JP6023977B2 - Compressor and vehicle air conditioner equipped with compressor - Google Patents

Description

  The present invention relates to a compressor that houses a compression mechanism that sucks, compresses and discharges a gas refrigerant and a motor that drives the compression mechanism in a sealed container, and that drives the motor by a motor drive circuit. In particular, it is suitable for a horizontal type air-conditioning compressor for electric vehicles and hybrid vehicles.

  In general, a compressor used in a refrigeration cycle is filled with refrigeration oil to ensure the reliability of the sliding portion. Since the refrigeration oil and the discharge gas refrigerant are mixed with each other, the refrigeration oil and the discharge gas refrigerant are efficiently separated in the compressor so that the refrigeration oil is not sent to the refrigeration cycle together with the discharge gas refrigerant. Various methods for stably supplying the sliding portion have been devised (for example, see Patent Document 1).

  In the compressor disclosed in Patent Document 1, the discharge space portion provided with the discharge pipe and the portion for housing the motor are partitioned by a partition member having openings at the upper and lower portions, and the oil level of the portion for housing the motor The refrigeration oil is agitated by the rotor of the motor and prevented from being discharged together with the refrigerant gas.

Japanese Patent No. 3124335

  However, in the conventional configuration, a large amount of refrigerating machine oil is sealed up to the vicinity of the lower end of the rotor. However, this causes too much refrigerating machine oil to be discharged into the refrigerating cycle, resulting in the refrigerating capacity of the air conditioner and the efficiency of the refrigerating cycle. Will lower.

  In order to solve this problem, it is a general technique to reduce the amount of the refrigerating machine oil filled to the extent that reliability is not impaired. However, if this is done, the oil level on the closed container side will be lower than the notch of the support plate. In such a state, the discharge gas refrigerant passes between the support plate and the separation plate and winds up the refrigerating machine oil accumulated in the lower part, increasing the amount of refrigerating machine oil discharged from the discharge pipe into the refrigerating cycle, Refrigerating machine oil with a lot of gas components because the oil level in the vicinity of the oil supply pipe section is lowered and the refrigerant gas flowing into the refrigerating machine oil accumulated in the lower part is mixed with a lot of discharged gas refrigerant. Will be supplied to the compression mechanism through the oil supply pipe, which has the problem that the lubricity deteriorates and the reliability of the compressor is lowered.

  In addition, when the conventional compressor is mounted on the vehicle, the vehicle travels on a slope, so the mounting posture of the compressor is always tilted up and down, left and right, and the liquid level of the refrigerating machine oil accumulated at the bottom of the compressor is also Tilt up, down, left and right in conjunction with the movement.

  For example, in the case of the compressor of Patent Document 1, when the compression mechanism portion side is inclined downward and the discharge space portion side is inclined upward, the refrigerating machine oil is biased toward the compression mechanism portion side, and the refrigerating machine oil does not collect in the vicinity of the oil supply pipe. It becomes a state. In such a state, the refrigerating machine oil is not sucked from the oil supply pipe, the refrigerating machine oil is not supplied to the compression mechanism part, and there is a problem that durability is impaired such as a problem that the compression mechanism part is seized. It was. Furthermore, since it is composed of two plates, a support plate and a separation plate, in order to store the refrigerating machine oil, there is a problem that the number of members increases and the cost increases.

  The present invention solves such a conventional problem, and maintains a stable lubrication state without interrupting the oil supply to the compression mechanism even when the attitude of the compressor is tilted up, down, left and right. Objective.

  In order to solve the above-described conventional problems, the present invention includes a comp case that houses a motor and a compression mechanism, a rear case that has a discharge port that sends out a discharge gas refrigerant compressed by the compression mechanism to a refrigeration cycle, A space formed between the partition plate and the rear case, the partition plate partitioning between the comp case and the rear case; and a partition plate partitioning the space in the rear case. A compressor chamber that supplies a refrigerating machine oil in the oil storage chamber to the compression mechanism portion from an oil supply port provided in the oil storage chamber, the discharge chamber being disposed in the rear case. A partition wall for partitioning the oil storage chamber is provided, and a gas communication hole for communicating the space inside the comp case and the discharge chamber is provided at an upper portion of the partition plate, and a lower portion of the partition plate It has a configuration provided with an oil communication hole for communicating the lubricant storage chamber and the compressor casing inner space.

