Magnetic field fresh-keeping structure and refrigerator applying same

Abstract

The utility model provides a magnetic field fresh-keeping structure and a refrigerator applying the same, and the magnetic field fresh-keeping structure comprises at least one freezing chamber arranged above an evaporator; the heat preservation layer is arranged at the bottom of the freezing chamber; the cold storage device is arranged at the bottom, opposite to the freezing chamber, of the heat preservation layer, the cold storage device and the evaporator are arranged in a spaced mode, a cold storage agent capable of obtaining cold energy from the evaporator is stored in the cold storage device, a magnetic part is arranged on the cold storage device, and the magnetic part obtains the cold energy from the cold storage agent so as to generate a magnetic field for keeping the freezing chamber fresh. According to the magnetic field fresh-keeping structure provided by the utility model, the evaporator is adopted to cool and control the temperature of the cold accumulation device and the magnetic piece when the refrigerator is in refrigeration operation, so that the magnetic moment direction presents ferromagnetism or paramagnetism, and refrigeration of other chambers is not influenced; when the refrigerator does not refrigerate, a cold storage agent in the cold storage device is used for storing cold energy to cool the magnetic part, and the magnetic field fresh-keeping function is kept for a long time after a refrigerating system is shut down; according to different magnetic forces required by food materials, different evaporator contact areas are selected by the cold storage devices in the chambers to adjust the magnetic forces.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic field preservation for refrigerators, and particularly relates to a magnetic field preservation structure and a refrigerator applying the same. Background Art

[0002] Magnetic field preservation is to utilize the magnetization effect of the magnetic field to inhibit the activities of microorganisms and enzymes in food materials, thereby prolonging the preservation period of the food materials. For common meats, applying a 30 mT magnetic field during freezing can inhibit the size of ice crystals and the formation of large-area ice crystals, thereby protecting the quality and taste of the meats; for common cold-resistant vegetables (such as corn kernels, green peas, carrot grains, etc.), applying a 10 mT magnetic field to assist freezing can significantly delay the aging process of vegetable cells.

[0003] In the prior art, there has emerged a refrigerator provided with a device capable of generating an external electric field in the freezing compartment. By applying an external electric field to the freezing compartment, the magnetic moments of the magnetic materials in the freezing compartment are arranged in an orderly manner under the action of the external electric field, and the direction parallelism and consistency are improved, thereby enhancing the magnetism of the magnetic materials and the magnetic field intensity generated by them, and further enhancing the effect of the magnetic field in inhibiting the activities of microorganisms and enzymes in food materials and affecting the ice crystal formation process during freezing.

[0004] However, using an external electric field to control the magnetic moment direction of magnetic materials causes a large amount of power waste, resulting in a reduction in the energy efficiency of the refrigerator and being unfavorable for low-carbon environmental protection. Research has found that temperature affects the magnetic moment arrangement of magnetic materials. The lower the temperature, the more orderly the magnetic moment arrangement, and the higher the direction parallelism and consistency. Therefore, the magnetism of magnetic materials increases with the decrease in temperature, showing ferromagnetism, as Figure 1 shown; the higher the temperature, the more disorderly the magnetic moment arrangement, the higher the degree of direction chaos, and its magnetism decreases accordingly, showing paramagnetism, as Figure 2 shown. For common magnets, when the temperature is -18 to -26 °C, the magnetic force can reach about 30 mT; when the temperature is -5 to 0 °C, the magnetic force can reach about 10 mT. Therefore, the magnetic materials can be cooled to the above temperature range to make the magnetic moment arrangement orderly, the direction parallelism and consistency improved, the magnetism of the magnetic materials and the magnetic field intensity enhanced, and the activities of microorganisms and enzymes in food materials inhibited and the ice crystal formation process during freezing affected.

[0005] However, the freezing compartment (drawer) of a traditional refrigerator cannot reach the above-mentioned lower temperature range. If the evaporator pipeline is directly used to cool the magnetic materials in the freezing compartment (drawer), on the one hand, it will affect the refrigeration effect of other compartments when the refrigeration system of the refrigerator is operating, and on the other hand, when the refrigeration system of the refrigerator stops working, the magnetic materials will cause the magnetic field preservation to fail due to the inability to continue cooling. Therefore, its magnetic field preservation effect is difficult to last and its practicability is low. Summary of the Utility Model

[0006] The present utility model provides a magnetic field fresh-keeping structure and a refrigerator applying the same, aiming to solve the technical problems of existing refrigerators that use an externally applied electric field to control the magnetic moment direction of magnetic materials to achieve magnetic field fresh-keeping, resulting in power waste and low energy efficiency of the refrigerator.

