Semi-sealed refrigerant compressor

Abstract

The invention relates to a semi-sealed refrigerant compressor, comprising a compressor unit and an electric motor, an overall housing having a motor housing section for the electric motor and a compressor housing section for the compressor unit, the semi-sealed refrigerant compressor comprises a refrigerant path leading to a suction side of the compressor unit from a suction interface on the main shell and a refrigerant path leading to a pressure side of a pressure interface of the compressor unit. The semi-sealed refrigerant compressor is improved in that an inlet is arranged on the motor housing section in a region opposite the compressor housing section, the inlet is used for the refrigerant to be fed to the motor space in the motor housing section, and the inlet is provided with a cover. The cover has an inlet guide element and a filter element for separating particles carried by the refrigerant, thereby avoiding the problem of particles carried by the refrigerant in the refrigerant cycle.

Description

Technical Field

[0001] The present invention relates to a semi-hermetic refrigerant compressor, which comprises a compressor unit, an electric motor and a main casing, wherein the main casing has a motor casing section for the electric motor and a compressor casing section for the compressor unit, and the semi-hermetic refrigerant compressor comprises a refrigerant path from a suction interface on the main casing to the suction side of the compressor unit and a refrigerant path to the pressure side of the pressure interface of the compressor unit. Background Art

[0002] A problem that exists in such semi-hermetic refrigerant compressors is that particles carried by the refrigerant are introduced into the electric motor and, in some cases, also into the compressor unit, where they can cause damage. Summary of the invention

[0003] The object of the present invention is therefore to improve a semi-hermetic refrigerant compressor in such a way that the problem of particles carried by the refrigerant in the refrigerant cycle can be avoided.

[0004] The object in a semi-hermetic refrigerant compressor of the type described in the introduction is achieved according to the invention in that an inlet is arranged on the motor housing section in an area opposite the compressor housing section, said inlet being used for the refrigerant to be supplied to the motor space in the motor housing section, and said inlet is provided with a cover having an inlet guide element and a filter element for separating particles carried by the refrigerant.

[0005] The advantage of the solution according to the invention is that with such a cover having an inlet for the filter element for particles entrained by the refrigerant, the problems mentioned at the outset can be avoided.

[0006] In this case, an advantageous solution provides that the cover bridges the opening of the access opening facing the motor space and thus completely covers it.

[0007] Here, no further description has been given so far regarding the specific structure of the cover.

[0008] An advantageous solution provides that the cover has a frame which holds and fixes the filter element.

[0009] In this case, the frame is preferably designed in such a way that it surrounds the opening of the access opening facing the motor space on the outer side of the opening.

[0010] No further explanation has been given so far regarding the structure of the entry portion.

[0011] An advantageous solution provides that the inlet, in particular via the inlet channel formed by the inlet, causes the refrigerant flow to impinge on the cover in a flow direction directed toward the rotor of the electric motor.

[0012] Such a configuration of the inlet has the advantage that the refrigerant flow directed in this way can be optimally utilized for cooling the electric motor.

[0013] In particular, it is provided that the cover has a flow distributor element as an inlet guide element, which distributes the refrigerant flow through the inlet to a region of the filter element surrounding the flow distributor element in order to allow the refrigerant to enter the motor space with the largest possible cross section and the most uniform possible spatial distribution.

[0014] In this case, in particular, the inlet is designed in such a way that it causes the refrigerant to appear at the flow distributor element, so that the flow distributor element can optimally act on the distribution of the refrigerant flow.

[0015] No further explanation has been given so far regarding the structure of the entry portion.

[0016] An advantageous solution provides that the inlet has an inlet chamber which is provided for receiving particles retained by the filter element, and that the cover bridges the opening of the inlet chamber which faces the motor space.

[0017] Preferably, the inlet chamber is arranged downstream of the inlet portion relative to the inlet channel of the inlet portion and is designed to widen in the radial direction relative to the inlet portion.

