JPH0932780A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll-type compressor which can drastically reduce vibration and noise, and having high performance, by efficiently absorbing and damping pulsation. SOLUTION: In a compressor, a rib 20 is erected on an inner surface 19 of a casing 3 and facing toward a bottom plate 13 of a fixed scroll 12, the tip 21 of the rib 20 is brought in contact with the bottom plate 13, a discharging chamber 18 is formed between the inner surface 19 of the casing 3 and the bottom plate 13, and compressed fluid discharged in the discharging chamber 18 is made to pass through a passage 22 in the discharging chamber to be regulated by the rib 20. The rib 20 is formed into such a shape that free expansion is substantially allowed to the compressed fluid in the discharging chamber 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used in, for example, a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, scroll type compressors having a fixed scroll and a movable scroll are well known. In this type of compressor, as shown in FIG. 7, the movable scroll 70 has a bottom plate 71 and an eddy coil 72 provided on the bottom plate 71. Also, the spiral body 72
The vortex winding body 75 provided on the bottom plate 74 of the fixed scroll 73 is engaged with the fixed scroll 73 at different angles. A discharge hole 76 communicating with the discharge chamber 79 is provided at substantially the center of the bottom plate 74 of the fixed scroll 73. A discharge valve 77 is provided in the discharge hole 76, and the lift amount of the discharge valve 77 comes into contact with a retainer 78 to be regulated.

The discharge chamber 79 has an inner surface 81 of a casing 80.
And a bottom plate 74 of the fixed scroll 73 as a valve plate. Further, a rib 82 as shown in FIG. 8 is provided upright on the inner surface 81 of the discharge chamber 79, and the tip end portion 83 of the rib 82 comes into contact with the bottom plate 74.

In the compressor as described above, when the eccentric bush 85 rotates and the orbiting motion is imparted to the orbiting scroll 70 whose rotation is prevented by the ball bearing 86, it is formed by the two spiral scrolls 72, 75. The fluid pocket is moved toward the center with decreasing volume to compress the fluid. And the compressed fluid is
Discharge from the discharge hole 76 into the discharge chamber 79.

The compressed fluid discharged into the discharge chamber 79 passes through the discharge chamber flow path 84 regulated by the ribs 82 and is sent from a discharge port (not shown) to an external path. In such a compressor, suction, compression, and discharge of the fluid are sequentially repeated, so that more or less pulsation occurs.

[0006]

However, in the compressor as described above, the compressed fluid discharged into the discharge chamber 79 flows mainly along the discharge chamber passage 84 whose shape is determined by the ribs 82. Therefore, the free expansion of the fluid discharged into the discharge chamber 79 is inevitably restricted. As a result, the pulsation is difficult to be absorbed in the discharge chamber, and is transmitted to the discharge pipe or the condenser connected to the compressor, and appears as vibration or noise more or less.

An object of the present invention is to provide a high-performance compressor capable of significantly reducing vibration and noise by effectively and surely absorbing or attenuating pulsation at the stage of the discharge chamber of the compressor. To aim.

[0008]

In order to solve the above-mentioned problems, a rib is erected on the inner surface of the casing in the direction of the valve plate, and the tip of the rib is brought into contact with the valve plate, and the inner surface of the casing is abutted. And a valve plate, a discharge chamber is formed between the discharge chamber and the compression plate, and the compressed fluid discharged into the discharge chamber passes through the discharge chamber flow path regulated by the rib.
The compressed fluid is formed in a shape that allows substantially free expansion in the discharge chamber.

In the ribs, a part in the extending direction of the ribs is notched so that the front end portion in the height direction of the rib or the entire rib height direction communicates with both sides of the rib portion. Is desirable.

Further, the rib may be formed in a shape having a through hole communicating with both sides of the rib.

In order to solve the above-mentioned problems, another compressor of the present invention has ribs provided upright on the inner surface of the casing in the direction of the valve plate, and the tips of the ribs contact the valve plate. In the compressor, the discharge chamber is formed between the inner surface of the casing and the valve plate, and the compressed fluid discharged into the discharge chamber passes through the discharge chamber flow path regulated by the rib. Of at least a part of the inner surface of the casing of the surface forming the ridge.

In the compressor as described above, by providing the rib with a notch or by providing the rib with a through hole, the state in which the compressed fluid is regulated by the rib wall in the discharge chamber is alleviated. The free expansion of the compressed fluid is substantially allowed. By allowing free expansion of the compressed fluid in the discharge chamber, the pulsation of the compressed fluid is efficiently absorbed, and the vibration and noise associated with the pulsation are significantly reduced in the discharge chamber.

The above free expansion is achieved as follows.
That is, the rib is formed in a part of the extending direction of the rib.
By forming a notch that communicates both sides of the rib portion at the tip of the rib in the height direction or at the entire height of the rib, the compressed fluid discharged into the discharge chamber is notched. The compressed fluid can be allowed to expand substantially freely.

