JP2008249169A - Heat pump type water heater - Google Patents

Heat pump type water heater Download PDF

Info

Publication number
JP2008249169A
JP2008249169A JP2007087449A JP2007087449A JP2008249169A JP 2008249169 A JP2008249169 A JP 2008249169A JP 2007087449 A JP2007087449 A JP 2007087449A JP 2007087449 A JP2007087449 A JP 2007087449A JP 2008249169 A JP2008249169 A JP 2008249169A
Authority
JP
Japan
Prior art keywords
hot water
temperature
heat exchanger
bath
water supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2007087449A
Other languages
Japanese (ja)
Other versions
JP5034601B2 (en
Inventor
Masahiro Ohama
昌宏 尾浜
Yoshitsugu Nishiyama
吉継 西山
Teruo Yamamoto
照夫 山本
Tetsuei Kuramoto
哲英 倉本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2007087449A priority Critical patent/JP5034601B2/en
Publication of JP2008249169A publication Critical patent/JP2008249169A/en
Application granted granted Critical
Publication of JP5034601B2 publication Critical patent/JP5034601B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-efficiency heat pump type water heater, hardly causing run-out of hot water and having excellent convenience. <P>SOLUTION: This heat pump type water heater includes: a hot water delivery pipe 18, an intermediate hot water delivery pipe 21 and a water supply pipe connected to the upper part, the intermediate part and the lower part, respectively, of a hot water storage tank 5 for storing hot water heated by a hot water supply heat exchanger 2; a bathtub heat exchanger 6 connected between the upper part of the hot water storage tank 5 and a lower part below the upper part and configured to heat the hot water in a bathtub 8 taking the hot water in the upper part of the hot water storage tank 5 as a heat source; and hot water intermediate mixing valves 19, 22 for mixing hot water from the hot water delivery pipe 18, the intermediate hot water delivery pipe 21 and the water supply pipe 17 and adjusting the same to a preset hot water supply temperature, wherein when a hot water request and a bathtub heating request are given at the same time, some or all of hot water from the upper part of the hot water storing tank 5 radiated by the bathtub heat exchanger 6 is directly used for hot water, whereby hot water can be effectively utilized to lower the possibility of run-out of hot water, the amenity and convenience are improved, and since generation of medium temperature water due to mixing of medium temperature water returned from the bathtub heat exchanger 6 and hot water of the hot water storage tank 5 is decreased, the operation efficiency is improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、風呂の追い焚き機能や暖房機能を備える貯湯式のヒートポンプ給湯機に関するものである。   The present invention relates to a hot water storage type heat pump water heater having a bath reheating function and a heating function.

従来、この種のヒートポンプ給湯機として、貯湯槽の温水を利用した浴槽の追い焚き機能を持ったものがある（例えば、特許文献１参照）。   Conventionally, as this type of heat pump water heater, there is one having a bathtub reheating function using hot water in a hot water tank (see, for example, Patent Document 1).

図７は、上記特許文献１に記載された従来のヒートポンプ給湯機の構成図である。   FIG. 7 is a configuration diagram of a conventional heat pump water heater described in Patent Document 1.

図７において、従来のヒートポンプ給湯機は、圧縮機１、冷媒対水熱交換器である給湯熱交換器２及び蒸発器３などを備えたヒートポンプユニット４と、貯湯槽５及び水対水熱交換器である風呂熱交換器６などを備えた給湯ユニット７とから構成されている。前記貯湯槽５は、給湯熱交換器２を用いて前記ヒートポンプユニット４により加熱された湯を貯湯するものである。   In FIG. 7, a conventional heat pump water heater includes a compressor 1, a heat pump unit 4 including a hot water supply heat exchanger 2 and an evaporator 3 that are refrigerant-to-water heat exchangers, a hot water tank 5, and water-to-water heat exchange. And a hot water supply unit 7 provided with a bath heat exchanger 6 and the like. The hot water storage tank 5 stores hot water heated by the heat pump unit 4 using the hot water supply heat exchanger 2.

また、風呂熱交換器６は、貯湯槽５内の湯を循環させて、浴槽８内の湯を加熱するものである。すなわち、貯湯槽５の上部から熱源側循環ポンプ９によって汲み出された湯は、風呂熱交換器６に導かれて、利用側循環ポンプ１０によって汲み出された浴槽８内の湯または水を加熱した後に、貯湯槽５に戻る。また、貯湯槽５の湯は、浴槽注湯配管１１を通して浴槽８へ注湯され、さらに、蛇口１２を開くことにより給湯ができるように構成されている。
特開２００２−２４３２７５号公報 The bath heat exchanger 6 circulates the hot water in the hot water storage tank 5 to heat the hot water in the bathtub 8. That is, the hot water pumped out from the upper part of the hot water storage tank 5 by the heat source side circulation pump 9 is led to the bath heat exchanger 6 to heat the hot water or water in the bathtub 8 pumped out by the use side circulation pump 10. After that, the hot water tank 5 is returned to. Moreover, the hot water of the hot water storage tank 5 is poured into the bathtub 8 through the bathtub pouring pipe 11, and further, the hot water can be supplied by opening the faucet 12.
JP 2002-243275 A

しかしながら、前記従来のヒートポンプ給湯機の構成では、次のような課題を有していた。   However, the configuration of the conventional heat pump water heater has the following problems.

風呂の追い焚き運転をするときには、多くの場合、浴槽８の温度は、約４０℃前後なので、貯湯槽５の上部から熱源側循環ポンプ９によって汲み出され、風呂熱交換器６に導かれて利用側循環ポンプ１０によって汲み出された浴槽８内の湯を加熱した後に貯湯槽５に戻る時の温度は５０℃前後である。そして、この貯湯槽５に戻ってきた湯は、貯湯槽５内の湯と混合するが、貯湯槽５の戻り位置の湯温によって混合された湯の温度は異なる。   In many cases, the temperature of the bathtub 8 is about 40 ° C. when the bath is reheated, so that it is pumped from the upper part of the hot water tank 5 by the heat source side circulation pump 9 and led to the bath heat exchanger 6. The temperature when returning to the hot water tank 5 after heating the hot water in the bathtub 8 pumped out by the use side circulation pump 10 is around 50 ° C. The hot water returned to the hot water tank 5 is mixed with the hot water in the hot water tank 5, but the temperature of the hot water mixed differs depending on the hot water temperature at the return position of the hot water tank 5.

また、一般的に、蓄熱式のヒートポンプ給湯機の場合、電気料金の安い時間帯である深夜時間帯（たとえば２３時から翌朝の７時）に貯湯槽５全体を、設定された温度に沸き上げる。   In general, in the case of a heat storage type heat pump water heater, the entire hot water tank 5 is heated to a set temperature in the late-night time period (for example, from 23:00 to 7:00 of the next morning), which is a time period when electricity charges are low. .

この時、貯湯槽５の下部から送られてきた低温の水は、給湯熱交換器２で加熱されて高温の水となって、貯湯槽５の上から貯湯される。この貯湯される高温の水と元々あった低温水との境ははっきりした温度層として分かれているのではなく、高温から低温に変化する混合層が存在する。このため、貯湯槽５全体を設定された温度に沸き上げる沸き上げ運転が、沸き上げ完了に近づけば、この混合層を加熱することになる。この場合、ヒートポンプの特性は、給湯熱交換器２の入口水温によって大きく異なる。   At this time, the low-temperature water sent from the lower part of the hot water tank 5 is heated by the hot water supply heat exchanger 2 to become high-temperature water, and is stored from above the hot water tank 5. The boundary between the hot water stored in the hot water and the original low-temperature water is not divided as a clear temperature layer, but there is a mixed layer that changes from high temperature to low temperature. For this reason, if the boiling operation which raises the whole hot water storage tank 5 to the set temperature is brought close to the completion of the boiling, this mixed layer will be heated. In this case, the characteristics of the heat pump vary greatly depending on the inlet water temperature of the hot water supply heat exchanger 2.

つまり、入口水温が高くなるほど圧縮機１の吐出圧力が高くなるため、それに伴って、
運転効率が悪くなり、消費される電力量が多くなる。さらに、入口水温が高温になってくると、急激に吐出圧力が上昇するので、圧縮機１の信頼性確保のため、入口水温が所定の温度になれば、前記沸き上げ運転を終了する。例えば、冬季では、給湯負荷が大きいため、８０℃〜９０℃に貯湯槽５を沸き上げるが、給湯熱交換器２の入口温度が６０℃になれば全量が沸き上がったとして運転を停止する。そして、この深夜に貯湯された湯で、概ね、昼間の給湯負荷を賄うわけである。 That is, since the discharge pressure of the compressor 1 increases as the inlet water temperature increases,
Operating efficiency is reduced and the amount of power consumed is increased. Further, when the inlet water temperature becomes high, the discharge pressure rapidly increases. Therefore, in order to ensure the reliability of the compressor 1, the boiling operation is terminated when the inlet water temperature reaches a predetermined temperature. For example, in the winter season, since the hot water supply load is large, the hot water storage tank 5 is boiled to 80 ° C. to 90 ° C., but if the inlet temperature of the hot water supply heat exchanger 2 reaches 60 ° C., the operation is stopped because the whole amount has boiled. And the hot water stored in the middle of the night covers the daytime hot water supply load.

今、浴槽８内の湯を加熱した後に貯湯槽５に戻ってきた湯と、貯湯槽５の湯とが混合してできた湯の温度が、前記所定の温度（例えば６０℃）以上であれば、その湯は、再度高温に沸き上げられることはない。だから、本来、深夜時間帯に貯湯槽５のほぼ全体を設定された温度（冬であれば８０℃〜９０℃程度）に沸き上げるところを、浴槽８の加熱によって生じた混合層の部分は設定された温度に沸き上げられることなく、そのままで沸き上げ完了となってしまうことがあった。このように貯湯槽５のほぼ全体が高温に沸き上がっていないときには、昼間の給湯負荷に対応できず、湯切れして快適性と利便性に課題があった。   If the hot water returned to the hot water tank 5 after heating the hot water in the bathtub 8 and the hot water in the hot water tank 5 are mixed, the temperature of the hot water is not less than the predetermined temperature (for example, 60 ° C.). The hot water will not be boiled up again. Therefore, the part of the mixed layer produced by the heating of the bathtub 8 is set so that the temperature of the whole hot water tank 5 is heated to the set temperature (about 80 ° C to 90 ° C in winter) in the middle of the night. There is a case where the boiling is completed as it is without being heated to the heated temperature. As described above, when almost the entire hot water tank 5 is not heated to a high temperature, it cannot cope with the hot water supply load in the daytime, and there is a problem in comfort and convenience due to running out of hot water.

他方、浴槽８内の湯を加熱した後に貯湯槽５に戻ってきた湯と、貯湯槽５の湯と混合してできた湯の温度が、前記所定の温度（例えば６０℃）以下であれば、その湯は再度高温に沸き上げられる。ところが、浴槽８から送られてきた水を加熱して貯湯槽５に戻る水温が元々高いので、貯湯槽５の湯水と混合して貯湯槽５の温度を上昇させてしまい、６０℃以下ではあるが、比較的高い温度になる場合がある。この場合、前述したように、沸き上げ運転の効率が非常に悪くなるという課題があった。   On the other hand, if the temperature of the hot water returned to the hot water tank 5 after heating the hot water in the bathtub 8 and the hot water mixed with the hot water of the hot water tank 5 is equal to or lower than the predetermined temperature (for example, 60 ° C.). The hot water is again boiled to a high temperature. However, since the water temperature returned to the hot water tank 5 by heating the water sent from the bathtub 8 is originally high, it is mixed with the hot water in the hot water tank 5 to raise the temperature of the hot water tank 5, which is below 60 ° C. However, there may be a relatively high temperature. In this case, as described above, there is a problem that the efficiency of the boiling operation is extremely deteriorated.

本発明は、上記課題を解決するもので、給湯要求と風呂加熱要求とが同時にあった場合に風呂熱交換器で放熱した貯湯槽上部からの湯の一部または全部を、貯湯槽に戻さず直接給湯に利用することによって、湯切れの可能性を少なくして快適性と利便性の向上を図り、かつ、運転効率向上を図ったヒートポンプ給湯機を提供することを目的とする。   The present invention solves the above-mentioned problem, and when there is a hot water supply request and a bath heating request at the same time, part or all of the hot water from the upper part of the hot water tank radiated by the bath heat exchanger is not returned to the hot water tank. It is an object of the present invention to provide a heat pump water heater that is used for direct hot water supply to improve the comfort and convenience by reducing the possibility of running out of hot water and to improve the operation efficiency.

