Magnetic field fresh-keeping refrigerator

Abstract

The utility model provides a magnetic field fresh-keeping refrigerator which comprises a refrigerator body provided with a magnetic field fresh-keeping space. The at least one permanent magnet sheet is attached to the magnetic field fresh-keeping space and at least covers part of the magnetic field fresh-keeping chamber so as to generate a magnetic field acting on the magnetic field fresh-keeping space; the ratio of the sum of the thicknesses of all the permanent magnet pieces to the size of the magnetic field fresh-keeping space in the covering direction of the permanent magnet pieces is larger than or equal to 0.008 and smaller than or equal to 0.1. The food materials stored in the magnetic field fresh-keeping space can be subjected to the action of the magnetic field in the low-temperature storage process, and therefore the fresh-keeping effect of the food materials at the low temperature is improved. Moreover, under the condition that the magnetic induction intensity of the magnetic field fresh-keeping space meets the required requirement, the proportion of the cost of the permanent magnet sheets in the total cost of the magnetic field module is relatively low and is in a relatively acceptable cost range.

Description

Technical Field

[0001] The utility model relates to the technical field of cold storage, in particular to a magnetic field fresh-keeping refrigerator. Background Art

[0002] As a common household appliance, a refrigerator can store food materials at a low temperature, thereby extending the storage period of the food materials. Although the refrigerator extends the storage period of the food materials, the quality of the food materials after low-temperature storage will inevitably decline to some extent. With continuous research, it is found that a magnetic field has a good auxiliary effect on the low-temperature storage of food materials, which can not only further extend the preservation period of the food materials, but also help to maintain the freshness of the food materials during a longer storage time. Therefore, the refrigerator field is also actively exploring the introduction of a magnetic field into the refrigerator to achieve low-temperature storage under the magnetic field. Summary of the Utility Model

[0003] An object of the utility model is to provide a magnetic field fresh-keeping refrigerator that can achieve magnetic field fresh-keeping and help reduce costs.

[0004] In particular, the utility model provides a magnetic field fresh-keeping refrigerator, including:

[0005] A box body configured with a magnetic field fresh-keeping space; and

[0006] At least one permanent magnet piece, which is arranged in abutment with the magnetic field fresh-keeping space and covers at least part of the magnetic field fresh-keeping space to generate a magnetic field acting on the magnetic field fresh-keeping space;

[0007] The ratio of the total thickness of all the permanent magnet pieces to the size of the magnetic field fresh-keeping space in the covering direction of the permanent magnet pieces is greater than or equal to 0.008 and less than or equal to 0.1.

[0008] Optionally, the box body forms a refrigerating compartment, the magnetic field fresh-keeping space is arranged in the refrigerating compartment, and the ratio of the total thickness of all the permanent magnet pieces to the size of the magnetic field fresh-keeping space in the covering direction of the permanent magnet pieces is greater than or equal to 0.015 and less than or equal to 0.1.

[0009] Optionally, the ratio of the total thickness of all the permanent magnet pieces to the size of the magnetic field fresh-keeping space in the covering direction of the permanent magnet pieces is greater than or equal to 0.04 and less than or equal to 0.07.

[0010] Optionally, the ratio of the total thickness of all the permanent magnet pieces to the magnetic induction intensity at the center point of the magnetic field fresh-keeping space is greater than or equal to 0.05 mm / Gauss and less than or equal to 0.3 mm / Gauss.

[0011] Optionally, the ratio of the total thickness of all the permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space is greater than or equal to 0.12 mm / Gauss and less than or equal to 0.18 mm / Gauss.

[0012] Optionally, the box body is formed with a freezing compartment, the magnetic field preservation space is arranged in the freezing compartment, and the ratio of the total thickness of all the permanent magnet sheets to the dimension of the magnetic field preservation space along the covering direction of the permanent magnet sheets is greater than or equal to 0.008 and less than or equal to 0.04.

[0013] Optionally, the ratio of the total thickness of all the permanent magnet sheets to the dimension of the magnetic field preservation space along the covering direction of the permanent magnet sheets is greater than or equal to 0.015 and less than or equal to 0.03.

[0014] Optionally, the ratio of the total thickness of all the permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space is greater than or equal to 0.05 mm / Gauss and less than or equal to 0.8 mm / Gauss.

[0015] Optionally, the ratio of the total thickness of all the permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space is greater than or equal to 0.15 mm / Gauss and less than or equal to 0.4 mm / Gauss.