Also, by forming a through hole in the rib so that both sides of the rib communicate with each other, the compressed fluid can freely flow back and forth on both sides of the rib wall through the through hole, so that the compressed fluid discharged into the discharge chamber is compressed. The fluid can be allowed to expand substantially freely.

The notches and through holes as described above are
Since it can be formed by extremely simple processing, cost increase can be suppressed to a minimum. Moreover, it can be easily applied to an existing compressor.

Further, in the above another compressor,
Since the unevenness is provided on at least a part of the inner surface of the casing among the surfaces forming the discharge chamber, the pulsation of the compressed fluid flowing along the inner surface of the unevenness is effectively damped, and the vibration and noise are greatly reduced. Is reduced to.

That is, by allowing the above-mentioned free expansion of the compressed fluid, the discharge chamber functions as a buffer tank that absorbs or attenuates surging.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a compressor according to the present invention will be described below with reference to the drawings. In the following embodiments, the present invention is applied to a scroll compressor, but the present invention is not limited to this, and the present invention is applicable to other compressors (for example, a swash plate compressor). ) Is also applicable.

1 to 3 show a scroll type compressor according to a first embodiment of the present invention. 1 in the figure
Indicates a compressor. The compressor 1 includes a front housing 2, a casing 3, and a clutch mechanism 24.
It is composed of

A rotary shaft 4 is rotatably supported on the front housing 2 via a bearing 5. A crank mechanism 6 is integrally provided at one end of the rotary shaft 4, and the crank mechanism 6 has a crank pin 6a.
The crank pin 6a is inserted into the eccentric bush 7,
The eccentric bush 7 is fitted in the protrusion 8 of the movable scroll 9.

The movable scroll 9 has a bottom plate 10 and an eddy coil 11 provided on the bottom plate 10. Further, the spiral scroll 11 has a bottom plate 13 of the fixed scroll 12.
The spiral body 14 provided on the upper side is engaged with each other by shifting the angle.

A discharge hole 15 communicating with a discharge chamber 18 is provided at a substantially central portion of a bottom plate 13 of the fixed scroll 12, and a discharge valve 16 is provided in the discharge hole 15. Further, the lift amount of the discharge valve 16 contacts the retainer 17 and is regulated.

The discharge chamber 18 is defined by the inner surface 19 of the casing 3 and the bottom plate 13 of the fixed scroll 12 as a valve plate. Further, on the inner surface 19 of the casing 3, ribs 20 extending toward the bottom plate 13 are provided upright. More specifically, the bottom plate 13 is fixed to the casing 3 by bolts 36 that pass through the bolt leg portions 35 of the ribs 20, and the tips of the bolt leg portions 35 of the ribs 20 come into contact with the bottom plate 13.

Further, in the discharge chamber 18, a discharge chamber flow path 2 for restricting the flow path of the compressed fluid discharged into the discharge chamber 18 is provided.
2 are provided. The discharge chamber flow passage 22 is substantially formed by the rib 20.

Further, the rib 20 is formed in a shape that allows the compressed fluid discharged into the discharge chamber 18 to substantially freely expand. Specifically, a notch 23 is provided at a distal end portion 21 in the rib height direction in a part of the rib 20 in the extending direction, and the notch 23 is formed into a shape in which both sides of the rib 20 can communicate with each other. Has been done.

In the scroll compressor according to this embodiment, the driving force is transmitted to the rotary shaft 4 via the clutch mechanism 24 from a drive source (not shown) such as an automobile engine or a drive motor. Then, with the rotation of the rotating shaft 4, the eccentric bush 7 into which the crank pin 6a of the crank mechanism 6 is inserted rotates.

A movable scroll 9 whose rotation is prevented by the ball coupling 25 by the rotation of the eccentric bush 7.
A turning motion is imparted to. Along with the swirling motion, the fluid pocket formed by the two spiral bodies 11, 14 moves toward the center while decreasing its volume, and the fluid sucked into the compressor 1 from the suction port 26 is compressed in the fluid pocket. The compressed fluid is discharged from the discharge hole 15 into the discharge chamber 18, and is regulated by the discharge chamber flow passage 22 while being sent from the discharge port 27 to an external path (not shown).

That is, in the scroll compressor according to the present embodiment, since the suction, compression, and discharge of the fluid are sequentially repeated as described above, more or less pulsation occurs.

However, in the scroll compressor according to the present embodiment, the rib 20 has a tip portion 21 and the rib 2
Since the notch 23 capable of communicating both sides of 0 is provided, the compressed fluid discharged from the discharge hole 15 into the discharge chamber 18 is regulated by the discharge chamber flow passage 22 while
It freely passes through the notch 23. That is, the state in which the compressed fluid is regulated by the rib 20 is significantly alleviated. Therefore, since substantially free expansion of the compressed fluid discharged into the discharge chamber 18 is allowed, pulsation can be efficiently absorbed in the discharge chamber 18, and vibration and noise can be significantly reduced. .

Further, in the present embodiment, the notch 23 of the rib 20 is provided at the tip 21 in the height direction of the rib 20, but the notch 23 is provided in the entire height direction of the rib 20. It may be provided.

In this embodiment, a chamfered portion 37 as shown in FIG. 3 may be provided at the end 28 of the notch 23 of the rib 20. Thereby, the discharge chamber 1
The compressed fluid discharged into 8 smoothly cuts out the notch 23
Can pass through. Therefore, smoother and free expansion of the compressed fluid discharged into the discharge chamber 18 is allowed, and the pulsation in the discharge chamber 18 is effectively absorbed, so that vibration and noise can be further reduced. is there. Further, an R portion may be provided instead of the chamfered portion 37.

4 and 5 show ribs 29 of the scroll compressor according to the second embodiment of the present invention. In this embodiment, a through hole 30 is formed in the rib 29, and both sides of the rib 29 are communicated with each other through the through hole 30.

In the present embodiment, the compressed fluid discharged into the discharge chamber 18 can freely pass through the through holes 30, so that substantial free expansion of the compressed fluid is allowed.
Vibration and noise can be greatly reduced. The number and shape of the through holes 30 are not particularly limited.

FIG. 6 shows a scroll type compressor according to a third embodiment of the present invention. In the present embodiment, the inner surface 32 of the casing 31 and the ribs 34 provided upright on the inner surface 32 are provided with irregularities 33. In the present embodiment, even if the compressed fluid is discharged into the discharge chamber 18 and some pulsation occurs, the inner surface 32 of the casing 31 and the ribs 3 are formed.
Since the pulsation is damped by the unevenness 33 provided on the No. 4, vibration and noise can be significantly reduced as a result.

In this embodiment, the casing 3
Although the unevenness 33 is provided on all of the inner surface 32 and the rib 34 of No. 1, it is not limited to this, and when the unevenness 33 is provided on the inner surface 32 of the casing 31 and / or part of the rib 34. However, since pulsation can be efficiently damped, vibration and noise can be significantly damped.

If this embodiment is combined with the first or second embodiment described above, the pulsation can be absorbed and damped, so that more effective vibration and noise reduction can be achieved. can do.

[0037]

As described above, according to the compressor of the present invention, the pulsation can be effectively absorbed and / or damped, so that a high-performance compressor with significantly reduced vibration and noise can be obtained. Can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a scroll compressor according to a first embodiment of the present invention.

FIG. 2 is a plan view of a casing of the scroll compressor shown in FIG.

FIG. 3 is an enlarged vertical cross-sectional view of ribs of the scroll compressor of FIG.

FIG. 4 is an enlarged plan view of ribs of the scroll compressor according to the second embodiment of the present invention.

5 is an enlarged vertical cross-sectional view of the rib of FIG.

FIG. 6 is a vertical sectional view of a casing of a scroll compressor according to a third embodiment of the present invention.

FIG. 7 is a partial vertical cross-sectional view of a conventional scroll compressor.

FIG. 8 is a plan view of the scroll compressor shown in FIG.

[Explanation of symbols]

 1 Compressor 2 Front Housing 3 Casing 4 Rotating Shaft 5 Bearing 6 Crank Mechanism 6a Crank Pin 7 Eccentric Bush 8 Protrusion 9 Movable Scroll 10 Bottom Plate 11 Whirlpool 12 Fixed Scroll 13 Bottom Plate 14 Whirlpool 15 Discharge Hole 16 Discharge Valve 17 Retainer 18 Discharge chamber 19 Inner surface 20 Rib 21 Tip 22 Discharge chamber flow path 23 Notch 24 Clutch mechanism 25 Ball coupling 26 Intake port 27 Discharge port 28 End 29 Rib 30 Through hole 31 Casing 32 Inner surface 33 Unevenness 34 Rib 35 Bolt leg 36 bolt 37 chamfer

Claims (4)

[Claims] 1. A rib is provided upright on the inner surface of the casing in the direction of the valve plate, the tip of the rib is brought into contact with the valve plate, and a discharge chamber is formed between the inner surface of the casing and the valve plate. A compressor that allows the compressed fluid discharged into the discharge chamber to pass through a flow path in the discharge chamber that is regulated by the rib, and the rib has a shape that allows the compressed fluid to substantially expand in the discharge chamber. A compressor characterized by being formed into. 2. The rib is cut in such a manner that, in a part in the extending direction of the rib, a tip portion in the height direction of the rib or the entire rib height direction communicates with both sides of the rib portion. The compressor of claim 1 lacking. 3. The compressor according to claim 1, wherein the rib has a through hole communicating with both sides of the rib. 4. A rib is provided upright on the inner surface of the casing in the direction of the valve plate, the tip of the rib is brought into contact with the valve plate, and a discharge chamber is formed between the inner surface of the casing and the valve plate. In a compressor that allows a compressed fluid discharged into the discharge chamber to pass through a flow path in the discharge chamber that is regulated by the ribs, at least a part of the inner surface of the casing of the surface forming the discharge chamber is provided with irregularities. A compressor characterized by that.