JP2017009191A - Temporary assembly means for header plate and core of heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a core 3 by arranging a flat tube 1 and fins 2 in parallel and disposing a core support 4 at both ends in the parallel direction, and performing a temporary assembly of the core and a header plate 6 easily and reliably.
A seat portion for supporting a flat surface of a header plate is integrally cut and raised on a core support, and an insertion end portion of the core support is inserted into a flat hole in the header plate. The longitudinal end portion of the header plate 6 is seated on the seat portion 8.
[Selection] Figure 1

Description

  The present invention relates to a structure and a method for positioning and temporarily fixing a header plate and a core before brazing in a heat exchanger for joining parts by brazing.

In a heat exchanger in which a pair of headers are arranged at both ends of the core, the core usually has flat tubes and corrugated fins alternately arranged in parallel, and core supports are arranged at both end positions in the parallel direction. The header is usually composed of an assembly of a header plate and a header body, and a flat hole through which the flat tube and the core support are inserted is formed in the header plate. Such a core and a header are integrally joined and fixed by brazing each part.
In brazing, the core and the header are positioned between each other by appropriate temporary fixing means. Conventionally, as a positioning means, a tapered tube is inserted into the flat hole of the header plate, the tube is fixed to the tube, and then TIG welding is used, or a fixed jig is used until the integrated brazing process. Was used.

Japanese Patent No. 3808593

In the conventional method, tube tapering and spot welding are added, or a dedicated jig or the like is required, which increases the manufacturing cost.
Then, this invention makes it a subject to provide the temporary assembly means of the header plate and core of a heat exchanger which can perform temporary fixation with a header plate and a core by a simple process.

The invention according to claim 1 includes a core (3) in which flat tubes (1) and fins (2) are alternately arranged in parallel, and a pair of core supports (4) are arranged at both ends in the parallel direction. ,
A header plate (6) in which a flat hole (5) through which the tip of each flat tube (1) of the core (3) and the tip of the core support (4) are inserted is arranged;
Comprising
A heat exchanger in which the core (3) and the header plate (6) are integrally brazed, and in the temporary assembly means of the header plate and the core before brazing,
At the end in the longitudinal direction of the core support (4), there is an insertion end (7) that fits into the flat hole (5), and the insertion end (7) of the core support (4) Adjacent to the insertion end (7), closer to the center of the core support (4), a seat (8) for supporting the plane of the header plate (6) is integrated with the core support (4). Cut and raised,
Insert the end of each flat tube (1) and the insertion end (7) of the core support (4) into the flat hole (5) of the header plate (6), and insert the header plate (6) A temporary assembly means of a header plate and a core of a heat exchanger characterized by being seated on a seat (8).

Invention of Claim 2 is the temporary assembly means of the header plate and core of the heat exchanger of Claim 1,
A header plate and a core of a heat exchanger characterized in that at least a part of the insertion end (7) is plastically deformed so that the plastically deformed portion (7a) is crimped to the flat hole (5). Is a temporary assembly means.

The invention according to claim 3 is a temporary assembly means of the header plate and the core of the heat exchanger according to claim 2,
The flat hole (5) is formed in the width direction of the core,
The insertion end (7) has a V-shaped notch (9) (including the U-shaped notch (9a), which is the same hereinafter) that expands toward the tip thereof. The end easily deformable portion (10) is formed on at least one side of the end portion, and the end easily deformable portion (10) is plastically deformed so that the edge thereof is crimped to the edge of the flat hole (5). It is the temporary assembly means of the header plate and the core of the heat exchanger characterized.

Invention of Claim 4 is the temporary assembly means of the header plate and core of the heat exchanger of Claim 3,
A plurality of the V-shaped notches (9) are juxtaposed in the width direction at the insertion end (7), and a pair of end deformable portions (10) are formed at both ends in the width direction. Each of the end deformable portions (10) is plastically deformed so that the edges thereof are crimped to both edges of the flat holes (5). Assembling means.

The invention according to claim 5 is a temporary assembly means of the header plate and the core of the heat exchanger according to claim 1,
The insertion end (7) has a plurality of the V-shaped notches (9), and at least one central deformable portion (11) between the V-shaped notches (9). ), And the central deformable portion (11) is bent in the longitudinal direction of the header plate, and the bent portion is crimped to the edge of the flat hole (5). This is a temporary assembly means of the header plate and the core.

