JP4450174B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger that performs heat exchange between high temperature air and low temperature air, and is particularly suitable when it is desired to completely separate the inside and outside air. For example, for a mobile phone base station that cools a heating element such as a communication device. It is suitable as a heat exchanger for a cooling device.

  As shown in FIG. 13, the heat exchanger 100 described in Patent Document 1 is provided with an inside air passage 101 and an outside air passage 102 adjacent to each other. Each of the passages 101 and 102 includes two rectangular flat plates 103 that are opposed to each other at a constant interval, and a back plate 104 that closes the side of the space formed by the two flat plates 103 in an L shape. By forming the back plate 104 diagonally for each adjacent air passage, the inside air passage 101 and the outside air passage 102 are alternately formed.

As shown in FIG. 14, the heat exchanger 100 configured as described above is attached to the mounting plate portion 301 of the housing 300 via a packing 200 that seals between the internal space and the external space. The packing 200 has a three-dimensional shape corresponding to the L-shaped back plate 104.
JP 2001-99351 A

  However, the heat exchanger 100 described in Patent Document 1 has a problem in that the packing 200 has a three-dimensional shape, so that the assembling property of the packing 200 is poor and the reliability of the sealing property is low.

  Moreover, it has a complicated structure in which the flat plates 103 and the L-shaped back plates 104 are alternately arranged. Furthermore, a sealing technique that does not leak at the joint between the flat plate 103 and the back plate 104 is required.

  In view of the above points, the present invention improves the assemblability of a seal member that seals between the first space and the second space in a heat exchanger that exchanges heat between the air in the first space and the air in the second space. The purpose is to let you.

In order to achieve the above object, according to the first aspect of the present invention, an opening formed in the mounting plate (11) of the housing (1) that partitions the first space (2) and the second space (3). (12) is mounted so as to partition the first space (2) and the second space (3) to exchange heat between the air in the first space (2) and the air in the second space (3). A heat exchanger comprising a first plate (41) and a second plate (42) stacked alternately,
The first plate (41) includes a first side plate portion (411) that extends perpendicularly to the plate stacking direction and extends into the first space (2) and the second space (3), and the first side plate portion (411). ) In the first space (2) in the first partition (412) extending from the edge in the plate stacking direction, parallel to the mounting plate (11) from both ends of the first partition plate (412) A first seal plate portion (413) that extends toward the outside of the first side plate portion (411) and is attached to a portion of the mounting plate portion (11) that surrounds the opening portion (12); The plate (42) includes a second side plate portion (421) that extends perpendicularly to the plate stacking direction and extends into the first space (2) and the second space (3), and the second side plate portion (421). Second partition plate (42) extending in the plate stacking direction from the edge in the second space (3) A) extend outwardly of the mounting plate portion from both ends of the second partition plate section (422) (11) and parallel to and the second side plate portion (421), the first plate (41) and a second plate ( 42) is arranged so as to overlap with the first sealing plate unit as viewed in the stacking direction (413), the mounting plate portion (11) of the second sealing plate that will be attached to the site to be around the opening (12) (423), and a first passage (5) through which the air in the first space (2) flows by the first side plate (411), the second side plate (421), and the second partition plate (422). The second side plate (411), the second side plate (421), and the first partition plate (412) form a second passage (6) through which air in the second space (3) flows. Between the first seal plate portion (413) and the second seal plate portion (423) and the mounting plate portion (11). Characterized in that the member (7) interposed therebetween are mounted on the mounting plate portion (11).

  According to this, since the sealing between the first space and the second space can be performed on a two-dimensional surface, the assembling property of the sealing member can be improved and the reliability of the sealing property can be improved.

  In the invention according to claim 2, the first plate (41) is a first joining plate portion extending in a direction perpendicular to the plate stacking direction from an end portion of the first partition plate portion (412) in the plate stacking direction. (414), and the second plate (42) extends from the end of the second partition plate (422) in the plate stacking direction in a direction orthogonal to the plate stacking direction (424). The first joining plate portion (414) is joined to the second side plate portion (421), and the second joining plate portion (424) is joined to the first side plate portion (411).

  According to this, since the joint portion between the first plate and the second plate comes into contact with the surface, the reliability of the seal of the joint portion can also be improved.

As in the invention described in claim 3 , the first plate (41) and the second plate (42) may have different shapes.

In the invention according to claim 4 , when viewed in the direction of air flow in the fin (44), the air inlet (51) of the first passage (5) and a part of the fin (44) overlap. It is characterized by that.

  According to this, in the part which overlaps in the 1st channel | path, since air flows in into a fin smoothly, a pressure loss becomes small.

