JP2000154978A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger that easily manufactures a structure body for forming a passage for alternatively composing high- and low- temperature fluid passages, and suppresses costs. SOLUTION: In a structure body 3 for forming a passage, a plurality of metal plates 4 where both the ends are bent at right angle and the section is formed nearly in a Z shape are laminated for brazing, thus suppressing the costs of facilities as compared with when one continuous plate is folded zigzag, and hence achieving an inexpensive heat exchanger. Also, by changing the size of the metal plate 4, the size of the structure body 3 for forming the passage can be changed easily. Furthermore, a bending margin 4A being bent at right angle is brazed to the bending margin 4A of the adjacent metal plate 4, thus increasing the sealing property of a fluid passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for performing heat exchange by flowing a high-temperature fluid and a low-temperature fluid adjacent to each other.

[0002]

BACKGROUND OF THE INVENTION The present inventors have devised a heat exchanger shown in the schematic diagram of FIG. 2 (not a known technique) as a heat exchanger for exchanging heat between a high-temperature fluid and a low-temperature fluid. In this heat exchanger, a plurality of high-temperature fluid passages A and a plurality of low-temperature fluid passages B are alternately arranged to exchange heat between a high-temperature fluid and a low-temperature fluid via a partition 1. As shown in FIG. 6-a, a high-temperature air flow and a low-temperature air flow flow orthogonally to perform a heat exchange with a cross-flow heat exchanger, and as shown in FIG. As opposed to a counter-flow heat exchanger that performs heat exchange by flowing in opposition to each other) and achieves a low pressure loss and high heat exchange efficiency.

[0003]

As described above, the heat exchanger devised by the inventors of the present invention has a plurality of high-temperature fluid passages A and a plurality of low-temperature fluid passages B arranged alternately to form a high-temperature fluid and a low-temperature fluid passage. A structure in which heat is exchanged with the fluid via the partition wall 1 is adopted.
For this reason, it is conceivable to manufacture a heat exchanger using a plate J1 (structure for forming a passage) folded in a square wave shape as shown in FIG. 7A. However, it is necessary to use a large and special machine tool to square a continuous plate. For this reason, the equipment cost increases, and as a result, the cost of the heat exchanger increases.
Further, even if a large and special machine tool is introduced, it is difficult to change the size of the zigzag plate J1 in the H direction (see FIG. 7).

On the other hand, as shown in FIG. 7 (b), a method of using a plurality of metal plates J2 and caulking the end of each metal plate J2 to an adjacent metal plate J2 is considered. However, the caulking method has difficulty in sealing the caulked portion J3 and is difficult to put into practical use.

[0005]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above-mentioned circumstances, and it has been made easy to manufacture a passage-forming structure which alternately comprises a high-temperature fluid passage and a low-temperature fluid passage, thereby reducing the cost. In the provision of exchangers.

[0006]

[Means for Solving the Problems] [Claim 1] A passage-forming structure constituting a high-temperature fluid passage and a low-temperature fluid passage alternately arranged includes a plurality of metal plates whose both ends are bent substantially vertically. Is manufactured by bonding. For this reason, as compared with the case where one continuous plate is folded, the cost of equipment can be reduced, and as a result, the cost of the heat exchanger can be reduced. Further, by changing the size of the metal plate, the size of the passage forming structure can be easily changed. Further, since the bent portion bent at a substantially right angle is joined to the adjacent metal plate, each fluid passage can ensure high sealing performance.

[0007] In addition to the above-mentioned means, the arrangement of the caps at the respective fluid inlets and outlets of the passage-forming structure prevents the entry of the low-temperature fluid into the respective high-temperature fluid passages. It is possible to prevent the high-temperature fluid from entering each low-temperature fluid passage. In addition, since the caps are provided at the ends on the fluid inlet / outlet side, the length of the fluid passage involved in heat exchange can be increased, and the heat exchange efficiency of the heat exchanger can be increased. Further, by arranging the caps in a staggered manner, sealing of the high-temperature fluid and the low-temperature fluid at the entrance and exit of the heat exchanger can be performed by one line.

[Means of Claim 3] In addition to the means of Claim 2, since the caps are arranged in an overlapping manner,
The seal width between the high-temperature fluid and the low-temperature fluid at the entrance and exit of the heat exchanger is increased, and the sealing performance at the entrance and exit of the heat exchanger can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described using a plurality of examples. FIGS. 1 and 2 show a first embodiment. FIG. 1 is an explanatory view of assembling a structure for forming a passage, and FIG. 2 is a high-temperature fluid passage through which a high-temperature fluid flows and a low-temperature fluid. FIG. 4 is a schematic view of a low-temperature fluid passage through which the fluid flows.

