阅读说明：本技术 压缩机模块以及电动制冷压缩机 (Compressor module and electric refrigeration compressor ) 是由 比约恩·法格里 布迪·里纳尔迪 丹尼斯·里马 皮埃尔·施密特 于 2019-08-21 设计创作，主要内容包括：本发明涉及压缩机模块(10),其具有基本上罐状的压缩机壳体(12),压缩机壳体具有壳体底部(14)和壳体壁(16),壳体壁具有用于经压缩的制冷剂(F)的出口(32),并且压缩机模块具有分离装置(34),分离装置用于分离出与制冷剂(F)混合的润滑剂(S),其中,分离装置(34)被引入到压缩机壳体(12)的高压腔室(30)中,其中,分离装置(34)具有空心柱体式的腔室壁(36),腔室壁形成了在流动技术上与出口(A)连接的分离腔室(38),并且其中,在分离腔室(38)中容纳有分离器(40)因而形成环形空间(42)。此外,本发明还涉及机动车辆的用于压缩制冷剂(K)的电动制冷压缩机(2),其具有这种压缩机模块(10)。(The invention relates to a compressor module (10) having a substantially tank-shaped compressor housing (12) having a housing base (14) and a housing wall (16) having an outlet (32) for compressed refrigerant (F), and having a separating device (34) for separating lubricant (S) mixed with the refrigerant (F), wherein the separating device (34) is introduced into a high-pressure chamber (30) of the compressor housing (12), wherein the separating device (34) has a hollow-cylindrical chamber wall (36) which forms a separating chamber (38) which is fluidically connected to the outlet (A), and wherein a separator (40) is accommodated in the separating chamber (38) so as to form an annular space (42). The invention further relates to an electric refrigeration compressor (2) for a motor vehicle for compressing a refrigerant (K), comprising such a compressor module (10).)

1. Compressor module (10) having a substantially tank-shaped compressor housing (12) with a housing bottom (14) and a housing wall (16) with an outlet (32) for compressed refrigerant (F), and having a separating device (34) for separating lubricant (S) mixed with refrigerant (F),

-wherein the separation device (34) is introduced into a high pressure chamber (30) of the compressor housing (12),

-wherein the separating device (34) has a hollow-cylindrical chamber wall (36) which forms a separation chamber (38) in flow connection with the outlet (A), and

-wherein a separator (40) is accommodated in the separation chamber (38) thus forming an annular space (42).

2. Compressor module (10) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the separating device (34) is formed in one piece.

3. Compressor module (10) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the outlet (A) forms a receptacle for the separating device (34).

4. Compressor module (10) according to one of claims 1 to 3,

it is characterized in that the preparation method is characterized in that,

the separator (40) protrudes from the separation chamber (38) in the direction of a central axis (M) of the separation device (34), wherein the separator (40) has a guide contour (48) on the outside in a region (46) protruding from the separation chamber (38) for fitting the separation device (34) in the outlet (32).

5. Compressor module (10) according to one of claims 1 to 4,

it is characterized in that the preparation method is characterized in that,

in order to hold the separating device (34), in particular in a rotationally fixed manner, in the outlet (32), the separator (40) has a radially outwardly protruding holding contour (66) in the region (46) of the outlet chamber (38), which is accommodated in a seat (68) of the outlet (32) corresponding to the holding contour (66).

6. Compressor module (10) according to one of claims 1 to 5,

it is characterized in that the preparation method is characterized in that,

the chamber wall (36) has an inlet opening (45) for fluidically coupling the separation chamber (38) with the high-pressure chamber (30).

7. Compressor module (10) according to claim 6,

it is characterized in that the preparation method is characterized in that,

the inlet opening (45) opens into the separation chamber (38) radially offset with respect to the center axis (M) of the separation device (34) and/or is formed in an elongated manner in the direction of the center axis (M) of the separation device (34).

8. Compressor module (10) according to claim 6 or 7,

it is characterized in that the preparation method is characterized in that,

the inlet opening (45) is directed towards the housing bottom (14).

