WO2019150819A1

WO2019150819A1 - Magnetic heat pump device

Info

Publication number: WO2019150819A1
Application number: PCT/JP2018/046914
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: JP2019132553A

Abstract

[Problem] To provide a magnetic heat pump device with which it is possible to improve magnetic flux density obtained per permanent-magnet mass. [Solution] A magnetic heat pump device 1 comprises: a built-in yoke 26 of a ferromagnetic body which is rotatable about a center axis CS of a rotary shaft 32 and which has a plurality of U-shaped storage sections 56 that open to the outer peripheral side of the rotary shaft 32 when seen from the axial direction of the center axis CS; a plurality of permanent magnets 20 which are stored in the respective storage sections 56 and contact the built-in yoke 26, the magnetization direction of the N pole and S pole of the permanent magnets being parallel to a direction orthogonal to the axial direction of the center axis CS; and a material container 22 made of resin which surrounds the outer periphery of the built-in yoke 26 and stores a magnetic material 34. When seen from the axial direction of the center axis CS, different-polarity surfaces of the permanent magnets 20 respectively contact the pairs of inner wall surfaces forming the storage sections 56, and the storage sections 56 have protruding portions 36 which are closer to the material container 22 than the permanent magnets 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-described problems, one aspect of the present invention is a magnetic heat pump device including a built-in yoke that is a ferromagnetic material, a plurality of permanent magnets, and a material container that is made of resin. The built-in yoke is a ferromagnetic body, is rotatable around the central axis of the rotating shaft, and has a plurality of accommodating portions formed in a U-shape that opens to the outer peripheral side of the rotating shaft when viewed from the axial direction of the central shaft. Have Each permanent magnet is housed in a plurality of housing portions and is in contact with the built-in yoke, and the magnetization direction of the N pole and the S pole is parallel to the direction perpendicular to the axial direction of the central axis. The material container is disposed so as to surround the outer periphery of the built-in yoke, and contains a magnetic material therein. In addition, as viewed from the axial direction of the central axis, surfaces having different polarities of the permanent magnets are in contact with the pair of inner wall surfaces forming the housing portion. Furthermore, the accommodating portion has a protruding portion that is 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 the projecting portion of the contact portion with the north pole of the housing portion, the magnetic material housed in the material container, and the housing portion. The flow reaches the S pole of the permanent magnet through the protruding portions of the contact portion with the S pole in order.
As a result, a magnetic circuit can be formed by a permanent magnet, a magnetic material, and a built-in yoke, and the flow of magnetic flux can be concentrated to improve the magnetic flux density obtained per mass of the permanent magnet. It becomes possible to provide a magnetic heat pump device.

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 a single built-in yoke 26, a plurality of permanent magnets 20, a plurality of material containers 22, a plurality of spacers 28, and a single main body container 30. 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 piping 16 is 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.

(Built-in yoke)
The built-in yoke 26 is formed using a metal material such as SUS, and is a ferromagnetic material.
The built-in yoke 26 includes one rotating plate portion 50, a plurality of outer plate portions 52, and a plurality of divided plate portions 54.
The rotating plate part 50 is formed in a plate shape and is fixed to the rotating shaft 32. The rotating shaft 32 is rotated by a motor (not shown). In addition, in FIG. 1, illustration of the rotating shaft 32 is abbreviate | omitted for description.
Specifically, when viewed from the axial direction of the rotating shaft 32, the center axis CS of the rotating shaft 32 passes through the center of gravity of the rotating plate portion 50.

The outer plate portion 52 is formed in a plate shape, and one of both end portions viewed from the axial direction of the rotating shaft 32 is one of the long sides of the rotating plate portion 50 viewed from the axial direction of the rotating shaft 32. , Continuous with one end. The other end of the outer plate 52 extends in the direction toward the material container 22.
In the first embodiment, a case where the built-in yoke 26 includes four outer plate portions 52 will be described as an example.
Of the four outer plate portions 52, two

outer plate portions

52a and 52b are each one of the long sides of the rotating plate portion 50 as viewed from the axial direction of the rotating shaft 32 (the upper length in FIG. 2). It is continuous with the end on the different side. Further, the remaining two

outer plate portions

52c and 52d among the four outer plate portions 52 are the other of the long sides of the rotating plate portion 50 when viewed from the axial direction of the rotating shaft 32 (in FIG. 2, It is continuous with the end on the different side of the lower long side.

