JP4654845B2 - Hot water storage water heater - Google Patents
Hot water storage water heater Download PDFInfo
- Publication number
- JP4654845B2 JP4654845B2 JP2005255942A JP2005255942A JP4654845B2 JP 4654845 B2 JP4654845 B2 JP 4654845B2 JP 2005255942 A JP2005255942 A JP 2005255942A JP 2005255942 A JP2005255942 A JP 2005255942A JP 4654845 B2 JP4654845 B2 JP 4654845B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- mixing valve
- temperature
- boiling operation
- mixing
- 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.)
- Expired - Fee Related
Links
Landscapes
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Description
本発明は、貯湯式給湯装置に関するものであり、特に、電動式混合弁を用いた湯水混合制御に関するものである。 The present invention relates to a hot water storage type hot water supply apparatus, and particularly to hot water mixing control using an electric mixing valve.
従来、この種の貯湯式給湯装置は、ヒートポンプ回路で加熱された湯水を貯湯タンクの上部から成層状態で貯湯し、その貯湯された湯水を上部出湯管より取り出し給水管から供給される水と混合して所定の湯温に調節して給湯端末等の負荷側に供給するようにしていた。また、近年、この貯湯水を用いて風呂の追い焚きや暖房に利用する機能を有した貯湯式給湯装置が注目されるようになってきた。しかし、この場合、風呂の追い焚きや暖房に利用した後の温度の低下した湯水は再度貯湯タンク内に回収されるため、貯湯タンク内部には上部の高温水の下方に中温水と呼ばれる中途半端な温度の湯水が多量に蓄えられることになる。この中温水が蓄えられた状態で全量沸き上げ動作が行われると、ヒートポンプ回路への入水温度が高い状態でヒートポンプサイクルの加熱動作が行われるため、効率の悪い、いわゆるCOPの低い沸き上げ動作となる。 Conventionally, this type of hot water storage type hot water supply device stores hot water heated by a heat pump circuit in a stratified state from the upper part of the hot water storage tank, and the hot water stored in the hot water storage tank is taken out from the upper hot water discharge pipe and mixed with the water supplied from the water supply pipe. Then, it is adjusted to a predetermined hot water temperature and supplied to a load side such as a hot water supply terminal. Further, in recent years, hot water storage type hot water supply devices having a function of using this hot water storage for bathing and heating are drawing attention. However, in this case, the hot water whose temperature has dropped after being used for bathing or heating is collected again in the hot water storage tank, so the hot water inside the hot water tank is called halfway hot water below the upper hot water. A large amount of hot and cold water will be stored. When the whole amount boiling operation is performed in a state where the medium-temperature water is stored, the heating operation of the heat pump cycle is performed in a state where the incoming water temperature to the heat pump circuit is high. Become.
そこで、この対策として特許文献1に開示されているように、貯湯タンクの中間部に中温水の取り出し口を設け、この取り出し口より取り出された中温水と上部出湯管より取り出された高温水を混合して所定の湯温を確保し、さらに、この混合水と給水管より供給される水を混合することで設定温度の湯水を精度よく得るようにしていた。この方法によれば中温水を積極的に取り出すことができるため、貯湯タンク下方には低温水を確保することができるとともに、貯湯タンク上方の高温水の使用を最小限に抑えることができ、高COPの沸き上げ動作と湯切れ現象の抑制を図ることができるものである。
しかしながら、上記従来の構成によれば、ヒートポンプ回路を用いた給湯装置において、中温水の沸き上げ性能への影響を排除するため優先的に中温水を利用する手段を設けたことにより、貯湯タンク下方には低温水を確保することができるとともに、貯湯タンク上方の高温水の使用を最小限に抑えることができ、高COPの沸き上げ動作と湯切れ現象の抑制を図ることができ、ヒートポンプ式給湯装置の湯水利用形態としては極めて有効な手段ではあるが、一方、停電等により貯湯タンク内の湯水の利用が長時間停滞し、貯湯タンク内の湯水の温度が低下してくると、雑菌の繁殖が起こる恐れがあり、特に、レジオネラ菌が繁殖すると人体に危害を及ぼす恐れがある。このレジオネラ菌は湯温が25℃〜50℃の範囲で活発に活動し、この湯温範囲は上記停電状態において貯湯タンクの下部で発生しやすい現象となる。このような状態において中温水の利用手段を用いて湯水を供給すると繁殖したレジオネラ菌等の雑菌を積極的に利用側端末に供給することになり、衛生面で課題を有するものであった。 However, according to the above conventional configuration, in the hot water supply apparatus using the heat pump circuit, by providing means for using the medium temperature water preferentially in order to eliminate the influence on the boiling performance of the medium temperature water, Can secure low-temperature water, minimize the use of high-temperature water above the hot water storage tank, and can control the boiling operation of high COP and the phenomenon of running out of hot water. Although it is an extremely effective means of using hot water in the equipment, if the use of hot water in the hot water tank stagnates for a long time due to a power failure, etc., and the temperature of the hot water in the hot water tank decreases, breeding of germs In particular, there is a risk of harm to the human body when Legionella is propagated. This Legionella bacterium is active in a range of hot water temperature of 25 ° C. to 50 ° C., and this hot water temperature range is a phenomenon that is likely to occur in the lower part of the hot water storage tank in the power outage state. In such a state, if hot water is supplied using the means for using medium-temperature water, the proliferated bacteria such as Legionella bacteria are actively supplied to the user terminal, which has a problem in terms of hygiene.
本発明は、上記従来の課題を解決するもので、ヒートポンプ式給湯装置の湯水利用形態として極めて有効な手段である中温水を優先的に使用可能な湯水混合制御方法を提供しつつ、停電等で湯水の利用が停滞したときの安全性を確保した貯湯式給湯装置の提供を目的とするものである。 The present invention solves the above-described conventional problems, and provides a hot water mixing control method capable of preferentially using medium-temperature water, which is an extremely effective means for using hot water in a heat pump type hot water supply apparatus, while preventing power outages and the like. The purpose of the present invention is to provide a hot water storage type hot water supply device that ensures safety when the use of hot water is stagnant.
