WO2021215022A1 - Hot water supply system and control method for same - Google Patents

Hot water supply system and control method for same Download PDF

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Publication number
WO2021215022A1
WO2021215022A1 PCT/JP2020/020517 JP2020020517W WO2021215022A1 WO 2021215022 A1 WO2021215022 A1 WO 2021215022A1 JP 2020020517 W JP2020020517 W JP 2020020517W WO 2021215022 A1 WO2021215022 A1 WO 2021215022A1
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Prior art keywords
electric power
hot water
heat pump
power
supply system
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PCT/JP2020/020517
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French (fr)
Japanese (ja)
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粟田隆央
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慧通信技術工業株式会社
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Publication of WO2021215022A1 publication Critical patent/WO2021215022A1/en

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

Definitions

  • the present invention relates to a hot water supply system that supplies hot water by using heating by a heat pump and a control method thereof.
  • Patent Document 1 discloses a hot water supply system that operates a heat pump using the surplus power obtained by subtracting the power used from the power generated by photovoltaic power generation. As a result, hot water can be supplied while suppressing the amount of electric power supplied from the electric power company.
  • the heat pump heats the heat medium using the heat of the outside air, it can be operated efficiently when the outside air temperature is high. Therefore, it is desirable not only to utilize the electric power obtained by photovoltaic power generation but also to realize the operation according to the outside air temperature.
  • the present invention has been made in view of such circumstances, and a main object thereof is to provide a hot water supply system capable of solving the above problems and a control method thereof.
  • the hot water supply system is obtained by heating with a heat pump driven by electric power obtained by solar power generation and electric power supplied from a commercial power source and the heat pump.
  • a hot water storage tank for storing hot water and a control device for controlling the operation of the heat pump are provided, and the control device transfers the heat pump from the commercial power source when the amount of power generated by the solar power generation is equal to or higher than a predetermined threshold.
  • the first operation mode in which the supply of electric power is cut off and the heat pump is operated by using the electric power obtained by the solar power generation is executed.
  • control device further includes a battery for storing the electric power obtained by the solar power generation, the power generation amount of the solar power generation is equal to or more than a predetermined threshold value, and the stored amount of the battery is a predetermined threshold value.
  • the supply of electric power from the commercial power source to the heat pump is cut off, the electric power obtained by the solar power generation is used, and when the electric power is insufficient, the electric power supplied from the battery is used.
  • the first operation mode for operating the heat pump may be executed.
  • control device uses the electric power obtained by the photovoltaic power generation when the outside air temperature is equal to or higher than a predetermined threshold value, and when the electric power is insufficient, the electric power supplied from the commercial power source is used. It may be used to execute a second operation mode for operating the heat pump.
  • the battery further includes a battery for storing the electric power obtained by the solar power generation
  • the control device has an outside air temperature of a predetermined threshold value or more and a stored amount of the battery is a predetermined threshold value or more.
  • the control method of the hot water supply system is a heat pump driven by electric power obtained by solar power generation and electric power supplied from a commercial power source, and a hot water storage tank for storing hot water obtained by heating by the heat pump.
  • the control method of the hot water supply system including It is characterized in that the first operation mode for operating the heat pump is executed by using the heat pump.
  • the hot water supply system further includes a battery for accumulating electric power obtained by the solar power generation, the amount of power generated by the solar power generation is equal to or higher than a predetermined threshold value, and the amount of electricity stored in the battery is predetermined.
  • a battery for accumulating electric power obtained by the solar power generation the amount of power generated by the solar power generation is equal to or higher than a predetermined threshold value, and the amount of electricity stored in the battery is predetermined.
  • the electric power obtained by the photovoltaic power generation is used, and when the electric power is insufficient, the electric power supplied from the commercial power source is used to use the heat pump.
  • the second operation mode for operating the above may be executed.
  • the hot water supply system further includes a battery for accumulating electric power obtained by the solar power generation, the outside air temperature is equal to or higher than a predetermined threshold value, and the amount of electricity stored in the battery is equal to or higher than a predetermined threshold value.
  • the electric power obtained by the solar power generation is used, when the electric power is insufficient, the electric power supplied from the battery is used, and when the electric power is further insufficient, the electric power supplied from the commercial power source is used.
  • the second operation mode for operating the heat pump may be executed.
  • FIG. The flowchart which shows the procedure of the operation mode selection process executed by the control device of the hot water supply system of Embodiment 1.
  • FIG. The figure which shows the whole structure of the hot water supply system of Embodiment 2.
  • the flowchart which shows the procedure of the operation mode selection process executed by the control device of the hot water supply system of Embodiment 2.
  • the heat pump is operated by the electric power obtained by the photovoltaic power generation in addition to the electric power supplied from the commercial power source.
  • the configuration and operation of this hot water supply system will be described.
  • FIG. 1 is a block diagram showing an overall configuration of the hot water supply system of the first embodiment.
  • the hot water supply system 1 of the present embodiment includes a control device 11, a heat pump unit 12, a hot water storage tank 13, a gas unit 14, and a temperature sensor 15.
  • the control device 11 is composed of a CPU, a memory, and the like. When the CPU executes the program stored in this memory, the operation of the hot water supply system 1 described later is realized.
  • the heat pump unit 12 is a heat pump type heat source machine that uses electricity as an energy source and absorbs heat from the outside air to heat the medium.
  • the heat pump unit 12 includes a heat pump cycle composed of a compressor (not shown), a heat exchanger, and an expansion valve, and hot water is generated by heating by the heat pump cycle.
  • the hot water generated by the heat pump unit 12 is supplied to the hot water storage tank 13.
  • the heating capacity of the heat pump unit 12 can be adjusted by changing the operating frequency of the compressor.
  • the heat pump unit 12 operates in a plurality of specific operation modes.
  • the operation mode is selected by the control device 11. The contents of each operation mode and the details of the selection process will be described later.
  • the hot water storage tank 13 stores hot water heated by the heat pump unit 12. Under the control of the control device 11, the hot water stored in the hot water storage tank 13 is supplied to a hot water supply necessary place such as a bathtub B.
  • the gas unit 14 is a combustion type heat source machine that uses gas as an energy source. According to the instruction from the control device 11, the gas unit 14 heats water supplied from a water supply facility (not shown) to generate hot water when the amount of hot water stored in the hot water storage tank 13 is insufficient, or hot water in the hot water storage tank 13. When the temperature of the hot water storage tank 13 is not sufficient, the hot water supplied from the hot water storage tank 13 is heated.
  • the temperature sensor 15 is a sensor for detecting the outside air temperature, and outputs a signal indicating the detection result.
  • the control device 11 repeatedly acquires the output signal from the temperature sensor 15 at predetermined time intervals and monitors the outside air temperature.
  • the hot water supply system 1 is provided with the temperature sensor 15, but the temperature sensor 15 may be provided outside the hot water supply system 1.
  • the hot water supply system 1 configured as described above uses power obtained from solar power generation as a power source in addition to power supplied from a commercial power source.
  • the solar panel 2 for photovoltaic power generation is composed of a plurality of solar cells and is connected to a junction box 3.
  • the junction box 3 collects the DC power generated by each solar cell of the solar panel 2 and supplies it to the power conditioner 4.
  • the power conditioner 4 converts the DC power received from the junction box 3 into AC power and supplies it to the distribution board 5.
  • this AC power will be referred to as photovoltaic power generation.
  • the distribution board 5 distributes the photovoltaic power generated from the power conditioner 4 to each place of use, and also distributes the AC power supplied from the commercial power source (hereinafter referred to as “commercial power”) to each place of use. do. A part of the electric power distributed by the distribution board 5 is supplied to the hot water supply system 1.
  • a current detection device 6 for detecting the current value output from the solar panel 2 is connected to the solar panel 2. This current value corresponds to the amount of power generated by the solar panel 2.
  • the current detection device 6 outputs a signal indicating the detection result of the current value to the control device 11 of the hot water supply system 1.
  • the control device 11 repeatedly acquires the output signal from the current detection device 6 at predetermined time intervals, and monitors the amount of power generated by the solar panel 2.
  • the hot water supply system 1 supplies hot water according to an instruction from the user.
  • the hot water used for the hot water supply is generated in advance by the operation of the heat pump unit 12, and is stored in the hot water storage tank 13.
