CN114909868A - Meat preservation method and refrigerator - Google Patents

Abstract

The embodiments of the present application provide a fresh-keeping method and refrigerator for meat pieces. The fresh-keeping method for meat pieces is applied to a refrigerator, the refrigerator includes a compartment, and the fresh-keeping method includes: when the compartment is in a chilled-fresh mode, detecting whether there are ice crystals in the meat pieces, and if detecting the presence of ice crystals in the meat pieces, Then, the storage mode of the meat block is converted from the frozen meat state to the soft frozen meat state, and the magnetic field module is controlled to operate in the first mode; if it is detected that there is no ice crystal in the meat block, the storage mode of the meat block is changed from The fresh meat state is converted into a soft frozen meat state, and the magnetic field module is controlled to operate in a second mode, wherein the second mode is different from the first mode. In the embodiment of the present application, the storage method of the meat block is determined by judging whether ice crystals exist in the meat block, and the operation mode corresponding to the magnetic field module is adjusted according to different storage methods, so as to meet the personalized requirements for the preservation of the meat block, so that the meat block is in the best position. in good condition.

Description

Meat preservation method and refrigerator

technical field

The present application relates to the field of household appliances, and in particular, to a method for preserving meat pieces and a refrigerator.

Background technique

With the development of the economy and the improvement of people's living standards, refrigerators have become a necessity for every family. People put forward higher requirements for the preservation quality of food materials. In order to solve the problem of food storage, especially the problem that the quality of meat will be reduced in the process of freezing storage, advanced food freezing storage technology and diversified food cold chain system have become the focus of research in the world today.

However, the existing refrigerators can only achieve micro-freezing or soft-freezing of fresh meat through temperature control, which will cause repeated freezing and thawing of the meat and affect the taste and nutrition of the meat.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a fresh-keeping method for meat pieces and a refrigerator, which can improve the situation that the existing refrigerators have insufficient fresh-keeping of meat pieces.

The embodiments of the present application provide a fresh-keeping method for meat pieces, which is applied to a refrigerator, wherein the refrigerator includes a compartment, and the fresh-keeping method includes:

When the compartment is in chilled mode, detect the presence of ice crystals in the meat;

If it is detected that the meat block has ice crystals, the storage state of the compartment is converted from the frozen meat state to the soft frozen meat state, and the magnetic field module is controlled to operate in the first mode;

If it is detected that there are no ice crystals in the meat, the storage state of the compartment is converted from a fresh meat state to a soft frozen meat state, and the magnetic field module is controlled to operate in a second mode, wherein the second mode and the The first mode is different.

Optionally, the controlling the magnetic field module to operate in the first mode includes:

Control the magnetic field module to operate in static magnetic field mode;

The temperature of the current compartment is acquired, and if the temperature reaches a first preset temperature, the static magnetic field is turned off and the alternating magnetic field is turned on.

Optionally, the controlling the magnetic field module to operate in the second mode includes:

Acquire the temperature of the current compartment, and if the temperature reaches the second preset temperature, control the magnetic field module-static magnetic field module to operate;

The temperature of the current compartment is acquired again, and if the temperature reaches a third preset temperature, the static magnetic field is turned off and the alternating magnetic field is turned on, and the second preset temperature is greater than the third preset temperature.

Optionally, after the static magnetic field is turned off and the alternating magnetic field is turned on, the preservation method includes:

measuring the ice crystal size of the meat pieces at first preset time intervals;

The strength of the alternating magnetic field is adjusted according to the size of the ice crystal, and the size of the ice crystal of the meat piece is positively correlated with the strength of the alternating magnetic field.

Optionally, the magnetic field strength for controlling the operation of the static magnetic field is between 50 mt and 100 mt, the magnetic field strength for controlling the operation of the alternating magnetic field is between 0 mt and 10 mt, and the frequency is between 0 Hz and 50 Hz.

Optionally, the preservation method also includes:

When the compartment is in chilled mode, detect the presence of ice crystals in the meat;

If it is detected that there is no ice crystals in the meat, determining that the storage state of the compartment is the preservation mode, and controlling the magnetic field module to operate in the third mode;

If it is detected that there are ice crystals in the meat, it is determined that the cooling mode of the compartment is wrong, and an operation error is prompted, and the control magnetic field is not turned on.

