Refrigerator drawer anti-icing method, anti-icing device and dual-system refrigerator

Abstract

The invention provides a refrigerator drawer anti-icing method, an anti-icing device and a dual-system refrigerator, and relates to the technical field of refrigeration equipment.The refrigerator drawer anti-icing method comprises the steps that under the condition that it is confirmed that the temperature of a refrigeration chamber reaches a first temperature threshold value T1, an evaporator is turned off, and a draught fan is kept to be turned on; after the evaporator is turned off for a first duration t1, whether the temperature of the refrigerating chamber reaches a second temperature threshold value T2 or not is determined, and the first temperature threshold value T1 is lower than the second temperature threshold value T2; under the condition that the temperature of the refrigerating chamber reaches a second temperature threshold value T2, the temperature of an evaporator is obtained; and under the condition that the temperature of the evaporator is higher than the third temperature threshold T3, the fan is closed. According to the anti-freezing method for the refrigerator drawer, the temperature of the cold air entering the freezing chamber exceeds the freezing temperature, even if the cold air makes contact with the drawer, the drawer cannot be frozen and cannot be opened, a user can open the drawer stably, and the use experience of the user is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigerator drawer anti-icing method, an anti-icing device and a double-system refrigerator. BACKGROUND

[0002] In the existing double-system refrigerator, the refrigeration compartment is usually equipped with an independent evaporator and a fan to realize accurate control of the temperature in the refrigeration compartment.

[0003] In actual use, when the temperature of the refrigeration compartment reaches the set value, the evaporator and the fan in the refrigeration compartment are usually closed at the same time. Since the temperature of the surface of the evaporator is relatively low at this time, and the cold air has the characteristic of sinking, the drawer located below the refrigeration compartment may be affected by the cold air, resulting in a too-low temperature or even icing, which makes it difficult to open the drawer and affects the user experience.

[0004] Therefore, a new technical solution is needed to solve the above technical problems. SUMMARY

[0005] The present application aims to provide a refrigerator drawer anti-icing method, an anti-icing device and a double-system refrigerator, which can stably open the drawer and provide a good user experience, so as to solve the problem of difficult opening of the drawer and affect the user experience.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical means:

[0007] In a first aspect of the present application, a refrigerator drawer anti-icing method is provided for a double-system refrigerator, wherein the double-system refrigerator comprises a refrigeration compartment and a freezing compartment, the refrigeration compartment is arranged above the freezing compartment and communicates with the freezing compartment, the refrigeration compartment is provided with a fan and an evaporator, and the freezing compartment is provided with a refrigerator drawer, comprising:

[0008] When it is confirmed that the temperature of the refrigeration compartment reaches a first temperature threshold T1, the evaporator is closed and the fan is kept on;

[0009] After the first time length t of closing the evaporator, it is confirmed whether the temperature of the refrigeration compartment reaches a second temperature threshold T2, wherein the first temperature threshold T1 is lower than the second temperature threshold T2;

[0010] When the temperature of the refrigeration compartment reaches the second temperature threshold T2, the temperature of the evaporator is obtained;

[0011] When the temperature of the evaporator is higher than a third temperature threshold T3, the fan is closed.

[0012] Optionally, the closing the evaporator and keeping the fan on in the case that the refrigeration compartment temperature reaches the first temperature threshold T1 comprises:

[0013] acquiring the refrigeration compartment temperature when starting refrigeration;

[0014] determining whether the refrigeration compartment temperature is less than or equal to the first temperature threshold T1;

[0015] if yes, closing the evaporator and keeping the fan on.

[0016] Optionally, the confirming whether the refrigeration compartment temperature reaches the second temperature threshold T2 after the first time length t1 of closing the evaporator further comprises:

[0017] restarting the evaporator to cool the refrigeration compartment in the case that the refrigeration compartment temperature does not reach the second temperature threshold T2;

[0018] confirming the refrigeration compartment temperature again until the evaporator is closed when the refrigeration compartment temperature reaches the second temperature threshold T2.

[0019] Optionally, the closing the fan in the case that the evaporator temperature is higher than the third temperature threshold T3 comprises:

[0020] determining whether the evaporator temperature is greater than or equal to the third temperature threshold T3;

[0021] if yes, closing the fan;

[0022] if no, closing the fan in the case that the evaporator temperature is greater than or equal to the third temperature threshold T3.

[0023] Optionally, the dual-system refrigerator further comprises a variable-temperature compartment, the variable-temperature compartment is arranged between the refrigeration compartment and the freezing compartment and is communicated with the refrigeration compartment; the ice-preventing method of the refrigerator drawer further comprises:

[0024] confirming whether the temperature relatively lower of the refrigeration compartment temperature and the variable-temperature compartment temperature reaches the fourth temperature threshold T4;

[0025] in the case that the temperature relatively lower of the refrigeration compartment temperature and the variable-temperature compartment temperature reaches the fourth temperature threshold T4, closing the evaporator and controlling the fan to send cold energy to the temperature relatively lower of the refrigeration compartment temperature and the variable-temperature compartment temperature.

[0026] Optionally, the confirming whether the temperature relatively lower of the refrigeration compartment temperature and the variable-temperature compartment temperature reaches the fourth temperature threshold T4 comprises:

[0027] When refrigeration begins, it is determined whether the temperature of the cold storage compartment is greater than or equal to the temperature of the variable temperature compartment;

[0028] If so, compare the temperature of the variable temperature chamber with the fourth temperature threshold T4;

[0029] If not, compare the temperature of the cold storage room with the fourth temperature threshold T4.

[0030] Optionally, the step of shutting down the evaporator and controlling the fan to deliver cooling energy to the room with the lower temperature among the cold storage room and the variable temperature room when the lower temperature is confirmed to be the fourth temperature threshold T4 includes:

[0031] If it is determined that the temperature of the cold storage room is relatively lower, control the fan to send cold energy to the cold storage room;

[0032] If the temperature of the variable temperature chamber is determined to be relatively lower, the fan is controlled to deliver cooling energy to the variable temperature chamber.

[0033] Optionally, it also includes:

[0034] When the temperature of the variable temperature chamber is relatively low, determine whether the temperature of the variable temperature chamber has reached the fifth temperature threshold T5; wherein, the fifth temperature threshold T5 is lower than the fourth temperature threshold T4.

[0035] If so, the fan is turned off when the evaporator temperature is above the third temperature threshold T3; otherwise, the evaporator is turned on again until the temperature of the variable temperature chamber reaches the fifth temperature threshold T5.

[0036] A second aspect of the present invention provides an anti-icing device for a dual-system refrigerator, the dual-system refrigerator including a refrigerator compartment and a freezer compartment, the refrigerator compartment being located above and communicating with the freezer compartment, the refrigerator compartment being provided with a fan and an evaporator, and the freezer compartment being provided with a refrigerator drawer, comprising: a memory, a processor, and a control program stored in the memory and executable on the processor, wherein when the control program is executed by the processor, it implements the refrigerator drawer anti-icing method as described above.

[0037] A third aspect of the present invention provides a dual-system refrigerator, including the anti-icing device described above.

[0038] Compared with existing technologies, the present invention brings the following technical effects:

[0039] The refrigerator drawer anti-icing method of this invention first shuts off the evaporator in the refrigerator compartment, allowing the temperature in the refrigerator compartment to gradually rise while maintaining the circulation of cold air under the action of a fan, preventing cold air from sinking into the freezer compartment under gravity. When the temperature in the refrigerator compartment rises to a level that prevents the drawer from freezing, the fan is turned off, and the cold air in the refrigerator compartment sinks into the freezer compartment under gravity. The temperature of the cold air entering the freezer compartment exceeds the freezing temperature, so even if it comes into contact with the drawer, it will not freeze and prevent the drawer from being opened. Users can open the drawer reliably, resulting in a good user experience. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 The following are schematic diagrams of the structure of a dual-system refrigerator according to some embodiments of the present invention;

[0042] Figure 2 A flowchart illustrating a method for preventing ice buildup in a refrigerator drawer according to some embodiments of the present invention is shown.

[0043] Figure 3 A schematic diagram of the structure of a dual-system refrigerator according to some embodiments of the present invention is shown.

[0044] Explanation of key component symbols:

[0045] 100 - Dual-system refrigerator; 10 - Refrigerator compartment; 11 - Evaporator; 12 - Fan; 13 - First temperature sensor; 14 - Second temperature sensor; 15 - Refrigerator air damper; 20 - Freezer compartment; 21 - Refrigerator drawer; 30 - Variable temperature compartment; 31 - Third temperature sensor; 32 - Variable temperature air damper; 40 - Fresh-keeping compartment. Detailed Implementation

[0046] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0048] A dual-system refrigerator is a refrigerator where each compartment has its own independent fan and evaporator. Compared to traditional refrigerators, dual-system refrigerators can achieve more precise temperature control for both the refrigerator and freezer compartments through two separate fans and evaporators, further meeting users' food storage needs.

[0049] A dual-system refrigerator includes a refrigerator compartment and a freezer compartment. The refrigerator compartment is located above the freezer compartment and the refrigerator compartment and the freezer compartment are connected.

[0050] Please refer to [link / reference needed] for further explanation. Figure 1 In one specific embodiment, the refrigerator compartment 10 is directly connected to the freezer compartment 20, and cold air enters the freezer compartment 20 directly from the refrigerator compartment 10. Please refer to [link to relevant documentation]. Figure 3 In other specific embodiments, a variable temperature compartment 30 is also provided between the refrigerator compartment 10 and the freezer compartment 20, and the variable temperature compartment 30 is connected to the refrigerator compartment 10 and the freezer compartment 20. That is, the refrigerator compartment 10 is indirectly connected to the freezer compartment 20. The temperature in the variable temperature compartment 30 can be adjusted according to user needs, which is flexible and reliable.

[0051] Please see Figure 1 In a first aspect, the present invention provides a method for preventing ice buildup in a refrigerator drawer for use in a dual-system refrigerator 100. The dual-system refrigerator 100 includes a refrigerator compartment 10 and a freezer compartment 20. The refrigerator compartment 10 is located above the freezer compartment 20 and is in communication with the freezer compartment 20. The refrigerator compartment 10 is provided with a fan 12 and an evaporator 11. The freezer compartment 20 is provided with a refrigerator drawer 21.

[0052] Please see Figure 1 and Figure 2 Methods to prevent ice buildup in refrigerator drawers include:

[0053] S10: After confirming that the temperature of the cold storage room has reached the first temperature threshold T1, turn off the evaporator and keep the fan on.

[0054] A first temperature sensor is installed on the inner wall of the cold storage compartment to acquire the compartment temperature. The cold storage compartment temperature refers to the air temperature within it. With the fan off, the controller sends detection signals to the evaporator and fan based on the compartment temperature detected by the first temperature sensor. The evaporator shuts off in response to the signal, and the fan turns on. The fan remains on while the fan is already running. Thus, the cold air inside the cold storage compartment circulates throughout the compartment, driven by the fan. During this process, the cold storage compartment temperature gradually rises because the evaporator, used for cooling, stops operating.

[0055] S20: After the first time t of shutting off the evaporator, confirm whether the temperature of the cold storage compartment has reached the second temperature threshold T2, wherein the first temperature threshold T1 is lower than the second temperature threshold T2.

[0056] The second temperature threshold T2 is the critical temperature at which the air in the refrigerator compartment is insufficient to reach the refrigerator drawer. The second temperature threshold T2 = the first temperature threshold T1 + 3℃. For example, if the second temperature threshold T1 is 0℃, the second temperature threshold T2 is 3℃. The first duration t is the duration for which the fan continuously circulates cold air within the freezer compartment.

[0057] S30: Obtain the evaporator temperature when the temperature in the cold storage compartment reaches the second temperature threshold T2;

[0058] The evaporator is equipped with a second temperature sensor, which is used to obtain the evaporator temperature. Even when the evaporator is turned off, the evaporator temperature will gradually rise over time.

[0059] S40: If the evaporator temperature is higher than the third temperature threshold T3, turn off the fan.

[0060] The third temperature threshold, T3, is the temperature at which the condenser is insufficient to cause ice to form in the refrigerator drawers. After the fan is turned off, cold air stops circulating in the refrigerator compartment and, under the influence of gravity, settles in the refrigerator drawers of the freezer compartment.

[0061] The refrigerator drawer anti-icing method of this invention first shuts off the evaporator in the refrigerator compartment, allowing the temperature in the refrigerator compartment to gradually rise while maintaining the circulation of cold air under the action of a fan, preventing cold air from sinking into the freezer compartment under gravity. When the temperature in the refrigerator compartment rises to a level that prevents the drawer from freezing, the fan is turned off, and the cold air in the refrigerator compartment sinks into the freezer compartment under gravity. The temperature of the cold air entering the freezer compartment exceeds the freezing temperature, so even if it comes into contact with the drawer, it will not freeze and prevent the drawer from being opened. Users can open the drawer reliably, resulting in a good user experience.

[0062] Furthermore, this embodiment does not add any additional mechanical structures, resulting in a simple structure and low manufacturing cost.

[0063] In one specific embodiment, S10 includes:

[0064] S11: Obtain the temperature of the cold storage compartment when cooling begins;

[0065] S12: Determine whether the temperature of the cold storage compartment is less than or equal to the first temperature threshold T1;

[0066] S13: If so, turn off the evaporator and keep the fan on.

[0067] A first temperature sensor is installed on the inner wall of the refrigerator compartment to obtain the temperature of the refrigerator compartment. The refrigerator compartment temperature is the air temperature inside the refrigerator compartment. With the fan off, the controller sends a detection signal to the evaporator and fan based on the refrigerator compartment temperature detected by the first temperature sensor. The evaporator shuts down in response to the detection signal, and the fan turns on in response to the detection signal. The fan remains on while the fan is already running. Thus, the cold air in the refrigerator compartment circulates throughout the entire refrigerator compartment driven by the fan. Therefore, even if the evaporator is turned off before the fan is turned off, keeping the fan on allows the cold air to circulate within the refrigerator compartment for a period of time without entering the freezer compartment.

[0068] In one specific embodiment, S20 further includes:

[0069] S21: If the temperature of the cold storage room does not reach the second temperature threshold T2, restart the evaporator to cool the cold storage room.

[0070] The first temperature sensor acquires the temperature of the cold storage compartment. Due to the limited cooling efficiency of the evaporator, there is a situation where, after a first duration t1, the temperature in the cold storage compartment has not yet reached the second temperature threshold T2. The evaporator responds to the detection signal and starts, continuing to cool the cold storage compartment. During this process, the fan remains on to circulate cold air within the cold storage compartment.

[0071] S22: Reconfirm the temperature of the cold storage compartment until the temperature of the cold storage compartment reaches the second temperature threshold T2, then shut down the evaporator.

[0072] The temperature in the refrigerator compartment continuously decreases due to cooling from the evaporator. After a second time interval t2, the first temperature sensor again acquires the refrigerator compartment temperature and compares it with the second temperature threshold T2. When the refrigerator compartment temperature reaches the second temperature threshold T2, it indicates that the air in the refrigerator compartment has been cooled sufficiently, and the refrigerator compartment stops operating in response to the detection signal. If the refrigerator compartment temperature has not yet reached the second temperature threshold T2, the evaporator remains on, and the temperature is checked again against the second temperature threshold T2 after another second time interval t2. This ensures that even in the event of abnormal conditions such as decreased evaporator efficiency, the refrigerator compartment temperature can still reach the second temperature threshold T2, demonstrating good stability.

[0073] In one specific embodiment, S40 includes:

[0074] S41: Determine whether the evaporator temperature is greater than or equal to the third temperature threshold T3;

[0075] S42: If so, turn off the fan;

[0076] S43: If not, shut down the fan if the evaporator temperature is greater than or equal to the third temperature threshold T3.

[0077] The third temperature threshold is -3℃. If the evaporator temperature is ≥-3℃ at this point, the remaining cooling capacity is considered to have a minimal impact on the compartment, and the fan is turned off. If the evaporator temperature remains <-3℃, the remaining cooling capacity is considered to have a significant impact on the compartment, and the fan needs to continue running. Thus, when the refrigerator compartment temperature reaches the second temperature threshold and the evaporator temperature is higher than the third temperature threshold, neither the current cold air nor the subsequent continuous entry of cold air into the freezer compartment will cause ice to form in the refrigerator drawers.

[0078] Combination Figure 3 In one specific embodiment, the dual-system refrigerator 100 further includes a variable temperature compartment 30, which is located between the refrigerator compartment 10 and the freezer compartment 20 and is connected to the refrigerator compartment 10.

[0079] Understandably, the temperature within the variable-temperature compartment 30 can be adjusted according to user needs. The temperature of the variable-temperature compartment 30 can be higher or lower than the temperature of the refrigerated compartment 10. For example, when freezing meat products, the temperature of the variable-temperature compartment 30 is adjusted to be lower than the temperature of the refrigerated compartment 10. When temporarily storing fruits or vegetables, excessively low temperatures can damage their nutritional components; therefore, the temperature of the variable-temperature compartment 30 is adjusted to be higher than the temperature of the refrigerated compartment 10.

[0080] Methods to prevent ice buildup in refrigerator drawers also include:

[0081] S51: Confirm whether the temperature of the cold storage room and the temperature of the variable temperature room, which is relatively lower, has reached the fourth temperature threshold T4.

[0082] The variable-temperature compartment is located below the refrigerator compartment in the direction of gravity and above the freezer compartment in the direction of gravity. The cold air in the refrigerator compartment first passes through the variable-temperature compartment before entering the freezer compartment. The cold air exchanges heat with the air in the variable-temperature compartment. When the temperature in the variable-temperature compartment is lower than the temperature in the refrigerator compartment, the air in the refrigerator compartment will become colder. If we still compare the refrigerator compartment temperature with the fourth temperature threshold, it is obviously impossible to accurately obtain the temperature of the cold air entering the freezer compartment. When the temperature in the variable-temperature compartment is higher than the temperature in the refrigerator compartment, the temperature of the cold air in the refrigerator compartment will become higher. If we still compare the refrigerator compartment temperature with the fourth temperature threshold, there will be a problem of low regulation efficiency. Therefore, by identifying the lower of the refrigerator compartment temperature and the variable-temperature compartment temperature, the minimum air temperature entering the freezer compartment can be accurately determined.

[0083] S52: If the temperature of the cold storage room and the variable temperature room is confirmed to be the lower of the two temperatures, the evaporator is turned off and the fan is controlled to deliver the cooling capacity to the cold storage room and the variable temperature room.

[0084] The fan has two modes: a cold storage room air supply mode and a variable temperature room air supply mode. The variable temperature room has an opening facing the cold storage room, and a variable temperature damper is installed at the opening. In the variable temperature room air supply mode, the fan rotates to face the opening, and the variable temperature damper opens to allow cold air from the cold storage room to enter the variable temperature damper through the opening. In the cold storage room air supply mode, the fan's air outlet direction is away from the opening of the variable temperature room.

[0085] In this embodiment, in addition to obtaining the temperature of the refrigerator compartment, the temperature of the variable temperature compartment is also detected and compared with the temperature of the refrigerator compartment. This is to ensure that the air in the refrigerator compartment does not freeze the refrigerator drawers after exchanging heat with the variable temperature compartment and settling down. This is suitable for refrigerators with dual systems that have variable temperature compartments and is highly versatile.

[0086] In one specific embodiment, S51 includes:

[0087] S511: When refrigeration begins, determine whether the temperature of the cold storage compartment is greater than or equal to the temperature of the variable temperature compartment;

[0088] To detect the temperature of the variable-temperature chamber, a third temperature sensor is installed on the inner wall of the chamber. This third temperature sensor is used to acquire the air temperature within the variable-temperature chamber. The temperature of the variable-temperature chamber is the temperature of the air inside.

[0089] S512: If so, compare the temperature of the variable temperature chamber with the fourth temperature threshold T4;

[0090] S513: If not, compare the temperature of the cold storage compartment with the fourth temperature threshold T4.

[0091] By comparing the temperature of the variable temperature compartment and the temperature of the refrigerated compartment, the temperature entering the freezer compartment can be accurately obtained, further improving the stability of the anti-icing method.

[0092] In one specific embodiment, S52 includes:

[0093] S521: When it is determined that the temperature of the cold storage room is relatively lower, control the fan to send the cooling capacity to the cold storage room;

[0094] S522: When it is determined that the temperature of the variable temperature room is relatively lower, control the fan to send cooling to the variable temperature room.

[0095] This is similar to a dual-system refrigerator that only has a refrigerator compartment and a freezer compartment, without a variable-temperature compartment. In this way, the cold air circulates between the refrigerator compartment or the variable-temperature compartment.

[0096] Alternatively, methods to prevent ice buildup in refrigerator drawers may also include:

[0097] S53: When the temperature of the variable temperature chamber is relatively low, determine whether the temperature of the variable temperature chamber has reached the fifth temperature threshold T5; wherein the fifth temperature threshold T5 is lower than the fourth temperature threshold T4.

[0098] S54: If yes, then turn off the fan if the evaporator temperature is above the third temperature threshold T3; otherwise, turn the evaporator back on until the temperature of the variable temperature chamber reaches the fifth temperature threshold T5.

[0099] The fifth temperature threshold is the fourth temperature threshold + 2℃. The fifth temperature threshold is the critical temperature at which cold air from the variable-temperature room enters the freezer room without causing ice to form in the drawers. By controlling the evaporator to open and using a fan to deliver cooling energy to the variable-temperature room, the system ensures that the temperature in the variable-temperature room remains at the fifth temperature threshold even when the temperature inside the variable-temperature room is abnormal, demonstrating strong stability.

[0100] A second aspect of the present invention provides an anti-icing device for a dual-system refrigerator, the dual-system refrigerator including a refrigerator compartment and a freezer compartment, the refrigerator compartment being located above the freezer compartment and communicating with the freezer compartment, the refrigerator compartment being provided with a fan and an evaporator, and the freezer compartment being provided with a refrigerator drawer, comprising: a memory, a processor, and a control program stored in the memory and executable on the processor, the control program being executed by the processor to implement a refrigerator drawer anti-icing method as described above.

[0101] The anti-icing device in this embodiment employs any of the refrigerator drawer anti-icing methods described in this embodiment. First, the evaporator in the refrigerator compartment is shut off, allowing the temperature in the refrigerator compartment to gradually rise. Cold air is kept circulating under the action of a fan, preventing it from sinking into the freezer compartment due to gravity. When the temperature in the refrigerator compartment rises to a level where the drawer cannot freeze, the fan is turned off, and the cold air in the refrigerator compartment sinks into the freezer compartment under gravity. The temperature of the cold air entering the freezer compartment exceeds the freezing temperature, so even if it comes into contact with the drawer, it will not freeze and prevent it from being opened. The user can open the drawer reliably, resulting in a good user experience.

[0102] Please see Figure 1 and Figure 3 In a third aspect, the present invention provides a dual-system refrigerator 100, including the anti-icing device of any of the above embodiments.

[0103] In this embodiment of the dual-system refrigerator, by employing an anti-icing device according to any implementation, the evaporator 11 of the refrigerator compartment 10 is first shut off, allowing the temperature of the refrigerator compartment 10 to gradually rise. Cold air is kept circulating under the action of the fan 12, preventing it from sinking into the freezer compartment 20 due to gravity. When the temperature of the refrigerator compartment 10 rises to a level that prevents ice formation in the refrigerator drawer 21, the fan 12 is shut off, and the cold air in the refrigerator compartment 10 sinks into the freezer compartment 20 under gravity. The temperature of the cold air entering the freezer compartment 20 exceeds the freezing temperature, so even if it comes into contact with the refrigerator drawer 21, the drawer will not freeze and become unopenable. Users can open the drawer reliably, resulting in a good user experience and good operational stability for the dual-system refrigerator 100.

[0104] In one specific embodiment, the dual-system refrigerator 100 includes a refrigerator compartment 10 and a freezer compartment 20. The refrigerator compartment 10 is located above the freezer compartment 20 and is connected to the freezer compartment 20. The refrigerator compartment 10 is equipped with a fan 12 and an evaporator 11, and the freezer compartment 20 is equipped with a refrigerator drawer 21.

[0105] The cold storage compartment 10 is also equipped with a cold storage damper 15. By controlling the opening and closing of the cold storage damper 15, the cold air can be smoothly introduced into the cold storage compartment 10. The cold storage compartment 10 is also equipped with a first temperature sensor 13 and a second temperature sensor 14. The first temperature sensor 13 is located on the inner wall of the cold storage compartment 10 and is used to obtain the air temperature inside the cold storage compartment 10. The second temperature sensor 14 is located on the evaporator and is used to obtain the evaporator temperature 11.

[0106] In other embodiments, the dual-system refrigerator 100 also includes a variable temperature compartment 30, which is located between the refrigerator compartment 10 and the freezer compartment 20 and is connected to the refrigerator compartment 10 and the freezer compartment 20.

[0107] The variable temperature compartment 30 is equipped with a third temperature sensor 31 and a variable temperature damper 32. The third temperature sensor 31 is located on the inner wall of the variable temperature compartment 30 and is used to obtain the air temperature inside the variable temperature compartment 30. The variable temperature damper 32 is used to open or close the variable temperature compartment 30 and the refrigeration compartment 10.

[0108] The dual-system refrigerator 100 also includes a fresh food compartment 40, which is arranged side by side with the variable temperature compartment 30 for storing vegetables and fruits.

[0109] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom still fall within the scope of protection of this invention.

Claims

1. A method for preventing ice formation in a refrigerator drawer for a dual system refrigerator, the dual system refrigerator including a refrigeration compartment and a freezing compartment, the refrigeration compartment being provided above the freezing compartment and communicating with the freezing compartment, the refrigeration compartment being provided with a fan and an evaporator, the freezing compartment being provided with a refrigerator drawer, the method being characterized by, Comprising: In the case that the refrigeration compartment temperature reaches a first temperature threshold T1, the evaporator is turned off, and the fan is kept on; After the evaporator is turned off for a first time duration t1, it is determined whether the refrigeration compartment temperature reaches a second temperature threshold T2, wherein the first temperature threshold T1 is lower than the second temperature threshold T2; In the case that the refrigeration compartment temperature reaches the second temperature threshold T2, the evaporator temperature is obtained; In the case that the evaporator temperature is higher than a third temperature threshold T3, the fan is turned off.

2. The icebox drawer anti-icing method of claim 1, wherein, The case that the refrigeration compartment temperature reaches a first temperature threshold T1, the evaporator is turned off, and the fan is kept on, comprises: When the refrigeration is started, the refrigeration compartment temperature is obtained; It is determined whether the refrigeration compartment temperature is less than or equal to the first temperature threshold T1; If yes, the evaporator is turned off, and the fan is kept on.

3. The icebox drawer anti-icing method of claim 1, wherein, The case that the refrigeration compartment temperature reaches a first temperature threshold T1, the evaporator is turned off, and the fan is kept on, comprises: In the case that the refrigeration compartment temperature does not reach the second temperature threshold T2, the evaporator is turned on again to cool the refrigeration compartment; The refrigeration compartment temperature is determined again until the evaporator is turned off when the refrigeration compartment temperature reaches the second temperature threshold T2.

4. The icebox drawer anti-icing method of claim 1, wherein, The case that the evaporator temperature is higher than a third temperature threshold T3, the fan is turned off, comprises: It is determined whether the evaporator temperature is greater than or equal to the third temperature threshold T3; If yes, the fan is turned off; If no, in the case that the evaporator temperature is greater than or equal to the third temperature threshold T3, the fan is turned off.

5. The icebox drawer anti-icing method according to claim 1, characterized in that, The dual-system refrigerator further comprises a variable-temperature compartment, which is arranged between the refrigeration compartment and the freezing compartment and is communicated with the refrigeration compartment; The ice-preventing method of the refrigerator drawer further comprises: It is determined whether the temperature relatively lower between the refrigeration compartment temperature and the variable-temperature compartment temperature reaches a fourth temperature threshold T4; In the case that the temperature relatively lower between the refrigeration compartment temperature and the variable-temperature compartment temperature reaches the fourth temperature threshold T4, the evaporator is turned off, and the fan is controlled to send cold energy to the temperature relatively lower between the refrigeration compartment temperature and the variable-temperature compartment temperature.

6. The icebox drawer anti-icing method according to claim 5, characterized in that, The case that the temperature relatively lower between the refrigeration compartment temperature and the variable-temperature compartment temperature reaches a fourth temperature threshold T4, comprises: When the refrigeration is started, it is determined whether the refrigeration compartment temperature is greater than or equal to the variable-temperature compartment temperature; If yes, the variable-temperature compartment temperature is compared with the fourth temperature threshold T4; If no, the refrigeration compartment temperature is compared with the fourth temperature threshold T4.

7. The icebox drawer anti-icing method according to claim 5, characterized in that, The case that the temperature relatively lower between the refrigeration compartment temperature and the variable-temperature compartment temperature reaches a fourth temperature threshold T4, the evaporator is turned off, and the fan is controlled to send cold energy to the temperature relatively lower between the refrigeration compartment temperature and the variable-temperature compartment temperature, comprises: In the case that it is determined that the refrigeration compartment temperature is relatively lower, the fan is controlled to send cold energy to the refrigeration compartment; If it is determined that the temperature of the temperature-variable compartment is relatively low, the fan is controlled to send cold energy to the temperature-variable compartment.

8. The icebox drawer anti-icing method of claim 5, wherein, Further comprising: If the temperature of the temperature-variable compartment is relatively low, it is determined whether the temperature of the temperature-variable compartment reaches a fifth temperature threshold T5; wherein the fifth temperature threshold T5 is lower than the fourth temperature threshold T4. If yes, the fan is turned off if the evaporator is higher than a third temperature threshold T3; if no, the evaporator is turned on again until the temperature of the temperature-variable compartment reaches the fifth temperature threshold T5.

9. An anti-icing device, characterized in that For a dual-system refrigerator, the dual-system refrigerator comprises a refrigeration compartment and a freezing compartment, the refrigeration compartment is arranged above the freezing compartment and communicates with the freezing compartment, the refrigeration compartment is provided with a fan and an evaporator, and the freezing compartment is provided with a refrigerator drawer, characterized by comprising a memory, a processor and a control program stored in the memory and executable on the processor, and the control program is executed by the processor to realize the ice-preventing method of the refrigerator drawer as claimed in any one of claims 1-8.

10. A dual system refrigerator, characterized by, The ice-preventing device as claimed in claim 9 is included.

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