[0018] In particular, the inlet chamber itself directly adjoins the filter element and can therefore directly receive particles retained by the filter element.

[0019] In this case, the inlet chamber is preferably provided with a collecting region for particles retained by the filter element, so that the particles do not significantly interfere with the further filtering action of the filter element.

[0020] In this case, the collecting region is preferably arranged at the deepest point in the inlet chamber in the direction of gravity.

[0021] In order to optimally convey the particles, in particular also deflected by the flow distribution element, to the collecting area, it is preferably provided that the cover has a particle guide element as an entry guide element which extends from the flow distribution element into the collecting area of ​​the chamber and thus conveys the particles to the collecting area as efficiently as possible.

[0022] Furthermore, it is preferably provided that the cover has a shielding element as an inlet guide element, which defines a collecting area for particles which are filtered from the refrigerant flow by the filter element and deposited in the collecting area of ​​the inlet chamber.

[0023] It is particularly advantageous here if the shielding element reduces, in particular prevents, the passage of particles deposited in the collecting region of the inlet chamber through a portion of the refrigerant flow.

[0024] No further information has been given so far with regard to the construction of the filter element.

[0025] An advantageous solution provides that the filter element is produced from a wire fabric or a wire knit.

[0026] In this case, a wire fabric or a wire knitted fabric offers the best possibility for designing the filter element with the smallest possible passage opening for the refrigerant in order to filter particles out of the refrigerant in an optimal manner.

[0027] In this case, it is preferably provided that the wire fabric or knitted wire fabric of the filter element extends as far as the frame and is held on the frame.

[0028] No further explanation has been given so far regarding the arrangement of the flow distribution element relative to the filter element.

[0029] It is preferably provided that the flow distribution element is arranged upstream of the filter element in the flow direction and covers the filter element in places.

[0030] It is particularly advantageous here if the flow distributor element is arranged on the filter element and covers the filter element in places, in particular bears against the filter element.

[0031] With regard to the arrangement of the particle deflection element, it is likewise advantageous if the particle deflection element is arranged upstream of the filter element in the flow direction and covers the filter element in places.

[0032] With regard to the particle deflection element, it is also advantageous if the particle deflection element itself bears against the filter element.

[0033] Furthermore, it is also advantageous with regard to the shielding element if the shielding element is arranged upstream of the filter element in the flow direction and covers the filter element in places.

[0034] Here, too, it is advantageous for the arrangement of the shielding element if the shielding element is arranged in contact with the filter element.

[0035] A particularly advantageous solution provides that the flow distribution element and / or the particle deflecting element and / or the shielding element is part of the inlet guide cap.

[0036] In this case, the inlet guide cap can be a separate element which bears against the cover and is in particular connected to the cover.

[0037] In particular, the cover is designed in such a way that it comprises the entry guide cap.

[0038] Alternatively to the provision of a knitted fabric or woven fabric for the filter element, a further solution provides that the filter element is formed by a thin flat material or in particular by a membrane which is held, for example, by a frame.

[0039] In this case, the thin flat material, in particular the film, can already be a porous material.

[0040] A particularly advantageous solution provides that the filter element is formed by passages introduced into a thin flat material, in particular a film.

[0041] Such passages can be introduced in a targeted manner, for example, simply by laser processing into thin flat materials, in particular films.

[0042] In the case of a targeted introduction of the passage into a thin flat material, in particular a film, it is particularly advantageous if the flow distribution element is integrated into the thin flat material, in particular a film.

[0043] By providing fewer or no passages at the location of the flow distribution element, the flow distribution element can be integrated very simply in the membrane.

[0044] Furthermore, the particle deflecting element can also be integrated in a simple manner in thin flat materials, in particular films, by introducing fewer or no passages at the location of the particle deflecting element.

[0045] Furthermore, the shielding element can also be expediently integrated in thin flat materials, in particular films, by also introducing fewer or no passages on the shielding element.

