WO2019150817A1

WO2019150817A1 - Magnetic heat pump device

Info

Publication number: WO2019150817A1
Application number: PCT/JP2018/046912
Authority: WO
Inventors: 裕介山口; 相哲 ▲裴▼
Original assignee: サンデンホールディングス株式会社
Priority date: 2018-01-31
Filing date: 2018-12-20
Publication date: 2019-08-08
Also published as: JP2019132551A

Abstract

[Problem] To provide a magnetic heat pump device that makes it possible to improve the magnetic flux density obtained per permanent-magnet mass. [Solution] A magnetic heat pump device provided with: a permanent magnet 20 that can be rotated about a central axis CS of a rotating shaft 32, and the magnetization direction of an N-pole and an S-pole of which is parallel to a direction orthogonal to an axial direction of the central axis CS; a material container 22 that is arranged so as to surround the outer periphery of the permanent magnet 20 and that has a magnetic material 34 accommodated in the interior; and at least a pair of built-in yokes 26 that are respectively in contact with surfaces of different polarities of the permanent magnet 20 and that are separated from one another. The material container 22 is made of resin, and the built-in yokes 26 are ferromagnets and each have a portion that is closer to the material container 22 than the permanent magnet 20.

Description

Magnetic heat pump device

The present invention relates to a magnetic heat pump apparatus using a magnetocaloric effect.

As a technique of the magnetic heat pump apparatus using the magnetocaloric effect, there is a technique described in Patent Document 1, for example.
The technique described in Patent Document 1 is formed using a permanent magnet rotatably arranged, a magnetic material, a material container surrounding the outer periphery of the permanent magnet, and a ferromagnetic material such as SUS, A frame body (yoke) for accommodating the material container is provided. Then, by rotating the permanent magnet inside the container accommodated in the frame, the magnetic material is excited and demagnetized between the permanent magnet and the yoke, and the direction in which the heat exchange medium flows at the timing of excitation and demagnetization is changed. By switching, heat and cold are obtained.

JP 2013-204984 A

However, in the configuration in which the yoke is formed using a ferromagnetic material as in the technique described in Patent Document 1, the flow of magnetic flux passes through the magnetic material from the permanent magnet and is folded back by the yoke. The flow returns to the permanent magnet after passing through. For this reason, the magnetic circuit through which the magnetic flux flows is formed by the permanent magnet, the magnetic material, and the yoke, so that the flow of the magnetic flux is not concentrated and the magnetic flux density obtained per mass of the permanent magnet is reduced. There is.
The present invention has been made paying attention to the above-described problems, and an object thereof is to provide a magnetic heat pump device capable of improving the magnetic flux density obtained per mass of a permanent magnet.

In order to solve the above problems, one aspect of the present invention is a magnetic heat pump device including a permanent magnet, a material container, and at least a pair of built-in yokes. The permanent magnet is rotatable around the central axis of the rotation axis, and the magnetization direction of the N pole and the S pole is parallel to the direction orthogonal to the axial direction of the central axis. The material container is made of resin, is disposed so as to surround the outer periphery of the permanent magnet, and contains a magnetic material therein. The built-in yokes are in contact with the surfaces of the permanent magnets having different polarities, and are separated from each other. In addition, the built-in yoke is a ferromagnetic body and has a portion closer to the material container than the permanent magnet.

According to one aspect of the present invention, the magnetic flux flows from the north pole of the permanent magnet to one of the pair of built-in yokes, the magnetic material accommodated in the material container, and the other of the pair of built-in yokes. It goes through the order and reaches the south pole of the permanent magnet.
As a result, the magnetic circuit can be formed by a permanent magnet, a magnetic material, and a pair of built-in yokes, and the magnetic flux flow can be concentrated to improve the magnetic flux density obtained per mass of the permanent magnet. A possible magnetic heat pump device can be provided.

It is an exploded view showing the structure of the magnetic heat pump apparatus in 1st embodiment of this invention. It is a figure showing the structure of a main-body part. It is a figure showing the operation | movement performed using the magnetic heat pump apparatus in 1st embodiment of this invention. It is a figure showing the modification of a main-body part. It is a figure showing the modification of a main-body part. It is a figure showing the modification of a main-body part.

A first embodiment of the present invention will be described below with reference to the drawings. In the description of the drawings referred to in the following description, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that the drawings include portions having different dimensional relationships and ratios.