According to the fifth aspect of the present invention, when viewed in the air flow direction in the fin (44), the air inlet (61) of the second passage (6) and a part of the fin (44) overlap. It is characterized by that.

  According to this, in the part which overlaps in the 2nd channel | path, since air flows in into a fin smoothly, a pressure loss becomes small.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
A first embodiment of the present invention will be described. 1 is a perspective view schematically showing a state in which the heat exchanger according to the first embodiment is mounted on a housing, FIG. 2 is a perspective view of the housing, and FIG. 3 is a view of the heat exchanger mounting portion of FIG. 4 is a sectional view of a portion of the first plate in the heat exchanger mounting portion of FIG. 1, FIG. 5 is a sectional view of a portion of the second plate in the heat exchanger mounting portion of FIG. 1, and FIG. FIG. 7 is an exploded perspective view of the heat exchanger, FIG. 8 is a perspective view of a plate in the heat exchanger, FIG. 9A is a front view of the plate, and FIG. 9B is a perspective view of the heat exchanger. 9C is a rear view of the plate, FIG. 10 is a front view of the end plate, FIG. 11A is a plan view of the fin, and FIG. 11B is a right side of FIG. 11A. FIG.

  First, a schematic configuration of the cooling device including the heat exchanger according to the first embodiment will be described. As shown in FIGS. 1 to 5, an internal space 2 in which a heating element such as a communication device is accommodated is formed in the housing 1, and a rectangular opening 12 is formed in a flat mounting plate portion 11 of the housing 1. Is formed. A heat exchanger 4 (detailed later) is attached to the opening 12 so as to partition the internal space 2 and the external space 3. The heat exchanger 4 exchanges heat between the hot air in the internal space 2 and the cold air in the external space 3. The internal space 2 corresponds to the first space of the present invention, and the external space 3 corresponds to the second space of the present invention.

  Next, the configuration of the heat exchanger 4 will be described. As shown in FIGS. 6 and 7, the heat exchanger 4 includes a stacking direction (hereinafter simply referred to as “stacking direction”) of a large number of first plates 41 and second plates 42 and first plates 41 and second plates 42 that are alternately stacked. It is composed of an end plate 43 disposed at one end in the stacking direction) and fins 44 disposed in a passage to be described later.

  As shown in FIGS. 4 and 7 to 9, the first plate 41 includes a substantially hexagonal first side plate portion 411 extending perpendicularly to the stacking direction and extending into the internal space 2 and the external space 3. ing. A first partition plate portion 412 extends from the edge portion in the internal space 2 of the first side plate portion 411 in the stacking direction. A first seal plate portion 413 extends from both end portions of the first partition plate portion 412 in parallel with the mounting plate portion 11 of the housing 1. A first bonding plate portion 414 extends from an end portion of the first partition plate portion 412 in the stacking direction in a direction orthogonal to the stacking direction. The first plate 41 is made of an aluminum alloy and is formed by drawing. The first plate 41 uses a clad material.

  The second plate 42 has the same shape, size, and material as the first plate 41. However, as shown in FIG. 7 and the like, the first plate 41 and the second plate 42 are stacked by rotating 180 degrees when viewed from the stacking direction.

  Incidentally, as shown in FIGS. 5 and 7 to 9, the second plate 42 includes a second side plate portion 421 that extends perpendicularly to the stacking direction and extends into the internal space 2 and the external space 3. The second partition plate portion 422 extending in the stacking direction from the edge portion in the external space 3 in the side plate portion 421, and the second seal plate extending in parallel with the mounting plate portion 11 of the housing 1 from both ends of the second partition plate portion 422. Part 423 and a second bonding plate part 424 extending in the direction perpendicular to the stacking direction from the end of the second partition plate 422 in the stacking direction.

  As shown in FIG. 10, the end plate 43 is a substantially hexagonal flat plate, and is substantially the same in shape and size as the first side plate portion 411 of the first plate 41. The material is the same as that of the first plate 41.

  As shown in FIG. 11, the fins 44 are corrugated fins that are joined to the first plate 41 and the second plate to promote heat exchange with air, and are formed in a wave shape when viewed from the air flow direction. A large number of louvers 441 are formed. The louver 441 improves the heat transfer rate by suppressing the growth of the temperature boundary layer by disturbing the air flow so as to meander. The louver 441 is employed in a condenser of a vehicle air conditioner or a radiator for a vehicle. It is similar to what is there. The fins 44 are made of an aluminum alloy, and a clad material or a bare material may be used.

