JP2019113278A - Storage water heater - Google Patents
Storage water heater Download PDFInfo
- Publication number
- JP2019113278A JP2019113278A JP2017248582A JP2017248582A JP2019113278A JP 2019113278 A JP2019113278 A JP 2019113278A JP 2017248582 A JP2017248582 A JP 2017248582A JP 2017248582 A JP2017248582 A JP 2017248582A JP 2019113278 A JP2019113278 A JP 2019113278A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- water storage
- outside air
- air temperature
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 273
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims abstract description 24
- 238000001704 evaporation Methods 0.000 claims abstract description 13
- 230000008020 evaporation Effects 0.000 claims abstract description 13
- 238000009833 condensation Methods 0.000 claims abstract description 6
- 230000005494 condensation Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003303 reheating Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 18
- 238000010257 thawing Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- 238000002156 mixing Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Description
本発明は、ヒートポンプ熱源機と補助熱源機を備えた貯湯給湯装置に関し、特に給湯使用の予測に基づいてヒートポンプ熱源機により加熱した湯水を貯湯タンクに貯留する貯湯運転を行う貯湯給湯装置に関する。 The present invention relates to a hot water storage apparatus equipped with a heat pump heat source machine and an auxiliary heat source machine, and more particularly to a hot water storage apparatus performing hot water storage operation in which hot water heated by the heat pump heat source machine is stored in a hot water storage tank based on prediction of hot water use.
従来から、給湯や浴槽の湯張り用の湯水を加熱して貯湯タンクに貯留するためのヒートポンプ熱源機と、給湯等の使用時に湯水を加熱する燃焼式の補助熱源機を備えた貯湯給湯装置が広く利用されている。このような貯湯給湯装置は、学習記憶した過去の給湯使用状況に基づいて将来の給湯使用を予測し、この給湯使用の予測に基づいてヒートポンプ熱源機により加熱した湯水を貯湯タンクに貯留する貯湯運転を行い、この貯留した湯水を給湯等に使用するように構成されている。補助熱源機は、貯湯タンクに貯留した湯水を給湯等に使用できない場合に、貯湯タンクの湯水を再加熱して、又は上水を加熱して給湯等を行う。 Conventionally, a hot water storage apparatus equipped with a heat pump heat source machine for heating hot water for hot water supply and hot water filling of a bath and storing it in a hot water storage tank and a combustion type auxiliary heat source machine for heating hot water when using hot water etc. It is widely used. Such a hot water storage apparatus predicts future hot water use based on the learned and stored past hot water use conditions, and stores the hot water heated by the heat pump heat source machine in the hot water storage tank based on the hot water use prediction. To store the stored hot and cold water for hot water supply and the like. When the hot water stored in the hot water storage tank can not be used for hot water supply or the like, the auxiliary heat source machine reheats the hot water of the hot water storage tank or heats the hot water to perform hot water supply and the like.
ヒートポンプ熱源機は、外気温度より低温の冷媒を蒸発熱交換器に流通させて外気から吸熱した熱により湯水を加熱するエネルギー効率の高い熱源機であるが、補助熱源機と比べて加熱能力が小さい。そのため、予測した給湯使用量に相当する熱量を貯留するために貯湯運転を長時間継続する場合がある。 A heat pump heat source machine is a heat source machine with high energy efficiency that heats hot and cold water by flowing refrigerant that is lower than the outside air temperature to the evaporative heat exchanger and absorbing heat from the outside air, but its heating capacity is smaller than that of the auxiliary heat source machine . Therefore, the hot water storage operation may be continued for a long time in order to store the amount of heat corresponding to the predicted hot-water supply usage amount.
外気温度が低いときに貯湯運転を行う場合には、外気に含まれる水分が凝縮して蒸発熱交換器に付着し凍結する着霜が発生し易くなる。蒸発熱交換器の着霜は外気からの吸熱を妨げるので、長時間の貯湯運転により着霜が多くなるとその吸熱量の低下の影響を無視できなくなる。そのため、定期的に又はある程度の着霜を検知した場合に、ヒートポンプ熱源機の駆動条件を変更して除霜運転を行うように構成されている。例えば特許文献１では、外気温度に応じて定期的に実行する除霜運転として、ヒートポンプ熱源機の暖房運転を冷房運転に切換える技術が開示されている。 When the hot water storage operation is performed when the outside air temperature is low, moisture contained in the outside air condenses and adheres to the evaporative heat exchanger, which tends to cause frost formation which is frozen. Since frost formation of the evaporative heat exchanger interferes with heat absorption from the outside air, if frost formation increases due to long-term hot water storage operation, the influence of the decrease in heat absorption amount can not be ignored. Therefore, when frost formation is detected regularly or to a certain extent, the driving condition of the heat pump heat source unit is changed to perform the defrosting operation. For example, Patent Document 1 discloses a technology of switching a heating operation of a heat pump heat source machine to a cooling operation as a defrosting operation which is periodically executed according to the outside air temperature.
貯湯運転中に除霜運転を行うと、ヒートポンプ熱源機の駆動条件を変更するため湯水を加熱することができない。また、除霜運転終了後にヒートポンプ熱源機の駆動条件を戻して貯湯運転を再開するので、ヒートポンプサイクルが安定するまでヒートポンプ熱源機の成績係数（ＣＯＰ）が低下した状態で湯水を加熱することになり好ましくない。 If the defrosting operation is performed during the hot water storage operation, the hot water can not be heated to change the drive condition of the heat pump heat source machine. In addition, since the driving condition of the heat pump heat source machine is returned after the defrosting operation is finished and the hot water storage operation is resumed, the hot water is heated in a state where the coefficient of performance (COP) of the heat pump heat source machine is decreased until the heat pump cycle becomes stable. Not desirable.
本発明の目的は、低温下で長時間の貯湯運転を安定的に実行可能な貯湯給湯装置を提供することである。 An object of the present invention is to provide a hot water storage apparatus capable of stably executing long-time hot water storage operation under low temperature.
