JP2009250580A - Heat pump device - Google Patents

Heat pump device Download PDF

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JP2009250580A
JP2009250580A JP2008102349A JP2008102349A JP2009250580A JP 2009250580 A JP2009250580 A JP 2009250580A JP 2008102349 A JP2008102349 A JP 2008102349A JP 2008102349 A JP2008102349 A JP 2008102349A JP 2009250580 A JP2009250580 A JP 2009250580A
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heat exchanger
hot water
refrigerant
refrigerant flow
layer
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Masami Negishi
正美 根岸
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Sanden Corp
サンデン株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump device capable of improving a COP easily. <P>SOLUTION: An expansion means (7) of the heat pump device (1) comprises a parallel path (11). In the parallel path (11), an expansion device (9) capable of recovering power and an expansion valve (10) for decompressing a refrigerant by expansion are arranged in parallel, the refrigerant is made to flow in the expansion device (9) when switching to a refrigerant flow for using an outdoor heat exchanger (6) as a radiator is performed by a refrigerant flow switching means (5), and the refrigerant is made to flow in the expansion valve (10) when switching to a refrigerant flow for using the outdoor heat exchanger (6) as an evaporator is performed by the refrigerant flow switching means (5). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、ヒートポンプ装置に係り、詳しくは、冷暖房空調機や給湯機に組み込まれて好適なヒートポンプ装置に関する。   The present invention relates to a heat pump device, and more particularly, to a heat pump device suitable for being incorporated in a cooling / heating air conditioner or a water heater.
この種のヒートポンプ装置として、例えば特許文献1には、二酸化炭素冷媒が圧縮機、室外熱交換器、膨張機、室内熱交換器を流れる冷媒回路を備え、この冷媒回路の圧縮機の吐出側に四方弁を設けて冷媒回路における冷媒の流れ方向を切り換えることにより、室内熱交換器を蒸発器として利用して冷房し、または室内熱交換器を放熱器として利用して暖房することができる冷凍サイクル装置が開示されている。   As this type of heat pump device, for example, Patent Document 1 includes a refrigerant circuit in which carbon dioxide refrigerant flows through a compressor, an outdoor heat exchanger, an expander, and an indoor heat exchanger. A refrigeration cycle that can cool the indoor heat exchanger as an evaporator or heat the indoor heat exchanger as a radiator by providing a four-way valve and switching the flow direction of the refrigerant in the refrigerant circuit An apparatus is disclosed.
また、例えば特許文献2には、貯湯タンクを有する給湯回路を備え、圧縮機から吐出された冷媒の一部を貯湯タンク内の水または湯と熱交換させる給湯熱交換器を上記冷媒回路に設けたヒートポンプ式冷暖房給湯装置が開示されている。
特開2004−138332号公報 特開2004−218944号公報
Further, for example, Patent Document 2 includes a hot water supply circuit having a hot water storage tank, and a hot water supply heat exchanger for exchanging a part of the refrigerant discharged from the compressor with water or hot water in the hot water storage tank is provided in the refrigerant circuit. In addition, a heat pump type air conditioning and hot water supply apparatus is disclosed.
JP 2004-138332 A JP 2004-218944 A
ところで、このようなヒートポンプ装置にて給湯運転を行う場合には、給湯回路にて冷水を加熱するため、室外熱交換器の冷媒出口温度が例えば通年平均で20℃前後とすると、二酸化炭素冷媒の特性により膨張機において回収できる動力が比較的小さくなり、一方、夏季に外気温度が高温となって冷房運転を行う場合には、室外熱交換器の冷媒出口温度は例えば外気温度35℃のとき40℃程度になり、膨張機において回収できる動力が比較的大きくなることが知られている。   By the way, when performing a hot water supply operation with such a heat pump device, since the cold water is heated in the hot water supply circuit, assuming that the refrigerant outlet temperature of the outdoor heat exchanger is, for example, around 20 ° C. on average throughout the year, The power that can be recovered in the expander is relatively small due to the characteristics. On the other hand, when the outdoor temperature is high and the cooling operation is performed in summer, the refrigerant outlet temperature of the outdoor heat exchanger is, for example, 40 It is known that the power that can be recovered in the expander becomes relatively large because the temperature becomes about 0C.
すなわち、冷房運転を行う場合にのみ膨張機を使用することにより、空調給湯装置全体として成績係数(COP)を向上することができる。
しかしながら、特許文献1では、膨張機と膨張弁とを直列に配置し、暖房運転時には膨張機を経由して動力回収した後の冷媒を膨張弁により減圧させて室外熱交換器に導いて蒸発させるようにし、冷房運転時にはこれらをすべてバイパスするため、冷房運転時において膨張機を使用できない。
That is, by using the expander only when performing the cooling operation, the coefficient of performance (COP) can be improved as the entire air conditioning hot water supply apparatus.
