Magnetic field fresh-keeping refrigerator and refrigeration control method thereof

Abstract

The application provides a magnetic field fresh-keeping refrigerator and a refrigeration control method thereof. The magnetic field fresh-keeping refrigerator comprises a cabinet defining an internal storage compartment, a refrigeration air duct providing a refrigeration airflow to the storage compartment, a refrigeration system for forming the refrigeration airflow, and a magnetic field fresh-keeping device arranged in the storage compartment. The magnetic field fresh-keeping device is provided with an air inlet and an air return for communicating with the refrigeration air duct to air cool the magnetic field fresh-keeping space. The refrigeration control method comprises: judging whether the state of the magnetic field fresh-keeping space meets a preset quick refrigeration starting condition; if yes, performing quick refrigeration on the magnetic field fresh-keeping device until the state of the magnetic field fresh-keeping space meets a preset quick refrigeration ending condition; after completing the quick refrigeration on the magnetic field fresh-keeping device, performing one or more stages of a transition refrigeration process on the magnetic field fresh-keeping device; and after completing the transition refrigeration, controlling the refrigeration system to perform normal refrigeration on the magnetic field fresh-keeping device. The scheme realizes quick and stable refrigeration and temperature reduction of the magnetic field fresh-keeping device.

Description

Technical Field

[0001] This invention relates to refrigeration and freezing equipment, specifically providing a magnetic field preservation refrigerator and its refrigeration control method. Background Technology

[0002] Current research has found that magnetic fields can inhibit the growth of microorganisms and molds, extending the shelf life of food. Therefore, magnetic fields can be used to assist in food storage, thereby extending the shelf life of food.

[0003] To achieve optimal preservation, the magnetic field needs to be coordinated with the storage temperature. Actual testing shows that, under non-freezing conditions, the ideal storage temperature is between 5-8 degrees Celsius, with a relatively stable cooling rate to minimize temperature fluctuations. Furthermore, after the magnetic field preservation device is opened or new items are added, rapid cooling is necessary to bring the storage temperature down to the predetermined range.

[0004] However, in order to arrange the magnetic field components, the magnetic field preservation device has a more complex structure than ordinary storage devices. How to achieve rapid and stable cooling and temperature reduction of the magnetic field preservation device has become an urgent problem to be solved by existing technologies. Summary of the Invention

[0005] One objective of this invention is to provide a magnetic field preservation refrigerator that can quickly and stably cool down using a magnetic field preservation device.

[0006] A further objective of this invention is to make the temperature of the preservation space of the magnetic field preservation device uniform.

[0007] To achieve the above objectives, the present invention provides a refrigeration control method for a magnetic field preservation refrigerator. The magnetic field preservation refrigerator includes: a cabinet internally defining a storage compartment; a refrigeration duct providing refrigerated airflow to the storage compartment; a refrigeration system for forming the refrigerated airflow; and a magnetic field preservation device disposed within the storage compartment. The magnetic field preservation device has an air inlet and an air return outlet for connecting to the refrigeration duct, so as to introduce refrigerated airflow to cool its internal magnetic field preservation space. The refrigeration control method includes:

[0008] Determine whether the state of the magnetic field preservation space meets the preset rapid cooling start-up conditions;

[0009] If so, control the refrigeration system to rapidly cool the magnetic field preservation device until the state of the magnetic field preservation space meets the preset rapid cooling termination conditions.

[0010] After the refrigeration system completes the rapid cooling of the magnetic field preservation device, the refrigeration system is controlled to perform one or more stages of transitional cooling process on the magnetic field preservation device.

[0011] After the refrigeration system completes the transition cooling of the magnetic field preservation device, the refrigeration system is controlled to perform normal cooling on the magnetic field preservation device.

[0012] Optionally, the process of the refrigeration system rapidly cooling the magnetic field preservation device is configured such that the refrigeration system continuously provides cooling airflow to the magnetic field preservation device at a high cooling load.

[0013] Optionally, the magnetic field preservation device is provided with a surrounding air duct that starts from the air inlet, surrounds the preservation space and returns to the return air inlet; and a first temperature detection component installed in the surrounding air duct; and the step of determining whether the state of the magnetic field preservation space meets the preset rapid cooling start-up conditions includes: determining whether the first temperature value detected by the first temperature detection component is greater than or equal to the first temperature threshold; if so, determining that the state of the magnetic field preservation space meets the rapid cooling start-up conditions.

[0014] Optionally, the first temperature detection component is installed in the upstream section of the airflow in the surrounding air duct, and the magnetic field preservation device further includes: a second temperature detection component installed in the downstream section of the airflow in the surrounding air duct; the rapid cooling termination condition includes: the first temperature value is less than or equal to the second temperature threshold and / or the second temperature value detected by the second temperature detection component is less than or equal to the third temperature threshold, the second temperature threshold is less than the first temperature threshold, and the third temperature threshold is less than the second temperature threshold.

[0015] Optionally, the transitional refrigeration process includes multiple stages, and the steps for controlling the refrigeration system to perform multiple stages of transitional refrigeration on the magnetic field preservation device include:

[0016] In each stage, if the first temperature value is greater than or equal to the refrigeration start-up temperature threshold corresponding to that stage, the refrigeration system is controlled to start and provide refrigeration airflow to the magnetic field preservation device under normal refrigeration load conditions; if the first temperature value is less than the refrigeration shutdown temperature threshold corresponding to that stage, the refrigeration system is controlled to stop providing refrigeration airflow to the magnetic field preservation device.

[0017] After the number of times the refrigeration system stops supplying refrigeration airflow to the magnetic field preservation device exceeds a preset threshold, or after the second temperature value is less than or equal to the stage temperature threshold for that stage, the system enters the next stage of transitional refrigeration.

