JP5598909B2 - Exhaust heat absorption chiller / heater and its drain water generation prevention method - Google Patents

Exhaust heat absorption chiller / heater and its drain water generation prevention method Download PDF

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JP5598909B2
JP5598909B2 JP2010121998A JP2010121998A JP5598909B2 JP 5598909 B2 JP5598909 B2 JP 5598909B2 JP 2010121998 A JP2010121998 A JP 2010121998A JP 2010121998 A JP2010121998 A JP 2010121998A JP 5598909 B2 JP5598909 B2 JP 5598909B2
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temperature
regenerator
burner
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heat
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朗 畑山
惇 工藤
篤 海老澤
恒仁 百瀬
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Sanyo Electric Co Ltd
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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
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • 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
    • Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Description

本発明は、バーナでの加熱とは別に排熱での加熱を行うことができる排熱利用式吸収冷温水機に係り、特に排ガスドレイン水の発生を防止することができる排熱利用式吸収冷温水機及びそのドレイン水発生防止方法に関するものである。   The present invention relates to an exhaust heat utilization type absorption chiller / heater capable of performing heating with exhaust heat separately from heating with a burner, and particularly, an exhaust heat utilization type absorption chiller / heater capable of preventing generation of exhaust gas drain water. The present invention relates to a water machine and a method for preventing the generation of drain water.

吸収冷温水機には各種のタイプのものが提案され開発されており、例えば図４に示すような、再生器をガスなどの燃料を用いて直火で加熱させるバーナ式のものが知られている（例えば、特許文献１参照）。
即ち、この吸収冷温水機１００は、ガスバーナ１０１Ｂを備えた高温再生器１０１と、低温再生器１０２と、凝縮器１０３と、蒸発器１０４と、吸収器１０５と、低温熱交換器１０６と、高温熱交換器１０７と、吸収液管１０８〜１１１と、途中に伝熱管１０５Ａおよび伝熱管１０３Ａを備え、冷却水が循環する冷却水配管１１２と、吸収液ポンプ１１３と、冷媒配管１１４〜１１８と、冷媒ポンプ１１９と、図示しない室内ユニットに循環供給する冷水または温水が流れ、途中に伝熱管１０４Ａを備えた冷温水配管１２２と、ガスバーナ１０１Ｂに接続されたガス供給管１２４と、ガス供給管１２４の途中に設けられてガスバーナ１０１Ｂに供給するガス量を制御し、発熱量すなわち高温再生器１０１に投入する熱量を制御する入熱制御弁１２５と、この入熱制御弁の開度を調節するための制御弁モータ１２６と、開閉弁１２７〜１２９などを備えたものである。 Various types of absorption chiller / heater have been proposed and developed. For example, as shown in FIG. 4, a burner type is known in which a regenerator is heated by a direct fire using a fuel such as gas. (For example, refer to Patent Document 1).
That is, the absorption chiller / heater 100 includes a high temperature regenerator 101 including a gas burner 101B, a low temperature regenerator 102, a condenser 103, an evaporator 104, an absorber 105, a low temperature heat exchanger 106, A heat exchanger 107, absorption liquid pipes 108 to 111, a heat transfer pipe 105A and a heat transfer pipe 103A on the way, a cooling water pipe 112 through which cooling water circulates, an absorption liquid pump 113, refrigerant pipes 114 to 118, Cold water or hot water circulatingly supplied to the refrigerant pump 119, an indoor unit (not shown) flows, a cold / hot water pipe 122 provided with a heat transfer pipe 104A in the middle, a gas supply pipe 124 connected to the gas burner 101B, and a gas supply pipe 124 A heat input control valve that is provided in the middle and controls the amount of gas supplied to the gas burner 101B to control the amount of heat generated, that is, the amount of heat input to the high temperature regenerator 101. 25, a control valve motor 126 for regulating the opening degree of the heat input control valve, in which with a opening and closing valve 127 to 129.

また、近年、発電所やごみ焼却場などの排温水を熱源として利用したコジェネレーションタイプのものも提案されている（例えば、特許文献２参照）。
即ち、図５に示すように、この排熱利用吸収冷温水機２００は、配管３００，３０１によって発電モジュール４００と接続されており、この発電モジュール４００に備えた図示外のエンジンの冷却水と熱交換した高温水を吸収液加熱手段２１０へ導入して吸収冷温水機２００´の吸収液と熱交換し、さらにエンジンの排気ガスを補助溶液加熱手段２２０へ導入して上記吸収液と熱交換する。この吸収冷温水機２００´の省エネを目的とする運転時には、第１の熱源として排気ガスを用い、その熱量で不足の時は高温水を用い、さらに不足の時は燃焼室２３０内でバーナ２４０によって燃料を燃焼させることにより、高温再生器（図略）への入熱を行う。 In recent years, a cogeneration type that uses waste water from a power plant or a garbage incineration plant as a heat source has also been proposed (for example, see Patent Document 2).
That is, as shown in FIG. 5, the exhaust heat utilization absorption chiller / heater 200 is connected to the power generation module 400 by pipes 300 and 301, and the cooling water and heat of the engine (not shown) included in the power generation module 400 are provided. The exchanged high-temperature water is introduced into the absorption liquid heating means 210 to exchange heat with the absorption liquid in the absorption chiller / heater 200 ', and the engine exhaust gas is introduced into the auxiliary solution heating means 220 to exchange heat with the absorption liquid. . When the absorption chiller / heater 200 ′ is operated for energy saving, exhaust gas is used as the first heat source. When the amount of heat is insufficient, high-temperature water is used. When the amount of heat is insufficient, the burner 240 is used in the combustion chamber 230. The fuel is burned by the above, and heat is input to the high-temperature regenerator (not shown).

特開２００２−１５６１６９号公報JP 2002-156169 A 特開平１１−１４１８６号公報Japanese Patent Laid-Open No. 11-14186

ところで、このような吸収冷温水機にあっては、高温再生器の加熱手段であるバーナを用いて運転動作を行う際に、燃焼時に発生する排気ガスの温度が露点以下に低下すると凝縮し、ドレイン水が形成される。ところが、高温再生器のバーナの燃料の中に硫黄や窒素などが含まれていると、ドレイン水と反応して、硫酸や硝酸などの強酸が生成される虞がある。そして、このような強酸が排気管に付着すると、管の腐食などをもたらす。   By the way, in such an absorption chiller / heater, when performing an operation using a burner that is a heating means of a high-temperature regenerator, condensation occurs when the temperature of exhaust gas generated during combustion falls below the dew point, Drain water is formed. However, if the fuel of the burner of the high-temperature regenerator contains sulfur or nitrogen, there is a possibility that strong acid such as sulfuric acid or nitric acid is generated by reacting with the drain water. When such strong acid adheres to the exhaust pipe, it causes corrosion of the pipe.

このような事態を防止するには、例えば燃料中の硫黄分や窒素分などの不純物を除去するか、ドレイン水の形成を防止することが効果的であるが、前者のような不純物の除去は現実には非常に困難である。一方、後者の方は、露点以下に高温再生器内部や排気管内部が露点以下に温度が下がらないようにするのが効果的であるが、運転開始時点には季節によっては吸収液や外気温が低い場合が多いため、有効な対策が切望されていた。   In order to prevent such a situation, it is effective to remove impurities such as sulfur and nitrogen in the fuel or to prevent the formation of drain water. In reality it is very difficult. On the other hand, the latter is effective to prevent the temperature inside the high-temperature regenerator and exhaust pipe from dropping below the dew point below the dew point. In many cases, the effective measure is eagerly desired.

そこで、高温再生器や排気管をステンレスなどの耐強酸性材料で形成したり、中和装置を付設することも検討されているが、いずれも、費用が嵩むといった問題点を有している。   Therefore, it has been studied to form a high-temperature regenerator or an exhaust pipe with a strong acid-resistant material such as stainless steel, or to add a neutralization device, but both have the problem that the cost increases.

そこで、本発明は、上記した事情に鑑み、現状の構造はできるだけそのまま利用して、排ガスドレイン水からの強酸の生成を低コストで回避させることができる、排熱利用式吸収冷温水機及びそのドレイン水発生防止方法を提供することを目的とするものである。   Therefore, in view of the above-described circumstances, the present invention uses an existing heat structure as it is as much as possible, and can avoid generation of strong acid from exhaust gas drain water at low cost, and an exhaust heat utilization type absorption chiller / heater and its It aims at providing the drain water generation | occurrence | production prevention method.

上記した目的を達成するため、
（１）本発明の排熱利用式吸収冷温水機は、
再生器、凝縮器、吸収器、蒸発器、及び熱交換器を備えるとともに、これらの間を配管接続して設けた吸収冷温水機を、前記再生器に設けた直火バーナによる燃焼装置でバーナ運転し、かつ、前記吸収器から送り込まれる吸収液を補助熱源の排熱で動作する補助再生器で加熱する排熱運転可能に構成し、前記補助再生器で加熱された吸収液が前記バーナ運転時に運転するポンプを介して前記再生器に送り込まれる排熱利用式吸収冷温水機であって、
前記再生器内部の温度を検出する再生器温度検出手段と制御手段とを備え、
前記制御手段は、前記温度検出手段で検出する温度が少なくとも所定の基準温度を上回るまで、前記ポンプを停止し前記再生器への吸収液の流入を一時的に阻止して前記排熱運転のみを行い、前記検出温度が基準温度を上回ると、前記バーナを点火させて前記バーナ運転を行うよう前記バーナ運転に優先して前記排熱運転を行い、
前記バーナ運転では前記ポンプの運転により、前記補助再生器で加熱された吸収液が、前記再生器で生成された中間吸収液が通る高温熱交換器と前記燃焼装置の排ガス管の一部に設けた熱交換器とを通過し、前記排ガスからドレン水が生成されない温度以上に加熱されて前記再生器へ流入することを特徴とする。 To achieve the above objectives,
(1) The exhaust heat utilization type absorption chiller / heater of the present invention is
A regenerator, a condenser, an absorber, an evaporator, and a heat exchanger, and an absorption chiller / heater provided by connecting a pipe between them, is a burner by a combustion device using a direct fire burner provided in the regenerator. It is configured to be capable of exhaust heat operation that is operated and heated by an auxiliary regenerator that operates with the exhaust heat of the auxiliary heat source, and the absorbent heated by the auxiliary regenerator is operated in the burner operation. An exhaust heat utilizing absorption chiller / heater that is fed into the regenerator via a pump that is sometimes operated ,
Regenerator temperature detecting means for detecting the temperature inside the regenerator and control means,
The control means stops the pump until the temperature detected by the temperature detection means exceeds at least a predetermined reference temperature, and temporarily prevents the absorption liquid from flowing into the regenerator and performs only the exhaust heat operation. When the detected temperature exceeds a reference temperature, the exhaust heat operation is performed in preference to the burner operation so that the burner operation is performed by igniting the burner,
In the burner operation, due to the operation of the pump, the absorption liquid heated by the auxiliary regenerator is provided in a high temperature heat exchanger through which the intermediate absorption liquid generated by the regenerator passes and a part of the exhaust pipe of the combustion device. And the heat exchanger is heated to a temperature at which drain water is not generated from the exhaust gas and flows into the regenerator .