However, in Patent Document 1, an expander and an expansion valve are arranged in series. During heating operation, the refrigerant after recovering power via the expander is decompressed by the expansion valve and led to the outdoor heat exchanger to be evaporated. Thus, since all of these are bypassed during the cooling operation, the expander cannot be used during the cooling operation.
一方、特許文献2では、膨張弁しかないため、膨張機における動力回収ができない。従って、上記従来技術では、上述したような冷房運転時にのみ膨張機を使用する点につき格別な配慮がなされておらず、空調給湯装置のCOP向上には依然として課題が残されている。
本発明は、このような課題に鑑みてなされたもので、簡易にしてCOPを向上することができるヒートポンプ装置を提供することを目的とする。
On the other hand, in patent document 2, since there is only an expansion valve, the power recovery in an expander cannot be performed. Therefore, in the prior art, no special consideration is given to the use of the expander only during the cooling operation as described above, and there remains a problem in improving the COP of the air conditioning and hot water supply apparatus.
This invention is made | formed in view of such a subject, and it aims at providing the heat pump apparatus which can improve COP simply.
上記の目的を達成するべく、請求項1記載のヒートポンプ装置は、冷媒の循環路に、圧縮機、冷媒流れ切換手段、室外熱交換器、膨張手段、第1熱交換器が順次介挿されたヒートポンプ回路を備えたヒートポンプ装置であって、膨張手段は、動力回収可能な膨張機と、冷媒を膨張により減圧させる膨張弁とが並列に配置され、冷媒流れ切換手段により室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには膨張機に冷媒が流れ、冷媒流れ切換手段により室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには膨張弁に冷媒が流れる並列経路からなることを特徴としている。   In order to achieve the above object, in the heat pump apparatus according to claim 1, a compressor, a refrigerant flow switching unit, an outdoor heat exchanger, an expansion unit, and a first heat exchanger are sequentially inserted in the refrigerant circulation path. A heat pump device including a heat pump circuit, wherein the expansion means includes an expander capable of recovering power and an expansion valve for decompressing the refrigerant by expansion, and the outdoor heat exchanger is dissipated by the refrigerant flow switching means. When the refrigerant flow used is switched to the refrigerant flow, the refrigerant flows to the expander, and when the refrigerant flow switching means is switched to the refrigerant flow using the outdoor heat exchanger as an evaporator, the refrigerant flow flows to the expansion valve. It is characterized by.
また、請求項2記載の発明では、請求項1において、湯水の循環路に、第1熱交換器、水ポンプ、貯湯タンクが順次介挿された給湯回路を備え、給湯回路は、第1熱交換器と貯湯タンクとの間に、貯湯タンクの下層部から第1熱交換器に流入された湯水を貯湯タンクの下層部より上側の貯湯タンクの中層部と中層部より上側の貯湯タンクの上層部とに切り換えて流入させる湯水切換手段を有し、湯水切換手段は、冷媒流れ切換手段により室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには第1熱交換器に流入された湯水を中層部に流入させ、冷媒流れ切換手段により室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには第1熱交換器に流入された湯水を高層部に流入させることを特徴としている。   The invention according to claim 2 is characterized in that in claim 1, a hot water supply circuit in which a first heat exchanger, a water pump, and a hot water storage tank are sequentially inserted in the hot water circulation path is provided. The hot water flowing into the first heat exchanger from the lower part of the hot water tank between the exchanger and the hot water tank is the middle layer of the hot water tank above the lower layer part of the hot water tank and the upper layer of the hot water tank above the middle layer. Hot water switching means for switching in and flowing into the hot water switching means, and the hot water switching means was introduced into the first heat exchanger when the refrigerant flow switching means was switched to the refrigerant flow using the outdoor heat exchanger as a radiator. Hot water is allowed to flow into the middle layer, and when the refrigerant flow switching means switches to a refrigerant flow that uses the outdoor heat exchanger as an evaporator, the hot water that has flowed into the first heat exchanger flows into the higher layer. Yes.
