WO2015104815A1 - Système de climatisation d'air et d'alimentation en eau chaude combinées - Google Patents

Système de climatisation d'air et d'alimentation en eau chaude combinées Download PDF

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Publication number
WO2015104815A1
WO2015104815A1 PCT/JP2014/050214 JP2014050214W WO2015104815A1 WO 2015104815 A1 WO2015104815 A1 WO 2015104815A1 JP 2014050214 W JP2014050214 W JP 2014050214W WO 2015104815 A1 WO2015104815 A1 WO 2015104815A1
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Prior art keywords
hot water
water supply
refrigerant
heat
heat exchanger
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PCT/JP2014/050214
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English (en)
Japanese (ja)
Inventor
智一 川越
博文 ▲高▼下
宏典 薮内
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三菱電機株式会社
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Priority to GB1601241.1A priority Critical patent/GB2537453A/en
Priority to JP2015556674A priority patent/JPWO2015104815A1/ja
Priority to PCT/JP2014/050214 priority patent/WO2015104815A1/fr
Publication of WO2015104815A1 publication Critical patent/WO2015104815A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/04—Other domestic- or space-heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/136—Defrosting or de-icing; Preventing freezing
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/227—Temperature of the refrigerant in heat pump cycles
    • F24H15/232—Temperature of the refrigerant in heat pump cycles at the condenser
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors of heat pumps
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/385—Control of expansion valves of heat pumps
    • 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
    • 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
    • F24H4/06—Air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H6/00—Combined water and air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/54—Heating and cooling, simultaneously or alternatively
    • 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 an air conditioning and hot water supply combined system capable of performing an air conditioning operation and a heating operation using cold water or hot water generated using a heat pump cycle.
  • the air conditioning and hot water supply combined system described in Patent Document 1 includes at least one heat source unit on which a compressor and a heat source side heat exchanger are mounted, and at least one on which an indoor side heat exchanger and an indoor side expansion device are mounted. At least one heating unit in which a water-refrigerant heat exchanger and a hot water supply side expansion device are mounted, and the indoor heat exchanger functions as a condenser or a radiator.
  • This is a system that enables simultaneous hot water supply operation (heating operation).
  • Patent Document 1 is not a system in which different refrigerant systems are connected in a complicated manner, an air conditioning and hot water supply complex system can be constructed at a very low cost.
  • the compressor is controlled so that the condensation temperature becomes constant to the target condensation temperature, and the subcooling degrees of the indoor unit and the hot water supply unit are respectively Supercooling degree control is performed to individually control the indoor side throttle device and the hot water supply side throttle device so as to achieve a corresponding target supercooling degree.
  • the target supercooling degree on the hot water supply unit side needs to be increased.
  • the hot water supply side throttle device is throttled in order to achieve the target degree of subcooling. As a result, the amount of refrigerant flowing through the hot water supply unit is reduced and heat cannot be transmitted to the water circuit side, and the hot water temperature is reduced. There was a problem of lowering.
  • the hot water supply unit is used as a capacity control, and the indoor unit is controlled to a supercooling degree (the indoor throttling device is controlled so that the target cooling temperature is kept constant and the supercooling degree becomes the target supercooling degree).
  • the indoor throttling device is controlled so that the target cooling temperature is kept constant and the supercooling degree becomes the target supercooling degree.
  • the present invention has been made to solve the above-described problems, and is an air-conditioning and hot water supply complex capable of suppressing a decrease in hot water temperature and a feeling of cold wind even when the inlet water temperature of the hot water supply unit is in a low water temperature range.
  • the purpose is to provide a system.
  • the combined air conditioning and hot water supply system includes at least one heat source unit on which a compressor and a heat source side heat exchanger are mounted, and at least one indoor unit on which an indoor side heat exchanger and an indoor expansion device are mounted. And at least one hot water supply unit on which a hot water supply side heat exchanger and a hot water supply side expansion device are mounted, and a refrigerant circuit that performs at least a heating operation in which the indoor heat exchanger functions as a condenser or a radiator,
  • An air-conditioning and hot-water supply complex system comprising a refrigerant in a refrigerant circuit and a hot water supply circuit that performs at least a heating operation for heating a heat medium by exchanging heat with a hot water supply side heat exchanger, and performing both a heating operation and a heating operation
  • the hot water supply side throttle device is controlled based on the required capacity of the hot water supply unit, and the hot water temperature priority mode for prohibiting the heating operation of the indoor unit is
  • the present invention even when the inlet water temperature of the hot water supply unit is in the low water temperature range, it is possible to suppress the decrease in the hot water temperature of the hot water supply unit and the feeling of cold air.
  • FIG. 1 shows an example of the mode switching threshold values A and B which switch between the hot water temperature priority mode and the continuation mode in the air-conditioning and hot water supply complex system according to Embodiment 1 of the present invention. It is a flowchart of control mode judgment of the air-conditioning / hot-water supply combined system which concerns on Embodiment 1 of this invention. It is a flowchart of control mode judgment of the air-conditioning / hot-water supply combined system which concerns on Embodiment 1 of this invention. It is a control-operation flowchart of the hot-water supply side throttle apparatus in the air-conditioning hot-water supply complex system according to Embodiment 1 of the present invention.
  • FIG. 1 is a refrigerant circuit diagram illustrating an example of a refrigerant circuit configuration of an air-conditioning and hot water supply complex system according to Embodiment 1 of the present invention. Based on FIG. 1, a structure and operation
  • the combined air conditioning and hot water supply system is installed in a building, condominium, hotel, etc., and can simultaneously supply an air conditioning load (cooling load, heating load) and a hot water supply load by using a refrigeration cycle that circulates refrigerant. It is.
