JP2007003057A - Storage water heater - Google Patents

Storage water heater Download PDF

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JP2007003057A
JP2007003057A JP2005181954A JP2005181954A JP2007003057A JP 2007003057 A JP2007003057 A JP 2007003057A JP 2005181954 A JP2005181954 A JP 2005181954A JP 2005181954 A JP2005181954 A JP 2005181954A JP 2007003057 A JP2007003057 A JP 2007003057A
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hot water
temperature
water supply
mixing valve
valve
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JP4752347B2 (en
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Yoshihisa Urakawa
芳久 浦川
Hiroshi Ishihara
博 石原
Hiromi Toyoda
博巳 豊田
Koji Furuichi
弘司 古市
Koji Ito
孝二 伊藤
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a small amount of hot water of very high temperature flows out from a column, when a cock of the column is slightly opened. <P>SOLUTION: When a hot water supply temperature detector 123 detects a prescribed temperature in a state that the cock of the column 124 is in a slightly opened state after the hot water supply from the column 124 is temporarily stopped, and a small amount of hot water flows out from the column 124, a valve opening at a tap water side, of a hot water supply mixing valve 122 is controlled to increase a mixing ratio of the tap water. The prescribed temperature is a value obtained by adding a certain value to a set temperature set by a hot water supply remote controller 132. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、貯湯式給湯装置に関するものである。   The present invention relates to a hot water storage type hot water supply apparatus.

従来、この種の貯湯式給湯装置は、貯湯タンクの上部から出湯する第1の給湯配管とともに、貯湯タンクの略中間部にある湯水を出湯する第2の給湯配管を設け、使用者に湯水を供給する際には、第1の給湯配管と第2の給湯配管からの湯水を第2混合弁にて混合し、その後第1混合弁により水道水と混合して温度調節をした上で給湯していた。また、第2混合弁からの湯水を風呂側へ分岐させて水道水と混合することも可能であり、風呂給湯として利用することもできる(例えば、特許文献1参照)。
特開2003−240342号公報
Conventionally, this type of hot water storage type hot water supply apparatus is provided with a first hot water supply pipe for discharging hot water from the upper part of the hot water storage tank, and a second hot water supply pipe for discharging hot water in a substantially intermediate part of the hot water storage tank, and supplying hot water to the user. When supplying, hot water from the first hot water supply pipe and the second hot water supply pipe is mixed by the second mixing valve, and then mixed with tap water by the first mixing valve to adjust the temperature, and then hot water is supplied. It was. Further, the hot water from the second mixing valve can be branched to the bath side and mixed with tap water, and can also be used as bath hot water (see, for example, Patent Document 1).
JP 2003-240342 A

ところで上記構成において、給湯流量が確認できないくらい微量な給湯を行っていた場合や、カランを十分閉め切っていなかった場合に、リモコン等による設定温度によっては高温の微量湯水がカランから流れ出ることがあった。   By the way, in the above configuration, when a small amount of hot water was supplied so that the flow rate of hot water could not be confirmed, or when the curan was not fully closed, high-temperature traces of hot water might flow out of the curan depending on the temperature set by the remote controller. .

また、給湯栓への給湯と風呂への給湯とが同時に行われた直後では、カランへの給湯量に比べて風呂給湯のための給湯量の方が圧倒的に多いことから、カランへの給湯を行う第1混合弁への流入湯量が通常と異なり、混合比率が湯側に偏っていることがあった。そのため、微量の給湯を行う際に設定温度以上の高温湯水が給湯されやすくなっていた。   In addition, immediately after the hot water supply to the hot water tap and the hot water supply to the bath are performed at the same time, the hot water supply amount for the bath hot water is overwhelmingly larger than the hot water supply amount to the curan. The amount of hot water flowing into the first mixing valve that performs the operation is different from usual, and the mixing ratio is sometimes biased toward the hot water side. For this reason, when a small amount of hot water is supplied, high-temperature hot water having a temperature equal to or higher than the set temperature is easily supplied.

本発明は、このような課題を解決するもので、給湯流量が確認できないくらい微量な給湯を行っていた場合や、カランを十分閉め切っていなかった場合に起こりうる微量給湯(給湯流量が確認できないくらい微量な給湯)において、高温の微量湯水がカランから流れ出ることを防止し、安全性を高めることを目的とする。   The present invention solves such a problem, and if a small amount of hot water is supplied to such an extent that the hot water supply flow rate cannot be confirmed, or if the curan is not sufficiently closed, the small amount of hot water supply (the hot water supply flow rate cannot be confirmed). The purpose is to increase the safety by preventing high-temperature trace hot water from flowing out of the currant.

前記従来の課題を解決するために、本発明の貯湯式給湯装置は、制御手段により混合弁の弁開度を制御して給湯温度を調整していないような微量給湯時に前記温度検出手段により検出される温度が所定温度以上となったとき、前記制御手段は給水管からの水の混合比率を大きくするように前記混合弁の弁開度を制御するものである。   In order to solve the above-mentioned conventional problems, the hot water storage type hot water supply apparatus of the present invention is detected by the temperature detection means during a minute amount of hot water supply in which the valve opening of the mixing valve is not controlled by the control means to adjust the hot water supply temperature. The control means controls the valve opening degree of the mixing valve so as to increase the mixing ratio of water from the water supply pipe when the temperature to be applied becomes a predetermined temperature or higher.

上記発明によれば、給湯流量が確認できないくらい微量な給湯を行っていた場合や、カランを十分閉め切っていなかった場合であっても、カランから高温の微量湯水が流れ出ることを防止し、安全性を高めた貯湯式給湯装置を提供できる。   According to the above invention, even when a small amount of hot water is supplied so that the hot water flow rate cannot be confirmed, or even when the curan is not sufficiently closed, the hot water is prevented from flowing out from the curan, and safety is ensured. It is possible to provide a hot water storage type hot-water supply device that has improved the temperature.

