JP2005061348A - Sealed compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealed compressor of inexpensive structure and less oil discharge quantity. <P>SOLUTION: In this sealed compressor, a motor part having a cooling medium passage 3 at an outer circumferential part is provided at an upper part in a sealed container 1, and a compression mechanism part 4 and lubricating oil are contained at a lower part. The sealed container 1 is formed of a cylindrical container 11 sealed at one end, and an upper cover part 12. In the upper cover part 12, a glass terminal 14 to supply external power to the motor part 2, and a discharge pipe 15 to let compression gas at the compression mechanism part 4 out of the sealed container 1 are provided. The upper cover part 12 of the sealed container 1 is formed to be roughly spherical. The glass terminal 14 is installed close to the center of the upper cover part 12. The discharge pipe 15 is provided at an angle along a spherical surface of the upper cover part 12, that does not coincide with the cooling medium passage 3 for the circumferential position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hermetic compressor used in a refrigerating apparatus such as an air conditioner or a refrigerator, a heat pump type water heater, a dryer, or the like.

Conventionally, a hermetic compressor using a high saturation pressure HFC32 or a mixture of HFC32 and HFC125 or carbon dioxide gas as a refrigerant, as shown in FIG. The glass terminal 103 is provided in the center of the discharge pipe 104, and the discharge pipe 104 is configured at a position shifted from the center of the upper lid portion 102 (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-22679

  The refrigerant gas compressed by the compression mechanism in the hermetic container passes through a refrigerant passage provided in the outer periphery of the motor unit and is sent to the upper space of the motor unit. In this refrigerant gas, refrigeration oil for lubricating the compression mechanism is present as oil droplets. Therefore, after the oil droplets that have flown out of the refrigerant passage collide with and adhere to the inner surface of the upper lid portion, the inner surface of the upper lid portion is substantially spherical and is pushed upward by the flow of the refrigerant gas. At this time, since the discharge pipe is provided at a position along the spherical surface, the oil droplets separated from the refrigerant gas are discharged from the discharge pipe to the refrigeration cycle outside the compressor, and the efficiency of the refrigeration cycle is lowered. It was. The present invention solves such a conventional problem, and an object thereof is to provide a hermetic compressor with an inexpensive structure and a small oil discharge amount.

  In order to solve the above problems, the present invention is a hermetic compressor in which a motor part having a refrigerant passage in the outer peripheral part in the upper part of the hermetic container and a compression mechanism part and lubricating oil are accommodated in the lower part. Is formed from a sealed cylindrical container and an upper lid part, and a gas terminal for supplying external power to the motor part and gas compressed by the compression mechanism part are discharged to the upper lid part from the sealed container. A discharge pipe is provided, the upper lid portion of the sealed container has a substantially spherical shape, the glass terminal is attached near the center of the upper lid portion, and the discharge pipe is positioned along the spherical surface of the upper lid portion and the refrigerant passage Is provided at an angle that does not match in the circumferential position.

  The hermetic compressor of the present invention is a hermetic compressor in which a motor part having a refrigerant passage in the outer peripheral part and a compression mechanism part in the lower part are accommodated in the upper part of the hermetic container, and the hermetic container is a cylinder sealed on one side. And a discharge terminal for discharging the gas compressed by the compression mechanism to the outside of the sealed container. An upper lid portion of the sealed container is formed in a substantially spherical shape, the glass terminal is attached near the center of the upper lid portion, the discharge pipe is positioned along the spherical surface of the upper lid portion, and is positioned circumferentially with respect to the refrigerant passage Are provided at an angle that does not coincide with each other, and it is possible to provide a hermetic compressor with an inexpensive structure and a small oil discharge amount.

Further, the hermetic compressor of the present invention is a hermetic compressor in which a compression mechanism part having a refrigerant passage in the outer peripheral part in the upper part of the hermetic container and a motor part in the lower part are housed. A cylindrical terminal and an upper lid part, and a glass terminal for supplying an external power source to the motor part and a discharge for discharging the gas compressed by the compression mechanism part to the outside of the sealed container. A tube is provided, the upper lid portion of the sealed container has a substantially spherical shape, the glass terminal is attached near the center of the upper lid portion, and the discharge pipe is positioned along the spherical surface of the upper lid portion and is circumferential with the refrigerant passage It is provided at an angle that does not coincide with the direction position, and can provide a hermetic compressor with an inexpensive structure and a small oil discharge amount.

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

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a hermetic compressor according to Embodiment 1 of the present invention.

