JPH03177791A - Lamination type heat exchanger - Google Patents

Abstract

PURPOSE:To improve the heat exchanging performance by providing the grooves of a heat exchanging plate with choked parts at one end or both ends of the same. CONSTITUTION:The width of one side end of grooves 13 is narrowed to superpose a multitude of pieces of heat exchanging plates 11, having the choked parts 18, and end plates 12 are superposed on both sides thereof while heat exchanging plates 11 and the end plates 12 are contacted closely with each other so as to prevent the leakage of fluid from the grooves 13 and the inlet pipes 14, 15 as well as the outlet pipes 14', 15' of the fluid are attached. The fluid, entered from the inlet pipe 14, passes through a header 16 and is branched into the grooves 13 to flow out of them. Then, flows out of the outlet pipe of another fluid after being collected in the other header 17. When the heat exchanging plates 11 are laminated while turning them by 90 deg., different fluid flows in every one sheet and the grooves 13 become heat exchanging units while heat is exchanged between different fluids which flow through the upper and lower heat exchanging parts.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a stacked heat exchanger used in air conditioning systems and the like.

2. Description of the Related Art A conventional stacked heat exchanger is disclosed in Japanese Patent Laid-Open No. 60-253794, and this stacked heat exchanger is shown in FIGS. 6, 3 to 6.

FIG. 3 is a perspective view of a conventional laminated heat exchanger, in which a large number of grooved heat exchange plates 1 are stacked, end plates 2 are stacked on both ends,
It has a structure in which the heat exchange plate 1 button and the end plate 2 are closely attached by a method such as brazing to prevent fluid from flowing out of the groove, and the fluid inlet pipe 3 is attached.

FIG. 4 is a perspective view showing an example of the heat exchange plate 1, and FIG. 5 is a sectional view of essential parts of the laminated heat exchanger.

The fluid flowing in from the inlet pipe 3 enters the header 4 and the groove 6.
It branches to 6' and flows out. It is then collected by the other header 4 and flows out through the outlet pipe 3'. 6 is a header for other fluids, 7 is an inlet pipe for other fluids, and 7' is an outlet pipe for other fluids. By rotating the heat exchange plates 1 by 90 degrees and stacking them, a different fluid flows in each sheet. become. Therefore, the grooves 5 and 6' become heat exchange parts, and the problem to be solved by the present invention is that the grooves 5 and 6' become heat exchange parts and exchange heat with other fluids on both the upper and lower sides. Since L is long, much of the fluid flowing in from the inlet pipe 3 flows into the groove 6 near the line of the inlet pipe 3,
There was a problem in that the groove portion 5, in which fluid does not easily flow into the distant groove 6' on the inlet pipe 3 line, is not effectively utilized as a heat transfer surface, resulting in a decrease in heat exchange performance.

In view of the above problems, the present invention improves heat exchange performance.

Means for Solving the Problems In order to solve the above problems, the laminated heat exchanger of the present invention has the following features:
A plurality of heat exchange plates are laminated, each having an end plate having an inlet/outlet pipe for fluid, a plurality of grooves through which fluid flows, a header communicating with the grooves, and another header separated from the header. , a restriction is provided at one end or both ends of the groove of the heat exchange plate.

Function The present invention allows fluid to flow uniformly into the valley grooves due to the above-described configuration.

EXAMPLE Hereinafter, a stacked heat exchanger according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a laminated heat exchanger of the present invention, and FIG. 2 is an external view of a heat exchange plate.As shown in the figure, the width of one end of the groove is narrowed and a heat exchanger is provided with a constriction groove 18. A large number of plates 11 are stacked, and end plates 12 are stacked on both sides of the plates 11 to prevent fluid from leaking from the grooves 13. The end plate 12 is brought into close contact with the fluid inlet pipe 14.
．． 16 and outlet pipes 14' and 15' are attached.

The operation of the stacked heat exchanger configured as described above will be explained below.

The fluid flowing in through the inlet pipe 14 passes through the header 16, branches into the groove 13, and flows out. It then flows out into an outlet pipe 14' where it is collected at the other header 17. 17 is a header for other fluids, 15 is an inlet pipe for other fluids, and 15' is an outlet pipe for other fluids.By rotating the heat exchange plates 11 by 90' and stacking them, a structure is created in which a different fluid flows through each plate.

Therefore, the groove 13 functions as a heat exchange portion, and is configured to exchange heat with other fluids both above and below.

It has been found that by providing fluid resistance by providing a restriction 18 near the entrance of the valley groove 13, which corresponds to the flow path, as in this embodiment, the divided flow of the fluid can be equalized. Particularly when the refrigerant is a two-phase flow of gas and liquid, it has been found that the larger the volume of the header 16, the greater the effect. As a result, heat exchange performance could be significantly improved.

In this embodiment, one type of heat exchange plate 11 is alternately combined, and each heat exchange plate 11 is provided with grooves 13 on one side, but an alternate combination of two types of heat exchange plates can also have the same effect. The same effect can be obtained even when the individual heat exchange plates are combined with groove pattern punched plates and the Shiki 9 plate. Further, since the restrictor 18 is sometimes used by switching the direction of the fluid, the same effect can be obtained even if it is provided at both ends of the groove.

Effects of the Invention As described above, the present invention is capable of uniformly branching the fluid into the valley grooves by providing a restriction at one end or both ends of the groove of the heat exchange plate. Performance can be significantly improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a laminated heat exchanger according to an embodiment of the present invention, Fig. 2 is a plan view of a heat exchange plate constituting the laminated heat exchanger, and Fig. 3 is a conventional laminated heat exchanger. FIG. 4 is a sectional view of the laminated heat exchanger. 11... Heat exchange plate, 13... Groove, 18
・・・・・・Shiborishi.

Claims (1)

[Claims] A plurality of two types of heat exchange plates are stacked alternately, and two fluids flow through the heat exchange plates to exchange heat. Each heat exchange plate has a plurality of grooves. A laminated heat exchanger characterized by having a restriction provided at one or both ends.