Multi-layer composite sealing gasket for automobile air conditioner

Abstract

The utility model belongs to the technical field of sealing of automobile air conditioners, and discloses a multilayer composite sealing gasket for an automobile air conditioner, which comprises a sealing gasket body, the sealing gasket body comprises a first EPDM layer, a second EPDM layer and a third EPDM layer, the first EPDM layer is sleeved on the outer wall of the second EPDM layer, the second EPDM layer is sleeved on the outer wall of the third EPDM layer, the third EPDM layer is internally provided with a hole for a high-pressure rubber hose joint to pass through, and the hole is communicated with the hole. A plurality of supporting columns are clamped between the first EPDM layer and the second EPDM layer and between the second EPDM layer and the third EPDM layer. According to the sealing gasket, the sealing gasket body is divided into a plurality of independent sleeve layers, under the condition that one sleeve layer deforms, the influence on other sleeve layers is reduced, and the sealing gasket body can be prevented from being extruded and deformed through the clamping effect of the supporting columns.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for automotive air conditioning, specifically to a multi-layer composite sealing gasket for automotive air conditioning. Background Technology

[0002] Sealing technology is one of the key technologies in automotive air conditioning. It ensures the normal operation and cooling effect of the automotive air conditioning system. Modern automotive air conditioning systems typically use automotive air conditioning gaskets. Their main function is to ensure the seal between various components of the system, prevent refrigerant leakage, and thus ensure the normal operation and cooling effect of the air conditioning system.

[0003] Ethylene propylene diene monomer (EPDM) rubber gaskets are widely used due to their excellent heat resistance, ozone resistance, and aging resistance. When using them, first place the EPDM gasket on the high-pressure hose connector, and then tighten the nut to secure it. High-pressure hoses equipped with EPDM gaskets can be used for connections between components such as compressors and condensers, condensers and evaporators, and evaporators and expansion valves to prevent refrigerant leakage.

[0004] In existing technology, EPDM gaskets are placed directly on high-pressure hose connectors during use. If the EPDM gasket is subjected to excessive pressure or torque during use, it will deform, thereby affecting the sealing effect of the EPDM gasket. Utility Model Content

[0005] Therefore, this utility model provides a multi-layer composite sealing gasket for automotive air conditioning to solve the technical problem that existing EPDM sealing gaskets deform when subjected to excessive compression or torque, thus affecting the sealing effect of the EPDM sealing gasket.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0007] A multi-layer composite gasket for automotive air conditioning, comprising a gasket body;

[0008] The sealing gasket body includes a first EPDM layer, a second EPDM layer, and a third EPDM layer. The first EPDM layer is sleeved on the outer wall of the second EPDM layer, and the second EPDM layer is sleeved on the outer wall of the third EPDM layer. The third EPDM layer has a hole for a high-pressure hose connector to pass through.

[0009] Several support columns are snapped between the first EPDM layer and the second EPDM layer, and between the second EPDM layer and the third EPDM layer, so as to generate a force that prevents the torsional deformation of the sheath when one of the first EPDM layer, the second EPDM layer, or the third EPDM layer is subjected to torsion.

[0010] The support column is arranged along a direction perpendicular to the first EPDM layer, the second EPDM layer, and the third EPDM layer to generate a reverse support force when the sealing gasket body is compressed.

[0011] Further,

[0012] The top and bottom surfaces of the first EPDM layer, the second EPDM layer, and the third EPDM layer are flush.

[0013] Further,

[0014] Both ends of the support column are far away from the upper and lower surfaces of the first EPDM layer, the second EPDM layer, and the third EPDM layer.

[0015] Further,

[0016] The support column is arranged along the radial direction of the inner hole of the third EPDM layer.

[0017] Further,

[0018] Both the second EPDM layer and the third EPDM layer are ring-shaped;

[0019] The seams between the first EPDM layer and the second EPDM layer, and between the second EPDM layer and the third EPDM layer, are fitted together.

[0020] Further,

[0021] The first EPDM layer and the second EPDM layer, and the second EPDM layer and the third EPDM layer, are connected at positions away from the support column by a snap-fit ​​structure.

[0022] Further,

[0023] The snap-fit ​​structure includes a sealing strip and a sealing groove disposed between the first EPDM layer and the second EPDM layer, and between the second EPDM layer and the third EPDM layer;

[0024] The sealing strip is connected to the inner wall of the second EPDM layer and the inner wall of the first EPDM layer, and the sealing groove is provided on the outer wall of the third EPDM layer and the outer wall of the second EPDM layer. The sealing strip cooperates with the sealing groove.

