WO2021213389A1 - Defrosting control method based on temperature, and defrosting apparatus and refrigerator - Google Patents

Abstract

A defrosting control method based on temperature, and a defrosting apparatus and a refrigerator. The defrosting control method based on temperature comprises: constantly acquiring a defrosting chamber temperature field distribution obtained by means of monitoring an infrared temperature sensing device of a defrosting apparatus, wherein a temperature sensing area of the infrared temperature sensing device is pre-divided into a preset number of grids; determining a temperature value of each grid according to the temperature field distribution; determining, according to temperature values of the grids, a grid in which a defrosted object in the defrosting apparatus is located; controlling the defrosting apparatus to start defrosting, and determining a defrosting temperature for the defrosted object during a defrosting process according to the temperature value of the grid in which the defrosted object is located; and after the defrosting temperature is greater than a preset temperature threshold value, controlling the defrosting apparatus to stop defrosting. By means of the method of the present invention, a temperature value that reflects the actual state of a defrosted object can be accurately obtained, thereby providing an accurate basis for a defrosting apparatus to determine the completion of defrosting, such that insufficient defrosting or excessive defrosting can be effectively prevented, and the defrosting quality is improved.

Description

Temperature-based thawing control method, thawing device and refrigerator Technical field

The invention relates to household appliances, in particular to a temperature-based thawing control method, a thawing device and a refrigerator.

Background technique

Frozen food needs to be thawed before being processed or eaten. The traditional thawing method generally uses a heating device to heat the frozen food. However, the thawing process of the heating device is prone to overheating, which affects the subsequent processing of the food and even causes the loss of food nutrition.

Devices dedicated to thawing have gradually appeared in the prior art, such as radio frequency and microwave technology for thawing. These thawing equipment are improved for heating means, but most of the thawing control methods are still adjusted according to time, for example, timing end thawing. Although some thawing devices can also set the thawing time according to the weight of the thawed object, or adjust the thawing power according to the thawing time, which improves the flexibility of the thawing control to a certain extent, these thawing equipment still cannot guarantee the precise control of the thawing process. As a result, the problem of insufficient thawing or excessive thawing occurs.

Summary of the invention

An object of the present invention is to provide a temperature-based thawing control method, thawing device and refrigerator that at least partially solve any of the above technical problems.

A further object of the present invention is to avoid insufficient thawing and excessive thawing.

Another further object of the present invention is to improve the accuracy of thawing control.

In particular, the present invention provides a temperature-based thawing control method. The method includes: continuously acquiring the temperature field distribution of the thawing cavity detected by the infrared temperature sensing device of the thawing device, and the temperature sensing area of the infrared temperature sensing device is divided into Preset number of grids; determine the temperature value of each grid according to the temperature field distribution; determine the grid where the thawed object in the thawing device is located according to the temperature value of the grid; control the thawing device to open the thawing, and according to the thawing process The temperature value of the grid where the object is located determines the thawing temperature of the thawed object; after the thawing temperature is greater than the preset temperature threshold, the thawing device is controlled to stop thawing.

Optionally, in the thawing process, the step of determining the thawing temperature of the thawed object according to the temperature value of the grid where the thawed object is located includes: searching for the lowest temperature grid with the lowest temperature value from the grid where the thawed object is located, and dividing the lowest temperature grid The temperature value of the grid is used as the thawing temperature.

Optionally, the step of determining the thawing temperature of the thawed object according to the temperature value of the grid where the thawed object is located during the thawing process includes: selecting a reference grid from the grid where the thawed object is located according to the temperature value of the grid where the thawed object is located , Use the average or median temperature of the reference grid as the thawing temperature.

Optionally, the step of selecting a reference grid from the grid where the thawed object is located according to the temperature value of the grid where the thawed object is located includes: finding the lowest temperature grid with the lowest temperature value from the grid where the thawed object is located, and determining The grid adjacent to the lowest temperature grid; from the grids adjacent to the lowest temperature grid, the grid with the lowest temperature difference within the set temperature difference threshold is selected from the grid adjacent to the lowest temperature grid, and the selected grid and the lowest The warm grid serves as the reference grid.

