JP2504892Y2 - Heat exchanger pipe - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe used for a heat exchanger such as an air conditioner of an automobile.

[0002]

2. Description of the Related Art In a heat exchanger of an air conditioner, as shown in FIG. 4, a pressurized refrigerant (gas) flows from one pipe A into a flat tubular tube B and then flows into the other pipe C. It flows in a meandering manner from the pipe C through the tube B to the pipe A, forcibly radiating this refrigerant to make it a low temperature cooling liquid. The heat released at this time is transferred to the tube B, and the corrugated tube connected to the tube B is connected.
The air is transmitted to the tofin D and is blown out to the outside by the air blown to the corrugated toffin D.

The two pipes A and C have the same structure and are both partitioned in the longitudinal direction by a partition plate E as shown in FIGS. The refrigerant sent out from the pipe A on the left side of FIG. 4 is supplied to the upper tube B which is partitioned, and from the tubes B to the pipe C on the right side.
The refrigerant sent to the tube B of the lower stage is sent to the tube B of the lower stage, and the refrigerant sent from the tubes B to the pipe A is sent to the tube B of the lower stage. It is designed to flow while meandering in a large number of tubes B.
In this case, normally, the number of tubes is reduced in the lower stage where the refrigerant is liquefied and becomes difficult to flow, so that the liquefied refrigerant can easily flow into the tube.

As shown in FIG.
A large number of horizontally long insertion holes F for inserting the tabs B are formed by pressing, and the tubes B are inserted in the insertion holes F.
After the insertion, the tube B and the periphery of the same insertion hole F and the fin D are fixed by being fixed to each other so that the refrigerant does not leak from the same insertion hole F.

[0005]

The above-mentioned insertion hole F has a rim portion X at the central portion in the longitudinal direction which is recessed inward as shown in FIGS. The inner peripheral surface G does not become a depression, but becomes a vertical cut surface as it is as the press cutting surface. Therefore, the central portion in the width direction of the tube B is easily guided by the recess when being inserted into the insertion hole F,
If both ends of the tube B in the width direction are inclined with respect to the insertion hole F or are displaced, it is very difficult to insert the tube B.
Moreover, if the tube B is forcibly inserted at an angle, it will be difficult to pull it out, and it will take time and effort to reinsert the tube, resulting in a very troublesome assembly.

The object of the present invention is to insert the tube easily and to insert the tube straight without bending.
It is intended to provide a pipe for a heat exchanger having a sufficiently large mounting area.

[0007]

In the heat exchanger pipe of the present invention, horizontally long insertion holes F for inserting the tubes B through which the refrigerant flows are provided at arbitrary intervals in the longitudinal direction as shown in FIG. 1 (a). In a plurality of heat exchanger pipes, the same insertion holes F are press-molded, and as shown in FIG. 1 (b), parallel portions are formed inside the inner peripheral surface G of the longitudinal ends of the insertion holes F in the thickness direction. J is provided, and the insertion guide portion 2 that is wider on the outer side in the thickness direction than the parallel portion J of the inner peripheral surface G is continuously press-molded with the parallel portion J, and the outside of the insertion guide portion 2 is provided. Further, a guide protrusion 2a which is continuous with that and expands outward is formed so as to protrude outward from the outer peripheral surface 5 of the pipe 1.

[0008]

In the heat exchanger pipe of the present invention, as shown in FIG. 1 (b), the insertion hole F is press-formed and is parallel to the inner side in the thickness direction of the inner peripheral surface G at the longitudinal end of the insertion hole F. The portion J is provided, and the insertion guide portion 2 that expands outward in the thickness direction of the inner peripheral surface G from the parallel portion J is continuously press-molded with the parallel portion J. The guide protrusion 2a, which extends outwardly and continuously to the outside, is provided on the outer peripheral surface 5 of the pipe 1.
Since it is formed so as to project further outward, when the tube B to be inserted into the same insertion hole F is inserted, the tube B is inserted.
Is slightly bent in the width direction or is displaced,
The tube B is guided and inserted into the insertion hole F by the guide protrusion 2a that expands outward and the insertion guide portion 2 that is continuous with and inside the guide protrusion 2a.

Further, since the insertion guide portion 2 and the parallel portion J are formed continuously, the tube is guided by the guide protrusion 2a and the insertion guide portion 2 and inserted halfway into the insertion hole F. B is inserted into the parallel portion J as it is, the bend is forcibly corrected, and inserted into the tube B vertically (straightly).

