JPH10206063A - Multiplate type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the medium supply structure for the passage between respective elements of a multiplate type heat-exchanger. SOLUTION: A plurality of elements 10, each comprising a laminate of two planar bodies 1 provided with irregularities on the opposite sides thereof, are laminated wherein the inner space of each element serves as an inner-element medium passage 12 for passing one heat transfer medium whereas the space between respective elements serves as an inter-element medium passage 14 for passing the other medium. Parts 8 stretching toward the outside of the element 10 are provided at the opposite upper edge parts of two planar bodies 1 forming the element 10 in order to define a medium passage 13 extending along the upper edge parts of the element 10. Furthermore, a plurality of ports 9 communicating between the inside of the medium passage 13 and the inter- element medium passage 14 on the outside are formed while being arranged along the upper edge parts at each stretching part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of superposing a plurality of elements formed by laminating two plate-like bodies each having an uneven surface on both sides, and arranging a space inside each element on one side of a heat transfer medium. The present invention relates to a multi-plate type heat exchanger in which a passage for passing the other medium is used as a passage for passing the other medium.

[0002]

2. Description of the Related Art The above-mentioned multi-plate heat exchanger is well known in the prior art. However, in the conventional multi-plate heat exchanger, since the passages thereof are flat and parallel, the medium flowing through the passages has a small diameter. In order to solve these problems, a plate-type heat exchanger as described in JP-B-56-52223 has been proposed because reliable stirring cannot be performed and high thermal efficiency cannot be obtained. ing.

This plate-type heat exchange device is a counter-current type heat exchanger in which two heat transfer media flow in opposite directions in parallel with each other, and is formed at a central portion of each plate in a direction intersecting the flow direction of the medium. Are formed alternately in a row, so that a passage extending in a meandering manner in the flow direction of the medium is formed inside each element and between the elements, and is formed along the path. The medium is satisfactorily stirred by flowing the medium.

[0004] On both sides of the central portion of each plate, distribution bands are formed in which waveforms extending in a direction perpendicular to the waveform of the central portion are formed. A passage communicating with the medium passage inside the element;
A passage communicating with a medium passage between the elements is defined, and these passages are respectively connected to a circulation circuit of each medium.

[0005]

In the above-mentioned conventional plate-type heat exchanger, each of the external media circuits corresponding to the medium flowing inside each element and the medium flowing between the elements corresponds to each of the distribution bands at both ends. The connection structure must be complicated because the connection must be made to communicate with the passage.

Accordingly, the present invention aims to simplify the medium supply structure for the passages between the respective elements in the above-mentioned plate type heat exchanger, thereby simplifying the entire apparatus and reducing the cost.

[0007]

For this reason, according to the present invention, a plurality of elements formed by laminating two plate-like bodies having irregularities on both surfaces are superimposed on each other to form a space inside each element. Is a passage for passing one of the heat transfer media, and a space between the respective elements is a passage for passing the other medium. By providing portions protruding toward the outside of the element at the upper edges facing each other,
A medium passage extending along the upper edge is formed at the upper edge of the element, and a plurality of communication ports penetrating the portion are formed along the upper edge at the projecting portion of each plate-like body. I do.

According to the present invention, when a medium is supplied to a medium path formed along the upper edge of each element from any place of the path, the medium flows along the medium path and the entire upper edge is supplied. And flows out of the element through a plurality of communication ports arranged along the upper edge, and is uniformly distributed along the outer surface of the element, that is, the wall surface of the inter-element passage.

Thus, in the passage between the respective elements, there occurs a flow of the medium flowing down while being uniformly distributed along the wall surface, and the medium flows through the inner wall of the opposite element through the wall surface. The medium passage along the upper edge necessary to produce such an effect is formed by pressing the projecting portions on the upper edges of the two plate-like members forming the element. Etc., and at that time, if the plurality of communication ports are processed in the overhang portion at the same time,
Since these two plate-like bodies are formed without any other means by overlapping, the formation is extremely easy, and the production cost is also low.

[0010] The medium passage along the upper edge may be a groove having an upward opening. In this case, one or several medium supply pipes are arranged above the heat exchanger in which a large number of elements are arranged in a direction intersecting these elements, and each of the medium supply pipes in the supply pipe is provided. The medium is dropped from the holes provided at the upper positions of the passages and supplied to the respective medium passages.

The medium is evenly dispersed by the medium passage and the plurality of communication ports and guided to the inter-element passage, so that a spray or the like for dispersing the medium is not required.
In addition, the number of the medium supply pipes may be small, and the size of the apparatus can be reduced.

