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WO2023045287A1 - 多联机热泵系统及其控制方法、计算机可读存储介质 - Google Patents

多联机热泵系统及其控制方法、计算机可读存储介质 Download PDF

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Publication number
WO2023045287A1
WO2023045287A1 PCT/CN2022/082329 CN2022082329W WO2023045287A1 WO 2023045287 A1 WO2023045287 A1 WO 2023045287A1 CN 2022082329 W CN2022082329 W CN 2022082329W WO 2023045287 A1 WO2023045287 A1 WO 2023045287A1
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WO
WIPO (PCT)
Prior art keywords
temperature
value
target
frequency
indoor unit
Prior art date
Application number
PCT/CN2022/082329
Other languages
English (en)
French (fr)
Inventor
陶骙
钟文朝
黎顺全
张�浩
Original Assignee
广东美的制冷设备有限公司
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Priority to EP22871352.5A priority Critical patent/EP4379272A4/en
Publication of WO2023045287A1 publication Critical patent/WO2023045287A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0003—Exclusively-fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/86—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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/003—Indoor unit with water as a heat sink or heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0253—Compressor control by controlling speed with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2103—Temperatures near a heat exchanger

Definitions

  • the present application relates to the technical field of multi-connected heat pump systems, and in particular to a control method of a multi-connected heat pump system, a multi-connected heat pump system and a computer-readable storage medium.
  • the air source heat pump adds a hydraulic module to provide capillary floor radiant heating, radiator heating, etc., and can also provide a heat source for the domestic water storage tank.
  • the operating frequency of the outdoor compressor is generally adjusted according to the preset fixed exhaust pressure or the temperature in the middle of the coil of the air duct inner unit, which is easy.
  • the output capacity of the compressor does not match the actual heat exchange demand in the room, resulting in the inability to effectively balance the indoor environment temperature regulation and the heat supply of the hydraulic module.
  • the main purpose of this application is to provide a control method for a multi-connected heat pump system, a multi-connected heat pump system, and a computer-readable storage medium, aiming at accurately matching the output capacity of the compressor with the actual heat exchange demand in the room, so that the indoor environment temperature can be adjusted Effectively balance with the heat supply of the hydraulic module.
  • the present application provides a control method for a multi-connected heat pump system
  • the multi-connected heat pump system includes a compressor, at least one hydraulic module and at least one air-conditioning indoor unit, the at least one hydraulic module and the at least one The indoor units of the air conditioner are all connected to the compressor
  • the control method of the multi-connected heat pump system includes the following steps:
  • the first energy demand information represents the heating capacity demand of the at least one air-conditioning indoor unit, so The second energy demand information characterizes the heating capacity demand of the at least one hydraulic module;
  • the operating frequency of the compressor is adjusted according to the target parameters corresponding to the first energy demand information and the second energy demand information.
  • the step of adjusting the operating frequency of the compressor according to the target parameters corresponding to the first energy demand information and the second energy demand information includes:
  • the operation of the compressor is adjusted according to the temperature of the indoor heat exchanger of the currently turned on air-conditioning indoor unit frequency, the target parameters include the indoor heat exchanger temperature;
  • the operating frequency of the compressor is adjusted according to the outlet water temperature of the hydraulic module, and the target parameter includes the outlet water temperature.
  • the step of temperature adjusting the operating frequency of the compressor comprises:
  • the compressor is controlled to operate at the first target frequency.
  • the step of determining the first frequency correction value according to the temperature of the indoor heat exchanger and the preset temperature of the heat exchanger includes:
  • a first target correction value is the first frequency correction value
  • the second target correction value is the first frequency correction value
  • the second preset temperature difference is less than or equal to the first preset temperature difference, the first target frequency corresponding to the first target correction value is greater than the initial frequency, and the second target correction value corresponds to the The first target frequency is less than the initial frequency.
  • the step before the step of adjusting the operating frequency of the compressor according to the temperature of the indoor heat exchanger of the currently turned-on air conditioner indoor unit, the step further includes:
  • the discharge pressure of the compressor is acquired;
  • the first energy demand information is that the heating capacity demanded by the at least one air-conditioning indoor unit is greater than a first preset value, obtain the rated heating capacity of the currently turned on air-conditioning indoor unit and its corresponding indoor heat exchanger coil temperature;
  • the indoor heat exchanger temperature is determined according to the coil temperature and its corresponding weight value.
  • the step of acquiring the first energy demand information of the at least one air conditioner indoor unit and the second energy demand information of the at least one hydraulic module it further includes:
  • the first energy demand information is that the heating capacity required by the at least one air-conditioning indoor unit is greater than a first preset value, acquiring installation status information of the pressure sensor on the discharge side of the compressor;
  • the step of obtaining the discharge temperature of the compressor and the step of determining the current open pressure sensor according to the discharge temperature are performed. Steps for the condensing temperature of the indoor unit of the air conditioner;
  • the step of obtaining the rated heat output of the currently turned on air conditioner indoor unit and the coil temperature of the corresponding indoor heat exchanger is performed. steps, the step of determining the weight value of each currently turned on air-conditioning indoor unit according to the rated heat output, and the step of determining the temperature of the indoor heat exchanger according to the coil temperature and its corresponding weight value.
  • the step of adjusting the operating frequency of the compressor according to the outlet water temperature of the hydraulic module includes:
  • the compressor is controlled to operate at the second target frequency.
  • the step of determining the current first condensation temperature of the hydraulic module according to the outlet water temperature includes:
  • the first condensation temperature is determined according to the reference condensation temperature.
  • the step of determining the temperature correction value according to the outlet water temperature and the set water temperature of the hydraulic module includes:
  • the temperature adjustment value shows an increasing trend with the increase of the second temperature difference value, and/or, the temperature adjustment value shows a decreasing trend with the decrease of the second temperature difference value.
  • the step of determining the first condensation temperature according to the reference condensation temperature includes:
  • the reference condensing temperature is the first condensing temperature
  • the minimum critical value is the first condensing temperature
  • the maximum critical value is the first condensing temperature.
  • the step of determining the first condensing temperature according to the reference condensing temperature it further includes:
  • the maximum critical value is determined according to the outdoor ambient temperature and the operating frequency.
  • the step of determining a second frequency correction value according to the first condensing temperature and the target condensing temperature includes:
  • a third target correction value is the second frequency correction value
  • a fourth target correction value is the second frequency correction value
  • the fourth preset temperature difference is less than or equal to the third preset temperature difference, the second target frequency corresponding to the third target correction value is greater than the initial frequency, and the fourth target correction value corresponds to the The second target frequency is less than the initial frequency.
  • the response to the first energy demand information is that the heating capacity required by the at least one air conditioner indoor unit is less than or equal to the first preset value
  • the second energy demand information is the In the case where the heating capacity required by at least one hydraulic module is greater than the second preset value
  • the step of adjusting the operating frequency of the compressor according to the outlet water temperature of the hydraulic module includes:
  • the compressor is controlled to operate at the third target frequency.
  • the first target temperature difference is the temperature difference between the first actual condensing temperature and the set condensing temperature of the hydraulic module at the current moment
  • the second target temperature difference is the last adjustment based on the outlet water temperature of the hydraulic module.
  • the temperature difference between the second actual condensing temperature of the hydraulic module and the set condensing temperature at the frequency of the compressor, the first actual condensing temperature is the parameter corresponding to the outlet water temperature, and the second actual condensing temperature is the set Describe the parameters corresponding to the outlet water temperature.
  • the step of determining the third target frequency according to the first target temperature difference, the second target temperature difference, the outlet water temperature and the set water temperature of the hydraulic module includes:
  • the third target frequency shows an increasing trend with the increase of the third temperature difference value
  • the third target frequency shows an increasing trend with the increase of the fourth temperature difference value
  • the step of adjusting the operating frequency of the compressor according to the target parameters corresponding to the first energy demand information and the second energy demand information it further includes:
  • the first target heat exchange temperature and/or the second target heat exchange temperature are determined according to the first energy demand information and the second energy demand information.
  • the step of adjusting the opening degree of the first electronic expansion valve of the air conditioner indoor unit includes:
  • the first opening degree adjustment value tends to increase with the increase of the first deviation value.
  • the step of adjusting the opening degree of the second electronic expansion valve of the hydraulic module includes:
  • the second opening degree adjustment value tends to increase with the increase of the second deviation value.
  • the present application also proposes a multi-connection heat pump system, the multi-connection heat pump system includes:
  • At least one air-conditioning indoor unit, the at least one hydraulic module and the at least one air-conditioning indoor unit are both connected to the compressor;
  • the control device, the compressor, the at least one hydraulic module, and the at least one air-conditioning indoor unit are all connected to the control device, and the control device includes: a memory, a processor, and stored in the memory and can be The control program of the multi-connection heat pump system running on the processor, when the control program of the multi-connection heat pump system is executed by the processor, the steps of the control method of the multi-connection heat pump system as described in any one of the above are realized.
  • the present application also proposes a computer-readable storage medium, the computer-readable storage medium stores a control program of a multi-connection heat pump system, and the control program of the multi-connection heat pump system is executed by a processor When implementing the steps of the control method for a multi-connected heat pump system as described in any one of the above.
  • a control method for a multi-connected heat pump system proposed in this application is based on a multi-connected heat pump system in which a compressor is connected to at least one hydraulic module and at least one air-conditioning indoor unit.
  • the first energy demand information and the second energy demand information determine the corresponding target parameters to regulate the frequency of the compressor, so as to ensure that the output capacity of the compressor can meet the actual heat exchange demand of the indoor unit of the air conditioner and the hydraulic module at the same time, and realize the compressor.
  • the output capacity is accurately matched with the actual indoor heat exchange demand, so that the indoor environment temperature adjustment and the heat supply of the hydraulic module can be effectively balanced.
  • Fig. 1 is the schematic structural diagram of the multi-line heat pump system of the present application
  • FIG. 2 is a schematic diagram of the hardware structure involved in the operation of an embodiment of the multi-connected heat pump system of the present application
  • FIG. 3 is a schematic flowchart of an embodiment of a control method for a multi-connected heat pump system of the present application
  • FIG. 4 is a schematic flowchart of another embodiment of the control method of the multi-connected heat pump system of the present application.
  • Fig. 5 is a schematic flowchart of another embodiment of the control method of the multi-connected heat pump system of the present application.
  • Fig. 6 is a numerical relationship diagram between the second temperature difference value and the temperature adjustment value involved in the embodiment in Fig. 5;
  • Fig. 7 is a schematic flowchart of another embodiment of the control method of the multi-connected heat pump system of the present application.
  • Fig. 8 is a schematic flowchart of another embodiment of the control method of the multi-connected heat pump system of the present application.
  • the main solution of the embodiment of the present application is to propose a control method based on a multi-connected heat pump system
  • the multi-connected heat pump system includes a compressor, at least one hydraulic module and at least one air-conditioning indoor unit, the at least one hydraulic module and the The at least one air-conditioning indoor unit is connected to the compressor, and the method includes: acquiring first energy demand information of the at least one air-conditioning indoor unit and second energy demand information of the at least one hydraulic module; the first The energy demand information represents the heating capacity demand of the at least one air conditioner indoor unit, and the second energy demand information represents the heating capacity demand of the at least one hydraulic module; according to the first energy demand information and the second The target parameter corresponding to the information can be used to adjust the operating frequency of the compressor.
  • the operating frequency of the outdoor compressor is generally set according to the preset fixed exhaust pressure or the temperature in the middle of the coil of the air ducted internal unit. It is easy to make the output capacity of the compressor mismatch with the actual heat exchange demand in the room, resulting in frequent shutdown of the compressor.
  • This application provides the above-mentioned solution, aiming to realize the precise matching between the output capacity of the compressor and the actual heat exchange demand in the room, so that the indoor environment temperature adjustment and the heat supply of the hydraulic module can be effectively balanced.
  • the embodiment of the present application proposes a multi-connection heat pump system.
  • the multi-connected heat pump system includes a compressor 1, at least one hydraulic module 2, at least one air conditioner indoor unit 3 and a control device.
  • the compressor 1, at least one hydraulic module 2, and at least one air conditioner indoor unit 3 are all connected to the control device.
  • the number of air-conditioning indoor units 3 and hydraulic modules 2 is more than one. In other embodiments, the number of air-conditioning indoor units 3 and hydraulic modules 2 can also be set according to actual needs.
  • At least one hydraulic module 2 and at least one air conditioner indoor unit 3 can be arranged in the same space or distributed in different space areas according to actual needs.
  • the different spatial regions here specifically refer to mutually separated spatial regions.
  • the hydraulic module 2 is provided with a water channel and a refrigerant flow channel.
  • a first electronic expansion valve 21 is arranged on the refrigerant flow path to regulate the refrigerant flow in the refrigerant flow path.
  • the refrigerant flow path exchanges heat with the water path to provide heat for the water in the water path.
  • the compressor 1 , the outdoor heat exchanger 4 , the throttling device and the refrigerant flow path in the hydraulic module 2 are sequentially connected to form a refrigerant circulation loop.
  • the inlet and outlet of the refrigerant flow path of the hydraulic module 2 are provided with a first temperature sensor 01 and a second temperature sensor 02 respectively, which are set to detect the first temperature of the refrigerant inlet and the second temperature of the refrigerant outlet of the hydraulic module 2 .
  • the outlet of the water flow path of the hydraulic module 2 is provided with a third temperature sensor 03 to detect the outlet water temperature of the hydraulic module 2 .
