Fluid machine and compressor

Abstract

The application provides a fluid machine and a compressor. The fluid machine comprises a shell, a pump body assembly, a motor assembly and an oil-gas separation part. The shell has a containing cavity, an air inlet and an air outlet. The pump body assembly is located in the containing cavity, and a crankshaft of the pump body assembly has an oil return channel which is communicated with the containing cavity. The motor assembly is drivingly connected with the crankshaft, and the motor assembly has a flow guide channel, a flow guide inlet communicated with the flow guide channel, a first outlet and a second outlet. The flow guide inlet is communicated with the containing cavity, the first outlet is communicated with the air outlet, and the second outlet is communicated with the oil return channel. The oil-gas separation part is arranged at the first outlet, so that the refrigerant separated by the oil-gas separation part is discharged from the air outlet, and the lubricating oil separated by the oil-gas separation part flows back to the oil pool along the oil return channel. The application solves the problem that the oil blocking cap on the rotor structure of the motor assembly in the prior art cannot effectively separate the lubricating oil and the refrigerant.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a fluid machine and a compressor. BACKGROUND

[0002] During the operation of the compressor, the lubricating oil is prone to flowing with the refrigerant and being discharged from the exhaust port of the compressor, which seriously affects the lubricating oil of the pump body assembly of the compressor, even affects the heat exchange between the refrigerant and the outside world, and even affects the service life of the compressor.

[0003] In the prior art, an oil blocking cap is installed on the rotor structure of the motor assembly of the compressor to separate the lubricating oil and the refrigerant, but the oil blocking cap has no obvious separation effect on the lubricating oil and the refrigerant. SUMMARY

[0004] The main purpose of the present application is to provide a fluid machine and a compressor to solve the problem that the oil blocking cap on the rotor structure of the motor assembly in the prior art cannot effectively separate the lubricating oil and the refrigerant.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a fluid machine is provided, comprising a shell, a pump body assembly, a motor assembly and an oil-gas separation part, wherein the shell has a containing cavity, an air inlet and an exhaust port which are in communication with the containing cavity; the pump body assembly is located in the containing cavity, and the pump body assembly comprises a crankshaft, the crankshaft has an oil return channel, and the oil return channel is in communication with the containing cavity; the motor assembly is located in the containing cavity, and the motor assembly is drivingly connected with the crankshaft, the motor assembly has a flow guide channel and a flow guide inlet, a first outlet and a second outlet which are in communication with the flow guide channel, the flow guide inlet is in communication with the containing cavity, the first outlet is in communication with the exhaust port, and the second outlet is in communication with the oil return channel; the oil-gas separation part is arranged at the first outlet, so that the refrigerant separated by the oil-gas separation part is discharged from the exhaust port, and the lubricating oil separated by the oil-gas separation part flows back to the oil pool along the oil return channel.

[0006] Further, the flow guide inlet is directed to one side of the upper flange of the pump body assembly, the first outlet is directed in the opposite direction to the flow guide inlet, and the second outlet is directed to the crankshaft.

[0007] Further, the motor assembly comprises a rotor structure and a stator structure, the rotor structure is sleeved on the outer circumferential side of the crankshaft, the stator structure is sleeved on the outer circumferential side of the rotor structure, and the rotor structure has the flow guide channel.

[0008] Further, the flow guide channel is a plurality of flow guide channels, the plurality of flow guide channels are arranged at intervals around the circumference of the rotor structure, and the plurality of flow guide channels are all in communication with the oil return channel.

[0009] Further, the flow guide channel comprises a first channel segment and a second channel segment, wherein the first channel segment extends through the axial ends of the rotor structure, and the first channel segment has a flow guide inlet at one end thereof towards the upper flange of the pump body assembly, and the first channel segment has a first outlet at the other end thereof away from the flow guide inlet; the first end of the second channel segment is in communication with the first channel segment, and the second end of the second channel segment extends away from the first channel segment and penetrates through the inner wall surface of the rotor structure to be in communication with the oil return channel, and the second end of the second channel segment has a second outlet.

[0010] Further, the first channel segment and the second channel segment are arranged at an angle.

[0011] Further, the first channel segment extends in the axial direction of the rotor structure; and / or, the second channel segment extends in the radial direction of the rotor structure.

[0012] Further, the rotor structure comprises a first lamination structure, a second lamination structure and a third lamination structure, wherein the first lamination structure has a first sub-channel extending in the axial direction of the first lamination structure and penetrating through the axial ends of the first lamination structure; the second lamination structure is stacked on the first lamination structure, and the second lamination structure has a second sub-channel at a position opposite to the first sub-channel, the second sub-channel extending in the axial direction of the second lamination structure and penetrating through the axial ends of the second lamination structure to be in communication with the first sub-channel, and the second lamination structure further has a second channel segment, and the first end of the second channel segment is in communication with the second sub-channel, and the second end of the second channel segment extends in the radial direction of the second lamination structure and penetrates through the inner wall surface of the second lamination structure; the third lamination structure is stacked on the second lamination structure, and the third lamination structure has a third sub-channel at a position opposite to the second sub-channel, the third sub-channel extending in the axial direction of the third lamination structure and penetrating through the axial ends of the third lamination structure to be in communication with the second sub-channel, so that the third sub-channel, the second sub-channel and the first sub-channel jointly form the first channel segment.

[0013] Further, the channel diameter of the first sub-channel, the channel diameter of the second sub-channel and the channel diameter of the third sub-channel are equal.

[0014] Further, the thickness of the first lamination structure is H1, the thickness of the second lamination structure is H2, and the thickness of the third lamination structure is H3, wherein H1>H2, and H1>H3.

[0015] Further, the oil-gas separation part is a plate-shaped structure embedded at the third sub-channel, and a plurality of separation holes are formed in the plate-shaped structure.

[0016] Further, the oil-gas separation part is integrally formed with the third lamination structure.

[0017] Further, the crankshaft has an eccentric portion, one end of the crankshaft away from the eccentric portion is connected with the motor assembly, the oil return channel comprises an annular oil return groove and an axial oil return hole, the annular oil return groove is arranged at the outer circumferential surface of the one end of the crankshaft away from the eccentric portion, and the annular oil return groove extends around the circumference of the crankshaft; the axial oil return hole is a blind hole arranged in the axial direction of the crankshaft, and the open end of the blind hole is located on the end surface of the one end of the crankshaft away from the motor assembly; wherein at least one communication oil return hole is arranged on the groove bottom surface of the annular oil return groove, the communication oil return hole extends in the radial direction of the crankshaft and penetrates into the axial oil return hole.

[0018] Further, the crankshaft has an eccentric portion, one end of the crankshaft away from the eccentric portion is connected with the motor assembly, the oil return channel comprises an annular oil return groove and an axial oil return hole, the annular oil return groove is arranged at the outer circumferential surface of the one end of the crankshaft away from the eccentric portion, and the annular oil return groove extends around the circumference of the crankshaft; the axial oil return hole is a blind hole arranged in the axial direction of the crankshaft, and the open end of the blind hole is located on the end surface of the one end of the crankshaft away from the motor assembly; wherein at least one communication oil return hole is arranged on the groove bottom surface of the annular oil return groove, the communication oil return hole extends in the radial direction of the crankshaft and penetrates into the axial oil return hole.

[0019] According to another aspect of the present application, there is provided a compressor including a fluid machine, the fluid machine being the above-described fluid machine.

[0020] By applying the technical solution of the present application, the oil return channel is arranged on the crankshaft of the pump body assembly, at the same time, the flow guide channel, the flow guide inlet, the first outlet and the second outlet which are communicated with the flow guide channel are arranged on the motor assembly, and the oil-gas separation part is arranged at the first outlet, so that the lubricating oil discharged from the pump body assembly enters the flow guide channel through the flow guide inlet along with the refrigerant, and the separation of the lubricating oil and the refrigerant is realized under the separation action of the oil-gas separation part at the first outlet, so that the refrigerant is discharged from the first outlet and then from the exhaust port, and the separated lubricating oil enters the oil return channel on the crankshaft through the second outlet and flows back to the oil pool, thereby ensuring the effectiveness of oil-gas separation and also ensuring the normal operation of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In the drawings:

