JPH10318692A - Vertical multi-plate type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a heat transfer efficiency by flowing down heat transfer medium while forming a uniform film thickness on the overall surface of a heat transfer wall surface. SOLUTION: The vertical multi-plate type heat exchanger comprises a plurality of elements 10 formed by superposing two slender plate-like materials formed with irregularities on both surfaces and vertically disposing them. In this case, openings are formed at both ends of the materials in a lengthwise direction. And, flat surfaces 6a, 7a are formed protruding in the same height as convexes of the shape on the surface A of the material around the openings. The shape is formed of grooves 3 and strips 2a arranged at an equal interval alternately in the lengthwise direction of the materials and extended straightly in parallel continuously or intermittently in a width direction. And, the grooves 3a are formed in a sectional shape of the groove 3a corresponding to the recess of the shape executed on the one surface A in an equal two-dimensional curvature groove shape. The element 10 is formed by superposing one surface A of the two plate-like materials 1 at outside and the other surface B at inside, and bringing a plurality of the elements 10 into contact and superposing the surfaces 6a, 7a to be connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an element formed by stacking two long and thin plate-shaped bodies, each of which has an uneven surface on both sides, in a vertical arrangement with the longitudinal direction thereof being up and down. A stacked multiple-plate heat exchanger in which a space inside each element is a passage for one heat transfer medium to pass, and a space between each element is a passage for the other heat transfer medium to pass. More particularly, the present invention relates to a vertical multi-plate heat exchanger suitable for use as an absorber or an evaporator in an absorption refrigerator.

[0002]

BACKGROUND OF THE INVENTION As a heat exchanger of the type described above, the applicant has
Previously, the invention of Japanese Patent Application No. 8-313377 was proposed. In this device, as shown in FIG. 22, irregularities are formed on both sides of each plate-like member 01 forming a heat exchanger element.
Grooves (W-shaped, V-shaped or M-shaped) concave grooves 03 arranged alternately at equal intervals in the longitudinal direction and extending in the width direction.
And ridges 02.

[0003]

However, in the prior art, the heat transfer medium flowing down in the space between the elements tends to gather at the bottom of the W-shaped groove 03 as shown in FIG. 22D. There was a non-wetting portion E on the top. Such a phenomenon similarly occurs in the case of a V-shaped groove or an M-shaped groove. In the non-wetting portion, heat transfer between the two heat transfer media is not performed.

Further, in the above-mentioned conventional device, the unevenness formed on both surfaces of each plate-like body 01 cannot be said to be of an appropriate shape. For example, in the case of the shape shown in FIGS. On the other hand, the liquid as the heat transfer medium was biased toward the bottom of the concave groove 03 and the corners on both sides due to the influence of the surface tension, and the liquid film could not be made uniform. As a result, heat transfer is not performed in the portion of the concave groove 03 that is not wet, and the temperature gradient is gentle in the portion where the liquid film is thick, so that the heat transfer efficiency is reduced.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a vertical multi-plate heat exchanger which has solved the above-mentioned problems. A plurality of elements formed by stacking two elongated plate-like bodies on top of each other are vertically stacked with their longitudinal direction up and down, and one heat transfer medium passes through the space inside each element. In the vertical multi-plate heat exchanger which is a passage and a passage for the other heat transfer medium passing through the space between the elements, each plate-like body has openings formed at both ends in the longitudinal direction. Around the opening, a flat surface protruding to at least the same height as the projections of the irregularities applied to the surface on one surface of the plate-shaped body, and applied to at least the surface on the other surface. Flat surface recessed to the same depth as the concave portion of the unevenness, Respectively, the irregularities are formed by concave grooves and ridges which are arranged alternately at equal intervals in the longitudinal direction of each of the plate-like bodies and extend straight or parallel continuously or intermittently in the width direction. A cross-sectional shape of the concave groove corresponding to the concave portion of the concavo-convex formed on one surface of each of the plate-like bodies is formed into a two-dimensional curvature groove shape; Each of the plate-like bodies is formed so as to overlap each other with one surface on the outside and the other surface on the inside, and a plurality of the elements are overlapped by bringing the protruding flat surfaces into contact with each other. This is a vertical multi-plate heat exchanger characterized by being joined together.

