JP2006071176A - Hot water storage type heat pump water heater - Google Patents

Hot water storage type heat pump water heater Download PDF

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JP2006071176A
JP2006071176A JP2004254870A JP2004254870A JP2006071176A JP 2006071176 A JP2006071176 A JP 2006071176A JP 2004254870 A JP2004254870 A JP 2004254870A JP 2004254870 A JP2004254870 A JP 2004254870A JP 2006071176 A JP2006071176 A JP 2006071176A
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hot water
heat pump
storage tank
temperature
water storage
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JP4134969B2 (en
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Toshihiro Otsubo
寿弘 大坪
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Denso Corp
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Denso Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent the fluctuation of hot water supply temperature to the fluctuation of tapping quantity when hot water is supplied while operating heat pump heat source equipment 1a. <P>SOLUTION: An inlet position switching valve 8 is mounted for switching a return position of the hot water heated up by the heat pump heat source equipment 1a, between a high temperature water inlet portion 7c and a medium temperature water inlet portion 7d of a hot water storage tank 7, and a controller 20 controls each apparatus to tap the hot water heated up to a medium temperature by the heat pump heat source equipment 1a from a medium temperature water outlet portion 7f while returning the hot water from the medium temperature inlet portion 7d depending on the situation. As the medium temperature water in the hot water storage tank 7 acts as a buffer layer, the fluctuation of hot water supply temperature can be prevented, even when hunting occurs on a heated-up temperature immediately after the start of the heat pump heat source equipment 1a or the like, and the significant fluctuation in tapping quantity occurs during tapping, when the hot water is supplied while operating the heat pump heat source equipment 1a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ヒートポンプ熱源機を用いて給湯用水を沸き上げ、貯湯タンクに溜めながら給湯を行う貯湯式ヒートポンプ給湯装置に関するものである。   The present invention relates to a hot water storage type heat pump hot water supply apparatus that uses hot heat pump heat source equipment to boil hot water supply water and supply hot water while storing it in a hot water storage tank.

近年、エネルギー効率の良いヒートポンプ回路を熱源として用いた貯湯式ヒートポンプ給湯装置が普及してきている。この貯湯式ヒートポンプ給湯装置は貯湯タンクを有し、夜間の安価な電力を使って夜中にヒートポンプ回路で湯を沸き上げて貯湯タンクに貯蔵し、貯蔵した湯を日中に使うものが一般的である。   In recent years, hot water storage type heat pump water heaters using an energy efficient heat pump circuit as a heat source have become widespread. This hot water storage type heat pump water heater has a hot water storage tank, and it is common to use hot electricity at night to boil hot water in the heat pump circuit and store it in the hot water storage tank, and use the stored hot water during the day. is there.

熱源にヒートポンプ回路における冷媒の状態変化を利用しているので、電気ヒータによる加熱よりエネルギー効率が数倍良く、また、ガスなどを燃焼しないのでＣＯ２を排出せず地球環境にやさしい給湯装置といわれている。この種の貯湯式ヒートポンプ給湯装置の従来技術として、特許文献１に開示されたものがある。図９は、その従来のヒートポンプ式給湯機の構成を示す模式図であり、これを参照しながら説明する。 Because the heat source uses the state change of the refrigerant in the heat pump circuit, the energy efficiency is several times better than heating by an electric heater, and it is said to be a hot water heater that is friendly to the global environment without discharging CO 2 because it does not burn gas. ing. As a prior art of this type of hot water storage type heat pump hot water supply apparatus, there is one disclosed in Patent Document 1. FIG. 9 is a schematic view showing the configuration of the conventional heat pump type hot water heater, which will be described with reference to this.

圧縮機１、凝縮器２ａ、減圧装置３、および蒸発器４を有するヒートポンプ回路３１と、貯湯槽５、凝縮器２ａで加熱される水熱交換器２ｂ、貯湯槽５の水を水熱交換器２ｂに通して循環させる循環ポンプ６、給水管１６、および給湯管１５を有する給湯部３２と、ヒートポンプ回路３１および給湯部３２を制御する制御部３３とを備えたヒートポンプ式給湯機において、給湯部３２は、小容量の貯湯槽５を有すると共に、貯湯槽５、循環ポンプ６および水熱交換器２ｂからなる貯湯回路と、給水管１６、貯湯槽５および給湯管１５からなる第１の給湯回路と、給水管１６、水熱交換器２ｂおよび給湯管１５からなる第２の給湯回路とを切り換え可能に形成し、制御部３３は、給湯機の状態を検出して貯湯回路、第１の給湯回路および第２の給湯回路を切り換える制御機能と、ヒートポンプ回路３１の運転時に外気温度に応じて圧縮機１の能力を制御する機能とを有するようにしたものである。
特開２００４−０２０１２６号公報 A heat pump circuit 31 having a compressor 1, a condenser 2a, a pressure reducing device 3, and an evaporator 4, a hot water storage tank 5, a water heat exchanger 2b heated by the condenser 2a, and water in the hot water storage tank 5 are converted into a water heat exchanger. In a heat pump type hot water heater comprising a hot water supply section 32 having a circulation pump 6 circulated through 2b, a water supply pipe 16, and a hot water supply pipe 15, and a control section 33 for controlling the heat pump circuit 31 and the hot water supply section 32, a hot water supply section 32 has a small-capacity hot water storage tank 5, a hot water storage circuit including the hot water storage tank 5, the circulation pump 6 and the water heat exchanger 2 b, and a first hot water supply circuit including the water supply pipe 16, the hot water storage tank 5 and the hot water supply pipe 15. And a second hot water supply circuit composed of the water supply pipe 16, the water heat exchanger 2b and the hot water supply pipe 15 are switchable, and the control unit 33 detects the state of the water heater and detects the hot water storage circuit and the first hot water supply. Circuit and second A control function for switching the hot water circuit, in which so as to have a function of controlling the capacity of the compressor 1 in accordance with the outside temperature during operation of the heat pump circuit 31.
JP 2004-020126 A

図１０は、図９の従来のヒートポンプ式給湯機における給湯温度の特性を示すグラフである。このグラフからも分かるように、上記従来の構成でヒートポンプ回路を運転して水熱交換器で加熱された湯を直接給湯管から出湯する場合、ヒートポンプ回路の始動直後は急な沸き上げ温度の立ち上がりに制御が追従できず、設定温度を上回るオーバーシュート現象を生じて高い温度の湯を給湯してしまうなど、給湯温度がハンチングを起こすという問題がある。これは、このような出湯開始時を含め、出湯量が大きく変動したときに起きる問題である。   FIG. 10 is a graph showing characteristics of hot water supply temperature in the conventional heat pump type hot water heater of FIG. As can be seen from this graph, when the heat pump circuit is operated in the above-described conventional configuration and the hot water heated by the water heat exchanger is discharged directly from the hot water supply pipe, a sudden rise in the boiling temperature immediately after the start of the heat pump circuit. There is a problem that the hot water supply temperature causes hunting, for example, an overshoot phenomenon exceeding the set temperature occurs and hot water having a high temperature is supplied. This is a problem that occurs when the amount of hot water fluctuates greatly, including at the start of such hot water.

本発明は、上記従来技術での問題に鑑みて成されたものであり、その目的は、ヒートポンプ熱源機を運転しながら給湯を行う場合において、出湯量の変動に対して給湯温度が変動することを防止することのできる貯湯式ヒートポンプ給湯装置を提供することにある。   The present invention has been made in view of the above-described problems in the prior art, and the purpose thereof is to change the hot water supply temperature with respect to fluctuations in the amount of hot water when hot water is supplied while operating the heat pump heat source machine. It is an object of the present invention to provide a hot water storage type heat pump hot water supply apparatus that can prevent the above.

