JPH03279798A - Heat exchanger - Google Patents

Abstract

PURPOSE:To reduce the number of assemblying steps of a temporary assemblying work, improve a productivity and prevent a positional displacement of corrugated fins from occurring and side plates by a method wherein both ends of a side plate are fitted and disposed in fitting holes or concave parts disposed in relative opposing surfaces of both headers. CONSTITUTION:A temporary assembly is carrie dout such that many tubes 3 are disposed in parallel to each other in side-by-side relation and side plates 5 are disposed outside both outermost tubes 3. Headers 1, 1 are fitted and arranged at both ends of the tube 3 and the dies plates 5. This fitting is carried out such that ends of the tubes 3 are inserted into the tube insertion holes 6 of the header 1, and fitting projections 9 of the side plates 5 are inserted into the side plate fitting holes 8. Corrugated fins 4 are inserted into the arranged between the tubes 3 and between the outermost tubes 3 and the side plates 5. An entire assembly is bundles together and an entire assembly is integrally connected by brazing in a furnace or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a multi-flow type heat exchanger made of metal such as aluminum and used, for example, in a condenser for a car cooler.

2. Description of the Related Art In general, a multi-flow type heat exchanger, such as a condenser for a car cooler, has a pair of hollow headers (1) arranged in parallel, as shown in FIGS. 4 and 5.
(1), a large number of flat tubes (3) are passed in parallel and connected to the headers (1) (1), and corrugated fins (4) are arranged between the tubes (3). It has a unique structure.

Usually, in this multi-flow type heat exchanger, corrugated fins are installed on the outside of the outermost tube (3) to improve heat exchange efficiency, as shown in Figure 15.
4), and a side plate (52) for the purpose of protecting the fin (4) is disposed on the outside thereof. Note that (7) is a partition, (16) is an artificial tube, and (17) is an outlet tube.

The above heat exchanger is generally manufactured as follows.

That is, individually manufactured header (1), tube (3)
, corrugated fin (4), side play) (52)
Prepare heat exchanger components such as

Then, a large number of the tubes (3) are arranged in parallel,
In this state, the header (1) (
1), and then insert and arrange the corrugated fins (4) between the rear tubes (3). Next, a corrugated fin (4) is placed on the outside of the outermost tube (3), and a side plate (52) is placed on the outside of the corrugated fin (4).

Then, the expansion of the heat exchanger core in the arrangement direction of the tubes (3) due to the corrugated fins (4) being inserted between the tubes (3) is restricted, and the side plates (52) are temporarily placed in the positioned state. For the purpose of fixing the tube (3), the lengthwise middle part of the tube (3) including the side plate (52) is banded in a loop shape, and the whole is temporarily assembled.

In addition, in this way, the arrangement of the outermost corrugated fin (4) and the side plate (52) is changed to the header (1),
After mutually assembling the tube (3) and corrugated fin (4), we additionally installed the conventional side plate (5).
2) is due to the fact that the total length is shorter than the length of the interval between the headers (1) (1), as shown in FIG.

Thereafter, it is subjected to furnace brazing, etc. in that state, and the whole is joined and integrated to form a heat exchanger.

Problems to be Solved by the Invention However, as mentioned above, the side plate (5)
2) and the outermost corrugated fin (4), the header (1) (1), the tube (3), the corrugated fin (4)
) additionally assembling after the assembly of the heat exchanger increases the number of man-hours for the temporary assembly work, which in turn becomes a cause of hindering the improvement of the productivity of the heat exchanger.

In addition, since the side plate (52) and the outermost corrugated fin (4) were only positioned by banding in the temporarily assembled state, the position was particularly high in the width direction (in the heat exchanger's front-back direction). This tends to cause misalignment, which often results in the inconvenience of being brazed in a misaligned state.

This invention solves the above-mentioned conventional problems, reduces the number of man-hours for temporary assembly work, and improves productivity. It is an object of the present invention to provide a heat exchanger that can prevent misalignment and always connect both parts in a properly arranged state.

Means for Solving the Problems For the above purpose, the present invention provides two
A pair of hollow headers, a large number of tubes arranged in parallel between both headers, and both ends of which are connected to the header, and a corrugate arranged between adjacent tubes and outside the outermost tube. A heat exchanger having a fin and a side plate disposed outside the outermost corrugated fin, wherein both ends of the side plate are
The gist of the present invention is a heat exchanger that is fitted into fitting holes or recesses provided on mutually opposing surfaces of both headers.

Function In the heat exchanger described above, both ends of the side plate are fitted into the fitting holes or recesses provided on the mutually opposing surfaces of both headers, so that the temporary The pairing can be done as follows. That is, first, a large number of tubes are arranged in parallel, and a side plate is arranged outside the outermost tube in parallel with the tubes.

The header is then fitted onto the ends of the tube and side plate from both sides.

Then, corrugated fins are inserted between the tubes and between the outermost tube and the side plate. As a result, a tentatively assembled state is achieved.

In other words, the side plates can be placed in the same process as the tubes, and the outermost corrugated fins can be placed in the same process as the corrugated fins between the tubes.