The divided plate portion 54 is formed in a plate shape, and one of both end portions viewed from the axial direction of the rotating shaft 32 is the long side of the rotating plate portion 50 viewed from the axial direction of the rotating shaft 32. Is continuous with the center. Accordingly, the divided plate portion 54 is disposed at an intermediate position between the two outer plate portions 52 that are continuous with the long side of the rotary plate portion 50 when viewed from the axial direction of the rotary shaft 32.
The other of the two end portions of the dividing plate portion 54 extends in the direction toward the material container 22.
Further, the distance between the other end of the divided plate portion 54 and the material container 22 is equal to the distance between the other end of the outer plate 52 and the material container 22.

In the first embodiment, a case where the built-in yoke 26 includes two divided plate portions 54 will be described as an example.
One of the two divided plate portions 54 is arranged between the outer plate portion 52a and the outer plate portion 52b. The other divided plate portion 54b of the two divided plate portions 54 is disposed between the outer plate portion 52c and the outer plate portion 52d.
Further, when viewed from the axial direction of the rotating shaft 32, the region surrounded by the rotating plate portion 50, one outer plate portion 52, and one divided plate portion 54 is rotated when viewed from the axial direction of the central axis CS. A U-shaped accommodating portion 56 that opens to the outer peripheral side of the shaft 32 is formed.

In the first embodiment, as an example, a case where the built-in yoke 26 has four accommodating portions 56a to 56d will be described.
The accommodating portion 56a is formed by a region surrounded by the rotating plate portion 50, the outer plate portion 52a, and the divided plate portion 54a. The accommodating portion 56b is formed by a region surrounded by the rotating plate portion 50, the outer plate portion 52b, and the divided plate portion 54a. The accommodating portion 56c is formed by a region surrounded by the rotating plate portion 50, the outer plate portion 52c, and the divided plate portion 54b. The accommodating portion 56d is formed by a region surrounded by the rotating plate portion 50, the outer plate portion 52d, and the divided plate portion 54b.
Accordingly, of the four accommodating portions 56a to 56d, the two accommodating portions 56a and the accommodating portion 56b are arranged along a direction parallel to the direction orthogonal to the axial direction of the central axis CS when viewed from the axial direction of the central axis CS. Has been. Similarly, of the four accommodating portions 56a to 56d, the two accommodating portions 56c and the accommodating portion 56d are along a direction parallel to a direction orthogonal to the axial direction of the central axis CS when viewed from the axial direction of the central axis CS. It is arranged.

As described above, the built-in yoke 26 is rotatable around the central axis CS of the rotary shaft 32 and is formed in a plurality of U-shapes that open to the outer peripheral side of the rotary shaft 32 when viewed from the axial direction of the central shaft CS. The housing portion 56 is provided.
Further, the built-in yoke 26 has four accommodating portions 56a to 56d arranged at an equal distance from the central axis CS when viewed from the axial direction of the central axis CS.
Further, when viewed from the axial direction of the rotating shaft 32, the central axis CS and the center of gravity of the built-in yoke 26 overlap.

(permanent magnet)
Each of the plurality of permanent magnets 20 is accommodated in the accommodating portion 56 and is in contact with the built-in yoke 26. Note that the permanent magnet 20 accommodated in the accommodating portion 56 is attached to the built-in yoke 26 using an adhesive or the like. Moreover, the permanent magnet 20 accommodated in one accommodating part 56 is formed of one magnet.
In the first embodiment, since the built-in yoke 26 has four accommodating portions 56a to 56d, a case where the number of permanent magnets 20 is four will be described. In the following description, the permanent magnet 20 housed in the housing portion 56a may be referred to as “permanent magnet 20a”, and the permanent magnet 20 housed in the housing portion 56b may be referred to as “permanent magnet 20b”. Similarly, the permanent magnet 20 accommodated in the accommodating portion 56c may be indicated as “permanent magnet 20c”, and the permanent magnet 20 accommodated in the accommodating portion 56d may be indicated as “permanent magnet 20d”.

