A sealing structure, a compressor and an air conditioner having the same

Abstract

The present invention discloses a sealing structure and a compressor and an air conditioner having the sealing structure. The sealing structure comprises: a first joint surface, a second joint surface, and a sealing member. The first joint surface and the second joint surface are both provided with grooves, and the grooves of the first joint surface and the grooves of the second joint surface are arranged oppositely. The sealing member is deformably installed in the grooves, and the height of the sealing member is greater than the total depth after the grooves are joined. By designing the deformation amount on the sealing member, the contact area between the sealing member and the sealed surface can be increased when the sealing member acts on the sealed surface, and the sealing effect is improved by increasing the contact area, so that good sealing between components is achieved, and different deformation amounts are adapted to different sealing pressures, so that the applicable pressure range of the sealing structure is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing, and in particular to a sealing structure and a compressor and an air conditioner having the sealing structure. Background Art

[0002] With the rapid development of electric vehicles, the lightweight technology of the whole vehicle has developed rapidly. As a component of electric vehicles, electric compressors also put forward requirements for the lightweight of compressors, so aluminum shell scroll compressors came into being. In the structural design of aluminum shell scroll compressors, a segmented structure is generally adopted, so the sealing between the segmented structures is particularly important. Most of the current compressors use O-rings, gaskets or combined seals, but these sealing methods have defects. O-rings will affect the sealing performance due to the cumulative tolerance of parts processing, which will cause changes in compression rate; gaskets have a small applicable pressure range and will leak when the sealing pressure is high; using multiple sealing rings or a combination of multiple seals can improve the sealing performance, but it will greatly increase the production difficulty and manufacturing cost. Summary of the invention

[0003] The present invention provides a sealing structure and a compressor and an air conditioner having the sealing structure. By designing the deformation amount on the sealing member, the contact area between the sealing member and the sealed surface can be increased when the sealing member acts on the sealed surface, thereby improving the sealing effect. The deformation amount also expands the applicable pressure range of the sealing structure, thereby achieving good sealing between components.

[0004] In order to solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides a sealing structure, including a first joint surface, a second joint surface, and a sealing member, the first joint surface and the second joint surface are both provided with grooves, and the groove of the first joint surface and the groove of the second joint surface are arranged opposite to each other, the sealing member can be deformably installed in the groove, and the height of the sealing member is greater than the total depth of the grooves after joining.

[0005] In some embodiments, after the first engaging surface is engaged with the second engaging surface, the groove of the first engaging surface is aligned with the groove of the second engaging surface.

[0006] In some embodiments, the sealing member is provided with a first notch on the contact surface with the bottom wall of the groove, and the sealing member is provided with a second notch on the contact surface with the side wall of the groove.

[0007] In some embodiments, the first notch and the second notch are wide in shape.

[0008] In some embodiments, the angle ΦA between the side of the first notch and its centerline is greater than the angle ΦB between the side of the second notch and its centerline.

[0009] In some embodiments, ΦA and ΦB satisfy the relationship: ΦA=3ΦB.

[0010] In some embodiments, the width of the seal is less than the width of the groove.

[0011] In some embodiments, the bottom wall of the groove and the contact surface with the seal are configured as inclined surfaces, and the seal is provided with a third notch on the contact surface with the side wall of the groove, and the third notch is in an outwardly wide shape.

[0012] In some embodiments, the sealing member is provided with ribs on the contact surface with the side wall of the groove.

[0013] In some embodiments, the roughness of the first joint surface and the second joint surface is Ra0.8, and the flatness is 0.005 um.

[0014] According to another aspect of the present application, an embodiment of the present invention provides a compressor, which includes the above-mentioned sealing structure.

[0015] According to another aspect of the present application, an embodiment of the present invention provides an air conditioner, which includes the above-mentioned compressor.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention designs a deformation amount on the seal so that the seal deforms accordingly when subjected to external force, thereby increasing the contact area between the seal and the sealed surface and enhancing the sealing effect. Designing different degrees of deformation on the seal can meet the sealing requirements under different working pressures and expand the applicable pressure range of the sealing structure. At the same time, a larger deformation amount can effectively avoid the influence of the compression rate change caused by the cumulative tolerance of parts processing.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural cross-sectional view of a compressor according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A partial enlarged view of the middle A area;

[0021] Figure 3 yes Figure 2 A schematic cross-sectional view of a sealing member of the sealing structure shown;

[0022] Figure 4 yes Figure 2 A schematic diagram of a first joint surface of the sealing structure shown;

[0023] Figure 5 yes Figure 2 A schematic diagram of a second joint surface of the sealing structure shown;

[0024] Figure 6 yes Figure 2 An overall schematic diagram of a sealing member of the sealing structure shown;

[0025] Figure 7 is a structural sectional view of a compressor according to another embodiment of the present invention;

[0026] Figure 8 yes Figure 7 A partial enlarged view of the B area;

[0027] Fig. 9 yes Figure 8 A schematic cross-sectional view of a sealing member of the sealing structure shown;

[0028] Fig.10 yes Figure 8 A schematic diagram of a first joint surface of the sealing structure shown;

[0029] Fig.11 yes Figure 8 A schematic diagram of a second joint surface of the sealing structure shown;

[0030] Fig.12 yes Figure 8 An overall schematic diagram of the sealing member of the sealing structure shown.

