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WO2021199433A1 - Chauffe-eau du type à stockage d'eau chaude - Google Patents

Chauffe-eau du type à stockage d'eau chaude Download PDF

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Publication number
WO2021199433A1
WO2021199433A1 PCT/JP2020/015345 JP2020015345W WO2021199433A1 WO 2021199433 A1 WO2021199433 A1 WO 2021199433A1 JP 2020015345 W JP2020015345 W JP 2020015345W WO 2021199433 A1 WO2021199433 A1 WO 2021199433A1
Authority
WO
WIPO (PCT)
Prior art keywords
hot water
heating capacity
water storage
boiling
water heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/015345
Other languages
English (en)
Japanese (ja)
Inventor
直紀 柴崎
風間　史郎
利幸 佐久間
謙作 畑中
▲泰▼成 松村
雄斗 黒森
洋真 黒柳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2022511485A priority Critical patent/JP7334850B2/ja
Priority to PCT/JP2020/015345 priority patent/WO2021199433A1/fr
Publication of WO2021199433A1 publication Critical patent/WO2021199433A1/fr
Anticipated expiration legal-status Critical
Priority to JP2023056965A priority patent/JP7622768B2/ja
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters

Definitions

  • This disclosure relates to a hot water storage type water heater.
  • hot water storage type water heaters In hot water storage type water heaters, in order to concentrate the boiling operation during the midnight hours when electricity charges are cheap, it is common practice to boil the entire amount of hot water in the hot water storage tank to the maximum temperature that can be set during the midnight hours. ing. In a hot water storage type water heater, it is common to combine a hot water storage tank with a heating means having a heating capacity capable of completing boiling of the entire amount during the midnight hours.
  • Patent Document 1 describes a hot water storage type water heater whose heating capacity can be changed.
  • the boiling operation of the hot water storage type water heater described in Patent Document 1 in the midnight time zone the boiling operation is performed with a heating capacity capable of completing the boiling of the entire amount by the end time of the midnight time zone. If hot water is suddenly used during this boiling operation and it is determined that boiling of the required amount of hot water is not completed, the heating capacity is changed to a higher heating capacity.
  • the heating capacity of the boiling operation during the midnight hours is set to the heating capacity that can boil the entire amount of hot water in the hot water storage tank, and if it is not necessary to boil the entire amount of hot water in the hot water storage tank, On the contrary, there is a risk that energy efficiency will be low.
  • This disclosure is made to solve the above-mentioned problems, and is an improved hot water storage type water heater that can perform boiling operation with efficient heating capacity even when the total amount of boiling is not required.
  • the purpose is to provide.
  • the hot water storage type water heater has a heating means configured to change the heating capacity for heating water, a hot water storage tank capable of storing water heated by the heating means, and a heating capacity of the heating means. It is provided with a control device configured to control switching and to control a boiling operation in which water heated by a heating means is stored in a hot water storage tank.
  • the rated heating capacity of the heating means is lower than the heating capacity capable of completing the total boiling of the total amount of water in the hot water storage tank to the settable maximum hot water storage temperature during the low charge time period.
  • the boiling operation when the amount of heat that needs to be boiled is small, the boiling operation can be performed with an efficient heating capacity.
  • FIG. 1 is a diagram schematically showing an overall configuration of a hot water storage type water heater according to a first embodiment of the present disclosure.
  • the hot water storage type water heater 35 includes a tank unit 33, an HP (heat pump) unit 7, and a remote control device 44.
  • the HP unit 7 and the tank unit 33 are connected to each other via an HP going pipe 14, an HP returning pipe 15, and an electric wiring (not shown).
  • the tank unit 33 has a built-in control device 36.
  • the operation of various valves, pumps, etc. included in the tank unit 33 and the HP unit 7 is controlled by the control device 36 electrically connected to them.
  • the control device 36 and the remote control device 44 are connected by wire or wireless so that they can communicate with each other.
  • the remote control device 44 is an example of a user interface.
  • the remote controller 44 is equipped with a display unit that displays information such as the operating state of the hot water storage type water heater 35, an operation unit such as a switch operated by the user, a speaker, a microphone, and the like.
  • the operation unit receives the user's operation regarding the operation operation command of the hot water storage type water heater and the change of the set value.
  • the remote controller 44 may be installed on a wall such as a kitchen, a living room, or a bathroom.
  • a plurality of remote control devices 44 may be able to communicate with the control device 36.
  • a mobile terminal such as a smartphone may have a function as a user interface such as the remote control device 44.
  • the mobile terminal and the control device 36 may be configured to be able to communicate with each other via a network.
  • the HP unit 7 functions as a heating means for heating water.
  • the HP unit 7 constitutes a heat pump cycle by connecting the compressor 1, the water-refrigerant heat exchanger 3, the expansion valve 4, and the air heat exchanger 6 in an annular shape by the refrigerant pipe 5.
  • the water-refrigerant heat exchanger 3 is for exchanging heat between the refrigerant flowing through the refrigerant pipe 5 and the low-temperature water led from the tank unit 33.
  • the value of the heating capacity of the HP unit 7 by the refrigerant circuit can be changed.
  • the heating capacity of the HP unit 7 may be simply referred to as "heating capacity”.
  • the heating capacity corresponds to, for example, the amount of heat that the HP unit 7 gives to water per hour.
  • the unit of heating capacity is, for example, kW (kilowatt).
  • the tank unit 33 contains the following various parts and pipes.
  • the hot water storage tank 8 is for storing hot water.
  • a third water supply pipe 9c is connected to the water introduction port 8a provided at the lower part of the hot water storage tank 8.