According to the first aspect of the present invention, the unevenness formed on both surfaces of each plate-like body forming the heat exchanger element is continuous or intermittent in the width direction. It is formed by concave grooves and ridges that extend straight and parallel in parallel, and since its planar shape is not corrugated,
The heat transfer medium flowing down in the space between the elements and between the elements does not tend to gather at a specific location, and the heat transfer wall does not have a non-wetting portion, so that the heat transfer efficiency is improved.

[0007] The cross-sectional shape of the concave groove corresponding to the concave and convex concave portions formed on one surface (the surface forming the outside of the heat exchanger element) of each plate-like body is formed into a two-dimensional curvature groove shape. Therefore, the heat transfer medium flowing down across the concave groove flows down while forming a uniform film thickness, and good heat transfer is performed on the entire surface of the heat transfer wall, so that the heat transfer efficiency is reduced. Further improve. In particular, when the heat transfer medium is a fluid containing a plurality of components having different boiling points, the effect is remarkable.

Further, according to the first aspect of the present invention, the passage of the heat transfer medium formed in the space inside each heat exchanger element and the space between each element are formed. Each of the formed passages of the heat transfer medium is formed in such a manner that the ridges of the other plate-like member enter the concave grooves of one plate-like member, so that the passages flow down those passages. The generated heat transfer medium flows in a meandering manner, causing a disturbance effect, and the dead water area is greatly reduced, so that the heat transfer efficiency is further improved. In addition, the distance between the two plate-like bodies is reduced by the distance that the ridge of the other plate-like body enters the concave groove of one plate-like body, so the width dimension of the heat exchanger is reduced by that much. As a result, the heat exchanger can be downsized.

According to the third aspect of the present invention, when each heat exchanger element is formed, one of the same two plate-like bodies is used. The other plate-shaped body is turned upside down so that one surface is outside, and the upper and lower ends are only reversed and the upper and lower ends of the other plate-shaped body are overlapped, and the unevenness of each plate-shaped body is reduced. It is possible to easily obtain a heat exchanger element whose pitch is shifted by １ ／ pitch.

[0010] According to the fourth aspect of the present invention, the passage of the heat transfer medium formed in the space between the heat exchanger elements is formed. The required area of the cross-sectional area can be secured, and the flow resistance of the heat transfer medium can be reduced. Further, the structural strength of the heat exchanger can be improved.

Further, by constituting the invention of claim 4 as described in claim 5, it is easy to distinguish the upper and lower sides of each plate-like body, so that when forming the heat exchanger element,
The work of reversing the upper and lower ends of one of the two plate-like bodies with the upper and lower ends of the other plate-like body is facilitated. In addition, when the heat exchanger elements are overlapped and brazed to form a vertical multi-plate heat exchanger, the brazing portion around the small projections often turns around the brazing portion between the large projections and the small projections. So that their adhesion is completely achieved.

Further, by constituting the invention of claim 4 or claim 5 as described in claim 6, a large number of plate-like members forming the heat exchanger element can be formed by a usual press working method. , Can be easily formed at once.

[0013] According to the seventh aspect of the present invention, the heat transfer medium passage formed in the space inside each heat exchanger element. Can be reliably separated from the passage of the heat transfer medium formed in the space between the elements, so that it is possible to reliably prevent one heat transfer medium from leaking to the other heat transfer medium. it can. Further, the structural strength of the heat exchanger can be improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the invention described in claims 1 to 7 of the present application, shown in FIGS. 1 to 21, will be described below. First, FIGS. 1 to 1
A plate-like body, which is shown in FIG. 2 and is a basic component of the vertical multi-plate heat exchanger of the present embodiment, will be described. The vertical multi-plate heat exchanger of the present embodiment and the heat exchanger element as a constituent unit thereof are formed of this single kind of plate-like body.