上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、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その湯水を利用して端末側に所望の湯水を供給する貯湯式給湯装置において、タンク上部の湯水を取り出す出湯管と、タンクの略中間部の湯水を取り出す中温出湯管と、タンク下部に水道水を供給する給水管と、前記給水管と前記中温出湯管からの湯水を混合する第1混合弁と、前記第1混合弁からの湯水と前記出湯管からの高温水を混合し所定温度の湯水を端末側に供給する利用側混合弁と、前記第1混合弁と利用側混合弁の弁開度制御を行う制御部とを備え、全量沸き上げ運転を行う時間帯を設定するとともに、湯量不足を判断したとき湯切れ沸き上げ運転を行うことを設定した貯湯式給湯装置であって、前記制御部は、停電が発生しその後復帰したとき、前記第1混合弁を、前記給水管側に全開状態となるように駆動させることを特徴とするものである。 In order to solve the above conventional problems, the hot water storage type hot water supply apparatus of the present invention stores hot water heated using a heat pump circuit in a stratified state from the upper part of the tank, and supplies desired hot water to the terminal side using the hot water. A hot water storage pipe for taking out hot water at the upper part of the tank, an intermediate hot hot water pipe for taking out hot water at a substantially intermediate part of the tank, a water supply pipe for supplying tap water to the lower part of the tank, the water supply pipe and the intermediate temperature hot water A first mixing valve for mixing hot water from a pipe, a use side mixing valve for mixing hot water from the first mixing valve and hot water from the outlet pipe and supplying hot water at a predetermined temperature to the terminal side, 1 Mixing valve and a control unit that controls the opening degree of the use-side mixing valve are set, and the time zone for performing the full boiling operation is set, and when the lack of hot water is determined, the hot water boiling operation is set. With a hot water storage type hot water supply device It, wherein, when a power failure then occurred return, the first mixing valve, is characterized in that the driving so that the fully open state to the water supply pipe side.
上記発明によれば、停電により貯湯タンク内の湯水の利用が長時間停滞した後の停電復帰時の湯水利用形態として、中温出湯管からの湯水供給を行わないように第1混合弁の制御を禁止するようにしているため、停電期間中に貯湯タンク内の湯水が停滞し、貯湯タンク下部で温度低下が起こってレジオネラ菌等の雑菌が繁殖したとしても、貯湯タンク上部の比較的高温の湯水から利用することができ、雑菌の影響を受けることなく湯水供給が可能となる。 According to the above invention, as a hot water use mode at the time of power failure recovery after the hot water usage in the hot water storage tank has been stagnated for a long time due to a power failure, the first mixing valve is controlled so as not to supply hot water from the intermediate temperature hot water pipe. Even if hot water in the hot water tank stagnates during the power outage and the temperature drops in the lower part of the hot water tank and miscellaneous bacteria such as Legionella propagates, the hot water in the upper part of the hot water tank The hot water can be supplied without being affected by various bacteria.
本発明の貯湯式給湯装置は、ヒートポンプ式給湯装置の湯水利用形態として極めて有効な手段である中温水を優先的に使用可能な湯水混合制御方法を提供しつつ、停電等で湯水の利用が停滞したときの安全性を確保した貯湯式給湯装置を提供することができる。 The hot water storage type hot water supply apparatus of the present invention provides a hot water mixing control method capable of preferentially using medium hot water, which is an extremely effective means as a hot water use form of a heat pump type hot water supply apparatus, while the use of hot water is stagnant due to a power failure or the like. Therefore, it is possible to provide a hot water storage type hot water supply apparatus that ensures safety when the operation is performed.
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その湯水を利用して端末側に所望の湯水を供給する貯湯式給湯装置において、タンク上部の湯水を取り出す出湯管と、タンクの略中間部の湯水を取り出す中温出湯管と、タンク下部に水道水を供給する給水管と、前記給水管と前記中温出湯管からの湯水を混合する第1混合弁と、前記第1混合弁からの湯水と前記出湯管からの高温水を混合し所定温度の湯水を端末側に供給する利用側混合弁と、前記第1混合弁と利用側混合弁の弁開度制御を行う制御部とを備え、全量沸き上げ運転を行う時間帯を設定するとともに、湯量不足を判断したとき湯切れ沸き上げ運転を行うことを設定した貯湯式給湯装置であって、前記制御部は、停電が発生しその後復帰したとき、前記第1混合弁を、前記給水管側に全開状態となるように駆動させることを特徴とするものである。 A first aspect of the present 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 the tank and supplies the desired hot water to the terminal side using the hot water. A hot water pipe, an intermediate temperature hot water pipe for taking out hot water at a substantially middle part of the tank, a water supply pipe for supplying tap water to the lower part of the tank, a first mixing valve for mixing hot water from the water supply pipe and the intermediate temperature hot water pipe, A use side mixing valve that mixes hot water from the first mixing valve and hot water from the outlet pipe and supplies hot water at a predetermined temperature to the terminal side, and valve opening control of the first mixing valve and use side mixing valve A hot water storage type hot water supply apparatus that sets a time zone for performing a full-boiling operation, and sets a hot water boiling-up operation when it is determined that the amount of hot water is insufficient. A power failure occurs and then returns When in the first mixing valve, is characterized in that the driving so that the fully open state to the water supply pipe side.
そして、停電により貯湯タンク内の湯水の利用が長時間停滞した後の停電復帰時の湯水利用形態として、中温出湯管からの湯水供給を行わないように第1混合弁の制御を禁止するようにしているため、停電期間中に貯湯タンク内の湯水が停滞し、貯湯タンク下部で温度低下が起こってレジオネラ菌等の雑菌が繁殖したとしても、貯湯タンク上部の比較的高温の湯水から利用することができ、雑菌の影響を受けることなく湯水供給が可能となる。 Then, as a hot water usage mode at the time of power failure recovery after the hot water usage in the hot water storage tank has been stagnated for a long time due to a power failure, the control of the first mixing valve is prohibited so as not to supply hot water from the intermediate temperature hot water pipe. Therefore, even if hot water in the hot water tank stagnates during the power outage and the temperature drops at the lower part of the hot water tank and miscellaneous bacteria such as Legionella propagate, the hot water in the upper part of the hot water tank should be used. It is possible to supply hot water without being affected by bacteria.
また、制御部は停電復帰時に第1混合弁を水側全開状態とし、中温出湯管からの湯水供給を禁止するようにしたことを特徴とするものである。 Further, the control unit is characterized in that when the power failure is restored, the first mixing valve is fully opened in the water side so as to prohibit the hot water supply from the intermediate temperature hot water pipe.
そして、停電が発生しその後復帰したときは、タンク上部の出湯管からのみ湯水を供給するように第1混合弁を水側全開状態としているため、貯湯タンク下部で繁殖した雑菌が利用側端末に供給されることを抑制するとができる。つまり、雑菌が繁殖しやすい温度分布となる貯湯タンク下部に近い中温出湯管からの湯水供給を禁止するようにしているため、雑菌が利用側端末に供給されることがなく、中温出湯管より上の雑菌が繁殖しにくい比較的高温の湯水を利用して利用側混合弁により所望の湯温に調節して使用することで所定量の湯水を確保することができる。 And when a power failure occurs and then returns, the first mixing valve is fully open so that hot water is supplied only from the hot water pipe at the top of the tank. It is possible to suppress the supply. In other words, since the hot water supply from the middle temperature hot water pipe near the bottom of the hot water storage tank, where the temperature distribution is easy for breeding of bacteria, is prohibited, the bacteria will not be supplied to the terminal on the user side and above the medium temperature hot water pipe. A predetermined amount of hot and cold water can be ensured by using a relatively high temperature hot water that is difficult for the bacteria to propagate and adjusting to a desired hot water temperature using a use-side mixing valve.
第2の発明は、制御部は、停電復帰後、全量沸き上げ運転の完了が確認されたとき、第1混合弁の湯水混合制御を復帰させるようにしたことを特徴とするものである。 According to a second aspect of the present invention, the control unit is configured to return the hot water / water mixing control of the first mixing valve when the completion of the full boiling operation is confirmed after the power failure is restored.
そして、停電復帰後の深夜時間帯に貯湯タンクの全量が沸き上げられ、貯湯タンク下部の湯温が雑菌が死滅する温度、例えば65℃になると、通常の湯水混合制御を行うように復帰させているため、停電期間中に繁殖した雑菌は死滅し、その後、安全な状態で中温水を優先的に利用する湯水混合制御により効果的な湯水供給を行うことができる。 When the total amount of the hot water tank is boiled in the midnight time zone after the power failure is restored and the hot water temperature at the lower part of the hot water tank reaches a temperature at which various germs are killed, for example, 65 ° C., the normal hot water mixing control is performed. Therefore, the germs that proliferated during the power outage are killed, and then effective hot water supply can be performed by hot water mixing control that preferentially uses medium-temperature water in a safe state.
第3の発明は、制御部は、停電復帰のタイミングが湯切れ沸き上げ運転を行う時間帯の場合、最初の全量沸き上げ運転の時間帯が経過した後の湯切れ沸き上げ運転を行う時間帯になってから、第1混合弁の湯水混合制御を復帰させるようにしたことを特徴とするものである。 According to a third aspect of the present invention, when the timing of recovery from a power failure is a time zone in which the hot water boiling operation is performed, the control unit performs a hot water boiling operation after the first full amount boiling operation time has elapsed. Then, the hot water / water mixing control of the first mixing valve is restored .
そして、停電復帰のタイミングが貯湯タンク内の一部の湯量を沸き上げる湯切れ沸き上げ運転を行う昼間時間帯の場合は、停電が復帰した後の最初の全量沸き上げ運転を行う夜間時間帯が経過した後の昼間時間帯になってから、第1混合弁の制御禁止を解除するようにしたもので、停電復帰時は第1混合弁の制御を禁止して中温出湯管からの湯水の供給を禁止するため、停電期間中に貯湯タンク下部に繁殖したレジオネラ菌等の雑菌の流出を防止することができ、夜間時間帯を経過することで貯湯タンク下部の湯水を含むタンク全量をレジオネラ菌が死滅する65℃以上の湯温に沸き上げることができ、この全量沸き上げ運転の時間帯を経過した後に第1混合弁の制御を用いて湯水混合制御を行うことで、レジオネラ菌等の雑菌が存在しない状態で効果的な湯水利用形態を確保することができる。 And, if the power failure recovery timing is the daytime time zone when the hot water boiling operation is performed to boil some hot water in the hot water storage tank, the night time zone when the first full boiling operation after the power failure is restored is After the daytime has elapsed, the control prohibition of the first mixing valve is canceled after the daytime has elapsed, and when the power is restored, the control of the first mixing valve is prohibited and hot water is supplied from the medium temperature hot water outlet. To prevent the outflow of Legionella bacteria and other germs that propagated in the lower part of the hot water tank during a power outage, and the Legionella bacteria It can be boiled to a temperature of 65 ° C or higher, and after the time period for the total boiling operation has elapsed, hot water mixing control is performed using the control of the first mixing valve, so that various bacteria such as Legionella bacteria can be obtained. not exist It is possible to ensure an effective hot water use mode in state.
第4の発明は、制御部は、停電復帰のタイミングが全量沸き上げ運転を行う時間帯の場合、次回の全量沸き上げ運転の時間帯が経過した後の湯切れ沸き上げ運転を行う時間帯になってから、第1混合弁の湯水混合制御を復帰させるようにしたことを特徴とするものである。 According to a fourth aspect of the present invention, when the timing of recovery from a power failure is a time zone in which a full amount boiling operation is performed, the control unit is in a time zone in which a hot water boiling operation is performed after the next full amount boiling operation time period has elapsed. Then, the hot water / water mixing control of the first mixing valve is restored .
そして、全量沸き上げ運転を行う夜間時間帯に停電が復帰した場合は、復帰時の全量沸き上げ運転でタンク全量を沸き上げることが不可能な場合も想定されるため、この場合は、次回の全量沸き上げ運転を行う夜間時間帯が経過するまで第1混合弁の制御を禁止状態とし、次回の夜間時間帯で全量沸き上げ運転が完了した後、第1混合弁の制御を用いて湯水混合制御を行うことで、レジオネラ菌等の雑菌が存在しない状態で効果的な湯水利用形態を確保するようにしている。 And if the power failure is restored during the night time when full-boiling operation is performed, it may be impossible to boil up the entire tank in the full-boiling operation at the time of return. The control of the first mixing valve is prohibited until the nighttime period during which the entire amount is heated, and after the entire boiling operation is completed in the next nighttime period, hot water mixing is performed using the control of the first mixing valve. By performing the control, an effective hot water usage form is ensured in the absence of bacteria such as Legionella.
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である。
(Embodiment 1)
FIG. 1 is a configuration diagram of a hot water storage type hot water supply apparatus according to a first embodiment of the present invention.
貯湯タンク101には下部と上部を連通させた沸き上げ配管102を設け、その途中に沸き上げポンプ103と熱交換器104を配設している。この沸き上げ経路によって貯湯タンク101下部の水は、沸き上げポンプ103によって熱交換器104に導かれ、その熱交換器104を通過する過程で加熱されて湯となり、貯湯タンク101上部に導かれる。貯湯タンク101に供給された湯は貯湯タンク101内でその比重差から湯が上部、水が下部に分離し、湯が押し下げられる形で層を成して蓄積される。貯湯タンク101内の湯が使用されると、それに伴い給水管105から貯湯タンク101内に水が給水され、貯湯タンク101内には使用状況に応じて減量した高温の湯が上部に、給水管105より供給された水が下部に分離した状態で貯留される。 The hot water storage tank 101 is provided with a boiling pipe 102 in which a lower part and an upper part are communicated with each other, and a boiling pump 103 and a heat exchanger 104 are provided in the middle thereof. The water in the lower part of the hot water storage tank 101 is guided to the heat exchanger 104 by the boiling pump 103 through this boiling path, and heated in the process of passing through the heat exchanger 104 to become hot water, and is guided to the upper part of the hot water storage tank 101. The hot water supplied to the hot water storage tank 101 is accumulated in layers in the hot water storage tank 101 in such a manner that the hot water is separated into the upper part and the water is separated into the lower part due to the difference in specific gravity. When the hot water in the hot water storage tank 101 is used, water is supplied from the water supply pipe 105 into the hot water storage tank 101, and the hot water reduced in accordance with the use state is placed in the hot water storage tank 101 at the upper part. The water supplied from 105 is stored in a separated state at the bottom.
また、熱交換器104の熱源となるヒートポンプ回路106は、圧縮機107、膨張弁108、ファン109による強制空冷式の蒸発器110で構成され、冷媒として二酸化炭素を用い、高圧側では臨界圧を越える状態で運転することで90℃に近い高温水を貯湯することができるとともに、レジオネラ菌などを考慮した65℃程度の温水の貯湯は高いCOPで行うことができるものである。 The heat pump circuit 106 serving as a heat source for the heat exchanger 104 is composed of a compressor 107, an expansion valve 108, and a forced air-cooled evaporator 110 using a fan 109. Carbon dioxide is used as a refrigerant, and a critical pressure is set on the high-pressure side. It is possible to store hot water close to 90 ° C. by operating in a temperature exceeding that, and hot water storing about 65 ° C. considering Legionella bacteria can be performed at a high COP.
次に、貯湯タンク101内の湯水を負荷側に供給するための利用側回路構成について説明すると、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水を取り出す中間出湯管112を設けている。 Next, a use side circuit configuration for supplying hot water in the hot water storage tank 101 to the load side will be described. 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 the hot water discharge pipe 111 and the water supply pipe 105 are provided. An intermediate hot water discharge pipe 112 for taking out the medium-temperature water is provided at a substantially intermediate portion.
出湯管111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と接続し循環ポンプ115を介して貯湯タンク101の下部に接続した風呂利用回路116が設けられており、前記風呂熱交換器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。上記構成により、貯湯タンク101の上部より供給された高温水は風呂熱交換器114で風呂循環回路119を流れる浴槽水と熱交換され温度低下した後、中温水となって貯湯タンク101に戻される。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水の量が増大する。この中温水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回路106の運転効率(COP)の低下に関与する。すなわち、貯湯タンク101の下部に中温水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ヒートポンプ回路106の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加熱能力が低下する。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運転効率(COP)の低下度合いが顕著となる。 A bath utilization circuit 116 connected to a lower part of the hot water storage tank 101 through a circulation pump 115 is provided from the hot water outlet pipe 111 to a bath heat exchanger 114 for exchanging heat with hot water in the bathtub 113 and performing a reheating operation. On the secondary side of the bath heat exchanger 114, a bath circulation circuit 119 is connected to the bath adapter 117 of the bathtub 113 and the bath pump 118 circulates the bath water. With the above configuration, the hot water supplied from the upper part of the hot water storage tank 101 is heat-exchanged with the bath water flowing through the bath circulation circuit 119 by the bath heat exchanger 114 and the temperature is lowered, and then returned to the hot water storage tank 101 as intermediate hot water. . If this bath chasing operation continues, the amount of high-temperature water in the upper part of the hot water storage tank 101 decreases and the amount of medium-temperature water accumulated below it increases. This increase phenomenon of intermediate temperature water causes various adverse effects, and is largely related to a decrease in the operating efficiency (COP) of the heat pump circuit 106 during the boiling operation. That is, when the medium temperature water is increased in the lower part of the hot water storage tank 101, heat exchange with the refrigerant of the heat pump circuit 106 is performed 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. Heating capacity is reduced. In particular, in a heat pump cycle using carbon dioxide as a refrigerant, since the high-pressure side pressure of the heat pump is high, the degree of decrease in the operating efficiency (COP) of the heat pump becomes significant when the incoming water temperature increases.
さらに、中温水が増加することは、貯湯タンク101の上部高温水が減少することであり、全体として貯湯能力が低下することになり、湯量不足につながるものでもある。 Further, the increase in the medium-temperature water means that the high-temperature water in the upper part of the hot water storage tank 101 is reduced, and the hot water storage capacity is lowered as a whole, leading to a shortage of hot water.
そこで、本実施の形態ではこの中温水対策として、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と給水管105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、使用目的に応じた湯温を中温水を優先的に取り出すことが可能となり、貯湯タンク101内の中温水を減少させることができる。 Therefore, in the present embodiment, as a countermeasure against this warm 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 water supply pipe 105 is mixed to obtain a predetermined mixed water. A first mixing valve 120 for obtaining the temperature is provided and the valve opening degree 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 according to the purpose of use, and the hot water in the hot water storage tank 101 can be reduced.
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からの混合水と出湯管111からの高温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 high-temperature water from the outlet pipe 111 are mixed and set at a 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 temperature detector 123 is attached to the output side of the hot water mixing valve 122, and the valve opening is adjusted by feeding back the hot water temperature detected by the hot water temperature detector 123 so as to ensure a set temperature. Yes.
また、風呂利用としては、第1混合弁120からの混合水と出湯管111からの高温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, which is one of the load side mixing valves for mixing the mixed water from the first mixing valve 120 and the high temperature water from the outlet pipe 111 to obtain hot water at a set temperature, is used. It is provided and 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. By adjusting the valve opening by feeding back the hot water temperature detected by the bath temperature detector 127, the set temperature is secured. Yes.
なお、第1混合弁120の中温水側供給経路には逆止弁128を設け、中間出湯管112への逆流を防止するようにしている。また、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 a check valve 128 is provided in the intermediate temperature water supply path of the first mixing valve 120 so as to prevent backflow into the intermediate tapping pipe 112. In addition, check valves 129 and 130 are provided in the hot water supply path of the hot water supply mixing valve 122 and the bath mixing valve 125, and a check valve 131 is provided on the output side of the hot water supply mixing valve 122.
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。 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. The operation instruction 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 various operations are performed based on the control operations previously defined by the control unit 134 according to the transmitted conditions. I try to do it.
また、制御部134には電力線138から正常に電力が供給されているか否かを検出する停電検出部139と、24時間を計時するカレンダー機能付きのタイマー部140が設けられており、このタイマー部140により全量沸き上げ運転を行う夜間時間帯、すなわち深夜電力時間帯(例えば、23時〜7時)と、湯切れ沸き上げ運転を行う昼間時間帯(7時〜23時)を設定すると共に、前記停電検出部139からの信号により停電が発生した時間帯または停電が復帰した時間帯を判断し、その信号を制御部134に供給するようにしている。 In addition, the control unit 134 is provided with a power failure detection unit 139 that detects whether or not power is normally supplied from the power line 138, and a timer unit 140 with a calendar function that measures 24 hours. 140 sets the night time zone in which the whole amount heating operation is performed by 140, that is, the midnight power time zone (for example, from 23:00 to 7:00) and the daytime time zone (7 to 23:00) in which the hot water boiling operation is performed, Based on the signal from the power failure detection unit 139, the time zone when the power failure occurs or the time zone when the power failure is restored is determined, and the signal is supplied to the control unit 134.