Optionally, the controlling the magnetic field module to operate in the third mode includes:

After controlling the static magnetic field to operate at a first magnetic field strength for a second preset time, the static magnetic field is operated at a second magnetic field strength, wherein the first magnetic field strength is smaller than the second magnetic field strength.

The embodiment of the present application also provides a refrigerator, comprising:

a compartment, the compartment includes a drawer and a top arranged oppositely, and an air outlet is arranged on the top;

a camera, the camera is arranged on the side of the top facing the drawer, and is used to detect whether ice crystals exist in the meat;

a magnetic field module, the magnetic field module is arranged on the side of the drawer facing the top, and the magnetic field module is used for releasing the magnetic field to keep the meat pieces fresh;

a controller, the controller is electrically connected to the camera and the magnetic field module, the controller is configured to:

If it is detected that the meat block has ice crystals, the storage state of the compartment is converted from the frozen meat state to the soft frozen meat state, and the magnetic field module is controlled to operate in the first mode;

If it is detected that there are no ice crystals in the meat, the storage state of the compartment is converted from a fresh meat state to a soft frozen meat state, and the magnetic field module is controlled to operate in a second mode, which is the same as the first mode. mode is different. Optionally, the refrigerator further includes a temperature sensor, the temperature sensor is electrically connected to the controller, the temperature sensor is arranged on the side of the top opposite to the drawer, and is used to detect the temperature of the compartment. temperature;

Wherein, when the controller controls the magnetic field module to operate in the first mode, the controller controls the magnetic field module to operate in the static magnetic field mode;

The temperature sensor acquires the temperature of the current compartment and sends it to the controller. If the temperature reaches a first preset temperature, the controller turns off the static magnetic field and turns on the alternating magnetic field.

Optionally, a constant temperature cold storage box is provided on the top, and the cold storage box is used to keep the temperature of the compartment uniform.

The beneficial effects of the present application are: in the method for preserving meat pieces provided by the embodiments of the present application, when the compartment is in the chilled-fresh mode, whether the meat pieces have ice crystals is detected, and if the meat pieces have ice crystals, it is determined that the storage state of the meat pieces is frozen The meat state is transformed into a soft frozen meat state, and the magnetic field module is controlled to operate in the first mode. If there is no ice crystals in the meat, it is determined that the storage state of the meat is from a fresh meat state to a soft frozen meat state, and the magnetic field module is controlled to operate in the first mode. Two-mode operation. By judging whether there are ice crystals in the meat, the storage method of the meat can be determined, and the corresponding operation mode of the magnetic field module can be adjusted according to the different storage methods of the meat, so as to meet the individual needs of meat storage and make the meat in the best state. . In addition, the magnetic field module in this method is converted according to the storage state of the meat pieces, which realizes the conversion of the fresh meat state of the meat pieces to the soft frozen meat state or from the frozen meat state to the soft frozen meat state in one step, avoiding the repeated meat state. Freezing and thawing affect the taste and nutrition of meat.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

For a more complete understanding of the present application and its beneficial effects, the following description will be made with reference to the accompanying drawings. Here, the same reference numerals denote the same parts in the following description.

Fig. 1 is the first schematic flow chart of the preservation method of meat pieces provided by the embodiment of this application.

FIG. 2 is a schematic flowchart of controlling the magnetic field module to operate in a first mode in the fresh-keeping method shown in FIG. 1 .

FIG. 3 is a schematic flowchart of controlling the magnetic field module to operate in the second mode in the fresh-keeping method shown in FIG. 1 .

FIG. 4 is a second schematic flowchart of the fresh-keeping method for meat pieces provided in the embodiment of the present application.

FIG. 5 is a schematic diagram of a first structure of a refrigerator according to an embodiment of the present application.

FIG. 6 is a cross-sectional view of the refrigerator shown in FIG. 5 along the direction A-A.

FIG. 7 is a schematic diagram of a second structure of a refrigerator according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

The existing refrigerators can only achieve micro-freezing or soft-freezing of fresh meat through temperature control, which will cause repeated freezing and thawing of the meat and affect the taste and nutrition of the meat. During the storage process of frozen meat, the formation and volume growth of ice crystals can puncture the cells and cause serious loss of juice, which is also not conducive to the preservation and thawing of frozen meat.