[0016] Optionally, the magnetic field preservation refrigerator includes two permanent magnet sheets, and the two permanent magnet sheets are respectively arranged on opposite sides of the magnetic field preservation space.

[0017] In the present utility model, by arranging a magnetic field preservation space in the box body and setting permanent magnet sheets against the magnetic field preservation space, the permanent magnet sheets generate a magnetic field in the magnetic field preservation space. The ratio of the sum of the thicknesses of all the permanent magnet sheets to the dimension of the magnetic field preservation space along the covering direction is greater than or equal to 0.008 and less than or equal to 0.1. Thus, the food materials stored in the magnetic field preservation space can be affected by the magnetic field during low-temperature storage, thereby improving the preservation effect of the food materials at low temperature, that is, helping the food materials to maintain good freshness for a longer time. And, when the magnetic induction intensity of the magnetic field preservation space meets the required requirements, the proportion of the cost of the permanent magnet sheets in the total cost of the magnetic field module is relatively low, within a relatively acceptable cost range.

[0018] Those skilled in the art will understand more clearly the above and other objects, advantages and features of the present utility model from the following detailed description of the specific embodiments of the present utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an illustrative rather than restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0020] Figure 1 is a schematic diagram of a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the refrigerating compartment part of a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0022] Figure 3 is a relationship curve graph of the ratio of the total thickness of permanent magnet sheets to the height of the magnetic field preservation space and the cost of permanent magnet sheets under a certain condition in the refrigerating compartment of a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0023] Figure 4 is a relationship curve graph of the ratio of the total thickness of permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space and the cost of permanent magnet sheets under a certain condition in the refrigerating compartment of a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the freezing compartment part of a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0025] Figure 6 is a relationship curve graph of the ratio of the total thickness of permanent magnet sheets to the height of the magnetic field preservation space and the cost of permanent magnet sheets under a certain condition in the freezing compartment of a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0026] Figure 7 is a relationship curve graph of the ratio of the total thickness of permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space and the cost of permanent magnet sheets under a certain condition in the freezing compartment of a magnetic field preservation refrigerator according to an embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of a magnetic field preservation refrigerator according to another embodiment of the present invention;

[0028] Description of reference numerals:

[0029] 1 - Refrigerator; 100 - Box body; 101 - Magnetic field preservation space; 102 - Refrigerating compartment; 103 - Freezing compartment; 200 - Permanent magnet sheet; 300 - Storage container. Detailed implementation manners

[0030] Those skilled in the art should understand that the embodiments described below are only a part of the embodiments of the present utility model, rather than all the embodiments of the present utility model. These embodiments are intended to explain the technical principles of the present utility model and are not intended to limit the protection scope of the present utility model. Based on the embodiments provided by the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts should still fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] Furthermore, it should be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] As Figure 1 shown, in one embodiment, the refrigerator 1 includes a box body 100 and four permanent magnet pieces 200. The box body 100 is configured with two magnetic field fresh-keeping spaces 101. The permanent magnet pieces 200 are arranged in contact with the magnetic field fresh-keeping spaces 101 and at least cover part of the magnetic field fresh-keeping spaces 101 to generate a magnetic field acting on the magnetic field fresh-keeping spaces 101. Specifically, each magnetic field fresh-keeping space 101 corresponds to two permanent magnet pieces 200, and the two permanent magnet pieces 200 are respectively arranged on the opposite sides of the magnetic field fresh-keeping space 101. For each magnetic field fresh-keeping space 101, the ratio of the total thickness of all the permanent magnet pieces 200 to the size of the magnetic field fresh-keeping space 101 along the covering direction of the permanent magnet pieces 200 is greater than or equal to 0.008 and less than or equal to 0.1.

[0034] Referring to Figure 1As shown, specifically, the cabinet 100 of the refrigerator 1 is formed with a refrigerating compartment 102 and a freezing compartment 103. A magnetic field preservation space 101 is disposed in the refrigerating compartment 102, and two corresponding permanent magnet sheets 200 are arranged in the refrigerating compartment 102. Another magnetic field preservation space 101 is disposed in the freezing compartment 103, and two corresponding permanent magnet sheets 200 are arranged in the freezing compartment 103.

[0035] It should be noted that, in some other embodiments, the number of compartments of the refrigerator can be 1, 3 or more. In the case of 1 compartment, it can be a refrigerating compartment or a freezing compartment. In addition, the distribution of multiple compartments can be longitudinal or transverse. Those skilled in the art can configure the specific number, functions and layout modes of the compartments according to requirements.

[0036] Furthermore, the refrigerator in this embodiment is an air-cooled refrigerator, and an air duct system is also provided in the cabinet. The blower is used to send the refrigerating air flow that has been heat-exchanged by the heat exchanger (evaporator) through the air outlet of the cabinet to the refrigerator compartments, and then return to the refrigerating chamber through the air return opening of the cabinet to achieve circulating air refrigeration. Since the air duct system of such refrigerators is well-known and easy to implement for those skilled in the art, in order not to obscure and blur the inventive points of this application, the air duct system itself will not be described in detail.

[0037] Refer to Figure 1 and Figure 2 As shown, in the refrigerating compartment 102, the two permanent magnet sheets 200 are respectively arranged on the top side and the bottom side of the magnetic field preservation space 101. Specifically, the two permanent magnet sheets 200 are arranged longitudinally in the refrigerating compartment 102, and there is a gap between the two permanent magnet sheets 200. The space between the two permanent magnet sheets 200 is the magnetic field preservation space 101, that is, the space for placing food materials. In other words, the part of the refrigerating compartment 102 between the two permanent magnet sheets 200 is configured as the magnetic field preservation space 101.

[0038] It should be noted that, during actual use, the lower permanent magnet sheet can be directly used as the shelf for placing food materials, or an additional shelf can be provided between the two permanent magnet sheets to place food materials.

[0039] In addition, it should be noted that, in some other embodiments, more than two permanent magnet sheets can also be provided in the compartment serving as the refrigerating compartment, and each pair of permanent magnet sheets is configured as a magnetic field preservation space. That is to say, multiple magnetic field preservation spaces can be provided in one compartment.

[0040] Refer to Figure 1 and Figure 2As shown, preferably, the ratio of the total thickness of all the permanent magnet sheets 200 to the dimension of the magnetic field preservation space 101 in the covering direction of the permanent magnet sheets 200 is greater than or equal to 0.015 and less than or equal to 0.1. The permanent magnet sheets 200 are in a square sheet structure. The surface with the largest area of the permanent magnet sheet 200 faces the magnetic field preservation space 101. The covering direction of the permanent magnet sheets 200 is the direction in which the axis line of the surface with the largest area of the permanent magnet sheet 200 extends, or in other words, the distribution direction of two permanent magnet sheets 200.

[0041] Referring to Figure 2 As shown, the thickness of one permanent magnet sheet 200 is d, and the dimension of the magnetic field preservation space 101 in the covering direction of the permanent magnet sheet 200, that is, the longitudinal dimension of the magnetic field preservation space 101 is D, and 2d / D is greater than or equal to 0.015 and less than or equal to 0.1. Exemplarily, it can be 0.015, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09 or 0.1. When the magnetic induction intensity of the magnetic field preservation space 101 in the refrigerating compartment 102 meets the required requirements, specifically, when the magnetic induction intensity in the magnetic field preservation space 101 in the refrigerating compartment 102 is between 40 Gauss and 50 Gauss, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the dimension of the magnetic field preservation space 101 in the covering direction of the permanent magnet sheets 200 being greater than or equal to 0.015 and less than or equal to 0.1 makes the cost of the permanent magnet sheets 200 relatively low.

[0042] Preferably, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the dimension of the magnetic field preservation space 101 in the covering direction of the permanent magnet sheets 200 is greater than or equal to 0.04 and less than or equal to 0.07. Exemplarily, it can be 0.04, 0.045, 0.05, 0.055, 0.06, 0.065 or 0.07, which can make the cost of the permanent magnet sheets 200 in a lower cost ratio range and further reduce the cost of the permanent magnet sheets 200.

[0043] Referring to Figure 3 As shown, it is a relationship curve graph of the ratio of the total thickness of the permanent magnet sheets 200 in the refrigerating compartment to the height of the magnetic field preservation space 101 and the ratio of the cost of the permanent magnet sheets 200 to the total cost of the magnetic field preservation module under a certain condition. The height of the magnetic field preservation space 101 is the longitudinal dimension of the magnetic field preservation space 101. The total cost of the magnetic field preservation module is the cost of the permanent magnet sheets 200 plus the cost required for the structure such as the installation and fixation of the refrigerator in cooperation with the permanent magnet sheets 200. Since the other costs except the permanent magnet sheets 200 are constant, it can also be regarded as the cost curve of the permanent magnet sheets 200.

