Magnetic field generating device, fresh-keeping chamber and refrigerator

Abstract

The utility model relates to the technical field of magnetic field preservation, and provides a magnetic field generation device, a preservation chamber and a refrigerator, the magnetic field generation device comprises a soft magnet assembly and a plurality of magnetic field generation assemblies, the magnetic field generation assemblies are used for generating a magnetic field, the soft magnet assembly comprises a plurality of soft magnetic parts, and the magnetic field generation assemblies are installed on the soft magnet assembly; the magnetic field generation assemblies and the soft magnetic parts are alternately arranged at intervals, and the soft magnetic parts can be magnetized to have the polarity opposite to the magnetic poles of the magnetic field generation assemblies, so that a loop with alternate magnetic poles is formed between the adjacent magnetic field generation assemblies and soft magnetic parts, and the soft magnetic parts have the characteristic of high magnetic conductivity; the magnetic lines generated by the magnetic field generation assemblies can be effectively converged and conducted, the magnetic lines are gathered near the magnetic field generation assemblies, divergence and leakage of the magnetic lines are reduced, the utilization rate of the magnetic field is improved, the number of the magnetic field generation assemblies (such as permanent magnets) can be reduced, and cost is reduced.

Description

Technical Field

[0001] The present application belongs to the field of magnetic field preservation technology, and in particular relates to a magnetic field generating device, a preservation chamber and a refrigerator. Background Art

[0002] In related technologies, magnetic field generating devices usually use permanent magnets to generate magnetic fields to preserve food. In order to maintain a certain magnetic field strength and magnetic field space required for food preservation, more permanent magnets need to be arranged in sequence, resulting in low utilization of the magnetic field and high preservation costs. Utility Model Content

[0003] The embodiments of the present application provide a magnetic field generating device, a fresh-keeping compartment, and a refrigerator to solve the problems of low magnetic field utilization and high fresh-keeping costs in existing magnetic field generating devices.

[0004] In a first aspect, an embodiment of the present application provides a magnetic field generating device, comprising:

[0005] A plurality of magnetic field generating components, wherein the magnetic field generating components are used to generate a magnetic field;

[0006] The soft magnetic component includes a plurality of soft magnetic parts. The magnetic field generating component is installed on the soft magnetic component, and the magnetic field generating component and the soft magnetic parts are alternately arranged.

[0007] In some embodiments of the present application, the soft magnetic assembly includes a soft magnetic body, which is formed with multiple mounting grooves and multiple soft magnetic parts. The mounting grooves and the soft magnetic parts are alternately arranged, and the magnetic field generating assembly is correspondingly installed in the mounting grooves.

[0008] In some embodiments of the present application, the magnetizing direction of the magnetic field generating assembly is parallel to the longitudinal direction of the soft magnetic assembly; and / or, the magnetizing direction of each of the magnetic field generating assemblies is the same.

[0009] In some embodiments of the present application, the magnetic field generating assembly includes a first magnet and a second magnet arranged side by side, the directions of the first magnet and the second magnet are parallel to the longitudinal direction of the soft magnetic assembly, and the magnetization direction of the first magnet is opposite to the magnetization direction of the second magnet.

[0010] In some embodiments of the present application, the magnetic field generating assembly includes a third magnet, a fourth magnet and a fifth magnet arranged side by side, the third magnet and the fifth magnet are respectively located on both sides of the fourth magnet, the magnetization direction of the fourth magnet is parallel to the longitudinal direction of the soft magnetic assembly, the magnetization directions of the third magnet and the fifth magnet are parallel to the transverse direction of the soft magnetic assembly, and the magnetization directions of the third magnet and the fifth magnet both point to the fourth magnet.

[0011] In some embodiments of the present application, the magnetic field generating assembly includes a sixth magnet, a seventh magnet and an eighth magnet arranged side by side, the sixth magnet and the eighth magnet are respectively located on both sides of the seventh magnet, the magnetization direction of the seventh magnet is parallel to the longitudinal direction of the soft magnetic assembly, the magnetization directions of the sixth magnet and the eighth magnet are oblique, and the magnetization directions of the sixth magnet and the eighth magnet both point above the seventh magnet.

