JP2007187073A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conventional compressor with a centrifugal separation type oil separator which requires less labor for mounting a separator pipe in an oil separation chamber than conventional one. <P>SOLUTION: The compressor comprises a compression mechanism, a housing storing the compression mechanism, a discharge passage formed in the housing for discharging high pressure gas from the compression mechanism to the outside of the housing, and the centrifugal separation type oil separator 18 arranged on the midway of the discharge passage. The oil separator is inserted into the oil separation chamber 16 as part of the discharge passage at an annular gap from the peripheral side wall of the oil separation chamber. It has the separator pipe whose one end is provided with a slit extending to the longitudinal direction and elastically fitted to one end of the oil separation chamber. At one end of the oil separation chamber, a protrusion 20 is formed which is directed inward to the radial direction for engaging with one end of the separator pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a compression mechanism, a housing that accommodates the compression mechanism, a discharge passage that is formed in the housing and discharges high-pressure gas discharged from the compression mechanism to the outside of the housing, and a centrifugal separation system disposed in the middle of the discharge passage. The present invention relates to a compressor including an oil separator.

A compression mechanism; a housing that houses the compression mechanism; a discharge passage that is formed in the housing and discharges high-pressure gas discharged from the compression mechanism to the outside of the housing; and a centrifugal oil separator disposed in the middle of the discharge passage The oil separator has a separator pipe that is inserted into an oil separation chamber forming a part of the discharge passage with an annular gap from the circumferential wall of the oil separation chamber, and one end of which is press-fitted and fixed to one end of the oil separation chamber. A compressor characterized by this is disclosed in Patent Document 1 and the like.
In a conventional compressor having a centrifugal oil separator disclosed in Patent Document 1 or the like, one end of the oil separation chamber is used to prevent the separator pipe from coming out of the oil separation chamber from one end of the oil separation chamber. Measures are taken such as inserting the discharge pipe to the vicinity and attaching a retaining ring to one end of the oil separation chamber.
JP 2001-295767 A

In a conventional compressor provided with a centrifugal oil separator disclosed in Patent Document 1 or the like, an oil separation chamber takes time to press-fit one end of a separator pipe into one end of an oil separation chamber during assembly. There is a problem that it takes time to insert the discharge pipe up to the vicinity of one end of the oil or to attach the retaining ring to one end of the oil separation chamber.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a compressor including a centrifugal oil separator in which the labor required for attaching a separator pipe to an oil separation chamber is reduced as compared with the conventional one. To do.

In order to solve the above problems, in the present invention, a compression mechanism, a housing that houses the compression mechanism, a discharge passage that is formed in the housing and discharges high-pressure gas discharged from the compression mechanism to the outside of the housing, The oil separator is inserted in the oil separation chamber forming a part of the discharge passage with an annular gap from the circumferential wall of the oil separation chamber and extending in the longitudinal direction. One end part where an existing slit is formed has a separator pipe that is elastically fitted to one end part of the oil separation chamber, and a protrusion that is directed radially inwardly engageable with one end of the separator pipe at one end of the oil separation chamber The compressor is characterized by being formed.
In the oil separator included in the compressor according to the present invention, one end where the slit is formed is formed at one end of the oil separation chamber while the one end where the slit extending in the longitudinal direction is compressed inward in the radial direction. After inserting the separator pipe into the oil separation chamber to the position where it enters the oil separation chamber beyond the radial protrusion, the radial pressing force applied to the one end of the separator pipe is released, and one end of the separator pipe is released. Is restored to its original shape and elastically fitted to one end of the oil separation chamber and fixed.
Since one end of the oil separation chamber is formed with a radially inwardly projecting protrusion that can be engaged with one end of the separator pipe, the separator pipe cannot escape from one end of the oil separation chamber to the outside of the oil separation chamber.
There is no need to press-fit the separator pipe into one end of the oil separation chamber, and there is no need to insert a discharge pipe up to the vicinity of one end of the oil separation chamber or to attach a retaining ring to one end of the oil separation chamber. The labor required for mounting in the separation chamber is reduced as compared with the conventional case.

In a preferred embodiment of the present invention, the protrusion extends over the entire circumference of the oil separation chamber peripheral side wall.
By extending the protrusion over the entire circumference of the peripheral wall of the oil separation chamber, it is possible to reliably prevent the occurrence of a situation where the separator pipe comes out.

In the oil separator provided in the compressor according to the present invention, it is not necessary to press-fit the separator pipe into one end portion of the oil separation chamber, and a discharge pipe is inserted to one end portion of the oil separation chamber or at one end portion of the oil separation chamber. Since it is not necessary to attach a retaining ring, the labor required for attaching the separator pipe to the oil separation chamber is reduced as compared with the prior art.