（２）また、本発明の排熱利用式吸収冷温水機は、
再生器、凝縮器、吸収器、蒸発器、及び熱交換器を備えるとともに、これらの間を配管接続して設けた吸収冷温水機を、前記再生器に設けた直火バーナによる燃焼装置でバーナ運転し、かつ、前記吸収器から送り込まれる吸収液を補助熱源の排熱で動作する補助再生器で加熱する排熱運転可能に構成し、前記補助再生器で加熱された吸収液が前記バーナ運転時に運転するポンプを介して前記再生器に送り込まれる排熱利用式吸収冷温水機であって、
前記再生器内部の温度を検出する再生器温度検出手段と、前記吸収器から前記補助再生器へ流れる吸収液の温度を前記吸収器近傍で検出する吸収器温度検出手段と、前記凝縮器及び前記吸収器内の伝熱管へ供給する冷却水の温度を検出する冷却水温度検出手段と、前記各温度検出手段からの温度情報に基づき前記排熱運転及び前記バーナ運転の運転制御を行う制御手段とを備え、
前記制御手段によって、前記各温度検出手段で検出する温度が全てそれに対応する基準温度を上回るまで、前記ポンプを停止し前記再生器への吸収液の流入を阻止して前記排熱運転のみを行い、前記各温度検出手段で検出する温度が全てそれに対応する基準温度を上回ると、前記排熱運転の継続と共に前記バーナ運転を開始し、
前記バーナ運転では前記ポンプの運転により、前記補助再生器で加熱された吸収液が、前記再生器生成された中間吸収液が通る高温熱交換器と前記燃焼装置の排ガス管の一部に設けた熱交換器とを順次通過し前記排ガスからドレン水が生成されない温度以上に加熱されて前記再生器へ流入する管路を流れることを特徴とする。 (2) Moreover, the waste heat utilization type absorption chiller / heater of the present invention is
A regenerator, a condenser, an absorber, an evaporator, and a heat exchanger, and an absorption chiller / heater provided by connecting a pipe between them, is a burner by a combustion device using a direct fire burner provided in the regenerator. It is configured to be capable of exhaust heat operation that is operated and heated by an auxiliary regenerator that operates with the exhaust heat of the auxiliary heat source, and the absorbent heated by the auxiliary regenerator is operated in the burner operation. An exhaust heat utilizing absorption chiller / heater that is fed into the regenerator via a pump that is sometimes operated ,
Regenerator temperature detecting means for detecting the temperature inside the regenerator, absorber temperature detecting means for detecting the temperature of the absorbing liquid flowing from the absorber to the auxiliary regenerator in the vicinity of the absorber, the condenser, and the Cooling water temperature detection means for detecting the temperature of the cooling water supplied to the heat transfer tubes in the absorber, and control means for performing operation control of the exhaust heat operation and the burner operation based on temperature information from each temperature detection means; With
Until the temperature detected by each of the temperature detecting means exceeds the corresponding reference temperature by the control means, the pump is stopped to prevent the absorption liquid from flowing into the regenerator, and only the exhaust heat operation is performed. When the temperatures detected by the respective temperature detection means exceed all corresponding reference temperatures, the burner operation is started together with the continuation of the exhaust heat operation,
In the burner operation, the absorption liquid heated by the auxiliary regenerator is provided in a part of the exhaust gas pipe of the combustion apparatus and the high-temperature heat exchanger through which the intermediate absorption liquid generated by the regenerator passes by the operation of the pump. It is characterized by flowing through a conduit that sequentially passes through a heat exchanger and is heated to a temperature at which drain water is not generated from the exhaust gas and flows into the regenerator .

（３）また、本発明の排熱利用式吸収冷温水機のドレン水発生防止方法は、
再生器、凝縮器、吸収器、蒸発器、及び熱交換器を備えるとともに、これらの間を配管接続して設けた吸収冷温水機を、前記再生器に設けた直火バーナによる燃焼装置でバーナ運転し、かつ、前記吸収器から送り込まれる吸収液を補助熱源の排熱で動作する補助再生器で加熱する排熱運転可能に構成し、前記補助再生器で加熱された吸収液が前記バーナ運転時に運転するポンプを介して前記再生器に送り込まれる排熱利用式吸収冷温水機において、
前記再生器内部の温度を検出する再生器温度検出手段と、前記吸収器から前記補助再生器へ流れる吸収液の温度を検出する吸収器温度検出手段と、前記凝縮器及び前記吸収器内の伝熱管へ供給する冷却水の温度を検出する冷却水温度検出手段とを備え、
運転起動時には、前記各温度検出手段で検出する温度がそれに対応する基準温度よりも高いか否かを判定し、前記各温度検出手段で検出する温度のうち、少なくとも何れかが前記基準温度よりも低い場合には、前記加熱装置のバーナ運転に先立ち前記ポンプを停止し前記排熱運転のみを行い、前記各温度検出手段で検出する温度が全てそれに対応する基準温度を上回ると、前記排熱運転の継続と共に前記バーナ運転を開始し、前記ポンプの運転により前記補助再生器で加熱された吸収液が、前記再生器で生成された中間吸収液が通る高温熱交換器と前記燃焼装置の排ガス管の一部に設けた熱交換器とを順次通過し前記排ガスからドレン水が生成されない温度以上に加熱されて前記再生器へ流入することを特徴とする。 (3) Moreover, the drainage water generation prevention method of the exhaust heat utilization type absorption chiller / heater of the present invention includes:
A regenerator, a condenser, an absorber, an evaporator, and a heat exchanger, and an absorption chiller / heater provided by connecting a pipe between them, is a burner by a combustion device using a direct fire burner provided in the regenerator. It is configured to be capable of exhaust heat operation that is operated and heated by an auxiliary regenerator that operates with the exhaust heat of the auxiliary heat source, and the absorbent heated by the auxiliary regenerator is operated in the burner operation. In the exhaust heat utilization type absorption chiller / heater fed into the regenerator through a pump that operates at times,
Regenerator temperature detecting means for detecting the temperature inside the regenerator, absorber temperature detecting means for detecting the temperature of the absorbing liquid flowing from the absorber to the auxiliary regenerator, transmission in the condenser and the absorber. Cooling water temperature detecting means for detecting the temperature of the cooling water supplied to the heat pipe,
At the start of operation, it is determined whether or not the temperature detected by each of the temperature detecting means is higher than the corresponding reference temperature, and at least one of the temperatures detected by each of the temperature detecting means is higher than the reference temperature. When the temperature is low, the pump is stopped prior to the burner operation of the heating device and only the exhaust heat operation is performed, and when all the temperatures detected by the respective temperature detection means exceed the corresponding reference temperature, the exhaust heat operation The high temperature heat exchanger and the exhaust gas pipe of the combustion device through which the burner operation starts and the absorption liquid heated by the auxiliary regenerator through the operation of the pump passes through the intermediate absorption liquid generated by the regenerator And a heat exchanger provided in a part of the exhaust gas, sequentially heated to a temperature at which drain water is not generated from the exhaust gas, and flows into the regenerator.

（４）上記（３）の排熱利用式吸収冷温水機のドレン水発生防止方法において、
前記排熱運転の継続と共に行う前記バーナ運転中に、前記各温度検出手段で検出する温度がそれに対応する前記各基準温度よりも高いか否かを判定し、前記各温度検出手段で検出する温度のうち、少なくとも何れかが前記基準温度よりも低くなった場合には、前記バーナ運転及び前記ポンプの運転を一時的に中止して前記排熱運転のみを行い、その後の前記排熱運転中は、前記各温度検出手段で検出する温度がそれに対応する前記基準温度よりも高いか否かを判定し、前記各温度検出手段で検出する温度のうち、何れかが前記基準温度よりも低い場合には、前記加熱装置のバーナ運転及び前記ポンプの停止状態を持続させたまま前記補助再生器で前記排熱運転させ、前記各温度検出手段で検出する温度が全てそれに対応する基準温度を上回ると、前記加熱装置の前記バーナ運転と前記ポンプの運転を再開することを特徴とする。 (4) In the drain water generation prevention method of the exhaust heat utilization type absorption chiller / heater of (3) above ,
During the burner operation performed with the continuation of the exhaust heat operation, it is determined whether or not the temperature detected by each temperature detection means is higher than the corresponding reference temperature, and the temperature detected by each temperature detection means When at least one of them becomes lower than the reference temperature, the burner operation and the pump operation are temporarily stopped to perform only the exhaust heat operation, and during the subsequent exhaust heat operation Determining whether the temperature detected by each temperature detecting means is higher than the corresponding reference temperature, and if any of the temperatures detected by each temperature detecting means is lower than the reference temperature The exhaust heat operation is performed by the auxiliary regenerator while maintaining the burner operation of the heating device and the stop state of the pump, and the temperatures detected by the respective temperature detection means are all higher than the corresponding reference temperature. Characterized by resuming the operation of the burner operation and the pump of the heating device.

上記（１）の本発明の排熱利用式吸収冷温水機によれば、現状の構造はできるだけそのまま利用して必要最低限の器機を付帯させるだけで、再生器温度または吸収液温度が低く、バーナ運転によってドレイン水が発生する可能性がある場合には、先に排熱運転だけを投入して吸収液温度を上げるようになっている。その結果、バーナ燃焼の際に発生する排ガスが露点以下になるのを回避させることができ、排ガスドレイン水からの強酸の生成を回避させることができるようになるので、高温再生器や排気管をステンレスなどの耐強酸性材料で形成したり、中和装置を付設することも必要なく、延いてはコストの削減を図ることができる。   According to the above-mentioned (1) waste heat utilization type absorption chiller / heater of the present invention, the regenerator temperature or the absorption liquid temperature is low only by using the current structure as it is and attaching the necessary minimum equipment, When there is a possibility that drain water may be generated by the burner operation, only the exhaust heat operation is input first to increase the absorption liquid temperature. As a result, the exhaust gas generated during burner combustion can be prevented from becoming below the dew point, and the generation of strong acid from the exhaust gas drain water can be avoided. It is not necessary to form a strong acid-resistant material such as stainless steel or attach a neutralizing device, and thus cost can be reduced.

上記（２）の本発明の排熱利用式吸収冷温水機によれば、上記（１）の効果の他に、さらに最低限の器機を付帯させるだけで、各部位からの温度をモニタすることで、さらに細かく排ガスドレイン水の発生条件を検知して、その排ガスドレイン水の発生を回避させることができるように構成されているので、簡易な構成で排ガスドレイン水からの強酸の生成を一層確実に回避させることができる。   According to the exhaust heat absorption chiller / heater of the present invention of (2) above, in addition to the effect of (1), the temperature from each part can be monitored only by attaching a minimum of equipment. With this configuration, the generation conditions of exhaust gas drain water can be detected more finely, and the generation of the exhaust gas drain water can be avoided. Can be avoided.

また、上記（３）の本発明の排熱利用式吸収冷温水機のドレン水発生防止方法によれば、運転開始の際には、再生器温度または吸収液温度が低く、バーナ運転によってドレン水が発生する可能性がある場合は、先に排熱運転だけを投入して吸収液温度を上げるようになっているので、バーナ燃焼の際に発生する排ガスが露点以下になるのを回避させることができ、排ガスドレン水からの強酸の生成を回避させることができるようになる。 In addition, according to the method (3) of the present invention for preventing the generation of drain water in the exhaust heat utilizing absorption chiller / heater of the present invention, at the start of operation, the regenerator temperature or the absorption liquid temperature is low, and the drain water is operated by the burner operation. If it is that can occur, since so raise only turned to absorb liquid temperature waste heat operation earlier, thereby avoiding the exhaust gas generated during the burner combustion is below the dew point And generation of a strong acid from the exhaust gas drain water can be avoided.

上記（４）の本発明の排熱利用式吸収冷温水機のドレン水発生防止方法によれば、上記（３）の効果の他に、さらにバーナ運転を一時的に中止した場合にも、再生器温度または吸収液温度をモニタ（逐次検出）することで、排ガスドレン水の発生条件を検知して、その排ガスドレン水の発生を回避させることができる。 According to the method (4) of the present invention for preventing the generation of drain water in an absorption chiller / heater using exhaust heat, in addition to the effect of (3) , the regeneration can be performed even when the burner operation is temporarily stopped. By monitoring (sequentially detecting) the vessel temperature or the absorption liquid temperature, it is possible to detect the generation condition of the exhaust gas drain water and avoid the generation of the exhaust gas drain water .

