Compressor and vehicle

Abstract

The invention belongs to the technical field of compressors and discloses a compressor and a vehicle, the compressor comprises a shell, a motor, a crankshaft, a compression cylinder assembly, an impeller, a sealing cover and a partition plate, the partition plate divides the interior of the shell into a high-pressure area and a low-pressure area, the compression cylinder assembly is arranged in the high-pressure area, and the motor is arranged in the low-pressure area; the compression cylinder assembly is provided with an oil suction hole communicated with an oil pool in the high-pressure area, the sealing cover is located in the low-pressure area and fixed to the partition plate, the crankshaft rotationally penetrates through the sealing cover, the crankshaft, the sealing cover and the partition plate jointly form an oil storage cavity, the impeller is fixedly arranged on the crankshaft in a sleeving mode and located in the oil storage cavity, and an oil passing gap is formed between the crankshaft and the compression cylinder assembly. A low-pressure gap is reserved between the part, close to the partition plate, of the impeller and the crankshaft. The oil passing gap communicates with the low-pressure gap and the oil suction hole. The vehicle comprises the compressor. The compressor can improve the sealing performance of lubricating oil and prevent the lubricating oil from leaking to a low-pressure area.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a compressor and a vehicle. BACKGROUND

[0002] In the prior art, a compressor is provided with a crankshaft, a compression cylinder assembly, a partition plate and other components. The compression cylinder assembly includes an upper cylinder cover, a cylinder body mechanism and a lower cylinder cover. The number of cylinder bodies in the cylinder body mechanism can be one or more. When there are at least two cylinder bodies, an intermediate plate is connected between the two adjacent cylinder bodies. Specifically, the partition plate, the upper cylinder cover, the cylinder body mechanism and the lower cylinder cover are sequentially arranged in the axial direction of the compressor. The crankshaft penetrates the partition plate, the upper cylinder cover, the cylinder body mechanism and the lower cylinder cover.

[0003] The partition plate is fixed in the housing of the compressor and divides the housing into a high-pressure side and a low-pressure side. The side where the compression cylinder assembly is arranged is the high-pressure side, and the other side is the low-pressure side. In order to ensure lubrication and cooling during high-speed rotation of the crankshaft, a through oil hole is formed in the crankshaft, and an oil suction hole is formed in the compression cylinder assembly. A first oil passage gap is formed between the crankshaft and the compression cylinder assembly. The first oil passage gap is the gap between the crankshaft and the compression cylinder assembly towards the lower cylinder cover side. The first oil passage gap is towards the high-pressure side of the compressor. One end of the oil suction hole is communicated with an oil pool in the housing of the compressor, and the other end is communicated with the oil hole through the first oil passage gap. The oil suction channel sucks lubricating oil in the oil pool. The lubricating oil enters the oil hole through the oil suction channel in sequence, thereby lubricating the main rotating part of the crankshaft. In addition, a second oil passage gap is also formed between the crankshaft and the compression cylinder assembly. The second oil passage gap is the gap between the crankshaft and the compression cylinder assembly towards the upper cylinder cover side. The second oil passage gap is towards the low-pressure side of the compressor. During the oil inlet process of the oil suction hole, part of the lubricating oil will also seep out through the second oil passage gap, causing the lubricating oil on the high-pressure side of the compressor to leak, affecting lubrication and cooling, and reducing the reliability and stability of the compressor. SUMMARY

[0004] The purpose of the present application is to provide a compressor that effectively promotes the circulation of lubricating oil on the high-pressure side of the compressor and avoids the leakage of lubricating oil to the low-pressure side of the compressor.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] A compressor includes a housing, a motor, a crankshaft, a compression cylinder assembly, an impeller, a seal cover and a partition plate. The partition plate divides a cavity in the housing into a high-pressure zone and a low-pressure zone. The compression cylinder assembly is arranged in the high-pressure zone, and the motor is arranged in the low-pressure zone. In addition,

[0007] Part of the crankshaft is located in the low pressure area, and part of the crankshaft rotating through the partition plate penetrates into the compression cylinder assembly, the compression cylinder assembly is provided with an oil suction hole, and the oil suction hole is communicated with the oil pool in the high pressure area;

[0008] The sealing cover is located in the low pressure area and fixed on the partition plate, the crankshaft rotates through the sealing cover, the crankshaft, the sealing cover and the partition plate jointly form an oil storage cavity, and the impeller is fixedly sleeved on the crankshaft and located in the oil storage cavity.