  • the water supplied from a water source such as tap water is adjusted to a predetermined pressure by the pressure reducing valve 31, and then flows into the hot water storage tank 8 through the third water supply pipe 9c.
  • the hot water supply pipe 21 for supplying the hot water stored in the hot water storage tank 8 to the outside of the hot water storage type water heater 35 and the hot water supply pipe 13 are connected to the hot water introduction outlet 8d provided in the upper part of the hot water storage tank 8. Has been done.
  • the hot water heated by the HP unit 7 flows into the hot water storage tank 8 from the hot water introduction outlet 8d.
  • the low temperature water from the third water supply pipe 9c flows into the hot water storage tank 8 from the water introduction port 8a.
  • hot water is stored in the hot water storage tank 8 so that a temperature difference occurs between the upper and lower parts.
  • a plurality of hot water storage temperature sensors 42, 43 are attached to the surface of the hot water storage tank 8 at different heights. By detecting the temperature distribution of the hot water in the hot water storage tank 8 with these hot water storage temperature sensors 42 and 43, the amount of remaining hot water in the hot water storage tank 8 is grasped, and based on this, the hot water in the hot water storage tank 8 is boiled by the HP unit 7. The start and stop of raising operation are controlled.
  • a heat source pump 12 and a bath heat exchanger 20 are built in the tank unit 33.
  • the heat source pump 12 is a pump for circulating hot water to various pipes described later in the tank unit 33, and is provided on the HP going pipe 14.
  • the bath heat exchanger 20 is a heat exchanger for heating the water to be heated (bathtub water, heating water, etc.) on the secondary side by using the high temperature hot water supplied from the hot water storage tank 8 or the HP unit 7. be.
  • a bath going pipe 27 and a bath returning pipe 28 for circulating hot water in the bathtub 30 will be illustrated and described.
  • the bath heat exchanger 20 is installed in the middle of the bath going pipe 27 and the bath returning pipe 28. Further, a bath circulation pump 29 for circulating bathtub water is installed in the middle of the bath return pipe 28.
  • the three-way valve 11 is a flow path switching means having an a port and a b port for hot water to flow in and a c port for hot water to flow out, and flows between two paths, ac and bc. You can switch routes.
  • the four-way valve 18 is a flow path switching means having b-ports and c-ports for hot water to flow in and a-ports and d-ports for hot water to flow out, and has four routes, ba, ca, b-. The flow path can be switched between d and cd.
  • the water outlet pipe 10 connects the water outlet 8b provided at the bottom of the hot water storage tank 8 with the a port of the three-way valve 11.
  • the HP going pipe 14 connects the c port of the three-way valve 11 to the inlet side of the HP unit 7.
  • the HP return pipe 15 connects the outlet side of the HP unit 7 and the c port of the four-way valve 18.
  • the hot water supply pipe 13 connects the d port of the four-way valve 18 and the hot water introduction outlet 8d at the upper part of the hot water storage tank 8.
  • the first bypass pipe 16 connects the a port of the four-way valve 18 and the hot water introduction port 8c provided between the central portion and the lower portion of the hot water storage tank 8.
  • the hot water introduction pipe 20a branches from the middle of the hot water supply pipe 13 and is connected to the primary side inlet of the bath heat exchanger 20.
  • the hot water outlet pipe 20b connects the primary side outlet of the bath heat exchanger 20 and the b port of the three-way valve 11.
  • the second bypass pipe 17 branches from between the heat source pump 12 in the HP going pipe 14 and the inlet side of the HP unit 7, and is connected to the b port of the four-way valve 18.
  • the first water supply pipe 9a is connected to a water source such as water supply, and the second water supply pipe 9b and the third water supply pipe 9c are connected to the other end of the first water supply pipe 9a via a pressure reducing valve 31.
  • the second water supply pipe 9b branches from the middle and is connected to the hot water supply mixing valve 22 and the bath mixing valve 23.
  • the hot water supply pipe 21 branches from the middle and is connected to the hot water supply mixing valve 22 and the bath mixing valve 23.
  • the first hot water supply pipe 24 is connected to the outlet of the hot water supply mixing valve 22, and the second hot water supply pipe 25 is connected to the outlet of the bath mixing valve 23.
  • a bath solenoid valve 26 for opening and closing the second hot water supply pipe 25 and a bath flow rate sensor 45 for detecting the flow rate of hot water passing through the second hot water supply pipe 25 are provided.
  • the hot water mixing valve 22 and the bath mixing valve 23 are remote control devices by the user by adjusting the flow rate ratio of the high temperature hot water supplied from the hot water supply pipe 21 and the low temperature water supplied from the second water supply pipe 9b. Generates hot water at the set temperature set in 44.
  • the hot water adjusted to the set temperature by the hot water supply mixing valve 22 is supplied from the first hot water supply pipe 24 to a faucet (not shown) such as a shower or a curan used by the user via a hot water tap 34.
  • the hot water adjusted to the set temperature by the bath mixing valve 23 is supplied from the second hot water supply pipe 25 to the bathtub 30 via the bath solenoid valve 26, the bath flow sensor 45, the bath going pipe 27, and the bath returning pipe 28. Will be done.
  • the heating capacity of the HP unit is 4.5 kW with respect to the tank capacity of 370 L
  • the heating capacity of the HP unit is 6.0 kW with respect to the tank capacity of 460 L.
  • the midnight time zone is exemplified as a time zone in which the electricity charge unit price is cheaper than other time zones among 24 hours a day, but the present invention is not limited to this, and the electricity charge unit price is one day.
  • the present disclosure can also be applied when there is a low-priced time zone within 24 hours, which is lower than other time zones.
  • the HP unit 7 of the hot water storage type water heater 35 has a rated heating capacity lower than the heating capacity capable of completing boiling in the middle of the night. That is, the rated heating capacity of the HP unit 7 in the present embodiment is lower than the heating capacity of the HP unit installed in the conventional hot water storage type water heater having the same capacity as the hot water storage tank 8.
