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A regulator assembly, comprising a vaned diffuser, a motor, a driving gear engaged with a driven gear, the driven gear having rectangle-shaped through holes thereon, the rectangle-shaped through holes disposed and extending along an axis of the driven gear, and a regulating mechanism including a reg

A regulator assembly, comprising a vaned diffuser, a motor, a driving gear engaged with a driven gear, the driven gear having rectangle-shaped through holes thereon, the rectangle-shaped through holes disposed and extending along an axis of the driven gear, and a regulating mechanism including a regulator, a supporting member, wherein the regulator is sleeved on the supporting member, and wherein the vaned diffuser is fixed on the supporting member, and regulator sliding members fixed to the regulator through the rectangle-shaped through holes of the driven gear, whereby the motor is configured to drive the driving gear to rotate, the driving gear is configured to drive the driven gear to rotate, the driven gear is configured to push the regulator sliding members to move, and the regulator sliding members are configured to drive the regulator to rotate relative to the vaned diffuser, thus driving the regulator to move along its axis.

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1. A regulator assembly, comprising: a vaned diffuser provided with internal threads;a motor rotatable forwardly and reversibly;a driving gear engaged with a driven gear;the driven gear having rectangle-shaped through holes thereon, the rectangle-shaped through holes disposed and extending along an

1. A regulator assembly, comprising: a vaned diffuser provided with internal threads;a motor rotatable forwardly and reversibly;a driving gear engaged with a driven gear;the driven gear having rectangle-shaped through holes thereon, the rectangle-shaped through holes disposed and extending along an axis of the driven gear; anda regulating mechanism including: a regulator provided with external threads, the external threads engagable with the internal threads of the vaned diffuser, wherein the driven gear is sleeved on the regulator;a supporting member, wherein the regulator is sleeved on the supporting member, and wherein the vaned diffuser is fixed on a case; andregulator sliding members fixed to the regulator through the rectangle-shaped through holes of the driven gear;whereby the motor is configured to drive the driving gear to rotate, the driving gear is configured to drive the driven gear to rotate, the driven gear is configured to push the regulator sliding members to move, and the regulator sliding members are configured to drive the regulator to rotate relative to the vaned diffuser, thus driving the regulator to move along its axis. 2. The regulator assembly according to claim 1, further comprising a driven gear stopper sleeved on the regulator and disposed between the driven gear and the vaned diffuser. 3. The regulator assembly of claim 2, wherein a bearing is disposed between the driven gear and the driven gear stopper. 4. The regulator assembly of claim 3, wherein a sealing groove is disposed in a periphery of the supporting member, and a sealing ring is disposed in the sealing groove. 5. The regulator assembly of claim 2, wherein a sealing groove is disposed in a periphery of the supporting member, and a sealing ring is disposed in the sealing groove. 6. The regulator assembly of claim 2, wherein grooves, which match with the rectangle-shaped through holes of the driven gear, are disposed on a periphery of the regulator, and an axis of each groove is perpendicular to the axis of the driven gear, each regulator sliding member fixed in a corresponding groove through a corresponding rectangle-shaped through hole. 7. The regulator assembly of claim 6, wherein at least two rectangle-shaped through holes are arranged evenly along a circumference of the driven gear, and the number of the grooves is identical to the number of the rectangle-shaped through holes. 8. The regulator assembly of claim 1, wherein grooves, which match with the rectangle-shaped through holes of the driven gear, are disposed on a periphery of the regulator, and an axis of each groove is perpendicular to the axis of the driven gear, each regulator sliding member fixed in a corresponding groove through a corresponding rectangle-shaped through hole. 9. The regulator assembly of claim 8, wherein at least two rectangle-shaped through holes are arranged evenly along a circumference of the driven gear, and the number of the grooves is identical to the number of the rectangle-shaped through holes. 10. The regulator assembly of claim 8, wherein the groove is provided with internal threads, the regulator sliding member is a bolt, and the internal threads of the groove are engaged with and fixed with external threads of the regulator sliding member. 11. The regulator assembly of claim 1, wherein a sealing groove is disposed in a periphery of the supporting member, and a sealing ring is disposed in the sealing groove. 12. The regulator assembly of claim 1, wherein the length of the regulator is greater than the length of the supporting member. 13. A refrigeration compressor, comprising: an impeller;a vaned diffuser provided with internal threads;a motor rotatable forwardly and reversibly;a driving gear engaged with a driven gear;the driven gear having rectangle-shaped through holes thereon, the rectangle-shaped through holes disposed and extending along an axis of the driven gear; anda regulating mechanism including: a regulator provided with external threads, the external threads engagable with the internal threads of the vaned diffuser, wherein the driven gear is sleeved on the regulator;a supporting member, wherein the regulator is sleeved on the supporting member, and wherein the vaned diffuser is fixed on a casing; andregulator sliding members fixed to the regulator through the rectangle-shaped through holes of the driven gear;whereby the motor is configured to drive the driving gear to rotate, the driving gear is configured to drive the driven gear to rotate, the driven gear is configured to push the regulator sliding members to move, and the regulator sliding members are configured to drive the regulator to rotate relative to the vaned diffuser, thus driving the regulator to move along its axis. 14. The refrigeration compressor of claim 13, wherein the regulator assembly further comprises a driven gear stopper sleeved on the regulator and disposed between the driven gear and the vaned diffuser. 15. The refrigeration compressor of claim 14, wherein a bearing is disposed between the driven gear and the driven gear stopper. 16. The refrigeration compressor of claim 13, wherein grooves, which match with the rectangle-shaped through holes, are disposed on a periphery of the regulator, an axis of each groove is perpendicular to the axis of the driven gear, and each regulator sliding member is fixed in a corresponding groove through a corresponding rectangle-shaped through hole. 17. The refrigeration compressor of claim 16, wherein at least two rectangle-shaped through holes are arranged evenly along a circumference of the driven gear, and the number of the grooves is identical to the number of the rectangle-shaped through holes. 18. The refrigeration compressor of claim 13, wherein an end of the regulator with external threads thereon is arranged near an outlet of the impeller, and when the motor drives the driving gear to rotate forwardly, the driving gear drives the driven gear to rotate forwardly, and the end of the regulator with external threads thereon is retracted continuously, until the outlet of the impeller is opened completely, and when the motor drives the driving gear to rotate reversibly, the driving gear drives the driven gear to rotate reversibly, and the end of the regulator with external threads thereon extends continuously, until the outlet of the impeller is closed completely. 19. The refrigeration compressor of claim 18, wherein the regulator assembly further comprises a driven gear stopper sleeved on the regulator and disposed between the driven gear and the vaned diffuser. 20. The refrigeration compressor of claim 19, wherein a bearing is disposed between the driven gear and the driven gear stopper.