CN108088008B - Multi-split air conditioner and heat recovery system thereof - Google Patents
Multi-split air conditioner and heat recovery system thereof Download PDFInfo
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- CN108088008B CN108088008B CN201711318651.5A CN201711318651A CN108088008B CN 108088008 B CN108088008 B CN 108088008B CN 201711318651 A CN201711318651 A CN 201711318651A CN 108088008 B CN108088008 B CN 108088008B
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- 238000011084 recovery Methods 0.000 title claims abstract description 86
- 239000003507 refrigerant Substances 0.000 claims abstract description 49
- 238000005338 heat storage Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims description 63
- 238000009825 accumulation Methods 0.000 claims description 52
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000005057 refrigeration Methods 0.000 claims description 23
- 238000004378 air conditioning Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000002699 waste material Substances 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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- 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
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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
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention provides a multi-split heat recovery system which comprises a compressor assembly, an outdoor heat exchanger, a throttling device, an indoor unit and a reversing valve, wherein the compressor assembly is connected with the outdoor heat exchanger; one end of the reversing valve, which is connected with the compressor unit, is connected with the reversing valve, and the other end of the reversing valve is connected with the throttling device; one end of the indoor unit is connected with the reversing valve, and the other end of the indoor unit is connected with the throttling device; throttle device and indoor the machine is also provided with a cold storage device for accumulating or releasing cold of the refrigerant; and/or a heat storage device for accumulating or releasing the heat of the refrigerant is arranged between the indoor unit and the reversing valve; by adopting the technical scheme, the heat recovery multi-split system can work in the optimal load area for a long time in each operation mode, and the energy utilization rate and the efficiency of the multi-split system are improved.
Description
Technical Field
The invention belongs to the technical field of air conditioner refrigeration, and particularly relates to a multi-split heat recovery system and an air conditioning device.
Background
The existing multi-split air conditioner heat recovery system has the functions of a single-cooling and heat pump type system, and simultaneously can greatly improve the energy utilization efficiency because both condensing load and evaporating load can be utilized; all indoor units of the heat recovery system can be used for refrigerating and heating independently, namely, the refrigerating and the heating of the indoor units in the same set of system can exist at the same time; however, even if the heat recovery multi-split air conditioner system is operated under certain conditions with higher load, the energy-saving effect of the multi-split variable frequency air conditioner system under partial load is obvious, and the energy efficiency is relatively high; the existing heat recovery multi-split air conditioner is free to run, the system can not be controlled to run in an optimal load area, and the problem of energy waste exists.
Based on the technical problems of the multi-split air conditioner, no related solution exists; there is therefore an urgent need to seek an effective solution to the above problems.
Disclosure of Invention
The invention aims to solve the problems that the prior multi-split air conditioner is free to run and cannot control the system to run in an optimal load area.
The invention provides a multi-split heat recovery system which comprises a compressor assembly, an outdoor heat exchanger, a throttling device, an indoor unit and a reversing valve, wherein the compressor assembly is connected with the outdoor heat exchanger; one end of the reversing valve, which is connected with the compressor unit, is connected with the reversing valve, and the other end of the reversing valve is connected with the throttling device; one end of the indoor unit is connected with the reversing valve, and the other end of the indoor unit is connected with the throttling device; a cold accumulation device for accumulating or releasing cold of the refrigerant is also arranged between the throttling device and the indoor unit; and/or a heat storage device for storing or releasing the heat of the refrigerant is arranged between the indoor unit and the reversing valve.
Further, the compressor assembly comprises a compressor and an oil-gas separator, and the oil-gas separator is connected with an exhaust port of the compressor; the reversing valve comprises a first reversing valve and a second reversing valve; one end of the outdoor heat exchanger is connected with the first reversing valve, and the other end of the outdoor heat exchanger is connected with the throttling device; one end of the second reversing valve is connected with the oil-gas separator, and the other end of the second reversing valve is connected with the indoor unit; a heat storage device is arranged between the second reversing valve and the indoor unit.
Further, the throttling device comprises a first electronic expansion valve; the compressor component comprises a compressor and a gas-liquid separator, and the gas-liquid separator is connected with an air suction port of the compressor; the cold accumulation device is connected with a flow path between the outdoor heat exchanger and the first electronic expansion valve in parallel; the cold accumulation loop is also provided with a second electronic expansion valve, and the second electronic expansion valve is arranged between the cold accumulation device and the first electronic expansion valve; the cold accumulation device is connected with the gas-liquid separator.
Further, the heat storage device is arranged in parallel with the flow path between the second reversing valve and the indoor unit through the heat storage loop, and the heat storage device is connected with the throttling device.
Further, the compressor assembly also comprises a gas-liquid separator, and the gas-liquid separator is connected with the air suction port of the compressor; the indoor unit comprises a first indoor unit and a second indoor unit; one end of the first indoor unit is respectively connected with the second reversing valve and the gas-liquid separator, and the other end of the first indoor unit is respectively connected with the second indoor unit and the throttling device; one end of the second indoor unit is connected with the throttling device and the first indoor unit respectively, and the other end of the second indoor unit is connected with the gas-liquid separator and the second reversing valve respectively.
Further, the device also comprises a one-way valve, wherein the one-way valve and the throttling device are arranged in parallel; one end of the one-way valve is connected with the outdoor heat exchanger, and the other end of the one-way valve is connected with the cold accumulation device and/or the indoor unit; and the one-way valve is connected to the cold accumulation device and/or the indoor unit along the outdoor heat exchanger in a one-way.
