JP2007170414A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the taking-out quantity of the refrigerator oil to the outside of a compressor by returning the separated refrigerator oil to an oil reservoir. <P>SOLUTION: The compressor is furnished with a compressor mechanism which is stored in a sealed container and compresses the refrigerant induced from the outside of the sealed container and discharges it to the discharge space in the sealed container; an electric motor part which is arranged in the first space of the sealed container on the opposite axial direction side of the compression mechanism and drives the compression mechanism through a main shaft consisting of a stator 7 and a rotor 8; a discharge pipe which is arranged at the sealed container and opens to the first space; an outside flow channel of the compression mechanism which is arranged at the outer circumference of the compression mechanism and communicates the discharge space with the first space; and a fan which is arranged at the edge part on the side of the first space of the rotor. The refrigerant discharged to the discharge space is led to the first space through the outer circumference channel of the compression mechanism and exhausted to the outside of the sealed container after passing through a fan 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a refrigerant compressor having a compression mechanism section and an electric motor section in an airtight container.

  FIG. 8 is a longitudinal sectional view of a conventional scroll compressor disclosed in Japanese Patent Application Laid-Open No. 2000-161254.

  In FIG. 8, 1 is a fixed scroll, and the outer peripheral part is fastened to the guide frame 15 by bolts (not shown). A suction pipe 10 a is press-fitted through the sealed container 10 from the side surface of the fixed scroll 1.

  Reference numeral 2 denotes an orbiting scroll, and a plate-like spiral tooth 2b having substantially the same shape as the plate-like spiral tooth 1b provided on the base plate portion 1a of the fixed scroll 1 is provided on the upper surface of the base plate portion 2a. The compression chamber 1d is geometrically formed. A hollow cylindrical boss 2f is formed at the center of the surface of the base plate 2a opposite to the plate-like spiral teeth 2b, and is rotatably engaged with the swing shaft 4b at the upper end of the main shaft 4. Further, a thrust surface 2d that can slide in contact with the thrust bearing 3a of the compliant frame 3 is formed on the surface of the base plate 2a opposite to the plate-like spiral teeth 2b.

  The compliant frame 3 has two upper and lower cylindrical surfaces 3d and 3e provided on the outer peripheral portion thereof supported in a radial direction by cylindrical surfaces 15a and 15b provided on the inner peripheral portion of the guide frame 15, and has a central portion. Are formed with a main bearing 3c and a sub main bearing 3h that support the main shaft 4 that is rotationally driven by the stator 7 in the radial direction. Further, a communication passage 3s penetrating in the axial direction from the surface of the thrust bearing 3a is provided, and the thrust bearing side opening 2k is arranged to face the swing scroll extraction hole 2j.

  Although the outer peripheral surface 15g of the guide frame 15 is fixed to the sealed container 10 by shrink fitting or welding, the high pressure discharged from the discharge port 1f of the fixed scroll 1 by the notch 15c provided on the outer peripheral portion. A flow path for guiding the refrigerant gas to the discharge pipe 10b provided between the compression mechanism and the electric motor element is secured.

  Reference numeral 4 denotes a main shaft. An upper end portion of the main shaft 4 is formed with a rocking shaft 4b that is rotatably engaged with a rocking bearing 2c of the rocking scroll 2, and a main shaft balancer 4e is fitted on the lower side thereof. Yes. Furthermore, a main shaft portion 4c that is rotatably engaged with the main bearing 3c and the sub main bearing 3h of the compliant frame 3 is formed therebelow. Further, a sub shaft portion 4d that is rotatably engaged with the sub bearing 6a of the sub frame 6 is formed on the lower side of the main shaft 4, and the rotor 8 is shrink-fitted between the sub shaft portion 4d and the main shaft portion 4c. It has been. A first balancer 8a is fixed to the upper end surface of the rotor 8 and a second balancer 8b is fixed to the lower end surface thereof, and a total of three balancers together with the spindle balancer 4e described above provide a static balance and a dynamic balance. It has been. Further, an oil pipe 4f is press-fitted into the lower end of the main shaft 4 so that the refrigerating machine oil 10e accumulated in the oil sump 10g at the bottom of the sealed container 10 is sucked up.

  Next, the basic operation of this conventional scroll compressor will be described. The low-pressure suction refrigerant enters the compression chamber 1d formed by the plate-like spiral teeth of the fixed scroll 1 and the swing scroll 2 from the suction pipe 10a. The orbiting scroll 2 driven by the stator 7 reduces the volume of the compression chamber 1d along with the eccentric orbiting motion. Due to this compression stroke, the suction refrigerant becomes high pressure and is discharged into the sealed container 10 from the discharge port 1 f of the fixed scroll 1.

  The refrigerating machine oil 10e stored in the oil sump 10g at the bottom of the sealed container 10 is guided to the swinging bearing portion 2g through the hollow space 4g passing through the main shaft 4 in the axial direction due to the differential pressure. The refrigerating machine oil having an intermediate pressure due to the squeezing action of the bearing portion fills a space (boss portion space) 2h surrounded by the orbiting scroll 2 and the compliant frame 3, and adjusts the pressure connecting this space and the low-pressure atmosphere space. It is guided to a low pressure space via a valve (not shown) and sucked into the compression chamber 1d together with a low pressure refrigerant gas. The refrigerating machine oil is discharged into the sealed container 10 from the discharge port 1f together with the high-pressure refrigerant gas by the compression stroke.

JP 2000-161254 A

  However, in the conventional high-pressure shell type scroll compressor described above, the refrigerant gas and the refrigerating machine oil are discharged in a mixed state as shown in FIG. FIG. 9 is a diagram illustrating the flow of refrigerant gas and refrigeration oil in a conventional compressor. In the figure, 1f is a discharge port, 15c is a notch provided in the outer periphery of the guide frame 15, and 10b is a discharge pipe. Moreover, the white arrow in a figure represents the flow of refrigerant gas, and the black arrow represents the flow of refrigeration oil.

