Freezer equipped with magnetic field freshness preservation device

Abstract

A freezing device for a magnetic freshness preservation device includes a cabinet with a storage chamber defined therein and a cooling air duct formed at the rear of the storage chamber for supplying a cooling air flow, and a magnetic freshness preservation device disposed within the storage chamber and having a magnetic field assembly for applying a magnetic field to a freshness preservation space within the cabinet. The magnetic freshness preservation device includes a case with an air inlet and a return air port formed at the rear thereof communicating with the cooling air duct, and a drawer disposed within the case so as to be removable and defining a freshness preservation space therein. The magnetic freshness preservation device is configured to cool the freshness preservation space by forming a wrap-around air duct that directs air flow from the air inlet through the top wall of the case, the front baffle of the drawer, the space below the bottom plate of the drawer, and returning to the return air port. The freezing device can reduce temperature fluctuations in the freshness preservation space and improve the freshness preservation effect of food in the freshness preservation space.

Description

[Technical Field]

[0001] The present invention relates to a refrigeration device, and more particularly to a refrigeration device equipped with a magnetic freshness preservation device. [Background technology]

[0002] When using existing freezing equipment (refrigerators, freezers, freezer cavities, etc.) to store ingredients such as meat, fish, and shrimp, the meat loses its juices, and the fish and shrimp deteriorate, resulting in a loss of nutrients and a deterioration in texture.

[0003] This study has found that magnetic fields can inhibit the growth of microorganisms and mold and extend the shelf life of food. Therefore, using magnetic fields to assist in food preservation can achieve the goal of extending the shelf life of food. When a magnetic field is used to assist in food preservation, it restricts the free range of water molecules to a certain extent, specifically by breaking the hydrogen bonds within clusters of water molecules. This inhibits the growth of water nuclei during the phase change process, making the growth rate of ice crystals faster than the migration rate of water molecules, resulting in smaller ice crystals, which reduces damage to cells and reduces the loss of food juices, thereby better preserving the nutrients and texture of food.

[0004] To preserve freshness, the magnetic field must be adjusted to the storage temperature. Actual tests conducted under non-frozen fresh storage conditions showed that the best storage temperature is 5-8°C, and the cooling rate must be relatively smooth. However, when a magnetic field is applied to the freshness preservation space, the magnetic field generator (generally an electromagnetic device) generates heat, causing temperature fluctuations that can affect the quality of freshness preservation. Summary of the Invention

[0005] One object of the present invention is to provide a refrigeration system equipped with a magnetic freshness preservation device for improving cooling performance.

[0006] A further object of the present invention is to compact the structure of a refrigeration unit equipped with a magnetic freshness-preserving device and increase the volume of use.

[0007] A further object of the present invention is to make the temperature of the freshness-keeping space of the magnetic freshness-keeping device uniform.

[0008] In order to achieve the above object, the present invention provides a refrigeration device equipped with a magnetic freshness preservation device, a storage body having a storage chamber defined therein and a cooling air duct formed at the rear of the storage chamber for supplying a cooling air flow; and a magnetic freshness-keeping device disposed in the storage chamber and having a magnetic field assembly for applying a magnetic field to the freshness-keeping space therein. The magnetic freshness preservation device includes a case having an air inlet and a return air outlet at the rear thereof, which are connected to a cooling air duct, and a drawer that is arranged so that it can be pulled out within the case and defines a freshness preservation space therein. The magnetic freshness preservation device is configured to cool the freshness preservation space by forming a wraparound air duct so that air flows from the air inlet through the top wall of the case, the front baffle of the drawer, and the space below the bottom plate of the drawer in that order before returning to the return air outlet.

[0009] Optionally, the top wall of the case includes a drawer top cover facing the top opening of the drawer, a housing plate arranged above the drawer top cover and spaced a first distance from the drawer top cover, and a top insulation plate arranged within the first distance, the space between the top insulation plate and the drawer top cover forming a top zone of a wraparound air duct passing through the top wall of the case, and the drawer top cover has a plurality of through holes that communicate with the freshness-keeping space and the top zone.

[0010] Optionally, a plurality of air guide ribs are provided on the side of the top insulation board facing the drawer top cover, and the air guide ribs are used to straighten the air flow in the top zone so that the air flow passes through the top zone uniformly.

