JP4096968B2 - Heat pump type water heater - Google Patents
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- JP4096968B2 JP4096968B2 JP2005305666A JP2005305666A JP4096968B2 JP 4096968 B2 JP4096968 B2 JP 4096968B2 JP 2005305666 A JP2005305666 A JP 2005305666A JP 2005305666 A JP2005305666 A JP 2005305666A JP 4096968 B2 JP4096968 B2 JP 4096968B2
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Description
本発明は、液ガス熱交換器を用いたヒートポンプ式給湯装置に関するものである。 The present invention relates to a heat pump type hot water supply apparatus using a liquid gas heat exchanger.
ヒートポンプ式給湯装置の冷凍サイクルの途中に液ガス熱交換器を用いたのが提供されている。この液ガス熱交換器は、水熱交換器から流出して減圧機構に流入する高圧冷媒と、空気熱交換器から流出した低圧冷媒との熱交換を行なうものである。この液ガス熱交換器を設けることによって、水熱交換器(ガス冷却器)からの冷媒に過冷却を付与し、また、圧縮機に入る冷媒を加熱して、圧縮機の湿り圧縮を防止するようにしている。 It has been provided that a liquid gas heat exchanger is used in the middle of the refrigeration cycle of a heat pump hot water supply apparatus. This liquid gas heat exchanger performs heat exchange between the high-pressure refrigerant that flows out of the water heat exchanger and flows into the decompression mechanism, and the low-pressure refrigerant that flows out of the air heat exchanger. By providing this liquid gas heat exchanger, the refrigerant from the water heat exchanger (gas cooler) is supercooled, and the refrigerant entering the compressor is heated to prevent wet compression of the compressor. I am doing so.
図6に該液ガス熱交換器を用いたヒートポンプ式給湯装置の簡略図を示している(特許文献1参照)。このヒートポンプ式給湯装置は、貯湯タンク1を有するタンクユニット2と、冷凍サイクル3を有するヒートポンプユニット4とを備えている。そして、タンクユニット2の貯湯タンク1には、その底壁に給水口5が設けられると共に、その上壁に出湯口6が設けられている。この給水口5から貯湯タンク1に水道水が供給され、出湯口6から高温の温湯が出湯される。また、貯湯タンク1には、その底壁に取水口7が開設されると共に、側壁(周壁)の上部に湯入口8が開設され、取水口7と湯入口8とが循環路9にて連結されている。そして、この循環路9に水循環用ポンプ10と熱交換路11とが介設されている。すなわち、水循環用ポンプ10が駆動すると、貯湯タンク1内の未加熱水が取水口7から循環路9に流出して、熱交換路11を介して湯入口8から貯湯タンク1内に返流する。 FIG. 6 shows a simplified diagram of a heat pump type hot water supply apparatus using the liquid gas heat exchanger (see Patent Document 1). The heat pump type hot water supply apparatus includes a tank unit 2 having a hot water storage tank 1 and a heat pump unit 4 having a refrigeration cycle 3. The hot water storage tank 1 of the tank unit 2 is provided with a water supply port 5 on its bottom wall and a hot water outlet 6 on its upper wall. Tap water is supplied from the water supply port 5 to the hot water storage tank 1, and hot hot water is discharged from the hot water outlet 6. In addition, the hot water storage tank 1 has a water intake 7 at the bottom wall and a hot water inlet 8 at the top of the side wall (peripheral wall), and the water intake 7 and the hot water inlet 8 are connected by a circulation path 9. Has been. The circulation path 9 is provided with a water circulation pump 10 and a heat exchange path 11. That is, when the water circulation pump 10 is driven, unheated water in the hot water storage tank 1 flows out from the water intake 7 to the circulation path 9 and returns to the hot water storage tank 1 from the hot water inlet 8 through the heat exchange path 11. .