  • the rated heating capacity corresponds to, for example, the heating capacity when operating under the performance evaluation conditions according to JIS.
  • the HP unit 7 has a rated heating capacity as a standard heating capacity, and a normal heating capacity is set to the rated heating capacity.
  • FIG. 2 is a diagram showing the relationship between the heating capacity of the HP unit 7 of the first embodiment and the amount of boiling water.
  • the hot water storage type water heater 35 according to the present embodiment, as shown in FIG. 2, for example, if the capacity of the hot water storage tank 8 is 370 L, the HP unit 7 having a rated heating capacity of 4.1 kW is combined to store hot water. If the capacity of the tank 8 is 460 L, the HP unit 7 having a rated heating capacity of 5.1 kW can be combined.
  • the combination of the capacity and the heating capacity of these hot water storage tanks is a combination in which the total amount of boiling may not be completed during the midnight time zone, for example, 8 hours.
  • the rated heating capacity of the HP unit 7 is set to be lower than that of the conventional one, so that the boiling amount is low during the midnight hours and during the daytime boiling operation. It can be operated with heating capacity and can improve COP.
  • the control device 36 controls the operation of the boiling operation.
  • the boiling operation is an operation in which low-temperature hot water is taken out from the lower part of the hot water storage tank 8, heated by the HP unit 7, and the heated high-temperature water flows into the hot water storage tank 8 from the upper part of the hot water storage tank 8.
  • the control device 36 predicts that the heating capacity of the HP unit 7 is insufficient, the control device 36 switches the heating capacity of the HP unit 7 from the rated heating capacity to a high heating capacity a2 higher than the rated heating capacity. ..
  • control device 36 controls to boil the hot water in the hot water storage tank 8 to the target hot water storage temperature every day during the midnight time zone. This is to concentrate the boiling operation in the midnight hours when the electricity rate is cheap.
  • the boiling operation performed in the midnight time zone is performed in one of two modes, the first mode and the second mode.
  • the first mode is a mode in which the boiling operation is performed with the target hot water storage temperature set to a temperature lower than the maximum hot water storage temperature.
  • the maximum hot water storage temperature is the highest temperature within the range that can be set as the hot water storage temperature.
  • the target hot water storage temperature in the first mode will also be referred to as a “low target temperature”.
  • the second mode is a mode in which the target hot water storage temperature is set as the maximum hot water storage temperature and the entire amount of hot water in the hot water storage tank 8 is boiled to the maximum hot water storage temperature.
  • the boiling in the second mode will also be referred to as "total boiling".
  • the second mode is a mode in which a larger amount of boiling is performed than in the first mode.
  • the maximum hot water storage temperature is 90 ° C. as an example, and in this case, the low target temperature is, for example, 85 ° C.
  • the control device 36 is configured to execute the boiling operation in the first mode in the midnight time zone at normal times.
  • the heating capacity of the HP unit 7 when boiling in the first mode is the rated heating capacity.
  • the control device 36 starts the boiling operation every day when the start time of the midnight time zone is reached, and the temperature of the hot water taken out from the lower part of the hot water storage tank 8 and flowing into the HP unit 7 reaches the low target temperature. The boiling operation is terminated at this stage.
  • the second mode it is determined that it is necessary to boil a larger amount of hot water during the midnight hours, for example, when it is expected that the amount of hot water used the next day will be higher than usual. It is done when When the total amount of heat is boiled in the second mode, if the heating capacity is expected to be insufficient for the total amount of heat required for boiling (hereinafter referred to as "required heating amount of heat"), the heating capacity of the HP unit 7 is increased. , The rated heating capacity can be switched to high heating capacity.
  • FIG. 3 is a diagram showing a change in the amount of boiling water when the heating capacity of the HP unit 7 is switched in the middle of boiling the entire amount in the midnight time zone.
  • the heating capacity is switched from the rated heating capacity to a higher heating capacity higher than the rated heating capacity at the timing 4 hours after the start of the midnight time zone, so that the entire amount is boiled during the midnight time zone. The raising can be completed.
  • the timing when switching the heating capacity in the second mode is calculated as follows. First, by subtracting the amount of remaining hot water in the hot water storage tank 8 (that is, the amount of heat storage) at the start time of the midnight time zone from the amount of heat when the total amount of hot water in the hot water storage tank 8 is set to the maximum hot water storage temperature, the amount of hot water in the hot water storage tank 8 is subtracted during the midnight time zone. The amount of heat that needs to be boiled The amount of heat that needs to be boiled is calculated.
  • the rated heating capacity is used so that the boiling is completed in the midnight time zone.
  • the control device 36 When boiling in the second mode, the control device 36 performs the boiling operation at the rated heating capacity during the first hour H1 from the start time of the midnight time zone, and at the time when the first hour H1 elapses. , The heating capacity of the HP unit 7 is switched from the rated heating capacity to the high heating capacity, and the boiling operation is continued. The control device 36 ends the boiling operation when the temperature of the hot water flowing into the HP unit 7 reaches the maximum hot water storage temperature. As a result, when the amount of hot water supplied during the daytime is large, a sufficient amount of hot water can be secured in the hot water storage tank 8. If the second time H2 calculated as described above is zero or less, it is expected that the entire amount of boiling can be completed at the rated heating capacity during the midnight time zone, so the heating capacity is not switched. ..
