JPH1029U - Mounting structure of heat exchanger - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a heat exchanger mounting structure that is easy to manufacture and has high strength by using the cap of the header tank when mounting the heat exchanger on the vehicle body side. The tubes 2 and the fins 3 are alternately stacked, and header pipes 4 are provided on both sides of the tubes 2. Each end of the tubes 2 is inserted into an insertion hole 7 formed in the header pipe 4. In the heat exchanger 1 joined by brazing, a blind cap 14 attached to the opening of the header pipe 4 and having a hole 14a formed therein, a circular flange 16 and the flange on the center line of the flange. On one surface side, there is provided an engagement projection 17 which fits into the vehicle body side attachment portion.
On the other surface side, a tubular temporary attachment portion 18 and a connecting member 15 each protruding were provided, and the temporary attachment portion 18 of the connection member 15 was temporarily fixed to the hole 14 a of the blind cap 14.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure of a heat exchanger when the heat exchanger is mounted on a vehicle body.

[0002]

[Prior art]

 As a conventional heat exchanger, a so-called parallel flow type heat exchanger in which a plurality of tubes and fins are alternately stacked, and a header pipe is connected to both ends of the plurality of tubes is known. Examples of the mounting structure when this type of heat exchanger is mounted on the vehicle body include, for example, (1) Japanese Utility Model Laid-Open No. 63-142586, (2) Japanese Utility Model Laid-Open No. 64-8080, and (3). The one described in Japanese Utility Model Application Laid-Open No. 63-142585 is known.

In (1), a lower blind cap having an engagement projection is attached to a lower end opening of the header pipe, and an upper blind cap having a locking recess is mounted to an upper end opening of the header pipe. A cap is installed. The locking projection of the lower cap is engaged with the locking portion of the lower vehicle body-side bracket via a rubber member, while the upper cap is connected via a projection rubber member protruding from the upper vehicle body-side bracket. It is designed to be mounted by engaging inside the locking recess.

In the above (2), a screw hole is formed in the lower blind cap, and the vehicle body-side bracket is attached to the screw hole by screwing it with a bolt.

[0005] In the above (3), a structure in which an end of a metal bracket having an engagement protrusion is held and joined from the periphery of the header pipe, and the engagement protrusion is attached to the vehicle body-side bracket by being engaged. And

[0006]

[Problems to be solved by the invention]

 However, in (1) and (2), since the header pipe has a circular pipe structure, each blind cap can be easily formed by rotary cutting, but the positions of the engagement projections, the locking recesses, and the screw holes are different from those of the header pipe. Therefore, depending on the type of vehicle, there is an inconvenience that the bracket on the vehicle body side must be adapted to the header pipe each time. In addition, since the vehicle body side bracket is attached to each blind cap, the strength of the blind cap is reduced, and there is a risk of refrigerant leakage.

[0007] Further, in the above (3), since the header pipe is held at one end of the metal bracket, the structure of the bracket is complicated and large, and there is an inconvenience that it takes time to manufacture. Also, since the load is received not by the header pipe but by the lower support plate of the heat exchanger, there was a problem in terms of support strength.

Further, in recent years, a header pipe having a two-part structure has been adopted from the viewpoint of saving of refrigerant and tube assembling property. However, in the above (1) to (3), the header pipe has a two-part structure. In this case, there is a problem that it is difficult to apply since the cross-sectional shape of the header pipe is not circular.

In view of the above, an object of the present invention is to provide a heat exchanger mounting structure which can be applied not only to a header pipe having a circular pipe structure but also to a header pipe having a two-part structure, and can solve the above-mentioned disadvantages. And

[0010]

[Means for Solving the Problems]

 The mounting structure of the heat exchanger according to the present invention is such that tubes and fins are alternately laminated, header pipes are provided on both sides of the tubes, and each end of these tubes is inserted into an insertion hole formed in the header pipe. In a heat exchanger which is inserted and joined by brazing, a blind cap attached to the opening of the header pipe and forming a hole, a circular flange portion and a center line of the flange portion of the flange portion are provided. On one surface side, there is provided an engagement protrusion for fitting to the vehicle-body-side mounting portion, and on the other surface side, a cylindrical temporary attachment portion, and a connecting member projecting therefrom. This is a mounting structure for a heat exchanger having a configuration in which a temporary attachment portion is temporarily fixed to the hole of the blind cap.

[0011]

[Action]

 In such a heat exchanger, a large number of tubes stacked with fins interposed are inserted into the insertion holes of the header pipe, and a blind cap to which a connecting member is temporarily attached is provided at the opening of each header pipe. Are assembled, and these are joined together by brazing.

[0012] At this time, the temporary attachment portion formed integrally with the flange portion on the other surface side is locked in the hole portion of the blind cap, so that the connecting member and the blind cap are connected. The heat exchanger is mounted on the bracket (mounting portion) on the vehicle body side via these connecting members and the blind cap. In practice, an isolator or the like is interposed in the engaging protrusion of the connecting member, and is engaged with the attaching portion on the vehicle body side to be attached.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In the heat exchanger 1 of the present embodiment, as shown in FIGS. 1 and 2, each flat tube 2 is alternately laminated with a corrugated fin 3, and a plurality of flat tubes 2 are provided on both sides thereof. Header pipe 4 is connected. A partition plate 8 is provided at a required position in each header pipe 4 to meander the refrigerant flow path. The refrigerant flows from an inlet joint 10 attached to one header pipe 4 (right side in the figure), and the other. The refrigerant is discharged from the outlet joint 11 attached to the header pipe (left side in the figure) 4. In the figure, reference numeral 12 denotes a side plate.

As shown in FIG. 3 and FIG. 4, each of the header pipes 4 is provided in a structure that is divided into an end plate 6 and a tank 5 in a radial direction (tube insertion direction). That is, both the end plate 6 and the tank 5 are formed into a curved surface which bulges outward, and the end plate 6 is joined with the joint portion of the end plate 6 inside the joint portion of the tank 5 to form a substantially elliptical cross-sectional shape. Have been. The end plate 6 is provided with a large number of insertion holes 7, and the ends of the flat tubes 2 are inserted into these insertion holes 7 and joined by integral brazing. Therefore, since the header pipe 4 is formed to have an elliptical cross section, the refrigerant volume in the header pipe 4 can be reduced, and the refrigerant can be saved.

Further, in the present embodiment, as shown in FIG. 1, the upper and lower ends of each header pipe 4 are aligned with the upper and lower positions of a bracket (mounting portion) 21 on the vehicle body side, as indicated by a dimension L. It is formed in an elongated shape, and a partition plate 9 is provided along with it. In addition, blind caps 14 are respectively attached to the upper and lower openings of each header pipe 4, thereby closing each opening. As shown in FIG. 4, the blind cap 14 is formed by press molding or the like into a shape corresponding to the shape of the opening of the header pipe 4, and fitted and attached from the outside.

A connection member 15 is attached to the blind cap 14, and the connection member 15 is composed of a flange portion 16, an engagement protrusion 17, and a temporary attachment portion 18 in this embodiment. That is, as shown in FIGS. 3 and 5, the flange portion 16 has a circular planar shape in contact with the outer flat surface of the blind cap 14, and has one surface on the central axis of the flange portion 16. A solid engagement projection 17 is provided on the other surface side with a cylindrical temporary attachment portion 18 protruding therefrom, so that it can be easily manufactured by rotary cutting. Then, the temporary attachment portion 18 is inserted into the hole 14 a formed in the blind cap 14 and temporarily attached.

For temporary attachment, the temporary attachment portion 18 of the connecting member 15 is inserted into the hole 14 a of the blind cap 14, and then the tubular temporary attachment portion 18 is expanded as shown by an arrow in the figure. Then, blind caps 14 are attached to the respective openings of the header pipe 4 to which the flat tubes 2 and the like are attached, and joined by integral brazing. As shown in FIG. 3, the connecting projection 17 of the connecting member 15 joined to the blind cap 14 is engaged with a bracket (mounting portion) 21 on the vehicle body side with a rubber isolator 20 interposed therebetween. Attached to the side.

Accordingly, even in the case of a header pipe having a two-part structure in which the cross-sectional shape does not become circular, the connecting member is joined to the blind cap and attached to the vehicle body by the connecting member, so that the connecting member rotates. Can be easily manufactured by cutting. Further, by changing the position of the hole of the blind cap, the position of the engaging projection of the connecting member can be selected within a finite range, so that it is possible to standardize the vehicle body side bracket. Further, a metal bracket as in the related art is not required, and a load is applied to the header pipe, so that the supporting strength is improved. In addition, since the connecting member is integrally joined to the blind cap, the strength of the blind cap itself can be increased.

In this example, since the header pipe has a two-part structure, the flat tube can be inserted into the end plate and then joined to the tank, so that tube assemblability is improved and the header pipe is traversed. Since the area can be made substantially elliptical and the capacity can be reduced, the refrigerant can be saved.

[0021]

[Effect of the invention]

 As described above, according to the present invention, the connecting member is attached to the blind cap of the header pipe, and is attached to the vehicle body via the connecting member. In particular, the temporary attaching portion integrally formed with the flange portion is provided. Since the locking member is locked in the hole of the blind cap, the connecting member and the blind cap are connected. Therefore, the heat exchanger is connected to the bracket (mounting portion) on the vehicle body side via the connecting member and the blind cap. Since it can be attached, it can be easily applied not only to a pipe with a circular cross section but also to a header pipe with a two-part structure with a non-circular cross section. It is possible to ensure the improvement of the performance and the saving of refrigerant.

Further, since the blind cap and the connecting member can be manufactured separately, there is an advantage that the connecting member can be easily manufactured by rotary cutting even if the header pipe is not circular in cross section.

Further, since the joining position of the connecting member can be easily changed, it is possible to standardize the bracket on the vehicle body side.

Furthermore, since a metal bracket as in the prior art is not required, the load can be supported by the header pipe to increase the supporting strength, and the connecting member is joined to the blind cap. It is also possible to increase the strength of itself.

[Brief description of the drawings]

FIG. 1 is a front view showing a heat exchanger according to the present invention.

FIG. 2 is a plan view showing the heat exchanger according to the present invention.

FIG. 3 is a longitudinal sectional view of a blind cap and a connecting member according to the present invention.

FIG. 4 is a sectional view taken along the line III-III in FIG. 3;

FIG. 5 is a plan view of the connecting member used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Tube 3 Fin 4 Header pipe 5 Tank 6 End plate 7 Insertion hole 8 Partition plate 9 Partition plate 10 Inlet joint 11 Outlet joint 12 Side plate 14 Blind cap 14a Hole 15 Connection member 16 Flange 17 Engagement projection Part 18 Temporary attachment part 20 Isolator 21 Bracket

Claims (1)

[Utility model registration claims] 1. A tube and a fin are alternately laminated, and a header pipe is provided on both sides of the tube. Each end of the tube is inserted into an insertion hole formed in the header pipe and joined by brazing. A blind cap attached to the opening of the header pipe and forming a hole, a circular flange and a vehicle body on one surface side of the flange on the center line of the flange. A connecting member having an engaging projection fitted to the side mounting portion and a tubular temporary attaching portion protruding from the other surface side, and the temporary attaching portion of the connecting member is provided by the blind cap. Characterized in that the hole is temporarily fixed to the hole.