請求項１の発明は、圧縮機と凝縮熱交換器と膨張手段と蒸発熱交換器とを冷媒回路で接続して構成され、前記凝縮熱交換器と前記膨張手段をバイパスするバイパス通路及び前記バイパス通路を開閉するための開閉弁を備えたヒートポンプ熱源機と、前記ヒートポンプ熱源機により加熱された湯水を貯留する貯湯タンクと、前記貯湯タンクの湯水を再加熱して給湯可能な補助熱源機と、外気温度を検知する外気温度検知手段と、学習記憶した給湯使用状況に基づいて将来の給湯使用を予測すると共に予測した給湯使用量に相当する熱量を給湯使用までに前記貯湯タンクに貯留する貯湯運転を制御する制御手段を備えた貯湯給湯装置において、前記制御手段は、外気温度と予測した給湯使用量に基づいて前記貯湯運転中に前記蒸発熱交換器の着霜の影響があると判定した場合には、前記貯湯運転中に前記外気温度に対応づけて予め設定された開閉パターンで前記開閉弁を開閉させることを特徴としている。 The invention of claim 1 is constituted by connecting a compressor, a condensing heat exchanger, an expansion means, and an evaporation heat exchanger by a refrigerant circuit, and bypassing the condensation heat exchanger and the expansion means, and the bypass A heat pump heat source machine having an on-off valve for opening and closing a passage, a hot water storage tank for storing hot water heated by the heat pump heat source machine, and an auxiliary heat source machine capable of hot-watering the hot water of the hot water storage tank; A hot water storage operation which predicts future hot water supply usage based on the outside air temperature detection means for detecting the outside air temperature and the learned and stored hot water supply usage condition and stores the heat quantity corresponding to the predicted hot water supply usage in the hot water storage tank before hot water supply use In the hot water storage apparatus provided with control means for controlling the temperature control, the control means is configured to form the frost on the evaporation heat exchanger during the hot water storage operation based on the outside air temperature and the predicted hot water supply usage amount. If the impact is determined that there is characterized in that opening and closing the on-off valve in the open pattern set in advance in correspondence with the outside air temperature in the hot water storage operation.
上記構成によれば、給湯使用の予測に基づいて貯湯運転を行うとき、外気温度が低いため貯湯運転を長く続けると蒸発熱交換器の着霜の影響があると判定した場合に、外気温度に対応する開閉パターンで開閉弁を短時間開放した後閉止させるので、周期的に高温の冷媒がバイパス通路を通って蒸発熱交換器に流入する。従って、開閉パターンに基づいて蒸発熱交換器の着霜を除去、予防できるので、外気温度が低いときでも長時間の貯湯運転を安定的に実行可能である。また、貯湯運転中のヒートポンプ熱源機のヒートポンプサイクルを崩さないように開閉弁を開閉させるので、安定的に貯湯運転を実行できる。 According to the above configuration, when the storage operation is performed based on the prediction of the use of hot water, if it is determined that the influence of the frost formation of the evaporative heat exchanger when the storage operation is continued for a long time because the outside air temperature is low, Since the on-off valve is opened and closed for a short time according to the corresponding on-off pattern, the high temperature refrigerant periodically flows into the evaporative heat exchanger through the bypass passage. Therefore, since frost formation of the evaporative heat exchanger can be removed and prevented based on the open / close pattern, long-term hot water storage operation can be stably performed even when the outside air temperature is low. Moreover, since the on-off valve is opened and closed so as not to break the heat pump cycle of the heat pump heat source machine during the hot water storage operation, the hot water storage operation can be stably performed.
請求項２の発明は、請求項１において、前記開閉パターンは、外気温度が低い程前記開閉弁の開弁周期が短く設定されたことを特徴としている。 A second aspect of the present invention is characterized in that in the first aspect, the opening cycle of the on-off valve is set to be shorter as the outside air temperature is lower.
上記構成によれば、外気温度が低い程開閉パターンにおける開閉弁の開弁周期が短く設定されているので、外気温度が低い程着霜し易い蒸発熱交換器に、外気温度が低い程短い周期で高温の冷媒を流入させて着霜を除去、予防できる。 According to the above configuration, the opening period of the on-off valve in the opening and closing pattern is set shorter as the outside air temperature is lower. Therefore, the shorter the outside air temperature is, the shorter the cycle is as the outside air temperature is lower. The high temperature refrigerant can be introduced to remove and prevent frost formation.
請求項３の発明は、請求項１又は２において、前記開閉パターンは、外気温度が低い程前記開閉弁の開弁時間が長く設定されたことを特徴としている。 The invention according to claim 3 is characterized in that in the invention according to claim 1 or 2, the opening time of the on-off valve is set longer as the outside air temperature is lower.
上記構成によれば、外気温度が低い程開閉パターンにおける開閉弁の開弁時間が長く設定されているので、外気温度が低い程着霜し易い蒸発熱交換器に、外気温度が低い程長く高温の冷媒を流入させて着霜を除去、予防できる。 According to the above configuration, since the opening time of the on-off valve in the opening and closing pattern is set longer as the outside air temperature is lower, the evaporation heat exchanger is more likely to frost as the outside air temperature is lower. The inflow of refrigerant can be prevented and frost formation can be prevented.
本発明の貯湯給湯装置によれば、低温下で長時間の貯湯運転を安定的に実行可能である。 According to the hot water storage hot water supply apparatus of the present invention, a long time hot water storage operation can be stably performed under low temperature.
以下、本発明を実施するための形態について実施例に基づいて説明する。 Hereinafter, the form for carrying out the present invention is explained based on an example.
最初に、本発明の貯湯給湯装置１の全体構成について、図１に基づいて説明する。
貯湯給湯装置１は、ヒートポンプ熱源機２と、貯湯給湯ユニット３を備えている。貯湯給湯ユニット３は、燃焼式の補助熱源機４と、ヒートポンプ熱源機２により加熱された湯水を貯留する貯湯タンク５と、給湯使用状況に基づいて給湯使用予測を行うと共に予測した給湯使用量に相当する熱量（必要熱量）を給湯使用までに貯湯タンク５に貯留するように貯湯運転を制御する制御部７（制御手段）等を備えている。
First, the entire configuration of the hot water storage hot water supply device 1 of the present invention will be described based on FIG.