Further, since the guide protrusion 2a which spreads outward and the insertion guide portion 2 are continuously formed in the insertion hole F, when the tube B is inserted into the insertion hole F, FIG.
As shown in FIG. 3, a hollow portion (low pool) 4 is formed between the tube B and the guide protrusion 2a and the insertion guide portion 2, and the pipe 1
The row 8 (FIG. 7) provided on the surface of the dent 4 is
It easily flows into and accumulates. In addition, it becomes easy to put a rod separate from the pipe 1 in the hollow portion 4. Therefore, the brazing of the tube B becomes reliable and strong, the brazing strength is improved, and the refrigerant is less likely to leak from the brazing portion.

The guide protrusion 2a and the insertion guide portion 2 are also provided.
Of the guide protrusion 2a at the same time as the insertion hole F is press-formed, since
Also, the insertion guide portion 2 can be formed. Further, since the guide protrusion 2a and the insertion guide portion 2 are formed by pressing (pressing) outwardly and not by cutting, they are not formed by cutting, and therefore the guide protrusions 2a and the insertion guide portion 2 are provided on the periphery of the insertion hole F. 8 (FIG. 7) is not removed when the guide protrusion 2a and the insertion guide portion 2 are molded, and brazing is ensured.

[0012]

Embodiment 1 FIG. 1 shows an embodiment of a heat exchanger pipe of the present invention. Reference numeral 1 shown in the figure is a pipe, and this pipe 1
Insertion holes F for inserting the tubes B at arbitrary intervals in the longitudinal direction are formed by press working. As shown in FIGS. 5 and 6, the rim X of the insertion hole F at the central portion in the longitudinal direction is largely curved inward when the insertion hole F is pressed, and the tube B is formed only in the lateral direction of the insertion hole F. Instead, even if it is slightly misaligned or bent in the vertical direction,
The orientation of the tube B is forcibly corrected and inserted vertically so that the assembly of the tube B can be automated.

Further, as clearly shown in FIGS. 1 (b) and 2, a parallel portion J is provided inside the inner peripheral surface G of the end portion in the longitudinal direction of the insertion hole F in the thickness direction, and the inner periphery thereof is formed. The insertion guide portion 2 that expands outward in the thickness direction of the parallel portion J of the surface G is continuously pressure-molded with the parallel portion J, and further extends outward on the outside of the insertion guide portion 2 continuously. The guide protrusion 2a is formed so as to project outward from the outer peripheral surface 6 of the peripheral portion G.

The guide protrusion 2a and the insertion guide portion 2 described above.
When inserting the tube B into the insertion hole F, even if the tube B is bent obliquely in the width direction or is displaced laterally, the end of the tube B in the width direction is The parallel portion J guides the portion to facilitate insertion, and the parallel portion J corrects the direction of the tube B inserted in a bent state by being guided by the insertion guide portion 2 so as to be straight with respect to the pipe. It is a thing.

The guide protrusion 2a and the insertion guide portion 2
For example, as shown in FIG. 2, the pipe 1 is pressed in the direction of the arrow in FIG. 2 by the punching punch 7 provided with the protrusion 6 having the same shape as the guide protrusion 2a and the insertion guide portion 2 to form the insertion hole F. By punching, the insert hole F is formed by pressing once, and at the same time, the meat of the inner peripheral surface G at the longitudinal end of the insert hole F is pressed outward.

When the guide protrusion 2a is formed in the insertion hole F, when the tube B is inserted into the insertion hole F,
Since the recess 4 formed between the tube B and the pipe 1 is larger than the case where only the insertion guide 2 is provided,
The attachment area is further widened as compared with the case where only the insertion guide portion 2 is provided, and the attachment strength is improved. The illustrated guide protrusion 2a
The insertion guide portion 2 is formed on the inner peripheral surface G at both ends in the longitudinal direction of the insertion hole F, but may be formed only on the inner peripheral surface portion G at either one end.

The guide protrusion 2a and the insertion guide portion 2 are designed so that only the outer side in the thickness direction of the inner peripheral surface G at the longitudinal end of the insertion hole F is expanded outward at the same time when the insertion hole F is pressed. The guide protrusion 2a is formed so as to protrude outward from the outer peripheral surface 5 of the pipe 1 while being pressed and deformed into a taper that spreads outward.

As the tube B, the one previously filed by the inventor of the present application may be used (Practical application 1-76643).
issue). This tube has an insertion regulating portion for regulating the insertion length into the pipe on its peripheral wall, so that the tube can be inserted into the pipe.
This is to ensure that the insertion length of the protrusion can be made constant. By using this tube and the pipe 1 of the present invention, the assembling thereof becomes extremely easy and the assembling can be automated.

The illustrated pipe 1 is a single round pipe, but the pipe 1 may be a circular pipe formed by combining two half-split pipes, or other shapes and structures. good.

[0020]

[Embodiment 2] Although the guide protrusion 2a and the insertion guide portion 2 in FIG. 1B are linear and taper outward, the guide protrusion 2a and the insertion guide portion 2 are curved as shown in FIG. (R) can also be made to spread outward.

[0021]

The heat exchanger pipe of the present invention has the following effects. . Since the insertion guide portion 2 and the guide protrusion 2a which are widened outward are formed on the outer side in the thickness direction of the inner peripheral surface G at the longitudinal end of the insertion hole F, the tube B is inserted in the insertion hole F. When inserting, tube B bends a little in its width direction,
Even if the position is deviated, the tube B is guided by the guide protrusion 2a and the insertion guide portion 2 that spread outward, and the tube B can be easily inserted. . Since the insertion guide portion 2 is formed continuously with the parallel portion J, the tube B guided by the guide protrusion 2a and the insertion guide portion 2 and inserted halfway, the parallel portion J thereafter.
This corrects the bend and inserts it into the tube B vertically (straightly), improving assembly accuracy and ensuring brazing. . Since the guide hole 2a and the insertion guide portion 2 which spread outward are formed in the insertion hole F, when the tube B is inserted into the insertion hole F, the tube B, the guide protrusion 2a, and the insertion guide portion are formed. A recess (low pool) 4 is created between 2 and
The loading area becomes wider, and the rows 8 provided on the surface of the pipe 1 flow into the recesses 4 and easily accumulate.
In addition, it becomes easy to put a rod separate from the pipe 1 in the hollow portion 4. Therefore, the brazing of the tube B to the pipe 1 becomes reliable and strong, the mechanical strength is improved, and the refrigerant hardly leaks from the brazed portion. . Since the insertion guide portion 2 is formed outwardly by pressing (pressing), the insertion guide portion 2 can be formed at the same time when the insertion hole F is press formed, and workability is good. Further, since the insertion guide portion 2 is formed by pressure and is not formed by cutting, the row 8 (FIG. 7) provided at the peripheral portion of the insertion hole F is not removed when the insertion guide portion 2 is formed. , Brazing will be reliable. . Since the guide protrusion 2a and the insertion guide portion 2 are molded outwardly by pressure (press), the guide protrusion 2a
Also, only the meat of the inner peripheral surface G of the insertion guide portion 2 is deformed by the pressure applied when the insertion / insertion guide portion 2 is molded. Not bulky.

[Brief description of drawings]

1A is a perspective view showing a first embodiment of a heat exchanger pipe of the present invention, FIG. 1B is a sectional view taken along the line AA of FIG. 1A, and FIG. ) Z arrow view.

FIG. 2 is an explanatory view showing a second embodiment of the heat exchanger pipe of the present invention.

FIG. 3 is an explanatory view of a heat exchanger.

FIG. 4 is a use explanatory diagram showing the flow of refrigerant in the heat exchanger.

FIG. 5 is a perspective view showing an example of a conventional heat exchanger pipe.

FIG. 6 is a longitudinal section of a pipe portion of a conventional heat exchanger.

7A is an explanatory view of a brazing state of the heat exchanger pipe of the present invention shown in FIG. 1B, and FIG. 7B is a brazing state of the heat exchanger pipe of the present invention shown in FIG. Explanatory drawing.

[Explanation of symbols]

 1 pipe 2 insertion guide part 2a guide protrusion 5 outer peripheral surface B tube F insertion hole G inner peripheral surface J parallel part

Claims (1)

(57) [Scope of utility model registration request] 1. A heat exchanger pipe in which a plurality of horizontally long insertion holes (F) into which a refrigerant flow tube (B) is inserted are formed in the longitudinal direction at arbitrary intervals, and the same insertion hole (F) is provided.
Is press-molded, and a parallel portion (J) is provided on the inner side in the thickness direction of the inner peripheral surface (G) at the longitudinal end of the insertion hole (F). The insertion guide portion (2), which spreads outwardly in the thickness direction outside J), is continuously pressure-molded with the parallel portion (J) and spreads outwardly outside the insertion guide portion (2). 2. The heat exchanger pipe, wherein the guide protrusion (2a) is formed so as to protrude outward from the outer peripheral surface (5) of the pipe (1).