[0046] In order to be able to remove the particles from the inlet chamber, in particular the collecting region of the inlet chamber, it is preferably provided that the inlet chamber is provided with an external inlet opening provided in addition to the inlet, so that the particles can be sucked out or flushed out of the inlet chamber independently of the inlet.

[0047] It is particularly advantageous if the external inlet opening is arranged in the region of the collecting region of the inlet chamber.

[0048] It is particularly advantageous if the external inlet opening opens into the collecting region of the inlet chamber.

[0049] Preferably, the inlet opening is closable by a closing body.

[0050] A further advantageous solution provides that a receiving space adjoins the collecting region of the inlet chamber, said receiving space opening into the cover, so that more space is created by the receiving space for accommodating the particles and the time interval for removing the particles is thus extended.

[0051] Furthermore, the receiving space also enables the following possibility: the receiving space passes through the entire cover and is accessible from the side of the cover facing away from the motor space, thereby providing an enlarged access to the receiving space, which can then be covered or closed, in particular by a closing element that can be fixed to the cover.

[0052] The above description of the solution according to the invention therefore includes in particular the different combinations of features defined by the following consecutively numbered embodiments:

[0053] 1. A semi-hermetic refrigerant compressor, comprising a compressor unit (54) and an electric motor (42), a main housing (10), the main housing having a motor housing section (14) for the electric motor (42) and a compressor housing section (12) for the compressor unit (54), the semi-hermetic refrigerant compressor comprising a refrigerant path from a suction connection (32) on the main housing (10) to the suction side of the compressor unit (54) and a refrigerant path on the pressure side to the pressure connection of the compressor unit (54), wherein an inlet (34) is arranged on the motor housing section (14) in a region opposite to the compressor housing section (12), the inlet being used for refrigerant to be supplied to a motor space (36) in the motor housing section (14), and the inlet (34) being provided with a cover (112), the cover having an inlet guide element (136, 144, 146) and a filter element (118) for separating particles carried by the refrigerant.

[0054] 2. The refrigerant compressor according to embodiment 1, wherein the cover (112) bridges the opening (106) of the inlet portion (104) toward the motor space (36).

[0055] 3. The refrigerant compressor according to embodiment 1 or 2, wherein the cover (112) has a frame (114) for holding and fixing the filter element (118).

[0056] 4. The refrigerant compressor according to embodiment 3, wherein the frame (114) surrounds the opening (106) of the inlet portion (34) toward the motor space (36) on the outside.

[0057] 5. A refrigerant compressor according to any one of the preceding embodiments, wherein the inlet portion (34) causes the refrigerant to hit the cover (112) in a flow direction directed toward the rotor (46) of the electric motor (42).

[0058] 6. A refrigerant compressor according to any one of embodiments 3 to 5, wherein the cover (112) has a flow distribution element (136) as an inlet guide element, which distributes the refrigerant flow passing through the inlet portion (34) to the area of ​​the filter element (118) surrounding the flow distribution element (136).

[0059] 7. A refrigerant compressor according to any one of the preceding embodiments, wherein the inlet portion (34) is designed such that it causes the refrigerant flow to hit the flow distribution element (136).

[0060] 8. A refrigerant compressor according to any one of the preceding embodiments, wherein the inlet portion (34) has an inlet chamber (104), which is configured to accommodate particles blocked by a filter element (118), and a cover (112) bridges an opening (106) of the inlet chamber (104) toward the motor space (36).

[0061] 9. The refrigerant compressor according to embodiment 8, wherein the inlet chamber (104) is provided with a collecting area (122) for particles retained by the filter element (118).

[0062] 10. A refrigerant compressor according to embodiment 8 or 9, wherein the cover (112) has a particle guide element (144) as an entry guide element, which extends from the flow distribution element (136) to the collection area (122) of the entry chamber (104).

[0063] 11. A refrigerant compressor according to any one of embodiments 8 to 10, wherein the cover (112) has a shielding element (146) as an inlet guide element, wherein the shielding element defines a collection area (122) for particles filtered from the refrigerant flow by the filter element (118) and deposited in the collection area (112) of the inlet chamber (104).

[0064] 12. A refrigerant compressor according to embodiment 11, wherein the shielding element (146) reduces, in particular prevents, the flow of particles deposited in the collection area (122) of the inlet chamber (104) through a portion of the refrigerant flow.

[0065] 13. The refrigerant compressor according to any one of the preceding embodiments, wherein the filter element (118) is made of a metal wire fabric or a metal wire knitted fabric.

[0066] 14. The refrigerant compressor according to embodiment 13, wherein the wire fabric or wire knitting of the filter element (118) extends up to the frame (114) and is held on the frame.

[0067] 15. The refrigerant compressor according to any one of embodiments 6 to 14, wherein the flow distribution element (136) is arranged before the filter element (118) in the flow direction and partially covers the filter element.

[0068] 16. The refrigerant compressor according to any one of embodiments 6 to 15, wherein the particle guide element (144) is arranged in the flow direction before the filter element (118) and partially covers the filter element.

[0069] 17. A refrigerant compressor according to any one of embodiments 6 to 16, wherein the shielding element (146) is arranged before the filter element (118) in the flow direction and partially covers the filter element.

[0070] 18. A refrigerant compressor according to any one of embodiments 6 to 17, wherein the flow distribution element (136) and / or the particle deflection element (144) and / or the shielding element (146) are components entering the guide hood.

[0071] 19. The refrigerant compressor according to embodiment 18, wherein the cover element (112) includes an inlet guide cover (128).

[0072] 20. The refrigerant compressor according to any of the preceding embodiments, wherein the filter element (118) is formed by a thin flat material (162).

[0073] 21. The refrigerant compressor according to embodiment 20, wherein the filter element (118) is formed by an opening (164) introduced into a thin flat material (162).

[0074] 22. The refrigerant compressor according to embodiment 19 or 20, wherein the flow distribution element (136) is integrated into the thin flat material (162).

[0075] 23. The refrigerant compressor according to embodiments 19 to 22, wherein the particle deflection element (144) is integrated into the thin flat material (162).

[0076] 24. A refrigerant compressor according to any one of embodiments 19 to 23, wherein the shielding element (146) is integrated into the thin flat material (162).

[0077] 25. A refrigerant compressor according to any one of embodiments 8 to 24, wherein the inlet chamber (104) is provided with an external inlet opening (148) provided in addition to the inlet portion (34).

[0078] 26. A refrigerant compressor according to embodiment 25, wherein the external inlet opening (148) is arranged in the region of the collecting area (122) of the inlet chamber (104).

[0079] 27. A refrigerant compressor according to embodiment 26, wherein the external inlet opening (148) opens into the collecting area (122) of the inlet chamber (104).

[0080] 28. The refrigerant compressor according to embodiment 26 or 27, wherein the external inlet opening (147) can be closed by a closing body (152).

[0081] 29. A refrigerant compressor according to any one of embodiments 8 to 28, wherein the receiving space (154) is connected to the collecting area (122) of the inlet chamber (104), the receiving space in particular passing through the cover (24) and in particular accessible from the side of the cover (24) facing away from the motor space (36).

[0082] 30. The refrigerant compressor according to embodiment 27, wherein the receiving space (154) can be closed by a closing element (158) which can be fixed to the cover (24).

[0083] Other characteristics and advantages of the invention are the object of the following description and illustration of several embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] In the figure:

[0085] Figure 1 A side view showing a semi-hermetic refrigerant compressor according to the present invention;

[0086] Figure 2 shows a longitudinal section through a refrigerant compressor;

[0087] Figure 3 A schematic diagram of a first embodiment with a cover is shown in Figure 2 An enlarged schematic diagram of area A in FIG.

