Refrigerator for tender-freezing and refrigeration of meat, and meat tender-freezing method

Abstract

A refrigerator for tender-freezing and refrigeration of meat, and a meat tender-freezing method. The refrigerator for tender-freezing and refrigeration of meat has a tender-freezing working mode, and comprises: a tender-freezing component (1), comprising a refrigeration storage compartment and a cold conduction plate (13) dividing the refrigeration storage compartment into an air cooling chamber (11) and a storage chamber (12) which is used for hermetically storing meat in the tender-freezing working mode, wherein the air cooling chamber (11) and the storage chamber (12) are located on two opposite sides of the cold conduction plate (13); a refrigeration component used for providing cooling air in the tender-freezing working mode; and an air supply component used for receiving in the tender-freezing working mode the cooling air provided by the refrigeration component, and conveying the cooling air to the air cooling chamber (11) so as to perform convective heat exchange with the cold conduction plate (13), wherein in the tender-freezing working mode, the cold conduction plate (13) is cooled by the cooling air and then exchanges heat with the meat in the storage chamber (12) by means of the air in the closed storage chamber (12), so that the meat is supercooled.

Description

Meat ingredient tender freezing refrigeration refrigerator and meat ingredient tender freezing method

[0001] Related applications

[0002] This application is based on and claims priority to a Chinese patent application with application number 202410088571.9, application date January 22, 2024, and invention name “Meat ingredient tender-freezing refrigeration refrigerator and meat ingredient tender-freezing method”. The disclosed content of the Chinese patent application is hereby introduced as a whole into this application. Technical Field

[0003] The present disclosure relates to the technical field of refrigeration systems, and in particular to a meat tenderizing refrigeration refrigerator and a meat tenderizing method. Background Art

[0004] In order to improve the preservation effect of meat, the inventors have known technologies that use supercooling to freeze meat. Supercooling of meat and other ingredients refers to the process of rapidly dropping the temperature of the ingredients and breaking through the maximum ice crystal zone temperature of -1°C to -5°C when freezing them, thereby quickly freezing the ingredients, reducing damage to the ingredients' cells, and improving the preservation of meat and other ingredients. Currently, refrigerators with meat preservation functions on the market are mainly divided into air-cooled structures or direct-cooled structures. Among them, although the air-cooled preservation solution has a faster cooling rate, it has the problem of easily drying and discoloring the meat during the preservation process, increasing its juice loss rate, and is not easy to preserve for a long time. In addition, the air-cooled preservation solution has uneven air supply and heat exchange, which easily causes large temperature fluctuations during the preservation and refrigeration process, and makes it difficult to control the supercooling degree of meat. Conventional direct-cooling preservation solutions can reduce the juice loss rate of meat during storage, but due to their slow cooling rate and long direct freezing time, the meat may not be frozen in a supercooled state, resulting in uneven meat preservation effects.

[0005] Summary of the Invention

[0006] The purpose of the present disclosure is to provide a meat tender-freezing refrigeration refrigerator with a tender-freezing working mode that can solve at least one of the above-mentioned technical problems.

[0007] The first aspect of the present disclosure discloses a meat tender-freezing refrigeration refrigerator, which has a tender-freezing working mode and includes:

[0008] Tender frozen components, including:

[0009] refrigeration storage cavity;

[0010] A cooling plate divides the refrigeration storage cavity into an air-cooled chamber located on opposite sides of the cooling plate and a storage chamber for airtightly storing meat ingredients in a tender-freeze working mode;

[0011] Refrigeration component, used for providing cooling air in the tender freezing working mode;

[0012] The air supply component is used to receive the cooling air provided by the refrigeration component and transport it to the air-cooling chamber in the tender-freeze working mode for convection heat exchange with the cold conduction plate. In the tender-freeze working mode, the cold conduction plate is cooled by the cooling air and then exchanges heat with the meat ingredients in the storage chamber through the air in the closed storage chamber to supercool the meat ingredients.

[0013] In some embodiments, the ratio of the surface roughness of the cooling plate and the surface of the cooling air convection heat exchange to the distance between the cooling plate and the top wall of the cooling chamber is less than or equal to 10 -8 .

[0014] In some embodiments, along the flow direction of the cooling air, the length of the surface of the cooling plate 13 for convective heat exchange with the cooling air is less than umin·(δmax / 4.64) 2 / v1, and the length of the surface of the cooling plate and the cooling air convection heat exchange is greater than 2·10 5 v1 / umin, where umin is the lowest wind speed of the cooling chamber in the tender-freeze mode, v1 is the kinematic viscosity of the air when the temperature is the highest set temperature of the cooling chamber, and δmax is the maximum set value of the thermal boundary layer thickness.