[0009] An oil passing gap is arranged between the outer wall of the crankshaft and the inner wall of the compression cylinder assembly, a low pressure interval is left between the part of the impeller close to the partition plate and the crankshaft, the oil suction hole is communicated with the oil passing gap, and the oil suction hole is communicated with the oil storage cavity through the low pressure interval.

[0010] Preferably, an oil passing hole is axially arranged in the crankshaft, and the oil passing hole is communicated with the low pressure interval and the oil passing gap.

[0011] Preferably, the crankshaft is provided with an oil conveying hole, and the oil conveying hole is communicated with the oil passing hole and the low pressure interval respectively.

[0012] Preferably, the inner circumferential wall of the sealing cover is in the shape of a volute, and the distance between the inner circumferential wall of the sealing cover and the impeller gradually increases within a range of 360° in the rotation direction of the crankshaft.

[0013] Preferably, the compression cylinder assembly comprises an upper cylinder cover, a cylinder body mechanism and a lower cylinder cover arranged in sequence, and the oil suction hole is arranged on the upper cylinder cover, the cylinder body mechanism or the lower cylinder cover.

[0014] Preferably, the cylinder body mechanism comprises at least two cylinder bodies, and an intermediate plate is arranged between adjacent two cylinder bodies, and the oil suction hole is arranged on the upper cylinder cover, the intermediate plate or the lower cylinder cover.

[0015] Preferably, a shaft neck part of the lower cylinder cover is provided with a sealing structure, one end of the oil passing hole penetrating through the crankshaft is located in the lower cylinder cover, and the sealing structure isolates the oil passing hole from the high pressure area.

[0016] Preferably, the application further comprises a muffler, the muffler is fixed on the lower cylinder cover, the sealing structure is protruded in the muffler, the shaft neck of the lower cylinder cover is inserted into the sealing structure for sealing, the end part of the crankshaft is spaced apart from the sealing structure by a certain distance to form a sealing cavity, and the oil passing gap is communicated with the oil passing hole through the sealing cavity.

[0017] Preferably, the partition plate is provided with a first sleeve hole, and the partition plate is sleeved on the upper cylinder cover through the first sleeve hole.

[0018] Preferably, the partition is provided with an oil return hole, which is connected to the oil storage chamber and the high-pressure zone respectively.

[0019] Preferably, the impeller includes a fixed ring and blades. The fixed ring is sleeved on the crankshaft, and a plurality of blades are provided and fixed on the fixed ring in a circumferentially distributed manner. The low-pressure gap is left between the inner wall of the blades and the crankshaft.

[0020] Preferably, the oil passage clearance includes one or more of the clearances between the crankshaft and the upper cylinder head, between the crankshaft and the cylinder block mechanism, and between the crankshaft and the lower cylinder head.

[0021] Preferably, the sealing cover has a through hole, the crankshaft rotates through the through hole, and the sealing element is disposed between the crankshaft and the through hole.

[0022] Preferably, the sealing cover and the partition are fixedly connected by fastening bolts;

[0023] The sealing cover has a first hole, and the partition has a corresponding second hole. The fastening bolt passes through the first hole and is threadedly connected to the second hole.

[0024] The present invention also provides a vehicle including the above-mentioned compressor, which effectively promotes the circulation of lubricating oil on the high-pressure side of the compressor and prevents lubricating oil from leaking to the low-pressure side of the compressor.

[0025] A vehicle includes a refrigeration device, said refrigeration device including any of the compressors described above.

