JPH03213999A - Laminated heat exchanger - Google Patents

Abstract

PURPOSE:To make fluid flow evenly in each groove for improving heat exchanging capacity, by providing a plate, which has a space part on an end plate side and plural small holes on a header side, between an inlet pipe of the end plate and the header. CONSTITUTION:A number of heat exchanging plates 11 are laminated, a plate 12 having small holes, in which the sectional area is larger in the holes near a fluid inlet pipe than in those on the outer side, is provided on the both sides of the laminated plates 11, a plate 14 having a space part 13 is placed on the both plates 12, and further an end plate 15 is attached to the plate 14. All these plates 11, 12, 14 and 15 are fastened to each other intimately enough not to permit any leakage of fluid out of grooves 16. A fluid inlet/outlet pipe 17 is mounted on the end plate 15. The fluid entering from the inlet pipe 17 flows into the space part 13 of the plate 14 to be scattered, further flows into a header 18 through the small holes of the plate 12 to scatter into each of the grooves 16, and finally flows out. In this constitution, as the fluid is scattered in the space part 13 and dispersed into the grooves 16 evenly due to the sectional area of the small holes, the heat exchanging capacity can be 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.

Conventional technology Laminated heat exchangers are used to exchange heat between fluorocarbons, fluorocarbons and water, or water and water in air conditioning systems, etc. In recent years, with the diversification of air conditioning systems, the demand for them has increased. It's increasing.

A conventional stacked heat exchanger is disclosed in Japanese Unexamined Patent Publication No. 60-253794, and this stacked heat exchanger is shown in FIGS. 6 to 8.

FIG. 6 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 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 is attached. FIG. 7 is a perspective view showing an example of the heat exchange plate 1, and FIG. 8 is an enlarged sectional view taken along the line BB in FIG. 6.

The fluid flowing in from the inlet pipe 3 enters the header 4 and enters the groove 6.
It branches out 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 another fluid, and 7' is an outlet pipe for another fluid.By rotating the heat exchange plates 1 by 900 degrees and stacking them, a structure is created in which a different fluid flows through each heat exchange plate. Therefore, the groove portion 6 becomes a heat exchange portion, which exchanges heat with other fluids both above and below.

Problems to be Solved by the Invention However, in the above configuration, since the length L of the behenoder is long compared to the diameter of the inlet pipe 3, the grooves 5' on both ends of the heat exchange plate 1' near the inlet pipe 3 are This poses a problem in that the fluid becomes difficult to flow and the grooves 6' are not effectively utilized as heat transfer surfaces, resulting in a decrease in heat exchange performance.

In view of the above-mentioned problems, the present invention provides a laminated heat exchanger with improved heat exchange performance by improving shunt flow.

Means for Solving the Problems In order to solve the above problems, the laminated heat exchanger of the present invention includes an end plate having an inlet pipe and an outlet pipe for fluid, a plurality of grooves through which a fluid flows; A plurality of heat exchange plates each having a header communicating with the groove and another header separated from the header are laminated, and a heat exchange plate is provided on the end plate side between the fluid inlet pipe of the end plate and the header. The space part has a configuration in which a plate having a plurality of small holes with a large cross-sectional area outside the vicinity of the fluid inlet pipe is provided on the header side.

Effects According to the present invention, with the above configuration, fluid is diffused in the space between the fluid inlet pipe of the end plate and the plate having the small hole,
In addition, since the fluid resistance when passing through the plate having small holes is smaller on the outside than near the inlet pipe, the fluid can flow uniformly to the image area.

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 sectional view of the main parts of the laminated heat exchanger of the present invention, Fig. 2 is an external perspective view of the laminated heat exchanger of the present invention, and Fig. 3 is a small hole constituting the laminated heat exchanger. FIG. 4 is a perspective view of a heat exchange plate constituting the laminated heat exchanger, and FIG. 6 is a perspective view of the plate constituting the laminated heat exchanger.