[0015] In some embodiments, δmax is 0.03136 cm.

[0016] In some embodiments, the cooling plate is an aluminum cooling plate.

[0017] In some embodiments, the distance between the cold conducting plate and the bottom wall of the storage chamber is less than ((v 2 10 8 ) / (Pr·g·β·ΔT)) 1 / 3 , where g is the acceleration of gravity, β is the volume expansion coefficient of the air in the storage chamber at a temperature of Tmax, Pr is the Prandtl number of the air in the storage chamber at a temperature of Tmax, v is the kinematic viscosity of the air in the storage chamber at a temperature of Tmax, ΔT is the sum of the absolute value of the initial temperature set for the storage chamber in the tender-freeze working mode and the absolute value of the rated maximum temperature of the meat in the tender-freeze working mode, and Tmax is the maximum set temperature of the air in the storage chamber during the tender-freeze working mode.

[0018] In some embodiments, it also includes a temperature sensor for detecting the room temperature of the storage chamber and a control device connected to the refrigeration component and the air supply component by signal, and the control device is configured to control the operation of the refrigeration component and the air supply component according to the detection result of the temperature sensor.

[0019] A second aspect of the present disclosure discloses a method for tenderizing meat ingredients using any of the meat ingredient tenderizing refrigeration refrigerators, comprising:

[0020] Turning on the tender-freeze working mode of the meat tender-freeze refrigeration refrigerator;

[0021] placing the meat ingredients in the storage chamber;

[0022] The storage chamber is sealed.

[0023] In some embodiments, the tender-freeze working mode includes: before placing the meat ingredients in the storage chamber, using the refrigeration component to provide cooling air, and using the air supply component to transport the cooling air to the air-cooling chamber for convection heat exchange with the cold conduction plate to make the temperature of the storage chamber reach the initial temperature set for the storage chamber in the tender-freeze working mode.

[0024] In some embodiments, the tender-freeze working mode further includes: starting timing after the storage chamber is sealed, maintaining the room temperature in the storage chamber at the initial temperature t1 set in the tender-freeze working mode storage chamber, then lowering the room temperature in the storage chamber to a second set temperature T2, maintaining the room temperature in the storage chamber at the second set temperature t2 time after the room temperature in the storage chamber drops to T2, then lowering the room temperature in the storage chamber to a third set temperature T3, maintaining the room temperature in the storage chamber at the third set temperature t3 time after the room temperature in the storage chamber drops to T3, then lowering the room temperature in the storage chamber to The fourth set temperature is T4. After the room temperature in the storage chamber drops to T4, the room temperature in the storage chamber is maintained at the fourth set temperature for t4 time, and then the room temperature in the storage chamber is dropped to the fifth set temperature T5. After the room temperature in the storage chamber drops to T5, the room temperature in the storage chamber is maintained at the fifth set temperature for t5 time, and then the room temperature in the storage chamber is dropped to the sixth set temperature T6. After the room temperature in the storage chamber drops to T6, the room temperature in the storage chamber is maintained at the sixth set temperature for t6 time, and then the room temperature in the storage chamber is increased to the seventh set temperature T7 and maintained at the seventh set temperature T7.

[0025] In some embodiments, the initial temperature, T2, T3, T4, T5, T6 and T7 of the storage chamber in the tender-freeze working mode are set to -3°C, -4°C, -5°C, -6°C, -7°C, -18°C and -6°C, respectively, wherein t1, t2, t3, t4, t5 and t6 are 2 hours, 1 hour, 2 hours, 2 hours, 4 hours and 3 hours, respectively.

[0026] In some embodiments, the refrigeration component includes a refrigeration cycle component and a fan, and the refrigeration cycle component includes a compressor; the tender freezing working mode also includes: real-time detection of the room temperature in the storage chamber, when the detected value of the room temperature in the storage chamber is not higher than the sum of the temperature difference of the set temperature that needs to be maintained and a first threshold, and when the room temperature in the storage chamber needs to be increased, the air supply to the air-cooled chamber and the compressor are turned off; when the detected value of the room temperature in the storage chamber is higher than the sum of the temperature difference of the set temperature that needs to be maintained and the first threshold, air is supplied to the air-cooled chamber and the compressor is turned on.

