Air-cooled refrigerator and control method

Abstract

The application provides a forced air cooling refrigerator and a control method. The forced air cooling refrigerator comprises at least one refrigeration chamber, a refrigeration door body connected with the refrigeration chamber, a refrigeration temperature sensor arranged in the refrigeration chamber, a communication module arranged on the refrigeration door body, and a controller electrically connected with a refrigerator refrigerating system, wherein the refrigerator refrigerating system comprises a compressor and a refrigeration fan for controlling the temperature of the refrigeration chamber. When the refrigerator is refrigerated, external air can enter the refrigeration chamber by arranging the communication module on the refrigeration door body, so that the relative humidity of the refrigeration chamber is increased, and the problems of low humidity and high energy consumption of the refrigeration chamber of the forced air cooling refrigerator are solved.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, specifically to an air-cooled refrigerator and its control method. Background Technology

[0002] Frost-free refrigerators are favored by consumers for their frost-free nature and ease of maintenance. Frost-free single-cycle refrigerators have a simple design, using a unified cooling system to provide cold air to both the refrigerator and freezer compartments. However, this design often results in excessively low relative humidity in the refrigerator compartment, with an average unloaded humidity of approximately 20%–30% RH, which is detrimental to the preservation of fruits and vegetables that require a high humidity environment.

[0003] The limited humidity control of single-system air-cooled refrigerators restricts their effectiveness in food preservation. Low humidity environments can cause food to lose moisture quickly and dry out, affecting its freshness and taste. While humidity sensors and humidification modules can be installed to regulate humidity in the refrigerator compartment, this method is often complex, costly, and occupies storage space, thus impacting user experience and energy efficiency. Summary of the Invention

[0004] This application provides a frost-free refrigerator and a control method to solve the problem of high energy consumption when increasing humidity in the refrigerator compartment.

[0005] In a first aspect, this application provides an air-cooled refrigerator, comprising:

[0006] At least one cold storage compartment and a cold storage door connected to the cold storage compartment; a cold storage temperature sensor is provided in the cold storage compartment;

[0007] At least one freezer compartment, wherein the freezer compartment is equipped with a freezer temperature sensor;

[0008] A connecting module is installed on the refrigerator door;

[0009] A controller electrically connected to a refrigerator refrigeration system, the refrigeration system including a compressor, a refrigeration fan, and an evaporator for controlling the temperature of the refrigerator compartment;

[0010] The evaporator is located between the refrigerator compartment and the freezer compartment.

[0011] The controller is configured to:

[0012] The temperature of the refrigerator compartment detected by the refrigeration temperature sensor is obtained;

[0013] If the temperature of the refrigerator compartment meets the first preset condition, then the compressor and the refrigeration fan are controlled to run at the first speed until the temperature of the refrigerator compartment meets the preset refrigeration temperature;

[0014] Obtain the freezer compartment temperature detected by the freezer temperature sensor;

[0015] If the freezer temperature meets the second preset condition, then the compressor and the refrigeration fan are controlled to run at the second speed until the refrigerator compartment meets the preset freezer temperature.

[0016] Optionally, the communication module includes an inner protective cover, a through pipe, and an outer protective cover. The through pipe includes a first opening and a second opening. The first opening is disposed on the outer surface of the refrigerator door, and the second opening is disposed on the inner surface of the refrigerator. The outer protective cover is rotatably connected to the first opening, and the inner protective cover is rotatably connected to the second opening.

[0017] Optionally, a refrigeration damper is also included, and the controller is further configured to control the opening of the refrigeration damper when the refrigeration fan is running at a first speed.

[0018] Optionally, it also includes a defrost heater, which is connected to the evaporator in the refrigeration system;

[0019] The controller is also configured to:

[0020] Obtain the evaporator temperature detected by the defrosting sensor;

[0021] If the evaporator temperature is lower than the preset evaporation temperature, the defrosting heater is controlled to start for a preset time.

[0022] Optionally, the controller is further configured to:

[0023] Obtain the cumulative operating time of the refrigeration fan and the compressor;

[0024] If the cumulative running time is greater than the preset cumulative time, then the defrosting heater is controlled to start for the preset time.