In these figures, 1 is a plate-like body,
The plate is formed by pressing a plate material made of aluminum or steel, whose center at both ends is slightly protruded, by pressing. Reference numeral 2a denotes a ridge formed in this way on the surface A, which is the surface of the plate-like body 1, and the ridge is described later as shown in FIGS. 4, 6, and 7. It is formed in a slightly sharper shape than the concave groove 3a. Reference numeral 3a designates a concave groove formed between the ridges 2a in the same manner. The ridges 2a and the concave grooves 3a are alternately arranged at equal intervals over the entire length of the plate-like body 1 in the longitudinal direction.

The center line WCL of the total width (the total length in the longitudinal direction of the plate-like body 1) of the alternating arrangement of the ridges 2a and the concave grooves 3a.
Is 1/1 of the pitch of the equidistant arrangement of the ridges 2a and the concave grooves 3a with respect to the longitudinal center line CL of the plate-like body 1.
They are shifted by four pitches.

As described above, by displacing both center lines by １ ／ pitch, a heat exchanger element described later can be formed.
When forming 10, one plate-like body 1 of the same two plate-like bodies 1 is turned over with respect to the other plate-like body 1 so that one surface (A surface) is outside, In addition, simply by superposing the upper and lower ends thereof on the opposite sides of the upper and lower ends of the other plate-like body 1, the pitch of the unevenness (the concave groove 3a and the ridge 2a) of each plate-like body 1 is shifted by ピ ッ チ pitch. The formed heat exchanger element 10 can be easily obtained.

The ridge 2a is formed so as to extend straight in the width direction of the plate-like body 1 while being divided into four large and small ridge elements (see FIGS. 1, 10 and 12). . Also,
The concave grooves 3a are formed by three to five large projections 4 described later.
It is formed so as to be divided into a plurality of concave groove elements or continuously without being divided (see FIGS. 1 and 11) and to extend straight in the width direction of the plate-like body 1 in parallel with the ridge 2a. ing.

The cross-sectional shape of the concave groove 3a is formed in an equal two-dimensional curvature groove shape in which the curvature at each point is equalized, so that the heat transfer medium flowing in contact with the concave groove 3a is uniform. Since it flows while forming an appropriate film thickness, good heat transfer is performed on the entire surface of the heat transfer wall surface, and the heat transfer efficiency is greatly improved. In particular, the heat transfer medium has a different boiling point.
The effect is remarkable in the case of a multi-component fluid containing more than one type of component. Regarding this point, JP-A-63-1239
No. 96 describes this in detail.

The groove 3a, which is above the center line CL in the longitudinal direction of the plate-like body 1 in FIG.
In every other row or every two rows, the groove 3a is centered on the groove 3a.
a, two to four large projections 4 are formed straddling the ridges 2a, 2a adjacent to the large projections 2a, and the concave grooves 3a on which these large projections 4 are formed are, as described above, these large projections. 4 extend in the width direction of the plate-like body 1 while being divided into three to five concave groove elements. (FIGS. 1, 4, 5, and 11
reference)

Further, a center line C in the longitudinal direction of the plate-like body 1 is provided.
The two or four small protrusions 5 are continuously or alternately arranged in every other row or every other row on the lower ridge 2a in FIG.
Are formed. These small projections 5 are formed one by one on any of the four ridge elements of the divided ridge 2a (see FIGS. 1, 4, 6, and 12).

The large projections 4 and the small projections 5 are formed in a circular cross section, at the same height, and at positions symmetrical with respect to the longitudinal center line CL of the plate-like body 1. I have. Also, in each case, the center line (II
-II line). As described later, the large projections 4 and the small projections 5 are used to form a plurality of heat exchanger elements 10 to form a vertical multi-plate heat exchanger 20. Used as a means to maintain spacing.

As described above, the ridge 2 is formed on the surface A of the plate-like body 1.
a and the groove 3a are formed, so that the surface B, which is the back surface of the plate-like body 1, is simultaneously formed with the groove 3a corresponding to the ridge 2a.
b is formed with a ridge 2b corresponding to the concave groove 3a.

