JPH072779U - Heat exchanger pipe - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pipe for a heat exchanger in which the tube can be easily inserted, and the tube can be inserted straight without bending, and the tube can have a sufficiently large loading area. To do. [Structure] In a heat exchanger pipe in which a large number of horizontally long insertion holes F for inserting a tube B through which a refrigerant flows are formed at arbitrary intervals in the longitudinal direction, the insertion holes F are formed by press molding. A parallel portion J is provided inside the inner peripheral surface G at the end in the longitudinal direction in the thickness direction, and the insertion guide portion 2 that expands outward in the thickness direction from the parallel portion J of the inner peripheral surface G is defined as the parallel portion J. Continuous pressure molding was performed, and a guide protrusion 2a that spreads outwardly was formed outside the insertion guide portion 2 so as to protrude outward from the outer peripheral surface 5 of the pipe 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe used for a heat exchanger such as an air conditioner of an automobile.

[0002]

[Prior art]

 In the heat exchanger of the air conditioner, as shown in FIG. 4, the pressurized refrigerant (gas) passes from one pipe A to the inside of the flat tubular tube B to the other pipe C, and then from the pipe C to the tube. It flows meanderingly into the pipe A through the bub B, and forcibly radiates this refrigerant to make it a low-temperature cooling liquid. The heat released at this time is transferred to the tube B, transferred to the corrugated fins D connected to the tube B, and dissipated to the outside by the air blown to the corrugated fins 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. Then, the refrigerant sent from the pipe A on the left side of FIG. 4 is supplied to the upper tube B which is partitioned, and the refrigerant sent from the tubes B to the pipe C on the right side is separated from the tubes of the lower stages. -The refrigerant sent to the tube B and sent back from the tube B to the pipe A is sent to the tube B in the lower stage and flows in the many tubes B while meandering. It is. 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. 5, a large number of horizontally long insertion holes F for inserting the tubes B are formed in the pipe A by press working, and the tubes B are inserted into the insertion holes F. After that, the periphery of the tube B and the same insertion hole F and the fin D are fixed by being fixed so that the refrigerant does not leak from the same insertion hole F.

[0005]

[Problems to be solved by the device]

 As shown in FIGS. 5 and 6, the above-mentioned insertion hole F has a dented portion X in the central portion in the longitudinal direction which is recessed inward, but the inner peripheral surface G at the end portion in the longitudinal direction of the insertion hole F does not dent, A vertical cut is made with the press cut surface. Therefore, the center portion of the tube B in the width direction is easily guided by the recess when it is inserted into the insertion hole F, but both end portions of the tube B in the width direction are inclined with respect to the insertion hole F, It is very difficult to insert it if it is misaligned. 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 B, and the assembly will be very troublesome.

An object of the present invention is to provide a pipe for a heat exchanger in which the tube can be easily inserted, the tube can be inserted straight without bending, and the tube can have a sufficiently large loading area. Here it is.

[0007]

[Means for Solving the Problems]

 The heat exchanger pipe of the present invention has a plurality of horizontally elongated insertion holes F for inserting the tubes B through which the refrigerant flows, as shown in FIG. 1A, for a heat exchanger. In the pipe, the same insertion hole F is press-formed, and as shown in FIG. 1 (b), a parallel portion J is provided inside the inner peripheral surface G at the longitudinal end of the insertion hole F in the thickness direction. The insertion guide portion 2 that expands outward in the thickness direction of the parallel portion J of the surface G is continuously press-molded with the parallel portion J, and extends outside the insertion guide portion 2 continuously and outwardly. The guide protrusion 2a is formed so as to protrude outward from the outer peripheral surface 5 of the pipe 1.

[0008]

[Action]

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

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

Moreover, since the guide protrusion 2a that 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, it is shown in FIG. As shown in FIG. 7, a hollow portion (row pool) 4 is formed between the tube B and the guide protrusion 2a and the insertion guide portion 2, and the row 8 (FIG. 7) provided on the surface of the pipe 1 is the hollow portion. It flows into the part 4 and becomes easy to accumulate. In addition, it becomes easy to assemble a rod, which is separate from the pipe 1, into the hollow portion 4. Therefore, the brazing of the tube B becomes reliable and strong, the brazing strength is improved, and the refrigerant is unlikely to leak from the brazing portion.

Further, since the guide protrusion 2a and the insertion guide portion 2 are formed so as to spread outward by pressing (pressing), the guide protrusion 2a and the insertion guide portion 2 are formed at the same time when the insertion hole F is press-formed. You can also Further, since the guide protrusion 2a and the insertion guide portion 2 are formed outwardly by pressing (pressing) and are not formed by cutting, they are provided in the peripheral portion of the insertion hole F. The brazing 8 (FIG. 7) is not removed during the molding of the guide protrusion 2a and the insertion guide portion 2, 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 drawing is a pipe, and insertion holes F for inserting the tubes B at arbitrary intervals in the longitudinal direction of the pipe 1 are formed by press working. The rim X of the center portion of the insertion hole F in the longitudinal direction is largely curved inward when the insertion hole F is pressed as shown in FIGS. 5 and 6, and the tube B is arranged in the lateral direction of the hole F. Not only that, even if the tube B is slightly displaced in the vertical direction or bent, the direction of the tube B is forcibly corrected and inserted vertically to automate the assembly of the tube B. I can do it.