[0025] Optionally, the preset conditions are: the temperature of the refrigerator compartment is greater than the preset refrigerator temperature and the temperature of the evaporator is greater than the preset evaporation temperature.

[0026] Secondly, this application also provides a method for controlling a frost-free refrigerator, applied to the frost-free refrigerator provided in the first aspect above, comprising:

[0027] Obtain the temperature of the refrigerator compartment detected by the refrigeration temperature sensor;

[0028] If the temperature of the refrigerator compartment meets the first preset condition, the compressor and refrigeration fan are controlled to run at the first speed until the temperature of the refrigerator compartment meets the preset refrigeration temperature.

[0029] Obtain the freezer compartment temperature detected by the freezer temperature sensor;

[0030] If the temperature of the freezer compartment meets the second preset condition, the compressor and the refrigeration fan are controlled to run at the second speed until the freezer compartment meets the preset freezing temperature.

[0031] Optionally, the method further includes:

[0032] Obtain the evaporator temperature detected by the defrost sensor;

[0033] If the evaporator temperature is lower than the preset evaporation temperature, the defrosting heater is controlled to start for a preset time.

[0034] Optionally, the method further includes:

[0035] Obtain the cumulative operating time of the refrigeration fan and the compressor;

[0036] If the cumulative running time is greater than the preset cumulative time, then the defrosting heater is controlled to start for the preset time.

[0037] As can be seen from the above technical solutions, this application provides a frost-free refrigerator and a control method. The frost-free refrigerator includes: at least one refrigerator compartment and a refrigerator door connected to the refrigerator compartment; a refrigerator temperature sensor is provided in the refrigerator compartment; a communication module is provided in the refrigerator door; and a controller electrically connected to the refrigerator refrigeration system, the refrigeration system including a compressor and a refrigeration fan for controlling the refrigerator compartment temperature; the controller is configured to: acquire the refrigerator compartment temperature detected by the refrigerator temperature sensor; if the refrigerator compartment temperature meets a first preset condition, control the compressor and the refrigeration fan to run at a first speed; until the refrigerator compartment temperature meets a preset refrigerator temperature; acquire the freezer compartment temperature detected by the freezer temperature sensor; if the freezer compartment temperature meets a second preset condition, control the compressor and the refrigeration fan to run at a second speed; until the freezer compartment meets a preset freezer temperature. By placing the connecting module on the refrigerator door, close to the refrigerator return air vent, the negative pressure at the return air vent allows outside air to enter the refrigerator compartment through the connecting module when the refrigerator is cooling, increasing the relative humidity of the refrigerator compartment and solving the problem of low humidity and high energy consumption in air-cooled refrigerators. Attached Figure Description

[0038] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A front view of a frost-free refrigerator provided in an embodiment of this application;

[0040] Figure 2Another front view of an air-cooled refrigerator provided in an embodiment of this application;

[0041] Figure 3 A side sectional view provided for an embodiment of this application;

[0042] Figure 4 This is a flowchart of the defrosting mode of a frost-free refrigerator provided in an embodiment of this application;

[0043] Figure 5 A flowchart illustrating the cooling mode of an air-cooled refrigerator provided in an embodiment of this application.

[0044] Figure label:

[0045] Among them, 1-refrigeration compartment; 11-refrigeration door; 12-refrigeration temperature sensor; 2-freezer compartment; 21-freezer temperature sensor; 3-connection module; 31-inner protective cover; 32-through pipe; 33-outer protective cover; 4-controller; 5-refrigeration fan; 6-evaporator; 61-defrost sensor; 62-defrost heater; 7-refrigeration damper; 8-refrigeration return air vent. Detailed Implementation

[0046] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0047] The most crucial component of a frost-free refrigerator is the cooling fan, typically located at the top or bottom. The cooling fan is responsible for evenly distributing cold air throughout the refrigerator and freezer compartments, ensuring a consistent temperature in all corners. Additionally, the evaporator is a key component for frost-free cooling. It is usually located on one side inside the refrigerator, working in conjunction with the cooling fan to quickly absorb heat and transfer it to the outside. Thanks to the cooling fan, frost-free refrigerators have an automatic defrosting function, eliminating the need for manual defrosting and improving ease of use.

[0048] However, the working principle of a frost-free refrigerator leads to lower humidity in the refrigerator compartment. While the cooling fan circulates cold air, it also accelerates the evaporation of moisture from food, resulting in lower relative humidity inside the refrigerator. This low humidity environment can cause some foods that require higher humidity for preservation, such as fruits and vegetables, to easily dehydrate and spoil. Therefore, in some implementations, frost-free refrigerators are equipped with humidity sensors, humidification modules, and water storage bottles. Humidification in the refrigerator compartment is achieved by using a humidification box to collect water from the air. However, this method of humidifying by using a humidification box takes up more refrigerator space, and the cooling fan and humidification module consume electricity. Furthermore, to maintain a constant temperature, the cooling fan needs to run continuously, increasing the overall energy consumption of the frost-free refrigerator.

[0049] To address the issue of increased energy consumption when increasing humidity in the refrigerator compartment of a frost-free refrigerator, see [link / reference]. Figures 1-3 This application provides an air-cooled refrigerator, including:

[0050] At least one refrigerator compartment 1 and a refrigerator door 11 connected to the refrigerator compartment 1; a refrigerator temperature sensor 12 is provided inside the refrigerator compartment 1. At least one freezer compartment 2, the freezer compartment 2 is provided with a freezer temperature sensor 21; wherein, the refrigerator temperature sensor 12 can detect the temperature inside the refrigerator compartment 1, and the freezer temperature sensor 21 can detect the temperature inside the freezer compartment 2. Through the refrigerator temperature sensor 12 and the freezer temperature sensor 21, it is convenient to detect the temperature of the refrigerator compartment 1 and the freezer compartment. By obtaining the refrigerator compartment temperature and the freezer compartment temperature, it is convenient to control the speed of the refrigeration fan 5, so as to realize the temperature control of the refrigerator compartment 1 and the freezer compartment 2.

[0051] The connecting module 3 is installed in the refrigerator door 11;

[0052] The controller 4 is electrically connected to the refrigerator's refrigeration system, which includes a compressor for controlling the temperature of the refrigerator compartment, a refrigeration fan 5, and an evaporator 6. The evaporator 6 is located between the refrigerator compartment 1 and the freezer compartment 2. In a frost-free refrigerator, hot air flows through the built-in evaporator 6. Because the air temperature is higher than that of the evaporator 6, heat exchange occurs, causing the air temperature to drop. This cold air is then blown into the refrigerator, continuously circulating to lower the refrigerator's temperature. During the refrigeration process, water vapor in the air may condense and frost onto the evaporator 6. To address the defrosting issue of the evaporator 6, frost-free refrigerators are typically equipped with a heating device to periodically melt the frost on the evaporator 6, ensuring the normal operation of the refrigeration system.

[0053] After the refrigeration fan 5 is running, it will drive cold air to circulate inside the refrigerator. At this time, with the flow of cold air, the evaporation of moisture in the stored food will be accelerated. Therefore, a connecting module 3 is set in the refrigerator door 11 to connect the inside of the refrigerator compartment 1 with the outside of the refrigerator. The evaporator 6 is set at the crossbeam between the refrigerator compartment 1 and the freezer compartment 2, so that outside air can enter the refrigerator compartment 1 during the operation of the evaporator 6 and the refrigeration fan 5, increasing the humidity inside the refrigerator compartment 1, without the need to add other devices.

[0054] Meanwhile, the evaporator 6 is located between the refrigerator compartment 1 and the freezer compartment 2. During the shutdown phase of the evaporator 6, the evaporator 6 recovers temperature slowly. Combined with the defrosting characteristics, the start-up time of the refrigeration fan 5 and the compressor is controlled to achieve energy-saving effect.

[0055] Controller 4 is configured as follows:

[0056] The temperature of the refrigerator compartment detected by the refrigeration temperature sensor 12 is obtained;

[0057] If the refrigerator compartment temperature meets the first preset condition, then control the compressor and refrigeration fan 5 to run at the first speed until the refrigerator compartment temperature meets the preset refrigerator temperature;

[0058] Obtain the freezer compartment temperature detected by the freezer temperature sensor 21;

[0059] If the freezer temperature meets the second preset condition, the compressor and refrigeration fan 5 are controlled to run at the second speed until the freezer meets the preset freezing temperature.

