JP4340952B2 - Plate type heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate-type heat exchanger in which plate-shaped metal plates (drone cup types) with raised peripheral edges are overlapped in opposite directions, and inner fins are interposed therein. The present invention relates to one in which different fluids circulate on the front side and the back side.
[0002]
[Prior art]
The plate-type heat exchanger, called the Delon cup type, has a peripheral edge raised by press molding, and a pair of plates formed in a dish-like shape are overlapped in opposite directions, and the peripheral edges are joined and bent into a wave shape inside. There are known ones that interpose an inner fin. In such a heat exchanger with an inner fin, one in which different fluids are circulated on the front side and the back side of the inner fin and heat exchange is performed between the two fluids is known (for example, see Patent Document 1). .)
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-162179 [0004]
In this heat exchanger, the peripheral edges of the inner fins are integrally joined to the peripheral edges of the pair of upper and lower plates, and the ridges that form the corrugations of the inner fins are in contact with the inner surfaces of the upper and lower pair of plates. The contact portion is integrally brazed and fixed. And a 1st fluid distribute | circulates between the 1st plate and the surface side of an inner fin, and a 2nd fluid distribute | circulates between a 2nd plate and the back surface side of an inner fin.
[0005]
[Problems to be solved by the invention]
Each protrusion of the conventional inner fin is in contact with the inner surfaces of the pair of plates. Therefore, the fluid cannot flow through the contact portion, and the structure does not function as a heat transfer surface.
Then, this invention makes it a subject to ensure a heat-transfer surface as much as possible and to promote heat exchange.
[0006]
[Means for Solving the Problems]
According to the present invention, a pair of parallel edges are bent to form a groove, and a pair of mutual flanges (15) are formed at the edges of both side walls. A first plate (1) and a second plate (2) to be aligned;
Heat exchange in which the small flanges (15) of both plates (1) and (2) are joined facing each other, both ends in the groove direction are closed, and corrugated inner fins (3) are inserted inside In the vessel
The peripheral edges of the inner fin (3) are joined to the peripheral edges of the two plates (1) (2), and the tips of the ridges of a number of waves formed on both surfaces of the inner fin (3) and the two plates (1 ) A gap t is formed between the inner surface of (2) and
A flat first flow path (4) through which the first fluid (8) flows is formed between the first plate (1) and the inner fin (3), and
A flat second flow path (5) through which the second fluid (9) flows is formed between the second plate (2) and the inner fin (3).
A pair of inlet / outlet ports (6) and (7) communicating with the first channel (4) and the second channel (5), respectively, are formed,
The reinforcing ridge (16) protrudes only from the inner surface of the first plate (1), and the tip surface of the reinforcing ridge (16) intersects and contacts the tip of the ridge of the inner fin (3). The contact part is bonded and fixed,
The plate type heat exchanger is configured such that the fluid pressure of the first fluid (8) flowing through the first flow path (4) is higher than the fluid pressure of the second fluid (9) .
[0008]
The present invention according to claim 2 is the method according to claim 1 ,
In this plate type heat exchanger, the entire peripheries of the plates (1) and (2) are raised, and the small flange portion (15) is formed on the periphery thereof.
The present invention according to claim 3 provides the method according to claim 1 ,
The plates (1) and (2) are bent into a groove shape, and both ends in the groove direction are opened, and a pair of corrugated end covers (21) aligned between the opening and the inner fin (3) are provided. It is a plate-type heat exchanger that is fitted and fixed in the thickness direction.
[0009]
A fourth aspect of the present invention provides the method according to any one of the first to third aspects,
A pair of entrances (6) is provided in the second plate (2) so as to be spaced apart from each other, and a pair of communication holes (10) are formed in a part of the corrugation of the inner fin (3) so as to align with the entrance (6). )
A spacer (20) having a corrugated end face is interposed and fixed so as to close the gap between the entrance and exit (6) and the hole edge of the communication hole (10),
The plate-type heat exchanger is provided with a pair of entrances (6) and (7) spaced apart from each other only in the second plate (2).
[0010]
The present invention according to claim 5 is the invention according to claim 4 ,
The amplitude of the wave of the inner fin (3) at the position of the entrance / exit (6) (7) is strip-shaped in a direction perpendicular to the wave projection of the wave of the inner fin (3), and smaller than that of other portions. It is a plate type heat exchanger in which an amplitude compression part (19) is formed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a fragmentary perspective view showing a first embodiment of a plate heat exchanger according to the present invention, FIG. 2 is an overall perspective view thereof, and FIG. 3 is a boss portion for pipe connection at an entrance / exit 6 thereof. FIG.
This plate-type heat exchanger has a pair of first plate 1 and second plate 2 each of which is formed in a dish shape with its entire periphery raised, and a small flange portion on the entire periphery of each plate. 15 is slightly protruding. In this example, the outer circumferences of the first plate 1 and the second plate 2 are aligned with each other, and the plane is formed in a rectangular shape.
[0012]
As shown in FIG. 2, the second plate 2 is formed with a pair of entrances 6 and entrances 7 at opposite ends in the longitudinal direction and diagonally. The hole edge part of a pair of entrance / exit 6 is recessed in the inner surface side.
Next, the inner fins 3 whose outer peripheries are aligned with the first plate 1 and the second plate 2 are formed so that the ridges of the waves are formed in the longitudinal direction except for the peripheral edge and both ends in the longitudinal direction. It is formed into a waveform by press molding. The peripheral edge of the inner fin 3 is sandwiched between small flange portions on the peripheral edge of the pair of first plate 1 and second plate 2.
[0013]
In addition, a pair of communication holes 10 aligned with the first inlet / outlet 6 are formed in a diagonal line in the flat portions 3b existing at both ends of the inner fin 3 in the longitudinal direction.
In this way, the inner fin 3 interposed between the pair of first plate 1 and second plate 2 has a gap t between the ridges of each wave and the first plate 1 and the second plate 2 as shown in FIG. And it is formed as shown in FIG. Further, in this example, a plurality of reinforcing ridges 16 are spaced apart from each other in the longitudinal direction on the first plate 1 and protrude to the inner surface side, and the top of the reinforcing ridge 16 and each ridge of the inner fin 3 are orthogonal to each other, The contact portions are fixed to each other by brazing.
[0014]
In this example, the reinforcing protrusion 16 is formed only on the first plate 1, but it may be provided on the inner surface side of the second plate 2.
And between the front-end | tip and each part of the protruding item | line of the inner fin 3, it can braze and fix integrally. And in the figure of the inner fin 3, the flat 1st flow path 4 is formed in the lower surface side, and the same 2nd flow path 5 is formed in the upper surface side.
In this example, as shown in FIG. 3, a ring-shaped boss portion 11 in which a bolt 14 is implanted is brazed and fixed to the entrance / exit 6 of the second plate 2, and a seal O-ring and a nut 13 (not shown) are attached thereto. The flange portion of the pipe 12 is fixed.
[0015]
Then, the first fluid 8 flows into the first channel 4 from one of the first ports 6, flows through the flat first channel 4, and flows out from the other port 6. In addition, the second fluid 9 flows from the second one inlet / outlet 7 to the other inlet / outlet 7 via the second flow path 5, and heat exchange is performed between the first fluid 8 and the second fluid 9. Done.
In the example of FIGS. 1 to 3, the reinforcing protrusion 16 is formed only on the first plate 1, and the pressure resistance on the first flow path 4 side is higher than that of the second flow path 5. Therefore, the fluid pressure of the first fluid 8 flowing in the first flow path 4 is higher than the fluid pressure of the second fluid 9 flowing in the second flow path 5.
[0016]
Next, FIGS. 4 to 6 show a second embodiment of the present invention, FIG. 4 is a partially broken exploded perspective view thereof, FIG. 5 is a schematic sectional view taken along line VV of FIG. 4, and FIG. 5 is a schematic cross-sectional view taken along the line VI-VI.
This example has a pair of first plate 1 and second plate 2 formed in a groove shape by bending both edges parallel to each other, and a small flange portion 15 is formed on each edge. Yes. And the edge part of the inner fin 3 is pinched | interposed between the small flange parts 15 of the 1st plate 1 and the 2nd plate 2, and between them is brazed and fixed integrally.