本発明は上記目的を達成するために、請求項１ないし請求項５に記載の技術的手段を採用する。すなわち、請求項１に記載の発明では、給湯用の高温水を貯湯する貯湯タンク（７）と、冷媒圧縮機（２）・冷媒水熱交換器（３）・冷媒減圧手段（４）および冷媒空気熱交換器（５）を有する冷媒回路（Ｒ）を備えたヒートポンプ熱源機（１ａ）と、貯湯タンク（７）の下部から取り出した低温水をヒートポンプ熱源機（１ａ）によって沸き上げ、その沸き上げた高温水を貯湯タンク（７）の上部に戻す給湯水加熱回路（Ｋ１）と、貯湯タンク（７）の中温水流出部（７ｆ）から導出された中温水取り出し経路（９ａ）と、中温水取り出し経路（９ａ）から取り出した中温水と貯湯タンク（７）の上部から取り出した高温水とを混合して給湯設定温度よりも所定温度だけ高い温度に調節する中温水混合手段（９）と、中温水混合手段（９）から流出する温水と給水路から供給される低温水とを混合して給湯設定温度に調節する給湯混合手段（１０、１１）と、冷媒回路（Ｒ）・給湯水加熱回路（Ｋ１）の循環、および各混合手段（９〜１１）を制御する制御手段（２０）とを備えた貯湯式ヒートポンプ給湯装置において、
ヒートポンプ熱源機（１ａ）で沸き上げた温水の戻し位置を貯湯タンク（７）の高温水流入部（７ｃ）と中温水流入部（７ｄ）とに切り換える流入位置切換手段（８）を設けるとともに、制御手段（２０）は、状況に応じてヒートポンプ熱源機（１ａ）で中温に沸き上げた温水を中温水流入部（７ｄ）から戻しつつ中温水流出部（７ｆ）から出湯するように各機器を制御することを特徴としている。 In order to achieve the above object, the present invention employs technical means described in claims 1 to 5. That is, in the invention described in claim 1, a hot water storage tank (7) for storing hot water for hot water supply, a refrigerant compressor (2), a refrigerant water heat exchanger (3), a refrigerant pressure reducing means (4), and a refrigerant Heat pump heat source machine (1a) having a refrigerant circuit (R) having an air heat exchanger (5) and low-temperature water taken out from the lower part of the hot water storage tank (7) are boiled by the heat pump heat source machine (1a) A hot water supply heating circuit (K1) for returning the raised high temperature water to the upper part of the hot water storage tank (7), an intermediate hot water extraction path (9a) derived from the intermediate temperature water outflow part (7f) of the hot water storage tank (7), Medium temperature water mixing means (9) for mixing the medium temperature water extracted from the hot water extraction path (9a) and the high temperature water extracted from the upper part of the hot water storage tank (7) to adjust the temperature to a temperature higher by a predetermined temperature than the hot water supply set temperature; Medium temperature water mixing means (9) Hot water mixing means (10, 11) for mixing hot water flowing out from the water and low-temperature water supplied from the water supply channel to adjust the hot water supply set temperature, and circulation of the refrigerant circuit (R) / hot water heating circuit (K1), And a hot water storage type heat pump water heater comprising a control means (20) for controlling the mixing means (9 to 11),
Inflow position switching means (8) for switching the return position of the hot water boiled by the heat pump heat source machine (1a) between the hot water inflow part (7c) and the intermediate temperature water inflow part (7d) of the hot water storage tank (7), The control means (20) adjusts each device so that hot water boiled to a medium temperature by the heat pump heat source unit (1a) is discharged from the medium temperature water outflow part (7f) while returning from the medium temperature water inflow part (7d). It is characterized by control.

この請求項１に記載の発明によれば、ヒートポンプ熱源機（１ａ）を運転しながら給湯を行う場合において、ヒートポンプ熱源機（１ａ）が始動直後などで沸き上げ温度にハンチングが生じたり、出湯中に出湯量が大きく変動したりしても、貯湯タンク（７）内の中温水が緩衝層となることより、給湯温度が変動することを防止することができる。また、３５〜６５℃位の低い温で沸き上げ（以下、これを低温沸き上げという）を行いながら給湯も行う（以下、これを直接出湯という）ことで、貯湯タンク（７）は従来のような大容量のものではなく、小型にすることができる。   According to the first aspect of the present invention, when hot water is supplied while the heat pump heat source unit (1a) is operated, the heat pump heat source unit (1a) is hunted at the boiling temperature immediately after starting, etc. Even if the amount of hot water fluctuates greatly, the hot water temperature in the hot water storage tank (7) becomes a buffer layer, so that the hot water supply temperature can be prevented from fluctuating. In addition, the hot water storage tank (7) is as conventional by boiling water at a low temperature of about 35 to 65 ° C. (hereinafter referred to as low temperature boiling) while also supplying hot water (hereinafter referred to as direct hot water). It is not a large-capacity thing and can be made small.

また、昼間は、ヒートポンプ熱源機（１ａ）での沸き上げ温度を下げることにより、ヒートポンプサイクルの成績係数（以下、ＣＯＰと略す）を良くして運転することができる。また、貯湯タンク（７）内に貯蔵されている高温水と混ぜて出湯することもできるので、ヒートポンプ熱源機（１ａ）での沸き上げ温度は給湯設定温度以下にまで下げることができる。   In the daytime, the coefficient of performance (hereinafter abbreviated as COP) of the heat pump cycle can be improved by lowering the boiling temperature in the heat pump heat source unit (1a). Moreover, since it can mix with the hot water stored in the hot water storage tank (7) and can heat out hot water, the boiling temperature in a heat pump heat source machine (1a) can be lowered | hung to below hot water supply preset temperature.

また、請求項２に記載の発明では、貯湯タンク（７）における天地方向の位置関係として、中温水流入部（７ｄ）は中温水流出部（７ｆ）と同じ高さか、もしくは中温水流出部（７ｆ）よりも低い位置に配設していることを特徴としている。この請求項２に記載の発明によれば、このような位置関係とすることにより、貯湯タンク（７）内で中温水流入部（７ｄ）から流入する温水と中温水流出部（７ｆ）から流出する温水との不要な対流による温度分布の乱れを無くすことができ、円滑にヒートポンプ熱源機（１ａ）で沸き上げた湯を出湯させることができる。   In the invention according to claim 2, the hot water storage tank (7) has a top-to-bottom direction positional relationship such that the intermediate warm water inflow portion (7d) is the same height as the intermediate warm water outflow portion (7f) or the intermediate warm water outflow portion ( It is characterized by being disposed at a position lower than 7f). According to the second aspect of the present invention, the hot water flowing in from the intermediate hot water inflow portion (7d) in the hot water storage tank (7) and the outflow from the intermediate hot water outflow portion (7f) can be obtained by such a positional relationship. Therefore, it is possible to eliminate the disturbance of the temperature distribution due to unnecessary convection with the hot water, and to smoothly discharge the hot water boiled up by the heat pump heat source machine (1a).

