JP2010196914A - Magnetic refrigerator using swash plate type piston drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic refrigerator in which a refrigerant is cooled by providing a magnetization working substance in pistons of a swash plate piston drive device and moving the pistons to insert/remove the magnetization working substance to/from the inside of a magnetic field. <P>SOLUTION: The magnetic refrigerator using swash plate type piston drive includes: the swash plate piston drive device for moving the pistons connected to a swash plate by rotating the swash plate; an exhaust heat part which includes magnetic field generation parts for generating the magnetic field, and in which the magnetization working substance provided in heads is inserted to/removed from the pistons/the magnetic field by the rotation of the swash plate, and the magnetization working substance generates heat when the magnetization working substance is within the magnetic field; and a cooling part for cooling the magnetization working substance by removal of the magnetization working substance from the magnetic field of the exhaust heat part by the movement of the pistons. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a magnetic refrigeration technology that cools a refrigerant by using a swash plate type piston drive.

The magnetic refrigeration uses a phenomenon (magnetoretic effect) in which a magnetic working material generates heat when a magnetic field is applied to a magnetic working material (for example, a magnetic material) and the temperature decreases when the magnetic field is removed.
According to Patent Document 1, a magnetic field generating means for generating a magnetic field, a magnetic working body having a magnetic working material whose temperature changes according to an increase or decrease of the magnetic field, and disposed in a magnetic field formed by the magnetic field generating means, A magnetic field increasing / decreasing means for increasing / decreasing the magnetic field applied to the magnetic working material, a circulator for circulating a cooling fluid to the magnetic working material, and a cooling fluid circulation device having an exhaust heat exchanger for transferring heat from the magnetic working material, There has been proposed a magnetic refrigeration apparatus including a cooler that cools an object to be cooled with a cooling fluid cooled by a magnetic working substance. With such a configuration, a refrigerator that can be used at room temperature, a refrigerator that does not use CFCs can be used at room temperature due to a compact configuration, and does not require a complicated configuration and is highly efficient and easy to handle.

  According to the magnetic temperature control device of Patent Document 2, a rotatable cylindrical magnetic shield, a magnetic field generator provided on the inner peripheral side of the magnetic shield, and an outer peripheral side of the magnetic shield are arranged. Has multiple magnetic working materials. The magnetic working material is divided into a plurality of groups, and the magnetic working material of each group is arranged along the axial direction of the magnetic shield. The magnetic shield includes a magnetic shield part and a magnetic passage part. The magnetic shielding unit and the magnetic passage unit are arranged on the temperature adjustment medium supply device side of each group when the magnetic working material changes from the state where the magnetic field is applied to the state where the application of the magnetic field is blocked. The working material is configured to be sequentially delayed in the direction of the magnetic working material disposed on the temperature-adjusted body side. With such a configuration, heat exchange between the plurality of magnetic working substances and the temperature control medium can be performed continuously and efficiently.

  However, in Patent Documents 1 and 2 described above, a magnetic refrigeration configuration in which a magnetizing working substance is provided in a piston of a swash plate type piston drive device and the medium is moved by moving the piston to cool the medium by inserting and removing the magnetizing working substance in the magnetic field. Is not described.

JP 2002-106999 A JP 2006-308197 A

  In view of the above circumstances, a magnetizing work substance is provided in the piston of the swash plate type piston drive device, and the piston is moved so that the magnetizing work substance is inserted into and removed from the magnetic field to cool the refrigerant. An object is to provide a refrigeration apparatus.

  A swash plate type piston drive device that moves a piston connected to the swash plate by rotating a swash plate, which is one aspect, a heat exhausting unit, and a cooling unit are provided. The exhaust heat unit includes a magnetic field generation unit that generates a magnetic field, and when the swash plate rotates, the magnetizing work substance provided on the head of the piston inserts and removes the magnetic field, and the magnetizing work substance is in the magnetic field. The magnetized working material generates heat when The cooling unit cools the magnetized working material by moving the piston and moving the magnetized working material out of the magnetic field of the exhaust heat unit.

With the above configuration, the piston can be miniaturized by including the magnetizing work substance.
In the magnetic field generation unit, a pair of yokes and permanent magnets are arranged with a cylinder bore into which the piston head is inserted.

  The piston includes a pipe through which a refrigerant passes, and the magnetizing work substance is disposed around the pipe.