前記従来の課題を解決するために、本発明のヒートポンプ給湯機は、圧縮機、給湯熱交換器を備えた給湯加熱手段と、前記給湯熱交換器で加熱された温水を貯湯する貯湯槽と、前記貯湯槽の上部に接続された出湯管と、前記貯湯槽の中間部に接続された中間出湯管と、前記貯湯槽の下部に接続された給水管と、風呂熱交換器を途中に設けて前記貯湯槽の上部と前記上部よりも下部とをそれぞれ接続するための風呂熱交換器往き管と風呂熱交換器戻り管とを具備し前記貯湯槽上部の湯を熱源として前記風呂熱交換器を介して浴槽の湯水を加熱する風呂加熱手段と、前記風呂加熱手段を循環する熱源流量を制御する流量制御手段と、給湯温度を設定する給湯温度設定手段と、前記出湯管と前記中間出湯管および前記給水管からの湯水を混合して前記給湯温度設定手段で設定された給湯温度になるように調整する複数の混合弁とを備え、給湯要求と風呂加熱要求とが同時にあった場合、前記風呂熱交換器で放熱した前記貯湯槽上部からの湯の一部または全部を直接給湯に利用するようにしたもので、湯の有効利用ができるので湯切れの可能性を少なくして快適性と利便性の向上を図り、かつ、風呂熱交換器から戻る中温水と貯湯槽の湯との混合による中温水の生成が少なくなるので運転効率の向上を図ることができる。   In order to solve the above-described conventional problems, the heat pump water heater of the present invention includes a compressor, a hot water heater provided with a hot water heat exchanger, a hot water storage tank for storing hot water heated by the hot water heat exchanger, A hot water pipe connected to the upper part of the hot water tank, an intermediate hot water pipe connected to the intermediate part of the hot water tank, a water supply pipe connected to the lower part of the hot water tank, and a bath heat exchanger are provided in the middle. The bath heat exchanger comprises a bath heat exchanger forward pipe and a bath heat exchanger return pipe for connecting the upper part of the hot water tank and the lower part of the upper part, respectively, and the hot water in the upper part of the hot water tank is used as a heat source. Bath heating means for heating the hot water in the bathtub, flow rate control means for controlling the heat source flow rate circulating through the bath heating means, hot water supply temperature setting means for setting hot water temperature, the hot water pipe and the intermediate hot water pipe, Before mixing hot water from the water pipe A plurality of mixing valves that adjust the hot water supply temperature set by the hot water supply temperature setting means, and when there is a hot water supply request and a bath heating request at the same time, from the upper part of the hot water tank radiated by the bath heat exchanger As part of or all of the hot water is used directly for hot water supply, the hot water can be used effectively, reducing the possibility of running out of hot water, improving comfort and convenience, and bath heat exchange. Since the production of intermediate temperature water by mixing the intermediate temperature water returning from the vessel and the hot water in the hot water storage tank is reduced, the operation efficiency can be improved.

本発明のヒートポンプ給湯機は、給湯要求と風呂加熱要求とが同時にあった場合、風呂熱交換器で放熱した貯湯槽上部からの湯の一部または全部を貯湯槽に戻さず直接給湯に利用できるので、湯切れの可能性を少なくして快適性と利便性の向上を図り、かつ、風呂熱交換器から戻る中温水と貯湯槽の湯との混合割合が少なくなるので、運転効率の向上を図ることができる。   The heat pump water heater of the present invention can be directly used for hot water supply without returning to the hot water tank part or all of the hot water from the upper part of the hot water tank radiated by the bath heat exchanger when there is a hot water supply request and a bath heating request at the same time. Therefore, the possibility of running out of hot water is reduced to improve comfort and convenience, and the mixing ratio of hot water in the hot water tank and hot water returning from the bath heat exchanger is reduced, thus improving the operating efficiency. Can be planned.

第１の発明は、圧縮機、給湯熱交換器を備えた給湯加熱手段と、前記給湯熱交換器で加熱された温水を貯湯する貯湯槽と、前記貯湯槽の上部に接続された出湯管と、前記貯湯槽の中間部に接続された中間出湯管と、前記貯湯槽の下部に接続された給水管と、風呂熱交換器を途中に設けて前記貯湯槽の上部と前記上部よりも下部とをそれぞれ接続するための風呂熱交換器往き管と風呂熱交換器戻り管とを具備し前記貯湯槽上部の湯を熱源として前記風呂熱交換器を介して浴槽の湯水を加熱する風呂加熱手段と、前記風呂加熱手段を循環する熱源流量を制御する流量制御手段と、給湯温度を設定する給湯温度設定手段と、前記出湯管と前記中間出湯管および前記給水管からの湯水を混合して前記給湯温度設定手段で設定された給湯温度になるように調整する複数の混合弁とを備え、給湯要求と風呂加熱要求とが同時にあった場合、前記風呂熱交換器で放熱した前記貯湯槽上部からの湯の一部または全部を直接給湯に利用するようにしたもので、湯の有効利用ができるので湯切れの可能性を少なくして快適性と利便性の向上を図り、かつ、風呂熱交換器から戻る中温水と貯湯槽の湯との混合による中温水の生成が少なくなるので運転効率の向上を図ることができる。   1st invention is a hot water supply heating means provided with the compressor and the hot water supply heat exchanger, the hot water storage tank which stores the hot water heated with the said hot water supply heat exchanger, and the hot water pipe connected to the upper part of the said hot water storage tank, An intermediate hot water pipe connected to the intermediate part of the hot water tank, a water supply pipe connected to the lower part of the hot water tank, an upper part of the hot water tank and a lower part than the upper part by providing a bath heat exchanger in the middle Bath heating means comprising a bath heat exchanger forward pipe and a bath heat exchanger return pipe for connecting the hot water in the bathtub through the bath heat exchanger with the hot water at the top of the hot water tank as a heat source The hot water supply by mixing the flow rate control means for controlling the flow rate of the heat source circulating through the bath heating means, the hot water supply temperature setting means for setting the hot water supply temperature, the hot water pipe, the intermediate hot water pipe and the hot water from the water supply pipe. Make the hot water temperature set by the temperature setting means A plurality of mixing valves to be adjusted, and when there is a hot water supply request and a bath heating request at the same time, a part or all of the hot water from the upper part of the hot water tank radiated by the bath heat exchanger is directly used for hot water supply. By making effective use of hot water, the possibility of running out of hot water is reduced to improve comfort and convenience, and by mixing hot water in the hot water tank and hot water returned from the bath heat exchanger Since the production of intermediate temperature water is reduced, the operation efficiency can be improved.

第２の発明は、特に、第１の発明の一端が風呂熱交換器に接続された風呂熱交換器戻り管の他端を、中間出湯管の途中に接続したもので、給湯要求と風呂加熱要求とが同時にあった場合、風呂熱交換器で放熱した前記貯湯槽上部からの湯の一部または全部を直接給湯に利用するために、簡単な構成とすることができ、機器の軽量化、小型化、信頼性の向上を図ることができる。   In particular, the second invention is the one in which one end of the first invention is connected to the other end of the return pipe of the bath heat exchanger connected to the bath heat exchanger in the middle of the intermediate hot water pipe. When there is a request at the same time, in order to use a part or all of the hot water from the upper part of the hot water tank radiated by the bath heat exchanger directly for hot water supply, it can be configured simply, reducing the weight of the equipment, Miniaturization and improved reliability can be achieved.

第３の発明は、特に、第１の発明の風呂熱交換器に接続された風呂熱交換器戻り管と貯湯槽との接続部と、中間出湯管と前記貯湯槽との接続部とを異なる位置とし、前記中間出湯管と前記風呂熱交換器戻り管とを接続するバイパス管と、前記風呂熱交換器で熱交換した前記貯湯槽の上部の湯の経路を中間出湯管側か前記風呂熱交換器戻り管と前記貯湯槽との接続部側かを選択して切り換える切り換え手段とを備えたもので、風呂加熱時の貯湯槽への戻り位置と中間出湯時の貯湯槽からの取り出し位置とが独立して互いに影響されないので、それぞれ効率の良い中間出湯と風呂加熱ができ、かつ、給湯要求と風呂加熱要求が同時にあった場合、風呂熱交換器で放熱した貯湯槽上部からの湯を貯湯槽に戻さず給湯端末に流して利用するので、快適性と利便性の向上と、かつ、運転効率の向上を図ることができる。   In particular, the third invention is different in the connecting portion between the bath heat exchanger return pipe connected to the bath heat exchanger of the first invention and the hot water tank, and the connecting portion between the intermediate hot water pipe and the hot water tank. A bypass pipe for connecting the intermediate hot water pipe and the bath heat exchanger return pipe, and a hot water path in the upper part of the hot water storage tank where heat is exchanged by the bath heat exchanger, Switching means for selecting and switching between the exchanger return pipe and the hot water tank side, and a return position to the hot water tank during bath heating and a take-out position from the hot water tank during intermediate hot water Are independent of each other, so that efficient intermediate hot water and bath heating can be performed, and hot water from the upper part of the hot water tank radiated by the bath heat exchanger is stored when there is a hot water supply request and a bath heating request at the same time. Comfortable because it is used in the hot water supply terminal without returning to the tank And the improvement of convenience, and it is possible to improve the operating efficiency.

第４の発明は、特に、第３の発明の給湯要求と風呂加熱要求とが同時にあった場合、風呂熱交換器で熱交換した貯湯槽上部の湯を中間出湯管側に流れるように切り換え手段を制御するもので、給湯要求と風呂加熱要求が同時にあった場合、風呂熱交換器で放熱した貯湯槽上部からの湯を貯湯槽に戻さず給湯端末に流して利用するので、湯切れの可能性を少なくして快適性と利便性の大幅な向上と、かつ、風呂熱交換器から戻る中温水と貯湯槽の湯とが混合して中温水の生成が少なくなるので運転効率の大幅な向上を図ることができる。   According to the fourth aspect of the invention, in particular, when the hot water supply request and the bath heating request of the third invention are simultaneously provided, the switching means is arranged so that the hot water in the upper part of the hot water storage tank exchanged with the bath heat exchanger flows to the intermediate outlet pipe side. When there is a hot water supply request and a bath heating request at the same time, hot water from the upper part of the hot water tank radiated by the bath heat exchanger is used by flowing it to the hot water supply terminal without returning it to the hot water tank, so it is possible to run out of hot water. And greatly improved comfort and convenience, and the medium hot water returning from the bath heat exchanger and the hot water in the hot water tank are mixed to reduce the production of hot water, thus greatly improving the operation efficiency. Can be achieved.

第５の発明は、特に、第１〜４のいずれか一つの発明の中間出湯管からの湯水と出湯管からの湯とを混合する中間混合弁と、前記中間混合弁からの湯と給水管からの水とを混合する給湯混合弁とを備えたもので、給湯要求と風呂加熱要求とが同時にあった場合、風呂熱交換器で放熱した貯湯槽上部からの湯の一部または全部を貯湯槽に戻さず、給湯端末に通じる流路構成にできるので、簡単な構成で湯を有効利用することができる。   In particular, the fifth aspect of the invention relates to an intermediate mixing valve that mixes hot water from the intermediate hot water pipe and hot water from the hot water pipe of any one of the first to fourth inventions, and hot water and a water supply pipe from the intermediate mixing valve. If there is a hot water supply request and a bath heating request at the same time, part or all of the hot water from the upper part of the hot water tank radiated by the bath heat exchanger is stored. Since it is possible to have a flow path configuration leading to the hot water supply terminal without returning to the tank, the hot water can be effectively used with a simple configuration.

第６の発明は、特に、第１〜５のいずれか一つの発明の流量制御手段として、風呂熱交換器の熱源側に設けられ貯湯槽の湯を循環させる熱源側循環ポンプと、同じく前記風呂熱
交換器の熱源側に設けられた流量制御弁とを用いたもので、給湯要求と風呂加熱要求とが同時にあった場合でも、風呂熱交換器で放熱した貯湯槽上部からの湯の一部または全部を貯湯槽に戻さず、給湯端末に流して湯を有効利用しながら、安定した信頼性の高い風呂加熱ができる。 The sixth aspect of the invention is a heat source side circulation pump that is provided on the heat source side of the bath heat exchanger and circulates the hot water in the hot water tank, as the flow rate control means of any one of the first to fifth aspects of the invention. Part of the hot water from the upper part of the hot water tank radiated by the bath heat exchanger, even when there is a hot water supply request and a bath heating request at the same time, using a flow control valve provided on the heat source side of the heat exchanger Alternatively, it is possible to perform stable and reliable bath heating while effectively using hot water by flowing it to a hot water supply terminal without returning it all to the hot water tank.