[0007] To solve the above problems, the technical solution adopted by the present utility model is as follows:

[0008] The present utility model provides a magnetic field fresh-keeping structure, including:

[0009] At least one freezing compartment, which is arranged above the evaporator;

[0010] A heat insulation layer, which is arranged at the bottom of the freezing compartment;

[0011] A cold storage device, which is arranged at the bottom of the heat insulation layer facing away from the freezing compartment and is arranged at an interval from the evaporator. The cold storage device stores a cold storage agent that can obtain cold from the evaporator. A magnetic part is arranged on the cold storage device, and the magnetic part obtains cold from the cold storage agent to generate a magnetic field for fresh-keeping the freezing compartment.

[0012] Furthermore, the magnetic field fresh-keeping structure further includes:

[0013] A driving device, which is used to drive at least one shielding structure to reciprocate at the gap between the cold storage device and the evaporator, so as to adjust the area of the shielding structure covering the gap, thereby changing the cold obtained by the cold storage device from the evaporator.

[0014] Preferably, the evaporator is a plate evaporator, and the freezing compartment includes:

[0015] A first compartment, which is arranged above one end of the length direction of the evaporator;

[0016] A second compartment, which is arranged at one end of the first compartment and is located above the other end of the length direction of the evaporator;

[0017] There are a pair of cold storage devices, which are respectively connected to the bottoms of the first compartment and the second compartment through a pair of heat insulation layers;

[0018] The shielding structure includes:

[0019] A first shielding member and a second shielding member;

[0020] The driving device includes:

[0021] A first driving mechanism, which is used to drive the first shielding member to reciprocate at the gap between the cold storage device connected to the bottom of the first compartment and the evaporator;

[0022] A second driving mechanism, which is used to drive the second shielding member to reciprocate at the gap between the cold storage device connected to the bottom of the second compartment and the evaporator.

[0023] Preferably, the first compartment is a rectangular meat freezer compartment, the second compartment is a rectangular fruit and vegetable freezer compartment, and the second compartment is arranged at one end of the first compartment in the length direction at the same height. The length direction of the second compartment is parallel to the length direction of the first compartment;

[0024] The evaporator is in the shape of a rectangular plate, and the length direction of the evaporator is parallel to the length direction of the first compartment. The width of the evaporator is greater than the width of the cold storage device connected to the bottom of the first compartment, and the evaporator completely covers the space below the cold storage device connected to the bottom of the first compartment;

[0025] The width of the first shielding member is greater than the widths of the evaporator and the first compartment.

[0026] Preferably, the width of the evaporator is greater than the width of the cold storage device connected to the bottom of the second compartment, and the evaporator partially covers the space below the cold storage device connected to the bottom of the second compartment.

[0027] Preferably, the lengths of the first compartment and the second compartment are equal. A pair of cold storage devices connected to the corresponding bottoms of the first compartment and the second compartment are both in the shape of a rectangular parallelepiped and are coaxially arranged, and the evaporator covers one-third of the bottom area of the cold storage device connected to the bottom of the second compartment.

[0028] Furthermore, the shielding structure further includes: a third shielding member; the driving device further includes:

[0029] A third driving mechanism, located between the first driving mechanism and the second driving mechanism, is used to drive the third shielding member to reciprocate in the opposite direction to the first shielding member at the gap between the cold storage device connected to the bottom of the first compartment and the evaporator.

[0030] Preferably, the thickness of the gap is less than 0.2 cm.

[0031] Preferably, the cold storage device includes:

[0032] A housing, the cold storage agent is stored in the inner cavity of the housing, and a magnetic member is arranged on the top surface of the housing facing the freezing compartment;

[0033] The heat insulation layer is a heat insulation cover made of heat insulation material. The bottom surface of the heat insulation cover is provided with a groove. The top surface of the heat insulation cover facing away from the groove is connected to the bottom surface of the freezing compartment, and the bottom surface of the heat insulation cover is connected to the top surface of the housing, and the magnetic member is enclosed inside the groove.