Optionally, the infrared temperature sensing device is configured to continuously detect the temperature field distribution of the thawing cavity according to a preset sampling period; and the step of determining the temperature value of each grid according to the temperature field distribution includes: selecting a continuous set number of sampling points for thawing Cavity temperature field distribution; extract the temperature sampling value of each grid from the temperature field distribution of the thawing cavity at each sampling point to obtain the temperature sampling value sequence of each grid, and proceed through the temperature sampling value sequence of each grid Calculate the temperature value of each grid.

Optionally, the step of calculating the temperature value of each grid through the temperature sampling value sequence of each grid includes: screening the extreme value from the temperature sampling value sequence of each grid, and taking each grid The average or median value of the remaining temperature sampling values after the extreme value is filtered out of the temperature sampling value sequence of the grid is used as the temperature value of the corresponding grid.

Optionally, the step of determining the grid where the thawed object in the thawing device is located according to the temperature value of the grid includes: using a grid with a temperature value within a preset thawing temperature range as the grid where the thawed object is located.

Optionally, before the step of continuously acquiring the temperature field distribution of the thawing cavity detected by the infrared temperature sensing device of the thawing device, the method further includes: acquiring the event that the thawing cavity is put into the thawed object.

According to another aspect of the present invention, a thawing device is also provided. The thawing device includes: an infrared temperature sensing device configured to detect the temperature field distribution of the thawing cavity of the thawing device, and the temperature sensing area of the infrared temperature sensing device is divided into a preset number of grids in advance; a control device, which includes a memory And a processor, a control program is stored in the memory, and when the control program is executed by the processor, it is used to implement any one of the above-mentioned temperature-based thawing control methods.

According to another aspect of the present invention, a refrigerator is also provided. The refrigerator includes: a box body defining at least one accommodating space therein; a thawing device arranged in the accommodating space, and the thawing device is the above-mentioned thawing device.

The temperature-based thawing control method of the present invention uses an infrared temperature sensing device capable of detecting temperature field distribution as the detection device, and divides the temperature sensing area of the infrared temperature sensing device into a preset number of grids in advance, according to the infrared temperature sensing device Determine the temperature value of each grid, determine the grid where the thawed object is located, and further determine the thawing temperature of the thawed object according to the temperature value of the grid where the thawed object is located during the thawing process; it can accurately reflect the thawing The temperature value of the actual state of the object is accurately detected and provides an accurate basis for the thawing device to determine the completion of thawing. Since the thawing temperature is used as the basis for judging the completion of thawing, insufficient thawing or excessive thawing can be effectively avoided, and the quality of thawing can be improved.

Further, the temperature-based thawing control method of the present invention calculates the temperature value according to the temperature sampling value sequence of each grid, which avoids the detection deviation caused by the measurement fluctuation.

Furthermore, the temperature-based thawing control method of the present invention searches for the lowest temperature grid with the lowest temperature value from the grid where the thawed object is located, determines the grid adjacent to the lowest temperature grid, and selects the reference grid from the grid Grid; this selection method can determine the detection area that can reflect the temperature state of the thawed object, so that a temperature value that is more in line with the requirements of the thawing control judgment basis can be obtained.

Still further, the temperature-based thawing control method of the present invention can be applied to a refrigerator provided with a thawing device, which enriches the functions of the refrigerator and improves the convenience of users of the refrigerator.

Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will better understand the above and other objectives, advantages and features of the present invention.

Description of the drawings

Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary but not restrictive manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic structural diagram of a thawing device according to an embodiment of the present invention;

Figure 2 is a schematic block diagram of a thawing device according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

4 is a schematic diagram of a temperature-based thawing control method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the temperature sensing area where the infrared temperature sensing device is divided into grids in the temperature-based thawing control method according to an embodiment of the present invention; and

Fig. 6 is a schematic diagram of a use process of a temperature-based thawing control method according to an embodiment of the present invention.

