CN112393492A - Humidity control method for refrigerating chamber and refrigerator - Google Patents

Humidity control method for refrigerating chamber and refrigerator Download PDF

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Publication number
CN112393492A
CN112393492A CN202011340725.7A CN202011340725A CN112393492A CN 112393492 A CN112393492 A CN 112393492A CN 202011340725 A CN202011340725 A CN 202011340725A CN 112393492 A CN112393492 A CN 112393492A
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CN
China
Prior art keywords
refrigerating chamber
temperature
humidity
refrigerating
preset
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
Application number
CN202011340725.7A
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Chinese (zh)
Inventor
肖凌峰
方茂长
汪猗吉
朱佳贝
李琦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202011340725.7A priority Critical patent/CN112393492A/en
Publication of CN112393492A publication Critical patent/CN112393492A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • 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
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D29/003—Arrangement or mounting of control or safety devices for movable 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
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0413—Treating air flowing to refrigeration compartments by purification by humidification
    • F25D2317/04131—Control means therefor
    • 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

Abstract

The invention discloses a humidity control method of a refrigerating chamber and a refrigerator1When the air conditioner is started, the refrigeration is stopped, the air at the evaporator is heated for a first preset time t in a circulating mode1Then introducing hot air into the refrigerating chamber for a second preset time period t2When the humidity of the refrigerating chamber reaches a second preset humidity RH2Or at a temperature higher than the starting temperature TonWhen the temperature is higher than the preset temperature, the refrigerating chamber recovers refrigeration and stops humidifying; when the refrigerating chamber is refrigerated, the temperature of the refrigerating chamber is kept within a preset temperature range by starting and stopping the compressor. Compared with the prior art, the invention can improve the humidity of the refrigerating chamberAnd simultaneously, the temperature and the humidity of the refrigerating chamber can be controlled within a reasonable range.

