JP5314487B2

JP5314487B2 - Heat pump air conditioner with hot water supply function

Info

Publication number: JP5314487B2
Application number: JP2009110137A
Authority: JP
Inventors: 良和石木; 正教上倉; 綱之板垣; 久平石羽根; 裕次郎萩原; 潤中里
Original assignee: Hitachi Appliances Inc
Current assignee: Hitachi Appliances Inc
Priority date: 2009-04-28
Filing date: 2009-04-28
Publication date: 2013-10-16
Anticipated expiration: 2029-04-28
Also published as: JP2010255994A

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump type air conditioner with hot-water supply function capable of operating in respective operation modes, which are a cooling-only mode, a cooling and hot-water supply mode, a heating-only mode, a heating and hot-water supply mode, and a hot-water supply only mode, and capable of utilizing almost all the heat exchanging capacity for cooling and hot-water supply when it operates in the cooling-only mode and in the hot-water supply only mode. SOLUTION: A hot-water supply heat exchanger for heat exchanging between refrigerant Rf and supplied hot water W2 is constructed by piping a hot-water supply pipe 11 from a supply plug 20a via a second hot-water supply heat exchanger 7 to a first hot-water supply heat exchanger 3. Further, a water-side heat exchanger 8 for heat exchanging between the refrigerant Rf and cooling/heating water W1 is arranged in parallel with the second hot-water supply heat exchanger 7. The heat pump type air conditioner 1 with the hot-water supply function includes a four-way valve 4 for switching a circulation route of the refrigerant Rf, a first control valve 7a for controlling circulation of the refrigerant Rf of the second hot-water supply heat exchanger 7, and a second control valve 8a for controlling circulation of the refrigerant Rf of the water-side heat exchanger 8. COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、給湯機能付ヒートポンプ式空気調和機に関する。 The present invention relates to a heat pump air conditioner with a hot water supply function.

冷房、暖房、給湯の３つの機能を有する給湯機能付ヒートポンプ式空気調和機は広く知られ、例えば特許文献１には、冷房単独モード、冷房＋給湯モード、暖房単独モード、暖房＋給湯モード、及び給湯単独モードの各動作モードを切り換え可能な、給湯機能付ヒートポンプ式空気調和機（冷暖房給湯装置）が開示されている。 A heat pump type air conditioner with a hot water supply function having three functions of cooling, heating, and hot water supply is widely known. For example, Patent Document 1 discloses a cooling only mode, a cooling + hot water supply mode, a heating only mode, a heating + hot water supply mode, and There is disclosed a heat pump air conditioner (cooling / heating hot water supply apparatus) with a hot water supply function capable of switching each operation mode of a hot water supply single mode.

特開平２−２４７４６３号公報JP-A-2-247463

しかしながら、例えば特許文献１に開示される給湯機能付ヒートポンプ式空気調和機は、冷房と暖房を切り換える冷凍サイクルと、暖房と給湯を切り換える冷凍サイクルの２つの冷凍サイクルが併設された構成であり、この構成によると、例えば給湯機能付ヒートポンプ式空気調和機が冷房単独モードで動作する場合、片方の冷凍サイクル（暖房と給湯を切り換える冷凍サイクル）は停止する。したがって、給湯機能付ヒートポンプ式空気調和機全体の能力の５０％相当の能力しか冷房に利用できないという問題がある。 However, for example, a heat pump air conditioner with a hot water supply function disclosed in Patent Document 1 has a configuration in which two refrigeration cycles, a refrigeration cycle for switching between cooling and heating, and a refrigeration cycle for switching between heating and hot water are provided. According to the configuration, for example, when the heat pump type air conditioner with a hot water supply function operates in the cooling only mode, one refrigeration cycle (a refrigeration cycle for switching between heating and hot water supply) is stopped. Therefore, there is a problem that only 50% of the capacity of the heat pump air conditioner with a hot water supply function can be used for cooling.

同様に、給湯単独モードで動作する場合にも片方の冷凍サイクル（冷房と暖房を切り換える冷凍サイクル）は停止することから、給湯機能付ヒートポンプ式空気調和機全体の能力の５０％相当の能力しか給湯に利用できないという問題がある。
加えて、給湯単独モードで動作する場合には空気側熱交換器が蒸発器となることから、動作条件によっては空気側熱交換器に霜が発生するため除霜する必要があるが、この場合、給湯水を熱源として除霜するため、除霜中は給湯水の温度が低下するという問題もある。 Similarly, when operating in the single hot water supply mode, one of the refrigeration cycles (the refrigeration cycle that switches between cooling and heating) stops, so only 50% of the capacity of the entire heat pump air conditioner with hot water supply function is supplied. There is a problem that it cannot be used.
In addition, when operating in the hot water supply single mode, the air side heat exchanger becomes an evaporator, so frost may be generated in the air side heat exchanger depending on the operating conditions. Further, since defrosting is performed using hot water as a heat source, there is also a problem that the temperature of the hot water decreases during defrosting.

さらに、例えば特許文献１に開示される給湯機能付ヒートポンプ式空気調和機が冷房＋給湯モードで動作する場合には、冷房用の冷凍サイクルと給湯用の冷凍サイクルとが異なることから、それぞれの熱源が空気側になって排熱回収ができず、省エネルギーを考慮するうえでは改善の余地がある。 Further, for example, when the heat pump type air conditioner with a hot water supply function disclosed in Patent Document 1 operates in the cooling + hot water supply mode, the cooling refrigeration cycle and the hot water supply refrigeration cycle are different from each other. However, there is room for improvement when considering the energy saving.

そこで本発明は、冷房単独モード、冷房＋給湯モード、暖房単独モード、暖房＋給湯モード、及び給湯単独モードの各動作モードで動作可能で、冷房単独モード、及び給湯単独モードで動作するときにも熱交換能力のほぼ全てを冷房及び給湯に利用できる給湯機能付ヒートポンプ式空気調和機を提供することを課題とする。 Therefore, the present invention can operate in each operation mode of the cooling only mode, the cooling + hot water supply mode, the heating only mode, the heating + hot water supply mode, and the hot water supply only mode, and also when operating in the cooling only mode and the hot water supply only mode. It is an object of the present invention to provide a heat pump type air conditioner with a hot water supply function that can use almost all of the heat exchange capacity for cooling and hot water supply.

前記課題を解決するため、本発明は、冷媒を圧縮する圧縮機と、負荷に供給される被熱交換体と前記冷媒が熱交換する空調用熱交換器と、外気と前記冷媒が熱交換する空気側熱交換器と、給湯水と前記冷媒が熱交換する給湯熱交換器と、液化した前記冷媒を減圧膨張させる膨張装置と、前記冷媒の流通を制御する制御弁と、を前記冷媒が流通する冷媒管で配管接続した冷媒回路を備える給湯機能付ヒートポンプ式空気調和機とする。そして、前記給湯熱交換器は、前記圧縮機で圧縮された前記冷媒が供給される第１給湯熱交換器と、前記第１給湯熱交換器と直列に配設される第２給湯熱交換器を含み、前記給湯水の供給源から前記第２給湯熱交換器を経由して前記第１給湯熱交換器まで、前記給湯水が流通する給湯水管を配管して構成され、前記空調用熱交換器は前記第２給湯熱交換器と並列に配設され、前記制御弁は、前記第１給湯熱交換器を流通した後の前記冷媒の流通経路を切り換える四方弁と、前記第２給湯熱交換器及び前記空調用熱交換器の前記冷媒の流通を制御する熱交換器用弁機構と、を含み、前記四方弁は、前記第１給湯熱交換器を前記空気側熱交換器に接続する第１状態と、前記第１給湯熱交換器を前記第２給湯熱交換器に接続する第２状態と、が切り換わるように配設されていることを特徴とする。 In order to solve the above problems, the present invention provides a compressor for compressing a refrigerant, a heat exchanger supplied to a load, a heat exchanger for air conditioning in which the refrigerant performs heat exchange, and heat exchange between the outside air and the refrigerant. The refrigerant flows through an air-side heat exchanger, a hot water supply heat exchanger that exchanges heat between the hot water and the refrigerant, an expansion device that decompresses and expands the liquefied refrigerant, and a control valve that controls the flow of the refrigerant. A heat pump type air conditioner with a hot water supply function including a refrigerant circuit piped by a refrigerant pipe is provided. The hot water supply heat exchanger includes a first hot water supply heat exchanger to which the refrigerant compressed by the compressor is supplied, and a second hot water supply heat exchanger disposed in series with the first hot water supply heat exchanger. A hot water supply pipe through which the hot water is circulated from the hot water supply source to the first hot water heat exchanger via the second hot water heat exchanger, and the heat exchange for air conditioning. The heater is arranged in parallel with the second hot water supply heat exchanger, and the control valve is a four-way valve that switches a flow path of the refrigerant after flowing through the first hot water supply heat exchanger, and the second hot water supply heat exchange. seen containing a heat exchanger valve mechanism for controlling the flow of vessel and the refrigerant of the air-conditioning heat exchanger, the said four-way valve, the connecting the first hot water supply heat exchanger to the air-side heat exchanger 1 state and a second state in which the first hot water supply heat exchanger is connected to the second hot water supply heat exchanger. Characterized in that it is arranged so Waru.

本発明によると、第１給湯熱交換器に、圧縮機で圧縮された高温高圧の冷媒を供給することができる。さらに、四方弁を切り換えることで、空調用熱交換器に、高温の冷媒と低温の冷媒のいずれも供給可能になる。この構成によって、１つの冷凍サイクルで、暖房と冷房の切換が可能になり、さらには、給湯が可能になる。したがって、一つの冷凍サイクルで、冷房単独モード、冷房＋給湯モード、暖房単独モード、暖房＋給湯モード、及び給湯単独モードの各動作モードを切り換えることが可能になる。 According to the present invention, the high-temperature and high-pressure refrigerant compressed by the compressor can be supplied to the first hot water supply heat exchanger. Furthermore, by switching the four-way valve, it becomes possible to supply either a high-temperature refrigerant or a low-temperature refrigerant to the air conditioner heat exchanger. With this configuration, heating and cooling can be switched in one refrigeration cycle, and hot water can be supplied. Accordingly, it is possible to switch between the operation modes of the cooling only mode, the cooling + hot water supply mode, the heating only mode, the heating + hot water supply mode, and the hot water supply only mode in one refrigeration cycle.