[0012] In some embodiments of the present application, at least one of the magnetic poles of the magnetic field generating assembly is provided with an anti-foolproof coating; and / or, at least one of the magnetic poles of the magnetic field generating assembly is provided with an anti-foolproof notch.

[0013] In some embodiments of the present application, the magnetic field generating assembly includes at least one of a permanent magnet and a magnetic excitation coil; and / or the width of the magnetic field generating assembly is equal to the width of the soft magnetic part.

[0014] In a second aspect, an embodiment of the present application further provides a fresh-keeping compartment, which includes the magnetic field generating device as described in any of the above embodiments.

[0015] In a third aspect, an embodiment of the present application further provides a refrigerator, wherein the freshness preservation device includes the magnetic field generating device as described in the above embodiment.

[0016] The magnetic field generating device provided in the embodiment of the present application includes a soft magnetic component and multiple magnetic field generating components. The magnetic field generating component is used to generate a magnetic field. The soft magnetic component includes multiple soft magnetic parts. The magnetic field generating component is installed on the soft magnetic component, and the magnetic field generating component and the soft magnetic part are alternately arranged. The soft magnetic part will be magnetized to a polarity opposite to the magnetic pole of the magnetic field generating component, thereby forming a loop with alternating magnetic poles between adjacent magnetic field generating components and soft magnetic parts. The soft magnetic part has the characteristic of high magnetic permeability and can effectively converge and conduct the magnetic lines of force generated by the magnetic field generating component, gather the magnetic lines of force near the magnetic field generating component, reduce the divergence and leakage of the magnetic lines of force, improve the utilization rate of the magnetic field, and can reduce the number of magnetic field generating components (such as permanent magnets) and reduce costs.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0019] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0020] Figure 1 Schematic diagram of the structure of the magnetic field generating device provided in the embodiment of the present application Figure 1 .

[0021] Figure 2 A schematic cross-sectional view of a magnetic field generating device provided in an embodiment of the present application.

[0022] Figure 3 Schematic diagram of the structure of the magnetic field generating device provided in the embodiment of the present application Figure 2 .

[0023] Figure 4 Schematic diagram of the magnetic field lines of the monopole magnetic pole structure provided in the embodiment of the present application Figure 1 .

[0024] Figure 5 Schematic diagram of the magnetic field lines of the monopole magnetic pole structure provided in the embodiment of the present application Figure 2 .

[0025] Figure 6 Schematic diagram of the magnetic field lines of the heteropolar magnetic pole structure provided in an embodiment of the present application.

[0026] Figure 7 Schematic diagram of the magnetic field lines of the few-magnetic alternating pole structure provided in the embodiment of the present application Figure 1 .

[0027] Figure 8 Schematic diagram of the magnetic field lines of the few-magnetic alternating pole structure provided in the embodiment of the present application Figure 2 .

[0028] Figure 9 Schematic diagram of the arrangement of the magnetic field generating assembly provided in the embodiment of the present application Figure 1 .

[0029] Figure 10 Schematic diagram of the arrangement of the magnetic field generating assembly provided in the embodiment of the present application Figure 2 .

[0030] Figure 11 Schematic diagram of the arrangement of the magnetic field generating assembly provided in the embodiment of the present application Figure 3 .

[0031] Figure 12 This is a graph showing the trend of magnetic induction intensity varying with height for different magnetic pole structures provided in an embodiment of the present application.

