CN109387018A - Refrigeration equipment and its defrosting control method with automatic defrosting system - Google Patents
Refrigeration equipment and its defrosting control method with automatic defrosting system Download PDFInfo
- Publication number
- CN109387018A CN109387018A CN201710662322.6A CN201710662322A CN109387018A CN 109387018 A CN109387018 A CN 109387018A CN 201710662322 A CN201710662322 A CN 201710662322A CN 109387018 A CN109387018 A CN 109387018A
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- evaporator
- capillary
- defrosting
- compressor
- operating condition
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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
- F25D21/002—Defroster control
- F25D21/004—Control mechanisms
-
- 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
- F25B47/022—Defrosting cycles hot gas defrosting
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
Abstract
The present invention provides a kind of refrigeration equipment and its defrosting control method with automatic defrosting system.Refrigeration equipment includes cabinet body, refrigerating circuit and controller, air duct and Temperature Humidity Sensor are additionally provided in cabinet body, refrigerating circuit includes compressor, condenser, throttling set and evaporator, evaporator includes the first evaporator and the second evaporator, throttling set includes the first capillary and the second capillary, first capillary is connect with the first evaporator, second capillary is connect with the second evaporator, condenser is connect with the first capillary and the second capillary respectively by triple valve, and the outlet of the second capillary is connected by the import of solenoid valve and condenser；Air duct is additionally provided with blower, inlet damper and export the breeze door；It further include vacuum subassembly, vacuum subassembly includes the vacuum pump, air accumulator and electrically-controlled valve to link together, and vacuum pump and electrically-controlled valve are respectively communicated with air duct.It realizes automatic defrosting and reduces energy consumption to improve user experience.
Description
Technical field
The present invention relates to a kind of Refrigeration Technique is another, more particularly to a kind of refrigeration equipment with automatic defrosting system and
Its defrosting control method.
Background technique
Small commercial horizontal refrigerator has white refrigerator at present, and evaporation coil is wrapped in refrigerator inner wall, refrigerator refrigerating operaton
When cool down by Effect of Nature Convection to loads such as internal foods.Since frequent switch gate and door seal are poorly sealed
When, damp and hot steam can enter that cabinet is intracorporal in environment, while the steam in the load such as food also will be distributed to cabinet it is intracorporal in,
Therefore refrigerator inner wall will appear frosting situation in use for some time, be will increase in evaporation coil and refrigerator when frosting is blocked up
Thermal resistance between air, hinders the heat exchange of evaporator surface, to reduce refrigerating efficiency, influences refrigeration effect, compressor
The time of operation also can accordingly extend and then increase power consumption, therefore refrigerator will timely defrost.Refrigerator commonly defrosts at present
Mode is that armstrong's patent defrosting such as ice scraper/cork roots out frost, and such method needs to empty food etc. in refrigerator and loads, time-consuming to take
Power may be damaged liner or refrigeration pipeline and be not easy cleared；Meanwhile manually the defrosting opportunity judgement of Defrost method is deposited
In very big subjectivity, without exact defrosting decision condition；It is too thick that defrosting will cause frosting too late, defrosting time it is longer and
It is not easy cleared；Defrosting too early will cause defrosting it is excessively frequent, to reduce energy utilization rate.How a kind of automatic defrosting is designed simultaneously
It is the technical problems to be solved by the invention that energy consumption, which is reduced, with the refrigeration equipment for improving user experience.
Summary of the invention
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a kind of refrigeration with automatic defrosting system
Equipment and its defrosting control method automatic defrosting and can reduce energy consumption to improve user experience.
A kind of refrigeration equipment with automatic defrosting system provided by the invention, including cabinet body, refrigerating circuit and controller,
Air duct and Temperature Humidity Sensor are additionally provided in the cabinet body, the refrigerating circuit includes the compressor to link together, condensation
Device, throttling set and evaporator, which is characterized in that the evaporator includes the first evaporator and the second evaporator, the throttling
Device includes the first capillary and the second capillary, and first capillary is connect with first evaporator, and described second mao
Tubule is connect with second evaporator, the condenser by triple valve respectively with first capillary and second mao described
The outlet of tubule connection, second capillary is connect by solenoid valve with the import of the condenser；First evaporator
It is arranged in the cabinet body, second evaporator is arranged in the air duct；The air duct is additionally provided with blower, inlet damper
And export the breeze door；The refrigeration equipment with automatic defrosting system further includes vacuum subassembly, and the vacuum subassembly includes connection
Vacuum pump, air accumulator and electrically-controlled valve together, the vacuum pump and the electrically-controlled valve are respectively communicated with the air duct；The compression
Machine, triple valve, blower, solenoid valve, Temperature Humidity Sensor, inlet damper, export the breeze door, vacuum pump, electrically-controlled valve respectively with it is described
Controller connection.
