JP2003139386A - Bathtub water reheating system - Google Patents
Bathtub water reheating systemInfo
- Publication number
- JP2003139386A JP2003139386A JP2001334051A JP2001334051A JP2003139386A JP 2003139386 A JP2003139386 A JP 2003139386A JP 2001334051 A JP2001334051 A JP 2001334051A JP 2001334051 A JP2001334051 A JP 2001334051A JP 2003139386 A JP2003139386 A JP 2003139386A
- Authority
- JP
- Japan
- Prior art keywords
- bath
- hot water
- water
- heat pump
- water heater
- 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.)
- Pending
Links
Landscapes
- Control For Baths (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ヒートポンプ給湯
機を用いた風呂の追い炊きシステムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath reheating system using a heat pump water heater.
【０００２】[0002]
【従来の技術】一般に、圧縮機、ガスクーラ（凝縮
器）、減圧装置および蒸発器を有する冷凍サイクルを備
え、このガスクーラで加熱した水を給湯可能に構成した
ヒートポンプ給湯機が知られている。2. Description of the Related Art Generally, there is known a heat pump water heater provided with a refrigeration cycle having a compressor, a gas cooler (condenser), a decompression device and an evaporator and capable of supplying hot water heated by the gas cooler.
【０００３】この種のものでは、近年、フロンのような
合成物ではなく、自然界に存在する物質を冷凍サイクル
に冷媒として使用する動きが高まり、特に、冷凍サイク
ルにＣＯ2冷媒を使用する検討が進められている。In this type, in recent years, there has been an increasing movement to use substances existing in nature as refrigerants in the refrigeration cycle rather than compounds such as CFCs. In particular, studies have been made on the use of CO 2 refrigerants in the refrigeration cycle. It is being advanced.
【０００４】このＣＯ2冷媒を使用した場合、冷凍サイ
クルの高圧側が超臨界となる遷臨界サイクル（Transcri
tical Cycle）になるため、ヒートポンプ給湯機におけ
る給湯のように、水の昇温幅が大きい加熱プロセスでは
高い成績係数（ＣＯＰ）を期待することができる。When this CO 2 refrigerant is used, a transcritical cycle (Transcribing cycle) in which the high pressure side of the refrigeration cycle becomes supercritical
Therefore, a high coefficient of performance (COP) can be expected in a heating process in which the temperature rise range of water is large, such as hot water supply in a heat pump water heater.
【０００５】このヒートポンプ給湯機は、風呂の追い炊
きシステムに利用されており、このシステムでは、風呂
の残り湯をヒートポンプ給湯機のガスクーラに循環させ
て、追い炊きを可能にしている。This heat pump water heater is used in a bath reheating system. In this system, the hot water remaining in the bath is circulated through a gas cooler of the heat pump water heater to enable reheating.
【０００６】[0006]
【発明が解決しようとする課題】しかし、ヒートポンプ
給湯機では、一般に、給水温度が低い場合、上述したＣ
ＯＰが低下するという問題がある。風呂の温度が下がっ
て、追い炊きする場合、残り湯の温度が低ければ、効率
のよい追い炊きが可能になるが、残り湯の温度がある程
度高い場合には、ガスクーラにおいて十分な放熱を行え
ず、効率の悪い運転になるという問題がある。この低効
率運転を回避するためには、追い炊きを行わず、あらた
に給水を行うか、或いは追い炊き専用の熱交換器を設置
する等の対策が必要になるという問題がある。However, in the heat pump water heater, generally, when the temperature of the water supply is low, the above-mentioned C is used.
There is a problem that OP decreases. When the temperature of the bath decreases and additional cooking is performed, if the temperature of the remaining hot water is low, efficient additional cooking is possible, but if the temperature of the remaining hot water is high to some extent, the gas cooler cannot perform sufficient heat dissipation. However, there is a problem of inefficient driving. In order to avoid this low-efficiency operation, there is a problem that it is necessary to take measures such as newly supplying water without performing additional cooking or installing a heat exchanger dedicated to additional cooking.
【０００７】そこで、本発明の目的は、上述した従来の
技術が有する課題を解消し、ＣＯＰを低下させることな
く、効率のよい追い炊きを行うことができる風呂の追い
炊きシステムを提供することにある。[0007] Therefore, an object of the present invention is to solve the problems of the above-mentioned conventional techniques, and to provide a reheating system for a bath which can efficiently reheat the COP without lowering it. is there.