  • the hot water storage type water heater 35 in normal times, boiling is performed with a rated heating capacity lower than the heating capacity capable of completing boiling in the middle of the night. As a result, the energy efficiency of the hot water storage type water heater 35 can be increased, and when it is necessary to boil the entire amount, the heating capacity can be switched to the high heating capacity for the minimum time required to secure the amount of heat. As a result, it is possible to suppress the occurrence of insufficient hot water during the daytime.
  • the rated heating capacity is at least lower than the maximum heating capacity of the HP unit 7 and lower than the high heating capacity. Further, the rated heating capacity is set to at least the capacity that can complete the boiling at the low target temperature of the first mode within the midnight time zone.
  • the operating cost of the hot water storage type water heater 35 can be reduced and it is recognized as a nighttime heat storage type device by configuring the boiling water to a low target temperature by using the midnight time zone. If the rated heating capacity is set too low, the COP may decrease. Therefore, the rated heating capacity may be set to the capacity at which the COP is the best.
  • the heating capacity of the HP unit 7 is the rated heating capacity when boiling in the first mode.
  • COP can be improved.
  • the present invention is not limited to this, and for example, when the rated heating capacity is low and the heating capacity is expected to be insufficient even when boiling in the first mode, as in the case of the second mode, in the middle of the process. It may be configured to switch to a high heating capacity. As a result, the required amount of heat can be reliably secured.
  • the hot water storage type water heater 35 may have a configuration in which the user can set the heating capacity to be fixed to the rated heating capacity by the remote control device 44. While the control device 36 is set to be fixed at the rated heating capacity, the control device 36 does not change to the high heating capacity even when the entire amount is boiled at midnight, and the target hot water storage temperature is lowered while maintaining the rated heating capacity. Boil as the target temperature. For example, when the user attaches great importance to COP, the user's setting is prioritized, and the usability of the user of the hot water storage type water heater 35 can be improved.
  • the hot water storage type water heater 35 may have a configuration in which the user can set the heating capacity to be fixed to a high heating capacity by a remote control device. While the control device 36 is set to be fixed to a high heating capacity, the control device 36 is operated with a high heating capacity with the target hot water storage temperature as the maximum hot water storage temperature even when the boiling is executed in the first mode at midnight. I do. For example, when the user attaches great importance to preventing the shortage of hot water, the user's setting can be prioritized, and the usability of the user of the hot water storage type water heater 35 can be improved.
  • the hot water storage type water heater 35 may have a configuration in which the user can set the total amount of boiling in the midnight time zone by the remote control device 44.
  • the boiling operation in the midnight time zone is set to the second mode, and the total amount of boiling is executed.
  • the second time H2 which is the time for the boiling operation with the high heating capacity, is calculated as described above, and the end time of the midnight time zone is calculated.
  • the HP unit 7 is switched to a high heating capacity and boiling is performed. As a result, the amount of hot water stored by the user can be secured.
  • the hot water storage type water heater 35 may have a configuration in which the user can instruct the start of boiling the whole amount by the remote control device 44.
  • the remote controller device 44 may be provided with a "full tank” button for boiling the entire amount, and by pressing this button, the start of boiling the entire amount may be instructed.
  • the control device 36 When the remote control device 44 receives the instruction of "full tank”, the control device 36 immediately switches the heating capacity of the HP unit 7 to the high heating capacity and starts the operation in the second mode. As a result, it is possible to give priority to boiling quickly in response to the user's instruction.
  • the rated heating capacity is used. After the boiling of the above, the case where the boiling is performed with a high heating capacity for H2 for the second hour has been described. At the start of the midnight time zone, it is expected that there will be a lot of power usage by other devices. Therefore, from the start time of the midnight time zone to the first hour H1, the peak power consumption can be suppressed by carrying out the boiling operation with the rated heating capacity having low power consumption.
  • the hot water storage type water heater 35 is not limited to the configuration in which the operation at the rated heating capacity is performed first. In the case of boiling the whole amount, it is possible to continue the boiling operation by switching to the rated heating capacity after boiling with a high heating capacity during the above-mentioned second hour H2 from the start of the midnight time zone. good. By starting boiling with a high heating capacity at the start of the midnight time zone, it is possible to cope with a case where hot water is used in the middle and the amount of remaining hot water in the hot water storage tank 8 is reduced.
  • the operating time for boiling with a high heating capacity should be extended so that the required amount of heating heat is secured even after the hot water is used. Just do it.
  • the required amount of heat can be secured by switching to the high heating capacity again.
  • the user determines whether the boiling operation at the rated heating capacity is performed first or the boiling operation at the high heating capacity is performed first by the remote controller device 44. It may have a configuration that can be set.
  • the control device 36 is configured to switch the heating capacity in an order according to the user's selection when the whole amount is boiled.