Further, a first electromagnetic valve is arranged between the first electronic expansion valve and the indoor unit; an eighth electromagnetic valve is arranged between the indoor unit and the gas-liquid separator; a fifth electromagnetic valve is arranged between the cold accumulation device and the gas-liquid separator; a second electromagnetic valve is arranged between the second electronic expansion valve and the first electronic expansion valve; a fourth electromagnetic valve is arranged between the cold accumulation device and the indoor unit; a fifth electromagnetic valve is arranged between the cold accumulation device and the gas-liquid separator; the cold accumulation device also comprises a third electromagnetic valve, one end of the third electromagnetic valve is connected with the first electronic expansion valve, and the other end of the third electromagnetic valve is directly connected with the cold accumulation device.
Further, a first electromagnetic valve is arranged between the first electronic expansion valve and the indoor unit; a thirteenth electromagnetic valve is arranged between the second reversing valve and the indoor unit; a sixth electromagnetic valve is arranged between the first indoor unit and the second reversing valve; an eighth electromagnetic valve is arranged between the first indoor unit and the gas-liquid separator; a seventh electromagnetic valve is arranged between the second indoor unit and the second reversing valve; a ninth electromagnetic valve is arranged between the second indoor unit and the gas-liquid separator; a twelfth electromagnetic valve is arranged between the second reversing valve and the heat storage device; a tenth electromagnetic valve is arranged between the heat storage device and the indoor unit; an eleventh electromagnetic valve is arranged between the heat storage device and the throttling device.
Further, a thirteenth electromagnetic valve is arranged between the second reversing valve and the indoor unit; a first electromagnetic valve is arranged between the first electronic expansion valve and the indoor unit; a sixth electromagnetic valve is arranged between the first indoor unit and the second reversing valve; an eighth electromagnetic valve is arranged between the first indoor unit and the gas-liquid separator; a seventh electromagnetic valve is arranged between the second indoor unit and the second reversing valve; a ninth electromagnetic valve is arranged between the second indoor unit and the gas-liquid separator; a fifth electromagnetic valve is arranged between the cold accumulation device and the gas-liquid separator; a second electromagnetic valve is arranged between the second electronic expansion valve and the first electronic expansion valve; a fourth electromagnetic valve is arranged between the cold accumulation device and the indoor unit; a fifth electromagnetic valve is arranged between the cold accumulation device and the gas-liquid separator; the cold accumulation device also comprises a third electromagnetic valve, one end of the third electromagnetic valve is connected with the first electronic expansion valve, and the other end of the third electromagnetic valve is directly connected with the cold accumulation device.
Further, the reversing valve is a four-way valve; the outdoor heat exchanger is a condenser, and an evaporator is arranged in the indoor unit.
Further, the device also comprises a capillary; one end of the capillary tube is connected with the reversing valve, and the other end of the capillary tube is connected with the gas-liquid separator.
Further, the device also comprises a first capillary and a second capillary; one end of the first capillary tube is connected with the first reversing valve, and the other end of the first capillary tube is connected with the gas-liquid separator; one end of the second capillary tube is connected with the second reversing valve, and the other end of the second capillary tube is connected with the gas-liquid separator.
Further, the first reversing valve is provided with a first loop which is directly connected with the gas-liquid separator; the second reversing valve is provided with a second loop which is directly connected with the gas-liquid separator; the first loop is connected with the first capillary in parallel; the second circuit is connected in parallel with the second capillary.
Further, when the multi-split heat recovery system is in a low-load full refrigeration mode, the first electromagnetic valve is opened, and the second electromagnetic valve is opened, the third electromagnetic valve is closed, the fourth electromagnetic valve is closed, the fifth electromagnetic valve is opened and the eighth electromagnetic valve is opened; or alternatively, the first and second heat exchangers may be,
when the multi-split air conditioner heat recovery system is in a high-load complete refrigeration mode, the first electromagnetic valve is opened, the second electromagnetic valve is closed, the third electromagnetic valve is opened, the fourth electromagnetic valve is opened, the fifth electromagnetic valve is closed, and the eighth electromagnetic valve is opened.
Further, when the multi-split heat recovery system is in the low-load main body refrigeration mode, the first electromagnetic valve is opened, the second electromagnetic valve is opened, the fourth electromagnetic valve is closed, the fifth electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, and the thirteenth electromagnetic valve is opened; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in the high-load main body refrigeration mode, the first electromagnetic valve is opened, and the second electromagnetic valve is opened, the fourth electromagnetic valve is opened, the fifth electromagnetic valve is closed, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the eleventh electromagnetic valve is opened, and the thirteenth electromagnetic valve is opened.