  • the hydraulic module 2 can be connected with at least one floor heating module and/or at least one hot water module to provide heat for the floor heating module (such as a capillary floor or a radiator, etc.) and/or the hot water module.
  • the water outlet of the hydraulic module 2 is connected to the water inlet of the floor heating module, the water outlet of the floor heating module is connected to the water inlet of the hydraulic module 2, and the water circuit in the hydraulic module 2 is connected to the floor heating module to form a water circulation loop;
  • the hydraulic module 2 The water outlet of the hot water module is connected to the water inlet of the hot water module, the water outlet of the hot water module is connected to the water inlet of the hydraulic module 2, and the water circuit in the hydraulic module 2 is connected with the hot water module to form a water circulation loop.
  • the air conditioner indoor unit 3 includes an indoor heat exchanger 31 and a second electronic expansion valve 32 connected to the indoor heat exchanger 31 , the second electronic expansion valve can regulate the flow of refrigerant flowing into the indoor heat exchanger 31 .
  • the air-conditioning indoor unit 3 also includes a fan arranged corresponding to the indoor heat exchanger 31, which can drive the indoor air to pass through the indoor heat exchanger 31 for heat exchange and drive the heat-exchanged air into the room.
  • the indoor heat exchanger 31 is provided with a fourth temperature sensor 04 configured to detect the coil temperature of the indoor heat exchanger 31 .
  • the discharge side of the compressor may be provided with a pressure sensor 05, which is configured to detect the discharge pressure of the compressor.
  • the control device of the multi-connected heat pump system includes: a processor 1001 (such as a CPU), a memory 1002, a timer 1003 and the like.
  • the memory 1002 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory.
  • the memory 1002 may also be a storage device independent of the foregoing processor 1001 .
  • the above-mentioned compressor 1, hydraulic module 2, air conditioner indoor unit 3, first temperature sensor 01, second temperature sensor 02, third temperature sensor 03, fourth temperature sensor 04 and pressure sensor 05 can all be connected to the control device here .
  • FIG. 2 does not constitute a limitation to the device, and may include more or less components than shown in the figure, or combine some components, or arrange different components.
  • the memory 1002 which is a kind of computer-readable storage medium, may include the control program of the multi-line heat pump system.
  • the processor 1001 can be configured to call the control program of the multi-connected heat pump system stored in the memory 1002, and execute related steps of the control method of the multi-connected heat pump system in the following embodiments.
  • the embodiment of the present application also provides a control method for a multi-connection heat pump system, which is applied to control the above-mentioned multi-connection heat pump system.
  • control method of the multi-connected heat pump system includes:
  • Step S10 acquiring the first energy demand information of the at least one air-conditioning indoor unit and the second energy demand information of the at least one hydraulic module;
  • the first energy demand information represents the heating capacity demand of the at least one air-conditioning indoor unit situation, the second energy demand information characterizes the heating capacity demand of the at least one hydraulic module;
  • the first energy demand information represents the heating capacity demand of all air conditioner indoor units connected to the compressor
  • the second energy demand information represents the heating capacity demand of all hydraulic modules connected to the compressor.
  • the first energy demand here can be determined based on whether all air-conditioning indoor units are turned on and the temperature attainment of the room temperature when turned on (such as whether the indoor temperature reaches the set temperature, the temperature deviation between the indoor temperature and the set temperature, etc.)
  • the information can be based on whether all hydraulic modules are turned on and the temperature of the water temperature when turned on (such as whether the outlet water temperature reaches the set water temperature, the temperature deviation between the outlet water temperature and the set water temperature, etc.).
  • the first energy demand information here can be characterized by the first energy demand value, and the first energy demand value is greater than the first set value (for example, greater than 0), indicating that the heating capacity required by at least one air-conditioning indoor unit is greater than the first preset value (such as greater than 0W), that is, there is currently an open air-conditioning indoor unit and the room temperature of the operating space of the open air-conditioning indoor unit has not reached the set temperature of the indoor unit; the first energy demand value is less than or equal to the first set value (eg equal to 0) indicates that the heating capacity required by at least one air-conditioning indoor unit is less than or equal to the first preset value (eg equal to 0W), that is, there are currently activated air-conditioning indoor units and the room temperature of the active space of the activated air-conditioning indoor units has reached The set temperature of the indoor unit is reached.
  • the first set value for example, greater than 0
  • the first preset value such as greater than 0W
  • the second energy demand information here can be characterized by a second energy demand value, and the second energy demand value is greater than the second set value (for example, greater than 0) indicating that the heating capacity required by at least one hydraulic module is greater than the second preset value (for example, greater than 0W), that is, there is currently an open hydraulic module and the water temperature (such as the outlet water temperature) of the open hydraulic module does not reach the set water temperature of the hydraulic module; the second energy demand value is less than or equal to the second set value (such as equal to 0) indicates that the heating capacity required by at least one hydraulic module is less than or equal to the second preset value (for example, equal to 0W), that is, there is currently an activated hydraulic module and the water temperature of the activated hydraulic module has reached the set water temperature of the hydraulic module.
  • the second energy demand value is greater than the second set value (for example, greater than 0) indicating that the heating capacity required by at least one hydraulic module is greater than the second preset value (for example, greater than 0W), that is
  • Step S20 adjusting the operating frequency of the compressor according to the target parameters corresponding to the first energy demand information and the second energy demand information.
  • the target parameter here is specifically an adjustment basis for adjusting the operating frequency of the compressor.
  • the target parameter can be the first operating characteristic parameter of the indoor unit of the air conditioner (indoor heat exchanger temperature, the room temperature of the space where the indoor unit is located and/or the speed of the fan in the indoor unit, etc.) and the second operating characteristic parameter of the hydraulic module (such as water temperature, hydraulic power, etc.) One of the electronic expansion valve opening of the module and/or the room temperature of the space where the hydraulic module is located, etc.).
  • the first operating characteristic parameter and the second operating characteristic parameter may be determined as the target parameter according to the first energy demand information and the second energy demand information, and the operating frequency of the compressor may be regulated according to the determined target parameter .
  • the target frequency of the compressor operation can be determined according to the target parameters, and the compressor can be controlled to run at the target frequency; the adjustment direction of the compressor frequency can also be determined according to the target parameters (such as increasing, maintaining the same or decreasing), according to the set The determined adjustment direction adjusts the operating frequency of the compressor.
  • the target parameter may also include the first operating characteristic parameter and the second operating characteristic parameter mentioned above.
  • Different first energy demand information and different second energy demand information may correspond to different first operating characteristic parameters and second operating characteristic parameters.
  • the first operating characteristic parameter and the second operating characteristic parameter and their corresponding first weight value and second weight value can be determined according to the first energy demand information and the second energy demand information, and the first operating characteristic parameter can be determined according to The first frequency, the second frequency is determined according to the second operating characteristic parameter, and the target frequency for compressor operation is calculated according to the first frequency and its corresponding first weight value, the second frequency and its corresponding second weight value, according to the The determined target frequency controls compressor operation.
  • a control method for a multi-connected heat pump system proposed in the embodiment of the present application is based on a multi-connected heat pump system in which a compressor is connected to at least one hydraulic module and at least one air-conditioning indoor unit.
  • the method is based on characterizing the actual needs of the air-conditioning indoor unit and the hydraulic module
  • the first energy demand information and the second energy demand information of the heating capacity determine the corresponding target parameters to regulate the frequency of the compressor, so as to ensure that the output capacity of the compressor can meet the actual heat exchange demand of the indoor unit of the air conditioner and the hydraulic module at the same time, and realize the compression
  • the output capacity of the machine is accurately matched with the actual indoor heat exchange demand, so that the indoor environment temperature adjustment and the heat supply of the hydraulic module can be effectively balanced.
  • step S20 includes:
  • the operation of the compressor is adjusted according to the temperature of the indoor heat exchanger of the currently turned on air-conditioning indoor unit frequency, the target parameters include the indoor heat exchanger temperature;
  • the first energy demand information is when the heating capacity required by at least one air-conditioning indoor unit is greater than the first preset value, that is, when the air-conditioning indoor unit connected to the compressor has energy demand or has a large energy demand, regardless of whether the second energy demand information is Whether the heating capacity required by at least one hydraulic module is greater than the second preset value or is less than or equal to the second preset value, at this time, based on the temperature of the indoor heat exchangers of all air-conditioning indoor units currently turned on or the required heating capacity is greater than the first preset value
  • the temperature of the indoor heat exchanger of the air conditioner indoor unit regulates the operating frequency of the compressor, which is conducive to ensuring that the heat output by the compressor can meet the temperature adjustment requirements of the space where the indoor unit is located and the heating demand of the hydraulic module.
  • the temperature of the indoor heat exchanger can be determined according to the temperature data detected by the temperature sensor installed on the coil of the indoor heat exchanger, or it can be determined according to the operating parameters related to the temperature of the indoor heat exchanger in the outdoor unit (such as the discharge pressure of the compressor and/or Exhaust temperature, etc.)
  • the operating frequency of the compressor is adjusted according to the outlet water temperature of the hydraulic module, and the target parameter includes the outlet water temperature.
  • the temperature of the outlet water can be detected by a temperature sensor arranged at the water outlet of the hydraulic module.
  • the first energy demand information is that the heating capacity required by at least one air conditioner indoor unit is less than or equal to the first preset value
  • the second energy demand information is that the heating capacity required by at least one hydraulic module is greater than the second preset value , that is, the indoor unit of the air conditioner connected to the compressor has no energy demand or the energy demand is small, while the hydraulic module connected to the compressor has energy demand or is relatively large.
  • the frequency is adjusted to ensure that the indoor environment temperature adjustment requirements are met while avoiding excessive heat output by the compressor, avoiding frequent shutdowns of the compressor caused by the outlet water temperature of the hydraulic module reaching the set water temperature, and ensuring the operation stability of the compressor and The continuity of the heat supply of the multi-connected heat pump system.
  • the first energy demand information is a first energy demand value determined based on the heating capacity required by all air-conditioning indoor units
  • the second energy demand information is a second energy demand value determined based on the heating capacity required by all hydraulic modules
  • the control method for the multi-connected heat pump system of the present application is proposed based on the above embodiments.
  • the first energy demand information is that the heating capacity demanded by the at least one air-conditioning indoor unit is greater than a first preset value, according to the currently turned on air-conditioning indoor unit
  • the step of adjusting the operating frequency of the compressor by the temperature of the indoor heat exchanger comprises:
  • Step S21 in response to the fact that the first energy demand information is that the heating capacity demanded by the at least one air conditioner indoor unit is greater than a first preset value, determine a second heat exchanger temperature according to the indoor heat exchanger temperature and the preset heat exchanger temperature. a frequency correction value;
  • the preset heat exchanger temperature specifically refers to a preset target value of the temperature that needs to be reached by the indoor heat exchanger of the air conditioner indoor unit during the heating process.
  • Different indoor heat exchanger temperatures and preset heat exchanger temperatures may correspond to different first frequency correction values.
  • a first correspondence between the temperature of the indoor heat exchanger, the preset temperature of the heat exchanger, and the first frequency correction value is established in advance, and the first correspondence can be a calculation relationship, a mapping relationship, and the like.
  • the current first frequency correction value can be obtained by looking up a table or calculating according to the temperature of the indoor heat exchanger and the preset temperature of the heat exchanger.
  • a first temperature difference value between the indoor heat exchanger temperature and the preset heat exchanger temperature is determined; in response to the first temperature difference value being greater than or equal to the first preset temperature difference
  • the first target correction value is the first frequency correction value
  • the second target correction value is the first frequency correction value
  • the second preset temperature difference is less than or equal to the first preset temperature difference, the first target frequency corresponding to the first target correction value is greater than the initial frequency, and the first target frequency corresponding to the second target correction value
  • the target frequency is less than the initial frequency.
  • the first temperature difference is the difference between the preset heat exchanger temperature M and the indoor heat exchanger temperature N (ie M-N), the first preset temperature difference is greater than 0, and the second preset temperature difference is less than 0 . Based on this, when the first temperature difference value is greater than or equal to the first preset temperature difference, it indicates that the preset heat exchanger temperature is higher than the indoor heat exchanger temperature, and the deviation is large.
  • the first target correction value is used to increase the initial frequency to obtain the first
  • a target frequency is conducive to quickly increasing the actual heat exchange temperature of the indoor unit of the air conditioner to the preset heat exchanger temperature; when the first temperature difference is smaller than the second preset temperature difference, it indicates that the preset heat exchanger temperature is lower than the indoor heat exchanger temperature , and the deviation is large, at this time, the first target frequency is obtained by reducing the initial frequency by the second target correction value.
  • the first temperature difference (°C( X ⁇ -3 -3 ⁇ X ⁇ -2 -2 ⁇ X ⁇ -1 -1 ⁇ X ⁇ 1 1 ⁇ X ⁇ 2 2 ⁇ X ⁇ 3 X ⁇ 3 Frequency correction value (Hz( -5 -2 -1 0 +1 +2 +3
  • 1 in the above table is the above-mentioned first preset temperature
  • -1 in the above table is the above-mentioned second preset temperature
  • Step S22 obtaining a first target frequency after adjusting the initial frequency of the compressor according to the first frequency correction value
  • the initial frequency here can be a preset fixed frequency, or the current operating frequency of the compressor.
  • the initial frequency may be increased, decreased or maintained according to the first frequency correction value to obtain the first target frequency.