[0026] Beneficial effects:

[0027] The compressor provided by this invention has a partition that divides the compressor's internal cavity into a high-pressure zone and a low-pressure zone. The portion of the crankshaft facing away from the compression cylinder assembly is located in the low-pressure zone, while the portion facing the compression cylinder assembly is located in the high-pressure zone. An oil sump is provided in the high-pressure zone, and the compression cylinder assembly has an oil suction port connected to the oil sump. The crankshaft, sealing cover, and partition together form an oil storage chamber located on the side where the low-pressure zone is located. An oil passage gap is provided between the outer wall of the crankshaft and the inner wall of the compression cylinder assembly, located in the high-pressure zone. A low-pressure gap is left between the portion of the impeller near the partition and the crankshaft, located in the low-pressure zone. The oil suction port connects to the oil storage chamber on the low-pressure zone side and also to the oil passage gap on the high-pressure zone side through the low-pressure gap. When the compressor is working, the motor drives the crankshaft to rotate, causing the crankshaft to drive the impeller to rotate. The pressure at the center of the impeller decreases, while the pressure on the outer ring of the impeller increases. The decrease in the pressure at the center of the impeller allows lubricating oil from the oil sump to be drawn into the oil suction port. Part of the lubricating oil entering the suction hole enters the oil passage gap in sequence to cool and lubricate the high-pressure area; the other part enters the oil storage chamber through the low-pressure gap, thereby preventing this part of the lubricating oil from leaking into the low-pressure area of ​​the compressor.

[0028] The vehicle provided by the present invention includes the above-mentioned compressor, which can effectively promote the circulation of lubricating oil on the high-pressure side of the compressor and prevent lubricating oil from leaking to the low-pressure side of the compressor. Attached Figure Description

[0029] Figure 1 This is a partial structural schematic diagram of the compressor provided by the present invention from one perspective;

[0030] Figure 2 This is a partial structural schematic diagram of the compressor provided by the present invention from another perspective;

[0031] Figure 3 This is a partial structural schematic diagram of the compressor provided by the present invention from another perspective;

[0032] Figure 4 This invention was developed in Figure 2 Cross-sectional view at point A in the middle;

[0033] Figure 5 This invention was developed in Figure 2 Cross-sectional view at point B;

[0034] Figure 6 This invention was developed in Figure 2 A cross-sectional view at point C in the middle;

[0035] Figure 7 This invention was developed in Figure 3 A cross-sectional view at point D;

[0036] Figure 8 This is a schematic diagram of the impeller structure of the compressor provided by the present invention;

[0037] Figure 9 This is a longitudinal sectional view of the impeller of the compressor provided by the present invention.

[0038] In the picture:

[0039] 1. Crankshaft; 101. Oil reservoir; 11. Oil passage hole; 12. Oil supply hole;

[0040] 2. Compression cylinder assembly; 21. Upper cylinder head; 211. Oil suction port; 22. Lower cylinder head; 23. Cylinder block; 24. Intermediate plate;

[0041] 3. Impeller; 31. Low-pressure compartment;

[0042] 4. Sealing cover; 41. Perforation; 42. First hole;

[0043] 5. Partition plate; 51. Oil return hole; 52. First set of holes;

[0044] 6. Silencer; 601. Sealed cavity. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0049] This embodiment provides a compressor. (Refer to...) Figures 1 to 9 As shown, the compressor includes a housing (not shown), a motor (not shown), a crankshaft 1, a compression cylinder assembly 2, an impeller 3, a sealing cover 4, and a partition 5. The partition 5 divides the cavity within the housing into a high-pressure zone and a low-pressure zone. The compression cylinder assembly 2 is located in the high-pressure zone, and the motor is located in the low-pressure zone. A portion of the crankshaft 1 is located in the low-pressure zone, and the portion passing through the partition 5 rotatably passes through the compression cylinder assembly 2. The compression cylinder assembly 2 has an oil suction hole 211, which communicates with an oil sump (not shown) in the high-pressure zone. The sealing cover 4 is located in the low-pressure zone and fixed to the partition 5. The crankshaft 1 rotatably passes through the sealing cover 4. The crankshaft 1, the sealing cover 4, and the partition 5 together form an oil storage chamber 101. The impeller 3 is fixedly sleeved on the crankshaft 1 and located within the oil storage chamber 101. An oil passage gap is provided between the outer wall of the crankshaft 1 and the inner wall of the compression cylinder assembly 2. A low-pressure gap 31 is left between the part of the impeller 3 near the partition 5 and the crankshaft 1. The oil passage gap connects the low-pressure gap 31 and the oil suction hole 211 respectively.