本発明の貯湯式給湯装置は、給湯流量が確認できないくらい微量な給湯を行っていた場合や、カランを十分閉め切っていなかった場合であっても、カランから高温の微量湯水が流れ出ることを防止し、安全性を高めることができる。   The hot water storage type hot water supply apparatus of the present invention prevents a high temperature trace amount of hot water from flowing out of the currant even when a small amount of hot water is supplied such that the flow rate of the hot water supply cannot be confirmed or when the currant is not fully closed. , Can increase safety.

第1の発明は、ヒートポンプ回路を用いて加熱した湯水をタンク上部から成層状態で貯湯し、リモコンにより設定される設定温度の湯水を端末側に給湯する貯湯式給湯装置であって、タンク上部の湯水を取り出す出湯管と、出湯管からの湯水と給水管からの水とを混
合し所定温度の湯水を端末側に供給する混合弁と、混合弁からの湯温を検出する温度検出手段と、温度検出手段により検出される温度に基づいて混合弁の弁開度を制御して混合比率を可変とする制御手段とを備え、制御手段により混合弁の弁開度を制御して給湯温度を調整していないような端末からの微量給湯時に温度検出手段により検出される温度が所定温度以上となったとき、制御手段は給水管からの水の混合比率を大きくするように混合弁の弁開度を制御するものである。
A first invention is a hot water storage type hot water supply apparatus that stores hot water heated using a heat pump circuit in a stratified state from the upper part of a tank, and supplies hot water at a set temperature set by a remote controller to a terminal side. A tapping pipe for taking out hot water, a mixing valve for mixing hot water from the tapping pipe and water from the water supply pipe and supplying hot water of a predetermined temperature to the terminal side, temperature detecting means for detecting the hot water temperature from the mixing valve, Control means for controlling the valve opening of the mixing valve based on the temperature detected by the temperature detecting means to make the mixing ratio variable, and the hot water temperature is adjusted by controlling the valve opening of the mixing valve by the control means When the temperature detected by the temperature detection means during a minute amount of hot water supply from a terminal that has not been reached exceeds a predetermined temperature, the control means opens the valve opening of the mixing valve so as to increase the mixing ratio of water from the water supply pipe Is to control

そのため、給湯流量が確認できないくらい微量な給湯を行っていた場合や、カランを十分閉め切っていなかった場合であっても、カランから高温の微量湯水が流れ出ることを防止し、安全性を高めることができる。   Therefore, even if a small amount of hot water is supplied so that the hot water supply flow rate cannot be confirmed, or even if the curan is not fully closed, high temperature traces of hot water can be prevented from flowing out of the currant, thereby improving safety. it can.

第2の発明は、ヒートポンプ回路を用いて加熱した湯水を貯湯タンク上部から成層状態で貯湯し、リモコンにより設定される設定温度の湯水をカラン側または風呂端末側に供給する貯湯式給湯装置であって、タンク上部の湯水を取り出す出湯管と、出湯管からの湯水と給水管からの水とを混合し所定温度の湯水をカラン側に給湯する給湯混合弁と、出湯管からの湯水と給水管からの水とを混合し所定温度の湯水を風呂端末側に供給する風呂混合弁と、給湯混合弁からの湯温を検出する温度検出手段と、温度検出手段により検出される温度に基づいて給湯混合弁の弁開度を制御して混合比率を可変とする制御手段を備え、制御手段により混合弁の弁開度を制御して給湯温度を調整していないようなカランからの微量給湯時に温度検出手段により検出される温度が所定温度以上となったとき、制御手段は給水管からの水の混合比率を大きくするように給湯混合弁の弁開度を制御するものである。   A second invention is a hot water storage type hot water supply apparatus that stores hot water heated using a heat pump circuit in a stratified state from the upper part of a hot water storage tank and supplies hot water at a set temperature set by a remote controller to a currant side or a bath terminal side. A hot water supply pipe for taking out hot water from the upper part of the tank, a hot water supply mixing valve for mixing hot water from the hot water supply pipe and water from the water supply pipe to supply hot water of a predetermined temperature to the currant side, and hot water and water supply pipe from the hot water supply pipe A bath mixing valve that mixes water from the water and supplies hot water of a predetermined temperature to the bath terminal side, temperature detection means for detecting the temperature of hot water from the hot water supply mixing valve, and hot water supply based on the temperature detected by the temperature detection means It is equipped with a control means that controls the valve opening of the mixing valve to vary the mixing ratio, and the temperature at the time of a small amount of hot water supply from Karan that does not adjust the hot water supply temperature by controlling the valve opening of the mixing valve by the control means. By detection means When the temperature be issued is equal to or greater than a predetermined temperature, the control means controls the valve opening degree of the hot water supply mixing valve so as to increase the mixing ratio of water from the water supply pipe.

また、出湯管からカラン側と風呂端末側とへ分岐することによってカランと風呂への給湯を行える貯湯式給湯装置において、カランへの給湯と風呂への給湯とが同時に行われる場合、カランへの給湯量に比べて風呂給湯のための給湯量の方が圧倒的に多いことから、カランへの給湯を行う給湯混合弁への流入湯量が通常とは異なり、混合比率が湯側に偏っていることがあった。そこで、制御手段により混合弁の弁開度を制御して給湯温度を調整していないようなカランからの微量給湯時に温度検出手段により検出される温度が所定温度以上となったとき、制御手段は給水管からの水の混合比率を大きくするように給湯混合弁の弁開度を制御することにより、カランから高温の微量湯水が流れ出ることを防止し、安全性を高めることができる。   In addition, in a hot water storage hot water supply system that can supply hot water to the currant and bath by branching from the hot water pipe to the currant side and the bath terminal side, if hot water supply to the currant and hot water to the bath are performed simultaneously, Since the amount of hot water for bath water supply is overwhelmingly larger than the amount of hot water, the amount of hot water flowing into the hot water mixing valve that supplies hot water to Karan is different from the normal amount, and the mixing ratio is biased toward the hot water side. There was a thing. Therefore, when the temperature detected by the temperature detection means at the time of a small amount of hot water supply from a currant that does not adjust the hot water supply temperature by controlling the valve opening of the mixing valve by the control means, the control means By controlling the valve opening degree of the hot water supply mixing valve so as to increase the mixing ratio of water from the water supply pipe, it is possible to prevent high-temperature trace hot water from flowing out of the currant and improve safety.