The hot water storage hot water supply device 1 includes a heat pump heat source unit 2 and a hot water storage hot water supply unit 3. The hot water storage unit 3 performs hot water supply usage prediction based on the hot water supply usage status based on the combustion type auxiliary heat source unit 4, the hot water storage tank 5 storing hot water heated by the heat pump heat source unit 2, A control unit 7 (control means) or the like that controls the hot water storage operation so as to store the corresponding heat amount (necessary heat amount) in the hot water storage tank 5 until the hot water supply use is provided.
ヒートポンプ熱源機２は、貯湯運転時には外気から吸熱した熱により湯水を加熱して貯湯タンク５に貯留する。貯湯運転により貯湯タンク５に貯留された湯水が給湯や浴槽１９の湯張りに使用される。貯湯タンク５の湯水を給湯設定温度で給湯できない場合には、補助熱源機４において燃料を燃焼させて貯湯タンク５の湯水を再加熱して、又は上水を加熱して給湯する。 The heat pump heat source machine 2 heats hot and cold water by the heat absorbed from the outside air during the hot water storage operation, and stores the hot and cold water in the hot water storage tank 5. Hot and cold water stored in the hot water storage tank 5 by the hot water storage operation is used for hot water supply and hot water filling of the bath 19. When the hot water of the hot water storage tank 5 can not be supplied with the hot water supply setting temperature, the auxiliary heat source unit 4 burns the fuel to reheat the hot water of the hot water storage tank 5 or heats the hot water to supply hot water.
貯湯タンク５の上部には、貯湯タンク５に貯留した湯水を出湯するための出湯通路１１が接続されている。出湯通路１１には、出湯通路１１を流通して湯水混合弁１２に供給される湯水の出湯温度を検知するための出湯温度センサ１１ａが配設されている。また、貯湯タンク５の下部には、貯湯タンク５に上水源から上水を供給するための給水通路１３が接続されている。給水通路１３には給水温度を検知するための給水温度センサ１３ａが配設されている。 At the upper portion of the hot water storage tank 5, a hot water discharge passage 11 for tapping hot water stored in the hot water storage tank 5 is connected. In the hot water discharge passage 11, a hot water discharge temperature sensor 11a for detecting the temperature of the hot water of hot water supplied from the hot water passage 11 through the hot water passage 11 is disposed. In addition, a water supply passage 13 for supplying clean water to the hot water storage tank 5 from a water supply source is connected to the lower portion of the hot water storage tank 5. A water supply temperature sensor 13 a for detecting a water supply temperature is disposed in the water supply passage 13.
給水バイパス通路１４は、給水通路１３から分岐して湯水混合弁１２に接続されている。湯水混合弁１２は、給湯設定温度の給湯のために出湯通路１１の湯水と給水バイパス通路１４の上水との混合比率を調整して混合する。湯水混合弁１２には給湯通路１６が接続され、湯水混合弁１２で混合されて給湯設定温度に調整された湯水は、給湯通路１６を流通して図示外の給湯栓等に給湯可能である。 The water supply bypass passage 14 branches from the water supply passage 13 and is connected to the hot and cold water mixing valve 12. The hot and cold water mixing valve 12 adjusts and mixes the mixing ratio of hot water and hot water in the hot water passage 11 to the hot water in the water supply bypass passage 14 for hot water supply of the hot water supply set temperature. A hot water supply passage 16 is connected to the hot and cold water mixing valve 12, and the hot and cold water mixed by the hot and cold water mixing valve 12 and adjusted to the hot water supply setting temperature can be circulated through the hot water supply passage 16 and hot water can be supplied to a hot water tap or the like not shown.
また、湯水混合弁１２で混合された湯水は、給湯通路１６から分岐して追焚回路１７に接続する湯張り通路１８を介して浴槽１９に湯張り可能である。給湯通路１６には、給湯温度を検知するための給湯温度センサ１６ａと給湯流量を検知する給湯流量センサ１６ｂが配設され、湯張り通路１８は湯張りのときに開弁する開閉弁１８ａを備えている。 Further, the hot and cold water mixed by the hot and cold water mixing valve 12 can be filled in the bath 19 through the hot water passage 18 which branches from the hot water supply passage 16 and is connected to the supplementary circuit 17. A hot water supply temperature sensor 16a for detecting a hot water supply temperature and a hot water supply flow rate sensor 16b for detecting a hot water supply flow rate are disposed in the hot water supply passage 16, and the hot water passage 18 is provided with an on-off valve 18a which opens when the water is filled. ing.
貯湯タンク５の下部にはヒートポンプ熱源機２に湯水を供給する上流加熱通路２１ａが接続され、ヒートポンプ熱源機２で加熱された湯水を貯湯タンク５に供給する下流加熱通路２１ｂが貯湯タンク５の上部に接続されて、貯湯タンク５とヒートポンプ熱源機２の間で循環ポンプ２２により湯水が循環可能な循環加熱回路２１が形成されている。貯湯運転では、下流加熱通路２１ｂに配設された温度センサ２１ｃの検知温度が、制御部７が設定した目標貯湯温度となるようにヒートポンプ熱源機２及び循環ポンプ２２が制御される。 An upstream heating passage 21a for supplying hot water to the heat pump heat source machine 2 is connected to a lower portion of the hot water storage tank 5, and a downstream heating passage 21b for supplying hot water heated by the heat pump heat source machine 2 to the hot water storage tank 5 is an upper portion of the hot water tank 5. A circulation heating circuit 21 is formed between the hot water storage tank 5 and the heat pump heat source machine 2 so that hot and cold water can be circulated by the circulation pump 22. In the hot water storage operation, the heat pump heat source machine 2 and the circulation pump 22 are controlled such that the detected temperature of the temperature sensor 21c disposed in the downstream heating passage 21b becomes the target hot water storage temperature set by the control unit 7.