The heat exchanger is formed of a metal material having excellent thermal conductivity, such as aluminum or brass, and has a high-temperature fluid passage A through which a high-temperature fluid (a high-temperature gas flow, for example, high-temperature air circulating in an enclosed space) flows. A plurality of low-temperature fluid passages B (see FIG. 2 b) through which a low-temperature fluid (low-temperature gas flow, for example, outdoor air) flows (see FIG. 2 a) are alternately arranged via a rectangular partition wall 1. Things. Specifically, each high-temperature fluid passage A and each low-temperature fluid passage B are shown in FIG.
As shown in (b), it is provided in a cubic box shape that is long in the vertical direction.

The fins 2 are arranged to be inclined with respect to the depth direction of the high and low temperature fluid passages A and B. Specifically, the fin 2 is a thin plate having a fin length (width through which the fluid passes) smaller than the high-temperature and low-temperature fluid passages A and B, and is disposed in a substantially diagonal direction of the high-temperature and low-temperature fluid passages A and B having a rectangular shape. As shown in FIG. 2, the fluid passages A and B are inclined in the same direction with respect to the longitudinal direction (vertical direction) of the high-temperature and low-temperature fluid passages A and B. The fins 2 are provided with a large number of louvers 2A orthogonal to the flow direction of the fluid to improve the heat exchange efficiency.

As described above, the heat exchanger has the high-temperature fluid passages A and the low-temperature fluid passages B arranged alternately.
High temperature fluid passage A and low temperature fluid passage B alternately arranged
Is manufactured using the passage-forming structure 3 that constitutes the above. As shown in FIG. 1, the passage forming structure 3 is formed by laminating a plurality of metal plates 4 having both ends bent at substantially right angles and having a substantially Z-shaped cross section with fins 2 interposed therebetween. The bend 4A of each metal plate 4 is brazed to the bend 4A of the adjacent metal plate 4. The brazing is performed integrally with other members such as the fins 2.

(Operation of the First Embodiment) When a high-temperature fluid flows through the high-temperature fluid passage A and a low-temperature fluid flows through the low-temperature fluid passage B,
When the high-temperature fluid and the low-temperature fluid pass through the fins 2, the high-temperature fluids and the low-temperature fluids are opposed to each other, and exchange heat through the fins 2 and the partition walls 1.

(Effect of the First Embodiment) Since the passage forming structure 3 of the present embodiment is manufactured by joining a plurality of metal plates 4 as described above, a continuous single plate is folded. As compared with the case, the equipment cost can be reduced, and as a result, the cost of the heat exchanger can be reduced. In addition, by changing the size of the metal plate 4, the size of the passage forming structure 3 can be easily changed. Further, since the bent portion 4A bent at a substantially right angle is brazed to the bent portion 4A of the adjacent metal plate 4, fluid leakage in the high-temperature and low-temperature fluid passages A and B can be eliminated.

(Modification of First Embodiment) The structure 3 for forming a passage in the above embodiment is an example in which a plurality of metal plates 4 each having a substantially Z-shaped cross section are laminated and manufactured. As shown in FIG. 3A, the passage forming structure 3 may be manufactured by laminating a plurality of metal plates 4 each having a substantially U-shaped cross section whose both ends are bent inward by 90 °, or as shown in FIG. As shown, the passage forming structure 3 may be manufactured by laminating a plurality of metal plates 4 each having a substantially C-shaped cross section whose both ends are bent outward by 90 °.

(Second Embodiment) FIG. 4 is a perspective view showing a fluid port in a passage forming structure. In the heat exchanger of this embodiment, as shown in FIG. 4, the inlet and outlet of the high-temperature fluid passage A and the inlet and outlet of the low-temperature fluid passage B are arranged in a staggered manner. Therefore, the caps 5 that prevent the low-temperature fluid from entering the high-temperature fluid passages A and prevent the high-temperature fluid from entering the low-temperature fluid passages B are staggered at the ends of the passage-forming structures 3. Are located. This cap 5
Is a press-formed metal piece, which is integrally brazed together with other heat exchanger members.

As described above, since the cap 5 is provided at the end of each fluid inlet / outlet side, the high-temperature fluid passage A and the low-temperature fluid passage B involved in heat exchange can be made long, and the heat exchange efficiency of the heat exchanger can be reduced. Can be enhanced. Further, by disposing the caps 5 in a staggered manner, the sealing of the high-temperature fluid and the low-temperature fluid at the entrance and exit of the heat exchanger can be performed by one line.

