CN110173951A - The method of hot working fluid adverse current in liquid supply pipe is prevented when a kind of air-cooler defrosting - Google Patents
The method of hot working fluid adverse current in liquid supply pipe is prevented when a kind of air-cooler defrosting Download PDFInfo
- Publication number
- CN110173951A CN110173951A CN201910362423.0A CN201910362423A CN110173951A CN 110173951 A CN110173951 A CN 110173951A CN 201910362423 A CN201910362423 A CN 201910362423A CN 110173951 A CN110173951 A CN 110173951A
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- China
- Prior art keywords
- air
- cooler
- defrosting
- valve
- hot working
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Classifications
-
- 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
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
Abstract
The present invention provides a kind of method that hot working fluid adverse current in liquid supply pipe is prevented when air-cooler defrosting, when hot working medium defrosting, hot working fluid is not but not heating power expansion valve is crossed in reverse flow, and normally freeze when will not influence the refrigeration effect of air-cooler and the runnability of refrigeration system.The present invention adds pressure pipeline between liquid feeding pipeline and hot working medium defrosting pipeline, the junction of pressure pipeline and liquid feeding pipeline is between liquid supply electromagnetic valve and heating power expansion valve, the junction of pressure pipeline and hot working medium defrosting pipeline is between pneumatic filter and defrosting solenoid valve, the installation pressurization solenoid valve on pressure pipeline, substitute the check-valves of heating power expansion valve inlet side or outlet side in present engineering design, to improve the service life and job stability of heating power expansion valve, the refrigeration effect of air-cooler and the runnability of refrigeration system are improved.
Description
Technical field
The present invention relates to a kind of methods for preventing hot working fluid adverse current in liquid supply pipe when air-cooler defrosting, are used for Cold Chain Logistics
In freezer.
Background technique
In present Cold Chain Logistics industry, due to the advantages that cooling blower structure is compact, cooling rate is fast, air-cooler is wide
It is general to apply in Cold Chain Logistics freezer, as shown in the Chinese patent application No. is 201220124094.X.When air-cooler fin
When the temperature of outer surface is lower than 0 DEG C, air-cooler heat-transfer pipe and fin outer surface will frosting, form thermal resistance, cause refrigeration system
Coefficient of energy dissipation increase.In large and medium-sized low-temperature cold store system, hot working medium defrosting be compare frequently with a kind of defrosting mode, heat
When working medium defrosting, to prevent hot working fluid, reverse flow is by heating power expansion valve in feed liquid pipeline, generally in heating power expansion valve
Check-valves is arranged in inlet side or outlet side.Such as in the inlet side setting check-valves of heating power expansion valve, hot working medium defrosting, hot working fluid
Heating power expansion valve is crossed in meeting reverse flow, influences the job stability and service life of heating power expansion valve；Such as going out in heating power expansion valve
Mouthful side is arranged check-valves, when hot working medium defrosting, hot working fluid will not reverse flow cross heating power expansion valve, but when air-cooler normally freezes,
The check-valves of heating power expansion valve outlet side is set, the resistance damage of two fluid refrigerants flowed out from heating power expansion valve can be increased
It loses, so that the flow of refrigerant can be reduced, and will increase the content of gas in refrigerant liquid, seriously affect the system of air-cooler
The runnability of cold effect and refrigeration system.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of reasonable cold wind of design
The method that hot working fluid adverse current in liquid supply pipe is prevented when machine defrosting, when hot working medium defrosting, hot working fluid is not but not reverse flow overheats
Power expansion valve, and normally freeze when will not influence the refrigeration effect of air-cooler and the runnability of refrigeration system.
