Refrigerator and control method therefor

Abstract

A refrigerator and a control method therefor. The refrigerator (100) comprises: a refrigeration system (60) configured for reducing a temperature of a target compartment within the refrigerator (100); a temperature sensor (70) configured for measuring the temperature of the target compartment within the refrigerator (100); a fan (80) configured for driving an air flow within the target compartment within the refrigerator (100); a control apparatus (90), which is connected to the refrigeration system (60), the temperature sensor (70), and the fan (80), respectively, and configured for: acquiring an air humidity of an external environment when the refrigeration system (60) and the fan (80) are turned off and the temperature of the target compartment is lower than the dew point temperature; and when the air humidity of the external environment exceeds a preset humidity, while keeping the refrigeration system (60) turned off, turning on the fan (80) at a fan (80) rotational speed that is positively correlated with the air humidity of the external environment.

Description

Refrigerator and control method thereof

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024108155343, filed on June 21, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] Some embodiments of the present application relate to refrigerator technology. More specifically, to a refrigerator and a control method thereof. BACKGROUND

[0004] A frost-free refrigerator is a type of refrigerator that uses a fan and an air circulation system to achieve refrigeration and defrosting. Compared with a relevant art direct-cooling refrigerator, the frost-free refrigerator can uniformly distribute cold air to every corner of the refrigerator, thereby avoiding the formation of frost.

[0005] The fan of the relevant art frost-free refrigerator is usually only started during the compressor refrigeration operation process, and is in a shutdown state when the compressor is shut down. When the refrigerator is in a high-humidity environment, external moisture enters the compartment through the door seal, the gap of the door body, and other parts of the refrigerator, causing the compartment of the refrigerator to produce condensation, frost, and ice under a high-humidity environment. SUMMARY

[0006] Some embodiments of the present application provide a refrigerator, which comprises:

[0007] a refrigeration system configured to reduce the temperature of a target compartment in the refrigerator;

[0008] a temperature sensor configured to detect the temperature of the target compartment in the refrigerator;

[0009] a fan configured to drive the air flow in the target compartment in the refrigerator;

[0010] the control device is connected with the refrigeration system, the temperature sensor, and the fan respectively, and is configured to:

[0011] when the refrigeration system and the fan are closed, and the temperature of the target compartment is lower than the dew point temperature, the air humidity of the external environment is obtained; when the air humidity of the external environment exceeds a preset humidity, the fan is opened at a fan speed that is positively correlated with the air humidity of the external environment while the refrigeration system is maintained closed.

[0012] In some embodiments of this application, the preset humidity includes a preset first humidity and a preset second humidity; the control device is configured to: control the fan in the target room to operate at a first speed when the ambient air humidity exceeds the preset first humidity; control the fan in the target room to operate at a second speed when the ambient air humidity exceeds the preset second humidity but does not exceed the preset first humidity; and control the fan in the target room to operate at a third speed when the ambient air humidity is lower than the preset second humidity; wherein the first speed, the second speed, and the third speed are different from each other.

[0013] In some embodiments of this application, the second rotational speed is less than the first rotational speed, and the third rotational speed is less than the second rotational speed.

[0014] In some embodiments of this application, the third rotational speed is zero.

[0015] In some embodiments of this application, the refrigerator further includes: a humidity sensor disposed in the target compartment of the refrigerator and configured to detect the humidity of the target compartment inside the refrigerator; the control device is further configured to: acquire the humidity of the target compartment when the ambient air humidity is lower than a preset second humidity and the refrigeration system and the fan are turned off; determine the dew point temperature of the target compartment based on the temperature and humidity of the target compartment; and turn on the fan while keeping the refrigeration system off when the temperature of the target compartment is lower than the dew point temperature.

[0016] In some embodiments of this application, the refrigerator also supports multiple control modes, and the fan runs for different durations corresponding to different control modes. The control device is further configured to: when the refrigeration system and the fan are off and the temperature of the target compartment is lower than the dew point temperature, acquire the control mode selected by the user and the air humidity of the external environment; determine the target running time of the fan according to the acquired control mode selected by the user; and when the air humidity of the external environment exceeds a preset humidity, keep the refrigeration system off while turning on the fan according to the target running time.

[0017] In some embodiments of this application, the multiple control modes include a first control mode and a second control mode; the operating time of the fan in the first control mode is greater than the operating time of the fan in the second control mode; the control device is configured to: when the air humidity of the external environment exceeds a preset humidity, while keeping the cooling system off, turn on the fan according to the target operating time corresponding to the first control mode or the second control mode.

[0018] In some embodiments of this application, the control device is further configured to turn on the fan inside the target compartment when the target compartment of the refrigerator is opened.

[0019] Some embodiments of this application provide a method for controlling a refrigerator, the refrigerator comprising:

[0020] The refrigeration system is configured to lower the temperature of the target compartment inside the refrigerator.

[0021] A temperature sensor configured to detect the temperature of a target compartment inside the refrigerator;

[0022] A fan, configured to drive airflow within the target compartment of the refrigerator;

[0023] The control device is connected to the refrigeration system, the temperature sensor, and the fan, respectively.

[0024] The method includes: using the control device.

[0025] When the refrigeration system and the fan are off, and the temperature of the target room is below the dew point temperature, the humidity of the external environment is obtained;

[0026] When the ambient air humidity exceeds a preset humidity, the cooling system remains off while the fan is turned on at a speed positively correlated with the ambient air humidity.

[0027] In some embodiments of this application, the preset humidity includes a preset first humidity and a preset second humidity; the method includes: using the control device...

[0028] When the ambient air humidity exceeds a preset first humidity, the fan in the target room is controlled to run at a first speed.

[0029] When the ambient air humidity exceeds a preset second humidity but does not exceed a preset first humidity, the fan in the target room is controlled to run at a second speed.

[0030] When the ambient air humidity is lower than the preset second humidity, the fan in the target room is controlled to run at the third speed.

[0031] The first rotational speed, the second rotational speed, and the third rotational speed are different from each other.

[0032] In some embodiments of this application, the second rotational speed is less than the first rotational speed, and the third rotational speed is less than the second rotational speed.

[0033] In some embodiments of this application, the third rotational speed is zero.

[0034] In some embodiments of this application, a humidity sensor is further provided in the target compartment of the refrigerator, and the method further includes: using the control device...

