WO2021068771A1

WO2021068771A1 - Food storage control method, apparatus and device in refrigerator chamber, and refrigerator system

Info

Publication number: WO2021068771A1
Application number: PCT/CN2020/117998
Authority: WO
Inventors: 胡卓鸣; 辛海亚; 钱梅双
Original assignee: 合肥晶弘电器有限公司; 珠海格力电器股份有限公司
Priority date: 2019-10-11
Filing date: 2020-09-27
Publication date: 2021-04-15

Abstract

A food storage control method, apparatus and device in a refrigerator chamber, and a refrigerator system. The temperature of a chamber of a refrigerator is controlled to be maintained at a first overcooling temperature for a first preset duration. The temperature of the chamber of the refrigerator is controlled to be maintained at a second overcooling temperature for a second preset duration. The temperature of the chamber of the refrigerator is maintained at a set freezing temperature. The first overcooling temperature is greater than or equal to the second overcooling temperature, the second overcooling temperature is greater than or equal to the set freezing temperature, the first overcooling temperature is greater than zero degrees Celsius, and the set freezing temperature is less than zero degrees Celsius.

Description

Indoor food storage control method, device, equipment and refrigerator system in refrigerator room

Related application

This application requires the application on October 11, 2019, the application number is 201910963919.3, the name is "the method, device, equipment and refrigerator system for the supercooling storage of food in the refrigerator" and the application on October 11, 2019, the application number is 201910963923 .X, the name is "the control method, device, equipment and refrigerator system for food storage in the refrigerator room" and the application on October 11, 2019, the application number is 201910963951.1, the name is "the food storage control method, device, equipment and The priority of the Chinese patent application for "Refrigerator System" is hereby incorporated by reference in its entirety.

Technical field

This application relates to the technical field of household appliances, and in particular to a method, device, equipment and refrigerator system for controlling indoor food storage in a refrigerator room.

Background technique

The refrigerator is a kind of refrigeration equipment that keeps a constant low temperature. Since most of the ingredients are not perishable at low temperatures and have a long storage time, the refrigerator has become a household appliance used to keep fresh ingredients in most households, giving people daily life. Brings convenience. When the refrigerator freezes food, many large ice crystals are formed inside the food, which destroys the food cells, and also causes a large amount of blood to flow out after the food is thawed, resulting in the loss of nutrients and the taste of the food.

The traditional method of freezing food is to control the temperature drop of the food through the change of air volume, so that the food is changed from the supercooled state to the frozen state, thereby reducing the ice crystals inside the food. Then, this method controls the temperature drop of the food through the change of the air volume, which will cause a large difference in the temperature inside and outside the food, causing adverse effects such as freezing and burning. The direct influence of the air volume on the food will also cause serious drying of the food surface, which will affect the quality of the food. The storage effect of the refrigerator is poor.

Application content

In view of this, the present application discloses a method, device, equipment and refrigerator system for controlling indoor food storage in a refrigerator room.

In one embodiment, a method for controlling indoor food storage in a refrigerator room includes the following steps:

Controlling the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset period of time;

Controlling the temperature of the compartment of the refrigerator to maintain the second subcooling temperature for a second preset period of time;

Control the temperature of the compartment of the refrigerator to the set freezing temperature;

The first subcooling temperature is greater than or equal to the second subcooling temperature, the second subcooling temperature is greater than or equal to the set freezing temperature, and the first subcooling temperature is greater than zero degrees Celsius, the The set freezing temperature is less than zero degrees Celsius.

In one embodiment, a food storage control device in a refrigerator room includes:

The first-stage control module is used to control the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset period of time;

The second-stage control module is used to control the temperature of the compartment of the refrigerator to maintain the second subcooling temperature for a second preset period of time;

The third-stage control module is used to control the temperature of the compartment of the refrigerator to the set freezing temperature;

In one embodiment, a food storage control device in a refrigerator room includes a refrigeration device, a temperature detection device, and a control device. The refrigeration device and the temperature detection device are both connected to the control device, and the temperature detection device is provided with In the refrigerator compartment, the temperature detection device is used to detect the temperature in the refrigerator compartment and send it to the control device, the refrigeration device is used to cool the refrigerator compartment, and the control device is used to execute the above-mentioned embodiment. The indoor food storage control method of the refrigerator room is controlled.

In one embodiment, a refrigerator system includes a refrigerator and the indoor food storage control device in the refrigerator room described in the above embodiments.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from the disclosed drawings without creative work.

Fig. 1 is a flowchart of a method for controlling indoor food storage in a refrigerator in an embodiment.

Fig. 2 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Fig. 3 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Fig. 4 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Fig. 5 is a structural block diagram of an indoor food storage control device in a refrigerator room in an embodiment.

Fig. 6 is a graph showing the temperature change of food in an embodiment.

Fig. 7 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Fig. 8 is a flowchart of a method for controlling indoor food storage in a refrigerator room in an embodiment.

Fig. 9 is a flowchart of a method for controlling indoor food storage in a refrigerator room in another embodiment.

Fig. 10 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Fig. 11 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Fig. 12 is a graph showing the temperature change of food in an embodiment.

Fig. 13 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Fig. 14 is a flowchart of a method for controlling indoor food storage in a refrigerator room in an embodiment.

Fig. 15 is a flowchart of a method for controlling indoor food storage in a refrigerator room in another embodiment.

Fig. 16 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Fig. 17 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Figure 18 is a structural diagram of a sealed drawer in an embodiment.

Figure 19 is a structural diagram of a sealed drawer in another embodiment.

Figure 20 is a structural diagram of a sealed drawer in yet another embodiment.

Fig. 21 is a graph showing the temperature change of food in an embodiment.

Fig. 22 is a flowchart of a method for controlling indoor food storage in a refrigerator in another embodiment.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application. In order to make the objectives, technical solutions, and advantages of this application clearer and clearer, the following examples are used in conjunction with the drawings to further describe this application in detail. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

In this application, the use of ordinal terms such as "first", "second", etc. to modify elements does not indicate any priority, order, or order of one element relative to another element, or the performance of an action in a method. Chronologically. Unless specifically stated otherwise, such ordinal numbers are only used as labels to distinguish one element with a specific name from another element with the same name (except for the ordinal number). For example, the "first subcooling temperature" may be named so as to only distinguish it from, for example, the "second subcooling temperature". Just using the ordinal numbers "first" and "second" before the term "supercooling temperature" does not indicate any other relationship between the two supercooling temperatures, nor does it mean any relationship between any one or two supercooling temperatures. Other characteristics.

In one embodiment, the present application provides a method for controlling indoor food storage in a refrigerator room, which includes the following steps:

Controlling the temperature of the compartment of the refrigerator to a set freezing temperature, and the set freezing temperature includes a first freezing temperature and a second freezing temperature;

In one embodiment, referring to FIG. 1, there is provided a method for controlling indoor food storage in a refrigerator room. The method includes the following steps:

Step S200: controlling the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset period of time.

The compartment of the refrigerator is used to store food. In some embodiments, the changing room of the refrigerator is used to store food. In some embodiments, a single compartment of the refrigerator is used to store food, and the food can be refrigerated. The compartment is used as a sub-cooling function zone, a functional drawer is set to place food, a temperature detection device is installed in the compartment or the functional drawer for temperature detection, and an evaporator is installed in the compartment or the functional drawer for cooling. In some embodiments, the number of compartments is not fixed, and two or more compartments are provided to achieve different functions. In some embodiments, the structure of the compartment is not fixed, and more than two drawers are arranged in the compartment to store different types of food separately to avoid mutual influence of food taste and improve food quality.

Among them, the temperature of the compartment of the refrigerator is achieved by adjusting the speed of the compressor to control the rate of heat absorption by the refrigerant in the evaporator. In some embodiments, a control device is used to control the speed of the compressor. In some embodiments, the control device is the original main control unit of the refrigerator. In some embodiments, the control device uses a separate controller to control the temperature of the refrigerator compartment. The control device adjusts the rate of heat absorption of the refrigerant in the evaporator by controlling the speed of the compressor, thereby realizing the adjustment of the temperature of the refrigerator compartment. In some embodiments, the refrigerant flowing in the evaporator of the refrigerator is a high-pressure unstable liquid. When passing through the evaporator, the liquid high-pressure liquid refrigerant will vaporize and become a high-pressure gas. The refrigerant vaporization process will absorb a large amount of heat from the outside, that is, the compartment, so that the temperature in the compartment will decrease. In some embodiments, the evaporator is arranged in the compartment, and the control device adjusts the rate of heat absorption by the refrigerant in the evaporator by controlling the rotation speed of the compressor, thereby controlling the degree of refrigeration and controlling the temperature of the compartment. The faster the compressor speed, the greater the amount of refrigerant passing through the evaporator, and the faster the refrigerator will cool down, and vice versa.

The first subcooling temperature is greater than zero degrees Celsius, and the specific values of the first subcooling temperature and the first preset duration are not unique, and can be selected according to actual needs. In some embodiments, controlling the temperature of the refrigerator compartment at the first subcooling temperature to maintain the first preset period of time is to control the actual temperature of the compartment to fluctuate up and down the first subcooling temperature and maintain the corresponding period of time to complete the refrigerator The food stored in the medium enters the first stage of the supercooling mode, so that the warm food just put in the refrigerator is pre-cooled to the first supercooling temperature above 0℃, avoiding the uneven temperature inside and outside the food caused by direct rapid cooling , And the food state is unstable and unable to reach the supercooled state, which is conducive to improving the quality of food.

Step S400: controlling the temperature of the compartment of the refrigerator to maintain the second subcooling temperature for a second preset period of time.

After the first stage of the supercooling mode is completed, the control device enters the second stage of the supercooling mode, and controls the temperature of the compartment of the refrigerator to maintain the second supercooling temperature for a second preset period of time. Similarly, the speed of the compressor is controlled to adjust the heat absorption rate of the refrigerant in the evaporator to adjust the temperature of the refrigerator compartment, so as to maintain the temperature of the compartment at the second subcooling temperature.

The specific values of the second subcooling temperature and the second preset duration are not unique. In some embodiments, the second subcooling temperature may include multiple ones. In the second stage of the supercooling mode, the control device gradually reduces the temperature of the compartment from greater than zero degrees Celsius to less than zero degrees Celsius, and slowly cools the food through temperature control to make the food enter the supercooled state. In some embodiments, the temperature of the compartment is maintained at the second subcooling temperature for a second preset period of time, and the actual temperature of the compartment is controlled to fluctuate up and down at the second subcooling temperature and maintained for a corresponding period of time. By passing the food through the first and second phases of the cooling mode, the food is slowly cooled to below its freezing point and enters the supercooled state steadily.

Step S600: Control the compressor to run at the maximum allowable rotation speed and maintain the third preset duration.

In some embodiments, the maximum allowable rotation speed refers to the maximum rotation speed that can be reached under the premise of ensuring the safe operation of the compressor. The specific value set or the limit rotation speed range determined according to the compressor working condition and user needs, etc. Any value within the range can be regarded as the maximum allowable speed.

The specific value of the third preset duration is not unique, and its specific value can be determined according to actual needs. When the compressor is working at the maximum allowable speed, the amount of refrigerant passing through the evaporator is large, so the amount of evaporating refrigerant is large, and the cooling speed of the refrigerator compartment is very fast. By controlling the compressor to run at the maximum allowable speed, and maintaining the third The preset time allows the food in the refrigerator compartment to quickly release the supercooled state and enter the frozen state. Through the rapid decrease in temperature, the food is released from the supercooled state and quickly passes through the largest ice crystal generation area, which is conducive to the formation of tiny ice crystals of uniform size inside the food. Thereby, the damage to the internal cells of the food is reduced, and the nutrition and taste of the food are better protected.

Step S800: Maintain the temperature of the compartment of the refrigerator at the set freezing temperature.

