Double C-shaped magnetic field for rotary room temperature magnetic refrigerator

Abstract

The present invention discloses a double C-shaped magnetic field for a rotary room temperature magnetic refrigerator, comprising: a yoke, a magnetic block array, and a rotating shaft; the yoke is an axisymmetric structure, and C-shaped structures are respectively arranged on both sides of the axis, the opening of the C-shaped structure is located at the side, and the rotating shaft is arranged at the axis position of the yoke; the magnetic block array is installed on the inner wall surface of the C-shaped structure, and the magnetic block array includes a plurality of magnetic monomers, and the combined magnetic monomers form a magnetic field air gap inside the opening, and the position of the magnetic field air gap is directly opposite to the opening. During installation, the present invention only needs to connect the rotating shaft in the middle of the magnetic field to the motor, and there is no need to adjust the magnetic field gap, thereby avoiding the difficulties and inconveniences caused by adjusting the magnetic field.

Description

Technical Field

[0001] The invention relates to a room temperature magnetic refrigeration technology, in particular to a double C-shaped magnetic field for a rotary room temperature magnetic refrigerator. Background Art

[0002] At present, magnetic refrigerators can be divided into reciprocating and rotary types according to the operation mode of the magnetic field. Among them, the reciprocating type has a low operating frequency and it is difficult to improve the refrigeration efficiency; the rotary magnetic refrigerator generally refers to a refrigerator in which the magnetic field or the refrigeration bed rotates, with a high rotation speed and relatively strong refrigeration capacity. Therefore, it is the most promising magnetic refrigerator to be industrialized and applied in real life.

[0003] The existing magnetic field system of a rotary magnetic refrigerator includes: a yoke and a magnetic block filled inside. The size of the air gap can be adjusted by adjusting the distance between the magnetic field and the magnetic conductive block on the left and right sides. The magnetic field system has a complex structure, large volume and mass. The design adopts a solution in which the magnetic field is stationary and the cooling bed rotates, which makes the heat exchange system very complicated. At the same time, the magnetic field is difficult to install and subsequent adjustments are extremely inconvenient, which seriously restricts the development of the industrialization of rotary magnetic refrigerators. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a double C-shaped magnetic field for a rotary room-temperature magnetic refrigerator. During installation, it is only necessary to connect the rotating shaft in the middle of the magnetic field to the motor without adjusting the magnetic field gap, thus avoiding the difficulties and inconveniences caused by adjusting the magnetic field.

[0005] The technical solution is as follows:

[0006] A double C-shaped magnetic field for a rotary room-temperature magnetic refrigerator comprises: a yoke, a magnetic block array, and a rotating shaft; the yoke is an axisymmetric structure, with C-shaped structures respectively arranged on both sides of the axis, the opening of the C-shaped structure is located at the side, and the rotating shaft is arranged at the axis position of the yoke; the magnetic block array is installed on the inner wall surface of the C-shaped structure, the magnetic block array comprises a plurality of magnetic monomers, and the combined magnetic monomers form a magnetic field air gap on the inner side of the opening, and the position of the magnetic field air gap is directly opposite to the opening.

[0007] Furthermore, the shape of the magnetic monomer is a hexahedral structure.

[0008] Furthermore, the material of the magnetic monomer is NdFeB magnet.

[0009] Furthermore, yoke plates are arranged on the front and rear sides of the yoke, and the yoke plates are provided with plate openings at positions located at the openings and the magnetic field air gap.

[0010] Furthermore, after multiple magnetic monomers are assembled, a C-shaped magnetic field is formed, and the two C-shaped magnetic fields are mirror-symmetric in space.

[0011] Furthermore, the magnetization angle of each magnetic monomer is different, and the angle between the magnetization directions of two adjacent magnetic monomers is 45°.

[0012] Furthermore, the magnetic field angle of the magnetic monomer close to the opening is 45°, and the thickness is smaller than the thickness of the magnetic monomer on the inner side.