更に、請求項3記載の発明では、請求項2において、液媒の循環路に、湯水熱交換手段、液媒ポンプ、室内熱交換器が順次介挿された空調回路を備え、湯水熱交換手段は、下層部に配置された低温水熱交換器と、上層部に配置された高温湯熱交換器とが並列に配置され、冷媒流れ切換手段により室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには低温水熱交換器の液媒を室内熱交換器に流入させて室内熱交換器を吸熱器として使用し、冷媒流れ切換手段により室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには高温湯熱交換器の液媒を室内熱交換器に流入させて室内熱交換器を放熱器として使用する第2並列経路からなることを特徴としている。   Furthermore, in the invention of claim 3, in claim 2, an air conditioning circuit in which the hot water heat exchange means, the liquid medium pump, and the indoor heat exchanger are sequentially inserted in the circulation path of the liquid medium is provided, and the hot water heat exchange means Is a refrigerant flow in which a low-temperature water heat exchanger arranged in the lower layer part and a high-temperature hot water heat exchanger arranged in the upper layer part are arranged in parallel, and the outdoor heat exchanger is used as a radiator by the refrigerant flow switching means. The refrigerant flow in which the liquid medium of the low-temperature water heat exchanger flows into the indoor heat exchanger and the indoor heat exchanger is used as the heat absorber, and the outdoor heat exchanger is used as the evaporator by the refrigerant flow switching means. When switched to, the liquid medium of the high-temperature hot water heat exchanger flows into the indoor heat exchanger and the second parallel path is used which uses the indoor heat exchanger as a radiator.
従って、請求項1記載の本発明のヒートポンプ装置によれば、ヒートポンプ回路の膨張手段が冷媒流れ切換手段により室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには膨張機に冷媒が流れ、冷媒流れ切換手段により室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには膨張弁に冷媒が流れる並列経路からなる。これにより、室外熱交換器を放熱器として使用する場合に、すなわち、室外熱交換器の冷媒出口温度が高温となり膨張機において回収できる動力が比較的大きくなる場合に、膨張機に冷媒を流して動力回収することができるため、並列経路を形成するだけの簡易な構成で、ヒートポンプ装置のCOPを効果的に向上することができる。   Therefore, according to the heat pump device of the present invention, the refrigerant flows through the expander when the expansion means of the heat pump circuit is switched to the refrigerant flow using the outdoor heat exchanger as a radiator by the refrigerant flow switching means. When the refrigerant flow switching means switches to the refrigerant flow that uses the outdoor heat exchanger as an evaporator, the refrigerant flow switching means includes a parallel path through which the refrigerant flows through the expansion valve. Thus, when the outdoor heat exchanger is used as a radiator, that is, when the refrigerant outlet temperature of the outdoor heat exchanger becomes high and the power that can be recovered in the expander becomes relatively large, the refrigerant is allowed to flow through the expander. Since power can be recovered, the COP of the heat pump apparatus can be effectively improved with a simple configuration that only forms a parallel path.
また、請求項2記載の発明によれば、給湯回路の湯水切換手段は、冷媒流れ切換手段により室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには第1熱交換器に流入された湯水を中層部に流入させ、冷媒流れ切換手段により室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには第1熱交換器に流入された湯水を高層部に流入させる。これにより、貯湯タンクの異なる温度の湯水が貯留される中層部と上層部とを利用して冷媒を効率的に蒸発、または放熱させることができるため、ヒートポンプ装置のCOPを更に向上することができる。   According to the second aspect of the present invention, the hot / cold water switching means of the hot water supply circuit flows into the first heat exchanger when the refrigerant flow switching means is switched to the refrigerant flow using the outdoor heat exchanger as a radiator. The hot and cold water that has flowed into the first heat exchanger is caused to flow into the upper layer when the hot water is introduced into the middle layer and the refrigerant flow switching means switches to the refrigerant flow that uses the outdoor heat exchanger as an evaporator. Thereby, since the refrigerant can be efficiently evaporated or radiated using the middle layer portion and the upper layer portion in which hot water of different temperatures are stored in the hot water storage tank, the COP of the heat pump device can be further improved. .
更に、請求項3記載の発明によれば、湯水熱交換手段は、下層部に配置された低温水熱交換器と、上層部に配置された高温湯熱交換器とが並列に配置され、冷媒流れ切換手段により室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには低温水熱交換器の液媒を室内熱交換器に流入させて室内熱交換器を吸熱器として使用し、冷媒流れ切換手段により室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには高温湯熱交換器の液媒を室内熱交換器に流入させて室内熱交換器を放熱器として使用する第2並列経路からなる。これにより、外気温度を利用して貯湯タンクの湯水の高層部と中層部とを効率的に形成し、ひいては冷媒を効率的に蒸発、または放熱させることができるため、ヒートポンプ装置のCOPをより一層向上することができる。   Further, according to the invention described in claim 3, the hot / cold water heat exchange means includes a low temperature water heat exchanger disposed in the lower layer part and a high temperature hot water heat exchanger disposed in the upper layer part arranged in parallel, When the flow switching means switches to the refrigerant flow that uses the outdoor heat exchanger as a radiator, the liquid medium of the low-temperature water heat exchanger is caused to flow into the indoor heat exchanger and the indoor heat exchanger is used as the heat absorber. When the flow switching means switches to the refrigerant flow that uses the outdoor heat exchanger as an evaporator, the second medium uses the indoor heat exchanger as a radiator by allowing the liquid medium of the hot water heat exchanger to flow into the indoor heat exchanger. Consists of parallel paths. Accordingly, the high temperature layer and the middle layer of the hot water storage tank can be efficiently formed using the outside air temperature, and the refrigerant can be efficiently evaporated or radiated, so that the COP of the heat pump device can be further increased. Can be improved.