  Next, the manufacturing method of the heat exchanger 4 is demonstrated. As shown in FIGS. 6 and 7, the heat exchanger 4 alternately stacks the first plates 41 and the second plates 42, arranges fins 44 between the first plates 41 and the second plates 42, Integrated brazing is performed with the end plate 43 disposed at one end in the stacking direction. In addition, in a state where the first seal plate portion 413 of the first plate 41 and the second seal plate portion 423 of the second plate 42 are arranged so as to overlap when viewed in the stacking direction, in other words, Integrated brazing is performed in a state where the seal plate portion 413 and the second seal plate portion 423 are not displaced in a direction orthogonal to the stacking direction.

  By this integral brazing, the first joint plate portion 414 of the first plate 41 is joined to the second side plate portion 421 of the second plate 42, and the second joint plate portion 424 of the second plate 42 is joined to the first plate 41 of the first plate 41. The end plate 43 is joined to the first side plate portion 411, the end plate 43 is joined to the second joint plate portion 424 of the second plate 42 located at one end in the stacking direction, and the fins 44 are joined to the first side plate portion 411 and the second side plate portion 421. Be joined.

  Incidentally, the integrally brazed heat exchanger 4 includes the first side plate portion 411, the second side plate portion 421, and the second partition plate portion 422 to form the first passage 5 (see FIG. 5), and the first side plate portion. The second passage 6 (see FIG. 4) is formed by the 411, the second side plate portion 421, and the first partition plate portion 412.

  Next, the whole structure of the cooling device including the heat exchanger 4 will be described. As shown in FIGS. 1 to 5, the integrally brazed heat exchanger 4 is mounted on the mounting plate portion 11 of the housing 1. More specifically, the seal member 7 is applied to the surface on the inner space 2 side around the opening 12 of the mounting plate portion 11, and the heat exchanger 4 includes the first seal plate portion 413 and the second seal plate portion 423. The mounting plate 11 is mounted on the mounting plate 11 so as to partition the internal space 2 and the external space 3 with a seal member 7 interposed therebetween. Thereby, the space between the internal space 2 and the external space 3 is sealed.

  As shown in FIG. 5, the first passage 5 communicates with the internal space 2, and high-temperature air in the internal space 2 is sent to the first passage 5 by a blower. In this example, the air inlet 51 is above the first passage 5 and the air outlet 52 is below the first passage 5, and the high-temperature air flowing in from the air inlet 51 passes through the fins 44 and passes through the air outlet 51. Out of 52. The air flow direction in the fin 44 coincides with an imaginary line connecting the two second seal plate portions 423.

  As shown in FIG. 4, the second passage 6 communicates with the external space 3, and low-temperature air in the external space 3 is sent to the second passage 6 by a blower. In this example, the air inlet 61 is below the second passage 6 and the air outlet 62 is above the second passage 6, and the low-temperature air flowing in from the air inlet 61 passes through the fins 44 and passes through the air outlet 61. 62 flows out. Further, the air flow direction in the fin 44 coincides with an imaginary line connecting the two first seal plate portions 413.

  Therefore, in this embodiment, the air flowing through the first passage 5 flows from the top to the bottom as shown by the arrows, while the air flowing through the second passage 6 flows from the bottom to the top as shown by the arrows. Therefore, the air flowing through the first passage 5 and the air flowing through the second passage 6 are opposed flows.

  As shown in FIGS. 4 and 5, when viewed in the direction of air flow in the fins 44, the air inlet 51 of the first passage 5 and a part of the fins 44 overlap, and the second passage 6 The air inlet 61 and a part of the fin 44 overlap each other.

  Furthermore, the fins 44 in the first passage 5 are located near the air inlet 51 of the first passage 5 (left side in FIG. 5) and far from the air inlet 51 of the first passage 5 (paper surface in FIG. 5). The fin pitch is different from that on the right side. Similarly, the fins 44 in the second passage 6 are also located near the air inlet 61 of the second passage 6 (on the right side in FIG. 4) and far from the air inlet 61 of the second passage 6 (see FIG. 4). The fin pitch is different from that on the left side of the drawing.

  Specifically, the fin pitch at the part far from the air inlets 51 and 61 is larger than the fin pitch at the part near the air inlets 51 and 61, and more specifically, close to the air inlets 51 and 61. The fin pitch gradually increases from the part toward the part far from the part.

  As shown in FIG. 4, a line connecting the end a1 on the air inlet 61 side in the first partition plate portion 412 and the end b1 on the first partition plate portion 412 side and the air inflow side in the fin 44, When the reference line is used, the angle θ1 between the reference line and the first seal plate portion 413 is 120 degrees or more and less than 180 degrees. Similarly, as shown in FIG. 5, the end a <b> 2 on the air inlet 51 side in the second partition plate 422 is connected to the end b <b> 2 on the second partition plate 422 side and on the air inflow side in the fin 44. When the line is a reference line, the angle θ2 between the reference line and the second seal plate portion 423 is also 120 degrees or more and less than 180 degrees.

