JPH11325496A - Finned tube heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate modification of fin shape. SOLUTION: The heat exchanger comprises a series of heating tubes folded back substantially in parallel, and a plurality of planar fins 7 stretching substantially perpendicularly thereto. The fin 7 is bent along two bottom lines 11, 12 extending from one edge 8 to the other edge 9 in the breadthwise direction thereof while opening in V-shape, and along a ridge line 10 between the two bottom lines 11, 12 to form a chevron bend 13 having height increasing from one edge 8 toward the other edge 9. Consequently, the tin 7 can be bend easily in the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fin tube heat exchanger, and more particularly, to a fin-shaped configuration.

[0002]

2. Description of the Related Art In a conventional fin tube type heat exchanger, taking an air conditioner as an example, as shown in FIG. 8, a suction port 2 and an air outlet 3 formed in an air conditioner body 1 are connected. The air passage was provided with a cylindrical blower fan 4 and a fin tube type heat exchanger 5 surrounding the blower fan 4 in an arc shape so that the blower distribution was uniform.

[0003]

However, in the above configuration, since the fin tube type heat exchanger is formed in an arc shape, a special mold for forming the fin shape in an arc is required, and the curvature of the arc is changed. In such a case, there is a problem that a new dedicated mold is required. In view of the above problems, an object of the present invention is to provide a fin tube type heat exchanger that can easily change a fin shape.

[0004]

In order to solve the above-mentioned problems, the present invention provides a fin tube type heat pipe comprising a plurality of plate-like fins installed at substantially right angles to a series of heat transfer tubes folded substantially in parallel. In the exchanger, two valley fold lines formed in a U shape formed from one side edge to the other side edge in the width direction of the fin, and a mountain fold line between the two valley fold lines are bent. The fin is bent in the longitudinal direction by providing a bent portion which is bent in a mountain shape so as to increase from one side edge to the other side edge.

Further, the mountain fold line is formed at right angles to the longitudinal direction of the fin, and the two valley fold lines are formed symmetrically with respect to the mountain fold line.

Further, the bent portion is provided with at least one notch groove extending in the longitudinal direction of the fin, and is alternately bent into a mountain shape before and after the notch groove.

The length of the cut groove is set to be the same as the length between the two valley fold lines.

[0008] In addition, a plurality of bent portions are provided.

Further, the plurality of bent portions have the same bending angle.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the embodiments of the present invention shown in FIGS. First, a first embodiment of the present invention shown in FIGS. 1 to 5 will be described. An air conditioner will be described as an example.
As shown in FIG. 2, a cylindrical blower fan 4
And a fin tube type heat exchanger 5 in which the air blowing fan 4 is bent into a polygon so as to make the air distribution uniform, and is surrounded by a pseudo-arc. As shown in FIG. 2, the fin tube type heat exchanger 5 is made of a copper tube or the like, and a series of heat transfer tubes 6 folded in parallel, and wrapped at right angles to the heat transfer tubes 6. And a plurality of fins 7 made of an aluminum plate or the like. As shown in FIG. 3, a plurality of U-shaped heat transfer tubes 6
a through the insertion holes of the fins 7,
A heat transfer tube 6a having a semicircular shape
Are connected to form a series of heat transfer tubes 6. 4, the fin 7 is formed at right angles to the longitudinal direction of the fin 7 from the front edge 8 which is one side edge to the rear edge 9 which is the other side edge. FIG. 5 is a view of folding a mountain fold line 10 and valley fold lines 11 and 12 that are formed symmetrically with respect to the mountain fold line 10 and that are formed from the front edge 8 to the rear edge 9 and open in a C shape. As shown in the perspective view of the main part of the fin, a bent portion 13 which is bent and raised in a mountain shape so as to be higher from the front edge 8 to the rear edge 9 is provided, so that The length of the rim 9 is shorter and the fin 7 is bent. By providing the bent portions 13 at a plurality of locations, the fin tube type heat exchanger 5 is formed in a pseudo arc shape.