  • the combined air conditioning and hot water supply system 100 includes at least a heat source unit (outdoor unit) 110, a load side unit (indoor unit) 210, and a hot water supply unit 310. Among these, the indoor unit 210 and the hot water supply unit 310 are connected to the heat source unit 110 in parallel.
  • the heat source unit 110 and the indoor unit 210 are connected by a liquid main pipe 1 that is a refrigerant pipe, a liquid branch pipe 4a that is a refrigerant pipe, a gas branch pipe 3a that is a refrigerant pipe, and a gas main pipe 2 that is a refrigerant pipe.
  • the heat source unit 110 and the hot water supply unit 310 are connected by a liquid main pipe 1 that is a refrigerant pipe, a liquid branch pipe 4b that is a refrigerant pipe, a gas branch pipe 3b that is a refrigerant pipe, and a gas main pipe 2 that is a refrigerant pipe.
  • the heat source unit 110 has a function of supplying hot or cold heat to the indoor unit 210 and the hot water supply unit 310.
  • the heat source unit 110 includes a compressor (heat source side compressor) 111, a flow path switching valve 112 as a flow path switching means, a heat source side heat exchanger 113, and an accumulator 115 connected in series.
  • the heat source unit 110 is provided with a blower 114 such as a fan for supplying air to the heat source side heat exchanger 113 in the vicinity of the heat source side heat exchanger 113.
  • the compressor 111 sucks the refrigerant flowing through the gas main pipe 2 and compresses the refrigerant to bring it into a high temperature / high pressure state.
  • the compressor 111 is not particularly limited as long as it can compress the sucked air-conditioning refrigerant to a high pressure state.
  • the compressor 111 can be configured using various types such as reciprocating, rotary, scroll, or screw.
  • the compressor 111 may be of a type that can be variably controlled by an inverter.
  • the flow path switching valve 112 switches the flow of the air conditioning refrigerant according to the required operation mode (cooling or heating).
  • the heat source side heat exchanger 113 functions as a radiator (condenser) during the cooling cycle, and functions as an evaporator during the heating cycle, and performs heat exchange between the air supplied from the blower 114 and the refrigerant to condense or liquefy the refrigerant. Evaporative gasification.
  • the accumulator 115 is disposed on the suction side of the compressor 111 and stores excess refrigerant.
  • the accumulator 115 may be any container that can store excess refrigerant.
  • the indoor unit 210 has a function of receiving heating or cooling supply from the heat source unit 110 and taking charge of heating load or cooling load.
  • an indoor expansion device 212 and an indoor heat exchanger 211 are mounted connected in series.
  • FIG. 1 although the state in which the one indoor unit 210 is mounted is shown as an example, the number is not particularly limited.
  • the indoor unit 210 may be provided with a blower such as a fan for supplying air to the indoor heat exchanger 211 in the vicinity of the indoor heat exchanger 211.
  • the indoor expansion device 212 has a function as a pressure reducing valve or an expansion valve, and expands the refrigerant by reducing the pressure.
  • the indoor throttle device 212 may be configured by a device whose opening degree can be variably controlled, for example, a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like.
  • a gas pipe temperature detection sensor 213G and a liquid pipe temperature detection sensor 213L are installed in the front and rear pipes of the indoor heat exchanger 211. Based on the temperature data information obtained from these sensors, the control means 220 determines the control amount of the indoor expansion device 212 and controls the refrigerant flow rate of the indoor expansion device 212.
  • the indoor heat exchanger 211 functions as a radiator (condenser) during the heating cycle and as an evaporator during the cooling cycle, and performs heat exchange between the air supplied from a blower (not shown) and the refrigerant to condense the refrigerant. It is liquefied or vaporized gas.
  • the hot water supply unit 310 has a function of receiving a supply of hot or cold heat from the heat source unit 110 and taking charge of a hot water supply load or a cooling load.
  • the hot water supply unit 310 is equipped with a hot water supply side expansion device 312 and a hot water supply side heat exchanger (refrigerant-water heat exchanger) 311 connected in series.
  • a hot water supply side expansion device 312 and a hot water supply side heat exchanger (refrigerant-water heat exchanger) 311 connected in series.
  • FIG. 1 although the state in which one hot water supply unit 310 is mounted is shown as an example, the number is not particularly limited.
  • the hot water supply side throttle device 312 has a function as a pressure reducing valve or an expansion valve, and expands the refrigerant by decompressing it.
  • the hot water supply side throttling device 312 may be configured by a device whose opening degree can be variably controlled, for example, a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like.
  • a gas pipe temperature detection sensor 313G and a liquid pipe temperature detection sensor 313L are installed in the front and rear pipes of the refrigerant-water heat exchanger 311.
  • the control unit 320 determines the control amount of the hot water supply side expansion device 312 and performs the refrigerant flow rate control of the hot water supply side expansion device 312.
  • the refrigerant-water heat exchanger 311 functions as a radiator (condenser) during the heating cycle and as an evaporator during the cooling cycle, and is supplied with water supplied from the water pipes 11 (11a, 11b) of the water circuit 10 serving as a hot water supply circuit. Heat exchange is performed with the refrigerant, and the refrigerant is condensed or evaporated.
  • the hot water supply unit 310 further includes a bypass pipe 314 that bypasses the hot water supply side expansion device 312 and the refrigerant-water heat exchanger 311 and a bypass valve 315 that controls the flow rate of the bypass pipe 314.