第3の発明は、特に第1または第2の発明において、カラン等端末からの微量給湯時に温度検出手段により検出される所定温度を、リモコンにより設定される設定温度に一定値を加算して得られる値としたものである。これによって、混合弁(または給湯混合弁)から流れ出る湯水がある程度高温となれば、混合弁の弁開度を水の混合比率が大きくなるように制御するので、安全性が高まる。   The third invention is obtained, in particular, in the first or second invention, by adding a predetermined value to the set temperature set by the remote controller for the predetermined temperature detected by the temperature detecting means when a small amount of hot water is supplied from a terminal such as a currant. Value. As a result, when the hot water flowing out from the mixing valve (or hot water mixing valve) reaches a certain high temperature, the valve opening degree of the mixing valve is controlled so that the mixing ratio of water is increased, so that safety is improved.

第4の発明は、特に第3の発明において、カラン等端末からの微量給湯時に温度検出手段により検出される所定温度を、カラン側への給湯を停止した際の設定温度に一定値を加算して得られる値としたものである。これは、カラン側への給湯を停止した後に使用者が温度設定を改めて高くなるように設定した場合であっても、適当なタイミングで混合弁の弁開度を水の混合比率が大きくなるように制御するので、安全性が高まる。   In a fourth aspect of the invention, in particular, in the third aspect of the invention, a predetermined value detected by the temperature detecting means at the time of a small amount of hot water supply from a terminal such as a curan is added to a set temperature when hot water supply to the currant side is stopped. Value obtained. This is because even when the user sets the temperature setting to be higher again after stopping the hot water supply to the currant side, the mixing ratio of the water is increased at an appropriate timing so that the water mixing ratio increases. Therefore, safety is improved.

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貯湯式給湯装置の構成図を示すものである
(Embodiment 1)
FIG. 1 shows a configuration diagram of a hot water storage type hot water supply apparatus according to a first embodiment of the present invention.

図1の貯湯式給湯装置において、貯湯タンク101は高温の湯水を貯え、沸き上げ管102は貯湯タンク101の上部と下部を接続している。貯湯タンク101の下部にある湯水は、貯湯タンク101の途中に設けられた沸き上げポンプ103によって熱交換器104へ流され、熱交換器104で加熱された湯水は貯湯タンク101の上部から蓄えられる。貯湯タンク101の上部に供給される高温の湯は、貯湯タンク101内でその比重差から高温の湯水が上部に、低温の湯水が下部に分離した形となり、積層状態で蓄えられる。また、貯湯タンク101内の湯水が使用されると、それに伴い給水管105から貯湯タンク101の下部に水が供給され、積層状態を保ちながら蓄えられる。   In the hot water storage type hot water supply apparatus of FIG. 1, the hot water storage tank 101 stores hot hot water, and the boiling pipe 102 connects the upper part and the lower part of the hot water storage tank 101. The hot water in the lower part of the hot water storage tank 101 is flowed to the heat exchanger 104 by the boiling pump 103 provided in the middle of the hot water storage tank 101, and the hot water heated by the heat exchanger 104 is stored from the upper part of the hot water storage tank 101. . The hot water supplied to the upper part of the hot water storage tank 101 is stored in a stacked state in the hot water storage tank 101 in such a form that the hot water is separated into the upper part and the low temperature hot water is separated into the lower part due to the difference in specific gravity. Further, when hot water in the hot water storage tank 101 is used, water is supplied from the water supply pipe 105 to the lower part of the hot water storage tank 101 and stored while maintaining the laminated state.

熱交換器104では、貯湯タンク101からの湯水と冷媒回路106内を循環している冷媒(二酸化炭素)とが熱交換を行う。冷媒回路106は、熱交換器104と蒸発器107、圧縮機108、膨張弁109、ファン110により構成されている。   In the heat exchanger 104, the hot water from the hot water storage tank 101 and the refrigerant (carbon dioxide) circulating in the refrigerant circuit 106 exchange heat. The refrigerant circuit 106 includes a heat exchanger 104, an evaporator 107, a compressor 108, an expansion valve 109, and a fan 110.

上記のような湯水を加熱する沸き上げ運転は、通常は電力料金の安価である深夜時間帯(例えば午後11時から午前7時あいだ)に行われる。深夜時間帯には、貯湯タンク101内に低温の湯水(または水)が貯えられているかどうかを確認し、低温の湯水が確認されれば貯湯タンク101内が高温の湯水で満たされるまで沸き上げ運転が続けられる。   The boiling operation for heating hot water as described above is usually performed in the late-night time period (for example, from 11:00 pm to 7:00 am) where the electricity rate is low. During the midnight hours, it is checked whether low temperature hot water (or water) is stored in the hot water storage tank 101, and if low temperature hot water is confirmed, the hot water storage tank 101 is boiled until it is filled with high temperature hot water. Driving continues.

貯湯タンク101の上部には高温水を取り出す出湯管111を設け、この出湯管111と給水管105の略中間部には中温湯を取り出す中間出湯管112が設けられている。そして、出湯管111の途中からは、浴槽113の湯水と熱交換して追い焚き動作を行うための風呂熱交換器114と循環ポンプ115とを備える風呂利用回路116が設けられており、貯湯タンク101の下部まで接続されている。また、風呂熱交換器114の二次側には浴槽113の風呂アダプター117と接続し風呂ポンプ118により浴槽水を循環させるための風呂循環回路119が構成されている。   A hot water discharge pipe 111 for taking out high temperature water is provided at the upper part of the hot water storage tank 101, and an intermediate hot water discharge pipe 112 for taking out the intermediate hot water is provided at a substantially intermediate portion between the hot water supply pipe 111 and the water supply pipe 105. A bath use circuit 116 including a bath heat exchanger 114 and a circulation pump 115 for exchanging heat with hot water in the bathtub 113 and performing a reheating operation is provided from the middle of the hot water discharge pipe 111. It is connected to the lower part of 101. Further, a bath circulation circuit 119 is configured on the secondary side of the bath heat exchanger 114 to connect the bath adapter 117 of the bathtub 113 and circulate the bath water by the bath pump 118.