[0088] Figure 4 A perspective view showing a section through half of a cover enclosing a motor space with a first embodiment of a cover according to the invention;

[0089] Figure 5 An entry guide shield according to a first embodiment of a cover according to the present invention is shown;

[0090] Figure 6 A top view of an inlet guide hood of a first embodiment of a cover element according to the invention is shown in the flow direction;

[0091] Figure 7shows a top view of a first embodiment of a cover according to the invention in a direction opposite to the flow direction;

[0092] Figure 8 Shows something like Figure 3 a schematic diagram of a second embodiment of a cover according to the invention with an inlet opening towards the outside of the collecting area of ​​the access chamber;

[0093] Fig. 9 Shows something like Figure 8 A schematic diagram of a third embodiment of a cover according to the invention with a receiving space for particles passing through the cover connected to the collecting area of ​​the inlet chamber; and

[0094] Fig.10 A fourth embodiment of a cover according to the invention is shown in a top view. DETAILED DESCRIPTION

[0095] exist Figure 1 The embodiment of the semi-hermetic refrigerant compressor according to the invention shown in FIG. 1 comprises an overall housing 10 including a compressor housing section 12 and a motor housing section 14 .

[0096] The overall housing 10 is formed, for example, by a housing jacket 16 which includes both the compressor housing section 12 and the motor housing section 14 and is closed on the compressor housing section 12 side by a cover 22 and on the motor housing section 14 side by a cover 24 .

[0097] like Figure 2 As shown in the figure, a suction gas interface, which is generally indicated by 32 and is configured as a suction gas valve, is provided on the cover 24 that closes the motor housing section 14. The suction gas extracted through the suction gas interface is supplied to the motor space 36 through the inlet 34. In the motor space, the electric motor, which is generally indicated by 42, is cooled by the suction gas flowing through the motor space 36. The electric motor includes a stator 44 and a rotor 46 that can rotate about an axis 48. The suction gas is then supplied to the compressor housing section 12 through a suction gas channel 52. The compressor unit 54 is arranged in the compressor housing section 12, and the compressor unit is constructed, for example, as a piston compressor, which has a plurality of cylinders 561, 581, and the cylinders are usually closed by a cylinder head 62, wherein the cylinders 561, 581 extract and compress the refrigerant flowing into the cylinder head 62 through the suction gas channel 52, and the cylinders convey the compressed refrigerant to the pressure gas channel 64 through the cylinder head 62, and the pressure gas from the pressure gas channel enters the pressure gas interface 66, for example, which is constructed as a pressure gas valve.

[0098] In order to drive the compressor unit 54 , a drive shaft 74 extends in the drive space 72 of the compressor housing section, which drive shaft drives the cylinders 561 , 581 via eccentrics 761 and 781 .

[0099] Drive shaft 74 is supported in a shaft bearing 82 held on cover 22 and in a shaft bearing 84 arranged between compressor housing portion 12 and motor housing portion 14 and extends with a drive section 86 into rotor 46 which is supported rotatably about axis 48 by drive section 86 .

[0100] like Figure 1 and Figure 2 As shown in the figure, the cover 24 is designed, for example, in a pot-shaped manner, which closes the motor housing section 14 on the side of the motor housing section 14 opposite the compressor housing section 12, and the cover 24 includes, for example, a section 92 directly connected to the motor housing section 14, which extends from the motor housing section 14 to a closing body 94 that closes the cylindrical section 92 at the end side and transitions into the closing body.

[0101] The section 92 is designed, for example, in such a way that it bridges a winding head 96 of the stator 44 facing the cover 24 , which extends into the cover 24 to such an extent that an intermediate space 98 remains between the winding head 96 and the closing body 94 .

[0102] like Figure 3 As shown in FIG. 1 , the inlet 34 comprises an inlet channel 102 extending from the suction connection 32 toward the motor chamber 36 , which is adjoined by an inlet chamber 104 extending radially relative to the inlet channel 102 and having an opening 106 toward the motor chamber 36 .

