JP2009168298A

JP2009168298A - Heat pump type water heater

Info

Publication number: JP2009168298A
Application number: JP2008005107A
Authority: JP
Inventors: Suekichi Nishimura; 末吉西村; Masanori Higuchi; 正紀樋口; Michio Nakagawa; 道夫中川
Original assignee: Denso Corp; Corona Corp
Current assignee: Denso Corp; Corona Corp
Priority date: 2008-01-14
Filing date: 2008-01-14
Publication date: 2009-07-30

Abstract

<P>PROBLEM TO BE SOLVED: To improve working efficiency in pipe connection for connecting a water-refrigerant heat exchanger in a heat pump housing to a hot water storage tank in a tank housing. <P>SOLUTION: A first outflow connecting end portion 26a of a first outflow pipe 26 for allowing the supplied hot water/water from the water-refrigerant heat exchanger 22 received in the heat pump housing 2 to flow out, a first outflow connecting end portion 27a of a first inflow pipe 27 for allowing the supplied hot water/water to flow into the water-refrigerant heat exchanger 22, a second outflow connecting end portion 32a of a second outflow pipe 32 for allowing the supplied hot water/water from the hot water storage tank 31 received in the tank housing 3 to flow out, and a second inflow connecting end portion 33a of a second inflow pipe 33 for allowing the supplied hot water/water to flow into the hot water storage tank 31 are formed in parallel with each other. Thus the connecting end portions of the first outflow connecting end portion 26a and the second inflow connecting end portion 33a, and the connecting end portions of the first inflow connecting end portion 27a and the second outflow connecting end portion 32a can be connected from the same direction by U-shaped connecting pipes 61, 62. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、給湯水を加熱するヒートポンプサイクルが収容されたヒートポンプ筐体と、給湯水を貯湯する貯湯タンクが収容されたタンク筐体とを備えるヒートポンプ式給湯機に関する。 The present invention relates to a heat pump type hot water heater including a heat pump housing in which a heat pump cycle for heating hot water is accommodated and a tank housing in which a hot water storage tank for storing hot water is accommodated.

従来、給湯水を加熱するヒートポンプサイクルが収容されたヒートポンプ筐体と、給湯水を貯湯する貯湯タンクが収容されたタンク筐体とを備えるヒートポンプ式給湯機が知られている。例えば、特許文献１には、ヒートポンプ筐体およびタンク筐体をそれぞれ異なる場所に設置することで、その設置作業性を向上させたヒートポンプ式給湯機が開示されている。 2. Description of the Related Art Conventionally, there is known a heat pump type hot water heater that includes a heat pump housing that houses a heat pump cycle that heats hot water and a tank housing that houses a hot water storage tank that stores hot water. For example, Patent Document 1 discloses a heat pump type hot water heater in which the installation workability is improved by installing a heat pump housing and a tank housing in different places.

また、この特許文献１のヒートポンプ式給湯機に対して、ヒートポンプ筐体およびタンク筐体を水平方向に隣接配置して一体化させたヒートポンプ式給湯機についても、ヒートポンプ筐体内の水−冷媒熱交換器とタンク筐体内の貯湯タンクとを接続する接続配管を地中に埋設する埋設作業が不要となる等のメリットを有しており、そのニーズは高い。
特開２００６−３０８２８２号公報 In addition, with respect to the heat pump water heater of Patent Document 1, a heat-pump water heater in which a heat pump housing and a tank housing are arranged adjacent to each other in the horizontal direction and integrated is also used for water-refrigerant heat exchange in the heat pump housing. There is a merit that there is no need to embed a connecting pipe that connects the vessel and the hot water storage tank in the tank case in the ground, and the needs are high.
JP 2006-308282 A

ところが、ヒートポンプ筐体およびタンク筐体を水平方向に隣接配置して一体化させたヒートポンプ式給湯機では、上述の埋設作業が不要となるものの、ヒートポンプサイクル構成機器が収容されたヒートポンプ筐体内部あるいは貯湯タンクが収容されたタンク筐体内部の狭い空間内で接続配管を接続しなければならない。 However, in the heat pump water heater in which the heat pump casing and the tank casing are arranged adjacent to each other in the horizontal direction and integrated, the above-described embedding work is not required, but the inside of the heat pump casing in which the heat pump cycle components are accommodated or The connecting piping must be connected in a narrow space inside the tank housing in which the hot water storage tank is accommodated.

さらに、例えば、家庭用のヒートポンプ式給湯機では、ヒートポンプ式給湯機を設置する家屋の壁面と隣接する家屋の壁面が近接していることが多く、ヒートポンプ筐体およびタンク筐体を狭い設置場所に搬送した後に、接続配管を接続する作業者自身の作業スペースを確保することも難しい。 Furthermore, for example, in a household heat pump water heater, the wall surface of the house where the heat pump water heater is installed is often close to the wall surface of the adjacent house, and the heat pump housing and tank housing are placed in a narrow installation location. It is also difficult to secure the work space of the worker himself / herself who connects the connection pipe after transporting.

このため、ヒートポンプ筐体およびタンク筐体を水平方向に隣接配置して一体化させたヒートポンプ式給湯機では、特許文献１のヒートポンプ式給湯機に対して、配管接続時の作業性が悪いという問題がある。 For this reason, in the heat pump type hot water heater in which the heat pump casing and the tank casing are arranged adjacently in the horizontal direction and integrated, the workability at the time of pipe connection is poor with respect to the heat pump type hot water heater of Patent Document 1. There is.

本発明は、上記点に鑑み、ヒートポンプ筐体およびタンク筐体を水平方向に隣接配置して一体化させたヒートポンプ式給湯機において、水−冷媒熱交換器と貯湯タンクとを接続する配管接続時の作業性を向上させることを目的とする。 In view of the above points, the present invention provides a heat pump water heater in which a heat pump casing and a tank casing are arranged adjacently in the horizontal direction and integrated, and when connecting a pipe connecting a water-refrigerant heat exchanger and a hot water storage tank. The purpose is to improve the workability.

