JPH055598A - Heat exchanger - Google Patents

Abstract

PURPOSE:To obtain a heat exchanger in which a core and a header tank can be simultaneously connected. CONSTITUTION:In a heat exchanger, a header tank 9 is connected to both ends of heat exchanging core 1 formed of a plurality of tubes 3 and a plurality of fins 5. The tank 9 is divided into a plurality of tank elements 9a, 9a,..., 9a, ends of the tubes 3 are respectively inserted into tube insertion holes of the elements 9a, and the core 1 and the tanks 9 are simultaneously connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly to a heat exchanger in which a core and a header tank can be joined together.

[0002]

2. Description of the Related Art Generally, heat exchangers used for industrial oil coolers and aftercoolers are known. In this type, as shown in FIG. 17, a plurality of tubes 63 and a plurality of fins 65 forming a core 61 are joined between facing header plates 67 (only one side is shown), and the header plates 67 are also shown. A header tank 69 is joined to the outside of the.

[0003]

However, in the conventional structure, the tube 63 and the fin 65 are joined to each other to form the core 6.
When forming 1, the core 61 contracts in the direction of arrow D, so that the header plate 67 is deformed in the direction of arrow E. If this is deformed, it becomes difficult to join the header plate 67 and the header tank 69, and there is a problem that the header tank 69 and the core 61 cannot be easily joined together in a batch.

Therefore, an object of the present invention is to provide a heat exchanger which can solve the problems of the above-mentioned conventional techniques and can be joined together as a whole.

[0005]

In order to achieve the above object, the present invention provides a heat exchanger in which a header tank is joined to both ends of a heat exchange core composed of a plurality of tubes and a plurality of fins. In the exchanger, the header tank was composed of a plurality of tank elements communicating with each other, and the end of each tube was inserted into the tube insertion hole of each tank element, and the core and header tank were joined together. It is a feature.

[0006]

According to the present invention, the ends of the tubes constituting the core are inserted into the tube insertion holes of the tank elements, respectively, and the tank elements are connected in the vertical direction and then joined together. According to this, even if the core shrinks in the longitudinal direction of the header tank at the time of joining, for example, the brazing filler metal or the like melts, and each tank element itself shrinks in the longitudinal direction by that amount. The header tank is not distorted and it is not deformed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 indicates an aluminum core. The core 1 is formed by joining a tube 3 made of aluminum and a fin 5 made of aluminum, and the header tank 9 made of aluminum is provided at both ends of the core 1.
(Only one side is shown) are joined. Reference numeral 10 is an entrance / exit socket.

The header tank 9 comprises a plurality of tank elements 9a, 9a ... 9a, and each tank element 9a
2, a sheet 11 made of aluminum is bent along bending lines a ₁ , a ₂ , a ₃ , a ₄ , a ₅ to form a box shape. In FIG. 2, 13 is a tube insertion hole, and 15 and 17 are communicating holes. One communicating hole 1
The peripheral edge 17a of 7 is burred.

As shown in FIG. 3, the tank elements 9a are vertically arranged in succession.
The peripheral edge portion 17a of the communication hole 17 of is closely fitted into the communication hole 15 of the adjacent tank element 9a, and the end portion 3a of the tube 3 is inserted into the tube insertion hole 13 of each tank element 9a. There is.

However, according to this embodiment, the brazing sheet in which the brazing material is clad with the aluminum sheet 11 is used to braze the core 1 and the header tank 9 together. You can

When brazing and joining at once, the core 1 shrinks in the direction of arrow A, as shown in FIG. However, when joining, the longitudinal direction of the header tank (direction of arrow A)
Even if the core shrinks, the brazing material of the brazing sheet 11 melts, and the tank elements 9a themselves shrink in the same direction by that amount, so there is no distortion in the header tank as compared with the conventional one. , It won't deform.

It is possible to set the height H of each tank element 9a lower than the set height in consideration of the shrinkage allowance of the core 1. According to this, the arrow A
Even if the core 1 contracts in the direction of, the contraction margin is absorbed by the difference between the set height and the height H of each tank element 9a, so that the header tank 9 may be deformed as in the conventional case. Instead, the heat exchanger can be manufactured at low cost because they can be joined together easily.

4 to 7 show another embodiment.

According to this, the inlet / outlet socket 23 is embedded in the tank element 21a of the header tank 21. Site of the tank element 21b embedding the doorway socket 23, 21c is a view as shown in 5, fold lines b ₁ made of aluminum sheet 25, b _2, b _3,
It is bent along b ₄ , b ₅ , and b ₆ to form a box shape. In FIG. 5, 26 is a tube insertion hole, and 27 and 28.
Is a communication hole, and the peripheral edge portion 28a of one communication hole 28 is burred.

