CN103363761A - Frostless refrigerator with circulation wind defrosting function and control method thereof - Google Patents
Frostless refrigerator with circulation wind defrosting function and control method thereof Download PDFInfo
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- CN103363761A CN103363761A CN201310288438XA CN201310288438A CN103363761A CN 103363761 A CN103363761 A CN 103363761A CN 201310288438X A CN201310288438X A CN 201310288438XA CN 201310288438 A CN201310288438 A CN 201310288438A CN 103363761 A CN103363761 A CN 103363761A
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Abstract
The invention relates to the technical field of refrigerators in the electrical appliances, in particular to a frostless refrigerator with a circulation wind defrosting function and a control method thereof. The frostless refrigerator with the circulation wind defrosting function comprises a cold chamber, a cold chamber temperature sensor arranged on the side wall of the cold chamber, a fan motor arranged at the back of the cold chamber, an evaporator arranged at the bottom of the fan motor, a defrosting temperature sensor arranged on an air inlet tube at the top of the evaporator, and a cold chamber return air inlet at the bottom of the evaporator, wherein a defrosting heater is arranged between the bottom of the evaporator and the cold chamber return air inlet; a cold air supply inlet is formed in the back of the cold chamber; a display used for adjusting temperature is arranged on a refrigerator door body. Through utilizing the temperature difference between the evaporator and the cold chamber when the refrigerator stops working, the residue cold of the evaporator can be utilized to refrigerate the cold chamber; high-temperature air in the cold chamber can be utilized to defrost the evaporator.
Description
Technical field
The present invention relates to the refrigerator technical field in the electric equipment, more specifically, relate to a kind of band circulated air defrost frost-free refrigerator-freezer and control method thereof.
Background technology
For band circulated air defrost frost-free refrigerator-freezer, the chamber lowers the temperature the fan electromotor that generally refers to refrigerator between refrigeration, the function such as freezing except the cold air forced circulation that in the compressor for refrigeration refrigeration evaporimeter is produced reaches.The fan electromotor that also is refrigerator utilizes the high-temperature gas of refrigerating chamber in compressor shutdown, scrub the frost layer on the evaporimeter.So have multi-functional for band circulated air defrost frostless electric frost: one, be generally [2 ℃ ~ 8 ℃] because of the temperature of refrigerating chamber; and the temperature of the evaporimeter of refrigerator in the time of compressor shutdown is generally below 0 ℃; utilize the high-temperature gas of refrigerator chamber, can defrost to evaporimeter.The temperature of the temperature of evaporimeter and refrigerator chamber is poor when two, utilizing refrigerator to shut down, and can utilize the remaining cold of evaporimeter to be freezed in the refrigerator chamber.Three, utilize the circulated air defrost to add the defrost of electric heater, defrost has duplicate protection, has strengthened the reliability of refrigerator function.But in the prior art,
If 1 has adopted the circulation defrost, but with the fixed temperature of evaporimeter, for example: when the temperature of evaporimeter is about 3 ℃ ~ 5 ℃, the blower fan of circulation defrost just quits work.If the temperature that refrigeration is regulated is 2 ℃, exist the temperature requirement of refrigerating chamber also lower than the temperature requirement of evaporimeter, the circulation defrost just cannot effectively utilize the remaining cold of evaporimeter to be freezed in a chamber, and the temperature of possible refrigerating chamber is difficult to reach.Limited the adjustable range of temperature of refrigerating chamber.
If 2 power that blower fan consumption is not set in the circulation defrost process with utilize the cold border equalization point that freezes more than the evaporimeter, the power that may cause fan operation to consume will be greater than the next refrigeration of cold belt more than the evaporimeter, cause power consumption to increase, be difficult to produce a desired effect.
3 if air-cooled refrigerated cabinet, and the convenience in control may adopt one or more air door, causes the control of refrigerator complicated, cost up, and the competitiveness of product descends.