上記目的を達成するため、請求項１に記載の発明では、給湯水を加熱するヒートポンプサイクル（２０）の水−冷媒熱交換器（２２）が収容されたヒートポンプ筐体（２）と、給湯水を貯湯する貯湯タンク（３１）が収容されたタンク筐体（３）とを備え、ヒートポンプ筐体（２）およびタンク筐体（３）を水平方向に隣接配置して一体化させたヒートポンプ式給湯機であって、
水−冷媒熱交換器（２２）には、水−冷媒熱交換器（２２）から給湯水を流出させる第１流出配管（２６）、および、水−冷媒熱交換器（２２）へ給湯水を流入させる第１流入配管（２７）が接続されており、貯湯タンク（３１）には、貯湯タンク（３１）から給湯水を流出させる第２流出配管（３２）、および、貯湯タンク（３１）へ給湯水を流入させる第２流入配管（３３）が接続されており、第１流出配管（２６）および第２流入配管（３３）は、それぞれ互いに接続される第１流出接続端部（２６ａ）および第２流入接続端部（３３ａ）を有し、第１流入配管（２７）および第２流出配管（３２）は、それぞれ互いに接続される第１流入接続端部（２７ａ）および第２流出接続端部（３２ａ）を有し、
第１流出接続端部（２６ａ）および第２流入接続端部（３３ａ）の接続端部同士、並びに、第１流入接続端部（２７ａ）および第２流出接続端部（３２ａ）の接続端部同士のうち、少なくとも一方の接続端部同士は、互いに平行な方向に延びるように形成されるとともに、Ｕ字状の接続配管（６１、６２）で接続されていることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, a heat pump housing (2) in which a water-refrigerant heat exchanger (22) of a heat pump cycle (20) for heating hot water is accommodated, and hot water And a tank housing (3) in which a hot water storage tank (31) for storing hot water is housed, and the heat pump housing (2) and the tank housing (3) are arranged adjacent to each other in the horizontal direction and integrated. Machine,
The water-refrigerant heat exchanger (22) has a first outflow pipe (26) for flowing hot water from the water-refrigerant heat exchanger (22) and hot water to the water-refrigerant heat exchanger (22). A first inflow pipe (27) for inflow is connected, and the hot water storage tank (31) is connected to a second outflow pipe (32) for flowing hot water from the hot water storage tank (31) and to the hot water storage tank (31). A second inflow pipe (33) through which hot water is introduced is connected, and the first outflow pipe (26) and the second inflow pipe (33) are connected to each other by a first outflow connection end (26a) and The first inflow pipe (27) and the second outflow pipe (32) have a second inflow connection end (33a), and the first inflow connection end (27a) and the second outflow connection end are connected to each other. Part (32a),
The connection ends of the first outflow connection end (26a) and the second inflow connection end (33a), and the connection ends of the first inflow connection end (27a) and the second outflow connection end (32a) Among them, at least one of the connection end portions is formed to extend in a direction parallel to each other, and is connected by a U-shaped connection pipe (61, 62).

これによれば、第１流出接続端部（２６ａ）および第２流入接続端部（３３ａ）の接続端部同士、あるいは、第１流入接続端部（２７ａ）および第２流出接続端部（３２ａ）の接続端部同士を、Ｕ字状の接続配管（６１、６２）で接続しているので、双方の接続端部にＵ字状の接続配管（６１、６２）を接続する作業を同一の方向から行うことができる。 According to this, the connection ends of the first outflow connection end (26a) and the second inflow connection end (33a), or the first inflow connection end (27a) and the second outflow connection end (32a). ) Are connected by U-shaped connection pipes (61, 62), and the same operation is performed to connect the U-shaped connection pipes (61, 62) to both connection ends. Can be done from the direction.

従って、接続配管を接続する作業者自身の作業スペースを確保することが難しい場合であっても、作業者が作業方向や作業位置を不必要に変化させることなく、接続端部同士を接続できる。 Therefore, even if it is difficult to secure the work space of the worker himself / herself who connects the connection pipe, the worker can connect the connection end portions without unnecessarily changing the work direction and the work position.

さらに、ヒートポンプ筐体（２）およびタンク筐体（３）の製造誤差や、組付設置時の組付誤差によって、接続端部同士の位置が多少ずれていたとしても、接続端部同士が互いに平行に延びるように形成されているので、各配管（２６〜３３）および接続端部（２６ａ〜３３ａ）を若干撓ませることで、容易に接続端部同士を接続することができる。 Furthermore, even if the positions of the connection ends are slightly deviated due to manufacturing errors of the heat pump casing (2) and the tank casing (3) or due to assembly errors during installation, the connection ends are not connected to each other. Since it is formed so as to extend in parallel, the connection ends can be easily connected to each other by slightly bending the pipes (26 to 33) and the connection ends (26a to 33a).

その結果、ヒートポンプ筐体（２）内の水−冷媒熱交換器（２２）とタンク筐体（３）内の貯湯タンク（３１）とを接続する配管接続時の作業性を向上させることができる。 As a result, it is possible to improve workability at the time of pipe connection for connecting the water-refrigerant heat exchanger (22) in the heat pump casing (2) and the hot water storage tank (31) in the tank casing (3). .

請求項２に記載の発明では、請求項１に記載のヒートポンプ式給湯機において、第１流出接続端部（２６ａ）、第１流入接続端部（２７ａ）、第２流出接続端部（３２ａ）および第２流入接続端部（３３ａ）は、いずれも互いに平行な方向に延びるように形成されていることを特徴とする。 According to a second aspect of the present invention, in the heat pump type water heater according to the first aspect, the first outflow connection end (26a), the first inflow connection end (27a), and the second outflow connection end (32a). The second inflow connection end portion (33a) is formed so as to extend in directions parallel to each other.

これによれば、第１流出接続端部（２６ａ）および第２流入接続端部（３３ａ）の接続端部同士、並びに、第１流入接続端部（２７ａ）および第２流出接続端部（３２ａ）の接続端部同士をＵ字状の接続配管（６１、６２）で接続する接続作業を、全て同一の方向から行うことができる。その結果、配管接続時の作業性を、より一層、向上させることができる。 According to this, the connection ends of the first outflow connection end (26a) and the second inflow connection end (33a), as well as the first inflow connection end (27a) and the second outflow connection end (32a). ) Can be performed from the same direction by connecting the connection ends of each other with U-shaped connection pipes (61, 62). As a result, workability at the time of pipe connection can be further improved.

請求項３に記載の発明では、請求項２に記載のヒートポンプ式給湯機において、第１流出接続端部（２６ａ）、第１流入接続端部（２７ａ）、第２流出接続端部（３２ａ）および第２流入接続端部（３３ａ）は、いずれもヒートポンプ筐体（２）とタンク筐体（３）との接触面に垂直な方向に延びるように形成されていることを特徴とする。 According to a third aspect of the present invention, in the heat pump type water heater according to the second aspect, the first outflow connection end (26a), the first inflow connection end (27a), and the second outflow connection end (32a). Each of the second inflow connection end (33a) is formed to extend in a direction perpendicular to the contact surface between the heat pump casing (2) and the tank casing (3).

これによれば、第１流出接続端部（２６ａ）、第１流入接続端部（２７ａ）、第２流出接続端部（３２ａ）および第２流入接続端部（３３ａ）が、ヒートポンプ筐体（２）とタンク筐体（３）との隣接する方向に延びることになるので、ヒートポンプ式給湯機全体としての接触面に平行な方向の奥行寸法を抑制できる。 According to this, the 1st outflow connection end part (26a), the 1st inflow connection end part (27a), the 2nd outflow connection end part (32a), and the 2nd inflow connection end part (33a) are heat pump cases ( Since it extends in the direction in which 2) and the tank housing (3) are adjacent, the depth dimension in the direction parallel to the contact surface of the heat pump hot water heater as a whole can be suppressed.

その結果、接続配管を接続する作業者自身の作業スペースを確保しやすくなり、配管接続時の作業性を、より一層、向上させることができる。 As a result, it becomes easy to secure the work space of the operator himself / herself who connects the connection pipe, and the workability at the time of pipe connection can be further improved.