  The refrigerant gas discharged from the discharge port 1f and the refrigerating machine oil are mixed and passed through the notch 15c provided in the outer peripheral portion of the guide frame 15 and guided between the guide frame 15 and the motor element, and finally discharged. A large amount of refrigerating machine oil is taken out of the compressor together with the refrigerant gas through the pipe 10b, and the pressure loss and heat transfer performance deteriorate in the unit, or the compressor is exhausted due to oil exhaustion. There was a problem in reliability that the seizure of bearings and the like was caused.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain a highly reliable compressor. Moreover, it aims at obtaining the compressor which can isolate | separate refrigerant gas and refrigeration oil. Another object of the present invention is to obtain a compressor capable of returning the separated refrigerating machine oil to the sump and suppressing the amount of refrigerating machine oil taken out of the compressor.

  A compressor according to the present invention is housed in a sealed container, compresses refrigerant sucked from outside the sealed container, and discharges it into a discharge space in the sealed container, and a discharge space and a shaft with respect to the compression mechanism part. An electric motor unit that is arranged in a first space in a sealed container on the opposite side and includes a stator and a rotor and drives a compression mechanism through a main shaft, and is provided in the sealed container and opens into the first space. A discharge pipe, a compression mechanism part outer peripheral side flow path that is provided on the outer peripheral side of the compression mechanism part and communicates the discharge space and the first space, and a fan provided at an end of the rotor on the first space side And the refrigerant discharged into the discharge space is guided to the first space via the compression mechanism section outer peripheral flow path, passed through the fan, and then discharged out of the sealed container.

  Further, the compressor according to the present invention is provided on the outer peripheral side of the stator, and the motor outer peripheral side flow path that communicates the first space and the second space provided on the opposite side in the axial direction with respect to the motor portion. A motor inner peripheral flow path that is provided between the stator and the rotor or is provided in the rotor and communicates between the second space and the first space, and the first space side of the rotor And a fan that sucks in from the inner peripheral side and discharges it to the outer peripheral side, and passes the refrigerant in the sealed container in the order of the motor outer peripheral side flow path, the motor inner peripheral side flow path, and the fan in order. It is designed to be discharged outside.

  In the compressor according to the present invention, the motor inner circumferential flow path is provided in the rotor as at least one through hole penetrating in the axial direction.

  In the compressor according to the present invention, the motor outer peripheral side passage is a notch provided on the outer peripheral side of the stator.

  Moreover, the compressor concerning this invention provides the plate for oil separation in the 2nd space side edge part of a rotor.

  Moreover, the compressor concerning this invention forms the 1 or more through-hole in the plate.

  In the compressor according to the present invention, the plate is fixed by caulking together with the second balancer provided at the second space side end of the rotor.

  In the compressor according to the present invention, the fan is provided in the same plane as the first balancer provided at the first space side end.

  In the compressor according to the present invention, the fan is fixed by caulking together with the balancer provided at the first space side end of the rotor.

  In the compressor according to the present invention, the compressor outer peripheral side flow path is separated from the discharge pipe by 90 degrees or more in the circumferential direction.

  A compressor according to the present invention is housed in a sealed container, compresses refrigerant sucked from outside the sealed container, and discharges it into a discharge space in the sealed container, and a discharge space and a shaft with respect to the compression mechanism part. An electric motor unit that is arranged in a first space in a sealed container on the opposite side and includes a stator and a rotor and drives a compression mechanism through a main shaft, and is provided in the sealed container and opens into the first space. A discharge pipe, a compression mechanism part outer peripheral side flow path that is provided on the outer peripheral side of the compression mechanism part and communicates the discharge space and the first space, and a fan provided at an end of the rotor on the first space side And the refrigerant discharged into the discharge space is guided to the first space via the compression mechanism section outer peripheral side flow path, passed through the fan, and then discharged outside the sealed container. And refrigeration oil can be separated by the compressor outer peripheral flow path and fan Separation efficiency of the refrigerating machine oil is improved, thereby improving the reliability of the bearing seizure occurs less likely compressor of the compressor caused by oil depletion. Further, the pressure loss and deterioration of heat transfer performance in the unit are reduced, and the efficiency of the unit is improved.

  Further, the compressor according to the present invention is provided on the outer peripheral side of the stator, and the motor outer peripheral side flow path that communicates the first space and the second space provided on the opposite side in the axial direction with respect to the motor portion. A motor inner peripheral flow path that is provided between the stator and the rotor or is provided in the rotor and communicates between the second space and the first space, and the first space side of the rotor And a fan that sucks in from the inner peripheral side and discharges it to the outer peripheral side, and passes the refrigerant in the sealed container in the order of the motor outer peripheral side flow path, the motor inner peripheral side flow path, and the fan in order. Because it is discharged outside, the separation efficiency of refrigerant gas and refrigeration oil is improved by changing the flow from the downward flow to the upward flow and the upward flow in the inner peripheral flow passage of the motor section, and the compressor bearing due to oil depletion Burn-in can be made difficult to occur, and the reliability of the compressor is improved. In addition, since the motor has an outer peripheral passage and an inner peripheral passage, the motor can be efficiently cooled, the performance can be improved, and the burnout and overcurrent of the motor due to overheating can be suppressed, providing high reliability. A compressor is obtained.

  In the compressor according to the present invention, since the motor inner circumferential flow path is provided in the rotor and has at least one through hole penetrating in the axial direction, the rotor can be simply configured by punching a steel plate. A refrigerant flow path can be provided. Further, since the flow passage area can be increased, the flow velocity of the refrigerant passing through the inner peripheral flow passage of the motor can be reduced, the separation efficiency between the refrigerant gas and the refrigerating machine oil is improved, and the compressor depletion due to oil depletion is achieved. Bearing seizure can be made difficult to occur.