Technical solution used by the present invention solves the above problems is: preventing hot working fluid in feed flow when a kind of air-cooler defrosting
The method of adverse current in pipe, be provided on the liquid feeding pipeline being connected with air-cooler and high pressure receiver outlet tube liquid supply electromagnetic valve and
Heating power expansion valve, be provided on the hot working medium defrosting pipeline being connected with air-cooler and oil eliminator escape pipe pneumatic filter,
Defrosting solenoid valve and defrosting check valve, be provided with back on air-cooler and the return line being connected with gas-liquid separator air inlet pipe
Pneumoelectric magnet valve is provided with drain overflow valve in the drain line being connected with return line and drain bucket inlet tube；
It is characterized by: adding pressure pipeline, pressure pipeline and liquid feeding pipeline between liquid feeding pipeline and hot working medium defrosting pipeline
Junction between liquid supply electromagnetic valve and heating power expansion valve, the junction of pressure pipeline and hot working medium defrosting pipeline is located at gas
Between body filter and defrosting solenoid valve；The installation pressurization solenoid valve on pressure pipeline；
Air-cooler operational process: when air-cooler normally freezes, defrosting solenoid valve and pressurization solenoid valve are closed, defrosting check valve and row
Liquid overflow valve is closed, and liquid supply electromagnetic valve and return-air solenoid valve are opened, and heating power expansion valve relies on the return-air degree of superheat of air-cooler outlet
Automatically adjust the size of refrigerant flow；From high pressure receiver outlet tube flow out refrigerant liquid by liquid feeding pipeline successively into
Enter liquid supply electromagnetic valve, heating power expansion valve, subsequently into air-cooler, the refrigerant liquid of the low-temp low-pressure after throttling is in air-cooler
Heat boiling is absorbed in coil pipe and is vaporizated into refrigerant gas, is entered return line from air-cooler outflow, is then passed through return-air electromagnetism
Enter gas-liquid separator after valve, the flowing of the circulating phase-change in air-cooler of refrigerant in cycles reaches refrigeration effect；
Hot working medium defrosting discharge opeing process: full frost layer is tied in air-cooler operation a period of time, the heat-transfer pipe of air-cooler and fin outer surface,
When needing defrosting, it is first shut off liquid supply electromagnetic valve, air-cooler continues to run a period of time, successively closes the blower of air-cooler and returns
Then pneumoelectric magnet valve opens pressurization solenoid valve, so that the entrance of heating power expansion valve is had defrosting pressure, be delayed after a period of time,
Defrosting solenoid valve is opened again, and the high temperature hot working fluid gas flowed out from oil eliminator escape pipe sequentially enters pneumatic filter, defrosting
Solenoid valve, defrosting check valve, subsequently into air-cooler, in air-cooler, high temperature hot working fluid gas and the frost outside coil pipe in coil pipe
Heat exchange, frost absorb heat and are melted into after water outside through defrosting drainpipe delivery chamber, become after the hot working fluid gas heat release of high temperature
Refrigerant liquid enters return line from air-cooler outflow and enters drain bucket through drain overflow valve subsequently into drain line；
Air-cooler process of refrigerastion again: after hot working medium defrosting drain continues for some time, defrosting solenoid valve, pressurization electricity are successively closed
Magnet valve opens return-air solenoid valve and starts the blower of air-cooler after a period of time, then opens liquid supply electromagnetic valve, refrigerant
Successively pass through liquid supply electromagnetic valve, heating power expansion valve, air-cooler, return-air valve, in air-cooler, refrigerant liquid absorbs in cold
Heat restarts to freeze, and achievees the purpose that cold cooling.
When the present invention needs defrosting, air-cooler is continued to run 5~10 minutes after closing liquid supply electromagnetic valve.
After the entrance of heating power expansion valve of the present invention has defrosting pressure, it is delayed 3~10 seconds, then open defrosting solenoid valve.
After hot working medium defrosting drain of the present invention continues 20~30 minutes, defrosting solenoid valve, pressurization solenoid valve are successively closed.
The present invention by 3~after five minutes, start the blower of air-cooler.
Compared with prior art, the present invention having the following advantages that and effect: utilizing increased pressure pipeline and pressurization electromagnetism
Valve substitutes the check-valves of heating power expansion valve inlet side or outlet side on liquid feeding pipeline, and heating power expansion valve can be improved uses the longevity
Life and job stability, improve the refrigeration effect of air-cooler and the runnability of refrigeration system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Referring to Fig. 1, the method that when a kind of air-cooler defrosting prevents hot working fluid adverse current in liquid supply pipe, with air-cooler 1 and
Be provided with liquid supply electromagnetic valve 5 and heating power expansion valve 6 on the connected liquid feeding pipeline 10 of high pressure receiver outlet tube, with air-cooler 1
Pneumatic filter 3, defrosting solenoid valve 2 and defrosting list are provided on the hot working medium defrosting pipeline 11 being connected with oil eliminator escape pipe
To valve 7, be provided with return-air solenoid valve 9 in the return line 13 being connected with air-cooler 1 and gas-liquid separator air inlet pipe, with return
Drain overflow valve 8 is provided in the drain line 14 that air pipe 13 is connected with drain bucket inlet tube；In liquid feeding pipeline 10 and thermal technology
Pressure pipeline 12 is added between matter defrosting pipeline 11, pressure pipeline 12 and the junction of liquid feeding pipeline 10 are located at liquid supply electromagnetic valve 5
Between heating power expansion valve 6, the junction of pressure pipeline 12 and hot working medium defrosting pipeline 11 is located at pneumatic filter 3 and defrosting electricity
Between magnet valve 2, the pressurization solenoid valve 4 of automatic control effect is installed on pressure pipeline 12, has substituted heat in present engineering design
The check-valves of 6 inlet side of power expansion valve or outlet side is improved with improving the service life and job stability of heating power expansion valve 6
The refrigeration effect of air-cooler 1 and the runnability of refrigeration system.
