CN109163469A - Air-conditioning system and its control method - Google Patents
Air-conditioning system and its control method Download PDFInfo
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- CN109163469A CN109163469A CN201811032194.8A CN201811032194A CN109163469A CN 109163469 A CN109163469 A CN 109163469A CN 201811032194 A CN201811032194 A CN 201811032194A CN 109163469 A CN109163469 A CN 109163469A
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- compressor
- heat exchanger
- valve port
- control device
- air
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003507 refrigerant Substances 0.000 claims abstract description 143
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims description 40
- 239000012530 fluid Substances 0.000 claims description 12
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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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
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
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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
- F25B2313/029—Control issues
- F25B2313/0292—Control issues related to reversing valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
A kind of air-conditioning system, comprising: the first refrigerant circulation circuit, including outdoor heat exchanger, gas-liquid separator, the first compressor and the indoor heat exchanger being arranged in series；And second refrigerant circulation circuit, including First Heat Exchanger, throttling set, the second heat exchanger and the second compressor being sequentially connected in series, wherein second heat exchanger is set to the periphery and/or bottom of the gas-liquid separator.The present invention also provides the control methods of the air-conditioning system.The air-conditioning system can quickly heat starting at low ambient temperatures.
Description
Technical field
The present invention relates to air-conditioning technical fields, more particularly to a kind of air-conditioning system and its control method.
Background technique
Air-conditioning system, especially multi-line system, when outdoor environment temperature is too low, refrigerant is liquid inside air-conditioning system
State, refrigerant flow difficulties, need the long period that refrigerant is made to enter circulation at this time, so that the heating starting of air-conditioning system is slower,
Influence user experience.
Summary of the invention
Based on this, it is necessary to start slow problem for air-conditioning system heating under low temperature environment, provide one kind in low temperature ring
The air-conditioning system and its control method that heating starting is fast under border, user experience is good.
A kind of air-conditioning system, comprising:
First refrigerant circulation circuit, including outdoor heat exchanger, gas-liquid separator, the first compressor and the interior being arranged in series
Heat exchanger；
Second refrigerant circulation circuit, including First Heat Exchanger, throttling set, the second heat exchanger and the second pressure being sequentially connected in series
Contracting machine, wherein second heat exchanger is set to the periphery and/or bottom of the gas-liquid separator.
The First Heat Exchanger is set to the periphery and/or bottom of first compressor in one of the embodiments,.
Second refrigerant circulation circuit further includes first control device in one of the embodiments, first control
Device processed respectively with the exhaust outlet M of second compressor, the air inlet N of second compressor, the First Heat Exchanger and
The second heat exchanger connection, the First Heat Exchanger are connect with second heat exchanger；
The air-conditioning system has refrigerant recovering mode and quickly heating start-up mode:
Under the refrigerant recovering mode, first refrigerant circulation circuit is out of service, the first control device control
The exhaust outlet M for making second compressor is connected to the First Heat Exchanger, and control the air inlet N of second compressor with
The second heat exchanger connection；
Under the quick heating start-up mode, first refrigerant circulation circuit brings into operation, the first control dress
It sets and controls the exhaust outlet M of second compressor and be connected to second heat exchanger, and control the air inlet of second compressor
Mouth N is connected to the First Heat Exchanger.
First refrigerant circulation circuit further includes being connected on the outdoor heat exchanger and institute in one of the embodiments,
The subcooler between indoor heat exchanger is stated, second refrigerant circulation circuit further includes second control device, second control
Device is connect with the exhaust outlet of the air inlet N of second compressor, the first control device and the subcooler respectively, institute
First control device is stated further to connect with the middle pressure chamber of first compressor；
Under the refrigerant recovering mode and the quick heating start-up mode, second control device control described the
The air inlet N of two compressors is connect with the first control device；
The air-conditioning system also has Gas-supplying enthalpy-increasing mode, under the Gas-supplying enthalpy-increasing mode, the second control device
The air inlet N for controlling second compressor is connected to the exhaust outlet of the subcooler, described in the first control device control
The exhaust outlet M of second compressor is connected to the middle pressure chamber of first compressor.
