JPH04244596A - Heat exchanger - Google Patents

Abstract

PURPOSE:To mount all fins in a single process by boring insertion holes on a header and inserting and connecting both ends of a side plate into said holes. CONSTITUTION:Tubes 1 and a side plate 11 are set at a specified span wherein all corrugated fins 3 are previously laid out so as to match the clearance between each tube 1 and the clearance between the tubes 1 and the side plate 1. The fins 3 are transferred into these clearances simultaneously and mounted therein. Then, the both ends of each tube 1 and the side plate 11 are inserted into a mount hole 2a and an insertion hole 15 on a header 2. This construction makes it possible to set previously the side plate to a fixed position and further lay out the corrugated fins 3 in advance in such a fashion that they may match the clearance between each tube 1 and the clearance between the tubes 1 and the side plate 1. It is, therefore, possible to mount every corrugated fin 3 simultaneously.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used in refrigeration equipment and the like.

0002

[Prior Art] A conventional heat exchanger, as shown in FIG.
A flat tube 1 through which a heat medium passes, a pair of hollow headers 2 communicating with the tube 1 to introduce or lead out the heat medium into the tube 1, and corrugated fins 3 interposed between the tubes 1. and a side plate 4 that protects the outermost fin 3. The surfaces of the header 2 and the fins 3 are each coated with a brazing material.

[0003] This heat exchanger is assembled and brazed in the following manner. That is, after setting the tubes 1 at regular intervals on an assembly jig (not shown) and positioning both ends of the tubes 1, the fins 3 arranged in advance are placed so as to match the gap positions between all the tubes 1. They are moved and inserted all at once into the above gap. Next, a side plate 4 with both ends bent is placed on the outermost tube 1, and a fin 3 is interposed in the gap between the side plate 4 and the tube 1.

Next, as shown in the mounting state diagram of the pressure tool in FIG. 8, the horizontal jig 5a of the pressure tool 5 is placed along the side plates 4 at the upper and lower ends, and the horizontal jig 5a is moved by a pressure device (not shown). so that the tube 1 matches the mounting hole 2a of the header through the fin 3 and the tube 1 and the fin 3.
Apply pressure so that the and side plates 4 are in complete contact with each other, insert both ends of the tube 1 into the mounting holes 2a of the header 2, then attach the vertical jig 5b to the horizontal jig 5a, and tighten the bolts 5c to fix them. , the pressurization of the pressurizing device is released, and the pressurized state is maintained only by the pressurizing tool 5. This pressure tool 5
This prevents the side plate 4 from deforming against the reaction force from the pressurized fins and tubes. While maintaining the above state, batch brazing is performed in a brazing furnace to join and integrate each member.

[0005]

[Problems to be Solved by the Invention] When assembling the above heat exchanger, the position of the outermost fin 3 cannot be determined unless the side plate 4 is placed, so the interposition of the fin 3 is a two-step process. However, since all the fins 3 cannot be installed at the same time, it takes a long time to assemble.

The present invention solves the drawbacks of the above-mentioned prior art, and
The present invention aims to provide a heat exchanger in which all the fins can be installed at once in one step.

[0007]

[Means for Solving the Problems] The present invention has solved the above problems, and includes tubes and fins that are alternately stacked, both ends of the tubes being connected to a hollow header,
The present invention also relates to a heat exchanger having the following features, in which a side plate is disposed outside the fins at the outer end of the laminate. (1) An insertion hole is formed in the header, and both ends of the side plate are inserted into the insertion hole and joined. (2) In the heat exchanger of item (1) above, the side plate has a bent piece on its side edge.

[0008]

[Function] (1) By inserting and joining the side plate into the insertion hole drilled in the header, the position where the side plate is installed is determined, and when assembling the heat exchanger, the side plate is inserted in the same way as the tube. can be set in place in advance. Further, the fins can be arranged in advance so as to align not only with the gaps between the tubes but also with each position of the gap between the tubes and the side plate, so that all the fins can be interposed in the gaps at once. (2) When the side plate has a bent piece on its side edge, in addition to the above-mentioned effect, the side plate can withstand the reaction force when pressurized and held, thereby preventing its deformation.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of a first embodiment of the present invention. In the figure, 1 is a tube, 2 is a header, 2a is a tube mounting hole provided in the header 2, 3 is a corrugated fin, 11 is a side plate with a different shape from the conventional technology,
15 is an insertion hole of the side plate 11 provided in the header 2.

FIG. 2 is a two-sided view of the side plate 11, FIG. 2(A) is a plan view thereof, and FIG. 2(B) is a plan view thereof.
) is a sectional view taken along line II. The side plate 11 is for protecting the outermost corrugated fin 3, and has approximately the same length, thickness, and width as the tube 1, and both ends 13 are rounded as shown in the figure. It is formed in a rounded shape 13a, and the end portion is formed in a tapered shape 13b.

FIG. 3 is a sectional view of the vicinity of the side plate insertion hole 15 of the header 2 of the above embodiment, FIG. 3(A) is a longitudinal sectional view thereof, and FIG. -II sectional view. The header 2 has insertion holes 15 formed at the same pitch as the mounting holes 2a for connecting the tubes 1 and having a shape that matches the tip 13 of the side plate 11. As shown in the figure, it is formed into a tapered shape 15a in the radial direction from the central axis, so that the side plate 11 can be inserted accurately and easily.

The heat exchanger of this embodiment is assembled and brazed as follows. First, the surfaces of the header 2 and corrugated fins 3 are coated with a brazing material in advance. After that, tube 1 and side plate 1 are attached to an assembly jig (not shown).
1 at predetermined intervals and positioning both ends of the tube 1, corrugate fins 3 are arranged in advance in the gaps between the tubes 1 and in the gaps between the tubes 1 and the side plate 11 so as to match these gap positions. Move and attach them all at once. Next, the tube 1 is pressed through the side plates 11 at the upper and lower ends to completely contact the corrugated fin 3 and the tube 1 and the corrugated fin 3 and the side plate 11, respectively. Then, both ends of the side plate 11 are aligned and inserted, and then brazed together in a brazing furnace to join and integrate each member.

As described above, the side plate 11 of this embodiment has approximately the same length as the tube 1, and
Since the side plate 11 is inserted and joined to the header 2 at the same time, the longitudinal position of the side plate 11 is determined.
1 can be preset in a fixed position, and as a result,
Since the corrugated fins 3 can be arranged in advance not only in the gaps between the tubes 1 but also in the gaps between the tubes 1 and the side plates 11 so as to match the gap positions, all the corrugated fins 3 can be arranged at once. It can be attached to.

FIG. 4 is a perspective view of a second embodiment of the present invention. In the figure, 11A is a side plate having a different shape from that of the first embodiment, and 12 is a bent piece provided on the side edge of the side plate 11A. Other parts are the same as in the first embodiment.

FIG. 5 shows the side plate 11A of the above embodiment.
FIG. 2 is a perspective view and a partial cross-sectional view. FIG. 3(A) is a perspective view, and FIG. 2(B) is a sectional view taken along line III-III in FIG. 1(A). The side plate 11A of this embodiment also protects the outermost corrugated fin 3, and has approximately the same length, thickness, and width as the tube 1, but has a side plate parallel to the length direction. At the side end, there is a bent piece 1 bent at a substantially right angle.
2, thereby increasing the section modulus of the side plate and increasing the bending rigidity. Therefore, the bent piece 12 does not need to be formed over the entire length of the side end of the side plate 11A, and in this embodiment, the bent piece 12 is partially missing. Further, both ends 13 of the side plate 11A have rounded corners 13a and tapered ends 13a, as in the first embodiment.
3b. The header 2 has a mounting hole 2a for connecting the tube 1, as in the first embodiment (FIG. 3).
Insertion holes 15 having a shape that matches the tip 13 of the side plate 11A are bored at the same pitch as , and the insertion holes 15 are formed in a tapered shape 15a. Portions other than the above are the same as in the first embodiment.

FIG. 6 is a diagram illustrating the mounting state of the pressurizing tool during assembly in the above embodiment. This figure shows a state in which the bolt 5c of the vertical jig 5b of the pressurizing tool 5 is engaged with the missing portion of the bent piece 12 of the side plate. The assembly of the heat exchanger of this embodiment is the same as that of the first embodiment except for the above.

The functions and effects of this embodiment are basically the same as those of the first embodiment, but in this embodiment, the side plate 11A is bent by the bent piece 12 formed on the side edge of the side plate 11A. As a result of the increased bending rigidity, the side plate 11A is advantageous in that it will not be deformed even if the reaction force from the heat exchanger, which is held under pressure with the vertical jig 5b set, acts on the side plate 11A. There is.

[0018]

Effects of the Invention The heat exchanger of the present invention has a structure in which an insertion hole is formed in the header and both ends of the side plate are inserted into the insertion hole and joined, so that all the fins can be connected in one step. They can be installed all at once in the process, reducing assembly time. Further, when a side plate having a bent piece on the side edge is used, there is an advantage that deformation of the side plate during pressurization and holding is prevented.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a two-sided view of the side plate of the above embodiment.

FIG. 3 is a partial sectional view of the header of the above embodiment.

FIG. 4 is a perspective view of a heat exchanger according to a second embodiment of the present invention.

FIG. 5 is a perspective view and a partial sectional view of the side plate of the above embodiment.

FIG. 6 is a diagram showing how the pressurizing tool is attached in the above embodiment.

FIG. 7 is a front view of a conventional heat exchanger.

FIG. 8 is a diagram showing a state in which a conventional pressurizing tool is installed.

[Explanation of symbols]

1 Tube 2 Header 2a Mounting hole 3 Corrugated fin 4
side plate 5
Pressure tool 5a Horizontal jig 5b Vertical jig 5c Bolts 11, 11A Side plate 12 Bending piece 13 End portion 13a Rounded forming portion 13b
Tapered forming part 15 insertion hole

Claims (2)

[Claims] [Claim 1] A structure in which tubes and fins are alternately stacked, both ends of the tubes are connected to a hollow header, and a side plate is provided outside the fins at the outer end of the laminate. A heat exchanger characterized in that the header is provided with an insertion hole, and both ends of the side plate are inserted and joined into the insertion hole. 2. The heat exchanger according to claim 1, wherein the side plate has a bent piece on its side edge.