  • three operation modes of the heat pump unit 12 are prepared, and each operation mode is selected by the control device 11.
  • the contents of each operation mode and the details of the operation mode selection process for selecting the operation mode will be described.
  • the first operation mode is a mode in which the heat pump unit 12 is operated at maximum by the photovoltaic power generation after cutting off the commercial power.
  • the maximum operation means that the compressor included in the heat pump unit 12 is operated at the maximum operating frequency. As a result, the heating capacity of the heat pump unit 12 is maximized.
  • the second operation mode is a mode in which the heat pump unit 12 is operated at maximum by using both commercial power and photovoltaic power generation. In this case, the use of photovoltaic power is prioritized, and commercial power is used only when photovoltaic power is insufficient. The content of the maximum operation is the same as in the case of the first operation mode.
  • the third operation mode is a mode in which the heat pump unit 12 is operated at a preset reserved time by using both commercial power and photovoltaic power generation.
  • this operation is referred to as a planned operation.
  • the use of photovoltaic power generation is prioritized, and commercial power is used only when the photovoltaic power generation power is insufficient.
  • FIG. 2 is a flowchart showing the procedure of the operation mode selection process executed by the control device 11 of the hot water supply system 1.
  • the control device 11 acquires the current value output from the solar panel 2 based on the signal input from the current detection device 6 (S101). Then, the control device 11 determines whether or not the current value is equal to or higher than a predetermined threshold value (S102). This threshold value is determined based on the power generation capacity of the solar panel 2, the season, and the like.
  • step S102 When it is determined in step S102 that the current value is equal to or higher than a predetermined threshold value (YES in S102), the control device 11 executes the first operation mode (S103), and ends the operation mode selection process.
  • the current value (power generation amount) output from the solar panel 2 tends to increase when the sunshine conditions are good.
  • the outside air temperature tends to be high. Therefore, when the amount of power generated by the solar panel 2 is equal to or higher than a predetermined threshold value, it is estimated that the outside air temperature is high. Since the heat pump unit 12 absorbs heat from the outside air to heat the medium, it is possible to efficiently heat the medium when the outside air temperature is high. Therefore, in the present embodiment, when the amount of power generated by the solar panel 2 is equal to or greater than a predetermined threshold value, the first operation mode for maximally operating the heat pump unit 12 is executed. As described above, in the first operating mode, commercial power is cut off and only photovoltaic power is used. Since the amount of power generated by the solar panel 2 is large, the photovoltaic power generation alone is sufficient.
  • step S102 When it is determined in step S102 that the current value is not equal to or higher than a predetermined threshold value (NO in S102), the control device 11 acquires the outside air temperature based on the signal input from the temperature sensor 15 (S104), and the outside air thereof. It is determined whether or not the temperature is equal to or higher than a predetermined threshold value (S105). This threshold value is determined based on time, season, and the like.
  • step S105 When it is determined in step S105 that the outside air temperature is equal to or higher than a predetermined threshold value (YES in S105), the control device 11 executes the second operation mode (S106), and ends the operation mode selection process.
  • the heat pump unit 12 can efficiently heat. Therefore, in the present embodiment, when the outside air temperature is equal to or higher than a predetermined threshold value, the second operation mode for maximally operating the heat pump unit 12 is executed. As described above, in the second operation mode, although commercial power and photovoltaic power generation are used together, the use of photovoltaic power generation power is prioritized. Therefore, the use of commercial power can be limited.
  • step S105 If it is determined in step S105 that the outside air temperature is not equal to or higher than a predetermined threshold value (NO in S105), the control device 11 executes the third operation mode (S107), and ends the operation mode selection process.
  • the planned operation of the heat pump unit 12 is performed. Even in this case, as in the case of the second operation mode, the photovoltaic power generation is used with priority over the commercial power, so that the use of the commercial power can be limited.
  • the operation mode of the heat pump unit 12 is selected according to the outside air temperature, efficient heating becomes possible. Further, by using the photovoltaic power generation as much as possible, the use of commercial power can be suppressed.
  • the hot water supply system of the present embodiment includes a battery that stores photovoltaic power generation, and the heat pump can be operated using the power supplied from the battery.
  • the configuration and operation of this hot water supply system will be described.
  • FIG. 3 is a block diagram showing the overall configuration of the hot water supply system according to the second embodiment.
  • the hot water supply system 10 of the present embodiment includes a battery 16 that stores surplus electric power of photovoltaic power generation.
  • the control device 11 uses the electric power stored in the battery 16 (hereinafter, referred to as “battery electric power”) to operate the heat pump unit 12 and the like. Make it work. Since the other configurations of the hot water supply system 10 are the same as those in the first embodiment, the same reference numerals are given and the description thereof will be omitted.
  • the hot water supply system 10 selects one of the three operation modes to operate the heat pump unit 12.
  • the contents of each operation mode and the details of the operation mode selection process for selecting the operation mode will be described.
  • the first operation mode is a mode in which the heat pump unit 12 is operated at maximum with the photovoltaic power generation power and the battery power after shutting off the commercial power.
  • the maximum operation means that the compressor included in the heat pump unit 12 is operated at the maximum operating frequency, whereby the heating capacity of the heat pump unit 12 is maximized.
  • priority is given to the use of photovoltaic power generation, and battery power is used when the photovoltaic power generation power is insufficient.
  • the second operation mode is a mode in which the heat pump unit 12 is operated at maximum by using commercial power, photovoltaic power generation power, and battery power in combination.
  • the use of photovoltaic power is prioritized, and battery power is used when the photovoltaic power is insufficient, and commercial power is used when the battery power is insufficient.
  • the content of the maximum operation is the same as in the case of the first operation mode.
  • the third operation mode is a mode in which the heat pump unit 12 is operated (planned operation) at a preset reserved time by using commercial power, photovoltaic power generation power, and battery power in combination.
  • the photovoltaic power generation is used with the highest priority, and the battery power and the commercial power are used in this order.
  • FIG. 4 is a flowchart showing the procedure of the operation mode selection process executed by the control device 11 of the hot water supply system 10.
  • the control device 11 acquires the current value output from the solar panel 2 based on the signal input from the current detection device 6 (S201), and further acquires the stored amount of the battery 16 (S202).
  • the control device 11 determines whether or not each of the current value and the stored amount is equal to or higher than a predetermined threshold value (S203).
  • the threshold value for the current value is determined based on the power generation capacity and season of the solar panel 2, and the threshold value for the amount of stored electricity is determined based on the capacity of the battery 16 and the like.
  • step S203 When it is determined in step S203 that both the current value and the stored amount are equal to or higher than a predetermined threshold value (YES in S203), the control device 11 executes the first operation mode (S204), and ends the operation mode selection process. do.
  • the photovoltaic power generation power is preferentially used, and when it is insufficient, the battery power is used. Since the amount of power generated by the solar panel 2 is large, the photovoltaic power generation can be sufficiently used, and if there is a shortage, the battery power can be used. As a result, the heat pump unit 12 can be operated efficiently while suppressing the use of commercial power.
  • step S203 when it is determined in step S203 that at least one of the current value and the stored amount is not equal to or higher than a predetermined threshold value (NO in S203), the control device 11 determines the outside air temperature based on the signal input from the temperature sensor 15. It is acquired (S205), and it is determined whether or not the outside air temperature and the amount of electricity stored in the battery 16 are equal to or higher than a predetermined threshold value (S206).
  • the threshold value for the outside air temperature is determined based on time, season, and the like.
  • the threshold value for the amount of stored electricity is the same as that of step S203.
  • step S206 When it is determined in step S206 that both the outside air temperature and the amount of stored electricity are equal to or higher than a predetermined threshold value (YES in S206), the control device 11 executes the second operation mode (S207) and ends the operation mode selection process. do.
  • the photovoltaic power generation power and the battery power are preferentially used, the use of commercial power can be limited as in the case of the first embodiment, and then the heat pump unit 12 Can be operated efficiently.
  • step S206 If it is determined in step S206 that the outside air temperature is not equal to or higher than a predetermined threshold value (NO in S206), the control device 11 executes the third operation mode (S208), and ends the operation mode selection process.
  • the planned operation of the heat pump unit 12 is performed. Even in this case, as in the case of the second operation mode, the photovoltaic power generation power and the battery power are used in preference to the commercial power, so that the use of the commercial power can be limited.