  • the bypass pipe 314 and the bypass valve 315 are used in “standard defrosting operation” described later, and the bypass valve 315 is always closed in other operations.
  • the water circuit 10 includes a pump and a hot water storage tank (not shown). That is, the water circuit 10 is established by circulating the water heated or cooled by the refrigerant-water heat exchanger 311 with the pump.
  • the water pipe 11 constituting the water circuit 10 may be constituted by a copper pipe, a stainless pipe, a steel pipe, a vinyl chloride pipe, or the like.
  • water has been described as an example of the heat medium circulating in the water circuit 10, it is not limited to water and may be an antifreeze or the like.
  • the water circuit 10 includes an inlet water temperature detection sensor 10a that detects the inlet water temperature, and an outlet water temperature detection sensor 10b that detects an outlet water temperature (hereinafter also referred to as hot water temperature).
  • Each of the heat source unit 110, the indoor unit 210, and the hot water supply unit 310 has a control means 120, a control means 220, and a control means 320.
  • Each control means uses the communication means 400, and the information that each has. introduce.
  • the control means 120, the control means 220, and the control means 320 are each constituted by a microcomputer or a DSP.
  • the control means 120 of the heat source unit 110 has a function of controlling the refrigerant pressure state and the refrigerant temperature state in the air conditioning and hot water supply complex system 100. Specifically, the control unit 120 controls the operating frequency of the compressor 111, the heat source side heat exchanger 113 is divided into a plurality of heat exchangers, and is not shown on the primary side of the heat source side heat exchanger 113. If the on-off valve is configured for each heat exchanger, the on-off valve is controlled to change the heat exchange area of the heat source side heat exchanger 113, the fan rotation speed of the blower 114 is controlled, It has a function of switching the path switching valve 112.
  • the control means 220 of the indoor unit 210 uses the information obtained from the gas pipe temperature detection sensor 213G and the liquid pipe temperature detection sensor 213L to determine the degree of superheat during the cooling operation of the indoor unit 210 and the heating operation of the indoor unit 210.
  • the indoor heat exchanger 211 is divided into a plurality of heat exchangers, and an on-off valve (not shown) is installed on the primary side of the indoor heat exchanger 211 for each heat exchanger. If it is a structure, it controls the on-off valve to change the heat exchange area of the indoor heat exchanger 211, controls the fan rotation speed of a blower (not shown), and controls the opening of the indoor expansion device 212. It has a function to do.
  • the control means 320 of the hot water supply unit 310 is based on information obtained from the gas pipe temperature detection sensor 313G, the liquid pipe temperature detection sensor 313L, the inlet water temperature detection sensor 10a, and the outlet water temperature detection sensor 10b, during the cooling operation of the hot water supply unit 310. And the function of controlling the degree of supercooling during the heating operation of the hot water supply unit 310 or the hot water temperature.
  • the refrigerant-water heat exchanger 311 is divided into a plurality of heat exchangers, and an on-off valve (not shown) is installed on the primary side of the refrigerant-water heat exchanger 311 for each heat exchanger. With this configuration, the on-off valve is controlled to change the heat exchange area of the refrigerant-water heat exchanger 311 and to control the opening degree of the hot water supply side expansion device 312.
  • each unit has a control unit and transmits information to each other to perform a cooperative process.
  • a configuration in which a control unit for controlling the entire air conditioning and hot water supply complex system 100 is also provided. Good.
  • the air conditioning and hot water supply complex system 100 includes a sensor that detects the refrigerant discharge pressure, a sensor that detects the refrigerant suction pressure, a sensor that detects the refrigerant discharge temperature, and a refrigerant suction temperature.
  • a sensor a sensor for detecting the temperature of the refrigerant flowing into and out of the heat source side heat exchanger 113, a sensor for detecting the outside air temperature taken into the heat source unit 110, a sensor for detecting the temperature of the air sucked into or blown into the indoor side heat exchanger 211,
  • a sensor or the like for detecting the temperature of water stored in a hot water storage tank may be provided.
  • Information (measurement information such as temperature information and pressure information) detected by these various sensors is sent to the control means 120 via the communication means 400 and used for controlling each actuator.
  • the refrigerant that can be used in the air-conditioning and hot water supply complex system 100 will be described.
  • Examples of the refrigerant that can be used in the refrigeration cycle of the air conditioning and hot water supply complex system 100 include a non-azeotropic refrigerant mixture, a pseudo-azeotropic refrigerant mixture, and a single refrigerant.
  • Non-azeotropic refrigerant mixture includes R407C (R32 / R125 / R134a) which is an HFC (hydrofluorocarbon) refrigerant.
  • this non-azeotropic refrigerant mixture is a mixture of refrigerants having different boiling points, it has a characteristic that the composition ratio of the liquid-phase refrigerant and the gas-phase refrigerant is different.
  • the pseudo azeotropic refrigerant mixture includes R410A (R32 / R125), R404A (R125 / R143a / R134a), which are HFC refrigerants, and the like.
  • This pseudo azeotrope refrigerant has the same characteristic as that of the non-azeotrope refrigerant and has an operating pressure of about 1.6 times that of R22.
  • the single refrigerant includes R22 which is an HCFC (hydrochlorofluorocarbon) refrigerant, R134a which is an HFC refrigerant, and the like. Since this single refrigerant is not a mixture, it has the property of being easy to handle. In addition, carbon dioxide, propane, isobutane, ammonia, etc., which are natural refrigerants, can also be used.
  • R22 represents chlorodifluoromethane
  • R32 represents difluoromethane
  • R125 represents pentafluoromethane
  • R134a represents 1,1,1,2-tetrafluoromethane
  • R143a represents 1,1,1-trifluoroethane. ing. Therefore, it is good to use the refrigerant
  • an antifreezing agent (brine) may be added to the water.
