EP4040072A1 - Integriertes wärmepumpensystem und steuerungsverfahren dafür - Google Patents

Integriertes wärmepumpensystem und steuerungsverfahren dafür Download PDF

Info

Publication number
EP4040072A1
EP4040072A1 EP22161182.5A EP22161182A EP4040072A1 EP 4040072 A1 EP4040072 A1 EP 4040072A1 EP 22161182 A EP22161182 A EP 22161182A EP 4040072 A1 EP4040072 A1 EP 4040072A1
Authority
EP
European Patent Office
Prior art keywords
valve assembly
throttle valve
compressors
heat exchanger
flow paths
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22161182.5A
Other languages
English (en)
French (fr)
Other versions
EP4040072B1 (de
Inventor
Guangyu SHEN
Hongsheng Liu
Jinxiang Wang
Shuguang Zhang
Shuang LU
Hui ZHAI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Publication of EP4040072A1 publication Critical patent/EP4040072A1/de
Application granted granted Critical
Publication of EP4040072B1 publication Critical patent/EP4040072B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F25B41/00—Fluid-circulation arrangements
    • 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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
    • 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
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
    • 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
    • F25B2313/005—Outdoor unit expansion valves
    • 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
    • F25B2313/02331—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements during cooling
    • 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
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
    • 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
    • F25B2313/029—Control issues
    • F25B2313/0292—Control issues related to reversing valves
    • 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
    • F25B2400/075—Details of compressors or related parts with parallel compressors