[0022] Figure 1 An internal schematic view of a compressor according to Embodiment One of the present application is shown;

[0023] Figure 2 A structural schematic view of an oil return path of a compressor in Figure 1

[0024] ​Figure 3 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 1 An enlarged structural schematic view of A in FIG. 1 is shown;

[0025] Figure 4 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 1 An enlarged structural schematic view of A in FIG. 1 is shown;

[0026] Figure 5 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 4 An enlarged structural schematic view of A in FIG. 1 is shown;

[0027] Figure 6 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 1 An enlarged structural schematic view of A in FIG. 1 is shown;

[0028] Figure 7 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 6 An enlarged structural schematic view of A in FIG. 1 is shown;

[0029] Figure 8 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 6 An enlarged structural schematic view of A in FIG. 1 is shown;

[0030] Figure 9 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 6 An enlarged structural schematic view of A in FIG. 1 is shown;

[0031] Figure 10 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 1 An enlarged structural schematic view of A in FIG. 1 is shown;

[0032] Figure 11 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 10 An enlarged structural schematic view of A in FIG. 1 is shown;

[0033] Figure 12 An enlarged structural schematic view of A in FIG. 1 is shown;

[0034] Figure 13 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 12 An enlarged structural schematic view of A in FIG. 1 is shown;

[0035] Figure 14 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 13 An enlarged structural schematic view of A in FIG. 1 is shown;

[0036] Figure 15 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 12 An enlarged structural schematic view of A in FIG. 1 is shown;

[0037] Figure 16 An enlarged structural schematic view of A in FIG. 1 is shown; Figure 15 An enlarged structural schematic view of A in FIG. 1 is shown;

[0038] Figure 17 Fig. 1 shows a partial structural schematic diagram of a rotor structure and a crankshaft of a motor assembly in an assembled state in the motor assembly of Fig. 1; Figure 12

[0039] Figure 18 Fig. 2 shows a partial structural schematic diagram of a crankshaft in the motor assembly of Fig. 1. Figure 17

[0040] In the above drawings, the following reference signs apply:

[0041] 10, housing; 11, accommodating cavity; 12, air inlet; 13, air outlet; 14, upper cover; 15, lower cover; 16, cylinder body;

[0042] 20, pump body assembly; 21, crankshaft; 211, oil return channel; 2111, annular oil return groove; 2112, axial oil return hole; 2113, axial oil return groove; 212, eccentric part; 22, upper flange; 23, lower flange; 24, cylinder sleeve; 25, roller;

[0043] 30, motor assembly; 31, flow guide channel; 311, first channel segment; 3111, flow guide inlet; 3112, first outlet; 312, second channel segment; 3121, second outlet; 32, rotor structure; 321, first lamination structure; 3211, first sub-channel; 322, second lamination structure; 3221, second sub-channel; 323, third lamination structure; 324, upper balance block; 325, oil blocking cap; 326, oil blocking seat; 327, rotor core; 328, baffle; 329, lower balance block; 33, stator structure;

[0044] 40, oil-gas separation part; 41, separation hole;

[0045] 50, liquid accumulator;

[0046] 100, communication oil return hole. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] ​​In order to solve the problem that the oil blocking cap on the rotor structure of the motor assembly in the prior art cannot effectively separate the lubricating oil and the refrigerant, the present application provides a fluid machine and a compressor, wherein the compressor comprises the fluid machine.