  • the type of antifreeze is not particularly limited, and may be selected according to availability and use, such as ethylene glycol and propylene glycol.
  • the operation performed in the air conditioning and hot water supply complex system 100 includes a heating (heating) operation and a cooling (cooling) operation. Both operations will be described below.
  • the heating (heating) operation the flow path switching valve 112 is switched to the dotted line side in FIG. 1, and in the cooling (cooling) operation, the flow path switching valve 112 is switched to the solid line side in FIG.
  • the air conditioning and hot water supply combined system 100 is a system in which the hot water supply unit 310 and the indoor unit 210 are designed with one refrigerant system.
  • a high temperature and high pressure refrigerant from the compressor 111 is supplied to the hot water supply unit 310 side to boil water in a storage tank (not shown) of the hot water supply unit 310, and a high temperature from the compressor 111.
  • the high-pressure refrigerant is switched to one of the heating operation (air-conditioning operation) in which the high-pressure refrigerant is supplied to the indoor unit 210 and hot air is supplied indoors.
  • a heating operation is performed at midnight or a considerable 1 to 2 hours
  • an air-conditioning operation is performed from morning to midnight (an image of boiling hot water stored in a tank and used for one day).
  • the air-conditioning hot-water supply complex system 100 of the first embodiment can also perform simultaneous operation in which both the hot-water supply operation and the heating operation are performed.
  • the high-pressure gas refrigerant heated and compressed by the compressor 111 is conveyed to the indoor unit 210 (or the hot water supply unit 310) via the flow path switching valve 112, the gas main pipe 2, and the gas branch pipe 3.
  • the refrigerant transferred to the indoor unit 210 (or hot water supply unit 310) is condensed by releasing heat to the indoor air (or water of the water circuit 10) in the indoor heat exchanger 211 or the refrigerant-water heat exchanger 311.
  • the action changes to a high-pressure liquid refrigerant.
  • the high-pressure liquid refrigerant changes into a low-pressure two-phase refrigerant (a refrigerant mixed with liquid and gas) by an expansion action in the indoor expansion device 212 (or the hot water supply-side expansion device 312) on the secondary side of the heat exchanger. .
  • the low-pressure two-phase refrigerant is changed into a low-pressure gas refrigerant by transferring heat from the air through the liquid branch pipe 4 and the liquid main pipe 1 in the heat source side heat exchanger 113 in the heat source unit 110.
  • the low-pressure gas refrigerant passes through the flow path switching valve 112 and the accumulator 115, is sucked in by the compressor 111, and changes to a high-pressure gas refrigerant.
  • the air conditioning and hot water supply combined system 100 can perform a heating (hot water supply) operation.
  • the refrigerant that has passed through the gas main pipe 2 is divided into each of the gas branch pipes 3a and 3b, and each refrigerant is divided into the indoor heat exchanger 211 and the indoor expansion device 212 of the indoor unit 210, and the hot water supply unit.
  • 310 passes through the refrigerant-water heat exchanger 311 and the hot water supply side expansion device 312 respectively, and flows into the liquid branch pipes 4a and 4b.
  • the refrigerants flowing into the liquid branch pipes 4a and 4b join the liquid main pipe 1 and then flow toward the heat source side heat exchanger 113.
  • the high-pressure gas refrigerant heated and compressed by the compressor 111 passes through the flow path switching valve 112 and is conveyed to the heat source side heat exchanger 113 in the heat source unit.
  • the heat source side heat exchanger 113 by releasing heat to the air, the high-pressure gas refrigerant is condensed and changed into a high-pressure liquid refrigerant.
  • the high-pressure liquid refrigerant is conveyed to the indoor unit 210 (or the hot water supply unit 310) through the liquid main pipe 1 and the liquid branch pipe 4.
  • the high-pressure liquid refrigerant is expanded by the indoor side expansion device 212 (or the hot water supply side expansion device 312), and the low-pressure two-phase refrigerant (the refrigerant mixed with gas and liquid).
  • the indoor heat exchanger 211 or refrigerant-water heat exchanger 311), the heat is transferred from the load to the low pressure gas refrigerant (the load side is deprived of heat). Cooled).
  • the low-pressure gas refrigerant exiting the indoor unit 210 (or the hot water supply unit 310) returns to the heat source unit 110 via the gas branch pipe 3 and the gas main pipe 2.
  • the low-pressure gas refrigerant that has flowed into the heat source unit 110 passes through the flow path switching valve 112 and the accumulator 115, is sucked in by the compressor 111, and changes to a high-pressure gas refrigerant.
  • the air conditioning and hot water supply combined system 100 can perform a cooling (cooling) operation.
  • the refrigerant is stored in the accumulator 115 because the refrigerant is left in the heating operation.
  • the target condensation temperature is determined so that the heating capacity can be exhibited in all the indoor units 210 connected to the heat source unit 110, and the refrigerant condensation temperatures of the indoor unit 210 and the hot water supply unit 310 are determined. Is controlled to be constant at the target condensation temperature. Therefore, when performing the heating operation and the heating operation at the same time, it is also important to maintain the refrigerant condensing temperature. If it is attempted to keep the refrigerant condensing temperature constant at the target condensing temperature, the inlet water temperature of the hot water supply unit 310 and the hot water supplying unit 310 are maintained. The relationship with the degree of supercooling is as shown in FIG.
  • FIG. 2 is a diagram showing the relationship between the degree of supercooling of the hot water supply unit of FIG. 1 and the inlet water temperature of the hot water supply unit.
