CN105509384A - Defrosting method of multi-split air conditioning system and multi-split air conditioning system - Google Patents
Defrosting method of multi-split air conditioning system and multi-split air conditioning system Download PDFInfo
- Publication number
- CN105509384A CN105509384A CN201510955944.9A CN201510955944A CN105509384A CN 105509384 A CN105509384 A CN 105509384A CN 201510955944 A CN201510955944 A CN 201510955944A CN 105509384 A CN105509384 A CN 105509384A
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- Prior art keywords
- heat exchanger
- air conditioning
- outdoor heat
- flow
- refrigerant
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
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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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
- F25B2347/021—Alternate defrosting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/09—Improving heat transfers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a defrosting method of a multi-split air conditioning system and the multi-split air conditioning system, belongs to the field of air conditioning devices and defrosting methods thereof, and aims to solve such problems as incomplete defrosting of a traditional device. The defrosting method of the multi-split air conditioning system has the step of changing a heating mode to a refrigerating mode through reversing of a four-way valve, so that the flowing speeds of a refrigerant in an outdoor heat exchanger and at least one part of pipelines are nonuniform, and the alternation of high-speed flowing and low-speed flowing is generated. The multi-split air conditioning system is provided with a flowing speed control device on a pipeline between the outdoor heat exchanger and an indoor electronic expansion valve; and the flowing speed control device is communicated to a control device through signals. The defrosting method of the multi-split air conditioning system and the multi-split air conditioning system use alternation between high-speed flowing and low-speed flowing of the refrigerant for fully melting frost on the outdoor heat exchanger to prevent generation of heat exchange dead angles, so that the defrosting is faster and more thorough.
Description
Technical field
The present invention relates to aircondition and Defrost method field thereof, particularly relating to a kind of Defrost method of air conditioning multi-couple machine system and the air conditioning multi-couple machine system for realizing this Defrost method.
Background technology
Can because outdoor temperature is low in outdoor heat exchanger surface frosting during air conditioning multi-couple machine system heating operation, frosting can cause heat transfer effect to worsen, along with the heating capacity of the thickening multiple on-line system of frost layer can be decayed.
Defrost method main at present adopts cross valve commutation, and multiple on-line system becomes kind of refrigeration cycle from heating circulation, that is, outdoor unit heat exchanger becomes condenser.The high temperature and high pressure gas now flowing through outdoor heat exchanger can melt rapidly the frost layer on its surface.
The defect of this method is because multiple on-line system outdoor heat exchanger area is large, each cold medium flux along separate routes of outdoor heat exchanger wind speed field inconsistent (subregion wind speed is high, subregion wind speed is low), outdoor heat exchanger distributes unequal problem and the required defrost time can be caused long, local defrost can be caused unclean because of low flow velocity dead band, subregion, defrost weak effect.
Summary of the invention
An object of the present invention is to propose a kind of defrost more rapidly, the Defrost method of cleaner air conditioning multi-couple machine system.
Another object of the present invention proposes a kind of air conditioning multi-couple machine system realizing above-mentioned Defrost method.
For reaching this object, on the one hand, the present invention is by the following technical solutions:
A Defrost method for air conditioning multi-couple machine system, becomes refrigeration mode by cross valve commutation by heating mode, make refrigerant outdoor heat exchanger and at least partly in pipeline flowing velocity uneven, produce flow at high speed and low speeds flow alternately.
Particularly, described Defrost method comprises the steps:
Step S1, described cross valve commutate, and the high pressure gaseous refrigerant that compressor is discharged flows into outdoor heat exchanger after oil eliminator and described cross valve;
Step S2, high pressure gaseous refrigerant melt the frost layer on described outdoor heat exchanger surface, and refrigerant is condensed into high-pressure liquid refrigerant;
Step S3, described high-pressure liquid refrigerant flow out described outdoor heat exchanger, flow in current velocity controller by the road;
The state that after step S4, described high-pressure liquid refrigerant flow out from described current velocity controller, formation flow at high speed and low speeds flow alternate;
Step S5, described high-pressure liquid refrigerant become low-pressure low-temperature two-phase refrigerant through indoor electronic expansion valve reducing pressure by regulating flow; Described low-pressure low-temperature two-phase refrigerant gasifies after indoor heat exchanger heat exchange, gets back to described compressor through described cross valve and gas-liquid separator.