また、請求項３に記載の発明では、制御手段（２０）は、ヒートポンプ熱源機（１ａ）で沸き上げて中温水流入部（７ｄ）から戻す温水の流量を、中温水流出部（７ｆ）から出湯する流量と同等か、もしくは中温水流出部（７ｆ）から出湯する流量よりも少なくすることを特徴としている。この請求項３に記載の発明によれば、貯湯タンク（７）内に極力中温水を溜めないようにするものであり、これにより沸き上げ時のＣＯＰを向上させることができる。   In the invention according to claim 3, the control means (20) is configured to control the flow rate of the warm water which is boiled by the heat pump heat source unit (1a) and returned from the medium warm water inflow portion (7d) from the medium temperature water outflow portion (7f). It is characterized by being equal to the flow rate of the hot water or less than the flow rate of the hot water discharged from the intermediate temperature water outflow part (7f). According to the third aspect of the present invention, the hot water storage tank (7) is designed to prevent accumulation of medium-temperature water as much as possible, thereby improving the COP at the time of boiling.

また、請求項４に記載の発明では、貯湯タンク（７）において、中温水流入部（７ｄ）と中温水流出部（７ｆ）とを１箇所にまとめて設けたことを特徴としている。この請求項４に記載の発明によれば、貯湯タンク（７）の接続孔を増やすことなく、簡易となりコストを抑えることができる。また、貯湯タンク（７）の放熱ロスも抑えることができる。   In the invention according to claim 4, the hot water storage tank (7) is characterized in that the intermediate temperature water inflow portion (7d) and the intermediate temperature water outflow portion (7f) are provided in one place. According to the fourth aspect of the present invention, the number of connection holes of the hot water storage tank (7) can be simplified and the cost can be reduced. Moreover, the heat loss of the hot water storage tank (7) can also be suppressed.

また、請求項５に記載の発明では、貯湯タンク（７）内に温水を流入させるための温水流入部材（１２）と貯湯タンク（７）内から温水を流出させるための温水流出部材（１３）とを一体にして温水流入出部材（１４）として貯湯タンク（７）の壁面に設けるとともに、
温水流入部材（１２）からの温水は温水流入出部材（１４）の天地方向中央より下側で水平方向、もしくはそれよりも下側へ向けて吐出され、温水流出部材（１３）への温水は温水流入出部材（１４）の天地方向中央より上側で水平方向、もしくはそれよりも上側から吸入されることを特徴としている。 Moreover, in invention of Claim 5, the hot water inflow member (12) for making warm water flow in into a hot water storage tank (7), and the hot water outflow member (13) for making warm water flow out from the inside of a hot water storage tank (7) And a hot water inflow / outflow member (14) on the wall surface of the hot water storage tank (7),
The hot water from the hot water inflow member (12) is discharged downward from the center of the hot water inflow / outflow member (14) in the horizontal direction or downward, and the hot water to the hot water outflow member (13) is The hot water inflow / outflow member (14) is sucked in from the horizontal direction above the center in the vertical direction, or from the upper side.

この請求項５に記載の発明によれば、温水流入部材（１２）から流入する温水と温水流出部材（１３）から流出する温水との不要な対流による温度分布の乱れを無くすことができる。ちなみに、上記各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示す一例である。   According to the fifth aspect of the present invention, it is possible to eliminate disturbance in temperature distribution due to unnecessary convection between the hot water flowing in from the hot water inflow member (12) and the hot water flowing out from the hot water outflow member (13). Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with the specific means described in the embodiments described later.

（第１実施形態）
以下、本発明の実施の形態について図面を用いて詳細に説明する。図１は、本発明の第１実施形態における貯湯式ヒートポンプ給湯装置１の全体構成を示す模式図である。本実施形態の貯湯式ヒートポンプ給湯装置１は、超臨界ヒートポンプサイクルを用いて給湯用水を、夜間は６５〜９０℃位の高温で沸き上げて、その高温水を貯湯タンク７に貯蔵しておくとともに、昼間は貯湯タンク７内の中温水から優先的に使って出湯し、夕方などの給湯量のピーク時間帯には、３５〜６５℃位の低温沸き上げを行いながら給湯も行うものである。 (First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an overall configuration of a hot water storage type heat pump water heater 1 according to a first embodiment of the present invention. The hot water storage type heat pump hot water supply apparatus 1 of the present embodiment uses a supercritical heat pump cycle to boil hot water at a high temperature of about 65 to 90 ° C. at night and store the high temperature water in the hot water storage tank 7. In the daytime, the hot water is used preferentially from the medium temperature water in the hot water storage tank 7, and hot water is supplied while performing boiling at a low temperature of about 35 to 65 ° C. during peak hours of the hot water supply amount such as evening.

そのため、貯湯タンク７は従来のような大容量のものではなく、小型となっている。尚、超臨界ヒートポンプサイクルとは、高圧側の冷媒圧力が冷媒の臨界圧力以上となるヒートポンプサイクルをいい、例えば二酸化炭素・エチレン・エタン・酸化窒素などを冷媒とするヒートポンプサイクルである。給湯装置１は大きく分けて、主に後述する冷凍サイクル機器が収納されたヒートポンプ熱源機１ａと、主に貯湯タンク７が収納されたタンクユニット１ｂとよりなる。   Therefore, the hot water storage tank 7 is not a large-capacity one as in the prior art, but is small. The supercritical heat pump cycle refers to a heat pump cycle in which the refrigerant pressure on the high pressure side is equal to or higher than the critical pressure of the refrigerant. For example, the heat pump cycle uses carbon dioxide, ethylene, ethane, nitrogen oxide or the like as the refrigerant. The hot water supply apparatus 1 is roughly divided into a heat pump heat source unit 1a that mainly stores refrigeration cycle equipment, which will be described later, and a tank unit 1b that mainly stores a hot water storage tank 7.

また、ヒートポンプ熱源機１ａ内は、大きく分けてヒートポンプサイクルの冷媒回路Ｒと、給湯関係の給湯水加熱回路Ｋ１とで構成されている。まず冷媒回路Ｒは、冷媒を圧縮する冷媒圧縮機２と、給湯用水の加熱手段である冷媒水熱交換器３と、冷媒減圧手段である膨張弁４と、大気から吸熱するための冷媒空気熱交換器５とを環状に接続して構成され、冷媒として臨界温度の低い二酸化炭素（以下、ＣＯ２と略す）が封入されている。 The heat pump heat source unit 1a is roughly divided into a refrigerant circuit R for a heat pump cycle and a hot water supply heating circuit K1 for hot water supply. First, the refrigerant circuit R includes a refrigerant compressor 2 that compresses refrigerant, a refrigerant water heat exchanger 3 that is a heating means for hot water supply, an expansion valve 4 that is a refrigerant decompression means, and refrigerant air heat that absorbs heat from the atmosphere. The exchanger 5 is connected in a ring shape, and carbon dioxide (hereinafter abbreviated as CO 2 ) having a low critical temperature is enclosed as a refrigerant.

冷媒圧縮機２は、内蔵する駆動モータと、吸引したガス冷媒を臨界圧力以上の高圧にまで昇圧して吐出する高圧圧縮部とで構成しており、これらが密閉容器内に収納されている。そして、装置全体の制御手段である制御装置２０により通電制御される。冷媒水熱交換器３は、高圧圧縮部で昇圧された高温高圧のガス冷媒と給湯用水とを熱交換して給湯用水を加熱するもので、高圧冷媒通路３ａに隣接して給湯水通路３ｂが設けられ、その高圧冷媒通路３ａを流れる冷媒の流れ方向と給湯水通路３ｂを流れる給湯用水の流れ方向とが対向するように構成されている。   The refrigerant compressor 2 includes a built-in drive motor and a high-pressure compressor that discharges the sucked gas refrigerant to a high pressure equal to or higher than the critical pressure, and these are housed in a sealed container. Then, energization control is performed by the control device 20 which is a control means of the entire device. The refrigerant water heat exchanger 3 heats hot water by exchanging heat between the high-temperature and high-pressure gas refrigerant boosted by the high-pressure compressor and the hot-water supply water. The hot-water supply passage 3b is adjacent to the high-pressure refrigerant passage 3a. The flow direction of the refrigerant flowing through the high-pressure refrigerant passage 3a is opposed to the flow direction of hot water flowing through the hot water supply passage 3b.