  In FIG. 1, the hermetic compressor includes a motor part 2 in the upper part of the hermetic container 1 and a compression mechanism part 4 driven by the motor part 2 in the lower part, and further lubricates the compression mechanism part 4. Lubricating oil 9 is enclosed.

  The motor unit 2 is composed of a stator 2a that is press-fitted into the upper part of the hermetic container 1 and has several refrigerant passages 3 on the outer periphery thereof, and a rotor 2b that is rotationally driven by the stator 2a, and a rotating shaft 10 is integrally formed with the rotor 2b. Provided. The rotating shaft 10 protrudes downward from the rotor 2 b and extends and is rotatably supported by the main bearing 5 and the sub-bearing 8 of the compression mechanism unit 4. The sub-bearing 8 is provided with a valve device 13 for discharging the refrigerant gas compressed by the compression mechanism unit 4 into the sealed container 1.

  The compression mechanism unit 4 has a cylinder 6, and a piston roller 7 is accommodated in the compression chamber of the cylinder 6. The piston roller 7 is mounted on the crank portion 10 a of the rotary shaft 10, and is eccentrically rotated by the rotation of the rotary shaft 10. And this compression mechanism part 4 is fixedly supported in the airtight container 1 by welding the cylinder 6 to the inner peripheral part of the airtight container 1.

  The sealed container 1 includes a cylindrical container 11 that is sealed on one side and a substantially spherical upper lid portion 12 that covers the cylindrical container 11 by welding all around. A glass terminal 14 is attached to the upper lid portion 12 at a substantially central portion, and a discharge pipe 15 is attached to the spherical portion at an angle that does not coincide with the refrigerant passage 3 at a circumferential position.

  When the compressor is operated with this configuration, the piston roller 7 is eccentrically rotated in the cylinder 6 by the rotation of the rotary shaft 10 by the rotor 2 b, and the refrigerant gas is compressed in the compression mechanism portion 4, and the inside of the sealed container 1 is passed through the valve device 13. To be discharged. At this time, since the lubricating oil 9 leaks into the compression mechanism section 4, the oil droplet-like lubricating oil 9 is mixed with the compressed refrigerant gas and discharged simultaneously. The oil droplet-like lubricating oil 9 passes through the refrigerant passages 3 provided at several locations on the outer periphery of the stator 2a, flows into the upper space of the motor unit 2, and adheres to the inner surface of the upper lid 12 to adhere and separate from the refrigerant gas. Is done. The separated lubricating oil 9 is pushed by the flow of the refrigerant gas along the inner surface of the upper lid portion 12 and moves upward. At this time, since the inner surface of the upper lid portion 12 is formed in a substantially spherical shape, the separated lubricating oil 9 The oil 9 is gradually collected in the center as shown in FIG. The collected lubricating oil 9 collides with a glass terminal 14 provided at substantially the center of the upper lid 12 and then falls to the lower part of the sealed container 1 by its own weight. On the other hand, since the discharge pipe 15 is attached to the spherical surface of the upper lid portion 12 at an angle that does not coincide with the refrigerant passage 3 in the circumferential position, the lubricating oil 9 that flows along the inner surface of the upper lid portion 12 has its opening position. And the lubricating oil 9 does not go out of the compressor.

(Embodiment 2)
FIG. 3 is a longitudinal sectional view of the hermetic compressor according to the second embodiment of the present invention.

In FIG. 3, a compression mechanism section 40 and a motor section 20 for driving the compression mechanism section 40 are arranged vertically in an airtight container 110, and a lubricating oil 9 for lubricating the compression mechanism section 40 is further enclosed.

  The motor unit 20 includes a stator 20a fixed to the inside of the hermetic container 110 by shrink fitting or welding, and a rotor 20b that is rotatably positioned inside the stator 20a. The rotor 20b has a rotating shaft 100. They are connected in a through state. One end of the rotating shaft 100 facing upward is rotatably supported by a main bearing 50 as a fixing member that constitutes a part of the compression mechanism 40. A crank portion 100 a that performs an eccentric motion with respect to the rotary shaft 100 is provided at the tip of the rotary shaft 100 that is supported by the main bearing 50.

  On the other hand, the compression mechanism 40 has several refrigerant passages 31 on the outer peripheral portion, and faces the fixed scroll 17 in which the fixed wrap 16a rises from the fixed end plate 16 and the turning scroll 19 in which the turning wrap 18a rises from the turning end plate 18. A plurality of compression chambers 20 are formed between the two, and the fixed scroll 17 is fixed to the main bearing 50, and the orbiting scroll 19 is sandwiched between them and is backed up by the main bearing 50 via the anti-rotation mechanism 21. doing. A hermetic container 110 of the hermetic compressor includes a cylindrical container 111 that is hermetically sealed, and a substantially spherical upper lid portion 12 that covers the cylindrical container 111 is attached by welding all around. A glass terminal 14 is attached to the upper lid portion 12 at a substantially central portion, and a discharge pipe 15 is attached to the spherical portion at an angle that does not coincide with the refrigerant passage 31 at a circumferential position.

  When the compressor is operated with such a configuration, the rotation of the orbiting scroll 19 is prevented by the rotation preventing mechanism 21, and the orbiting scroll 19 is connected to the orbiting scroll 19 by the rotating shaft 100. Only swivel movement along. As a result, the compression chamber 20 sucks refrigerant gas or the like from the suction port 23 in the peripheral portion and compresses it while moving from the peripheral portion toward the center of the swirl wrap 18a and the fixed wrap 16a while reducing the volume. The compressed refrigerant gas or the like passes through the discharge port 24 in the center and is discharged into the sealed container 1. At this time, since the lubricating oil 9 leaks into the compression mechanism 40, the oil droplet-like lubricating oil 9 is mixed with the compressed refrigerant gas and discharged simultaneously. The refrigerant gas discharged into the hermetic container 110 is cooled through the details of the motor unit 20, and then passes through the refrigerant passages 31 provided at several locations on the outer periphery of the compression mechanism unit 40, so It flows into the space and adheres to and collides with the inner surface of the upper lid 12 and is separated from the refrigerant gas. The separated lubricating oil 9 is pushed by the flow of the refrigerant gas along the inner surface of the upper lid portion 12 and moves upward. At this time, the inner surface of the upper lid portion 12 is separated because it is formed in a substantially spherical shape. The lubricating oil 9 is gradually collected at the center as shown in FIG. The collected lubricating oil 9 collides with the glass terminal 14 provided at the substantially central part of the upper lid part 12 and then falls to the lower part of the sealed container 110 by its own weight. On the other hand, since the discharge pipe 15 is attached to the spherical surface of the upper lid portion 12 at an angle that does not coincide with the refrigerant passage 31 in the circumferential position, the lubricating oil 9 that flows along the inner surface of the upper lid portion 12 has its opening position. And the lubricating oil 9 does not go out of the compressor.

  As described above, since the hermetic compressor according to the present invention can provide a hermetic compressor with an inexpensive structure and a small amount of oil discharge, refrigeration equipment such as an air conditioner and a refrigerator, or a heat pump hot water supply It can be applied to uses such as a container and a dryer.

Sectional drawing of the closed type compressor in Embodiment 1 of this invention The top view which shows the state of the lubricating oil which flows through the inner surface of the upper cover part of Embodiment 1. Sectional drawing of the hermetic compressor in Embodiment 2 of this invention The top view which shows the state of the lubricating oil which flows through the inner surface of the upper cover part of Embodiment 2. Cross section of a conventional hermetic compressor

Explanation of symbols

1 Airtight container 2 Motor part 3 Refrigerant passage
4 Compression Mechanism 9 Lubricating Oil 11 Cylindrical Container 14 Glass Terminal 15 Discharge Pipe

Claims (2)

A hermetic compressor that houses a motor part having a refrigerant passage in the outer peripheral part in the upper part of the hermetic container, and a compression mechanism part and lubricating oil in the lower part, wherein the hermetic container is a sealed cylindrical container Formed from an upper lid part, the upper lid part is provided with a glass terminal for supplying external power to the motor part and a discharge pipe for discharging the gas compressed by the compression mechanism part outside the sealed container, The upper lid portion of the sealed container has a substantially spherical shape, the glass terminal is attached near the center of the upper lid portion, and the discharge pipe is positioned along the spherical surface of the upper lid portion and coincides with the refrigerant passage at a circumferential position. A hermetic compressor characterized in that it is provided at an angle that does not. A hermetic compressor having a compressor mechanism having a refrigerant passage in the outer peripheral part at the upper part in the hermetic container, and a motor part and lubricating oil in the lower part, wherein the hermetic container is a cylindrical container with one sealed Formed from an upper lid part, this upper lid part is provided with a glass terminal for supplying external power to the motor part and a discharge pipe for discharging the gas compressed by the compression mechanism part outside the sealed container, The upper lid portion of the sealed container has a substantially spherical shape, the glass terminal is attached near the center of the upper lid portion, and the discharge pipe is positioned along the spherical surface of the upper lid portion and coincides with the refrigerant passage at a circumferential position. A hermetic compressor characterized in that it is provided at an angle that does not.

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