Detailed ways

Fig. 1 is a schematic structural diagram of a thawing device 200 according to an embodiment of the present invention. Fig. 2 is a schematic block diagram of a thawing device 200 according to an embodiment of the present invention. The thawing device 200 of this embodiment may generally include: a housing 201, an infrared temperature sensing device 210, and a control device 220. A thawing cavity 202 is formed in the housing 201 to prevent thawed objects. In order to facilitate the illustration of the internal structure, the door of the thawing device 200 is not shown in FIG. 1. The thawing device 200 may use radio frequency thawing, microwave thawing, and heating thawing methods to defrost the thawed objects placed in the thawing cavity 202. For example, for radio frequency thawing, a radio frequency plate can be arranged in the thawing cavity 202, and the radio frequency plate can be used to output a radio frequency signal to achieve thawing; for another example, a microwave thawing can be achieved by outputting a microwave signal from a magnetron. Since the thawing component of the thawing device 200 is well known to those skilled in the art, it will not be further described here.

The infrared temperature sensing device 210 is configured to continuously detect the temperature field distribution of the thawing cavity 202 of the thawing device 200. The infrared temperature sensing device 210 can put the thawed object in the thawing cavity 202 and continuously detect the temperature field distribution of the thawing cavity 202 during the thawing process. That is, the infrared temperature sensing device 210 can detect the temperature field in the temperature sensing area 211, similar to the sensing method of forming an infrared image, to obtain the temperature of each position of the temperature sensing area 211. In this embodiment, the temperature sensing area 211 of the infrared temperature sensing device 210 may be divided into a preset number of grids in advance. The infrared temperature sensing device 210 may be arranged on the top of the thawing cavity 202, so as to divide the thawing cavity 202 into a grid from a top angle. Those skilled in the art can install the infrared temperature sensing device 210 on each cavity wall of the thawing cavity 202 as needed. The temperature sensing lens of the infrared temperature sensing device 210 can be sensed through the opening of the housing 201.

The control device 220 may generally include: a memory 222 and a processor 221, wherein the memory 222 stores a control program 223, and the control program 223 is used to implement the temperature-based thawing control method of this embodiment when the control program 223 is executed by the processor 221. The processor 221 may be a central processing unit (central processing unit, CPU for short), or a digital processing unit (Digital Signal Processing, DSP), or the like. The memory 222 is used to store a program executed by the processor 221. The memory 222 is any medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, and can also be a combination of multiple memories. The aforementioned control program 223 may be downloaded from a computer-readable storage medium to a corresponding computing/processing device or downloaded and installed to the defrosting device 200 via a network (for example, the Internet, a local area network, a wide area network, and/or a wireless network).

FIG. 3 is a schematic structural diagram of a refrigerator 10 according to an embodiment of the present invention, in which all outer doors of the refrigerator 10 are removed to show the compartment structure in the cabinet 100 of the refrigerator 10. The refrigerator 10 may generally include a box body 100 that defines at least one accommodating space, a compartment door for opening and closing the access ports of each accommodating space, and a thawing device 200 arranged in one accommodating space. In the illustrated embodiment, the number of the thawing device 200 is one.

In some embodiments, the number of accommodating spaces of the refrigerator 10 may be three. Specifically, the refrigerator 10 may include a box body 100 defining a refrigerating compartment 110, a temperature-changing compartment 120, and a freezing compartment 130, and a refrigerator for opening and closing the refrigerating compartment 110, the temperature-changing compartment 120, and the freezing compartment 130, respectively. Door body, variable temperature door body and freezer door body. The thawing device 200 may be installed in the temperature-variable compartment 120. The thawing device 200 can be fixed in the temperature-variable compartment 120 by interference fit or clamping with the inner walls of the two vertical sides of the temperature-variable compartment 120. The thawing switch can be set on the variable temperature door.

In addition, as known to those skilled in the art, the refrigerating compartment 110 refers to a storage compartment with a storage temperature of 0～+8°C for food materials; the freezer compartment 130 refers to a storage temperature for food materials ranging from -20～ -15℃ storage compartment; variable temperature compartment 120 refers to a storage room whose storage temperature can be changed in a large range (for example, the adjustment range can be above 4℃ and can be adjusted to above 0℃ or below 0℃) In general, the storage temperature of the room can span refrigeration, soft freezing (generally -4 to 0°C) and freezing temperature, preferably -16 to +4°C.