本発明の排熱利用式吸収冷温水機は、現状の構造はできるだけそのまま利用して必要最低限の器機を付帯させるだけで、再生器温度または吸収液温度が低く、バーナ運転によってドレイン水が発生する可能性がある場合には、先に排熱だけを投入して吸収液温度を上げるようになっており、バーナ燃焼の際に発生する排ガスが露点以下になるのを回避させることができ、排ガスドレイン水からの強酸の生成を回避させることができるようになるので、高温再生器や排気管をステンレスなどの耐強酸性材料で形成したり、中和装置を付設することも必要なく、延いてはコストの削減を図ることができる、という利点がある。   The waste heat utilization type absorption chiller / heater of the present invention uses the current structure as it is and attaches the minimum necessary equipment, the regenerator temperature or the absorption liquid temperature is low, and drain water is generated by the burner operation. If there is a possibility to do so, it is designed to raise the temperature of the absorption liquid by introducing only the exhaust heat first, and it can be avoided that the exhaust gas generated during burner combustion falls below the dew point, Since generation of strong acid from exhaust gas drain water can be avoided, it is not necessary to form a high-temperature regenerator or exhaust pipe with a strong acid-resistant material such as stainless steel, or to install a neutralizer. Therefore, there is an advantage that the cost can be reduced.

本発明の実施形態に係る排熱利用式吸収冷温水機を示す構成図である。It is a block diagram which shows the waste heat utilization type | mold absorption cold / hot water machine which concerns on embodiment of this invention. 本発明の実施形態に係るドレイン水発生防止方法に用いるマイコンなどの電気的な構成を示すブロック図である。It is a block diagram which shows electrical structures, such as a microcomputer used for the drain water generation | occurrence | production prevention method which concerns on embodiment of this invention. 本発明の実施形態に係るドレイン水発生防止方法を示すフローチャートである。It is a flowchart which shows the drain water generation | occurrence | production prevention method which concerns on embodiment of this invention. 従来のバーナ式燃焼装置を備えた吸収冷温水機を示す構成図である。It is a block diagram which shows the absorption cold / hot water machine provided with the conventional burner type combustion apparatus. 従来の排熱利用式吸収冷温水機を示す構成図である。It is a block diagram which shows the conventional waste heat utilization type | mold absorption cold / hot water machine.

以下、本発明の実施形態について、添付図面を参照しながら詳細に説明する。
図１は、本発明のドレイン水発生防止方法が適用された排熱利用式吸収冷温水機１を示すものであり、この排熱利用式吸収冷温水機１は、高温再生器１０及び低温再生器２０と、凝縮器３０と、蒸発器４０と、吸収器５０と、低温熱交換器６０及び高温熱交換器７０と、補助再生器８０と、補助凝縮器９０と、冷媒熱交換器６と、これらを接続した配管１１〜１９及び配管（流出管を構成する）４２と、これらの配管の適所に設けたバルブＶ１〜Ｖ５及びポンプＰ１〜Ｐ４と、途中に伝熱管５Ａおよび伝熱管３Ａを備えた（循環管を構成する）冷却水配管２１と、図示しない室内ユニットに冷熱または温熱を循環供給させるように冷水または温水が流れる、途中に伝熱管４０Ａを備えた冷温水配管３１と、図示外の補助熱源からの排温水を補助再生器８０に循環させる排温水配管４１との他に、再生器温度検出手段を構成する温度センサ（以下、再生器温度センサ）３と、吸収器温度検出手段を構成する温度センサ（以下、「吸収器温度センサ」とよぶ）４と、冷却水温度検出手段を構成する温度センサ（以下、「冷却水温度センサ」とよぶ）５と、これらのセンサからの温度情報に基づき排温水のみで吸収液を加熱させる（以下、これを「排熱運転」と呼ぶ）か、バーナで吸収液を加熱させる（以下、これを「バーナ運転」と呼ぶ）かの判断を行っていずれかの運転の制御を行う制御手段であるマイクロコンピュータ（以下、「マイコン」と略す）２と、少なくともバーナ運転を行っていないときに外部にこれを表示する表示手段２Ａとを備えている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an exhaust heat utilization type absorption chiller / heater 1 to which the drain water generation prevention method of the present invention is applied. The exhaust heat utilization type absorption chiller / heater 1 includes a high temperature regenerator 10 and a low temperature regeneration. , Condenser 30, evaporator 40, absorber 50, low temperature heat exchanger 60 and high temperature heat exchanger 70, auxiliary regenerator 80, auxiliary condenser 90, and refrigerant heat exchanger 6. The pipes 11 to 19 and the pipes (which constitute the outflow pipes) 42 connecting them, the valves V1 to V5 and the pumps P1 to P4 provided at appropriate positions of these pipes, and the heat transfer pipe 5A and the heat transfer pipe 3A in the middle. A cooling water pipe 21 provided (which constitutes a circulation pipe), a cold / hot water pipe 31 provided with a heat transfer pipe 40A in the middle, in which cold water or hot water flows so as to circulate and supply cold heat or hot heat to an indoor unit (not shown), Compensates for waste water from external auxiliary heat source In addition to the exhaust hot water pipe 41 circulated to the regenerator 80, a temperature sensor (hereinafter referred to as a regenerator temperature sensor) 3 that constitutes a regenerator temperature detecting means, and a temperature sensor (hereinafter referred to as "the regenerator temperature detecting means"). Absorption temperature sensor 4), temperature sensor 5 constituting cooling water temperature detection means (hereinafter referred to as "cooling water temperature sensor") 5, and absorption by only the warm water based on temperature information from these sensors Control of either operation by determining whether to heat the liquid (hereinafter referred to as “exhaust heat operation”) or to heat the absorption liquid with a burner (hereinafter referred to as “burner operation”) A microcomputer (hereinafter abbreviated as “microcomputer”) 2 and a display means 2A for displaying this at least when the burner operation is not performed.

なお、上記各配管のうち、配管１２，１２Ａ，１６，１６Ａ，１６Ｂ，１７，１９，４２については吸収液が流れる吸収液管であり、これ以外、即ち、配管１１，１１Ａ，１３，１４，１４Ａ，１８は冷媒配管（水、蒸気）である。   Of the above-mentioned pipes, the pipes 12, 12A, 16, 16A, 16B, 17, 19, and 42 are absorption liquid pipes through which the absorption liquid flows, and other than that, that is, the pipes 11, 11A, 13, 14, Reference numerals 14A and 18 denote refrigerant pipes (water, steam).

マイコン２は、上記した各バルブ、ポンプなどの動作を制御するものであるが、さらに本発明では、所定の判断基準に従って、排熱運転とバーナ運転とを適宜に切り換えて運転制御するように構成されている。このため、このマイコン２には、図２に示すように、ＣＰＵ２Ｂと、インターフェース２Ｃと、メモリ２Ｄと、を備えている。   The microcomputer 2 controls the operation of each of the above-described valves, pumps, and the like. In the present invention, the microcomputer 2 is configured to control the operation by appropriately switching between the exhaust heat operation and the burner operation according to a predetermined criterion. Has been. Therefore, as shown in FIG. 2, the microcomputer 2 includes a CPU 2B, an interface 2C, and a memory 2D.

表示手段２Ａは、例えば吸収冷温水機の運転開始でバーナ運転が停止しているとき、または排熱運転とバーナ運転との双方の運転途中でマイコン２の制御によってバーナ運転が停止されたときには、現在はこのようなバーナ運転が停止状態であることを外部に表示するものである。これにより、バーナ運転停止中の場合には、冷暖房運転能力が不足する場合があるので、このバーナ運転停止中であることを使用者に認知させることができ、使用者は、設備側で冷却水温度を上昇させる、などの適切な処置を施すことも可能になる。   For example, when the burner operation is stopped at the start of operation of the absorption chiller / heater, or when the burner operation is stopped by the control of the microcomputer 2 during both the exhaust heat operation and the burner operation, the display means 2A Currently, it is displayed externally that such burner operation is in a stopped state. As a result, when the burner operation is stopped, the air-conditioning operation capacity may be insufficient, so that the user can recognize that the burner operation is stopped. Appropriate measures such as increasing the temperature can also be taken.

ＣＰＵ２Ｂは、インターフェース２Ｃを介して、再生器温度センサ３、吸収器温度センサ４、冷却水温度センサ５と、ポンプＰ１〜Ｐ４、及びバルブＶ１〜Ｖ５と接続されている（なお、一般的にはＶ１〜Ｖ４は手動弁の場合が多いので、その場合にはＣＰＵ２Ｂとの電気的な接続は必要ない）。   The CPU 2B is connected to the regenerator temperature sensor 3, the absorber temperature sensor 4, the cooling water temperature sensor 5, the pumps P1 to P4, and the valves V1 to V5 via the interface 2C (in general, Since V1 to V4 are often manual valves, electrical connection with the CPU 2B is not necessary in that case.

また、本実施形態のポンプＰ３については、図示外の液面センサが高温再生器１０の内部に付設されており、液面が満水の状態（満液）である場合には、この液面センサからの検出信号を入力したマイコン２からの制御信号によって、動作停止の信号が出力するようになっている。従って、高温再生器１０内の吸収液が満液状態の場合には、ポンプＰ３は作動していない。   Moreover, about the pump P3 of this embodiment, when the liquid level sensor not shown is attached to the inside of the high temperature regenerator 10, and the liquid level is full (full liquid), this liquid level sensor The operation stop signal is output by the control signal from the microcomputer 2 to which the detection signal is input. Therefore, when the absorbing liquid in the high temperature regenerator 10 is full, the pump P3 is not operating.

メモリ２Ｄは、各再生器温度センサ３、吸収器温度センサ４、冷却水温度センサ５で検出する温度が、所定の基準温度を上回っているか否かによって、排熱運転とバーナ運転とを適宜に切り換えて運転制御を行うため、センサ毎に比較させる対象となる上記基準温度を予め設定して、下記の［表１］のようにまとめて格納保存させている。   The memory 2D appropriately performs the exhaust heat operation and the burner operation depending on whether or not the temperature detected by each regenerator temperature sensor 3, the absorber temperature sensor 4, and the cooling water temperature sensor 5 exceeds a predetermined reference temperature. In order to perform operation control by switching, the reference temperature to be compared for each sensor is set in advance and stored together as shown in [Table 1] below.

再生器温度センサ３は、高温再生器１０内部の温度（以下、「第１温度」とよぶ）を検出するものであって、本実施形態では、この第１温度が満たすべき比較対象とする基準温度である第１基準温度を、７０℃として設定させてある。なお、この第１基準温度とは、排高温再生器１０内部でのガスドレイン水の発生を効果的に防止することができる温度のことを指すものであって、本実施形態では上述のように７０℃に設定されているが、特にこれに限定されるものではない。   The regenerator temperature sensor 3 detects the temperature inside the high-temperature regenerator 10 (hereinafter referred to as “first temperature”), and in this embodiment, a reference that is a comparison target that the first temperature should satisfy. The first reference temperature, which is the temperature, is set as 70 ° C. The first reference temperature refers to a temperature at which the generation of gas drain water inside the exhaust high temperature regenerator 10 can be effectively prevented. In the present embodiment, as described above. Although it is set to 70 ° C., it is not particularly limited to this.

