JPH1122665A - Hermetic electric scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor of high reliability and high efficiency. SOLUTION: A seal member 17 is mounted on an interval between the panel board 19 of a rotary scroll 8 and a bearing member 23, the lubricating oil stored inside of a sealed container 17, is acted on an inside area 18 partitioned by the seal member 17, and the intake port 12 of a compressing mechanism part 2, communicates with an outside area 22 of the seal member 17. Further a hole 26 in an axial direction, and a hole 27 in a radius direction communicating with the hole 26, are formed on the inside area 18 partitioned by the seal member 17 of the panel board 19 of the rotary scroll 8, and a throttle part 21 is formed on a part of the communication hole 20. Whereby a proper amount of the lubricating oil having passed through the eccentric bearing 7 and a shaft part 9 of the rotary scroll 8, can be supplied to the outside area 22 and a compressing operation space 13 from the inside area 18 of the seal member 17 through this throttle part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor for increasing the pressure of air or refrigerant gas.

[0002]

2. Description of the Related Art A conventional hermetic electric scroll compressor is:
As shown in FIG. 5, an electric motor 102 and a compression mechanism 105 that transmits and drives the rotational force of the electric motor by a crankshaft 104 supported by a bearing member 103 are provided inside the closed casing 101. ing. The compression mechanism 1
05 is a fixed scroll 106 having fixed spiral blades.
And a orbiting scroll 107 arranged to mesh with the fixed scroll 106 to form a plurality of compression work spaces 109.
07 performs a turning motion because its rotation is restricted by the Oldham ring 108. Thereby, the orbiting scroll 1
The volume of the compression work space 109 formed by the swirl vane 07 and the swirl vane of the fixed scroll 106 is sequentially reduced, and as a result, the gas is compressed. The compression efficiency of this type of scroll compressor depends on how much the leakage of the refrigerant gas from the contact surfaces of the scroll blades forming the compression space is reduced. In order to reduce the leakage, a technique is known in which lubricating oil stored in the sealed container 101 is introduced into the compression working space 109 and sealed by the oil film.

In the conventional scroll compressor, the lubricating oil pumped up by the pump device passes through the inside of the crankshaft 104 and branches off a part thereof immediately before lubricating the shaft portion 110 and the eccentric bearing 112 of the orbiting scroll 107. Provided on the shaft portion 110 and the end plate 111 of the orbiting scroll 107,
An appropriate amount of oil is supplied to the compression work space 109 by the throttle member 114 through the communication hole 113.

[0004]

In the above-mentioned scroll compressor, while the lubricating oil pumped from the pump device lubricates the eccentric bearing, a part branches without lubricating the eccentric bearing and is compressed through the throttle valve. It is used to seal both scrolls that form a working space. The amount of lubricating oil supplied to the compression working space through the throttle member is governed by the operating conditions of the compressor, especially the discharge pressure and suction pressure, and fluctuates during the actual operation of the compressor. It is difficult to stably obtain the supplied lubricating oil amount.

The present invention solves the above-mentioned problems of the prior art, and can stably obtain the amount of lubricating oil supplied to a sliding portion of an eccentric bearing, and compresses lubricating oil necessary for sealing. It is an object of the present invention to provide a highly reliable and highly efficient scroll compressor that can be supplied to a space.

[0006]

Means for solving the above problems are as follows.

The first means has an axial hole and a radial hole communicating with the axial hole in an inner area defined by a seal member of the end plate of the orbiting scroll, and a part of the communication hole has a throttle portion. And supplying lubricating oil from the inner region to the outer region of the seal member through the throttle portion.

A second means is to provide another part such as a throttle member in a part of the communication hole in the first means.

A third means is to provide an axial hole in the end plate of the orbiting scroll, which is opposed to an inner lower half area defined by the seal member, particularly in a horizontal scroll compressor, and communicates with the axial hole. A hole in the radial direction is formed, a throttle portion or a throttle member is provided in a part of the communication hole, and lubricating oil is supplied from the inner region to the outer region of the seal member via the throttle portion or the throttle member.

The fourth means has a concave portion in the end plate in which the inner region and the outer region of the seal member communicate with each other intermittently by the orbiting motion of the orbiting scroll. To supply lubricating oil to the area.

[0011]

The invention according to claim 1 has an axial hole and a radial hole communicating with the axial hole in an inner region defined by a seal member of the end plate of the orbiting scroll. A throttle portion is provided in a part of the hole, and lubricating oil is supplied from the inner region to the outer region of the seal member through the throttle portion. Lubricating between the eccentric bearings, then reaches the inner region of the seal member, partly passes through the communication hole and throttle portion provided in the end plate of the orbiting scroll and flows into the outer region,
It is taken into the compression working space together with the low-pressure refrigerant gas, and is used for sealing during the compression process by the oil film, and the remaining lubricating oil returns to the oil reservoir after lubrication between the crankshaft and the bearing member.

