Food micro-freezing preservation control methods, controllers and refrigerators

Abstract

This application provides a method, controller, and refrigerator for controlling the micro-freezing and preservation of food. The method includes: acquiring the current temperature of the food in the refrigerator's functional compartment; calculating the freezing difference based on the current temperature; if the freezing difference is greater than 0, controlling the functional compartment to operate according to a first preset value; outputting the supercooling result of the food based on the current temperature; if supercooling occurs, controlling the cooling mode of the functional compartment to turn off; acquiring the ambient temperature of the refrigerator when the current temperature is greater than or equal to a first temperature threshold; and controlling the functional compartment to operate according to a cyclical operation rule based on the ambient temperature, so that the functional compartment operates between the second preset value and the first temperature threshold. The above method combines the freezing difference and ambient temperature with compressor speed, damper opening angle, and fan speed to control the temperature of the functional compartment, and periodically stops cooling, ensuring an appropriate supply of cooling capacity to the functional compartment, reducing power consumption, and solving the problem of high refrigerator energy consumption during micro-freezing and storage of food.

Description

Technical Field

[0001] This application relates to the field of refrigerator micro-freezing and preservation technology, specifically to a method for controlling the micro-freezing and preservation of food, a controller, and a refrigerator. Background Technology

[0002] To keep food easy to cut and convenient for users, some refrigerators are equipped with a micro-freezing compartment. The refrigerator's controller uses sensors to collect the surface temperature of meat and other food items inside the compartment, determining whether the food is in the sensible heat cooling stage (surface temperature above the freezing point) or the latent heat maintenance stage (surface temperature near the freezing point). Based on this stage, the controller then executes a control program for the micro-freezing compartment. However, due to differences in the control process and the fact that some control methods do not integrate the food's temperature stage with compressor speed, damper opening, etc., the rapid cooling time in the sensible heat stage is long, resulting in relatively slow cooling of meat. Simultaneously, the food must maintain its temperature in the latent heat stage, causing the refrigerator's refrigeration system to run continuously, leading to higher energy consumption. Summary of the Invention

[0003] This application provides a method, controller, and refrigerator for controlling the micro-freezing and preservation of food, in order to solve the problem of high energy consumption in refrigerators when storing food in a micro-freezing state.

[0004] The first aspect of this application provides a method for controlling the micro-freezing and preservation of food ingredients, including:

[0005] Obtain the current temperature of the food inside the refrigerator's compartments;

[0006] The freezing difference of the food is calculated based on the current temperature; the freezing difference is the difference between the current temperature and the freezing point temperature of the food.

[0007] If the freezing difference is greater than 0, the functional room is controlled to operate according to the first preset value; the first preset value includes the first compressor speed, the first damper opening angle, and the first fan speed.

[0008] Based on the current temperature, output the supercooling result of the food; the supercooling result includes supercooling occurred and no supercooling occurred; supercooling occurred when the current temperature drops to a first temperature and then rises back to the freezing point temperature; the first temperature is the lowest temperature at which the food was supercooled;

[0009] If the overcooling result is that overcooling has occurred, then the cooling mode of the functional room is turned off to allow the temperature inside the functional room to rise.

[0010] When the current temperature is greater than or equal to a first temperature threshold, the ambient temperature of the refrigerator is obtained; the first temperature threshold is the highest temperature at which the food will not soften or thaw.

[0011] The functional compartments are controlled to operate according to a cyclic operation rule based on the ambient temperature. The cyclic operation rule includes: controlling the functional compartments to operate according to a second preset value based on the ambient temperature; turning off the cooling mode of the functional compartments when the current temperature is less than or equal to a second temperature threshold; and obtaining the ambient temperature of the refrigerator when the current temperature is greater than or equal to a first temperature threshold. The second temperature threshold is the lowest temperature at which the food is not frozen too hard. The second preset value includes a second compressor speed, a second damper opening angle, and a second fan speed. The second compressor speed is less than the first compressor speed, the second damper opening angle is less than the first damper opening angle, and the second fan speed is less than the first fan speed.

