Refrigerator suitable for ultra-cold temperature preservation

Abstract

The application relates to the field of food preservation technology, and provides a refrigerator suitable for super-ice temperature preservation, which comprises a refrigerator body; the refrigerator body comprises a refrigeration chamber; first, second, third and fourth coils are arranged in the refrigeration chamber and are spaced apart along a first direction; the magnetic field strength of the magnetic field generated by the coils ranges from 0 to 10 mT; the frequency of the first, second and third magnetic fields ranges from 0 to 100 Hz; the distance between the first coil and the second coil is L1, the distance between the second coil and the third coil is L2, and the distance between the third coil and the fourth coil is L3; wherein L1:L2:L3=(2-4):(0.5-1.5):(2-4). The refrigerator suitable for super-ice temperature preservation can enable food such as vegetables and fruits to be stored at low temperature under zero without freezing, and the preservation effect is improved.

Description

Technical Field

[0001] This invention relates to the field of food preservation technology, and in particular to a refrigerator suitable for ultra-ice temperature preservation. Background Technology

[0002] In recent years, the global food industry has seen a surge in demand for high-quality, fresh, and perishable products such as fruits and vegetables. How to preserve and prevent spoilage of goods during storage and transportation for extended periods has become a significant challenge for the industry.

[0003] In existing technologies, refrigerators are commonly used to refrigerate or freeze food. To prevent freezing, perishable foods such as fruits and vegetables usually need to be refrigerated at temperatures above freezing. However, when perishable foods such as fruits and vegetables are refrigerated at temperatures above freezing, they are prone to spoilage due to biological and enzymatic reactions. In other words, traditional preservation methods (such as refrigeration) can only preserve fruits and vegetables for a short period of time and cannot maintain the freshness, taste, and nutritional value required for these products for a long time.

[0004] Therefore, there is an urgent need for a refrigerator suitable for ultra-low temperature storage to solve the above problems. Summary of the Invention

[0005] This invention provides a refrigerator suitable for ultra-low temperature storage, which solves the problem that vegetables, fruits and other foods are prone to spoilage during storage in the prior art. It enables vegetables, fruits and other foods to be stored at sub-zero temperatures without freezing, thus improving the preservation effect.

[0006] The present invention provides a refrigerator suitable for ultra-low temperature preservation, comprising a refrigerator body, the refrigerator body including a refrigerator compartment, wherein a first coil, a second coil, a third coil and a fourth coil are spaced apart along a first direction in the refrigerator compartment, the first coil and the second coil are adapted to generate a first magnetic field, the second coil and the third coil are adapted to generate a second magnetic field, and the third coil and the fourth coil are adapted to generate a third magnetic field;

[0007] The magnetic field strength of the first magnetic field, the second magnetic field, and the third magnetic field ranges from 0 to 10 mT, and the frequency of the first magnetic field, the second magnetic field, and the third magnetic field ranges from 0 to 100 Hz.

[0008] The distance between the first coil and the second coil is L1, the distance between the second coil and the third coil is L2, and the distance between the third coil and the fourth coil is L3;

[0009] Where L1:L2:L3 = (2~4):(0.5~1.5):(2~4).

[0010] According to the refrigerator for ultra-low temperature preservation provided by the present invention, the magnetic field strengths of the first magnetic field, the second magnetic field, and the third magnetic field are 6 mT.

[0011] According to the refrigerator for ultra-low temperature preservation provided by the present invention, the frequencies of the first magnetic field, the second magnetic field, and the third magnetic field are 50 Hz.

[0012] According to the present invention, the refrigerator suitable for ultra-ice temperature preservation has L1:L2:L3 = 3:1:3.

[0013] According to the refrigerator for ultra-low temperature preservation provided by the present invention, the number of turns of the first coil and the second coil is greater than the number of turns of the third coil and the fourth coil.

[0014] According to the refrigerator for ultra-ice temperature preservation provided by the present invention, the first coil is disposed at the top of the refrigerator compartment, and the fourth coil is disposed at the bottom of the refrigerator compartment;

[0015] The refrigerator compartment is provided with a first partition and a second partition at intervals along a first direction, the second coil is disposed on the first partition, and the third coil is disposed on the second partition.

[0016] According to the refrigerator for ultra-ice temperature preservation provided by the present invention, a plurality of slots are provided at intervals along a first direction in the refrigerator compartment.

[0017] According to the refrigerator for ultra-ice temperature preservation provided by the present invention, the first partition and / or the second partition are provided with receiving grooves suitable for winding coils;

[0018] Alternatively, the second coil may be embedded in the first partition, and the third coil may be embedded in the second partition.

