compressor

Abstract

A compressor is provided in which both ends of a cylinder head (2) are connected to a silencer (1) and a cylinder (3), respectively, the skirt portion (12) of the silencer (1) is provided with at least one first flow structure that penetrates in the axial direction, the cylinder (3) is provided with at least one second flow structure that penetrates in the axial direction, the at least one first flow structure and the at least one second flow structure are arranged alternately in the axial direction, an oil pan is provided below the cylinder (3), and lubricating oil can be returned to the oil pan via the first flow structure and the second flow structure.

Description

Technical Field

[0001] This application claims the priority of the Chinese patent application with application number 202411181027.5 filed with the China National Intellectual Property Administration on August 27, 2024, and the entire content of that application is incorporated into this application by reference.

[0002] The present application relates to the technical field of compressors, for example, to a compressor.

Background Art

[0003] During the operation of the compressor, the motor assembly drives the crankshaft to perform rotational motion, and the pump assembly achieves compression work on gas. Current vertical rotor compressors mostly adopt a direct vertical communication mode between the oil pan and the upper cavity, and some adopt a form of installing a blocking cover to separate the oil pan and the exhaust cavity. In the vertical communication mode, the oil pan is strongly impacted by the returned oil carried by the exhaust gas inside the compressor, which is prone to the problem of unstable oil level, affecting the reliability of the compressor. The installation of the blocking cover not only increases the process steps of the installation process, but also causes problems affecting oil return, which cannot ensure that the lubricating oil quickly flows back to the oil pan after being separated from the refrigerant, and at the same time increases the weight of the compressor.

Summary of the Invention

[0004] The present application proposes a compressor that can stabilize the oil level and improve the reliability of the compressor while ensuring that the lubricating oil smoothly flows back to the oil pan.

[0005] The present invention provides a compressor comprising a housing, a silencer, and a pump fixed to the inner wall of the housing, wherein the pump comprises a cylinder head and a cylinder, the ends of which are connected to the silencer and the cylinder, respectively, the silencer comprises a silencer chamber and a skirt portion connected to the outer circumference of the silencer chamber, the skirt portion is provided with at least one first flow passage structure that penetrates in the axial direction, the cylinder is provided with at least one second flow passage structure that penetrates in the axial direction, the at least one first flow passage structure and the at least one second flow passage structure are arranged alternately in the axial direction, and an oil pan is provided below the cylinder, and lubricating oil can be returned to the oil pan via the first flow passage structure and the second flow passage structure.

[0006] In some embodiments, the at least one first flow-through structure and the at least one second flow-through structure are spaced apart along the axial direction such that a buffer region is formed between them.

[0007] In some embodiments, the cylinder comprises a cylinder body and an extension connected to the outer circumference of the cylinder body, the extension being fixedly connected to the inner wall of the housing, and at least one of the second flow structures provided on the extension.

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

[0009] In some embodiments, the first flow structure comprises at least one of a first through-hole and a notch recessed in the axial direction of the silencer along the outer peripheral edge of the skirt portion.

[0010] In some embodiments, weight-reducing notches are provided on the outer portion of the cylinder, the first through-holes are provided on the skirt portion of the silencer, and the first through-holes and the weight-reducing notches are arranged alternately.

[0011] In some embodiments, the flow area in the axial direction of the first flow structure is defined as S1, the flow area in the axial direction of the second flow structure is defined as S2, the total number of the first flow structures is defined as n, the length from the edge of the cylinder head to the edge of the cylinder is defined as L, the height from the first flow structure to the second flow structure is defined as H, where S1, S2, n, L and H satisfy H≧0.75×S1 / (2n×L) when S1<S2, and satisfy H≧0.75×S2 / (2n×L) when S1>S2.

[0012] In some embodiments, the cylinder is provided with a sliding vane groove, and at least one of the first flow structures is in communication with the sliding vane groove in the axial direction.

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

[0014] In some embodiments, the outer diameter of the silencer is smaller than the inner diameter of the housing, a gap is formed between the edge of the silencer and the inner wall of the housing, and lubricating oil can pass through the gap and flow back to the oil pan. [BRIEF DESCRIPTION OF THE DRAWINGS]

[0015] The drawings that need to be used for describing the embodiments of the present application are explained below. The drawings in the following description are the drawings of some embodiments related to the present application, and those skilled in the art can also obtain other drawings based on the contents of the embodiments of the present application and these drawings without creative efforts.

[0016] [Figure 1] This is one of the structural schematic diagrams of the compressor according to the embodiments of the present application. [Figure 2] This is one of the structural schematic diagrams of the silencer according to the embodiments of the present application. [Figure 3]This is the second structural schematic diagram of the silencer according to the embodiments of the present application. [Figure 4] This is the first structural schematic diagram of the cylinder according to the embodiments of the present application. [Figure 5] This is the second structural schematic diagram of the cylinder according to the embodiments of the present application. [Figure 6] This is a structural schematic diagram of the combination of the first flow structure and the second flow structure according to the embodiments of the present application. [Description of Reference Signs]

[0017] 1... Silencer 11... Silencing chamber portion 12... Skirt portion 13... First through hole 14... Notch 15... Mounting hole 2... Cylinder head 3... Cylinder 31... Cylinder body 32... Outer extension portion 33... Weight-reducing notch 34... Slide vane groove 35... Second through hole 4... Housing [Mode for Carrying Out the Invention]

[0018] Hereinafter, the present application will be described with reference to the drawings and embodiments. The embodiments described herein are for the purpose of interpreting the present application. For convenience of explanation, only a part of the structures related to the present application are shown in the drawings.

[0019] In the description of the present application, unless otherwise clearly specified and limited, the terms "connected", "joined", and "fixed" should be understood in a broad sense, for example, they may be fixedly connected, may be detachably connected, may be integrated, may be mechanically connected, may be electrically connected, may be directly connected, may be indirectly connected through an intermediate medium, and may be a communication relationship inside two elements or an interaction relationship between two elements. A person skilled in the art can appropriately understand the meaning of the above terms in the present application.

[0020] In the present application, that a first feature is "on" or "under" a second feature may include direct contact between the first feature and the second feature, and may also include a state where the first feature and the second feature are not in direct contact but are in contact via another feature interposed therebetween. Further, that a first feature is "on", "above" and "on the top surface of" a second feature indicates that the first feature is directly above or obliquely above the second feature, or that the horizontal height of the first feature is higher than that of the second feature. That a first feature is "under", "below" and "on the bottom surface of" a second feature indicates that the first feature is directly below or obliquely below the second feature, or that the horizontal height of the first feature is lower than that of the second feature.

[0021] In the description of the present embodiment, the orientations and positional relationships such as the terms "upper", "lower", "left", and "right" are based on the orientations and positional relationships shown in the drawings, and are merely for the purpose of facilitating description and simplifying operations, and do not indicate or imply that the specified apparatus or element must necessarily 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.

[0022] As shown in Figures 1 to 6, the present invention provides a compressor. The compressor comprises a housing 4, a silencer 1, and a pump fixed to the inner wall of the housing 4. The pump comprises a cylinder head 2 and a cylinder 3. Both ends of the cylinder head 2 are connected to the silencer 1 and the cylinder 3, respectively. The silencer 1 comprises a silencer chamber 11 and a skirt portion 12 connected to the outer circumference of the silencer chamber 11. The skirt portion 12 is provided with at least one first flow passage structure that penetrates in the axial direction. The cylinder 3 is provided with at least one second flow passage structure that penetrates in the axial direction. The at least one first flow passage structure and the at least one second flow passage structure are arranged alternately along the axial direction. An oil pan is provided below the cylinder 3, and lubricating oil can be returned to the oil pan via the first and second flow passage structures. Compared to related technologies, by arranging at least one first flow-through structure and at least one second flow-through structure alternately along the axial direction, the circulation path of the lubricating oil is increased, preventing the lubricating oil from falling vertically into the oil pan, reducing the impact force caused by the circulation of the lubricating oil, achieving smooth circulation of the lubricating oil, and ensuring oil level stability. At the same time, the weight of the compressor can be reduced by using the first and second flow-through structures, and furthermore, since the silencer 1 is used directly and there is no need to install a separate oil stabilization structure, the weight of the compressor can be reduced.

[0023] Preferably, the at least one first flow structure and the at least one second flow structure are spaced apart along the axial direction so that a buffer region is formed between them, thereby reducing the impact force from the lubricating oil and ensuring the stability of the oil level.

[0024] Preferably, the cylinder 3 comprises a cylinder body 31 and an extension 32 connected to the outer circumference of the cylinder body 31. The extension 32 is fixedly connected to the inner wall of the housing 4. By providing at least one second flow-through structure on the extension 32, the extension 32 can receive the circulating lubricating oil, the impact force of the lubricating oil is reduced through the extension 32, and the oil circulates further through the at least one second flow-through structure.

[0025] Preferably, the outer diameter of the cylinder head 2 is smaller than the outer diameter of the cylinder 3, and the second flow structure is exposed on the outer circumference of the cylinder head 2, thereby preventing the cylinder head 2 from interfering with the flow of lubricating oil.

[0026] Preferably, the first flow structure comprises at least one of a first through hole 13 and a notch 14 recessed in the axial direction of the muffler 1 along the outer peripheral edge of the skirt portion 12. 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. Since the lubricating oil can flow through the first through hole 13, the notch 14 and the second flow structure to the oil pan, the flow velocity of the lubricating oil can be improved and the weight of the muffler 1 can be reduced.

[0027] In some embodiments, the outer portion 32 of the cylinder 3 is provided with a weight-reducing notch 33. The skirt portion 12 of the silencer 1 is provided with a first through hole 13. The first through holes 13 and the weight-reducing notches 33 are arranged alternately, and the first through holes 13 correspond to areas of the outer portion 32 that do not include the weight-reducing notches 33. Exemplarily, the edge of the cylinder 3 is provided with at least one weight-reducing notch 33. The cylinder 3 is provided with at least one second through hole 35. At least one notch 14 and at least one weight-reducing notch 33 are arranged alternately in the upper and lower positions, and the first through-hole 13 corresponds to a region of the extension 32 that does not include the weight-reducing notch 33. This allows the lubricating oil to first come into contact with the skirt portion 12, then pass through the first through-hole 13 or notch 14, then come into contact with the extension 32, and finally flow out through the weight-reducing notch 33 or second through-hole 35, thereby increasing the flow path of the lubricating oil, reducing the impact force of the lubricating oil, ensuring oil level stability as the lubricating oil flows back into the oil pan through the first through-hole 13, notch 14, second through-hole 35 and weight-reducing notch 33, improving the flow velocity of the lubricating oil, and reducing the weight of the cylinder 3.

[0028] In some embodiments, the second flow structure may consist of a second through-hole 35 provided in the outer portion 32 of the cylinder 3, or a weight-reducing notch 33 provided in the outer portion 32 of the cylinder 3, or both. That is, the second flow structure may include at least one of the second through-hole 35 and the weight-reducing notch 33.

[0029] In some embodiments, to optimize the oil stabilization structure and ensure the stability of the oil level in the oil pan, the axial flow area of the first flow structure is defined as S1 (the shaded area in Figure 3), the axial flow area of the second flow structure is defined as S2 (the shaded area in Figure 5), the total number of the first through holes 13 and the notches 14 is defined as n, the length from the edge of the cylinder head 2 to the edge of the cylinder 3 is defined as L, and the height from the first flow structure to the second flow structure is defined as H. Here, S1, S2, n, L and H satisfy H≧0.75×S1 / (2n×L) when S1<S2, and satisfy H≧0.75×S2 / (2n×L) when S1>S2.

[0030] Preferably, the cylinder 3 is provided with sliding vane grooves 34, and at least one first flow structure is communicated with the sliding vane grooves 34 in the axial direction, so that lubricating oil can be injected to the vanes slidably connected in the sliding vane grooves 34, the friction between the vanes and the sliding vane grooves 34 is reduced, the vanes can slide smoothly from the sliding vane grooves 34, and the suction chamber and the discharge chamber can be effectively isolated.

[0031] Preferably, the silencer 1 is further provided with at least one mounting hole 15, and one end of a bolt can pass through the mounting hole 15 to be connected to the cylinder head 2. In this way, the connection stability between the silencer 1 and the cylinder head 2 can be improved.

[0032] Preferably, the outer diameter of the silencer 1 is smaller than the inner diameter of the housing 4, and there is a gap between the edge of the silencer 1 and the inner wall of the housing 4, allowing lubricating oil to circulate to the oil pan through the gap. For example, having a first gap between the edge of the skirt portion 12 and the inner wall of the housing 4 makes it easier for lubricating oil to circulate through the first gap, improving the circulation efficiency of the lubricating oil. Furthermore, having at least one notch 14 on the edge of the skirt portion 12 prevents the formation of an oil seal and improves the circulation efficiency of the lubricating oil. A second gap exists between the edge of a portion of the outer extension 32 and the inner wall of the housing 4. The length of the second gap is smaller than the length of the first gap, allowing lubricating oil that has passed through the first gap to flow to the top wall of the outer extension 32 and then to return to the oil pan 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 caused by the return of the lubricating oil, and improves the stability of the oil level in the oil pan. Furthermore, at least one weight-reducing notch 33 is provided on the edge of the outer extension 32, which helps to avoid the formation of oil seals, improves the return efficiency of the lubricating oil, and reduces the weight of the compressor.

Claims

1. A compressor comprising a housing (4), a silencer (1), and a pump fixed to the inner wall of the housing (4), The pump comprises a cylinder head (2) and a cylinder (3), Both ends of the cylinder head (2) are connected to the silencer (1) and the cylinder (3), respectively. The silencer (1) comprises a sound-dampening chamber (11) and a skirt portion (12) connected to the outer circumference of the sound-dampening chamber (11). The skirt portion (12) is provided with at least one first flow-through structure that penetrates in the axial direction. The cylinder (3) is provided with at least one second flow-through structure that penetrates in the axial direction. At least one of the first flow-through structures and at least one of the second flow-through structures are arranged alternately in the axial direction. A compressor in which an oil pan is provided below the cylinder (3), and lubricating oil can be returned to the oil pan via the first and second flow structures.

2. The compressor according to claim 1, wherein at least one of the first flow structures and at least one of the second flow structures are arranged with an axial gap between them such that a buffer region is formed between them.

3. The compressor according to claim 2, wherein the cylinder (3) comprises a cylinder body (31) and an extension (32) connected to the outer circumference of the cylinder body (31), the extension (32) being fixedly connected to the inner wall of the housing (4), and at least one of the second flow structures being provided 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 structure is exposed on the outer circumference of the cylinder head (2).

5. The compressor according to claim 1, wherein the first flow structure comprises at least one of a first through hole (13) and a notch (14) recessed in the axial direction of the silencer (1) along the outer peripheral edge of the skirt portion (12).

6. The compressor according to claim 5, wherein a weight-reducing notch (33) is provided in the outer portion (32) of the cylinder (3), the first through hole (13) is provided in the skirt portion (12) of the silencer (1), and the first through hole (13) and the weight-reducing notch (33) are arranged alternately.

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

8. The compressor according to any one of claims 1 to 7, wherein the cylinder (3) is provided with a slide vane groove (34), and at least one of the first flow structures is in axial direction to communicate with the slide vane groove (34).

9. The compressor according to any one of claims 1 to 7, wherein the silencer (1) is further provided with at least one mounting hole (15), and one end of a bolt 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 to 7, wherein the outer diameter of the silencer (1) is smaller than the inner diameter of the housing (4), there is a gap between the edge of the silencer (1) and the inner wall of the housing (4), and the lubricating oil can pass through the gap and be returned to the oil pan.

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