JP2003232287A - Scroll type compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scroll type compressor capable of removing dirt from lubricating oil force-fed from an oil reservoir chamber to an intake chamber without causing an increase in the number of parts and degradation of assembling property by disposing a filter in the scroll type compressor wherein the internal space of a housing is partitioned into the intake chamber and a discharge chamber by an end plate of a fixed scroll, and the oil reservoir chamber is formed at the lower part of the discharge chamber by a baffle plate extending in the discharge chamber from the housing toward the end plate of the fixed scroll, and further a communicating passage is provided for communicating the oil reservoir chamber with the intake chamber. <P>SOLUTION: The internal space of the housing is partitioned into the intake chamber and discharge chamber by the end plate of the fixed scroll, and a movable scroll, a turning drive mechanism and a rotation preventing mechanism are accommodated in the intake chamber. An oil reservoir chamber is formed at the lower part of the discharge chamber by the baffle plate extending in the discharge chamber from the housing toward the end plate of the fixed scroll, and the communicating passage is provided for communicating the oil reservoir chamber with the intake chamber. A micro clearance is formed between the baffle plate and the end plate of the fixed scroll. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a scroll type compressor.

[0002]

2. Description of the Related Art A fixed scroll having an end plate and a spiral body provided upright on the end plate, and an end plate and a spiral body provided upright on the end plate are engaged with the fixed scroll to form a plurality of working spaces. The movable scroll to be formed, the orbiting drive mechanism of the movable scroll, the rotation preventing mechanism of the movable scroll, the fixed scroll, the movable scroll, the housing for accommodating the orbiting drive mechanism and the rotation preventing mechanism, the end plate of the fixed scroll. The inner space of the housing is divided into a suction chamber and a discharge chamber, a movable scroll, a swivel drive mechanism, and a rotation prevention mechanism are housed in the suction chamber, and a baffle plate extending from the housing toward the end plate of the fixed scroll in the discharge chamber. A scroll-type compressor including an oil storage chamber formed in a lower portion of a discharge chamber and a communication passage that connects the oil storage chamber and the suction chamber is used. In the scroll compressor, the lubricating oil separated and removed from the refrigerant gas in the discharge chamber is stored in the oil storage chamber. Lubricating oil accumulated in the oil storage chamber is pressure-fed from the high-pressure oil storage chamber to the low-pressure suction chamber through the communication passage, and the swirl drive mechanism, the rotation prevention mechanism, the sliding contact portion between the fixed scroll and the movable scroll, etc. in the suction chamber are discharged. Lubricate. By separating and removing the lubricating oil from the refrigerant gas discharged from the discharge chamber to the external refrigerant circuit, the thermal efficiency of the external refrigerant circuit is improved.

[0003]

In the scroll compressor described above, a filter is attached to the communication passage in order to remove dust from the lubricating oil that is pressure-fed from the oil storage chamber to the suction chamber. Mounting the filter increases the number of parts and deteriorates the ease of assembly of the compressor. The present invention has been made in view of the above problems, and has a fixed scroll having an end plate and a scroll body erected on the end plate, and a fixed scroll having an end plate and a scroll body erected on the end plate. A movable scroll that meshes with the scroll to form a plurality of working spaces, a orbiting drive mechanism for the movable scroll, a rotation preventing mechanism for the movable scroll, a housing that houses the fixed scroll, the movable scroll, the orbiting driving mechanism, and the rotation preventing mechanism. The inner space of the housing is divided into a suction chamber and a discharge chamber by the end plate of the fixed scroll, and the movable scroll, the orbiting drive mechanism, and the rotation prevention mechanism are housed in the suction chamber, and the fixed scroll of the housing moves from the housing in the discharge chamber. A scroll compressor including an oil storage chamber formed in the lower portion of the discharge chamber by a baffle plate extending toward the end plate, and a communication passage that connects the oil storage chamber and the suction chamber. There are, and an object thereof is to provide a scroll compressor capable of removing dust from the lubricating oil pumped from the oil reservoir to the suction chamber without causing the deterioration of the growth and assembly of the parts by the filter disposed.