  As a result, the main flow of the discharge gas refrigerant flows from the upper part of the motor to the discharge chamber through the gas communication hole in the upper part of the partition plate, while the refrigerating machine oil accumulated in the lower part of the compressor case is pushed by the dynamic pressure of the discharge gas refrigerant. Since the oil flows into the oil storage chamber from the communication hole and the oil storage chamber is separated from the other space by the partition wall, the refrigeration oil is difficult to get out of the oil storage chamber and accumulates in the oil storage chamber as it is, and the oil level of the oil storage chamber Becomes higher than the oil level accumulated in the lower part of the compressor case, and even with a small amount of refrigerating machine oil, it can be maintained higher than the oil supply port. Therefore, refrigeration oil can be stably supplied from the oil supply port to the compression mechanism unit, and the reliability of the compressor can be improved.

  The present invention improves the reliability of the compressor because the supply of refrigeration oil to the compression mechanism is not interrupted and the stable lubrication state is maintained even when the attitude of the compressor is tilted up, down, left and right due to the vehicle traveling on a slope. can do.

Sectional drawing of the compressor in Embodiment 1 of this invention AA arrow sectional view of FIG. The graph which shows the oil level of the compressor in Embodiment 1 of this invention and a conventional product Sectional drawing of the compressor in Embodiment 2 of this invention AA arrow sectional view of FIG. The graph which shows the oil level of the compressor in Embodiment 2 of this invention, and a conventional product Sectional drawing of the compressor in Embodiment 3 of this invention AA arrow sectional view of FIG. Sectional drawing of the compressor in Embodiment 4 of this invention Sectional drawing of the compressor in Embodiment 5 of this invention The schematic diagram of the vehicle which shows Embodiment 6 of this invention and mounts a compressor Sectional drawing of a compressor when the compressor in Embodiment 6 of the present invention is inclined The graph which shows the oil level of the compressor in Embodiment 6 of this invention, and a conventional product Cross-sectional view of a compressor in a comparative conventional product for comparison with an embodiment product of the present invention 14 is a cross-sectional view of the compressor when the compressor is tilted in the comparative conventional product of FIG.

A first aspect of the present invention is a comp case that houses a motor and a compression mechanism, a rear case that has a discharge port that delivers a discharge gas refrigerant compressed by the compression mechanism to the refrigeration cycle, and the comp case and the rear case. A partition plate for partitioning between the compressor, the upper portion between the partition plate and the rear case is a discharge chamber, the lower portion is an oil storage chamber, and the compressor mechanism is configured to supply the refrigerating machine oil in the oil storage chamber from an oil supply port opened in the oil storage chamber. The compressor is supplied to a section, provided with a partition wall for partitioning and separating them between the discharge chamber and the oil storage chamber, and a gas communication hole communicating with the discharge chamber at an upper portion of the partition plate at a lower portion. Is configured to have an oil communication hole communicating with the oil storage chamber.

  As a result, the main flow of the discharge gas refrigerant flows from the upper part of the motor to the discharge chamber through the gas communication hole in the upper part of the partition plate, and the refrigerating machine oil accumulated in the lower part of the compressor case is pushed by the dynamic pressure of the discharge gas refrigerant and stored in the oil storage chamber. Since the oil storage chamber is separated from the other spaces by the partition wall, the refrigeration oil is difficult to get out of the oil storage chamber and accumulates in the oil storage chamber as it is. It can be maintained higher than the oil level accumulated in the tank. Therefore, even if the amount of the refrigerating machine oil is reduced, the refrigerating machine oil can be stably supplied from the oil supply port to the compression mechanism unit, and the reliability of the compressor can be improved. Further, as compared with the conventional example, the configuration for storing the refrigerating machine oil is only one partition plate, and if the partition wall is formed integrally with the rear case, the configuration is simplified and the cost can be reduced.

  The second aspect of the invention is particularly configured such that the upper part of the opening of the oil communication hole of the first aspect of the invention is provided at a position higher than the oil filler opening and provided at a position lower than the lower end of the stator and insulator of the motor. Even if the discharge gas refrigerant is discharged from the gap between the rotor and stator of the motor or the gap between the windings in the stator, the discharge gas refrigerant does not flow directly into the oil passage, so that the refrigerating machine oil with a small amount of gas refrigerant component enters the oil storage chamber. As a result, the refrigerating machine oil with a small amount of gas refrigerant component can be supplied to the compression mechanism unit, the lubricity of the compression mechanism unit can be improved, and the reliability of the compressor can be improved.

  In the third invention, the gas communication hole of the first or second invention is composed of a plurality of holes, at least one of which is provided in the upper vicinity of the partition wall, and the refrigerating machine oil separated from the discharge gas refrigerant is provided. Even if it collects in the upper part of the partition wall, it returns to the inside of the comp case through the gas communication hole in the upper part of the vicinity of the partition wall. Therefore, it is possible to further reduce the refrigerating machine oil that the discharge gas refrigerant winds up the refrigerating machine oil in the discharge chamber and discharges it from the discharge port together with the discharge gas refrigerant into the refrigerating cycle, thereby improving the refrigerating capacity and efficiency of the refrigerating cycle. I can do it.