以下、図面により本発明の一実施形態について説明する。
図1はヒートポンプ装置の一例として空調給湯装置1を概略的に示しており、この装置1は大きく分けてヒートポンプ回路2、給湯回路20、空調回路30から構成されている。
ヒートポンプ回路2は、二酸化炭素冷媒の循環路3を備え、循環路3には圧縮機4、四方弁(冷媒流れ切換手段)5、室外熱交換器6、膨張手段7、給湯熱交換器(第1熱交換器)8が順次介挿されている。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 schematically shows an air conditioning and hot water supply apparatus 1 as an example of a heat pump apparatus. The apparatus 1 is roughly composed of a heat pump circuit 2, a hot water supply circuit 20, and an air conditioning circuit 30.
The heat pump circuit 2 includes a carbon dioxide refrigerant circulation path 3, and the circulation path 3 includes a compressor 4, a four-way valve (refrigerant flow switching means) 5, an outdoor heat exchanger 6, an expansion means 7, and a hot water supply heat exchanger (first). 1 heat exchanger) 8 are sequentially inserted.
膨張手段7は、図示しない発電機等が接続されて動力回収を可能とする膨張機9と、冷媒を膨張により減圧させる膨張弁10とが並列に配置された並列経路11から構成されている。
並列経路11には、冷媒の流れ方向からみてそれぞれ膨張機9、膨張弁10の下流側にそれぞれ逆止弁12,13が介挿され、冷媒の流れ方向が切り換えられても膨張機9、膨張弁10に冷媒が逆流しないように構成されている。
The expansion means 7 is composed of a parallel path 11 in which an expander 9 that is connected to a generator (not shown) to enable power recovery and an expansion valve 10 that decompresses the refrigerant by expansion is arranged in parallel.
In the parallel path 11, check valves 12 and 13 are respectively inserted downstream of the expander 9 and the expansion valve 10 when viewed from the refrigerant flow direction. The valve 10 is configured so that the refrigerant does not flow backward.
一方、給湯回路20は、湯水の循環路21を備え、循環路21には給湯熱交換器8、水ポンプ22、貯湯タンク23が順次介挿されている。
給湯回路20は、湯水の流れ方向からみて水ポンプ22から貯湯タンク23にかけての循環路21が分岐されて分岐経路24,25を形成している。各分岐経路24,25にはそれぞれ電磁弁26,27が介挿され、電磁弁26,27を開閉することにより、貯湯タンク23の下層部23aから流出されて給湯熱交換器8、水ポンプ22を経由して貯湯タンク23に戻る湯水を下層部23aより上側の中層部23bと中層部23bより上側の上層部23cとに切り換えて流入可能に構成されている(湯水切換手段)。
On the other hand, the hot water supply circuit 20 includes a hot water circulation path 21 in which a hot water supply heat exchanger 8, a water pump 22, and a hot water storage tank 23 are sequentially inserted.
In the hot water supply circuit 20, the circulation path 21 from the water pump 22 to the hot water storage tank 23 is branched from the hot water flow direction to form branch paths 24 and 25. Solenoid valves 26 and 27 are inserted in the branch paths 24 and 25, respectively. By opening and closing the electromagnetic valves 26 and 27, the branch valves 24 and 25 are discharged from the lower layer portion 23a of the hot water storage tank 23 to be supplied to the hot water supply heat exchanger 8 and the water pump 22. The hot water returning to the hot water storage tank 23 via the hot water is switched to the middle layer portion 23b above the lower layer portion 23a and the upper layer portion 23c above the middle layer portion 23b so that it can flow in (hot water switching means).
