CN106568167B - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
- Publication number
- CN106568167B CN106568167B CN201610957244.8A CN201610957244A CN106568167B CN 106568167 B CN106568167 B CN 106568167B CN 201610957244 A CN201610957244 A CN 201610957244A CN 106568167 B CN106568167 B CN 106568167B
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- air conditioner
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- outdoor unit
- indoor
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003507 refrigerant Substances 0.000 claims abstract description 63
- 238000010257 thawing Methods 0.000 claims description 16
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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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
- 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
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- F25B2313/02332—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements during defrosting
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
- F25B2313/02532—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements during defrosting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning system and a control method. The air conditioning system comprises a plurality of air conditioners, each air conditioner comprises an outdoor unit and an indoor unit, and the air conditioning system further comprises a switching assembly used for switching the indoor unit in any one of the air conditioners to be connected with the outdoor unit of the other air conditioner to form a refrigerant circulation loop. The air conditioning system provided by the invention is provided with the switching assembly, when the outdoor unit of one air conditioner breaks down, the indoor unit of the broken-down air conditioner can be switched to be connected with the outdoor units of other air conditioners to form a refrigerant circulation loop, and the normal operation of the indoor unit is maintained by means of the outdoor units of other air conditioners, so that the normal operation of the indoor unit is not influenced in the maintenance stage of the outdoor unit, and the air conditioning requirement of a user is met.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system and a control method thereof.
Background
The existing household air conditioner cannot be started and operated normally when the outdoor unit of the existing household air conditioner leaks refrigerants and system components are in fault, fault detection and maintenance need a certain time, and a user cannot normally use the air conditioner to adjust the indoor temperature in the period, so that the user experience is influenced.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide an air conditioning system and a control method thereof that does not affect the indoor air conditioning when an outdoor unit fails.
In a first aspect, an air conditioning system is provided.
An air conditioning system comprises a plurality of air conditioners, each air conditioner comprises an outdoor unit and an indoor unit, and the air conditioning system further comprises a switching assembly, wherein the switching assembly is used for switching the indoor unit in any one air conditioner to be connected with the outdoor unit of the other air conditioner to form a refrigerant circulation loop;
wherein,
the switching assembly is used for switching the indoor unit of any one of the air conditioners between connection with the outdoor unit of the air conditioner and connection with the outdoor unit of the other air conditioner; or,
the switching assembly is used for connecting the outdoor unit and the indoor unit of any two air conditioners in an exchange manner; or,
the switching component is used for switching the indoor unit of any one of the air conditioners to be connected with the indoor unit of the other air conditioner in parallel or replace the indoor unit of the other air conditioner.
Preferably, the air conditioning system includes a first air conditioner and a second air conditioner, the first air conditioner includes a first outdoor unit and a first indoor unit, the second air conditioner includes a second outdoor unit and a second indoor unit, and the switching component is configured to switch the air conditioning system between a first connection state and a second connection state;
the first connection state is that the first outdoor unit is connected with the first indoor unit, and the second outdoor unit is connected with the second indoor unit;
the second connection state is that the first outdoor unit is connected with the second indoor unit, and the second outdoor unit is connected with the first indoor unit.
Preferably, the switching assembly includes a first four-way valve and a second four-way valve, the first outdoor unit, the first indoor unit, the second outdoor unit, and the second indoor unit each have two refrigerant inlets and outlets, four interfaces of the first four-way valve are respectively connected to one of the refrigerant inlets and outlets of the first outdoor unit, the first indoor unit, the second outdoor unit, and the second indoor unit, and four interfaces of the second four-way valve are respectively connected to the other refrigerant inlet and outlet of the first outdoor unit, the first indoor unit, the second outdoor unit, and the second indoor unit.
Preferably, the indoor units of the plurality of air conditioners are respectively disposed in different indoor spaces or in different areas of the same indoor space.
In a second aspect, a method of controlling an air conditioning system is provided.
When the outdoor unit of one of the air conditioners fails, the switching assembly is controlled to connect the indoor unit of the air conditioner with the outdoor unit of the other air conditioner to form a refrigerant circulation loop.