[0018] Optionally, as cooling proceeds, the cooling shutdown temperature threshold and cooling start temperature threshold in the subsequent transition cooling stage are respectively lower than the cooling shutdown temperature threshold and cooling start temperature threshold in the previous transition cooling stage; the stage temperature threshold in the subsequent transition cooling stage is lower than the temperature threshold in the previous transition cooling stage.

[0019] Optionally, during the final stage of transitional cooling of the magnetic field preservation device by the refrigeration system, if the number of times the refrigeration system stops supplying cooling airflow to the magnetic field preservation device exceeds a preset threshold, or if the second temperature value is less than or equal to the stage temperature threshold of the final stage, the step of controlling the refrigeration system to perform normal cooling of the magnetic field preservation device is executed.

[0020] Optionally, the cooling load and the magnitude of the cooling airflow of the refrigeration system under normal cooling load conditions are respectively less than the cooling load and the magnitude of the cooling airflow of the refrigeration system under high cooling load conditions.

[0021] According to another aspect of the present invention, a magnetic field preservation refrigerator is also provided, comprising: a cabinet defining a storage compartment inside; a cooling air duct providing cooling airflow to the storage compartment; a cooling system for generating the cooling airflow; a magnetic field preservation device disposed in the storage compartment and having an air inlet and an air outlet for connecting to the cooling air duct to introduce cooling airflow to cool the magnetic field preservation space inside; and a cooling controller including a memory and a processor, wherein the memory stores a machine-executable program, and when the machine-executable program is executed by the processor, it implements the cooling control method of the magnetic field preservation refrigerator according to any of the above embodiments.

[0022] Optionally, the magnetic field preservation device has an air inlet and an air return outlet for connecting the refrigeration air duct, and forms a surrounding air duct that starts from the air inlet, surrounds the preservation space, and returns to the air return outlet; and the magnetic field preservation refrigerator includes: a first temperature detection component, which is disposed in the upstream section of the airflow in the surrounding air duct, and the detected temperature value is recorded as a first temperature value; and a second temperature detection component, which is disposed in the downstream section of the airflow in the surrounding air duct, and the detected temperature value is recorded as a second temperature value.

[0023] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this invention, the magnetic field preservation device is arranged in the storage compartment of the magnetic field preservation refrigerator, utilizing the magnetic field to improve the quality of stored goods. When the state of the magnetic field preservation space meets the preset rapid cooling start-up conditions, the refrigeration system rapidly cools the magnetic field preservation device. When rapid cooling is required in the magnetic field preservation space, rapid cooling and temperature reduction are performed to meet the rapid cooling requirements after the magnetic field preservation device is opened or new stored goods are placed in. After the refrigeration system completes the rapid cooling of the magnetic field preservation device, it controls the refrigeration system to perform one or more stages of transitional cooling for the magnetic field preservation device. The transitional cooling process slows down the rate of temperature decrease after the rapid cooling technology, avoiding rapid temperature fluctuations. The solution of this invention avoids temperature fluctuations in the preservation space, combining the effects of temperature and magnetic field to improve the preservation effect of food in the preservation space.

[0024] Furthermore, the magnetic field preservation refrigerator and its refrigeration control method of the present invention utilize multiple temperature detection components as the basis for control, accurately obtain the temperature inside the magnetic field preservation device, and improve the accuracy of control.

[0025] Furthermore, the magnetic field preservation refrigerator and its refrigeration control method of the present invention have formulated corresponding control strategies and start-stop conditions for rapid refrigeration, transitional refrigeration and normal refrigeration, which effectively achieves the control objectives, ensures that the temperature of the preservation space is more uniform, and makes the quality of stored goods more balanced.

[0026] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar parts or components in different drawings; the drawings of the present invention are not necessarily drawn to scale.

[0028] In the attached image:

[0029] Figure 1 This is a schematic diagram of a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of a magnetic field preservation device in a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0031] Figure 3 yes Figure 2 A schematic diagram of another view of the magnetic field preservation device shown.

[0032] Figure 4 This is a side sectional view of a magnetic field preservation device in a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0033] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;

[0034] Figure 6 yes Figure 4 A magnified view of a section at point B in the middle;

[0035] Figure 7 This is a schematic diagram of the top section of the surrounding air duct of the magnetic field preservation device in a magnetic field preservation refrigerator according to an embodiment of the present invention.

[0036] Figure 8 This is an exploded view of the components of a magnetic field preservation device in a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the air guide component of the magnetic field preservation device in a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0038] Figure 10 This is a schematic diagram of the air duct of the magnetic field preservation device in a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0039] Figure 11 This is a system block diagram of the control components of a magnetic field preservation device in a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0040] Figure 12 A schematic diagram of a refrigeration control method for a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0041] Figure 13 A flowchart of an optional implementation of the refrigeration control method for a magnetic field preservation refrigerator according to an embodiment of the present invention. Detailed Implementation

[0042] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0043] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," "main," and "subsidiary" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] Figure 1 This is a schematic diagram of a magnetic field preservation refrigerator according to an embodiment of the present invention; the magnetic field preservation refrigerator 10 can be a refrigerator and includes: a cabinet 110, a door 120, and a refrigeration system (not shown in the figure). The cabinet 110 may define at least one front-opening storage compartment 130, and usually multiple compartments, such as a refrigerated storage compartment, a frozen storage compartment, a variable temperature storage compartment, etc. The specific number and function of the storage compartments 130 can be configured according to pre-defined needs.