請求項４に記載の発明のように、請求項１ないし３のいずれか１つに記載のヒートポンプ式給湯機において、第１流出接続端部（２６ａ）および第２流入接続端部（３３ａ）の接続端部同士、並びに、第１流入接続端部（２７ａ）および第２流出接続端部（３２ａ）の接続端部同士は、ヒートポンプ筐体（２）内部で接続されており、ヒートポンプ筐体（２）には、接続作業用の開口部（２ａ）が設けられていてもよい。 As in the invention according to claim 4, in the heat pump type water heater according to any one of claims 1 to 3, the first outflow connection end (26a) and the second inflow connection end (33a) The connection ends, and the connection ends of the first inflow connection end (27a) and the second outflow connection end (32a) are connected inside the heat pump casing (2), and the heat pump casing ( 2) may be provided with an opening (2a) for connection work.

ところで、ヒートポンプ筐体（２）の内部は、ヒートポンプサイクル（２０）を構成する複数の構成機器の間に、接続端部同士を接続するための空間を確保しやすい。つまり、ヒートポンプ筐体（２）の内部は、タンク筐体（３）の内部に対して、接続端部同士を接続するための空間を確保しやすい。 By the way, the inside of the heat pump housing (2) can easily secure a space for connecting the connection end portions among a plurality of components constituting the heat pump cycle (20). That is, the inside of the heat pump housing (2) can easily secure a space for connecting the connection ends to the inside of the tank housing (3).

従って、接続端部同士をヒートポンプ筐体（２）内部で接続することによって、接続端部同士をタンク筐体（３）内部で接続する場合に対して、水−冷媒熱交換器（２２）と貯湯タンク（３１）とを接続する際の作業性を向上させることができる。 Therefore, by connecting the connection ends to each other inside the heat pump casing (2), the water-refrigerant heat exchanger (22) and the connection ends are connected to each other inside the tank casing (3). The workability at the time of connecting the hot water storage tank (31) can be improved.

請求項５に記載の発明では、請求項４に記載のヒートポンプ式給湯機において、開口部（２ａ）は、ヒートポンプ筐体（２）の側面に設けられていることを特徴とする。これによれば、接続作業時に開口部（２ａ）からヒートポンプ筐体（２）内部に雨水等が侵入することを抑制できる。 According to a fifth aspect of the present invention, in the heat pump water heater according to the fourth aspect, the opening (2a) is provided on a side surface of the heat pump casing (2). According to this, it can suppress that rainwater etc. penetrate | invade into a heat pump housing | casing (2) inside from an opening part (2a) at the time of a connection operation | work.

なお、この欄および特許請求の範囲で記載した各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。 In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

図１〜３により、本発明の一実施形態を説明する。図１は、本実施形態の家庭用のヒートポンプ式給湯機１の模式的な全体構成図である。なお、各図における上下の各矢印は、ヒートポンプ式給湯機１を設置面Ｇに設置した状態における各方向を示している。 An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic overall configuration diagram of a household heat pump water heater 1 according to the present embodiment. In addition, each up-and-down arrow in each figure has shown each direction in the state which installed the heat pump type water heater 1 in the installation surface G.

ヒートポンプ式給湯機１は、図１に示すように、ヒートポンプ筐体２、および、このヒートポンプ筐体２とは別体に構成されたタンク筐体３を水平方向に隣接配置して一体化させたものである。ヒートポンプ筐体２およびタンク筐体３は、ヒートポンプ式給湯機１の外殻を形成するもので、耐食性に優れる金属（例えば、ステンレス）によって、上下方向に長手方向を有する略直方体状に形成されている。 As shown in FIG. 1, the heat pump type hot water heater 1 has a heat pump casing 2 and a tank casing 3 configured separately from the heat pump casing 2 arranged adjacent to each other in the horizontal direction and integrated. Is. The heat pump casing 2 and the tank casing 3 form an outer shell of the heat pump hot water heater 1 and are formed in a substantially rectangular parallelepiped shape having a longitudinal direction in the vertical direction by a metal (for example, stainless steel) having excellent corrosion resistance. Yes.

ヒートポンプ筐体２は、給湯水を加熱するヒートポンプサイクル２０を収容するものである。ヒートポンプサイクル２０は、圧縮機２１、水−冷媒熱交換器２２、電気式膨張弁２３、蒸発器２４等を順次配管接続して構成される周知の蒸気圧縮式の冷凍サイクルである。さらに、このヒートポンプサイクル２０では、冷媒として二酸化炭素を採用しており、高圧側冷媒圧力が冷媒の臨界圧力以上となる超臨界冷凍サイクルを構成している。 The heat pump housing 2 houses a heat pump cycle 20 that heats hot water. The heat pump cycle 20 is a well-known vapor compression refrigeration cycle configured by sequentially connecting a compressor 21, a water-refrigerant heat exchanger 22, an electric expansion valve 23, an evaporator 24, and the like. Further, the heat pump cycle 20 employs carbon dioxide as a refrigerant, and constitutes a supercritical refrigeration cycle in which the high-pressure side refrigerant pressure is equal to or higher than the critical pressure of the refrigerant.

圧縮機２１は、ヒートポンプサイクル２０において、冷媒を吸入し、冷媒を臨界圧力以上となるまで圧縮して吐出するもので、本実施形態では、圧縮機構部２１ａを電動モータ２１ｂにより駆動する電動圧縮機を採用している。 The compressor 21 sucks the refrigerant in the heat pump cycle 20 and compresses and discharges the refrigerant until the pressure becomes equal to or higher than the critical pressure. In the present embodiment, the electric compressor 21 drives the compression mechanism portion 21a by the electric motor 21b. Is adopted.

水−冷媒熱交換器２２は、冷媒通路２２ａを通過する圧縮機２１吐出冷媒と水通路２２ｂを通過する給湯水とを熱交換させるもので、圧縮機２１から吐出された高温高圧冷媒の有する熱量を給湯水に放熱させることで、給湯水を加熱する加熱用熱交換器である。 The water-refrigerant heat exchanger 22 exchanges heat between the refrigerant discharged from the compressor 21 that passes through the refrigerant passage 22a and hot water that passes through the water passage 22b, and the amount of heat that the high-temperature and high-pressure refrigerant discharged from the compressor 21 has. It is a heat exchanger for heating which heats hot-water supply by dissipating heat to hot-water supply.

また、水−冷媒熱交換器２２の水通路２２ｂの出口側には、水−冷媒熱交換器２２から給湯水を流出させる第１流出配管２６が接続され、水通路２２ｂの入口側には、水−冷媒熱交換器２２へ給湯水を流入させる第１流入配管２７が接続されている。さらに、第１流入配管２７には、後述する貯湯タンク３１に貯湯された給湯水を水−冷媒熱交換器２２へ圧送する電動式の水ポンプ２５が配置されている。 In addition, a first outflow pipe 26 for discharging hot water from the water-refrigerant heat exchanger 22 is connected to the outlet side of the water passage 22b of the water-refrigerant heat exchanger 22, and the inlet side of the water passage 22b is connected to the outlet side of the water passage 22b. A first inflow pipe 27 that allows hot water to flow into the water-refrigerant heat exchanger 22 is connected. Furthermore, an electric water pump 25 that pumps hot water stored in a hot water storage tank 31 described later to the water-refrigerant heat exchanger 22 is disposed in the first inflow pipe 27.

電気式膨張弁２３は、電気的に絞り開度を調整することで水−冷媒熱交換器２２の冷媒通路２２ａから流出した高圧冷媒を減圧膨張させる減圧手段であるとともに、圧縮機２１の吐出口から電気式膨張弁２３の入口へ至る冷媒の高圧側冷媒圧力を制御する圧力制御手段でもある。 The electric expansion valve 23 is a decompression means for decompressing and expanding the high-pressure refrigerant flowing out from the refrigerant passage 22a of the water-refrigerant heat exchanger 22 by electrically adjusting the throttle opening, and the discharge port of the compressor 21 It is also a pressure control means for controlling the high-pressure side refrigerant pressure of the refrigerant from to the inlet of the electric expansion valve 23.

蒸発器２４は、電気式膨張弁２３にて減圧膨張された低圧冷媒と電動送風ファン２４ａにより送風された外気（室外空気）とを熱交換させて、低圧冷媒を蒸発させて吸熱作用を発揮させる吸熱用熱交換器である。 The evaporator 24 exchanges heat between the low-pressure refrigerant decompressed and expanded by the electric expansion valve 23 and the outside air (outdoor air) blown by the electric blower fan 24a, thereby evaporating the low-pressure refrigerant and exerting an endothermic effect. This is an endothermic heat exchanger.

なお、圧縮機２１の電動モータ２１ｂ、電気式膨張弁２３、蒸発器２４の電動送風ファン２４ａおよび水ポンプ２５は、図示しない制御装置の出力側に接続されており、この制御装置から出力される制御信号によってその作動が制御される。 The electric motor 21b of the compressor 21, the electric expansion valve 23, the electric blower fan 24a of the evaporator 24, and the water pump 25 are connected to the output side of a control device (not shown) and output from this control device. The operation is controlled by a control signal.

制御装置は、ＣＰＵ、ＲＯＭおよびＲＡＭ等を含む周知のマイクロコンピュータとその周辺回路から構成され、そのＲＯＭ内に記憶された制御プログラムに基づいて各種演算、処理を行い、上述の各種電気式アクチュエータ２１ｂ、２３、２４ａ、２５の作動を制御する。 The control device is composed of a well-known microcomputer including a CPU, ROM, RAM and the like and its peripheral circuits, performs various calculations and processing based on a control program stored in the ROM, and performs the various electric actuators 21b described above. , 23, 24a, 25 are controlled.

また、制御装置の入力側には、水−冷媒熱交換器２２の水通路２２ｂ入口側給湯水温度を検出する温度センサ等の各種センサ群、および、各種操作スイッチが設けられた操作パネル（いずれも図示せず。）が接続されている。 Further, on the input side of the control device, an operation panel provided with various sensor groups such as a temperature sensor for detecting the temperature of the hot water supply water on the inlet side of the water passage 22b of the water-refrigerant heat exchanger 22 and various operation switches (whichever Is not shown.) Is connected.

さらに、ヒートポンプ筐体２は、その底面側にヒートポンプ筐体２を支持するヒートポンプベース４を有しており、このヒートポンプベース４を介して設置面Ｇに設置（固定）されている。 Furthermore, the heat pump housing 2 has a heat pump base 4 that supports the heat pump housing 2 on the bottom surface side, and is installed (fixed) on the installation surface G via the heat pump base 4.

より具体的には、ヒートポンプベース４は、ヒートポンプ筐体２と同じ材料で形成され、底面部とその外枠を形成する側面部を有して皿状に構成された基盤部材である。さらに、ヒートポンプベース４は、その底面から設置面Ｇに向かって延びるように形成された複数の脚部４ａを有しており、ヒートポンプ筐体２は、この脚部４ａを介して設置面Ｇに設置（固定）されている。 More specifically, the heat pump base 4 is a base member that is formed of the same material as the heat pump housing 2 and has a bottom surface portion and a side surface portion that forms an outer frame thereof, and is configured in a dish shape. Furthermore, the heat pump base 4 has a plurality of legs 4a formed so as to extend from the bottom surface toward the installation surface G, and the heat pump housing 2 is placed on the installation surface G via the legs 4a. It is installed (fixed).

タンク筐体３は、給湯水を貯湯する貯湯タンク３１等を収容するものである。貯湯タンク３１は、耐食性に優れた金属（例えば、ステンレス）製で、断熱構造を有し、高温の給湯水を長時間保温することができる温水タンクである。また、その貯湯量は、３００〜４００リットル程度である。 The tank housing 3 accommodates a hot water storage tank 31 that stores hot water. The hot water storage tank 31 is a hot water tank that is made of a metal (for example, stainless steel) having excellent corrosion resistance, has a heat insulating structure, and can retain hot hot water for a long time. Moreover, the amount of hot water storage is about 300-400 liters.

貯湯タンク３１に貯留された給湯水は、貯湯タンク３１の上部に設けられた出湯口３１ａから出湯され、図示しない温調弁により水道からの冷水と混合されて温度調節された後、台所や風呂等に給湯される。また、貯湯タンク３１の底部には、給水口３１ｂが設けられ、この給水口３１ｂから水道水が給水される。 Hot water stored in the hot water storage tank 31 is discharged from a hot water outlet 31a provided in the upper part of the hot water storage tank 31, mixed with cold water from the water by a temperature control valve (not shown), and then adjusted to the temperature of the kitchen or bath. Hot water is supplied. Further, a water supply port 31b is provided at the bottom of the hot water storage tank 31, and tap water is supplied from the water supply port 31b.

さらに、貯湯タンク３１の底部には、水−冷媒熱交換器２２側へ給湯水を流出させる給湯水出口３１ｃが設けられ、給湯水出口３１ｃには、貯湯タンク３１から給湯水を流出させる第２流出配管３２が接続されている。 Furthermore, a hot water outlet 31c for allowing hot water to flow out to the water-refrigerant heat exchanger 22 side is provided at the bottom of the hot water storage tank 31, and the hot water outlet 31c allows second hot water to flow out from the hot water storage tank 31. An outflow pipe 32 is connected.

また、貯湯タンク３１の上部には、水−冷媒熱交換器２２の水通路２２ｂ出口側から流出した給湯水を流入させる給湯水入口３１ｄが設けられ、給湯水入口３１ｄには、貯湯タンク３１へ給湯水を流入させる第２流入配管３３が接続されている。 In addition, a hot water supply inlet 31d through which hot water flowing out from the outlet side of the water passage 22b of the water-refrigerant heat exchanger 22 flows is provided at the upper part of the hot water storage tank 31, and the hot water supply inlet 31d is connected to the hot water storage tank 31. A second inflow pipe 33 through which hot water is introduced is connected.