  • the degree of supercooling (hereinafter referred to as SC_H) of the hot water supply unit 310 can be expressed by the following equation.
  • SC_H CT_H-TRL_H here, CT_H: Refrigerant condensation temperature TRL_H: Refrigerant-water heat exchanger 311 outlet refrigerant liquid tube temperature
  • the refrigerant liquid tube temperature TRL_H becomes a value almost close to the water temperature in the refrigerant-water heat exchanger 311.
  • the refrigerant condensing temperature of the hot water supply unit 310 is kept constant at the target condensing temperature, if the inlet water temperature of the hot water supply unit 310 is a low water temperature (for example, 25 ° C. to 35 ° C.), the degree of supercooling (SC_H) As shown in FIG. 2, it is necessary to set the target value of 1 to a considerably large value. Therefore, the hot-water supply side expansion device 312 in the hot-water supply unit 310 performs a considerably squeezed operation in an attempt to achieve the target value of the degree of supercooling. Then, since the gas refrigerant does not flow to the hot water supply unit 310, the ability cannot be exhibited even though the hot water supply unit 310 is in the heating operation.
  • SC_H degree of supercooling
  • air conditioning control in the indoor unit 210 is a technique for avoiding a situation where the hot water supply unit 310 cannot perform its ability during simultaneous operation in which heating operation is performed simultaneously with heating operation.
  • a “hot-water temperature priority mode” in which priority is given to the performance of the hot water supply unit 310 is provided.
  • the simultaneous operation in addition to the “hot water temperature priority mode”, there is a “continuation mode” which is the same control as the conventional one.
  • FIG. 3 is a diagram showing control outlines of the hot water temperature priority mode and the continuation mode in the combined air-conditioning and hot water system according to Embodiment 1 of the present invention.
  • the combined air conditioning and hot water supply system 100 has the “hot water temperature priority mode” and the “continuation mode”, which is the same control as in the past, as the control mode in the heating operation (or heating operation).
  • the “hot water temperature priority mode” and the “continuation mode” have different control methods for the hot water supply side expansion device 312 of the hot water supply unit 310. Each mode will be described below.
  • the hot water supply unit 310 performs its own capacity control regardless of the refrigerant condensation temperature, and does not control the degree of supercooling.
  • the self capability control is control for controlling the hot water supply side throttle device 312 based on the required capability required for the hot water supply unit 310, and controls the hot water supply side throttle device 312 so that the hot water temperature becomes the target hot water temperature.
  • Control Specifically, the hot water supply side expansion device 312 is controlled in accordance with the temperature difference between the hot water temperature detected by the outlet water temperature detection sensor 10b and the target hot water temperature, and the hot water supply side expansion device increases as the temperature difference increases.
  • the opening value of 312 is determined to be a large value.
  • the “hot water temperature priority mode” is a control that prioritizes the hot water supply capacity on the hot water supply unit 310 side, and does not control the degree of supercooling, so the refrigerant condensing temperature of the air-conditioning hot water supply combined system 100 becomes a matter of course.
  • the “hot water temperature priority mode” when the outlet water temperature is in a low water temperature range, that is, when the load on the hot water supply unit 310 is high, a large amount of refrigerant is supplied to the refrigerant-water heat exchanger 311. The side diaphragm device 312 is opened.
  • the refrigerant condensation temperature does not increase. That is, in the “hot water temperature priority mode”, the refrigerant condensation temperature does not rise to the target condensation temperature.
  • the heating operation of the indoor unit 210 is permitted in the “hot water temperature priority mode”, cold air is blown out from the indoor unit 210, giving the user a feeling of cold air. Therefore, in the “hot water temperature priority mode”, the operation unit is restricted on the indoor unit 210 side. Specifically, the indoor side expansion device 212 is closed, and a blower (not shown) that blows air to the indoor side heat exchanger 211 is stopped. That is, in the “hot water temperature priority mode”, simultaneous operation is not permitted, and only heating operation is performed.
  • FIG. 4 is an explanatory diagram of control mode switching in the combined air-conditioning and hot water supply system according to Embodiment 1 of the present invention.
  • the air-conditioning and hot water supply combined system 100 two modes of the “hot water temperature priority mode” and the “continuation mode” are switched based on the inlet water temperature detected by the inlet water temperature detection sensor 10a. That is, during operation in the “hot water temperature priority mode”, when the inlet water temperature detected by the inlet water temperature detection sensor 10a becomes higher than the preset mode switching threshold A and the inlet water temperature is no longer in the low water temperature range, To "".
  • the “continuation mode” is set. continue.
  • the inlet water temperature detected by the inlet water temperature detection sensor 10a is equal to or lower than the mode switching threshold A, that is, if the outlet water temperature is in the low water temperature range, during operation in the “continuation mode”, the mode is switched to the “hot water temperature priority mode”.
  • FIG. 5 is a diagram showing an example of mode switching thresholds A and B for switching between the hot water temperature priority mode and the continuous mode in the combined air-conditioning and hot water supply system according to Embodiment 1 of the present invention.
  • the mode switching thresholds A and B can be manually changed by, for example, a hot water supply unit installation switch (DipSW).
  • DipSW hot water supply unit installation switch
  • the mode switching threshold A is set to 30 ° C.
  • the mode switching threshold B is set to 35 ° C.
  • the switching threshold B can be changed to 40 ° C. Note that although manual switching has been described in this specification, it may be switched by a control signal from an external communication device.