When the multi-split air conditioner heat recovery system is in a low-load full heating mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is opened, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is closed, the tenth electromagnetic valve is closed, the eleventh electromagnetic valve is opened, the twelfth electromagnetic valve is opened, and the thirteenth electromagnetic valve is opened; the first reversing valve is communicated with the compressor; or alternatively, the first and second heat exchangers may be,
when the multi-split air conditioner heat recovery system is in a high-load full heating mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is opened, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is closed, the tenth electromagnetic valve is opened, the eleventh electromagnetic valve is closed, the twelfth electromagnetic valve is opened, and the thirteenth electromagnetic valve is opened; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in a low-load main heating mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, the tenth electromagnetic valve is closed, the eleventh electromagnetic valve is opened, the twelfth electromagnetic valve is opened, and the thirteenth electromagnetic valve is opened; the first reversing valve is communicated with the compressor; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in a high-load main heating mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, the tenth electromagnetic valve is opened, the eleventh electromagnetic valve is closed, the twelfth electromagnetic valve is opened, and the thirteenth electromagnetic valve is closed; the first reversing valve is communicated with the compressor; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in a low-load full heat recovery mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, the tenth electromagnetic valve is closed, the eleventh electromagnetic valve is opened, the twelfth electromagnetic valve is opened, and the thirteenth electromagnetic valve is opened; the first reversing valve is communicated with the compressor; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in the high-load full heat recovery mode, the first electromagnetic valve is closed, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, the tenth electromagnetic valve is closed and opened, the eleventh electromagnetic valve is closed, the twelfth electromagnetic valve is opened and the thirteenth electromagnetic valve is closed.
Correspondingly, the invention also provides an air conditioning device which comprises a heat recovery system; the heat recovery system is the multi-split air conditioner heat recovery system.
By adopting the technical scheme, the cold accumulation device and the heat accumulation device are added in the multi-split air conditioner heat recovery system, and energy is accumulated and discharged in different operation modes, so that the heat recovery multi-split air conditioner system can work in an optimal load area for a long time in each operation mode, and the energy utilization rate of the multi-split air conditioner system is improved; according to the invention, the energy storage device is added to store the energy of the heat recovery system in a low-load running state, when the system load is large, the stored energy is utilized, so that the multi-split system can run in an optimal load area for a long time, and in several running modes, if the indoor refrigeration requirement occupies a main body (namely, a complete refrigeration mode, a main body refrigeration mode) or the indoor refrigeration requirement is smaller (namely, the complete heating mode, the main body heating mode or the complete heat recovery mode), the multi-split system can always be in the optimal load running state, the corresponding cold storage device and the corresponding heat storage device can be canceled, the corresponding pipelines and valves can also be canceled, and the efficiency is higher.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a multi-split heat recovery system according to the present invention;
FIG. 2 is a schematic diagram of a low-load full refrigeration mode of the multi-split heat recovery system of the present invention;
FIG. 3 is a schematic diagram of a high load full refrigeration mode of the multi-split heat recovery system of the present invention;
FIG. 4 is a schematic diagram of a low-load main body refrigeration mode of the multi-split heat recovery system of the present invention;
FIG. 5 is a schematic diagram of a high-load main body refrigeration mode of the multi-split heat recovery system of the present invention;
FIG. 6 is a schematic diagram of a low load full heating mode of the multi-split heat recovery system of the present invention;
FIG. 7 is a schematic diagram of a high-load full heating mode of the multi-split heat recovery system of the present invention;
FIG. 8 is a schematic diagram of a low load main body heating mode of the multi-split heat recovery system of the present invention;
FIG. 9 is a schematic diagram of a heating mode of a high-load main body of the multi-split heat recovery system of the present invention;
FIG. 10 is a schematic diagram of a low load full heat recovery mode of the multi-split heat recovery system of the present invention;
FIG. 11 is a schematic diagram of a high load full heat recovery mode of the multi-split heat recovery system of the present invention.
In the figure: 1. a compressor; 2. an oil-gas separator; 3. a first four-way valve; 4. a second four-way valve; 5. a capillary tube; 6. an outdoor heat exchanger; 7. a first electronic expansion valve; 8. a one-way valve; 9. a first electromagnetic valve; 10. a second electromagnetic valve; 11. a third electromagnetic valve; 12. a second electronic expansion valve; 13. a cold storage device; 14. a fourth electromagnetic valve; 15. a fifth electromagnetic valve; 16. an indoor unit; 17. a sixth electromagnetic valve; 18. a seventh electromagnetic valve; 19. an eighth electromagnetic valve; 20. a ninth electromagnetic valve; 21. a tenth electromagnetic valve; 22. an eleventh electromagnetic valve; 23. a heat storage device; 24. a twelfth electromagnetic valve; 25. a thirteenth electromagnetic valve; 26. a gas-liquid separator.