また、前記熱交換器用弁機構は、前記第２給湯熱交換器の前記冷媒の流通を制御する第１制御バルブと、前記空調用熱交換器の前記冷媒の流通を制御する第２制御バルブと、を含んで構成されることを特徴とする。 Further, the heat exchanger valve mechanism includes a first control valve that controls the flow of the refrigerant in the second hot water supply heat exchanger, and a second control valve that controls the flow of the refrigerant in the heat exchanger for air conditioning. It is characterized by including.

この構成によって、第１制御バルブで第２給湯熱交換器の冷媒の流通を制御することができ、第２制御バルブで空調用熱交換器の冷媒の流通を制御できる。したがって、第２給湯熱交換器の冷媒の流通と空調用熱交換器の冷媒の流通を独立して制御できる。 With this configuration, the flow of the refrigerant in the second hot water supply heat exchanger can be controlled by the first control valve, and the flow of the refrigerant in the heat exchanger for air conditioning can be controlled by the second control valve. Therefore, the distribution of the refrigerant in the second hot water supply heat exchanger and the distribution of the refrigerant in the heat exchanger for air conditioning can be controlled independently.

また、前記第１給湯熱交換器は、前記圧縮機から前記四方弁に向う前記冷媒の流通経路に備わることを特徴とする。 Further, the first hot water supply heat exchanger is provided in a flow path of the refrigerant from the compressor toward the four-way valve.

この構成によって、圧縮機で圧縮された高温高圧の冷媒を第１給湯熱交換器に供給できる。したがって、第１給湯熱交換器で、給湯水を効率よく加熱できる。 With this configuration, the high-temperature and high-pressure refrigerant compressed by the compressor can be supplied to the first hot water supply heat exchanger. Therefore, hot water can be efficiently heated by the first hot water supply heat exchanger.

本発明によると、冷房単独モード、冷房＋給湯モード、暖房単独モード、暖房＋給湯モード、及び給湯単独モードの各動作モードで動作可能で、冷房単独モード、及び給湯単独モードで動作するときにも熱交換能力のほぼ全てを冷房及び給湯に利用できる給湯機能付ヒートポンプ式空気調和機を提供できる。 According to the present invention, it is possible to operate in each operation mode of the cooling only mode, the cooling + hot water supply mode, the heating only mode, the heating + hot water supply mode, and the hot water supply only mode, and also when operating in the cooling only mode and the hot water supply only mode. A heat pump type air conditioner with a hot water supply function that can use almost all of the heat exchange capacity for cooling and hot water supply can be provided.

冷房単独モードで動作するように設定された給湯機能付ヒートポンプ式空気調和機を示す図である。It is a figure which shows the heat pump type air conditioner with a hot_water | molten_metal supply function set so that it might operate | move by the air_conditioning | cooling single mode. 冷房＋給湯モードで動作するように設定された給湯機能付ヒートポンプ式空気調和機を示す図である。It is a figure which shows the heat pump type air conditioner with a hot_water | molten_metal supply function set so that it might operate | move in air_conditioning | cooling + hot-water supply mode. 暖房単独モードで動作するように設定された給湯機能付ヒートポンプ式空気調和機を示す図である。It is a figure which shows the heat pump type air conditioner with a hot-water supply function set so that it may operate | move in heating single mode. 暖房＋給湯モードで動作するように設定された給湯機能付ヒートポンプ式空気調和機を示す図である。It is a figure which shows the heat pump type air conditioner with a hot_water | molten_metal supply function set to operate | move in heating + hot-water supply mode. 給湯単独モードで動作するように設定された給湯機能付ヒートポンプ式空気調和機を示す図である。It is a figure which shows the heat pump type | formula air conditioner with a hot_water | molten_metal supply function set so that it might operate | move in the hot water supply independent mode. 給湯単独モードで動作しているときに除霜運転するように設定された給湯機能付ヒートポンプ式空気調和機を示す図である。It is a figure which shows the heat pump type air conditioner with a hot_water | molten_metal supply function set so that a defrost operation may be performed when it operate | moves in the hot water supply independent mode.

以下、本発明を実施するための形態について、適宜図を参照して詳細に説明する。
図１に示すように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、圧縮機２、第１給湯熱交換器３、四方弁４、空気側熱交換器５、膨張弁６（膨張装置）、第２給湯熱交換器７が直列に配置され、冷媒Ｒｆが流通する流通経路を形成する冷媒管１０で配管接続される。さらに、第２給湯熱交換器７と並列に、空調用熱交換器としての水側熱交換器８が冷媒管１０で配管接続され、第２給湯熱交換器７の冷媒Ｒｆの流通を制御する第１制御バルブ７ａと、水側熱交換器８の冷媒Ｒｆの流通を制御する第２制御バルブ８ａとが備わって冷媒回路１ａを形成し、冷凍サイクルを構成している。
このように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、１つの冷凍サイクルを備えて構成される。 Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, a heat pump type air conditioner 1 with a hot water supply function according to this embodiment includes a compressor 2, a first hot water supply heat exchanger 3, a four-way valve 4, an air side heat exchanger 5, an expansion valve 6 ( The expansion device) and the second hot water supply heat exchanger 7 are arranged in series, and are piped by a refrigerant pipe 10 that forms a flow path through which the refrigerant Rf flows. Further, in parallel with the second hot water supply heat exchanger 7, a water-side heat exchanger 8 as an air conditioning heat exchanger is connected by a refrigerant pipe 10 to control the flow of the refrigerant Rf in the second hot water supply heat exchanger 7. A first control valve 7a and a second control valve 8a that controls the flow of the refrigerant Rf in the water-side heat exchanger 8 are provided to form the refrigerant circuit 1a and constitute a refrigeration cycle.
Thus, the heat pump type air conditioner 1 with a hot water supply function according to the present embodiment is configured to include one refrigeration cycle.

冷媒管１０には、膨張弁６と第２給湯熱交換器７の間に第１接続部Ｐ１が形成され、第２給湯熱交換器７と四方弁４の間に第２接続部Ｐ２が形成される。
冷媒管１０は、第１接続部Ｐ１と第２接続部Ｐ２でそれぞれ分岐し、第１接続部Ｐ１と第２接続部Ｐ２の間が並列に配管される。
そして、第１接続部Ｐ１と第２接続部Ｐ２の間で並列に配管される冷媒管１０の一方に第２給湯熱交換器７が接続され、他方に水側熱交換器８が接続されている。 In the refrigerant pipe 10, a first connection portion P 1 is formed between the expansion valve 6 and the second hot water supply heat exchanger 7, and a second connection portion P 2 is formed between the second hot water supply heat exchanger 7 and the four-way valve 4. Is done.
The refrigerant pipe 10 branches at the first connection part P1 and the second connection part P2, respectively, and the first connection part P1 and the second connection part P2 are connected in parallel.
And the 2nd hot water supply heat exchanger 7 is connected to one side of the refrigerant pipe 10 piped in parallel between the 1st connection part P1 and the 2nd connection part P2, and the water side heat exchanger 8 is connected to the other. Yes.

また、給湯機能付ヒートポンプ式空気調和機１には、給湯水Ｗ２（図２参照）が流通する給湯水管１１と冷暖房用水Ｗ１が流通する冷暖房水管１２が配管される。
給湯水管１１は、給湯水Ｗ２の供給源である給水栓２０ａと第２給湯熱交換器７、第２給湯熱交換器７と第１給湯熱交換器３、及び第１給湯熱交換器３と給湯器２０を配管接続する。
この構成によって、給水栓２０ａから供給される給湯水Ｗ２が第２給湯熱交換器７、第１給湯熱交換器３を経由して給湯器２０まで流通する給湯水回路が形成される。
冷暖房水管１２は、給湯機能付ヒートポンプ式空気調和機１の負荷である冷暖房機３０内を、冷暖房機３０（負荷）に供給される被熱交換体となる冷暖房用水Ｗ１が循環するように配管され、冷暖房水管１２の一部は水側熱交換器８を通っている。 The heat pump air conditioner 1 with a hot water supply function is provided with a hot water supply pipe 11 through which hot water W2 (see FIG. 2) flows and a cooling / heating water pipe 12 through which cooling / heating water W1 flows.
The hot water supply pipe 11 includes a water tap 20a, a second hot water heat exchanger 7, a second hot water heat exchanger 7, a first hot water heat exchanger 3, and a first hot water heat exchanger 3, which are supply sources of the hot water W2. The water heater 20 is connected by piping.
With this configuration, a hot water supply circuit is formed in which hot water W2 supplied from the water tap 20a flows to the water heater 20 via the second hot water heat exchanger 7 and the first hot water heat exchanger 3.
The cooling / heating water pipe 12 is piped so that cooling / heating water W1 serving as a heat exchanger to be supplied to the cooling / heating machine 30 (load) circulates in the cooling / heating machine 30 which is a load of the heat pump air conditioner 1 with a hot water supply function. A part of the cooling / heating water pipe 12 passes through the water-side heat exchanger 8.

第１給湯熱交換器３は、圧縮機２から四方弁４に向う冷媒Ｒｆの流通経路に備わる。そして、圧縮機２で圧縮され、高温高圧になった冷媒Ｒｆが第１給湯熱交換器３に供給される。 The first hot water supply heat exchanger 3 is provided in the flow path of the refrigerant Rf from the compressor 2 toward the four-way valve 4. Then, the refrigerant Rf compressed by the compressor 2 and having a high temperature and a high pressure is supplied to the first hot water supply heat exchanger 3.