As shown in FIG. 4, a large number of grooved heat exchange plates 11 are stacked, and on both sides there are small hole plates 12 with a larger cross-sectional area of the holes on the outside than near the fluid inlet pipe shown in FIG. Stack the plates 14 having the space 13 shown in FIG.
Further, end plates 15 are stacked on both sides of the heat exchange plate 11, plate 14, and end plate 15 to prevent fluid from leaking from the groove 16.
In this configuration, the fluid inlet and outlet pipes 17 are attached.

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

The water passes through the header 18, branches into the groove 16, and flows out. Then, it flows out from the outlet pipe 17' where it is collected by the other header 18. 19 is a header for other fluids, 20 is an inlet pipe for other fluids, and 20' is an outlet pipe for other fluids.By rotating the heat exchange plates 11 by 90 degrees and stacking them, a structure is created in which a different fluid flows through each plate. Become. Therefore, the groove portion 16 becomes a heat exchange portion, which exchanges heat with other fluids both above and below. As described above, according to this embodiment, since the space 13 of the plate 14 exists between the inlet pipe 17, which is the inlet of the fluid, and the header 18, 19, the fluid is sufficiently diffused in the space 13. In addition, since the cross-sectional area of the small holes in the plate is larger on the outside than near the inlet, the fluid resistance is smaller on the outside and the fluid can flow into the header 18 and 19 in a uniform state. , it is possible to branch uniformly into the groove portions 16, and it is possible to improve heat exchange performance.

In this embodiment, the space 13 is secured by sandwiching the plate 14 between the heat exchange plate 11 and the end plate 16, but the same effect can be obtained even if the end plate 16 and plate 14 are integrated. The gains are clear. Furthermore, although the shape of the small hole is round in this embodiment, it is clear that similar effects can be obtained with other shapes.

Effects of the Invention As described above, the present invention provides a space between a fluid inlet pipe and a header on the end plate side, and a plate having a small hole with a larger cross-sectional area outside the vicinity of the fluid inlet pipe on the header side. By this, the fluid can be diffused in the space, and the resistance of the fluid can be changed by the plate with small holes, and the header,
Since it is possible to branch uniformly into the grooves 9, heat exchange performance can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of essential parts of a laminated heat exchanger according to an embodiment of the present invention, FIG. 2 is an external perspective view of the same laminated heat exchanger, and FIG.
The figure is a plan view of a plate with small holes constituting the laminated heat exchanger, Figure 4 is a perspective view of a heat exchange plate constituting the laminated heat exchanger, and Figure 6 is a diagram of the laminated heat exchanger. FIG. 6 is a perspective view of a conventional laminated heat exchanger, FIG. 7 is a perspective view of a heat exchange plate constituting the laminated heat exchanger, and FIG. 8 is a perspective view of a conventional laminated heat exchanger. It is a BB sectional view. 11...Heat exchange plate, 12...Plate with small holes, 13...Space, 16...
...End plate, 16...Groove, 17, 20...
...Inlet pipe, 18, 19...Header Fig. II w-Population 1 H-P Bungabin 12- Small hole 1*T Shibun-F FJ-'! 2. FIJII? 15...-Nawatezaka 17, υ・-population lθ, tq-header! ? Fig. 2 - A broken FiFI master 19 “To Yter 4 Fig. Iris!

Claims (2)

[Claims] (1) A heat sink comprising an end plate having an inlet pipe and an outlet pipe for fluid, a plurality of grooves through which a fluid flows, a header communicating with the grooves, and another header separated from the header. A laminated heat exchanger in which a plurality of exchange plates are laminated, and a plate having a space on the end plate side and a plurality of small holes on the header side is provided between the fluid inlet pipe of the end plate and the header. vessel. (2) The laminated heat exchanger according to claim 1, wherein the cross-sectional area of the small holes in the plate having the plurality of small holes is larger on the outside than near the fluid inlet pipe.