JP2738760B2 - Stacked heat exchanger - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a laminated heat exchanger used for an air conditioning system or the like.

2. Description of the Related Art Stacked heat exchangers are used for exchanging heat between chlorofluorocarbons, chlorofluorocarbons and water, and water and water in air-conditioning systems and the like. The conventional example (see Japanese Patent Application Laid-Open No.
3794) will be described.

FIG. 4 is a perspective view of a conventional laminated heat exchanger, FIG. 5 is a perspective view of a heat exchange plate, FIG. 6 is a sectional view taken along line BB of FIG.
The figure is a sectional view taken along the line CC of FIG. As shown in the figure, in the conventional laminated heat exchanger, the grooved heat exchanger plates 1 are stacked by rotating each one by 90 °, and the heat exchanger plates 1 and The end plates 4 and 5 are brought into close contact with each other, and the inlet pipes 6 and 7 and the outlet pipes 8 and 9 for the fluid 2 are provided on the lines of the headers 10, 11, 12 and 13, and the inlet pipes 6 and 7 and the headers 10 and 11 are directly connected. Had a structure.

The fluid 2 flowing from the inlet pipe 6 enters the header 10, and is
It branches to 14a and 14b and flows out. And the other header 1
It is collected at 2 and flows out from the outlet pipe 8. Reference numeral 7 denotes an inlet pipe for the other fluid 3, reference numerals 11 and 13 denote headers for the other fluid 3, and reference numeral 9 denotes an outlet pipe for the other fluid 3. The heat exchange plate 1 is rotated by 90 [deg.] And different fluids 2 are stacked. , 3 flows. Therefore, the grooves 14a and 14b serve as heat exchange parts, and the upper and lower fluids
Heat exchange between two or three.

However, in the above configuration, the inlet pipe 6 is provided on the header 10 line, and the inlet pipe 6 and the header 10 are directly connected to each other. There is a problem that a large amount of fluid flows into the groove 14a near the pipe 6 and the fluid 2 hardly flows to the remote groove 14b on the inlet pipe 6, and the groove 14b is not effectively used as a heat transfer surface, and the heat exchange performance is reduced. there were.

Therefore, in view of the above problems, the present invention is to improve the heat exchange performance by uniformly branching a fluid into each groove.

Means for Solving the Problems In order to solve the above problems, a stacked heat exchanger of the present invention includes a plurality of grooves stacked and a plurality of grooves through which a fluid flows, and a plurality of headers communicating with the grooves. A heat exchange plate, an end plate having a fluid inlet pipe at a position shifted from the header line, and a fluid diffusion plate provided between the heat exchange plate and the end plate, wherein the fluid diffusion plate is A hole communicating with the header of the heat exchange plate, and a substantially triangular concave portion communicating with the hole at a bottom portion of the triangle and communicating with the inlet pipe near a vertex of the triangle.

Operation According to the present invention, with the above-described configuration, the fluid can be uniformly distributed on the header, and the fluid can be uniformly supplied to each groove.

Embodiment Hereinafter, a laminated heat exchanger according to an embodiment 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, FIG. 3 is a plan view of a fluid diffusion plate constituting the laminated heat exchanger of the present invention,
FIG. 1 is a sectional view taken along line AA of FIG.

As shown in the figure, the stacked heat exchanger of this embodiment has headers 10, 11, 12, and 13 formed of four rectangular through holes provided near each side and extending along the adjacent sides, and both ends. Four grooves 14a, 14b communicating with a pair of opposed headers 10, 12
A square heat exchange plate 1 having the grooves 14a and 14b facing upward, and rotating and stacking the square heat exchange plate 1 on each of the square end plates 25 having no holes by 90 °. On top of that, the same size as the headers 10, 11, 12, 13 of the heat exchange plate 1,
4 holes 2 communicating with headers 10, 11, 12, and 13 with through holes
0,21,22,23 and a substantially triangular recess 16 communicating with the holes 20,21,22,23 at the base of the triangle and the apex of the triangle being closer to the inner periphery than the holes 20,21,22,23, Fluid diffusion plate 15 having 17, 18, 19
Are stacked with the formation surfaces of the recesses 16, 17, 18, and 19 facing up,
Further, the inlet pipes 6, 7 and the outlet pipes 8, 9 for the fluid are displaced from the lines of the headers 10, 11, 12, 13 at positions near the apexes of the triangles of the substantially triangular recesses 16, 17, 18, 19. The end plates 24 are stacked and closely adhered so that the fluids 2 and 3 do not leak.