[0035] The humidity of the target room is acquired when the cooling system and the fan are turned off;

[0036] The dew point temperature of the target room is determined based on the temperature and humidity of the target room.

[0037] When the temperature in the target room is lower than the dew point temperature, the cooling system is kept off while the fan is turned on.

[0038] In some embodiments of this application, the refrigerator also supports multiple control modes, and the runtime of at least the fan varies depending on the control mode. The method further includes: using the control device...

[0039] When the cooling system and the fan are off, and the temperature of the target room is below the dew point temperature, the user-selected control mode and the ambient air humidity are obtained.

[0040] The target runtime of the fan is determined based on the control mode selected by the user.

[0041] When the ambient air humidity exceeds the preset humidity, the cooling system remains off while the fan is turned on for the target operating time.

[0042] In some embodiments of this application, the multiple control modes include a first control mode and a second control mode; the operating time of the fan in the first control mode is greater than the operating time of the fan in the second control mode; the method includes: using the control device, when the air humidity of the external environment exceeds a preset humidity, keeping the cooling system off while turning on the fan according to the target operating time corresponding to the first control mode or the second control mode.

[0043] In some embodiments of this application, the method further includes: turning on a fan inside the target compartment of the refrigerator when the target compartment is opened via the control device. Attached Figure Description

[0044] To more clearly illustrate the implementation methods in some embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0045] Figure 1 is a schematic diagram of a refrigerator in some embodiments of this application;

[0046] Figure 2 is a cross-sectional view of AA in Figure 1;

[0047] Figure 3 is a schematic diagram of the internal structure of Figure 1 after the door body has been removed;

[0048] Figure 4 is a schematic diagram of the internal structure of the cold storage compartment after the front cover of the cold storage compartment is removed in Figure 3.

[0049] Figure 5 is a schematic diagram of the internal structure of the back panel of the cold storage compartment.

[0050] Figure 6 is a schematic diagram of the external structure of the back panel of the cold storage compartment.

[0051] Figure 7 is a schematic diagram of the front structure of the back panel of the variable temperature compartment and the freezer compartment;

[0052] Figure 8 is a schematic diagram of the rear structure of the back panel of the variable temperature compartment and the freezer compartment;

[0053] Figure 9 is a schematic diagram of the internal structure of the back panel of the variable temperature compartment and the freezer compartment;

[0054] Figure 10 is a schematic flowchart of a refrigerator control method provided in some embodiments of this application;

[0055] Figure 11 is a flowchart illustrating another refrigerator control method provided in some embodiments of this application;

[0056] Figure 12 is a flowchart illustrating another refrigerator control method provided in some embodiments of this application;

[0057] Figure 13 is a schematic block diagram of a refrigerator provided in some embodiments of this application.

[0058] Explanation of reference numerals in the attached diagram: 100, Refrigerator; 10, Door; 20, Cabinet; 211, Refrigerator compartment; 212, Variable temperature compartment; 213, Freezer compartment; 214, Ice maker; 22, Front cover of the refrigerator compartment; 23, Rear cover of the refrigerator compartment; 24, Front cover of the variable temperature compartment; 25, Front cover of the freezer compartment; 26, Rear cover of the freezer compartment; 27, Foam cover of the freezer air duct; 30, Compressor; 31, Refrigerator evaporator; 32, Refrigerator fan; 331, Refrigerator air inlet; 332, Refrigerator air return inlet; 333, Refrigerator air supply duct; 334, Refrigerator air return duct; 335, Sealing rib; 336, Return air notch; 341, Variable temperature compartment return air inlet; 342, Variable temperature compartment air inlet; 351. Freezer compartment return air vent; 352. Freezer compartment air supply vent; 36. Refrigeration fan; 37. Variable temperature compartment electric damper; 41. Refrigeration compartment temperature sensor; 42. Variable temperature compartment temperature sensor; 43. Freezer compartment temperature sensor; 44. Refrigeration compartment evaporator temperature sensor; 50. First humidity sensor; 51. Second humidity sensor; 60. Refrigeration system; 70. Temperature sensor; 80. Fan. Detailed Implementation

[0059] To make the implementation of this application clearer, some implementations of this application will be clearly and completely described below with reference to the accompanying drawings of some embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0060] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning. In addition, the terms "comprising" and "having," and any variations thereof, are intended to be omnipresent but not exclusive. For example, a product or device that comprises a series of components is not necessarily limited to those components that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0061] In related technologies, the fan of a frost-free refrigerator typically only starts during compressor operation and remains off when the compressor stops. The compressor's activation is solely related to the increase in internal temperature. In high-humidity environments, since humidity has little impact on internal temperature, the compressor won't activate due to increased humidity. However, external moisture can enter the refrigerator compartment through door seals and gaps, causing condensation, frost, and ice buildup. While continuously running the fan might reduce condensation, it also leads to significant energy waste and increases refrigerator noise levels. In some embodiments, an external humidity level exceeding 30% but not exceeding 50% is considered moderate humidity; an external humidity level exceeding 50%, such as reaching 70%, is considered high humidity.

[0062] In view of this, the main technical concept of the refrigerator provided in some embodiments of this application is: when the compressor of the refrigeration system stops, the speed of the fan inside the refrigerator is controlled according to the ambient humidity, thereby dynamically adjusting the air flow speed inside the refrigerator, reducing condensation in the compartment, and reducing energy consumption and noise interference caused by the fan.

[0063] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] It should be noted that some embodiments of this application are not only applicable to air-cooled refrigerators with air outlets through duct covers, but also to refrigerators with top air curtains or side air curtains for the compartments. The following describes some embodiments of this application in detail using an air-cooled refrigerator with air outlets through duct covers as an example.

[0065] Figure 1 is a schematic diagram of a refrigerator in some embodiments of this application; Figure 2 is a cross-sectional view AA in Figure 1; Figure 3 is a schematic diagram of the internal structure of Figure 1 after the door is removed. When the user faces the refrigerator door, the width direction of the refrigerator, i.e., the left-right direction, corresponds to the X-axis direction in Figure 1; the depth direction of the refrigerator, i.e., the depth direction of the compartments, i.e., the front-back direction, corresponds to the Y-axis direction in Figure 2; and the height direction of the refrigerator, i.e., the up-down direction, corresponds to the Z-axis direction in Figure 1. The width of the refrigerator door is the dimension along the X-axis direction when the door is closed, the thickness of the door is the dimension along the Y-axis direction when the door is closed, and the height of the door is the dimension along the Z-axis direction.

