４３が接続され、気液分離器８５の上部には高温冷媒蒸気管５４が接続され、気液分離器８５の底部は配管８７を介して下部管寄せ８２に接続されている。また、気液分離器８５の底部には、高温濃溶液導出管４６が、配管８７と並列に接続されている。気液分離器８５は、高温再生器Ｇ３における高温再生器溶液溜まり２３（図１、２参照）の役割をも兼ねている。気液分離器８５には、高温再生器Ｇ３’内の圧力を検知する圧力検知器としての圧力センサー６３が設けられている。また、気液分離器８５の側面には、気相部と液相部を各連通した液位検出部９９Ｃが設けられており、液位検出部９９Ｃは、その内部に溜められた高温濃溶液Ｓｈ３の高位液面を検知する高位液面センサー６６ＣＨと、低位液面を検知する低位液面センサー６６ＣＬとを有する高温液面検知器６６Ｃが設けられている。高温液面検知器６６Ｃは、高温再生器Ｇ３における高温液面検知器６６（図１、２参照）に相当する。高温液面検知器６６Ｃは、信号ケーブルを介して制御装置６０と接続されている。 (Modification of high temperature regenerator)
Further, the high temperature regenerator G3 may be a once-through boiler instead of the configuration shown in FIGS.
4A and 4B are diagrams of a high-temperature regenerator G3 ′ as a once-through boiler, in which FIG. 4A is a longitudinal sectional view and FIG. 4B is a plan view of a can body portion. The high-temperature regenerator G3 ′ is provided with annular headers 81 and 82 at the upper and lower portions in a cylindrical can body 80, and a large number of heat transfer tubes 83 are annularly arranged between these headers 81 and 82. Provided with a burner 84 as a combustion device in the upper central part, and further provided with a gas-liquid separator 85 connected to the upper header 81 via a pipe 86. A dilute solution outlet pipe 43 is connected to the lower header 82, a high-temperature refrigerant vapor pipe 54 is connected to the upper part of the gas-liquid separator 85, and the bottom of the gas-liquid separator 85 is connected to the lower pipe via a pipe 87. It is connected to the shift 82. A hot concentrated solution outlet pipe 46 is connected to the bottom of the gas-liquid separator 85 in parallel with the pipe 87. The gas-liquid separator 85 also serves as the high temperature regenerator solution reservoir 23 (see FIGS. 1 and 2) in the high temperature regenerator G3. The gas-liquid separator 85 is provided with a pressure sensor 63 as a pressure detector for detecting the pressure in the high temperature regenerator G3 ′. Further, a liquid level detection unit 99C in which the gas phase part and the liquid phase part are communicated with each other is provided on the side surface of the gas-liquid separator 85, and the liquid level detection part 99C is a high-temperature concentrated solution stored therein. A high temperature liquid level detector 66C having a high liquid level sensor 66CH for detecting the high liquid level of Sh3 and a low liquid level sensor 66CL for detecting the low liquid level is provided. The high temperature liquid level detector 66C corresponds to the high temperature liquid level detector 66 (see FIGS. 1 and 2) in the high temperature regenerator G3. The high-temperature liquid level detector 66C is connected to the control device 60 via a signal cable.

なお、高温再生器Ｇ３’における液面検知器として、気液分離器８５内に、その内部に溜められた高温濃溶液Ｓｈ３の高位液面を検知する高位液面センサー６６ＤＨと、低位液面を検知する低位液面センサー６６ＤＬとを有する高温液面検知器６６Ｄを設けてもよい。あるいは、上部管寄せ８１及び下部管寄せ８２間に連通管９０を設け、連通管９０に液位検出部９９Ａを配設して、液位検出部９９Ａ内に高温濃溶液Ｓｈ３の高位液面を検知する高位液面センサー６６ＡＨと、低位液面を検知する低位液面センサー６６ＡＬとを有する高温液面検知器６６Ａを設けてもよく、又は、上部管寄せ８１から特定の伝熱管８３内に高温濃溶液Ｓｈ３の高位液面を検知する高位液面センサー６６ＢＨと、低位液面を検知する低位液面センサー６６ＢＬとを有する高温液面検知器６６Ｂを設けてもよい。高温液面検知器６６Ａ、６６Ｂ、６６Ｄが設けられる場合は、これらもそれぞれ信号ケーブルを介して制御装置６０と接続されている。高温再生器Ｇ３’は、高温液面検知器６６Ａ〜６６Ｄのいずれか１つを備える構成としてもよく、あるいはこれらの任意の組み合わせ、又はすべてを備える構成としてもよい。典型的には、高温液面検知器６６Ｂは伝熱管８３の過熱防止のための液面検知に適しており、高温液面検知器６６Ｃ、６６Ｄは冷媒蒸気Ｖｓ３への高温濃溶液Ｓｈ３の混入の防止や吸収器Ａ（図１、２参照）への高温濃溶液Ｓｈ３の安定供給のための液面検知に適するといった利点があるため、高温液面検知器６６Ａ〜６６Ｄを制御目的に応じて配設することが好ましい。   As a liquid level detector in the high temperature regenerator G3 ′, a high liquid level sensor 66DH for detecting a high liquid level of the high temperature concentrated solution Sh3 stored in the gas-liquid separator 85, and a low liquid level are provided. A high temperature liquid level detector 66D having a low level liquid level sensor 66DL to detect may be provided. Alternatively, a communication pipe 90 is provided between the upper header 81 and the lower header 82, a liquid level detection unit 99A is provided in the communication pipe 90, and a high liquid level of the hot concentrated solution Sh3 is provided in the liquid level detection unit 99A. A high-temperature liquid level detector 66A having a high-level liquid level sensor 66AH for detecting and a low-level liquid level sensor 66AL for detecting a low level liquid level may be provided, or a high temperature may be provided from the upper header 81 into a specific heat transfer tube 83. A high temperature liquid level detector 66B having a high liquid level sensor 66BH for detecting the high liquid level of the concentrated solution Sh3 and a low liquid level sensor 66BL for detecting the low liquid level may be provided. When the high-temperature liquid level detectors 66A, 66B, and 66D are provided, these are also connected to the control device 60 via signal cables, respectively. The high temperature regenerator G3 'may be configured to include any one of the high temperature liquid level detectors 66A to 66D, or may be configured to include any combination or all of them. Typically, the high-temperature liquid level detector 66B is suitable for liquid level detection for preventing overheating of the heat transfer tube 83, and the high-temperature liquid level detectors 66C and 66D are used for mixing the high-temperature concentrated solution Sh3 into the refrigerant vapor Vs3. Therefore, the high-temperature liquid level detectors 66A to 66D are arranged in accordance with the control purpose because they are suitable for the liquid level detection for the prevention and the stable supply of the hot concentrated solution Sh3 to the absorber A (see FIGS. 1 and 2). It is preferable to install.

さらに高温再生器Ｇ３’は、制御機器の故障や溶液配管系の損傷、溶液ポンプ１３（図１、２参照）の故障等により高温再生器Ｇ３’が過熱等で損傷するのを防ぐための、各種の安全保護機能を備えていることが好ましい。   Furthermore, the high temperature regenerator G3 ′ is used to prevent the high temperature regenerator G3 ′ from being damaged due to overheating due to a failure of the control device, a damage of the solution piping system, a failure of the solution pump 13 (see FIGS. 1 and 2), It is preferable to have various safety protection functions.

例えば、吸収冷凍機の運転中に高温再生器Ｇ３’内の液位があらかじめ設定した安全下限液位より低下した場合に生じうる伝熱管８３や管寄せ８１、８２の熱変形や過熱による損傷を防止するために、溶液の液位が安全下限液位より低下したことを検知する低液位検知器を、液位検出部９９Ａ内（低液位検知器９１Ａ）や伝熱管８３内（低液位検知器９１Ｂ）に設けるとよい。あるいは別途低液位検知器９１Ａ、９１Ｂを設けずに、高温液面検知器６６Ａ、６６Ｂ、６６Ｃ、６６Ｄの低位液面センサー６６ＡＬ、６６ＢＬ、６６ＣＬ、６６ＤＬが所定時間接液がないことをもって溶液の液位が安全下限液位より低下したことを検知してもよい。   For example, damage due to thermal deformation or overheating of the heat transfer tubes 83 and headers 81 and 82 that may occur when the liquid level in the high-temperature regenerator G3 ′ falls below the preset safety lower limit liquid level during operation of the absorption refrigerator. In order to prevent this, a low liquid level detector that detects that the liquid level of the solution has fallen below the safety lower limit liquid level is provided in the liquid level detector 99A (low liquid level detector 91A) or in the heat transfer tube 83 (low liquid). It may be provided in the position detector 91B). Alternatively, the low liquid level detectors 91A, 91B are not provided separately, and the low liquid level sensors 66AL, 66BL, 66CL, 66DL of the high temperature liquid level detectors 66A, 66B, 66C, 66D are not in contact with the liquid for a predetermined time. It may be detected that the liquid level has fallen below the safety lower limit liquid level.

また、高温再生器Ｇ３’の缶内圧力が安全上限圧力を超えて上昇した場合に缶内圧力を低下させるために、例えば気液分離器８５に安全弁吐出管８８を接続してここに安全弁８９を配設するとよい。安全弁８９の作動時に外部からの空気等が高温再生器Ｇ３’内に漏れ込むと吸収冷凍機の真空状態が破壊されるため、安全弁８９が作動して放出される冷媒蒸気Ｖｓ３は中温再生器Ｇ２（図１、２参照）や低温再生器Ｇ１（図１、２参照）、あるいは凝縮器Ｃ（図１、２参照）、もしくはこれらと連結した配管へ導かれるように構成するとよい。また、制御装置６０と電気的に接続されていない安全弁８９の作動を検知するため、安全弁吐出管８８に、安全弁吐出管８８内の圧力を検知する安全弁圧力検知器９２や温度を検知する安全弁温度検知器９３、もしくは安全弁吐出管８８の振動を検知する安全弁振動検知器９４を設けるとよい。安全弁圧力検知器９２、安全弁温度検知器９３、安全弁振動検知器９４は、いずれか１つもしくは組み合わせて設置してもよく、信号ケーブルを介して制御装置６０と接続される。   Further, in order to reduce the pressure in the can when the pressure in the can of the high temperature regenerator G3 ′ rises above the safety upper limit pressure, for example, a safety valve discharge pipe 88 is connected to the gas-liquid separator 85 and a safety valve 89 is connected here. It is good to arrange. If air or the like from the outside leaks into the high temperature regenerator G3 ′ during the operation of the safety valve 89, the vacuum state of the absorption chiller is destroyed. Therefore, the refrigerant vapor Vs3 released by the operation of the safety valve 89 is the medium temperature regenerator G2. (Refer to FIGS. 1 and 2), a low-temperature regenerator G1 (see FIGS. 1 and 2), a condenser C (see FIGS. 1 and 2), or a pipe connected thereto. In addition, in order to detect the operation of the safety valve 89 that is not electrically connected to the control device 60, a safety valve pressure detector 92 that detects the pressure in the safety valve discharge pipe 88 and a safety valve temperature that detects the temperature are included in the safety valve discharge pipe 88. A detector 93 or a safety valve vibration detector 94 that detects the vibration of the safety valve discharge pipe 88 may be provided. The safety valve pressure detector 92, the safety valve temperature detector 93, and the safety valve vibration detector 94 may be installed either alone or in combination, and are connected to the control device 60 via a signal cable.