The first control device includes the first four-way valve, the valve of first four-way valve in one of the embodiments,
Mouth A is connect with the exhaust outlet M of second compressor, and valve port B is connect with second heat exchanger, valve port C and second pressure
The air inlet N connection of contracting machine, valve port D are connect with the First Heat Exchanger；
Under the refrigerant recovering mode, the valve port A is connect with the valve port D, and the valve port B and the valve port C connect
It connects；
Under the quick heating start-up mode, the valve port A is connect with the valve port B, the valve port C and the valve port
D connection.
The first control device further includes the first triple valve in one of the embodiments, first triple valve
Valve port G is connect with the exhaust outlet M of second compressor, and valve port E is connect with the valve port A, valve port F and first compressor
Middle pressure chamber connection；
Under the refrigerant recovering mode and the quick heating start-up mode, the valve port G is connect with the valve port E；
Under the Gas-supplying enthalpy-increasing mode, the valve port G is connect with the valve port F.
The second control device includes the second triple valve, the valve of second triple valve in one of the embodiments,
Mouth H is connect with the air inlet N of second compressor, and valve port I is connected to the exhaust outlet of the subcooler (150), valve port J and institute
State first control device connection；
Under the refrigerant recovering mode and the quick heating start-up mode, the valve port H is connect with the valve port J；
Under the Gas-supplying enthalpy-increasing mode, the valve port H is connect with the valve port I.
Second refrigerant circulation circuit in one of the embodiments, further include:
The fluid reservoir being set between the first control device and the second control device；
The first switch device being set between the first control device and the fluid reservoir；And
The second switch device being set between the second control device and the fluid reservoir.
A kind of control method of the air-conditioning system, comprising: when first refrigerant circulation circuit is out of service, if inspection
Outdoor environment temperature is measured lower than the first preset temperature, then the first control device is made to control the exhaust of second compressor
Mouth M is connected to the First Heat Exchanger, and the air inlet N for controlling second compressor is connected to second heat exchanger, from
And run the air-conditioning system under the refrigerant recovering mode.
In one of the embodiments, when needing to heat, start first refrigerant circulation circuit, while making described the
The exhaust outlet M that one control device controls second compressor is connected to second heat exchanger, and controls second compression
The air inlet N of machine is connected to the First Heat Exchanger, so that the air-conditioning system be made to enter the quick heating start-up mode fortune
Row.
In one of the embodiments, after first refrigerant circulation circuit runs smoothly, make the second control dress
It sets and controls the air inlet N of second compressor and be connected to the exhaust outlet of the subcooler, control the first control device
The exhaust outlet M of second compressor is connected to the middle pressure chamber of first compressor, so that the air-conditioning system be made to enter institute
State Gas-supplying enthalpy-increasing mode operation.
In one of the embodiments, in the air inlet for making the second control device control second compressor
N is connected to the exhaust outlet of the subcooler, make the first control device control the exhaust outlet M of second compressor with it is described
It further comprise that: S1 closes the second switch device before the step of middle pressure chamber connection of first compressor；And delay
Preset time closes the first switch device (271).
The present invention increases one except main heating/refrigerating circuit (i.e. the first refrigerant circulation circuit) of air-conditioning system
A second refrigerant circulation circuit, second refrigerant circulation circuit can exchange heat with gas-liquid separator.When outdoor environment temperature
Spend it is lower, and first refrigerant circulation circuit carry out heating starting when, the refrigerant in second refrigerant circulation circuit can be made
The heat release at the gas-liquid separator, so that liquid refrigerants Quick-gasifying and entrance described first inside the gas-liquid separator
It is recycled in refrigerant circulation circuit, so as to so that the air-conditioning system quickly heats.
In addition, by periphery and/or bottom that the First Heat Exchanger is set to first compressor, when outdoor ring
Border temperature is lower, when outdoor unit is in low temperature environment, may make the refrigerant in second refrigerant circulation circuit described first
Heat release, the heat absorption at the gas-liquid separator at compressor, so that the liquid refrigerants accumulated in first compressor is complete
Portion is transferred in the gas-liquid separator, when first refrigerant circulation circuit starting, can effectively avoid first compression
Liquid hit phenomenon in machine improves the reliability of first compressor.