After the second stage of the supercooling mode is completed, the control device enters the freezing mode, and continues to cool the refrigerator compartment by continuing to control the refrigerant in the evaporator to absorb heat, so that the temperature of the refrigerator compartment continues to decrease to a setting of less than zero degrees Celsius The freezing temperature of the refrigerator is controlled and the temperature of the refrigerator compartment is maintained at the set freezing temperature.

In some embodiments, the specific value of the set freezing temperature is not unique, and only needs to be less than zero degrees Celsius. In some embodiments, maintaining the temperature of the compartment at the set freezing temperature is to control the actual temperature of the compartment to fluctuate up and down the set freezing temperature. Since the super-cooled state of food is an unstable critical state, and the food in the super-cooled state cannot be stored for a long time, the temperature of the refrigerator compartment is controlled to maintain the set freezing temperature to make the food from the super-cooled state Converting to a frozen state is conducive to the formation of tiny ice crystals of uniform size inside the food, thereby reducing the damage to the internal cells of the food, so that the nutrition and taste of the food are better protected, and the food in the frozen state is more conducive to long-term Storage.

The embodiment of the method for controlling food storage in a refrigerator compartment sequentially controls the temperature of the compartment of the refrigerator to maintain the first subcooling temperature and the second subcooling temperature, and slowly cools down through temperature control to ensure that the food enters the supercooled state. Then control the compressor to run at the maximum allowable speed to cool the refrigerator ultra-fast, shorten the time for the food in the refrigerator to pass through the maximum ice crystal formation zone, and help the formation of small ice crystals of uniform size inside the food, thereby reducing the damage to the internal cells of the food , So that the nutrition and taste of the food are better protected, and finally the temperature of the refrigerator compartment is maintained at the set freezing temperature, which is conducive to the long-term storage of the food. By adjusting the speed of the compressor, the rate of heat absorption by the refrigerant in the evaporator is controlled to achieve refrigeration, without blowing, avoiding the adverse effects of cold air on the food such as drying and freezing, ensuring the quality of food, and improving the food storage effect of the refrigerator.

In one embodiment, referring to FIG. 2, step S200 includes step S210.

Step S210: Control the difference between the actual temperature of the compartment of the refrigerator and the first subcooling temperature to be less than or equal to the first temperature floating value, and maintain the first preset duration.

In some embodiments, according to the first supercooling temperature F1 and the first temperature floating value Δ1, the temperature maintenance range F1±Δ1 in the first stage of the supercooling mode is determined. In the first stage of the supercooling mode, the control device controls the actual temperature of the compartment to be kept within the temperature maintenance range F1±Δ1 for the first preset time period t1. Among them, the first subcooling temperature F1 is greater than or equal to 2°C and less than or equal to 5°C, the first preset time period t1 is greater than or equal to 3h and less than or equal to 6h, and the first temperature fluctuation value Δ1 is greater than or equal to 0°C and less than or Equal to 3°C.

In one embodiment, the second supercooling temperature includes more than two sub-stage temperature thresholds, and the second preset duration includes two or more sub-stage durations. Please refer to FIG. 2. Step S400 includes step S410.

Step S410: Control the temperature of the compartment of the refrigerator to gradually cool down in each sub-stage according to the temperature threshold of each sub-stage, and maintain the corresponding sub-stage duration in each sub-stage.

The second stage of the super-cooling mode is divided into multiple sub-stages. The control device controls the actual temperature of the compartment in each sub-stage to maintain the temperature threshold of the corresponding sub-stage, and makes the temperature of the compartment gradually drop in each sub-stage to complete the food The slow cooling of the food causes the food to enter a supercooled state.

In some embodiments, the number of sub-stage temperature thresholds is not unique. The more the number of temperature thresholds in the sub-stage, the slower the cooling process of the food, and the more precise the temperature control of the food. In some embodiments, the number of sub-stage durations is not unique, and is determined according to factors such as user storage needs and food types.

Further, in one embodiment, referring to FIG. 3, step S410 includes step S412.

Step S412: Control the difference between the actual temperature of the compartment of the refrigerator in each sub-stage and the temperature threshold of the sub-stage to be less than or equal to the second temperature floating value, and maintain the corresponding sub-stage duration.

In some embodiments, according to the sub-stage temperature threshold F2i and the second temperature floating value Δ2, the temperature maintenance range F2i±Δ2 of each sub-stage in the second stage of the supercooling mode is determined. In each sub-stage, the actual temperature of the control compartment of the control device is maintained within the corresponding temperature maintenance range F2i±Δ2, and continues for the corresponding sub-stage time t2i. Among them, the sub-stage temperature threshold F2i of each sub-stage is successively decreased, and is greater than or equal to -5°C, less than or equal to 2°C, the sub-stage duration t2i is greater than or equal to 1h, less than or equal to 2h, and the second temperature fluctuation value Δ2 is greater than or Equal to 0°C, less than or equal to 2°C.

In one embodiment, the second temperature fluctuation value is less than the first temperature fluctuation value. In the second stage of the supercooling mode, set a second temperature fluctuation value smaller than the first temperature fluctuation value corresponding to the first stage of the supercooling mode, so that the temperature control of the second stage of the supercooling mode is better than that of the first stage of the cooling mode. The temperature control of the stage is more precise. Since the food enters the already-cooled stage in the second stage of the super-cooling mode, a small temperature fluctuation value is set to ensure that the food remains in the super-cooled state.

In one embodiment, the third preset duration is greater than or equal to 2h and less than or equal to 5h, and the set freezing temperature is greater than or equal to -18°C and less than or equal to -5°C. Setting the third preset duration within the duration range of 2h-5h can ensure the effective working time of the compressor running at the maximum allowable rotation speed, thereby ensuring the strong refrigeration effect of the refrigerator. The set freezing temperature is greater than or equal to -18°C and less than or equal to -5°C. In some embodiments, the set freezing temperature is equal to -18°C, and the target temperature of the refrigerator compartment is -18°C. By setting a very low temperature, the control device controls the compressor to run with the maximum allowable parameters, so that the refrigeration system of the refrigerator reaches the maximum refrigeration parameters, so that the indoor temperature of the function room drops rapidly, and the food is quickly transformed from the supercooled state to the frozen state. State, so that the time for food to pass through the largest ice crystal formation area is greatly shortened, which is conducive to improving the quality of food.

In one embodiment, controlling the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for the first preset period of time corresponds to the compressor rotating speed corresponding to the first rotating speed, the first rotating speed being greater than or equal to 3500 rpm and less than or equal to 4500 rpm; controlling the refrigerator The compressor rotation speed corresponding to the temperature of the compartment maintained at the second subcooling temperature for a second preset period of time is the second rotation speed, and the second rotation speed is greater than or equal to 1200 rpm and less than or equal to 1800 rpm.

In some embodiments, the first rotation speed is greater than the second rotation speed, and the specific values of the first rotation speed and the second rotation speed are not unique, and only need to be within the above rotation speed range. In the first stage of the subcooling mode, the control device controls the compressor to run at the first rotation speed, and in the second stage of the subcooling mode, the control device controls the compressor to run at the second rotation speed. Since in the first stage of the supercooling mode, the food changes from the warm state before being put into the refrigerator to the first supercooling temperature, and the temperature difference is relatively large. Therefore, the value of the first rotation speed is relatively large, which is beneficial for realizing rapid cooling of food and improving work efficiency. In the second stage of the supercooling mode, the temperature of the food changes from the first supercooling temperature to the second supercooling temperature, and the temperature difference is small. Therefore, the second rotation speed is smaller and smaller than the first rotation speed. When the second stage of the super-cooling mode includes multiple sub-stages, it is beneficial to realize the precise control of the temperature in the multiple sub-stages and improve the accuracy of the work.

In one embodiment, referring to FIG. 4, before step S200, the method for controlling food storage in a refrigerator compartment may further include step S100.

Step S100: Determine whether the refrigerator is in a defrosting mode. When the refrigerator is in the defrosting mode, step S200 is performed after the defrosting mode is completed. When the refrigerator is not in the defrosting mode, stop and start the defrosting program until the first and second stages of the overcooling mode are completed, and the freezing mode is completed.

In some embodiments, the control device may determine whether the refrigerator is currently in the defrosting mode according to the operating state parameters of the refrigerator. When the refrigerator is in the defrosting mode, it waits for the defrosting operation to be completed and then performs the food supercooling operation. When the refrigerator is not in the defrosting mode, starting the defrosting operation is prohibited until the first and second phases of the supercooling mode are completed, and the first phase of the freezing mode is completed. As the refrigerator enters the defrosting stage, the temperature of each compartment of the refrigerator will rise, which will affect the normal operation of the program. Therefore, when the refrigerator is not in the defrosting mode, the food is controlled to enter the supercooling mode, which avoids the influence of temperature changes in the defrosting mode on the temperature of the refrigerator compartment, and improves the reliability of food storage.

In one embodiment, the present application provides an indoor food storage control device in a refrigerator room, which includes a first-stage control module 200, a second-stage control module 400, and a freezing control module. The first-stage control module 200 is used to control the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset time period. The second stage control module 400 is used to control the temperature of the compartment of the refrigerator to maintain the second subcooling temperature for a second preset period of time. The freezing control module is used to control the temperature of the compartment of the refrigerator to the set freezing temperature. The first subcooling temperature is greater than or equal to the second subcooling temperature, the second subcooling temperature is greater than or equal to the set freezing temperature, and the first subcooling temperature is greater than zero degrees Celsius, the The set freezing temperature is less than zero degrees Celsius.

In one embodiment, referring to FIG. 5, the freezing control module of the indoor food storage control device in the refrigerator room includes a third-stage control module 600 and a fourth-stage control module 800. The third-stage control module 600 is used to control the compressor to run at the maximum allowable rotation speed and maintain a third preset period of time. The fourth-stage control module 800 is used to maintain the temperature of the compartment of the refrigerator at the set freezing temperature. Among them, the temperature of the refrigerator compartment is achieved by adjusting the compressor speed to control the rate of heat absorption by the refrigerant in the evaporator; the first subcooling temperature is greater than or equal to the second subcooling temperature, and the second subcooling temperature is greater than or equal to the set point And the first subcooling temperature is greater than zero degrees Celsius, and the set freezing temperature is less than zero degrees Celsius.

In one embodiment, the first stage control module 200 controls the difference between the actual temperature of the compartment of the refrigerator and the first subcooling temperature to be less than or equal to the first temperature floating value, and maintains the first preset duration.

In one embodiment, the second supercooling temperature includes more than two sub-stage temperature thresholds, the second preset duration includes two or more sub-stage durations, and the second-stage control module 400 according to the temperature thresholds of each sub-stage Control the temperature of the compartment of the refrigerator to gradually cool down in each sub-stage, and maintain the corresponding sub-stage duration in each sub-stage.

In one embodiment, the second-stage control module 400 controls the difference between the actual temperature of the refrigerator compartment in each sub-stage and the sub-stage temperature threshold to be less than or equal to the second temperature floating value, and maintains the corresponding sub-stage duration.

In an embodiment, the device for controlling indoor food storage in a refrigerator room further includes a defrosting detection module. The defrosting detection module is used for controlling the temperature of the compartment of the refrigerator in the first stage to determine whether the refrigerator is in the defrosting mode before the first supercooling temperature is maintained for the first preset time period. When the refrigerator is in the defrosting mode, the first stage control module is controlled to control the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for the first preset time period. When the refrigerator is not in the defrosting mode, stop and start the defrosting program until the first and second stages of the overcooling mode are completed, and the freezing mode is completed.

In one embodiment, the present application also provides an indoor food storage control device in a refrigerator room, including a refrigeration device, a temperature detection device, and a control device. The refrigeration device and the temperature detection device are both connected to the control device, and the temperature detection device is arranged in the refrigerator room. The temperature detection device is used to detect the temperature in the refrigerator compartment and send it to the control device, the refrigeration device is used to cool the refrigerator compartment, and the control device is used to execute the above-mentioned method for control.

In one embodiment, the refrigeration device includes a compressor, a solenoid valve and an evaporator, the compressor is connected to the evaporator through the solenoid valve, and both the compressor and the solenoid valve are connected to the control device.