また、高温再生器Ｇ３’の缶体の温度が過熱状態となった場合に生じうる熱変形や過熱による損傷を防止するために、缶体表面の温度を検知する表面温度検知器を、上部管寄せ８１表面（表面温度検知器９５Ａ）や伝熱管８３表面（表面温度検知器９５Ｂ）、又は下部管寄せ８２表面（表面温度検知器９５Ｃ）に設けるとよい。あるいは、過熱状態を検知するために、上部管寄せ８１内の高温濃溶液Ｓｈ３の温度を検知する缶内温度検知器９６Ａや、下部管寄せ８２内の希溶液Ｓｗの温度を検知する缶内温度検知器９６Ｂを設けてもよい。表面温度検知器９５Ａ〜９５Ｃ、缶内温度検知器９６Ａ、９６Ｂは、信号ケーブルを介して制御装置６０と接続される。   Further, in order to prevent thermal deformation and damage due to overheating that can occur when the temperature of the can of the high-temperature regenerator G3 ′ becomes an overheated state, a surface temperature detector that detects the temperature of the can body surface is provided with an upper tube. It may be provided on the surface of the header 81 (surface temperature detector 95A), the surface of the heat transfer tube 83 (surface temperature detector 95B), or the surface of the lower header 82 (surface temperature detector 95C). Alternatively, in order to detect an overheated state, an in-can temperature detector 96A that detects the temperature of the hot concentrated solution Sh3 in the upper header 81, or an in-can temperature that detects the temperature of the dilute solution Sw in the lower header 82. A detector 96B may be provided. The surface temperature detectors 95A to 95C and the in-can temperature detectors 96A and 96B are connected to the control device 60 via a signal cable.

また、燃焼装置の故障等で煤が発生することにより排ガスｅの温度が安全上限を超えて上昇した場合に燃焼を停止するために、排ガス管９７に排ガス温度検知器９８を設けるとよい。排ガス温度検知器９８は、信号ケーブルを介して制御装置６０と接続される。   Further, an exhaust gas temperature detector 98 is preferably provided in the exhaust gas pipe 97 in order to stop combustion when the temperature of the exhaust gas e rises above the upper limit of safety due to the occurrence of soot due to a failure of the combustion device or the like. The exhaust gas temperature detector 98 is connected to the control device 60 via a signal cable.

高温再生器Ｇ３’では、希溶液Ｓｗが下部管寄せ８２に導入され、高温溶液ポンプ１３（図１、２参照）の圧力で複数の伝熱管８３を通って上部管寄せ８１に至る。このとき、バーナー８４に空気とガス又は油を供給して燃焼させ、この燃焼の熱を加熱源として伝熱管８３を通過する希溶液Ｓｗを加熱して、希溶液Ｓｗから冷媒を蒸発させる。すなわち、高温再生器Ｇ３’では、加熱用蒸気ｒ（図１、２参照）の代わりに、ガス又は油を導入している。伝熱管８３で加熱された希溶液Ｓｗからは冷媒蒸気が発生し、典型的には液面は伝熱管８３内に維持されて、濃溶液Ｓｈ３と冷媒蒸気Ｖｓ３とが気液２相流（混相流）の状態で配管８６を通って気液分離器８５に流入する。気液分離器８５では、上部から冷媒蒸気Ｖｓ３が導出され、下部からは高温濃溶液Ｓｈ３の一部が下部管寄せ８２に戻され、残りが高温濃溶液導出管４６から吸収器Ａ（図１、２参照）に向けて導出される。高温再生器Ｇ３’では、伝熱管８３内で冷媒蒸気Ｖｓ３が発生し、上部管寄せ８１を介して気液分離器８５に流れる高温濃溶液Ｓｈ３の流量が吸収器Ａから高温溶液ポンプ１３で供給される希溶液Ｓｗの流量よりも大きいため、気液分離器８５内の高温濃溶液Ｓｈ３の一部を下部管寄せ８２に戻すこととしている。このように、三重効用吸収冷凍機では、高温再生器Ｇ３が大気圧以上となるので、高温再生器を貫流式ボイラとすることが好ましい。   In the high temperature regenerator G3 ', the dilute solution Sw is introduced into the lower header 82, and reaches the upper header 81 through the plurality of heat transfer tubes 83 with the pressure of the high temperature solution pump 13 (see FIGS. 1 and 2). At this time, air and gas or oil are supplied to the burner 84 for combustion, and the diluted solution Sw passing through the heat transfer tube 83 is heated using the heat of combustion as a heating source to evaporate the refrigerant from the diluted solution Sw. That is, in the high temperature regenerator G3 ', gas or oil is introduced instead of the heating steam r (see FIGS. 1 and 2). Refrigerant vapor is generated from the dilute solution Sw heated by the heat transfer tube 83. Typically, the liquid level is maintained in the heat transfer tube 83, and the concentrated solution Sh3 and the refrigerant vapor Vs3 are in a gas-liquid two-phase flow (mixed phase). Flow) through the pipe 86 and into the gas-liquid separator 85. In the gas-liquid separator 85, the refrigerant vapor Vs3 is led out from the upper part, a part of the hot concentrated solution Sh3 is returned from the lower part to the lower header 82, and the rest is absorbed from the hot concentrated solution outlet pipe 46 in the absorber A (FIG. 1). 2). In the high temperature regenerator G3 ′, the refrigerant vapor Vs3 is generated in the heat transfer tube 83, and the flow rate of the hot concentrated solution Sh3 flowing to the gas-liquid separator 85 through the upper header 81 is supplied from the absorber A by the high temperature solution pump 13. Since the flow rate of the diluted solution Sw is larger, a part of the hot concentrated solution Sh3 in the gas-liquid separator 85 is returned to the lower header 82. Thus, in the triple effect absorption refrigerator, since the high temperature regenerator G3 is at atmospheric pressure or higher, it is preferable that the high temperature regenerator is a once-through boiler.

なお、高温再生器Ｇ３’が各種の安全保護機能を備える場合は、以下のように作用する。低液位検知器９１Ａ、９１Ｂや高温液面検知器６６Ａ、６６Ｂ、６６Ｃ、６６Ｄを備える場合において、検知器９１Ａ、９１Ｂでの液面が低下し液面未検知となるか、検知器６６Ａ、６６Ｂ、６６Ｃ、６６Ｄの低位液面センサー６６ＡＬ、６６ＢＬ、６６ＣＬ、６６ＤＬが所定時間接液しないときには、制御装置６０に信号を送信し、信号を受信した制御装置６０は、警報装置（不図示）に信号を送信して警報を発すると共にバーナー８４への燃料の供給を燃料バルブ（不図示）を閉じるなどして停止させ、バーナー８４での燃焼を緊急停止させる。   In addition, when the high temperature regenerator G3 'has various safety protection functions, it operates as follows. In the case where the low liquid level detectors 91A and 91B and the high temperature liquid level detectors 66A, 66B, 66C and 66D are provided, the liquid level at the detectors 91A and 91B decreases and the liquid level is not detected, or the detector 66A, When the lower liquid level sensors 66AL, 66BL, 66CL, 66DL of 66B, 66C, 66D do not contact with liquid for a predetermined time, a signal is transmitted to the control device 60, and the control device 60 that has received the signal sends an alarm device (not shown). A signal is transmitted to issue an alarm and fuel supply to the burner 84 is stopped by closing a fuel valve (not shown) or the like, and combustion in the burner 84 is stopped urgently.

また、安全弁８９を備える場合において、高温再生器Ｇ３’の缶内圧力が安全上限圧力を超えて上昇したら安全弁８９が作動する。安全弁８９は機械的に作動するため、安全弁８９が作動したか否かを安全弁圧力検知器９２、安全弁温度検知器９３、安全弁振動検知器９４で検知する。各検知器９２、９３、９４は制御装置６０に随時信号を送信する。安全弁圧力検知器９２を備える場合は検知した圧力があらかじめ設定した安全上限値に達したときに、また、安全弁温度検知器９３を備える場合は検知した温度があらかじめ設定した安全上限値に達したときに、安全弁８９が作動したと判断して、制御装置６０は警報装置（不図示）に信号を送信して警報を発すると共にバーナー８４への燃料の供給を燃料バルブ（不図示）を閉じるなどして停止させ、バーナー８４での燃焼を緊急停止させる。また、安全弁振動検知器９４を備える場合は、検知した振動値があらかじめ設定した値に達したときに、安全弁８９の作動により冷媒蒸気Ｖｓ３が吹き出して安全弁吐出管８８に強度の振動が生じたものと判断して、制御装置６０は警報装置（不図示）に信号を送信して警報を発すると共にバーナー８４への燃料の供給を燃料バルブ（不図示）を閉じるなどして停止させ、バーナー８４での燃焼を緊急停止させる。   In the case where the safety valve 89 is provided, the safety valve 89 is activated when the internal pressure of the high-temperature regenerator G3 'rises above the safe upper limit pressure. Since the safety valve 89 is mechanically operated, the safety valve pressure detector 92, the safety valve temperature detector 93, and the safety valve vibration detector 94 detect whether the safety valve 89 has been operated. Each detector 92, 93, 94 transmits a signal to the control device 60 as needed. When the safety valve pressure detector 92 is provided, when the detected pressure reaches the preset safety upper limit value, and when the safety valve temperature detector 93 is provided, the detected temperature reaches the preset safety upper limit value. In addition, it is determined that the safety valve 89 has been activated, and the control device 60 transmits a signal to an alarm device (not shown) to issue an alarm and close the fuel valve (not shown) to supply fuel to the burner 84. To stop the combustion in the burner 84 urgently. Further, when the safety valve vibration detector 94 is provided, when the detected vibration value reaches a preset value, the safety valve 89 is actuated to blow out the refrigerant vapor Vs3, and the safety valve discharge pipe 88 is vibrated with high intensity. Therefore, the control device 60 transmits a signal to an alarm device (not shown) to give an alarm and stop the supply of fuel to the burner 84 by closing a fuel valve (not shown). Emergency stop the combustion.