[0050] In this embodiment, Figures 3 to 6 The portion of the crankshaft 1 located to the left of the partition 5 is in the low-pressure zone, while the portion located to the right of the partition 5 is in the high-pressure zone. An oil sump is located in the high-pressure zone, and the compression cylinder assembly 2 has an oil suction port 211 connected to the oil sump. The crankshaft 1, the sealing cover 4, and the partition 5 together form an oil storage chamber 101, located on the side where the low-pressure zone is located. An oil passage gap is provided between the outer wall of the crankshaft 1 and the inner wall of the compression cylinder assembly 2, located on the side where the high-pressure zone is located. A low-pressure gap 31 is left between the portion of the impeller 3 near the partition 5 and the crankshaft 1, located within the low-pressure zone. The oil suction port 211 connects to the oil storage chamber 101 facing the low-pressure zone via the low-pressure gap 31, and also connects to the oil passage gap facing the high-pressure zone. When the compressor is working, the motor drives the crankshaft 1 to rotate, causing the crankshaft 1 to drive the impeller 3 to rotate. The pressure at the center of the impeller 3 decreases, while the pressure on the outer ring of the impeller 3 increases. The pressure at the center of impeller 3 decreases, allowing lubricating oil in the oil sump to be drawn into the oil suction port 211. Part of the lubricating oil entering the oil suction port 211 flows into the oil passage gap to cool and lubricate the side where the high-pressure zone is located; the other part passes through the low-pressure interval 31 and enters the oil storage chamber 101, thereby preventing this part of the lubricating oil from leaking into the low-pressure zone of the compressor.

[0051] For example, Figure 4 and Figure 6 The diagram illustrates the flow path of the lubricating oil. When the compressor operates, the crankshaft 1 rotates, causing the impeller 3 to rotate. The pressure at the center of the impeller 3 decreases, drawing lubricating oil from the oil sump into the suction port 211. After the lubricating oil enters the suction port 211, Figure 4 The three arrows pointing to the right of the Chinese and North Korean symbols represent the flow direction of lubricating oil in the oil passage corresponding to the high-pressure area. Figure 4 The arrow pointing to the left of the center indicates the portion of lubricating oil that enters the low-pressure zone, passes through the low-pressure interval 31, and finally enters the oil reservoir 101.

[0052] Specifically, the pressure in the low-pressure zone is Ps, the pressure in the high-pressure zone is Pd1, the pressure in the oil passage 11 is Pd2, and the pressure in the oil return hole 51 on the outer ring of the oil storage chamber 101 is Pd3. Then, the following condition is satisfied: Ps << Pd2 < Pd1 < Pd3.

[0053] In this embodiment, an oil passage hole 11 is formed axially inside the crankshaft 1, which communicates with the low-pressure interval 31 and the oil passage gap. A portion of the lubricating oil in the oil suction hole 211 flows sequentially through the oil gap to the side where the high-pressure zone is located, then enters the oil passage hole 11 and flows towards the low-pressure zone, finally entering the low-pressure interval 31, and then from the low-pressure interval 31 into the oil storage chamber 101, thus achieving directional flow of this portion of lubricating oil. Specifically, Figure 4 The arrow pointing to the left inside the oil passage 11 indicates the direction of the lubricating oil flow.

[0054] More specifically, the crankshaft 1 has an oil supply hole 12, which is connected to the oil hole 11 and the low-pressure interval 31. Specifically, part of the lubricating oil in the oil suction hole 211 flows through the corresponding oil passage gap and oil passage 11 on the high-pressure side and then enters the low-pressure interval 31 through the oil supply hole 12, and finally enters the oil storage chamber 101 through the low-pressure interval 31. Figure 4 neutralization Figure 6 The downward-pointing arrow corresponding to the position of oil inlet 12 indicates the direction of the lubricating oil flow.