In some embodiments, the control device adjusts the speed of the compressor by controlling the speed at which the refrigerant in the evaporator absorbs heat. In this embodiment, the control device does not need to control the opening degree of the solenoid valve, thereby simplifying the working process. The compressor and solenoid valve can control the degree of heat absorption of the refrigerant in the evaporator, and can adjust the temperature of the refrigerator compartment. In some embodiments, the control device does not need to control the air volume of the air door of the refrigerator, which not only simplifies the control program of the refrigerator, but also makes the temperature of the compartment more uniform due to the constant air volume, so that the refrigeration effect of the food in different positions of the compartment is consistent. In addition, the change in air volume is reduced and the air-drying of the food is controlled, which is beneficial to improve the quality of the stored food.

In one embodiment, the temperature detection device is a thermocouple temperature sensor. The thermocouple temperature sensor is simple in structure, low in use cost, and the detection result is prepared, and it can sensitively detect the temperature of the refrigerator compartment. In some embodiments, the temperature detection device has other types of structures, such as an infrared temperature sensor, etc., which those skilled in the art think can be implemented.

In one embodiment, a refrigerator system is also provided, including a refrigerator and the above-mentioned indoor food storage control device in the refrigerator room.

The refrigerator system includes a refrigerating room, a supercooling function area, and a freezing room. The refrigeration equipment includes a refrigeration system compressor, an exhaust connection pipe, a condenser, a filter drier, a capillary tube, an evaporator, and an air return pipe connected in sequence. The control system includes: temperature sensor, controller, display board, temperature adjustment device, infrared sensor, and timer. The temperature sensor, display board, infrared sensor, timer, etc. are connected to the controller, and the display board has a corresponding over-cooling function. Button icon. In some embodiments, when the over-cooling function key is not illuminated, the over-cooling function area is used as a normal warming room.

The super-cooling function area of the refrigerator is separated from the freezer and refrigerator compartments of the refrigerator by insulation materials. In some embodiments, there is one drawer or multiple drawers in the supercooling function compartment. In some embodiments, when the compartment does not have a cooling function, the temperature is adjusted to above 0°C to store fruits and vegetables. In some embodiments, when there is a need to store frozen foods such as ice cream quick-frozen dumplings, the drawer is adjusted to a freezing temperature below 0°C. The function room has an independent cooling air duct, including a damper, an air outlet and a return air outlet. The location of the air outlet is the upper part of the rear of the storage box, which prevents the cold air from directly cooling the food stored in the compartment. In some embodiments, the air outlet is selected to ensure a uniform temperature in the compartment, so as to avoid inconsistencies in the temperature of the food in the compartment, and reduce the phenomenon of food drying. In some embodiments, the temperature sensor of the supercooling functional compartment is a thermocouple temperature sensor or an infrared temperature sensor. In this example, a thermocouple temperature sensor is used. In some embodiments, when the user does not perform the over-cooling function, the over-cooling function compartment is used as an ordinary warming room, and the temperature of the compartment is adjusted in the range of -18°C-10°C. When the user chooses to use the over-cooling mode, the function buttons on the display panel are lit.

In the refrigerator room indoor food storage control method, the temperature curve when the food is frozen is shown in Figure 6. In the first stage, corresponding to the first stage of the super-cooling mode, the temperature is lowered to above zero. This stage is the pre-cooling stage of food freezing. This stage prevents food quality from being damaged due to excessive cooling of the food. When the food temperature state is stable, enter the second stage, which corresponds to the second stage of the supercooling mode. In the second stage, through the separate control of four sub-stages, the food temperature is slowly reduced to below the freezing point without freezing and reaching a supercooled state. The third stage corresponds to controlling the compressor to run at the maximum allowable speed. Because the supercooling stage of the food is unstable and the storage time is short, this stage allows the food to quickly release the supercooled state and enter the frozen state, and the temperature is rapidly reduced to make the food Release the supercooled state and quickly pass through the largest ice crystal formation zone. The fourth stage corresponds to the freezing mode, and the compartment temperature is set to the set freezing temperature, which ensures long-term storage of food.

In one embodiment, referring to FIG. 7, the method for controlling indoor food storage in a refrigerator includes the following steps:

Step 1: Determine whether the refrigerator is in the defrosting mode; when the refrigerator is in the defrosting mode, perform step 2 after completing the defrosting mode; otherwise, stop starting the defrosting program until the first three stages of the supercooling mode are completed ；

Step 2: Enter the first stage of subcooling mode:

Let the preset time of the first stage be t1, the preset temperature is F1, and the preset compressor speed is S1; let the temperature fluctuation value of the first stage be Δ1. In some embodiments, the range of the preset temperature F1 is 5°C≤F1≤2°C; the range of the preset time t1 is 3h≤t1≤6h; the range of the preset compressor speed S1 is 3500rpm≤S1≤4500rpm; first The range of the temperature fluctuation value of the stage is 0≤Δ1≤3.

Time the first stage and use it as the running time ta of the first stage;

Step 3: Determine whether the running time ta reaches the preset time t1; when the running time ta reaches the preset time t1, it means that the first stage is over, and step 6 is executed, otherwise, step 4 is executed;

Step 4: Obtain the real-time temperature Fa of the compartment where the food is frozen and store it, and determine whether the real-time temperature Fa is greater than the preset temperature F1+Δ1. When the real-time temperature Fa is greater than the preset temperature F1+Δ1, the compressor speed will reach S1 for cooling the corresponding compartment; otherwise, go to step 5;

Step 5: Determine whether the real-time temperature Fa is greater than the preset temperature F1-Δ1; when the real-time temperature Fa is greater than the preset temperature F1-Δ1, maintain the current cooling situation and return to step 4, otherwise, temporarily stop the compressor operation, thereby stopping the Perform refrigeration in the corresponding compartment to increase the temperature of the compartment; and return to step four;

Step 6: Enter the second stage of subcooling mode:

Let the preset time of the i-th sub-stage in the second stage be t2i, where i∈{1,2,3,4};

Let the preset temperature of the i-th sub-stage in the second stage be F2i, let the preset compressor speed of the i-th sub-stage in the second stage be S2i, and initialize i=1; in some embodiments, let the The temperature floating value is Δ2, the range of the preset temperature F2i is -5℃≤F2i≤2℃; and F21≥F22≥F23≥F24; the preset compressor speed is 1200rpm≤S2i≤1800rpm; the range of the preset time t2i is 1h≤t2i≤2h; the range of temperature fluctuation value in the second stage is 0≤Δ2≤2.

Step 7: Timing the i-th sub-stage in the second stage, and use it as the running time tbi of the i-th sub-stage in the second stage;

Step 8: Determine whether the running time tbi reaches the preset time t2i; when the running time tbi reaches the preset time t2i, go to step 11; otherwise, go to step 9;

Step 9: Obtain the real-time temperature Fb of the compartment where the food is frozen; determine whether the real-time temperature Fb is greater than the preset temperature F2i+Δ2; when the real-time temperature Fb is greater than the preset temperature F2i+Δ2, make the compressor speed reach S2i, Used to cool the corresponding compartment, otherwise go to step ten, where Δ2≤Δ1;

Step 10: Determine whether the real-time temperature Fb is greater than the preset temperature F2i-Δ2; when the real-time temperature Fb is greater than the preset temperature F2i-Δ2, maintain the current refrigeration situation and return to step 9; otherwise, temporarily stop the compressor operation, thereby stopping the Perform refrigeration in the corresponding compartment; and return to step 9;

Step 11: Assign i+1 to i, and judge whether i>4 is true, when i>4, it means that the second stage is over, and step 12 is executed; otherwise, step 7 is executed;

Step 12: Enter the third stage of subcooling mode:

Step 13: Count the third stage as the running time tc of the third stage; let the preset time of the third stage be t3; in some embodiments, the preset compressor speed S3 is the compressor used in the refrigerator The maximum speed that can be reached; the range of the preset time t3 is 2h≤t3≤5h.

Step 14: Make the refrigerator compressor reach its maximum speed S3 and continue to run;

Step 15: Determine whether the running time tc reaches the preset time t3. When the running time tc reaches the preset time t3, it means that the third stage is over, and step 16 is executed; otherwise, return to step 14;

Step 16: Enter the fourth stage of the subcooling mode:

Set the temperature of the compartment where the corresponding food freezing storage is located to F4, and the range of F4 is -18℃≤F4≤-3℃. Food has a longer storage period at this temperature.

At this time, the temperature of the super-cooling function room cannot be adjusted. In some embodiments, after the user manually turns off the function button on the display panel, the compartment can be used as a greenhouse again. Through precise cooling temperature control, the food temperature is reduced to below the freezing point to reach the supercooled state of the food, and then by controlling the rapid drop in the temperature of the storage compartment, the food is released from the supercooled state at a very fast speed and passes through the maximum ice crystal generation area , Thus entering the frozen state. Through such a freezing method, the problem of nutritional quality damage caused by passing the maximum ice crystal generation zone for too long in the general food freezing process is solved, the food quality is guaranteed, and the food storage effect of the refrigerator is improved.

In one embodiment, referring to FIG. 8, a method for controlling indoor food storage in a refrigerator room is provided. The method includes the following steps:

Step S200': controlling the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset period of time.

Step S200' is basically the same as step S200, and the same content will not be repeated.

The temperature adjustment of the compartment of the refrigerator is achieved by controlling the evaporation and heat absorption of the refrigerant in the refrigerator evaporator. In some embodiments, a control device is used to control the evaporation and heat absorption of the refrigerant in the refrigerator evaporator. The control device can adjust the degree of refrigeration of the refrigerant in the evaporator by controlling the working state of the evaporator, thereby realizing the adjustment of the temperature of the refrigerator compartment.

Step S400': controlling the temperature of the compartment of the refrigerator to maintain the second subcooling temperature for a second preset period of time.

In some embodiments, the control device is used to control the evaporation and heat absorption of the refrigerant in the refrigerator evaporator to adjust the temperature of the refrigerator compartment, so as to maintain the temperature of the compartment at the second subcooling temperature.

Step S600': controlling the temperature of the compartment of the refrigerator to maintain the first freezing temperature for a third preset period of time.

After the second stage of the subcooling mode is completed, the control device enters the first stage of the freezing mode, and continues to cool the refrigerator compartment by continuing to control the refrigerant in the evaporator to absorb heat, so that the temperature of the refrigerator compartment continues to decrease to less than zero The first freezing temperature is in degrees Celsius, and the temperature of the compartment of the refrigerator is controlled to maintain the first freezing temperature for a third preset period of time.

The specific values of the first freezing temperature and the third preset duration are not unique, and the first freezing temperature is less than zero degrees Celsius. In some embodiments, maintaining the temperature of the compartment at the first freezing temperature for the third preset period of time is to control the actual temperature of the compartment to fluctuate up and down the first freezing temperature and maintain the corresponding period of time. Since the supercooled state of food is an unstable critical state, and the food in the supercooled state cannot be stored for a long time, the temperature of the compartment of the refrigerator is maintained at the first freezing temperature for a third preset period of time, so that the food Transforming from a supercooled state to a frozen state is conducive to the formation of tiny ice crystals of uniform size inside the food, thereby reducing the damage to the internal cells of the food, so that the nutrition and taste of the food are better protected, and the food in the frozen state It is more conducive to long-term storage.

Step S800': Maintain the temperature of the compartment of the refrigerator at the second freezing temperature.

Wherein, the first subcooling temperature is greater than or equal to the second subcooling temperature, the second subcooling temperature is greater than or equal to the first freezing temperature, the second freezing temperature is greater than the first freezing temperature and less than the second subcooling temperature, and the first overcooling temperature is greater than or equal to the first freezing temperature. The cooling temperature is greater than zero degrees Celsius, and the first freezing temperature and the second freezing temperature are both less than zero degrees Celsius. After the first stage of the freezing mode is completed, the control device enters the second stage of the freezing mode and maintains the temperature of the compartment of the refrigerator at the second freezing temperature. In some embodiments, the specific value of the second freezing temperature is not unique. To maintain the temperature of the compartment of the refrigerator as the second freezing temperature is to control the actual temperature of the compartment to fluctuate up and down the second freezing temperature. The second freezing temperature is less than zero degrees Celsius, and the second freezing temperature is greater than the first freezing temperature and less than the second subcooling temperature. Maintaining the temperature of the refrigerator compartment at the second freezing temperature can keep the food in a frozen state, which is beneficial to the long-term food The storage can also avoid excessive freezing of food, and the food stored at the second freezing temperature can be easily cut after being taken out, and the use convenience is good.