9. Compressor module (10) according to any one of claims 1 to 8

It is characterized in that the preparation method is characterized in that,

the end of the chamber wall (36) facing away from the outlet (32) is inserted into a receptacle (58) of the compressor housing (12) connected to a lubricant reservoir (44).

10. Compressor module (10) according to one of claims 1 to 9,

it is characterized in that

Has a recess (60) in the chamber wall (36) for receiving a rotation prevention element (64).

11. Compressor module (10) according to claim 10,

it is characterized in that the preparation method is characterized in that,

the rotation prevention element (64) is introduced into a receptacle (58) connected to the lubricant reservoir (44).

12. Electric refrigeration compressor (2) of a motor vehicle for compressing a refrigerant (F), having a compressor module according to any one of claims 1 to 11 and a motor module (4) having an electric motor (5).

Technical Field

The invention relates to a compressor module having a substantially tank-shaped compressor housing with a housing bottom and a housing wall with an outlet for compressed refrigerant, and having a separating device for separating lubricant contained in a fluid. The invention also relates to an electric refrigeration compressor having such a compressor module.

Background

In motor vehicles, air conditioning systems are usually installed which can cool the vehicle interior in accordance with the type of booster refrigerator. Plants of this type in principle have a circuit in which a refrigerant, for example R-134a (1,1,1, 2-tetrafluoroethane) or R-774 (CO), is guided₂). In operation, the refrigerant is compressed by means of a (refrigeration) compressor or booster, which leads to an increase in the pressure and temperature of the refrigerant. In particular, the compressor is operated by an electric motor.

Inside the compressor, there is also a lubricant, which in operation mixes with the gaseous refrigerant. A lubricant, in particular oil, is used to reduce the occurring friction which is generated in the compressor during operation between the first compressor element and the second compressor element on the high-pressure side which is mounted in a fixed manner. In addition, the lubricant fulfills a sealing function, so that possible (refrigerant) leakages between the compressor part elements are largely reduced or completely avoided, which increases the efficiency of the refrigeration compressor.

In the compressor and there in its (compressor) housing, in the flow direction, a compressor part, which is provided for conveying the fluid formed by means of the lubricant and the refrigerant from the inlet on the low-pressure side to the outlet on the high-pressure side and for compressing the fluid, a high-pressure chamber (supercharging chamber) and a separating device are arranged in succession one behind the other. In the separating device, the lubricant is separated from the refrigerant, so that the separated lubricant is returned or can be returned to the compressor, and the refrigerant, which contains as little lubricant as possible, is led further into the refrigerant circuit via the outlet of the separating device.

The separating device is in particular integrated into the compressor housing. Thus, at least one chamber wall is formed by the compressor housing, which encloses the separation chamber of the separation device.

A screw compressor is known, for example, from DE 69823117T 2, in which the rear housing delimits an oil separating chamber.

Furthermore, a compressor with an oil separator having a cylindrical bore in which a separating tube is accommodated is known from US 2006/0065012 a 1. The opening is arranged in the wall of the rear housing.

However, in order to produce a compressor housing with such an integrated separating device, relatively complex (cast) mold geometries are required, and in particular, slides are additionally required. On this basis, the compressor housing, and thus the compressor, is relatively complex and expensive to manufacture.

Furthermore, pressure pulsations, i.e. a pressure profile that varies over time, can occur in the compressor, which are caused in particular by the compressed fluid being discharged in a pulsating manner (intermittently) into the high-pressure chamber. This pressure pulsation may also continue, for example, in a part of the refrigerant circuit downstream of the high-pressure chamber in terms of flow, and may, for example, disadvantageously lead to noise generation in the refrigerant circuit.

Disclosure of Invention

The object of the invention is to specify a particularly suitable compressor module and an electric refrigeration compressor having such a compressor module. In particular, the compressor housing should be able to be produced cost-effectively and/or should avoid pressure pulsations.