  Further, in the compressor according to the present invention, since the motor outer peripheral side passage is a notch provided on the outer peripheral side of the stator, it is possible to provide the refrigerant flow path in the stator with a simple configuration by simply punching the steel plate. it can.

  In the compressor according to the present invention, since the oil separation plate is provided at the second space side end of the rotor, the refrigerant gas containing the refrigeration oil hits the plate and is given a centrifugal force. Refrigerating machine oil, which has a higher specific gravity than gas, is centrifuged and blown away in the direction where it hits the second coil end of the stator 7, so that the refrigerating machine oil is not discharged outside the compressor and bearing seizure is less likely to occur. Improves.

  In addition, since the compressor according to the present invention has one or more through holes formed in the plate, the refrigerating machine oil that has been separated and lowered from the refrigerant gas passes through the through holes formed in the plate and is stored in the oil reservoir 10 g from the bottom surface of the plate 21. It is possible to prevent the refrigerating machine oil from being mixed again with the refrigerant gas.

  In the compressor according to the present invention, the plate is fixed by caulking together with the second balancer provided at the second space side end of the rotor, so that a special structure for fixing the plate to the rotor is provided. Since it is not necessary, the cost can be reduced and the compressor can be further downsized.

  In the compressor according to the present invention, since the fan is provided in the same plane as the first balancer provided at the first space side end, the fan does not protrude in the axial direction from the first balancer. The compressor can be downsized.

  Further, in the compressor according to the present invention, the fan is fixed by caulking together with the first balancer provided at the first space side end of the rotor, so that the compressor manufacturing cost can be reduced. The compressor can be further downsized.

  Further, in the compressor according to the present invention, since the compressor outer peripheral flow path is separated from the discharge pipe by 90 degrees or more in the circumferential direction, the distance to the discharge pipe in the first space can be long, Thus, the refrigerant gas and the refrigerating machine oil are separated from each other, and a highly reliable compressor with little oil rising is obtained.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below. 1 is a longitudinal sectional view of a compressor representing Embodiment 1 of the present invention, and FIG. 2 is a longitudinal section of the compressor for explaining the flow of refrigerant gas and refrigeration oil in the compressor representing Embodiment 1 of the present invention. FIG. 3 is a perspective view showing a main part of the rotor of the present invention.

  In FIG. 1, 1 is a fixed scroll, and the outer peripheral part is fastened to the guide frame 15 by a bolt (not shown). A plate-like spiral tooth 1b is formed on one surface (lower side in FIG. 1) of the base plate portion 1a, and at the same time, two Oldham guide grooves 1c are formed on a substantially straight line. A claw 9c of the Oldham ring 9 is engaged with the Oldham guide groove 1c so as to be slidable back and forth. Further, a suction pipe 10 a is press-fitted through the sealed container 10 from the side surface of the fixed scroll 1.

  Reference numeral 2 denotes an orbiting scroll. A plate-like spiral tooth 2b having substantially the same shape as the plate-like spiral tooth 1b of the fixed scroll 1 is provided on the upper surface of the base plate portion 2a. Is forming. A hollow cylindrical boss 2f is formed at the center of the surface of the base plate 2a opposite to the plate-like spiral teeth 2b, and is rotatably engaged with the swing shaft 4b at the upper end of the main shaft 4. Further, a thrust surface 2d that can slide in contact with the thrust bearing 3a of the compliant frame 3 is formed on the surface of the base plate 2a opposite to the plate-like spiral teeth 2b. Further, two pairs of Oldham guide grooves 2e having a phase difference of about 90 degrees with the Oldham guide groove 1c of the fixed scroll 1 are formed on the outer peripheral portion of the swing scroll base plate 2a on a substantially straight line. The Oldham guide groove 2e is engaged with a claw 9a of the Oldham ring 9 so as to be slidable back and forth. Further, the base plate 2a is provided with an extraction hole 2j that penetrates the compression chamber 1d and the thrust surface 2d, and has a structure for extracting refrigerant gas that is being compressed and guiding it to the thrust surface 2d.

  The compliant frame 3 has two upper and lower cylindrical surfaces 3d and 3e provided on the outer peripheral portion thereof supported in a radial direction by cylindrical surfaces 15a and 15b provided on the inner peripheral portion of the guide frame 15, and has a central portion. Are formed with a main bearing 3c and a sub main bearing 3h that support the main shaft 4 that is rotationally driven by the stator 7 in the radial direction. Further, a communication passage 3s penetrating in the axial direction from the surface of the thrust bearing 3a is provided, and the thrust bearing side opening 2k is arranged to face the swing scroll extraction hole 2j. Here, the fixed scroll 1, the orbiting scroll 2, the compliant frame 3, and the guide frame 15 constitute a compression mechanism portion, and the stator 7 and the rotor 8 constitute an electric motor portion.

  The outer peripheral surface 15g of the guide frame 15 is fixed to the sealed container 10 by shrink fitting or welding, and a compression mechanism portion outer peripheral flow path 15c is provided at the outer peripheral portion by a notch or a concave portion as a refrigerant flow path. The high-pressure refrigerant gas discharged from the discharge port 1f of the fixed scroll 1 to the discharge space 100 in the sealed container 10 is compressed by the compression mechanism portion (the fixed scroll 1, the swinging motion). Discharge pipe 10b opened in the first space 101 between the scroll 2, the compliant frame 3, the guide frame 15 and the like and the electric motor part (configured by the stator 7, the rotor 8, etc.) Led to. Further, the compression mechanism portion outer peripheral side flow path 15c is provided at a position opposite to the discharge pipe 10b (approximately 180 degrees opposite side) so that the refrigerant gas is guided from the discharge space 100 to the first space 101. Yes. Here, the compression mechanism unit outer peripheral side flow path 15c has been described with respect to the example provided in the guide frame 15. However, the compression mechanism section outer peripheral side flow path 15c may be any flow path that allows the discharge space 100 and the first space 101 to communicate with each other. As long as it is a part to be used, it may be provided anywhere.

