JP2008185224A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin heat exchanger of high pressure resistance and a simple structure in which a plurality of fluids are circulated. <P>SOLUTION: An element 4 is constituted by integrally joining a first plate 1 and a second plate 2 respectively provided with groove portions 10 arranged in parallel with each other at constant intervals, a number of tube portions 3 are formed on positions of the groove portions 10, openings 5 are formed at both longitudinal end portions, first tanks 6 and second tanks 7 are fitted to flat surfaces of the element 4 by every row of the openings 5, the first fluid 8 is circulated between the pair of first tanks 6, and the second fluid 9 is circulated between the second tanks 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a high pressure resistant heat exchanger having a remarkably small thickness, a simple structure and good heat exchange performance.

A pressure-resistant structure in which a pair of plates having serpentine grooves are overlapped so that each groove faces each other to form a core, the serpentine grooves form a tube portion, and other flat portions are joined together. High heat exchangers are known. And the heat exchanger which distribute | circulates the refrigerant | coolant and water of a gas-liquid two-layer state in the inside, and distribute | circulates to-be-cooled gas or combustion gas to the outer surface side is known.
Further, the present applicant has proposed a heat exchanger in which the partition plates are joined so as to be sandwiched between a pair of plate-like plates and different fluids are circulated on both sides of the partition plate as Patent Document 1 below. This heat exchanger is provided with a pair of first tank portion and second tank portion on both surfaces of both ends of the partition plate.

JP 2006-145148 A

The former heat exchanger with a relatively high pressure resistance circulates the liquid through the flow path of the plate formed in a meandering shape, and circulates the gas on the outer surface side of the plate. Only one fluid flows in the plate. It is something that cannot be made.
Moreover, the heat exchanger described in the above-mentioned Patent Document 1 circulates two fluids between a pair of flat channels sandwiching a partition plate, and has a drawback that the pressure resistance cannot be kept high due to the structure. . Along with that, we needed three plates.
Accordingly, the present invention provides a heat exchanger having a high pressure resistance with a simple structure in which a heat exchanger core is formed by two plates and two fluids can be independently circulated therein. Let it be an issue.

The present invention as set forth in claim 1 includes a pair of a first plate (1) and a second plate (2) in which a plurality of grooves (10) are arranged in parallel on at least one side. Both plates (1) and (2) are overlapped so as to face the plate, and the planes are joined to each other except for the groove (10), and each groove (10) has a number of tube portions (3). A plate-like element (4) comprising
Openings (5) provided in two rows in each tube part (3) at both ends of each tube part (3) and at different planes or positions between adjacent tube parts (3),
At both ends of the element (4), the openings (5) in each row communicate with each other so that the openings (5) communicate with each other. A tank (6) and a second tank (7),
A first fluid (8) flows between one pair of the first tanks (6) through the tube portions (3), and a second fluid flows between the other pair of second tanks (7). It is a heat exchanger configured to allow fluid (9) to circulate.

The present invention according to claim 2 is the method according to claim 1,
Each of the first plate (1) and the second plate (2) has a groove (10) and is displaced in the plane direction so that the grooves (10) of both plates (1) and (2) do not overlap. The planes of the plates (1) and (2) are joined to each other to form the element (4), the first tube portion (3a) is formed on the first plate (1) side, and the second plate ( 2) The second tube part (3b) is formed on the side,
The opening (5) is provided at both ends of each tube portion (3a) (3b),
On the plane of the element (4), a pair of the first tanks (6) are provided in the openings (5) at both ends of the first tube portion (3a), and the two ends of the second tube portion (3b) are provided. The heat exchanger is provided with a second tank (7) in the opening (5).

The present invention according to claim 3 provides the method according to claim 1,
In the same plate, the upper opening (5a) and the lower opening (5b) are formed in two rows so as to be different from each other in the longitudinal direction between the adjacent tube portions (3) in the longitudinal direction. And a heat exchanger having an upper first tank (6a) communicating with the upper openings (5a) and a lower first tank (6b) communicating with the lower openings (5b).
The present invention according to claim 4 is a heat exchanger in which different fluids flow through the upper first tank (6a) and the lower first tank (6b).