[0060] When the controller 4 detects that the temperature of the refrigerator compartment detected by the refrigerator temperature sensor 12 meets the first preset condition, the controller 4 will control the compressor and the refrigeration fan 5 to run at the first speed to refrigerate the refrigerator compartment 1. When the refrigeration fan 5 runs at the first speed, it operates at a low speed, with a low speed range of 800-1200 RPM. The temperature of the refrigerator compartment will continuously decrease as cold air circulates. Because the temperature of the refrigerator compartment 1 is lower than the ambient temperature, it can maintain a positive pressure state inside the refrigerator compartment 1. A small amount of low-temperature, low-humidity gas will seep out through the door seal and communication module 3 of the refrigerator compartment 1.

[0061] Once the refrigerator compartment temperature meets the preset refrigerator temperature and the controller 4 obtains that the freezer compartment temperature detected by the freezer temperature sensor 21 meets the second preset condition, the controller 4 will control the compressor and refrigeration fan 5 to operate at the second speed to cool the freezer compartment 2. Since the temperature requirement of the freezer compartment 2 is lower than that of the refrigerator compartment 1, the refrigeration fan 5 operates at a high speed when running at the second speed. The high speed range of the refrigeration fan 5 is 1600-2000 RPM. When the refrigeration fan 5 is running at high speed, the temperature inside the freezer compartment is lower than the temperature inside the refrigerator compartment. Therefore, once the freezer compartment meets the preset freezing temperature, it meets the usage conditions.

[0062] It is understandable that when the area near the refrigerated return air vent 8 is under negative pressure, the pressure difference between the inside of the refrigerated compartment 1 and the outside atmosphere is inconsistent, which allows outside air to enter the refrigerated compartment 1 through the connecting module 3, thereby increasing the humidity inside the refrigerated compartment 1.

[0063] In some embodiments, such as Figure 2 As shown, the connecting module 3 includes an inner protective cover 31, a connecting pipe 32, and an outer protective cover 33. The connecting pipe 32 includes a first opening and a second opening. The first opening is located on the outer surface of the refrigerator door 11, and the second opening is located on the inner surface of the refrigerator compartment 1. The outer protective cover 33 is rotatably connected to the first opening, and the inner protective cover 31 is rotatably connected to the second opening.

[0064] The connecting pipe 32 is an L-shaped tubular structure with both ends open, connecting the internal gas environment of the refrigerator compartment 1 and the external gas environment of the refrigerator. External gas can enter the connecting pipe 32 through the first opening and then enter the refrigerator compartment 1 through the second opening. Conversely, gas inside the refrigerator compartment 1 can enter the connecting pipe 32 through the second opening and then exit the refrigerator through the first opening, thus achieving gas exchange between the refrigerator compartment 1 and the external environment when the refrigerator door is closed.

[0065] An outer protective cover 33 is provided at the first opening, and an inner protective cover 31 is provided at the second opening. The outer protective cover 33 and the inner protective cover 31 are rotatably connected to the tube 32. When there is no pressure difference between the refrigerator compartment 1 and the external environment of the refrigerator, the outer protective cover 33 and the inner protective cover 31 are in their initial state, so that the tube 32 is closed by the outer protective cover 33 and the inner protective cover 31.

[0066] When the pressure difference between the refrigerator compartment 1 and the outside of the refrigerator exceeds a preset value, the outer protective cover 33 and the inner protective cover 31 rotate. After rotating a certain angle, the connecting pipe 32 is open, allowing gas exchange between the refrigerator compartment 1 and the external environment. Gas exchange is only possible when the pressure difference between the refrigerator compartment 1 and the outside of the refrigerator exceeds the preset value. Under other conditions, the refrigerator compartment 1 is not connected to the external environment, and the cold air inside the refrigerator compartment 1 will not escape. The refrigeration effect will not deteriorate due to the connecting pipe 32. The preset value is the pressure difference between the refrigerator compartment 1 and the external environment that causes the outer protective cover 33 and the inner protective pipe 31 to open.

[0067] In some embodiments, such as Figure 3 As shown, the air-cooled refrigerator also includes a refrigerator air damper 7, and the controller 4 is further configured to: control the refrigerator air damper 7 to open when the refrigeration fan 5 is running at a first speed; and control the refrigerator air damper 7 to close when the refrigeration fan 5 is running at a second speed.

[0068] When the refrigeration fan 5 operates at its first speed, it primarily cools the refrigerator compartment 1. At this time, the refrigeration damper 7 opens, allowing cold air to enter both the refrigerator compartment 1 and the freezer compartment 2. Once the temperature in the refrigerator compartment 1 reaches the preset refrigeration temperature, further cooling of the refrigerator compartment 1 is unnecessary, and the refrigeration damper 7 can be closed, allowing a large amount of cold air to enter and cool the freezer compartment 2. Simultaneously, since the preset freezing temperature is lower than the preset refrigeration temperature, the first speed can be set to be lower than the second speed. By increasing the speed of the refrigeration fan 5, rapid cooling of the freezer compartment 2 can be achieved.

[0069] Meanwhile, the air-cooled refrigerator will be equipped with a refrigeration air duct and a freezing air duct. In the air-cooled refrigerator provided in the embodiments of this application, such as Figure 2 As shown, the refrigerated return air inlet 8 of the refrigerated air duct is located on the side of the refrigerated compartment 1 that is close to the passage, so that the refrigerated return air inlet 8 is close to the connecting module 3. When the refrigeration fan 5 is running at the second speed, the refrigerated return air inlet 8 is in a negative pressure state. The higher the speed of the refrigeration fan 5, the lower the air pressure at the refrigerated return air inlet 8, and the more outside gas enters from the connecting module 3, which has a better effect on refrigeration and humidification.

[0070] In some embodiments, the air-cooled refrigerator further includes a defrost sensor 61 and a defrost heater 62, wherein the defrost heater 62 is connected to the evaporator 6 in the refrigeration system; and the defrost sensor 61 is connected to the controller 4.

[0071] Controller 4 is also configured as follows:

[0072] Obtain the evaporator temperature detected by defrosting sensor 61;

[0073] If the evaporator temperature is lower than the preset evaporation temperature, the defrosting heater 62 will be turned on for a preset time.

[0074] The defrost sensor 61 is primarily used to monitor the surface temperature of the evaporator 6. The controller 4 determines whether the evaporator 6 needs defrosting based on the temperature detected by the defrost sensor 61. When the surface temperature of the evaporator 6 reaches a certain low temperature, the defrost heater 62 is activated. The heat generated by the power supply helps melt the frost accumulated on the evaporator 6. Once the frost on the surface of the evaporator 6 has been completely melted, the defrosting process ends, and the heater stops working. Figure 4 As shown, when the evaporator temperature detected by the defrost sensor 61 is lower than the preset evaporation temperature, the defrost heater 62 can be controlled to turn on until the defrosting of the evaporator 6 is completed.

[0075] In some embodiments, controller 4 is further configured to:

[0076] Obtain the cumulative operating time of the refrigeration fan 5 and the compressor;

[0077] If the cumulative running time exceeds the preset cumulative time, the defrosting heater 62 will be activated for the preset time.

[0078] During the operation of the refrigeration fan 5 and compressor, water vapor in the air may condense and frost onto the evaporator 6. Therefore, by obtaining the cumulative operating time of the refrigeration fan 5 and compressor, it is convenient to determine the defrosting status of the evaporator 6.

[0079] See you again Figure 4 When the evaporator temperature detected by the defrost sensor 61 is not lower than the preset evaporation temperature, the compressor can be turned on and the refrigeration fan 5 can be run at the first speed to maintain the refrigerator's cooling. At the same time, the cumulative running time of the compressor and the refrigeration fan 5 is recorded. When the running time is greater than the preset cumulative time, the evaporator 6 will defrost. The defrost heater 62 is turned on to heat the evaporator 6 until the defrosting of the evaporator 6 is completed.