[0027] In some embodiments, when the detected value of the room temperature in the storage chamber is higher than the sum of the temperature difference of the set temperature currently required to be maintained and the first threshold value, and the set temperature currently required to be maintained is the initial temperature set for the storage chamber in the tender-freeze working mode, T2, T3, T4 or T5, the wind speed of the cooling air sent into the air-cooling chamber is adjusted to the lowest gear wind speed umin and the power of the compressor is adjusted to the lowest gear power; when the detected value of the room temperature in the storage chamber is higher than the sum of the temperature difference of the set temperature currently required to be maintained and the first threshold value, and the set temperature currently required to be maintained is T6 or T7, the wind speed of the cooling air sent into the air-cooling chamber is adjusted to a high gear wind speed greater than the lowest gear wind speed umin and the power of the compressor is adjusted to a high gear power greater than the lowest gear power.

[0028] The meat ingredient tender-freezing refrigeration refrigerator provided by the present invention realizes supercooling of the meat ingredients placed in the storage chamber through the tender-freezing component and the air supply component with an air-cooling chamber, a cold guide plate and a storage chamber, and can form a composite structure of air cooling and direct cooling to perform composite cooling of the meat ingredients by air cooling and direct cooling, which can not only realize rapid cooling of meat food, but also reduce the drying, discoloration and juice loss of the meat ingredients, thereby realizing tender-freezing and preservation of the meat ingredients.

[0029] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of this application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0031] FIG1 is a schematic diagram showing the structural principle of a meat tenderizing and freezing refrigerator according to an embodiment of the present invention;

[0032] FIG2 is a schematic diagram illustrating the principle of the convection heat transfer process in the air-cooling chamber of the meat tender-frozen refrigeration refrigerator according to an embodiment of the present invention;

[0033] FIG3 is a schematic cross-sectional view of a meat tenderizing and freezing refrigerator according to another embodiment of the present invention;

[0034] FIG4 is a schematic cross-sectional view of a meat tenderizing and freezing refrigerator according to another embodiment of the present invention;

[0035] FIG5 is a schematic diagram of the set temperature of the storage chamber in the tender-freeze working mode of the meat food tender-freeze refrigeration refrigerator according to another embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, rather than as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0038] In the description of the present disclosure, it should be understood that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0039] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] As shown in FIG1 , FIG3 and FIG4 , the meat ingredient tender-freezing refrigeration refrigerator of this embodiment has a tender-freezing working mode, and the meat ingredient tender-freezing refrigeration refrigerator includes a tender-freezing component 1 , a refrigeration component and an air supply component.

[0042] The tender-freezing component 1 includes a refrigerated storage cavity and a cold conduction plate 13. The cold conduction plate 13 is a good heat conductor structure, including an aluminum plate, a copper plate, etc. As shown in the figure, the cold conduction plate 13 divides the refrigerated storage cavity into an air-cooled chamber 11 located on opposite sides of the cold conduction plate 13 and a storage chamber 12 for airtightly storing meat ingredients in the tender-freezing working mode. The outer ring of the air-cooled chamber is provided with a temperature-insulating device 14, such as a temperature-insulating foam. By opening the door of the storage chamber or as shown in Figures 3 and 4, by pulling out the drawer from the storage chamber 12 to open the storage chamber and placing the meat ingredients 100 into the storage chamber, and then closing the storage chamber by returning the drawer, etc., in the tender-freezing working mode, the storage chamber space is closed and the air in the storage chamber can remain relatively still.

[0043] The refrigeration component is used to provide cooling air in the tender-freeze working mode. In some embodiments, the refrigeration component includes a refrigeration cycle component and a fan. The refrigeration cycle component includes an evaporator, a compressor, an expansion valve and a radiator. The fan blows air to the evaporator to form cooling air or draws air from the evaporator to form cooling air.

[0044] The air supply component is used to receive the cooling air provided by the refrigeration component in the tender-freeze working mode and transport it to the air-cooling chamber 11 for convection heat exchange with the cold guide plate 13. In the tender-freeze working mode, the cold guide plate 13 cooled by the cooling air exchanges heat with the meat ingredients in the storage chamber 12 through the air in the closed storage chamber 12 to supercool the meat ingredients. The air supply component includes an air supply duct. In the tender-freeze working mode, the air supply duct receives the cooling air provided by the refrigeration component and transports it to the air-cooling chamber, forming convection heat exchange with the cold guide plate, which can quickly cool the cold guide plate. The cold guide plate with a good heat conductor structure can quickly directly cool the meat ingredients through the air in the storage chamber 12, thereby realizing a composite freezing method of air cooling and direct cooling. When the meat ingredients are supercooled and frozen, the meat ingredients can be quickly supercooled to preserve the meat ingredients for tender freezing. At the same time, the cold guide plate can also quickly make the temperature uniform, further improving the uniform supercooling and freezing effect of the meat ingredients.