With regard to the compressor module, according to the invention, this object is achieved by the features of claim 1. With regard to the electric refrigeration compressor, according to the invention, this object is achieved by the features of claim 12. Advantageous embodiments and improvements are the subject matter of the dependent claims.

For this purpose, the compressor module has a substantially pot-shaped compressor housing with a housing base and a housing wall. The compressor housing is also referred to as a compressor head housing. Furthermore, the housing wall has an outlet for compressed refrigerant. The compressor module also comprises a separating device (lubricant separator) for separating out lubricant mixed with the refrigerant. The separating device is introduced into a high-pressure chamber (supercharging chamber) of the compressor housing.

The separating device has a hollow-cylindrical, in particular tubular, chamber wall which forms a separating chamber which is fluidically connected to the outlet. Thus, the chamber wall separates the separation chamber from the high pressure chamber. The separating apparatus also has a separator that is received in the receiving chamber thereby forming an annular space. Expediently, the central axis of the separating device extends parallel to the housing base, in particular in the radial direction of the housing base.

The separator is preferably likewise of hollow-cylindrical design, through which the compressed refrigerant flows to the outlet. The separator is preferably arranged coaxially with the chamber wall.

The separating device is designed as a separate component which is or can be introduced into the high-pressure chamber. Thus, the separating device, in particular the chamber wall thereof, is configured not to be coherent with the compressor housing or not integrated therein. On this basis, the tool for producing the compressor housing can be implemented and embodied relatively simply. In particular, no slides are required to form the separation chamber. The cost of manufacturing the compressor housing is advantageously reduced.

For example, a mixture of refrigerant and lubricant (also referred to collectively as a fluid) is fed from a compressor section outlet of the compressor section in a pulsed manner (intermittently) into the high-pressure chamber, caused by operation, in particular via a valve. Accordingly, in the high-pressure chamber of the refrigerant circuit and also in the (structural) part of the refrigerant circuit downstream of the high-pressure chamber with respect to flow, there is a time-dependent pressure profile, which is referred to below as pressure pulsation. This may disadvantageously cause noise generation in the refrigerant circuit, for example. Such pressure pulsations are avoided or at least reduced by the volume into which the fluid is released in a pulsating manner being made larger. Since the separating device is introduced into the high-pressure chamber instead of being integrated into the housing bottom, the corresponding casting geometry of the separating chamber is omitted. In particular, therefore, with the installation space of the compressor housing remaining the same, an additional space (additional volume) is formed between the separating device and the housing bottom, as a result of which pressure pulsations are reduced. Thus, pressure pulsations in the high-pressure chamber are advantageously reduced and, in particular, the accompanying noise generation is reduced.

The lubricant is suitably a (lubricating) oil, wherein the term "oil" is not to be understood restrictively as mineral oil. Instead, fully or partially synthetic oils, such as silicone oils, or other oily liquids, such as hydraulic fluids or cooling lubricants, may also be used. In this respect, the separating device is also referred to as an oil separator.

With the aid of the separating device, the lubricant is separated from the refrigerant or from the fluid in accordance with the type of centrifugal separator (cyclone). The fluid flowing into the separation chamber is guided along the separator in a spiral (cyclone-like) manner in the cylindrical separation chamber. In this case, the centrifugal force acting on the mixture of refrigerant and lubricant acts as a separating mechanism.

According to an advantageous embodiment, the separating device is formed in one piece. In other words, the chamber wall and the separator are constructed coherent (integral). In a suitable manner, the separating device is produced relatively cost-effectively by means of an injection molding method, preferably from plastic. Such an injection moulding method also enables relatively complex profiles to be formed on the separating apparatus, in particular for improved (cyclonic) separation. For example, a spiral-shaped guide for the fluid can be formed on the chamber wall, which extends into the separation chamber.

According to a suitable development, the outlet forms a (plug-in) receptacle for the separating device. In particular, the separating device is inserted into the high-pressure chamber through the outlet during assembly. In other words, the separating device is an insert. Here, the separating device is placed in the outlet on the end side.

