JPS6032800B2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger for exchanging heat between different air streams.

Conventionally, a heat exchanger has been used to construct parallel air channels by stacking a large number of heat-conductive partition plates in parallel with a gap of 4. Proposed.

Examples of this are shown in FIGS. 1 and 2.

First, in the example shown in Fig. 1, partition plates 1 and ducts 2 are stacked alternately to form parallel airflow paths, and by devising the position of opening 3 provided in duct 2, partition plates 1 are sandwiched. Air can flow alternately in different directions in each parallel air path. Next, in the example shown in Fig. 2, different air flows are alternately divided and supplied through each opening □ 6 to the parallel air passages constituted by the partition plate 4 and the spacer 5, similar to that shown in Fig. 1. be able to.

Now, in order to increase the heat exchange efficiency in a heat exchanger having such a structure, it is necessary to make the cutting plates 1 and 4 thinner.

However, with such a structure, if the partition plates 1 and 4 are made thinner, the partition plates 1 and 4 become more flexible. It was difficult to fit and hold, and was difficult to assemble, making it difficult to mass produce. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a heat exchanger with an improved structure so that each member can be easily assembled and mass-produced.

That is, the heat exchanger of the present invention has a plurality of grooves,
A plurality of sheets of the same configuration, in which the width of the groove is narrower than the width between adjacent grooves, are rotated 180 degrees every other time with the same face facing the same direction, and at least some of the grooves become parallel. In the part where the grooves are parallel to each other, the grooves are overlapped so that they are located between the grooves of the sheet that is in contact with the bottom side of the groove, and each groove and the entrance of this groove are overlapped. A flow path is formed between the adjacent grooves of the sheets that are in contact with each other, and the flow path in the groove of each sheet and the flow path located adjacent to both sides of the groove. The sheets face different fluid inlets and outlets, and each side of the sheet has a recess sandwiched between four protrusions, and a recess located in contact with the opening side of the groove. It is characterized by the outer bottom of the groove located at the outermost side of the sheet.

Embodiments of the present invention shown in the figures will be described below.

FIG. 3 schematically shows a heat exchanger according to the invention.
In this figure, 21 is a sheet made from a rectangular hard vinyl sheet by vacuum forming. This sheet 21
Grooves 21a and 21b are provided along the dark edges of the grooves 21a and 21b.
These L-shaped grooves 21a and 1-shaped grooves 21b are formed on the sheet 2.
When every other groove is rotated 180 degrees on the plane of 1 and overlapped with the one before rotation, both grooves 21a and 21b do not overlap, and L
Dimensions at various locations are selected so that the character-shaped groove 21a is arranged inside the character-shaped groove 21b. 21e, 21f, 21g
is a groove for rectifying the flow which is bent along the airflow path It is configured to have the same depth as 21a and 21b.

21h, 21j, 21i are rectifying fins with appropriate curved surfaces in order to smooth the flow of air at the bending part of the air path
Like g, it is a dent with the same depth as these.

21k, 211, 21m, 21n, 210 are 4 protrusions, which rotate the sheet 21 by 180 degrees and rotate the sheet 2 before rotation.
1, the L-shaped groove 21 of the sheet 21 before rotation
A is provided so as to surround the seat 21 after rotation and engage with the wall surface of the groove 21a of the seat 21 before rotation.

21p and 21q are engagement protrusions that protrude from the back side of the same machine so that the surface becomes a groove, and when the sheet 21 is rotated 180 degrees and stacked on the one before rotation, the one-character shape of the sheet 21 before rotation is formed. The portion of the sheet 2 that comes into contact with the groove 21b after rotation
1 and is provided so as to engage with the wall surface of the groove 21b of the sheet 21 before rotation.

Furthermore, the grooves 21e, 21f, and 21g for each rectification are L-shaped grooves 2 to prevent the airflow from leaking to other than the air path.
It is provided on the sheet 21 inside the portion surrounded by the small protrusion 21k.

To explain more specifically, the L-shaped groove 21a, the sheet 2
The gap d (a+b
10c) is provided apart from the outermost edge of the sheet 21. Also, L
Grooves 21r, 21s, 21t, 2 connected to the letter-shaped groove 21a
1u, 21v, and the groove 21 connected to the 1-shaped groove 21b
x is for ensuring that when a large number of sheets 21 are piled up one after another, the airflow is efficiently diverted to the respective gates 21c and 21d that are opened for each sheet 21, and does not leak to other areas. .

Further, as shown in the drawings, in order to prevent leakage of airflow, the various protrusions or grooves provided on the sheet 21 are provided so that they do not reach each side of the outer periphery of the sheet 21.

The sheet 21 having such a shape can be easily produced by using vacuum forming.

A heat exchanger 2 constructed in this way and configured by alternately stacking the sheet 21
The function of 2 will be explained with reference to FIG.

FIG. 4 is a sectional view showing approximately the center of the heat exchanger 22, near Z-Z in FIG.

In other words, the first air flow A flowing into the air path from the closed part of the stacked sheets 21X flows through each rectifying groove 21Xe.
, 21Xf, 21Xg, the sheet 2
1 flows out of the heat exchanger 22 in parallel flow direction.
At this time, a groove 21
Xbw is engaged, and the wall surface 21Xaw of the groove 21Xa is engaged with the recess between the small protrusions 21Yk and 21Ym, thereby preventing the first air amount A from leaking out of the air path X.