In the present invention, a seat portion 8 for supporting the flat surface of the header plate 6 is formed by cutting and raising integrally with the core support 4, and the end portion of each flat tube 1 and the insertion end portion 7 of the core support 4 are The header plate 6 is inserted into the flat hole 5 of the header plate 6 and is seated on the seat portion 8.
By the seating, the positioning of the core 3 and the header plate 6 can be performed simply and simply, and brazing can be performed smoothly.

According to the second aspect of the present invention, in the above-described configuration, at least a part of the insertion end 7 is plastically deformed so that the plastically deformed portion 7a is pressure-bonded to the flat hole 5.
Thereby, between the core 3 and the header plate 6 can be simply and simply temporarily fixed, and brazing can be performed smoothly.

The invention according to claim 3 is, in the above-described configuration, by forming an end deformable portion 10 on at least one side of the V-shaped notch 9 and plastically deforming the end deformable portion 10. The edge is pressure-bonded to the edge of the flat hole 5.
In this case, since the end easily deformable portion 10 is easily plastically deformed, it is easy and reliable between the core 3 and the header plate 6 with a small force and without applying an excessive load to other portions. Temporarily fixing can be performed smoothly.

According to a fourth aspect of the present invention, in the configuration described above, the plurality of V-shaped notch portions 9 are arranged in parallel with the insertion end portion 7, and a pair of end portion easy deformation portions 10 are formed at both ends in the width direction. Each edge deformable portion 10 is plastically deformed so that the edges thereof are crimped to both edges of the flat hole 5.
According to the present invention, both ends in the width direction of the core support 4 are mainly plastically deformed and temporarily fixed in the flat holes 5. Therefore, the core 3 and the header plate 6 are temporarily fixed more securely. Can be attached smoothly.

According to the invention described in claim 5, at least one central deformable portion 11 is formed between the plurality of V-shaped notches 9, and the central easy deformable portion 11 is formed in the longitudinal direction of the header plate. The bent portion is crimped to the hole edge of the flat flat hole 5.
Even with this means, the core 3 and the header plate 6 can be easily and simply temporarily fixed, and brazing can be performed smoothly.

The principal part exploded view (A) and the longitudinal cross-sectional view (B) which show the temporary assembly means of the header plate and core of 1st Example of this invention. The principal part exploded view (A) of 2nd Example of this invention, and its longitudinal cross-sectional view (B). The principal part exploded view (A) of the 3rd Example of the present invention, and the longitudinal section (B). The principal part cross-sectional explanatory drawing of 4th Example of this invention. The perspective view of the core support 4 used for 5th Example of this invention. Explanatory drawing (A) of the plastic deformation in the edge part of the core support 4 of 5th Example, and its longitudinal cross-sectional view (B). The perspective explanatory drawing (A) of the plastic deformation of the 6th example of the present invention, and the longitudinal section (B). The disassembled perspective view which shows an example of the heat exchanger with which this invention is applied.

Next, each embodiment of the present invention will be described with reference to the drawings.
As an example, this heat exchanger can be applied to the air conditioning condenser shown in the exploded perspective view of FIG. (In the actual use, this condenser is arranged so that the inlet pipe 16 is on the upper side, the outlet pipe 17 is on the lower side, and the flat surfaces of the flat tubes are horizontal.)
In this example, the flat tubes 1 and the fins 2 are alternately arranged in parallel, and a pair of core supports 4 are arranged at both end positions in the parallel direction to constitute the core 3. And the header 23 which has the header plate 6 and the header main body 15 is arrange | positioned with respect to the core 3 at the both ends of the up-down direction of a figure. In the header plate 6, flat holes 5 that fit into both ends of each flat tube 1 and the core support 4 are formed at regular intervals. In addition, a pair of end lids 13 are disposed at both ends of the header 23, and one partition plate 14 is disposed in the middle of the upper header 23, and two partition plates 14 are disposed in the lower header 23. Each is disposed at an appropriate position.
In the heat exchanger of the example of FIG. 8, the refrigerant 18 flows from the inlet pipe 16 of the header 23. At this time, the refrigerant 18 is compressed by the compressor and has a relatively high temperature. The refrigerant 18 passes through the upper and lower headers 23 in a meandering manner between the partition plates 14 as indicated by arrows, and heat is exchanged with the cooling air flowing in the width direction of the core 3 therebetween, and flows out from the outlet pipe 17 of the header 23. To do. In the meantime, the refrigerant 18 is gradually condensed and finally flows out from the outlet pipe 17 in a supercooled state.