膨張弁４は、冷媒水熱交換器３と冷媒空気熱交換器５との間に設けられ、冷媒水熱交換器３で冷却された冷媒を高圧から低圧まで減圧して冷媒空気熱交換器５に供給する。また、この膨張弁４は、弁開度を電気的に調整可能な構成を有し、制御装置２０により通電制御される。冷媒空気熱交換器５は、図示しない送風ファンによる送風を受けて、膨張弁４で減圧された冷媒を大気との熱交換によって蒸発させ、ガスとなった冷媒は先の冷媒圧縮機２に吸引される。   The expansion valve 4 is provided between the refrigerant water heat exchanger 3 and the refrigerant air heat exchanger 5, and depressurizes the refrigerant cooled by the refrigerant water heat exchanger 3 from high pressure to low pressure. To supply. Further, the expansion valve 4 has a configuration capable of electrically adjusting the valve opening degree, and is energized and controlled by the control device 20. The refrigerant air heat exchanger 5 receives air blown by a blower fan (not shown), evaporates the refrigerant decompressed by the expansion valve 4 by heat exchange with the atmosphere, and the refrigerant that has become a gas is sucked into the refrigerant compressor 2. Is done.

給湯関係の給湯水加熱回路Ｋ１は、給湯用水の加熱手段である上記冷媒水熱交換器３の給湯水通路３ｂと、給湯用水を循環させる循環ポンプ６と、給湯用水を貯留する貯湯タンク７とを環状に接続して構成される。循環ポンプ６は、図１に示すように、貯湯タンク７内の下部に設けられた低温水流出部７ｂから冷水を冷媒水熱交換器３の給湯水通路３ｂを通して貯湯タンク７の上部に設けられた高温水流入部７ｃから還流する様に水流を発生させる。この給湯水循環ポンプ６は、内蔵するモータの回転数に応じて流水量を調節することができ、制御装置２０により通電制御される。   A hot water supply heating circuit K1 related to hot water supply includes a hot water supply passage 3b of the refrigerant water heat exchanger 3 serving as heating means for hot water supply, a circulation pump 6 for circulating hot water supply water, and a hot water storage tank 7 for storing hot water supply water. Are connected in a ring shape. As shown in FIG. 1, the circulation pump 6 is provided in the upper part of the hot water storage tank 7 through the hot water passage 3 b of the refrigerant water heat exchanger 3 from the low temperature water outflow portion 7 b provided in the lower part of the hot water storage tank 7. A water flow is generated so as to recirculate from the high temperature water inflow portion 7c. The hot water circulation pump 6 can adjust the amount of flowing water according to the number of rotations of a built-in motor, and is energized and controlled by the control device 20.

尚、本発明の要部の一つとして、冷媒水熱交換器３と貯湯タンク７との間の給湯水加熱回路Ｋ１に、ヒートポンプ熱源機１ａで沸き上げた温水の戻し位置を貯湯タンク７上部の高温水流入部７ｃと、貯湯タンク７中間部の中温水流入部７ｄとに切り換える流入位置切換手段としての流入位置切換弁８を設けており、この流入位置切換弁８も制御装置２０により通電制御される。   As one of the essential parts of the present invention, the hot water heating circuit K1 between the refrigerant water heat exchanger 3 and the hot water storage tank 7 is provided with the return position of the hot water boiled by the heat pump heat source unit 1a. An inflow position switching valve 8 is provided as an inflow position switching means for switching between the high temperature water inflow portion 7c and the intermediate temperature water inflow portion 7d in the middle of the hot water storage tank 7, and this inflow position switching valve 8 is also energized by the control device 20. Be controlled.

貯湯タンク７は、耐蝕性に優れた金属製（例えばステンレス製）で断熱構造を有し、高温の給湯用水を長時間にわたって保温することができる。また、貯湯タンク７の側面には垂直方向に多数個（例えば、２０リットル刻みに８個）の図示しないサーミスタが配設されており、貯湯タンク７内各高さ位置での温度を検出できるようになっている。このサーミスタ群で検出される温度より貯湯タンク７に貯蔵されている熱量計算を行い、夕方などの直接出湯（沸き上げながらの出湯）への制御、後述する学習制御、沸き上げ制御などに使用される。   The hot water storage tank 7 is made of metal (for example, made of stainless steel) excellent in corrosion resistance and has a heat insulating structure, and can keep hot hot water for a long time. In addition, a large number of thermistors (not shown) are arranged in the vertical direction on the side surface of the hot water tank 7 (for example, eight in 20 liter increments) so that the temperature at each height position in the hot water tank 7 can be detected. It has become. Calculates the amount of heat stored in the hot water storage tank 7 from the temperature detected by this thermistor group, and is used for control to direct hot water (hot water while boiling) in the evening, learning control, and boiling control described later. The

貯湯タンク７に貯留された給湯用水の出湯回路として、貯湯タンク７上部の高温水流出部７ｅから取り出した高温水と、貯湯タンク７中間部の中温水流出部７ｆからの中温水取り出し経路９ａにて取り出した中温水とを混合して、給湯設定温度よりも所定温度だけ高い温度に調節する中温水混合手段としての中温水紺合弁９を備えている。   As a hot water supply circuit for hot water stored in the hot water storage tank 7, high temperature water taken out from the high temperature water outflow portion 7e above the hot water storage tank 7 and intermediate temperature water extraction path 9a from the intermediate temperature water outflow portion 7f in the intermediate portion of the hot water storage tank 7 are provided. The intermediate-temperature water mixing valve 9 is provided as an intermediate-temperature water mixing means for mixing the intermediate-temperature water taken out and adjusting it to a temperature higher than the hot water supply set temperature by a predetermined temperature.

また、中温水混合弁９から流出する温水と給水路から供給される低温水とを混合して給湯設定温度に調節する給湯混合手段としての給湯混合弁１０と風呂混合弁１１とを備えており、各操作パネルで設定された給湯設定温度に温度調節された湯は、主に台所や風呂などに給湯される。尚、給湯混合弁１０・風呂混合弁１１も制御装置２０により通電制御される。   Further, a hot water mixing valve 10 and a bath mixing valve 11 are provided as hot water mixing means for mixing hot water flowing out from the intermediate hot water mixing valve 9 and low-temperature water supplied from the water supply channel to adjust the hot water supply setting temperature. The hot water whose temperature is adjusted to the hot water supply set temperature set on each operation panel is mainly supplied to a kitchen or a bath. The hot water mixing valve 10 and the bath mixing valve 11 are also energized and controlled by the control device 20.