[0046] The magnetic field preservation refrigerator 10 can use air-cooling to cool the storage compartment 130. Specifically, a refrigeration duct is provided within the cabinet 110 to provide cooling airflow to the storage compartment 130. The refrigeration system, used to generate the cooling airflow, may include an air duct system and a compression refrigeration system. The air duct system uses a fan 160 to deliver the cooling airflow, which has undergone heat exchange at the heat exchanger 150 (evaporator) of the compression refrigeration system, to the storage compartment 130 via an air outlet, and then returns to the air duct via a return air outlet 232. This achieves cooling. In some embodiments, a refrigeration duct 140 for providing cooling airflow is provided at the back of the storage compartment 130. The heat exchanger 150 can be disposed within the refrigeration duct 140 to exchange heat with the flowing airflow. A fan 160 is disposed within the refrigeration duct 140 to facilitate the formation of the aforementioned circulating cooling airflow.

[0047] There can be multiple storage compartments, and at least one of the multiple storage compartments is equipped with a magnetic field preservation device 20. Those skilled in the art can configure a refrigeration system and air duct for each storage compartment as needed. For example, a heat exchanger 150 can be configured for one storage compartment, or a heat exchanger 150 can be configured for two or more storage compartments.

[0048] Heat exchanger 150 (evaporator) is part of a compression refrigeration system, which utilizes the refrigerant in a compression phase change cycle through the compressor, condenser, evaporator, and throttling device to achieve heat transfer.

[0049] Since the refrigerator body, door, and refrigeration system of this type are all known and easily implemented by those skilled in the art, those skilled in the art can choose the refrigeration system as needed. In order not to obscure or obscure the inventive points of this application, the following text will not elaborate on the body 110, door 120, and refrigeration system itself.

[0050] The magnetic field preservation device 20 is arranged within a storage compartment 130 and is equipped with a magnetic field component for applying a magnetic field to its internal preservation space 23. The magnetic field component can use either a permanent magnet or an electromagnetic component, that is, it can use an electromagnetic coil or a permanent magnet to generate a magnetic field. In some embodiments, an electromagnetic coil and a permanent magnet can also be used in combination to generate a magnetic field. Considering the structural size and the adjustability of the magnetic field, the magnetic field component using an electromagnetic component is preferred.

[0051] The magnetic field preservation device 20 has an air inlet and an air return outlet for connecting to the refrigeration duct 140, so as to introduce refrigeration airflow to cool the magnetic field preservation space inside.

[0052] Figure 2 This is a schematic diagram of the magnetic field preservation device 20 in a magnetic field preservation refrigerator 10 according to an embodiment of the present invention; Figure 3 yes Figure 2 A schematic diagram of the magnetic field preservation device 20 from another view angle. Figure 4 This is a side cross-sectional view of the magnetic field preservation device 20 in a magnetic field preservation refrigerator 10 according to an embodiment of the present invention. Figure 5 yes Figure 4 A magnified view of a section at point A in the middle; Figure 6 yes Figure 4 A magnified view of section B. The magnetic field preservation device 20 has an air inlet 231 and an air return outlet 232 for connecting to the refrigeration duct 140, so as to introduce a cooling airflow to cool the magnetic field preservation space 23 inside. The magnetic field preservation device 20 has an air inlet 231 and an air return outlet 232 for connecting to the refrigeration duct 140, and forms a surrounding air duct that starts from the air inlet 231, surrounds the preservation space 23 and returns to the air return outlet 232.

[0053] The magnetic field preservation device 20 can be configured as a drawer. For example, the magnetic field preservation device 20 may include a container 22 and a drawer 21. The rear of the container 22 forms an air inlet 231 and an air return outlet 232 that are connected to the refrigeration duct 140. The drawer 21 is pull-out and is installed inside the container 22, defining a preservation space 23. That is, the preservation space 23 inside the drawer 21 can achieve the magnetic field preservation function through magnetic field and temperature control.

[0054] The surrounding airflow enters the interior of the magnetic field preservation device 20 from the air inlet 231 at the top rear end of the device. After passing through the top wall 221 of the barrel 22, it enters the top of the front baffle 215 of the drawer 21, flows through the front baffle 215 of the drawer 21, and then enters the space below the bottom plate of the drawer. Finally, it returns to the return air inlet 232 located on the rear wall 224 of the barrel 22, completing the airflow circulation. The section of the surrounding airflow passing through the top wall 221 of the barrel 22, i.e., the section at the top of the magnetic field preservation device 20, is called the top section 241. The section of the surrounding airflow passing through the front baffle 215 of the drawer 21, i.e., the section at the front of the magnetic field preservation device 20, is called the front section 242. The section of the surrounding airflow passing through the space below the bottom plate of the drawer, i.e., the section at the bottom of the magnetic field preservation device 20, is called the bottom section 243. The surrounding airflow forms an air path around the preservation space 23 from front to back, effectively achieving uniform cooling.

[0055] That is, the surrounding air duct includes the top section 241 of the top wall 221 of the barrel 22, the front section 242 of the front baffle 215 of the drawer 21, and the bottom section 243 below the drawer 21. The airflow enters the top section 241 from the air inlet 231, then flows through the front section 242 and the bottom section 243 before entering the return air inlet 232.

[0056] The top wall 221 of the barrel body 22 may include: drawer top cover 211, outer shell panel 212, and top heat insulation panel 213. The top wall 221 of the barrel body 22 consists of the following components from top to bottom: outer shell panel 212, top heat insulation panel 213, and drawer top cover 211.

[0057] The return air vent 232 can be located in the middle of the rear wall 224 of the barrel 22. The top of the rear wall 224 extends obliquely towards the rear end of the top wall 221 of the barrel 22, and the air inlet 231 is located on this obliquely extending surface. The positions of the air inlet 231 and the return air vent 232 make the air duct of the magnetic field preservation device 20 and the magnetic field preservation refrigerator 10 work more smoothly, improving the air supply efficiency. In addition, the air inlet 231 is located at the rear top of the drawer 21 and is obliquely set, which reduces the space occupied by the air supply structure in the preservation space 23, making the structure more compact and effective.