The fluid 2 flowing from the inlet pipe 6 flows into the header 10 through the recess 16 and the hole 20 and branches out into the grooves 14a and 14b to flow out. Then, it is collected by the other header 12 and flows out of the outlet pipe 8 through the hole 22 and the concave portion 18. 7 is an inlet pipe for the other fluid 3, 17, 19
Is a recess on the other fluid 3 side, 21 and 23 are holes on the other fluid 3 side, 11 and 13 are headers of the other fluid 3, 9 is an outlet pipe of the other fluid, and the heat exchange plates 1 are rotated by 90 ° and stacked. The structure is such that different fluids 2 and 3 flow for each sheet. Therefore, the grooves 14a and 14b serve as heat exchange portions, and perform heat exchange between the upper and lower different fluids 2 and 3.

In the present embodiment, the fluid 2 flowing from the inlet pipe 6 is
When flowing into 16, it collides with the wall surface of the recess 16 and is diffused,
Further, also when flowing into the header 10 through the hole 20, it collides with the hole 20 and the wall surface of the header 10, diffuses, and is uniformly dispersed in the header 10. Fluid 2 uniformly dispersed in header 10
Since the grooves can be uniformly branched into the grooves 14a and 14b, the heat exchange property can be improved.

Effects of the Invention As described above, the present invention provides a heat exchange plate including a plurality of stacked layers and a plurality of headers communicating with the grooves and a plurality of grooves through which fluid flows inside, and a position shifted from the header line. An end plate having a fluid inlet tube, and a fluid diffusion plate provided between the heat exchange plate and the end plate, wherein the fluid diffusion plate has a hole communicating with the header of the heat exchange plate. And a substantially triangular recess communicating with the hole at the base of the triangle and communicating with the inlet pipe near the apex of the triangle, so that the fluid flowing from the inlet pipe flows into the wall of the recess of the fluid diffusion plate. It collides and diffuses and flows out to the header while making it uniform along the generally triangular recess, allowing the fluid to diverge evenly into each groove, significantly improving the heat exchange performance of the stacked heat exchanger. Can be done.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a laminated heat exchanger according to an embodiment of the present invention, FIG. 2 is a perspective view of the laminated heat exchanger, and FIG. 3 is a fluid diffusion constituting the laminated heat exchanger. Plan view of plate, fourth
FIG. 5 is a perspective view of a conventional laminated heat exchanger, FIG. 5 is a perspective view of a heat exchange plate constituting the laminated heat exchanger, FIG. 6 is a sectional view taken along line BB of FIG. 4, and FIG. FIG. 5 is a sectional view taken along line CC of FIG. 1 ... heat exchange plate, 6,7 ... inlet pipe, 10, 11, 12, 13 ... header, 24, 25 ... end plate, 14a, 14b ... groove.

Continuation of the front page (72) Inventor Takashi Sugawara 3-22 Takaida Hondori, Higashiosaka-shi, Osaka Matsushita Refrigeration Machinery Co., Ltd. (56) References JP-A-2-238271 (JP, A)

Claims (1)

(57) [Claims] 1. A heat exchange plate comprising a plurality of stacked layers, in which a plurality of grooves through which a fluid flows, and a plurality of headers communicating with the grooves, and a fluid inlet pipe at a position offset from the header line. An end plate, and a fluid diffusion plate provided between the heat exchange plate and the end plate, wherein the fluid diffusion plate has a hole communicating with the header of the heat exchange plate, and a bottom portion of a triangle. A laminated heat exchanger having a substantially triangular recess communicating with the hole and near the apex of the triangle and communicating with the inlet pipe.