Summary of the invention
Technical problem to be solved by this invention provides a kind of band circulated air defrost frost-free refrigerator-freezer, and the high-temperature gas that utilizes refrigerating chamber defrosts, improves the circulation defrost road to cold utilization more than the evaporimeter to evaporimeter.Improve the refrigerator performance, strengthened the reliability that refrigerator uses, further, provide its control method.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of band circulated air defrost frost-free refrigerator-freezer, wherein, comprise the refrigerator chamber, be located at the refrigerator chamber temperature-sensitive head of refrigerator chamber sidewall, be located at the fan electromotor at back, refrigerator chamber, be located at the evaporimeter of fan electromotor bottom, be located at the defrost temperature-sensitive head of evaporimeter top air inlet pipe, be located at the refrigerator chamber return air inlet of base of evaporator, be provided with defrosting heater between base of evaporator and the refrigerator chamber return air inlet, the back of refrigerator chamber is provided with the refrigeration air outlet, and the door body of refrigerator is provided with the display screen of regulating temperature.Bottom, described refrigerator chamber also is provided with the first fruit and vegetable box and the second fruit and vegetable box.
Fan electromotor can force air to circulate, and evaporimeter can carry out cold output, and display screen is provided with button, can regulate the temperature of refrigerator chamber, and refrigerator chamber temperature-sensitive head is used for the actual temperature of perception refrigerator chamber, and the refrigeration modes of refrigerator chamber is frostless air-cooled.When refrigerator chamber temperature-sensitive head reaches turn-on temperature, judge first the temperature of evaporimeter by the defrost temperature-sensitive head.The temperature of defrost temperature-sensitive head is lower than the design temperature of display screen, elder generation's Half Speed starts the operation fan electromotor, utilizes the remaining cold of evaporimeter to be freezed in the refrigerator chamber, utilizes again the high-temperature gas of refrigerator chamber, floating frost to evaporator surface is scrubbed, and the frost layer of evaporimeter is removed.Except using the circulated air defrost, also assisted the defrosting heater defrost, the dual defrosting system, when guaranteeing that a certain type defrost was lost efficacy, the defrost of refrigerator all can be changed totally.
The cold-producing medium air inlet pipe position at evaporimeter top is fixed with the defrost temperature-sensitive head, and totally whether whether the defrost temperature-sensitive head be used for judging the evaporimeter defrost, and carries out the control of circulated air defrost or electric heater defrost.It is main adopting the circulated air defrost when defrost, and defrosting heater heating defrost is auxiliary, and when dual defrost guaranteed that a certain type defrost was lost efficacy, the defrost of refrigerator all can be changed totally, has guaranteed the quality of refrigerator, has improved the reliability of refrigerator.
Base of evaporator has the return air inlet of refrigerator chamber, the air outlet that refrigeration is arranged at the fan electromotor top, in the running of fan electromotor, the high-temperature gas of refrigerator chamber is got back to refrigerator chamber return air inlet, through evaporimeter, deliver to the refrigerator chamber from the refrigeration air outlet, form the circulation of an air current composition with this.
A kind of control method with circulated air defrost frost-free refrigerator-freezer, comprising following steps:
S1. refrigerator chamber temperature-sensitive head detects the indoor temperature of refrigerator, if reach turn-on temperature, carries out step S2;
S2. the defrost temperature-sensitive head detects the temperature of evaporimeter, and this temperature is T1, and the design temperature of display screen is T2;
If T1 carries out step S3 less than T2 and T2-T1＞=2 degree;
If T1 spends less than T2 and T2-T1＜=2 greater than T2 or T1, carry out step S4;
S3. Half Speed starts fan electromotor, utilizes the waste heat of evaporimeter to be freezed in the refrigerator chamber, utilizes again the high-temperature gas of refrigerator chamber, and the floating frost of evaporator surface is scrubbed, and the frost layer of evaporimeter is removed;
The defrost temperature-sensitive head detects the temperature of evaporimeter, if this temperature T 1 is stable, continues Half Speed and starts fan electromotor, utilizes the waste heat of evaporimeter to be freezed in the refrigerator chamber, until run to the shutdown temperature of refrigerator chamber temperature-sensitive head;
The defrost temperature-sensitive head detects the temperature of evaporimeter, if this temperature constantly raises, is increased to T1 and spends less than T2 and T2-T1＜=2 greater than T2 or T1, carries out step S4;
S4. start at full speed operation compressor and fan electromotor, freezed in the refrigerator chamber, run to the shutdown temperature of refrigerator chamber temperature-sensitive head.
