JP4284727B2 - Heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchanger that performs 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 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 the high-temperature fluid and the low-temperature fluid via the partition wall 1. As shown in FIG. 6-a, a high-temperature air flow and a low-temperature air flow cross at right angles to perform heat exchange. Compared with a counter-flow heat exchanger that exchanges heat by facing each other, a low pressure loss and high heat exchange efficiency are realized.
[0003]
[Problems to be solved by the invention]
As described above, the heat exchanger devised by the present inventors arranges a plurality of high-temperature fluid passages A and a plurality of low-temperature fluid passages B alternately, and heats the high-temperature fluid and the low-temperature fluid via the partition wall 1. Adopt a structure to replace. For this reason, it is conceivable to manufacture a heat exchanger using a plate J1 (passage forming structure) that is folded in a square wave shape as shown in FIG.
However, large and special machine tools are required to fold a single continuous plate. For this reason, equipment cost will become large and the cost of a heat exchanger will become high as a result. Even if a large and special machine tool is introduced, there is a problem that it is difficult to change the size of the zigzag folding plate J1 in the H direction (see FIG. 7).
[0004]
On the other hand, as shown in FIG. 7B, there can be considered a means of using a plurality of metal plates J2 and caulking and joining the ends of each metal plate J2 to the adjacent metal plate J2.
However, the caulking method has difficulty in practical use due to the difficulty in sealing the caulking portion J3.
[0005]
OBJECT OF THE INVENTION
The present invention has been made based on the above circumstances, and provides a heat exchanger that easily manufactures a passage-forming structure in which high-temperature fluid passages and low-temperature fluid passages are alternately configured, and suppresses costs. is there.
[0006]
[Means for Solving the Problems]
[Means of Claim 1]
The structure for forming a passage constituting the high-temperature fluid passage and the low-temperature fluid passage that are alternately arranged is manufactured by joining a plurality of metal plates bent at both ends substantially vertically. For this reason, compared with the case where one continuous plate is folded in a zigzag manner, the equipment cost can be reduced, and as a result, the cost of the heat exchanger can be reduced.
Moreover, the size of the passage forming structure can be easily changed by changing the size of the metal plate.
Furthermore, since the bending margin bent substantially at right angles is joined to the adjacent metal plate, each fluid passage is ensured to have high sealing performance.
[0007]
[Means of claim 2]
In addition to the means of claim 1, the caps are arranged in a staggered manner at each fluid inlet / outlet of the passage forming structure, thereby preventing the intrusion of the low temperature fluid into each high temperature fluid passage and the high temperature into each low temperature fluid passage. Intrusion of fluid can be prevented.
Moreover, since the cap is provided at each fluid inlet / outlet side end, 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. Furthermore, the caps are arranged in a staggered manner, so that the high temperature fluid and the low temperature fluid can be sealed in one line at the entrance and exit of the heat exchanger.
[0008]
[Means of claim 3]
In addition to the means of the second aspect, since the caps 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.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment modes of the present invention will be described using a plurality of examples.
(Configuration of the first embodiment)
FIG. 1 and FIG. 2 show a first embodiment, FIG. 1 is an explanatory diagram of assembly of a passage forming structure, and FIG. 2 is a schematic view of a high-temperature fluid passage through which a high-temperature fluid flows and a low-temperature fluid passage through which a low-temperature fluid flows. It is.
[0010]
The heat exchanger is formed of a metal material having excellent thermal conductivity such as aluminum or brass, and a high-temperature fluid passage A (FIG. 2) through which a high-temperature fluid (a high-temperature gas flow, for example, high-temperature air circulating in a sealed space) flows. A) and low-temperature fluid passages B (see b in FIG. 2) through which low-temperature fluid (low-temperature gas flow, for example, outdoor air) flows are alternately arranged via rectangular partition walls 1. .
Specifically, each high-temperature fluid passage A and each low-temperature fluid passage B are provided in a cubic box shape that is long in the vertical direction, as shown in FIGS.