Further, be provided with device for drying and filtering between the triple valve and the condenser, the compressor with it is described
Fluid reservoir is provided between evaporator.
Further, check valve is also connected between the outlet and the fluid reservoir of second evaporator.
Further, the length of second capillary is greater than the length of first capillary.
Further, the compressor, condenser, triple valve, the first capillary, the first evaporator are successively linked in sequence structure
At cooling condition circuit；
The compressor, condenser, triple valve, the second capillary, the second evaporator, which are successively linked in sequence to constitute, collects white operating condition time
Road；
The compressor, solenoid valve, the second evaporator, which are successively linked in sequence, constitutes defrosting operating condition circuit.
Further, the air duct, vacuum pump, air accumulator, electrically-controlled valve, which are constituted, collects white operating condition vacuum loop.
Further, the bottom in the air duct is provided with switchable drainpipe, is provided with water receiver on the compressor,
The drainpipe connects the water receiver.
The present invention also provides a kind of defrosting control method of refrigeration equipment, the refrigeration equipment using it is above-mentioned have remove automatically
The refrigeration equipment of white function；
Defrosting control method includes the following steps:
Step 1, when Temperature Humidity Sensor detects cabinet intracorporal 1 > of relative humidity φ setting relative humidity φ 2, execute step
4；
Step 2, when Temperature Humidity Sensor detects the intracorporal 1≤φ 2 of relative humidity φ of cabinet, execute step 3；
Step 3, when Temperature Humidity Sensor detects the intracorporal temperature T1 > set temperature T2 of cabinet, then carry out cooling condition fortune
Row, refrigerant flow in the cooling condition circuit that compressor, condenser, triple valve, the first capillary and the first evaporator are formed；
And when detecting T1≤T2, execute step 4；
Step 4 carries out collecting white operating condition operation, and refrigerant is in compressor, condenser, triple valve, the second capillary and the second evaporator
It is flowed in the collection frost operating condition circuit of formation, controller starts the time t1 that accumulation collects white operating condition operation；
Step 5 sets defrosting cycle t2's when controller detects that total run time t1 of the compressor in the case where collecting white operating condition reaches
When integral multiple, reach defrosting operating condition condition, executes step 6；The whole of defrosting cycle t2 is set when controller detects that t1 is not up to
When several times, then return step 1；
Step 6 carries out defrosting operating condition operation, and refrigerant is in the defrosting operating condition circuit that compressor, solenoid valve and the second evaporator are formed
Middle flowing, controller starts to accumulate defrosting operating condition runing time t3, until t3 >=setting end period t4 terminates at defrosting operating condition
Reason.
Refrigeration equipment and its defrosting control method provided by the invention with automatic defrosting system, by using vacuum pump
Air duct is vacuumized, so as to effectively guide the steam in refrigerator to condense in the second evaporator surface, alleviates the first steaming
The frosting of device surface, that is, refrigerator inner wall is sent out, the heat exchange efficiency and refrigeration effect of the first evaporator are improved, it is intracorporal based on cabinet
The detection parameters of temperature and humidity realize automatic defrosting, cold when need not take out the load such as food in refrigerator during defrosting, and defrost
Cabinet is without powering off, and collecting also can be to refrigerator refrigeration to ensure that the refrigeration effect during defrosting, in fact when white operating condition is run
It now reduces energy consumption and improves user experience.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structure principle chart for the refrigeration equipment that the present invention has automatic defrosting system.
Fig. 2 is the partial structurtes schematic diagram for the refrigeration equipment that the present invention has automatic defrosting system.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the following, refrigeration equipment involved in embodiments of the present invention is described in detail based on attached drawing.