Description

Humidity control method for refrigerating chamber and refrigerator
Technical Field
The invention relates to the technical field of refrigeration, in particular to a humidity control method of a refrigerating chamber and a refrigerator.
Background
Along with the popularization rate of refrigeration equipment is higher and higher, especially in the aspect of food storage, the air-cooled refrigerator is widely used due to the advantages of high cooling speed and the like, but the humidity of a compartment can be reduced while air cooling is performed, so that the phenomenon of air drying of food or food needing high humidity is caused, and the problem of poor preservation effect of the refrigerator is caused. In order to solve the problem that the moisturizing effect of the air-cooled refrigerator is not good, the method that water vapor around an evaporator is introduced into a compartment of the refrigerator by using the operation of a fan when a compressor does not refrigerate is adopted in the prior art to achieve moisturizing, but the method has the following problems: 1. the temperature of the evaporator is generally below-18 ℃, the temperature of the refrigerating chamber is above 0 ℃, and at the moment, the low-temperature gas is introduced into the compartment by the operation of the fan, so that the humidifying and moisturizing effects cannot be started; meanwhile, when the compartment does not need to be refrigerated, the cold air of the evaporator is introduced into the compartment, so that the temperature of the compartment is lower and lower, and the preservation is not facilitated.
Disclosure of Invention
The invention provides a humidity control method of a refrigerating chamber and a refrigerator, which solve the problem that the temperature and the humidity of a storage chamber cannot be ensured in the prior art.
The technical scheme adopted by the invention is as follows: a humidity control method for a refrigerating chamber comprises an evaporator, when the refrigerating chamber is monitored to be humidified in the refrigerating process of the refrigerating chamber, the refrigerating chamber stops refrigerating, air at the position of the evaporator is heated and then is introduced into the refrigerating chamber, and when the refrigerating chamber is monitored to reach a refrigerating condition, the refrigerating chamber resumes refrigerating and stops humidifying.
Further, when the humidity of the refrigerating chamber is less than a first preset humidity RH1When this happens, the cold room needs to be humidified.
Further, when the refrigerating chamber is refrigerated, the temperature of the refrigerating chamber is monitored, and the temperature of the refrigerating chamber is kept within a preset temperature range by starting and stopping the compressor.
Further, the preset temperature range is from a preset shutdown temperature ToffTo the starting temperature TonWhen the temperature of the refrigerating chamber is lower than the preset shutdown temperature ToffWhen the temperature of the refrigerating chamber is higher than the starting temperature T, the compressor stops runningonAnd when the compressor is started to operate.
Preferably, the air at the evaporator is heated for a first preset time period t1Then introducing hot air into the refrigerating chamber for a second preset time period t2。
Preferably, the steps of heating the air at the evaporator and introducing the hot air into the refrigerating compartment are performed cyclically.
Further, the refrigeration conditions are: the humidity of the refrigerating chamber reaches a second preset humidity RH2Or the temperature of the refrigerating chamber is higher than the starting temperature Ton。
Preferably, the boot temperature Ton= Preset Start-Up temperature Ton`+5℃。
A refrigerator comprises a controller and a refrigerating chamber, wherein the controller adjusts the humidity of the refrigerating chamber by adopting the humidity control method.
Furthermore, the refrigerator also comprises a heater arranged on the evaporator, an air duct for introducing air at the evaporator into the refrigerating chamber and an air door for controlling the refrigerating chamber and the air duct to be switched on and off, wherein the heater and the air door are electrically connected with the controller.
Compared with the prior art, when the humidification of the refrigerating chamber is monitored in the refrigerating process of the refrigerating chamber, the refrigeration is stopped, the air at the evaporator is heated and then introduced into the refrigerating chamber, so that the air near the evaporator is humidified after the frost on the surface of the evaporator is heated, the humidity of the refrigerating chamber is improved, and the humidification is stopped and the refrigerating chamber is normally refrigerated according to whether the refrigerating chamber reaches a refrigeration condition or not, so that the temperature and the humidity of the refrigerating chamber are changed to ensure that the temperature and the humidity of the refrigerating chamber are controlled within a reasonable range.
Meanwhile, the simple control method is provided based on the existing structure, the cost is low, meanwhile, the evaporator can be defrosted while the refrigerating chamber is humidified, and the energy-saving effect is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic view of a refrigerator according to the present invention;
FIG. 2 is a schematic flow chart of the humidity control of the refrigerating compartment according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present application proposes a humidity control method for a refrigerator and a refrigerating chamber, as shown in fig. 1, the refrigerator of the present invention comprises a main body 1, the main body 1 comprises an evaporator 2, the evaporator 2 is mainly used for refrigerating; the outer surface of the evaporator 2 is also provided with a heater 3, and the heater 3 is used for heating and liquefying frost on the surface of the evaporator 2, so that the evaporator 2 can keep the heat exchange efficiency; the main body 1 further comprises a refrigerating chamber 4, the refrigerating chamber 4 is communicated with the evaporator 2 through an air duct 5, a fan 6 is arranged on the air duct 5, and the fan 6 introduces air near the evaporator 2 into the refrigerating chamber 4 for refrigeration; an air outlet 7 is arranged on the refrigerating chamber 4 and used for leading out air after heat exchange so as to continuously circulate cold air.
The air duct 5 is further provided with an air door 51, the upper end of the main body 1 is provided with a controller 8, the main body 1 is further provided with a compressor 9, the compressor 9 is used for controlling the pressure rise of the refrigerant, and the controller 8 is electrically connected with the air door 51, the fan 6, the compressor 9 and the heater 3 to regulate and control the humidity and the temperature of the refrigerating chamber 4.
Further, the present application also provides a humidity control method for a refrigerating chamber, as shown in fig. 2, the control method is mainly to monitor the humidity of the refrigerating chamber when the refrigerating chamber is normally refrigerated, when the humidity of the refrigerating chamber reaches a humidification condition, the refrigeration is stopped and the air near the evaporator 2 is heated, so that the cold air near the evaporator 2 becomes hot humid air with relatively high temperature, the hot humid air is introduced into the refrigerating chamber 4 through the air duct 5 to change the humidity of the refrigerating chamber 4, meanwhile, various indexes of the refrigerating chamber 4 are monitored to judge whether the refrigerating chamber 4 reaches the refrigeration condition, and when the refrigerating chamber 4 reaches the refrigeration condition, the compressor 9 is started to recover the normal refrigeration of the refrigerating chamber 4. Through such control mode, on the basis of guaranteeing that the refrigerating chamber satisfies its cold-stored condition, the humidity to the refrigerating chamber has risen again, on the basis of current refrigerator structure, does not increase any structure, makes the refrigerator can possess fine humidification and the effect that adjusts the temperature, does not increase the cost and has promoted the cold-stored effect of refrigerating chamber as far as simultaneously.
