CN110986405A - Heat exchange assembly, heat exchange system and air conditioning equipment - Google Patents

Heat exchange assembly, heat exchange system and air conditioning equipment Download PDF

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Publication number
CN110986405A
CN110986405A CN201911169877.2A CN201911169877A CN110986405A CN 110986405 A CN110986405 A CN 110986405A CN 201911169877 A CN201911169877 A CN 201911169877A CN 110986405 A CN110986405 A CN 110986405A
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CN
China
Prior art keywords
heat exchange
port
evaporator
condenser
refrigerant
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Granted
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CN201911169877.2A
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Chinese (zh)
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CN110986405B (en
Inventor
罗荣君
张运乾
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Chongqing Midea General Refrigeration Equipment Co Ltd
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Chongqing Midea General Refrigeration Equipment Co Ltd
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Priority to CN201911169877.2A priority Critical patent/CN110986405B/en
Publication of CN110986405A publication Critical patent/CN110986405A/en
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    • 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
    • F25B1/00—Compression machines, plants or systems with non-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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • 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
    • 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
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The invention provides a heat exchange assembly, a heat exchange system and air conditioning equipment, wherein the heat exchange assembly comprises: an evaporator; a condenser; and the heat exchange adjusting device is connected with the evaporator and the condenser and is configured to adjust the heat exchange quantity between the evaporator and the condenser. The heat exchange adjusting device is arranged to adjust the heat exchange quantity between the evaporator and the condenser, so that the heat exchange between the evaporator and the condenser of the heat exchange assembly can be directly or indirectly carried out, the load of a host of the air conditioning equipment using the heat exchange assembly provided by the invention can be effectively adjusted, the temperature of a refrigerant in the condenser is reduced and the temperature of the refrigerant in the evaporator is increased under the condition of low-load operation requirement, the supply quantity of the host is matched with the load quantity used at the tail end, the energy waste caused by excessive supply of the host is avoided, and the energy efficiency ratio of the heat exchange assembly is effectively improved.

Description

Heat exchange assembly, heat exchange system and air conditioning equipment
Technical Field
The invention relates to the technical field of central air-conditioning equipment, in particular to a heat exchange assembly, a heat exchange system and air-conditioning equipment.
Background
In the related art, the air conditioning equipment has a high requirement on the unit load adjustment accuracy of the equipment, and for a water-cooling cold water type air conditioning unit, if the supply of the main machine side exceeds the condition that the end use load is not matched, if the supply of the main machine side exceeds the end use load, energy waste is caused, and the energy-saving operation is not facilitated.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention proposes a heat exchange assembly.
A second aspect of the invention provides a heat exchange system.
A third aspect of the invention proposes an air conditioning apparatus.
In view of the above, a first aspect of the present invention provides a heat exchange assembly, comprising: an evaporator; a condenser; and the heat exchange adjusting device is connected with the evaporator and the condenser and is configured to adjust the heat exchange quantity between the evaporator and the condenser.
In the technical scheme, the heat exchange quantity between the evaporator and the condenser is adjusted by arranging the heat exchange adjusting device, so that the heat exchange can be directly or indirectly carried out between the evaporator and the condenser of the heat exchange assembly, the load quantity of the main machine of the air conditioning equipment using the heat exchange assembly provided by the invention can be effectively adjusted, the temperature of a refrigerant in the condenser is reduced and the temperature of the refrigerant in the evaporator is increased under the condition of low-load operation requirement, the supply quantity of the main machine side is matched with the load quantity used at the tail end, the energy waste caused by excessive supply of the main machine is avoided, and the energy efficiency ratio of the heat exchange assembly is effectively improved.
In addition, the heat exchange assembly in the technical scheme provided by the invention can also have the following additional technical characteristics:
in the above technical solution, the heat exchange adjusting device includes a first port, a second port, a third port and a fourth port; the first port and the second port are connected to a water outlet pipeline of the condenser, and the second port is positioned on one side of the first port, which is far away from the condenser; the third port and the fourth port are connected to the water outlet pipeline of the evaporator, and the fourth port is positioned on one side of the third port, which is far away from the evaporator.
In this technical scheme, heat transfer adjusting device includes four ports, sets up respectively in evaporimeter and condenser outlet pipe way, when concrete application, sets up to be linked together between the different ports according to particular case for carry out direct or indirect heat exchange between the refrigerant that the condenser flows out and the refrigerant that the evaporimeter flows out, realize the accurate regulation to system load.
In any of the above technical solutions, the first port and the fourth port are communicated to form a first refrigerant flow path; the second port is communicated with the third port to form a second refrigerant flow path.
In the technical scheme, a first port and a fourth port of the heat exchange adjusting device are communicated to form a first refrigerant flow path which is communicated with a condenser water outlet pipeline and an evaporator water outlet pipeline; the second port and the third port of the heat exchange adjusting device are connected to form a second refrigerant flow path for communicating the condenser water outlet pipeline and the evaporator water outlet pipeline. One part of the refrigerant discharged by the condenser flows to the water outlet pipeline of the evaporator through the first refrigerant flow path, and the other part of the refrigerant is mixed with the refrigerant discharged by the evaporator flowing out through the second refrigerant flow path, so that the refrigerant of the condenser and the refrigerant of the evaporator perform direct heat exchange in the water outlet pipeline of the condenser. One part of the refrigerant discharged by the evaporator is mixed with the refrigerant discharged by the condenser through the second refrigerant flow path, and the other part of the refrigerant is mixed with the refrigerant discharged by the condenser flowing out of the first refrigerant flow path, so that the refrigerant of the evaporator and the refrigerant of the condenser directly exchange heat in an evaporator water outlet pipeline.
