WO2022185386A1 - Dispositif d'alimentation en eau chaude du type à stockage d'eau chaude - Google Patents

Dispositif d'alimentation en eau chaude du type à stockage d'eau chaude Download PDF

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Publication number
WO2022185386A1
WO2022185386A1 PCT/JP2021/007749 JP2021007749W WO2022185386A1 WO 2022185386 A1 WO2022185386 A1 WO 2022185386A1 JP 2021007749 W JP2021007749 W JP 2021007749W WO 2022185386 A1 WO2022185386 A1 WO 2022185386A1
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WO
WIPO (PCT)
Prior art keywords
hot water
power consumption
water storage
instruction value
control unit
Prior art date
Application number
PCT/JP2021/007749
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English (en)
Japanese (ja)
Inventor
直紀 柴崎
史郎 風間
謙作 畑中
▲泰▼成 松村
洋真 黒柳
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2023503551A priority Critical patent/JPWO2022185386A1/ja
Priority to PCT/JP2021/007749 priority patent/WO2022185386A1/fr
Publication of WO2022185386A1 publication Critical patent/WO2022185386A1/fr

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    • 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 storage hot water heater.
  • the amount of power consumed varies from time to time. If the amount of power consumed in a power supply area increases and exceeds the amount of power supplied to that power supply area, there is a risk of a large-scale power outage. A balance with quantity is desired.
  • a hot water supply control system determines the number of heat pump units in boiling operation.
  • the amount of power supplied and the amount of power consumed are balanced.
  • the COP heating capacity/power consumption: Coefficient of Performance
  • the actual power consumption during boiling does not necessarily match the expected power consumption.
  • the actual power consumption exceeds the predicted power consumption, there is a risk that the power consumption will exceed the target power consumption in the control that determines the number of heat pump units in operation based on the predicted power consumption.
  • the present disclosure provides hot water storage that is improved so that power consumption can be easily adjusted according to the allowable value of peak power even when the COP of the hot water storage type hot water heater changes.
  • the purpose is to provide a type water heater.
  • the hot water storage type water heater according to the present disclosure is driven by electric power and has a heat pump cycle for heating water, a heating means capable of changing the heating capacity, a hot water storage tank, and hot water heated by the heating means in the hot water storage tank. and a control unit for controlling the accumulated boiling operation.
  • the control unit adjusts the heating capacity of the heating means so that the power consumption during the boiling operation is equal to or less than the power consumption instruction value set as the upper limit of the power that can be used in the boiling operation. is configured to run
  • FIG. 1 is a schematic diagram showing the configuration of a hot water storage type hot water heater and its peripheral equipment according to Embodiment 1 of the present disclosure
  • Fig. 4 is a flowchart for explaining the control operation of the boiling operation of the hot water storage type water heater according to the first embodiment of the present disclosure
  • FIG. 4 is a diagram for explaining control of adjustment of a power consumption instruction value performed between the storage-type hot water heater and the HEMS according to Embodiment 1 of the present disclosure
  • 4 is a flowchart showing operations when the minimum required power consumption of the hot water storage type hot water heater according to Embodiment 1 of the present disclosure is greater than the power consumption instruction value.
  • the calorific value of hot water is calculated, for example, as a difference from the calorific value of water having a temperature equal to that of water supplied from a water source.
  • the calorie of hot water is described in units of the quantity of hot water [L] when converted into the calorie of hot water at a predetermined standard hot water supply temperature.
  • the value of the standard hot water supply temperature is 40° C., for example.
  • simply describing “water” or “hot water” may include liquid water of any temperature, from low-temperature water to high-temperature hot water.
  • FIG. 1 is a schematic diagram showing the overall configuration of a system including a hot water storage type hot water heater and peripheral devices thereof according to Embodiment 1 of the present disclosure.
  • a hot water storage type hot water heater 35 is installed in each of ordinary houses 1a and 1b.
  • the installation location of the hot water storage type water heater 35 is not limited to a general house.
  • the hot water storage type water heater 35 may be, for example, a domestic one or a commercial one used in a facility or the like.
  • the hot water storage type water heater 35 is a hot water storage type heat pump water heater that includes a hot water storage tank unit 33 and a heat pump unit (hereinafter "HP" unit) 7 .
  • the HP unit 7 and the hot water storage tank unit 33 are connected via pipes 16 and 17 through which water flows, and electrical wiring (not shown).
  • the HP unit 7 is driven by electric power and functions as heating means for heating the low temperature water led from the hot water storage tank 8 provided in the hot water storage tank unit 33 .