A compressor according to an embodiment of the present invention will be described.
As shown in FIG. 1, the scroll compressor A includes a fixed scroll 1 having an end plate 1a and a spiral body 1b, and a movable scroll 2 having an end plate 2a and a spiral body 2b. The spiral bodies 1b and 2b mesh with each other to form a plurality of pairs of working spaces 3.
The scroll compressor includes a casing 4a and a front housing 4b. The casing 4 a and the front housing 4 b are joined together to form a housing 4 that houses the fixed scroll 1 and the movable scroll 2.
The end plate 1a of the fixed scroll is fitted and fixed to the casing 4a. An O-ring that seals the fitting fixing portion is provided. A suction chamber 5 and a discharge chamber 6 are formed in the housing 4 with the end plate 1a as a boundary.
A discharge hole 1c is formed at the center of the end plate 1a of the fixed scroll. The discharge hole 1c communicates with the discharge chamber 6 through a discharge valve attached to the end plate 1a.
A suction port (not shown) formed in the front housing 4 b communicates with the suction chamber 5. The suction port is connected to the low-pressure circuit of the air conditioner.
A discharge port (not shown) formed in the casing 4 a communicates with the discharge chamber 6. The discharge port is connected to the high voltage side circuit of the air conditioner.

A main shaft 7 is disposed in the suction chamber 5. The main shaft 7 is rotatably supported by the front housing 4b via radial bearings 8 and 9. One end of the main shaft 7 protrudes outside the front housing 4b.
An electromagnetic clutch 10 is rotatably supported by the front housing 4b via a radial bearing 11.
An eccentric pin 12 is fixed to the other end of the main shaft 7. A bush 13 is slidably fitted to the eccentric pin 12. The bush 13 is accommodated in a boss 2 c formed on the back surface of the end plate 2 a of the movable scroll 2 via a radial bearing 14.
A ball coupling 15 is disposed between the movable scroll 2 and the front housing 4b.
The main shaft 7, the eccentric pin 12, the bush 13, the movable scroll 2, and the fixed scroll 1 form a compression mechanism. The compression mechanism is accommodated in the housing 4.

A cylindrical oil separation chamber 16 is formed adjacent to the discharge chamber 6 in the casing 4a. The oil separation chamber 16 communicates with the discharge chamber 6 through an opening 17 formed in the partition wall between the oil separation chamber 6 and the discharge port. The discharge chamber 6 and the oil separation chamber 16 form a discharge passage for discharging the high-pressure gas discharged from the compression mechanism to the outside of the housing 4.
A separator pipe 18 is disposed in the oil separation chamber 16 and coaxially with the oil separation chamber 16. As shown in FIG. 2, one end of the separator pipe 18 has an enlarged diameter, and a slit 18a extending in the longitudinal direction is formed in the enlarged diameter portion. The separator pipe 18 is inserted into the oil separation chamber 16 from the peripheral side wall of the oil separation chamber 16 with an annular gap 16a therebetween, and has one end formed with a slit 18a that is enlarged in diameter and extends in the longitudinal direction. The oil separation chamber 16 is fixed to the peripheral wall of the oil separation chamber 16 by being elastically fitted to the one end portion 16b having an enlarged diameter. An oil separator 19 is formed by the annular gap 16 a and the separator pipe 18.
At one end of the oil separation chamber 16 whose diameter has been increased, a protrusion 20 is formed which can be engaged with the diameter-expanded end of the separator pipe 18 and directed radially inward. The protrusion 20 extends over the entire circumference of the peripheral side wall of the oil separation chamber 16.

The separator pipe 18 is attached to the separation chamber 16 in the following manner.
One end where the slit 18a is formed extends over the radial projection 20 formed at one end of the oil separation chamber 16 while the one end where the slit 18a is formed to extend in the longitudinal direction is compressed radially inward. After the separator pipe 18 is inserted into the oil separation chamber 16 through the hole 21 extending from the outer peripheral side surface of the casing 4a to the oil separation chamber 16 until it enters the oil separation chamber 16, the slit 18a of the separator pipe 18 The radial pressing force applied to the formed one end is released, the one end is restored to its original shape, and is elastically fitted to one end of the oil separation chamber 16, and the separator pipe 18 is surrounded by the circumference of the oil separation chamber 16. Secure to the side wall. The hole 21 is closed using the lid member 22 after the separator pipe 18 is attached.

In the scroll compressor according to the present embodiment, power from a drive source (not shown) is transmitted to one end of the main shaft 7 via the electromagnetic clutch 10, and the main shaft 7 is rotationally driven. The rotation of the main shaft 7 is converted into a turning motion by the eccentric pin 12 and the bush 13 and transmitted to the movable scroll 2, and the movable scroll 2 turns. Refrigerant gas sucked into the suction chamber 5 through the suction port from the low-pressure side circuit of the air conditioner is taken into a pair of working spaces 3 on the outer peripheral side formed by the spiral bodies 1b and 2b. The ball coupling 15 prevents the movable scroll 2 from rotating.
The pair of working spaces 3 move toward the center of the fixed scroll 1 while reducing the volume, and the refrigerant gas in the working spaces 3 is compressed. A high-pressure refrigerant gas is discharged into the discharge chamber 6 through the discharge hole 1 c formed in the end plate 1 a of the fixed scroll 1 and the discharge valve. The high-pressure refrigerant gas flows from the discharge chamber 6 through the opening 17 into the annular gap 16a of the oil separation chamber 16 in a tangential direction, and flows toward the other end of the separator pipe 18 while turning in the annular gap 16a. It flows into the separator pipe 18 and flows out from one end of the separator pipe 18 whose diameter has been enlarged to the high-pressure circuit of the air conditioner through the discharge port.

When the refrigerant gas swirls in the annular gap 16a and flows toward the other end of the separator pipe 18, the oil mist dispersed and suspended in the refrigerant gas by the centrifugal force is separated from the refrigerant gas, and the peripheral wall of the oil separation chamber 16 Adhere to. The oil mist adhering to the peripheral side wall of the oil separation chamber 16 flows toward the bottom of the oil separation chamber 16 while forming droplets, and is accumulated at the bottom of the oil separation chamber 16. The oil accumulated at the bottom of the oil separation chamber 16 is returned to the suction chamber 5 through an oil passage (not shown) and lubricates various sliding portions of the compression mechanism.

In the oil separator provided in the scroll compressor A according to the present embodiment, a protrusion 20 directed radially inwardly engageable with one end of the separator pipe 18 is formed at one end of the oil separation chamber 16. Therefore, the separator pipe 18 cannot escape from one end of the oil separation chamber 16 to the outside of the oil separation chamber. Since the enlarged diameter portion of the separator pipe 18 is elastically fitted to the enlarged diameter portion of the oil separation chamber 16, the separator pipe 18 cannot move toward the inner depth of the oil separation chamber 16.
In the scroll compressor A according to the present embodiment, it is not necessary to press-fit the separator pipe 18 into one end portion of the oil separation chamber 16, and a discharge pipe is inserted to the vicinity of one end portion of the oil separation chamber 16 or the oil separation chamber. Since it is not necessary to attach a retaining ring to one end portion of 16, the labor required to attach the separator pipe 18 to the oil separation chamber 16 is reduced as compared with the prior art.
By extending the protrusion 20 over the entire circumference of the peripheral side wall of the oil separation chamber 16, it is possible to reliably prevent the occurrence of a situation where the separator pipe 18 comes out of the oil separation chamber from one end of the oil separation chamber 16.

  The present invention can be widely used not only for scroll type compressors but also for various types of compressors equipped with centrifugal oil separators.

It is sectional drawing of the compressor which concerns on the Example of this invention. It is a block diagram of the separator pipe which comprises the oil separation apparatus with which the compressor which concerns on the Example of this invention is provided. (A) is sectional drawing, (b) is a bb arrow line view of (a).

Explanation of symbols

1 fixed scroll 1a end plate 1b spiral body 1c discharge hole 2 movable scroll 2a end plate 2b spiral body 4 housing 5 suction chamber 6 discharge chamber 16 oil separation chamber 16a annular gap 18 separator pipe 18a slit 20 protrusion

Claims (2)

A compression mechanism; a housing that houses the compression mechanism; a discharge passage that is formed in the housing and discharges high-pressure gas discharged from the compression mechanism to the outside of the housing; and a centrifugal oil separator disposed in the middle of the discharge passage The oil separator is inserted into the oil separation chamber forming a part of the discharge passage with an annular gap from the circumferential wall of the oil separation chamber, and one end portion in which a slit extending in the longitudinal direction is formed is the oil separation chamber A compressor having a separator pipe that is elastically fitted to one end, and a protrusion that is directed radially inward and engageable with one end of the separator pipe is formed at one end of the oil separation chamber. The compressor according to claim 1, wherein the protrusion extends over the entire circumference of the peripheral wall of the oil separation chamber.

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