Freshness preservation device and air-cooled cooling equipment using a magnetic field to prevent direct impact of cold air

Abstract

The present invention provides a freshness preservation device using a magnetic field to prevent direct impact of cold air. The freshness preservation device using a magnetic field to prevent direct impact of cold air is applied to an air-cooled cooling device. The freshness preservation device using a magnetic field includes a drawer container, a drawer, a magnetic field unit, an air duct unit, and a return air port. The drawer container has an opening on the front side, the drawer is slidably attached in the drawer container, the magnetic field unit supplies a magnetic field to the stored items in the drawer, the air duct unit is configured so that the cold air enters the drawer container after cooling the magnetic field unit, and does not directly impact the stored items, and the return air port is formed in the drawer container and exhausts the air in the drawer container. In the magnetic field freshness preservation device, the cold air can cool the magnetic field unit and also prevent the cold air from directly impacting the stored items in the drawer, thereby improving the usage experience of the refrigerator, especially the smart refrigerator, to avoid the situation where the stored items are frozen.

Description

[Technical field]

[0001] The present invention relates to the technical field of food freshness preservation, and specifically provides a freshness preservation device and air-cooled cooling equipment that use a magnetic field to prevent direct impact of cold air. [Background technology]

[0002] Theoretical studies have found that magnetic fields can significantly affect the formation of ice crystals during the freezing process, thereby lowering the freezing temperature of food ingredients.

[0003] In order to prevent food from freezing while maintaining freshness at low temperatures, some manufacturers now provide cooling equipment (e.g., refrigerators) with electromagnetic coils that supply a magnetic field to food inside the cooling equipment via the electromagnetic coils.

[0004] However, the coil generates heat during use, which affects the refrigeration effect of the food. In addition, conventional air-cooled cooling devices generally direct cold air from the main air duct in the backboard to the drawer, causing the cold air to directly hit the food. Even after a long time, the food is still frozen, and the effect of keeping the food fresh without freezing cannot be achieved. Summary of the Invention [Problem to be solved by the invention]

[0005] One object of the present invention is to provide a freshness-preserving device that uses a magnetic field and an air-cooled cooling appliance that prevents cold air from directly hitting food ingredients.

[0006] Another object of the present invention is to prevent the high temperature of the magnetic field unit from affecting the freshness of food ingredients by cooling the magnetic field unit with cold air.

[0007] A further object of the present invention is to allow the cold air to cool the magnetic field unit before cooling the foodstuffs. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a freshness preservation device using a magnetic field for preventing direct impact of cold air, which is applied to an air-cooled cooling device. A drawer container having an opening on the front side; a drawer slidably mounted within said drawer container; a magnetic field unit for applying a magnetic field to the items stored in the drawer; An airflow duct unit configured so that cold air enters the drawer container after cooling the magnetic field unit, so as not to directly hit the stored items; and a return air port formed in the drawer container for discharging air from within the drawer container.

[0009] Preferably, the magnetic field unit is located outside the extraction vessel, and the magnetic field unit includes a top coil located on the top side of the extraction vessel and a bottom coil located on the bottom side of the extraction vessel.

[0010] Preferably, the airflow duct unit includes a top air guide plate and a bottom air guide plate, the top air guide plate is disposed on an outer side of the top coil, and a top air passage is formed between the top air guide plate and a top wall of the drawer container, the top air passage being in communication with the drawer container; The bottom air guide plate is disposed to cover the outside of the bottom coil, and a bottom air passage is formed between the bottom air guide plate and a bottom wall of the drawer container, and the bottom air passage is connected to the drawer container.

[0011] Preferably, the exhaust opening of the top air duct is aligned with the front end cover of the drawer, such that the top air duct blows cool air towards the front end cover and then returns the cool air into the drawer, and / or the exhaust opening of the bottom air duct is formed in the bottom wall of the drawer container, such that cool air is blown through the exhaust opening of the bottom air duct to the bottom wall of the drawer.

[0012] Preferably, the air flow duct unit further includes a side air guide plate arranged on at least one side of the drawer container, a side air passage is formed between the side air guide plate and a side wall of the drawer container, the side air passage is connected to the top air passage and / or the bottom air passage, and an exhaust port of the side air passage is formed in the side wall of the drawer container, so that cool air is blown to the side wall of the drawer through the exhaust port of the side air passage.