[0049] Embodiment one

[0050] As shown in Figures 1 to 11 , the fluid machine comprises a housing 10, a pump body assembly 20, a motor assembly 30 and an oil-gas separation part 40, wherein the housing 10 has a containing cavity 11, an air inlet 12 and an air outlet 13 which communicate with the containing cavity 11; the pump body assembly 20 is located in the containing cavity 11, and the pump body assembly 20 comprises a crankshaft 21 which has an oil return channel 211 which communicates with the containing cavity 11; the motor assembly 30 is located in the containing cavity 11, and the motor assembly 30 is drivingly connected with the crankshaft 21, and the motor assembly 30 has a flow guide channel 31 and a flow guide inlet 3111, a first outlet 3112 and a second outlet 3121 which communicate with the flow guide channel 31, the flow guide inlet 3111 communicates with the containing cavity 11, the first outlet 3112 communicates with the air outlet 13, and the second outlet 3121 communicates with the oil return channel 211; the oil-gas separation part 40 is arranged at the first outlet 3112, so that the refrigerant separated by the oil-gas separation part 40 is discharged from the air outlet 13, and the lubricating oil separated by the oil-gas separation part 40 flows back to the oil pool along the oil return channel 211.

[0051] By arranging the oil return channel 211 on the crankshaft 21 of the pump body assembly 20, and arranging the flow guide channel 31 and the flow guide inlet 3111, the first outlet 3112 and the second outlet 3121 which communicate with the flow guide channel 31 on the motor assembly 30, and arranging the oil-gas separation part 40 at the first outlet 3112, the lubricating oil discharged from the pump body assembly 20 enters the flow guide channel 31 along with the refrigerant through the flow guide inlet 3111, and the separation of the lubricating oil and the refrigerant is realized under the separation action of the oil-gas separation part 40 at the first outlet 3112, so that the refrigerant is discharged from the first outlet 3112 and then from the air outlet 13, and the separated lubricating oil enters the oil return channel 211 on the crankshaft 21 through the second outlet 3121 and flows back to the oil pool, thereby ensuring the effectiveness of oil-gas separation and ensuring the normal operation of the compressor.

[0052] It should be noted that, in the present application, the fluid machine is described by taking the compressor as an example.

[0053] As shown in Figure 1 and Figure 2As shown, the flow inlet 3111 faces the upper flange 22 of the pump body assembly 20, the first outlet 3112 faces the opposite direction to the flow inlet 3111, and the second outlet 3121 faces the crankshaft 21. In this way, by setting the different orientations of the flow inlet 3111, the first outlet 3112, and the second outlet 3121, the reliability of the flow channel 31 in guiding the refrigerant is ensured, while also ensuring that the flow channel 31, in conjunction with the return oil channel 211, achieves the purpose of returning lubricating oil.

[0054] It should be noted that, in this application, considering that the rotor structure 32 is sleeved on the outer periphery of the crankshaft 21, and the rotor structure 32 rotates synchronously with the crankshaft 21, such as Figure 1 and Figure 2 As shown, the motor assembly 30 includes a rotor structure 32 and a stator structure 33. The rotor structure 32 is sleeved on the outer periphery of the crankshaft 21, and the stator structure 33 is sleeved on the outer periphery of the rotor structure 32. The rotor structure 32 has a flow guiding channel 31.

[0055] It should be noted that in this application, there are multiple guide channels 31, which are arranged circumferentially around the rotor structure 32, and all of the multiple guide channels 31 are connected to the oil return channel 211. In this way, multiple guide channels 31 can be connected to the oil return channel 211 simultaneously, ensuring that the lubricating oil separated by the oil-gas separator 40 in each guide channel 31 can flow back to the oil sump in a timely manner through the oil return channel 211, thus ensuring the reliability of the compressor's oil return.

[0056] like Figure 4 and Figure 5 As shown, the flow guiding channel 31 includes a first channel section 311 and a second channel section 312. The first channel section 311 extends through both axial ends of the rotor structure 32, and the end of the first channel section 311 facing the upper flange 22 of the pump body assembly 20 has a flow guiding inlet 3111, and the end of the first channel section 311 away from the flow guiding inlet 3111 has a first outlet 3112. The first end of the second channel section 312 is connected to the first channel section 311, and the second end of the second channel section 312 extends in a direction away from the first channel section 311 and extends through to the inner wall of the rotor structure 32 to communicate with the oil return channel 211. The second end of the second channel section 312 has a second outlet 3121. In this way, by setting the flow channel 31 into a structure including a first channel section 311 and a second channel section 312, the lubricating oil enters the first channel section 311 along with the refrigerant and is separated by the oil-gas separator 40. The refrigerant carrying a small amount of lubricating oil is discharged through the first outlet 3112 and the exhaust port 13. At the same time, the separated lubricating oil enters the return oil channel 211 through the second outlet 3121 on the second channel section 312 and flows back to the oil sump.