圧縮機２は、図示しない駆動手段（エンジン、モータなど）で駆動し、低圧側２ａから導入される気体の冷媒Ｒｆを圧縮して高圧側２ｂから高温高圧の気体の冷媒Ｒｆを吐出する。
第１給湯熱交換器３には冷媒Ｒｆの流通路と給湯水Ｗ２（図２参照）の流通路が形成され、圧縮機２から直接供給される高温高圧の冷媒Ｒｆが給湯水Ｗ２と熱交換して給湯水Ｗ２を加熱し、高温の給湯水Ｗ２を生成する。
第２給湯熱交換器７には冷媒Ｒｆの流通路と給湯水Ｗ２の流通路が形成され、冷媒Ｒｆと給湯水Ｗ２が熱交換する。
そして、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、第１給湯熱交換器３、第２給湯熱交換器７、及び給湯水管１１を含んで給湯熱交換器を構成する。
また、空気側熱交換器５には冷媒Ｒｆの流通路が形成され、送風ファン５ａで強制的に送風される外気と冷媒Ｒｆが熱交換する。 The compressor 2 is driven by driving means (engine, motor, etc.) not shown, compresses the gaseous refrigerant Rf introduced from the low pressure side 2a, and discharges the high temperature and high pressure gaseous refrigerant Rf from the high pressure side 2b.
The first hot water supply heat exchanger 3 has a flow path for the refrigerant Rf and a flow path for the hot water W2 (see FIG. 2), and the high-temperature and high-pressure refrigerant Rf supplied directly from the compressor 2 exchanges heat with the hot water W2. Then, the hot water supply water W2 is heated to generate high temperature hot water supply water W2.
A flow path for the refrigerant Rf and a flow path for the hot water W2 are formed in the second hot water supply heat exchanger 7, and the refrigerant Rf and the hot water W2 exchange heat.
And the heat pump type air conditioner 1 with a hot water supply function which concerns on this embodiment comprises the 1st hot water supply heat exchanger 3, the 2nd hot water supply heat exchanger 7, and the hot water supply water pipe 11, and comprises a hot water supply heat exchanger.
In addition, a flow path for the refrigerant Rf is formed in the air-side heat exchanger 5, and the outside air forcedly blown by the blower fan 5a and the refrigerant Rf exchange heat.

本実施形態に係る第１給湯熱交換器３は、冷媒Ｒｆの顕熱を回収する機能を有する。また、空気側熱交換器５、第２給湯熱交換器７、及び水側熱交換器８は、冷媒Ｒｆの潜熱を回収する機能を有する。これら各熱交換器の熱交換容量は、冷媒Ｒｆの有する顕熱と潜熱の熱量比に応じて設定されることが好適である。
例えば、冷媒ＲｆとしてＲ−１３４Ａを用いた場合、第１給湯熱交換器３の熱交換容量：第２給湯熱交換器７の熱交換容量を、１：９〜２：８に設定することが好適である。また、空気側熱交換器５、及び水側熱交換器８の熱交換容量を、第２給湯熱交換器７の熱交換容量と同程度に設定することが好適である。 The first hot water supply heat exchanger 3 according to this embodiment has a function of recovering sensible heat of the refrigerant Rf. Moreover, the air side heat exchanger 5, the 2nd hot water supply heat exchanger 7, and the water side heat exchanger 8 have a function which collect | recovers the latent heats of the refrigerant | coolant Rf. The heat exchange capacity of each of these heat exchangers is preferably set according to the heat quantity ratio between the sensible heat and latent heat of the refrigerant Rf.
For example, when R-134A is used as the refrigerant Rf, the heat exchange capacity of the first hot water supply heat exchanger 3: the heat exchange capacity of the second hot water supply heat exchanger 7 may be set to 1: 9 to 2: 8. Is preferred. In addition, it is preferable to set the heat exchange capacities of the air-side heat exchanger 5 and the water-side heat exchanger 8 to the same extent as the heat exchange capacities of the second hot water supply heat exchanger 7.

このように設定すると、第１給湯熱交換器３は、冷媒Ｒｆの顕熱のみを回収できる。
第１給湯熱交換器３が冷媒Ｒｆの顕熱のみならず潜熱を回収すると、給湯機能付ヒートポンプ式空気調和機１の冷凍サイクルの全容積に対する、液体の状態で存在する冷媒Ｒｆの容積の割合が大きくなり、冷媒Ｒｆの必要量を増やす必要がある。
第１給湯熱交換器３が冷媒Ｒｆの顕熱のみを回収できる構成とすることで、冷媒Ｒｆの必要量を減らすことができる。 If it sets in this way, the 1st hot water supply heat exchanger 3 can collect | recover only the sensible heat of the refrigerant | coolant Rf.
When the first hot water supply heat exchanger 3 collects not only the sensible heat of the refrigerant Rf but also latent heat, the ratio of the volume of the refrigerant Rf existing in the liquid state to the total volume of the refrigeration cycle of the heat pump air conditioner 1 with a hot water supply function And the required amount of the refrigerant Rf needs to be increased.
By setting the first hot water supply heat exchanger 3 to recover only the sensible heat of the refrigerant Rf, the required amount of the refrigerant Rf can be reduced.

膨張弁６は、液体の冷媒Ｒｆを断熱膨張して減圧（減圧膨張）し、冷媒Ｒｆを低温低圧にする。
本実施形態において、膨張弁６は、空気側熱交換器５と第１接続部Ｐ１の間に配置されている。
この構成によって、冷媒Ｒｆが第２給湯熱交換器７、水側熱交換器８のいずれに流通する場合であっても、膨張弁６は冷媒Ｒｆを減圧できる。すなわち、膨張弁６を１つ備えればよく、給湯機能付ヒートポンプ式空気調和機１の構造が複雑になることが避けられ、且つ、製造コストを抑えることができる。 The expansion valve 6 adiabatically expands and depressurizes (decompresses and expands) the liquid refrigerant Rf to make the refrigerant Rf low temperature and low pressure.
In this embodiment, the expansion valve 6 is arrange | positioned between the air side heat exchanger 5 and the 1st connection part P1.
With this configuration, the expansion valve 6 can depressurize the refrigerant Rf regardless of whether the refrigerant Rf flows through the second hot water supply heat exchanger 7 or the water-side heat exchanger 8. That is, it is only necessary to provide one expansion valve 6, so that the structure of the heat pump air conditioner 1 with a hot water supply function can be avoided and the manufacturing cost can be reduced.

また、水側熱交換器８には冷媒Ｒｆの流通路と冷暖房用水Ｗ１の流通路が形成され、冷媒Ｒｆと冷暖房用水Ｗ１が熱交換する。 The water-side heat exchanger 8 is formed with a flow path for the refrigerant Rf and a flow path for the cooling / heating water W1, and the refrigerant Rf and the cooling / heating water W1 exchange heat.

図１に示すように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、第２給湯熱交換器７と水側熱交換器８が並列に配置され、熱交換器用弁機構としての第１制御バルブ７ａ、第２制御バルブ８ａによって冷媒Ｒｆの流通を制御することで、第２給湯熱交換器７と水側熱交換器８のどちらか一方に冷媒Ｒｆを供給できる。又は、第２給湯熱交換器７と水側熱交換器８の両方に冷媒Ｒｆを供給することができ、さらには、第２給湯熱交換器７と水側熱交換器８の両方への冷媒Ｒｆの供給を停止することもできる。
第１制御バルブ７ａと第２制御バルブ８ａは、例えば開閉弁である。 As shown in FIG. 1, the heat pump type air conditioner 1 with a hot water supply function according to the present embodiment includes a second hot water supply heat exchanger 7 and a water side heat exchanger 8 arranged in parallel, and serves as a heat exchanger valve mechanism. By controlling the flow of the refrigerant Rf by the first control valve 7a and the second control valve 8a, the refrigerant Rf can be supplied to either the second hot water supply heat exchanger 7 or the water side heat exchanger 8. Or the refrigerant | coolant Rf can be supplied to both the 2nd hot water supply heat exchanger 7 and the water side heat exchanger 8, and also the refrigerant | coolant to both the 2nd hot water supply heat exchanger 7 and the water side heat exchanger 8 can be supplied. The supply of Rf can also be stopped.
The first control valve 7a and the second control valve 8a are, for example, on-off valves.

例えば、図５に示すように、第１制御バルブ７ａを開弁して第２制御バルブ８ａを閉弁すると冷媒Ｒｆは第２給湯熱交換器７に供給される。すなわち、冷媒Ｒｆは第２給湯熱交換器７を流通し、給湯水Ｗ２と熱交換する。
また、図１に示すように、第１制御バルブ７ａを閉弁して第２制御バルブ８ａを開弁すると冷媒Ｒｆは水側熱交換器８に供給される。すなわち、冷媒Ｒｆは水側熱交換器８を流通し、冷暖房用水Ｗ１と熱交換する。 For example, as shown in FIG. 5, when the first control valve 7 a is opened and the second control valve 8 a is closed, the refrigerant Rf is supplied to the second hot water supply heat exchanger 7. That is, the refrigerant Rf flows through the second hot water supply heat exchanger 7 and exchanges heat with the hot water W2.
Further, as shown in FIG. 1, when the first control valve 7 a is closed and the second control valve 8 a is opened, the refrigerant Rf is supplied to the water-side heat exchanger 8. That is, the refrigerant Rf flows through the water-side heat exchanger 8 and exchanges heat with the cooling / heating water W1.

水側熱交換器８で冷媒Ｒｆと熱交換して冷却又は加熱された冷暖房用水Ｗ１は冷暖房水管１２を流通して、例えばユーザの居室（図示せず）に備わる冷暖房機３０に供給される。そして、冷暖房機３０は、冷暖房用水Ｗ１が冷却されている場合は居室を冷房し、冷暖房用水Ｗ１が加熱されている場合は居室を暖房する。
また、第１給湯熱交換器３で加熱された高温の給湯水Ｗ２（図２参照）は、給湯器２０まで給湯水管１１を流通し、給湯器２０からユーザに供給される。 The cooling / heating water W1 cooled or heated by exchanging heat with the refrigerant Rf in the water-side heat exchanger 8 flows through the cooling / heating water pipe 12 and is supplied to, for example, the cooling / heating machine 30 provided in the user's room (not shown). The air conditioner 30 cools the living room when the cooling / heating water W1 is cooled, and heats the living room when the cooling / heating water W1 is heated.
Moreover, the hot hot water W2 (see FIG. 2) heated by the first hot water supply heat exchanger 3 flows through the hot water supply pipe 11 to the hot water heater 20 and is supplied from the hot water heater 20 to the user.