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 11, the present invention provides a multi-split heat recovery system, which includes a compressor assembly, an outdoor heat exchanger 6, an indoor unit 16, and a reversing valve; the compressor assembly comprises a compressor 1, an oil-gas separator 2 and a gas-liquid separator 26, wherein the oil-gas separator 2 is arranged at an exhaust port of the compressor 1 and is connected with the compressor 1, and the gas-liquid separator 26 is arranged at an air suction port of the compressor and is connected with the compressor 1; the reversing valve can be a two-way valve, a three-way valve or a four-way valve; the present embodiment is described with a four-way valve; the outdoor heat exchanger 6 is a condenser, and an evaporator is arranged in the indoor unit 16; specifically, one end of the oil-gas separator 2 is connected with the compressor 1, and the other end of the oil-gas separator is connected with the first four-way valve 3; one end of the outdoor heat exchanger 6 is connected with the first four-way valve 3, and the other end of the outdoor heat exchanger is connected with the indoor unit 16; the indoor unit 16 is connected with the gas-liquid separator 26, and the gas-liquid separator 16 is connected with the compressor 1; a throttle device is arranged between the outdoor heat exchanger 6 and the indoor unit 16; the throttling device comprises a first electronic expansion valve 7 and a second electronic expansion valve 12; a cold accumulation device 13 for accumulating or releasing cold energy of the refrigerant is further arranged between the throttling device and the indoor unit 16, the cold accumulation device 13 is used for storing the cold energy in different working conditions of the multi-split heat recovery system, and the second electronic expansion valve 12 is arranged between the cold accumulation device 13 and the first electronic expansion valve 7; further, two ends of the throttling device are connected in parallel with one-way valves 8; a first electromagnetic valve 9 is arranged between the throttling device and the indoor unit 16; an eighth electromagnetic valve 19 or a ninth electromagnetic valve 20 is arranged between the indoor unit 16 and the gas-liquid separator 26; a fifth electromagnetic valve 15 is arranged between the cold accumulation device 13 and the gas-liquid separator 16; by adopting the scheme, the multi-split heat recovery system has the following working modes:
first, low load full cooling mode:
as shown in FIG. 2, when the multi-split heat recovery system is operated at low load, the compressor operating frequency is low, the load needs to be lifted to enable the system to operate in an optimal load area, at this time, the energy of the system can be stored, and the system is the same when the system is operated at low load in other modes; the refrigerant compressed by the compressor 1 flows through the oil-gas separator 2 and the first four-way valve 3, then exchanges heat through the outdoor heat exchanger 6, the refrigerant after the heat exchange of the outdoor heat exchanger 6 flows through the one-way valve 8 and the first electronic expansion valve 7 and is divided into two paths, one path of the refrigerant is throttled by the second electronic expansion valve 12, the throttled refrigerant flows through the cold accumulation device 13 to store cold, and the part of the refrigerant flows back to the compressor 1 through the gas-liquid separator 26 instead of the indoor unit 16; the other path of refrigerant completes the normal refrigeration cycle through the indoor unit 16 and returns to the compressor 1 through the gas-liquid separator 26; as shown in fig. 2, specifically: the first solenoid valve 9 is open, the second solenoid valve 10 is open, the third solenoid valve 11 is closed, the fourth solenoid valve 14 is closed, the fifth solenoid valve 15 is open, and the eighth solenoid valve 19 is open;
second, high load full cooling mode:
as shown in fig. 3, when the system is operated at a high load, the compressor 1 is operated at a high frequency, the load is reduced to operate the system in an optimum load region, the energy stored in the cold storage device 13 is required to be released, and the system is operated at a low load in other modes, as is the case; the refrigerant compressed by the compressor 1 flows through the oil-gas separator 2 and the first four-way valve 3, then exchanges heat through the outdoor heat exchanger 6, flows through the one-way valve 8 and the first electronic expansion valve 7, then passes through the cold accumulation device 13 to obtain cold energy, then passes through the indoor unit for refrigeration, and finally returns to the compressor through the vapor-liquid separator 26; as shown in fig. 3, specifically: the first solenoid valve 9 is open, the second solenoid valve 10 is closed, the third solenoid valve 11 is open, the fourth solenoid valve 14 is open, the fifth solenoid valve 15 is closed, and the eighth solenoid valve 19 is open.
Preferably, in combination with the above-described scheme, as shown in fig. 1 to 3, in the present embodiment, the reversing valve is a four-way valve, and the four-way valve comprises a first four-way valve 3 and a second four-way valve 4; the indoor unit 16 includes a first indoor unit and a second indoor unit; one end of the first indoor unit is respectively connected with the second four-way valve 4 and the gas-liquid separator 26, and the other end of the first indoor unit is respectively connected with the second indoor unit and the first electronic expansion valve 7; one end of the second indoor unit is respectively connected with the first electronic expansion valve 7 and the first indoor unit, and the other end of the second indoor unit is respectively connected with the gas-liquid separator 26 and the second four-way valve 4; further, a sixth electromagnetic valve 17 is arranged between the first indoor unit and the second four-way valve 4; an eighth electromagnetic valve 19 is arranged between the first indoor unit and the gas-liquid separator 26; a seventh electromagnetic valve 18 is arranged between the second indoor unit and the second four-way valve 4; a ninth electromagnetic valve 20 is arranged between the second indoor unit and the gas-liquid separator 26; one end of the outdoor heat exchanger 6 is connected with the first four-way valve 3, and the other end of the outdoor heat exchanger is connected with the first electronic expansion valve 7; one end of the second four-way valve 4 is connected with the oil-gas separator 2, and the other end of the second four-way valve is connected with the indoor unit 16; a heat storage device 23 for storing or releasing the heat of the refrigerant is arranged between the second four-way valve 4 and the indoor unit 16; a thirteenth electromagnetic valve 25 is arranged between the second four-way valve 4 and the indoor unit 16; a twelfth electromagnetic valve 24 is arranged between the second four-way valve 4 and the heat storage device 23; a tenth electromagnetic