次に、本貯湯式ヒートポンプ給湯装置１の作動の概略を説明する。夜間の深夜電力時間帯を使い、ヒートポンプ熱源機１ａで貯湯タンク７内の給湯用水を沸き上げ、貯湯タンク７上部の高温水流入部７ｃから貯湯を行う。このときの沸き上げ温度は６５℃〜９０℃である。この沸き上げ温度は、操作パネルでの設定温度は家庭毎に異なるが、４３℃の固定値として使用量を学習し、その使用量から沸き上げ温度が決められる。そして、深夜電力時間帯が終了する７時に沸き上げが完了するよう、ヒートポンプ熱源機１ａでの沸き上げ開始時間が調整される。   Next, an outline of the operation of the hot water storage type heat pump water heater 1 will be described. The hot water supply water in the hot water storage tank 7 is boiled by the heat pump heat source unit 1a using the nighttime midnight power time zone, and hot water is stored from the high temperature water inflow portion 7c above the hot water storage tank 7. The boiling temperature at this time is 65 ° C to 90 ° C. The boiling temperature is different from household to household, but the usage amount is learned as a fixed value of 43 ° C., and the boiling temperature is determined from the usage amount. And the boiling start time in the heat pump heat source unit 1a is adjusted so that the boiling is completed at 7:00 when the midnight power time period ends.

昼間は、貯湯タンク７内に貯湯してある高温水を給湯混合弁１０で温度調節して給湯するが、給湯や放熱により貯湯タンク７内に温度分布が生じ、中温水流出部７ｆよりも下方のサーミスタの温度が所定値以下に下がった場合は低温沸き上げを行って中温水を蓄える。   During the daytime, hot water stored in the hot water storage tank 7 is heated by adjusting the temperature with the hot water supply mixing valve 10, but the temperature distribution is generated in the hot water storage tank 7 due to hot water supply and heat dissipation, and below the intermediate hot water outlet 7f. When the temperature of the thermistor falls below a predetermined value, the medium temperature water is stored by boiling at a low temperature.

また、夕方などのお湯を大量に使う給湯量ピーク時間帯には、沸き上げ温度を３５〜６５℃程度に下げ、出湯を検知するとヒートポンプ熱源機１ａを低温沸き上げにて運転し、貯湯タンク７中間部の中温水流入部７ｄに戻すとともに、貯湯タンク７中間部の中温水流出部７ｆから直接出湯を行う。尚、給湯量ピーク時間帯は、図示しない流量センサーにて各家庭の時間毎の出湯パターンを学習して決めている。   Also, during the hot water supply peak time period when a large amount of hot water such as evening is used, the boiling temperature is lowered to about 35 to 65 ° C., and when the hot water is detected, the heat pump heat source unit 1a is operated at low temperature boiling, and the hot water storage tank 7 While returning to the middle temperature warm water inflow section 7d, the hot water is directly discharged from the middle temperature water outflow section 7f of the hot water storage tank 7. Note that the hot water supply peak time zone is determined by learning a hot water discharge pattern for each household at a flow rate sensor (not shown).

また、このときに中温水混合弁９出口の図示しないサーミスタでの温度を検出し、フィードバック制御により操作パネル設定温度より５℃高くなるよう弁開度を制御する。中温水混合弁９の待機方向は中温水流出部７ｆのサーミスタにより温度を検出し、所定温度以上ならば中温水を優先的に取り出すように制御している。   Further, at this time, the temperature of a thermistor (not shown) at the outlet of the intermediate temperature water mixing valve 9 is detected, and the valve opening degree is controlled by feedback control so as to be 5 ° C. higher than the operation panel set temperature. The standby direction of the intermediate temperature water mixing valve 9 is controlled so that the temperature is detected by a thermistor of the intermediate temperature water outflow portion 7f and the intermediate temperature water is preferentially taken out if the temperature is equal to or higher than a predetermined temperature.

中温水流入部７ｄと中温水流出部７ｆとの位置関係は、同等高さ、もしくは中温水流入部７ｄの方を低くして貯湯タンク７の側面に対向するように設けている。また、貯湯タンク７内に流入させる中温水の流量は、貯湯タンク７から出湯される中温水の流量と同等か、もしくは流入させる中温水の流量の方が少なめになるよう制御を行っている。   The positional relationship between the intermediate-temperature water inflow portion 7d and the intermediate-temperature water outflow portion 7f is provided so as to face the side surface of the hot water storage tank 7 with the same height or the intermediate-temperature water inflow portion 7d being lower. Control is performed so that the flow rate of the medium-temperature water flowing into the hot water storage tank 7 is equal to or less than the flow rate of the medium-temperature water discharged from the hot-water storage tank 7.

次に、本実施形態での特徴と、その効果について述べる。まず、ヒートポンプ熱源機１ａで沸き上げた温水の戻し位置を貯湯タンク７の高温水流入部７ｃと中温水流入部７ｄとに切り換える流入位置切換弁８を設けるとともに、制御手段２０は、状況に応じてヒートポンプ熱源機１ａで中温に沸き上げた温水を中温水流入部７ｄから戻しつつ中温水流出部７ｆから出湯するように各機器を制御するようにしている。   Next, features and effects of this embodiment will be described. First, an inflow position switching valve 8 is provided for switching the return position of the hot water boiled by the heat pump heat source unit 1a to the high temperature water inflow portion 7c and the intermediate temperature water inflow portion 7d of the hot water storage tank 7, and the control means 20 is provided according to the situation. Thus, each device is controlled such that hot water boiled to a medium temperature by the heat pump heat source device 1a is discharged from the medium temperature water inflow portion 7f while returning from the medium temperature water inflow portion 7d.

これによれば、このようなヒートポンプ熱源機１ａを運転しながら給湯を行う場合において、ヒートポンプ熱源機１ａが始動直後などで沸き上げ温度にハンチングが生じたり、出湯中に出湯量が大きく変動したりしても、貯湯タンク７内の中温水が緩衝層となることより、給湯温度が変動することを防止することができる。また、３５〜６５℃位の低温沸き上げを行いながら給湯も行う直接出湯により、貯湯タンク７は従来のような大容量のものではなく、小型にすることができる。   According to this, in the case of supplying hot water while operating such a heat pump heat source unit 1a, hunting occurs in the boiling temperature immediately after the heat pump heat source unit 1a is started, or the amount of discharged hot water greatly fluctuates during tapping. Even so, it is possible to prevent the hot water supply temperature from fluctuating since the medium temperature water in the hot water storage tank 7 becomes a buffer layer. Further, the hot water storage tank 7 is not of a large capacity as in the prior art, but can be reduced in size by direct hot water supply in which hot water is supplied while performing boiling at a low temperature of about 35 to 65 ° C.

図２は、ヒートポンプ熱源機１ａにおける沸き上げ温度とＣＯＰとの関係を示すグラフである。このグラフからも分かるように、昼間は、ヒートポンプ熱源機１ａでの沸き上げ温度を下げることにより、ヒートポンプサイクルのＣＯＰを良くして運転することができる。また、貯湯タンク７内に貯蔵されている高温水と混ぜて出湯することもできるので、ヒートポンプ熱源機１ａでの沸き上げ温度は給湯設定温度以下にまで下げることができる。   FIG. 2 is a graph showing the relationship between the boiling temperature and the COP in the heat pump heat source apparatus 1a. As can be seen from this graph, during the daytime, the COP of the heat pump cycle can be improved by lowering the boiling temperature in the heat pump heat source unit 1a. Further, since hot water can be mixed with high-temperature water stored in the hot water storage tank 7, the boiling temperature in the heat pump heat source unit 1a can be lowered to a hot water supply set temperature or lower.

