JPH0611288A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve the operational efficiency at the time of temporary joining of net-like fins to heat transfer pipes. CONSTITUTION:In a heat exchanger consisting of a number of heat transfer pipes 1 arranged parallel to one another and a number of net-like fins 2 joined to the outer peripheries of the heat transfer pipes parallel to the axes thereof, a plurality of joining ribs 4 are formed at the place of joining a plurality of net-like fins 2 to each of heat transfer pipes 1 in such a manner that the joining ribs 4 are curved in the same directions in an overlapping condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mesh fin type which comprises a plurality of heat transfer tubes arranged in parallel and a plurality of mesh fins joined to the outer circumference of the heat transfer tubes in parallel with the tube axis. It relates to a heat exchanger.

[0002]

2. Description of the Related Art A cross fin coil type heat exchanger, which is constructed by arranging a large number of plate-shaped fins orthogonally to a large number of heat transfer tubes arranged in parallel, has been widely used in the past. In order to improve the heat transfer performance of the heat exchanger, various types of fin processing (for example, forming cut-and-raised pieces of various shapes on the fin surface) are performed. There is a limit to improvement.

Therefore, in recent years, the development of a mesh fin type heat exchanger, which is a heat exchanger having a new structure, has been under development (for example, Japanese Utility Model Laid-Open No. 61-192185).
(See Japanese Patent Publication).

This mesh fin type heat exchanger is
As shown in FIGS. 6 and 7, a large number of heat transfer tubes 1, 1, ... Arranged in parallel and a large number of meshes joined to the outer circumference of the heat transfer tubes 1, 1 ,. Fins 2,2
. And the heat transfer tube 1 and the mesh fins 2, 2 ... are formed by connecting the mesh fins 2, 2 from both sides of the heat transfer tube 1.
・ It is customary to sandwich and sandwich the parts, and then join them by soldering or brazing.

[0005]

However, as described above, the mesh fins 2, 2, ... Are formed on both sides of the heat transfer tube 1, 1 ,.
When sandwiching the mesh fins 2, 2, ... At the time of temporarily assembling the mesh fins 2, 2, ..., there is a problem that the assembly man-hours are complicated because the mesh fins 2, 2 ,.
The solution is awaited.

The present invention has been made in view of the above points, and an object thereof is to improve workability in temporarily assembling the mesh fins to the heat transfer tube.

[0007]

In the invention of claim 1, as a means for solving the above-mentioned problems, as shown in the drawings, a large number of heat transfer tubes 1, 1, ... In a heat exchanger consisting of a large number of mesh fins 2,2, ... Joined to the outer circumference of 1,1, ... In parallel with the tube axis, the heat exchanger tubes 1 and mesh fins 2 are joined together. In the portion, the joining ribs 4, 4 ... Which are curved in the same direction and are in a superposed state are formed.

According to a second aspect of the present invention, as a means for solving the above-mentioned problems, as shown in the drawings, in the heat exchanger according to the first aspect, the bending direction of the joining ribs 4, 4 ,. , At the joints with the adjacent heat transfer tubes 1 and 1, the directions are opposite to each other.

According to a third aspect of the invention, as a means for solving the above-mentioned problems, as shown in the drawings, in the heat exchanger according to the first or second aspect, each mesh fin 2 has a corrugated plate shape. It is bent to.

[0010]

According to the first aspect of the invention, the following actions can be obtained by the above means.

That is, after the mesh fins 2, 2, ... Are superposed so that the joining ribs 4, 4 ,. If the heat pipes 1, 1 ... Are fitted respectively, the temporary assembly of the heat transfer pipes 1, 1 .. and the mesh fins 2, 2 ..

According to the second aspect of the invention, the following actions can be obtained by the above means.

That is, since the bending directions of the joining ribs 4, 4, ... Are opposite to each other at the joining portion with the adjacent heat transfer tubes 1, 1, the heat transfer tubes 1, 1 ,. It is possible to effectively prevent misalignment between 2, 2, ... In the temporarily assembled state.

According to the third aspect of the invention, the following actions can be obtained by the above means.

That is, the front surface area (that is, the area facing the air flow) of the mesh fins 2, 2, ... Between the heat transfer tubes 1, 1 ,.

[0016]

According to the first aspect of the present invention, a large number of heat transfer tubes 1, 1, ... Arranged in parallel and the outer circumferences of the heat transfer tubes 1, 1 ,. In a heat exchanger composed of a large number of mesh fins 2, 2, ..., At the joints between the heat transfer tubes 1 and the mesh fins 2, the joint ribs 4 are curved in the same direction and are in a superposed state. , 4 ... are formed, the mesh fins 2, 2 ,.
After superposing so that they overlap, the heat transfer tubes 1,1 ..
・ Each of them can be fitted to the heat transfer tubes 1,1 ・ ・ and the mesh fins 2,2 ・ ・ easily and temporarily, and the assembly workability is greatly improved. It has the excellent effect of being able to.

According to the invention of claim 2, in the heat exchanger according to claim 1, in the heat exchanger according to claim 1,
The bending direction of the joining ribs 4, 4, ...
Since the joints with and are oriented in opposite directions to each other, it is possible to effectively prevent the heat transfer tubes 1, 1, ... And the mesh fins 2, 2, ..
There is an excellent effect that the assembling workability is further improved.