  By providing a magnetizing work substance on the piston of the swash plate type piston drive device and moving the piston with the magnetizing work substance, the magnetizing work substance can be inserted into and removed from the magnetic field to cool the medium, and the magnetic refrigeration apparatus can be made compact. Can be

It is sectional drawing which shows the structure of the magnetic refrigeration apparatus of Example 1. FIG. It is sectional drawing of the heat generating part of the magnetic refrigeration apparatus of Example 1. FIG. It is sectional drawing of the cooling part of the magnetic refrigeration apparatus of Example 1. FIG. It is sectional drawing which shows the structure of the magnetic refrigeration apparatus of Example 2. It is sectional drawing which shows the structure of the magnetic refrigeration apparatus of Example 3. It is sectional drawing which shows the structure of the magnetic refrigeration apparatus of Example 4. It is a figure which shows the structure which has arrange | positioned the cooling part and waste heat part of a magnetic refrigeration apparatus oppositely. It is sectional drawing which shows the structure of the heat exhaust part of the magnetic refrigeration apparatus of Example 5. FIG. It is sectional drawing which shows the structure of the exhaust heat part of the magnetic refrigeration apparatus of Example 6. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing an outline of a magnetic refrigeration apparatus 1 using a swash plate type piston drive. In the first embodiment, as a swash plate type piston driving method, a method of rotating a swash plate 6 fixed to a rotating shaft 5 (shaft) by a motor 4 will be described. However, the driving method of the piston is not limited to the method shown in FIG. 1, and it is sufficient that the pistons 9a and 9b can be driven.

  The magnetic refrigeration apparatus 1 is formed by a cylinder block 2, a housing 3, and a motor 4, and a rotary shaft 5 (shaft), a swash plate 6, pistons 9a and 9b, and the like are provided therein.

  A plurality of cylindrical cylinder bores 17a and 17b extending in the axial direction are formed in the cylinder block 2 so as to surround the axial center in an annular shape. Pistons 9a and 9b are fitted in the cylinder bores 17a and 17b so as to be able to reciprocate. A housing 3 is attached to one end surface of the cylinder block 2 in the axial direction. A rear housing or the like is also attached to the other end surface of the cylinder block 2.

  Further, the cylinder block 2 is provided with an exhaust heat unit and a cooling unit. The exhaust heat unit includes a magnetic field generation unit that generates a magnetic field. When a swash plate described later rotates, the magnetizing work materials 10a and 10b provided on the pistons 9a and 9b insert and remove the magnetic field, and the magnetizing work materials 10a and 10b. Is a block in which the magnetized working materials 10a and 10b generate heat when they are in a magnetic field. The cooling unit is a block that absorbs heat from the magnetized working materials 10a and 10b when the pistons 9a and 9b move and the magnetized working materials 10a and 10b escape from the magnetic field of the exhaust heat unit.

  The magnetic field generating unit includes a yoke 11a provided on the outer peripheral side of the pistons 9a and 9b and a permanent magnet 12a provided on the rotating shaft 5 side of the piston 9a with the piston 9a interposed therebetween. The permanent magnet 12b is disposed with the piston 9b interposed therebetween. A magnetic field is generated between the yoke 11a and the permanent magnet 12a and between the yoke 11b and the permanent magnet 12b. The yokes 11a and 11b are made of metal such as iron. As the permanent magnets 12a and 12b, it is preferable to use permanent magnets capable of generating a strong magnetic field. For example, rare earth magnets such as neodymium magnets and samarium-cobalt magnets are used.

  The rotating shaft 5 is pivotally supported at the center of the cylinder block 2 in the axial direction. One end of the rotating shaft 5 is connected to a driving source such as a motor 4. A swash plate 6 is attached to the rotary shaft 5 so as to be relatively movable and tiltable in the axial direction. A through hole passing through the center line is formed in the swash plate 6, and the rotating shaft 5 passes through the through hole. A shaft seal 8 is provided between the rotary shaft 5 and the housing 3.

  The swash plate 6 is rotated integrally with the rotary shaft 5 and can be tilted with axial movement. The base material of the swash plate 6 is made of ductile cast iron (FCD700, FCD600, FCD500, etc.), but may be carbon steel for mechanical structures (S45C, S55C, etc.), various chromium molybdenum steels (SCM), etc., or a copper alloy. Good. Solid lubricant layers that are sliding coatings are formed on both sides of the substrate. This solid lubricant layer is composed of a mixture of MoS2, which is a solid lubricant, graphite (Gr) and polytetrafluoroethylene (PTFE), a fine powder of Sn which is a low melting point material, and a polyamideimide (PAI) which is a binder resin. It consists of. The thickness of the solid lubricant layer is about 10 to 20 μm. The solid lubricant layer shown here is only an example, and other layers can be used as appropriate according to specifications.