The food storage control method in the refrigerator compartment sequentially controls the temperature of the refrigerator compartment to maintain the first subcooling temperature and the second subcooling temperature, and slowly cools down through the temperature control to ensure that the food enters the supercooled state, and then the temperature of the refrigerator compartment enters The first freezing temperature is maintained for the third preset time, so that the food is cooled from supercooled to frozen, which is conducive to the formation of tiny ice crystals of uniform size inside the food, thereby reducing the damage to the internal cells of the food, and improving the nutrition and taste of the food. Good protection. Finally, the temperature of the refrigerator compartment is maintained at the second freezing temperature, which is greater than the first freezing temperature. Under the premise of ensuring the long-term storage of the food, it can also facilitate the cutting of the food after being taken out. In addition, by starting the refrigerant evaporation in the refrigerator evaporator to absorb heat and refrigerate, there is no need to blow air, which avoids the adverse effects of cold air on the food such as drying and freezing, ensuring food quality and improving the food storage effect of the refrigerator.

In one embodiment, referring to Fig. 9, step S200' includes step S210'.

Step S210': Control the difference between the actual temperature of the compartment of the refrigerator and the first subcooling temperature to be less than or equal to the first temperature floating value, and maintain the first preset duration. Step S210' is the same as step S210 and will not be described again.

In one embodiment, the second supercooling temperature includes more than two sub-stage temperature thresholds, and the second preset duration includes two or more sub-stage durations. Please refer to FIG. 9, step S400' includes step S410' .

Step S410': controlling the temperature of the compartment of the refrigerator to gradually decrease the temperature in each sub-stage according to the temperature threshold of each sub-stage, and maintaining the corresponding sub-stage duration in each sub-stage. Step S410' is the same as step S410, and will not be described again.

Further, in an embodiment, referring to FIG. 10, step S410' includes step S412'.

Step S412': Control the difference between the actual temperature of the refrigerator compartment in each sub-stage and the sub-stage temperature threshold to be less than or equal to the second temperature floating value, and maintain the corresponding sub-stage duration. Step S412' is the same as step S412, and further description of this step will not be repeated.

Through multiple sub-stage temperature thresholds, the temperature of the refrigerator compartment is continuously and accurately controlled, so that the food is slowly cooled to below its freezing point and enters the super-cooling state stably.

In one embodiment, referring to Fig. 9, step S600' includes step S610'.

Step S610': Control the difference between the actual temperature of the compartment of the refrigerator and the first freezing temperature to be less than or equal to the third temperature floating value, and maintain the third preset duration.

In some embodiments, the temperature maintenance range F3±Δ3 during the first stage of the freezing mode is determined according to the first freezing temperature F3 and the third temperature floating value Δ3. In the first stage of the freezing mode, the control device controls the actual temperature of the compartment to be kept within the temperature maintenance range F3±Δ3 for the third preset time period t3.

Among them, the first freezing temperature F3 is less than or equal to -18°C; the third preset time period t3 is greater than or equal to 2h and less than or equal to 5h, and the third temperature floating value Δ3 is greater than or equal to 0°C and less than or equal to 3°C. Taking the first freezing temperature F3 equal to -18°C as an example, the target temperature of the refrigerator compartment is -18°C. By setting a very low temperature F3, the control device will control and increase the heat absorption degree of the evaporator refrigerant to make the refrigerator cooler. The refrigeration system reaches the maximum refrigeration parameter, which makes the indoor temperature drop rapidly in the function room, which can quickly transform the food from the supercooled state to the frozen state, greatly shorten the time for the food to pass through the maximum ice crystal formation zone, and help improve the food quality.

In one embodiment, when the temperature of the compartment of the refrigerator is maintained at the second freezing temperature F4 in step S800', the second freezing temperature F4 is greater than or equal to -18°C and less than or equal to -5°C. Since the first freezing temperature F3 corresponding to the first freezing stage is very small, if the food is stored at the first freezing temperature F3 for a long time, the food will be over-frozen, and the user needs to defrost for a long time when the food is needed, which is inconvenient to use. Therefore, by maintaining the temperature of the compartment of the refrigerator at the second freezing temperature F4, the food can be kept in a frozen state, which is conducive to long-term storage of the food, and can also avoid excessive freezing of the food. The food stored at the second freezing temperature is convenient to cut after being taken out, and the use convenience is good.

In one embodiment, referring to FIG. 11, before step S200', the method for controlling food storage in a refrigerator compartment may further include step S100'.

Step S100': It is judged whether the refrigerator is in the defrosting mode. When the refrigerator is in the defrosting mode, after the defrosting mode is completed, step S200' is performed. When the refrigerator is not in the defrosting mode, stop and start the defrosting program until the first and second stages of the overcooling mode are completed, and the first stage of the freezing mode is completed. Step S100' is the same as step S100, and will not be described again.

In one embodiment, controlling the evaporation and heat absorption of the refrigerant in the refrigerator evaporator is: sending a first control signal to the solenoid valve and/or sending a second control signal to the compressor, and the compressor is connected to the evaporator through the solenoid valve; The control signal is used to adjust the opening of the solenoid valve so that the refrigerant in the evaporator evaporates and absorbs heat, and the second control signal is used to adjust the compressor speed so that the refrigerant in the evaporator evaporates and absorbs heat.

In some embodiments, the compressor is connected to the evaporator through a solenoid valve, and the refrigerant in the evaporator refers to the refrigerant. The control device controls the compressor and the solenoid valve to control the degree of heat absorption of the refrigerant in the evaporator, and can adjust the temperature of the refrigerator compartment. In some embodiments, the control device sends a first control signal to the solenoid valve, and the solenoid valve changes the valve opening according to the received first control signal to adjust the amount of refrigerant entering the evaporator, thereby changing the refrigeration in the evaporator. The amount of heat absorbed in the refrigerator compartment when the agent vaporizes plays a role in regulating the temperature in the refrigerator compartment. In some embodiments, the control device sends a second control signal to the compressor, and the compressor changes its own speed through the received second control signal, and changes the working parameters of the evaporator, thereby changing the absorption of the refrigerant in the evaporator when it vaporizes. The amount of heat in the refrigerator compartment plays a role in regulating the indoor temperature of the refrigerator compartment. In some embodiments, the control device adjusts the temperature of the compartment by simultaneously controlling the working state of the solenoid valve and the compressor, and the selection can be made according to actual needs.

In one embodiment, referring to FIG. 5, there is also provided a food storage control device in a refrigerator room, including a first-stage control module 200, a second-stage control module 400, a third-stage control module 600, and a fourth-stage control Module 800.

The first-stage control module 200 is used to control the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset time period. The second stage control module 400 is used to control the temperature of the compartment of the refrigerator to maintain the second subcooling temperature for a second preset period of time. The third stage control module 600 is used to control the temperature of the refrigerator compartment at the first freezing temperature for a third preset period of time, and the fourth stage control module 800 is used to maintain the temperature of the refrigerator compartment at the second freezing temperature. Among them, the temperature adjustment of the refrigerator compartment is achieved by controlling the evaporation and heat absorption of the refrigerant in the refrigerator evaporator; the first subcooling temperature is greater than or equal to the second subcooling temperature, the second subcooling temperature is greater than or equal to the first freezing temperature, and the second subcooling temperature is greater than or equal to the first freezing temperature. The second freezing temperature is greater than the first freezing temperature and less than the second subcooling temperature, and the first subcooling temperature is greater than zero degrees Celsius, and both the first freezing temperature and the second freezing temperature are less than zero degrees Celsius.

The first-stage control module 200 and the second-stage control module 400 have been described above, and will not be repeated here.

In one embodiment, the third stage control module 600 controls the difference between the actual temperature of the compartment of the refrigerator and the first freezing temperature to be less than or equal to the third temperature floating value, and maintains the third preset duration.

In one embodiment, the food storage control device in the refrigerator room further includes a defrosting detection module, which has been described above and will not be repeated.

For the specific limitation of the indoor food storage control device in the refrigerator room, please refer to the above-mentioned limitation on the indoor food storage control method in the refrigerator room, which will not be repeated here.

In one embodiment, the present application also provides an indoor food storage control device in a refrigerator room, which includes a refrigeration device, a temperature detection device, and a control device. Both the refrigeration device and the temperature detection device are connected to the control device. The temperature detection device is installed in the refrigerator compartment. The temperature detection device is used to detect the temperature in the refrigerator compartment and send it to the control device. The refrigeration device is used to cool the refrigerator compartment, and the control device is used to cool the refrigerator compartment. The above-mentioned method for controlling the food storage in the refrigerator room is executed to control the food storage in the refrigerator.

In some embodiments, the refrigeration device includes a compressor, a solenoid valve, and an evaporator. The compressor is connected to the evaporator through the solenoid valve, and both the compressor and the solenoid valve are connected to the control device.

In some embodiments, the control device controls the degree of heat absorption of the refrigerant in the evaporator by controlling the compressor and the solenoid valve, and can adjust the temperature of the refrigerator compartment. In some embodiments, the control device sends a first control signal to the solenoid valve, and the solenoid valve changes the valve opening according to the received first control signal to adjust the amount of refrigerant entering the evaporator, thereby changing the refrigeration in the evaporator. The amount of heat absorbed in the refrigerator compartment when the agent vaporizes plays a role in regulating the temperature in the refrigerator compartment. In some embodiments, the control device sends a second control signal to the compressor, and the compressor changes its own speed through the received second control signal, and changes the working parameters of the evaporator, thereby changing the absorption of the refrigerant in the evaporator when it vaporizes. The amount of heat in the refrigerator compartment plays a role in regulating the indoor temperature of the refrigerator compartment. In some embodiments, the control device adjusts the temperature of the compartment by simultaneously controlling the working state of the solenoid valve and the compressor, and the selection can be made according to actual needs.

In one embodiment, the temperature detection device is a thermocouple temperature sensor. In other embodiments, the temperature detection device may also be other types of structures, such as infrared temperature sensors.

In one embodiment, there is also provided a refrigerator system, including a refrigerator and the indoor food storage control device in the refrigerator room in the above embodiments.

The refrigerator system includes a refrigerating room, a supercooling function area and a freezing room. The refrigeration system includes a compressor, an exhaust connection pipe, a condenser, a filter drier, a solenoid valve, a capillary tube, an evaporator, and an air return pipe, which are controlled by the solenoid valve. There are three compartmental evaporator passages, three groups of evaporators are connected in parallel, and each group of evaporators is connected with a corresponding capillary tube. The control device includes a temperature sensor, a controller, a display board, a temperature adjustment device and a timer, and the temperature sensor, a display board, an infrared sensor, a timer, etc. are connected with the control device. The temperature sensor of the super-cooling functional compartment in the embodiment may be a thermocouple temperature sensor or an infrared temperature sensor. In this embodiment, a thermocouple temperature sensor is used. In some embodiments, the temperature change of the super-cooling functional compartment is realized by controlling the opening and closing of the corresponding passage by a solenoid valve. In some embodiments, the temperature change of the supercooling function compartment is realized by changing the compressor speed. In this embodiment, the opening of the solenoid valve and the change of the compressor speed work together. When the user does not perform food storage control in the refrigerator, the super-cooling function compartment can be used as an ordinary temperature changing room, and the temperature of the compartment can be adjusted at -18℃-10℃. When the user chooses to use the food storage control in the refrigerator, the function buttons on the display panel are lighted.