[0031] in:

[0032] 1. First joint surface; 2. Second joint surface; 3. Sealing member; 31. First notch; 32. Second notch; 33. Third notch; 34. Raised rib; 35. Sealing member bottom surface; 36. Sealing member side surface; 4. Groove; 41. Groove bottom wall; 42. Groove side wall; 5. Front cover; 6. Housing; 7. Cylinder. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0034] In the description of the present invention, it should be clarified that terms such as "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", and "horizontal" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing the present invention. They do not mean that the devices or elements referred to must have a specific direction or position, and therefore cannot be understood as limitations on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figure 1 As shown, this embodiment provides a compressor, including a front cover 5, a shell 6, and a cylinder 7. The front cover 5 is fastened and fixed to the shell 6 by screws after being joined, and an internal space of the compressor is formed therein, and the internal space includes the cylinder 7. When the compressor is running, the working medium in the cylinder 7 generates pressure, and the sealing structure shown in the A part of the figure can prevent the working medium from leaking outward through the gap between the joint surfaces, thereby playing a sealing role.

[0037] like Figures 2 to 12As shown, this embodiment provides a sealing structure, including a first joint surface 1, a second joint surface 2, and a sealing member 3. The first joint surface 1 and the second joint surface 2 are both provided with a groove 4, and the groove openings of the two grooves 4 are arranged opposite to each other. After the first joint surface 1 is joined with the second joint surface 2, the two grooves 4 are joined to form a space for accommodating the sealing member 3, and the sealing member 3 is deformably installed in this accommodating space. Optionally, the groove openings of the two grooves 4 have equal widths. After the first joint surface 1 is joined with the second joint surface 2, the two groove openings are aligned to form a flat joint surface. When the roughness of the joint surface is Ra0.8 and the flatness is 0.005um, the two joint surfaces will be joined more tightly, which is more conducive to the sealing member 3 to seal the two joint surfaces. The height of the sealing member 3 is h1, the depth of the groove 4 of the first joint surface 1 is h21, and the depth of the groove 4 of the second joint surface 2 is h22. The sum of h21 and h22 is the total depth h2 of the groove 4 after joining. The height h1 of the seal 3 is greater than the total depth h2 of the two grooves 4 after they are joined. When the first joining surface 1 and the second joining surface 2 are pressed and joined by the locking force, the bottom surface 35 of the seal can fully contact the bottom wall 41 of the groove. Under the action of the locking force, the seal 3 is squeezed and deformed. After the deformation, the contact area between the seal 3 and the two joining surfaces increases, and the groove 4 can be filled more saturatedly, effectively sealing the gap formed between the two joining surfaces, preventing the working medium in the sealed space from flowing out through the gap, and achieving a good sealing effect between the components.

[0038] As a specific implementation method, Figures 2 to 5 As shown, the bottom surface 35 of the sealing member is provided with a first notch 31, and the side surface 36 of the sealing member is provided with a second notch 32. Optionally, as Figure 3 As shown, the first notch 31 and the second notch 32 are both set to be wide-outward. When the seal 3 is subjected to a force from the vertical direction, the entity parts on both sides of the first notch 31 are deformed, widening to the outside of the notch or moving closer to the inside of the notch, and at this time, the entity parts on both sides of the second notch 32 are deformed in the opposite way, moving closer to the inside of the notch or widening to the outside of the notch; when the seal 3 is subjected to a force from the horizontal direction, the entity parts on both sides of the first notch 31 are deformed, widening to the outside of the notch or moving closer to the inside of the notch, and at this time, the entity parts on both sides of the second notch 32 are deformed in the opposite way, moving closer to the inside of the notch or widening to the outside of the notch. When a notch with a wide-outward shape is subjected to a force, it is easier for the entity parts on both sides of the notch to be deformed to widen to the outside of the notch, and this deformation is conducive to increasing the direct contact area between the seal 3 and the sealed surface, thereby improving the sealing effect.

[0039] As a specific implementation, the angle ΦA between the side of the first notch 31 and its centerline is greater than the angle ΦB between the side of the second notch 32 and its centerline. The angle between the side of the notch and its centerline determines the opening degree of the notch. The larger the angle, the greater the opening degree of the notch, and the smaller the angle, the smaller the opening degree of the notch. Figures 2 to 5 As shown, when the first joint surface 1 and the second joint surface 2 are joined, they are pressed and fitted by the locking force perpendicular to the joint surface. The bottom surface 35 of the seal is fully in contact with the two groove bottom walls 41 and slightly deformed. As the locking force increases, the force on the seal 3 in the vertical direction will also increase, and the seal 3 will deform to a greater extent. The first notch 31 opens outward, and the second notch 32 closes inward. The contact area between the seal 3 and the inner surface of the groove 4 increases, and a better sealing effect is achieved. When the medium pressure in the sealed space increases, the pressure will be transmitted outward through the gap of the sealed joint surface. The seal 3 will be squeezed and deformed in the direction away from the gap under the action of the pressure. The first notch 31 closes inward, and the second notch 32 opens outward. After the second notch 32 opens, the contact area between the seal 3 and the groove side wall 42 increases, and the sealing effect is enhanced. When ΦA is set to be greater than ΦB, the seal 3 can be deformed by different amounts in the vertical and horizontal directions. Optionally, ΦA=3ΦB. This arrangement makes it easier for the second notch 32 to extend outward when it is wide open, and the deformation range is larger. When the pressure of the medium inside the sealed surface changes within a certain range, the seal 3 can provide a corresponding deformation to meet the sealing of different pressures. At the same time, this arrangement also increases the flexibility of the seal structure, and can avoid the influence of the compression rate caused by the size caused by the cumulative tolerance of the parts processing. Generally speaking, the sealing effect of the seal is better when the deformation of the seal is between 20% and 30%.

[0040] As a specific implementation method, Figure 2 As shown, the width d1 of the seal 3 is smaller than the width d2 of the groove 4. During industrial assembly, in order to more conveniently install the seal 3 in the groove 4, the width d1 of the seal 3 can be designed to be smaller than the width d2 of the groove 4. On the other hand, in order not to affect the sealing effect of the seal 3 and to avoid the seal 3 failing to achieve full contact with the inner surface of the groove 4 when the seal 3 is deformed to the maximum extent, the width d1 of the seal 3 can be slightly smaller than the width d2 of the groove 4. Optionally, d1 and d2 satisfy the relationship: 0.1mm≤d2-d1≤0.15mm. When the relationship is satisfied, the seal 3 can be easily installed in the groove 4 while ensuring that its sealing effect is not affected.

[0041] As a specific implementation method, Figures 7 to 11 As shown, a sealing bottom surface 35 of the sealing member 3 and the corresponding contacting groove bottom wall 41 are both set as inclined surfaces; the sealing member 3 is provided with a third notch 33 on the contact surface with the side surface of the groove 4, as shown in FIG. Fig. 9 As shown, the third notch 33 is an outer wide shape. The height h1 of the seal 3 is greater than the total depth h2 of the two grooves 4 after engagement, and the seal 3 is deformably installed in the groove 4. After the first engagement surface 1 and the second engagement surface 2 are engaged and locked, the force of the locking force on the inclined surface is perpendicular to the inclined surface, and the force will generate a horizontal component force acting on the body of the seal 3. The seal 3 is squeezed and deformed by the force, and the horizontal component force will cause the seal 3 as a whole to have a tendency to move in the horizontal direction. This tendency prompts the third notch 33 to fully contact with the corresponding groove side wall 42, thereby expanding the contact area between the seal 3 and the sealed surface. The third notch 33 is set to be an outer wide shape, and optionally, the third notch 33 can be set to be an arc shape. When the seal 3 is subjected to the horizontal force, the inner surface of the third notch 33 expands outward from the notch and fully fits with the groove side wall 42. The contact area is significantly increased compared to before deformation. When the third notch 33 is an arc surface, a better sealing effect can be achieved. Optionally, the seal 3 is set to have an angle ΦC between the contact surface of the inclined surface and the center line of the third notch 33, and 0°≤ΦC≤10°. The angle ΦC determines the opening and closing degree of the third notch 33. The larger the angle ΦC, the greater the opening and closing degree, and vice versa. If the opening and closing degree is too large, the designed deformation amount is small, and if the opening and closing degree is too small, the inner surface of the third notch 33 cannot be fully contacted with the side wall 42 of the groove. Setting an appropriate opening and closing degree can ensure that the inner surface of the third notch can be fully contacted with the side wall of the groove after being deformed by force, thereby achieving effective sealing of the sealed surface.

[0042] As a specific implementation method, Figures 8 to 12 As shown, a convex rib 34 is provided on the side 36 of the seal. When the seal 3 is squeezed and deformed by force, the convex rib 34 fully contacts the groove side wall 42 and produces a supporting effect. The groove side wall 42 exerts a force on the seal 3 through the convex rib 34 to cause the third notch 33 to fully deform and fit closely to the corresponding groove side wall 42, thereby achieving a better sealing effect. Optionally, the arrangement of the convex rib 34 corresponds to the position of the third notch, and the number and size of the convex rib 34 are not limited. Optionally, the width of the seal bottom surface 35 of the seal 3 is d3, the width between the outermost edge of the third notch 33 of the seal 3 and the outermost edge of the convex rib 34 is d4, and the width of the groove 4 is d2, satisfying the relationship: 0.9d2≤d3≤0.95d2, 1.05d2≤d4≤1.1d2, which can ensure that when the seal 3 is squeezed and stressed, each point on the surface of the seal 3 can fully contact each inner surface of the groove 4, thereby achieving a good sealing effect.

[0043] As a specific implementation method, Figures 1 to 12As shown, the height h1 of the seal 3 and the total depth h2 of the first joint surface 1 and the two grooves 4 of the second joint surface 2 after joining, satisfy the relationship: 1.25

[0044] Furthermore, the roughness of the first joint surface 1 and the second joint surface 2 is Ra0.8, and the flatness is 0.005um. The first joint surface 1 and the second joint surface 2 meet certain roughness and flatness, which can ensure a closer contact when the two are joined, and help seal the contact surface.

[0045] The present application also provides a compressor, comprising the above-mentioned sealing structure.

[0046] like Figure 1 or Figure 7 As shown, when any of the above-mentioned sealing structures is applied to the sealing between the front cover 5 and the shell 6 of the segmented compressor, the locking force perpendicular to the joint surface for locking the front cover 5 and the shell 6 is fixed, and the deformation of the seal 3 in this direction does not change substantially after locking; the working pressure from the cylinder 7 in the joint surface horizontal to the joint surface will change with the operation of the compressor, and seals with notches of different deformation amounts can meet the sealing requirements of the joint surfaces at different operating pressures, and the applicable pressure range of the sealing structure can be expanded to 5-15Mpa.

[0047] like Figure 6 or Fig.12 The overall shape of the seal 3 can be set to the shape shown in the figure. When any of the above sealing structures is applied to the compressor, the overall shape of the seal 3 can be designed to any shape as needed.

[0048] The present application also provides an air conditioner, comprising the above-mentioned compressor.

[0049] ​The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention still falls within the scope of the technical solution of the present invention. It is easy for those skilled in the art to understand that the above advantageous technical features can be freely combined and superimposed without conflict.

Claims

1. A compressor, characterized in that: The invention comprises a front cover (5), a shell (6) and a sealing structure, wherein the sealing structure comprises a first joint surface (1), a second joint surface (2) and a sealing member (3), wherein the first joint surface (1) and the second joint surface (2) are both provided with a groove (4), and the groove (4) of the first joint surface (1) and the groove (4) of the second joint surface (2) are arranged opposite to each other, the sealing member (3) is deformably mounted in the groove (4), and the height of the sealing member (3) is greater than the total depth of the groove (4) after being joined; After the first joint surface (1) and the second joint surface (2) are joined, the groove (4) of the first joint surface (1) is aligned with the groove (4) of the second joint surface (2), the sealing member (3) is provided with a first notch (31) on the contact surface with the bottom wall of the groove (4), and the sealing member (3) is provided with a second notch (32) on the contact surface with the side wall of the groove (4); The bottom wall of the front cover (5) is the first joint surface (1), the top wall of the shell (6) is the second joint surface (2), a cylinder (7) is arranged in the shell (6), the first notch (31) is deformed to withstand a locking force in a vertical direction, the second notch (32) is deformed to withstand a pressure generated by a working medium in the cylinder (7) in a horizontal direction, and the sealing member (3) is deformed in different amounts in the vertical direction and the horizontal direction.

2. The compressor according to claim 1, characterized in that The first notch (31) and the second notch (32) are of an outwardly wide shape.

3. The compressor according to claim 2, characterized in that The included angle ΦA between the side of the first notch (31) and its centerline is greater than the included angle ΦB between the side of the second notch (32) and its centerline.

4. The compressor according to claim 3, characterized in that The ΦA and the ΦB satisfy the relationship: ΦA=3ΦB.

5. The compressor according to claim 3, characterized in that The width of the sealing element (3) is smaller than the width of the groove (4).

6. The compressor according to any one of claims 1 to 5, characterized in that: The roughness of the first joint surface (1) and the second joint surface (2) is Ra0.8, and the flatness is 0.005 um.

7. An air conditioner, characterized in that: The air conditioner includes the compressor according to claim 1.

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