CN218565274U - Prevent that car light from sagging and reduce ventilation valve subassembly of car light fog - Google Patents
Prevent that car light from sagging and reduce ventilation valve subassembly of car light fog Download PDFInfo
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- CN218565274U CN218565274U CN202222568420.2U CN202222568420U CN218565274U CN 218565274 U CN218565274 U CN 218565274U CN 202222568420 U CN202222568420 U CN 202222568420U CN 218565274 U CN218565274 U CN 218565274U
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Abstract
The utility model relates to a ventilation valve field discloses a prevent that car light from sagging and reduce ventilative valve module of car light fog, and it includes the main casing body, ventilative lid, goes up ventilated membrane, drier and lower ventilated membrane. The main casing is internally provided with a through cavity, the upper breathable film is arranged at the upper end of the cavity, the drying agent is arranged below the upper breathable film, the lower breathable film is arranged below the drying agent, and the breathable channel for communicating the upper breathable film and the lower breathable film is arranged on the drying agent. The side of the main shell body is provided with a plurality of bulges, the ventilation cover is sleeved on the main shell body and is attached to the bulges, and ventilation holes are formed in the bulges, the outer side surface of the main shell body and the inner side surface of the ventilation cover. The utility model can not only effectively control the condensation phenomenon of the car lamp, but also reduce the occurrence of sagging phenomenon; and the upper breathable film and the lower breathable film on the breathable valve can effectively balance the internal and external pressure difference of the power transmission system shell, and prevent the shell from deforming and damaging a sealing piece to cause the invasion of impurities such as dust, water, pollen and the like.
Description
Technical Field
The utility model belongs to the technical field of the breather valve and specifically relates to a prevent that car light from sagging and reduce breather valve subassembly of car light fog.
Background
With the development of economy, china has more and more occupied the global automobile lamp market. At present, the automobile lamp industry in China has dispersed competitive patterns, and brand enterprises are more. The problem of fog of the car lamp is a great trouble problem for car lamp enterprises. The general way in which vehicle lamp mist enters can add moisture (i.e., in the form of induced condensation) to the air inside the headlamp through three different transfer mechanisms: 1) Water vapor adsorption of plastic parts and housing materials; 2) Water vapor permeates the plastic housing and lens material; 3) Convection and diffusion moisture transfer through the ventilation system.
When the temperature of the lens drops below the dew point inside the lamp, condensation occurs in the lamp outside the automobile. LED technology changes the thermodynamic conditions inside the luminaire, further increasing the risk of condensation formation. The main causes of fogging include: 1) The LED lamp emits less heat; 2) In LED lamps, the heat source is located at the rear of the lamp, so less heat is directed to the lens, resulting in a decrease in lens temperature (variation in LED lamp source location); 3) New lamps contain more electronic components, correspondingly increasing the amount of plastic, further increasing the amount of water released during heating; 4) As the structural design of the lamp becomes more complex, the open path between the front and rear vents of the housing is restricted, further limiting the diffusion of moisture that may help counteract condensation.
The problem of solving car light fog at present, the scheme that adopts mainly includes: 1) Convection systems (rubber tubes/covers with labyrinth or open-cell foam, or cap holes with non-woven material) provide little diffusive moisture transport; 2) Diffuser system with e-PTFE membrane vents-continuous equalization of pressure for many applications and prevention of dust and water ingress. The membrane vents also transfer moisture from the lamp envelope (by diffusion), whether moving or stationary. However, diffusion is a passive process that depends on environmental conditions and lamp internal conditions; 3) The antifog coatings do not remove any moisture-they change the energy of the inner lens surface, causing condensation "paper" rather than staying in the droplets. Such coatings limit lens design options. And they have a limited lifetime, after which water droplets will form, creating spots and streaks inside the lens; 4) Non-regenerable desiccant pouches are sometimes placed in light fixtures or light packages to prevent moisture during shipping and storage. Depending on the amount of desiccant and relative humidity, these bags may run for weeks or months until they become saturated. By then they stop functioning; 5) The fan (blowing hot air from the heat sink to the lens) will dry the lens faster, but will not do anything to lower the dew point or moisture within the headlamp housing.