第７の発明は、特に、第１〜６のいずれか一つの発明の給湯要求と風呂加熱要求が同時にあった場合、風呂熱交換器で熱交換した貯湯槽の上部の湯が中間出湯管を通って前記貯湯槽に戻らないようにする流入防止手段を備えたもので、給湯要求と風呂加熱要求が同時にあった場合、風呂熱交換器で放熱した貯湯槽上部からの湯のすべてを貯湯槽に戻さず給湯端末に流して利用するので、湯切れの可能性を少なくして快適性と利便性の大幅な向上と、かつ、風呂熱交換器から戻る中温水と貯湯槽の湯との混合による中温水の生成が少なくなるので運転効率の大幅な向上を図ることができる。   In the seventh invention, in particular, when there is a hot water supply request and a bath heating request of any one of the first to sixth inventions at the same time, the hot water in the upper part of the hot water storage tank that has exchanged heat with the bath heat exchanger is connected to the intermediate hot water pipe. It is equipped with inflow prevention means that prevents it from passing back to the hot water storage tank, and when there is a hot water supply request and a bath heating request at the same time, all the hot water from the upper part of the hot water tank radiated by the bath heat exchanger is stored in the hot water storage tank. The hot water supply terminal is used instead of returning to the hot water supply terminal, so the possibility of running out of hot water is reduced, the comfort and convenience are greatly improved, and the medium hot water returned from the bath heat exchanger and hot water in the hot water tank are mixed. As a result, the production of medium temperature water is reduced, so that the operating efficiency can be greatly improved.

第８の発明は、特に、第５〜７のいずれか一つの発明の中間混合弁の目標混合温度を、給湯温度設定手段で設定された給湯設定温度と風呂熱交換器の熱源側出口の温度に基づいて決定するもので、安定した給湯温度が得られるので、快適性と利便性の向上と運転効率の向上を図ることができる。   In the eighth aspect of the invention, in particular, the target mixing temperature of the intermediate mixing valve according to any one of the fifth to seventh aspects of the invention is set to the hot water supply set temperature set by the hot water supply temperature setting means and the temperature at the heat source side outlet of the bath heat exchanger Since a stable hot water supply temperature is obtained, the comfort and convenience can be improved, and the driving efficiency can be improved.

第９の発明は、特に、第５〜７のいずれか一つの発明の中間混合弁の目標混合温度を、給湯温度設定手段で設定された給湯設定温度と風呂熱交換器の熱源側出口の温度との内でいずれか高い方の温度よりも所定の温度だけ高い温度に設定するもので、安定した給湯温度が得られるので、快適性と利便性の向上と運転効率の向上を図ることができる。   In the ninth aspect of the invention, in particular, the target mixing temperature of the intermediate mixing valve according to any one of the fifth to seventh aspects of the invention is set to the hot water supply set temperature set by the hot water supply temperature setting means and the temperature at the heat source side outlet of the bath heat exchanger Is set to a temperature that is higher than the higher one by a predetermined temperature, and a stable hot water supply temperature can be obtained, so that comfort and convenience can be improved and driving efficiency can be improved. .

第１０の発明は、特に、第１〜９のいずれか一つの発明のヒートポンプの冷媒回路は、圧力が臨界圧力以上となる超臨界冷媒回路であり、前記臨界圧力以上に昇圧された冷媒により水を加熱するもので、例えば、冷媒として二酸化炭素を用いれば、高温高効率化と地球環境保全を図ることができる。   According to a tenth aspect of the invention, in particular, the refrigerant circuit of the heat pump according to any one of the first to ninth aspects is a supercritical refrigerant circuit in which the pressure is equal to or higher than a critical pressure. For example, if carbon dioxide is used as a refrigerant, high efficiency and high environmental conservation can be achieved.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１は、本発明の第１の実施の形態におけるヒートポンプ給湯機の構成図である。尚、上記従来のヒートポンプ給湯機と同一部分については、同一符号を付してその説明を省略する。 (Embodiment 1)
FIG. 1 is a configuration diagram of a heat pump water heater in the first embodiment of the present invention. In addition, about the same part as the said conventional heat pump water heater, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

図１において、本実施の形態におけるヒートポンプ給湯機の熱源である給湯加熱手段１３は、圧縮機１、給湯熱交換器２、減圧装置１４および大気熱を吸熱する蒸発器３からなるヒートポンプサイクルを構成したヒートポンプ熱源である。そして、貯湯槽５の下部から循環ポンプ１５、給湯熱交換器２および貯湯槽５の上部を順次接続する沸き上げ回路を構成することによって、貯湯槽５から循環ポンプ１５で送られてきた水は、前記給湯熱交換器２で冷媒熱により加熱されて貯湯槽５の上から貯湯される。   In FIG. 1, a hot water supply heating means 13 which is a heat source of a heat pump water heater in the present embodiment constitutes a heat pump cycle including a compressor 1, a hot water supply heat exchanger 2, a decompression device 14, and an evaporator 3 that absorbs atmospheric heat. Heat pump heat source. And the water sent with the circulation pump 15 from the hot water tank 5 is comprised by comprising the boiling circuit which connects the upper part of the circulation pump 15, the hot water supply heat exchanger 2, and the hot water tank 5 from the lower part of the hot water tank 5 sequentially. The hot water supply heat exchanger 2 is heated by the refrigerant heat and is stored from above the hot water storage tank 5.

１６は、沸き上げ温度検出手段であり、ヒートポンプ熱源で加熱した湯温を検出するため、給湯熱交換器２の水側の出口に設けられている。そして、高圧側の冷媒圧力が臨界圧力以上となる二酸化炭素を冷媒としている。   Reference numeral 16 denotes boiling temperature detection means, which is provided at the water-side outlet of the hot water supply heat exchanger 2 in order to detect the temperature of the hot water heated by the heat pump heat source. The carbon dioxide whose refrigerant pressure on the high pressure side is equal to or higher than the critical pressure is used as the refrigerant.

貯湯槽５への給水は、貯湯槽５の下部に接続された給水管１７を通ってなされ、貯湯槽５上部の高温の湯は、出湯管１８を通り給湯混合弁１９で給水と混合されることによって所定の温度の湯にしてから、給湯管２０を通って給湯端末の一つである蛇口１２から給湯
される。また、貯湯槽５の中間部に接続された中間出湯管２１は、出湯管１８の途中に設けられた中間混合弁２２に接続されている。 Water supply to the hot water storage tank 5 is made through a water supply pipe 17 connected to the lower part of the hot water storage tank 5, and hot water at the upper part of the hot water storage tank 5 passes through the hot water supply pipe 18 and is mixed with the water supply by the hot water supply mixing valve 19. Thus, the hot water is heated to a predetermined temperature, and then hot water is supplied from the faucet 12 which is one of the hot water supply terminals through the hot water supply pipe 20. The intermediate hot water pipe 21 connected to the intermediate portion of the hot water storage tank 5 is connected to an intermediate mixing valve 22 provided in the middle of the hot water pipe 18.

風呂加熱手段２３は、水水熱交換器である風呂熱交換器６と、それに接続された熱源側水回路２３ａ、利用側水回路２３ｂと、それら熱源側、利用側水回路２３ａ、２３ｂにそれぞれ設けられた熱源側循環ポンプ９と利用側循環ポンプ１０などからなる。また風呂熱交換器６の熱源側は、貯湯槽５の上部と風呂熱交換器往き管２４で接続され、また貯湯槽５の前記上部よりも下部と接続するために風呂熱交換器戻り管２５を備え、前記中間出湯管２１の途中に接続されている。   The bath heating means 23 includes a bath heat exchanger 6 which is a water / water heat exchanger, a heat source side water circuit 23a and a use side water circuit 23b connected thereto, and a heat source side and use side water circuits 23a and 23b, respectively. The heat source side circulation pump 9 and the use side circulation pump 10 are provided. Further, the heat source side of the bath heat exchanger 6 is connected to the upper part of the hot water tank 5 by the bath heat exchanger forward pipe 24, and the bath heat exchanger return pipe 25 is connected to the lower part of the hot water tank 5 rather than the upper part. And is connected in the middle of the intermediate tap pipe 21.

そして、浴槽８の加熱は、熱源側循環ポンプ９で貯湯槽５から風呂熱交換器６に送られてきた高温の温水と、利用側循環ポンプ１０で浴槽８から風呂熱交換器６に送られてきた水又は温水とが熱交換することによって行われる。   Heating of the bathtub 8 is sent from the hot water tank 5 to the bath heat exchanger 6 by the heat source side circulation pump 9 and from the bathtub 8 to the bath heat exchanger 6 by the use side circulation pump 10. This is done by exchanging heat with warm water or hot water.

また、風呂熱交換器６の熱源側出口には熱源側出口温度を検出する熱源側出口温度検出手段２７を、利用側の入口と出口にはそれぞれの水温を検出するために利用側入口温度検出手段２８と利用側出口温度検出手段２９が設けられている。ここで、熱源側循環ポンプ９が流量制御手段３０である。   Further, the heat source side outlet temperature detecting means 27 for detecting the heat source side outlet temperature is provided at the heat source side outlet of the bath heat exchanger 6, and the use side inlet temperature detection for detecting the respective water temperatures at the inlet and outlet on the use side. Means 28 and utilization side outlet temperature detection means 29 are provided. Here, the heat source side circulation pump 9 is the flow rate control means 30.

そして、制御手段２６と熱源側循環ポンプ９と利用側入口温度検出手段２８及び熱源側出口温度検出手段２７とで、風呂加熱手段２３における熱源側流量を制御することによって風呂熱交換器６での加熱能力を制御する。   The control means 26, the heat source side circulation pump 9, the use side inlet temperature detection means 28, and the heat source side outlet temperature detection means 27 control the heat source side flow rate in the bath heating means 23, thereby controlling the heat in the bath heat exchanger 6. Control the heating capacity.

さらに、給湯混合弁１９の出口側には、給湯混合弁１９で混合された湯温を検出する給湯温度検出手段３１を設け、中間混合弁２２の出口側には、中間混合弁２２で混合された湯温を検出する中間温度検出手段３２を設けている。また、リモコン（図示せず）などで希望する給湯温度を設定する給湯温度設定手段３３と、給湯混合弁１９と中間混合弁２２の動作を制御する混合弁制御手段３４とを備えている。   Further, a hot water supply temperature detecting means 31 for detecting the hot water temperature mixed by the hot water supply mixing valve 19 is provided on the outlet side of the hot water supply mixing valve 19, and the intermediate mixing valve 22 is mixed on the outlet side of the intermediate mixing valve 22. An intermediate temperature detecting means 32 for detecting the hot water temperature is provided. Further, a hot water supply temperature setting means 33 for setting a desired hot water supply temperature with a remote controller (not shown) or the like, and a mixing valve control means 34 for controlling operations of the hot water supply mixing valve 19 and the intermediate mixing valve 22 are provided.

また、貯湯槽５の上部の湯と給水管１７の水から所定の温度に混合する注湯混合弁３５と、注湯開閉弁３６とから風呂注湯回路が構成されており、注湯温度検出手段３７は前記注湯混合弁３５の混合温度を検出する。   Also, a bath pouring circuit is constituted by a pouring mixing valve 35 that mixes the hot water in the upper part of the hot water tank 5 and the water in the water supply pipe 17 to a predetermined temperature, and a pouring on / off valve 36, and the pouring temperature is detected. The means 37 detects the mixing temperature of the pouring mixing valve 35.

以上のように構成された本実施の形態におけるヒートポンプ給湯機について、以下にその動作、作用を説明する。   About the heat pump water heater in this Embodiment comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

図１において、先ず、給湯加熱モードについて説明する。いま、貯湯槽５を沸き上げる要求（図示せず）があると、ヒートポンプ熱源で大気熱を利用した給湯加熱運転を行う。この場合、圧縮機１から吐出された臨界圧力以上の高温高圧の冷媒が給湯熱交換器２に流入し、ここで貯湯槽５の下部から送られてきた水と熱交換し放熱した後、減圧装置１４で減圧し、さらに、蒸発器３で大気から熱を吸熱し、ガス化して圧縮機１に戻る。この時、給湯熱交換器２に流入する高温冷媒で給湯熱交換器２の出口水温が所定温度となるように循環ポンプ１５の回転数を制御し、所定の温度の湯が貯湯槽５の上部から流入し貯湯される。   In FIG. 1, first, the hot water supply heating mode will be described. If there is a request (not shown) for boiling the hot water storage tank 5, a hot water supply heating operation using atmospheric heat is performed with a heat pump heat source. In this case, the high-temperature and high-pressure refrigerant discharged from the compressor 1 is heated to a hot water supply heat exchanger 2 where heat is exchanged with the water sent from the lower part of the hot water tank 5 to dissipate the heat. The pressure is reduced by the apparatus 14, and heat is absorbed from the atmosphere by the evaporator 3, gasified, and returned to the compressor 1. At this time, the number of revolutions of the circulation pump 15 is controlled so that the outlet water temperature of the hot water supply heat exchanger 2 becomes a predetermined temperature with the high-temperature refrigerant flowing into the hot water supply heat exchanger 2, and the hot water of the predetermined temperature is It flows in from and is stored.