The medium passage may have a closed cross section. In this case, a medium supply pipe is provided which connects the medium passages at the upper edges of the arrayed elements, for example, at one end in a perpendicular direction, and supplies the medium to the medium passages through the supply pipes. Also in this case, since spraying or the like is not required, the number of parts can be reduced and the size of the apparatus can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view showing an embodiment of a plate-like body which is a basic component of a multi-plate heat exchanger according to the present invention, and FIG. FIG. 3 is a longitudinal sectional view taken along the line II-II of FIG. 1, and FIG.
It is a cross-sectional view along a line.

On both surfaces of the plate-like body 1, a corrugated pattern is formed on the entire surface of the central portion except for both end portions. The concave-convex pattern is formed by pressing concave grooves 2, 2,... On a surface (hereinafter, referred to as surface A; see FIG. 2) on the side shown in FIG. Has a planar shape of a continuous waveform in the width direction of the plate-like body 1, such concave grooves 2 are arranged at equal intervals in the longitudinal direction of the plate-like body 1, and the adjacent concave grooves 2 and 2 Between the ridges 3 also have a similar waveform
It has become.

The portion where the concave groove 2 is formed on the surface A is projected outward on the back surface B (see FIG. 2) to form a ridge 3b having the same shape as the concave groove 2. The portion corresponding to the ridge 3 is a concave groove 2b on the surface B.

Openings 4 are punched at both ends in the longitudinal direction of the plate 1. The peripheral portions of the openings 4 are formed into a flat surface 5 that is recessed on the surface A and a protruded flat surface 6 on the surface B by pressing simultaneously with the groove 2 (FIG. 2). ).

One edge 7 of the plate 1 along the longitudinal direction
(Because this edge is a portion located above when the plate-shaped body 1 is disposed in the heat exchanger, the edge is hereinafter referred to as an upper edge.) An overhang portion 8 is formed. In the present embodiment, as shown in FIG. 3, the overhang portion 8 includes a bottom plate portion 8a which is bent at the upper edge portion 7 from the reference surface portion 1a of the plate-like body 1 and projects toward the B surface, A side plate portion 8b which is bent at the outer edge of the portion 8a and rises upward in parallel with the reference surface portion 1a.

Further, the side plate portion 8b of the overhang portion 8 is formed.
A large number of communication ports 9 are provided at regular intervals along the side plate portion so as to penetrate the side plate portion and directly communicate both surfaces thereof. In this embodiment, the communication port 9 is provided with the side plate portion 8b.
Is formed by cutting in an inverted triangular shape from the upper edge to the bottom plate portion 8a (see FIG. 6).

The multi-plate heat exchanger of the present invention is constructed by combining a number of plate-like bodies 1 having the above-mentioned shapes.

First, the two plate-shaped members 1 are superimposed on each other so that the surfaces A face each other, thereby forming the element 10 (FIGS. 4 and 5) of the multi-plate heat exchanger. The two plate-like bodies 1, 1 are sealed by brazing or the like by bringing the reference surface portions 1a on the periphery into contact with each other. Inside the element whose peripheral edge is sealed in this way, a cavity 11 is formed by opposing the concave flat surface 5 of each plate-like body 1 at both ends. The recessed groove 2 of each plate-shaped body 1 between the cavities 11 at both ends forms an element inner medium passage 12 communicating with the cavities 11, 11. One of the heat transfer media flows through the element inner medium passage 12 to 11.

Further, the element 10 thus formed is
As shown in FIGS. 5 and 6, the upper edge of the
The overhanging portions 8, 8 face each other to form an upwardly open groove-shaped medium passage 13 extending along the upper edge. Since the bottom plate portions 8a of the projecting portions 8, 8 on both sides are connected to each other in a liquid-tight manner by brazing the reference surface portion, the medium passage 13 does not communicate with the internal element inner medium passage 12. , And a passage independent of the passage 12. As will be described later, another medium flowing between the elements is supplied to the medium passage 13.

A multi-plate heat exchanger is formed by superposing and assembling a large number of the elements 10 as described above. FIGS. 4 and 5 show two adjacent elements assembled together.
10 is shown in the same cross section as FIGS. Each element 10 is fixed by brazing by abutting the flat surfaces 6 protruding outward, so that the voids 11 of each element 10 are fluid-tightly communicated through the opening 4 and An introduction passage and an outlet passage for the first medium flowing through the medium passage 12 are formed.