Described display screen is provided with button, and the adjustable range of its temperature is 2～8 degree.The user can set the temperature of display screen according to the demand of self temperature.
Compared with prior art, beneficial effect is:
1, the present invention utilizes the high-temperature gas of refrigerator chamber, and the temperature of refrigerating chamber is generally [2 ℃ ~ 8 ℃], and the temperature of the evaporimeter of refrigerator in the time of compressor shutdown utilized the high-temperature gas of refrigerator chamber generally below 0 ℃, can defrost to evaporimeter.Basically the frost layer of evaporimeter all can be changed to the greatest extent in each shutdown; avoid the frost layer on the evaporimeter to add up owing to available machine time of compressor is long; refrigerating efficiency when having improved compressor operating; strengthened the reliability that refrigerator uses, prevented that the evaporimeter frost layer from causing the phenomenons such as defrost is bad because of accumulative total.
The temperature of the temperature of evaporimeter and refrigerator chamber was poor when 2, the present invention utilized refrigerator to shut down, and can utilize the remaining cold of evaporimeter to be freezed in the refrigerator chamber.But the power that in the circulation defrost process, needs the consumption of balance fan electromotor with utilize the cold border equalization point that freezes more than the evaporimeter, the refrigeration of seeking the remaining cold belt of evaporimeter is equal to, or greater than the power of fan electromotor operation consumption.
3, the present invention has also assisted the electric heater defrost except using the circulated air defrost, the dual defrosting system, and when guaranteeing that a certain type defrost was lost efficacy, the defrost of refrigerator all can be changed totally, has guaranteed the quality of refrigerator, has improved the reliability of refrigerator.
Description of drawings
Fig. 1 is refrigerator internal structure schematic diagram of the present invention.
Fig. 2 is refrigerator Facad structure schematic diagram of the present invention.
Fig. 3 is door part of refrigerator display screen structure schematic diagram of the present invention.
Fig. 4 is refrigerator controlling method principle schematic of the present invention.
The specific embodiment
Accompanying drawing only is used for exemplary illustration, can not be interpreted as the restriction to this patent; For better explanation the present embodiment, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in the accompanying drawing some known configurations and explanation thereof may to omit be understandable.
As Figure 1-3, a kind of band circulated air defrost frost-free refrigerator-freezer, wherein, comprise refrigerator chamber 11, be located at the refrigerator chamber temperature-sensitive head 21 of refrigerator chamber 11 sidewalls, be located at the fan electromotor 22 at 11 backs, refrigerator chamber, be located at the evaporimeter 24 of fan electromotor 22 bottoms, be located at the defrost temperature-sensitive head 23 of evaporimeter 24 top air inlet pipe, be located at the refrigerator chamber return air inlet 26 of evaporimeter 24 bottoms, be provided with defrosting heater 25 between evaporimeter 24 bottoms and the refrigerator chamber return air inlet 26, the back of refrigerator chamber 11 is provided with refrigeration air outlet 27, and the door body of refrigerator is provided with the display screen 28 of regulating temperature.11 bottoms, refrigerator chamber also are provided with the first fruit and vegetable box 12 and the second fruit and vegetable box 13.
Fan electromotor 22 can force air to circulate, evaporimeter 24 can carry out cold output, and display screen 28 is provided with button, can regulate the temperature of refrigerator chamber 11, refrigerator chamber temperature-sensitive head 21 is used for the actual temperature of perception refrigerator chamber 11, and the refrigeration modes of refrigerator chamber 11 is frostless air-cooled.When refrigerator chamber temperature-sensitive head 21 reaches turn-on temperature, judge first the temperature of evaporimeter 24 by defrost temperature-sensitive head 23.The temperature of defrost temperature-sensitive head 23 is lower than the design temperature of display screen 28, elder generation's Half Speed starts operation fan electromotor 22, utilizes the remaining cold of evaporimeter 24 to be freezed in refrigerator chamber 11, utilizes again the high-temperature gas of refrigerator chamber 11, floating frost to evaporimeter 24 surfaces is scrubbed, and the frost layer of evaporimeter 24 is removed.Except using the circulated air defrost, also assisted defrosting heater 25 defrosts, the dual defrosting system, when guaranteeing that a certain type defrost was lost efficacy, the defrost of refrigerator all can be changed totally.