  • the control mode can be switched flexibly according to the application at the site. For example, if the inlet water temperature is up to 40 ° C., if you want to activate the “hot water temperature priority mode”, change the DipSW setting from default to setting 3 to change the ratio of the “hot water temperature priority mode” to “continue” It is possible to increase compared to “mode”.
  • the threshold value can be changed in units of 5 ° C. so that the local service person or the installation contractor can finely set the local use.
  • this “5 ° C.” is an example. It is not limited to temperature.
  • Control mode judgment The control mode determination according to the first embodiment will be described with reference to flowcharts shown in FIGS. Note that FIG. 6 and FIG. 7 are separate logics, and the control may be arbitrarily changed according to the form and application of the unit.
  • FIG. 6 is a flowchart of control mode determination of the combined air-conditioning and hot water system according to Embodiment 1 of the present invention.
  • the control means 320 of the hot water supply unit 310 sets the control mode to the “hot water temperature priority mode” as an initial setting (S1) when the start of the heating operation is instructed or when the hot water temperature is lower than the target hot water temperature and the thermo is turned on.
  • the initial setting is set to the “hot water temperature priority mode”, but it may be set to the “continuation mode”.
  • the control unit 320 checks the setting of DipSW and confirms the mode switching thresholds A and B (S2). Thereafter, mode determination processing (S3, S4) is performed.
  • the mode determination process first, it is determined whether or not the inlet water temperature detected by the inlet water temperature detection sensor 10a is equal to or higher than the mode switching threshold B (S3). If the inlet water temperature is equal to or higher than the mode switching threshold B, the mode is switched to “continuation mode” (S5). If the inlet water temperature is lower than the mode switching threshold B, it is subsequently determined whether the inlet water temperature is equal to or lower than the mode switching threshold A ( S4).
  • the “hot water temperature priority mode” is maintained (S6), and if the inlet water temperature is higher than the mode switching threshold A, the current The mode is maintained (S7).
  • the “hot water temperature priority mode” is set as the initial setting, the “hot water temperature priority mode” remains unchanged.
  • control unit 320 determines whether the hot water supply unit 310 has been turned off or an instruction to stop the operation of the hot water supply unit 310 is made (S8). If neither is satisfied, the process returns to step S3.
  • the processes from step S3 to step S7 are sequentially performed at arbitrarily set control time intervals until the hot water supply unit 310 is thermo-OFF or the operation stop of the hot water supply unit 310 is instructed.
  • the “hot water temperature priority mode” is executed. Since the inlet water temperature is a temperature that depends on the temperature environment of the outside air and is not a temperature that changes due to the operation of the hot water supply unit 310, once it is determined in step S4 that the inlet water temperature is equal to or lower than the mode switching threshold A, usually, for a while During this time, the “hot water temperature priority mode” is continuously performed. Thereby, the hot water temperature detected by the outlet water temperature detection sensor 10b gradually increases toward the target hot water temperature. Then, when the hot water temperature reaches the target hot water temperature and the hot water supply unit 310 is thermo-OFF, the control in FIG. 6 is terminated.
  • the air-conditioning and hot-water supply complex system determines switching between the “hot water temperature priority mode” and the “continuation mode”, but in FIG. 7, this determination is performed by an external communication device. .
  • FIG. 7 is a flowchart of control mode determination of the combined air-conditioning and hot-water supply system according to Embodiment 1 of the present invention.
  • the control means 320 of the hot water supply unit 310 sets the control mode to the “hot water temperature priority mode” as an initial setting when the start of the heating operation is instructed or when the hot water temperature is lower than the target hot water temperature and the thermostat is turned on (S11). .
  • the “hot water temperature priority mode” is set, but the “continuous mode” may be set.
  • the control means 320 implements confirmation (S12) whether the mode change signal is received.
  • the mode change signal is a signal transmitted from an external communication device outside the air conditioning and hot water supply complex system 100.
  • the external communication device is, for example, a monitoring device that monitors the operation state of the air conditioning and hot water supply complex system 100.
  • the control means 320 determines the mode change content (S13). If the received mode change signal instructs the “hot water temperature priority mode”, the control means 320 performs the “hot water temperature priority mode” (S14), and if it instructs the “continuation mode”, The “continuation mode” is executed (S15). On the other hand, when it is determined in step S12 that the mode change signal has not been received, the control means 320 maintains the current mode (S16).
  • control means 320 determines whether the hot water supply unit 310 is thermo-off or has been instructed to stop the operation of the hot water supply unit 310 (S17), and if neither is satisfied, the process returns to step S12.
  • the processes from step S12 to step S16 are sequentially performed at arbitrarily set control time intervals until the hot water supply unit 310 is thermo-OFF or the operation stop of the hot water supply unit 310 is instructed.
  • the external communication device outside the air conditioning and hot water supply combined system 100 is connected to the inlet water temperature detection sensor 10a or the control means 320 so that the detection signal of the inlet water temperature detection sensor 10a can be received. Then, when the inlet water temperature detected by the inlet water temperature detection sensor 10a is equal to or lower than the mode switching threshold A, the external communication device transmits a mode change signal instructing the “hot water temperature priority mode” to the hot water supply unit 310. Further, when the inlet water temperature detected by the inlet water temperature detection sensor 10 a is equal to or higher than the mode switching threshold B, the external communication device transmits a mode change signal instructing “continuation mode” to the hot water supply unit 310.
  • FIG. 8 is a flowchart of the control operation of the hot water supply side throttle device in the combined air conditioning and hot water supply system according to Embodiment 1 of the present invention.
