JP2017096528A - Heat exchanger and magnetic heat pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of improving heat exchange efficiency.SOLUTION: A first MCM heat exchanger 10 is a heat exchanger for a magnetic heat pump device, and includes a wire 12 being a magnetocaloric effect material exhibiting a magnetocaloric effect, and a container 13 having a storage space 135 storing the wire 12. The container 13 includes plural rows of grooves 134 formed on an inner peripheral surface 136 defining the storage space 135, and the plural rows of grooves 134 extend along a direction inclined to an extension direction of the storage space 135.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a heat exchanger used in a magnetic heat pump device using a magnetocaloric effect, and a magnetic heat pump device including the heat exchanger.

  As a heat exchanger used in a magnetic refrigeration apparatus using the magnetocaloric effect, a magnetic working substance is filled in a duct, and a spherical magnetic working substance is fixed to the inner wall of the duct (for example, Patent Document 1). In the heat exchanger described in Patent Document 1, dimples are formed on the inner wall of the duct, and a spherical magnetic working material is partially fitted into the dimples.

JP 2009-281683 A

  In the above heat exchanger, since half of the volume of the spherical magnetic working material is embedded in the inner wall of the duct, only half of the volume of the spherical magnetic working material is used for heat exchange, effectively increasing the heat exchange efficiency. It cannot be improved.

  The problem to be solved by the present invention is to provide a heat exchanger and a magnetic heat pump device that can improve heat exchange efficiency.

[1] A heat exchanger according to the present invention is a heat exchanger used in a magnetic heat pump device, and a container having a magnetocaloric effect material exhibiting a magnetocaloric effect and a housing space for housing the magnetocaloric effect material. The container includes a plurality of rows of grooves formed on an inner wall surface that defines the accommodation space, and the plurality of rows of grooves extend along a direction inclined with respect to the extending direction of the accommodation space. It is extended.

[2] In the above invention, the magnetocaloric effect material is a wire, an assembly composed of a plurality of the wires is accommodated in the accommodation space, and the plurality of wires extend the accommodation space. It may extend along the direction.

[3] A magnetic heat pump device according to the present invention includes at least one heat exchanger, a magnetic field changing unit that applies a magnetic field to the magnetocaloric effect material and changes the magnitude of the magnetic field, and the pipe through a pipe. First and second external heat exchangers respectively connected to the accommodation space of the heat exchanger, and the first or second external heat exchanger from the heat exchanger in conjunction with the operation of the magnetic field changing means Fluid supply means for supplying a fluid to the fluid.

  In this invention, the ratio of the fluid which passes along the inner wall face of a container among the fluid which passes through the storage space of a container can be reduced. Thereby, the heat exchange efficiency of a heat exchanger can be improved.

FIG. 1 is a diagram illustrating an overall configuration of a magnetic heat pump device according to an embodiment of the present invention, and is a diagram illustrating a state in which a piston is in a first position. FIG. 2 is a diagram illustrating the overall configuration of the magnetic heat pump device according to the embodiment of the present invention, and is a diagram illustrating a state where the piston is in the second position. FIG. 3 is an exploded perspective view showing the configuration of the MCM heat exchanger according to one embodiment of the present invention. FIG. 4 is a cross-sectional view along the extending direction of the MCM heat exchanger according to the embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a diagram showing an expanded container according to an embodiment of the present invention. FIG. 7 is a perspective view showing a container according to an embodiment of the present invention with a part broken away. FIG. 8 is a cross-sectional view showing an MCM heat exchanger according to a modification of the present invention. FIG. 9 is an expanded view of a container according to a modification of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG.1 and FIG.2 is a figure which shows the whole structure of the magnetic heat pump apparatus in this embodiment. 3-5 is a figure which shows the MCM heat exchanger in this embodiment, FIG.6 and FIG.7 is a figure which shows the container which concerns on this embodiment.

  The magnetic heat pump device 1 in the present embodiment is a heat pump device using a magnetocaloric effect, and as shown in FIGS. 1 and 2, first and second MCM heat exchangers 10 and 20, The piston 30, the permanent magnet 40, the low temperature side heat exchanger 50, the high temperature side heat exchanger 60, the pump 70, the pipes 81 to 84, and the switching valve 90 are provided.