【０００８】[0008]
【課題を解決するための手段】請求項１記載の発明は、
風呂の残り湯をヒートポンプ給湯機に循環し、風呂の追
い炊きを可能にした風呂の追い炊きシステムにおいて、
風呂の残り湯をヒートポンプ給湯機に循環せず、上水等
をヒートポンプ給湯機に供給し、風呂の追い炊きを行う
手段を備えたことを特徴とする。The invention according to claim 1 is
In the bath reheating system that circulates the remaining hot water of the bath to the heat pump water heater and enables the reheating of the bath,
It is characterized in that it is provided with a means for supplying the tap water to the heat pump water heater without circulating the remaining hot water in the bath to the heat pump water heater to reheat the bath.
【０００９】請求項２記載の発明は、風呂の残り湯をヒ
ートポンプ給湯機に循環し、風呂の追い炊きを可能にし
た風呂の追い炊きシステムにおいて、風呂の残り湯の温
度を検知する温度検知センサと、この温度検知センサの
検知温度が所定温度以上の場合、風呂の残り湯をヒート
ポンプ給湯機に循環せず、上水等をヒートポンプ給湯機
に供給し、風呂の追い炊きを行う手段とを備えたことを
特徴とする。According to a second aspect of the invention, in a bath reheating system in which the remaining hot water in the bath is circulated to the heat pump water heater to enable the additional heating of the bath, a temperature detecting sensor for detecting the temperature of the remaining hot water in the bath. When the temperature detected by the temperature detection sensor is equal to or higher than a predetermined temperature, the remaining hot water in the bath is not circulated to the heat pump water heater, but the tap water is supplied to the heat pump water heater to reheat the bath. It is characterized by that.
【００１０】請求項３記載の発明は、請求項２記載のも
のにおいて、前記温度検知センサが風呂の湯循環出口に
設置されていることを特徴とする。According to a third aspect of the present invention, in the second aspect, the temperature detection sensor is installed at a hot water circulation outlet of a bath.
【００１１】請求項４記載の発明は、請求項１ないし３
のいずれかに記載のものにおいて、風呂の湯循環出口と
ヒートポンプ給湯機とを接続する水配管に、上水等を給
水する給水弁を設けたことを特徴とする。The invention according to a fourth aspect is the first to the third aspects.
In any one of the above items, a water supply valve for supplying tap water or the like is provided in a water pipe connecting the hot water circulation outlet of the bath and the heat pump water heater.
【００１２】請求項５記載の発明は、請求項１ないし４
のいずれかに記載のものにおいて、上水等をヒートポン
プ給湯機に供給して、風呂の追い炊きを行う場合、風呂
の残り湯の一部を排水する手段を備えたことを特徴とす
る。The invention according to claim 5 is the invention according to claims 1 to 4.
In any one of the above items, when supplying tap water or the like to the heat pump water heater to reheat the bath, a means for draining a part of the remaining hot water of the bath is provided.
【００１３】請求項６記載の発明は、請求項５記載のも
のにおいて、風呂の湯循環出口とヒートポンプ給湯機と
を接続する水配管に、風呂の残り湯の一部を排水する排
水弁を備えたことを特徴とする。According to a sixth aspect of the present invention, in the fifth aspect, the water pipe connecting the hot water circulation outlet of the bath and the heat pump water heater is provided with a drain valve for draining a part of the remaining hot water of the bath. It is characterized by that.
【００１４】[0014]
【発明の実施の形態】以下、本発明の一実施形態を、図
面に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.
【００１５】図１は、ヒートポンプ給湯機を示してい
る。１は圧縮機を示し、この圧縮機１には、実線で示す
冷媒配管を介して、ガスクーラ（高圧側熱交換器）３、
減圧装置（弁装置）５、蒸発器（低圧側熱交換器）７が
順に接続されて、冷凍サイクルが構成されている。FIG. 1 shows a heat pump water heater. Reference numeral 1 denotes a compressor, and a gas cooler (high-pressure side heat exchanger) 3 is provided in the compressor 1 via a refrigerant pipe shown by a solid line.
A decompression device (valve device) 5 and an evaporator (low-pressure side heat exchanger) 7 are sequentially connected to form a refrigeration cycle.
【００１６】この冷凍サイクルにはＣＯ2冷媒が使用さ
れる。ＣＯ2冷媒はオゾン破壊係数が０で、地球温暖化
係数が１であるため、環境への負荷が小さく、毒性、可
燃性がなく安全で安価である。A CO 2 refrigerant is used in this refrigeration cycle. Since the CO 2 refrigerant has an ozone depletion potential of 0 and a global warming potential of 1, it has a low environmental load, is neither toxic nor flammable, and is safe and inexpensive.