In some embodiments, the refrigerator 10 according to the present invention may be an air-cooled refrigerator, and uses an evaporator of a compression refrigeration system as a cold source. Since the air-cooled refrigerator and its refrigeration system are well known to those skilled in the art, they will not be described in detail in this embodiment.

The thawing device 200 of this embodiment may preferably adopt a radio frequency thawing method, which is more suitable for the refrigerator 10, enriches the functions of the refrigerator 10, and improves the convenience of the refrigerator users.

The thawing device 200 of this embodiment uses the infrared temperature sensing device 210 to detect the temperature of the thawed object, and improves the temperature processing method. It can accurately obtain the temperature value reflecting the actual state of the thawed object, and the detection is accurate. Thawing control provides an accurate basis. The thawing device 200 of this embodiment will be further introduced below in conjunction with the description of the temperature-based thawing control method of this embodiment.

Fig. 4 is a schematic diagram of a temperature-based thawing control method according to an embodiment of the present invention. The temperature-based thawing control method may generally include:

Step S402, continuously acquiring the temperature field distribution of the thawing cavity detected by the infrared temperature sensing device 210 of the thawing device 200. Before step S402, the event that the thawing cavity 202 is put into the thawed object can be acquired, that is, it is determined that the thawed object is put into the thawing cavity 202. The event that the thawing cavity 202 is put into the thawed object may include: the event that the door of the thawing device 200 is closed, that is, the action of detecting the user closing the door after putting the thawed object in. Or, the operating interface of the thawing device 200 receives the thawing trigger signal input by the user, that is, the user indicates that the thawing device 200 has been placed in the thawing object through a thawing switch or other control device. Or the article detector of the thawing device 200 detects that the article is placed in the thawing cavity 202. The article detector may be a weighing device, a radio frequency generating device that detects an article placed in the thawing cavity 202 through a change in the dielectric constant, or an image recognition device that determines that the thawed article is placed through image recognition. In some embodiments, the thawing device 200 may integrate one or more of the above methods to detect the put thawed object. After it is determined that the thawing cavity 202 is placed in the thawed object, the infrared temperature sensing device 210 of the thawing device 200 is activated, and the temperature of the thawing cavity 202 is detected.

FIG. 5 is a schematic diagram of the temperature-sensitive area 211 divided into grids by the infrared temperature-sensing device 210 in the temperature-based thawing control method according to an embodiment of the present invention. For ease of description, the grid of the temperature-sensitive area 211 in FIG. 5 uses the sequence numbers of its rows and columns as coordinates. For example, (X1, Y1) refers to the grid in the first row and first column, (X2, Y1) refers to the grid in the second row and first column, and so on. That is to say, the temperature sensing area 211 of the infrared temperature sensing device 210 forms a grid similar to a matrix. By detecting the temperature of each grid, the temperature at different positions of the thawing cavity 202 can be determined. The method of this embodiment can accurately determine the position of the thawed object through the grid-based temperature detection method. The size of the specific grid and the number of divisions can be configured according to the temperature sensing requirements and the performance of the infrared temperature sensing device 210. The division method in FIG. 5 is only an example, and those skilled in the art can adjust it as needed.

In step S404, the temperature value of each grid is determined according to the temperature field distribution, that is, the temperature value of each grid is determined according to the detection result of the infrared temperature sensing device 210. In order to avoid fluctuations in the data of a temperature sampling, the accurate temperature can be obtained by processing multiple sampling values. For example, the infrared temperature sensing device 210 is configured to continuously detect the temperature field distribution of the thawing cavity according to a preset sampling period. The step of determining the temperature value of each grid according to the temperature field distribution may include: selecting the temperature field distribution of the thawing cavity of a continuously set number of sampling points; extracting each grid separately from the temperature field distribution of the thawing cavity of each sampling point The temperature sampling value of each grid is obtained, and the temperature sampling value sequence of each grid is calculated to obtain the temperature value of each grid. The infrared temperature sensing device 210 can set a sampling period according to its own detection capability, for example, at a frequency of 2 to 10 times per second, to continuously collect the temperature of multiple points. The above-mentioned sampling point specifically refers to the measurement time when the temperature measurement is performed.