  • the HP unit has equipment such as a compressor, a water refrigerant heat exchanger, an expansion valve and an air heat exchanger. These devices are annularly connected by pipes or the like, and constitute a refrigerant circuit in which a refrigerant is circulated by a compressor.
  • a refrigerant circuit corresponds to a heat pump cycle that heats water.
  • the water-refrigerant heat exchanger heats water, which has flowed in through an inlet, with a refrigerant, and causes the heated water to flow out through an outlet.
  • Air heat exchangers exchange heat between air and refrigerant.
  • the value of the heating capacity of the refrigerant circuit of the HP unit 7 can be changed.
  • the heating capacity of the refrigerant circuit of the HP unit 7 may be simply referred to as "heating capacity".
  • the heating capacity corresponds to the amount of heat given to water by the HP unit 7 per hour.
  • the unit of heating capacity is kW (kilowatt), for example.
  • the compressor of the HP unit 7 is driven by a drive device (not shown) equipped with, for example, an inverter-controlled DC brushless motor.
  • a drive device (not shown) equipped with, for example, an inverter-controlled DC brushless motor.
  • the hot water storage type hot water heater 35 is not limited to one using such a drive device.
  • the configuration may be such that the pressure and temperature of the refrigerant to be discharged, or the value of the heating capacity is changed.
  • the hot water storage tank unit 33 contains various parts and piping.
  • the hot water storage tank 8 is for storing hot water.
  • a plurality of hot water temperature sensors (not shown) 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, the remaining hot water amount and heat storage amount in the hot water storage tank 8 can be grasped.
  • the control unit 36 and the remote controller 44 are connected by wire or wirelessly so that they can communicate bidirectionally.
  • the control unit 36 and the remote control 44 may be able to communicate via a network.
  • Remote control 44 is an example of a user interface.
  • the remote controller 44 has a display section that displays information and an operation section that can be operated by the user.
  • the remote controller 44 may have a touch screen that functions as both a display and an operation unit.
  • the operation unit of the remote controller 44 has a function as an input means for receiving operation inputs of commands relating to the operation and set values of the storage-type water heater 35 .
  • a person such as a user can remotely control the hot water storage type water heater and perform various settings by operating the operation unit.
  • the display unit has a function as an informing means for informing a person such as a user of information.
  • the remote controller 44 in the present embodiment has a display unit as notification means, but as a modification, it may have other notification means such as a voice guidance device.
  • the remote controller 44 may be installed, for example, on the wall of the kitchen, living room, bathroom, or the like. Alternatively, for example, a mobile information terminal such as a smartphone may be configured to have a user interface function such as the remote control 44 .
  • a plurality of remote controllers 44 may be configured to communicate with the control unit 36 .
  • a controller 36 is built into the hot water storage tank unit 33 .
  • the hot water storage type hot water heater 35 may have, for example, a controller connected to each of the hot water storage tank unit 33 and the HP unit 7 so as to be able to communicate bidirectionally. In this case, these controllers cooperate to control the operation of the storage hot water heater.
  • the control unit 36 includes a microcomputer or the like having a memory and a processor.
  • the control unit 36 receives the outputs of various sensors provided in the hot water storage type hot water heater 35 and information on user's operation details for the remote control 44 .
  • the controller 36 is also electrically connected to various valves, pumps, etc. provided in the hot water storage tank unit 33 and the HP unit 7 .
  • the control unit 36 controls the operating state of the pumps contained in the HP unit 7 and the hot water storage tank unit 33 and the flow path direction or switching position of the valves based on input information from various sensors and the remote controller 44.
  • the operations of the HP unit 7 and the hot water storage tank unit 33 are respectively controlled.
  • the control unit 36 executes the boiling operation and the like, and also controls the boiling temperature in the boiling operation and the heating capacity of the HP unit 7 .
  • the control unit 36 is communicably connected to an energy management system 50, which is an external device.
  • the energy management system 50 is a system called HEMS (Home Energy Management System), which is connected to a plurality of electric devices used in each house 1a, 1b to be managed, and controls and manages them.
  • HEMS50 Home Energy Management System
  • the electric equipment which HEMS50 manages is connected so that HEMS50 and communication are possible.
  • These electric appliances may include electric appliances such as IH cooking heaters, washing machines, televisions, and refrigerators, air conditioners, lighting equipment, ventilation fans, power storage equipment, and the like, in addition to hot water heaters.
  • the HEMS 50 can receive information, for example, via the Internet, from the power supply side, which is the main body of the system power supply or power generation equipment.
