JPS61243287A - Heat exchanger - Google Patents

Abstract

PURPOSE:To permit to improve the heat transfer performance and compact heat exchanger by a method wherein arbitrary sheets of fin thin sheets are arranged between plate type tubes in substantially parallel with predetermined spaces and both of the members are connected by connecting members so as to transfer heat while the flow path of the other fluid is formed of the plate type tubes, the fin thin sheets and the connecting members. CONSTITUTION:The fin thin sheets 12 are located at both sides of the plate type tube 11 and connecting members 13 are provided between the tube 11 and the fin thin sheets 12 as well as between the fin thin sheets 12 while both members are connected so as to transfer heat. Fluid T flows through the plate type tube 11 and the other fluid U lows through spaces constituted of the tube 11, the thin sheets 12 and the connecting members 13 while heat exchange can be effected not only on the surfaces of the tube 11 but also on the surfaces of the fin thin sheets 12 bia the connecting members 13. The configuration of the connecting member 13 is simple, therefore, the accuracy thereof can be secured easily, the tube 11 and the thin sheets 12 are connected perfectly and the pitches between fin shin sheets can be uniformed, therefore, the size of the heat exchanger may be reduced easily without deteriorating the heat transfer performance of the heat exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchanger used in, for example, car coolers, room air conditioners, refrigerators, and the like.

2. Description of the Related Art A conventional heat exchanger of the type 7 (contact type) used in car coolers and the like has a structure as shown in FIG.

That is, bent fins 1 and tubes 2 are alternately combined, and their contact portions are fused and joined by brazing or the like. The heat exchange fluid has a structure in which one side flows inside the tube 2 and the other side flows through the space formed by the fins 1 and the tubes 2.

Problems to be Solved by the Invention However, with such a structure, not only the heat transfer performance is greatly reduced due to the dimensional accuracy of the fins 1, but also the pitch of the fins 1 cannot be made small. This is due to the following reasons.

In other words, since the fins 1 are formed by bending a thin plate, if the bending angle or the perpendicularity to the tube 2 is even slightly off, the height and pitch of the fins 1 may be greatly off. Furthermore, if the height of the fin 1 varies, a gap will be created between the fin 1 and the tube 2, resulting in a joint failure. This increases the thermal resistance between the fins 1 and the tubes 2. Furthermore, if the pitch of the fins 1 varies, the flow rate and heat transfer coefficient of fluid flowing between the fins will vary, resulting in a significant decrease in heat transfer performance. Furthermore, if we try to reduce the pitch of the fins 1, the above-mentioned problems will become even worse, and at the same time, we will be constrained by the limitations of bending and forming, and the heat exchanger will not be able to be made more compact by increasing the fin area per unit volume. There wasn't.

Means for Solving the Problems In order to solve the above problems, the heat exchanger of the present invention arranges an arbitrary number of thin fin plates between the plate-like tubes at intervals parallel to each other or substantially parallel to each other, and The plate-shaped tubes are thermally connected by a connecting material.

The flow path for the other fluid is formed by a thin fin plate and a connecting member.

Function: With this technical means, the heat conductive connection between the fin thin plate and the plate-like tube is performed by a connecting material, so it is possible to easily join the fin thin plate regardless of the processing precision of the fin thin plate, and the pitch of the fin thin plate can be adjusted. Since is determined only by the length of the connecting member, the pitch of the thin fin plates can be made uniform and easily small. Therefore, heat transfer performance is ensured, and the heat exchanger can be made more compact.

Example Next, various embodiments will be described.

[Embodiment 1] FIG. 1 shows the main parts of a heat exchanger according to an embodiment of the present invention. Three thin fin plates 12 are located on both sides of a plate tube 110 having a rectangular shape.