[0057] It should be noted that in the present application, the first channel segment 311 and the second channel segment 312 are arranged at an angle.

[0058] Specifically, the first channel segment 311 extends along the axial direction of the rotor structure 32; and / or, the second channel segment 312 extends along the radial direction of the rotor structure 32.

[0059] As shown in Figures 6 to 9 , the rotor structure 32 includes a first lamination structure 321, a second lamination structure 322, and a third lamination structure 323, wherein the first lamination structure 321 has a first sub-channel 3211 extending along the axial direction of the first lamination structure 321 and penetrating through both axial ends of the first lamination structure 321; the second lamination structure 322 is stacked on the first lamination structure 321, and the second lamination structure 322 has a second sub-channel 3221 at a position opposite to the first sub-channel 3211, the second sub-channel 3221 extending along the axial direction of the second lamination structure 322 and penetrating through both axial ends of the second lamination structure 322 to communicate with the first sub-channel 3211, the second lamination structure 322 further has a second channel segment 312, and a first end of the second channel segment 312 communicates with the second sub-channel 3221, a second end of the second channel segment 312 extends along the radial direction of the second lamination structure 322 and penetrates through the inner wall surface of the second lamination structure 322; the third lamination structure 323 is stacked on the second lamination structure 322, and the third lamination structure 323 has a third sub-channel at a position opposite to the second sub-channel 3221, the third sub-channel extending along the axial direction of the third lamination structure 323 and penetrating through both axial ends of the third lamination structure 323 to communicate with the second sub-channel 3221, so that the third sub-channel, the second sub-channel 3221, and the first sub-channel 3211 together form the first channel segment 311.

[0060] As shown in Figure 4 , the rotor structure 32 includes an upper balance block 324, an oil baffle cap 325, an oil baffle seat 326, a rotor core 327, a baffle plate 328, and a lower balance block 329, and the rotor structure 32 described above includes the first lamination structure 321, the second lamination structure 322, and the third lamination structure 323, specifically, the rotor core 327 includes the first lamination structure 321, the second lamination structure 322, and the third lamination structure 323.

[0061] It should be noted that in the present application, the communication between the flow guide channel 31 and the oil return channel 211 can realize primary oil-gas separation, and after the refrigerant carrying a small amount of lubricating oil is discharged from the first outlet 3112, it can also realize secondary oil-gas separation through the oil baffle cap 325.

[0062] Preferably, the channel diameter of the first sub-channel 3211, the channel diameter of the second sub-channel 3221, and the channel diameter of the third sub-channel are all equal. In this way, it is ensured that there is no leakage between adjacent first sub-channels 3211 and second sub-channels 3221, or between adjacent second sub-channels 3221 and third sub-channels.

[0063] As shown in Figure 6 , the thickness of the first stamping structure 321 is H1, the thickness of the second stamping structure 322 is H2, and the thickness of the third stamping structure 323 is H3, where H1>H2, and H1>H3. In this way, the first stamping structure 321 is arranged to be the thickest, and the thicknesses of the second stamping structure 322 and the third stamping structure 323 are both less than that of the first stamping structure 321, so that most of the first channel section 311 is formed on the first stamping structure 321, and at the same time, the second channel section 312 is formed on the second stamping structure 322.

[0064] As shown in Figure 9 , the oil-gas separation part 40 is a plate-shaped structure embedded in the third sub-channel, and a plurality of separation holes 41 are formed on the plate-shaped structure. In this way, the plurality of separation holes 41 play a role of blocking the lubricating oil as much as possible to prevent a large amount of lubricating oil from being discharged from the first outlet 3112.

[0065] It should be noted that in the present application, the oil-gas separation part 40 is integrally formed with the third stamping structure 323. In this way, the plurality of separation holes 41 are punched out during the process of directly stamping the third stamping structure 323, ensuring the processing convenience of the oil-gas separation part 40 and the third stamping structure 323.