例えば、下層部23aは約10℃以下の温度分布をなしており、ここに例えば夏季に24℃程度にもなる市水等が供給されることにより下層部23aの上側に約24℃の温度分布をなす中層部23bを形成し、更に高層部23cは約65℃の温度分布をなして風呂等のための湯水が取水される。
ここで、下層部23aは貯湯タンク23に貯湯される湯水の量が減少しない程度に所定の高さに設定され、給湯が行われると中層部23bが高層部23c側に拡大する。また、貯湯タンク23から給湯熱交換器8に延びる循環路21は少なくとも後述する低温水熱交換器35の上側に設けられ、分岐経路25は低温水熱交換器35の近傍に設けられる。
For example, the lower layer portion 23a has a temperature distribution of about 10 ° C. or less, and is supplied with city water or the like that reaches about 24 ° C. in summer, for example, and has a temperature distribution of about 24 ° C. above the lower layer portion 23a. The middle layer portion 23b is formed, and the higher layer portion 23c has a temperature distribution of about 65 ° C., and hot water for a bath or the like is taken in.
Here, the lower layer part 23a is set to a predetermined height such that the amount of hot water stored in the hot water storage tank 23 does not decrease, and when hot water is supplied, the middle layer part 23b expands toward the higher layer part 23c. The circulation path 21 extending from the hot water storage tank 23 to the hot water supply heat exchanger 8 is provided at least on the upper side of a low-temperature water heat exchanger 35 described later, and the branch path 25 is provided in the vicinity of the low-temperature water heat exchanger 35.
一方、空調回路30は、ブラインや水等からなる液媒の循環路31(図1に一点鎖線で示す)を備え、循環路31には湯水熱交換手段32、液媒ポンプ33、複数の室内熱交換器34が介挿されている。
湯水熱交換手段32は、下層部23aに配置された低温水熱交換器35と、高層部23cに配置された高温湯熱交換器36とが並列に配置された並列経路(第2並列経路)37から構成されている。
On the other hand, the air conditioning circuit 30 includes a circulation path 31 (shown by a one-dot chain line in FIG. 1) of a liquid medium made of brine, water, or the like, and the circulation path 31 includes a hot and cold heat exchange means 32, a liquid medium pump 33, and a plurality of indoors. A heat exchanger 34 is inserted.
The hot water heat exchange means 32 is a parallel path (second parallel path) in which a low temperature water heat exchanger 35 disposed in the lower layer portion 23a and a high temperature hot water heat exchanger 36 disposed in the higher layer portion 23c are disposed in parallel. 37.
並列経路37には、液媒の流れ方向からみてそれぞれ低温水熱交換器35、高温湯熱交換器36の下流側にそれぞれ電磁弁38,39が介挿され、電磁弁38,39を開閉することにより、それぞれ低温水熱交換器35と高温湯熱交換器36とから室内熱交換器34に液媒を切り換えて流入可能に構成されている。
また、各室内熱交換器34は並列に配置され、液媒ポンプ33と各室内熱交換器34との間には温度式制水弁40がそれぞれ介挿され、温度式制水弁40は、温度式制水弁40に流入する液媒の温度が所定温度以下に低下したときには閉弁されるように構成されている。
Electromagnetic valves 38 and 39 are inserted in the parallel path 37 on the downstream side of the low temperature water heat exchanger 35 and the high temperature hot water heat exchanger 36, respectively, as viewed from the flow direction of the liquid medium, and open and close the electromagnetic valves 38 and 39. Thus, the liquid medium can be switched from the low-temperature water heat exchanger 35 and the high-temperature hot water heat exchanger 36 to the indoor heat exchanger 34 so as to be able to flow in.
Moreover, each indoor heat exchanger 34 is arrange | positioned in parallel, and the temperature type water control valve 40 is inserted between the fluid pump 33 and each indoor heat exchanger 34, respectively. When the temperature of the liquid medium flowing into the temperature type water control valve 40 falls below a predetermined temperature, the valve is closed.
以下、このように構成された装置1の運転について説明する。
先ず、空調回路30にて冷房運転が行われるとき、ヒートポンプ回路2では、四方弁5により室外熱交換器6を放熱器として使用する冷媒流れ(図1の矢印方向)に切り換えられ、このときには膨張機9に冷媒が流れて動力回収が行われる。
また、給湯回路20では、電磁弁26が閉弁されるとともに電磁弁27が開弁され、下層部23aから給湯熱交換器8に流入された湯水を中層部23bに流入させて給湯熱交換器8を蒸発器、換言すると吸熱器として使用する。
Hereinafter, the operation of the apparatus 1 configured as described above will be described.
First, when a cooling operation is performed in the air conditioning circuit 30, the heat pump circuit 2 is switched by the four-way valve 5 to a refrigerant flow (in the arrow direction in FIG. 1) using the outdoor heat exchanger 6 as a radiator. The refrigerant flows into the machine 9 and power recovery is performed.
Further, in the hot water supply circuit 20, the electromagnetic valve 26 is closed and the electromagnetic valve 27 is opened, and hot water that has flowed into the hot water supply heat exchanger 8 from the lower layer portion 23a is caused to flow into the middle layer portion 23b to supply the hot water supply heat exchanger. 8 is used as an evaporator, in other words as a heat absorber.