  Further, on the inner peripheral surface of the guide frame 15, there are two cylindrical grooves 15 a and 15 b that engage with the upper and lower cylindrical surfaces 3 d and 3 e formed on the outer peripheral surface of the compliant frame 3, and two seal grooves that store the sealing material. There are provided sealing materials 16a and 16b, respectively. The frame space 15f formed by the inner peripheral surface of the guide frame 15 and the outer peripheral surface of the compliant frame 3 sealed with these two sealing materials communicates only with the communication passage 3s of the compliant frame 3, and swings. The refrigerant gas in the middle of compression supplied from the scroll extraction hole 2j is enclosed.

  Reference numeral 4 denotes a main shaft, and an upper end portion of the main shaft 4 is formed with an oscillating shaft 4b that is rotatably engaged with an oscillating bearing 2c of the oscillating scroll 2, and a main shaft balancer 4e is shrink fitted on the lower side thereof. ing. Furthermore, a main shaft portion 4c that is rotatably engaged with the main bearing 3c and the sub main bearing 3h of the compliant frame 3 is formed therebelow. Further, a sub shaft portion 4d that is rotatably engaged with the sub bearing 6a of the sub frame 6 is formed on the lower side of the main shaft 4, and the rotor 8 is shrink-fitted between the sub shaft portion 4d and the main shaft portion 4c. It has been. A first balancer 8a is fixed to the upper end surface of the rotor 8 and a second balancer 8b is fixed to the lower end surface thereof, and a total of three balancers together with the spindle balancer 4e described above provide a static balance and a dynamic balance. It has been. Further, an oil pipe 4f is press-fitted into the lower end of the main shaft 4 so that the refrigerating machine oil 10e accumulated in the oil sump 10g at the bottom of the sealed container 10 is sucked up.

  Further, a glass terminal 10 f is installed on the side surface of the sealed container 10, and a lead wire from the stator 7 is joined. As described above, in the scroll compressor according to the present embodiment, the compression mechanism portion is disposed in the upper portion and the electric motor portion is disposed in the lower portion, and the main shaft 4 that drives the compression mechanism portion is accommodated in the sealed container 10, and the above-described sealed container Reference numeral 10 denotes a high-pressure shell type scroll compressor that provides a compressed discharge gas atmosphere.

  Here, in the present invention, a first balancer 8a for eliminating imbalance is provided in a substantially half-circumferential portion of the first space side (upper) end of the rotor 8, and the first space of the rotor 8 is also provided. A fan 20 is also provided on the half circumference side of the side (upper) end portion facing the first balancer 8a. Here, the fan 20 is formed so as to be sucked from the inner peripheral side and discharged to the outer peripheral side, and is provided on a plurality of blades 20b formed on the same surface as the first balancer, and on the upper surfaces of the blades 20b and the first balancer 8a. And a base plate 20a having a size substantially equal to the outer shape of the rotor 8.

  Here, as shown in FIG. 3, the base plate 20 a has a disk shape having a through hole in the central portion by sheet metal, a punched steel plate, or the like. Therefore, a space 20 c exists between the base plate 20 and the main shaft 4 in a state where the main shaft 4 is fixed to the rotor 8. In this state, the fan 20 having the blades 20b attached to the upper portion of the rotor 8 rotates synchronously with the main shaft 4 to which the rotor 8 is fixed by shrink fitting or press fitting. At this time, since the blades 20b are provided in a shape that directs the fluid flow outward in the radial direction, a negative pressure is generated in the upper portion of the rotor 8 by the rotation of the fan 20, and the base plate 20a and the main shaft A flow that sucks in the refrigerant gas containing the refrigerating machine oil is generated from the space 20c between the two.

  Next, the basic operation of the scroll compressor of the present invention will be described. The low-pressure suction refrigerant enters the compression chamber 1d formed by the plate-like spiral teeth of the fixed scroll 1 and the swing scroll 2 from the suction pipe 10a. The orbiting scroll 2 driven by the stator 7 reduces the volume of the compression chamber 1d along with the eccentric orbiting motion. Due to this compression stroke, the suction refrigerant becomes high pressure and is discharged from the discharge port 1 f of the fixed scroll 1 to the discharge space 100 in the sealed container 10.

  In the compression stroke, the intermediate-pressure refrigerant gas in the middle of compression is guided to the frame space 15f from the extraction hole 2j of the orbiting scroll 2 through the communication passage 3s of the compliant frame 3, and maintains the intermediate pressure atmosphere in this space. . The high-pressure discharge gas fills the sealed container 10 with a high-pressure atmosphere and is discharged from the discharge pipe 10b to the outside of the compressor, so that a high-pressure shell type compressor is formed in which the sealed container 10 has a high-pressure atmosphere. .

  The refrigerating machine oil 10e stored in the oil sump 10g at the bottom of the hermetic container 10 is guided by the differential pressure through the hollow space 4g penetrating the main shaft 4 in the axial direction to the swing bearing portion 2g. The refrigerating machine oil 10e that has become an intermediate pressure due to the squeezing action of the bearing portion fills the space (boss portion space) 2h surrounded by the orbiting scroll 2 and the compliant frame 3, and connects the space and the low-pressure atmosphere space. It is led to a low pressure space via a regulating valve (not shown) and sucked into the compression chamber 1d together with a low pressure refrigerant gas. The refrigerating machine oil 10e is discharged together with the high-pressure refrigerant gas from the discharge port 1f into the discharge space 100 in the sealed container 10 by the compression stroke, and enters the first space through the compression mechanism section outer peripheral flow path 15c such as a notch or a recess. Finally, it is discharged out of the sealed container 10 from the discharge pipe 10b opened in the first space.