Abstract

A hot water supply system (1) is provided with: a heat pump unit (12) driven by power obtained from a solar panel (2) and power supplied from a commercial power source; a hot water storage tank (13) for storing hot water obtained by heating by means of the heat pump unit (12); and a control device (11) for controlling the operation of the heat pump unit (12). When the amount of power generated by the solar panel (2) is greater than or equal to a prescribed threshold value, the control device (11) executes a first operation mode in which the supply of power to the heat pump unit (12) from a commercial power source is shut off, and power obtained from the solar panel (2) is used to operate the heat pump unit (12).

Description

給湯システム及びその制御方法Hot water supply system and its control method
　本発明は、ヒートポンプによる加熱を利用して給湯を行う給湯システム及びその制御方法に関する。 The present invention relates to a hot water supply system that supplies hot water by using heating by a heat pump and a control method thereof.
　近年、ヒートポンプによる加熱を利用して給湯を行う給湯システムとして、太陽光発電により得られた電力を用いてヒートポンプを駆動させるものが提案されている。例えば、特許文献１には、太陽光発電による発電電力から使用電力を除いた余剰電力が存在する場合に、その余剰電力を用いてヒートポンプを運転させる給湯システムが開示されている。これにより、電力会社から供給される電力の使用量を抑制しながら給湯を行うことができる。 In recent years, as a hot water supply system that supplies hot water by using heating by a heat pump, a system that drives a heat pump using electric power obtained by photovoltaic power generation has been proposed. For example, Patent Document 1 discloses a hot water supply system that operates a heat pump using the surplus power obtained by subtracting the power used from the power generated by photovoltaic power generation. As a result, hot water can be supplied while suppressing the amount of electric power supplied from the electric power company.
特開２０１７－３６８４２号公報Japanese Unexamined Patent Publication No. 2017-36842
　ところで、ヒートポンプは外気の熱を用いて熱媒を加熱するため、外気温度が高い場合に効率良く運転することができる。そのため、太陽光発電により得られた電力を利用するだけでなく、外気温度に応じた運転を実現することが望ましい。 By the way, since the heat pump heats the heat medium using the heat of the outside air, it can be operated efficiently when the outside air temperature is high. Therefore, it is desirable not only to utilize the electric power obtained by photovoltaic power generation but also to realize the operation according to the outside air temperature.
　本発明は斯かる事情に鑑みてなされたものであり、その主たる目的は、上記課題を解決することができる給湯システム及びその制御方法を提供することにある。 The present invention has been made in view of such circumstances, and a main object thereof is to provide a hot water supply system capable of solving the above problems and a control method thereof.
　上記の課題を解決するために、本発明の一の態様の給湯システムは、太陽光発電により得られる電力及び商用電源から供給される電力により駆動するヒートポンプと、前記ヒートポンプにより加熱して得られた湯水を貯湯する貯湯タンクと、前記ヒートポンプの動作を制御する制御装置とを備え、前記制御装置は、前記太陽光発電の発電量が所定の閾値以上である場合、前記商用電源から前記ヒートポンプへの電力の供給を遮断し、前記太陽光発電により得られる電力を用いて前記ヒートポンプを動作させる第１動作モードを実行する。 In order to solve the above problems, the hot water supply system according to one aspect of the present invention is obtained by heating with a heat pump driven by electric power obtained by solar power generation and electric power supplied from a commercial power source and the heat pump. A hot water storage tank for storing hot water and a control device for controlling the operation of the heat pump are provided, and the control device transfers the heat pump from the commercial power source when the amount of power generated by the solar power generation is equal to or higher than a predetermined threshold. The first operation mode in which the supply of electric power is cut off and the heat pump is operated by using the electric power obtained by the solar power generation is executed.
　前記態様において、前記太陽光発電により得られる電力を蓄積するバッテリーをさらに備え、前記制御装置は、前記太陽光発電の発電量が所定の閾値以上であり、且つ前記バッテリーの蓄電量が所定の閾値以上である場合、前記商用電源から前記ヒートポンプへの電力の供給を遮断し、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記バッテリーから供給される電力を用いて、前記ヒートポンプを動作させる前記第１動作モードを実行するようにしてもよい。 In the above aspect, the control device further includes a battery for storing the electric power obtained by the solar power generation, the power generation amount of the solar power generation is equal to or more than a predetermined threshold value, and the stored amount of the battery is a predetermined threshold value. In the above case, the supply of electric power from the commercial power source to the heat pump is cut off, the electric power obtained by the solar power generation is used, and when the electric power is insufficient, the electric power supplied from the battery is used. The first operation mode for operating the heat pump may be executed.
　また、前記態様において、前記制御装置は、外気温度が所定の閾値以上である場合、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記商用電源から供給される電力を用いて、前記ヒートポンプを動作させる第２動作モードを実行するようにしてもよい。 Further, in the above aspect, the control device uses the electric power obtained by the photovoltaic power generation when the outside air temperature is equal to or higher than a predetermined threshold value, and when the electric power is insufficient, the electric power supplied from the commercial power source is used. It may be used to execute a second operation mode for operating the heat pump.
　また、前記態様において、前記太陽光発電により得られる電力を蓄積するバッテリーをさらに備え、前記制御装置は、外気温度が所定の閾値以上であり、且つ前記バッテリーの蓄電量が所定の閾値以上である場合、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記バッテリーから供給される電力を用いて、さらに不足するときは前記商用電源から供給される電力を用いて、前記ヒートポンプを動作させる前記第２動作モードを実行するようにしてもよい。 Further, in the above aspect, the battery further includes a battery for storing the electric power obtained by the solar power generation, and the control device has an outside air temperature of a predetermined threshold value or more and a stored amount of the battery is a predetermined threshold value or more. In this case, using the electric power obtained by the solar power generation, when the electric power is insufficient, the electric power supplied from the battery is used, and when the electric power is further insufficient, the electric power supplied from the commercial power source is used. The second operation mode for operating the heat pump may be executed.
　本発明の一の態様の給湯システムの制御方法は、太陽光発電により得られる電力及び商用電源から供給される電力により駆動するヒートポンプと、前記ヒートポンプにより加熱して得られた湯水を貯湯する貯湯タンクとを備える給湯システムの制御方法において、前記太陽光発電の発電量が所定の閾値以上である場合、前記商用電源から前記ヒートポンプへの電力の供給を遮断し、前記太陽光発電により得られる電力を用いて前記ヒートポンプを動作させる第１動作モードを実行することを特徴とする。 The control method of the hot water supply system according to one aspect of the present invention is a heat pump driven by electric power obtained by solar power generation and electric power supplied from a commercial power source, and a hot water storage tank for storing hot water obtained by heating by the heat pump. In the control method of the hot water supply system including It is characterized in that the first operation mode for operating the heat pump is executed by using the heat pump.