  A sliding coating similar to the solid lubricant layer may be formed on the inner peripheral surfaces of the cylinder bores 17a and 17b and the head surface of the piston 9, or on the outer peripheral surface of the shoe 13 and the surface of the engaging portion. It may be formed.

  The pair of shoes 13 is often made of SUJ2 (high carbon chrome bearing steel), but may be, for example, a surface of an aluminum alloy plated with Ni. Specifically, Ni—P, Ni—B, Ni—P—B, Ni—P—B—W, and the like are formed on a base material made of an aluminum alloy such as an Al—Si alloy equivalent to A4032 containing silicon. A Ni-based plating film may be formed. This coating may be a single coating or a plurality of different or similar coatings.

  The pistons 9a and 9b are engaged with each other in a state of straddling the outer peripheral portion of the swash plate 6, and heads that are provided integrally with the engagement portions and are slidably fitted into the cylinder bores 17a and 17b, respectively. Consists of. A compression chamber is formed by the head and the cylinder bores 17a and 17b. The engaging portion is engaged with the outer peripheral portion of the swash plate 6 via the shoe 13. The pistons 9a and 9b reciprocate as the swash plate 6 rotates. Specifically, the rotational movement of the swash plate 6 is converted into the reciprocating linear movement of the pistons 9 a and 9 b via the shoe 13.

  The cylinder block 2 and the pistons 9a and 9b are made of an aluminum alloy, and the outer peripheral surfaces of the pistons 9a and 9b are coated with a fluororesin. The fluororesin coating avoids direct contact with the same kind of metal to improve seizure resistance and makes the fitting gap (clearance) between the cylinder bores 17a and 17b as small as possible.

  Further, the pistons 9a and 9b are provided with pipes 16a and 16b penetrating the head from a direction perpendicular to the center line of the rotary shaft 5, and the pipes 16a and 16b are magnetized working substances accommodated in the pistons 9a and 9b. It penetrates the accommodating part which accommodates 10a, 10b. Further, the pipes 16a and 16b are connected to the cooling pipe 14 and the exhaust heat pipe 15 leading to the outside. When the pipe 16 moves to the cooling section, the pipes 16a and 16b are connected to the cooling pipe 14 and the pipe 16 is connected to the exhaust heat section. Is moved to the exhaust heat pipe 15.

  The magnetized working materials 10a and 10b are magnetic materials that increase in temperature when the applied magnetic field increases and decrease in temperature when the applied magnetic field decreases. For example, a magnetic material formed of a gadolinium-based material or a lanthanum-iron-silicon compound is used.

  The cooling pipe 14 is a path for sending the refrigerant discharged from the exhaust heat exchanger (for example, a condenser) to the pipes 16a and 16b. Moreover, it is a path | route which discharge | releases the refrigerant | coolant absorbed by the magnetization work substance 10a, 10b demagnetized in the piping 16a, 16b to a cooling fluid circulation apparatus (for example, evaporator). For example, when the pipe 16a and the exhaust heat pipe 15 are connected, the magnetized work substance 10a is outside the magnetic field generator, and the outer periphery of the swash plate 6 below the piston 9a is the uppermost in the upward direction in FIG. The position (TOP position) has been reached.

  The exhaust heat pipe 15 is a path through which the refrigerant provided in the cylinder block 2 is sent to the pipes 16a and 16b. It is also a route for discharging the refrigerant to the exhaust heat exchanger or the like via the pipes 16a and 16b. For example, when the pipe 16b and the exhaust heat pipe 15 are connected, the magnetized work substance 10b is in the magnetic field generator, and the outer periphery of the swash plate 6 below the piston 9b is the lowest position in the downward direction in FIG. (BOTTOM position) has been reached.

The pipes 16a and 16b are connected to the cooling pipe 14 or the exhaust heat pipe 15 from the stroke direction when the inclination angle of the swash plate 6 with respect to the rotating shaft 5 is changed. 16b can pass through, and when not connected, it is sealed and cut off by the side walls of the outer periphery of the heads of the pistons 9a and 9b. Note that water, ethanol, or the like is preferably used as the refrigerant.
(Description of operation)
In the example of FIG. 1, the magnetic refrigeration apparatus using the swash plate type piston driving apparatus having two pistons has been described. However, FIG.

  2A, 2B, 2C, and 2D are cross-sectional views of the heat exhausting portion of the magnetic refrigeration apparatus. "X" shown in each drawing indicates that the pipes 16a to 16d (piston hole positions) and the exhaust heat pipe 15 (hole positions of the cylinder block 2) are sealed by the side walls of the pistons 9a and 9b on the outer periphery of the head, thereby blocking the refrigerant. It shows that.

  FIG. 2A is a cross-sectional view of the heat exhaust portion when the lowest position of the swash plate 6 is on the piston 9d side and the highest position is on the piston 9c side. The refrigerant discharged from the cooling fluid circulation device is sucked from the suction port 15b of the exhaust heat pipe 15 provided between the piston 9d and the piston 9b, and the exhaust heat pipe provided between the piston 9d and the piston 9a. It discharges from 15 discharge ports 15d. When the refrigerant passes through the pipe 16d, the pistons 9a, 9b, 9c block the exhaust heat pipe 15.

  FIG. 2B is a cross-sectional view of the exhaust heat section when the lowest position of the swash plate 6 is on the piston 9a side and the highest position is on the piston 9b side. The refrigerant discharged from the cooling fluid circulation device is sucked from the suction port 15a of the exhaust heat pipe 15 provided between the piston 9a and the piston 9c, and the exhaust heat pipe provided between the piston 9a and the piston 9d. It discharges from 15 discharge ports 15d. When the refrigerant passes through the pipe 16a, the pistons 9b, 9c, and 9d block the exhaust heat pipe 15.

  FIG. 2C is a cross-sectional view of the heat exhaust portion when the lowest position of the swash plate 6 is on the piston 9c side and the highest position is on the piston 9d side. The refrigerant discharged from the cooling fluid circulation device is sucked from the suction port 15a of the exhaust heat pipe 15 provided between the piston 9a and the piston 9c, and the exhaust heat pipe provided between the piston 9c and the piston 9b. It discharges from 15 discharge ports 15c. When the refrigerant passes through the pipe 16a, the pistons 9a, 9b, 9d block the exhaust heat pipe 15.

  FIG. 2D is a cross-sectional view of the exhaust heat section when the lowest position of the swash plate 6 is on the piston 9b side and the highest position is on the piston 9a side. The refrigerant discharged from the cooling fluid circulation device is sucked from the suction port 15b of the exhaust heat pipe 15 provided between the piston 9b and the piston 9d, and the exhaust heat pipe provided between the piston 9c and the piston 9b. It discharges from 15 discharge ports 15c. When the refrigerant passes through the pipe 16a, the pistons 9a, 9c, and 9d block the exhaust heat pipe 15.

  As shown in FIGS. 2A to 2D, suction and discharge are repeated, and the refrigerant passes through the magnetized work material in the pistons 9a, 9b, 9c and 9d, so that the refrigerant absorbs heat and generates heat. Cool the magnetized working material.

  A, B, C, and D in FIG. 3 are cross-sectional views of the cooling unit of the magnetic refrigeration apparatus. "X" shown in each drawing indicates that the pipes 16a to 16d (piston hole positions) and the exhaust heat pipe 15 (hole positions of the cylinder block 2) are sealed by the side walls of the pistons 9a and 9b on the outer periphery of the head, thereby blocking the refrigerant. It shows that.

  3A is a cross-sectional view of the cooling unit when the lowest position of the swash plate 6 is on the piston 9c side and the highest position is on the piston 9d side. The refrigerant discharged from the exhaust heat exchanger is sucked from the suction port 14b of the cooling pipe 14 provided between the piston 9d and the piston 9b, and the cooling pipe 14 provided between the piston 9d and the piston 9a. From the outlet 14d. When the refrigerant passes through the pipe 16d, the pistons 9a, 9b, 9c block the cooling pipe 14.

  FIG. 3B is a cross-sectional view of the cooling portion when the lowest position of the swash plate 6 is on the piston 9b side and the highest position is on the piston 9a side. The refrigerant discharged from the exhaust heat exchanger is sucked from the suction port 14a of the cooling pipe 14 provided between the piston 9a and the piston 9c, and the cooling pipe 14 provided between the piston 9a and the piston 9d. From the outlet 14d. When the refrigerant passes through the pipe 16a, the pistons 9b, 9c, 9d block the cooling pipe 14.

  FIG. 3C is a cross-sectional view of the cooling unit when the lowest position of the swash plate 6 is on the piston 9d side and the highest position is on the piston 9c side. The refrigerant discharged from the exhaust heat exchanger is sucked from the suction port 14a of the cooling pipe 14 provided between the piston 9a and the piston 9c, and the cooling pipe 14 provided between the piston 9c and the piston 9b. It discharges from the discharge port 14c. When the refrigerant passes through the pipe 16a, the pistons 9a, 9b, 9d block the cooling pipe 14.