The mountain fold line 10 formed at right angles to the longitudinal direction of the fin 7 and the two valley fold lines 11 and 12 formed symmetrically with respect to the mountain fold line 10 are bent and raised into a mountain shape. By forming the bent portion 13, the bent portion 13 can be formed at right angles to the longitudinal direction of the fins 7, so that the air to the fins 7 can flow evenly to the left and right of the bent portions 13. it can. By providing the bent portions 13 at a plurality of positions, the fin tube type heat exchanger 5 can be bent into a polygon and formed into a polygon having various shapes such as a pseudo-arc shape. By making the bending angles of the bent portions 13 provided at the plurality of locations the same, the bent portions 13 can be easily formed into a pseudo-circular shape, and the workability of bending can be improved. When the shape of the air conditioner body 1 changes or the like, it becomes necessary to change the pseudo-arc-shaped curvature or the like of the fin-tube heat exchanger 5, the valley fold lines 11 and 12 of the bent portion 13 The shape of the fin 7 can be easily changed by changing the angle at which the fold line 13 is bent into the mountain shape and changing the bending angle of the bent portion 13.

Next, a second embodiment of the present invention shown in FIGS. 6 and 7 will be described. The configuration of the bent portion is different from that of the first embodiment. As shown in the development view of the main part of the fin in FIG. 6, two longitudinal directions having the same length between the two valley fold lines 11 and 12 as the length between the two valley fold lines 11 and 12 are shown. As shown in the perspective view of the main part of the fin in FIG. 7, a bent portion 15 is formed by alternately bending and raising the fin into a mountain shape before and after the cut groove 14. By making the length of the cut groove 13 equal to the length between the two valley fold lines 11, 12, the two valley fold lines 11,
Since both ends of 12 can be used as a guide for bending,
Accurate bending can be performed. The cut groove 14
The bent portions 15 are alternately bent and raised before and after the above, so that the rigidity of the bent portion 15 is increased, and the shape stability of the fin tube type heat exchanger 5 can be increased.

[0013]

As described above, according to the present invention,
The fin tube type heat exchanger can easily change the fin shape.

[Brief description of the drawings]

FIG. 1 is a right side sectional view showing the overall configuration of an air conditioner using a fin tube heat exchanger according to the present invention.

FIG. 2 is a front view of a fin tube type heat exchanger according to the present invention.

FIG. 3 is a front view showing a method for manufacturing a fin tube type heat exchanger according to the present invention.

FIG. 4 is a development view of a main part of a fin of the first embodiment of the fin tube type heat exchanger according to the present invention.

FIG. 5 is a perspective view of a main part of the fin of the first embodiment of the fin tube type heat exchanger according to the present invention.

FIG. 6 is a developed view of a fin of a fin tube type heat exchanger according to a second embodiment of the present invention.

FIG. 7 is a perspective view of a main part of a fin of a fin tube type heat exchanger according to a second embodiment of the present invention.

FIG. 8 is a right side sectional view showing the overall configuration of an air conditioner using a conventional fin tube type heat exchanger.

[Explanation of symbols]

 Reference Signs List 5 fin tube type heat exchanger 6 heat transfer tube 7 fin 8 front edge (one side edge) 9 rear edge (other side edge) 10 mountain fold line 11 valley fold line 12 valley fold line 13 bend part 14 cut groove 15 bend part

Claims (6)

[Claims] 1. A fin tube type heat exchanger comprising a plurality of plate-like fins installed at substantially right angles to a series of heat transfer tubes folded substantially in parallel, wherein one of the fins extends from one side edge in the width direction. The two valley fold lines formed in the shape of the letter C formed over the side edge, and the mountain fold line between the two valley fold lines are bent so that the ridges become higher from one side edge to the other side edge. A fin tube type heat exchanger characterized in that the fin is bent in the longitudinal direction by providing a bent portion which is bent to a shape. 2. The fold line according to claim 1, wherein the fold line is formed at right angles to the longitudinal direction of the fin, and the two valley fold lines are formed symmetrically with respect to the fold line. Fin tube type heat exchanger. 3. The bent portion is provided with at least one notch groove extending in a longitudinal direction of the fin, and is bent and raised alternately before and after the notch groove. The fin tube type heat exchanger according to claim 1. 4. The apparatus according to claim 3, wherein a length of the cut groove is equal to a length between the two valley fold lines.
A fin tube type heat exchanger as described. 5. The fin tube type heat exchanger according to claim 1, wherein the bent portion is provided at a plurality of positions. 6. The finned tube heat exchanger according to claim 5, wherein the plurality of bent portions have the same bending angle.