　前記態様において、前記給湯システムは、前記太陽光発電により得られる電力を蓄積するバッテリーをさらに備えており、前記太陽光発電の発電量が所定の閾値以上であり、且つ前記バッテリーの蓄電量が所定の閾値以上である場合、前記商用電源から前記ヒートポンプへの電力の供給を遮断し、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記バッテリーから供給される電力を用いて、前記ヒートポンプを動作させる前記第１動作モードを実行するようにしてもよい。 In the above aspect, the hot water supply system further includes a battery for accumulating electric power obtained by the solar power generation, the amount of power generated by the solar power generation is equal to or higher than a predetermined threshold value, and the amount of electricity stored in the battery is predetermined. When it is equal to or more than the threshold value of, the supply of electric power from the commercial power source to the heat pump is cut off, the electric power obtained by the solar power generation is used, and when the electric power is insufficient, the electric power supplied from the battery is used. The first operation mode for operating the heat pump may be executed.
　また、前記態様において、外気温度が所定の閾値以上である場合、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記商用電源から供給される電力を用いて、前記ヒートポンプを動作させる第２動作モードを実行するようにしてもよい。 Further, in the above embodiment, when the outside air temperature is equal to or higher than a predetermined threshold value, the electric power obtained by the photovoltaic power generation is used, and when the electric power is insufficient, the electric power supplied from the commercial power source is used to use the heat pump. The second operation mode for operating the above may be executed.
　また、前記態様において、前記給湯システムは、前記太陽光発電により得られる電力を蓄積するバッテリーをさらに備えており、外気温度が所定の閾値以上であり、且つ前記バッテリーの蓄電量が所定の閾値以上である場合、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記バッテリーから供給される電力を用いて、さらに不足するときは前記商用電源から供給される電力を用いて、前記ヒートポンプを動作させる前記第２動作モードを実行するようにしてもよい。 Further, in the above aspect, the hot water supply system further includes a battery for accumulating electric power obtained by the solar power generation, the outside air temperature is equal to or higher than a predetermined threshold value, and the amount of electricity stored in the battery is equal to or higher than a predetermined threshold value. In the case of, the electric power obtained by the solar power generation is used, when the electric power is insufficient, the electric power supplied from the battery is used, and when the electric power is further insufficient, the electric power supplied from the commercial power source is used. , The second operation mode for operating the heat pump may be executed.
　本発明によれば、電力会社から供給される電力の使用量を抑制した上で、ヒートポンプを効率良く運転させることが可能になる。 According to the present invention, it is possible to efficiently operate the heat pump while suppressing the amount of electric power used from the electric power company.
実施の形態１の給湯システムの全体構成を示す図。The figure which shows the whole structure of the hot water supply system of Embodiment 1. FIG. 実施の形態１の給湯システムの制御装置によって実行される動作モード選択処理の手順を示すフローチャート。The flowchart which shows the procedure of the operation mode selection process executed by the control device of the hot water supply system of Embodiment 1. FIG. 実施の形態２の給湯システムの全体構成を示す図。The figure which shows the whole structure of the hot water supply system of Embodiment 2. 実施の形態２の給湯システムの制御装置によって実行される動作モード選択処理の手順を示すフローチャート。The flowchart which shows the procedure of the operation mode selection process executed by the control device of the hot water supply system of Embodiment 2.
　以下、本発明の好ましい実施の形態について、図面を参照しながら説明する。なお、以下に示す各実施の形態は、本発明の技術的思想を具体化するための方法及び装置を例示するものであって、本発明の技術的思想は下記のものに限定されるわけではない。本発明の技術的思想は、請求の範囲に記載された技術的範囲内において種々の変更を加えることができる。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. It should be noted that each of the embodiments shown below exemplifies a method and an apparatus for embodying the technical idea of the present invention, and the technical idea of the present invention is not limited to the following. No. The technical idea of the present invention may be modified in various ways within the scope of the claims.
　（実施の形態１）
　本実施の形態の給湯システムは、商用電源から供給される電力に加えて太陽光発電により得られる電力によってヒートポンプを動作させる。以下、この給湯システムの構成及び動作について説明する。 (Embodiment 1)
In the hot water supply system of the present embodiment, the heat pump is operated by the electric power obtained by the photovoltaic power generation in addition to the electric power supplied from the commercial power source. Hereinafter, the configuration and operation of this hot water supply system will be described.
　［給湯システム１の構成］
　図１は、実施の形態１の給湯システムの全体構成を示すブロック図である。本実施の形態の給湯システム１は、制御装置１１と、ヒートポンプユニット１２と、貯湯タンク１３と、ガスユニット１４と、温度センサ１５とを備えている。 [Configuration of hot water supply system 1]
FIG. 1 is a block diagram showing an overall configuration of the hot water supply system of the first embodiment. The hot water supply system 1 of the present embodiment includes a control device 11, a heat pump unit 12, a hot water storage tank 13, a gas unit 14, and a temperature sensor 15.
　制御装置１１は、ＣＰＵ及びメモリなどで構成される。このメモリに記憶されているプラグラムをＣＰＵが実行することにより、後述する給湯システム１の動作が実現される。 The control device 11 is composed of a CPU, a memory, and the like. When the CPU executes the program stored in this memory, the operation of the hot water supply system 1 described later is realized.
　ヒートポンプユニット１２は、電気をエネルギー源とし、外気から吸熱して媒体を加熱するヒートポンプ方式の熱源機である。ヒートポンプユニット１２は、図示しない圧縮機、熱交換器、及び膨張弁から構成されるヒートポンプサイクルを備えており、このヒートポンプサイクルによる加熱によって湯水が生成される。ヒートポンプユニット１２によって生成された温水は貯湯タンク１３に供給される。なお、ヒートポンプユニット１２の加熱能力は、圧縮機の運転周波数を変えることによって調整することができる。 The heat pump unit 12 is a heat pump type heat source machine that uses electricity as an energy source and absorbs heat from the outside air to heat the medium. The heat pump unit 12 includes a heat pump cycle composed of a compressor (not shown), a heat exchanger, and an expansion valve, and hot water is generated by heating by the heat pump cycle. The hot water generated by the heat pump unit 12 is supplied to the hot water storage tank 13. The heating capacity of the heat pump unit 12 can be adjusted by changing the operating frequency of the compressor.
　ヒートポンプユニット１２は、特定の複数の動作モードで動作する。動作モードの選択は、制御装置１１によって行われる。各動作モードの内容及びその選択処理の詳細については後述する。 The heat pump unit 12 operates in a plurality of specific operation modes. The operation mode is selected by the control device 11. The contents of each operation mode and the details of the selection process will be described later.
　貯湯タンク１３は、ヒートポンプユニット１２によって加熱された温水を貯留する。制御装置１１による制御により、貯湯タンク１３に貯湯された温水は、浴槽Ｂ等の給湯必要箇所に給湯される。 The hot water storage tank 13 stores hot water heated by the heat pump unit 12. Under the control of the control device 11, the hot water stored in the hot water storage tank 13 is supplied to a hot water supply necessary place such as a bathtub B.
　ガスユニット１４は、ガスをエネルギー源とする燃焼式の熱源機である。ガスユニット１４は、制御装置１１からの指示にしたがって、貯湯タンク１３の貯湯量では不足する場合に図示しない給水設備から供給される水を加熱して湯水を生成したり、貯湯タンク１３内の湯水の温度が十分ではない場合に貯湯タンク１３から供給される湯水を加熱したりする。 The gas unit 14 is a combustion type heat source machine that uses gas as an energy source. According to the instruction from the control device 11, the gas unit 14 heats water supplied from a water supply facility (not shown) to generate hot water when the amount of hot water stored in the hot water storage tank 13 is insufficient, or hot water in the hot water storage tank 13. When the temperature of the hot water storage tank 13 is not sufficient, the hot water supplied from the hot water storage tank 13 is heated.
　温度センサ１５は、外気温度を検出するためのセンサであり、その検出結果を示す信号を出力する。制御装置１１は、温度センサ１５からの出力信号を所定の時間間隔で繰り返し取得し、外気温度を監視する。なお、本実施の形態では給湯システム１が温度センサ１５を備えているが、温度センサ１５が給湯システム１の外部に設けられていてもよい。 The temperature sensor 15 is a sensor for detecting the outside air temperature, and outputs a signal indicating the detection result. The control device 11 repeatedly acquires the output signal from the temperature sensor 15 at predetermined time intervals and monitors the outside air temperature. In the present embodiment, the hot water supply system 1 is provided with the temperature sensor 15, but the temperature sensor 15 may be provided outside the hot water supply system 1.
　上記のように構成された給湯システム１は、商用電源から供給される電力の他、太陽光発電により得られる電力を動力源とする。その太陽光発電のための太陽光パネル２は、複数の太陽電池により構成されており、接続箱３に接続されている。接続箱３は、太陽光パネル２の各太陽電池によって発電された直流電力を集めて、パワーコンディショナ４に供給する。 The hot water supply system 1 configured as described above uses power obtained from solar power generation as a power source in addition to power supplied from a commercial power source. The solar panel 2 for photovoltaic power generation is composed of a plurality of solar cells and is connected to a junction box 3. The junction box 3 collects the DC power generated by each solar cell of the solar panel 2 and supplies it to the power conditioner 4.
　パワーコンディショナ４は、接続箱３から受けた直流電力を交流電力に変換して分電盤５に供給する。以下、この交流電力を太陽光発電電力と称する。 The power conditioner 4 converts the DC power received from the junction box 3 into AC power and supplies it to the distribution board 5. Hereinafter, this AC power will be referred to as photovoltaic power generation.
　分電盤５は、パワーコンディショナ４から入力された太陽光発電電力を各使用箇所に分配するとともに、商用電源から供給される交流電力（以下、「商用電力」という）も各使用箇所に分配する。分電盤５によって分配される電力の一部は、給湯システム１に供給される。 The distribution board 5 distributes the photovoltaic power generated from the power conditioner 4 to each place of use, and also distributes the AC power supplied from the commercial power source (hereinafter referred to as “commercial power”) to each place of use. do. A part of the electric power distributed by the distribution board 5 is supplied to the hot water supply system 1.
　また、太陽光パネル２には、太陽光パネル２から出力される電流値を検出する電流検出装置６が接続されている。この電流値は、太陽光パネル２の発電量に相当する。電流検出装置６は、電流値の検出結果を示す信号を給湯システム１の制御装置１１に対して出力する。制御装置１１は、電流検出装置６からの出力信号を所定の時間間隔で繰り返し取得し、太陽光パネル２の発電量を監視する。 Further, a current detection device 6 for detecting the current value output from the solar panel 2 is connected to the solar panel 2. This current value corresponds to the amount of power generated by the solar panel 2. The current detection device 6 outputs a signal indicating the detection result of the current value to the control device 11 of the hot water supply system 1. The control device 11 repeatedly acquires the output signal from the current detection device 6 at predetermined time intervals, and monitors the amount of power generated by the solar panel 2.
　［給湯システム１の動作］
　次に、給湯システム１の動作について、フローチャートを参照しながら説明する。給湯システム１は、ユーザからの指示に応じて給湯を行う。その給湯に用いられる湯水は、ヒートポンプユニット１２の動作により事前に生成され、貯湯タンク１３に貯湯されている。本実施の形態では、このヒートポンプユニット１２の動作モードが３つ用意されており、制御装置１１によって各動作モードが選択される。以下、各動作モードの内容、及び動作モードの選択を行うための動作モード選択処理の詳細について説明する。 [Operation of hot water supply system 1]
Next, the operation of the hot water supply system 1 will be described with reference to the flowchart. The hot water supply system 1 supplies hot water according to an instruction from the user. The hot water used for the hot water supply is generated in advance by the operation of the heat pump unit 12, and is stored in the hot water storage tank 13. In the present embodiment, three operation modes of the heat pump unit 12 are prepared, and each operation mode is selected by the control device 11. Hereinafter, the contents of each operation mode and the details of the operation mode selection process for selecting the operation mode will be described.
　本実施の形態では、以下の３つの動作モードが用意されている。
　（１）第１動作モード
　第１動作モードは、商用電力を遮断した上で、太陽光発電電力でヒートポンプユニット１２を最大運転させるモードである。ここで、最大運転とは、ヒートポンプユニット１２が備える圧縮機を最大運転周波数で運転させることを示している。これにより、ヒートポンプユニット１２の加熱能力が最大となる。 In this embodiment, the following three operation modes are prepared.
(1) First Operation Mode The first operation mode is a mode in which the heat pump unit 12 is operated at maximum by the photovoltaic power generation after cutting off the commercial power. Here, the maximum operation means that the compressor included in the heat pump unit 12 is operated at the maximum operating frequency. As a result, the heating capacity of the heat pump unit 12 is maximized.
　（２）第２動作モード
　第２動作モードは、商用電力及び太陽光発電電力を併用してヒートポンプユニット１２を最大運転させるモードである。この場合、太陽光発電電力の使用が優先され、太陽光発電電力では不足する場合にのみ商用電力が使用される。なお、最大運転の内容は第１動作モードの場合と同様である。 (2) Second Operation Mode The second operation mode is a mode in which the heat pump unit 12 is operated at maximum by using both commercial power and photovoltaic power generation. In this case, the use of photovoltaic power is prioritized, and commercial power is used only when photovoltaic power is insufficient. The content of the maximum operation is the same as in the case of the first operation mode.
　（３）第３動作モード
　第３動作モードは、商用電力及び太陽光発電電力を併用して、予め設定された予約時間にヒートポンプユニット１２を運転させるモードである。以下、この運転を計画運転と称する。この第３動作モードにおいても、第２動作モードの場合と同様に、太陽光発電電力の使用が優先され、太陽光発電電力では不足する場合にのみ商用電力が使用される。 (3) Third Operation Mode The third operation mode is a mode in which the heat pump unit 12 is operated at a preset reserved time by using both commercial power and photovoltaic power generation. Hereinafter, this operation is referred to as a planned operation. In this third operation mode as well, as in the case of the second operation mode, the use of photovoltaic power generation is prioritized, and commercial power is used only when the photovoltaic power generation power is insufficient.
　図２は、給湯システム１の制御装置１１によって実行される動作モード選択処理の手順を示すフローチャートである。制御装置１１はまず、電流検出装置６から入力された信号に基づいて、太陽光パネル２から出力される電流値を取得する（Ｓ１０１）。そして、制御装置１１は、その電流値が所定の閾値以上であるか否かを判定する（Ｓ１０２）。なお、この閾値は、太陽光パネル２の発電能力及び季節などに基づいて決定される。 FIG. 2 is a flowchart showing the procedure of the operation mode selection process executed by the control device 11 of the hot water supply system 1. First, the control device 11 acquires the current value output from the solar panel 2 based on the signal input from the current detection device 6 (S101). Then, the control device 11 determines whether or not the current value is equal to or higher than a predetermined threshold value (S102). This threshold value is determined based on the power generation capacity of the solar panel 2, the season, and the like.
　ステップＳ１０２において電流値が所定の閾値以上であると判定した場合（Ｓ１０２でＹＥＳ）、制御装置１１は、第１動作モードを実行し（Ｓ１０３）、動作モード選択処理を終了する。 When it is determined in step S102 that the current value is equal to or higher than a predetermined threshold value (YES in S102), the control device 11 executes the first operation mode (S103), and ends the operation mode selection process.