The first refrigerant flow path and the second refrigerant flow path are arranged to enable the refrigerants in the condenser and the evaporator to directly exchange heat, so that the supply quantity of the host side is matched with the load quantity used at the tail end, energy waste caused by excess supply of the host is avoided, and the energy efficiency ratio of the heat exchange assembly is effectively improved. And the heat exchange efficiency of direct heat exchange is higher.
In any of the above technical solutions, the heat exchange adjusting device further includes: the first pump body is arranged in the first refrigerant flow path, the input end of the first pump body is formed into a first port, the output end of the first pump body is connected to a fourth port, and the first pump body is configured to drive the refrigerant in the condenser water outlet pipeline to flow to the evaporator water outlet pipeline; and the second pump body is arranged in the second refrigerant flow path, the input end of the second pump body is formed into a third port, the output end of the second pump body is connected to the second port, and the second pump body is configured to drive the refrigerant in the evaporator water outlet pipeline to flow to the condenser water outlet pipeline.
In the technical scheme, a first pump body is arranged in the first refrigerant flow path, a second pump body is arranged in the second refrigerant flow path, and the first pump body can guide part of refrigerant in the condenser water outlet pipeline into the first refrigerant flow path and enable the part of refrigerant to flow to the evaporator water outlet pipeline. The second pump body can guide part of the refrigerant in the water outlet pipeline of the evaporator to the second refrigerant flow path, and the part of the refrigerant flows to the water outlet pipeline of the condenser, so that direct heat exchange between the evaporator and the refrigerant in the condenser is realized.
The first pump body guides the refrigerant in the first refrigerant flow path from the first port to the fourth port, and the second pump body guides the refrigerant in the second refrigerant flow path from the third port to the fourth port, so that the refrigerants sucked out through the first port and the second port are the refrigerants which are not subjected to mixed heat exchange, and the accurate control of the heat exchange quantity is facilitated.
In any of the above technical solutions, the heat exchange adjusting device further includes: the first throttling device is arranged in the first refrigerant flow path and positioned between the output end and the fourth port of the first pump body, and the first throttling device is configured to adjust the refrigerant flow of the first refrigerant flow path; and the second throttling device is arranged in the second refrigerant flow path and is positioned between the output end and the two ports of the second pump body, and the second throttling device is configured to adjust the refrigerant flow of the second refrigerant flow path.
In the technical scheme, a first throttling device is further arranged in the first refrigerant flow path, a second throttling device is further arranged in the second refrigerant flow path, and the direct heat exchange quantity between the evaporator and the condenser can be effectively controlled by adjusting the opening degrees of the first throttling device and the second throttling device, so that the accurate adjustment of the system load is realized.
Wherein, the first throttling device and the second throttling device can be selected to be electric valves.
In any of the above technical solutions, the first port and the second port are communicated to form a third refrigerant flow path; the third port is communicated with the fourth port to form a fourth refrigerant flow path; the heat exchange adjusting device further comprises an intermediate heat exchanger, and the third refrigerant flow path and the fourth refrigerant flow path exchange heat through the intermediate heat exchanger.
In the technical scheme, the first port and the second port of the heat exchange adjusting device are connected to form a third refrigerant flow path which is in bypass with the water outlet pipeline of the condenser. And the third port and the fourth port of the heat exchange adjusting device are connected to form a fourth refrigerant flow path which is in bypass with the water outlet pipeline of the evaporator. The heat exchange adjusting device further comprises an intermediate heat exchanger, part of the refrigerant in the condenser water outlet pipeline passes through the third refrigerant flow path and indirectly exchanges heat with part of the refrigerant flowing out of the evaporator water outlet pipeline through the fourth refrigerant flow path through the intermediate heat exchanger, so that the supply quantity of the host side is matched with the load quantity of the tail end, energy waste caused by excess supply of the host is avoided, and the energy efficiency ratio of the heat exchange assembly is effectively improved. The indirect heat exchange can avoid the influence on the flow speed and the flow of the pipeline caused by the pressure difference when the water outlet pipeline of the condenser is communicated with the water outlet pipeline of the evaporator.
In any of the above technical solutions, the heat exchange adjusting device further includes: the third pump body is arranged in a third refrigerant flow path, the input end of the third pump body is formed into a first port, the output end of the third pump body is connected to a second port, and the third pump body is configured to drive the refrigerant in the condenser water outlet pipeline to flow through the intermediate heat exchanger; and the fourth pump body is arranged in a fourth refrigerant flow path, the input end of the fourth pump body is formed into a third port, the output end of the fourth pump body is connected to the fourth port, and the fourth pump body is configured to drive the refrigerant in the evaporator water inlet pipeline to flow through the intermediate heat exchanger.
In the technical scheme, a third pump body is arranged in a third refrigerant flow path, a fourth pump body is arranged in a fourth refrigerant flow path, the third pump body can guide part of the refrigerant in a condenser water outlet pipeline into the third refrigerant flow path and flow into the intermediate heat exchanger through the third refrigerant flow path, so that the part of the refrigerant can exchange heat with part of the refrigerant guided by the fourth pump body and the fourth refrigerant flow path through an evaporator water outlet pipeline, and further direct heat exchange between the evaporator and the refrigerant in the condenser is realized.