The present invention according to claim 5 provides the method according to any one of claims 1 to 4,
The groove portion (10) is formed up to both edges of the first plate (1) and the second plate (2), and both ends of the tube portion (3) of the element (4) are opened to the edges, and the open ends thereof Is closed by one side wall of the tanks (6) and (7), and a notch (13) provided on the other side wall is aligned with the outer periphery of the tube part (3), and the alignment part is liquid-tight. It is a heat exchanger closed by

A sixth aspect of the present invention provides the method according to any one of the first to fourth aspects,
The groove portions (10) of the first plate (1) and the second plate (2) have closed portions (10a) which are closed in advance at both ends thereof, and the edges of the plates (1) and (2) are flat. Both ends of the tube portion (3) of the element (4) are closed, and a notch (13) provided on the side wall of the tank (6) (7) is formed on the outer periphery of the tube portion (3). It is a heat exchanger in which the matching portion is liquid-tightly closed in alignment.

In the heat exchanger of the present invention, a pair of first plate 1 and second plate 2 are overlapped to constitute an element 4 having a large number of tube portions 3, and each row of openings provided at both ends of the element 4. Since a pair of first tank 6 and second tank 7 are attached on the plane of the element 4 so as to allow different fluids to flow through them, the flat element 4 is saved in a space-saving manner. Heat exchange can be performed directly between the two fluids.
In addition, since the element 4 is formed by joining the flat surfaces of the pair of first plate 1 and second plate 2, it is possible to provide a heat exchanger having a very simple structure, high pressure resistance and high heat exchange performance. Further, each tank 6, 7 is located on the plane of the element 4, and liquid tightness with the element 4 can be easily secured.

  In the above configuration, the groove portion 10 is formed in each of the first plate 1 and the second plate 2, the first tube portion 3a is formed on the first plate 1 side, and the second tube portion 3b is formed on the second plate 2 side. In this case, the first tank 6 and the second tank 7 are respectively provided on the front surface side and the back surface side of the first plate 1, and different fluids are allowed to flow through them, and the two fluids are directly connected in the planar element 4. The heat exchange can be performed. In this case, the tanks 6 and 7 can be easily attached.

  In the above configuration, the upper plate 5a and the lower plate 5b, which are different from each other in the longitudinal direction, are formed in two rows between the adjacent tube portions 3 on the same plate, and the upper first tank 6a and the lower first tank 6b are provided on them. be able to. In this case, heat exchange can be performed by circulating a plurality of fluids on the surface side of the same plate.

  In any one of the configurations described above, both ends of each tube portion 3 are opened at both ends of the element 4, and the open ends are closed by one side wall of the first tank 6 and the second tank 7 and provided on the other side wall. When the notch portion 13 is aligned with the outer periphery of the tube portion 3 and is closed liquid-tightly, the tube portion 3 and each of the first tank 6 and the second tank 7 can be easily connected.

  In any one of the above configurations, when both ends of the groove portion 10 of the first plate 1 and the second plate 2 are previously closed by the closing portion 10a, the liquid tightness between the first tank 6 and the second tank 7 is more easily achieved. Can be formed. Thereby, a heat exchanger with high pressure resistance can be provided.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of an essential part of a heat exchanger showing a first embodiment of the present invention, FIG. 2 is a side view showing the assembled state, and FIG. 3 is a longitudinal sectional view of the heat exchanger. .
In this heat exchanger, the element 4 is composed of a pair of first plate 1 and second plate 2, and each plate has a large number of parallel grooves 10 spaced apart from each other and arranged in parallel at regular intervals. The groove portion 10 of the plate 1 and that of the second plate 2 are displaced from each other by a half pitch position in the planar direction. Then, the first plate 1 and the second plate 2 are brazed and fixed to each other in a liquid-tight manner in the plane except for each groove portion 10.

In the element 4, a first tube portion 3a and a second tube portion 3b are formed in the groove portion 10 of each plate. Openings 5 are provided at both ends in the longitudinal direction of the tube portion 3 by cutting or the like. The opening 5 may be opened when the first plate 1 and the second plate 2 are formed in advance. Alternatively, the opening 5 may be opened by brazing between the two. Although the opening of this example leaves a part of the groove 10, the entire groove may be removed by cutting or the like.
As an example, the tube portion 3 of the element 4 thus formed can have a height of 1 mm or less and a pitch of several mm or less. The lower the height, the higher the pressure resistance. The first plate 1 and the second plate 2 are integrally brazed and fixed at a flat portion other than the tube portion 3.

  Next, a pair of a first tank 6 and a second tank 7 are fitted on both flat surfaces of the element 4 at both ends of the surface of the first plate 1 and the second plate 2, respectively. Each tank 6, 7 is formed in a box shape with one side open, and a notch 13 is formed on one of the elongated side surfaces at a pitch interval of the tube portion 3 of the first plate 1. Similarly, a notch 13 is also formed in the second tank 7. Then, the first tank 6 and the second tank 7 are fitted on both end portions of both surfaces of the element 4. At this time, the notch 13 is aligned with the outer periphery of each tube 3. The other elongated side walls of the first tank 6 and the second tank 7 close the openings at the upper end and the lower end of each tube portion 3 and are joined together by welding or brazing.

  An inlet pipe 11 and an outlet pipe 12 are connected to the first tank 6 and the second tank 7, and the whole is joined as shown in FIGS. On the first plate 1 side, the first fluid 8 flows from the inlet pipe 11 into the first tank 6 positioned at the upper part, flows into the lower first tank 6 via the first tube portions 3a, and exits. It flows out of pipe 12. On the second plate 2 side, the second fluid 9 flowing into the lower second tank 7 from the inlet pipe 11 flows through each second tube portion 3b, and passes through the upper second tank 7 and the outlet pipe 12. To the outside. Heat exchange is performed between the first fluid 8 and the second fluid 9.

  Next, FIGS. 4 and 5 are an exploded perspective view and a side view of the main part of the second heat exchanger of the present invention, and this example is different from that of FIG. A pair of upper openings 5a and lower openings 5b are provided in two rows on each side of the tube portion, and an upper first tank 6a and a lower first tank are provided on the first plate 1 side. 6b is provided in two rows, and an upper second tank 7a and a lower second tank 7b are fitted in two rows on the second plate 2 side.

  In this heat exchanger, as shown in FIGS. 5 and 6, the first fluid 8 and the third fluid 14, which are different fluids, can be circulated through the first tube portions 3 a adjacent on the first plate 1 side. Similarly, on the second plate 2 side, the second fluid 9 and the fourth fluid 15 which are different fluids are circulated through the adjacent second tube portion 3b, and in this example, heat exchange is performed between a total of four fluids. Can do. As an example, in FIG. 5, the first fluid 8 is circulated from the upper lower first tank 6 b to the lower lower first tank 6 b through the alternate first tube portions 3 a adjacent to the lower upper first tank 6 b. The 3rd fluid 14 can be distribute | circulated in each 1st tube part 3a from 1 tank 6a, and it can be made to flow out from upper upper 1st tank 6a.

On the second plate 2 side, the second fluid 9 is allowed to flow out from the upper upper second tank 7a via the second tube portions 3b from the lower upper second tank 7a, and the lower lower second tank 7b. Further, the fourth fluid 15 can be flowed in and can flow out from the lower second tank 7b at the upper part through the second tube portions 3b.
In addition, the heat exchange between three fluids can be performed or the heat exchange between two fluids can be performed by connecting suitable tanks.

  Next, FIG. 7 is an exploded perspective view of the main part showing a third embodiment of the present invention. This example is different from that of FIG. 1 in that each groove 10 of the first plate 1 and the second plate 2 is different. That is, both ends in the longitudinal direction are blocked by the blocking portion 10a. In this example, notched portions 13 are formed on the upper and lower side walls of the first tank 6 and the second tank 7 respectively. The notch 13 is aligned with the outer periphery of the groove 10. The first tank 6 and the second tank 7 are fitted so as to cover each tube portion 3, and the contact portions are integrally brazed or welded.

  In the case of brazing, the first tank 6, the second tank 7, the first plate 1 and the second plate 2 are assembled together and inserted into the furnace in the assembled state, and the contact portions are integrated. Can be brazed and fixed. In addition, after the first plate 1 and the second plate 2 are brazed in advance, an opening 5 is formed in each of the first tube portion 3a and the second tube portion 3b, and then the first tank 6 and the second tank 7 are formed thereon. It is also possible to weld and fix the fitting part integrally.