[0013] Preferably, a plurality of micro-holes are arranged in the top wall of the drawing vessel, the top passage communicates with the drawing vessel through the plurality of micro-holes, and the diameter of the micro-holes is 1 mm or less.

[0014] Preferably, at least a portion of the top wall of the drawer is provided as a woven fabric such that the top passage communicates with the drawer through a slit in the woven fabric.

[0015] Preferably, the air duct unit further includes an air guide duct arranged along a vertical direction, the air guide duct communicating with the top air duct and the bottom air duct, respectively, and the air guide duct directing cool air to the top air duct and the bottom air duct.

[0016] Preferably, the magnetic field freshness preservation device further comprises a Hall sensor and a magnet, one of the Hall sensor and the magnet being attached to the drawer container and the other of the Hall sensor and the magnet being attached to the drawer, the Hall sensor being converted from a triggered state to an untriggered state by the magnet when the drawer is pulled out, and the magnetic field unit being configured to be energized when the Hall sensor is triggered and to be de-energized when the Hall sensor is untriggered.

[0017] Preferably, the magnetic field unit is disposed outside the extraction vessel, the magnetic field unit including a left coil and a right coil, the left coil being disposed on the left side of the extraction vessel and the right coil being disposed on the right side of the extraction vessel; The airflow duct unit includes a left air guide plate and a right air guide plate, the left flow guide plate is disposed to cover an outer side of the left coil, and a left air passage is formed between the left flow guide plate and a left wall of the drawer container, the left air passage being in communication with the drawer container, The right flow guide plate is disposed to cover the outside of the right coil, and a right air passage is formed between the right flow guide plate and a right wall of the drawer container, and the right air passage communicates with the drawer container.

[0018] Preferably, the exhaust opening for the left air duct is formed in the left wall of the drawer container and is aligned with a side panel of the drawer, and / or the exhaust opening for the right air duct is formed in the right wall of the drawer container and is aligned with a side panel of the drawer.

[0019] Preferably, the magnetic field unit is arranged outside the drawer container, the magnetic field unit comprising a front coil and a rear coil, the front coil being arranged in a front end cover of the drawer and the rear coil being arranged in a rear side of the drawer container, The airflow duct unit includes a front flow guide plate and a rear flow guide plate, The front air guide plate is disposed on the outside of the front coil, and a front air passage is formed between the front air guide plate and a front end cover of the drawer, the front air passage being in communication with the drawer container, and The rear flow guide plate is disposed to cover the outside of the rear coil, and a rear air passage is formed between the rear flow guide plate and a rear wall of the drawer container, and the rear air passage communicates with the drawer container.

[0020] The present invention further provides an air-cooled cooling device, comprising the magnetic field freshness preservation device according to any one of the above solutions. Effect of the Invention

[0021] As can be understood by those skilled in the art from the above description, in the solution described above in this invention, the air duct unit is configured so that the cold air enters the drawer container so as not to cool the magnetic field unit before hitting the stored items directly, thereby enabling the cold air to cool the magnetic field unit while also preventing the cold air from hitting the stored items in the drawer (including foodstuffs, medicines, alcoholic beverages, biological reagents, colonies, chemical reagents, etc.) directly, thereby preventing the stored items from freezing.

[0022] As can be further understood by those skilled in the art, if the cold air first passes through the drawer and then cools the magnetic field unit, it will bring moisture in the drawer into the magnetic field unit, causing corrosion in the magnetic field unit. In the present invention, the cold air passes through the magnetic field unit and then flows into the drawer, thus overcoming this problem. In addition, the magnetic field unit can also heat the cold air that is too cold, so as to prevent the cold air from freezing the stored items when it enters the drawer.

[0023] Furthermore, since the magnetic field unit is disposed outside the drawer container, the magnetic field unit is prevented from being scratched or damaged by the sliding drawer. Since the magnetic field unit is configured to include a top coil located on the top side of the drawer container and a bottom coil located on the bottom side of the drawer container, the magnetic field unit can form a magnetic field of uniform strength by the top coil and the bottom coil to provide a good freshness-preserving environment for the stored items in the drawer.

[0024] Furthermore, a top air guide plate is provided on the outside of the top coil, and a top air passage is formed between it and the top wall of the draw-out container, and a bottom air guide plate is provided on the outside of the bottom coil, and a bottom air passage is formed between it and the bottom wall of the draw-out container, so that the top coil and the bottom coil can be cooled in the top air passage and the bottom air passage, respectively.

[0025] Furthermore, by forming an exhaust port of the bottom air duct in the bottom wall of the drawer container, cold air is blown onto the bottom wall of the drawer via the exhaust port of the bottom air duct, thereby preventing the cold air from directly hitting the stored items.

[0026] Furthermore, by aligning the exhaust port of the top air duct with the front end cover of the drawer, the top air duct blows cold air onto the front end cover and then returns the cold air into the drawer, or by arranging a plurality of fine holes in the top wall of the drawer container, the top air duct blows cold air divergently into the drawer container through the plurality of fine holes, or by installing at least a portion of the top wall of the drawer container as woven fabric, the top air duct blows cold air divergently into the drawer container through slits in the woven fabric, thereby avoiding a situation in which the cold air directly hits the stored items.

[0027] Furthermore, by adopting the refrigerator of the technical solution of the present invention, a magnetic field can be formed inside the refrigerator, thereby improving the storage quality of the refrigerator, providing a new freshness-preserving function for the smart refrigerator, meeting the increasing usage demands of users for smart refrigerators, and improving the quality of users' smart families and smart lives.

[0028] Based on the following detailed description of specific embodiments of the present invention with reference to the drawings, those skilled in the art will more clearly understand the above and its objects, advantages and features of the present invention.

[0029] In order to make the solution of the present invention more clearly explained, some embodiments of the present invention will be described hereinafter with reference to the drawings. As can be understood by those skilled in the art, parts or elements designated with the same reference numerals in different drawings are the same or similar, and the drawings of the present invention are not necessarily drawn to scale. [Brief description of the drawings]

[0030] [Figure 1] 1 is a schematic diagram showing the effect of an air-cooling type cooling device in some embodiments of the present invention. [Diagram 2]FIG. 2 is a schematic diagram illustrating the principle of a magnetic field freshness preservation device in some embodiments of the present invention. [Diagram 3] FIG. 2 is a top rear perspective view of a magnetic freshness preservation device according to some embodiments of the present invention. [Figure 4] FIG. 2 is a front top perspective view (with the top guide plate omitted) of a magnetic freshness preservation device according to some embodiments of the present invention. [Diagram 5] FIG. 2 is a front-bottom perspective view (with the bottom guide plate omitted) of a magnetic freshness-preserving device according to some embodiments of the present invention. [Figure 6] FIG. 4 is an isometric side cross-sectional view of the magnetic field freshness preservation device in FIG. 3. [Figure 7] 1 is a schematic diagram showing the effect of a magnetic field-based freshness preservation device in some embodiments of the present invention. [Figure 8] FIG. 8 is a perspective view of the magnetic field unit in FIG. [Figure 9] 10A to 10C are schematic diagrams illustrating the principle of an air duct unit in some other embodiments of the present invention. [Figure 10] 10A to 10C are schematic diagrams illustrating the principle of an air duct unit in still other embodiments of the present invention. [Figure 11] 10A to 10C are schematic diagrams illustrating the principle of an air duct unit in some other embodiments of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] As can be understood by those skilled in the art, the following embodiments are merely some of the embodiments of the present invention, not all of the embodiments of the present invention. The some of the embodiments are intended to interpret the technical principles of the present invention, and are not intended to limit the scope of protection of the present invention. All other embodiments made by those skilled in the art based on the embodiments of the present invention without labor worthy of inventive step should still be included in the scope of protection of the present invention.

[0032] It should be explained that in the description of the present invention, terms indicating directions or positional relationships, such as "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, and are only for ease of description, and do not necessarily indicate or imply that such devices or elements have a particular orientation and are configured or operated in a particular direction, and therefore cannot be understood as limitations on the present invention. Also, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0033] It should be further explained that in the description of the present invention, unless otherwise clearly specified and limited, the terms "attached", "connected" and "connected" should be understood in a broad sense. For example, they may be fixed connections, detachable connections, or integral connections. They may be mechanical connections or electrical connections. They may be directly connected, indirectly connected via an intermediate medium, or internal communication between two elements. Those skilled in the art should be able to understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0034] 1 is a schematic diagram of the effect of an air-cooled cooling device in some embodiments of the present invention. The air-cooled cooling device includes a box 100 and a magnetic field freshness preservation device 200. The magnetic field freshness preservation device 200 is attached to the box 100, and refrigerates and preserves the freshness of stored items (including food ingredients, medicines, alcoholic beverages, biological reagents, colonies, chemical reagents, etc.).