  • the HEMS 50 receives an indication of allowable peak power, which is the maximum allowable power usage, from the power supplier.
  • the HEMS 50 calculates the power consumption instruction value of the hot water storage type water heater 35 based on the allowable peak power.
  • the power consumption instruction value is a target value within which the power consumption of the hot water storage type water heater 35 should be kept within that range.
  • the control unit 36 Upon receiving the power consumption instruction value from the HEMS 50, the control unit 36 operates by adjusting the heating capacity of the HP unit 7 so that the power consumption during the boiling operation is equal to or less than the power consumption instruction value.
  • the control unit 36 performs a boiling operation in which the necessary amount of hot water is boiled and stored in the hot water storage tank 8 during the midnight hours.
  • the "late night time period" is a low electricity price time period in which the unit price of electricity is cheaper than other time periods of the day. Electricity charges can be reduced by securing the necessary amount of hot water storage during late-night hours when the unit price of electricity is low.
  • a time zone other than the midnight time zone is referred to as a "non-midnight time zone". In the non-midnight time zone, the electricity rate unit price is higher than in the late night time zone.
  • the start time and end time of the late-night time zone and the non-midnight time zone are not limited to this example, and may change according to the contract with the power supplier.
  • "one day" is assumed to consist of a late-night time period and the previous non-midnight time period.
  • the control unit 36 stores information on the start time and end time of the late-night time period and the non-midnight time period.
  • the control unit 36 has a timer function and can determine whether the current time is in the midnight time zone or in the non-midnight time zone. Further, the control unit 36 may acquire information about the start time and end time of the late-night time period and the non-midnight time period from the remote control 44 or the HEMS 50 .
  • the control unit 36 always calculates the target heat storage amount, which is the amount of heat required to be stored in the hot water storage tank 8, as the required hot water storage amount. Specifically, for example, the control unit 36 calculates the amount of heat used for hot water supply based on the water supply temperature, the hot water supply temperature, and the hot water supply flow rate detected by various sensors installed in the hot water storage tank unit 33 .
  • the control unit 36 stores data related to the hot water supply heat amount calculated during the past predetermined period (for example, the past two weeks), and learns the hot water supply heat amount by, for example, statistically processing the hot water supply heat amount used during the past predetermined period. do. Note that the control unit 36 may be configured to learn the amount of heat used for hot water supply at each hour of the day.
  • the required hot water storage amount is calculated based on the learned amount of heat used for hot water supply.
  • FIG. 2 is a flowchart for explaining the control operation of the boiling operation. The operation of the boiling operation will be described with reference to FIG. The control operation in FIG. 2 is repeatedly executed at regular control intervals.
  • step S10 the power consumption instruction value from the HEMS 50 is obtained.
  • step S11 an estimated heating capacity is calculated.
  • the estimated heating capacity is obtained by obtaining the outside air temperature and the temperature of the water entering the HP unit 7, and the energy consumption efficiency estimated by any one of the obtained outside air temperature, the water entering temperature, and the target hot water storage temperature, or a combination thereof, and the consumption It is a heating capacity value that does not exceed the power consumption instruction value estimated from the power instruction value.
  • the amount of remaining hot water is obtained in S12, and the boiling start time is calculated in S13.
  • the difference between the required amount of stored hot water and the amount of remaining hot water is calculated for the boiling time required for boiling with the estimated heating capacity. Then, the time before the target time for completing the boiling of the required amount of hot water is calculated as the boiling start time.
  • the boiling time is about 4 hours.
  • 3:00 a.m. is the start time of boiling.
  • step S14 it is determined whether or not the boiling start time has come. If it is determined in step S14 that the boiling start time has not yet come, the current process ends. On the other hand, when it is recognized in step S14 that the boiling start time has come, the boiling operation is started with the calculated estimated heating capacity, and after the required amount of hot water is stored, the boiling is finished. is terminated.
  • FIG. 3 is a diagram for explaining control of adjustment of the power consumption instruction value performed between the control unit 36 and the HEMS 50. As shown in FIG. This control will be described below with reference to FIG.
  • step S21 the control unit 36 acquires the amount of heat used for hot water supply, and in step S22, calculates the minimum required heating capacity that does not cause running out of hot water at the present time based on the amount of heat used for hot water supply.
  • the minimum required heating capacity is calculated, for example, from the start time of the late-night time period when the electricity rate is cheaper and the required hot water storage amount at the end time of the non-midnight time period, so that heating can be completed during the late-night time period. do. Also, at this time, the time when the required hot water storage amount needs to be secured is taken into consideration.
  • the minimum required heating capacity is Approximately 3 kW.
  • the minimum required heating capacity may be calculated without considering the non-midnight hours, for example, by using the time at which the required amount of hot water needs to be secured as the boiling completion time.
  • step S23 with respect to the calculated minimum required heating capacity, the minimum required power consumption is calculated from any one of the outside air temperature, the water inlet temperature to the HP unit 7, and the target hot water storage temperature, or a combination thereof. .
  • the calculated minimum required power consumption is transmitted to HEMS50 in step S24.
  • the HEMS 50 receives the required minimum power consumption.
  • the HEMS 50 recalculates the power consumption instruction value for each electrical device managed by the HEMS 50 based on the minimum required power consumption, and redetermines the power consumption instruction value for the storage-type water heater 35 .
  • HEMS50 transmits the determined power consumption instruction value to the control part 36 of the storage-type water heater 35, and the other electric equipment which HEMS50 manages by following step S32.
  • the control unit 36 receives the power consumption instruction value recalculated in step S25. Thereafter, in step S26, the boiling start time is recalculated according to the procedure of FIG. 2 based on the power consumption instruction value. In this way, the risk of running out of hot water can be reduced by readjusting the power consumption instruction value based on the minimum required power consumption.
  • FIG. 4 is a flow chart showing the operation when the power consumption instruction value is smaller than the minimum required power consumption.
  • step S41 it is determined whether or not the power consumption instruction value is lower than the minimum required power consumption.
  • the power consumption instruction value is the latest power consumption instruction value received last by the control unit 36 . If it is determined in step S41 that the power consumption instruction value is greater than or equal to the minimum required power consumption, the current process ends. That is, by the process of FIG. 2, boiling is performed with the estimated heating capacity at the boiling start time.
  • step S42 it is determined whether or not peak power suppression is prioritized.
  • the user can preset with the remote control 44 whether to give priority to suppression of peak power or to give priority to reducing the risk of running out of hot water as processing when the power consumption instruction value is lower than the minimum required power consumption. Therefore, the determination processing in step S42 is performed according to the currently set instruction.
  • step S50 the heating capacity of the HP unit 7 in the boiling operation is set to the estimated heating capacity, which is the heating capacity that does not exceed the power consumption instruction value.
  • step S51 the user is notified of the risk of running out of hot water by displaying on the remote control 44 that the necessary amount of hot water may not be secured. After that, the processing of this time is terminated.
  • step S42 determines whether suppression of peak power is not prioritized, that is, if priority is given to reducing the risk of running out of hot water.
  • step S60 the heating capacity of the HP unit 7 in the boiling operation is set to the minimum required heating capacity.
  • step S61 the remote controller 44 notifies the user that it may not be possible to suppress peak power consumption.
  • step S62 the excess heating capacity information is transmitted to the HEMS 50.
  • FIG. After that, the current processing of the control unit 36 ends.
  • the HEMS 50 that has received the excess information adjusts the peak power to the extent possible in the entire electrical equipment.
  • the power consumption can be easily adjusted with respect to the allowable peak power by adjusting the heating capacity so as to be equal to or less than the power consumption instruction value and performing the boiling operation. be able to. Further, by transmitting the minimum required power consumption to the HEMS 50 and adjusting the power consumption with the HEMS 50, it is possible to ensure a high degree of freedom in adjusting the power consumption with respect to the allowable peak power.
  • the control unit 36 may be configured to have the function of acquiring the power consumption instruction value.
  • the configuration may be such that the power consumption instruction value can be set from the remote control 44 without using the HEMS 50 .
  • the control unit 36 receives the power consumption instruction value from the remote controller 44, and adjusts the heating capacity so that the power consumption during the boiling operation is equal to or less than the power consumption instruction value, as described with reference to FIG. adjust and drive. Thereby, peak power can be similarly suppressed.
  • HEMS energy management system

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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

Selon la présente divulgation, un dispositif d'alimentation en eau chaude, du type à stockage d'eau chaude, comprend : un moyen de chauffage qui est entraîné par l'énergie électrique, comporte un cycle de pompe à chaleur pour chauffer l'eau et possède une capacité de chauffage modifiable ; un ballon d'eau chaude ; et une unité de commande qui commande un fonctionnement d'ébullition pour accumuler, dans le ballon d'eau chaude, l'eau chaude chauffée par le moyen de chauffage. L'unité de commande est conçue pour effectuer le fonctionnement d'ébullition par réglage de la capacité de chauffage du moyen de chauffage, de telle sorte que la consommation d'énergie pendant le fonctionnement d'ébullition n'est pas supérieure à une valeur de commande de consommation d'énergie définie en tant que valeur limite supérieure de la puissance disponible pour le fonctionnement d'ébullition.
PCT/JP2021/007749 2021-03-01 2021-03-01 Dispositif d'alimentation en eau chaude du type à stockage d'eau chaude WO2022185386A1 (fr)

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JP2023503551A JPWO2022185386A1 (fr) 2021-03-01 2021-03-01
PCT/JP2021/007749 WO2022185386A1 (fr) 2021-03-01 2021-03-01 Dispositif d'alimentation en eau chaude du type à stockage d'eau chaude

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PCT/JP2021/007749 WO2022185386A1 (fr) 2021-03-01 2021-03-01 Dispositif d'alimentation en eau chaude du type à stockage d'eau chaude

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011247513A (ja) * 2010-05-27 2011-12-08 Mitsubishi Electric Corp 沸上げ制御システム、沸上げ制御方法及びプログラム
JP2015004458A (ja) * 2013-06-19 2015-01-08 三菱電機株式会社 貯湯式給湯システム
JP2017062058A (ja) * 2015-09-24 2017-03-30 三菱電機株式会社 貯湯式給湯システム
JP2020089083A (ja) * 2018-11-27 2020-06-04 三菱電機株式会社 サーバ、沸き上げ制御システム、沸き上げ制御方法、及び、プログラム
JP2021018021A (ja) * 2019-07-19 2021-02-15 三菱電機株式会社 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
JP2011247513A (ja) * 2010-05-27 2011-12-08 Mitsubishi Electric Corp 沸上げ制御システム、沸上げ制御方法及びプログラム
JP2015004458A (ja) * 2013-06-19 2015-01-08 三菱電機株式会社 貯湯式給湯システム
JP2017062058A (ja) * 2015-09-24 2017-03-30 三菱電機株式会社 貯湯式給湯システム
JP2020089083A (ja) * 2018-11-27 2020-06-04 三菱電機株式会社 サーバ、沸き上げ制御システム、沸き上げ制御方法、及び、プログラム
JP2021018021A (ja) * 2019-07-19 2021-02-15 三菱電機株式会社 貯湯式給湯装置

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