Connecting members 13 are located between the plate-shaped tube 11 and the thin fin plates 12 and between the thin fin plates 12, thereby thermally connecting the two. The contact portions of the plate tube 11, the thin fin plate 12, and the connecting member 13 are joined by brazing or the like. The fluid T flows within the plate-shaped tube 11, and the fluid U flows through the space formed by the plate-shaped tube 11°, the thin fin plate 12, and the connecting member 13. The connecting member 13 is arranged to be elongated and parallel to the flow direction of the fluid U in consideration of the flow resistance of the fluid U. Heat exchange between the two fluids takes place not only from the surface of the plate tube 110 but also from the surface of the thin fin plate 12 via the connecting member 13. Therefore, from the viewpoint of performance of the heat exchanger, it is necessary to completely join the plate-shaped chives 11 and the thin fin plates 12. The possibility of joining is determined by the connecting material 1 in terms of dimensions.
3 is determined only by the lateral accuracy of FIG. Since the shape of the connecting member 13 is simple, it is easy to ensure the above-mentioned accuracy, and the plate-shaped tube 11 and the thin fin plate 12 are completely joined. Since the pitch of the thin fin plates can be made uniform, heat transfer performance will not deteriorate. Furthermore, it is easy to reduce the above dimensions, thereby making it easy to reduce the pitch of the thin fin plates, increase the fin area per unit volume, and make a more compact heat exchanger.

In the embodiment shown in FIG. 1, there are three thin fin plates 12 and two connecting members 13, but there is no need to limit them in particular. Furthermore, by arranging the combinations shown in FIG. 1 in the horizontal direction, a heat exchanger suitable for the required amount of heat exchange can be made. Although the fin thin plate 12 is a flat plate here, it is also easy to apply various types of fin processing to promote heat transfer.

[Embodiment 2] FIGS. 2 and 3 show the main parts of a heat exchanger according to a different embodiment of the present invention. Three thin fin plates 15 or 16 are alternately placed on both sides of a plate-shaped tube 140 having a rectangular shape. The fin plates 16 and 16 have convex portions 17.
is provided.

If the convex parts 14 of adjacent thin fin plates are at the same position, the tip of the convex part 17 will enter the rear end of the adjacent convex part, making it impossible to keep the pitch of the thin plates constant. Fin thin plates 16 and 16 provided with convex portions 17 are arranged alternately. A convex portion 17 is located between the plate-shaped tube 14 and the thin fin plates 16 and 16, and connects the two in a thermally conductive manner.

Tube 14. The contact portions of the thin plates 16 and 16 are joined by brazing or the like. The fluid T flows within the plate-like tube 14, and the fluid U flows through the space formed by the plate-like tube 14 and the fin thin plates 16 and 16. The convex portion 17 is arranged to be elongated and parallel to the flow direction of the fluid U in consideration of the flow resistance of the fluid U. Heat exchange between both fluids is done through tube 14.
This is done not only from the 0 surface but also from the surfaces of the thin plates 15 and 16 via the convex portion 17. Therefore, from the viewpoint of performance of the heat exchanger, it is necessary to completely join the plate tube 14 and the thin fin plates 15 and 16.

In terms of dimensions, whether or not they can be joined is determined only by the accuracy of the height of the convex portion 17. Since the shape of the convex portion 17 is simple, it is easy to ensure the above-mentioned accuracy, and the plate-shaped tube 14 and the thin fin plates 15 and 16 are completely joined. Since the pitch of the thin fin plates can be made uniform, heat transfer performance will not deteriorate. Furthermore, it is easy to reduce the height of the convex portions 17, which makes it easy to reduce the pitch of the fins and increase the fin area per unit volume, making it easy to create a more compact heat exchanger.

In the embodiment shown in FIG. 2, three thin fin plates 15 or 1e are provided.
Although the number of sheets and the number of convex portions are set at two places each, there is no need to limit this in particular. Moreover, by arranging the combinations shown in FIG. 2 in the horizontal direction, it is possible to create a heat exchanger that matches the required amount of heat exchange. It is also easy to apply various types of fin processing to the surfaces of the thin fin plates 16 and 16 to promote heat transfer.

Part 3 shows a specific example of the shape of the convex portion of the fin thin plate 16, and shows a partially enlarged cross-sectional view of the fin thin plate 19.

By providing the trapezoidal convex portion 18, the pitch of the thin fin plates 19 can be made uniform by utilizing a portion of the taper.

[Embodiment 3] FIG. 4 shows the main parts of a heat exchanger according to still another embodiment of the present invention. Plate tube 20 having a rectangular shape
Three thin fin plates 21 or 22 are alternately located on both sides of the fin plate. The thin fin plates 21 and 22 have cut and raised portions 2.
3 is provided.

