CN115325754B - Defrosting control method and system for refrigeration house - Google Patents
Defrosting control method and system for refrigeration house Download PDFInfo
- Publication number
- CN115325754B CN115325754B CN202210957534.8A CN202210957534A CN115325754B CN 115325754 B CN115325754 B CN 115325754B CN 202210957534 A CN202210957534 A CN 202210957534A CN 115325754 B CN115325754 B CN 115325754B
- Authority
- CN
- China
- Prior art keywords
- defrosting
- amount
- evaporator
- frost
- refrigerator
- 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.)
- Active
Links
- 238000010257 thawing Methods 0.000 title claims abstract description 189
- 238000005057 refrigeration Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- F25D13/00—Stationary devices, e.g. cold-rooms
-
- 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
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a defrosting control method and system for a refrigeration house, wherein the method comprises the following steps: calculating the frost amount on the evaporator according to the reduced value of the moisture content of the air in the refrigeration house and the condensate water displacement of the evaporator; and starting defrosting when the quantity of the frost on the evaporator is larger than or equal to the set defrosting starting condition value. By adopting the technical scheme of the invention, the defrosting effect of the refrigeration house can be improved, and the energy consumption can be reduced.
Description
Technical Field
The invention relates to the field of refrigeration, in particular to a defrosting control method and system for a refrigeration house.
Background
The refrigerator is easy to frost due to the high humidity and low temperature, so that the refrigerating effect is affected. The refrigerator with high humidity usually frosts for 1-2 hours, but the refrigerator with low humidity needs defrosting interval time which is far longer than 2 hours, and the existing refrigerator can not be used commonly according to time and temperature judging defrosting in-out conditions, and has the defects of long pre-sale debugging period and unclean defrosting or electricity waste.
Disclosure of Invention
The invention aims at solving the technical problems of low defrosting energy efficiency and unclean defrosting of a refrigeration house in the prior art, and provides a refrigeration house defrosting control method and system.
The embodiment of the invention provides a defrosting control method for a refrigeration house, which comprises the following steps:
calculating the frost amount on the evaporator according to the reduced value of the moisture content of the air in the refrigeration house and the condensate water displacement of the evaporator;
and starting defrosting when the quantity of the frost on the evaporator is larger than or equal to the set defrosting starting condition value.
In the embodiment of the invention, the frost amount H on the evaporator is calculated as follows:
H＝Vcs-Vs,
wherein Vcs is the moisture content reduction value of the air in the refrigerator, and Vs is the condensate water displacement of the evaporator.
In the embodiment of the invention, the moisture content of the air in the refrigeration house is calculated according to the temperature, the humidity and the space size of the refrigeration house.
In the embodiment of the invention, after defrosting is started, if the amount of frost on the evaporator is smaller than or equal to a set defrosting exit condition value and the drainage amount of condensed water in the defrosting period is larger than the set minimum drainage amount of defrosting, defrosting is exited.
In the embodiment of the invention, if the amount of the frost on the evaporator is smaller than or equal to the set defrosting exit condition value and the drainage amount of the condensed water is larger than the set minimum drainage amount of the defrosting in a plurality of continuous defrosting periods, the minimum drainage amount of the defrosting is increased.
In the embodiment of the invention, after defrosting is started, if the amount of the frost on the evaporator is larger than the set defrosting exit condition value and the condensate water drainage amount is not changed after reaching a certain value, defrosting is exited after the defrosting is continued for a set time, and the defrosting exit condition value is improved.
In the embodiment of the invention, after defrosting is started, if the amount of frost on the evaporator is smaller than or equal to a set defrosting exit condition value, the drainage amount of condensed water in the defrosting period is smaller than or equal to a set minimum drainage amount of defrosting and is continuously increased, defrosting is exited, and the defrosting exit condition value is reduced.
In the embodiment of the invention, after defrosting is started, if the amount of frost on the evaporator is smaller than or equal to the set defrosting exit condition value, the drainage amount of condensed water in the defrosting period is smaller than or equal to the set minimum drainage amount of defrosting and is kept unchanged, after defrosting is continued for a set time, defrosting is exited, and the set minimum drainage amount of defrosting is reduced.
In the embodiment of the invention, after defrosting is started, if the defrosting time reaches the set maximum defrosting time, defrosting is stopped until the quantity of the frost on the evaporator reaches half of the defrosting starting condition value, and defrosting is restarted.
In the embodiment of the invention, if the door opening time of the refrigeration house exceeds the set time, the frost amount on the evaporator is corrected:
H’＝H+Vhs，
wherein H' is the frost amount after correction, H is the frost amount before correction, vhs is the difference of the moisture content of the air in the refrigerator after opening the door minus the moisture content of the air in the refrigerator before opening the door, and the value of Vhs is zero when the difference is smaller than zero.
In the embodiment of the invention, if the opening time of the refrigeration house does not exceed the set time and the refrigeration house is opened for the first time in one defrosting period, the defrosting starting condition value is reduced according to the set proportion, and if the refrigeration house is not opened for the first time, the defrosting starting condition value is kept unchanged.
The embodiment of the invention also provides a defrosting control system for the refrigeration house, which is characterized in that the defrosting control method for the refrigeration house is adopted when the defrosting control is carried out on the refrigeration house.
Compared with the prior art, the defrosting control method for the refrigeration house calculates the frost amount on the evaporator according to the variation value of the moisture content of the air in the refrigeration house and the condensate water drainage amount of the evaporator, judges whether to start defrosting by calculating the frost amount on the evaporator in the refrigeration process, judges whether to exit defrosting by the frost amount on the evaporator and the water amount of defrosting in the defrosting process, and realizes dynamic control on starting defrosting and exiting defrosting, so that defrosting can be started or exited according to the actual situation of the refrigeration house, and the method is power-saving and energy-saving and is suitable for various refrigeration houses.
Drawings
Fig. 1 is a flowchart of a method for controlling defrosting of a refrigerator according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a refrigerator according to an embodiment of the present invention.
FIG. 3 is a flow chart of an abnormal exit of defrosting under defrosting according to an embodiment of the invention.
Fig. 4 is a flowchart of adjusting defrosting control parameters after a cold store is opened in an embodiment of the invention.
Detailed Description
The invention provides a defrosting control method for a refrigeration house, which is used for judging whether to start defrosting by calculating the quantity of frost on an evaporator in the refrigeration process and judging whether to exit defrosting by the quantity of frost on the evaporator and the quantity of water for defrosting in the defrosting process, so that the dynamic control of starting defrosting and exiting defrosting is realized.
Specifically, as shown in fig. 1, the method for controlling defrosting of a refrigerator provided by the embodiment of the invention comprises steps S1 to S5. The following description will be given separately.
Step S1: and starting refrigeration and calculating the frost quantity H on the evaporator.
In the refrigerating process, because the temperature of the evaporator is lower than zero, the water vapor in the air of the refrigeration house is frozen on the evaporator to generate frosting phenomenon, and the water vapor which is not frozen becomes condensed water and is discharged through the evaporator drain pipe. Therefore, the amount of frost on the evaporator can be calculated by the difference between the variation of the moisture content of the air in the refrigerator and the condensate displacement of the evaporator during the cooling process. Specifically, the amount of frost H on the evaporator is calculated as follows:
H＝Vcs-Vs,
wherein Vcs is the moisture content reduction value of the air in the refrigerator, and Vs is the condensate water displacement of the evaporator.
When the frost amount H on the evaporator is calculated, the value of the decrease in the moisture content of the refrigerator air is the current time of the decrease in the moisture content of the refrigerator air at the time of starting the cooling. The humidity of the air in the cold storage is calculated according to the temperature and humidity of the cold storage and the space size of the cold storage, and the temperature influences the humidity calculation, so that the temperature is required to be measured when the humidity of the air in the cold storage is calculated, the relative humidity is calculated according to the temperature and the humidity, and then the humidity of the air in the cold storage is calculated according to the space size of the cold storage. The evaporator condensate displacement is the displacement of the evaporator drain at the current time of start-up refrigeration, and is measured by a flowmeter provided in the evaporator drain.
As shown in fig. 2, a plurality of humidity sensors 2 are provided at different positions of the refrigerator 1, and the air humidity of the refrigerator is calculated from the average humidity of the plurality of humidity sensors 2; in addition, a flowmeter 4 is provided in the evaporator drain pipe 3 to detect the flow rate of condensed water in the evaporator 5.
Step S2: when the amount H of the frost on the evaporator is larger than the set defrosting start condition value Hh, defrosting is started.
If the amount of frost on the evaporator is large, the heat exchange and refrigeration effect of the evaporator is affected, and defrosting operation is required. Therefore, a defrosting start condition value Hh may be set, and when the amount of frost H on the evaporator is greater than the set defrosting start condition value Hh, defrosting is started, that is, the temperature of the evaporator is raised to be higher than zero, so that the frost on the evaporator is melted.
Step S3: after the defrosting is started, the condensate water displacement Vs during defrosting is recorded, and the amount of frost H on the evaporator is calculated.
It should be noted that, after defrosting is started, the calculation mode of the frost amount on the evaporator is the same as the calculation mode in the refrigeration process, and will not be described here again.
Step S4: and if the frost quantity H on the evaporator is smaller than or equal to a set defrosting exit condition value Ht and the condensed water drainage quantity Vs is larger than a set defrosting minimum drainage quantity Vs1, defrosting is exited.
In the defrosting process, condensed water, namely water obtained after the evaporator frosts and melts and water condensed by water vapor in the air, at the moment, the condensed water drainage amount and the frost amount on the evaporator need to be judged, if the frost amount on the evaporator is smaller than or equal to a set defrosting exit condition value and the condensed water drainage amount in the defrosting period is larger than a set defrosting minimum drainage amount, the defrosting is finished, and then refrigeration is started.
The period from the start of defrosting to the completion of defrosting was 1 defrosting cycle. If the amount of frost on the evaporator is less than or equal to the set defrosting exit condition value and the condensed water drain amount Vs is greater than the set defrosting minimum drain amount Vs1 in a plurality of consecutive defrosting cycles, it is indicated that the defrosting minimum drain amount Vs1 may be set too low and the defrosting minimum drain amount Vs1 is increased. The number of the continuous defrosting cycles can be 3 or 4 or 5, and the specific number is set according to actual needs, so that the invention is not limited.
Step S5: if the amount of frost and the drainage amount of condensed water on the evaporator can not meet the condition of defrosting exit in the step S4, the abnormal situation is indicated, defrosting exit is needed, and defrosting exit parameters are corrected.
As shown in fig. 3, there are several abnormal cases as follows:
first case: after starting defrosting, if the quantity H of the frost on the evaporator is larger than a set defrosting exit condition value Ht and the condensate water drainage quantity Vs is not changed after reaching a certain value, defrosting is continued for a set time, and the defrosting exit condition value Ht is increased, so that the defrosting exit condition value Ht can be increased by a specific value, and a certain proportion can be also increased. The setting time for continuing defrosting can be 5 minutes or 10 minutes, and is determined according to practical situations.
Second case: after starting defrosting, if the amount of frost H on the evaporator is smaller than or equal to a set defrosting exit condition value Ht, and the condensed water drainage amount Vs is smaller than or equal to a set defrosting minimum drainage amount Vs1 and is continuously increasing, defrosting is exited, and the defrosting exit condition value Ht is reduced, which can be set to reduce the defrosting exit condition value Ht by a specific value or a certain proportion.
Third case: after starting defrosting, if the frost quantity H on the evaporator is smaller than or equal to a set defrosting exit condition value Ht, and the condensed water drainage quantity Vs is smaller than or equal to a set defrosting minimum drainage quantity Vs1 and is unchanged, after continuing defrosting for a set time, defrosting is exited, and the set defrosting minimum drainage quantity Vs1 is reduced.
Fourth case: after starting defrosting, if the defrosting time reaches the set maximum defrosting time, defrosting is stopped until the quantity H of the frost on the evaporator reaches half of a defrosting starting condition value Hh, and defrosting is restarted.