[0011] Optionally, the magnetic field assembly includes a first focusing magnetic flux plate (magnetic collecting plate or magnetic permeable plate) arranged on the drawer top cover and a first magnetic member, the entire first magnetic member being flat and affixed to the first focusing magnetic flux plate.

[0012] Optionally, the magnetic field assembly includes a second magnetic flux focusing plate and a second magnetic member disposed on the bottom wall of the case, the second magnetic member being entirely flat and attached to the second magnetic flux focusing plate; The first and second focusing flux plates are arranged opposite each other, and the magnetic field assembly includes a magnetic conductive belt arranged on a side wall of the case and connecting the first and second focusing flux plates to form a circular magnetic path around the drawer.

[0013] Optionally, the freezer equipped with the magnetic freshness preservation device further includes a first temperature detection element and a second temperature detection element, each of which is disposed on the top cover of the drawer, the first temperature detection element being disposed near the air inlet, and the second temperature detection element being disposed on the front baffle near the drawer.

[0014] Optionally, the front baffle of the drawer can be A central partition plate, an air duct member disposed on a side of the central partition plate facing the freshness-keeping space, the air duct member defining, together with the central partition plate, a front zone of the wrap-around air duct passing through the front baffle, the top of the air duct member communicating with the front baffle air inlet of the top zone; The panel is arranged on the opposite side of the central partition plate to the freshness preservation space, and an air heat insulating space is formed between the panel and the central partition plate.

[0015] Optionally, the top wall of the case comprises: The case further includes an air guide member arranged at the front end of the top wall, the rear of which has a first air guide port communicating with the front end of the top zone, the bottom of the air guide member facing the air inlet of the front baffle and having a second air guide port communicating with the front baffle air inlet, and the air guide member guiding the air flow in the top zone to the front zone, the bottom of the air guide member and the top of the air duct member each having an inclined surface sloping downward from the front to the rear.

[0016] Optionally, the drawer bottom plate is spaced apart from the bottom wall of the case to define a lower space as a bottom zone of the wrap-around air duct, and a front baffle air outlet is provided at a position opposite the bottom end of the air duct member at the front of the drawer bottom plate, and communicates with the bottom zone using the front baffle air outlet.

[0017] Optionally, the rear wall of the case is disposed opposite and spaced from the rear of the storage compartment, the return air port is provided in the center of the rear wall, the top end of the rear wall extends at an incline toward the rear end of the top wall of the case, and the air inlet is provided on the inclined surface.

[0018] Based on the above description, those skilled in the art will understand that the technical solution described in the present invention includes a magnetic freshness-keeping device disposed in the storage compartment of a freezer and having a magnetic field assembly for applying a magnetic field to the freshness-keeping space within the device, which can improve the quality of stored items, shorten the freezing time, reduce the rate of juice loss and nutrient loss in food, reduce the number of microorganisms and bacteria, and extend the freshness-keeping cycle. Furthermore, the magnetic freshness-keeping device is configured to cool the freshness-keeping space by forming a wrap-around air duct that directs air from the air inlet through the top wall of the case, the front baffle of the drawer, and the space below the bottom plate of the drawer, and then back to the return air vent. Cooling the freshness-keeping space using the wrap-around air duct allows the cold air to quickly remove the heat generated by the operation of the magnetic element (e.g., electromagnetic element), avoiding temperature fluctuations in the freshness-keeping space. The combined effects of temperature and the magnetic field improve the freshness-keeping effect of food in the freshness-keeping space.

[0019] Furthermore, the wrap-around air duct prevents cold air from being blown directly onto the food in the freshness-keeping space, preventing a sudden drop in food temperature and deterioration of the quality of frozen and stored food, helping to lower the temperature evenly, and the wrap-around air duct can remove heat generated by magnetic components such as electromagnetic coils and reduce temperature fluctuations.

[0020] Furthermore, the refrigeration device of the present invention has an optimized and improved structure of the case and drawer of the magnetic freshness preservation device, making it possible to make the structure compact and reduce the storage space occupied.