Therefore, in order to solve the above-mentioned problems, the present application proposes a fresh-keeping method and refrigerator for meat pieces. The present application will be further described below with reference to the accompanying drawings and embodiments.

Please refer to FIG. 1. FIG. 1 is a first schematic flow chart of a method for preserving meat pieces according to an embodiment of the present application. The embodiment of the present application provides a fresh-keeping method for meat pieces, and the method is applied to a refrigerator, and the refrigerator includes a compartment, and the specific process is as follows:

101. When the compartment is in the chilled mode, detect whether there are ice crystals in the meat.

The meat is shot through the camera, and the captured image is sent to the controller. The controller detects whether ice crystals appear in the meat according to the image. If ice crystals are detected in the meat, it means that the current state of the meat is frozen meat. If no ice crystals are detected in the meat, it means that the current state of the meat is fresh meat.

It should be noted that, when the compartment is in the chilled mode, the compartment may be a freezer compartment for chilling food materials, or the compartment may be a changing greenhouse, and the current compartment is in the chilled mode.

According to the current state of the compartment being chilled, it can be determined that the user wants to determine that the final state of the meat block is a soft frozen state, and then the storage state of the meat block can be determined according to the current state of the meat block.

102. If the presence of ice crystals in the meat block is detected, the storage state of the compartment is converted from the frozen meat state to the soft frozen meat state, and the magnetic field module is controlled to operate in the first mode.

If ice crystals are detected in the meat, it means that the current state of the meat is frozen meat, and the storage state of the compartment can be converted from the frozen meat state to the soft frozen meat state, that is, the meat block is converted from the frozen meat state to the soft frozen meat state. In the meat state, the controller will control the magnetic field module to operate in the first mode.

Among them, the magnetic field released by the magnetic field module can inhibit the growth of meat microorganisms and prolong the storage and preservation period. In addition, the magnetic field can inhibit the nucleation of ice crystals, so that the meat can be slightly frozen or not frozen for 7 days in the soft freezing mode.

103. If it is detected that there is no ice crystal in the meat, the storage state of the compartment is converted from the fresh meat state to the soft frozen meat state, and the magnetic field module is controlled to operate in a second mode, wherein the second mode is different from the first mode.

If it is detected that no ice crystals appear in the meat, it means that the current state of the meat is fresh meat, and then the storage state of the compartment can be converted from fresh meat to soft frozen meat, that is, the meat is converted from fresh meat to soft In the frozen meat state, the magnetic field module will be controlled to operate in the second mode.

It can be understood that the temperature value corresponding to the frozen meat state is smaller than the temperature value corresponding to the soft frozen meat state. Therefore, when the magnetic field module is controlled to operate in the first mode, the temperature of the compartment is heated, and the temperature corresponding to the fresh meat state is The value is greater than the temperature value corresponding to the state of soft frozen meat. Therefore, when the magnetic field module is controlled to operate in the second mode, the temperature of the compartment is performed. Therefore, the second mode of operation of the magnetic field module is different from the first mode.

In the embodiment of the present application, the storage mode of the meat chunks is determined by judging whether there are ice crystals in the meat chunks when the compartment is in a chilled state, and the operation mode corresponding to the magnetic field module is adjusted according to the different storage modes of the meat chunks, so as to satisfy the storage requirements of the meat chunks. In addition, the magnetic field module in this method converts with the storage state of the meat block, and realizes the conversion of the fresh meat state of the meat block to the soft frozen meat state or from the frozen meat state to the soft frozen meat state in one step. The storage state is not converted or changed in the intermediate process, which avoids the situation that the repeated freezing and thawing of the meat affects the taste and nutrition of the meat.

Please continue to refer to FIG. 2 , which is a schematic flowchart of controlling the magnetic field module to operate in the first mode in the fresh-keeping method shown in FIG. 1 .

201. Control the magnetic field module to operate in a static magnetic field mode.

When it is determined that the storage state of the meat piece is transformed from the frozen meat state to the soft frozen meat state, the controller controls the static magnetic field to operate at a first magnetic field strength, and in some embodiments, controls the static magnetic field to operate at the first magnetic field strength in a range of 50 mt to 100mt. The specific magnetic field strength of the static magnetic field needs to be set according to actual needs, which is not specifically limited here.