次に、冷凍サイクル3は、圧縮機13と、上記熱交換路11を構成する水熱交換器14と、電動膨張弁(減圧機構)15と、空気熱交換器16とを順に接続して構成されている。すなわち、圧縮機13の吐出口と水熱交換器14とを冷媒通路17にて接続し、水熱交換器14と電動膨張弁15とを冷媒通路18、36にて接続し、電動膨張弁15と空気熱交換器16とを冷媒通路19にて接続し、空気熱交換器16と圧縮機13とを冷媒通路37及び冷媒通路21にて接続している。そして、冷媒としては、例えば、高圧側を超臨界圧力で使用する炭酸ガス等の自然冷媒を用いられる。 Next, the refrigeration cycle 3 is configured by connecting a compressor 13, a water heat exchanger 14 that constitutes the heat exchange path 11, an electric expansion valve (decompression mechanism) 15, and an air heat exchanger 16 in this order. Has been. That is, the discharge port of the compressor 13 and the water heat exchanger 14 are connected by the refrigerant passage 17, the water heat exchanger 14 and the electric expansion valve 15 are connected by the refrigerant passages 18 and 36, and the electric expansion valve 15 And the air heat exchanger 16 are connected by a refrigerant passage 19, and the air heat exchanger 16 and the compressor 13 are connected by a refrigerant passage 37 and a refrigerant passage 21. And as a refrigerant | coolant, natural refrigerant | coolants, such as a carbon dioxide gas which uses a high voltage | pressure side by a supercritical pressure, are used, for example.
また、冷凍サイクル3は、水熱交換器14から流出した高圧冷媒を冷却する液ガス熱交換器25を備えている。この場合、液ガス熱交換器25は、水熱交換器14から流出した高圧冷媒が通過する第1通路26と、空気熱交換器16から流出した低圧冷媒が通過する第2通路27とを備えている。そして、第1通路26を通過する高温高圧の冷媒と、第2通路27を通過する低温低圧の冷媒との間で熱交換が行なわれる。 The refrigeration cycle 3 includes a liquid gas heat exchanger 25 that cools the high-pressure refrigerant that has flowed out of the water heat exchanger 14. In this case, the liquid gas heat exchanger 25 includes a first passage 26 through which the high-pressure refrigerant flowing out from the water heat exchanger 14 passes, and a second passage 27 through which the low-pressure refrigerant flowing out from the air heat exchanger 16 passes. ing. Then, heat exchange is performed between the high-temperature and high-pressure refrigerant passing through the first passage 26 and the low-temperature and low-pressure refrigerant passing through the second passage 27.
次に、このヒートポンプ式給湯装置の運転動作(湯沸かし運転)を説明する。圧縮機13を駆動すると共に、水循環用ポンプ10を駆動(作動)する。すると、貯湯タンク1の底部に設けた取水口7から貯溜水(温湯)が流出し、これが循環路9の熱交換路11を流通する。また、圧縮機13からの吐出冷媒が、水熱交換器14、減圧機構15、空気熱交換器16とを順次経由して上記圧縮機13へと返流する。そのため、循環路9の熱交換路11を流通する水がガス冷却器である水熱交換器14によって加熱され(沸き上げられ)、湯入口8から貯湯タンク1の上部に返流される。そして、このような動作を継続して行なうことによって、貯湯タンク1に高温の温湯が貯湯されることになる。 Next, the operation of the heat pump type hot water supply apparatus (water heater operation) will be described. The compressor 13 is driven and the water circulation pump 10 is driven (actuated). Then, stored water (hot water) flows out from the water intake 7 provided at the bottom of the hot water storage tank 1, and this flows through the heat exchange path 11 of the circulation path 9. Further, the refrigerant discharged from the compressor 13 returns to the compressor 13 via the water heat exchanger 14, the decompression mechanism 15, and the air heat exchanger 16 in order. Therefore, the water flowing through the heat exchange path 11 of the circulation path 9 is heated (boiling) by the water heat exchanger 14 that is a gas cooler, and returned to the upper part of the hot water storage tank 1 from the hot water inlet 8. Then, by continuously performing such an operation, hot hot water is stored in the hot water storage tank 1.