[0034] Furthermore, the cold storage device further includes:

[0035] A temperature sensor, arranged inside the groove, is used to detect the real-time temperature of the magnetic member.

[0036] Preferably, a plurality of magnetic members are evenly distributed on the top of the cold storage device.

[0037] The present utility model further provides a refrigerator, which includes a cabinet, an evaporator disposed inside the cabinet, and also includes the above-mentioned magnetic field preservation structure. A driving device is installed inside the cabinet, and a freezing compartment is a movable compartment that is slidably installed inside the cabinet and located above the evaporator.

[0038] Compared with the prior art, the present utility model has the following beneficial effects:

[0039] For the magnetic field preservation structure provided by the present utility model, when the refrigerator is operating normally for refrigeration, the surface temperature of the evaporator is used to cool the cold storage device and the magnetic part, so as to realize the temperature control of the magnetic part, so that the direction of its magnetic moment presents ferromagnetic or paramagnetic, avoiding the problems of power waste and reduced energy efficiency of the refrigerator caused by the traditional method of using an external electric field to control the magnetic moment direction of the magnetic material, and not affecting the refrigeration effect of other compartments; when the refrigerator is not refrigerating, the coolant in the cold storage device releases the cold stored by itself to cool the magnetic part, and the magnetic field preservation function is maintained for a long time after the refrigeration system stops; according to the different magnetic forces required by different food materials (meat, fruits and vegetables), the corresponding cold storage devices in the first compartment and the second compartment select different contact areas with the evaporator to realize temperature control, so as to adjust the magnitude of the magnetic force. Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions proposed by the present utility model, the following will be described in detail in combination with embodiments and drawings. It should be understood that the drawings in the following description are only some embodiments of the present utility model, and those skilled in the art can make changes to these drawings under the concept of the present utility model.

[0041] Figure 1 It is a schematic diagram of the ferromagnetic field generated by the magnetic material at low temperature;

[0042] Figure 2 It is a schematic diagram of the paramagnetic field generated by the magnetic material at high temperature;

[0043] Figure 3 It is a schematic assembly three-dimensional structure diagram of an embodiment of the magnetic field preservation structure provided by the present utility model;

[0044] Figure 4 It is a schematic exploded three-dimensional structure diagram of an embodiment of the magnetic field preservation structure provided by the present utility model;

[0045] Figure 5 It is a schematic exploded three-dimensional structure diagram of another embodiment of the magnetic field preservation structure provided by the present utility model;

[0046] Figure 6 It is a control flow logic block diagram of the magnetic field preservation method provided by the present utility model.

[0047] Among them, the main reference signs of each drawing in the figure are as follows:

[0048] 1. Freezing compartment; 11. First compartment; 12. Second compartment; 2. Evaporator; 3. Thermal insulation layer; 31. Groove; 4. Cold storage device; 41. Housing; 42. Temperature sensor; 5. Magnetic part; 6. Driving device; 61. First driving mechanism; 62. Second driving mechanism; 63. Third driving mechanism; 64. Fourth driving mechanism; 7. Shielding structure; 71. First shielding part; 72. Second shielding part; 73. Third shielding part; 74. Fourth shielding part; 8. Gap; 9. Cold quantity transmission channel. Detailed implementation mode

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the following is a further detailed description of the present utility model in combination with the attached Figures 3 - 6 drawings and embodiments.

[0050] Please refer to Figures 3 - 5 together. The magnetic field preservation structure provided by the present utility model includes:

[0051] At least one freezing compartment 1, arranged above the evaporator 2 that provides cold quantity; a thermal insulation layer 3, arranged at the bottom of the freezing compartment 1; a cold storage device 4, arranged at the bottom of the thermal insulation layer 3 facing away from the freezing compartment 1 and spaced from the evaporator 2; a cold storage agent that can obtain cold quantity from the evaporator 2 is stored inside the cold storage device 4, and a magnetic part 5 is arranged on the cold storage device 4. The magnetic part 5 obtains cold quantity from the cold storage agent of the cold storage device 4 to generate a ferromagnetic or paramagnetic magnetic field with strong magnetism for preserving freshness in the freezing compartment 1. At the same time, since the thermal insulation layer 3 is arranged at the bottom of the compartment, it plays a role in blocking the cold quantity transmitted from the cold storage device 4 to the magnetic material from entering the compartment, avoiding affecting the temperature of the compartment.