Further, in the slightly protruding portion at the center of both ends in the longitudinal direction of the plate-like body 1, an opening 6 is provided at a position symmetrical with respect to the longitudinal center line CL of the plate-like body 1,
Openings 7 are respectively formed in a circular shape on the lower side. Around these openings 6 and 7, on the A surface of the plate-like body 1, flat surfaces 6 a protruding to the same height as the large projections 4 and small projections 5 formed on the A surface,
7a, the large projections 4 and the small projections 5 formed on the surface A of the plate-like body 1 are recessed to the same depth (deeper than the groove 3b) as the bottom of the hole formed on the surface B. Flat surface 6
b and 7b are formed respectively (see FIGS. 3, 4, 8, and 9).

The regular arrangement of the ridges 2a, the concave grooves 3a, the ridges 2b, the concave grooves 3b, the large projections 4 and the small projections 5 formed on the plate-like body 1 as described above depends on the plate. At both ends of the plate-like body 1, the plate-like body 1 is cut by both side edges extending inclining toward the center of both ends thereof and the flat surfaces 6 a, 7 a, 6 b, and 7 b around the openings 6 and 7. It is missing (see FIGS. 1 and 3).

The ridge 2a, the groove 3a, the ridge 2b, the groove 3b, the large protrusion 4, the small protrusion 5, the opening 6, the opening 7, the flat surface 6a, 7a, 6b, 7
b and the like are formed at once by subjecting the material plate of the plate-shaped body 1 to press working. Thereby, many plate-like bodies 1 can be easily formed. In addition, the flat surface 8 as before is left in the peripheral part of the raw material plate which has not been subjected to the press working.
2 and FIG. 4 from left to right.

Next, a description will be given of a heat exchanger element shown in FIG. 13, which is a structural unit of the vertical multi-plate heat exchanger of the present embodiment. As described above, the heat exchanger element 10 is formed using two pieces of the single type plate-like body 1 formed as described above.

First, one of the two plate-like members 1 placed in the same posture is placed on the other plate-like member 1 with one surface (A-side) facing outward. It is turned over, and the upper and lower ends thereof are reversed with the upper and lower ends of the other plate-shaped body 1 to be overlapped. Then, the flat surfaces 8 of each peripheral edge of both plate-like bodies 1, the back surface of each groove 3 a and the back surface of the discontinuous portion of each ridge 2 a, which are in contact with each other (see FIG. 19). When the heat exchanger element 10 is fixed by attachment or the like, the heat exchanger element 10 is obtained.

In other words, the two B-shaped bodies 1 face each other, the upper and lower ends thereof are reversed, the two B-shaped bodies 1 are overlapped, and the abutting parts are joined together. When the heat exchanger element 10 is fixed by attachment or the like, the heat exchanger element 10 is obtained. Note that, in the present embodiment, this fixation is performed simultaneously with the temporary assembling by a brazing after the temporary assembling of the vertical multiple-plate heat exchanger 20 described later.

The heat exchanger element 10 thus obtained
Are the irregularities of the two plate-like bodies 1 (a concave groove 3a and a ridge 2a).
Are just shifted by ピ ッ チ pitch as described above. Therefore, as is clear from FIG.
The grooves 3a and the ridges 2a of the two plate-shaped members 1 no longer face back to back, and the grooves 3b (the back surface of the ridges 2a) of one plate-shaped member 1 project from the other plate-shaped member 1. Article 2b
(The back surface of the concave groove 3a) enters, and the two plate-shaped members 1 approach each other.

As a result, the heat transfer medium flowing through the passage (the space inside the heat exchanger element 10) 11 formed by the two plate-like bodies 1 flows in a meandering manner, and the disturbance effect occurs. In addition, since the dead water area is greatly reduced, the heat transfer efficiency is improved. Further, the widthwise dimension of the heat exchanger element 10 can be reduced as much as the two plate-like members 1 approach, thereby reducing the size of the heat exchanger element 10 and the size of the vertical multi-plate heat exchanger 20. Can be. The amount of the size reduction is determined by the amount of heat transfer medium flowing down the passage.