In the refrigerator room indoor food storage control method, the temperature curve when the food is frozen is shown in Figure 12. In the first stage, corresponding to the first stage of the super-cooling mode, the temperature drops to above zero, which is the pre-cooling stage before the food is frozen. The effect of this stage is that the food will not cause uneven temperature inside and outside due to the rapid freezing, which will cause the quality of the food to decline. As shown in the second stage of Fig. 6, corresponding to the second stage of the super-cooling mode, the temperature of the food slowly decreases in stages, so that the temperature is steadily lowered to below the freezing point of the food, and the food reaches the super-cooled state. The third stage corresponds to the first stage of the freezing mode. Due to the rapid cooling of the compartment, the supercooled state of the food is released. As shown in the third stage of Figure 12, the food quickly returns to the freezing temperature from the supercooling temperature and freezes quickly due to the freezing speed. Extremely fast, so there is little damage to food cells during the freezing process. Finally, as shown in stage four in Figure 6, corresponding to the second stage of the freezing mode, the food temperature gradually decreases and stabilizes at the temperature set in stage four. At this temperature, food can be stored in the refrigerator for a longer period of time.

In some embodiments, referring to FIG. 13, the method for controlling indoor food storage in a refrigerator includes the following steps:

Step 2: Enter the first stage of subcooling mode:

Let the preset time of the first stage be t1, the range of the preset time t1 is 3h≤t1≤6h, and the preset t1 in this embodiment is 5h. The preset temperature is F1, the range of the preset temperature F1 is 5°C≤F1≤2°C, and the preset temperature in this embodiment is 5°C; let the temperature float value in the first stage be Δ1, and the temperature float value range is 0≤ Δ1≤3, this embodiment sets Δ1=2;

Time the first stage and use it as the running time ta of the first stage;

Step 3: Determine whether the running time ta reaches the preset time 5h; when the running time ta reaches the preset time 5h, it means that the first stage is over, and step 6 is executed, otherwise, step 4 is executed;

Step 4: Obtain the real-time temperature Fa of the compartment where the food is frozen and determine whether the real-time temperature Fa is greater than the preset temperature (5+2)°C; when the real-time temperature Fa is greater than the preset temperature (5+2)°C, turn it on The solenoid valve channel of the corresponding compartment or increase the compressor speed to cool the corresponding compartment; otherwise, go to step 5;

Step 5: Determine whether the real-time temperature Fa is greater than the preset temperature (5-2)°C; when the real-time temperature Fa is greater than the preset temperature (5-2)°C, maintain the current cooling situation and return to step 4, otherwise, close the corresponding room The solenoid valve passage of the chamber or the speed of the compressor is reduced to stop the refrigeration of the corresponding chamber; and return to step four;

Step 6: Enter the second stage of subcooling mode:

Let the preset temperature of the i-th substage in the second stage be F2i, and initialize i=1; let the temperature floating value of the second stage be Δ2; the range of the preset temperature F2i is -5℃≤F2i≤2℃; And F21≥F22≥F23≥F24, in this embodiment F21=2℃, F22=0℃, F23=-2℃, F24=-5℃; the range of preset time t2i is 1h≤t2i≤2h, In the embodiment, t2i=2h; the range of the temperature fluctuation value in the second stage is 0≤Δ2≤2, and Δ2=1 in this embodiment.

Step 8: Determine whether the running time tbi reaches the preset time 2h; when the running time tbi reaches the preset time 2h, go to step 11; otherwise, go to step 9;

Step 9: Obtain the real-time temperature Fb of the compartment where the food is frozen; determine whether the real-time temperature Fb is greater than the preset temperature F2i+1; when the real-time temperature Fb is greater than the preset temperature F2i+1, open the solenoid valve channel of the compartment Or increase the compressor speed to cool the corresponding compartment, otherwise go to step 10, where Δ2≤Δ1;

Step 10: Determine whether the real-time temperature Fb is greater than the preset temperature F2i-1; when the real-time temperature Fb is greater than the preset temperature F2i-1, maintain the current cooling situation and return to step 9; otherwise, close the solenoid valve channel of the corresponding compartment or Reduce the speed of the compressor to stop the cooling of the corresponding compartment; and return to step 9;

Step 11: Assign i+1 to i, and judge whether i>4 is established, when it is established, it means that the second stage is over, and step 12 is executed; otherwise, step 7 is executed;

Step 12: Enter the third stage of subcooling mode:

Time the third stage and use it as the running time tc of the third stage;

Let the preset time of the third stage be t3 and the preset temperature be F3; let the temperature floating value of the third stage be Δ3; where the range of the preset temperature F3 is F3≤-18°C, and F3=-18 in this embodiment ℃; the range of the preset time t3 is 2h≤t3≤5h, and in this embodiment, t3=5h. The range of the temperature fluctuation value in the third stage is 0≤Δ3≤3, and Δ3=2 is used in this embodiment.

Step 13: Determine whether the recording time tc reaches the preset time 5h; when it reaches, it means that the third stage is over, and step 16 is executed; otherwise, step 14 is executed;

Step 14: Obtain the real-time temperature Fc of the compartment where the food is frozen, and determine whether the real-time temperature Fc is greater than the preset temperature (-18+2)°C; when the real-time temperature Fc is greater than the preset temperature (-18+2)°C , Then open the solenoid valve channel of the corresponding compartment or increase the compressor speed to cool the corresponding compartment; otherwise, go to step 14;

Step 15: Determine whether the real-time temperature Fc is greater than the preset temperature (-18-2)°C; when the real-time temperature Fc is greater than the preset temperature (-18-2)°C, maintain the current cooling situation and return to step 14, otherwise , Close the solenoid valve channel of the corresponding compartment or reduce the speed of the compressor to stop the cooling of the corresponding compartment; and return to step fourteen;

Step 16: Enter the fourth stage of the subcooling mode:

Set the temperature of the compartment where the corresponding food is frozen and stored as F4=-5°C.

At this time, the temperature of the super-cooling function room cannot be adjusted. In some embodiments, after the user manually turns off the function button on the display panel, the changed room is used as a changing room again.

In one embodiment, referring to FIG. 14, a method for controlling indoor food storage in a refrigerator room is provided. The method includes the following steps:

Step S200": controlling the temperature in the sealed drawer of the refrigerator to maintain the first subcooling temperature for a first preset period of time.

Among them, the sealed drawer is arranged in the refrigerator compartment, the food is placed in the sealed drawer, and the sealed drawer in the refrigerator compartment is used to store the food. The sealed drawer is used as the sub-cooling and freezing function zone. The temperature adjustment in the airtight drawer of the refrigerator is realized by cooling the outside of the airtight drawer. In some embodiments, a control device is used to control the refrigeration device to cool the sealed drawer, so as to adjust the temperature in the sealed drawer.

A temperature detection device is installed in the sealed drawer for temperature detection, and a refrigeration device is used to cool the outside of the sealed drawer. In some embodiments, the temperature of each position in the sealed drawer is basically the same, so that the food cools down smoothly. In some embodiments, the way to cool the outside of the sealed drawer is not the only way. A way of blowing cold air to the sealed drawer is adopted, and the temperature in the sealed drawer is adjusted by controlling the size of the air outlet. Because the sealed drawer adopts a sealed structure, the cold air will not contact the food, and the food is prevented from being air-dried. In some embodiments, other ways of cooling the sealed drawer are adopted to cool the sealed drawer outside, and the cooling medium in the evaporator of the refrigerator is controlled to evaporate and absorb heat to cool the outside of the sealed drawer. This method does not generate flowing wind, which is better. Avoid reducing the humidity of food and improve the quality of food.

In some embodiments, the first subcooling temperature is greater than zero degrees Celsius, and the specific values of the first subcooling temperature and the first preset duration are not unique, and can be selected according to actual needs.

Step S400": controlling the temperature in the sealed drawer of the refrigerator to maintain the second subcooling temperature for a second preset period of time.

After completing the food pre-cooling mode, the control device controls the food to enter the super-cooling mode, and controls the temperature in the sealed drawer of the refrigerator to maintain the second super-cooling temperature for a second preset period of time. In some embodiments, the control device is used to control the refrigeration device to cool the outside of the sealed drawer to adjust the temperature in the sealed drawer, so as to maintain the temperature of the compartment at the second subcooling temperature.

In the super-cooling mode, the control device gradually reduces the temperature of the sealed drawer from greater than zero degrees Celsius to less than zero degrees Celsius, and slowly reduces the temperature through temperature control to make the food enter the super-cooled state. In addition, in some embodiments, maintaining the temperature in the sealed drawer at the second subcooling temperature for a second preset period of time is to control the actual temperature of the sealed drawer to fluctuate up and down at the second subcooling temperature and maintain the corresponding period of time. By pre-cooling the food first and then entering the super-cooling mode, the food can be slowly cooled to below its freezing point and enter the super-cooling state stably.

Step S600": controlling the temperature in the sealed drawer of the refrigerator to maintain a preset third preset period of time at the first freezing temperature.

After the second stage of the super-cooling mode is completed, the control device enters the first stage of the freezing mode. By continuing to cool the outside of the sealed drawer, the temperature of the sealed drawer is continuously reduced to the first freezing temperature less than zero degrees Celsius, and the sealing is controlled. The temperature of the drawer is maintained at the first freezing temperature for a preset third preset period of time. In some embodiments, the specific values of the first freezing temperature and the preset third preset duration are not unique, and the first freezing temperature is less than zero degrees Celsius. In some embodiments, maintaining the temperature of the sealed drawer at the first freezing temperature for a preset third preset period of time is to control the actual temperature of the sealed drawer to fluctuate up and down the first freezing temperature and maintain the corresponding period of time. Since the supercooled state of food is an unstable critical state, and the food in the supercooled state cannot be stored for a long time, the temperature in the sealed drawer of the refrigerator is controlled to maintain the preset third preset period of time at the first freezing temperature. Transform the food from the supercooled state to the frozen state, which is conducive to the formation of tiny ice crystals of uniform size inside the food, thereby reducing the damage to the internal cells of the food, so that the nutrition and taste of the food are better protected, and the food is in the frozen state The food is more conducive to long-term storage.

Step S800": Maintain the temperature in the sealed drawer of the refrigerator at the second freezing temperature.

Among them, the temperature adjustment in the sealed drawer of the refrigerator is realized by cooling the outside of the sealed drawer. The first subcooling temperature is greater than the second subcooling temperature, the second subcooling temperature is greater than or equal to the first freezing temperature, and the second freezing temperature is greater than the first freezing temperature. A freezing temperature is less than the second subcooling temperature, and the first subcooling temperature is greater than zero degrees Celsius, and the first freezing temperature and the second freezing temperature are both less than zero degrees Celsius. After the first stage of the freezing mode is completed, the control device enters the second stage of the freezing mode to maintain the temperature in the sealed drawer of the refrigerator at the second freezing temperature. In some embodiments, the specific value of the second freezing temperature is not unique. To maintain the temperature in the sealed drawer of the refrigerator as the second freezing temperature is to control the actual temperature in the sealed drawer to fluctuate up and down the second freezing temperature. The second freezing temperature is less than zero degrees Celsius, and the second freezing temperature is greater than the first freezing temperature and less than the second subcooling temperature. Maintaining the temperature in the sealed drawer of the refrigerator at the second freezing temperature can keep the food in a frozen state, which is beneficial to the long-term food The storage can also avoid excessive freezing of food, and the food stored at the second freezing temperature can be easily cut after being taken out, and the use convenience is good.

The indoor food storage control method in the refrigerator room sequentially controls the temperature in the sealed drawer of the refrigerator to maintain the first supercooling temperature and the second supercooling temperature, so as to ensure that the food in the sealed drawer enters the supercooled state. Then, the temperature in the sealed drawer is controlled to maintain the first freezing temperature, so that the food is from supercooled to frozen, which is beneficial to the formation of tiny ice crystals of uniform size inside the food, thereby reducing the damage to the internal cells of the food. Finally, the temperature of the compartment of the refrigerator is maintained at a second freezing temperature that is greater than the first freezing temperature, so that the food can be easily cut after being taken out while ensuring long-term storage of the food. In addition, by refrigerating the sealed drawer outside, the food in the sealed drawer is prevented from air-drying and freezing and burning during the cooling process, the food quality is guaranteed, and the food storage effect of the refrigerator is improved.

In one embodiment, referring to FIG. 15, step S200" includes step S210".

Step S210": Control the difference between the actual temperature in the airtight drawer of the refrigerator and the first subcooling temperature to be less than or equal to the first temperature floating value, and maintain the first preset duration. Step S210" is the same as step S210, and will not be repeated here. .

In one embodiment, the second supercooling temperature includes the first temperature and the second temperature, and the second preset duration includes the first duration and the second duration. Please refer to FIG. 15. Step S400 "includes step S410" and step S420" .

Step S410": controlling the temperature in the sealed drawer of the refrigerator to maintain the first temperature for a first period of time.

After completing the food pre-cooling mode, the control device controls the food to enter the super-cooling mode. In some embodiments, the specific composition of the supercooling mode is not unique. In this embodiment, the supercooling mode includes the first stage of the supercooling mode and the second stage of the supercooling mode. The temperature in the sealed drawer of the refrigerator is controlled to maintain the first temperature for the first time period, and enter the first stage of the super-cooling mode. In some embodiments, the specific values of the first temperature and the first duration are not unique, and can be selected according to actual requirements. In some embodiments, the first temperature may include more than one. In the first stage of the subcooling mode, the control device gradually reduces the temperature in the sealed drawer from the first subcooling temperature greater than zero degrees Celsius to less than zero degrees Celsius, and slowly cools the food through the temperature control to make the food enter the supercooled state. In some embodiments, controlling the temperature in the sealed drawer to maintain at the first temperature for a first preset period of time is to control the actual temperature of the sealed drawer to fluctuate up and down at the first temperature and maintain the corresponding period of time to complete the entry of food stored in the refrigerator. The first stage of the super-cooling mode makes the pre-cooled food slowly enter the super-cooled state, avoiding the uneven temperature inside and outside the food caused by sudden temperature changes, which is beneficial to improve the quality of the food.

Step S420": controlling the temperature in the sealed drawer of the refrigerator to maintain the second temperature for a second period of time.

After the first stage of the supercooling mode is completed, the control device enters the second stage of the supercooling mode, and controls the temperature in the sealed drawer of the refrigerator to maintain the second temperature for a second period of time. Wherein, the second temperature is less than the first temperature, and the control device is used to control further cooling of the outside of the sealed drawer, so that the temperature in the sealed drawer drops to the second temperature and maintains the second temperature to ensure that the food enters the supercooled state. In addition, in some embodiments, maintaining the temperature in the sealed drawer at the second temperature for the second period of time is to control the actual temperature of the sealed drawer to fluctuate up and down at the second temperature and maintain the corresponding period of time. By making the food go through the pre-cooling stage, the first stage and the second stage of the super-cooling mode, the food can be slowly cooled to below its freezing point and enter the super-cooling state stably.

In one embodiment, the first temperature includes more than two sub-stage temperature thresholds, and the first duration includes two or more sub-stage durations. Please refer to FIG. 16, where step S410" includes step S412".

Step S412": controlling the temperature in the sealed drawer of the refrigerator to gradually decrease the temperature in each sub-stage according to the temperature threshold of each sub-stage, and maintain the corresponding sub-stage duration in each sub-stage.

The first stage of the super-cooling mode is divided into multiple sub-stages. The control device controls the actual temperature of the sealed drawer in each sub-stage to maintain the temperature threshold of the corresponding sub-stage, and makes the temperature of the sealed drawer gradually drop in each sub-stage to complete the food The slow cooling of the food causes the food to enter a supercooled state.

In some embodiments, the number of sub-stage temperature thresholds is not unique. The more the number of temperature thresholds in the sub-stage, the slower the cooling process of the food, and the more precise the temperature control of the food. In some embodiments, the number of sub-phase durations is not unique, and is determined according to factors such as the user's food storage needs and food types.

In one embodiment, step S412" includes: controlling the difference between the actual temperature of the compartment of the refrigerator in each sub-stage and the sub-stage temperature threshold to be less than or equal to the second temperature floating value, and maintaining the corresponding sub-stage duration. Step S412 "Same as step S412.

In one embodiment, referring to FIG. 16, step S420" includes step S422".

Step S422": Control the difference between the actual temperature in the sealed drawer of the refrigerator and the second temperature to be less than or equal to the fourth temperature floating value, and maintain the second time duration.

In some embodiments, according to the second temperature F3 and the fourth temperature floating value Δ3, the temperature maintenance range F3±Δ3 in the second stage of the supercooling mode is determined. In the second stage of the super-cooling mode, the control device controls the actual temperature in the sealed drawer to be maintained within the temperature maintenance range F3±Δ3 for the second time period t3. Among them, the second temperature F3 is greater than or equal to -10°C and less than or equal to -5°C, the second time period t3 is greater than or equal to 1h and less than or equal to 3h, and the fourth temperature floating value Δ3 is greater than or equal to 0°C and less than or equal to 1°C. The second stage of the super-cooling mode ensures that the food can enter the super-cooled state by further cooling, and the control temperature in this stage is maintained within a stable F3±Δ3 range to ensure that the food reaches a relatively stable state.

In one embodiment, the fourth temperature fluctuation value is smaller than the second temperature fluctuation value, and the second temperature fluctuation value is smaller than the first temperature fluctuation value. The smaller the temperature fluctuation value is, the smaller the temperature fluctuation range of the corresponding stage is. In the first stage of the supercooling mode, set the second temperature fluctuation value corresponding to the smaller first temperature fluctuation value of the pre-cooling stage to make the supercooling mode The temperature control in the first stage is more precise than the temperature control in the pre-cooling stage. In the second stage of the supercooling mode, set the fourth temperature fluctuation value corresponding to the second temperature fluctuation value of the first stage of the supercooling mode to be smaller, so that the temperature control of the second stage of the supercooling mode is better than that of the first stage of the supercooling mode. The temperature control of the stage is more precise, ensuring that the food is kept in a stable state of supercooling.

In one embodiment, the first freezing temperature is less than or equal to -18°C, the third preset duration is greater than or equal to 2h and less than or equal to 5h, and the second freezing temperature is greater than or equal to -18°C and less than or equal to -3°C.

In some embodiments, the first freezing temperature F4 corresponding to the first freezing stage is less than or equal to -18°C, the third preset time period t4 is greater than or equal to 2h and less than or equal to 5h, and the second freezing temperature corresponding to the second freezing stage F5 is greater than or equal to -18°C and less than or equal to -3°C. In the first freezing stage, taking the first freezing temperature F4 equal to -18°C as an example, the target temperature in the sealed drawer is -18°C. By setting a very low temperature F4, the control device will control the increase in the temperature in the sealed drawer. The refrigeration intensity makes the temperature in the sealed drawer drop rapidly, achieving the purpose of quickly transforming the food from the supercooled state to the frozen state, greatly shortening the time for the food to pass through the maximum ice crystal generating area, and improving the quality of the food.

In addition, because the first freezing temperature F4 corresponding to the first freezing stage is very small, if the food is stored at the first freezing temperature F4 for a long time, the food will be over-frozen, and the user needs to defrost for a long time when the food is needed, which is convenient to use Poor sex. Therefore, by maintaining the temperature of the refrigerator compartment at the second freezing temperature F5, the food can be kept in a frozen state, which is conducive to long-term storage of the food, and it can also avoid excessive freezing of the food. After the food stored at the second freezing temperature is taken out It is easy to cut and easy to use.

In one embodiment, referring to FIG. 17, before step S200", the method for controlling food storage in the refrigerator compartment may further include step S100".

Step S100": Determine whether the refrigerator is in the defrosting mode. When the refrigerator is in the defrosting mode, after completing the defrosting mode, proceed to step S200". If the refrigerator is not in the defrosting mode, stop and start the defrosting program until the pre-cooling stage, the first stage and the second stage of the super-cooling mode are completed.

In some embodiments, the control device determines whether the refrigerator is currently in the defrosting mode according to the operating state parameters of the refrigerator. When the refrigerator is currently in the defrosting mode, it waits for the defrosting operation to be completed and then performs the food supercooling operation. If the refrigerator is not in the defrosting mode, it is forbidden to start the defrosting operation until the pre-cooling stage, the first stage and the second stage of the super-cooling mode are completed. After the refrigerator enters the defrosting stage, the temperature of each compartment of the refrigerator will rise, and the temperature of the sealed drawer located in the compartment of the refrigerator will also rise, which will affect the normal operation of the subcooling and freezing procedures. Therefore, the refrigerator controls the food to enter the super-cooling mode when the refrigerator is not in the defrosting mode, avoiding the influence of temperature changes in the defrosting mode on the temperature in the sealed drawer, and improving the reliability of food storage.

In one embodiment, please refer to FIG. 5, the indoor food storage control device in a refrigerator room includes a first-stage control module 200, a second-stage control module 400, a third-stage control module 600, and a fourth-stage control module 800.

The first stage control module 200 is used to control the temperature in the sealed drawer of the refrigerator to maintain the first subcooling temperature for a first preset time period. The sealed drawer is arranged in the refrigerator compartment, and the food is placed in the sealed drawer. The second stage control module 400 is used to control the temperature in the sealed drawer of the refrigerator to maintain the second subcooling temperature for a second preset period of time. The third-stage control module 600 is used to control the temperature in the sealed drawer of the refrigerator to maintain a preset third preset period of time at the first freezing temperature. The fourth stage control module 800 is used to maintain the temperature in the sealed drawer of the refrigerator at the second freezing temperature. Among them, the temperature adjustment in the sealed drawer of the refrigerator is realized by blowing cold air to the outside of the sealed drawer; the first subcooling temperature is greater than the second subcooling temperature, the second subcooling temperature is greater than or equal to the first freezing temperature, and the second freezing temperature is greater than the first freezing temperature. A freezing temperature is less than the second subcooling temperature, and the first subcooling temperature is greater than zero degrees Celsius, and the first freezing temperature and the second freezing temperature are both less than zero degrees Celsius.

In one embodiment, the first-stage control module 200 controls the difference between the actual temperature in the sealed drawer of the refrigerator and the first supercooling temperature to be less than or equal to the first temperature floating value, and maintain the first preset duration.

In one embodiment, the second supercooling temperature includes the first temperature and the second temperature, the second preset duration includes the first duration and the second duration, and the second stage control module 400 controls the temperature in the sealed drawer of the refrigerator at the first temperature. The temperature is maintained for a first period of time, and the temperature in the sealed drawer of the refrigerator is controlled to be maintained at a second temperature for a second period of time, and the second temperature is less than the first temperature.

In one embodiment, the first temperature includes more than two sub-stage temperature thresholds, the first time length includes two or more sub-stage durations, and the second-stage control module 400 controls the sealing of the refrigerator according to the temperature thresholds of each sub-stage. The temperature in the drawer is gradually lowered in each sub-stage, and the corresponding sub-stage duration is maintained in each sub-stage.

In one embodiment, the second stage control module 400 controls the difference between the actual temperature in the sealed drawer of the refrigerator and the second temperature to be less than or equal to the fourth temperature floating value, and maintains the second period of time.

In an embodiment, the device for controlling indoor food storage in a refrigerator room further includes a defrosting detection module. The defrosting detection module is used for determining whether the refrigerator is in the defrosting mode before the temperature in the sealed drawer of the refrigerator is controlled by the control module 200 in the first stage before the first supercooling temperature is maintained for the first preset period of time. When the refrigerator is in the defrosting mode, the first-stage control module 200 is controlled to control the temperature in the sealed drawer of the refrigerator to maintain the first subcooling temperature for the first preset period of time. In addition, if the refrigerator is not in the defrosting mode, stop and start the defrosting program until the pre-cooling stage, the first stage and the second stage of the super-cooling mode are completed.