[0011]
The fins 2 are inclined with respect to the depth direction of the high temperature and low temperature fluid passages A and B. Specifically, the fin 2 is a thin plate whose fin length (width through which the fluid passes) is narrower than that of the high-temperature and low-temperature fluid passages A and B, and is arranged in a substantially diagonal direction of the rectangular shape of the high-temperature and low-temperature fluid passages A and B. As shown in FIG. 2, they are arranged in a state of being inclined forward 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 fluid flow direction to improve heat exchange efficiency.
[0012]
As described above, the heat exchanger is configured such that the high temperature fluid passages A and the low temperature fluid passages B are alternately arranged, and the high temperature fluid passages A and the low temperature fluid passages B are alternately arranged. It is manufactured using the body 3.
As shown in FIG. 1, the structure 3 for forming a passage is formed by laminating a plurality of metal plates 4 with both ends bent at substantially right angles and having a substantially Z-shaped cross section with fins 2 interposed therebetween. Thus, the bending margin 4A of each metal plate 4 is brazed and joined to the bending margin 4A of the adjacent metal plate 4. This brazing is integrally performed with other members such as the fins 2.
[0013]
(Operation of the first embodiment)
When the high-temperature fluid flows in the high-temperature fluid passage A and the low-temperature fluid flows in the low-temperature fluid passage B, the high-temperature fluid and the low-temperature fluid are opposed to each other when passing through the fins 2, and pass through the fins 2 and the partition walls 1. Perform heat exchange.
[0014]
(Effects of the first embodiment)
Since the passage-forming structure 3 according to the present embodiment is manufactured by joining a plurality of metal plates 4 as described above, the facility cost can be reduced as compared with a case where a single continuous plate is folded. As a result, the cost of the heat exchanger can be reduced.
Further, by changing the size of the metal plate 4, the size of the passage forming structure 3 can be easily changed.
Furthermore, since the bending allowance 4A bent at a substantially right angle is brazed to the bending allowance 4A of the adjacent metal plate 4, fluid seal leakage in each of the high temperature and low temperature fluid passages A and B can be eliminated.
[0015]
(Modification of the first embodiment)
The passage-forming structure 3 in the above embodiment is an example in which a plurality of metal plates 4 having a substantially Z-shaped cross section are laminated, and as shown in FIG. 3 , both ends are bent 90 ° outward. The passage-forming structure 3 may be manufactured by laminating a plurality of metal plates 4 having a substantially C-shaped cross section.
[0016]
(Second embodiment)
FIG. 4 is a perspective view showing a fluid inlet / outlet in the passage forming structure.
In the heat exchanger of this embodiment, as shown in FIG. 4, the inlet / outlet of the high temperature fluid passage A and the inlet / outlet of the low temperature fluid passage B are arranged in a staggered manner. For this reason, the caps 5 that prevent the intrusion of the low temperature fluid into each of the high temperature fluid passages A and prevent the intrusion of the high temperature fluid into each of the low temperature fluid passages B are staggered at the end of the passage forming structure 3. Has been placed. The cap 5 is a press-molded metal piece and is integrally brazed together with other heat exchanger members.
[0017]
Thus, 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 that are involved in heat exchange can be taken longer, and the heat exchange efficiency of the heat exchanger can be improved. it can.
Further, the caps 5 are arranged in a staggered manner, whereby the high temperature fluid and the low temperature fluid at the entrance and exit of the heat exchanger can be sealed in one line.
[0018]
(Third embodiment)
FIG. 5 is a perspective view showing a fluid inlet / outlet in the passage forming structure.
In this embodiment, as shown in FIG. 5, each cap 5 arranged in a staggered manner at each fluid inlet / outlet is arranged so as to overlap with an adjacent cap 5 on a seal line.
Thus, since each cap 5 is arrange | positioned overlappingly, the seal width of the hot fluid and cold fluid in the entrance / exit of a heat exchanger spreads, and the sealing performance in the entrance / exit of a heat exchanger can be improved.