[0025] Compared with the prior art, this utility model has the following advantages:

[0026] In this invention, the sealing gasket body is divided into multiple independent sleeves along its own gasket surface direction. When one sleeve is deformed by torsion, the force on other sleeves is greatly reduced, thereby improving the deformation resistance of each independent part of the sealing gasket body under torsion.

[0027] Furthermore, the snap-fit ​​action of the support columns prevents the sleeve from deforming under torque. In addition, the support column action in the vertical direction can prevent the gasket body from being squeezed and deformed, thereby improving the overall deformation resistance of the gasket body under torque and increasing its compressive strength. Attached Figure Description

[0028] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic cross-sectional view of the sealing gasket body in an embodiment of the present utility model.

[0030] Figure 2 A schematic diagram of the overall structure of a multi-layer composite sealing gasket for automotive air conditioning provided for an embodiment of this utility model;

[0031] Figure 3 This is a schematic cross-sectional view of the first EPDM layer, the second EPDM layer, and the third EPDM layer away from the support column in an embodiment of this utility model.

[0032] Figure 4 This is a top view of a multi-layer composite sealing gasket for automotive air conditioning, provided as an embodiment of the present invention.

[0033] The labels in the diagram represent the following:

[0034] 1-Sealing gasket body; 2-First EPDM layer; 3-Second EPDM layer; 4-Third EPDM layer; 5-Support column; 6-Anti-slip texture; 7-Sealing strip; 8-Sealing groove. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figure 1 and Figure 2 As shown, this utility model provides a multi-layer composite sealing gasket for automotive air conditioning, including a sealing gasket body 1;

[0037] The sealing gasket body 1 includes a first EPDM layer 2, a second EPDM layer 3, and a third EPDM layer 4. The first EPDM layer 2 is fitted onto the outer wall of the second EPDM layer 3, the second EPDM layer 3 is fitted onto the outer wall of the third EPDM layer 4, and the third EPDM layer 4 has a hole for the high-pressure hose connector to pass through.

[0038] Several support columns 5 are snapped between the first EPDM layer 2 and the second EPDM layer 3, and between the second EPDM layer 3 and the third EPDM layer 4, so as to generate a force to prevent the torsional deformation of the layer when one of the first EPDM layer 2, the second EPDM layer 3, and the third EPDM layer 4 is subjected to torsion.

[0039] The support column 5 is arranged along a direction perpendicular to the first EPDM layer 2, the second EPDM layer 3, and the third EPDM layer 4, so as to generate a reverse support force when the sealing gasket body 1 is compressed.

[0040] In this invention, the sealing gasket body 1 is divided into multiple independent sleeves along its own gasket surface direction. When one sleeve is deformed by torsion, the force on other sleeves is greatly reduced, thereby improving the deformation resistance of each independent part of the sealing gasket body 1 under torsion.

[0041] Furthermore, the snap-fit ​​action of the support column 5 prevents the sleeve from deforming under torque. In addition, the support action of the support column 5 in the vertical direction can prevent the sealing gasket body 1 from being squeezed and deformed, thereby improving the overall deformation resistance of the sealing gasket body 1 under torque and increasing its compressive strength.

[0042] In order to ensure that the sealing gasket body 1 is stably fixed in the installation position, the upper and lower surfaces of the first EPDM layer 2, the second EPDM layer 3, and the third EPDM layer 4 are flush.

[0043] like Figure 1 and Figure 4As shown, the support column 5 is a rigid structure. If it is directly inserted into the EPDM layer of the sealing gasket body 1, it may block the upper and lower installed structures, preventing the sealing gasket body 1 from directly contacting the upper and lower installed structures, thus failing to achieve a sealing effect. Therefore, the support column 5 in this utility model adopts the following installation method: both ends of the support column 5 are far away from the upper and lower surfaces of the first EPDM layer 2, the second EPDM layer 3, and the third EPDM layer 4.

[0044] Among them, the support columns 5 are all set along the radial direction of the first EPDM layer 2, the second EPDM layer 3, and the third EPDM layer 4, so as to achieve a better support effect.

[0045] In actual use, the shape of the gasket varies depending on the environment in which it is used. In order to match various installation structures, the second EPDM layer 3 and the third EPDM layer 4 are both annular, while the first EPDM layer 2 can be designed to match the shape of the installation structure, so that the gasket body 1 is tightly connected to the installation structure, thereby achieving a better sealing effect. The joints between the first EPDM layer 2 and the second EPDM layer 3, and between the second EPDM layer 3 and the third EPDM layer 4 are mutually compatible.

[0046] like Figure 3 As shown, since each EPDM layer is a whole, if only a nested connection method is used, the sealing gasket body 1 will not be firm as a whole. In order to make the connection of each EPDM layer tighter, the first EPDM layer 2 and the second EPDM layer 3, and the second EPDM layer 3 and the third EPDM layer 4 are connected by a snap-fit ​​structure at the position away from the support column 5. Specifically, the snap-fit ​​structure includes a sealing strip 7 and a sealing groove 8 set between the first EPDM layer 2 and the second EPDM layer 3, and between the second EPDM layer 3 and the third EPDM layer 4. The sealing strip 7 is connected to the inner wall of the first EPDM layer 2 and the inner wall of the second EPDM layer 3, and the sealing groove 8 is set on the outer wall of the second EPDM layer 3 and the outer wall of the third EPDM layer 4. The sealing strip 7 and the sealing groove 8 are engaged.

[0047] The sealing strip 7 on the inner wall of the first EPDM layer 2 is engaged with the sealing groove 8 on the outer wall of the second EPDM layer 3, and the sealing strip 7 on the inner wall of the second EPDM layer 3 is engaged with the sealing groove 8 on the outer wall of the third EPDM layer 4, thereby making the sealing gasket body 1 more tightly arranged.

[0048] If the contact surface between the sealing gasket body 1 and the mounting structure (such as a high-pressure hose connector) is relatively smooth, it is easy to deform under large pressure. In order to increase the friction between the sealing gasket body 1 and the mounting structure (such as a high-pressure hose connector), anti-slip texture 6 is provided on the inner wall of the sealing gasket body 1.

[0049] It should be noted that the EPDM layer in the sealing gasket body 1 is not limited to the first EPDM layer 2, the second EPDM layer 3, and the third EPDM layer 4, but can be added or removed according to the specific application.

[0050] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A multi-layer composite sealing gasket for automotive air conditioning, characterized in that, Includes the sealing gasket body (1); The sealing gasket body (1) includes a first EPDM layer (2), a second EPDM layer (3), and a third EPDM layer (4). The first EPDM layer (2) is sleeved on the outer wall of the second EPDM layer (3), and the second EPDM layer (3) is sleeved on the outer wall of the third EPDM layer (4). The third EPDM layer (4) has a hole for the high-pressure hose connector to pass through. Several support columns (5) are snapped between the first EPDM layer (2) and the second EPDM layer (3), and between the second EPDM layer (3) and the third EPDM layer (4), so as to generate a force that prevents the torsional deformation of the layer when one of the first EPDM layer (2), the second EPDM layer (3), and the third EPDM layer (4) is subjected to torsion. The support column (5) is arranged in a direction perpendicular to the first EPDM layer (2), the second EPDM layer (3), and the third EPDM layer (4) to generate a reverse support force when the sealing gasket body (1) is compressed.

2. The multi-layer composite sealing gasket for automotive air conditioning according to claim 1, characterized in that, The top and bottom surfaces of the first EPDM layer (2), the second EPDM layer (3), and the third EPDM layer (4) are flush.

3. A multi-layer composite sealing gasket for automotive air conditioning according to claim 2, characterized in that, Both ends of the support column (5) are far away from the upper and lower surfaces of the first EPDM layer (2), the second EPDM layer (3), and the third EPDM layer (4).

4. A multi-layer composite sealing gasket for automotive air conditioning according to claim 1, characterized in that, The support column (5) is arranged along the radial direction of the inner hole of the third EPDM layer (4).

5. A multi-layer composite sealing gasket for automotive air conditioning according to claim 4, characterized in that, Both the second EPDM layer (3) and the third EPDM layer (4) are annular; The seams between the first EPDM layer (2) and the second EPDM layer (3), and between the second EPDM layer (3) and the third EPDM layer (4), are mutually fitted.

6. A multi-layer composite sealing gasket for automotive air conditioning according to claim 1, characterized in that, The first EPDM layer (2) and the second EPDM layer (3), and the second EPDM layer (3) and the third EPDM layer (4) are connected at positions away from the support column (5) by a snap-fit ​​structure.

7. A multi-layer composite sealing gasket for automotive air conditioning according to claim 6, characterized in that, The snap-fit ​​structure includes a sealing strip (7) and a sealing groove (8) disposed between the first EPDM layer (2) and the second EPDM layer (3), and between the second EPDM layer (3) and the third EPDM layer (4); The sealing strip (7) is connected to the inner wall of the second EPDM layer (3) and the inner wall of the first EPDM layer (2). The sealing groove (8) is provided on the outer wall of the third EPDM layer (4) and the outer wall of the second EPDM layer (3). The sealing strip (7) cooperates with the sealing groove (8).

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