  The compliant frame 3 has a thrust gas force that causes the fixed scroll 1 and the orbiting scroll 2 to be separated in the axial direction by a compression action, and an intermediate pressure in the boss space 2h. The sum of the forces that try to leave acts as a downward force in the figure.

  On the other hand, the differential pressure acting on the portion where the frame space 15f, which has led to the refrigerant gas in the middle of compression and becomes an intermediate pressure atmosphere, tries to separate the compliant frame 3 and the guide frame 15 and the portion exposed to the lower high pressure atmosphere. Acts as an upward force. During the steady operation, the upward force described above is set to exceed the downward force. For this reason, the compliant frame 3 is guided by the upper and lower two fitted cylindrical surfaces 3d and 3e and floats upward. . The orbiting scroll 2 slides in close contact with the compliant frame 3 and floats in the same manner, and slides with its plate-like spiral teeth 2 b in contact with the fixed scroll 1.

  Further, the thrust gas force described above becomes large at the time of start-up or liquid compression, and the orbiting scroll 2 strongly pushes the compliant frame 3 downward through the thrust bearing 3a. A comparatively large gap is formed between the tooth tip and the tooth bottom, so that it is possible to perform so-called pressure relief that can avoid an abnormal pressure rise in the compression chamber.

  Although a part or all of the overturning moment generated in the orbiting scroll 2 is transmitted to the compliant frame 3 via the thrust bearing 3a, the bearing load received from the main bearing 3c and two resultant forces that are the reaction thereof, That is, the couple force generated by the resultant force of the reaction forces received from the upper and lower cylindrical fitting surfaces 3d and 3e of the compliant frame 3 and the guide frame 15 acts so as to cancel the rollover moment. It has stability and relief operation stability.

  Here, the blade 20b provided at the end of the rotor 8 on the first space 101 side is provided with a shape that directs the fluid flow outward in the radial direction. The accompanying rotation of the fan 20 creates a negative pressure in the upper part (first space 101) of the rotor 8, and a flow is generated in which refrigerant gas and refrigerator oil are sucked from the space 20c between the base plate 20a and the main shaft 4. Therefore, in the rotor 8, the mixed gas of the refrigerant gas and the refrigerating machine oil is sucked from the inner peripheral side of the rotor 8 and flows to be discharged to the outer peripheral side.

  Therefore, the mixed gas of the refrigerant gas and the refrigerating machine oil flows from the upper center of the rotor 8 (first space 101) to the outer peripheral side and collides with the first coil end on the first space 101 side of the stator 7 so that the refrigerating machine oil flows. The refrigerant oil is separated from the refrigerant gas, and the refrigerating machine oil returns to the oil sump 10 g through the air gap.

  In the compressor of the present invention configured as described above, since the separation efficiency of the refrigerant gas and the refrigerating machine oil is improved, the pressure loss in the unit and the deterioration of the heat transfer performance are reduced, and the efficiency of the unit is improved. As a result, the bearing seizure of the compressor is less likely to occur and the reliability of the compressor is improved.

  Further, since the blades 20b are provided on the half-circumferential side facing the first balancer 8a so as to be equal to or lower than the first balancer 8a, the blades 20b may be higher (larger) than the first balancer 8a. Therefore, the space for installing the fan 20 can be reduced, and the compressor can be downsized.

  However, when the blades 20b are arranged only on the half-circumferential side facing the first balancer 8a, if the air volume is insufficient and the oil separation effect is insufficient, the fan 20 becomes higher than the first balancer 8a. The blades 20b may be arranged on the entire circumference of the upper portion of the first balancer 8a.

  In the present embodiment, the blades 20b are disposed below the base plate 20a. However, the blades 20b may be disposed above the base plate or on both upper and lower sides. Further, if the base plate 20a of the fan 20 is fixed to the rotor 8 by caulking together with the first balancer 8a as shown in FIG. 3, no special structure for fixing the fan 20 to the rotor 8 is required. The compressor manufacturing cost can be reduced, and the compressor can be further downsized.

  Further, as shown in FIG. 4, the blade 20b of the fan 20 may be integrally formed with the base plate 20a by sheet metal processing or the like and cut up. FIG. 4 is a view for explaining the structure of the fan representing the first embodiment of the present invention. In the figure, reference numeral 20 denotes a fan, which has a structure in which a blade 20b of the fan 20 is formed integrally with the base plate 20a by sheet metal processing or the like and cut up. If comprised in this way, it will become possible to manufacture the fan 20 at low cost, and a compressor manufacturing cost can be reduced. Also, the fan 20 can be easily assembled. Further, the same effect can be obtained even if the blade 20b is molded integrally with the end ring of the rotor 8 by casting or the like.