更に、空調回路30では、電磁弁38が開弁され、電磁弁39が閉弁されるとともに、例えば温度式制水弁40の一つが開弁され、低温水熱交換器35に流入された液媒を室内熱交換器34の一つに流入させてこの室内熱交換器34を吸熱器として使用する。
一方、図2に示されるように、空調回路30にて暖房運転が行われるとき、四方弁5により室外熱交換器6を蒸発器、換言すると吸熱器として使用する冷媒流れ(図2の矢印方向)に切り換えられ、このときには膨張弁10に冷媒が流れる。
Further, in the air conditioning circuit 30, the electromagnetic valve 38 is opened, the electromagnetic valve 39 is closed, and, for example, one of the temperature type water control valves 40 is opened, and the liquid flowing into the low temperature water heat exchanger 35 is opened. The medium is caused to flow into one of the indoor heat exchangers 34, and this indoor heat exchanger 34 is used as a heat absorber.
On the other hand, as shown in FIG. 2, when heating operation is performed in the air conditioning circuit 30, the four-way valve 5 uses the outdoor heat exchanger 6 as an evaporator, in other words, a refrigerant flow (in the direction of the arrow in FIG. 2). At this time, the refrigerant flows into the expansion valve 10.
また、給湯回路20では、電磁弁26が開弁されるとともに電磁弁27が閉弁され、下層部23aから給湯熱交換器8に流入された湯水を高層部23cに流入させて給湯熱交換器8を放熱器として使用する。
更に、空調回路30では、電磁弁38が閉弁され、電磁弁39が開弁されるとともに、温度式制水弁40の一つが開弁され、高温湯熱交換器36の液媒を室内熱交換器34の一つに流入させてこの室内熱交換器34を放熱器として使用する。
Further, in the hot water supply circuit 20, the electromagnetic valve 26 is opened and the electromagnetic valve 27 is closed, and hot water that has flowed into the hot water supply heat exchanger 8 from the lower layer 23a is caused to flow into the higher layer 23c to supply the hot water supply heat exchanger. 8 is used as a radiator.
Further, in the air conditioning circuit 30, the electromagnetic valve 38 is closed, the electromagnetic valve 39 is opened, and one of the temperature type water control valves 40 is opened, and the liquid medium of the high-temperature hot water heat exchanger 36 is used as the indoor heat. The indoor heat exchanger 34 is used as a radiator by flowing into one of the exchangers 34.
以上のように、本実施形態では、ヒートポンプ回路2の膨張手段7が動力回収を可能とする膨張機9と冷媒を膨張により減圧させるだけの膨張弁10とが並列に配置された並列経路11から構成され、冷房運転が行われるとき、ヒートポンプ回路2では、四方弁5により室外熱交換器6を放熱器として使用する冷媒流れに切り換えられ、このときには膨張機9に冷媒が流れて動力回収が行われる。これにより、冷房運転が行われ室外熱交換器6を放熱器として使用する場合にのみ、すなわち、室外熱交換器6の冷媒出口温度が高温となり膨張機9において回収できる動力が比較的大きくなる場合に、膨張機9に冷媒を流して動力回収することができるため、並列経路11を形成するだけの簡易な構成で、装置1のCOPを効果的に向上することができる。   As described above, in this embodiment, from the parallel path 11 in which the expander 9 that allows the expansion means 7 of the heat pump circuit 2 to recover power and the expansion valve 10 that only decompresses the refrigerant by expansion are arranged in parallel. When the cooling operation is performed, the heat pump circuit 2 is switched to the refrigerant flow that uses the outdoor heat exchanger 6 as a radiator by the four-way valve 5, and at this time, the refrigerant flows into the expander 9 to recover the power. Is called. Thereby, only when the cooling operation is performed and the outdoor heat exchanger 6 is used as a radiator, that is, when the refrigerant outlet temperature of the outdoor heat exchanger 6 becomes high and the power that can be recovered in the expander 9 becomes relatively large. In addition, since the power can be recovered by flowing a refrigerant through the expander 9, the COP of the apparatus 1 can be effectively improved with a simple configuration in which the parallel path 11 is formed.
