JP2007192047A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conventional compressor provided with a centrifugal separation type oil separator of improved oil separation performance as compared with before. <P>SOLUTION: This compressor is provided with a compression mechanism, a housing storing the compression mechanism, a delivery passage formed in the housing, and the centrifugal separation type oil separator provided in a middle of the delivery passage. A pair of delivery gas introduction ports to the oil separator are provided in point symmetry in relation to a center axis line of the oil separator. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

A compression mechanism, a housing that houses the compression mechanism, a discharge passage that is formed in the housing and discharges 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 A compressor provided is disclosed in Patent Document 1 and the like.
JP 2001-295767 A

In a conventional compressor provided with a centrifugal oil separator, the number of discharge gas inlets provided in the oil separator is generally one. For this reason, a strong discharge gas swirl cannot be formed, and sufficient oil separation performance cannot be obtained.
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 having improved oil separation performance as compared with the conventional one.

In order to solve the above problems, in the present invention, a compression mechanism, a housing that houses the compression mechanism, a discharge passage formed in the housing, and a centrifugal oil separator disposed in the middle of the discharge passage And a discharge gas introduction port to the pair of oil separators is provided point-symmetrically with respect to the center axis of the oil separator.
In the present invention, since the discharge gas inlets to the pair of oil separators are arranged point-symmetrically with respect to the central axis of the oil separator, a strong discharge gas swirl flow can be obtained. As a result, the oil separation performance is improved as compared with the conventional one.

In a preferred aspect of the present invention, the discharge gas introduction ports to two or more pairs of oil separators are arranged symmetrically with respect to the central axis of the oil separator.
The compressor according to claim 1.
By disposing the discharge gas inlets to a plurality of pairs of oil separators symmetrically with respect to the central axis of the oil separator, a stronger discharge gas swirl flow can be obtained. As a result, the oil separation performance is further improved.

In the present invention, since the discharge gas inlets to the pair of oil separators are arranged point-symmetrically with respect to the central axis of the oil separator, a strong discharge gas swirl flow can be obtained. As a result, the oil separation performance is improved as compared with the conventional one.

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 adjacent to the discharge chamber 6 and communicating with the discharge chamber 6 and the discharge port is formed in the casing 4a. The discharge chamber 6 and the oil separation chamber 16 form a discharge passage for discharging the gas discharged from the compression mechanism to the outside of the housing 4. A separator pipe 17 is disposed in the oil separation chamber 16, coaxially with the oil separation chamber 16, and spaced from the peripheral side wall of the oil separation chamber 16 with an annular gap 16 a. One end of the separator pipe 17 is in the oil separation chamber 16 and the other end is press-fitted and fixed to the inlet of the oil separation chamber 16 and communicates with the discharge port (not shown). The oil separation chamber 16, the annular gap 16 a, and the separator pipe 17 form a centrifugal oil separator 18.
As shown in FIG. 2, the peripheral wall near the inlet of the oil separation chamber 16 is point-symmetrical with respect to the center axis (the center axis of the oil separation chamber 16) X of the oil separator 18. Discharge gas introduction ports 19 and 20 are disposed. The discharge gas introduction ports 19 and 20 communicate with the discharge chamber 6 through discharge gas passages 19a and 20a.

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 discharge gas passages 19a and 20a into the annular gap 16a of the oil separation chamber 16 in a tangential direction as shown by white arrows in FIG. , Flows toward the one end of the separator pipe 17, flows into the separator pipe 17, and flows out from the other end of the separator pipe 17 to the high-pressure circuit of the air conditioner through the discharge port.

When the high-pressure refrigerant gas swirls in the annular gap 16a and flows toward the one end of the separator pipe 17, the oil mist dispersed and suspended in the refrigerant gas by the centrifugal force is separated from the refrigerant gas, and the oil separation chamber 16 It adheres to the peripheral side wall. 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 scroll compressor A according to the present embodiment, the discharge gas inlets 19 and 20 to the pair of oil separators 18 are arranged symmetrically with respect to the central axis X of the oil separator 18. Discharge gas swirl flow can be obtained. As a result, the oil separation performance is improved as compared with the conventional one.

Two or more pairs of discharge gas inlets to the oil separator 18 may be arranged symmetrically with respect to the central axis X of the oil separator 18.
By disposing the discharge gas inlets to the plurality of pairs of oil separators 18 in point symmetry with respect to the central axis X of the oil separator 18, a stronger discharge gas swirl flow can be obtained. As a result, the oil separation performance is further improved.

  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 an II-II arrow line view of FIG.

Explanation of symbols

DESCRIPTION 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 17 Separator pipes 19 and 20 Discharge gas inlet

Claims (2)

A compression mechanism, a housing that houses the compression mechanism, a discharge passage that is formed in the housing and discharges 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 And a discharge gas introduction port to the pair of oil separators is disposed symmetrically with respect to the center axis of the oil separator. The compressor according to claim 1, wherein discharge gas introduction ports to two or more pairs of oil separators are arranged symmetrically with respect to the central axis of the oil separator.

Images