Then, a large number of the flat tubes 1 and fins 2 arranged in parallel and a pair of core supports 4 arranged at both ends in the parallel direction form a core 3, and both ends of each flat tube 1 and both ends of the core support 4 are connected to each other. Each of the upper and lower header plates 6 is inserted into the flat hole 5 and the header body 15 is fitted into the header plate 6 to assemble the components. The assembly is integrally brazed between the parts in a high temperature furnace.
Here, the feature of the present invention is the temporary positioning of the core 3 and the pair of upper and lower header plates 6 before brazing.

  In this example, the core support 4 of the core 3 is formed in a groove shape except for the upper and lower ends and constitutes a strength member. The core support 4 is not necessarily formed in a groove shape, and may be a flat plate. The present invention relates to positioning temporary fixing between the both end portions of the core 3 and the pair of upper and lower header plates 6.

FIGS. 1A and 1B are explanatory views of a first embodiment of the present invention, FIG. 1A is an explanatory view for assembling the main part, and FIG. The core support 4 in this example omits the groove-type portion. Further, the connection state between the upper end portion of the core support 4 and the upper header plate 6 is partially shown. And it is similarly assembled on the lower side of the core support 4.
Here, the core support 4 is previously formed with insertion end portions 7 at both upper and lower ends thereof by press molding. The outer periphery of the cross section of the insertion end 7 is aligned with the inner periphery of the flat hole 5 of the header plate 6. The insertion end 7 is provided with a pair of V-shaped notches 9 spaced apart in the width direction, and a pair of end deformable portions 10 are formed at both ends in the width direction. Then, adjacent to the insertion end portion 7, a tongue piece is cut and raised substantially parallel to the lower surface of the header plate 6 at the end portion of the core support 4 to form a seat portion 8.

Then, as shown in FIG. 1B, the flat tube 1 and the core support 4 of the core 3 are inserted into the flat holes 5, and the end portion of the header plate 6 is seated on the seat portion 8. Thereby, the header plate 6 and the core 3 are positioned in the up-down direction and the left-right direction.
In this example, as shown in FIG. 4, the pair of end deformable portions 10 at both ends in the width direction of the insertion end portion 7 of the core support 4 is plastically deformed in the width direction, and the long hole edge of the flat hole 5 is obtained. The plastic deformation part 7a of the end part easy deformation part 10 is pressure-bonded to the part. Thereby, the pair of insertion end portions 7 are temporarily fixed to both edges of the flat hole 5 on the long axis side.

In this state, the header main body 15 shown in FIG. At this time, the projections 24 of the end lid 13 and the partition plate 14 are fitted into the locking holes 20 of the header body 15. Then, crimping claws 19 protruding at regular intervals on the edge of the header body 15 are crimped and fixed to the side wall of the header plate 6 to complete the entire temporary assembly.
Note that a brazing material is coated or applied in advance to at least one of the components that contact each other. Then, the temporary assembly is inserted into a high-temperature furnace and the parts are integrally brazed and fixed.

Next, FIG. 2 shows a temporary assembling means of the second embodiment of the present invention, and this example is different from that of FIG. 1 in the direction in which the seat portion 8 is cut and raised. In this example, the tongue piece is cut and raised substantially perpendicularly to the lower surface of the header plate 6 to form a seat portion 8, and the upper end surface of the seat portion 8 is disposed substantially parallel to the plane of the header plate 6. Then, the header plate 6 is seated on the upper edge of the seat portion 8 as shown in FIG.
Also in this example, the end deformable portions 10 located at both ends in the width direction of the insertion end portion 7 are plastically deformed from the chain line state to the solid line state as shown in FIG. The plastic deformation portion 7a is fixed by crimping to both end edges.

Next, FIG. 3 shows a third embodiment of the present invention. This example is different from the example of FIG. 2 in that the end of the core support 4 is adjacent to the insertion end 7 in the width direction. A pair of tongue pieces are cut and raised substantially vertically on the lower surface of the header plate 6 on both sides to form a pair of seat portions 8. The upper end surface is substantially parallel to the plane of the header plate 6, and the plane of the header plate 6 is seated on the pair of seats 8 as shown in FIG.
Also in this example, the end deformable portions 10 located at both ends in the width direction of the insertion end portion 7 are plastically deformed in the major axis direction of the flat hole 5, and the plastic deformed portions 7a are crimped to both edges of the major axis side. Fixed.