また、このとき、給湯回路20では給湯熱交換器8に流入された湯水を中層部23bに流入させ、空調回路30では低温水熱交換器35の液媒を室内熱交換器34に流入させて室内熱交換器34を吸熱器として使用することにより、貯湯タンク23の湯水の高層部23cと中層部23bとを利用し、更に、外気温度を利用して高層部23cと中層部23bとを効率的に形成し、ひいては冷媒を効率的に蒸発、または放熱させることができるため、装置1のCOPをより一層向上することができる。   At this time, the hot water supply circuit 20 causes hot water flowing into the hot water supply heat exchanger 8 to flow into the middle layer portion 23b, and the air conditioning circuit 30 causes the liquid medium of the low-temperature water heat exchanger 35 to flow into the indoor heat exchanger 34. By using the indoor heat exchanger 34 as a heat absorber, the hot water in the hot water storage tank 23 is used for the high layer portion 23c and the middle layer portion 23b, and the outside air temperature is used to efficiently make the high layer portion 23c and the middle layer portion 23b efficient. Thus, the COP of the apparatus 1 can be further improved since the refrigerant can be efficiently evaporated or dissipated to dissipate heat.
しかも、各室内熱交換器34の手前にそれぞれ温度式制水弁40が介挿されることにより、図1に示されるように、複数の室内熱交換器34を同一の空調回路30に接続し、個別の液媒温度設定で運転することができて好適である。
また、ヒートポンプ回路2と空調回路30との間に給湯回路20を位置づけることにより、ヒートポンプ回路2の高温、高圧となる冷媒配管を引き回すのを極力防止することもできるため、装置1の安全性を向上することができて好ましい。
Moreover, the temperature type water control valve 40 is inserted in front of each indoor heat exchanger 34 to connect a plurality of indoor heat exchangers 34 to the same air conditioning circuit 30 as shown in FIG. It is preferable that it can be operated at an individual liquid medium temperature setting.
In addition, by positioning the hot water supply circuit 20 between the heat pump circuit 2 and the air conditioning circuit 30, it is possible to prevent the refrigerant piping that is high temperature and high pressure of the heat pump circuit 2 from being routed as much as possible. It can improve and is preferable.
以上で本発明の一実施形態についての説明を終えるが、本発明は上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々の変更ができるものである。   The description of one embodiment of the present invention is finished above, but the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
本発明の一実施形態に係る空調給湯装置にて冷房運転を行う状態を概略的に示した模式図である。It is the schematic diagram which showed schematically the state which performs air_conditionaing | cooling operation with the air-conditioning hot-water supply apparatus which concerns on one Embodiment of this invention. 図1の空調給湯装置にて暖房運転を行う状態を概略的に示した模式図である。It is the schematic diagram which showed schematically the state which performs heating operation with the air-conditioning hot-water supply apparatus of FIG.
符号の説明Explanation of symbols
1 空調給湯装置(ヒートポンプ装置)
2 ヒートポンプ回路
3 冷媒の循環路
4 圧縮機
5 四方弁(冷媒流れ切換手段)
6 室外熱交換器
7 膨張手段
8 給湯熱交換器(第1熱交換器)
9 膨張機
10 膨張弁
11 並列経路
20 給湯回路
21 湯水の循環路
22 水ポンプ
23 貯湯タンク
23a 下層部
23b 中層部
23c 高層部
30 空調回路
31 液媒の循環路
32 湯水熱交換手段
33 液媒ポンプ
34 室内熱交換器
35 低温水熱交換器
36 高温湯熱交換器
37 並列経路(第2並列経路)
1 Air-conditioning hot water supply equipment (heat pump equipment)
2 Heat pump circuit 3 Refrigerant circulation path 4 Compressor 5 Four-way valve (refrigerant flow switching means)
6 Outdoor heat exchanger 7 Expansion means 8 Hot water supply heat exchanger (first heat exchanger)
DESCRIPTION OF SYMBOLS 9 Expander 10 Expansion valve 11 Parallel path 20 Hot water supply circuit 21 Hot water circulation path 22 Water pump 23 Hot water storage tank 23a Lower layer part 23b Middle layer part 23c Higher layer part 30 Air conditioning circuit 31 Fluid medium circulation path 32 Hot water heat exchange means 33 Liquid medium pump 34 Indoor heat exchanger 35 Low temperature water heat exchanger 36 High temperature hot water heat exchanger 37 Parallel path (second parallel path)

Claims (3)

  1. 冷媒の循環路に、圧縮機、冷媒流れ切換手段、室外熱交換器、膨張手段、第1熱交換器が順次介挿されたヒートポンプ回路を備えたヒートポンプ装置であって、
    前記膨張手段は、動力回収可能な膨張機と、冷媒を膨張により減圧させる膨張弁とが並列に配置され、前記冷媒流れ切換手段により前記室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには前記膨張機に冷媒が流れ、前記冷媒流れ切換手段により前記室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには前記膨張弁に冷媒が流れる並列経路からなることを特徴とするヒートポンプ装置。
    A heat pump device comprising a heat pump circuit in which a compressor, a refrigerant flow switching means, an outdoor heat exchanger, an expansion means, and a first heat exchanger are sequentially inserted in a refrigerant circulation path,
    In the expansion means, an expander capable of recovering power and an expansion valve for decompressing the refrigerant by expansion are arranged in parallel, and the refrigerant flow switching means is switched to a refrigerant flow that uses the outdoor heat exchanger as a radiator. The refrigerant flows into the expander, and the refrigerant flow switching means comprises a parallel path through which the refrigerant flows to the expansion valve when the refrigerant flow is switched to the refrigerant flow using the outdoor heat exchanger as an evaporator. Heat pump device.