Definitions

  • the present invention relates to the field of integrated equipment for air conditioning and refrigeration and freezing. More specifically, the present invention relates to an integrated heat pump system and a control method therefor.
  • a commonly used solution is to provide corresponding outdoor units and indoor units for the two systems, and to form pipeline connections between multiple outdoor units and indoor units, thereby achieving heat recovery in partial operating modes.
  • the integration level of this type of equipment is low, and the units take up a lot of space, so it is not inconvenient in application.
  • the present invention provides an integrated heat pump system and a control method therefor, so as to improve the integration problem of the integrated heat pump system.
  • an integrated heat pump system which comprises: an air-conditioning indoor unit having a first indoor heat exchanger set and a first throttle valve assembly for controlling the on-off of flow paths and throttling degree; a display cabinet indoor unit having a second indoor heat exchanger set and a second throttle valve assembly for controlling on-off of flow paths and throttling degree, wherein the second indoor heat exchange sets have a temperature regulating setpoint different from that of the first indoor heat exchanger set; and an outdoor unit connected to the air-conditioning indoor unit and the display cabinet indoor unit through pipelines.
  • the outdoor unit comprises: at least two compressors connected in parallel and configured to provide different evaporation temperatures respectively; an outdoor heat exchanger set; a third throttle valve assembly configured to control the on-off of flow paths and throttling degree of the outdoor heat exchanger set; and a mode switch valve assembly configured to guide refrigerant flowing out of the at least two compressors into at least one of the first indoor heat exchanger set and the outdoor heat exchanger set by switching pipeline connections.
  • the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the outdoor heat exchanger set by switching pipeline connections; the third throttle valve assembly is controlled to turn on the flow paths, and the throttling degree of at least one of the first throttle valve assembly and the second throttle valve assembly is controlled.
  • the refrigeration mode comprises one or more of the following modes: an air-conditioning refrigeration mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the outdoor heat exchanger set by switching pipeline connections; the third throttle valve assembly turns on the flow paths, the first throttle valve assembly provides a controlled throttling degree, and the second throttle valve assembly turns off the flow paths; and the first compressor of the at least two compressors is activated; a display cabinet refrigeration mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the outdoor heat exchanger set by switching pipeline connections; the third throttle valve assembly turns on the flow paths, the second throttle valve assembly provides a controlled throttling degree, and the first throttle valve assembly turns off the flow paths; and the second compressor of the at least two compressors is activated; a cooperative refrigeration mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the outdoor heat exchanger set by switching pipeline connections; the third throttle valve
  • the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the first indoor heat exchanger set by switching pipeline connections; the first throttle valve assembly are controlled to turn on the flow paths; and the throttling degree of at least one of the second throttle valve assembly and the third throttle valve assemblies is controlled.
  • the heating mode comprises one or more of the following modes: an air-conditioning heating mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the first indoor heat exchanger set by switching pipeline connections; the first throttle valve assembly turns on the flow paths, the third throttle valve assembly provides a controlled throttling degree, and the second throttle valve assembly turns off the flow paths; and the first compressor of the at least two compressors is activated; a heat rejection and heat recovery mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the first indoor heat exchanger set and the outdoor heat exchanger set by switching pipeline connections; the first throttle valve assembly and the third throttle valve assembly turn on the flow paths, and the second throttle valve assembly provides a controlled throttling degree; and the at least two compressors are activated; a compensation heat recovery mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the outdoor heat exchanger set by switching pipeline connections; the
  • the mode switch valve assembly comprises: a first four-way valve and a second four-way valve arranged in parallel; wherein, the first four-way valve has a first port connected to the exhaust ports of the at least two compressors, a second port connected to the suction ports of the at least two compressors, a third port connected to the second four-way valve, and a fourth port connected to the second port through capillary tubes; and wherein the second four-way valve has a fifth port connected to the exhaust ports of the at least two compressors, a sixth port connected to the first four-way valve, a seventh port connected to the outdoor heat exchanger set, and an eighth port connected to the first indoor heat exchanger set.