[0044] As can be seen from the curve graph, in the refrigerated compartment, when the ratio of the total thickness of the permanent magnet pieces 200 to the height of the magnetic field fresh-keeping space 101 is greater than or equal to 0.015 and less than or equal to 0.1, the cost of the permanent magnet pieces 200 is relatively in a range with a relatively low cost proportion. In the relationship graph under one illustrated condition, it accounts for less than 50% of the total cost. Under different conditions, including different heights of the magnetic field fresh-keeping space or setting the permanent magnet pieces only on one side of the magnetic field fresh-keeping space, the curve of the relationship graph is roughly the same, and the above ratio construction relationship can make the total cost of the permanent magnet pieces in a relatively acceptable cost range. That is to say, when the magnetic induction intensity of the refrigerated compartment meets the required value, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the dimension of the magnetic field fresh-keeping space 101 along the covering direction of the permanent magnet pieces 200 being greater than or equal to 0.015 and less than or equal to 0.1 makes the cost of the permanent magnet pieces 200 relatively low.

[0045] Continue to refer to Figure 3 As shown, when the magnetic induction intensity of the refrigerated compartment meets the required value, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the dimension of the magnetic field fresh-keeping space 101 along the covering direction of the permanent magnet pieces 200 is greater than or equal to 0.04 and less than or equal to 0.07, and the cost of the permanent magnet pieces 200 is in a range with an even lower cost proportion, which further reduces the cost of the permanent magnet pieces 200.

[0046] In a most preferred example, the thickness of each permanent magnet piece 200 is 3.2 millimeters, the total thickness of the permanent magnet pieces 200 is 6.4 millimeters, and the height of the magnetic field fresh-keeping space 101 is 120 millimeters, that is, the ratio of the total thickness of the permanent magnet pieces 200 to the height of the magnetic field fresh-keeping space 101 is 0.053.

[0047] Refer to Figure 1 and Figure 2 As shown, in the refrigerated compartment 102, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the magnetic induction intensity at the center point of the magnetic field fresh-keeping space 101 is greater than or equal to 0.05 millimeters per gauss and less than or equal to 0.3 millimeters per gauss. That is, the unit of the sum of the thicknesses of all the permanent magnet pieces 200 is millimeters, and the unit of the magnetic induction intensity at the center point of the magnetic field fresh-keeping space 101 is gauss. Exemplarily, it can be 0.05, 0.08, 0.1, 0.12, 0.13, 0.15, 0.18, 0.2, 0.22, 0.25, 0.28 or 0.3 millimeters per gauss. The ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the magnetic induction intensity at the center point of the magnetic field fresh-keeping space 101 being greater than or equal to 0.05 millimeters per gauss and less than or equal to 0.3 millimeters per gauss, the cost of the permanent magnet pieces 200 is in a range with a relatively low cost proportion, making the cost of the permanent magnet pieces 200 relatively low.

[0048] Preferably, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.12 mm / Gauss and less than or equal to 0.18 mm / Gauss. Exemplarily, it can be 0.12, 0.13, 0.14, 0.15, 0.16, 0.17 or 0.18 mm / Gauss. The cost of the permanent magnet sheets 200 is in a range with a lower cost ratio, so that the cost of the permanent magnet sheets 200 is further reduced.

[0049] Referring to Figure 4 As shown, it is a relationship curve graph of the ratio of the total thickness of the permanent magnet sheets 200 in the refrigerated chamber to the magnetic induction intensity at the center point of the magnetic field preservation space 101 and the ratio of the cost of the permanent magnet sheets 200 to the total cost of the magnetic field preservation module. When the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.05 mm / Gauss and less than or equal to 0.3 mm / Gauss, the cost of the permanent magnet sheets 200 is relatively in a range with a lower cost ratio, basically less than 50% of the total cost, and at most not exceeding 60%. Under different conditions, the relationship graph curves are roughly the same, and the above ratio construction relationships can all make the total cost of the permanent magnet sheets in a relatively acceptable cost range. In other words, when the magnetic induction intensity of the refrigerated chamber meets the required requirements, specifically, when the magnetic induction intensity in the magnetic field preservation space 101 in the refrigerated chamber is between 40 Gauss and 50 Gauss, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 being greater than or equal to 0.05 mm / Gauss and less than or equal to 0.3 mm / Gauss makes the cost of the permanent magnet sheets 200 relatively low.