[0017]
The second plate 2 is provided with a pair of first entrances 7 and second entrances 6 at opposite corners of the second plate 2 at diagonal corners. In the first entrance 6, a communication hole 10 aligned therewith is formed in the inner fin 3 as shown in FIGS. 5 and 6. A spacer 20 having a corrugated bottom surface between the hole edge of the communication hole 10 and the hole edge of the first doorway 6 is formed between the hole edges as shown in FIGS. It is intervened to communicate.
Next, a pair of corrugated end caps 21 are fitted into the openings between the longitudinal ends of the first plate 1 and the second plate 2 and the inner fins 3. The inner fin 3 and the second plate 2 are integrally brazed and fixed.
[0018]
Next, a plurality of reinforcing ridges 16 are formed on the first plate 1 and the second plate 2 so as to be spaced apart from each other in the longitudinal direction, and the tops of the reinforcing ridges 16 and the ridges of each wave of the inner fin 3 intersect. At the same time, they are in contact with each other, and the contact portions are integrally brazed and fixed. The inner fin 3 is provided with an amplitude compression section (19) in which the amplitude of the wave is compressed at the positions of the entrances 6 and 7, and each fluid can move in the width direction at the entrances 6 and 7. Then, the first fluid 8 flows from one side of the pair of first entrances 6 and flows into the first flow path 4 through the spacer 20, and the first flow path 4 is moved from the left to the right in FIG. And flows out from the other entrance 6. In addition, the second fluid 9 flows from one side of the second pair of inlets / outlets 7, flows through the second channel 5 from the right to the left, and flows out from the other inlet / outlet 7. Heat exchange is performed between the fluids 8 and 9.
[0019]
Next, FIG. 7 is a longitudinal sectional view showing still another embodiment of the present invention, in which a pair of entrances 6 (one is omitted) is formed at both longitudinal ends of the first plate 1, and the second plate 2. A pair of entrances 7 are formed at both ends in the longitudinal direction. Others are basically the same as those of FIG.
By doing so, the spacer 20 required in the embodiment of FIG. 4 can be omitted.
[0020]
[Operation and effect of the invention]
The plate-type heat exchanger of the present invention has a flat first flow path 4 and second flow path 5 formed on the front side and the back side through inner fins 3. A gap t is formed between the tip of the wave ridge and the inner surfaces of both the first plate 1 and the second plate 2. Therefore, compared with the plate type heat exchanger having a conventional inner fin, the heat radiation area is increased, and the heat exchange can be promoted.
That is, the conventional plate type heat exchanger having inner fins is one in which each ridge of the wave of the inner fin comes into contact with a pair of opposing plates, and the contact portions are brazed and fixed. Therefore, neither the 1st flow path nor the 2nd flow path could distribute | circulate in the brazing part, and the heat radiation area was reduced by that much.
However, in the inner fin of the present application, a gap t is formed between the tip of each ridge and the first plate 1 and the second plate 2, so that each fluid flows through all the ridges of the inner fin 3. Heat exchange is promoted.
[0021]
Further, projecting reinforcement ridges 16 only on the inner face of the first plate 1, and the pressure higher than the fluid pressure in the fluid pressure second fluid 9 of the first fluid 8 flowing in the first flow path 4 Since the tip surface of the reinforcing ridge 16 intersects and contacts the tip of the inner fin 3 and the contact portion is joined and fixed, the pressure-resistant first plate 1 and the inner fin 3 are fixed. Since the 1st fluid 8 distribute | circulates, it can become a reliable heat exchanger.
[0022]
In any of the above-described configurations, the entire circumference of the first plate 1 and the second plate 2 can be raised, and the small flange portion 15 can be formed on the periphery thereof. As a result, it is possible to provide a plate-type heat exchanger that has a small number of parts, a simple structure, and is easy to manufacture.
In any of the above-described configurations, the first plate 1 and the second plate 2 are bent in a groove shape, both ends in the groove direction are opened, and the gap between the opening and the inner fin 3 is closed by the corrugated end lid 21. can do. By doing in this way, it can manufacture by forming the 1st plate 1 and the 2nd plate 2 in a very long groove-shaped body, and cutting it into length suitably. Therefore, a plate heat exchanger with a low manufacturing cost can be provided.