[0035] In the present invention, the air-cooled cooling equipment includes refrigerators, freezers and cold storage cabinets.

[0036] FIG. 2 is a schematic diagram showing the principle of a magnetic freshness preservation device 200 according to some embodiments of the present invention.

[0037] 2, in some embodiments of the present invention, the box 100 includes a cooling chamber 110, an air passage 120, a return air passage 130, and a storage chamber (not shown). The cooling chamber 110 and the storage chamber communicate with each other via the air passage 120 and the return air passage 130 so that air circulates between the cooling chamber 110 and the storage chamber. The magnetic field freshness preservation device 200 is disposed in the storage chamber.

[0038] Furthermore, in some embodiments of the present invention, there may be one or more storage compartments. When there are multiple storage compartments, some of the storage compartments are refrigerator compartments, some of the storage compartments are variable temperature compartments, and some of the storage compartments are freezer compartments. At least one magnetic freshness preservation device 200 is disposed in the variable temperature compartment and / or the freezer compartment.

[0039] 2, in some embodiments of the present invention, the air-cooled cooling device further includes an evaporator 300 and a fan 400. The evaporator 300 is disposed in the cooling chamber 110 and cools the air in the cooling chamber 110. The fan 400 drives the air to circulate through the cooling chamber 110, the air passage 120, the storage chamber, and the return air passage 130 in sequence.

[0040] 2, in some embodiments of the present invention, magnetic field freshness preservation device 200 includes drawer container 210, drawer 220, magnetic field unit 230, and air duct unit 240. Drawer 220 is slidably attached within drawer container 210 and contains stored items. Magnetic field unit 230 provides a magnetic field to the stored items in drawer 220. Air duct unit 240 is configured to allow cold air to enter drawer container 210 after cooling magnetic field unit 230, so as not to directly impinge on the stored items.

[0041] FIG. 3 is a rear-top oblique view of a magnetic freshness preservation device in some embodiments of the present invention, FIG. 4 is a front-top oblique view of a magnetic freshness preservation device in some embodiments of the present invention (with the top flow guide plate omitted), FIG. 5 is a front-bottom oblique view of a magnetic freshness preservation device in some embodiments of the present invention (with the bottom flow guide plate omitted), and FIG. 6 is an isometric side cross-sectional view of the magnetic freshness preservation device in FIG. 3.

[0042] 2 to 6, the front side of the drawer container 210 has an opening 211. The opening 211 allows the drawer 220 to be inserted into the drawer container 210 so that the drawer 220 is slidably attached within the drawer container 210. A return air vent 212 is further provided at the rear side of the drawer container 210, and the return air vent 212 communicates with the return air passage 130, thereby directing air within the drawer container 210 to the return air passage 130. Furthermore, those skilled in the art may provide the return air vent 212 on the left, right, lower or upper side of the drawer container 210 as necessary.

[0043] As shown in FIG. 2, the drawer 220 has a front end cover 221, and when the drawer 220 is slid into the drawer container 210, the front end cover 221 abuts against a front end housing 213 (shown in FIG. 6) of the drawer container 210, and there is a gap between the front end cover 221 and the front end housing 213 of the drawer container 210.

[0044] Fig. 7 is a schematic diagram of the effect of a freshness preservation device using a magnetic field in some embodiments of the present invention, and Fig. 8 is a perspective view of the magnetic field unit in Fig. 7.

[0045] 2 and 4 to 7, the magnetic field unit 230 is disposed outside the drawing container 210, which facilitates fixing and wiring of the magnetic field unit 230. Of course, those skilled in the art may also dispose the magnetic field unit 230 inside the drawing container 210 as necessary.

[0046] 2, 4 to 8, the magnetic field unit 230 includes a top coil 231 located on the top side of the drawing vessel 210 and a bottom coil 232 located on the bottom side of the drawing vessel 210. Preferably, the top coil 231 and the bottom coil 232 are aligned with each other. Furthermore, the magnetic field unit 230 includes a magnetic permeable member 233 and a magnetic permeable connecting member 234. 234 Preferably, a magnetic permeable member 233 is disposed in each of the top coil 231 and the bottom coil 232, and the two magnetic permeable members 233 is a magnetically permeable connecting member 234 More preferably, the top coil 231, the corresponding magnetic permeable member 233, the bottom coil 232 and the corresponding magnetic permeable member 233 can cover the drawer 220 in the direction of the magnetic field. In this way, the stored items at any position in the drawer 220 are located in the magnetic field.