The second compressor in second refrigerant circulation circuit can also be accessed institute by air-conditioning system provided by the invention
It states in the first refrigerant circulation circuit, two-stage compression is formed with the first compressor in first refrigerant circulation circuit, thus right
First refrigerant circulation circuit carries out Gas-supplying enthalpy-increasing, improves the heating capacity of first refrigerant circulation circuit.
Detailed description of the invention
Fig. 1 is schematic diagram of the air-conditioning system provided by the invention under refrigerant recovering mode；
Fig. 2 is schematic diagram of the air-conditioning system provided by the invention under quickly heating start-up mode；
Fig. 3 is schematic diagram of the air-conditioning system provided by the invention under Gas-supplying enthalpy-increasing mode.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
Fig. 1 to Fig. 2 is please referred to, the present invention provides a kind of air-conditioning system, including the first refrigerant circulation circuit and the second refrigerant
Circulation loop.First refrigerant circulation circuit includes the outdoor heat exchanger 110 being arranged in series, the pressure of gas-liquid separator 120, first
Contracting machine 130 and indoor heat exchanger 140.First refrigerant circulation circuit is main heating/refrigerating circuit of the air-conditioning system.Institute
Stating outdoor heat exchanger 110, the gas-liquid separator 120, first compressor 130 and the indoor heat exchanger 140 can go here and there
Connection forms heating circuit.In alternate embodiments, the outdoor heat exchanger 110, the gas-liquid separator 120, described first
Compressor 130 and the indoor heat exchanger 140 also can connect to form refrigerating circuit.
In one embodiment, first refrigerant circulation circuit further comprises the second four-way valve 160.Second four-way
The valve port T of valve 160 is connect with the exhaust outlet S of first compressor 130.The valve port O of second four-way valve 160 and the room
The first end of interior heat exchanger 140 connects.The first end of the valve port P of second four-way valve 160 and the gas-liquid separator 120 connects
It connects.The valve port Q of second four-way valve 160 is connect with the first end of the outdoor heat exchanger 110.The indoor heat exchanger 140
Second end connect with the second end of the outdoor heat exchanger 110.The second end of the gas-liquid separator 120 and the compressor
Air inlet S connection.When the valve port T is connect with the valve port O, and the valve port P is connect with the valve port Q, edge is formed
First compressor 130 that refrigerant flow direction is sequentially connected in series, the indoor heat exchanger 140,110 and of the outdoor heat exchanger
The heating circulation loop of the gas-liquid separator 120.When the valve port T is connect with the valve port Q, and the valve port O and described
When valve port P connection, formed first compressor 130 being sequentially connected in series along refrigerant flow direction, the outdoor heat exchanger 110,
The refrigeration cycle of the indoor heat exchanger 140 and the gas-liquid separator 120.
The specific set-up mode of first refrigerant circulation circuit is not limited to the above embodiments, as long as enabling to the sky
Adjusting system heat/freeze by first refrigerant circulation circuit, such as in the outdoor heat exchanger 110 and described
Subcooler 150 can be further set between indoor heat exchanger 140, the exhaust outlet of first compressor 130 can further with oil
Separator 131 connects, and the refrigeration oil in the oil eliminator 131 further can return to a compressor by oil return line
In 130, throttling set (such as electric expansion valve) etc. can be further provided in first refrigerant circulation circuit.
Second refrigerant circulation circuit and first refrigerant circulation circuit can be independently of each other two be recycled back to
Road.Second refrigerant circulation circuit may include the First Heat Exchanger 210, throttling set 280, the second heat exchanger being sequentially connected in series
220 and second compressor 230.The First Heat Exchanger 210 may be disposed at the periphery and/or bottom of first compressor 130.
Second heat exchanger 220 may be disposed at the periphery and/or bottom of the gas-liquid separator 120.
In one embodiment, second compressor 230, second heat exchanger 220, the throttling set 280 and institute
Stating First Heat Exchanger 210 further can be sequentially connected in series connection along refrigerant flow direction.When second compressor 230, described
Two heat exchangers 220, the throttling set 280 and the First Heat Exchanger 210 are sequentially connected in series along refrigerant flow direction when being connected to, institute
The refrigerant stated in the second refrigerant circulation circuit passes through second heat exchanger 220 heat release at the gas-liquid separator 120.This can
To start for the heating of the air-conditioning system, i.e., the heating starting of described first refrigerant circulation circuit, so that the gas-liquid point
From the refrigerant Quick-gasifying lodged in liquid form in the gas-liquid separator 120 in device 120 and enter first refrigerant
In circulation loop, heat the air-conditioning system quickly, at this point, the air-conditioning system is in quickly heating start-up mode.