  3D is a cross-sectional view of the cooling portion when the lowest position of the swash plate 6 is on the piston 9a side and the highest position is on the piston 9d side. The refrigerant discharged from the exhaust heat exchanger is sucked from the suction port 14b of the cooling pipe 14 provided between the piston 9b and the piston 9d, and the cooling pipe 14 provided between the piston 9c and the piston 9b. It discharges from the discharge port 14c. When the refrigerant passes through the pipe 16a, the pistons 9a, 9c, 9d block the cooling pipe 14.

  As shown in FIGS. 3A to 3D, suction and discharge are repeated, and the refrigerant passes through the demagnetized magnetized working substance in the pistons 9a, 9b, 9c, and 9d, so that the refrigerant absorbs heat, and the temperature of the refrigerant Decreases.

As described above, the magnetic refrigeration apparatus can be miniaturized by providing the swash plate type piston drive device with the cooling section and the exhaust heat section.
(Example 2)
FIG. 4 shows the magnetic refrigeration apparatus 1 shown in the first embodiment provided with a pump 41.

  In the example shown in FIG. 4, the discharge port 1 of the cooling pipe 14 of the cooling unit of the magnetic refrigeration apparatus 1 is connected to the suction port of the evaporator 43. Further, the suction pipe 44 of the pump 41 is connected to the discharge port of the evaporator 43, and the discharge pipe 45 of the pump 41 is connected to the exhaust heat pipe 15 of the exhaust heat section of the magnetic refrigeration apparatus 1. The discharge port of the condenser 42 is connected to the suction port 1 of the cooling pipe 14 of the cooling unit, and the suction port of the capacitor 42 is connected to the discharge port 2 of the exhaust heat pipe 15 of the heat discharging unit.

  The pump 41 sucks the refrigerant discharged from the evaporator 43 into the compression chamber of the cylinder bore 17a or the cylinder bore 17b when the piston 9a or the piston 9b moves to the motor 4 side (intake stroke moving from the top dead center to the bottom dead center). To do. When the piston 9a or the piston 9b moves to the pump 41 side (a compression stroke that moves from the bottom dead center to the top dead center), the refrigerant is discharged from the compression chamber of the cylinder bore 17a or the cylinder bore 17b.

The pump 41 includes switching valves 46a and 46b and switching valves 47a and 47b. The switching valve 46 is opened when the refrigerant is sucked, and the switching valve 47 is closed when the refrigerant is discharged. The switching valves 46a and 46b and the switching valves 47a and 47b are controlled to be opened and closed by an electric control unit or a mechanical control unit, although not shown.
(Explanation of pump operation)
The operation of the pump 41 in FIG. 4 will be described. When the refrigerant discharged from the evaporator 43 is taken into the pump 41, as shown in FIG. 4, the piston 9b moves to the motor 4 side and the switching valve 46b is opened to suck the refrigerant into the compression chamber of the cylinder bore 17b. On the contrary, when the refrigerant is discharged from the pump 41 to the condenser 42, the piston 9a moves to the pump 41 side as shown in FIG. 4, and the switching valve 47a is opened to discharge the refrigerant in the compression chamber of the cylinder bore 17a. In this way, the pump 41 circulates the refrigerant by repeating suction and discharge.

With the above configuration, the pump can be miniaturized by using the magnetic refrigeration device by providing the swash plate type piston drive device with the cooling unit and the exhaust heat unit.
(Example 3)
FIG. 5 shows a second cooling unit and a second exhaust heat unit that operate in the same manner as the cooling unit and the exhaust heat unit of the first embodiment with a swash plate 6 interposed therebetween.

  The pistons 51a and 51b in FIG. 5 are provided with a second head across the swash plate 6 on the opposite side of the heads of the pistons 9a and 9b shown in the first embodiment, and the second head has a cylinder bore 58a, 58b.

  The magnetic field generating part of the second heat exhausting part is provided with a yoke 52a provided on the outer peripheral side of the piston 51a and a permanent magnet 53a provided on the rotating shaft 5 side of the piston 51a with the piston 51a interposed therebetween. Similarly, a yoke 52b and a permanent magnet 53b are disposed with a piston 51b interposed therebetween.