本実施の形態における貯湯式給湯装置は、図2に示すような沸き上げ回路102により深夜電力時間帯(例えば、23時〜7時)に予め設定された沸き上げモードに従って貯湯タンク101の全量沸き上げ動作を行い、昼間時間帯(7時〜23時)に貯湯タンク101の壁面に取り付けられた残湯湯温検出器135、136、137で検出される温度に基づいて残湯量が減少し湯量不足が発生すると思われる場合は湯切れ沸き上げ動作を行い、貯湯タンク101の上部に必要な高温水湯量を確保するようにしている。以上のような沸き上げ動作によって、貯湯タンク101には上部から高温水、中温水、低温水の順で層をなして蓄積されることになる。 The hot water storage type hot water supply apparatus in the present embodiment is configured to boil the entire amount of the hot water storage tank 101 in accordance with a heating mode preset in a midnight power time zone (for example, from 23:00 to 7:00) by a boiling circuit 102 as shown in FIG. The amount of remaining hot water decreases and the amount of hot water decreases based on the temperature detected by the remaining hot water temperature detectors 135, 136, and 137 attached to the wall surface of the hot water storage tank 101 during the daytime period (7 to 23:00). When it seems that the shortage will occur, the hot water boiling operation is performed to secure the necessary amount of hot water in the upper part of the hot water storage tank 101. By the above boiling operation, the hot water storage tank 101 accumulates in layers in the order of high temperature water, medium temperature water, and low temperature water from the top.
このように蓄積された貯湯水は、給湯リモコン132または風呂リモコン133からの要求により制御部134が利用側回路の負荷側混合弁を制御して所望の湯水を利用側端末に供給するようにしている。 The stored hot water is supplied from the hot water remote controller 132 or the bath remote controller 133 so that the control unit 134 controls the load side mixing valve of the usage side circuit to supply desired hot water to the usage side terminal. Yes.
その本実施の形態における利用側回路の動作の一例を図3、図4を用いて説明すると、まず、給湯リモコン132により所望の給湯温度が設定されカラン124が開栓されると、給水管105から貯湯タンク101に給水が開始され、その給水圧により貯湯タンク101内の中温水が中間出湯管112より排出されるとともに、給水管105からの水道水が第1混合弁120の湯側a及び水側bに供給される。このとき、第1混合弁120の初期設定として湯側aを略全開状態にしておくと貯湯タンク101内の中温水が優先的に排出され、混合出口側cより次段に供給される。この湯温を第1温度検出器121で検出し、検出された湯温が給湯リモコン132で設定された温度より所定温度(例えば2℃)以下の場合は、これ以上水側に弁開度を調節することができないため、この状態で中温水の供給を継続し、次段の給湯混合弁122により出湯管111からの高温水と混合して設定温度の湯をカラン124に供給する。 An example of the operation of the user side circuit in the present embodiment will be described with reference to FIGS. 3 and 4. First, when a desired hot water supply temperature is set by the hot water supply remote controller 132 and the currant 124 is opened, the water supply pipe 105 is opened. Water supply to the hot water storage tank 101 is started, medium temperature water in the hot water storage tank 101 is discharged from the intermediate hot water discharge pipe 112 by the water supply pressure, and tap water from the water supply pipe 105 is supplied to the hot water side a of the first mixing valve 120 and Supplied to the water side b. At this time, if the hot water side a is substantially fully opened as the initial setting of the first mixing valve 120, the medium temperature water in the hot water storage tank 101 is preferentially discharged and supplied to the next stage from the mixing outlet side c. When this hot water temperature is detected by the first temperature detector 121 and the detected hot water temperature is lower than the temperature set by the hot water supply remote controller 132 by a predetermined temperature (for example, 2 ° C.), the valve opening is further increased to the water side. Since it cannot be adjusted, the supply of medium-temperature water is continued in this state, and hot water at a set temperature is supplied to the currant 124 by being mixed with hot water from the hot water discharge pipe 111 by the hot water supply mixing valve 122 in the next stage.
次に、第1温度検出器121で検出された湯温が給湯リモコン132で設定された温度より高い場合は、第1混合弁120の湯側bの開度を開き給水管105からの水道水を取り入れ中温水と混合して目標温度になるように弁開度の制御を開始する(太線で示す経路で湯水が流れる)。この制御により第1混合弁120の出口温度は徐々に目標温度に近づき、次段の給湯混合弁122の水側dに予め設定した目標温度の湯を供給する。そして、給湯混合弁122で出湯管111からの高温水と混合して設定温度の湯をカラン124に供給する。 Next, when the hot water temperature detected by the first temperature detector 121 is higher than the temperature set by the hot water supply remote controller 132, the opening of the hot water side b of the first mixing valve 120 is opened and tap water from the water supply pipe 105 is opened. Then, the valve opening is controlled so as to reach the target temperature by mixing with hot water (hot water flows through the path indicated by the thick line). By this control, the outlet temperature of the first mixing valve 120 gradually approaches the target temperature, and hot water having a preset target temperature is supplied to the water side d of the hot water supply mixing valve 122 in the next stage. Then, hot water having a set temperature is supplied to the currant 124 by being mixed with high temperature water from the hot water discharge pipe 111 by the hot water supply mixing valve 122.
以上のように、通常動作においては第1混合弁120により貯湯タンク101内に溜まった中温水を優先的に利用してカラン124等の利用側端末に湯水供給を行うため、貯湯タンク下方には低温水を確保することができるとともに、貯湯タンク上方の高温水の使用を最小限に抑えることができ、高COPの沸き上げ動作と湯切れ現象の抑制を図ることができ、ヒートポンプ式給湯装置の湯水利用形態としては極めて有効な手段を確保できるものである。 As described above, in the normal operation, the hot water is supplied to the use side terminal such as the currant 124 by preferentially using the medium temperature water accumulated in the hot water storage tank 101 by the first mixing valve 120. The low-temperature water can be secured, the use of the high-temperature water above the hot water tank can be minimized, the boiling operation of the high COP and the suppression of the hot water phenomenon can be achieved. A very effective means can be secured as a hot water utilization form.