[0058] The drawer top cover 211 faces the top opening of the drawer 21 and is used to seal the top space of the preservation space 23. An outer shell plate 212 is positioned above the drawer top cover 211 and has a first gap between it and the drawer top cover 211. A top heat insulation plate 213 is positioned within the first gap, and the space between the top heat insulation plate 213 and the drawer top cover 211 forms a top section 241 that surrounds the airflow channel flowing through the top wall 221 of the container 22. The drawer top cover 211 also has multiple through holes to connect the preservation space 23 with the top section 241. The diameter of the through holes can be set to be relatively small, allowing the cooling airflow to enter the preservation space 23 evenly and preventing direct blowing onto the stored items inside the preservation space 23.

[0059] To simplify the molding and processing, the barrel body 22 can be used as a separate inner barrel, either top and bottom or left and right, and fixed by special clips or screws, or it can be a one-piece molded barrel. The inner side wall of the barrel body 22 is provided with a corresponding drawer 21 mounting structure, slide rail or slide track.

[0060] The barrel 22 is equipped with insulation components on the outer side of the surrounding air duct, such as the top insulation plate 213, the middle partition plate 2152, the bottom insulation plate, and the rear wall insulation plate, which prevents the cold air from dissipating and improves the cooling efficiency.

[0061] Figure 7 This is a schematic diagram of the top section 241 of the surrounding air duct of the magnetic field preservation device 20 in a magnetic field preservation refrigerator 10 according to an embodiment of the present invention. Multiple air guide ribs 2131 are formed on the side of the top heat insulation plate 213 facing the drawer top cover 211, so as to guide the airflow in the top section 241 by means of the air guide ribs 2131, so that the airflow flows evenly through the top section 241.

[0062] Figure 8 This is an exploded view of the components of drawer 21 in the magnetic field preservation device 20 of a magnetic field preservation refrigerator 10 according to an embodiment of the present invention. The front baffle 215 of drawer 21 may include: a middle partition 2152, an air duct component 2153, a panel 2151, and an outer frame 2156. From front to back, they are panel 2151, middle partition 2152, and panel 2151. The outer frame 2156 serves as the outer peripheral frame of the front baffle 215 of drawer 21, and may have a support frame and a trim strip located on the outside of the support frame. The front baffle 215 of drawer 21 encloses the front space of the preservation space 23 and can be pulled out by the user.

[0063] The air duct component 2153 is disposed on the side of the middle partition 2152 facing the preservation space 23, and together with the middle partition 2152, defines the front section 242 of the air duct flowing around the front baffle 215. The top of the air duct component 2153 is connected to the front baffle air inlet 2154 of the top section 241. The front ends of the multiple air guide ribs 2131 of the top heat insulation plate 213 can guide the airflow to the front baffle air inlet 2154.

[0064] Panel 2151 is disposed on the side opposite to the middle partition 2152 and the preservation space 23, forming an air-insulated space between it and the middle partition 2152. Panel 2151 may be made of glass. That is, the middle partition 2152 divides the front baffle 215 of drawer 21 into two chambers. The front chamber is an air-insulated space to prevent cold air leakage. The rear chamber is the front section 242 surrounding the air duct. The middle partition 2152 may also be made of insulating material to further prevent cold air leakage. Multiple protrusions may be formed on the side of the middle partition 2152 facing panel 2151, abutting against the rear side of panel 2151 to support panel 2151.

[0065] The double-layer structure of the front baffle 215 of drawer 21 is compact and provides good insulation. The front baffle 215 of drawer 21 can be connected into a single unit using decorative strips or screw clips. The two layers enhance insulation, and the fit between the partition 2152, air duct 2153, panel 2151, and outer frame 2156 can be easily and simply fixed together using fewer components, such as clips, claws, or holes. The lower end of the partition 2152 has a corresponding plug-in structure that connects to the lower part of drawer 21, forming a fixed unit. A sealing strip can also be installed on the rear side of the outer frame 2156 of the front baffle 215 of drawer 21, which cooperates with the sealing groove at the front end of the container 22 to seal the preservation space 23.

[0066] To simplify the molding and processing, the barrel body 22 can be used as a separate inner barrel, either top and bottom or left and right, and fixed by special clips or screws, or it can be a one-piece molded barrel. The inner side wall 225 of the barrel body 22 is provided with a corresponding drawer 21 mounting structure, slide rail or slide track.

[0067] The drawer 21 is fitted with guide rails on both sides of the container 22, allowing it to be pulled out along the front-to-back direction of the container 22. After the drawer 21 is retracted into the container 22, it forms a relatively sealed preservation space 23, where preservation is achieved through a magnetic field applied by the magnetic field component.

[0068] The barrel 22 is equipped with insulation components on the outer side of the surrounding air duct, such as the top insulation plate 213, the middle partition plate 2152, the bottom insulation plate, and the rear wall insulation plate, which prevents the cold air from dissipating and improves the cooling efficiency.

[0069] Figure 9This is a schematic diagram of the air guide 214 of the magnetic field preservation device 20 in a magnetic field preservation refrigerator 10 according to an embodiment of the present invention. The top wall 221 of the barrel 22 also includes the air guide 214. The air guide 214 is disposed at the front end of the top wall 221 of the barrel 22. The rear part of the air guide 214 has a first air guide port 2141 communicating with the front end of the top section 241. The bottom of the air guide 214 is opposite to the front baffle air inlet 2154 and has a second air guide port 2142 for communicating with the front baffle air inlet 2154, thereby guiding the airflow of the top section 241 into the front section 242. The bottom of the air guide 214 and the top of the air duct 2153 are respectively set as inclined surfaces sloping downward from front to back. By using the guidance of the air guide 214, wind resistance and noise can be reduced. A grille may be provided at the air inlet 2154 of the front baffle, which is in conjunction with the air guide 214 and the air duct structure of the front section 242.

[0070] The first air vent 2141 and the front baffle air inlet 2154 can be an inclined surface with an angle of 1-89°. The gap between the front baffle air inlet 2154 and the inner tub is 0-10mm, and the gap can be filled with a sealing strip to ensure tight contact without hard interference. The opening area of ​​the front baffle air inlet 2154 must be greater than or equal to the area of ​​the front end of the top section 241. The air duct component 2153 can be made of ordinary plastic or a plastic material with good thermal conductivity (with a thermally conductive or heat-insulating coating). It is connected to the drawer 21 and the drawer front cover by a specific plug-in fitting method. A certain amount of heat insulation material (foam, PE, or VIP, etc.) is pasted inside the air duct component 2153, and the front baffle air outlet 2155 at the lower end of the air duct component 2153 allows the airflow to completely enter the bottom section 243 surrounding the air duct, so that the airflow passes evenly through the bottom section 243.

[0071] The drawer bottom plate and the bottom wall 223 of the barrel 22 are spaced apart to form a space below, which serves as the bottom section 243 surrounding the air duct. A front baffle air outlet 2155 is provided at the front of the drawer bottom plate opposite to the bottom end of the air duct component 2153, so as to connect the bottom section 243.

[0072] 10 is a schematic diagram of the magnetic field component 30 of the magnetic field preservation device 20 in a magnetic field preservation refrigerator 10 according to an embodiment of the present invention.

[0073] The magnetic field assembly of the magnetic field preservation refrigerator 10 can use electromagnetic components or permanent magnets as magnetic field elements. For example, an electromagnetic plate can be formed by combining an electromagnetic coil with a magnetic plate, or a magnetic plate can be made of a permanent magnet. In addition, the magnetic field assembly can also combine electromagnetic coils and permanent magnets to generate a magnetic field.

[0074] In some embodiments, the magnetic component may include two magnetic plates arranged opposite each other, for example, on the top and bottom walls of the magnetic field preservation device 20. The magnetic field direction of the magnetic plates may be set to face the same direction, thereby forming a uniform magnetic field with a strength that meets the preservation requirements within the magnetic field preservation space 23.

[0075] In some embodiments, the magnetic field assembly may further include a magnetic conductive tape. The magnetic conductive tape is used to connect opposing magnetic plates to form an annular magnetic conductive path surrounding drawer 21. The annular magnetic conductive path can be made of a material with low coercivity and high permeability. This magnetic conductive path can be used to concentrate the magnetic field, improve the uniformity of the magnetic field within the storage space, and reduce the release of the magnetic field to the outside, thus reducing interference with other components outside the magnetic field preservation device 20 (e.g., preventing the magnetization of other components). The magnetic field helps improve storage quality, shortens freezing time, reduces the rate of juice and nutrient loss from food, reduces the number of microorganisms and bacteria, and extends the preservation period. Furthermore, the magnetic field preservation device 20 is configured to form an encircling airflow channel from the air inlet 231 through the top wall 221 of the container 22, the front baffle 215 of the drawer 21, and the space below the drawer bottom plate, returning to the return air inlet 232 to cool the preservation space 23. Furthermore, by combining the geomagnetic field with temperature control, the surrounding air duct is used to cool the preservation space 23. The cold air can also remove the heat generated when the electromagnetic coil is working, thus avoiding temperature fluctuations in the preservation space 23. By combining the effects of temperature and magnetic field, the preservation effect of food in the preservation space 23 is improved.

[0076] Figure 10 This is a schematic diagram of the air duct of the magnetic field preservation device 20 in a magnetic field preservation refrigerator 10 according to an embodiment of the present invention. Figure 11 This is a system block diagram of the control components of the magnetic field preservation device 20 in a magnetic field preservation refrigerator 10 according to an embodiment of the present invention.

[0077] The temperature detection assembly 25 may include one or more temperature detection components. These components may be positioned at different locations within the surrounding air duct and used to detect the temperature within the magnetic field preservation device 20. In one optional embodiment, the temperature detection assembly 25 may include a first temperature detection component 251 and a second temperature detection component 252. The first temperature detection component 251 is located upstream of the airflow in the surrounding air duct, and the detected temperature value is recorded as a first temperature value. The second temperature detection component 252 is located downstream of the airflow in the surrounding air duct, and the detected temperature value is recorded as a second temperature value. The first temperature detection component 251 is located at the rear of the top section 241 of the surrounding air duct, near the air inlet 231; the second temperature detection component 252 is located at the front of the top section 241 or the front of the bottom section 243 of the surrounding air duct, closer to the return air inlet 232.

[0078] Because the upstream section of the airflow, that is, the rear part of the top section 241 in the surrounding air duct, is close to the air inlet 231, its temperature is relatively low during the operation of the evaporator 150; while the downstream section of the airflow, that is, the front part of the top section 241 or the front part of the bottom section 243, convects with the air in the preservation space 23 through the through holes, and its temperature is relatively high. The overall temperature of the magnetic field preservation device 20 can be determined by the first temperature detection component 251 and the second temperature detection component 252 located at different positions in the surrounding air duct.

[0079] In other embodiments, the temperature detection component 25 may use only one temperature detection element, for example, retaining one of the first temperature detection element 251 and the second temperature detection element 252, or setting a temperature detection element in another location inside the magnetic field preservation device 20.