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  • 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

La présente divulgation concerne un chauffe-eau du type à stockage d'eau chaude, le chauffe-eau comprenant : un moyen de chauffage conçu de sorte que la capacité de chauffage permettant de chauffer de l'eau puisse être modifiée ; un réservoir de stockage d'eau chaude pouvant stocker l'eau chauffée par le moyen de chauffage ; et un dispositif de commande conçu pour commander la commutation de la capacité de chauffage du moyen de chauffage et pour commander un fonctionnement d'ébullition destiné à stocker l'eau chauffée par le moyen de chauffage dans le réservoir de stockage d'eau chaude. Pendant des périodes à bas prix, la capacité de chauffage nominale du moyen de chauffage est inférieure à une capacité de chauffage pouvant achever une ébullition totale, laquelle fait bouillir toute l'eau dans le réservoir de stockage d'eau chaude jusqu'à la température d'eau chaude réglable maximale.
PCT/JP2020/015345 2020-04-03 2020-04-03 Chauffe-eau du type à stockage d'eau chaude Ceased WO2021199433A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2022511485A JP7334850B2 (ja) 2020-04-03 2020-04-03 貯湯式給湯機
PCT/JP2020/015345 WO2021199433A1 (fr) 2020-04-03 2020-04-03 Chauffe-eau du type à stockage d'eau chaude
JP2023056965A JP7622768B2 (ja) 2020-04-03 2023-03-31 貯湯式給湯機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/015345 WO2021199433A1 (fr) 2020-04-03 2020-04-03 Chauffe-eau du type à stockage d'eau chaude