For this purpose, the separator projects in the direction of the central axis of the separating device from the separating chamber according to an advantageous development. The separator has a guide contour on the outside in the region of the outlet opening of the separating device. For example, the guide contour is configured with a number of ribs, so that the separating device remains centered during assembly when passing through the outlet and is thus prevented from being misaligned, in particular from tilting relative to the provided assembly direction.

In addition, the separator is expediently widened in this region projecting out of the separation chamber, so that the outer wall of the separator is formed on the inner wall of the outlet. The outlet is preferably circular in cross section. Correspondingly, the separator widens conically so that its outer diameter is equal to the inner diameter of the outlet.

In a suitable embodiment, the chamber wall has an inlet opening for fluidically coupling the separation chamber to the high-pressure chamber. In an advantageous embodiment, the inlet opening opens into the separating chamber radially offset from the central axis of the separating device. In addition or alternatively, the inlet opening is configured as a long hole in the direction of the central axis of the separating device. Due to the radial offset of the inlet openings, the compressed fluid flows tangentially into the annular space formed between the separator and the chamber wall. The fluid is thus guided in a targeted manner only on one side of the separator, undesired vortex formation is avoided, and the lubricant is separated off better. In particular, the flow cross section formed by the clear width of the inlet openings is adapted to the supply quantities occurring during operation by means of the long-bore-like configuration in the direction of the central axis even in the case of a tangential inflow of the fluid into the annular space (and therefore even in the case of a correspondingly radially offset arrangement of the inlet openings).

In an advantageous embodiment, the access opening is directed toward the housing bottom. In this way, the inlet opening of the chamber wall is not opposite the compressor section outlet, i.e. the inlet opening of the chamber wall faces away from the compressor section outlet, from which the compressed fluid leaves the compressor section and flows in particular in a pulsating manner into the high-pressure chamber. Hereby, a relatively even inflow of fluid into the separating device is achieved.

In a suitable embodiment, the separator has a radially outwardly projecting retaining contour in the region of the outlet of the separation chamber. Preferably, the retaining contour is arranged on the end side, that is to say on the end of the separator facing away from the separation chamber. The retaining contour is here received in a corresponding seat of the outlet. For example, the retaining profile is configured as a hook-shaped projection which rises in a direction perpendicular to the central axis of the separating apparatus. In this case, a wall of the bearing seat oriented perpendicularly to the central axis of the separating device forms a first abutment (first shoulder) with respect to a direction along the central axis of the separating device. The wall portion oriented parallel to the central axis forms a second abutment (second shoulder) for the retaining profile to prevent the separating apparatus from twisting about its central axis, i.e. in the circumferential direction of the separating apparatus.

In addition, the separating device is inserted into the compressor housing with a press fit. The press fit is formed in a receptacle connected to the lubricant reservoir, in particular by means of the chamber wall, and additionally or alternatively by means of the separator and the outlet. By means of the press fit, twisting is already avoided or at least the risk is significantly reduced.

The end of the chamber wall facing away from the outlet is expediently inserted into a receptacle of the compressor housing connected to the lubricant reservoir.

In a suitable embodiment, the chamber wall has a recess for receiving the rotation prevention element. Preferably, the recess is arranged on the end of the chamber wall facing away from the outlet. It is thus advantageously possible to introduce the rotation prevention element into a receptacle connected to the lubricant reservoir. Additionally, the clearance is used as an orientation aid during assembly. Alternatively or additionally, a rotation prevention device is provided and set up to prevent the rotation of the separating device by means of a retaining contour arranged on the separator. Thus, the accommodation portion satisfies a dual function. The rotation prevention means is configured, for example, as a pin or screw element. In particular, the rotation prevention element is introduced during assembly into a corresponding through-opening of a receptacle connected to the lubricant reservoir and into a recess of the chamber wall aligned with the through-opening. In any case, the separating apparatus is thus fixed against rotation relative to the housing.