【００１７】このＣＯ2冷媒を使用した場合、冷凍サイ
クルの高圧側が超臨界となる遷臨界サイクル（Transcri
tical Cycle）になるため、ヒートポンプ給湯機におけ
る給湯のように、水の昇温幅が大きい加熱プロセスでは
高い成績係数（ＣＯＰ）を期待することができる。When this CO 2 refrigerant is used, the transcritical cycle (Transcriber) in which the high pressure side of the refrigeration cycle becomes supercritical
Therefore, a high coefficient of performance (COP) can be expected in a heating process in which the temperature rise range of water is large, such as hot water supply in a heat pump water heater.
【００１８】一方、上記ガスクーラ３は、ＣＯ2冷媒が
流れる冷媒コイル９と、水が流れる水コイル１０とから
なり、この水コイル１０は水配管２１，２３を介して貯
湯タンク１１に接続されている。On the other hand, the gas cooler 3 comprises a refrigerant coil 9 through which a CO 2 refrigerant flows and a water coil 10 through which water flows. The water coil 10 is connected to a hot water storage tank 11 via water pipes 21 and 23. There is.
【００１９】この貯湯タンク１１からガスクーラ３に冷
水を供給する水配管２１には、循環ポンプ１３が接続さ
れ、この循環ポンプ１３が運転されると、貯湯タンク１
１の水がガスクーラ３を循環し、ここで加熱された後、
水配管２３を経て、貯湯タンク１１に貯湯される。A circulation pump 13 is connected to a water pipe 21 for supplying cold water from the hot water storage tank 11 to the gas cooler 3. When the circulation pump 13 is operated, the hot water storage tank 1
1 water circulates through the gas cooler 3 and is heated here,
Hot water is stored in the hot water storage tank 11 via the water pipe 23.
【００２０】本実施形態では、上述したヒートポンプ給
湯機に対して、貯湯タンク１１と並列に風呂３０が追い
炊き可能に接続されている。この風呂３０の湯循環入口
３０Ａは、追い炊き配管３１を介して、貯湯タンク１１
の上部に接続された三方弁３３に接続され、風呂３０の
湯循環出口３０Ｂは、追い炊き配管３２を介して、貯湯
タンク１１の下部に接続されている。また、追い炊き配
管３２には開閉弁３４が設けられ、この開閉弁３４の上
流（風呂３０側）および下流（貯湯タンク１１側）に
は、それぞれ排水弁３６および給水弁３５が接続されて
いる。また、風呂３０の湯循環出口３０Ｂには、風呂３
０の残り湯の温度を検知する温度検知センサ３７が接続
されている。In the present embodiment, a bath 30 is connected to the above-described heat pump water heater in parallel with the hot water storage tank 11 so that the bath 30 can be reheated. The hot water circulation inlet 30A of the bath 30 is connected to the hot water storage tank 11 via a reheating pipe 31.
The hot water circulation outlet 30B of the bath 30 is connected to the lower part of the hot water storage tank 11 via the reheating pipe 32. An open / close valve 34 is provided in the reheating pipe 32, and a drain valve 36 and a water supply valve 35 are connected upstream (on the bath 30 side) and downstream (on the hot water storage tank 11 side) of the open / close valve 34, respectively. . In addition, the hot water circulation outlet 30B of the bath 30 has a bath 3
A temperature detection sensor 37 for detecting the temperature of the remaining hot water of 0 is connected.
【００２１】つぎに、ヒートポンプ給湯機の動作を説明
する。Next, the operation of the heat pump water heater will be described.
【００２２】貯湯運転時には、三方弁３３のポートＡ，
Ｃが連通し、開閉弁３４、排水弁３６および給水弁３５
がすべて閉じられ、圧縮機１および循環ポンプ１３が運
転し、貯湯タンク１１内の低温水が、破線矢印で示すよ
うに、ガスクーラ３に供給され、ここで加熱され、貯湯
タンク１１内に貯湯される。この貯湯タンク１１内に
は、低温水と高温水とが共存し、温度成層が形成され
る。During the hot water storage operation, port A of the three-way valve 33,
C communicates with each other, and an on-off valve 34, a drain valve 36 and a water supply valve 35
Are all closed, the compressor 1 and the circulation pump 13 are operated, and the low-temperature water in the hot water storage tank 11 is supplied to the gas cooler 3 as shown by the broken line arrow, heated here, and stored in the hot water storage tank 11. It In this hot water storage tank 11, low temperature water and high temperature water coexist and a temperature stratification is formed.