[0013] Furthermore, the yoke is provided with an axial through hole at the axial position, and the rotating shaft is installed in the axial through hole.

[0014] Furthermore, the C-shaped structure is provided with an arc surface groove on the side, and the two C-shaped structures are fixed on the rotating shaft by using the arc surface groove.

[0015] Furthermore, the structure of the yoke is a symmetrical fan-shaped structure, the two magnetic block arrays are respectively arranged on one side of the arc edge of the fan-shaped structure, and the axial through hole is arranged at the connection point of the two fan-shaped structures.

[0016] The technical effects of the present invention include:

[0017] The double C-shaped magnetic field proposed in the present invention has the characteristics of simple structure, small volume, high magnetic field strength, simple installation and debugging, etc., which greatly reduces the volume and cost of the magnetic field while ensuring efficiency and magnetic field strength. When installing the magnetic field, it is only necessary to connect the rotating shaft in the middle of the magnetic field to the motor, and there is no need to adjust the magnetic field gap, thus avoiding the difficulties and inconveniences caused by adjusting the magnetic field. At the same time, the present invention is that the magnetic field rotates and the magnetic working fluid bed is stationary. When the magnetic field rotates, the two groups of magnetic working fluid beds can be magnetized or demagnetized at the same time, thereby greatly simplifying the complexity of the heat exchange system of the rotary magnetic refrigerator and indirectly improving the refrigeration capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structure diagram of a double C-shaped magnetic field system for a rotary room temperature magnetic refrigerator in the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the double C-shaped magnetic field in the present invention. DETAILED DESCRIPTION

[0020] The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce the invention.

[0021] like Figure 1 The figure shows a schematic cross-sectional structure of a double C-shaped magnetic field used in a rotary room temperature magnetic refrigerator of the present invention.

[0022] A double C-shaped magnetic field for a rotary room temperature magnetic refrigerator comprises: a yoke 1, a magnetic block array 2, and a rotating shaft 3.

[0023] The yoke 1 has two functions: (1) fixing the magnetic block; (2) shielding the magnetic field. The yoke 1 is an axisymmetric structure, with a C-shaped structure disposed on both sides of the axis, and the opening 11 of the C-shaped structure is located on the side.

[0024] The yoke 1 is provided with a rotating shaft 3 at the axial position, and the rotating shaft 3 is welded to the bottom of the yoke 1. Of course, an arc groove can also be provided on the side wall of the C-shaped structure, and then the two C-shaped structures are fixed on the rotating shaft 3 by using the arc groove. The yoke 1 can also be provided with an axial through hole at the axial position, and the rotating shaft 3 is installed in the axial through hole.

[0025] The magnetic block array 2 includes a plurality of magnetic monomers 21, and the shape of the magnetic monomers 21 is a hexahedral structure; the plurality of magnetic monomers 21 are installed on the inner wall surface of the C-shaped structure, forming a magnetic field air gap 22 inside the opening 11, and the position of the magnetic field air gap 22 is directly opposite to the opening 11. The material of the magnetic block array 2 is NdFeB magnet. In order to further shield the magnetic field and fix the magnetic block array 2, a yoke plate is arranged before and after the yoke 1, and the yoke plate is provided with a plate opening at the position of the opening 11 and the magnetic field air gap. The thickness of the yoke 1 and the yoke plate is 3mm.