四方弁４は、４つの接続口４ａ、４ｂ、４ｃ、及び４ｄを有し、弁体４ｅの動作によって、接続口４ａ、４ｂが連通するとともに接続口４ｃ、４ｄが連通する第１状態と、図３に示すように接続口４ａ、４ｃが連通するとともに接続口４ｂ、４ｄが連通する第２状態とを切り換えることができる。 The four-way valve 4 has four connection ports 4a, 4b, 4c, and 4d, and a first state in which the connection ports 4a and 4b communicate with each other and the connection ports 4c and 4d communicate with each other by the operation of the valve body 4e. As shown in FIG. 3, it is possible to switch between the second state in which the connection ports 4a and 4c communicate and the connection ports 4b and 4d communicate.

接続口４ａは、冷媒管１０を介して第２給湯熱交換器７、及び水側熱交換器８と接続され、接続口４ｂは、冷媒管１０を介して圧縮機２の低圧側２ａと接続される。
また、接続口４ｃは、冷媒管１０を介して第１給湯熱交換器３と接続され、接続口４ｄは、冷媒管１０を介して空気側熱交換器５と接続される。
この構成によって、四方弁４は、第１給湯熱交換器３を流通した後の冷媒Ｒｆの流通経路を切り換えることができる。 The connection port 4a is connected to the second hot water supply heat exchanger 7 and the water-side heat exchanger 8 via the refrigerant pipe 10, and the connection port 4b is connected to the low-pressure side 2a of the compressor 2 via the refrigerant pipe 10. Is done.
The connection port 4 c is connected to the first hot water supply heat exchanger 3 through the refrigerant tube 10, and the connection port 4 d is connected to the air-side heat exchanger 5 through the refrigerant tube 10.
With this configuration, the four-way valve 4 can switch the flow path of the refrigerant Rf after flowing through the first hot water supply heat exchanger 3.

四方弁４、第１制御バルブ７ａ、及び第２制御バルブ８ａは、それぞれ制御装置９と接続され、四方弁４は、制御装置９が出力する制御信号で第１状態と第２状態が切り換わるように構成される。
また、第１制御バルブ７ａ、第２制御バルブ８ａは、制御装置９が出力する制御信号で、それぞれ個別に開弁状態と閉弁状態が切り換わるように構成される。
本実施形態においては、四方弁４、第１制御バルブ７ａ、及び第２制御バルブ８ａをまとめて、冷媒回路１ａにおける冷媒Ｒｆの流通を制御する制御弁とする。 The four-way valve 4, the first control valve 7a, and the second control valve 8a are each connected to the control device 9, and the four-way valve 4 is switched between the first state and the second state by a control signal output from the control device 9. Configured as follows.
In addition, the first control valve 7a and the second control valve 8a are configured to individually switch between a valve-open state and a valve-close state by control signals output from the control device 9.
In the present embodiment, the four-way valve 4, the first control valve 7a, and the second control valve 8a are collectively used as a control valve that controls the flow of the refrigerant Rf in the refrigerant circuit 1a.

なお、制御装置９は、例えば圧縮機２の図示しない制御部と接続され、圧縮機２は制御装置９が出力する信号で、駆動開始及び停止が制御される構成であってもよい。 The control device 9 may be connected to, for example, a control unit (not shown) of the compressor 2, and the compressor 2 may be configured to control driving start and stop by a signal output from the control device 9.

例えば制御装置９に、冷暖房機３０の機能モード（冷房機能、暖房機能、ＯＦＦ）を切り換えるための切り換えボタン９ａが備わる構成とすると、ユーザは切り換えボタン９ａを操作して冷暖房機３０の機能モードを切り換えることができる。
制御装置９は、ユーザが切り換えボタン９ａを操作して設定する冷暖房機３０の機能モードに基づいて、給湯機能付ヒートポンプ式空気調和機１を設定する。 For example, if the control device 9 is configured to include a switching button 9a for switching the function mode (cooling function, heating function, OFF) of the air conditioner 30, the user operates the switch button 9a to change the function mode of the air conditioner 30. Can be switched.
The control device 9 sets the heat pump type air conditioner 1 with a hot water supply function based on the function mode of the air conditioner 30 set by the user operating the switching button 9a.

さらに制御装置９には、給湯水Ｗ２（図２参照）が給湯器２０からユーザに供給中であることを示す信号が入力され、制御装置９は、給湯器２０が給湯水Ｗ２を供給中のとき給湯モードで動作するように、給湯機能付ヒートポンプ式空気調和機１を設定する。
そして、制御装置９が、圧縮機２の図示しない制御部に、駆動開始を指示する制御信号を入力すると圧縮機２が駆動を開始し、給湯機能付ヒートポンプ式空気調和機１が動作を開始する。 Further, a signal indicating that hot water W2 (see FIG. 2) is being supplied from the water heater 20 to the user is input to the control device 9, and the controller 9 is supplying the hot water W2 to the user. The heat pump type air conditioner 1 with a hot water supply function is set so that it sometimes operates in the hot water supply mode.
And if the control apparatus 9 inputs the control signal which instruct | indicates a drive start to the control part which is not shown in figure of the compressor 2, the compressor 2 will start a drive and the heat pump type air conditioner 1 with a hot water supply function will start operation | movement. .

なお、図１〜図６において、冷媒回路１ａにおける冷媒Ｒｆの流れを示す矢印が破線のとき冷媒Ｒｆは気体であることを示し、矢印が一点鎖線のとき冷媒Ｒｆは液体であることを示す。また、矢印が細かい破線（ドット線）のとき冷媒Ｒｆは気体と液体が混合した状態（気液混合）であることを示す。 1 to 6, when the arrow indicating the flow of the refrigerant Rf in the refrigerant circuit 1a is a broken line, the refrigerant Rf is a gas, and when the arrow is a dashed line, the refrigerant Rf is a liquid. Further, when the arrow is a fine broken line (dot line), the refrigerant Rf indicates that gas and liquid are mixed (gas-liquid mixing).

例えばユーザが、制御装置９の切り換えボタン９ａを操作して冷暖房機３０の機能モードを冷房機能に設定した場合、制御装置９は、冷房単独モードで動作するように、給湯機能付ヒートポンプ式空気調和機１を設定する。具体的に制御装置９は、図１に示すように、四方弁４を第１状態に切り換えて接続口４ａと接続口４ｂを連通するとともに接続口４ｃと接続口４ｄを連通する。さらに、制御装置９は、第１制御バルブ７ａを閉弁して第２制御バルブ８ａを開弁する。 For example, when the user operates the switching button 9a of the control device 9 to set the function mode of the air conditioner 30 to the cooling function, the control device 9 is configured to operate in the cooling only mode. Set machine 1. Specifically, as shown in FIG. 1, the control device 9 switches the four-way valve 4 to the first state so as to communicate the connection port 4a and the connection port 4b and to communicate the connection port 4c and the connection port 4d. Further, the control device 9 closes the first control valve 7a and opens the second control valve 8a.

制御装置９から入力される制御信号に応じて圧縮機２が駆動開始すると、圧縮機２で圧縮され高圧側２ｂから吐出された高温高圧の気体の冷媒Ｒｆは、四方弁４の接続口４ｃから接続口４ｄを経由して空気側熱交換器５を流通する。
冷媒Ｒｆは、空気側熱交換器５を流通するときに相対的に低温な外気によって冷却されて凝縮して液化し、さらに、液化した冷媒Ｒｆは膨張弁６で断熱膨張して減圧し、わずかな一部が気化して低温の気液混合の状態になる。 When the compressor 2 starts to be driven in response to a control signal input from the control device 9, the high-temperature and high-pressure gaseous refrigerant Rf compressed by the compressor 2 and discharged from the high-pressure side 2 b passes through the connection port 4 c of the four-way valve 4. The air-side heat exchanger 5 is circulated through the connection port 4d.
The refrigerant Rf is cooled and condensed by the relatively low temperature outside air when it flows through the air-side heat exchanger 5, and the liquefied refrigerant Rf is adiabatically expanded and decompressed by the expansion valve 6 to be slightly reduced. A part of the gas is vaporized and becomes a low temperature gas-liquid mixed state.

第１制御バルブ７ａは閉弁状態であり、第２制御バルブ８ａが開弁状態であることから、冷媒Ｒｆは、ほぼ液体の気液混合の状態で水側熱交換器８を流通し、相対的に高温の冷暖房用水Ｗ１と熱交換して冷暖房用水Ｗ１を冷却する。そして冷媒Ｒｆは全て気化する。
水側熱交換器８で気化した冷媒Ｒｆは、四方弁４の接続口４ａから接続口４ｂを経由して、圧縮機２に低圧側２ａから導入されて圧縮される。 Since the first control valve 7a is in the closed state and the second control valve 8a is in the open state, the refrigerant Rf circulates through the water-side heat exchanger 8 in a substantially liquid-gas-liquid mixture state, and the relative Thus, heat exchange with the high-temperature air conditioning water W1 is performed to cool the air conditioning water W1. All the refrigerant Rf is vaporized.
The refrigerant Rf vaporized by the water-side heat exchanger 8 is introduced from the low-pressure side 2a into the compressor 2 through the connection port 4a of the four-way valve 4 through the connection port 4b and compressed.

このように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、冷房単独モードで動作するとき、冷媒Ｒｆのほぼ全てを膨張弁６で低温低圧の液体にすることができ、さらに、冷媒Ｒｆのほぼ全てを水側熱交換器８で気化して冷暖房用水Ｗ１を冷却できる。換言すると、給湯機能付ヒートポンプ式空気調和機１の熱交換能力のほぼ全てを冷暖房用水Ｗ１の冷却に利用することができる。すなわち、給湯機能付ヒートポンプ式空気調和機１の熱交換能力のほぼ全てを冷房に利用できることになり、冷房能力を向上できる。 Thus, when the heat pump type air conditioner 1 with a hot water supply function according to the present embodiment operates in the cooling only mode, almost all of the refrigerant Rf can be converted into a low-temperature and low-pressure liquid by the expansion valve 6. Almost all of the refrigerant Rf can be vaporized by the water-side heat exchanger 8 to cool the cooling / heating water W1. In other words, almost all of the heat exchange capability of the heat pump type air conditioner 1 with a hot water supply function can be used for cooling the cooling / heating water W1. That is, almost all of the heat exchange capability of the heat pump air conditioner 1 with a hot water supply function can be used for cooling, and the cooling capability can be improved.

次に、給湯機能付ヒートポンプ式空気調和機が、冷房＋給湯モードで動作する場合について説明する。
例えば、給湯機能付ヒートポンプ式空気調和機１が冷房単独モードで動作しているときに、ユーザが給湯器２０から給湯水Ｗ２の供給を受ける操作をした場合、図２に示すように給湯水管１１に給湯水Ｗ２が流通し、給湯機能付ヒートポンプ式空気調和機１は、冷房＋給湯モードで動作する。
このとき、第１制御バルブ７ａは閉弁状態であり、第２制御バルブ８ａは開弁状態である。 Next, the case where the heat pump type air conditioner with a hot water supply function operates in the cooling + hot water supply mode will be described.
For example, when the user performs an operation of receiving the supply of hot water W2 from the hot water heater 20 when the heat pump air conditioner 1 with a hot water function is operating in the cooling only mode, as shown in FIG. The hot water supply water W2 circulates and the heat pump type air conditioner 1 with a hot water supply function operates in the cooling + hot water supply mode.
At this time, the first control valve 7a is closed, and the second control valve 8a is opened.

給水栓２０ａから供給される給湯水Ｗ２は、第２給湯熱交換器７、給湯水管１１を経由して第１給湯熱交換器３を流通するときに、圧縮機２で圧縮された高温高圧の冷媒Ｒｆから顕熱と一部の潜熱を受け取って高温の給湯水Ｗ２になり、給湯器２０まで給湯水管１１を流通してユーザに供給される。 Hot water W2 supplied from the water tap 20a is a high-temperature and high-pressure compressed by the compressor 2 when flowing through the first hot-water supply heat exchanger 3 via the second hot-water supply heat exchanger 7 and the hot-water supply pipe 11. The sensible heat and a part of latent heat are received from the refrigerant Rf to become high-temperature hot water W2, and are supplied to the user through the hot water pipe 11 to the water heater 20.

第１給湯熱交換器３で顕熱と一部の潜熱を給湯水Ｗ２に与えて温度が低下し、わずかな一部が凝縮した冷媒Ｒｆは、ほぼ気体の気液混合の状態で四方弁４の接続口４ｃから接続口４ｄを経由して空気側熱交換器５を流通する。
冷媒Ｒｆは、空気側熱交換器５を流通するときに相対的に低温の外気によって冷却されて凝縮して液化し、さらに、液化した冷媒Ｒｆは膨張弁６で断熱膨張して減圧し、わずかな一部が気化して低温の気液混合の状態になる。
その後、冷媒Ｒｆは、給湯機能付ヒートポンプ式空気調和機１が冷房単独モードで動作するときと同様に冷媒回路１ａを流通し、冷暖房用水Ｗ１を冷却する。 The sensible heat and a part of latent heat are given to the hot water W2 in the first hot water supply heat exchanger 3, and the refrigerant Rf whose temperature is reduced and slightly condensed is a four-way valve 4 in a substantially gas-liquid mixture state. The air side heat exchanger 5 is circulated from the connection port 4c through the connection port 4d.
The refrigerant Rf is cooled and condensed by relatively low temperature outside air when it flows through the air-side heat exchanger 5, and the liquefied refrigerant Rf is adiabatically expanded and decompressed by the expansion valve 6 to be slightly reduced. A part of the gas is vaporized and becomes a low temperature gas-liquid mixed state.
Then, the refrigerant | coolant Rf distribute | circulates the refrigerant | coolant circuit 1a similarly to when the heat pump type air conditioner 1 with a hot water supply function operate | moves in the air_conditioning | cooling single mode, and cools the water W1 for air conditioning.

このように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、冷房＋給湯モードで動作する場合、第１給湯熱交換器３において、冷媒Ｒｆの顕熱で給湯水Ｗ２を加熱できる。例えば冷房単独モードの場合、冷媒Ｒｆの顕熱は、空気側熱交換器５で排熱される熱量であることから、冷房＋給湯モードでは、一部の排熱を給湯水Ｗ２の加熱用に回収していることになり、給湯機能付ヒートポンプ式空気調和機１の省エネルギー化に寄与することができる。 Thus, the heat pump type air conditioner 1 with a hot water supply function according to the present embodiment can heat the hot water W2 with the sensible heat of the refrigerant Rf in the first hot water supply heat exchanger 3 when operating in the cooling + hot water supply mode. . For example, in the cooling only mode, the sensible heat of the refrigerant Rf is the amount of heat exhausted by the air-side heat exchanger 5, so in the cooling + hot water supply mode, a part of the exhaust heat is recovered for heating the hot water W2. Therefore, it is possible to contribute to energy saving of the heat pump type air conditioner 1 with a hot water supply function.

さらに、冷房単独モードの場合と同様に、冷媒Ｒｆのほぼ全てを膨張弁６で低温低圧の液体にすることができ、さらに、冷媒Ｒｆのほぼ全てを水側熱交換器８で気化して冷暖房用水Ｗ１を冷却できる。したがって、給湯機能付ヒートポンプ式空気調和機１の熱交換能力のほぼ全ての能力で冷暖房用水Ｗ１を冷却できることになり、冷房＋給湯モードで動作する場合であっても冷房能力を高く維持できる給湯機能付ヒートポンプ式空気調和機１を得られる。 Further, as in the case of the cooling only mode, almost all of the refrigerant Rf can be made into a low-temperature and low-pressure liquid by the expansion valve 6, and further, almost all of the refrigerant Rf is vaporized by the water-side heat exchanger 8 for cooling and heating. The water W1 can be cooled. Therefore, the cooling / heating water W1 can be cooled with almost all of the heat exchange capacity of the heat pump air conditioner 1 with a hot water supply function, and the hot water supply function that can maintain a high cooling capacity even when operating in the cooling + hot water supply mode. The attached heat pump type air conditioner 1 can be obtained.

次に、図３を参照して、給湯機能付ヒートポンプ式空気調和機１が暖房単独モードで動作する場合について説明する。 Next, with reference to FIG. 3, the case where the heat pump type air conditioner 1 with a hot water supply function operates in the heating only mode will be described.

例えばユーザが、制御装置９の切り換えボタン９ａを操作して冷暖房機３０の機能モードを暖房機能に設定した場合、制御装置９は、暖房単独モードで動作するように、給湯機能付ヒートポンプ式空気調和機１を設定する。具体的に制御装置９は、図３に示すように、四方弁４を第２状態に切り換えて接続口４ａと接続口４ｃを連通するとともに接続口４ｂと接続口４ｄを連通する。さらに、制御装置９は、第１制御バルブ７ａを閉弁して第２制御バルブ８ａを開弁する。 For example, when the user operates the switching button 9a of the control device 9 to set the function mode of the air conditioner 30 to the heating function, the control device 9 is a heat pump type air conditioner with a hot water supply function so as to operate in the heating only mode. Set machine 1. Specifically, as shown in FIG. 3, the control device 9 switches the four-way valve 4 to the second state to connect the connection port 4a and the connection port 4c, and to connect the connection port 4b and the connection port 4d. Further, the control device 9 closes the first control valve 7a and opens the second control valve 8a.

制御装置９から入力される制御信号に応じて圧縮機２が駆動を開始すると、圧縮機２で圧縮され高圧側２ｂから吐出された高温高圧の気体の冷媒Ｒｆは、四方弁４の接続口４ｃから接続口４ａを経由して冷媒管１０を流通する。
第１制御バルブ７ａが閉弁し、第２制御バルブ８ａが開弁していることから、冷媒Ｒｆは、水側熱交換器８を流通する。
そして冷媒Ｒｆは、水側熱交換器８で相対的に温度の低い冷暖房用水Ｗ１と熱交換して冷暖房用水Ｗ１を加熱し、気体の冷媒Ｒｆは凝縮して液化する。
加熱された冷暖房用水Ｗ１は温水となって冷暖房機３０を循環し、例えばユーザの居室（図示せず）を暖房する。 When the compressor 2 starts to be driven in accordance with a control signal input from the control device 9, the high-temperature and high-pressure gaseous refrigerant Rf compressed by the compressor 2 and discharged from the high-pressure side 2 b is connected to the connection port 4 c of the four-way valve 4. Circulates through the refrigerant pipe 10 via the connection port 4a.
Since the first control valve 7a is closed and the second control valve 8a is opened, the refrigerant Rf flows through the water-side heat exchanger 8.
The refrigerant Rf exchanges heat with the cooling / heating water W1 having a relatively low temperature in the water-side heat exchanger 8 to heat the cooling / heating water W1, and the gaseous refrigerant Rf is condensed and liquefied.
The heated cooling / heating water W1 becomes hot water and circulates through the cooling / heating device 30 to heat, for example, a user's room (not shown).

水側熱交換器８で凝縮して液化した冷媒Ｒｆは、膨張弁６で断熱膨張して減圧し、わずかな一部が気化して低温の気液混合の状態になる。
そして、冷媒Ｒｆは空気側熱交換器５を流通するときに相対的に高温の外気と熱交換して気化する。
気化した冷媒Ｒｆは、四方弁４の接続口４ｄから接続口４ｂを経由して、低圧側２ａから圧縮機２に導入されて圧縮され、高温高圧の冷媒Ｒｆが高圧側２ｂから吐出される。 The refrigerant Rf condensed and liquefied by the water-side heat exchanger 8 is adiabatically expanded and decompressed by the expansion valve 6, and a small part is vaporized to be in a low-temperature gas-liquid mixture state.
The refrigerant Rf is vaporized by exchanging heat with the relatively high temperature outside air when flowing through the air-side heat exchanger 5.
The vaporized refrigerant Rf is introduced into the compressor 2 from the low-pressure side 2a via the connection port 4d of the four-way valve 4 and compressed, and the high-temperature and high-pressure refrigerant Rf is discharged from the high-pressure side 2b.