[0066] As shown in Figures 1 and 2, some embodiments of the refrigerator of this application include a door 10 and a cabinet 20. The cabinet 20 includes a storage compartment with a front opening for storing food and other items. The door 10 is installed on the front side of the storage compartment and is used to open or close the storage compartment. In some embodiments, there may be one storage compartment; or there may be multiple storage compartments, which may be arranged at intervals along the height and / or width of the refrigerator. For example, the storage compartments may be divided into freezer compartments, refrigerator compartments, and variable temperature compartments according to different storage temperatures. For another example, shelves may be provided in the storage compartment to increase the placement space for items. Furthermore, drawers may be provided in the storage compartment, which can be pulled out relative to the depth of the refrigerator for convenient categorized storage and retrieval of items.

[0067] In some embodiments, the door 10 is rotatably mounted on the housing 20 to open or close the storage compartments. Exemplarily, the door 10 is rotatably connected to the housing via a hinge assembly. When multiple storage compartments are provided, there may be one door 10, with multiple storage compartments sharing one door 10; alternatively, there may be multiple doors 10, each corresponding to a different storage compartment.

[0068] In some embodiments, at least one shelf is provided on the door 10, with the shelf opening upwards for storing items. In some embodiments of this application, a shelf is provided on the door 10 corresponding to the refrigerated compartment. Multiple shelves are arranged at intervals along the height direction of the door 10 to further increase the storage space for items. In some embodiments, multiple shelves are arranged at non-uniform intervals along the height direction of the door 10. The storage height H of the shelves is different. Wherein, the storage height H of the shelf is the height interval between the support plane of the shelf and the bottom surface of the shelf above it, and the storage height H of the top shelf is the interval between the shelf and the top seal of the door 10. In this way, while increasing the storage space for items, it can accommodate items of different heights.

[0069] Referring to FIG2, the refrigerator in some embodiments of this application further includes a compressor 30. The compressor 30 is used to lower the temperature of the refrigerator's storage compartment, so that the storage compartment can perform refrigeration or freezing tasks according to a preset temperature, thereby extending the storage time of items placed in the storage compartment. In some embodiments, the storage compartment includes a refrigerator compartment 211, a variable temperature compartment 212, and a freezer compartment 213. Referring to FIGS. 2 and 3, the refrigerator compartment 211, the variable temperature compartment 212, and the freezer compartment 213 are arranged sequentially from top to bottom.

[0070] In some embodiments, as shown in FIG4, a temperature sensor for detecting temperature changes in the storage room is also provided in the storage room. The temperature sensor is provided in different storage rooms, including a refrigerator compartment temperature sensor 41 in the refrigerator compartment 211, a variable temperature compartment temperature sensor 42 in the variable temperature compartment 212, and a freezer compartment temperature sensor 43 in the freezer compartment 213.

[0071] Referring again to Figure 2, some embodiments of the refrigerator in this application further include a first humidity sensor 50. The first humidity sensor 50 is configured to detect the humidity of the outside air. The first humidity sensor 50 can be disposed on the top of the refrigerator body 20 near the refrigerator door 10 to achieve relatively accurate detection of the air humidity when entering the storage compartment through the door 10. In some embodiments, the first humidity sensor 50 can also be disposed on the side of the body 20, or the bottom surface of the body 20, or even the back of the body 20, or on the door 10, as long as it can come into contact with the outside air. In some embodiments, the refrigerator does not have a first humidity sensor 50, but is provided with a communication component, which is used to connect with other third-party terminals that can detect the current ambient humidity to obtain the current ambient humidity.

[0072] Referring to Figure 3, in some embodiments, an ice-making chamber 214 may also be provided inside the refrigerator compartment 211. The ice-making chamber 214 is used to make ice cubes and cold drinks. The refrigerator compartment 211 has an independent refrigeration evaporator 31 (refer to Figure 4), which can realize independent cooling of the refrigerator compartment 211 and an independent supply and return air system, avoiding odor transfer with other compartments, and also providing a relatively short cooling path for the ice-making chamber 214. Continuing to refer to Figure 3, the refrigerator compartment 211 adopts a front-exhaust cooling method. The refrigeration air supply vent 331 is located above the refrigerator compartment 211, and the refrigeration return air vent 332 (refer to Figure 4) is located below the refrigerator compartment 211. The low-temperature air blown out by the refrigeration air supply vent 331 mixes with the air inside the refrigerator compartment 211, quickly lowering the temperature of the refrigerator compartment 211, thereby achieving cooling of the refrigerator compartment 211. In order to maintain the refrigeration temperature in the refrigeration compartment 211, the outlet air temperature of the refrigeration compartment 211 is usually low (generally ≤-15℃), and the temperature near the refrigeration air outlet 331 will be even lower. The ice maker 214 can be close to the upper refrigeration air outlet 331, but the water supply system should be installed away from this location.

[0073] Figure 4 is a schematic diagram of the internal structure of the refrigerator compartment after removing the front cover of Figure 3; Figure 5 is a schematic diagram of the internal structure of the back panel of the refrigerator compartment. Referring to Figures 4 and 5, the refrigerator compartment 211 includes a refrigerator evaporator 31 and a refrigerator fan 32. The refrigerator fan 32, also known as a refrigerator fan, is located above the refrigerator evaporator 31. It is used to transport the cooled air from the refrigerator evaporator 31 to the refrigerator compartment 211 through the refrigerator air supply channel 333 connected to the refrigerator air supply port 331 from the top, driven by the refrigerator fan. Meanwhile, the hot air in the refrigerator compartment 211 is transported to the refrigerator evaporator 31 from the bottom through the refrigerator return air channel 334 connected to the refrigerator return air port 331, for the next refrigeration cycle in the refrigerator compartment 211. In some embodiments, the refrigerator compartment 211 is further provided with a refrigerator compartment evaporator temperature sensor 44, which is located near the refrigerator evaporator 31, for example, above it, to sense the defrosting temperature of the refrigerator evaporator 31, so that the refrigerator evaporator 31 can operate efficiently under the condition of temperature indication.