また、貯湯タンク７における天地方向の位置関係として、中温水流入部７ｄは中温水流出部７ｆと同じ高さか、もしくは中温水流出部７ｆよりも低い位置に配設している。これによれば、このような位置関係とすることにより、貯湯タンク７内で中温水流入部７ｄから流入する温水と中温水流出部７ｆから流出する温水との不要な対流による温度分布の乱れを無くすことができ、円滑にヒートポンプ熱源機１ａで沸き上げた湯を出湯させることができる。   Further, as the positional relationship in the vertical direction in the hot water storage tank 7, the intermediate warm water inflow portion 7d is disposed at the same height as the intermediate warm water outflow portion 7f or at a position lower than the intermediate warm water outflow portion 7f. According to this, by such a positional relationship, the temperature distribution is disturbed due to unnecessary convection between the hot water flowing in from the intermediate hot water inflow portion 7d and the hot water flowing out from the intermediate hot water outflow portion 7f in the hot water storage tank 7. The hot water boiled up by the heat pump heat source machine 1a can be discharged smoothly.

また、制御装置２０は、ヒートポンプ熱源機１ａで沸き上げて中温水流入部７ｄから戻す温水の流量を、中温水流出部７ｆから出湯する流量と同等か、もしくは中温水流出部７ｆから出湯する流量よりも少なくするようにしている。これは、貯湯タンク７内に極力中温水を溜めないようにするものであり、これにより沸き上げ時のＣＯＰを向上させることができる。   Moreover, the control apparatus 20 makes the flow rate of the hot water boiled by the heat pump heat source unit 1a and returned from the intermediate warm water inflow portion 7d equal to the flow rate of the hot water discharged from the intermediate warm water outflow portion 7f, or the flow rate discharged from the intermediate warm water outflow portion 7f. I try to make it less. This prevents intermediate hot water from being accumulated in the hot water storage tank 7 as much as possible, thereby improving the COP at the time of boiling.

（第２実施形態）
図３は、本発明の第２実施形態における貯湯式ヒートポンプ給湯装置の構成を示す模式図である。上述した第１実施形態と異なる特徴は、貯湯タンク７において、中温水流入部７ｄと中温水流出部７ｆとを１箇所にまとめて設けている点である。これによれば、貯湯タンク７の接続孔を増やすことなく、簡易となりコストを抑えることができる。また、貯湯タンク７の放熱ロスも抑えることができる。 (Second Embodiment)
FIG. 3 is a schematic diagram showing a configuration of a hot water storage type heat pump water heater in the second embodiment of the present invention. A feature different from the first embodiment described above is that the hot water storage tank 7 is provided with the intermediate warm water inflow portion 7d and the intermediate warm water outflow portion 7f in one place. According to this, it becomes simple and can suppress cost, without increasing the connection hole of the hot water storage tank 7. FIG. Moreover, the heat loss of the hot water storage tank 7 can also be suppressed.

図４は、図２中Ａ部に設けた温水流入出部材としての温水流入出管１４Ａを示す断面図であり、温水流入部材を直管の温水流入管１２Ａと、温水流出部材も直管の温水流出管１３Ａとで構成したものである。また、図５は、図２中Ａ部に設けた温水流入出管１４Ｂを示す断面図であり、温水流入部材を円管の温水流入管１２Ｂと、温水流出部材を直管の温水流出管１３Ａとで構成したものである。また、図６は、図２中Ａ部に設けた温水流入出管１４Ｃを示す断面図であり、温水流入部材を円管の温水流入管１２Ｂと、温水流出部材も円管の温水流出管１３Ｂとで構成したものである。そして、温水流入管１２と温水流出管１３とはいずれも多穴構造となっている。   FIG. 4 is a cross-sectional view showing a hot water inflow / outflow pipe 14A as a hot water inflow / outflow member provided in section A in FIG. 2. The hot water inflow member is a straight hot water inflow pipe 12A, and the hot water outflow member is also a straight pipe. This is composed of a hot water outlet pipe 13A. FIG. 5 is a cross-sectional view showing the hot water inflow / outflow pipe 14B provided at the portion A in FIG. 2. The hot water inflow member is a circular hot water inflow pipe 12B, and the hot water outflow member is a straight hot water outflow pipe 13A. It is composed of. 6 is a cross-sectional view showing the hot water inflow / outflow pipe 14C provided at the portion A in FIG. 2. The hot water inflow member is a circular hot water inflow pipe 12B, and the hot water outflow member is also a circular hot water outflow pipe 13B. It is composed of. The hot water inflow pipe 12 and the hot water outflow pipe 13 both have a multi-hole structure.

そしていずれも、貯湯タンク７内に温水を流入させるための温水流入管１２と貯湯タンク７内から温水を流出させるための温水流出管１３とを一体にして温水流入出管１４として貯湯タンク７の壁面に設けるとともに、温水流入管１２からの温水は温水流入出管１４の天地方向中央より下側で水平方向、もしくはそれよりも下側へ向けて吐出され、温水流出管１３への温水は温水流入出管１４の天地方向中央より上側で水平方向、もしくはそれよりも上側から吸入されるようにしている。これによれば、温水流入管１２から流入する温水と温水流出管１３から流出する温水との不要な対流による温度分布の乱れを無くすことができる。   In either case, the hot water inflow pipe 12 for allowing hot water to flow into the hot water storage tank 7 and the hot water outflow pipe 13 for allowing hot water to flow out of the hot water storage tank 7 are integrated into a hot water inflow / outflow pipe 14 of the hot water storage tank 7. While being provided on the wall surface, the hot water from the hot water inflow pipe 12 is discharged from the center in the vertical direction of the hot water inflow / outflow pipe 14 to the horizontal direction or downward, and the hot water to the hot water outflow pipe 13 is warm water. The inflow and outflow pipes 14 are sucked in from the horizontal direction above the center in the vertical direction or from the upper side. According to this, the disturbance of the temperature distribution due to unnecessary convection between the hot water flowing in from the hot water inflow pipe 12 and the hot water flowing out from the hot water outflow pipe 13 can be eliminated.

（他の実施形態１）
図７は、本発明の他の実施形態１における貯湯式ヒートポンプ給湯装置の構成を示す模式図である。１５は浴槽、１６は貯湯タンク７内の上方側に設けられて貯湯タンク７内の高温水で浴水を加熱する追い焚き用熱交換器、Ｙは浴水循環路、１７は浴水を循環させるための循環ポンプである。このように、本発明の貯湯式ヒートポンプ給湯装置は他の加熱回路用の熱交換器を貯湯タンク７内に内蔵する構成であっても良い。 (Other embodiment 1)
FIG. 7 is a schematic diagram showing a configuration of a hot water storage type heat pump hot water supply apparatus according to another embodiment 1 of the present invention. 15 is a bathtub, 16 is a heat exchanger for reheating that is provided above the hot water tank 7 and heats the hot water in the hot water tank 7, Y is a bath water circuit, and 17 is used to circulate the bath water. It is a circulation pump for. Thus, the hot water storage type heat pump hot water supply apparatus of the present invention may have a configuration in which a heat exchanger for another heating circuit is built in the hot water storage tank 7.

（他の実施形態２）
図８は、本発明の他の実施形態２における貯湯式ヒートポンプ給湯装置の構成を示す模式図である。１５は浴槽、１８は浴水を加熱する追い焚き用熱交換器、Ｙは浴水循環路、１７は浴水を循環させるための循環ポンプである。図７の構成と異なるのは、貯湯タンク７上部の高温水流出部７ｇから高温水を取り出して追い焚き用熱交換器１８の高温水通路８ａを通して貯湯タンク７の下部の中温水流入部７ｈに戻す流体加熱回路Ｋ２を設けている点である。尚、１９は流体加熱回路Ｋ２に熱源水を循環させる熱源水循環ポンプである。 (Other embodiment 2)
FIG. 8 is a schematic diagram showing a configuration of a hot water storage type heat pump hot water supply apparatus according to another embodiment 2 of the present invention. 15 is a bathtub, 18 is a reheating heat exchanger for heating the bath water, Y is a bath water circuit, and 17 is a circulation pump for circulating the bath water. 7 is different from the configuration of FIG. 7 in that high temperature water is taken out from the high temperature water outflow portion 7g at the top of the hot water storage tank 7 and passed through the high temperature water passage 8a of the reheating heat exchanger 18 to the intermediate temperature water inflow portion 7h at the bottom of the hot water storage tank 7. The fluid heating circuit K2 for returning is provided. Reference numeral 19 denotes a heat source water circulation pump for circulating the heat source water in the fluid heating circuit K2.