また、給湯機能付ヒートポンプ式空気調和機１が暖房単独モードで動作しているときに、例えばユーザが給湯器２０から給湯水Ｗ２の供給を受ける操作をした場合、図４に示すように給湯水管１１に給湯水Ｗ２が流通し、給湯機能付ヒートポンプ式空気調和機１は、暖房＋給湯モードで動作する。
このとき、第１制御バルブ７ａは閉弁状態であり、第２制御バルブ８ａは開弁状態である。このように、第１制御バルブ７ａを閉弁状態にして、第２制御バルブ８ａを開弁状態にすることで、給湯機能付ヒートポンプ式空気調和機１の暖房能力を向上させることができる。
なお、給湯機能付ヒートポンプ式空気調和機１に要求される暖房能力が小さく、冷暖房機３０の負荷が小さいときは、第１制御バルブ７ａ、第２制御バルブ８ａをともに開弁状態にしてもよい。 Further, when the heat pump type air conditioner 1 with a hot water supply function is operating in the heating only mode, for example, when the user performs an operation of receiving the supply of hot water W2 from the hot water heater 20, as shown in FIG. The hot water supply water W2 circulates to 11, and the heat pump air conditioner 1 with a hot water supply function operates in the heating + hot water supply mode.
At this time, the first control valve 7a is closed, and the second control valve 8a is opened. Thus, the heating capability of the heat pump air conditioner 1 with a hot water supply function can be improved by closing the first control valve 7a and opening the second control valve 8a.
In addition, when the heating capability requested | required of the heat pump type air conditioner 1 with a hot water supply function is small and the load of the air conditioner 30 is small, you may open both the 1st control valve 7a and the 2nd control valve 8a. .

給水栓２０ａから供給される給湯水Ｗ２は、第１給湯熱交換器３を流通するときに、圧縮機２で圧縮された高温高圧の冷媒Ｒｆから顕熱と一部の潜熱を受け取って高温の給湯水Ｗ２になり、給湯器２０まで給湯水管１１を流通してユーザに供給される。 When the hot water W2 supplied from the water tap 20a flows through the first hot water supply heat exchanger 3, the hot water W2 receives sensible heat and a part of latent heat from the high-temperature and high-pressure refrigerant Rf compressed by the compressor 2, and has a high temperature. It becomes hot water W2 and is distributed to the hot water heater 20 through the hot water pipe 11 and supplied to the user.

第１給湯熱交換器３で顕熱と一部の潜熱を給湯水Ｗ２に与えて温度が低下し、わずかな一部が凝縮した冷媒Ｒｆは、ほぼ気体の気液混合の状態で四方弁４の接続口４ｃから接続口４ａを経由して冷媒管１０を流通する。
そして、冷媒Ｒｆは、給湯機能付ヒートポンプ式空気調和機１が暖房単独モードで動作するときと同様に冷媒回路１ａを流通し、冷暖房用水Ｗ１を加熱する。 The sensible heat and a part of latent heat are given to the hot water W2 in the first hot water supply heat exchanger 3, and the refrigerant Rf whose temperature is reduced and slightly condensed is a four-way valve 4 in a substantially gas-liquid mixture state. The refrigerant pipe 10 is circulated from the connection port 4c via the connection port 4a.
And the refrigerant | coolant Rf distribute | circulates the refrigerant circuit 1a similarly to when the heat pump type air conditioner 1 with a hot-water supply function operate | moves in heating only mode, and heats the water W1 for air conditioning.

このように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、暖房単独モード、及び暖房+給湯モードで動作できる。 Thus, the heat pump type air conditioner 1 with a hot water supply function according to the present embodiment can operate in the heating only mode and the heating + hot water supply mode.

次に、図５を参照して、給湯機能付ヒートポンプ式空気調和機１が給湯単独モードで動作する場合について説明する。 Next, with reference to FIG. 5, the case where the heat pump type air conditioner 1 with a hot water supply function operates in the hot water supply single mode will be described.

例えばユーザが、制御装置９の切り換えボタン９ａを操作して冷暖房機３０の機能モードをＯＦＦ（冷房機能、暖房機能共にＯＦＦのモード）に設定した場合、制御装置９は、給湯単独モードで動作するように給湯機能付ヒートポンプ式空気調和機１を設定する。
具体的に制御装置９は、図５に示すように、四方弁４を第２状態に切り換えて接続口４ａと接続口４ｃを連通するとともに接続口４ｂと接続口４ｄを連通する。さらに、制御装置９は、第１制御バルブ７ａを開弁して第２制御バルブ８ａを閉弁する。 For example, when the user operates the switching button 9a of the control device 9 to set the function mode of the air conditioner 30 to OFF (mode in which both the cooling function and the heating function are OFF), the control device 9 operates in the hot water supply only mode. Thus, the heat pump type air conditioner 1 with a hot water supply function is set.
Specifically, as shown in FIG. 5, the control device 9 switches the four-way valve 4 to the second state so as to communicate the connection port 4a and the connection port 4c and to communicate the connection port 4b and the connection port 4d. Further, the control device 9 opens the first control valve 7a and closes the second control valve 8a.

この状態のときに、例えばユーザが給湯器２０から給湯水Ｗ２の供給を受ける操作をした場合、図５に示すように給湯水管１１に給湯水Ｗ２が流通し、給湯機能付ヒートポンプ式空気調和機１は、給湯単独モードで動作する。 In this state, for example, when the user performs an operation of receiving the supply of hot water W2 from the hot water heater 20, the hot water W2 flows through the hot water pipe 11 as shown in FIG. 1 operates in a single hot water supply mode.

制御装置９から入力される制御信号に応じて圧縮機２が駆動を開始すると、圧縮機２で圧縮され高圧側２ｂから吐出された高温高圧の気体の冷媒Ｒｆは、第１給湯熱交換器３を流通する。
一方、給水栓２０ａから供給される給湯水Ｗ２は、第２給湯熱交換器７、給湯水管１１を経由した後、第１給湯熱交換器３を流通する。
そして、給湯水Ｗ２は第１給湯熱交換器３で、圧縮機２で圧縮された高温高圧の冷媒Ｒｆから顕熱と一部の潜熱を受け取って高温の給湯水Ｗ２になり、給湯器２０まで給湯水管１１を流通してユーザに供給される。 When the compressor 2 starts to be driven in response to a control signal input from the control device 9, the high-temperature and high-pressure gaseous refrigerant Rf compressed by the compressor 2 and discharged from the high-pressure side 2 b is converted into the first hot water supply heat exchanger 3. Circulate.
On the other hand, hot water W 2 supplied from the water tap 20 a passes through the second hot water supply heat exchanger 7 and the hot water supply pipe 11 and then flows through the first hot water supply heat exchanger 3.
The hot water W2 is a first hot water supply heat exchanger 3 that receives sensible heat and a part of latent heat from the high-temperature and high-pressure refrigerant Rf compressed by the compressor 2 to become high-temperature hot-water water W2. The hot water supply pipe 11 is distributed and supplied to the user.

一方、第１給湯熱交換器３で顕熱と一部の潜熱を給湯水Ｗ２に与えて温度が低下し、わずかな一部が凝縮した冷媒Ｒｆは、ほぼ気体の気液混合の状態で四方弁４の接続口４ｃから接続口４ａを経由して冷媒管１０を流通する。
第１制御バルブ７ａが開弁し第２制御バルブ８ａが閉弁していることから、冷媒Ｒｆは第２給湯熱交換器７を流通する。
そして、冷媒Ｒｆは、第２給湯熱交換器７を流通する給湯水Ｗ２と熱交換し、給湯水Ｗ２を加熱する。 On the other hand, the sensible heat and a part of latent heat are given to the hot water W2 by the first hot water supply heat exchanger 3 and the refrigerant Rf, which is partially condensed, is almost completely condensed in a gas-liquid mixed state. The refrigerant pipe 10 is circulated from the connection port 4c of the valve 4 via the connection port 4a.
Since the first control valve 7 a is opened and the second control valve 8 a is closed, the refrigerant Rf flows through the second hot water supply heat exchanger 7.
And the refrigerant | coolant Rf heat-exchanges with the hot water supply water W2 which distribute | circulates the 2nd hot water supply heat exchanger 7, and heats the hot water supply water W2.

第２給湯熱交換器７で給湯水Ｗ２と熱交換した冷媒Ｒｆは冷却されて凝縮して液化し、冷媒管１０を流通する。そして、膨張弁６で断熱膨張して減圧し、わずかな一部が気化して低温の気液混合の状態になる。
さらに、低温の冷媒Ｒｆは空気側熱交換器５で相対的に高温の外気と熱交換して気化する。
気化した冷媒Ｒｆは、四方弁４の接続口４ｄから接続口４ｂを経由して、低圧側２ａから圧縮機２に導入されて圧縮され、高温高圧の冷媒Ｒｆが高圧側２ｂから吐出される。 The refrigerant Rf heat-exchanged with the hot water W2 in the second hot water supply heat exchanger 7 is cooled, condensed and liquefied, and flows through the refrigerant pipe 10. And it expands adiabatically with the expansion valve 6 and depressurizes, and a small part is vaporized and it will be in the state of low-temperature gas-liquid mixing.
Further, the low-temperature refrigerant Rf is vaporized by exchanging heat with the relatively high-temperature outside air in the air-side heat exchanger 5.
The vaporized refrigerant Rf is introduced into the compressor 2 from the low-pressure side 2a via the connection port 4d of the four-way valve 4 and compressed, and the high-temperature and high-pressure refrigerant Rf is discharged from the high-pressure side 2b.

このように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、給湯単独モードで動作することが可能である。
給湯単独モードでは、圧縮機２で圧縮される高温高圧の冷媒Ｒｆの全てが、直列に配置される第１給湯熱交換器３及び第２給湯熱交換器７を流通して給湯水Ｗ２を加熱することから、給湯機能付ヒートポンプ式空気調和機１の熱交換能力のほぼ全てを給湯水Ｗ２の加熱に利用することができる。すなわち、給湯機能付ヒートポンプ式空気調和機１の熱交換能力のほぼ全てを給湯に利用できることになり、給湯能力を向上できる。 Thus, the heat pump type air conditioner 1 with a hot water supply function according to the present embodiment can operate in the hot water supply single mode.
In the hot water supply single mode, all of the high-temperature and high-pressure refrigerant Rf compressed by the compressor 2 flows through the first hot water supply heat exchanger 3 and the second hot water supply heat exchanger 7 arranged in series to heat the hot water supply water W2. Therefore, almost all of the heat exchange capacity of the heat pump type air conditioner 1 with a hot water supply function can be used for heating the hot water W2. That is, almost all of the heat exchange capability of the heat pump type air conditioner 1 with a hot water supply function can be used for hot water supply, and the hot water supply capability can be improved.