[0052] Please refer to Figures 3 - 5 together. In this embodiment, the magnetic field preservation structure further includes:

[0053] A driving device 6, used to drive at least one shielding structure 7 to reciprocate at the gap 8 between the cold storage device 4 and the evaporator 2 (that is, reciprocate along the relative surfaces of the cold storage device 4 and the evaporator 2), so as to adjust the area of the shielding structure 7 covering the gap 8, so that the shielding structure 7 is opened, partially opened or completely closed to connect the cold quantity transmission space on the surfaces of the evaporator 2 and the cold storage device 4, so as to control the temperature transmission at the gap 8 and change the cold quantity obtained by the cold storage device 4 from the evaporator 2 (including adjusting the size of the cold quantity transmission space to increase, decrease or close the cold quantity transmission space to completely stop obtaining cold quantity from the evaporator 2 at the rate of cold quantity obtained by the cold storage device 4 from the evaporator 2).

[0054] Please refer to Figures 3 - 5 together. In this embodiment, the magnetic part 5 is arranged at the top of the cold storage device 4 facing the freezing compartment 1.

[0055] Please refer to Figures 3 - 5 as well. In this embodiment, the cold storage device 4 is connected to the bottom of the freezing compartment 1 through the heat insulation layer 3.

[0056] In other embodiments, the cold storage device 4 can also be installed on other fixtures (such as inside the refrigerator casing), so that the cold storage device 4 is spaced apart from the heat insulation layer 3 provided at the bottom of the freezing compartment 1.

[0057] Please refer to Figures 3 - 5 as well. In this embodiment, the evaporator 2 is a plate evaporator 2.

[0058] The freezing compartment 1 includes: a first compartment 11, disposed above one end of the length direction of the evaporator 2; a second compartment 12, disposed at one end of the first compartment 11 and located above the other end of the length direction of the evaporator 2; there are a pair of cold storage devices 4, which are respectively connected to the corresponding bottoms of the first compartment 11 and the second compartment 12 through a pair of heat insulation layers 3. The shielding structure 7 includes: a first shielding member 71 and a second shielding member 72.

[0059] The driving device 6 includes: a first driving mechanism 61, configured to drive the first shielding member 71 to reciprocate at the gap 8 between the cold storage device 4 connected to the bottom of the first compartment 11 and the evaporator 2; a second driving mechanism 62, configured to drive the second shielding member 72 to reciprocate at the gap 8 between the cold storage device 4 connected to the bottom of the second compartment 12 and the evaporator 2. By the movements of the first shielding member 71 and the second shielding member 72 respectively, the area covered by them at the corresponding gap 8 is adjusted, so that the first shielding member 71 and the second shielding member 72 respectively open, partially open or completely close the cold quantity transmission space connecting the surface of the evaporator 2 and the surfaces of the corresponding cold storage devices 4 at the bottoms of the first compartment 11 and the second compartment 12, realizing respectively changing the cold quantity obtained by the pair of cold storage devices 4 from the evaporator 2 (including respectively increasing, decreasing the cold quantity acquisition rate of the pair of cold storage devices 4 or making them completely stop obtaining cold quantity).

[0060] Please refer to Figures 3 - 5In this embodiment, the first chamber 11 is a rectangular parallelepiped meat freezing chamber, and the second chamber 12 is a rectangular parallelepiped fruit and vegetable freezing chamber. The second chamber 12 is arranged at the same height as one end of the length direction of the first chamber 11, and the length direction of the second chamber 12 is parallel to the length direction of the first chamber 11. The evaporator 2 is in the shape of a rectangular plate, and the length direction of the evaporator 2 is parallel to the length direction of the first chamber 11. The evaporator 2 is parallel to the horizontal bottom surfaces of the first chamber 11 and the second chamber 12. The width of the evaporator 2 is greater than the width of the cold storage device 4 connected to the bottom of the first chamber 11. The end of the evaporator 2 located below the first chamber 11 is completely extended from the end of the first chamber 11 away from the second chamber 12. That is, the evaporator 2 completely covers the space below the cold storage device 4 connected to the bottom of the first chamber 11. When the first shielding member 71 is fully opened, the cold storage device 4 connected to the bottom of the first chamber 11 can obtain the maximum amount of cold from the evaporator 2 below, thereby fully cooling the first chamber 11 (meat freezing chamber).

