CN104266423A - Air conditioner multi-split air conditioner system and defrosting method - Google Patents
Air conditioner multi-split air conditioner system and defrosting method Download PDFInfo
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- CN104266423A CN104266423A CN201410460876.4A CN201410460876A CN104266423A CN 104266423 A CN104266423 A CN 104266423A CN 201410460876 A CN201410460876 A CN 201410460876A CN 104266423 A CN104266423 A CN 104266423A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010257 thawing Methods 0.000 title claims abstract description 10
- 238000004378 air conditioning Methods 0.000 claims abstract description 29
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 6
- 239000003507 refrigerant Substances 0.000 abstract description 8
- 230000001276 controlling effect Effects 0.000 description 12
- 230000001603 reducing effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 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
- F24F5/001—Compression cycle type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner multi-split air conditioner system and a defrosting method. The air-conditioning multi-split system comprises a compressor, a four-way valve, an outdoor unit, an indoor unit, a main expansion valve and a main three-way valve for exhaust distribution control; the two ends of each internal machine are respectively provided with a high-temperature gas distribution control three-way valve and a refrigerant distribution control three-way valve which are connected with each internal machine through a common end; one branch end of each high-temperature gas distribution control three-way valve is connected to the common end of the main three-way valve; two branch ends of each refrigerant distribution control three-way valve are connected to a main expansion valve together, an expansion valve is arranged on a pipeline from one branch end of each refrigerant distribution control three-way valve to the main expansion valve, and the main expansion valve is connected with an outdoor unit. By adopting the air-conditioning multi-split system, when part of the internal machines are in the use state and part of the internal machines are in the non-use state, the internal machines in the non-use state can be used as the evaporator, so that the influence of defrosting on the temperature and the comfort level of a room is reduced.
Description
Technical field
The present invention relates to air-conditioning system, particularly relate to a kind of air conditioning multi-couple machine system and Defrost method.
Background technology
Existing air conditioning multi-couple machine system, the interior machine terminal of indoor units is many, off-premises station frosting area large and frosting degree is many, during defrosting, in each terminal, machine passes through owing to there being colder refrigerant, all has reducing effect, have considerable influence to the comfort of user to room temperature, the sense of user's temperature.Although also develop many technology optimizing defrosting in current industry, these technology ubiquities increase extra cost and device, and the problem of defrosting effect difference.
Summary of the invention
A kind of air conditioning multi-couple machine system and Defrost method are provided in the embodiment of the present invention, in part, machine is in using state, in part, machine is when being in unused state, and the interior machine being in using state can continue heat supply, reduces the impact of defrost phase on room temperature and comfort level.
For solving the problems of the technologies described above, the embodiment of the present invention provides a kind of air conditioning multi-couple machine system, comprise the compressor, cross valve, outdoor unit, indoor units and the main expansion valve that are connected by pipeline, described indoor units at least comprises two interior machines, and described air conditioning multi-couple machine system also comprises for being vented the main triple valve distributing and control; The two ends of each described interior machine are respectively equipped with the high-temperature gas be connected with each described interior machine by common port and distribute and control triple valve and cold-producing medium and distribute and control triple valve; Each described high-temperature gas distributes the common port that the branch end controlling triple valve is connected to described main triple valve jointly; Each described cold-producing medium distributes two branch end controlling triple valve and is jointly connected to main expansion valve, distribute at each described cold-producing medium the branch end controlling triple valve and be respectively arranged with expansion valve to the pipeline of described main expansion valve, described main expansion valve is connected with outdoor unit.
As preferably, each described high-temperature gas distributes the common port that the first branch end controlling triple valve is connected to described main triple valve jointly, and the second branch end is connected to a branch end of cross valve jointly.
As preferably, each described cold-producing medium distributes the first branch end controlling triple valve and is jointly connected to described main expansion valve, and the second branch end is provided with expansion valve correspondingly respectively to the pipeline of described main expansion valve.
As preferably, the first branch end of described main triple valve communicates with the exhaust outlet of compressor, and the second branch end communicates with the air entry of compressor.