Preferably, after the failed outdoor unit of the air conditioner recovers to be normal, the switching component is controlled to switch the indoor unit of the air conditioner to be connected with the outdoor unit which recovers to be normal.
Preferably, the air conditioning system includes a first air conditioner and a second air conditioner, when an outdoor unit of the first air conditioner is in fault, whether the second air conditioner is in an operating state is judged, if yes, the switching assembly is controlled to connect the indoor unit of the first air conditioner and the indoor unit of the second air conditioner in parallel, and if not, the switching assembly is controlled to replace the indoor unit of the second air conditioner with the indoor unit of the first air conditioner.
Preferably, the controlling the switching assembly to replace the indoor unit of the first air conditioner with the indoor unit of the second air conditioner further includes connecting the indoor unit of the second air conditioner with an outdoor unit of the first air conditioner.
Preferably, when the outdoor unit of one of the air conditioners has a fault, the air conditioner in the air conditioning system in the shutdown state is searched, the air conditioner in the shutdown state is turned on, and the switching assembly is controlled to connect the indoor unit of the faulty air conditioner with the outdoor unit of the air conditioner which is just turned on to form a refrigerant circulation loop.
In a third aspect, a method of controlling an air conditioning system is provided.
The control method of the air conditioning system is characterized in that when the outdoor unit of one of the air conditioners performs defrosting, the air conditioner in the off state in the air conditioning system is searched, the air conditioner in the off state is turned on, and the switching component is controlled to perform switching connection between the defrosted air conditioner and the outdoor unit and the indoor unit of the air conditioner which are just turned on.
Preferably, the indoor units of the plurality of air conditioners are respectively disposed in different indoor spaces or in different areas of the same indoor space.
The air conditioning system provided by the invention is provided with the switching assembly, when the outdoor unit of one air conditioner breaks down, the indoor unit of the broken-down air conditioner can be switched to be connected with the outdoor units of other air conditioners to form a refrigerant circulation loop, and the normal operation of the indoor unit is maintained by means of the outdoor units of other air conditioners, so that the normal operation of the indoor unit is not influenced in the maintenance stage of the outdoor unit, and the air conditioning requirement of a user is met.
According to the control method of the air conditioning system, when the outdoor unit of one air conditioner fails, the indoor unit of the failed air conditioner can be switched to be connected with the outdoor units of other air conditioners to form a refrigerant circulation loop, and the normal operation of the indoor unit is maintained by means of the outdoor units of other air conditioners, so that the normal operation of the indoor unit is not influenced in the maintenance stage of the outdoor unit, and the air conditioning requirement of a user is met.
According to the other control method of the air conditioning system, the switching assembly can be controlled to connect the air conditioner with the outdoor unit and the indoor unit of the other air conditioner in an exchange manner when one air conditioner enters the defrosting state, so that the indoor unit of the air conditioner in the defrosting state can be used for heating the indoor by the other outdoor unit, and the use comfort of a user is improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram illustrating an air conditioning system according to an embodiment of the present invention in a normal heating state;
fig. 2 is a schematic diagram illustrating an air conditioning system according to an embodiment of the present invention after a failure occurs in a first outdoor unit;
fig. 3 is a schematic diagram illustrating defrosting of the first outdoor unit of the air conditioning system according to the embodiment of the present invention.
