JPH0636420Y2 - Thin tube breakage prevention structure for air conditioners and protective tube for thin tubes - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is an air conditioner for preventing damage to thin pipes such as pressure switch conduits and temperature sensitive pipes attached to vibration pipes such as suction pipes and discharge pipes. The present invention relates to a structure and a protective tube for a thin tube used in this damage prevention structure.

<Prior art> When attaching a thin pipe to the vibration pipe in an air conditioner,
Various methods have been taken to prevent breakage of thin tubes caused by vibration.

For example, the conventional air conditioner shown in FIG.
No. 23898), a slack portion 3a is formed in a thin pipe 3 welded to a discharge pipe 2 connected to a compressor 1,
The thin tube 3 is fixed to the discharge tube 2 and the compressor 1 by a metal fitting 5 at a location 3b ahead of the slack portion 3a. By doing so, the thin tube 3 and the discharge tube 2 are vibrated together with the compressor 1 by the metal fitting 5, so that stress concentration on the welded portion 3c and repetitive stress value are relieved to prevent damage to the welded portion 3c. .

However, in the fixing method using the metal fitting as described above, there is a drawback that when the metal fitting 5 is loosened even slightly, the thin pipe 3 and the discharge pipe 2 rub against each other and a hole is formed in the thin pipe 3 and gas leaks from there.

Therefore, even if a slack is formed on the thin tube and then fixed to the vibration pipe, a method of covering the thin tube with a protective tube made of vinyl chloride and then clasping the thin tube to the vibration pipe and fixing it Has been adopted. In this method, the welding of the thin tube to the vibration pipe is performed after the thin tube is covered with the protective tube.

<Problems to be Solved by the Invention> According to the method using the protective tube, it is possible to prevent the thin tube and the vibrating tube from rubbing against each other, but there are the following drawbacks.

(I) First, since the inner diameter of the protective tube is slightly larger than the outer diameter of the thin tube, it is difficult to fit the protective tube into the thin tube. Moreover, since the friction is large, it is difficult to move the protective tube to a predetermined position.

(Ii) As described above, the thin tube is covered with the protective tube in advance before welding the thin tube to the vibrating pipe. That is, the fixing position of the thin tube is not fixed at the stage of covering the protective tube. If the protective tube can be easily moved, the protective tube may be moved to the fixing position of the thin tube after welding the thin tube, but this is not the case. Therefore, since it is necessary to cover the protective tube over a wider area than necessary, the protective tube must be used more than necessary, resulting in a large amount of waste and high cost.

(Iii) Further, when welding the thin tube to the vibrating pipe, the welding is performed while the protective tube is being cooled because the protective tube is covered. If the cooling process is attempted to be avoided, there are restrictions such as determining the length of the protective tube in consideration of heat transfer during welding.

In this way, the conventional method of using a protective tube is
There are various drawbacks in terms of workability and economy.

Therefore, an object of the present invention is to provide a protective tube for a thin tube which is excellent in workability and economy, and to provide a structure for preventing damage to a thin tube of an air conditioner using the protective tube for a thin tube.

<Means for Solving the Problem> The above object is achieved by forming a slit penetrating in the longitudinal direction in a protective tube for a thin tube made of a flexible material and covering the thin tube.

<Operation> Due to the presence of the slit, the protection tube can be easily attached to and removed from the thin tube. Further, it becomes possible to attach the protective tube after connecting the thin tube to the vibration tube.

<Embodiment> The present invention will be described in detail below with reference to an illustrated embodiment.

FIG. 1 shows a protective tube for a thin tube which is an embodiment of the present invention. The protection tube 10 is a vinyl chloride tube having an inner diameter of 5 mm, and a slit 11 penetrates in the longitudinal direction.

FIG. 2 shows an example of a structure for preventing damage to a thin tube of an air conditioner using the protection tube 10. In FIG. 2, 12 is a part of a discharge pipe as a vibration pipe connected to a compressor (not shown), and this discharge pipe 12 has a faucet-shaped connection pipe 13 for connecting a thin pipe. The other end of a thin tube 14 having one end connected to a pressure switch (not shown) is inserted into the connecting pipe 13 and brazed to the tip of the connecting pipe 13.

The thin tube 14 is a slack portion that hangs below the connecting tube 13.
It has 14a and a covering portion 14b covered with the protective tube 10, and is fixed to the central portion of the connecting pipe 13 by a pressing belt 15 in the covering portion 14b.

To attach the protective tube 10 to the thin tube 14, after brazing the thin tube 14 to the tip of the connecting tube 13, after determining the fixing position of the thin tube 14 with respect to the connecting tube 13, open the slit 11 to the fixing position. It was done mainly. Therefore,
It is sufficient that the length of the protective tube 10 is a minimum required length centered on the fixing part by the compression belt 15, and unlike the conventional case, the amount of the protective tube used is not wasted and the cost can be reduced. Further, even if the fixed position is changed, the protection tube 10 can be easily removed from the thin tube 14 and reattached due to the presence of the slit 11.

Further, since the protective tube 10 can be attached after brazing the thin tube 14 to the connecting tube 13 in this way, unlike the conventional method in which the thin tube is welded to the vibrating pipe after the protective tube is mounted, The welding work is not restricted by the protective tube.

Needless to say, the effect of preventing breakage of the thin tube and the effect of preventing perforation from the thin tube are the same as in the case of using the conventional protective tube.

Further, the material of the protective tube, the shape of the slack portion of the thin tube, the type of fixture, the type of thin tube and the vibrating body, etc. are not limited to those in the above embodiments.

<Effect of Device> As is clear from the above description, according to the present invention, since the protective tube made of a flexible material for covering the thin tube has a slit penetrating in the longitudinal direction, the protective tube can be attached to the thin tube. It can be removed very easily. In addition, after connecting the thin tube to the vibrating pipe, the protective tube can be installed after determining the fixing point of the thin tube, so the length of the protective tube can be kept to the minimum necessary and waste is avoided. Economical efficiency is improved. At the same time, since the welding work of the thin tube can be performed without any restrictions related to the protective tube, workability is improved.

[Brief description of drawings]

FIG. 1 is a view showing an example of a protective tube for a thin tube of the present invention,
FIG. 2 is a diagram showing an example of a thin tube damage preventing structure of an air conditioner using the protective tube of FIG. 1, and FIG. 3 is a diagram showing a conventional thin tube damage preventing structure. 10 …… Protective tube, 11 …… Slit, 12 …… Discharge tube,
13 …… Connection tube, 14 …… Thin tube, 15 …… Clamping belt.

Claims (2)

[Scope of utility model registration request] 1. A thin pipe (14) having one end attached to a vibrating pipe (12, 13) is provided with a slack portion (14a) on the one end side and is flexible from the slack portion (14a) to the other end side. The covering portion (14b) covered with a protective tube (10) made of a material is formed, and the covering portion (14b) is fixed to the vibrating pipes (12, 13) by a fixture (15). A structure for preventing damage to thin tubes of an air conditioner, wherein the protective tube (10) has a slit (11) penetrating in a longitudinal direction. 2. A protective tube for a thin tube of an air conditioner, which is made of a flexible material and has a slit (11) penetrating in the longitudinal direction.