In a suitable embodiment, an electric refrigeration compressor for compressing a refrigerant of a motor vehicle has a compressor module according to one of the variants described above. Furthermore, the electric refrigeration compressor has a motor module with an electric motor.

The compressor part is in particular supported in the compressor housing. The compressor section is implemented in a suitable manner as a so-called scroll compressor. This works in a manner similar to a displacement pump, in which the movable scroll is driven eccentrically, in particular by means of an electric motor, relative to the stationary scroll and the fluid is pressurized there. The scroll members are typically embodied herein as spiral or scroll pairs nested within one another. One of the screws is stationary relative to the compressor housing and is at least partially inserted into a second screw which is driven along a rail by means of an electric motor. A movement along the rail is to be understood here to mean, in particular, an eccentric circular movement path, wherein the second screw does not rotate on its own axis. Thus, at each orbiting movement, two substantially crescent-shaped refrigerant chambers are formed between the screws, the volume of which is reduced (compressed) during the movement. The refrigerant is discharged into the high pressure chamber through an outlet in the stationary scroll.

Drawings

Embodiments of the present invention are explained in more detail below with reference to the drawings. Wherein:

fig. 1 shows an electric refrigeration compressor in longitudinal section, with a motor module with an electric motor and with a compressor module;

fig. 2 shows a compressor housing of a compressor module in a perspective view, wherein a housing wall of the compressor housing has an outlet for compressed refrigerant and wherein the outlet forms a receptacle for a separating device;

fig. 3 shows a compressor housing in a perspective view, in which a separating device is introduced, wherein the compressor housing is shown in transparency;

fig. 4 shows a compressor housing in a perspective top view in section on an enlarged scale, with a receptacle in which the separating device is inserted in a fixed manner relative to the housing;

fig. 5 shows a separating device in a perspective view, which has a cylindrical chamber wall forming a separation chamber and a separator introduced into the separation chamber;

FIG. 6 shows the separator device in cross-section with an annular space formed between the separator and the chamber wall;

fig. 7 shows an alternative embodiment of the separating device in a perspective view, wherein the separator has a retaining contour in the region of the projection of the separating chamber, and

fig. 8a, b show a top view or a section of an outlet in a perspective view, in which a separating device according to the alternative embodiment of fig. 7 is accommodated, wherein the retaining contour of the separator, which is arranged in the region of the projecting separating chamber, is accommodated in a seat of the outlet.

Corresponding parts and dimensions have the same reference numerals throughout the drawings.

Detailed Description

The electric refrigeration compressor 2 shown in fig. 1 (also referred to below simply as compressor 2) is preferably mounted or can be mounted as an electric refrigeration compressor 2 in a refrigerant circuit, not shown in detail, of an air conditioning system of a motor vehicle. The compressor 2 is constructed in a modular manner. The compressor therefore comprises a motor module 4 having: an electric motor 5, which in turn comprises a rotor 6 and a stator 8; and has an electronics magazine 9 which accommodates electronics, not shown in detail, for driving the electric motor 5. Further, the compressor 2 comprises a compressor module 10 which is spliced together with the motor module 4.

The compressor module 10 has a substantially pot-shaped compressor housing 12 (housing 12) with a housing base 14 and a housing wall 16. Supported in the compressor housing 12 is a compressor part 18, which is in driving connection with the electric motor 5 of the motor module 4. The compressor part 18 has a first compressor part element 20 which is stationary relative to the compressor housing 12 and a second movable compressor part element 22 which is embedded in the stationary first compressor part element. The compressor section 18 is embodied here as a scroll compressor.

Within the compressor 2 there is a lubricant S which serves to lubricate the compressor part 18 and fulfils a sealing function, so that leakage between the compressor part elements 20 and 22 is avoided. As a result of the operation, the refrigerant K compressed by the compressor section and the lubricant S are mixed to form the fluid F. Fluid F flows into compressor section cavity 26 through compressor section inlet 24 on the low pressure side of compressor section 18. There, the fluid F is compressed (pressurized), wherein the compressor section 18 functions in a manner similar to a displacement pump. Subsequently, the fluid F flows out of the compressor section 18 through the compressor section outlet 28 on the high pressure side into the high pressure chamber 30.