  As described above, in the present embodiment, the compression mechanism unit that is stored in the sealed container 10 and compresses the refrigerant sucked from outside the sealed container 10 and discharges it to the discharge space 100 in the sealed container 10, and the sealed container 10. The compression mechanism is disposed in a first space 101 in the sealed container 10 that is opposite to the discharge space 100 in the axial direction with respect to the compression mechanism, and includes a stator 7 and a rotor 8, and the compression mechanism via the main shaft 4. A first discharge pipe 10b that opens the refrigerant discharged to the discharge space 100 through the discharge space 100 and the first space 101, provided on the outer peripheral side of the motor portion that drives the compressor portion and the compression mechanism portion. A compression mechanism outer peripheral side flow path 15 a for guiding to the space 101, and an oil separating fan 20 provided at an end of the rotor 8 on the first space 101 side, and discharged into the sealed container 10. Guided refrigerant to the first space 101 Since the oil is separated by 20 and discharged from the discharge pipe 10b to the outside of the sealed container 10, the refrigerant gas and the refrigerating machine oil can be separated by the fan 20, and the refrigerating machine oil separation efficiency is improved. Compressor bearing seizure due to exhaustion is less likely to occur and the reliability of the compressor is improved. Further, the pressure loss and deterioration of heat transfer performance in the unit are reduced, and the efficiency of the unit is improved.

  Further, since the fan 20 is fixed by caulking together with the first balancer 8a provided at the end of the rotor 8 on the first space 101 side, the compressor manufacturing cost can be reduced and the compression can be reduced. The machine can be made smaller. Further, since the blade 20b of the fan 20 is integrally formed with the base plate 20a by sheet metal processing or the like, the fan 20 can be manufactured at a low cost, and the compressor manufacturing cost is reduced. be able to. Also, the fan 20 can be easily assembled.

  Further, since the fan 20 is provided in the same plane as the first balancer, the fan 20 does not protrude in the axial direction as compared with the first balancer, and the compressor can be miniaturized. In addition, since the compression mechanism portion outer peripheral side flow path 15c is provided at a position separated by approximately 90 degrees or more in the circumferential direction with respect to the discharge pipe 10f (a position on the opposite side of approximately 180 degrees is good) The distance through which the discharge pipe 10b passes in the first space 101 can be long, and the refrigerant gas and the refrigerating machine oil are separated in the meantime, so that a highly reliable compressor with little oil rising can be obtained.

  The above is a description of a high-pressure shell type scroll compressor, but it is not necessary to use a separate scroll compressor, and it goes without saying that the same effect can be obtained with a rotary compressor, a reciprocating compressor, and other compressors. .

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described. The compressor of the present embodiment is the compressor described in the first embodiment, wherein a passage 8c penetrating in the axial direction is provided in the rotor 8 as shown in FIG. FIG. 5 is a longitudinal sectional view of a compressor representing the second embodiment of the present invention.

  In the figure, the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals, and the description thereof is omitted. In the figure, reference numeral 8c denotes an axial passage formed in the rotor 8 in the axial direction. The air gap provided between the passage 8c or the stator 7 and the rotor 8 constitutes a motor inner peripheral flow path. With this configuration, the refrigerant gas containing the refrigeration oil introduced between the guide frame 15 and the electric motor elements (stator 7 and rotor 8) is provided on the outer peripheral side of the stator 7 by a notch or a recess. The motor outer peripheral flow path 7a is lowered and reaches the second space 102 (lower space of the motor part) in the sealed container, and then the motor inner peripheral flow path (the passage 8c of the rotor 8 and the air gap) is raised. A flow like this will occur.

  That is, the motor outer peripheral side flow path 7a provided on the outer peripheral side of the stator 7 is used as a refrigerant lowering flow path, and the motor inner peripheral side flow path (passage 8c that is a through hole provided in the rotor 8 or air The gap) is used as an ascending flow path for the refrigerant. Therefore, when descending between the motor outer peripheral side flow paths 7a (notches, recesses, etc.) provided on the outer peripheral side of the stator 7, and the motor inner peripheral flow paths (the path 8d of the rotor 8 and the air gap). The refrigeration oil is separated as it rises.

  The refrigerating machine oil is also separated when the flow direction is changed from the downward flow to the upward flow. Further, the refrigerant gas rising through the passage 8c is sucked from the inner peripheral side of the fan 20, blown off to the outer peripheral side by the blades 20b, and collides with the first coil end on the first space 101 side of the stator 7 to be frozen. Machine oil comes to be separated. Thereafter, the refrigerating machine oil separated from the refrigerant gas returns to the oil sump 10 g through the inner wall of the hermetic container 10, the passage 8 c of the rotor 8, and the air gap between the stator 7 and the rotor 8.

  The compressor configured in this manner improves the separation efficiency of refrigerant gas and refrigeration oil, thereby reducing the pressure loss and deterioration of heat transfer performance in the unit, improving the efficiency of the unit, and improving the efficiency of the compressor due to oil depletion. Bearing seizure hardly occurs and the reliability of the compressor is improved.

  Further, the refrigerant gas containing the refrigerating machine oil descends between the motor outer peripheral flow paths 7a provided in the stator 7 and reaches the second space 102, and then the motor inner peripheral side such as the air gap or the passage 8c. Since the flow path is raised, not only the gap (air gap) between the stator 7 and the rotor 8 but also the passage 8c provided in the rotor 8 is passed, so that the refrigerant gas containing the refrigerating machine oil The flow path area can be increased, and therefore the flow rate of the refrigerant passing through the inner peripheral flow path of the electric motor can be reduced, and the separation efficiency between the refrigerant gas and the refrigerating machine oil can be improved.

  Therefore, in the compressor of the present embodiment, the separation efficiency of the refrigerant gas and the refrigerating machine oil is improved, so that the pressure loss in the unit and the deterioration of the heat transfer performance are reduced, the efficiency of the unit is improved, and the compressor due to oil depletion is improved. The bearing seizure hardly occurs and the reliability of the compressor is improved.

  As described above, in the present embodiment, the second space provided on the outer peripheral side of the stator 7 and provided on the opposite side in the axial direction from the first space 101 with respect to the first space 101 and the motor unit. The motor outer periphery side flow path 7 a that communicates with the 102, and is provided between the stator 7 and the rotor 8, or is provided on the rotor 8 to communicate the second space 102 and the first space 101. Oil provided on the inner peripheral flow path (passage 8c or air gap provided in the rotor 8) and the end of the rotor 8 on the first space 101 side, and sucked from the inner peripheral side and discharged to the outer peripheral side And a fan 20 for separation. The refrigerant in the sealed container 10 is passed through the motor outer peripheral side passage 7a, the motor inner peripheral side flow path (passage 8c or air gap), and the fan 20 in this order, and is discharged out of the sealed container 10. Like to do.

  Therefore, the flow area of the refrigerant gas containing the refrigerating machine oil can be increased, and the flow rate of the refrigerant passing through the inner peripheral flow path of the electric motor is decreased. Therefore, the separation efficiency between the refrigerant gas and the refrigerating machine oil is improved, and the oil Compressor bearing seizure due to exhaustion is less likely to occur and the reliability of the compressor is improved. In addition, since the motor outer peripheral side passage 7a and the motor inner peripheral side passage are provided in the motor, the motor can be efficiently cooled, the performance can be improved, and the burnout and overcurrent of the motor due to overheating can be suppressed. A high compressor is obtained.

  In addition, since the passage 8c of the inner peripheral flow passage of the motor is at least one or more through holes penetrating the rotor 8 in the axial direction, the refrigerant flow passage can be provided to the rotor with a simple configuration by simply punching the steel plate. Can be provided. Furthermore, since the motor outer peripheral side passage 7a is a notch, a recess, or a through hole provided on the outer peripheral side of the stator, the refrigerant flow path can be provided in the stator with a simple configuration simply by punching a steel plate.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described. The compressor of the present embodiment is the compressor described in the first or second embodiment, and a plate 21 that rotates synchronously with the main shaft that drives the compression mechanism is attached to the lower portion of the rotor 8 as shown in FIG. It is what I did. FIG. 6 is a longitudinal sectional view of a compressor representing the third embodiment of the present invention.

  In the figure, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof is omitted. In the figure, 21 is a plate attached to the lower part of the second balancer 8b at the lower end (on the second space 102 side) of the rotor 8, and has an outer diameter smaller than the inner diameter of the second coil end 7b of the stator 7. Therefore, there is a gap between the outer diameter of the plate 21 and the inner diameter of the second coil end 7b of the stator 7, and the refrigerant gas can pass through this gap.

  Therefore, when the compressor configured as described above is operated, the refrigerant gas sucked from the suction pipe 10a is compressed by the compression mechanism portion and then discharged into the sealed container 10 from the discharge port 1f, and the stator. 7 is moved down the motor outer peripheral side flow path 7a (notch, recess, etc.) and reaches the second space 102 in the sealed container 10, and then the motor inner peripheral flow path (the passage 8c of the rotor 8 or Increase the air gap. At this time, the refrigerant gas containing the refrigerating machine oil collides with the plate 21 provided on the second space 102 side of the rotor 8 and is given a centrifugal force, so that the refrigerating machine oil having a higher specific gravity than the refrigerant gas is used as the stator. The second coil end 7b of the 7 is hit and centrifuged. The separated refrigerating machine oil is dropped from between the second coil ends 7b through the oil return hole 6b of the subframe 6 toward the oil sump 10g.

  Further, the refrigerant gas rising through the passage 8c is blown off from the inner peripheral side of the fan 20 to the outer peripheral side by the blades 20b and hits the first coil end on the first space 101 side of the motor stator 7 so that the refrigerating machine oil. Will be separated. Thereafter, the refrigerating machine oil separated from the refrigerant gas returns to the oil sump 10 g through the inner wall of the hermetic container 10, the passage 8 c of the rotor 8, and the air gap between the stator 7 and the rotor 8.

  The compressor configured in this manner improves the separation efficiency of refrigerant gas and refrigeration oil, thereby reducing the pressure loss and deterioration of heat transfer performance in the unit, improving the efficiency of the unit, and improving the efficiency of the compressor due to oil depletion. Bearing seizure hardly occurs and the reliability of the compressor is improved.

  In the present embodiment, the case where the fan 20 is provided on the rotor 8 is described. However, even when the fan 20 is not provided on the rotor 8, the oil separation effect can be obtained by attaching only the plate 21. In addition, the cost can be reduced by the amount of the fan 20.

  Further, as shown in FIG. 7, one or more holes 21 a may be formed in the plate 21 attached to the lower part of the rotor 8. FIG. 7 is a sectional view of another compressor representing the third embodiment of the present invention. In the figure, the plate 21 is provided with one or more through holes 21a for oil return.

  With this configuration, the refrigeration oil separated and lowered from the refrigerant gas above the plate 21 (passage 8c, fan 20, etc.) passes through the hole 21a formed in the plate 21 and is discharged from the bottom surface of the plate 21 to the oil sump 10g. As a result, the oil return is improved, and the separated refrigerating machine oil can be prevented from being mixed with the refrigerant gas again.

  Therefore, in the compressor of the present embodiment, the separation efficiency of the refrigerant gas and the refrigeration oil is improved, so that the pressure loss in the unit and the deterioration of the heat transfer performance are reduced, the unit efficiency is improved, and the compressor due to oil depletion is improved. The bearing seizure hardly occurs and the reliability of the compressor is improved.

  The plate 21 may be fixed together with the second balancer 8b of the rotor 8 by caulking. If comprised in this way, since the special structure for fixing the plate 21 to the rotor 8 is not required, it becomes possible to reduce cost and to make a compressor more compact.

  Since it is configured as described above, in the present embodiment, since the oil-utilizing plate 21 is provided at the end of the rotor 8 on the second space 102 side, the refrigerant gas containing the refrigerating machine oil collides with the plate 21. As a result, centrifugal force is applied, and the refrigeration oil, which has a higher specific gravity than the refrigerant gas, is centrifuged and blown in the direction of hitting the second coil end 7b of the stator 7, so that the refrigeration oil is not discharged out of the compressor and the bearing is seized. And the reliability of the compressor is improved.

  Further, since one or more through holes 21a are formed in the plate 21, the refrigerating machine oil separated and lowered from the refrigerant gas passes through the through holes 21a formed in the plate 21 and is discharged from the lower surface of the plate 21 to the oil sump 10g. As a result, the oil return is improved and the separated refrigerating machine oil can be prevented from being mixed with the refrigerant gas again. Further, since the plate 21 is fixed by caulking together with the second balancer provided on the second space side of the rotor, a special structure for fixing the plate 21 to the rotor 8 is not required, so that the cost is reduced. It becomes possible to reduce, and it becomes possible to further reduce the size of the compressor.

It is a longitudinal cross-sectional view of the compressor showing Embodiment 1 of this invention. It is a perspective view showing the principal part of the rotor of this invention. It is a longitudinal cross-sectional view of the compressor for demonstrating the flow of the refrigerant gas of the compressor and refrigerating machine oil showing Embodiment 1 of this invention. It is a figure for demonstrating the structure of the fan showing Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the compressor showing Embodiment 2 of this invention. It is a longitudinal cross-sectional view of the compressor showing Embodiment 2 of this invention. It is sectional drawing of another compressor showing Embodiment 3 of this invention. It is a longitudinal cross-sectional view of the conventional compressor. It is a longitudinal cross-sectional view of the compressor for demonstrating the flow of the refrigerant gas of the conventional compressor, and refrigeration oil.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Fixed scroll, 1a Base plate part, 1b Plate-shaped spiral tooth, 1c Oldham guide groove, 1d Compression chamber, 1f Discharge port, 1g Suction pressure atmosphere space, 2 Swing scroll, 2a Base plate part, 2b Plate-shaped spiral tooth, 2c Oscillating bearing 2d Thrust surface, 2e Oldham guide groove, 2f Boss part, 2g Oscillating bearing space, 2h Boss part space, 2j Extraction hole, 2k Connecting passage opening, 3 Compliant frame, 3a Thrust bearing, 3c Main bearing 3d upper cylindrical surface, 3e lower cylindrical surface, 3h sub main bearing, 3s communication passage, 4 main shaft, 4b swing shaft portion, 4c main shaft portion, 4d sub bearing portion, 4e main shaft balancer, 4f oil pipe, 4g hollow space 6 Sub-frame, 6a Sub-bearing, 7 Stator, 7a Motor outer peripheral flow path, 7b Second coil end, 8 Rotor, 8a 1st Balancer, 8b Second balancer, 8c Motor inner peripheral flow path, 9 Oldham ring, 9a Swing scroll side claw, 9c Fixed scroll side claw, 10 Sealed container, 10a Suction pipe, 10b Discharge pipe, 10e Refrigerating machine oil, 10f Glass Terminal, 10 g Oil sump, 15 Guide frame, 15 a Upper cylindrical surface, 15 b Lower cylindrical surface, 15 c Compression mechanism outer peripheral flow path, 15 f Frame space, 15 g outer peripheral surface, 16 a Upper sealing material, 16 b Lower sealing material, 20 Fan, 20a base plate, 20b blade, 20c space, 21 plate, 21a through hole, 100 discharge space, 101 first space, 102 second space.

Claims (10)

A compression mechanism that is housed in a sealed container and compresses refrigerant sucked from outside the sealed container and discharges the refrigerant into a discharge space in the sealed container; and an axially opposite side of the discharge space with respect to the compression mechanism part An electric motor unit that is disposed in a first space in the sealed container and includes a stator and a rotor and drives the compression mechanism unit via a main shaft, and is provided in the sealed container and opens into the first space. A discharge pipe, a compression mechanism portion outer peripheral flow path provided on the outer peripheral side of the compression mechanism portion, and communicating the discharge space and the first space, and an end portion of the rotor on the first space side And a fan provided to the outside of the sealed container after the refrigerant discharged into the discharge space is guided to the first space through the outer peripheral flow path of the compression mechanism and passed through the fan. A compressor characterized in that it is discharged. An electric motor outer peripheral flow path provided on an outer peripheral side of the stator and communicating with the first space and a second space provided on the opposite side in the axial direction with respect to the electric motor unit; the stator; A motor inner peripheral flow path that is provided between the rotor and that is provided in the rotor and communicates between the second space and the first space; and the first space side of the rotor. And a fan that sucks in from the inner peripheral side and discharges it to the outer peripheral side, and passes the refrigerant in the sealed container in the order of the motor outer peripheral side flow path, the motor inner peripheral side flow path, and the fan. The compressor according to claim 1, wherein the compressor is discharged outside the sealed container. The compressor according to claim 2, wherein the electric motor inner peripheral side flow path is provided in the rotor and is at least one through hole penetrating in the axial direction. The compressor according to claim 2 or 3, wherein the motor outer peripheral side passage is a notch provided on the stator outer peripheral side. The compressor according to any one of claims 2 to 4, wherein a plate for oil separation is provided at an end portion on the second space side of the rotor. The compressor according to claim 5, wherein one or more through holes are formed in the plate. The compressor according to claim 5 or 6, wherein the plate is fixed by caulking together with a second balancer provided at the second space side end of the rotor. The compressor according to any one of claims 1 to 7, wherein the fan is provided in the same plane as a first balancer provided at an end portion on the first space side. The compressor according to any one of claims 1 to 8, wherein the fan is fixed by caulking together with a first balancer provided at an end portion on the first space side of the rotor. The compressor according to any one of claims 1 to 9, wherein the compressor outer peripheral side channel is separated from the discharge pipe by 90 degrees or more in a circumferential direction.

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