[0066] As shown in Figure 10 and Figure 11 , the crankshaft 21 has an eccentric portion 212, one end of the crankshaft 21 away from the eccentric portion 212 is connected with the motor assembly 30, the oil return channel 211 includes an annular oil return groove 2111 and an axial oil return hole 2112, the annular oil return groove 2111 is formed at the outer circumferential surface of the one end of the crankshaft 21 away from the eccentric portion 212, and the annular oil return groove 2111 extends around the circumference of the crankshaft 21; the axial oil return hole 2112 is a blind hole formed in the axial direction of the crankshaft 21, and the open end of the blind hole is located on the end face of the one end of the crankshaft 21 away from the motor assembly 30; wherein at least one communication oil return hole 100 is formed on the groove bottom surface of the annular oil return groove 2111, the communication oil return hole 100 extends in the radial direction of the crankshaft 21 and penetrates to the axial oil return hole 2112. In this way, by arranging the oil return channel 211 in the form of an annular oil return groove 2111 and an axial oil return hole 2112, and at the same time, the annular oil return groove 2111 and the axial oil return hole 2112 are communicated through the communication oil return hole 100, the communication reliability between the two is ensured.

[0067] AsFigure 1 and Figure 2 As shown in Figs. 1 and 2, the shell 10 further comprises an upper cover 14, a lower cover 15 and a cylinder body 16, wherein the upper cover 14 and the lower cover 15 are respectively arranged at the axial two ends of the cylinder body 16.

[0068] As shown in Figs. 1 and 2, the shell 10 further comprises an upper cover 14, a lower cover 15 and a cylinder body 16, wherein the upper cover 14 and the lower cover 15 are respectively arranged at the axial two ends of the cylinder body 16. Figure 2 and Figure 3 As shown in Figs. 1 and 2, the shell 10 further comprises an upper cover 14, a lower cover 15 and a cylinder body 16, wherein the upper cover 14 and the lower cover 15 are respectively arranged at the axial two ends of the cylinder body 16.

[0069] As shown in Figs. 1 and 2, the shell 10 further comprises an upper cover 14, a lower cover 15 and a cylinder body 16, wherein the upper cover 14 and the lower cover 15 are respectively arranged at the axial two ends of the cylinder body 16. Figure 1 and Figure 2 As shown in Figs. 1 and 2, the shell 10 further comprises an upper cover 14, a lower cover 15 and a cylinder body 16, wherein the upper cover 14 and the lower cover 15 are respectively arranged at the axial two ends of the cylinder body 16.

[0070] Embodiment Two

[0071] As shown in Figs. 1 and 2, the shell 10 further comprises an upper cover 14, a lower cover 15 and a cylinder body 16, wherein the upper cover 14 and the lower cover 15 are respectively arranged at the axial two ends of the cylinder body 16. Figures 12 to 18 As shown in Figs. 1 and 2, the shell 10 further comprises an upper cover 14, a lower cover 15 and a cylinder body 16, wherein the upper cover 14 and the lower cover 15 are respectively arranged at the axial two ends of the cylinder body 16.

[0072] It should be noted that the terms "comprises", "comprising", "includes", "including", "has", "having" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of features is not necessarily limited only to those features but can include other features not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, "or" means an inclusive -or and not an exclusive -or. That is, unless specifically stated to the contrary, "or" means alternatively and / or inclusively, that is whether the quantitative features are exclusive with one another or whether the quantitative features are inclusive of one another. In addition, use of "a" or "an" are employed to describe amounts of quantitative features that can include one or more of the quantitative features.

[0073] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the Examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily drawn to scale of the actual proportions of the parts being depicted. Techniques, methods, and apparatus known to those of ordinary skill can not be discussed in detail because such techniques, methods, and apparatus are considered to be part of the patent specification. In all examples shown and discussed herein, any specific values are to be interpreted as merely exemplary and not limiting. Thus, other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and therefore, further discussion of the same will not be repeated.