  In a fourth aspect of the invention, particularly in the first to third aspects of the invention, the lower end of the oil storage chamber and the oil supply port are configured to be lower than the lower end of the oil communication hole, and the refrigeration required for the oil level at the lower end of the oil supply port. The amount of machine oil can be reduced. Therefore, even if the amount of refrigeration oil that leaks back to the compressor due to leakage of refrigeration oil in the market can be reliably supplied to the compression mechanism compared to the conventional case, the durability of the compressor can be improved.

  In the fifth invention, in particular, in the fourth invention, an angle θ connecting the lower end of the oil supply port and the lower end of the oil communication hole is configured to be 45 degrees or more from a horizontal line, and the vehicle is suddenly added. Since the refrigerating machine oil remains without jumping out of the oil storage chamber even when decelerating or turning, the refrigerating machine oil can continue to be supplied from the oil supply port to the compression mechanism, and the sliding part can be kept lubricated. The durability can be improved more reliably.

A sixth aspect of the invention is a vehicle air conditioner that is configured by mounting the compressor of any one of the first to fifth aspects of the invention on a vehicle. Below, even when the rear case side is tilted upward, the refrigerating machine oil accumulated in the lower part of the compressor case is pushed by the dynamic pressure of the discharge gas refrigerant and flows into the oil storage chamber, and the oil storage chamber is partitioned by the partition wall, and Since the oil passage is lower than the lower end of the stator insulator and the area of the oil communication hole is small, the refrigerating machine oil that is pushed by the dynamic pressure of the discharge gas refrigerant and flows into the oil storage chamber is difficult to escape from the oil storage chamber and is easy to accumulate. The oil level can be maintained above the filler opening. Therefore, the oil supply to the compression mechanism is not interrupted, and a stable lubrication state can be maintained and the reliability of the compressor can be further improved.

  In the case of using the compressors of the fourth and fifth inventions, since the refrigeration oil remains without jumping out of the oil storage chamber even when the vehicle is suddenly accelerated or decelerated or turned, The refrigeration oil can be continuously supplied to the sliding section, the lubrication of the sliding portion can be maintained, and the durability of the compressor can be further improved.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. Note that the present invention is not limited to the embodiments.
(Embodiment 1)
FIG. 1 is a sectional view of a compressor in the first embodiment of the present invention. The compressor 1 shown in FIG. 1 is configured to be installed sideways by a mounting leg 2 around its body, and is compressed in a hermetic container by a motor 3 and a drive shaft 4 from the motor 3. The mechanism unit 5 is accommodated, and the drive shaft 4 is installed so as to be substantially horizontal. The hermetic container includes a comp case 6 that houses the motor 3 and the compression mechanism unit 5, and a rear case 8 that has a discharge port 7 that sends out the compressed discharge gas refrigerant to the refrigeration cycle. It is made to drive by the motor drive circuit unit 50 in the attached inverter case 13.

  The fluid to be handled is a gas refrigerant, and the refrigerating machine oil is compatible with the refrigerant. However, the present invention is not limited to these. Basically, the compressor mechanism 5 that sucks, compresses and discharges the gas refrigerant, the motor 3 that drives the compressor mechanism 5, and the refrigerating machine oil that is used for lubrication of each sliding portion including the compressor mechanism 5 is provided. Any horizontal compressor that includes the oil storage chamber 9 to be stored and the discharge port 7 and that drives the motor 3 by the motor drive circuit unit 50 may be used, and the following description does not limit the description of the scope of claims.

  The compression mechanism unit 5 of the horizontal compressor 1 according to the present embodiment is of a scroll type as one example, and the fixed space 10 and the orbiting scroll 11 are engaged with each other as shown in FIG. When the orbiting scroll 11 is reciprocated with respect to the fixed scroll 10 by the motor 3 via the drive shaft 4, the compression space 12 is returned from the external cycle by changing the volume with movement. Refrigerant suction, compression and discharge to external cycle. The refrigerant is sucked, compressed, and discharged to the external cycle through the suction port 14 provided in the inverter case 13 and the discharge port 7 provided in the rear case 8. The rear case 8 has a discharge chamber 15 at the top and an oil storage chamber 9 at the bottom. In the oil storage chamber 9, an oil supply port 16 from the oil supply passage 18 of the pump case 17 is opened, and the positive displacement pump 20 in the pump chamber 19 is driven by the drive shaft 4 or in the compcase 6. Suction is performed by using differential pressure. The sucked refrigerating machine oil is supplied to the compression mechanism 5 through the oil supply passage 21 in the drive shaft 4.