[0019]
(Modification)
In the above embodiment, brazing is shown as an example of joining between the metal plates 4 and cap joining, but joining means other than brazing, such as adhesion or welding, may be used.
[Brief description of the drawings]
FIG. 1 is an explanatory view of assembly of a structure for forming a passage (first embodiment).
FIG. 2 is a schematic perspective view showing a high-temperature and low-temperature fluid passage (first embodiment).
FIG. 3 is an explanatory diagram of assembly of a passage forming structure (modified example of the first embodiment).
FIG. 4 is a perspective view showing a fluid inlet / outlet in a passage forming structure (second embodiment).
FIG. 5 is a perspective view showing a fluid inlet / outlet 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 manufacturing example of a passage forming structure.
[Explanation of symbols]
A High-temperature fluid passage B Low-temperature fluid passage 1 Partition 2 Fin 3 Structure for passage formation 4 Metal plate 4A Bend 5 Cap

Claims (3)

Heat in which a plurality of high-temperature fluid passages for flowing a high-temperature fluid and a plurality of low-temperature fluid passages for flowing a low-temperature fluid are alternately arranged so that the fluid exchanges heat through a partition wall between the high-temperature fluid passage and the low-temperature fluid passage. An exchanger,
A fin having a wave shape is arranged in the high temperature fluid passage and the low temperature fluid passage,
The passage-forming structures constituting the high-temperature fluid passages and the low-temperature fluid passages that are alternately arranged,
A plurality of metal plates provided at both ends with bending margins bent at substantially right angles to the wave height direction of the fins ;
The metal plate is oppositely bonded so that the bending allowance overlaps with the bending allowance of the adjacent metal plate,
A heat exchanger characterized in that the joined bending margin forms part of the high temperature fluid passage or the low temperature fluid passage. Heat in which a plurality of high-temperature fluid passages for flowing a high-temperature fluid and a plurality of low-temperature fluid passages for flowing a low-temperature fluid are alternately arranged so that the fluid exchanges heat through a partition wall between the high-temperature fluid passage and the low-temperature fluid passage. An exchanger,
A fin having a wave shape is arranged in the high temperature fluid passage and the low temperature fluid passage,
The passage-forming structures constituting the high-temperature fluid passages and the low-temperature fluid passages that are alternately arranged,
A plurality of metal plates provided at both ends with bending margins bent at substantially right angles to the wave height direction of the fins ;
The metal plate is oppositely bonded so that the bending allowance overlaps with the bending allowance of the adjacent metal plate,
The joined curvature forms part of the hot fluid passage or the cold fluid passage;
At the end on each fluid inlet / outlet side of the passage forming structure,
A heat exchanger characterized in that caps that prevent the entry of a low-temperature fluid into each high-temperature fluid passage and alternately prevent the high-temperature fluid from entering each low-temperature fluid passage are alternately arranged in a staggered manner. Heat in which a plurality of high-temperature fluid passages for flowing a high-temperature fluid and a plurality of low-temperature fluid passages for flowing a low-temperature fluid are alternately arranged so that the fluid exchanges heat through a partition wall between the high-temperature fluid passage and the low-temperature fluid passage. An exchanger,
A fin having a wave shape is arranged in the high temperature fluid passage and the low temperature fluid passage,
The passage-forming structures constituting the high-temperature fluid passages and the low-temperature fluid passages that are alternately arranged,
A plurality of metal plates provided at both ends with bending margins bent at substantially right angles to the wave height direction of the fins ;
The metal plate is oppositely bonded so that the bending allowance overlaps with the bending allowance of the adjacent metal plate,
The joined curvature forms part of the hot fluid passage or the cold fluid passage;
At the end on each fluid inlet / outlet side of the passage forming structure,
Caps that prevent the penetration of the cold fluid into each hot fluid passage and also prevent the hot fluid from entering the cold fluid passage are alternately staggered,
Each of the caps is arranged in such a manner as to be vertically overlapped with an adjacent cap and a laminated service of the high-temperature fluid passage and the all-defined temperature fluid passage at each fluid inlet / outlet.

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