The magnetized working materials 54a and 54b are the same as the magnetized working materials 10a and 10b, and are accommodated in the pistons 51a and 51b.
The cooling pipe 56 is a path for sending the refrigerant discharged from the exhaust heat exchanger (for example, a condenser) to the pipes 57a and 57b. In addition, the refrigerant is a path through which the refrigerant absorbed by the magnetized working materials 54a and 54b demagnetized in the pipes 57a and 57b is discharged to a cooling fluid circulation device (for example, an evaporator). For example, when the pipe 57b and the cooling pipe 56 are connected, the magnetized work substance 54b is outside the magnetic field generating portion, and the outer periphery of the swash plate 6 on the piston 51b is the lowest in the downward direction in FIG. The position has been reached.

  The exhaust heat pipe 55 is a path through which the refrigerant provided in the cylinder block 2 is sent to the pipes 57a and 57b. It is also a route for discharging the refrigerant to the exhaust heat exchanger or the like via the pipes 57a and 57b. For example, when the pipe 57a and the exhaust heat pipe 55 are connected, the magnetized work substance 54a is in the magnetic field generator, and the outer periphery of the swash plate 6 on the piston 51a reaches the uppermost position in the upward direction in FIG. is doing.

  The pipes 57a and 57b are connected to the cooling pipe 56 or the exhaust heat pipe 55 from the stroke direction when the inclination angle of the swash plate 6 with respect to the rotation shaft 5 is changed. 57b can pass through, and when not connected, it is sealed and cut off by the side walls of the outer periphery of the heads of the pistons 51a and 51b.

With the above configuration, the refrigeration capacity can be improved by increasing the number of cylinders.
Example 4
FIG. 6 shows the magnetic refrigeration apparatus shown in the third embodiment in which a second pump 61 having the same function as the pump of the second embodiment is provided with the swash plate 6 interposed therebetween.

  In the example shown in FIG. 6, the discharge port of the cooling pipe 56 of the second cooling unit of the magnetic refrigeration apparatus is connected to the suction port of the evaporator 43. The suction pipe 65 of the second pump 61 is connected to the discharge port of the evaporator 43, and the discharge pipe 64 of the second pump 61 is connected to the exhaust heat pipe 55 of the exhaust heat section of the magnetic refrigeration apparatus. The discharge port of the condenser 42 is connected to the suction port 3 of the cooling pipe 56 of the cooling unit, and the suction port of the capacitor 42 is connected to the discharge port 4 of the exhaust heat pipe 55 of the exhaust heat unit.

  The second pump 61 is discharged from the evaporator 43 into the compression chamber of the cylinder bore 58a or the cylinder bore 58b when the piston 51a or the piston 51b moves toward the swash plate 6 (intake stroke moving from the top dead center to the bottom dead center). Inhale the refrigerant. When the piston 51a or the piston 51b moves toward the pump 41 (a compression stroke moving from the bottom dead center to the top dead center), the refrigerant is discharged from the compression chamber of the cylinder bore 58a or the cylinder bore 58b.

The second pump 61 includes switching valves 62a and 62b and switching valves 63a and 63b. The switching valve 62 is opened when the refrigerant is sucked, and the switching valve 63 is closed when the refrigerant is discharged. The switching valves 62a and 62b and the switching valves 63a and 63b are controlled to be opened and closed by an electric control unit or a mechanical control unit, although not shown.
(Explanation of pump operation)
The operation of the second pump 61 in FIG. 6 will be described. When the refrigerant discharged from the evaporator 43 is taken into the second pump 61, as shown in FIG. 6, the piston 51a is moved to the swash plate 6 side and the switching valve 63a is opened so that the refrigerant is put into the compression chamber of the cylinder bore 58a. Inhale. Conversely, when the refrigerant is discharged from the second pump 61 to the condenser 42, the piston 51b moves to the second pump 61 side as shown in FIG. 6, and the switching valve 62a is opened to allow the refrigerant in the compression chamber of the cylinder bore 58b to flow. Discharge. Thus, the second pump 61 circulates the refrigerant by repeating suction and discharge.

  With the above configuration, the pump can be miniaturized by using the magnetic refrigeration device by providing the swash plate type piston drive device with the cooling unit and the exhaust heat unit. Further, the refrigeration capacity can be improved by increasing the number of cylinders.