[0021] 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 present invention taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0022] In order to more clearly describe the technical solutions of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the same reference numerals represent the same or similar components or parts in different accompanying drawings, and the accompanying drawings of the present invention are not necessarily drawn to scale.

[0023] [Figure 1] 1 is a schematic diagram of a refrigeration system according to one embodiment of the present invention; [Figure 2] 1 is a schematic diagram of a magnetic freshness preservation device for a refrigeration device according to one embodiment of the present invention. [Figure 3] 3 is a schematic diagram of another viewing angle of the magnetic freshness preservation device shown in FIG. 2. FIG. [Figure 4] 1 is a side cross-sectional view of a magnetic freshness preservation device for a refrigeration system according to an embodiment of the present invention. [Figure 5] FIG. 5 is a partial enlarged view of A in FIG. 4. [Figure 6] FIG. 5 is a partial enlarged view of B in FIG. [Figure 7] FIG. 1 is a schematic diagram of the top zone of a wraparound air duct of a magnetic freshness-keeping device for a refrigeration system according to one embodiment of the present invention. [Figure 8] FIG. 2 is an exploded view of the components of a drawer of a magnetic freshness preservation device for a refrigeration system according to an embodiment of the present invention. [Figure 9] 1 is a schematic diagram of an air guide member of a magnetic freshness preservation device for a refrigeration system according to an embodiment of the present invention; [Figure 10] 1 is a schematic diagram of a magnetic field assembly of a magnetic freshness preservation device for a freezer according to one embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0024] Those skilled in the art should understand that the embodiments described below are only some of the embodiments of the present invention, not all of the embodiments of the present invention, and some of the embodiments are used to interpret the technical principles of the present invention and do not limit the protection scope of the present invention. Based on the embodiments provided by the present invention, other embodiments obtained by those skilled in the art without creative work shall all fall within the protection scope of the present invention.

[0025] In describing the present invention, directions or positional relationships indicated by terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are used for convenience of description only, and do not indicate or imply that the apparatus or device necessarily has a specific orientation or is configured and operated in a specific orientation, and therefore should not be understood as a limitation of the present invention. Furthermore, it should be understood that terms such as "first," "second," "third," "main," and "sub" are used for descriptive purposes only, and do not indicate or imply relative importance.

[0026] Furthermore, in the description of the present invention, unless otherwise clearly defined or limited, the terms "attached," "coupled," "connected," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or internal communication between two devices. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0027] The refrigeration device of the present invention is a device for cooling and storing stored items, such as a refrigerator, a freezer, or a freezing cavity. While the accompanying drawings of this embodiment illustrate the form of a refrigerator, those skilled in the art can realize other refrigeration devices, such as a freezer or a freezing cavity, based on the description of this embodiment. Hereinafter, the refrigeration device of the present invention will be described in detail with reference to the accompanying drawings.

[0028] 1 is a schematic diagram of a refrigeration system according to one embodiment of the present invention. The refrigeration system 10 may be a refrigerator and includes a cabinet 110, a door 120, and a cooling system (not shown). At least one open-front storage compartment 130 is defined within the cabinet 110, and typically includes multiple compartments, such as a refrigerated storage compartment, a freezer storage compartment, and a temperature-variable storage compartment. The specific number and functions of the storage compartments 130 can be determined in advance according to needs.

[0029] The refrigeration apparatus 10 may cool the storage compartment 130 by air cooling. That is, an air duct system is provided in the cabinet 110, and a fan 160 is used to send the cooled air flow that has exchanged heat in the heat exchanger 150 (evaporator) to the storage compartment 130 through the air outlet, and then return it to the air duct through the return air outlet 232. This achieves cooling. In some embodiments, a cooled air duct 140 for supplying the cooled air flow is formed at the back of the storage compartment 130, and the heat exchanger 150 may be disposed in the cooled air duct 140 to exchange heat with the air flow that passes through it. A fan 160 may be disposed in the cooled air duct 140 to induce the formation of the circulating cooled air flow.

[0030] Alternatively, there may be a plurality of storage compartments, with at least one of the storage compartments being provided with the magnetic freshness-preserving device 20. Those skilled in the art may provide one cooling system and air duct for each storage compartment as needed, for example, one heat exchanger 150 for one storage compartment, or one heat exchanger 150 for two or more storage compartments.