また、表面温度検知器９５Ａ、９５Ｂや缶内温度検知器９６Ａ、９６Ｂを備える場合において、各検知器９５Ａ、９５Ｂ、９６Ａ、９６Ｂは制御装置６０に随時信号を送信し、信号を受信した制御装置６０は、あらかじめ設定した安全上限温度以上の温度と判断したら、警報装置（不図示）に信号を送信して警報を発すると共にバーナー８４への燃料の供給を燃料バルブ（不図示）を閉じるなどして停止させ、バーナー８４での燃焼を緊急停止させる。   Further, when the surface temperature detectors 95A and 95B and the in-can temperature detectors 96A and 96B are provided, the detectors 95A, 95B, 96A, and 96B transmit signals to the control device 60 as needed, and the control devices that have received the signals. When it is determined that the temperature is equal to or higher than a preset safety upper limit temperature, 60 sends a signal to an alarm device (not shown) to issue an alarm and close the fuel valve (not shown) to supply fuel to the burner 84. To stop the combustion in the burner 84 urgently.

また、排ガス温度検知器９８を備える場合において、排ガス温度検知器９８は制御装置６０に随時信号を送信し、信号を受信した制御装置６０は、あらかじめ設定した安全上限温度以上の温度になると異常燃焼を判断し、警報装置（不図示）に信号を送信して警報を発すると共にバーナー８４への燃料の供給を燃料バルブ（不図示）を閉じるなどして停止させ、バーナー８４での燃焼を緊急停止させる。   Further, when the exhaust gas temperature detector 98 is provided, the exhaust gas temperature detector 98 transmits a signal to the control device 60 as needed, and the control device 60 that receives the signal abnormally burns when the temperature reaches a preset safety upper limit temperature or higher. Is sent to a warning device (not shown) to issue a warning, and the fuel supply to the burner 84 is stopped by closing the fuel valve (not shown), etc., and the combustion in the burner 84 is stopped immediately. Let

（熱回収手段の追加）
上述の各三重効用吸収冷凍機において、各溶液熱交換器３１〜３３における溶液同士の熱交換による熱回収に加えて、中温再生器Ｇ２のドレンＶｆ３や低温再生器Ｇ１のドレンＶｆ２と希溶液Ｓｗとの熱交換による熱回収、及び高温再生器Ｇ３’からの排ガスと希溶液Ｓｗとの熱交換による熱回収を行ってもよい。また、高温再生器Ｇ３’からの排ガスの熱回収は、高温再生器Ｇ３’への燃焼用の供給空気との間で行ってもよい。以下に、熱回収手段を追加したものに特有な部分を説明する。
図５は、中温再生器及び低温再生器へ送液される希溶液で凝縮冷媒から熱回収する溶液系統の部分系統図であり、（ａ）は低温溶液熱交換器３１と中温凝縮冷媒溶液熱交換器３７、及び中温溶液熱交換器３２と高温凝縮冷媒溶液熱交換器３６をそれぞれ直列に配置した部分系統図、（ｂ）は低温溶液熱交換器３１と中温凝縮冷媒溶液熱交換器３７、及び中温溶液熱交換器３２と高温凝縮冷媒溶液熱交換器３６をそれぞれ並列に配置した部分系統図、（ｃ）は直列に配置した中温凝縮冷媒溶液熱交換器３７と高温凝縮冷媒溶液熱交換器３６に対して低温溶液熱交換器３１及び中温溶液熱交換器３２が並列になるように配置した部分系統図である。なお、図５では、吸収冷凍機１、２（図１、２参照）のうち溶液系統の吸収器Ａから各再生器Ｇ１〜Ｇ３への溶液送りラインを示しており、他の構成の図示は省略している。図５に示すように、凝縮冷媒から熱回収を行う場合は、高温凝縮冷媒Ｖｆ３と希溶液Ｓｗとで熱交換を行う高温凝縮冷媒溶液熱交換器３６と、中温凝縮冷媒Ｖｆ２と希溶液Ｓｗとで熱交換を行う中温凝縮冷媒溶液熱交換器３７を備えている。高温凝縮冷媒溶液熱交換器３６及び中温凝縮冷媒溶液熱交換器３７は、典型的にはプレート型熱交換器が用いられるがシェルアンドチューブ型やその他の熱交換器を用いてもよい。 (Addition of heat recovery means)
In each of the above triple effect absorption refrigerators, in addition to heat recovery by heat exchange between solutions in each solution heat exchanger 31-33, drain Vf3 of intermediate temperature regenerator G2, drain Vf2 of low temperature regenerator G1, and dilute solution Sw Recovery by heat exchange with the heat exchanger, and heat recovery by heat exchange between the exhaust gas from the high temperature regenerator G3 ′ and the dilute solution Sw may be performed. Further, the heat recovery of the exhaust gas from the high temperature regenerator G3 ′ may be performed with the supply air for combustion to the high temperature regenerator G3 ′. Below, the part peculiar to what added the heat | fever recovery means is demonstrated.
FIG. 5 is a partial system diagram of a solution system in which heat is recovered from the condensed refrigerant with a dilute solution sent to the intermediate temperature regenerator and the low temperature regenerator, and (a) is a low temperature solution heat exchanger 31 and medium temperature condensed refrigerant solution heat. The partial system diagram which has arrange | positioned the exchanger 37, the intermediate temperature solution heat exchanger 32, and the high temperature condensed refrigerant | coolant solution heat exchanger 36 in series, respectively, (b) is the low temperature solution heat exchanger 31 and the intermediate temperature condensed refrigerant solution heat exchanger 37, 4 is a partial system diagram in which the intermediate temperature solution heat exchanger 32 and the high temperature condensing refrigerant solution heat exchanger 36 are arranged in parallel, respectively, and (c) is an intermediate temperature condensing refrigerant solution heat exchanger 37 and a high temperature condensing refrigerant solution heat exchanger arranged in series. FIG. 6 is a partial system diagram in which a low-temperature solution heat exchanger 31 and a medium-temperature solution heat exchanger 32 are arranged in parallel to 36. In addition, in FIG. 5, the solution feed line from the absorber A of the solution system to each of the regenerators G1 to G3 in the absorption refrigerators 1 and 2 (see FIGS. 1 and 2) is shown. Omitted. As shown in FIG. 5, when performing heat recovery from the condensed refrigerant, the high-temperature condensed refrigerant solution heat exchanger 36 that performs heat exchange between the high-temperature condensed refrigerant Vf3 and the diluted solution Sw, the intermediate-temperature condensed refrigerant Vf2, and the diluted solution Sw The intermediate temperature condensed refrigerant solution heat exchanger 37 that performs heat exchange is provided. The high temperature condensed refrigerant solution heat exchanger 36 and the medium temperature condensed refrigerant solution heat exchanger 37 are typically plate-type heat exchangers, but may be shell-and-tube type or other heat exchangers.

図５（ａ）に示すように低温溶液熱交換器３１と中温凝縮冷媒溶液熱交換器３７、及び中温溶液熱交換器３２と高温凝縮冷媒溶液熱交換器３６をそれぞれ直列に配置した場合は、低温溶液熱交換器３１を通過して希溶液管４１に分流した希溶液Ｓｗが低温再生器Ｇ１で凝縮した中温凝縮冷媒Ｖｆ２と中温凝縮冷媒溶液熱交換器３７で熱交換して熱回収を行う。他方、低温溶液熱交換器３１を通過後中温溶液熱交換器３２を通過した希溶液Ｓｗが中温再生器Ｇ２で凝縮した高温凝縮冷媒Ｖｆ３と高温凝縮冷媒溶液熱交換器３６で熱交換して熱回収を行う。この場合は、中温再生器Ｇ２及び低温再生器Ｇ１に導入される希溶液Ｓｗの温度を高くすることができる。   When the low temperature solution heat exchanger 31 and the medium temperature condensed refrigerant solution heat exchanger 37 and the medium temperature solution heat exchanger 32 and the high temperature condensed refrigerant solution heat exchanger 36 are respectively arranged in series as shown in FIG. Heat recovery is performed by exchanging heat in the intermediate-temperature condensed refrigerant solution heat exchanger 37 and the intermediate-temperature condensed refrigerant solution heat exchanger 37 in which the diluted solution Sw that has passed through the low-temperature solution heat exchanger 31 and is divided into the diluted solution pipe 41 is condensed in the low-temperature regenerator G1. . On the other hand, the dilute solution Sw that has passed through the low temperature solution heat exchanger 31 and then passed through the intermediate temperature heat exchanger 32 is heat-exchanged by the high temperature condensed refrigerant solution heat exchanger 36 and the high temperature condensed refrigerant solution heat exchanger 36 that has condensed in the intermediate temperature regenerator G2. Collect. In this case, the temperature of the dilute solution Sw introduced into the intermediate temperature regenerator G2 and the low temperature regenerator G1 can be increased.