吸収器温度センサ４は、吸収器５０から補助再生器８０へ向けて吸収液が流れる配管１７の、吸収器５０近傍での液温（以下、「第２温度」とよぶ）を検出するものであり、本実施形態では定格運転での液温が通常３５〜４０℃であることを考慮して、第２温度が満たすべき比較対象とする基準温度である第２基準温度を、２５℃として設定させてある。なお、この第２基準温度とは、高温再生器１０内部でのガスドレイン水の発生を効果的に防止することができる温度のことを指すものであって、本実施形態では上述のように２５℃に設定されているが、特にこれに限定されるものではない。   The absorber temperature sensor 4 detects the liquid temperature in the vicinity of the absorber 50 (hereinafter referred to as “second temperature”) of the pipe 17 through which the absorbing liquid flows from the absorber 50 toward the auxiliary regenerator 80. Yes, in this embodiment, the second reference temperature, which is the reference temperature to be compared with the second temperature, is set as 25 ° C. in consideration that the liquid temperature in the rated operation is usually 35 to 40 ° C. I'm allowed. The second reference temperature refers to a temperature that can effectively prevent the generation of gas drain water inside the high-temperature regenerator 10, and is 25 in this embodiment as described above. Although it is set to ° C., it is not particularly limited to this.

冷却水温度センサ５は、冷却水が循環する冷却水配管２１の一部に設けられており、ここを流れる冷却水の水温（以下、「第３温度」とよぶ）を検出するものであり、本実施形態では定格運転での液温が通常３２℃であることを考慮して、又設置場所によっては季節的な温度の大幅な変化を考慮し、この第３温度が満たすべき比較対象とする基準温度である第３基準温度を、第３Ａ基準温度及び第３Ｂ基準温度として設定させてある。   The cooling water temperature sensor 5 is provided in a part of the cooling water pipe 21 through which the cooling water circulates, and detects the temperature of the cooling water flowing therethrough (hereinafter referred to as “third temperature”). In the present embodiment, considering that the liquid temperature in the rated operation is usually 32 ° C., and depending on the installation location, taking into account a significant change in seasonal temperature, this third temperature is a comparison target to be satisfied. The third reference temperature, which is the reference temperature, is set as the 3A reference temperature and the 3B reference temperature.

即ち、本実施形態では、夏季を中心とした所定の複数月（以下、「高温月間」とよぶ）を対象として、第３Ａ基準温度を設定しているものであり、ここでは２０℃に設定してある。一方、この夏季を中心とした高温月を除く季節、即ち、冬季などを中心とした所定の複数月（以下、「低温月間」とよぶ）の場合には、冷却水はなかなか第３Ａ基準温度を越えない虞があるので、いつまでも第２運転モードに入れない事態を回避させるため、その季節などに合わせて第３基準温度をもっと低めの第３Ｂ基準温度に設定してある（なお、この高温月間や低温月間は、使用する地域の気候に合わせて適宜に変更可能である）。また、このように、第３基準温度を季節などで分割することは必須ではなく、勿論単一の値に設定するような構成であってもよい。   That is, in the present embodiment, the 3A reference temperature is set for a predetermined plurality of months (hereinafter referred to as “high temperature month”) centering on summer, and is set to 20 ° C. here. It is. On the other hand, in the seasons excluding the hot months centered on the summer, that is, in the predetermined multiple months centered on the winter season (hereinafter referred to as “low temperature months”), the cooling water has a certain 3A reference temperature. The third reference temperature is set to a lower 3B reference temperature according to the season in order to avoid a situation where the second operation mode cannot be entered indefinitely. And during low temperature months, it can be changed according to the climate of the region used). In addition, as described above, it is not essential to divide the third reference temperature according to the season or the like. Of course, the third reference temperature may be set to a single value.

なお、この第３Ａ基準温度及び第３Ｂ基準温度についても、高温再生器１０内部でのガスドレイン水の発生を効果的に防止することができる温度のことを指すものであって、本実施形態では、例えばそれぞれ２４℃及び２０℃に設定されているが、特にこれに限定されるものではない。   Note that the 3A reference temperature and the 3B reference temperature also refer to temperatures that can effectively prevent the generation of gas drain water inside the high-temperature regenerator 10, and in this embodiment, For example, the temperature is set to 24 ° C. and 20 ° C., respectively, but is not particularly limited thereto.

Figure 0005598909
Figure 0005598909

高温再生器１０は、燃焼室１０Ｈに燃焼装置を設けており、この燃焼装置は、ガスバーナ（或いは石油バーナでもよい）１０Ａと、点火装置１０Ｂと、燃料であるガスを供給する供給管１０Ｉの途中に設けられてガスバーナ１０Ａに供給するガス量を制御し、発熱量すなわち高温再生器１０に投入する熱量を制御する入熱制御弁１０Ｃと、この入熱制御弁１０Ｃの開度を調節するための制御弁モータ１０Ｄと、ガスバーナ１０Ａに空気を送り込むブロア１０Ｅと、排ガス管１０Ｆと、排ガス管１０Ｆの一部に設けた熱交換器１０Ｇ、などを備えている。   The high-temperature regenerator 10 is provided with a combustion device in the combustion chamber 10H. This combustion device is in the middle of a gas burner (or may be an oil burner) 10A, an ignition device 10B, and a supply pipe 10I for supplying gas as fuel. The heat input control valve 10C for controlling the amount of gas supplied to the gas burner 10A and controlling the amount of heat generated, that is, the amount of heat input to the high temperature regenerator 10, and the opening of the heat input control valve 10C are adjusted. A control valve motor 10D, a blower 10E for sending air to the gas burner 10A, an exhaust gas pipe 10F, a heat exchanger 10G provided in a part of the exhaust gas pipe 10F, and the like are provided.

また、補助再生器８０から吸収器５０に至る吸収液配管４２の一部が分岐されて高温再生器１０との間を連結させる配管１６には、熱交換器１０Ｇを通過させる本管１６Ａと、熱交換器１０Ｇを通過させない枝管１６Ｂと、これら本管１６Ａ及び枝管１６Ｂ内の吸収液の通過を制御する開閉弁１０Ｊ及び１０Ｋと、が設けられている。   Further, a pipe 16 for branching a part of the absorption liquid pipe 42 extending from the auxiliary regenerator 80 to the absorber 50 and connecting to the high temperature regenerator 10 includes a main pipe 16A through which the heat exchanger 10G passes, A branch pipe 16B that does not pass through the heat exchanger 10G, and on-off valves 10J and 10K that control the passage of the absorbent in the main pipe 16A and the branch pipe 16B are provided.

次に、上記構成の排熱利用式吸収冷温水機の基本的な運転動作について説明する。なお、このような構成の排熱利用式吸収冷温水機にあっては、後述するドレイン水発生防止対策とともに省エネを図るために、排熱運転を優先的に行うように構成されており、ここでは、初めに排熱運転、即ち排熱のみでの運転から説明する。また、ここでは、初めに、冷房運転を行う場合について説明し、その後で、暖房運転について説明する。（なお、通常、暖房時は排熱を利用しないので、以下の暖房時の説明については理論的な動作を確認的に説明するために動作説明を行うものであって、実際上の運転は冷房時に限定するのが好ましい）。   Next, a basic operation of the exhaust heat utilization type absorption chiller / heater having the above-described configuration will be described. In addition, the exhaust heat utilization type absorption chiller / heater having such a configuration is configured to preferentially perform the exhaust heat operation in order to save energy together with measures to prevent the generation of drain water described later. First, the exhaust heat operation, that is, the operation with only exhaust heat will be described. Here, first, the case where the cooling operation is performed will be described, and then the heating operation will be described. (Normally, exhaust heat is not used at the time of heating, so the following explanation at the time of heating is for explaining the theoretical operation for confirmation, and the actual operation is cooling. Sometimes limited).

・Ａ．冷房運転について：
（Ｉ）排熱運転のみの場合；
即ち、排熱運転では、制御手段であるマイコン２により、バルブＶ１〜Ｖ４を閉じるとともに、（高温再生器１０へ吸収液が流入するのを選択的に阻止する開閉手段を構成する）ポンプＰ３のみ運転を停止させる（なお、ここでは、バルブＶ１〜Ｖ４は手動操作を行うようになっている。また、高温再生器１０については、図示外の液面センサで液面検出を行っており、満液になるとポンプＰ３が停止するようになっている）。これにより、図示外の設備から送り込まれる排温水が排温水配管４１を循環し始めると、補助再生器８０内で散布される吸収液（例えば、ＬｉＢｒ）は、排温水配管４１からの熱で加熱され冷媒蒸気を分離してから配管４２に流入し、ポンプＰ２で吸収器５０へ送り込まれる。吸収器５０へ送り込まれた吸収液は、この吸収器５０内部で散布される。これにより、吸収液は、配管１７のうち吸収器５０内部を通過する際に、蒸発器４０からの冷媒蒸気を吸収することで、徐々に加温されていく。 A. About cooling operation:
(I) In case of exhaust heat operation only;
That is, in the exhaust heat operation, only the pump P3 (which constitutes an opening / closing means for selectively blocking the absorption liquid from flowing into the high-temperature regenerator 10) while closing the valves V1 to V4 by the microcomputer 2 as the control means. The operation is stopped (in this case, the valves V1 to V4 are manually operated. In addition, the high-temperature regenerator 10 detects the liquid level by a liquid level sensor (not shown) and The pump P3 is stopped when it becomes liquid). As a result, when the exhaust warm water sent from the facility not shown starts to circulate in the exhaust warm water pipe 41, the absorbing liquid (for example, LiBr) sprayed in the auxiliary regenerator 80 is heated by the heat from the exhaust warm water pipe 41. Then, after separating the refrigerant vapor, it flows into the pipe 42 and is sent to the absorber 50 by the pump P2. The absorption liquid sent to the absorber 50 is sprayed inside the absorber 50. As a result, the absorption liquid is gradually heated by absorbing the refrigerant vapor from the evaporator 40 when passing through the absorber 50 in the pipe 17.

一方、吸収器５０内部で散布され、配管１７のうち、吸収器５０内部を通過する吸収液を加温させた後の吸収液は、熱が奪われてから吸収器５０の底部へ溜まり込んだものが、吸収器５０の底部と連結された配管１７へ流入し、ポンプＰ１で再び補助再生器８０へ送り込まれる。   On the other hand, the absorbing liquid sprayed inside the absorber 50 and heated in the pipe 17 after passing through the absorber 50 has accumulated in the bottom of the absorber 50 after the heat is taken away. A thing flows into the piping 17 connected with the bottom part of the absorber 50, and is again sent into the auxiliary regenerator 80 by the pump P1.

因みに、補助再生機８０において、配管１７から送り込まれ補助再生機８０の上部から散布される吸収液が排温水配管４１からの熱で加熱されて発生する冷媒蒸気は、補助凝縮器９０に入り込む。そして、この補助凝縮器９０に入り込んだ冷媒蒸気は、冷却水配管２１を流れる冷却水で冷却されて凝縮して液化され、配管１８を通って凝縮器３０の底部に溜まり込むが、ここでの状態では、低温再生器２０や凝縮器３０は動作機能が発生していなので、熱的な作用を受けることなく、そのまま配管１３を通って蒸発器４０へ送られる。   Incidentally, in the auxiliary regenerator 80, the refrigerant vapor generated by the absorption liquid that is sent from the pipe 17 and sprayed from the upper part of the auxiliary regenerator 80 is heated by the heat from the exhaust hot water pipe 41 enters the auxiliary condenser 90. Then, the refrigerant vapor that has entered the auxiliary condenser 90 is cooled by the cooling water flowing through the cooling water pipe 21, condensed and liquefied, and accumulates at the bottom of the condenser 30 through the pipe 18. In the state, since the operation function of the low-temperature regenerator 20 and the condenser 30 is generated, the low-temperature regenerator 20 and the condenser 30 are sent to the evaporator 40 through the pipe 13 as they are without receiving a thermal action.