The step of determining the temperature value of each grid is by filtering the extreme value (such as the maximum and/or minimum) from the temperature sampling value sequence of each grid, and taking the temperature sampling value sequence of each grid to filter out The average or median value of the remaining temperature sampling values after the extreme value is used as the temperature value of the corresponding grid, which avoids sampling errors.

For example, for the grid of (X5, Y4), the temperature of 10 consecutive collection points are: -18.2 degrees, -18.4 degrees -, -18.6 degrees, -18.3 degrees, -18.3 degrees, -17.9 degrees, -18 degrees, -18.1 Degrees, -18.1 degrees, -18.2 degrees, remove the two extreme values (maximum and minimum), calculate the average value as -18.2 degrees, then the temperature value of the grid of (X5, Y4) obtained by this measurement can be determined It is -18.2 degrees.

Detect the grids shown in Figure 5 in turn, and get the temperature values of each grid as shown in Table 1:

Table 1

To	Y1	Y2	Y3	Y4	Y5	Y6	Y7	Y8
X1	2.2	2.1	2.2	2.2	2.5	2.3	2.1	2.1
X2	2.4	2.1	2.3	2.1	2	2.1	2.3	2.3
X3	2.2	2.1	2.3	2.3	2	2	2.1	2.4
X4	2.3	-8.9	-9.8	-10.3	-9.6	-7.2	2.1	2.1
X5	2.2	-7.3	-17.2	-18.2	-17.9	-9.3	2.3	2.4
X6	2.3	-6.5	-17.3	-17.5	-17.3	-8.7	2.1	2.4
X7	2.1	-6.9	-7.5	-8.1	-8.3	-7.9	2.3	2.4
X8	2.1	2.2	2.2	2.3	2.4	2.2	2.2	2.4

Step S406: Determine the grid where the thawed object in the thawing device 200 is located according to the temperature value of the grid. For example, a grid with a temperature value within a preset thawing temperature range may be used as the grid where the thawed object is located. The actual temperature of the thawed object is generally below the freezing point, which is significantly different from the temperature of other areas in the thawing cavity 202. Those skilled in the art can set a preset thawing temperature range according to the freezing point temperature of the thawed object to determine the location of the thawed object in the thawing device 200 Grid. With the example temperature shown in Table 1, it can be determined that the X5, Y3), (X5, Y4), (X5, Y5), (X5, Y6), (X6, Y3), (X6, Y4), (X6, Y5), (X6, Y6), (X7, The area 510 composed of Y3), (X7, Y4), (X7, Y5), and (X7, Y6) is the area where the thawed object is located.

In step S408, the thawing device 200 is controlled to turn on the thawing, and during the thawing process, the thawing temperature of the thawed object is determined according to the temperature value of the grid where the thawed object is located. The thawing temperature of the thawed object is calculated according to the temperature value of the grid where the thawed object is located. An optional calculation method is to find the lowest temperature grid with the lowest temperature value from the grid where the thawed object is located, and use the temperature value of the lowest temperature grid as the thawing temperature. That is, the lowest temperature is used as the control basis for the completion of thawing. This method can ensure that after the thawing is completed, there is no problem of insufficient thawing of the thawed material.