ところで、上記ヒートポンプユニット4において、液ガス熱交換器25が無ければ、熱交換路11への入水温度が低温であるときには、図7(a)のAのようなサイクルを構成するが、熱交換路11への入水温度が高温であるときには、図7(a)のBのようなサイクルとなる。すなわち、図7(a)のAのサイクルと、図7(a)のBのサイクルとでは水熱交換器14である放熱器内の冷媒量差が大きく、熱交換路11への入水温度が上昇すれば、放熱過程でのエンタルピ差が狭くなって、湯加熱能力及びCOPが減少することになる。これに対して、この実施の形態のように、液ガス熱交換器25を備えていれば、入水温度変化による高圧側の冷媒量差を吸収し、入水温度が高温時でも液ガス熱交換器25の出口冷媒の密度が大きく、図7(b)のCのような正常のサイクルを形成する。 By the way, in the heat pump unit 4, if there is no liquid gas heat exchanger 25, a cycle such as A in FIG. 7A is configured when the temperature of water entering the heat exchange path 11 is low. When the incoming water temperature to the path 11 is high, the cycle is as shown in FIG. That is, there is a large refrigerant amount difference in the radiator that is the water heat exchanger 14 between the cycle A in FIG. 7A and the cycle B in FIG. 7A, and the temperature of water entering the heat exchange path 11 is high. If it rises, the enthalpy difference in the heat dissipation process will become narrow, and the hot water heating capacity and COP will decrease. On the other hand, if the liquid gas heat exchanger 25 is provided as in this embodiment, the refrigerant amount difference on the high pressure side due to the change in the incoming water temperature is absorbed, and the liquid gas heat exchanger is used even when the incoming water temperature is high. The density of the outlet refrigerant at 25 is large, and a normal cycle such as C in FIG. 7B is formed.
このように、上記ヒートポンプ式給湯装置では、水熱交換器14から流出して減圧機構15に流入する高圧冷媒と、空気熱交換器16から流出した低圧冷媒との熱交換を行なう液ガス熱交換器25を設けているので、水熱交換器(ガス冷却器)14からの冷媒に過冷却を付与し、また、圧縮機13に入る冷媒を加熱することができる。このため、圧縮機13の湿り圧縮を防止することができ、安定した運転が可能となる。 As described above, in the heat pump hot water supply apparatus, liquid gas heat exchange is performed to exchange heat between the high-pressure refrigerant that flows out of the water heat exchanger 14 and flows into the decompression mechanism 15 and the low-pressure refrigerant that flows out of the air heat exchanger 16. Since the unit 25 is provided, supercooling can be given to the refrigerant from the water heat exchanger (gas cooler) 14 and the refrigerant entering the compressor 13 can be heated. For this reason, wet compression of the compressor 13 can be prevented, and stable operation is possible.
しかしながら、特許文献1に示す従来例においては、上記液ガス熱交換器25を圧縮機13等を配設している狭い機械室に配置していたため、充分な有効長が得られず、熱交換の効率が悪いという問題があった。また、機械室を冷却するための風が液ガス熱交換器25に当たり、放熱ロスが大きいという問題があった。 However, in the conventional example shown in Patent Document 1, since the liquid gas heat exchanger 25 is arranged in a narrow machine room in which the compressor 13 and the like are arranged, a sufficient effective length cannot be obtained and heat exchange is performed. There was a problem of poor efficiency. In addition, there is a problem that heat for cooling the machine room hits the liquid gas heat exchanger 25 and heat dissipation loss is large.
本発明は上述の問題点に鑑みて提供したものであって、液ガス熱交換器に必要な有効長が得られ、また、放熱ロスを少なくすることを目的としたヒートポンプ式給湯装置を提供するものである。 The present invention has been provided in view of the above-described problems, and provides a heat pump type hot water supply apparatus that is capable of obtaining an effective length necessary for a liquid gas heat exchanger and reducing heat dissipation loss. Is.
そこで、本発明の請求項1に記載のヒートポンプ式給湯装置では、圧縮機13と水熱交換器14と減圧機構15と空気熱交換器16とを順次接続したヒートポンプユニット4を備え、上記水熱交換器14にて構成される熱交換路11に未加熱水を供給してこの未加熱水を加熱する沸上運転を可能とし、上記水熱交換器14から流出して減圧機構15に流入する高圧冷媒と、上記空気熱交換器16から流出した低圧冷媒との熱交換を行なう液ガス熱交換器25を設けたヒートポンプ式給湯装置において、上記ヒートポンプユニット4のファン室43においては、ファン22を駆動して空気を前面側へと吹出すことによって空気が背面側の空気熱交換器16を通過するように構成し、上記空気熱交換器16は、ファン室43の底板40に設けた支持板51の上片53上に配置し、さらに、上記液ガス熱交換器25は、上記空気熱交換器16よりも下方であって、上記支持板51よりも空気吹き出し方向前方側の位置において、上記底板40、支持板51、上片51によって形成されるスペース67内に配置し、さらに、上記液ガス熱交換器25よりも空気吹出し方向前方側に水熱交換器14を配置したことを特徴としている。
Therefore, the heat pump hot water supply apparatus according to claim 1 of the present invention includes the heat pump unit 4 in which the compressor 13, the water heat exchanger 14, the decompression mechanism 15, and the air heat exchanger 16 are sequentially connected, and the water heat A boiling operation for supplying unheated water to the heat exchange path 11 constituted by the exchanger 14 to heat the unheated water is enabled, and the water is discharged from the water heat exchanger 14 and flows into the pressure reducing mechanism 15. In the heat pump hot water supply apparatus provided with the liquid gas heat exchanger 25 for performing heat exchange between the high pressure refrigerant and the low pressure refrigerant flowing out of the air heat exchanger 16 , the fan 22 is provided in the fan chamber 43 of the heat pump unit 4. By driving and blowing air to the front side, the air passes through the air heat exchanger 16 on the back side, and the air heat exchanger 16 is supported on the bottom plate 40 of the fan chamber 43. The liquid gas heat exchanger 25 is disposed on the upper piece 53 of the plate 51, and further below the air heat exchanger 16 and at a position on the front side of the support plate 51 in the air blowing direction. It arrange | positions in the space 67 formed by the said baseplate 40, the support plate 51, and the top piece 51, Furthermore, the water heat exchanger 14 has been arrange | positioned in the air blowing direction front side rather than the said liquid gas heat exchanger 25, It is characterized by the above-mentioned. It is said.
請求項2に記載のヒートポンプ式給湯装置では、上記液ガス熱交換器25は、一対のパイプ状の第1通路26及び第2通路27を長手方向に平行に接触させて構成されており、該液ガス熱交換器25を、略中央部分を折り曲げると共に、上記空気熱交換器16の略L型の形状に対応させるように略L型に折曲していることを特徴としている。 In the heat pump type hot water supply apparatus according to claim 2, the liquid gas heat exchanger 25 is configured by contacting a pair of pipe-shaped first passage 26 and second passage 27 in parallel in the longitudinal direction, The liquid gas heat exchanger 25 is characterized in that it is bent in a substantially L shape so as to correspond to a substantially L shape of the air heat exchanger 16 while bending a substantially central portion.
本発明の請求項1に記載のヒートポンプ式給湯装置によれば、液ガス熱交換器を空気熱交換器よりも下方であって、底板40、支持板51、上片51によって形成されるスペース67内に配置し、さらに、液ガス熱交換器25よりも空気吹出し方向前方側に水熱交換器14を配置しているので、ファンによる風が液ガス熱交換器に当たることもなく、そのため、送風による液ガス熱交換器の放熱ロスを少なくすることができる。 According to the heat pump type hot water supply apparatus of the first aspect of the present invention, the space 67 formed by the bottom plate 40, the support plate 51, and the upper piece 51 is located below the air heat exchanger in the liquid gas heat exchanger. Since the water heat exchanger 14 is further disposed in front of the liquid gas heat exchanger 25 in the air blowing direction than the liquid gas heat exchanger 25 , the wind from the fan does not hit the liquid gas heat exchanger. The heat radiation loss of the liquid gas heat exchanger due to can be reduced.
請求項2に記載のヒートポンプ式給湯装置によれば、液ガス熱交換器は、一対のパイプ状の第1通路及び第2通路を長手方向に平行に接触させて構成されており、該液ガス熱交換器を、略中央部分を折り曲げると共に、上記空気熱交換器の略L型の形状に対応させるように略L型に折曲しているので、高圧冷媒と低圧冷媒との熱交換を行なうべく必要な有効長を得ることができる。 According to the heat pump type hot water supply apparatus of claim 2, the liquid gas heat exchanger is configured by contacting a pair of pipe-shaped first passage and second passage in parallel with each other in the longitudinal direction, and the liquid gas Since the heat exchanger is bent in a substantially L shape so as to correspond to the substantially L shape of the air heat exchanger, the heat exchange between the high pressure refrigerant and the low pressure refrigerant is performed. The necessary effective length can be obtained as much as possible.
以下、本発明の実施の形態を図面を参照して詳細に説明する。なお、本発明は、液ガス熱交換器25の配置構造に特徴を有するものであり、ヒートポンプ式給湯装置の配管構成は図6の場合と同様である。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention has the characteristics in the arrangement | positioning structure of the liquid gas heat exchanger 25, and the piping structure of a heat pump type hot-water supply apparatus is the same as that of the case of FIG.