[0031] The body, door, and cooling system of such a refrigerator are all well known and easily realized by those skilled in the art, and those skilled in the art can select the cooling system and air duct system as needed. In order to avoid obscuring or blurring the main points of this application, detailed descriptions of the body 110, door 120, and cooling system themselves will be omitted hereinafter.

[0032] The magnetic freshness-preserving device 20 is disposed within one storage compartment 130 and includes a magnetic field assembly for applying a magnetic field to the freshness-preserving space 23 therein. The magnetic field strength may be set within a range of 1 G to 100 G. When applied to a freezer environment, the magnetic field strength range is preferably 5 to 60 G, e.g., approximately 20 G. When applied to a refrigerated environment, the magnetic field strength range is preferably 20 to 160 G, e.g., 40 to 80 G, e.g., approximately 60 G. The magnetic field assembly may use a permanent magnet member or an electromagnetic member, i.e., an electromagnetic coil or a permanent magnet to generate the magnetic field. In some embodiments, the magnetic field may be generated using a combination of an electromagnetic coil and a permanent magnet.

[0033] Figure 2 is a schematic diagram of a magnetic freshness preservation device 20 of a freezer 10 according to one embodiment of the present invention. Figure 3 is a schematic diagram of the magnetic freshness preservation device 20 shown in Figure 2 from another viewing angle. Figure 4 is a side cross-sectional view of the magnetic freshness preservation device 20 of a freezer 10 according to one embodiment of the present invention. Figure 5 is a partial enlarged view of A in Figure 4. Figure 6 is a partial enlarged view of B in Figure 4.

[0034] Magnetic freshness-keeping device 20 may be configured as a drawer, and may include, for example, case 22 and drawer 21. An air inlet 231 and a return air vent 232 communicating with cooling air duct 140 are provided at the rear of case 22. Drawer 21 is disposed within case 22 so as to be retractable, and defines freshness-keeping space 23 therein. That is, freshness-keeping space 23 within drawer 21 can achieve a magnetic freshness-keeping function through magnetic field and temperature control.

[0035] The magnetic freshness-keeping device 20 is configured to form a wrap-around air duct that directs air from the air inlet 231 through the top wall 221 of the case 22, the front baffle 215 of the drawer 21, the space below the bottom plate of the drawer, and back to the return air vent 232, thereby cooling the freshness-keeping space 23. The wrap-around air duct enters the interior of the magnetic freshness-keeping device 20 through the air inlet 231 at the top rear end of the magnetic freshness-keeping device 20, passes through the top wall 221 of the case 22, enters the top end of the front baffle 215 of the drawer 21, passes through the front baffle 215 of the drawer 21, and then enters the space below the bottom plate of the drawer from the bottom, and then returns to the return air vent 232 at the rear wall 224 of the case 22, completing the air circulation. Here, the portion of the wrap-around air duct that passes through the zone of the top wall 221 of the case 22, i.e., the zone located at the top of the magnetic freshness-keeping device 20, is referred to as the top zone 241. The wrap-around air duct flows through the zone of the front baffle 215 of the drawer 21. That is, the zone at the front of the magnetic freshness-keeping device 20 is called the front zone 242. The wrap-around air duct flows through the zone of the space below the bottom plate of the drawer. That is, the zone at the bottom of the magnetic freshness-keeping device 20 is called the bottom zone 243. The wrap-around air duct forms an air duct that surrounds the freshness-keeping space 23 in the front-to-back direction, effectively realizing uniform temperature reduction.

[0036] The top wall 221 of the case 22 includes a drawer top cover 211, a housing plate 212, and a top heat insulating plate 213. On the top wall 221 of the case 22, the housing plate 212, the top heat insulating plate 213, and the drawer top cover 211 are arranged in this order from top to bottom.

[0037] Return air vent 232 may be provided in the center of rear wall 224 of case 22. The top end of rear wall 224 extends at an angle toward the rear end of top wall 221 of case 22, and air inlet 231 is provided on this angled surface. The positions of air inlet 231 and return air vent 232 allow the air ducts of magnetic freshness preservation device 20 and refrigeration device 10 to cooperate more smoothly, improving air circulation efficiency. In addition, because air inlet 231 is angled toward the rear top end of drawer 21, the occupancy rate of the air circulation structure in freshness preservation space 23 is reduced, resulting in a more compact and effective structure.