If the cut and raised parts 23 of adjacent thin fin plates are at the same position, the tip of the cut and raised parts 23 will enter the rear end of the adjacent cut and raised parts, making it impossible to keep the pitch of the fin thin plates constant. Fin thin plates 21 and 22 provided with raised portions 23 are alternately installed. A cut and raised portion 23 is located between the plate-like tube 20 and the thin fin plates 21 and 22, and connects the two in a thermally conductive manner. Plate tube 20. The contact portion of the fin thin plates 21 and 22 is
Joined by brazing etc. Fluid T is tube 20
The fluid U flows through the plate-shaped tube 20. Fin thin plate 21
and 22. The cut-and-raised portion 23 is arranged to be elongated and parallel to the flow direction of the fluid U in consideration of the flow resistance of the fluid U. Heat exchange between the two fluids occurs not only on the surface of the plate tube 2° but also on the cut and raised portion 23.
It is also carried out from the surfaces of the thin fin plates 21 and 22 via the fin plates 21 and 22. Therefore, from the performance standpoint of the heat exchanger, it is necessary to completely join the plate tube 20 and the thin fin plates 21 and 22. In terms of dimensions, the quality of the joint is determined only by the accuracy of the height of the cut and raised portion 23. Since the cut and raised portion 23 has a simple shape, it is easy to ensure the above-mentioned accuracy, and the tube 2o and the thin fin plates 21 and 22 are completely joined. In the processing of the cut and raised portions 23, since deep drawing is not required, it becomes possible to use an extremely thin sheet, which is advantageous in terms of materials. Since the pitch of the fins can be made uniform, heat transfer performance will not deteriorate. It is also easy to reduce the height of the cut and raised portion 23, which reduces the pitch of the fins and increases the fin area per unit volume.
It is also easy to create a more compact heat exchanger.

In this embodiment, there are three thin fin plates 21 or 22, and four cut-and-raised portions 23, but there is no need to limit them in particular. Furthermore, by arranging the combinations shown in FIG. 4 in the horizontal direction, it is possible to create a heat exchanger that matches the required amount of heat exchange. It is also easy to apply various fin processes to the surfaces of the thin fin plates 12 and 13 to promote heat transfer.

5 to 6 show enlarged cross-sectional views of other embodiments of the cut-and-raised portion. The cut-and-raised portion 24 in FIG. 5 has a U-shaped cut-and-raised shape. The cut-and-raised portion 25 in FIG. 6 has a U-shaped cut-and-raised shape,
The cut and raised angle has been changed. The cut-and-raised portion 26 in FIG. 7 has a Z-shaped cut-and-raised shape. By using such cut and raised portions 15 to 17, a heat exchanger can be constructed from one type of thin plate.

Effects of the Invention According to the present invention, an arbitrary number of fin thin plates are arranged in parallel or almost parallel at intervals between plate-like tubes, and the two are thermally connected by a connecting member, thereby forming a plate-like tube, a fin thin plate, and a connecting member. By forming the flow path portion of the other fluid using the material, the pitch of the thin fin plates can be uniformly and easily reduced, heat transfer performance is ensured, and the heat exchanger can be made more compact.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of a heat exchanger according to an embodiment of the present invention, FIGS. 2 and 4 are perspective views of main parts of a heat exchanger according to different embodiments of the present invention, and FIG. 5 to 7 are configuration diagrams of different embodiments of the cut-and-raised portion of FIG. 4, and FIG. 8 is a configuration diagram of main parts of a conventional heat exchanger. It is. 11... Plate tube, 12... Thin fin plate, 13... Connecting material. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Lower Figure 3 /8 Figure 4 Figure 5 Figure 6 Figure 7

Claims (4)

[Claims] (1) A plurality of plate-shaped tubes that form a flow path for one fluid are arranged at intervals approximately parallel to the plane, and an arbitrary number of thin fin plates are arranged between them at intervals approximately parallel to the plane of the plate-shaped tubes. A heat exchanger in which the two are heat-conductively connected by a connecting member, and a flow path portion for the other fluid is formed by the plate-like tube, the thin fin plate, and the connecting member. (2) The heat exchanger according to claim 1, wherein the connecting member has an elongated shape in the flow direction of the other fluid. (3) The heat exchanger according to claim 1 or 2, wherein the connecting member is a convex portion formed on the thin fin plate. (4) The heat exchanger according to claim 1 or 2, wherein the connecting member is a cut-and-raised portion formed on the thin fin plate.