[0050] Furthermore, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.12 mm / Gauss and less than or equal to 0.18 mm / Gauss, and the cost of the permanent magnet sheets 200 is further reduced.

[0051] In a most preferred example, the thickness of each permanent magnet sheet 200 is 3.2 mm, the total thickness of the permanent magnet sheets 200 is 6.4 mm, and the magnetic induction intensity at the center point of the magnetic field preservation space 101 is 45 Gauss, that is, the ratio of the total thickness of the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is 0.14 mm / Gauss.

[0052] Referring to Figure 1 and Figure 5As shown, in the freezing compartment 103, two permanent magnet pieces 200 are respectively arranged on the top side and the bottom side of the magnetic field fresh-keeping space 101. Specifically, the two permanent magnet pieces 200 are in the freezing compartment 103 and there is a gap between the two permanent magnet pieces 200. The space between the two permanent magnet pieces 200 is the magnetic field fresh-keeping space 101, that is, the space for placing food materials. In other words, the part of the freezing compartment 103 between the two permanent magnet pieces 200 is configured as the magnetic field fresh-keeping space 101.

[0053] Continue to refer to Figure 1 and Figure 5 As shown, further, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the dimension of the magnetic field fresh-keeping space 101 in the covering direction of the permanent magnet pieces 200 is greater than or equal to 0.008 and less than or equal to 0.04. Refer to Figure 5 As shown, the thickness of one permanent magnet piece 200 is s, and the dimension of the magnetic field fresh-keeping space 101 in the covering direction of the permanent magnet piece 200, that is, the longitudinal dimension of the magnetic field fresh-keeping space 101 is S, and 2s / S is greater than or equal to 0.008 and less than or equal to 0.04. Exemplarily, it can be 0.008, 0.009, 0.01, 0.015, 0.02, 0.025, 0.03, 0.035 or 0.04. When the magnetic induction intensity of the freezing compartment meets the required requirements, specifically, when the magnetic induction intensity in the magnetic field fresh-keeping space 101 in the freezing compartment is between 15 gauss and 20 gauss, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the dimension of the magnetic field fresh-keeping space 101 in the covering direction of the permanent magnet pieces 200 being greater than or equal to 0.008 and less than or equal to 0.04 makes the cost of the permanent magnet pieces 200 relatively low.

[0054] Preferably, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the dimension of the magnetic field fresh-keeping space 101 in the covering direction of the permanent magnet pieces 200 is greater than or equal to 0.015 and less than or equal to 0.03. Exemplarily, it can be 0.015, 0.018, 0.02, 0.022, 0.025, 0.028 or 0.03. When the magnetic induction intensity of the freezing compartment meets the required requirements, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the dimension of the magnetic field fresh-keeping space 101 in the covering direction of the permanent magnet pieces 200 being greater than or equal to 0.015 and less than or equal to 0.03, the cost of the permanent magnet pieces 200 is in a lower cost ratio range, making the cost of the permanent magnet pieces 200 further reduced.

[0055] Refer to Figure 6As shown in the figure, it is a relationship curve graph between the ratio of the total thickness of the permanent magnet pieces 200 in the freezing compartment to the height of the magnetic field preservation space 101 and the ratio of the cost of the permanent magnet pieces 200 to the total cost of the magnetic field preservation module. It can be seen from the curve graph that in the freezing compartment, when the ratio of the total thickness of the permanent magnet pieces 200 to the height of the magnetic field preservation space 101 is greater than or equal to 0.008 and less than or equal to 0.04, the cost of the permanent magnet pieces 200 is relatively in a range with a lower cost proportion, basically less than 50% of the total cost, and at most not exceeding 60%. Under different conditions, the curve of the relationship graph is roughly the same, and the above ratio construction relationships can all make the total cost of the permanent magnet pieces in a relatively acceptable cost range. That is to say, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the dimension of the magnetic field preservation space 101 along the covering direction of the permanent magnet pieces 200 being greater than or equal to 0.008 and less than or equal to 0.04 makes the cost of the permanent magnet pieces 200 relatively low.

[0056] Continue to refer to Figure 6 As shown in the figure, when the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the dimension of the magnetic field preservation space 101 along the covering direction of the permanent magnet pieces 200 is greater than or equal to 0.015 and less than or equal to 0.03, the cost of the permanent magnet pieces 200 is in a range with an even lower cost proportion, which further reduces the cost of the permanent magnet pieces 200.