[0038] Drawer top cover 211 faces the top opening of drawer 21 and is used to seal the top space of freshness-keeping space 23. Housing plate 212 is disposed above drawer top cover 211, with a first gap between them. Top insulation plate 213 is disposed within the first gap, and a top zone 241 of a wraparound air duct passing through top wall 221 of case 22 is formed in the space between top insulation plate 213 and drawer top cover 211. Drawer top cover 211 has a plurality of through-holes that connect freshness-keeping space 23 to top zone 241. The diameter of the through-holes is set small so that the cooling airflow can enter freshness-keeping space 23 evenly and is not blown directly onto the stored items in freshness-keeping space 23.

[0039] A plurality of air guide ribs 2131 are further provided on the side of the top insulation plate 213 facing the drawer top cover 211, and the air guide ribs 2131 are used to straighten the air flow in the top zone 241 so that the air flow passes through the top zone 241 uniformly.

[0040] To simplify molding and processing, the case 22 may be divided into upper and lower or left and right halves to be used as inner cases, or may be a one-piece molded case secured together with special fastening means such as snaps or screws. The inside of the side walls of the case 22 is provided with a corresponding mounting structure, slide rails, or chute for the drawer 21.

[0041] Insulating members, such as a top insulating plate 213, a center partition plate 2152, a bottom insulating plate, and a rear wall insulating plate, are arranged on the outside of the wraparound air duct in the case 22. This prevents the cooling air from escaping and improves cooling efficiency.

[0042] 7 is a schematic diagram of the top zone 241 of the wraparound air duct of the magnetic freshness-preserving device 20 of the freezer 10 according to one embodiment of the present invention. The freezer 10 equipped with the magnetic freshness-preserving device 20 includes a first temperature-sensing element 251 and a second temperature-sensing element 252. The first temperature-sensing element 251 and the second temperature-sensing element 252 are each positioned opposite the drawer top cover 211. The first temperature-sensing element 251 is positioned near the air inlet 231, and the second temperature-sensing element 252 is positioned near the front baffle 215 of the drawer 21. The first temperature-sensing element 251 and the second temperature-sensing element 252 can accurately detect the temperature within the freshness-preserving space 23, providing a control basis for accurate temperature control.

[0043] In other embodiments, the first temperature sensing element 251 may be positioned opposite the drawer top cover 211, and the second temperature sensing element 252 may be positioned in the bottom zone 243 of the wrap-around air duct, i.e., the bottom wall 223 of the case 22. This allows the temperature conditions at different positions in the freshness-keeping space 23 to be reflected.

[0044] Drawer top cover 211 has a surface facing top zone 241 of wraparound air duct that is formed with receiving grooves for arranging first temperature detecting element 251 and second temperature detecting element 252. Selectable temperature control strategies are as follows: When the temperature detected by first temperature detecting element 251 is higher than the freshness-keeping set temperature, air supply to magnetic freshness-keeping device 20 is started; When the temperature detected by second temperature detecting element 252 is lower than the freshness-keeping temperature required for the food, air supply to magnetic freshness-keeping device 20 is stopped.

[0045] 8 is an exploded view of components of drawer 21 in magnetic freshness-keeping device 20 of freezer 10 according to one embodiment of the present invention. Front baffle 215 of drawer 21 may include center partition plate 2152, air duct member 2153, panel 2151, and outer frame 2156. From front to rear, the components are panel 2151, center partition plate 2152, and panel 2151, respectively. Outer frame 2156 functions as a peripheral frame for front baffle 215 of drawer 21 and may include a support frame and decorative trim on the outside of the support frame. Front baffle 215 of drawer 21 seals the front space of freshness-keeping space 23 and can be pulled out by the user.

[0046] The air duct member 2153 is disposed on the side of the central partition plate 2152 facing the freshness-keeping space 23, and together with the central partition plate 2152 defines the front zone 242 of the wrap-around air duct that passes through the front baffle 215. The top of the air duct member 2153 communicates with the front baffle air inlet 2154 of the top zone 241. The front ends of the multiple air guide ribs 2131 of the top insulation plate 213 can guide the air flow to the front baffle air inlet 2154.

[0047] The panel 2151 is disposed on the opposite side of the central partition 2152 from the freshness-keeping space 23, and an air-insulated space is formed between the panel 2151 and the central partition 2152. The panel 2151 may be made of a glass panel. That is, the central partition 2152 divides the front baffle 215 of the drawer 21 into two chambers, a front and a rear. The front chamber is an air-insulated space to prevent cold air leakage. The rear chamber is the front zone 242 of the wraparound air duct. The central partition 2152 may be made of an insulating material, which further prevents cold air leakage. The side of the central partition 2152 facing the panel 2151 has multiple protrusions formed thereon, which abut against the rear side of the panel 2151 and are used to support the panel 2151.

[0048] The above-described double-layered structure of the front baffle 215 of the drawer 21 allows for a compact structure and good thermal insulation. The front baffle 215 of the drawer 21 can be connected as a whole using decorative trim or screw snaps, etc., which enhances the thermal insulation effect. The cooperative structure between the central partition plate 2152, air duct member 2153, panel 2151, and outer frame 2156 allows for rational and simple fastening of the entire structure with only a few components, for example, by engaging with each other using snaps, engaging claws, engaging holes, etc. The lower end of the central partition plate 2152 is provided with a corresponding insertion structure, which is connected to and fixed to the bottom of the drawer 21 to form the entire structure. A sealing piece is further disposed on the rear side of the outer frame 2156 of the front baffle 215 of the drawer 21, which cooperates with the sealing groove at the front end of the case 22 to seal the freshness-keeping space 23.

[0049] Both sides of the drawer 21 cooperate with guide rail members of the case 22, and the drawer 21 as a whole can be pulled out in the front-to-rear direction of the case 22. After the drawer 21 houses the case 22, a relatively sealed freshness-preserving space 23 is formed, and freshness-preserving storage is achieved by the magnetic field applied by the magnetic field assembly.

[0050] 9 is a schematic diagram of an air guide member 214 of a magnetic freshness-preserving device 20 of a freezer 10 according to an embodiment of the present invention. The top wall 221 of the case 22 further includes an air guide member 214. The air guide member 214 is disposed at the front end of the top wall 221 of the case 22. A first air guide port 2141 is provided at the rear of the air guide member 214, which communicates with the front end of the top zone 241. The bottom of the air guide member 214 faces the front baffle air inlet 2154 and has a second air guide port 2142 that communicates with the front baffle air inlet 2154, guiding the airflow from the top zone 241 to the front zone 242. The bottom of the air guide member 214 and the top of the air duct member 2153 are each inclined downward from front to rear. The guidance provided by the air guide member 214 reduces wind resistance and noise. The front baffle air inlet 2154 is provided with a grille which cooperates with the air guide 214 and the air duct structure of the front zone 242 .

[0051] The first air guide port 2141 and the front baffle air inlet 2154 may be inclined at an angle of 1 to 89 degrees. The gap between the front baffle air inlet 2154 and the inner case may be 0 to 10 mm. The gap is tightly filled with a seal to prevent hardness interference. The opening area of ​​the front baffle air inlet 2154 must be larger than the area of ​​the front end of the top zone 241. The air duct member 2153 may be made of ordinary plastic or a plastic material with good thermal conductivity (with a thermal conductive or heat insulating coating). It is connected to the drawer 21 and the drawer front cover using a specific insertion and blending method. A certain insulating material (such as foam, PE, or VIP) is attached inside the air duct member 2153. The front baffle air outlet 2155 at the bottom of the air duct member 2153 allows the airflow to enter the bottom zone 243 of the wraparound air duct and pass through the bottom zone 243 evenly.

[0052] The bottom plate of the drawer is spaced apart from the bottom wall 223 of the case 22, and a space below is formed as the bottom zone 243 of the wraparound air duct. A front baffle air outlet 2155 is provided at the front of the bottom plate of the drawer opposite the bottom end of the air duct member 2153, and communicates with the bottom zone 243 using the front baffle air outlet 2155.