Further, in step s 4 which, described high-pressure liquid refrigerant is the state that the flow at high speed of setting cycle L and low speeds flow alternate.
Further, described setting cycle L is 25 seconds, 30 seconds, 35 seconds or 40 seconds.
Particularly, the numerical value of described setting cycle L is adjusted according to the frost thickness on described outdoor heat exchanger (5) surface.
On the other hand, the present invention is by the following technical solutions:
A kind of air conditioning multi-couple machine system for realizing above-mentioned Defrost method, comprise the compressor, oil eliminator, cross valve, outdoor heat exchanger, indoor electronic expansion valve, indoor heat exchanger and the gas-liquid separator that are connected by pipeline, pipeline between outdoor heat exchanger and indoor electronic expansion valve is provided with current velocity controller, and described current velocity controller signal communication is to control device.
Particularly, described current velocity controller comprises the expansion valve and magnetic valve that are in parallel; The high-pressure liquid refrigerant flowed out from described outdoor heat exchanger when described magnetic valve is opened through described magnetic valve high velocity stream to described electric expansion valve, the high-pressure liquid refrigerant flowed out from described outdoor heat exchanger when described closed electromagnetic valve through described expansion valve low-speed flow to described electric expansion valve.
Particularly, have at least one frost thickness checkout gear in the arranged outside of described outdoor heat exchanger, described frost thickness checkout gear signal communication is to control device.
Particularly, the pipeline between described oil eliminator and described cross valve is provided with check valve.
The Defrost method of air conditioning multi-couple machine system of the present invention makes refrigerant flowing velocity in outdoor heat exchanger and at least part of pipeline thereof uneven, what utilize refrigerant flow at high speed and low speeds flow replaces the frost fully melted on outdoor heat exchanger, avoid produce heat exchanging corner, defrost more rapidly, cleaner.
Be provided with current velocity controller in air conditioning multi-couple machine system of the present invention, utilize current velocity controller to regulate the flow velocity of refrigerant, defrost more rapidly, more thorough.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the air conditioning multi-couple machine system that the preferred embodiment of the present invention one provides;
Fig. 2 is the schematic diagram of the air conditioning multi-couple machine system that the preferred embodiment of the present invention two provides.
Be labeled as in figure:
1, compressor; 2, oil eliminator; 3, check valve; 4, cross valve; 5, outdoor heat exchanger; 6, expansion valve; 7, magnetic valve; 8, indoor electronic expansion valve; 9, indoor heat exchanger; 10, gas-liquid separator; 11, current velocity controller.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.
Preferred embodiment one:
This preferred embodiment discloses a kind of Defrost method of air conditioning multi-couple machine system.This Defrost method is commutated by cross valve 4 and heating mode is become refrigeration mode, make refrigerant outdoor heat exchanger 5 and at least partly in pipeline flowing velocity uneven, produce flow at high speed and low speeds flow alternately.
It is made to be that flow at high speed and low speeds flow replace by the flow velocity changing refrigerant, strengthen the disturbance in outdoor heat exchanger 5 of high pressure gaseous refrigerant, fluctuation, refrigerant is avoided to produce dead angle in outdoor heat exchanger 5, thus the defrost effect of strengthening multiple on-line system off-premises station.
The concrete steps of this Defrost method are not limit, and can realize refrigerant flow rate and fluctuate.Preferably, this Defrost method comprises the steps:
Step S1, cross valve 4 commutate, and the high pressure gaseous refrigerant that compressor 1 is discharged flows into outdoor heat exchanger 5 after oil eliminator 2 and cross valve 4.
Step S2, high pressure gaseous refrigerant melt the frost layer on outdoor heat exchanger 5 surface, and refrigerant is condensed into high-pressure liquid refrigerant.
Step S3, high-pressure liquid refrigerant delivery chamber external heat exchanger 5, flow in expansion valve 6 and/or magnetic valve 7 by the road.