valve 21 is arranged between the heat storage device 23 and the indoor unit 16; further, the cold storage device 13 is arranged in parallel with the flow path between the indoor unit 16 and the first electronic expansion valve 7; the cold accumulation loop is also provided with a second electronic expansion valve 12, and the second electronic expansion valve 12 is arranged between the cold accumulation device 13 and the first electronic expansion valve 8; the cold accumulation device 13 is connected with the gas-liquid separator 26; a second electromagnetic valve 10 is arranged between the second electronic expansion valve 12 and the first electronic expansion valve 8; a fourth electromagnetic valve 14 is arranged between the cold accumulation device 13 and the indoor unit 16; a fifth electromagnetic valve 15 is arranged between the cold accumulation device 13 and the gas-liquid separator 26; the two ends of the second electronic expansion valve 12 are connected in parallel with a third electromagnetic valve 11; one end of the third electromagnetic valve 11 is connected with the first electronic expansion valve 8, and the other end of the third electromagnetic valve is connected with the cold accumulation device 13; further, the capillary 5 comprises a first capillary and a second capillary; one end of the first capillary tube is connected with the first four-way valve 3, and the other end of the first capillary tube is connected with the gas-liquid separator 26; one end of the second capillary tube is connected with the second four-way valve 4, and the other end of the second capillary tube is connected with the gas-liquid separator 26; the first four-way valve 3 is provided with a first loop which is directly connected with the gas-liquid separator 26; the second four-way valve 4 is provided with a second loop which is directly connected with the gas-liquid separator 26; the first loop is connected with the first capillary in parallel; the second loop is connected with the second capillary in parallel; further, the heat storage device 23 is disposed in parallel with the flow path between the second four-way valve 4 and the indoor unit 16; the heat storage device 23 is connected with the first electronic expansion valve 7; an eleventh electromagnetic valve 22 is arranged between the heat storage device 23 and the first electronic expansion valve 7; by adopting the scheme, the multi-split heat recovery system has the following working modes:
third, low load main body cooling mode:
as shown in fig. 4, the refrigerant compressed by the compressor 1 is split into two paths after passing through the oil-gas separator 2, and one path of the refrigerant flows into the indoor unit 16 for heating through the second four-way valve 4; the other path of refrigerant flows through the first four-way valve 3, exchanges heat through the outdoor heat exchanger 6, passes through the one-way valve 8 and the first electronic expansion valve 7, is divided into two paths, one path of refrigerant is throttled by the second electronic expansion valve 12 and then is stored by the cold storage device 13, and the part of refrigerant directly returns to the compressor 1 without passing through the indoor unit 16; the other path of refrigerant and the refrigerant heated by the first indoor machine pass through the second indoor machine to be refrigerated and finally return to the compressor 1; as shown in fig. 4, specifically: the first solenoid valve 9 is open, the second solenoid valve 10 is open, the fourth solenoid valve 14 is closed, the fifth solenoid valve 15 is open, the sixth solenoid valve 17 is open, the seventh solenoid valve 18 is closed, the eighth solenoid valve 19 is closed, the ninth solenoid valve 20 is open, and the thirteenth solenoid valve 25 is open;
fourth, high load main body cooling mode:
as shown in fig. 5, the refrigerant compressed by the compressor 1 is divided into two paths after passing through the oil-gas separator 2, one path of refrigerant flows into the first indoor machine for heating through the second four-way valve 4, the other path of refrigerant flows through the first four-way valve 3, then passes through the outdoor heat exchanger 6 for heat exchange, then passes through the one-way valve 8 and the first electronic expansion valve 7, then passes through the cold accumulation device 13 to obtain cold energy, and then passes through the second indoor machine for cooling together with the refrigerant heated by the first indoor machine and finally returns to the compressor 1; as shown in fig. 5, specifically: the first solenoid valve 9 is opened, the second solenoid valve 10 is opened, the fourth solenoid valve 14 is opened, the fifth solenoid valve 15 is closed, the sixth solenoid valve 17 is opened, the seventh solenoid valve 18 is closed, the eighth solenoid valve 19 is closed, the eleventh solenoid valve 20 is opened, and the thirteenth solenoid valve 25 is opened;
fifth, low-load complete heating mode:
as shown in fig. 6, the refrigerant compressed by the compressor 1 passes through the oil-gas separator 2 and then passes through the second four-way valve 4, the refrigerant coming out of the second four-way valve 4 is divided into two paths, one path of the refrigerant stores energy through the heat storage device 23, the part of the refrigerant passes through the first electronic expansion valve 7 to be throttled and then returns to the compressor 1 through the outdoor heat exchanger 6 and the first loop of the first four-way valve 3, and the other path of refrigerant passes through the first electronic expansion valve 7 to be throttled and then returns to the compressor 1 through the first loop of the outdoor heat exchanger 6 and the first four-way valve 3 after being heated by the second indoor heat; as shown in fig. 6, specifically: the first solenoid valve 9 is open, the sixth solenoid valve 17 is open, the seventh solenoid valve 18 is open, the eighth solenoid valve 19 is closed, the ninth solenoid valve 20 is closed, the tenth solenoid valve 21 is closed, the eleventh solenoid valve 22 is open, the twelfth solenoid valve 24 is open, and the thirteenth solenoid valve 25 is open; the first four-way valve 3 is communicated with the compressor 1;
sixth, high-load complete heating mode:
