A silencer sealing structure and a compressor

Abstract

This utility model relates to the field of compressor technology, and more particularly to a muffler sealing structure and a compressor. The muffler sealing structure includes a muffler, a cylinder head, a seal, and several mounting components. A step is protruding horizontally from the outer periphery of the cylinder head. The seal is placed on the step, and its end face has a groove. The edge of the muffler extends axially and is embedded in the groove. Several mounting components pass through the muffler and connect to the cylinder head. Compared to the prior art, this muffler sealing structure adds a step to the cylinder head and an additional seal between the muffler and the cylinder head to achieve axial sealing. Simultaneously, the groove embedded in the edge of the muffler achieves radial sealing through its clamping action. This makes the sealing method of the muffler sealing structure a radial + axial sealing method, enhancing the airtightness between the muffler and the cylinder head and preventing leakage at the connection between the muffler and the cylinder head.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a muffler sealing structure and a compressor. Background Technology

[0002] A compressor typically consists of an upper cover, a lower cover, a housing, a motor fixed inside that provides rotational power, and a pump body that compresses the refrigerant.

[0003] In existing technology, the muffler of a rotary compressor uses a radial sealing method with the cylinder head, achieved through an interference fit between the outer edge of the cylinder head and the inner wall of the muffler. In addition to the interference fit, three rectangular notches are designed at the lower edge of the muffler to accommodate deformation during assembly. During compressor operation, the gaps created by the deformation of these three notches negatively impact the muffler's sealing performance, causing leakage at the notch locations.

[0004] Therefore, there is an urgent need for a silencer sealing structure and compressor to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a muffler sealing structure and compressor that can enhance the airtightness between the muffler and the cylinder head and prevent leakage at the connection between the muffler and the cylinder head.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A muffler sealing structure includes: a muffler, a cylinder head, a seal, and several mounting components. The cylinder head has a step extending horizontally from its outer periphery. The seal is placed on the step and has a groove on its end face. The edge of the muffler extends axially and is embedded in the groove. Several mounting components pass through the muffler and are connected to the cylinder head.

[0008] As a preferred technical solution of the above-mentioned muffler sealing structure, the height of the muffler is H1, the height of the step is H2, the height of the seal is H3, and the height of the cylinder head is H, wherein H1+H2+H3<H.

[0009] As a preferred technical solution of the above-mentioned muffler sealing structure, the sealing element is a rubber component.

[0010] As a preferred technical solution of the above-mentioned muffler sealing structure, the sealing element includes a first connecting block and a second connecting block that are connected to each other. The height of the first connecting block is greater than the height of the second connecting block, so that a stepped surface is formed between the first connecting block and the second connecting block. The stepped surface cooperates with the outer wall of the cylinder head to form a groove, and the end face of the muffler abuts against the end face of the second connecting block.

[0011] As a preferred technical solution of the above-mentioned muffler sealing structure, the first connecting block and the second connecting block are integrally formed.

[0012] As a preferred technical solution of the above-mentioned muffler sealing structure, the inner wall of the muffler is interference-fitted with the outer wall of the cylinder head.

[0013] As a preferred technical solution of the above-mentioned muffler sealing structure, the sealing element includes an outer ring, an inner ring, and a bottom surface connected between the outer ring and the inner ring. A gap is left between the outer ring and the inner ring to form the groove. One end of the muffler is inserted into the groove and abuts against the bottom surface.

[0014] As a preferred technical solution of the above-mentioned muffler sealing structure, the inner wall of the muffler is clearance-fitted with the outer wall of the cylinder head, and the two ends of one of the groove walls abut against the inner wall of the muffler and the outer wall of the cylinder head, respectively.

[0015] As a preferred technical solution of the above-mentioned muffler sealing structure, the muffler includes a muffler cover, the muffler cover is provided with a plurality of mounting portions recessed at intervals along the axial direction, the mounting portions are pressed onto the cylinder head, the mounting portions are provided with a plurality of mounting holes, and the plurality of mounting holes are provided in a one-to-one correspondence with a plurality of mounting parts.

[0016] A compressor includes a cylinder, and the compressor further includes a muffler sealing structure as described in any of the preferred embodiments above, the muffler sealing structure being disposed at the end of the cylinder.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides a muffler sealing structure, which includes a muffler, a cylinder head, a seal, and several mounting components. The cylinder head has a step extending horizontally along its outer periphery. The seal is placed on the step, and its end face has a groove. The edge of the muffler extends axially and is embedded in the groove. Several mounting components pass through the muffler and connect to the cylinder head. Compared to existing technologies, this muffler sealing structure adds a step to the cylinder head and an additional seal between the muffler and the cylinder head to achieve axial sealing. Simultaneously, the edge of the muffler is embedded in the groove, achieving radial sealing through the groove's clamping action. This makes the sealing method of the muffler sealing structure a radial + axial sealing method, enhancing the airtightness between the muffler and the cylinder head. Even if a notch is opened at the edge of the muffler, because the notch is sealed within the groove, deformation of the notch will not affect the airtightness, preventing leakage at the connection between the muffler and the cylinder head.