In the figure, 11, a first outdoor unit; 111. a first outdoor heat exchanger; 112. a first compressor; 113. a third four-way valve; 114. a first electronic expansion valve; 12. a first indoor unit; 121. a first indoor heat exchanger; 21. a second outdoor unit; 211. a second outdoor heat exchanger; 212. a second compressor; 213. a fourth four-way valve; 214. a second electronic expansion valve; 22. a second indoor unit; 221. a second indoor heat exchanger; 3. a switching component; 31. a first four-way valve; 32. a second four-way valve.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, and components have not been described in detail so as not to obscure the present invention.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The invention provides an air conditioning system which comprises a plurality of air conditioners, wherein each air conditioner comprises an outdoor unit and an indoor unit, and under the normal condition, the outdoor unit and the indoor unit of each air conditioner are connected to form a refrigerant circulation loop. The air conditioning system also comprises a switching component, which is used for switching the indoor unit in any one of the air conditioners to be connected with the outdoor unit of the other air conditioner to form a refrigerant circulation loop, so that when the outdoor unit of one of the air conditioners breaks down, the indoor unit of the broken-down air conditioner can be switched to be connected with the outdoor units of the other air conditioners to form the refrigerant circulation loop, and the normal operation of the indoor units is maintained by using the outdoor units of the other air conditioners, so that the normal operation of the indoor units is not influenced in the maintenance stage of the outdoor units, and the air conditioning requirement of a user is met.
Further, when the failed outdoor unit recovers to be normal, the outdoor unit is switched to be connected with the outdoor unit which recovers to be normal through the switching assembly. That is, the switching assembly can switch the indoor unit of any one of the air conditioners between the connection with the outdoor unit of the air conditioner and the connection with the outdoor unit of the other air conditioner, thereby easily realizing automatic control.
The following description will be made specifically by taking a first air conditioner and a second air conditioner as an example, and the control method is similar when there are more than two air conditioners.
The indoor unit of the first air conditioner is switched to be connected with the indoor unit of the second air conditioner in parallel, for example, when the second air conditioner is in a running state, the indoor unit of the second air conditioner is switched to be connected with the indoor unit of the second air conditioner in parallel, and the normal running of the second air conditioner can not be influenced; another way is to replace the indoor unit of the second air conditioner with the indoor unit of the first air conditioner, for example, when the second air conditioner is not in an operating state at first, the other air conditioner is turned on, and the indoor unit of the first air conditioner is used to replace the indoor unit of the second air conditioner, so that the heat exchange efficiency can be ensured.
Further, there may be two ways to replace the indoor unit of the second air conditioner with the indoor unit of the first air conditioner, one way is to directly disconnect the indoor unit of the second air conditioner from the outdoor unit and connect the indoor unit of the first air conditioner with the outdoor unit of the second air conditioner to form a refrigerant circulation loop, and the other way is to connect the indoor units and the outdoor units of the first air conditioner and the second air conditioner alternately, that is, the indoor unit of the first air conditioner is connected with the outdoor unit of the second air conditioner and the outdoor unit of the second air conditioner is connected with the indoor unit of the first air conditioner. This method can also be used when defrosting the outdoor unit. For example, when the outdoor unit of the first air conditioner performs defrosting, the indoor units and the outdoor units of the first air conditioner and the second air conditioner are connected in an exchange manner, and the second air conditioner is turned on, so that the indoor unit of the first air conditioner can still maintain heating.
Further preferably, the indoor units of the plurality of air conditioners are respectively disposed in different indoor spaces, or in different areas in a very large indoor space, so that the switching unit has little influence on the indoor air conditioning after switching the position of the outdoor unit. For example, the indoor unit of the first air conditioner is arranged in a living room, the indoor unit of the second air conditioner is arranged in a bedroom, so that when a user is in the living room, the first air conditioner is started, when the outdoor unit of the first air conditioner needs defrosting, the indoor unit of the first air conditioner is connected with the outdoor unit of the second air conditioner, and the outdoor unit of the first air conditioner is connected with the indoor unit of the second air conditioner, the indoor unit of the air conditioner in the living room still keeps heating, and the indoor unit of the air conditioner in the bedroom cools, so that the temperature of the living room is not greatly influenced. Further, when the air conditioners are arranged in three or more rooms, if the outdoor unit of one of the air conditioners is defrosted, the indoor unit of the air conditioner is connected to the outdoor unit of the air conditioner in the room farthest therefrom, thereby further reducing the influence of defrosting on the temperature in the room.
The specific structure of the switching assembly is not limited, and the switching function can be realized, for example, the switching assembly can be realized by a plurality of switch valves and connecting pipelines.
Further, a control method of the air conditioning system is provided, when the outdoor unit of one of the air conditioners fails, the switching assembly is controlled to connect the indoor unit of the air conditioner with the outdoor unit of the other air conditioner to form a refrigerant circulation loop, and the normal operation of the indoor unit is maintained by using the outdoor units of the other air conditioners, so that the normal operation of the indoor unit is not influenced in the maintenance stage of the outdoor unit, and the air conditioning requirement of a user is met.
Furthermore, after the outdoor unit with the fault air conditioner recovers to be normal, the control switching assembly switches the indoor unit of the air conditioner to be connected with the outdoor unit with the fault air conditioner, and automatic control is achieved.
In a preferred embodiment, when an outdoor unit of one of the air conditioners has a fault, the air conditioner in the off state in the air conditioning system is searched, and if the air conditioner is in the off state, it indicates that the air conditioner is not needed to be used temporarily, that is, if an indoor space where an indoor unit of the air conditioner is located does not need to be subjected to temperature adjustment, the air conditioner in the off state is turned on, and the switching component is controlled to connect the indoor unit of the faulty air conditioner and the outdoor unit of the turned-on air conditioner to form a refrigerant circulation loop. If the air conditioner in the shutdown state cannot be found, the indoor unit of the failed air conditioner is switched to be connected with the indoor units of other air conditioners in parallel, so that the use of other air conditioners is not influenced.
The air conditioning system comprises a first air conditioner and a second air conditioner, when an outdoor unit of the first air conditioner is in fault, whether the second air conditioner is in an operating state is judged, if yes, the switching component is controlled to connect an indoor unit of the first air conditioner and an indoor unit of the second air conditioner in parallel, so that normal work of the indoor unit of the second air conditioner is not influenced, and if the second air conditioner is not in the operating state, the switching component is controlled to replace the indoor unit of the second air conditioner with the indoor unit of the first air conditioner.
Further, another control method of the air conditioning system is provided, when the outdoor unit of one of the air conditioners performs defrosting, the air conditioner in the off state in the air conditioning system is searched, and if the air conditioner is in the off state, the air conditioner is not needed to be used temporarily, that is, the indoor space where the indoor unit of the air conditioner is located does not need to be subjected to temperature regulation, the air conditioner in the off state is turned on, and the switching component is controlled to connect the defrosted air conditioner with the outdoor unit and the indoor unit of the air conditioner which are just turned on in an exchange manner, so that the indoor unit of the air conditioner in the defrosting state is heated by other outdoor units, and the use comfort of a user is improved.
Further preferably, the indoor units of the plurality of air conditioners are respectively disposed in different indoor spaces, or are respectively disposed in different areas in a very large indoor space, so as to ensure that the switching assembly reduces the influence on the indoor air conditioning after switching the position of the outdoor unit. For example, the indoor unit of the first air conditioner is arranged in a living room, the indoor unit of the second air conditioner is arranged in a bedroom, so that when a user is in the living room, the first air conditioner is started, when the outdoor unit of the first air conditioner needs defrosting, the indoor unit of the first air conditioner is connected with the outdoor unit of the second air conditioner, and the outdoor unit of the first air conditioner is connected with the indoor unit of the second air conditioner, the indoor unit of the air conditioner in the living room still keeps heating, and the indoor unit of the air conditioner in the bedroom cools, so that the temperature of the living room is not greatly influenced. Further, when the air conditioners are arranged in three or more rooms, if the outdoor unit of one of the air conditioners is defrosted, the indoor unit of the air conditioner is connected to the outdoor unit of the air conditioner in the room farthest therefrom, thereby further reducing the influence of defrosting on the temperature in the room.
