JPH05157485A - Heat exchanger - Google Patents

Abstract

PURPOSE:To obtain a heat exchanger which eliminates a positional deviation between two plates composing a header while enabling the checking of the positional deviation of the plates to be conducted by visual recognition. CONSTITUTION:A header 4 is made up of an internal plate 5 into which the ends of a plurality of tubes 2 and an external plate 6 on the side opposite to the side where a tube 2 is joined a joined by soldering. Then, when both the plates 5 and 6 are joined, a proper number of planar parts 8 and 9 are provide at the center part of respective bent parts of both the plate 5 and 6 in such a manner as to make parallel surfaces as opposed to the plates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger formed by joining a plurality of tubes and a tubular header.

[0002]

2. Description of the Related Art As a conventional technique, an actual Kaihei 2-1091 is used.
The technique disclosed in Japanese Patent Publication No. 84 is known. This technique joins two plates having a substantially U-shaped or C-shaped cross section to form a header. With this technology,
Since the hole into which the tube is inserted can be easily formed in the one plate before forming the header, there is an effect of improving the productivity of the header.

[0003]

The shape of the header generally tends to be a cylindrical shape with a curvature in order to withstand high pressure use. For this reason, when one plate and the other plate are joined together and joined, the plates are likely to rotate and a positional shift is likely to occur. As shown in FIG.
If the two plates 21 and 22 are misaligned, the gap portion 30 will be broken and the pressure resistance of the header 23 will be reduced, or as shown in FIG.
In the case of arranging, there is a problem that a gap 25 is generated between the partition plate 24 and the header 23 and an internal leak occurs. Further, since the header 23 is formed with a curved periphery, it is difficult to visually confirm the occurrence of the positional displacement of the plates 21 and 22.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat exchanger in which the displacement of two plates is unlikely to occur and the displacement of the plates can be easily confirmed visually.

[0005]

The heat exchanger of the present invention employs the following technical means. The heat exchanger includes a plurality of tubes and a tubular header joined to the ends of the plurality of tubes. The header is provided by joining an inner plate to which the tube is joined and an outer plate on a side different from the side to which the tube is joined. Further, each of the inner plate and the outer plate is provided with a flat surface portion which is a parallel surface in the joined state.

[0006]

When the two plates are joined to each other, pressure is applied to the flat portion of the inner plate and the flat portion of the outer plate, so that the two plates are less likely to be displaced due to rotation, and thus the two plates have the predetermined positions. Is adapted to.

[0007]

As described above, the heat exchanger of the present invention is less likely to be misaligned when the two plates are joined together, so that the pressure resistance of the header is reduced due to the misalignment and the partition plate inside the header is reduced. In the case of disposing, it is possible to eliminate a problem such as a gap between the partition plate and the header. Further, when the outer dimension widths of the two plates deviate from the specified dimensions and the two plates are displaced in the circumferential direction, the plane portion of the inner plate and the plane portion of the outer plate do not become parallel surfaces. Therefore, it is possible to confirm the positional deviation between the two plates by visually confirming the degree of parallelism between the two plane portions.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a heat exchanger of the present invention will be described with reference to the drawings based on an embodiment applied to a refrigerant condenser of a refrigeration cycle. [Structure of Embodiment] FIGS. 1 to 3 show an embodiment of the present invention. FIG. 1 is a plan view of a main part of a heat exchanger, FIG. 2 is a schematic sectional view of the heat exchanger, and FIG. FIG. The heat exchanger 1 used for the refrigerant condenser is made of a metal material such as brass and aluminum, and is roughly composed of a plurality of tubes 2, corrugated fins 3 and headers 4. The tube 2 is a flat tube that exchanges heat between the refrigerant flowing inside and the air passing between the tubes 2.
A plurality of passages are formed inside. The corrugated fins 3 are joined to the tubes 2 while being sandwiched between the tubes 2, and improve the heat exchange rate between the refrigerant flowing inside the tubes 2 and the air flowing between the tubes 2. This corrugated fin 3 is made of a band-shaped ultra-thin plate material,
It is provided by bending in a wavy shape. The corrugated fins 3 are usually provided with a large number of louvers in order to improve the heat exchange efficiency.