Another aspect of the present invention, also provide a kind of Defrost method of air conditioning multi-couple machine system, described Defrost method comprises: S1: judge whether the interior machine of indoor units is all in using state; S2: when judge all in machine be all in using state, when systems axiol-ogy is to defrost signal, conveniently defrosting mode run; S3: when judgement has at least an interior machine to be in unused state, and machine is using in other, when systems axiol-ogy is to defrost signal, cross valve switches to refrigeration mode, main expansion valve is opened into maximum opening, the passage that main triple valve is communicated with exhaust outlet of compressor is opened, the cold-producing medium being in the interior machine connection of unused state distributes the control passage that triple valve is communicated with expansion valve and opens, and the high-temperature gas that the interior machine being in unused state connects distributes the control passage that triple valve is communicated with cross valve and opens; S4 a: part for the high-temperature exhaust air of compressor passes into outdoor unit by cross valve and carries out defrost, remaining part is fed by main triple valve and is in just machine in using state, keeps heat supply; S5: the cold-producing medium completing thermal procession enters the expansion valve of the machine in unused state that is in from compressor, being in unused state evaporation endothermic in machine, distributed by the high-temperature gas be connected with the machine in unused state that is in and control triple valve and cross valve, get back to compressor.
Air conditioning multi-couple machine system of the present invention, comprises the compressor, cross valve, outdoor unit, indoor units and the main expansion valve that are connected by pipeline, also comprises for being vented the main triple valve distributing and control; The two ends of each interior machine are respectively equipped with the high-temperature gas be connected with each interior machine by common port and distribute and control triple valve and cold-producing medium and distribute and control triple valve; Each high-temperature gas distributes the common port that the branch end controlling triple valve is connected to main triple valve jointly; Each cold-producing medium distributes two branch end controlling triple valve and is jointly connected to main expansion valve, and distribute at each cold-producing medium the branch end controlling triple valve and be respectively arranged with expansion valve to the pipeline of main expansion valve, main expansion valve is connected with outdoor unit.Owing to adopting above-mentioned technical scheme, air conditioning multi-couple machine system of the present invention, in part, machine is in using state, when in part, machine is in unused state, when defrosting, part high-temperature exhaust air also passes into the interior machine being in using state and continues heat supply, and the interior machine being in unused state serves as evaporimeter to realize the thermal procession of heat absorption, both ensure that the interior machine being in using state kept the comfort level in room, make use of again be in unused state interior machine heat exchanger as evaporimeter to increase the compressor return air degree of superheat, meet the defrost requirements of multiple on-line system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the air conditioning multi-couple machine system of the embodiment of the present invention;
Fig. 2 is the refrigeration cyclic graph of the air conditioning multi-couple machine system of the embodiment of the present invention;
Fig. 3 be the air conditioning multi-couple machine system of the embodiment of the present invention heat circular chart;
Fig. 4 is the defrost cycle figure of the air conditioning multi-couple machine system of the embodiment of the present invention;
Fig. 5 is another defrost cycle figure of the air conditioning multi-couple machine system of the embodiment of the present invention.
Description of reference numerals:
1,2,3,4, interior machine; 10, indoor units; 11a, 12a, 13a, 14a, high-temperature gas distribute control triple valve; 11b, 12b, 13b, 14b, cold-producing medium distribute control triple valve; 11,12,13,14, expansion valve; 20, outdoor unit; 30, cross valve; 40, main expansion valve; 50, compressor; 60, main triple valve.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
Fig. 1 is the structural representation of the air conditioning multi-couple machine system of the embodiment of the present invention.Air conditioning multi-couple machine system as shown in Figure 1, comprise the compressor 50, cross valve 30, outdoor unit 20, indoor units 10, main expansion valve 40 and the main triple valve 60 for being vented distribution control that are connected by pipeline, indoor units 10 comprises interior machine 1,2,3,4, and the two ends of each interior machine 1,2,3,4 are respectively equipped with holds the high-temperature gas be connected with each interior machine 1,2,3,4 to distribute to control triple valve 11a, 12a, 13a, 14a and cold-producing medium to distribute by A to control triple valve 11b, 12b, 13b, 14b.In the present embodiment, indoor units 10 comprises four indoor apparatus of air conditioner, in a unshowned embodiment, as long as indoor units 10 comprises two or more indoor apparatus of air conditioner, just can realize object of the present invention.
