JP2508089Y2 - Fixing structure of refrigerant pipe and side plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a structure for fixing a refrigerant pipe and a side plate in a heat exchanger used in a refrigerator, a room air conditioner or the like.

<Prior Art> A heat exchanger used in a refrigerating device is a fin-tube type heat exchanger, and its typical structure is to mount a large number of fins on a refrigerant pipe in parallel at regular intervals and to connect the refrigerant pipe to a U-tube. It has a structure in which it bends in a letter shape and is continuous in a meandering shape, and the bend part bent in a U shape is inserted and fixed in a side plate. This side plate integrates the meandering refrigerant pipes with other devices and It fulfills the function of providing a mounting part.

Therefore, in the process of manufacturing the heat exchanger, it is required to firmly and easily insert and fix the U-shaped bend portion into the side plate.

Therefore, in view of such a demand, for example, Japanese Patent Laid-Open No. 58-22
Japanese Patent No. 894, Japanese Patent Laid-Open No. 63-180091, Japanese Utility Model Laid-Open No. 62-10727.
Inventions and ideas such as Japanese Patent No. 8 have been proposed.

<Problems to be solved by the invention> However, in the case of the above-mentioned two inventions, basically, a long hole through which the bend portion can be inserted is opened in the side plate, and the rear side plate through which the bend portion is inserted is viewed from the side. Since it is a means for crimping, it requires not only an apparatus in that it requires a crimping step, but also it is troublesome, and it requires skill in positioning, and there is a problem that fixing is incomplete.

In the latter device, a pair of holding pieces for holding the refrigerant pipe are provided in the long hole portion, and after holding the refrigerant pipe, the holding piece is bent through a tool to hold the refrigerant pipe. However, there are problems similar to the above, and further, there is a drawback that rattling occurs.

<Means for Solving the Problem> The present invention has been devised to solve the above-mentioned problems, drawbacks, and inconveniences that have not been solved in the related art. And install them in parallel,
The refrigerant pipe is bent in a meandering manner to form a bend portion, and a fixing structure of the refrigerant pipe and the side plate for fixing the bend portion to the side plate, wherein the side plate has both ends of an elongated hole portion into which the bend portion is inserted. Open a substantially U-shaped insertion hole with a series of short holes at right angles to
This is a structure for fixing a refrigerant pipe and a side plate in which the width of the opening at the tip of the short hole facing the long hole is made slightly smaller than the outer diameter of the refrigerant pipe.

<Operation> Since the present invention has the above-described configuration, the bend portion of the refrigerant pipe is first inserted into the long hole portion of the insertion hole of the side plate, and the two refrigerant pipe portions of the bend portion are press-fitted into the short hole portions, respectively. Only then, the refrigerant tube can be fixed to the side plate.

In this case, since the opening width of the tip portion of the short hole portion facing the long hole portion is made slightly smaller than the outer diameter of the refrigerant pipe, the tip portion of the short hole portion is fixed when the two refrigerant pipe portions are fixedly mounted. Although it will be forced to elastically deform to some extent, after mounting, the tip portion of the short hole portion strongly holds the two refrigerant pipe portions by the so-called springback effect.

<Embodiment> The present invention will be described below with reference to the drawings of an embodiment.

In the main part of the heat exchanger, a large number of fins 2 are attached in parallel to a long refrigerant pipe 1 through which a refrigerant such as CFC gas flows at regular intervals, and the refrigerant pipe 1 is bent in a U-shape to be continuous in a meandering shape. ,
The bent portion 3 is a portion bent into a U shape.

The side plate 4 to which the bend portion 3 is fixed serves to integrate the meandering refrigerant pipe 1 and to provide a portion to be attached to another device. A U-shaped insertion hole 5 is opened.

The insertion hole 5 has a structure in which the short hole portions 7 are connected at right angles to both ends of the long hole portion 6 having an opening area substantially equal to the projected area of the bend portion 3 along the axial direction, and face the long hole portion 6. The opening width of the tip portion of the short hole portion 7 is made slightly smaller than the outer diameter of the refrigerant pipe 1.

Therefore, first, as shown in FIG. 3, the bend portion 3 is inserted into the elongated hole portion 6 of the insertion hole 5, and further, as shown in FIG.
The refrigerant pipe 1 portion of the bend portion 3 is relatively laterally displaced and press-fitted into the short hole portion 7. At this time, since the opening width of the tip portion of the short hole portion 7 is slightly smaller than the outer diameter of the refrigerant pipe 1, the tip portion of the short hole portion 7 is pushed and expanded.
After the refrigerant pipe 1 portion has passed, it elastically returns, and the tip portion of the short hole portion 7 strongly holds the two refrigerant pipe portions by the springback effect.

In the illustrated embodiment, the opening width of the tip portion of the short hole portion 7 is
The connecting portion with the long hole portion 6 is particularly small in size, and has a strong resistance when laterally press-fitted.

Further, in the embodiment shown in FIG. 5, the ribs 8 are erected around the tip portion of the short hole portion 7 to surround them. This rib 8 is
This is because when the bend portion 3 is inserted and fixed, more contact portion is provided to the portion of the refrigerant pipe 1 so that pinching can be surely achieved, and further, it also functions to reinforce the short hole portion 7.

The present invention has been described above with reference to the embodiments of the drawings, but the present invention is not limited to the above-mentioned embodiments, and may be carried out in any manner as long as the configuration described in the scope of claims for utility model is not changed. it can.

<Effect of Device> In short, according to the present invention, the bend portion of the refrigerant pipe is
Since it can be inserted and fixed very easily without having to worry about positioning with respect to the side plate, only a slight press-fitting force needs to be applied after insertion and there is no need to use other caulking jigs or tools. Labor-saving can be achieved, and the spring-back effect ensures reliable fixing and holding of the refrigerant pipe portion after insertion, and the structure is simple and the molding is easy.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing a state in which a side plate is inserted and fixed in a refrigerant pipe, FIG. 2 is a front view of the side plate, and FIG. 4 is an enlarged front view showing a state in which the short hole portion is inserted into the insertion hole, FIG. 4 is an enlarged front view showing a state in which the short hole portion is further press-fitted, and FIG. DESCRIPTION OF SYMBOLS 1 is a refrigerant pipe, 2 is a fin, 3 is a bend part, 4 is a side plate, 5
Is an insertion hole, 6 is a long hole portion, and 7 is a short hole portion.

Claims (1)

(57) [Scope of utility model registration request] 1. A refrigerant pipe and a side plate in which a large number of fins are mounted in parallel on a long refrigerant pipe at regular intervals, the refrigerant pipe is bent in a meandering manner to form a bend portion, and the bend portion is fixed to a side plate. In the fixing structure with, in the side plate, a substantially U-shaped insertion hole in which short hole portions are continuously provided at right angles to both ends of the long hole portion into which the bend portion is inserted is opened, and the long hole portion is formed. A structure for fixing a refrigerant pipe and a side plate, in which the width of the opening of the front end of the short hole portion facing is made slightly smaller than the outer diameter of the refrigerant pipe.