上記構成により、風呂追い焚き運転は、貯湯タンク101の上部より供給された高温水が、風呂熱交換器114において風呂循環回路119を流れる浴槽水と熱交換されることによって行われる。そして、熱交換によって温度低下した湯水は、中温湯となって貯湯タンク101に戻される。このとき、貯湯タンク101内には、高温層の湯水、中間温度層の湯水、低温層の湯水が積層状態となって蓄えられている。また、この風呂追い焚き動作が継続すると、貯湯タンク101内は上部の高温水の量が減少し、その下方に蓄積される中温湯の量が増大する。   With the above-described configuration, the bath chasing operation is performed by heat exchange of the hot water supplied from the upper part of the hot water storage tank 101 with the bath water flowing in the bath circulation circuit 119 in the bath heat exchanger 114. The hot water whose temperature has decreased due to heat exchange is returned to the hot water storage tank 101 as medium hot water. At this time, the hot water storage tank 101 stores hot water of a high temperature layer, hot water of an intermediate temperature layer, and hot water of a low temperature layer in a laminated state. Further, if this bath chasing operation is continued, the amount of hot water in the upper part of the hot water storage tank 101 decreases, and the amount of intermediate hot water accumulated below it increases.

この中温湯の増大現象は種々の弊害を招き、大きくは沸き上げ動作時におけるヒートポンプの沸き上げ効率(COP効率、熱交換器104出口の湯水温度を熱交換器104入口の湯水温度で除した値)の低下に関与する。すなわち、貯湯タンク101の下部に中温湯が増加すると沸き上げ時の熱交換器104の入水温度が高い状態で冷媒回路106を循環する冷媒と熱交換することになり、冷媒と温水との温度差が減少して沸き上げ効率が低下する。特に、冷媒として二酸化炭素を用いたヒートポンプサイクルにあっては、ヒートポンプの高圧側圧力が高いため入水温度が高くなるとヒートポンプの沸き上げ効率(COP効率)の低下度合いが顕著となる。さらに、中温湯が増加することにより、貯湯タンク101の上部高温水が減少するだけでなく全体として貯湯能力が低下するので、湯量不足による湯切れにつながる。   This phenomenon of increase in medium-temperature hot water has various adverse effects, and is largely the boiling efficiency of the heat pump during boiling operation (COP efficiency, the value obtained by dividing the hot water temperature at the outlet of the heat exchanger 104 by the hot water temperature at the inlet of the heat exchanger 104). ). That is, when the hot water increases in the lower part of the hot water storage tank 101, heat exchange is performed with the refrigerant circulating in the refrigerant circuit 106 in a state where the incoming water temperature of the heat exchanger 104 at the time of boiling is high, and the temperature difference between the refrigerant and the hot water Decreases and the boiling efficiency decreases. In particular, in a heat pump cycle using carbon dioxide as a refrigerant, since the high pressure on the high pressure side of the heat pump is high, the degree of decrease in the boiling efficiency (COP efficiency) of the heat pump becomes significant when the incoming water temperature increases. Furthermore, since the hot water in the upper part of the hot water storage tank 101 is reduced as a result of the increase in the hot water temperature, the hot water storage capacity is reduced as a whole, leading to a lack of hot water due to a shortage of hot water.

そこで、本実施の形態ではこの中温湯対策として、貯湯タンク101の略中間部に中間出湯管112を設け、この中間出湯管112と上部出湯管111より供給される湯水を混合し所定の混合水を得るための第1混合弁120を設け、第1温度検出器121で検出さ
れる湯温をフィードバックすることで弁開度の調節を行い所定の目標温度を確保するようにしている。この第1混合弁120を設けたことにより、中温湯を優先的に取り出して使用目的に応じた湯温を給湯することが可能となり、貯湯タンク101内の中温湯を減少させることができる。
Therefore, in the present embodiment, as a measure against the hot water, an intermediate hot water pipe 112 is provided at a substantially intermediate portion of the hot water storage tank 101, and hot water supplied from the intermediate hot water pipe 112 and the upper hot water pipe 111 is mixed to obtain a predetermined mixed water. The first mixing valve 120 is provided to obtain the desired temperature, and the valve opening is adjusted by feeding back the hot water temperature detected by the first temperature detector 121 to ensure a predetermined target temperature. By providing the first mixing valve 120, it is possible to preferentially take out the hot water and supply hot water according to the purpose of use, thereby reducing the hot water in the hot water storage tank 101.

前記第1混合弁120の出力側には用途に応じた負荷側回路が構成され、まず給湯利用として、第1混合弁120からの混合水と給水管105からの水とを混合し設定温度の湯水を得るための負荷側混合弁の1つである給湯混合弁122を設け、カラン124に供給するようにしている。この給湯混合弁122の出力側には給湯温度検出器123が取り付けられ、給湯温度検出器123で検出される湯温をフィードバックすることで弁開度の調節を行い、設定温度を確保するようにしている。   On the output side of the first mixing valve 120, a load-side circuit corresponding to the application is configured. First, as hot water use, the mixed water from the first mixing valve 120 and the water from the water supply pipe 105 are mixed to set the set temperature. A hot water supply mixing valve 122 which is one of the load side mixing valves for obtaining hot water is provided and supplied to the currant 124. A hot water supply temperature detector 123 is attached to the output side of the hot water supply mixing valve 122, and the valve opening is adjusted by feeding back the hot water temperature detected by the hot water supply temperature detector 123 to ensure a set temperature. ing.

また、風呂利用としては、第1混合弁120からの混合水と給水管105からの水とを混合し設定温度の湯水を得るための負荷側混合弁の1つである風呂混合弁125を設け、注湯弁126を介して風呂循環回路119に接続し浴槽113への湯張りを行うようにしている。この風呂混合弁125の出力側には風呂温度検出器127が取り付けられ、風呂温度検出器127で検出される湯温をフィードバックすることで弁開度の調節を行い、設定温度を確保するようにしている。   For bath use, a bath mixing valve 125 is provided as one of the load side mixing valves for mixing the mixed water from the first mixing valve 120 and the water from the water supply pipe 105 to obtain hot water at a set temperature. The bath 113 is connected to the bath circulation circuit 119 via the pouring valve 126 to fill the bathtub 113 with hot water. A bath temperature detector 127 is attached to the output side of the bath mixing valve 125, and the valve opening is adjusted by feeding back the hot water temperature detected by the bath temperature detector 127 so as to ensure the set temperature. ing.

なお、第1混合弁120の上部出湯管111から高温湯が供給される高温側入水経路と中間出湯管112から中温湯が供給される低温側入水経路は、高温側入水経路の流路抵抗が大きくなるように逆止弁128を配設している。また、逆止弁128と同様の特性を有するものとして、給湯混合弁122及び風呂混合弁125の湯側供給経路にも逆止弁129、130を設けるとともに、給湯混合弁122の出力側には逆止弁131を設けている。   Note that the high-temperature side water intake passage through which the high temperature hot water is supplied from the upper hot water discharge pipe 111 of the first mixing valve 120 and the low temperature side water supply passage through which the intermediate hot water is supplied from the intermediate hot water discharge pipe 112 have a flow resistance of the high temperature side water intake path. A check valve 128 is disposed so as to increase. Further, as having the same characteristics as the check valve 128, check valves 129 and 130 are provided in the hot water supply path of the hot water mixing valve 122 and the bath mixing valve 125, and the output side of the hot water mixing valve 122 is provided on the output side. A check valve 131 is provided.

これら逆止弁128、129、130は、図2に示すように順方向に対して所定流量までは止水機能を有し、それ以上の流量に対しては開放状態となり、逆方向に対しては閉止機能を有するものである。この順方向の止水機能を利用することで、第1混合弁120、給湯混合弁122、風呂混合弁125が動作を開始する流量以下の少量の給湯使用があった場合に止水機能が作用するため、それぞれの混合弁に供給される高温湯が流入することもなく、高温出湯の危険も回避できるものである。このように、高温側入水経路に所定条件で流路抵抗が増大する逆止弁128、129、130を配設することにより、安全性の高い給湯を行うことができるものである。   These check valves 128, 129, and 130 have a water stop function up to a predetermined flow rate in the forward direction as shown in FIG. Has a closing function. By utilizing this forward water stop function, the water stop function is activated when there is a small amount of hot water use below the flow rate at which the first mixing valve 120, the hot water supply mixing valve 122, and the bath mixing valve 125 start operating. Therefore, the hot water supplied to each mixing valve does not flow in, and the danger of hot hot water can be avoided. In this way, hot water can be supplied with high safety by disposing the check valves 128, 129, and 130 whose flow path resistance increases under a predetermined condition in the high temperature side water intake path.

また、カラン124の近傍には給湯リモコン132、浴室には風呂リモコン133が設けられている。この給湯リモコン132または風呂リモコン133からの運転指示(給湯される湯水の設定温度も含む)は機器本体側に設けられた制御部134に無線または有線で送られ、送信された条件に従って制御部134で予め規定された制御動作に基づいて各種動作を行うようにしている。制御部134は、第1混合弁120や給湯混合弁122、風呂混合弁125の弁開度を制御する。   A hot water remote controller 132 is provided in the vicinity of the currant 124, and a bath remote controller 133 is provided in the bathroom. An operation instruction (including a set temperature of hot water to be supplied with hot water) from the hot water remote controller 132 or the bath remote controller 133 is sent wirelessly or by wire to a control unit 134 provided on the apparatus body side, and the control unit 134 is transmitted according to the transmitted conditions. Various operations are performed based on the control operations defined in advance. The control unit 134 controls the valve openings of the first mixing valve 120, the hot water supply mixing valve 122, and the bath mixing valve 125.

ところで、使用者によりカラン124や注湯弁126が開けられた時、貯湯タンク101の上部に貯えられた高温の湯水は、出湯管111を通じて取り出され、逆止弁128を介して第1混合弁120へ流される。第1混合弁120では、貯湯タンク101の中温位置と接続する中間出湯管112を通じて取り出された中間温度の温水(中温湯)と貯湯タンク101の上部に貯えられた高温水とが混合される。   By the way, when the user opens the currant 124 or the pouring valve 126, the hot hot water stored in the upper portion of the hot water storage tank 101 is taken out through the hot water discharge pipe 111, and the first mixing valve is passed through the check valve 128. 120. In the first mixing valve 120, the intermediate temperature hot water (medium temperature hot water) taken out through the intermediate hot water pipe 112 connected to the intermediate temperature position of the hot water storage tank 101 and the high temperature water stored in the upper part of the hot water storage tank 101 are mixed.

そして、混合された湯水は給湯混合弁122側または風呂混合弁125側へ分岐する。混合された湯水が給湯混合弁122側へ流れる場合、逆止弁129を介して給湯混合弁1
22へ流入する。また、給湯混合弁122へは給水管105から供給された水道水が流入する。給湯混合弁122では、それぞれ流入する湯水を任意の温度となるような比率で混合し、給湯混合弁122と給湯温度検出器123との間の管上に設けた逆止弁131を通じてカラン124から給湯される。
The mixed hot water branches to the hot water supply mixing valve 122 side or the bath mixing valve 125 side. When the mixed hot water flows to the hot water supply mixing valve 122 side, the hot water supply mixing valve 1 is connected via the check valve 129.
22 flows in. Further, tap water supplied from the water supply pipe 105 flows into the hot water supply mixing valve 122. In the hot water supply mixing valve 122, the hot water flowing in each is mixed at a ratio so as to reach an arbitrary temperature, and from the currant 124 through the check valve 131 provided on the pipe between the hot water mixing valve 122 and the hot water temperature detector 123. Hot water is supplied.