According to a second aspect of the present invention, as the throttle section,
Since another part such as a throttle member is provided in a part of the communication hole, the embodiment has the same configuration as that of the first embodiment.

According to a third aspect of the present invention, in the horizontal scroll compressor, particularly, the end plate of the orbiting scroll, which faces the inner lower half area defined by the sealing member, is provided.
An axial hole and a radial hole communicating therewith are provided, and a throttle portion or a throttle member is provided in a part of the communication hole, and an inner region and an outer region of the seal member are provided through the throttle portion or the throttle member. The lubricating oil pumped from the pump device first lubricates between the shaft part of the orbiting scroll and the eccentric bearing, and then reaches the inside area of the seal member, and a part of the end plate of the orbiting scroll Flows through the communication hole and the throttle portion or the throttle member provided below, into the outer region, and is taken into the compression working space together with the low-pressure refrigerant gas,
The oil film is used for sealing during the compression process, and the remaining lubricating oil returns to the oil sump after lubrication between the crankshaft and the bearing member.

According to a fourth aspect of the present invention, the end plate has a concave portion in which the inner region and the outer region of the seal member communicate with each other intermittently by the orbiting motion of the orbiting scroll. Since lubricating oil is supplied from the area to the outer area, the lubricating oil pumped from the pump device is
First, lubricate between the shaft of the orbiting scroll and the eccentric bearing,
After that, it reaches the inner area of the seal member, part of it intermittently flows into the outer area through the recess provided in the end plate of the orbiting scroll, is taken into the compression work space together with the low-pressure refrigerant gas, and is used for sealing during the compression process by the oil film. Used,
The remaining lubricating oil returns to the oil reservoir after lubrication between the crankshaft and the bearing member.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIG. 1, a compression mechanism 2, an electric motor 3, and a crankshaft 4 for transmitting the rotational force of the electric motor 3 to the compression mechanism 2 are arranged inside a closed container 1. Has been established. In addition, the closed vessel 1 is provided with a suction pipe 5 for sucking the low-pressure refrigerant gas and a discharge pipe 6 for discharging the high-pressure refrigerant gas compressed by the compression mechanism 2 to the outside of the closed vessel 1.

In the above configuration, when the electric motor unit 3 is driven, the rotational force generated thereby is transmitted to the compression mechanism unit 2 by the crankshaft 4. At this time, rotational force is transmitted from the eccentric bearing 7 provided on the crankshaft 4 through the shaft portion 9 of the orbiting scroll 8. The orbiting scroll 8 is
Since the rotation is restricted by the Oldham ring 10, as a result, the turning motion is performed in a state of being engaged with the fixed scroll 11. For this reason, the low-pressure refrigerant gas sucked from the suction port 12 of the compression mechanism section 2 through the suction pipe 5 is compressed from the outer periphery toward the center in the compression work space 13 formed by the orbiting scroll 8 and the fixed scroll 11. , Continuously compressed. Then, the high pressure refrigerant gas is discharged from the discharge port 14 of the compression mechanism 2 into the closed container 1 as a high-pressure refrigerant gas, and then discharged from the discharge pipe 6 to the outside of the closed container 1. On the other hand, the lubricating oil pumped from the lubricating oil reservoir 16 by the pump mechanism 15 provided at the end of the crankshaft 4 passes through the inside of the crankshaft 4 and first passes between the shaft 9 of the orbiting scroll 8 and the eccentric bearing 7. Because of lubrication, stable lubrication of the sliding part is possible. After that, it reaches the inner region 18 of the sealing member 17,
A part is provided with a communication hole 20 provided in the end plate 19 of the orbiting scroll 8.
And flows into the outer region 22 through the throttle portion 21, is taken into the compression working space 13 together with the low-pressure refrigerant gas, is used for sealing during the compression process by the oil film, and the remaining lubricating oil is used for the crankshaft 4 and the bearing member 23. After that, the lubrication oil reservoir 16 returns to the lubricating oil reservoir 16 after lubrication.

(Embodiment 2) In FIG. 2, the diaphragm 21 in the embodiment 1 is constituted by another component such as a diaphragm member 24.

(Embodiment 3) In FIG. 3, the end plate 19 of the orbiting scroll 8 corresponding to the inner lower half region 25 defined by the seal member 17 is communicated with the axial hole 26. The communication hole 20 is provided with a constricted portion 21 or a constricted member 24, and the constricted portion 21 or constricted member 24 is used to connect the inner region 18 to the outer region 22 of the seal member 17. , The lubricating oil pumped up by the pump mechanism 15 first lubricates between the shaft 9 of the orbiting scroll 8 and the eccentric bearing 7, thereby enabling stable lubrication to the sliding portion. . After that, it reaches the inner region 18 of the seal member 17, and a part thereof is provided with the communication hole 20 and the throttle unit 2 provided below the end plate 19 of the orbiting scroll 8.
1 or through the throttle member 24, flows into the outer region 22, is taken into the compression work space 13 together with the low-pressure refrigerant gas, and is used for sealing in the compression process by the oil film. Particularly in a horizontal scroll compressor, Even in a situation where the amount of lubricating oil pumped down during a low-speed operation or a transition, the axial hole 26 is arranged at the lower part, so that the compression working space 13 is reliably supplied with oil. FIG. 4 shows an existing range of an axial hole 26 provided in the end plate 19 of the orbiting scroll 8.

(Embodiment 4) In FIG.
Of the seal member 17 intermittently by the turning motion of
Since the end plate 19 has a concave portion 28 through which the outer and inner regions 8 pass, the lubricating oil is supplied from the inner region 18 to the outer region 22 of the seal member 17 through the concave portion 28. Since the oil first lubricates between the shaft portion 9 of the orbiting scroll 8 and the eccentric bearing 7, stable lubrication of the sliding portion becomes possible. Thereafter, the lubricating oil reaches the inner region 18 of the seal member 17, and a portion of the concave portion 28 provided in the end plate 19 of the orbiting scroll 8 intermittently connects the inner region 18 and the outer region 22 during the orbiting motion. 2
2 and is taken into the compression working space 13 together with the low-pressure refrigerant gas, and is used for sealing in the compression process by the oil film. The remaining lubricating oil returns to the lubricating oil reservoir after lubricating between the crankshaft 4 and the bearing member 23. In addition, FIG.
4 shows an example of a concave portion 28 provided in the end plate 19 of the orbiting scroll 8.

[0021]

The effects of the present invention are as follows.

According to the first aspect of the present invention, an axial hole and a radial hole communicating with the axial hole are formed in the end plate of the orbiting scroll in the inner area defined by the seal member. By providing a throttle portion in a part thereof, the lubricating oil pumped from the pump mechanism can be reliably supplied to the eccentric bearing and the orbiting scroll shaft without branching, thereby providing a highly reliable compressor. be able to. In addition, machining is easy because the axial hole depth is much shorter than before, and machining burrs generated in the communicating part with the radial hole are easy to remove. realizable. In addition, in the conventional communication hole position, the drawing portion is disposed at the communication portion between the axial hole and the radial hole due to processing, and processing becomes difficult. However, according to the present invention, the axial hole depth of the head plate is reduced. By adjusting to the distance, the axial hole can be used as the drawing portion, and further improvement in workability can be realized.

The effect of the invention described in claim 2 is as follows.
Similarly to the effect of the invention, the lubricating oil pumped up by the pump mechanism can be reliably supplied to the eccentric bearing and the shaft of the orbiting scroll without branching, and a highly reliable compressor can be provided.

According to the third aspect of the present invention, an axial hole is formed in the end plate of the orbiting scroll, which faces the inner half area defined by the seal member, and a radial hole communicating with the axial hole. The invention according to claim 1, wherein a throttle portion or a throttle member is provided in a part of the communication hole, and lubricating oil is supplied from an inner region to an outer region of the seal member via the throttle portion or the throttle member. As in the case of the effect described above, stable lubrication of the shaft portion and the eccentric bearing portion of the orbiting scroll becomes possible. Furthermore, since the axial hole of the end plate of the orbiting scroll is provided below, especially in the horizontal scroll compressor, even when the amount of lubricating oil pumped down during low speed operation or transition, etc. Refueling is ensured, and a compressor with high compression efficiency can be realized.

According to the fourth aspect of the present invention, in addition to the effect of the first aspect of the present invention, a concave plate in which the inner region and the outer region of the seal member are intermittently communicated with the end plate of the orbiting scroll intermittently by orbital movement. And the intermittent supply of lubricating oil from the inner region to the outer region of the seal member through the recess, so that the lubricating oil required for sealing the compression working space can be easily processed by providing no separate parts. Can be supplied. Further, since the throttle portion can be eliminated, the possibility of clogging can be eradicated, and a highly reliable and highly efficient compressor can be obtained for a long period of time.

[Brief description of the drawings]

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

FIG. 2 is a partial cross-sectional view of a hermetic electric scroll compressor according to a second embodiment of the present invention.

FIG. 3 is a partial sectional view of a hermetic electric scroll compressor according to a third embodiment of the present invention.

FIG. 4 is a perspective view of an orbiting scroll according to a third embodiment of the present invention.

FIG. 5 is a partial sectional view of a hermetic electric scroll compressor according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view of an orbiting scroll according to a fourth embodiment of the present invention.

FIG. 7 is a cross-sectional view of a conventional hermetic electric scroll compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Compression mechanism part 3 Motor part 4 Crankshaft 5 Suction pipe 6 Discharge pipe 7 Eccentric bearing 8 Orbiting scroll 9 Shaft part 10 Oldham ring 11 Fixed scroll 12 Suction port 13 Compression work space 14 Discharge port 15 Pump mechanism 16 Lubricating oil Reservoir 17 Seal member 18 Inner area 19 End plate 20 Communication hole 21 Restrictor 22 Outer area 23 Bearing member 24 Restrictor 25 Lower half area 26 Axial hole 27 Radial hole 28 Recess

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasushi Aiba 1006 Kazuma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] An electric motor and a compression mechanism that transmits and drives a rotational force of the electric motor by a crankshaft supported by a bearing member are provided in the closed container.
A fixed scroll having fixed spiral blades, a orbiting scroll arranged to mesh with the fixed scroll to form a plurality of compression work spaces, and an Oldham ring for restraining the rotation of the orbiting scroll, This orbiting scroll is formed of a shaft portion to which orbiting motion is transmitted from an eccentric bearing provided on a crankshaft, and a head plate serving as a base of a spiral blade, and a scroll member in which a seal member is disposed in a gap between the head plate and the bearing member. In the compressor, lubricating oil stored inside the sealed container is applied to an inner area defined by the seal member, and an outer area of the seal member is communicated with a suction port of the compression mechanism, and An inner hole defined by the seal member of the scroll head plate has an axial hole and a radial hole communicating therewith. The provided, hermetic electric scroll compressor and supplying the lubricating oil to the outside area from the inner region of the sealing member through the throttle portion. 2. The head according to claim 1, wherein the end plate of the orbiting scroll has an axial hole and a radial hole communicating therewith, and a throttle member is provided in a part of the communicating hole. Hermetic electric scroll compressor. 3. A closed casing is provided with an electric motor and a compression mechanism that transmits and drives a rotating force of the electric motor by a crankshaft supported by a bearing member, wherein the compression mechanism includes:
A fixed scroll having fixed spiral blades, a orbiting scroll arranged to mesh with the fixed scroll to form a plurality of compression work spaces, and an Oldham ring for restraining the rotation of the orbiting scroll, This orbiting scroll is formed by a shaft portion to which orbiting motion is transmitted from an eccentric bearing provided on a crankshaft, and a head plate serving as a base of a spiral blade, and a horizontal seal provided with a gap seal member between the head plate and the bearing member. In the scroll compressor, the lubricating oil stored inside the hermetic container is acted on an inner area defined by the seal member, and an outer area of the seal member is communicated with a suction port of the compression mechanism. An axial hole and a radial hole communicating with the axial hole are provided in the end plate of the orbiting scroll, which opposes the inner lower half area defined by the seal member. And a throttle portion or a throttle member is provided in a part of the communication hole, and lubricating oil is supplied from an inner region to an outer region of the seal member through the throttle portion or the throttle member. Scroll compressor. 4. An electric motor, and a compression mechanism that transmits and drives a rotating force of the electric motor by a crankshaft supported by a bearing member is disposed in the closed container.
A fixed scroll having fixed spiral blades, a orbiting scroll arranged to mesh with the fixed scroll to form a plurality of compression work spaces, and an Oldham ring for restraining the rotation of the orbiting scroll, This orbiting scroll is formed of a shaft portion to which orbiting motion is transmitted from an eccentric bearing provided on a crankshaft, and a head plate serving as a base of a spiral blade, and a scroll member in which a seal member is disposed in a gap between the head plate and the bearing member. In the compressor, lubricating oil stored inside the sealed container is applied to an inner area defined by the seal member, and an outer area of the seal member is communicated with a suction port of the compression mechanism, and Sealing characterized in that the end plate has a concave portion in which the inner region and the outer region surface of the seal member communicate with each other intermittently by the turning motion of the scroll. Electric scroll compressor.