  • the integrated heat pump system further comprises a subcooling branch provided with a subcooling heat exchanger and an additional throttle element.
  • the subcooling branch is connected from the third throttle valve assembly to the suction ports of the at least two compressors through the first flow path of the subcooling heat exchanger, the additional throttle element, and the second flow path of the subcooling heat exchanger.
  • a control method for the integrated heat pump system as described above comprises: operating a refrigeration mode, guiding the refrigerant flowing out of the at least two compressors into the outdoor heat exchanger set by switching pipeline connections through control of the mode switch valve assembly; controlling the third throttle valve assembly to turn on the flow paths; and controlling the throttling degree of at least one of the first throttle valve assembly and the second throttle valve assembly; or operating a heating mode, guiding the refrigerant flowing out of the at least two compressors into at least the first indoor heat exchanger set by switching pipeline connections through control of the mode switch valve assembly; controlling the first throttle valve assembly to turn on the flow paths; and controlling the throttling degree of at least one of the second throttle valve assembly and the third throttle valve assembly.
  • the refrigeration mode comprises one or more of the following modes: an air-conditioning refrigeration mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the outdoor heat exchanger set by switching pipeline connections; the third throttle valve assembly is controlled to turn on the flow paths, the throttling degree of the first throttle valve assembly is controlled, and the second throttle valve assembly is controlled to turn off the flow paths; and the first compressor of the at least two compressors is activated; a display cabinet refrigeration mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the outdoor heat exchanger set by switching pipeline connections; the third throttle valve assembly is controlled to turn on the flow paths, and the throttling degree of the second throttle valve assembly is controlled; the first throttle valve assembly is controlled to turn off the flow paths; and the second compressor of the at least two compressors is activated; a cooperative refrigeration mode: wherein the mode switch valve assembly is configured to guide the refrigerant flowing out of the at least two compressors into the
  • the mode switch valve assembly comprises: a first four-way valve and first solenoid valve arranged in parallel, and a second solenoid valve arranged in series with the first four-way valve; wherein the first four-way valve has a first port connected to the second solenoid valve, a second port connected to the suction ports of the at least two compressors, a third port connected to the first heat exchange flow path, and a fourth port connected to the first indoor heat exchanger set; and wherein the first solenoid valve has a fifth port connected to the exhaust ports of the at least two compressors, and a sixth port connected to the second heat exchange flow path; and the second solenoid valve has a seventh port connected to the exhaust ports of the at least two compressors and an eighth port connected to the first four-way valve.
  • the integrated heat pump system further comprises a subcooling branch provided with a subcooling heat exchanger and an additional throttle element.
  • the subcooling branch is connected to the suction ports of the at least two compressors through the second heat exchange flow path, the first flow path of the subcooling heat exchanger, the additional throttle element, and the second flow path of the subcooling heat exchanger.
  • the first heat exchange flow path and the second heat exchange flow path of the outdoor heat exchanger sets are in the form of staggered arrangement through pipelines or in the form of staggered arrangement through stacking.
  • the switching of pipeline connections through the mode switch valve assembly is coordinated with the on-off of pipelines through the multiple on-off valve assemblies to improve pipeline connections, thereby providing an outdoor unit that can be shared by a variety of indoor units with different functions, which improves the integration of the units, saves footprint, provides a variety of operating modes at the same time, broadens application scope and improves heat utilization.
  • set defined in the text refers to a set of the same devices or components, which have structural and functional similarities. Unless explicitly stated otherwise, the “set” mentioned in the text means that there are one or more devices or components.