なお、カラン124への給湯要求量が微量である場合は、逆止弁128により貯湯タンク101の上部にある高温湯がごく少量(あるいは遮断)となるので、カラン124から給湯リモコン132による設定温度以上の給湯が行われず、快適な給湯が行われる。また、給湯が停止された後も、逆止弁128により高温湯が中温側へ廻りこむ対流現象が起きることなく、逆止弁128で遮断される。逆止弁128は、所定流量以下の貯湯タンク101から第1混合弁120方向への流れを遮断するが、約10g前後までの加重分を遮断できることが好ましい。なぜなら、10gを大きく下回る加重分した遮断できなければ、高温湯と中温湯との温度差による比重の違いにより高温湯が中温側へ廻りこむ対流現象を防ぐことができないからである。逆に、10gを大きく上回る加重分の流量を遮断できるようにすれば、容易に高温を混合することができず、高温の給湯が行えなくなる。   When the amount of hot water supply to the currant 124 is very small, the check valve 128 makes a very small amount (or cut off) of the hot water at the top of the hot water storage tank 101, so the temperature set by the hot water remote controller 132 from the currant 124 is set. The above hot water supply is not performed and comfortable hot water supply is performed. In addition, even after the hot water supply is stopped, the check valve 128 is shut off by the check valve 128 without causing a convection phenomenon in which the high-temperature hot water moves to the middle temperature side. The check valve 128 blocks the flow from the hot water storage tank 101 having a predetermined flow rate or less toward the first mixing valve 120, but it is preferable that the load up to about 10 g can be blocked. This is because the convection phenomenon in which the high temperature hot water moves to the intermediate temperature side due to the difference in specific gravity due to the temperature difference between the high temperature hot water and the intermediate temperature hot water cannot be prevented unless the weighted portion can be cut off significantly below 10 g. On the other hand, if the flow rate corresponding to a load greatly exceeding 10 g can be cut off, high temperatures cannot be easily mixed, and high temperature hot water supply cannot be performed.

一方、第1混合弁120で混合された湯水が風呂混合弁125側へ流れる場合、逆止弁129を介して風呂混合弁125へ流入する。また、風呂混合弁125へは給水管105から供給された水道水が流入する。風呂混合弁125では、それぞれ流入する湯水を任意の温度となるような比率で混合し、注湯弁126により流量を調整しながら風呂へ湯水を給水する。   On the other hand, when the hot and cold water mixed by the first mixing valve 120 flows to the bath mixing valve 125 side, it flows into the bath mixing valve 125 via the check valve 129. Further, tap water supplied from the water supply pipe 105 flows into the bath mixing valve 125. The bath mixing valve 125 mixes the flowing hot water and water at an arbitrary temperature, and supplies hot water to the bath while adjusting the flow rate with the hot water supply valve 126.

なお、カラン124への給湯と、浴槽113への給湯を個別説明したが、第1混合弁120で混合された湯水を給湯混合弁122側と風呂混合弁125側との両方へ流れるようにして、同時給湯を行うことも可能である。   In addition, although the hot water supply to the currant 124 and the hot water supply to the bathtub 113 were explained separately, the hot water mixed by the 1st mixing valve 120 was made to flow to both the hot water supply mixing valve 122 side and the bath mixing valve 125 side. It is also possible to perform simultaneous hot water supply.

例えば、浴槽113への給湯を行っている途中にカラン124への給湯が要求されたとき、それまで閉じていた給湯混合弁122のd側を開とする。すると、第1混合弁120を流れ出た湯水は給湯混合弁122側と風呂混合弁125側の両方側へ流れるようになる。   For example, when hot water supply to the currant 124 is requested during hot water supply to the bathtub 113, the d side of the hot water supply mixing valve 122 that has been closed is opened. Then, the hot water flowing out of the first mixing valve 120 flows to both the hot water supply mixing valve 122 side and the bath mixing valve 125 side.

また、カラン124への給湯を行っている途中に浴槽113への給湯が要求されたとき、それまで閉じていた風呂混合弁125のg側を開とする。ただし、カラン124への給湯量に対して浴槽113への給湯量は圧倒的に多いことが一般的である。そのため、浴槽113への給湯が要求された瞬間には、多量の湯水が浴槽113へ流れるので、カラン124への給湯量は減少し、給湯混合弁122のd側に流れる湯量が減少する。その結果、給湯混合弁122のd側に流れる湯水と給水管105からの水道水との量的バランスが崩れ、給湯混合弁122の混合比率を変更しなければならない。具体的には、給湯混合弁122のd側に流れる湯量が減少するので、制御部134はd側に流れる湯量を多く取り入れるような混合比率となるように給湯混合弁122の弁開度を制御する。   When hot water supply to the bathtub 113 is requested during hot water supply to the currant 124, the g side of the bath mixing valve 125 that has been closed is opened. However, the amount of hot water supplied to the bathtub 113 is generally overwhelmingly larger than the amount of hot water supplied to the currant 124. Therefore, since a large amount of hot water flows into the bathtub 113 at the moment when hot water supply to the bathtub 113 is requested, the amount of hot water supplied to the currant 124 decreases and the amount of hot water flowing to the d side of the hot water mixing valve 122 decreases. As a result, the quantitative balance between the hot water flowing to the d side of the hot water supply mixing valve 122 and the tap water from the water supply pipe 105 is lost, and the mixing ratio of the hot water supply mixing valve 122 must be changed. Specifically, since the amount of hot water flowing to the d side of the hot water mixing valve 122 decreases, the control unit 134 controls the valve opening degree of the hot water mixing valve 122 so that the mixing ratio is such that a large amount of hot water flows to the d side. To do.