[0061] At the same time, the width of the first shielding member 71 is greater than the width of the evaporator 2 and the first chamber 11, so that when the first shielding member 71 passes through the gap 8 between the evaporator 2 and the cold storage device 4 connected to the bottom of the first chamber 11, it can completely block and cover the above-mentioned cold transfer space formed therein, thereby preventing the evaporator 2 from continuing to contact the cold storage device 4 through the cold transfer space when the temperature of the magnetic member 5 has dropped to the preset temperature T0 and it is necessary to stop obtaining cold energy from the cold storage device 4, causing the magnetic member 5 to continue to cool down to below the preset temperature T0, resulting in the magnetic field generated by it not meeting the expectations of the required fresh-keeping food.

[0062] Please also refer to Figures 3 - 5 In this embodiment, the width of the evaporator 2 is greater than the width of the cold storage device 4 connected to the bottom of the second compartment 12. Furthermore, the other end of the evaporator 2 located below the second compartment 12 only extends partially into the space below the second compartment 12 (i.e., only extends below the end of the second compartment 12 adjacent to the first compartment 11). This allows the evaporator 2 to partially cover the space below the cold storage device 4 connected to the bottom of the second compartment 12. When the second shielding member 72 is fully open, the cold storage device 4 connected to the bottom of the second compartment 12 receives limited cooling from the evaporator 2 below, appropriately cooling the second compartment 12 (the fruit and vegetable freezing compartment). This prevents the corresponding cold storage device 4 in the second compartment 12 (which serves as the fruit and vegetable freezing compartment) from receiving the same amount of cooling from the evaporator 2 as the corresponding cold storage device 4 in the first compartment 11 (which serves as the meat freezing compartment). This prevents the corresponding magnetic member 5 in the second compartment 12 from being excessively cooled, which could cause damage to the fruit and vegetables due to an excessively high magnetic field strength within the second compartment 12.

[0063] Please also refer to Figures 3 - 5, in this embodiment, the lengths of the first chamber 11 and the second chamber 12 are equal. A pair of cold storage devices 4 connected to the corresponding bottoms of the first chamber 11 and the second chamber 12 are both cuboid-shaped and coaxially arranged. The evaporator 2 covers one-third of the area of the bottom surface of the cold storage device 4 connected to the bottom of the second chamber 12. When the second shielding member 72 is completely open, the cold storage device 4 at the bottom of the second chamber 12 obtains cold from the evaporator 2 below and maintains a relatively small value compared to the cold storage device 4 at the bottom of the first chamber 11.

[0064] Please refer to Figures 3 - 5 , as a more preferred implementation manner of this embodiment, the longer central axes of the first chamber 11 and the second chamber 12 coincide with each other, that is, the first chamber 11 and the second chamber 12 are coaxially arranged.

[0065] Please refer to Figures 3 - 5 , in this embodiment, the first chamber 11 and the second chamber 12 are integrated.

[0066] In other embodiments, the first chamber 11 and the second chamber 12 may also be arranged at intervals.

[0067] Please refer to Figures 3 - 5 , in this embodiment, the shielding structure 7 further includes: a third shielding member 73; the driving device 6 further includes: a third driving mechanism 63, located between the first driving mechanism 61 and the second driving mechanism 62, for driving the third shielding member 73 to reciprocate in the opposite direction to the first shielding member 71 at the gap 8 between the cold storage device 4 connected to the bottom of the first chamber 11 and the evaporator 2, so that the first shielding member 71 and the third shielding member 73 open and close by moving away from or approaching each other at the gap 8 to open and close the corresponding cold quantity delivery channels 9.

[0068] In this embodiment, the freezing compartment 1 may further include a third chamber or more chambers.