(Modification)
In the above embodiment, the first tank 6 and the second tank 7 are formed in a box shape with one side open, but instead of this, a rectangular tube is used so that the first tank 6 and the second tank 7 are aligned with the outer periphery of the tube portion 3. Slits are formed on one side at the pitch of the tube part 3, and the slits of the first tank 6 and the second tank 7 are fitted to the hole edge of the opening 5 of the tube part 3, and the fitting parts are integrated. It is also possible to braze or fix by welding.

The principal part disassembled perspective view of the heat exchanger which shows the 1st Embodiment of this invention. The side view which shows the standing state of the group of the same heat exchanger. The longitudinal cross-sectional view of the same heat exchanger. The principal part disassembled perspective view of the heat exchanger which shows the 2nd Embodiment of this invention.

The side view which shows the assembly state of the same heat exchanger. The longitudinal cross-sectional view in the element 4 of the same heat exchanger. The principal part disassembled perspective view of the heat exchanger which shows the 3rd Embodiment of this invention. The longitudinal cross-sectional view which shows the assembly state of the same heat exchanger.

Explanation of symbols

1 First plate 2 Second plate 3 Tube section
3a First tube part
3b Second tube part 4 Element 5 Opening
5a Upper opening
5b Lower opening

6 First tank
6a Upper first tank
6b Lower first tank 7 Second tank
7a Upper second tank
7b Lower second tank

8 First fluid 9 Second fluid
10 Groove
10a Blockage
11 Inlet pipe
12 Outlet pipe
13 Notch
14 Third fluid
15 4th fluid

Claims (6)

A pair of first plate (1) and second plate (2) in which a large number of grooves (10) are arranged in at least one side, both plates (with the inner surface of the groove (10) facing the mating plate ( 1) and (2) are superposed and their flat surfaces are joined to each other except the groove portion (10), and each of the groove portions (10) constitutes a plurality of tube portions (3). When,
Openings (5) provided in two rows in each tube part (3) at both ends of each tube part (3) and at different planes or positions between adjacent tube parts (3),
At both ends of the element (4), the openings (5) in each row communicate with each other so that the openings (5) communicate with each other. A tank (6) and a second tank (7),
A first fluid (8) flows between one pair of the first tanks (6) through the tube portions (3), and a second fluid flows between the other pair of second tanks (7). A heat exchanger configured to allow fluid (9) to circulate. In claim 1,
Each of the first plate (1) and the second plate (2) has a groove (10) and is displaced in the plane direction so that the grooves (10) of both plates (1) and (2) do not overlap. The planes of the plates (1) and (2) are joined to each other to form the element (4), the first tube portion (3a) is formed on the first plate (1) side, and the second plate ( 2) The second tube part (3b) is formed on the side,
The opening (5) is provided at both ends of each tube portion (3a) (3b),
On the plane of the element (4), a pair of the first tanks (6) are provided in the openings (5) at both ends of the first tube portion (3a), and the two ends of the second tube portion (3b) are provided. A heat exchanger having a second tank (7) in the opening (5). In claim 1,
In the same plate, the upper opening (5a) and the lower opening (5b) are formed in two rows so as to be different from each other in the longitudinal direction between the adjacent tube portions (3) in the longitudinal direction. And a heat exchanger having an upper first tank (6a) communicating with the upper openings (5a) and a lower first tank (6b) communicating with the lower openings (5b). In claim 3,
A heat exchanger in which different fluids flow between the upper first tank (6a) and the lower first tank (6b). In any one of Claims 1-4,
The groove portion (10) is formed up to both edges of the first plate (1) and the second plate (2), and both ends of the tube portion (3) of the element (4) are opened to the edges, and the open ends thereof Is closed by one side wall of the tanks (6) and (7), and a notch (13) provided on the other side wall is aligned with the outer periphery of the tube part (3), and the alignment part is liquid-tight. A heat exchanger that is blocked. In any one of Claims 1-4,
The groove portions (10) of the first plate (1) and the second plate (2) have closed portions (10a) which are closed in advance at both ends thereof, and the edges of the plates (1) and (2) are flat. Both ends of the tube portion (3) of the element (4) are closed, and a notch (13) provided on the side wall of the tank (6) (7) is formed on the outer periphery of the tube portion (3). A heat exchanger in which the matching portion is liquid-tightly closed in alignment.

Images