[0080] The refrigeration system 16 includes a damper 161 and a fan 160 that can control the flow and size of the refrigeration airflow into the magnetic field preservation device 20, as well as the start / stop and speed adjustment of the compressor 162, thereby changing the refrigeration load (i.e., refrigeration capacity). The damper 161 can be located between the air inlet 231 and the refrigeration duct 140 and configured for controlled opening and closing. The fan 160 can be used to promote the formation of a refrigeration airflow circulating within the duct.

[0081] In some alternative embodiments, the magnetic field preservation device 20 is arranged in the cold storage room, the fan 160 can be a refrigeration fan that supplies air to the cold storage room, and the damper 161 is used to open and close the air inlet 231. The evaporator 150 can be a refrigeration evaporator specifically designed for cooling the cold storage room.

[0082] The refrigeration controller 17 includes a memory 172 and a processor 171. The memory 172 stores a machine-executable program 173. When the machine-executable program 173 is executed by the processor 171, it implements the refrigeration control method of the magnetic field preservation refrigerator of this embodiment.

[0083] The refrigeration controller 17 is connected to the refrigeration system 16 and provides control signals to the refrigeration system 16. The control signals are used to control the opening and closing of the damper 161, the start and stop of the fan 160, the start and stop of the compressor 162, and its speed, thereby adjusting the refrigeration load. The refrigeration controller 17 can be integrated into the main control board of the refrigerator 10.

[0084] The refrigeration controller 17 can be implemented by various devices with certain data processing capabilities. In a typical configuration, the controller 300 may include a processor 310, a memory 320, input / output interfaces, etc. The refrigeration controller 17 can accept the measurement results from the temperature detection component 25 as the basis for controlling the refrigeration system 16.

[0085] This embodiment also provides a cooling control method for a magnetic field preservation refrigerator, which is used to control the magnetic field preservation refrigerator of the above embodiment and can realize rapid and stable cooling of the magnetic field preservation device 20. Figure 12 A schematic diagram of a refrigeration control method for a magnetic field preservation refrigerator according to an embodiment of the present invention, the refrigeration control method of the magnetic field preservation refrigerator generally includes:

[0086] Step S102: Obtain the status of the magnetic field preservation space. The status of the magnetic field preservation space includes the internal temperature of the magnetic field preservation device, the operating status of the magnetic field, and the operating status of the refrigeration system.

[0087] Step S104: Determine whether the state of the magnetic field preservation space meets the preset rapid cooling start-up conditions. These rapid cooling start-up conditions can be set based on the need for rapid cooling after the magnetic field preservation device is opened or new stored items are placed inside. For example, this can be determined by whether the first temperature value detected by the first temperature detection component is greater than or equal to a first temperature threshold. If the first temperature value is greater than the first temperature threshold, then the state of the magnetic field preservation space is determined to meet the rapid cooling start-up conditions.

[0088] Step S106: If the rapid cooling start-up conditions are met, control the refrigeration system to rapidly cool the magnetic field preservation device until the state of the magnetic field preservation space meets the preset rapid cooling end conditions. During the rapid cooling process, the refrigeration system continuously provides cooling airflow to the magnetic field preservation device at a high cooling load. For example, the speed of the fan and compressor can be set to a higher level than normal, thereby improving the cooling capacity.

[0089] Step S108: After the refrigeration system completes the rapid cooling of the magnetic field preservation device, the refrigeration system is controlled to perform one or more stages of transitional cooling process on the magnetic field preservation device.

[0090] The conditions for ending rapid cooling may include: a first temperature value being less than or equal to a second temperature threshold and / or a second temperature value detected by a second temperature detection component being less than or equal to a third temperature threshold, the second temperature threshold being less than the first temperature threshold, and the third temperature threshold being less than the second temperature threshold. That is, after the temperature of the magnetic field preservation device has rapidly decreased to a preset range, it enters a transitional cooling process. This transitional cooling process can also be called a pre-cooling mode.

[0091] The transitional refrigeration process may include one or more stages. In the case of a transitional refrigeration process including multiple stages, the steps for controlling the refrigeration system to perform a multi-stage transitional refrigeration process on the magnetic field preservation device include:

[0092] In each stage, if the first temperature value is greater than or equal to the refrigeration start-up temperature threshold corresponding to that stage, the refrigeration system is controlled to start and provide refrigeration airflow to the magnetic field preservation device under normal refrigeration load conditions; if the first temperature value is less than the refrigeration shutdown temperature threshold corresponding to that stage, the refrigeration system is controlled to stop providing refrigeration airflow to the magnetic field preservation device; after the number of times the refrigeration system stops providing refrigeration airflow to the magnetic field preservation device exceeds a preset number threshold, or after the second temperature value is less than or equal to the stage temperature threshold of that stage, the transition refrigeration of the next stage begins.

[0093] As cooling progresses, the cooling shutdown temperature threshold and cooling start temperature threshold in the subsequent transition cooling stage are lower than those in the previous transition cooling stage; the stage temperature threshold in the subsequent transition cooling stage is lower than that in the previous transition cooling stage.

[0094] By using a multi-stage transitional cooling process, the cooling rate can be gradually reduced, thus avoiding excessive temperature fluctuations in the magnetic field preservation device.

[0095] Step S110: After the refrigeration system completes the transition cooling of the magnetic field preservation device, control the refrigeration system to perform normal cooling of the magnetic field preservation device. During the final stage of transition cooling of the magnetic field preservation device, if the number of times the refrigeration system stops supplying cooling airflow to the magnetic field preservation device exceeds a preset threshold, or if the second temperature value is less than or equal to the stage temperature threshold of the final stage, execute the step of controlling the refrigeration system to perform normal cooling of the magnetic field preservation device.

[0096] Under normal cooling load conditions, the cooling load and airflow of the refrigeration system are both lower than those under high cooling load conditions. This means the fan and compressor speeds can be set to normal levels. During both the transition cooling and normal cooling processes, the refrigeration system operates at normal cooling load conditions; compared to the high cooling load conditions during rapid cooling, the fan and compressor speeds are set lower.

