JPH01181046A - Pressure reducing device for freezing cycle of air conditioner - Google Patents

Abstract

PURPOSE:To prevent peeling of a sound insulating and vibration insulating material and to prevent the occurrence of a breakage accident due to vibration, by a method wherein the outer periphery of a linearly formed capillary tube is covered with a sound isolating and vibration isolating material, and the outside thereof is covered with an outer peripheral pipe having size large enough to allow engagement with pipings on the high pressure side and the low pressure side. CONSTITUTION:An outer periphery pipe 9 is held by means of protrusion parts 14 and 15, and a sound isolating and vibration isolating material 7 and a capillary tube 4 are mechanically held. The capillary tube 4 connected to a tapered contraction pipe part 12 of a piping 3 on the high pressure side by soldering, and after the capillary tube is connected to a contraction part 11 of a piping 6 on the low pressure side by soldering, the sound isolating and vibration isolating material 7 is wound therearound to cover it with the outer periphery pipe 9. With this state, an expansion pipe 17 is formed so as to have approximately the same size as the outer sizes of the piping 3 on the high pressure side and the piping 6 on the low pressure side, and is formed to a part of the piping. The expansion pipe part 17 is situated so that the tip part of an inlet pipe 16 of a vaporizer 5 is engaged externally of the piping 6 on the low pressure side. The piping 6 on the low pressure side is connected to the expansion pipe part 17 to solder a connection therebetween, and devices are assembled. Or, separately from arrangement of a piping around a compressor, the piping is secured as an ordinary piping to a corner part in a machine.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a pressure reducing device for a refrigeration cycle of an air conditioner.

2. Description of the Related Art Conventionally, a pressure reducing device for this type of refrigeration cycle has been constructed as shown in FIG. That is, compressor 30° condenser 32
, a high pressure side pipe 33 connected to this condenser 32, a capillary tube 34, an evaporator 36, and a low pressure side pipe 36 connected to this evaporator 35 are connected to form a refrigeration cycle. The capillary tube 34 is a long thin tube wound several times into a circle. When the refrigerant passes through the inside of the capillary tube 34, vibrations and refrigerant flow noise are generated, so the bind 37a.

At 37b, attach the capillary tube 34 at the opposite side of the dowel.
In this conventional configuration, the capillary tube 34 is wrapped around the capillary tube 34. The space to keep
This is necessary in an air conditioner (not shown) that uses a lot of piping, and it is necessary to reduce pressure so that it does not cause damage due to vibration during winding in a circle or during transportation, breakage of capillary tubes, and peeling of sound and vibration insulating materials. To provide the device, a capillary tube is formed, the outer periphery of the capillary tube is covered with a sound-proofing and vibration-proofing material, the outer periphery of the sound-proofing and vibration-proofing material is covered with a slitted outer tube, and both ends of the outer circumferential tube are connected to the ends of the piping. It is fitted around the outer periphery.

Function: With this configuration, the capillary tube covered with the sound-proofing and vibration-proofing material and the sound-proofing and vibration-proofing material covered with the outer tube are connected to both ends of the piping on the high and low pressure sides. It will be handled in the same way as normal piping and will be placed within a small space.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. As shown in FIG. 2, the refrigeration cycle consists of compression l! i1, a condenser 2, a high-pressure side pipe 3 connected to the condenser 2, a capillary tube 4 (dotted line), an evaporator 6, and a low-pressure side pipe 6 connected to the evaporator 5 are connected to each other. The capillary tube 4 is formed linearly, and as shown in FIG. 1, a soundproof and vibration-proofing material 7 made of unvulcanized butyl tape is wrapped around the outer periphery of the capillary tube 4. An outer tube 9 having a slit 8 is provided on the outer circumference of the tube 7 . This outer circumferential tube 9 is, for example, a plate-shaped copper plate, and the copper plate is formed into a cylindrical shape along the soundproof and vibration-proofing material 7 so as to meet at the slit 8 . The inner diameter of the outer circumferential pipe 9 is the same as that of the high pressure side pipe 3 and the low pressure side pipe 6.
It is molded to be approximately the same or slightly larger than the outer diameter of the The end portions of the high-pressure side pipe 3 and the low-pressure side pipe 6 are fitted into each other. Since the outer diameter of the capillary tube 4 is generally smaller than the inner diameters of the high-pressure side pipe 3 and the low-pressure side pipe 6, a tapered constriction section 1o is provided at the tip of the high-pressure side pipe 3, and similarly the low-pressure side pipe A tapered pipe contraction part 11 is also provided at the tip of the pipe e.

It is connected to the capillary tube 4 through the tapered tube contraction portions 10 and 11, and the outer circumferential tube 9 has an inward convex portion along the inclined portion 12.13 of the tapered tube contraction portion. Projections 14° and 16 are provided.

In the above configuration, the outer circumferential tube 9 is held by the protrusions 14.15, and the sound and vibration damping material 7 and the capillary tube 4 are mechanically held. In actual assembly, the capillary tube 4 is connected to the tapered tube contraction section 12 of the high pressure side piping 3 with brazing, and then the capillary tube 4 is connected to the tapered tube contraction section 12 of the low pressure side piping 6.
1 with brazing, then wrap a sound-proofing and vibration-proofing material around it, and cover it with an outer circumferential tube 9. In this state, high pressure side piping 3 and low pressure side piping 6
The outer diameter of the pipe is approximately the same as the outer diameter of the pipe, and the
For example, at the tip of the inlet pipe 16 of the evaporator 6, there is a low pressure side pipe e.
An expanded tube portion 17 is provided so that the outer diameter of the tube fits into the expanded tube portion 17, and the low pressure side piping 6 is connected to this expanded tube portion 17 and brazed to assemble the equipment. Alternatively, apart from the piping surrounding the compressor (not shown), it is fixed to a corner of the machine as a regular piping.

Effects of the Invention As is clear from the description of the above-mentioned embodiment, the present invention covers the outer periphery of a linearly formed capillary tube with a sound-proofing and vibration-proofing material made of unvulcanized butyl tape material, etc. Since it is formed so as to be covered with an outer circumferential tube that fits the diameter of the pipe and the low-pressure side pipe, there is no accident of the sound and vibration damping material peeling off as in the past. Additionally, the outer circumferential tube increases its strength and eliminates breakage accidents caused by vibration. Furthermore, there is no need to wrap the capillary tube, and since the capillary tube is a straight tube, space is reduced. The outer tube can be bent using a pipe pedicel even after wrapping, and it has the same workability as conventional copper piping, so it is easy to handle, can be processed into any shape, and can be smoothly placed inside equipment, etc. It is effective.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the pressure reducing device of the refrigeration cycle of an air conditioner according to an embodiment of the present invention, Fig. 2 is a configuration diagram of the pressure reducing device of the refrigeration cycle of the air conditioner, and Fig. 3 is a conventional air conditioner. It is a block diagram which shows the pressure reduction device of the refrigeration cycle of a conditioner. 4... Capillary tube, 7...
Soundproofing and vibration-proofing material, 8...Slit, 9...
outer tube. Name of agent: Patent attorney Toshi Nakao and 1 other person
3 diagram

Claims (1)

[Claims] A straight capillary tube is formed, the outer periphery of this capillary tube is covered with a sound-proofing and vibration-proofing material, an outer circumferential tube with a slit is wrapped around the outer periphery of this sound-proofing and vibration-proofing material, and both ends of the outer circumferential tube are connected to piping. A pressure reducing device for an air conditioner's refrigeration cycle that fits into the end of the air conditioner.