【００２３】つまり、この貯湯タンク１１では、温度境
界層を境界にして、タンク上部に高温のお湯が溜まり、
下部に比較的低温のお湯が溜まり、貯湯運転時には、循
環ポンプ１３の運転によって、水配管２１を経て、タン
ク下部からガスクーラ３に給水され、ここで加熱された
後、水配管２３を経て、温水がガスクーラ３からタンク
上部に戻される。That is, in this hot water storage tank 11, high temperature hot water is collected at the upper part of the tank with the temperature boundary layer as a boundary,
The relatively low temperature hot water collects in the lower part, and during the hot water storage operation, the circulation pump 13 operates to supply water from the lower part of the tank to the gas cooler 3 through the water pipe 21, and after being heated there, the water cools through the water pipe 23 and warm water. Is returned from the gas cooler 3 to the upper part of the tank.
【００２４】一方、風呂３０の追い炊き時には、三方弁
３３のポートＡ，Ｂが連通する。また、開閉弁３４が開
かれ、給水弁３５および排水弁３６が閉じられる。圧縮
機１および循環ポンプ１３が運転し、風呂３０の湯循環
出口３０Ｂから残り湯が、実線矢印で示すように、ガス
クーラ３に供給され、ここで加熱され、三方弁３３のポ
ートＡ，Ｂを経て、高温水が湯循環入口３０Ａに戻され
る。On the other hand, when the bath 30 is reheated, the ports A and B of the three-way valve 33 communicate with each other. Further, the open / close valve 34 is opened, and the water supply valve 35 and the drain valve 36 are closed. The compressor 1 and the circulation pump 13 are operated, and the remaining hot water is supplied from the hot water circulation outlet 30B of the bath 30 to the gas cooler 3 as shown by the solid arrow and heated there, and the ports A and B of the three-way valve 33 are turned on. After that, the high temperature water is returned to the hot water circulation inlet 30A.
【００２５】ヒートポンプ給湯機では、一般に、給水温
度が低い場合、ＣＯＰが低下する。風呂の温度が下がっ
て、追い炊きする場合、残り湯の温度が低ければ、効率
のよい追い炊きが可能になるが、温度がある程度高い場
合、ガスクーラ３において十分な放熱を行えず、効率の
悪い運転になる。In the heat pump water heater, the COP generally decreases when the water supply temperature is low. When the temperature of the bath decreases and additional cooking is performed, if the temperature of the remaining hot water is low, efficient additional cooking is possible, but if the temperature is high to some extent, the gas cooler 3 cannot sufficiently dissipate heat and the efficiency is poor. Become driving.
【００２６】本実施形態では、この低効率運転を回避す
るため、温度検知センサ３７の検知温度が所定温度以上
の場合、図示を省略したコントローラによる制御によっ
て、開閉弁３４が閉じられると共に、給水弁３５および
排水弁３６が開かれる。すると、風呂３０の残り湯はヒ
ートポンプ給湯機に循環せず、その一部が排水弁３６を
通じて排水され、給水弁３５を通じて上水が、ヒートポ
ンプ給湯機のガスクーラ３に供給され、ここで加熱さ
れ、三方弁３３のポートＡ，Ｂを経て、高温水が湯循環
入口３０Ａに供給される。In the present embodiment, in order to avoid this low-efficiency operation, when the temperature detected by the temperature detection sensor 37 is equal to or higher than a predetermined temperature, the on-off valve 34 is closed and the water supply valve is controlled by a controller (not shown). 35 and drain valve 36 are opened. Then, the remaining hot water of the bath 30 does not circulate to the heat pump water heater, a part of the hot water is drained through the drain valve 36, and clean water is supplied to the gas cooler 3 of the heat pump water heater through the water supply valve 35, where it is heated. High-temperature water is supplied to the hot water circulation inlet 30A via the ports A and B of the three-way valve 33.
【００２７】これによれば、ヒートポンプ給湯機の給水
温度は、上水と等しく低いため、ＣＯＰが低下すること
はない。給水弁３５および排水弁３６の流量をほぼ等し
くしておけば、風呂３０の水量に変化はなく、風呂３０
の残り湯を追い炊きした場合と同様の感覚、効果を実現
できる。According to this, since the temperature of the water supplied by the heat pump water heater is as low as that of the clean water, the COP does not decrease. If the flow rates of the water supply valve 35 and the drain valve 36 are made substantially equal, the water volume of the bath 30 does not change and the bath 30
You can achieve the same sensation and effect as when you cook up the remaining hot water.