図1は主要な構成部材だけを表したヒートポンプユニット4の分解斜視図を示し、金属製の底板40の上面に立設した仕切板41の一方側を圧縮機13等を配置している機械室42とし、仕切板41の他方側を空気熱交換器16、ファン22等が配置されるファン室43としている。また、ファン22の前面側には天板44を一体化した前板45が配置され、この略格子状の前板45の内面側にベルマウス46がネジ47により固定されるようになっている。なお、ファン22が回転駆動されることで、空気が前板45、ベルマウス46の円形の開口部48を介して吹き出され、その風が空気熱交換器16を通過することで、該空気熱交換器16が冷却される。 FIG. 1 is an exploded perspective view of a heat pump unit 4 showing only main components, and a machine room in which a compressor 13 and the like are arranged on one side of a partition plate 41 erected on the upper surface of a metal bottom plate 40. 42, and the other side of the partition plate 41 is a fan chamber 43 in which the air heat exchanger 16, the fan 22, and the like are arranged. Further, a front plate 45 integrated with a top plate 44 is disposed on the front side of the fan 22, and a bell mouth 46 is fixed to the inner surface side of the substantially lattice-shaped front plate 45 with screws 47. . When the fan 22 is driven to rotate, air is blown out through the front opening 45 and the circular opening 48 of the bell mouth 46, and the air passes through the air heat exchanger 16 so that the air heat is The exchanger 16 is cooled.
図2は空気熱交換器16の背面側から見た分解斜視図であり、図3は要部拡大断面図を示している。空気熱交換器16は略L型に形成されており、この空気熱交換器16を支持固定する支持板51も略L型に形成されていて、この支持板51の上面に空気熱交換器16が支持固定されている。支持板51の下部は、底板40の端縁より立ち上がっているフランジ52の内側に位置して該支持板51が底板40側に配置される。なお、図3に示すように、支持板51の上片53の上面に形成されている台座部54の上面に空気熱交換器16が位置決め固定されている。 FIG. 2 is an exploded perspective view of the air heat exchanger 16 as seen from the back side, and FIG. The air heat exchanger 16 is formed in a substantially L shape, and a support plate 51 for supporting and fixing the air heat exchanger 16 is also formed in a substantially L shape, and the air heat exchanger 16 is formed on the upper surface of the support plate 51. Is supported and fixed. The lower portion of the support plate 51 is located inside the flange 52 rising from the edge of the bottom plate 40, and the support plate 51 is disposed on the bottom plate 40 side. As shown in FIG. 3, the air heat exchanger 16 is positioned and fixed on the upper surface of the pedestal portion 54 formed on the upper surface of the upper piece 53 of the support plate 51.
また、図3に示すように、底板40の上面であってファン室43に位置する箇所(空気熱交換器16の下部の位置)には水熱交換器14が配置されており、この水熱交換器14は、外殻が断熱材55で構成されていて、この断熱材55の内部にパイプ状で二重構造とした水熱交換器部材56が上下方向に積層して配管されている。なお、水熱交換器部材56の上部は、高温冷媒が流れるように配管され、水熱交換器部材56の下部は低温冷媒が流れるように配管されている。 Further, as shown in FIG. 3, the water heat exchanger 14 is disposed at a position (a position below the air heat exchanger 16) located on the upper surface of the bottom plate 40 and in the fan chamber 43. The exchanger 14 has an outer shell made of a heat insulating material 55, and a water heat exchanger member 56 having a pipe-like and double structure is laminated inside the heat insulating material 55 in the vertical direction. The upper part of the water heat exchanger member 56 is piped so that the high-temperature refrigerant flows, and the lower part of the water heat exchanger member 56 is piped so that the low-temperature refrigerant flows.