[0047] In the present invention, the magnetically permeable member 233 helps the top coil 231 and the bottom coil 232 to form a magnetic field of uniform strength within the drawer container 210, so that the food in each area of ​​the drawer 220 can be placed in the same magnetic field environment, providing a good magnetic freshness-preserving environment for the stored items in the drawer 220. In addition, the use of the magnetically permeable member 233 makes it easier to control the strength of the magnetic field formed by the top coil 231 and the bottom coil 232, and prevents the magnetic field strength in a local area within the drawer 220 from being too high or too low.

[0048] Further, in the present invention, a magnetically permeable connecting member 234 can at least prevent the magnetic field of the top coil 231 and the bottom coil 232 from leaking to the outside. In other words, it limits the magnetic field generated by the top coil 231 and the bottom coil 232. Specifically, by limiting the magnetic field generated by the top coil 231 and the bottom coil 232 within the drawer container 210, the magnetic field is allowed to act on the stored items in the drawer 220 as much as possible. Therefore, in the present invention, the magnetic permeable member 233 and the magnetic permeable connecting member 234 By using the coils 231 and 232, the utilization of the magnetic fields of the top and bottom coils 231 and 232 is improved.

[0049] It should be noted that the magnetically permeable member 233 and the magnetically permeable connecting member 234 However, it may be any operable magnetically permeable material, such as silicon steel billet, 45 permalloy, 78 permalloy, supermalloy, and the like.

[0050] As shown in Figs. 2 to 4 and 6, airflow duct unit 240 includes top airflow guide plate 241, bottom airflow guide plate 242 and airflow duct 243. Top airflow guide plate 241 is provided to cover the outside of top coil 231, and top airflow duct 250 is formed between top coil 231 and the top wall of drawer container 210. Bottom airflow guide plate 242 is provided to cover the outside of bottom coil 232, and bottom airflow duct 260 is formed between bottom wall of drawer container 210. Airflow duct 243 is fixed to the rear of drawer container 210, and the top of airflow duct 243 has an air intake port, and airflow duct 243 communicates with airflow passage 120 via the air intake port, and airflow duct 243 further communicates with top airflow duct 250 and bottom airflow duct 260, respectively. The air guide duct 243 guides the cool air in the air passage 120 to the top air passage 250 and the bottom air passage 260 .

[0051] On the premise that the cool air in air passage 120 can be guided into top air passage 250 and bottom air passage 260, a person skilled in the art may omit the arrangement of air guide pipe 243 as necessary. For example, top air passage 250 and bottom air passage 260 are directly connected to air passage 120. As an example, magnetic field freshness preservation device 200 further includes a sleeve covering the outside of drawer container 210, top air guide plate 241, and bottom air guide plate 242, the inner cavity of which is connected to top air passage 250 and bottom air passage 260, respectively, and an air intake port connected to air passage 120 is arranged in the sleeve.

[0052] Furthermore, in other embodiments of the present invention, a person skilled in the art may, as necessary, place a damper at the exhaust port of the air supply passage 120 or at the air guide duct 243 (specifically, at a position close to the intake port) and adjust the damper to control whether or not the cold air in the air supply passage 120 flows to the top air duct 250 and the bottom air duct 260, or adjust the damper to control the wind speed at which the cold air in the air supply passage 120 flows to the top air duct 250 and the bottom air duct 260.

[0053] 2 and 6, top air passage 250 also communicates with drawer container 210. Specifically, top air passage 250 has top exhaust port 251, which is aligned with front end cover 221 of drawer 220, such that top air passage 250 blows cool air to front end cover 221 and then returns the cool air into drawer 220. More specifically, top exhaust port 251 is formed in housing 213 at the front end of drawer container 210.

[0054] 2, bottom air passage 260 also communicates with drawer container 210. Specifically, bottom air passage 260 has bottom exhaust port 261, which is formed in the bottom wall of drawer container 210. Bottom air passage 260 blows cool air through bottom exhaust port 261 to the bottom wall of drawer container 220.