Air-cooler operational process: when air-cooler 1 normally freezes, defrosting solenoid valve 2, pressurization solenoid valve 4 are closed by electric signal
It closes, defrosting check valve 7, drain overflow valve 8 are closed by pressure difference, and liquid supply electromagnetic valve 5, return-air solenoid valve 9 rely on electric signal successively
It opens, the size for the return-air degree of superheat automatic adjustment refrigerant flow that heating power expansion valve 6 is exported by air-cooler 1；It is store from high pressure
The refrigerant liquid of liquid device outlet tube outflow sequentially enters liquid supply electromagnetic valve 5, heating power expansion valve 6 by liquid feeding pipeline 10, then
Into air-cooler 1, the refrigerant liquid of the low-temp low-pressure after throttling absorbs heat boiling in the coil pipe of air-cooler 1 and is vaporizated into system
Refrigerant gas enters return line 13 from the outflow of air-cooler 1, then by entering gas-liquid separator, refrigeration after return-air solenoid valve 9
The flowing of the circulating phase-change in air-cooler 1 of agent in cycles, reaches refrigeration effect.
Hot working medium defrosting discharge opeing process: the operation a period of time of air-cooler 1,1 heat-transfer pipe of air-cooler and fin outer surface knot are full
Frost layer when needing defrosting, is first shut off liquid supply electromagnetic valve 5 by electric signal, air-cooler 1 is continued to run 5~10 minutes, successively closed
Close air-cooler blower and return-air solenoid valve 9；Then pressurization solenoid valve 4 is opened by electric signal, makes the entrance of heating power expansion valve 6
With defrosting pressure, after delay 3~10 seconds, defrosting solenoid valve 2 is opened by electric signal, from the branch pipe of oil eliminator escape pipe
The high temperature hot working fluid gas of (hot working medium defrosting pipe) outflow, sequentially enters pneumatic filter 3, defrosting solenoid valve 2, defrosting check valve
7, subsequently into air-cooler 1, in air-cooler 1, high temperature hot working fluid gas is exchanged with the white heat outside coil pipe in coil pipe, and frost absorbs
Heat is melted into after water outside through defrosting drainpipe delivery chamber, becomes refrigerant liquid after the hot working fluid gas heat release of high temperature, from cold
The outflow of blower 1 enters return line 13, subsequently into drain line 14, enters drain bucket through drain overflow valve 8.
Air-cooler process of refrigerastion again: it after hot working medium defrosting drain continues 20~30 minutes, is successively closed by electric signal
Defrosting solenoid valve 2, pressurization solenoid valve 4, opening return-air solenoid valve 9,3~after five minutes, start the blower of air-cooler 1, then relies on
Electric signal opens liquid supply electromagnetic valve 5, and refrigerant successively passes through liquid supply electromagnetic valve 5, heating power expansion valve 6, air-cooler 1, return-air valve 9,
In air-cooler 1, refrigerant liquid absorbs the heat in cold, restarts to freeze, and achievees the purpose that cold cooling.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different, and above content is only to structure of the invention example explanation described in this specification.It is all according to
According to equivalence changes or simple change that the invention patent design structure, feature and principle is done, it is included in this hair
In the protection scope of bright patent.Those skilled in the art can do described specific embodiment various
The mode that the modify or supplement or adopt of various kinds is similar substitutes, and without departing from structure of the invention or surmounts present claims
Range defined in book, is within the scope of protection of the invention.