[0012] Optional, also includes:

[0013] If the freezing difference is less than or equal to 0, then the cooling mode of the functional room is turned off.

[0014] Until the current temperature is greater than or equal to the first temperature threshold, the ambient temperature of the refrigerator is obtained, and the functional compartments are controlled to operate according to the cycle operation rules.

[0015] Optional, also includes:

[0016] If the result of the overcooling is that no overcooling has occurred, then the functional room is continuously controlled to operate according to the first preset value.

[0017] Optional, also includes:

[0018] If the current temperature is greater than the second temperature threshold, the functional room will continue to operate according to the second preset value based on the ambient temperature.

[0019] Optionally, the first temperature is less than the second temperature threshold, the second temperature threshold is less than the freezing point temperature, and the freezing point temperature is less than the first temperature threshold.

[0020] Optionally, the first preset value is positively correlated with the freezing difference; the second preset value is positively correlated with the ambient temperature.

[0021] Optionally, the opening angle of the damper is 1-360°.

[0022] A second aspect of this application provides a controller applied to the control method described in the first aspect, the controller comprising:

[0023] Acquisition module: used to acquire the current temperature of food in the functional compartment of the refrigerator; and when the current temperature is greater than or equal to a first temperature threshold, acquire the ambient temperature of the refrigerator; the first temperature threshold is the highest temperature at which the food will not soften or thaw.

[0024] Calculation module: used to calculate the freezing difference of the food based on the current temperature; the freezing difference is the difference between the current temperature and the freezing point temperature of the food.

[0025] Judgment module: used to output the supercooling result of the food based on the current temperature; the supercooling result includes supercooling and no supercooling; supercooling is the process in which the current temperature drops to a first temperature and then rises back to the freezing point temperature; the first temperature is the lowest temperature at which the food is supercooled;

[0026] The control module is used to: control the functional compartment to operate according to a first preset value when the freezing difference is greater than 0; the first preset value includes a first compressor speed, a first damper opening angle, and a first fan speed; control the cooling mode of the functional compartment to be turned off when the overcooling result is overcooling, so that the temperature inside the functional compartment can rise; and control the functional compartment to operate according to a cyclic operation rule based on the ambient temperature; the cyclic operation rule includes: controlling the functional compartment to operate according to a second preset value based on the ambient temperature; controlling the cooling mode of the functional compartment to be turned off when the current temperature is less than or equal to a second temperature threshold; and obtaining the ambient temperature of the refrigerator when the current temperature is greater than or equal to the first temperature threshold; the second temperature threshold is the lowest temperature at which the food is not frozen too hard; the second preset value includes a second compressor speed, a second damper opening angle, and a second fan speed; the second compressor speed is less than the first compressor speed, the second damper opening angle is less than the first damper opening angle, and the second fan speed is less than the first fan speed.

[0027] A third aspect of this application provides a refrigerator, including a cabinet, a door, a functional compartment, a data acquisition module, and the controller described in the second aspect. The cabinet and the door are hinged together. The functional compartment is disposed inside the cabinet. The data acquisition module is disposed inside the functional compartment and on the outside of the cabinet. The controller is disposed on the top of the cabinet. The data acquisition module is communicatively connected to the controller.

[0028] As can be seen from the above technical solutions, this application provides a method, controller, and refrigerator for controlling the micro-freezing and preservation of food. The method includes: acquiring the current temperature of the food in the functional compartment of the refrigerator; calculating the freezing difference based on the current temperature; if the freezing difference is greater than 0, controlling the functional compartment to operate according to a first preset value; outputting the supercooling result of the food based on the current temperature; if supercooling occurs, controlling the cooling mode of the functional compartment to be turned off to allow the temperature in the functional compartment to rise; acquiring the ambient temperature of the refrigerator when the current temperature is greater than or equal to a first temperature threshold; controlling the functional compartment to operate according to a cyclic operation rule based on the ambient temperature, so that the functional compartment operates according to a second preset value between the second temperature threshold and the first temperature threshold. In the embodiments of this application, the freezing difference and ambient temperature are combined with the compressor speed, damper opening angle, and fan speed to control the functional compartment to first cool down rapidly and then cool down slowly, and to turn off the cooling mode of the functional compartment in a timely manner, so that the cooling capacity of the functional compartment is appropriate, the temperature fluctuation is small, and the power consumption is reduced, which can solve the problem of high refrigerator energy consumption when storing food in a micro-freezing state. At the same time, it can also keep the food in a micro-frozen and elastic state, which is not only easy to cut, but also extends the storage time of the food. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a flowchart of a food micro-freezing preservation control method provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the food micro-freezing and preservation control process provided in the embodiments of this application;

[0032] Figure 3 This is a schematic diagram of the cooling curve of the food micro-freezing preservation control method provided in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram of the controller structure provided in an embodiment of this application. Detailed Implementation

[0034] 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.

[0035] When the control program for the micro-freezing and preservation compartment is executed according to the stage of the food, due to different control processes and the fact that some control methods do not combine the temperature range of the food with the compressor speed, damper opening, etc., the rapid cooling time of the sensible heat section is long, the meat food cools down relatively slowly, and the food must maintain the temperature in the latent heat section, so the refrigerator's refrigeration module runs continuously, which leads to high energy consumption of the refrigerator.

[0036] To address the issue of high refrigerator energy consumption during food micro-freezing storage, some embodiments of this application provide a method for controlling food micro-freezing preservation. (See also...) Figure 1 , Figure 1 This is a flowchart illustrating a method for controlling the micro-freezing and preservation of food ingredients according to an embodiment of this application. The control method provided in this application includes:

[0037] S10: Obtain the current temperature of the food inside the refrigerator's functional compartment.

[0038] Understandably, the functional compartment is a fresh-keeping compartment with a micro-freezing function. The functional compartment is equipped with a data acquisition module to collect the current temperature of the food in real time and transmit the current temperature data to the refrigerator's controller.

[0039] S20: Calculate the freezing difference of the food based on the current temperature.

[0040] The freezing point difference is the difference between the current temperature and the freezing point temperature of the food. The freezing point temperature of the food refers to the temperature at which the water in the food changes from a liquid state to a solid state (i.e., freezing). The freezing point temperature of the food is related to factors such as the concentration of water, the type and concentration of solutes, etc. In this embodiment, the current temperature of the food is set as t, the freezing point temperature of the food is set as t0, and the freezing point difference is set as Δt, then Δt = t - t0. Different foods have different freezing point temperatures. Taking meat as an example, the freezing point temperature of meat is -1.7 to -2.2℃, and the freezing point difference of meat can be 0.5 to 3.5℃.

[0041] S30: If the freezing difference is greater than 0, the control function room will operate according to the first preset value.

[0042] The refrigerator controller stores different first preset values. Different freezing differences correspond to different first preset values. When the freezing difference is greater than 0, the controller outputs the corresponding first preset value based on the value of the freezing difference to control the functional compartments to operate according to the first preset value. The first preset value includes a first compressor speed, a first damper opening angle, and a first fan speed; that is, different freezing differences correspond to different compressor speeds, damper opening angles, and fan speeds. In some embodiments, the compressor is the compressor of the refrigerator refrigeration system, the damper is a damper that controls the airflow speed of the functional compartments separately, and the fan is a fan that controls the airflow speed of the functional compartments separately. In this embodiment, by combining the freezing difference with the compressor speed, damper opening angle, and fan speed, the cooling of the functional compartments is controlled. When the surface temperature of the food is detected to be above the freezing point temperature in the sensible heat exchange section, the compressor speed is increased, the damper opening angle is increased, and the fan speed is increased according to the freezing difference. This can increase the cooling speed of the food, allowing it to quickly cool down to near the freezing point, thereby quickly forming supercooling, reducing the refrigerator's energy consumption, and also allowing for more precise control of the temperature inside the functional compartments.

[0043] S40: Output the supercooling result of the food based on the current temperature.

[0044] Supercooling results include both occurring and not occurring. Since the temperature inside the functional room drops rapidly and then stabilizes, the food temperature will drop to its lowest point and then rise again. Supercooling can be understood as the process where the food's current temperature drops to a first temperature and then rises back to its freezing point temperature, where the first temperature is the lowest temperature at which supercooling occurs. After supercooling, the food is in a supercooled state, meaning its temperature has dropped below its freezing point temperature but without the formation of large ice crystals. When food is cooled below its freezing point but has not yet frozen, the lack of large ice crystals makes it easier for users to handle. Setting the first temperature as t1 means that t1 is less than t0.

[0045] S50: If the result of overcooling is that overcooling has occurred, the cooling mode of the control room will be turned off to allow the temperature inside the control room to rise.

[0046] Since the food has cooled down, the temperature inside the functional room is low. Therefore, the functional room no longer needs to operate at the first preset value. In order to reduce energy consumption, the cooling mode of the functional room can be turned off at this time, allowing the temperature inside the functional room to rise slowly.

[0047] S60: When the current temperature is greater than or equal to the first temperature threshold, obtain the ambient temperature of the refrigerator.

[0048] In this embodiment, the first temperature threshold is the highest temperature at which the food will not soften or thaw. As the temperature inside the functional compartment rises, the temperature of the food will also increase. When the current temperature of the food reaches the first temperature threshold, to avoid affecting the storage quality of the food, it is necessary to control the cooling operation of the functional compartment. At this time, the ambient temperature of the refrigerator can be obtained using a data acquisition module to control the cooling operation of the functional compartment based on the ambient temperature. Setting the first temperature threshold as t2 means that t2 is greater than t0.

[0049] S70: The control room operates according to the cyclic operation rule based on the ambient temperature.

[0050] The cyclic operation rules include: controlling the functional compartment to operate according to the second preset value based on the ambient temperature; turning off the cooling mode of the functional compartment when the current temperature is less than or equal to the second temperature threshold; and obtaining the ambient temperature of the refrigerator when the current temperature is greater than or equal to the first temperature threshold.

[0051] The refrigerator controller stores different second preset values. Different ambient temperatures correspond to different second preset values, allowing the controller to output the corresponding second preset value based on the ambient temperature, thereby controlling the functional compartments to operate according to the second preset values. In some embodiments, the second preset values ​​include the second compressor speed, the second damper opening angle, and the second fan speed; wherein the second compressor speed is lower than the first compressor speed, the second damper opening angle is lower than the first damper opening angle, and the second fan speed is lower than the first fan speed, meaning the cooling capacity supplied to the functional compartment at this time is less than the cooling capacity supplied when the functional compartment operates according to the first preset values. It can be understood that when the current temperature of the food is detected to be greater than or equal to a first temperature threshold, the functional compartment begins to cool down, and the cooling rate of the functional compartment operating according to the second preset values ​​is less than the cooling rate operating according to the first preset values.

[0052] The second temperature threshold is the lowest temperature at which the food will not freeze too hard. Setting the second temperature threshold to t3 means that t1 < t3 < t0 < t2. That is, after the food's current temperature t rises to t2, the control compartment operates between temperatures t2 and t3. During operation, as the food cools from t2 to t3, the control compartment operates according to the second preset value based on the ambient temperature. When the food temperature drops to t3, to save energy, the cooling mode of the control compartment can be turned off until the food temperature rises back to t2, at which point the cooling mode of the control compartment is turned on again to continue cooling. The above process of food temperature change can be found in [reference needed]. Figure 3 , Figure 3 This is a schematic diagram of the cooling curve of the food micro-freezing preservation control method provided in the embodiments of this application. Figure 3 The first stage is the process of steps S30-S60, and the second stage is the cyclical process in step S70.