しかしながら、上記構成における中温水の優先的な利用形態は、停電等により電力供給が停止した場合、加熱動作が停止すると共に、負荷側混合弁を水側全開の停止処理を行うようにしておくと貯湯タンク101内の湯水を利用することができず、停電期間が長時間継続すると、貯湯タンク101内の湯水温度が低下し、貯湯タンク101の下部において雑菌が繁殖しやすい温度分布になり、特に、レジオネラ菌が繁殖すると人体に危害を及ぼす場合がある。つまり、停電期間中にレジオネラ菌等の雑菌が繁殖した状態で停電復帰状態になると、雑菌が繁殖した貯湯タンク下部に近い中温出湯管112から優先的に湯水を取り出すため、繁殖した雑菌は中温出湯管112から停電復帰後の給湯利用の早い時期に流出されることになり、カラン124等を介して外部に排出される。排出された雑菌の中にレジオネラ菌が混入していると空気中に飛散し、呼吸器系より人体に悪影響を及ぼすことになる。 However, when the power supply is stopped due to a power failure or the like, the preferential usage mode of the medium-temperature water in the above configuration is that the heating operation is stopped and the load-side mixing valve is subjected to the water-side fully open stop process. If the hot water in the hot water storage tank 101 cannot be used and the power outage period continues for a long time, the hot water temperature in the hot water storage tank 101 decreases, and the temperature distribution becomes easier for germs to propagate in the lower part of the hot water storage tank 101. If Legionella is propagated, it may harm the human body. In other words, when a power failure is restored after a variety of bacteria such as Legionella bacteria have propagated during the power failure period, hot water is preferentially taken out from the intermediate hot water outlet pipe 112 near the bottom of the hot water storage tank where the bacteria have propagated. It will be discharged from the pipe 112 at an early stage of hot water use after the power failure is restored, and discharged to the outside through the currant 124 or the like. If Legionella bacteria are mixed in the discharged germs, they will be scattered in the air, which will adversely affect the human body from the respiratory system.
そこで、本実施の形態における給湯装置は、停電検出部139により停電が検出され、その後停電の復帰が検出された場合は、制御部134に信号を送って、第1混合弁120の水側bの弁開度を全開状態となるように駆動し、その後、所定の条件を満足して制御部134より制御禁止解除信号が出力されるまで、第1混合弁120の制御を禁止状態とし、水側全開状態を保持するようにしている。 Therefore, the hot water supply apparatus in the present embodiment sends a signal to the control unit 134 when the power failure is detected by the power failure detection unit 139 and then the recovery of the power failure is detected, and the water side b of the first mixing valve 120 is detected. The first mixing valve 120 is prohibited from being controlled until a predetermined condition is satisfied and a control prohibition release signal is output from the control unit 134. The side fully open state is maintained.
この制御により、停電復帰後の湯水利用形態は、給水管105から供給される水道水を第1混合弁120を介して負荷側混合弁である給湯混合弁122の水側dに供給し、貯湯タンク101の上部出湯管111から供給される湯側eの高温水と混合して設定温度の湯水をカラン124から利用することになる。 With this control, the hot water usage after the power failure is restored is such that the tap water supplied from the water supply pipe 105 is supplied to the water side d of the hot water supply mixing valve 122, which is the load side mixing valve, via the first mixing valve 120. The hot water at the set temperature is used from the currant 124 by mixing with the hot water on the hot water side e supplied from the upper hot water discharge pipe 111 of the tank 101.
この利用形態により、停電期間中に貯湯タンク101の下部にレジオネラ菌等の雑菌が繁殖したとしても、停電復帰後の給湯利用において中温出湯管112からの湯水供給は禁止されることになり、タンク上部の比較的高温状態の湯を優先的に利用するため、雑菌の流出を抑制することができる。 Even if miscellaneous bacteria such as Legionella bacteria propagate in the lower part of the hot water storage tank 101 during this blackout period, hot water supply from the intermediate temperature hot water discharge pipe 112 is prohibited in the hot water supply use after the power failure is restored. Since the upper hot water in the upper part is preferentially used, the outflow of various bacteria can be suppressed.
そして、停電復帰後において貯湯タンク101の全量沸き上げ運転が行われ、貯湯タンク101内の全量がレジオネラ菌等の雑菌が死滅する温度、例えば65℃以上になると、制御部134は第1混合弁120の制御禁止解除信号を出力し、通常の中温出湯管112からの中温水優先取り出しによる混合制御を再開させるようにしている。 When the entire amount of the hot water storage tank 101 is heated after the power failure is restored, and the total amount in the hot water storage tank 101 reaches a temperature at which miscellaneous bacteria such as Legionella bacteria are killed, for example, 65 ° C. or more, the controller 134 controls the first mixing valve. The control prohibition release signal 120 is output, and the mixing control by normal temperature hot water preferential extraction from the medium temperature hot water discharge pipe 112 is resumed.
その具体的実施形態として、停電復帰のタイミングが貯湯タンク101内の一部の湯量を沸き上げる湯切れ沸き上げ運転を行う昼間時間帯の場合は、停電が復帰した後の最初の全量沸き上げ運転を行う深夜電力時間帯が経過した後の昼間時間帯になってから、第1混合弁120の制御禁止を解除するようにしたもので、停電復帰時は第1混合弁120の制御を禁止して中温出湯管112からの湯水の供給を禁止するため、停電期間中に貯湯タンク101下部に繁殖したレジオネラ菌等の雑菌の流出を防止することができ、深夜電力時間帯を経過することで貯湯タンク101下部の湯水を含むタンク全量をレジオネラ菌が死滅する65℃以上の湯温に沸き上げることができ、この全量沸き上げ運転の時間帯を経過した後に第1混合弁120の制御を用いて湯水混合制御を行うことで、レジオネラ菌等の雑菌が存在しない状態で効果的な湯水利用形態を確保することができる。 As a specific embodiment, when the power failure recovery timing is a daytime period in which a hot water boiling operation is performed to raise a part of the hot water in the hot water storage tank 101, the first full boiling operation after the power failure is restored The control prohibition of the first mixing valve 120 is canceled after the daytime time period after the midnight power time period has elapsed, and the control of the first mixing valve 120 is prohibited when the power failure is restored. In order to prohibit the supply of hot water from the intermediate temperature hot water discharge pipe 112, it is possible to prevent the outflow of various bacteria such as Legionella bacteria that have propagated in the lower part of the hot water storage tank 101 during the power outage period, and the hot water storage can be performed after the midnight power hours. The entire tank, including the hot water at the bottom of the tank 101, can be heated to a hot water temperature of 65 ° C. or higher at which Legionella bacteria are killed. By performing the hot and cold water mixing control, it is possible to ensure effective hot water utilization form in the absence of bacteria, such as Legionella using.
また、全量沸き上げ運転を行う深夜電力時間帯に停電が復帰した場合は、復帰時の全量沸き上げ運転でタンク全量を沸き上げることが不可能な場合も想定されるため、この場合は、次回の全量沸き上げ運転を行う深夜電力時間帯が経過するまで第1混合弁120の制御を禁止状態とし、次回の深夜電力時間帯で全量沸き上げ運転が完了した後、第1混合弁120の制御を用いて湯水混合制御を行うことで、レジオネラ菌等の雑菌が存在しない状態で効果的な湯水利用形態を確保するようにしている。 In addition, if a power failure is restored during the midnight power hours during which the entire amount is heated up, it may be impossible to boil up the entire amount of the tank during the full amount boiling operation. The control of the first mixing valve 120 is prohibited until the midnight power time period during which the full amount boiling operation is performed, and after the full boiling operation is completed in the next midnight power time zone, the control of the first mixing valve 120 is performed. By using hot water and water mixing control, an effective hot water usage form is ensured in the absence of bacteria such as Legionella.