[0103] Preferably, the inlet channel 102 is arranged towards the rotor 46 approximately in such a way that the refrigerant flow through it is directed towards the drive section 86 and in the same way the adjoining inflow chamber 104 is also oriented with its opening 106 towards the motor chamber 36 .

[0104] like Figure 4 As shown in the figure, the opening 106 is covered by a cover, which is designated as a whole by 112, which completely covers the opening 106 and includes an external frame 114, which rests radially outside the opening 106 on the closing body 94 of the lid 24 in a sealing manner and is retained, for example, by means of screws 116.

[0105] In addition to the frame 114, the cover 112 includes a filter element 118 which is held unfolded by the frame 114, through which the refrigerant entering from the suction side flows, and particles carried by the refrigerant transported from the suction side are filtered out before the refrigerant enters the motor space 36, so that the filtered particles accumulate in the inlet chamber 104, preferably in a collection area 122 located below the inlet channel 102 in the direction of gravity.

[0106] In this case, the filter element 118 is preferably formed from a filter material having a passage size of less than 250 micrometers, better still less than 200 micrometers, preferably in the range of approximately 150 micrometers.

[0107] In this case, filter element 118 is expediently formed by a fabric composed of wires, in particular a so-called wire mesh fabric, in which the warp weave is coarser than the weft weave in order to achieve the desired small mesh width for the passage.

[0108] In order to optimally distribute the refrigerant flowing in through the inlet opening 102 to the rotor 46 and the stator 44 for cooling the rotor 46 and the stator 44, in a first embodiment of the refrigerant compressor according to the invention, the cover 112 comprises an inlet guide hood 128 ( Figure 5 ), the inlet guide hood having an external frame 134 that is substantially consistent with the frame 114, on the one hand, a flow distribution element 136 is held on the frame as an inlet guide element, the flow distribution element radially outwardly distributes the refrigerant flow that passes through the inlet channel 102 and is oriented approximately toward the drive section 86, and in this way, a portion of the refrigerant flow flows around the winding head 96 and flows around the stator 44 radially outward through the intermediate space 98, and a portion of the refrigerant flow hits the rotor 46 at the end side and passes at least between the rotor 46 and the stator 44 to cool the electric motor 42.

[0109] like Figure 6 As shown in FIG. 1 , the flow distribution element 136 is formed, for example, by a substantially circular disk which is connected to the frame 134 via retaining tabs 142 and 144 .

[0110] The flow distribution element 136 also serves at the same time as a collision protection or wear protection in order to protect components which would otherwise be directly exposed to the refrigerant flow.

[0111] In this case, the retaining web 144 extending from the flow distribution element 136 in the direction of gravity is preferably designed to be widened and is a particle guide element serving as a further inlet guide element in order to guide particles emerging from the flow distribution element 136 toward the collecting region 122 .

[0112] Furthermore, preferably, the particle guide element 144 transitions into a shielding element 146 serving as a further entry guide element, which reduces the flow through the collection area 122 and thus reduces the flow through the refrigerant of particles deposited in the collection area 122, wherein the shielding element 146 preferably also has a sickle-like shape as a whole and is molded onto the frame 134.

[0113] The frame 134 of the shielding element 146 is connected to the frame 114, so that the combination of the frame 114, the filter element 118 and the inlet guide cover 128 forms a Figure 7 FIG. 1 shows a cover 112 ′ according to a first embodiment.

[0114] A first variant of the first exemplary embodiment provides that both the filter element 118 and the inlet guide cap 128 are connected to the frame 114 .

[0115] A second variant of the first exemplary embodiment provides that the inlet guide cap 128 is directly connected to the filter element 118 , in particular is fastened thereto, while the frame 114 and the inlet guide cap 128 are not directly connected.

[0116] A third variant of the first exemplary embodiment provides that the frame 114 with the filter element 118 and the frame 134 with the inlet guide cap 128 are mounted as separate components.