以上のように構成された貯湯式給湯装置において、以下、カラン124からの給湯、もしくは浴槽113への給湯が一旦停止した後、カラン124の栓がわずかに開状態となり、カラン124から微量の湯水が流れ出ている場合を説明する。このとき、湯水流量が微量であるために流れが検出されず、給湯混合弁122の弁開度を制御して湯水温度を調整することはない。したがって、カラン124から流れる微量の湯水温度は、給湯リモコン132を用いて設定された設定温度に影響を受け、設定温度が高くなるほど給湯混合弁122のd側に高温の湯水が供給され、その分微量に流れ出る湯水の温度も高くなる。   In the hot water storage type hot water supply apparatus configured as described above, after hot water supply from the currant 124 or hot water supply to the bathtub 113 is temporarily stopped, the plug of the currant 124 is slightly opened, and a small amount of hot water is supplied from the currant 124. A case where the flow is flowing out will be described. At this time, since the flow rate of hot water is very small, no flow is detected, and the valve opening degree of the hot water supply mixing valve 122 is not controlled to adjust the hot water temperature. Therefore, the temperature of a small amount of hot water flowing from the currant 124 is affected by the set temperature set using the hot water supply remote controller 132, and hot water is supplied to the d side of the hot water mixing valve 122 as the set temperature increases. The temperature of the hot water flowing out in a minute amount also increases.

そこで、給湯温度検出器123が所定温度(給湯リモコン132により設定された設定
温度に一定値(例えば5度)を加算した値)を検出したとき、給湯混合弁122の弁開度を給湯混合弁122のe側(水道水側)の弁開度を制御し、水道水が混合される混合比率を高めるようにする。このようにすれば、ある一定以上の高温の湯水がカラン124から流れ出ることがなく、安全性を高めることができる。なお、給湯混合弁122における水道水の混合量の程度は、水道水がある割合で増加するように混合してもよいし、高温の湯水が一切混ざらないような混合比率であってもよい。
Therefore, when the hot water temperature detector 123 detects a predetermined temperature (a value obtained by adding a constant value (for example, 5 degrees) to the set temperature set by the hot water remote controller 132), the valve opening degree of the hot water mixing valve 122 is determined as the hot water mixing valve. The valve opening degree of 122 on the e side (tap water side) is controlled to increase the mixing ratio at which tap water is mixed. In this way, hot water of a certain level or higher does not flow out of the currant 124, and safety can be improved. The amount of tap water mixed in the hot water mixing valve 122 may be mixed so that the tap water increases at a certain rate, or may be a mixing ratio such that high-temperature hot water is not mixed at all.

ところで、上記方法では、給湯を行った後にいったん停止して微量給湯を行うまでの間に設定温度がさらに高く再設定された場合において、十分な安全性を得られないことがある。例えば、設定温度を40度としてカラン124から給湯を行った後にいったん停止し、次に微量給湯が行われるまでの間に、設定温度を65度に設定し直したとする。すると、上記方法では70度となるまで給湯混合弁122の弁開度を制御せず、高温の湯水が給湯し続けることになる。そこで、給湯温度検出器123が所定温度(カラン124からの給湯を一旦停止した際に給湯リモコン132により設定された設定温度に一定値(例えば5度)を加算した値)を検出したときに、給湯混合弁122の弁開度を制御すればよい。このようにすれば、たとえ使用者が設定温度を65度に再設定したとしても、給湯温度検出器123が45度を検出したときに、給湯混合弁122の弁開度を給湯混合弁122のe側(水道水側)として、水道水が混合される混合比率を高めるようにするので、安全性を高めることができる。   By the way, in the above method, sufficient safety may not be obtained when the set temperature is reset to a higher level after the hot water is supplied and then temporarily stopped and a minute amount of hot water is supplied. For example, it is assumed that the set temperature is set to 40 degrees, the hot water is temporarily stopped after the hot water is supplied from the currant 124, and the set temperature is reset to 65 degrees until the next minute hot water is supplied. Then, in the above method, the valve opening degree of the hot water supply mixing valve 122 is not controlled until the temperature reaches 70 degrees, and hot hot water continues to be supplied. Therefore, when the hot water temperature detector 123 detects a predetermined temperature (a value obtained by adding a constant value (for example, 5 degrees) to the set temperature set by the hot water remote controller 132 when the hot water from the currant 124 is temporarily stopped) What is necessary is just to control the valve opening degree of the hot water supply mixing valve 122. In this way, even if the user resets the set temperature to 65 degrees, when the hot water temperature detector 123 detects 45 degrees, the valve opening degree of the hot water mixing valve 122 is set to that of the hot water mixing valve 122. As the e side (tap water side), the mixing ratio in which tap water is mixed is increased, so that safety can be improved.

以上のように、本発明は貯湯タンクに蓄積される湯水を浴槽側とカラン側に供給することができる給湯風呂暖房装置において適用できる。   As described above, the present invention can be applied to a hot water bath heater that can supply hot water accumulated in a hot water storage tank to the bathtub side and the currant side.

本発明の実施の形態1における貯湯式給湯装置の構成図The block diagram of the hot water storage type hot water supply apparatus in Embodiment 1 of this invention 逆止弁の特性図Check valve characteristics

符号の説明Explanation of symbols

101 貯湯タンク
105 給水管
106 冷媒回路(ヒートポンプ回路)
111 出湯管
112 中間出湯管
120 第1混合弁
122 給湯混合弁
124 カラン
129、130 逆止弁(流路抵抗)
101 Hot water storage tank 105 Water supply pipe 106 Refrigerant circuit (heat pump circuit)
111 Hot water outlet pipe 112 Intermediate hot water outlet pipe 120 First mixing valve 122 Hot water supply mixing valve 124 Karan 129, 130 Check valve (flow path resistance)

Claims (4)