as shown in fig. 7, the refrigerant compressed by the compressor 1 passes through the oil-gas separator 2 and then passes through the second four-way valve 4, the refrigerant coming out of the second four-way valve 4 obtains energy through the heat storage device 23, then the refrigerant is heated by the first indoor machine, the refrigerant coming out of the first indoor machine is throttled by the first electronic expansion valve 7 and then passes through the outdoor heat exchanger 6 and the first loop of the first four-way valve, and finally returns to the compressor 1; as shown in fig. 7, specifically: the first solenoid valve 9 is open, the sixth solenoid valve 17 is open, the seventh solenoid valve 18 is open, the eighth solenoid valve 19 is closed, the ninth solenoid valve 20 is closed, the tenth solenoid valve 21 is open, the eleventh solenoid valve 22 is closed, the twelfth solenoid valve 24 is open, and the thirteenth solenoid valve 25 is open;
seventh, low-load main body heating mode:
as shown in fig. 8, the refrigerant compressed by the compressor 1 passes through the oil-gas separator 2 and then passes through the second four-way valve 4, the refrigerant coming out of the second four-way valve 4 is divided into two paths, one path of the refrigerant stores energy through the heat storage device 23, and the part of refrigerant directly passes through the first electronic expansion valve 7 to be throttled and then passes through the outdoor heat exchanger 6 and the first four-way valve 3 to finally return to the compressor 1; the other path of refrigerant is heated by a first indoor machine and then is divided into two paths, the first path of refrigerant is cooled by a second indoor machine and then returns to the compressor 1 through the vapor-liquid separator 26, the second path of refrigerant is throttled by the first electronic expansion valve 7 and then returns to the compressor 1 through the outdoor heat exchanger 6 and the first loop of the first four-way valve 3; as shown in fig. 8, specifically: the first solenoid valve 9 is open, the sixth solenoid valve 17 is open, the seventh solenoid valve 18 is closed, the eighth solenoid valve 19 is closed, the ninth solenoid valve 20 is open, the tenth solenoid valve 21 is closed, the eleventh solenoid valve 22 is open, the twelfth solenoid valve 24 is open, and the thirteenth solenoid valve 25 is open; the first four-way valve 3 is communicated with the compressor 1;
eighth, high load main body heating mode:
as shown in fig. 9, the refrigerant compressed by the compressor 1 passes through the oil-gas separator 2 and then passes through the second four-way valve 4, the refrigerant coming out of the second four-way valve 4 obtains energy through the heat storage device 23, then is heated through the first indoor mechanism, the refrigerant coming out of the first indoor mechanism is divided into two paths, the first path is cooled through the second indoor machine and then returns to the compressor 1 through the vapor-liquid separator 26, the second path is throttled through the first electronic expansion valve 7 and finally returns to the compressor 1 through the outdoor heat exchanger 6 and the first loop of the first four-way valve 3; as shown in fig. 9, specifically: the first solenoid valve 9 is open, the sixth solenoid valve 17 is open, the seventh solenoid valve 18 is closed, the eighth solenoid valve 19 is closed, the ninth solenoid valve 20 is open, the tenth solenoid valve 21 is open, the eleventh solenoid valve 22 is closed, the twelfth solenoid valve 24 is open, and the thirteenth solenoid valve 25 is closed; the first four-way valve 3 is communicated with the compressor;
ninth, low load full heat recovery mode:
as shown in fig. 10, the low-load total heat recovery refrigerant flow path is substantially identical to the low-load main body heating, the only difference being: the refrigerant heated by the first indoor machine is not divided into two paths, but flows to the second indoor machine to be cooled and then returns to the compressor 1; as shown in fig. 10, specifically: the first solenoid valve 9 is open, the sixth solenoid valve 17 is open, the seventh solenoid valve 18 is closed, the eighth solenoid valve 19 is closed, the ninth solenoid valve 20 is open, the tenth solenoid valve 21 is closed, the eleventh solenoid valve 22 is open, the twelfth solenoid valve 24 is open, and the thirteenth solenoid valve 25 is open; the first four-way valve 3 is communicated with the compressor 1;
tenth, high load full heat recovery mode:
as shown in fig. 11, the high-load complete heat recovery refrigerant flow path is substantially identical to the high-load main body heating, the only difference being: the refrigerant heated by the first indoor machine is not divided into two paths, but flows to the second indoor machine to be cooled and then returns to the compressor 1; as shown in fig. 11, specifically: the first solenoid valve 9 is closed, the sixth solenoid valve 17 is open, the seventh solenoid valve 18 is closed, the eighth solenoid valve 19 is closed, the ninth solenoid valve 20 is open, the tenth solenoid valve 21 is closed and open, the eleventh solenoid valve 22 is closed, the twelfth solenoid valve 24 is open and the thirteenth solenoid valve 25 is closed.
Correspondingly, in combination with the scheme, the invention also provides an air conditioner, which comprises a heat recovery system; the heat recovery system is the multi-split air conditioner heat recovery system.
By adopting the technical scheme, the cold accumulation device and the heat accumulation device are added in the multi-split air conditioner heat recovery system, and energy is accumulated and discharged in different operation modes, so that the heat recovery multi-split air conditioner system can work in an optimal load area for a long time in each operation mode, and the energy utilization rate of the multi-split air conditioner system is improved; according to the invention, the energy storage device is added to store the energy of the heat recovery system in a low-load running state, when the system load is large, the stored energy is utilized, so that the multi-split system can run in an optimal load area for a long time, and in several running modes, if the indoor refrigeration requirement occupies a main body (namely, a complete refrigeration mode, a main body refrigeration mode) or the indoor refrigeration requirement is smaller (namely, the complete heating mode, the main body heating mode or the complete heat recovery mode), the multi-split system can always be in the optimal load running state, the corresponding cold storage device and the corresponding heat storage device can be canceled, the corresponding pipelines and valves can also be canceled, and the efficiency is higher.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the disclosed technology. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technology of the present invention fall within the protection scope of the present invention.