  The “magnetic heat pump device 1” in the present embodiment corresponds to an example of the “magnetic heat pump device” in the present invention, and the “first and second MCM heat exchangers 10 and 20” in the present embodiment are “heat” in the present invention. The “piston 30” and the “permanent magnet 40” in the present embodiment correspond to an example of the “magnetic field changing means” in the present invention, and the “low temperature side heat exchanger 50” in the present embodiment. The “high temperature side heat exchanger 60” corresponds to an example of “first and second external heat exchangers” in the present invention, and the “pump 70” in the present embodiment is an example of “fluid supply means” in the present invention. It corresponds to.

  As shown in FIGS. 3 and 4, the first MCM heat exchanger 10 includes an assembly 11 composed of a plurality of wires 12, a container 13 having an accommodation space 135 for accommodating the assembly 11, and a container 13. A first adapter 16 and a second adapter 17 connected to each other are provided. “Wire 12” in the present embodiment corresponds to an example of “magnetocaloric effect material” and “wire” in the present invention, and “aggregate 11” in the present embodiment corresponds to an example of “aggregate” in the present invention. The “container 13” in the present embodiment corresponds to an example of the “container” in the present invention.

  Since the first MCM heat exchanger 10 and the second MCM heat exchanger 20 have the same configuration, only the configuration of the first MCM heat exchanger 10 will be described below. The configuration of the MCM heat exchanger 20 will be omitted. Therefore, in FIGS. 3-7, the 1st MCM heat exchanger 10 is shown, About the 2nd MCM heat exchanger 20, the code | symbol corresponding to a parenthesis is attached | subjected and illustration is abbreviate | omitted.

  The wire 12 is made of a magnetocaloric effect material (MCM) having a magnetocaloric effect. When a magnetic field is applied to the wire 12 composed of this MCM, the magnetic spins are reduced by aligning the electron spin, and the wire 12 generates heat and the temperature rises. On the other hand, when the magnetic field is removed from the wire 12, the electron spin becomes messy and the magnetic entropy increases, and the wire 12 absorbs heat and the temperature decreases.

  Although MCM which comprises this wire 12 will not be specifically limited if it is a magnetic body, For example, it is preferable that it is a magnetic body which exhibits the high magnetocaloric effect in a normal temperature range. Specific examples of such MCMs include gadolinium (Gd), gadolinium alloys, lanthanum-iron-silicon (La-Fe-Si) compounds, and the like.

  The wire 12 in the present embodiment is a wire having a circular cross-sectional shape. If the first flow path 111 (described later) can be formed between the wires 12 when the plurality of wires 12 are accommodated in the container 13, the wire 12 may have a cross-sectional shape other than a circle. Good.

  The assembly 11 is configured by arranging a plurality of the wires 12 in parallel with each other. The side surfaces of adjacent wire rods 12 are in contact with each other, and as a result, a first flow path 111 is formed between them. For ease of understanding, FIG. 3 and FIG. 5 show the assembly 11 composed of a smaller number of wire rods 12 than the actual number, but in practice, several to several hundreds. An assembly 11 is composed of the wire rods 12. Although it does not specifically limit as an outer diameter of such an aggregate | assembly 11, For example, it is preferable to set to 30 mm or less from a viewpoint of ensuring magnetic flux density.

  Although it does not specifically limit as a wire diameter of the wire 12, For example, it is preferable that it is 1-10 mm, and it is more preferable that it is 1-5 mm. At this time, the plurality of wire rods 12 constituting the aggregate 11 may have substantially the same wire diameter, or may have a mixture of different wire diameters.

  The assembly 11 of the wire 12 is accommodated in the accommodation space 135 of the container 13. The container 13 is comprised by the rectangular cylinder shape as shown in FIGS. A first opening 131 and a second opening 132 are respectively formed at one end and the other end of the container 13 in the axial direction, and one end of the accommodation space 135 is opened by the first opening 131, The other end of the space 135 is opened by the second opening 132. The wire 12 extends linearly, and the extending direction of the wire 12 coincides with the axial direction of the container 13. That is, the extending direction of the wire 12 coincides with the extending direction of the accommodation space 135 formed in the container 13. Further, the centers of the first and second openings 131 and 132 are located coaxially with the center of the assembly 11. That is, the extending direction of the accommodation space 135 formed in the container 13 and the axial direction of the assembly 11 are the same. Further, as described above, the first flow path 111 is formed between the wire members 12 constituting the assembly 11. On the other hand, a second flow path 112 is formed between the outermost wire 12 and the inner wall surface 136 of the assembly 11.

  As shown in FIGS. 5 to 7, a plurality of rows of grooves 134 are formed on the inner wall surface 136 of the container 13 that defines the accommodation space 135. The plurality of rows of grooves 134 are formed such that unevenness is repeated in the circumferential direction of the accommodation space 135. Examples of the cross-sectional shape when the groove 134 is cut in a cross-section orthogonal to the axial direction of the container 13 include a triangular shape as shown, a rectangular shape, an arc shape, or the like.

  Although it does not specifically limit as the depth of the groove | channel 134, Compared with the wire diameter of the wire 12, It is preferable that it is relatively small. For example, it is preferably 0.1 to 2 mm, and more preferably 0.1 to 1 mm. Further, the pitch of the grooves 134 is preferably relatively small as compared with the wire diameter of the wire 12. For example, it is preferably 0.1 to 2 mm, and more preferably 0.1 to 1 mm.

  Here, as shown in FIGS. 6 and 7, the groove 134 extends linearly in each plane constituting the inner wall surface 136, and the plurality of grooves 134 are substantially parallel to each other. It is extended. The extending direction of the groove 134 is inclined at a predetermined angle with respect to the axial direction of the container 13 (that is, the extending direction of the accommodation space 135 of the container 13). Although it does not specifically limit as this predetermined angle, For example, it is preferable that it is 15-45 degrees, and it is more preferable that it is 20-35 degrees.

  At the corner 137 of the inner wall surface 136, the end of the plurality of rows of grooves 134 formed in one of the mutually orthogonal planes, and the end of the plurality of rows of grooves 134 formed in the other of the mutually orthogonal planes The positions of match. That is, the plurality of rows of grooves 134 formed in one of the mutually orthogonal planes and the plurality of rows of grooves 134 formed in the other of the mutually orthogonal planes are continuously formed. In addition, it is not essential to continuously form a plurality of rows of grooves 134 formed on one of the mutually orthogonal planes and a plurality of rows of grooves 134 formed on the other of the mutually orthogonal planes. You may form intermittently.

  The “groove 134” in the present embodiment corresponds to an example of the “groove” in the present invention, and the “accommodating space 135” in the present embodiment corresponds to an example of the “accommodating space” in the present invention.

  As shown in FIG. 3, the first adapter 16 is connected to the first opening 131 of the container 13, and the second adapter 17 is connected to the second opening 132. As the first and second adapters 16 and 17, for example, heat shrinkable tubes, resin molded products, metal processed products, or the like can be used.

  The first adapter 16 has a first coupling port 161 smaller than the first opening 131 on the side opposite to the side connected to the first opening 131. The first connection port 161 communicates with the low temperature side heat exchanger 50 via the first low temperature side pipe 81. The second adapter 17 also has a second connection port 171 smaller than the second opening 132 on the side opposite to the side connected to the second opening 132. The second connection port 171 communicates with the high temperature side heat exchanger 60 via the first high temperature side pipe 83. The centers of the first and second connection ports 161 and 171 are located coaxially with the center of the assembly 11.

  Similarly, an assembly 21 made of a plurality of wires 22 is also stored in the storage space 235 of the container 23 of the second MCM heat exchanger 20. As with the first MCM heat exchanger 10, the third adapter 26 is connected to the third opening 231 of the container 23, and the fourth adapter 27 is connected to the fourth opening 232 of the container 23. Has been. The second MCM heat exchanger 20 communicates with the low temperature side heat exchanger 50 via a second low temperature side pipe 82 connected to the third adapter 26. On the other hand, the second MCM heat exchanger 20 communicates with the high temperature side heat exchanger 60 via the second high temperature side pipe 84 connected to the fourth adapter 27.

  In the present embodiment, the wire 22 of the second MCM heat exchanger 20 has the same configuration as the wire 12 of the first MCM heat exchanger 10. Further, the assembly 21 of the wires 22 of the second MCM heat exchanger 20 has the same configuration as the assembly 11 of the wires 12 of the first MCM heat exchanger 10. Further, the container 23 of the second MCM heat exchanger 20 has the same configuration as the container 13 of the first MCM heat exchanger 10.

  For example, as shown in FIG. 1 and FIG. 2, when the air conditioner using the magnetic heat pump device 1 according to the present embodiment is caused to function as cooling, heat is generated between the low temperature side heat exchanger 50 and indoor air. The room is cooled by exchanging, and heat is radiated to the outside by exchanging heat between the high temperature side heat exchanger 60 and the outside.

  On the other hand, when making the said air conditioning apparatus function as heating, while heat-exchanging between the high temperature side heat exchanger 60 and indoor air, a room is warmed, and the low temperature side heat exchanger 50 and outdoor Heat is absorbed from the outside by exchanging heat with air.

  As described above, a circulation path including the four heat exchangers 10, 20, 50, 60 is formed by the two low temperature side pipes 81, 82 and the two high temperature side pipes 83, 84. A liquid medium is pumped into the circulation path. Specific examples of the liquid medium include liquids such as water, antifreeze, ethanol solution, or a mixture thereof.

  The two MCM heat exchangers 10 and 20 are accommodated inside the piston 30. The piston 30 can reciprocate between the pair of permanent magnets 40 by an actuator 35. Specifically, the piston 30 can reciprocate between a “first position” as shown in FIG. 1 and a “second position” as shown in FIG. . In addition, as an example of the actuator 35, an air cylinder etc. can be illustrated, for example.

  Here, the “first position” refers to a piston in which the first MCM heat exchanger 10 is not interposed between the permanent magnets 40 and the second MCM heat exchanger 20 is interposed between the permanent magnets 40. 30 positions. On the other hand, the “second position” is a piston in which the first MCM heat exchanger 10 is interposed between the permanent magnets 40 and the second MCM heat exchanger 20 is not interposed between the permanent magnets 40. 30 positions.

  Note that the permanent magnet 40 may be reciprocated by the actuator 35 instead of the first and second MCM heat exchangers 10 and 20. Alternatively, an electromagnet having a coil may be used in place of the permanent magnet 40. In this case, a mechanism for moving the MCM heat exchangers 10 and 20 or the magnet becomes unnecessary. When using an electromagnet having a coil, the magnitude of the magnetic field applied to the wires 12 and 22 is changed instead of applying / removing the magnetic field to / from the wires 12 and 22 of the MCM heat exchangers 10 and 20. May be.

  The switching valve 90 is provided in the first high temperature side pipe 83 and the second high temperature side pipe 84. The switching valve 90 switches the liquid medium supply destination to the first MCM heat exchanger 10 or the second MCM heat exchanger 20 by the pump 70 in conjunction with the operation of the piston 30 described above, The connection destination of the high temperature side heat exchanger 60 can be switched to the second MCM heat exchanger 20 or the first MCM heat exchanger 10.

  Next, operation | movement of the magnetic heat pump apparatus 1 in this embodiment is demonstrated.

  First, when the piston 30 is moved to the “first position” shown in FIG. 1, the wire 12 of the first MCM heat exchanger 10 is demagnetized and the temperature decreases, while the second MCM heat exchanger 20. The wire 22 is magnetized and the temperature rises.

  At the same time, the switching valve 90 causes the pump 70 → the first high temperature side pipe 83 → the first MCM heat exchanger 10 → the first low temperature side pipe 81 → the low temperature side heat exchanger 50 → the second low temperature side pipe. A first path consisting of 82 → second MCM heat exchanger 20 → second high temperature side pipe 84 → high temperature side heat exchanger 60 → pump 70 is formed.

  For this reason, the liquid medium is cooled by the wire 12 of the first MCM heat exchanger 10 whose temperature has decreased due to demagnetization, the liquid medium is supplied to the low-temperature side heat exchanger 50, and the low-temperature side heat exchanger 50 is To be cooled.

  At this time, in the accommodation space 135 of the first MCM heat exchanger 10, the liquid medium occupying a large proportion of the whole passes through the first channel 111 on the center side, and the remaining part of the liquid medium Passes through the second flow path 112 on the outer peripheral side. The liquid medium passing through the first flow path 111 is cooled by the plurality of wires 12 by coming into contact with the plurality of wires 12 surrounding the first flow path 111. Further, the liquid medium passing through the second flow path 112 is cooled by the wire 12 by contacting the outermost wire 12 in the assembly 11.

  Here, one end of the plurality of rows of grooves 134 formed over the entire inner wall surface 136 is positioned in the first opening 131. Therefore, in the first opening 131, the cross-sectional area of the flow path of the liquid medium flowing into the second flow path 112 is reduced, so that a contracted flow is generated in the liquid medium flowing into the second flow path 112, and the pressure Loss occurs. Further, since the extending direction of the groove 134 is inclined with respect to the extending direction of the accommodation space 135, the direction of the flow of the liquid medium flowing into the second flow path 112 from the first opening 131 is changed. . Therefore, in the first opening 131, a pressure loss occurs in the liquid medium flowing into the second flow path 112. This makes it difficult for the liquid medium to flow through the second flow path 112. Accordingly, since the proportion of the liquid medium flowing along the inner wall surface 136 in the liquid medium flowing through the accommodation space 135 is reduced, the heat exchange efficiency of the liquid medium is improved.

  Further, the liquid medium flowing through the second flow path 112 flows in a direction inclined with respect to the extending direction of the accommodation space 135 along the plurality of rows of grooves 134. Thereby, compared with the case where the extending direction of the plurality of rows of grooves 134 and the extending direction of the accommodating space 135 coincide with each other, the flow path length of the liquid medium flowing through the second flow path 112 is increased, The contact length between the liquid medium flowing through the second flow path 112 and the wire 12 is increased. Therefore, the heat exchange efficiency of the liquid medium flowing through the second flow path 112 is improved.

  On the other hand, the liquid medium is heated by the wire 22 of the second MCM heat exchanger 20 that has been magnetized and the temperature has risen, and the liquid medium is supplied to the high temperature side heat exchanger 60, and the high temperature side heat exchanger 60. Is heated.

  At this time, in the accommodation space 235 of the second MCM heat exchanger 20, the liquid medium occupying a large proportion of the whole passes through the first flow path 211 on the central side, and the remaining part of the liquid medium And passes through the second channel 212 on the outer peripheral side. The liquid medium passing through the first flow path 211 is heated by the plurality of wires 22 by coming into contact with the plurality of wires 22 surrounding the first flow path 211. Further, the liquid medium passing through the second flow path 212 is heated by the wire 22 by contacting the outermost wire 22 in the assembly 21.

  Also in this case, one end of the plurality of rows of grooves 234 formed over the entire inner wall surface 236 is located in the third opening 231. Therefore, in the third opening 231, the cross-sectional area of the flow path of the liquid medium flowing into the second flow path 212 is reduced, so that the liquid medium flowing into the second flow path 212 is contracted to generate pressure. Loss occurs. In addition, since the extending direction of the groove 234 is inclined with respect to the extending direction of the accommodation space 235, the direction of the flow of the liquid medium flowing into the second flow path 212 from the third opening 231 is changed. . Therefore, pressure loss occurs in the liquid medium flowing into the second flow path 212 in the third opening 231. This makes it difficult for the liquid medium to flow through the second flow path 212. Accordingly, since the proportion of the liquid medium flowing along the inner wall surface 236 in the liquid medium flowing through the accommodation space 235 is reduced, the heat exchange efficiency of the liquid medium is improved.

  Further, the liquid medium flowing through the second flow path 212 flows in a direction inclined with respect to the extending direction of the accommodation space 235 along the plurality of rows of grooves 234. Thereby, compared to the case where the extending direction of the plurality of rows of grooves 234 and the extending direction of the accommodating space 235 coincide with each other, the flow path length of the liquid medium flowing through the second flow path 212 is increased, The contact length between the liquid medium flowing through the second flow path 212 and the wire 22 is increased. Accordingly, the heat exchange efficiency of the liquid medium flowing through the second flow path 212 is improved.

  Next, when the piston 30 is moved to the “second position” shown in FIG. 2, the wire 12 of the first MCM heat exchanger 10 is magnetized and the temperature rises, while the second MCM heat exchanger The 20 wires 22 are demagnetized and the temperature is lowered.

  At the same time, the switching valve 90 causes the pump 70 → second high temperature side pipe 84 → second MCM heat exchanger 20 → second low temperature side pipe 82 → low temperature side heat exchanger 50 → first low temperature side pipe. A second path consisting of 81 → first MCM heat exchanger 10 → first high temperature side pipe 83 → high temperature side heat exchanger 60 → pump 70 is formed.

  For this reason, the liquid medium is cooled by the wire 22 of the second MCM heat exchanger 20 whose temperature has decreased due to demagnetization, the liquid medium is supplied to the low temperature side heat exchanger 50, and the low temperature side heat exchanger 50 is To be cooled.

  At this time, in the accommodation space 235 of the second MCM heat exchanger 20, the liquid medium showing a large proportion of the whole passes through the first flow path 211 on the center side, and the remaining part of the liquid medium And passes through the second channel 212 on the outer peripheral side. The liquid medium passing through the first flow path 211 is cooled by the plurality of wires 22 by contacting the plurality of wires 22 surrounding the first flow path 211. Further, the liquid medium passing through the second flow path 212 is cooled by the wire 22 by contacting the outermost wire 22 in the assembly 21.

  Here, one end of the plurality of rows of grooves 234 formed over the entire inner wall surface 236 is positioned in the fourth opening 232. Therefore, in the fourth opening 232, the cross-sectional area of the flow path of the liquid medium flowing into the second flow path 212 is reduced, so that a contraction flow is generated in the liquid medium flowing into the second flow path 212, and the pressure Loss occurs. Further, since the extending direction of the groove 234 is inclined with respect to the extending direction of the accommodating space 235, the direction of the flow of the liquid medium flowing into the second flow path 212 from the second opening 132 is changed. . Therefore, in the fourth opening 232, a pressure loss occurs in the liquid medium flowing into the second flow path 212. This makes it difficult for the liquid medium to flow through the second flow path 212. Accordingly, since the proportion of the liquid medium flowing along the inner wall surface 236 in the liquid medium flowing through the accommodation space 235 is reduced, the heat exchange efficiency of the liquid medium is improved.

  Further, the liquid medium flowing through the second flow path 212 flows in a direction inclined with respect to the extending direction of the accommodation space 235 along the plurality of rows of grooves 234. Thereby, compared to the case where the extending direction of the plurality of rows of grooves 234 and the extending direction of the accommodating space 235 coincide with each other, the flow path length of the liquid medium flowing through the second flow path 212 is increased, The contact length between the liquid medium flowing through the second flow path 212 and the wire 12 is increased. Accordingly, the heat exchange efficiency of the liquid medium flowing through the second flow path 212 is improved.

  On the other hand, the liquid medium is heated by the wire 12 of the first MCM heat exchanger 10 that has been magnetized and the temperature has risen, and the liquid medium is supplied to the high temperature side heat exchanger 60, and the high temperature side heat exchanger 60. Is heated.

  At this time, in the accommodation space 135 of the first MCM heat exchanger 10, the liquid medium occupying a large proportion of the whole passes through the first flow path 111 on the center side, and the remaining part of the liquid medium is The second flow path 112 on the outer peripheral side passes. The liquid medium passing through the first flow path 111 is heated by the plurality of wires 12 by coming into contact with the plurality of wires 12 surrounding the first flow path 111. In addition, the liquid medium passing through the second flow path 112 is heated by the wire 12 by contacting the outermost wire 12 in the assembly 11.

  Also in this case, one end of the plurality of rows of grooves 134 formed over the entire inner wall surface 136 is positioned in the second opening 132. Therefore, in the second opening 132, the cross-sectional area of the flow path of the liquid medium flowing into the second flow path 112 decreases, so that a contraction flow occurs in the liquid medium flowing into the second flow path 112, and the pressure Loss occurs. Further, since the extending direction of the groove 134 is inclined with respect to the extending direction of the accommodation space 135, the flow direction of the liquid medium flowing into the second flow path 112 from the second opening 132 is changed. . Therefore, a pressure loss occurs in the liquid medium flowing into the second flow path 112 at the second opening 132. This makes it difficult for the liquid medium to flow through the second flow path 112. Accordingly, since the proportion of the liquid medium flowing along the inner wall surface 136 in the liquid medium flowing through the accommodation space 135 is reduced, the heat exchange efficiency of the liquid medium is improved.

  Further, the liquid medium flowing through the second flow path 112 flows in a direction inclined with respect to the extending direction of the accommodation space 135 along the plurality of rows of grooves 134. Thereby, compared with the case where the extending direction of the plurality of rows of grooves 134 and the extending direction of the accommodating space 135 coincide with each other, the flow path length of the liquid medium flowing through the second flow path 112 is increased, The contact length between the liquid medium flowing through the second flow path 112 and the wire 12 is increased. Therefore, the heat exchange efficiency of the liquid medium flowing through the second flow path 112 is improved.

  Then, the reciprocating movement between the “first position” and the “second position” of the piston 30 described above is repeated, and the wires 12 and 22 in the first and second MCM heat exchangers 10 and 20 are repeated. By repeating the application / removal of the magnetic field, the cooling of the low temperature side heat exchanger 50 and the heating of the high temperature side heat exchanger 60 are continued.

  The 1st and 2nd MCM heat exchangers 10 and 20 of this embodiment have the following effects. In addition, since the effect of the 2nd MCM heat exchanger 20 is the same as the effect of the 1st MCM heat exchanger 10, the overlapping description is abbreviate | omitted and the description about the 1st MCM heat exchanger 10 is used. To do.