図５（ｂ）に示すように低温溶液熱交換器３１と中温凝縮冷媒溶液熱交換器３７、及び中温溶液熱交換器３２と高温凝縮冷媒溶液熱交換器３６をそれぞれ並列に配置した場合は、中温溶液ポンプ１２の吐出側で希溶液Ｓｗが分流した後に低温溶液熱交換器３１及び中温凝縮冷媒溶液熱交換器３７にそれぞれ導入される。中温凝縮冷媒溶液熱交換器３７に導入された希溶液Ｓｗは、中温凝縮冷媒Ｖｆ２と熱交換した後に低温再生器Ｇ１に導入される。他方、低温溶液熱交換器３１に導入された希溶液Ｓｗは低温濃溶液Ｓｈ１（図１、２参照）と熱交換する。熱交換して低温溶液熱交換器３１から導出された希溶液Ｓｗは、一部が低温再生器Ｇ１に導入され、残りはさらに分流して中温溶液熱交換器３２及び高温凝縮冷媒溶液熱交換器３６にそれぞれ導入される。中温溶液熱交換器３２に導入された希溶液Ｓｗは中温濃溶液Ｓｈ２（図１、２参照）と熱交換し、高温凝縮冷媒溶液熱交換器３６に導入された希溶液Ｓｗは高温凝縮冷媒Ｖｆ３と熱交換した後に合流して中温再生器Ｇ２に導入される。この場合は、中温凝縮冷媒溶液熱交換器３７と低温溶液熱交換器３１の溶液分流比、高温凝縮冷媒溶液熱交換器３６と中温溶液熱交換器３２の溶液分流比を調整することができ、各熱交換器の熱交換量を調整しつつ、中温再生器Ｇ２、低温再生器Ｇ１に導入される希溶液Ｓｗの温度を高くすることができる。   When the low temperature solution heat exchanger 31 and the medium temperature condensed refrigerant solution heat exchanger 37 and the medium temperature solution heat exchanger 32 and the high temperature condensed refrigerant solution heat exchanger 36 are arranged in parallel as shown in FIG. After diluting the dilute solution Sw on the discharge side of the intermediate temperature solution pump 12, it is introduced into the low temperature solution heat exchanger 31 and the intermediate temperature condensed refrigerant solution heat exchanger 37, respectively. The dilute solution Sw introduced into the intermediate temperature condensed refrigerant solution heat exchanger 37 is introduced into the low temperature regenerator G1 after exchanging heat with the intermediate temperature condensed refrigerant Vf2. On the other hand, the dilute solution Sw introduced into the low temperature solution heat exchanger 31 exchanges heat with the low temperature concentrated solution Sh1 (see FIGS. 1 and 2). The dilute solution Sw derived from the low-temperature solution heat exchanger 31 through heat exchange is partially introduced into the low-temperature regenerator G1, and the rest is further diverted to the intermediate-temperature solution heat exchanger 32 and the high-temperature condensed refrigerant solution heat exchanger. 36 respectively. The dilute solution Sw introduced into the intermediate temperature solution heat exchanger 32 exchanges heat with the intermediate temperature concentrated solution Sh2 (see FIGS. 1 and 2), and the dilute solution Sw introduced into the high temperature condensed refrigerant solution heat exchanger 36 is converted into the high temperature condensed refrigerant Vf3. After exchanging heat with each other, they merge and are introduced into the intermediate temperature regenerator G2. In this case, it is possible to adjust the solution diversion ratio between the medium temperature condensing refrigerant solution heat exchanger 37 and the low temperature solution heat exchanger 31, and the solution diversion ratio between the high temperature condensing refrigerant solution heat exchanger 36 and the medium temperature solution heat exchanger 32, The temperature of the dilute solution Sw introduced into the intermediate temperature regenerator G2 and the low temperature regenerator G1 can be increased while adjusting the heat exchange amount of each heat exchanger.

図５（ｃ）に示すように直列に配置した中温凝縮冷媒溶液熱交換器３７と高温凝縮冷媒溶液熱交換器３６に対して低温溶液熱交換器３１及び中温溶液熱交換器３２が並列になるように配置した場合は、中温溶液ポンプ１２の吐出側で希溶液Ｓｗが分流した後に低温溶液熱交換器３１及び中温凝縮冷媒溶液熱交換器３７にそれぞれ導入される。低温溶液熱交換器３１に導入された希溶液Ｓｗは低温濃溶液Ｓｈ１（図１、２参照）と熱交換した後に分流し、一部は低温再生器Ｇ１に導入され、残りは中温溶液熱交換器３２に導入されて中温濃溶液Ｓｈ２（図１、２参照）と熱交換する。他方、中温凝縮冷媒溶液熱交換器３７に導入された希溶液Ｓｗは中温凝縮冷媒Ｖｆ２と熱交換した後に高温凝縮冷媒溶液熱交換器３６に導入されて高温凝縮冷媒Ｖｆ３と熱交換する。中温溶液熱交換器３２から導出された希溶液Ｓｗと高温凝縮冷媒溶液熱交換器３６から導出された希溶液Ｓｗとは、合流して中温再生器Ｇ２に導入される。この場合は、中温凝縮冷媒溶液熱交換器３７、高温凝縮冷媒溶液熱交換器３６と低温溶液熱交換器３１、中温溶液熱交換器３２への溶液分流比を調整することができ、各熱交換器の熱交換量を調整しつつ、中温再生器Ｇ２に導入される希溶液Ｓｗの温度を高くすることができる。   As shown in FIG. 5C, the low temperature solution heat exchanger 31 and the medium temperature solution heat exchanger 32 are arranged in parallel with the medium temperature condensed refrigerant solution heat exchanger 37 and the high temperature condensed refrigerant solution heat exchanger 36 arranged in series. In such a case, after diluting the dilute solution Sw on the discharge side of the intermediate temperature solution pump 12, it is introduced into the low temperature solution heat exchanger 31 and the intermediate temperature condensed refrigerant solution heat exchanger 37, respectively. The dilute solution Sw introduced into the low temperature solution heat exchanger 31 is diverted after heat exchange with the low temperature concentrated solution Sh1 (see FIGS. 1 and 2), a part is introduced into the low temperature regenerator G1, and the rest is medium temperature solution heat exchange. It is introduced into the vessel 32 to exchange heat with the medium-temperature concentrated solution Sh2 (see FIGS. 1 and 2). On the other hand, the dilute solution Sw introduced into the intermediate temperature condensed refrigerant solution heat exchanger 37 exchanges heat with the intermediate temperature condensed refrigerant Vf2, and then is introduced into the high temperature condensed refrigerant solution heat exchanger 36 to exchange heat with the high temperature condensed refrigerant Vf3. The dilute solution Sw derived from the intermediate temperature solution heat exchanger 32 and the dilute solution Sw derived from the high-temperature condensed refrigerant solution heat exchanger 36 are merged and introduced into the intermediate temperature regenerator G2. In this case, it is possible to adjust the solution diversion ratio to the medium temperature condensed refrigerant solution heat exchanger 37, the high temperature condensed refrigerant solution heat exchanger 36, the low temperature solution heat exchanger 31, and the medium temperature solution heat exchanger 32, and each heat exchange. The temperature of the dilute solution Sw introduced into the intermediate temperature regenerator G2 can be increased while adjusting the heat exchange amount of the cooler.

図６は、高温再生器へ送液される希溶液で凝縮冷媒から熱回収する溶液系統の部分系統図であり、（ａ）は中温凝縮冷媒溶液熱交換器３７と高温凝縮冷媒溶液熱交換器３６とを直列に配置した部分系統図、（ｂ）は直列に配置した中温凝縮冷媒溶液熱交換器３７と高温凝縮冷媒溶液熱交換器３６に希溶液Ｓｗの一部をそれぞれ導入する構成の部分系統図、（ｃ）は直列に配置した中温凝縮冷媒溶液熱交換器３７と高温凝縮冷媒溶液熱交換器３６を吸収器側の高温溶液熱交換器３３Ａに対して並列に配置した部分系統図である。なお、図６に示す構成の場合は、高温再生器へ送液される希溶液で凝縮冷媒から熱回収するために、凝縮冷媒Ｖｆ３、Ｖｆ２の温度を考慮して、高温溶液熱交換器３３を高温溶液熱交換器３３Ａと高温溶液熱交換器３３Ｂとに２分割している。また、図６においても、吸収冷凍機１、２（図１、２参照）のうち溶液系統の吸収器Ａから各再生器Ｇ１〜Ｇ３への溶液送りラインを示しており、他の構成の図示は省略している。また、図６に示す凝縮冷媒から熱回収を行う場合も、図５に示す場合と同様の高温凝縮冷媒溶液熱交換器３６と、中温凝縮冷媒溶液熱交換器３７とを備えている。   FIG. 6 is a partial system diagram of a solution system in which heat is recovered from the condensed refrigerant with a dilute solution sent to the high-temperature regenerator, and (a) is a medium-temperature condensed refrigerant solution heat exchanger 37 and a high-temperature condensed refrigerant solution heat exchanger. 36 is a partial system diagram in which 36 is arranged in series, and (b) is a part of a configuration in which a part of the dilute solution Sw is introduced into the medium temperature condensed refrigerant solution heat exchanger 37 and the high temperature condensed refrigerant solution heat exchanger 36 arranged in series, respectively. System diagram, (c) is a partial system diagram in which an intermediate temperature condensing refrigerant solution heat exchanger 37 and a high temperature condensing refrigerant solution heat exchanger 36 arranged in series are arranged in parallel to the high temperature solution heat exchanger 33A on the absorber side. is there. In the case of the configuration shown in FIG. 6, in order to recover heat from the condensed refrigerant with a dilute solution sent to the high temperature regenerator, the high temperature solution heat exchanger 33 is installed in consideration of the temperatures of the condensed refrigerants Vf3 and Vf2. The high temperature solution heat exchanger 33A and the high temperature solution heat exchanger 33B are divided into two. FIG. 6 also shows a solution feed line from the absorber A of the solution system to the regenerators G1 to G3 in the absorption refrigerators 1 and 2 (see FIGS. 1 and 2). Is omitted. 6 also includes a high-temperature condensed refrigerant solution heat exchanger 36 and a medium-temperature condensed refrigerant solution heat exchanger 37 similar to those shown in FIG.

図６（ａ）に示すように中温凝縮冷媒溶液熱交換器３７と高温凝縮冷媒溶液熱交換器３６とを直列に配置した場合、吸収器Ａから導出された希溶液Ｓｗはまず高温溶液熱交換器３３Ａで高温濃溶液Ｓｈ３と熱交換した後に中温凝縮冷媒溶液熱交換器３７に導入され、ここで中温凝縮冷媒Ｖｆ２と熱交換して熱回収を行う。さらに希溶液Ｓｗは高温凝縮冷媒溶液熱交換器３６に導入されて高温凝縮冷媒Ｖｆ３と熱交換して熱回収を行い、次いで高温溶液熱交換器３３Ｂに導入されて高温再生器Ｇ３から導出された高温濃溶液Ｓｈ３と熱交換を行った後に高温再生器Ｇ３に導入される。この場合は、高温再生器Ｇ３へ導入される希溶液Ｓｗでより多くの熱を回収することができる。   As shown in FIG. 6A, when the intermediate temperature condensed refrigerant solution heat exchanger 37 and the high temperature condensed refrigerant solution heat exchanger 36 are arranged in series, the dilute solution Sw derived from the absorber A is first subjected to high temperature solution heat exchange. After the heat exchange with the hot concentrated solution Sh3 in the vessel 33A, it is introduced into the intermediate temperature condensed refrigerant solution heat exchanger 37, where heat is exchanged with the intermediate temperature condensed refrigerant Vf2 for heat recovery. Further, the dilute solution Sw is introduced into the high-temperature condensed refrigerant solution heat exchanger 36 to perform heat recovery by exchanging heat with the high-temperature condensed refrigerant Vf3, and then introduced into the high-temperature solution heat exchanger 33B and derived from the high-temperature regenerator G3. After exchanging heat with the hot concentrated solution Sh3, it is introduced into the high temperature regenerator G3. In this case, more heat can be recovered with the dilute solution Sw introduced into the high-temperature regenerator G3.