また、追い焚き用熱交換器１８は、貯湯タンク７に貯留された高温水と浴水とを熱交換して浴水を加熱（追い焚き）するもので、高温水通路１８ａに隣接して流体通路１８ｂが設けられ、その高温水通路８ａを流れる高温水の流れ方向と流体通路１８ｂを流れる流体の流れ方向とが対向するように構成されている。このように、本発明の貯湯式ヒートポンプ給湯装置は貯湯タンク７に他の加熱回路を持つ構成であっても良い。尚、この加熱回路は浴水の追い焚きに限らず、暖房・乾燥・保温などに用いるブラインを加熱するブライン加熱回路であっても良い。   The reheating heat exchanger 18 heats (repels) the bath water by exchanging heat between the high-temperature water stored in the hot water storage tank 7 and the bath water, and is adjacent to the high-temperature water passage 18a. A passage 18b is provided, and the flow direction of the high-temperature water flowing through the high-temperature water passage 8a is opposed to the flow direction of the fluid flowing through the fluid passage 18b. Thus, the hot water storage type heat pump hot water supply apparatus of the present invention may have a configuration in which the hot water storage tank 7 has another heating circuit. Note that this heating circuit is not limited to the reheating of bath water, and may be a brine heating circuit for heating brine used for heating, drying, heat retention, and the like.

（その他の実施形態）
上述の実施形態では、給湯用水を加熱するヒートポンプサイクルにＣＯ２冷媒を用いた超臨界ヒートポンプサイクルを用いているが、本発明は上述した実施形態に限定されるものではなく、例えばフロン冷媒を用いたヒートポンプサイクルなどであっても良い。また、冷媒減圧手段として膨張弁を用いているが、エジェクタをはじめとする他の冷媒減圧手段を用いたヒートポンプサイクルであっても良い。 (Other embodiments)
In the above-described embodiment, the supercritical heat pump cycle using the CO 2 refrigerant is used for the heat pump cycle for heating the hot water supply water. However, the present invention is not limited to the above-described embodiment. It may be a heat pump cycle. Moreover, although the expansion valve is used as the refrigerant pressure reducing means, a heat pump cycle using other refrigerant pressure reducing means such as an ejector may be used.

本発明の第１実施形態における貯湯式ヒートポンプ給湯装置１の全体構成を示す模式図である。It is a mimetic diagram showing the whole hot water storage type heat pump hot-water supply apparatus 1 in a 1st embodiment of the present invention. ヒートポンプ熱源機１ａにおける沸き上げ温度と成績係数（ＣＯＰ）との関係を示すグラフである。It is a graph which shows the relationship between the boiling temperature and coefficient of performance (COP) in the heat pump heat source machine 1a. 本発明の第２実施形態における貯湯式ヒートポンプ給湯装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the hot water storage type heat pump hot-water supply apparatus in 2nd Embodiment of this invention. 図２中Ａ部の構造例１４Ａを示す断面図である。It is sectional drawing which shows the structural example 14A of the A section in FIG. 図２中Ａ部の構造例１４Ｂを示す断面図である。It is sectional drawing which shows the structural example 14B of the A section in FIG. 図２中Ａ部の構造例１４Ｃを示す断面図である。It is sectional drawing which shows the structural example 14C of the A section in FIG. 本発明の他の実施形態１における貯湯式ヒートポンプ給湯装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the hot water storage type heat pump hot-water supply apparatus in other Embodiment 1 of this invention. 本発明の他の実施形態２における貯湯式ヒートポンプ給湯装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the hot water storage type heat pump hot-water supply apparatus in other Embodiment 2 of this invention. 従来のヒートポンプ式給湯機の構成を示す模式図である。It is a schematic diagram which shows the structure of the conventional heat pump type water heater. 図９の従来のヒートポンプ式給湯機における給湯温度の特性を示すグラフである。It is a graph which shows the characteristic of the hot water supply temperature in the conventional heat pump type hot water heater of FIG.

符号の説明Explanation of symbols

１ａ…ヒートポンプ熱源機
２…冷媒圧縮機
３…冷媒水熱交換器
４…膨張弁（冷媒減圧手段）
５…冷媒空気熱交換器
７…貯湯タンク
７ｃ…高温水流入部
７ｄ…中温水流入部
７ｆ…中温水流出部
８…流入位置切換弁（流入位置切換手段）
９…中温水混合弁（中温水混合手段）
９ａ…中温水取り出し経路
１０…給湯混合弁（給湯混合手段）
１１…風呂混合弁（給湯混合手段）
１２…温水流入管（温水流入部材）
１３…温水流出管（温水流出部材）
１４…温水流入出管（温水流入出部材）
２０…制御装置（制御手段）
Ｋ１…給湯水加熱回路
Ｒ…冷媒回路 DESCRIPTION OF SYMBOLS 1a ... Heat pump heat source machine 2 ... Refrigerant compressor 3 ... Refrigerant water heat exchanger 4 ... Expansion valve (refrigerant decompression means)
DESCRIPTION OF SYMBOLS 5 ... Refrigerant air heat exchanger 7 ... Hot water storage tank 7c ... High temperature water inflow part 7d ... Medium temperature water inflow part 7f ... Medium temperature water outflow part 8 ... Inflow position switching valve (inflow position switching means)
9 ... Medium warm water mixing valve (medium warm water mixing means)
9a ... Medium hot water extraction path 10 ... Hot water mixing valve (hot water mixing means)
11 ... Bath mixing valve (hot water mixing means)
12 ... Hot water inflow pipe (hot water inflow member)
13 ... Hot water outflow pipe (hot water outflow member)
14 ... Hot water inflow / outflow pipe (hot water inflow / outlet member)
20 ... Control device (control means)
K1 ... Hot water supply heating circuit R ... Refrigerant circuit

Claims (5)