Such problems are perceived in the market, and the proposed solution products mainly comprise car lamp breathable films, car lamp breathable caps, CMD, drying bags and the like.
The breathable film for vehicle lamps is generally composed of 100% eptfe or a fabric substrate with non-woven fabric or nylon and polyester, and is integrated on the vehicle lamp shell in the form of a back adhesive, the permanent effectiveness of the double-sided adhesive is examined by the scheme, and meanwhile, the breathable film is exposed, i.e., is not protected, once the breathable film is repaired by a vehicle, the breathable film is possibly damaged, so that dust, pollutants and water enter the inside of the vehicle lamp shell to influence the lighting effect of the vehicle.
Although the structure of the car lamp ventilating cap is greatly changed, the ventilating film in the core structure is protected, and the installation is more reliable, the structure diffusion is still a passive process depending on environmental conditions and internal conditions of the lamp;
CMD has the effect of actively defogging both structurally and functionally, but has very high cost and is unacceptable to many vehicle lamp enterprises in today's intense market competition.
The desiccant packet is characterized by a rapid absorption of the fog inside the vehicle lamp, but its effect is short-lived, possibly for several months, mainly because it is directly exposed to the environment inside the vehicle lamp.
Meanwhile, fog is also one of the main factors causing the sagging phenomenon, i.e., a white substance is formed on the inner surface of the outer lens of the vehicle lamp and is visible within the normal perception range of the customer, which may also cause customer complaints.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the prior vehicle lamp generates fog and runs, and provides a ventilation valve component which can prevent the vehicle lamp from running and reduce the fog of the vehicle lamp, thereby not only effectively controlling the condensation phenomenon of the vehicle lamp, but also effectively reducing the running phenomenon; and the internal and external pressure difference of the shell of the power transmission system can be effectively balanced.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a ventilation valve component for preventing vehicle lamp sagging and reducing vehicle lamp fog, which comprises a main shell, a ventilation cover, an upper ventilation film, a drying agent and a lower ventilation film; the main casing is internally provided with a through cavity, the upper breathable film is arranged at the upper end of the cavity, a drying agent is arranged below the upper breathable film, and the lower breathable film is arranged below the drying agent. The arrangement of the drying agent can quickly absorb the mist in the car lamp. The main function of first ventilated membrane prevents during external pollutant, water etc. directly enter into the drier in the TPE main part, also plays the inside and outside pressure differential of quick equilibrium car light shell simultaneously, prevents that the lamp body from leading to the entering of external moisture because of too big negative pressure. The primary function of the second breathable film is to prevent the desiccant from falling into the interior of the vehicle lamp. The first breathable film and the second breathable film can perform comprehensive protection effect on the drying agent, so that the pressure difference inside the shell is remarkably reduced, the absorbed water vapor is also remarkably reduced, and the service life of the drying agent is also greatly prolonged.
And a ventilation channel for communicating the upper ventilation film with the lower ventilation film is arranged on the drying agent. Hard lump may appear when the drier absorbs moisture and reachs the state of saturation, and the setting of ventilation channel can continue to provide effectual ventilated membrane passageway for first ventilated membrane and second ventilated membrane, prevents the ventilation function inefficacy of ventilated membrane.
The side of the main shell body is provided with a plurality of bulges, and the ventilation cover is sleeved on the main shell body and attached to the bulges, so that the ventilation film is protected. The bulges, the outer side surface of the main shell and the inner side surface of the breathable cover form air holes, so that air is ventilated from the side surface, and pollutants can be better prevented from entering the cavity.
Further, the air permeability of the upper breathable film is 200-1000 ml/cm2/min @70mbar, and the protection grade is IP68 or IP69K.
Further, the upper breathable film comprises a first PTFE porous waterproof breathable film layer and a support material layer; the upper breathable film is of a three-layer structure of a first PTFE porous waterproof breathable film layer + a support material layer + a first PTFE porous waterproof breathable film layer or a double-layer structure of the first PTFE porous waterproof breathable film layer + the support material layer.