図６（ｂ）に示すように直列に配置した中温凝縮冷媒溶液熱交換器３７と高温凝縮冷媒溶液熱交換器３６に希溶液Ｓｗの一部をそれぞれ導入する構成の場合、吸収器Ａから導出された希溶液Ｓｗはまず高温溶液熱交換器３３Ａで高温濃溶液Ｓｈ３と熱交換した後に、一部は希溶液管４３Ａを流れて中温凝縮冷媒溶液熱交換器３７に導入され中温凝縮冷媒Ｖｆ２と熱交換を行い、残りは中温凝縮冷媒溶液熱交換器３７をバイパスして、中温凝縮冷媒Ｖｆ２と熱交換を行った希溶液Ｓｗと合流する。その希溶液Ｓｗは一部が希溶液管４３Ｂを流れ高温凝縮冷媒溶液熱交換器３６に導入されて高温凝縮冷媒Ｖｆ３と熱交換を行い、残りは高温凝縮冷媒溶液熱交換器３６をバイパスして、高温凝縮冷媒Ｖｆ３と熱交換を行った希溶液Ｓｗと合流し、次いで高温溶液熱交換器３３Ｂに導入されて高温再生器Ｇ３から導出された高温濃溶液Ｓｈ３と熱交換を行った後に高温再生器Ｇ３に導入される。この場合は、高温凝縮冷媒溶液熱交換器３６及び中温凝縮冷媒溶液熱交換器３７での交換熱量を抑制しつつ熱回収をすることができる。   As shown in FIG. 6B, in the case of a configuration in which a part of the dilute solution Sw is introduced into each of the medium temperature condensed refrigerant solution heat exchanger 37 and the high temperature condensed refrigerant solution heat exchanger 36 arranged in series, it is derived from the absorber A. First, the diluted solution Sw is subjected to heat exchange with the hot concentrated solution Sh3 in the high temperature solution heat exchanger 33A, and then partly flows through the diluted solution pipe 43A and is introduced into the intermediate temperature condensed refrigerant solution heat exchanger 37, and the intermediate temperature condensed refrigerant Vf2. The heat exchange is performed, and the remainder bypasses the intermediate temperature condensed refrigerant solution heat exchanger 37 and merges with the diluted solution Sw that has exchanged heat with the intermediate temperature condensed refrigerant Vf2. Part of the diluted solution Sw flows through the diluted solution tube 43B and is introduced into the high-temperature condensed refrigerant solution heat exchanger 36 to exchange heat with the high-temperature condensed refrigerant solution Vf3, and the rest bypasses the high-temperature condensed refrigerant solution heat exchanger 36. The high temperature condensing refrigerant Vf3 merges with the dilute solution Sw that has undergone heat exchange, and is then introduced into the high temperature solution heat exchanger 33B and heat exchanged with the high temperature concentrated solution Sh3 derived from the high temperature regenerator G3. Introduced into the vessel G3. In this case, heat recovery can be performed while suppressing the amount of exchange heat in the high-temperature condensed refrigerant solution heat exchanger 36 and the intermediate temperature condensed refrigerant solution heat exchanger 37.

図６（ｃ）に示すように直列に配置した中温凝縮冷媒溶液熱交換器３７と高温凝縮冷媒溶液熱交換器３６を吸収器側の高温溶液熱交換器３３Ａに対して並列に配置した場合は、高温溶液ポンプ１３の吐出側で希溶液Ｓｗが分流した後に希溶液導出管４３を介して高温溶液熱交換器３３Ａに及び希溶液管４３Ｃを介して中温凝縮冷媒溶液熱交換器３７にそれぞれ導入される。高温溶液熱交換器３３Ａに導入された希溶液Ｓｗは低温濃溶液Ｓｈ３（図１、２参照）と熱交換し、中温凝縮冷媒溶液熱交換器３７に導入された希溶液Ｓｗは中温凝縮冷媒Ｖｆ２と熱交換した後に高温凝縮冷媒溶液熱交換器３６に導かれて高温凝縮冷媒Ｖｆ３と熱交換し、その後分流した各希溶液Ｓｗは合流する。合流した希溶液Ｓｗは高温溶液熱交換器３３Ｂに導入されて高温再生器Ｇ３から導出された高温濃溶液Ｓｈ３と熱交換を行った後に高温再生器Ｇ３に導入される。この場合は、高温溶液熱交換器３３Ａと中温凝縮冷媒溶液熱交換器３７、高温凝縮冷媒溶液熱交換器３６への溶液分流比を調整することで、各熱交換器の交換熱量を調整しつつ、高温再生器Ｇ３へ導入される希溶液Ｓｗの温度を高くすることができる。   When the medium temperature condensed refrigerant solution heat exchanger 37 and the high temperature condensed refrigerant solution heat exchanger 36 arranged in series as shown in FIG. 6C are arranged in parallel to the absorber high temperature solution heat exchanger 33A After diluting the dilute solution Sw on the discharge side of the high temperature solution pump 13, the dilute solution Sw is introduced into the high temperature solution heat exchanger 33A via the dilute solution outlet tube 43 and into the intermediate temperature condensed refrigerant solution heat exchanger 37 via the dilute solution tube 43C. Is done. The dilute solution Sw introduced into the high temperature solution heat exchanger 33A exchanges heat with the low temperature concentrated solution Sh3 (see FIGS. 1 and 2), and the dilute solution Sw introduced into the intermediate temperature condensed refrigerant solution heat exchanger 37 is changed to the intermediate temperature condensed refrigerant Vf2. After the heat exchange, the dilute solution Sw is introduced into the high-temperature condensing refrigerant solution heat exchanger 36 and exchanged heat with the high-temperature condensing refrigerant Vf3. The merged dilute solution Sw is introduced into the high temperature regenerator G3 after being introduced into the high temperature solution heat exchanger 33B and exchanging heat with the high temperature concentrated solution Sh3 derived from the high temperature regenerator G3. In this case, while adjusting the exchange heat quantity of each heat exchanger by adjusting the solution diversion ratio to the high temperature solution heat exchanger 33A, the medium temperature condensed refrigerant solution heat exchanger 37, and the high temperature condensed refrigerant solution heat exchanger 36, The temperature of the dilute solution Sw introduced into the high temperature regenerator G3 can be increased.

図７は、高温再生器より排出された排ガスから希溶液に熱回収する溶液系統の部分系統図であり、（ａ）は低温溶液熱交換器３１と排ガス溶液熱交換器３５Ａ、及び中温溶液熱交換器３２と排ガス溶液熱交換器３５Ｂ、高温溶液熱交換器３３と排ガス溶液熱交換器３５Ｃをそれぞれ直列に配置した部分系統図、（ｂ）は低温溶液熱交換器３１と排ガス溶液熱交換器３５Ａ、及び中温溶液熱交換器３２と排ガス溶液熱交換器３５Ｂ、高温溶液熱交換器３３と排ガス溶液熱交換器３５Ｃをそれぞれ並列に配置した部分系統図である。なお、図７においても、溶液系統の吸収器Ａから各再生器Ｇ１〜Ｇ３への溶液送りラインを示しており、他の構成の図示は省略している。図７に示すように、高温再生器より排出された排ガスから熱回収を行う場合は、３つの排ガス溶液熱交換器３５Ａ、３５Ｂ、３５Ｃを備えている。排ガス溶液熱交換器３５Ａ、３５Ｂ、３５Ｃは、典型的にはシェルアンドチューブ型熱交換器が用いられるがその他の熱交換器を用いてもよい。   FIG. 7 is a partial system diagram of a solution system that recovers heat from exhaust gas discharged from a high-temperature regenerator into a dilute solution. FIG. 7A shows a low-temperature solution heat exchanger 31, an exhaust gas solution heat exchanger 35A, and a medium-temperature solution heat. Partial system diagram in which the exchanger 32 and the exhaust gas solution heat exchanger 35B, the high temperature solution heat exchanger 33 and the exhaust gas solution heat exchanger 35C are respectively arranged in series, (b) is the low temperature solution heat exchanger 31 and the exhaust gas solution heat exchanger. 35A is a partial system diagram in which an intermediate temperature solution heat exchanger 32 and an exhaust gas solution heat exchanger 35B, and a high temperature solution heat exchanger 33 and an exhaust gas solution heat exchanger 35C are arranged in parallel, respectively. Also in FIG. 7, the solution feed line from the absorber A of the solution system to each of the regenerators G1 to G3 is shown, and the other components are not shown. As shown in FIG. 7, when heat recovery is performed from the exhaust gas discharged from the high-temperature regenerator, three exhaust gas solution heat exchangers 35A, 35B, and 35C are provided. As the exhaust gas solution heat exchangers 35A, 35B, and 35C, a shell-and-tube heat exchanger is typically used, but other heat exchangers may be used.