In a specific embodiment, as shown in fig. 1 to 3, the air conditioning system includes a first air conditioner and a second air conditioner, the first air conditioner includes a first indoor unit 12 and a first outdoor unit 11, a first outdoor heat exchanger 111, a first compressor 112, a third four-way valve 113, and a first electronic expansion valve 114 are disposed in the first outdoor unit 11, and the first indoor unit 12 includes a first indoor heat exchanger 121. The second air conditioner includes a second indoor unit 22 and a second outdoor unit 21, a second outdoor heat exchanger 211, a second compressor 212, a fourth four-way valve 213, and a second electronic expansion valve 214 are disposed in the second outdoor unit 21, and the second indoor unit 22 includes a second indoor heat exchanger 221. The switching component is used for switching the air conditioning system between a first connection state and a second connection state. In a first connection state, that is, in a normal operation state of the air conditioning system, the first outdoor unit 11 and the first indoor unit 12 are connected to form a refrigerant circulation loop, and the second outdoor unit 21 and the second indoor unit 22 are connected to form a refrigerant circulation loop; in the second connection state, the first outdoor unit 11 is connected to the second indoor unit 22, and the second outdoor unit 21 is connected to the first indoor unit 12, so that when the first outdoor unit 11 fails or when the first outdoor unit 11 is defrosted, the normal operation of the first indoor unit 12 can be ensured by switching the air conditioning system to the second connection state.
Further, the switching component includes a first four-way valve 31 and a second four-way valve 32, the first outdoor unit 11, the first indoor unit 12, the second outdoor unit 21, and the second indoor unit 22 all have two refrigerant inlets and outlets, four interfaces of the first four-way valve 31 are respectively connected to one of the refrigerant inlets and outlets of the first outdoor unit 11, the first indoor unit 12, the second outdoor unit 21, and the second indoor unit 22, and four interfaces of the second four-way valve 32 are respectively connected to another refrigerant inlet and outlet of the first outdoor unit 11, the first indoor unit 12, the second outdoor unit 21, and the second indoor unit 22.
When the air conditioning system is in a normal operation state, for example, both are in a heating state, as shown in fig. 1, the first four-way valve 31 connects one of the refrigerant inlets and outlets of the first outdoor unit 11 with one of the refrigerant inlets and outlets of the first indoor unit 12, and connects one of the refrigerant inlets and outlets of the second outdoor unit 21 with one of the refrigerant inlets and outlets of the second indoor unit 22; the second four-way valve 32 connects the other refrigerant inlet/outlet of the first outdoor unit 11 to the other refrigerant inlet/outlet of the first indoor unit 12, and connects the other refrigerant inlet/outlet of the second outdoor unit 21 to the other refrigerant inlet/outlet of the second indoor unit 22. The third four-way valve 113 and the fourth four-way valve 213 are connected in a conventional connection manner.
Specifically, the first air conditioner is started, and the high-temperature and high-pressure refrigerant flows out of the first compressor 112, passes through the third four-way valve 113 and the first four-way valve 31, and then is heated by the first indoor heat exchanger 121; then the refrigerant flows to a first electronic expansion valve 114 through a second four-way valve 32 for throttling, exchanges heat in a first outdoor heat exchanger 111 after throttling, returns to a suction port of a first compressor 112 through a third four-way valve 113, and forms a complete heating cycle.
When the second air conditioner is started, the high-temperature and high-pressure refrigerant flows out of the second compressor 212, passes through the fourth four-way valve 213 and the second four-way valve 32, and then is heated by the second indoor heat exchanger 221; then, the refrigerant flows to the second electronic expansion valve 214 through the first four-way valve 31 for throttling, exchanges heat in the second outdoor heat exchanger 211 after throttling, and returns to the suction port of the second compressor 212 through the fourth four-way valve 213, thereby forming a complete heating cycle.
When the first outdoor unit 11 fails, as shown in fig. 2, the first four-way valve 31 and the second four-way valve 32 are reversed, the first four-way valve 31 connects one of the refrigerant inlets and outlets of the first outdoor unit 11 with one of the refrigerant inlets and outlets of the second indoor unit 22, and connects one of the refrigerant inlets and outlets of the second outdoor unit 21 with one of the refrigerant inlets and outlets of the first indoor unit 12; the second four-way valve 32 connects the other refrigerant inlet/outlet of the first outdoor unit 11 to the other refrigerant inlet/outlet of the second indoor unit 22, and connects the other refrigerant inlet/outlet of the second outdoor unit 21 to the other refrigerant inlet/outlet of the first indoor unit 12. The third four-way valve 113 and the fourth four-way valve 213 are connected in a conventional connection manner. Therefore, the first indoor unit 12 and the second outdoor unit 21 form a refrigerant circulation loop to ensure normal heating of the first indoor unit 12. Similarly when the second outdoor unit 21 malfunctions.