Another optional calculation method is to select a reference grid from the grid where the thawed object is located according to the temperature value of the grid where the thawed object is located, and use the average or median temperature of the reference grid as the thawing temperature. The reference grid selection process can be: find the lowest temperature grid with the lowest temperature from the grid where the thawed object is located, and determine the grid adjacent to the lowest temperature grid; from the grid adjacent to the lowest temperature grid Select the grid whose temperature difference with the lowest temperature grid is within the set temperature difference threshold from the grid, and use the selected grid and the lowest temperature grid as the reference grid; take the temperature value of the reference grid and the lowest temperature grid The average value or the median value of the temperature value is used as the thawing temperature of the thawed object. This method of thawing temperature uses the lowest temperature point of the thawed object and the temperature in the surrounding area as the judgment basis, avoiding the problem of excessive thawing in other areas caused by a low temperature at a certain point, and the temperature of the reference grid is used as the thawing temperature. Determine the overall thawing degree of the thawed object more accurately. In this embodiment, this method of using the reference grid as the thawing temperature can be preferably adopted.

Taking the example temperature shown in Table 1, the grid corresponding to the lowest temperature point of -18.2 degrees according to the rule is (X5, Y4), and the adjacent coordinates are: (X4, Y3), (X4, Y4), (X4, Y5), (X5, Y3), (X5, Y5), (X6, Y3), (X6, Y4), (X6, Y5), and the area of area 520 in Fig. 5 is the lowest temperature grid of thawed objects and The area where the reference grid is located. If the set temperature difference threshold is set to 2 degrees, the grids whose absolute value of the temperature difference is less than 2 degrees include (X5, Y3), (X5, Y5), (X6, Y3), (X6, Y4), (X6, , The thawing temperature of the thawed object is -17.6° C. Those skilled in the art can set and set the temperature difference threshold as needed, and generally the temperature difference threshold can be set between plus or minus 3 to 0.

By determining the reference grid, the area around the lowest temperature of the thawed object can be determined, so that the temperature value that can best reflect the actual state of the thawed object can be obtained. The thawing temperature obtained through step S402 to step S408 can be used as the basis for thawing control. The process is controlled more precisely.

In step S410, after the thawing temperature is greater than the preset temperature threshold, the thawing device is controlled to stop thawing. The temperature threshold may be set according to the temperature of the thawed object, for example, the value range may be -4 degrees Celsius to -1 degrees Celsius. That is, after the thawing temperature reaches the preset temperature threshold, the thawing process is considered complete.

The method of this embodiment can accurately obtain the temperature value reflecting the actual state of the thawed object, and the detection is accurate, which provides an accurate basis for the thawing device to determine the completion of thawing, can effectively avoid insufficient thawing or excessive thawing, and improve the quality of thawing.

Fig. 6 is a schematic diagram of the use process of a temperature-based thawing control method according to an embodiment of the present invention. When the temperature-based thawing control method of this embodiment is used, the following process can be executed:

Step S602, a defrosting start command is obtained;

In step S604, it is determined whether the door of the thawing device 200 is in a closed state, so as to avoid the leakage of the thawing signal. If the door is not closed properly, it will output a door closing reminder;

Step S606: Start the infrared temperature sensing device 210 to obtain the detection results of multiple consecutive sampling points;

In step S608, the extreme value is filtered from the temperature sampling value sequence of each grid, and the average or median value of the remaining temperature sampling value after filtering the extreme value in the temperature sampling value sequence of each grid is taken as the corresponding grid The temperature value of the grid;

Step S610: Determine the grid where the thawed object in the thawing device is located according to the temperature value of the grid;

Step S612, start the radio frequency thawing module or other thawing modules to start thawing the thawed objects;

In step S614, the lowest temperature grid with the lowest temperature value is searched from the grid where the thawed object is located, and the temperature difference with the lowest temperature grid is selected from the grids adjacent to the lowest temperature grid within the set temperature difference threshold. Grid, using the lowest temperature grid and the selected grid as the reference grid;

Step S616, taking the average or median temperature of the reference grid as the thawing temperature of the thawed object;

Step S618, judging whether the thawing temperature is greater than a preset temperature threshold;

In step S620, after the thawing temperature is greater than the preset temperature threshold, the thawing device 200 is controlled to stop thawing.

The method of this embodiment can determine the area and temperature that can reflect the actual thawing state of the thawed object, so that a temperature value that is more in line with the requirements of the thawing control judgment basis can be obtained, the detection is accurate, and the subsequent thawing control of the thawing device 200 can be provided. Accurate basis, effectively avoid over-freezing or under-thawing.

