CN111520956A - Double-system refrigerator and defrosting control method thereof - Google Patents
Double-system refrigerator and defrosting control method thereof Download PDFInfo
- Publication number
- CN111520956A CN111520956A CN202010393219.8A CN202010393219A CN111520956A CN 111520956 A CN111520956 A CN 111520956A CN 202010393219 A CN202010393219 A CN 202010393219A CN 111520956 A CN111520956 A CN 111520956A
- Authority
- CN
- China
- Prior art keywords
- evaporator
- way valve
- defrosting
- compressor
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010257 thawing Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims description 22
- 230000009977 dual effect Effects 0.000 claims description 10
- 238000007710 freezing Methods 0.000 claims description 7
- 230000008014 freezing Effects 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000004891 communication Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
-
- 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
-
- 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
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/006—General constructional features for mounting refrigerating machinery components
-
- 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
Landscapes
- 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 invention discloses a dual-system refrigerator and a defrosting control method thereof. The double-system refrigerator comprises two evaporators connected in parallel, the two evaporators are controlled by a plurality of three-way valves to alternately provide cold energy for the refrigerator, when one of the evaporators meets defrosting conditions, the three-way valve controls the defrosting evaporator to be connected to a system high-pressure pipeline for defrosting operation, and the other evaporator supplies cold. The invention utilizes the high-temperature high-pressure refrigerant to defrost the evaporator, can reduce the running time of the defrosting heater, reduce the defrosting energy consumption and ensure that the heat exchange efficiency of the evaporator is not reduced.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a dual-system refrigerator and a defrosting control method thereof.
Background
At present, in the refrigerator industry, the defrosting of an air-cooled frost-free refrigerator generally uses a steel pipe heating wire, a quartz heater, an aluminum pipe heating wire and the like to layer frost on an evaporator into water by consuming electric energy for heating, and the water is discharged out of a box. The defrosting method using the heater generally operates the defrosting procedure when the surface of the evaporator is completely covered with a frost layer, and the heat exchange efficiency of the evaporator is low before defrosting, so that the system efficiency is reduced; the defrosting time is long, the energy consumption is large, and the defrosting energy consumption accounts for the specific energy consumption of the whole machine.
Chinese patent application CN102109259A discloses a defrosting method for double parallel fin heat exchangers of an air source heat pump unit. The defrosting control method comprises the following steps: when the ambient temperature and the inlet temperatures of the two heat exchangers are both lower than the set starting temperature, the unit starts reverse cycle defrosting; when the inlet temperatures of the two heat exchangers are both higher than the set exit temperature or exceed the set defrosting time, the reverse cycle defrosting is exited; if the inlet temperature of one of the heat exchangers does not reach the defrosting exit temperature all the time, and the inlet temperature of the other heat exchanger exceeds the defrosting exit temperature by more than 20 ℃, the unit also exits the reverse cycle defrosting. In the defrosting mode, two evaporators must enter or exit a defrosting procedure at the same time and cannot be independently controlled.
In conclusion, the existing refrigerator has the problems that the defrosting process is long in time consumption and high in energy consumption, and double evaporators cannot be independently controlled.
Disclosure of Invention
The invention provides a double-system refrigerator and a defrosting control method thereof, and aims to solve the technical problems that in the prior art, the defrosting process is long in time consumption and high in energy consumption, and double evaporators cannot be independently controlled.
The technical method adopted by the invention is that the double-system refrigerator comprises a compressor, a condenser, two evaporators connected in parallel and a plurality of three-way valves, wherein the three-way valves control the two evaporators to alternately provide cold energy for the refrigerator, when one of the evaporators meets the defrosting condition, the three-way valves control the defrosting evaporator to be connected into a system high-pressure pipeline for defrosting operation, and the other evaporator supplies cold.