[0032] Figure 13 This is a schematic diagram of the structure of the fresh-keeping compartment provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] 10. Magnetic field generating device; 20. Drawer; 100. Magnetic field generating assembly; 101. Permanent magnet; 102. Excitation coil; 110. First magnet; 120. Second magnet; 130. Third magnet; 140. Fourth magnet; 150. Fifth magnet; 160. Sixth magnet; 170. Seventh magnet; 180. Eighth magnet; 200. Soft magnetic assembly; 210. Soft magnetic body; 211. Mounting slot; 212. Soft magnetic part. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0038] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0040] The present invention provides a magnetic field generating device, a fresh-keeping compartment and a refrigerator to solve the problems of low magnetic field utilization and high cost of existing magnetic field generating devices. Figure 1-13 Explain.

[0041] As living standards improve, consumers' demand for food preservation is increasing. To this end, the preservation technologies of various home appliance brands are constantly evolving, from initial temperature and humidity control to modified atmosphere preservation, vacuum preservation, electric field preservation, and magnetic field preservation. Magnetic field preservation utilizes a weak magnetic field to transform disordered water molecules, which have diamagnetic properties, into orderly ones. This reduces biological metabolism and enzyme activity, achieving multiple preservation effects such as high water retention, antioxidant protection, and antibacterial properties.

[0042] Usually, there are two main ways to generate magnetic fields. One is permanent magnets, which use materials that are inherently magnetic to form a magnetic field around them; the other is electromagnets, which use the principle of electromagnetism. Depending on the actual usage, the corresponding solution is selected to generate the magnetic field.

[0043] Some solutions employ permanent magnets, installing magnetic devices on the bottom or sides of the drawer to create an internal magnetic field. Furthermore, magnetic conductive plates are installed to enhance the strength and uniformity of the magnetic field. However, this solution uses a large amount of permanent magnet material, resulting in high costs and a relatively complex structural design, limiting its application in a wider range of products.

[0044] In some schemes, a single-pole magnetic pole structure is used, see Figure 4 and Figure 5 As shown, only one larger permanent magnet is used to generate a magnetic field to preserve food. There is only one polarity on one side, and only magnetic induction is generated perpendicular to the plane and upward. However, the single polarity has the problems of divergence of magnetic lines of force, non-aggregation of the magnetic field, and low magnet utilization.

[0045] In other schemes, the design of the heteropolar magnetic pole structure is adopted, referring to Figure 6As shown, there is magnetic flux coupling between adjacent magnets, which weakens the leakage magnetic field and enhances the magnetic induction intensity inside the drawer. This solves the problem of magnetic flux diffusion and low utilization efficiency of traditional single magnetic sheets, thereby concentrating the magnetic field at the bottom of the fresh-keeping compartment, acting more effectively on the food and improving the preservation effect of the food. However, due to the large number of magnets, the cost is relatively high.

[0046] The magnetic field generating device 10 provided in the embodiment of the present application can be applied to a fresh-keeping compartment, where the fresh-keeping compartment is a fresh-keeping device such as a refrigerator. Figure 13 , Figure 13 This is a structural diagram of a fresh-keeping compartment provided in an embodiment of the present application. The fresh-keeping compartment may include a drawer 20 and a magnetic field generating device 10. The drawer 20 is formed with a storage space for storing food. The magnetic field generating device 10 is located at the bottom of the drawer 20 and is used to generate a magnetic field to preserve the food in the drawer 20.

[0047] According to one embodiment of the present application, Figure 1 、 Figure 2 and Figure 3 As shown, the magnetic field generating device 10 includes a soft magnetic component 200 and multiple magnetic field generating components 100, the magnetic field generating component 100 is used to generate a magnetic field; the soft magnetic component 200 includes multiple soft magnetic parts 212, the magnetic field generating component 100 is installed on the soft magnetic component 200, and the magnetic field generating component 100 and the soft magnetic part 212 are alternately arranged.

[0048] It can be understood that in this embodiment, by alternating the magnetic field generating component 100 and the soft magnetic part 212, and after the soft magnetic part 212 is magnetized to a polarity opposite to the magnetic pole of the magnetic field generating component 100, a loop of alternating magnetic poles is formed, which greatly enhances the continuity and stability of the magnetic field, enables the magnetic lines of force to circulate more effectively near the magnetic field generating device 10, and reduces the leakage and divergence of the magnetic field.