Each high-temperature gas distributes the A end that the B end controlling triple valve 11a, 12a, 13a, 14a is connected to main triple valve 60 jointly, and C end is communicated with a branch end of cross valve 30.The C end of main triple valve 60 communicates with the air entry of compressor 50, and B end communicates with the exhaust outlet of compressor 50.
The B end of each cold-producing medium distribution control triple valve 11b, 12b, 13b, 14b is jointly connected to main expansion valve 40, C end and is provided with expansion valve 11,12,13,14 respectively correspondingly to the pipeline of main expansion valve 40, and main expansion valve 40 is connected with outdoor unit 20.
In the embodiment of the present invention, the common port of each triple valve is A end, and the first branch end is B end, and the second branch end is C end.Certainly, the connected mode of each triple valve in the embodiment of the present invention is only preferred mode, by other connected modes, such as high-temperature gas distributes control triple valve 11a, 12a, 13a, the C end of 14a is connected to the public A end of main triple valve 60 respectively, the common port being communicated with cross valve 30 of B end, or high-temperature gas distributes control triple valve 11a, the C end of 12a is connected to the public A end of main triple valve 60 respectively, the common port being communicated with cross valve 30 of B end, high-temperature gas distributes control triple valve 13a, the B end of 14a is connected to the public A end of main triple valve 60 respectively, the common port being communicated with cross valve 30 of C end, also object of the present invention can be realized.
Fig. 2 is the refrigeration cyclic graph of the air conditioning multi-couple machine system of the embodiment of the present invention, as shown in Figure 2, in cooling mode, cross valve 30 switches to refrigeration mode, cold-producing medium distributes control triple valve 11b, 12b, 13b, 14b and is in AC conducting, and high-temperature gas distributes control triple valve 11a, 12a, 13a, 14a and is in AC conducting.Now, main triple valve 60 is in the state of blocking, the high-temperature exhaust air of compressor 50 is direct in outdoor unit 20 heat exchange condensation through cross valve 30, enter expansion valve 9,10,11,12 place by main expansion valve 40 after completing and carry out reducing pressure by regulating flow, lower temperature refrigeration agent enters evaporation endothermic in indoor units 60, reduce room temperature, realize the object of cooling; Period distributes by high-temperature gas the AC/CA method of salary distribution controlling triple valve 11a, 12a, 13a, 14a and cold-producing medium distribution control triple valve 11b, 12b, 13b, 14b and flows into corresponding interior machine 1,2,3,4 evaporation and heat-exchange, and two phase refrigerant is imported compressor 50 by pipeline subsequently.
Fig. 3 be the air conditioning multi-couple machine system of the embodiment of the present invention heat circular chart, as shown in Figure 3, in a heating mode, cross valve 30 switches to heating mode, cold-producing medium distributes control triple valve 11b, 12b, 13b, 14b and is in AB conducting, and high-temperature gas distributes control triple valve 11a, 12a, 13a, 14a and is in AC conducting.Now, main triple valve 60 is in the state of blocking, high-temperature exhaust air directly enters high-temperature gas through cross valve 30 and distributes the AC distribution controlling triple valve 11a, 12a, 13a, 14a runner, enter each interior machine and carry out condensation heat release, heat release is carried out with room air, heat rooms temperature, import cold-producing medium subsequently and distribute the AB runner controlling triple valve 11b, 12b, 13b, 14b, carry out converging before main expansion valve 40 and enter main expansion valve 40 reducing pressure by regulating flow, low-temperature refrigerant gathers into outdoor unit 20 evaporating getter subsequently, gets back to compressor 50 after completing.
Fig. 4 is the defrost cycle figure of the air conditioning multi-couple machine system of the embodiment of the present invention, as shown in Figure 4, interior machine 1,2 is in using state, interior machine 3,4 is in unused state, when systems axiol-ogy is to defrost signal, cross valve 30 switches to refrigeration mode, and main expansion valve 40 opens maximum opening, the AB passage of main triple valve 60 is opened, and the high-temperature gas being in interior machine 3,4 two ends of unused state distributes control triple valve 13a, 14a and cold-producing medium distribution control triple valve 13b, 14b unlatching AC/CA passage.
