JP2581387Y2 - Capacitor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor used in an air conditioner of a motor vehicle, and more particularly to a capacitor of a parallel flow type.

[0002]

2. Description of the Related Art FIGS. 4 to 8 show an example of a condenser (condenser) conventionally used for an air conditioner of an automobile. FIG. 4 shows a model called a parallel flow type.

In FIG. 1, reference numeral 1 denotes a heat-dissipating fin, and the fins 1 are attached to the outer circumferences of a plurality of tubes 2 respectively. The tube 2 is for flowing a refrigerant (not shown) made of a gas or a liquid therein.

In the drawing, reference numerals 3 and 3 denote a pair of header pipes, and the header pipes 3 and 3 are disposed at both ends of each tube 2.
The tubes 2 are connected so as to be able to communicate with each other. Each of the header pipes 3 is formed in a circular cross section, and blind plugs 4 are fitted to upper and lower ends thereof, respectively.

[0005] A plurality of through holes 5 are formed in a slit shape at predetermined intervals along one longitudinal side of the header pipes 3, 3 on one side of the side surfaces of the pair of header pipes 3, 3 respectively. (See FIG. 5).

The through holes 5 are for engaging the ends of the tubes 2 with each other to allow the refrigerant to communicate with the tubes 2, whereby the refrigerant is supplied from the inlet, and Header pipe 3 and each tube 2
Is guided to the above-mentioned exit part (actual opening flat 2-3)
No. 2421).

The inlet for receiving the supply of the refrigerant, the outlet for discharging the refrigerant, the means for regulating the flow of the refrigerant, and the means for fixing the condenser to the vehicle body (not shown) are not shown. ing.

In order to assemble the capacitor constructed as described above, first, one end of the tube 2 is inserted into the through hole 5 of one header pipe 3, and then the other end is inserted into the other header pipe 3. Repeat, all the tubes 2 are bridged between the pair of header pipes 3,3.

Then, after the fins 1 are interposed between the tubes 2, the fins 1 and the tubes 2 are brazed in a furnace (not shown) to complete the condenser assembling operation.

[0010]

In the above-mentioned capacitor, since the cross-sectional shape of the header pipe 3 is circular, when the tube 2 is inserted into the through-hole 5, it faces the through-hole 5 as shown in FIG. Inner wall 6 of header pipe 3
The tube 2 is not positioned with respect to the radial direction of the header pipe 3 until it abuts.

When the tube 2 is positioned in the radial direction of the header pipe 3 as shown in FIG. 7 and the gap between the end of the tube 2 and the inner wall surface 6 of the header pipe 3 is minimized, the refrigerant Distribution is easily blocked.

In order to provide a sufficient gap between the end of the tube 2 and the inner wall surface 6 of the header pipe 3 as shown in FIG. 8, the distance Δx is smaller than the diameter of the header pipe 3 perpendicular to the insertion direction of the tube 2. When the tubes 2 are inserted into the through holes 5 near the through holes 5, not all the tubes 2 are positioned in the directions of the left and right header pipes 3 and 3 in FIG.

Therefore, there is a problem in that the resistance value of the refrigerant flowing in the header pipe 3 is increased, thereby lowering the heat exchange efficiency.

Accordingly, the present invention provides a capacitor in which the tube 2 is positioned in the radial direction of the header pipe 3 and the gap between the end of the tube 2 and the inner wall surface 6 of the header pipe 3 is sufficiently provided. Aim.

[0015]

According to the present invention, in order to achieve the above-mentioned object, a plurality of tubes having heat radiation fins mounted on the outer periphery thereof are joined to an end of the tubes, and the refrigerant is supplied to the tubes. In a capacitor comprising a pair of header pipes each having a through hole projecting at a predetermined interval for communicating with each other, the cross-sectional shape of each of the pair of header pipes is changed to a semicircular portion, and the semicircular portion. A flat portion that closes the open portion and a small radius of curvature located at the boundary between the semicircular portion and the flat portion are formed into a substantially semicircular shape as a whole, and the flat end portion or the small radius of curvature portion < and a through-hole for penetrating the tube is provided so that an end of the tube penetrating the through-hole abuts on a boundary between the circular portion and the small radius of curvature.

[0016]

With this configuration, when the end of the tube is inserted from the opening of the through hole, the end of the tube is inserted immediately after the insertion.
Hitting the boundary between the circular part and the small radius of curvature
Makes it easy to position with respect to the header pipe.
it can. At the same time, the header pad at the end of the tube
The degree of insertion into the pipe can be made constant.

[0017]

FIG. 1 shows a capacitor according to an embodiment of the present invention.
3 to FIG. 8, the same members as those in FIGS. The cross-sectional shape of the pair of header pipes 7 according to the present invention is defined as a semi-circular portion R, a flat portion F closing an open portion of the semi-circular portion R, a semi-circular portion R and a flat portion. And a small radius of curvature r located at the boundary of F. A through-hole 8 is formed in the flat end portion F or the small radius of curvature r to penetrate the tube 2, and the end of the tube 2 penetrated through the through hole 8 is a boundary between the circular portion R and the small radius of curvature r. It is configured to hit the part.

The size of the opening of the through hole 8 is
Slightly smaller than the outer diameter of the tube 2 inserted in
So that they are tightly joined when inserted.

When assembling the capacitor of the present invention thus constructed, first, a pair of header pipes 7 and 7 are assembled.
Are made to face each other, and one header pipe 7
One end of the tube 2 is inserted into the through hole 8. At this time, one end of the tube 2 starts to be inserted into the through hole 8.
When you proceed inward by Δy immediately from the
It hits the boundary between R and the small radius of curvature r.

Thus, the header pipe 7 of the tube 2
Can be easily positioned with respect to the tube 2
The gap between the tip of the
It can be ensured that the circulation of the medium can be performed well.

Subsequently, the other end of the tube 2 is inserted into the other header pipe 7 in the same manner as described above , and
And repeat the same. Then, all the tubes 2 are bridged between the pair of header pipes 7. As a result, all the tubes 2 are connected to the left and right header pipes 7 in FIG.
7 is positioned.

The tube 2 is located between the pair of header pipes 7,7.
Correctly inserted into the pair of header pipes
7, 7 are held in facing directions. All tubes
2 is complete, insert fins between each of tubes 2
1 and then put them all in a furnace and
And the tube 2 are brazed. Thereby, the assembly work of the capacitor is completed.

[0023]

[Effects of the Invention] The present invention is a capacitor configured as described above.
When inserting the tube into the header pipe ,
Positioning can be performed easily and reliably.
And As a result, work time can be reduced, so workability
And increase productivity.

The end of the tube is the inner wall of the header pipe.
Abuts, preventing the strength from dropping due to the abutment.
It is. And the end of the tube and the inner wall facing the header pipe
Since the gap with the surface does not become small, the inside of the header pipe
Since there is no flow path resistance in the refrigerant flowing through the
Can be suppressed and product reliability can be improved.
You.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a capacitor according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a header pipe and a mounting bracket of the capacitor.

FIG. 3 is a sectional view showing a header pipe of the capacitor.

FIG. 4 is a perspective view showing a conventional example.

FIG. 5 is a perspective view showing a part of the header pipe of FIG. 4;

FIG. 6 is a sectional view showing the header pipe of FIG. 5;

FIG. 7 is a plan view showing the header pipe of FIG. 6;

FIG. 8 is a plan view showing a state different from FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fin 2 Tube 7 Header pipe 8 Through hole 9 Inner wall surface F Flat part R Circular part r Small curvature radius part

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of tubes having heat radiation fins mounted on the outer periphery thereof , and through holes which are joined to ends of the tubes and which allow the refrigerant to communicate with the tubes at predetermined intervals. A pair of header pipes, the cross-sectional shape of the pair of header pipes, each semi-circular portion, a flat portion closing the open portion of the semi-circular portion, and the semi-circular portion A small radius of curvature portion located at the boundary of the flat portion is formed into a substantially semicircular shape as a whole, and a through hole is provided in the flat end portion or the small radius of curvature portion to penetrate the tube, and the through hole is provided. A capacitor characterized in that an end of a tube penetrated through a hole abuts on a boundary between the circular portion and a small radius of curvature.