[0049] On the other hand, reference Figure 7 As shown, the soft magnetic portion 212 has high magnetic permeability. The magnetic resistance of the soft magnetic portion 212 is much lower than that of the permanent magnet 101. This effectively gathers and conducts the air gap magnetic flux density between the magnetic lines of force generated by the magnetic field generating assembly 100 without significantly decreasing. This allows the generation of a magnetic field of sufficient strength to act on food, achieving a fresh-keeping effect, while reducing the number of permanent magnets 101. Compared to traditional heteropolar magnetic pole structures, the low-magnetic alternating pole structure significantly reduces material costs by introducing the soft magnetic portion 210 and reducing the number of permanent magnets 101.

[0050] For example, in combination Figure 1-Figure 3 As shown, the magnetic field generating assembly 100 includes at least one of a permanent magnet 101 and a magnetic excitation coil 102 .

[0051] The permanent magnet 101 has the characteristic of maintaining its magnetism for a long time after magnetization. In an optional embodiment, the permanent magnet 101 is primarily composed of a material with high coercivity, high stability, high residual magnetic flux density, and a high maximum magnetic energy product. Examples include rare earth permanent magnets (such as neodymium iron boron and samarium cobalt), metal permanent magnets (such as AlNiCo), ferrite permanent magnets, and rubber magnets. For cost and manufacturability considerations, rubber magnets are preferably used. Rubber magnets are composed of ferrite powder and synthetic rubber, which are then processed and formed into a magnet with a certain degree of flexibility and elasticity.

[0052] In this embodiment, a structure with a few alternating magnetic poles is used. By arranging the soft magnetic part 212 and the permanent magnet 101 in an intermittent manner, the soft magnet 210 itself has no polarity. However, due to its low coercive force and high magnetic permeability, when it comes into contact with the permanent magnet 101, it will be magnetized to a magnetic pole opposite to that of the permanent magnet 101. The magnetic lines of force start from the N pole, pass through the air and the permanent magnet 101, and return to the S pole, thus forming a loop. Although the magnetic poles of the scheme with a few alternating magnetic poles are reduced by more than half compared to the structure with different polarity (a), because its magnetic poles form a loop on the surface, the magnetic lines of force are concentrated at the bottom of the drawer 20, which greatly improves the magnetic induction intensity at the bottom of the drawer 20, and can act more effectively on the food, extending the food preservation effect.

[0053] In another alternative embodiment, magnetic field generating assembly 100 utilizes a magnetic excitation coil 102 wound with a conductive wire. When current flows through the coil, a magnetic field is generated around the coil. Unlike permanent magnet 101, the magnetic field strength and direction of magnetic excitation coil 102 can be precisely controlled by varying the magnitude and direction of the current, facilitating adjustment.

[0054] In an alternative embodiment, in combination Figure 1 and Figure 2 As shown, the soft magnetic assembly 200 includes a soft magnetic body 210 , which is formed with a plurality of mounting grooves 211 and a plurality of soft magnetic parts 212 . The mounting grooves 211 and the soft magnetic parts 212 are alternately arranged, and the magnetic field generating assembly 100 is correspondingly mounted in the mounting grooves 211 .

[0055] In this embodiment, the soft magnetic material 210 is primarily composed of a material with low coercivity and high permeability. When exposed to an external magnetic field, it is easily magnetized, thus becoming magnetic. The soft magnetic material 210 can be made of silicon steel (Fe-Si), permalloy, metallic iron, nanocrystalline materials, Ni-Fe alloys, and the like. For cost and manufacturability considerations, silicon steel or metallic iron are preferred. Optionally, the coercivity of the soft magnetic material 210 ranges from 1 to 1000 A / m, and the permeability ranges from 10^3 to 10^5 H / m.