[0080] Each time evaporator 6 needs defrosting and the evaporator temperature is not lower than the preset evaporation temperature, the cumulative running time of the refrigeration fan 5 and compressor can be reset to zero and recalculated. When the cumulative running time of the refrigeration fan 5 and compressor exceeds the preset cumulative time, the controller 4 controls the defrosting heater 62 to start until defrosting is complete. The controller adjusts the refrigeration fan 5 and compressor based on the refrigerator compartment temperature and freezer compartment temperature. When evaporator 6 needs defrosting and the evaporator temperature is less than or equal to the preset evaporation temperature, the defrosting heater 62 can be directly started until defrosting is complete. It is understood that the cumulative running time can be set according to the actual situation of the refrigerator, with a minimum cumulative running time of 5 minutes.

[0081] In some embodiments, the first preset condition is: the temperature of the refrigerator compartment is greater than the preset refrigerator temperature and the temperature of the evaporator is greater than the preset evaporation temperature; the second preset condition is: the temperature of the freezer compartment is greater than the preset freezing temperature.

[0082] The preset refrigeration temperature is the highest permissible temperature of refrigerator compartment 1, the evaporation temperature is the lowest temperature at which frost appears on evaporator 6, and the preset freezing temperature is the highest permissible temperature of freezer compartment 2. For example, such as Figure 5 As shown, Figure 5 This is a flowchart of the cooling mode for a frost-free refrigerator. When the refrigerator compartment temperature is higher than the preset refrigerator temperature, it indicates that the refrigerator compartment temperature is too high and cooling is needed to lower the temperature of refrigerator compartment 1. While cooling refrigerator compartment 1, it is necessary to determine whether the evaporator 6 has defrosted. Therefore, it can be determined whether the temperature of the evaporator 6 is lower than the preset evaporation temperature. If the evaporator temperature is not lower than the preset evaporation temperature, the refrigerator damper 7, the cooling fan 5, and the compressor can be started, with the cooling fan 5 running at its first speed. When the evaporator 6 is lower than the preset evaporation temperature, defrosting of the evaporator 6 can be performed first. After defrosting is completed, the refrigerator damper 7, the cooling fan 5, and the compressor can be started, with the cooling fan 5 running at its first speed.

[0083] When the refrigerator compartment temperature is lower than the preset refrigerator temperature, the freezer compartment 2 needs to be cooled. When the freezer compartment temperature is lower than the preset freezing temperature, the cooling fan 5 continues to run at the first speed. When the freezer compartment temperature is greater than or equal to the preset freezing temperature, the refrigerator air damper 7 is closed, and the cooling fan 5 runs at the second speed until the freezer compartment temperature is lower than the preset freezing temperature, at which point the compressor and cooling fan 5 stop. By detecting the refrigerator compartment temperature, freezer compartment temperature, and evaporator temperature, the operating status of the frost-free refrigerator can be obtained in real time, thereby controlling the start or stop of the cooling fan 5 and compressor, and controlling the speed of the cooling fan 5 according to specific conditions to reduce energy consumption.

[0084] In some embodiments, this application also provides a method for controlling a frost-free refrigerator, applied to the frost-free refrigerator provided in the above embodiments, including:

[0085] The temperature of the refrigerator compartment detected by the refrigeration temperature sensor 12 is obtained;

[0086] If the refrigerator compartment temperature meets the preset conditions, the compressor and refrigeration fan 5 are controlled to run at the first speed until the freezer compartment meets the preset freezing temperature.

[0087] In some embodiments, the air-cooled refrigerator control method further includes:

[0088] Obtain the evaporator temperature detected by defrosting sensor 61;

[0089] If the evaporator temperature is lower than the preset evaporation temperature, the defrosting heater 62 will be turned on for a preset time.

[0090] In some embodiments, the air-cooled refrigerator control method further includes:

[0091] Obtain the cumulative operating time of the refrigeration fan 5 and the compressor;

[0092] If the cumulative running time exceeds the preset cumulative time, the defrosting heater 62 will be activated for the preset time.