そして、第２流出配管３２および第２流入配管３３は、それぞれ水−冷媒熱交換器２２に接続された第１流入配管２７および第１流出配管２６に接続されている。これにより、貯湯タンク３１→第２流出配管３２→第１流入配管２７（水ポンプ２５）→水−冷媒熱交換器２２→第１流出配管２６→第２流入配管３３→貯湯タンク３１の順で給湯水が循環する水回路３０が構成されている。 The second outlet pipe 32 and the second inlet pipe 33 are connected to a first inlet pipe 27 and a first outlet pipe 26 that are connected to the water-refrigerant heat exchanger 22, respectively. Accordingly, the hot water storage tank 31 → the second outflow pipe 32 → the first inflow pipe 27 (water pump 25) → the water-refrigerant heat exchanger 22 → the first outflow pipe 26 → the second inflow pipe 33 → the hot water storage tank 31 in this order. A water circuit 30 in which hot water is circulated is configured.

さらに、タンク筐体３は、ヒートポンプ筐体２と同様に、その底面側にタンク筐体３を支持するタンクベース５を有しており、このタンクベース５を介して、設置面Ｇに設置（固定）されている。 Further, like the heat pump housing 2, the tank housing 3 has a tank base 5 that supports the tank housing 3 on the bottom surface side, and is installed on the installation surface G via the tank base 5 ( Fixed).

より具体的には、タンクベース５は、タンク筐体３と同じ材料で形成され、底面部とその外枠を形成する側面部を有して皿状に構成された基盤部材である。さらに、タンクベース５は、その底面から設置面Ｇに向かって延びるように形成された複数の脚部５ａ、５ｂを有しており、タンク筐体３は、この脚部５ａを介して設置面Ｇに設置（固定）されている。 More specifically, the tank base 5 is a base member that is formed of the same material as the tank housing 3 and has a bottom surface portion and a side surface portion that forms an outer frame thereof, and is configured in a dish shape. Furthermore, the tank base 5 has a plurality of legs 5a and 5b formed so as to extend from the bottom surface toward the installation surface G, and the tank housing 3 is installed on the installation surface via the legs 5a. It is installed (fixed) in G.

また、図１に示すように、タンクベース５に設けられた脚部のうち、少なくとも１つは、ヒートポンプベース４およびタンクベース５を組み付けた際に、ヒートポンプベース４下側空間に突き出した突出形状脚部５ｂになっている。 Further, as shown in FIG. 1, at least one of the legs provided on the tank base 5 has a protruding shape that protrudes into the space below the heat pump base 4 when the heat pump base 4 and the tank base 5 are assembled. It is a leg 5b.

ここで、図２により、第２流出配管３２と第１流入配管２７との接続構造および第１流出配管２６と第２流入配管３３との接続構造の詳細について説明する。図２（ａ）は、ヒートポンプ式給湯機１内部において、主に上述の水回路３０を構成する構成機器の実態的な配置態様を示す断面図であり、図２（ｂ）は、図２（ａ）のＡ−Ａ断面図である。 Here, the connection structure between the second outflow pipe 32 and the first inflow pipe 27 and the connection structure between the first outflow pipe 26 and the second inflow pipe 33 will be described in detail with reference to FIG. FIG. 2A is a cross-sectional view showing a practical arrangement mode of components constituting the water circuit 30 mainly in the heat pump type hot water heater 1, and FIG. It is AA sectional drawing of a).

図２に示すように、各配管２６、２７、３２、３３は、それぞれヒートポンプ筐体２およびタンク筐体３の内部で他の構成部品と干渉しないように折れ曲がるとともに、ヒートポンプ筐体２内部で直線上に延びるように形成された接続端部２６ａ、２７ａ、３２ａ、３３ａを有している。 As shown in FIG. 2, each of the pipes 26, 27, 32, and 33 is bent so as not to interfere with other components inside the heat pump casing 2 and the tank casing 3, and is straight within the heat pump casing 2. It has connection ends 26a, 27a, 32a, 33a formed so as to extend upward.

これらの各接続端部２６ａ〜３３ａの先端部には、それぞれ接続端部の外周側に円板状に広がるフランジ部が設けられている。そして、第１流出接続端部２６ａおよび第２流入接続端部３３ａの接続端部同士、並びに、第１流入接続端部２７ａおよび第２流出接続端部３２ａの接続端部同士は、互いに平行な方向に延びるように形成されている。 At the tip end portions of the connection end portions 26a to 33a, flange portions that spread in a disk shape are provided on the outer peripheral side of the connection end portions. The connection end portions of the first outflow connection end portion 26a and the second inflow connection end portion 33a and the connection end portions of the first inflow connection end portion 27a and the second outflow connection end portion 32a are parallel to each other. It is formed to extend in the direction.

より具体的には、第１流出接続端部２６ａ、第１流入接続端部２７ａ、第２流出接続端部３２ａおよび第２流入接続端部３３ａは、いずれも互いに平行、かつ、いずれもヒートポンプ筐体２とタンク筐体３とを一体化させる際の接触面に垂直な方向、すなわち、ヒートポンプ筐体２とタンク筐体３との隣接する方向（図１、２では、紙面左右方向）に延びるように形成されている。 More specifically, the first outflow connection end portion 26a, the first inflow connection end portion 27a, the second outflow connection end portion 32a, and the second inflow connection end portion 33a are all parallel to each other and are all heat pump housings. It extends in a direction perpendicular to the contact surface when the body 2 and the tank casing 3 are integrated, that is, in a direction adjacent to the heat pump casing 2 and the tank casing 3 (in FIG. It is formed as follows.

さらに、第１流出接続端部２６ａおよび第２流入接続端部３３ａの先端部および第２流出接続端部３２ａおよび第１流入接続端部２７ａの先端部は、それぞれ同一平面上で開口して、Ｕ字状接続配管６１、６２によって接続されている。なお、Ｕ字状接続配管とは、接続配管の略中央部が半円弧状に湾曲して、入口側と出口側の２つの先端部が略同一平面上で開口している接続配管である。 Furthermore, the front end portions of the first outflow connection end portion 26a and the second inflow connection end portion 33a and the front end portions of the second outflow connection end portion 32a and the first inflow connection end portion 27a are respectively opened on the same plane, They are connected by U-shaped connecting pipes 61 and 62. The U-shaped connection pipe is a connection pipe in which a substantially central portion of the connection pipe is curved in a semicircular arc shape, and two tip portions on the inlet side and the outlet side are opened on substantially the same plane.

より具体的には、これらのＵ字状接続配管６１、６２の先端部にも、それぞれ各接続端部２６ａ〜３３ａと同様のフランジ部が設けられており、接続端部２６ａ〜３３ａのフランジ部に対してボルト締め等の締結手段によって接続されている。 More specifically, flange portions similar to the connection end portions 26a to 33a are provided at the tip portions of the U-shaped connection pipes 61 and 62, respectively, and the flange portions of the connection end portions 26a to 33a are provided. Are connected by fastening means such as bolt fastening.

また、Ｕ字状接続配管６１、６２のフランジ部と接続端部２６ａ〜３３ａのフランジ部との間には、Ｏ−リングやガスケットといったシール部材が挟み込まれており、それぞれの接続部から給湯水が漏れることを防止している。 Further, seal members such as O-rings and gaskets are sandwiched between the flange portions of the U-shaped connection pipes 61 and 62 and the flange portions of the connection end portions 26a to 33a, and hot water is supplied from each connection portion. Prevents leakage.