貯湯タンク５の外周には、貯留された湯水の温度を検知する複数の貯湯温度センサ５ａ〜５ｅが上下方向に所定の間隔を空けて配設されている。貯湯温度センサ５ａ〜５ｅ及び貯湯タンク５は、貯留された湯水の放熱を低減する図示外の保温材により覆われている。 On the outer periphery of the hot water storage tank 5, a plurality of hot water storage temperature sensors 5a to 5e for detecting the temperature of the stored hot water are arranged at predetermined intervals in the vertical direction. The hot water storage temperature sensors 5a to 5e and the hot water storage tank 5 are covered with a heat insulating material (not shown) that reduces the heat radiation of the stored hot water.
貯湯タンク５の湯水を補助熱源機４で加熱するための補助加熱通路２３が、出湯通路１１から分岐されて補助熱源機４に接続されている。補助熱源機４で加熱した湯水を出湯するための補助出湯通路２４は、補助加熱通路２３の分岐部より下流側の出湯通路１１に接続されている。補助出湯通路２４に配設された調整弁２５は、補助出湯通路２４から出湯通路１１に供給される湯水量を調整する。補助加熱通路２３には、三方弁２６と補助熱源機４に湯水を送るためのポンプ２７が配設されている。 An auxiliary heating passage 23 for heating the hot and cold water of the hot water storage tank 5 with the auxiliary heat source unit 4 is branched from the hot water passage 11 and connected to the auxiliary heat source unit 4. An auxiliary hot water discharge passage 24 for discharging hot water heated by the auxiliary heat source unit 4 is connected to the hot water discharge passage 11 on the downstream side of the branch portion of the auxiliary heating passage 23. The adjustment valve 25 disposed in the auxiliary outlet passage 24 adjusts the amount of hot and cold water supplied from the auxiliary outlet passage 24 to the outlet passage 11. The auxiliary heating passage 23 is provided with a three-way valve 26 and a pump 27 for sending hot and cold water to the auxiliary heat source unit 4.
補助出湯通路２４から分岐した熱交換器通路２８は、三方弁２６に接続されている。三方弁２６は、補助熱源機４に貯湯タンク５の湯水又は熱交換器通路２８の湯水を供給可能となるように切換えられる。熱交換器通路２８には熱交換器２８ａと開閉弁２８ｂが配設されている。この熱交換器２８ａは、追焚ポンプ２９の作動により追焚回路１７を流れる浴槽１９の湯水を補助熱源機４で加熱した湯水との熱交換により加熱する追焚運転に使用される。また、熱交換器通路２８には、給水通路１３から分岐した分岐通路部１３ｂが熱交換器通路２８に上水を供給可能なように接続されている。 The heat exchanger passage 28 branched from the auxiliary hot water passage 24 is connected to the three-way valve 26. The three-way valve 26 is switched so that the hot water of the hot water storage tank 5 or the hot water of the heat exchanger passage 28 can be supplied to the auxiliary heat source unit 4. A heat exchanger 28 a and an on-off valve 28 b are disposed in the heat exchanger passage 28. The heat exchanger 28a is used for a follow-up operation of heating the hot and cold water in the bath 19 flowing through the supplementary circuit 17 by the operation of the follow-up pump 29 by heat exchange with the hot and cold water heated by the auxiliary heat source 4. Further, a branch passage portion 13 b branched from the water supply passage 13 is connected to the heat exchanger passage 28 so as to be able to supply clean water to the heat exchanger passage 28.
ヒートポンプ熱源機２は、圧縮機３２、凝縮熱交換器３３、膨張弁３４（膨張手段）、蒸発熱交換器３５を冷媒回路３６により接続して構成されている。このヒートポンプ熱源機２は、冷媒回路３６に封入された冷媒を圧縮機３２で圧縮して高温にし、循環ポンプ２２により循環加熱回路２１を流通する湯水を凝縮熱交換器３３において高温の冷媒との熱交換により加熱する。熱交換後の冷媒は、膨張弁３４により膨張して外気より低温になり、蒸発熱交換器３５で外気から吸熱した後、再び圧縮機３２に導入される。 The heat pump heat source unit 2 is configured by connecting a compressor 32, a condensation heat exchanger 33, an expansion valve 34 (expansion means), and an evaporation heat exchanger 35 by a refrigerant circuit 36. In the heat pump heat source machine 2, the refrigerant sealed in the refrigerant circuit 36 is compressed by the compressor 32 to a high temperature, and the hot water flowing through the circulation heating circuit 21 is circulated by the circulation pump 22 with the high temperature refrigerant in the condensation heat exchanger 33. Heat by heat exchange. The refrigerant after heat exchange is expanded by the expansion valve 34 to become lower temperature than the outside air, and after absorbing heat from the outside air by the evaporative heat exchanger 35, it is introduced into the compressor 32 again.
蒸発熱交換器３５は外気温度Ｔｏを検知する外気温度センサ３５ａ（外気温度検知手段）と送風機３５ｂを備えている。冷媒回路３６には、凝縮熱交換器３３と膨張弁３４をバイパスするバイパス通路３８が配設され、このバイパス通路３８にバイパス通路３８を開閉するための開閉弁である除霜弁３９が配設されている。また、ヒートポンプ熱源機２は、圧縮機３２、膨張弁３４、送風機３５ｂ、除霜弁３９等を制御するヒートポンプ制御部３７を備えている。ヒートポンプ制御部３７は、貯湯給湯装置１の主たる制御手段である制御部７に通信可能に接続され、制御部７の指令に従ってヒートポンプ熱源機２を制御する。尚、ヒートポンプ熱源機２は、起動後や駆動条件変更後にヒートポンプサイクルが安定するまで、通常１０分程度の時間を要する。 The evaporation heat exchanger 35 is provided with an outside air temperature sensor 35a (outside air temperature detection means) for detecting the outside air temperature To and a blower 35b. The refrigerant circuit 36 is provided with a bypass passage 38 for bypassing the condensing heat exchanger 33 and the expansion valve 34, and the bypass passage 38 is provided with a defrost valve 39 serving as an on-off valve for opening and closing the bypass passage 38. It is done. The heat pump heat source unit 2 further includes a heat pump control unit 37 that controls the compressor 32, the expansion valve 34, the blower 35b, the defrosting valve 39, and the like. The heat pump control unit 37 is communicably connected to the control unit 7 which is the main control means of the hot water storage hot water supply device 1, and controls the heat pump heat source machine 2 according to the command of the control unit 7. The heat pump heat source unit 2 normally takes about 10 minutes to stabilize the heat pump cycle after activation or after changing the driving conditions.