  In the present embodiment, the plurality of rows of grooves 134 are formed on the inner wall surface 136 of the container 13 so as to extend along the direction inclined with respect to the extending direction of the accommodation space 135 in the container 13. In the first opening 131 or the second opening 132, a pressure loss occurs in the liquid medium flowing into the second flow path 112. Thereby, the ratio of the liquid medium flowing into the second flow path 112 from the first opening 131 or the second opening 132 can be reduced. Therefore, a larger proportion of the liquid medium flowing into the accommodation space 135 from the first opening 131 or the second opening 132 can pass through the first flow path 111 on the center side. The heat exchange efficiency of the first MCM heat exchanger 10 can be improved.

  Further, since the extending direction of the plurality of rows of grooves 134 formed over the entire inner wall surface 136 is inclined with respect to the extending direction of the accommodation space 135, the liquid flowing through the second flow path 112. The flow path length of the medium can be extended. Therefore, the contact length between the liquid medium flowing through the second flow path 112 and the wire 12 can be extended, so that the heat exchange efficiency of the first MCM heat exchanger 10 can be improved.

  Further, in this embodiment, the assembly 11 composed of a plurality of wires 12 that are MCM materials is accommodated in the accommodation space 135 of the container 13, and the plurality of wires 12 are not extended in the accommodation space 135. It extends along the current direction. Thereby, since the first flow path 111 formed between the adjacent wires 12 extends along the extending direction of the accommodation space 135, the first opening 131 or the second opening 132 is used. The liquid medium that has flowed into the first flow path 111 passes through the first flow path 111 without changing its orientation. Therefore, since the pressure loss generated in the liquid medium flowing into the first flow path 111 can be suppressed, the ratio of the liquid medium flowing through the first flow path 111 on the center side among the liquid media flowing through the accommodation space 135 is increased. The heat exchange efficiency of the first MCM heat exchanger 10 can be improved.

  FIG. 8 is a cross-sectional view showing the first and second MCM heat exchangers 10 and 20 according to the modification, and FIG. 9 shows the first and second MCM heat exchangers 10 and 20 according to the modification. FIG. 3 is a development view showing containers 13 and 23. Since the first MCM heat exchanger 10 and the second MCM heat exchanger 20 have the same configuration, only the configuration of the first MCM heat exchanger 10 will be described below. The configuration of the MCM heat exchanger 20 will be omitted. Therefore, in FIG.8 and FIG.9, the 1st MCM heat exchanger 10 is shown, About the 2nd MCM heat exchanger 20, the code | symbol corresponding to a parenthesis is attached | subjected and illustration is abbreviate | omitted. Moreover, the repeated description about the structure similar to the 1st and 2nd MCM heat exchangers 10 and 20 which concern on the above-mentioned embodiment is abbreviate | omitted, and the description made about the above-mentioned embodiment is used.

  As shown in FIG. 8, the container 13 is configured in a cylindrical shape. The wire 12 extends linearly, and the extending direction of the wire 12 coincides with the axial direction of the container 13. That is, the extending direction of the wire 12 coincides with the extending direction of the accommodation space 135 formed in the container 13. Further, the axis of the container 13 is positioned coaxially with the center of the assembly 11. That is, the extending direction of the accommodation space 135 formed in the container 13 and the axial direction of the assembly 11 are the same.

  As shown in FIGS. 8 and 9, a plurality of rows of grooves 134 are formed on the inner wall surface 136 of the container 13. The plurality of rows of grooves 134 are formed such that unevenness is repeated in the circumferential direction of the accommodation space 135. Examples of the cross-sectional shape when the groove 134 is cut in a cross-section orthogonal to the axial direction of the container 13 include a triangular shape as shown, a rectangular shape, an arc shape, or the like.

  Here, as shown in FIG. 9, the groove 134 extends spirally on the inner wall surface 136. The inclination angle of the groove 134 with respect to the axial direction of the container 13 (that is, the extending direction of the accommodation space 135 in the container 13) is not particularly limited, but is preferably 15 to 45 °, for example. More preferably.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment includes all design changes and equivalents belonging to the technical scope of the present invention.

  For example, the configuration of the magnetic heat pump apparatus described above is an example, and the heat exchanger according to the present invention may be applied to another magnetic heat pump apparatus of an AMR (Active Magnetic Refrigerataion) system.

