JPH04371793A - Lamination type heat exchanger - Google Patents

Abstract

PURPOSE:To improve branch stream in a direction orthogonal to main stream in a lamination type heat exchanger employed for an air-conditioning system and the like. CONSTITUTION:The title heat exchanger is constituted of an end plate, having an inlet port and an outlet port of fluid, holes 31, 33, communicated with the outlet and inlet ports, and a plurality of plates 21 having a plurality of grooves 30a, 30b, in which the fluid flows, while the holes 31, 33 are characterized by providing the holes 31, 33 with sawteeth type recesses and projections.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger used in air conditioning systems and the like.

0002

[Prior Art] Laminated heat exchangers are used in air conditioning systems to exchange heat between fluorocarbons, fluorocarbons and water, or between water and water.In recent years, with the diversification of air conditioning systems, Demand is increasing.

A conventional example (Japanese Unexamined Patent Publication No. 3-20592) will be described below with reference to FIGS. 5 to 8.

FIG. 5 is an exploded perspective view of a conventional stacked heat exchanger, FIG. 6 is a plan view of the primary plate 1, FIG. 7 is a plan view of the seal plate 2, and FIG. 8 is a plan view of the secondary plate 3. It is a diagram. As shown in the figure, the conventional laminated heat exchanger has a plurality of primary plates 1, seal plates 2, and secondary plates 3 stacked alternately, with inlet parts 4, 5 and outlet parts 6, 7 at both ends.
It has a structure in which an end plate 8 and an end plate 9 having an end plate 8 and an end plate 9 are brought into close contact with each other to prevent internal fluid from leaking.

[0005] Fluid flowing in from the inlet portion 4 enters through a hole 11 communicating with the inlet portion 4, branches into grooves 10a and 10b, and flows out. Then, it passes through the other hole 13 and flows out from the outlet section 6. 5 is an inlet for other fluids, 12 and 14 are holes for other fluids, and 7
is an outlet section for other fluids, and a plurality of primary plates 1, seal plates 2, and secondary plates 3 are stacked alternately.
The structure is such that different fluids flow between the next plate 1 and the secondary plate 3. Therefore, the seal plate 2 becomes a heat exchange part, and heat exchange is performed between different fluids on both the upper and lower sides.

[0006]

However, in the above-mentioned conventional structure, the fluid flowing in from the inlet portion 4 flows mostly into the grooves 10a near the inlet portion 4, and flows into the grooves 10a on both sides of the inlet portion 4.
There was a problem in that it became difficult for fluid to flow through the grooves 10b, and the grooves 10b were not effectively utilized as heat transfer surfaces, resulting in a decrease in heat exchange performance.

The present invention solves the above-mentioned conventional problems, and improves heat exchange performance by uniformly branching fluid into each groove.

[0008]

[Means for Solving the Problems] In order to achieve this object, the stacked heat exchanger of the present invention includes an end plate having an inlet/outlet portion for fluid, a hole communicating with the inlet/outlet portion, and a hole through which a fluid flows. Consisting of multiple plates with multiple grooves to
, a saw-shaped unevenness is provided in the hole communicating with the entrance/exit portion.

[0009]

[Operation] With this structure, the fluid can be uniformly distributed inside the header, and the fluid can flow uniformly into each groove.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of the primary plate 21, and FIG.
3 is a plan view of the seal plate 22, FIG. 3 is a plan view of the secondary plate 23, and FIG. 4 is a perspective view of the laminated heat exchanger of the present invention.

As shown in the figure, the laminated heat exchanger of the present invention has holes 31, 32, 33 in the primary plate 21 and the secondary plate 23 communicating with the inlet/outlet portions 24, 25, 26, 27.
, 34, the primary plate 21 and the seal plate 2.
2. An end plate 28 in which a plurality of secondary plates 23 are alternately stacked and has entrance/exit portions 24, 25, 26, 27 at both ends thereof.
It has a structure in which the end plate 29 is brought into close contact with the end plate 29 to prevent internal fluid from leaking, and the holes 31 and 33 are provided with saw-shaped irregularities.

[0013] Fluid flowing in from the inlet portion 24 enters the hole 31, branches into grooves 30a and 30b, and flows out. Then, it passes through the other hole 33 and flows out from the outlet section 26. 25 is an inlet part for other fluids, 32 and 34 are holes for other fluids, and 27 is an outlet part for other fluids, and a plurality of primary plates 21, seal plates 22, and secondary plates 23 are alternately stacked, The structure is such that different fluids flow through the primary plate 21 and the secondary plate 23. Therefore, the seal plate 22 becomes a heat exchange part, and heat exchange is performed between different fluids on both the upper and lower sides.

In this embodiment, the fluid receives a force in the direction of the tip of the convex part of the saw-like unevenness of the hole 31 having saw-like unevenness due to the surface tension effect, and has a velocity component perpendicular to the main flow direction. Evenly distributed inside the hole 31, the grooves 30a,
30b, the heat exchange performance can be improved.

[0015]

As described above, the present invention comprises a plurality of plates having an end plate having an inlet/outlet portion for fluid, a hole communicating with the inlet/outlet portion, and a plurality of grooves through which fluid flows, By providing saw-shaped irregularities in the hole, a force is applied in the direction of the tip of the convex part of the saw-shaped irregularities, and since the velocity component is perpendicular to the main flow direction of the fluid, the fluid is uniformly distributed to each groove. It becomes possible to branch, and heat exchange performance can be significantly improved.

[Brief explanation of drawings]

[Fig. 1] A plan view of the primary plate of a stacked heat exchanger in an embodiment of the present invention.

[Figure 2] Plan view of the seal plate of the laminated heat exchanger

[
Figure 3: Plan view of the secondary plate of the same laminated heat exchanger

[Figure 4] Perspective view of the same laminated heat exchanger

[Figure 5] Exploded perspective view of a conventional stacked heat exchanger

[Figure 6] Plan view of the primary plate of a conventional stacked heat exchanger

[Figure 7] Plan view of the seal plate of a conventional laminated heat exchanger

[Figure 8] Plan view of the secondary plate of a conventional stacked heat exchanger

[Explanation of symbols]

24, 25, 26, 27 Entrance/exit 28, 29 End plate 31, 32, 33, 34 holes 30a, 30b groove 21, 22, 23 plates

Claims (1)

[Claims] 1. An end plate having an inlet/outlet portion for fluid, a hole communicating with the inlet/outlet portion, and a plurality of plates having a plurality of grooves through which fluid flows, the end plate communicating with the inlet/outlet portion. A laminated heat exchanger characterized by having saw-shaped irregularities in the holes.