次に、上記構成における本実施形態の作動について説明する。本実施形態のヒートポンプ式給湯機１は、商用電源等の外部電源が供給された状態で、操作パネルに設けられた作動スイッチを投入（ＯＮ）すると作動する。 Next, the operation of this embodiment in the above configuration will be described. The heat pump type hot water heater 1 of the present embodiment operates when an operation switch provided on the operation panel is turned on (ON) while an external power source such as a commercial power source is supplied.

作動スイッチが投入されると、制御装置が、水−冷媒熱交換器２２の水通路２２ｂ入口側給湯水温度、水通路２２ｂ出口側給湯水温度、外気温といった各種センサ群の検出信号および操作パネルに設けられた給湯水温度設定スイッチの操作信号に基づいて、各種電気式アクチュエータ２１ｂ、２３、２４ａ、２５の作動を制御する。 When the operation switch is turned on, the control device detects detection signals of various sensor groups such as the water passage 22b inlet side hot water temperature, the water passage 22b outlet side hot water temperature, and the outside temperature of the water-refrigerant heat exchanger 22 and the operation panel. The operation of the various electric actuators 21b, 23, 24a, 25 is controlled based on the operation signal of the hot water temperature setting switch provided at.

これにより、圧縮機２１から吐出された高温高圧冷媒と水ポンプ２５から流出した給湯水が水−冷媒熱交換器２２に熱交換し、冷媒の有する熱量が給湯水に放熱され、給湯水が加熱される。 As a result, the high-temperature and high-pressure refrigerant discharged from the compressor 21 and the hot water supplied from the water pump 25 exchange heat with the water-refrigerant heat exchanger 22, and the amount of heat of the refrigerant is dissipated to the hot water, thereby heating the hot water. Is done.

水−冷媒熱交換器２２から流出した冷媒は、電気式膨張弁２３にて減圧膨張されて、蒸発器２４へ流入する。この際、電気式膨張弁２３の弁開度は、ヒートポンプサイクル２０の高圧側冷媒圧力が高圧側冷媒温度に応じて決定される目標高圧に近づくように制御される。これにより、ヒートポンプサイクル２０のＣＯＰが略最大値となるように高圧側冷媒圧力が制御される。 The refrigerant flowing out of the water-refrigerant heat exchanger 22 is decompressed and expanded by the electric expansion valve 23 and flows into the evaporator 24. At this time, the valve opening degree of the electric expansion valve 23 is controlled such that the high-pressure side refrigerant pressure of the heat pump cycle 20 approaches a target high pressure determined according to the high-pressure side refrigerant temperature. Thereby, the high-pressure side refrigerant pressure is controlled so that the COP of the heat pump cycle 20 becomes a substantially maximum value.

蒸発器２４へ流入した低圧冷媒は、電動送風ファン２４ａにより送風された外気から吸熱して蒸発し、再び圧縮機２１へ吸入される。一方、水−冷媒熱交換器２２から流出した給湯水は、貯等タンク３１へ戻り、加熱された給湯水が貯湯タンク３１に貯湯される。 The low-pressure refrigerant flowing into the evaporator 24 absorbs heat from the outside air blown by the electric blower fan 24a, evaporates, and is sucked into the compressor 21 again. On the other hand, the hot water supplied from the water-refrigerant heat exchanger 22 returns to the storage tank 31, and the heated hot water is stored in the hot water storage tank 31.

次に、図３により、本実施形態のヒートポンプ式給湯機１の組付方法について説明する。図３は、図２（ａ）に対応するヒートポンプ式給湯機１の外観正面図である。前述の如く、本実施形態のヒートポンプ式給湯機１は、ヒートポンプ筐体２およびタンク筐体３が別体として構成されているので、ヒートポンプ筐体２およびタンク筐体３を別々に設置場所へ搬送する。 Next, with reference to FIG. 3, a method for assembling the heat pump type water heater 1 of the present embodiment will be described. FIG. 3 is an external front view of the heat pump type water heater 1 corresponding to FIG. As described above, in the heat pump type water heater 1 of the present embodiment, since the heat pump casing 2 and the tank casing 3 are configured as separate bodies, the heat pump casing 2 and the tank casing 3 are separately transported to the installation location. To do.

そして、タンク筐体３を設置場所に配置した後、ヒートポンプ筐体２をタンク筐体３と一体化する。具体的には、図３に示すように、設置面Ｇに固定されたタンク筐体３に対して、ヒートポンプベース４の底面を突出形状脚部５ｂの上面に乗り上げるように、ヒートポンプ筐体２を配置する。これにより、ヒートポンプ筐体２およびタンク筐体３が水平方向に隣接配置される。 And after arrange | positioning the tank housing | casing 3 in an installation place, the heat pump housing | casing 2 is integrated with the tank housing | casing 3. FIG. Specifically, as shown in FIG. 3, the heat pump housing 2 is mounted on the tank housing 3 fixed to the installation surface G so that the bottom surface of the heat pump base 4 rides on the upper surface of the projecting leg portion 5b. Deploy. Thereby, the heat pump housing 2 and the tank housing 3 are disposed adjacent to each other in the horizontal direction.

この状態で、ヒートポンプ筐体２およびタンク筐体３同士をボルト締め等の締結手段で一体化させる。さらに、ヒートポンプ筐体２の側面に設けられた開口部２ａを開いて、ヒートポンプ筐体２の内部で、貯湯タンク３１と水−冷媒熱交換器２２とを接続する。 In this state, the heat pump housing 2 and the tank housing 3 are integrated by fastening means such as bolt fastening. Further, the opening 2 a provided on the side surface of the heat pump housing 2 is opened, and the hot water storage tank 31 and the water-refrigerant heat exchanger 22 are connected inside the heat pump housing 2.

具体的には、開口部２ａを介してヒートポンプ筐体２の内部へ、Ｕ字状接続配管６１を挿入して、Ｕ字状接続配管６１のフランジ部を、第１流出接続端部２６ａおよび第２流入接続端部３３ａのフランジ部にボルト締めにて固定する。さらに、Ｕ字状接続配管６２を挿入して、Ｕ字状接続配管６２のフランジ部を、第１流入接続端部２７ａおよび第２流出接続端部３２ａのフランジ部にボルト締めにて固定する。 Specifically, the U-shaped connecting pipe 61 is inserted into the heat pump housing 2 through the opening 2a, and the flange portion of the U-shaped connecting pipe 61 is connected to the first outflow connecting end portion 26a and the first outlet. 2 It fixes to the flange part of the inflow connection end part 33a by bolting. Further, the U-shaped connection pipe 62 is inserted, and the flange portion of the U-shaped connection pipe 62 is fixed to the flange portions of the first inflow connection end portion 27a and the second outflow connection end portion 32a by bolting.