  • the control means 320 of the hot water supply unit 310 performs a process (S21) for confirming the currently set control mode. If the currently set control mode is the “hot water temperature priority mode”, the hot water supply unit 310 subsequently checks the outlet water temperature (hot water temperature) detected by the outlet water temperature detection sensor 10b (S22), and sets the target hot water temperature. Confirmation (S23) is performed.
  • the hot water supply unit 310 determines the opening value of the hot water supply side expansion device 312 according to the temperature difference between the target hot water temperature and the hot water temperature, and controls the hot water supply side expansion device 312 so as to be the opening value (S24). ) Specifically, as described above, as the water temperature difference between the target hot water temperature and the hot water temperature is larger, the opening degree value of the hot water supply side expansion device 312 is determined to be a larger value, and the amount of refrigerant flowing into the refrigerant-water heat exchanger 311 is determined. Thus, the control for increasing the capacity of the hot water supply unit 310 is performed.
  • the hot water supply unit 310 subsequently checks the degree of supercooling (S25) and the target degree of supercooling (S26). Then, the hot water supply unit 310 determines the opening value of the hot water supply side expansion device 312 according to the difference between the target supercooling degree and the subcooling degree, and controls the hot water supply side expansion device 312 so as to be the opening value (S27). )
  • FIG. 9 is a control operation flowchart regarding the operation prohibition process of the indoor unit in the air conditioning and hot water supply complex system according to Embodiment 1 of the present invention.
  • the control means 320 of the hot water supply unit 310 performs processing (S31) for checking the currently set control mode. If the currently set control mode is the “hot water temperature priority mode”, the hot water supply unit 310 performs a process of imposing a restriction on prohibition of operation on the indoor unit 210 (S32). Specifically, as described above, the indoor expansion device 212 is closed, and the blower (not shown) that blows air to the indoor heat exchanger 211 is stopped.
  • the hot water supply unit 310 performs a process (S33) for releasing the restriction on prohibition of operation for the indoor unit 210.
  • the hot water supply unit 310 has shown the form which imposes restrictions of a driving
  • running prohibition with respect to the indoor unit 210 in the above, you may make it as follows. That is, in the control system configuration, if the heat source unit 110 is a system responsible for the operation restriction of the indoor unit 210, the control means 120 of the heat source unit 110 is operated from the control means 320 of the hot water supply unit 310 to the operation restriction information of the indoor unit 210 (for example, The operation mode of the hot water supply unit 310 information of the hot water temperature priority mode) may be received, and the heat source unit 110 may implement the operation restriction of the indoor unit 210 based on the operation restriction information. Further, the communication means at that time may be implemented by the control means (120, 220, 320) possessed by each unit and the communication means 400.
  • a defrosting operation for melting and removing frost attached to the heat source side heat exchanger 113 is performed at an appropriate timing during the heating operation.
  • the defrosting operation will be described, and then the availability of the water sampling heat defrosting operation during the defrosting operation will be described.
  • the refrigerant flows in the order of the compressor 111 ⁇ the flow path switching valve 112 ⁇ the heat source side heat exchanger 113 ⁇ the liquid main pipe 1 ⁇ the liquid branch pipe 4a and the liquid branch pipe 4b ⁇ the indoor unit 210 and the hot water supply unit 310. Then, the refrigerant that has passed through the gas branch pipes 3 a and 3 b flows from the gas main pipe 2 ⁇ the flow path switching valve 112 ⁇ the accumulator 115 ⁇ the compressor 111.
  • the refrigerant passes through the indoor expansion device 212 ⁇ the indoor heat exchanger 211 and flows to the gas branch pipe 3a.
  • the defrosting operation is classified into “standard defrosting operation” and “water sampling heat defrosting operation”.
  • the “standard defrosting operation” is an operation for melting the frost formed on the heat source side heat exchanger 113 with only the heat amount (work amount) of the compressor 111, and the refrigerant in the hot water supply unit 310 in the “standard defrosting operation”.
  • the flow is as follows. That is, in the “standard defrosting operation”, the refrigerant flows from the bypass pipe 314 to the bypass valve 315 to the gas branch pipe 3b.
  • the “water sampling heat defrosting operation” uses the heat transferred from the water flowing through the water circuit 10 in the water heat exchanger 311 in addition to the amount of heat (work amount) of the compressor 111, and heat source side heat exchange.
  • the refrigerant flow in the hot water supply unit 310 in the “water sampling defrosting operation” is as follows. That is, the refrigerant in the “water sampling heat defrosting operation” passes through the hot water supply side expansion device 312 ⁇ the refrigerant-water heat exchanger 311 and flows to the gas branch pipe 3b.
  • the air conditioning and hot water supply combined system 100 switches the flow path switching valve 112 to the solid line side in FIG. It is determined whether the operation is “operation” or “water sampling / defrosting operation”. Then, the bypass valve 315 is controlled such that the determined operation is performed.
  • the “water sampling heat defrosting operation” has higher defrosting efficiency than the “standard defrosting operation” because the heat received from the water flowing on the water circuit 10 side is also used for defrosting.
  • the refrigerant-water heat exchanger 311 performs hydrothermal freezing freeze (specifically, In other words, the water in the water circuit of the refrigerant-water heat exchanger 311 freezes and expands in volume, which causes excessive stress on the inside of the refrigerant-water heat exchanger 311 and leads to breakage). is there.
  • control means 320 of the hot water supply unit 310 determines whether or not the “water sampling heat defrosting operation” is permitted based on the current operation state, and when it determines that the “water sampling heat defrosting operation” is permitted, When the “heat extraction defrosting operation” is performed and it is determined that the “water extraction heat defrosting operation” is not permitted, the “standard defrosting operation” is performed.