次に、除霜運転について説明する。
蒸発熱交換器３５に着霜すると外気からの吸熱が妨げられる。これを例えば冷媒回路３６の圧縮機３２と凝縮熱交換器３３の間に配設された冷媒温度センサ４０によって圧縮機３２で圧縮された冷媒の温度低下に基づいて検知して、除霜運転を実行する。除霜運転では、循環ポンプ２２と送風機３５ｂを停止させ、膨張弁３４を閉弁し、除霜弁３９を開弁し、圧縮機３２の回転数を増加させて高温の冷媒を蒸発熱交換器３５に流通させる。そのため、貯湯運転と除霜運転を同時に実行できず、除霜運転後の貯湯運転のヒートポンプサイクルはしばらく安定しない。
Next, the defrosting operation will be described.
When frost is formed on the evaporative heat exchanger 35, heat absorption from the outside air is hindered. This is detected based on, for example, the temperature drop of the refrigerant compressed by the compressor 32 by the refrigerant temperature sensor 40 disposed between the compressor 32 and the condensing heat exchanger 33 of the refrigerant circuit 36, and the defrosting operation is performed. Run. In the defrosting operation, the circulation pump 22 and the blower 35b are stopped, the expansion valve 34 is closed, the defrosting valve 39 is opened, the rotational speed of the compressor 32 is increased, and the high temperature refrigerant is evaporated heat exchanger Distribute to 35. Therefore, the hot water storage operation and the defrosting operation can not be simultaneously performed, and the heat pump cycle of the hot water storage operation after the defrosting operation is not stable for a while.
貯湯給湯装置１はこの除霜運転を実行可能であるが、長時間の貯湯運転を安定的に実行するために除霜運転を回避可能なように構成されている。以下ではその構成について説明する。 The hot water storage apparatus 1 can execute this defrosting operation, but is configured to be able to avoid the defrosting operation in order to stably execute a long-time hot water storage operation. The configuration will be described below.
制御部７は、各種センサの検知信号等に基づいて給湯等の制御を行うと共に、給湯使用量や給湯使用時刻、その時の各種温度等の給湯使用状況を学習記憶している。そして、この給湯使用状況に基づいて周期的（例えば５分毎）に将来の給湯使用予測を行い、この給湯使用予測に基づいて予測した給湯使用時刻までに必要熱量の貯留が完了するように貯湯運転を制御する。また、外気温度Ｔｏと予測した給湯使用量に基づいて貯湯運転中に蒸発熱交換器３５の着霜の影響があると判定した場合に着霜除去予防制御を行う。この制御を図２のフローチャートに基づいて説明する。図中のＳｉ（ｉ＝１，２，・・・）はステップを表す。 The control unit 7 controls the hot water supply and the like based on detection signals of various sensors and the like, and learns and stores the hot water use conditions such as the hot water use amount, the hot water use time, and various temperatures at that time. And future hot water supply use prediction is performed periodically (for example, every 5 minutes) based on this hot water supply use condition, and storage of required heat is completed by the hot water use use time predicted based on this hot water supply use prediction. Control the operation. In addition, when it is determined that the influence of the frost formation of the evaporative heat exchanger 35 is determined during the hot water storage operation based on the hot water supply usage amount predicted as the outside air temperature To, the frost formation removal prevention control is performed. This control will be described based on the flowchart of FIG. Si (i = 1, 2,...) In the figure represents a step.
最初にＳ１において、外気温度センサ３５ａにより外気温度Ｔｏを検知してＳ２に進む。次にＳ２において、外気温度Ｔｏがヒートポンプ熱源機２による貯湯運転実行可能な下限外気温度（例えば−７℃）以上か否か判定し、判定がＹｅｓの場合はＳ３に進み、判定がＮｏの場合はＳ１に戻る。尚、外気温度Ｔｏが下限外気温度未満では、ヒートポンプ熱源機２で効率的な加熱ができないため、補助熱源機４により給湯等を行う。 First, at S1, the outside air temperature sensor 35a detects the outside air temperature To, and the process proceeds to S2. Next, in S2, it is determined whether the outside air temperature To is equal to or higher than the lower limit outside air temperature (for example, -7 ° C) at which the heat pump heat source machine 2 can carry out the hot water storage operation execution. Returns to S1. Note that if the outside air temperature To is less than the lower limit outside air temperature, efficient heating can not be performed by the heat pump heat source machine 2, so the auxiliary heat source machine 4 performs hot water supply and the like.
次にＳ３において、学習記憶した給湯使用状況に基づいて将来の給湯使用予測を行ってＳ４に進む。次にＳ４において、給湯使用予測に基づいて貯留する必要熱量、必要熱量を貯留する目標貯湯温度、必要熱量を給湯使用時刻までに貯留するための貯湯運転開始時刻等を含む貯湯運転条件を設定してＳ５に進む。 Next, in S3, future hot-water supply usage prediction is performed based on the learned and stored hot-water use status, and the process proceeds to S4. Next, in S4, set the hot water storage operating conditions including the required heat amount to be stored based on hot water supply usage prediction, the target storage water temperature to store the required heat amount, and the hot water storage operation start time for storing the required heat amount by the hot water supply use time. Go to S5.
次にＳ５において、外気温度Ｔｏと予測した給湯使用量に基づいて給湯運転時に蒸発熱交換器３５の着霜の影響があるか否か判定し、着霜の影響があると判定した場合（判定がＹｅｓの場合）はＳ６に進む。このとき、外気温度Ｔｏが低い程着霜の可能性が高くなり、予測した給湯使用量から見積もられる貯湯運転時間が長い程着霜が貯湯運転に影響する。そのため、例えば外気温度Ｔｏが５℃未満で貯湯運転時間１５分以上と見積もられた場合に、着霜の影響があると判定する。 Next, in S5, it is determined whether there is an influence of frost formation of the evaporation heat exchanger 35 at the time of hot water supply operation based on the hot-water supply usage amount predicted as the outside air temperature To, and it is determined that there is an influence of frost formation (In the case of “Yes”) proceeds to S 6 At this time, the lower the outside air temperature To is, the higher the possibility of frost formation, and the frost formation affects the hot water storage operation as the hot water storage operation time estimated from the predicted amount of use of hot water increases. Therefore, for example, when it is estimated that the outside air temperature To is less than 5 ° C. and the hot water storage operation time is 15 minutes or more, it is determined that there is an influence of frost formation.