ヒートポンプ回路を用いて加熱した湯水をタンク上部から成層状態で貯湯し、リモコンにより設定される設定温度の湯水を端末側に給湯する貯湯式給湯装置であって、タンク上部の湯水を取り出す出湯管と、前記出湯管からの湯水と給水管からの水とを混合し所定温度の湯水を端末側に供給する混合弁と、前記混合弁からの湯温を検出する温度検出手段と、前記温度検出手段により検出される温度に基づいて前記混合弁の弁開度を制御して混合比率を可変とする制御手段とを備え、前記制御手段により前記混合弁の弁開度を制御して給湯温度を調整していないときで、かつ前記温度検出手段により検出される温度が所定温度以上となったとき、前記制御手段は給水管からの水の混合比率を大きくするように前記混合弁の弁開度を制御する貯湯式給湯装置。 A hot water storage system that stores hot water heated using a heat pump circuit in a stratified state from the upper part of the tank and supplies hot water at a set temperature set by a remote controller to the terminal side, and a hot water outlet pipe for taking out hot water from the upper part of the tank; A mixing valve that mixes hot water from the outlet pipe and water from the water supply pipe and supplies hot water at a predetermined temperature to the terminal side, temperature detection means for detecting the hot water temperature from the mixing valve, and the temperature detection means Control means for controlling the valve opening degree of the mixing valve based on the temperature detected by the control means to vary the mixing ratio, and adjusting the hot water supply temperature by controlling the valve opening degree of the mixing valve by the control means. When the temperature detected by the temperature detection means is not less than a predetermined temperature, the control means adjusts the valve opening of the mixing valve so as to increase the mixing ratio of water from the water supply pipe. Hot water storage to control Water heater. ヒートポンプ回路を用いて加熱した湯水を貯湯タンク上部から成層状態で貯湯し、リモコンにより設定される設定温度の湯水をカラン側または風呂端末側に供給する貯湯式給湯装置であって、タンク上部の湯水を取り出す出湯管と、前記出湯管からの湯水と給水管からの水とを混合し所定温度の湯水をカラン側に供給する給湯混合弁と、前記出湯管からの湯水と給水管からの水とを混合し所定温度の湯水を風呂端末側に供給する風呂混合弁と、前記給湯混合弁からの湯温を検出する温度検出手段と、前記温度検出手段により検出される温度に基づいて前記給湯混合弁の弁開度を制御して混合比率を可変とする制御手段とを備え、前記制御手段により前記混合弁の弁開度を制御して給湯温度を調整していないときで、かつ前記温度検出手段により検出される温度が所定温度以上となったとき、前記制御手段は給水管からの水の混合比率を大きくするように前記給湯混合弁の弁開度を制御する貯湯式給湯装置。 A hot water supply system that stores hot water heated using a heat pump circuit in a stratified state from the upper part of a hot water storage tank and supplies hot water of a set temperature set by a remote controller to a currant side or a bath terminal side. A hot water supply pipe that takes out the hot water from the hot water supply pipe and water from the water supply pipe and supplies hot water at a predetermined temperature to the currant side, hot water from the hot water supply pipe and water from the water supply pipe A bath mixing valve for supplying hot water at a predetermined temperature to the bath terminal side, temperature detecting means for detecting the hot water temperature from the hot water mixing valve, and the hot water mixing based on the temperature detected by the temperature detecting means Control means for controlling the valve opening degree of the valve to vary the mixing ratio, and when the hot water temperature is not adjusted by controlling the valve opening degree of the mixing valve by the control means, and the temperature detection By means When the temperature detected is equal to or greater than a predetermined temperature, the control means storage type hot water supply device for controlling the valve opening degree of the hot water supply mixing valve so as to increase the mixing ratio of water from the water supply pipe. 所定温度は、リモコンにより設定される設定温度に一定値を加算して得られる値である請求項1または2記載の貯湯式給湯装置。 The hot water storage type hot water supply apparatus according to claim 1 or 2, wherein the predetermined temperature is a value obtained by adding a constant value to a set temperature set by a remote controller. 所定温度は、カラン側への給湯を停止した際の設定温度に一定値を加算して得られる値である請求項3記載の貯湯式給湯装置。 The hot water storage hot water supply apparatus according to claim 3, wherein the predetermined temperature is a value obtained by adding a constant value to a set temperature when hot water supply to the currant side is stopped.
JP2005181954A 2005-06-22 2005-06-22 Hot water storage water heater Expired - Fee Related JP4752347B2 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085012A (en) * 2008-09-30 2010-04-15 Sanyo Electric Co Ltd Water heater
JP2010175198A (en) * 2009-01-30 2010-08-12 Mitsubishi Electric Corp Storage water heater
JP2010175192A (en) * 2009-01-30 2010-08-12 Mitsubishi Electric Corp Storage water heater
JP2010276305A (en) * 2009-05-29 2010-12-09 Rinnai Corp Storage type hot water supply system
JP2011158161A (en) * 2010-01-29 2011-08-18 Daikin Industries Ltd Water heater
JP2011257083A (en) * 2010-06-10 2011-12-22 Panasonic Corp Water heater

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JP2004293837A (en) * 2003-03-26 2004-10-21 Corona Corp Hot-water storage type hot-water supply device
JP2005156053A (en) * 2003-11-27 2005-06-16 Mitsubishi Electric Corp Hot water supply apparatus

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JPH08233367A (en) * 1995-02-24 1996-09-13 Sekisui Chem Co Ltd Automatic temperature setting hot water supply equipment
JP2000227254A (en) * 1999-02-04 2000-08-15 Matsushita Electric Ind Co Ltd Hot water and water mixer
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JP2004011929A (en) * 2002-06-03 2004-01-15 Mitsubishi Electric Corp Water heater and valve unit used for water heater
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085012A (en) * 2008-09-30 2010-04-15 Sanyo Electric Co Ltd Water heater
JP2010175198A (en) * 2009-01-30 2010-08-12 Mitsubishi Electric Corp Storage water heater
JP2010175192A (en) * 2009-01-30 2010-08-12 Mitsubishi Electric Corp Storage water heater
JP2010276305A (en) * 2009-05-29 2010-12-09 Rinnai Corp Storage type hot water supply system
JP2011158161A (en) * 2010-01-29 2011-08-18 Daikin Industries Ltd Water heater
JP2011257083A (en) * 2010-06-10 2011-12-22 Panasonic Corp Water heater

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