It should be noted that the magnetic field module may be a static magnetic field, an alternating magnetic field or a pulsed magnetic field, wherein the type of the magnetic field is changed by changing the power supply for the magnetic field. This embodiment is described by taking the magnetic field module as a static magnetic field and an alternating magnetic field as an example, which should not be construed as a limitation on the magnetic field module. The specific design of the magnetic field module needs to be set according to the actual situation, which is not specifically limited here.

202. Acquire the temperature of the current compartment, and if the temperature reaches a first preset temperature, turn off the static magnetic field and turn on the alternating magnetic field.

After the static magnetic field operates at the first magnetic field strength for a period of time, the temperature of the current compartment is obtained, and when the temperature reaches the first preset temperature, the static magnetic field is turned off.

It should be noted that the operation time of the static magnetic field is related to the temperature of the compartment. For example, if the meat block is set as soft frozen meat and the target temperature of the compartment is -3°C, the static magnetic field needs to run to the compartment Stop when the temperature is the first preset temperature. For example, when the first preset temperature is -5°C, the time for the static magnetic field to run is the time when the current temperature of the compartment rises to -5°C.

It can be understood that the setting of the first preset temperature is related to the target temperature of the compartment, and the specific needs are set according to actual applications, which is not specifically limited here.

After the static magnetic field is turned off, the alternating magnetic field is turned on. In some embodiments, the magnetic field strength for controlling the operation of the alternating magnetic field is between 0 mt and 10 mt, and the frequency is between 0 Hz and 50 Hz. The specific magnetic field strength of the alternating magnetic field needs to be set according to actual needs, which is not specifically limited here.

In the embodiment of the present application, when the state of frozen meat is converted into the state of soft frozen meat, the static magnetic field is operated for a preset time and then the alternating magnetic field is operated. However, after 48 hours of supercooling, the meat will continue to freeze. At this time, the alternating magnetic field is turned on to continue to inhibit the nucleation of ice crystals, so that the meat will not freeze for 7 days. The ice crystals are dissolved by magnetic field oscillation, thawed slowly, and the growth of microorganisms can also be inhibited during the thawing process to achieve safe thawing of meat pieces.

Please continue to refer to FIG. 3 , which is a schematic flowchart of controlling the magnetic field module to operate in the second mode in the fresh-keeping method shown in FIG. 1 .

301. Acquire the temperature of the current compartment, and if the temperature reaches a second preset temperature, control the magnetic field module to operate in a static magnetic field mode.

When the meat block is put into the compartment, the static magnetic field is temporarily turned off, the temperature of the current compartment needs to be obtained, and the static magnetic field starts to operate only when the compartment temperature is the second preset temperature. Because the static magnetic field has a certain amount of heat dissipation, it is not conducive to temperature conduction and cooling. Therefore, the static magnetic field is not turned on at the beginning. When the temperature of the food gradually decreases and begins to enter the ice crystal belt, the static magnetic field effect inhibits the nucleation of ice crystals and realizes the phenomenon of non-freezing of supercooled meat.

Exemplarily, if the target temperature of the compartment is -3° C. when the meat block is set as soft frozen meat, the static magnetic field needs to start running when the temperature of the compartment reaches a second preset temperature, for example, the second preset temperature. is 0 °C, which is beneficial to the reduction of the compartment temperature.

In some embodiments, the static magnetic field is controlled to operate at the second magnetic field strength in a range between 0 mt and 10 mt. The specific magnetic field strength needs to be set according to the actual situation, and no specific limitation is made here.

302. Obtain the temperature of the current compartment again, and if the temperature reaches a third preset temperature, turn off the static magnetic field and turn on the alternating magnetic field, and the second preset temperature is greater than the third preset temperature.

When the static magnetic field runs for a period of time, that is, when the current temperature of the current compartment will reach the third preset temperature, the static magnetic field is turned off and the alternating magnetic field is turned on. Wherein, the running time of the static magnetic field is the time for the compartment to cool down from the second preset temperature to the third preset time.