(Third Embodiment) FIG. 5 is a perspective view showing a fluid port in a passage forming structure. This example is
As shown in FIG. 5, the caps 5 arranged in a staggered manner at the respective fluid ports are arranged so as to overlap with the adjacent caps 5 on the seal line.
As described above, since the caps 5 are arranged so as to overlap with each other, the seal width between the high-temperature fluid and the low-temperature fluid at the entrance and exit of the heat exchanger is widened, and the sealing performance at the entrance and exit of the heat exchanger can be improved.

(Modification) In the above embodiment, brazing was used as an example of joining metal plates 4 and joining caps. However, joining means other than brazing, such as adhesion and welding, are used. Is also good.

[Brief description of the drawings]

FIG. 1 is an explanatory view for assembling a passage forming structure (first embodiment)
Example).

FIG. 2 is a schematic perspective view showing a high-temperature and low-temperature fluid passage (first embodiment).

FIG. 3 is an explanatory view for assembling a passage forming structure (first example)
Modification of the embodiment).

FIG. 4 is a perspective view showing a fluid port in a passage forming structure (second embodiment).

FIG. 5 is a perspective view showing a fluid port in a passage forming structure (third embodiment).

FIG. 6 is a perspective view of a main part of the heat exchanger.

FIG. 7 is an explanatory view showing a production example of a passage forming structure.

[Explanation of symbols]

 A high-temperature fluid passage B low-temperature fluid passage 1 partition 2 fin 3 passage forming structure 4 metal plate 4A bending allowance 5 cap

Continuing from the front page (72) Inventor Hajime Sugito 1-1-1, Showa-cho, Kariya-shi, Aichi, Japan Denso Co., Ltd. ) Inventor Koji Kinoshita 1-1-1, Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (reference) 3L103 AA01 AA11 AA13 AA50 BB38 BB39 CC22 DD32 DD33 DD98

Claims (3)

[Claims] A plurality of high-temperature fluid passages through which a high-temperature fluid flows and a plurality of low-temperature fluid passages through which a low-temperature fluid flows are arranged alternately, and the fluid flows through a partition between the high-temperature fluid passage and the low-temperature fluid passage. In a heat exchanger that performs heat exchange, a plurality of metal plates having both ends bent at substantially right angles are used for the passage forming structure that constitutes the high-temperature fluid passage and the low-temperature fluid passage that are alternately arranged. A heat exchanger, wherein a bending margin of each metal plate is provided so as to be joined to an adjacent metal plate. 2. A plurality of high-temperature fluid passages through which a high-temperature fluid flows and a plurality of low-temperature fluid passages through which a low-temperature fluid flows are arranged alternately, and fluid flows through a partition between the high-temperature fluid passage and the low-temperature fluid passage. In a heat exchanger that performs heat exchange, a plurality of metal plates having both ends bent at substantially right angles are used for the passage forming structure that constitutes the high-temperature fluid passage and the low-temperature fluid passage that are alternately arranged. The bend of each metal plate is provided so as to be joined to an adjacent metal plate, and the end of each of the passage forming structures on the fluid inlet / outlet side is adapted to prevent entry of a low-temperature fluid into each of the high-temperature fluid passages. A heat exchanger characterized in that caps for preventing the high-temperature fluid from entering each low-temperature fluid passage are alternately arranged in a staggered manner. 3. A plurality of high-temperature fluid passages through which a high-temperature fluid flows and a plurality of low-temperature fluid passages through which a low-temperature fluid flows are arranged alternately, and fluid flows through a partition between the high-temperature fluid passage and the low-temperature fluid passage. A heat exchanger for performing heat exchange, wherein the passage forming structure that forms the high-temperature fluid passage and the low-temperature fluid passage that are alternately arranged includes a passage that alternately arranges the high-temperature fluid passage and the low-temperature fluid passage. A plurality of metal plates, both ends of which are bent at substantially right angles, are used as the formation structure, and the bending margin of each metal plate is provided by being joined to an adjacent metal plate, and each fluid of the passage formation structure is provided. At the end on the entrance / exit side, caps that prevent the entry of the low-temperature fluid into each high-temperature fluid passage and the entry of the high-temperature fluid into each low-temperature fluid passage are alternately arranged in a zigzag pattern. Cap and over Heat exchanger, characterized in that disposed wraps.