In addition, since both ends of the side plate are fitted into the fitting holes or recesses provided on the mutually facing surfaces of both headers, it is possible that the side plate may be misaligned, especially its width, in the pre-assembled state before joining. Displacement in the direction is also restricted, and joining is achieved in a properly arranged state.

EXAMPLE Hereinafter, an example will be described in which the multi-flow type heat exchanger of this invention is applied to a condenser for a car cooler.

As mentioned above, this heat exchanger has headers (1) (1)
, tubes (3), corrugated fins (4), side plates (5), etc.

Header (1) (1) is made by forming an aluminum brazing sheet with a brazing material layer on both sides of the core material into a cylindrical shape so that both side edges are abutted, and the both side edges are connected to each other. , which are circular cross-sectional tubes joined by furnace brazing after temporary assembly, which will be described later. Note that a so-called electric resistance welded pipe whose side edges are joined by electric resistance welding, or a cylindrical aluminum extruded material whose side edges are joined in a butt state may also be used.

Further, in this embodiment, a partition plate (7) is arranged within the header (1) (1), so that the interior is divided into a plurality of chambers in the length direction. Note that in this invention, it is not essential to partition the inside of the header (1).

In addition, in the peripheral walls of the opposite sides of the headers (1) (1), as shown in FIG. is provided, and the end of the tube (3) is inserted into the header (1) in a fitted manner.

A side plate fitting hole (7) is provided outside the tube insertion hole (6) located at the end in the longitudinal direction of the header (1).

As will be described later, a fitting protrusion (9) formed at the end of the side plate (5) is inserted into the side plate fitting hole (7).

On the other hand, the tube (3) is made of a multi-hole flat aluminum extrusion material. In addition, it may be constructed by an electric resistance welded tube instead of the extruded type.

The corrugated fin (4) is formed of an aluminum bracing sheet whose core material is coated with a brazing material on one or both sides.

The side plate (5) has a narrow fitting protrusion (9) protruding outwardly formed at its end, and a stepped portion abutting the outer peripheral surface of the header (1) at its base. (10
) is said to have been formed.

Further, rising ribs (11) are formed at both end edges in the width direction of the side plate (4). This rib (11) is formed by being bent by pressing or the like, and the outer surface (15) of the bent portion is processed to be a curved surface, as shown in FIG.

Each of the above heat exchanger components (1), (3), (4), and (5) is
After they are temporarily assembled, the whole is joined and integrated by brazing or the like.

That is, in the temporary assembly, first, a large number of tubes (3) are arranged in parallel, and a side plate (5) is arranged on the outside of both outermost tubes (3). These placement operations are performed, for example, by inserting them into a support jig having a comb-like cross section.

Next, the header (1) (1) is fitted and arranged at both ends of the tube (3) and the side plate (5). This fitting is
The end of the tube (3) is inserted into the tube insertion hole (6) of the header (1), and the fitting protrusion (9) of the side plate (5) is inserted into the side plate fitting hole as shown in FIG. (8), respectively.

Then, between the tubes (3) and the outermost tube (3)
) and the side plate (5), a corrugated fin (4) is inserted and arranged. When inserting this corrugated fin (4), since the bent outer surface (15) of the base of the rib (11) of the side plate (4) is formed into a curved surface as described above, the outermost tube (3) The corrugated fin (4) can be inserted smoothly between the side plate (5) and the side plate (5) without getting caught.

In this temporarily assembled state, the side plate (5) has the fitting protrusion (9) at its end inserted into the side plate insertion hole (8) of the header (1).
Even if external force is applied for some reason, the position will not shift in the width direction. Moreover, since the stepped portion (1o) of the side plate (5) is brought into contact with the outer circumferential surface of the header (1) in this temporarily assembled state, no displacement occurs in the length direction thereof.

Furthermore, since the stepped portion (10) is in contact with the outer circumferential surface of the header (1), it is possible to easily set the interval between the headers (1) to an appropriate design dimension. This makes it possible to manufacture heat exchangers with excellent dimensional accuracy.

After the above-mentioned temporary assembly, the whole is banded, and the whole is joined and integrated by, for example, furnace brazing. In this joining work process, since the side plate (5) is fitted with the header (1) (1) as described above and held in a properly arranged state, the side plate (5) and the outermost corrugated fin (4) The inconvenience of joining in a misaligned state does not occur.

In the heat exchanger obtained as described above, the rib (11) of the side plate (5) may be used to attach a bracket to the vehicle body or a bracket to attach accessories. can.

As a modification of the fitting structure between the side plate (5) and the header (1) (1), as shown in FIG. (20), and this fitting portion (20)
) may be partially inserted into a fitting hole (21) formed in the header (1) and engaged in a positioned state. Even with such a structure, it is possible to prevent the side plate (5) from shifting in the width direction and length direction in the temporarily assembled state.

In addition, as shown in Fig. 7, the end of the side plate (5) is inserted for a predetermined length into the fitting hole (23) formed in the header (1) without any special processing. may be adopted.

Even in this case, displacement in the width direction is reliably prevented in the temporarily assembled state.