図７（ａ）に示すように低温溶液熱交換器３１と排ガス溶液熱交換器３５Ａ、及び中温溶液熱交換器３２と排ガス溶液熱交換器３５Ｂ、高温溶液熱交換器３３と排ガス溶液熱交換器３５Ｃをそれぞれ直列に配置した場合は、高温再生器Ｇ３から排出された排ガスｅはまず排ガス溶液熱交換器３５Ｃで高温溶液熱交換器３３を通過した希溶液Ｓｗと熱交換を行う。排ガス溶液熱交換器３５Ｃから導出された排ガスｅは、次に排ガス溶液熱交換器３５Ｂで中温溶液熱交換器３２を通過した希溶液Ｓｗと熱交換を行う。排ガス溶液熱交換器３５Ｂから導出された排ガスｅは、次に排ガス溶液熱交換器３５Ａで低温溶液熱交換器３１を通過した希溶液Ｓｗと熱交換を行う。この場合は、高温再生器Ｇ３及び中温再生器Ｇ２、低温再生器Ｇ１に導入される希溶液Ｓｗの温度を高くすることができる。   As shown in FIG. 7 (a), the low temperature solution heat exchanger 31 and the exhaust gas solution heat exchanger 35A, the intermediate temperature solution heat exchanger 32 and the exhaust gas solution heat exchanger 35B, the high temperature solution heat exchanger 33 and the exhaust gas solution heat exchanger. When 35C is arranged in series, the exhaust gas e discharged from the high-temperature regenerator G3 first exchanges heat with the dilute solution Sw that has passed through the high-temperature solution heat exchanger 33 in the exhaust gas solution heat exchanger 35C. The exhaust gas e derived from the exhaust gas solution heat exchanger 35C then performs heat exchange with the dilute solution Sw that has passed through the intermediate temperature solution heat exchanger 32 in the exhaust gas solution heat exchanger 35B. The exhaust gas e derived from the exhaust gas solution heat exchanger 35B then exchanges heat with the dilute solution Sw that has passed through the low temperature solution heat exchanger 31 in the exhaust gas solution heat exchanger 35A. In this case, the temperature of the dilute solution Sw introduced into the high temperature regenerator G3, the medium temperature regenerator G2, and the low temperature regenerator G1 can be increased.

図７（ｂ）に示すように低温溶液熱交換器３１と排ガス溶液熱交換器３５Ａ、及び中温溶液熱交換器３２と排ガス溶液熱交換器３５Ｂ、高温溶液熱交換器３３と排ガス溶液熱交換器３５Ｃをそれぞれ並列に配置した場合は、高温溶液ポンプ１３吐出側で希溶液Ｓｗが分流し、その一部は高温溶液熱交換器３３で高温濃溶液Ｓｈ３と熱交換した後に高温再生器Ｇ３に導入され、残りは希溶液管４３Ｄを流れ高温溶液熱交換器３３をバイパスして排ガス溶液熱交換器３５Ｃに導かれて高温再生器Ｇ３から排出された排ガスｅと熱交換した後に高温再生器Ｇ３に導入される。排ガス溶液熱交換器３５Ｃから導出された排ガスｅは、次に低温溶液熱交換器３１を通過した後に分流して希溶液管４２Ｄを流れ中温溶液熱交換器３２をバイパスした希溶液Ｓｗと排ガス溶液熱交換器３５Ｂで熱交換をする。低温溶液熱交換器３１を通過した後に分流した希溶液Ｓｗの残りの一部は希溶液管４１を流れてそのまま低温再生器Ｇ１に導入され、他の残りの希溶液Ｓｗは中温溶液熱交換器３２に導かれて中温濃溶液Ｓｈ２と熱交換した後に中温再生器Ｇ２に導入される。低温溶液熱交換器３１へ導入される希溶液Ｓｗは、中温溶液ポンプ１２の吐出側で分流した一部であり、中温溶液ポンプ１２の吐出側で分流した残りの希溶液Ｓｗは希溶液管４１Ｄを流れて排ガス溶液熱交換器３５Ａに導かれ、排ガス溶液熱交換器３５Ｂから導出された排ガスｅと熱交換を行った後に低温再生器Ｇ１に導入される。この場合は、各溶液熱交換器３１、３２、３３とこれらに並列に設置される排ガス溶液熱交換器３５Ａ、３５Ｂ、３５Ｃとの溶液分流比を調整することで、各熱交換器３１、３２、３３、３５Ａ、３５Ｂ、３５Ｃの熱交換量を調整しつつ、各再生器Ｇ１〜Ｇ３へ導入される希溶液Ｓｗの温度を高くすることができる。   As shown in FIG. 7B, the low temperature solution heat exchanger 31 and the exhaust gas solution heat exchanger 35A, the intermediate temperature solution heat exchanger 32 and the exhaust gas solution heat exchanger 35B, the high temperature solution heat exchanger 33 and the exhaust gas solution heat exchanger. When 35C are arranged in parallel, the dilute solution Sw is diverted on the discharge side of the high temperature solution pump 13, and a part thereof is exchanged with the high temperature concentrated solution Sh3 by the high temperature solution heat exchanger 33 and then introduced into the high temperature regenerator G3. The remainder flows through the dilute solution pipe 43D, bypasses the high temperature solution heat exchanger 33, is guided to the exhaust gas solution heat exchanger 35C, and exchanges heat with the exhaust gas e discharged from the high temperature regenerator G3, and then enters the high temperature regenerator G3. be introduced. Exhaust gas e derived from the exhaust gas solution heat exchanger 35C then passes through the low-temperature solution heat exchanger 31 and then diverts to flow through the dilute solution pipe 42D and the dilute solution Sw and the exhaust gas solution bypassing the intermediate temperature solution heat exchanger 32. Heat exchange is performed by the heat exchanger 35B. The remaining part of the dilute solution Sw that has been branched after passing through the low temperature solution heat exchanger 31 flows through the dilute solution tube 41 and is introduced as it is into the low temperature regenerator G1, while the other remaining dilute solution Sw is the intermediate temperature solution heat exchanger. After being led to 32 and exchanging heat with the medium temperature concentrated solution Sh2, it is introduced into the medium temperature regenerator G2. The dilute solution Sw introduced into the low temperature solution heat exchanger 31 is a part of the diverted solution on the discharge side of the intermediate temperature solution pump 12, and the remaining dilute solution Sw divided on the discharge side of the intermediate temperature solution pump 12 is diluted solution tube 41D. And is introduced into the low temperature regenerator G1 after exchanging heat with the exhaust gas e derived from the exhaust gas solution heat exchanger 35B. In this case, each heat exchanger 31, 32, 33 is adjusted by adjusting the solution diversion ratio between the solution heat exchangers 31, 32, 33 and the exhaust gas solution heat exchangers 35A, 35B, 35C installed in parallel therewith. , 33, 35 </ b> A, 35 </ b> B, and 35 </ b> C can be adjusted while increasing the temperature of the dilute solution Sw introduced into the regenerators G <b> 1 to G <b> 3.

なお、図５〜図７において説明した、中温再生器Ｇ２のドレンＶｆ３や低温再生器Ｇ１のドレンＶｆ２と希溶液Ｓｗとの熱交換による熱回収、及び高温再生器Ｇ３’からの排ガスと希溶液Ｓｗとの熱交換による熱回収で用いる各熱交換器３６、３７、３５Ａ〜３５Ｃのうちで設置する熱交換器は、必ずしも図示したすべてを備えている必要はなく、吸収冷凍機の作動条件により適宜選定して配設してもよい。   5 to 7, the heat recovery by heat exchange between the drain Vf3 of the intermediate temperature regenerator G2 or the drain Vf2 of the low temperature regenerator G1 and the dilute solution Sw, and the exhaust gas and the dilute solution from the high temperature regenerator G3 ′. The heat exchangers installed among the heat exchangers 36, 37, 35A to 35C used for heat recovery by heat exchange with Sw do not necessarily need to include all of the illustrated ones, depending on the operating conditions of the absorption refrigerator. You may select and arrange | position suitably.

（フラッシュチャンバーの追加）
上述の各三重効用吸収冷凍機において、吸収器Ａに導入される高温濃溶液Ｓｈ３と、低温濃溶液Ｓｈ１と中温濃溶液Ｓｈ２とが混合した濃溶液との合流部にフラッシュチャンバーを設置してもよい。吸収冷凍機の運転条件により、低温濃溶液Ｓｈ１と中温濃溶液Ｓｈ２とが混合した濃溶液の飽和圧力よりも高温濃溶液Ｓｈ３の飽和圧力の方が高い場合は、これらが合流したときに高温濃溶液Ｓｈ３の圧力低下に伴って、さらに冷媒蒸気が発生する。合流部で発生する冷媒蒸気の量が多い場合には配管内で腐食等の不具合が生じるおそれがあるため、フラッシュチャンバーを設置して冷媒蒸気の再蒸発による影響を緩和させるとよい。また、フラッシュチャンバーの上部に、低温再生器Ｇ１又は凝縮器Ｃへと導く配管を接続し、フラッシュチャンバーで発生した冷媒蒸気を低温再生器Ｇ１又は凝縮器Ｃへ送るようにしてもよい。 (Addition of flash chamber)
In each of the above triple effect absorption refrigerators, even if a flash chamber is installed at the junction of the high temperature concentrated solution Sh3 introduced into the absorber A and the concentrated solution obtained by mixing the low temperature concentrated solution Sh1 and the intermediate temperature concentrated solution Sh2. Good. If the saturation pressure of the hot concentrated solution Sh3 is higher than the saturated pressure of the concentrated solution in which the low temperature concentrated solution Sh1 and the middle temperature concentrated solution Sh2 are mixed due to the operating conditions of the absorption refrigerator, As the pressure of the solution Sh3 decreases, further refrigerant vapor is generated. When there is a large amount of refrigerant vapor generated at the junction, there is a risk of problems such as corrosion occurring in the pipe. Therefore, it is advisable to install a flash chamber to mitigate the effects of refrigerant vapor re-evaporation. Further, a pipe leading to the low temperature regenerator G1 or the condenser C may be connected to the upper part of the flash chamber, and the refrigerant vapor generated in the flash chamber may be sent to the low temperature regenerator G1 or the condenser C.

（流量調整手段の追加）
また、高温溶液熱交換器３３の下流側の高温濃溶液導出管４６、及び中温溶液熱交換器３２の下流側で低温濃溶液導出管４４に接続する前の中温濃溶液導出管４５のそれぞれに、電動弁等の流量調整手段（不図示）を設けてもよい。典型的には、高温溶液ポンプ１３による高温再生器Ｇ３への溶液の供給量は高温濃溶液導出管４６の抵抗によって決まる高温濃溶液Ｓｈ３の導出量により決定され、中温溶液ポンプ１２による中温再生器Ｇ２への溶液の供給量は中温濃溶液導出管４５の抵抗によって決まる中温濃溶液Ｓｈ２の導出量により決定されるが、これらは吸収冷凍機の定格運転条件を基準として決定されているため、部分負荷条件ではサイクル効率を最適にする溶液の供給量にはならない。そのため、上述の位置に電動弁等の流量調整手段を設け、冷凍負荷に応じた溶液量を供給できるようにしてもよい。電動弁等の流量調整手段は、典型的には制御装置６０と信号ケーブルで接続され、制御装置６０からの信号を受信して作動するように構成される。また、吸収冷凍機の起動直後や冷凍負荷が小さいとき、あるいは冷却水温度が低いとき等の、溶液ポンプ１２、１３の最低回転速度の運転時でも各再生器Ｇ１〜Ｇ３への溶液供給が過剰になる場合は、電動弁等の流量調整手段を制御して（電動弁の場合は開いて）過剰になる分の溶液を吸収器Ａへ戻すようにしてもよい。 (Addition of flow rate adjustment means)
Further, a high temperature concentrated solution outlet pipe 46 on the downstream side of the high temperature solution heat exchanger 33 and a middle temperature concentrated solution outlet pipe 45 before being connected to the low temperature concentrated solution outlet pipe 44 on the downstream side of the intermediate temperature solution heat exchanger 32, respectively. A flow rate adjusting means (not shown) such as an electric valve may be provided. Typically, the supply amount of the solution to the high temperature regenerator G3 by the high temperature solution pump 13 is determined by the derived amount of the high temperature concentrated solution Sh3 determined by the resistance of the high temperature concentrated solution outlet pipe 46, and the intermediate temperature regenerator by the intermediate temperature solution pump 12 is determined. The supply amount of the solution to G2 is determined by the derived amount of the medium-temperature concentrated solution Sh2 determined by the resistance of the medium-temperature concentrated solution outlet tube 45. However, since these are determined based on the rated operating conditions of the absorption refrigerator, The load conditions do not result in a solution supply that optimizes cycle efficiency. Therefore, a flow rate adjusting means such as an electric valve may be provided at the above position so that a solution amount corresponding to the refrigeration load can be supplied. The flow rate adjusting means such as an electric valve is typically connected to the control device 60 via a signal cable, and is configured to operate by receiving a signal from the control device 60. Also, the solution supply to the regenerators G1 to G3 is excessive even during operation at the minimum rotation speed of the solution pumps 12 and 13, such as immediately after the start of the absorption refrigerator, when the refrigeration load is small, or when the cooling water temperature is low. In such a case, an excess amount of solution may be returned to the absorber A by controlling a flow rate adjusting means such as a motorized valve (open in the case of a motorized valve).

（低温再生器への溶液フロー）
以上の説明では、吸収器Ａの希溶液Ｓｗを、中温溶液ポンプ１２で中温再生器Ｇ２及び低温再生器Ｇ１へ並列に送ることとしたが、まず希溶液Ｓｗをすべて中温再生器Ｇ２へ送り、中温再生器Ｇ２から導出される中温濃溶液Ｓｈ２を低温再生器Ｇ１へ導くようにしてもよい。また、吸収器Ａの希溶液Ｓｗを、高温溶液ポンプ１３で高温再生器Ｇ３へ送り、中温溶液ポンプ１２で中温再生器Ｇ２及び低温再生器Ｇ１へ送ることとしたが、高温溶液ポンプ１３で高温再生器Ｇ３及び低温再生器Ｇ１へ送り、中温溶液ポンプ１２で中温再生器Ｇ２へ送ってもよい。 (Solution flow to low temperature regenerator)
In the above description, the dilute solution Sw of the absorber A is sent in parallel to the intermediate temperature regenerator G2 and the low temperature regenerator G1 by the intermediate temperature solution pump 12. First, all of the dilute solution Sw is sent to the intermediate temperature regenerator G2. The medium temperature concentrated solution Sh2 derived from the medium temperature regenerator G2 may be guided to the low temperature regenerator G1. Further, the dilute solution Sw of the absorber A is sent to the high temperature regenerator G3 by the high temperature solution pump 13, and is sent to the medium temperature regenerator G2 and the low temperature regenerator G1 by the medium temperature solution pump 12. It may be sent to the regenerator G3 and the low temperature regenerator G1 and sent to the intermediate temperature regenerator G2 by the intermediate temperature solution pump 12.

本発明の実施の形態に係る三重効用吸収冷凍機を示す模式的系統図である。1 is a schematic system diagram showing a triple effect absorption refrigerator according to an embodiment of the present invention. 本発明の実施の形態に係る三重効用吸収冷凍機の変形例を示す模式的系統図である。It is a typical systematic diagram which shows the modification of the triple effect absorption refrigerator which concerns on embodiment of this invention. 吸収器及び蒸発器を多段とした三重効用吸収冷凍機を示す部分系統図である。It is a partial systematic diagram which shows the triple effect absorption refrigerator which made the absorber and the evaporator multistage. 貫流ボイラとした高温再生器の図である。（ａ）は縦断面図、（ｂ）は缶胴部分の平面図である。It is a figure of the high temperature regenerator made into the once-through boiler. (A) is a longitudinal cross-sectional view, (b) is a plan view of a can body portion. 中温再生器及び低温再生器へ送液される希溶液で凝縮冷媒から熱回収する溶液系統の部分系統図である。（ａ）は低温溶液熱交換器と中温凝縮冷媒溶液熱交換器、及び中温溶液熱交換器と高温凝縮冷媒溶液熱交換器をそれぞれ直列に配置した部分系統図、（ｂ）は低温溶液熱交換器と中温凝縮冷媒溶液熱交換器、及び中温溶液熱交換器と高温凝縮冷媒溶液熱交換器をそれぞれ並列に配置した部分系統図、（ｃ）は直列に配置した中温凝縮冷媒溶液熱交換器と高温凝縮冷媒溶液熱交換器に対して低温溶液熱交換器及び中温溶液熱交換器が並列になるように配置した部分系統図である。It is a partial systematic diagram of the solution system | strain which carries out heat recovery from a condensed refrigerant | coolant with the dilute solution sent to an intermediate temperature regenerator and a low temperature regenerator. (A) is a partial system diagram in which a low-temperature solution heat exchanger and a medium-temperature condensing refrigerant solution heat exchanger, and a medium-temperature solution heat exchanger and a high-temperature condensing refrigerant solution heat exchanger are arranged in series, and (b) is a low-temperature solution heat exchange. And a partial system diagram in which the intermediate temperature solution heat exchanger and the high temperature condensation refrigerant solution heat exchanger are respectively arranged in parallel, (c) is an intermediate temperature condensation refrigerant solution heat exchanger arranged in series It is a partial distribution diagram arranged so that a low temperature solution heat exchanger and a middle temperature solution heat exchanger may be arranged in parallel to a high temperature condensation refrigerant solution heat exchanger. 高温再生器へ送液される希溶液で凝縮冷媒から熱回収する溶液系統の部分系統図である。（ａ）は中温凝縮冷媒溶液熱交換器と高温凝縮冷媒溶液熱交換器とを直列に配置した部分系統図、（ｂ）は直列に配置した中温凝縮冷媒溶液熱交換器と高温凝縮冷媒溶液熱交換器に希溶液の一部をそれぞれ導入する構成の部分系統図、（ｃ）は直列に配置した中温凝縮冷媒溶液熱交換器と高温凝縮冷媒溶液熱交換器を吸収器側の高温溶液熱交換器に対して並列に配置した部分系統図である。It is a partial systematic diagram of the solution system | strain which carries out heat recovery from a condensed refrigerant with the dilute solution sent to a high temperature regenerator. (A) is a partial system diagram in which a medium temperature condensed refrigerant solution heat exchanger and a high temperature condensed refrigerant solution heat exchanger are arranged in series, and (b) is an intermediate temperature condensed refrigerant solution heat exchanger and high temperature condensed refrigerant solution heat arranged in series. Partial system diagram of a configuration in which a part of a dilute solution is introduced into the exchanger, (c) is a high-temperature solution heat exchange on the absorber side of the intermediate-temperature condensed refrigerant solution heat exchanger and the high-temperature condensed refrigerant solution heat exchanger arranged in series It is the partial systematic diagram arrange | positioned in parallel with respect to the vessel. 高温再生器より排出された排ガスから希溶液に熱回収する溶液系統の部分系統図である。（ａ）は低温溶液熱交換器と排ガス溶液熱交換器、及び中温溶液熱交換器と排ガス溶液熱交換器、高温溶液熱交換器と排ガス溶液熱交換器をそれぞれ直列に配置した部分系統図、（ｂ）は低温溶液熱交換器と排ガス溶液熱交換器、及び中温溶液熱交換器と排ガス溶液熱交換器、高温溶液熱交換器と排ガス溶液熱交換器をそれぞれ並列に配置した部分系統図である。It is a partial systematic diagram of the solution system which carries out heat recovery from the exhaust gas discharged | emitted from the high temperature regenerator to a dilute solution. (A) is a partial system diagram in which a low temperature solution heat exchanger and an exhaust gas solution heat exchanger, an intermediate temperature solution heat exchanger and an exhaust gas solution heat exchanger, a high temperature solution heat exchanger and an exhaust gas solution heat exchanger are arranged in series, (B) is a partial system diagram in which a low temperature solution heat exchanger and an exhaust gas solution heat exchanger, an intermediate temperature solution heat exchanger and an exhaust gas solution heat exchanger, and a high temperature solution heat exchanger and an exhaust gas solution heat exchanger are arranged in parallel, respectively. is there.