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. All the permanent magnets 20a to 20d have the same shape.
The permanent magnet 20 has a pair of N and S poles, and the magnetization direction of the N and S poles is in a direction perpendicular 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 surface of the permanent magnet 20a having the N pole is in contact with the surface of the divided plate portion 54a facing the outer plate portion 52a, and the surface of the permanent magnet 20a having the S pole is the surface of the outer plate portion 52a. It is in contact with the surface facing the dividing plate portion 54a. Further, the surface of the permanent magnet 20b whose polarity is the N pole is in contact with the surface facing the outer plate portion 52b of the divided plate portion 54a, and the surface of the permanent magnet 20b whose polarity is the S pole is the outer plate portion. 52b is in contact with the surface facing the divided plate portion 54a.

Furthermore, the surface of the permanent magnet 20c having the N pole is in contact with the surface of the divided plate portion 54b facing the outer plate portion 52c, and the surface of the permanent magnet 20c having the S pole is the outer plate portion. 52c is in contact with the surface facing the divided plate portion 54b. Further, the surface of the permanent magnet 20d having the N pole is in contact with the surface facing the outer plate portion 52d of the divided plate portion 54b, and the surface of the permanent magnet 20d having the S pole is the outer plate portion. It is in contact with the surface facing the split plate portion 54b of 52d.
Therefore, the two permanent magnets 20 arranged along the direction parallel to the direction orthogonal to the axial direction of the central axis CS and accommodated in the adjacent two accommodating portions 56 are the N pole surface and the S pole surface. Are facing each other.

Further, the distance between the permanent magnet 20 a and the material container 22 is longer than the distance between the divided plate portion 54 a and the material container 22 and the distance between the outer plate portion 52 a and the material container 22. Thereby, the accommodating part 56a has the two protrusion parts 36a which are parts closer to the material container 22 than the permanent magnet 20a by the division | segmentation board part 54a and the outer-plate part 52a.
Similarly, the distance between the permanent magnet 20 b and the material container 22 is longer than the distance between the divided plate portion 54 a and the material container 22 and the distance between the outer plate portion 52 b and the material container 22. Thereby, the accommodating part 56b has the two protrusion parts 36b which are parts closer to the material container 22 than the permanent magnet 20b by the division | segmentation board part 54a and the outer-plate part 52b.

Further, the distance between the permanent magnet 20 c and the material container 22 is longer than the distance between the divided plate portion 54 b and the material container 22 and the distance between the outer plate portion 52 c and the material container 22. Thereby, the accommodating part 56c has the two protrusion parts 36c which are parts closer to the material container 22 than the permanent magnet 20c by the division | segmentation board part 54b and the outer-plate part 52c.
Similarly, the distance between the permanent magnet 20 d and the material container 22 is longer than the distance between the divided plate portion 54 b and the material container 22 and the distance between the outer plate portion 52 d and the material container 22. Thereby, the accommodating part 56d has the two protrusion parts 36d which are parts closer to the material container 22 than the permanent magnet 20d by the division | segmentation board part 54b and the outer-plate part 52d.

As described above, the distance between the other end of the divided plate portion 54 and the material container 22 is equal to the distance between the other end of the outer plate 52 and the material container 22. For this reason, the distances between all the protruding portions 36 and the material containers 22 are the same as seen from the axial direction of the central axis CS.
The distance (gap) between each protruding portion 36 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, the permanent magnet 20 is set according to a value that can avoid contact between each protruding portion 36 and the material container 22 caused by swinging of the rotation shaft 32 when the permanent magnet 20 is rotated. .

(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.
The plurality of material containers 22 are arranged along the circumferential direction of the rotating shaft 32 so as to surround the outer periphery of the built-in yoke 26. Adjacent material containers 22 are in contact with each other.
In addition, in the material container 22, the in-container piping 16 shown in FIG. 1 is disposed so as to pass through the magnetic material 34. In FIG. Illustration of the piping 16 is omitted.

(Spacer)
The spacer 28 is made of resin (for example, made of ABS resin).
Further, each spacer 28 is disposed at a position closer to the material container 22 than the permanent magnet 20 in the accommodating portion 56, and is in contact with the permanent magnet 20. Each spacer 28 is attached to the built-in yoke 26 using an adhesive or the like.
The spacer 28a disposed in the accommodating portion 56a is disposed between the two protruding portions 36a. The spacer 28 a is formed in a shape such that the distance from the material container 22 does not become shorter than the distance between the protruding portion 36 a and the material container 22. The spacer 28b disposed in the accommodating portion 56b is disposed between the two protruding portions 36b. The spacer 28 b is formed in a shape such that the distance from the material container 22 does not become shorter than the distance from the protruding portion 36 b to the material container 22. The spacer 28c disposed in the accommodating portion 56c is disposed between the two protruding portions 36c. The spacer 28 c is formed in a shape such that the distance from the material container 22 does not become shorter than the distance between the protruding portion 36 c and the material container 22. The spacer 28d disposed in the accommodating portion 56d is disposed between the two protruding portions 36d. The spacer 28d is formed in a shape such that the distance from the material container 22 does not become shorter than the distance between the protruding portion 36d and the material container 22.

(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 built-in yoke 26, a permanent magnet 20, a material container 22, 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 and the material container 22b when the position of the permanent magnet 20 and the built-in yoke 26 is 0 °. Increases. Thereby, the magnetic material 34 accommodated in the material container 22a and the material container 22b is excited, and the temperature rises. The material container 22a is the material container 22 closest to the protruding portion 36a and the protruding portion 36b. The material container 22b is the material container 22 closest to the protruding portion 36c and the protruding portion 36d.

On the other hand, since the magnitude of the magnetic field applied to the plurality of material containers 22c arranged at a position different from the phase of the permanent magnet 20 and the built-in yoke 26 at 0 ° is reduced, it is accommodated in the material container 22c. 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 22c 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 22c 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 passed through the inner peripheral side pipe 80b, the inner peripheral side cutout 60b, and the inner peripheral side communication hole 40b in this order, and the material container 22a and the material container 22b. The in-container piping 16 arranged inside 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 22c containing the magnetic material 34 that has been demagnetized and the temperature is lowered. Further, the medium that has cooled the object to be cooled is absorbed in the material container 22a and the material container 22b by absorbing heat from the material container 22a and the material container 22b that contain the magnetic material 34 that has been excited to increase the temperature. The magnetic material 34 is cooled and moved 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, in the four accommodating portions 56a to 56d of the built-in yoke 26 that is a ferromagnetic material, the magnetization directions of the N pole and the S pole are orthogonal to the axial direction of the central axis CS, respectively. 4 permanent magnets 20a to 20d are accommodated. In addition to this, when viewed from the axial direction of the central axis CS, the pair of inner wall surfaces forming the accommodating portion 56 are in contact with surfaces having different polarities of the permanent magnet 20, and the accommodating portion 56 is made of a material more than the permanent magnet 20. A protruding portion 36 that is a portion close to the container 22 is provided.
For this reason, when the magnetic material 34 accommodated in the material container 22 closest to the protruding portion 36 is excited, the magnetic flux flow MF does not pass through the main body container 30 as shown in FIG.

That is, one of the magnetic flux flows MF starts from the N pole of the permanent magnet 20a in order from the divided plate portion 54a of the built-in yoke 26, the magnetic material 34 accommodated in the material container 22a, and the outer plate portion 52a of the built-in yoke 26. Via, the flow reaches the south pole of the permanent magnet 20a. Similarly, one of the magnetic flux flows MF passes from the north pole of the permanent magnet 20b to the divided plate portion 54a of the built-in yoke 26, the magnetic material 34 accommodated in the material container 22a, and the outer plate portion 52b of the built-in yoke 26. The flow reaches the south pole of the permanent magnet 20b through the order.
Further, one of the magnetic flux flows MF starts from the N pole of the permanent magnet 20c, in order from the divided plate portion 54b of the built-in yoke 26, the magnetic material 34 accommodated in the material container 22b, and the outer plate portion 52c of the built-in yoke 26. Via, the flow reaches the south pole of the permanent magnet 20c. Similarly, one of the magnetic flux flows MF passes from the north pole of the permanent magnet 20d to the divided plate portion 54b of the built-in yoke 26, the magnetic material 34 accommodated in the material container 22b, and the outer plate portion 52d of the built-in yoke 26. The flow reaches the south pole of the permanent magnet 20d through the order.

Thereby, a magnetic circuit through which magnetic flux flows can be formed by the permanent magnet 20, the built-in yoke 26, and the magnetic material 34.
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) A plurality of permanent magnets 20 in which the magnetization directions of the N pole and the S pole are parallel to the direction perpendicular to the axial direction of the central axis CS, respectively, in the plurality of receiving portions 56 included in the built-in yoke 26 that is a ferromagnetic body. Is housed. In addition to this, when viewed from the axial direction of the central axis CS, the pair of inner wall surfaces forming the accommodating portion 56 are in contact with surfaces having different polarities of the permanent magnet 20, and the accommodating portion 56 is made of a material more than the permanent magnet 20. A protruding portion 36 that is a portion close to the container 22 is provided.
Therefore, a magnetic circuit through which magnetic flux flows can be formed by the permanent magnet 20, the built-in yoke 26, and the magnetic material 34.
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) At least two of the plurality of accommodating portions 56 are arranged along a direction parallel to a direction orthogonal to the axial direction of the central axis CS when viewed from the axial direction of the central axis CS. In addition, the two permanent magnets 20 arranged along the direction parallel to the direction orthogonal to the axial direction of the central axis CS and accommodated in the adjacent two accommodating portions 56 are composed of an N-pole surface and an S-pole. Faces each other.
As a result, the magnetic flux flow MF that flows from the N pole of the permanent magnet 20 to the S pole of the permanent magnet 20 via the built-in yoke 26 and the magnetic material 34 is accommodated in the two adjacent accommodating portions 56. The two permanent magnets 20 can be efficiently generated.
In addition, the number of the permanent magnets 20 in which the N-pole surface and the S-pole surface are opposed to each other, and the housing portion 56 that houses the permanent magnets 20 in which the N-pole surface and the S-pole surface are opposed to each other. It is possible to adjust the attraction force and the attraction force of the magnetic material 34 by adjusting the number of.

(3) The built-in yoke 26 has four accommodating portions 56a to 56d arranged at an equal distance from the central axis CS when viewed from the axial direction of the central axis CS.
As a result, since the four permanent magnets 20a to 20d are arranged at equal distances starting from the central axis CS, the flow of magnetic flux MF can be made uniform, and from the four permanent magnets 20a to 20d, It becomes possible to obtain the magnetic flux density evenly.

(4) The distances between all the protruding portions 36 and the material containers 22 are the same as viewed from the axial direction of the central axis CS.
Therefore, for all the permanent magnets 20 (permanent magnets 20a to 20d), the magnetic flux that flows from the north pole of the permanent magnet 20 to the south pole of the permanent magnet 20 via the built-in yoke 26 and the magnetic material 34. The flow MF can be made uniform.
As a result, the magnetic flux density can be obtained uniformly from all the permanent magnets 20.

(5) 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.

(6) The spacer 28 made of resin is disposed at a position closer to the material container 22 than the permanent magnet 20 in the housing portion 56.
As a result, it is possible to normalize the flow of magnetic flux by preventing the protruding portions 36 of the built-in yoke 26 from contacting each other.
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.