[0045] The meat tender-freezing refrigerator of this embodiment utilizes a tender-freezing component 1 and an air supply component, each comprising an air-cooling chamber 11, a cold guide plate 13, and a storage chamber 12, to supercool the meat placed in the storage chamber 12. This allows for a composite structure combining air cooling and direct cooling to cool the meat, thereby rapidly cooling the meat while minimizing drying, discoloration, and juice loss, thereby maintaining the freshness of the meat. The meat tender-freezing refrigerator of this embodiment is not limited to tender-freezing meat, but can also be used to tender-freeze other fruits and vegetables that can be supercooled.

[0046] In some embodiments, in the tender-freeze working mode, when the cooling air and the cooling plate are subjected to convective heat exchange, the flow of the cooling air on the cooling plate in the cooling chamber is in a turbulent state. At the same time, as shown in the figure, the ratio of the surface roughness K of the surface of the cooling plate 13 for convective heat exchange with the cooling air to the distance d between the cooling plate 13 and the top wall of the cooling chamber 11 is less than or equal to 10 -8 That is, K / d is less than or equal to 10 -8 In this embodiment, when the guide plate 13 performs convection heat exchange with the turbulent cooling air, a smooth turbulent flow area can be formed, and the heat exchange effect between the cooling air and the guide plate is outstanding, and the cooling air can quickly cool the guide plate.

[0047] In some embodiments, along the flow direction of the cooling air, the length X of the surface of the cooling plate 13 for convective heat exchange with the cooling air is less than umin·(δmax / 4.64) 2 / v1, and the length X of the surface of the cooling plate and the cooling air convection heat exchange is greater than 2·10 5·v1 / umin, wherein umin is the lowest gear wind speed of the air cooling chamber in the tender-freeze working mode, v1 is the kinematic viscosity of the air when the temperature is the highest set temperature of the air cooling chamber, and δmax is the maximum set value of the thickness of the thermal boundary layer δt. In this application, the symbol "·" represents multiplication. The air cooling chamber is used to cool the cold guide plate. When performing the tender-freeze work, the meat ingredients in the storage chamber need to be frozen. The highest set temperature of the cold guide chamber in the tender-freeze working mode can be 0°C. The wind speed of the cold guide chamber of the meat ingredient tender-freeze refrigerator of this embodiment has multiple gears, among which the wind speed is the smallest when the lowest gear wind speed is running. The determination of the lowest gear wind speed can be determined based on experience or based on the wind speed of the variable frequency fan in the lowest power working state to maintain stable operation. For example, umin can be determined to be 0.25m / s, and the highest gear wind speed is 1m / s. The length X of the surface of the cold guide plate and the cooling air convection heat exchange in this embodiment is greater than 2·10 5 v1 / umin, when the cooling air flows on the cooling plate at a speed greater than umin, the Reynolds number of at least some sections is greater than 2.10 5 , ensuring that in the tender-freeze mode, the cooling air can flow across the laminar boundary layer during the convective heat exchange between the cooling air and the cooling plate, creating a turbulent state. In the turbulent region, the cooling air and the cooling plate have good convective heat exchange. The length X of the surface of the cooling plate 13 in this embodiment for convective heat exchange with the cooling air is less than umin·(δmax / 4.64). 2 / v1, which can ensure that in the tender-freeze operating mode, when the cooling air flows through the turbulent section of the cooling plate at a speed of umin or higher during convective heat exchange between the cooling air and the cooling plate, the thickness of the thermal boundary layer is less than δmax, thereby ensuring further improved convective heat exchange between the cooling air and the cooling plate in the turbulent section. In some embodiments, δmax is 0.03136 cm, thereby controlling the thickness of the thermal boundary layer δt to be less than 0.03136 cm during convective heat exchange between the cooling air and the cooling plate at a speed of umin or higher during convective heat exchange between the cooling air and the cooling plate, thereby achieving a high convective heat exchange effect between the cooling air and the cooling plate.