[0053] In this embodiment, ambient temperature is combined with compressor speed, damper opening angle, and fan speed to control the cooling of the functional compartment. When the detection module detects that the surface temperature of the food has entered the latent heat exchange stage near the freezing point, the compressor speed, damper opening angle, and fan speed are controlled to decrease based on the collected ambient temperature. This ensures an appropriate supply of cooling capacity to the functional compartment, minimal temperature fluctuations, and reduced power consumption. Simultaneously, due to the small temperature fluctuations and low airflow, ice crystal formation on the food is reduced, and the food temperature remains within a moderately controlled temperature range near the freezing point, allowing the food to remain in a slightly frozen, elastic state that is easy to cut.

[0054] It should also be noted that in the above process, the first preset value is positively correlated with the freezing difference, and the second preset value is positively correlated with the ambient temperature. That is, the larger the freezing difference and the higher the ambient temperature, the greater the increase in compressor speed and fan speed, and the larger the damper opening angle. In the embodiments of this application, the damper opening angle is 1-360°.

[0055] See Figure 2 , Figure 2 This is a schematic diagram of the food micro-freezing and preservation control process provided in the embodiments of this application. In some embodiments, there are situations where the initial temperature of the food is lower than the first temperature t1. For example, if the food is frozen, and large ice crystals have formed on the surface, it must be thawed before cutting. When the food is placed in the functional compartment, the detection module detects that the current temperature of the food is much lower than the freezing point temperature t0, i.e., the freezing difference Δt is less than 0. At this time, cooling should be stopped in the functional compartment to reduce the hardness of the food to a state that is easy to cut. Therefore, the control method also includes:

[0056] If the freezing difference is less than or equal to 0, the cooling mode of the control compartment is turned off; until the current temperature is greater than or equal to the first temperature threshold, the ambient temperature of the refrigerator is obtained, and the control compartment is operated according to the cycle operation rule.

[0057] In some embodiments, the control method further includes: during the cooling process of the functional compartment, if the result of overcooling is no overcooling, then continuously controlling the functional compartment to operate according to a first preset value. During the cooling process of the food from t2 to t3, if the current temperature is greater than a second temperature threshold t3, then continuously controlling the functional compartment to operate according to the second preset value based on the ambient temperature.

[0058] This application also provides a controller in some embodiments, applied to the control methods provided in the above embodiments. See [link to relevant documentation]. Figure 4 , Figure 4 This is a schematic diagram of the controller structure provided in an embodiment of this application. The controller includes:

[0059] Acquisition module: used to acquire the current temperature of food in the refrigerator's functional compartment; and when the current temperature is greater than or equal to a first temperature threshold, acquire the ambient temperature of the refrigerator, where the first temperature threshold is the highest temperature at which the food will not soften or thaw.

[0060] Calculation module: used to calculate the freezing difference of food based on the current temperature; the freezing difference is the difference between the current temperature and the freezing point temperature of the food.

[0061] Judgment module: Used to output the supercooling result of the food based on the current temperature; the supercooling result includes supercooling and no supercooling; supercooling occurs when the current temperature drops to the first temperature and then rises back to the freezing point temperature; the first temperature is the lowest temperature at which the food is supercooled.