[0055] Based on the above description, as can be understood by those skilled in the art, the magnetic field freshness preservation device 200 of the present invention can prevent the cold air from hitting the stored items in the drawer 220 directly, and further prevent the stored items from freezing. In addition, the arrangement of the magnetic field unit 230 allows the magnetic field generated by the magnetic field unit 230 to have a large effect on the formation of ice crystals during the freezing process, thereby reducing the freezing temperature of the stored items. In this way, it is acceptable that the stored items are not frozen and can be preserved at a lower temperature. Therefore, the air-cooled cooling device and magnetic field freshness preservation device 200 of the present invention can effectively prevent the stored items from freezing.

[0056] FIG. 9 is a schematic diagram showing the principle of an air passage unit 240 according to some other embodiments of the present invention.

[0057] In some other embodiments of the present invention, the airflow duct unit 240 further includes a side air guide plate 244 disposed on at least one side of the drawer receptacle 210 . 9, a side air guide plate 244 is preferably disposed on both the left and right sides of drawer container 210. A side air passage 270 is formed between side air guide plate 244 and the side wall of drawer container 210, and side air passage 270 communicates with top air passage 250 and / or bottom air passage 260. Furthermore, side air passage 270 has a side exhaust port 271, which is formed in the side wall of drawer container 210, so that side air passage 270 blows cool air to the side wall of drawer 220 via side exhaust port 271.

[0058] FIG. 10 is a schematic diagram showing the principle of an air duct unit in still other embodiments of the present invention.

[0059] In some further embodiments of the present invention, the magnetic field unit 230 is disposed outside the extraction vessel 210, and the magnetic field unit 230 includes a left coil 235 and a right coil 236, the left coil 235 being disposed on the left side of the extraction vessel 210 and the right coil 236 being disposed on the right side of the extraction vessel 210.

[0060] Furthermore, air blowing duct unit 240 includes a left flow guide plate 245 and a right flow guide plate 246. Left flow guide plate 245 is provided to cover the outside of left coil 235, and a left air passage 280 is formed between left side wall 214 of drawer container 210 and left side air passage 280 communicates with drawer container 210. Right flow guide plate 246 is provided to cover the outside of right coil 236, and a right air passage 290 is formed between right side wall 215 of drawer container 210 and right side air passage 290 communicates with drawer container 210.

[0061] Preferably, left air passage 280 has a left air intake 281 and a left air exhaust 282, and cool air enters left air passage 280 from first air intake 281 and flows out from left air passage 280 via left air exhaust 282. Left air exhaust 282 is formed in left wall 214 of drawer container 210 and aligned with the side panel of drawer 220, so that left air passage 280 blows cool air through left air exhaust 282 to the side panel of drawer 220. In this way, it is possible to prevent the cool air from directly hitting the items stored in drawer 220.

[0062] More preferably, right air passage 290 includes right air intake 291 and right air exhaust 292, and cool air enters right air passage 290 from second air intake 291 and flows out from right air passage 290 via right air exhaust 292. Right air exhaust 292 is formed in right wall 215 of drawer container 210 and aligned with the side panel of drawer 220, so that right air passage 290 blows cool air against the side panel of drawer 220 via right air exhaust 292. In this way, it is possible to prevent the cool air from directly hitting items stored in drawer 220.

[0063] Preferably, the air passage unit 240 further includes an air duct having one intake port and two exhaust ports, the air duct communicating with the air passage 120 via the intake port, and the air duct communicating with the left intake port 281 and the right intake port 291 via the two exhaust ports, respectively.

[0064] Those skilled in the art may also use magnetically permeable members provided in the left coil 235 and the right coil 236, if desired, to allow the left coil 235 and the right coil 236 to form a magnetic field of uniform strength within the drawer container 210. In this way, a balanced magnetic freshness-preserving environment is provided for the stored items within the drawer 220.

[0065] Furthermore, those skilled in the art may, if necessary, provide a magnetically permeable connecting member to the magnetically permeable members corresponding to the left coil 235 and the right coil 236, and connect the two magnetically permeable members through the magnetically permeable members. The combination of the magnetically permeable members and the magnetically permeable connecting member can confine the magnetic field generated by the left coil 235 and the right coil 236 to within the drawer container 210. In this way, the magnetic field is allowed to act on the stored items in the drawer 220 as much as possible. Therefore, in the present invention, the use rate of the magnetic field between the left coil 235 and the right coil 236 is improved by providing the magnetically permeable members and the magnetically permeable connecting member.

[0066] FIG. 11 is a schematic diagram showing the principle of an air duct unit in some other embodiments of the present invention.