[0048] In some embodiments, the cooling plate 13 is an aluminum uniform cooling plate. The aluminum uniform cooling plate can quickly transfer the low temperature of the air cooling chamber to the storage chamber for direct cooling of the meat ingredients. It can also evenly distribute the coldness on the aluminum cloud cooling plate, making the heat transfer to the storage chamber more uniform and stable.

[0049] In some embodiments, the distance L between the cold conducting plate 13 and the bottom wall of the storage chamber 12 is less than ((v 2 10 8 ) / (Pr·g·β·ΔT)) 1 / 3, where g is the acceleration due to gravity, β is the volume expansion coefficient of the air in storage chamber 12 at temperature Tmax, Pr is the Prandtl number of the air in storage chamber 12 at temperature Tmax, v is the kinematic viscosity of the air in storage chamber 12 at temperature Tmax, ΔT is the sum of the absolute value of the initial storage chamber temperature set in the tender-freeze mode and the absolute value of the rated maximum temperature of the meat in the tender-freeze mode, and Tmax is the maximum set temperature of the air in storage chamber 12 during the tender-freeze mode. The meat tender-freezing refrigerator of this embodiment also sets a rated maximum temperature for meat based on the power of the refrigerator, etc. Only meat ingredients below this temperature can be placed in the refrigerator for tender-freezing. For example, the rated maximum temperature for meat can be set to the normal room temperature of 20°C plus a temperature, such as 20°C, to set the rated maximum temperature for meat to 40°C. In the tender-freeze mode, multiple low temperatures are set for the storage chamber to cool the meat ingredients and quickly supercool them. The initial temperature set for the storage chamber in the tender-freeze mode is the starting temperature of the storage chamber when the tender-freeze mode starts. When the tender-freeze mode starts, the storage chamber is first adjusted to the initial temperature set for the storage chamber in the tender-freeze mode, and then the meat ingredients are placed in the tender-freeze mode for tender-freezing. In the embodiment shown in FIG5 , Tmax is -3°C, and the initial temperature set for the storage chamber in the tender-freeze mode is -3°C. In this embodiment, the distance L between the cooling plate 13 and the bottom wall of the storage chamber 12 is less than ((v 2 10 8 ) / (Pr·g·β·ΔT)) 1 / 3 During the entire process of the tender-freezing working mode, laminar steady-state heat exchange can be achieved between the air in the storage chamber as the heat exchange medium and the meat ingredients, which further reduces the air-drying effect of the meat ingredients, reduces the temperature kneading of the meat ingredients, makes the direct cooling of the meat ingredients in the storage chamber more stable and uniform, and improves the tender-freezing effect of the meat ingredients.

[0050] In some embodiments, the meat tenderizer refrigerator further includes a temperature sensor 15 for detecting the room temperature of the storage chamber 12 and a control device connected to the refrigeration component and the ventilation component. The control device is configured to control the operation of the refrigeration component and the ventilation component based on the detection results of the temperature sensor 15. For example, the control device can adjust the gear of the cooling air supplied to the cooling chamber, thereby adjusting the wind speed. This embodiment can more accurately and effectively adjust the operation of the refrigeration component and the ventilation component based on temperature detection.

[0051] In some embodiments, a method for tenderizing meat ingredients using the above-mentioned meat ingredient tenderizing refrigeration refrigerator is also disclosed, comprising:

[0052] Turn on the tender freezing mode of the meat tender freezing refrigerator;

[0053] Place the meat ingredients in the storage chamber 12;

[0054] The storage chamber 12 is sealed.

[0055] The meat ingredient tender-freezing refrigeration refrigerator of this embodiment realizes supercooling of the meat ingredients placed in the storage chamber 12 through the tender-freezing component 1 and the air supply component with the air-cooling chamber 11, the cold guide plate 13 and the storage chamber 12, and can form a composite structure of air cooling and direct cooling to perform composite cooling of air cooling and direct cooling on the meat ingredients, which can not only realize rapid cooling of meat food, but also reduce the drying, discoloration and juice loss of the meat ingredients, thereby realizing tender-freezing and preservation of the meat ingredients.