[0056] The soft magnetic body 210 can be a whole, formed with a plurality of installation grooves 211 and soft magnetic parts 212 arranged alternately in sequence on a soft magnetic body 210. The magnetic field generating component 100, such as the permanent magnet 101, can be embedded and installed in the installation groove 211, thereby realizing connection with the soft magnetic body 210. This installation method reduces the design of fixing structures (such as bolts, clamps, etc.) and is easy to install and disassemble.

[0057] Furthermore, by installing the permanent magnet 101 in the installation groove 211, the contact area between the permanent magnet 101 and the soft magnetic part 212 is increased, the coupling effect of the magnetic field is enhanced, and the leakage and divergence of the magnetic field are reduced. In addition, the permanent magnet 101 and the soft magnet 210 can fit tightly together, the magnetic resistance in the magnetic circuit is significantly reduced, the resistance encountered by the magnetic lines of force during propagation is reduced, magnetic leakage and energy loss are reduced, and a good magnetic field preservation effect is ensured for the fresh-keeping compartment.

[0058] In an alternative embodiment, reference Figure 8 As shown, the magnetization direction of the permanent magnet 101 is parallel to the longitudinal direction (ie, the height direction) of the soft magnetic assembly 200 ; and / or, the magnetization direction of each permanent magnet 101 is the same.

[0059] Exemplarily, the magnetization method of the permanent magnet 101 is longitudinally along the height direction, with the N pole at the top and the S pole at the bottom, or the permanent magnet 101 has the S pole at the top and the N pole at the bottom. The permanent magnet 101 is embedded in the mounting groove 211 of the soft magnet 210 and is arranged alternately with the soft magnetic part 212 (the raised part of the soft magnet 210).

[0060] The magnetic field generating device 10 is usually placed at the bottom of the drawer 20 to keep the food at the bottom of the drawer 20 fresh. By making the magnetizing direction of the permanent magnet 101 parallel to the longitudinal direction, the generated magnetic field can better act on the food at the bottom of the drawer 20, thereby improving the preservation effect of the food.

[0061] Furthermore, the permanent magnets 101 have the same magnetizing direction and cooperate with the soft magnetic part 212 to ensure that the magnetic field generated by the magnetic field generating device 10 is uniform and effective without mutual interference and cancellation, thereby ensuring the preservation effect on food.

[0062] In an alternative embodiment, reference Figure 1 and Figure 9 As shown, the magnetic field generating assembly 100 includes a first magnet 110 and a second magnet 120 arranged side by side. The directions of the first magnet 110 and the second magnet 120 are parallel to the longitudinal direction of the soft magnetic assembly 200, and the magnetization direction of the first magnet 110 is opposite to the magnetization direction of the second magnet 120.

[0063] In this embodiment, the directions of the first magnet 110 and the second magnet 120 are parallel to the longitudinal direction of the soft magnetic assembly 200, and the generated magnetic field can better act on the food at the bottom of the drawer 20, thereby improving the preservation effect of the food. The magnetization direction of the first magnet 110 is opposite to the magnetization direction of the second magnet 120. A closed magnetic line loop can be formed between the first magnet 110 and the second magnet 120, which helps to reduce the leakage of the magnetic field to the external space, enhance the magnetic field strength in the area, maintain the efficiency and stability of the magnetic field generating assembly 100, and improve the preservation effect.

[0064] In an alternative embodiment, reference Figure 1 and Figure 10 As shown, the magnetic field generating assembly 100 includes a third magnet 130, a fourth magnet 140 and a fifth magnet 150 arranged side by side, the third magnet 130 and the fifth magnet 150 are respectively located on both sides of the fourth magnet 140, the magnetizing direction of the fourth magnet 140 is parallel to the longitudinal direction of the soft magnetic assembly 200, the magnetizing directions of the third magnet 130 and the fifth magnet 150 are parallel to the transverse direction (i.e., the horizontal direction) of the soft magnetic assembly 200, and the magnetizing directions of the third magnet 130 and the fifth magnet 150 both point to the fourth magnet 140.

[0065] In this embodiment, each magnetic field generating assembly 100 may include three magnets arranged side by side, and the fourth magnet 140 in the middle is magnetized in the longitudinal direction, and the third magnet 130 and the fifth magnet 150 on both sides are magnetized in the horizontal direction, and the magnetization direction of the third magnet 130 is toward the fourth magnet 140, and the magnetization direction of the fifth magnet 150 is toward the fourth magnet 140. Magnetic lines of force of sufficient strength are generated in both the horizontal and longitudinal directions, further improving the magnetic field preservation effect on the bottom of the food.

[0066] In an alternative embodiment, reference Figure 1 and Figure 11 As shown, the magnetic field generating assembly 100 includes a sixth magnet 160, a seventh magnet 170 and an eighth magnet 180 arranged side by side, the sixth magnet 160 and the eighth magnet 180 are respectively located on both sides of the seventh magnet 170, the magnetizing direction of the seventh magnet 170 is parallel to the longitudinal direction of the soft magnetic assembly 200, the magnetizing directions of the sixth magnet 160 and the eighth magnet 180 are oblique, and the magnetizing directions of the sixth magnet 160 and the eighth magnet 180 both point above the seventh magnet 170.

[0067] Optionally, the magnetization directions of the sixth magnet 160 and the eighth magnet 180 are symmetrically arranged with respect to the longitudinal direction.

[0068] It can be understood that the magnetic circuit design in this embodiment combines the Halbach effect. The magnetization directions of the sixth magnet 160 and the eighth magnet 180 are both oblique (diagonal) and both point above the seventh magnet 170. This specific array of magnets is used to guide the magnetic field lines, so that most of the magnetic field lines are concentrated above the seventh magnet 170, thereby enhancing the magnetic field strength in this area, which is beneficial to improving the magnetic field preservation effect on the food in the drawer 20.

[0069] In an optional embodiment, at least one of the magnetic poles of the magnetic field generating assembly 100 is provided with an anti-foolproof coating; and / or, at least one of the magnetic poles of the magnetic field generating assembly 100 is provided with an anti-foolproof notch (not shown in the figure).

[0070] Exemplarily, the fool-proof coating has obvious colors, textures or markings to distinguish the magnetic pole direction of the permanent magnet 101, thereby avoiding errors during installation or use; a specific shape (such as a groove, protrusion, etc.) can be engraved or cut on one magnetic pole of the magnetic field generating component 100 to distinguish the magnetic pole from other magnetic poles to ensure the correct installation and use of the magnetic field generating component 100.

[0071] In an alternative embodiment, reference Figure 1 As shown, the width of the magnetic field generating component 100 is equal to the width of the soft magnetic part 212, ensuring that the magnetic lines of force generated by the magnetic field generating component 100 and the magnetized soft magnetic part 212 are evenly distributed, reducing the distortion of the magnetic field and avoiding affecting the magnetic field preservation effect on food.

[0072] The magnetic field generating device 10 provided in the embodiment of the present application includes a soft magnetic component 200 and multiple magnetic field generating components 100. The magnetic field generating component 100 is used to generate a magnetic field. The soft magnetic component 200 includes multiple soft magnetic parts 212. The magnetic field generating component 100 is installed on the soft magnetic component 200, and the magnetic field generating component 100 and the soft magnetic part 212 are alternately arranged. The soft magnetic part 212 will be magnetized to a polarity opposite to the magnetic pole of the magnetic field generating component 100, thereby forming a loop with alternating magnetic poles between adjacent magnetic field generating components 100 and soft magnetic parts 212. The soft magnetic part 212 has the characteristic of high magnetic permeability and can effectively converge and conduct the magnetic lines of force generated by the magnetic field generating component 100, gather the magnetic lines of force near the magnetic field generating component 100, reduce the divergence and leakage of the magnetic lines of force, improve the utilization rate of the magnetic field, and can reduce the number of magnetic field generating components 100 (such as permanent magnets 101) and reduce costs.

