JPH0592479U - Air conditioner compressor port cap - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a port cap having a function of removing water inside the compressor. [Structure] A port cap for closing an opening of a port portion projecting on the outer surface of an air conditioner compressor. The desiccant was provided in the cylindrical port cap body that is detachably fitted to the outside of the port portion. The desiccant is held by the port cap body and comes into contact with the atmosphere inside the compressor when the port cap body is attached to the port portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a compressor used in a car air conditioner or the like, and in particular, a detachable part provided to close the port part during long-term storage or transportation of the compressor (here, this part is referred to as "port cap"). Call).

[0002]

[Prior Art]

 Ingress of water into the refrigeration circuit and residual water cause corrosion of iron-based materials used in compressors and so must be avoided as much as possible.

In a conventional refrigeration circuit, R-12 is often used as a refrigerant. In this case, naphthine-based mineral oil or paraffin-based mineral oil is generally used as the compressor lubricating oil (refrigerating machine oil). Since these oils have low water absorption (about 20 PPM), it is less likely that the water content of the lubricating oil adversely affects the compressor. In other words, it is sufficient to equip the port with a port cap during long-term storage or transportation of the compressor.

Recently, since R-12 has been regulated as depleting the ozone layer, use of R-134a is being considered instead of it. When R-134a is used, it is necessary to use PAG (polyalkylene glycol) as the lubricating oil in order to obtain the required lubricity.

[0005]

[Problems to be solved by the device]

 However, since PAG has high water absorption (generally 20,000 PPM to 50,000 PPM), it is likely to cause corrosion problems in the compressor. For example, if the compressor is stored for a long period of time, moisture will intrude into the compressor from the outside due to deterioration of the sealing material and mix into the lubricating oil, which will hydrolyze the refrigerant when used as an air conditioner system. However, it may generate acid and cause corrosion problems on compressor parts. This problem due to moisture cannot be solved by providing the above-mentioned port cap on the port portion.

Therefore, an object of the present invention is to provide a port cap having a function of removing water inside the compressor.

[0007]

[Means for Solving the Problems]

 According to the present invention, in a port cap for closing an opening of a port portion projecting on an outer surface of an air conditioner compressor, a cylindrical port cap body detachably fitted to the outside of the port portion, and the port cap body. A port cap for an air conditioner compressor, comprising: a desiccant which is held by the port cap body and which contacts the atmosphere inside the compressor when the port cap body is attached to the port portion.

[0008]

【Example】

 FIG. 1 shows a port cap according to an embodiment of the present invention. The port cap includes a metallic bottomed cylindrical port cap body 1. The port cap body 1 has a female screw 2 near the opening. A rubber seal member 8 is fixedly arranged inside the port cap body 1. A part 9a of a dry material container 9 is embedded and fixed in the rubber seal member 8. The other part of the desiccant container 9 extends to the outside through the opening of the port cap body 1. At least a part of the desiccant container 9 is made of a wire net 9b, and the desiccant 6 such as synthetic zeolite is contained therein.

The port cap shown in FIG. 1 can be used as each of the port caps 13 and 14 for closing the openings of the port portions 11 and 12 of the air conditioner compressor shown in the disassembled state in FIG.

In this compressor, a cylinder head 19 is mounted on the cylinder-side end surface of the cylinder block 15 via a cylinder gasket 16, a valve plate assembly 17, and a head gasket 18, and is fixed by bolts 21. The lubricating oil is supplied to the compressor by removing the oil plug 22. After supplying the lubricating oil, the oil plug 22 is attached and tightened via the O-ring 23.

When the compressor is stored or transported for a long period of time, the port caps 13 and 14 are screwed into the male threads of the port portions 11 and 12 of the cylinder head 19 so as to be firmly attached. As a result, the openings of the port portions 11 and 12 are closed by the port caps 13 and 14.

When the port caps of FIG. 1 are used as the port caps 13 and 14, the desiccant container 9 is inserted into the ports 11 and 12, so that the mesh of the wire net 9 b of the desiccant container 9 is passed through. The desiccant 6 comes into contact with the atmosphere inside the port portions 11 and 12. Therefore, also in this case, the moisture inside the compressor is removed by the drying material 6.

As described above, even if moisture penetrates into the outside air due to the sag of the sealing material or the loosening of the cap, the moisture is removed by the drying material, so that the problem due to moisture can be reduced. ..

[0014]

[Effect of the device]

 As described above, according to the present invention, when the port cap body is fitted to the outside of the port portion, the desiccant comes into contact with the atmosphere inside the compressor, so that it has a function of removing moisture inside the compressor. Port caps can be provided. Therefore, it becomes possible to easily use R-134a as the refrigerant.

[Brief description of drawings]

FIG. 1 is a sectional view of a port cap according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a compressor for an air conditioner together with a port cap.

[Explanation of symbols]

 1 Port Cap Main Body 2 Female Thread 8 Sealing Member 9 Drying Material Container 11, 12 Port Section 13, 14 Port Cap

Claims (3)

[Scope of utility model registration request] 1. A port cap for closing an opening of a port portion projecting on an outer surface of an air conditioner compressor, wherein a cylindrical port cap body detachably fitted to the outside of the port portion and the port cap body. A port cap for an air conditioner compressor, comprising: a desiccant material which is held and which comes into contact with an atmosphere inside the compressor when the port cap body is attached to the port portion. 2. The port cap for an air conditioner compressor according to claim 1, wherein the desiccant extends into the port portion. 3. The port cap body is screwed onto the outside of the port portion, and a seal member is provided inside the port cap body to press the end face of the port portion when attached to the port portion. 3. The desiccant container extending into the port portion is attached to the sealing member, the desiccant container is made of a net at least partially, and the desiccant container is contained in the desiccant container. Port cap for air conditioner compressor.