Claims (15)
1. The multi-split heat recovery system is characterized by comprising a compressor assembly, an outdoor heat exchanger, a throttling device, an indoor unit and a reversing valve; the compressor assembly comprises a compressor and an oil-gas separator, and the oil-gas separator is connected with an exhaust port of the compressor; the reversing valve comprises a first reversing valve and a second reversing valve; the first reversing valve is connected with the compressor assembly, one end of the outdoor heat exchanger is connected with the first reversing valve, and the other end of the outdoor heat exchanger is connected with the throttling device; one end of the second reversing valve is connected with the oil-gas separator, and the other end of the second reversing valve is connected with the indoor unit; one end of the indoor unit is connected with the second reversing valve, and the other end of the indoor unit is connected with the throttling device; a cold accumulation device for accumulating or releasing cold of the refrigerant is further arranged between the throttling device and the other end of the indoor unit; a heat storage device for accumulating or releasing heat of the refrigerant is arranged between one end of the indoor unit and the second reversing valve; the compressor assembly further comprises a gas-liquid separator, and the gas-liquid separator is connected with the air suction port of the compressor; the indoor unit comprises a first indoor unit and a second indoor unit; one end of the first indoor unit is respectively connected with the second reversing valve and the gas-liquid separator, and the other end of the first indoor unit is respectively connected with the second indoor unit and the throttling device; one end of the second indoor unit is connected with the throttling device and the first indoor unit respectively, and the other end of the second indoor unit is connected with the gas-liquid separator and the second reversing valve respectively.
2. The multiple on-line heat recovery system of claim 1, wherein the throttling device comprises a first electronic expansion valve; the gas-liquid separator is connected with the air suction port of the compressor; the cold accumulation device is connected with a flow path between the indoor unit and the first electronic expansion valve in parallel; the cold accumulation loop where the cold accumulation device is located is also provided with a second electronic expansion valve, and the second electronic expansion valve is arranged between the cold accumulation device and the first electronic expansion valve; the cold accumulation device is connected with the gas-liquid separator.
3. The multiple on-line heat recovery system according to claim 1, wherein the heat storage device is provided in parallel with a flow path between the second reversing valve and the indoor unit, and the heat storage device is connected with the throttle device.
4. The multiple on-line heat recovery system of claim 1, further comprising a one-way valve, the one-way valve and the throttling device being arranged in parallel; one end of the one-way valve is connected with the outdoor heat exchanger, and the other end of the one-way valve is connected with the cold accumulation device and/or the indoor unit; and the one-way valve is connected to the cold accumulation device and/or the indoor unit along the outdoor heat exchanger in a one-way.
5. The multiple on-line heat recovery system according to claim 2, wherein a first electromagnetic valve is provided between the first electronic expansion valve and the indoor unit; an eighth electromagnetic valve is arranged between the indoor unit and the gas-liquid separator; a fifth electromagnetic valve is arranged between the cold accumulation device and the gas-liquid separator; a second electromagnetic valve is arranged between the second electronic expansion valve and the first electronic expansion valve; a fourth electromagnetic valve is arranged between the cold accumulation device and the indoor unit; a fifth electromagnetic valve is arranged between the cold accumulation device and the gas-liquid separator; the cold accumulation device further comprises a third electromagnetic valve, one end of the third electromagnetic valve is connected with the first electronic expansion valve, and the other end of the third electromagnetic valve is directly connected with the cold accumulation device.
6. The multiple on-line heat recovery system according to claim 2, wherein a first electromagnetic valve is provided between the first electronic expansion valve and the indoor unit; a thirteenth electromagnetic valve is arranged between the second reversing valve and the indoor unit; a sixth electromagnetic valve is arranged between the first indoor unit and the second reversing valve; an eighth electromagnetic valve is arranged between the first indoor unit and the gas-liquid separator; a seventh electromagnetic valve is arranged between the second indoor unit and the second reversing valve; a ninth electromagnetic valve is arranged between the second indoor unit and the gas-liquid separator; a twelfth electromagnetic valve is arranged between the second reversing valve and the heat storage device; a tenth electromagnetic valve is arranged between the heat storage device and the indoor unit; an eleventh electromagnetic valve is arranged between the heat storage device and the throttling device.
7. The multiple on-line heat recovery system according to claim 2, wherein a thirteenth electromagnetic valve is provided between the second reversing valve and the indoor unit; a first electromagnetic valve is arranged between the first electronic expansion valve and the indoor unit; a sixth electromagnetic valve is arranged between the first indoor unit and the second reversing valve; an eighth electromagnetic valve is arranged between the first indoor unit and the gas-liquid separator; a seventh electromagnetic valve is arranged between the second indoor unit and the second reversing valve; a ninth electromagnetic valve is arranged between the second indoor unit and the gas-liquid separator; a fifth electromagnetic valve is arranged between the cold accumulation device and the gas-liquid separator; a second electromagnetic valve is arranged between the second electronic expansion valve and the first electronic expansion valve; a fourth electromagnetic valve is arranged between the cold accumulation device and the indoor unit; a fifth electromagnetic valve is arranged between the cold accumulation device and the gas-liquid separator; the cold accumulation device further comprises a third electromagnetic valve, one end of the third electromagnetic valve is connected with the first electronic expansion valve, and the other end of the third electromagnetic valve is directly connected with the cold accumulation device.
