JPS63255581A - Gas compressor - Google Patents

Abstract

PURPOSE:To improve the durability of a sealing member by using polyglycol group oil as the lubricating oil for a gas compressor which uses the refrigerant of R-22 group. CONSTITUTION:A gas compressor 1 is used as a part of a refrigerating cycle using the refrigerant R-22 and compresses the refrigerant gas through the revolu tion of a vane 13. The polyglycol group oil 3 as lubricating oil is stored on the bottom part of an oil separating chamber 17. The O-rings 20-25 as sealing member are made of rubber material. Since the rubber material does not gener ate swelling phenomenon even in contact with the refrigerant R-22 and polyglycol group oil under the high temperature and high pressure condition, the durability of the sealing member can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gas compressor used for a floor pump in a household air-conditioning system, a compressor for a car cooler, or the like.

(Summary of the Invention) The present invention provides sealing materials for various parts of a gas compressor used in a part of a refrigeration cycle using refrigerant R-22 or a refrigerant containing this, by using polyglycol-based lubricating oil. The purpose is to improve the durability of rubber materials used as hose materials to connect related equipment such as condensers, condensers, and evaporators.

(Prior Art and its Problems) In general, R-22, which has a high cooling capacity, is used as a refrigerant in heat pumps for domestic air-conditioning and heating systems to reduce the size of the heat pumps. This heat pump uses an electric motor as its driving device, and the motor and gas compressor are integrally enclosed in a single case to prevent refrigerant from leaking outside. . And, the lubricating oil for gas pressure W3 aircraft is usually Suniso 4GS.
Naphthenic oils such as

However, when using a gas engine instead of an electric motor as the drive device for a heat pump, the gas engine cannot be installed integrally with the gas compressor in one case like an electric motor, so the gas It is necessary to provide a compressor separately from the gas engine and provide sealing members at each part to prevent refrigerant from leaking to the outside from the gas compressor. However, the sealing member is usually made of rubber material, but this rubber material swells when it comes into contact with refrigerant R-22 and naphthenic oil under high temperature and high pressure, resulting in a significant deterioration of its durability. be.

On the other hand, the compressor of a car cooler, which can also be used as a heat pump for home heating and cooling equipment using a gas engine, usually uses R-12 as the refrigerant and naphthenic oil as the lubricant. A rubber material is used as the seal member. In other words, the seal member made of rubber material is exposed to refrigerant R under high temperature and high pressure.
-12 and naphthenic oils, no swelling phenomenon occurs.

However, as mentioned above, the rubber material swells when it comes into contact with refrigerant R-22 and naphthenic oil under high temperature and high pressure. The problem is that it cannot be repurposed as is.

(Means for Solving the Problems) Therefore, in order to solve the above problems, the present invention aims to solve the problems described above.
22 or a gas compressor that is used as a part of a refrigeration cycle using a refrigerant containing R-22 and has each seal member made of a rubber material, and is configured to use polyglycol oil as its lubricating oil. It is something.

(Function) According to the gas compressor having such a configuration, the rubber material forming the seal member does not swell even if it comes into contact with refrigerant R-22 and polyglycol oil under high temperature and high pressure. , the durability of the sealing member can be significantly improved.

In addition, the compressor of the car cooler is Kasuni 3
= Even when used in a heat pump for a home air-conditioning system driven by an engine, the rubber material forming the seal member will not swell even if it comes into contact with refrigerant R-22 and polyglycol oil under high temperature and high pressure. Since the durability of the sealing member is not impaired, it can be reused as is.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. The drawing shows an embodiment of a gas compressor according to the present invention.

The drawing shows a heat pump used in a home heating and cooling system. 1 is a gas compressor, and a scum engine 2 using propane gas, city scum, etc. is connected to this gas compressor 11 to drive the heat pump.

The gas compressor 1 is used as part of a refrigeration cycle (not shown) using refrigerant R-22, and has the following structure.

In the gas compressor 1, 5 is a housing, and a cylinder 7 whose inner peripheral surface has a substantially elliptical diameter is accommodated within the housing 5. A front side block 10 and a rear side block 11 are provided on both end faces of the cylinder 7, respectively. A rotor 8 is rotatably housed inside the cylinder 7r) via rotor shafts 8a and 8b, and a plurality of vanes 13 are provided on the rotor 8 so as to be movable in the radial direction. A gas engine 2 using propane gas, city gas, etc. is connected to the rotor shaft 8a, and the rotor 8 is driven by the scum engine 2, causing a plurality of vanes 13 to rotate inside the cylinder 7, thereby removing refrigerant scum. It is designed to be compressed.