[0057] In a most preferred example, the thickness of each permanent magnet piece 200 is 2 mm, the total thickness of the permanent magnet pieces 200 is 4 mm, and the height of the magnetic field preservation space 101 is 220 mm, that is, the ratio of the total thickness of the permanent magnet pieces 200 to the height of the magnetic field preservation space 101 is 0.018.

[0058] Refer to Figure 1 and Figure 5 As shown in the figure, in the freezing compartment 103, the ratio of the sum of the thicknesses of all the permanent magnet pieces 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.05 mm / Gauss and less than or equal to 0.8 mm / Gauss. That is, the unit of the sum of the thicknesses of two permanent magnet pieces 200 is mm, and the unit of the magnetic induction intensity at the center point of the magnetic field preservation space 101 is Gauss. Exemplarily, it can be 0.05, 0.08, 0.1, 0.12, 0.13, 0.15, 0.18, 0.2, 0.22, 0.25, 0.28, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75 or 0.8 mm / Gauss. When the ratio of the sum of the thicknesses of two permanent magnet pieces 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.05 mm / Gauss and less than or equal to 0.8 mm / Gauss, the cost of the permanent magnet pieces 200 is relatively in a range with a lower cost proportion.

[0059] Preferably, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.15 mm / Gauss and less than or equal to 0.4 mm / Gauss. Exemplarily, it can be 0.15, 0.17, 0.2, 0.25, 0.3, 0.33 or 0.4 mm / Gauss. The ratio of the sum of the thicknesses of two permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.15 mm / Gauss and less than or equal to 0.4 mm / Gauss, which further reduces the cost of the permanent magnet sheets 200.

[0060] Referring to Figure 7 As shown, it is a relationship curve graph of the ratio of the total thickness of the permanent magnet sheets 200 in the freezer compartment to the magnetic induction intensity at the center point of the magnetic field preservation space 101 and the ratio of the cost of the permanent magnet sheets 200 to the total cost of the magnetic field preservation module under a certain condition. The ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.05 mm / Gauss and less than or equal to 0.8 mm / Gauss, and the cost of the permanent magnet sheets 200 is relatively in a range with a low cost proportion. Under different conditions, the relationship graph curves are roughly the same, and the above ratio construction relationships can all make the total cost of the permanent magnet sheets in a relatively acceptable cost range. In other words, when the magnetic induction intensity of the freezer compartment meets the required requirements, specifically, when the magnetic induction intensity in the magnetic field preservation space 101 in the freezer compartment is between 15 Gauss and 20 Gauss, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 being greater than or equal to 0.05 mm / Gauss and less than or equal to 0.8 mm / Gauss makes the cost of the permanent magnet sheets 200 relatively low.

[0061] Furthermore, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.15 mm / Gauss and less than or equal to 0.4 mm / Gauss, and the cost of the permanent magnet sheets 200 is further reduced.

[0062] In a most preferred example, the thickness of each permanent magnet sheet 200 is 2 mm, the total thickness of the permanent magnet sheets 200 is 4 mm, and the magnetic induction intensity at the center point of the magnetic field preservation space 101 is 16 Gauss, that is, the ratio of the total thickness of the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is 0.25 mm / Gauss.

[0063] In the solution of this embodiment, a magnetic field preservation space 101 is configured in the box body 100, and a permanent magnet sheet 200 is arranged against the magnetic field preservation space 101. The permanent magnet sheet 200 generates a magnetic field in the magnetic field preservation space 101. The ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the size of the magnetic field preservation space 101 in the covering direction is greater than or equal to 0.008 and less than or equal to 0.1. So that the food stored in the magnetic field preservation space 101 can be affected by the magnetic field during the low-temperature storage process, thereby improving the preservation effect of the food at low temperature, that is, it helps to keep the food in a better freshness for a longer time. Specifically, during the freezing process, the magnetic field can limit the free path of water molecules, break the hydrogen bonds in the water molecule clusters, so that the growth of crystal nuclei in the food is inhibited, small ice crystals are generated inside the food, and further reduce the damage caused by ice crystals to the food cells. Therefore, it helps to reduce the juice loss after the food is thawed, thereby reducing the nutrient loss of the food and ensuring the taste of the food. During the refrigeration process, the magnetic field can reduce the supercooling degree of the food, that is, under the condition of applying the magnetic field, the food can be kept in a non-frozen state at a lower temperature. In other words, it can reduce the refrigeration temperature of the food, thereby further reducing the growth of bacteria and helping to preserve the food.

