JP2002147988A - Fixing device of spiral finned tube heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive fixing tool having a highly strong structure that easily fixes a spiral finned tube and at the same time prevents coming-off and vibration from occurring. SOLUTION: The fixing device is installed perpendicular to a refrigerant pipe 22 to solve the problem, a nib 25 of an upper fixing tool 24 is engaged to a cutout 26 of a lower fixing tool 23 so that a spiral fin 21 can be pinched, and at the same time the heat exchanger is fixed by a screw 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for fixing a heat exchanger attached to a spiral fin tube heat exchanger used for a refrigerator, a showcase or the like.

[0002]

2. Description of the Related Art In recent years, heat exchangers used in refrigerators and showcases have been designed to reduce the size of products themselves and to prevent performance deterioration due to clogging of heat exchangers due to dust and the like. Spiral fin tube heat exchangers that are excellent in space saving and dust resistance have been widely used.

[0003] The spiral fin tube heat exchanger is composed of a plurality of curved pipes having spiral fins, fixed by a fixing device, and attached to a refrigerator, a showcase, or the like.

A conventional fixing device for a spiral fin tube heat exchanger will be described below with reference to FIGS.

FIG. 6 is a front view of a spiral fin tube heat exchanger using a conventional fixing device.
1 is a spiral fin tube heat exchanger, 2 is a spiral fin, 3 is a refrigerant tube, 4 is a fixing device, 9
Denotes a screw for fixing the fixing device. FIG. 7 is a cross-sectional view of a conventional fixing device. 2 is a spiral fin, 3 is a refrigerant tube, 5 is a lower fixing tool having a shape contacting the outer periphery of the spiral fin, and 6 is a shape contacting the outer periphery of the spiral fin. An upper fixture 7 is a nail for temporarily fixing the lower fixture 5 and the upper fixture 6, a notch 8 for inserting the nail, 9
Is a screw for fixing the lower fixture and the upper fixture.

[0006] With regard to the fixing of the above-mentioned structure,
The mounting operation will be described below. First, the spiral fin 2 is sandwiched between the lower fixing device 5 and the upper fixing device 6, and the claw 7 of the upper fixing device is inserted into the notch 8 of the lower fixing device. The lower fixture and the upper fixture are fixed with the screws 9 temporarily. By fixing the spiral fin tube heat exchanger in this manner, the shape is stabilized, and attachment to a refrigerator, a showcase, or the like is facilitated.

[0007]

However, there are the following problems in the above configuration and mounting operation. In the above-described configuration, first, since the fixing tool has a shape in contact with the outer periphery of the spiral fin, there is no strength in the fixing tool longitudinal direction, and the screw holes of the upper fixing tool and the lower fixing tool are also accompanied by the elasticity of the fixing tool itself. Positioning is difficult,
A method of temporarily fixing the upper fixing device and the lower fixing device in advance and then fixing them with screws has been adopted. This allows
In the fixing work, there is a problem that a fixing jig or the like is required to be changed because of the caulking and screwing, and the number of screws increases due to the shape of the fixing tool. Further, since the strength in the longitudinal direction of the fixture is not so much improved even after the fixing, there is a problem that the heat exchanger itself is deformed by an external force.

In addition, both the upper fixing tool and the lower fixing tool have a shape that comes into contact with the outer periphery of the spiral fin, and also have a crimping portion and a notch portion, so that the shape is complicated and a lot of material is used. However, there is a problem that it is expensive.

[0009] In order to solve the above-mentioned problems, the present invention comprises a fixture having strength in the longitudinal direction, which can be easily attached to a heat exchanger, has low material cost, and can be manufactured at low cost. It is intended to provide.

[0010]

According to the first aspect of the present invention,
Consisting of a lower fixture and an upper fixture installed so as to be perpendicular to the refrigerant tube having spiral fins, the configuration in which the spiral fin is sandwiched by the cut-and-raised surface of the fixture, in the direction perpendicular to the refrigerant tube Can be maintained, and even when the lower fixture and the upper fixture are fixed, it is not necessary to perform temporary fixing, and the fixture can be easily attached. In addition, it is possible to reduce material costs by using the cut and raised surface.

According to a second aspect of the present invention, in the fixing device of the first aspect, the end of the fixing device in a direction perpendicular to the refrigerant pipe is bent, so that the strength of the fixing device in the direction perpendicular to the refrigerant pipe is provided. Can be further improved in strength.