In one embodiment, the First Heat Exchanger 210 may be disposed at the periphery and/or bottom of first compressor 130
Portion.Second compressor 230, the First Heat Exchanger 210, the throttling set 280 and second heat exchanger 220 can edges
Refrigerant flow direction is sequentially connected in series connection.When first refrigerant circulation circuit (such as second four-way valve 160 out of service
Four valve ports disconnect) when, make second compressor 230, the First Heat Exchanger 210, the throttling set 280 and institute
It states the second heat exchanger 220 and is sequentially connected in series connection along refrigerant flow direction, then the refrigerant in second refrigerant circulation circuit passes through
The First Heat Exchanger 210 heat release at first compressor 130, by second heat exchanger 220 in the gas-liquid point
It absorbs heat from device 120, so that 130 internal temperature of the first compressor is higher than environment temperature, inside the gas-liquid separator 120
Temperature is lower than environment temperature, so that the liquid refrigerants accumulated inside first compressor 130 be made to be transferred to the gas-liquid separation
In device 120, at this point, the air-conditioning system is in refrigerant recovering mode.When outdoor environment temperature is lower, by making the air-conditioning
System runs refrigerant recovering mode, and it is described to may make that the liquid refrigerants accumulated inside first compressor 130 is fully transferred to
In gas-liquid separator 120, so that there is liquid in the first compressor 130 described in when first refrigerant circulation circuit being avoided to bring into operation
The phenomenon that hitting improves 130 reliability of operation of the first compressor.
In one embodiment, the air-conditioning system can the refrigerant recovering mode and the quick heating start-up mode it
Between switch over.Second refrigerant circulation circuit can further comprise first control device 240.The first control device
240 can exchange heat with the exhaust outlet M of second compressor 230, the air inlet N of second compressor 230, described first respectively
Device 210 and second heat exchanger 220 connection.Referring to Fig. 1, under the refrigerant recovering mode, the first control device
The exhaust outlet M of 240 control second compressors 230 is connected to the First Heat Exchanger 210, and controls second compressor
230 air inlet N is connected to second heat exchanger 220, so that second compressor 230 and second heat exchanger
220 are sequentially connected in series along refrigerant flow direction with the First Heat Exchanger 210 and are connected to.Referring to Fig. 2, starting in the quick heating
Under mode, the first control device 240 controls the exhaust outlet M of second compressor 230 and second heat exchanger 220 connects
It is logical, and the air inlet N for controlling second compressor 230 is connected to the First Heat Exchanger 210, so that second pressure
Contracting machine 230, the First Heat Exchanger 210 are sequentially connected in series along refrigerant flow direction with second heat exchanger 220 and are connected to.
In one embodiment, the first control device 240 may include the first four-way valve 241.First four-way valve 241
Valve port A can be connect with the exhaust outlet M of second compressor 230.The valve port B of first four-way valve 241 can be with described
The connection of two heat exchangers 220.The valve port C of first four-way valve can be connect with the air inlet N of second compressor 230.It is described
The valve port D of first four-way valve can be connect with the First Heat Exchanger 210.Under the refrigerant recovering mode, the valve port A can be with
The valve port D connection, so that the exhaust outlet M of second compressor 230 be made to be connected to the First Heat Exchanger 210；The valve
Mouth C can be connected to the valve port B, so that the air inlet N of second compressor 230 be made to connect with second heat exchanger 220.
Under the quick heating start-up mode, the valve port A can be connect with the valve port B, to make second compressor 230
Exhaust outlet M is connected to second heat exchanger 220；The valve port C can be connect with the valve port D, to make second compression
The air inlet N of machine 230 is connected to the First Heat Exchanger 210.