The direction in the schematic drawing is indicated by R or a with respect to the radial direction of the compressor housing 12 and in the direction of the compressor section 18 perpendicular to the axial direction of the housing bottom 14.

Fig. 2 and 3 show the compressor housing 12, the housing wall 16 of which has a tunnel-like outlet 32 for the refrigerant K compressed by means of the compressor section 18. Here, the outlet 32 forms a receptacle for a separating device 34 as shown in fig. 5 and 6.

The separation device 34 has a hollow cylindrical (tubular) chamber wall 36. Which forms a separation chamber 38 which is fluidically connected to the outlet 32. In other words, the chamber wall 36 delimits the separation chamber 38. A hollow cylindrical separator 40 is arranged coaxially in the separation chamber 38, with an annular space 42 (annular gap) being formed between the separator 40 and the chamber wall. In addition, the separating device 34 is formed in one piece. In other words, the chamber wall and the separator 40 are formed in one piece and are produced, for example, by means of an injection molding method as a plastic insert for plug assembly.

The separating device 34 serves to separate out the lubricant S contained in the fluid F into the lubricant reservoir 44 in the type of a centrifugal separator. The fluid F flowing into the separating chamber 38 via the inlet opening 45 of the chamber wall 36 flows in the direction of the lubricant reservoir 44 in the separating chamber 38 in a spiral (cyclone-like) manner around the separator 40, wherein the centrifugal forces acting on the refrigerant K contained in the fluid F and on the lubricant S contained in the fluid F act as a separating mechanism. Subsequently, the refrigerant K separated from the lubricant S flows out into the refrigerant circuit via the hollow-cylindrical separator 40 and the outlet 32, which is correspondingly indicated by arrows.

The separator 40 has a region 46 which projects out of the separation chamber 38 in the direction of the central axis M of the separation device 34, i.e. in the axial direction of the separation device. On the outside, this region 46 has a guide contour 48 for fitting the separating device 34 in the outlet 32, which guide contour 48 is thus configured as a rib extending in the direction of the central axis. By means of the guide contour 48, the separating device 34 is centered in the outlet 32 during introduction during assembly and is prevented from tilting relative to the provided assembly direction. Furthermore, the region 46 widens conically, so that the outer diameter of the separator 40 matches the inner diameter of the outlet 32.

The inlet opening 45 of the chamber wall 36 opens into the separation chamber 38 radially offset from the center axis M of the separation device 34. In addition, the inlet opening 45 is configured in the form of an elongated hole in the direction of the center axis M of the separating device 34. Due to the radially offset inlet openings 45, the compressed fluid F flows tangentially into the annular space 42 formed between the separator 40 and the chamber wall 36, so that the fluid F is guided in a targeted manner only on one side of the separator 40 and undesired vortex formation is avoided. In particular, the flow cross section formed by the clear width of the inlet opening 45 is matched to the supply quantity occurring during operation of the fluid F by the oblong configuration in the direction of the central axis M even in the case of a radially offset arrangement of the inlet openings 45.

The separated lubricant S is returned in a manner not further shown to the stationary compressor part element 20 and further to the bearings (rolling or ball bearings) 50 of the electric motor 5 for lubricating and/or cooling thereof.

Furthermore, the housing bottom 14 has an annular wall 52. The annular wall divides the space enclosed by the stationary compressor part element 20 and by the compressor housing 12 into an inner annular region 54 and an outer annular region 56. The high-pressure chamber 30, which is also referred to as a plenum chamber, is formed by an inner annular region 54 (delimited by the housing bottom 14), an annular wall 52 and a compressor part element 20 which rests on the annular wall 52.