Next, FIG. 5 shows a fifth embodiment of the present invention, and this example is different from that of FIG. 1 in the shape of the V-shaped notch 9. In the example of FIG. 1, the V-shaped notch 9 is notched in a V shape, but in the example of FIG. 5, a U-shaped notch 9 a notched in a U shape is formed. Yes.
FIG. 6 is another example of plastic deformation of the insertion end 7. In this example, the pair of end deformable portions 10 positioned at both ends in the width direction of the core support 4 are plastically deformed to one side in the minor diameter direction of the flat hole, and the central deformable portion 11 positioned at the center thereof. Is plastically deformed to the other side, whereby the end of the core support 4 and the header plate 6 are fixed by pressure bonding.
Next, FIG. 7 is another example of plastic deformation of the insertion end 7 shown in FIG. In this example, the central easily deformable portion 11 located between the pair of U-shaped notches 9a is plastically deformed toward the seat portion 8, whereby the core support 4 and the header plate 6 are crimped and fixed.

  After the core 3 and the header plate 6 are positioned and fixed in this manner, the header body 15 is combined with the header plate 6. The whole is then inserted into a high temperature furnace and brazed together to complete the heat exchanger. Since each part is temporarily fixed in the furnace in advance, the parts are brazed with high precision in a state where each part is positioned.

  In the above embodiment, the condenser has been described as an example of the heat exchanger. However, it can be used for other various heat exchangers such as an engine cooling radiator, an intercooler, an oil cooler, and the like.

DESCRIPTION OF SYMBOLS 1 Flat tube 2 Fin 3 Core 4 Core support 4a Side wall part 5 Flat hole 6 Header plate 7 Insertion end part 7a Plastic deformation part 8 Seat part

9 V-shaped notch 9a U-shaped notch 10 End deformable part 11 Central deformable part 13 End cover 14 Partition plate 15 Header body 16 Inlet pipe 17 Outlet pipe

18 Refrigerant 19 Caulking Claw 20 Locking Hole 21 Window 22 Side Notch 23 Header 24 Convex

Claims (5)

The flat tube (1) and the fin (2) are alternately arranged in parallel, and a core (3) in which a pair of core supports (4) are arranged at both ends in the parallel direction,
A header plate (6) in which a flat hole (5) through which the tip of each flat tube (1) of the core (3) and the tip of the core support (4) are inserted is arranged;
Comprising
A heat exchanger in which the core (3) and the header plate (6) are integrally brazed, and in the temporary assembly means of the header plate and the core before brazing,
At the end in the longitudinal direction of the core support (4), there is an insertion end (7) that fits into the flat hole (5), and the insertion end (7) of the core support (4) Adjacent to the insertion end (7), closer to the center of the core support (4), a seat (8) for supporting the plane of the header plate (6) is integrated with the core support (4). Cut and raised,
Insert the end of each flat tube (1) and the insertion end (7) of the core support (4) into the flat hole (5) of the header plate (6), and insert the header plate (6) Temporary assembly means of a header plate and a core of a heat exchanger characterized by being seated on a seat (8). In the temporary assembly means of the header plate and the core of the heat exchanger according to claim 1,
A header plate and a core of a heat exchanger characterized in that at least a part of the insertion end (7) is plastically deformed so that the plastically deformed portion (7a) is crimped to the flat hole (5). And temporary assembly means. In the temporary assembly means of the header plate and the core of the heat exchanger according to claim 2,
The flat hole (5) is formed in the width direction of the core,
The insertion end (7) has a V-shaped notch (9) (including the U-shaped notch (9a), which is the same hereinafter) that expands toward the tip thereof. The end easily deformable portion (10) is formed on at least one side of the end portion, and the end easily deformable portion (10) is plastically deformed so that the edge thereof is crimped to the edge of the flat hole (5). A temporary assembly means of a header plate and a core of a heat exchanger as a feature. In the temporary assembly means of the header plate and the core of the heat exchanger according to claim 3,
A plurality of the V-shaped notches (9) are juxtaposed in the width direction at the insertion end (7), and a pair of end deformable portions (10) are formed at both ends in the width direction. Each of the end deformable portions (10) is plastically deformed so that the edges thereof are crimped to both edges of the flat holes (5). Assembly means. In the temporary assembly means of the header plate and the core of the heat exchanger according to claim 1,
The insertion end (7) has a plurality of the V-shaped notches (9), and at least one central deformable portion (11) between the V-shaped notches (9). ), And the central deformable portion (11) is bent in the longitudinal direction of the header plate, and the bent portion is crimped to the edge of the flat hole (5). Temporary assembly means of header plate and core.

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