次に、液ガス熱交換器25の構成、配置位置について説明する。この液ガス熱交換器25は、図4に示すように、水熱交換器14からの高圧冷媒が流れるパイプ状の第1通路26と、この第1通路26の径より大径としたパイプ状の第2通路27とで構成されている。そして、第1通路26及び第2通路27は並設されていて、両通路26、27はロウ付けにて固着されている。液ガス熱交換器25の略中央部分の折り返し部60にて略コ字型であってヘアピン状に折り曲げられており、上下方向に両通路26、27が位置するように折曲してある。また、液ガス熱交換器25は水熱交換器14の周囲に配置すべく、液ガス熱交換器25の途中の折曲部61で略90°に折曲されている。 Next, the configuration and arrangement position of the liquid gas heat exchanger 25 will be described. As shown in FIG. 4, the liquid gas heat exchanger 25 includes a pipe-shaped first passage 26 through which the high-pressure refrigerant from the water heat exchanger 14 flows, and a pipe shape having a diameter larger than the diameter of the first passage 26. And the second passage 27. The first passage 26 and the second passage 27 are arranged side by side, and both the passages 26 and 27 are fixed by brazing. The folded portion 60 at the substantially central portion of the liquid gas heat exchanger 25 is substantially U-shaped and bent into a hairpin shape, and is bent so that both the passages 26 and 27 are positioned in the vertical direction. Further, the liquid gas heat exchanger 25 is bent at approximately 90 ° at a bent portion 61 in the middle of the liquid gas heat exchanger 25 so as to be disposed around the water heat exchanger 14.
液ガス熱交換器25の第1通路26の一方の端部を液(高圧冷媒のこと、以下同じ)が流入する液側入口部62とし、第1通路26の他方の端部を液が流出する液側出口部63としている。また、第2通路27の一方の端部をガス(低圧冷媒のこと、以下同じ)が流入するガス側入口部64とし、第2通路27の他方の端部をガスが流出するガス側出口部65としている。そして、液ガス熱交換器25の第1通路26の液が流れる方向と、第2通路27のガスが流れる方向とが逆方向となるようにしている。 One end portion of the first passage 26 of the liquid gas heat exchanger 25 is a liquid side inlet portion 62 into which liquid (high pressure refrigerant, the same applies hereinafter) flows, and the liquid flows out from the other end portion of the first passage 26. The liquid side outlet portion 63 is used. In addition, one end of the second passage 27 is a gas side inlet portion 64 through which gas (a low-pressure refrigerant, the same applies hereinafter) flows, and the other end of the second passage 27 is a gas side outlet portion through which gas flows out. 65. The direction in which the liquid in the first passage 26 of the liquid gas heat exchanger 25 flows is opposite to the direction in which the gas in the second passage 27 flows.
図5はヒートポンプユニット4の簡略図を示しており、冷媒通路18が液ガス熱交換器25の第1通路26の液側入口部62に接続され、冷媒通路36が液側出口部63に接続される。また、冷媒通路37が液ガス熱交換器25の第2通路27のガス側入口部64に接続され、ガス側出口部65に冷媒通路21が接続される。 FIG. 5 shows a simplified diagram of the heat pump unit 4, wherein the refrigerant passage 18 is connected to the liquid side inlet portion 62 of the first passage 26 of the liquid gas heat exchanger 25, and the refrigerant passage 36 is connected to the liquid side outlet portion 63. Is done. The refrigerant passage 37 is connected to the gas side inlet portion 64 of the second passage 27 of the liquid gas heat exchanger 25, and the refrigerant passage 21 is connected to the gas side outlet portion 65.
一対のパイプ状の第1通路26及び第2通路27で構成される液ガス熱交換器25は、全体形状としては、図2及び図4に示すように、略L型に形成されており、この略L型に形成されている液ガス熱交換器25を水熱交換器14の周囲を囲むように配置している。また、このように液ガス熱交換器25を水熱交換器14の背面から側面にかけて配置した場合、図3に示すように、液ガス熱交換器25は空気熱交換器16の下方に配置された状態となっている。 The liquid gas heat exchanger 25 constituted by a pair of pipe-like first passage 26 and second passage 27 is formed in an approximately L shape as shown in FIGS. 2 and 4 as an overall shape. The liquid gas heat exchanger 25 formed in the substantially L shape is arranged so as to surround the periphery of the water heat exchanger 14. Further, when the liquid gas heat exchanger 25 is disposed from the back surface to the side surface of the water heat exchanger 14 as described above, the liquid gas heat exchanger 25 is disposed below the air heat exchanger 16 as shown in FIG. It is in the state.