このようにして、蒸発器４０へ送られてきた、凝縮液化された冷媒（水）は、ポンプＰ４で蒸発器４０の上部まで送り出され、冷温水配管３１に接続されて蒸発器４０内部に設けた伝熱管４０Ａに散布される。これにより、冷温水配管３１を介して供給される水と熱交換して蒸発し、伝熱管４０Ａの内部を流れる水を冷却する。   In this way, the condensed and liquefied refrigerant (water) sent to the evaporator 40 is sent to the upper part of the evaporator 40 by the pump P4, connected to the cold / hot water pipe 31 and provided inside the evaporator 40. The heat transfer tube 40A is sprayed. Thereby, it heat-exchanges with the water supplied via the cold / hot water piping 31, evaporates, and the water which flows through the inside of the heat exchanger tube 40A is cooled.

このようにして、排温水の熱で所定温度まで加温されてきた吸収液は、その後、バーナ運転が開始されるので、上述の配管１７及び配管４２を巡る循環ルートでの吸収液の循環動作の他に、次に説明するバーナ運転動作での循環動作が加わる。   In this way, the absorbent that has been heated to the predetermined temperature by the heat of the waste water starts the burner operation, so that the absorbent is circulated along the circulation route around the pipe 17 and the pipe 42 described above. In addition, a circulation operation in the burner operation described below is added.

（ＩＩ）（排熱運転とともに）バーナ運転を行う場合；
即ち、上記排熱運転とともに行うこのバーナ運転動作では、ポンプＰ３が稼働を開始するので、上記の排熱運転により、補助再生器８０内で散布される吸収液の一部が排温水配管４１で加熱された後に、配管４２に流入されて吸収器５０に送り込む際に、その一部が配管４２の分岐管である配管１６へ流入し、高温熱交換器７０を熱交換して本管１６Ａ又は枝管１６Ｂを通過してから高温再生器１０へ送られる（但し、実際には、配管４２からの殆どが配管１６側へ流れる。また冷房時は、本管１６Ａだけで枝管１６Ｂには流さない）。 (II) When performing burner operation (with exhaust heat operation);
That is, in this burner operation operation performed together with the exhaust heat operation, the pump P3 starts to operate, and therefore, a part of the absorbing liquid sprayed in the auxiliary regenerator 80 is exhausted in the exhaust hot water pipe 41 by the exhaust heat operation. After being heated, when it flows into the pipe 42 and is sent to the absorber 50, a part of it flows into the pipe 16 that is a branch pipe of the pipe 42, heat exchanges the high-temperature heat exchanger 70, or the main pipe 16A or After passing through the branch pipe 16B, it is sent to the high-temperature regenerator 10 (however, in reality, most of the pipe 42 flows to the pipe 16 side. During cooling, only the main pipe 16A flows into the branch pipe 16B. Absent).

なお、この高温再生器１０への送り込まれた吸収液は、所定の温度以上に加温されており、燃焼室でのバーナ運転を行っても、高温再生器１０の内部では十分に温度が上昇しており、排ガスが露点以下に冷やされて結露することがない。そのため、排ガスからドレイン水が生成されることもない（厳密には、開閉弁１０Ｊの手前の高温熱交換器７０での温度の方が低いので、ここでの吸収液温度が高いから凝縮しない）。   The absorption liquid sent to the high-temperature regenerator 10 is heated to a predetermined temperature or higher, and the temperature rises sufficiently within the high-temperature regenerator 10 even if the burner operation is performed in the combustion chamber. The exhaust gas is cooled below the dew point and does not condense. Therefore, drain water is not generated from the exhaust gas (strictly speaking, since the temperature in the high-temperature heat exchanger 70 before the on-off valve 10J is lower, it does not condense because the absorption liquid temperature here is high). .

そして、この高温再生器１０で生成された高温の冷媒蒸気は、配管１１を通って低温再生器２０に入る。そして、この低温再生器２０に入った高温の冷媒蒸気は、高温再生器１０で生成され配管１２により高温熱交換器７０を経由して低温再生器２０に入ってきた中間吸収液を、加熱することによって放熱凝縮され、凝縮器３０に入る。なお、配管１１を通るこの冷媒液は、凝縮器３０に入る直前に、冷媒熱交換器６で熱交換するので、配管１７を流れる稀吸収液を加熱することでさらに放熱されてから、凝縮器３０に入る。   The high-temperature refrigerant vapor generated by the high-temperature regenerator 10 enters the low-temperature regenerator 20 through the pipe 11. The high-temperature refrigerant vapor that has entered the low-temperature regenerator 20 heats the intermediate absorption liquid that is generated in the high-temperature regenerator 10 and that has entered the low-temperature regenerator 20 via the high-temperature heat exchanger 70 by the pipe 12. Thus, the heat is condensed and enters the condenser 30. Since the refrigerant liquid passing through the pipe 11 is heat-exchanged by the refrigerant heat exchanger 6 immediately before entering the condenser 30, the refrigerant is further radiated by heating the rare absorbing liquid flowing through the pipe 17, before the condenser. Enter 30.

このようにして、低温再生器２０で加熱されて中間吸収液から蒸発分離した冷媒（水蒸気）は、凝縮器３０へ入り、冷却水が循環する冷却水配管２１を介して供給され伝熱管３０Ａの内部を流れる冷却水、と熱交換して凝縮液化し、凝縮器３０の底部に溜まり込む。   Thus, the refrigerant (water vapor) heated by the low temperature regenerator 20 and evaporated and separated from the intermediate absorption liquid enters the condenser 30 and is supplied via the cooling water pipe 21 through which the cooling water circulates. Heat is exchanged with the cooling water flowing inside to condense and liquefy, and accumulate in the bottom of the condenser 30.

一方、補助再生器８０で加熱されて吸収液から蒸発分離した冷媒（水蒸気）は、凝縮器９０に入るが、冷却水配管２１には冷却水が循環しているので、伝熱管９０Ａの内部を流れる水と熱交換して凝縮液化される。そして、ここで凝縮液化された冷媒（水）も、凝縮器９０から配管１８を介して凝縮器３０へ入り、凝縮器３０の底部に溜まり込む。   On the other hand, the refrigerant (water vapor) that has been heated by the auxiliary regenerator 80 and evaporated and separated from the absorption liquid enters the condenser 90, but since the cooling water circulates in the cooling water pipe 21, the inside of the heat transfer tube 90A is circulated. It is condensed and liquefied by heat exchange with flowing water. The refrigerant (water) condensed and liquefied here also enters the condenser 30 from the condenser 90 via the pipe 18 and accumulates at the bottom of the condenser 30.

そして、この凝縮器３０の底部に溜まり込んだ冷媒（水）は、配管１１から凝縮して供給される冷媒と一緒になり、配管１３を通って蒸発器４０に入る。   The refrigerant (water) collected at the bottom of the condenser 30 is combined with the refrigerant supplied by condensation from the pipe 11 and enters the evaporator 40 through the pipe 13.

蒸発器４０に入って冷媒液溜りに溜まった冷媒液は、バルブＶ３が閉じているので、配管１４Ａを通らずに冷媒ポンプＰ４によってそのまま上部まで汲みあげられ、冷温水配管３１に接続された伝熱管４０Ａに散布され、冷温水配管３１を介して供給される水と熱交換して蒸発し、伝熱管４０Ａの内部を流れる水を冷却する。   Since the valve V3 is closed, the refrigerant liquid that has entered the evaporator 40 and is accumulated in the refrigerant liquid reservoir is pumped up to the upper part by the refrigerant pump P4 without passing through the pipe 14A, and is connected to the cold / hot water pipe 31. The water sprayed on the heat pipe 40A and exchanged with the water supplied via the cold / hot water pipe 31 is evaporated to cool the water flowing inside the heat transfer pipe 40A.

そして、蒸発器４０で蒸発した冷媒（水蒸気）は、吸収器５０に入る。また、この吸収器５０に入った冷媒は、低温再生器２０で加熱されて冷媒を蒸発分離し、吸収液の濃度が一層高まった吸収液、すなわち配管１９により低温熱交換器６０を経由して供給され、上方から散布される濃吸収液に吸収される。   Then, the refrigerant (water vapor) evaporated by the evaporator 40 enters the absorber 50. The refrigerant that has entered the absorber 50 is heated by the low-temperature regenerator 20 to evaporate and separate the refrigerant, and the absorption liquid whose concentration is further increased, that is, the pipe 19 passes through the low-temperature heat exchanger 60. It is supplied and absorbed by the concentrated absorbent dispersed from above.

吸収器５０で冷媒を吸収して濃度の薄くなった吸収液、すなわち稀吸収液は吸収液ポンプＰ１の運転により、配管１７から補助再生器８０へ送り込まれる。   Absorbing liquid whose concentration has been reduced by absorbing the refrigerant by the absorber 50, that is, a rare absorbing liquid, is sent from the pipe 17 to the auxiliary regenerator 80 by the operation of the absorbing liquid pump P1.

上記のように吸収冷温水機１の運転が行われると、蒸発器４０の内部に配管された伝熱管４０Ａにおいて冷媒の気化熱によって冷却された冷水が、冷温水配管３１を介して図示しない室内ユニットに循環供給できるので、冷房運転などが行える。   When the operation of the absorption chiller / heater 1 is performed as described above, the chilled water cooled by the heat of vaporization of the refrigerant in the heat transfer pipe 40 </ b> A piped inside the evaporator 40 is not shown through the chilled / hot water pipe 31. Since it can be circulated and supplied to the unit, it can perform cooling operations.

Ｂ．暖房運転について：（実際には、暖房時には、排熱を直接暖房に使ったほうが効率がよいので、排熱運転は行わないが、理論上の動作を確認する上で記載してある。）
（ＩＩＩ）排熱運転のみの場合；
冷房運転での排熱運転の場合と同様に動作することで、補助再生器８０で稀吸収液を加熱すると、補助再生器８０で加熱された稀吸収液は、配管４２を通って吸収器５０に入るが、蒸発器４０にはエリミネータで遮断され殆ど入り込むことがない。そのため、冷温水配管３１から供給される水と伝熱管４０Ａを介して熱交換して凝縮されることが殆どなく、従ってこのときの凝縮熱によって伝熱管４０Ａの内部を流れる水が加熱されることもない。 B. About heating operation: (In actuality, it is more efficient to use exhaust heat directly for heating, so exhaust heat operation is not performed, but it is described to confirm the theoretical operation.)
(III) In the case of only exhaust heat operation;
By operating similarly to the case of the exhaust heat operation in the cooling operation, when the rare absorbent is heated by the auxiliary regenerator 80, the rare absorbent heated by the auxiliary regenerator 80 passes through the pipe 42 and is absorbed by the absorber 50. However, the evaporator 40 is blocked by an eliminator and hardly enters. Therefore, the water supplied from the cold / hot water pipe 31 and the heat transfer pipe 40A are hardly exchanged and condensed, and therefore the water flowing inside the heat transfer pipe 40A is heated by the condensation heat at this time. Nor.

（ＩＶ）（排熱運転とともに）バーナ運転を行う場合；
一方、開閉弁Ｖ１〜Ｖ３を開け、冷却水配管２１に冷却水を流さないでガスバーナ１０Ａに点火して高温再生器１０で稀吸収液を加熱すると、高温再生器１０で稀吸収液から蒸発した冷媒は配管１１の途中から主に流路抵抗の小さい配管１１Ａを通って吸収器５０・蒸発器４０に入り、冷温水配管３１から供給される水と伝熱管４０Ａを介して熱交換して凝縮し、主にこのときの凝縮熱によって伝熱管４０Ａの内部を流れる水が加熱される。 (IV) When performing burner operation (with exhaust heat operation);
On the other hand, when the on-off valves V1 to V3 are opened and the rare absorbent is heated by the high temperature regenerator 10 by igniting the gas burner 10A without flowing cooling water through the cooling water pipe 21, the high temperature regenerator 10 evaporates from the rare absorbent. The refrigerant enters the absorber 50 / evaporator 40 mainly from the middle of the pipe 11 through the pipe 11A having a small flow resistance, and condenses by exchanging heat with the water supplied from the cold / hot water pipe 31 through the heat transfer pipe 40A. However, the water flowing inside the heat transfer tube 40A is mainly heated by the condensation heat at this time.