[0074] Spatially relative terms, such as "on", "above", "top", "side", "bottom", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device shown in the figures is turned over, elements described as "above" other elements or features would then be oriented "below" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Well-known functions or constructions can not be shown or described in detail because such functions or constructions are considered to be part of the patent specification.

[0075] It should be noted that the terms "comprises", "comprising", "includes", "including", "has", "having" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of features is not necessarily limited only to those features but can include other features not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, "or" means an inclusive -or and not an exclusive -or. That is, unless specifically stated to the contrary, "or" means alternatively and / or inclusively, that is whether the quantitative features are exclusive with one another or whether the quantitative features are inclusive of one another. In addition, use of "a" or "an" are employed to describe amounts of quantitative features that can include one or more of the quantitative features.

[0076] It should be noted that the terms "first", "second", and the like, used in the description and in the claims of the present application as well as above-mentioned figures are used to distinguish between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of data so designated is not meant to limit a given item described by such data to the same category as other data designated by the same designations, but instead is so designated only for convenience as a means of discriminating between the two series of items that refer to a same data.

[0077] The preferred embodiments of the application described herein are examples of the present application and are not intended to limit the scope of the application. Various modifications and changes can be made thereto by those skilled in the art which freely adapt to the idea and principles of the application, without departing from the spirit and scope thereof, and it is to be understood that such modifications and changes are to be included within the scope of the application as defined by the appended claims.

Claims

1. A fluid machine, characterized in that, include: The housing (10) has a receiving cavity (11) and an air inlet (12) and an air outlet (13) communicating with the receiving cavity (11). Pump body assembly (20), the pump body assembly (20) is located in the receiving cavity (11), and the pump body assembly (20) includes a crankshaft (21), the crankshaft (21) having an oil return passage (211) communicating with the receiving cavity (11); The motor assembly (30) is located in the receiving cavity (11) and is drivenly connected to the crankshaft (21). The motor assembly (30) has a flow channel (31) and a flow inlet (3111), a first outlet (3112), and a second outlet (3121) connected to the flow channel (31). The flow inlet (3111) is connected to the receiving cavity (11), the first outlet (3112) is connected to the exhaust port (13), and the second outlet (3121) is connected to the oil return channel (211). An oil-gas separator (40) is provided at the first outlet (3112) so that the refrigerant separated by the oil-gas separator (40) is discharged from the exhaust port (13) and the lubricating oil separated by the oil-gas separator (40) flows back to the oil pool along the oil return channel (211).

2. The fluid machinery according to claim 1, characterized in that, The flow inlet (3111) faces the upper flange (22) of the pump body assembly (20), the first outlet (3112) faces the opposite direction to the flow inlet (3111), and the second outlet (3121) is located facing the crankshaft (21).

3. The fluid machinery according to claim 1, characterized in that, The motor assembly (30) includes a rotor structure (32) and a stator structure (33). The rotor structure (32) is sleeved on the outer periphery of the crankshaft (21), and the stator structure (33) is sleeved on the outer periphery of the rotor structure (32). The rotor structure (32) has the flow channel (31).

4. The fluid machinery according to claim 3, characterized in that, There are multiple flow channels (31), and the multiple flow channels (31) are arranged circumferentially around the rotor structure (32), and the multiple flow channels (31) are all connected to the oil return channel (211).

5. The fluid machinery according to claim 3, characterized in that, The flow channel (31) includes: The first channel segment (311) extends through both axial ends of the rotor structure (32), and the first channel segment (311) has the flow inlet (3111) at one end facing the upper flange (22) of the pump body assembly (20), and the first outlet (3112) at the other end of the first channel segment (311) away from the flow inlet (3111). The second channel segment (312) has a first end connected to the first channel segment (311), and a second end extending away from the first channel segment (311) and penetrating to the inner wall of the rotor structure (32) to communicate with the oil return channel (211). The second end of the second channel segment (312) has a second outlet (3121).

6. The fluid machinery according to claim 5, characterized in that, The first channel segment (311) and the second channel segment (312) are arranged at an angle.

7. The fluid machinery according to claim 5, characterized in that, The first channel segment (311) extends axially along the rotor structure (32); and / or, The second channel segment (312) extends radially along the rotor structure (32).