  • the air-conditioning indoor unit 110 has first indoor heat exchanger sets 111a, 111b for heat exchange with indoor air, and first throttle valve assemblies 112a, 112b for controlling the on-off of flow paths and throttling degree, thereby allowing or not allowing the refrigerant to flow through all or part of the first indoor heat exchanger sets 111a, 111b, and expanding the refrigerant flowing through the first indoor heat exchanger sets 111a, 111b to a desired throttling degree. Since the first indoor heat exchanger sets are usually arranged in different rooms, the control of the on-off of the flow paths and throttling degree by the first throttle valve assemblies 112a, 112b can realize temperature regulating of each room.
  • the figure exemplarily provides two sets of heat exchangers 111a, 111b and a corresponding number of electronic expansion valves as the first indoor heat exchanger sets and the first throttle valve assemblies respectively, as a matter of fact however, the number can be increased or decreased according to demand.
  • multiple sets of heat exchangers can be arranged in series or parallel in the same room, or multiple sets of heat exchangers can be arranged in parallel in more different rooms to achieve similar air conditioning functions.
  • the second indoor heat exchanger sets are usually arranged in different refrigerating or freezing storage spaces, at this time, the control of the on-off of the flow paths and throttling degree by the second throttle valve assemblies 122a, 122b can realize temperature regulating of each storage space.
  • the second indoor heat exchanger sets 121a, 121b have a temperature regulating setpoint different from that of the first indoor heat exchanger sets 111a, 111b. Accordingly, compressors that can provide different evaporation temperatures are usually required to perform the system circulation separately.
  • the heat pump system with this configuration realizes the improvement of pipeline connections through the cooperation of pipeline connection switching through the mode switch valve assembly and control of the on-off of the flow paths through the multiple throttle valve assemblies (used as on-off valves respectively), thereby providing an outdoor unit that can be shared by a variety of indoor units with different functions, which improves the integration of the units, saves footprint, provides a variety of operating modes at the same time, broadens application scope and improves heat utilization.
  • solenoid valves 138c and one-way valves 138f are also provided in multiple places in the flow path of the system.
  • the one-way valve has a fluid stop direction opposite to that of the solenoid valve.
  • the example of this combination is mainly based on the considerations of valve structure design and material cost constraints. Because the solenoid valve currently used usually only has the one-way "turned off” function, in order to ensure the turn off of the flow path, it is necessary to accordingly arrange a one-way stop valve in the flow direction where the solenoid valve cannot be completely “turned off” for coordinated use.
  • connection mode there can be multiple, and the present embodiment provides one of the preferred solutions.
  • those skilled in the art can easily modify or adjust the connection mode thereof, and such modifications or adjustments should be included in the protection scope of the present application.
  • stop valves 134a, 134b, 134c may also be arranged at each interface between the outdoor unit and the air-conditioning indoor unit and the display cabinet indoor unit, so that the outdoor unit can be sold, transported or installed as a single device.
  • the stop valves 134a, 134b, 134c Before being assembled into a system (that is, before being connected to be a circulation loop), the stop valves 134a, 134b, 134c can be turned off separately, so that the pipelines of the outdoor unit are closed to the outside, so as to prevent impurities or dust from entering the pipelines of the outdoor unit. After the assembly is completed, however, the stop valves 134a, 134b, 134c can be kept open under normal operating conditions, or the stop valves 134a, 134b, 134c can be turned off again during maintenance.
  • These components can also be some sensors and control equipment, such as a low pressure sensor 139a, a suction temperature sensor 139f, and a low pressure switch 139b arranged at the suction port of the compressor, or an exhaust temperature sensor 139c, a high pressure sensor 139e, and a high pressure switch 139d arranged at the exhaust port of the compressor, and so on.
  • a low pressure sensor 139a a suction temperature sensor 139f
  • a low pressure switch 139b arranged at the suction port of the compressor
  • an exhaust temperature sensor 139c a high pressure sensor 139e
  • a high pressure switch 139d arranged at the exhaust port of the compressor
  • the refrigerant flowing out of the two compressors 133a and 133b can be guided into the outdoor heat exchanger set 131 by switching pipeline connections through control of the mode switch valve assembly.
  • the third throttle valve assembly 132 is controlled to turn on the flow paths.
  • the throttling degree of at least one of the first throttle valve assemblies 112a, 112b and the second throttle valve assemblies 122a, 122b is controlled.
  • the outdoor heat exchanger set 131 performs the function of a condenser, while at least one of the first indoor heat exchanger sets 111a, 111b or the second indoor heat exchanger sets 121a, 121b performs the function of an evaporator, so as to provide refrigeration temperature regulating for the corresponding indoor air or provide refrigeration/freezing temperature regulating for stored commodities.
  • the first indoor heat exchanger sets 111a, 111b perform the function of a condenser
  • at least one of the outdoor heat exchanger set 131 or the second indoor heat exchanger sets 121a, 121b performs the function of an evaporator
  • the outdoor heat exchanger set 131 can optionally assist in performing the function of a condenser as well, so as to provide heating temperature regulating for the corresponding indoor air or provide refrigeration/freezing temperature regulating for stored commodities.
  • the first compressor 133a for providing an air conditioning evaporation temperature is activated.
  • the refrigerant After being compressed by the first compressor 133a, the refrigerant will flow into the first four-way valve 135 and the second four-way valve 136 respectively.
  • the corresponding flow path of the first four-way valve is turned off, so the refrigerant will pass through the second four-way valve 136 and continue to flow into the outdoor heat exchanger set 131 to be condensed. It then passes through the third throttle valve assembly 132 and enters the subcooling heat exchanger 137a to be subcooled.
  • the refrigerant is then throttled by the first throttle valve assemblies 112a, 112b and flows into the first indoor heat exchanger sets 111a, 111b to be evaporated.
  • refrigeration conditioning for indoor air temperature is completed.
  • the refrigerant that has completed temperature regulating will return to the first compressor 133a through the second four-way valve 136 and the first four-way valve 135, thereby completing the entire circulation.
  • the first four-way valve 135 can be switched so that its first port 135a is connected to the fourth port 135d, and its second port 135b is connected to the third port 135c.
  • the second four-way valve 136 is switched so that its fifth port 136a is connected to the seventh port 136c, and its sixth port 136b is connected to the eighth port 136d.
  • the third throttle valve assembly 132 is configured to turn on the flow paths; the second throttle valve assemblies 122a, 122b are configured to be turned on to provide a controlled throttling degree; and at the same time the first throttle valve assemblies 112a, 112b are configured to turn off the flow paths.
  • the second compressor 133b for providing an evaporation temperature for commodity refrigeration/freezing conditioning is activated.
  • the refrigerant After being compressed by the second compressor 133b, the refrigerant will flow into the first four-way valve 135 and the second four-way valve 136 respectively.
  • the corresponding flow path of the first four-way valve is turned off, so the refrigerant will pass through the second four-way valve 136 and continue to flow into the outdoor heat exchanger set 131 to be condensed. It then passes through the third throttle valve assembly 132 and enters the subcooling heat exchanger 137a to be subcooled.
  • the refrigerant is then throttled by the second throttle valve assemblies 122a, 122b and flows into the second indoor heat exchanger sets 211a, 211b to be evaporated.
  • refrigeration/freezing temperature regulating for the commodities in the storage space is completed.
  • the refrigerant that has completed temperature regulating will return to the second compressor 133b, thereby completing the entire circulation.
  • the first four-way valve 135 can be switched so that its first port 135a is connected to the fourth port 135d, and its second port 135b is connected to the third port 135c.
  • the second four-way valve 136 is switched so that its fifth port 136a is connected to the seventh port 136c, and its sixth port 136b is connected to the eighth port 136d.
  • the third throttle valve assembly 132 is configured to turn on the flow paths; the first throttle valve assemblies 112a, 112b and the second throttle valve assemblies 122a, 122b are configured to provide a controlled throttling degree respectively.
  • the two compressors 133a and 133b are activated simultaneously.
  • the refrigerant After being compressed by the compressors 133a and 133b, the refrigerant will flow into the first four-way valve 135 and the second four-way valve 136 respectively.
  • the corresponding flow path of the first four-way valve is turned off, so the refrigerant will pass through the second four-way valve 136 and continue to flow into the outdoor heat exchanger set 131 to be condensed. It then passes through the third throttle valve assembly 132 and enters the subcooling heat exchanger 137a to be subcooled.
  • a part of the refrigerant is throttled by the second throttle valve assemblies 122a, 122b and flows into the second indoor heat exchanger sets 211a, 211b to be evaporated.
  • refrigeration/freezing temperature regulating for the commodities in the storage space is completed.
  • the refrigerant that has completed temperature regulating will directly return to the two compressors 133a, 133b, thereby completing this part of the circulation.
  • the other part of the refrigerant is throttled by the first throttle valve assemblies 112a, 112b and flows into the first indoor heat exchanger sets 111a, 111b to be evaporated, thereby completing refrigeration temperature regulating for the indoor air.