そして、蒸発器４０内部の伝熱管４０Ａで加熱された温水を、冷温水配管３１を介して図示しない室内ユニットに循環供給することにより、暖房運転などが行なわれる。   And heating operation etc. are performed by circulatingly supplying the hot water heated with the heat exchanger tube 40A inside the evaporator 40 to the indoor unit which is not shown in figure via the cold / hot water piping 31. FIG.

なお、蒸発器４０で加熱作用を行って凝縮した冷媒（水）は、開いている配管１４Ａを通って吸収器５０に入り、高温再生器１０で冷媒を蒸発分離して配管１２Ａから流入する吸収液と混合され、吸収液ポンプＰ１の運転によって配管１７を経て補助再生器８０へ送られる。   The refrigerant (water) condensed by the heating action in the evaporator 40 enters the absorber 50 through the open pipe 14A, and is absorbed by the high-temperature regenerator 10 by evaporating and separating the refrigerant and flowing from the pipe 12A. The liquid is mixed and sent to the auxiliary regenerator 80 through the pipe 17 by the operation of the absorbing liquid pump P1.

そして、補助再生器８０内で散布される吸収液が排温水配管４１で加熱された後に、配管４２に流入し吸収器５０に送り込まれる際に、その一部が配管４２の分岐管である配管１２へ流入し、高温熱交換器７０を経由して本管１６Ａ又は枝管１６Ｂを通過してから高温再生器１０へ送られる。
その後、その後、上述の動作と同様の動作が行われる。 Then, after the absorbing liquid sprayed in the auxiliary regenerator 80 is heated in the exhaust hot water pipe 41 and then flows into the pipe 42 and sent into the absorber 50, a part of the pipe is a branch pipe of the pipe 42 12, passes through the main pipe 16 </ b> A or the branch pipe 16 </ b> B via the high-temperature heat exchanger 70, and then sent to the high-temperature regenerator 10.
Thereafter, the same operation as described above is performed.

なお、この高温再生器１０への送り込まれた吸収液は、所定の温度以上に加温されており、燃焼室でのバーナ運転を行っても、高温再生器１０の内部では十分に温度が上昇しており、排ガスが露点以下に冷やされて結露することがない。そのため、排ガスからドレイン水が生成されることもない。   The absorption liquid sent to the high-temperature regenerator 10 is heated to a predetermined temperature or higher, and the temperature rises sufficiently within the high-temperature regenerator 10 even if the burner operation is performed in the combustion chamber. The exhaust gas is cooled below the dew point and does not condense. Therefore, drain water is not generated from the exhaust gas.

次に、本発明に係る排熱利用式吸収冷温水機の排ガスドレイン水発生防止方法について、図３を参照しながら説明する。但し、ここでは、特に冷房運転について説明するが、上述した暖房運転についての手順も同様である。   Next, the exhaust gas drain water generation prevention method of the exhaust heat utilization type absorption chiller / heater according to the present invention will be described with reference to FIG. However, although the cooling operation will be specifically described here, the procedure for the heating operation described above is also the same.

ｉ）初めに、第１ステップＳ１では、排熱運転のみを行う運転モード（第１運転モード）、或いは排熱運転とともにバーナ運転を行う運転モード（第２運転モード）、の何れを行うべきかを判断するため、各温度センサでの検出温度（第１温度乃至第３温度）をマイコン２へ出力する。   i) First, in the first step S1, which of the operation mode in which only the exhaust heat operation is performed (first operation mode) or the operation mode in which the burner operation is performed together with the exhaust heat operation (second operation mode) should be performed. Therefore, the temperature detected by each temperature sensor (first temperature to third temperature) is output to the microcomputer 2.

そして、この検出温度を入力したマイコン２では、上記した［表１］の判定基準に従って、これら３種類の検出温度と各基準温度との大小関係から、運転モードを決定する。
即ち、３つの温度条件である、各検出温度がそれと比較するべき基準温度を満たさない、ものが存在するときには、第２ステップＳ２へ移行する。また、何れの温度条件も同時に満たす場合には、第４ステップへ移行する。 Then, in the microcomputer 2 to which this detected temperature is input, the operation mode is determined from the magnitude relationship between these three types of detected temperatures and each reference temperature in accordance with the determination criteria of [Table 1] described above.
That is, when there are three temperature conditions, that is, each detected temperature does not satisfy the reference temperature to be compared with, there is a transition to the second step S2. Moreover, when all temperature conditions are satisfy | filled simultaneously, it transfers to a 4th step.

ｉｉ）第２ステップＳ２では、第１運転モード、即ち排熱運転のみを行う。そのため、排温水配管４１に設けたバルブＶ５を、制御手段であるマイコン２からの制御信号によって開き、図示外の補助熱源からの排温水を排温水配管４１を介して補助再生器８０に循環させる。また、これと同時に、ポンプＰ１、Ｐ２を制御手段であるマイコン２からの制御信号によって運転開始させる。   ii) In the second step S2, only the first operation mode, that is, the exhaust heat operation is performed. Therefore, the valve V5 provided in the exhaust hot water pipe 41 is opened by a control signal from the microcomputer 2 as the control means, and the exhaust hot water from the auxiliary heat source (not shown) is circulated to the auxiliary regenerator 80 through the exhaust hot water pipe 41. . At the same time, the pumps P1 and P2 are started to operate by a control signal from the microcomputer 2 as control means.

これにより、配管１７、及び配管４２の間で、吸収液を循環させ、排熱運転のみを行う。   Accordingly, the absorbing liquid is circulated between the pipe 17 and the pipe 42, and only the exhaust heat operation is performed.

なお、本実施形態では、吸収液をこの高温再生器１０を介して循環させないままで、高温再生器１０内の温度を検出させるように構成したが、第１温度がなかなか上昇しないようであれば、ポンプＰ３及び開閉弁１０Ｊ又は１０Ｋを開いて、吸収液を高温再生器１０を介して循環させるように構成してもよい（即ち、正確には、実際は高温再生器１０が満液になって、ポンプＰ３が運転停止していると、循環が止まり温度は変わらないので、高温再生器１０の温度だけで判定はできないので、冷却水温度或いは吸収器温度で見るか、ポンプＰ３が運転しているときだけ高温再生器温度で判定する、ように構成するのが好ましい）。   In the present embodiment, the absorption liquid is not circulated through the high temperature regenerator 10, and the temperature in the high temperature regenerator 10 is detected. However, if the first temperature does not rise easily. Further, the pump P3 and the on-off valve 10J or 10K may be opened to circulate the absorbing liquid through the high temperature regenerator 10 (that is, actually, the high temperature regenerator 10 is actually full. When the operation of the pump P3 is stopped, the circulation stops and the temperature does not change. Therefore, the determination cannot be made only by the temperature of the high-temperature regenerator 10, so that the pump P3 is operated by looking at the cooling water temperature or the absorber temperature. It is preferable that the determination is made based on the high temperature regenerator temperature only when the engine is in use).

ｉｉｉ）次に、第３ステップＳ３では、第１ステップＳ１と同様にして、各検出温度が基準温度に達したか否かを判断する。ここでは、第２ステップＳ２での排熱運転に伴って、次第に吸収液の液温が上昇してくるので、各センサで検出する検出温度（第１温度及び第２温度）が上昇してくる。また、冷却水温度センサ５で検出する検出温度（第３温度）については、ここでの現在の使用がどの月間であるかによって、参照すべき第３基準温度を適宜選択する（即ち、夏季などの高温月間には第３Ａ基準温度である２４℃、冬季などの低温月間には第３Ｂ基準温度である２０℃を用いる）。   iii) Next, in the third step S3, as in the first step S1, it is determined whether or not each detected temperature has reached the reference temperature. Here, since the liquid temperature of the absorbing liquid gradually increases with the exhaust heat operation in the second step S2, the detected temperatures (first temperature and second temperature) detected by each sensor increase. . For the detected temperature (third temperature) detected by the cooling water temperature sensor 5, the third reference temperature to be referred to is appropriately selected depending on which month the current use here is (that is, summer, etc.). The 3A standard temperature of 24 ° C. is used during the high temperature month, and the 3B standard temperature of 20 ° C. is used during the low temperature month such as winter.

そして、これら第１温度〜第３温度が、全て、それに対応する基準温度を上回ったと判断した場合には、第４ステップＳ４へ移行する。一方、これら第１温度〜第３温度の少なくともいずれかが、それに対応する基準温度を上回っていないと判断した場合には、第２ステップＳ２へ戻る。   When it is determined that all of the first to third temperatures have exceeded the corresponding reference temperature, the process proceeds to the fourth step S4. On the other hand, if it is determined that at least one of the first temperature to the third temperature does not exceed the corresponding reference temperature, the process returns to the second step S2.

ｉｖ）第４ステップＳ４では、第２運転モード、つまり引き続き行う排熱運転とともに、バーナ運転を開始させる。即ち、この第２運転モードでは、配管４２を流れる吸収液の一部が配管１６、本管１６Ａ、高温再生器１０を介して、配管１２、低温再生器２０、配管１９を通って、配管４２に合流させる。また、マイコン２の制御によって、ポンプＰ４を作動させ、蒸発器４０に入って冷媒液溜りに溜まった冷媒液が冷媒ポンプＰ４によってそのまま上部まで汲みあげられ、冷温水配管３１に接続された伝熱管４０Ａの上に散布され、冷温水配管３１を介して供給される水と熱交換して蒸発し、伝熱管４０Ａの内部を流れる水を冷却する（但し、ここでの動作は、実際は排熱運転時にも行っている）。   iv) In the fourth step S4, the burner operation is started together with the second operation mode, that is, the exhaust heat operation to be continued. That is, in this second operation mode, a part of the absorbent flowing through the pipe 42 passes through the pipe 16, the main pipe 16 </ b> A, and the high temperature regenerator 10, passes through the pipe 12, the low temperature regenerator 20, and the pipe 19. To join. Further, under the control of the microcomputer 2, the pump P4 is operated, and the refrigerant liquid that has entered the evaporator 40 and accumulated in the refrigerant liquid reservoir is pumped up to the upper part by the refrigerant pump P4, and is connected to the cold / hot water pipe 31. The water sprayed on 40A, exchanges heat with water supplied via the cold / hot water pipe 31, evaporates, and cools the water flowing inside the heat transfer tube 40A (however, the operation here is actually an exhaust heat operation). Sometimes also).

上記のように吸収冷温水機の運転が行われると、蒸発器４０の内部に配管された伝熱管４０Ａにおいて冷媒の気化熱によって冷却された冷水が、冷温水配管３１を介して図示しない室内ユニットに循環供給できるので、冷房運転などが行える。   When the absorption chiller / hot water machine is operated as described above, the chilled water cooled by the heat of vaporization of the refrigerant in the heat transfer pipe 40A piped inside the evaporator 40 is not shown through the chilled / hot water pipe 31. Since it can be circulated and supplied, it can be cooled.

このようにして、第１温度及び第２温度は、第２運転モードを行っている間、即ち、熱負荷などが極端に減少しない限り、或いは、外気温の低下などとともに、第３温度（冷却水の温度）が低下しない限り、定格温度を維持することが可能である。従って、そのまま第２運転モードが維持される。なお、この第２運転モードでは、燃焼室でのバーナ運転を行っても、高温再生器１０の内部は十分に温度が上昇しており、排ガスが露点以下に冷やされて結露することがない。そのため、排ガスからドレイン水が生成されることもない。   In this way, the first temperature and the second temperature are the third temperature (cooling) while the second operation mode is being performed, that is, unless the heat load or the like is extremely reduced or when the outside air temperature decreases. The rated temperature can be maintained as long as the temperature of the water does not drop. Therefore, the second operation mode is maintained as it is. In this second operation mode, even if the burner operation is performed in the combustion chamber, the temperature inside the high-temperature regenerator 10 is sufficiently increased, and the exhaust gas is not cooled down below the dew point and condensation does not occur. Therefore, drain water is not generated from the exhaust gas.