Further, the widthwise end edge of the side plate (5) may be formed into a shape that allows smooth insertion of the corrugated fin (4). 11), for example, the formation of the 8th
As shown in the figure, the end edge may be bent by a slight width in the direction opposite to the tube (3) to form a curved surface (25).

Alternatively, as shown in FIG. 9, a slope (26) may be formed by pounding or chamfering on the tube (3) side of the widthwise edge of the side plate (5).

Furthermore, as an example of a modification of the side plate (5), as shown in FIG. (1) A structure may be adopted in which the side plate fitting hole (27) of (1) is formed into a hole having the same shape as the tube insertion hole (6). In that case, use the same type of tool used to form the tube insertion hole (6) in the header (1) to form the side plate fitting hole (
27) is advantageous in manufacturing an isothermal exchanger that can be formed.

In addition, as another example of the fitting structure between the side plate (5) and the header (1) (1), as shown in Figure 11 (a) and (b), the peripheral wall of the header (1) is recessed. Then, a concave portion (29) that fits the narrow fitting protrusion portion (9) of the side plate (5) was formed, and the fitting protrusion portion (9) was fitted into this concave portion (29). structure may be adopted.

Alternatively, as shown in FIGS. 12(a) and 12(b), a concave portion (30) matching the shape of the unprocessed end of the side plate (5) is formed in the header (1). However, it is also possible to employ a structure in which the end of the side plate (5) is fitted into this recess (30).

Alternatively, a thirteenth
As shown in Figures (a) and (b), a narrow fitting protrusion (32) is formed, and the end face of the corrugated fin (4) is attached to the base of the fitting protrusion (32). A supporting bent piece (33) may be formed, and the tip of the fitting protrusion (32) may be fitted into the fitting recess (34) of the header (1). In any of the above structures, it is possible to prevent the side plates (5) from shifting in the width direction and length direction in the temporarily assembled state, and it is possible to always join the side plates in a properly arranged state.

Furthermore, as shown in FIG. 14, the header (1)
A semi-circular recess (36) is formed in the recess (36).
6) The end portion of the side plate (5) may be tightly fitted into the structure.

In that case as well, displacement of the side plate (5) in the width direction can be almost reliably prevented.

Effects of the Invention As described above, in the heat exchanger of the present invention, both ends of the side plates are fitted into the fitting holes or recesses provided on the mutually opposing surfaces of the side plates. From this, the heat exchanger can be temporarily assembled as follows. That is, first, a plurality of tubes are arranged in parallel, and a side plate is arranged outside the outermost tube in parallel with the tubes. Next, the header is connected and fitted to the ends of the tube and side plate from both sides. Then, a corrugated fin is inserted between the tubes and between the outermost tube and the side plate. This results in a temporary assembly state.

In other words, it is possible to arrange the side plates in the same process as the tubes, and to arrange the outermost corrugated fins in the same process as the corrugated fins between the tubes. can. Therefore, compared to the conventional case in which the side plate and the outermost corrugated fin must be additionally assembled after the tube and header corrugated fin are mutually temporarily assembled, the number of man-hours required for temporary assembly can be reduced.
As a result, productivity can be improved.

Moreover, since both ends of the side plate are fitted into the fitting holes or recesses provided on the mutually opposing surfaces of both headers as described above, the side plate is particularly Misalignment in the width direction can be reliably prevented, and the outermost corrugated fins and side plates can always be bonded and integrated to the heat exchanger in a properly arranged state.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the heat exchanger of the present invention, in which FIG. 1 is a perspective view showing the header, tubes, corrugated fins, and side plates in a separated state, and FIG.
The figure is a cross-sectional view showing the fitted state of the side plate and header, Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 2, Figure 4 is an overall front view of the heat exchanger, and Figure 5 is the same. FIG. FIGS. 6 and 7 are cross-sectional views showing modified examples of the fitting structure between the side plate and the header. FIG. 8 and FIG. 9 are sectional views showing modified examples of the side plate, respectively. FIG. 10 is a perspective view of still another modification showing the header, tubes, corrugated fins, and side plates in a separated state. Figures 11(a) and 11(b) are horizontal and vertical sectional views showing still another modification of the fitting structure between the side plate and the header, and Figures 12(a) and 12(b) are the side plate and header fitting structure. 13(a) and 13(b) are horizontal sectional views showing still other modified examples of the fitting structure between the side plate and the header. , a vertical sectional view, and FIG. 14 is a perspective view showing still another modification with the header, tube, and side plate separated. FIG. 15 is a front view showing a side plate portion of a conventional heat exchanger. (1)...Header (3)...Tube, (4)
... Corrugated fin, (5) ... Side plate, (8) (23) (27) ... Fitting hole, (
29) (30) (34) (3B) ... Concave part. Above 9

Claims (1)

[Claims] A pair of hollow headers arranged in parallel, a large number of tubes arranged in parallel between both headers and connected to the header at both ends, and a tube between adjacent tubes and an outermost tube. A heat exchanger having corrugated fins disposed on the outside of the header, and a side plate disposed on the outside of the outermost corrugated fin, wherein both ends of the side plate are on mutually opposing surfaces of both headers. A heat exchanger characterized in that the heat exchanger is fitted into a provided fitting hole or recess.