  • the first frequency correction value can represent both the frequency correction direction and the frequency correction magnitude, and the sum of the first frequency correction value and the initial frequency can be used as the first target frequency.
  • the first frequency correction value may only represent the frequency correction range, then after determining the frequency adjustment direction according to the indoor heat exchanger temperature and the preset heat exchanger temperature, when the frequency adjustment direction is to reduce the initial frequency, The difference between the initial frequency and the first frequency correction value can be used as the first target frequency; when the frequency adjustment direction is to increase the initial frequency, the sum of the initial frequency and the first frequency correction value can be used as the first target frequency.
  • Step S23 controlling the compressor to run at the first target frequency.
  • the actual heat exchange temperature of the air conditioner indoor unit can maintain the preset heat exchanger temperature.
  • the frequency of the compressor is regulated in the above-mentioned manner to ensure that the heat exchange temperature of the air-conditioning indoor unit can be maintained at the preset heat exchanger temperature , to meet the temperature regulation needs of the indoor environment.
  • the currently opened air conditioner may be obtained in one of the following two ways:
  • the temperature of the indoor heat exchanger of the indoor unit of the air conditioner is used to regulate the frequency of the compressor:
  • Way 1 In response to the fact that the first energy demand information is that the heating capacity required by the at least one air-conditioning indoor unit is greater than a first preset value, obtain the discharge pressure of the compressor; determine according to the discharge pressure The condensing temperature of the currently turned on air conditioner indoor unit, the temperature of the indoor heat exchanger includes the condensing temperature.
  • a quantitative relationship between the exhaust pressure and the condensing temperature may be preset, and based on the quantitative relationship, the condensing temperature of the currently turned on air-conditioning indoor unit is determined through calculation of the exhaust pressure.
  • a mapping table of exhaust pressure and condensing temperature may be preset, and the condensing temperature of the currently turned on air-conditioning indoor unit may be obtained by querying the mapping table through the exhaust pressure.
  • the condensing temperature here represents the temperature value of the comprehensive situation of the saturation temperatures of the indoor heat exchangers of all the indoor air conditioners that are currently turned on during the condensation process.
  • Way 2 In response to the fact that the first energy demand information is that the heating capacity demanded by the at least one air-conditioning indoor unit is greater than a first preset value, obtain the rated heating capacity of the currently turned-on air-conditioning indoor unit and its corresponding indoor heat exchange
  • the coil temperature of the air conditioner; the weight value of each currently turned on air conditioner indoor unit is determined according to the rated heat output; the indoor heat exchanger temperature is determined according to the coil temperature and its corresponding weight value.
  • the rated heat output is n1, n2, n3...nx KW respectively, and the coil temperature of each indoor unit corresponds to T21, T22, T23...T2x°C, then the temperature of the indoor heat exchanger
  • step S10 further comprising: in response to the fact that the first energy demand information indicates that the heating capacity demanded by the at least one air-conditioning indoor unit is greater than a first preset value, acquiring the compression The installation status information of the pressure sensor on the exhaust side of the compressor; in response to the fact that the installation status information is that the pressure sensor is not installed on the exhaust side of the compressor, the temperature of the indoor heat exchanger is obtained according to the above method 1; in response to the The above installation status information refers to the situation that the pressure sensor has been installed on the exhaust side of the compressor, and the temperature of the indoor heat exchanger can be obtained according to the second method above.
  • the installation state information here can be determined by obtaining the instruction input by the user.
  • the response to the first energy demand information is that the heating capacity demanded by the at least one air conditioner indoor unit is less than or equal to the first preset value, and the second energy demand
  • the step of adjusting the operating frequency of the compressor according to the outlet water temperature of the hydraulic module includes:
  • Step S201 in response to the first energy demand information being that the heating capacity required by the at least one air conditioner indoor unit is less than or equal to the first preset value, and the second energy demand information is that the at least one hydraulic module When the required heating capacity is greater than the second preset value, determine the current first condensation temperature of the hydraulic module according to the outlet water temperature;
  • the first condensation temperature here is specifically the saturation temperature of the water output by the hydraulic module during the heat exchange process (such as the saturation temperature of the capillary floor or the radiator during the heat exchange process).
  • the second corresponding relationship between the outlet water temperature and the first condensation temperature can be preset, and can be a calculation formula, a mapping table, and the like. Based on the second corresponding relationship, the outlet water temperature can be calculated or the mapping table can be queried to obtain the first condensation temperature here.
  • Step S202 determining a second frequency correction value according to the first condensing temperature and the target condensing temperature
  • the target condensation temperature is specifically the target value of the preset temperature that the hydraulic module needs to reach during the heating process.
  • Different first condensing temperatures and target condensing temperatures may correspond to different second frequency correction values.
  • a third corresponding relationship among the first condensing temperature, the target condensing temperature, and the second frequency correction value is established in advance, and the third corresponding relationship may be a calculation relationship, a mapping relationship, and the like. Based on the third corresponding relationship, the current second frequency correction value can be obtained by looking up a table or calculating according to the first condensing temperature and the target condensing temperature.
  • a third temperature difference between the target condensation temperature and the second condensation temperature is determined; when the third temperature difference is greater than or equal to a third preset temperature difference, the third temperature difference is determined.
  • the target correction value is the second frequency correction value; when the third temperature difference is less than the fourth preset temperature difference, determine the fourth target correction value as the second frequency correction value; the fourth preset temperature difference is less than or equal to the third preset temperature difference, the second target frequency corresponding to the third target correction value is greater than the initial frequency, and the second target frequency corresponding to the fourth target correction value is less than the initial frequency frequency.
  • the third temperature difference is the difference between the preset heat exchanger temperature P and the indoor heat exchanger temperature Q (ie P-Q), the third preset temperature difference is greater than 0, and the fourth preset temperature difference is less than 0 .
  • the third temperature difference value is greater than or equal to the third preset temperature difference, it indicates that the target condensation temperature is greater than the first condensation temperature, and the deviation is relatively large.
  • the second target frequency is obtained by increasing the initial frequency by the third target correction value, It is conducive to the rapid increase of the actual heat exchange temperature of the hydraulic module to the target condensation temperature; when the third temperature difference is less than the fourth preset temperature difference, it indicates that the target condensation temperature is lower than the first condensation temperature, and the deviation is large.
  • the fourth target is corrected The value reduces the initial frequency to get the second target frequency.
  • the corresponding frequency correction value can be determined according to the following table to adjust the initial frequency of the compressor:
  • the third temperature difference (°C( Y ⁇ -3 -3 ⁇ Y ⁇ -2 -2 ⁇ Y ⁇ -1 -1 ⁇ Y ⁇ 1 1 ⁇ Y ⁇ 2 2 ⁇ Y ⁇ 3 Y ⁇ 3 Frequency correction value (Hz( -5 -2 -1 0 +1 +2 +3
  • 1 in the above table is the above-mentioned third preset temperature
  • -1 in the above table is the above-mentioned fourth preset temperature
  • Step S203 obtaining a second target frequency after adjusting the initial frequency of the compressor according to the second frequency correction value
  • the initial frequency here can be a preset fixed frequency, or the current running frequency of the compressor.
  • the initial frequency may be increased, decreased or maintained according to the second frequency correction value to obtain the second target frequency.
  • the second frequency correction value can represent both the frequency correction direction and the frequency correction magnitude, and the sum of the second frequency correction value and the initial frequency can be used as the second target frequency.
  • the second frequency correction value may only represent the frequency correction range, then after the frequency adjustment direction is determined according to the indoor heat exchanger temperature and the preset heat exchanger temperature, when the frequency adjustment direction is to reduce the initial frequency, The difference between the initial frequency and the second frequency correction value can be used as the second target frequency; when the frequency adjustment direction is to increase the initial frequency, the sum of the initial frequency and the second frequency correction value can be used as the second target frequency.
  • Step S204 controlling the compressor to run at the second target frequency.
  • the frequency of the compressor is regulated according to the above-mentioned method, which can ensure the temperature regulation of the indoor environment While the demand is met, the output capacity of the compressor can match the heat demanded by the hydraulic module, so as to prevent the water temperature of the hydraulic module from reaching the set water temperature too quickly, and effectively prevent the compressor from frequently reaching the temperature and shutting down.
  • the step of determining the current first condensation temperature of the hydraulic module according to the outlet water temperature includes:
  • Step S201a determining a temperature correction value according to the outlet water temperature and the set water temperature of the hydraulic module
  • the set water temperature here is specifically the target value to be achieved by the outlet water temperature of the preset hydraulic module.
  • the set water temperature may be the temperature set by the user, or may be the temperature determined according to the target temperature set by the user for the target object heated by the hydraulic module.
  • the temperature correction value can be obtained by calculating the outlet water temperature and the set water temperature. For example, the difference between the outlet water temperature and the set temperature can be used as the temperature correction value.
  • the temperature correction value can also be obtained by querying the preset mapping table through the outlet water temperature and the set water temperature.
  • a second temperature difference between the set water temperature and the outlet water temperature is determined; a temperature adjustment value is determined according to the second temperature difference; and the setting is adjusted according to the temperature adjustment value.
  • the temperature correction value is obtained after the water temperature is fixed; wherein, the temperature adjustment value shows an increasing trend with the increase of the second temperature difference value, and/or, the temperature adjustment value increases with the decrease of the second temperature difference value A small decreasing trend.
  • the second temperature difference is specifically the difference between the set water temperature and the outlet water temperature; in other embodiments, the second temperature difference may also be the absolute value of the difference between the outlet water temperature and the set water temperature.
  • the second temperature difference value can be directly used as the temperature adjustment value, or the temperature adjustment value can be obtained by calculating the second temperature difference value or looking up a table based on the preset correspondence between the temperature difference and the adjustment value.
  • the variation trend of the outlet water temperature can be obtained, and the corresponding relationship between the temperature difference and the adjustment value can be obtained based on the variation trend of the outlet water temperature. Different variation trends correspond to different corresponding relationships.
  • the temperature adjustment value corresponding to the second temperature difference is determined based on the fourth correspondence, and when the outlet water temperature is decreasing, the temperature adjustment value corresponding to the second temperature difference is determined based on the fifth correspondence. As shown in FIG.
  • the temperature adjustment value corresponding to the outlet water temperature in the fourth correspondence relationship is greater than the temperature adjustment value corresponding to the outlet water temperature in the fifth correspondence relationship.
  • the sum of the set water temperature and the temperature adjustment value is used as the temperature correction value.
  • the difference, product or ratio between the set water temperature and the temperature adjustment value can also be used as the temperature correction value.
  • Step S201b obtaining a reference condensation temperature after correcting the preset condensation temperature according to the temperature correction value
  • the preset condensation temperature is specifically a preset temperature value, which may be a preset fixed value, or may be a temperature selected from multiple preset temperature values according to the current set water temperature of the hydraulic module.
  • the sum of the temperature correction value and the preset condensing temperature can be used as the reference condensing temperature.
  • the difference, product or ratio between the preset condensing temperature and the temperature correction value may also be used as the reference condensing temperature.
  • Step S201c determining the first condensation temperature according to the reference condensation temperature.
  • the reference condensing temperature obtained above can be directly used as the first condensing temperature, or the result after being corrected according to the preset fixed correction value can be used as the first condensing temperature, and the reference condensing temperature and the preset temperature interval can also be used Compared with the critical value, if the reference condensing temperature is within the preset temperature range, the reference condensing temperature can be directly used as the first condensing temperature; if the reference condensing temperature is outside the preset temperature range, the critical value of the preset temperature range can be used as the second - condensation temperature.
  • the preset temperature range can be a first temperature range, a second temperature range or a third temperature range
  • the first temperature range is a temperature range with a minimum critical value but not a maximum critical value
  • the second temperature range is a temperature range with a maximum critical value but not a maximum critical value.
  • the temperature interval does not have a minimum critical value
  • the third temperature interval is a temperature interval with both a minimum critical value and a maximum critical value.
  • the first condensing temperature is Tw_cH
  • Tw-out is the outlet water temperature
  • Tw_cH0 is the preset condensing temperature (default 45°C, recommended value 40452°C)
  • T1S is the set water temperature
  • k is the temperature correction value
  • C is the preset constant (default 45°C, recommended value 35450°C)
  • ⁇ TWS is the second temperature difference value
  • ⁇ Trs is an intermediate parameter determined based on ⁇ TWS.
  • ⁇ Trs corresponding to ⁇ TWS is determined based on FIG. 2 , then k is calculated by ⁇ Trs and formula (2), and the first condensation temperature is further calculated by formula (1).
  • the first condensing temperature is obtained after correcting the preset condensing temperature with the temperature correction value determined by combining the outlet water temperature of the hydraulic module and the set temperature, which can ensure that the obtained first condensing temperature can accurately represent the current hydraulic module To ensure the accuracy of compressor frequency regulation based on the determined first condensing temperature, to ensure that the output capacity of the compressor matches the actual heating demand of the hydraulic module, and to effectively avoid frequent shutdowns of the compressor .
  • the above-mentioned process of determining the first condensing temperature according to the reference condensing temperature is specifically as follows: in response to the reference condensing temperature being within a preset temperature range, the reference condensing temperature is the A first condensation temperature; in response to the reference condensation temperature being less than a minimum critical value of the preset temperature range, the minimum critical value being the first condensation temperature; in response to the reference condensation temperature being greater than the preset temperature A maximum critical value of the interval, where the maximum critical value is the first condensation temperature.