[0074] Since the refrigeration evaporator 31 dries the hot air while cooling, the output cold air has a low moisture content and is less prone to condensation. Therefore, by increasing the speed of the refrigeration fan, the humidity inside the refrigeration compartment 211 can be reduced. Thus, when the ambient humidity is high, the humidity of the air entering the refrigeration compartment 211 from the outside can be reduced by adjusting the speed of the refrigeration fan, thereby reducing the risk of condensation.

[0075] Figure 6 is a schematic diagram of the external structure of the back panel of the cold storage compartment. Referring to Figures 4 and 6, the refrigeration evaporator 31 and the refrigeration fan 32 are fixed to the front cover 22 of the cold storage compartment and covered by the rear cover 23 of the cold storage compartment to provide physical protection for the refrigeration evaporator 31 and the refrigeration fan 32. A refrigeration return air vent 332 is provided below the rear cover 23 of the cold storage compartment, and a refrigeration return air channel 334 is provided below the front cover 22 of the cold storage compartment. This allows the air in the cold storage compartment 211 to enter the interior of the rear cover 23 of the cold storage compartment through the refrigeration return air channel 334 and the refrigeration return air vent 332 in sequence. After exchanging heat with the refrigeration evaporator 31 inside, the air flows into the refrigeration fan 32 above and is output to the cold storage compartment 211 by the vortex action of the refrigeration fan, completing the cold air circulation.

[0076] Since there are no auxiliary devices in the above-mentioned refrigerated return air path, the entire refrigerated air circulation relies on the air flow driven by the refrigerated fan. The refrigerated evaporator 31 can reduce the moisture in the air during the condensation process, and the refrigerated evaporator 31 can still maintain the cooling and drying functions for a period of time after the compressor 30 is turned off.

[0077] Therefore, compared with the related technologies that bind the start-up and shutdown of the refrigeration fan and the compressor at the same time, some embodiments of this application can adjust the air flow rate in the refrigeration compartment 211 by changing the speed of the refrigeration fan when the compressor stops working, thereby changing the dryness of the air in the refrigeration compartment 211, reducing the risk of moisture entering the compartment and causing condensation when the external humidity is high, and without the need for additional dehumidification devices, saving the equipment space occupied by the dehumidification device and reducing equipment configuration costs.

[0078] In some embodiments, a refrigerator compartment temperature sensor 41 is also provided on the front cover 22 of the refrigerator compartment, with the front end of the sensor 41 extending into the refrigerator compartment 211. This prevents the temperature of the front cover 22 itself and the air behind it from affecting the actual temperature inside the compartment. It also prevents the terminal wiring from running inside the refrigerator compartment 211, improving its neatness and aesthetics, and protecting the wiring. Referring to Figure 6, a sealing rib 335 is also provided at the refrigerator return air duct 334. The sealing rib 335 is arranged along the X-axis to block the hot air returning after circulation. A return air gap 336 is provided below the refrigerator evaporator 31 so that the return air can be concentrated and input into the refrigerator evaporator 31 along the opening paths of the return air duct 334 and the return air gap 336, improving refrigeration and drying efficiency.

[0079] Figure 7 is a schematic diagram of the front structure of the back panel of the variable temperature compartment and the freezer compartment. Referring to Figures 2 and 6, and in conjunction with Figure 7, the variable temperature compartment 212 includes a front cover 24, on which a variable temperature compartment temperature sensor 42, a variable temperature compartment return air vent 341, and a variable temperature compartment supply air vent 342 are provided. The variable temperature compartment temperature sensor 42 is located near the variable temperature compartment return air vent 341 to avoid the cold air output from the variable temperature compartment supply air vent 342 being too cold and reducing the accuracy of the actual temperature detection inside the variable temperature compartment 212.

[0080] Referring again to Figures 2 and 6, and combining them with Figure 7, the freezer compartment 213 includes a front cover 25, on which a freezer compartment temperature sensor 43, a freezer compartment return air vent 351, and a freezer compartment air supply vent 352 are disposed. In some embodiments, multiple freezer compartment air supply vents 352 are provided to increase the output of cold air. For example, four freezer compartment air supply vents 352 are provided, distributed near the four corners of the freezer compartment front cover 25 to improve cooling efficiency. The freezer compartment temperature sensor 43 is located in the middle to avoid the cold air output from the freezer compartment air supply vents 352 being too cold, which would reduce the accuracy of the actual temperature detection inside the freezer compartment 213. Furthermore, since there are multiple freezer compartment air supply vents 352, the temperature inside the freezer compartment 213 can be quickly reduced, and the temperature difference will not be too large. Therefore, it is not necessary to consider placing the freezer compartment temperature sensor 43 near the freezer compartment return air vent 351.

[0081] In some embodiments, the freezer compartment air outlet 352 is angled upwards, while the freezer compartment return air outlet 351 is an arc-shaped plate with an angled rearward opening. This arc-shaped plate is positioned below the freezer compartment 213 so that after cold air is blown out from the freezer compartment air outlet 352, it circulates downwards within the freezer compartment 213 to the bottom arc-shaped plate. The arc shape faces inwards towards the compressor 30, allowing the circulated air to quickly enter the compressor 30, reducing the airflow distance, minimizing low-temperature refrigeration energy loss, and improving the cooling effect. Furthermore, the arc-shaped plate facilitates air return and also provides space for the compressor 30.

[0082] Figure 8 is a schematic diagram of the rear structure of the back panel of the variable temperature compartment and the freezer compartment; Figure 9 is a schematic diagram of the internal structure of the back panel of the variable temperature compartment and the freezer compartment. Referring to Figures 8 and 9, the rear cover plate 26 of the freezer compartment completely covers the rear of the variable temperature compartment 212 and the freezer compartment 213. A freezer air duct cover foam 27 is provided between the front cover plate 25 and the rear cover plate 26 of the freezer compartment. The freezer air duct cover foam 27 is used to isolate the external environment from the freezer compartment 213, and a freezer air duct is formed through the freezer air duct cover foam 27 to allow cold air to flow to the air outlets 352 of multiple freezer compartments.

[0083] A refrigeration fan 36 is also installed in the refrigeration duct. The refrigeration fan 36 is also called a refrigeration fan. The air outlet side of the refrigeration fan is connected to the air outlet 352 of the refrigeration compartment. The air receiving side of the refrigeration fan is connected to the refrigeration evaporator (which has a similar function and structure to the refrigeration evaporator and is not shown in the figure). The air cooled by the refrigeration evaporator is drawn into the refrigeration duct and discharged into the refrigeration compartment 213 through the air outlet 352 of the refrigeration compartment, so as to realize the air cooling and drying circulation process in the refrigeration compartment 213.