In addition, as shown to A of FIG. 7, an exhaust heat part and a cooling part may be arrange | positioned contrary to FIG. 3, and an exhaust heat part and a cooling part are shown in FIG. 6 like the pump shown to B of FIG. You may arrange | position reversely.
(Example 5)
The magnetic field generator of the fifth embodiment uses a permanent magnet 81 and a support portion 82 instead of the permanent magnets of the other embodiments. The magnetic field generation unit according to the fifth embodiment includes a permanent magnet 81 fixed to a support unit 82 that rotates on the outer periphery of the rotating shaft 5 according to the rotation of the rotating shaft 5, and includes the permanent magnet 81 and cylinder bores 17 a to 17 d ( Alternatively, the yokes 11a to 11d (or 52a to 52d) are arranged for each of the cylinder bores 17a to 17d (58a to 58d) across the 58a to 58d).

  In A, B, C, and D of FIG. 8, the case where the permanent magnet 81 is used instead of the permanent magnets 11a to 11d of the exhaust heat section of FIG. 2 will be described. "X" shown in each drawing indicates that the pipes 16a to 16d (piston hole positions) and the exhaust heat pipe 15 (hole positions of the cylinder block 2) are sealed by the side walls of the pistons 9a and 9b on the outer periphery of the head, thereby blocking the refrigerant. It shows that.

  8A is a cross-sectional view of the heat exhaust portion when the permanent magnet 81 is paired with the piston 9d, the lowermost position of the swash plate 6 is on the piston 9d side, and the uppermost position is on the piston 9c side. The refrigerant discharged from the cooling fluid circulation device is sucked from the suction port 15b of the exhaust heat pipe 15 provided between the piston 9d and the piston 9b, and the exhaust heat pipe provided between the piston 9d and the piston 9a. It discharges from 15 discharge ports 15d. When the refrigerant passes through the pipe 16d, the pistons 9a, 9b, 9c block the exhaust heat pipe 15.

  FIG. 8B is a cross-sectional view of the heat exhaust portion when the permanent magnet 81 is paired with the piston 9a, the lowest position of the swash plate 6 is on the piston 9a side, and the uppermost position is on the piston 9b side. The refrigerant discharged from the cooling fluid circulation device is sucked from the suction port 15a of the exhaust heat pipe 15 provided between the piston 9a and the piston 9c, and the exhaust heat pipe provided between the piston 9a and the piston 9d. It discharges from 15 discharge ports 15d. When the refrigerant passes through the pipe 16a, the pistons 9b, 9c, and 9d block the exhaust heat pipe 15.

  FIG. 8C is a cross-sectional view of the heat exhaust portion when the permanent magnet 81 is paired with the piston 9c, the lowermost position of the swash plate 6 is on the piston 9c side, and the uppermost position is on the piston 9d side. The refrigerant discharged from the cooling fluid circulation device is sucked from the suction port 15a of the exhaust heat pipe 15 provided between the piston 9a and the piston 9c, and the exhaust heat pipe provided between the piston 9c and the piston 9b. It discharges from 15 discharge ports 15c. When the refrigerant passes through the pipe 16a, the pistons 9a, 9b, 9d block the exhaust heat pipe 15.

  FIG. 8D is a cross-sectional view of the heat exhaust portion when the permanent magnet 81 is paired with the piston 9b, the lowest position of the swash plate 6 is on the piston 9b side, and the uppermost position is on the piston 9a side. The refrigerant discharged from the cooling fluid circulation device is sucked from the suction port 15b of the exhaust heat pipe 15 provided between the piston 9b and the piston 9d, and the exhaust heat pipe provided between the piston 9c and the piston 9b. It discharges from 15 discharge ports 15c. When the refrigerant passes through the pipe 16a, the pistons 9a, 9c, and 9d block the exhaust heat pipe 15.

  As shown in FIGS. 8A to 8D, suction and discharge are repeated, and the refrigerant passes through the magnetized work material in the pistons 9a, 9b, 9c and 9d, so that the refrigerant absorbs heat and generates heat. Cool the magnetized working material.

With the above configuration, the number of permanent magnets can be reduced, so that the cost can be reduced.
(Example 6)
FIG. 9 is a view showing an exhaust heat portion of the magnetic refrigeration apparatus for increasing the cooling capacity by increasing the quantity of pistons and increasing the amount of refrigerant flowing through the cooling passage during one rotation. FIG. 9 shows an example in which a magnetic field generation unit, a permanent magnet, a yoke, and the like are added to the exhaust heat unit shown in FIG.