A part for the high-temperature exhaust air of compressor 50 passes into outdoor unit 20 by cross valve 30 and carries out defrost, remaining part feeds interior machine 1,2 by main triple valve 60 and keeps heat supply, the cold-producing medium completing thermal procession converges before the main expansion valve 40 of interior machine 3,4, cold-producing medium after converging after expansion valve 13,14 reducing pressure by regulating flow, evaporation endothermic in interior machine 3,4; Refrigerant superheat degree after part heat exchange, can be distributed by high-temperature gas and controls triple valve 13a, 14a and cross valve 30, get back to compressor 50 with air in interior machine 3,4.By above-mentioned circulation, the machine 1,2 in part that realizes is in using state, and in part, machine 3,4 is when being in unused state, and minimizing defrost phase is on the impact of room temperature and comfort level.
Fig. 5 is another defrost cycle figure of the air conditioning multi-couple machine system of the embodiment of the present invention, and as shown in Figure 5, interior machine 1,3 is in using state, and interior machine 2,4 is in unused state.When systems axiol-ogy is to defrost signal, cross valve 30 switches to refrigeration mode, main expansion valve 40 opens maximum opening, the AB passage of main triple valve 60 is opened, and the high-temperature gas at interior machine 2,4 two ends distributes control triple valve 12a, 14a and cold-producing medium distributes control triple valve 12b, 14b unlatching AC/CA passage.
A part for compressor 50 high-temperature exhaust air passes into outdoor unit 20 by cross valve 30 and carries out defrost, remaining part feeds interior machine 1,3 by main triple valve 60 and keeps heat supply, the cold-producing medium completing thermal procession converges before main expansion valve 40, expansion valve 12,14 reducing pressure by regulating flow of cold-producing medium after converging subsequently through being communicated with interior machine 2,4, evaporation endothermic in interior machine 2,4, after refrigerant superheat degree gets a promotion, distributed by high-temperature gas and control triple valve 12a, 14a and cross valve 30, get back to compressor 50.By above-mentioned circulation, reduce the impact of defrost phase on room temperature and comfort level.
In the embodiment of the present invention, when in judging, machine 1,2,3,4 is all in using state, conveniently defrosting mode runs.
Certainly, be more than the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art, under the prerequisite not departing from its general principles, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (5)
1. an air conditioning multi-couple machine system, comprise the compressor, cross valve, outdoor unit, indoor units and the main expansion valve that are connected by pipeline, described indoor units at least comprises two interior machines, it is characterized in that, described air conditioning multi-couple machine system also comprises for being vented the main triple valve distributing and control; The two ends of each described interior machine are respectively equipped with the high-temperature gas be connected with each described interior machine by common port and distribute and control triple valve and cold-producing medium and distribute and control triple valve; Each described high-temperature gas distributes the common port that the branch end controlling triple valve is connected to described main triple valve jointly; Each described cold-producing medium distributes two branch end controlling triple valve and is jointly connected to main expansion valve, distribute at each described cold-producing medium the branch end controlling triple valve and be respectively arranged with expansion valve to the pipeline of described main expansion valve, described main expansion valve is connected with outdoor unit.
2. air conditioning multi-couple machine system as claimed in claim 1, is characterized in that, each described high-temperature gas distributes the common port that the first branch end controlling triple valve is connected to described main triple valve jointly, and the second branch end is connected to a branch end of cross valve jointly.
3. air conditioning multi-couple machine system as claimed in claim 2, it is characterized in that, each described cold-producing medium distributes the first branch end controlling triple valve and is jointly connected to described main expansion valve, and the second branch end is provided with expansion valve correspondingly respectively to the pipeline of described main expansion valve.
4. the air conditioning multi-couple machine system as described in any one of claim 1-3, is characterized in that, the first branch end of described main triple valve communicates with the exhaust outlet of compressor, and the second branch end communicates with the air entry of compressor.
