JPH072780U - Tube for heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] The length of the tube inserted into the pipe can be made constant, and once it is inserted into the pipe, it will be displaced until it is fixed to the pipe, or the insertion length will change. Difficult,
The heat exchanger tube has a stable flow of the refrigerant in the tube. [Structure] Tube 1 is tube insertion hole F of pipe A
Is formed in a laterally elongated flat tube having an outer shape that can be inserted into the tube 1, and a protrusion 3 is formed on an outer surface of the tube 1 in the laterally long direction so that the outer end surface of the protrusion 3 is inserted into the pipe A. The abutting end face 12a that abuts on the peripheral wall of the pipe and regulates the insertion length L into the pipe.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchanger tube used for an air conditioner of an automobile or the like.

[0002]

[Prior art]

 In the heat exchanger used in the air conditioner, as shown in FIG. 3, the refrigerant flows from one pipe A into the tube B having the horizontally long flat tubular shape, flows into the other pipe C, and then from the pipe C to the tube. It flows in a meandering manner through pipe B to pipe A, during which pressure is applied to the refrigerant to forcibly dissipate the heat and the refrigerant becomes a low-temperature high-pressure cooling liquid. The heat released at this time is transferred to the tube B, transferred to the corrugated fin D provided between the tubes B, and dissipated by the air blown to the corrugated fin D. There is.

The two pipes A and C of this heat exchanger have the same structure, and both are partitioned in the longitudinal direction by a partition plate E as shown in FIGS. 3 and 4. The refrigerant sent from the pipe A on the left side of FIG. 4 is supplied to the tube B in the upper stage, and the refrigerant sent from the tube B to the pipe C on the right side is sent to the tube B below. The refrigerant sent from the tubes B to the pipe A is sent to the tube B at the lower stage so as to flow while meandering in the many tubes B. Usually, the number of tubes T is significantly smaller in the lower stage where the refrigerant becomes liquid, so that the liquid refrigerant can easily flow into the lower tube B.

When inserting the conventional tube B into the tube insertion hole F of the pipe A, for example, a semi-cylindrical positioning block G as shown in FIG. The tip of the tube B which is inserted into the tube insertion hole F of the pipe A is abutted against the block G for positioning, and then the block G is pulled out from the pipe A and then the pipe A and the tube B are closed. It was attached and fixed.

[0005]

[Problems to be solved by the device]

 However, the above-described tube B positioning method is uneconomical because the positioning block G must be prepared, and it is also troublesome to handle because it has to be inserted into or withdrawn from the pipe A. Further, when the block G is pulled out from the pipe A, the tube B abutting on the block G moves and the insertion length of the tube B easily shifts. Further, when the positioning block G is removed, there is nothing to regulate the insertion length of the tube, so that the position of the tube B is likely to be displaced before being attached.

When the tube B is displaced as described above and the insertion length L of the tube B into the pipe A shown in FIG. 6 changes, the flow resistance of the refrigerant in the pipe A changes, and It was said that the flow of the refrigerant into the tube B was non-uniform and the flow rate of the refrigerant flowing inside the tube B varied, and the cooling efficiency of the entire heat exchanger became unstable, resulting in insufficient cooling. There was a problem. In particular, the refrigerant is a gas in the upper stage (feeding side), but is liquefied as it flows in the lower stage. Therefore, the lower the stage, that is, the liquid state, the more easily it is affected by the variation in the insertion length L of the tube B.

The object of the present invention is to make it possible to make the insertion length of these tubes constant simply by inserting a large number of tubes into the pipe. The purpose of the present invention is to provide a tube for a heat exchanger in which the insertion length hardly changes until it is fixed to the tube and the flow of the refrigerant in the tube is stable.

[0008]

[Means for Solving the Problems]

 In the heat exchanger tube of the present invention, a tube 1 is inserted into each of two or more tube insertion holes F formed in two pipes A facing each other, and the tube 1 is inserted between the adjacent tubes 1. In the tube of the heat exchanger in which the corrugated fins D are fixedly arranged, the tube 1 is a horizontally long flat tube having an outer shape capable of being inserted into the tube insertion hole F of the pipe A as shown in FIG. Is formed on the outer surface of the tube 1 in the laterally long direction so that the protrusion 3 projects outward, and when the outer end surface of the protrusion 3 is inserted into the pipe A, the protrusion 3 abuts on the peripheral wall of the pipe to the pipe. The abutting end face 12a that regulates the insertion length L of is.

[0009]

[Action]

 In the tube for a heat exchanger of the present invention, the protrusion 3 is provided on the outer surface of the tube 1 formed in a horizontally long flat tube having an outer shape that can be inserted into the tube insertion hole F of the pipe A. Since the outer end face of the protrusion 3 is formed as a butting end face 12a that abuts the peripheral wall of the pipe at the time of being inserted into the pipe A and regulates the insertion length L into the pipe, the abutting end face 12a. By simply inserting the tube 1 into the tube insertion hole F of the pipe A until the tube 12a hits the peripheral wall of the pipe A, the tube 1 is automatically positioned and each tube A of the pipe A is positioned. -The insertion length L (FIG. 2) of two or more tubes 1 inserted into the tube insertion holes F is constant.

[0010]

【Example】

 FIG. 1 shows an embodiment of a heat exchanger tube according to the present invention. Reference numeral 1 in FIGS. 1 (a) and 1 (b) is a tube, which is made of metal, and is formed into a horizontally long flat tube having an outer shape that can be inserted into the tube insertion hole F. .

Square-shaped protrusions 3 projecting outward are formed on both laterally outer sides of the tube 1 of the oblong flat tubular shape, and the outer end surface of the protrusion 3 is inserted into the pipe A when the pipe 3 is inserted. It serves as an abutting end surface 12a that abuts the peripheral wall and regulates the insertion length L into the pipe. This protrusion 3 is molded separately from the tube 1 and fixed to both outer sides of the tube 1 in the laterally long direction by means of, for example, attaching it, as shown in FIG. 1 (b) when molding the tube 1. Protruding ridges 5 are formed on both sides in the lateral direction over the entire length of the tube 1, and both longitudinal end portions 5a, 5b and an intermediate portion 5c of the protruding ridge 5 are cut off so that only the protrusion 3 is formed. Or the protrusion 3 is formed integrally with the tube 1 when the tube 1 is formed. Although the illustrated protrusions 3 are formed on both outer sides of the tube 1 in the horizontal direction, they may be formed on only one side in the horizontal direction.

The length R from the abutting end face 12 a of the protrusion 3 to the longitudinal end face of the tube 1 is obtained by inserting the insertion portion 1 b of the tube 1 into the tube insertion hole F of the pipe A. When the abutting end face 12a of the protrusion 3 is abutted against the peripheral wall of the pipe A, the length L of the tube 1 into the pipe A is selected to be a predetermined insertion length L.

The tube 1 of the present invention is fixed to the pipe A after being inserted into the tube insertion hole F of the pipe A as shown in FIG. In this case, it is convenient to apply a roll material to each of the pipe A and the tube 1 at the portion to which it is attached in advance, and to heat the pipe A so that the material is melted and attached. Is.

[0014]

[Effect of device]

 The heat exchanger tube of the present invention has the following effects. ． The tube 1 is automatically positioned only by inserting the tube 1 into the tube insertion hole F of the pipe A until the butting end surface 12a hits the peripheral wall of the pipe A. ． If the length R from the abutting end face 12a of the protrusion 3 of the two or more tubes 1 inserted into the respective tube insertion holes F of the pipe A to the longitudinal end face of the tube 1 is made constant. Since the insertion length L of the two or more tubes 1 inserted into the tube insertion holes F is constant, the flow resistance of the refrigerant in the pipe A is stable, and the refrigerant into each tube B is stable. The amount of flowing in is also stable, and a heat exchanger with stable cooling efficiency can be obtained. ． The position of the abutting end face 12a can be easily changed by changing the forming position of the protrusion 3, and the insertion length into the pipe A can be changed. ． After inserting the tube 1 into the pipe A, it is easy to hold the abutting end surface 12a of the tube 1 abutting against the peripheral wall of the pipe A, and therefore, after inserting the tube 1, such as attaching to a tube. Even if post-work is performed, the tube 1 is less likely to be displaced, and the insertion length L of the tube 1 into the pipe A is constant, which is less likely to vary. ． Instead of cutting the peripheral wall of the tube 1 to form the abutting portion, the protrusion 3 is formed on the laterally outer surface of the tube 1 and the outer end surface thereof is abutted on the peripheral wall of the pipe A. Since the abutting end face 12a is formed, the wall thickness of the peripheral wall 2 of the tube 1 does not become thin even if the abutting end face 12a is formed, and the strength of the tube 1 does not deteriorate. Further, the abutting end face 12a can be easily formed. ． Since the protrusion 3 is provided on the outer surface of the tube 1 having a horizontally long flat tubular shape in the horizontally long direction, when the fine is arranged between the adjacent tubes inserted into the tube insertion holes of the pipe A, the protrusion 3 Does not get in the way. ． Since the tube 1 is formed into a laterally elongated flat tubular shape having an outer shape that can be inserted into the tube insertion hole F, the tube 1 can be directly inserted into the tube insertion hole without any processing such as cutting or cutting. Can be plugged into F.

[Brief description of drawings]

FIG. 1 (a) is an explanatory perspective view showing an embodiment of a heat exchanger tube of the present invention, and FIG. 1 (b) is a side view of the tube during molding.

FIG. 2 is an explanatory view of a usage state of the tube for heat exchanger of the present invention.

FIG. 3 is an explanatory view of a refrigerant condenser using a conventional tube for heat exchanger.

FIG. 4 is an explanatory view showing the flow of the refrigerant in the refrigerant condenser.

FIG. 5 is an explanatory sectional view showing an assembled state of the refrigerant condenser.

FIG. 6 is an explanatory cross-sectional view when variations occur in the insertion length of the tube.

[Explanation of symbols]

 1 is a tube 3 is a protrusion 12a is an abutting end face A is a pipe D is a corrugated fin F is a tube insertion hole L is an insertion length

Claims (1)

[Scope of utility model registration request] 1. A tube (1) is inserted into each of two or more tube insertion holes (F) formed in two pipes (A) facing each other, and an adjacent tube (1) is provided. In the tube of the heat exchanger in which the corrugated fins (D) are arranged between the tubes, the tube (1) is the tube of the pipe (A).
The tube (1) is formed into a horizontally long flat tube having an outer shape that can be inserted into the hole (F), and a protrusion (3) is provided on the outer surface of the tube (1) in the horizontally long direction, and the outer end surface of the protrusion (3). Is a butting end face (12a) that abuts the peripheral wall of the pipe (A) when the pipe is inserted into the pipe (A) and regulates the insertion length (L) into the pipe (A). -Boo.