JPH0639252Y2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to a heat exchanger suitable as an oil cooler and an evaporator, and more specifically, an inner plate and an outer plate are laminated via fins to perform heat exchange. The present invention relates to a heat exchanger configured so that the two fluids flow in the interior so as to be substantially orthogonal to each other.

"Prior Art" A laminated heat exchanger composed of an inner plate and an outer plate is disclosed, for example, in Japanese Utility Model Publication No. 63-173685.
No. 62-52787 and the like.

The former heat exchanger described in Japanese Utility Model Laid-Open No. 63-173685 is composed of a plurality of inner plates 2, 2 as shown in FIGS. 7, 8 and 9. The heat exchange core portion 1 and the first and second outer plates 20 and 21 arranged so as to cover both side surfaces thereof are roughly configured.

The inner plates 2, 2 have a substantially rectangular shape in a plan view, and bulging portions 3 projecting in one direction are provided near both ends thereof.
Is formed, and a through hole 4 is formed in the center of the bulging portion. Therefore, when these bulging portions are laminated so as to be in contact with each other, these bulging portions act as a kind of spacer, and the through holes 4 and 4 communicate with each other to form the header portion 5. Become. That is, the inner plate 2,
The corrugated fins 2 and are arranged so that the top surfaces of the bulging portions 3 and 3 or the top portions are in contact with each other, and the first flow paths 6 and 6 parallel to the paper surface are secured between them. 7 and 7 and corrugated fins 9 and 9 for securing the second flow paths 8 and 8 in the direction perpendicular to the plane of the drawing, respectively, and these are integrally joined by the flange portion 10. The heat exchange core part 1 is formed.

The first and second second outer plates 20 and 21 are arranged so as to close the upper and lower surfaces in the figure of the heat exchange core portion 1 configured as described above, and the heat exchange core is on that surface. A plurality of beads 22 protruding toward the side are formed in the longitudinal direction. Pipe fittings 23, (23) are attached to the first outer plate 20 at positions corresponding to the bulging portions 3 of the upper inner plate 2.

The inner plates 2 and 2 described above and the outer plate
20, 21 and corrugated fins 7, 8 etc. are made of aluminum or its alloy, are laminated as shown in FIG. 7, and are, for example, flange portions in an inert gas atmosphere.
10 and 24 are integrated by welding or the like to form a heat exchanger.

Therefore, when a first fluid, for example, oil is supplied from one pipe connector (not shown), the oil flows from the header portion 5 through the first flow paths 6 and 6 to the other header portion, and then the other pipe connecting portion. Go out of the tool 23. If a second fluid, for example, air, is flown between the second flow paths 8, 8 perpendicular to the paper surface during that time, heat exchange is performed between these two fluids.

[Problems to be Solved by the Invention] In the above conventional heat exchanger, since the auxiliary flow paths 11 and 11 through which the first fluid flows are provided inside the outer plates 20 and 21, heat exchange efficiency is improved. Although it has the advantage of being high, it also has problems. That is, since the inner plates 2, 2 are pushed from both sides by the corrugated fins 7 and 8, there is no particular problem in terms of strength, but one side of the outer plates 20 and 21 faces the atmosphere. Therefore, when the fluid pressure increases, there is a risk of deformation toward the atmosphere. However, the 7th
In the heat exchanger shown in FIG. 9, the beads 22 are formed on the outer plate, so that the pressure resistance is relatively large.

As described above, the conventional laminated heat exchanger has a problem in strength. Therefore, the outer plate is made thicker to cope with the problem, but when the wall pressure is increased, the weight is increased and the material cost is increased. Is higher and costs more.

Therefore, a heat exchanger having an improved pressure resistance without increasing the wall thickness has been proposed by the above-mentioned Japanese Utility Model Laid-Open No. 62-52787. The outer plate of this heat exchanger is provided with a bowl-shaped protrusion for reinforcement at a position corresponding to the header. Therefore, even if the internal pressure is high, some deformation can be prevented. However, when the heat exchanger becomes large and the diameter of the bowl-shaped protrusion becomes large, the reinforcing effect becomes small. In addition, since the fins are also provided inside the outer plate or the side plate to form the auxiliary fluid flow path, the heat exchange efficiency is high, but the fin of the heat exchange core part and this auxiliary fluid flow path are The side plate needs to be specially processed in order to share the fin for forming it or to secure the same flow passage area, which causes another problem that the cost is increased.