In one embodiment, an outlet pipeline of the condenser is connected with an inlet of a first three-way valve, two branches are connected in parallel between an outlet of the first three-way valve and a suction side pipeline of the compressor, and the first branch is sequentially connected with a first throttling device, a second three-way valve, a first evaporator and a third three-way valve in series; the second branch is sequentially connected with a fourth three-way valve, a second throttling device and a second evaporator in series; a third interface of the second three-way valve is communicated with a second outlet pipeline of the fourth three-way valve through a pipeline; and a third interface of the third three-way valve is communicated with a first outlet of the fourth three-way valve through a pipeline.
When the first evaporator is defrosted, the second outlet of the first three-way valve is communicated with the inlet of the fourth three-way valve, the first outlet of the fourth three-way valve is communicated with the third interface of the third three-way valve, the first interface of the third three-way valve is communicated with the first evaporator, and the high-temperature refrigerant returns to the suction end of the compressor after passing through the third interface of the second three-way valve, the second throttling device and the second evaporator after defrosting the first evaporator.
When the first evaporator does not need defrosting, the second outlet of the first three-way valve is communicated with the second outlet of the fourth three-way valve, and the high-temperature refrigerant returns to the suction end of the compressor after passing through the second throttling device and the second evaporator.
When the first evaporator is used for cooling, the high-temperature refrigerant returns to the suction end of the compressor after passing through the first outlet of the first three-way valve, the first throttling device, the first evaporator of the second three-way valve and the third three-way valve.
Preferably, the three-way valve is a three-way solenoid valve.
Preferably, the first throttling means and the second throttling means employ capillaries.
Preferably, the first evaporator is provided in the freezing chamber, and the second evaporator is provided in the refrigerating chamber.
The invention also provides a defrosting control method of the double-system refrigerator, wherein the two evaporators alternately provide cold energy for the refrigerator, when one of the evaporators meets the defrosting condition, the three-way valve controls the defrosting evaporator to be connected to the high-pressure pipeline of the system for defrosting operation, and the other evaporator supplies cold.
In a specific embodiment, the defrosting control method includes:
step 20, introducing the high-temperature refrigerant into the first evaporator through the first three-way valve, the fourth three-way valve and the third three-way valve for defrosting, and then returning the high-temperature refrigerant to the air suction end of the compressor after passing through the second three-way valve, the second capillary tube and the second evaporator;
and 30, returning the high-temperature refrigerant to the suction end of the compressor after the high-temperature refrigerant passes through the first three-way valve, the fourth three-way valve, the second capillary tube and the second evaporator.
Compared with the prior art, the invention has the following beneficial effects:
the technical scheme provided by the invention utilizes the high-temperature high-pressure refrigerant to defrost the evaporator, so that the running time of a defrosting heater can be reduced, the defrosting energy consumption is reduced, and meanwhile, the heat exchange efficiency of the evaporator is not reduced.
Drawings
FIG. 1 is a system diagram of a dual system refrigerator according to the present invention;
FIG. 2 is a flow chart of the defrosting control method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are only for illustrating the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1, the dual system refrigerator includes a compressor 1, a condenser 2, and two evaporators connected in parallel, a first evaporator 9 for supplying cooling capacity to a freezing chamber, and a second evaporator 12 for supplying cooling capacity to a refrigerating chamber. The system also comprises a plurality of three-way valves, the three-way valves control the two evaporators to alternately provide cooling capacity for the refrigerator, when one evaporator meets defrosting conditions, the three-way valves control the defrosting evaporator to be connected to a high-pressure pipeline of the system for defrosting operation, and meanwhile, the other evaporator supplies cooling capacity.
In the embodiment shown in fig. 1, four three-way solenoid valves are included, the outlet pipeline of the condenser 2 is connected with the inlet 301 of the first three-way solenoid valve 3, two branches are connected in parallel between the outlet of the first three-way valve and the suction side pipeline of the compressor, and the first branch 13 is connected in series with the first throttling device 4, the second three-way solenoid valve 5, the first evaporator 9 and the third three-way solenoid valve 6 in sequence; the second branch 14 is connected in series with a fourth three-way solenoid valve 7, a second throttling device 10 and a second evaporator 12 in sequence. A third interface 503 of the second three-way electromagnetic valve is communicated with a second outlet 703 of the fourth three-way electromagnetic valve through a pipeline; the third port 603 of the third three-way solenoid valve is in communication with the first outlet 702 of the fourth three-way valve via a conduit. The first throttle 4 and the second throttle 10 each employ a capillary tube.
In the embodiment shown in fig. 1, the dual system refrigerator includes two evaporators respectively provided in a first compartment and a second compartment of a cabinet. The compressor 1 is arranged at the bottom of the box body and is provided with a high-pressure exhaust port and a low-pressure suction port. The condenser 2 can be arranged on the back or two side walls of the box body, and the inlet of the condenser is communicated with a high-pressure exhaust pipeline of the compressor. The first three-way solenoid valve 3 has an inlet 301, a first outlet 302 and a second outlet 303. The inlet 301 of the first three-way solenoid valve is communicated with the outlet of the condenser. The inlet of the first throttle device 4 communicates with the first outlet 302 of the first three-way solenoid valve. And the second three-way electromagnetic valve 5 is provided with three interfaces, a first interface 501 is connected with an inlet of a first evaporator 9, the first evaporator provides cooling capacity for the first chamber, a second interface 502 is communicated with an outlet of the first throttling device 4, and a third interface 503 is communicated with a second outlet 703 of the fourth three-way electromagnetic valve 7 through a pipeline. The first evaporator is provided with a first fan 8, and the first fan is matched with the first evaporator for use. And a third three-way solenoid valve 6 having three ports, a first port 601 communicating with one port of the first evaporator, and a second port 602 communicating with the compressor suction pipe. A first outlet 702 of the fourth three-way electromagnetic valve 7 is communicated with a third interface 603 of the third three-way electromagnetic valve, and an inlet 701 of the fourth three-way electromagnetic valve is communicated with a second outlet 303 of the first three-way electromagnetic valve; the inlet of the second throttling device 10 is simultaneously communicated with the second outlet 703 of the fourth three-way solenoid valve and the third interface 503 of the second three-way solenoid valve. A second evaporator 12, whose inlet is in communication with the outlet of the second throttling device 10 and whose outlet is in communication with the suction duct of the compressor, supplies the refrigeration to the second compartment. The second fan 11 is used in cooperation with the second evaporator.
The temperatures of the first evaporator and the second evaporator are independently controlled, and whether cooling is needed or not is judged according to the temperatures collected by the temperature sensors in the chambers. In this embodiment, the first compartment is a freezer compartment and the second compartment is a refrigerator compartment. If the refrigerating chamber has a cold supply requirement, the second evaporator supplies cold to the refrigerating chamber; if the freezing chamber has a cooling demand, the first evaporator supplies cooling to the freezing chamber; if the refrigerating chamber and the freezing chamber have cooling requirements at the same time, the second evaporator is preferentially used for cooling the refrigerating chamber, the first evaporator is used for cooling the freezing chamber after the temperature of the refrigerating chamber meets the requirement, and the first evaporator and the second evaporator are used for alternately cooling.
The defrosting control method comprises the following steps: during the period that one evaporator of the double-system refrigerator is used for cooling and the other evaporator is not used for cooling, the evaporator which does not need to be used for cooling is connected into a compressor discharge pipeline through the three-way valve, and high-pressure exhaust is utilized for defrosting the evaporator, so that the problem that the defrosting operation is carried out only when the frost layer on the surface of the evaporator is too thick is solved, and the heat exchange efficiency of the evaporator is improved.
As shown in fig. 2, the defrosting control method provided by the present invention includes:
step 20, introducing the high-temperature refrigerant into the first evaporator through the first three-way valve, the fourth three-way valve and the third three-way valve for defrosting, and then returning the high-temperature refrigerant to the air suction end of the compressor after passing through the second three-way valve, the second capillary tube and the second evaporator;
and 30, returning the high-temperature refrigerant to the suction end of the compressor after the high-temperature refrigerant passes through the first three-way valve, the fourth three-way valve, the second capillary tube and the second evaporator.
Whether the first evaporator needs to be defrosted or not is judged generally according to the defrosting end time when the last high-temperature refrigerant flows through the coil of the first evaporator, namely, the judgment is carried out according to a time interval, wherein the time interval is one compressor start-stop period, for example, the first compressor start-stop period needs to be defrosted, and the third compressor start-stop period needs to be defrosted.
The second evaporator supplies cold to the refrigerating chamber, the temperature of the evaporator is relatively high, most of the evaporator is condensed on the surface of the evaporator and does not frost, and liquid water is automatically discharged during condensation, so that defrosting is not generally needed.
And when the first evaporator reaches the defrosting end condition, the defrosting operation is quitted.
The condition for judging the end of defrosting is that defrosting is finished after the defrosting time reaches the rated time, for example, 15 minutes, or defrosting is finished after the temperature detected by the defrosting temperature sensor reaches the rated temperature.
In a specific embodiment, when the first evaporator 9 stops providing cooling capacity to the first compartment, it is determined whether the first evaporator needs to have a high-temperature refrigerant flowing through its coil pipe to defrost the first evaporator, and if so, the inlet 301 of the first three-way electromagnetic valve is controlled to be connected to the second outlet 303, the inlet 701 of the fourth three-way electromagnetic valve is connected to the first outlet 702, the first interface 601 of the third three-way electromagnetic valve is connected to the third interface 603, the first interface 501 of the second three-way electromagnetic valve is connected to the third interface 503, and then the first evaporator passes through the second throttling device and the second evaporator and returns to the compressor suction pipeline. The high temperature, high pressure liquid refrigerant in the system is passed entirely through the first evaporator coil to remove the frost layer produced during refrigeration in the first evaporator 9.
If the first evaporator does not need defrosting, the inlet 301 of the first three-way solenoid valve is connected with the second outlet 303, the inlet 701 of the fourth three-way solenoid valve is connected with the second outlet 703, and the refrigerant circulates through the second branch 14 to supply cold to the second evaporator.
When the first evaporator is used for cooling, the high-temperature refrigerant returns to the suction end of the compressor after passing through the first outlet 302 of the first three-way valve 3, the first throttling device 4, the second three-way valve 5, the first evaporator 9 and the third three-way valve 6.
Because the technical scheme of the invention is adopted on the parallel double-circulation system refrigerator, when one evaporator is used for cooling, the other evaporator is connected to the high-pressure end pipeline of the system through the four three-way electromagnetic valves, and the other evaporator is defrosted by using the high-temperature high-pressure refrigerant (usually 40 ℃), the running time of a defrosting heater can be reduced, and the defrosting energy consumption is reduced. In addition, each refrigeration cycle of one evaporator can realize defrosting of the other evaporator by the high-temperature liquid refrigerant, so that the thickening of a frost layer on the surface of the evaporator is inhibited to a great extent, and the heat exchange efficiency of the evaporator is not reduced.
The foregoing is considered as illustrative only of the embodiments of the invention. It should be understood that any modifications, equivalents and changes made within the spirit and framework of the inventive concept are intended to be included within the scope of the present invention.
Claims (10)
1. A double-system refrigerator comprises a compressor, a condenser and two evaporators connected in parallel, and is characterized by further comprising a plurality of three-way valves, wherein the three-way valves control the two evaporators to alternately provide cold energy for the refrigerator, when one of the evaporators meets a defrosting condition, the three-way valves control the defrosting evaporator to be connected to a compressor exhaust high-pressure pipeline for defrosting operation, and the other evaporator supplies cold.
2. The dual system refrigerator as claimed in claim 1, wherein an outlet line of the condenser is connected to an inlet of a first three-way valve, two branches are connected in parallel between an outlet of the first three-way valve and a suction side line of the compressor, and the first branch is connected in series with a first throttling means, a second three-way valve, a first evaporator and a third three-way valve in sequence; the second branch is sequentially connected with a fourth three-way valve, a second throttling device and a second evaporator in series; a third interface of the second three-way valve is communicated with a second outlet pipeline of the fourth three-way valve through a pipeline; and a third interface of the third three-way valve is communicated with a first outlet of the fourth three-way valve through a pipeline.
3. The dual system refrigerator as claimed in claim 2, wherein the second outlet (303) of the first three-way valve (3) is connected to the inlet (701) of the fourth three-way valve (7) when the first evaporator is defrosted, the first outlet (702) of the fourth three-way valve is connected to the third port (603) of the third three-way valve (6), the first port (601) of the third three-way valve is connected to the first evaporator (9), and the high temperature refrigerant returns to the suction side of the compressor after passing through the third port (503) of the second three-way valve (5), the second throttling means (10) and the second evaporator (12) after defrosting the first evaporator.
4. The dual system refrigerator as claimed in claim 2, wherein when the first evaporator does not require defrosting, the second outlet (303) of the first three-way valve (3) is communicated with the second outlet (703) of the fourth three-way valve (7), and the high temperature refrigerant is returned to the suction side of the compressor through the second throttling means (10) and the second evaporator (12).
5. The dual system refrigerator as claimed in claim 2, wherein the high temperature refrigerant discharged from the compressor is returned to the suction side of the compressor through the first outlet (302) of the first three-way valve (3), the first throttling means (7), the second three-way valve (5), the first evaporator (9) and the third three-way valve (6) while the first evaporator is cooling.
6. The dual system refrigerator as claimed in claim 1, wherein the three-way valve is a three-way solenoid valve.
7. The dual system refrigerator as claimed in claim 2, wherein the first throttle means and the second throttle means employ capillary tubes.
8. The dual system refrigerator as claimed in claim 2, wherein the first evaporator is provided in the freezing chamber, and the second evaporator is provided in the refrigerating chamber.
9. A defrosting control method for a double-system refrigerator as claimed in any one of claims 1 to 8, wherein two evaporators alternately supply cooling energy to the refrigerator, and when one of the evaporators meets the defrosting condition, the defrosting evaporator is controlled by a three-way valve to be connected to a high-pressure exhaust pipeline of a compressor for defrosting operation, and the other evaporator is supplied with cooling energy.
10. The defrosting control method according to claim 9, comprising:
step 10, when the second evaporator supplies cold and the first evaporator stops supplying cold, judging whether defrosting is needed to be carried out on the first evaporator; if yes, go to step 20, if no, go to step 30;
step 20, introducing the high-temperature refrigerant into the first evaporator through the first three-way valve, the fourth three-way valve and the third three-way valve for defrosting, and then returning the high-temperature refrigerant to the air suction end of the compressor after passing through the second three-way valve, the second capillary tube and the second evaporator;
and 30, returning the high-temperature refrigerant to the suction end of the compressor after the high-temperature refrigerant passes through the first three-way valve, the fourth three-way valve, the second capillary tube and the second evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010393219.8A CN111520956A (en) | 2020-05-11 | 2020-05-11 | Double-system refrigerator and defrosting control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010393219.8A CN111520956A (en) | 2020-05-11 | 2020-05-11 | Double-system refrigerator and defrosting control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111520956A true CN111520956A (en) | 2020-08-11 |
Family
ID=71906958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010393219.8A Pending CN111520956A (en) | 2020-05-11 | 2020-05-11 | Double-system refrigerator and defrosting control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111520956A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460903A (en) * | 2020-12-14 | 2021-03-09 | 珠海格力电器股份有限公司 | Refrigeration defrosting system and refrigeration equipment |
| CN112880218A (en) * | 2021-03-26 | 2021-06-01 | 珠海格力电器股份有限公司 | Refrigerator defrosting system, refrigerator and refrigerator defrosting method |
| CN115540406A (en) * | 2021-06-29 | 2022-12-30 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
| WO2023029777A1 (en) * | 2021-09-02 | 2023-03-09 | 青岛海尔电冰箱有限公司 | Refrigeration system for refrigerating and freezing device, and refrigerating and freezing device having same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100287961A1 (en) * | 2007-11-05 | 2010-11-18 | Gye Young Song | Refrigerator and control method for the same |
| CN108592498A (en) * | 2018-05-10 | 2018-09-28 | 西安交通大学 | For parallel circulating system of the dual temperature refrigerator with hot gas defrosting and cold recovery |
-
2020
- 2020-05-11 CN CN202010393219.8A patent/CN111520956A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100287961A1 (en) * | 2007-11-05 | 2010-11-18 | Gye Young Song | Refrigerator and control method for the same |
| CN108592498A (en) * | 2018-05-10 | 2018-09-28 | 西安交通大学 | For parallel circulating system of the dual temperature refrigerator with hot gas defrosting and cold recovery |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460903A (en) * | 2020-12-14 | 2021-03-09 | 珠海格力电器股份有限公司 | Refrigeration defrosting system and refrigeration equipment |
| CN112880218A (en) * | 2021-03-26 | 2021-06-01 | 珠海格力电器股份有限公司 | Refrigerator defrosting system, refrigerator and refrigerator defrosting method |
| CN115540406A (en) * | 2021-06-29 | 2022-12-30 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
| WO2023273708A1 (en) * | 2021-06-29 | 2023-01-05 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device, and refrigerating and freezing device |
| CN115540406B (en) * | 2021-06-29 | 2024-03-19 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
| WO2023029777A1 (en) * | 2021-09-02 | 2023-03-09 | 青岛海尔电冰箱有限公司 | Refrigeration system for refrigerating and freezing device, and refrigerating and freezing device having same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111520956A (en) | Double-system refrigerator and defrosting control method thereof | |
| CN109764607A (en) | The control method of refrigerator | |
| CN211823378U (en) | Refrigerator with a door | |
| CN111238155B (en) | Control and refrigeration method of three-temperature-zone dual-system refrigerator | |
| CN108106041A (en) | A kind of vehicle-mounted heat pump air conditioner with Gas-supplying enthalpy-increasing | |
| CN106225326A (en) | Heat exchanger, air conditioner outdoor unit, heat pump system, control method and air conditioner | |
| CN106123478A (en) | A kind of dual system controlling method for refrigerator, system and dual system refrigerator | |
| CN108759139B (en) | Primary throttling intermediate incomplete cooling refrigeration system with intermediate temperature evaporator | |
| CN214199278U (en) | Air source heat pump unit with fluorine pump defrosting function | |
| CN201463433U (en) | Hot air defroster for multi-set parallel evaporator refrigeration system | |
| CN2886463Y (en) | Defrosting apparatus for air-source heat pump water chiller-heater unit | |
| US11965683B2 (en) | Cooling system for low temperature storage | |
| CN209893748U (en) | Refrigerator with a door | |
| CN111121352A (en) | Continuous defrosting refrigeration control system capable of reducing heat leakage | |
| CN116294275A (en) | Refrigerating system with automatic defrosting function | |
| CN207716675U (en) | A kind of vehicle-mounted heat pump air conditioner | |
| CN216203955U (en) | Air conditioning system | |
| CN216384419U (en) | Four-pipe air-cooled cold and hot water unit | |
| CN113883800B (en) | Refrigeration and defrosting control method of double-system refrigeration refrigerator | |
| CN211233434U (en) | Showcase refrigeration system | |
| CN210663485U (en) | Thermal fluorination defrosting system for refrigerating system and refrigerating system | |
| CN113864929A (en) | Air conditioning system and control method thereof | |
| CN112460847A (en) | Air source heat pump unit with fluorine pump defrosting function and defrosting method thereof | |
| CN201122033Y (en) | Energy-saving refrigerating system | |
| CN111707028A (en) | Outdoor air-cooled defroster of heat pump air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200811 |