[0026] Among the multiple magnetic monomers 21, each magnetic monomer 21 has a different magnetization angle. After the multiple magnetic monomers 21 are assembled, two C-shaped magnetic fields are formed, and the two C-shaped magnetic fields are mirror-symmetrical in space. The magnetic field air gap 22 is the working space of the double C-shaped magnetic field. The angle between the magnetization directions of two adjacent magnetic monomers 21 is 45°. When the seven magnetic monomers 21 are assembled in sequence, a magnetic field of a certain intensity will be generated in the magnetic field air gap, which has the effect of strengthening the intensity of the central magnetic field. The assembly of the magnetic monomers 21 is based on the Halbach rotation theory, with horizontal right as positive, and the assembly order of the magnetic monomers 21 of the right C-shaped magnetic field is: 45°, 90°, 135°, 180°, 225°, 90°, 135°. The angle between the magnetic field angle of the four magnetic monomers 21 close to the opening 11 and the axis is 45v, and the directions of the two magnetic monomers 21 on both sides of the opening 11 are opposite, and the thickness is less than the thickness of other magnetic monomers 21.

[0027] like Figure 2 The figure shows a schematic diagram of the structure of the double C-shaped magnetic field in the present invention.

[0028] The yoke 1 can be designed into various shapes to adapt to different rotary room temperature magnetic refrigerators. The structure of the yoke 1 is a symmetrical fan-shaped structure, the magnetic block array 2 is fixed near the arc edge of the fan-shaped structure, and the rotation axis is set at the connection point of the two fan-shaped structures, at the bottom of the magnetic field system. In this way, the distance between the two magnetic block arrays 2 is increased, and the length of the magnetic field air gap 22 is increased to extend the magnetization time of the magnetic working medium bed and enhance the cooling and heating effects.

[0029] When in use, the assembled double C-shaped magnetic field is installed on the frame, and the rotating shaft 3 is connected to the motor. Four magnetic working fluid beds are arranged on the track of magnetic field rotation around the frame, and the center of the magnetic field air gap 22 coincides with the center of the magnetic working fluid bed. When the double C-shaped magnetic field rotates driven by the motor, at the same time, two magnetic monomers 21 enter the magnetic field air gap 22 to be magnetized and release heat to the outside; the other two magnetic monomers 21 leave the magnetic field air gap 22 to demagnetize and generate cooling.

[0030] The terms used in the present invention are illustrative and exemplary, rather than restrictive. Since the present invention can be implemented in various forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A double C-shaped magnetic field for a rotary room temperature magnetic refrigerator, characterized in that: include: A yoke, a magnetic block array, and a rotating shaft; the yoke is an axis-symmetrical fan-shaped structure, with C-shaped structures respectively arranged on both sides of the axis, the opening of the C-shaped structure is located on the side, and two magnetic block arrays are respectively arranged on one side of the arc edge of the fan-shaped structure; the yoke is provided with an axial through hole at the axis position, the axial through hole is arranged at the connection point of the two fan-shaped structures, the rotating shaft is installed in the axial through hole, and the rotating shaft is arranged at the axis position of the yoke; yoke plates are arranged on the front and back sides of the yoke, and the yoke plates are provided with flat plate openings at the positions of the opening and the magnetic field air gap; the magnetic block array is installed on the inner wall surface of the C-shaped structure, the magnetic block array includes a plurality of magnetic monomers, each magnetic monomer has a different magnetization angle, and the angle between the magnetization directions of two adjacent magnetic monomers is 45°. After the plurality of magnetic monomers are assembled, a C-shaped magnetic field is formed, and the two C-shaped magnetic fields are mirror-symmetrical in space. The combined magnetic monomers form a magnetic field air gap on the inner side of the opening, and the position of the magnetic field air gap is directly opposite to the opening.

2. The double C-shaped magnetic field for a rotary room temperature magnetic refrigerator according to claim 1, characterized in that: The shape of the magnetic monomer is a hexahedral structure.

3. The double C-shaped magnetic field for a rotary room temperature magnetic refrigerator according to claim 1, characterized in that: The material of the magnetic monomer is NdFeB magnet.

4. The double C-shaped magnetic field for a rotary room temperature magnetic refrigerator as claimed in claim 1, characterized in that: The magnetic field angle of the magnetic monomer near the opening is 45°, and the thickness is smaller than the thickness of the magnetic monomer inside.

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