符号の説明Explanation of symbols

１、２、３ 三重効用吸収冷凍機
１２ 中温溶液ポンプ
１３ 高温溶液ポンプ
２２ 中温再生器溶液溜まり
２３ 高温再生器溶液溜まり
６０ 制御装置
６２ 中温圧力検知器
６３ 高温圧力検知器
６５Ｈ 高位液面センサー（中温液面検知器）
６５Ｌ 低位液面センサー（中温液面検知器）
６６Ｈ 高位液面センサー（高温液面検知器）
６６Ｌ 低位液面センサー（高温液面検知器）
６８ 中温冷媒温度検知器
６９ 高温冷媒温度検知器
Ａ 吸収器
Ｃ 凝縮器
Ｅ 蒸発器
Ｇ１ 低温再生器
Ｇ２ 中温再生器
Ｇ３ 高温再生器
Ｓ 溶液
Ｓｗ 希溶液
Ｓｈ２ 中温濃溶液
Ｓｈ３ 高温濃溶液
Ｖｓ 冷媒蒸気 1, 2, 3 Triple effect absorption refrigerator 12 Medium temperature solution pump 13 High temperature solution pump 22 Medium temperature regenerator solution reservoir 23 High temperature regenerator solution reservoir 60 Controller 62 Medium temperature pressure detector 63 High temperature pressure detector 65H High liquid level sensor (medium temperature) Liquid level detector)
65L Low level sensor (Medium temperature level detector)
66H High liquid level sensor (High temperature liquid level detector)
66L Low level sensor (High temperature level detector)
68 Medium temperature refrigerant temperature detector 69 High temperature refrigerant temperature detector A Absorber C Condenser E Evaporator G1 Low temperature regenerator G2 Medium temperature regenerator G3 High temperature regenerator S Solution Sw Dilute solution Sh2 Medium temperature concentrated solution Sh3 High temperature concentrated solution Vs Refrigerant vapor

Claims (4)

冷媒蒸気を溶液で吸収し、前記溶液を濃度が低下した希溶液とする吸収器と；
前記吸収器から前記希溶液を導入し、前記希溶液を加熱することにより冷媒を蒸発させて濃度を上昇させる低温再生器と；
前記吸収器から前記希溶液を導入し、前記希溶液を加熱することにより前記低温再生器におけるよりも高い温度で冷媒を蒸発させて濃度を上昇させる中温再生器と；
前記吸収器から前記希溶液を導入し、前記希溶液を加熱することにより前記中温再生器におけるよりも高い温度で冷媒を蒸発させて濃度を上昇させる高温再生器と；
前記吸収器から前記希溶液を前記中温再生器に送液する中温溶液ポンプと；
前記吸収器から前記希溶液を前記高温再生器に送液する、前記中温溶液ポンプとは別の高温溶液ポンプとを備える；
三重効用吸収冷凍機。 An absorber that absorbs the refrigerant vapor with a solution and makes the solution a dilute solution with reduced concentration;
A low-temperature regenerator that introduces the dilute solution from the absorber and heats the dilute solution to evaporate the refrigerant to increase the concentration;
An intermediate temperature regenerator that introduces the dilute solution from the absorber and heats the dilute solution to evaporate the refrigerant at a higher temperature than in the low temperature regenerator to increase the concentration;
A high temperature regenerator that elevates the concentration by introducing the dilute solution from the absorber and heating the dilute solution to evaporate the refrigerant at a higher temperature than in the intermediate temperature regenerator;
An intermediate temperature solution pump for delivering the dilute solution from the absorber to the intermediate temperature regenerator;
A high-temperature solution pump separate from the intermediate-temperature solution pump for feeding the dilute solution from the absorber to the high-temperature regenerator;
Triple effect absorption refrigerator. 前記高温再生器が、前記希溶液から冷媒を蒸発させて濃度が上昇した高温濃溶液を導出する側に、前記高温濃溶液を溜める高温再生器溶液溜まりを有し；
前記中温再生器が、前記希溶液から冷媒を蒸発させて濃度が上昇した中温濃溶液を導出する側に、前記中温濃溶液を溜める中温再生器溶液溜まりを有し；
前記高温再生器溶液溜まり内もしくは前記高温再生器の本体内の前記高温濃溶液の液面が第１の所定の液面高さになるように前記高温溶液ポンプの吐出量を調節すると共に、前記中温再生器溶液溜まり内もしくは前記中温再生器の本体内の前記中温濃溶液が第２の所定の液面高さになるように前記中温溶液ポンプの吐出量を調節する制御装置を備える；
請求項１に記載の三重効用吸収冷凍機。 The high-temperature regenerator has a high-temperature regenerator solution reservoir for storing the high-temperature concentrated solution on a side of deriving a high-temperature concentrated solution whose concentration has been increased by evaporating a refrigerant from the dilute solution;
The intermediate temperature regenerator has a medium temperature regenerator solution reservoir for storing the intermediate temperature concentrated solution on a side of deriving the intermediate temperature concentrated solution whose concentration has been increased by evaporating the refrigerant from the diluted solution;
Adjusting the discharge amount of the high-temperature solution pump so that the liquid level of the high-temperature concentrated solution in the high-temperature regenerator solution reservoir or in the main body of the high-temperature regenerator is a first predetermined liquid level; A control device for adjusting the discharge amount of the intermediate temperature solution pump so that the intermediate temperature concentrated solution in the intermediate temperature regenerator solution reservoir or the main body of the intermediate temperature regenerator has a second predetermined liquid level;
The triple effect absorption refrigerator according to claim 1. 前記高温再生器内の圧力を検知する高温圧力検知器と；
前記高温再生器溶液溜まり内もしくは前記高温再生器の本体内の前記高温濃溶液の高位液面及び低位液面を検知する高温液面検知器と；
前記中温再生器内の圧力を検知する中温圧力検知器と；
前記中温再生器溶液溜まり内もしくは前記中温再生器の本体内の前記中温濃溶液の高位液面及び低位液面を検知する中温液面検知器とを備え；
前記制御装置が、前記高温溶液ポンプの回転速度を、前記高温圧力検知器で検知した圧力に基づいて調節しつつ前記高温液面検知器が前記高位液面を検知したときに低下させ前記低位液面を検知したときに上昇させると共に、前記中温溶液ポンプの回転速度を、前記中温圧力検知器で検知した圧力に基づいて調節しつつ前記中温液面検知器が前記高位液面を検知したときに低下させ前記低位液面を検知したときに上昇させるように構成された；
請求項２に記載の三重効用吸収冷凍機。 A high temperature pressure detector for detecting the pressure in the high temperature regenerator;
A high temperature liquid level detector for detecting a high liquid level and a low liquid level of the high temperature concentrated solution in the high temperature regenerator solution reservoir or in the main body of the high temperature regenerator;
An intermediate temperature pressure detector for detecting the pressure in the intermediate temperature regenerator;
An intermediate temperature liquid level detector for detecting a high level liquid level and a low level liquid level of the medium temperature concentrated solution in the intermediate temperature regenerator solution reservoir or in the main body of the intermediate temperature regenerator;
The control device adjusts the rotational speed of the high-temperature solution pump based on the pressure detected by the high-temperature pressure detector, and decreases the low-level liquid when the high-temperature liquid level detector detects the high-level liquid level. When the surface temperature is detected, the intermediate temperature liquid level detector detects the higher liquid level while adjusting the rotation speed of the intermediate temperature solution pump based on the pressure detected by the intermediate temperature pressure detector. Configured to be lowered and raised when the lower liquid level is detected;
The triple effect absorption refrigerator according to claim 2. 前記高温圧力検知器に代えて、前記高温再生器内の希溶液を加熱して蒸発した冷媒が凝縮した高温凝縮冷媒の温度を検知する高温冷媒温度検知器を備え；
前記中温圧力検知器に代えて、前記中温再生器内の希溶液を加熱して蒸発した冷媒が凝縮した中温凝縮冷媒の温度を検知する中温冷媒温度検知器を備え；
前記制御装置が、前記高温圧力検知器で検知した圧力に代えて前記高温冷媒温度検知器で検知した温度に基づいて前記高温溶液ポンプの回転速度を調節し、前記中温圧力検知器で検知した圧力に代えて前記中温冷媒温度検知器で検知した温度に基づいて前記中温溶液ポンプの回転速度を調節するように構成された；
請求項３に記載の三重効用吸収冷凍機。
In place of the high-temperature pressure detector, a high-temperature refrigerant temperature detector that detects the temperature of the high-temperature condensed refrigerant in which the refrigerant evaporated by heating the diluted solution in the high-temperature regenerator is condensed;
In place of the intermediate temperature pressure detector, an intermediate temperature refrigerant temperature detector that detects the temperature of the intermediate temperature condensed refrigerant obtained by condensing the refrigerant evaporated by heating the diluted solution in the intermediate temperature regenerator;
The control device adjusts the rotational speed of the high temperature solution pump based on the temperature detected by the high temperature refrigerant temperature detector instead of the pressure detected by the high temperature pressure detector, and the pressure detected by the intermediate temperature pressure detector. Instead of the medium temperature refrigerant temperature detector is configured to adjust the rotational speed of the medium temperature solution pump based on the temperature detected by the medium temperature refrigerant temperature detector;
The triple effect absorption refrigerator according to claim 3.
JP2005260647A 2005-09-08 2005-09-08 Triple-effect absorption refrigerating machine Pending JP2007071475A (en)

Priority Applications (2)

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JP2005260647A JP2007071475A (en) 2005-09-08 2005-09-08 Triple-effect absorption refrigerating machine
CNB2006101291048A CN100549562C (en) 2005-09-08 2006-09-08 The absorption refrigerating machine of triple function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013160399A (en) * 2012-02-01 2013-08-19 Kawasaki Thermal Engineering Co Ltd Control operation method of absorption refrigerating machine
KR20150007131A (en) * 2013-07-10 2015-01-20 엘지전자 주식회사 Absoption chiller
CN104457011A (en) * 2013-09-20 2015-03-25 荏原冷热***株式会社 Absorption-type refrigeration machine

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JPH11257776A (en) * 1998-03-13 1999-09-24 Osaka Gas Co Ltd Multiple-effect absorption type refrigerator
JP2000171123A (en) * 1998-12-03 2000-06-23 Ebara Corp Triple-effect absorption refrigerating machine
JP2005061652A (en) * 2003-08-20 2005-03-10 Hitachi Ltd Absorption refrigerating machine

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Publication number Priority date Publication date Assignee Title
JPH0384371A (en) * 1989-08-24 1991-04-09 Sanyo Electric Co Ltd Double effective absorption refrigerator
JPH11257776A (en) * 1998-03-13 1999-09-24 Osaka Gas Co Ltd Multiple-effect absorption type refrigerator
JP2000171123A (en) * 1998-12-03 2000-06-23 Ebara Corp Triple-effect absorption refrigerating machine
JP2005061652A (en) * 2003-08-20 2005-03-10 Hitachi Ltd Absorption refrigerating machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013160399A (en) * 2012-02-01 2013-08-19 Kawasaki Thermal Engineering Co Ltd Control operation method of absorption refrigerating machine
KR20150007131A (en) * 2013-07-10 2015-01-20 엘지전자 주식회사 Absoption chiller
KR102165443B1 (en) 2013-07-10 2020-10-14 엘지전자 주식회사 Absoption chiller
CN104457011A (en) * 2013-09-20 2015-03-25 荏原冷热***株式会社 Absorption-type refrigeration machine

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