次にＳ６において、予め実験等によって外気温度Ｔｏに対応づけて設定された除霜弁３９の開閉パターンを選択してＳ７に進む。この開閉パターンは、図３に示すように開弁時間を一定に（例えば１５秒に）設定し、外気温度Ｔｏが低い程開弁周期が短くなるように外気温度区分毎に開弁周期を設定している。また、開閉パターンは、図４に示すように開弁周期を一定に（例えば６０分に）設定し、外気温度Ｔｏが低い程開弁時間が長くなるように外気温度区分毎に開弁時間を設定することもでき、図示を省略するが外気温度Ｔｏが低い程開弁周期が短く且つ開弁時間が長くなるように設定することも可能である。 Next, in S6, the opening / closing pattern of the defrosting valve 39 previously set in association with the outside air temperature To by an experiment or the like is selected, and the process proceeds to S7. In this opening and closing pattern, as shown in FIG. 3, the valve opening time is set constant (for example, 15 seconds), and the valve opening cycle is set for each outside air temperature division so that the open valve cycle becomes shorter as the outside air temperature To becomes lower. doing. Also, as shown in FIG. 4, the opening / closing pattern is set to have a constant opening cycle (for example, 60 minutes), and the opening time is longer for each outside air temperature division so that the lower the outside air temperature To is, the longer the valve opening time becomes. Although it can be set, although it is not shown, it is also possible to set so that the valve opening cycle becomes shorter and the valve opening time becomes longer as the outside air temperature To becomes lower.
次に図２のＳ７において、設定した貯湯運転開始時刻になったか否か判定し、判定がＹｅｓの場合はＳ８に進み、判定がＮｏの場合はＳ１に戻る。 Next, in S7 of FIG. 2, it is determined whether or not the set hot water storage operation start time has come, and if the determination is Yes, the process proceeds to S8, and if the determination is No, the process returns to S1.
次にＳ８において、貯湯運転条件に基づく貯湯運転を実行してＳ９に進む。そしてＳ９において、選択した開閉パターンに開弁周期として設定された除霜弁３９の開弁タイミングになったか否か判定する。Ｓ９の判定がＹｅｓの場合は、Ｓ１０に進んでヒートポンプ熱源機２の駆動条件を維持したまま選択した開閉パターンに設定された開弁時間だけ除霜弁３９の開弁を実行してＳ１１に進み、Ｓ９の判定がＮｏの場合はＳ１１に進む。 Next, in S8, the hot water storage operation based on the hot water storage operation condition is executed, and the process proceeds to S9. Then, in S9, it is determined whether or not the valve opening timing of the defrost valve 39, which is set as the valve opening cycle in the selected opening and closing pattern, has come. If the determination in S9 is Yes, the process proceeds to S10 and the defrost valve 39 is opened for the valve opening time set in the selected opening / closing pattern while maintaining the drive condition of the heat pump heat source machine 2, and the process proceeds to S11 If the determination in S9 is No, the process proceeds to S11.
次にＳ１１において、必要熱量の貯湯が完了したか否か判定する。判定がＮｏの場合はＳ８に戻って貯湯運転の実行を継続し、判定がＹｅｓの場合にはＳ１５に進んで循環ポンプ２２とヒートポンプ熱源機２を停止させて貯湯運転を終了してリターンする。このとき、次回の貯湯運転のために、選択した開閉パターンに設定された開弁時間だけ除霜弁３９を開弁させると共にヒートポンプ熱源機２の駆動を維持した後、除霜弁３９の閉弁とヒートポンプ熱源機２の停止を行うことも可能である。 Next, in S11, it is determined whether or not storage of the required heat amount has been completed. If the determination is No, the process returns to S8 to continue execution of the hot water storage operation, and if the determination is Yes, the process proceeds to S15 to stop the circulation pump 22 and the heat pump heat source machine 2 to end the hot water storage operation and return. At this time, for the next hot water storage operation, the defrost valve 39 is opened for only the valve opening time set to the selected open / close pattern and the drive of the heat pump heat source machine 2 is maintained. It is also possible to stop the heat pump heat source unit 2.
一方、Ｓ５の判定がＮｏの場合、即ち外気温度Ｔｏが例えば５℃以上又は貯湯時間が例えば１５分未満のため、着霜の影響があると判定しなかった場合はＳ１２に進む。そしてＳ１２において、設定した貯湯運転開始時刻になったか否か判定し、判定がＹｅｓの場合はＳ１３に進み、判定がＮｏの場合はＳ１に戻る。 On the other hand, if the determination in S5 is No, that is, if the outside air temperature To is not determined to be affected by frost formation because the outside air temperature To is, for example, 5 ° C. or more or the hot water storage time is less than 15 minutes, the process proceeds to S12. Then, in S12, it is determined whether or not the set hot water storage operation start time has come. If the determination is Yes, the process proceeds to S13, and if the determination is No, the process returns to S1.
次にＳ１３において、貯湯運転条件に基づく貯湯運転を実行してＳ１４に進む。そしてＳ１４において、必要熱量の貯湯が完了したか否か判定し、判定がＮｏの場合はＳ１３に戻って貯湯運転の実行を継続し、判定がＹｅｓの場合にはＳ１５に進んで貯湯運転を終了してリターンする。 Next, in S13, the hot water storage operation based on the hot water storage operation condition is executed, and the process proceeds to S14. Then, in S14, it is determined whether or not storage of the required heat amount is completed, and if the determination is No, the process returns to S13 and continues execution of the hot water storage operation. If the determination is Yes, the process proceeds to S15 and the hot water storage operation is ended. And return.