  • the maximum critical value and the minimum critical value may be preset fixed temperature values, or may be parameter values determined according to the current operating conditions of the multi-connected heat pump system.
  • the recommended minimum critical value of the preset temperature range is 30°C, and the range is 25435°C.
  • the value of the first condensing temperature is limited by the preset temperature range, which can prevent the operating frequency of the compressor from being too high or too low due to the first condensing temperature being too high or too low, so as to ensure reliable and stable operation of the compressor.
  • the step of determining the first condensing temperature according to the reference condensing temperature it also includes: acquiring the outdoor ambient temperature and the current operating frequency of the compressor; The operating frequency determines the maximum threshold. Different outdoor ambient temperatures and different operating frequencies correspond to different maximum critical values.
  • the maximum critical value is obtained by querying a preset mapping table through the outdoor ambient temperature and operating frequency. In other embodiments, the maximum critical value here can also be obtained by calculating the outdoor ambient temperature, operating frequency and a preset formula.
  • the maximum critical value can be obtained by querying the following table through the outdoor ambient temperature T4 and compressor frequency F:
  • the maximum critical value of the first condensing temperature is determined in combination with the outdoor ambient temperature and the current operating frequency of the compressor, so that the first condensing temperature is limited based on the maximum critical value, ensuring that the operating frequency of the compressor can be adjusted according to the first condensing temperature. Further improve the reliability and stability of compressor operation.
  • the response to the first energy demand information is that the heating capacity demanded by the at least one air conditioner indoor unit is less than or equal to the first preset value, and the second energy demand
  • the step of adjusting the operating frequency of the compressor according to the outlet water temperature of the hydraulic module includes:
  • Step S210 in response to the first energy demand information being that the heating capacity required by the at least one air conditioner indoor unit is less than or equal to the first preset value, and the second energy demand information being that the at least one hydraulic module When the required heating capacity is greater than the second preset value, the third target frequency is determined according to the first target temperature difference, the second target temperature difference, the outlet water temperature, and the set water temperature of the hydraulic module;
  • Step S220 controlling the compressor to run at the third target frequency.
  • the first target temperature difference is the temperature difference between the first actual condensing temperature and the set condensing temperature of the hydraulic module at the current moment
  • the second target temperature difference is the last adjustment based on the outlet water temperature of the hydraulic module.
  • the temperature difference between the second actual condensing temperature of the hydraulic module and the set condensing temperature at the frequency of the compressor, the first actual condensing temperature is the parameter corresponding to the outlet water temperature, and the second actual condensing temperature is the set Describe the parameters corresponding to the outlet water temperature.
  • the outlet water temperature here is equivalent to the outlet water temperature at the corresponding moment.
  • the process of determining the first actual condensing temperature and the second actual condensing temperature may refer to the above-mentioned determining process of the first condensing temperature by analogy, which will not be repeated here.
  • the set condensation temperature here is specifically the target value to be achieved by the preset first condensation temperature.
  • step S10, step S210 and step S220 can be executed cyclically, based on which, in response to the first energy demand information, the heating capacity demanded by the at least one air-conditioning indoor unit is less than or equal to the first preset value, and
  • the second energy demand information is the situation that the heating capacity required by the at least one hydraulic module is greater than the second preset value, and the current third target frequency is combined with the first actual condensing temperature of the hydraulic module and the set value during the cycle
  • the temperature difference between the condensing temperatures and the temperature difference between the second actual condensing temperature of the hydraulic module and the set condensing temperature during the last third target frequency are determined.
  • the preset corresponding relationship between the first target temperature difference, the second target temperature difference, the outlet water temperature and the set water temperature and the third target frequency can be preset.
  • the preset corresponding relationship may be a calculation formula, a mapping table, and the like.
  • the third target frequency here can be obtained by calculating and/or looking up a table through the first target temperature difference, the second target temperature difference, the outlet water temperature and the set water temperature.
  • the third temperature difference between the first target temperature difference and the second target temperature difference is determined, and the fourth temperature difference between the set water temperature and the outlet water temperature is determined; according to the The third temperature difference value and the fourth temperature difference value determine a target frequency adjustment value; the third target frequency is obtained after adjusting the current operating frequency of the compressor according to the target frequency adjustment value; wherein, the third target frequency varies with The increase of the third temperature difference shows an increasing trend, and the third target frequency shows an increasing trend with the increase of the fourth temperature difference.
  • the third target frequency has a decreasing trend with the decrease of the third temperature difference value
  • the third target frequency has a decreasing trend with the decrease of the fourth temperature difference value.
  • the third temperature difference is the difference between the first target temperature difference and the second target temperature difference
  • the fourth temperature difference is the difference between the set water temperature and the outlet water temperature.
  • the third temperature difference may be the absolute value of the difference between the first target temperature difference and the second target temperature difference
  • the fourth temperature difference may be the absolute value of the difference between the set water temperature and the outlet water temperature.
  • the third target frequency Fr+ ⁇ F, where Fr is the current operating frequency of the compressor.
  • step S20 while or after step S20 is executed, it also includes:
  • Step S30 adjusting the opening degree of the first electronic expansion valve of the air-conditioning indoor unit, so that the temperature difference between the actual heat exchange temperature of the air-conditioning indoor unit and the first target heat exchange temperature is smaller than the first set temperature difference; and/or , adjust the opening degree of the second electronic expansion valve of the hydraulic module, so that the temperature difference between the actual heat exchange temperature of the hydraulic module and the second target heat exchange temperature is smaller than the second set temperature difference; wherein, according to the first The energy demand information and the second energy demand information determine the first target heat exchange temperature and/or the second target heat exchange temperature.
  • the first target heat exchange temperature here is the temperature of the currently turned-on air-conditioning indoor unit mentioned in the above embodiment.
  • Indoor heat exchanger temperature when the first energy demand information is that the heating capacity required by the at least one air conditioner indoor unit is less than or equal to the first preset value, and the second energy demand information is the at least one
  • the second target heat exchange temperature here is the first condensation temperature mentioned in the above embodiment.
  • the actual heat exchange temperature of the air conditioner indoor unit specifically refers to the coil temperature of the indoor heat exchanger; the actual heat exchange temperature of the hydraulic module is determined according to the temperature of the refrigerant flow path of the hydraulic module.
  • the first electronic expansion valve of each air-conditioning indoor unit is individually regulated based on its actual heat exchange temperature.
  • the opening is adjusted in different ways, so that the actual heat exchange temperature of each air-conditioning indoor unit can reach the first target heat exchange temperature;
  • the second electronic expansion valve of each hydraulic module is based on The actual heat exchange temperature is adjusted separately, and the opening of the corresponding second electronic expansion valve is adjusted in different ways if the actual heat exchange temperature is different, so that the actual heat exchange temperature of each hydraulic module can reach the second target heat exchange temperature.
  • the electronic expansion valves of the air-conditioning indoor units and hydraulic modules are regulated according to the above-mentioned method, which can ensure the refrigerant balance obtained by each indoor unit and hydraulic module, and ensure that the indoor environment temperature adjustment requirements meet the heating requirements of the hydraulic modules at the same time. It is also beneficial to further improve the energy efficiency of the system.
  • the first electronic expansion valve can be regulated according to the following process: obtain the current first heat exchange temperature of the air conditioner indoor unit; Determine the first opening adjustment value; adjust the opening of the first electronic expansion valve according to the first opening adjustment value; wherein, the first opening adjustment value increases with the increase of the first deviation value showing an increasing trend.
  • the coil temperature of the indoor heat exchanger in the indoor unit of the air conditioner may be acquired as the first heat exchange temperature here.
  • the first opening adjustment value here may be determined according to the difference or ratio between the first heat exchange temperature and the first target heat exchange temperature. When the first opening adjustment value is less than 0, reduce the opening of the first electronic expansion valve according to the first opening adjustment value; when the first opening adjustment value is greater than 0, increase the first electronic expansion valve opening according to the first opening adjustment value valve opening.
  • the second electronic expansion valve can be regulated according to the following process: obtain the first temperature of the refrigerant inlet of the hydraulic module and the second temperature of the refrigerant outlet of the hydraulic module; Determine the second heat exchange temperature of the hydraulic module; determine a second opening adjustment value according to a second deviation value between the second heat exchange temperature and the second target heat exchange temperature; adjust the second opening degree according to the second opening degree
  • the opening degree of the second electronic expansion valve is adjusted by a value; wherein, the second opening degree adjustment value tends to increase with the increase of the second deviation value.
  • the average value of the difference between the first temperature and the second temperature is used as the second heat exchange temperature to represent the equivalent coil temperature of the water circuit in the hydraulic module.
  • the minimum value of the first temperature and the second temperature or the difference between the first temperature and the second temperature may also be used as the second heat exchange temperature.
  • the second opening adjustment value here may be determined according to the difference or ratio between the second heat exchange temperature and the second target heat exchange temperature. When the second opening adjustment value is less than 0, reduce the second electronic expansion valve opening according to the second opening adjustment value; when the second opening adjustment value is greater than 0, increase the second electronic expansion valve opening according to the second opening adjustment value valve opening.
  • a new first opening adjustment value and/or The new second opening adjustment value adjusts the corresponding opening value of the electronic expansion valve.
  • the corresponding opening adjustment can be determined according to the following mapping table value:
  • the corresponding second electronic expansion valve When the second heat exchange temperature is lower than the second target heat exchange temperature and the temperature deviation between the two temperatures is greater than the threshold 3, the corresponding second electronic expansion valve operates with an increased opening and the opening adjustment increases with the temperature deviation It shows an increasing trend; when the second heat exchange temperature is greater than the second target heat exchange temperature and the temperature deviation between the two temperatures is greater than the threshold 4, the corresponding second electronic expansion valve operates with a reduced opening and the opening adjustment varies with The temperature deviation increases with increasing trend.
  • the embodiment of the present application also proposes a computer-readable storage medium, the computer-readable storage medium stores a control program of a multi-connection heat pump system, and when the control program of the multi-connection heat pump system is executed by a processor, the above Relevant steps of any embodiment of the control method for a multi-connected heat pump system.