[0069] Please refer to Figure 5 , as a preferred implementation manner of this embodiment, the driving device 6 further includes:

[0070] A fourth driving mechanism 64, located between the third driving mechanism 63 and the second driving mechanism 62, for driving the fourth shielding member 74 to reciprocate in the opposite direction to the second shielding member 72 at the gap 8 between the cold storage device 4 connected to the bottom of the second chamber 12 and the evaporator 2, so that the first shielding member 71 and the third shielding member 73 open and close by moving away from or approaching each other at the gap 8, realizing the opening and closing of the corresponding cold quantity delivery channels 9.

[0071] Please refer to Figures 3 - 5, in this embodiment, the thickness of the above-mentioned gap 8 is less than 0.2 cm, and the first shielding member 71, the second shielding member 72, the third shielding member 73, and the fourth shielding member 74 are all thin-walled shielding plates that match the thickness of the corresponding gap 8.

[0072] Please refer to Figures 3 - 5 , as a preferred implementation manner of this embodiment, the first driving mechanism 61, the second driving mechanism 62, the third driving mechanism 63, and the fourth driving mechanism 64 all include mounting frames that are slightly thicker than the first shielding member 71, the second shielding member 72, the third shielding member 73, and the fourth shielding member 74 and are parallel to the evaporator 2 and the first compartment 11 and the second compartment 12. The mounting frames are fixedly installed on a fixed object (such as the inside of the refrigerator casing) for stably supporting the entire driving mechanism; the first driving mechanism 61, the second driving mechanism 62, the third driving mechanism 63, and the fourth driving mechanism 64 also include linear driving modules installed on the mounting frames, which are respectively used to drive the first shielding member 71, the second shielding member 72, the third shielding member 73, and the fourth shielding member 74 to reciprocally expand and contract and translate relative to the corresponding mounting frames.

[0073] As a more optimal implementation manner of this embodiment, the above-mentioned linear driving module can adopt modules such as telescopic cylinders, slide cylinders, lead screw nuts, gear racks, synchronous belt pulleys, etc.

[0074] In other embodiments, the above-mentioned mounting frame can also be replaced by a support rail or a mounting grid, and the first shielding member 71, the second shielding member 72, the third shielding member 73, and the fourth shielding member 74 can also be arc-shaped or U-shaped plates bent upward.

[0075] In this embodiment, the first shielding member 71, the second shielding member 72, the third shielding member 73, and the fourth shielding member 74 can be made of materials such as plastics and steels.

[0076] Please refer to Figures 3 - 5 , in this embodiment, the cold storage device 4 includes:

[0077] A housing 41, the above-mentioned cold storage agent is stored in the inner cavity of the housing 41, and a magnetic member 5 is arranged on the top surface of the housing 41 facing the freezing compartment 1; the thermal insulation layer 3 is a thermal insulation cover made of thermal insulation material, and a groove 31 is provided on the bottom surface of the thermal insulation cover. The top surface of the thermal insulation cover facing away from the groove 31 is connected to the bottom surface of the freezing compartment 1, and the bottom surface of the thermal insulation cover is connected to the top surface of the housing 41, and the magnetic member 5 is enclosed inside the groove 31.

[0078] In this embodiment, the cold storage agent is a semi-transparent or opaque viscous colloidal mixture composed of organic or inorganic compounds. It can absorb cold to cool the magnetic member in a low-temperature environment near the surface of the evaporator 2, and can release a large amount of cold to cool the magnetic member at a higher temperature. Therefore, it can maintain a low-temperature environment for itself and the surrounding area for a long time.

[0079] As a preferred embodiment of this embodiment, the cold storage agent can adopt a composite salt solution (such as calcium chloride, sodium chloride, amine salt solution, etc.).

[0080] In this embodiment, the heat insulation layer 3 can be made of heat insulation materials such as sponge and foam.

[0081] Please refer to together Figures 3 - 5 , in this embodiment, the cold storage device 4 further includes:

[0082] A temperature sensor 42, which is arranged inside the groove 31 and is used to detect the real-time temperature of the magnetic part 5.

[0083] Please refer to together Figures 3 - 5 , in this embodiment, a plurality of magnetic parts 5 are evenly distributed on the top of the cold storage device 4.

[0084] In other embodiments, a single magnetic part 5 that integrally covers the top surface of the cold storage device 4 can also be provided on the top of the cold storage device 4.