  • the refrigerant that has completed temperature regulating will return to the two compressors 133a, 133b through the second four-way valve 136 and the first four-way valve 135 in turn, thereby completing the other part of the circulation.
  • the entire circulation is completed.
  • an outdoor heat exchanger set When operating a conventional air-conditioning heating mode, an outdoor heat exchanger set is usually required to serve as an evaporator to absorb heat. Since this mode is usually applied in winter when the outdoor temperature is very low, at this time, the outdoor heat exchanger set is prone to frost, which affects the system efficiency. At this time, operating the outdoor unit defrost mode can be considered, i.e., operating any one of the air-conditioning refrigeration mode, the display cabinet refrigeration mode, and the cooperative refrigeration mode, so that the high-temperature refrigerant flows through the outdoor heat exchanger set to dissipate heat and defrost, thereby eliminate frost.
  • the first four-way valve 135 can be switched so that its first port 135a is connected to the fourth port 135d, and its second port 135b is connected to the third port 135c.
  • the second four-way valve 136 is switched so that its fifth port 136a is connected to the eighth port 136d, and its sixth port 136b is connected to the seventh port 136c.
  • the first throttle valve assemblies 112a, 112b are configured to turn on the flow paths;
  • the third throttle valve assembly 132 is configured to provide a controlled throttling degree, and the second throttle valve assemblies 122a, 122b are configured to turn off the flow paths.
  • the third throttle valve assembly 132 is throttled by the third throttle valve assembly 132 and flows into the outdoor heat exchanger set 131 to be evaporated.
  • the refrigerant then returns to the first compressor 133a through the second four-way valve 136 and the first four-way valve 135 in turn, thereby completing the entire circulation.
  • the first four-way valve 135 can be switched so that its first port 135a is connected to the third port 135c, and its second port 135b is connected to the fourth port 135d.
  • the second four-way valve 136 is switched so that its fifth port 136a is connected to the seventh port 136c, and its sixth port 136b is connected to the eighth port 136d.
  • the first throttle valve assemblies 112a, 112b and the third throttle valve assembly 132 are configured to turn on the flow paths simultaneously.
  • the second throttle valve assemblies 122a, 122b are configured to provide a controlled throttling degree.
  • the first four-way valve 135 can be switched so that its first port 135a is connected to the fourth port 135d, and its second port 135b is connected to the third port 135c.
  • the second four-way valve 136 is switched so that its fifth port 136a is connected to the eighth port 136d, and its sixth port 136b is connected to the seventh port 136c.
  • the first throttle valve assemblies 112a, 112b is configured to turn on the flow paths.
  • the second throttle valve assemblies 122a, 122b and the third throttle valve assembly 132 are configured to provide a controlled throttling degree respectively. At this time, the two compressors 133a and 133b are activated simultaneously.
  • the refrigerant After being compressed by the compressors 133a and 133b, the refrigerant will flow into the first four-way valve 135 and the second four-way valve 136 respectively.
  • the corresponding flow path of the first four-way valve 135 is turned off, so the refrigerant will pass through the second four-way valve 136 and flow into the first indoor heat exchanger sets 111a, 111b to be condensed.
  • heating conditioning for the indoor air temperature is completed.
  • a part of the refrigerant is throttled by the second throttle valve assemblies 122a, 122b and flows into the second indoor heat exchanger sets 211a, 211b to be evaporated, so as to perform refrigeration/freezing temperature regulating for the commodities in the storage space.
  • the first four-way valve 135 can be switched so that its first port 135a is connected to the fourth port 135d, and its second port 135b is connected to the third port 135c.
  • the second four-way valve 136 is switched so that its fifth port 136a is connected to the eighth port 136d, and its sixth port 136b is connected to the seventh port 136c.
  • the first throttle valve assemblies 112a, 112b are configured to turn on the flow paths.
  • the second throttle valve assemblies 122a, 122b are configured to provide a controlled throttling degree, and the third throttle valve assembly 132 is configured to turn off the flow paths.
  • the two compressors 133a and 133b are activated simultaneously. After being compressed by the compressors 133a and 133b, the refrigerant will flow into the first four-way valve 135 and the second four-way valve 136 respectively. The corresponding flow path of the first four-way valve 135 is turned off, so the refrigerant will pass through the second four-way valve 136 and flow into the first indoor heat exchanger sets 111a, 111b to be condensed. Thus, heating conditioning for the indoor air temperature is completed.
  • control method for the integrated heat pump system are described in a certain order, these steps are not necessarily performed in sequence in the described order. Unless explicitly stated herein, there is no strict order for the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps of the method may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the order of execution is not necessarily sequential. Instead, they can be performed in turn or alternately with at least a part of other steps or the sub-steps or stages of other steps.
  • the integrated heat pump system 200 comprises three major components: an air-conditioning indoor unit 210, a display cabinet indoor unit 220, and an outdoor unit 230.
  • the air-conditioning indoor unit 210 is used to provide air temperature regulating for the indoor space, such as refrigeration or heating.
  • the display cabinet indoor unit 220 is used to provide temperature regulating for commodities stored and displayed therein, usually refrigeration or freezing.
  • the outdoor unit 230 is usually used to provide heat dissipation or heat absorption functions for the integrated heat pump system 200 accordingly, so as to ensure the normal operation of the entire circulation, or to provide heat recovery functions under certain circumstances to improve system efficiency.
  • the integrated heat pump system has an outdoor unit 230 integrated in a housing.
  • the outdoor unit 230 is connected to the air-conditioning indoor unit 210 and the display cabinet indoor unit 220 through pipelines to form a loop, so as to perform air conditioning of the air-conditioning indoor unit 210 and temperature regulating of the commodities in the display cabinet indoor unit 220, respectively.
  • the outdoor unit 230 comprises at least compressors 233a, 233b, and an outdoor heat exchanger set 231, thereby forming the four major components of the refrigeration cycle together with the first indoor heat exchanger sets or the second indoor heat exchanger sets.
  • the outdoor heat exchanger set 231 has a first heat exchange flow path 231a and a second heat exchange flow path 231b that are not connected to each other, wherein the first heat exchange flow path 231a is connected to the air-conditioning indoor unit 210, and the second heat exchange flow path 231b is connected to the display cabinet indoor unit 220 and the suction ports of the two compressors 233a and 233b.
  • the outdoor unit 230 further comprises a third throttle valve assembly 232 and a mode switch valve assembly.
  • the throttle valve assembly close to the heat exchanger used as a condenser can be kept fully opened, while the throttle valve assembly close to the heat exchanger used as an evaporator is adjusted to provide a throttling effect.
  • the mode switch valve assembly may comprise: a first four-way valve 235 and a first solenoid valve 236 arranged in parallel, and a second solenoid valve 238 arranged in series with the first four-way valve 235.
  • the first four-way valve 235 has a first port 235a connected to the second solenoid valve 238, a second port 235b connected to the suction ports of the two compressors 233a, 233b, a third port 235c connected to the first heat exchange flow path 231a, and a fourth port 235d connected to the first indoor heat exchangers sets 211a, 211b.
  • solenoid valves 238c and one-way valves 238f are also provided in multiple places in the flow path of the system.
  • the one-way valve has a fluid stop direction opposite to that of the solenoid valve.
  • the example of this combination is mainly based on the considerations of valve structure design and material cost constraints. Because the solenoid valve currently used usually only has the one-way "turned off” function, in order to ensure the turn off of the flow path, it is necessary to accordingly arrange a one-way stop valve in the flow direction where the solenoid valve cannot be completely “turned off” for coordinated use.
  • the second solenoid valve 238 can be turned off, and the first solenoid valve 236 can be turned on.
  • the second throttle valve assemblies 222a, 222b is configured to provide a controlled throttling degree
  • the first throttle valve assemblies 212a, 212b and the third throttle valve assembly 232 are configured to turn off the flow paths.
  • only the second compressor 233b for providing an evaporation temperature for commodity refrigeration/freezing conditioning is activated.
  • the other part of the refrigerant flows into the second heat exchange flow path 231b through the first solenoid valve 236 to be condensed, and then enters the subcooling heat exchanger 237a to be subcooled. And then, the refrigerant is throttled by the second throttle valve assemblies 222a, 222b and flows into the second indoor heat exchanger sets 221a, 221b to be evaporated. Thus, refrigeration/freezing temperature regulating for the commodities in the storage space is completed. The refrigerant then returns to the two compressors 233a, 233b, thereby completing the entire circulation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP22161182.5A 2020-03-10 2020-12-15 Integriertes wärmepumpensystem und steuerungsverfahren dafür Active EP4040072B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010162191.7A CN113375376A (zh) 2020-03-10 2020-03-10 集成热泵系统及其控制方法
EP20214317.8A EP3879204B1 (de) 2020-03-10 2020-12-15 Integriertes wärmepumpensystem und steuerungsverfahren dafür

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP20214317.8A Division-Into EP3879204B1 (de) 2020-03-10 2020-12-15 Integriertes wärmepumpensystem und steuerungsverfahren dafür
EP20214317.8A Division EP3879204B1 (de) 2020-03-10 2020-12-15 Integriertes wärmepumpensystem und steuerungsverfahren dafür

Publications (2)

Publication Number Publication Date
EP4040072A1 true EP4040072A1 (de) 2022-08-10
EP4040072B1 EP4040072B1 (de) 2024-06-05

Family

ID=73854648

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20214317.8A Active EP3879204B1 (de) 2020-03-10 2020-12-15 Integriertes wärmepumpensystem und steuerungsverfahren dafür
EP22161182.5A Active EP4040072B1 (de) 2020-03-10 2020-12-15 Integriertes wärmepumpensystem und steuerungsverfahren dafür

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20214317.8A Active EP3879204B1 (de) 2020-03-10 2020-12-15 Integriertes wärmepumpensystem und steuerungsverfahren dafür

Country Status (2)

Country Link
EP (2) EP3879204B1 (de)
CN (1) CN113375376A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4328526A1 (de) * 2022-08-25 2024-02-28 Carrier Corporation Wärmepumpensystem und steuerungsverfahren dafür

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113757792B (zh) * 2021-09-28 2022-08-26 美的集团股份有限公司 空调器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2236957A2 (de) * 2009-03-31 2010-10-06 Hitachi Appliances, Inc. Klimaanlage
EP2314954A1 (de) * 2008-06-09 2011-04-27 Daikin Industries, Ltd. Gefriervorrichtung
EP2863153A1 (de) * 2012-10-18 2015-04-22 Daikin Industries, Ltd. Klimaanlage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100225628B1 (ko) * 1997-01-20 1999-10-15 윤종용 멀티형 공기 조화기의 냉매 분배 구조
JP5011957B2 (ja) * 2006-09-07 2012-08-29 ダイキン工業株式会社 空気調和装置
GB2580262B (en) * 2017-10-26 2022-09-14 Mitsubishi Electric Corp Heat sink and circuit device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314954A1 (de) * 2008-06-09 2011-04-27 Daikin Industries, Ltd. Gefriervorrichtung
EP2236957A2 (de) * 2009-03-31 2010-10-06 Hitachi Appliances, Inc. Klimaanlage
EP2863153A1 (de) * 2012-10-18 2015-04-22 Daikin Industries, Ltd. Klimaanlage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4328526A1 (de) * 2022-08-25 2024-02-28 Carrier Corporation Wärmepumpensystem und steuerungsverfahren dafür

Also Published As

Publication number Publication date
EP3879204B1 (de) 2023-05-17
EP4040072B1 (de) 2024-06-05
CN113375376A (zh) 2021-09-10
EP3879204A1 (de) 2021-09-15

Similar Documents

Publication Publication Date Title
US7716941B2 (en) Multi-type air conditioner with defrosting device
JP4477347B2 (ja) 遮断可能な複数の分配機を有するマルチ空気調和機
EP2829821B1 (de) Wärmepumpe
EP4040072A1 (de) Integriertes wärmepumpensystem und steuerungsverfahren dafür
US11519640B2 (en) Air conditioner
CN109386985B (zh) 两管制喷气增焓室外机及多联机系统
CN109442788A (zh) 空调的化霜方法和空调
CN112752933B (zh) 空调系统
CN110131914B (zh) 四通阀和空调系统
KR102080836B1 (ko) 공기조화 시스템
KR101151529B1 (ko) 냉매시스템
JP2010078165A (ja) 冷凍空調装置
CN108088008B (zh) 一种多联机热回收系统及空气调节装置
WO2018074370A1 (ja) 冷凍システムおよび室内ユニット
KR100677267B1 (ko) 냉난 동시형 멀티 공기조화기의 분배유닛
CN108007010B (zh) 一种热泵系统
CN112577103A (zh) 一种多联机空调及其控制方法
KR101146783B1 (ko) 냉매시스템
CN214249792U (zh) 一种多联机空调
CN217844343U (zh) 一种空调冷柜一体式制冷系统
JPH0252964A (ja) 多室形冷凍回路
JPWO2019225005A1 (ja) 熱交換器及び冷凍サイクル装置
CN214249789U (zh) 一种多联机空调
CN220771323U (zh) 一种空调控制系统、空调、多联机控制系统及多联机
JP4244900B2 (ja) 冷凍装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AC Divisional application: reference to earlier application

Ref document number: 3879204

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230105

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: F25B 49/02 20060101ALI20231211BHEP

Ipc: F25B 41/26 20210101ALI20231211BHEP

Ipc: F25B 40/00 20060101ALI20231211BHEP

Ipc: F25B 13/00 20060101ALI20231211BHEP

Ipc: F25B 6/02 20060101ALI20231211BHEP

Ipc: F25B 5/02 20060101AFI20231211BHEP

INTG Intention to grant announced

Effective date: 20240103

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AC Divisional application: reference to earlier application

Ref document number: 3879204

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602020032158

Country of ref document: DE