5. a Defrost method for air conditioning multi-couple machine system as claimed in claim 1, is characterized in that, described Defrost method comprises:
S1: judge whether the interior machine of indoor units is all in using state;
S2: when judge all in machine be all in using state, when systems axiol-ogy is to defrost signal, conveniently defrosting mode run;
S3: when judgement has at least an interior machine to be in unused state, and machine is using in other, when systems axiol-ogy is to defrost signal, cross valve switches to refrigeration mode, main expansion valve is opened into maximum opening, the passage that main triple valve is communicated with exhaust outlet of compressor is opened, the cold-producing medium being in the interior machine connection of unused state distributes the control passage that triple valve is communicated with expansion valve and opens, and the high-temperature gas that the interior machine being in unused state connects distributes the control passage that triple valve is communicated with cross valve and opens;
S4 a: part for the high-temperature exhaust air of compressor passes into outdoor unit by cross valve and carries out defrost, remaining part is fed by main triple valve and is in just machine in using state, keeps heat supply;
S5: the cold-producing medium completing thermal procession enters the expansion valve of the machine in unused state that is in from compressor, being in unused state evaporation endothermic in machine, distributed by the high-temperature gas be connected with the machine in unused state that is in and control triple valve and cross valve, get back to compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460876.4A CN104266423B (en) | 2014-09-11 | 2014-09-11 | Defrosting method for air conditioner multi-split air conditioner system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460876.4A CN104266423B (en) | 2014-09-11 | 2014-09-11 | Defrosting method for air conditioner multi-split air conditioner system |
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| Publication Number | Publication Date |
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| CN104266423A true CN104266423A (en) | 2015-01-07 |
| CN104266423B CN104266423B (en) | 2017-05-24 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288563A (en) * | 2016-08-31 | 2017-01-04 | 南京五洲制冷集团有限公司 | Defrosting system for ultra-low-loop temperature air source source pump |
| CN107461877A (en) * | 2017-07-19 | 2017-12-12 | 青岛海尔空调电子有限公司 | A kind of multiple on-line system defrosting control method |
| CN108088031A (en) * | 2017-12-01 | 2018-05-29 | 芜湖美智空调设备有限公司 | Defrosting control method, multi-split air conditioner and the storage medium of multi-split air conditioner |
| CN109458699A (en) * | 2018-11-08 | 2019-03-12 | 珠海格力电器股份有限公司 | Multi-online defrosting method and device, storage medium, computer equipment and air conditioner |
| CN111219803A (en) * | 2020-01-09 | 2020-06-02 | 珠海格力电器股份有限公司 | Multi-split air conditioner and defrosting method thereof |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN112797570A (en) * | 2020-12-30 | 2021-05-14 | 宁波奥克斯电气股份有限公司 | Defrosting control method, defrosting device and multi-connected air conditioning system |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| CN114322206A (en) * | 2020-09-29 | 2022-04-12 | 美的集团武汉制冷设备有限公司 | Multi-split air conditioner and defrosting method, control device and storage medium thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106288563A (en) * | 2016-08-31 | 2017-01-04 | 南京五洲制冷集团有限公司 | Defrosting system for ultra-low-loop temperature air source source pump |
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| US11919363B2 (en) | 2017-08-25 | 2024-03-05 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
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| CN108088031B (en) * | 2017-12-01 | 2021-02-26 | 芜湖美智空调设备有限公司 | Defrosting control method for multi-split air conditioner, multi-split air conditioner and storage medium |
| CN109458699A (en) * | 2018-11-08 | 2019-03-12 | 珠海格力电器股份有限公司 | Multi-online defrosting method and device, storage medium, computer equipment and air conditioner |
| CN111219803A (en) * | 2020-01-09 | 2020-06-02 | 珠海格力电器股份有限公司 | Multi-split air conditioner and defrosting method thereof |
| CN114322206A (en) * | 2020-09-29 | 2022-04-12 | 美的集团武汉制冷设备有限公司 | Multi-split air conditioner and defrosting method, control device and storage medium thereof |
| CN112797570A (en) * | 2020-12-30 | 2021-05-14 | 宁波奥克斯电气股份有限公司 | Defrosting control method, defrosting device and multi-connected air conditioning system |
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