[0097] This embodiment's method rapidly cools the food in a magnetic field preservation space when rapid cooling is required, meeting the rapid cooling requirements after the magnetic field preservation device is opened or new stored items are placed inside. After the refrigeration system completes rapid cooling of the magnetic field preservation device, it controls the system to perform one or more stages of transitional cooling. This transitional cooling process slows down the rate of temperature decrease after the rapid cooling technology, preventing rapid temperature fluctuations. By combining the effects of temperature and magnetic field, the preservation effect of food in the preservation space is improved.

[0098] Figure 13A flowchart illustrating an optional implementation of the refrigeration control method for a magnetic field preservation refrigerator according to an embodiment of the present invention is provided. This implementation involves a two-stage transition refrigeration process. Those skilled in the art can implement one or more stages of transition refrigeration based on this. Figure 13 As shown, the control flow includes:

[0099] Step S202: Obtain the first temperature value Tsnr1 detected by the first temperature detection component and the second temperature value Tsnr2 detected by the second temperature detection component;

[0100] Step S204: Determine whether the state of the magnetic field preservation space meets the preset rapid cooling start-up conditions, that is, determine whether Tsnr1≥T1 is true. T1 is the first temperature threshold, which can be set according to the set temperature of the magnetic field preservation device. For example, when the set temperature is near the freezing point, T1 can be set to about 5 degrees Celsius.

[0101] In step S206, the refrigeration system rapidly cools the magnetic field preservation device, with the fan and compressor operating at high speed. In other words, in rapid cooling mode, the fan and compressor speeds can be set to higher levels than in normal operation, thereby increasing cooling capacity.

[0102] Step S208: Determine whether Tsnr1≤T2 or Tsnr1≤T3 is true. T2 is the second temperature threshold, and T3 is the third temperature threshold. The second temperature threshold T2 is less than the first temperature threshold T1, and the third temperature threshold T3 is less than the second temperature threshold T2. For example, T2 can be set to 1 degree Celsius, and T3 can be set to -1 degree Celsius.

[0103] In step S210, the refrigeration system enters the first stage of transitional cooling. When Tsnr1 is greater than or equal to Ton1, refrigeration starts, and the fan and compressor run at normal speed. When Tsnr1 is less than or equal to Toff1, refrigeration stops. Ton1 is the refrigeration start-up temperature threshold corresponding to the first stage of transitional cooling, and Toff1 is the refrigeration stop-down temperature threshold corresponding to the first stage of transitional cooling. For example, Ton1 can be set to -1 degree Celsius, and Toff1 can be set to -1.5 degrees Celsius.

[0104] Step S212 determines whether the number of times Tsnr1 is less than or equal to Toff1 exceeds a threshold, or whether Tsnr2 ≤ Ts1, where Ts1 is the stage temperature threshold for the first stage. In other words, this step determines whether the number of times the refrigeration system stops supplying cooling airflow to the magnetic field preservation device exceeds a preset threshold (e.g., 5 times), or whether the second temperature value is less than or equal to the stage temperature threshold for the first stage. Ts1 can be set to -1 degree Celsius.

[0105] In step S214, the refrigeration system enters the second stage of transitional cooling. When Tsnr1 is greater than or equal to Ton2, refrigeration starts, and the fan and compressor run at normal speed. When Tsnr1 is less than or equal to Toff2, refrigeration stops. Ton2 is the refrigeration start-up temperature threshold corresponding to the second stage of transitional cooling, and Toff2 is the refrigeration stop-down temperature threshold corresponding to the second stage of transitional cooling. For example, Ton2 can be set to -1.5 degrees Celsius, and Toff2 can be set to -2 degrees Celsius.

[0106] Step S216: Determine whether the number of times Tsnr1 is less than or equal to Toff2 exceeds a threshold, or whether Tsnr2 ≤ Ts2, where Ts2 is the stage temperature threshold for the second stage. That is, this step determines whether the number of times the refrigeration system stops supplying cooling airflow to the magnetic field preservation device exceeds a preset threshold (e.g., 5 times), or whether the second temperature value is less than or equal to the stage temperature threshold for the second stage. Ts2 can be set to -2 degrees Celsius.

[0107] Step S218: The refrigeration system enters the normal cooling phase. When Tsnr1 is greater than or equal to the normal cooling start-up temperature, refrigeration starts, and the fan and compressor run at normal speed; when Tsnr1 is less than or equal to the normal cooling shutdown temperature, refrigeration shuts off. The normal cooling start-up temperature can be set to -2.0 degrees Celsius, and the normal cooling shutdown temperature can be set to -2.5 degrees Celsius.

[0108] In the above embodiments, the first temperature detection component can be located at the top of the magnetic field preservation device, with Tsnr1 indicating the air temperature at the top of the magnetic field preservation device. The second temperature detection component can be located at the bottom of the magnetic field preservation device, with Tsnr1 indicating the air temperature at the bottom of the magnetic field preservation device. In a non-freezing scenario, to ensure the food does not freeze, T1 can be set to approximately 5 degrees Celsius. Ton1 can be set to -1 degree Celsius, Toff1 can be set to -1.5 degrees Celsius, Ton2 can be set to -1.5 degrees Celsius, and Toff2 can be set to -2 degrees Celsius. The normal cooling start-up temperature can be set to -2.0 degrees Celsius, and the normal cooling shutdown temperature can be set to -2.5 degrees Celsius. Ts1 can be set to -1 degree Celsius, and Ts2 can be set to -2 degrees Celsius.