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Abstract

本申请公开了一种多联机热泵系统的控制方法，多联机热泵系统包括压缩机、至少一个水力模块和至少一个空调室内机，至少一个水力模块和至少一个空调室内机均与压缩机连接，该方法包括：获取至少一个空调室内机的第一能需信息和至少一个水力模块的第二能需信息；第一能需信息表征至少一个空调室内机的制热量需求情况，第二能需信息表征至少一个水力模块的制热量需求情况；根据第一能需信息和第二能需信息对应的目标参数调整压缩机运行频率。本申请还公开了一种多联机热泵系统和计算机可读存储介质。

Description

多联机热泵系统及其控制方法、计算机可读存储介质
相关申请
本申请要求于2021年9月27号申请的、申请号为202111137871.4的中国专利申请的优先权，其全部内容通过引用结合于此。
技术领域
本申请涉及多联机热泵系统技术领域，尤其涉及多联机热泵系统的控制方法、多联机热泵系统和计算机可读存储介质。
背景技术
随着经济技术的发展，多联机热泵系统在日常生活中的应用越来越广泛。例如，空气源热泵增加水力模块，对毛细管地板辐射采暖、暖气片采暖等，也可向生活用水的储水箱提供热源。
目前，在室内设有风管内机和水力模块的多联机系统中，一般按照预设设置的固定排气压力或风管内机的盘管中部温度为目标进行室外压缩机的运行频率进行调控，容易使压缩机输出能力与室内实际换热需求不匹配，导致室内环境温度调节与水力模块热量供应无法有效兼顾。
申请内容
本申请的主要目的在于提供一种多联机热泵系统的控制方法、多联机热泵系统以及计算机可读存储介质，旨在实现压缩机的输出能力与室内实际换热需求精准匹配，使室内环境温度调节与水力模块热量供应有效兼顾。
为实现上述目的，本申请提供一种多联机热泵系统的控制方法，所述多联机热泵系统包括压缩机、至少一个水力模块和至少一个空调室内机，所述至少一个水力模块和所述至少一个空调室内机均与所述压缩机连接，所述多联机热泵系统的控制方法包括以下步骤：
获取所述至少一个空调室内机的第一能需信息和所述至少一个水力模块的第二能需信息；所述第一能需信息表征所述至少一个空调室内机的制热量需求情况，所述第二能需信息表征所述至少一个水力模块的制热量需求情况；
根据所述第一能需信息和所述第二能需信息对应的目标参数调整压缩机运行频率。
在一实施方式中，所述根据所述第一能需信息和所述第二能需信息对应的目标参数调整压缩机运行频率的步骤包括：
响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率，所述目标参数包括所述室内换热器温度；
响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据所述水力模块的出水温度调整所述压缩机的运行频率，所述目标参数包括所述出水温度。
在一实施方式中，所述响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率的步骤包括：
根据所述室内换热器温度与预设换热器温度确定第一频率修正值；
根据所述第一频率修正值调整所述压缩机的初始频率后获得第一目标频率；
控制所述压缩机以所述第一目标频率运行。
在一实施方式中，所述根据所述室内换热器温度与预设换热器温度确定第一频率修正值的步骤包 括：
确定所述预设换热器温度与所述室内换热器温度之间的第一温差值；
响应于所述第一温差值大于或等于第一预设温差的情形，第一目标修正值为所述第一频率修正值；
响应于所述第一温差值小于第二预设温差时的情形，第二目标修正值为所述第一频率修正值；
所述第二预设温差小于或等于所述第一预设温差，所述第一目标修正值对应的所述第一目标频率大于所述初始频率，所述第二目标修正值对应的所述第一目标频率小于所述初始频率。
在一实施方式中，所述根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率的步骤之前，还包括：
响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，获取所述压缩机的排气压力；
根据所述排气压力确定当前开启的空调室内机的冷凝温度，所述室内换热器温度包括所述冷凝温度；
或，响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，获取当前开启的空调室内机额定制热量及其对应的室内换热器的盘管温度；
根据所述额定制热量确定当前开启的每个空调室内机的权重值；
根据所述盘管温度及其对应的权重值确定所述室内换热器温度。
在一实施方式中，所述获取所述至少一个空调室内机的第一能需信息和所述至少一个水力模块的第二能需信息的步骤之后，还包括：
响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，获取所述压缩机排气侧的压力传感器的安装状态信息；
响应于所述安装状态信息为所述压缩机排气侧未安装所述压力传感器的情形，执行所述获取所述压缩机的排气温度的步骤以及所述根据所述排气温度确定当前开启的空调室内机的冷凝温度的步骤；
响应于所述安装状态信息为所述压缩机排气侧已安装所述压力传感器的情形，执行所述获取当前开启的空调室内机额定制热量及其对应的室内换热器的盘管温度的步骤、所述根据所述额定制热量确定当前开启的每个空调室内机的权重值的步骤以及所述根据所述盘管温度及其对应的权重值确定所述室内换热器温度的步骤。
在一实施方式中，所述当所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值时，根据所述水力模块的出水温度调整所述压缩机的运行频率的步骤包括：
根据所述出水温度确定所述水力模块当前的第一冷凝温度；
根据所述第一冷凝温度和目标冷凝温度确定第二频率修正值；
根据所述第二频率修正值调整所述压缩机的初始频率后获得第二目标频率；
控制所述压缩机以所述第二目标频率运行。
在一实施方式中，所述根据所述出水温度确定所述水力模块当前的第一冷凝温度的步骤包括：
根据所述出水温度与所述水力模块的设定水温确定温度修正值；
根据所述温度修正值修正预设冷凝温度后获得参考冷凝温度；
根据所述参考冷凝温度确定所述第一冷凝温度。
在一实施方式中，所述根据所述出水温度与所述水力模块的设定水温确定温度修正值的步骤包括：
确定所述设定水温与所述出水温度之间的第二温差值；
根据所述第二温差值确定温度调整值；
根据所述温度调整值调整所述设定水温后获得所述温度修正值；
其中，所述温度调整值随所述第二温差值的增大呈增大趋势，且/或，所述温度调整值随所述第二温差值的减小呈减小趋势。
在一实施方式中，所述根据所述参考冷凝温度确定所述第一冷凝温度的步骤包括：
响应于所述参考冷凝温度位于预设温度区间内的情形，所述参考冷凝温度为所述第一冷凝温度；
响应于所述参考冷凝温度小于所述预设温度区间的最小临界值的情形，所述最小临界值为所述第一冷凝温度；
响应于所述参考冷凝温度大于所述预设温度区间的最大临界值的情形，所述最大临界值为所述第一冷凝温度。
在一实施方式中，所述根据所述参考冷凝温度确定所述第一冷凝温度的步骤之前，还包括：
获取室外环境温度和所述压缩机当前的运行频率；
根据所述室外环境温度和所述运行频率确定所述最大临界值。
在一实施方式中，所述根据所述第一冷凝温度和目标冷凝温度确定第二频率修正值的步骤包括：
确定所述目标冷凝温度与所述第二冷凝温度之间的第三温差值；
响应于所述第三温差值大于或等于第三预设温差的情形，第三目标修正值为所述第二频率修正值；
响应于所述第三温差值小于第四预设温差的情形，第四目标修正值为所述第二频率修正值；
所述第四预设温差小于或等于所述第三预设温差，所述第三目标修正值对应的所述第二目标频率大于所述初始频率，所述第四目标修正值对应的所述第二目标频率小于所述初始频率。
在一实施方式中，所述响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据所述水力模块的出水温度调整所述压缩机的运行频率的步骤包括：
根据第一目标温差、第二目标温差、所述出水温度以及所述水力模块的设定水温确定第三目标频率；
控制所述压缩机以所述第三目标频率运行。
其中，所述第一目标温差为当前时刻所述水力模块的第一实际冷凝温度与设定冷凝温度之间的温差值，所述第二目标温差为上一次根据所述水力模块的出口水温调整压缩机频率时所述水力模块的第二实际冷凝温度与设定冷凝温度之间的温差值，所述第一实际冷凝温度为所述出水温度对应的参数，所述第二实际冷凝温度为所述出口水温对应的参数。
在一实施方式中，所述根据第一目标温差、第二目标温差、所述出水温度以及所述水力模块的设定水温确定第三目标频率的步骤包括：
确定所述第一目标温差与所述第二目标温差之间的第三温差值，确定所述设定水温与所述出水温度之间的第四温差值；
根据所述第三温差值和所述第四温差值确定目标频率调整值；
根据所述目标频率调整值调整所述压缩机当前运行频率后得到所述第三目标频率；
其中，所述第三目标频率随所述第三温差值的增大呈增大趋势，所述第三目标频率随所述第四温差值的增大呈增大趋势。
在一实施方式中，所述根据所述第一能需信息和所述第二能需信息对应的目标参数调整压缩机运行频率的步骤执行的同时或之后，还包括：
调节所述空调室内机的第一电子膨胀阀的开度，以使所述空调室内机的实际换热温度与第一目标换热温度的温差小于第一设定温差；
且/或，调节所述水力模块的第二电子膨胀阀的开度，以使所述水力模块的实际换热温度与第二目标换热温度的温差小于第二设定温差；
其中，根据所述第一能需信息和所述第二能需信息确定所述第一目标换热温度和/或所述第二目标换热温度。
在一实施方式中，所述调节所述空调室内机的第一电子膨胀阀的开度的步骤包括：
获取所述空调室内机当前的第一换热温度；
根据所述第一换热温度与所述第一目标换热温度的第一偏差值确定第一开度调整值；
根据所述第一开度调整值调节所述第一电子膨胀阀的开度；
其中，所述第一开度调整值随所述第一偏差值的增大呈增大趋势。
在一实施方式中，所述调节所述水力模块的第二电子膨胀阀的开度的步骤包括：
获取所述水力模块冷媒入口的第一温度和所述水力模块冷媒出口的第二温度；
根据所述第一温度和所述第二温度确定所述水力模块的第二换热温度；
根据所述第二换热温度与所述第二目标换热温度的第二偏差值确定第二开度调整值；
根据所述第二开度调整值调节所述第二电子膨胀阀的开度；
其中，所述第二开度调整值随所述第二偏差值的增大呈增大趋势。
此外，为了实现上述目的，本申请还提出一种多联机热泵系统，所述多联机热泵系统包括：
压缩机；
至少一个水力模块；
至少一个空调室内机，所述至少一个水力模块和所述至少一个空调室内机均与所述压缩机连接；
控制装置，所述压缩机、所述至少一个水力模块和所述至少一个空调室内机均与所述控制装置连接，所述控制装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的多联机热泵系统的控制程序，所述多联机热泵系统的控制程序被所述处理器执行时实现如上任一项所述的多联机热泵系统的控制方法的步骤。
此外，为了实现上述目的，本申请还提出一种计算机可读存储介质，所述计算机可读存储介质上存储有多联机热泵系统的控制程序，所述多联机热泵系统的控制程序被处理器执行时实现如上任一项所述的多联机热泵系统的控制方法的步骤。
本申请提出的一种多联机热泵系统的控制方法，基于一个压缩机连接至少一个水力模块以及至少一个空调室内机的多联机热泵系统，该方法基于表征空调室内机和水力模块实际需求的制热量的第一能需信息和第二能需信息确定对应的目标参数对压缩机频率进行调控，从而保证压缩机输出能力可同时满足空调室内机与水力模块的实际换热量需求，实现压缩机的输出能力与室内实际换热需求精准匹配，使室内环境温度调节与水力模块热量供应有效兼顾。
附图说明
图1为本申请多联机热泵系统的结构示意图；
图2为本申请多联机热泵系统的一实施例运行涉及的硬件结构示意图；
图3为本申请多联机热泵系统的控制方法一实施例的流程示意图；
图4为本申请多联机热泵系统的控制方法另一实施例的流程示意图；
图5为本申请多联机热泵系统的控制方法又一实施例的流程示意图；
图6为图5中实施例涉及的第二温差值与温度调整值的数值关系图；
图7为本申请多联机热泵系统的控制方法再一实施例的流程示意图；
图8为本申请多联机热泵系统的控制方法再另一实施例的流程示意图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
本申请实施例的主要解决方案是：基于多联机热泵系统提出一种控制方法，所述多联机热泵系统 包括压缩机、至少一个水力模块和至少一个空调室内机，所述至少一个水力模块和所述至少一个空调室内机均与所述压缩机连接，该方法包括：获取所述至少一个空调室内机的第一能需信息和所述至少一个水力模块的第二能需信息；所述第一能需信息表征所述至少一个空调室内机的制热量需求情况，所述第二能需信息表征所述至少一个水力模块的制热量需求情况；根据所述第一能需信息和所述第二能需信息对应的目标参数调整压缩机运行频率。
由于现有技术中，在室内设有风管内机和水力模块的多联机系统中，一般按照预设设置的固定排气压力或风管内机的盘管中部温度为目标进行室外压缩机的运行频率进行调控，容易使压缩机输出能力与室内实际换热需求不匹配，导致压缩机频繁停机。
本申请提供上述的解决方案，旨在实现压缩机的输出能力与室内实际换热需求精准匹配，使室内环境温度调节与水力模块热量供应有效兼顾。
本申请实施例提出一种多联机热泵系统。
在本申请实施例中，参照图1和图2，多联机热泵系统包括压缩机1、至少一个水力模块2、至少一个空调室内机3以及控制装置。压缩机1、至少一个水力模块2、至少一个空调室内机3均与控制装置连接。
在本实施例中，空调室内机3和水力模块2的数量均多于一个，在其他实施例中，空调室内机3和水力模块2的数量也可根据实际需求进行设置。
至少一个水力模块2和至少一个空调室内机3可根据实际需求设于相同的空间或分布设于不同的空间区域。这里不同的空间区域具体指的是相互分隔的空间区域。
水力模块2设有水路和冷媒流路。冷媒流路上设有第一电子膨胀阀21，以对冷媒流路中的冷媒流量进行调控。冷媒流路与水路换热，以为水路中的水供热。压缩机1、室外换热器4、节流装置和水力模块2中的冷媒流路依次连通形成冷媒循环回路。其中，水力模块2的冷媒流路的进出口分别设有第一温度传感器01和第二温度传感器02，设置为检测水力模块2冷媒进口的第一温度和冷媒出口的第二温度。水力模块2的水流路的出口设有第三温度传感器03，以检测水力模块2的出水温度。