Further, the air permeability of the first PTFE porous waterproof breathable membrane layer is 500-1500 ml/cm2/min @70mbar, and the protection grade is IP67.
Further, the support material layer is one of polyester non-woven fabric, polypropylene square grid, nylon material, polyester taffeta fabric and taffeta fabric.
Furthermore, the support material layer is a polyester non-woven fabric, and the thickness of the polyester non-woven fabric is 0.1-0.15 mm.
Further, the drying agent is magnesium chloride silica gel, montmorillonite or powdered calcium chloride.
Further, the lower breathable film comprises a second PTFE porous waterproof breathable film layer and a support material layer; the upper breathable film is of a three-layer structure of a second PTFE porous waterproof breathable film layer + a support material layer + a second PTFE porous waterproof breathable film layer or a double-layer structure of the second PTFE porous waterproof breathable film layer + the support material layer.
Further, the air permeability of the second PTFE porous waterproof breathable film layer is 5000-10000 ml/cm2/min @70mbar, and the protection grade is IP54.
Further, the ventilative lid is PA, PBT, PC or PP material's ventilative lid, and the main casing is the main casing of PVC, polyurethane, TPU or TPE material.
The utility model discloses an useful part does:
the utility model can effectively control the condensation phenomenon of the car lamp and reduce the occurrence of sagging phenomenon through the arrangement of the ventilating cover, the upper ventilating film, the drying agent, the lower ventilating film and the ventilating channel; and the upper breathable film and the lower breathable film on the breathable valve can effectively balance the internal and external pressure difference of the power transmission system shell, and prevent the shell from deforming and damaging a sealing piece to cause the invasion of impurities such as dust, water, pollen and the like.
Drawings
Fig. 1 is a schematic structural diagram of the present embodiment.
Fig. 2 is an exploded view of the present embodiment.
Fig. 3 is a bottom view of the present embodiment.
Fig. 4 isbase:Sub>A cross-sectional view taken alongbase:Sub>A-base:Sub>A of fig. 3.
Description of the main component symbols:
1. a main housing 11, a cavity 12, a protrusion;
2. a ventilation cover;
3. an upper breathable film 31, a first PTFE porous waterproof breathable film layer;
4. a desiccant 41, a ventilation channel;
5. a lower breathable film 51 and a second PTFE porous waterproof breathable film layer;
6. a layer of support material;
7. and (4) air holes.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, the utility model discloses a ventilation valve assembly for preventing vehicle lamp sagging and reducing vehicle lamp fog, which comprises a main housing 1, a ventilation cover 2, an upper ventilation membrane 3, a drying agent 4 and a lower ventilation membrane 5. A through cavity 11 is arranged in the main shell 1, the upper air-permeable membrane 3 is arranged at the upper end of the cavity 11, a drying agent 4 is arranged below the upper air-permeable membrane 3, and a lower air-permeable membrane 5 is arranged below the drying agent 4.
The drying agent 4 can quickly absorb the fog in the vehicle lamp. The first breathable film has the main function of preventing external pollutants, water and the like from directly entering the drying agent 4 of the main shell 1, and simultaneously playing a role in quickly balancing the internal and external pressure difference of the shell of the car lamp and preventing the lamp shell from entering external moisture due to overlarge negative pressure. The main function of the second air permeable membrane is to prevent the desiccant 4 from falling into the interior of the vehicle lamp. The first breathable film and the second breathable film can perform comprehensive protection effect on the drying agent 4, so that the pressure difference inside the shell is obviously reduced, the absorbed water vapor is also obviously reduced, and the service life of the drying agent 4 is also greatly prolonged.
The desiccant 4 is provided with a ventilation passage 41 for communicating the upper and lower gas-permeable membranes 3 and 5. When the desiccant 4 absorbs moisture and reaches a saturated state, a hard block may appear, and the ventilation channel 41 can continue to provide an effective ventilation membrane channel for the first ventilation membrane and the second ventilation membrane, so that the ventilation function of the ventilation membranes is prevented from failing.