As described above, the projecting flat surfaces 6 of the adjacent elements 10 are brought into contact with each other to form an inter-element medium passage 14 between the two elements 10, and the medium passage 14 is provided above the inter-element medium passage 14. 13 communicates through the communication port 9. In the present embodiment, the gap 15 is formed between the projecting portions 8 and 8 by making the projecting amount of the projecting portion 8 smaller than the projecting amount of the flat surface 6.

The second medium flowing through the inter-element medium passage 14 is supplied to the medium passage 13 from an upper opening. The medium flows along the medium passage 13 and spreads over the entire medium. Flows into the outside of the element 10, that is, into the inter-medium medium passage 14, through a number of communication ports 9 arranged and arranged along the outer surface of the element 10 forming the wall surface of the inter-medium medium passage 14. Since it flows down in a dispersed state, efficient heat transfer is performed between the element inside medium passage 12 and the first medium flowing along the opposite side of the wall surface.

Thus, the medium passage 13 is provided at the upper edge of the two plate-like members 1 forming the element 10, respectively.
Is formed by pressing or the like, and at this time, if a plurality of communication ports 9 are formed in the overhanging portion 8 at the same time, the two plate-shaped members 1 can be easily formed by overlapping each other. It is very easy to form, and therefore, the production cost is low.

FIG. 7 shows a large number of plate-like members 1 as described above.
FIG. 3 is a perspective view showing a heat exchanger 16 configured by superimposing. This heat exchanger 16 is particularly excellent as an absorber for an absorption refrigerator or a heat exchanger for an evaporator. In FIG. 7, the flow of each medium when this is applied to the above absorber is shown by arrows.

As is well known, in the absorber of the absorption refrigerator, the refrigerant vapor which evaporates in the evaporator and cools the brine to increase the refrigeration effect and becomes a low-pressure gas, and the refrigerant evaporates the refrigerant in the generator to obtain the refrigerant concentration And a cooling water for removing heat of absorption generated by the former being absorbed by the latter.

In the heat exchanger 16 installed in the absorber, the refrigerant vapor A descends from above, and passes through the gaps 15 formed between the medium passages 13 of the respective elements 10 to inter-elements. It enters the medium passage 14 and flows down in the passage.

Above the heat exchanger 16, one medium supply pipe 17 is provided.
Are arranged in a direction crossing each element 10,
The absorbing liquid B from the generator is introduced into the absorber through the medium supply pipe 17. A nozzle 18 is provided downward at a position corresponding to the medium passage 13 of each element 10 in the medium supply pipe 17, and the absorbing liquid B flows into each medium passage 13 from the medium supply pipe 17 through each nozzle 18. Fall.

Then, as described above, the absorbing liquid flows along the medium passage 13 and spreads over the entirety thereof, and at the same time, flows into the inter-element medium passage 14 through the plurality of communication ports 9 and flows down in the passage. (Both ends of the medium passage 13 are appropriately closed). During this time, the refrigerant contacts and absorbs the refrigerant vapor A flowing into the passage from the gap 15. The absorbing liquid is evenly distributed on the wall surface of the inter-element medium passage 14, that is, on the outer surface of the element 10, and flows down while being stirred by passing through the concave groove 2 and the ridge 3 of the plate-like body 1. It comes into good contact with steam and absorbs it efficiently.

In the element inner medium passage 12 formed inside each element 10, cooling water C for removing the heat of absorption generated by the above-mentioned absorption flows. As aforementioned,
At both ends of the heat exchanger 16, an inlet passage 19 and an outlet passage 20 are formed which connect the voids 11 of each element 10 in a liquid-tight manner, and the cooling water C flowing into the introduction passage 19 It is distributed to the element inner medium passage 12, flows through the passage toward the outlet passage 20, and flows out of the outlet passage 20. During this time, heat exchange is performed with the absorbing liquid B flowing through the inter-element medium passage 14 via the plate-like body 1.

The medium, that is, the absorbing liquid B, supplied dropwise from the medium supply pipe 17 to each medium passage 13 is evenly distributed by the medium passage 13 and the plurality of communication ports 9 and guided to the inter-element medium passage 14. Therefore, it is not necessary to provide a spray or the like for distributing the absorbent B, and it is not necessary to provide a large number of medium supply pipes 17 along the medium passage 13, and only one or a very small number of medium supply pipes are required. In addition, the size of the device can be reduced.