[0055] In this embodiment, the inner peripheral wall of the sealing cover 4 is volute-shaped, and the distance between the inner peripheral wall of the sealing cover 4 and the impeller 3 gradually increases within a 360° range along the rotation direction of the crankshaft 1. The shape of the inner peripheral wall of the sealing cover 4 can be referenced. Figure 7 As shown. This configuration, in conjunction with impeller 3, further achieves the effect of reducing the pressure at the center of impeller 3 and increasing the pressure on the outer ring of impeller 3 during its rotation.

[0056] Specifically, the impeller 3 includes a fixed ring 32 and blades 33. The fixed ring 32 is sleeved on the crankshaft 1. Several blades 33 are provided and are fixed on the fixed ring 32 in a circumferential distribution. A low-pressure gap 31 is left between the inner wall of the blades 33 and the crankshaft 1. Specifically, when the impeller 3 rotates, the pressure at the center of the impeller 3 decreases, which creates a certain negative pressure zone between the blades 33 and the crankshaft 1, thereby allowing a portion of the lubricating oil entering the oil suction hole 211 to enter the low-pressure gap 31.

[0057] Optionally, the retaining ring 33 can be fixed to the crankshaft 1 by setting a keyway and a key, or by screwing or interference fit, etc. No further restrictions are imposed here.

[0058] In this embodiment, the compression cylinder assembly 2 includes an upper cylinder head 21, a cylinder block mechanism, and a lower cylinder head 22 arranged sequentially. A partition 5 is fixed to the upper cylinder head 21, and an oil suction hole 211 is formed on the upper cylinder head 21, the cylinder block mechanism, or the lower cylinder head 22. Specifically, in this embodiment, the oil suction hole 211 is formed on the upper cylinder head 21. An oil passage clearance is formed between the crankshaft 1 and the upper cylinder head 21, between the crankshaft 1 and the cylinder block mechanism, and between the crankshaft 1 and the lower cylinder head 22.

[0059] Furthermore, the oil passage clearance includes one or more of the following: the clearance between crankshaft 1 and upper cylinder head 21, the clearance between crankshaft 1 and cylinder block mechanism, and the clearance between crankshaft 1 and lower cylinder head 22. Specifically, the oil passage clearance can consist of one clearance or multiple clearances. Depending on factors such as the size, number, and arrangement of the clearances, it is sufficient to ensure that lubricating oil can pass smoothly through the high-pressure area side, while also reliably lubricating the upper cylinder head 21, cylinder block mechanism, and lower cylinder head 22.

[0060] Furthermore, the cylinder block mechanism includes at least two cylinders 23, with an intermediate plate 24 between two adjacent cylinders 23, and an oil suction hole 211 is provided on the upper cylinder head 21, the intermediate plate 24, or the lower cylinder head 22. Specifically, in this embodiment, the cylinder block mechanism includes two cylinders 23 and an intermediate plate 24, with the intermediate plate 24 located between the two cylinders 23.

[0061] In this embodiment, the journal of the lower cylinder head 22 is provided with a sealing structure, and the oil passage hole 11 penetrates one end of the crankshaft 1 located inside the lower cylinder head 22. The sealing structure isolates the oil passage hole 11 from the high-pressure area, preventing direct communication between them. By setting the sealing structure, the oil passage hole 11 and the high-pressure area can be isolated, preventing direct communication between the two.

[0062] Furthermore, the compressor also includes a muffler 6, which is fixed to the lower cylinder head 22. A sealing structure protrudes from the muffler 6, and the journal of the lower cylinder head 22 is inserted into this sealing structure for sealing. The end of the crankshaft 1 forms a sealing cavity 601 at a certain distance from the sealing structure. The oil passage gap communicates with the oil passage hole 11 through the sealing cavity 601. Specifically, the sealing cavity 601 is connected between the oil passage gap and the oil passage hole 11, allowing lubricating oil flowing through the high-pressure area to enter the oil passage hole 11 via the sealing cavity 601. The sealing structure ensures that this portion of the lubricating oil does not leak.