  2. 湯水の循環路に、前記第1熱交換器、水ポンプ、貯湯タンクが順次介挿された給湯回路を備え、
    前記給湯回路は、前記第1熱交換器と前記貯湯タンクとの間に、前記貯湯タンクの下層部から前記第1熱交換器に流入された湯水を該下層部より上側の前記貯湯タンクの中層部と該中層部より上側の前記貯湯タンクの上層部とに切り換えて流入させる湯水切換手段を有し、
    前記湯水切換手段は、前記冷媒流れ切換手段により前記室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには前記第1熱交換器に流入された湯水を前記中層部に流入させ、前記冷媒流れ切換手段により前記室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには前記第1熱交換器に流入された湯水を前記高層部に流入させることを特徴とする請求項1に記載のヒートポンプ装置。
    The hot water circulation path includes a hot water supply circuit in which the first heat exchanger, the water pump, and the hot water storage tank are sequentially inserted,
    The hot water supply circuit is configured such that hot water flowing into the first heat exchanger from a lower layer portion of the hot water storage tank is disposed between the first heat exchanger and the hot water storage tank. Hot water switching means for switching and flowing into the upper layer portion of the hot water storage tank above the middle layer portion and the middle layer portion,
    The hot / cold water switching means causes the hot water flowing into the first heat exchanger to flow into the middle layer when the refrigerant flow switching means is switched to a refrigerant flow that uses the outdoor heat exchanger as a radiator, 2. The hot water flowing into the first heat exchanger is caused to flow into the high layer portion when the refrigerant flow switching means switches to a refrigerant flow that uses the outdoor heat exchanger as an evaporator. The heat pump apparatus as described.
  3. 液媒の循環路に、湯水熱交換手段、液媒ポンプ、室内熱交換器が順次介挿された空調回路を備え、
    前記湯水熱交換手段は、前記下層部に配置された低温水熱交換器と、前記上層部に配置された高温湯熱交換器とが並列に配置され、前記冷媒流れ切換手段により前記室外熱交換器を放熱器として使用する冷媒流れに切り換えられたときには前記低温水熱交換器の液媒を前記室内熱交換器に流入させて前記室内熱交換器を吸熱器として使用し、前記冷媒流れ切換手段により前記室外熱交換器を蒸発器として使用する冷媒流れに切り換えられたときには前記高温湯熱交換器の液媒を前記室内熱交換器に流入させて前記室内熱交換器を放熱器として使用する第2並列経路からなることを特徴とする請求項2に記載のヒートポンプ装置。
    The circulation path of the liquid medium is equipped with an air conditioning circuit in which hot and cold heat exchange means, a liquid medium pump, and an indoor heat exchanger are sequentially inserted,
    The hot water heat exchange means includes a low temperature water heat exchanger arranged in the lower layer part and a high temperature hot water heat exchanger arranged in the upper layer part arranged in parallel, and the outdoor heat exchange by the refrigerant flow switching means. When the refrigerant is switched to the refrigerant flow to be used as a radiator, the liquid medium of the low-temperature water heat exchanger is caused to flow into the indoor heat exchanger and the indoor heat exchanger is used as a heat absorber, and the refrigerant flow switching means When the refrigerant flow is switched to use the outdoor heat exchanger as an evaporator, the liquid medium of the high temperature hot water heat exchanger flows into the indoor heat exchanger and the indoor heat exchanger is used as a radiator. The heat pump device according to claim 2, comprising two parallel paths.
JP2008102349A 2008-04-10 2008-04-10 Heat pump device Pending JP2009250580A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103196186A (en) * 2013-03-13 2013-07-10 广西比迪光电科技工程有限责任公司 Central air conditioning system with water storage tank
CN103574797A (en) * 2012-07-25 2014-02-12 中国二十冶集团有限公司 Control method of heat recovery composite energy system for hospital buildings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103574797A (en) * 2012-07-25 2014-02-12 中国二十冶集团有限公司 Control method of heat recovery composite energy system for hospital buildings
CN103196186A (en) * 2013-03-13 2013-07-10 广西比迪光电科技工程有限责任公司 Central air conditioning system with water storage tank

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