[0012] According to a third aspect of the present invention, the bending of the end face of the fixture according to the second aspect in the vertical direction with respect to the refrigerant pipe is further folded back to be double (hemming bending) to thereby make the refrigerant pipe of the fixture. The fixture can be reduced in size while maintaining the strength in the vertical direction.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a fixing device for a spiral fin tube heat exchanger according to the present invention will be described.
This will be described with reference to the drawings. Note that the same reference numerals are given to the same components in the related art, and detailed description is omitted.

(Embodiment 1) FIG. 1 is a sectional view of a fixing device for a spiral fin tube heat exchanger according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of the lower fixture of the embodiment, and FIG. 3 is a perspective view of the upper fixture.

1, 2 and 3, 21 is a spiral fin, 22 is a refrigerant tube, 23 is a lower fixture, 24 is an upper fixture, 25 is a claw, 26 is a notch, 27 is a screw, and 28 is a screw. It's a cut-up.

The mounting operation of the fixing device constructed as described above will be described. First, a spiral fin tube heat exchanger is installed on the lower fixing member so that the refrigerant tube is oriented perpendicular to the longitudinal direction of the fixing device. , So that the fin is sandwiched by the upper fixture. At this time, after fitting the claw of the upper fixing device into the notch of the lower fixing device, the other fixing device is used. This method eliminates the need for the conventional temporary fixing by caulking, and as a result, does not require the holding of a jig or the like during fixing. In addition, the number of screws can be reduced by screwing only one of both ends of the fixture, reducing the number of screwing man-hours.
The material cost of the screw can be reduced.

(Embodiment 2) FIG. 4 is a cross-sectional view of an upper fixture according to Embodiment 2 of the present invention in a direction parallel to a refrigerant pipe. In FIG. 4, reference numeral 30 denotes a bend. By configuring this bending, the strength of the fixture in the direction perpendicular to the refrigerant tube can be improved, and a high-strength heat exchanger can be obtained.

(Embodiment 3) FIG. 5 is a sectional view of an upper fixture according to Embodiment 3 of the present invention in a direction parallel to a refrigerant pipe. In FIG. 5, reference numeral 31 denotes folding (hemming bending). In the folding, the strength of the fixture in the vertical direction with respect to the refrigerant pipe can be improved, and a space for the bending dimension can be secured compared to the bending without bending, making it possible to reduce the thickness of the strong spiral heat exchanger. it can.

[0019]

As described above, in the fixing device according to the first aspect, the strength of the fixing tool in the vertical direction with respect to the refrigerant pipe is maintained by holding the spiral fin sandwiched between the cut and raised surfaces of the fixing tool. The mounting of the fixture can be further simplified, and the number of steps for mounting can be reduced.

Further, the fixing device according to the second aspect can have higher strength by providing a bending in addition to the fixing device according to the first aspect.

In the fixing device according to the third aspect, the bending of the small fixing device according to the second aspect is folded back so that the size of the fixing device can be reduced while maintaining the strength.
The heat exchanger can be made thinner.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fixing device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a lower fixture according to the embodiment.

FIG. 3 is a perspective view of an upper fixture according to the embodiment.

FIG. 4 is a sectional view of an upper fixture according to a second embodiment of the present invention.

FIG. 5 is a sectional view of an upper fixture according to a third embodiment of the present invention.

FIG. 6 is a front view using a conventional fixing device.

FIG. 7 is a sectional view of a conventional fixing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Spiral fin 3 Refrigerant tube 4 Fixing device 5 Lower fixture 6 Upper fixture 7 Claw 8 Notch 9 Screw 21 Spiral fin 22 Refrigerant tube 23 Lower fixture 24 Upper fixture 25 Claw 26 Notch 27 Screw 28 Cut and raise 30 Bend 31 Fold

Claims (3)

[Claims] An upper fixing tool and a lower fixing tool are provided so as to be perpendicular to a refrigerant pipe having a spiral fin, and the spiral fin is sandwiched and held by a cut-and-raised surface of the fixing tool. Fixing device for spiral fin tube heat exchanger. 2. The fixing of the spiral fin tube heat exchanger according to claim 1, wherein the strength of the fixture is improved by bending an end face of the fixture perpendicular to the refrigerant tube having the spiral fin. apparatus. 3. The fixing device for a spiral fin tube heat exchanger according to claim 2, wherein the end face of the fixing tool perpendicular to the refrigerant tube having the spiral fin is folded back (hemming bending).