[0117] like Figure 8 As shown in FIG. 1 , in a second embodiment of a refrigerant compressor according to the invention, the collecting area 122 is accessible via an inlet opening 148 formed into and passing through the closing body 94 of the cover 24 in order to remove separated particles collected in the collecting area 122 .

[0118] In this case, the inlet opening 148 is closable by a closing body 152 .

[0119] Furthermore, those elements of the second embodiment which are identical to the aforementioned elements are provided with the same reference numerals, so that the entire contents of the description regarding these elements can be referred to these embodiments.

[0120] like Fig. 9 As shown in, relative to the aforementioned embodiments, in a third embodiment of the refrigerant compressor according to the present invention, a receiving space 154 is arranged in the closing body 94 of the cover 24 following the collection area 122, the receiving space extending to a side 156 of the closing body 94 of the cover 24 facing away from the motor space 36 and being closable by a closing element 158, so that a large amount of particles can be transferred from the collection area 122 into the receiving space 154 and can be removed from the receiving space after the closing element 158 ​​is removed.

[0121] Furthermore, the same elements in this embodiment as those in the previous embodiment are also provided with the same reference numerals, so that the entire contents of the description about these elements can be referred to the embodiments about the previous embodiment.

[0122] like Fig.10 As shown in, in a fourth embodiment of the cover 112′ according to the invention, for example a thin flat material, in particular a film 162, is held on a frame 114′, in which the region of the filter element 118′ is formed by a passage 164′ introduced into the film 162 or already existing in the film 162, while the flow distribution element 136′, the particle guide element 144′ and the shielding element 146′ are formed by a region of the film 162, in which region no or very little passage 164 is introduced, so that the film 162 forms the filter element 118′ on the one hand and also forms an element entering the guide hood 128 on the other hand.

[0123] In the case of thin flat material 162 , however, the frame can also be omitted if the flat material has sufficient intrinsic rigidity.

Claims

1. A semi-hermetic refrigerant compressor, comprising a compressor unit (54) and an electric motor (42), a main housing (10), wherein the main housing has a motor housing section (14) for the electric motor (42) and a compressor housing section (12) for the compressor unit (54), wherein the semi-hermetic refrigerant compressor comprises a refrigerant path from a suction interface (32) on the main housing (10) to a suction side of the compressor unit (54) and a refrigerant path to a pressure side of a pressure interface of the compressor unit (54), characterized in that: An inlet (34) is arranged on the motor housing section (14) in a region opposite the compressor housing section (12), the inlet being used for refrigerant to be supplied to a motor space (36) in the motor housing section (14), and the inlet (34) is provided with a cover (112) having an inlet guide element (136, 144, 146) and a filter element (118) for separating particles entrained by the refrigerant.

2. The refrigerant compressor according to claim 1, characterized in that: The cover (112) bridges the opening (106) of the access portion (104) toward the motor space (36).

3. The refrigerant compressor according to claim 1 or 2, characterized in that: The cover (112) has a frame (114) for holding and fixing the filter element (118).

4. The refrigerant compressor according to claim 3, characterized in that: The frame (114) surrounds the opening (106) of the access (34) facing the motor chamber (36) on the outside.

5. A refrigerant compressor according to any one of the preceding claims, characterised in that The inlet portion (34) causes the refrigerant to hit the cover (112) in a flow direction directed toward the rotor (46) of the electric motor (42).

6. The refrigerant compressor according to any one of claims 3 to 5, characterized in that: The cover (112) has a flow distribution element (136) as an inlet guide element, which distributes the refrigerant flow passing through the inlet portion (34) to a region of the filter element (118) surrounding the flow distribution element (136).

7. A refrigerant compressor according to any one of the preceding claims, characterised in that The inlet (34) is designed in such a way that it causes the refrigerant flow to impinge on the flow distribution element (136).