ここで、例えば外気温度Ｔｏが−３℃、貯湯運転時間が７０分と見積もられた場合の着霜除去予防制御の１例を図５に示す。このとき例えば図３の開閉パターンＡ２が選択される。時刻ｔ０で貯湯運転が開始されると外気温度Ｔｏより低温の冷媒が蒸発熱交換器３５に流入して蒸発熱交換器温度が低下し、外気から吸熱するようになる。 Here, for example, one example of the frost formation removal prevention control when the outside air temperature To is estimated to be -3 ° C and the hot water storage operation time is 70 minutes is shown in FIG. At this time, for example, the open / close pattern A2 of FIG. 3 is selected. When the hot water storage operation is started at time t0, the refrigerant having a temperature lower than the outside air temperature To flows into the evaporative heat exchanger 35, the evaporative heat exchanger temperature is lowered, and heat is absorbed from the outside air.
除霜弁３９の開弁のタイミングとなる時刻ｔ１で除霜弁３９を開弁すると、高温の冷媒がバイパス通路３８を通って蒸発熱交換器３５に流入するため蒸発熱交換器温度が上昇し、着霜を除去、予防する。この冷媒の温度は湯水の加熱のために例えば６０℃以上になっているので、着霜の除去、予防に十分作用する。時刻ｔ１から１５秒後の時刻ｔ２で除霜弁３９を閉弁すると、再び外気温度Ｔｏより低温の冷媒が蒸発熱交換器３５に流入して蒸発熱交換器温度が低下する。貯湯運転中にこの開閉パターンＡ２で除霜弁３９を短時間開放した後閉止する動作を貯湯運転終了時刻ｔｅまで繰り返すことにより着霜を除去、予防して安定的に長時間の貯湯運転を実行している。 When the defrosting valve 39 is opened at time t1 when the defrosting valve 39 opens, the high temperature refrigerant flows into the evaporation heat exchanger 35 through the bypass passage 38 and the evaporation heat exchanger temperature rises. Remove frost and prevent. Since the temperature of this refrigerant is, for example, 60 ° C. or higher for heating of hot and cold water, it sufficiently acts to remove and prevent frost formation. When the defrosting valve 39 is closed at time t2 after 15 seconds from time t1, the refrigerant having a temperature lower than the outside air temperature To flows into the evaporation heat exchanger 35 again, and the evaporation heat exchanger temperature decreases. During the hot water storage operation, the defrost valve 39 is opened for a short time with this open / close pattern A2 and repeated operation until the hot water storage operation end time te by repeating the operation of closing until the hot water storage operation end time te doing.
次に、本発明の貯湯給湯装置１の作用、効果について説明する。
制御部７は給湯使用予測に基づく貯湯運転を行う際に、外気温度Ｔｏと予測した給湯使用量に基づいて貯湯運転中に蒸発熱交換器３５の着霜の影響があると判定した場合には、貯湯運転中に外気温度Ｔｏに対応づけて予め設定された開閉パターンで除霜弁３９を短時間開放した後閉止する。従って、周期的に蒸発熱交換器３５に高温の冷媒を流通させて着霜を除去、予防することができ、外気温度Ｔｏが低いときでも長時間の貯湯運転を安定的に実行可能である。その上、貯湯運転中のヒートポンプ熱源機２のヒートポンプサイクルを崩さないように除霜弁３９を開閉させるので、安定的に貯湯運転を実行できる。
Next, the operation and effects of the hot water storage hot water supply device 1 of the present invention will be described.
When the storage unit operation based on the hot water supply usage prediction is performed, the control unit 7 determines that there is an influence of the frost formation of the evaporative heat exchanger 35 during the hot water storage operation based on the hot water usage amount predicted with the outside air temperature To. During the hot water storage operation, the defrost valve 39 is opened for a short time according to the open / close pattern set in advance in association with the outside air temperature To, and then closed. Therefore, a high temperature refrigerant can be circulated periodically through the evaporative heat exchanger 35 to remove and prevent frost formation, and even when the outside air temperature To is low, it is possible to stably execute a long-time hot water storage operation. Moreover, since the defrost valve 39 is opened and closed so as not to break the heat pump cycle of the heat pump heat source machine 2 during the hot water storage operation, the hot water storage operation can be stably performed.
また、除霜弁３９の開閉パターンは、外気温度Ｔｏが低い程開弁周期が短く、又は外気温度Ｔｏが低い程開弁時間が長く、又は外気温度Ｔｏが低い程開弁周期が短く且つ開弁時間が長く設定されている。従って、外気温度Ｔｏが低い程着霜し易い蒸発熱交換器３５に、外気温度Ｔｏが低い程着霜の除去、予防作用を高めるように高温の冷媒を流入させて着霜を除去、予防できる。 In addition, the opening / closing pattern of the defrosting valve 39 has a shorter opening cycle as the outside air temperature To is lower, or a longer opening time as the outside air temperature To is lower, or a shorter opening cycle as the outside air temperature To is lower. The valve time is set long. Therefore, a refrigerant having a high temperature can be introduced into the evaporative heat exchanger 35 so that the lower the outside air temperature To is, the higher the outside air temperature To is, the higher the outside air temperature To is. .
上記実施例の各種温度や時間は例示であり、上記の値に限定されるものではない。その他、当業者であれば、本発明の趣旨を逸脱することなく上記実施例に種々の変更を付加した形態で実施可能であり、本発明はそのような変更形態を包含するものである。 The various temperatures and times in the above-described embodiment are merely illustrative, and the present invention is not limited to the above values. In addition, those skilled in the art can carry out the present invention in various modifications without departing from the spirit of the present invention, and the present invention includes such modifications.