[0019] This invention also provides a compressor, which includes a cylinder and the aforementioned muffler sealing structure, the muffler sealing structure being disposed at the end of the cylinder. Compared with the prior art, this muffler sealing structure can enhance airtightness, improve leakage problems between the muffler and the cylinder head, improve the stability of the compressor, and increase the service life of the compressor. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0021] Figure 1 This is a first structural schematic diagram of the muffler sealing structure provided in this embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the second structure of the muffler sealing structure provided in this embodiment of the utility model;

[0023] Figure 3 This is a cross-sectional view of the muffler sealing structure provided in Embodiment 1 of this utility model;

[0024] Figure 4 This is a cross-sectional view of the muffler sealing structure provided in Embodiment 2 of this utility model.

[0025] In the picture:

[0026] 1. Muffler; 10. Muffler cover; 11. Mounting hole; 12. Mounting part; 2. Cylinder head; 21. Step; 3. Seal. Detailed Implementation

[0027] 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 present 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, not the entire structure.

[0028] In the description of this utility model, 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 utility model based on the specific circumstances.

[0029] 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.

[0030] 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] like Figures 1 to 4As shown, this utility model provides a muffler sealing structure. The muffler sealing structure includes: a muffler 1, a cylinder head 2, a sealing element 3, and several mounting parts. Specifically, the cylinder head 2 has a step 21 protruding horizontally on its outer periphery. The sealing element 3 is placed on the step 21, and the end face of the sealing element 3 has a groove. The edge of the muffler 1 extends axially and is embedded in the groove. Several mounting parts pass through the muffler 1 and connect to the cylinder head 2. In this embodiment, the horizontal direction refers to the plane where the end face of the cylinder head 2 is located, and the axial direction refers to the direction perpendicular to the horizontal direction. Compared to existing technologies, this muffler sealing structure adds a step 21 to the cylinder head 2 and adds a sealing element 3 between the muffler 1 and the cylinder head 2 to achieve axial sealing. At the same time, the edge of the muffler 1 is embedded in a groove, and radial sealing is achieved by clamping the groove. This makes the sealing method of the muffler sealing structure a radial + axial sealing method, which enhances the airtightness between the muffler 1 and the cylinder head 2. Even if there is a notch on the edge of the muffler 1, the notch is sealed in the groove, and even if the notch is deformed, it will not affect the airtightness, thus preventing leakage at the connection between the muffler 1 and the cylinder head 2.

[0032] Optionally, the height of the muffler 1 is H1, the height of the step 21 is H2, the height of the seal 3 is H3, and the height of the cylinder head 2 is H, where H1 + H2 + H3 < H. Specifically, the muffler sealing structure is a radial + axial sealing structure consisting of the step 21 added to the outer edge of the muffler 1 and the cylinder head 2, and the seal 3 placed between them. Without changing the existing structure of the muffler 1, the step 21 is added and the seal 3 is placed on the step 21 without changing the height of the cylinder head 2. This satisfies the condition that the sum of the height of the muffler 1, the height of the step 21, and the thickness of the seal 3 is less than the height of the cylinder head 2, i.e., H1 + H2 + H3 < H, thereby enhancing the axial sealing effect between the muffler 1 and the cylinder head 2.

[0033] Optionally, the seal 3 is made of rubber. Specifically, the seal 3 is a rubber gasket. When the muffler 1 and the cylinder head 2 simultaneously compress the seal 3, the deformation of the seal 3 can enhance the sealing effect between the muffler 1 and the cylinder head 2.

[0034] In one embodiment, the seal 3 includes a first connecting block and a second connecting block connected to each other. The height of the first connecting block is greater than the height of the second connecting block, so that a stepped surface is formed between the first connecting block and the second connecting block. The stepped surface mates with the outer wall of the cylinder head 2 to form a groove. The edge of the muffler 1 extends axially and is embedded in the groove. The end face of the muffler 1 abuts against the end face of the second connecting block. Specifically, the inner wall of the muffler 1 abuts against the outer wall of the cylinder head 2, and the stepped surface abuts against the outer wall of the muffler 1, which can form two layers of radial seals, while also cooperating with the axial seal, further enhancing the sealing effect between the muffler 1 and the cylinder head 2. Furthermore, the first connecting block and the second connecting block are integrally formed, which can improve the stability of the seal 3 and increase the service life of the seal 3.

[0035] Furthermore, the inner wall of the muffler 1 is press-fitted with the outer wall of the cylinder head 2. To facilitate assembly, a notch can be made at the edge of the muffler 1. The height of the notch is no greater than the depth of the groove, and the notch is sealed inside the groove. Even if the notch deforms, it will not affect the airtightness.

[0036] In another embodiment, the seal 3 includes an outer ring, an inner ring, and a bottom surface connecting the outer ring and the inner ring. A gap is left between the outer ring and the inner ring to form a groove. The edge of the muffler 1 extends axially into the groove and abuts against the bottom surface. Specifically, the two opposite groove walls abut against the inner wall and outer wall of the muffler 1, respectively, forming two layers of radial seals, which can enhance the sealing effect between the muffler 1 and the cylinder head 2.

[0037] Furthermore, the inner wall of the muffler 1 is clearance-fitted with the outer wall of the cylinder head 2, and the two ends of one of the groove walls abut against the inner wall of the muffler 1 and the outer wall of the cylinder head 2, respectively. Specifically, there is a gap between the inner wall of the muffler 1 and the outer wall of the cylinder head 2, the groove wall inside the groove is located between the inner wall of the muffler 1 and the outer wall of the cylinder head 2, and the two ends of the groove wall abut against the inner wall of the muffler 1 and the outer wall of the cylinder head 2, respectively, thereby improving the sealing effect between the muffler 1 and the cylinder head 2.

[0038] Optionally, the muffler 1 includes a muffler cover 10, which covers the cylinder head 2. The muffler cover 10 has a plurality of mounting portions 12 recessed at intervals along the axial direction. The mounting portions 12 are pressed onto the cylinder head 2. Each mounting portion 12 has a plurality of mounting holes 11, which correspond one-to-one with a plurality of mounting parts. The mounting parts pass through the mounting holes 11 and are connected to the cylinder head 2. Specifically, in this embodiment, three mounting portions 12 are evenly spaced circumferentially on the muffler cover 10. One end of the mounting part passes through the mounting hole 11 and is threaded to the cylinder head 2. The end face of the other end of the mounting part abuts against the end face of the mounting portion 12, improving the stability of the connection between the muffler 1 and the cylinder head 2. Of course, in some other embodiments, the number of mounting holes 11 is determined according to the actual situation, which will not be elaborated here. Further, the mounting part is a bolt.

[0039] This utility model also provides a compressor, including a cylinder. The compressor further includes the muffler sealing structure described in any of the above embodiments, which is disposed at the end of the cylinder. The compressor also includes other essential components that constitute a compressor in the prior art. Compared with the prior art, this muffler sealing structure can enhance airtightness, improve the leakage problem between the muffler 1 and the cylinder head 2, improve the stability of the compressor, and increase the service life of the compressor.

[0040] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A silencer sealing structure, characterized in that, include: The cylinder head (2), the seal (3), and several mounting parts are provided. The cylinder head (2) has a step (21) extending horizontally on its outer periphery. The seal (3) is placed on the step (21). The end face of the seal (3) is provided with a groove. The edge of the muffler (1) extends axially and is embedded in the groove. Several mounting parts pass through the muffler (1) and are connected to the cylinder head (2).

2. The muffler sealing structure according to claim 1, characterized in that, The height of the muffler (1) is H1, the height of the step (21) is H2, the height of the seal (3) is H3, and the height of the cylinder head (2) is H, wherein H1+H2+H3<H.

3. The muffler sealing structure according to claim 1, characterized in that, The sealing element (3) is made of rubber.

4. The muffler sealing structure according to claim 1, characterized in that, The sealing element (3) includes a first connecting block and a second connecting block that are connected to each other. The height of the first connecting block is greater than the height of the second connecting block, so that a stepped surface is formed between the first connecting block and the second connecting block. The stepped surface cooperates with the outer wall of the cylinder head (2) to form the groove. The end face of the muffler (1) abuts against the end face of the second connecting block.

5. A muffler sealing structure according to claim 4, characterized in that, The first connecting block and the second connecting block are integrally formed.

6. The muffler sealing structure according to claim 4, characterized in that, The inner wall of the muffler (1) is interference-fitted with the outer wall of the cylinder head (2).

7. The muffler sealing structure according to claim 1, characterized in that, The sealing element (3) includes an outer ring, an inner ring, and a bottom surface connected between the outer ring and the inner ring. A gap is left between the outer ring and the inner ring to form the groove. One end of the muffler (1) is inserted into the groove and abuts against the bottom surface.

8. A muffler sealing structure according to claim 7, characterized in that, The inner wall of the muffler (1) is fitted with the outer wall of the cylinder head (2) with a clearance, and the two ends of one of the groove walls abut against the inner wall of the muffler (1) and the outer wall of the cylinder head (2) respectively.

9. A muffler sealing structure according to claim 1, characterized in that, The muffler (1) includes a muffler cover (10), which has a plurality of mounting portions (12) recessed at intervals along the axial direction. The mounting portions (12) are pressed onto the cylinder head (2). The mounting portions (12) are provided with a plurality of mounting holes (11), and the plurality of mounting holes (11) are provided in a one-to-one correspondence with the plurality of mounting parts.

10. A compressor, comprising a cylinder, characterized in that, The compressor further includes a muffler sealing structure as described in any one of claims 1-9, the muffler sealing structure being disposed at the end of the cylinder.

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