In one embodiment, the air-conditioning system can also have Gas-supplying enthalpy-increasing mode.Specifically, the first control device
240 can further connect with the middle pressure chamber of first compressor 130.Second refrigerant circulation circuit may also include the second control
Device processed.The second control device can respectively with the air inlet N of second compressor 230, the first control device 240
It is connected with the exhaust outlet of the subcooler 150.Under the refrigerant recovering mode and the quick heating start-up mode, described
Two control devices can control the air inlet N of second compressor 230 to connect with the first control device 240.Please refer to figure
3, under the Gas-supplying enthalpy-increasing mode, the second control device can control the air inlet N of second compressor 230 with it is described
The exhaust outlet of subcooler 150 is connected to, and the first control device 240 can control exhaust outlet M and the institute of second compressor 230
State the middle pressure chamber connection of the first compressor.At this point, second compressor 230 is accessed in first refrigerant circulation circuit,
The gas coolant being discharged in the subcooler 150 can enter second compressor 230 and carry out first compression, subsequently into described
Second-compressed is carried out in first compressor 130, so that the refrigerant in first refrigerant circulation circuit is by second-compressed, it can
It is obviously improved the low-temperature heating ability of the air-conditioning system.The Gas-supplying enthalpy-increasing mode can be transported in first refrigerant circulation circuit
Enter after row is steady, such as can be after first refrigerant circulation circuit runs smoothly, by the quick heating start-up mode
It is directly switch to the Gas-supplying enthalpy-increasing mode.
In one embodiment, the first control device 240 can further comprise the first triple valve 242.Described 1st
The valve port G of port valve 242 can be connect with the exhaust outlet M of second compressor 230.The valve port E of first triple valve 242 can be with
The valve port A connection of first four-way valve 241.The valve port F of first triple valve 242 can be with first compressor 130
Middle pressure chamber connection.Under the refrigerant recovering mode and the quick heating start-up mode, the valve port G can be with the valve port E
Connection, so that the exhaust outlet M of second compressor 230 is connected to the valve port A of first four-way valve 241.Described
Under Gas-supplying enthalpy-increasing mode, the valve port G can be connect with the valve port F, so that the exhaust outlet of second compressor 230
M is connected to the middle pressure chamber of first compressor 130.
In one embodiment, the second control device may include the second triple valve 250.Second triple valve 250
Valve port H can be connect with the air inlet N of second compressor 230.The valve port I of second triple valve 250 can be with the supercooling
The exhaust outlet of device 150 connects.The valve port G of second triple valve 250 can be with the first control device 240, such as described
The valve port C connection of one four-way valve.Under the refrigerant recovering mode and the quick heating start-up mode, the valve port H and institute
Valve port C connection is stated, so that the air inlet N of second compressor 230 be made to connect with the first control device 240.Described
Under Gas-supplying enthalpy-increasing mode, the valve port H is connect with the valve port I so that the air inlet N of second compressor 230 with
The exhaust outlet of the subcooler 150 is connected to.
In one embodiment, second refrigerant circulation circuit can further comprise being set to the first control device
Fluid reservoir 260 between 240 and the second control device.It can between the fluid reservoir 260 and the first control device 240
To be provided with first switch device 271.Second switch can be set between the fluid reservoir 260 and the second control device
Device 272.It, can be first by institute when the air-conditioning system is converted from the quick heating start-up mode to the Gas-supplying enthalpy-increasing mode
The closing of second switch device 272 is stated, after the refrigerant in second refrigerant circulation circuit fully enters the fluid reservoir 260,
First switch device 271 is closed again, it finally will under the switching of the first control device 240 and the second control device
Second compressor 230 accesses in first refrigerant circulation circuit.Doing so can make first refrigerant circulation return
The refrigerant in refrigerant and second refrigerant circulation circuit in road separately, can be recycled independently.Institute
Stating fluid reservoir 260 may be disposed between the valve port C of first four-way valve 241 and the valve port G of second triple valve 250.
The first switch device 271 and/or the second switch device 272 can be solenoid valve.
In one embodiment, the First Heat Exchanger 210 and second heat exchanger 220 can be heat exchange coil.It is described
Throttling set 280 can be electric expansion valve.
