Bidirectional pressure release valve and vehicle lamp using same
By using a two-way pressure relief valve in the vehicle lights, and utilizing the cooperation between the screw body and the elastic tube, transient pressure difference regulation is achieved, which solves the problem of fog condensation in LED vehicle lights, reduces the processing difficulty, and improves the user experience.
Patent Information
- Application Number
- CN202520182500.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-06
AI Technical Summary
With existing vehicle lights using LED technology, the problem of fogging is difficult to solve effectively, especially due to the increased processing difficulty and risk of fogging caused by changes in thermodynamic conditions and complex structures.
A two-way pressure relief valve is adopted. By setting valve screw assemblies on both sides of the valve body, the transient pressure difference can be adjusted by the cooperation between the screw body and the elastic tube body, so as to maintain the gas pressure balance inside and outside the lamp, reduce the amount of gas exchange, and prevent fog condensation.
It effectively reduces the difficulty of manufacturing vehicle lights and transiently regulates gas exchange under unbalanced pressure conditions to prevent fog condensation and improve user experience.
Smart Images
Figure CN223938775U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle parts technology, and in particular to a two-way pressure relief valve and a vehicle light using the same. Background Technology
[0002] The problem of fogging in vehicle lights is often an issue that must be considered during the production process of vehicle lights. Generally, fogging in vehicle lights can enter through three different transfer mechanisms, adding moisture (i.e., the form of induced condensation) into the air inside the light: 1) water vapor adsorption by plastic parts and housing materials; 2) water vapor passing through the plastic housing and lens materials; 3) moisture transfer through convection and diffusion of the ventilation system.
[0003] Condensation occurs in automotive exterior lights when the lens temperature drops below the dew point inside the headlight. LED technology alters the thermodynamic conditions inside the lights, further increasing the risk of condensation. The main causes of fogging include: 1) LED lights emit less heat; 2) In LED lights, the heat source is located at the rear of the lamp, so less heat is directed towards the lens, resulting in a lower lens temperature (change in LED light source position); 3) New lights contain more electronic components, correspondingly increasing the amount of plastic, further increasing the amount of water released during heating; 4) As the lamp's structural design becomes more complex, the open path between the front and rear vents of the housing is restricted, further limiting the diffusion of moisture that could help counteract condensation.
[0004] Based on the above, existing technologies generally use desiccants to defog and reduce the risk of condensation on the lamp cover. However, with the development of LED lighting fixtures, these fixtures have become increasingly complex, with more parts, larger lamp bodies, and more areas with poor internal air circulation. Simply adding desiccants or rationally arranging air inlets and outlets is practically difficult. Therefore, to reduce the risk of condensation on the lamp cover from the perspective of reducing manufacturing difficulty, new structures need to be explored to achieve the above objectives. Utility Model Content
[0005] The primary objective of this invention is to provide a bidirectional pressure relief valve to address the technical problem of reducing manufacturing difficulty.
[0006] The second objective of this invention is to provide a vehicle lamp that addresses the technical problem of reducing the risk of fog condensation on the lamp cover while lowering the processing difficulty.
[0007] The bidirectional pressure relief valve of this utility model is implemented as follows:
[0008] A bidirectional pressure relief valve includes: a valve body, a waterproof cover over an opening on one side of the valve body, and a pair of valve screw assemblies respectively connected to two opposite ends of the valve body; wherein...
[0009] One of the valve screw assemblies is located inside the waterproof cover, and the other valve screw assembly is located on the side of the valve body facing away from the waterproof cover;
[0010] Each valve screw assembly includes a screw body with a hollow cavity connected to the valve body at one end, an opening on the side wall of the screw body that communicates with the hollow cavity, and an elastic tube fitted onto the screw body to cover the opening.
[0011] In an optional embodiment of this utility model, a raised abutment ring is provided on the outer side wall of the screw body; and
[0012] The abutment ring is suitable for contacting the outer wall surface of the valve body.
[0013] In an optional embodiment of this invention, the valve body is provided with a threaded hole for engaging with a portion of the screw body's thread; and
[0014] The gap between the screw body and the valve body is filled with waterproof sealant.
[0015] In an optional embodiment of this invention, the elastic tube is made of silicone.
[0016] In an optional embodiment of this invention, the elastic tube is adapted to form a sealing fit with the outer wall surface of the screw body.
[0017] In an optional embodiment of this invention, the screw body is made of metal; and
[0018] The outer wall surface of the screw body that is fitted with the elastic tube is rough.
[0019] In optional embodiments of this invention, the waterproof cover is snap-fitted or threaded onto the valve body.
[0020] In optional embodiments of this invention, the valve body is made of plastic or metal.
[0021] The vehicle light of this utility model is implemented as follows:
[0022] A vehicle light, comprising: the aforementioned bidirectional pressure relief valve.
[0023] In an optional embodiment of this utility model, a sealing ring is embedded in the circumferential edge of the end face of the valve body facing away from the waterproof cover.
[0024] By adopting the above technical solution, this utility model has the following beneficial effects: The bidirectional pressure relief valve and the vehicle lamp using it, through valve screw assemblies respectively set on both sides of the valve body, do not operate when the air pressure on both sides of the valve body is the same or has a small difference. Only when the pressure on one side of the valve body is greater than the pressure on the other side, a small gap appears between the screw body and the elastic tube in the valve screw assembly connected to the area on the side with the greater pressure, for pressure relief. When the pressure difference on both sides of the valve body nearly disappears after the pressurized gas is released, the screw body and the elastic tube will return to their sealed fit. That is, the adjustment of the pressure difference on both sides of the valve body is achieved through the fit between the screw body and the elastic tube. This process is completed instantaneously, and the amount of gas exchange is very small. For vehicle lamps using the bidirectional pressure relief valve of this utility model, the gas pressure difference between the inside and outside of the lamp can be maintained within a relatively balanced range, so that the pressure inside the lamp is neither too high nor too low, thus maintaining a reasonable level to ensure that the fully sealed lamp will not be damaged by pressure. On the other hand, when the pressure inside and outside the lamp is unbalanced, the lamp will transiently expel internal gas or transiently draw in external gas. The time is short and the amount of gas exchange is very small, which is insufficient to cause the water vapor to condense. Water mist will not be generated on the lampshade, which will lead to poor user experience or glare. Attached Figure Description
[0025] Figure 1 This is a first-view structural schematic diagram of the bidirectional pressure relief valve of this utility model;
[0026] Figure 2 This is a second-view structural schematic diagram of the bidirectional pressure relief valve of this utility model;
[0027] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along direction A;
[0028] Figure 4 This is a schematic diagram of the valve screw assembly of the bidirectional pressure relief valve of this utility model.
[0029] In the diagram: valve body 1, threaded hole 11, sealing ring 2, screw body 3, abutment ring 31, hollow cavity 32, screw head 35, opening 33, elastic tube 4, waterproof cover 5. Detailed Implementation
[0030] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0031] Example 1:
[0032] Please see Figures 1 to 4As shown, this embodiment provides a bidirectional pressure relief valve, including: a valve body 1, a waterproof cover 5 covering an opening 33 on one side of the valve body 1, and a pair of valve screw assemblies respectively connected to two opposite ends of the valve body 1. The valve body 1 may be made of plastic or metal. In terms of shape, both the valve body 1 and the waterproof cover 5 are generally cylindrical structures.
[0033] Specifically, one valve screw assembly is located inside the waterproof cover 5, and the other valve screw assembly is located on the side of the valve body 1 facing away from the waterproof cover 5. Each valve screw assembly includes a screw body 3 with a hollow cavity 32 connected to the valve body 1 at one end, an opening 33 on the side wall of the screw body 3 and communicating with the hollow cavity 32, and an elastic tube 4 fitted onto the screw body 3 to cover the opening 33. Optionally, the waterproof cover 5 is snap-fitted or threaded into the valve body 1. The specific shape of the opening 33 is not absolutely limited in this embodiment; it can be, for example, but not limited to, circular or rectangular.
[0034] More specifically, the outer wall of the screw body 3 is provided with a raised abutment ring 31; and the abutment ring 31 is adapted to abut against the outer wall surface of the valve body 1. The valve body 1 is provided with a threaded hole 11 for threaded engagement with a portion of the screw body 3; and the gap between the screw body 3 and the valve body 1 is filled with waterproof sealant. Based on this structure, that is, for the engagement between the valve body 1 and the screw body 3, there is not only the engagement of the threaded hole 11 in the axial dimension, but also the engagement of the valve body 1 and the abutment ring 31 in the radial dimension along the threaded hole 11, thereby fully ensuring the sealing engagement between the screw body 3 and the valve body 1. It should be noted here that the threaded hole 11 on the valve body 1 in this embodiment is a through hole. When not assembled with the screw body 3, the threaded hole 11 penetrates two different sides of the valve body 1, that is, the threaded hole 11 can realize the flow of gas between the inside and outside of the valve body 1.
[0035] In addition, it should be noted that the abutment ring 31 designed on the screw body 3 in this embodiment can also be used to form an axial limit for the elastic tube 4, so that one end of the elastic tube 4 can abut against the abutment ring 31, while the other end abuts against the screw head 35 of the screw body 3 for cooperating with the screwdriver. In this way, the elastic tube 4 as a whole will not be axially displaced relative to the screw body 3, thereby ensuring its sealing and covering effect on the opening 33 on the screw body 3 under normal conditions.
[0036] Based on the above structure, in one optional implementation, the elastic tube 4 is made of, for example, but not limited to, silicone material. Furthermore, it is necessary to note that the elastic tube 4 is adapted to form a sealing fit with the outer wall surface of the screw body 3. Here, the elasticity of the elastic tube 4 is directly utilized to achieve the sealing fit between the elastic tube 4 and the screw body 3 under normal conditions.
[0037] Based on the above, in one optional implementation, the screw body 3 is made of metal; and the outer wall surface of the screw body 3 that mates with the elastic tube 4 is roughened. This roughened surface design is to better utilize the elasticity of the elastic tube 4 to achieve a sealing fit between the screw body 3 and the elastic tube 4.
[0038] In summary, for the bidirectional pressure relief valve of this embodiment, by providing valve screw assemblies on both sides of the valve body 1, the bidirectional pressure relief valve does not work when the air pressure on both sides of the valve body 1 is the same or not significantly different. Only when the pressure on one side of the valve body 1 is greater than the pressure on the other side of the valve body 1, a small gap appears between the screw body 3 and the elastic tube 4 in the valve screw assembly connected to the area on the side with the greater pressure to relieve pressure. When the pressure difference on both sides of the valve body 1 is almost eliminated when the pressurized gas is released, the screw body 3 and the elastic tube 4 will return to their sealed fit. That is, the adjustment of the pressure difference on both sides of the valve body 1 is achieved through the fit between the screw body 3 and the elastic tube 4. This process is completed instantaneously, and the amount of gas exchange is also very small.
[0039] Example 2:
[0040] Based on the bidirectional pressure relief valve of Embodiment 1, this embodiment provides a vehicle lamp, including: the bidirectional pressure relief valve of Embodiment 1. In this case, the bidirectional pressure relief valve is mainly installed on the lamp housing. When the bidirectional pressure relief valve is applied in a specific lamp housing, the side of the valve body 1 with the waterproof cover 5 faces the outside of the lamp housing, while the side of the valve body 1 facing away from the waterproof cover 5 is located inside the lamp housing. Therefore, considering that the valve body 1 and the lamp housing form a reliable sealing fit, a sealing ring 2 is embedded in the circumferential edge of the end face of the valve body 1 facing away from the waterproof cover 5 for forming a sealing fit with the lamp housing.
[0041] For vehicle lights employing the bidirectional pressure relief valve of Embodiment 1, the pressure difference between the inside and outside of the lamp can be maintained within a relatively balanced range, ensuring that the internal pressure of the lamp is neither too high nor too low, thus maintaining a reasonable level to prevent the fully sealed lamp from being damaged by pressure. On the other hand, in the case of an imbalance between the internal and external pressures of the lamp, the lamp will transiently expel internal gas or transiently draw in external gas. The time is short and the amount of gas exchange is very small, insufficient to cause condensation of the drawn-in water vapor. Therefore, water mist will not form on the lamp cover, preventing problems such as poor user experience or glare.
[0042] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
[0043] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model 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 a limitation of this utility model.
[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 according to the specific circumstances.
[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, 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," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0046] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0047] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may 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" the first 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 first 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.
Claims
1. A bidirectional pressure relief valve, characterized in that, include: The valve body, a waterproof cover over an opening on one side of the valve body, and a pair of valve screw assemblies connected to two opposite ends of the valve body; wherein One of the valve screw assemblies is located inside the waterproof cover, and the other valve screw assembly is located on the side of the valve body facing away from the waterproof cover; Each valve screw assembly includes a screw body with a hollow cavity connected to the valve body at one end, an opening on the side wall of the screw body that communicates with the hollow cavity, and an elastic tube fitted onto the screw body to cover the opening.
2. The bidirectional pressure relief valve according to claim 1, characterized in that, The outer wall of the screw body is provided with a protruding abutment ring; and The abutment ring is adapted to abut against the outer wall surface of the valve body.
3. The bidirectional pressure relief valve according to claim 1 or 2, characterized in that, The valve body is provided with a threaded hole for engaging with a portion of the screw body's threads; and The gap between the screw body and the valve body is filled with waterproof sealant.
4. The bidirectional pressure relief valve according to claim 1, characterized in that, The elastic tube is made of silicone.
5. The bidirectional pressure relief valve according to claim 1 or 4, characterized in that, The elastic tube is adapted to form a sealing fit with the outer wall surface of the screw body.
6. The bidirectional pressure relief valve according to claim 1 or 4, characterized in that, The screw body is made of metal; and The outer wall surface of the screw body that is fitted with the elastic tube is rough.
7. The bidirectional pressure relief valve according to claim 1, characterized in that, The waterproof cover is snapped or threaded onto the valve body.
8. The bidirectional pressure relief valve according to claim 1 or 7, characterized in that, The valve body is made of plastic or metal.
9. A vehicle light, characterized in that, include: The bidirectional pressure relief valve as claimed in any one of claims 1 to 8.
10. The vehicle light according to claim 9, characterized in that, A sealing ring is embedded in the circumferential edge of the end face of the valve body facing away from the waterproof cover.