JP2011058709A - Magnetic temperature adjusting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To configure a heat exchange part of a structure capable of improving heat exchange efficiency between a heat transfer medium, and a magnetic work substance filled in an interior of a heat exchange tank. <P>SOLUTION: A magnetic refrigerating device includes the heat exchange part 31 composed by including: the heat exchange tank 15 circulating a medium 20 in a state filled with the magnetic work substance 50 and applied with a magnetic field from an exterior; one or more partition plates 33 disposed along a circulating direction of the medium 20 in an interior of the heat exchange tank 15; and lead-in/lead-out parts 32 respectively disposed on both ends of the heat exchange tank 15, and leading in the medium 20 flowing in from a direction in parallel with an opening face of the heat exchange tank 15 in the heat exchange tank 15, or leading out the medium 20 having passed through the heat exchange tank 15 in an opposite direction of an inflow direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a magnetic temperature control apparatus having a heat exchanging unit including a heat exchanging tank in which a heat transfer medium is circulated while being filled with a magnetic working substance and a magnetic field is applied from the outside.

  For example, Patent Document 1 includes a plurality of heat exchange tanks filled with a magnetic working substance, which are connected to circulate a heat transfer medium, and a magnetic field (magnetic field) is applied to the heat exchange tank from the outside. An apparatus has been disclosed in which the magnetic entropy is greatly changed by removing a magnetic field, thereby generating a magnetocaloric effect, and heat exchange is performed.

  By the way, when the heat transfer medium is circulated in the heat exchange tank as described above, assuming that the piping is arranged in a compact manner, for example, as shown in FIG. 12, the heat transfer medium is introduced from the upper end side of the heat exchange tank. However, the heat transfer medium is led out from the lower end side (the upside and downside of the introduction and the outflow may be reversed), and the inflow and outflow directions of the heat transfer medium are parallel to the opening surface of the heat exchange tank and opposite to each other. It is possible. The heat exchange tank 101 has a rectangular parallelepiped shape that is open at the top and bottom, and is filled with a magnetic working substance 102. For the convenience of illustration, the magnetic working substance 102 is shown enlarged from the actual size, and the actual particle size is about several μm.

  A rectangular box-shaped heat transfer medium tube 103 is connected to the upper end side of the heat exchange tank 101 and communicates with the upper end opening of the heat exchange tank 101. Then, for example, the heat transfer medium sent out by applying pressure from the right direction in the figure is introduced into the heat exchange tank 101 from the upper end. Similarly, a rectangular box-shaped heat transfer medium tube 104 is connected to the lower end side of the heat exchange tank 101 and communicates with the lower end opening of the heat exchange tank 101. The heat transfer medium after flowing through the heat exchange tank 101 and exchanging heat with the magnetic working substance 102 is led out from the lower end of the heat exchange tank 101 in the left direction in the figure.

  When the magnetic working material 102 generates heat in the process of applying a magnetic field to the heat exchange tank 101, the heat transfer medium that has flowed out is sent to the high temperature side (heat radiation side), and the magnetic field applied to the heat exchange tank 101 is removed. When the magnetic working material 102 absorbs heat in the process, the flowed heat transfer medium is sent to the low temperature side (heat absorption side).

JP 2006-308197 A

However, in the configuration shown in FIG. 12, when the heat transfer medium flows through the heat exchange tank 101, the flow of low fluid resistance is preferentially distributed, so There is a problem that heat exchange is difficult to be performed throughout, and heat exchange efficiency is lowered.
The present invention has been made in view of the above circumstances, and its purpose is a structure capable of improving the heat exchange efficiency between the heat transfer medium and the magnetic working material filled in the heat exchange tank. Another object of the present invention is to provide a magnetic temperature control device having a heat exchange unit.

In order to achieve the above object, a magnetic temperature control apparatus according to claim 1 is a heat exchange tank in which a heat transfer medium is circulated in a state filled with a magnetic working substance and a magnetic field is applied from the outside,
In this heat exchange tank, one or more partition plates arranged along the direction in which the heat transfer medium flows;
A heat transfer medium that is arranged at both ends of the heat exchange tank and that flows in from a direction parallel to the opening surface of the heat exchange tank is introduced into the heat exchange tank, or a heat transfer medium that passes through the heat exchange tank And a heat exchanging unit configured to include an introduction / derivation unit that derives in a direction opposite to the inflow direction.