[0019] According to the refrigerator for ultra-low temperature preservation provided by the present invention, the top of the refrigerator compartment is provided with a first accommodating space, a first cover plate is provided on one side of the first accommodating space, and the first coil is disposed in the first accommodating space.

[0020] According to the refrigerator for ultra-cold temperature preservation provided by the present invention, the bottom of the refrigerator compartment is provided with a second receiving space, a second cover plate is provided on one side of the second receiving space, and the fourth coil is disposed in the second receiving space.

[0021] The refrigerator provided by this invention, suitable for ultra-low temperature storage, generates a wide-ranging, uniform alternating magnetic field between the first and second coils, the second and third coils, and the third and fourth coils by controlling parameters such as the spacing between the coils, the magnitude of the magnetic field, and the frequency. When vegetables, fruits, and other foods are placed in this alternating magnetic field during storage, their supercooling is increased, preventing freezing at sub-zero temperatures. This achieves ultra-low temperature storage, improves food preservation, and extends storage time.

[0022] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a refrigerator suitable for ultra-ice temperature preservation provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the coil arrangement in a refrigerator suitable for ultra-ice temperature preservation provided in an embodiment of the present invention;

[0026] Figure 3 This is one of the schematic diagrams of a refrigerator partition suitable for ultra-ice temperature storage provided in an embodiment of the present invention;

[0027] Figure 4 This is a second schematic diagram of a refrigerator partition suitable for ultra-low temperature storage provided in an embodiment of the present invention;

[0028] Figure 5 This is one of the schematic diagrams of the cooling curves of the experimental group and the control group in a refrigerator suitable for ultra-ice temperature preservation provided in the embodiments of the present invention;

[0029] Figure 6 This is the second schematic diagram of the cooling curves of the experimental group and the control group in a refrigerator suitable for ultra-ice temperature preservation provided in this embodiment of the invention;

[0030] Figure 7This is a schematic diagram of the refrigeration effect of the experimental group and the control group in a refrigerator suitable for ultra-ice temperature preservation provided in an embodiment of the present invention.

[0031] Figure label:

[0032] 1. Refrigerator body; 2. Refrigerator compartment; 3. First coil; 4. Second coil; 5. Third coil; 6. Fourth coil; 7. First partition; 8. Second partition. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Overview of Existing Technologies: Supercooling technology is a novel storage technology that surpasses freezing temperatures. It maintains food temperatures below the freezing point without freezing, extending shelf life through lower storage temperatures. Perishable foods such as fruits and vegetables are prone to spoilage due to biological and enzymatic reactions. Supercooling can significantly slow down these reactions, thereby greatly extending the shelf life of these products. Furthermore, supercooling technology can reduce moisture loss in food, preserving its original flavor and texture, and improving consumer satisfaction. Magnetic fields can lower the nucleation temperature of water and increase supercooling, providing a possibility for the realization of supercooling storage technology.

[0037] Therefore, further research is needed on how to combine magnetic fields with existing freezing and refrigeration methods to improve food preservation.

[0038] The following is combined Figures 1 to 7 This invention describes a refrigerator suitable for ultra-low temperature storage.

[0039] like Figure 1 As shown, the present invention provides a refrigerator suitable for ultra-ice temperature preservation, including a refrigerator body 1, the refrigerator body 1 including a refrigerator compartment 2, and a first coil 3, a second coil 4, a third coil 5 and a fourth coil 6 are arranged at intervals along a first direction in the refrigerator compartment 2. The first coil 3 and the second coil 4 are suitable for generating a first magnetic field, the second coil 4 and the third coil 5 are suitable for generating a second magnetic field, and the third coil 5 and the fourth coil 6 are suitable for generating a third magnetic field.

[0040] The magnetic field strength of the first magnetic field, the second magnetic field, and the third magnetic field ranges from 0 to 10 mT, and the frequency of the first magnetic field, the second magnetic field, and the third magnetic field ranges from 0 to 100 Hz.

[0041] The distance between the first coil 3 and the second coil 4 is L1, the distance between the second coil 4 and the third coil 5 is L2, and the distance between the third coil 5 and the fourth coil 6 is L3;

[0042] Where L1:L2:L3 = (2~4):(0.5~1.5):(2~4).