  • FIG. 10 is a control operation flowchart in the water sampling / defrosting operation availability in the combined air conditioning and hot water supply system according to Embodiment 1 of the present invention.
  • the control means 320 of the hot water supply unit 310 performs processing (S41) for confirming the currently set control mode. If the currently set control mode is the “hot water temperature priority mode”, the hot water supply unit 310 subsequently has an inlet water temperature detected by the inlet water temperature detection sensor 10a greater than or equal to a preset water sampling defrost setting value.
  • the hot water supply unit 310 determines that the inlet water temperature is equal to or higher than the water sampling heat defrosting set value, it determines that the “water sampling heat defrosting operation” is permitted, and performs the “water sampling heat defrosting operation” (S43). Specifically, the hot water supply unit 310 closes the bypass valve 315 so that the refrigerant flows into the refrigerant-water heat exchanger 311. In addition, when it is determined in step S41 that the currently set control mode is the “continuation mode”, the “water sampling heat defrosting operation” is similarly performed (S43).
  • step S42 determines that the inlet water temperature is less than the water sampling heat defrosting set value
  • the hot water supply unit 310 determines that the “water sampling heat defrosting operation” is not permitted and performs the “standard defrosting operation”.
  • Implement (S44) Specifically, the hot water supply unit 310 opens the bypass valve 315 so that the refrigerant flows through the bypass pipe 314.
  • the control mode during the simultaneous operation controls the hot water supply side expansion device 312 for the purpose of securing the hot water temperature of the hot water supply unit 310, and the hot water that prohibits the operation of the indoor unit 210.
  • the temperature priority mode and the continuous mode in which the simultaneous operation is continued are switched according to the inlet water temperature of the hot water supply unit 310. For this reason, the operation according to the inlet water temperature of the hot water supply unit 310 is possible, the decrease in the hot water temperature when the inlet water temperature is in the low water temperature range can be suppressed, and the operation without causing the user to feel the cold air in the room is possible. Become.
  • Cooling and radiator in an indoor unit heating is performed with hot water conveyed from a hot water supply unit
  • the role is shared by each device such as heating. Therefore, it is very rare to simultaneously perform the heating operation of the indoor unit and the heating operation of the hot water supply unit.
  • the operation restriction of the indoor unit 210 in the “hot water temperature priority mode” does not become a problem by introducing the present invention.
  • the indoor heating is performed not by the indoor unit 210 but by a water-air heat exchanger (not shown) provided in the water circuit 10. Can be heated with warm water and heated. Therefore, the operation restriction of the indoor unit 210 in the “hot water temperature priority mode” does not become a problem, and the protection function as the air conditioning and hot water supply complex system 100 can be exhibited correctly.
  • control unit 320 of the hot water supply unit 310 operates in a self-distributed manner.
  • control unit 120 of the heat source unit 110 acquires necessary information via the communication unit 400, and the hot water supply unit 310 may be controlled. That is, the processing of the flowcharts shown in FIGS. 7 to 10 may be performed on the control means 120 side.
  • the connected hot water supply unit 310 Capacity may also be added to the criteria. For example, if “inlet water temperature ⁇ B or the capacity ratio between the heat source unit 110 and the hot water supply unit 310 is larger than an arbitrarily determined value” in S3 of FIG. 6, the continuation mode (S5) is determined. Also good.

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Abstract

L'invention concerne un moyen de commande (320) qui comprend, en tant que mode de commande pendant un fonctionnement simultané dans lequel à la fois une opération de chauffage et une opération de chauffage d'eau sont réalisées, ce qui suit : un mode de priorité de température de piquage dans lequel un dispositif de régulation du côté alimentation en eau chaude (312) est commandé sur la base de la capacité requise d'une unité d'alimentation en eau chaude (310), et l'opération de chauffage d'une unité intérieure (210) est interdite ; et un mode de maintien dans lequel le fonctionnement simultané est maintenu. Le moyen de commande (320) fait basculer le mode de commande pendant le fonctionnement simultané sur le mode de priorité de température de piquage ou le mode de maintien conformément à la température d'admission d'un milieu thermique dans un échangeur de chaleur réfrigérant-eau (311).
PCT/JP2014/050214 2014-01-09 2014-01-09 Système de climatisation d'air et d'alimentation en eau chaude combinées WO2015104815A1 (fr)

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GB1601241.1A GB2537453A (en) 2014-01-09 2014-01-09 Combined air-conditioning and hot-water supply system
JP2015556674A JPWO2015104815A1 (ja) 2014-01-09 2014-01-09 空調給湯複合システム
PCT/JP2014/050214 WO2015104815A1 (fr) 2014-01-09 2014-01-09 Système de climatisation d'air et d'alimentation en eau chaude combinées

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CN107144015A (zh) * 2017-05-05 2017-09-08 广东美的暖通设备有限公司 热水器控制方法、热水器控制系统及热泵热水器
EP3299732A1 (fr) * 2016-09-23 2018-03-28 Daikin Industries, Limited Systeme de climatisation et d'alimentation en eau chaude
WO2018100729A1 (fr) * 2016-12-02 2018-06-07 三菱電機株式会社 Dispositif à cycle de réfrigération
CN113551398A (zh) * 2021-03-23 2021-10-26 珠海格力电器股份有限公司 一种多联机系统的控制方法、多联机系统和存储介质
WO2023207648A1 (fr) * 2022-04-25 2023-11-02 艾欧史密斯(中国)热水器有限公司 Système combiné de production d'eau chaude et de chauffage, et dispositif de commande et son procédé de commande

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