The side of the main casing body 1 is provided with a plurality of bulges 12, and the ventilation cover 2 is sleeved on the main casing body 1 and is attached to the bulges 12 to protect the ventilation film. The bulges 12, the outer side surface of the main shell 1 and the inner side surface of the ventilation cover 2 form ventilation holes 7, so that ventilation is realized from the side surface, and pollutants can be better prevented from entering the cavity 11.
Wherein, the air permeability of the upper breathable film 3 is 200-1000 ml/cm2/min @70mbar, and the protection grade is IP68 or IP69K.
The upper breathable film 3 includes a first PTFE porous waterproof breathable film layer 31 and a support material layer 6. The upper breathable film 3 is a three-layer structure of a first PTFE porous waterproof breathable film layer 31+ a support material layer 6+ a first PTFE porous waterproof breathable film layer 31 or a two-layer structure of the first PTFE porous waterproof breathable film layer 31+ the support material layer 6. The layers can be compounded by adopting a hot pressing or dispensing mode. Preferably, a hot-pressing composite process is adopted, and the structure adopts a double-layer structure.
Specifically, the air permeability of the first PTFE porous waterproof air-permeable membrane layer 31 is 500-1500 ml/cm2/min @70mbar, and the protection grade is IP67. The second PTFE porous waterproof breathable film can be prepared by the process method disclosed in the invention patent No. CN 110982203B.
The support material layer 6 is one of polyester non-woven fabric, polypropylene square grid, nylon material, polyester taffeta fabric and taffeta fabric. The supporting material layer 6 is preferably a polyester non-woven fabric substrate with excellent aging resistance, and the thickness is 0.15-0.25 mm.
Wherein, the drying agent 4 is magnesium chloride silica gel, montmorillonite or powdered calcium chloride.
Wherein the lower breathable film 5 comprises a second PTFE porous waterproof breathable film layer 51 and a support material layer 6. The upper breathable film 3 is a three-layer structure of a second PTFE porous waterproof breathable film layer 51+ a support material layer 6+ a second PTFE porous waterproof breathable film layer 51 or a two-layer structure of the second PTFE porous waterproof breathable film layer 51+ the support material layer 6. The layers can be compounded by adopting a hot pressing or dispensing mode. Preferably, a hot-pressing composite process is adopted, and the structure adopts a double-layer structure.
Wherein the ventilative volume of the porous waterproof ventilative rete 51 of second PTFE is 5000 ~ 10000ml/cm2/min @70mbar, and its main function plays dustproof powder drier 4 and falls into inside the car lamp casing, so, the porous waterproof ventilative rete 51 of second PTFE adopts IP 54's protection level ventilated membrane product. The second PTFE porous waterproof breathable film can be prepared by the process method disclosed in the invention patent No. CN 110982203B.
Wherein, the ventilation cover 2 is made of PA, PBT, PC or PP. The main casing body 1 is a main casing body made of thermoplastic materials such as PVC, polyurethane, TPU or TPE, and the main casing body 1 is preferably made of TPE with better elastic effect.
The first PTFE porous waterproof breathable membrane layer 31 and the second PTFE porous waterproof breathable membrane layer 51 need to pass the 8-stage oleophobic modification test. The oleophobic property test is tested by the American Association of textile chemists and dyeing chemists (AATCC) 118-1989 standard, and the test method is as follows: a liquid with known surface tension is dripped on the surface of the membrane material, and the wetting condition is observed, wherein the process is the process of the liquid entering the membrane structure.
In conclusion, the utility model can not only effectively control the condensation phenomenon of the car lamp, but also reduce the occurrence of the sagging phenomenon; and the upper breathable film and the lower breathable film on the breathable valve can effectively balance the internal and external pressure difference of the power transmission system shell, and prevent the shell from deforming and damaging a sealing piece to cause the invasion of impurities such as dust, water, pollen and the like.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (10)
1. A ventilation valve assembly for preventing vehicle lamps from sagging and reducing vehicle lamp fog is characterized in that: comprises a main shell, a breathable cover, an upper breathable film, a drying agent and a lower breathable film; a through cavity is arranged in the main shell, the upper breathable film is arranged at the upper end of the cavity, a drying agent is arranged below the upper breathable film, a lower breathable film is arranged below the drying agent, and a breathable passage communicated with the upper breathable film and the lower breathable film is arranged on the drying agent; the side of the main shell body is provided with a plurality of bulges, the ventilation cover is sleeved on the main shell body and attached to the bulges, and ventilation holes are formed in the bulges, the outer side surface of the main shell body and the inner side surface of the ventilation cover.
2. The vent valve assembly for preventing vehicle light sagging and reducing vehicle light fog of claim 1, wherein: the air permeability of the upper breathable film is 200-1000 ml/cm2/min @70mbar, and the protection grade is IP68 or IP69K.
3. The vent valve assembly that prevents vehicle light sagging and reduces vehicle light fog according to claim 2, wherein: the upper breathable film comprises a first PTFE porous waterproof breathable film layer and a support material layer; the upper breathable film is of a three-layer structure of a first PTFE porous waterproof breathable film layer + a support material layer + a first PTFE porous waterproof breathable film layer or a double-layer structure of the first PTFE porous waterproof breathable film layer + the support material layer.
4. The vent valve assembly for preventing vehicle light sagging and reducing vehicle light fog of claim 3, wherein: the air permeability of the first PTFE porous waterproof breathable film layer is 500-1500 ml/cm2/min @70mbar, and the protection grade is IP67.
5. The vent valve assembly that prevents vehicle light sagging and reduces vehicle light fog according to claim 3, wherein: the support material layer is one of polyester non-woven fabrics, polypropylene square grids, nylon materials, polyester taffeta fabrics and taffeta fabric.
6. The vent valve assembly of claim 5, wherein the vent valve assembly is configured to prevent vehicle light sagging and reduce vehicle light fogging: the support material layer is made of polyester non-woven fabric, and the thickness of the polyester non-woven fabric is 0.1-0.15 mm.
7. The vent valve assembly for preventing vehicle light sagging and reducing vehicle light fog of claim 1, wherein: the desiccant is magnesium chloride silica gel, montmorillonite or powdered calcium chloride.
8. The vent valve assembly for preventing vehicle light sagging and reducing vehicle light fog of claim 1, wherein: the lower breathable film comprises a second PTFE porous waterproof breathable film layer and a support material layer; the upper breathable film is of a three-layer structure of a second PTFE porous waterproof breathable film layer + a support material layer + a second PTFE porous waterproof breathable film layer or a double-layer structure of the second PTFE porous waterproof breathable film layer + the support material layer.
9. The vent valve assembly for preventing vehicle light sagging and reducing vehicle light fog of claim 8, wherein: the air permeability of the second PTFE porous waterproof breathable film layer is 5000-10000 ml/cm < 2 >/min @70mbar, and the protection grade is IP54.
10. The vent valve assembly that prevents vehicle light sagging and reduces vehicle light fog according to claim 1, wherein: the ventilative lid is PA, PBT, PC or PP material's ventilative lid, and the main casing body is the main casing body of PVC, polyurethane, TPU or TPE material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222568420.2U CN218565274U (en) | 2022-09-27 | 2022-09-27 | Prevent that car light from sagging and reduce ventilation valve subassembly of car light fog |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222568420.2U CN218565274U (en) | 2022-09-27 | 2022-09-27 | Prevent that car light from sagging and reduce ventilation valve subassembly of car light fog |
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| Publication Number | Publication Date |
|---|---|
| CN218565274U true CN218565274U (en) | 2023-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222568420.2U Active CN218565274U (en) | 2022-09-27 | 2022-09-27 | Prevent that car light from sagging and reduce ventilation valve subassembly of car light fog |
Country Status (1)
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|---|---|
| CN (1) | CN218565274U (en) |
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2022
- 2022-09-27 CN CN202222568420.2U patent/CN218565274U/en active Active
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