[0043] Specifically, the refrigerator for ultra-low temperature preservation provided by the present invention takes a double-door refrigerator as an example. The refrigerator compartment 2 is located at the top of the refrigerator. The first coil 3, the second coil 4, the third coil 5 and the fourth coil 6 are arranged vertically at intervals in the refrigerator compartment 2. The first coil 3, the second coil 4, the third coil 5 and the fourth coil 6 are arranged coaxially and the planes in which each coil is located are parallel to each other.

[0044] In this embodiment of the invention, the magnetic field strengths of the first, second, and third magnetic fields are preferably 6 mT, and the frequencies of the first, second, and third magnetic fields are preferably 50 Hz. Figure 2 As shown, the spacing between the first coil 3 and the second coil 4, the spacing between the second coil 4 and the third coil 5, and the spacing between the third coil 5 and the fourth coil 6 are preferably L1:L2:L3 = 3:1:3, for example, L1 is 30 cm, L2 is 10 cm, and L3 is 30 cm.

[0045] In this embodiment, the first coil 3, the second coil 4, the third coil 5, and the fourth coil 6 are connected in parallel. When in use, it is only necessary to pass an alternating current through the coils and make the current directions in adjacent coils consistent, so that a wide uniform alternating magnetic field can be generated near the midpoint of the common axis of all coils.

[0046] like Figure 3 As shown, in this embodiment, the coil is configured as a circular coil. Figure 4 As shown, in some embodiments, the coil may also be a square coil or a coil of other predetermined shapes, and the present invention does not specifically limit this.

[0047] The refrigerator provided by this invention, suitable for ultra-low temperature storage, generates a wide-ranging, uniform alternating magnetic field between the first coil 3 and the second coil 4, between the second coil 4 and the third coil 5, and between the third coil 5 and the fourth coil 6 by spaced-apart coils 3, 4, 5, and 6 within the refrigerator compartment 2 and by controlling parameters such as the spacing between the coils, the magnitude of the magnetic field, and the frequency. When vegetables, fruits, and other foods are placed in this alternating magnetic field during storage, their supercooling is increased, preventing freezing at sub-zero temperatures. This achieves ultra-low temperature storage, improves food preservation, and extends storage time.

[0048] In this embodiment of the invention, the number of turns of the first coil 3 and the second coil 4 is greater than the number of turns of the third coil 5 and the fourth coil 6, in order to reduce the heat generated by the coils.

[0049] As an example, in the refrigerator for ultra-low temperature preservation provided by this invention, the turns ratio of the first coil 3, the second coil 4, the third coil 5, and the fourth coil 6 can be set to 7:3:3:7. Compared with a coil group consisting of two coils with a turns ratio of 1:1, experimental results show that the coil group of this invention, by setting four coils and optimizing the coil turns ratio, can reduce power by 1 / 2, reduce local heating, and increase the controllable magnetic field space by 4 times.

[0050] In this embodiment of the invention, the first coil 3 is disposed at the top of the refrigerator compartment 2, and the fourth coil 6 is disposed at the bottom of the refrigerator compartment 2; the refrigerator compartment 2 is provided with a first partition 7 and a second partition 8 spaced apart along a first direction, the second coil 4 is disposed on the first partition 7, and the third coil 5 is disposed on the second partition 8.

[0051] Specifically, the top of the refrigerator compartment 2 has a first receiving space, and one side of the first receiving space has a first cover plate. The first coil 3 is disposed within the first receiving space. The bottom of the refrigerator compartment 2 has a second receiving space, and one side of the second receiving space has a second cover plate. The fourth coil 6 is disposed within the second receiving space. By providing the first cover plate and the second cover plate, the first coil 3 and the fourth coil 6 can be hidden within the first receiving space and the second receiving space, respectively, improving the aesthetics of the interior of the refrigerator compartment 2.

[0052] In practice, the first and second cover plates can be made of non-metallic materials (such as food-grade composite materials) that do not affect the magnetic field.

[0053] In this embodiment, the first partition 7 and the second partition 8 are provided with receiving grooves suitable for winding the coil. In a specific implementation, a winding part for winding the coil can be provided between the two parallel plates. After the coil is wound, the gap between the edges of the two parallel plates is sealed to form a whole partition.

[0054] In some embodiments, a receiving space may be provided inside the partition, and the coil may be embedded inside the partition to avoid the wires in the coil being exposed.

[0055] In this embodiment of the invention, the refrigerator compartment 2 is provided with multiple slots spaced apart along a first direction (vertical). By providing multiple slots vertically, the first partition 7 and the second partition 8 can be inserted into different slots, thereby forming storage spaces of different sizes and changing the magnetic field parameters of adjacent coils, thus adjusting the storage conditions.

[0056] A simulation experiment was conducted with the magnetic field strengths of the first, second, and third magnetic fields all being 6 mT, their frequencies being 50 Hz, and the spacing between the first coil 3 and the second coil 4, the second coil 4 and the third coil 5, and the third coil 5 and the fourth coil 6 being L1:L2:L3 = 3:1:3. Using crown pears as the experimental sample, the experimental group was placed in the magnetic field environment of the ultra-low temperature preservation refrigerator provided by this invention, while the control group was placed in a regular refrigerator without added magnetic field. Both were refrigerated for twelve hours.

[0057] like Figure 5 As shown, the experimental results indicate that after the magnetic field was added, the temperature of the experimental group remained at approximately -5±0.2℃ without freezing (no phase transition occurred in the experimental group shown in the figure). In contrast, the control group experienced freezing during the cooling process (a phase transition occurred in the control group shown in the figure). During the cooling process, some of the water in the control group turned into ice, releasing heat that was transferred to the sample, causing the sample temperature to rise.

[0058] like Figure 6As shown, after both the experimental and control groups were refrigerated for forty hours, both control group 1 and control group 2 froze (the control group in the figure underwent a phase transition), while the experimental group did not freeze.

[0059] like Figure 7 As shown, after the experimental and control groups were left to stand for 1 hour under the same conditions, the crown pear samples in the control group showed yellowing and lower firmness. In contrast, the crown pear samples in the experimental group were similar in color and firmness to the fresh-cut samples.

[0060] Therefore, it can be seen that when using the supercooled refrigerator provided by the present invention to store vegetables and fruits, the magnetic field can increase the supercooling of the sample, allowing it to be stored at a sub-zero temperature without freezing, and can significantly improve the preservation effect of fruits and vegetables and extend the storage time.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A refrigerator suitable for ultra-low temperature preservation, characterized in that, The refrigerator includes a refrigerator body, which includes a refrigerator compartment. A first coil, a second coil, a third coil, and a fourth coil are spaced apart along a first direction inside the refrigerator compartment. The first coil and the second coil are adapted to generate a first magnetic field, the second coil and the third coil are adapted to generate a second magnetic field, and the third coil and the fourth coil are adapted to generate a third magnetic field. The magnetic field strength of the first magnetic field, the second magnetic field, and the third magnetic field ranges from 0 to 10 mT, and the frequency of the first magnetic field, the second magnetic field, and the third magnetic field ranges from 0 to 100 Hz. The distance between the first coil and the second coil is L1, the distance between the second coil and the third coil is L2, and the distance between the third coil and the fourth coil is L3; Where, L1:L2:L3 = (2~4):(0.5~1.5):(2~4); The number of turns in the first coil and the second coil is greater than the number of turns in the third coil and the fourth coil; The first coil is disposed at the top of the refrigerator compartment, and the fourth coil is disposed at the bottom of the refrigerator compartment; The refrigerator compartment is provided with a first partition and a second partition at intervals along a first direction, the second coil is disposed on the first partition, and the third coil is disposed on the second partition.

2. The refrigerator suitable for ultra-low temperature storage according to claim 1, characterized in that, The magnetic field strengths of the first magnetic field, the second magnetic field, and the third magnetic field are all 6 mT.

3. The refrigerator suitable for ultra-low temperature preservation according to claim 1, characterized in that, The frequencies of the first magnetic field, the second magnetic field, and the third magnetic field are 50 Hz.

4. The refrigerator suitable for ultra-low temperature preservation according to claim 1, characterized in that, L1:L2:L3 = 3:1:

3.

5. The refrigerator suitable for ultra-low temperature storage according to claim 1, characterized in that, The refrigerator compartment is provided with multiple slots spaced apart along the first direction.

6. The refrigerator suitable for ultra-low temperature preservation according to claim 1, characterized in that, The first partition and the second partition are provided with receiving grooves suitable for winding coils; Alternatively, the second coil may be embedded in the first partition, and the third coil may be embedded in the second partition.

7. The refrigerator suitable for ultra-cold temperature preservation according to any one of claims 1 to 4, characterized in that, The top of the refrigerator compartment is provided with a first receiving space, and a first cover plate is provided on one side of the first receiving space. The first coil is disposed in the first receiving space.

8. The refrigerator suitable for ultra-cold temperature preservation according to any one of claims 1 to 4, characterized in that, The bottom of the refrigerator compartment is provided with a second receiving space, and a second cover plate is provided on one side of the second receiving space. The fourth coil is disposed in the second receiving space.

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