【００２８】要するに、追い炊きする場合、風呂の残り
湯の有効利用か、ヒートポンプ給湯機のＣＯＰの低下防
止か、の選択となる。In short, in the case of additional cooking, the effective use of the remaining hot water in the bath or the prevention of the reduction of the COP of the heat pump water heater must be selected.
【００２９】本実施形態では、風呂の残り湯の温度が高
い場合、ヒートポンプ給湯機のＣＯＰの低下を回避すべ
く、風呂の残り湯を使用せず、上水利用による追い炊き
を実現し、風呂の残り湯の温度が低い場合、風呂の残り
湯を有効利用して、追い炊きを実現することができる。In the present embodiment, when the temperature of the hot water remaining in the bath is high, in order to avoid a decrease in the COP of the heat pump water heater, the remaining hot water in the bath is not used, and additional cook-up by utilizing clean water is realized. When the temperature of the remaining hot water is low, it is possible to effectively use the remaining hot water in the bath to realize additional cooking.
【００３０】従来のように、追い炊き専用の熱交換器を
設置する等の対策も必要なく、きわめて高効率の追い炊
きを実現できる。[0030] Unlike the conventional case, it is possible to realize an extremely high-efficiency additional cooking without any measures such as installing a heat exchanger dedicated to additional cooking.
【００３１】以上、一実施形態に基づいて本発明を説明
したが、本発明は、これに限定されるものでないことは
明らかである。上記実施形態では、風呂３０の残り湯の
湯温に応じて、ヒートポンプ給湯機に風呂３０の残り湯
を供給するか、上水等を供給するかを切り換えたが、こ
れに限定されず、例えば風呂の利用者が上述した切り換
えを手動で行うようにしてもよい。Although the present invention has been described based on the embodiment, it is obvious that the present invention is not limited to this. In the above-described embodiment, the remaining hot water of the bath 30 or the clean water is switched to the heat pump water heater according to the hot water temperature of the remaining hot water of the bath 30, but the present invention is not limited to this. The user of the bath may manually perform the above switching.
【００３２】[0032]
【発明の効果】本発明では、ＣＯＰを低下させることな
く追い炊きを行うことができ、従来のように、追い炊き
専用の熱交換器を設置する等の対策も必要なく、きわめ
て高効率の追い炊きを実現できる。EFFECTS OF THE INVENTION According to the present invention, additional cooking can be performed without lowering the COP, and unlike the conventional case, there is no need to install a heat exchanger for exclusive use of additional cooking, and extremely high efficiency is achieved. You can cook.
【図１】本発明による風呂の追い炊きシステムの一実施
形態を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of a bath reheating system according to the present invention.
【符号の説明】 １ 圧縮機 ３ ガスクーラ ５ 減圧装置（弁装置） ７ 蒸発器 １１ 貯湯タンク ３０ 風呂 ３０Ａ 湯循環入口 ３０Ｂ 湯循環出口 ３４ 開閉弁 ３５ 給水弁 ３６ 排水弁 ３７ 温度検知センサ[Explanation of symbols] 1 compressor 3 gas cooler 5 Pressure reducing device (valve device) 7 evaporator 11 Hot water storage tank 30 baths 30A hot water circulation inlet 30B hot water circulation outlet 34 on-off valve 35 Water valve 36 drain valve 37 Temperature sensor
Claims (6)
環し、風呂の追い炊きを可能にした風呂の追い炊きシス
テムにおいて、風呂の残り湯をヒートポンプ給湯機に循
環せず、上水等をヒートポンプ給湯機に供給し、風呂の
追い炊きを行う手段を備えたことを特徴とする風呂の追
い炊きシステム。1. A bath reheating system in which the hot water remaining in the bath is circulated to a heat pump water heater so that the hot water can be reheated without circulating the remaining hot water in the bath to the heat pump water heater. A bath reheating system characterized by being provided with a means for supplying the water to the water heater to reheat the bath.