[0084] In some embodiments, a variable temperature compartment electric damper 37 is also provided in the refrigeration air duct. The variable temperature compartment electric damper 37 is used to connect the refrigeration air duct and the variable temperature compartment 212, thereby transporting cold air in the refrigeration air duct to the variable temperature compartment 212. Since the temperature setting of the variable temperature compartment 212 cannot be lower than the temperature setting of the refrigeration compartment 213, the refrigeration air duct can be used directly to cool the variable temperature compartment 212 while maintaining the low temperature state of the refrigeration compartment 213. This allows the compressor 30 to reduce the temperature of both compartments at once, improving the utilization rate of the compressor 30 and reducing the number of times the compressor 30 is started.

[0085] Similar to the refrigeration return air path, the aforementioned refrigeration return air path has no auxiliary devices. The entire refrigeration air circulation relies on the airflow driven by the refrigeration fan. The evaporator reduces moisture in the air during condensation, and continues to provide cooling and drying functions for a period after the compressor 30 is turned off. Therefore, compared to related technologies that simultaneously link the start-up and shutdown of the fan and compressor, this application can adjust the airflow speed in the refrigeration compartment 213 and the variable temperature compartment 212 by changing the refrigeration fan speed when the compressor stops working. This alters the dryness of the air in the refrigeration compartment 213 and the variable temperature compartment 212, reducing the risk of condensation when moisture enters the compartments due to high ambient humidity. Furthermore, it eliminates the need for additional dehumidification devices, saving space and reducing equipment costs, thereby enhancing the product's market competitiveness.

[0086] Because the refrigerator door cannot completely close to the target compartment, in high humidity conditions, humid air from outside may enter the target compartment through the door gaps, causing condensation near the door. Over time, this condensation can frost or ice over low temperatures, affecting the door's closure and exacerbating the frost and ice buildup. Condensation can also form on the rear air duct cover and other areas, eventually frost or ice up to 5mm thick, which is difficult to remove manually. This can affect the drawer's sliding motion, preventing it from closing, and may also block the air ducts, reducing the refrigerator's cooling efficiency, increasing compressor usage, and increasing energy consumption.

[0087] It should be noted that the compressor 30, the refrigeration evaporator 31, and the freezing evaporator (not shown in the figure) in some of the above embodiments together constitute the refrigeration system of the refrigerator, which can be used to reduce the temperature of the target compartment inside the refrigerator.

[0088] The following explanation uses the refrigerator's control device as the implementing entity to illustrate how the refrigerator controls condensation. The specific embodiments described below can be combined with each other; similar or identical concepts or processes may not be repeated in some embodiments.

[0089] Figure 10 is a flowchart illustrating a refrigerator control method according to some embodiments of this application. Figure 13 is a schematic block diagram illustrating a refrigerator according to some embodiments of this application. As shown in Figure 13, the refrigerator 100 includes:

[0090] The refrigeration system 60 is configured to reduce the temperature of the target compartment inside the refrigerator 100;

[0091] Temperature sensor 70 is configured to detect the temperature of the target compartment inside the refrigerator;

[0092] Fan 80 is configured to drive airflow within the target compartment of the refrigerator;

[0093] The control device 90 is connected to the refrigeration system 60, the temperature sensor 70, and the fan 80, respectively.

[0094] In some embodiments, the refrigerator 100 further includes a second humidity sensor 51, which is disposed in a target compartment of the refrigerator 100 and configured to detect the humidity of the target compartment within the refrigerator 100.

[0095] In some embodiments, the target compartment can be any of a refrigerator compartment, a variable temperature compartment, and a freezer compartment. Temperature sensor 70 includes one or more of a refrigerator compartment temperature sensor 41, a variable temperature compartment temperature sensor 42, and a freezer compartment temperature sensor 43. First humidity sensor 50 is an external humidity sensor, while second humidity sensor 51 is an internal humidity sensor.

[0096] As shown in Figure 10, the method includes the following steps: via control device 90,

[0097] S101. When the cooling system 60 and fan 80 are off and the temperature of the target room is lower than the dew point temperature, obtain the humidity of the ambient air.

[0098] The control methods in some embodiments of this application are primarily aimed at control methods during the shutdown of the refrigeration system, i.e., when both the compressor and fan are stopped. Since the compressor stops operating based on the detection that the refrigerator temperature has dropped to the temperature at which the refrigeration system was shut down, the refrigerator will not continue cooling, and therefore there is no need to use the fan to achieve the air-cooling circulation effect. Therefore, existing refrigerators also synchronously stop fan operation when the compressor stops to save energy. Furthermore, the fan and compressor are the main sources of noise in the refrigerator; therefore, shutting them down completely after reaching the cooling condition also helps reduce the noise generated by fan and compressor operation. To reduce the risk of condensation in the refrigerator by utilizing the fan, in addition to shutting down the refrigeration system and fan as mentioned above, the fan's start-up timing can be determined to minimize energy loss caused by fan operation, avoiding noise pollution, energy loss, and reduced fan lifespan caused by the refrigerator fan being in a running state for extended periods. The fan's start-up timing is mainly determined by the dew point temperature.

[0099] The conditions for condensation to form inside a refrigerator vary depending on the temperature and humidity. Therefore, when using the dew point temperature, it is necessary to first obtain the dew point temperature under the current temperature and humidity conditions in the target room. The dew point temperature is obtained based on the preset temperature and humidity correspondence table and dew point temperature shown in Table 1 below.

[0100] Table 1 Correspondence between Temperature, Humidity and Dew Point Temperature

[0101] As shown in Table 1 above, under the same temperature conditions, the dew point temperature of the refrigerator gradually increases with the increase of humidity inside. That is, in a high-humidity environment, condensation will occur once the temperature drops slightly below the dew point temperature. If the surface temperature continues to drop, frost or ice may form. Similarly, under the same humidity conditions, the higher the temperature, the higher the dew point temperature. However, since the fan and compressor start simultaneously when the temperature decreases, dehumidification can be achieved while cooling. Therefore, it is necessary to pay close attention to changes in humidity. Furthermore, since the refrigerator door is not completely isolated from the outside environment, moisture from the ambient air can enter the refrigerator through gaps in the door. When the internal temperature is low, the entering humid air increases the humidity near the door, making it prone to condensation when it cools down. Therefore, it is necessary to obtain the humidity of the air around the refrigerator to determine how to prevent condensation based on the humidity level.