そして、この接続作業の終了後、開口部５ａを板状の閉塞板にて閉じる。さらに、給湯タンク４１の出湯口３１ａと家屋内の台所や風呂等に給湯水を導く給湯配管を接続し、出湯口３１ａと水道水を供給する水道配管とを接続する。これにより、ヒートポンプ式給湯機１の各種配管の接続が完了する。 And after completion | finish of this connection operation | work, the opening part 5a is closed with a plate-shaped obstruction board. Furthermore, the hot water outlet 31a of the hot water supply tank 41 is connected to a hot water supply pipe that guides hot water to a kitchen or a bath in the house, and the hot water outlet 31a is connected to a water supply pipe that supplies tap water. Thereby, the connection of various piping of the heat pump type hot water heater 1 is completed.

本実施形態では、第１流出接続端部２６ａおよび第２流入接続端部３３ａの接続端部同士、並びに、第２流出接続端部３２ａおよび第１流入接続端部２７ａの接続端部同士を、それぞれＵ字状接続配管６１、６２で接続しているので、双方の接続端部にＵ字状接続配管６１、６２を接続する作業を同一の方向から行うことができる。 In the present embodiment, the connection end portions of the first outflow connection end portion 26a and the second inflow connection end portion 33a, and the connection end portions of the second outflow connection end portion 32a and the first inflow connection end portion 27a, Since the U-shaped connection pipes 61 and 62 are connected to each other, the operation of connecting the U-shaped connection pipes 61 and 62 to both connection end portions can be performed from the same direction.

さらに、ヒートポンプ筐体２およびタンク筐体３の製造誤差や、組付設置時の組付誤差によって、接続端部同士の位置が僅かにずれていたとしても、接続端部同士が互いに平行に延びるように、各配管２６、２７、３２、３３を折り曲げているので、各配管２６〜３３および接続端部２６ａ〜３３ａを若干撓ませることで、容易に接続端部同士を接続することができる。 Furthermore, even if the positions of the connection ends are slightly shifted due to manufacturing errors of the heat pump casing 2 and the tank casing 3 or assembly errors during assembly installation, the connection ends extend in parallel with each other. Thus, since each piping 26, 27, 32, 33 is bent, connection ends can be easily connected by slightly bending each piping 26-33 and connection ends 26a-33a.

その結果、ヒートポンプ筐体２内の水−冷媒熱交換器２２とタンク筐体３内の貯湯タンク３１とを接続する際の配管接続時の作業性を向上させることができる。 As a result, workability at the time of pipe connection when connecting the water-refrigerant heat exchanger 22 in the heat pump housing 2 and the hot water storage tank 31 in the tank housing 3 can be improved.

さらに、各接続端部２６ａ〜３３ａが、いずれも互いに平行に形成されているので、いずれの接続端部同士を接続する作業も同一の方向から行うことができる。従って、配管接続時の作業性を、より一層、向上させることができる。 Furthermore, since each of the connection end portions 26a to 33a is formed in parallel to each other, the operation of connecting any of the connection end portions can be performed from the same direction. Therefore, workability at the time of pipe connection can be further improved.

さらに、各接続端部２６ａ〜３３ａが、いずれもヒートポンプ筐体２とタンク筐体３との隣接する方向に延びるように形成されているので、ヒートポンプ式給湯機１全体としての接触面に平行な方向（図２、３では、紙面垂直方向）の奥行寸法を抑制できる。従って、接続配管を接続する作業者自身の作業スペースを確保しやすくなり、より一層、接続作業性を向上させることができる。 Furthermore, since each connection end part 26a-33a is formed so that all may extend in the direction where the heat pump housing | casing 2 and the tank housing | casing 3 adjoin, it is parallel to the contact surface as the heat pump type water heater 1 whole. The depth dimension in the direction (the direction perpendicular to the paper surface in FIGS. 2 and 3) can be suppressed. Therefore, it becomes easy to secure the work space of the worker himself / herself who connects the connection piping, and the connection workability can be further improved.

また、ヒートポンプ筐体２の内部は、ヒートポンプサイクル２０を構成する複数の構成機器の間に、接続端部同士を接続するための空間を確保しやすい。従って、本実施形態の如く、ヒートポンプ筐体２に設けた開口部２ａから、接続端部同士をヒートポンプ筐体２の内部で接続することで、接続端部同士をタンク筐体３内部で接続する場合に対して、接続作業性を向上させることができる。 In addition, the interior of the heat pump housing 2 can easily secure a space for connecting the connection end portions among a plurality of constituent devices constituting the heat pump cycle 20. Therefore, as in the present embodiment, the connection ends are connected to each other inside the tank casing 3 by connecting the connection ends to each other inside the heat pump casing 2 from the opening 2 a provided in the heat pump casing 2. In some cases, the connection workability can be improved.

また、開口部２ａがヒートポンプ筐体２の側面に設けられているので、接続作業時に開口部２ａからヒートポンプ筐体２内部に雨水等が侵入することを抑制できる。さらに、接続作業後、開口部２ａを閉塞板で閉塞するので、ヒートポンプ式給湯機１全体としての意匠性が損なわれることも防止できる。 Moreover, since the opening part 2a is provided in the side surface of the heat pump housing | casing 2, it can suppress that rain water etc. penetrate | invade into the heat pump housing | casing 2 inside from the opening part 2a at the time of a connection operation | work. Furthermore, since the opening part 2a is obstruct | occluded with the obstruction | occlusion board after a connection operation | work, it can also prevent that the designability as the heat pump type water heater 1 whole is impaired.

（他の実施形態）
本発明は上述の実施形態に限定されることなく、以下のように種々変形可能である。 (Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as follows.

（１）上述の実施形態では、第１流出接続端部２６ａおよび第２流入接続端部３３ａの接続端部同士、並びに、第１流入接続端部２７ａおよび第２流出接続端部３２ａの接続端部同士の双方の接続端部同士が、互いに平行な方向に延びるように形成され、Ｕ字状接続配管６１、６２で接続された例を説明したが、少なくとも一方の接続端部同士が互いに平行な方向に延びるように形成され、Ｕ字状接続配管で接続されていてもよい。 (1) In the above-described embodiment, the connection ends of the first outflow connection end portion 26a and the second inflow connection end portion 33a, and the connection ends of the first inflow connection end portion 27a and the second outflow connection end portion 32a. In the above description, the connection end portions of the two portions are formed so as to extend in parallel to each other and connected by the U-shaped connection pipes 61 and 62. However, at least one of the connection end portions is parallel to each other. It may be formed to extend in any direction and may be connected by a U-shaped connection pipe.

（２）上述の実施形態では、各接続端部２６ａ〜３３ａを、いずれも互いに平行な方向に延びるように形成した例を説明したが、第１流出接続端部２６ａおよび第２流入接続端部３３ａの接続端部同士、並びに、第１流入接続端部２７ａおよび第２流出接続端部３２ａの接続端部同士が互いに平行に延びるように形成すればよい。 (2) In the above-described embodiment, the example in which each of the connection end portions 26a to 33a is formed to extend in a direction parallel to each other has been described. However, the first outflow connection end portion 26a and the second inflow connection end portion are described. What is necessary is just to form so that the connection end parts of 33a and the connection end parts of the 1st inflow connection end part 27a and the 2nd outflow connection end part 32a may mutually extend in parallel.