According to the invention of claim 3, in the heat exchanger according to claim 1 or 2, the mesh fins 2 are bent into a corrugated plate shape, and the mesh fins between the heat transfer tubes 1, 1 ,. Since the front surface area of 2, 2, ... (that is, the area facing the air flow) is reduced, there is an excellent effect that it contributes greatly to downsizing of the heat exchanger.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Like the mesh fin type heat exchanger described in the section of the prior art, the heat exchangers according to the following embodiments have a large number of heat transfer tubes 1, 1, ...
, And a large number of mesh fins 2, 2, ... Joined to the outer circumference of the heat transfer tubes 1, 1 ... In parallel with their tube axes (see FIGS. 6 and 7). Reference numeral 3 is a tube plate that supports the tube ends of the heat transfer tubes 1, 1.

Embodiment 1 FIG. 1 shows a main part of a heat exchanger according to Embodiment 1 of the present invention. The present embodiment corresponds to the invention of claim 1.

In the heat exchanger of this embodiment, joint ribs 4, 4 ... Curved in the same direction and in a superposed state are integrally formed at joints between the heat transfer tubes 1 and the mesh fins 2. Is formed in. At least the innermost one of the joining ribs 4, 4, ... (Preferably about half of the total number of ribs) is formed to have a curvature degree deeper than the radius of the heat transfer tube 1. Has been done. In the case of this embodiment, the bending directions of the joining ribs 4, 4, ... (In other words, the opening direction) are all the same direction.

In the case of the heat exchanger constructed as described above, the mesh fins 2, 2, ... Are superposed so that the joining ribs 4, 4 ,. Four
When the heat transfer tubes 1, 1 ... Are fitted from the side of the heat transfer tubes, the temporary assembly of the heat transfer tubes 1, 1 ... and the mesh fins 2, 2 ... Is completed. In this case, the mesh fins 2,2
Since the temporary assembling position is unlikely to shift, the assembling workability is greatly improved. After that,
By assembling with solder or brazing at each joint, the assembly of the heat exchanger is completed.

Embodiment 2 FIG. 2 shows the essential parts of a heat exchanger according to Embodiment 2 of the present invention. The present embodiment corresponds to the inventions of claims 1 and 2.

In the case of the present embodiment, the joining ribs 4, 4, ... Are curved so that the bending directions thereof are opposite to each other at the joint with the adjacent heat transfer tubes 1, 1. By configuring in this way, the heat transfer tubes 1,1 ...
-It is possible to effectively prevent the deviation from the temporary assembly state, and the assembly workability is further improved. Other configurations and operational effects are similar to those of the first embodiment.

Embodiment 3 FIG. 3 shows the essential parts of a heat exchanger according to Embodiment 3 of the present invention. The present embodiment corresponds to the inventions of claims 1 to 3.

In the case of this embodiment, each mesh fin 2 is bent into a corrugated plate shape. By configuring in this way, the mesh fins 2, 2, ... Between the heat transfer tubes 1, 1 ,.
The front surface area of () (that is, the area facing the air flow F) is reduced, which greatly contributes to the compactification of the heat exchanger. Other configurations and effects are the same as those of the first or second embodiment.
Is the same as.

Embodiment 4 FIG. 4 shows the essential parts of a heat exchanger according to Embodiment 4 of the present invention. The present embodiment corresponds to the inventions of claims 1 to 3.

In the case of this embodiment, in the heat exchanger of the third embodiment, the entire heat exchanger is bent into a corrugated plate shape parallel to the heat transfer tubes 1, 1. With this configuration, the heat exchanger can be made more compact. Other configurations and operational effects are similar to those of the first or second embodiment.

Embodiment 5 FIG. 5 shows the essential parts of a heat exchanger according to Embodiment 5 of the present invention. The present embodiment corresponds to the inventions of claims 1 to 3.

In the case of this embodiment, in the heat exchanger of the third embodiment, the entire heat exchanger is bent in a corrugated plate shape orthogonal to the heat transfer tubes 1, 1. With this configuration, the heat exchanger can be made more compact. Other configurations and operational effects are similar to those of the first or second embodiment.

In each of the above embodiments, the heat transfer tube 1 is a circular tube, but a flat tube or an elliptic tube may be used.

The invention of the present application is not limited to the configuration of each of the above-described embodiments, and it goes without saying that the design can be appropriately changed without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of a heat exchanger according to a second embodiment of the present invention.

FIG. 3 is a schematic side view showing a main part of a heat exchanger according to a third embodiment of the present invention.

FIG. 4 is a schematic side view showing a main part of a heat exchanger according to a fourth embodiment of the present invention.

FIG. 5 is a schematic side view showing a main part of a heat exchanger according to a fifth embodiment of the present invention.

FIG. 6 is a front view of a conventional mesh fin type heat exchanger.

FIG. 7 is a cross-sectional view of a main part of a conventional mesh fin type heat exchanger.

[Explanation of symbols]

 Reference numeral 1 is a heat transfer tube, 2 is a mesh fin, and 4 is a joining rib.

Claims (3)

[Claims] 1. A plurality of heat transfer tubes (1), (1) arranged in parallel.
.. and a large number of mesh fins (2), (2) joined to the outer periphery of the heat transfer tubes (1), (1) ..
The heat exchanger consisting of and, in the joint portion between the heat transfer tubes (1) and the mesh fins (2), joint ribs (4) curved in the same direction and in a superposed state, (4) ・ ・ The heat exchanger characterized by forming. 2. The joining ribs (4), (4), ... are curved in opposite directions to each other at a joining portion between adjacent heat transfer tubes (1), (1). The heat exchanger according to claim 1. 3. The heat exchanger according to claim 1, wherein the mesh fins (2) are bent in a corrugated plate shape.