　太陽光パネル２から出力される電流値（発電量）は、日照条件が良い場合に高くなる傾向にある。また、日照条件が良い場合は外気温度も高くなる傾向にある。そのため、太陽光パネル２の発電量が所定の閾値以上となっている場合、外気温度が高いことが推定される。ヒートポンプユニット１２は、外気から吸熱して媒体を加熱するため、外気温度が高いと効率良く加熱を行うことができる。そこで、本実施の形態では、太陽光パネル２の発電量が所定の閾値以上である場合、ヒートポンプユニット１２を最大運転させる第１動作モードが実行される。上述したとおり、第１動作モードでは、商用電力が遮断され、太陽光発電電力のみが使用される。太陽光パネル２の発電量が大きい状況であるため、太陽光発電電力のみで十分対応することができる。 The current value (power generation amount) output from the solar panel 2 tends to increase when the sunshine conditions are good. In addition, when the sunshine conditions are good, the outside air temperature tends to be high. Therefore, when the amount of power generated by the solar panel 2 is equal to or higher than a predetermined threshold value, it is estimated that the outside air temperature is high. Since the heat pump unit 12 absorbs heat from the outside air to heat the medium, it is possible to efficiently heat the medium when the outside air temperature is high. Therefore, in the present embodiment, when the amount of power generated by the solar panel 2 is equal to or greater than a predetermined threshold value, the first operation mode for maximally operating the heat pump unit 12 is executed. As described above, in the first operating mode, commercial power is cut off and only photovoltaic power is used. Since the amount of power generated by the solar panel 2 is large, the photovoltaic power generation alone is sufficient.
　ステップＳ１０２において電流値が所定の閾値以上ではないと判定した場合（Ｓ１０２でＮＯ）、制御装置１１は、温度センサ１５から入力された信号に基づいて、外気温度を取得し（Ｓ１０４）、その外気温度が所定の閾値以上であるか否かを判定する（Ｓ１０５）。なお、この閾値は、時間及び季節などに基づいて決定される。 When it is determined in step S102 that the current value is not equal to or higher than a predetermined threshold value (NO in S102), the control device 11 acquires the outside air temperature based on the signal input from the temperature sensor 15 (S104), and the outside air thereof. It is determined whether or not the temperature is equal to or higher than a predetermined threshold value (S105). This threshold value is determined based on time, season, and the like.
　ステップＳ１０５において外気温度が所定の閾値以上であると判定した場合（Ｓ１０５でＹＥＳ）、制御装置１１は、第２動作モードを実行し（Ｓ１０６）、動作モード選択処理を終了する。 When it is determined in step S105 that the outside air temperature is equal to or higher than a predetermined threshold value (YES in S105), the control device 11 executes the second operation mode (S106), and ends the operation mode selection process.
　上述したとおり、外気温度が高い場合、ヒートポンプユニット１２は効率良く加熱を行うことができる。そこで、本実施の形態では、外気温度が所定の閾値以上である場合、ヒートポンプユニット１２を最大運転させる第２動作モードが実行される。上述したとおり、第２動作モードでは、商用電力及び太陽光発電電力が併用されるものの、太陽光発電電力の使用が優先される。そのため、商用電力の使用を限定的なものにすることができる。 As described above, when the outside air temperature is high, the heat pump unit 12 can efficiently heat. Therefore, in the present embodiment, when the outside air temperature is equal to or higher than a predetermined threshold value, the second operation mode for maximally operating the heat pump unit 12 is executed. As described above, in the second operation mode, although commercial power and photovoltaic power generation are used together, the use of photovoltaic power generation power is prioritized. Therefore, the use of commercial power can be limited.
　また、ステップＳ１０５において外気温度が所定の閾値以上ではないと判定した場合（Ｓ１０５でＮＯ）、制御装置１１は、第３動作モードを実行し（Ｓ１０７）、動作モード選択処理を終了する。 If it is determined in step S105 that the outside air temperature is not equal to or higher than a predetermined threshold value (NO in S105), the control device 11 executes the third operation mode (S107), and ends the operation mode selection process.
　第３動作モードでは、ヒートポンプユニット１２の計画運転が行われる。この場合でも、第２動作モードの場合と同様に、太陽光発電電力が商用電力よりも優先して使用されるため、商用電力の使用を限定的なものにすることができる。 In the third operation mode, the planned operation of the heat pump unit 12 is performed. Even in this case, as in the case of the second operation mode, the photovoltaic power generation is used with priority over the commercial power, so that the use of the commercial power can be limited.
　上記のとおり、本実施の形態では、外気温度に応じてヒートポンプユニット１２の動作モードが選択されるため、効率良く加熱することが可能になる。また、太陽光発電電力を可能な限り使用することによって、商用電力の使用を抑制することができる。 As described above, in the present embodiment, since the operation mode of the heat pump unit 12 is selected according to the outside air temperature, efficient heating becomes possible. Further, by using the photovoltaic power generation as much as possible, the use of commercial power can be suppressed.
　（実施の形態２）
　本実施の形態の給湯システムは、太陽光発電電力を蓄積するバッテリーを備えており、そのバッテリーから供給される電力を用いてヒートポンプを動作させることができる。以下、この給湯システムの構成及び動作について説明する。 (Embodiment 2)
The hot water supply system of the present embodiment includes a battery that stores photovoltaic power generation, and the heat pump can be operated using the power supplied from the battery. Hereinafter, the configuration and operation of this hot water supply system will be described.
　［給湯システム１０の構成］
　図３は、実施の形態２の給湯システムの全体構成を示すブロック図である。本実施の形態の給湯システム１０は、太陽光発電電力の余剰電力を蓄積するバッテリー１６を備えている。制御装置１１は、夜間及び雨天時など太陽光パネル２の発電量が十分ではないときに、バッテリー１６に蓄えられている電力（以下、「バッテリー電力」という）を使用してヒートポンプユニット１２などを動作させる。なお、給湯システム１０のその他の構成については、実施の形態１の場合と同様であるため、同一符号を付して説明を省略する。 [Configuration of hot water supply system 10]
FIG. 3 is a block diagram showing the overall configuration of the hot water supply system according to the second embodiment. The hot water supply system 10 of the present embodiment includes a battery 16 that stores surplus electric power of photovoltaic power generation. When the amount of power generated by the solar panel 2 is insufficient, such as at night or in the rain, the control device 11 uses the electric power stored in the battery 16 (hereinafter, referred to as “battery electric power”) to operate the heat pump unit 12 and the like. Make it work. Since the other configurations of the hot water supply system 10 are the same as those in the first embodiment, the same reference numerals are given and the description thereof will be omitted.
　［給湯システム１０の動作］
　次に、給湯システム１０の動作について、フローチャートを参照しながら説明する。給湯システム１０は、実施の形態１の場合と同様に、３つの動作モードの中から１つを選択し、ヒートポンプユニット１２を作動させる。以下、各動作モードの内容、及び動作モードの選択を行うための動作モード選択処理の詳細について説明する。 [Operation of hot water supply system 10]
Next, the operation of the hot water supply system 10 will be described with reference to the flowchart. As in the case of the first embodiment, the hot water supply system 10 selects one of the three operation modes to operate the heat pump unit 12. Hereinafter, the contents of each operation mode and the details of the operation mode selection process for selecting the operation mode will be described.
　本実施の形態では、以下の３つの動作モードが用意されている。
　（１）第１動作モード
　第１動作モードは、商用電力を遮断した上で、太陽光発電電力及びバッテリー電力でヒートポンプユニット１２を最大運転させるモードである。ここで、最大運転とは、ヒートポンプユニット１２が備える圧縮機を最大運転周波数で運転させることを示しており、これによりヒートポンプユニット１２の加熱能力が最大となる。第１動作モードにおいては、太陽光発電電力の使用が優先され、太陽光発電電力では不足する場合にバッテリー電力が使用される。 In this embodiment, the following three operation modes are prepared.