8. A refrigerant compressor according to any one of the preceding claims, characterised in that The inlet (34) has an inlet chamber (104) which is provided for receiving particles retained by the filter element (118), and the cover (112) bridges an opening (106) of the inlet chamber (104) which faces the motor space (36).

9. The refrigerant compressor according to claim 8, characterized in that: The inlet chamber (104) is provided with a collecting area (122) for particles retained by the filter element (118).

10. The refrigerant compressor according to claim 8 or 9, characterized in that: The cover (112) has a particle guide element (144) as an inlet guide element, which extends from the flow distribution element (136) to a collecting region (122) of the inlet chamber (104).

11. The refrigerant compressor according to any one of claims 8 to 10, characterized in that: The cover (112) has a shielding element (146) as an inlet guide element, which defines a collecting area (122) for particles filtered from the refrigerant flow by the filter element (118) and deposited in the collecting area (112) of the inlet chamber (104).

12. The refrigerant compressor according to claim 11, characterized in that The shielding element (146) reduces, in particular prevents, the flow of particles deposited in the collecting region (122) of the inlet chamber (104) through a portion of the refrigerant flow.

13. A refrigerant compressor according to any one of the preceding claims, characterised in that The filter element (118) is made of metal wire fabric or metal wire knitted fabric.

14. The refrigerant compressor according to claim 13, characterized in that: The wire fabric or knitted wire fabric of the filter element (118) extends as far as the frame (114) and is held thereon.

15. The refrigerant compressor according to any one of claims 6 to 14, characterized in that The flow distributor element (136) is arranged upstream of the filter element (118) in the direction of flow and covers the filter element in places.

16. The refrigerant compressor according to any one of claims 6 to 15, characterized in that The particle guide element (144) is arranged upstream of the filter element (118) in the direction of flow and covers the filter element in places.

17. The refrigerant compressor according to any one of claims 6 to 16, characterized in that The shielding element (146) is arranged upstream of the filter element (118) in the direction of flow and covers the filter element in places.

18. The refrigerant compressor according to any one of claims 6 to 17, characterized in that: The flow distribution element (136) and / or the particle deflection element (144) and / or the shielding element (146) are components of an inlet guide hood.

19. The refrigerant compressor according to claim 18, characterized in that: The cover element (112) includes the entry guide cover (128).

20. A refrigerant compressor according to any one of the preceding claims, characterised in that The filter element (118) is formed by a thin flat material (162).

21. The refrigerant compressor according to claim 20, characterized in that The filter element (118) is formed by an opening (164) introduced into the thin flat material (162).

22. The refrigerant compressor according to claim 19 or 20, characterized in that: The flow distribution element (136) is integrated into the thin flat material (162).

23. The refrigerant compressor according to claims 19 to 22, characterized in that The particle deflecting element (144) is integrated into the thin flat material (162).

24. The refrigerant compressor according to any one of claims 19 to 23, characterized in that The shielding element (146) is integrated into the thin flat material (162).

25. The refrigerant compressor according to any one of claims 8 to 24, characterized in that The inlet chamber (104) is provided with an external inlet opening (148) which is provided in addition to the inlet portion (34).

26. The refrigerant compressor according to claim 25, characterized in that The outer inlet opening (148) is arranged in the region of a collecting region (122) of the inlet chamber (104).

27. The refrigerant compressor according to claim 26, characterized in that The external inlet opening (148) opens into the collecting area (122) of the inlet chamber (104).

28. The refrigerant compressor according to claim 26 or 27, characterized in that: The inlet opening (147) can be closed externally by a closing body (152).

29. The refrigerant compressor according to any one of claims 8 to 28, characterized in that Adjoining the collecting area (122) of the inlet chamber (104) is a receiving space (154), which is in particular accessible through the cover (24) and in particular from a side of the cover (24) facing away from the motor space (36).

30. The refrigerant compressor according to claim 27, characterized in that The receiving space (154) can be closed by a closing element (158) which can be fastened to the cover (24).

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