[0109] The above thresholds are merely illustrative examples. When using the method of this embodiment, the threshold parameters can be set as needed. This method can achieve rapid cooling under high temperatures while preventing rapid temperature fluctuations and changes that could lead to a decline in the quality of stored goods.

[0110] The technical solutions of the present invention have been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to related technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of the present invention will fall within the scope of protection of the present invention.

Claims

1. A refrigeration control method for a magnetic field preservation refrigerator, the magnetic field preservation refrigerator comprising: A housing that internally defines a storage compartment; a cooling duct that provides cooling airflow to the storage compartment; A refrigeration system for generating the cooling airflow; A magnetic field preservation device is arranged in the storage room. The magnetic field preservation device has an air inlet and an air return outlet for connecting the refrigeration air duct to introduce the refrigeration airflow to cool the magnetic field preservation space inside. The magnetic field preservation device forms a surrounding air duct that starts from the air inlet, surrounds the preservation space, and returns to the air return outlet. The magnetic field preservation refrigerator also includes: a first temperature detection component, which is set in the upstream section of the airflow in the surrounding air duct, and the detected temperature value is recorded as a first temperature value; and a second temperature detection component, which is set in the downstream section of the airflow in the surrounding air duct, and the detected temperature value is recorded as a second temperature value. And the cooling control method includes: Determine whether the state of the magnetic field preservation space meets the preset rapid cooling start-up conditions; If so, control the refrigeration system to rapidly refrigerate the magnetic field preservation device until the state of the magnetic field preservation space meets the preset rapid refrigeration termination condition. After the refrigeration system completes rapid cooling of the magnetic field preservation device, the refrigeration system is controlled to perform a multi-stage transitional cooling process on the magnetic field preservation device. In each stage of the transitional cooling process, after the number of times the refrigeration system stops providing the cooling airflow to the magnetic field preservation device exceeds a preset threshold, or after the second temperature value is less than or equal to the stage temperature threshold of that stage, the next stage of transitional cooling begins. After the refrigeration system completes the transitional refrigeration of the magnetic field preservation device, the refrigeration system is controlled to perform normal refrigeration on the magnetic field preservation device.

2. The refrigeration control method for the magnetic field preservation refrigerator according to claim 1, wherein... The process of the refrigeration system rapidly cooling the magnetic field preservation device is configured such that the refrigeration system continuously provides the cooling airflow to the magnetic field preservation device at a high cooling load.

3. The refrigeration control method for the magnetic field preservation refrigerator according to claim 2, wherein, The step of determining whether the state of the magnetic field preservation space meets the preset rapid cooling start-up conditions includes: Determine whether the first temperature value detected by the first temperature detection component is greater than or equal to the first temperature threshold. If so, determine that the state of the magnetic field preservation space meets the rapid cooling start-up conditions.

4. The refrigeration control method for the magnetic field preservation refrigerator according to claim 3, wherein... The rapid cooling termination conditions include: The first temperature value is less than or equal to the second temperature threshold and / or the second temperature value detected by the second temperature detection component is less than or equal to the third temperature threshold, the second temperature threshold is less than the first temperature threshold, and the third temperature threshold is less than the second temperature threshold.

5. The refrigeration control method for the magnetic field preservation refrigerator according to claim 4, wherein, The transitional refrigeration process includes multiple stages, and the steps of controlling the refrigeration system to perform the multiple stages of the transitional refrigeration process on the magnetic field preservation device include: In each stage, if the first temperature value is greater than or equal to the refrigeration start-up temperature threshold corresponding to that stage, the refrigeration system is controlled to start and provide the refrigeration airflow to the magnetic field preservation device under normal refrigeration load conditions; if the first temperature value is less than the refrigeration shutdown temperature threshold corresponding to that stage, the refrigeration system is controlled to stop providing the refrigeration airflow to the magnetic field preservation device.

6. The refrigeration control method for the magnetic field preservation refrigerator according to claim 5, wherein, As cooling progresses, the cooling shutdown temperature threshold and cooling start temperature threshold in the subsequent transition cooling stage are lower than those in the previous transition cooling stage; the stage temperature threshold in the subsequent transition cooling stage is lower than that in the previous transition cooling stage.

7. The refrigeration control method for the magnetic field preservation refrigerator according to claim 5, wherein, During the final stage of transitional cooling of the magnetic field preservation device by the refrigeration system, if the number of times the refrigeration system stops supplying the refrigeration airflow to the magnetic field preservation device exceeds a preset threshold, or if the second temperature value is less than or equal to the stage temperature threshold of the final stage, the step of controlling the refrigeration system to perform normal cooling of the magnetic field preservation device is executed.

8. The refrigeration control method for the magnetic field preservation refrigerator according to claim 5, wherein, Under normal cooling load conditions, the cooling load of the refrigeration system and the magnitude of the cooling airflow are both less than those under high cooling load conditions.

9. A magnetic field preservation refrigerator, comprising: The container, with its internal storage compartments; A cooling air duct provides cooling airflow to the storage compartment; A refrigeration system is used to generate the refrigerated airflow; A magnetic field preservation device is arranged in the storage room and has an air inlet and an air return outlet for connecting the refrigeration air duct to introduce the refrigeration airflow to cool the magnetic field preservation space inside. The magnetic field preservation device forms a surrounding air duct that starts from the air inlet, surrounds the preservation space and returns to the air return outlet. The first temperature detection component is located in the upstream section of the airflow in the surrounding air duct, and the detected temperature value is recorded as the first temperature value. The second temperature detection component is located in the downstream section of the airflow in the surrounding air duct, and the detected temperature value is recorded as the second temperature value. A refrigeration controller includes a memory and a processor, wherein the memory stores a machine-executable program that, when executed by the processor, implements the refrigeration control method of a magnetic field preservation refrigerator according to any one of claims 1 to 8.

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