なお、空気側熱交換器５が冷媒Ｒｆの蒸発器として機能する場合（例えば、給湯機能付ヒートポンプ式空気調和機１が、暖房単独モード、暖房＋給湯モード、給湯単独モードのいずれかの動作モードで動作する場合）、空気側熱交換器５に霜が発生する場合がある。このような霜を除去するため、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、必要に応じて除霜運転をする構成が好適である。 In addition, when the air side heat exchanger 5 functions as an evaporator of the refrigerant Rf (for example, the heat pump type air conditioner 1 with a hot water supply function operates in any one of the heating single mode, the heating + hot water supply mode, and the hot water supply single mode. In some cases, frost may be generated in the air-side heat exchanger 5. In order to remove such frost, the heat pump air conditioner 1 with a hot water supply function according to the present embodiment is preferably configured to perform a defrosting operation as necessary.

次に、例えば、給湯機能付ヒートポンプ式空気調和機１が給湯単独モードで動作している場合の除霜運転について説明する。空気側熱交換器５に霜が発生したことを制御装置９が検出すると、制御装置９は、図６に示すように、四方弁４を第１状態に切り換えて接続口４ａと接続口４ｂを連通するとともに接続口４ｃと接続口４ｄを連通する。なお、制御装置９が、空気側熱交換器５に霜が発生したことを検出する方法は限定しない。例えば、制御装置９は、図示しない温度計が計測する外気温度に応じて冷媒Ｒｆの温度を推定し、推定した冷媒Ｒｆの温度が所定値以下となった場合に、空気側熱交換器５に霜が発生したと判定する方法とすればよい。 Next, for example, the defrosting operation when the heat pump type air conditioner 1 with a hot water supply function is operating in the hot water supply single mode will be described. When the control device 9 detects that frost has been generated in the air-side heat exchanger 5, the control device 9 switches the four-way valve 4 to the first state and connects the connection port 4a and the connection port 4b as shown in FIG. The connection port 4c and the connection port 4d are communicated with each other. In addition, the method in which the control apparatus 9 detects that frost generate | occur | produced in the air side heat exchanger 5 is not limited. For example, the control device 9 estimates the temperature of the refrigerant Rf according to the outside air temperature measured by a thermometer (not shown), and when the estimated temperature of the refrigerant Rf becomes a predetermined value or less, A method for determining that frost has occurred may be used.

圧縮機２で圧縮され高圧側２ｂから吐出された高温高圧の気体の冷媒Ｒｆは、第１給湯熱交換器３を流通する。
給水栓２０ａから供給される給湯水Ｗ２は、第２給湯熱交換器７、給湯水管１１を経由した後、第１給湯熱交換器３を流通する。
そして、給湯水Ｗ２は、圧縮機２で圧縮された高温高圧の冷媒Ｒｆから顕熱と一部の潜熱を第１給湯熱交換器３で受け取って高温の給湯水Ｗ２になり、給湯器２０まで給湯水管１１を流通してユーザに供給される。 The high-temperature and high-pressure gaseous refrigerant Rf compressed by the compressor 2 and discharged from the high-pressure side 2 b flows through the first hot water supply heat exchanger 3.
The hot water W2 supplied from the water tap 20a passes through the second hot water supply heat exchanger 7 and the hot water supply pipe 11, and then flows through the first hot water supply heat exchanger 3.
Then, the hot water W2 receives sensible heat and a part of latent heat from the high-temperature and high-pressure refrigerant Rf compressed by the compressor 2 by the first hot-water supply heat exchanger 3 to become high-temperature hot-water supply water W2. The hot water supply pipe 11 is distributed and supplied to the user.

一方、第１給湯熱交換器３で顕熱と一部の潜熱を給湯水Ｗ２に与えて温度が低下し、わずかな一部が凝縮した冷媒Ｒｆは、ほぼ気体の気液混合の状態で四方弁４の接続口４ｃから接続口４ｄを経由して冷媒管１０を流通する。
そして、高温高圧の冷媒Ｒｆは、空気側熱交換器５を流通するときに霜を解かし、且つ相対的に低温の外気によって冷却されて凝縮する。 On the other hand, the sensible heat and a part of latent heat are given to the hot water W2 by the first hot water supply heat exchanger 3 and the refrigerant Rf, which is partially condensed, is almost completely condensed in a gas-liquid mixed state. The refrigerant pipe 10 is circulated from the connection port 4c of the valve 4 via the connection port 4d.
The high-temperature and high-pressure refrigerant Rf defrosts when flowing through the air-side heat exchanger 5, and is cooled and condensed by relatively low-temperature outside air.

凝縮して液体になった冷媒Ｒｆは膨張弁６で断熱膨張して減圧し、わずかな一部が気化して低温の気液混合の状態になる。ほぼ液体の気液混合の状態になった冷媒Ｒｆは第２給湯熱交換器７を流通し、相対的に高温の給湯水Ｗ２と熱交換して気化し、四方弁４を経由して低圧側２ａから圧縮機２に導入されて圧縮される。 The refrigerant Rf that has condensed into a liquid is adiabatically expanded and decompressed by the expansion valve 6, and a small part thereof is vaporized to be in a low-temperature gas-liquid mixture state. The refrigerant Rf in a substantially liquid-gas mixed state flows through the second hot water supply heat exchanger 7 and is vaporized by exchanging heat with the relatively hot water supply water W2 and passing through the four-way valve 4 to the low pressure side. 2a is introduced into the compressor 2 and compressed.

このように、給湯機能付ヒートポンプ式空気調和機１を除霜運転すると、空気側熱交換器５に発生する霜を高温の冷媒Ｒｆで除去できる。
また、給湯水Ｗ２は、第２給湯熱交換器７では低温の冷媒Ｒｆで冷却されるが、第１給湯熱交換器３で高温の冷媒Ｒｆと熱交換して加熱されるため、給湯水Ｗ２の温度低下を抑制できる。
このように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、給湯単独モードで動作しているときに除霜運転しても給湯水Ｗ２の温度低下を抑制できる。 Thus, when the heat pump type air conditioner 1 with a hot water supply function is defrosted, frost generated in the air-side heat exchanger 5 can be removed by the high-temperature refrigerant Rf.
The hot water W2 is cooled by the low-temperature refrigerant Rf in the second hot water supply heat exchanger 7, but is heated by exchanging heat with the high-temperature refrigerant Rf in the first hot water supply heat exchanger 3, so the hot water W2 is supplied. Can be suppressed.
Thus, the heat pump type air conditioner 1 with a hot water supply function according to the present embodiment can suppress the temperature drop of the hot water W2 even if the defrosting operation is performed when operating in the hot water supply single mode.

また、除霜運転のとき、制御装置９が第２制御バルブ８ａを開弁する構成であってもよい。そして、水側熱交換器８に冷暖房用水Ｗ１（図１参照）が流通する構成とすれば、水側熱交換器８を蒸発器として機能させることができる。
この構成によって、膨張弁６で減圧された気液混合の状態の冷媒Ｒｆの一部は水側熱交換器８を流通することになり、第２給湯熱交換器７の冷媒Ｒｆの流通量を減らすことができる。したがって、第２給湯熱交換器７における給湯水Ｗ２の温度低下を抑制できる。 Moreover, the structure which opens the 2nd control valve 8a may be sufficient as the control apparatus 9 at the time of a defrost driving | operation. And if it is set as the structure by which the water W1 for cooling / heating (refer FIG. 1) distribute | circulates to the water side heat exchanger 8, the water side heat exchanger 8 can be functioned as an evaporator.
With this configuration, a part of the refrigerant Rf in the gas-liquid mixed state decompressed by the expansion valve 6 circulates in the water-side heat exchanger 8, and the circulation amount of the refrigerant Rf in the second hot water supply heat exchanger 7 is reduced. Can be reduced. Therefore, the temperature drop of the hot water W2 in the second hot water supply heat exchanger 7 can be suppressed.

なお、除霜運転のときには、水側熱交換器８を流通する冷暖房用水Ｗ１が冷暖房機３０を循環しない構成とすれば、冷却された冷暖房用水Ｗ１でユーザの居室（図示せず）が冷却されることを防止できる。 In the defrosting operation, if the cooling / heating water W1 flowing through the water-side heat exchanger 8 does not circulate through the cooling / heating machine 30, the user's room (not shown) is cooled by the cooled cooling / heating water W1. Can be prevented.

以上のように、図１に示す、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、１つの冷凍サイクルを備える構成で、冷房単独モード、冷房＋給湯モード、暖房単独モード、暖房＋給湯モード、及び給湯単独モードの各動作モードで動作することができる。そして、給湯機能付ヒートポンプ式空気調和機１が冷房単独モードで動作する場合、冷媒Ｒｆのほぼ全てを膨張弁６で低温低圧の液体にすることができ、さらに、冷媒Ｒｆのほぼ全てを水側熱交換器８で気化して冷暖房用水Ｗ１を冷却できる。すなわち、熱交換能力のほぼ全てを冷暖房用水Ｗ１を冷却に利用することができる。したがって、給湯機能付ヒートポンプ式空気調和機１の冷房能力を向上できるという優れた効果を奏する。 As described above, the heat pump air conditioner 1 with a hot water supply function according to the present embodiment shown in FIG. 1 is configured to include one refrigeration cycle, and has a cooling only mode, a cooling + hot water supply mode, a heating only mode, and a heating + It can operate in each operation mode of hot water supply mode and hot water supply single mode. When the heat pump type air conditioner 1 with a hot water supply function operates in the cooling only mode, almost all of the refrigerant Rf can be made into a low-temperature and low-pressure liquid by the expansion valve 6, and further, almost all of the refrigerant Rf is converted to the water side. The water W1 for cooling and heating can be cooled by being vaporized by the heat exchanger 8. That is, almost all of the heat exchange capacity can be used for cooling the cooling / heating water W1. Therefore, there is an excellent effect that the cooling capacity of the heat pump air conditioner 1 with a hot water supply function can be improved.