As shown in Figure 1, the present embodiment has the refrigeration equipment of automatic defrosting system, including cabinet body (unmarked), freeze back
Road and controller 13 are additionally provided with air duct 15 and Temperature Humidity Sensor 13 in cabinet body, and refrigerating circuit includes compressor 1, condenser
2, throttling set, evaporator and accessory such as device for drying and filtering 3 and gas-liquid separator 11 etc., evaporator include the first steaming
Device 7 and the second evaporator 8 are sent out, throttling set includes the first capillary 5 and the second capillary 6, the first capillary 5 and the second capillary
Pipe 6 connects condenser 2 by triple valve 4, and the first evaporator 7 connects the first capillary 5, the second evaporator 8 connects second mao
Tubule 6, first capillary 5 concatenated with the first evaporator 7 after pipeline, with the second capillary 6 and the second evaporator 8, single
Pipeline after concatenating to valve 10 is in parallel relationship, which is connected between triple valve 4 and gas-liquid separator 11；Described
One evaporator 7 is wrapped on the liner of cabinet body, and second evaporator 8 is that the air duct in cabinet body is arranged in fin-tube heat exchanger
In 15；The solenoid valve 12 is connected between the import of gas exhaust piping and the second evaporator 8 of compressor 1；The vacuum pump 18
It is connect with air duct 15, the air accumulator 19 is connected between the outlet of vacuum pump 18 and electrically-controlled valve 20；The electrically-controlled valve 20 and air duct
15 connection forming circuits.The Temperature Humidity Sensor 13 is arranged in inside refrigerator；The compressor 1, triple valve 4, blower 9, electricity
Magnet valve 12, Temperature Humidity Sensor 13, inlet damper 16, export the breeze door 17, vacuum pump 18, air accumulator 19, electrically-controlled valve 20 with control
Device 14 processed connects, and the controller 14 has the function of timer.
Specifically, the present embodiment has the refrigeration equipment of automatic defrosting system different according to refrigerant flow path, have
Various working mode, the compressor 1, condenser 2, device for drying and filtering 3, triple valve 4, the first capillary 5, the first evaporator 7,
Gas-liquid separator 11, which is successively linked in sequence, constitutes cooling condition circuit；The compressor 1, condenser 2, device for drying and filtering 3, threeway
Valve 4, the second capillary 6, the second evaporator 8, check valve 10, gas-liquid separator 11, which is successively linked in sequence to constitute, collects white operating condition time
Road；The compressor 1, solenoid valve 12, the second evaporator 8, check valve 10, gas-liquid separator 11 are successively linked in sequence to constitute and remove
White operating condition low-temperature circuit.In addition, inlet damper 16, air duct 15, export the breeze door 17, vacuum pump 18, air accumulator 19,20 structure of electrically-controlled valve
Cheng Jishuan operating condition vacuum loop.
Under normal circumstances refrigeration equipment start to work after, firstly, Temperature Humidity Sensor 13 to the intracorporal relative humidity of cabinet into
Row detection switches to the white operating condition operation of collection if meeting the white working condition of collection.In the case where collecting white operating condition, blower 9, vacuum pump are closed
18, inlet damper 16 and export the breeze door 17, start compressor 1, refrigerant through the second capillary 6 flow into the second evaporator 8, second
The length of capillary 6 is greater than the length of the first hollow billet 5, refrigerant throttle degree it is big thus evaporating temperature in the second evaporator 8
It is low, low temperature is formed in air duct 15；Then, start vacuum pump 18, close electrically-controlled valve 20, air duct 15 is vacuumized, steam is low
It sublimates and frosts on 8 surface of the second evaporator in the environment of warm vacuum；Then, vacuum pump 18 is closed, electrically-controlled valve 20 is opened, releases
Dry gas balance 15 air pressure of air duct is put, then opens inlet damper 16 and export the breeze door 17, starting blower 9 drives inside air duct 15
Dry air is swapped with the intracorporal air of cabinet；The white purpose of collection can be reached on the second evaporator 8 by repeating the above steps,
Frost layer is formed on the first 7 surfaces of evaporator, that is, cabinet body inner wall to reduce.The white operating condition of collection runs full to relative humidity in cabinet body
When sufficient preset value, Temperature Humidity Sensor 13 detects the intracorporal temperature of cabinet, if meeting cooling condition condition, controller 14 is sent out
Instruction is switched to cooling condition circuit out.Under cooling condition, refrigerant flows through cooling condition circuit, steams in the first evaporator 7
Hair generates cooling capacity and cools down to loads such as foods；When cooling condition is run, 4 pairs of the controller total run times collected under white operating condition
Determined, decides whether to be switched to defrosting operating condition circuit.Under defrosting operating condition, the high temperature refrigerant that compressor 1 is discharged is through electricity
The frost layer that magnet valve 12 is directly entered heat exchanging device outside wall surface in the heat exchanger tube of the second evaporator 8 carries out defrost, and blower 9 is at this time
Shutdown status, defrosting water are flowed into through drainpipe in the drip tray 22 on 1 top of compressor, and the waste heat using compressor 1 makes defrosting water
Evaporation；Under defrosting operating condition, blower 9, vacuum pump 18, inlet damper 16 and export the breeze door 17 are also at closed state, avoid wind
Cause temperature fluctuation excessive in hot gas leakage to cabinet body 1 in road 15.
Further, as shown in Fig. 2, second evaporator 8, blower 9 are vertically disposed in air duct 15, inlet damper 16
It is arranged in the top in air duct 15, export the breeze door 17 is arranged in the lower part in air duct 15, which, which is arranged in cabinet body, is located at pressure storehouse
Top, vacuum pump 18 and compressor 1 are arranged side by side in the pressure storehouse of cabinet body lower part, and air accumulator 19 and electrically-controlled valve 20 hang over cabinet body vertically
The back side.
The present invention also provides a kind of defrosting control method of refrigeration equipment, the refrigeration equipment using it is above-mentioned have remove automatically
The refrigeration equipment of white function；
Defrosting control method includes the following steps:
Step 1, when Temperature Humidity Sensor detects cabinet intracorporal 1 > of relative humidity φ setting relative humidity φ 2, execute step
4；
Step 2, when Temperature Humidity Sensor detects the intracorporal 1≤φ 2 of relative humidity φ of cabinet, execute step 3；
Step 3, when Temperature Humidity Sensor detects the intracorporal temperature T1 > set temperature T2 of cabinet, then carry out cooling condition fortune
Row, refrigerant flow in the cooling condition circuit that compressor, condenser, triple valve, the first capillary and the first evaporator are formed；
And when detecting T1≤T2, execute step 4；
Step 4 carries out collecting white operating condition operation, and refrigerant is in compressor, condenser, triple valve, the second capillary and the second evaporator
It is flowed in the collection frost operating condition circuit of formation, controller starts the time t1 that accumulation collects white operating condition operation；
Step 5 sets defrosting cycle t2's when controller detects that total run time t1 of the compressor in the case where collecting white operating condition reaches
When integral multiple, reach defrosting operating condition condition, executes step 6；The whole of defrosting cycle t2 is set when controller detects that t1 is not up to
When several times, then return step 1；
Step 6 carries out defrosting operating condition operation, and refrigerant is in the defrosting operating condition circuit that compressor, solenoid valve and the second evaporator are formed
Middle flowing, controller starts to accumulate defrosting operating condition runing time t3, until t3 >=setting end period t4 terminates at defrosting operating condition
Reason.
Wherein, coherent reference, which can according to need, is set, preferred value are as follows: φ 2 is setting relative humidity 40 ~ 60%；T2
For set temperature -35 ~ -10 DEG C；T2 is setting time 0.5 ~ 30 day；T4 is 10 ~ 100min of setting time.
Refrigeration equipment and its defrosting control method provided by the invention with automatic defrosting system, by using vacuum pump
Air duct is vacuumized, so as to effectively guide the steam in refrigerator to condense in the second evaporator surface, alleviates the first steaming
The frosting of device surface, that is, refrigerator inner wall is sent out, the heat exchange efficiency and refrigeration effect of the first evaporator are improved, it is intracorporal based on cabinet
The detection parameters of temperature and humidity realize automatic defrosting, cold when need not take out the load such as food in refrigerator during defrosting, and defrost
Cabinet is without powering off, and collecting also can be to refrigerator refrigeration to ensure that the refrigeration effect during defrosting, in fact when white operating condition is run
It now reduces energy consumption and improves user experience.
Claims (8)
1. a kind of refrigeration equipment with automatic defrosting system, including cabinet body, refrigerating circuit and controller, also set in the cabinet body
It is equipped with air duct and Temperature Humidity Sensor, the refrigerating circuit includes the compressor to link together, condenser, throttling set and steaming
Send out device, which is characterized in that the evaporator includes the first evaporator and the second evaporator, and the throttling set includes the first capillary
Pipe and the second capillary, first capillary are connect with first evaporator, and second capillary and described second steams
Device connection is sent out, the condenser is connect respectively by triple valve with first capillary and second capillary, and described the
The outlet of two capillaries is connect by solenoid valve with the import of the condenser；First evaporator is arranged in the cabinet body
In, second evaporator is arranged in the air duct；The air duct is additionally provided with blower, inlet damper and export the breeze door；Institute
Stating the refrigeration equipment with automatic defrosting system further includes vacuum subassembly, and the vacuum subassembly includes the vacuum to link together
Pump, air accumulator and electrically-controlled valve, the vacuum pump and the electrically-controlled valve are respectively communicated with the air duct；The compressor, triple valve, wind
Mechanical, electrical magnet valve, Temperature Humidity Sensor, inlet damper, export the breeze door, vacuum pump, electrically-controlled valve are connect with the controller respectively.
2. the refrigeration equipment according to claim 1 with automatic defrosting system, which is characterized in that the triple valve and institute
It states and is provided with device for drying and filtering between condenser, be provided with fluid reservoir between the compressor and the evaporator.
3. the refrigeration equipment according to claim 2 with automatic defrosting system, which is characterized in that second evaporator
Outlet and the fluid reservoir between be also connected with check valve.
4. the refrigeration equipment according to claim 1 with automatic defrosting system, which is characterized in that second capillary
Length be greater than first capillary length.
5. the refrigeration equipment according to claim 1 with automatic defrosting system, which is characterized in that the compressor, cold
Condenser, triple valve, the first capillary, the first evaporator, which are successively linked in sequence, constitutes cooling condition circuit；
The compressor, condenser, triple valve, the second capillary, the second evaporator, which are successively linked in sequence to constitute, collects white operating condition time
Road；
The compressor, solenoid valve, the second evaporator, which are successively linked in sequence, constitutes defrosting operating condition circuit.
6. the refrigeration equipment according to claim 1 with automatic defrosting system, which is characterized in that the air duct, vacuum
Pump, air accumulator, electrically-controlled valve, which are constituted, collects white operating condition vacuum loop.
7. the refrigeration equipment according to claim 1 with automatic defrosting system, which is characterized in that the bottom in the air duct
It is provided with switchable drainpipe, water receiver is provided on the compressor, the drainpipe connects the water receiver.
8. a kind of defrosting control method of refrigeration equipment, which is characterized in that the refrigeration equipment is used as claim 1-7 is any
The refrigeration equipment with automatic defrosting system；
Defrosting control method includes the following steps:
Step 1, when Temperature Humidity Sensor detects cabinet intracorporal 1 > of relative humidity φ setting relative humidity φ 2, execute step
4；
Step 2, when Temperature Humidity Sensor detects the intracorporal 1≤φ 2 of relative humidity φ of cabinet, execute step 3；
Step 3, when Temperature Humidity Sensor detects the intracorporal temperature T1 > set temperature T2 of cabinet, then carry out cooling condition fortune
Row, refrigerant flow in the cooling condition circuit that compressor, condenser, triple valve, the first capillary and the first evaporator are formed；
And when detecting T1≤T2, execute step 4；
Step 4 carries out collecting white operating condition operation, and refrigerant is in compressor, condenser, triple valve, the second capillary and the second evaporator
It is flowed in the collection frost operating condition circuit of formation, controller starts the time t1 that accumulation collects white operating condition operation；
Step 5 sets defrosting cycle t2's when controller detects that total run time t1 of the compressor in the case where collecting white operating condition reaches
When integral multiple, reach defrosting operating condition condition, executes step 6；The whole of defrosting cycle t2 is set when controller detects that t1 is not up to
When several times, then return step 1；
Step 6 carries out defrosting operating condition operation, and refrigerant is in the defrosting operating condition circuit that compressor, solenoid valve and the second evaporator are formed
Middle flowing, controller starts to accumulate defrosting operating condition runing time t3, until t3 >=setting end period t4 terminates at defrosting operating condition
Reason.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710662322.6A CN109387018B (en) | 2017-08-04 | 2017-08-04 | Refrigeration equipment with automatic defrosting function and defrosting control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710662322.6A CN109387018B (en) | 2017-08-04 | 2017-08-04 | Refrigeration equipment with automatic defrosting function and defrosting control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109387018A true CN109387018A (en) | 2019-02-26 |
| CN109387018B CN109387018B (en) | 2020-12-15 |
Family
ID=65412530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710662322.6A Active CN109387018B (en) | 2017-08-04 | 2017-08-04 | Refrigeration equipment with automatic defrosting function and defrosting control method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN109387018B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285619A (en) * | 2019-06-28 | 2019-09-27 | 中国科学院理化技术研究所 | Cascade type heat pump control method and system |
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|---|---|---|---|---|
| JPH109727A (en) * | 1996-06-24 | 1998-01-16 | Mitsubishi Heavy Ind Ltd | Freezer |
| CN2352909Y (en) * | 1998-08-28 | 1999-12-08 | 张祯儒 | Freezing type drying machine |
| KR100276512B1 (en) * | 1998-09-29 | 2000-12-15 | 전주범 | De-frost period control method of a refregerator |
| KR20000028518A (en) * | 1998-10-31 | 2000-05-25 | 전주범 | Method of controlling defrosting in refrigerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110285619A (en) * | 2019-06-28 | 2019-09-27 | 中国科学院理化技术研究所 | Cascade type heat pump control method and system |
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| Publication number | Publication date |
|---|---|
| CN109387018B (en) | 2020-12-15 |
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