[0102] S102. When the ambient air humidity exceeds the preset humidity, while keeping the cooling system 60 off, the fan 80 is turned on at a fan speed that is positively correlated with the ambient air humidity.

[0103] In some embodiments, when the ambient air humidity is too high, the air entering the target compartment of the refrigerator only increases the humidity of the target compartment, but before reaching the cooling start point of the target compartment, the refrigeration system will not start. However, the fan can be started to circulate the moisture in the target compartment with the condenser to reduce the air humidity in the target compartment, thereby reducing the risk of condensation in the target compartment.

[0104] In some embodiments, the preset humidity includes a preset first humidity and a preset second humidity. Turning on the fan at a fan speed positively correlated with the ambient air humidity includes the following situations:

[0105] Case 101:

[0106] When the ambient air humidity exceeds the preset first humidity, the fan in the target room is controlled to run at the first speed.

[0107] For example, when the refrigerator's cooling system is working normally, the fan speed is 900 rpm. The preset initial humidity is 50%. When the ambient air humidity exceeds 50%, such as reaching 70%, it is considered a high humidity situation. The fan speed can be adjusted to 1000 rpm, which is an increase of 100 rpm, thereby accelerating the dehumidification process.

[0108] Case 102:

[0109] When the ambient air humidity exceeds a preset second humidity level but does not exceed a preset first humidity level, the fan in the target room is controlled to operate at a second speed.

[0110] For example, when the refrigerator's cooling system is working normally, the fan speed is 900 rpm. The preset first humidity is 50%. When the ambient air humidity exceeds 30% but does not exceed 50%, it is considered a moderate humidity situation. The fan speed can be adjusted to 700 rpm, which is 200 rpm lower. This meets the current dehumidification needs without generating excessive noise due to the high speed.

[0111] Case 103:

[0112] When the ambient air humidity is lower than the preset second humidity, the fan in the target room operates at the third speed.

[0113] In some embodiments, the first rotational speed, the second rotational speed, and the third rotational speed are different from each other. In some embodiments, the second rotational speed is less than the first rotational speed, and the third rotational speed is less than the second rotational speed. In some embodiments, the third rotational speed in the above cases can be set to zero.

[0114] For example, when the refrigerator's cooling system is working normally, the fan speed is 900 rpm. When the preset initial humidity is 50%, and the ambient air humidity does not exceed 30%, the air is relatively dry. At this time, there is no need to perform dehumidification operation, so the fan can be left running. That is, the fan speed is zero, so that the external environment will not bring moisture to the target room. Therefore, the fan will not be used to reduce the humidity of the target room, avoiding ineffective fan operation, reducing the energy consumption of the fan, and extending the fan's service life.

[0115] Some embodiments of this application adjust the fan speed according to different ambient humidity levels during the non-cooling period of the refrigerator, so as to minimize the impact of outside air on the humidity of the target room, thereby reducing the risk of condensation in the target room. Different speeds are set according to different humidity levels to control the operation of the fan, thereby reducing energy consumption and noise while achieving humidity reduction.

[0116] Even when the ambient air humidity has little impact on the target room, the different stored items within the target room can still affect its humidity. For example, if the target room is a refrigerator, fresh produce such as vegetables may continue to release moisture into the refrigerator even after the refrigeration system has shut off, resulting in higher humidity. In this case, humidity control within the refrigerator is necessary. The following is one feasible control method.

[0117] Figure 11 is a flowchart illustrating another refrigerator control method provided in some embodiments of this application. As shown in Figure 11, the method includes the following steps: using control device 90,

[0118] S111. When the ambient air humidity is lower than the preset second humidity and the cooling system 60 and fan 80 are turned off, obtain the humidity of the target room.

[0119] In some embodiments, a situation where the ambient air humidity is lower than a preset second humidity level is considered a low ambient air humidity situation, and in this case, it is not necessary to start or adjust the fan speed based on the ambient air humidity. However, if the humidity in the target room continuously increases due to the presence of stored items, and the target room temperature has not yet reached the refrigeration system's start-up temperature, the timing of fan startup can be determined based on the target room humidity level. Therefore, it is necessary to obtain the humidity of the target room.

[0120] S112. Determine the dew point temperature of the target room based on the temperature and humidity of the target room.

[0121] S113. When the temperature of the target room is lower than the dew point temperature, while keeping the cooling system 60 off, turn on the fan 80.

[0122] The determination of dew point temperature and the operation of starting the fan when the temperature is below the dew point in steps S112-S113 of some embodiments of this application are similar to the determination of dew point temperature and the determination of fan start-up timing in Table 1 of some embodiments above. Some embodiments of this application will not be described again here.

[0123] Some embodiments of this application analyze conditions when the external humidity is low to determine that the factor affecting condensation is the change in humidity inside the refrigerator. This change in internal humidity is primarily related to the items stored in the target compartment. Therefore, by detecting the humidity inside the target compartment, it can be indirectly determined whether there are items stored there that can quickly increase the humidity. If so, dehumidification needs to be accelerated by starting the fan while maintaining the dew point temperature. This achieves the function of jointly controlling dehumidification of the refrigerator's target compartment environment from both inside and outside, further reducing the risk of condensation, frost, and ice formation inside the target compartment.

[0124] For a refrigerator capable of interacting with a user, the refrigerator may also be equipped with interactive components, which may include: function buttons and / or a voice acquisition component and / or a communication module. In some embodiments, the function buttons are configured to acquire the indication signal corresponding to the user's button operation after being triggered by the user. The voice acquisition component is configured to collect the user's voice input. The communication module is configured to transmit signals to a terminal device associated with the refrigerator. Therefore, for a refrigerator with interactive components, the refrigerator can be functionally configured to support multiple control modes, with different control modes corresponding to at least different fan operating durations.

[0125] For refrigerators that support multiple control modes, some embodiments of this application can also control the refrigerator using the following methods, and some embodiments are illustrated with two control modes.

[0126] Figure 12 is a flowchart illustrating another refrigerator control method provided in some embodiments of this application. As shown in Figure 12, the method includes the following steps: using control device 90,

[0127] S121. When the cooling system 60 and fan 80 are off and the temperature of the target room is lower than the dew point temperature, obtain the control mode selected by the user and the air humidity of the external environment.