A front head 14 is provided on the right side of the front side block 10 in the figure, and a suction chamber 15 is defined between the front head 14 and the front side block 10. An oil separation chamber 17 is defined in the housing 5 on the left side of the rear side block 11 in the drawing, and a polyglycol oil 3 as a lubricating oil is stored at the bottom of the oil separation chamber 17.

An O-ring 2 is provided between the housing 5 and the discharge port metal member 18.
0 (sealing member), an O-ring 21 between the rear side block 11 and the housing 5, an O-ring 22 between the rear side block 11 and the oil separator 19, and an O-ring 22 between the housing 5 and the front side bronch 10. There is an O-link 23 between the flange portion 14a of the front head 14, or an inlet port member 16 between the suction port portion 14b of the front head 14 and the
An O-link 24 is interposed between the rotor shaft 8a and the central cylindrical portion 14c of the front head 14, and an O-ring 25 is interposed between the rotor shaft 8a and the central cylindrical portion 14c of the front head 14.These O-rings 20 to 25 are made of rubber material, especially Made of chloroprene rubber.

Now, the durability of the chloroprene rubber that forms the O-ring, especially the O-rings 20 to 23, which are exposed to high temperature and high pressure on the discharge side, would deteriorate significantly in the past, whereas the structure of the above embodiment According to the gas compressor 1 of
Since the rings 20 to 23 do not swell even when they come into contact with the refrigerant R-22 and polyglycol oil under high temperature and high pressure conditions, their durability can be significantly improved. This has currently been confirmed to have a durability record of over 9000 hours at a maximum operating temperature of 120°C.

In addition, the naphthene-based lubricating oil used previously has a temperature of 5.6°C.
If the temperature is below 100%, the refrigerant and the refrigerant will separate into two phases, meaning that the refrigerant will completely dissolve into the oil.The fluidity of the oil when it returns will be extremely poor. The oil has very good fluidity because it does not separate into two phases up to around °C. In particular, this property makes ## suitable for use in cold regions.

Furthermore, during the peak power usage period in the summer, it is desirable to perform air conditioning using a gas engine heat pump using slightly surplus gas from the standpoint of correcting the balance between power demand and waste demand.

Even when a car cooler compressor is used in a heat pump for a household air-conditioning system driven by a gas engine, the chloroprene rubber that forms the sealing member swells even when it comes into contact with refrigerant R-22 and polyglycol oil under high temperature and high pressure. Since this phenomenon does not occur and the durability of the sealing member is not impaired, it is possible to reuse it as is. This is a major advantage, especially at the current stage where gas engine heat pumps are about to become widespread, in that there is no need to immediately construct new production facilities just for this purpose.

In the above embodiments, the heat pump is driven by a gas engine, but the heat pump is not limited to a gas engine, and may be driven by an engine that runs on liquid fuel such as Karin.

Further, in the above embodiment, a gas compressor of a heat pump used in a household air-conditioning device was described, but it may also be used as a compressor of a car cooler. especially,
Refrigerant R-12, which was commonly used in conventional car cooler compressors, has a significantly longer decomposition period in the ozone layer than refrigerant R-22, so there is a tendency to ban it in the future from the perspective of preventing air pollution. Therefore, it is urgent and important to be able to use refrigerant R-22 in car coolers.

Furthermore, in the above embodiment, a gas compressor used in a refrigeration cycle using refrigerant R-22 was explained, but the refrigerant does not have to be 100% R-22.
It may also be used in a refrigeration cycle using a refrigerant containing

(Effects of the Invention) As explained above, according to the present invention, the rubber material forming the seal member does not swell even when it comes into contact with refrigerant R-22 and polyglycol oil under high temperature and high pressure. Therefore, the durability of the seal member can be significantly improved.

Furthermore, even when a car cooler compressor is used in a heat pump for a household air-conditioning system driven by a gas engine, the rubber material forming the seal member comes into contact with refrigerant R-22 and polyglycol oil under high temperature and high pressure. Since no swelling phenomenon occurs and the durability of the sealing member is not impaired, it is possible to reuse it as is.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of a gas compressor according to the present invention. 1... Gas pressure wJ machine 2... Gas engine 3... Lubricating oil (polyglycol oil) 5... Housing 7... Cylinder 8... Rotor 8a, 8b... Rotor shaft 10...Front side block 11...Rear side block 13...Vane 14...Front head 14a...Flange portion 14b...Intake port portions 1, 4c...Central cylinder portion 15...・Suction chamber 16...Suction cap member 17...Oil separation chamber 18...One discharge port cap member...Oil separator

Claims (1)

[Claims] In a gas compressor that is used as part of a refrigeration cycle that uses refrigerant R-22 or a refrigerant containing this R-22, and has each seal member made of a rubber material, polyglycol-based oil is used as the lubricating oil. A gas compressor characterized by: