A silencer and compressor

Abstract

The utility model belongs to the technical field of silencer, disclose a kind of silencer and compressor.Including silencing main body and gasket, silencing main body is placed on gasket, gasket is placed on cylinder cover, through hole is set up on silencing main body, bolt is fastened on cylinder cover through through hole, set through hole axis direction is axis direction, through hole diameter direction is horizontal direction, and the edge of silencing main body extends to form crimping plate in horizontal direction, and crimping plate is crimped on gasket;The silencer and cylinder cover of prior art are not closely matched, leading to the problem of reduced sound attenuation effect and increased oil output rate.

Description

Technical Field

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

[0002] To reduce the noise of a rotary compressor during operation, a muffler needs to be installed on the cylinder head. The convex and concave lobes on the muffler change the cross-sectional area of ​​the airflow, thereby reducing the peak noise level.

[0003] In current technology, the muffler typically uses a radial sealing method during its fit with the cylinder head. First, the inner circumferential wall of the muffler wraps around the outer circumferential wall of the cylinder head and seals it with an interference fit. To accommodate assembly deformation, three sets of notches are provided at the lower edge of the muffler to increase the flexibility of the muffler wall and facilitate the wrapping of the muffler around the outer edge of the cylinder head. The muffler is then bolted onto the cylinder head. During subsequent compressor operation, the notches on the muffler will deform, ultimately leading to a decrease in the seal between the muffler and the cylinder head. This results in reduced noise reduction and allows oil from the bottom of the compressor to seep up through the gap between the muffler and the cylinder head, increasing the compressor's oil output. Utility Model Content

[0004] The purpose of this utility model is to provide a muffler and compressor to solve the problem that the muffler and cylinder head do not fit tightly in the existing technology, resulting in reduced muffler effect and increased oil output.

[0005] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a muffler, including a muffler body and a gasket. The muffler body is placed on the gasket, and the gasket is placed on the cylinder head. The axis direction of the through hole is set as the axial direction, and the radial direction of the through hole is horizontal. The edge of the muffler body extends in the horizontal direction to form a pressing plate, and the pressing plate is pressed onto the gasket.

[0006] Preferably, the cylinder head protrusion is provided with a crankshaft mounting platform, and the inner wall of the top of the muffler body is interference-fitted with the crankshaft mounting platform.

[0007] Preferably, the pressing plate, the cylinder head, and the gasket are interference-fitted.

[0008] Preferably, the distance between the lower side of the pressing plate and the top of the inner wall of the muffler body is H1, the thickness of the area through which the bolt passes in the cylinder head is H2, the thickness of the gasket is H3, the height of the crankshaft mounting platform is H, and H1+H2+H3<H.

[0009] Preferably, the edge of the gasket is formed with a flange extending in the axial direction, and the flange wraps around the side of the cylinder head.

[0010] Preferably, a crankshaft through hole is provided at the center of the silencing body, and a first limiting protrusion is formed on the edge of the crankshaft through hole, which is connected to the crankshaft mounting platform.

[0011] Preferably, the muffler further includes a second limiting protrusion located on the inner periphery of the pressing plate and protruding toward the cylinder head, the second limiting protrusion being in contact with the inner periphery of the gasket.

[0012] Preferably, a recessed area is formed on the side of the pressing plate near the center of the muffler body, the recessed area is pressed onto the cylinder head, and the recessed area has the through hole.

[0013] Preferably, the silencing body has three sets of recessed areas distributed circumferentially, and each recessed area corresponds to one of the through holes.

[0014] A compressor comprising the silencer described above.

[0015] Beneficial effects: By forming a pressure plate extending horizontally along the edge of the muffler body, the existing radial sealing method is changed to an axial sealing method, eliminating the need for notches on the muffler and avoiding leakage problems caused by notch deformation; the pressure plate and cylinder head press and clamp the gasket, allowing the muffler body, gasket and cylinder head to fit together tightly, improving the sealing ability of the muffler body and gasket at the cylinder head position inside the compressor, enhancing the reliability of the muffler body, strengthening the sealing around the muffler body, extending the muffler body's silencing capacity, and preventing the lower side oil from overflowing upwards, reducing the oil output rate. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the muffler installation of this utility model;

[0017] Figure 2 This is an exploded view of the silencer of this utility model;

[0018] Figure 3 This is a schematic diagram of the main body of the noise reduction device of this utility model;

[0019] Figure 4 This is a top view of the sound-absorbing body of this utility model.

[0020] In the figure: 1. Muffler body; 11. Through hole; 12. Crankshaft through hole; 13. First limiting protrusion; 14. Press plate; 15. Sinking area; 16. Second limiting protrusion; 2. Gasket; 21. Flanged edge; 3. Cylinder head; 31. Crankshaft mounting platform. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0025] In the current technology, since the muffler is directly installed on the cylinder head through a plug-in connection, high-frequency vibrations will be generated during the operation of the compressor. Deformation and leakage will occur at the joint between the muffler and the cylinder head, which will prevent the muffler and the cylinder head from forming a sealed cavity, thus reducing the muffler effect. At the same time, the oil on the lower side of the cylinder head will also rise, resulting in a high oil output rate.

[0026] To solve the above problems, such as Figures 1 to 4As shown, this utility model provides a muffler, including a muffler body 1 and a gasket 2. The muffler body 1 is placed on the gasket 2, and the gasket 2 is placed on the cylinder head 3. A through hole 11 is provided on the muffler body 1. Bolts pass through the through hole 11 and are fastened to the cylinder head 3. The axial direction of the through hole 11 is set as the axial direction, and the radial direction of the through hole 11 is horizontal. A pressing plate 14 is formed by extending the edge of the muffler body 1 horizontally. The pressing plate 14 is pressed onto the gasket 2.

[0027] In this invention, a pressure plate 14 is formed by extending horizontally along the edge of the muffler body 1, changing the existing radial sealing method to an axial sealing method. This eliminates the need for notches on the muffler and avoids leakage problems caused by notch deformation. Furthermore, a gasket 2 is added between the muffler body 1 and the cylinder head 3. By installing the gasket 2, a tighter interference fit can be achieved between the muffler body 1 and the gasket 2, and between the muffler body 1 and the cylinder head 3. After the gasket 2 is compressed, the sealing strength and sealing area with the muffler body 1 and the cylinder head 3 on both sides can be improved. Ultimately, the space inside the muffler body 1 can remain sealed for a long time, resulting in a better muffler effect. At the same time, it can also prevent the oil on the lower side of the cylinder head 3 from rising upwards, thus reducing the oil output rate of the compressor. The cylinder head 3 has a raised crankshaft mounting platform 31. The inner wall of the top of the muffler body 1 is interference-fitted with the crankshaft mounting platform 31, which can achieve a complete seal between the muffler body 1 and the crankshaft mounting platform 31, resulting in better muffler performance. In addition, the interference fit between the pressing plate 14, the cylinder head 3 and the gasket 2, and the gasket 2 clamped between the pressing plate 14 and the cylinder head 3 can further improve the sealing ability and make the muffler performance even better.

[0028] The edge of the gasket 2 has a flange 21 extending in the axial direction, which wraps around the side of the cylinder head 3. After the flange 21 is provided on the outer periphery of the gasket 2, the structure of the gasket 2 is close to that of a cap, which is fastened to the side and top of the cylinder head 3. The flange 21 is radially engaged with the side of the cylinder head 3 and axially engaged with the top surface of the cylinder head 3. Through the axial and radial engagement, the fit between the gasket 2 and the cylinder head 3 is tighter, which is beneficial to the stability of the gasket 2 installation, prevents the position of the gasket 2 from moving during the installation of the muffler, improves the sealing of the muffler during operation, and improves the muffler effect while reducing the oil leakage rate.

[0029] The cylinder head 3 has a raised crankshaft mounting platform 31. A crankshaft through-hole 12 is formed at the center of the muffler body 1. A first limiting protrusion 13 is formed on the edge of the crankshaft through-hole 12, and the first limiting protrusion 13 is grounded onto the crankshaft mounting platform 31. To further improve the muffler's sealing capability, the first limiting protrusion 13 is added at the position where the muffler body 1 mates with the raised crankshaft through-hole 12. This allows the first limiting protrusion 13 to engage with the bosses around the crankshaft through-hole 12. The first limiting protrusion 13 presses against the area around the crankshaft through-hole 12, further improving the sealing effect of the muffler body 1, and ultimately enhancing the muffler's sealing performance.

[0030] A pressure plate 14 extends outward from the circumference of the muffler body 1, forming a gap between the pressure plate 14 and the cylinder head 3. A gasket 2 is fitted into the gap. The pressure plate 14 protrudes from the edge of the muffler body 1. When the muffler body 1 is placed on the upper side of the cylinder head 3, the pressure plate 14 forms a placement gap with the upper surface of the cylinder head 3. The gasket 2 is placed in the gap. The thickness of the gap is less than the thickness of the gasket 2 when it is not compressed, so that the gasket 2 can be pressed by the pressure plate 14 to form an interference fit, which improves the sealing effect of the muffler body 1, enhances the muffler capacity, and reduces the oil leakage rate.

[0031] A recessed area 15 is formed on the side of the pressing plate 14 near the center of the muffler body 1. The recessed area 15 is pressed onto the cylinder head 3, and a through hole 11 is provided in the recessed area. By designing the recessed area 15, the mechanism of the cylinder head 3 does not need to be changed, so that the position of the muffler body 1 and the cylinder head 3 will not change before and after the improvement, and there is no need to adjust the length of the bolts, thus reducing the improvement cost.

[0032] The distance between the lower side of the pressing plate 14 and the top inner wall of the muffler body 1 is H1, the thickness in the area where the cylinder head 3 bolts pass through is H2, the thickness of the gasket 2 is H3, and the height of the crankshaft mounting platform 31 is H, where H1 + H2 + H3 < H. Because the muffler body 1 is pressed onto the gasket 2 via an interference fit, the gasket 2 deforms, causing its axial thickness to decrease, thus ensuring that H1 + H2 + H3 < H. This ensures that the top of the muffler body 1 is completely pressed against the crankshaft mounting platform 31, improving the seal between the muffler body 1 and the cylinder head 3, enhancing the muffler effect, and reducing oil leakage.

[0033] The muffler of this utility model also includes a second limiting protrusion 16, which is located on the inner periphery of the pressing plate 14 and protrudes towards the cylinder head 3. The second limiting protrusion 16 fits against the inner periphery of the gasket. The second limiting protrusion 16 can improve the overall sealing effect of the muffler, while reserving installation space for the gasket 2, facilitating the pre-positioning of the gasket 2. The protrusion height of the second limiting protrusion 16 is lower than the thickness of the gasket 2, which can effectively increase the tightness of the gasket 2 and improve the sealing effect.

[0034] The muffler body 1 has three sets of recessed areas 15 distributed circumferentially. The recessed areas 15 correspond one-to-one with the through holes 11. By retaining the recessed areas 15 and the through holes 11 on the muffler body 1, the cylinder head 3 can be modified without modification, reducing the improvement cost. The fitting method of the muffler body 1 before and after the improvement is the same.

[0035] This embodiment also provides a compressor, including a housing and a motor assembly and a pump assembly within the housing. The pump assembly includes a cylinder and an upper cylinder head and a lower cylinder head respectively disposed on both ends of the cylinder. In this embodiment, the cylinder head is the lower cylinder head, and the muffler is a lower muffler installed on the lower cylinder head.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A silencer, characterized in that, The device includes a muffler body (1) and a gasket (2). The muffler body (1) is placed on the gasket (2), and the gasket (2) is placed on the cylinder head (3). The muffler body (1) has a through hole (11). A bolt passes through the through hole (11) and is fastened to the cylinder head (3). The axis of the through hole (11) is set as the axial direction, and the radial direction of the through hole (11) is horizontal. The edge of the muffler body (1) extends in the horizontal direction to form a pressing plate (14), and the pressing plate (14) is pressed onto the gasket (2).

2. The silencer according to claim 1, characterized in that, The cylinder head (3) is provided with a crankshaft mounting platform (31) protruding from it, and the inner wall of the top of the muffler body (1) is interference-fitted with the crankshaft mounting platform (31).

3. The silencer according to claim 2, characterized in that, The press plate (14), the cylinder head (3), and the gasket (2) are interference-fitted.

4. The silencer according to claim 3, characterized in that, The distance between the lower side of the pressing plate (14) and the top inner wall of the muffler body (1) is H1, the thickness of the area through which the bolt passes in the cylinder head (3) is H2, the thickness of the gasket (2) is H3, the height of the crankshaft mounting platform (31) is H, and H1+H2+H3<H.

5. The silencer according to claim 1, characterized in that, The edge of the gasket (2) is formed with a flange (21) extending in the axial direction, and the flange (21) wraps around the side of the cylinder head (3).

6. The silencer according to claim 2, characterized in that, The silencing body (1) has a crankshaft through hole (12) at its center, and a first limiting protrusion (13) is formed on the edge of the crankshaft through hole (12), which is connected to the crankshaft mounting table (31).

7. The silencer according to claim 1 or 5, characterized in that, The muffler also includes a second limiting protrusion (16), which is located on the inner periphery of the pressing plate (14) and protrudes toward the cylinder head (3). The second limiting protrusion (16) fits against the inner periphery of the gasket.

8. The silencer according to claim 5, characterized in that, A recessed area (15) is formed on the side of the pressing plate (14) near the center of the muffler body (1). The recessed area (15) is pressed onto the cylinder head (3). The recessed area (15) has the through hole (11).

9. The silencer according to claim 6, characterized in that, The silencing body (1) has three sets of recessed areas (15) distributed circumferentially, and the recessed areas (15) correspond one-to-one with the through holes (11).

10. A compressor, characterized in that, Includes the muffler as described in any one of claims 1-9.

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