[0128] In some embodiments, the control mode selected by the user includes the following acquisition methods:

[0129] Method 1: Obtain the control mode selected by the user through the operation function keys.

[0130] Method 2: Obtain the control mode selected by the user through voice input.

[0131] Method 3: Obtain the selected control mode sent by the user through a terminal device associated with the refrigerator.

[0132] S122. Determine the target runtime of fan 80 based on the control mode selected by the user.

[0133] In some embodiments, the multiple control modes include a first control mode and a second control mode; the operating time of the fan in the first control mode is greater than the operating time of the fan in the second control mode. Specifically, the target operating time of the fan during dehumidification in the first control mode is a first duration, and the target operating time of the fan during dehumidification in the second control mode is a second duration, wherein the first duration is greater than the second duration, for example, the first duration is 60 minutes and the second duration is 20 minutes.

[0134] It should be noted that since refrigerators may operate under conditions that allow the fan to run for extended periods, continuously keeping the fan running can cause the motor to overheat, significantly reducing the fan's lifespan. It also affects the internal temperature of the refrigerator, increases the frequency of the refrigeration system's operation, and cannot completely guarantee against condensation. Therefore, the fan is set to a periodic start-stop cycle, meaning the first and second time periods mentioned above constitute one cycle. This allows the fan sufficient cooling and rest time while maintaining the anti-condensation effect without significantly reducing its effectiveness, thus extending its lifespan.

[0135] S123. When the ambient air humidity exceeds the preset humidity, while keeping the cooling system off, the fan 80 is turned on according to the target running time corresponding to the first control mode or the second control mode.

[0136] In some embodiments, when the user selects the first control mode, and the preset humidity includes a preset first humidity and a preset second humidity, the fan is activated according to the target runtime corresponding to the first control mode, including the following cases:

[0137] Situation 121:

[0138] When the ambient air humidity exceeds the preset first humidity, the fan in the target room is controlled to run at the first speed for the first duration.

[0139] For example, when the refrigerator's cooling system is working normally, the fan speed is 900 rpm. The preset initial humidity is 50%. When the ambient air humidity exceeds 50%, such as reaching 70%, it is considered a high humidity situation. The fan speed can be adjusted to 1000 rpm and run at 1000 rpm for 60 minutes, then stop for 60 minutes and start again. This cycle is repeated until the fan's starting conditions are not met, thereby improving the dehumidification effect.

[0140] Situation 122:

[0141] When the ambient air humidity exceeds the preset second humidity but does not exceed the preset first humidity, the fan in the target room is controlled to run at the second speed for a first duration.

[0142] For example, when the refrigerator's cooling system is working normally, the fan speed is 900 rpm. The preset initial humidity is 50%. When the ambient air humidity exceeds 30% but does not exceed 50%, which is considered a moderate humidity situation, the fan speed can be adjusted to 700 rpm and run at 700 rpm for 60 minutes, then stop for 60 minutes and start again. This cycle can be repeated until the fan's starting conditions are not met, thus ensuring effective dehumidification without generating excessive noise due to the high speed.

[0143] In another embodiment, when the user selects the second control mode, and the preset humidity includes a preset first humidity and a preset second humidity, the fan is activated according to the target runtime corresponding to the second control mode, including the following situations:

[0144] Situation 123:

[0145] When the ambient air humidity exceeds the preset first humidity, the fan in the target room is controlled to run at the first speed for a second duration.

[0146] For example, when the refrigerator's cooling system is working normally, the fan speed is 900 rpm. The preset initial humidity is 50%. When the ambient air humidity exceeds 50%, such as reaching 70%, it is considered a high humidity situation. The fan speed can be adjusted to 1000 rpm and run at 1000 rpm for 20 minutes, then stop for 60 minutes and start again. This cycle is repeated until the fan's starting conditions are not met, thereby improving the dehumidification effect.

[0147] Case 124:

[0148] When the ambient air humidity exceeds a preset second humidity but does not exceed a preset first humidity, the fan in the target room is controlled to run at a second speed for a second duration.

[0149] In some embodiments, the first rotational speed and the second rotational speed are different from each other. In some embodiments, the second rotational speed is less than the first rotational speed.

[0150] For example, when the refrigerator's cooling system is working normally, the fan speed is 900 rpm. The preset initial humidity is 50%. When the ambient air humidity exceeds 30% but does not exceed 50%, which is considered a moderate humidity situation, the fan speed can be adjusted to 700 rpm and run at 700 rpm for 20 minutes, then stop for 60 minutes and start again. This cycle can be repeated until the fan's starting conditions are not met, thus ensuring effective dehumidification without generating excessive noise due to the high speed.

[0151] Some embodiments of this application further define the anti-condensation method for refrigerators that can interact with users, balance the relative relationship between dehumidification performance and energy saving, enrich the functionality of refrigerators from the user's perspective, expand the scope of applicable user groups, and improve the user's experience.

[0152] In some embodiments, when the target compartment of the refrigerator is opened, the fan inside the target compartment is turned on.

[0153] In some embodiments, this method is independent of humidity detection; that is, the fan operation can be controlled based solely on the opening / closing status of the target compartment door. This method can be combined with humidity detection to control fan operation, or it can control fan operation independently. By turning on the fan, a dry positive pressure state is maintained inside the target compartment, thereby reducing the residence time of moisture from the outside environment in the target compartment, and thus reducing condensation caused by hot air from the outside environment remaining in the cold target compartment after the door is opened.

[0154] It should be noted that in some embodiments of this application, the fan's operating duration can be set based on the opening and closing time interval of the target room, or it can be a preset duration unrelated to the opening and closing time interval. For example, a third duration that is the same as the opening and closing time interval of the target room, a fourth duration that is greater than the opening and closing time interval of the target room, or a fifth duration that is less than the opening and closing time interval of the target room. Linking the fan's operating duration when the target room is open to the opening and closing time interval allows for more intelligent control of the fan's runtime, improving the dehumidification effect. Fixing the fan's start-up duration after the door is opened reduces the impact on the fan operation control based on humidity conditions in the above embodiments, making it easier to combine with the above embodiments to further improve the humidity in the target room.