The present invention also provides a kind of control methods of air-conditioning system, comprising: when the air-conditioning system is standby, that is, works as
When first refrigerant circulation circuit is out of service while disconnecting (such as four valve ports of second four-way valve 160), if inspection
Outdoor environment temperature is measured lower than the first preset temperature, then the first control device 240 is made to control second compressor 230
Exhaust outlet M be connected to the First Heat Exchanger 210, and control the air inlet N of second compressor 230 and described second and change
Hot device 220 is connected to, so that the air-conditioning system be made to run under the refrigerant recovering mode.First preset temperature can root
It is arranged according to actual demand, such as may be configured as subzero 20 degrees Celsius.The air-conditioning system can transport under the refrigerant recovering mode
Row preset time t 1.The preset time t 1 can be to make cold in first compressor 130 under the refrigerant recovering mode
Matchmaker all migrated to the time of the gas-liquid separator 120.
Further, when needing to heat, first refrigerant circulation circuit can be started, while making the first control dress
The exhaust outlet M for setting 240 controls, second compressor 230 is connected to second heat exchanger 220, and controls second compression
The air inlet N of machine 230 is connected to the First Heat Exchanger 210, so that the air-conditioning system be made to enter the quick heating starting
Mode operation.
Further, after the running smoothly of first refrigerant circulation circuit, second control device control institute can be made
The air inlet N for stating the second compressor 230 is connected to the exhaust outlet of the subcooler 150, makes first control device control institute
The exhaust outlet M for stating the second compressor 230 is connected to the middle pressure chamber of first compressor 130, thus make the air-conditioning system into
Enter the Gas-supplying enthalpy-increasing mode operation.
Further, make the second control device control second compressor 230 air inlet N and the supercooling
The exhaust outlet of device 150 is connected to, and the first control device is made to control the exhaust outlet M and described first of second compressor 230
Before the middle pressure chamber connection of compressor 130, i.e., when the described quick heating start-up mode is converted to the Gas-supplying enthalpy-increasing mode, may be used also
The following steps are included: S1, closes the second switch device 272；And S2, delay preset time t 2 close the first switch
Device 271.The preset time t 2, which can be, makes the refrigerant in second refrigerant circulation circuit fully enter the fluid reservoir
Time in 260.Do so can guarantee by second compressor access first refrigerant circulation circuit when, described second
The refrigerant in refrigerant and first refrigerant circulation circuit in refrigerant circulation circuit is not interfere with each other.
The present invention increases one except main heating/refrigerating circuit (i.e. the first refrigerant circulation circuit) of air-conditioning system
A second refrigerant circulation circuit, second refrigerant circulation circuit can be compressed with first in first refrigerant circulation circuit
Machine and gas-liquid separator are exchanged heat respectively.When outdoor environment temperature is lower, and outdoor unit is in low temperature environment, may make described
Refrigerant heat release, the heat absorption at the gas-liquid separator at first compressor in second refrigerant circulation circuit, to make
It obtains the liquid refrigerants accumulated in first compressor to be fully transferred in the gas-liquid separator, when first refrigerant circulation
When loop start, the liquid hit phenomenon in first compressor can effectively avoid, improve the reliability of first compressor.
In addition, when outdoor environment temperature is lower, and first refrigerant circulation circuit heat when starting, and can make second refrigerant
Refrigerant heat release at the gas-liquid separator in circulation loop, so that the liquid refrigerants quick air inside the gas-liquid separator
Change and enter in first refrigerant circulation circuit and recycle, so as to so that the air-conditioning system quickly heats.
The second compressor in second refrigerant circulation circuit can also be accessed institute by air-conditioning system provided by the invention
It states in the first refrigerant circulation circuit, two-stage compression is formed with the first compressor in first refrigerant circulation circuit, thus right
First refrigerant circulation circuit carries out Gas-supplying enthalpy-increasing, improves the heating capacity of first refrigerant circulation circuit.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (12)
1. a kind of air-conditioning system characterized by comprising
First refrigerant circulation circuit, including outdoor heat exchanger (110), the gas-liquid separator (120), the first compressor being arranged in series
(130) and indoor heat exchanger (140)；And
Second refrigerant circulation circuit, including First Heat Exchanger (210), the throttling set (280), the second heat exchanger being sequentially connected in series
(220) and the second compressor (230), wherein second heat exchanger (220) is set to the week of the gas-liquid separator (120)
Side and/or bottom.
2. air-conditioning system according to claim 1, which is characterized in that the First Heat Exchanger (210) is set to described
The periphery and/or bottom of one compressor (130).
3. air-conditioning system according to claim 2, which is characterized in that second refrigerant circulation circuit further includes the first control
Device (240) processed, the first control device (240) respectively with the exhaust outlet M of second compressor (230), described second
Air inlet N, the First Heat Exchanger (210) and second heat exchanger (220) connection of compressor (230), described first changes
Hot device (210) connect with second heat exchanger (220)；
The air-conditioning system has refrigerant recovering mode and quickly heating start-up mode:
Under the refrigerant recovering mode, first refrigerant circulation circuit is out of service, first control device (240) control
The exhaust outlet M for making second compressor (230) is connected to the First Heat Exchanger (210), and controls second compressor
(230) air inlet N is connected to second heat exchanger (220)；
Under the quick heating start-up mode, first refrigerant circulation circuit brings into operation, the first control device
(240) the exhaust outlet M for controlling second compressor (230) is connected to second heat exchanger (220), and controls described second
The air inlet N of compressor (230) is connected to the First Heat Exchanger (210).
4. air-conditioning system according to claim 3, which is characterized in that first refrigerant circulation circuit further includes being connected on
Subcooler (150) between the outdoor heat exchanger (110) and the indoor heat exchanger (140), second refrigerant circulation return
Road further includes second control device, the second control device respectively with the air inlet N of second compressor (230), described
First control device (240) is connected with the exhaust outlet of the subcooler (150), the first control device (240) further with
The middle pressure chamber of first compressor (130) connects；
Under the refrigerant recovering mode and the quick heating start-up mode, second control device control second pressure
The air inlet N of contracting machine (230) is connect with the first control device (240)；
The air-conditioning system also has Gas-supplying enthalpy-increasing mode, under the Gas-supplying enthalpy-increasing mode, the second control device control
The air inlet N of second compressor (230) is connected to the exhaust outlet of the subcooler (150), the first control device
(240) the exhaust outlet M for controlling second compressor (230) is connected to the middle pressure chamber of first compressor (130).
5. air-conditioning system according to claim 4, which is characterized in that the first control device (240) includes the one or four
Port valve (241), the valve port A of first four-way valve (241) are connect with the exhaust outlet M of second compressor (230), valve port B
Connect with second heat exchanger (220), valve port C is connect with the air inlet N of second compressor (230), valve port D with it is described
First Heat Exchanger (210) connection；
Under the refrigerant recovering mode, the valve port A is connect with the valve port D, and the valve port B is connect with the valve port C；
Under the quick heating start-up mode, the valve port A is connect with the valve port B, and the valve port C and the valve port D connect
It connects.
6. air-conditioning system according to claim 5, which is characterized in that the first control device (240) further includes first
Triple valve (242), the valve port G of first triple valve (242) are connect with the exhaust outlet M of second compressor (230), valve port
E is connect with the valve port A, and valve port F is connect with the middle pressure chamber of first compressor (130)；
Under the refrigerant recovering mode and the quick heating start-up mode, the valve port G is connect with the valve port E；
Under the Gas-supplying enthalpy-increasing mode, the valve port G is connect with the valve port F.
7. air-conditioning system according to claim 4, which is characterized in that the second control device includes the second triple valve
(250), the valve port H of second triple valve (250) is connect with the air inlet N of second compressor (230), valve port I and institute
The exhaust outlet connection of subcooler (150) is stated, valve port J is connect with the first control device (240)；
Under the refrigerant recovering mode and the quick heating start-up mode, the valve port H is connect with the valve port J；
Under the Gas-supplying enthalpy-increasing mode, the valve port H is connect with the valve port I.
8. air-conditioning system according to claim 4, which is characterized in that second refrigerant circulation circuit further include:
The fluid reservoir (260) being set between the first control device (240) and the second control device；
The first switch device (271) being set between the first control device (240) and the fluid reservoir (260)；And
The second switch device (272) being set between the second control device and the fluid reservoir (260).