In one embodiment, the present application also provides an indoor food storage control device in a refrigerator room, including a sealed drawer, a refrigerating device, a temperature detecting device, and a control device. The sealed drawer is arranged in the refrigerator compartment, and the refrigerating device and the temperature detecting device are both connected. The control device, the refrigeration device is used to cool the outside of the sealed drawer, the temperature detection device is used to detect the temperature in the sealed drawer and send it to the control device, and the control device is used to execute the above-mentioned method for controlling food storage in the refrigerator room to control the food storage in the refrigerator room .

In one embodiment, the sealed drawer includes a drawer body, a sealing ring and a cover plate, and the drawer body and the cover plate are sealed by the sealing ring. In some embodiments, the upper end of the drawer body is equipped with a cover plate. When the drawer is closed, the cover plate completely covers the upper end of the drawer to ensure that the cold air in the compartment will not enter the inside of the drawer. In some embodiments, other parts of the drawer are also completely sealed, which ensures the overall tightness of the drawer when the drawer is closed.

In one embodiment, the carrying plate for carrying food in the drawer body is a carrying plate with a honeycomb grid structure. In some embodiments, the carrying plate in the drawer body and the side wall are integrally formed. The carrier plate used to carry food in the drawer body is a honeycomb grid structure. When cold air is used to cool the outside of the sealed drawer, the cold air can pass through the carrier plate at the bottom of the drawer more uniformly and have a larger contact area, so that the sealed drawer has a better cooling effect. Good and more even.

In one embodiment, the present application provides a refrigerator system. The refrigerator system includes a refrigerating chamber, a supercooling function area, and a freezing chamber. The refrigeration equipment includes a refrigeration system compressor, an exhaust connection pipe, a condenser, and a filter drier connected in sequence. , Capillary tube, evaporator and return pipe. The control device includes a temperature sensor, a controller, a display board, a temperature adjustment device, an infrared sensor and a timer, and the temperature sensor, a display board, an infrared sensor and a timer are all connected with the control device. The display board has the corresponding super-cooling function button icon. When the over-cooling function key is not lit, the over-cooling function area can be used as a normal temperature changing room. The super-cooling function area of the refrigerator is separated from the freezer and refrigerator compartments of the refrigerator by insulation materials. In some embodiments, there is one drawer or multiple sealed drawers in the super-cooling functional compartment. The schematic diagrams of the sealed drawers are shown in Figs. 18 and 19. The upper end of the sealed drawer is equipped with a cover. When the drawer is closed, the cover completely covers the upper end of the drawer to ensure that the cold air in the compartment will not enter the inside of the drawer. In some embodiments, other parts of the drawer are also completely sealed, which ensures the overall tightness of the drawer when the drawer is closed. In some embodiments, the bottom of the drawer is made into a honeycomb grid structure, which allows cold air to pass through the bottom of the drawer more uniformly and has a larger contact area, so that the cooling effect of the sealed drawer is better and more uniform.

The function room has an independent cooling air duct, including a damper, an air outlet and a return air outlet. The position of the air outlet is the upper part of the rear of the storage box, and the air outlet is preferentially selected at a position that ensures uniform temperature in the compartment. As shown in Figure 20, the cold air in the compartment will not directly enter the inside of the drawer, and it forms a stable circulation around the sealed drawer , So as to cool down the drawer evenly. In some embodiments, when the user does not perform the over-cooling function, the over-cooling function compartment is used as an ordinary warming room, and the temperature of the compartment is adjusted in the range of -18°C-10°C. When the user chooses to use the over-cooling mode, the function buttons on the display panel are lighted. Under the control method of indoor food storage in the refrigerator, the temperature curve when the food is frozen is shown in Figure 21. In the first stage (stage 1), the pre-cooling stage, corresponding to the first stage of the super-cooling mode, the temperature is lowered to above zero. This stage is the pre-cooling stage of food freezing. This stage prevents the food from causing food quality due to excessive cooling. damage. The second stage (stage two) includes a first supercooling substage and a second supercooling substage. When the temperature of the food is stable, it enters the first sub-phase of the second phase (phase two). The second stage (stage two) is the second stage of the supercooling mode. In the first sub-cooling sub-stage, the temperature of the food is slowly reduced to about the freezing point through the separate control of the four sub-stages. The second super-cooling sub-stage is a sub-stage in the second stage of the super-cooling mode. This stage further reduces the temperature to ensure that the food temperature is further reduced to reach the super-cooling state. The third stage (stage three) is the first stage of the freezing mode. Since the supercooling stage of the food is unstable and the storage time is short, the food is quickly released from the supercooled state and enters the frozen state at this stage, and the temperature is rapidly reduced to release the food from the supercooled state and quickly pass the maximum ice crystal generation zone. The fourth stage (stage 4) is the second stage of the freezing mode. The temperature of the compartment is set to the second freezing temperature, which can ensure long-term storage of food, and is convenient for cutting after being taken out, which is convenient for use.

In some embodiments, referring to FIG. 22, the method for controlling indoor food storage in a refrigerator includes the following steps:

Step 1: Determine whether the refrigerator is in the defrosting mode; when the refrigerator is in the defrosting mode, perform step 2 after completing the defrosting mode; otherwise, stop starting the defrosting process until the first three stages of the supercooling mode are completed until;

Step 2: Enter the first stage of subcooling mode:

Let the preset time of the first stage be t1 and the preset temperature as F1; let the temperature floating value of the first stage be Δ1; the range of the preset temperature F1 is 5℃≤F1≤2℃; the range of the preset time t1 It is 3h≤t1≤6h, and the range of the temperature fluctuation value in the first stage is 0≤Δ1≤3.

Time the first stage and use it as the running time ta of the first stage;

Step 4: Obtain the real-time temperature Fa of the airtight drawer where the food is stored frozen, and determine whether the real-time temperature Fa is greater than the preset temperature F1+Δ1; when the real-time temperature Fa is greater than the preset temperature F1+Δ1, open the compartment damper for checking Perform refrigeration in the corresponding compartment and repeat step 4; otherwise, perform step 5;

Step 5: Determine whether the real-time temperature Fa is greater than the preset temperature F1-Δ1; when the real-time temperature Fa is greater than the preset temperature F1-Δ1, maintain the current cooling situation and return to step 4, otherwise, close the damper to stop the corresponding compartment Refrigeration, so that the temperature of the corresponding compartment rises; and return to step four;

Step 6: Enter the first sub-phase of the second phase of the sub-cooling mode:

Let the preset time of the i-th sub-stage in the first sub-cooling sub-stage be t2i, where i∈{1,2,3,4};

Let the preset temperature of the i-th sub-stage in the first sub-cooling sub-stage be F2i, let the preset compressor speed of the i-th sub-stage of the first sub-cooling sub-stage be S2i, and initialize i=1; let the first sub-cooling The temperature floating value of the sub-stage is Δ2; the range of the preset temperature F2i is -5℃≤F2i≤2℃; and F21≥F22≥F23≥F24; the range of the preset time t2i is 1h≤t2i≤2h; the first pass The temperature fluctuation range of the cooling sub-stage is 0≤Δ2≤2.

Step 7: Timing the i-th sub-stage in the first sub-cooling sub-stage, and use it as the running time tbi of the i-th sub-stage in the first sub-cooling sub-stage;

Step 9: Obtain the real-time temperature Fb of the airtight drawer where the food is stored; and determine whether the real-time temperature Fb is greater than the preset temperature F2i+Δ2; when the real-time temperature Fb is greater than the preset temperature F2i+Δ2, open the compartment air door for corresponding Perform refrigeration in the compartment, and repeat step 9; otherwise, perform step 10, where Δ2≤Δ1;

Step 10: Determine whether the real-time temperature Fb is greater than the preset temperature F2i-Δ2; when the real-time temperature Fb is greater than the preset temperature F2i-Δ2, maintain the current cooling situation and return to step 9; otherwise, close the compartment damper to stop the corresponding room Refrigeration in the chamber; and return to step 9;

Step 11: Assign i+1 to i, and judge whether i>4 is established; when i>4 is established, it means that the second stage is over, and step 12 is executed; otherwise, step 7 is executed;

Step 12: Enter the second sub-phase of the second phase of the sub-cooling mode:

Let the preset time of the second sub-cooling sub-phase be t3 and the preset temperature be F3; let the temperature floating value of the second sub-cooling sub-phase be Δ3; where Δ3≤Δ2≤Δ1; the range of the preset temperature F3 is -10 ℃≤F3≤-5℃; the range of the preset time t3 is 1h≤t3≤3h, and the range of the temperature fluctuation value of the second supercooling sub-stage is 0≤Δ3≤1.

Time the second sub-phase of sub-cooling and use it as the running time tc of the second sub-phase of sub-cooling;

Step 13: Determine whether the running time tc reaches the preset time t3; when the running time tc reaches the preset time t3, it means that the second subcooling sub-phase is over, and step 16 is executed; otherwise, step 14 is executed;

Step 14: Obtain the real-time temperature in the closed drawer where the food is stored as Fc, and determine whether the real-time temperature Fc is greater than the preset temperature F3+Δ3; when the real-time temperature Fc is greater than the preset temperature F3+Δ3, open the compartment damper for Cool the corresponding compartment and repeat step 14; otherwise, go to step 15;

Step 15: Determine whether the real-time temperature Fc is greater than the preset temperature F3-Δ3; when the real-time temperature Fc is greater than the preset temperature F3-Δ3, maintain the current cooling situation and return to step 14, otherwise, close the damper to stop the corresponding The compartment is refrigerated to increase the temperature of the compartment; and return to step fourteen;

Step 16: Enter the third stage of subcooling mode:

Let the preset time of the third stage be t4 and the preset temperature as F4; the preset refrigerator temperature F4 range is F4≤-18°C; the preset time t4 ranges from 2h≤t4≤5h.

Time the third stage and use it as the running time tc of the third stage;

Step 17: Determine whether the running time td reaches the preset time t4; when the running time td reaches the preset time t4, it means that the third stage is over, and step 19 is executed; otherwise, step 18 is executed;

Step 18: Obtain the real-time temperature Fd in the closed drawer where the food is stored, and determine whether the real-time temperature Fd is greater than the preset temperature F4; when the real-time temperature Fd is greater than the preset temperature F4, open the compartment damper for the corresponding compartment Perform refrigeration and repeat step 18; otherwise, close the damper and repeat step 18;

Step 19: Enter the fourth stage of the supercooling mode:

Set the temperature of the compartment where the corresponding food is frozen and stored as F5, where the range of F5 is -18°C≤F5≤-3°C, and the food can have a longer storage period at this temperature.

At this time, the temperature of the super-cooling function room cannot be adjusted. In some embodiments, after the user manually turns off the function button on the display panel, the compartment can be used as a greenhouse again.

The various modules of the above-mentioned indoor food storage control device in the refrigerator room can be implemented in whole or in part by software, hardware and a combination thereof. In some embodiments, each of the above-mentioned modules is embedded in or independent of the processor in the computer device in the form of hardware. In some embodiments, the above-mentioned modules are stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the operations corresponding to the above-mentioned modules.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express a few embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application. Therefore, the scope of protection of the patent of this application shall be subject to the appended claims.

Finally, it should be noted that in this application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is any such actual relationship or sequence between entities or operations. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or equipment that includes the element.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined in this application can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to the embodiments shown in this application, but should conform to the widest scope consistent with the principles and novel features disclosed in this application.

Claims

A method for controlling indoor food storage in a refrigerator, which is characterized in that it comprises the following steps:

Controlling the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset period of time;

Controlling the temperature of the compartment of the refrigerator to maintain the second subcooling temperature for a second preset period of time;

Control the temperature of the compartment of the refrigerator to the set freezing temperature;

The first subcooling temperature is greater than or equal to the second subcooling temperature, the second subcooling temperature is greater than or equal to the set freezing temperature, and the first subcooling temperature is greater than zero degrees Celsius, the The set freezing temperature is less than zero degrees Celsius.
The method according to claim 1, wherein the step of controlling the temperature of the compartment of the refrigerator to a set freezing temperature comprises the following steps:

Control the compressor to run at the maximum allowable speed and maintain the third preset duration;

Maintaining the temperature of the compartment of the refrigerator at the set freezing temperature;

Among them, the temperature of the compartment of the refrigerator is achieved by adjusting the speed of the compressor to control the rate of heat absorption by the refrigerant in the evaporator.
The method according to claim 2, wherein the step of controlling the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset time period comprises the following steps:

Controlling the difference between the actual temperature of the compartment of the refrigerator and the first subcooling temperature to be less than or equal to the first temperature floating value, and maintaining the first preset duration;

Wherein, the first subcooling temperature is greater than or equal to 2°C and less than or equal to 5°C;

The first preset duration is greater than or equal to 3h and less than or equal to 6h;

The first temperature floating value is greater than or equal to 0°C and less than or equal to 3°C.
The method according to claim 3, wherein the second supercooling temperature includes two or more sub-stage temperature thresholds, and the second preset duration includes two or more sub-stage durations; The step of controlling the temperature of the compartment of the refrigerator to maintain the second predetermined period of time at the second supercooling temperature includes the following steps:

The temperature of the compartment of the refrigerator is controlled to gradually cool down in each sub-stage according to the temperature threshold of each sub-stage, and the corresponding sub-stage duration is maintained in each sub-stage.
The method according to claim 4, wherein the temperature of the compartment of the refrigerator is controlled to gradually decrease in each sub-stage according to the temperature threshold of each of the sub-stages, and the corresponding sub-stage duration is maintained in each sub-stage The steps include the following steps:

Controlling the difference between the actual temperature of the compartment of the refrigerator in each sub-stage and the temperature threshold of the sub-stage to be less than or equal to the second temperature floating value, and maintaining the corresponding sub-stage duration;

Wherein, the sub-stage temperature threshold value of each sub-stage is sequentially decreased, and is greater than or equal to -5° C. and less than or equal to 2° C.; the sub-stage duration is greater than or equal to 1 h and less than or equal to 2 h; The value is greater than or equal to 0°C and less than or equal to 2°C.
The method according to claim 5, wherein the second temperature fluctuation value is smaller than the first temperature fluctuation value.
The method according to claim 2, wherein the third preset duration is greater than or equal to 2h and less than or equal to 5h, and the set freezing temperature is greater than or equal to -18°C and less than or equal to -5°C .
The method according to claim 2, characterized in that the compressor rotating speed corresponding to the temperature of the compartment of the control refrigerator being maintained at the first subcooling temperature for a first preset period of time is a first rotating speed, and the first rotating speed is greater than Or equal to 3500rpm, less than or equal to 4500rpm;

The compressor rotation speed corresponding to the temperature of the compartment of the controlled refrigerator being maintained at the second subcooling temperature for the second preset period of time is the second rotation speed, and the second rotation speed is greater than or equal to 1200 rpm and less than or equal to 1800 rpm.
The method according to claim 1, wherein the set freezing temperature includes a first freezing temperature and a second freezing temperature; the step of controlling the temperature of the compartment of the refrigerator to the set freezing temperature includes The following steps:

Controlling the temperature of the compartment of the refrigerator to maintain the first freezing temperature for a third preset period of time;

The temperature of the compartment of the refrigerator is maintained at the second freezing temperature; wherein the temperature adjustment of the compartment of the refrigerator is realized by controlling the evaporation and heat absorption of the refrigerant in the refrigerator evaporator; the second subcooling temperature is greater than or equal to the first freezing temperature. A freezing temperature, the second freezing temperature is greater than the first freezing temperature and less than the second supercooling temperature, and both the first freezing temperature and the second freezing temperature are less than zero degrees Celsius.
The method according to claim 9, wherein the step of controlling the temperature of the compartment of the refrigerator to maintain the first freezing temperature for a third preset period of time includes the following steps:

Controlling the difference between the actual temperature of the compartment of the refrigerator and the first freezing temperature to be less than or equal to the third temperature floating value, and maintaining the third preset duration;

Wherein, the first freezing temperature is less than or equal to -18°C; the third preset duration is greater than or equal to 2h and less than or equal to 5h, and the third temperature floating value is greater than or equal to 0°C and less than or equal to 3°C .
The method according to claim 9, wherein the second freezing temperature is greater than or equal to -18°C and less than or equal to -5°C.
The method according to any one of claims 9-11, wherein the step of controlling the evaporation and heat absorption of the refrigerant in the refrigerator evaporator comprises:

Send a first control signal to the solenoid valve and send a second control signal to the compressor, the compressor is connected to the evaporator through the solenoid valve, the first control signal is used to adjust the opening of the solenoid valve to Causing the refrigerant in the evaporator to evaporate and absorb heat, and the second control signal is used to adjust the speed of the compressor so that the refrigerant in the evaporator evaporates and absorbs heat; or

Send a first control signal to the solenoid valve or send a second control signal to the compressor, the compressor is connected to the evaporator through the solenoid valve, and the first control signal is used to adjust the opening of the solenoid valve to The refrigerant in the evaporator is caused to evaporate and absorb heat, and the second control signal is used to adjust the rotation speed of the compressor so that the refrigerant in the evaporator evaporates and absorbs heat.
The method according to claim 9, wherein the sealed drawer is arranged in the refrigerator compartment, food is placed in the sealed drawer, and the controlling the temperature of the compartment of the refrigerator is controlling the temperature in the sealed drawer of the refrigerator , The temperature adjustment in the sealed drawer is realized by cooling the outside of the sealed drawer.
The method according to claim 13, wherein the second supercooling temperature includes a first temperature and a second temperature, and the second preset duration includes a first duration and a second duration; the control refrigerator The step of maintaining the temperature of the compartment at the second subcooling temperature for a second preset period of time includes the following steps:

Controlling the temperature in the sealed drawer of the refrigerator to maintain the first temperature for the first time period;

The temperature in the sealed drawer of the refrigerator is controlled to maintain the second temperature for the second time period; the second temperature is less than the first temperature.
The method according to claim 14, wherein the first temperature includes two or more sub-phase temperature thresholds, and the first time length includes two or more sub-phase time lengths; the control refrigerator The step of maintaining the temperature in the sealed drawer at the first temperature for the first time period includes the following steps:

The temperature in the sealed drawer of the refrigerator is controlled to gradually cool down in each sub-stage according to the temperature thresholds of each of the sub-stages, and the corresponding sub-stage duration is maintained in each sub-stage.
The method according to claim 15, wherein the step of controlling the temperature in the sealed drawer of the refrigerator to gradually cool down in each sub-stage according to the temperature thresholds of each sub-stage, and maintaining the corresponding sub-stage duration in each sub-stage, comprises The following steps:

Control the difference between the actual temperature of the refrigerator compartment in each sub-stage and the temperature threshold of the sub-stage to be less than or equal to the second temperature floating value, and maintain the corresponding sub-stage duration;

Wherein, the sub-stage temperature threshold of each sub-stage is successively decreased, and is greater than or equal to -5°C and less than or equal to 2°C; the duration of the sub-stage is greater than or equal to 1h and less than or equal to 2h; and the second temperature fluctuation value is greater than Or equal to 0°C, less than or equal to 2°C.
The method according to claim 16, wherein the step of controlling the temperature in the sealed drawer of the refrigerator to maintain the second temperature for the second time period comprises the following steps:

Controlling the difference between the actual temperature in the sealed drawer of the refrigerator and the second temperature to be less than or equal to the fourth temperature floating value, and maintaining the second time duration;

Wherein, the second temperature is greater than or equal to -10°C and less than or equal to -5°C; the second duration is greater than or equal to 1h and less than or equal to 3h; and the fourth temperature floating value is greater than or equal to 0°C and less than Or equal to 1°C.
The method according to claim 17, wherein the fourth temperature fluctuation value is smaller than the second temperature fluctuation value, and the second temperature fluctuation value is smaller than the first temperature fluctuation value.
The method according to claim 13, wherein the second freezing temperature is greater than or equal to -18°C and less than or equal to -3°C.
The method according to any one of claims 13-19, characterized in that, before the step of controlling the temperature in the sealed drawer of the refrigerator to maintain the first supercooling temperature for a first preset period of time, the method further comprises the following steps:

Judge whether the refrigerator is in defrosting mode;

If yes, after the defrosting mode is completed, the step of controlling the temperature in the sealed drawer of the refrigerator to maintain the first subcooling temperature for the first preset time period is performed.
An indoor food storage control device in a refrigerator, which is characterized in that it comprises:

The first-stage control module is used to control the temperature of the compartment of the refrigerator to maintain the first subcooling temperature for a first preset period of time;

The second-stage control module is used to control the temperature of the compartment of the refrigerator to maintain the second subcooling temperature for a second preset period of time;

The freezing control module is used to control the temperature of the refrigerator compartment to the set freezing temperature;

The first subcooling temperature is greater than or equal to the second subcooling temperature, the second subcooling temperature is greater than or equal to the set freezing temperature, and the first subcooling temperature is greater than zero degrees Celsius, the The set freezing temperature is less than zero degrees Celsius.
The device according to claim 21, wherein the freezing control module comprises:

The third stage control module is used to control the compressor to run at the maximum allowable speed and maintain the third preset duration;

The fourth stage control module is used to maintain the temperature of the compartment of the refrigerator at the set freezing temperature; wherein the temperature of the compartment of the refrigerator is achieved by adjusting the speed of the compressor to control the heat absorption rate of the refrigerant in the evaporator.
The device according to claim 21, wherein the set freezing temperature comprises a first freezing temperature and a second freezing temperature, and the freezing control module comprises:

The third stage control module is used to control the temperature of the compartment of the refrigerator to maintain the first freezing temperature for a third preset period of time;

The fourth stage control module is used to maintain the temperature of the compartment of the refrigerator at the second freezing temperature;

Wherein, the temperature adjustment of the compartment of the refrigerator is realized by controlling the evaporation and heat absorption of the refrigerant in the refrigerator evaporator; the second subcooling temperature is greater than or equal to the first freezing temperature, and the second freezing temperature is greater than the first freezing temperature. The freezing temperature is less than the second supercooling temperature, and both the first freezing temperature and the second freezing temperature are less than zero degrees Celsius.
The device according to claim 23, wherein the sealed drawer is arranged in the refrigerator compartment, food is placed in the sealed drawer, and the temperature control of the compartment of the refrigerator is to control the temperature in the sealed drawer of the refrigerator , The temperature adjustment in the sealed drawer is realized by cooling the outside of the sealed drawer.
An indoor food storage control device for a refrigerator room, which is characterized by comprising a refrigeration device, a temperature detection device and a control device, the refrigeration device and the temperature detection device are both connected to the control device, and the temperature detection device is arranged in the refrigerator In the room, the temperature detection device is used to detect the temperature in the refrigerator room and send it to the control device, the refrigeration device is used to cool the refrigerator room, and the control device is used to implement any one of claims 1-22 The described method is controlled.
The apparatus according to claim 25, wherein the refrigeration device comprises a compressor, a solenoid valve, and an evaporator, the compressor is connected to the evaporator through the solenoid valve, and the compressor and the solenoid valve are connected to the evaporator. The valves are all connected to the control device.
The device according to claim 25, wherein the temperature detection device is a thermocouple temperature sensor.
The device according to claim 25, wherein the device further comprises a sealed drawer;

The sealed drawer is arranged in the refrigerator compartment, the refrigeration device is used to cool the sealed drawer outside, and the temperature detection device is used to detect the temperature in the sealed drawer and send it to the control device.
The device according to claim 28, wherein the sealed drawer comprises a drawer body, a sealing ring and a cover plate, and the drawer body and the cover plate are sealed by the sealing ring.
The device according to claim 29, wherein the carrying plate for carrying food in the drawer body is a carrying plate with a honeycomb grid structure.
A refrigerator system, characterized by comprising a refrigerator and the indoor food storage control device in a refrigerator room according to any one of claims 25-30.