The magnetic field generation unit of the sixth embodiment includes permanent magnets 12a to 12f, and yokes 11a to 11f are disposed for each of the pistons 9a to 9f with the pistons 9a to 9f interposed therebetween.
In FIG. 9, “x” indicates piping 16a, 16b, 16c, 16d, 16f (piston hole position) and exhaust heat piping 15 (hole position of the cylinder block 2) of the pistons 9a, 9b, 9c, 9d, 9f. It shows that the refrigerant is blocked by the side wall of the outer periphery of the head. As in the above embodiment, when the swash plate 6 rotates, the pistons 9a, 9b, 9c, 9d, and 9f move to repeat the suction and discharge of the refrigerant at the respective suction ports and discharge ports.

With the above configuration, the cooling capacity can be improved by increasing the amount of refrigerant flowing through the cooling passage during one rotation.
The present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the gist of the present invention.

1 Magnetic refrigeration equipment,
2 cylinder block,
3 Housing,
4 motor,
5 rotation axis,
6 Swash plate,
8 Shaft seal,
9, 9a, 9b, 9c, 9d, 9e, 9f Piston,
10a, 10b Magnetizing work substance,
11, 11a, 11b, 11c, 11d, 11e, 11f yoke,
12, 12a, 12b, 12c, 12d, 12e, 12f permanent magnet,
13 shoe,
14 Cooling piping,
14a, 14b inlet,
14c, 14d outlet,
15 Exhaust heat piping,
15a, 15b inlet,
15c, 15d outlet,
16, 16a, 16b, 16c, 16d, 16e, 16f piping,
17a, 17b cylinder bore,
41 pump,
42 capacitors,
43 Evaporator,
44 Suction piping,
45 Discharge piping,
46, 46a, 46b switching valve,
47, 47a, 47b switching valve,
51, 51a, 51b piston,
52, 52a, 52b yoke,
53, 53a, 53b permanent magnet,
54a, 54b Magnetizing work substance,
55 Exhaust heat piping,
56 Cooling piping,
57a, 57b piping,
58a, 58b cylinder bore,
61 second pump,
62, 62a, 62b switching valve,
63, 63a, 63b switching valve,
65 suction piping,
64 Discharge piping,
81 permanent magnets,
82 Supporting part

Claims (8)

A swash plate type piston drive device for moving a piston connected to the swash plate by rotating the swash plate;
A magnetic field generating unit for generating a magnetic field, wherein the magnetizing work material provided on a head of the piston inserts and removes the magnetic field by rotating the swash plate, and the magnetization when the magnetizing work material is in the magnetic field; An exhaust heat section where the working substance generates heat;
A cooling unit that cools the magnetized working material by moving the piston and moving the magnetized working material out of the magnetic field of the exhaust heat unit;
A magnetic refrigeration apparatus using a swash plate type piston drive.   2. The magnetic refrigeration apparatus according to claim 1, wherein the magnetic field generator includes a pair of yokes and permanent magnets arranged with a cylinder bore into which a head of the piston is inserted.   The magnetic refrigeration apparatus according to claim 2, wherein a pipe through which a refrigerant passes is provided at a head of the piston, and the magnetization working substance is disposed around the pipe. A pump for sucking the refrigerant into the cylinder bore and discharging the refrigerant from the cylinder bore by moving the piston head in the cylinder bore;
The refrigerant discharged from the condenser passes through the cooling unit and is discharged to the evaporator, and the refrigerant is sucked into the pump through the evaporator.
4. The magnetic refrigeration apparatus according to claim 3, wherein the sucked refrigerant is discharged to the exhaust heat unit by the pump, and the refrigerant is discharged to an evaporator through the exhaust heat unit. The piston includes a head having the magnetized working material on both sides of the swash plate,
The magnetic refrigeration apparatus according to claim 3, wherein a second exhaust heat unit and a second cooling unit having functions similar to the exhaust heat unit and the cooling unit are provided with the swash plate interposed therebetween. A second pump having the same function as the pump is provided for the swash plate,
The refrigerant discharged from the condenser passes through the second cooling section and is discharged to the evaporator, and the refrigerant is sucked into the second pump through the evaporator,
4. The sucked refrigerant is discharged to the second heat exhaust unit by the second pump, and the refrigerant is discharged to the evaporator through the second heat exhaust unit. Magnetic refrigeration equipment. The permanent magnet of the magnetic field generator is
The magnetic refrigeration apparatus according to any one of claims 1 to 6, wherein the permanent magnet rotates on an outer periphery of a rotation shaft of the swash plate in accordance with rotation of the swash plate. The exhaust heat part is
The magnetic refrigeration apparatus according to claim 1, further comprising two or more pistons and the magnetic field generation unit corresponding to the pistons.

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