Step S4, high-pressure liquid refrigerant flow out from expansion valve 6 and/or magnetic valve 7 state that rear formation flow at high speed and low speeds flow alternate.Preferably, high-pressure liquid refrigerant is the state that the flow at high speed of setting cycle L and low speeds flow alternate.
The aperture of magnetic valve 7 is much larger than the aperture of expansion valve 6.When magnetic valve 7 is opened, refrigerant mainly flows through magnetic valve 7, and refrigerant flow resistance is little, flow is large; When magnetic valve 7 cuts out, refrigerant only can flow through expansion valve 6, and refrigerant flow resistance is large, flow is little.With certain hour be the opening and closing of cycle frequent Controlling solenoid valve can realize refrigerant in pipeline and outdoor heat exchanger 5 by phased manner with at a high speed, low speed alternately flowing, strengthen refrigerant to flow in outdoor heat exchanger 5 and the disturbance of heat exchange, enhance heat transfer effect, to reduce in heat exchanger the heat exchange dead band formed because local velocity is little, make outdoor heat exchanger 5 defrost more rapidly, cleaner.
The concrete numerical value of this setting cycle L is not limit, and preferably, setting cycle L is 25 seconds, 30 seconds, 35 seconds or 40 seconds.The numerical value of setting cycle L can also be adjusted according to the frost thickness on outdoor heat exchanger 5 surface, such as longer in defrosting initial setting period L, after defrosting and acquiring a certain degree, shorten setting cycle L, increase the level of disruption of refrigerant to accelerate defrosting.
Step S5, high-pressure liquid refrigerant become low-pressure low-temperature two-phase refrigerant through indoor electronic expansion valve 8 reducing pressure by regulating flow; Low-pressure low-temperature two-phase refrigerant gasifies after indoor heat exchanger 9 heat exchange, gets back to compressor 1 through cross valve 4 and gas-liquid separator 10.
As shown in Figure 1, the air conditioning multi-couple machine system for realizing this Defrost method comprises the compressor 1, oil eliminator 2, cross valve 4, outdoor heat exchanger 5, expansion valve 6, magnetic valve 7, indoor electronic expansion valve 8, indoor heat exchanger 9 and the gas-liquid separator 10 that are connected by pipeline.When magnetic valve 7 is opened outdoor heat exchanger 5 flow out high-pressure liquid refrigerant through magnetic valve 7 high velocity stream to electric expansion valve 8, when magnetic valve 7 cuts out outdoor heat exchanger 5 flow out high-pressure liquid refrigerant through expansion valve 6 low-speed flow to electric expansion valve 8.
On the basis of said structure, can have at least one frost thickness checkout gear in the arranged outside of outdoor heat exchanger 5, frost thickness checkout gear signal communication, to control device, adjusts the numerical value of setting cycle L according to frost thickness.
On the basis of said structure, the pipeline between oil eliminator 2 and cross valve 4 can be provided with check valve 3, ensure that refrigerant can not in reverse inflow oil eliminator 2 and compressor 1.
Preferred embodiment two:
This preferred embodiment discloses a kind of Defrost method of air conditioning multi-couple machine system and the air conditioning multi-couple machine system for realizing this Defrost method.As shown in Figure 2, the air conditioning multi-couple machine system for realizing this Defrost method comprises the compressor 1, oil eliminator 2, cross valve 4, outdoor heat exchanger 5, current velocity controller 11, indoor electronic expansion valve 8, indoor heat exchanger 9 and the gas-liquid separator 10 that are connected by pipeline.Current velocity controller 11 signal communication is to control device.
The concrete structure of current velocity controller 11 is not limit, and can to adjust between outdoor heat exchanger 5 and indoor electronic expansion valve 8 refrigerant flow rate in pipeline.Accordingly, the concrete middle slight change of this Defrost method:
Step S3, high-pressure liquid refrigerant delivery chamber external heat exchanger 5, flow in current velocity controller 11 by the road;
Step S4, high-pressure liquid refrigerant flow out from current velocity controller 11 state that rear formation flow at high speed and low speeds flow alternate.
Note, the know-why that above are only preferred embodiment of the present invention and use.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (9)
1. the Defrost method of an air conditioning multi-couple machine system, it is characterized in that, by cross valve (4) commutation, heating mode is become refrigeration mode, make refrigerant outdoor heat exchanger (5) and at least partly in pipeline flowing velocity uneven, produce flow at high speed and low speeds flow alternately.