8. The multiple on-line heat recovery system according to any one of claims 1 to 7, wherein the reversing valve is a four-way valve; the outdoor heat exchanger is a condenser, and an evaporator is arranged in the indoor unit.
9. The multiple on-line heat recovery system of claim 1, further comprising a capillary tube; one end of the capillary tube is connected with the reversing valve, and the other end of the capillary tube is connected with the gas-liquid separator.
10. The multiple on-line heat recovery system of claim 1, further comprising a first capillary tube and a second capillary tube; one end of the first capillary tube is connected with the first reversing valve, and the other end of the first capillary tube is connected with the gas-liquid separator; one end of the second capillary tube is connected with the second reversing valve, and the other end of the second capillary tube is connected with the gas-liquid separator.
11. The multiple on-line heat recovery system of claim 10, wherein the first reversing valve is provided with a first circuit directly connected to the gas-liquid separator; the second reversing valve is provided with a second loop which is directly connected with the gas-liquid separator; the first loop is connected in parallel with the first capillary; the second loop is connected in parallel with the second capillary.
12. The multi-split heat recovery system of claim 5,
when the multi-split air conditioner heat recovery system is in a low-load complete refrigeration mode, the first electromagnetic valve is opened, and the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve and the eighth electromagnetic valve are opened; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in a high-load complete refrigeration mode, the first electromagnetic valve is opened, and the second electromagnetic valve is closed, the third electromagnetic valve is opened, the fourth electromagnetic valve is opened, the fifth electromagnetic valve is closed and the eighth electromagnetic valve is opened.
13. The multi-split heat recovery system of claim 7,
when the multi-split heat recovery system is in a low-load main body refrigeration mode, the first electromagnetic valve is opened, and the second electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the seventh electromagnetic valve, the eighth electromagnetic valve, the ninth electromagnetic valve and the thirteenth electromagnetic valve are opened; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in a high-load main body refrigeration mode, the first electromagnetic valve is opened, and the second electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the seventh electromagnetic valve, the eighth electromagnetic valve, the eleventh electromagnetic valve and the thirteenth electromagnetic valve are opened.
14. The multi-split heat recovery system of claim 6, wherein,
when the multi-split air conditioner heat recovery system is in a low-load full heating mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is opened, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is closed, the tenth electromagnetic valve is closed, the eleventh electromagnetic valve is opened, the twelfth electromagnetic valve is opened and the thirteenth electromagnetic valve is opened; the first reversing valve is communicated with the compressor; or alternatively, the first and second heat exchangers may be,
when the multi-split air conditioner heat recovery system is in a high-load full heating mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is opened, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is closed, the tenth electromagnetic valve is opened, the eleventh electromagnetic valve is closed, the twelfth electromagnetic valve is opened and the thirteenth electromagnetic valve is opened; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in a low-load main heating mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, the tenth electromagnetic valve is closed, the eleventh electromagnetic valve is opened, the twelfth electromagnetic valve is opened and the thirteenth electromagnetic valve is opened; the first reversing valve is communicated with the compressor; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in a high-load main heating mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, the tenth electromagnetic valve is opened, the eleventh electromagnetic valve is closed, the twelfth electromagnetic valve is opened and the thirteenth electromagnetic valve is closed; the first reversing valve is communicated with the compressor; or alternatively, the first and second heat exchangers may be,
when the multi-split air conditioner heat recovery system is in a low-load complete heat recovery mode, the first electromagnetic valve is opened, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, the tenth electromagnetic valve is closed, the eleventh electromagnetic valve is opened, the twelfth electromagnetic valve is opened and the thirteenth electromagnetic valve is opened; the first reversing valve is communicated with the compressor; or alternatively, the first and second heat exchangers may be,
when the multi-split heat recovery system is in the high-load full heat recovery mode, the first electromagnetic valve is closed, the sixth electromagnetic valve is opened, the seventh electromagnetic valve is closed, the eighth electromagnetic valve is closed, the ninth electromagnetic valve is opened, the tenth electromagnetic valve is closed and opened, the eleventh electromagnetic valve is closed, the twelfth electromagnetic valve is opened and the thirteenth electromagnetic valve is closed.
15. An air conditioning device comprises a heat recovery system; the multi-split heat recovery system according to any one of claims 1 to 14.
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| CN109579356B (en) * | 2018-12-21 | 2020-10-27 | 广东志高暖通设备股份有限公司 | Temperature control multi-online heat pump system with heat recovery function and control method |
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| JPH05302765A (en) * | 1992-04-27 | 1993-11-16 | Matsushita Refrig Co Ltd | Multi-chamber type air conditioner |
| CN106247665A (en) * | 2016-08-11 | 2016-12-21 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN207936367U (en) * | 2017-12-12 | 2018-10-02 | 珠海格力电器股份有限公司 | A kind of multi-connected machine heat recovery system and conditioner |
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| JPH05302765A (en) * | 1992-04-27 | 1993-11-16 | Matsushita Refrig Co Ltd | Multi-chamber type air conditioner |
| CN106247665A (en) * | 2016-08-11 | 2016-12-21 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN207936367U (en) * | 2017-12-12 | 2018-10-02 | 珠海格力电器股份有限公司 | A kind of multi-connected machine heat recovery system and conditioner |
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