The cold-producing medium air inlet pipe position at evaporimeter 24 tops is fixed with defrost temperature-sensitive head 23, and totally whether whether defrost temperature-sensitive head 23 be used for judging evaporimeter 24 defrosts, and carries out the control of circulated air defrost or electric heater defrost.It is main adopting the circulated air defrost when defrost, and defrosting heater 25 heating defrosts are auxiliary, and when dual defrost guaranteed that a certain type defrost was lost efficacy, the defrost of refrigerator all can be changed totally, has guaranteed the quality of refrigerator, has improved the reliability of refrigerator.
The return air inlet 26 of refrigerator chamber is arranged at evaporimeter 24 bottoms, the air outlet 27 that refrigeration is arranged at fan electromotor 22 tops, in the running of fan electromotor 22, the high-temperature gas of refrigerator chamber 11 is got back to refrigerator chamber return air inlet 26, through evaporimeter 24, deliver to refrigerator chamber 11 from refrigeration air outlet 27, form the circulation of an air current composition with this.Display screen 28 is provided with button, and the adjustable range of its temperature is 2～8 degree.The user can set the temperature of display screen according to the demand of self temperature.
As shown in Figure 4, a kind of control method with circulated air defrost frost-free refrigerator-freezer wherein, may further comprise the steps:
S1. the temperature in the refrigerator chamber temperature-sensitive head detection refrigerator chambers 11 21 if reach turn-on temperature, is carried out step S2;
S2. defrost temperature-sensitive head 23 detects the temperature of evaporimeter 24, and this temperature is T1, and the design temperature of display screen 28 is T2;
If T1 carries out step S3 less than T2 and T2-T1＞=2 degree;
If T1 spends less than T2 and T2-T1＜=2 greater than T2 or T1, evaporimeter 24 is available remaining cold less, exists the power of fan electromotor 22 operation consumption greater than utilizing evaporimeter more than the 24 cold effects of being freezed in refrigerator chamber 11, carries out step S4;
S3. Half Speed starts fan electromotor 22, because the temperature of refrigerator chamber 11 is generally 2 ℃ ~ 8 ℃, and the temperature of evaporimeter 24 in the time of compressor shutdown of refrigerator is generally below 0 ℃, utilize the waste heat of evaporimeter 24 to be freezed in refrigerator chamber 11, utilize again the high-temperature gas of refrigerator chamber 11, floating frost to evaporimeter 24 surfaces is scrubbed, and the frost layer of evaporimeter 24 is removed;
Defrost temperature-sensitive head 23 detects the temperature of evaporimeter 24, if this temperature T 1 is stable, continue Half Speed and start fan electromotor 22, utilize the waste heat of evaporimeter 24 to be freezed in refrigerator chamber 11, do not need to start compressor, until run to the shutdown temperature of refrigerator chamber temperature-sensitive head 21;
Defrost temperature-sensitive head 23 detects the temperature of evaporimeter 24, if this temperature constantly raises, is increased to T1 and spends less than T2 and T2-T1＜=2 greater than T2 or T1, carries out step S4;
S4. start at full speed operation compressor and fan electromotor 22, freezed in refrigerator chamber 11, run to the shutdown temperature of refrigerator chamber temperature-sensitive head 21.
In the process of circulated air defrost, the power that fan electromotor 22 consumes with utilize evaporimeter more than the 24 cold border equalization points that freeze to be about: suppose that defrost temperature-sensitive head 23 temperature are that the design temperature of T1, display screen 28 is that T2, fan electromotor 22 Half Speeds start and move consumed power P.Its balanced type is: the effect of operation circulated air defrost approximates the fan electromotor Half Speed and starts operation consumed power P during 2 ℃ of T2-T1=.The design temperature of the time of circulated air defrost with defrost temperature-sensitive head 23 and display screen 28 changes, but the power that the refrigeration that its effect keeps the remaining cold belt of evaporimeter consumes greater than fan electromotor.Reach the expection energy-saving effect.