Furthermore, the first embodiment shown below exemplifies a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention is the material of the component parts, their shapes, The structure, arrangement, etc. are not specified below. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims. Further, the directions of “left and right” and “up and down” in the following description are merely definitions for convenience of description, and do not limit the technical idea of the present invention. Thus, for example, if the paper is rotated 90 degrees, “left and right” and “up and down” are read interchangeably, and if the paper is rotated 180 degrees, “left” becomes “right” and “right” becomes “left”. Of course it becomes.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
(Constitution)
As shown in FIG. 1, the magnetic heat pump device 1 includes a main body portion 2, two communication hole plates 4, two rotating disks 6, two end face plates 8, a circulation pump 10, and a heat radiation side heat exchange. And an endothermic heat exchanger 14. In addition, in FIG. 1, the main-body part 2 is simplified and illustrated.

As shown in FIG. 2, the main body 2 includes one permanent magnet 20, a plurality of material containers 22, a plurality of inter-material yokes 24, a pair of built-in yokes 26, a pair of spacers 28, and a single spacer. A main body container 30 is provided. The detailed configuration of the main body 2 will be described later. FIG. 2 is a view of the main body 2 viewed from the direction in which the main body 2, the communication hole plate 4, the rotating disk 6, and the end face plate 8 are arranged. Moreover, in FIG.1 and FIG.2, only the material container 22 is shown with sectional drawing for description.

The two communication hole plates 4 are respectively fixed to two openings of the main body 2. Thereby, the two communication hole plates 4 block the opening of the main body 2.
Each communication hole plate 4 is formed with a plurality of communication holes 40 communicating with the main body 2.
The plurality of communication holes 40 include, for example, a plurality of outer peripheral side communication holes 40 a disposed on the outer peripheral side of the communication hole plate 4 and a plurality of inner peripheral side communication holes 40 b disposed on the inner peripheral side of the communication hole plate 4. Composed.
The outer end side communication hole 40 a and the inner peripheral side communication hole 40 b are respectively attached to open ends of the in-container pipe 16 that is a pipe disposed inside the material container 22. The in-container pipes 16 are arranged in pairs for one material container 22. One open end of the two in-container pipes 16 is attached to the outer peripheral side communication hole 40a. The other open end of the two in-container pipes 16 is attached to the inner peripheral side communication hole 40b.

In FIG. 1, for the sake of explanation, only the in-container pipes 16 arranged inside the two material containers 22 among the plurality of material containers 22, that is, only four in-container pipes 16 are illustrated. Yes. In FIG. 1, the in-container piping 16 is not shown inside the material container 22 for the sake of explanation. Further, in FIG. 1, for the sake of explanation, the state in which the open ends of the in-container piping 16 are attached to the outer peripheral side communication hole 40 a and the inner peripheral side communication hole 40 b is represented by an image.
Moreover, the number of the communicating holes 40 illustrated in FIG. 1 is an example, and does not necessarily match the actual number provided in the magnetic heat pump device 1 of the first embodiment.

The two rotating disks 6 are respectively arranged to face the opening of the main body 2 with the communication hole plate 4 interposed therebetween, and are in contact with the communication hole plate 4.
Each rotating disk 6 rotates in synchronization with the permanent magnet 20.
Each rotary disk 6 has a plurality of notches 60 opened as valve ports.
The plurality of notches 60 include, for example, a plurality of outer periphery-side notches 60 a disposed on the outer peripheral side of the rotating disk 6 and a plurality of inner periphery-side notches 60 b disposed on the inner peripheral side of the rotating disk 6. The

Both the outer peripheral side notch 60a and the inner peripheral side notch 60b are formed in a slit shape extending along the circumferential direction of the rotating disk 6, and the outer peripheral side notch 60a and the inner peripheral side notch 60b The supply control of the working fluid is performed.
Moreover, the number of the notches 60 illustrated in FIG. 1 is an example, and does not necessarily match the actual number provided in the magnetic heat pump device 1 of the first embodiment.
The two end face plates 8 are arranged to face the opening of the main body 2 with the rotating disk 6 and the communication hole plate 4 interposed therebetween, and are in contact with the rotating disk 6.