[0064] Moreover, when the magnetic induction intensity of the magnetic field preservation space 101 meets the required requirements, the cost of the permanent magnet sheet 200 accounts for a relatively low proportion in the total cost of the magnetic field module, within a relatively acceptable cost range.

[0065] Specifically, in the refrigerating compartment 102, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the size of the magnetic field preservation space 101 in the covering direction of the permanent magnet sheet 200 is greater than or equal to 0.015 and less than or equal to 0.1. In the freezing compartment 103, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the size of the magnetic field preservation space 101 in the covering direction of the permanent magnet sheet 200 is greater than or equal to 0.008 and less than or equal to 0.04. The ratio of the sum of the thicknesses of the permanent magnet sheets 200 to the size of the magnetic field preservation space 101 in the covering direction of the permanent magnet sheet 200 conforms to the specific requirements of different compartments, so that the cost of the permanent magnet sheet 200 is relatively low while meeting the structural requirements of the corresponding compartments, which is beneficial to reducing the cost of the permanent magnet sheet 200 targeted.

[0066] In addition, in the refrigerating compartment 102, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.05 and less than or equal to 0.3. In the freezing compartment 103, the ratio of the sum of the thicknesses of all the permanent magnet sheets 200 to the magnetic induction intensity at the center point of the magnetic field preservation space 101 is greater than or equal to 0.05 and less than or equal to 0.8. Under the condition of meeting the magnetic field requirements, it is beneficial to reduce the cost of the permanent magnet sheet 200.

[0067] Refer toFigure 1 As shown, in one embodiment, the permanent magnet sheet 200 is a bonded permanent ferrite, and its residual magnetic induction intensity satisfies being greater than or equal to 60 mT and less than or equal to 350 mT, preferably, greater than or equal to 240 mT and less than or equal to 270 mT, so as to meet the magnetic induction intensity requirement in the magnetic field fresh-keeping space 101 under the numerical parameters where the thickness of the permanent magnet sheet 200 and the dimension of the magnetic field fresh-keeping space 101 along the covering direction of the permanent magnet sheet 200 are such that the cost of the permanent magnet sheet 200 is relatively low.

[0068] Furthermore, the coercivity of the permanent magnet sheet 200 is greater than or equal to 50 kA / m and less than or equal to 260 kA / m, preferably, greater than or equal to 150 kA / m and less than or equal to 180 kA / m. The intrinsic coercivity of the permanent magnet sheet 200 is greater than or equal to 50 kA / m and less than or equal to 350 kA / m, preferably, greater than or equal to 190 kA / m and less than or equal to 240 kA / m. The maximum magnetic energy product of the permanent magnet sheet 200 is greater than or equal to 0.8 kJ / m³ and less than or equal to 25 kJ / m³, preferably, greater than or equal to 11 kJ / m³ and less than or equal to 14 kJ / m³.

[0069] Referring to Figure 1 As shown, in another embodiment, the permanent magnet sheet 200 is a sintered permanent ferrite, and its residual magnetic induction intensity satisfies being greater than or equal to 200 mT and less than or equal to 490 mT, preferably, greater than or equal to 370 mT and less than or equal to 390 mT, so as to meet the magnetic induction intensity requirement in the magnetic field fresh-keeping space 101 under the numerical parameters where the thickness of the permanent magnet sheet 200 and the dimension of the magnetic field fresh-keeping space 101 along the covering direction of the permanent magnet sheet 200 are such that the cost of the permanent magnet sheet 200 is relatively low.

[0070] Furthermore, the coercivity of the permanent magnet sheet 200 is greater than or equal to 120 kA / m and less than or equal to 360 kA / m, preferably, greater than or equal to 260 kA / m and less than or equal to 290 kA / m. The intrinsic coercivity of the permanent magnet sheet 200 is greater than or equal to 200 kA / m and less than or equal to 450 kA / m, preferably, greater than or equal to 310 kA / m and less than or equal to 330 kA / m. The maximum magnetic energy product of the permanent magnet sheet 200 is greater than or equal to 6.4 kJ / m³ and less than or equal to 45 kJ / m³, preferably, greater than or equal to 25 kJ / m³ and less than or equal to 29 kJ / m³.

[0071] As Figure 8 shown, in another embodiment, the refrigerator 1 further includes a storage container 300, and the magnetic field fresh-keeping space 101 is formed by the storage container 300. Specifically, the storage container 300 is a drawer, and the internal space of the drawer is the magnetic field fresh-keeping space 101. At this time, the two permanent magnet sheets 200 are disposed approximately in contact with the top side and the bottom side of the drawer.

[0072] It should be noted that in some other embodiments, one magnetic field preservation space may correspond to only one permanent magnet sheet, and the total thickness of all permanent magnet sheets, which is the thickness of one permanent magnet sheet, may also have the same cost trend relationship. On this basis, the magnetic field preservation space may be a storage container, such as a drawer, and the permanent magnet sheet is disposed substantially in conformity with the top side or the bottom side of the drawer. The magnetic field preservation space may also be a space formed by partitions, for example, the space between two longitudinally distributed partitions, or the space between a partition and the bottom wall or the top wall of the storage compartment, or the space above the partition, and a height identifier is provided on the inner wall of the box to identify the height of the magnetic field preservation space.

[0073] Up to this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A magnetic field fresh-keeping refrigerator, characterized in that: include: A box body, wherein the box body is provided with a magnetic field preservation space; and At least one permanent magnetic sheet, the permanent magnetic sheet is disposed close to the magnetic field preservation space and covers at least a portion of the magnetic field preservation space to generate a magnetic field acting on the magnetic field preservation space; The ratio of the sum of the thicknesses of all the permanent magnetic sheets to the size of the magnetic field preservation space along the covering direction of the permanent magnetic sheets is greater than or equal to 0.008 and less than or equal to 0.

1.

2. The magnetic field fresh-keeping refrigerator according to claim 1, characterized in that: The box body forms a refrigerated compartment, the magnetic field preservation space is arranged in the refrigerated compartment, and the ratio of the sum of the thicknesses of all the permanent magnetic sheets to the size of the magnetic field preservation space along the covering direction of the permanent magnetic sheets is greater than or equal to 0.015 and less than or equal to 0.

1.

3. The magnetic field fresh-keeping refrigerator according to claim 2, characterized in that: The ratio of the sum of the thicknesses of all the permanent magnetic sheets to the size of the magnetic field preservation space along the covering direction of the permanent magnetic sheets is greater than or equal to 0.04 and less than or equal to 0.

07.

4. The magnetic field fresh-keeping refrigerator according to claim 2, characterized in that: The ratio of the sum of the thicknesses of all the permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space is greater than or equal to 0.05 mm / Gauss and less than or equal to 0.3 mm / Gauss.

5. The magnetic field fresh-keeping refrigerator according to claim 4, characterized in that: The ratio of the total thickness of all the permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space is greater than or equal to 0.12 mm / Gauss and less than or equal to 0.18 mm / Gauss.

6. The magnetic field fresh-keeping refrigerator according to claim 1, characterized in that: The box body forms a freezing compartment, the magnetic field preservation space is arranged in the freezing compartment, and the ratio of the sum of the thicknesses of all the permanent magnetic sheets to the size of the magnetic field preservation space along the covering direction of the permanent magnetic sheets is greater than or equal to 0.008 and less than or equal to 0.

04.

7. The magnetic field fresh-keeping refrigerator according to claim 6, characterized in that: The ratio of the sum of the thicknesses of all the permanent magnetic sheets to the size of the magnetic field preservation space along the covering direction of the permanent magnetic sheets is greater than or equal to 0.015 and less than or equal to 0.

03.

8. The magnetic field fresh-keeping refrigerator according to claim 6, characterized in that: The ratio of the sum of the thicknesses of all the permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space is greater than or equal to 0.05 mm / Gauss and less than or equal to 0.8 mm / Gauss.

9. The magnetic field fresh-keeping refrigerator according to claim 8, characterized in that: The ratio of the sum of the thicknesses of all the permanent magnet sheets to the magnetic induction intensity at the center point of the magnetic field preservation space is greater than or equal to 0.15 mm / Gauss and less than or equal to 0.4 mm / Gauss.

10. The magnetic field fresh-keeping refrigerator according to claim 1, characterized in that: The magnetic field fresh-keeping refrigerator comprises two permanent magnet sheets, and the two permanent magnet sheets are respectively arranged on opposite sides of the magnetic field fresh-keeping space.

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