In addition, because there may be a case where the door is opened to carry goods during the cooling or defrosting process, at this time, outside air may enter the refrigerator, and the moisture content in the refrigerator may be changed, so that the calculation of the frost amount H on the evaporator may be inaccurate, and at this time, the frost amount H on the evaporator and the defrosting start condition value Hh need to be corrected. Specifically, as shown in fig. 4, in the embodiment of the present invention, if the door opening time of the refrigerator exceeds a certain time (for example, 1 minute), the amount of frost on the evaporator is corrected:
H’＝H+Vhs，
wherein H' is the frost amount after correction, H is the frost amount before correction, vhs is the difference of the moisture content of the air in the refrigerator after opening the door minus the moisture content of the air in the refrigerator before opening the door, and the value of Vhs is zero when the difference is smaller than zero.
If the door opening time of the refrigerator does not exceed a certain time and the door is opened for the first time in one defrosting period, reducing the defrosting starting condition value Hh according to a set proportion, for example, reducing Hh to 90% of the original value; if the door is not opened for the first time, the defrosting starting condition value is kept unchanged.
Further, in the embodiment of the invention, a defrosting control system for a refrigeration house is also provided, which is characterized in that the defrosting control method for the refrigeration house is adopted when the defrosting control is carried out on the refrigeration house.
In summary, by adopting the refrigeration house defrosting control method, the frost amount on the evaporator is calculated according to the variation value of the moisture content of the air in the refrigeration house and the condensate water drainage amount of the evaporator, whether defrosting is started or not is judged by calculating the frost amount on the evaporator in the refrigeration process, whether defrosting is stopped or not is judged by the frost amount on the evaporator and the defrosting water amount in the defrosting process, so that dynamic control on starting defrosting and stopping defrosting is realized, defrosting can be started or stopped according to the actual situation of the refrigeration house, and the refrigeration house defrosting control method is power-saving and energy-saving and is suitable for various refrigeration houses.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The defrosting control method for the refrigerator is characterized by comprising the following steps of:
calculating the frost amount on the evaporator according to the reduced value of the moisture content of the air in the refrigeration house and the condensate water displacement of the evaporator;
when the amount of the frost on the evaporator is larger than or equal to a set defrosting starting condition value, defrosting is started;
after defrosting is started, if the amount of the frost on the evaporator is larger than a set defrosting exit condition value and the condensate water drainage amount is not changed after reaching a certain value, defrosting is continued for a set time, and the defrosting exit condition value is improved.
2. The defrosting control method for a refrigerator according to claim 1, wherein the amount of frost H on the evaporator is calculated as follows:
H= Vcs- Vs；
wherein Vcs is the moisture content reduction value of the air in the refrigerator, and Vs is the condensate water displacement of the evaporator.
3. The defrosting control method for a refrigerator according to claim 2, wherein the moisture content of air in the refrigerator is calculated based on the temperature, humidity and space size of the refrigerator.
4. The method of controlling defrosting of claim 1, wherein the minimum defrosting displacement is increased if the amount of frost on the evaporator is less than or equal to a set defrosting exit condition value and the amount of condensed water displacement is greater than the set minimum defrosting displacement for a plurality of consecutive defrosting cycles.
5. The method of controlling defrosting of a refrigerator according to claim 1, wherein after starting defrosting, if the amount of frost on the evaporator is less than or equal to a set defrosting exit condition value, the amount of condensed water drain during defrosting is less than or equal to a set minimum amount of drain of defrosting and is also increasing continuously, defrosting is exited, and the defrosting exit condition value is lowered.
6. The method of controlling defrosting of a refrigerator according to claim 1, wherein after starting defrosting, if the amount of frost on the evaporator is less than or equal to a set defrosting exit condition value, the drainage amount of condensed water during defrosting is less than or equal to a set defrosting minimum drainage amount and remains unchanged, defrosting is exited after continuing defrosting for a set time, and the set defrosting minimum drainage amount is reduced.
7. The method of controlling defrosting of a refrigerator according to claim 1, wherein after starting defrosting, if the defrosting time reaches a set maximum defrosting time, defrosting is exited until the amount of defrosting on the evaporator reaches half of a defrosting starting condition value, and defrosting is restarted.