  In addition, the magnetic heat pump device includes a first MCM heat exchanger, a magnetic field changing unit that applies a magnetic field to the MCM and changes the magnitude of the magnetic field, and a first connected to the MCM heat exchanger via a pipe. And a second external heat exchanger and fluid supply means for supplying fluid from the MCM heat exchanger to the first or second external heat exchanger in conjunction with the operation of the magnetic field changing means.

  Moreover, although the above-mentioned embodiment demonstrated the example which applied the magnetic heat pump apparatus to air conditioners, such as home use or a motor vehicle, it is not specifically limited to this. For example, by selecting an MCM having an appropriate Curie temperature according to the application, the magnetic heat pump device according to the present invention can be applied to an application in a cryogenic temperature region such as a refrigerator or an application in a certain high temperature region. May be.

  Further, in the present embodiment, the rectangular and cylindrical containers 13 are exemplified, but the present invention is not particularly limited thereto, and a cylindrical container having a polygonal cross section may be used.

  In the present embodiment, the first and second MCM heat exchangers 10 and 20 have the same configuration, but are not particularly limited thereto, and may have different configurations. . For example, wires having different wire diameters may be used between the first and second MCM heat exchangers 10 and 20.

  In the present embodiment, the MCM heat exchanger is configured by a single assembly. However, the present invention is not particularly limited to this, and a plurality of assemblies are arranged along the extending direction of the MCM heat exchanger. It may be provided and configured. In this case, the plurality of aggregates may have the same configuration or different configurations.

  If the magnetic heat pump device is continuously used, in the MCM heat exchanger, a temperature gradient is generated in which the side connected to the high temperature side pipe becomes high temperature and the side connected to the low temperature side pipe becomes low temperature. For this reason, in the above example, the wire constituting the aggregate located on the high temperature side among the plurality of aggregates arranged side by side employs a material having a relatively high Curie point (Curie temperature), and on the low temperature side. It is preferable to employ a material having a relatively low Curie point as the wire constituting the aggregate. As described above, the magnetocaloric effect can be applied more efficiently by using the wire made of the material having different Curie points corresponding to the temperature atmosphere in the MCM heat exchanger.

DESCRIPTION OF SYMBOLS 1 ... Magnetic heat pump apparatus 10 ... 1st MCM heat exchanger 11 ... Aggregate 111 ... 1st flow path 112 ... 2nd flow path 12 ... Wire rod 13 ... -Container 131 ... 1st opening 132 ... 2nd opening 134 ... Groove 135 ... Storage space 136 ... Inner wall surface 137 ... Corner | angular part 16 ... 1st adapter 161 ... 1st connection port 17 ... 2nd adapter 171 ... 2nd connection port 20 ... 2nd MCM heat exchanger 21 ... Assembly 211 ... 1st flow Path 212 ... second flow path 22 ... wire rod 23 ... container 231 ... third opening 232 ... fourth opening 234 ... groove 235 ... accommodation space 236 ... -Inner wall surface 237 ... Corner 26 ... Third adapter 261 ... First connection port 27 ... Fourth Adapter 271 ... Second connection port 30 ... Piston 35 ... Actuator 40 ... Permanent magnet 50 ... Low temperature side heat exchanger 60 ... High temperature side heat exchanger 70 ... Pump 81 ... first low temperature side pipe 82 ... second low temperature side pipe 83 ... first high temperature side pipe 84 ... second high temperature side pipe 90 ... switch valve

Claims (3)

A heat exchanger used in a magnetic heat pump device,
A magnetocaloric material that exhibits a magnetocaloric effect;
A container having a storage space for storing the magnetocaloric effect material;
The container includes a plurality of rows of grooves formed on an inner wall surface that defines the accommodation space,
The plurality of rows of grooves extend along a direction inclined with respect to the extending direction of the housing space. The heat exchanger according to claim 1,
The magnetocaloric effect material is a wire,
An assembly composed of a plurality of the wires is housed in the housing space,
The plurality of wires are heat exchangers extending along an extending direction of the accommodation space. At least one heat exchanger according to claim 1 or 2,
A magnetic field changing means for applying a magnetic field to the magnetocaloric material and changing the magnitude of the magnetic field;
First and second external heat exchangers respectively connected to the accommodation space of the heat exchanger via piping;
A magnetic heat pump apparatus comprising: fluid supply means for supplying fluid from the heat exchanger to the first or second external heat exchanger in conjunction with the operation of the magnetic field changing means.

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