Except using the circulated air defrost, also assisted the electric heater defrost, the dual defrosting system, when guaranteeing that a certain type defrost was lost efficacy, the defrost of refrigerator all can be changed totally, has guaranteed the quality of refrigerator, has improved the reliability of refrigerator.
The corresponding same or analogous parts of same or analogous label; Describe position relationship in the accompanying drawing and only be used for exemplary illustration, can not be interpreted as the restriction to this patent.
The above only is preferred embodiment of the present invention, should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can do the improvement of some suitable actual conditions to the technical scheme of invention.Therefore, protection scope of the present invention is not limited to this, and those of skill in the art are any to be included within protection domain of the present invention based on non-material change on the technical solution of the present invention.
Claims (4)
1. be with circulated air defrost frost-free refrigerator-freezer for one kind, it is characterized in that, comprise refrigerator chamber (11), be located at the refrigerator chamber temperature-sensitive head (21) of refrigerator chamber (11) sidewall, be located at the fan electromotor (22) at back, refrigerator chamber (11), be located at the evaporimeter (24) of fan electromotor (22) bottom, be located at the defrost temperature-sensitive head (23) of evaporimeter (24) top air inlet pipe, be located at the refrigerator chamber return air inlet (26) of evaporimeter (24) bottom, be provided with defrosting heater (25) between evaporimeter (24) bottom and the refrigerator chamber return air inlet (26), the back of refrigerator chamber (11) is provided with refrigeration air outlet (27), and the door body of refrigerator is provided with the display screen (28) of regulating temperature.
2. a kind of band circulated air defrost frost-free refrigerator-freezer according to claim 1 is characterized in that, bottom, described refrigerator chamber (11) also is provided with the first fruit and vegetable box (12) and the second fruit and vegetable box (13).
3. control method with circulated air defrost frost-free refrigerator-freezer is characterized in that may further comprise the steps:
S1. refrigerator chamber temperature-sensitive head (21) detects the temperature in the refrigerator chamber (11), if reach turn-on temperature, carries out step S2;
S2. defrost temperature-sensitive head (23) detects the temperature of evaporimeter (24), and this temperature is T1, and the design temperature of display screen (28) is T2;
If T1 carries out step S3 less than T2 and T2-T1＞=2 degree;
If T1 spends less than T2 and T2-T1＜=2 greater than T2 or T1, carry out step S4;
S3. Half Speed starts fan electromotor (22), utilize the waste heat of evaporimeter (24) that refrigerator chamber (11) are freezed, utilize again the high-temperature gas of refrigerator chamber (11), the floating frost on evaporimeter (24) surface is scrubbed, the frost layer of evaporimeter (24) is removed;
Defrost temperature-sensitive head (23) detects the temperature of evaporimeter (24), if this temperature T 1 is stable, continue Half Speed and start fan electromotor (22), utilize the waste heat of evaporimeter (24) that refrigerator chamber (11) are freezed, until run to the shutdown temperature of refrigerator chamber temperature-sensitive head (21);
Defrost temperature-sensitive head (23) detects the temperature of evaporimeter (24), if this temperature constantly raises, is increased to T1 and spends less than T2 and T2-T1＜=2 greater than T2 or T1, carries out step S4;
S4. start at full speed operation compressor and fan electromotor (22), refrigerator chamber (11) are freezed, run to the shutdown temperature of refrigerator chamber temperature-sensitive head (21).
4. a kind of control method with circulated air defrost frost-free refrigerator-freezer according to claim 3 is characterized in that, described display screen (28) is provided with button, and the adjustable range of its temperature is 2～8 degree.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329872A (en) * | 2014-10-24 | 2015-02-04 | 海信容声(广东)冰箱有限公司 | Refrigerator evaporator defrosting method |
| CN105466153A (en) * | 2016-01-13 | 2016-04-06 | 广东机电职业技术学院 | Portable cold and hot insulation box and temperature regulation method thereof |
| CN106382785A (en) * | 2016-08-31 | 2017-02-08 | 成都鲜生活冷链物流有限公司 | Defrosting method for cold chain transport vehicle |
| CN107120899A (en) * | 2017-04-27 | 2017-09-01 | 海信（山东）冰箱有限公司 | A kind of wind cooling refrigerator and its defrosting control method |
| CN107477973A (en) * | 2017-08-28 | 2017-12-15 | 合肥华凌股份有限公司 | Blower control method, system and refrigerator |
| CN108800715A (en) * | 2018-06-19 | 2018-11-13 | 海信（山东）冰箱有限公司 | Refrigeration equipment and control method |
| CN109442785A (en) * | 2018-10-30 | 2019-03-08 | 海信容声(广东)冰箱有限公司 | Refrigeration equipment and control method |
| CN110887315A (en) * | 2019-12-03 | 2020-03-17 | 珠海格力电器股份有限公司 | Refrigerator defrosting detection device, refrigerator defrosting control method and refrigerator |
| CN110940135A (en) * | 2019-12-09 | 2020-03-31 | 珠海格力电器股份有限公司 | Refrigerator and defrosting detection device and defrosting control method thereof |
| CN111306885A (en) * | 2020-03-03 | 2020-06-19 | 广东奥马冰箱有限公司 | Air-cooling full-refrigerating box return air defrosting control method |
| CN112460905A (en) * | 2020-11-19 | 2021-03-09 | 珠海格力电器股份有限公司 | Refrigerator return air defrosting control method and device and air-cooled refrigerator |
| CN113654296A (en) * | 2021-08-12 | 2021-11-16 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device, storage medium and refrigerator |
| CN114935237A (en) * | 2022-05-30 | 2022-08-23 | 合肥美菱物联科技有限公司 | Refrigerator defrosting system and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329872A (en) * | 2014-10-24 | 2015-02-04 | 海信容声(广东)冰箱有限公司 | Refrigerator evaporator defrosting method |
| CN105466153A (en) * | 2016-01-13 | 2016-04-06 | 广东机电职业技术学院 | Portable cold and hot insulation box and temperature regulation method thereof |
| CN106382785A (en) * | 2016-08-31 | 2017-02-08 | 成都鲜生活冷链物流有限公司 | Defrosting method for cold chain transport vehicle |
| CN107120899B (en) * | 2017-04-27 | 2019-09-20 | 海信（山东）冰箱有限公司 | A kind of wind cooling refrigerator and its defrosting control method |
| CN107120899A (en) * | 2017-04-27 | 2017-09-01 | 海信（山东）冰箱有限公司 | A kind of wind cooling refrigerator and its defrosting control method |
| CN107477973A (en) * | 2017-08-28 | 2017-12-15 | 合肥华凌股份有限公司 | Blower control method, system and refrigerator |
| CN108800715A (en) * | 2018-06-19 | 2018-11-13 | 海信（山东）冰箱有限公司 | Refrigeration equipment and control method |
| CN109442785B (en) * | 2018-10-30 | 2021-05-07 | 海信容声(广东)冰箱有限公司 | Refrigeration equipment and control method |
| CN109442785A (en) * | 2018-10-30 | 2019-03-08 | 海信容声(广东)冰箱有限公司 | Refrigeration equipment and control method |
| CN110887315A (en) * | 2019-12-03 | 2020-03-17 | 珠海格力电器股份有限公司 | Refrigerator defrosting detection device, refrigerator defrosting control method and refrigerator |
| CN110940135A (en) * | 2019-12-09 | 2020-03-31 | 珠海格力电器股份有限公司 | Refrigerator and defrosting detection device and defrosting control method thereof |
| CN111306885A (en) * | 2020-03-03 | 2020-06-19 | 广东奥马冰箱有限公司 | Air-cooling full-refrigerating box return air defrosting control method |
| CN112460905A (en) * | 2020-11-19 | 2021-03-09 | 珠海格力电器股份有限公司 | Refrigerator return air defrosting control method and device and air-cooled refrigerator |
| CN112460905B (en) * | 2020-11-19 | 2022-02-25 | 珠海格力电器股份有限公司 | Refrigerator return air defrosting control method and device and air-cooled refrigerator |
| CN113654296A (en) * | 2021-08-12 | 2021-11-16 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device, storage medium and refrigerator |
| CN113654296B (en) * | 2021-08-12 | 2022-07-15 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device, storage medium and refrigerator |
| CN114935237A (en) * | 2022-05-30 | 2022-08-23 | 合肥美菱物联科技有限公司 | Refrigerator defrosting system and control method |
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