In the heat exchanger element 10 obtained as described above, the large projections 4 of one plate-like body 1 and the small projections 5 of the other plate-like body 1 are located at exactly corresponding positions. And face each other back to back. For this reason, the relatively large-diameter space 12 is formed in the passage 11 formed by the two plate-like bodies 1.
Are formed, which also promotes the disturbing effect of the heat transfer medium.

Next, the vertical multi-plate heat exchanger of the present embodiment shown in FIGS. 14 to 21 will be described. The vertical multiple-plate heat exchanger 20 of the present embodiment is formed by placing a plurality of the heat exchanger elements 10 obtained as described above in the same posture, overlapping them, and joining them.

When a plurality of heat exchanger elements 10 are placed in the same position and superimposed, each adjacent heat exchanger element 10
The competitors form flat surfaces 6a, 7a around the openings 6, 7 at both ends of the plate 1 forming one of the heat exchanger elements 10.
The flat surfaces 7a, 6a around the openings 7, 6 at both ends of the plate-shaped body 1 forming the other heat exchanger element 10 are brought into contact with each other, and the one heat exchanger element 10 is formed. The large projections 4 and small projections 5 of the plate-shaped body 1 to be contacted are respectively brought into contact with the small projections 5 and large projections 4 of the plate-shaped body 1 forming the other heat exchanger element 10 (FIG. 17, FIG. 18 and 20) are superimposed.

In the state where the two adjacent heat exchanger elements 10 are overlapped in this way and the entire heat exchanger is temporarily assembled, the brazing is performed, and then, each of the abutting portions is contacted. The part is fixed, the vertical multi-plate heat exchanger
20 is completed.

In the vertical multi-plate heat exchanger 20 completed in this manner, each of the concavities and convexities (the concave grooves 3a and the protruding grooves 3a) of the two plate-like bodies 1 facing the two adjacent heat exchanger elements 10 is also provided. Article 2a)
Are shifted by exactly 1/2 pitch (see FIGS. 17 and 18). For this reason, the concave grooves 3a and the ridges 2a of the two plate-shaped members 1 and 1 no longer face each other, and the ridges 2a of the other plate-shaped member 1 are connected to the concave grooves 3a of the one plate-shaped member 1. After entering, both plate-like bodies 1, 1 are approaching.

As a result, the heat transfer flowing through the passage formed by the two plate-like bodies 1, that is, the space (space outside the heat exchanger element 10) 21 between two adjacent heat exchanger elements 10. Most of the medium flows in a meandering manner, and its disturbing effect occurs, and the dead water area is greatly reduced, so that the heat transfer efficiency is improved.

Also, as much as the two plate-like bodies 1, 1 approach,
The dimension in the width direction between the two heat exchanger elements 10, 10 can be reduced, and from this aspect as well, the vertical multi-plate heat exchanger 20 can be downsized. The amount of the size reduction is determined by the amount of heat transfer medium flowing down the passage.

The dimension in the width direction between the two heat exchanger elements 10, 10 can be adjusted by adjusting the length of each of the large projection 4, the small projection 5, and the flat surfaces 6a, 7a. Thereby, it is possible to set the dimension in the width direction between the two heat exchanger elements 10, which can reduce the flow resistance of the heat transfer medium. Further, the structural strength of the heat exchanger 20 can be improved by the contact and fixation of the large projection 4 and the small projection 5 between the two heat exchanger elements 10 and 10 as described above.

The vertical multiple plate heat exchanger 20 completed as described above is used, for example, as an absorber or an evaporator in an absorption refrigerator. In particular, when the heat transfer medium is a fluid containing a plurality of components having different boiling points, it is suitably used as a heat exchanger for heat transfer operations such as evaporation, condensation, regeneration, fractionation, concentration, and absorption of the fluid. You.

When used as an absorber, the absorbing liquid
The space 21 between the adjacent heat exchanger elements 10 is caused to flow down. In this way, the absorbing liquid is transferred to the grooves 3 formed in the plate-like body 1 of each heat exchanger element 10 defining the space 21.
Therefore, even if it absorbs the refrigerant vapor and becomes a two-component fluid, a uniform film thickness is formed by the two-dimensional curvature groove shape of the concave groove 3a. Since good heat transfer is performed on the entire surface of the heat transfer wall,
Heat transfer efficiency is improved.