(7) All the permanent magnets 20a to 20d have the same shape.
As a result, the permanent magnet 20 can be easily manufactured, and the cost can be reduced. (8) When viewed from the axial direction of the rotary shaft 32, the central axis CS of the rotary shaft 32 and the center of gravity of the built-in yoke 26 overlap.
As a result, compared with a configuration in which the center axis CS of the rotation shaft 32 and the center of gravity of the built-in yoke 26 are shifted, it is possible to reduce the swing generated when the permanent magnet 20 and the built-in yoke 26 rotate. The capability of the magnetic heat pump device 1 can be improved.

(Modification of the first embodiment)
(1) In the first embodiment, the configuration of the built-in yoke 26 is configured to include the four accommodating portions 56, but is not limited thereto.
That is, for example, as shown in FIG. 4, the configuration of the built-in yoke 26 may be a configuration having two accommodating portions 56. Further, for example, as shown in FIG. 5, the configuration of the built-in yoke 26 may be a configuration having six accommodating portions 56.

(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 viewed from the axial direction of the rotary shaft 32, the shape of the permanent magnet 20 is an arc-shaped side corresponding to the shape of the material container 22 at the side close to the material container 22. It is good also as a 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 accommodated in the one accommodating part 56 was formed with one magnet, it is not limited to this.
That is, for example, a plurality of magnets may be combined to form the permanent magnet 20 that is accommodated in one accommodation portion 56. 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, 26 ... Built-in yoke, 28 ... Spacer, 30 ... Main body container, 32 ... Rotating shaft, 34 ... Magnetic material, 36a ... Projection part, 36b ... Projection part, 40a ... Outer peripheral side communication Hole: 40b ... Inner peripheral side communication hole, 50 ... Rotating plate part, 52 ... Outer plate part, 54 ... Divided plate part, 56 ... Storage part, 60a ... Outer peripheral side notch, 60b ... Inner peripheral side notch, 80a ... Outer peripheral side pipe, 80b ... Inner peripheral side pipe, CS ... Center axis, MF ... Flow of magnetic flux

Claims

A built-in yoke that has a plurality of accommodating portions formed in a U-shape that is rotatable around the central axis of the rotary shaft and that opens to the outer peripheral side of the rotary shaft when viewed from the axial direction of the central shaft;
A plurality of permanent magnets housed in the plurality of housing portions and in contact with the built-in yoke, and in which the magnetization directions of the N and S poles are 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 built-in yoke, and containing a magnetic material therein,
When viewed from the axial direction of the central axis, a pair of inner wall surfaces forming the housing portion are in contact with surfaces having different polarities of the permanent magnet,
The material container is made of resin,
The built-in yoke is a ferromagnetic material,
The magnetic heat pump device according to claim 1, wherein the housing portion has a protruding portion that is closer to the material container than the permanent magnet.
At least two of the plurality of accommodating portions are arranged along a direction parallel to a direction orthogonal to the axial direction of the central axis when viewed from the axial direction of the central axis,
The two permanent magnets arranged along two directions parallel to the direction perpendicular to the axial direction of the central axis and housed in the two housing parts adjacent to each other are the surface of the N pole and the surface of the S pole. The magnetic heat pump device according to claim 1, wherein and are opposed to each other.
3. The magnetic heat pump device according to claim 2, wherein the built-in yoke has the four accommodating portions arranged at an equal distance from the central axis when viewed from the axial direction of the central axis.
The magnetic heat pump device according to any one of claims 1 to 3, wherein distances between all the protruding portions and the material container are equal when viewed in the axial direction of the central axis.
A main body container for housing the permanent magnet and the material container;
5. The magnetic heat pump device according to claim 1, wherein the main body container is made of a resin.
A spacer disposed at a position closer to the material container than the permanent magnet in the housing portion;
The magnetic heat pump device according to claim 1, wherein the spacer is made of resin.
The magnetic heat pump device according to any one of claims 1 to 6, wherein the plurality of permanent magnets have the same shape.
8. The magnetic heat pump device according to claim 1, wherein the central axis and the center of gravity of the built-in yoke overlap each other when viewed from the axial direction of the rotating shaft. .