[0155] Some embodiments of this application also provide a computer-readable storage medium, which may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0156] The computer-readable storage medium stores program instructions for use in the anti-condensation control method described in the above embodiments. Some embodiments of this application also provide a computer program product including executable instructions stored in the readable storage medium. At least one control module of the refrigerator can read the executable instructions from the readable storage medium, and the at least one control module executes the executable instructions to cause the refrigerator to implement the anti-condensation control method provided in the various embodiments described above.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. For ease of explanation, the above description has been combined with specific implementation methods. However, the above exemplary discussion is not intended to be exhaustive or to limit the implementation methods to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above implementation methods are for better explanation of the principles and practical applications, so that those skilled in the art can better use the described implementation methods and various different variations of implementation methods suitable for specific use considerations.

Claims

1. A refrigerator, comprising: The refrigeration system is configured to reduce the temperature of the target compartment inside the refrigerator; A temperature sensor configured to detect the temperature of the target compartment inside the refrigerator; A fan configured to drive airflow within the target compartment of the refrigerator; The control device is connected to the refrigeration system, the temperature sensor, and the fan respectively, and is configured as follows: When the refrigeration system and the fan are off, and the temperature of the target room is below the dew point temperature, the humidity of the external environment is obtained; When the ambient air humidity exceeds a preset humidity, the cooling system remains off while the fan is turned on at a speed positively correlated with the ambient air humidity.

2. The refrigerator according to claim 1, wherein, The preset humidity includes a preset first humidity and a preset second humidity; the control device is configured as follows: When the ambient air humidity exceeds the preset first humidity, the fan in the target room is controlled to run at a first speed. When the ambient air humidity exceeds the preset second humidity but does not exceed the preset first humidity, the fan in the target room is controlled to operate at a second speed; the second humidity is less than the first humidity. When the ambient air humidity is lower than the preset second humidity, the fan in the target room is controlled to run at the third speed. The first rotational speed, the second rotational speed, and the third rotational speed are different from each other.

3. The refrigerator according to claim 2, wherein, The second rotational speed is less than the first rotational speed, and the third rotational speed is less than the second rotational speed.

4. The refrigerator according to claim 2, wherein, The third rotational speed is zero.

5. The refrigerator according to claim 4, further comprising: A humidity sensor is disposed in the target compartment of the refrigerator and configured to detect the humidity of the target compartment inside the refrigerator. The control device is further configured to: The humidity of the target room is obtained when the ambient air humidity is lower than the preset second humidity and the cooling system and the fan are turned off. The dew point temperature of the target room is determined based on the temperature and humidity of the target room. When the temperature in the target room is lower than the dew point temperature, the cooling system is kept off while the fan is turned on.

6. The refrigerator according to claim 1, wherein, The refrigerator also supports multiple control modes, with different fan operating times corresponding to different control modes. The control device is further configured as follows: When the cooling system and the fan are off, and the temperature of the target room is below the dew point temperature, the user-selected control mode and the ambient air humidity are obtained. The target runtime of the fan is determined based on the control mode selected by the user. When the ambient air humidity exceeds the preset humidity, the cooling system remains off while the fan is turned on for the target operating time.

7. The refrigerator according to claim 6, wherein, The multiple control modes include a first control mode and a second control mode; the operating time of the fan in the first control mode is greater than the operating time of the fan in the second control mode; the control device is configured as follows: When the ambient air humidity exceeds the preset humidity, the cooling system remains off while the fan is turned on according to the target operating time corresponding to the first control mode or the second control mode.

8. The refrigerator according to any one of claims 1-7, wherein, The control device is also configured to: When the target compartment of the refrigerator is opened, the fan inside the target compartment is turned on.

9. A method for controlling a refrigerator, wherein, The refrigerator includes: The refrigeration system is configured to reduce the temperature of the target compartment inside the refrigerator; A temperature sensor configured to detect the temperature of the target compartment inside the refrigerator; A fan configured to drive airflow within the target compartment of the refrigerator; The control device is connected to the refrigeration system, the temperature sensor, and the fan, respectively. The method includes: using the control device. When the refrigeration system and the fan are off, and the temperature of the target room is below the dew point temperature, the humidity of the external environment is obtained; When the ambient air humidity exceeds a preset humidity, the cooling system remains off while the fan is turned on at a speed positively correlated with the ambient air humidity.

10. The control method according to claim 9, wherein, The preset humidity includes a preset first humidity and a preset second humidity; the method includes: through the control device... When the ambient air humidity exceeds the preset first humidity, the fan in the target room is controlled to run at a first speed. When the ambient air humidity exceeds the preset second humidity but does not exceed the preset first humidity, the fan in the target room is controlled to run at the second speed. When the ambient air humidity is lower than the preset second humidity, the fan in the target room is controlled to run at the third speed. The first rotational speed, the second rotational speed, and the third rotational speed are different from each other.

11. The refrigerator according to claim 10, wherein, The second rotational speed is less than the first rotational speed, and the third rotational speed is less than the second rotational speed.

12. The refrigerator according to claim 10, wherein, The third rotational speed is zero.

13. The refrigerator according to claim 9, wherein, The refrigerator's target compartment is also equipped with a humidity sensor, and the method further includes: using the control device... The humidity of the target room is acquired when the cooling system and the fan are turned off; The dew point temperature of the target room is determined based on the temperature and humidity of the target room. When the temperature in the target room is lower than the dew point temperature, the cooling system is kept off while the fan is turned on.

14. The refrigerator according to claim 9, wherein, The refrigerator also supports multiple control modes, and the operating time of at least the fan varies depending on the control mode. The method further includes: using the control device... When the cooling system and the fan are off, and the temperature of the target room is below the dew point temperature, the user-selected control mode and the ambient air humidity are obtained. The target runtime of the fan is determined based on the control mode selected by the user. When the ambient air humidity exceeds the preset humidity, the cooling system remains off while the fan is turned on for the target operating time.

15. The refrigerator according to claim 14, wherein, The multiple control modes include a first control mode and a second control mode; the operating time of the fan in the first control mode is greater than the operating time of the fan in the second control mode; the method includes: using the control device, when the ambient air humidity exceeds a preset humidity, keeping the cooling system off while turning on the fan according to the target operating time corresponding to the first control mode or the second control mode.

16. The refrigerator according to claim 9, further comprising: When the target compartment of the refrigerator is opened, the fan inside the target compartment is turned on by the control device.

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