It should be noted that the normal refrigeration of the refrigerating chamber refers to an operation mode adopted by the refrigerating chamber based on the change of the internal temperature condition of the refrigerating chamber, that is, the temperature of the refrigerating chamber 4 is controlled to be within a normal range, when the temperature value of the refrigerating chamber 4 reaches the lower limit, the compressor is turned off to stop the refrigeration, and when the temperature of the refrigerating chamber 4 is increased to the upper limit, the compressor is turned on to continue the refrigeration, so that the temperature of the refrigerating chamber is kept within a reasonable range.
Preferably, the temperature normal range interval of the refrigerating compartment 4 is from a preset shutdown temperature ToffTo the starting temperature TonWhen the temperature of the refrigerating chamber is lower than the preset shutdown temperature ToffWhen the temperature of the refrigerating chamber is higher than the starting temperature T, the compressor stops runningonThe compressor is started to run, and in actual operation, the starting temperature Ton= Preset Start-Up temperature Ton"5 ℃, i.e., the actual boot temperature is based on the predetermined boot temperature TonThe +5 ℃ is obtained, the compensation amount of 5 ℃ is increased on the basis of the preset starting temperature, the hysteresis quality of temperature regulation of the refrigerating chamber 4 is weakened, and the temperature of the refrigerating chamber 4 can be regulated and controlled in time.
By monitoring the refrigerating compartment 4 while the refrigerating compartment 4 is normally refrigeratedDetermines whether the refrigerating compartment 4 needs to be humidified, and when it is determined that the humidity RH in the refrigerating compartment 4 is less than a first preset humidity RH1In this embodiment, the controller 8 controls the compressor 9 to stop operating, and the heater 3 is turned on to heat the air near the evaporator 2, so as to humidify the cold air and introduce the humidified cold air into the refrigerating chamber 4 to raise the humidity of the refrigerating chamber 4.
Furthermore, the method mainly includes the step of supplementing moisture to the refrigerating chamber 4 through an intermittent heating and moisture supplementing method, wherein the evaporator 2 is heated for a first preset time t1Then introducing hot air into the refrigerating chamber for a second preset time period t2The step of heating by the evaporator 2 and introducing air into the refrigerating compartment 4 is cyclically performed; in the present embodiment, the evaporator 2 is heated for a first preset time period t1For 10min, and then introducing hot air into the refrigerating chamber 4 for a second preset time period t2At 5min, by heating at intervals and introducing the introduced hot air, the cold air near the evaporator 2 can be effectively humidified, and the temperature near the evaporator 2 can be kept within a controllable range, so that the waste of energy caused by excessive heating on the evaporator 2 when the moisture amount needed by the refrigerating chamber 4 is enough is avoided.
And when the humidity of the refrigerating chamber 4 is heated, because the humidity with higher temperature is introduced, the humidity and the temperature in the refrigerating chamber 4 can be increased, so that the refrigerating chamber 4 can have a good storage effect in the humidifying process, whether the refrigerating chamber meets the refrigerating condition needs to be monitored in real time, when the refrigerating chamber 4 meets the refrigerating condition, the heater 3 is closed to stop humidifying the refrigerating chamber 4, and the compressor 9 is started to normally refrigerate the refrigerating chamber 4.
Further, the refrigeration condition in this application is that the humidity of the refrigerating chamber 4 reaches the second preset humidity RH2Or the temperature of the refrigerating chamber is higher than the starting temperature TonWhen it is detected that any one of the humidity condition and the temperature condition in the refrigerating compartment 4 reaches its corresponding value, it is indicated that the condition in the refrigerating compartment 4 is not suitable for storage, and therefore, at this time, humidification is stopped and refrigeration is resumed to ensure coldnessThe values of the parameters of the storeroom 4 can meet the refrigeration requirement. Namely, when the refrigerating chamber 4 is humidified, the humidity and the temperature of the refrigerating chamber 4 are monitored in real time, and if the humidity does not reach the second preset humidity RH2And the temperature does not rise to the starting temperature TonContinuing to humidify at the moment; when the humidity does not reach the second preset humidity RH2But the temperature rises to the boot temperature TonIf so, the heater 3 is closed to stop heating continuously, and the compressor 9 is started to recover normal refrigeration; when the humidity reaches a second preset humidity RH2If the temperature of the refrigerating chamber 4 is higher than the preset temperature, the heater 3 is turned off to stop heating and humidifying continuously, and the refrigerating chamber 4 is returned to the normal refrigerating mode.
Preferably, the above RH1And RH2Are all set by the user, and the humidity ranges from RH1To RH2The humidity of the refrigerating compartment 4 is limited to a certain range, and may be selected from 0 to 30%, 30% to 40%, 40% to 50%, 50% to 60%, 60% to 70%, 70% to 100%, and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A humidity control method for a refrigerating chamber comprises an evaporator and is characterized in that when the refrigerating chamber is monitored to be humidified in the refrigerating process of the refrigerating chamber, refrigeration is stopped, air at the evaporator is heated and then introduced into the refrigerating chamber, and when the refrigerating chamber is monitored to reach the refrigeration condition, the refrigerating chamber is refrigerated again and humidification is stopped.
2. The humidity control method as claimed in claim 1, wherein when the humidity of the refrigerating compartment is less than a first predetermined humidity RH1When this happens, the cold room needs to be humidified.
3. The method as claimed in claim 1, wherein the temperature of the refrigerating chamber is monitored while refrigerating the refrigerating chamber, and the temperature of the refrigerating chamber is maintained within a preset temperature range by starting and stopping the compressor.
4. A humidity control method according to claim 3, characterized in that said preset temperature range is from a preset shutdown temperature ToffTo the starting temperature TonWhen the temperature of the refrigerating chamber is lower than the preset shutdown temperature ToffWhen the temperature of the refrigerating chamber is higher than the starting temperature T, the compressor stops runningonAnd when the compressor is started to operate.
5. A humidity control method as in claim 1 wherein the air at the evaporator is first heated for a first preset time period t1Then introducing hot air into the refrigerating chamber for a second preset time period t2。
6. A humidity control method as in claim 5 wherein the steps of heating the air at the evaporator and introducing the heated air into the refrigerated compartment are performed cyclically.
7. A humidity control method as in claim 1 wherein said refrigeration conditions are: the humidity of the refrigerating chamber reaches a second preset humidity RH2Or the temperature of the refrigerating chamber is higher than the starting temperature Ton。
8. A humidity control method according to claim 4 or claim 7 in which the start-up temperature Ton= Preset Start-Up temperature Ton`+5℃。
9. A refrigerator comprising a controller and a refrigerating compartment, wherein the controller adjusts humidity of the refrigerating compartment by using the humidity control method as claimed in any one of claims 1 to 8.
10. The refrigerator of claim 9, further comprising a heater disposed on the evaporator, an air duct for introducing air at the evaporator into the refrigerating chamber, and a damper for controlling the opening and closing of the refrigerating chamber and the air duct, wherein the heater and the damper are electrically connected to the controller.
CN202011340725.7A 2020-11-25 2020-11-25 Humidity control method for refrigerating chamber and refrigerator Pending CN112393492A (en)

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CN202011340725.7A CN112393492A (en) 2020-11-25 2020-11-25 Humidity control method for refrigerating chamber and refrigerator

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Application Number Priority Date Filing Date Title
CN202011340725.7A CN112393492A (en) 2020-11-25 2020-11-25 Humidity control method for refrigerating chamber and refrigerator

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CN112393492A true CN112393492A (en) 2021-02-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024016840A1 (en) * 2022-07-22 2024-01-25 青岛海尔特种电冰柜有限公司 Humidity control method for refrigeration device
CN117450740A (en) * 2023-12-19 2024-01-26 珠海格力电器股份有限公司 Quick freezing control method and device, quick freezer and storage medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112008001095T5 (en) * 2007-04-26 2010-02-18 Panasonic Corporation, Kadoma-shi Refrigerator and electrical device
CN102519220A (en) * 2011-09-14 2012-06-27 合肥美的荣事达电冰箱有限公司 Refrigerator and humidity control method for refrigerating chamber of refrigerator
CN110440502A (en) * 2019-08-28 2019-11-12 长虹美菱股份有限公司 A kind of wind cooling refrigerator defrost humidifying device and its control method
CN111397303A (en) * 2020-03-31 2020-07-10 海信（山东）冰箱有限公司 Refrigeration equipment and control method thereof
CN111854120A (en) * 2020-07-08 2020-10-30 广东美的暖通设备有限公司 Control method of refrigerating device and refrigerating device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112008001095T5 (en) * 2007-04-26 2010-02-18 Panasonic Corporation, Kadoma-shi Refrigerator and electrical device
CN102519220A (en) * 2011-09-14 2012-06-27 合肥美的荣事达电冰箱有限公司 Refrigerator and humidity control method for refrigerating chamber of refrigerator
CN110440502A (en) * 2019-08-28 2019-11-12 长虹美菱股份有限公司 A kind of wind cooling refrigerator defrost humidifying device and its control method
CN111397303A (en) * 2020-03-31 2020-07-10 海信（山东）冰箱有限公司 Refrigeration equipment and control method thereof
CN111854120A (en) * 2020-07-08 2020-10-30 广东美的暖通设备有限公司 Control method of refrigerating device and refrigerating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024016840A1 (en) * 2022-07-22 2024-01-25 青岛海尔特种电冰柜有限公司 Humidity control method for refrigeration device
CN117450740A (en) * 2023-12-19 2024-01-26 珠海格力电器股份有限公司 Quick freezing control method and device, quick freezer and storage medium

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Application publication date: 20210223

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