Air conditioner expansion valve sealing device and vehicle

Abstract

The application relates to the technical field of automobile parts, and provides an air conditioner expansion valve sealing device and a vehicle, which comprises an expansion valve, a front wall sheet metal and a sealing gasket, the sealing gasket is used for sleeving an air conditioner pipe of the vehicle, the expansion valve and the sealing gasket are respectively located on the two sides of the front wall sheet metal and are respectively used for being in sealing connection with the air conditioner pipe, and the sealing gasket is in sealing connection with the front wall sheet metal. In this way, the front wall sheet metal is used for respectively separating the expansion valve and the sealing gasket in an engine compartment and an in-vehicle space, so that the sealing gasket can be assembled in the vehicle together with an air conditioner assembly, assembly is simple, the sealing effect is good, and pipeline connection between the expansion valve and the air conditioner pipe and between the expansion valve and components such as an air conditioner compressor in the engine compartment is facilitated, so that the risk of motor noise in the engine compartment and residual water along the air conditioner pipe to the in-vehicle penetration is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and more specifically, to an air conditioning expansion valve sealing device and a vehicle. Background Technology

[0002] With the rapid development of the automotive industry and the increasing popularity of vehicles, people have higher and higher requirements for the NVH (Noise, Vibration, Harshness) performance and waterproofing of the entire vehicle. Among them, "high motor noise" and "water leakage inside the vehicle" have become important factors affecting the comfort of customers, and the sound insulation and sealing of the entire vehicle's perforations are one of the key indicators of the NVH performance of the entire vehicle.

[0003] Currently, automotive air conditioning systems typically employ a gasket fitted over an expansion valve, using the fit between the gasket and the expansion valve, as well as between the gasket and the high and low pressure air conditioning pipes, for sealing. However, due to the irregular and complex shape of the expansion valve, the sealing surface of the gasket in contact with the expansion valve is also complex and irregular. During assembly, the gasket is easily deformed by compression, leading to poor sealing between the gasket and the expansion valve, and between the gasket and the high and low pressure air conditioning pipes. When the expansion valve is poorly sealed, residual water in the engine compartment and high-frequency noise from the motor can easily seep into the vehicle through gaps created by deformation between the gasket and the expansion valve, and between the gasket and the high and low pressure air conditioning pipes. This makes the noise from the motor noticeably louder for passengers, and the water seepage into the vehicle can also easily cause mold growth. Summary of the Invention

[0004] The problem this invention addresses is how to reduce motor noise in the engine compartment of a vehicle and the risk of residual water seeping into the vehicle through the air conditioning pipes.

[0005] To solve the above problems, the present invention provides an air conditioning expansion valve sealing device, including an expansion valve, a front bulkhead sheet metal and a sealing gasket. The sealing gasket is used to be sleeved on the air conditioning pipe of the vehicle. The expansion valve and the sealing gasket are respectively located on both sides of the front bulkhead sheet metal and are respectively used to seal and connect with the air conditioning pipe. The sealing gasket is also sealed and connected with the front bulkhead sheet metal.

[0006] Optionally, the sealing gasket includes a sealing body and a first sealing part. A first opening is provided on the front sheet metal at a position corresponding to the sealing gasket. The first sealing part is connected to the side of the sealing body facing the front sheet metal and is interference-fitted with the first opening.

[0007] Optionally, the first sealing part is a first sealing boss, which is provided to protrude toward the front sheet metal along the thickness direction of the sealing gasket.

[0008] Optionally, the sealing gasket further includes a second sealing portion connected to the sealing body, the second sealing portion being disposed around the first sealing portion and having a gap between them, and the second sealing portion abutting against the side of the front sheet metal opposite to the expansion valve.

[0009] Optionally, the second sealing part is provided with a first sealing surface, which is in contact with the side of the front sheet metal opposite to the expansion valve.

[0010] Optionally, the air conditioning expansion valve sealing device further includes a clamping member, which is used to clamp onto the air conditioning pipe and is located between the sealing gasket and the expansion valve, and the sealing gasket abuts against the clamping member.

[0011] Optionally, the air conditioning expansion valve sealing device further includes a sound insulation pad with a second opening, the sound insulation pad being connected to the side of the front sheet metal away from the expansion valve, and the second sealing part being interference-fitted with the second opening.

[0012] Optionally, the sealing gasket further includes a third sealing portion, which is disposed around the edge of the second sealing portion away from the first sealing portion and abuts against the side of the sound insulation pad away from the front sheet metal.

[0013] Optionally, the third sealing part is provided with a second sealing surface, which is in contact with the side of the sound insulation pad that is away from the front sheet metal.

[0014] To address the aforementioned problems, the present invention also provides a vehicle including the air conditioning expansion valve sealing device described above.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention achieves a sealed connection between the expansion valve and the air conditioning pipe, as well as between the gasket and the air conditioning pipe, by means of, for example, interference fit, to prevent gaps from forming between the gasket and the expansion valve, and between the gasket and the air conditioning pipe. This reduces the risk of motor noise in the engine compartment and residual water seeping into the vehicle through the air conditioning pipe. Furthermore, by placing the expansion valve on the side of the front bulkhead facing, for example, the engine compartment, and the sealing gasket on the side of the front bulkhead away from the engine compartment, and sealing the gasket to the front bulkhead, the expansion valve and the sealing gasket can be separated in the engine compartment and the interior space, respectively, using the front bulkhead to separate them. This not only blocks residual water and high-frequency noise from the motor in the engine compartment, thus reducing interior noise and water seepage and improving passenger comfort, but also allows the sealing gasket to be installed inside the vehicle along with the air conditioning assembly. Compared to the existing technology of mounting the sealing gasket on the expansion valve, this method is simpler to assemble and provides a better seal. At the same time, it facilitates the connection of pipelines between the expansion valve and the air conditioning pipes, as well as between the expansion valve and the air conditioning compressor, in the engine compartment. This shifts the leakage point of the air conditioning pipeline from the expansion valve to the engine compartment, preventing water from seeping into the vehicle when there is a leak at the expansion valve, further reducing the risk of motor noise and residual water seeping into the vehicle from the engine compartment along the air conditioning pipes. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of the air conditioning expansion valve sealing device in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the air conditioning expansion valve sealing device in an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of the air conditioning expansion valve sealing device in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the sealing gasket structure in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the sealing gasket from another perspective in an embodiment of the present invention;

[0022] Figure 6 This is a cross-sectional schematic diagram of the sealing gasket in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the sealing gasket and clamping component assembled on the air conditioning pipe and air conditioning unit in an embodiment of the present invention;

[0024] Figure 8 This is a cross-sectional view of the sealing gasket and clamping component assembled on the air conditioning pipe and air conditioning unit in an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Expansion valve; 2. Front sheet metal; 21. First opening; 3. Sealing gasket; 31. Sealing body; 32. First sealing part; 33. Second sealing part; 331. First sealing surface; 34. Third sealing part; 341. Second sealing surface; 35. First through hole; 36. Second through hole; 4. Clamping component; 5. Sound insulation pad; 51. Second opening;

[0027] 100. Air conditioning pipe; 110. High-pressure water pipe; 120. Low-pressure water pipe; 200. Evaporator; 300. Air conditioning unit. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] In the attached figures, the Z-axis represents the vertical direction, i.e., the up-down position, with the positive direction of the Z-axis (i.e., the direction the arrow points) representing upwards and the negative direction representing downwards. The X-axis represents the horizontal direction and is designated as the front-back position, with the positive direction of the X-axis representing the front side and the negative direction representing the back side. The Y-axis represents the left-right position, with the positive direction of the Y-axis representing the left side and the negative direction representing the right side. It should be noted that the aforementioned representations of the Z-axis, Y-axis, and X-axis are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0031] Combination Figures 1 to 3 As shown, this embodiment of the invention provides an air conditioning expansion valve sealing device, including an expansion valve 1, a front sheet metal 2, and a sealing gasket 3. The sealing gasket 3 is used to be sleeved on the air conditioning pipe 100 of the vehicle. The expansion valve 1 and the sealing gasket 3 are located on both sides of the front sheet metal 2 and are used to seal and connect with the air conditioning pipe 100 respectively. The sealing gasket 3 is also sealed and connected with the front sheet metal 2.

[0032] Specifically, the expansion valve 1 is typically located on the side of the front bulkhead 2 facing the engine compartment, while the sealing gasket 3 is located on the side of the front bulkhead 2 away from the engine compartment. It should be noted that the side of the front bulkhead 2 facing the engine compartment is the side where the front bulkhead 2 is located... Figure 1The side facing the positive X-axis is also the front side of the front bulkhead 2. Correspondingly, the side of the front bulkhead 2 that faces away from the engine compartment is where the front bulkhead 2 is located. Figure 1 The side opposite to the X-axis is also the rear side of the front bulkhead 2. That is, the front area of ​​the front bulkhead 2 is the engine compartment, and the rear area is the interior space. In other words, the expansion valve 1 and the sealing gasket 3 are typically located on the front and rear sides of the front bulkhead 2, respectively. One end of the air conditioning pipe 100 is connected to the evaporator 200 mounted inside the air conditioning housing 300, and the other end extends out of the air conditioning housing 300 and passes through the front bulkhead 2 to connect to the expansion valve 1. The sealing gasket 3 is fitted onto the end of the air conditioning pipe 100 near the expansion valve 1 and is sealed to the front bulkhead 2. The expansion valve 1 and the air conditioning pipe 100, as well as the sealing gasket 3 and the air conditioning pipe 100, are typically sealed using an interference fit.

[0033] In this embodiment, a sealed connection can be achieved between the expansion valve 1 and the air conditioning pipe 100, and between the sealing gasket 3 and the air conditioning pipe 100, for example, by using an interference fit. This prevents gaps from forming between the sealing gasket 3 and the expansion valve 1, and between the sealing gasket 3 and the air conditioning pipe 100, thereby reducing the risk of motor noise and residual water seeping into the vehicle interior along the air conditioning pipe 100. Furthermore, by placing the expansion valve 1 on the side of the front bulkhead 2 facing, for example, the engine compartment, and placing the sealing gasket 3 on the side of the front bulkhead 2 away from the engine compartment, and sealing the sealing gasket 3 with the front bulkhead 2, the front bulkhead 2 separates the expansion valve 1 and the sealing gasket 3 into the engine compartment and the vehicle interior space, respectively. This not only blocks residual water and high-frequency motor noise in the engine compartment through the sealed connection between the sealing gasket 3 and the front bulkhead 2, reducing interior noise and water seepage, but also improves the comfort of the driver and passengers. It also allows the sealing gasket 3 to be installed inside the vehicle along with the air conditioning assembly. Compared with the existing technology of installing the sealing gasket 3 on the expansion valve 1, the assembly is simple and the sealing effect is good. At the same time, it facilitates the connection of pipelines between the expansion valve 1 and the air conditioning pipe 100 and between the expansion valve 1 and the air conditioning compressor and other components in the engine compartment. This moves the leakage point of the air conditioning pipeline at the expansion valve 1 to the engine compartment, so as to avoid water seeping into the vehicle when there is a leak at the expansion valve 1. This further reduces the risk of motor noise in the engine compartment and residual water seeping into the vehicle along the air conditioning pipe 100.

[0034] Furthermore, combined Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, the sealing gasket 3 has a first through hole 35 and a second through hole 36 extending through the sealing gasket 3 along its thickness direction. The first through hole 35 and the second through hole 36 are spaced apart and are used for interference fit with the high-pressure water pipe 110 and the low-pressure water pipe 120 of the air conditioning pipe 100, respectively. The thickness direction of the sealing gasket 3 refers to the dimension of the sealing gasket 3 in the X-axis direction.

[0035] In this embodiment, the vehicle's air conditioning pipe 100 includes a high-pressure water pipe 110 and a low-pressure water pipe 120. One end of the high-pressure water pipe 110 and the low-pressure water pipe 120 are connected to the evaporator 200 assembled in the air conditioning housing 300, and the other end extends out of the air conditioning housing 300 and passes through the sealing gasket 3 and the front sheet metal 2 in sequence to connect to the expansion valve 1. That is, the sealing gasket 3 is sleeved on the end of the high-pressure water pipe 110 and the low-pressure water pipe 120 near the expansion valve 1. Specifically, the other end of the high-pressure water pipe 110 passes sequentially through the first through hole 35 on the sealing gasket 3 and the first opening 21 on the front sheet metal 2 (described later) to connect to the expansion valve 1. The other end of the low-pressure water pipe 120 passes sequentially through the second through hole 36 on the sealing gasket 3 and the first opening 21 on the front sheet metal 2 to connect to the expansion valve 1. The outer diameter of the high-pressure water pipe 110 is slightly larger than the diameter of the first through hole 35, and the outer diameter of the low-pressure water pipe 120 is slightly larger than the diameter of the second through hole 36. That is, the high-pressure water pipe 110 and the first through hole 35 are interference-fitted, and the low-pressure water pipe 120 and the second through hole 36 are interference-fitted. In this way, the sealing connection between the sealing gasket 3 and the air conditioning pipe 100 is achieved by using an interference fit, which not only has a good sealing effect, but also has a simple structure and is easy to assemble.

[0036] Optionally, combined Figure 1 , Figure 3 and Figure 4 As shown, the sealing gasket 3 includes a sealing body 31 and a first sealing part 32. A first opening 21 is provided on the front sheet metal 2 at a position corresponding to the sealing gasket 3. The sealing body 31 is located on the side of the front sheet metal 2 away from the expansion valve 1. The first sealing part 32 is connected to the side of the sealing body 31 facing the front sheet metal 2 and is interference-fitted with the first opening 21.

[0037] In this embodiment, the sealing gasket 3 is typically made of foamed materials such as ethylene propylene diene monomer (EPDM) or polyurethane (PUR) using an integral molding process, and has a certain degree of elasticity. The first opening 21 on the front sheet metal 2 is used for the air conditioning pipe 100 to pass through, and the air conditioning pipe 100 is sealed to the first opening 21 of the front sheet metal 2 through the sealing gasket 3. Specifically, by providing a first sealing part 32 on the side of the sealing body 31 facing the front sheet metal 2, and making the first sealing part 32 and the first opening 21 interference fit (that is, the area enclosed by the outer contour of the orthographic projection of the first sealing part 32 on the front sheet metal 2 is slightly larger than the opening area of ​​the first opening 21), the sealing gasket 3 and the front sheet metal 2 are sealed, which not only has a good sealing effect, but also has a simple structure and is easy to assemble.

[0038] Furthermore, combined Figure 3 , Figure 6 and Figure 8 As shown, the side of the sealing body 31 facing away from the front bulkhead sheet metal 2 is used to fit against the outer surface of the vehicle's air conditioning housing 300. This facilitates a compression seal between the two by pressing the side of the sealing body 31 facing away from the front bulkhead sheet metal 2 against the outer surface of the air conditioning housing 300, ensuring the effectiveness of the seal between the sealing gasket 3 and the air conditioning housing 300.

[0039] Furthermore, combined Figure 3 and Figure 6 As shown, the side of the sealing body 31 facing the front bulkhead sheet metal 2 is used to fit against the front bulkhead sheet metal 2. In this way, the contact area between the sealing gasket 3 and the front bulkhead sheet metal 2 is increased, thereby improving the sealing effect between the sealing gasket 3 and the front bulkhead sheet metal 2, further reducing interior noise, and reducing the risk of water leakage inside the vehicle.

[0040] Optionally, combined Figure 3 and Figure 4 As shown, the first sealing part 32 is a first sealing boss, which protrudes towards the front sheet metal 2 along the thickness direction of the sealing gasket 3.

[0041] In this embodiment, the shape of the first opening 21 on the front sheet metal 2 is adapted to the shape of the first sealing boss. That is, if the first sealing boss is an elliptical boss structure, then the first opening 21 is an elliptical hole; if the first sealing boss is a square boss structure, then the first opening 21 is a square hole. By setting the first sealing part 32 as the first sealing boss, the structure of the first sealing part 32 and even the sealing gasket 3 is simplified, making it easier to manufacture.

[0042] Optionally, combined Figure 3 and Figure 4As shown, the sealing gasket 3 also includes a second sealing part 33 connected to the sealing body 31. The second sealing part 33 is disposed around the first sealing part 32 and has a gap between it and the first sealing part 32. The second sealing part 33 abuts against the side of the front sheet metal 2 away from the expansion valve 1.

[0043] In this embodiment, the second sealing part 33 has an annular structure surrounding the first sealing part 32, and the second sealing part 33 and the front bulkhead sheet metal 2 are pressed together to form an abutment, thus forming a compression seal between the second sealing part 33 and the front bulkhead sheet metal 2. In this way, the arrangement of the second sealing part 33 can further increase the contact area between the sealing gasket 3 and the front bulkhead sheet metal 2, thereby further improving the sealing effect between the two, further reducing interior noise, and reducing the risk of water leakage inside the vehicle.

[0044] Optionally, combined Figure 3 and Figure 4 As shown, the second sealing part 33 is provided with a first sealing surface 331, which is in contact with the side of the front bulkhead 2 opposite to the expansion valve 1. This ensures that the second sealing part 33 is in contact with the front bulkhead 2 through the first sealing surface 331, thereby increasing the contact area between the sealing gasket 3 and the front bulkhead 2, improving the sealing effect, and reducing the risk of motor noise in the engine compartment and residual water seeping into the vehicle interior.

[0045] Optionally, combined Figure 3 and Figure 4 As shown, the second sealing part 33 is a second sealing boss, which protrudes towards the front sheet metal 2 along the thickness direction of the sealing gasket 3.

[0046] In this embodiment, by setting the second sealing part 33 as the second sealing boss, the structure of the second sealing part 33 and even the sealing gasket 3 is simplified, making it easier to manufacture.

[0047] Optionally, combined Figure 6 and Figure 8 As shown, the protrusion height of the second sealing part 33 is greater than the protrusion height of the first sealing part 32.

[0048] It should be noted that the protrusion height of the second sealing part 33 and the first sealing part 32 refers to the dimensions of the second sealing part 33 and the first sealing part 32 in the thickness direction of the sealing gasket 3, and also the dimensions of the second sealing part 33 and the first sealing part 32 in the X-axis direction.

[0049] In this embodiment, since the first sealing part 32 is interference-fitted with the first opening 21 on the front sheet metal 2 and typically extends slightly beyond the first opening 21, and the thickness of the front sheet metal 2 is generally small, the protrusion height of the first sealing part 32 is also relatively small. If the protrusion height of the second sealing part 33 is set to be less than or equal to the protrusion height of the first sealing part 32, the protrusion height of the second sealing part 33 is also relatively small, resulting in a smaller compressive force between the second sealing part 33 and the front sheet metal 2, which makes them prone to poor sealing under the vibration and impact generated during vehicle operation. Therefore, this embodiment sets the protrusion height of the second sealing part 33 to be greater than the protrusion height of the first sealing part 32 to increase the compression amount when the second sealing part 33 is pressed against the front sheet metal 2, thereby increasing the compressive force between the second sealing part 33 and the front sheet metal 2, and thus improving the sealing effect between the sealing gasket 3 and the front sheet metal 2.

[0050] Optionally, combined Figure 1 , Figure 3 , Figure 7 and Figure 8 As shown, the air conditioning expansion valve sealing device also includes a clamping member 4, which is used to clamp onto the air conditioning pipe 100 and is located between the sealing gasket 3 and the expansion valve 1, and the sealing gasket 3 abuts against the clamping member 4.

[0051] Specifically, the end of the air conditioning pipe 100 connected to the expansion valve 1 is usually provided with a ring of anti-detachment protrusions. The clamping member 4 is usually clamped on the air conditioning pipe 100 and located on the side of the anti-detachment protrusion away from the expansion valve 1. Moreover, the sealing gasket 3 is usually clamped between the clamping member 4 and the air conditioning unit 300.

[0052] In this embodiment, the sealing gasket 3 can be clamped onto the air conditioning pipe 100 using the clamping member 4 to prevent the sealing gasket 3 from moving along the air conditioning pipe 100 when it is squeezed and deformed, thereby ensuring the sealing between the sealing gasket 3 and the front sheet metal 2.

[0053] Optionally, combined Figure 1 , Figure 3 and Figure 6 As shown, the air conditioning sealing device also includes a sound insulation pad 5 with a second opening 51. The sound insulation pad 5 is connected to the side of the front sheet metal 2 away from the expansion valve 1, and the second sealing part 33 is interference-fitted with the second opening 51.

[0054] In this embodiment, the sound insulation pad 5 is typically bonded to the rear side of the front bulkhead sheet metal 2 using adhesive bonding. This allows the sound insulation pad 5 to block engine compartment noise and reduce interior noise. The area enclosed by the outer contour of the second sealing part 33's orthogonal projection on the front bulkhead sheet metal 2 is slightly larger than the opening area of ​​the second opening 51 on the sound insulation pad 5, resulting in an interference fit between the second sealing part 33 and the second opening 51. This achieves a seal between the sealing pad 3 and the second opening 51 of the sound insulation pad 5, resulting in a good sealing effect, a simple structure, and easy assembly.

[0055] Optionally, combined Figure 3 , Figure 4 and Figure 6 As shown, the sealing gasket 3 also includes a third sealing part 34, which is disposed around the edge of the second sealing part 33 away from the first sealing part 32, and abuts against the side of the sound insulation pad 5 away from the front sheet metal 2.

[0056] In this embodiment, the third sealing part 34 has an annular structure surrounding the outer edge of the second sealing part 33. That is, the third sealing part 34 is located on the outer ring of the second sealing part 33, and the first sealing part 32 is located on the inner ring of the second sealing part 33. The third sealing part 34 and the sound insulation pad 5 are pressed together to form a seal. In this way, by using the third sealing part 34 to abut against the side of the sound insulation pad 5 away from the front sheet metal 2, the sealing effect between the sealing pad 3 and the sound insulation pad 5 is further improved under the premise that the second sealing part 33 of the sealing pad 3 and the second opening 51 are interference-fitted, thereby further reducing the noise inside the vehicle and reducing the risk of water leakage inside the vehicle.

[0057] Optionally, combined Figure 3 , Figure 4 and Figure 6 As shown, the third sealing part 34 is provided with a second sealing surface 341, and the second sealing surface 341 is in contact with the side of the sound insulation pad 5 away from the front sheet metal 2.

[0058] In this way, the third sealing part 34 is pressed tightly against the sound insulation pad 5 through the second sealing surface 341, ensuring that the third sealing part 34 and the sound insulation pad 5 form a surface-to-surface contact, thereby increasing the contact area between the sealing pad 3 and the sound insulation pad 5, improving the sealing effect, and reducing the risk of motor noise in the engine compartment and residual water seeping into the vehicle.

[0059] Another embodiment of the present invention provides a vehicle including an air conditioning expansion valve sealing device as described above.

[0060] In addition to the aforementioned air conditioning expansion valve sealing device, the vehicle in this embodiment also includes an air conditioning pipe 100, an evaporator 200, and an air conditioning housing 300. The evaporator 200 is installed inside the air conditioning housing 300. One end of the air conditioning pipe 100 is connected to the evaporator 200, and the other end extends out of the air conditioning housing 300, passing through the sealing gasket 3, the clamping member 4, and the front bulkhead sheet metal 2, and connects to the expansion valve 1. Furthermore, the beneficial effects of the vehicle in this embodiment compared to the prior art are the same as those of the aforementioned air conditioning expansion valve sealing device, and will not be repeated here.

[0061] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A sealing device for an air conditioning expansion valve, characterized in that, Includes an expansion valve (1), a front bulkhead sheet metal (2), and a sealing gasket (3). The sealing gasket (3) is used to be fitted onto the air conditioning pipe (100) of the vehicle. The expansion valve (1) and the sealing gasket (3) are located on both sides of the front bulkhead sheet metal (2) and are respectively used to seal and connect with the air conditioning pipe (100). The expansion valve (1) is located on the side of the sealing gasket (3) facing the engine compartment. The sealing gasket (3) is sealed and connected with the front bulkhead sheet metal (2). The sealing gasket (3) includes a sealing body (31) and a first sealing part (32). A first opening (21) is provided on the front sheet metal (2) at a position corresponding to the sealing gasket (3). The first sealing part (32) is connected to the side of the sealing body (31) facing the front sheet metal (2) and is interference-fitted with the first opening (21). The first sealing part (32) is a first sealing boss, which protrudes towards the front sheet metal (2) along the thickness direction of the sealing gasket (3); The sealing gasket (3) further includes a second sealing part (33) connected to the sealing body (31). The second sealing part (33) is disposed around the first sealing part (32) and has a gap with the first sealing part (32). The second sealing part (33) abuts against the side of the front sheet metal (2) away from the expansion valve (1). The second sealing part (33) is a second sealing boss, which protrudes towards the front sheet metal (2) along the thickness direction of the sealing gasket (3); the protrusion height of the second sealing part (33) is greater than the protrusion height of the first sealing part (32).

2. The air conditioning expansion valve sealing device according to claim 1, characterized in that, The second sealing part (33) is provided with a first sealing surface (331), and the first sealing surface (331) is in contact with the side of the front sheet metal (2) away from the expansion valve (1).

3. The air conditioning expansion valve sealing device according to claim 1, characterized in that, It also includes a clamping member (4), which is used to clamp onto the air conditioning pipe (100) and is located between the sealing gasket (3) and the expansion valve (1), and the sealing gasket (3) abuts against the clamping member (4).

4. The air conditioning expansion valve sealing device according to claim 1, characterized in that, It also includes a sound insulation pad (5) with a second opening (51), the sound insulation pad (5) being connected to the side of the front sheet metal (2) away from the expansion valve (1), and the second sealing part (33) being interference-fitted with the second opening (51).

5. The air conditioning expansion valve sealing device according to claim 4, characterized in that, The sealing gasket (3) further includes a third sealing part (34), which is disposed around the edge of the second sealing part (33) away from the first sealing part (32) and abuts against the side of the sound insulation pad (5) away from the front sheet metal (2).

6. The air conditioning expansion valve sealing device according to claim 5, characterized in that, The third sealing part (34) is provided with a second sealing surface (341), and the second sealing surface (341) is in contact with the side of the sound insulation pad (5) away from the front sheet metal (2).

7. A vehicle, characterized in that, Includes the air conditioning expansion valve sealing device as described in any one of claims 1-6.

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