9. a kind of control method of air-conditioning system, which is characterized in that the described in any item air-conditioning systems of claim 3~8 are used for,
Include:
When first refrigerant circulation circuit is out of service, if detecting, outdoor environment temperature is lower than the first preset temperature,
The first control device (240) are made to control exhaust outlet M and the First Heat Exchanger (210) of second compressor (230)
Connection, and the air inlet N for controlling second compressor (230) is connected to second heat exchanger (220), to make the sky
Adjusting system is run under the refrigerant recovering mode.
10. the control method of air-conditioning system according to claim 9, which is characterized in that when needing to heat, described in starting
First refrigerant circulation circuit, while making the exhaust outlet M of the first control device (230) control second compressor (230)
It is connected to second heat exchanger (220), and controls the air inlet N and the First Heat Exchanger of second compressor (230)
(210) it is connected to, so that the air-conditioning system be made to enter the quick heating start-up mode operation.
11. the control method of air-conditioning system according to claim 10, which is characterized in that when first refrigerant circulation returns
After road is run smoothly, the second control device is made to control the air inlet N and the subcooler of second compressor (230)
(150) exhaust outlet connection, makes the first control device (240) to control exhaust outlet M and the institute of second compressor (230)
The middle pressure chamber connection for stating the first compressor (130), so that the air-conditioning system be made to enter the Gas-supplying enthalpy-increasing mode operation.
12. the control method of air-conditioning system according to claim 11, which is characterized in that make second control described
The air inlet N that device controls second compressor (230) is connected to the exhaust outlet of the subcooler (150), makes described first
Control device (240) controls the exhaust outlet M of second compressor (230) and the middle pressure chamber of first compressor (130) connects
Before logical step, further comprise:
S1 closes the second switch device (272)；And
S2, delay preset time close the first switch device (271).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032194.8A CN109163469B (en) | 2018-09-05 | 2018-09-05 | Air conditioning system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811032194.8A CN109163469B (en) | 2018-09-05 | 2018-09-05 | Air conditioning system and control method thereof |
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| CN109163469B CN109163469B (en) | 2024-02-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990500A (en) * | 2019-03-04 | 2019-07-09 | 南京天加环境科技有限公司 | A kind of combustion-gas thermal pump air-conditioning system that preventing back liquid and its control method |
| WO2020164212A1 (en) * | 2019-02-12 | 2020-08-20 | 珠海格力电器股份有限公司 | Refrigerant circulation system and control method thereof, and air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010133606A (en) * | 2008-12-03 | 2010-06-17 | Denso Corp | Ejector type refrigerating cycle |
| CN103175344A (en) * | 2013-03-13 | 2013-06-26 | 青岛海信日立空调系统有限公司 | Cold-region used multi-connected heat pump system and control method thereof |
| CN106801955A (en) * | 2017-01-17 | 2017-06-06 | 青岛海信日立空调系统有限公司 | A kind of air-to-water heat pump system and control method |
| CN208765303U (en) * | 2018-09-05 | 2019-04-19 | 珠海格力电器股份有限公司 | Air-conditioning system |
-
2018
- 2018-09-05 CN CN201811032194.8A patent/CN109163469B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010133606A (en) * | 2008-12-03 | 2010-06-17 | Denso Corp | Ejector type refrigerating cycle |
| CN103175344A (en) * | 2013-03-13 | 2013-06-26 | 青岛海信日立空调系统有限公司 | Cold-region used multi-connected heat pump system and control method thereof |
| CN106801955A (en) * | 2017-01-17 | 2017-06-06 | 青岛海信日立空调系统有限公司 | A kind of air-to-water heat pump system and control method |
| CN208765303U (en) * | 2018-09-05 | 2019-04-19 | 珠海格力电器股份有限公司 | Air-conditioning system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020164212A1 (en) * | 2019-02-12 | 2020-08-20 | 珠海格力电器股份有限公司 | Refrigerant circulation system and control method thereof, and air conditioner |
| CN109990500A (en) * | 2019-03-04 | 2019-07-09 | 南京天加环境科技有限公司 | A kind of combustion-gas thermal pump air-conditioning system that preventing back liquid and its control method |
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| Publication number | Publication date |
|---|---|
| CN109163469B (en) | 2024-02-27 |
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