Each tank element 21a, 21b, 21
As shown in FIG. 6, c is continuously provided in the vertical direction. At this time, in the recess 29 formed at the corner of the two tank elements 21b, 21c, as shown in FIG. The socket 23 is fitted. The point that they are joined together is the same as in the above embodiment.

According to this, as shown in FIG. 4, even if a rotational torque acts on the socket 23 in the direction of the arrow B, this rotational torque is generated by the two tank elements 2.
Since it is received by the side walls of 1b and 21c, the strength of the socket 23 is improved as compared with the conventional one. Further, although the conventional socket is provided with a positioning projection, this type of projection eliminates the need for such a projection, and thus the cost can be reduced. Furthermore, according to this type, since the inlet / outlet socket 23 is embedded in the header tank 21, the heat exchanger can be made compact, and so on.

8 and 9 show another embodiment.

In this example, as shown in FIG. 8, the two tank elements 31a, which constitute the header tank 31,
Openings 33a and 33b having a width W and a height H are formed on the side wall of 31b, and an inlet / outlet socket 35 as shown in FIG. 9 is fitted into the openings 33a and 33b. The entrance / exit socket 35 is formed with a convex portion 37 that is fitted into the openings 33a and 33b, and the convex portion 37 has a width and a height of W and 2 × H, respectively. An inlet hole 38 is formed in the socket 35, and the inlet hole 38 communicates with the elongated hole 39 formed on the convex portion 37 side inside the socket 35. Therefore, according to this type, it is possible to obtain an effect that it is suitable for the large-diameter inlet / outlet socket 35.

FIG. 10 shows another embodiment.

Generally, fins called inner fins are provided inside the flat tube 3 as shown in FIG. Conventionally, the offset fin is inserted into the tube 3 and press-worked to integrally join the offset fin and the tube 3. However, since the offset fin itself has rigidity in this case, the fin and the tube 3 It is easy to cause a joint failure between 3 and.

According to this embodiment, however, as shown in FIG. 10, a sheet 41 made of aluminum is punched by a press, and a plurality of protrusions 4 are formed on the sheet surface at one time.
43, 43, 43 are formed, and the tips 43 of each are formed.
43a are bent to form inner fins 45, as shown in FIG. According to this, as shown in FIG. 12, when the inner fin 45 is inserted into the tube 47, pressed, and further brazed and joined, the fillet at the tip 43a is large, so that no joint failure occurs. The tube 47 and the inner fin 45 can be reliably joined together.

FIG. 13 shows another embodiment. According to this, the plurality of projecting pieces 53, 53, ... According to this, the protrusions 53, 53 ... 53 of the inner fin 55 are
Since it does not resist the flow of the working fluid, the fluid resistance can be reduced. As shown in FIGS. 14 to 16, it is possible to arrange the protruding pieces 53 in multiple rows or change the arrangement of the protruding pieces 53.

[0024]

As is apparent from the above description, according to the present invention, the header tank is composed of a plurality of tank elements communicating with each other, and the end portions of the tubes are respectively inserted into the tube insertion holes of each tank element. Insert and
Since the core and the header tank can be collectively joined, even if the core shrinks in the longitudinal direction of the header tank at the time of joining, for example, the brazing material is melted and each tank element itself shrinks in the longitudinal direction. Therefore, compared to the conventional one, the header tank is not distorted, and the deformation thereof can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a heat exchanger according to the present invention.

FIG. 2 is a development view of the header tank.

FIG. 3 is a sectional view of the header tank.

FIG. 4 is a perspective view showing another embodiment.

FIG. 5 is a development view of the header tank.

FIG. 6 is a perspective view of the header tank.

FIG. 7 is a sectional view of the header tank.

FIG. 8 is a perspective view showing another embodiment.

FIG. 9 is a perspective view of the header tank.

FIG. 10 is a perspective view of an inner tube showing another embodiment.

FIG. 11 is a perspective view of the inner tube.

FIG. 12 is a cross-sectional view of the same inner tube.

FIG. 13 is a perspective view of an inner tube showing another embodiment.

FIG. 14 is a plan view of an inner tube showing another embodiment.

FIG. 15 is a plan view of an inner tube showing another embodiment.

FIG. 16 is a plan view of an inner tube showing another embodiment.

FIG. 17 is a perspective view showing a conventional heat exchanger.

[Explanation of symbols]

1 core 3 tube 5 fin 9, 21, 31 header tank 9a, 21a, 21b, 21c, 31a, 31b tank element

Claims (1)

Claim: What is claimed is: 1. A heat exchanger in which a header tank is joined to both ends of a core for heat exchange composed of a plurality of tubes and a plurality of fins. It consists of multiple tank elements that
A heat exchanger characterized in that the ends of the tubes are inserted into the tube insertion holes of the tank elements, respectively, and the core and the header tank are joined together.