  According to the magnetic temperature control apparatus of the first aspect, the space of the heat exchange tank is divided into a plurality of parts by the partition plate arranged inside the heat exchange tank, and the heat transfer medium divides and circulates in these spaces. Thus, the heat transfer medium flows more uniformly in the tank, and heat exchange with the magnetic working substance is efficiently performed.

The perspective view which is 1st Example and shows the structure of the heat exchange part in the state which permeate | transmitted the part The figure which shows an example of the result of having measured a horizontal axis as dimensional ratio A / B and making a vertical axis into flow velocity uniformity. The figure which shows the result of having simulated the bubble mixing rate at the time of sending a medium to a heat exchange part in the state which does not perform R chamfering in an introductory / outlet part (A) is a figure which shows the state which the magnetic working substance adhered to the partition plate in model, (b) is a figure which shows in model the inner wall surface of a heat exchange tank. The figure which shows roughly the longitudinal front of the internal structure of a magnetic refrigeration equipment Cross-sectional view schematically showing the rotor and its surrounding structure The perspective view which shows a rotor and its peripheral structure roughly Schematic diagram of piping connection Timing chart showing timing of change of magnetic field and transport of hot / cold heat The front view which is 2nd Example and shows the structure of a heat exchange part modelly (A) is the simulation result of the bubble mixing rate when the medium flows into the heat exchange part of the first embodiment, and (b) is a diagram showing the result of the heat exchange part of the second embodiment. 1 equivalent diagram showing the prior art

(First embodiment)
The first embodiment will be described below with reference to FIGS. FIG. 5 schematically shows a longitudinal front view of the internal structure of the magnetic refrigeration apparatus. A magnetic refrigeration apparatus (magnetic temperature adjustment apparatus) A includes a control circuit 1 as a control means, a motor 3 as a rotation drive unit mounted in a cylindrical housing 2, a rotation shaft (rotation shaft) 4, A heat exchanger 5, a rotor 6, and a bearing 7 are provided.

  The motor 3 is constituted by, for example, a stepping motor with a gear head, and is configured to be capable of rotation control based on a control signal from the control circuit 1. The motor 3 may be constituted by a permanent magnet motor such as a brushless DC motor. A rotation shaft 4 is inserted through the center of the motor 3 and is configured to be rotatable in the circumferential direction of the rotation shaft 4 (around the Y axis). A bearing 7 is fixed to the housing 2, and the rotating shaft 4 is supported by the bearing 7. The motor 3 is connected to the rotator 6 via the rotation shaft 4, and the rotator 6 is rotatable in the circumferential direction of the rotation shaft 4. The rotor 6 includes an inner yoke 8, an inner magnet 9, an outer yoke 10, and an outer magnet 11 that are connected to each other by a housing 12.

FIG. 6 is a cross-sectional view schematically showing the structure of the rotor 6 and the surrounding arrangement structure along the X direction. FIG. 7 is a perspective view schematically showing a specific structure of the motor, the rotor, and the periphery thereof when the inside of the housing 2 shown in FIG.
As shown in FIG. 7, the inner yoke 8 of the rotor 6 is configured to be connected to the rotating shaft 4. As shown in FIG. 6, the inner yoke 8 and the inner magnet 9 are connected by disposing the inner yoke 8 on the center side of the rotating shaft 4 and the inner magnet 9 on the outer side thereof. The number of the inner magnets 9 is an even number (four). The inner magnets 9 have a radial shape from the center with the rotation shaft 4 as the center, and are projected at a predetermined interval in the circumferential direction. In addition, the number of the inner magnets 9 should just be an even number, and is not restricted to four.
In addition, an outer magnet 11 and an outer yoke 10 are disposed apart from the inner magnet 9. The plurality of outer magnets 11 are disposed on the center side, and an outer yoke 10 is disposed on the outer side of the plurality of outer magnets 11. The outer magnets 11 are connected along the circumferential direction of the rotating shaft 4. Projecting toward the axial center direction.

  The outward projecting ends of the plurality of inner magnets 9 and the inward projecting ends of the plurality of outer magnets 11 face each other with their opposite polarities facing each other, and a gap 13 is formed between them. Is provided. The inner magnet 9 and the outer magnet 11 are both permanent magnets, and are formed and arranged in a so-called circular arc shape around the rotation shaft 4. Note that the magnetic poles facing the gap 13 by the inner magnets 9, 9 adjacent to each other in the circumferential direction of the rotating shaft 4 are set to be different from each other, and the gap 13 is formed by the outer magnets 11, 11 adjacent in the circumferential direction. The magnetic poles facing the side are also set to be different from each other.

  The gaps 13 are connected by a frame (not shown) and are communicated along the circumferential direction of the rotating shaft 4 by a communication hole 14 provided inside the frame. In this communication hole 14, the heat exchange tank 15 and the auxiliary | assistant magnetic body 16 are provided corresponding to the number of the inner magnets 9 and the outer magnets 11, respectively, for example. In the communication hole 14, the heat exchange tank 15 and the auxiliary magnetic body 16 are alternately arranged along the circumferential direction of the rotation shaft 4. Between the heat exchange tank 15 and the auxiliary magnetic body 16, a space 14 a that is a part of the communication hole 14 can exist, and the auxiliary magnetic body 16 extends along a frame that extends between the gaps 13. Thus, the inside of the communication hole 14 is configured to be movable.

The plurality of heat exchange tanks 15 each have a magnetic working material 50 that exhibits a magnetocaloric effect by a gadolinium (Gd) ferromagnetic material or a magnetic material such as a lanthanum-iron-silicon (La-Fe-Si) system. Is filled. The magnetic working substance 50 is composed of, for example, spherical particles and fine particles. The plurality of heat exchange tanks 15 are provided in the housing 2 in a fixed installation form.
The auxiliary magnetic body 16 functions as a magnetically permeable substance and a magnetic retentive substance, and is preferably made of the above-described magnetic material having the same magnetic characteristics as the magnetic working substance 50, for example. In the auxiliary magnetic body 16, the arc angle corresponding to the circumferential length of the rotating shaft 4 is set to be the same as the arc angle (for example, 30 °) corresponding to the circumferential length of the gap 13.

  Refer to FIG. 1 again. The heat exchanger 5 includes a heat exchange tank 15, a pump 17, pipes 18 and 19, a medium (heat transfer medium) 20, an exhaust heat unit 21, and a cooling / heating unit 22. The pump 17 is disposed in the housing 2 and is attached to the rotating shaft 4. The pump 17 may be installed outside the housing 2.

The motor 3 is connected to the pump 17 via the rotating shaft 4 and drives the pump 17. Thereby, it can reduce in size compared with the structure which provides the drive source of the other pump 17 in the exterior of the housing 2. FIG. A pipe 18 is connected to the pump 17, and the pipe 18 is connected to an upper portion of the heat exchange tank 15. By the action of the pump 17, the medium 20 flows into and out of the heat exchange tank 15 through the pipe 18 (inflow / inflow). Outflow). The medium 20 is a liquid such as water.
The pipe 19 is connected to the lower part of the heat exchange tank 15, and is configured so that the medium 20 can flow (inflow / outflow) into and out of the heat exchange tank 15 through the pipe 19 by the action of the pump 17. ing. When the medium 20 flows into the heat exchange tank 15 and comes into contact with the magnetic working material 50, the medium 20 is heated (hot state) or cooled (cold state) according to the state of magnetism applied to the magnetic working material 50. To do.