上記実施の形態における具体的な制御動作を図5,図6のフローチャートを用いて説明すると、まず、図5において、ステップ1で中温出湯管112からの中温水の優先的な利用による通常動作が行われており、ステップ2で停電検出部139により電力線138からの電力供給が正常に行われているか否かを判断し、停電等により電力供給が行われていないと判断した場合は、ステップ3で加熱動作及び混合弁制御が停止した状態で電力供給の回復を待つ。ステップ4で停電検出部139により停電が復帰し電力供給が回復したと判断したときは、制御部134に信号を送って、第1混合弁120の弁開度を水側bが全開状態となるよう駆動し、その後第1混合弁120の弁開度の制御を禁止状態とする。次に、ステップ6で貯湯タンク101の全量沸き上げ運転が完了したか否かを判断し、完了したと判断したとき、つまり、貯湯タンク101内の湯温が所定温度以上になったとき、ステップ8で第1混合弁120の制御禁止状態を解除し、通常動作に復帰させるようにしている。 The specific control operation in the above embodiment will be described with reference to the flowcharts of FIGS. 5 and 6. First, in FIG. If it is determined in step 2 that the power failure detection unit 139 normally supplies power from the power line 138, and if it is determined that power is not supplied due to a power failure or the like, step 3 In the state where the heating operation and the mixing valve control are stopped, the power supply is restored. When it is determined in step 4 that the power failure has been restored by the power failure detection unit 139 and the power supply has been restored, a signal is sent to the control unit 134 so that the water opening b of the first mixing valve 120 is fully opened. After that, the control of the valve opening degree of the first mixing valve 120 is prohibited. Next, in step 6, it is determined whether or not the entire boiling water heating operation of the hot water storage tank 101 has been completed, and when it is determined that it has been completed, that is, when the hot water temperature in the hot water storage tank 101 has become a predetermined temperature or higher, step 8, the control prohibition state of the first mixing valve 120 is canceled and the normal operation is restored.
次に、図6において更に詳細な制御動作について説明すると、ステップ11〜ステップ14までは図5と同様であり説明を省略する。ステップ14で停電復帰を判断したとき、ステップ15で停電復帰のタイミングがどの時間帯であるかを判断し、昼間時間帯に停電復帰があった場合は、ステップ16で第1混合弁120の弁開度を水側bが全開状態となるよう駆動し、その後第1混合弁120の弁開度の制御を禁止状態とする。次に、ステップ17で夜間時間帯になったか否かを判断し、夜間時間帯の場合はステップ18で全量沸き上げ運転を開始し、ステップ19で夜間時間帯が終了し昼間時間帯になったか否かを判断し、昼間時間帯であると判断したときは全量沸き上げが完了したと判断して、ステップ20で第1混合弁120の制御禁止状態を解除し、通常動作に復帰させるようにしている。 Next, a more detailed control operation in FIG. 6 will be described. Steps 11 to 14 are the same as those in FIG. When the power failure recovery is determined in step 14, it is determined in step 15 which time zone the power failure recovery timing is. If there is a power failure recovery in the daytime time period, the valve of the first mixing valve 120 is determined in step 16. The opening is driven so that the water side b is fully open, and then the control of the opening of the first mixing valve 120 is prohibited. Next, it is determined in step 17 whether or not the night time zone has been reached. In the case of the night time zone, the boiling-up operation of the entire amount is started in step 18, and the night time zone is ended and the day time zone is reached in step 19 If it is determined that it is during the daytime period, it is determined that all the boiling has been completed, and in step 20, the control prohibition state of the first mixing valve 120 is canceled and the normal operation is restored. ing.
また、ステップ15で夜間時間帯に停電復帰があったと判断したときは、ステップ21で第1混合弁120の弁開度を水側bが全開状態となるよう駆動し、その後第1混合弁120の弁開度の制御を禁止状態とする。次に、ステップ22で全量沸き上げ運転を開始し、ステップ23で全量沸き上げ運転を行う夜間時間帯が終了したかを判断し、終了したと判断した場合は全量沸き上げ運転を停止する。この場合、夜間時間帯における停電復帰のタイミングによっては全量沸き上げ条件を満足しない状態で全量沸き上げ運転が停止される場合が想定されるため、最初の昼間時間帯における第1混合弁120の制御禁止状態の解除は見送り、ステップ24で次回の夜間時間帯が判断され、ステップ25で全量沸き上げ運転が開始され、ステップ26で昼間時間帯が確認されたとき、ステップ27で第1混合弁120の制御禁止状態を解除し、通常動作に復帰させるようにしている。 When it is determined in step 15 that the power failure has been restored during the nighttime period, in step 21, the valve opening of the first mixing valve 120 is driven so that the water side b is fully opened, and then the first mixing valve 120 is driven. The control of the valve opening degree is prohibited. Next, in step 22, the full-boiling operation is started, and in step 23, it is determined whether or not the night time zone in which the full-boiling operation is performed has been completed. In this case, since it is assumed that the full-boiling operation is stopped in a state where the full-boiling condition is not satisfied depending on the timing of the power failure recovery in the night time zone, the control of the first mixing valve 120 in the first daytime zone is assumed. When the prohibition state is canceled, the next night time zone is determined in step 24, the full boiling operation is started in step 25, and the daytime zone is confirmed in step 26. In step 27, the first mixing valve 120 is started. The control prohibit state is canceled and the normal operation is restored.
以上のように、本発明貯湯式給湯装置は、ヒートポンプ式給湯装置の湯水利用形態として極めて有効な手段である中温水を優先的に使用可能な湯水混合制御方法を提供しつつ、停電等で湯水の利用が停滞したときの安全性を確保したものであり、熱源に関係なく湯水混合制御全般に適用できるものである。 As described above, the hot water storage type hot water supply apparatus of the present invention provides a hot water mixing control method capable of preferentially using medium hot water, which is an extremely effective means for using hot water in a heat pump type hot water supply apparatus, while hot water is used in a power failure or the like. This ensures safety when the use of stagnation is stagnant, and can be applied to hot and cold water mixing control in general regardless of the heat source.