次に、単独給湯モードについて説明する。給湯端末である蛇口１２が開かれると混合弁制御手段３４は、中間混合弁２２を貯湯槽５側に全開（通常はこの位置が初期設定位置）にする。そして、給湯混合弁１９の出口（混合）温度が給湯温度設定手段３３で設定された給湯設定温度になるように、給湯温度検出手段３１から得られた温度をもとに給湯混合弁１９の開度を制御することによって、所定の給湯温度の湯を蛇口１２から給湯する。   Next, the single hot water supply mode will be described. When the faucet 12 serving as a hot water supply terminal is opened, the mixing valve control means 34 fully opens the intermediate mixing valve 22 to the hot water tank 5 side (usually, this position is the initial setting position). Then, the hot water mixing valve 19 is opened based on the temperature obtained from the hot water temperature detecting means 31 so that the outlet (mixing) temperature of the hot water mixing valve 19 becomes the hot water temperature setting temperature set by the hot water temperature setting means 33. By controlling the degree, hot water of a predetermined hot water temperature is supplied from the tap 12.

さらに、中間給湯モードについて説明する。給湯端末である蛇口１２が開かれると混合弁制御手段３４は、中間混合弁２２の出口（混合）温度が給湯温度設定手段３３で設定された給湯設定温度よりも所定の温度だけ高い温度になるように、貯湯槽５の上部からの湯と中間出湯管２１からの湯の混合割合を調整するために 、中間温度検出手段３２から得られた温度をもとに、中間混合弁２２の開度を制御する。さらに、給湯混合弁１９の出口（混合）温度が給湯温度設定手段３３で設定された給湯設定温度になるように、中間混合弁２２からの湯と給水管１７からの水の混合割合を調節するために、給湯温度検出手段３１から得られた温度をもとに給湯混合弁１９の開度を制御することによって、所定の給湯温度の湯を蛇口１２から給湯する。   Further, the intermediate hot water supply mode will be described. When the faucet 12 serving as a hot water supply terminal is opened, the mixing valve control means 34 causes the outlet (mixing) temperature of the intermediate mixing valve 22 to be higher than the hot water supply set temperature set by the hot water supply temperature setting means 33 by a predetermined temperature. Thus, in order to adjust the mixing ratio of the hot water from the upper part of the hot water storage tank 5 and the hot water from the intermediate tap pipe 21, the opening degree of the intermediate mixing valve 22 is based on the temperature obtained from the intermediate temperature detecting means 32. To control. Further, the mixing ratio of hot water from the intermediate mixing valve 22 and water from the water supply pipe 17 is adjusted so that the outlet (mixing) temperature of the hot water supply mixing valve 19 becomes the hot water supply set temperature set by the hot water supply temperature setting means 33. Therefore, hot water having a predetermined hot water temperature is supplied from the faucet 12 by controlling the opening degree of the hot water mixing valve 19 based on the temperature obtained from the hot water temperature detecting means 31.

次に、風呂注湯モードについて説明する。リモコンなどで浴槽８への注湯要求（図示せず）があると注湯開閉弁３６が開かれる。そして、注湯混合弁３５の出口（混合）温度がリモコン（図示せず）などで設定した所定の注湯温度になるように注湯温度検出手段３７から得られた温度をもとに注湯混合弁３５の開度を調節する。   Next, the bath pouring mode will be described. When there is a pouring request (not shown) to the bathtub 8 with a remote controller or the like, the pouring on / off valve 36 is opened. Based on the temperature obtained from the pouring temperature detecting means 37 so that the outlet (mixing) temperature of the pouring mixing valve 35 becomes a predetermined pouring temperature set by a remote controller (not shown) or the like. The opening degree of the mixing valve 35 is adjusted.

さらに、通常の単独風呂加熱モードについて説明する。いま、風呂の加熱要求（図示せず）があると、利用側循環ポンプ１０を駆動する。そして、制御手段２６は、熱源側循環ポンプ９を駆動する。利用側循環ポンプ１０によって浴槽８から送られてきた水は、熱源側循環ポンプ９によって送られてきた貯湯槽５上部の高温の湯と、風呂熱交換器６で熱交換して加熱されて浴槽８に戻る。   Furthermore, the normal single bath heating mode will be described. Now, when there is a bath heating request (not shown), the use-side circulation pump 10 is driven. Then, the control means 26 drives the heat source side circulation pump 9. The water sent from the bathtub 8 by the use side circulation pump 10 is heated by exchanging heat with the hot water in the upper part of the hot water tank 5 sent by the heat source side circulation pump 9 in the bath heat exchanger 6. Return to 8.

また、熱源側循環ポンプ９によって貯湯槽５から送られてきた高温の湯は、前述した利用側循環ポンプ１０によって送られてきた浴槽８の湯と、風呂熱交換器６で熱交換して貯湯槽５に戻る。このとき、制御手段２６は、必要な能力で効率よく風呂加熱するために、熱源側循環ポンプ９の流量を制御する。   The hot water sent from the hot water storage tank 5 by the heat source side circulation pump 9 exchanges heat with the hot water in the bathtub 8 sent by the use side circulation pump 10 and the hot water stored in the bath heat exchanger 6. Return to tank 5. At this time, the control means 26 controls the flow rate of the heat source side circulation pump 9 in order to efficiently heat the bath with the necessary capacity.

例えば、風呂熱交換器６の熱源側出口温度と風呂熱交換器６の利用側入口温度との温度差に応じて熱源側の温水の流量を制御する。つまり、制御手段２６は、熱源側出口温度検出手段２７と利用側入口温度検出手段２８とから得られた風呂熱交換器６の熱源側出口温度と利用側入口温度を検出し、この両者の温度差が所定の温度（例えば５Ｋ）になるように熱源側循環ポンプ９の回転数を制御する。このように制御すれば、浴槽８の温度が変化しても貯湯槽５への戻り温度も比較的低くすることができ、かつ、風呂加熱能力も比較的大きくすることができる。   For example, the flow rate of hot water on the heat source side is controlled according to the temperature difference between the heat source side outlet temperature of the bath heat exchanger 6 and the use side inlet temperature of the bath heat exchanger 6. That is, the control means 26 detects the heat source side outlet temperature and the use side inlet temperature of the bath heat exchanger 6 obtained from the heat source side outlet temperature detection means 27 and the use side inlet temperature detection means 28, and the temperature of both of them. The rotational speed of the heat source side circulation pump 9 is controlled so that the difference becomes a predetermined temperature (for example, 5K). By controlling in this way, even if the temperature of the bathtub 8 changes, the return temperature to the hot water tank 5 can be made relatively low, and the bath heating ability can be made relatively large.

次に、給湯要求と風呂加熱要求とが同時にあった場合の同時給湯風呂加熱モードについて説明する。   Next, the simultaneous hot water bath heating mode when there is a hot water request and a bath heating request will be described.

まず、給湯要求として給湯端末である蛇口１２が開かれると、混合弁制御手段３４は、中間混合弁２２の出口（混合）温度が給湯温度設定手段３３で設定された給湯設定温度よりも所定の温度だけ高い温度になるように、貯湯槽５の上部からの湯と中間出湯管２１からの湯の混合割合を調整するために 、中間温度検出手段３２から得られた温度をもとに中間混合弁２２の開度を制御する。さらに、給湯混合弁１９の出口（混合）温度が給湯温度設定手段３３で設定された給湯設定温度になるように、中間混合弁２２からの湯と給水管１７からの水の混合割合を調節するために、給湯温度検出手段３１から得られた温度をもとに、給湯混合弁１９の開度を制御することによって、所定の給湯温度の湯を蛇口１２から給湯する。   First, when the faucet 12 serving as a hot water supply terminal is opened as a hot water supply request, the mixing valve control unit 34 determines that the outlet (mixing) temperature of the intermediate mixing valve 22 is higher than the hot water set temperature set by the hot water supply temperature setting unit 33. In order to adjust the mixing ratio of the hot water from the upper part of the hot water storage tank 5 and the hot water from the intermediate tap pipe 21 so as to reach a higher temperature, the intermediate mixing is performed based on the temperature obtained from the intermediate temperature detecting means 32. The opening degree of the valve 22 is controlled. Further, the mixing ratio of hot water from the intermediate mixing valve 22 and water from the water supply pipe 17 is adjusted so that the outlet (mixing) temperature of the hot water supply mixing valve 19 becomes the hot water supply set temperature set by the hot water supply temperature setting means 33. Therefore, hot water having a predetermined hot water supply temperature is supplied from the faucet 12 by controlling the opening degree of the hot water supply mixing valve 19 based on the temperature obtained from the hot water supply temperature detection means 31.

さらに、風呂加熱要求も同時にあるので、単独風呂加熱モードと同様、利用側循環ポンプ１０を駆動する。そして、制御手段２６は、風呂熱交換器６の熱源側出口温度と風呂熱
交換器６の利用側入口温度との温度差に応じて熱源側循環ポンプ９の回転数を調節することによって、熱源側の温水の流量を制御する。このとき、利用側循環ポンプ１０によって浴槽８から送られてきた水は、熱源側循環ポンプ９によって送られてきた貯湯槽５上部の高温の湯と、風呂熱交換器６で熱交換して加熱されて浴槽８に戻る。 Furthermore, since there is a bath heating request at the same time, the use-side circulation pump 10 is driven as in the single bath heating mode. And the control means 26 adjusts the rotation speed of the heat source side circulation pump 9 according to the temperature difference between the heat source side outlet temperature of the bath heat exchanger 6 and the use side inlet temperature of the bath heat exchanger 6, thereby Control the flow of hot water on the side. At this time, the water sent from the bathtub 8 by the use side circulation pump 10 is heated by exchanging heat with the hot water in the upper part of the hot water tank 5 sent by the heat source side circulation pump 9 in the bath heat exchanger 6. Then return to bathtub 8.

そして、熱源側循環ポンプ９によって貯湯槽５から送られてきた高温の湯は、前述した利用側循環ポンプ１０によって送られてきた浴槽８の湯と、風呂熱交換器６で熱交換して中間出湯管２１との接続個所に至る。そして、この接続箇所に至った湯の全部または一部は、前述したように、中間混合弁２２に送られて貯湯槽５上部からの湯と混合し、さらに、給湯混合弁１９で給水管１７からの水と混合して、所定の給湯温度の湯となって蛇口１２から給湯される。一方、中間出湯管２１との接続個所に至って中間混合弁２２側に流れなかった残りの湯は貯湯槽５に戻る。   Then, the hot water sent from the hot water storage tank 5 by the heat source side circulation pump 9 exchanges heat with the hot water in the bathtub 8 sent by the use side circulation pump 10 described above by the bath heat exchanger 6 and intermediate. It reaches the connection point with the tapping pipe 21. Then, as described above, all or a part of the hot water reaching the connection point is sent to the intermediate mixing valve 22 and mixed with the hot water from the upper part of the hot water tank 5, and the hot water supply mixing valve 19 further supplies the water supply pipe 17. The water is mixed with water from the faucet 12 so as to become hot water having a predetermined hot water supply temperature, and hot water is supplied from the tap 12. On the other hand, the remaining hot water that has reached the connection point with the intermediate hot water discharge pipe 21 and did not flow to the intermediate mixing valve 22 side returns to the hot water storage tank 5.

図７に示す従来のヒートポンプ給湯機であれば、風呂加熱に使用された貯湯槽５の湯はすべて貯湯槽５に戻り、貯湯槽５の湯と混合し、最終的には再度高温に沸き上げていた。しかし、本実施の形態では、風呂加熱に使用された貯湯槽５の湯の一部または全部を直接給湯に使用するため、湯に与えられた熱量をすべて使い切ることになり、効率が大幅に向上する。また、貯湯槽５に戻る湯が少なくなるので、貯湯槽５の湯または水と混合して高温の湯の温度を低下させたり、低温の湯または水の温度を上昇させることも少なくなるので、湯切れや沸き上げの効率低下などが発生し難くなる。   In the case of the conventional heat pump water heater shown in FIG. 7, all the hot water in the hot water tank 5 used for heating the bath returns to the hot water tank 5 and is mixed with the hot water in the hot water tank 5, and finally heated to a high temperature again. It was. However, in this embodiment, part or all of the hot water in the hot water tank 5 used for bath heating is directly used for hot water supply, so all the amount of heat given to the hot water is used up and the efficiency is greatly improved. To do. In addition, since less hot water returns to the hot water tank 5, it is less likely to mix with the hot water or water in the hot water tank 5 to lower the temperature of hot water or to raise the temperature of cold water or water. It becomes difficult for hot water to run out or decrease in boiling efficiency.

上記実施の形態では、混合弁制御手段３４は、給湯温度設定手段３３で設定された給湯設定温度よりも高い温度に設定された目標混合温度になるように中間温度検出手段３２から得られた温度をもとに中間混合弁２２の開度を制御するとしたが、給湯温度設定手段３３で設定された給湯設定温度と風呂熱交換器６の熱源側出口の温度とから決定する方が、更に、風呂加熱に使用された貯湯槽５の湯を有効に使用することができる。   In the above embodiment, the mixing valve control means 34 is the temperature obtained from the intermediate temperature detection means 32 so that the target mixing temperature is set higher than the hot water supply set temperature set by the hot water supply temperature setting means 33. Based on the above, the opening degree of the intermediate mixing valve 22 is controlled. However, it is more preferable to determine from the hot water supply set temperature set by the hot water supply temperature setting means 33 and the temperature of the heat source side outlet of the bath heat exchanger 6. The hot water of the hot water storage tank 5 used for bath heating can be used effectively.