１ ：貯湯給湯装置
２ ：ヒートポンプ熱源機
４ ：補助熱源機
５ ：貯湯タンク
５ａ〜５ｅ：貯湯温度センサ
７ ：制御部（制御手段）
１１ ：出湯通路
１３ ：給水通路
１６ ：給湯通路
１６ｂ ：給湯流量センサ
２１ ：循環加熱回路（循環回路）
２２ ：循環ポンプ（循環手段）
２３ ：補助加熱通路
２４ ：補助出湯通路
３２ ：圧縮機
３３ ：凝縮熱交換器
３４ ：膨張弁（膨張手段）
３５ ：蒸発熱交換器
３６ ：冷媒回路
３８ ：バイパス通路
３９ ：除霜弁（開閉弁）
1: hot water storage apparatus 2: heat pump heat source machine 4: auxiliary heat source machine 5: hot water storage tank 5a to 5e: hot water storage temperature sensor 7: control unit (control means)
11: Hot water supply passage 13: Water supply passage 16: Hot water supply passage 16b: Hot water supply flow rate sensor 21: Circulation heating circuit (circulation circuit)
22: Circulation pump (circulation means)
23: auxiliary heating passage 24: auxiliary discharge passage 32: compressor 33: condensing heat exchanger 34: expansion valve (expansion means)
35: Evaporative heat exchanger 36: Refrigerant circuit 38: Bypass passage 39: Defrost valve (open / close valve)
Claims (3)
前記制御手段は、外気温度と予測した給湯使用量に基づいて前記貯湯運転中に前記蒸発熱交換器の着霜の影響があると判定した場合には、前記貯湯運転中に前記外気温度に対応づけて予め設定された開閉パターンで前記開閉弁を開閉させることを特徴とする貯湯給湯装置。 A compressor, a condensing heat exchanger, expansion means, and an evaporation heat exchanger are connected by a refrigerant circuit, and a bypass passage bypassing the condensation heat exchanger and the expansion means, and opening and closing for opening and closing the bypass passage A heat pump heat source machine equipped with a valve, a hot water storage tank for storing hot water heated by the heat pump heat source machine, an auxiliary heat source machine capable of hot-watering the hot water of the hot water storage tank and detecting the outside air temperature Detection means and control means for predicting future hot water use based on learned and stored hot water use conditions and controlling hot water storage operation for storing heat quantity corresponding to predicted hot water use amount in the hot water storage tank before hot water use In the hot water storage system,
The control means copes with the outside air temperature during the hot water storage operation when it is determined that there is an influence of the frost formation of the evaporative heat exchanger during the hot water storage operation based on the hot water use amount predicted based on the outside air temperature. A hot water storage hot water supply device characterized by opening and closing the on-off valve according to an on-off pattern set in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017248582A JP7013854B2 (en) | 2017-12-26 | 2017-12-26 | Hot water storage and hot water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017248582A JP7013854B2 (en) | 2017-12-26 | 2017-12-26 | Hot water storage and hot water supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2019113278A true JP2019113278A (en) | 2019-07-11 |
| JP7013854B2 JP7013854B2 (en) | 2022-02-01 |
Family
ID=67221543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017248582A Active JP7013854B2 (en) | 2017-12-26 | 2017-12-26 | Hot water storage and hot water supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP7013854B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4249826A4 (en) * | 2020-12-28 | 2024-05-01 | Daikin Industries, Ltd. | Hot water supply system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006097930A (en) * | 2004-09-28 | 2006-04-13 | Denso Corp | Heat pump type heating device |
| JP2014214984A (en) * | 2013-04-26 | 2014-11-17 | 株式会社ノーリツ | Heat pump water heater |
| JP2014228193A (en) * | 2013-05-22 | 2014-12-08 | リンナイ株式会社 | Heat pump system |
| JP2016023921A (en) * | 2014-07-24 | 2016-02-08 | 株式会社ノーリツ | Heat pump hot water supply system |
| JP2016138702A (en) * | 2015-01-27 | 2016-08-04 | 株式会社コロナ | Heat pump type water heater |
| JP2017044446A (en) * | 2015-08-28 | 2017-03-02 | 株式会社ノーリツ | Heat pump device and water heater including the same |
-
2017
- 2017-12-26 JP JP2017248582A patent/JP7013854B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006097930A (en) * | 2004-09-28 | 2006-04-13 | Denso Corp | Heat pump type heating device |
| JP2014214984A (en) * | 2013-04-26 | 2014-11-17 | 株式会社ノーリツ | Heat pump water heater |
| JP2014228193A (en) * | 2013-05-22 | 2014-12-08 | リンナイ株式会社 | Heat pump system |
| JP2016023921A (en) * | 2014-07-24 | 2016-02-08 | 株式会社ノーリツ | Heat pump hot water supply system |
| JP2016138702A (en) * | 2015-01-27 | 2016-08-04 | 株式会社コロナ | Heat pump type water heater |
| JP2017044446A (en) * | 2015-08-28 | 2017-03-02 | 株式会社ノーリツ | Heat pump device and water heater including the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4249826A4 (en) * | 2020-12-28 | 2024-05-01 | Daikin Industries, Ltd. | Hot water supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7013854B2 (en) | 2022-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5175138B2 (en) | Water heater | |
| JP5095295B2 (en) | Water heater | |
| JP4867749B2 (en) | Heat pump water heater | |
| JP6977332B2 (en) | Hot water storage and hot water supply device | |
| KR20130115123A (en) | Heating system | |
| JP7135493B2 (en) | heat pump water heater | |
| JP3737357B2 (en) | Water heater | |
| JP7125001B2 (en) | Hot water storage water heater | |
| JP2019113278A (en) | Storage water heater | |
| JP2010032063A (en) | Outdoor unit and heat pump device | |
| JP7070825B2 (en) | Hot water storage and hot water supply device | |
| JP5746104B2 (en) | Hot water heating system | |
| JP7110730B2 (en) | Hot water storage water heater | |
| JP5293714B2 (en) | Air conditioner | |
| JP5440466B2 (en) | Air conditioner | |
| KR101489581B1 (en) | Thermal apparatus | |
| JP2009036487A (en) | Water heater | |
| JP6465332B2 (en) | Heat pump hot water supply system | |
| JP2006003077A (en) | Heat pump type hot water supply apparatus | |
| JP5218510B2 (en) | Air conditioner | |
| JP6969223B2 (en) | Heat pump heat source machine | |
| JP4515883B2 (en) | Hot water storage water heater | |
| JP7145381B2 (en) | Hot water storage water heater | |
| JP6327499B2 (en) | Heat pump water heater | |
| JP6935703B2 (en) | Hot water storage and hot water supply device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20201127 |
|
| 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: 20211221 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20211222 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20220103 |