Exemplarily, when the temperature of the compartment reaches a second preset temperature, for example, 0°C, the static magnetic field starts to run, and when the temperature of the compartment reaches a third preset temperature, for example, -3°C, the static magnetic field is turned off and the alternating current is turned on. changing magnetic field.

In some embodiments, when the alternating magnetic field is turned on, the magnetic field strength for controlling the operation of the alternating magnetic field is between 0 mt and 10 mt, and the frequency is between 0 Hz and 50 Hz. The specific magnetic field strength of the alternating magnetic field needs to be set according to actual needs, which is not specifically limited here.

In the embodiment of the present application, when the state of fresh meat is converted into the state of soft frozen meat, the static magnetic field is temporarily turned off, and when the temperature of the compartment is lowered, the alternating magnetic field is operated by the static magnetic field for a preset time, and the static magnetic field is turned on temporarily. Avoid the situation where the static magnetic field is turned on and has heat dissipation, and then the magnetic field released by the static magnetic field suppresses the nucleation of ice crystals so that the supercooled meat is not frozen, but the meat will continue to freeze after 48 hours of supercooling. Inhibit the nucleation of ice crystals, so that the meat can be frozen for 7 days. The growth of meat microorganisms is inhibited by the magnetic field, and the preservation period of storage is prolonged.

In some other embodiments, after the meat block is stored, the alternating magnetic field is turned on, the ice crystal size of the meat block is measured at first preset time intervals, and the strength of the alternating magnetic field is adjusted according to the ice crystal size. Among them, the ice crystal size of the meat is positively correlated with the strength of the alternating magnetic field. By measuring the size of the ice crystals every first preset time, and then adjusting the strength of the alternating magnetic field, it can prevent the ice crystals from growing and aggravating the loss of juice after the meat is stored for a long time. Staleness, poor taste, and loss of nutrients.

Please continue to refer to FIG. 4 , FIG. 4 is a second schematic flowchart of the fresh-keeping method for meat pieces provided by the embodiment of the present application.

401. When the compartment is in the chilling mode, detect whether there are ice crystals in the meat.

When the compartment is in the cooling mode, the meat is photographed through the camera, and the captured image is sent to the controller, and the controller detects whether ice crystals appear in the meat according to the image.

It should be noted that, when the compartment is in the chilled-fresh mode, the compartment may be a refrigerating compartment for chilling fresh food, or the compartment may be a changing greenhouse, and the current compartment is in the chilled-fresh mode.

402. If it is detected that the meat block does not have ice crystals, determine that the storage state of the compartment is the preservation mode, and control the magnetic field module to operate in the third mode.

If it is detected that there is no ice crystal in the meat, it is determined that the current state of the meat is fresh meat, then the storage state of the meat is the fresh-keeping mode, and according to the storage state of the meat is the fresh-keeping mode, and then the magnetic field module can be controlled to The third mode operates.

The controlling the magnetic field module to operate in the third mode includes: after controlling the static magnetic field to operate at a third magnetic field strength for a second preset time, controlling the static magnetic field to operate at a fourth magnetic field strength, wherein the third magnetic field strength is smaller than the fourth magnetic field strength.

In some embodiments, the range of controlling the static magnetic field to operate at the third magnetic field strength is between 0 mt and 5 mt, and the range of controlling the static magnetic field to operate at the fourth magnetic field strength is between 5 mt and 10 mt. The specific magnetic field strength of the static magnetic field needs to be set according to actual needs, which is not specifically limited here.

It should be noted that the second preset time may be set according to actual conditions, and for example, the second preset time may be 48 hours, 50 hours, and so on.

403. If it is detected that there is ice crystals in the meat, it is determined that the cooling mode of the compartment is wrong, and the operation error is prompted, and the control magnetic field is not turned on.

If it is detected that there are ice crystals in the meat, it is determined that the cooling mode of the compartment is wrong, and the user is prompted to run wrong, and the control magnetic field is not turned on.