[0067] In some other embodiments of the invention, the magnetic field unit 230 is located outside the drawer container 210. The magnetic field unit 230 includes a front coil 237 and a rear coil 238, where the front coil 237 is located at the front end cover 221 of the drawer 220 and the rear coil 238 is located at the rear side of the drawer container 210.

[0068] Furthermore, the air blowing passage unit 240 includes a front flow guide plate 247, a rear flow guide plate 248, and a guide pipe 249. The front flow guide plate 247 is provided to cover the outside of the front coil 237, and a front air passage 2110 is formed between the front flow guide plate 247 and the front end cover 221 of the drawer 220. The rear flow guide plate 248 is provided to cover the outside of the rear coil 238, and a rear air passage 2120 is formed between the rear wall of the drawer container 210.

[0069] Furthermore, the front air passage 2110 and the rear air passage 2120 communicate with the air passage 120 via a guide pipe 249 .

[0070] Furthermore, the front end cover 221 of the drawer 220 is further provided with a first guide passage (indicated by a double dashed line at the upper part of the front end cover 221 in FIG. 11) for connecting the front air passage 2110 to the guide tube 249, and the front end cover 221 is further provided with a second guide passage (indicated by a double dashed line at the lower part of the front end cover 221 in FIG. 11) for connecting the front air passage 2110 to the inner cavity of the drawer container 210. An exhaust port is provided in the front wall of the rear air passage 2120. The return air port 212 is preferably provided in the left wall, right wall or top wall of the drawer container 210.

[0071] In the embodiment shown in FIG. 11 , due to the action of guide tube 249, part of the cool air supplied from air passage 120 flows into front air passage 2110 to cool front coil 237 and enter drawer container 210, and the other part flows into rear air passage 2120 to cool rear coil 238 and enters drawer container 210.

[0072] Although the technical solution of the present invention has been described above using several embodiments, it is easily understood by those skilled in the art that the scope of protection 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 may divide or combine the technical solutions in the above embodiments, and may make equivalent modifications or replacements to the relevant technical features. Any modifications, equivalent replacements, improvements, etc. made within the technical idea and / or technical principle of the present invention are all included in the scope of protection of the present invention.

Claims

1. A freshness preservation device using a magnetic field to prevent direct impact of cold air, which is applied to an air-cooled cooling device, The freshness preservation device using a magnetic field is A drawer container having an opening on the front side; a drawer slidably mounted within said drawer container; a magnetic field unit for applying a magnetic field to the items stored in the drawer; An airflow duct unit configured so that cold air enters the drawer container after cooling the magnetic field unit, so as not to directly hit the stored items; a return air port formed in the drawer container for discharging air from within the drawer container; the magnetic field unit is disposed outside the extraction vessel; The magnetic field unit includes a top coil located on the top side of the extraction vessel and a bottom coil located on the bottom side of the extraction vessel, The airflow duct unit includes a top air guide plate and a bottom air guide plate, the top air guide plate is disposed on an outer side of the top coil, and a top air passage is formed between the top air guide plate and a top wall of the drawer container, the top air passage being in communication with the drawer container; The bottom air guide plate is arranged to cover the outside of the bottom coil, and a bottom air duct is formed between the bottom coil and the bottom wall of the drawer container, and the bottom air duct is a freshness-preserving device that uses a magnetic field to prevent direct impact of cold air connected to the drawer container.

2. and / or the exhaust port of the top duct is aligned with a front end cover of the drawer such that the top duct blows cool air into the front end cover and also blows cool air back into the drawer; and / or A freshness-preserving device using a magnetic field to prevent direct impact of cold air, as described in claim 1, wherein the exhaust port of the bottom air duct is formed in the bottom wall of the drawer container, so that cold air is blown onto the bottom wall of the drawer through the exhaust port of the bottom air duct.

3. The freshness-preserving device using a magnetic field to prevent direct impact of cold air as described in claim 1, wherein the air flow duct unit further includes a side air guide plate arranged on at least one side of the drawer container, a side air passage is formed between the side air guide plate and a side wall of the drawer container, the side air passage is connected to the top air passage and / or the bottom air passage, and an exhaust port of the side air passage is formed in the side wall of the drawer container, thereby blowing cold air against the side wall of the drawer through the exhaust port of the side air passage.

4. The air duct unit further includes an air guide duct arranged along the vertical direction, the air guide duct communicating with the top air duct and the bottom air duct, respectively, and the air guide duct directs cold air to the top air duct and the bottom air duct.A freshness preservation device using a magnetic field to prevent direct impact of cold air as described in claim 1.