When the heat exchanger 16 is applied to an evaporator,
In each element inner medium passage 12, brine is circulated from the introduction passage 19 to the outlet passage 20.
The coolant is supplied through a nozzle 17, a nozzle 18, and a medium passage 13, and the refrigerant liquid cools the brine by removing heat of evaporation from the brine. Refrigerant vapor generated in the inter-element medium passage 14 by evaporation of the refrigerant liquid and rising through the gap 15 is guided to the absorber.

The medium passage 13 in the above-described embodiment is formed in a groove shape that is open upward by the protruding portion 8 having a mountain-shaped cross section formed along the upper edge of each plate-like body 1. Alternatively, as shown in FIG. 8, a medium passage 21 having a closed cross section may be provided at a position slightly lower than the upper edge 7a of the upper edge 7 of the element 10.

The medium passage 21 is formed by pressing a concave groove having a semicircular cross-section at the upper edge of the plate 1 leaving a reference surface portion 1a at the top and bottom. It is formed by bringing the surface portions 1a into contact with each other and overlapping them. A large number of communication ports 22 formed of circular holes are arranged in the concave groove.

FIG. 9 is a perspective view schematically showing a heat exchanger 23 formed by superposing the elements 10 of FIG. As can be seen from the figure, the medium passage 21 does not extend to the left and right ends of the element 10, but is closed at both ends, and a medium supply port 24 is provided at one end. And the medium supply port of each element 10
24 have the same configuration as the space 11 in FIG. 4 and communicate with each other.

When this heat exchanger 23 is applied to an absorber, the refrigerant vapor is introduced into the inter-element medium passages 14 through the upper openings 25 as in the case of the heat exchanger 16, but is absorbed. The liquid B is supplied to each of the medium passages 21 through the medium supply pipe 24, and dispersed and flows into the inter-element medium passage 14 through the communication port 22. Cooling water C flows through the element inner medium passage 12 as in the case of the heat exchanger 16.

Also in this embodiment, since spraying or the like is not required, the number of parts can be reduced and the size of the apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a plate-like body according to an embodiment of the present invention, which is partially cut on one surface.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view showing two adjacent elements formed by superposing the plate-like bodies of FIG. 1 along a cross section similar to FIG. 2;

FIG. 5 is a cross-sectional view of the element of FIG. 4 cut along a cross section similar to FIG. 3;

FIG. 6 is a partial perspective view of an element formed by superposing the plate-like bodies of FIG. 1;

FIG. 7 is a perspective view showing a heat exchanger formed by superposing the elements of FIG. 6;

FIG. 8 is a partial perspective view of an element according to another embodiment of the present invention.

FIG. 9 is a perspective view showing a heat exchanger formed by stacking the elements of FIG. 8;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plate-like body, 2 ... Concave groove, 3 ... Protrusion, 4 ... Opening, 5 ... Flat surface, 6 ... Flat surface, 7 ... Upper edge, 8 ... Overhang, 9 ...
Communication port, 10… Element, 11… Vacancy, 12… Element media passage,
13 medium passage, 14 medium passage between elements, 15 gap, 16 heat exchanger, 17 medium supply pipe, 18 nozzle, 19 introduction passage,
Reference numeral 20: outlet passage, 21: medium passage, 22: communication port, 23: heat exchanger, 24: medium supply port, 25: opening.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinchi Shinmura 3-25-3 Yoyogi, Shibuya-ku, Tokyo Toyo Radiator Co., Ltd. (72) Inventor Toru Fukuda 1-4-1 Chuo, Wako-shi, Saitama Stock Inside Honda R & D Co., Ltd. (72) Inventor Kazuma Ichikawa 1-4-1 Chuo, Wako City, Saitama Pref. Inside Honda R & D Co., Ltd.

Claims (3)

[Claims] 1. A plurality of elements formed by laminating two plate-like bodies having irregularities on both sides thereof,
In a multi-plate heat exchanger, the space inside each element is a passage for passing one of the heat transfer media and the space between each element is a passage for passing the other medium. Forming a medium passage extending along the upper edge at the upper edge of the element by providing a portion protruding toward the outside of the element at each of the upper edges of the plate-like bodies facing each other; A multi-plate heat exchanger, wherein a plurality of communication ports penetrating the protruding portion of each plate-like body are formed along the upper edge portion. 2. The multi-plate heat exchanger according to claim 1, wherein said medium passage has a groove shape opened upward. 3. The multi-plate heat exchanger according to claim 1, wherein said medium passage has a closed cross-sectional shape.