The header 4 is a tank connected to both ends of the plurality of tubes 2, respectively. As shown in FIG. 3, the header 4 is formed by joining two divided bodies by brazing, and the tube 2 is joined to the inner plate 5 to which the tube 2 having a substantially C-shaped cross section is joined. The cross section of the side different from the side is joined to the outer plate 6 having a substantially C-shaped cross section. At both ends of the outer plate 6, joint portions 7 are formed on the inner side for overlapping and joining both ends of the inner plate 5. Further, each of the inner plate 5 and the outer plate 6 is provided with flat portions 8 and 9 in the central portions of the curved portions. The plane portions 8 and 9 are preferably located at positions facing each other when the inner plate 5 and the outer plate 6 are joined, but the number is preferably smaller in consideration of the strength of the header 4. The flat portions 8 and 9 are fixed and pressed by the concave surface (not shown) of the jig when the inner plate 5 and the outer plate 6 are joined, and when joined, the flat portion 8 and the outer portion of the inner plate 5 are joined. The flat surface portion 9 of the plate 6 faces and becomes a parallel surface.

The inside of the header 4 is divided into an inflow chamber 11 and an outflow chamber 12 by a partition plate 10. An inlet pipe 13 for flowing the refrigerant into the header 4 is connected to the header 4 on the inflow chamber 11 side, and an outlet pipe 14 for discharging the refrigerant in the header 4 to the outside is connected to the header 4 on the outflow chamber 12 side. Are connected.

Next, the manufacturing process of the heat exchanger 1 including the manufacturing process of the header 4 will be briefly described. 1) First, the outer shape of the inner plate 5 is cut into a flat plate material by pressing, and a plurality of tubes 2 are formed.
To form the insertion hole. The inner size of the insertion hole is the same as the outer shape of the tube 2 or slightly larger. 2) The inner plate 5 in which the insertion hole is formed is processed into a C-shaped cross section by pressing. 3) Apart from the above steps 1) and 2), a flat plate material is
The outer shape of the outer plate 6 is cut by press working, and the outer plate 6 is processed into a C-shaped cross section including the joint 7. 4) The inner plate 5 and the outer plate 6 processed as described above are combined by a jig. At this time, the flat surface portion 8 of the inner plate 5 and the flat surface portion 9 of the outer plate 6 are pressed by the flat surface of the jig, and the gap between the flat surface portion 8 of the prescribed inner plate 5 and the flat surface portion 9 of the outer plate 6 is increased. Kept and kept. 5) Tube 2 laminated with corrugated fins 3
The end of the heat exchanger 1 is inserted into the insertion hole of the inner plate 5, and the assembly of the heat exchanger 1 is completed. 6) After that, the heat exchanger 1 held by the jig is put into a furnace, and each component of the heat exchanger 1 is joined by brazing.

[Effects of the Embodiment] The heat exchanger 1 of this embodiment
As shown in the above operation, when the inner plate 5 and the outer plate 6 are joined, the flat surface portion 8 of the inner plate 5 is
By pressing the flat surface portion 9 of the outer plate 6 with the flat surface of the jig, both plates are less likely to be displaced due to rotation, and the two plates can be aligned at the specified positions. Therefore, it is possible to eliminate problems such as a decrease in the pressure resistance of the header 4 due to the displacement of the plate and a gap between the partition plate 10 and the header 4. Also, the inner plate 5
When the outer plate 6 and the outer plate 6 are joined to each other and the two plates are misaligned, the flat surface portion 8 of the inner plate 5 and the flat surface portion 9 of the outer plate 6 do not become parallel surfaces.
Therefore, by visually recognizing the degree of parallelism between the two plane portions 8 and 9, it is possible to confirm the positional deviation between the two plates. Further, by measuring the degree of parallelism between both flat surface portions 8 and 9 with a gauge, it is possible to easily carry out a more rigorous confirmation of the displacement of the plate.

[Modification] In this embodiment, an example in which the heat exchanger is applied to a refrigerant condenser of a refrigeration cycle is shown. However, not only the refrigerant evaporator but also a heater core, a radiator, an oil cooler, an intercooler, and the like gas- Gas heat exchanger, gas −
It is applicable to a liquid heat exchanger and a liquid-liquid heat exchanger.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a heat exchanger (embodiment).

FIG. 2 is a schematic cross-sectional view of a heat exchanger (Example).

FIG. 3 is an exploded view of a main part of a header (embodiment).

FIG. 4 is a cross-sectional view of a header (prior art).

FIG. 5 is a cross-sectional view of a header (prior art).

[Explanation of symbols]

 1 heat exchanger 2 tube 4 header 5 inner plate 6 outer plate 8 and 9 plane part

Claims (1)

[Claims] 1. A heat exchanger comprising a plurality of tubes and a tubular header joined to the ends of the plurality of tubes, wherein the header includes an inner plate to which the tubes are joined, and It is provided by joining an outer plate on a side different from the joined side, and each of the inner plate and the outer plate is provided with a flat surface portion that is a parallel surface in the joined state. Characteristic heat exchanger.