[0062] Control module: Used to control the functional compartment to operate according to a first preset value when the freezing difference is greater than 0; the first preset value includes the first compressor speed, the first damper opening angle, and the first fan speed; if the subcooling result is subcooling, the cooling mode of the functional compartment is turned off to allow the temperature inside the functional compartment to rise; and to control the functional compartment to operate according to a cyclic operation rule. The cyclic operation rule includes: controlling the functional compartment to operate according to a second preset value based on the ambient temperature; turning off the cooling mode of the functional compartment when the current temperature is less than or equal to a second temperature threshold; and obtaining the ambient temperature of the refrigerator when the current temperature is greater than or equal to the first temperature threshold. The second temperature threshold is the lowest temperature at which food will not be frozen too hard; the second preset value includes the second compressor speed, the second damper opening angle, and the second fan speed; the second compressor speed is less than the first compressor speed, the second damper opening angle is less than the first damper opening angle, and the second fan speed is less than the first fan speed.

[0063] This application also provides a refrigerator in some embodiments, including a cabinet, a door, a functional compartment, a data acquisition module, and a controller provided in the second aspect. The cabinet and the door are hinged together. The functional compartment is disposed inside the cabinet. The data acquisition module is disposed inside the functional compartment and on the outside of the cabinet. The controller is disposed on the top of the cabinet. The data acquisition module is communicatively connected to the controller. The data acquisition module is used to acquire the temperature of the food inside the functional compartment and the ambient temperature outside the refrigerator, and sends the acquired temperature data to the controller. In some embodiments, the data acquisition module may be one or more of a thermocouple, a thermistor, and an infrared sensor, and the number of such modules may be multiple.

[0064] As can be seen from the above technical solutions, this application provides a method, controller, and refrigerator for controlling the micro-freezing and preservation of food. The method includes: acquiring the current temperature of the food in the functional compartment of the refrigerator; calculating the freezing difference based on the current temperature; if the freezing difference is greater than 0, controlling the functional compartment to operate according to a first preset value; outputting the supercooling result of the food based on the current temperature; if supercooling occurs, controlling the cooling mode of the functional compartment to be turned off to allow the temperature in the functional compartment to rise; acquiring the ambient temperature of the refrigerator when the current temperature is greater than or equal to a first temperature threshold; controlling the functional compartment to operate according to a cyclic operation rule based on the ambient temperature, so that the functional compartment operates according to a second preset value between the second temperature threshold and the first temperature threshold. In this application embodiment, the freezing difference and ambient temperature are combined with the compressor speed, damper opening angle, and fan speed to control the functional compartment to first cool down rapidly and then cool down slowly, and to turn off the cooling mode of the functional compartment in a timely manner, so that the cooling capacity of the functional compartment is appropriate, the temperature fluctuation is small, and the power consumption is reduced, which can solve the problem of high refrigerator energy consumption when storing food in a micro-freezing mode.

[0065] 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 method for controlling the micro-freezing and preservation of food ingredients, characterized in that, include: Obtain the current temperature of the food inside the refrigerator's compartments; Calculate the freezing difference of the food ingredients based on the current temperature; The freezing difference is the difference between the current temperature and the freezing point temperature of the food ingredient; If the freezing difference is greater than 0, the functional room is controlled to operate according to the first preset value; the first preset value includes the first compressor speed, the first damper opening angle, and the first fan speed. Based on the current temperature, output the supercooling result of the food; the supercooling result includes supercooling occurred and no supercooling occurred; supercooling occurs when the current temperature drops to a first temperature and then rises back to the freezing point temperature. The first temperature is the lowest temperature at which the food becomes supercooled; If the overcooling result is that overcooling has occurred, then the cooling mode of the functional room is turned off to allow the temperature inside the functional room to rise. When the current temperature is greater than or equal to a first temperature threshold, the ambient temperature of the refrigerator is obtained; the first temperature threshold is the highest temperature at which the food will not soften or thaw. The functional rooms are controlled to operate according to a cyclical operation rule based on the ambient temperature. The cyclic operation rules include: controlling the functional compartment to operate according to a second preset value based on the ambient temperature; controlling the cooling mode of the functional compartment to be turned off when the current temperature is less than or equal to a second temperature threshold; obtaining the ambient temperature of the refrigerator when the current temperature is greater than or equal to a first temperature threshold; the second temperature threshold is the lowest temperature at which the food is not frozen too hard; the second preset value includes the second compressor speed, the second damper opening angle, and the second fan speed; the second compressor speed is less than the first compressor speed, the second damper opening angle is less than the first damper opening angle, and the second fan speed is less than the first fan speed.