The separation device 34 is introduced into the high pressure chamber 30. The high-pressure chamber 30 is thus fluidically coupled to the separating chamber 38 by means of the inlet opening 45. The separating device 34 is arranged at a distance from the housing bottom 14, wherein the central axis M of the separating device extends parallel to the housing bottom 14, i.e. in the radial direction R. Due to the spatial area between the separating device 34 and the housing bottom 14, pressure pulsations of the fluid F are reduced. The inlet opening 45 is directed toward the housing bottom 14 and thus faces away from the compressor part outlet 28 of the compressor part 18, from which compressor part outlet 28 the compressed fluid F flows out of the compressor part or is conveyed into the high-pressure chamber 30.

The end of chamber wall 36 facing away from outlet 32 is inserted into a receptacle 58 of compressor housing 12, which is domed relative to housing base 14 and has lubricant reservoir 44.

On the end facing away from the outlet 32, i.e. in the end of the chamber wall inserted into the receptacle 58, the chamber wall 36 has a recess 60 for receiving an anti-rotation element 64. The rotation prevention element is designed as a pin and is introduced into a receptacle 58 connected to the lubricant reservoir 44.

Fig. 4 shows, on an enlarged scale, the recess 60 in alignment with a through-opening 62 introduced into the receptacle 58 for receiving an anti-rotation element 64 designed as a pin. The separating apparatus 34 is thus secured against rotation relative to the housing by means of the anti-rotation portion 64.

Furthermore, the separating device 34 is inserted into a receptacle 58 connected to the lubricant reservoir 44 and forms a press fit in the outlet in its widened region 46.

Fig. 7 shows an alternative embodiment of the separating device 34. The separating apparatus 34 has the features shown above, in addition to those described below, and therefore these features will not be described further. The separator 40 has a radially outwardly projecting retaining contour 66 in the region 46 which projects beyond the separation chamber 38. The retaining contour is configured here as two hook-shaped projections arranged opposite one another, which each rise in a direction perpendicular to the central axis M of the separating device 34. Fig. 8a and 8b show an alternative embodiment of the separating device 34 accommodated in the outlet 32, wherein only one of the projections is shown in the section of fig. 8b, and wherein the projection is accommodated in a corresponding seat 68 of the outlet 32. In this case, a wall of the seat 68 oriented perpendicularly to the center axis M forms a first abutment 70 (first shoulder 70) with respect to a direction along the center axis M. Additionally, the seat 68 is not formed along the entire circumference of the outlet 32, here along half of the circumference. Thus, the socket 68 has two walls extending at least sectionally in a plane parallel to the central axis. These wall portions thus each form a second abutment 72 (second shoulder 72) for the retaining contour 66 configured as a projection to prevent the decoupling device 34 from twisting about its central axis M.

In a manner not shown in detail, this configuration for preventing the decoupling device 34 from twisting is provided and set up either instead of the anti-twisting element 64 introduced into the receptacle 58 or in addition to the anti-twisting element 64 introduced into the receptacle 58.

The present invention is not limited to the above-described embodiments. On the contrary, other variants of the invention can also be derived therefrom by the person skilled in the art without departing from the subject matter of the invention. In particular, all individual features described in connection with the embodiments may also be combined with one another in other ways without departing from the subject matter of the invention.

List of reference numerals

2 electric refrigerating compressor

4 motor module

6 rotor

5 electric motor

8 stator

9 electronic device box

10 compressor module

12 compressor shell

14 bottom of the shell

16 casing wall

18 compressor section

20 first compressor section element

22 second compressor section element

24 compressor section inlet

26 compressor chamber

28 compressor section outlet

30 high pressure chamber

32 outlet

34 separating device

36 chamber wall

38 separation chamber

40 separator

42 annular space

44 lubricant reservoir

45 access opening

46 region of the separator

48 guide profile

50 rolling bearing

52 annular wall

54 annular region inside

56 annular region outside

58 receiving part

60 hollow part

62 through part

64 anti-twist part

66 retention profile

68 bearing seat

70 first abutting part

72 second abutting part

Axial direction A

F fluid

K refrigerant

Central axis of M separating device

R radial direction

S lubricant