The third pump body guides the refrigerant in the third refrigerant flow path from the first port to the fourth port, and the fourth pump body guides the refrigerant in the fourth refrigerant flow path from the third port to the fourth port, so that the refrigerants sucked out through the first port and the second port are all the refrigerants which do not exchange heat indirectly, and the heat exchange quantity can be accurately controlled.
In any of the above technical solutions, the heat exchange adjusting device further includes: the third throttling device is arranged in the third refrigerant flow path and positioned between the output end and the second port of the third pump body, and the third throttling device is configured to adjust the refrigerant flow of the third refrigerant flow path; and the fourth throttling device is arranged in the fourth refrigerant flow path and is positioned between the output end of the fourth pump body and the three ports, and the fourth throttling device is configured to adjust the refrigerant flow of the fourth refrigerant flow path.
In the technical scheme, a third throttling device is further arranged in the third refrigerant flow path, a fourth throttling device is further arranged in the fourth refrigerant flow path, and the direct heat exchange quantity between the evaporator and the condenser can be effectively controlled by adjusting the opening degrees of the third throttling device and the fourth throttling device, so that the accurate adjustment of the system load is realized.
Wherein, the third throttling element and the fourth throttling element can be selected as electric valves.
In any of the above technical solutions, the intermediate heat exchanger includes: the first heat exchanger is arranged between the third pump body and the third throttling element; the second heat exchanger is arranged between the fourth pump body and the fourth throttling device; and the first heat exchanger and the second heat exchanger are arranged in the heat exchange cavity, and exchange heat through the heat exchange cavity.
In the technical scheme, the intermediate heat exchanger comprises a first heat exchanger, a second heat exchanger and a heat exchange cavity. After the refrigerant in the first flow path flows into the first heat exchanger, the refrigerant exchanges heat with the refrigerant flowing into the second heat exchanger in the second flow path. The first heat exchanger and the second heat exchanger can be plate heat exchangers, disc heat exchangers or heat exchange tubes. The heat exchange efficiency between the first heat exchanger and the second heat exchanger can be increased by arranging the heat exchange cavity.
In any one of the above technical solutions, the heat exchange assembly further includes: the temperature measuring assembly is arranged on the condenser and the evaporator and is configured to obtain the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator; the heat exchange adjusting device is configured to adjust the heat exchange amount according to the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator.
In the technical scheme, the temperature measuring assembly obtains the refrigerant temperature of the condenser, and obtains the refrigerant temperature of the evaporator, the upper computer determines the target temperatures of the condenser and the evaporator according to the refrigerant temperature of the condenser, the refrigerant temperature of the evaporator and the system load amount of the current demand, and controls the heat exchange adjusting device to adjust the heat exchange amount of the condenser and the evaporator, so that the temperature of the condenser and the temperature of the evaporator are respectively close to the corresponding target temperatures, and further the supply amount of the host side is ensured to be matched with the load amount of the end use, and the energy waste caused by the surplus host supply is avoided.
A second aspect of the present invention provides a heat exchange system, comprising: a compressor; according to the heat exchange assembly provided by any one of the technical schemes, the heat exchange assembly is connected with the compressor; a memory configured to store a computer program; a processor coupled to the memory, the heat exchange assembly, and the compressor, the processor configured to execute a computer program to: and controlling the heat exchange adjusting device to adjust the running frequency of the compressor and/or the heat exchange quantity between the evaporator and the condenser according to the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator in the heat exchange assembly, so that the adjusting device adjusts the refrigerant temperature of the condenser and/or the refrigerant temperature of the evaporator.
In this technical scheme, heat exchange system includes the heat exchange assembly who provides in above-mentioned any technical scheme, therefore this heat exchange system includes the whole beneficial effect of the heat exchange assembly who provides in above-mentioned any technical scheme simultaneously, no longer gives details here.
Furthermore, according to the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator in the heat exchange assembly, the heat exchange adjusting device is controlled to adjust the operating frequency of the compressor and/or the heat exchange quantity between the evaporator and the condenser, the temperature of the evaporator and the temperature of the condenser can be accurately adjusted, the supply quantity of the host side is matched with the load quantity of the tail end, and energy waste caused by excess supply of the host is avoided.
The invention provides air conditioning equipment, which comprises the heat exchange system and an electric control device, wherein the heat exchange system is connected with the electric control device, and the electric control device comprises a memory and a processor. Therefore, the air conditioning equipment comprises all the beneficial effects of the heat exchange system provided in any one of the above technical solutions, and the description is omitted here.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic structural view of a heat exchange assembly according to one embodiment of the present invention;
FIG. 2 shows a schematic structural view of a heat exchange assembly according to another embodiment of the present invention;
FIG. 3 shows a block diagram of a heat exchange system according to an embodiment of the present invention;
fig. 4 shows a block diagram of an air conditioner according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
102 evaporator, 104 condenser, 106 heat exchange regulating device, 1062 first port, 1064 second port, 1066 third port, 1068 fourth port, 108 condenser water outlet pipeline, 110 evaporator water outlet pipeline, 112 first refrigerant flow path, 1122 first pump body, 1124 first throttling device, 114 second refrigerant flow path, 1142 second pump body, 1144 second throttling device, 116 third refrigerant flow path, 1162 third pump body, 1164 third throttling device, 118 fourth refrigerant flow path, 1182 fourth pump body, 1184 fourth throttling device, 120 intermediate heat exchanger, 1202 first heat exchanger, 1204 second heat exchanger, 1206 heat exchange cavity.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The heat exchange assembly, the heat exchange system and the air conditioning apparatus according to some embodiments of the present invention will be described with reference to fig. 1 to 4.