The rear case 8 and the comp case 6 are partitioned by a partition plate 22, and the partition plate 22 and the rear case 8 are partitioned by a partition wall 8 a to partition the discharge chamber 15 and the oil storage chamber 9. It is. As shown in FIG. 2, a plurality of gas communication holes 23 are formed in the upper part of the partition plate 22, and a discharge gas refrigerant (indicated by a white arrow) from the compression mechanism unit 5 passes through the gas communication holes 23 and is discharged into the discharge chamber. 15 flows into. The discharged gas refrigerant from the compression mechanism 5 separates the refrigerating machine oil by colliding with the motor 3 in the comp case 6 and the wall of the rear case 8. Further, an oil communication hole 24 is provided at the lower end of the partition plate 22, and the refrigerating machine oil accumulated in the lower part of the comp case 6 is pushed by the dynamic pressure of the discharge gas refrigerant through the oil communication hole 24 from the lower part of the comp case 6. As a result, the oil level flows into the oil storage chamber 9 and the oil level is maintained higher than the oil supply port 16. Accordingly, the refrigerating machine oil can be stably sucked from the oil supply port 16 even if the refrigerating machine oil is reduced.

  On the other hand, the refrigerating machine oil supplied to the compression mechanism 5 through the oil supply passage 21 of the drive shaft 4 is supplied to the liquid reservoir 25 on the back surface of the orbiting scroll 11 as the orbiting scroll 11 is driven to orbit. A part of the refrigerating machine oil supplied to the liquid reservoir 25 is supplied to the back pressure chamber 26 opposite to the lap on the outer peripheral portion of the orbiting scroll 11 through the orbiting scroll end plate 11a to a predetermined restriction base such as a throttle 27 and fixed. The back pressure introduced here is adjusted to a predetermined amount by a valve device (not shown) provided in the scroll 10, and the orbiting scroll 11 is pressed and backed up.

  Further, the refrigerating machine oil acts as a seal and a lubricant between the fixed scroll 10 and the orbiting scroll 11 through the orbiting scroll 11. Further, another part of the refrigerating machine oil supplied to the liquid reservoir 25 lubricates the bearings 28 and 29 through the eccentric bearing 28 and the main bearing 29, and then flows out to the motor 3 side to the oil storage chamber 9. Collected.

  The positive displacement pump 20 of this compressor is held between the partition plate 22 and the pump case 17, and the auxiliary bearing 30 that supports the drive shaft is supported by the partition plate 22. In addition, a pump chamber 19 communicating with the oil storage chamber 9 is formed inside the pump case 17 so as to communicate with the oil storage chamber 9 via the oil supply passage 18. Further, the motor 3 fixes the stator 3a by shrink fitting on the inner periphery of the comp case 6 so that the drive shaft 4 can be rotationally driven by the rotor 3b fixed around the middle of the drive shaft 4. The main bearing portion 31 holds a main bearing 29, and the main bearing 29 supports the compression mechanism portion 5 side of the drive shaft 4.

  The fixed scroll 10 is attached to the main bearing portion 31 with a bolt or the like (not shown) and the orbiting scroll 11 is sandwiched between the main bearing portion 31 and the fixed scroll 10 to constitute the compression mechanism portion 5. An Oldham ring 32 is provided between the main bearing portion 31 and the orbiting scroll 11 to prevent the orbiting scroll 11 from rotating and to orbit. An eccentric shaft 4a is integrally formed on the end surface of the drive shaft 4, and a bush 33 is fitted and supported on the eccentric shaft 4a.

  The orbiting scroll 11 is supported by the bush 33 through the eccentric bearing 28 so that the orbiting scroll 11 faces the fixed scroll 10. A cylindrical portion 11b projects from the rear surface of the orbiting scroll end plate 11a of the orbiting scroll 11, and the eccentric bearing 28 is accommodated in the cylindrical portion 11b. The inner ring of the eccentric bearing 28 is fitted to the bush 33, and the outer ring of the eccentric bearing 28 is fitted to the cylindrical portion 11b.

  The outer surface of the compression mechanism 5 is covered with an inverter case 13, and the inverter case 13 is fixed to the comp case 6 with bolts, thereby forming an end wall 13a opposite to the rear case 8 in the axial direction. The compression mechanism unit 5 is located between the suction port 14 of the inverter case 13 and the discharge port 7 of the rear case 8, and a suction hole of the compression mechanism unit 5 (not shown) is connected to the suction port 14 of the inverter case 13, A discharge hole 34 of the compression mechanism 5 is opened to the discharge chamber lid 36 via a reed valve 35, and a discharge valve chamber 37 is formed between them. The discharge valve chamber 37 communicates with the motor 3 side between the compression mechanism portion 5 and the partition plate 22 through a communication passage 38 formed in the fixed scroll 10 and the main bearing portion 31. The communication passage 38 is provided below the rotation center of the motor 3 due to structural restrictions such as the suction port 14 and the reed valve 35.