  Next, a schematic operation of the cooling device including the heat exchanger 4 will be described. The hot air in the internal space 2 is sent to the first passage 5 by the blower, and the low-temperature air in the external space 3 is sent to the second passage 6 by the blower, whereby the air flowing through the first passage 5 and the second passage 6 The air flowing through is exchanged through the first side plate portion 411 and the second side plate portion 421. Note that most of the heat exchange at this time is performed at the portion where the fins 44 are joined. And by this heat exchange, the high temperature air in the internal space 2 is cooled, and the communication apparatus etc. in the housing | casing 1 are cooled by extension.

  In the above-described embodiment, since the surface of the mounting plate portion 11 to which the seal member 7 is applied is a flat surface, in other words, the seal between the internal space 2 and the external space 3 can be performed on a two-dimensional surface, The assembling property of the seal member 7 can be improved, and the reliability of the sealing property can also be improved.

  The first joining plate portion 414 of the first plate 41 is joined to the second side plate portion 421 of the second plate 42, and the second joining plate portion 424 of the second plate 42 is joined to the first side plate portion 411 of the first plate 41. Therefore, the joint portion between the first plate 41 and the second plate 42 comes into contact with the surface, and the reliability of the seal at the joint portion can be improved.

  Since the first plate 41 and the second plate 42 are formed by drawing, the number of joints is smaller than when the plate is formed by bending, and the sealing performance of the heat exchanger 4 as a whole is excellent.

  The first plate 41 and the second plate 42 can be used in common because the same plate can be used if the first plate 41 and the second plate 42 are rotated by 180 degrees when viewed from the stacking direction.

  Since the fins 44 are provided in the first passage 5 and the second passage 6, the heat exchange efficiency between the air flowing through the first passage 5 and the air flowing through the second passage 6 can be increased.

  Since the first plate 41, the second plate 42, and the fins 44 are integrally brazed, the number of processing steps can be greatly reduced. In addition, the sealing performance of the joint is superior to the sealing by the sealing member. Further, since the aluminum alloy parts are in direct contact with each other, heat transfer between them is favorably performed.

  Since the fin pitch of the part far from the air inlets 51 and 61 is made larger than the fin pitch of the part close to the air inlets 51 and 61, the air can easily flow to the part far from the air inlets 51 and 61, The air flow in the first passage 5 and the second passage 6 can be made uniform.

  When viewed in the direction of air flow in the fins 44, the air inlet 51 of the first passage 5 and a part of the fin 44 overlap, and the air inlet 61 of the second passage 6 and a part of the fin 44 are overlapped. Are overlapped, air flows smoothly into the fins 44 at the overlapping portions, and the pressure loss is reduced.

  Since the number of stacked layers of the first plate 41, the second plate 42, and the fins 44 can be freely changed, the ability of the heat exchanger 4 can be easily varied.

  If the heat exchanger 4 of the required size cannot be manufactured by a single brazing due to restrictions at the time of processing, for example, furnace restrictions in the case of integral brazing, it is possible to use a plurality of separately manufactured parts side by side. it can.

(Second Embodiment)
A second embodiment of the present invention will be described. FIG. 12 is a perspective view of a plate in the heat exchanger according to the second embodiment.

  As shown in FIG. 12, in the present embodiment, in order to increase the contact area between the air flowing through the first passage 5 and the air flowing through the second passage 6, Many enlarged heat transfer surfaces 415 and 425 are formed.

  With the enlarged heat transfer surfaces 415 and 425, the heat exchange efficiency between the air flowing through the first passage 5 and the air flowing through the second passage 6 can be increased. Therefore, the fin 44 can be abolished.

(Other embodiments)
In each of the above embodiments, the first plate 41 and the second plate 42 have the same shape, size and material, but they may have different shapes.

  In each of the above embodiments, the first plate 41, the second plate 42, the end plate 43, and the fins 44 are joined by brazing, but they may be joined by an adhesive.

  In each of the above embodiments, the first plate 41 and the second plate 42 are made of aluminum alloy, but they may be made of resin.

  In the above embodiments, the opening area of the air inlet 51 of the first passage 5 and the opening area of the air inlet 61 of the second passage 6 may be equal or different.

  In each said embodiment, the shape of the fin 44 of the 1st channel | path 5 and the shape of the fin 44 of the 2nd channel | path 6 may be equal, and may differ.

It is a perspective view showing typically the state where the heat exchanger concerning a 1st embodiment of the present invention was equipped in the case. It is a perspective view of the housing | casing of FIG. It is the figure which looked at the heat exchanger mounting part of FIG. 1 from the A direction. It is sectional drawing of the site | part of the 1st plate in the heat exchanger mounting part of FIG. It is sectional drawing of the site | part of the 2nd plate in the heat exchanger mounting part of FIG. It is a typical perspective view of the heat exchanger of FIG. It is a disassembled perspective view of the heat exchanger of FIG. It is a perspective view of the 1st plate in the heat exchanger of FIG. It is a figure which shows the structure of the 1st plate in the heat exchanger of FIG. It is a front view of the edge part plate in the heat exchanger of FIG. It is a figure which shows the structure of the fin in the heat exchanger of FIG. It is a perspective view of the plate in the heat exchanger which concerns on 2nd Embodiment of this invention. It is a perspective view of the conventional heat exchanger. It is a disassembled perspective view which shows the conventional heat exchanger and its attaching part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Housing | casing, 2 ... Internal space (1st space), 3 ... External space (2nd space), 7 ... Seal member, 11 ... Mounting plate part, 12 ... Opening part, 41 ... 1st plate, 42 ... 1st 2 plates, 411, first side plate portion, 412, first partition plate portion, 413, first seal plate portion, 421, second side plate portion, 422, second partition plate portion, 423, second seal plate portion.

Claims (5)

In the opening (12) formed in the mounting plate (11) of the housing (1) that partitions the first space (2) and the second space (3), the first space (2) and the second space are formed. A heat exchanger mounted so as to partition the space (3) and exchanging heat between the air in the first space (2) and the air in the second space (3),
A first plate (41) and a second plate (42) stacked alternately,
The first plate (41)
A first side plate portion (411) extending perpendicularly to the plate stacking direction and extending into the first space (2) and the second space (3);
A first partition plate (412) extending in the plate stacking direction from an edge in the first space (2) of the first side plate (411);
The opening of the mounting plate portion (11) extends from both ends of the first partition plate portion (412) in parallel with the mounting plate portion (11) and toward the outside of the first side plate portion (411). A first seal plate part (413) to be attached to a part around the part (12) ,
The second plate (42)
A second side plate portion (421) extending perpendicularly to the plate stacking direction and extending into the first space (2) and the second space (3);
A second partition plate (422) extending in the plate stacking direction from an edge in the second space (3) of the second side plate (421);
The second partition plate portion (422) extends from both ends of the second partition plate portion (422) in parallel with the mounting plate portion (11) and toward the outside of the second side plate portion (421), and the first plate (41) and the second plate. disposed so as to overlap the plate the first seal plate as viewed in the stacking direction (42) (413), said mounting plate portion (11), Ru is mounted at a site the periphery of the opening (12) A second seal plate portion (423),
The first side plate portion (411), the second side plate portion (421), and the second partition plate portion (422) form a first passage (5) through which air in the first space (2) flows. ,
The first side plate portion (411), the second side plate portion (421), and the first partition plate portion (412) form a second passage (6) through which air in the second space (3) flows. ,
The first seal plate portion (413) and the second seal plate portion (423) are attached to the mounting plate portion (11) with a seal member (7) interposed between the mounting plate portion (11). A heat exchanger characterized by that. The first plate (41) includes a first joining plate portion (414) extending in a direction perpendicular to the plate stacking direction from an end portion of the first partition plate portion (412) in the plate stacking direction, The second plate (42) includes a second bonding plate portion (424) extending in a direction orthogonal to the plate stacking direction from an end portion of the second partition plate portion (422) in the plate stacking direction, One joining plate part (414) is joined to the second side plate part (421), and the second joining plate part (424) is joined to the first side plate part (411). The heat exchanger according to 1. The heat exchanger according to claim 1 or 2 , wherein the first plate (41) and the second plate (42) have different shapes. Fins (44) that promote heat exchange are provided in the first passage (5) and are joined to the first plate (41) and the second plate (42). the when viewed in the direction of air flow, claims 1, characterized in that a part of said air inlet (51) and the fins of the first passage (5) (44) overlaps 3 The heat exchanger as described in any one of these. Fins (44) that promote heat exchange are provided in the second passage (6) and are joined to the first plate (41) and the second plate (42). the when viewed in the direction of air flow, we claim 1, characterized in that a part of the second air inlet passage (6) (61) and the fins (44) are overlapped 4 The heat exchanger as described in any one of these.

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