The first embodiment is as follows:
in one embodiment of the present invention, as shown in fig. 1, there is provided a heat exchange assembly comprising: an evaporator 102; a condenser 104; and a heat exchange regulation device 106, wherein the heat exchange regulation device 106 is connected with the evaporator 102 and the condenser 104, and the heat exchange regulation device 106 is configured and adapted to regulate the heat exchange quantity between the evaporator 102 and the condenser 104.
Wherein, the heat exchange adjusting device 106 comprises a first port 1062, a second port 1064, a third port 1066 and a fourth port 1068; wherein the first port 1062 and the second port 1064 are connected to the condenser outlet pipe 108, and the second port 1064 is located at a side of the first port 1062 away from the condenser 104; the third port 1066 and the fourth port 1068 are connected to the evaporator outlet conduit 110, and the fourth port 1068 is located on the side of the third port 1066 remote from the evaporator 102.
The first port 1062 communicates with the fourth port 1068 to form a first refrigerant flow path 112; the second port 1064 communicates with the third port 1066 to form the second refrigerant flow path 114.
In some embodiments, the heat exchange conditioning apparatus 106 further comprises: the first pump body 1122 is disposed in the first refrigerant flow path 112, an input end of the first pump body 1122 is formed as a first port 1062, an output end of the first pump body 1122 is connected to a fourth port 1068, and the first pump body 1122 is configured to drive the refrigerant in the condenser water outlet pipeline 108 to flow to the evaporator water outlet pipeline 110; the second pump body 1142 is disposed in the second refrigerant flow path 114, an input end of the second pump body 1142 is formed as a third port 1066, an output end of the second pump body 1142 is connected to the second port 1064, and the second pump body 1142 is configured to drive the refrigerant in the evaporator water outlet pipeline 110 to flow to the condenser water outlet pipeline 108.
In some embodiments, the heat exchange conditioning apparatus 106 further comprises: a first throttling device 1124 disposed in the first refrigerant flow path 112 and located between the output end of the first pump body 1122 and the fourth port 1068, wherein the first throttling device 1124 is configured to adjust a refrigerant flow rate of the first refrigerant flow path 112; the second throttling element 1144 is disposed in the second refrigerant flow path 114 and located between the output end and the two ports of the second pump body 1142, and the second throttling element 1144 is configured to adjust the refrigerant flow rate of the second refrigerant flow path 114.
The heat exchange assembly further comprises: the temperature measuring assembly is arranged on the condenser 104 and the evaporator 102 and is configured to obtain the refrigerant temperature of the condenser 104 and the refrigerant temperature of the evaporator 102; the heat exchange adjusting device 106 is configured to adjust the heat exchange amount according to the refrigerant temperature of the condenser 104 and the refrigerant temperature of the evaporator 102.
In this embodiment, the heat exchange between the condenser 104 and the evaporator 102 is performed by direct heat exchange.
Specifically, the heat exchange adjustment device 106 includes four ports, which are respectively disposed on the evaporator 102 and the condenser water outlet pipeline 108, wherein the first port 1062 is communicated with the fourth port 1068 to form a first refrigerant flow path 112 for communicating the condenser water outlet pipeline 108 with the evaporator water outlet pipeline 110; the second port 1064 is connected to the third port 1066 to form a second refrigerant flow path 114 that connects the condenser outlet line 108 to the evaporator outlet line 110.
A portion of the refrigerant discharged from the condenser 104 flows through the first refrigerant flow path 112 to the evaporator water outlet line 110, and the other portion of the refrigerant is mixed with the refrigerant discharged from the evaporator 102 flowing through the second refrigerant flow path 114, so that the condenser 104 refrigerant and the evaporator 102 refrigerant exchange heat directly in the condenser water outlet line 108. One part of the refrigerant discharged from the evaporator 102 is mixed with the refrigerant discharged from the condenser 104 through the second refrigerant flow path 114, and the other part of the refrigerant is mixed with the refrigerant discharged from the condenser 104 flowing out through the first refrigerant flow path 112, so that the refrigerant of the evaporator 102 and the refrigerant of the condenser 104 directly exchange heat in the evaporator water outlet pipeline 110.
The first pump 1122 is disposed in the first refrigerant flow path 112, the second pump 1142 is disposed in the second refrigerant flow path 114, and the first pump 1122 is capable of guiding a portion of the refrigerant in the condenser outlet pipe 108 to the first refrigerant flow path 112 and flowing the portion of the refrigerant to the evaporator outlet pipe 110. The second pump body 1142 can guide a portion of the refrigerant in the evaporator water outlet pipeline 110 to the second refrigerant flow path 114, and make the portion of the refrigerant flow toward the condenser water outlet pipeline 108, thereby achieving direct heat exchange between the refrigerant in the evaporator 102 and the refrigerant in the condenser 104.
The first pump body 1122 guides the refrigerant in the first refrigerant flow path 112 from the first port 1062 to the fourth port 1068, and the second pump body 1142 guides the refrigerant in the second refrigerant flow path 114 from the third port 1066 to the fourth port 1068, so that the refrigerants sucked out through the first port 1062 and the second port 1064 are both the refrigerants which are not subjected to mixed heat exchange, which is beneficial to accurately controlling the amount of heat exchange.
In some embodiments, the first refrigerant flow path 112 is further provided with a first throttling device 1124, the second refrigerant flow path 114 is further provided with a second throttling device 1144, and the direct heat exchange amount between the evaporator 102 and the condenser 104 can be effectively controlled by adjusting the opening degrees of the first throttling device 1124 and the second throttling device 1144, so as to realize accurate adjustment of the system load.
Wherein, the first throttling component 1124 and the second throttling component 1144 can be selected as electric valves.
The temperature measuring component obtains the refrigerant temperature of the condenser 104 and obtains the refrigerant temperature of the evaporator 102, the upper computer determines the target temperatures of the condenser 104 and the evaporator 102 according to the refrigerant temperature of the condenser 104, the refrigerant temperature of the evaporator 102 and the currently required system load, and controls the heat exchange adjusting device 106 to adjust the heat exchange amount of the condenser 104 and the evaporator 102, so that the temperature of the condenser 104 and the temperature of the evaporator 102 are respectively close to the corresponding target temperatures, the supply amount of the host side is further ensured to be matched with the load amount of the terminal use, and energy waste caused by excessive supply of the host is avoided.
In the embodiment of the invention, the heat exchange quantity between the evaporator 102 and the condenser 104 is adjusted by arranging the heat exchange adjusting device 106, so that the heat exchange between the evaporator 102 and the condenser 104 of the heat exchange assembly can be directly or indirectly carried out, the load quantity of a host of the air conditioning equipment using the heat exchange assembly provided by the invention can be effectively adjusted, the temperature of the refrigerant in the condenser 104 is reduced and the temperature of the refrigerant in the evaporator 102 is increased under the condition of low-load operation requirement, the supply quantity of the host side is matched with the load quantity used at the tail end, the energy waste caused by excessive supply of the host is avoided, and the energy efficiency ratio of the heat exchange assembly is effectively improved.
The first refrigerant flow path 112 and the second refrigerant flow path 114 are arranged to directly exchange heat between the refrigerant in the condenser 104 and the refrigerant in the evaporator 102, so that the supply quantity of the host side is matched with the load quantity used at the tail end, energy waste caused by excess supply of the host is avoided, and the energy efficiency ratio of the heat exchange assembly is effectively improved. And the heat exchange efficiency of direct heat exchange is higher.
Example two:
in one embodiment of the present invention, as shown in fig. 2, there is provided a heat exchange assembly comprising: an evaporator 102; a condenser 104; and a heat exchange regulation device 106, wherein the heat exchange regulation device 106 is connected with the evaporator 102 and the condenser 104, and the heat exchange regulation device 106 is configured and adapted to regulate the heat exchange quantity between the evaporator 102 and the condenser 104.
Wherein, the heat exchange adjusting device 106 comprises a first port 1062, a second port 1064, a third port 1066 and a fourth port 1068; wherein the first port 1062 and the second port 1064 are connected to the condenser outlet pipe 108, and the second port 1064 is located at a side of the first port 1062 away from the condenser 104; the third port 1066 and the fourth port 1068 are connected to the evaporator outlet conduit 110, and the fourth port 1068 is located on the side of the third port 1066 remote from the evaporator 102.
The first port 1062 is communicated with the second port 1064 to form a third refrigerant flow path 116; the third port 1066 is communicated with the fourth port 1068 to form a fourth refrigerant flow path 118; the heat exchange adjustment device 106 further includes an intermediate heat exchanger 120, and the third refrigerant flow path 116 and the fourth refrigerant flow path 118 exchange heat through the intermediate heat exchanger 120.
The heat exchange adjusting device 106 further comprises: a third pump 1162 disposed in the third refrigerant flow path 116, an input end of the third pump 1162 is formed as a first port 1062, an output end of the third pump 1162 is connected to the second port 1064, and the third pump 1162 is configured to drive the refrigerant in the condenser outlet pipe 108 to flow through the intermediate heat exchanger 120; the fourth pump 1182 is disposed in the fourth refrigerant flow path 118, an input end of the fourth pump 1182 is formed as a third port 1066, an output end of the fourth pump 1182 is connected to the fourth port 1068, and the fourth pump 1182 is configured to drive the refrigerant in the water inlet pipeline of the evaporator 102 to flow through the intermediate heat exchanger 120.
The heat exchange adjusting device 106 further comprises: a third throttling element 1164 disposed in the third refrigerant flow path 116 and located between the output end of the third pump body 1162 and the second port 1064, wherein the third throttling element 1164 is configured to adjust the refrigerant flow rate of the third refrigerant flow path 116; the fourth throttling device 1184 is disposed in the fourth refrigerant flow path 118 and located between the output end of the fourth pump body 1182 and the three ports, and the fourth throttling device 1184 is configured to adjust the refrigerant flow rate of the fourth refrigerant flow path 118.
The intermediate heat exchanger 120 includes: a first heat exchanger 1202 disposed between the third pump body 1162 and the third throttle device 1164; a second heat exchanger 1204, disposed between the fourth pump body 1182 and the fourth throttle device 1184; the heat exchange cavity 1206, the first heat exchanger 1202 and the second heat exchanger 1204 are located in the heat exchange cavity 1206, and the first heat exchanger 1202 and the second heat exchanger 1204 exchange heat through the heat exchange cavity 1206.