つまり、目標混合温度が、風呂熱交換器６の熱源側出口温度よりも低いと、中間混合弁２２の開度は低温側入口の方向に全開となる。この時、給湯流量が多い場合には、風呂熱交換器６の熱源側の流量制御ができない状態が生じる可能性があるので、中間混合弁２２の目標混合温度は、風呂熱交換器６の熱源側出口温度より高く設定する必要がある。さらに、中間混合弁２２で混合された湯は、給湯混合弁１９の高温側入口に入るので、中間混合弁２２の目標混合温度は、給湯温度設定手段３３で設定された給湯設定温度よりも高くする必要がある。結局、中間混合弁２２の目標混合温度は、給湯温度設定手段３３で設定された給湯設定温度と風呂熱交換器６の熱源側出口温度との内で高い方の温度よりも所定の温度だけ高い温度に設定すればよい。   That is, when the target mixing temperature is lower than the heat source side outlet temperature of the bath heat exchanger 6, the opening of the intermediate mixing valve 22 is fully opened in the direction of the low temperature side inlet. At this time, when the hot water supply flow rate is large, there is a possibility that the flow rate control on the heat source side of the bath heat exchanger 6 cannot be performed, so the target mixing temperature of the intermediate mixing valve 22 is the heat source of the bath heat exchanger 6. It must be set higher than the side outlet temperature. Furthermore, since the hot water mixed by the intermediate mixing valve 22 enters the high temperature side inlet of the hot water supply mixing valve 19, the target mixing temperature of the intermediate mixing valve 22 is higher than the hot water supply set temperature set by the hot water supply temperature setting means 33. There is a need to. Eventually, the target mixing temperature of the intermediate mixing valve 22 is higher by a predetermined temperature than the higher one of the hot water supply set temperature set by the hot water supply temperature setting means 33 and the heat source side outlet temperature of the bath heat exchanger 6. What is necessary is just to set to temperature.

また、同時給湯風呂加熱モードで風呂加熱を行っていると浴槽温度が上昇してきて、浴槽に戻ってくる湯温が高くなってきて、入浴中の人が不快になることがある。これは風呂熱交換器６の熱源側流量が大きく能力が出すぎている場合である。この場合には、風呂熱交換器６の熱源側流量を下げる必要がある。だから、利用側出口温度検出手段２９が所定の温度（例えば６０℃）以上になった場合、混合弁制御手段３４は、中間混合弁２２の目標混合温度を上げるように制御する。このようにすれば、中間混合弁２２の開度は高温側入口の方向に開き、逆に低温側入口は閉じる方向になるので、風呂熱交換器６の熱源側流量が減少して、浴槽に戻ってくる湯温が低くなり、高温の湯が浴槽に戻ることを防止できるので、快適性の向上を図ることができる。   In addition, when bath heating is performed in the simultaneous hot water bath heating mode, the bathtub temperature rises, the temperature of the hot water returning to the bathtub increases, and the person taking the bath may become uncomfortable. This is a case where the heat source side flow rate of the bath heat exchanger 6 is large and the capacity is excessive. In this case, it is necessary to lower the heat source side flow rate of the bath heat exchanger 6. Therefore, when the use side outlet temperature detection means 29 becomes a predetermined temperature (for example, 60 ° C.) or higher, the mixing valve control means 34 controls to increase the target mixing temperature of the intermediate mixing valve 22. In this way, the opening of the intermediate mixing valve 22 opens in the direction of the high temperature side inlet, and conversely, the low temperature side inlet closes, so that the heat source side flow rate of the bath heat exchanger 6 decreases, and the bath enters the bathtub. Since the temperature of returning hot water is lowered and hot water can be prevented from returning to the bathtub, the comfort can be improved.

また、ヒートポンプに用いられる冷媒は、二酸化炭素であるため、貯湯槽５に高温度（およそ９０℃）の湯を貯湯することができるので、湯切れを防止することができ、かつ、高効率化と地球環境保全を図ることができる。   In addition, since the refrigerant used for the heat pump is carbon dioxide, hot water at a high temperature (approximately 90 ° C.) can be stored in the hot water tank 5, so that hot water can be prevented from running out and high efficiency can be achieved. And can protect the global environment.

なお、上記説明では、貯湯槽５の高温湯で風呂加熱する構成としていたが、風呂加熱に限らず、貯湯槽５の熱を利用した暖房や浴室暖房乾燥機などの用途にも適用できる。   In addition, in the said description, it was set as the structure heated by the hot water of the hot water storage tank 5, However, It is applicable not only to bath heating but uses, such as heating using the heat of the hot water storage tank 5, and a bathroom heating dryer.

（実施の形態２）
図２は、本発明の第２の実施の形態におけるヒートポンプ給湯機の構成図である。本実施の形態におけるヒートポンプ給湯機は、風呂熱交換器戻り管２５の途中に流量制御弁３８を設けたもので、他の構成は、上記第１の実施の形態におけるヒートポンプ給湯機と同一なので、同一部分については、同一符号を付してその説明を省略する。 (Embodiment 2)
FIG. 2 is a configuration diagram of a heat pump water heater in the second embodiment of the present invention. The heat pump water heater in the present embodiment is provided with a flow control valve 38 in the middle of the bath heat exchanger return pipe 25, and the other configuration is the same as the heat pump water heater in the first embodiment. About the same part, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

ここでは、熱源側循環ポンプ９と流量制御弁３８とで流量制御手段３０を形成している。そして、制御手段２６と、熱源側循環ポンプ９と、利用側入口温度検出手段２８と、熱源側出口温度検出手段２７及び流量制御弁３８とで、風呂加熱手段２３における熱源側流量を制御することによって風呂熱交換器６での加熱能力を制御する。   Here, the heat source side circulation pump 9 and the flow rate control valve 38 form a flow rate control means 30. The control means 26, the heat source side circulation pump 9, the use side inlet temperature detection means 28, the heat source side outlet temperature detection means 27, and the flow rate control valve 38 control the heat source side flow rate in the bath heating means 23. To control the heating capacity in the bath heat exchanger 6.

以上のように構成されたヒートポンプ給湯機について、以下にその動作、作用を説明する。   About the heat pump water heater comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

なお、給湯加熱モード、単独給湯モード、中間給湯モード、風呂注湯モード、単独風呂加熱モードについては、上記第１の実施の形態と同じなので説明は省略し、給湯要求と風呂加熱要求とが同時にあった場合の同時給湯風呂加熱モードについて説明する。   Note that the hot water supply heating mode, the single hot water supply mode, the intermediate hot water supply mode, the bath pouring mode, and the single bath heating mode are the same as those in the first embodiment, so the description thereof is omitted, and the hot water supply request and the bath heating request are simultaneously performed. The simultaneous hot water bath heating mode will be described.

この場合、給湯混合弁１９の制御は、単独給湯モードの場合と同じである。制御手段２６は、先ず、流量制御弁３８を初期開度（例えば、全開）に設定する。そして、熱源側循環ポンプ９の流量の制御を行う。つまり、風呂熱交換器６の熱源側出口温度と風呂熱交換器６の利用側入口温度との温度差に応じて熱源側の温水の流量を制御する。   In this case, the control of the hot water supply mixing valve 19 is the same as that in the single hot water supply mode. First, the control means 26 sets the flow control valve 38 to an initial opening (for example, fully open). Then, the flow rate of the heat source side circulation pump 9 is controlled. That is, the flow rate of hot water on the heat source side is controlled according to the temperature difference between the heat source side outlet temperature of the bath heat exchanger 6 and the use side inlet temperature of the bath heat exchanger 6.

さらに、混合弁制御手段３４は、給湯温度設定手段３３で設定された給湯設定温度よりも高い温度に設定された目標混合温度になるように、中間温度検出手段３２から得られた温度をもとに、中間混合弁２２の開度を制御する。しかし、給湯流量が多くなってくると熱源側循環ポンプ９だけでは、風呂熱交換器６の熱源側流量を制御できなくなる場合がある。すなわち、熱源側循環ポンプ９の回転数を最小回転数または停止しても、熱源側流量が大きくなりすぎて、風呂熱交換器６の熱源側出口温度と風呂熱交換器６の利用側入口温度との温度差を目標の温度差に制御できなくなる場合である。   Furthermore, the mixing valve control means 34 is based on the temperature obtained from the intermediate temperature detection means 32 so that the target mixing temperature is set higher than the hot water supply set temperature set by the hot water supply temperature setting means 33. In addition, the opening degree of the intermediate mixing valve 22 is controlled. However, when the hot water supply flow rate increases, the heat source side flow rate of the bath heat exchanger 6 may not be controlled only by the heat source side circulation pump 9. That is, even if the rotation speed of the heat source side circulation pump 9 is the minimum rotation speed or stopped, the heat source side flow rate becomes too large, and the heat source side outlet temperature of the bath heat exchanger 6 and the use side inlet temperature of the bath heat exchanger 6 This is a case where it becomes impossible to control the temperature difference with the target temperature difference.

このような場合には、流量制御弁３８の開度を絞り、熱源側の流量を小さくする。すなわち、制御手段２６が、風呂熱交換器６の熱源側出口温度と風呂熱交換器６の利用側入口温度との温度差を目標の温度差になるように熱源側循環ポンプ９の回転数を制御し、その結果、熱源側循環ポンプ９の回転数を最小回転数または停止しても、前記温度差が目標の温度差より大きい所定の温度差になれば、流量制御弁３８の開度を制御することによって、前記温度差を目標の温度差に制御する。   In such a case, the opening degree of the flow control valve 38 is reduced to reduce the flow rate on the heat source side. That is, the control means 26 sets the rotation speed of the heat source side circulation pump 9 so that the temperature difference between the heat source side outlet temperature of the bath heat exchanger 6 and the use side inlet temperature of the bath heat exchanger 6 becomes a target temperature difference. As a result, even if the rotation speed of the heat source side circulation pump 9 is reduced to the minimum rotation speed or stopped, if the temperature difference becomes a predetermined temperature difference larger than the target temperature difference, the opening degree of the flow control valve 38 is increased. By controlling, the temperature difference is controlled to a target temperature difference.

逆に、流量制御弁３８の開度が全開になっても、前記温度差が目標の温度差より小さい所定の温度差になれば、熱源側循環ポンプ９の回転数で前記温度差を目標の温度差になるように制御する。   On the contrary, even if the opening degree of the flow control valve 38 is fully opened, if the temperature difference becomes a predetermined temperature difference smaller than the target temperature difference, the temperature difference is set to the target by the number of rotations of the heat source side circulation pump 9. Control the temperature difference.

なお、上記実施の形態では、流量制御弁３８を風呂熱交換器戻り管の２５の途中に設けたが、中間出湯管２１と風呂熱交換器戻り管２５の接続位置よりも上流側の中間出湯管２１に流量制御弁３８を設けても同様の効果が得られる。   In the above embodiment, the flow control valve 38 is provided in the middle of the bath heat exchanger return pipe 25, but the intermediate hot water upstream of the connection position of the intermediate hot water pipe 21 and the bath heat exchanger return pipe 25. Even if the flow control valve 38 is provided on the pipe 21, the same effect can be obtained.

このようにすれば、給湯流量が多い場合や変動した場合でも、風呂加熱に使用された貯湯槽５の湯の一部または全部を直接給湯に使用することによって効率向上を図りつつ、効率よい安定した信頼性の高い風呂加熱を実現することができる。   In this way, even when the hot water flow rate is large or fluctuates, efficient or stable while improving efficiency by directly or partially using the hot water of the hot water storage tank 5 used for bath heating. Highly reliable bath heating can be realized.

（実施の形態３）
図３は、本発明の第３の実施の形態におけるヒートポンプ給湯機の構成図である。本実施の形態におけるヒートポンプ給湯機は、風呂熱交換器戻り管２５と中間出湯管２１との接続位置よりも貯湯槽５側の中間出湯管２１の途中に前記貯湯槽５方向の流れを防止する流入防止手段３９を設けたもので、他の構成は、上記第１の実施の形態におけるヒートポンプ給湯機と同一なので、同一部分については、同一符号を付してその説明を省略する。 (Embodiment 3)
FIG. 3 is a configuration diagram of a heat pump water heater in the third embodiment of the present invention. The heat pump water heater in the present embodiment prevents the flow in the hot water storage tank 5 in the middle of the intermediate hot water pipe 21 closer to the hot water tank 5 than the connection position between the bath heat exchanger return pipe 25 and the intermediate hot water pipe 21. Since the inflow prevention means 39 is provided and the other configuration is the same as that of the heat pump water heater in the first embodiment, the same portions are denoted by the same reference numerals and the description thereof is omitted.