ｖ）その後、第５ステップＳ５に移行し、マイコン２は検出温度を常時検知し、これらのいずれかの検出温度（第１温度〜第３温度）が、上述した［表１］に記載の基準温度を下回ることがないかを判断する。   v) Thereafter, the process proceeds to the fifth step S5, where the microcomputer 2 constantly detects the detected temperature, and any one of these detected temperatures (first temperature to third temperature) is the standard described in [Table 1]. Determine if the temperature is below.

そして、もし、いずれかの検出温度（第１温度〜第３温度）が、上述した［表１］に記載の基準温度を下回ると判断した場合には、第６ステップＳ６へ移行する。   If any of the detected temperatures (first temperature to third temperature) is determined to be lower than the reference temperature described in [Table 1], the process proceeds to the sixth step S6.

ｖｉ）第６ステップＳ６では、高温再生器１０内でのドレイン水発生を回避させるために、直ちに第２運転から第１運転へ運転動作を転換させる。即ち、マイコン２の制御によって、バーナ１０Ａへの燃料供給を停止することにより、バーナによる燃焼を一時的に停止させる。また、このときドレイン水の発生を確実に阻止するため、場合によっては、開閉弁１０Ｊも閉じるようにしてもよい。   vi) In 6th step S6, in order to avoid generation | occurrence | production of drain water in the high temperature regenerator 10, driving | operation operation | movement is changed from 2nd operation to 1st operation immediately. That is, the combustion by the burner is temporarily stopped by stopping the fuel supply to the burner 10A under the control of the microcomputer 2. At this time, in order to reliably prevent the generation of drain water, the on-off valve 10J may be closed in some cases.

ｖｉｉ）次に、第７ステップＳ７では、第６ステップＳ６においてバーナ１０Ａによる燃焼動作が停止させていることによって、冷却能力が不足する虞があるので、以下のような表示動作も併せて行う。即ち、バーナによる燃焼動作が現在停止中であることを使用者に知らせるため、図示外の適宜の場所、例えば、マイコン２の本体に設けた（或いは付設した）液晶などの表示手段２Ａによって表示画面に、バーナ運転停止中であることを表示させる。これによって、使用者は、図示しない設備などで所定の最善の対策・処置、例えば冷却水温度を上昇させる、などの処置を施すことができる。   vii) Next, in the seventh step S7, since the combustion operation by the burner 10A is stopped in the sixth step S6, there is a possibility that the cooling capacity may be insufficient, so the following display operation is also performed. That is, in order to notify the user that the combustion operation by the burner is currently stopped, the display screen is displayed by a display means 2A such as a liquid crystal provided (or attached) on the main body of the microcomputer 2 in an appropriate place not shown. To indicate that the burner operation is stopped. As a result, the user can take predetermined best countermeasures / measures such as raising the cooling water temperature using equipment (not shown).

この第７ステップＳ７によるバーナ停止中であることを表示したならば、次に、第３ステップＳ３へ戻り、各検出温度が基準温度に達したか否かを判断する。   If it is displayed that the burner is stopped in the seventh step S7, the process returns to the third step S3 to determine whether or not each detected temperature has reached the reference temperature.

一方、第５ステップＳ５において、いずれの検出温度（第１温度〜第３温度）も、上述した［表１］に記載の基準温度を下回っていないと判断した場合には、第８ステップＳ８へ移行する。   On the other hand, if it is determined in the fifth step S5 that none of the detected temperatures (first temperature to third temperature) is lower than the reference temperature described in [Table 1], the process proceeds to the eighth step S8. Transition.

ｖｉｉｉ）この第８ステップＳ８では、第２運転をそのまま継続する。なお、ここでは、高温再生器１０への送り込まれた吸収液は、所定の温度以上に加温されており、燃焼室でのバーナ運転を行っても、高温再生器１０の内部では十分に温度が上昇しており、排ガスが露点以下に冷やされて結露することがない。そのため、排ガスからドレイン水が生成されることもない。   viii) In the eighth step S8, the second operation is continued as it is. Here, the absorption liquid sent to the high temperature regenerator 10 is heated to a predetermined temperature or higher, and even if the burner operation is performed in the combustion chamber, the temperature inside the high temperature regenerator 10 is sufficiently high. The exhaust gas is cooled below the dew point and no condensation occurs. Therefore, drain water is not generated from the exhaust gas.

ｉｘ）このようにして第２運転を行っているときには、次に、第９ステップＳ９において、冷温水機の運転を終了するか否かを判断する。そして、このまま運転を継続させる場合には、第５ステップＳ５へ戻り、再び、いずれの検出温度（第１温度〜第３温度）も、上述した［表１］に記載の基準温度を下回っていないかどうかをマイコン２が判断する。   ix) When the second operation is performed in this way, next, in the ninth step S9, it is determined whether or not the operation of the cold / hot water machine is to be ended. And when continuing an operation | movement as it is, it returns to 5th step S5, and any detected temperature (1st temperature-3rd temperature) is not lower than the reference temperature as described in [Table 1] mentioned above again. The microcomputer 2 determines whether or not.

ｘ）一方、ここで、吸収冷温水機１の運転を終了する場合には、第１０ステップＳ１０へ移行し、バルブＶ５を閉じて排熱運転を停止させるとともに、制御弁モータ１０Ｄを制御して入熱制御弁１０Ｃ閉鎖することで、バーナ１０Ａへの燃料の供給をストップさせてバーナ運転を停止させる。また、各ポンプＰ１〜Ｐ４の運転を停止させるとともに、冷却水の循環を停止させる。   x) On the other hand, when the operation of the absorption chiller / heater 1 is ended, the process proceeds to the tenth step S10, the valve V5 is closed to stop the exhaust heat operation, and the control valve motor 10D is controlled. By closing the heat input control valve 10C, the fuel supply to the burner 10A is stopped and the burner operation is stopped. Further, the operation of each of the pumps P1 to P4 is stopped and the circulation of the cooling water is stopped.

従って、本実施形態によれば、現状の構造はできるだけそのまま利用して、具体的には、現状の排熱利用式吸収冷温水機１において、少なくとも、ポンプＰ３、再生器温度センサ３、吸収器温度センサ４、冷却水温度センサ５などを所定の部位に設置するとともに、これらのポンプやセンサをマイコン２と接続させ、かつ、マイコン２に設けたメモリ２Ｄに各センサで検出する検出温度との比較を行うべき基準温度を予め設定して格納した構成となっており、各検出温度と基準温度との比較によって第１運転、第２運転のいずれを行うかをマイコン２で制御するように構成されている。   Therefore, according to the present embodiment, the current structure is utilized as much as possible. Specifically, in the current waste heat utilization type absorption chiller / heater 1, at least the pump P3, the regenerator temperature sensor 3, the absorber. The temperature sensor 4 and the cooling water temperature sensor 5 are installed at predetermined sites, and these pumps and sensors are connected to the microcomputer 2 and the detected temperature detected by each sensor in the memory 2D provided in the microcomputer 2 The reference temperature to be compared is set and stored in advance, and the microcomputer 2 controls whether the first operation or the second operation is performed by comparing each detected temperature with the reference temperature. Has been.

従って、本実施形態によれば、マイコン２の制御で各部位の検出温度に応じた運転制御を行うことできるので、最小限の機器を増設するだけで、排ガスドレイン水の発生を防止できるようになり、強酸の生成を低コストで回避できる。しかも、本実施形態によれば、高温再生器や排気管をステンレスなどの耐強酸性材料で形成したり、中和装置を付設しなくても済むので、コスト削減をさらに図ることができ、便宜である。   Therefore, according to the present embodiment, since the operation control according to the detected temperature of each part can be performed by the control of the microcomputer 2, the generation of the exhaust gas drain water can be prevented only by adding a minimum number of devices. Thus, the formation of strong acid can be avoided at a low cost. In addition, according to the present embodiment, it is not necessary to form the high temperature regenerator and the exhaust pipe with a strong acid resistant material such as stainless steel, or to attach a neutralizing device, so that it is possible to further reduce the cost and convenience. It is.

なお、本発明は、上記した実施形態に限定されるものではなく、特許請求の範囲に記載の要旨の範囲から逸脱しない範囲で各種の変形実施が可能である。
即ち、例えば本実施形態では、冷房及び暖房何れも行うことが可能な冷温水機に適用したが、冷房専用のタイプであっても適用可能である。 Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the gist described in the claims.
That is, for example, in the present embodiment, the present invention is applied to a chiller / heater that can perform both cooling and heating, but the present invention can also be applied to a type dedicated to cooling.

また、本実施形態では、排熱利用式吸収冷温水機１の運転中に高温再生器１０内部が所定の温度まで低下するとバーナ運転を一時的に中止したが、本発明では、バーナ運転を完全に中止させるのではなく、所定の最少レベルまで運転能力を抑制させるような構成であってもよい。   In the present embodiment, the burner operation is temporarily stopped when the inside of the high-temperature regenerator 10 is lowered to a predetermined temperature during the operation of the exhaust heat utilizing absorption chiller / heater 1. However, in the present invention, the burner operation is completely stopped. It is possible to employ a configuration in which the driving ability is suppressed to a predetermined minimum level instead of being stopped.

１ 排熱利用式吸収冷温水機
２ マイコン（マイクロコンピュータ；制御手段）
２Ａ 表示手段
２Ｂ ＣＰＵ
２Ｃ インターフェース
２Ｄ メモリ
３ 再生器温度検出手段（再生器温度センサ）
４ 吸収器温度検出手段（吸収器温度センサ）
５ 冷却水温度検出手段（冷却水温度センサ）
６ 冷媒熱交換器
１０ 高温再生器
１０Ａ バーナ
１０Ｂ 点火装置
１０Ｃ 入熱制御弁
１０Ｄ 制御弁モータ
１０Ｅ ブロア
１０Ｆ 排ガス管
１０Ｇ 熱交換器
１０Ｊ，１０Ｋ 開閉弁
１１〜１９ 配管
１９ 冷媒ポンプ
２０ 低温再生器
２０Ａ〜２０Ｅ 冷暖房機（室内ユニット；熱負荷）
２１ 冷却水配管（循環管）
３０ 凝縮器
３０Ａ 伝熱管
３１ 冷温水配管
４０ 蒸発器
４０Ａ 伝熱管
４１ 排温水配管
４２ 配管（流出管）
５０ 吸収器
５０Ａ 伝熱管
６０ 低温熱交換器
７０ 高温熱交換器
８０ 補助再生器
９０ 補助凝縮器
Ｖ１〜Ｖ５ バルブ
Ｐ１〜Ｐ３ ポンプ 1 Exhaust heat absorption chiller / heater 2 Microcomputer (microcomputer; control means)
2A display means 2B CPU
2C interface 2D memory 3 regenerator temperature detection means (regenerator temperature sensor)
4 Absorber temperature detection means (absorber temperature sensor)
5 Cooling water temperature detection means (cooling water temperature sensor)
6 Refrigerant heat exchanger 10 High temperature regenerator 10A Burner 10B Ignition device 10C Heat input control valve 10D Control valve motor 10E Blower 10F Exhaust pipe 10G Heat exchanger 10J, 10K On-off valve 11-19 Piping 19 Refrigerant pump 20 Low temperature regenerator 20A 20E air conditioner (indoor unit; heat load)
21 Cooling water piping (circulation pipe)
30 Condenser 30A Heat Transfer Tube 31 Cold / Hot Water Pipe 40 Evaporator 40A Heat Transfer Tube 41 Waste Heat Water Pipe 42 Pipe (Outflow Pipe)
50 Absorber 50A Heat Transfer Tube 60 Low Temperature Heat Exchanger 70 High Temperature Heat Exchanger 80 Auxiliary Regenerator 90 Auxiliary Condenser V1-V5 Valve P1-P3 Pump

