JP2012021451A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply lubricating oil to a compression mechanism part even when a compressor inclines accompanying inclination of a vehicle.SOLUTION: A scroll compressor includes a motor 5 which is stored in a body casing 3, a compression mechanism part 4 which is driven by the motor 5, and a movable nozzle 18 which is placed in the body casing 3. As a result, lubricating oil can be stably supplied without separating an opening of oil passage 18a from an oil storage surface by deadweight even when the compressor inclines accompanying inclination of a vehicle so that highly reliable compressor can be provided.

Description

  The present invention relates to a compressor applied to an air conditioning and refrigeration apparatus.

  Conventionally, various types of compressors of this type have been published and published by many manufacturers and the like, and various compressors are actually used as compressors for home room air conditioners and refrigerators. It's being used. Recently, it has begun to be used as a compressor for automobile air conditioners.

  Further, in order to supply oil to the compression section of these compressors, for example, as disclosed in Patent Document 1, a method of integrally forming an oil passage in the casing so as to communicate with an oil storage chamber formed in the main body casing Etc. have been proposed (see, for example, Patent Document 1).

  FIG. 5 shows a conventional scroll compressor described in Patent Document 1. In FIG. As shown in FIG. 5, a main body casing 101 includes a compression mechanism portion 102 and a motor 103 that drives the compression mechanism portion 102, and a pump 105 is disposed in the main body casing 101 via an oil passage 104 formed in the main body casing 101. Lubricating oil is sucked from the oil storage section 106 and supplied to the compressor term section 101.

Japanese Patent Laid-Open No. 2006-348289

  However, in the conventional configuration, the main body casing 101 and the oil passage 104 are integrally formed. Therefore, when the compressor is inclined with the inclination of the vehicle, the opening of the oil passage 104 is also inclined as shown in FIG. As a result, the oil is separated from the oil storage surface, and it is difficult to supply the oil to the pump 105. In some cases, the reliability is impaired.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a highly reliable compressor that can stably supply oil even when the compressor is inclined as the vehicle is inclined. .

  In order to solve the above-described conventional problems, a compressor according to the present invention includes a motor, a compression mechanism driven by the motor, a motor and a rear part of the compressor, and a liquid storage part for storing lubricating oil. A main body casing, a pump that sucks the lubricating oil in the liquid storage part and supplies the compressed oil to the compression mechanism part, and a nozzle that communicates with the pump and whose suction opening is located in the lubricating oil in the liquid storage part. And the nozzle is configured to be movable with respect to the pump.

  As a result, even when the compressor is tilted as the vehicle is tilted, the suction opening of the oil passage nozzle can stably supply oil without leaving the oil storage surface by its own weight, thereby providing a highly reliable compressor. be able to.

According to the compressor of the present invention, even when the compressor is tilted as the vehicle is tilted, the suction opening of the oil passage nozzle can stably supply oil without leaving the oil storage surface by its own weight, and is highly reliable. Machine can be provided.

Sectional drawing of the scroll compressor in Embodiment 1 of this invention The longitudinal cross-sectional view of the nozzle part of the scroll compressor in Embodiment 1 The longitudinal cross-sectional view of a nozzle part when the scroll compressor in the same Embodiment 1 inclines The longitudinal cross-sectional view of the nozzle part of the scroll compressor in Embodiment 2 Cross-sectional view of a conventional scroll compressor Longitudinal sectional view of the nozzle when the conventional scroll compressor is tilted

  A first invention includes a motor, a compression mechanism section driven by the motor, a main body casing having a liquid storage section for storing lubricating oil while incorporating the motor and a rear section of the compressor, and a lubricating oil for the liquid storage section. A pump that sucks and supplies the pressure to the compression mechanism section, and a nozzle that communicates with the pump and has a suction opening located in the lubricating oil of the liquid storage section, the nozzle being movable with respect to the pump Even if the compressor is tilted as the vehicle is tilted, the oil passage nozzle opening can stably supply oil without leaving the oil storage surface due to its own weight. Can be provided.

  The second invention has a configuration in which the nozzle is rotatably attached to the outer peripheral portion of the protruding nozzle holding portion formed on the member constituting the pump, and the same effect as the first invention can be obtained.

  In the third aspect of the present invention, the nozzle is configured by providing a weight at the tip suction opening portion of the flexible pipe, and oil can be stably supplied regardless of the direction of the inclination of the compressor. Can provide a highly reliable compressor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
In the present embodiment, a scroll compressor will be described as an example. 1 is a cross-sectional view of a scroll compressor according to Embodiment 1 of the present invention, FIG. 2 is a vertical cross-sectional view of a nozzle portion of the scroll compressor, and FIG. 3 is a vertical cross-section of the nozzle portion when the scroll compressor is tilted. FIG.

  FIG. 1 shows an example of a horizontal scroll compressor installed sideways by a mounting leg 2 around the body of the scroll compressor 1. The scroll compressor 1 includes a compression mechanism section 4 and a motor 5 for driving the compression mechanism section 4 in the main body casing 3, and a liquid storage section 6 for storing liquid for lubrication of each sliding section including the compression mechanism section 4. The motor 5 is driven by a motor drive circuit unit (not shown).

  The motor 5 includes a stator 5 a fixed in the main body casing 3 and a rotor 5 b that rotates together with the drive shaft 14.

  The refrigerant to be handled is a gas refrigerant, and a liquid such as a lubricating oil 7 is employed as a liquid to be used for lubrication of each sliding part and a seal of the sliding part of the compression mechanism part 4. The lubricating oil 7 is compatible with the refrigerant. However, in this invention, if it is lubricating oil, it will not be restricted to these.

In this embodiment, a scroll compressor is described. Basically, a compression mechanism unit 4 that sucks, compresses and discharges refrigerant, a motor 5 that drives the compression mechanism unit 4, and a compression mechanism unit. 4 may be used as long as it is a scroll compressor 1 in which a liquid storage section 6 for storing a liquid to be used for lubrication of each sliding section including 4 is built in the main body casing 3 and the motor 5 is driven by a motor drive circuit section.

  A main bearing member 19 having a pump 13, a sub rolling bearing 21, a motor 5, and a main rolling bearing 22 is arranged from one end wall side in the axial direction in the main body casing 3. The pump 13 is accommodated from the outer surface of the end wall and is held between the lid body 16 and the pump body 17 that is fitted thereafter, and a pump chamber 17 that communicates with the liquid storage section 6 is formed inside the lid body 16 to be formed in the nozzle 18. The liquid reservoir 6 is communicated with the formed oil passage 18a. The nozzle 18 is disposed so as to cover the outer peripheral portion of the protruding nozzle holding portion 16a formed on the lid 16 with a gap, and is movable so as to rotate around the nozzle holding portion 16a.

  The auxiliary rolling bearing 21 is supported by an end wall, and the side connected to the pump 13 of the drive shaft 14 is supported. The motor 5 fixes the stator 5 a to the inner periphery of the main body casing 3, and the drive shaft 14 can be rotationally driven by a rotor 5 b fixed around the middle of the drive shaft 14.

  The main bearing member 19 is fixed to the inner periphery of the sub casing 28 with a bolt (not shown), and the compression mechanism portion 4 side of the drive shaft 14 is supported by the main rolling bearing 22. The fixed scroll 11 is attached to the outer surface of the main bearing member 19 with a bolt or the like (not shown), and the orbiting scroll 12 is sandwiched between the main bearing member 19 and the fixed scroll 11 to constitute a scroll compressor. An Oldham ring 26 is provided between the main bearing member 19 and the orbiting scroll 12 for preventing the orbiting scroll 12 from rotating and causing orbiting motion.

  An eccentric shaft 14a is integrally formed at the end of the drive shaft 14, and a bush 20 is fitted and supported on the eccentric shaft 14a. The orbiting scroll 12 is supported on the bush 20 via an eccentric rolling bearing 23 so that the orbiting scroll 12 faces the fixed scroll 11. An eccentric rolling bearing 23 is accommodated on the back surface of the orbiting scroll 12.

  The orbiting scroll 12 is formed by erecting a spiral wrap on an end plate having a cylindrical boss portion that accommodates the eccentric rolling bearing 23. The fixed scroll 11 is combined with the orbiting scroll 12 and is formed with a spiral wrap upright on the end plate.

  The exposed portion of the compression mechanism 4 from the sub casing 28 is covered with the main casing 3 which is fixed with bolts (not shown) while the sub casing 28 and the openings are brought into contact with each other. The compression mechanism unit 4 is located between the suction port 8 of the sub casing 28 and the discharge port 9 of the main casing 3, and its own suction port (not shown) is connected to the suction port 8 of the sub casing 28. Opens a discharge gas (not shown) to the discharge chamber 25 through the reed valve 24a. The discharge chamber 25 is on the side of the motor 5 having the discharge port 9 between the compression mechanism portion 4 and the end wall through the fixed scroll 11 and the main bearing member 19 or a communication passage 27 formed between them and the main body casing 3. Leads to.

  About the scroll compressor 1 comprised as mentioned above, the operation | movement and an effect | action are demonstrated.

  The motor 5 is driven by a motor drive circuit unit, and rotates the compression mechanism unit 4 via the drive shaft 14 and drives the pump 13. In the compression mechanism section 4 of the scroll compressor 1, the compression space 10 formed by meshing the fixed scroll 11 and the orbiting scroll 12 causes the orbiting scroll 12 to orbit the stationary scroll 11 via the drive shaft 14 by the motor 5. The suction port 8 provided in the sub-casing 28 and the discharge port provided in the main body casing 3 perform suction, compression, and discharge to the external cycle of the refrigerant returning from the external cycle by changing the volume with movement. 9 through.

  At the same time, the lubricating oil 7 stored in the liquid storage section 6 of the main body casing 3 drives the pump 13 or the like with the driving shaft 14 or uses the differential pressure in the main body casing 3, so that the driving shaft 14 Is supplied to the rear surface of the orbiting scroll 12 as the orbiting scroll 12 is driven to rotate through the drive shaft oil supply path 15.

  At this time, the compression mechanism section 4 is supplied with the lubricating oil 7 of the liquid storage section 6 by the pump 13 and receives the lubrication and sealing action, while passing through the suction port 8 of the sub casing 28 and the suction port provided in its fixed scroll 11. The return refrigerant from the refrigeration cycle is sucked and compressed, and discharged from its discharge port 24 to the discharge chamber 25. The refrigerant discharged into the discharge chamber 25 enters the motor 5 side through the communication passage 27, and in the process until it is discharged from the discharge port 9 of the main body casing 3 while cooling the motor 5, the refrigerant transmits collision and throttle vibration. It is possible to provide a scroll compressor that is suppressed and low noise.

  Here, the scroll compressor according to the present embodiment can be stably supplied even when the main casing 3 is inclined about the axis. That is, FIG. 3 shows the state of the nozzle portion when the scroll compressor is tilted. When the compressor is tilted with the tilt of the vehicle, the nozzle 18 rotates due to its own weight, and the suction opening of the oil passage 18a becomes the oil storage surface. You will never leave. Therefore, oil can be supplied stably and a highly reliable compressor can be provided.

(Embodiment 2)
FIG. 4 shows another example of the nozzle 18. This nozzle 18 is configured by providing a weight 18b at the tip of a light and thin flexible pipe, that is, a suction opening portion, and press-fitted into the outer peripheral portion of the nozzle holding portion 16a. It is fixed by.

  Since the nozzle 18 is provided with a weight 18b at the tip suction opening, when the compressor is tilted with the inclination of the vehicle, the nozzle 18 itself is deformed in the vertical direction due to the weight of the weight 18b, and the oil passage 18a is sucked. The opening will not leave the oil storage surface. Therefore, in the case of this nozzle 18, there exists an advantage which can respond even if a compressor inclines in any direction.

  As described above, the compressor according to the present invention can stably supply oil without leaving the oil storage surface due to its own weight, even when the compressor is tilted as the vehicle is tilted. Since the compressor with high performance can be provided, the working fluid is not limited to the refrigerant, and can be applied to a scroll fluid machine such as an air scroll compressor, a vacuum pump, and a scroll type expander.

DESCRIPTION OF SYMBOLS 1 Scroll compressor 3 Main body casing 4 Compression mechanism part 5 Motor 5a Stator 5b Rotor 6 Liquid storage part 7 Lubricating oil 8 Suction port 9 Discharge port 10 Compression space 11 Fixed scroll 12 Orbiting scroll 13 Pump 14 Drive shaft 15 Drive shaft oil supply path 16 Lid 16a Lid nozzle holder 17 Pump chamber 18 Nozzle 18a Oil passage

Claims (3)

A motor, a compression mechanism driven by the motor, a main body casing having a built-in motor and a rear part of the compressor and a reservoir for storing lubricating oil, and the compression by sucking the lubricating oil in the reservoir A compressor provided with a pump for supplying to the mechanism part and a nozzle that communicates with the pump and whose suction opening is located in the lubricating oil of the liquid storage part, and the nozzle is provided movably with respect to the pump. 2. The compressor according to claim 1, wherein the nozzle is rotatably attached to an outer peripheral portion of a protruding nozzle holding portion formed on a member constituting the pump. The compressor according to claim 1, wherein the nozzle is configured by providing a weight at a suction opening portion at a tip of a flexible pipe.