  The lead wire 3 c of the motor 3 is connected to a sealing terminal (not shown) penetrating the inverter case 13, and the sealing terminal is connected to the motor drive circuit 50.

In the compressor configured as described above, the motor 3 is driven by the motor drive circuit unit 50 to rotate the compression mechanism unit 5 through the drive shaft 4 and to drive the positive displacement pump 20. At this time, the compression mechanism unit 5 is supplied with the refrigerating machine oil in the oil storage chamber 9 by the positive displacement pump 20 and is provided with the suction port 14 of the inverter case 13 and the fixed scroll 10 of the compression mechanism unit 5 while receiving lubrication, sealing, and pressing action. The return refrigerant from the refrigeration cycle is sucked through the suction port (not shown), compressed, and discharged from the discharge hole 34 of the compression mechanism 5 to the discharge valve chamber 37. The refrigerant discharged into the discharge valve chamber 37 enters the motor 3 through the communication passage 38, and is discharged from the discharge port 7 through the gas communication hole 23 of the partition plate 22 through the discharge chamber 15 of the rear case 8 while cooling the motor 3. In the process up to this point, the refrigerant separates the refrigerating machine oil by performing gas-liquid separation such as collision and throttling, and the auxiliary bearing 30 is also lubricated by the accompanying partial refrigerating machine oil.

  Here, the compressor according to the present embodiment is provided with a partition wall 8a in the rear case 8 as shown in FIG. The discharge chamber 15 and the oil storage chamber 9 are separated by 8a. A gas communication hole 23 through which discharge gas refrigerant flows into the discharge chamber 15 is provided at the upper part of the partition plate 22, and an oil communication hole 24 through which refrigeration oil flows into the oil storage chamber 9 is provided at the lower end of the partition plate 22. Specifically, the partition plate 22 has a diameter of 112 mm, the gas communication hole 23 has a diameter of 10 mm, and is formed at three locations on the partition plate. The oil communication hole 24 is a hole having a height of 22 mm and a width of 30 mm.

  With the above configuration, the main flow of the discharge gas refrigerant passes from the upper part of the motor 3 through the gas communication hole 23 in the upper part of the partition plate 22, and the refrigerating machine oil accumulated in the lower part of the compressor case 6 is pushed by the dynamic pressure of the discharge gas refrigerant to store oil. Since the oil storage chamber 9 flows into the chamber 9 and the oil storage chamber 9 is separated from the other space by the partition wall 8a, the refrigeration oil hardly comes out of the oil storage chamber 9 and accumulates in the oil storage chamber 9 as it is. The oil level in the chamber 9 can be maintained higher than the oil level accumulated in the lower part of the comp case 6. Therefore, even if the compressor is slightly inclined in the front-rear direction, the refrigeration oil can be stably supplied from the oil supply port 16 to the compression mechanism unit 5 and the reliability of the compressor can be improved.

  Next, this will be described with reference to the graph showing the oil level characteristic in FIG. First, for comparison with the present invention, the configuration of a compressor manufactured by the prior art without the basic configuration of the present invention will be described with reference to FIGS. In addition, the same number is attached | subjected to the same part as this embodiment product, and description is abbreviate | omitted.

  Of course, this comparative conventional product has no partition wall, the upper and lower parts of the rear case communicate with each other, the gas communication hole at the upper part of the partition plate 22 has three holes with a diameter of 10 mm, and the oil communication hole at the lower part of the partition plate has a height of 22 mm. The hole has a width of 30 mm.

  In FIG. 3, the product of this embodiment is indicated by a solid line with a black circle (●), and the comparative conventional product is indicated by a broken line with a diamond (♦). For the oil level H, the height of the oil level is measured visually by attaching a sight glass to the lower end of the oil storage chamber of the rear case for both the present embodiment product and the comparative conventional product. The amount of refrigerating machine oil is an oil level of 20 mm and an enclosed amount of 150 g (100%). The oil filler port 16 is opened at a height of 2 mm from the bottom of the oil storage chamber.