2. the Defrost method of air conditioning multi-couple machine system according to claim 1, is characterized in that, described Defrost method comprises the steps:
Step S1, described cross valve (4) commutate, and the high pressure gaseous refrigerant that compressor (1) is discharged flows into outdoor heat exchanger (5) after oil eliminator (2) and described cross valve (4);
Step S2, high pressure gaseous refrigerant melt the frost layer on described outdoor heat exchanger (5) surface, and refrigerant is condensed into high-pressure liquid refrigerant;
Step S3, described high-pressure liquid refrigerant flow out described outdoor heat exchanger (5), flow in current velocity controller (11) by the road;
The state that after step S4, described high-pressure liquid refrigerant flow out from described current velocity controller (11), formation flow at high speed and low speeds flow alternate;
Step S5, described high-pressure liquid refrigerant become low-pressure low-temperature two-phase refrigerant through indoor electronic expansion valve (8) reducing pressure by regulating flow; Described low-pressure low-temperature two-phase refrigerant gasifies after indoor heat exchanger (9) heat exchange, gets back to described compressor (1) through described cross valve (4) and gas-liquid separator (10).
3. the Defrost method of air conditioning multi-couple machine system according to claim 2, is characterized in that, in step s 4 which, described high-pressure liquid refrigerant is the state that the flow at high speed of setting cycle L and low speeds flow alternate.
4. the Defrost method of air conditioning multi-couple machine system according to claim 3, is characterized in that, described setting cycle L is 25 seconds, 30 seconds, 35 seconds or 40 seconds.
5. the Defrost method of air conditioning multi-couple machine system according to claim 3, is characterized in that, adjusts the numerical value of described setting cycle L according to the frost thickness on described outdoor heat exchanger (5) surface.
6. one kind for realize as arbitrary in claim 1 to 5 as described in the air conditioning multi-couple machine system of Defrost method, comprise the compressor (1) connected by pipeline, oil eliminator (2), cross valve (4), outdoor heat exchanger (5), indoor electronic expansion valve (8), indoor heat exchanger (9) and gas-liquid separator (10), it is characterized in that, pipeline between described outdoor heat exchanger (5) and indoor electronic expansion valve (8) is provided with current velocity controller (11), described current velocity controller (11) signal communication is to control device.
7. air conditioning multi-couple machine system according to claim 6, is characterized in that, described current velocity controller (11) comprises the expansion valve (6) and magnetic valve (7) that are in parallel; The high-pressure liquid refrigerant flowed out from described outdoor heat exchanger (5) when described magnetic valve (7) is opened through described magnetic valve (7) high velocity stream to described electric expansion valve (8), the high-pressure liquid refrigerant flowed out from described outdoor heat exchanger (5) when described magnetic valve (7) cuts out through described expansion valve (6) low-speed flow to described electric expansion valve (8).
8. the air conditioning multi-couple machine system according to claim 6 or 7, is characterized in that, has at least one frost thickness checkout gear in the arranged outside of described outdoor heat exchanger (5), and described frost thickness checkout gear signal communication is to control device.
9. the air conditioning multi-couple machine system according to claim 6 or 7, is characterized in that, the pipeline between described oil eliminator (2) and described cross valve (4) is provided with check valve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510955944.9A CN105509384B (en) | 2015-12-17 | 2015-12-17 | The Defrost method and air conditioning multi-couple machine system of air conditioning multi-couple machine system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510955944.9A CN105509384B (en) | 2015-12-17 | 2015-12-17 | The Defrost method and air conditioning multi-couple machine system of air conditioning multi-couple machine system |
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| CN105509384A true CN105509384A (en) | 2016-04-20 |
| CN105509384B CN105509384B (en) | 2017-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023450A (en) * | 2019-11-25 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Energy-saving defrosting control method and device, storage medium and air conditioner |
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| JPS63231154A (en) * | 1987-03-17 | 1988-09-27 | 中野冷機株式会社 | Refrigerator |
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| CN105509384B (en) | 2017-12-29 |
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