[0063] Specifically, refer to Figure 9 As shown, the inner circumference of the impeller 3 includes a first sidewall 331 and a second sidewall 332. The first sidewall 331 is fixed to the outer circumference of the retaining ring 32, and a low-pressure gap 31 is left between the second sidewall 332 and the crankshaft 1. The inner circumference of the impeller 3 also includes a third sidewall 333, which is stepped with the second sidewall 332. The third sidewall 333 is concave outward relative to the crankshaft 1 to form a clearance area. The clearance area is provided to avoid the journal of the upper cylinder head 21.

[0064] Specifically, the partition 5 has a first sleeve hole 52, through which the partition 5 is fitted onto the upper cylinder head 21. Specifically, the first sleeve hole 52 is located at the center of the partition 5, and the fit between the first sleeve hole 52 and the fitted end of the upper cylinder head 21 is a transition fit or an interference fit, ensuring a reliable and secure connection between the partition 5 and the upper cylinder head 21, and effectively guaranteeing the sealing between the partition 5 and the upper cylinder head 21 to prevent lubricating oil leakage. The partition 5 and the upper cylinder head 21 can be fixedly connected using bolts or other connecting components.

[0065] Furthermore, the partition 5 has an oil return hole 51, which connects the oil storage chamber 101 and the high-pressure zone. Specifically, an oil sump is provided in the high-pressure zone, and the oil return hole 51 connects the oil storage chamber 101 and the oil sump. Specifically, the lubricating oil in the oil storage chamber 101 eventually flows back to the oil sump in the high-pressure zone through the oil return hole 51. The lubricating oil flowing back to the oil sump can continue to participate in the next round of circulation into the oil suction hole 211, thereby improving the circulation rate of the lubricating oil and preventing lubricating oil leakage.

[0066] Specifically, the sealing cover 4 has a through hole 41, through which the crankshaft 1 rotatably passes, and the sealing element is located between the crankshaft 1 and the through hole 41. Specifically, the through hole 41 and the crankshaft 1 are configured with a clearance fit, so that the sealing cover 4 remains fixed and does not interfere with the high-speed rotation of the crankshaft 1.

[0067] For example, the seal can be configured to achieve sealing through a mating dynamic ring and stationary ring, a labyrinth structure, packing, or a dry gas film within a hydrodynamic groove. When the seal is configured as a dynamic ring and a stationary ring, one of the dynamic rings is located at the outer edge of the perforation 41, and the other is fitted onto the crankshaft 1. The two work together to achieve an effective seal between the perforation 41 and the crankshaft 1.

[0068] Specifically, the sealing cover 4 and the partition 5 are fixedly connected by fastening bolts. The sealing cover 4 has a first hole 42, and the partition 5 has a corresponding second hole. The fastening bolts pass through the first hole 42 and are threaded into the second hole. Specifically, multiple fastening bolts, first holes 42, and second holes are provided in a one-to-one correspondence. This arrangement effectively ensures the reliability and effectiveness of the fixed connection between the sealing cover 4 and the partition 5.

[0069] This embodiment also provides a vehicle. The vehicle includes a refrigeration device, which includes the aforementioned compressor. Because the vehicle includes the aforementioned compressor, it can possess all the beneficial effects of the compressor, namely, effectively promoting the circulation of lubricating oil on the high-pressure side of the compressor and preventing lubricating oil leakage to the low-pressure side of the compressor.

[0070] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A compressor, characterized in that, The system includes a housing, a motor, a crankshaft (1), a compression cylinder assembly (2), an impeller (3), a sealing cover (4), and a partition (5). The partition (5) divides the cavity within the housing into a high-pressure zone and a low-pressure zone. The compression cylinder assembly (2) is located in the high-pressure zone, and the motor is located in the low-pressure zone. The compression cylinder assembly (2) is provided with an oil suction hole (211), which is connected to the oil sump in the high-pressure zone; The sealing cover (4) is located in the low-pressure area and fixed on the partition plate (5). A portion of the crankshaft (1) rotates through the sealing cover (4), the partition plate (5) and the compression cylinder assembly (2) in sequence. The impeller (3) is located inside the sealing cover (4) and fixedly sleeved on the crankshaft (1). An oil passage gap is provided between the outer wall of the crankshaft (1) and the inner wall of the compression cylinder assembly (2). An oil storage chamber (101) is formed inside the sealing cover (4). A low-pressure gap (31) is left between the impeller (3) and the crankshaft (1). The oil suction hole (211) is connected to the oil passage gap. The low-pressure gap (31) is connected to the oil passage gap and the oil storage chamber (101) respectively.