5. the magnetic field unit is disposed outside the extraction vessel, the magnetic field unit includes a left coil and a right coil, the left coil is disposed on the left side of the extraction vessel, and the right coil is disposed on the right side of the extraction vessel; The airflow duct unit includes a left air guide plate and a right air guide plate, the left flow guide plate is disposed to cover an outer side of the left coil, and a left air passage is formed between the left flow guide plate and a left wall of the drawer container, the left air passage being in communication with the drawer container, The right-side flow guide plate is provided to cover the outside of the right-side coil, and a right-side air passage is formed between the right-side flow guide plate and the right-side wall of the drawer container, and the right-side air passage is connected to the drawer container.A freshness-preserving device using a magnetic field to prevent direct impact of cold air as described in claim 1.

6. the left air passage exhaust port is formed in the left wall of the drawer container and is aligned with a side panel of the drawer; and / or 6. A freshness-preserving device using a magnetic field to prevent direct impact of cold air as described in claim 5, wherein the exhaust port of the right-side air passage is formed in the right side wall of the drawer container and aligned with the side panel of the drawer.

7. the magnetic field unit is disposed outside the drawer container, the magnetic field unit including a front coil and a rear coil, the front coil being disposed on a front end cover of the drawer, and the rear coil being disposed on a rear side of the drawer container; The airflow duct unit includes a front flow guide plate and a rear flow guide plate, The front air guide plate is disposed on the outside of the front coil, and a front air passage is formed between the front air guide plate and a front end cover of the drawer, the front air passage being in communication with the drawer container, and The rear flow guide plate is provided to cover the outside of the rear coil, and a rear air passage is formed between the rear flow guide plate and the rear wall of the drawer container, and the rear air passage is connected to the drawer container.A freshness-preserving device using a magnetic field to prevent direct impact of cold air as described in claim 1.

8. An air-cooled cooling device comprising the magnetic field freshness preservation device according to any one of claims 1 to 7.

9. A freshness preservation device using a magnetic field to prevent direct impact of cold air, which is applied to an air-cooled cooling device, The freshness preservation device using a magnetic field is A drawer container having an opening on the front side; a drawer slidably mounted within said drawer container; a magnetic field unit for applying a magnetic field to the items stored in the drawer; An airflow duct unit configured so that cold air enters the drawer container after cooling the magnetic field unit, so as not to directly hit the stored items; a return air port formed in the drawer container for discharging air from within the drawer container, the magnetic field unit is disposed outside the extraction vessel, the magnetic field unit includes a left coil and a right coil, the left coil is disposed on the left side of the extraction vessel, and the right coil is disposed on the right side of the extraction vessel; The airflow duct unit includes a left air guide plate and a right air guide plate, the left flow guide plate is disposed to cover an outer side of the left coil, and a left air passage is formed between the left flow guide plate and a left wall of the drawer container, the left air passage being in communication with the drawer container, The right-side air guide plate is installed on the outside of the right-side coil, and a right-side air duct is formed between the right-side coil and the right-side wall of the drawer container, and the right-side air duct is a freshness-preserving device that uses a magnetic field to prevent direct impact of cold air connected to the drawer container.

10. A freshness preservation device using a magnetic field to prevent direct impact of cold air, which is applied to an air-cooled cooling device, The freshness preservation device using a magnetic field is A drawer container having an opening on the front side; a drawer slidably mounted within said drawer container; a magnetic field unit for applying a magnetic field to the items stored in the drawer; An airflow duct unit configured so that cold air enters the drawer container after cooling the magnetic field unit, so as not to directly hit the stored items; a return air port formed in the drawer container for discharging air from within the drawer container, the magnetic field unit is disposed outside the drawer container, the magnetic field unit including a front coil and a rear coil, the front coil being disposed on a front end cover of the drawer, and the rear coil being disposed on a rear side of the drawer container; The airflow duct unit includes a front flow guide plate and a rear flow guide plate, The front air guide plate is disposed on the outside of the front coil, and a front air passage is formed between the front air guide plate and a front end cover of the drawer, the front air passage being in communication with the drawer container, and The rear air guide plate is arranged to cover the outside of the rear coil, and a rear air passage is formed between it and the rear wall of the drawer container, and the rear air passage is a freshness-preserving device that uses a magnetic field to prevent direct impact of cold air connected to the drawer container.

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