つまり、空気熱交換器16は図2に示すように略L型に形成されていて、この略L型に形状に対応させるように液ガス熱交換器25も略L型に形成し、平面状における液ガス熱交換器25の大きさも空気熱交換器16と略同じくらいの大きさとしている。これにより、空気熱交換器16の下方の位置に液ガス熱交換器25を配置でき、また、図3に示すように、支持板51の上片53を境に、上側に空気熱交換器16が配置され、上片53の下側に液ガス熱交換器25が配置される構造となっている。また、支持板51の内側面と水熱交換器14との間に形成されるスペース67に液ガス熱交換器25が配置されることになり、スペース67を有効に利用している。 That is, the air heat exchanger 16 is formed in a substantially L shape as shown in FIG. 2, and the liquid gas heat exchanger 25 is also formed in a substantially L shape so as to correspond to the shape of the substantially L shape. The size of the liquid gas heat exchanger 25 is approximately the same as that of the air heat exchanger 16. Thereby, the liquid gas heat exchanger 25 can be arrange | positioned in the position below the air heat exchanger 16, and as shown in FIG. 3, with the upper piece 53 of the support plate 51 as a boundary, the air heat exchanger 16 is on the upper side. Is arranged, and the liquid gas heat exchanger 25 is arranged below the upper piece 53. Moreover, the liquid gas heat exchanger 25 will be arrange | positioned in the space 67 formed between the inner surface of the support plate 51, and the water heat exchanger 14, and the space 67 is utilized effectively.
また、一対のパイプ状の第1通路26及び第2通路27を長手方向に平行に接触させて構成した液ガス熱交換器25を、略中央部分の折り返し部60にてヘアピン状の折り曲げると共に、空気熱交換器16の略L型の形状に対応させるように水熱交換器14の背面側と側面側にかけて略L型に折曲しているので、ガスと液との熱交換を行なうべく必要な有効長を得ることができる。また、液ガス熱交換器25を空気熱交換器16の下方に配置しているので、ファン22による風が液ガス熱交換器25に当たることもなく、そのため、送風による液ガス熱交換器25の放熱ロスを少なくすることができる。 In addition, the liquid gas heat exchanger 25 configured by bringing the pair of pipe-shaped first passage 26 and the second passage 27 into contact with each other in parallel in the longitudinal direction is bent in a hairpin shape at the folded portion 60 at a substantially central portion, and Since it is bent into a substantially L shape over the back side and the side of the water heat exchanger 14 so as to correspond to the substantially L shape of the air heat exchanger 16, it is necessary to perform heat exchange between the gas and the liquid. Effective length can be obtained. In addition, since the liquid gas heat exchanger 25 is arranged below the air heat exchanger 16, the wind from the fan 22 does not hit the liquid gas heat exchanger 25. Heat dissipation loss can be reduced.
4 ヒートポンプユニット
11 熱交換路
14 水熱交換器
15 減圧機構
16 空気熱交換器
25 液ガス熱交換器
26 第1通路
27 第2通路
4 Heat Pump Unit 11 Heat Exchange Path 14 Water Heat Exchanger 15 Pressure Reduction Mechanism 16 Air Heat Exchanger 25 Liquid Gas Heat Exchanger 26 First Passage 27 Second Passage
Claims (2)
A heat pump unit (4) in which a compressor (13), a water heat exchanger (14), a pressure reducing mechanism (15), and an air heat exchanger (16) are sequentially connected is provided, and the water heat exchanger (14) A heating operation in which unheated water is supplied to the configured heat exchange path (11) to heat the unheated water is enabled, and flows out from the water heat exchanger (14) into the pressure reducing mechanism (15). In the heat pump hot water supply apparatus provided with the liquid gas heat exchanger (25) for exchanging heat between the high-pressure refrigerant that performs and the low-pressure refrigerant that has flowed out of the air heat exchanger (16 ), the fan chamber of the heat pump unit (4) In (43), the fan (22) is driven to blow the air to the front side so that the air passes through the air heat exchanger (16) on the back side, and the air heat exchanger ( 16) is the bottom plate (40) of the fan chamber (43). The liquid gas heat exchanger (25) is disposed below the air heat exchanger (16), and is disposed on the upper piece (53) of the support plate (51) provided on the support plate. (51) at a position on the front side in the air blowing direction in the space (67) formed by the bottom plate (40), the support plate (51) and the upper piece (51), and further the liquid gas heat A heat pump type hot water supply apparatus characterized in that a water heat exchanger (14) is arranged in front of the exchanger (25) in the air blowing direction .
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JP2005305666A JP4096968B2 (en) | 2005-10-20 | 2005-10-20 | Heat pump type water heater |
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JP2005305666A JP4096968B2 (en) | 2005-10-20 | 2005-10-20 | Heat pump type water heater |
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JP4096968B2 true JP4096968B2 (en) | 2008-06-04 |
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