JPH0363496A - Layer type heat exchanger - Google Patents

Abstract

PURPOSE:To improve a heat exchanging performance by a method wherein a width of each of grooves in a heat exchanging plate is made wider at a far part than a near portion on a line of an inlet pipe and fluid is uniformly branched to each of the grooves. CONSTITUTION:Several heat exchanging plates 11 having widths of grooves 13 and 13' narrower at their central portions and wider at their both ends air piled up. End plates 12 are piled at both sides. The heat exchanging plates 11 and the end plates 12 are closely contacted so as to prevent fluid from leaking at the grooves 13 and 13' and then fluid feeding-in or feeding-out pipes 14, 15 and 15' are fixed. Fluid flowed from an inlet pipe 14 passes through a header, branches into the grooves 13 and 13' and flows out of them. The fluid flows out of outlet pipes collected at one header. The far groove 13' on a line of an inlet pipe 14 is wider than a width of the groove 13 near on the line of the inlet pipe 14 where much fluid flow is found, thereby a fluid resis tance at the groove 13' is made smaller as compared with that of the groove 13, the fluid is uniformly branched to the grooves 13 and 13' and then a heat exchanging performance is improved.

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 Application Laid-Open No. 60-253794, and this stacked heat exchanger is shown in FIGS. 4 to 6.

FIG. 4 is a perspective view of a conventional stacked heat exchanger, in which a large number of grooved heat exchange plates 1 are stacked, and end plates 2 are stacked on both ends of the heat exchange plates 1.
It has a structure in which the heat exchange plate 1 and the end plate 2 are brought into close contact with each other to prevent fluid from leaking from the groove, and a fluid inlet pipe 3.7 is attached. FIG. 6 is a perspective view showing an example of the heat exchange plate 1;
The figure is an enlarged sectional view taken along the line BB in FIG. 4.

The fluid flowing in from the inlet pipe 3 enters the header 4 and enters the groove 5.
It branches into d and flows out. Then, it is collected by the other header 4 and flows out from the outlet pipe 1. 6 is a header for other fluids,
7 is an inlet pipe for another fluid, and 7' is an outlet pipe for another fluid. By rotating the heat exchange plates 1 by 90 degrees and stacking them, a structure is created in which a different fluid flows through each plate. Therefore, the grooves 5 and 5' become heat exchange parts, and the problem to be solved by the present invention is to exchange heat with other fluids both above and below. However, in the above structure, the length L of the header is Because of the long length, more of the fluid flowing in from the inlet pipe 3 flows into the groove 6 near the inlet pipe 3 line, and it becomes difficult for fluid to flow into the groove 6' further away on the inlet pipe 3 line, making the groove part d effective as a heat transfer surface. The problem was that heat exchange performance deteriorated because it was not utilized effectively.

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. , the width of the groove of the heat exchange plate is made wider at the distance from the vicinity on the inlet pipe line.

Function: With the above-described configuration, the present invention allows fluid to flow uniformly into each groove.

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

FIG. 2 is a perspective view of the laminated heat exchanger of the present invention, and FIG.
FIG. 3 is a sectional view taken along line AA in FIG. 2;

Figure 3 is an external view of the heat exchange plate.As shown in the figure, the width of the groove is
A large number of heat exchange plates 11 each having a narrow groove in the center and wide grooves at both ends are stacked, and end plates 12 are stacked on both sides of the heat exchange plates 11, and the heat exchange plates 11 and end plates 12 are closely attached to prevent fluid from leaking from the grooves 13.1d. , fluid inlet and outlet pipes 14.14' and 15.15' are attached.

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

The fluid flowing in from the inlet pipe 14 passes through the header 16, branches into the grooves 13, 13', and exits. It then flows out through the outlet pipe 14' where it is collected by the other header 17. 1
7 is a header for other fluids, 16 is an inlet pipe for other fluids, and 1d is an outlet pipe for other fluids.By rotating the heat exchange plates 11 by 9σ and stacking them, a structure is created in which a different fluid flows through each plate. Therefore, the grooves 13 and 13' become heat exchange parts, which exchange heat with other fluids both above and below. As described above, according to this embodiment, the inlet pipe 14 with a large flow of fluid
By making the groove 1 at the far end on the inlet pipe 14 line wider than the width of the groove 13 near the line, the fluid resistance of the groove 13' becomes smaller than that of the groove 13, and the fluid flows uniformly into the grooves 13 and 13'. It can be branched to improve heat exchange performance.

Effects of the Invention As described above, the present invention makes the width of the groove of the heat exchange plate wider at the distance from the vicinity on the inlet pipe line.

It becomes possible to uniformly branch the fluid to each groove, and heat exchange performance can be significantly improved.

[Brief explanation of drawings]

'Figure 1 is a sectional view of essential parts of a laminated heat exchanger according to an embodiment of the present invention, Figure 2 is a perspective view of the same heat exchanger, and Figure 3 is a diagram showing the heat constituting the laminated heat exchanger. FIG. 4 is a perspective view of a conventional laminated heat exchanger, FIG. 5 is a perspective view of a heat exchange plate constituting the same laminated heat exchanger, and FIG. 6 is B of FIG. 4. −
It is a sectional view of B. 11... Heat exchange plate, 12... End plate, 1
3.13'...Groove, 14.15...Inlet pipe, 18.17...Header

Claims (1)

[Claims] Laminating a plurality of heat exchange plates 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 laminated heat exchanger characterized in that the width of the groove of the heat exchange plate is wider at a distance from the vicinity on the inlet pipe line.