2. The compressor according to claim 1, characterized in that, The crankshaft (1) has an oil passage hole (11) axially formed inside, and the oil passage hole (11) is connected to the low pressure interval (31) and the oil passage gap.

3. The compressor according to claim 2, characterized in that, The crankshaft (1) has an oil supply hole (12), which is connected to the oil passage hole (11) and the low-pressure interval (31).

4. The compressor according to claim 1, characterized in that, The inner peripheral wall of the sealing cover (4) is volute-shaped, and the distance between the inner peripheral wall of the sealing cover (4) and the impeller (3) gradually increases within a range of 360° along the rotation direction of the crankshaft (1).

5. The compressor according to claim 2, characterized in that, The compression cylinder assembly (2) includes an upper cylinder head (21), a cylinder body mechanism, and a lower cylinder head (22) arranged in sequence. The oil suction hole (211) is opened on the upper cylinder head (21), the cylinder body mechanism, or the lower cylinder head (22).

6. The compressor according to claim 5, characterized in that, The cylinder mechanism includes at least two cylinders (23), with an intermediate plate (24) between two adjacent cylinders (23), and the oil suction hole (211) is opened on the upper cylinder cover (21), the intermediate plate (24), or the lower cylinder cover (22).

7. The compressor according to claim 5, characterized in that, The journal of the lower cylinder head (22) is provided with a sealing structure. The oil passage hole (11) passes through one end of the crankshaft (1) located inside the lower cylinder head (22). The sealing structure isolates the oil passage hole (11) from the high-pressure area and prevents direct communication between them.

8. The compressor according to claim 7, characterized in that, It also includes a muffler (6), which is fixed on the lower cylinder head (22). The muffler (6) has a protruding sealing structure inside. The journal of the lower cylinder head (22) is inserted into the sealing structure for sealing. The end of the crankshaft (1) forms a sealing cavity (601) at a certain distance from the sealing structure. The oil passage gap communicates with the oil passage hole (11) through the sealing cavity (601).

9. The compressor according to claim 5, characterized in that, The partition (5) has a first sleeve hole (52), and the partition (5) is sleeved on the upper cylinder head (21) through the first sleeve hole (52).

10. The compressor according to claim 1, characterized in that, The partition (5) has an oil return hole (51) that connects to the oil storage chamber (101) and the high-pressure zone respectively.

11. The compressor according to claim 1, characterized in that, The impeller (3) includes a fixed ring (32) and blades (33). The fixed ring (32) is sleeved on the crankshaft (1). Several blades (33) are provided and are fixed on the fixed ring (32) in a circumferential distribution. The low-pressure gap (31) is left between the inner wall of the blade (33) and the crankshaft (1).

12. The compressor according to claim 5, characterized in that, The oil passage clearance includes one or more of the clearances between the crankshaft (1) and the upper cylinder head (21), between the crankshaft (1) and the cylinder block mechanism, and between the crankshaft (1) and the lower cylinder head (22).

13. The compressor according to claim 1, characterized in that, The sealing cover (4) has a through hole (41), the crankshaft (1) rotates through the through hole (41), and the sealing element is located between the crankshaft (1) and the through hole (41).

14. The compressor according to claim 1, characterized in that, The sealing cover (4) and the partition plate (5) are fixedly connected by fastening bolts; The sealing cover (4) has a first hole (42), and the partition (5) has a corresponding second hole. The fastening bolt passes through the first hole (42) and is threadedly connected to the second hole.

15. A vehicle, characterized in that, It includes refrigeration equipment, which includes a compressor as described in any one of claims 1-14.

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