以上のように構成された本実施の形態におけるヒートポンプ給湯機について、以下にその動作、作用を説明する。   About the heat pump water heater in this Embodiment comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

なお、給湯加熱モード、単独給湯モード、風呂注湯モード、単独風呂加熱モードについては、上記第１の実施の形態と同じなので説明は省略し、中間給湯モードと給湯要求と風呂加熱要求とが同時にあった場合の同時給湯風呂加熱モードについて説明する。   Note that the hot water supply heating mode, the single hot water supply mode, the bath pouring mode, and the single bath heating mode are the same as those in the first embodiment, and the description thereof will be omitted. The intermediate hot water supply mode, the hot water supply request, and the bath heating request are simultaneously performed. The simultaneous hot water bath heating mode will be described.

まず、中間給湯モードについて説明する。 この場合、流入防止手段３９で流路を開ける。後の動作、作用は、第１の実施の形態と同様なので、説明は省略する。   First, the intermediate hot water supply mode will be described. In this case, the flow path is opened by the inflow prevention means 39. Since the subsequent operations and actions are the same as those in the first embodiment, description thereof is omitted.

次に、同時給湯風呂加熱モードについて説明する。この場合、流入防止手段３９で流路を閉じる。そして、第１の実施の形態と同様に、給湯要求として給湯端末である蛇口１２が開かれると、混合弁制御手段３４は、中間混合弁２２の出口（混合）温度が、給湯温度設定手段３３で設定された給湯設定温度よりも所定の温度だけ高い温度になるように、貯湯槽５の上部からの湯と中間出湯管２１からの湯の混合割合を調整するために 、中間温度検出手段３２から得られた温度をもとに、中間混合弁２２の開度を制御する。   Next, the simultaneous hot water bath heating mode will be described. In this case, the flow path is closed by the inflow prevention means 39. Then, as in the first embodiment, when the faucet 12 that is a hot water supply terminal is opened as a hot water supply request, the mixing valve control means 34 determines that the outlet (mixing) temperature of the intermediate mixing valve 22 is the hot water supply temperature setting means 33. In order to adjust the mixing ratio of the hot water from the upper part of the hot water storage tank 5 and the hot water from the intermediate tap pipe 21 so as to be a predetermined temperature higher than the hot water supply set temperature set in step 1, the intermediate temperature detecting means 32 The opening degree of the intermediate mixing valve 22 is controlled based on the temperature obtained from the above.

さらに、給湯混合弁１９の出口（混合）温度が、給湯温度設定手段３３で設定された給湯設定温度になるように、中間混合弁２２からの湯と給水管１７からの水の混合割合を調節するために、給湯温度検出手段３１から得られた温度をもとに給湯混合弁１９の開度を制御することによって、所定の給湯温度の湯を蛇口１２から給湯する。さらに、風呂加熱要求も同時にあるので、単独風呂加熱モードと同様、利用側循環ポンプ１０を駆動する。   Further, the mixing ratio of hot water from the intermediate mixing valve 22 and water from the water supply pipe 17 is adjusted so that the outlet (mixing) temperature of the hot water supply mixing valve 19 becomes the hot water supply set temperature set by the hot water supply temperature setting means 33. In order to do this, hot water having a predetermined hot water temperature is supplied from the tap 12 by controlling the opening of the hot water mixing valve 19 based on the temperature obtained from the hot water temperature detector 31. Furthermore, since there is a bath heating request at the same time, the use-side circulation pump 10 is driven as in the single bath heating mode.

そして、制御手段２６は、風呂熱交換器６の熱源側出口温度と風呂熱交換器６の利用側入口温度との温度差に応じて熱源側循環ポンプ９の回転数を調節することによって、熱源側の温水の流量を制御する。   And the control means 26 adjusts the rotation speed of the heat source side circulation pump 9 according to the temperature difference between the heat source side outlet temperature of the bath heat exchanger 6 and the use side inlet temperature of the bath heat exchanger 6, thereby Control the flow of hot water on the side.

このとき、利用側循環ポンプ１０によって浴槽８から送られてきた水は、熱源側循環ポンプ９によって送られてきた貯湯槽５上部の高温の湯と、風呂熱交換器６で熱交換して加熱されて浴槽８に戻る。そして、熱源側循環ポンプ９によって貯湯槽５から送られてきた高温の湯は、前述した利用側循環ポンプ１０によって送られてきた浴槽８の湯と、風呂熱交換器６で熱交換して中間出湯管２１との接続個所に至る。そして、流入防止手段３９で貯湯槽５側への流入が防止されているので、この接続箇所に至ったすべての湯が中間混合弁２２に送られて貯湯槽５上部からの湯と混合し、さらに、給湯混合弁１９で給水管１７からの水と混合して、所定の給湯温度の湯となって蛇口１２から給湯される。   At this time, the water sent from the bathtub 8 by the use side circulation pump 10 is heated by exchanging heat with the hot water in the upper part of the hot water tank 5 sent by the heat source side circulation pump 9 in the bath heat exchanger 6. Then return to bathtub 8. Then, the hot water sent from the hot water storage tank 5 by the heat source side circulation pump 9 exchanges heat with the hot water in the bathtub 8 sent by the use side circulation pump 10 described above by the bath heat exchanger 6 and intermediate. It reaches the connection point with the tapping pipe 21. And since the inflow to the hot water tank 5 side is prevented by the inflow prevention means 39, all the hot water that has reached this connection location is sent to the intermediate mixing valve 22 and mixed with the hot water from the upper part of the hot water tank 5, Further, it is mixed with water from the water supply pipe 17 by the hot water supply mixing valve 19 to become hot water having a predetermined hot water supply temperature, and hot water is supplied from the faucet 12.

以上のように、風呂加熱に使用された貯湯槽５の湯のすべてを直接給湯に使用するため、湯に与えられた熱量をすべて使い切ることになり、効率が大幅に向上する。また、貯湯槽５に戻る湯がなくなるので、貯湯槽５の湯または水と混合して湯の温度を低下させたり
、水の温度を上昇させることもないので、湯切れや沸き上げの効率が低下することが無い。 As described above, since all of the hot water in the hot water storage tank 5 used for bath heating is directly used for hot water supply, all the amount of heat given to the hot water is used up, and the efficiency is greatly improved. In addition, since there is no hot water returning to the hot water tank 5, the hot water in the hot water tank 5 or mixed with the water does not lower the temperature of the hot water or raise the temperature of the water. There is no decline.

なお、上記第２の実施の形態で述べた流量制御弁３８を備え、熱源側循環ポンプ９と流量制御弁３８とで流量制御手段３０を形成して、制御手段２６と熱源側循環ポンプ９と利用側入口温度検出手段２８と熱源側出口温度検出手段２７及び流量制御弁３８とで、風呂加熱手段２３における熱源側流量を制御することにしても、同様の作用、効果が得られる。   The flow rate control valve 38 described in the second embodiment is provided, and the heat source side circulation pump 9 and the flow rate control valve 38 form a flow rate control means 30. The control means 26, the heat source side circulation pump 9, Even if the heat source side flow rate in the bath heating unit 23 is controlled by the use side inlet temperature detection unit 28, the heat source side outlet temperature detection unit 27, and the flow rate control valve 38, the same operation and effect can be obtained.

さらに、図４に示すように、注湯混合弁３５の高温側入口を貯湯槽５の上部でなく、中間混合弁２２の混合（出口）側に接続しても良い。すなわち、浴槽８への差し湯などの要求と風呂の加熱要求とが同時にあった場合、混合弁制御手段３４は、中間混合弁２２の出口（混合）温度がリモコン（図示せず）などで設定した所定の注湯温度よりも所定の温度だけ高い温度になるように、貯湯槽５の上部からの湯と中間出湯管２１からの湯の混合割合を調整するために 、中間温度検出手段３２から得られた温度をもとに中間混合弁２２の開度を制御する。さらに、注湯混合弁３５の出口（混合）温度が前記所定の注湯温度になるように、中間混合弁２２からの湯と給水管１７からの水の混合割合を調節するために、注湯温度検出手段３７から得られた温度をもとに注湯混合弁３５の開度を制御することによって、所定の注湯温度の湯を浴槽８に注湯する。なお、風呂加熱手段２３の動作と作用は、図３の場合と同様なので説明は省略する。   Further, as shown in FIG. 4, the high temperature side inlet of the hot water mixing valve 35 may be connected to the mixing (outlet) side of the intermediate mixing valve 22 instead of the upper part of the hot water storage tank 5. That is, when there is a request for hot water to the bathtub 8 and a bath heating request at the same time, the mixing valve control means 34 sets the outlet (mixing) temperature of the intermediate mixing valve 22 with a remote controller (not shown). In order to adjust the mixing ratio of the hot water from the upper part of the hot water storage tank 5 and the hot water from the intermediate tapping pipe 21 so that the temperature is higher than the predetermined pouring temperature by the predetermined temperature, the intermediate temperature detecting means 32 The opening degree of the intermediate mixing valve 22 is controlled based on the obtained temperature. Further, in order to adjust the mixing ratio of the hot water from the intermediate mixing valve 22 and the water from the water supply pipe 17 so that the outlet (mixing) temperature of the hot water mixing valve 35 becomes the predetermined hot water temperature, Hot water of a predetermined pouring temperature is poured into the bathtub 8 by controlling the opening of the pouring mixing valve 35 based on the temperature obtained from the temperature detection means 37. In addition, since the operation | movement and effect | action of the bath heating means 23 are the same as that of the case of FIG. 3, description is abbreviate | omitted.

このようにすれば、風呂熱交換器６で放熱した貯湯槽５上部からの湯の一部または全部を直接風呂の差し湯などに利用できるため、湯切れの可能性が少なくなり、快適性と利便性の向上と、風呂熱交換器６から戻る中温水と貯湯槽５の湯との混合による中温水の生成が少なくなるので運転効率の向上とを図ることができる。   In this way, a part or all of the hot water from the upper part of the hot water storage tank 5 radiated by the bath heat exchanger 6 can be used directly for the hot water of the bath, etc. It is possible to improve convenience and improve operation efficiency because the production of intermediate warm water by mixing the intermediate warm water returning from the bath heat exchanger 6 and the hot water in the hot water storage tank 5 is reduced.

（実施の形態４）
図５は、本発明の第４の実施の形態におけるヒートポンプ給湯機の構成図である。 (Embodiment 4)
FIG. 5 is a configuration diagram of a heat pump water heater in the fourth embodiment of the present invention.

本実施の形態におけるヒートポンプ給湯機と、図１に示す第１の実施の形態におけるヒートポンプ給湯機と異なるところは、図５に示すように、風呂熱交換器６に接続された風呂熱交換器戻り管２５を貯湯槽５に接続し、また、この接続位置を中間出湯管２１と貯湯槽５との接続位置と異なる位置としたことである。さらに、中間出湯管２１の途中と風呂熱交換器戻り管２５の途中とを接続するバイパス管４０と、風呂熱交換器６で熱交換した貯湯槽５上部の湯の経路を中間出湯管２１側か風呂熱交換器戻り管２５と貯湯槽５との接続部側かを選択して切り換える切り換え手段４１とを備えたもので、他の構成は、上記第１の実施の形態におけるヒートポンプ給湯機と同一なので、同一部分については、同一符号を付してその説明を省略する。   The difference between the heat pump water heater in the present embodiment and the heat pump water heater in the first embodiment shown in FIG. 1 is that the bath heat exchanger connected to the bath heat exchanger 6 is returned as shown in FIG. The pipe 25 is connected to the hot water tank 5, and the connection position is set to a position different from the connection position between the intermediate hot water pipe 21 and the hot water tank 5. Furthermore, a bypass pipe 40 connecting the middle of the intermediate hot water pipe 21 and the middle of the bath heat exchanger return pipe 25, and the hot water path in the upper part of the hot water storage tank 5 exchanged by the bath heat exchanger 6 are connected to the intermediate hot water pipe 21 side. And a switching means 41 for selecting and switching the connection portion between the bath heat exchanger return pipe 25 and the hot water storage tank 5, and the other configuration is the same as the heat pump water heater in the first embodiment. Since they are the same, the same parts are denoted by the same reference numerals and description thereof is omitted.

以上のように構成されたヒートポンプ給湯機について、以下にその動作、作用を説明する。なお、給湯加熱モード、単独給湯モード、風呂注湯モードについては、図１の第１の実施の形態と同じなので説明は省略し、単独風呂加熱モードと給湯要求と風呂加熱要求とが同時にあった場合の同時給湯風呂加熱モードとについて説明する。   About the heat pump water heater comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. Since the hot water supply heating mode, the single hot water supply mode, and the bath pouring mode are the same as those in the first embodiment of FIG. 1, the description is omitted, and the single bath heating mode, the hot water supply request, and the bath heating request are simultaneously provided. The simultaneous hot water bath heating mode will be described.

まず、単独風呂加熱モードについて説明する。いま、風呂の加熱要求（図示せず）があると、利用側循環ポンプ１０を駆動し、切り換え手段４１を貯湯槽５側に通じるように切り換える。そして、制御手段２６は、熱源側循環ポンプ９を駆動する。   First, the single bath heating mode will be described. Now, when there is a bath heating request (not shown), the use-side circulation pump 10 is driven to switch the switching means 41 to the hot water tank 5 side. Then, the control means 26 drives the heat source side circulation pump 9.