In this case, the cooling water flows through the inlet passage 22 and the outlet passage 23 formed at the lower and upper portions by connecting the openings 6 and 7 of the plate-like body 1 and the passage 11 in the heat exchanger element 10. Swept away. When used as an evaporator, the refrigerant liquid flows into the space 21 between the adjacent heat exchanger elements 10 and flows down, and the brine flows through the passage 11 between the heat exchanger elements 10.

Since the present embodiment is configured as described above, the following effects can be further obtained. The irregularities formed on both surfaces of each plate 1 forming the heat exchanger element 10 are continuous or intermittent in the width direction of the plate 1 and extend straight and parallel to the ridges 2a, the grooves 3a, Since the ridges 2b and the grooves 3b are formed and the planar shape is not corrugated, the heat transfer medium flowing down the space between the respective elements 10 does not tend to gather at a specific location (FIG. 1).
6C), the heat transfer wall surface does not have a non-wetting portion, thereby improving heat transfer efficiency.

Further, since two types of projections, large projections 4 and small projections 5, are provided on both sides of the center line CL in the longitudinal direction of the plate-like body 1, it is possible to distinguish the upper and lower sides of each plate-like body 1. It will be easier.
As a result, when forming the heat exchanger element 10, it is easy to reverse the upper and lower ends of one of the two plate-like bodies 1 with the upper and lower ends of the other plate-like body 1. Become. Further, when the heat exchanger elements 10 are overlapped and brazed to form the vertical multiple-plate heat exchanger 20, the brazing portion between the large projection 4 and the small projection 5 Since the wax is easily wrapped around, their adhesion is made stronger.

Furthermore, since the two plate-like members 1 forming the heat exchanger elements 10 are sealed together along the flat surface 8 on the peripheral edge thereof, they are formed in the space inside each heat exchanger element 10. Can be reliably separated from the heat transfer medium passage 21 formed in the space between the heat exchanger elements 10, and one heat transfer medium can be separated from the other heat transfer medium. Leakage to the side can be reliably prevented. Further, thereby, the structural strength of the heat exchanger 20 can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a plate-like body which is a basic constituent member of a vertical multi-plate heat exchanger according to an embodiment of the present invention described in claims 1 to 7 of the present application.

FIG. 2 is a longitudinal sectional side view taken along line II-II of FIG.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a vertical sectional side view taken along line IV-IV of FIG. 3;

FIG. 5 is a vertical sectional side view taken along line VV in FIG. 1;

FIG. 6 is a vertical sectional side view taken along the line VI-VI of FIG. 1;

FIG. 7 is a longitudinal sectional side view taken along line VII-VII of FIG. 1;

FIG. 8 is a longitudinal sectional side view taken along line VIII-VIII of FIG. 1;

FIG. 9 is a vertical sectional side view taken along line IX-IX of FIG. 1;

FIG. 10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a cross-sectional view taken along line XI-XI in FIG.

FIG. 12 is a cross-sectional view taken along line XII-XII of FIG. 1;

FIG. 13 is a partial vertical sectional side view of an element of the vertical multi-plate heat exchanger in the embodiment of FIG. 1, viewed from the same position as in FIG. 4;

14 is a front view of the vertical multi-plate heat exchanger in the embodiment of FIG. 1, which is a perspective view of a front surface of a second plate-like body from the near side.

FIG. 15 is a vertical sectional side view taken along line XV-XV of FIG. 14;

FIG. 16 is a partially enlarged view of FIG. 14;

FIG. 17 is a vertical sectional side view taken along line XVII-XVII in FIG. 16;

FIG. 18 is a partial vertical sectional side view taken along line XVIII-XVIII in FIG. 14;

FIG. 19 is a partial vertical sectional side view taken along line XIX-XIX in FIG. 14;

FIG. 20 is a partial cross-sectional side view taken along line XX-XX in FIG. 14;

21 is a partial cross-sectional side view cut along the line XXI-XXI in FIG. 14;

FIG. 22 is a diagram showing a conventional example.