[0073] In an alternative embodiment, reference Figure 12 As shown, it can be seen that:

[0074] When the height from the bottom of the drawer is 0~ha, B heteropolar magnetic pole structure > B few-magnetic alternating pole magnetic pole structure > B single-pole magnetic pole structure;

[0075] When the height from the bottom of the drawer is between ha and hb, B heteropolar magnetic pole structure > B unipolar magnetic pole structure > B few-magnetic alternating pole magnetic pole structure;

[0076] When the height from the bottom of the drawer is greater than hb, B single-pole magnetic pole structure>B heteropolar magnetic pole structure>B few-magnetic alternating-pole magnetic pole structure.

[0077] Compared with the heteropolar magnetic pole structure, the magnetic induction intensity of the few-magnetic alternating-pole magnetic pole structure is always lower than that of the heteropolar magnetic pole structure. This is because the magnetic poles of the few-magnetic alternating-pole magnetic field are reduced by half or more than that of the heteropolar magnetic pole structure, so the magnetic induction intensity is reduced to a certain extent, but the reduction is only about 20-30%, and does not reach 50% or more; this is because although the soft magnet 210 replaces the permanent magnet 101 adjacent to the heteropolar magnetic pole structure, the magnetic resistance of the soft magnet 210 is much smaller than that of the permanent magnet 101, so the air gap flux density inside the space will not decrease significantly, and the utilization efficiency of the permanent magnet 101 is improved.

[0078] Compared with the monopole magnetic pole structure, the magnetic induction intensity of the few-magnetic alternating-pole magnetic pole structure is higher than that of the monopole magnetic pole structure before point a. This is because the monopole magnetic pole structure has the problems of divergent magnetic lines, non-aggregation of the magnetic field, and low magnet utilization rate, while the few-magnetic alternating-pole magnetic pole structure forms a loop on the surface, so the magnetic lines are concentrated at the bottom of the drawer 20, which greatly increases the magnetic induction intensity at the bottom of the drawer 20; but as the height gradually increases (>point a), the magnetic induction intensity gradually weakens. At this time, the magnetic induction intensity of the monopole magnetic pole structure is higher than that of the few-magnetic alternating-pole magnetic pole structure.

[0079] In summary, the magnetic field generating device 10 of the few-pole alternating-pole magnetic structure design in this embodiment has high utilization rate, small quantity and low cost; compared with the heteropolar magnetic structure, although the number of magnetic poles in the few-pole alternating-pole magnetic structure is halved, the magnetic resistance in the magnetic circuit is small, so the magnetic flux will not decrease proportionally with the reduction of permanent magnets 101, so that the permanent magnet has the characteristic of high utilization rate; and compared with the single-pole magnetic structure, the magnetic circuit forms a loop, so that the magnetic field is mainly concentrated at the bottom of the drawer 20, which acts more effectively on the food, and the soft magnet 210 can reduce the magnetic leakage at the bottom of the permanent magnet 101, further improving the utilization efficiency of the permanent magnet 101.

[0080] In the second aspect, the embodiment of the present application also provides a fresh-keeping compartment, referring to Figure 13 As shown, the fresh-keeping compartment includes the magnetic field generating device 10 as described in the above embodiment. By using the magnetic field generating device 10 of the above embodiment, the food in the fresh-keeping compartment is kept fresh, thereby improving the preservation effect and reducing the preservation cost.

[0081] On the third aspect, an embodiment of the present application further provides a refrigerator, which includes the above-mentioned fresh-keeping compartment. The fresh-keeping compartment of the above-mentioned embodiment is used to keep the food in the refrigerator fresh, thereby improving the preservation effect and reducing the preservation cost.

[0082] It can be understood that the magnetic field generating device 10 has the beneficial effects of the above embodiment, and the fresh-keeping compartment and the refrigerator also have the beneficial effects of the above embodiment. The specific implementation methods thereof can refer to the above embodiment, which will not be described in detail in this embodiment.

