JPS62162787A - Compressor - Google Patents

Abstract

PURPOSE:To reduce the number of parts, by a method wherein an oil guide passage, through which oil separated from coolant gas flows down, a passage for reserving oil, and a compressor case are integrally formed. CONSTITUTION:Recessed parts 7 and 8, nipping a recessed part 6 therebetween, are formed in the inner wall surface of a closing part 5 of a case body 2 of a compressor case 1. A pair of discharge passages 9 and 9' are integrally formed in the upper inner wall surface of the closed part 5, and passages 10 and 10' for reserving oil are integrally provided in the lower inner wall surface. Further, a separating chamber 17 is connected to the passages 10 and 10' for reserving oil through oil guide passages 25 and 25'. This constitution reduces the number of parts of an oil separating mechanism compared with that of a conventional type.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a compressor used, for example, as a refrigerant compressor for an automobile air conditioner.

(Prior art and its problems) In the conventional compressor of this type, the oil separation mechanism is such that a cover b is fixed to the outer surface of the pump housing a and a discharge port C is provided in the cover b, as shown in FIGS. 5 to 8. A discharge pressure chamber d communicating with the oil separation chamber f is formed, and a pipe e is provided at the rear end of the cover b. It was aimed at one point.

The refrigerant gas discharged from the discharge port C is guided through the pipe e and collided with each other in the oil separation chamber f to separate the oil in the refrigerant gas.

However, as described above, the oil separation mechanism in the conventional compressor has a large number of parts such as the cover b, the pipe e, and the oil separation chamber f, resulting in a complicated configuration, which contributes to the increase in the cost of the compressor.

(Object of the Invention) The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a compressor that can reduce costs by having an oil separation mechanism with a small number of parts and a simple configuration.

(Means for Solving the Problems) In order to achieve the above object, the present invention constitutes a pump housing by sandwiching a cam ring between a front side block and a rear side block, and the pump housing is placed inside a compressor case. A discharge pressure chamber for discharged refrigerant gas is formed between the compressor case and the pump housing and is sandwiched between the front side block and the rear side block, and the rear side block has a plurality of chambers communicating with the discharge pressure chamber. a separation chamber provided with a discharge port and configured to separate oil in the refrigerant gas by colliding the respective discharged refrigerant gases discharged from the discharge port; and a refrigerant gas from which the oil has been separated. A discharge passage, an oil conduit through which the oil separated from the refrigerant gas flows down, and an oil reservoir passage for the oil flowing down the oil conduit are integrally formed with the compressor case.

(Function) The discharged refrigerant gas discharged from the discharge port is guided from the discharge pressure chamber through the discharge port to the separation chamber, and in this separation chamber, the discharged refrigerant gases are made to collide with each other to separate oil from the refrigerant gas. The separated refrigerant gas is discharged from a discharge passage, and the separated oil is stored in an oil reservoir passage through an oil guide passage.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. FIG. 1 shows a longitudinal cross-sectional view of a compressor according to the present invention,
In the figure, 1 is a compressor case, and this compressor case 1 is equipped with a cylindrical case body 2.
A front head 4 is fitted and fixed to the front end of the case body 2 via an O-ring 3, and the rear end of the case body 2 is closed, and this closed section 5 is made thick.

A circular recess 6 is formed in the center of the inner wall surface of the closing portion 5 on the rear side of the case body 2, and the inner wall surface of the closing portion 5 is separated into left and right sides with the recess 6 in between. A pair of discharge passages 9.9' and a pair of oil reservoir passages 10.10' are formed in the upper part and lower part of the inner wall surface of the closing part 5, respectively. It is.

A pump housing 11 is housed in the compressor case 1, and the pump housing 11 has a cam ring 14 sandwiched between a front side block 12 and a rear side block 13. A circular convex portion 16 surrounding the shaft support portion 15 is formed.

This convex portion 16 is hermetically fitted into the recess 6.

The rear side block 13 closes the separation recess 7.8 to form a separation chamber 17. The separation chamber 17 communicates with the discharge passage 9,9', and the upper part of the separation chamber 17 forms a collision point 18 of the discharged refrigerant gas.

Further, a guide wall 21.21' for guiding the discharged refrigerant gas to the collision point 18 is provided at the lower edge of the inlet portion 19.19' of the discharge passages 9, 9'.
A gap 22, 22' for oil return is formed between the end surface of the rear side block 1' and the rear wall surface of the rear side block 13. Furthermore, cutouts 23.23' are formed in the upper circumferential side of the rear side block 13, and these cutouts 23.23' communicate with the inlet portion 19.19' of the discharge passage 9°9'.
The bottom rear edge of ' is formed into a beveled part 24, 24'.

Further, the separation chamber 17 communicates with the oil reservoir passage 10.10' through an oil conduit 25.25'. The oil guide grooves 26, 26' formed on the inner wall surface of the rear side block 13 and the rear wall surface of the rear side block 13 form the oil guide grooves 25, 25'. .

A rotor 29 fitted onto a rotating shaft 28 is rotatably housed within the pump housing 11.

As shown in FIG. 2, this rotor 29 is provided with a plurality of slit-shaped vane grooves 30 along its radial direction and at equal intervals in the circumferential direction. 31 are inserted so as to be able to move forward and backward, and these vanes 31, the inner surface of the pump housing 24, and the rotor 29
The pump chamber 32 is defined by a space surrounded by the outer peripheral surface of
is formed.