(1) First Operation Mode The first operation mode is a mode in which the heat pump unit 12 is operated at maximum with the photovoltaic power generation power and the battery power after shutting off the commercial power. Here, the maximum operation means that the compressor included in the heat pump unit 12 is operated at the maximum operating frequency, whereby the heating capacity of the heat pump unit 12 is maximized. In the first operation mode, priority is given to the use of photovoltaic power generation, and battery power is used when the photovoltaic power generation power is insufficient.
　（２）第２動作モード
　第２動作モードは、商用電力、太陽光発電電力及びバッテリー電力を併用してヒートポンプユニット１２を最大運転させるモードである。第２動作モードにおいては、太陽光発電電力の使用が優先され、太陽光発電電力では不足する場合にバッテリー電力が、さらにバッテリー電力では不足する場合に商用電力が、それぞれ使用される。なお、最大運転の内容は第１動作モードの場合と同様である。 (2) Second Operation Mode The second operation mode is a mode in which the heat pump unit 12 is operated at maximum by using commercial power, photovoltaic power generation power, and battery power in combination. In the second operation mode, the use of photovoltaic power is prioritized, and battery power is used when the photovoltaic power is insufficient, and commercial power is used when the battery power is insufficient. The content of the maximum operation is the same as in the case of the first operation mode.
　（３）第３動作モード
　第３動作モードは、商用電力、太陽光発電電力及びバッテリー電力を併用して、予め設定された予約時間にヒートポンプユニット１２を運転（計画運転）させるモードである。この第３動作モードにおいても、第２動作モードの場合と同様に、太陽光発電電力が最優先で使用され、バッテリー電力及び商用電力がこの順に使用される。 (3) Third Operation Mode The third operation mode is a mode in which the heat pump unit 12 is operated (planned operation) at a preset reserved time by using commercial power, photovoltaic power generation power, and battery power in combination. In this third operation mode as well, as in the case of the second operation mode, the photovoltaic power generation is used with the highest priority, and the battery power and the commercial power are used in this order.
　図４は、給湯システム１０の制御装置１１によって実行される動作モード選択処理の手順を示すフローチャートである。制御装置１１は、電流検出装置６から入力された信号に基づいて、太陽光パネル２から出力される電流値を取得し（Ｓ２０１）、さらに、バッテリー１６の蓄電量を取得する（Ｓ２０２）。 FIG. 4 is a flowchart showing the procedure of the operation mode selection process executed by the control device 11 of the hot water supply system 10. The control device 11 acquires the current value output from the solar panel 2 based on the signal input from the current detection device 6 (S201), and further acquires the stored amount of the battery 16 (S202).
　次に、制御装置１１は、電流値及び蓄電量のそれぞれが所定の閾値以上であるか否かを判定する（Ｓ２０３）。なお、電流値に対する閾値は太陽光パネル２の発電能力及び季節などに基づいて、蓄電量に対する閾値はバッテリー１６の容量などに基づいて、それぞれ決定される。 Next, the control device 11 determines whether or not each of the current value and the stored amount is equal to or higher than a predetermined threshold value (S203). The threshold value for the current value is determined based on the power generation capacity and season of the solar panel 2, and the threshold value for the amount of stored electricity is determined based on the capacity of the battery 16 and the like.
　ステップＳ２０３において電流値及び蓄電量の何れもが所定の閾値以上であると判定した場合（Ｓ２０３でＹＥＳ）、制御装置１１は、第１動作モードを実行し（Ｓ２０４）、動作モード選択処理を終了する。 When it is determined in step S203 that both the current value and the stored amount are equal to or higher than a predetermined threshold value (YES in S203), the control device 11 executes the first operation mode (S204), and ends the operation mode selection process. do.
　実施の形態１の場合と同様、第１動作モードでは商用電力が遮断された上で、太陽光発電電力が優先的に使用され、それで不足する場合にバッテリー電力が使用される。太陽光パネル２の発電量が大きい状況であるため、太陽光発電電力で十分対応可能であり、不足する場合はバッテリー電力で対応することができる。これにより、商用電力の使用を抑制した上で、ヒートポンプユニット１２を効率良く動作させることができる。 As in the case of the first embodiment, in the first operation mode, after the commercial power is cut off, the photovoltaic power generation power is preferentially used, and when it is insufficient, the battery power is used. Since the amount of power generated by the solar panel 2 is large, the photovoltaic power generation can be sufficiently used, and if there is a shortage, the battery power can be used. As a result, the heat pump unit 12 can be operated efficiently while suppressing the use of commercial power.
　また、ステップＳ２０３において電流値及び蓄電量の少なくとも一方が所定の閾値以上ではないと判定した場合（Ｓ２０３でＮＯ）、制御装置１１は、温度センサ１５から入力された信号に基づいて、外気温度を取得し（Ｓ２０５）、その外気温度及びバッテリー１６の蓄電量が所定の閾値以上であるか否かを判定する（Ｓ２０６）。なお、外気温度に対する閾値は、時間及び季節などに基づいて決定される。蓄電量に対する閾値はステップＳ２０３のものと同じである。 Further, when it is determined in step S203 that at least one of the current value and the stored amount is not equal to or higher than a predetermined threshold value (NO in S203), the control device 11 determines the outside air temperature based on the signal input from the temperature sensor 15. It is acquired (S205), and it is determined whether or not the outside air temperature and the amount of electricity stored in the battery 16 are equal to or higher than a predetermined threshold value (S206). The threshold value for the outside air temperature is determined based on time, season, and the like. The threshold value for the amount of stored electricity is the same as that of step S203.
　ステップＳ２０６において外気温度及び蓄電量の何れもが所定の閾値以上であると判定した場合（Ｓ２０６でＹＥＳ）、制御装置１１は、第２動作モードを実行し（Ｓ２０７）、動作モード選択処理を終了する。 When it is determined in step S206 that both the outside air temperature and the amount of stored electricity are equal to or higher than a predetermined threshold value (YES in S206), the control device 11 executes the second operation mode (S207) and ends the operation mode selection process. do.
　上述したとおり、太陽光発電電力及びバッテリー電力が優先的に使用されるため、実施の形態１の場合と同様に商用電力の使用を限定的なものとすることができ、その上でヒートポンプユニット１２を効率良く動作させることができる。 As described above, since the photovoltaic power generation power and the battery power are preferentially used, the use of commercial power can be limited as in the case of the first embodiment, and then the heat pump unit 12 Can be operated efficiently.
　また、ステップＳ２０６において外気温度が所定の閾値以上ではないと判定した場合（Ｓ２０６でＮＯ）、制御装置１１は、第３動作モードを実行し（Ｓ２０８）、動作モード選択処理を終了する。 If it is determined in step S206 that the outside air temperature is not equal to or higher than a predetermined threshold value (NO in S206), the control device 11 executes the third operation mode (S208), and ends the operation mode selection process.
　第３動作モードでは、ヒートポンプユニット１２の計画運転が行われる。この場合でも、第２動作モードの場合と同様に、太陽光発電電力及びバッテリー電力が商用電力よりも優先して使用されるため、商用電力の使用を限定的なものにすることができる。 In the third operation mode, the planned operation of the heat pump unit 12 is performed. Even in this case, as in the case of the second operation mode, the photovoltaic power generation power and the battery power are used in preference to the commercial power, so that the use of the commercial power can be limited.
　１，１０　給湯システム
　１１　制御装置
　１２　ヒートポンプユニット
　１３　貯湯タンク
　１４　ガスユニット
　１５　温度センサ
　１６　バッテリー
　２　　太陽光パネル
　３　　接続箱
　４　　パワーコンディショナ
　５　　分電盤
　６　　電流検出装置 1,10 Hot water supply system 11 Control device 12 Heat pump unit 13 Hot water storage tank 14 Gas unit 15 Temperature sensor 16 Battery 2 Solar panel 3 Junction box 4 Power conditioner 5 Distribution board 6 Current detector