The heat exchange assembly further comprises: the temperature measuring assembly is arranged on the condenser 104 and the evaporator 102 and is configured to obtain the refrigerant temperature of the condenser 104 and the refrigerant temperature of the evaporator 102; the heat exchange adjusting device 106 is configured to adjust the heat exchange amount according to the refrigerant temperature of the condenser 104 and the refrigerant temperature of the evaporator 102.
In this embodiment, the heat exchange between the condenser 104 and the evaporator 102 is performed by indirect heat exchange.
Specifically, the heat exchanging regulator 106 includes four ports respectively disposed on the evaporator 102 and the condenser outlet pipe 108, and the first port 1062 is connected to the second port 1064 to form a third refrigerant flow path 116 bypassing the condenser outlet pipe 108. The third port 1066 and the fourth port 1068 are connected to form a fourth refrigerant flow path 118 bypassing the evaporator outlet line 110.
The third pump 1162 is disposed in the third refrigerant flow path 116, the fourth refrigerant flow path 118 is disposed with the fourth pump 1182, and the third pump 1162 can guide a part of the refrigerant in the condenser water outlet pipeline 108 to the third refrigerant flow path 116, and flow into the intermediate heat exchanger 120 through the third refrigerant flow path 116, so that the part of the refrigerant can exchange heat with a part of the refrigerant guided by the fourth pump 1182 and the fourth refrigerant flow path 118 through the evaporator water outlet pipeline 110, thereby achieving direct heat exchange between the refrigerant in the evaporator 102 and the refrigerant in the condenser 104.
The third pump body 1162 guides the refrigerant in the third refrigerant flow path 116 from the first port 1062 to the fourth port 1068, and the fourth pump body 1182 guides the refrigerant in the fourth refrigerant flow path 118 from the third port 1066 to the fourth port 1068, so that the refrigerants sucked out through the first port 1062 and the second port 1064 are all the refrigerants without indirect heat exchange, which is beneficial to accurately controlling the amount of heat exchange.
In some embodiments, the third refrigerant flow path 116 is further provided with a third throttling device 1164, the fourth refrigerant flow path 118 is further provided with a fourth throttling device 1184, and the direct heat exchange amount between the evaporator 102 and the condenser 104 can be effectively controlled by adjusting the opening degrees of the third throttling device 1164 and the fourth throttling device 1184, so as to realize accurate adjustment of the system load.
Wherein, the third throttling device 1164 and the fourth throttling device 1184 may be selected as electric valves.
The intermediate heat exchanger 120 includes a first heat exchanger 1202, a second heat exchanger 1204, and a heat exchange chamber 1206. After the refrigerant in the first flow path flows into the first heat exchanger 1202, heat exchange is performed with the refrigerant flowing into the second heat exchanger 1204 in the second flow path. The first heat exchanger 1202 and the second heat exchanger 1204 may be plate heat exchangers, disc heat exchangers, or heat exchange tubes. The heat exchange efficiency between the first heat exchanger 1202 and the second heat exchanger 1204 can be increased by providing the heat exchange chamber 1206.
The temperature measuring component obtains the refrigerant temperature of the condenser 104 and obtains the refrigerant temperature of the evaporator 102, the upper computer determines the target temperatures of the condenser 104 and the evaporator 102 according to the refrigerant temperature of the condenser 104, the refrigerant temperature of the evaporator 102 and the currently required system load, and controls the heat exchange adjusting device 106 to adjust the heat exchange amount of the condenser 104 and the evaporator 102, so that the temperature of the condenser 104 and the temperature of the evaporator 102 are respectively close to the corresponding target temperatures, the supply amount of the host side is further ensured to be matched with the load amount of the terminal use, and energy waste caused by excessive supply of the host is avoided.
In the embodiment of the invention, the heat exchange quantity between the evaporator 102 and the condenser 104 is adjusted by arranging the heat exchange adjusting device 106, so that the heat exchange between the evaporator 102 and the condenser 104 of the heat exchange assembly can be directly or indirectly carried out, the load quantity of a host of the air conditioning equipment using the heat exchange assembly provided by the invention can be effectively adjusted, the temperature of the refrigerant in the condenser 104 is reduced and the temperature of the refrigerant in the evaporator 102 is increased under the condition of low-load operation requirement, the supply quantity of the host side is matched with the load quantity used at the tail end, the energy waste caused by excessive supply of the host is avoided, and the energy efficiency ratio of the heat exchange assembly is effectively improved.
By arranging the intermediate heat exchanger 120 in the heat exchange adjusting device 106, part of the refrigerant in the condenser water outlet pipeline 108 passes through the third refrigerant flow path 116, and indirect heat exchange is performed between the part of the refrigerant flowing out of the evaporator water outlet pipeline 110 through the fourth refrigerant flow path 118 and the intermediate heat exchanger 120, so that the supply quantity of the host side is matched with the load quantity of the terminal user, energy waste caused by excess supply of the host is avoided, and the energy efficiency ratio of the heat exchange assembly is effectively improved. Indirect heat exchange avoids the effect of differential pressure on the flow rate of the condenser outlet line 108 and the evaporator outlet line 110 when they are in communication.