The rotating shaft 28 is supported at its substantially middle and end portions by the respective support portions 33 and 15 of the front side block 12 and rear side block 13 via roller bearings 35 and 36, and the tip portion of the rotating shaft 28 On the side, the shaft seal chamber 37 provided in the front head 4 is connected to the seal member 3.
It penetrates in an airtight state at point 8.

The front head 23 is provided with a suction pressure chamber 39, which communicates with a suction port 40 provided on the peripheral wall of the front head 23. It communicates with the suction side of the pump chamber 32 via the pump chamber 32.

A discharge pressure chamber 43 is provided between the outer surface of the pump housing 11 and the inner surface of the cylindrical case body 2, and this discharge pressure chamber 43 is connected to the It communicates with the separation chamber 17, and the discharge pressure chamber 43 is connected to the discharge valve 4 provided on the peripheral wall of the cam ring 14.
It communicates with the pump chamber 32 via two discharge ports 46.

Next, the operation of the compressor according to the present invention configured as described above will be explained. When the rotating shaft 28 is rotated by an engine or the like, and the rotor 29 is rotated together with the rotating shaft 28, the tip of the vane 31 comes into close contact with the inner peripheral surface of the cam ring 14.
During the suction stroke in which the volume of the pump chamber 32 defined by the inner surface of the pump housing 11, the outer peripheral surface of the rotor 29, and the vane 13 gradually expands, the refrigerant gas, which is the fluid to be compressed, enters the suction pressure chamber 39 from the suction port 40. Inhaled into pump chamber 32
to go into.

The refrigerant gas in the pump chamber 32 is compressed in the compression stroke to reduce the volume of the pump chamber 32, pushes open the discharge valve 42 in the discharge stroke at the end of the compression stroke, and is discharged from the discharge port 46 into the discharge pressure chamber 43. Then, it flows into the separation chamber 17 through a discharge port 41 provided in the rear side block 13.

The discharged refrigerant gas that has entered the separation chamber 17 is transferred to the guide wall 21.
．． 21' and collide from the left and right at the collision point 18, and the oil in the discharged refrigerant gas is separated from the refrigerant gas. The refrigerant gas from which the oil has been separated is discharged through the discharge passage 9
．． 9' and is sent to the refrigerant gas circulation system from the discharge port 44, and after heat exchange, returns to the suction port 40 again.

The oil separated from the discharged refrigerant gas flows through the guide wall 21.
．． 21' and the rear wall surface of the rear side block 13, and drips onto the oil guide path 25, 25' side.
．． 27' and collects in the oil sump passage 10.10'.

Further, a convex portion 16 surrounding the shaft support portion 15 of the rear side block 13 is hermetically fitted into a recess 6 of the closing portion 5 of the case body 2, and this recess 6 is independent of the separation chamber 17. Therefore, the pressure of the discharged refrigerant gas in the separation chamber 17 does not act on the shaft support portion 15 of the rear side block 13, and the conventional plate g for shutting off the compressor becomes unnecessary.

(Effects of the Invention) As detailed above, in the compressor according to the present invention, the front side block and the rear side block sandwich the cam ring to constitute the pump housing, and the pump housing is housed in the compressor case. A discharge pressure chamber for discharged refrigerant gas sandwiched between the front side block and the rear side block is formed between the lever compressor case and the pump housing, and the rear side block has a plurality of discharge ports communicating with the discharge pressure chamber. a separation chamber for colliding the respective discharged refrigerant gases discharged from the discharge ports to separate oil in the refrigerant gas; and a discharge passage for the refrigerant gas from which the oil has been separated. Since the oil conduit through which the oil separated from the refrigerant gas flows and the oil reservoir passage for the oil flowing down the oil conduit are integrally formed with the compressor case, oil separation in conventional compressors is avoided. Compared to a mechanism, the number of parts is reduced, the configuration is simpler, and the cost of the compressor can be reduced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a cross-sectional view taken along the line ■-■ in FIG. The figure is a cross-sectional view taken along line ■-■ in Figure 3, Figure 5 is a vertical cross-sectional view showing a conventional compressor, and Figure 6 is Figure 5 V.
A sectional view taken along the I-VI line. FIG. 7 is a view taken along the arrow direction in FIG. 5, and FIG. 8 is a perspective view of the cover and pipe portion. 9.9'...Discharge passage, 10.10'...Oil reservoir passage, 11...Pump housing, 12...Front side block, 13...Rear side block,
17...Separation chamber, 25.25'...Oil conduit, 4
1...Discharge port.

Claims (1)

[Claims] 1. A pump housing is constructed by sandwiching a cam ring between a front side block and a rear side block, the pump housing is housed in a compressor case, and the front side block and rear side block are placed between the compressor case and the pump housing. A discharge pressure chamber for discharged refrigerant gas is formed between the compressor case and the rear side block is provided with a plurality of discharge inlets communicating with the discharge pressure chamber, and each of the discharged refrigerant gas discharged from the discharge inlets is provided at the rear of the compressor case. a separation chamber for colliding discharged refrigerant gas to separate oil in the refrigerant gas; a discharge passage for the refrigerant gas from which the oil has been separated; an oil conduit through which oil separated from the refrigerant gas flows; and the oil conduit. A compressor characterized in that an oil reservoir passage for oil flowing down is formed integrally with the compressor case.