Each end face plate 8 is connected to an outer peripheral side pipe 80a and an inner peripheral side pipe 80b.
As described above, the main body 2, the communication hole plate 4 and the end face plate 8 do not rotate, and only the rotating disk 6 rotates in synchronization with the permanent magnet 20.
The discharge side of the circulation pump 10 communicates with an outer peripheral side pipe 80a connected to the end face plate 8a. The end face plate 8a is one of the two end face plates 8 (left end face plate in FIG. 1).

The inlet of the heat radiation side heat exchanger 12 communicates with the inner peripheral side pipe 80b connected to the end face plate 8a.
The outlet of the heat radiation side heat exchanger 12 communicates with the suction side of the circulation pump 10 through a pipe.
The inlet of the heat absorption side heat exchanger 14 communicates with the outer peripheral side pipe 80a connected to the end face plate 8b. The end face plate 8b is the other of the two end face plates 8 (the right end face plate in FIG. 1).
The outlet of the heat absorption side heat exchanger 14 communicates with the inner peripheral side pipe 80b connected to the end face plate 8b.

(permanent magnet)
The permanent magnet 20 is fixed to the rotating shaft 32. The rotating shaft 32 is rotated by a motor (not shown). Therefore, the permanent magnet 20 is formed to be rotatable around the central axis CS of the rotating shaft 32. In addition, in FIG. 1, illustration of the rotating shaft 32 is abbreviate | omitted for description.
As shown in FIG. 2, the shape of the permanent magnet 20 is square (rectangular) when viewed from the axial direction of the rotating shaft 32. That is, the permanent magnet 20 is formed in a square shape when viewed from the axial direction of the rotary shaft 32.

The permanent magnet 20 has a pair of N and S poles, and the magnetization direction of the N and S poles is parallel to the direction orthogonal to the axial direction of the central axis CS. In FIG. 2, the N pole is illustrated as “N”, and the S pole is illustrated as “S”.
The center of gravity of the permanent magnet 20 overlaps the central axis CS of the rotating shaft 32 when viewed from the axial direction of the rotating shaft 32. That is, when viewed from the axial direction of the rotating shaft 32, the center axis CS and the center of gravity of the permanent magnet 20 overlap.

(Material container)
The plurality of material containers 22 are made of resin (for example, made of ABS resin), and a magnetic material 34 is accommodated therein.
Further, the plurality of material containers 22 are arranged at intervals along the circumferential direction of the rotation shaft 32 so as to surround the outer periphery of the permanent magnet 20.
The number of material containers 22 is an odd number. In the first embodiment, a case where the number of material containers 22 is 15 will be described as an example.

The material container 22 is formed in a square shape (square) when viewed from the axial direction of the rotation shaft 32.
Although not particularly illustrated, each material container 22 is positioned by, for example, a protrusion provided on the surface of the communication hole plate 4 facing the main body 2.
In addition, the in-container piping 16 shown in FIG. 1 is arranged inside the material container 22 so as to pass through the magnetic material 34. In FIG. Illustration of the piping 16 is omitted.

(Material yoke)
The plurality of inter-material yokes 24 are respectively disposed between adjacent material containers 22. Specifically, each material yoke 24 is in contact with the adjacent material container 22.
The inter-material yoke 24 is formed using a metal material such as SUS, and is a ferromagnetic material.
The number of inter-material yokes 24 is an odd number that is the same as the number of material containers 22. In the first embodiment, as an example, since the number of material containers 22 is 15, a case where the number of inter-material yokes 24 is also 15 will be described.
Therefore, the magnetic heat pump device 1 according to the first embodiment includes 15 pairs formed by a pair of adjacent material containers 22 and an inter-material yoke 24.
Further, the inter-material yoke 24 is formed in a trapezoidal shape when viewed from the axial direction of the rotary shaft 32.
Although not particularly illustrated, each material yoke 24 is positioned by, for example, a protrusion provided on the surface of the communication hole plate 4 facing the main body 2 as in the material container 22.

(Built-in yoke)
The pair of built-in yokes 26 are both made of a metal material such as SUS, and are ferromagnetic.
The pair of built-in yokes 26 are in contact with the surface of the permanent magnet 20 whose polarity is the N pole and the surface of the permanent magnet 20 whose polarity is the S pole, and are separated from each other. The built-in yoke 26 is attached to the permanent magnet 20 using an adhesive or the like.
In the first embodiment, as an example, each of the pair of built-in yokes 26 has a rectangular shape when viewed from the axial direction of the rotating shaft 32 among the permanent magnets 20 formed in a rectangular shape when viewed from the axial direction of the rotating shaft 32. The case where it contacts the surface which forms a long side is demonstrated.

In FIG. 2 and the following description, the built-in yoke 26 that is in contact with the surface of the permanent magnet 20 that is N-pole is defined as the N-pole-side built-in yoke 26a. Similarly, in FIG. 2 and the following description, the built-in yoke 26 that is in contact with the surface of the permanent magnet 20 having the south pole is defined as the south pole-side built-in yoke 26b.
The north pole side built-in yoke 26 a has two projecting portions 36 a that are closer to the material container 22 than the permanent magnet 20.
The S pole-side built-in yoke 26b has two projecting portions 36b that are closer to the material container 22 than the permanent magnet 20 as in the N-pole side built-in yoke 26a.

The distance (gap) between the protruding portion 36a and the protruding portion 36b and the material container 22 is set according to the magnetic flux density required for the magnetic heat pump device 1, for example. In addition to this, for example, according to a value capable of avoiding contact between the protruding portion 36a and the protruding portion 36b and the material container 22 caused by swinging of the rotating shaft 32 when the permanent magnet 20 is rotated. To set.
The distance (interval) between the projecting portion 36a and the projecting portion 36b is such that the distance between the projecting portion 36a and the distance between the projecting portions 36b with respect to two inter-material yokes 24 adjacent to one material container 22 is equal to each other. Set to a value. The distance and shape between the projecting portion 36a and the projecting portion 36b are set to a distance and shape that does not affect the flow of magnetic flux MF through the spacer 28.

(Spacer)
The pair of spacers 28 are made of resin (for example, made of ABS resin).
As shown in FIG. 2, the shape of the spacer 28 is square (rectangular) when viewed from the axial direction of the rotary shaft 32.
The pair of spacers 28 are both arranged between the pair of built-in yokes 26 (N-pole side built-in yoke 26a and S-pole side built-in yoke 26b). Each spacer 28 is attached to the built-in yoke 26 using an adhesive or the like.
Furthermore, both the pair of spacers 28 are formed in a shape in which the distance from the material container 22 does not become shorter than the distance between the protruding portion 36 a and the protruding portion 36 b and the material container 22.
The pair of spacers 28 are both in contact with the permanent magnet 20.

(Main body container)
The main body container 30 is made of resin (for example, made of ABS resin).
The main body container 30 has a cylindrical shape. The axial direction of the main body container 30 is parallel to the axial direction of the rotation shaft 32.
Inside the main body container 30, a permanent magnet 20, a material container 22, an inter-material yoke 24, a built-in yoke 26, and a spacer 28 are accommodated.

(Operation)
An example of the operation of the first embodiment will be described with reference to FIGS. 1 and 2 and FIG.
When the magnetic heat pump device 1 is used, as shown in FIG. 3, the magnitude of the magnetic field applied to the material container 22a increases when the permanent magnet 20 and the built-in yoke 26 are at 0 °. . Thereby, the magnetic material 34 accommodated in the material container 22a is excited and the temperature rises. The material container 22a is the material container 22 disposed between the inter-material yoke 24a closest to the protruding portion 36a and the inter-material yoke 24b closest to the protruding portion 36b.

On the other hand, since the magnitude of the magnetic field applied to the plurality of material containers 22b disposed at positions different from the phases of the permanent magnet 20 and the built-in yoke 26 at 0 ° is reduced, the magnetic field is accommodated in the material container 22b. The magnetic material 34 is demagnetized and the temperature is lowered. In FIG. 3, for the purpose of explanation, two selected material containers 22 out of a plurality of material containers 22 arranged at a position different from the phase of the permanent magnet 20 and the built-in yoke 26 at 0 ° are shown. Only the material container 22b is illustrated.

Further, in a state where the positions of the permanent magnet 20 and the built-in yoke 26 are 0 °, for example, the outer peripheral side communication hole 40a, the outer peripheral side notch 60a, and the outer peripheral side pipe 80a are communicated.
Then, by operating the circulation pump 10, the medium (for example, water) is passed from the discharge side of the circulation pump 10 through the outer peripheral side pipe 80a, the outer peripheral side notch 60a, and the outer peripheral side communication hole 40a in this order. The in-container piping 16 arranged inside the material container 22b is passed. Further, the medium is moved to the heat absorption side heat exchanger 14 through the outer peripheral side communication hole 40a, the outer peripheral side notch 60a, and the outer peripheral side pipe 80a in this order.

Next, the medium moved to the heat absorption side heat exchanger 14 is arranged inside the material container 22a through the inner circumference side pipe 80b, the inner circumference side cutout 60b, and the inner circumference side communication hole 40b in this order. The in-container piping 16 is passed. Further, the medium is moved to the heat radiation side heat exchanger 12 through the inner circumference side communication hole 40b, the inner circumference side cutout 60b, and the inner circumference side pipe 80b in this order. Then, the medium moved to the heat radiation side heat exchanger 12 is moved to the suction side of the circulation pump 10 through the pipe.
When the medium is circulated through the above-described path, the medium that has moved to the heat radiation side heat exchanger 12 releases the heat of work to the outside (outside air or the like). On the other hand, the medium that has moved to the heat absorption side heat exchanger 14 absorbs heat from an object to be cooled (not shown) that contacts the heat absorption side heat exchanger 14 to cool the object to be cooled.

Therefore, the cooled medium absorbs heat from the object to be cooled by the heat absorption side heat exchanger 14 by dissipating heat to the material container 22b containing the magnetic material 34 that has been demagnetized and the temperature has decreased. In addition, the medium that has cooled the object to be cooled absorbs heat from the material container 22a that contains the magnetic material 34 that has been excited to increase the temperature, thereby cooling the magnetic material 34 contained in the material container 22a. It moves to the heat radiation side heat exchanger 12. The medium that has moved to the heat radiation side heat exchanger 12 releases the heat of work to the outside (outside air or the like).
Here, in the first embodiment, the N-pole side built-in yoke 26a and the S-pole side built-in yoke 26b, which are ferromagnetic materials, are in contact with the surfaces of the permanent magnet 20 having different polarities, and are separated from each other. . In addition, the N pole side built-in yoke 26 a has a protruding portion 36 a that is closer to the material container 22 than the permanent magnet 20, and the S pole side built-in yoke 26 b is closer to the material container 22 than the permanent magnet 20. It has the protrusion part 36b which is a part.

For this reason, when the magnetic material 34 accommodated in the two material containers 22 closest to the projecting portion 36a and the projecting portion 36b is excited, the flow of magnetic flux MF causes the main body container 30 to pass through as shown in FIG. The flow does not go through. That is, the magnetic flux MF is changed from the N pole of the permanent magnet 20 to the N pole side built-in yoke 26a, the inter-material yoke 24a, the magnetic material 34 accommodated in the material container 22, the inter-material yoke 24b, and the S pole-side built-in yoke. The flow reaches the south pole of the permanent magnet 20 through the 26b in order.
Thereby, the magnetic circuit through which the magnetic flux flows can be formed by the permanent magnet 20, the magnetic material 34, the two

inter-material yokes

24a and 24b, and the pair of built-in

yokes

26a and 26b.

Therefore, compared with the case where a magnetic circuit is formed with the permanent magnet 20, the magnetic material 34, and the main body container 30, it becomes possible to concentrate the flow of magnetic flux, and the magnetic flux obtained per mass of the permanent magnet 20 is obtained. The density can be improved.
The above-described first embodiment is an example of the present invention, and the present invention is not limited to the above-described first embodiment, and the present invention may be applied to other forms than this embodiment. Various modifications can be made according to the design or the like as long as they do not depart from the technical idea.

(Effects of the first embodiment)
If it is the magnetic heat pump apparatus 1 of 1st embodiment, it will become possible to show the effect described below.
(1) The pair of built-in

yokes

26a and 26b that are in contact with the surfaces of the permanent magnet 20 having different polarities and are separated from each other are ferromagnetic and are closer to the material container 22 than the permanent magnet 20 is. It has a certain protruding portion 36.
Therefore, a magnetic circuit through which magnetic flux flows can be formed by the permanent magnet 20, the magnetic material 34, and the pair of built-in

yokes

26a and 26b.
As a result, it is possible to concentrate the flow of magnetic flux as compared with the case where the magnetic circuit is formed by the permanent magnet 20, the magnetic material 34, and the main body container 30. Thereby, it becomes possible to provide the magnetic heat pump device 1 capable of improving the magnetic flux density obtained per mass of the permanent magnet 20.

(2) The material container 22 is a plurality of material containers 22 arranged at intervals along the circumferential direction of the rotation shaft 32, and a plurality of inter-material yokes 24 arranged between adjacent material containers 22 It is a ferromagnetic material.
Therefore, the magnetic circuit through which the magnetic flux flows includes a permanent magnet 20, a magnetic material 34, two

inter-material yokes

24a and 24b adjacent to the material container 22 containing the magnetic material 34, and a pair of built-in

yokes

26a and 26b. Can be formed.
As a result, the magnetic material accommodated in the material container 22 disposed between the two

inter-material yokes

24a and 24b only when the pair of built-in

yokes

26a and 26b are close to the two inter-material yokes 24a and 24b. 34 is excited. Thereby, since it becomes possible to change a magnetic flux rapidly at the time of switching between excitation and demagnetization, it becomes possible to obtain hot and cold efficiently.

In addition, it is possible to prevent contact between adjacent material containers 22, which prevents contact between the material container 22 that has been heated by excitation and the material container 22 that has been cooled by demagnetization, and is generated by heat transfer. Loss can be reduced. Thereby, it becomes possible to obtain hot and cold efficiently.
Further, the shape of the material container 22 can be simplified as compared with the configuration in which the material container 22 is entirely in contact with the inner diameter surface of the main body container 30, and the shapes of the magnetic material 34 and the material container 22 can be changed. When changing, it is possible to improve the degree of freedom of design and the like.

Also, in the straight pipe type magnetic heat pump device 1, it is possible to realize a structure in which the material container 22 is sandwiched between ferromagnetic materials. This makes it possible to realize a configuration in which the material container 22 is linearly extended along the axial direction of the rotary shaft 32, which is difficult with a disk-type magnetic circuit having a known configuration. For this reason, it becomes possible to utilize the structure which laminated | stacked the magnetic material 34, and it becomes possible to expand the range of the temperature which can generate | occur | produce with the magnetic heat pump apparatus 1. FIG.

(3) The number of the material containers 22 and the inter-material yokes 24 is the same, odd number.
As a result, since the cogging torque generated when the permanent magnet 20 and the built-in yoke 26 are rotated can be reduced, the permanent magnet 20 and the built-in yoke 26 can be smoothly rotated. Can be improved.
(4) The main body container 30 that houses the permanent magnet 20 and the material container 22 is made of resin.
For this reason, it becomes possible to reduce the eddy current which generate | occur | produces in the main body container 30 which forms the outermost layer of the main-body part 2, and it becomes possible to suppress the heat_generation | fever of the main body container 30. FIG.
As a result, compared to the configuration in which the main body container 30 is made of a ferromagnetic material, it becomes easier to obtain a low temperature, so that the capability of the magnetic heat pump device 1 can be improved.

(5) A spacer 28 made of resin is disposed between the pair of built-in

yokes

26a and 26b.
As a result, contact between the pair of built-in

yokes

26a and 26b can be prevented, and the flow of magnetic flux can be normalized.
In addition, air resistance generated when the permanent magnet 20 and the built-in yoke 26 are rotated can be reduced, and the capability of the magnetic heat pump device 1 can be improved.
Furthermore, wind noise generated when the permanent magnet 20 and the built-in yoke 26 are rotated can be suppressed, and the quietness of the magnetic heat pump device 1 can be improved.

(6) The permanent magnet 20 is formed in a square shape when viewed from the axial direction of the rotary shaft 32.
As a result, the amount of resources used as the material of the permanent magnet 20 can be reduced as compared with the case where the shape of the permanent magnet 20 is a shape in which the permanent magnet 20 is opposed to the material container 22 to generate magnetic flux. It becomes possible, and it becomes possible to reduce cost.
Further, since the shape of the permanent magnet 20 is a simple shape, the permanent magnet 20 can be easily manufactured, and the cost can be reduced.

(7) When viewed from the axial direction of the rotating shaft 32, the center axis CS of the rotating shaft 32 and the center of gravity of the permanent magnet 20 overlap.
As a result, compared to a configuration in which the center axis CS of the rotating shaft 32 and the center of gravity of the permanent magnet 20 are shifted, it is possible to reduce the oscillation that occurs when the permanent magnet 20 and the built-in yoke 26 rotate. The capability of the magnetic heat pump device 1 can be improved.
(8) The material container 22 is formed in a square shape when viewed from the axial direction of the rotary shaft 32.
As a result, compared with the case where the shape of the material container 22 is a shape having a tile-shaped portion along the inner diameter surface of the main body container 30, it is possible to simplify the manufacture of the material container 22 and reduce the cost. It can be reduced.

(Modification of the first embodiment)
(1) In the first embodiment, the configuration includes the pair of built-in yokes 26 that are in contact with the N-pole surface and the S-pole surface of the single permanent magnet 20, but the present invention is not limited to this.
That is, for example, as shown in FIG. 4, the rotating block 38 a and the four permanent magnets 20 a to 20 d may be provided, and the four pairs of built-in yokes 26 in contact with the permanent magnets 20 may be provided.
The rotary block 38 a is formed in a square shape when viewed from the axial direction of the rotary shaft 32, and is fixed to the rotary shaft 32. Further, the center of gravity of the rotating block 38 a overlaps the center axis when viewed from the axial direction of the rotating shaft 32.

The four permanent magnets 20a to 20d are formed in a square (rectangular shape) when viewed from the axial direction of the rotary shaft 32, and are attached to the four sides of the rotary block 38a when viewed from the axial direction of the rotary shaft 32, respectively. It has been.
The four pairs of built-in yokes 26 are a pair of built-in yoke 26a and built-in yoke 26b that are in contact with the N pole surface and the S pole surface of the permanent magnet 20a, respectively, and the N pole surface and the S pole of the permanent magnet 20b. It includes a pair of a built-in yoke 26c and a built-in yoke 26d that are in contact with the surface. The four pairs of built-in yokes 26 are a pair of built-in yoke 26e and built-in yoke 26f that are in contact with the N pole surface and S pole surface of the permanent magnet 20c, respectively, and the N pole surface and S of the permanent magnet 20d. It includes a pair of built-in yoke 26g and built-in yoke 26h that are in contact with the pole surfaces, respectively.

In the configuration shown in FIG. 4, since the magnetic pole is changed from two poles to four poles as compared with the configuration including one permanent magnet 20 and a pair of built-in yokes 26, per rotation of the permanent magnet 20 and the built-in yoke 26. Thus, it is possible to double the area to be excited and demagnetized.
For this reason, it becomes possible to reduce the rotational speed of the rotating shaft 32, to improve the quietness of the magnetic heat pump device 1, and to reduce COP (coefficient of performance).

Further, for example, as shown in FIG. 5, the rotary block 38 b, the three plates 50, and the three permanent magnets 20 a to 20 c are provided, and the three pairs of built-in yokes 26 that are in contact with the permanent magnets 20 are provided. It is good also as a structure.
The rotating block 38 b is formed in an equilateral triangle when viewed from the axial direction of the rotating shaft 32, and is fixed to the rotating shaft 32. Further, the center of gravity of the rotating block 38 b overlaps with the central axis when viewed from the axial direction of the rotating shaft 32.
The three plates 50 are formed in a plate shape, and are respectively attached to three sides of the rotary block 38 b when viewed from the axial direction of the rotary shaft 32. The thickness of the plate 50 is set to a value at which the N and S poles of the two permanent magnets 20 adjacent to each other in the direction along the axis of the rotary shaft 32 have a distance that does not affect each other. .

The three permanent magnets 20a to 20c are formed in a square shape (rectangular shape) when viewed from the axial direction of the rotary shaft 32, and are respectively surfaces facing the rotary block 38b of the plate 50 when viewed from the axial direction of the rotary shaft 32. It is attached to the opposite surface.
The three pairs of built-in yokes 26 are a pair of built-in yoke 26a and built-in yoke 26b that respectively contact the N-pole surface and S-pole surface of the permanent magnet 20a, and the N-pole surface and S-pole of the permanent magnet 20b. It includes a pair of a built-in yoke 26c and a built-in yoke 26d that are respectively in contact with the surface. The three pairs of built-in yokes 26 include a pair of built-in yoke 26e and built-in yoke 26f that are in contact with the N-pole surface and the S-pole surface of the permanent magnet 20c, respectively.

In the configuration shown in FIG. 5, since the magnetic poles are changed from two to three as compared with the configuration including one permanent magnet 20 and a pair of built-in yokes 26, one rotation of the permanent magnet 20 and the built-in yoke 26. It is possible to enlarge the region excited and demagnetized around 1.5 times.
For this reason, it becomes possible to reduce the rotational speed of the rotating shaft 32, to improve the quietness of the magnetic heat pump device 1, and to reduce COP (coefficient of performance).

(2) In the first embodiment, the permanent magnet 20 is formed in a square shape when viewed from the axial direction of the rotary shaft 32, but the present invention is not limited to this.
That is, for example, as shown in FIG. 6, when the permanent magnet 20 is viewed from the axial direction of the rotary shaft 32, two sides that form a square part are formed with straight sides that form a semicircular part. It may be an attached shape.
In this case, the magnetic flux density can be improved as compared with the case where the permanent magnet 20 is formed in a square shape when viewed from the axial direction of the rotating shaft 32.

(3) In 1st embodiment, although the permanent magnet 20 was formed with one magnet, it is not limited to this.
That is, for example, the permanent magnet 20 may be formed by combining a plurality of magnets. Further, the permanent magnet 20 may be formed by arranging a plurality of magnets in a Halbach array along the axial direction of the rotary shaft 32.

DESCRIPTION OF SYMBOLS 1 ... Magnetic heat pump apparatus, 2 ... Main-body part, 4 ... Communication hole plate, 6 ... Rotating disk, 8 ... End surface plate, 10 ... Circulation pump, 12 ... Heat radiation side heat exchanger, 14 ... Heat absorption side heat exchanger, 16 ... , 20 ... Permanent magnet, 22 ... Material container, 24 ... Inter-material yoke, 26 ... Built-in yoke, 28 ... Spacer, 30 ... Body container, 32 ... Rotating shaft, 34 ... Magnetic material, 36a ... Projecting part, 38 ... Rotating block 36b ... Projection part, 40a ... Outer peripheral side communication hole, 40b ... Inner peripheral side communication hole, 50 ... Plate, 60a ... Outer peripheral side notch, 60b ... Inner peripheral side notch, 80a ... Outer peripheral side pipe, 80b ... Inner peripheral side Side piping, CS ... center axis, MF ... flow of magnetic flux

Claims

A permanent magnet that is rotatable about the central axis of the rotation axis and in which the magnetization direction of the N pole and the S pole is parallel to a direction orthogonal to the axial direction of the central axis;
A material container disposed so as to surround the outer periphery of the permanent magnet and containing a magnetic material therein;
And at least a pair of built-in yokes that are in contact with surfaces of different polarity of the permanent magnets and are spaced apart from each other,
The material container is made of resin,
The built-in yoke is a ferromagnetic body and has a portion closer to the material container than the permanent magnet.
The permanent magnet has a set of the north pole and the south pole,
The built-in yokes are a pair of built-in yokes that are in contact with the N-pole surface and the S-pole surface, respectively, and are spaced apart from each other.
The material container is a plurality of material containers arranged at intervals along the circumferential direction of the rotating shaft,
A plurality of inter-material yokes disposed between the adjacent material containers;
The magnetic heat pump device according to claim 1, wherein the inter-material yoke is a ferromagnetic material.
3. The magnetic heat pump device according to claim 2, wherein the number of the material container and the inter-material yoke is an odd number.
A main body container for housing the permanent magnet and the material container;
The said main body container is resin, The magnetic heat pump apparatus described in any one of Claims 1-3 characterized by the above-mentioned.
A spacer disposed between the pair of built-in yokes;
The magnetic heat pump device according to any one of claims 1 to 4, wherein the spacer is made of a resin.
The magnetic heat pump device according to any one of claims 1 to 5, wherein the permanent magnet is formed in a square shape when viewed from an axial direction of the rotating shaft.
The magnetic heat pump device according to any one of claims 1 to 6, wherein the central axis and the center of gravity of the permanent magnet overlap each other when viewed from the axial direction of the rotating shaft. .
The magnetic heat pump device according to any one of claims 1 to 7, wherein the material container is formed in a square shape when viewed from an axial direction of the rotating shaft.