[0023]
In any one of the above-described configurations, the inner fin 3 is provided with a communication hole 10 in alignment with the pair of entrances 6 of the second plate 2, and a gap between the hole edge of the communication hole 10 and the hole edge of the entrance 6 is provided. It can be connected and fixed by a spacer 20 having a corrugated end face. Thereby, the first fluid 8 can be circulated into the first flow path 4 from the second plate 2 side.
In the above configuration, the wave amplitude of the inner fin 3 can be partially reduced at the positions of the entrances 6 and 7. Thereby, the fluid flowing in and out from the entrances 6 and 7 can be diffused in a band shape, and each fluid can be circulated uniformly in each part.
[Brief description of the drawings]
FIG. 1 is a fragmentary perspective view of a plate-type heat exchanger according to the present invention.
FIG. 2 is a schematic perspective view of the plate heat exchanger.
FIG. 3 is a longitudinal sectional view of a main part at an entrance / exit 6 of the plate heat exchanger.
FIG. 4 is a partially broken exploded perspective view showing another embodiment of the plate heat exchanger of the present invention.
5 is a schematic cross-sectional view taken along the line VV in FIG. 4;
6 is a schematic cross-sectional view taken along the line VI-VI in FIG. 5;
FIG. 7 is a cross-sectional view of an essential part of another plate type heat exchanger of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st plate 2 2nd plate 3 Inner fin 3a Corrugated part 3b Flat part 4 1st flow path 5 2nd flow paths 6, 7 Entrance / exit 8 First fluid 9 Second fluid
10 communication hole
11 Boss
12 pipes
13 Nut
14 volts
15 Small flange
16 Reinforcing ridges
19 Amplitude compression unit
20 Spacer
21 Corrugated end cap

Claims (5)

Each of the pair of parallel edge portions is bent and formed into a groove shape, and a pair of first plates (1) and the first plate (1), which are aligned with each other, have small flange portions (15) formed at the edges of both side walls. 2 plates (2)
Heat exchange in which the small flanges (15) of both plates (1) and (2) are joined facing each other, both ends in the groove direction are closed, and corrugated inner fins (3) are inserted inside In the vessel
The peripheral edges of the inner fin (3) are joined to the peripheral edges of the two plates (1) (2), and the tips of the ridges of a number of waves formed on both surfaces of the inner fin (3) and the two plates (1 ) A gap t is formed between the inner surface of (2) and
A flat first flow path (4) through which the first fluid (8) flows is formed between the first plate (1) and the inner fin (3), and
A flat second flow path (5) through which the second fluid (9) flows is formed between the second plate (2) and the inner fin (3).
A pair of inlet / outlet ports (6) and (7) communicating with the first channel (4) and the second channel (5), respectively, are formed,
The reinforcing ridge (16) protrudes only from the inner surface of the first plate (1), and the tip surface of the reinforcing ridge (16) intersects and contacts the tip of the ridge of the inner fin (3). The contact part is bonded and fixed,
A plate heat exchanger in which the fluid pressure of the first fluid (8) flowing through the first flow path (4) is higher than the fluid pressure of the second fluid (9) . In claim 1 ,
A plate-type heat exchanger in which the entire circumference of the plates (1) and (2) is raised, and the small flange portion (15) is formed on the periphery thereof. In claim 1 ,
The plates (1) and (2) are bent into a groove shape, and both ends in the groove direction are opened, and a pair of corrugated end covers (21) aligned between the opening and the inner fin (3) are provided. Plate type heat exchangers fitted and fixed in the thickness direction. In any one of Claims 1-3 ,
A pair of entrances (6) is provided in the second plate (2) so as to be spaced apart from each other, and a pair of communication holes (10) are formed in a part of the corrugation of the inner fin (3) so as to align with the entrance (6). ), And a spacer (20) having a corrugated end surface is interposed and fixed so as to close the gap between the entrance and exit (6) and the hole edge of the communication hole (10) in an annular shape,
A plate-type heat exchanger in which a pair of entrances (6) and (7) are provided apart from each other only in the second plate (2). In claim 4 ,
The amplitude of the wave of the inner fin (3) at the position of the entrance / exit (6) (7) is strip-shaped in a direction perpendicular to the wave projection of the wave of the inner fin (3), and smaller than that of other portions. A plate heat exchanger in which an amplitude compression section (19) is formed.

Images