Claims (4)

再生器、凝縮器、吸収器、蒸発器、及び熱交換器を備えるとともに、これらの間を配管接続して設けた吸収冷温水機を、前記再生器に設けた直火バーナによる燃焼装置でバーナ運転し、かつ、前記吸収器から送り込まれる吸収液を補助熱源の排熱で動作する補助再生器で加熱する排熱運転可能に構成し、前記補助再生器で加熱された吸収液が前記バーナ運転時に運転するポンプを介して前記再生器に送り込まれる排熱利用式吸収冷温水機であって、
前記再生器内部の温度を検出する再生器温度検出手段と制御手段とを備え、
前記制御手段は、前記温度検出手段で検出する温度が少なくとも所定の基準温度を上回るまで、前記ポンプを停止し前記再生器への吸収液の流入を一時的に阻止して前記排熱運転のみを行い、前記検出温度が基準温度を上回ると、前記バーナを点火させて前記バーナ運転を行うよう前記バーナ運転に優先して前記排熱運転を行い、
前記バーナ運転では前記ポンプの運転により、前記補助再生器で加熱された吸収液が、前記再生器で生成された中間吸収液が通る高温熱交換器と前記燃焼装置の排ガス管の一部に設けた熱交換器とを通過し、前記排ガスからドレン水が生成されない温度以上に加熱されて前記再生器へ流入することを特徴とする排熱利用式吸収冷温水機。 A regenerator, a condenser, an absorber, an evaporator, and a heat exchanger, and an absorption chiller / heater provided by connecting a pipe between them, is a burner by a combustion device using a direct fire burner provided in the regenerator. It is configured to be capable of exhaust heat operation that is operated and heated by an auxiliary regenerator that operates with the exhaust heat of the auxiliary heat source, and the absorbent heated by the auxiliary regenerator is operated in the burner operation. An exhaust heat utilizing absorption chiller / heater that is fed into the regenerator via a pump that is sometimes operated ,
Regenerator temperature detecting means for detecting the temperature inside the regenerator and control means,
The control means stops the pump until the temperature detected by the temperature detection means exceeds at least a predetermined reference temperature, and temporarily prevents the absorption liquid from flowing into the regenerator and performs only the exhaust heat operation. When the detected temperature exceeds a reference temperature, the exhaust heat operation is performed in preference to the burner operation so that the burner operation is performed by igniting the burner,
In the burner operation, due to the operation of the pump, the absorption liquid heated by the auxiliary regenerator is provided in a high temperature heat exchanger through which the intermediate absorption liquid generated by the regenerator passes and a part of the exhaust pipe of the combustion device. The exhaust heat utilizing absorption chiller / heater is heated to a temperature at which drain water is not generated from the exhaust gas and flows into the regenerator . 再生器、凝縮器、吸収器、蒸発器、及び熱交換器を備えるとともに、これらの間を配管接続して設けた吸収冷温水機を、前記再生器に設けた直火バーナによる燃焼装置でバーナ運転し、かつ、前記吸収器から送り込まれる吸収液を補助熱源の排熱で動作する補助再生器で加熱する排熱運転可能に構成し、前記補助再生器で加熱された吸収液が前記バーナ運転時に運転するポンプを介して前記再生器に送り込まれる排熱利用式吸収冷温水機であって、
前記再生器内部の温度を検出する再生器温度検出手段と、前記吸収器から前記補助再生器へ流れる吸収液の温度を前記吸収器近傍で検出する吸収器温度検出手段と、前記凝縮器及び前記吸収器内の伝熱管へ供給する冷却水の温度を検出する冷却水温度検出手段と、前記各温度検出手段からの温度情報に基づき前記排熱運転及び前記バーナ運転の運転制御を行う制御手段とを備え、
前記制御手段によって、前記各温度検出手段で検出する温度が全てそれに対応する基準温度を上回るまで、前記ポンプを停止し前記再生器への吸収液の流入を阻止して前記排熱運転のみを行い、前記各温度検出手段で検出する温度が全てそれに対応する基準温度を上回ると、前記排熱運転の継続と共に前記バーナ運転を開始し、
前記バーナ運転では前記ポンプの運転により、前記補助再生器で加熱された吸収液が、前記再生器生成された中間吸収液が通る高温熱交換器と前記燃焼装置の排ガス管の一部に設けた熱交換器とを順次通過し前記排ガスからドレン水が生成されない温度以上に加熱されて前記再生器へ流入する管路を流れることを特徴とする排熱利用式吸収冷温水機。 A regenerator, a condenser, an absorber, an evaporator, and a heat exchanger, and an absorption chiller / heater provided by connecting a pipe between them, is a burner by a combustion device using a direct fire burner provided in the regenerator. It is configured to be capable of exhaust heat operation that is operated and heated by an auxiliary regenerator that operates with the exhaust heat of the auxiliary heat source, and the absorbent heated by the auxiliary regenerator is operated in the burner operation. An exhaust heat utilizing absorption chiller / heater that is fed into the regenerator via a pump that is sometimes operated,
Regenerator temperature detecting means for detecting the temperature inside the regenerator, absorber temperature detecting means for detecting the temperature of the absorbing liquid flowing from the absorber to the auxiliary regenerator in the vicinity of the absorber, the condenser, and the Cooling water temperature detection means for detecting the temperature of the cooling water supplied to the heat transfer tubes in the absorber, and control means for performing operation control of the exhaust heat operation and the burner operation based on temperature information from each temperature detection means; With
Until the temperature detected by each of the temperature detecting means exceeds the corresponding reference temperature by the control means, the pump is stopped to prevent the absorption liquid from flowing into the regenerator, and only the exhaust heat operation is performed. When the temperatures detected by the respective temperature detection means exceed all corresponding reference temperatures, the burner operation is started together with the continuation of the exhaust heat operation,
In the burner operation, the absorption liquid heated by the auxiliary regenerator is provided in a part of the exhaust gas pipe of the combustion apparatus and the high-temperature heat exchanger through which the intermediate absorption liquid generated by the regenerator passes by the operation of the pump. An exhaust heat utilization type absorption chiller / heater characterized by passing through a heat exchanger and flowing through a conduit that is heated to a temperature at which drain water is not generated from the exhaust gas and flows into the regenerator . 再生器、凝縮器、吸収器、蒸発器、及び熱交換器を備えるとともに、これらの間を配管接続して設けた吸収冷温水機を、前記再生器に設けた直火バーナによる燃焼装置でバーナ運転し、かつ、前記吸収器から送り込まれる吸収液を補助熱源の排熱で動作する補助再生器で加熱する排熱運転可能に構成し、前記補助再生器で加熱された吸収液が前記バーナ運転時に運転するポンプを介して前記再生器に送り込まれる排熱利用式吸収冷温水機において、
前記再生器内部の温度を検出する再生器温度検出手段と、前記吸収器から前記補助再生器へ流れる吸収液の温度を検出する吸収器温度検出手段と、前記凝縮器及び前記吸収器内の伝熱管へ供給する冷却水の温度を検出する冷却水温度検出手段とを備え、
運転起動時には、前記各温度検出手段で検出する温度がそれに対応する基準温度よりも高いか否かを判定し、前記各温度検出手段で検出する温度のうち、少なくとも何れかが前記基準温度よりも低い場合には、前記加熱装置のバーナ運転に先立ち前記ポンプを停止し前記排熱運転のみを行い、前記各温度検出手段で検出する温度が全てそれに対応する基準温度を上回ると、前記排熱運転の継続と共に前記バーナ運転を開始し、前記ポンプの運転により前記補助再生器で加熱された吸収液が、前記再生器で生成された中間吸収液が通る高温熱交換器と前記燃焼装置の排ガス管の一部に設けた熱交換器とを順次通過し前記排ガスからドレン水が生成されない温度以上に加熱されて前記再生器へ流入することを特徴とする排熱利用式吸収冷温水機のドレン水発生防止方法。 A regenerator, a condenser, an absorber, an evaporator, and a heat exchanger, and an absorption chiller / heater provided by connecting a pipe between them, is a burner by a combustion device using a direct fire burner provided in the regenerator. It is configured to be capable of exhaust heat operation that is operated and heated by an auxiliary regenerator that operates with the exhaust heat of the auxiliary heat source, and the absorbent heated by the auxiliary regenerator is operated in the burner operation. In the exhaust heat utilization type absorption chiller / heater fed into the regenerator through a pump that operates at times,
Regenerator temperature detecting means for detecting the temperature inside the regenerator, absorber temperature detecting means for detecting the temperature of the absorbing liquid flowing from the absorber to the auxiliary regenerator, transmission in the condenser and the absorber. Cooling water temperature detecting means for detecting the temperature of the cooling water supplied to the heat pipe,
At the start of operation, it is determined whether or not the temperature detected by each of the temperature detecting means is higher than the corresponding reference temperature, and at least one of the temperatures detected by each of the temperature detecting means is higher than the reference temperature. When the temperature is low, the pump is stopped prior to the burner operation of the heating device and only the exhaust heat operation is performed, and when all the temperatures detected by the respective temperature detection means exceed the corresponding reference temperature, the exhaust heat operation The high temperature heat exchanger and the exhaust gas pipe of the combustion device through which the burner operation starts and the absorption liquid heated by the auxiliary regenerator through the operation of the pump passes through the intermediate absorption liquid generated by the regenerator An exhaust heat utilization type absorption chiller / heater, which passes through a heat exchanger provided in a part of the exhaust gas and is heated to a temperature at which drain water is not generated from the exhaust gas and flows into the regenerator. Ren water generator prevention method. 前記排熱運転の継続と共に行う前記バーナ運転中に、前記各温度検出手段で検出する温度がそれに対応する前記各基準温度よりも高いか否かを判定し、前記各温度検出手段で検出する温度のうち、少なくとも何れかが前記基準温度よりも低くなった場合には、前記バーナ運転及び前記ポンプの運転を一時的に中止して前記排熱運転のみを行い、その後の前記排熱運転中は、前記各温度検出手段で検出する温度がそれに対応する前記基準温度よりも高いか否かを判定し、前記各温度検出手段で検出する温度のうち、何れかが前記基準温度よりも低い場合には、前記加熱装置のバーナ運転及び前記ポンプの停止状態を持続させたまま前記補助再生器で前記排熱運転させ、前記各温度検出手段で検出する温度が全てそれに対応する基準温度を上回ると、前記加熱装置の前記バーナ運転と前記ポンプの運転を再開することを特徴とする請求項３に記載の排熱利用式吸収冷温水機のドレン水発生防止方法。During the burner operation performed with the continuation of the exhaust heat operation, it is determined whether or not the temperature detected by each temperature detection means is higher than the corresponding reference temperature, and the temperature detected by each temperature detection means When at least one of them becomes lower than the reference temperature, the burner operation and the pump operation are temporarily stopped to perform only the exhaust heat operation, and during the subsequent exhaust heat operation Determining whether the temperature detected by each temperature detecting means is higher than the corresponding reference temperature, and if any of the temperatures detected by each temperature detecting means is lower than the reference temperature The exhaust heat operation is performed by the auxiliary regenerator while maintaining the burner operation of the heating device and the stop state of the pump, and the temperatures detected by the respective temperature detection means are all higher than the corresponding reference temperature. , Drain water prevention method of waste heat utilization type absorption chiller according to claim 3, characterized in that to resume the operation of the burner operation and the pump of the heating device.
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