また、図２に示すように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１が冷房＋給湯モードで動作する場合、第１給湯熱交換器３では、冷媒Ｒｆの顕熱で給湯水Ｗ２を加熱できる。冷媒Ｒｆの顕熱は、空気側熱交換器５で排熱される熱量であることから、冷房＋給湯モードでは一部の排熱を給湯用に回収していることになり、給湯機能付ヒートポンプ式空気調和機１の省エネルギー化に寄与できるという優れた効果を奏する。 In addition, as shown in FIG. 2, when the heat pump type air conditioner 1 with a hot water supply function according to the present embodiment operates in the cooling + hot water supply mode, the first hot water supply heat exchanger 3 uses the sensible heat of the refrigerant Rf to supply hot water. W2 can be heated. Since the sensible heat of the refrigerant Rf is the amount of heat exhausted by the air-side heat exchanger 5, a part of the exhaust heat is recovered for hot water supply in the cooling and hot water supply mode. The outstanding effect that it can contribute to energy saving of the air conditioner 1 is produced.

また、図５に示すように、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１が給湯単独モードで動作する場合、圧縮機２で圧縮される高温の冷媒Ｒｆのほぼ全てを、直列に配置される第１給湯熱交換器３及び第２給湯熱交換器７に流通させて給湯水Ｗ２を加熱できる。したがって、給湯機能付ヒートポンプ式空気調和機１の熱交換能力のほぼ全てを給湯水Ｗ２の加熱に利用することができ、給湯能力を向上できるという優れた効果を奏する。
さらに、例えば空気側熱交換器５（図６参照）に霜が発生した場合であっても、本実施形態に係る給湯機能付ヒートポンプ式空気調和機１は、給湯水Ｗ２の温度低下を好適に抑制しながら除霜運転できるという優れた効果を奏する。 As shown in FIG. 5, when the heat pump type air conditioner 1 with a hot water supply function according to this embodiment operates in the hot water supply single mode, almost all of the high-temperature refrigerant Rf compressed by the compressor 2 is serially connected. The hot water supply water W2 can be heated by flowing through the first hot water supply heat exchanger 3 and the second hot water supply heat exchanger 7 arranged. Therefore, almost all of the heat exchange capacity of the heat pump type air conditioner 1 with a hot water supply function can be used for heating the hot water supply water W2, and an excellent effect of improving the hot water supply capacity is achieved.
Further, for example, even when frost is generated in the air-side heat exchanger 5 (see FIG. 6), the heat pump air conditioner 1 with a hot water supply function according to the present embodiment suitably reduces the temperature of the hot water W2. There is an excellent effect that the defrosting operation can be performed while suppressing.

なお、図１に示すように、本実施形態においては、冷暖房機３０（負荷）に供給される被熱交換体を水（冷暖房用水Ｗ１）とし、空調用熱交換器として水側熱交換器８を備える構成としたが、この構成に限定するものではない。
例えば、冷暖房機３０（負荷）に供給される被熱交換体をブラインとし、空調用熱交換器として、冷媒Ｒｆとブラインが熱交換する熱交換器を備える構成としてもよいし、被熱交換体を空気とし、空調用熱交換器として、冷媒Ｒｆと空気が熱交換する熱交換器を備える構成としてもよい。 As shown in FIG. 1, in the present embodiment, the heat exchanger to be supplied to the air conditioner 30 (load) is water (air conditioning water W1), and the water side heat exchanger 8 is used as an air conditioning heat exchanger. However, the present invention is not limited to this configuration.
For example, the heat exchanger to be supplied to the air conditioner 30 (load) may be a brine, and the heat exchanger for air conditioning may include a heat exchanger that exchanges heat between the refrigerant Rf and the brine. It is good also as a structure provided with the heat exchanger which heat-exchanges refrigerant | coolant Rf and air as an air-conditioning heat exchanger.

また、第２給湯熱交換器７及び水側熱交換器８の冷媒Ｒｆの流通を制御する熱交換器用弁機構として、開閉弁の第１制御バルブ７ａと、開閉弁の第２制御バルブ８ａとを備える構成としたが、第１制御バルブ７ａと第２制御バルブ８ａを、冷媒Ｒｆの流量調整が可能な流量調整弁としてもよい。 Further, as a heat exchanger valve mechanism for controlling the flow of the refrigerant Rf in the second hot water supply heat exchanger 7 and the water-side heat exchanger 8, an on-off valve first control valve 7a, an on-off valve second control valve 8a, However, the first control valve 7a and the second control valve 8a may be flow rate adjustment valves capable of adjusting the flow rate of the refrigerant Rf.

さらに、熱交換器用弁機構として、第２給湯熱交換器７と水側熱交換器８の何れか一方を選択して冷媒Ｒｆを流通させる三方弁を備える構成であってもよいし、第２給湯熱交換器７と水側熱交換器８の冷媒Ｒｆの流量比率を調整可能な三方弁を備える構成であってもよい。 Further, the heat exchanger valve mechanism may include a three-way valve that selects one of the second hot water supply heat exchanger 7 and the water-side heat exchanger 8 and distributes the refrigerant Rf. The structure provided with the three-way valve which can adjust the flow rate ratio of the refrigerant | coolant Rf of the hot water supply heat exchanger 7 and the water side heat exchanger 8 may be sufficient.

熱交換器用弁機構として、流量調整弁の第１制御バルブ７ａと第２制御バルブ８ａを備える場合、及び、第２給湯熱交換器７と水側熱交換器８の冷媒Ｒｆの流量比率を調整可能な三方弁を備える場合、例えば給湯機能付ヒートポンプ式空気調和機１が暖房＋給湯モードで動作するときに、第２給湯熱交換器７と水側熱交換器８に流通する冷媒Ｒｆの流量を細かく調整することができる。そして、給湯水Ｗ２（図２参照）の温度と、冷暖房用水Ｗ１の温度を細かく調整することができる。 When the first control valve 7a and the second control valve 8a are provided as the heat exchanger valve mechanism, the flow rate ratio of the refrigerant Rf in the second hot water heat exchanger 7 and the water-side heat exchanger 8 is adjusted. When a possible three-way valve is provided, for example, when the heat pump type air conditioner 1 with a hot water supply function operates in the heating + hot water supply mode, the flow rate of the refrigerant Rf flowing through the second hot water heat exchanger 7 and the water side heat exchanger 8 Can be finely adjusted. And the temperature of the hot water W2 (refer FIG. 2) and the temperature of the water W1 for air conditioning can be adjusted finely.

１給湯機能付ヒートポンプ式空気調和機
１ａ冷媒回路
２圧縮機
３第１給湯熱交換器（給湯熱交換器）
４四方弁（制御弁）
５空気側熱交換器
６膨張弁（膨張装置）
７第２給湯熱交換器（給湯熱交換器）
７ａ第１制御バルブ（制御弁、熱交換器用弁機構）
８水側熱交換器（空調用熱交換器）
８ａ第２制御バルブ（制御弁、熱交換器用弁機構）
１０冷媒管
１１給湯水管
２０ａ給水栓（給湯水の供給源）
３０冷暖房機（負荷）
Ｒｆ冷媒
Ｗ１冷暖房用水（被熱交換体）
Ｗ２給湯水 DESCRIPTION OF SYMBOLS 1 Heat pump type air conditioner with hot water supply function 1a Refrigerant circuit 2 Compressor 3 First hot water supply heat exchanger (hot water supply heat exchanger)
4 Four-way valve (control valve)
5 Air-side heat exchanger 6 Expansion valve (expansion device)
7 Second hot water supply heat exchanger (hot water supply heat exchanger)
7a First control valve (control valve, heat exchanger valve mechanism)
8 Water-side heat exchanger (heat exchanger for air conditioning)
8a Second control valve (control valve, heat exchanger valve mechanism)
10 Refrigerant pipe 11 Hot water supply pipe 20a Water tap (Supply source of hot water)
30 Air conditioner (load)
Rf Refrigerant W1 Water for cooling and heating (heat exchanger)
W2 hot water

Claims

A compressor that compresses the refrigerant; a heat exchanger that is supplied to a load; an air-conditioning heat exchanger that exchanges heat between the refrigerant; an air-side heat exchanger that exchanges heat between the outside air and the refrigerant; A refrigerant circuit in which a hot water supply heat exchanger that exchanges heat with the refrigerant, an expansion device that decompresses and expands the liquefied refrigerant, and a control valve that controls the flow of the refrigerant is connected by a refrigerant pipe through which the refrigerant flows. A heat pump air conditioner with a hot water supply function,
The hot water supply heat exchanger includes a first hot water supply heat exchanger to which the refrigerant compressed by the compressor is supplied, and a second hot water supply heat exchanger disposed in series with the first hot water supply heat exchanger. A hot water supply pipe through which the hot water is circulated from the hot water supply source through the second hot water heat exchanger to the first hot water heat exchanger,
The air conditioning heat exchanger is disposed in parallel with the second hot water supply heat exchanger,
The control valve controls the flow of the refrigerant in the four-way valve that switches the flow path of the refrigerant after flowing through the first hot water supply heat exchanger, the second hot water supply heat exchanger, and the air conditioner heat exchanger. and the heat exchanger valve mechanism, only including,
The four-way valve includes a first state in which the first hot water supply heat exchanger is connected to the air-side heat exchanger, a second state in which the first hot water supply heat exchanger is connected to the second hot water supply heat exchanger, A heat pump air conditioner with a hot water supply function, wherein the air conditioner is arranged so as to be switched .

The heat exchanger valve mechanism includes: a first control valve that controls the flow of the refrigerant in the second hot water supply heat exchanger; and a second control valve that controls the flow of the refrigerant in the heat exchanger for air conditioning. The heat pump type air conditioner with a hot water supply function according to claim 1, comprising:

3. The heat pump air conditioner with a hot water supply function according to claim 1, wherein the first hot water supply heat exchanger is provided in a flow path of the refrigerant from the compressor toward the four-way valve.