Claims (5)
1. a kind of method for preventing hot working fluid adverse current in liquid supply pipe when air-cooler defrosting goes out with air-cooler and high pressure receiver
Be provided with liquid supply electromagnetic valve and heating power expansion valve on the connected liquid feeding pipeline of liquid pipe, with air-cooler and oil eliminator escape pipe phase
Be provided with pneumatic filter, defrosting solenoid valve and defrosting check valve on hot working medium defrosting pipeline even, with air-cooler and gentle
It is provided with return-air solenoid valve in the connected return line of liquid/gas separator air inlet pipe, is connected with return line and drain bucket inlet tube
Drain line on be provided with drain overflow valve；
It is characterized by: adding pressure pipeline, pressure pipeline and liquid feeding pipeline between liquid feeding pipeline and hot working medium defrosting pipeline
Junction between liquid supply electromagnetic valve and heating power expansion valve, the junction of pressure pipeline and hot working medium defrosting pipeline is located at gas
Between body filter and defrosting solenoid valve；The installation pressurization solenoid valve on pressure pipeline；
Air-cooler operational process: when air-cooler normally freezes, defrosting solenoid valve and pressurization solenoid valve are closed, defrosting check valve and row
Liquid overflow valve is closed, and liquid supply electromagnetic valve and return-air solenoid valve are opened, and heating power expansion valve relies on the return-air degree of superheat of air-cooler outlet
Automatically adjust the size of refrigerant flow；From high pressure receiver outlet tube flow out refrigerant liquid by liquid feeding pipeline successively into
Enter liquid supply electromagnetic valve, heating power expansion valve, subsequently into air-cooler, the refrigerant liquid of the low-temp low-pressure after throttling is in air-cooler
Heat boiling is absorbed in coil pipe and is vaporizated into refrigerant gas, is entered return line from air-cooler outflow, is then passed through return-air electromagnetism
Enter gas-liquid separator after valve, the flowing of the circulating phase-change in air-cooler of refrigerant in cycles reaches refrigeration effect；
Hot working medium defrosting discharge opeing process: full frost layer is tied in air-cooler operation a period of time, the heat-transfer pipe of air-cooler and fin outer surface,
When needing defrosting, it is first shut off liquid supply electromagnetic valve, air-cooler continues to run a period of time, successively closes the blower of air-cooler and returns
Then pneumoelectric magnet valve opens pressurization solenoid valve, so that the entrance of heating power expansion valve is had defrosting pressure, be delayed after a period of time,
Defrosting solenoid valve is opened again, and the high temperature hot working fluid gas flowed out from oil eliminator escape pipe sequentially enters pneumatic filter, defrosting
Solenoid valve, defrosting check valve, subsequently into air-cooler, in air-cooler, high temperature hot working fluid gas and the frost outside coil pipe in coil pipe
Heat exchange, frost absorb heat and are melted into after water outside through defrosting drainpipe delivery chamber, become after the hot working fluid gas heat release of high temperature
Refrigerant liquid enters return line from air-cooler outflow and enters drain bucket through drain overflow valve subsequently into drain line；
Air-cooler process of refrigerastion again: after hot working medium defrosting drain continues for some time, defrosting solenoid valve, pressurization electricity are successively closed
Magnet valve opens return-air solenoid valve and starts the blower of air-cooler after a period of time, then opens liquid supply electromagnetic valve, refrigerant
Successively pass through liquid supply electromagnetic valve, heating power expansion valve, air-cooler, return-air valve, in air-cooler, refrigerant liquid absorbs in cold
Heat restarts to freeze, and achievees the purpose that cold cooling.
2. the method for preventing hot working fluid adverse current in liquid supply pipe when air-cooler defrosting according to claim 1, feature exist
In: when needing defrosting, air-cooler is continued to run 5~10 minutes after closing liquid supply electromagnetic valve.
3. the method for preventing hot working fluid adverse current in liquid supply pipe when air-cooler defrosting according to claim 1, feature exist
In: after the entrance of heating power expansion valve has defrosting pressure, it is delayed 3~10 seconds, then open defrosting solenoid valve.
4. the method for preventing hot working fluid adverse current in liquid supply pipe when air-cooler defrosting according to claim 1, feature exist
In: after hot working medium defrosting drain continues 20~30 minutes, successively close defrosting solenoid valve, pressurization solenoid valve.