給湯用の高温水を貯湯する貯湯タンク（７）と、
冷媒圧縮機（２）・冷媒水熱交換器（３）・冷媒減圧手段（４）および冷媒空気熱交換器（５）を有する冷媒回路（Ｒ）を備えたヒートポンプ熱源機（１ａ）と、
前記貯湯タンク（７）の下部から取り出した低温水を前記ヒートポンプ熱源機（１ａ）によって沸き上げ、その沸き上げた高温水を前記貯湯タンク（７）の上部に戻す給湯水加熱回路（Ｋ１）と、
前記貯湯タンク（７）の中温水流出部（７ｆ）から導出された中温水取り出し経路（９ａ）と、前記中温水取り出し経路（９ａ）から取り出した中温水と前記貯湯タンク（７）の上部から取り出した高温水とを混合して給湯設定温度よりも所定温度だけ高い温度に調節する中温水混合手段（９）と、
前記中温水混合手段（９）から流出する温水と給水路から供給される低温水とを混合して給湯設定温度に調節する給湯混合手段（１０、１１）と、
前記冷媒回路（Ｒ）・前記給湯水加熱回路（Ｋ１）の循環、および各混合手段（９〜１１）を制御する制御手段（２０）とを備えた貯湯式ヒートポンプ給湯装置において、
前記ヒートポンプ熱源機（１ａ）で沸き上げた温水の戻し位置を前記貯湯タンク（７）の高温水流入部（７ｃ）と中温水流入部（７ｄ）とに切り換える流入位置切換手段（８）を設けるとともに、
前記制御手段（２０）は、状況に応じて前記ヒートポンプ熱源機（１ａ）で中温に沸き上げた温水を前記中温水流入部（７ｄ）から戻しつつ前記中温水流出部（７ｆ）から出湯するように前記各機器を制御することを特徴とする貯湯式ヒートポンプ給湯装置。 A hot water storage tank (7) for storing hot water for hot water supply;
A heat pump heat source machine (1a) comprising a refrigerant circuit (R) having a refrigerant compressor (2), a refrigerant water heat exchanger (3), a refrigerant decompression means (4) and a refrigerant air heat exchanger (5);
A hot water heating circuit (K1) for boiling low temperature water taken out from the lower part of the hot water storage tank (7) by the heat pump heat source unit (1a) and returning the heated hot water to the upper part of the hot water storage tank (7); ,
From the hot water storage tank (7), the intermediate temperature water discharge path (9a) led out from the intermediate temperature water outlet (7f), the intermediate temperature water extracted from the intermediate temperature water discharge path (9a), and the upper part of the hot water storage tank (7) Medium hot water mixing means (9) for mixing the taken out high temperature water and adjusting it to a temperature that is higher by a predetermined temperature than the hot water supply set temperature;
Hot water mixing means (10, 11) for mixing hot water flowing out from the intermediate temperature water mixing means (9) and low temperature water supplied from a water supply path to adjust to a hot water supply set temperature;
In a hot water storage type heat pump hot water supply apparatus comprising a control means (20) for controlling the circulation of the refrigerant circuit (R) and the hot water supply water heating circuit (K1) and the mixing means (9 to 11),
Inflow position switching means (8) is provided for switching the return position of the hot water boiled by the heat pump heat source machine (1a) between the hot water inflow part (7c) and the intermediate temperature water inflow part (7d) of the hot water storage tank (7). With
The control means (20) discharges hot water from the intermediate temperature water outflow part (7f) while returning the hot water boiled to an intermediate temperature by the heat pump heat source unit (1a) from the intermediate temperature water inflow part (7d) according to the situation. The hot water storage type heat pump hot water supply apparatus characterized by controlling said each apparatus. 前記貯湯タンク（７）における天地方向の位置関係として、前記中温水流入部（７ｄ）は前記中温水流出部（７ｆ）と同じ高さか、もしくは前記中温水流出部（７ｆ）よりも低い位置に配設していることを特徴とする請求項１に記載の貯湯式ヒートポンプ給湯装置。   As a positional relationship in the vertical direction in the hot water storage tank (7), the intermediate warm water inflow portion (7d) is at the same height as the intermediate warm water outflow portion (7f) or lower than the intermediate warm water outflow portion (7f). The hot water storage type heat pump hot water supply apparatus according to claim 1, wherein the hot water storage type heat pump hot water supply apparatus is provided. 前記制御手段（２０）は、前記ヒートポンプ熱源機（１ａ）で沸き上げて前記中温水流入部（７ｄ）から戻す温水の流量を、前記中温水流出部（７ｆ）から出湯する流量と同等か、もしくは前記中温水流出部（７ｆ）から出湯する流量よりも少なくすることを特徴とする請求項１に記載の貯湯式ヒートポンプ給湯装置。   The control means (20) is equal to the flow rate of hot water boiled up by the heat pump heat source unit (1a) and returned from the intermediate warm water inflow portion (7d) to the flow rate of hot water discharged from the intermediate temperature water outflow portion (7f), Alternatively, the hot water storage type heat pump hot water supply apparatus according to claim 1, wherein the hot water supply type heat pump water heater is less than a flow rate of hot water discharged from the intermediate temperature water outflow portion (7 f). 前記貯湯タンク（７）において、前記中温水流入部（７ｄ）と前記中温水流出部（７ｆ）とを１箇所にまとめて設けたことを特徴とする請求項１に記載の貯湯式ヒートポンプ給湯装置。   The hot water storage type heat pump hot water supply device according to claim 1, wherein the hot water storage tank (7) is provided with the intermediate temperature water inflow portion (7d) and the intermediate temperature water outflow portion (7f) in one place. . 前記貯湯タンク（７）内に温水を流入させるための温水流入部材（１２）と前記貯湯タンク（７）内から温水を流出させるための温水流出部材（１３）とを一体にして温水流入出部材（１４）として前記貯湯タンク（７）の壁面に設けるとともに、
前記温水流入部材（１２）からの温水は前記温水流入出部材（１４）の天地方向中央より下側で水平方向、もしくはそれよりも下側へ向けて吐出され、前記温水流出部材（１３）への温水は前記温水流入出部材（１４）の天地方向中央より上側で水平方向、もしくはそれよりも上側から吸入されることを特徴とする請求項４に記載の貯湯式ヒートポンプ給湯装置。 A hot water inflow / outflow member (12) for allowing warm water to flow into the hot water storage tank (7) and a hot water outflow member (13) for allowing hot water to flow out of the hot water storage tank (7) are integrated. (14) as provided on the wall surface of the hot water storage tank (7),
Hot water from the hot water inflow member (12) is discharged from the center in the vertical direction of the hot water inflow / outflow member (14) to the horizontal direction or to the lower side to the hot water outflow member (13). The hot water storage-type heat pump hot water supply apparatus according to claim 4, wherein the hot water is sucked in from the horizontal direction above the center of the hot water inflow / outflow member (14) in the horizontal direction or from the upper side.
JP2004254870A 2004-09-01 2004-09-01 Hot water storage type heat pump water heater Expired - Fee Related JP4134969B2 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008096050A (en) * 2006-10-13 2008-04-24 Matsushita Electric Works Ltd Hot water supply system
KR100847619B1 (en) 2006-03-29 2008-07-21 히타치 어플라이언스 가부시키가이샤 Heat pump water heater
JP2009174781A (en) * 2008-01-24 2009-08-06 Panasonic Electric Works Co Ltd Hot water storage type hot water supply system
JP2009281712A (en) * 2008-05-20 2009-12-03 Harumi Iwata Underground water heat source heat pump water heater
JP2014020666A (en) * 2012-07-18 2014-02-03 Daikin Ind Ltd Hot water supply device, and hot water supply system
JP2014020662A (en) * 2012-07-18 2014-02-03 Daikin Ind Ltd Hot water supply device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100847619B1 (en) 2006-03-29 2008-07-21 히타치 어플라이언스 가부시키가이샤 Heat pump water heater
JP2008096050A (en) * 2006-10-13 2008-04-24 Matsushita Electric Works Ltd Hot water supply system
JP2009174781A (en) * 2008-01-24 2009-08-06 Panasonic Electric Works Co Ltd Hot water storage type hot water supply system
JP2009281712A (en) * 2008-05-20 2009-12-03 Harumi Iwata Underground water heat source heat pump water heater
JP2014020666A (en) * 2012-07-18 2014-02-03 Daikin Ind Ltd Hot water supply device, and hot water supply system
JP2014020662A (en) * 2012-07-18 2014-02-03 Daikin Ind Ltd Hot water supply device

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