As a result of the experiment, the comparative conventional product pushes the refrigerating machine oil accumulated in the lower part of the compressor case 6 into the lower part of the rear case 8 due to the dynamic pressure of the discharge gas refrigerant, but the gap between the rotor 3b of the motor 3 and the stator 3a and the stator 3a Since the discharge gas refrigerant is discharged from the gap between the windings, the discharge gas refrigerant flows directly into the oil communication hole 24, blows up from the lower part of the rear case 8 to the upper part of the rear case 8, and is discharged from the discharge port 7. The refrigerating machine oil that has been pushed into the lower part of the rear case 8 is also rolled up together with the discharge gas refrigerant, and the amount of refrigerating machine oil that accumulates in the lower part of the rear case 8 decreases as the operation speed increases. Therefore, the oil level H of the compressor is considerably lowered when the compressor rotates at a high speed, as indicated by the broken diamond (♦). At a high rotational speed of 8300 r / min, the oil level H is 2 mm, which is almost the same level as the oil supply port 16 and a mist-like lubricating oil state occurs. Therefore, the refrigerating machine oil supplied from the fuel filler port 16 to the compression mechanism unit 5 contains a considerable amount of gas components, and the lubrication state of the compression mechanism unit is lowered.

  On the other hand, in this embodiment product indicated by the solid line of black circles (●), the oil level H can be maintained higher than that of the comparative conventional product in the region of 3000 r / min or more. In particular, at a high-speed rotation of 8300 r / min, the level of 5 mm, which is considerably higher than that of the filler port, is maintained, and the gas component in the refrigeration oil in the vicinity of the filler port 16 is reduced. Therefore, the refrigerating machine oil supplied from the oil supply port 16 to the compression mechanism unit 5 is in an oil-rich state, the lubrication state of the compression mechanism unit is good, and the reliability of the compressor can be improved.

Further, as compared with the conventional product, the structure for storing the refrigerating machine oil is only one partition plate 22, and if the partition wall 8a is formed integrally with the rear case 8, the structure becomes simple and the cost can be reduced.
(Embodiment 2)
4 and 5 are views showing a second embodiment of the present invention. In this embodiment, the upper part of the opening of the oil communication hole 24 is provided at a position higher than the oil filler opening 16 and at a position lower than the lower end of the stator / insulator 39 of the motor. Specifically, the diameter of the oil communication hole 24 is 5 mm, and the height of the opening is also 5 mm from the lower end of the comp case 6. That is, it is provided at a position that is higher than the height 2 mm of the fuel filler opening 16 and lower than 10 mm at the lower end of the stator insulator 39.

  About the compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. Even if the discharged gas refrigerant is discharged from the gap between the stator 3a and the rotor 3b of the motor 3 or the gap between the windings in the stator 3a, the discharged gas refrigerant collides with the partition plate 22 and directly enters the oil communication hole 24. Since it does not flow in, the refrigerating machine oil with a small gas refrigerant component accumulates in the oil storage chamber 9. Further, since the area of the oil communication hole 24 is small, the refrigerating machine oil that has been pushed by the dynamic pressure of the discharge gas refrigerant and has flowed into the oil storage chamber 9 is difficult to escape from the oil storage chamber 9 and easily accumulates. It can be maintained higher than in the first embodiment.

  This will be described with reference to the graph showing the characteristics of the oil level in FIG. The solid line of the black circle (●) represents the oil level characteristic of the first embodiment, the oil level H is 10 mm at a low speed rotation of 800 r / min, and 5 mm at a high speed rotation of 8300 r / min. On the other hand, the squares show the oil level characteristics of the second embodiment. The oil level is high at 13 mm at a low speed of 800 r / min and 7 mm at a high speed of 8300 r / min.

Therefore, the refrigerating machine oil having a smaller gas refrigerant component can be supplied from the oil supply port 16 to the compression mechanism unit 5, improving the lubricity of the compression mechanism unit 5 and improving the reliability of the compressor.
(Embodiment 3)
7 and 8 are views showing a third embodiment of the present invention. In this embodiment, the gas communication hole 23 is composed of a plurality of holes, at least one of which is provided in the vicinity of the partition wall 8a. In particular. The diameter of the gas communication hole is 10 mm, and three are provided above the partition plate 22 and two are provided near the partition wall 8a.

  With the above configuration, even if the refrigerating machine oil separated from the discharge gas refrigerant accumulates in the upper part of the partition wall 8a, the refrigerating machine oil returns to the inside of the comp case 6 through the gas communication hole 23 near the upper part of the partition wall 8a. 15 It is difficult to collect at the lower end. Therefore, it is possible to more reliably reduce the refrigerating machine oil that the discharged gas refrigerant winds up the refrigerating machine oil in the discharge chamber 15 and is discharged from the discharge port 7 together with the discharged gas refrigerant into the refrigerating cycle. Can be improved.