FIG. 23 is a diagram showing another conventional example.

FIG. 24 is a view showing still another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plate-like body, 2a, 2b ... Protrusion, 3a, 3b ... Concave groove, 4
... Large protrusion, 5 ... Small protrusion, 6 ... Opening, 6a, 6b ... Flat surface, 7 ... Opening, 7a, 7b ... Flat surface, 8 ... Flat surface, 10 ...
Heat exchanger element, 11 passage, 12 space, 20 vertical multi-plate heat exchanger, 21 space (passage), 22 inlet passage, 23 outlet passage, A, B surface.

Continuing from the front page (72) Inventor Toshimitsu Takaishi 1-4-1 Chuo, Wako-shi, Saitama Prefecture Inside Honda R & D Co., Ltd. (72) Inventor Shoji Isshiki 2-29-6 Keido, Setagaya-ku, Tokyo (72 ) Inventor Sakai Taiyo 3-25-3 Yoyogi, Shibuya-ku, Tokyo Toyo Radiator Co., Ltd. (72) Inventor Shinchi Nimura 3-25-3 Yoyogi, Shibuya-ku, Tokyo Toyo Radiator Co., Ltd. (72) Invention Toshi Wada Tsutomu 3-25-3 Yoyogi, Shibuya-ku, Tokyo Toyo Radiator Co., Ltd.

Claims (7)

[Claims] 1. A plurality of elements formed by superposing two elongated plate-like bodies each having an uneven surface on both sides are vertically stacked with their longitudinal direction being up and down. In a vertical multi-plate heat exchanger in which a space is a passage through which one heat transfer medium passes and a space between the elements is a passage through which the other heat transfer medium passes, An opening is formed at each of both ends in the longitudinal direction, and a flat surface is formed around the opening, and on one surface of the plate-like body, at least as high as the projections of the irregularities provided on the surface. However, on the other surface, flat surfaces recessed to the same depth as at least the concave portions of the irregularities applied to the surface are respectively formed, and the irregularities are equally spaced alternately in the longitudinal direction of each plate-like body. Arranged in parallel and continuous or intermittent in the width direction The concave groove is formed by a straight groove and a ridge, and the concave groove has a cross-sectional shape of a concave groove corresponding to the concave and convex concave portion formed on one surface of each of the plate-like bodies, and has an equal two-dimensional curvature. The device is formed in a groove shape, and the elements are formed so as to overlap each other with one surface of each of the two plate-shaped members facing outward and the other surface facing inward. A vertical multi-plate heat exchanger characterized in that the flat surfaces that have been made to contact each other are overlapped and connected. 2. The vertical multi-plate system according to claim 1, wherein the two plate-like bodies are overlapped with each other with the pitch of the unevenness of each plate-like body shifted by １ ／ pitch. Heat exchanger. 3. The unevenness arranged in the longitudinal direction of each plate-like body is such that the center line of the entire width of the arrangement is 1/4 of the pitch of the unevenness with respect to the longitudinal center line of the plate-like body. 3. The vertical multiple plate heat exchanger according to claim 2, wherein the heat exchangers are arranged shifted by a pitch. 4. The vertical multi-plate heat exchanger according to claim 1, wherein a spacing holding projection is provided on one surface of each of said plate-like bodies. . 5. The projection for maintaining spacing includes two types of projections: a large projection on one side in the longitudinal direction from a longitudinal center line of the plate-like body and a small projection on the other side.
The vertical multi-plate heat exchanger according to claim 4, wherein the large projections and the small projections are provided at positions symmetrical with respect to a longitudinal center line of the plate-shaped body. 6. The method according to claim 1, wherein the irregularities, openings, protruding flat surfaces, recessed flat surfaces, and spacing maintaining projections formed or provided on each of the plate-like bodies are simultaneously formed by press working. The vertical multi-plate heat exchanger according to claim 4 or 5, wherein 7. The vertical multi-plate type according to claim 1, wherein the two plate-like members forming the element are sealed from each other along the periphery thereof. Heat exchanger.