利用側循環ポンプ１０によって浴槽８から送られてきた水は、熱源側循環ポンプ９によって送られてきた貯湯槽５上部の高温の湯と、風呂熱交換器６で熱交換して加熱されて浴
槽８に戻る。また、熱源側循環ポンプ９によって貯湯槽５から送られてきた高温の湯は、前述した利用側循環ポンプ１０によって送られてきた浴槽８の湯と、風呂熱交換器６で熱交換した後、切り換え手段４１を通って貯湯槽５に戻る。このとき、前述したように、制御手段２６は、必要な能力で効率よく風呂加熱するために、熱源側循環ポンプ９の流量を制御する。 The water sent from the bathtub 8 by the use side circulation pump 10 is heated by exchanging heat with the hot water in the upper part of the hot water tank 5 sent by the heat source side circulation pump 9 in the bath heat exchanger 6. Return to 8. In addition, the hot water sent from the hot water storage tank 5 by the heat source side circulation pump 9 exchanges heat with the hot water in the bathtub 8 sent by the use side circulation pump 10 and the bath heat exchanger 6. It returns to the hot water tank 5 through the switching means 41. At this time, as described above, the control means 26 controls the flow rate of the heat source side circulation pump 9 in order to efficiently heat the bath with the necessary capacity.

次に、給湯要求と風呂加熱要求とが同時にあった場合の同時給湯風呂加熱モードについて説明する。まず、給湯要求として給湯端末である蛇口１２が開かれると混合弁制御手段３４は、中間混合弁２２の出口（混合）温度が給湯温度設定手段３３で設定された給湯設定温度よりも所定の温度だけ高い温度になるように、貯湯槽５の上部からの湯と中間出湯管２１からの湯の混合割合を調整するために 、中間温度検出手段３２から得られた温度をもとに中間混合弁２２の開度を制御する。   Next, the simultaneous hot water bath heating mode when there is a hot water request and a bath heating request will be described. First, when the faucet 12 serving as a hot water supply terminal is opened as a hot water supply request, the mixing valve control means 34 sets the outlet (mixing) temperature of the intermediate mixing valve 22 to a predetermined temperature than the hot water supply set temperature set by the hot water supply temperature setting means 33. In order to adjust the mixing ratio of the hot water from the upper part of the hot water storage tank 5 and the hot water from the intermediate tap pipe 21 so as to reach a high temperature only, the intermediate mixing valve based on the temperature obtained from the intermediate temperature detecting means 32 The opening degree of 22 is controlled.

さらに、給湯混合弁１９の出口（混合）温度が給湯温度設定手段３３で設定された給湯設定温度になるように、中間混合弁２２からの湯と給水管１７からの水の混合割合を調節するために、給湯温度検出手段３１から得られた温度をもとに給湯混合弁１９の開度を制御することによって、所定の給湯温度の湯を蛇口１２から給湯する。   Further, the mixing ratio of hot water from the intermediate mixing valve 22 and water from the water supply pipe 17 is adjusted so that the outlet (mixing) temperature of the hot water supply mixing valve 19 becomes the hot water supply set temperature set by the hot water supply temperature setting means 33. Therefore, hot water having a predetermined hot water temperature is supplied from the faucet 12 by controlling the opening degree of the hot water mixing valve 19 based on the temperature obtained from the hot water temperature detecting means 31.

さらに、風呂加熱要求も同時にあるので、利用側循環ポンプ１０を駆動し、切り換え手段４１を中間出湯管２１側に通じるように切り換える。そして、制御手段２６は、風呂熱交換器６の熱源側出口温度と風呂熱交換器６の利用側入口温度との温度差に応じて熱源側循環ポンプ９の回転数を調節することによって、熱源側の温水の流量を制御する。   Furthermore, since there is a bath heating request at the same time, the use-side circulation pump 10 is driven to switch the switching means 41 so as to communicate with the intermediate hot water discharge pipe 21 side. And the control means 26 adjusts the rotation speed of the heat source side circulation pump 9 according to the temperature difference between the heat source side outlet temperature of the bath heat exchanger 6 and the use side inlet temperature of the bath heat exchanger 6, thereby Control the flow of hot water on the side.

このとき、利用側循環ポンプ１０によって浴槽８から送られてきた水は、熱源側循環ポンプ９によって送られてきた貯湯槽５上部の高温の湯と、風呂熱交換器６で熱交換して加熱されて浴槽８に戻る。   At this time, the water sent from the bathtub 8 by the use side circulation pump 10 is heated by exchanging heat with the hot water in the upper part of the hot water tank 5 sent by the heat source side circulation pump 9 in the bath heat exchanger 6. Then return to bathtub 8.

そして、熱源側循環ポンプ９によって貯湯槽５から送られてきた高温の湯は、前述した利用側循環ポンプ１０によって送られてきた浴槽８の湯と、風呂熱交換器６で熱交換した後、切り換え手段４１を通って、バイパス管４０と中間出湯管２１との接続個所に至る。そして、この接続箇所に至った湯の全部または一部は、中間混合弁２２に送られて貯湯槽５上部からの湯と混合し、さらに、給湯混合弁１９で給水管１７からの水と混合して、所定の給湯温度の湯となって蛇口１２から給湯される。   And after exchanging heat with the hot water of the bathtub 8 sent by the utilization side circulation pump 10 and the hot water sent from the hot water storage tank 5 by the heat source side circulation pump 9 in the bath heat exchanger 6, It passes through the switching means 41 and reaches the connection point between the bypass pipe 40 and the intermediate hot water pipe 21. Then, all or a part of the hot water reaching the connection point is sent to the intermediate mixing valve 22 to be mixed with hot water from the upper part of the hot water storage tank 5 and further mixed with water from the water supply pipe 17 by the hot water supply mixing valve 19. Then, the hot water is supplied from the faucet 12 as hot water having a predetermined hot water temperature.

一方、バイパス管４０と中間出湯管２１との接続個所に至って中間混合弁２２側に流れなかった残りの湯は貯湯槽５に戻る。   On the other hand, the remaining hot water that has reached the connection point between the bypass pipe 40 and the intermediate hot water discharge pipe 21 and did not flow to the intermediate mixing valve 22 side returns to the hot water storage tank 5.

このようにすれば、風呂加熱時の貯湯槽５への戻り位置と中間出湯時の貯湯槽５からの取り出し位置とが独立して互いに影響されないので、それぞれ効率の良い中間出湯と風呂加熱ができ、かつ、給湯要求と風呂加熱要求が同時にあった場合、風呂熱交換器６で放熱した貯湯槽５上部からの湯を貯湯槽５に戻さず給湯端末に流して利用するので、快適性と利便性の向上と、かつ、運転効率の向上を図ることができる。   In this way, the return position to the hot water tank 5 at the time of bath heating and the take-out position from the hot water tank 5 at the time of intermediate hot water are not influenced by each other, so that efficient intermediate hot water and bath heating can be performed respectively. And when there is a hot water supply request and a bath heating request at the same time, the hot water from the upper part of the hot water storage tank 5 radiated by the bath heat exchanger 6 is used without flowing back to the hot water storage tank 5 and is used for comfort and convenience. Improvement of driving performance and driving efficiency can be achieved.

なお、図５に示すように、図２の第２の実施の形態で述べた流量制御弁３８を設け、熱源側循環ポンプ９と流量制御弁３８とで流量制御手段３０を形成すれば、第２の実施の形態で述べたような効果も得られる。   As shown in FIG. 5, if the flow rate control valve 38 described in the second embodiment of FIG. 2 is provided and the flow rate control means 30 is formed by the heat source side circulation pump 9 and the flow rate control valve 38, The effects described in the second embodiment can also be obtained.

さらに、図３の第３の実施の形態で述べた流入防止手段３９を、中間出湯管２１とバイパス管４０との接続箇所よりも貯湯槽５側の中間出湯管２１の途中に設けても第３の実施の形態で述べたような効果も得られる。   Furthermore, even if the inflow preventing means 39 described in the third embodiment in FIG. 3 is provided in the middle of the intermediate hot water pipe 21 closer to the hot water storage tank 5 than the connection point between the intermediate hot water pipe 21 and the bypass pipe 40, The effects described in the third embodiment can also be obtained.

また、図５では、風呂熱交換器戻り管２５と貯湯槽５との接続位置を、中間出湯管２１と貯湯槽５との接続位置よりも下部にしているが、中間出湯管２１と貯湯槽５との接続位置よりも上部か同じ高さにしても同様の作用、効果が得られる。   In FIG. 5, the connection position between the bath heat exchanger return pipe 25 and the hot water tank 5 is lower than the connection position between the intermediate hot water pipe 21 and the hot water tank 5, but the intermediate hot water pipe 21 and the hot water tank. Even if it is above or at the same height as the connection position with 5, the same action and effect can be obtained.

さらに、図６に示すように、注湯混合弁３５の高温側入口を貯湯槽５の上部でなく、中間混合弁２２の混合（出口）側に接続しても良い。すなわち、浴槽８への差し湯などの要求と風呂の加熱要求とが同時にあった場合、混合弁制御手段３４は、中間混合弁２２の出口（混合）温度がリモコン（図示せず）などで設定した所定の注湯温度よりも所定の温度だけ高い温度になるように、貯湯槽５の上部からの湯と中間出湯管２１からの湯の混合割合を調整するために 、中間温度検出手段３２から得られた温度をもとに中間混合弁２２の開度を制御する。   Further, as shown in FIG. 6, the high temperature side inlet of the hot water mixing valve 35 may be connected to the mixing (outlet) side of the intermediate mixing valve 22 instead of the upper part of the hot water tank 5. That is, when there is a request for hot water to the bathtub 8 and a bath heating request at the same time, the mixing valve control means 34 sets the outlet (mixing) temperature of the intermediate mixing valve 22 with a remote controller (not shown). In order to adjust the mixing ratio of the hot water from the upper part of the hot water storage tank 5 and the hot water from the intermediate tapping pipe 21 so that the temperature is higher than the predetermined pouring temperature by the predetermined temperature, the intermediate temperature detecting means 32 The opening degree of the intermediate mixing valve 22 is controlled based on the obtained temperature.

さらに、注湯混合弁３５の出口（混合）温度が、前記所定の注湯温度になるように、中間混合弁２２からの湯と給水管１７からの水の混合割合を調節するために、注湯温度検出手段３７から得られた温度をもとに注湯混合弁３５の開度を制御することによって、所定の注湯温度の湯を浴槽８に注湯する。   Further, in order to adjust the mixing ratio of hot water from the intermediate mixing valve 22 and water from the water supply pipe 17 so that the outlet (mixing) temperature of the hot water mixing valve 35 becomes the predetermined pouring temperature. Hot water having a predetermined pouring temperature is poured into the bathtub 8 by controlling the opening of the pouring mixing valve 35 based on the temperature obtained from the hot water temperature detecting means 37.

なお、風呂加熱手段２３の動作と作用は、図５の場合と同様なので説明は省略する。このようにすれば、風呂熱交換器６で放熱した貯湯槽５上部からの湯の一部または全部を直接風呂の差し湯などに利用できるため、湯切れの可能性を少なくし、快適性と利便性の向上と、風呂熱交換器６から戻る中温水と貯湯槽５の湯との混合による中温水の生成が少なくなるので運転効率の向上とを図ることができる。   In addition, since the operation | movement and effect | action of the bath heating means 23 are the same as that of the case of FIG. 5, description is abbreviate | omitted. In this way, a part or all of the hot water from the upper part of the hot water tank 5 radiated by the bath heat exchanger 6 can be used directly for the hot water of the bath, etc. It is possible to improve convenience and improve operation efficiency because the production of intermediate warm water by mixing the intermediate warm water returning from the bath heat exchanger 6 and the hot water in the hot water storage tank 5 is reduced.

以上のように、本発明にかかるヒートポンプ給湯機は、貯湯槽の高温湯で浴槽などの放熱手段を加熱した後の温度低下した湯を直接給湯に使用する構成としているため、湯切れの防止と運転効率の向上を図ることができるもので、風呂加熱に限らず、貯湯熱を利用した暖房や浴室暖房乾燥機などの用途にも適用できる。   As described above, the heat pump water heater according to the present invention is configured to directly use hot water whose temperature has decreased after heating a heat radiating means such as a bathtub with high-temperature hot water in a hot water tank for hot water supply. It is possible to improve the operation efficiency, and is applicable not only to bath heating but also to applications such as heating using stored hot water and bathroom heating dryer.

本発明の第１の実施の形態におけるヒートポンプ給湯機の構成図The block diagram of the heat pump water heater in the 1st Embodiment of this invention 本発明の第２の実施の形態におけるヒートポンプ給湯機の構成図The block diagram of the heat pump water heater in the 2nd Embodiment of this invention 本発明の第３の実施の形態におけるヒートポンプ給湯機の構成図The block diagram of the heat pump water heater in the 3rd Embodiment of this invention 本発明の第３の実施の形態における他の実施例を示すヒートポンプ給湯機の構成図The block diagram of the heat pump water heater which shows the other Example in the 3rd Embodiment of this invention. 本発明の第４の実施の形態におけるヒートポンプ給湯機の構成図The block diagram of the heat pump water heater in the 4th Embodiment of this invention 本発明の第４の実施の形態における他の実施例を示すヒートポンプ給湯機の構成図The block diagram of the heat pump water heater which shows the other Example in the 4th Embodiment of this invention. 従来のヒートポンプ給湯機の構成図Configuration diagram of conventional heat pump water heater

符号の説明Explanation of symbols

１ 圧縮機
２ 給湯熱交換器
５ 貯湯槽
６ 風呂熱交換器
８ 浴槽
１７ 給水管
１８ 出湯管
１９ 給湯混合弁（混合弁）
２１ 中間出湯管
２２ 中間混合弁（混合弁）
２３ 風呂加熱手段
２４ 風呂熱交換器往き管
２５ 風呂熱交換器戻り管
３０ 流量制御手段
３３ 給湯温度設定手段 DESCRIPTION OF SYMBOLS 1 Compressor 2 Hot water supply heat exchanger 5 Hot water storage tank 6 Bath heat exchanger 8 Bathtub 17 Water supply pipe 18 Hot water supply pipe 19 Hot water supply mixing valve (mixing valve)
21 Intermediate tap pipe 22 Intermediate mixing valve (mixing valve)
23 Bath Heating Means 24 Bath Heat Exchanger Outgoing Pipe 25 Bath Heat Exchanger Return Pipe 30 Flow Control Means 33 Hot Water Supply Temperature Setting Means

Claims (10)

圧縮機、給湯熱交換器を備えた給湯加熱手段と、前記給湯熱交換器で加熱された温水を貯湯する貯湯槽と、前記貯湯槽の上部に接続された出湯管と、前記貯湯槽の中間部に接続された中間出湯管と、前記貯湯槽の下部に接続された給水管と、風呂熱交換器を途中に設けて前記貯湯槽の上部と前記上部よりも下部とをそれぞれ接続するための風呂熱交換器往き管と風呂熱交換器戻り管とを具備し前記貯湯槽上部の湯を熱源として前記風呂熱交換器を介して浴槽の湯水を加熱する風呂加熱手段と、前記風呂加熱手段を循環する熱源流量を制御する流量制御手段と、給湯温度を設定する給湯温度設定手段と、前記出湯管と前記中間出湯管および前記給水管からの湯水を混合して前記給湯温度設定手段で設定された給湯温度になるように調整する複数の混合弁とを備え、給湯要求と風呂加熱要求とが同時にあった場合、前記風呂熱交換器で放熱した前記貯湯槽上部からの湯の一部または全部を直接給湯に利用するようにしたことを特徴とするヒートポンプ給湯機。 A hot water supply heating means provided with a compressor, a hot water supply heat exchanger, a hot water storage tank for storing hot water heated by the hot water supply heat exchanger, a hot water pipe connected to an upper part of the hot water storage tank, and an intermediate between the hot water storage tanks An intermediate hot water pipe connected to the section, a water supply pipe connected to the lower part of the hot water tank, and a bath heat exchanger provided in the middle to connect the upper part of the hot water tank and the lower part of the upper part, respectively A bath heating means comprising a bath heat exchanger forward pipe and a bath heat exchanger return pipe, the bath heating means for heating hot water in the bathtub through the bath heat exchanger using the hot water in the upper part of the hot water storage tank as a heat source, and the bath heating means, Flow rate control means for controlling the circulating heat source flow rate, hot water supply temperature setting means for setting hot water supply temperature, hot water from the hot water pipe, the intermediate hot water pipe and the hot water pipe are mixed and set by the hot water supply temperature setting means. Multiple to adjust to the hot water temperature When a hot water supply request and a bath heating request are simultaneously provided, a part or all of the hot water from the upper part of the hot water tank radiated by the bath heat exchanger is directly used for hot water supply. A heat pump water heater that is characterized. 一端が風呂熱交換器に接続された風呂熱交換器戻り管の他端を、中間出湯管の途中に接続したことを特徴とする請求項１に記載のヒートポンプ給湯機。 The heat pump water heater according to claim 1, wherein the other end of the bath heat exchanger return pipe, one end of which is connected to the bath heat exchanger, is connected in the middle of the intermediate hot water pipe. 風呂熱交換器に接続された風呂熱交換器戻り管と貯湯槽との接続部と、中間出湯管と前記貯湯槽との接続部とを異なる位置とし、前記中間出湯管と前記風呂熱交換器戻り管とを接続するバイパス管と、前記風呂熱交換器で熱交換した前記貯湯槽の上部の湯の経路を中間出湯管側か前記風呂熱交換器戻り管と前記貯湯槽との接続部側かを選択して切り換える切り換え手段とを備えたことを特徴とする請求項１に記載のヒートポンプ給湯機。 A connection portion between the bath heat exchanger return pipe connected to the bath heat exchanger and the hot water tank, and a connection portion between the intermediate hot water pipe and the hot water tank, and the intermediate hot water pipe and the bath heat exchanger. A bypass pipe connecting the return pipe, and a hot water path in the upper part of the hot water tank exchanged by the bath heat exchanger is an intermediate hot water pipe side or a connection side of the bath heat exchanger return pipe and the hot water tank The heat pump water heater according to claim 1, further comprising switching means for selecting and switching between the two. 給湯要求と風呂加熱要求とが同時にあった場合、風呂熱交換器で熱交換した貯湯槽上部の湯を中間出湯管側に流れるように切り換え手段を制御することを特徴とする請求項３に記載のヒートポンプ給湯機。 4. The switching means is controlled so that the hot water in the upper part of the hot water storage tank heat-exchanged by the bath heat exchanger flows to the intermediate hot water discharge pipe side when there is a hot water supply request and a bath heating request simultaneously. Heat pump water heater. 中間出湯管からの湯水と出湯管からの湯とを混合する中間混合弁と、前記中間混合弁からの湯と給水管からの水とを混合する給湯混合弁とを備えたことを特徴とする請求項１〜４のいずれか１項に記載のヒートポンプ給湯機。 An intermediate mixing valve that mixes hot water from the intermediate hot water pipe and hot water from the hot water pipe, and a hot water supply mixing valve that mixes hot water from the intermediate mixing valve and water from the water supply pipe are provided. The heat pump water heater according to any one of claims 1 to 4. 流量制御手段として、風呂熱交換器の熱源側に設けられ貯湯槽の湯を循環させる熱源側循環ポンプと、同じく前記風呂熱交換器の熱源側に設けられた流量制御弁とを用いた請求項１〜５のいずれかに記載のヒートポンプ給湯機。 The heat source side circulation pump that is provided on the heat source side of the bath heat exchanger and circulates the hot water in the hot water tank and the flow rate control valve that is also provided on the heat source side of the bath heat exchanger are used as the flow rate control means. The heat pump water heater according to any one of 1 to 5. 給湯要求と風呂加熱要求が同時にあった場合、風呂熱交換器で熱交換した貯湯槽の上部の湯が中間出湯管を通って前記貯湯槽に戻らないようにする流入防止手段を備えた請求項１〜６のいずれかに１項に記載のヒートポンプ給湯機。 An inflow prevention means is provided for preventing hot water in an upper part of the hot water storage tank heat-exchanged by the bath heat exchanger from returning to the hot water storage tank through an intermediate hot water discharge pipe when there is a hot water supply request and a bath heating request simultaneously. The heat pump water heater according to any one of 1 to 6. 中間混合弁の目標混合温度を、給湯温度設定手段で設定された給湯設定温度と風呂熱交換器の熱源側出口の温度に基づいて決定する請求項５〜７のいずれか１項に記載のヒートポンプ給湯機。 The heat pump according to any one of claims 5 to 7, wherein the target mixing temperature of the intermediate mixing valve is determined based on the hot water supply set temperature set by the hot water supply temperature setting means and the temperature of the heat source side outlet of the bath heat exchanger. Water heater. 中間混合弁の目標混合温度を、給湯温度設定手段で設定された給湯設定温度と風呂熱交換器の熱源側出口の温度との内でいずれか高い方の温度よりも所定の温度だけ高い温度に設定することとした請求項５〜７のいずれか１項に記載のヒートポンプ給湯機。 The target mixing temperature of the intermediate mixing valve is set to a temperature that is higher by a predetermined temperature than the higher one of the hot water supply set temperature set by the hot water supply temperature setting means and the temperature of the heat source side outlet of the bath heat exchanger. The heat pump water heater according to any one of claims 5 to 7, which is set. ヒートポンプの冷媒回路は、圧力が臨界圧力以上となる超臨界冷媒回路であり、前記臨界圧力以上に昇圧された冷媒により水を加熱する請求項１〜９のいずれか１項に記載のヒートポンプ給湯機。 The heat pump water heater according to any one of claims 1 to 9, wherein the refrigerant circuit of the heat pump is a supercritical refrigerant circuit whose pressure becomes equal to or higher than a critical pressure, and heats water with the refrigerant whose pressure is increased to the critical pressure or higher. .
JP2007087449A 2007-03-29 2007-03-29 Heat pump water heater Active JP5034601B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007087449A JP5034601B2 (en) 2007-03-29 2007-03-29 Heat pump water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007087449A JP5034601B2 (en) 2007-03-29 2007-03-29 Heat pump water heater

Publications (2)

Publication Number Publication Date
JP2008249169A true JP2008249169A (en) 2008-10-16
JP5034601B2 JP5034601B2 (en) 2012-09-26

Family

ID=39974326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007087449A Active JP5034601B2 (en) 2007-03-29 2007-03-29 Heat pump water heater

Country Status (1)

Country Link
JP (1) JP5034601B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010175150A (en) * 2009-01-29 2010-08-12 Rinnai Corp Hot water supply heating device
JP2011033273A (en) * 2009-07-31 2011-02-17 Daikin Industries Ltd Storage type hot water supply device
JP2012167903A (en) * 2011-02-16 2012-09-06 Corona Corp Storage type water heater
JP2018151099A (en) * 2017-03-10 2018-09-27 三菱電機株式会社 Storage water heater

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006003078A (en) * 2005-08-05 2006-01-05 Matsushita Electric Ind Co Ltd Hot water supply apparatus
JP2007057173A (en) * 2005-08-25 2007-03-08 Rinnai Corp Cogeneration system
JP2007271163A (en) * 2006-03-31 2007-10-18 Noritz Corp Returned hot water recovering method and hot water supply system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006003078A (en) * 2005-08-05 2006-01-05 Matsushita Electric Ind Co Ltd Hot water supply apparatus
JP2007057173A (en) * 2005-08-25 2007-03-08 Rinnai Corp Cogeneration system
JP2007271163A (en) * 2006-03-31 2007-10-18 Noritz Corp Returned hot water recovering method and hot water supply system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010175150A (en) * 2009-01-29 2010-08-12 Rinnai Corp Hot water supply heating device
JP2011033273A (en) * 2009-07-31 2011-02-17 Daikin Industries Ltd Storage type hot water supply device
JP2012167903A (en) * 2011-02-16 2012-09-06 Corona Corp Storage type water heater
JP2018151099A (en) * 2017-03-10 2018-09-27 三菱電機株式会社 Storage water heater

Also Published As

Publication number Publication date
JP5034601B2 (en) 2012-09-26

Similar Documents

Publication Publication Date Title
KR100640137B1 (en) Heat pumped water heating and heating apparaturs
JP2009092323A (en) Heat pump water heater
JP5838914B2 (en) Hot water storage water heater
JP5034601B2 (en) Heat pump water heater
JP4752347B2 (en) Hot water storage water heater
JP2003240342A (en) Heat pump type hot water supply system
JP4329732B2 (en) Heat pump water heater
JP5472178B2 (en) Hot water heater
JP2007046856A (en) Heat pump hot-water supply floor heating device
JP4375095B2 (en) Heat pump water heater
JP4368846B2 (en) Hot water storage water heater
JP2006234314A (en) Heat pump water heater
JP2005156156A (en) Multifunctional water heater
JP3931894B2 (en) Water heater
JP5846413B2 (en) Cogeneration system
JP5056083B2 (en) Heat pump water heater
JP6095749B1 (en) Hot water system
JP4867517B2 (en) Heat pump water heater
JP4033184B2 (en) Multi-function water heater
JP6043954B2 (en) Heat pump water heater
JP4138712B2 (en) Hot water storage hot water system
JP2008045826A (en) Hot-water storage type hot water supply heater
JP4424265B2 (en) Hot water storage water heater
JP5741256B2 (en) Hot water storage water heater
JP5617946B2 (en) Hot water storage water heater

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090609

RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20090714

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20111206

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20111226

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120605

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120618

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150713

Year of fee payment: 3

R151 Written notification of patent or utility model registration

Ref document number: 5034601

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150713

Year of fee payment: 3