Publications (1)

Publication Number Publication Date
WO2021199433A1 true WO2021199433A1 (fr) 2021-10-07

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PCT/JP2020/015345 Ceased WO2021199433A1 (fr) 2020-04-03 2020-04-03 Chauffe-eau du type à stockage d'eau chaude

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WO (1) WO2021199433A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007093113A (ja) * 2005-09-29 2007-04-12 Sanyo Electric Co Ltd ヒートポンプ式給湯機
JP2007132594A (ja) * 2005-11-10 2007-05-31 Corona Corp 貯湯式給湯装置
JP2009047334A (ja) * 2007-08-17 2009-03-05 Corona Corp ヒートポンプ式給湯機
WO2009057303A1 (fr) * 2007-11-02 2009-05-07 Panasonic Corporation Système d'alimentation en eau chaude
JP2010127569A (ja) * 2008-11-28 2010-06-10 Daikin Ind Ltd 貯湯式給湯装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007093113A (ja) * 2005-09-29 2007-04-12 Sanyo Electric Co Ltd ヒートポンプ式給湯機
JP2007132594A (ja) * 2005-11-10 2007-05-31 Corona Corp 貯湯式給湯装置
JP2009047334A (ja) * 2007-08-17 2009-03-05 Corona Corp ヒートポンプ式給湯機
WO2009057303A1 (fr) * 2007-11-02 2009-05-07 Panasonic Corporation Système d'alimentation en eau chaude
JP2010127569A (ja) * 2008-11-28 2010-06-10 Daikin Ind Ltd 貯湯式給湯装置

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JP2023078464A (ja) 2023-06-06
JP7334850B2 (ja) 2023-08-29
JP7622768B2 (ja) 2025-01-28
JPWO2021199433A1 (fr) 2021-10-07

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