8. The fluid machinery according to claim 5, characterized in that, The rotor structure (32) includes: A first lamination structure (321) has a first sub-channel (3211) which extends along the axial direction of the first lamination structure (321) and passes through both ends of the axial direction of the first lamination structure (321). The second stamping structure (322) is stacked on the first stamping structure (321), and the second stamping structure (322) has a second sub-channel (3221) at a position opposite to the first sub-channel (3211). The second sub-channel (3221) extends along the axial direction of the second stamping structure (322) and penetrates both ends of the axial direction of the second stamping structure (322) to communicate with the first sub-channel (3211). The second stamping structure (322) also has a second channel segment (312), and the first end of the second channel segment (312) communicates with the second sub-channel (3221). The second end of the second channel segment (312) extends along the radial direction of the second stamping structure (322) and penetrates the inner wall surface of the second stamping structure (322). The third stamping structure (323) is stacked on the second stamping structure (322), and the third stamping structure (323) has a third sub-channel at the position opposite to the second sub-channel (3221). The third sub-channel extends along the axial direction of the third stamping structure (323) and passes through both ends of the axial direction of the third stamping structure (323) to communicate with the second sub-channel (3221), so that the third sub-channel, the second sub-channel (3221), and the first sub-channel (3211) together form the first channel segment (311).

9. The fluid machinery according to claim 8, characterized in that, The diameters of the first sub-channel (3211), the second sub-channel (3221), and the third sub-channel are all equal.

10. The fluid machinery according to claim 8, characterized in that, The thickness of the first stamping structure (321) is H1, the thickness of the second stamping structure (322) is H2, and the thickness of the third stamping structure (323) is H3, wherein H1 > H2 and H1 > H3.

11. The fluid machinery according to claim 8, characterized in that, The oil-gas separation section (40) is a plate-shaped structure embedded in the third sub-channel, and the plate-shaped structure has multiple separation holes (41).

12. The fluid machinery according to claim 8, characterized in that, The oil-gas separation section (40) is integrally formed with the third stamping structure (323).

13. The fluid machinery according to any one of claims 1 to 12, characterized in that, The crankshaft (21) has an eccentric portion (212), and one end of the crankshaft (21) away from the eccentric portion (212) is connected to the motor assembly (30). The oil return channel (211) includes: An annular oil return groove (2111) is formed on the outer peripheral surface of the crankshaft (21) away from the eccentric part (212), and the annular oil return groove (2111) extends around the crankshaft (21) in the circumferential direction. Axial oil return hole (2112), wherein the axial oil return hole (2112) is a blind hole opened in the axial direction of the crankshaft (21), and the open end of the blind hole is located on the end face of the crankshaft (21) away from the motor assembly (30); The annular oil return groove (2111) has at least one connecting oil return hole (100) on its bottom surface. The connecting oil return hole (100) extends radially along the crankshaft (21) and penetrates the axial oil return hole (2112).

14. The fluid machinery according to any one of claims 1 to 12, characterized in that, The crankshaft (21) has an eccentric portion (212), and one end of the crankshaft (21) away from the eccentric portion (212) is connected to the motor assembly (30). The oil return channel (211) includes: An annular oil return groove (2111) is formed on the outer peripheral surface of the crankshaft (21) away from the eccentric part (212), and the annular oil return groove (2111) extends around the crankshaft (21) in the circumferential direction. An axial oil return groove (2113) is formed on the outer peripheral surface of the crankshaft (21). The first end of the axial oil return groove (2113) extends along the axial direction of the crankshaft (21) and passes through the annular oil return groove (2111) to communicate with the annular oil return groove (2111). The second end of the axial oil return groove (2113) extends along the axial direction of the crankshaft (21) by a predetermined distance so that the end face of the second end of the axial oil return groove (2113) is positioned at a distance from the end face of the motor assembly (30) facing the pump body assembly (20).

15. A compressor, characterized in that, Includes fluid machinery, wherein the fluid machinery is the fluid machinery according to any one of claims 1 to 14.

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