Please continue to refer to FIG. 5 to FIG. 6 , FIG. 5 is a schematic diagram of the first structure of the refrigerator provided by the embodiment of the application, FIG. 6 is a cross-sectional view of the refrigerator shown in FIG. 5 along the direction A-A, and FIG. 7 is the refrigerator provided by the embodiment of the application. Schematic diagram of the second structure. Embodiments of the present application further provide a refrigerator 100, a compartment 10, a camera 60, a magnetic field module 30, and a controller 20, wherein the compartment 10 includes a drawer 120 and a top 110 disposed opposite to each other, and the top 110 is provided with an air outlet. The camera 60 is disposed on the side of the top 110 facing the drawer 120, and is used to detect whether ice crystals exist in the meat. The magnetic field module 30 is disposed on the side of the drawer 120 away from the top 110, and the magnetic field module 30 is used for releasing the magnetic field to preserve the meat pieces; the controller 20 is electrically connected with the camera 60 and the magnetic field module 30, and the controller 20 is configured to: according to the meat The current state of the block determines the storage state of the meat block; if the meat block has ice crystals, it is determined that the storage state of the compartment is converted from the frozen meat state to the soft frozen meat state, and the magnetic field module 30 is controlled to operate in the first mode; If there is no ice crystal, it is determined that the storage state of the compartment is transformed from the fresh meat state to the soft frozen meat state, and the magnetic field module 30 is controlled to operate in the second mode. The individualized storage of the meat pieces can be realized through the camera 60, the magnetic field module 30 and the controller 20, so that the magnetic field released by the magnetic field module 30 follows the storage state of the meat pieces to run, so as to ensure the soft freezing state of the meat pieces without affecting the The taste and nutrition of meat.

The refrigerator 100 further includes a temperature sensor 50, which is electrically connected to the controller 20. The temperature sensor 50 is disposed on the opposite side of the top 110 and the drawer 120 for detecting the temperature of the compartment.

The magnetic field module 30 includes a static magnetic field and an alternating magnetic field.

Wherein, when the controller 20 controls the magnetic field module 30 to operate in the first mode, after the controller 20 controls the static magnetic field to operate at the first magnetic field strength for a first preset time, the temperature sensor 50 acquires the temperature of the current compartment and sends it to the controller 20. If the temperature reaches the first preset temperature, the controller 20 turns off the static magnetic field and turns on the alternating magnetic field.

When the controller 20 controls the magnetic field module 30 to operate in the second mode, the temperature sensor 50 acquires the temperature of the current compartment and sends it to the controller 20. If the temperature reaches the second preset temperature, the controller 20 controls the static magnetic field to operate in the second mode. Magnetic field strength operates. After the static magnetic field has been running for a period of time, the temperature of the current compartment is obtained again. If the temperature reaches a third preset temperature, the controller 20 turns off the static magnetic field and turns on the alternating magnetic field, wherein the second preset temperature is greater than the third preset temperature. Three preset temperatures.

When the compartment is in the cooling mode, the camera 60 captures the image of the meat, and sends the image to the controller 20, and the controller 20 detects whether the meat has ice crystals; if the controller 20 detects that the meat does not have ice crystals, Then, it is determined that the storage state of the meat block is the fresh-keeping mode, and the magnetic field module 30 is controlled to operate in the third mode. If the controller 20 detects that there are ice crystals in the meat, it determines that the cooling mode of the compartment is wrong, and prompts an operation error, and the control magnetic field is not turned on.

When the controller 20 controls the magnetic field module 30 to operate in the third mode, the controller 20 controls the static magnetic field to operate at the fourth magnetic field strength after the second preset time with the third magnetic field strength, wherein the third magnetic field strength is smaller than the fourth magnetic field strength Magnetic field strength.

The specific operations of the static magnetic field and the alternating magnetic field can be found in the above description, which will not be repeated here.

In some embodiments, the top 110 is provided with a temperature-controlled cold storage box 40 for keeping the temperature of the compartment 10 uniform.

In some embodiments, the top 110 is designed for the interlayer 130 , and air outlets are provided at four corners of the interlayer 130 .

The fresh-keeping method and refrigerator for meat pieces provided in the embodiments of the present application have been described in detail above. The principles and implementations of the present application are described herein by using specific examples, and the descriptions of the above embodiments are only used to help the understanding of the present application. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific embodiments and application scope. To sum up, the contents of this specification should not be construed as limitations on the present application.