[0056] In some embodiments, the tender-freeze mode includes: prior to placing the meat ingredients in storage chamber 12, utilizing a refrigeration component to provide cooling air, utilizing an air supply component to deliver cooling air to air-cooled chamber 11 for convection heat exchange with cold guide plate 13, bringing the temperature of storage chamber 12 to a set initial temperature for the tender-freeze mode storage chamber. Setting a set initial temperature for the tender-freeze mode storage chamber allows the tender-freeze process of the meat ingredients to proceed in stages, first steadily cooling the meat ingredients to near zero degrees Celsius, then rapidly lowering the temperature of the meat ingredients through the maximum ice crystal zone temperature, achieving rapid supercooling, ensuring a sufficient supercooling effect, and further enhancing the tender-freeze preservation of the meat ingredients.

[0057] In some embodiments, the tender-freeze working mode further includes: starting the timing after the storage chamber 12 is sealed, maintaining the room temperature in the storage chamber 12 for the initial temperature t1 set in the tender-freeze working mode storage chamber, and then lowering the room temperature in the storage chamber 12 to the second set temperature T2, and after the room temperature in the storage chamber 12 drops to T2, maintaining the room temperature in the storage chamber 12 at the second set temperature t2 time, and then lowering the room temperature in the storage chamber 12 to the third set temperature T3, and after the room temperature in the storage chamber 12 drops to T3, maintaining the room temperature in the storage chamber 12 at the third set temperature t3 time, and then lowering the room temperature in the storage chamber 12 to the third set temperature T4. The fourth set temperature T4 is set. After the room temperature in the storage chamber 12 drops to T4, the room temperature in the storage chamber 12 is maintained at the fourth set temperature for a period of time t4. The room temperature in the storage chamber 12 is then dropped to a fifth set temperature T5. After the room temperature in the storage chamber 12 drops to T5, the room temperature in the storage chamber 12 is maintained at the fifth set temperature for a period of time t5. The room temperature in the storage chamber 12 is then dropped to a sixth set temperature T6. After the room temperature in the storage chamber 12 drops to T6, the room temperature in the storage chamber 12 is maintained at the sixth set temperature for a period of time t6. The room temperature in the storage chamber 12 is then raised to a seventh set temperature T7 and maintained at the seventh set temperature T7. In this embodiment, the setting of temperature T6 achieves rapid supercooling of the meat ingredients. In the tender-freeze mode, the initial temperature of the storage chamber, and the settings of temperatures T2, T3, T4, and T5 allow the temperature of the meat ingredients to drop steadily to near zero degrees Celsius, followed by rapid supercooling of the meat ingredients. The steady cooling of the meat ingredients before rapid supercooling reduces the impact of temperature fluctuations on the meat ingredients, improves the freshness preservation effect, and also helps to make the supercooling process of the meat ingredients faster, more accurate, and more effective.

[0058] In some embodiments, the initial temperature, T2, T3, T4, T5, T6 and T7 of the storage chamber in the tender-freeze working mode are set to -3°C, -4°C, -5°C, -6°C, -7°C, -18°C and -6°C, respectively, wherein t1, t2, t3, t4, t5 and t6 are 2 hours, 1 hour, 2 hours, 2 hours, 4 hours and 3 hours, respectively. In this embodiment, the initial temperature, T2, T3, T4, and T5 temperature settings of the storage chamber in the tender-freeze working mode allow the temperature of the meat ingredients to steadily drop to close to -1°C, close to the temperature range of the maximum ice crystal zone. This stage is a slow cooling zone, which can reduce the temperature difference with the meat through gradient heat exchange, and then quickly supercool the meat ingredients to increase the supercooling depth of the meat. The meat ingredients are cooled steadily before rapid supercooling, which reduces the impact of temperature fluctuations on the meat ingredients and improves the preservation effect. The rapid supercooling of the meat ingredients is achieved by setting the T6 temperature. By increasing the temperature stress, increasing the latent heat, and improving the heat exchange efficiency, the meat can quickly form fine ice crystals, reducing meat cell damage, and at the same time, it can also help to make the supercooling process of the meat ingredients faster, more accurate and effective.

[0059] In some embodiments, the refrigeration component includes a refrigeration cycle component and a fan, and the refrigeration cycle component includes a compressor; the tender freezing working mode also includes: real-time detection of the room temperature in the storage chamber 12, when the detection value of the room temperature in the storage chamber 12 is not higher than the sum of the temperature difference of the set temperature currently to be maintained and the first threshold value, and when the room temperature in the storage chamber 12 needs to be increased, the air supply to the air-cooling chamber 11 is turned off and the compressor is turned off; when the detection value of the room temperature in the storage chamber 12 is higher than the sum of the temperature difference of the set temperature currently to be maintained and the first threshold value, air is supplied to the air-cooling chamber 11 and the compressor is turned on.

[0060] In some embodiments, when the detected value of the room temperature in the storage chamber 12 is higher than the sum of the temperature difference of the set temperature currently required to be maintained and the first threshold value, and the set temperature currently required to be maintained is the initial temperature set for the storage chamber in the tender-freeze working mode, T2, T3, T4 or T5, the wind speed of the cooling air sent into the air-cooling chamber 11 is adjusted to the lowest gear wind speed umin and the power of the compressor is adjusted to the lowest gear power; when the detected value of the room temperature in the storage chamber 12 is higher than the sum of the temperature difference of the set temperature currently required to be maintained and the first threshold value, and the set temperature currently required to be maintained is T6 or T7, the wind speed of the cooling air sent into the air-cooling chamber 11 is adjusted to a high gear wind speed greater than the lowest gear wind speed umin and the power of the compressor is adjusted to a high gear power greater than the lowest gear power, and the high gear wind speed is a wind speed between the lowest gear wind speed and the highest gear wind speed.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solutions of the present invention. They should all be included in the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A refrigerating refrigerator for tender freezing of meat ingredients, wherein, It has a soft freezing working mode, including: A soft freezing component (1), including: A refrigerated storage chamber; A heat conduction plate (13) that divides the refrigerated storage chamber into an air-cooled chamber (11) and a storage chamber (12) located on opposite sides of the heat conduction plate (13) for storing meat ingredients in a sealed manner in the soft freezing working mode; A refrigeration component for providing cooling air in the soft freezing working mode; An air supply component for receiving the cooling air provided by the refrigeration component in the soft freezing working mode and delivering it to the air-cooled chamber (11) to conduct convective heat exchange with the heat conduction plate (13). In the soft freezing working mode, after the heat conduction plate (13) is cooled by the cooling air, it exchanges heat with the air in the sealed storage chamber (12) and the meat ingredients in the storage chamber (12) to supercool the meat ingredients.

2. The meat ingredient tender freezing refrigerator according to claim 1, wherein, The ratio of the surface roughness of the surface of the heat conduction plate (13) that convectively exchanges heat with the cooling air to the distance between the heat conduction plate (13) and the top wall of the air cooling chamber (11) is less than or equal to 10 -8 .

3. The meat ingredient tender freezing refrigerator according to claim 1 or 2, wherein, Along the flow direction of the cooling air, the length of the surface of the heat conduction plate (13) that convectively exchanges heat with the cooling air is less than umin·(δmax / 4.64) 2 / v1, and the length of the surface of the heat conduction plate (13) that convectively exchanges heat with the cooling air is greater than 2·10 5 ·v1 / umin, where umin is the minimum gear wind speed of the air-cooled chamber (11) in the soft-freezing working mode, v1 is the kinematic viscosity of air when the temperature of the air is the highest set temperature of the air-cooled chamber (11), and δmax is the maximum set value of the thermal boundary layer thickness.

4. The meat ingredient tender freezing refrigerator according to claim 3, wherein, δmax is 0.03136 cm.

5. The meat ingredient tender freezing refrigerator according to claim 1 or 2, wherein, The heat conduction plate (13) is an aluminum uniform heat conduction plate.

6. The meat ingredient tender freezing refrigerator according to claim 1 or 2, wherein, The distance between the heat conduction plate (13) and the bottom wall of the storage chamber (12) is less than ((v 2 ·10 8 ) / (P r ·g·β·ΔT)) 1 / 3 , where g is the acceleration due to gravity, β is the coefficient of volume expansion of the air in the storage chamber (12) at a temperature of Tmax, Pr is the Prandtl number of the air in the storage chamber (12) at a temperature of Tmax, v is the kinematic viscosity of the air in the storage chamber (12) at a temperature of Tmax, ΔT is the sum of the absolute value of the initial temperature set for the storage chamber in the fresh freezing working mode and the absolute value of the rated maximum temperature of the meat in the fresh freezing working mode, and Tmax is the highest set temperature of the air in the storage chamber (12) during the fresh freezing working mode.

7. The meat ingredient tender freezing refrigerator according to claim 1 or 2, wherein, It further includes a temperature sensor (15) for detecting the room temperature of the storage chamber (12) and a control device that is signal-connected to the refrigeration component and the air supply component. The control device is configured to control the operation of the refrigeration component and the air supply component according to the detection result of the temperature sensor (15).