Claims (8)

  1. 　太陽光発電により得られる電力及び商用電源から供給される電力により駆動するヒートポンプと、
    　前記ヒートポンプにより加熱して得られた湯水を貯湯する貯湯タンクと、
    　前記ヒートポンプの動作を制御する制御装置と
    　を備え、
    　前記制御装置は、前記太陽光発電の発電量が所定の閾値以上である場合、前記商用電源から前記ヒートポンプへの電力の供給を遮断し、前記太陽光発電により得られる電力を用いて前記ヒートポンプを動作させる第１動作モードを実行する、
    　給湯システム。     A heat pump driven by electric power obtained from solar power generation and electric power supplied from a commercial power source,
    A hot water storage tank that stores hot water obtained by heating with the heat pump, and
    It is equipped with a control device that controls the operation of the heat pump.
    When the amount of power generated by the solar power generation is equal to or greater than a predetermined threshold value, the control device cuts off the supply of electric power from the commercial power source to the heat pump, and uses the electric power obtained by the solar power generation to operate the heat pump. Execute the first operation mode to operate,
    Hot water supply system.
  2. 　前記太陽光発電により得られる電力を蓄積するバッテリーを
    　さらに備え、
    　前記制御装置は、前記太陽光発電の発電量が所定の閾値以上であり、且つ前記バッテリーの蓄電量が所定の閾値以上である場合、前記商用電源から前記ヒートポンプへの電力の供給を遮断し、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記バッテリーから供給される電力を用いて、前記ヒートポンプを動作させる前記第１動作モードを実行する、
    　請求項１に記載の給湯システム。     Further equipped with a battery for storing the electric power obtained by the solar power generation,
    When the amount of power generated by the solar power generation is equal to or greater than a predetermined threshold and the amount of electricity stored in the battery is equal to or greater than a predetermined threshold, the control device cuts off the supply of electric power from the commercial power source to the heat pump. Using the electric power obtained from the solar power generation, when the electric power is insufficient, the electric power supplied from the battery is used to execute the first operation mode for operating the heat pump.
    The hot water supply system according to claim 1.
  3. 　前記制御装置は、外気温度が所定の閾値以上である場合、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記商用電源から供給される電力を用いて、前記ヒートポンプを動作させる第２動作モードを実行する、
    　請求項１又は２に記載の給湯システム。     When the outside air temperature is equal to or higher than a predetermined threshold value, the control device uses the electric power obtained by the photovoltaic power generation, and when the electric power is insufficient, the electric power supplied from the commercial power source is used to drive the heat pump. Execute the second operation mode to operate,
    The hot water supply system according to claim 1 or 2.
  4. 　前記太陽光発電により得られる電力を蓄積するバッテリーを
    　さらに備え、
    　前記制御装置は、外気温度が所定の閾値以上であり、且つ前記バッテリーの蓄電量が所定の閾値以上である場合、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記バッテリーから供給される電力を用いて、さらに不足するときは前記商用電源から供給される電力を用いて、前記ヒートポンプを動作させる前記第２動作モードを実行する、
    　請求項３に記載の給湯システム。     Further equipped with a battery for storing the electric power obtained by the solar power generation,
    When the outside air temperature is equal to or higher than a predetermined threshold value and the amount of electricity stored in the battery is equal to or higher than a predetermined threshold value, the control device uses the electric power obtained by the solar power generation, and when the electric power is insufficient, the control device is described. The second operation mode for operating the heat pump is executed by using the electric power supplied from the battery and further using the electric power supplied from the commercial power source when the electric power is insufficient.
    The hot water supply system according to claim 3.
  5. 　太陽光発電により得られる電力及び商用電源から供給される電力により駆動するヒートポンプと、前記ヒートポンプにより加熱して得られた湯水を貯湯する貯湯タンクとを備える給湯システムの制御方法において、
    　前記太陽光発電の発電量が所定の閾値以上である場合、前記商用電源から前記ヒートポンプへの電力の供給を遮断し、前記太陽光発電により得られる電力を用いて前記ヒートポンプを動作させる第１動作モードを実行することを特徴とする、
    　給湯システムの制御方法。     In a control method of a hot water supply system including a heat pump driven by electric power obtained by photovoltaic power generation and electric power supplied from a commercial power source, and a hot water storage tank for storing hot water obtained by heating by the heat pump.
    When the amount of power generated by the solar power generation is equal to or greater than a predetermined threshold value, the first operation of shutting off the supply of electric power from the commercial power source to the heat pump and operating the heat pump using the electric power obtained by the solar power generation. Characterized by executing a mode,
    How to control the hot water supply system.
  6. 　前記給湯システムは、前記太陽光発電により得られる電力を蓄積するバッテリーをさらに備えており、
    　前記太陽光発電の発電量が所定の閾値以上であり、且つ前記バッテリーの蓄電量が所定の閾値以上である場合、前記商用電源から前記ヒートポンプへの電力の供給を遮断し、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記バッテリーから供給される電力を用いて、前記ヒートポンプを動作させる前記第１動作モードを実行する、
    　請求項５に記載の給湯システムの制御方法。     The hot water supply system further includes a battery for storing the electric power obtained by the photovoltaic power generation.
    When the amount of power generated by the solar power generation is equal to or higher than a predetermined threshold and the amount of electricity stored in the battery is equal to or higher than a predetermined threshold, the supply of electric power from the commercial power source to the heat pump is cut off, and the solar power generation is performed. Using the obtained electric power, when the electric power is insufficient, the electric power supplied from the battery is used to execute the first operation mode for operating the heat pump.
    The control method for a hot water supply system according to claim 5.
  7. 　外気温度が所定の閾値以上である場合、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記商用電源から供給される電力を用いて、前記ヒートポンプを動作させる第２動作モードを実行する、
    　請求項５又は６に記載の給湯システムの制御方法。     When the outside air temperature is equal to or higher than a predetermined threshold value, the electric power obtained from the photovoltaic power generation is used, and when the electric power is insufficient, the electric power supplied from the commercial power source is used to operate the heat pump. Run the mode,
    The method for controlling a hot water supply system according to claim 5 or 6.
  8. 　前記給湯システムは、前記太陽光発電により得られる電力を蓄積するバッテリーをさらに備えており、
    　外気温度が所定の閾値以上であり、且つ前記バッテリーの蓄電量が所定の閾値以上である場合、前記太陽光発電により得られる電力を用いて、当該電力で不足するときは前記バッテリーから供給される電力を用いて、さらに不足するときは前記商用電源から供給される電力を用いて、前記ヒートポンプを動作させる前記第２動作モードを実行する、
    　請求項７に記載の給湯システムの制御方法。     The hot water supply system further includes a battery for storing the electric power obtained by the photovoltaic power generation.
    When the outside air temperature is equal to or higher than a predetermined threshold and the amount of electricity stored in the battery is equal to or higher than a predetermined threshold, the electric power obtained from the solar power generation is used, and when the electric power is insufficient, the electric power is supplied from the battery. The second operation mode for operating the heat pump is executed by using the electric power and when the electric power is further insufficient, the electric power supplied from the commercial power source is used.
    The control method for a hot water supply system according to claim 7.
PCT/JP2020/020517 2020-04-24 2020-05-25 Hot water supply system and control method for same WO2021215022A1 (en)

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JP2010288375A (en) * 2009-06-11 2010-12-24 Panasonic Electric Works Co Ltd Grid-connected system
JP2016080248A (en) * 2014-10-16 2016-05-16 三菱電機株式会社 Hot water system
JP2017207249A (en) * 2016-05-19 2017-11-24 リンナイ株式会社 Hot water system
JP2018136103A (en) * 2017-02-23 2018-08-30 三菱電機株式会社 Hot water storage type water heater

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JP2016080248A (en) * 2014-10-16 2016-05-16 三菱電機株式会社 Hot water system
JP2017207249A (en) * 2016-05-19 2017-11-24 リンナイ株式会社 Hot water system
JP2018136103A (en) * 2017-02-23 2018-08-30 三菱電機株式会社 Hot water storage type water heater

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JP7368814B1 (en) 2023-03-31 2023-10-25 ダイキン工業株式会社 Electrical equipment and power systems with electrical equipment

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