Claims (10)

1. A fresh-keeping method of meat blocks is applied to a refrigerator, the refrigerator comprises a compartment, and the fresh-keeping method is characterized by comprising the following steps:

detecting whether ice crystals exist in the meat blocks when the compartment is in the ice fresh mode;

if ice crystals are detected in the meat pieces, converting the storage state of the compartment from a frozen meat state to a soft frozen meat state, and controlling the magnetic field module to operate in a first mode;

if the meat piece is detected to be free of ice crystals, the storage state of the compartment is converted from a fresh meat state to a soft frozen meat state, and the magnetic field module is controlled to operate in a second mode, wherein the second mode is different from the first mode.

2. The preservation method according to claim 1, wherein the controlling the magnetic field module to operate in the first mode comprises:

controlling the magnetic field module to operate in a static magnetic field mode;

and acquiring the temperature of the front compartment, and if the temperature reaches a first preset temperature, closing the static magnetic field and opening the alternating magnetic field.

3. The preservation method according to claim 1, wherein said controlling the magnetic field module to operate in the second mode comprises:

acquiring the temperature of the current compartment, and controlling the magnetic field module to operate in a static magnetic field mode if the temperature reaches a second preset temperature;

and obtaining the temperature of the current compartment again, if the temperature reaches a third preset temperature, closing the static magnetic field, and opening the alternating magnetic field, wherein the second preset temperature is higher than the third preset temperature.

4. A freshness retaining method according to claim 2 or 3, wherein after the static magnetic field is turned off and the alternating magnetic field is turned on, the freshness retaining method comprises:

measuring the ice crystal size of the meat pieces every first preset time interval;

adjusting the intensity of the alternating magnetic field according to the ice crystal size, wherein the ice crystal size of the meat block is positively correlated with the intensity of the alternating magnetic field.

5. The freshness keeping method according to claim 2, wherein the static magnetic field is controlled to operate at a magnetic field intensity ranging from 50mt to 100mt, the alternating magnetic field is controlled to operate at a magnetic field intensity ranging from 0mt to 10mt, and the frequency is controlled to range from 0HZ to 50 HZ.

6. The preservation method according to claim 1, further comprising:

detecting whether ice crystals exist in the meat blocks when the compartment is in a cold and fresh mode;

if no ice crystal exists in the meat blocks, determining that the storage state of the compartment is a fresh-keeping mode, and controlling the magnetic field module to operate in a third mode;

and if the ice crystals exist in the meat blocks, determining that the cold and fresh mode of the compartment is wrong, prompting an operation error, and controlling the magnetic field not to be started.

7. The preservation method according to claim 6, wherein the controlling the magnetic field module to operate in the third mode comprises:

and controlling the static magnetic field to operate at a second magnetic field intensity after operating at a first magnetic field intensity for a second preset time, wherein the first magnetic field intensity is smaller than the second magnetic field intensity.

8. A refrigerator, characterized by comprising:

the compartment comprises a drawer and a top which are oppositely arranged, and the top is provided with an air outlet;

the camera is arranged on one side, facing the drawer, of the top and is used for detecting whether ice crystals exist in the meat blocks;

the magnetic field module is arranged on one side of the drawer facing the top and used for releasing a magnetic field to keep the meat fresh;

a controller in electrical connection with the camera and the magnetic field module, the controller configured to: if ice crystals are detected in the meat pieces, converting the storage state of the compartment from a frozen meat state to a soft frozen meat state, and controlling the magnetic field module to operate in a first mode;

if it is detected that ice crystals are not present in the piece of meat, the storage state of the compartment is transformed from a fresh meat state to a soft frozen meat state, and the magnetic field module is controlled to operate in a second mode, different from the first mode.

9. The refrigerator of claim 8, further comprising a temperature sensor electrically connected to the controller, the temperature sensor being disposed at a side of the top opposite to the drawer for detecting a temperature of the compartment;

wherein the controller controls the magnetic field module to operate in the static magnetic field mode when the controller controls the magnetic field module to operate in the first mode;

the temperature sensor acquires the temperature of the current compartment and sends the temperature to the controller, and if the temperature reaches a first preset temperature, the controller closes the static magnetic field and opens the alternating magnetic field.

10. The refrigerator as claimed in claim 9, wherein the top is provided with a constant temperature cool storage box for maintaining the temperature of the compartment to be uniform.

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