Compressor

Abstract

A compressor. Two ends of a cylinder head (2) are respectively connected to a silencer (1) and a cylinder (3); a skirt portion (12) of the silencer (1) is provided with at least one first flow-through structure passing through in an axial direction, and the cylinder (3) is provided with at least one second flow-through structure passing through in the axial direction, the at least one first flow-through structure and the at least one second flow-through structure being staggered in the axial direction; and an oil sump is arranged below the cylinder (3), and lubricating oil can be deflected to the oil sump through the first flow-through structure and the second flow-through structure.

Description

compressor

[0001] This application claims priority to Chinese Patent Application No. 202411181027.5, filed with the Chinese Patent Office on August 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of compressor technology, and for example to a compressor. Background Technology

[0003] During compressor operation, the motor assembly drives the crankshaft to rotate, and the pump assembly compresses the gas to perform work. Currently, most vertical rotor compressors use a direct vertical connection between the oil sump and the upper cavity, while some use a barrier cover to separate the oil sump and the exhaust chamber. The vertical connection exposes the oil sump to greater impact from the compressor's internal exhaust oil return, easily causing oil level instability and affecting compressor reliability. Installing a barrier cover not only increases assembly steps but also affects oil return, preventing the lubricating oil from quickly returning to the oil sump after separation from the refrigerant, and also increases the compressor's weight. Summary of the Invention

[0004] This application proposes a compressor that can ensure the smooth return of lubricating oil to the oil sump while stabilizing the oil level, thereby improving the reliability of the compressor.

[0005] This application provides a compressor, including: a housing, a muffler, and a pump body fixed to the inner wall of the housing. The pump body includes a cylinder head and a cylinder. The two ends of the cylinder head are respectively connected to the muffler and the cylinder. The muffler includes a muffler cavity and a skirt portion connected to the outer periphery of the muffler cavity. The skirt portion is provided with at least one first flow passage structure extending axially. The cylinder is provided with at least one second flow passage structure extending axially. At least one first flow passage structure and at least one second flow passage structure are staggered axially. An oil sump is provided below the cylinder, and lubricating oil can be deflected to the oil sump through the first flow passage structure and the second flow passage structure.

[0006] In some embodiments, at least one first flow passage structure and at least one second flow passage structure are arranged axially spaced apart to form a buffer zone between the at least one first flow passage structure and the at least one second flow passage structure.

[0007] In some embodiments, the cylinder includes a cylinder body and an extension portion connected to the outer periphery of the cylinder body, the extension portion being fixedly connected to the inner wall of the housing, and at least one second flow passage structure being disposed on the extension portion.

[0008] In some embodiments, the outer diameter of the cylinder head is smaller than the outer diameter of the cylinder, and the second flow passage structure is exposed on the outer periphery of the cylinder head.

[0009] In some embodiments, the first flow passage structure includes at least one of a first through hole and a notch, the notch being recessed along the outer periphery of the skirt portion toward the axial direction of the muffler.

[0010] In some embodiments, the cylinder has a weight reduction notch on its outer extension and the muffler has a first through hole on its skirt, and the first through hole and the weight reduction notch are staggered.

[0011] In some embodiments, the axial flow area of ​​the first flow structure is S1, the axial flow area of ​​the second flow structure is S2, the total number of the first flow structures is n, the distance from the edge of the cylinder head to the edge of the cylinder is L, and the height of the first flow structure from the second flow structure is H. S1, S2, n, L, and H satisfy the following: when S1 < S2, H ≥ 0.75 × S1 / (2n × L); when S1 > S2, H ≥ 0.75 × S2 / (2n × L).

[0012] In some embodiments, the cylinder is provided with a vane groove, and at least one of the first flow passage structures is axially connected to the vane groove.

[0013] In some embodiments, the muffler is further provided with at least one mounting hole through which one end of a bolt can be connected to the cylinder head.

[0014] In some embodiments, the outer diameter of the muffler is smaller than the inner diameter of the housing, and there is a gap between the edge of the muffler and the inner wall of the housing, through which the lubricating oil can flow back to the oil sump. Attached Figure Description

[0015] The accompanying drawings used in the description of the embodiments of this application will be introduced below. The accompanying drawings described below are drawings of some embodiments related to this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0016] Figure 1 is a schematic diagram of the compressor provided in an embodiment of this application;

[0017] Figure 2 is a schematic diagram of the silencer provided in an embodiment of this application;

[0018] Figure 3 is a schematic diagram of the structure of the silencer provided in the embodiment of this application;

[0019] Figure 4 is a schematic diagram of the cylinder provided in an embodiment of this application;

[0020] Figure 5 is a schematic diagram of the cylinder provided in an embodiment of this application;

[0021] Figure 6 is a schematic diagram of the combination of the first flow passage structure and the second flow passage structure provided in the embodiment of this application.

[0022] In the picture:

[0023] 1. Muffler; 11. Muffler cavity; 12. Skirt; 13. First through hole; 14. Notch; 15. Mounting hole; 2. Cylinder head; 3. Cylinder; 31. Cylinder body; 32. Outer extension; 33. Weight reduction notch; 34. Sliding vane groove; 35. Second through hole; 4. Outer shell. Detailed Implementation

[0024] The present application will now be described in conjunction with the accompanying drawings and embodiments. The embodiments described herein are for illustrative purposes. For ease of description, only the parts of the structure relevant to the present application are shown in the drawings.

[0025] In the description of this application, unless otherwise expressly 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 meaning of the above terms in this application as appropriate.

[0026] In this application, unless otherwise expressly 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 being directly above or diagonally above the second feature, or indicating 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 being directly below or diagonally below the second feature, or indicating that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "left," and "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. In addition, the terms "first" and "second" are used for distinction in description and have no special meaning.

[0028] As shown in Figures 1 to 6, this application provides a compressor. The compressor includes: a housing 4, a muffler 1, and a pump body fixed to the inner wall of the housing 4. The pump body includes a cylinder head 2 and a cylinder 3. The two ends of the cylinder head 2 are respectively connected to the muffler 1 and the cylinder 3. The muffler 1 includes a muffler cavity 11 and a skirt 12 connected to the outer periphery of the muffler cavity 11. The skirt 12 is provided with at least one first flow passage structure extending axially. The cylinder 3 is provided with at least one second flow passage structure extending axially. The at least one first flow passage structure and the at least one second flow passage structure are staggered axially. An oil sump is provided below the cylinder 3, and lubricating oil can flow to the oil sump through the first flow passage structure and the second flow passage structure. Compared to related technologies, at least one first flow passage structure and at least one second flow passage structure are staggered in the circumferential direction, which can increase the return path of lubricating oil, prevent lubricating oil from falling vertically into the oil sump, reduce the impact force of lubricating oil return, and enable smooth return of lubricating oil while ensuring oil level stability. At the same time, the first flow passage structure and the second flow passage structure can reduce the weight of the compressor, and by directly using the muffler 1, there is no need to install an additional oil stabilizing structure, which can reduce the weight of the compressor.

[0029] Optionally, at least one first flow passage structure and at least one second flow passage structure are arranged axially at intervals to form a buffer zone between the at least one first flow passage structure and at least one second flow passage structure, so as to reduce the impact force of the lubricating oil and ensure the stability of the oil surface.

[0030] Optionally, the cylinder 3 includes a cylinder body 31 and an extension 32 connected to the outer periphery of the cylinder body 31. The extension 32 is fixedly connected to the inner wall of the outer casing 4. At least one second flow passage structure is disposed on the extension 32 so that the extension 32 can receive the returned lubricating oil, so that the lubricating oil passes through the extension 32 to reduce the impact force, and then flows back through at least one second flow passage structure.

[0031] Optionally, the outer diameter of the cylinder head 2 is smaller than the outer diameter of the cylinder 3, and the second flow passage structure is exposed on the outer periphery of the cylinder head 2 to prevent the cylinder head 2 from interfering with the return flow of lubricating oil.

[0032] Optionally, the first flow passage structure includes at least one of a first through hole 13 and a notch 14, wherein the notch 14 is recessed along the outer periphery of the skirt portion 12 toward the axis of the muffler 1. Exemplarily, the edge of the skirt portion 12 is provided with at least one notch 14, and the skirt portion 12 is provided with at least one first through hole 13, allowing lubricating oil to flow back to the oil sump through the first through hole 13, the notch 14, and the second flow passage structure, thereby increasing the lubricating oil return speed and reducing the weight of the muffler 1.

[0033] In some embodiments, the outer extension 32 of the cylinder 3 is provided with a weight reduction notch 33, and the skirt 12 of the muffler 1 is provided with a first through hole 13. The first through hole 13 and the weight reduction notch 33 are staggered, and the first through hole 13 corresponds to the area of ​​the outer extension 32 that does not include the weight reduction notch 33. For example, the cylinder 3 has at least one weight-reducing notch 33 on its edge and at least one second through hole 35. At least one notch 14 and at least one weight-reducing notch 33 are staggered vertically, and the first through hole 13 corresponds to the area of ​​the extension portion 32 that does not include the weight-reducing notch 33. This allows the lubricating oil to first contact the skirt portion 12, then through the first through hole 13 or notch 14, and then through the extension portion 32, and finally flow out through the weight-reducing notch 33 or the second through hole 35. This increases the flow path of the lubricating oil, reduces the impact force of the lubricating oil, and ensures that the lubricating oil can return to the oil sump through the first through hole 13, notch 14, second through hole 35 and weight-reducing notch 33, thus ensuring a stable oil level. This can improve the return speed of the lubricating oil and reduce the weight of the cylinder 3.

[0034] In some embodiments, the second flow passage structure may be composed of a second through hole 35 provided on the extension portion 32 of the cylinder 3, or a weight reduction notch 33 provided on the extension portion 32 of the cylinder 3, or both. That is, the second flow passage structure may include at least one of the second through hole 35 and the weight reduction notch 33.

[0035] In some embodiments, in order to optimize the oil stabilization structure and ensure the stability of the oil level in the oil sump, the axial flow area of ​​the first flow structure is S1 (shaded area in Figure 3), the axial flow area of ​​the second flow structure is S2 (shaded area in Figure 5), the total number of the first through holes 13 and notches 14 is n, the length of the distance between the edge of the cylinder head 2 and the edge of the cylinder 3 is L, and the height of the first flow structure from the second flow structure is H. Among them, S1, S2, n, L and H satisfy: when S1 < S2, H ≥ 0.75 × S1 / (2n × L), when S1 > S2, H ≥ 0.75 × S2 / (2n × L).

[0036] Optionally, the cylinder 3 is provided with a vane groove 34, and at least one first flow passage structure is axially connected to the vane groove 34, which can spray lubricating oil onto the blade that is slidably connected to the vane groove 34, reduce the friction between the blade and the vane groove 34, and allow the blade to slide out of the vane groove 34 smoothly, thereby effectively isolating the intake chamber and the exhaust chamber.

[0037] Optionally, the muffler 1 is also provided with at least one mounting hole 15, through which one end of a bolt can be connected to the cylinder head 2. This arrangement improves the stability of the connection between the muffler 1 and the cylinder head 2.

[0038] Optionally, the outer diameter of the muffler 1 is smaller than the inner diameter of the housing 4, and there is a gap between the edge of the muffler 1 and the inner wall of the housing 4, allowing lubricating oil to flow back to the oil sump through the gap. For example, a first gap exists between the edge of the skirt portion 12 and the inner wall of the housing 4, facilitating the return of lubricating oil through the first gap and improving the return efficiency of the lubricating oil. Furthermore, at least one notch 14 is provided on the edge of the skirt portion 12 to prevent oil seal formation, further improving the return efficiency of the lubricating oil. A second gap exists between the edge of a portion of the extension portion 32 and the inner wall of the housing 4, the length of which is less than the length of the first gap. This allows lubricating oil passing through the first gap to flow to the top wall of the extension portion 32, and then return to the oil sump through the second gap, the second through-hole 35, or the weight-reducing notch 33. This increases the flow path of the lubricating oil, reduces the impact force of the lubricating oil return, improves the stability of the oil surface in the oil sump, and the weight-reducing notch 33 on the edge of the extension portion 32 prevents oil seal formation, improves the return efficiency of the lubricating oil, and reduces the weight of the compressor.

Claims

1. A compressor, comprising: The housing (4), the muffler (1), and the pump body fixed to the inner wall of the housing (4) are provided. The pump body includes a cylinder head (2) and a cylinder (3). The two ends of the cylinder head (2) are connected to the muffler (1) and the cylinder (3) respectively. The muffler (1) includes a muffler cavity (11) and a skirt (12) connected to the outer periphery of the muffler cavity (11). The skirt (12) is provided with at least one first flow passage structure that runs through the axial direction. The cylinder (3) is provided with at least one second flow passage structure that runs through the axial direction. At least one first flow passage structure and at least one second flow passage structure are staggered along the axial direction. An oil sump is provided below the cylinder (3). Lubricating oil can flow through the first flow passage structure and the second flow passage structure to the oil sump.

2. The compressor according to claim 1, wherein, At least one first flow passage structure and at least one second flow passage structure are arranged axially to form a buffer zone between the at least one first flow passage structure and the at least one second flow passage structure.

3. The compressor according to claim 2, wherein, The cylinder (3) includes a cylinder body (31) and an extension (32) connected to the outer periphery of the cylinder body (31). The extension (32) is fixedly connected to the inner wall of the outer shell (4), and at least one second flow passage structure is disposed on the extension (32).

4. The compressor according to claim 3, wherein, The outer diameter of the cylinder head (2) is smaller than the outer diameter of the cylinder (3), and the second flow passage structure is exposed on the outer periphery of the cylinder head (2).

5. The compressor according to claim 1, wherein, The first flow passage structure includes at least one of a first through hole (13) and a notch (14), the notch (14) being recessed along the outer periphery of the skirt portion (12) toward the axis of the muffler (1).

6. The compressor according to claim 5, wherein, The cylinder (3) has a weight reduction notch (33) on its outer extension (32), and the muffler (1) has a first through hole (13) on its skirt (12). The first through hole (13) and the weight reduction notch (33) are staggered.

7. The compressor according to claim 3, wherein, The axial flow area of ​​the first flow structure is S1, the axial flow area of ​​the second flow structure is S2, the total number of the first flow structures is n, the distance from the edge of the cylinder head (2) to the edge of the cylinder (3) is L, and the height of the first flow structure from the second flow structure is H. S1, S2, n, L and H satisfy the following: when S1 < S2, H ≥ 0.75 × S1 / (2n × L), when S1 > S2, H ≥ 0.75 × S2 / (2n × L).

8. The compressor according to any one of claims 1-7, wherein, The cylinder (3) is provided with a vane groove (34), and at least one of the first flow passage structures is axially connected to the vane groove (34).

9. The compressor according to any one of claims 1-7, wherein, The muffler (1) is also provided with at least one mounting hole (15), one end of which can pass through the mounting hole (15) and be connected to the cylinder head (2).

10. The compressor according to any one of claims 1-7, wherein, The outer diameter of the muffler (1) is smaller than the inner diameter of the outer shell (4), and there is a gap between the edge of the muffler (1) and the inner wall of the outer shell (4), through which the lubricating oil can flow back to the oil sump.

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