[0085] In this embodiment, the housing 41 of the cold storage device 4 can be made of materials such as plastic, iron, and aluminum.

[0086] The present utility model also provides a refrigerator (not shown in the figure), which includes a housing (not shown in the figure), an evaporator 2 arranged inside the housing, and further includes the above-mentioned magnetic field fresh-keeping structure. The driving device 6 is installed inside the housing. The freezing compartment 1 is a movable compartment that is slidably installed inside the housing and is located above the evaporator 2, so as to be used as a freezing drawer that is movably installed inside the housing. And the freezing drawer (freezing compartment 1) can be assisted by the above-mentioned magnetic field fresh-keeping structure to communicate the air duct between the evaporator 2 and the freezing drawer (freezing compartment 1), and perform magnetic field freezing fresh-keeping on the food stored therein.

[0087] Please refer to Figure 6 , the present utility model also provides a magnetic field fresh-keeping control method, which is applied to the above-mentioned refrigerator. The magnetic field fresh-keeping control method includes the following steps:

[0088] S1: Put the food into the freezing compartment 1;

[0089] S2: Judge whether the refrigeration system of the refrigerator is turned on. If so, enter S3; if not, the cold storage device 4 uses the stored cold energy to cool the magnetic part 5;

[0090] S3: Drive the shielding structure 7 to move at the gap 8 between the cold storage device 4 and the evaporator 2 to open the cold energy transmission space connecting the evaporator 2 and the cold storage device 4, so that the cold storage device 4 obtains cold energy from the evaporator 2 and cools the magnetic part 5.

[0091] In this embodiment, after S3, it further includes:

[0092] S4: Detect the real-time temperature T of the magnetic member 5, and determine whether the real-time temperature T is greater than or equal to the preset temperature T0. If so, drive the shielding structure 7 to close the cold quantity transmission space connecting the evaporator 2 and the cold storage device 4; if not, keep the shielding structure 7 open to connect the cold quantity transmission space between the evaporator 2 and the cold storage device 4, and return to detect the real-time temperature T of the magnetic member 5 until the real-time temperature T is greater than or equal to the preset temperature T.

[0093] As a preferred implementation manner of this embodiment, S3 includes:

[0094] Drive the first shielding member 71 to move at the gap 8 between the cold storage device 4 connected to the bottom of the first chamber 11 and the evaporator 2, so as to open the connection between the evaporator 2 and the cold storage device 4, completely cover the cold quantity transmission space below the cold storage device 4, and enable the cold storage device 4 to obtain cold quantity from the evaporator 2 (at a high rate) and rapidly cool its magnetic member 5;

[0095] Meanwhile, drive the second shielding member 72 to move at the gap 8 between the other cold storage device 4 connected to the bottom of the second chamber 12 and the evaporator 2, so as to open the connection between the evaporator 2 and the other cold storage device 4, partially cover (preferably cover one-third of the surface area) the other cold quantity transmission space below the other cold storage device 4, and enable the other cold storage device 4 to obtain cold quantity from the evaporator 2 (at a high rate) and rapidly cool its magnetic member 5.

[0096] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A magnetic field fresh-keeping structure, characterized in that, Comprising: At least one freezing compartment (1), arranged above the evaporator (2); A heat insulation layer (3), arranged at the bottom of the freezing compartment (1); A cold storage device (4), arranged at the bottom of the heat insulation layer (3) facing away from the freezing compartment (1) and spaced from the evaporator (2), and a cold storage agent capable of obtaining cold from the evaporator (2) is stored inside the cold storage device (4); A magnetic member (5), arranged on the cold storage device (4), and the magnetic member (5) obtains cold from the cold storage agent to generate a magnetic field for fresh-keeping of the freezing compartment (1).

2. The magnetic field freshness preservation structure according to claim 1, characterized in that, Further comprising: A driving device (6), used to drive at least one shielding structure (7) to reciprocate at the gap (8) between the cold storage device (4) and the evaporator (2), so as to adjust the area of the shielding structure (7) covering the gap (8), thereby changing the cold obtained by the cold storage device (4) from the evaporator (2).