[0004]

In order to solve the above-mentioned problems, according to the present invention, a fixed scroll having an end plate and a spiral member erected on the end plate, and an end plate and the end plate erected. A movable scroll having a spiral body and engaging with the fixed scroll to form a plurality of working spaces, a swivel drive mechanism for the movable scroll, a rotation preventing mechanism for the movable scroll, a fixed scroll, a movable scroll, a swivel drive mechanism, and rotation. A housing for accommodating the prevention mechanism, the inner space of the housing is divided into an intake chamber and a discharge chamber by the end plate of the fixed scroll, and the movable scroll, the orbiting drive mechanism and the rotation prevention mechanism are accommodated in the intake chamber, An oil storage chamber formed in the lower part of the discharge chamber by a baffle plate that extends from the housing toward the end plate of the fixed scroll in the discharge chamber, and a communication passage that connects the oil storage chamber and the suction chamber. The equipped, to provide a scroll type compressor, wherein a small gap between the end plate of the fixed scroll and the baffle plate is formed. In the scroll compressor according to the present invention, dust is removed from the lubricating oil flowing into the oil storage chamber by the minute gap formed between the baffle plate and the end plate of the fixed scroll. It is possible to remove dust from the lubricating oil that is pressure-fed from the oil storage chamber to the suction chamber without causing an increase in the number of parts due to the filter arrangement and deterioration of the assemblability.

In a preferred embodiment of the present invention, the baffle plate is integrally formed with the housing. If the baffle plate is formed integrally with the housing, the number of parts is reduced and the manufacturing cost of the compressor is reduced.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A scroll type compressor for compressing an air conditioner refrigerant according to an embodiment of the present invention will be described. As shown in FIG. 1, the scroll compressor according to the present embodiment has an end plate 1
a and a scroll 1b having a fixed scroll 1 and an end plate 2
The movable scroll 2 having a and a scroll 2b is provided. The fixed scroll 1 and the movable scroll 2 mesh with each other to form a plurality of pairs of working spaces 3. The casing 4a is abutted and fixed to the front housing 4b, and cooperates with the front housing 4b to form the housing 4. The inner space of the housing 4 is divided into a suction chamber 5 and a discharge chamber 6 by the end plate 1a of the fixed scroll. A suction port (not shown) formed in the housing 4 communicates with the suction chamber 5. The suction port is connected to the low pressure side of the external refrigerant circuit. A discharge port (not shown) formed in the housing 4 communicates with the discharge chamber 6. The discharge port is connected to the high pressure side of the external refrigerant circuit.

A main shaft 7 is arranged in the suction chamber 5. The main shaft 7 is rotatably supported by the flot housing 4b via radial bearings 8 and 9. One end of the main shaft 7 projects to the outside of the front housing 4b. The 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. Bush 1
3 is slidably fitted on the eccentric pin 12. The bush 13 is housed in a boss 2c formed on the back surface of the end plate 2a of the movable scroll 2 via a radial bearing 14. Movable scroll 2 and front housing 4b
A ball coupling 15 is arranged between the and.

A discharge hole 16 is formed at the center of the end plate 1a of the fixed scroll. The discharge hole 16 communicates with the discharge chamber 6 via a discharge valve 17 attached to the end plate 1a.

A baffle plate 18 is arranged in the discharge chamber 6 and below the discharge hole 16. Baffle plate 18 is casing 4
It extends from a toward the end plate 1a of the fixed scroll.
A minute gap α is formed between the baffle plate 18 and the end plate 1a of the fixed scroll. The width of the minute gap α is set to a value smaller than the diameter of the small diameter portion 19b of the communication passage described later. The baffle plate 18 forms an oil storage chamber 6 a below the discharge chamber 6. A linear communication passage 19 that connects the lower portion of the oil storage chamber 6a and the lower portion of the suction chamber 5 is formed to penetrate the end plate 1a of the fixed scroll and the lower portion of the scroll 1b. The communication passage 19 has a long large diameter portion 19a on the oil storage chamber 6a side and a short small diameter portion 19b on the suction chamber 5 side.

In the scroll compressor according to this embodiment, the power of 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 driven to rotate. The movable scroll 2 revolves with the rotation of the main shaft 7, and the refrigerant gas sucked into the suction chamber 5 through the suction port is taken into the working space 3. The ball coupling 15 prevents the movable scroll 2 from rotating. The mist-like lubricating oil dispersed and suspended in the refrigerant gas is sucked into the suction chamber 5
The main shaft 7, the eccentric pin 12, the bush 13, the radial bearings 8, 9, 14, the ball coupling 15, the sliding contact portion between the movable scroll 2 and the fixed scroll 1, and the like are lubricated.

The working space 3 moves toward the center of the fixed scroll 1 while reducing its volume, and the refrigerant gas in the working space 3 is compressed. The compressed refrigerant gas is discharged into the discharge chamber 6 via the discharge hole 16 and the discharge valve 17 formed in the end plate 1a of the fixed scroll 1. The refrigerant gas collides with the surrounding wall of the discharge chamber 6. When the refrigerant gas collides with the surrounding wall of the discharge chamber 6, mist-like lubricating oil dispersed and suspended in the refrigerant gas adheres to the surrounding wall of the discharge chamber 6 and is separated and removed from the refrigerant gas. The lubricating oil separated from the refrigerant gas passes through the minute gap α between the baffle plate 18 and the end plate 1a of the fixed scroll and collects in the oil storage chamber 6a. When the lubricating oil passes through the minute gap α, dust having a diameter equal to or larger than the diameter of the small diameter portion 19b of the communication passage is removed from the lubricating oil. The refrigerant gas from which the lubricating oil has been separated and removed flows out to the high pressure side of the external refrigerant circuit via a discharge port (not shown). By separating and removing the lubricating oil from the refrigerant gas discharged from the discharge chamber to the external refrigerant circuit, the thermal efficiency of the external refrigerant circuit is improved.

The lubricating oil accumulated in the high-pressure oil storage chamber 6a is pressure-fed to the lower portion of the low-pressure suction chamber 5 through the communication passage 19 formed in the lower portion of the fixed scroll 1. Lubricating oil pumped to the lower part of the suction chamber 5 collects in the lower part of the suction chamber 5, and is carried to the upper part of the suction chamber 5 by the orbiting movable scroll 2, the bush 13, the rotating eccentric pin 12, and the like. The lubricating oil carried to the upper part of the suction chamber 5 flows downward, and the main shaft 7 in the suction chamber 5, the eccentric pin 12, the bush 13, the radial bearings 8, 9, 14, the ball coupling 15,
Lubricate the sliding contact portion between the movable scroll 2 and the fixed scroll 1.

Since the baffle plate 18 is disposed and the oil storage chamber 6a is formed in the lower portion of the discharge chamber 6, the lubricating oil accumulated in the oil storage chamber 6a is blown up by the refrigerant gas discharged into the discharge chamber 6 and is again mist. There is no fear, and it is reliably pumped to the suction chamber 5. In order to maintain the liquid level of the lubricating oil accumulated in the oil storage chamber 6a above the end of the communication passage 19 on the discharge chamber 6 side, it is necessary to maintain the flow rate of the lubricating oil passing through the communication passage 19 at a minute value. desirable. Therefore, it is desirable that the communication passage 19 has a small diameter. However, it is difficult to form the small diameter communication passage 19 in the fixed scroll 1 over the entire length. Communication passage 19
If a large diameter portion 19a is used as a large part and a remaining diameter portion is used as a small diameter portion 19b, the communication passage 1 can be formed while ensuring the ease of processing the communication passage 19.
The flow rate of the lubricating oil passing through 9 can be maintained at a very small value.

When the lubricating oil passes through the minute gap α between the baffle plate 18 and the end plate 1a of the fixed scroll, dust having a diameter larger than the diameter of the small diameter portion 19b of the communication passage is removed from the lubricating oil. , Small diameter part 1 of communication passage due to dust contained in lubricating oil
There is no possibility that 9b will be clogged. Without increasing the number of parts due to the arrangement of the filter and deteriorating the assemblability,
Dust can be removed from the lubricating oil that is pressure-fed to the suction chamber 5 from the oil storage chamber 6a.

The baffle plate 18 may be fixed to the casing 4a by screwing or welding, or the baffle plate 18 may be formed integrally with the casing 4a. Baffle plate 18 casing 4
If it is formed integrally with a, the number of parts is reduced and the manufacturing cost of the scroll compressor is reduced. An end portion of the baffle plate 18 in the longitudinal direction (direction orthogonal to the paper surface in FIG. 1) may contact the casing 4a or may be integrated with the casing 4a. The longitudinal end of the baffle plate 18 may be separated from the casing 4a by a minute gap smaller than the diameter of the small diameter portion 19b of the communication passage. The minute gap promotes the inflow of the lubricating oil separated and removed from the refrigerant gas in the discharge chamber 6 into the oil storage chamber 6a.

A baffle plate is arranged in the discharge chamber and below the discharge hole, and an oil storage chamber is formed below the baffle plate, and the lubricating oil separated and removed from the discharged refrigerant gas is stored in the oil storage chamber and lubricated in the oil storage chamber. The technique according to the present invention that returns oil to the suction chamber or the crank chamber and forms a minute gap between the baffle plate and the discharge chamber surrounding wall is not limited to a scroll compressor, but a piston compressor, a vane compressor, etc. It is also applicable to other types of compressors.

[0017]

As described above, in the scroll compressor according to the present invention, dust is removed from the lubricating oil flowing into the oil storage chamber by the minute gap formed between the baffle plate and the end plate of the fixed scroll. To be done. It is possible to remove dust from the lubricating oil that is pressure-fed from the oil storage chamber to the suction chamber without causing an increase in the number of parts due to the filter arrangement and deterioration of the assemblability.

[Brief description of drawings]

FIG. 1 is a side sectional view of a scroll compressor according to an embodiment of the present invention.

[Explanation of symbols]

1 fixed scroll 1a End plate 1b spiral body 2 Movable scroll 2a End plate 2b spiral body 3 working space 4 housing 4a casing 4b front housing 5 Inhalation chamber 6 discharge chamber 6a Oil storage chamber 18 baffle 19 passages 19a Large diameter part 19b Small diameter part α Minute gap

Continued front page    (72) Inventor Kiyofumi Ito             20, Kotobukicho, Isesaki-shi, Gunma Sanden shares             In the company (72) Inventor Masaaki Takahata             20, Kotobukicho, Isesaki-shi, Gunma Sanden shares             In the company F-term (reference) 3H029 AA02 AA15 AA17 AB03 BB36                       CC25 CC43                 3H039 AA02 AA12 BB11 BB16 CC03                       CC29

Claims (2)

[Claims] 1. A fixed scroll having an end plate and a spiral body erected on the end plate, and an end plate and a spiral body erected on the end plate. The movable scroll to be formed, the orbiting drive mechanism of the movable scroll, the rotation preventing mechanism of the movable scroll, the fixed scroll, the movable scroll, the housing for accommodating the orbiting drive mechanism and the rotation preventing mechanism, the end plate of the fixed scroll. The inner space of the housing is divided into a suction chamber and a discharge chamber, a movable scroll, a swivel drive mechanism, and a rotation prevention mechanism are housed in the suction chamber, and a baffle plate extending from the housing toward the end plate of the fixed scroll in the discharge chamber. It has an oil storage chamber formed in the lower part of the discharge chamber and a communication passage that connects the oil storage chamber and the suction chamber, and a minute gap is formed between the baffle plate and the end plate of the fixed scroll. A scroll type compressor characterized by being used. 2. The scroll compressor according to claim 1, wherein the baffle plate is integrally formed with the housing.