2. The method for controlling the micro-freezing and preservation of food ingredients according to claim 1, characterized in that, Also includes: If the freezing difference is less than or equal to 0, then the cooling mode of the functional room is turned off. Until the current temperature is greater than or equal to the first temperature threshold, the ambient temperature of the refrigerator is obtained, and the functional compartments are controlled to operate according to the cycle operation rules.

3. The method for controlling the micro-freezing and preservation of food ingredients according to claim 1, characterized in that, Also includes: If the result of the overcooling is that no overcooling has occurred, then the functional room is continuously controlled to operate according to the first preset value.

4. The method for controlling the micro-freezing and preservation of food ingredients according to claim 1, characterized in that, Also includes: If the current temperature is greater than the second temperature threshold, the functional room will continue to operate according to the second preset value based on the ambient temperature.

5. The method for controlling the micro-freezing and preservation of food ingredients according to claim 1, characterized in that, The first temperature is less than the second temperature threshold, the second temperature threshold is less than the freezing point temperature, and the freezing point temperature is less than the first temperature threshold.

6. The method for controlling the micro-freezing and preservation of food ingredients according to claim 1, characterized in that, The first preset value is positively correlated with the freezing difference; the second preset value is positively correlated with the ambient temperature.

7. The method for controlling the micro-freezing and preservation of food ingredients according to claim 1, characterized in that, The opening angle of the damper is 1-360°.

8. A controller, characterized in that, The controller, applied to the control method according to any one of claims 1-7, comprises: Acquisition module: used to acquire the current temperature of food in the functional compartment of the refrigerator; and when the current temperature is greater than or equal to a first temperature threshold, acquire the ambient temperature of the refrigerator; the first temperature threshold is the highest temperature at which the food will not soften or thaw. Calculation module: used to calculate the freezing difference of the food based on the current temperature; the freezing difference is the difference between the current temperature and the freezing point temperature of the food. Judgment module: used to output the supercooling result of the food based on the current temperature; the supercooling result includes supercooling and no supercooling; supercooling is the process in which the current temperature drops to a first temperature and then rises back to the freezing point temperature; the first temperature is the lowest temperature at which the food is supercooled; The control module is used to: control the functional compartment to operate according to a first preset value when the freezing difference is greater than 0; the first preset value includes a first compressor speed, a first damper opening angle, and a first fan speed; control the cooling mode of the functional compartment to be turned off when the overcooling result is overcooling, so that the temperature inside the functional compartment can rise; and control the functional compartment to operate according to a cyclic operation rule based on the ambient temperature; the cyclic operation rule includes: controlling the functional compartment to operate according to a second preset value based on the ambient temperature; controlling the cooling mode of the functional compartment to be turned off when the current temperature is less than or equal to a second temperature threshold; and obtaining the ambient temperature of the refrigerator when the current temperature is greater than or equal to the first temperature threshold; the second temperature threshold is the lowest temperature at which the food is not frozen too hard; the second preset value includes a second compressor speed, a second damper opening angle, and a second fan speed; the second compressor speed is less than the first compressor speed, the second damper opening angle is less than the first damper opening angle, and the second fan speed is less than the first fan speed.

9. A refrigerator, characterized in that, The device includes a housing, a door, functional rooms, a data acquisition module, and a controller as described in claim 8. The housing is hinged to the door, the functional rooms are located inside the housing, the data acquisition module is located inside the functional rooms and outside the housing, the controller is located on the top of the housing, and the data acquisition module is communicatively connected to the controller.

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