101 貯湯タンク
105 給水管
106 ヒートポンプ回路
111 出湯管
112 中温出湯管
120 第1混合弁
122 給湯混合弁(負荷側混合弁)
125 風呂混合弁(負荷側混合弁)
134 制御部
139 停電検出部
140 タイマー部
DESCRIPTION OF SYMBOLS 101 Hot water storage tank 105 Water supply pipe 106 Heat pump circuit 111 Hot water discharge pipe 112 Medium temperature hot water supply pipe 120 1st mixing valve 122 Hot water supply mixing valve (load side mixing valve)
125 Bath mixing valve (load-side mixing valve)
134 Control unit 139 Power failure detection unit 140 Timer unit
Claims (4)
タンク上部の湯水を取り出す出湯管と、タンクの略中間部の湯水を取り出す中温出湯管と、タンク下部に水道水を供給する給水管と、前記給水管と前記中温出湯管からの湯水を混合する第1混合弁と、前記第1混合弁からの湯水と前記出湯管からの高温水を混合し所定温度の湯水を端末側に供給する利用側混合弁と、前記第1混合弁と利用側混合弁の弁開度制御を行う制御部とを備え、
全量沸き上げ運転を行う時間帯を設定するとともに、湯量不足を判断したとき湯切れ沸き上げ運転を行うことを設定した貯湯式給湯装置であって、
前記制御部は、停電が発生しその後復帰したとき、前記第1混合弁を、前記給水管側に全開状態となるように駆動させることを特徴とする貯湯式給湯装置。 In a hot water storage hot water supply apparatus that stores hot water heated using a heat pump circuit in a stratified state from the upper part of the tank and supplies the desired hot water to the terminal side using the hot water,
Mix the hot water from the hot water from the upper part of the tank, the intermediate hot hot water pipe from which hot water from the middle of the tank is taken out, the water supply pipe that supplies tap water to the lower part of the tank, and hot water from the water supply pipe and the intermediate temperature hot water pipe. A first mixing valve, a use side mixing valve that mixes hot water from the first mixing valve and hot water from the outlet pipe and supplies hot water at a predetermined temperature to the terminal side, and the first mixing valve and use side mixing A control unit for performing valve opening control of the valve,
A hot water storage type hot water supply apparatus that sets a time zone for performing a full-boiling operation and sets a hot-water boiling operation when it is determined that the amount of hot water is insufficient,
The controller is configured to drive the first mixing valve so that the first mixing valve is fully opened toward the water supply pipe when a power failure occurs and then returns.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005255942A JP4654845B2 (en) | 2005-09-05 | 2005-09-05 | Hot water storage water heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005255942A JP4654845B2 (en) | 2005-09-05 | 2005-09-05 | Hot water storage water heater |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007071410A JP2007071410A (en) | 2007-03-22 |
JP4654845B2 true JP4654845B2 (en) | 2011-03-23 |
Family
ID=37933017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005255942A Expired - Fee Related JP4654845B2 (en) | 2005-09-05 | 2005-09-05 | Hot water storage water heater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4654845B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5154242B2 (en) * | 2008-01-24 | 2013-02-27 | パナソニック株式会社 | Hot water storage hot water supply system |
JP2012017949A (en) * | 2010-07-09 | 2012-01-26 | Panasonic Corp | Hot water supplying device |
JP6637833B2 (en) * | 2016-04-28 | 2020-01-29 | リンナイ株式会社 | Thermal equipment |
JP6895112B2 (en) * | 2017-03-27 | 2021-06-30 | Toto株式会社 | Electric water heater |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH043823A (en) * | 1990-04-19 | 1992-01-08 | Matsushita Electric Ind Co Ltd | Flow rate switching valve |
JPH11237123A (en) * | 1998-02-23 | 1999-08-31 | Rinnai Corp | Hot-water supplier |
JP2003042547A (en) * | 2001-07-27 | 2003-02-13 | Toto Ltd | Water heater |
JP2003194407A (en) * | 2001-12-26 | 2003-07-09 | Matsushita Electric Ind Co Ltd | Hot water storage type hot water system |
JP2003240342A (en) * | 2002-02-18 | 2003-08-27 | Corona Corp | Heat pump type hot water supply system |
JP2004263912A (en) * | 2003-02-28 | 2004-09-24 | Noritz Corp | Hot water storage type hot water supply device and its hot water supply resuming time control method |
JP2004293971A (en) * | 2003-03-27 | 2004-10-21 | Corona Corp | Hot-water storage type hot-water supply device |
-
2005
- 2005-09-05 JP JP2005255942A patent/JP4654845B2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH043823A (en) * | 1990-04-19 | 1992-01-08 | Matsushita Electric Ind Co Ltd | Flow rate switching valve |
JPH11237123A (en) * | 1998-02-23 | 1999-08-31 | Rinnai Corp | Hot-water supplier |
JP2003042547A (en) * | 2001-07-27 | 2003-02-13 | Toto Ltd | Water heater |
JP2003194407A (en) * | 2001-12-26 | 2003-07-09 | Matsushita Electric Ind Co Ltd | Hot water storage type hot water system |
JP2003240342A (en) * | 2002-02-18 | 2003-08-27 | Corona Corp | Heat pump type hot water supply system |
JP2004263912A (en) * | 2003-02-28 | 2004-09-24 | Noritz Corp | Hot water storage type hot water supply device and its hot water supply resuming time control method |
JP2004293971A (en) * | 2003-03-27 | 2004-10-21 | Corona Corp | Hot-water storage type hot-water supply device |
Also Published As
Publication number | Publication date |
---|---|
JP2007071410A (en) | 2007-03-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4324154B2 (en) | Hot water storage water heater | |
JP4294624B2 (en) | Hot water storage water heater | |
JP4778299B2 (en) | Hot water storage type hot water supply device and method for changing standby opening of hot water mixing valve | |
JP4654845B2 (en) | Hot water storage water heater | |
JP4752347B2 (en) | Hot water storage water heater | |
JP4933177B2 (en) | Water heater | |
JP2010169271A (en) | Storage type water heater | |
JP4654844B2 (en) | Hot water storage water heater | |
JP2010230189A (en) | Storage-type water heater | |
JP5411732B2 (en) | Bath water heater | |
JP4654846B2 (en) | Hot water storage water heater | |
JP4654851B2 (en) | Hot water storage water heater | |
JP2007139258A (en) | Hot water storage type water heater | |
JP4635787B2 (en) | Hot water storage water heater | |
JP4715401B2 (en) | Hot water storage water heater | |
JP2007071450A (en) | Hot water storage type water heater | |
JP2007078202A (en) | Storage type water heater | |
JP2010230289A (en) | Hot water storage type water heater | |
JP2009162415A (en) | Hot water storage type water heater | |
JP2010151366A (en) | Hot water storage type water heater | |
JP2007101067A (en) | Heat pump hot water supply system | |
JP4424265B2 (en) | Hot water storage water heater | |
JP2009109094A (en) | Water heater | |
JP5164634B2 (en) | Heat pump water heater | |
JP2009047377A (en) | Water heater |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080625 |
|
RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7421 Effective date: 20091126 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20100716 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100727 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100831 |
|
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: 20101124 |
|
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: 20101207 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140107 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140107 Year of fee payment: 3 |
|
LAPS | Cancellation because of no payment of annual fees |