The piping 18 is connected to the exhaust heat unit 21 via a valve (not shown), and the piping 19 is connected to the cooling unit 22 via a valve (not shown). The exhaust heat section 21 and the cool heat section 22 are arranged outside the housing 2 so as to be separated from each other, and the cool heat section 22 is configured to accumulate cold heat and exhaust the warm heat from the exhaust heat section 21. In other words, the heat exchanger 5 causes the heat of the medium 20 to be exhausted in the exhaust heat unit 21 through the pipe 18 at the timing when the medium 20 stores the warm heat by the action of the pump 17, and at the timing when the medium 20 stores the cold. Heat is exchanged by accumulating the cold energy of the medium 20 in the cold heat part 22 through the pipe 19.
FIG. 8 schematically shows the connection form of the pipes of the heat exchanger, and the pump 17 and the plurality of heat exchange tanks 15 are connected in series by pipes 18 and 19. The medium 20 can flow in the Y direction (direction orthogonal to the XZ direction) in the heat exchange tank 15.

FIG. 9 schematically shows a specific example of magnetic field application timing and heat transport timing to the heat exchange tank 15 (magnetic working material 50) during heat exchange. When a magnetic field is applied to the magnetic working material 50 in the heat exchange tank 15 with a strong magnetic flux density (for example, 1.2 T), the magnetic working material 50 generates heat in the process ((1) in FIG. 9). In this state, the control circuit 1 drives and controls the motor 3 to drive the pump 17 and pass the medium 20 through the outer wall material 15b of the heat exchange tank 15 to transport the heat to the exhaust heat unit 21 (see FIG. 9). (2)).
When the magnetic flux density applied to the magnetic working material 50 in the heat exchange tank 15 is reduced, the magnetic working material 50 absorbs heat in the process ((3) in FIG. 9). In this state, the control circuit 1 drives and controls the motor 3 to drive the pump 17 to pass the medium 20 through the heat exchange tank 15 and transport the cold to the cold heat unit 22 ((4) in FIG. 9). By repeating such a heat transport cycle and a heat exchange cycle, cold heat can be accumulated in the cold heat unit 22.

  FIG. 1 is a perspective view showing in detail the configuration of the heat exchanging section 31 centered on one heat exchanging tank 15 in a state where a part of the heat exchanging section 31 is transmitted. The heat exchanging unit 31 is connected to the heat exchange tank 15, an introduction / derivation unit 32 </ b> U for connecting the upper side in the drawing to the pipe 18, and an introduction for connecting the lower side of the heat exchange tank 15 in the figure to the pipe 19. / Deriving unit 32D. About the introduction / derivation | leading-out part 32U, the surface side which opposes the side to which the piping 18 is connected is R chamfered, and becomes the curved surface 32Ua. Similarly, for the introduction / derivation portion 32D, the surface facing the side to which the pipe 19 is connected is R-chamfered to form a curved surface 32Da.

  Although not shown in FIGS. 5 to 8, inside the heat exchange tank 15, a plurality of partition plates 33 are arranged in parallel with each other in advance, and the outer wall surface of the heat exchange tank 15 These are arranged along the vertical direction in the figure so that the arrangement interval including the interval is a constant value B. The magnetic working material 50 is filled in a plurality of spaces partitioned by a plurality of partition plates 33.

  As shown in FIG. 8, the configuration in which a plurality of heat exchange tanks 15 are connected in series is configured such that the heat exchanging units 31 configured as described above are introduced / derived units 32U on the upper end side in adjacent ones, The inlet / outlet portions 32U on the lower end side are connected to each other.

  Here, the length of the heat exchange tank 15 in the vertical direction in the figure is A, and the arrangement interval of the partition plates 33 arranged in the heat exchange tank 15 is B. As the number of partition plates 33 arranged in the heat exchange tank 15 increases, the dimensional ratio A / B increases. The dispersion of the flow rate of the medium 20 in the width direction of the heat exchange tank 15 at this time can be obtained by fluid analysis (the difference between the maximum value and the minimum value of the flow rate divided by the average value of the flow rate) The reciprocal of the variation value indicates the uniformity of the flow rate (flow rate uniformity).

FIG. 2 shows an example of the result of actual measurement with the horizontal axis being A / B and the vertical axis being the flow velocity uniformity. The flow velocity uniformity is a value normalized so that the upper limit value is “1”. Since the number of plotted samples is small, a curve approximated by a sixth-order polynomial is also shown. From this result, the conditions for good flow rate uniformity are approximately
2.9 ≦ A / B ≦ 3.6 (1)
It can be said that.

However, since the influence of the introduction / derivation unit 32 is not considered in the expression (1), the following condition is added. The vertical dimension of the introduction / derivation unit 32 is C, and the horizontal dimension in the drawing is D. From FIG. 2, in the range where the dimensional ratio A / B is in the range of “2.0 to 3.6”, the (flow velocity uniformity) ∝A / B (2)
Can be considered. Also, since the flow rate uniformity depends on the flow path resistance,
(Flow rate uniformity) ∝ C / D (3)
Also holds. Therefore, from equations (2) and (3),
(Flow rate uniformity) ∝ (A / B) x (C / D) (4)
It can be expressed as. Multiplying both sides of equation (4) by D / C,
(Uniformity of flow rate) x (D / C) ∝ (A / B) (5)
Therefore, the relational expression
A / B∝D / C (6)
Is obtained. Therefore, the dimension ratio D / C of the introduction / derivation part 32 must be reflected in the range in which the dimension ratio A / B is determined.

The dimension ratio D / C when the measurement of FIG. 2 was performed was “5”. Therefore, from equation (1)
0.58D / C ≦ A / B ≦ 0.72D / C (7)
If the dimensional ratio A / B is determined within a range satisfying the expression (7), the flow velocity uniformity can be ensured satisfactorily. In order to set the distance between the partition plates 33 located at both ends and the outer wall surface of the heat exchange tank 15 to B, the condition D = n · B (n is a natural number of 3 or more) needs to be satisfied. Then equation (7) becomes
0.58n · B / C ≦ A / B ≦ 0.72n · B / C (8)
It becomes.

In addition, the ratio of each dimension AD of the heat exchange part 31 which the inventor actually produced as a result of A / B = 3 and D = 3B with the dimension C as a reference (= 1),
A: B: C: D = 5: 1.7: 1: 5 (9)
It has become. Thereby, the flow rate uniformity when the heat exchange tank 15 is partitioned by the two partition plates 33 can be secured satisfactorily.

  Further, FIG. 3 simulates the bubble mixing rate when the medium 20 is sent from the pipe 18 side to the heat exchanging unit 31 without performing the R chamfering process on the introduction / derivation unit 32, that is, without forming the curved surface 32a. Results are shown. In this case, when the pump 17 sends out the medium 20, the medium 20 is introduced into the heat exchange tank 15 from the upper inlet / outlet part 32U, flows through the heat exchange tank 15 from the upper side to the lower side, and is introduced below. / Derived from the lead-out portion 32D to the pipe 19 side. When the pump 17 sucks the medium 20, the above flow is reversed (introduction / extraction is reversed).

  The actual air bubble mixture rate is difficult to understand because it is displayed in color, but the cold color tendency is strong, the dark color is displayed in the part where the mixture rate is low, and conversely the warm color tendency is strong and the color is displayed in light color The contamination rate is high. In addition, the bubble mixture rate is particularly high in the corner portion of the introduction / derivation portion 32D (the side opposite to the side communicating with the pipe 19) circled in the drawing. Accordingly, by performing the R chamfering process as shown in FIG. 1, the portion where the bubble mixing rate becomes high is deleted, and as a result, the medium 20 flows more uniformly.

  FIG. 4A schematically shows a state in which the magnetic working material 50 is fixed to the partition plate 33. For the partition plate 33, it is preferable to use a resin-based heat insulating material such as polyacetal (POM) in order to maintain the temperature difference between the upstream side and the downstream side as much as possible. In (a), the partition plate 33 is formed in a mesh shape having a lattice interval of approximately the same size as the particle size of the magnetic working material 50, so that the magnetic working material 50 is filled between the lattices. Show.

  On the other hand, FIG. 4B shows an inner wall surface 15a of the heat exchange tank 15 as a model. By selecting a material whose hardness is lower than that of the magnetic working material 50 on the inner wall surface 15a of the heat exchange tank 15, when the magnetic working material 50 is filled, a state in which the inner wall surface 15a is embedded in the inner working wall 15a is shown. Yes. By configuring as above, the packing density of the magnetic working substance 50 in the heat exchange tank 15 can be further increased, and the heat exchange efficiency can be improved.

  As described above, according to this embodiment, the medium 20 is circulated in the magnetic refrigeration apparatus A in a state where the magnetic working substance 50 is filled, and the heat exchange tank 15 to which a magnetic field is applied from the outside, and the heat exchange. Inside the tank 15, a plurality of partition plates 33 arranged along the direction in which the medium 20 circulates, and arranged at both ends of the heat exchange tank 15, flow in from a direction parallel to the opening surface of the heat exchange tank 15. A heat exchanging unit 31 configured to include the introduction / derivation unit 32 that introduces the medium 20 to be introduced into the heat exchange tank 15 or derives the medium 20 that has passed through the heat exchange tank 15 in the direction opposite to the inflow direction. Prepared. Therefore, the partition plate 33 disposed inside the heat exchange tank 15 divides the medium 20 and circulates the tank more uniformly, so that heat exchange with the magnetic working substance 50 is performed efficiently. Become.

  The length of the heat exchange tank 15 and the partition plate 33 in the direction in which the medium 20 flows is A, the arrangement interval of the partition plates 33 is B, and the introduction / lead-out portion 32 is C in the same direction as A. Assuming that the length of the inflow / outflow direction of the medium 20 at the opening surface of the heat exchange tank 15 is D, the relationship of A to D satisfies the equation (8) after satisfying the relationship of D = n · B. Since it is set, the flow velocity uniformity of the medium 20 flowing in the heat exchange tank 15 can be ensured satisfactorily. Furthermore, since the curved surface 32a is formed by R-chamfering the shape of the portion where the inflowing medium 20 abuts in the introduction / derivation unit 32, it is possible to eliminate the part where the bubble mixing rate increases when the medium 20 flows. The medium 20 can be distributed more uniformly.

In addition, since the partition plate 33 is made of a heat insulating material, the temperature difference generated between the upstream side and the downstream side can be maintained as much as possible when the medium 20 is circulated in the heat exchange tank 15 to perform heat exchange. The heat exchange efficiency can be improved.
Further, the partition plate 33 is configured in a mesh shape having a lattice interval similar to the particle size of the magnetic working material 50, and the heat exchange tank 15 is made of a material whose hardness is lower than that of the magnetic working material 50 at least on the inner surface side. Since it comprised, the filling density of the magnetic working substance 50 to the heat exchange tank 15 can be raised more, and heat exchange efficiency can be improved.

(Second embodiment)
10 and 11 show a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. Hereinafter, different parts will be described. FIG. 10 is a front view schematically showing the configuration of the heat exchange unit 41 in the second embodiment. The heat exchanging unit 31 of the first embodiment is configured to allow the medium 20 to flow vertically with respect to the medium 20 flowing in parallel at the upper end side and the lower end side of the heat exchange tank 15, In the heat exchanging unit 41 of the second embodiment, the introduction / derivation unit 32U on the upper end side and the introduction / derivation unit 32D on the lower end side are connected with the heat exchange tank 42 inclined.

  That is, the direction in which the medium 20 is introduced into the heat exchange tank 42 forms an acute angle with respect to the direction in which the medium 20 flows through the introduction / derivation unit 32U, and the direction in which the medium 20 is led out from the heat exchange tank 42. The direction in which the medium 20 flows out through the introduction / derivation unit 32D is inclined so that an acute angle is formed.

  This is due to the following reason. FIG. 11 (a) shows a case where the medium 20 is in a portion where the inlet / outlet portion 32U on the upper end side is orthogonal to the heat exchange tank 15 and the flow path is bent at a right angle, like the heat exchange portion 31 of the first embodiment. The simulation result of the bubble mixing rate in the case of flowing is shown. The bubble mixing rate in dark portions is low, and the bubble mixing rate in light portions is high. The bubble mixing rate is increased at the portion where the medium 20 bends and flows at a right angle. On the other hand, FIG. 11B shows a similar simulation result for the heat exchanging portion 41, and there is no portion where the bubble mixing rate increases as shown in FIG. Shows a uniform flow. The inclination angle of the heat exchange tank 42 is preferably about 45 degrees, for example.

  According to the second embodiment configured as described above, the direction in which the medium 20 is introduced into the heat exchange tank 42 forms an acute angle with respect to the direction in which the medium 20 flows, and the medium 20 is removed from the heat exchange tank 42. Since the heat exchanging portion 41 is configured to have an inclination so that the outflow direction of the medium 20 forms an acute angle with respect to the direction to be led out, bubbles are mixed when the medium 20 flows through the heat exchanging tank 42. And can be distributed uniformly.

The present invention is not limited to the embodiments described above or shown in the drawings, and the following modifications or expansions are possible.
What is necessary is just to set suitably how many pieces of the partition plates 33 are inserted in the heat exchange tank 15 with one or more sheets.
In addition, it is not always necessary to set so as to satisfy the relationship of the expressions (7) and (8). The effect of improving the flow velocity uniformity by simply inserting one or more partition plates 33 as compared with the case of not inserting them. Is obtained.
The magnetic working substance is not limited to those exemplified, and may be appropriately selected and used as long as the magnetocaloric effect can be obtained.
The chamfering process of the introduction / derivation unit 32 may be performed as necessary.

The partition plate 33 is not necessarily composed of a heat insulating material. Moreover, it does not necessarily need to be mesh shape, and plate shape may be sufficient.
The inner wall surface of the heat exchange tank need not be made of a material having a hardness lower than that of the magnetic working substance, and may be made of a material having the same or higher hardness. For example, a material having a lower hardness than the magnetic working substance may be attached to the inner wall surface of the heat exchange tank.
The configuration of the magnetic temperature adjusting device is not limited to that illustrated.

  In the drawing, 15 is a heat exchange tank, 18 and 19 are pipes, 20 is a medium (heat transfer medium), 31 is a heat exchange part, 32 is an introduction / outlet part, 33 is a partition plate, 41 is a heat exchange part, and 42 is A heat exchange tank, 50 is a magnetic working substance, and A is a magnetic refrigeration apparatus (magnetic temperature adjusting apparatus).

Claims (5)

A heat exchange medium in which a heat transfer medium is circulated in a state of being filled with a magnetic working substance and a magnetic field is applied from the outside; and
In this heat exchange tank, one or more partition plates arranged along the direction in which the heat transfer medium flows;
A heat transfer medium that is arranged at both ends of the heat exchange tank and that flows in from a direction parallel to the opening surface of the heat exchange tank is introduced into the heat exchange tank, or a heat transfer medium that passes through the heat exchange tank A magnetic temperature control device comprising: a heat exchanging unit configured to include an introduction / derivation unit that derives in a direction opposite to the inflow direction. When two or more of the partition plates are arranged,
A length of the heat transfer medium and the partition plate in the direction in which the heat transfer medium flows is A,
The arrangement interval of the partition plates is B,
For the introduction / derivation unit, the length in the same direction as A is C,
When the length of the inflow and outflow direction of the heat transfer medium at the opening surface of the heat exchange tank is D,
While satisfying the relationship of D = n · B (n is a natural number of 3 or more), the relationships A to D are
0.58D / C ≦ A / B ≦ 0.72D / C
The magnetic temperature control device according to claim 1, wherein the magnetic temperature control device is set within a range.   The magnetic temperature control device according to claim 1 or 2, wherein a shape of a portion where the inflowing heat transfer medium abuts in the introduction / extraction portion is R-chamfered.   The magnetic temperature control device according to any one of claims 1 to 3, wherein the partition plate is configured in a mesh shape having a lattice interval approximately equal to a particle size of the magnetic working substance.   In the heat exchange tank, the direction in which the heat transfer medium is introduced forms an acute angle with respect to the direction in which the heat transfer medium flows through the introduction / derivation unit, and the direction in which the heat transfer medium is derived. 5. The magnetic temperature control device according to claim 1, wherein the heat transfer medium has a shape with an inclination so that a direction in which the heat transfer medium flows out through the introduction / extraction unit forms an acute angle. .