(Embodiment 4)
FIG. 9 is a diagram showing a fourth embodiment of the present invention. In this embodiment, the lower end 9 a and the oil supply port 16 of the oil storage chamber 9 are configured to be lower than the lower end of the oil communication hole 24. Specifically, the oil supply port 16 is provided 5 mm lower than the lower end of the oil communication hole 24.

With the above configuration, in the conventional configuration, about 20 cm ^{3 was} necessary for the oil filler port 16 to be immersed in the refrigerating machine oil and to be able to supply oil to the compression unit, but in the example of this embodiment, about 2 cm ³ is required. Since refrigeration oil is sufficient, even if the amount of refrigeration oil leaking in the market and returning to the compressor is reduced, the oil can be supplied more reliably than in the conventional configuration, and the durability of the compressor can be improved.

(Embodiment 5)
FIG. 10 is a diagram showing a fifth embodiment of the present invention. In this embodiment, the angle θ connecting the lower end of the oil supply port 16 and the lower end of the oil communication hole 24 is configured to be 45 degrees or more from the horizontal line. When the vehicle is subjected to inertial force or centrifugal force during sudden acceleration / deceleration or turning, the refrigeration oil accumulated in the oil storage chamber 9 pops out of the oil storage chamber 9, but according to experiments, it does not pop out if it is tilted at least 30 degrees or more, preferably 45 degrees or more. I was able to confirm. Therefore, in this embodiment, the oil supply port 16 is provided 10 mm lower than the lower end of the oil communication hole 24, and the angle θ connecting the lower end of the oil supply port 16 and the lower end of the oil communication hole 24 is 46 degrees from the horizontal line.

  With the above configuration, even if the vehicle suddenly accelerates or decelerates or turns, the refrigeration oil remains without jumping out of the oil storage chamber, so that the refrigeration oil can continue to be supplied from the oil filler port 16 to the compression section and slide. Therefore, the durability of the compressor can be further improved.

(Embodiment 6)
FIG. 11 is a diagram illustrating an example in which the compressor according to any one of Embodiments 1 to 5 of the present invention is mounted on a vehicle. The compressor 1 is attached horizontally to a drive motor 40 (or engine) of the vehicle, and is attached with the inverter case 13 side facing the vehicle front and the rear case 8 side facing the vehicle rear.

  FIG. 12 is a diagram showing a state where the vehicle having the compressor 1 of the present embodiment attached to the drive motor 40 is going down a hill, where the inverter case 13 side is lowered and the rear case 8 side is raised. The slope of the slope is assumed to be the maximum slope of the road, and the inclination of the compressor is inclined 10 degrees.

  The refrigerating machine oil accumulated in the lower part of the compressor case 6 is pushed by the dynamic pressure of the discharge gas refrigerant and flows into the oil storage chamber 9. The oil storage chamber 9 is partitioned and separated by the partition wall 8 a, and the oil communication hole 24 is formed in the stator insulator 39. Since the area of the oil communication hole 24 is smaller than the lower end and the area of the oil communication hole 24 is small, the refrigerating machine oil that is pushed by the dynamic pressure of the discharge gas refrigerant and flows into the oil storage chamber 9 is difficult to escape from the oil storage chamber 9 and easily collects. Can be maintained above the refueling port 16.

As a result of the experiment, as indicated by the solid line in FIG. 13, the oil level of 5 mm higher than the oil filler port 16 can be maintained at 8300 r / min at high speed operation, so that the oil supply to the compression mechanism unit 5 is not interrupted. Therefore, the reliability of the compressor could be improved because a stable lubrication state could be maintained. On the other hand, in the case of the comparative conventional product, as shown in FIG. 15, when it is tilted by 10 degrees, the refrigeration oil accumulates on the main bearing portion 31 side, and even if the refrigeration oil is pushed to the oil storage chamber 9 side by the dynamic pressure of the discharged refrigerant, Since the upper part of the communication hole 24 is not blocked by the refrigerating machine oil, the discharged gas refrigerant blows upward from the lower part of the rear case 8, and the refrigerating machine oil is also rolled up and sent out from the discharge port 7 into the refrigerating cycle. , It does not collect in the vicinity of the oil filler 16 at the bottom of the rear case 8. Therefore, as indicated by the rhombus (♦) broken line, the oil level H is zero mm at 4000 r / min or less, and 1 mm even at 8300 r / min on the high speed side, which is lower than the height of the fuel filler port 16, and is supplied to the compression mechanism 5. The refrigeration machine oil may be interrupted, and the reliability of the compressor may be lowered. However, according to the configuration shown in the present invention, such a situation is eliminated.

  Furthermore, when the compressors of the fourth and fifth embodiments are mounted, the angle θ connecting the lower end of the oil filler port 16 and the lower end of the oil communication hole 24 is configured to be 45 degrees or more. Even if the vehicle is subjected to inertial force or centrifugal force during sudden acceleration / deceleration or turning, the refrigeration oil does not jump out of the oil storage chamber 9, and the oil level in the oil storage chamber 9 can always be maintained higher than the oil supply port 16.

  Therefore, even if the vehicle suddenly accelerates or decelerates or turns, the refrigeration oil can be continuously supplied to the compression mechanism 5 and the lubrication of the sliding portion can be maintained, thereby improving the durability of the compressor. can do.

  As described above, the present invention improves the reliability of the compression mechanism part because the oil supply to the compression mechanism part is not interrupted and a stable lubrication state can be maintained even if the attitude of the compressor is tilted up, down, left and right. In addition, the refrigeration oil discharged into the refrigeration cycle can be reduced, and the refrigeration capacity of the vehicle air conditioner and the efficiency of the refrigeration cycle can be improved. Therefore, the present invention can be applied not only to vehicles but also to compressors for transportation equipment such as trains and heavy machinery.

DESCRIPTION OF SYMBOLS 1 Compressor 4 Drive shaft 5 Compression mechanism part 6 Compcase 7 Discharge port 8 Rear case 8a Partition wall 9 Oil storage chamber 10 Fixed scroll 11 Orbiting scroll 13 Inverter case 14 Suction port 15 Discharge chamber 16 Oil supply port 22 Partition plate 23 Gas communication hole 24 Oil communication hole

Claims (4)

A compressor case that houses the motor and the compression mechanism, a rear case that has a discharge port that delivers the discharge gas refrigerant compressed by the compression mechanism to the refrigeration cycle, a space in which the motor is housed, and a space in the rear case A partition plate for partitioning the space, wherein the upper portion of the space formed between the partition plate and the rear case is a discharge chamber and the lower portion is an oil storage chamber, and the oil storage port is provided from an oil supply port provided in the oil storage chamber. A compressor that supplies indoor refrigerating machine oil to the compression mechanism unit, and provided with a partition wall that separates the discharge chamber and the oil storage chamber in the rear case, and an upper portion of the partition plate, A gas communication hole that communicates the space inside the comp case and the discharge chamber is provided, and an oil communication hole that communicates the space inside the comp case and the oil storage chamber is provided at the lower portion of the partition plate .
The compressor characterized in that the upper part of the opening of the oil communication hole is provided at a position higher than the oil supply port and lower than the lower end of the stator / insulator of the motor . A compressor case that houses the motor and the compression mechanism, a rear case that has a discharge port that delivers the discharge gas refrigerant compressed by the compression mechanism to the refrigeration cycle, a space in which the motor is housed, and a space in the rear case A partition plate for partitioning the space, wherein the upper portion of the space formed between the partition plate and the rear case is a discharge chamber and the lower portion is an oil storage chamber, and the oil storage port is provided from an oil supply port provided in the oil storage chamber. A compressor that supplies indoor refrigerating machine oil to the compression mechanism unit, and provided with a partition wall that separates the discharge chamber and the oil storage chamber in the rear case, and an upper portion of the partition plate, A gas communication hole that communicates the space inside the comp case and the discharge chamber is provided, and an oil communication hole that communicates the space inside the comp case and the oil storage chamber is provided at the lower portion of the partition plate.
The gas communication holes comprises a plurality of holes, of which at least one compressors you characterized in that provided in the partition wall near the top. A compressor case that houses the motor and the compression mechanism, a rear case that has a discharge port that delivers the discharge gas refrigerant compressed by the compression mechanism to the refrigeration cycle, a space in which the motor is housed, and a space in the rear case A partition plate for partitioning the space, wherein the upper portion of the space formed between the partition plate and the rear case is a discharge chamber and the lower portion is an oil storage chamber, and the oil storage port is provided from an oil supply port provided in the oil storage chamber. A compressor for supplying indoor refrigeration oil to the compression mechanism,
A partition wall for partitioning and separating the discharge chamber and the oil storage chamber is provided in the rear case, and a gas communication hole for connecting the space inside the comp case and the discharge chamber is provided at an upper portion of the partition plate. In the lower part of the partition plate, an oil communication hole for communicating the space inside the comp case and the oil storage chamber is provided,
Lower and the fuel supply port of the oil storage chamber is lower than the oil communication hole bottom, pressure you, characterized in that said angle formed by connecting the lower ends of the fuel supply port and said oil communication holes θ is from 45 degrees or more horizontal lines Reduction machine. A vehicle air conditioner configured by mounting the compressor according to any one of claims 1 to 3 on a vehicle.