So far, those skilled in the art should realize that although multiple exemplary embodiments of the present invention have been illustrated and described in detail herein, they can still be disclosed according to the present invention without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications that conform to the principles of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all these other variations or modifications.

Claims (10)

1. A temperature-based thawing control method, including:

   Continuously acquiring the temperature field distribution of the thawing cavity detected by the infrared temperature sensing device of the thawing device, and the temperature sensing area of the infrared temperature sensing device is divided into a preset number of grids in advance;

   Determining the temperature value of each grid according to the temperature field distribution;

   Determining the grid where the thawed object in the thawing device is located according to the temperature value of the grid;

   Controlling the thawing device to turn on thawing, and determining the thawing temperature of the thawed object according to the temperature value of the grid where the thawed object is located during the thawing process;

   After the thawing temperature is greater than the preset temperature threshold, the thawing device is controlled to stop thawing.
2. The method according to claim 1, wherein the step of determining the thawing temperature of the thawed object according to the temperature value of the grid where the thawed object is located during the thawing process comprises:

   Find the lowest temperature grid with the lowest temperature value from the grid where the thawed object is located, and use the temperature value of the lowest temperature grid as the thawing temperature.
3. The method according to claim 1, wherein the step of determining the thawing temperature of the thawed object according to the temperature value of the grid where the thawed object is located during the thawing process comprises:

   A reference grid is selected from the grid where the thawed object is located according to the temperature value of the grid where the thawed object is located, and the temperature average or median value of the reference grid is used as the thawing temperature.
4. The method according to claim 3, wherein the step of selecting a reference grid from the grid where the thawed object is located according to the temperature value of the grid where the thawed object is located comprises:

   Searching for the lowest temperature grid with the lowest temperature value from the grid where the thawed object is located, and determining the grid adjacent to the lowest temperature grid;

   From the grids adjacent to the lowest temperature grid, select a grid whose temperature difference with the lowest temperature grid is within a set temperature difference threshold, and use the selected grid and the lowest temperature grid as all the grids. The reference grid.
5. The method of claim 1, wherein:

   The infrared temperature sensing device is configured to continuously detect the temperature field distribution of the thawing cavity according to a preset sampling period; and

   The step of determining the temperature value of each grid according to the temperature field distribution includes:

   Selecting the temperature field distribution of the thawing cavity for a continuously set number of sampling points;

   Extract the temperature sampling value of each grid from the temperature field distribution of the thawing cavity of each sampling point to obtain the temperature sampling value sequence of each grid. The temperature sampling value sequence is calculated to obtain the temperature value of each grid.
6. The method according to claim 5, wherein the step of calculating the temperature value of each of the grids by calculating the temperature sampling value sequence of each of the grids comprises:

   The extreme value is filtered from the temperature sampling value sequence of each grid, and the average or median value of the remaining temperature sampling value after filtering the extreme value in the temperature sampling value sequence of each grid is taken as the corresponding The temperature value of the grid.
7. The method according to claim 1, wherein the step of determining the grid where the thawed object in the thawing device is located according to the temperature value of the grid comprises:

   Use the grid whose temperature value is within a preset preset thawing temperature range as the grid where the thawed object is located.
8. The method according to claim 1, wherein before the step of continuously obtaining the temperature field distribution of the thawing cavity detected by the infrared temperature sensing device of the thawing device, the method further comprises:

   Obtain the event that the thawing cavity is put into the thawed object.
9. A thawing device includes:

   An infrared temperature sensing device configured to detect the temperature field distribution of the thawing cavity of the thawing device, and the temperature sensing area of the infrared temperature sensing device is divided into a preset number of grids in advance;

   A control device comprising a memory and a processor, and a control program is stored in the memory. When the control program is executed by the processor, it is used to implement the temperature-based Thawing control method.
10. A refrigerator including:

    The box body defines at least one accommodating space therein;

    The thawing device is arranged in one of the accommodating spaces, and the thawing device is the thawing device according to claim 9.

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