例えば、第１流出接続端部２６ａおよび第２流入接続端部３３ａの接続端部同士が互いに平行に水平方向に延びて、第１流入接続端部２７ａおよび第２流出接続端部３２ａの接続端部同士が互いに平行に鉛直方向に延びるようにしてもよい。さらに、接続作業時の雨水の筐体内への侵入が無視できる場合は、筐体の天盤（上面）に接続作業用の開口部を設けてもよい。 For example, the connection ends of the first outflow connection end portion 26a and the second inflow connection end portion 33a extend in parallel in the horizontal direction, and the connection ends of the first inflow connection end portion 27a and the second outflow connection end portion 32a. The parts may extend in the vertical direction in parallel with each other. Further, when rainwater intrusion into the housing can be ignored at the time of connection work, an opening for connection work may be provided on the top panel (upper surface) of the housing.

（３）上述の実施形態では、ヒートポンプ筐体２内にヒートポンプサイクル２０全体を収容した例を説明したが、少なくとも水−冷媒熱交換機２２をヒートポンプ筐体２に収容する構成とすればよい。 (3) In the above-described embodiment, the example in which the entire heat pump cycle 20 is accommodated in the heat pump casing 2 has been described. However, at least the water-refrigerant heat exchanger 22 may be accommodated in the heat pump casing 2.

（４）上述の実施形態では、各接続端部２６ａ〜３３ａの先端部に設けられたフランジ部およびＵ字状接続配管６１、６２のフランジ部を用いて、各配管２６〜３３およびＵ字状接続配管６１、６２を接続する例を説明したが、ユニオンおよびナットを用いて接続してもよい。 (4) In the above-described embodiment, the pipes 26 to 33 and the U-shape are formed by using the flange portions provided at the distal ends of the connection ends 26 a to 33 a and the flange portions of the U-shaped connection pipes 61 and 62. Although the example which connects the connection piping 61 and 62 was demonstrated, you may connect using a union and a nut.

（５）上述の実施形態では、ヒートポンプ筐体２の内部で接続端部同士を接続する例を説明したが、タンク筐体３の内部で接続作業用の接続端部同士を接続するための空間を確保できる場合は、タンク筐体３の内部で接続端部同士を接続してもよい。 (5) In the above-described embodiment, the example in which the connection end portions are connected inside the heat pump housing 2 has been described. However, the space for connecting the connection end portions for connection work inside the tank housing 3 May be connected within the tank housing 3.

（６）上述の実施形態では、図２（ｂ）に示すように、ヒートポンプ筐体２の前後方向の奥行寸法（すなわち、それぞれの筐体２、３同士の接触面に平行、かつ、上下方向に垂直な寸法）が、タンク筐体３の奥行寸法よりも短い例を説明したが、それぞれの筐体２、３の奥行寸法を略同等としてもよい。 (6) In the above-described embodiment, as shown in FIG. 2B, the depth dimension in the front-rear direction of the heat pump casing 2 (that is, parallel to the contact surfaces of the casings 2 and 3 and in the vertical direction In the above example, the depth dimension of the casings 3 is shorter than the depth dimension of the tank casing 3, but the depth dimensions of the casings 2 and 3 may be substantially equal.

一実施形態のヒートポンプ式給湯機の模式的な全体構成図である。It is a typical whole lineblock diagram of the heat pump type hot water heater of one embodiment. （ａ）は、一実施形態のヒートポンプ式給湯機の断面図である。（ｂ）は、（ａ）のＡ−Ａ断面図である。(A) is sectional drawing of the heat pump type water heater of one Embodiment. (B) is AA sectional drawing of (a). 一実施形態のヒートポンプ式給湯機の正面図である。It is a front view of the heat pump type water heater of one embodiment.

Explanation of symbols

２ヒートポンプ筐体
２ａ開口部
３タンク筐体
２０ヒートポンプサイクル
２２水−冷媒熱交換器
２６第１流出配管
２６ａ第１流出接続端部
２７第１流入配管
２７ａ第１流入接続端部
３１貯湯タンク
３２第２流出配管
３２ａ第２流出接続端部
３３第２流入配管
３３ａ第２流入接続端部
６１、６２Ｕ字状接続配管 2 Heat Pump Housing 2a Opening 3 Tank Housing 20 Heat Pump Cycle 22 Water-Refrigerant Heat Exchanger 26 First Outflow Pipe 26a First Outflow Connection End 27 First Inflow Pipe 27a First Inflow Connection End 31 Hot Water Storage Tank 32 Second 2 outflow piping 32a second outflow connection end 33 second inflow piping 33a second inflow connection end 61, 62 U-shaped connection piping

Claims

A heat pump housing (2) containing a water-refrigerant heat exchanger (22) of a heat pump cycle (20) for heating hot water,
A tank housing (3) in which a hot water storage tank (31) for storing hot water is stored,
A heat pump type hot water heater in which the heat pump casing (2) and the tank casing (3) are arranged adjacent to each other in the horizontal direction and integrated.
The water-refrigerant heat exchanger (22) includes a first outlet pipe (26) through which hot water flows out from the water-refrigerant heat exchanger (22), and the water-refrigerant heat exchanger (22). A first inflow pipe (27) for inflowing hot water is connected,
The hot water storage tank (31) has a second outflow pipe (32) for flowing hot water from the hot water storage tank (31) and a second inflow pipe (33) for flowing hot water into the hot water storage tank (31). Is connected,
The first outflow pipe (26) and the second inflow pipe (33) each have a first outflow connection end (26a) and a second inflow connection end (33a) connected to each other,
The first inflow pipe (27) and the second outflow pipe (32) each have a first inflow connection end (27a) and a second outflow connection end (32a) connected to each other,
The connection ends of the first outflow connection end (26a) and the second inflow connection end (33a), the first inflow connection end (27a), and the second outflow connection end (32a). Among the connection end portions, at least one of the connection end portions is formed so as to extend in a direction parallel to each other, and is connected by a U-shaped connection pipe (61, 62). Heat pump type water heater.

The first outflow connection end (26a), the first inflow connection end (27a), the second outflow connection end (32a), and the second inflow connection end (33a) are all parallel to each other. It is formed so that it may extend in a direction, The heat pump type hot water heater according to claim 1 characterized by things.

The first outflow connection end (26a), the first inflow connection end (27a), the second outflow connection end (32a), and the second inflow connection end (33a) are all in the heat pump housing. The heat pump type hot water heater according to claim 2, wherein the heat pump type hot water heater is formed so as to extend in a direction perpendicular to a contact surface between the body (2) and the tank casing (3).

The connection ends of the first outflow connection end (26a) and the second inflow connection end (33a), the first inflow connection end (27a), and the second outflow connection end (32a). Are connected inside the heat pump housing (2),
The heat pump water heater according to any one of claims 1 to 3, wherein the heat pump casing (2) is provided with an opening (2a) for connection work.

The heat pump type hot water heater according to claim 4, wherein the opening (2a) is provided on a side surface of the heat pump casing (2).