Refrigerant compressor with stator elastic support

Patent metadata

Field	Value
Publication number	US-12146486-B2
Application number	US-202117355710-A
Country	US
Kind code	B2
Filing date	Jun 23, 2021
Priority date	Jun 24, 2020
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

In a refrigerant compressor comprising an overall housing with a motor housing portion, in which there is arranged a motor chamber having, provided therein, an electric motor comprising a stator and a rotor, and with a compressor housing portion which has a compressor unit, in order to be able to mount the stator as easily as possible it is proposed that the stator is mounted in the motor housing portion by means of supporting elements inserted into the motor housing portion, which supporting elements on the one hand abut against a stator-receiving surface of the motor housing portion and on the other hand surround the stator inserted into the supporting elements on its outer side and support it spring-elastically relative to the stator-receiving surface.

First claim

The invention claimed is:

1. A refrigerant compressor comprising an overall housing with a motor housing portion, in which there is arranged a motor chamber having, provided therein, an electric motor comprising a stator and a rotor, and with a compressor housing portion which has a compressor unit,
the stator is mounted in the motor housing portion by supports inserted into the motor housing portion, which supports on the one hand abut against a stator-receiving surface of the motor housing portion and on the other hand surround the stator inserted into the supports on its outer side and support it elastically relative to the stator-receiving surface, and wherein the supports have elastic bodies arranged at defined angular intervals around the rotor axis, enabling cooling of the electric motor by allowing refrigerant to flow between the stator receiving surface and the outer side of the stator and through the supports, wherein the supports are arranged successively in the direction of the rotor axis and are positioned spaced apart from one another in the motor housing portion by a spacer element, and wherein the spacer element is inserted into the stator-receiving surface.

2. The refrigerant compressor of claim 1 , wherein the stator surrounds the rotor with only a gap therebetween.

3. The refrigerant compressor according to claim 2 , wherein the elastic bodies are spring-elastic bodies supporting the stator elastically relative to the stator-receiving surface, the elastic bodies being dimensioned such that they are in an elastically deformed state in all operating states of the motor housing portion occurring during operation of the refrigerant compressor.

4. The refrigerant compressor according to claim 2 , wherein the supports are arranged running around the stator and support the stator at a plurality of locations on opposite sides of the rotor axis relative to the stator-receiving surface of the motor housing portion.

5. The refrigerant compressor according to claim 2 , wherein the elastic bodies are positioned relative to one another by a band material positioning them relative to one another and running around the stator.

6. The refrigerant compressor according to claim 5 , wherein the elastic bodies are formed into the band material.

7. The refrigerant compressor according to claim 5 , wherein the band material is in the form of a ring-like clasp with open ends.

8. The refrigerant compressor according to claim 2 , wherein the elastic bodies have flank regions running at an acute angle to the outer side of the stator and/or to the stator-receiving surface between foot regions and support regions, one of which abuts against the outer side of the stator and the other of which abuts against the stator-receiving surface.

9. The refrigerant compressor according to claim 2 , wherein the elastic bodies are successively formed into a spring-elastic band material such that successive support regions abut against an outer side of the stator or against the stator-receiving surface and successive foot regions abut against the stator-receiving surface or the outer side of the stator.

10. The refrigerant compressor according to claim 2 , wherein the elastic bodies are located between edge regions arranged peripherally around the stator, and the support regions are connected to the edge regions by means of flank regions running at an acute angle to the outer side of the stator and/or to the stator-receiving surface.

11. The refrigerant compressor according to claim 10 , wherein, on the one hand, the support regions abut against the outer side of the stator or the stator-receiving surface and, on the other hand, the edge regions abut against the stator-receiving surface or the outer side of the stator.

12. The refrigerant compressor according to claim 2 , wherein the supports are formed from a spring-elastic material.

13. The refrigerant compressor of claim 12 , wherein the spring-elastic material is spring steel.

14. The refrigerant compressor according to claim 2 , wherein one of the supports is positioned in respect of its position in the motor housing portion by a step adjoining the stator-receiving surface.

15. The refrigerant compressor according to claim 2 , wherein the compressor unit is configured as a spiral compressor.

16. The refrigerant compressor according to claim 2 , wherein the spring-elastic material is spring steel.

17. The refrigerant compressor of claim 1 , wherein the overall housing has a first cover and a second cover, between which a housing sleeve extends, which has the motor housing portion and the compressor housing portion in which the compressor unit is provided, and wherein at least one contact insert for guiding electrical lines into the overall housing is provided in at least one of the first and second covers, and wherein the housing sleeve extends between the first cover and the second cover as one piece.

18. The refrigerant compressor according to claim 17 , wherein all electrical lines guided into the overall housing are guided by means of at least one contact insert in at least one of the covers of the overall housing.

19. The refrigerant compressor according to claim 17 , wherein the housing sleeve has a cylindrical shape.

20. The refrigerant compressor of claim 19 , wherein the housing sleeve has a circular-cylindrical shape.

21. The refrigerant compressor according to claim 17 , wherein the compressor housing portion has a cylinder housing with a cylinder head.

22. The refrigerant compressor according to claim 21 , wherein the cylinder head has a cylinder head lower part arranged on the cylinder housing, which cylinder head lower part in turn carries a cylinder head upper part which closes off the cylinder head lower part and has at least one outlet chamber integrated therein, and wherein in either the cylinder head upper part or in at least one of the first and second covers, refrigerant passages are arranged which guide refrigerant into the overall housing.

23. The refrigerant compressor according to claim 2 , wherein said compressor is a two-stage compressor, and in that an outlet chamber for medium pressure and an outlet chamber for high pressure are provided in a cylinder head upper part.

24. The refrigerant compressor according to claim 17 , wherein the refrigerant compressor is configured for CO2 as refrigerant.

25. The refrigerant compressor according to claim 1 , wherein the spacer element is a band material.

26. The refrigerant compressor according to claim 25 , wherein the band material has ends spaced apart from one another which tend to widen in the radial direction so that sheet-metal elements thereof automatically abut against the stator-receiving surface and are fixed by frictional engagement.

27. The refrigerant compressor according to claim 1 , wherein the spacer element is inserted into the stator-receiving surface without material removal of the stator-receiving surface.

Assignees

• Bitzer Kuehlmaschinenbau Gmbh

Inventors

• Friedrich Axel
• Becker Andreas

Classifications

• F04B27/12

  having plural sets of cylinders or pistons · CPC title

• F04B27/1081

  Casings, housings · CPC title

• F04B25/04

  having cylinders coaxial with, or parallel or inclined to, main shaft axis · CPC title

• H02K1/185

  to outer stators · CPC title

• F04B35/04 Primary

  the means being electric · CPC title