In addition, a part of the first air flow A that has spread in the air path
, 21Yf, and 21Yg. Conversely, the second air flow B flowing into the air passage Y from the opening □ of the sheet 21Y flows through each groove 2.
1Ye, 21Yf, and 21Yg, the air flows parallel to the longitudinal direction of the sheet 21Y and in a direction opposite to the first airflow A, and flows out of the heat exchanger 22. At this time, the second air flow B is similarly caused by the engagement of the small protrusions 21Xq, 21Xp with the wall surface 21Ybw of the groove 21Yb, and also by the engagement of the small protrusions 21Xk, 21Xm with the wall surface 21Yaw of the groove 21Ya. Prevent leakage outside of route Y. Furthermore, a second air flow B spread out in the air path Y
A portion of the sheet 21x flows into the groove of the sheet 21x, which is stacked on top of the sheet 21x. In this way, when the first air flow A and the second air flow B flow across the sheet 21 An exchange takes place.

Therefore, in this embodiment, the grooves 21Xe, 21Xf, 21Xg, 21Ye, 2
In the parts where 1Yf and 21Y are parallel to each other by several millimeters, the grooves are overlapped so that they are located between the grooves of the sheets 21Y and 21x that are in contact with the bottom side of this groove, and the grooves of each Flow paths Y and X are formed between the adjacent grooves of sheets 21Y and 21X that are in contact with the closed side of the sheet. Fluid inlets and outlets (corresponding to 21c and 21d shown in Fig. 3) are different from the flow channels located adjacent to both sides of the groove.
, and each of the sheets 21Y and 21
It has a recessed part sandwiched by
Outside lower part of a groove 21Xbj, 21Xaj, 2 1Ybj
, 21Yaj, so sheet 21
This makes it easier to align the heat exchangers when stacking them, making it easier to assemble the heat exchanger.

In addition, by providing a large number of grooves or a large number of small protrusions, these act as reinforcing ribs, so the sheet 21 can be made thinner by increasing its rigidity. It is possible to raise the heat exchange efficiency.

Further, an L-shaped groove 21a, a rectifying groove 21e, 2
Since different air flows flow through the portions 1f, 21g, 21h, 21i, and 21j, the heat exchange area of the heat exchanger 22 increases and the heat exchange efficiency improves. Of course, by providing the recesses sandwiched between the grooves and the small protrusions that engage with the grooves at appropriate positions, leakage of airflows and mixing of different airflows with each other are also reduced.

As explained above, the heat exchanger of the present invention has a plurality of grooves, and a plurality of sheets of the same configuration, each of which has a narrower width than the width between adjacent grooves, move on the same surface in the same direction. Towards,
Rotate every other 10 degrees so that at least some of the grooves are parallel, and where the grooves are parallel, between the grooves of the sheet where the grooves touch the bottom side of the grooves. Each groove and the adjacent groove of the sheet that is in contact with the closed side of this groove form a flow path, and the flow path in the groove of each sheet is The flow channel and the flow channels located adjacent to each other on both sides of the groove face different fluid inlets and outlets, and each of the sheets has a concave portion sandwiched by small protrusions on one side. and
It is characterized in that the outer lower part of the outermost groove of the sheet, which is located in contact with the closed side of the groove, is contained in this recess. Therefore, according to the present invention, the mutual alignment of the sheets constituting the heat exchanger and the assembly work are simple and reliable, and a heat exchanger that can be mass-produced can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view for explaining the configuration of a conventional heat exchanger, FIG. 2 is a perspective view for explaining the configuration of another conventional heat exchanger, and FIG. 3 is an embodiment of the present invention. A plan view for explaining the sheets constituting the example heat exchanger, and FIG. 4 is a partial cross-sectional view for explaining the structure and air flow inside the heat exchanger configured by the sheets shown in FIG. 3. It is. 21, 21X, 21Y are sheets, 21a, 21b, 2
1 e, 2 1 f, 2 1g, 2 1Xa, 2 1X
b, 2 1Xe, 2 1Xf, 2 1Xg, 2 1Ya
, 2 1Yb, 21Ye, 21Yf, 21Yg are grooves, 2
1c, 21d are fluid inlets, fluid outlets, 21Xaj, 21
Xbj, 21Yaj, 21Ybj are the outer lower parts of the outermost grooves, 21k, 21 1, 21m, 21n
, 21o, 21p, 21q, 21Xk, 21Xm, 2
1Xp, 2 1Xq, 2 1Yk, 2 1Ym, 21Y
p, 21Yq are small protrusions for constituting a recess, and X, Y are flow paths. Figure 1 Figure 2 Figure 4 Figure 3

Claims (1)

[Claims] 1. A plurality of sheets having the same configuration, each having a plurality of grooves, the width of which is narrower than the width between adjacent grooves, are rotated 180 degrees every other time with the same surface facing the same direction. rotate,
At least a portion of the grooves are parallel, and in the portion where the grooves are parallel, the groove is located between the grooves of the sheet contacting the bottom side of the groove. The grooves are stacked one on top of the other, and a flow path is formed between each of the grooves and the adjacent grooves of the sheet that is in contact with the opening side of the groove, and the flow in the groove of each of the sheets is The channel and the channels adjacent to each other on both sides of the groove face different fluid inlets and outlets, and each of the sheets has a recess on one side flanked by small protrusions. A heat exchanger characterized in that the outer bottom of the outermost groove of the sheet, which is located in contact with the opening side of the groove, is placed in the recess.