[0083] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] Finally, it should be noted that the above embodiments are intended only to illustrate the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present application do not depart from the spirit and scope of the technical solutions of the present application and are intended to be covered by the scope of protection of the present application.

Claims

1. A magnetic field generating device, characterized in that: include: A plurality of magnetic field generating components (100), wherein the magnetic field generating components (100) are used to generate a magnetic field; A soft magnetic assembly (200) includes a plurality of soft magnetic parts (212), the magnetic field generating assembly (100) is mounted on the soft magnetic assembly (200), and the magnetic field generating assembly (100) and the soft magnetic parts (212) are alternately arranged.

2. The magnetic field generating device according to claim 1, characterized in that The soft magnetic assembly (200) includes a soft magnetic body (210), wherein the soft magnetic body (210) is formed with a plurality of mounting grooves (211) and a plurality of soft magnetic parts (212), wherein the mounting grooves (211) and the soft magnetic parts (212) are alternately arranged, and the magnetic field generating assembly (100) is correspondingly mounted in the mounting grooves (211).

3. The magnetic field generating device according to claim 1, characterized in that The magnetization direction of the magnetic field generating assembly (100) is parallel to the longitudinal direction of the soft magnetic assembly (200); and / or, the magnetization direction of each magnetic field generating assembly (100) is the same.

4. The magnetic field generating device according to claim 1, characterized in that The magnetic field generating assembly (100) comprises a first magnet (110) and a second magnet (120) arranged side by side, wherein the directions of the first magnet (110) and the second magnet (120) are both parallel to the longitudinal direction of the soft magnetic assembly (200), and the magnetization direction of the first magnet (110) is opposite to the magnetization direction of the second magnet (120).

5. The magnetic field generating device according to claim 1, characterized in that: The magnetic field generating assembly (100) comprises a third magnet (130), a fourth magnet (140) and a fifth magnet (150) arranged side by side, wherein the third magnet (130) and the fifth magnet (150) are respectively located on both sides of the fourth magnet (140), the magnetizing direction of the fourth magnet (140) is parallel to the longitudinal direction of the soft magnetic assembly (200), the magnetizing directions of the third magnet (130) and the fifth magnet (150) are parallel to the transverse direction of the soft magnetic assembly (200), and the magnetizing directions of the third magnet (130) and the fifth magnet (150) both point to the fourth magnet (140).

6. The magnetic field generating device according to claim 1, characterized in that: The magnetic field generating assembly (100) comprises a sixth magnet (160), a seventh magnet (170) and an eighth magnet (180) arranged side by side, the sixth magnet (160) and the eighth magnet (180) being located on both sides of the seventh magnet (170), respectively, the magnetizing direction of the seventh magnet (170) being parallel to the longitudinal direction of the soft magnetic assembly (200), the magnetizing directions of the sixth magnet (160) and the eighth magnet (180) being oblique, and the magnetizing directions of the sixth magnet (160) and the eighth magnet (180) both pointing above the seventh magnet (170).

7. The magnetic field generating device according to any one of claims 1 to 6, characterized in that: At least one of the magnetic poles of the magnetic field generating assembly (100) is provided with a fool-proof coating; and / or at least one of the magnetic poles of the magnetic field generating assembly (100) is provided with a fool-proof notch.

8. The magnetic field generating device according to any one of claims 1 to 6, characterized in that: The magnetic field generating assembly (100) includes at least one of a permanent magnet (101) and a magnetic excitation coil (102); And / or, the width of the magnetic field generating component (100) is equal to the width of the soft magnetic portion (212).

9. A fresh-keeping compartment, characterized in that: The fresh-keeping compartment includes the magnetic field generating device according to any one of claims 1-8.

10. A refrigerator, characterized in that: The refrigerator includes the fresh-keeping compartment according to claim 9.

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