3. The magnetic field preservation structure according to claim 2, wherein The evaporator (2) is a plate evaporator (2), and the freezing compartment (1) comprises: A first compartment (11), arranged above one end in the length direction of the evaporator (2); A second compartment (12), arranged at one end of the first compartment (11) and located above the other end in the length direction of the evaporator (2); There are a pair of the cold storage devices (4), which are respectively connected to the corresponding bottoms of the first compartment (11) and the second compartment (12) through a pair of the heat insulation layers (3); The shielding structure (7) comprises: A first shielding member (71) and a second shielding member (72); The driving device (6) comprises: A first driving mechanism (61), used to drive the first shielding member (71) to reciprocate at the gap (8) between the cold storage device (4) connected to the bottom of the first compartment (11) and the evaporator (2); A second driving mechanism (62), used to drive the second shielding member (72) to reciprocate at the gap (8) between the cold storage device (4) connected to the bottom of the second compartment (12) and the evaporator (2).

4. The magnetic field preservation structure according to claim 3, characterized in that The first compartment (11) is a rectangular meat freezing chamber, the second compartment (12) is a rectangular fruit and vegetable freezing chamber, and the second compartment (12) is arranged at the same height at one end in the length direction of the first compartment (11), and the length direction of the second compartment (12) is parallel to the length direction of the first compartment (11); The evaporator (2) is in a rectangular plate shape, and the length direction of the evaporator (2) is parallel to the length direction of the first compartment (11), the width of the evaporator (2) is greater than the width of the cold storage device (4) connected to the bottom of the first compartment (11), and the evaporator (2) completely covers the space below the cold storage device (4) connected to the bottom of the first compartment (11); The width of the first shielding member (71) is greater than the widths of the evaporator (2) and the first compartment (11).

5. The magnetic field freshness preservation structure according to claim 4, wherein The width of the evaporator (2) is greater than the width of the cold storage device (4) connected to the bottom of the second compartment (12), and the evaporator (2) partially covers the space below the cold storage device (4) connected to the bottom of the second compartment (12).

6. The magnetic field freshness preservation structure according to claim 5, wherein The lengths of the first chamber (11) and the second chamber (12) are equal. A pair of cold storage devices (4) connected to the corresponding bottoms of the first chamber (11) and the second chamber (12) are both cuboid-shaped and coaxially arranged. The evaporator (2) covers an area equal to one-third of the bottom area of the cold storage device (4) connected to the bottom of the second chamber (12).

7. The magnetic field freshness preservation structure according to claim 3, wherein The shielding structure (7) further includes: A third shielding member (73); The driving device (6) further includes: A third driving mechanism (63), located between the first driving mechanism (61) and the second driving mechanism (62), for driving the third shielding member (73) to reciprocate in the gap (8) between the cold storage device (4) connected to the bottom of the first chamber (11) and the evaporator (2) in a direction opposite to that of the first shielding member (71).

8. The magnetic field preservation structure according to any one of claims 2-7, characterized in that, The thickness of the gap (8) is less than 0.2 cm.

9. The magnetic field freshness preservation structure according to any one of claims 1-7, characterized in that, The cold storage device (4) includes: A housing (41), the cold storage agent is stored in the inner cavity of the housing (41), and the magnetic member (5) is provided on the top surface of the housing (41) facing the freezing compartment (1); The heat insulation layer (3) is a heat insulation cover made of heat insulation material. The bottom surface of the heat insulation cover is provided with a groove (31). The top surface of the heat insulation cover facing away from the groove (31) is connected to the bottom surface of the freezing compartment (1). The bottom surface of the heat insulation cover is connected to the top surface of the housing (41), and the magnetic member (5) is enclosed inside the groove (31).

10. The magnetic field preservation structure according to claim 9, wherein The cold storage device (4) further includes: A temperature sensor (42), provided inside the groove (31), for detecting the real-time temperature of the magnetic member (5).

11. The magnetic field freshness preservation structure according to any one of claims 1-7, wherein A plurality of the magnetic members (5) are evenly distributed on the top of the cold storage device (4).

12. A refrigerator, comprising a housing and an evaporator (2) disposed within the housing, characterized in that, It further includes the magnetic field freshness preservation structure according to any one of claims 1-11. The driving device (6) is installed inside the casing. The freezing compartment (1) is slidably installed inside the casing and is an active compartment located above the evaporator (2).

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