[0053] The bottom wall 223 of the case 22 is similarly multi-layered and may include, for example, from bottom to top, a bottom wall housing, a bottom insulation plate, and a drawer bottom cover. The bottom wall housing is the lowest component of the magnetic freshness-keeping device 20, and the bottom insulation plate is used for thermal insulation. The drawer bottom cover faces the drawer bottom at a distance, and the space between them serves as the bottom zone 243 of the wraparound air duct.

[0054] FIG. 10 is a schematic diagram of a magnetic field assembly 30 of a magnetic freshness preservation device 20 of a refrigeration system 10 according to one embodiment of the present invention.

[0055] The magnetic field assembly 30 includes two sets of magnetic members respectively arranged on the drawer top cover 211 and the bottom wall 223 of the case 22. Here, the first magnetic flux focusing plate 321 and the first magnetic member 311 are arranged on the drawer top cover 211, and the first magnetic member 311 is entirely flat and attached to the first magnetic flux focusing plate 321.

[0056] The second flux focusing plate 322 and the second magnetic member (shielded and not shown) are disposed on the bottom wall 223 of the case 22. The entire second magnetic member is flat and is attached to the second flux focusing plate 322.

[0057] The first and second flux focusing plates 321 and 322 are arranged opposite each other. The magnetic field assembly 30 may further include a magnetic conductive belt 323. The magnetic conductive belt 323 is arranged on the side wall of the case 22 and connects the first and second flux focusing plates 321 and 322 to form a circular magnetic path around the drawer 21. The circular magnetic path may be made of a material with low coercivity and high magnetic permeability. The formed magnetic path concentrates the magnetic field and improves the magnetic field uniformity within the storage space, while suppressing magnetic field emission to the outside and preventing interference with other components outside the magnetic freshness-keeping device 20 (e.g., magnetization of other components). The first and second flux focusing plates 321 and 322 and the magnetic conductive belt 323 are made of silicon steel or a similar material.

[0058] The first magnetic flux focusing plate 321 and the second magnetic flux focusing plate 322 respectively cover the top and bottom of the freshness-preserving space 23, thereby expanding the coverage area of ​​the magnetic field and making the magnetic field more uniform.

[0059] The first magnetic member 311 and the second magnetic member may be electromagnetic coils wound around each other, and may be circular, elliptical, or rectangular in shape, with a flat plate-like shape, with both flat top and bottom surfaces and a thickness significantly smaller than the perimeter. The wrap-around air duct can remove heat generated by the magnetic field assembly and reduce the temperature impact on the freshness-keeping space 23.

[0060] Alternatively, the magnetic field assembly in this embodiment may use permanent magnets as the magnetic field elements, for example, magnetic plates made of permanent magnets may be placed at the top and bottom of the drawer, or an electromagnetic coil and a permanent magnet may be combined to generate a magnetic field by superimposing the two.

[0061] The magnetic field contributes to improving the quality of stored food, shortening freezing time, reducing juice and nutrient loss, reducing the number of microorganisms and bacteria, and extending the freshness-keeping cycle. Magnetic freshness-keeping device 20 is configured to form a wrap-around air duct that directs air from air inlet 231 through top wall 221 of case 22, front baffle 215 of drawer 21, and the space below the bottom plate of the drawer, before returning to return air vent 232, thereby cooling freshness-keeping space 23. The magnetic field and temperature control work together to cool freshness-keeping space 23 using the wrap-around air duct, and the cold air instantly removes heat generated by the operation of the electromagnetic coil, preventing temperature fluctuations in freshness-keeping space 23. The combined effects of temperature and magnetic field improve the freshness-keeping effect of food in freshness-keeping space 23.

[0062] Although the technical solutions of the present invention have been described above in conjunction with the above-mentioned embodiments, those skilled in the art should understand that the protection scope of the present invention is not limited to these specific embodiments. As long as it does not deviate from the technical principle of the present invention, those skilled in the art can disassemble and combine the technical solutions in the above-mentioned embodiments, and make equivalent modifications or substitutions to the related technical features. Any modifications, equivalent substitutions, and improvements made within the technical idea and / or technical principle of the present invention shall all be included in the protection scope of the present invention.

