JPS61243297A - Lamination type heat exchanger - Google Patents

Abstract

PURPOSE:To eliminate the deformation of heat exchanging section or a groove and prevent leakage between respective fluids as well as between the outside of heat exchanger and respective fluids by a method wherein flat plates, having a groove and cutouts, are laminated and terminal plates, having groove and cutouts which are provided with the same configurations as the flat plates, are connected to the laminated flat plates. CONSTITUTION:Two kinds of flat plates 1a, 1b, having different configurations and provided with the groove for the flow paths of fluids and cutouts for entrance port or exit port of the fluids, are laminated alternately and the terminal plate 2a, having the same groove and cutouts as the flat plate 1a is connected to the flat plate 1a while the other terminal plate, having the same groove and cutouts as the flat plate 1b, is connected to the flat plate 1b. Accordingly, the connecting areas of the flat plate 1b becomes equal to the same area of the terminal plate 2a whereby the connecting strength of the terminal plate connected by brazing, diffusion welding or the like becomes equal to the connecting strength of lamination of respective flat plates and the leakage of fluid due to faulty connection may be prevented by the connecting surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to industrial applications such as air conditioning, refrigeration, solar heat utilization9 food processing,
The present invention relates to a stacked heat exchanger that mainly handles heat exchange between liquid-liquid or gas-liquid two-phase flow-liquid in the field of heat utilization such as the chemical industry.

Conventional technology FIG. 3 is an overall view of a conventional stacked heat exchanger.

A large number of flat plates 1 with grooves 6 and cutouts 6 are stacked, and both sides are reinforced for pressure resistance and the inlet and outlet pipes are attached.
Two types of flat plates 1a are made by stacking thick end plates 2 on top of each other to prevent fluid from leaking from the grooves 6.

1b are laminated alternately and the end plate 2 is tightly joined to the end thereof,
It has a structure in which a fluid inlet/outlet pipe 3 is attached. Fourth
FIG. 5 and FIG. 5 are views showing an example of a flat plate 1a in which grooves and cutouts 4 and 6 have different shapes.

1b represents two types. This is an example used for heat exchange between two fluids, where the fluid that flows in from the inlet/outlet pipe 3 enters through the inlet (cutout) 4, divides into the groove 6, flows out, and then flows into the other inlet (cutout). 4 and flows into the heat exchanger via the inlet and outlet pipes 3.

6 is a flat plate 1a, 1 which is an inlet/outlet (cutout part) for other fluids.
Each fluid flowing through b is of a type in which heat is exchanged both upward and downward by the groove portion 5.

FIG. 6 is a cross-sectional view taken along the line AA' shown in FIG. 3. Flat plate 1a.

The two fluids c and d are completely separated by 1b, and the grooves 5 exchange heat between the two fluids. In this case, the flat plate and the end plate are face-to-face joined by brazing or diffusion welding at high temperature while being pressurized from both sides of the end plate, thereby connecting the two fluids c and d or between the two fluids c and d and the outside of the heat exchanger. Prevents leakage.

Problems to be Solved by the Invention However, in terms of the joint area between the end plate 2a and the flat plate 1a and the joint area between the end plate 2b and the flat plate 1b, the former is larger than the latter by the area of the groove 5. At this time, the applied pressure per unit area is correspondingly small, and sufficient joint strength cannot be obtained in brazing or diffusion welding, resulting in leaks between the fluids or between the outside of the heat exchanger and the fluid. . On the other hand, if the pressure is increased to obtain sufficient bonding strength, the bonding area between the end plate 2b and the flat plate 1b, or between the flat plates 1a and I
The compressive deformation of the groove portion between b will increase, and there is a risk that the groove portion will be filled.

Means for Solving the Problems The present invention provides a heat exchanger in which end plates having the same groove and cutout shapes as the flat plates are laminated so as to be joined to the surface side of the flat plate which is not grooved. It forms the

According to the above-described configuration, the end plate that is joined to the groove-free surface of the flat plate has the same groove and cutout as one of the laminated flat plates, and the groove-free surface of the flat plate and this end plate Since the grooves and the cutout surfaces are joined, the joint area is the same as that of the joint surfaces of the laminated flat plates, and the pressurizing pressure per unit area of the joint surfaces is equal. FIG. 1 is a configuration diagram of a stacked heat exchanger according to an embodiment of the invention. Note that elements common to those in the conventional example are given the same numbers. Two types of flat plates 1a and 1b with different shapes having grooves serving as flow channels and cutouts serving as entrances and exits are laminated, and the end plate 2a has the same grooves and cutouts as the flat plate 1a as shown in Fig. 2. These flat plates 1a and 1b are alternately stacked and end plates 2a and 2b are joined to both ends thereof. Therefore, the joint area between the non-grooved surface of the flat plate 1b and the end plate 2a to be joined is the same as the laminated joint area of each flat plate, and the joint strength in brazing, diffusion welding, etc. is equal to the laminated joint strength of each flat plate. , leakage of fluid due to poor bonding on this surface can be prevented.

In the above embodiment, two types of flat plates are used to form two channels in which the grooves are passed through the cutouts in every other layer, but if three types of flat plates are used, three independent channels are formed. It is also possible to form a flow path. Furthermore, the shape of the grooves has been devised to promote heat transfer, and by intersecting the grooves between adjacent flat plates, it is possible to freely design counter-flow, cross-flow, parallel flow, etc. to increase heat exchange efficiency.

Effects of the Invention According to the present invention, by stacking flat plates having grooves and cutouts on each other and joining end plates having grooves and cutouts of the same shape as the flat plates, each fluid can be heated without deforming the grooves, which are heat exchange parts. It is possible to prevent leaks between the heat exchanger and the outside of the heat exchanger and each fluid.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a stacked heat exchanger according to an embodiment of the present invention, FIG. 2 is a perspective view of the end plate 2a in FIG. 1, and FIG.
The figure is an overall perspective view of a conventional laminated heat exchanger according to an embodiment, FIG. 5 is a sectional view taken along the line A-A' in FIG. The figure is a perspective view of the flat plate in FIG. 3. 1a, 1b... Flat plate, 2a, 2b...
End plate, 3... Fluid inlet/outlet pipe, 4, 8...
- Cutout (fluid inlet/outlet), 6...Groove. Name of agent: Patent attorney Toshio Nakao and 1 other person/l
l-/b--Ippei Ohan 111 figure and 21)-4 board 0 support--,L
Ban, 2pe/-m-flat plate 2α--one end plate 3-Iichisawa entrance Sugesuke C↑d

Claims (1)

[Claims] A first thin plate having a groove whose end portion is connected to the pair of cutouts and another pair of cutouts separated from these, and a first thin plate having a cutout having the same shape and connected to the other pair of cutouts. The structure is such that second thin plates having grooves are alternately laminated and both ends of the second thin plates are sandwiched between thick plates. A laminated heat exchanger with a groove and a cutout or recess of the same shape as the cutout connected to the groove.