[0093] As can be seen from the above technical solutions, this application provides a frost-free refrigerator and a control method. The frost-free refrigerator includes: at least one refrigerator compartment 1 and a refrigerator door 11 connected to the refrigerator compartment 1; a refrigerator temperature sensor 12 is provided in the refrigerator compartment 1; a communication module 3 is provided in the refrigerator door 11; and a controller 4 electrically connected to the refrigerator refrigeration system. The refrigeration system includes a compressor and a refrigeration fan 5 for controlling the refrigerator compartment temperature. The controller 4 is configured to: acquire the refrigerator compartment temperature detected by the refrigerator temperature sensor 12; if the refrigerator compartment temperature meets a first preset condition, control the compressor and the refrigeration fan 5 to run at a first speed until the refrigerator compartment temperature meets the preset refrigerator temperature; acquire the freezer compartment temperature detected by the freezer temperature sensor 21; if the freezer compartment temperature meets a second preset condition, control the compressor and the refrigeration fan 5 to run at a second speed until the freezer compartment meets the preset freezer temperature. By placing the connecting module 3 on the refrigerator door 11 and placing it close to the refrigerator return air vent 8, the negative pressure at the return air vent allows outside air to enter the refrigerator compartment 1 when the refrigerator is cooling, increasing the relative humidity of the refrigerator compartment 1, thus solving the problem of low humidity and high energy consumption in the refrigerator compartment 1 of the air-cooled refrigerator.

[0094] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A type of air-cooled refrigerator, characterized in that, include: At least one cold storage compartment (1) and a cold storage door (11) connected to the cold storage compartment (1); a cold storage temperature sensor (12) is provided inside the cold storage compartment (1). At least one freezer compartment (2), the freezer compartment (2) being equipped with a freezer temperature sensor (21); The communication module (3) is installed in the refrigerator door (11); The connecting module (3) includes an inner protective cover (31), a connecting pipe (32), and an outer protective cover (33). The connecting pipe (32) includes a first opening and a second opening. The first opening is located on the outer surface of the refrigerator door (11), and the second opening is located on the inner surface of the refrigerator compartment (1). The outer protective cover (33) is rotatably connected to the first opening, and the inner protective cover (31) is rotatably connected to the second opening. A controller (4) electrically connected to the refrigerator refrigeration system, which includes a compressor, a refrigeration fan (5), and an evaporator (6) for controlling the temperature of the refrigerator compartment (1). The evaporator (6) is disposed between the refrigerator compartment (1) and the freezer compartment (2); The controller (4) is configured as follows: Obtain the temperature of the refrigerator compartment detected by the refrigerator temperature sensor (12); If the temperature of the cold storage compartment meets the first preset condition, then control the compressor and the refrigeration fan (5) to run at the first speed until the temperature of the cold storage compartment meets the preset refrigeration temperature; Obtain the freezer temperature detected by the freezer temperature sensor (21); If the temperature of the freezer compartment meets the second preset condition, then control the compressor and the refrigeration fan (5) to run at the second speed until the freezer compartment meets the preset freezing temperature; It also includes a refrigeration damper (7), and the controller (4) is further configured to: When the refrigeration fan (5) is running at the first speed, the refrigeration damper (7) is controlled to open; When the refrigeration fan (5) is running at the second speed, the refrigeration damper (7) is controlled to close. The first rotational speed is less than the second rotational speed; It also includes a refrigerated return air vent (8), which is located on the side of the refrigerated compartment (1) near the connecting module (3).

2. The air-cooled refrigerator according to claim 1, characterized in that, It also includes a defrost sensor (61) and a defrost heater (62), the defrost heater (62) being connected to the evaporator (6); the defrost sensor (61) being connected to the controller (4); The controller (4) is also configured to: Obtain the evaporator temperature detected by the defrosting sensor (61); If the evaporator temperature is lower than the preset evaporation temperature, the defrosting heater (62) is controlled to start for a preset time.

3. The air-cooled refrigerator according to claim 2, characterized in that, The controller (4) is also configured to: Obtain the cumulative operating time of the refrigeration fan (5) and the compressor; If the cumulative running time is greater than the preset cumulative time, the defrosting heater (62) is controlled to start for the preset time.

4. The air-cooled refrigerator according to claim 3, characterized in that, The first preset condition is that the temperature of the refrigerator compartment is greater than the preset refrigerator temperature and the temperature of the evaporator is greater than the preset evaporation temperature; the second preset condition is that the temperature of the freezer compartment is greater than the preset freezer temperature.

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