Specifically, when the first outdoor unit 11 fails to start and a user needs to continue heating, the second air conditioner starts to operate, the first four-way valve 31 and the second four-way valve 32 are both reversed, a high-temperature and high-pressure refrigerant flows out from the second compressor 212, passes through the fourth four-way valve 213 and the second four-way valve 32, then flows to the first indoor heat exchanger 121 to continue heating, then flows to the second electronic expansion valve 214 through the first four-way valve 31 to be throttled, exchanges heat in the second outdoor heat exchanger 211 after throttling, and returns to the suction port of the second compressor 212 through the fourth four-way valve 213, so that a complete heating cycle is formed.
When the first outdoor unit 11 performs defrosting, as shown in fig. 3, the third four-way valve 113 is switched, the first four-way valve 31 and the second four-way valve 32 are also switched, the first four-way valve 31 connects one of the refrigerant inlets and outlets of the first outdoor unit 11 with one of the refrigerant inlets and outlets of the second indoor unit 22, and connects one of the refrigerant inlets and outlets of the second outdoor unit 21 with one of the refrigerant inlets and outlets of the first indoor unit 12; the second four-way valve 32 connects the other refrigerant inlet/outlet of the first outdoor unit 11 to the other refrigerant inlet/outlet of the second indoor unit 22, and connects the other refrigerant inlet/outlet of the second outdoor unit 21 to the other refrigerant inlet/outlet of the first indoor unit 12. The third four-way valve 113 and the fourth four-way valve 213 are connected in a conventional connection manner. Therefore, the first indoor unit 12 and the second outdoor unit 21 form a refrigerant circulation circuit to ensure normal heating of the first indoor unit 12, and the second indoor unit 22 and the first outdoor unit 11 form a refrigerant circulation circuit to defrost the first outdoor unit 11. Similarly when the second outdoor unit 21 performs defrosting.
Specifically, when the first outdoor unit 11 performs defrosting, the second air conditioner is started to operate, the first four-way valve 31 and the second four-way valve 32 are both reversed, the high-temperature and high-pressure refrigerant flows out of the second compressor 212, passes through the fourth four-way valve 213 and the second four-way valve 32, then flows to the first indoor heat exchanger 121 to continue heating, then the refrigerant flows to the second electronic expansion valve 214 through the first four-way valve 31 for throttling, exchanges heat in the second outdoor heat exchanger 211 after throttling, returns to the suction port of the second compressor 212 through the fourth four-way valve 213 to form a complete heating cycle, and the high-temperature and high-pressure refrigerant discharged from the first compressor 112 flows to the first outdoor heat exchanger 111 through the third four-way valve 113 to be defrosted, then throttled by the first electronic expansion valve 114, flows toward the second indoor heat exchanger 221 through the second four-way valve 32, and finally returns to the first compressor 112 through the first four-way valve 31 and the third four-way valve 113.
The first four-way valve 31 and the second four-way valve 32 can be replaced by four three-way valves, and the above functions can be achieved.
Those skilled in the art will readily appreciate that the above-described preferred embodiments may be freely combined, superimposed, without conflict.
It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the invention.
Claims (11)
1. The air conditioning system is characterized by comprising a plurality of air conditioners, wherein each air conditioner comprises an outdoor unit and an indoor unit, and the air conditioning system further comprises a switching assembly for switching the indoor unit in any one of the air conditioners to be connected with the outdoor unit of the other air conditioner to form a refrigerant circulation loop;
wherein,
the switching assembly is used for switching the indoor unit of any one of the air conditioners between connection with the outdoor unit of the air conditioner and connection with the outdoor unit of the other air conditioner; or,
the switching assembly is used for connecting the outdoor unit and the indoor unit of any two air conditioners in an exchange manner; or,
the switching component is used for switching the indoor unit of any one of the air conditioners to be connected with the indoor unit of the other air conditioner in parallel or replace the indoor unit of the other air conditioner.