在本实施例中，水力模块2可与至少一个地暖模块和/或至少一个热水模块连接，以为地暖模块(如毛细管地板或暖气片等)和/或热水模块供热。具体的，水力模块2的出水端与地暖模块的进水端连接，地暖模块的出水端与水力模块2的进水端连接，水力模块2内的水路与地暖模块连通形成水循环回路；水力模块2的出水端与热水模块的进水端连接，热水模块的出水端与水力模块2的进水端连接，水力模块2内的水路与热水模块连通形成水循环回路。
空调室内机3包括室内换热器31与室内换热器31连接的第二电子膨胀阀32，第二电子膨胀阀可对流入室内换热器31的冷媒流量进行调节。空调室内机3还包括对应室内换热器31设置的风机，风机可驱动室内空气经过室内换热器31进行换热并驱动换热后的空气送入室内。室内换热器31上设有第四温度传感器04，设置为检测室内换热器31的盘管温度。
压缩机的排气侧可设有压力传感器05，设置为检测压缩机的排气压力。
在本申请实施例中，参照图2，多联机热泵系统的控制装置包括：处理器1001(例如CPU)，存储器1002，计时器1003等。存储器1002可以是高速RAM存储器，也可以是稳定的存储器(non-volatile memory)，例如磁盘存储器。存储器1002可选的还可以是独立于前述处理器1001的存储装置。
上述的压缩机1、水力模块2、空调室内机3、第一温度传感器01、第二温度传感器02、第三温度传感器03、第四温度传感器04以及压力传感器05均可与这里的控制装置连接。
本领域技术人员可以理解，图2中示出的装置结构并不构成对装置的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
如图2所示，作为一种计算机可读存储介质的存储器1002中可以包括多联机热泵系统的控制程 序。在图2所示的装置中，处理器1001可以被配置为调用存储器1002中存储的多联机热泵系统的控制程序，并执行以下实施例中多联机热泵系统的控制方法的相关步骤操作。
本申请实施例还提供一种多联机热泵系统的控制方法，应用于对上述多联机热泵系统进行控制。
参照图3，提出本申请多联机热泵系统的控制方法一实施例。在本实施例中，所述多联机热泵系统的控制方法包括：
步骤S10，获取所述至少一个空调室内机的第一能需信息和所述至少一个水力模块的第二能需信息；所述第一能需信息表征所述至少一个空调室内机的制热量需求情况，所述第二能需信息表征所述至少一个水力模块的制热量需求情况；
需要说明的是，第一能需信息表征的是与压缩机连接的所有空调室内机的制热量需求情况，第二能需信息表征的是与压缩机连接的所有水力模块的制热量需求情况。
具体的，可基于所有空调室内机是否开启和开启时室温的达温情况(如室内温度是否达到设定温度、室内温度与设定温度之间的温度偏差等)等确定这里的第一能需信息，可基于所有水力模块是否开启和开启时水温的达温情况(如出水温度是否达到设定水温、出水温度与设定水温之间的温度偏差等)。
其中，这里的第一能需信息可通过第一能需值进行表征，第一能需值大于第一设定值(如大于0)表明至少一个空调室内机需求的制热量大于第一预设值(如大于0W)，也就是当前存在开启的空调室内机且开启的空调器室内机作用空间的室温未达到该室内机的设定温度；第一能需值小于或等于第一设定值(如等于0)表明至少一个空调室内机需求的制热量小于或等于第一预设值(如等于0W)，也就是当前存在开启的空调室内机且开启的空调器室内机作用空间的室温已达到该室内机的设定温度。这里的第二能需信息可通过第二能需值进行表征，第二能需值大于第二设定值(如大于0)表明至少一个水力模块需求的制热量大于第二预设值(如大于0W)，也就是当前存在开启的水力模块且开启的水力模块的水温(如出水温度)未达到该水力模块的设定水温；第二能需值小于或等于第二设定值(如等于0)表明至少一个水力模块需求的制热量小于或等于第二预设值(如等于0W)，也就是当前存在开启的水力模块且开启的水力模块的水温已达到该水力模块的设定水温。
步骤S20，根据所述第一能需信息和所述第二能需信息对应的目标参数调整压缩机运行频率。
这里的目标参数具体为用于调控压缩机运行频率的调控依据。
不同的第一能需信息和不同的第二能需信息对应不同的目标参数。目标参数可为空调室内机的第一运行特征参数(室内换热器温度、室内机所在空间的室温和/或室内机中风机转速等)和水力模块的第二运行特征参数(如水温、水力模块的电子膨胀阀开度和/或水力模块所在空间的室温等)中之一。具体的，可根据第一能需信息和第二能需信息确定第一运行特征参数和第二运行特征参数中其中一种作为目标参数，根据所确定的目标参数对压缩机的运行频率进行调控。具体的，可根据目标参数确定压缩机运行的目标频率，控制压缩机以目标频率运行；也可根据目标参数确定压缩机频率的调节方向(如增大、维持不变或减小)，按照所确定的调节方向对压缩机运行频率进行调节。
在其他实施例中，目标参数也可包括上述的第一运行特征参数和第二运行特征参数。不同的第一能需信息和不同的第二能需信息可对应不同的第一运行特征参数和第二运行特征参数。基于此，可根据第一能需信息和第二能需信息确定第一运行特征参数和第二运行特征参数及其分别对应的第一权重值和第二权重值，根据第一运行特征参数确定第一频率，根据第二运行特征参数确定第二频率，根据第一频率及其对应的第一权重值、第二频率及其对应的第二权重值计算得到压缩机运行的目标频率，按照所确定的目标频率控制压缩机运行。
本申请实施例提出的一种多联机热泵系统的控制方法，基于一个压缩机连接至少一个水力模块以及至少一个空调室内机的多联机热泵系统，该方法基于表征空调室内机和水力模块实际需求的制热量的第一能需信息和第二能需信息确定对应的目标参数对压缩机频率进行调控，从而保证压缩机输出能力可同时满足空调室内机与水力模块的实际换热量需求，实现压缩机的输出能力与室内实际换热需求精准匹 配，使室内环境温度调节与水力模块热量供应有效兼顾。
进一步的，在上述实施例中，步骤S20包括：
响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率，所述目标参数包括所述室内换热器温度；
第一能需信息为至少一个空调室内机需求的制热量大于第一预设值时，也就是压缩机所连接的空调室内机有能需或能需较大时，无论第二能需信息为至少一个水力模块需求的制热量大于第二预设值还是为小于或等于第二预设值，此时基于当前开启所有空调室内机的室内换热器温度或需求制热量大于第一预设值的空调室内机的室内换热器温度对压缩机的运行频率进行调控，有利于保证压缩机输出的热量同时满足具有能力需求的室内机所在空间的温度调节需求以及水力模块的供热需求。
室内换热器温度可根据设于室内换热器盘管的温度传感器检测的温度数据确定，也可根据室外机中与室内换热器温度相关运行参数(如压缩机的排气压力和/或排气温度等)确定。
响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据所述水力模块的出水温度调整所述压缩机的运行频率，所述目标参数包括所述出水温度。
出水温度具体可通过设于水力模块出水口的温度传感器检测得到。
响应于第一能需信息为至少一个空调室内机需求的制热量小于或等于第一预设值时，且第二能需信息为至少一个水力模块需求的制热量大于第二预设值的情形，也就是压缩机所连接的空调室内机没有能需或能需较小、而压缩机所连接的水力模块有能需或能需较大，此时通过水力模块的出水温度对压缩机的运行频率进行调控，可保证室内环境温度调节需求满足的同时避免压缩机输出的热量过大，避免水力模块的出水温度频繁达到设定水温而导致压缩机频繁达温停机，保证压缩机运行稳定性和多联机热泵系统热量供应的持续性。
在其他实施例中，第一能需信息为基于所有空调室内机所需制热量确定的第一能需值，第二能需信息为基于所有水力模块所需制热量确定的第二能需值，当第一能需值大于第二能需值时，可确定上述室内换热器温度目标参数，并按照室内换热器温度对压缩机运行频率进行调控；在第一能需值小于或等于第二能需值时，可确定水力模块的出水温度作为目标参数，按照水力模块的出水温度对压缩机的运行频率进行调控。
进一步的，基于上述实施例，提出本申请多联机热泵系统的控制方法另一实施例。在本实施例中，参照图4，所述响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率的步骤包括：
步骤S21，响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，根据所述室内换热器温度与预设换热器温度确定第一频率修正值；
这里的预设换热器温度具体为预先设置的空调室内机的室内换热器在制热过程中所需达到温度的目标值。
不同的室内换热器温度和预设换热器温度可对应有不同的第一频率修正值。预先建立室内换热器温度、预设换热器温度以及第一频率修正值之间的第一对应关系，该第一对应关系可为计算关系、映射关系等。基于该第一对应关系，可根据室内换热器温度和预设换热器温度可查表、计算等方式得到当前的第一频率修正值。
具体的，在本实施例中，确定所述室内换热器温度与所述预设换热器温度之间的第一温差值；响应于所述第一温差值大于或等于第一预设温差的情形，第一目标修正值为所述第一频率修正值；响应于所述第一温差值小于第二预设温差的情形，第二目标修正值为所述第一频率修正值；所述第二预设温差 小于或等于所述第一预设温差，所述第一目标修正值对应的所述第一目标频率大于所述初始频率，所述第二目标修正值对应的所述第一目标频率小于所述初始频率。在本实施例中，第一温差值为预设换热器温度M与室内换热器温度N之间的差值(即M-N)，第一预设温差大于0，第二预设温差小于0。基于此，第一温差值大于或等于第一预设温差时，表明预设换热器温度大于室内换热器温度、且偏差较大，此时通过第一目标修正值增大初始频率得到第一目标频率，有利于使空调室内机的实际换热温度快速提高至预设换热器温度；第一温差值小于第二预设温差时，表明预设换热器温度小于室内换热器温度、且偏差较大，此时通过第二目标修正值减小初始频率得到第一目标频率。
具体的，定义X＝预设换热器温度-室内换热器温度，则可按照下表确定相应的频率修正值对压缩机的初始频率进行调整：
第一温差值(℃( X＜-3 -3≤X＜-2 -2≤X＜-1 -1≤X＜1 1≤X＜2 2≤X＜3 X≥3
频率修正值(Hz( -5 -2 -1 0 +1 +2 +3
其中，上表中的1为上述的第一预设温度，上表中的-1为上述的第二预设温度。
步骤S22，根据所述第一频率修正值调整所述压缩机的初始频率后获得第一目标频率；
这里的初始频率可预先设置的固定频率，也可为压缩机的当前运行频率。
具体的，可根据第一频率修正值增大、减小或维持初始频率从而得到第一目标频率。在本实施例中，第一频率修正值可同时表征频率修正方向和频率修正幅度，则可将第一频率修正值与初始频率的和值作为第一目标频率。在其他实施例中，第一频率修正值可仅表征频率修正幅度，则可根据室内换热器温度和预设换热器温度确定频率调整方向后，在频率调整方向为减小初始频率时，可将初始频率与第一频率修正值的差值作为第一目标频率；在频率调整方向为增大初始频率时，可将初始频率与第一频率修正值的和值作为第一目标频率。
步骤S23，控制所述压缩机以所述第一目标频率运行。
压缩机以第一目标频率运行时可使空调室内机的实际换热温度可维持预设换热器温度。
在本实施例中，在至少一个空调室内机有能需或能需较大时，按照上述方式对压缩机频率进行调控，可确保空调室内机的换热温度可维持在预设换热器温度，以满足室内环境的温度调节需求。
进一步的，在本实施例中，所述根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率的步骤之前，可按照下列两种方式中其中一种获取当前开启的空调室内机的室内换热器温度以用于对压缩机的频率进行调控：
方式一：响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，获取所述压缩机的排气压力；根据所述排气压力确定当前开启的空调室内机的冷凝温度，所述室内换热器温度包括所述冷凝温度。
具体的，可预先设置有排气压力与冷凝温度的数量关系，基于该数量关系确定通过排气压力计算得到当前开启的空调室内机的冷凝温度。或者，可预先设置有排气压力与冷凝温度的映射表，通过排气压力查询映射表可得到当前开启的空调室内机的冷凝温度。
需要说明的是，这里冷凝温度表征的是当前开启的所有空调室内机的室内换热器在冷凝过程中饱和温度的综合情况的温度值。
方式二：响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，获取当前开启的空调室内机额定制热量及其对应的室内换热器的盘管温度；根据所述额定制热量确定当前开启的每个空调室内机的权重值；根据所述盘管温度及其对应的权重值确定所述室内换热器温度。
例如，当前有能需的内机n台，额定制热量分别为n1、n2、n3…nx KW，各个内机的盘管温度对应为T21、T22、T23…T2x℃，则室内换热器温度
Figure PCTCN2022082329-appb-000001
进一步的，在本实施例中，步骤S10之后，还包括：响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，获取所述压缩机排气侧的压力传感器的安装状态信息； 响应于所述安装状态信息为所述压缩机排气侧未安装所述压力传感器的情形，按照上述方式一获取室内换热器温度；响应于所述安装状态信息为所述压缩机排气侧已安装所述压力传感器的情形，可按照上述方式二获取室内换热器温度。这里的安装状态信息可通过获取用户输入的指令确定。
这里，通过上述方式可保证压缩机排气侧是否安装有压力传感器，也可有效获取到表征当前开启的空调室内机换热情况的室内换热器温度。
进一步的，基于上述任一实施例，提出本申请多联机热泵系统的控制方法又一实施例。在本实施例中，参照图5，所述响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据所述水力模块的出水温度调整所述压缩机的运行频率的步骤包括：
步骤S201，响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据所述出水温度确定所述水力模块当前的第一冷凝温度；
这里的第一冷凝温度具体为水力模块输出的水在循环过程中换热的饱和温度(如毛细管地板或暖气片等在换热过程的饱和温度)。
不同的出水温度对应不同的第一冷凝温度。出水温度与第一冷凝温度之间的第二对应关系可预先设置，可为计算公式、映射表等。基于第二对应关系，通过出水温度可计算或查询映射表得到这里的第一冷凝温度。
步骤S202，根据所述第一冷凝温度和目标冷凝温度确定第二频率修正值；
这里的目标冷凝温度具体为预先设置的水力模块在制热过程中所需达到温度的目标值。
不同的第一冷凝温度和目标冷凝温度可对应有不同的第二频率修正值。预先建立第一冷凝温度、目标冷凝温度以及第二频率修正值之间的第三对应关系，该第三对应关系可为计算关系、映射关系等。基于该第三对应关系，可根据第一冷凝温度和目标冷凝温度可查表、计算等方式得到当前的第二频率修正值。
具体的，在本实施例中，确定所述目标冷凝温度与所述第二冷凝温度之间的第三温差值；当所述第三温差值大于或等于第三预设温差时，确定第三目标修正值为所述第二频率修正值；当所述第三温差值小于第四预设温差时，确定第四目标修正值为所述第二频率修正值；所述第四预设温差小于或等于所述第三预设温差，所述第三目标修正值对应的所述第二目标频率大于所述初始频率，所述第四目标修正值对应的所述第二目标频率小于所述初始频率。在本实施例中，第三温差值为预设换热器温度P与室内换热器温度Q之间的差值(即P-Q)，第三预设温差大于0，第四预设温差小于0。基于此，第三温差值大于或等于第三预设温差时，表明目标冷凝温度大于第一冷凝温度、且偏差较大，此时通过第三目标修正值增大初始频率得到第二目标频率，有利于水力模块的实际换热温度快速提高至目标冷凝温度；第三温差值小于第四预设温差时，表明目标冷凝温度小于第一冷凝温度、且偏差较大，此时通过第四目标修正值减小初始频率得到第二目标频率。
具体的，定义Y＝目标冷凝温度-第一冷凝温度，则可按照下表确定相应的频率修正值对压缩机的初始频率进行调整：
第三温差值(℃( Y＜-3 -3≤Y＜-2 -2≤Y＜-1 -1≤Y＜1 1≤Y＜2 2≤Y＜3 Y≥3
频率修正值(Hz( -5 -2 -1 0 +1 +2 +3
其中，上表中的1为上述的第三预设温度，上表中的-1为上述的第四预设温度。
步骤S203，根据所述第二频率修正值调整所述压缩机的初始频率后获得第二目标频率；
这里的初始频率可预先设置的固定频率，也可为压缩机的当前运行频率。
具体的，可根据第二频率修正值增大、减小或维持初始频率从而得到第二目标频率。在本实施例中，第二频率修正值可同时表征频率修正方向和频率修正幅度，则可将第二频率修正值与初始频率的和 值作为第二目标频率。在其他实施例中，第二频率修正值可仅表征频率修正幅度，则可根据室内换热器温度和预设换热器温度确定频率调整方向后，在频率调整方向为减小初始频率时，可将初始频率与第二频率修正值的差值作为第二目标频率；在频率调整方向为增大初始频率时，可将初始频率与第二频率修正值的和值作为第二目标频率。
步骤S204，控制所述压缩机以所述第二目标频率运行。
在本实施例中，在至少一个空调室内机没有能需或能需较小而水力模块有能需或能需较大时，按照上述方式对压缩机频率进行调控，可确保室内环境的温度调节需求满足的同时，压缩机输出能力可与水力模块需求的热量相匹配，避免水力模块的水温过快达到设定水温，有效防止压缩机频繁达温停机。
进一步的，在本实施例中，所述根据所述出水温度确定所述水力模块当前的第一冷凝温度的步骤包括：
步骤S201a，根据所述出水温度与所述水力模块的设定水温确定温度修正值；
这里的设定水温具体为预先设置的水力模块的出水温度所需达到的目标值。设定水温可为用户设置的温度，也可为根据用户设置的水力模块供暖的目标对象所需达到的目标温度所确定的温度。
具体的，可通过出水温度和设定水温计算得到温度修正值。例如，可将出水温度与设定温度的差值作为温度修正值。也可通过出水温度和设定水温查询预先设置的映射表得到温度修正值。
具体的，在本实施例中，确定所述设定水温与所述出水温度之间的第二温差值；根据所述第二温差值确定温度调整值；根据所述温度调整值调整所述设定水温后获得所述温度修正值；其中，所述温度调整值随所述第二温差值的增大呈增大趋势，且/或，所述温度调整值随所述第二温差值的减小呈减小趋势。在本实施例中，第二温差值具体为设定水温与出水温度的差值；在其他实施例中，第二温差值也可为出水温度与设定水温差值的绝对值。第二温差值可直接作为温度调整值，也可基于预设的温差与调整值之间的对应关系，通过第二温差值计算或查表得到温度调整值。在本实施例中，可获取出水温度的变化趋势，基于出水温度的变化趋势获取这里的温差与调整值之间的对应关系，不同的变化趋势对应不同的对应关系。出水温度为增大趋势时基于第四对应关系确定第二温差值对应的温度调整值，出水温度为减小趋势时基于第五对应关系确定第二温差值对应的温度调整值。如图6所示，出水温度在第四对应关系中对应的温度调整值大于出水温度在第五对应关系中对应的温度调整值。在本实施例中，将设定水温与温度调整值的和值作为温度修正值。在其他实施例中，也可将设定水温与温度调整值的差值、乘积或比值作为温度修正值。
步骤S201b，根据所述温度修正值修正预设冷凝温度后获得参考冷凝温度；
预设冷凝温度具体为预先设置的温度值，可为预先设置的固定值，也可为根据水力模块当前的设定水温从多个预先设置的温度值中选取得到的温度。
在本实施例中，可将温度修正值与预设冷凝温度的和值作为参考冷凝温度。在其他实施中，也可将预设冷凝温度与温度修正值的差值、乘积或比值作为参考冷凝温度。
步骤S201c，根据所述参考冷凝温度确定所述第一冷凝温度。
上述所得到的参考冷凝温度可直接作为第一冷凝温度，也可根据预先设置的固定修正值进行修正后的结果作为第一冷凝温度，还可将参考冷凝温度与预先设置的预设温度区间的临界值进行比较，若参考冷凝温度在预设温度区间内则可将参考冷凝温度直接作为第一冷凝温度；若参考冷凝温度在预设温度区间以外则可将预设温度区间的临界值作为第一冷凝温度。预设温度区间可为第一温度区间、第二温度区间或第三温度区间，第一温度区间为具有最小临界值而不具有最大临界值的温度区间，第二温度区间为具有最大临界值而不具有最小临界值的温度区间，第三温度区间为同时具有最小临界值和最大临界值的温度区间。
为了更好说明本实施例涉及的第一冷凝温度的确定过程，下面提供一个本实施例方案的具体应用：
定义：第一冷凝温度为Tw_cH，Tw-out为出水温度，Tw_cH0为预设冷凝温度(默认45℃，推 荐值40452℃)，T1S为设定水温，k为温度修正值，C为预设常数(默认45℃，推荐值35450℃)，△TWS为第二温差值，△Trs为基于△TWS去确定的中间参数。基于此，可结合下列公式和图6确定第一冷凝温度：公式(1)，Tw_cH＝Tw_cH0+(T1S-C(+k；公式(2)，k＝△Trs-1，k取值范围：-2≤k≤10。
具体的，基于图2确定△TWS所对应的△Trs，再通过△Trs和公式(2)计算得到k，再进一步通过公式(1)计算得到第一冷凝温度。
在本实施例中，结合水力模块的出水温度和设定温度所确定的温度修正值对预设冷凝温度修正后得到第一冷凝温度，可保证所得到的第一冷凝温度可准确表征当前水力模块的热负荷情况，保证基于所确定的第一冷凝温度对压缩机频率进行调控时的精准性，确保压缩机的输出能力与水力模块的实际制热需求相匹配，有效避免压缩机频繁达温停机。
进一步的，在本实施例中，上述根据所述参考冷凝温度确定所述第一冷凝温度的过程具体如下：响应于所述参考冷凝温度位于预设温度区间内，所述参考冷凝温度为所述第一冷凝温度；响应于所述参考冷凝温度小于所述预设温度区间的最小临界值，所述最小临界值为所述第一冷凝温度；响应于所述参考冷凝温度大于所述预设温度区间的最大临界值，所述最大临界值为所述第一冷凝温度。最大临界值和最小临界值可为预先设置的固定温度值，也可为根据多联机热泵系统当前运行工况所确定的参数值。在本实施例中，预设温度区间的最小临界值推荐值30℃，范围25435℃。这里通过预设温度区间对第一冷凝温度的取值进行限制，可避免第一冷凝温度过大或过小而导致压缩机运行频率过大或过小，以保证压缩机可靠稳定的运行。
进一步的，在本实施例中，在根据所述参考冷凝温度确定所述第一冷凝温度的步骤之前还包括：获取室外环境温度和所述压缩机当前的运行频率；根据所述室外环境温度和所述运行频率确定所述最大临界值。不同的室外环境温度和不同的运行频率对应不同的最大临界值。在本实施例中，通过室外环境温度和运行频率查询预先设置的映射表得到最大临界值。在其他实施例中，也可通过室外环境温度和运行频率和预设公式计算得到这里的最大临界值。
例如，可通过室外环境温度T4和压缩机频率F查询下表得到最大临界值：
Figure PCTCN2022082329-appb-000002
这里，结合室外环境温度和压缩机当前运行频率确定第一冷凝温度的最大临界值，从而基于最大临界值对第一冷凝温度进行限制，保证按照第一冷凝温度对压缩机运行频率进行调控时可进一步提高压缩机运行的可靠性和稳定性。
进一步的，基于上述任一实施例，提出本申请多联机热泵系统的控制方法再一实施例。在本实施例中，参照图7，所述响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据所述水力模块的出水温度调整所述压缩机的运行频率的步骤包括：
步骤S210，响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据第一目标温差、第二目标温差、所述出水温度以及所述水力模块的设定水温确定第三目标频率；
步骤S220，控制所述压缩机以所述第三目标频率运行。
其中，所述第一目标温差为当前时刻所述水力模块的第一实际冷凝温度与设定冷凝温度之间的温差值，所述第二目标温差为上一次根据所述水力模块的出口水温调整压缩机频率时所述水力模块的第二实际冷凝温度与设定冷凝温度之间的温差值，所述第一实际冷凝温度为所述出水温度对应的参数，所述第二实际冷凝温度为所述出口水温对应的参数。
这里的出口水温相当于对应时刻的出水温度。这里的第一实际冷凝温度和第二实际冷凝温度的确定过程可类比参照上述第一冷凝温度的确定过程，在此不作赘述。这里的设定冷凝温度具体为预先设置的第一冷凝温度所需达到的目标值。
其中，可循环执行步骤S10、步骤S210和步骤S220，基于此，响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，在循环过过程中当前的第三目标频率结合水力模块的第一实际冷凝温度与设定冷凝温度之间的温差以及上一次第三目标频率的过程中的水力模块的第二实际冷凝温度与设定冷凝温度之间的温差确定。
具体的，可预先设置的第一目标温差、第二目标温差、出水温度以及设定水温度与第三目标频率之间的预设对应关系。预设对应关系可为计算公式、映射表格等。基于预设对应关系可通过第一目标温差、第二目标温差、出水温度以及设定水温度计算和/或查表得到这里的第三目标频率。
在本实施例中，确定所述第一目标温差与所述第二目标温差之间的第三温差值，确定所述设定水温与所述出水温度之间的第四温差值；根据所述第三温差值和所述第四温差值确定目标频率调整值；根据所述目标频率调整值调整所述压缩机当前运行频率后得到所述第三目标频率；其中，所述第三目标频率随所述第三温差值的增大呈增大趋势，所述第三目标频率随所述第四温差值的增大呈增大趋势。换而言之，所述第三目标频率随所述第三温差值的减小呈减小趋势，所述第三目标频率随所述第四温差值的减小呈减小趋势。
在本实施例中，第三温差值为第一目标温差与第二目标温差的差值，第四温差值为设定水温与出水温度之间的差值。在其他实施例中，第三温差值可为第一目标温差与第二目标温差的差值的绝对值，第四温差值为设定水温与出水温度之间的差值的绝对值。
例如，可通过第三温差值ΔT1和第四温差值ΔT2查询下表匹配到的结果作为目标频率调整值ΔF：
Figure PCTCN2022082329-appb-000003
通过上表查询得到ΔF后，第三目标频率＝Fr+ΔF，Fr为压缩机当前的运行频率。
进一步的，基于上述任一实施例，提出本申请多联机热泵系统的控制方法再另一实施例。在本实施例中，参照图8，步骤S20执行的同时或之后，还包括：
步骤S30，调节所述空调室内机的第一电子膨胀阀的开度，以使所述空调室内机的实际换热温度与第一目标换热温度的温差小于第一设定温差；且/或，调节所述水力模块的第二电子膨胀阀的开度，以使所述水力模块的实际换热温度与第二目标换热温度的温差小于第二设定温差；其中，根据所述第一能需信息和所述第二能需信息确定所述第一目标换热温度和/或所述第二目标换热温度。
当所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值时，这里的第一目标换热温度为上述实施例提及的当前开启的空调室内机的室内换热器温度；当所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值时，这里的第二目标换热温度为上述实施例提及的第一冷凝温度。第一目标换热温度和第二目标换热温度具体的确定过程可参见上述实施例，在此不作赘述。
空调室内机的实际换热温度具体指的是室内换热器的盘管温度；水力模块的实际换热温度具体根据水力模块的冷媒流路的温度确定。
需要说明是的，空调室内机的数量多于一个时，每个空调室内机的第一电子膨胀阀基于其实际换热温度进行单独调控，实际换热温度不同则对应的第一电子膨胀阀的开度采用不同方式进行调整，从而使每个空调室内机的实际换热温度均可达到第一目标换热温度；水力模块的数量多于一个时，每个水力模块的第二电子膨胀阀基于其实际换热温度进行单独调控，实际换热温度不同则对应的第二电子膨胀阀的开度采用不同方式进行调整，从而使每个水力模块的实际换热温度均可达到第二目标换热温度。
在本实施例中，按照上述方式对空调室内机和水力模块的电子膨胀阀进行调控，可确保各个内机和水力模块获得的冷媒均衡，保证室内环境温度调节需求同时满足水力模块的供暖需求，还有利于进一步提高系统能效。
具体的，第一电子膨胀阀可按照下列过程进行调控：获取所述空调室内机当前的第一换热温度；根据所述第一换热温度与所述第一目标换热温度的第一偏差值确定第一开度调整值；根据所述第一开度调整值调节所述第一电子膨胀阀的开度；其中，所述第一开度调整值随所述第一偏差值的增大呈增大趋势。具体的，可获取空调器室内机中室内换热器的盘管温度作为这里的第一换热温度。具体的，可根据第一换热温度与第一目标换热温度之间的差值或比值等确定这里的第一开度调整值。第一开度调整值小于0时，根据第一开度调整值减小第一电子膨胀阀开度；第一开度调整值大于0时，根据第一开度调整值增大第一电子膨胀阀开度。
具体的，第二电子膨胀阀可按照下列过程进行调控：获取所述水力模块冷媒入口的第一温度和所述水力模块冷媒出口的第二温度；根据所述第一温度和所述第二温度确定所述水力模块的第二换热温度；根据所述第二换热温度与所述第二目标换热温度的第二偏差值确定第二开度调整值；根据所述第二开度调整值调节所述第二电子膨胀阀的开度；其中，所述第二开度调整值随所述第二偏差值的增大呈增大趋势。在本实施例中，将第一温度与第二温度之间差值的均值作为第二换热温度，表征水力模块内水路的等效盘管温度。在其他实施例中，也可将第一温度和第二温度中最小值或直接将第一温度与第二温度之间的差值作为第二换热温度。具体的，可根据第二换热温度与第二目标换热温度之间的差值或比值等确定这里的第二开度调整值。第二开度调整值小于0时，根据第二开度调整值减小第二电子膨胀阀开度；第二开度调整值大于0时，根据第二开度调整值增大第二电子膨胀阀开度。
其中，在按照第一开度调整值和/或第二开度调整值调整对应的电子膨胀阀的开度值之后，可间隔预设周期，重新确定新的第一开度调整值和/或新的第二开度调整值调整对应的电子膨胀阀的开度值。
具体的，定义第一换热温度与第一目标换热温度的差值或第二换热温度与第二目标换热温度的差值为Z，则可根据下列映射表确定对应的开度调整值：
Figure PCTCN2022082329-appb-000004
Figure PCTCN2022082329-appb-000005
由上表可知，在第一换热温度小于第一目标换热温度、且两个温度的温度偏差量大于阈值1时，对应的第一电子膨胀阀增大开度运行且开度调整量随温度偏差量增大呈增大趋势；在第一换热温度大于第一目标换热温度、且两个温度的温度偏差量大于阈值2时，对应的第一电子膨胀阀减小开度运行且开度调整量随温度偏差量增大呈增大趋势。在第二换热温度小于第二目标换热温度、且两个温度的温度偏差量大于阈值3时，对应的第二电子膨胀阀增大开度运行且开度调整量随温度偏差量增大呈增大趋势；在第二换热温度大于第二目标换热温度、且两个温度的温度偏差量大于阈值4时，对应的第二电子膨胀阀减小开度运行且开度调整量随温度偏差量增大呈增大趋势。
此外，本申请实施例还提出一种计算机可读存储介质，所述计算机可读存储介质上存储有多联机热泵系统的控制程序，所述多联机热泵系统的控制程序被处理器执行时实现如上多联机热泵系统的控制方法任一实施例的相关步骤。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者系统不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者系统中还存在另外的相同要素。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在如上所述的一个存储介质(如ROM/RAM、磁碟、光盘(中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，多联机热泵系统，或者网络设备等(执行本申请各个实施例所述的方法。
以上仅为本申请的可选实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (19)

  1. 一种多联机热泵系统的控制方法，其中，所述多联机热泵系统包括压缩机、至少一个水力模块和至少一个空调室内机，所述至少一个水力模块和所述至少一个空调室内机均与所述压缩机连接，所述多联机热泵系统的控制方法包括以下步骤：
    获取所述至少一个空调室内机的第一能需信息和所述至少一个水力模块的第二能需信息；所述第一能需信息表征所述至少一个空调室内机的制热量需求情况，所述第二能需信息表征所述至少一个水力模块的制热量需求情况；
    根据所述第一能需信息和所述第二能需信息对应的目标参数调整压缩机运行频率。
  2. 如权利要求1所述的多联机热泵系统的控制方法，其中，所述根据所述第一能需信息和所述第二能需信息对应的目标参数调整压缩机运行频率的步骤包括：
    响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率，所述目标参数包括所述室内换热器温度；
    响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据所述水力模块的出水温度调整所述压缩机的运行频率，所述目标参数包括所述出水温度。
  3. 如权利要求2所述的多联机热泵系统的控制方法，其中，所述响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率的步骤包括：
    响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，根据所述室内换热器温度与预设换热器温度确定第一频率修正值；
    根据所述第一频率修正值调整所述压缩机的初始频率后获得第一目标频率；
    控制所述压缩机以所述第一目标频率运行。
  4. 如权利要求3所述的多联机热泵系统的控制方法，其中，所述根据所述室内换热器温度与预设换热器温度确定第一频率修正值的步骤包括：
    确定所述预设换热器温度与所述室内换热器温度之间的第一温差值；
    响应于所述第一温差值大于或等于第一预设温差的情形，第一目标修正值为所述第一频率修正值；
    响应于所述第一温差值小于第二预设温差的情形，第二目标修正值为所述第一频率修正值；
    所述第二预设温差小于或等于所述第一预设温差，所述第一目标修正值对应的所述第一目标频率大于所述初始频率，所述第二目标修正值对应的所述第一目标频率小于所述初始频率。
  5. 如权利要求2所述的多联机热泵系统的控制方法，其中，所述根据当前开启的空调室内机的室内换热器温度调整所述压缩机的运行频率的步骤之前，还包括：
    响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，获取所述压缩机的排气压力；
    根据所述排气压力确定当前开启的空调室内机的冷凝温度，所述室内换热器温度包括所述冷凝温度；
    或，响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形， 获取当前开启的空调室内机额定制热量及其对应的室内换热器的盘管温度；
    根据所述额定制热量确定当前开启的每个空调室内机的权重值；
    根据所述盘管温度及其对应的权重值确定所述室内换热器温度。
  6. 如权利要求5所述的多联机热泵系统的控制方法，其中，所述获取所述至少一个空调室内机的第一能需信息和所述至少一个水力模块的第二能需信息的步骤之后，还包括：
    响应于所述第一能需信息为所述至少一个空调室内机需求的制热量大于第一预设值的情形，获取所述压缩机排气侧的压力传感器的安装状态信息；
    响应于所述安装状态信息为所述压缩机排气侧未安装所述压力传感器的情形，执行所述获取所述压缩机的排气温度的步骤以及所述根据所述排气温度确定当前开启的空调室内机的冷凝温度的步骤；
    响应于所述安装状态信息为所述压缩机排气侧已安装所述压力传感器的情形，执行所述获取当前开启的空调室内机额定制热量及其对应的室内换热器的盘管温度的步骤、所述根据所述额定制热量确定当前开启的每个空调室内机的权重值的步骤以及所述根据所述盘管温度及其对应的权重值确定所述室内换热器温度的步骤。
  7. 如权利要求2所述的多联机热泵系统的控制方法，其中，所述确定所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值，根据所述水力模块的出水温度调整所述压缩机的运行频率的步骤包括：
    响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据所述出水温度确定所述水力模块当前的第一冷凝温度；
    根据所述第一冷凝温度和目标冷凝温度确定第二频率修正值；
    根据所述第二频率修正值调整所述压缩机的初始频率后获得第二目标频率；
    控制所述压缩机以所述第二目标频率运行。
  8. 如权利要求7所述的多联机热泵系统的控制方法，其中，所述根据所述出水温度确定所述水力模块当前的第一冷凝温度的步骤包括：
    根据所述出水温度与所述水力模块的设定水温确定温度修正值；
    根据所述温度修正值修正预设冷凝温度后获得参考冷凝温度；
    根据所述参考冷凝温度确定所述第一冷凝温度。
  9. 如权利要求8所述的多联机热泵系统的控制方法，其中，所述根据所述出水温度与所述水力模块的设定水温确定温度修正值的步骤包括：
    确定所述设定水温与所述出水温度之间的第二温差值；
    根据所述第二温差值确定温度调整值；
    根据所述温度调整值调整所述设定水温后获得所述温度修正值；
    其中，所述温度调整值随所述第二温差值的增大呈增大趋势，且/或，所述温度调整值随所述第二温差值的减小呈减小趋势。
  10. 如权利要求8所述的多联机热泵系统的控制方法，其中，所述根据所述参考冷凝温度确定所述第一冷凝温度的步骤包括：
    响应于所述参考冷凝温度位于预设温度区间内的情形，所述参考冷凝温度为所述第一冷凝温度；
    响应于所述参考冷凝温度小于所述预设温度区间的最小临界值的情形，所述最小临界值为所述 第一冷凝温度；
    响应于所述参考冷凝温度大于所述预设温度区间的最大临界值的情形，所述最大临界值为所述第一冷凝温度。
  11. 如权利要求10所述的多联机热泵系统的控制方法，其中，所述根据所述参考冷凝温度确定所述第一冷凝温度的步骤之前，还包括：
    获取室外环境温度和所述压缩机当前的运行频率；
    根据所述室外环境温度和所述运行频率确定所述最大临界值。
  12. 如权利要求7所述的多联机热泵系统的控制方法，其中，所述根据所述第一冷凝温度和目标冷凝温度确定第二频率修正值的步骤包括：
    确定所述目标冷凝温度与所述第二冷凝温度之间的第三温差值；
    响应于所述第三温差值大于或等于第三预设温差的情形，第三目标修正值为所述第二频率修正值；
    响应于所述第三温差值小于第四预设温差的情形，第四目标修正值为所述第二频率修正值；
    所述第四预设温差小于或等于所述第三预设温差，所述第三目标修正值对应的所述第二目标频率大于所述初始频率，所述第四目标修正值对应的所述第二目标频率小于所述初始频率。
  13. 如权利要求2所述的多联机热泵系统的控制方法，其中，所述确定所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值，根据所述水力模块的出水温度调整所述压缩机的运行频率的步骤包括：
    响应于所述第一能需信息为所述至少一个空调室内机需求的制热量小于或等于所述第一预设值、且所述第二能需信息为所述至少一个水力模块需求的制热量大于第二预设值的情形，根据第一目标温差、第二目标温差、所述出水温度以及所述水力模块的设定水温确定第三目标频率；
    控制所述压缩机以所述第三目标频率运行；
    其中，所述第一目标温差为当前时刻所述水力模块的第一实际冷凝温度与设定冷凝温度之间的温差值，所述第二目标温差为上一次根据所述水力模块的出口水温调整压缩机频率时所述水力模块的第二实际冷凝温度与设定冷凝温度之间的温差值，所述第一实际冷凝温度为所述出水温度对应的参数，所述第二实际冷凝温度为所述出口水温对应的参数。
  14. 如权利要求13所述的多联机热泵系统的控制方法，其中，所述根据第一目标温差、第二目标温差、所述出水温度以及所述水力模块的设定水温确定第三目标频率的步骤包括：
    确定所述第一目标温差与所述第二目标温差之间的第三温差值，确定所述设定水温与所述出水温度之间的第四温差值；
    根据所述第三温差值和所述第四温差值确定目标频率调整值；
    根据所述目标频率调整值调整所述压缩机当前运行频率后得到所述第三目标频率；
    其中，所述第三目标频率随所述第三温差值的增大呈增大趋势，所述第三目标频率随所述第四温差值的增大呈增大趋势。
  15. 如权利要求1至14中任一项所述的多联机热泵系统的控制方法，其中，所述根据所述第一能需信息和所述第二能需信息对应的目标参数调整压缩机运行频率的步骤执行的同时或之后，还包括：
    调节所述空调室内机的第一电子膨胀阀的开度，以使所述空调室内机的实际换热温度与第一目标换热温度的温差小于第一设定温差；
    且/或，调节所述水力模块的第二电子膨胀阀的开度，以使所述水力模块的实际换热温度与第二目标换热温度的温差小于第二设定温差；
    其中，根据所述第一能需信息和所述第二能需信息确定所述第一目标换热温度和/或所述第二目标换热温度。
  16. 如权利要求15所述的多联机热泵系统的控制方法，其中，所述调节所述空调室内机的第一电子膨胀阀的开度的步骤包括：
    获取所述空调室内机当前的第一换热温度；
    根据所述第一换热温度与所述第一目标换热温度的第一偏差值确定第一开度调整值；
    根据所述第一开度调整值调节所述第一电子膨胀阀的开度；
    其中，所述第一开度调整值随所述第一偏差值的增大呈增大趋势。
  17. 如权利要求15所述的多联机热泵系统的控制方法，其中，所述调节所述水力模块的第二电子膨胀阀的开度的步骤包括：
    获取所述水力模块冷媒入口的第一温度和所述水力模块冷媒出口的第二温度；
    根据所述第一温度和所述第二温度确定所述水力模块的第二换热温度；
    根据所述第二换热温度与所述第二目标换热温度的第二偏差值确定第二开度调整值；
    根据所述第二开度调整值调节所述第二电子膨胀阀的开度；
    其中，所述第二开度调整值随所述第二偏差值的增大呈增大趋势。
  18. 一种多联机热泵系统，其中，所述多联机热泵系统包括：
    压缩机；
    至少一个水力模块；
    至少一个空调室内机，所述至少一个水力模块和所述至少一个空调室内机均与所述压缩机连接；以及
    控制装置，所述压缩机、所述至少一个水力模块和所述至少一个空调室内机均与所述控制装置连接，所述控制装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的多联机热泵系统的控制程序，所述多联机热泵系统的控制程序被所述处理器执行时实现如权利要求1至17中任一项所述的多联机热泵系统的控制方法的步骤。
  19. 一种计算机可读存储介质，其中，所述计算机可读存储介质上存储有多联机热泵系统的控制程序，所述多联机热泵系统的控制程序被处理器执行时实现如权利要求1至17中任一项所述的多联机热泵系统的控制方法的步骤。
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