Example three:
as shown in fig. 1 and fig. 2, in the embodiment of the present invention, a heat exchange assembly is disposed in a water-cooled cold water type air conditioning unit for illustration, wherein the principle of energy adjustment in the heat exchange assembly is specifically as follows:
the method is characterized in that a direct communication heat exchange or indirect communication heat exchange mode is adopted between an evaporator 102 water path system and a water-cooled condenser 104 water path system of the water-cooled cold water type air conditioning unit, so that direct or indirect heat exchange is carried out between water in the evaporator 102 and water in the condenser 104, the temperature of cooling water in the condenser 104 is reduced, the temperature of freezing water in the evaporator 102 is increased, and the water temperature of the evaporator 102 and the water temperature of the condenser 104 are controlled by adjusting the water flow rate of heat exchange between the evaporator 102 and the condenser 104, so that the purpose of adjusting the running load of the water chilling unit is achieved, and the water chilling unit can run in a lower load state.
Specifically, the energy conditioning may be classified into a direct-communication direct heat exchange type and a non-direct-communication indirect heat exchange type.
As shown in fig. 1, a water pump is added between a water path system of an evaporator 102 and a water path system of a water-cooled condenser 104 of a water-cooled cold water type air conditioning unit to provide power for bypassing water against resistance, an electric valve is added to control the water flow of the water path for bypassing, meanwhile, the added equipment and pipelines are all integrally installed on the water chilling unit to form a part of the water chilling unit, so that the water in the evaporator 102 and the water in the condenser 104 are directly bypassed to exchange heat, the temperature of the cooling water in the condenser 104 is reduced, the temperature of the frozen water in the evaporator 102 is increased, the water temperature of the evaporator 102 and the water temperature of the condenser 104 are controlled by adjusting the water flow rate of the evaporator 102 and the condenser 104 through the bypass direct heat exchange, therefore, the purpose of adjusting the running load of the water chilling unit is achieved, and the water chilling unit can run in a lower load state.
As shown in fig. 2, an intermediate heat exchanger 120 is added between a water path system of an evaporator 102 and a water path system of a condenser 104 of a water-cooling cold water type air conditioning unit to perform heat exchange without direct contact, a water pump is added to provide power for water to overcome resistance and enter the intermediate heat exchanger 120, an electric valve is added to control water flow of the water path and enter the intermediate heat exchanger 120, and simultaneously added equipment and pipelines are all integrally installed on the water cooling unit to form a part of the water cooling unit, so that the water in the evaporator 102 and the water in the condenser 104 indirectly exchange heat through the intermediate heat exchanger 120, the temperature of cooling water in the condenser 104 is reduced, the temperature of freezing water in the evaporator 102 is increased, and the water flow of the evaporator 102 and the water flow of the condenser 104 indirectly exchanging heat through the intermediate heat exchanger 120 are adjusted to control the water temperature of the evaporator 102 and the water temperature of the condenser, therefore, the purpose of adjusting the running load of the water chilling unit is achieved, and the water chilling unit can run in a lower load state.
The type of compressor of the air conditioning unit is not limited to centrifugal, screw, scroll, piston, etc.
The heat exchange assembly provided by the invention can enable the main machine load and the tail end load of the air conditioning unit to be matched more quickly, can accurately control the temperature of inlet and outlet water of the air conditioning water chilling unit, is suitable for different application working conditions and occasions, and can better solve the problems that the main machine load and the tail end load are not matched, namely the main machine side supply load is large and the tail end side use load is small.
Example four:
as shown in fig. 3, in one embodiment of the present invention, there is provided a heat exchange system 300 comprising: a compressor 302; as with the heat exchange assembly provided in any of the embodiments above, the heat exchange assembly is coupled to the compressor 302; a memory 304 configured to store a computer program; a processor 306 coupled to the memory 304, the heat exchange assembly, and the compressor 302, the processor 306 configured to execute computer programs to: according to the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator in the heat exchange assembly, the heat exchange adjusting device is controlled to adjust the operating frequency of the compressor 302 and/or the heat exchange amount between the evaporator and the condenser, so that the adjusting device adjusts the refrigerant temperature of the condenser and/or the refrigerant temperature of the evaporator.
In this embodiment, the heat exchange system includes the heat exchange assembly provided in any one of the above embodiments, and therefore the heat exchange system includes all the beneficial effects of the heat exchange assembly provided in any one of the above embodiments, which are not described herein again.
Furthermore, according to the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator in the heat exchange assembly, the heat exchange adjusting device is controlled to adjust the operating frequency of the compressor and/or the heat exchange quantity between the evaporator and the condenser, the temperature of the evaporator and the temperature of the condenser can be accurately adjusted, the supply quantity of the host side is matched with the load quantity of the tail end, and energy waste caused by excess supply of the host is avoided.
Example five:
as shown in fig. 4, in an embodiment of the present invention, an air conditioning apparatus 400 is provided, which includes the heat exchange system 300 provided in any of the above solutions, and an electronic control device 402 connected to the heat exchange system 300, wherein the electronic control device 402 includes a memory 304 and a processor 306. Therefore, the air conditioning equipment 400 includes all the advantages of the heat exchange system 300 provided in any of the above technical solutions, which are not described herein again.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A heat exchange assembly, comprising:
an evaporator;
a condenser; and
the heat exchange adjusting device is connected with the evaporator and the condenser and is configured to adjust the heat exchange amount between the evaporator and the condenser.
2. The heat exchange assembly of claim 1, wherein the heat exchange conditioning device comprises a first port, a second port, a third port, and a fourth port;
wherein the first port and the second port are connected to the condenser water outlet pipeline, and the second port is positioned on the side of the first port far away from the condenser;
the third port and the fourth port are connected to the water outlet pipeline of the evaporator, and the fourth port is located on one side, far away from the evaporator, of the third port.
3. The heat exchange assembly of claim 2, wherein the first port and the fourth port communicate to form a first refrigerant flow path;
the second port is communicated with the third port to form a second refrigerant flow path.
4. The heat exchange assembly of claim 3, wherein the heat exchange conditioning device further comprises:
the first pump body is arranged in the first refrigerant flow path, the input end of the first pump body is formed into the first port, the output end of the first pump body is connected to the fourth port, and the first pump body is configured to drive the refrigerant in the condenser water outlet pipeline to flow to the evaporator water outlet pipeline;
the second pump body is arranged in the second refrigerant flow path, the input end of the second pump body is formed into the third port, the output end of the second pump body is connected to the second port, and the second pump body is configured to drive the refrigerant in the evaporator water outlet pipeline to flow to the condenser water outlet pipeline.
5. The heat exchange assembly of claim 4, wherein the heat exchange conditioning device further comprises:
the first throttling device is arranged in the first refrigerant flow path and positioned between the output end of the first pump body and the fourth port, and the first throttling device is configured to adjust the refrigerant flow of the first refrigerant flow path;
and the second throttling device is arranged in the second refrigerant flow path and is positioned between the output end of the second pump body and the two ports, and the second throttling device is configured to adjust the refrigerant flow of the second refrigerant flow path.
6. The heat exchange assembly of claim 2, wherein the first port communicates with the second port to form a third refrigerant flow path;
the third port is communicated with the fourth port to form a fourth refrigerant flow path;
the heat exchange adjusting device further comprises an intermediate heat exchanger, and the third refrigerant flow path and the fourth refrigerant flow path exchange heat through the intermediate heat exchanger.
7. The heat exchange assembly of claim 6, wherein the heat exchange conditioning device further comprises:
the third pump body is arranged in the third refrigerant flow path, the input end of the third pump body is formed into the first port, the output end of the third pump body is connected to the second port, and the third pump body is configured to drive the refrigerant in the condenser water outlet pipeline to flow through the intermediate heat exchanger;
and the fourth pump body is arranged in the fourth refrigerant flow path, the input end of the fourth pump body is formed into the third port, the output end of the fourth pump body is connected to the fourth port, and the fourth pump body is configured to drive the refrigerant in the evaporator water inlet pipeline to flow through the intermediate heat exchanger.
8. The heat exchange assembly of claim 7, wherein the heat exchange conditioning device further comprises:
the third throttling device is arranged in the third refrigerant flow path and positioned between the output end of the third pump body and the second port, and the third throttling device is configured to adjust the refrigerant flow of the third refrigerant flow path;
and the fourth throttling device is arranged in the fourth refrigerant flow path and is positioned between the output end of the fourth pump body and the three ports, and the fourth throttling device is configured to adjust the refrigerant flow of the fourth refrigerant flow path.
9. The heat exchange assembly of claim 8, wherein the intermediate heat exchanger comprises:
a first heat exchanger disposed between the third pump body and the third throttle member;
the second heat exchanger is arranged between the fourth pump body and the fourth throttling device;
and the first heat exchanger and the second heat exchanger are both positioned in the heat exchange cavity, and the first heat exchanger and the second heat exchanger exchange heat through the heat exchange cavity.
10. The heat exchange assembly of any one of claims 1 to 9, further comprising:
the temperature measuring assembly is arranged on the condenser and the evaporator and is configured to obtain the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator;
the heat exchange adjusting device is configured to adjust the heat exchange amount according to the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator.
11. A heat exchange system, comprising:
a compressor;
a heat exchange assembly according to any one of claims 1 to 10 connected to the compressor;
a memory configured to store a computer program;
a processor coupled to the memory, the heat exchange assembly, and the compressor, the processor configured to execute the computer program to:
and controlling a heat exchange adjusting device to adjust the running frequency of the compressor and/or the heat exchange quantity between the evaporator and the condenser according to the refrigerant temperature of the condenser and the refrigerant temperature of the evaporator in the heat exchange assembly, so that the adjusting device adjusts the refrigerant temperature of the condenser and/or the refrigerant temperature of the evaporator.
12. An air conditioning apparatus, characterized by comprising:
the heat exchange system of claim 11; and
and the electric control device is connected with the heat exchange system and comprises a memory and a processor.
CN201911169877.2A 2019-11-26 2019-11-26 Heat exchange assembly, heat exchange system and air conditioning equipment Active CN110986405B (en)

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CN112212461A (en) * 2020-09-10 2021-01-12 珠海格力电器股份有限公司 Central air-conditioning system and control method thereof
CN112283817A (en) * 2020-09-17 2021-01-29 珠海格力电器股份有限公司 Central air-conditioning system and control method thereof

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CN1356519A (en) * 2000-11-15 2002-07-03 开利公司 High-pressure regulation in saving-type cross-critical steam compression cycle
KR100531187B1 (en) * 2004-06-04 2005-12-05 주식회사 특허뱅크 Combination type cooling and heating apparatus
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CN112212461A (en) * 2020-09-10 2021-01-12 珠海格力电器股份有限公司 Central air-conditioning system and control method thereof
CN112283817A (en) * 2020-09-17 2021-01-29 珠海格力电器股份有限公司 Central air-conditioning system and control method thereof

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