8. A method for tender freezing of meat ingredients using the meat ingredient tender freezing refrigerator as described in any one of claims 1 to 7, wherein, Including: Turn on the soft freezing working mode of the meat ingredient soft freezing refrigerator; Place the meat ingredients in the storage chamber (12); Seal the storage chamber (12).

9. The method for tender freezing of meat ingredients according to claim 8, wherein, The soft freezing working mode includes: before placing the meat ingredients in the storage chamber (12), using the refrigeration component to provide cooling air, and using the air supply component to deliver the cooling air to the air-cooled chamber (11) to conduct convective heat exchange with the heat conduction plate (13) so that the temperature of the storage chamber (12) reaches the set initial temperature of the storage chamber in the soft freezing working mode.

10. The method for tender freezing of meat ingredients according to claim 9, wherein, The tender freezing working mode further includes: starting timing after closing the storage chamber (12), maintaining the room temperature in the storage chamber (12) at the initial temperature t1 set for the storage chamber in the tender freezing working mode for a period of time, then decreasing the room temperature in the storage chamber (12) to the second set temperature T2, maintaining the room temperature in the storage chamber (12) at the second set temperature t2 for a period of time after the room temperature in the storage chamber (12) drops to T2, then decreasing the room temperature in the storage chamber (12) to the third set temperature T3, maintaining the room temperature in the storage chamber (12) at the third set temperature t3 for a period of time after the room temperature in the storage chamber (12) drops to T3, then decreasing the room temperature in the storage chamber (12) to the fourth set temperature T4, maintaining the room temperature in the storage chamber (12) at the fourth set temperature t4 for a period of time after the room temperature in the storage chamber (12) drops to T4, then decreasing the room temperature in the storage chamber (12) to the fifth set temperature T5, maintaining the room temperature in the storage chamber (12) at the fifth set temperature t5 for a period of time after the room temperature in the storage chamber (12) drops to T5, then decreasing the room temperature in the storage chamber (12) to the sixth set temperature T6, maintaining the room temperature in the storage chamber (12) at the sixth set temperature t6 for a period of time after the room temperature in the storage chamber (12) drops to T6, and then increasing the room temperature in the storage chamber (12) to the seventh set temperature T7 and maintaining the seventh set temperature T7.

11. The method for tender freezing of meat ingredients according to claim 10, wherein, The initial temperature set for the storage chamber in the tender freezing working mode, T2, T3, T4, T5, T6 and T7 are -3°C, -4°C, -5°C, -6°C, -7°C, -18°C and -6°C respectively, where t1, t2, t3, t4, t5, t6 are 2 hours, 1 hour, 2 hours, 2 hours, 4 hours and 3 hours respectively.

12. The method for tender freezing of meat ingredients according to claim 10, wherein, The refrigeration component includes a refrigeration cycle assembly and a fan, and the refrigeration cycle assembly includes a compressor; the tender freezing working mode further includes: detecting the room temperature in the storage chamber (12) in real time, when the detected value of the room temperature in the storage chamber (12) is not higher than the sum of the temperature difference from the set temperature that needs to be maintained currently and the first threshold, and when the room temperature in the storage chamber (12) needs to rise, closing the air supply to the air-cooled chamber (11) and shutting down the compressor; when the detected value of the room temperature in the storage chamber (12) is higher than the sum of the temperature difference from the set temperature that needs to be maintained currently and the first threshold, supplying air to the air-cooled chamber (11) and starting the compressor.

13. The method for tender freezing of meat ingredients according to claim 12, wherein, When the detected temperature difference between the room temperature in the storage chamber (12) and the set temperature currently required to be maintained is higher than the sum of the first threshold value and the temperature difference, and the set temperature currently required to be maintained is the initial set temperature of the storage chamber in the soft freezing working mode, T2, T3, T4 or T5, the wind speed of the cooling air sent into the air-cooled chamber (11) is adjusted to the lowest gear wind speed umin and the power of the compressor is adjusted to the lowest gear power; when the detected temperature difference between the room temperature in the storage chamber (12) and the set temperature currently required to be maintained is higher than the sum of the first threshold value and the temperature difference, and the set temperature currently required to be maintained is T6 or T7, the wind speed of the cooling air sent into the air-cooled chamber (11) is adjusted to a high gear wind speed higher than the lowest gear wind speed umin and the power of the compressor is adjusted to a high gear power higher than the lowest gear power.

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