Therefore, it is an object of the present invention to provide a heat exchanger that is not deformed by a large internal pressure, has high heat exchange efficiency, is lightweight, and is inexpensive.

[Means for Solving the Problems] In the present invention, a plurality of ribs are formed on the outer plate in the longitudinal direction in order to achieve the above object, and these ribs extend to the bulging portion. Composed. That is, according to the present invention, a plurality of inner plates having a substantially rectangular shape in plan view and bulging portions bulging to one side are formed at both ends in the longitudinal direction thereof to form a header portion at the time of completion of assembly. And, when assembled together with the inner plate, the whole of which has the same rectangular shape as the inner plate,
The inner plate comprises a pair of outer plates to which a pipe connector for supplying and discharging one fluid that is heat-exchanged is attached to a position facing the bulging portion of the inner plate. A heat exchanger in which inner plates are stacked via fins and arranged so as to close both side surfaces of a heat exchange core portion in which flow paths of two fluids to be heat-exchanged are formed, respectively. In the longitudinal direction of the plate, a plurality of convex ribs protruding toward the heat exchange core portion side are formed at predetermined intervals and correspond to the bulging portion of the inner plate at the end thereof. Bowl-shaped portions protruding in the same direction as the ribs are formed at the positions, at least some of these ribs extend to the bowl-shaped portions, and the tops of these ribs are the same as the inner portion. Auxiliary fluid passage is formed between the inner plate is bonded to the plate.

[Operation] Since the present invention is configured as described above, when a first fluid, for example, oil is supplied from one of the pipe connectors, the oil flows through the inner plate at the header portion of the inner plate. It is distributed to the road and flows to the other header. At this time, the oil also flows in the auxiliary fluid passage formed by the rib of the outer plate. Then it goes out from the other pipe connector. In the meantime, if a second fluid, for example, air, is made to flow through the flow path that is also formed by the inner plate,
Heat will be exchanged between these two fluids.

As described above, according to the present invention, a plurality of ribs are formed on the outer plate, and these ribs reach the bowl-shaped portion. Therefore, the coefficient of the cross section of the bowl-shaped portion of the outer plate is improved. At the same time, since the rib is joined to the inner plate, even if the wall thickness is thin, it will not be deformed by the internal pressure. In addition, since the auxiliary fluid path is formed inside the outer plate by a plurality of convex ribs,
Heat exchange efficiency is high.

[Examples] Examples 1 to 6 in which the present invention is carried out in a laminated heat exchanger will be described below.
As will be described with reference to the drawings, in the illustrated embodiment, the fins are shown as being implemented by corrugated fins, and the pipe connector for supplying and discharging fluid is shown as being attached to one outer plate.

However, fins of other constructions can also be implemented, and the pipe fittings can also be mounted on both outer plates oppositely. Although four ribs are shown on the outer plate, it is clear that the number of ribs is not limited to these, and that the ribs can be formed by meandering ribs. However, these are not explained one by one.

Now, referring to FIG. 1, it is understood that the heat exchange core portion of this embodiment is also configured in the same manner as the conventional one shown in FIG. Therefore, the constituent elements of the heat exchange core portion are given the same reference numerals to avoid redundant description.

The outer plate that closes both upper and lower surfaces of the heat exchange core portion is composed of a pair of a first outer plate 30 to which a pipe connector is attached and a second outer plate 31 located on the lower side in the drawing.

As shown in FIGS. 2 to 5, the second outer plate 31 is formed of a light metal material such as aluminum so as to present a plate-like body having a substantially rectangular shape as a whole. The convex ribs 33 to 36 for reinforcing and forming fluid paths, which protrude toward the heat exchange core portion when they are joined to No. 1, are integrally formed by pressing or the like. Further, at both ends in the longitudinal direction, a bowl-shaped portion 37 is formed which protrudes in the same direction as the rib and comes into contact with the inner surfaces of the bulging portions 3 of the inner plates 2 and 2 located outside when joined to the heat exchange core portion. Has been done.

Four ribs 33 to 36 are formed in the central portion of the second outer plate in the example shown in FIGS.
As shown in FIGS. 2 and 5, there are two end portions on both sides, and the two ribs 34 and 35 reach the bowl-shaped portion 37.
That is, it is also formed in the bowl-shaped portion.

The first outer plate 30 is also constructed in the same manner as the second outer plate as a whole, but in this embodiment, as shown in FIG. 1, a position corresponding to the bulging portion 3 of the inner plates 2 and 2 is formed. A pipe connector 38 is attached to the pipe connector 38, and a plurality of ribs 33 formed in the longitudinal direction end before the pipe connector 38. Then, in order to reinforce the vicinity of the pipe connector 38, the pipe connecting portion is sandwiched, and another short reinforcing rib 3 is provided.
3'and 36 'are provided.

The first and second outer plates 30 and 31 formed as described above have the flange portion 39, and thus the heat exchange core portion 1
The ribs 33 to 36 are joined at their tops or joining surfaces to the inner plate 2 by collective brazing such as vacuum brazing as shown in FIG.

Therefore, inside the first and second outer plates 30 and 31, a plurality of auxiliary fluid passages 40 partitioned by the ribs are formed in the longitudinal direction between the first and second outer plates 30 and 31. The auxiliary fluid passages 40, 40 inside the first outer plate 30 end before the pipe connecting portion,
The auxiliary fluid passage of the second outer plate 31 reaches the bowl-shaped portion 37.

Since the heat exchanger according to the present embodiment is configured as described above, when the first fluid, for example, the refrigerant is supplied to the header portion from the pipe connector 38 on the left side in FIG.
It flows through the flow paths 6 and 6 and the auxiliary fluid paths 40 and 40 to reach the header section 5 on the right side and exits from the pipe connector 38 corresponding to this header section. At this time, heat is exchanged between the refrigerant and the air when, for example, air is caused to flow through the second flow paths 8, 8 that are perpendicular to the paper surface in which the corrugated fins 9, 9, are interposed.

According to the present embodiment, since the rib and the bowl-shaped portion 37 are provided, the pressure resistance is large, whereas the conventional one without the rib and the bowl-shaped portion is deformed at 10 kg / cm ² , it is 20 kg / cm. ^No deformation was observed even when pressurized to ² .

"Effect of the invention" As described above, according to the present invention, the outer plate is
Since a plurality of ribs are formed and these ribs extend to the bowl-shaped portion, the outer plate has a large pressure resistance and is not deformed by a large internal pressure. Moreover, since the auxiliary fluid passage is formed inside the outer plate by the convex rib, the fluid also flows into this fluid passage, and the heat exchange efficiency is high. As described above, according to the present invention, since the outer plate has high pressure resistance, the wall thickness can be made thin, and an inexpensive and lightweight heat exchanger can be provided.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a sectional view showing a part of the invention, and FIG. 2 is a plan view showing an embodiment of an outer plate, 3, 4, 5 The drawing is a cross-sectional view taken along arrows AA, BB, and CC in FIG. 2, and FIG. 6 is a cross-sectional view taken along arrow D-D in FIG.
FIG. 9 is a partially cutaway view of a conventional example, FIG. 7 is a cross-sectional view thereof, and FIGS. 8 and 9 are plan views of the first and second outer plates, respectively. 1 ... Heat exchange core part, 2 ... Inner plate 3 ... Bulging part, 5 ... Header part 7, 9 ... Corrugated fin 30 ... First outer plate 31 ... Second outer plate 33 to 36 ... … Rib 37 …… Bowl-shaped part, 38 …… Pipe connector 40 …… Auxiliary fluid path

Claims (1)

[Scope of utility model registration request] 1. A plurality of inner plates, each of which has a substantially rectangular shape in plan view and has bulging portions bulging toward one side at both ends in the longitudinal direction thereof to form a header portion upon completion of assembly. When the pipe is assembled with the inner plate, the pipe connecting member for supplying and discharging one fluid that is heat-exchanged to a position facing the bulging portion of the inner plate is And a pair of outer plates attached to the outer plate, wherein the outer plates are laminated with the inner plates through fins to form flow paths through which two fluids to be heat-exchanged flow, respectively. A heat exchanger arranged so as to close both side surfaces of the heat exchanger core, wherein a heat exchanger core portion is provided at a predetermined interval in the longitudinal direction of the outer plate. A plurality of convex ribs protruding toward are formed, and a bowl-shaped portion protruding in the same direction as the ribs is formed at a position corresponding to the bulging portion of the inner plate at the end thereof, At least some of these ribs extend to the bowl-shaped portion, and the tops of these ribs are joined to the inner plate to form an auxiliary fluid path between them. A heat exchanger characterized by.