環し、風呂の追い炊きを可能にした風呂の追い炊きシス
テムにおいて、 風呂の残り湯の温度を検知する温度検知センサと、 この温度検知センサの検知温度が所定温度以上の場合、
風呂の残り湯をヒートポンプ給湯機に循環せず、上水等
をヒートポンプ給湯機に供給し、風呂の追い炊きを行う
手段とを備えたことを特徴とする風呂の追い炊きシステ
ム。2. In a bath reheating system in which the remaining hot water in the bath is circulated to a heat pump water heater to reheat the bath, a temperature detection sensor for detecting the temperature of the remaining hot water in the bath, and this temperature detection sensor. If the detected temperature of is above the specified temperature,
A reheating system for a bath, which comprises means for supplying replenishing water to the heat pump water heater without circulating the remaining hot water in the bath to the heat pump water heater, and reheating the bath water.
に設置されていることを特徴とする請求項２記載の風呂
の追い炊きシステム。3. The bath reheating system according to claim 2, wherein the temperature detection sensor is installed at a hot water circulation outlet of the bath.
とを接続する水配管に、上水等を給水する給水弁を設け
たことを特徴とする請求項１ないし３のいずれかに記載
の風呂の追い炊きシステム。4. The bath according to claim 1, wherein a water pipe connecting the hot water circulation outlet of the bath and the heat pump water heater is provided with a water supply valve for supplying clean water or the like. Additional cooking system.
て、風呂の追い炊きを行う場合、風呂の残り湯の一部を
排水する手段を備えたことを特徴とする請求項１ないし
４のいずれかに記載の風呂の追い炊きシステム。5. A means for draining a part of the hot water remaining in the bath when the hot water is supplied to the heat pump water heater to reheat the bath. Bath reheating system described in any one.
とを接続する水配管に、風呂の残り湯の一部を排水する
排水弁を備えたことを特徴とする請求項５記載の風呂の
追い炊きシステム。6. The bath follower according to claim 5, wherein a water pipe connecting the hot water circulation outlet of the bath and the heat pump water heater is provided with a drain valve for draining a part of the hot water remaining in the bath. Cooking system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001334051A JP2003139386A (en) | 2001-10-31 | 2001-10-31 | Bathtub water reheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001334051A JP2003139386A (en) | 2001-10-31 | 2001-10-31 | Bathtub water reheating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003139386A true JP2003139386A (en) | 2003-05-14 |
Family
ID=19149240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001334051A Pending JP2003139386A (en) | 2001-10-31 | 2001-10-31 | Bathtub water reheating system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003139386A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007113836A (en) * | 2005-10-20 | 2007-05-10 | Daikin Ind Ltd | Heat pump type water heater |
| JP2007155286A (en) * | 2005-12-08 | 2007-06-21 | Sharp Corp | Hot water storage water heater |
-
2001
- 2001-10-31 JP JP2001334051A patent/JP2003139386A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007113836A (en) * | 2005-10-20 | 2007-05-10 | Daikin Ind Ltd | Heat pump type water heater |
| JP2007155286A (en) * | 2005-12-08 | 2007-06-21 | Sharp Corp | Hot water storage water heater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6007123B2 (en) | Heat pump system | |
| JP4687378B2 (en) | Heat pump water heater | |
| JP2008064330A (en) | Heat pump hot water supply system | |
| JP2002048398A (en) | Heat pump hot water supply apparatus | |
| JP2009300055A (en) | Heat pump water heater | |
| JP4692148B2 (en) | Heat pump water heater | |
| JP2004218921A (en) | Heat pump water heater | |
| JP5176474B2 (en) | Heat pump water heater | |
| JP2009068761A (en) | Hot water storage type water heater | |
| JP2010084975A (en) | Heating device | |
| JP2004232978A (en) | Heat pump type hot water supply and heating apparatus | |
| JP2003139386A (en) | Bathtub water reheating system | |
| JP2004218908A (en) | Water heater | |
| JP3284905B2 (en) | Heat pump system | |
| JP5447968B2 (en) | Heat pump equipment | |
| JP2007192540A (en) | Heat pump system | |
| JP2004218910A (en) | Heat pump type hot-water supply heating device | |
| JP4363024B2 (en) | Refrigerant circuit | |
| JP2010216751A (en) | Heat pump type water heater | |
| JP2012242012A (en) | Hot water storage type water heater | |
| JP2004218911A (en) | Heat pump type hot-water supply heating device | |
| JP2009281629A (en) | Heat pump water heater | |
| JP3841051B2 (en) | Heat pump water heater | |
| JP4515883B2 (en) | Hot water storage water heater | |
| JP2003121001A (en) | Hot water storage system |