2. The air conditioning system of claim 1, wherein the air conditioning system comprises a first air conditioner comprising a first outdoor unit and a first indoor unit and a second air conditioner comprising a second outdoor unit and a second indoor unit, and wherein the switching assembly is configured to switch the air conditioning system between a first connection state and a second connection state;
the first connection state is that the first outdoor unit is connected with the first indoor unit, and the second outdoor unit is connected with the second indoor unit;
the second connection state is that the first outdoor unit is connected with the second indoor unit, and the second outdoor unit is connected with the first indoor unit.
3. The system of claim 2, wherein the switching assembly comprises a first four-way valve and a second four-way valve, the first outdoor unit, the first indoor unit, the second outdoor unit, and the second indoor unit each have two refrigerant inlets and outlets, four ports of the first four-way valve are respectively connected to one of the refrigerant inlets and outlets of the first outdoor unit, the first indoor unit, the second outdoor unit, and the second indoor unit, and four ports of the second four-way valve are respectively connected to the other of the refrigerant inlets and outlets of the first outdoor unit, the first indoor unit, the second outdoor unit, and the second indoor unit.
4. The air conditioning system according to any one of claims 1 to 3, wherein the indoor units of the plurality of air conditioners are respectively disposed in different indoor spaces or in different areas of the same indoor space.
5. The method as claimed in any one of claims 1 to 4, wherein when the outdoor unit of one of the air conditioners fails, the switching unit is controlled to connect the indoor unit of the air conditioner with the outdoor unit of the other air conditioner to form a refrigerant circulation circuit.
6. The control method of claim 5, wherein the switching unit is controlled to switch the indoor unit of the air conditioner to be connected to the outdoor unit recovered to normal when the outdoor unit of the air conditioner failed recovers to normal.
7. The control method according to claim 5, wherein the air conditioning system comprises a first air conditioner and a second air conditioner, when an outdoor unit of the first air conditioner is in failure, whether the second air conditioner is in an operating state is judged, if yes, the switching component is controlled to connect the indoor unit of the first air conditioner and the indoor unit of the second air conditioner in parallel, otherwise, the switching component is controlled to replace the indoor unit of the second air conditioner with the indoor unit of the first air conditioner.
8. The method of claim 7, wherein controlling the switching assembly to replace the indoor unit of the first air conditioner with the indoor unit of the second air conditioner further comprises connecting the indoor unit of the second air conditioner with an outdoor unit of the first air conditioner.
9. The control method according to claim 5 or 6, wherein when an outdoor unit of one of the air conditioners fails, the air conditioner in the off state in the air conditioning system is searched, the air conditioner in the off state is turned on, and the switching component is controlled to connect the indoor unit of the failed air conditioner with the outdoor unit of the air conditioner which is just turned on to form a refrigerant circulation loop.
10. A method for controlling an air conditioning system according to any one of claims 1 to 3, wherein when an outdoor unit of one of the air conditioners performs defrosting, the air conditioner in the air conditioning system which is in the off state is searched, the air conditioner in the off state is turned on, and the switching unit is controlled to alternately connect the defrosted air conditioner with the outdoor unit and the indoor unit of the air conditioner which are just turned on.
11. The control method according to claim 10, wherein the indoor units of the plurality of air conditioners are respectively disposed in different indoor spaces or in different areas of the same indoor space.
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| CN108679780B (en) * | 2018-04-11 | 2019-08-09 | 浙江国祥股份有限公司 | A kind of high-precision constant-temperature constant-moisture air-conditioning system and control method |
| CN112503722B (en) * | 2020-12-07 | 2021-12-31 | 珠海格力电器股份有限公司 | Linkage control method and system of equipment, computer equipment and storage medium |
| CN114754462A (en) * | 2022-04-18 | 2022-07-15 | 青岛海尔空调电子有限公司 | Air conditioner control method, system, device, medium and air conditioner |
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