Further, as clearly shown in FIG. 1B and FIG. 2, a parallel portion J is provided inside the inner peripheral surface G at the longitudinal end of the insertion hole F in the thickness direction, and The insertion guide portion 2 that spreads outwardly in the thickness direction of the plane G to the outside of the parallel portion J is continuously press-formed with the parallel portion J, and further outside of the insertion guide portion 2 and outside thereof. The expanding guide protrusion 2a is formed so as to protrude outward from the outer peripheral surface 6 of the peripheral portion G.

When the tube B is inserted into the insertion hole F, the guide protrusion 2a and the insertion guide portion 2 are bent in the width direction of the tube B, or are displaced laterally. Even if it is done, it is for guiding the end of the tube B in the width direction to facilitate insertion, and the parallel portion J is guided by the insertion guide portion 2 and is inserted in a bent state. The direction of B is straightened with respect to the pipe.

The guide protrusion 2a and the insertion guide portion 2 are, for example, as shown in FIG. 2, by a punching punch 7 provided with a protrusion 6 having the same shape as the guide protrusion 2a and the insertion guide portion 2 by a punching punch 7 shown in FIG. By pressing the pipe 1 from the direction of the arrow to punch through the insertion hole F, the insertion hole F is formed by one press work, and at the same time, the meat of the inner peripheral surface G at the longitudinal end of the insertion hole F is outside. Is formed by being pressed.

When the guide protrusion 2 a is formed in the insertion hole F, when the tube B is inserted into the insertion hole F, it is formed between the tube B and the pipe 1. Since the recessed portion 4 is larger than the case where only the insertion guide portion 2 is provided, the loading area is wider than that where only the insertion guide portion 2 is provided, and the loading strength is improved. Although the illustrated guide protrusion 2a and the insertion guide portion 2 are formed on the inner peripheral surface G at both ends in the longitudinal direction of the insertion hole F, if they are formed only on the inner peripheral surface portion G at any one end. Good.

The guide protrusion 2 a and the insertion guide portion 2 are configured 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. It is formed so as to be pressed and deformed into a taper that spreads outward, and the guide protrusion 2a is formed so as to protrude outward from the outer peripheral surface 5 of the pipe 1.

As the tube B, the one previously filed by the present inventor may be used (Japanese Patent Application No. 1-74663). This tube has an insertion restriction portion for restricting the insertion length into the pipe on its peripheral wall, so that the insertion length of the tube into the pipe can be surely 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.

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

[0020]

[Embodiment 2] Although the guide protrusion 2a and the insertion guide portion 2 of FIG. 1 (b) are formed into a taper which is linear and expands outward, the guide protrusion 2a and the insertion guide portion 2 are curved as shown in FIG. It can also be made into a shape (R) and spread outward.

[0021]

[Effect of device]

 The heat exchanger pipe of the present invention has the following effects. ． Since the insertion guide portion 2 and the guide protrusion 2a that spread outward are formed outside the inner peripheral surface G at the longitudinal end of the insertion hole F in the thickness direction, the tube B is inserted into the insertion hole F. When the tube B is slightly bent or displaced in the width direction when the tube B is inserted, the tube B is guided by the guide protrusion 2a and the insertion guide portion 2 which spread outward. It becomes easy to insert the tube B. ． 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 is then bent by the parallel portion J. Corrected and inserted vertically (straight) into the tube B, the assembly accuracy is improved and brazing is also secured. ． Since the guide protrusion 2a and the insertion guide portion 2 that 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 recessed portion (low pool) 4 is formed between the recessed portion 2 and the groove 2, so that the area to be bonded is widened, and the row 8 provided on the surface of the pipe 1 flows into the recessed portion 4 and easily accumulates therein. Further, it becomes easy to put a rod, which is separate from the pipe 1, in the recess 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 is less likely to leak 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 also good. Further, since the insertion guide portion 2 is pressure-molded and not formed by cutting, the row 8 (FIG. 7) provided at the peripheral portion of the insertion hole F is removed when the insertion guide portion 2 is molded. Instead, brazing becomes reliable. ． Since the guide protrusion 2a and the insertion guide portion 2 are formed to spread outward by pressing, the deformation of the guide protrusion 2a and the insertion / insertion guide portion 2 due to the pressure at the time of forming Since it is only the meat of the peripheral surface G and the pipe itself is not dented or bent, it is easy to process and the processing cost is low.

[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)

[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).