Claims

1. A storage body having a storage chamber defined therein and a cooling air duct formed at the rear of the storage chamber for supplying a cooling air flow; and a magnetic freshness preservation device disposed in the storage chamber and having a magnetic field assembly for applying a magnetic field to a freshness preservation space therein, wherein the magnetic freshness preservation device comprises: a case provided at its rear with an air inlet and a return air port communicating with the cooling air duct; a drawer that is disposed in the case so as to be able to be drawn out and defines the freshness-preserving space therein; The magnetic freshness preservation device is configured to cool the freshness preservation space by forming a wrap-around air duct such that air flows from the air inlet through the top wall of the case, the front baffle of the drawer, and the space below the bottom plate of the drawer in this order and then returning to the return air duct; The top wall of the case comprises: a drawer top cover facing the top opening of the drawer; a housing plate disposed above the drawer top cover and spaced apart from the drawer top cover by a first distance; a top insulation plate disposed within the first interval, the space between the top insulation plate and the drawer top cover defining a top zone of the wraparound air duct passing through the top wall of the case; A plurality of through holes are provided in the drawer top cover, and the freshness preservation space and the top zone are connected to each other using the through holes; The front baffle of the drawer is A central partition plate, an air duct member disposed on a side of the central partition plate facing the freshness-keeping space, the air duct member defining, together with the central partition plate, a front zone of the wraparound air duct passing through the front baffle, the top of the air duct member communicating with the front baffle air inlet of the top zone; A refrigeration apparatus equipped with a magnetic freshness preservation device, including a panel arranged on the opposite side of the central partition plate from the freshness preservation space, and having an air insulation space formed between it and the central partition plate.

2. A freezer equipped with a magnetic freshness-preserving device as described in claim 1, wherein a plurality of air guide ribs are provided on the side of the top insulation plate facing the drawer top cover, and the air guide ribs are used to straighten the air flow in the top zone so that the air flow passes through the top zone uniformly.

3. the magnetic field assembly includes a first focusing flux plate and a first magnetic member disposed on the drawer top cover; The refrigeration apparatus equipped with the magnetic freshness preservation device according to claim 1, wherein the entire first magnetic member is flat and attached to the first flux concentrating plate.

4. the magnetic field assembly includes a second magnetic flux focusing plate and a second magnetic member disposed on the bottom wall of the case, the second magnetic member being flat and attached to the second magnetic flux focusing plate; The first and second focusing flux plates are disposed opposite to each other, and the magnetic field assembly includes:

4. A freezer equipped with the magnetic freshness-preserving device of claim 3, including a magnetic conductive belt disposed on a side wall of the case, connecting the first focusing magnetic flux plate and the second focusing magnetic flux plate to form a circular magnetic path around the drawer.

5. 4. A freezer equipped with a magnetic freshness preservation device as described in claim 3, further comprising a first temperature detection element and a second temperature detection element, each of which is disposed on the top cover of the drawer, the first temperature detection element being disposed near the air inlet, and the second temperature detection element being disposed on the front baffle near the drawer.

6. The top wall of the case is an air guide member disposed at the front end of the top wall of the case, the air guide member having a first air guide port at its rear that communicates with the front end of the top zone, the bottom of the air guide member facing the air inlet of the front baffle and having a second air guide port that communicates with the front baffle air inlet, and guiding the air flow of the top zone to the front zone; 2. The freezer equipped with a magnetic freshness-preserving device according to claim 1, wherein the bottom of the air guide member and the top of the air duct member are each provided as an inclined surface that slopes downward from the front to the rear.

7. a bottom plate of the drawer is spaced apart from a bottom wall of the case, and the lower space is defined as a bottom zone of the wraparound air duct; 2. A freezer equipped with a magnetic freshness-preserving device as described in claim 1, wherein a front baffle air outlet is provided at a position opposite the bottom end of the air duct member at the front of the bottom plate of the drawer, and the front baffle air outlet is used to communicate with the bottom zone.

8. The rear wall of the case is disposed opposite to and spaced apart from the rear of the storage chamber, and the return air opening is provided in a central portion of the rear wall, 2. A freezing apparatus equipped with a magnetic freshness preservation device according to claim 1, wherein the top end of the rear wall forms an inclined surface extending at an angle toward the rear end of the top wall of the case, and the air inlet is provided on the inclined surface.

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