5. the method for preventing hot working fluid adverse current in liquid supply pipe when air-cooler defrosting according to claim 1, feature exist
In: by 3~after five minutes, start the blower of air-cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910362423.0A CN110173951B (en) | 2019-04-30 | 2019-04-30 | Method for preventing hot working medium from flowing reversely in liquid supply pipe during defrosting of air cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910362423.0A CN110173951B (en) | 2019-04-30 | 2019-04-30 | Method for preventing hot working medium from flowing reversely in liquid supply pipe during defrosting of air cooler |
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| Publication Number | Publication Date |
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| CN110173951A true CN110173951A (en) | 2019-08-27 |
| CN110173951B CN110173951B (en) | 2021-01-19 |
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| CN201910362423.0A Active CN110173951B (en) | 2019-04-30 | 2019-04-30 | Method for preventing hot working medium from flowing reversely in liquid supply pipe during defrosting of air cooler |
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|---|---|---|---|---|
| JPH10103823A (en) * | 1996-09-30 | 1998-04-24 | Sanyo Electric Co Ltd | Icemaker |
| CN201926210U (en) * | 2011-01-07 | 2011-08-10 | 吴家伟 | Evaporator capable of realizing refrigerating and hot working medium defrosting simultaneously |
| CN203501573U (en) * | 2013-07-29 | 2014-03-26 | 广东省广弘食品集团有限公司 | Refrigeration system with hot-fluorine defrosting function |
| CN204254947U (en) * | 2014-10-31 | 2015-04-08 | 合肥美的暖通设备有限公司 | Air-conditioning system |
| CN204438647U (en) * | 2015-01-16 | 2015-07-01 | 上海盈翔制冷设备有限公司 | A kind of hot Freon defrosting system |
| CN204648783U (en) * | 2015-05-11 | 2015-09-16 | 浙江商业职业技术学院 | With the hot fluorine defrosting device of heat exchange gas-liquid separator |
| CN106369859A (en) * | 2016-10-31 | 2017-02-01 | 天津大学 | Multifunctional high-precision constant-temperature and constant-humidity control freezing and refrigerating system |
| CN205980492U (en) * | 2016-08-29 | 2017-02-22 | 烟台欧森纳地源空调股份有限公司 | Defrosting system |
| CN206739692U (en) * | 2016-11-01 | 2017-12-12 | 安徽美乐柯制冷空调设备有限公司 | A kind of defrosting and refrigeration system and freezer |
| CN206959398U (en) * | 2017-02-10 | 2018-02-02 | 济南大森制冷设备有限公司 | A kind of straight swollen refrigeration system with automatic hot air defrosting valve group |
| CN207907559U (en) * | 2018-01-16 | 2018-09-25 | 济南百福特制冷设备有限公司 | New and effective hot Freon defrosting system |
-
2019
- 2019-04-30 CN CN201910362423.0A patent/CN110173951B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10103823A (en) * | 1996-09-30 | 1998-04-24 | Sanyo Electric Co Ltd | Icemaker |
| CN201926210U (en) * | 2011-01-07 | 2011-08-10 | 吴家伟 | Evaporator capable of realizing refrigerating and hot working medium defrosting simultaneously |
| CN203501573U (en) * | 2013-07-29 | 2014-03-26 | 广东省广弘食品集团有限公司 | Refrigeration system with hot-fluorine defrosting function |
| CN204254947U (en) * | 2014-10-31 | 2015-04-08 | 合肥美的暖通设备有限公司 | Air-conditioning system |
| CN204438647U (en) * | 2015-01-16 | 2015-07-01 | 上海盈翔制冷设备有限公司 | A kind of hot Freon defrosting system |
| CN204648783U (en) * | 2015-05-11 | 2015-09-16 | 浙江商业职业技术学院 | With the hot fluorine defrosting device of heat exchange gas-liquid separator |
| CN205980492U (en) * | 2016-08-29 | 2017-02-22 | 烟台欧森纳地源空调股份有限公司 | Defrosting system |
| CN106369859A (en) * | 2016-10-31 | 2017-02-01 | 天津大学 | Multifunctional high-precision constant-temperature and constant-humidity control freezing and refrigerating system |
| CN206739692U (en) * | 2016-11-01 | 2017-12-12 | 安徽美乐柯制冷空调设备有限公司 | A kind of defrosting and refrigeration system and freezer |
| CN206959398U (en) * | 2017-02-10 | 2018-02-02 | 济南大森制冷设备有限公司 | A kind of straight swollen refrigeration system with automatic hot air defrosting valve group |
| CN207907559U (en) * | 2018-01-16 | 2018-09-25 | 济南百福特制冷设备有限公司 | New and effective hot Freon defrosting system |
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| Publication number | Publication date |
|---|---|
| CN110173951B (en) | 2021-01-19 |
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