8. The method for controlling defrosting of a refrigerator according to claim 1, wherein if the door opening time of the refrigerator exceeds a set time, the amount of frost on the evaporator is corrected:
H’=H+Vhs，
wherein H' is the frost amount after correction, H is the frost amount before correction, vhs is the difference of the moisture content of the air in the refrigerator after opening the door minus the moisture content of the air in the refrigerator before opening the door, and the value of Vhs is zero when the difference is smaller than zero.
9. The method of controlling defrosting of a refrigerator according to claim 1, wherein if the opening time of the refrigerator does not exceed a set time and is the first opening time in one defrosting cycle, the defrosting start condition value is reduced according to a set ratio, and if it is not the first opening time, the defrosting start condition value is kept unchanged.
10. A defrosting control system for a refrigeration house, wherein the defrosting control method for the refrigeration house according to any one of claims 1 to 9 is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210957534.8A CN115325754B (en) | 2022-08-10 | 2022-08-10 | Defrosting control method and system for refrigeration house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210957534.8A CN115325754B (en) | 2022-08-10 | 2022-08-10 | Defrosting control method and system for refrigeration house |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115325754A CN115325754A (en) | 2022-11-11 |
| CN115325754B true CN115325754B (en) | 2023-09-05 |
Family
ID=83920824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210957534.8A Active CN115325754B (en) | 2022-08-10 | 2022-08-10 | Defrosting control method and system for refrigeration house |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115325754B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1916490A1 (en) * | 2006-10-16 | 2008-04-30 | Wurm GmbH & Co. KG Elektronische Systeme | Thawing control method |
| CN108917282A (en) * | 2018-05-18 | 2018-11-30 | 山东科技大学 | A kind of defrosting control device and method of refrigerating display case |
-
2022
- 2022-08-10 CN CN202210957534.8A patent/CN115325754B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1916490A1 (en) * | 2006-10-16 | 2008-04-30 | Wurm GmbH & Co. KG Elektronische Systeme | Thawing control method |
| CN108917282A (en) * | 2018-05-18 | 2018-11-30 | 山东科技大学 | A kind of defrosting control device and method of refrigerating display case |
Non-Patent Citations (1)
| Title |
|---|
| 刘午平等.空调器修理从入门到精通.国防工业出版社,2003,113. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115325754A (en) | 2022-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113124623B (en) | Defrosting control method and device for refrigeration equipment and condensing unit | |
| CN112781273B (en) | Defrosting control method for heat pump system and heat pump system | |
| CN112283993B (en) | Refrigeration control method and device and refrigeration equipment | |
| CN107120796B (en) | Defrosting control method for air conditioner | |
| CN113959062B (en) | Air conditioner defrosting control method and device and air conditioner | |
| CN115095954B (en) | Air conditioner and defrosting control method thereof | |
| CN112032941A (en) | Control method of air conditioner | |
| JPH08226682A (en) | Ice thermal storage type cooler | |
| CN110579069B (en) | Self-adaptive defrosting control method and device | |
| CN112781289A (en) | Low-temperature heat pump defrosting control method, device, equipment and storage medium | |
| CN111412581B (en) | Defrosting control method for air conditioner | |
| CN115325754B (en) | Defrosting control method and system for refrigeration house | |
| CN115095956B (en) | Air conditioner and defrosting control method thereof | |
| WO2022174842A1 (en) | Air conditioner and defrosting control method therefor | |
| CN115900223A (en) | Control method, control device, refrigeration equipment and computer readable storage medium | |
| CN115183401A (en) | Air conditioner and defrosting control method thereof | |
| CN101694340A (en) | Method for judging starting point of defrosting and refrigerating system for intelligent defrosting | |
| CN115031353A (en) | Air conditioner and defrosting control method thereof | |
| CN114413416A (en) | Multi-split air conditioner defrosting control method, storage medium and multi-split air conditioner | |
| CN114251896A (en) | Refrigerator and defrosting control method thereof | |
| JP3066147B2 (en) | Showcase defrost control method | |
| CN112665122A (en) | Ice storage control method and device and ice storage air conditioner | |
| CN111578603A (en) | Defrosting control method | |
| CN112344623B (en) | Defrosting control method and device for refrigerator evaporator and refrigerator | |
| CN219014747U (en) | Refrigerating unit and refrigerating equipment |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |