Refrigerator and thawing control method thereof

Abstract

The application discloses a refrigerator and a thawing control method thereof. The refrigerator is provided with a thawing system, which comprises a thawing cavity, a heat exchanger, a condenser, an evaporator, a first throttling device, a second throttling device and a third throttling device. The heat exchanger is used for heat exchange with the thawing cavity. After refrigerant from a refrigerator refrigerating system passes through the condenser, part of the refrigerant flows into the heat exchanger through the first throttling device, and the other part of the refrigerant flows into the evaporator after being combined with refrigerant output from the heat exchanger through the second throttling device and the third throttling device. When the thawing system is working, a target temperature set by a user is compared with a thawing temperature of the thawing cavity, and the opening degrees of the first throttling device, the second throttling device and the third throttling device are controlled according to a comparison result. According to the embodiment of the application, the thawing efficiency of food is improved by setting an independent thawing area in the refrigerator to thaw frozen food.

Description

Technical Field

[0001] This invention relates to the field of refrigerator control technology, and in particular to a refrigerator and its defrosting control method. Background Technology

[0002] In recent years, with the rapid development of dietary habits and lifestyles, surveys of user needs in the home appliance industry have revealed a growing market demand for rapid thawing of frozen foods. Refrigerators, as the direct medium for food storage and freezing, are expected by users to have a thawing function. In daily life, users often need to thaw frozen food before cooking, either by moving it from the freezer to the crisper drawer or by leaving it outside the refrigerator to thaw naturally. However, thawing food in the crisper drawer is very slow, and it may not be fully thawed by the time cooking time arrives. While thawing outside the refrigerator may take several hours, thawed food left at room temperature will spoil more quickly, losing nutrients and flavor, and even potentially causing food poisoning. Summary of the Invention

[0003] The purpose of this invention is to provide a refrigerator and a defrosting control method thereof, which sets up an independent defrosting zone in the refrigerator to defrost frozen food and improve the defrosting efficiency of food.

[0004] To achieve the above objectives, embodiments of the present invention provide a refrigerator, comprising:

[0005] A defrosting system for defrosting food includes a defrosting chamber, a heat exchanger, a condenser, an evaporator, a first throttling device, a second throttling device, and a third throttling device. The heat exchanger exchanges heat with the defrosting chamber. Refrigerant from the refrigerator's refrigeration system passes through the condenser; a portion flows into the heat exchanger through the first throttling device, while the other portion flows into the evaporator after merging with the refrigerant output from the heat exchanger via the third throttling device through the second throttling device.

[0006] A temperature acquisition device is installed inside the thawing chamber to obtain the thawing temperature of the thawing chamber;

[0007] The controller is configured as follows:

[0008] In response to the food defrosting command, the system acquires the target temperature set by the user and the defrosting temperature detected by the temperature acquisition device.

[0009] The target temperature and the preset thawing temperature are compared, and the opening degree of the first throttling device, the second throttling device and the third throttling device are controlled according to the comparison result.

[0010] As an improvement to the above solution, controlling the opening degree of the first throttling device, the second throttling device, and the third throttling device based on the comparison result includes:

[0011] When the thawing temperature is less than the difference between the target temperature and the preset thawing temperature difference, the first throttling device is controlled to be fully open, the second throttling device is controlled to be fully closed, and the third throttling device is controlled to be at a preset first opening degree.

[0012] During the thawing temperature rise process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference, and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be fully open, the second throttling device is controlled to be at a preset second opening degree, and the third throttling device is controlled to be at a preset third opening degree.

[0013] As an improvement to the above solution, the step of controlling the opening degree of the first throttling device, the second throttling device, and the third throttling device based on the comparison result further includes:

[0014] When the thawing temperature is greater than the sum of the target temperature and the preset thawing temperature difference, the first throttling device is controlled to be at the preset fourth opening degree, the second throttling device is controlled to be in the fully closed state, and the third throttling device is controlled to be in the fully open state.

[0015] During the thawing temperature reduction process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference, and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be at a preset fifth opening degree, the second throttling device is controlled to be at a preset sixth opening degree, and the third throttling device is controlled to be in a fully open state.

[0016] As an improvement to the above solution, the controller is further configured to:

[0017] When the thawing time is detected to have reached the preset thawing stop time, the thawing system is controlled to stop working.

[0018] As an improvement to the above solution, the thawing stop time is a thawing time preset by the user.

[0019] As an improvement to the above solution, the defrosting stop time is the defrosting time obtained by the controller based on the food to be defrosted in the defrosting chamber; therefore, when food to be defrosted is detected in the defrosting chamber, the controller is further configured to:

[0020] The food to be thawed in the thawing chamber is identified to obtain its information; wherein, the information includes the food type, weight, and storage time pre-stored in the food management system.

[0021] The corresponding thawing stop time is retrieved from the database based on the ingredient information.

[0022] To achieve the above objectives, this invention also provides a refrigerator defrosting control method, applicable to the defrosting system in a refrigerator. The defrosting system includes a defrosting chamber, a heat exchanger, a condenser, an evaporator, a first throttling device, a second throttling device, and a third throttling device. The heat exchanger is used for heat exchange with the defrosting chamber. Refrigerant from the refrigerator's refrigeration system, after passing through the condenser, flows partly into the heat exchanger through the first throttling device, and the other part flows through the second throttling device and merges with the refrigerant output from the heat exchanger via the third throttling device before flowing into the evaporator. Therefore, the refrigerator defrosting control method includes:

[0023] In response to the food defrosting command, the system obtains the target temperature set by the user and the defrosting temperature of the defrosting chamber;

[0024] The target temperature and the preset thawing temperature are compared, and the opening degree of the first throttling device, the second throttling device and the third throttling device are controlled according to the comparison result.

[0025] As an improvement to the above solution, controlling the opening degree of the first throttling device, the second throttling device, and the third throttling device based on the comparison result includes:

[0026] When the thawing temperature is less than the difference between the target temperature and the preset thawing temperature difference, the first throttling device is controlled to be fully open, the second throttling device is controlled to be fully closed, and the third throttling device is controlled to be at a preset first opening degree.

[0027] During the thawing temperature rise process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference, and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be fully open, the second throttling device is controlled to be at a preset second opening degree, and the third throttling device is controlled to be at a preset third opening degree.

[0028] As an improvement to the above solution, the step of controlling the opening degree of the first throttling device, the second throttling device, and the third throttling device based on the comparison result further includes:

[0029] When the thawing temperature is greater than the sum of the target temperature and the preset thawing temperature difference, the first throttling device is controlled to be at the preset fourth opening degree, the second throttling device is controlled to be in the fully closed state, and the third throttling device is controlled to be in the fully open state.

[0030] During the thawing temperature reduction process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference, and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be at a preset fifth opening degree, the second throttling device is controlled to be at a preset sixth opening degree, and the third throttling device is controlled to be in a fully open state.

[0031] Compared to existing technologies, the refrigerator and its defrosting control method disclosed in this invention include a defrosting system comprising a defrosting chamber, a condenser, a heat exchanger, a first throttling device, a second throttling device, and a third throttling device. The heat exchanger exchanges heat with the defrosting chamber. Refrigerant from the refrigerator's refrigeration system passes through the condenser; a portion flows into the heat exchanger through the first throttling device, while the other portion flows into the evaporator after merging with the refrigerant output from the heat exchanger via the third throttling device through the second throttling device. During operation, the defrosting system compares the user-set target temperature with the defrosting temperature of the defrosting chamber and controls the opening of the first, second, and third throttling devices based on the comparison result. By establishing an independent defrosting zone within the refrigerator, the defrosting efficiency of frozen food is improved. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the defrosting system in a refrigerator provided in an embodiment of the present invention;

[0034] Figure 3 This is a flowchart of a refrigerator defrosting control method provided in an embodiment of the present invention. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0036] See Figure 1This is a schematic diagram of a refrigerator 100 according to Embodiment 1 of the present invention. The refrigerator 100 includes a defrosting system 10, a temperature acquisition device 20, and a controller 30. The defrosting system 10 transfers heat or cold to the defrosting chamber by controlling the opening of a throttling device valve to defrost food. The temperature acquisition device 20 is located in the defrosting chamber of the defrosting system 10 and is used to acquire the defrosting temperature of the defrosting chamber. The controller 30 is used to control the defrosting system 10 to defrost food.

[0037] See Figure 2 The defrosting system 10 includes a defrosting chamber 11, a heat exchanger 12, a condenser 13, an evaporator 14, a first throttling device 15, a second throttling device 16, and a third throttling device 17. The heat exchanger 12 is used to exchange heat with the defrosting chamber 11. After passing through the condenser 13, part of the refrigerant from the refrigerator refrigeration system flows into the heat exchanger 12 through the first throttling device 15, and the other part flows into the evaporator 14 after passing through the second throttling device 16 and merging with the refrigerant output from the heat exchanger 12 through the third throttling device 17.

[0038] For example, the defrosting chamber 11 is a storage box on a refrigerator, with good heat insulation and adjustable internal temperature. The heat exchanger 12 is used to transfer heat or cold to the defrosting chamber. The heat exchanger 12 and the throttling device are connected to the refrigerator's refrigeration system, using the refrigerant in the refrigeration system to generate heat for defrosting. The throttling device in this invention includes three components: a first throttling device 15, a second throttling device 16, and a third throttling device 17. The throttling device is a component that controls the refrigerant flow rate and can be an electronically controlled flow valve.

[0039] By controlling the flow rate through three throttling devices, the cooling / heating function and heat exchange efficiency of the heat exchanger can be controlled. This process can be implemented by the controller 30. The temperature acquisition device 20 transmits the temperature of the defrosting chamber 11 to the controller 30 in real time. The controller 30 adjusts the opening degree of the three throttling devices according to the relationship between the user-set target temperature Tset and the defrosting temperature T of the defrosting chamber 11, so that the temperature inside the defrosting chamber 11 is maintained within the target temperature range. The controller 30 is configured as follows:

[0040] In response to the food defrosting command, the system acquires the target temperature set by the user and the defrosting temperature detected by the temperature acquisition device.

[0041] The target temperature and the preset thawing temperature are compared, and the opening degree of the first throttling device 15, the second throttling device 16 and the third throttling device 17 are controlled according to the comparison result.

[0042] In a preferred embodiment, controlling the opening degree of the first throttling device 15, the second throttling device 16, and the third throttling device 17 based on the comparison result includes:

[0043] When the thawing temperature is less than the difference between the target temperature and the preset thawing temperature difference, the first throttling device 15 is controlled to be fully open, the second throttling device 16 is controlled to be fully closed, and the third throttling device 17 is controlled to be at the preset first opening degree.

[0044] During the thawing temperature rise process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference, and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device 15 is controlled to be fully open, the second throttling device 16 is controlled to be at a preset second opening degree, and the third throttling device 17 is controlled to be at a preset third opening degree.

[0045] For example, assuming the target temperature error range is ±ΔT (i.e., the defrosting temperature difference), when T < Tset - ΔT, the first throttling device 15 is fully open, the second throttling device 16 is fully closed, and the third throttling device 17 is opened to an appropriate degree. At this time, the heat exchanger 12 acts as a condenser and is in a hot state. Heat is transferred to the defrosting chamber 11 through the heat exchanger 12, causing the temperature inside the defrosting chamber 11 to rise. As the defrosting temperature T continues to rise, when Tset - ΔT ≤ T ≤ Tset + ΔT, the first throttling device 15 is fully open, and the second throttling device 16 and the third throttling device 17 are opened to appropriate degrees. The second throttling device 16 becomes the main flow path for the refrigerant, and the third throttling device 17 becomes an auxiliary flow path. The rate at which the heat exchanger 12 releases heat to the defrosting chamber 11 decreases, and the temperature inside the defrosting chamber 11 changes slowly. By adjusting the opening of the second throttling device 16 and the third throttling device 17 as appropriate, the temperature of the defrosting chamber 11 can be maintained constant.

[0046] In another preferred embodiment, controlling the opening degree of the first throttling device 15, the second throttling device 16, and the third throttling device 17 based on the comparison result includes:

[0047] When the thawing temperature is greater than the sum of the target temperature and the preset thawing temperature difference, the first throttling device is controlled to be at the preset fourth opening degree, the second throttling device is controlled to be in the fully closed state, and the third throttling device is controlled to be in the fully open state.

[0048] During the thawing temperature reduction process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference, and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be at a preset fifth opening degree, the second throttling device is controlled to be at a preset sixth opening degree, and the third throttling device is controlled to be in a fully open state.

[0049] For example, when T > Tset + ΔT, the first throttling device 15 is opened to an appropriate degree, the second throttling device 16 is fully closed, and the third throttling device 17 is fully open. At this time, the heat exchanger 12 acts as an evaporator and is in a cold state. Heat is transferred from the defrosting chamber 11 to the heat exchanger 12, causing the temperature inside the defrosting chamber 11 to decrease. As the defrosting temperature T continues to decrease, when Tset - ΔT ≤ T ≤ Tset + ΔT, the first throttling device 15 and the second throttling device 16 are opened to appropriate degrees, and the third throttling device 17 is fully open. This makes the second throttling device 16 the main flow path for the refrigerant, and the first throttling device 15 the auxiliary flow path. The rate at which the heat exchanger 12 absorbs heat from the defrosting chamber 11 decreases, and the temperature inside the defrosting chamber 11 changes slowly. By appropriately adjusting the opening degrees of the first throttling device 15 and the third throttling device 17, the temperature inside the defrosting chamber 11 can be maintained constant.

[0050] It is worth noting that the opening degree from the first to the sixth can be set to any opening degree from fully open to fully closed, such as a half-open state. This invention does not impose any specific limitation on this.

[0051] Furthermore, the controller 30 is also configured to:

[0052] When the thawing time is detected to have reached the preset thawing stop time, the thawing system is controlled to stop working.

[0053] For example, the defrosting stop time is a user-preset defrosting time. After placing the food to be defrosted into the defrosting chamber 11, the user can set the target temperature and defrosting stop time through the control panel located outside the defrosting chamber 11. The timer starts when the defrosting system 10 begins defrosting, and defrosting stops when the defrosting time reaches the defrosting stop time.

[0054] Furthermore, the defrosting stop time is the defrosting time obtained by the controller based on the food to be defrosted in the defrosting chamber; therefore, when food to be defrosted is detected in the defrosting chamber, the controller is further configured to:

[0055] The food to be thawed in the thawing chamber is identified to obtain its information; wherein, the information includes the food type, weight, and storage time pre-stored in the food management system.

[0056] The corresponding thawing stop time is retrieved from the database based on the ingredient information.

[0057] For example, when the food to be thawed is food bound to an electronic tag, its information can be obtained by reading the electronic tag through an antenna. The thawing stop time can be calculated based on the food type, weight, and storage time. Thawing stop times corresponding to the current food type, weight, and storage time can be pre-stored in a database. Different types of food require different thawing times; heavier foods require longer thawing times, and longer-stored foods also require longer thawing times. Combining these three factors to determine the thawing stop time allows for a more accurate determination of the required thawing time, preventing issues such as incomplete thawing or excessively long thawing times that could negatively impact the food.

[0058] Compared to existing technologies, the refrigerator disclosed in this invention includes a defrosting system comprising a defrosting chamber, a condenser, a heat exchanger, a first throttling device, a second throttling device, and a third throttling device. The heat exchanger exchanges heat with the defrosting chamber. Refrigerant from the refrigerator's refrigeration system, after passing through the condenser, flows partly into the heat exchanger via the first throttling device, and the other part flows through the second throttling device and merges with the refrigerant output from the heat exchanger via the third throttling device before flowing into the evaporator. During operation, the defrosting system compares the user-set target temperature with the defrosting temperature of the defrosting chamber, and controls the opening of the first, second, and third throttling devices based on the comparison result. By using this invention, a separate defrosting zone is set within the refrigerator to defrost frozen food, improving defrosting efficiency.

[0059] See Figure 3 , Figure 3 This is a flowchart of a refrigerator defrosting control method provided by an embodiment of the present invention. The refrigerator defrosting control method is applicable to the defrosting system in a refrigerator. The defrosting system includes a defrosting chamber, a heat exchanger, a condenser, an evaporator, a first throttling device, a second throttling device, and a third throttling device. The heat exchanger is used for heat exchange with the defrosting chamber. Refrigerant from the refrigerator's refrigeration system, after passing through the condenser, flows partly into the heat exchanger through the first throttling device, and the other part flows into the evaporator after merging with the refrigerant output from the heat exchanger through the third throttling device via the second throttling device. Therefore, the refrigerator defrosting control method includes:

[0060] S1. In response to the food defrosting command, obtain the target temperature set by the user and the defrosting temperature of the defrosting chamber;

[0061] S2. Compare the target temperature with the preset thawing temperature, and control the opening degree of the first throttling device, the second throttling device and the third throttling device according to the comparison result.

[0062] Specifically, in step S2, controlling the opening degree of the first throttling device, the second throttling device, and the third throttling device based on the comparison result includes steps S21 to S22:

[0063] S21. When the thawing temperature is less than the difference between the target temperature and the preset thawing temperature difference, the first throttling device is controlled to be fully open, the second throttling device is controlled to be fully closed, and the third throttling device is controlled to be at a preset first opening degree.

[0064] S22. During the thawing temperature rise process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference, and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be fully open, the second throttling device is controlled to be at a preset second opening degree, and the third throttling device is controlled to be at a preset third opening degree.

[0065] Specifically, in step S2, controlling the opening degree of the first throttling device, the second throttling device, and the third throttling device based on the comparison result further includes steps S23 to S24:

[0066] S23. When the thawing temperature is greater than the sum of the target temperature and the preset thawing temperature difference, the first throttling device is controlled to be at the preset fourth opening degree, the second throttling device is controlled to be in the fully closed state and the third throttling device is controlled to be in the fully open state.

[0067] S24. During the thawing temperature reduction process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference, and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be at a preset fifth opening degree, the second throttling device is controlled to be at a preset sixth opening degree, and the third throttling device is controlled to be in a fully open state.

[0068] Specifically, the refrigerator defrosting control method further includes step S3:

[0069] S3. When the thawing time is detected to have reached the preset thawing stop time, the thawing system is controlled to stop working.

[0070] Specifically, the defrosting stop time is a user-preset defrosting time. Alternatively, the defrosting stop time is a defrosting time obtained by the controller based on the food to be defrosted in the defrosting chamber; then, when food to be defrosted is detected in the defrosting chamber, the defrosting control method further includes:

[0071] The food to be thawed in the thawing chamber is identified to obtain its information; wherein, the information includes the food type, weight, and storage time pre-stored in the food management system.

[0072] The corresponding thawing stop time is retrieved from the database based on the ingredient information.

[0073] It is worth noting that the working process of the refrigerator defrosting control method described in this embodiment can refer to the working process of the controller in the refrigerator described in the above embodiments, and will not be repeated here. The settings of the first to sixth opening degrees can be set to any opening degree from fully open to fully closed, such as setting it to a half-open state. This invention does not make specific limitations here.

[0074] Compared to existing technologies, the refrigerator defrosting control method disclosed in this invention includes a defrosting system in the refrigerator, comprising a defrosting chamber, a condenser, a heat exchanger, a first throttling device, a second throttling device, and a third throttling device. The heat exchanger exchanges heat with the defrosting chamber. Refrigerant from the refrigerator's refrigeration system, after passing through the condenser, flows partly into the heat exchanger through the first throttling device, and the other part flows through the second throttling device and merges with the refrigerant output from the heat exchanger via the third throttling device before flowing into the evaporator. During operation of the defrosting system, the target temperature set by the user and the defrosting temperature of the defrosting chamber are compared, and the opening degrees of the first, second, and third throttling devices are controlled based on the comparison result. By setting up an independent defrosting zone in the refrigerator to defrost frozen food, the defrosting efficiency of food is improved.

[0075] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator characterized by comprising: The method comprises the following steps: An unfreezing system is used to unfreeze food, which comprises an unfreezing cavity, a heat exchanger, a condenser, an evaporator, a first throttling device, a second throttling device and a third throttling device; wherein the heat exchanger is used to exchange heat with the unfreezing cavity, and a part of refrigerant from a refrigerator refrigerating system flows into the heat exchanger through the first throttling device after passing through the condenser, and another part flows into the evaporator after passing through the second throttling device and being combined with refrigerant output from the heat exchanger through the third throttling device; A temperature collecting device is arranged in the unfreezing cavity and used to obtain an unfreezing temperature of the unfreezing cavity; The controller is configured to: obtain a target temperature set by a user and the unfreezing temperature detected by the temperature collecting device in response to a food unfreezing instruction; compare the target temperature with a preset unfreezing temperature, and control the opening degrees of the first throttling device, the second throttling device and the third throttling device according to the comparison result.

2. The refrigerator according to claim 1, wherein The control of the opening degrees of the first throttling device, the second throttling device and the third throttling device according to the comparison result comprises: when the unfreezing temperature is less than the difference between the target temperature and a preset unfreezing temperature difference, the first throttling device is controlled to be in a fully open state, the second throttling device is controlled to be in a fully closed state, and the third throttling device is controlled to be in a preset first opening degree; in the unfreezing temperature rising process, when the unfreezing temperature is greater than or equal to the difference between the target temperature and the unfreezing temperature difference, and less than or equal to the sum of the target temperature and the unfreezing temperature difference, the first throttling device is controlled to be in a fully open state, the second throttling device is controlled to be in a preset second opening degree, and the third throttling device is controlled to be in a preset third opening degree.

3. The refrigerator according to claim 1, wherein The control of the opening degrees of the first throttling device, the second throttling device and the third throttling device according to the comparison result further comprises: when the unfreezing temperature is greater than the sum of the target temperature and the preset unfreezing temperature difference, the first throttling device is controlled to be in a preset fourth opening degree, the second throttling device is controlled to be in a fully closed state, and the third throttling device is controlled to be in a fully open state; in the unfreezing temperature decreasing process, when the unfreezing temperature is greater than or equal to the difference between the target temperature and the unfreezing temperature difference, and less than or equal to the sum of the target temperature and the unfreezing temperature difference, the first throttling device is controlled to be in a preset fifth opening degree, the second throttling device is controlled to be in a preset sixth opening degree, and the third throttling device is controlled to be in a fully open state.

4. The refrigerator according to claim 2, wherein The controller is further configured to: control the unfreezing system to stop working when it is detected that an unfreezing time reaches a preset unfreezing stop time.

5. The refrigerator according to claim 4, wherein The unfreezing stop time is a user preset unfreezing time.

6. The refrigerator according to claim 4, wherein The unfreezing stop time is a corresponding unfreezing time obtained by the controller according to food to be unfreezed in the unfreezing cavity; then, when it is detected that food to be unfreezed is placed in the unfreezing cavity, the controller is further configured to: identify the food to be unfreezed in the unfreezing cavity to obtain food information of the food to be unfreezed; wherein the food information comprises a food type, a weight and a storage time of the food pre-stored in a food management system. According to the food information, a corresponding thawing stop time is obtained in a database.

7. A thawing control method of a refrigerator, characterized by, The thawing system suitable for the refrigerator comprises a thawing cavity, a heat exchanger, a condenser, an evaporator, a first throttling device, a second throttling device and a third throttling device. The heat exchanger is used for heat exchange with the thawing cavity. A part of refrigerant from a refrigeration system of the refrigerator flows into the heat exchanger through the first throttling device after passing through the condenser. Another part of the refrigerant flows into the evaporator after passing through the second throttling device and being combined with refrigerant output from the heat exchanger through the third throttling device. The thawing control method of the refrigerator comprises: In response to a thawing instruction of food, a target temperature set by a user and a thawing temperature of the thawing cavity are obtained. The target temperature is compared with a preset thawing temperature, and the opening degrees of the first throttling device, the second throttling device and the third throttling device are controlled according to a comparison result.

8. The thawing control method of a refrigerator according to claim 7, characterized in that, The control of the opening degrees of the first throttling device, the second throttling device and the third throttling device according to the comparison result comprises: When the thawing temperature is less than a difference between the target temperature and a preset thawing temperature difference, the first throttling device is controlled to be in a fully open state, the second throttling device is controlled to be in a fully closed state, and the third throttling device is controlled to be in a preset first opening degree. During the thawing temperature rising process, when the thawing temperature is greater than or equal to a difference between the target temperature and the thawing temperature difference and less than or equal to a sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be in a fully open state, the second throttling device is controlled to be in a preset second opening degree, and the third throttling device is controlled to be in a preset third opening degree.

9. The thawing control method of a refrigerator according to claim 7, characterized in that, The control of the opening degrees of the first throttling device, the second throttling device and the third throttling device according to the comparison result further comprises: When the thawing temperature is greater than the sum of the target temperature and the preset thawing temperature difference, the first throttling device is controlled to be in a preset fourth opening degree, the second throttling device is controlled to be in a fully closed state, and the third throttling device is controlled to be in a fully open state. During the thawing temperature decreasing process, when the thawing temperature is greater than or equal to the difference between the target temperature and the thawing temperature difference and less than or equal to the sum of the target temperature and the thawing temperature difference, the first throttling device is controlled to be in a preset fifth opening degree, the second throttling device is controlled to be in a preset sixth opening degree, and the third throttling device is controlled to be in a fully open state.

Images