Heat dissipation and demisting device for car lamp

Abstract

The utility model discloses a car lamp radiating and demisting device which comprises a radiator, a bidirectional fan and a demisting assembly which are sequentially arranged in the direction from the interior of a car lamp to the exterior of the car lamp, and the two ends of the bidirectional fan are connected with the radiator and the demisting assembly respectively. The demisting assembly comprises a tubular support, a one-way valve and an annular drying agent, wherein the one-way valve and the annular drying agent are located in the tubular support, and the annular drying agent is located in a radial gap between the tubular support and the one-way valve. And the one-way valve is unidirectionally conducted from the outside to the inside of the automobile lamp. The one-way valve and the annular drying agent are arranged in the demisting assembly and located on the same section, when air is sucked into the automobile lamp, the one-way valve is closed, and external air enters the automobile lamp after being dehumidified by the annular drying agent; when the air is exhausted outwards, the air can be exhausted through the one-way valve, compared with a traditional mode that the air is filtered through a dehumidification layer, the opening of the one-way valve can directly allow the air to pass through, and rapid exhaust and heat dissipation are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to car lamp technical field especially relates to a car lamp heat dissipation defogging device. BACKGROUND

[0002] With the intelligent trend of car lamp, car lamp design is increasingly complex, heat dissipation and defogging are two big difficulties in car lamp design. The moisture outside the lamp enters the lamp through the air permeable component and is absorbed by the plastic part, the plastic part releases moisture when heated during the operation of the high-power module, and the high-temperature and high-humidity gas flowing through the lampshade cold zone is easy to form fog. At present, in view of the above problems, the common methods include coating an anti-fog coating on the light distribution mirror, placing a built-in desiccant, and a fan and air duct combination, etc. The traditional defogging scheme has slow dehumidification speed, among them, the fan and air duct combination design structure is complex, and is often limited by the lamp structure and is difficult to realize.

[0003] The patent number CN205878098U discloses a kind of car lamp heat-resistant defogging fan, by arranging fan blade layer, dehumidification layer, dust removal layer in rack, reach the effect of cooling and dehumidification, since dehumidification layer is arranged in a partition layer across in rack, for bidirectional fan, air inlet and air outlet will pass through dehumidification layer, the existence of dehumidification layer can reduce gas flow speed, and in theory, it is not necessary to carry out dehumidification treatment when fan exhausts, therefore, the patent reduces the speed of gas exhaust to a certain extent, thereby reducing the dehumidification speed and limiting the risk of fog prevention, and it can also reduce the heat dissipation speed, thereby causing the temperature of car lamp to be too high. SUMMARY

[0004] In order to solve the technical problems of slow dehumidification speed, complex structure and slow exhaust speed of the existing car lamp defogging device, the utility model provides a car lamp heat dissipation defogging device to solve the above problems.

[0005] The utility model solves the technical problems and adopts the technical scheme: a kind of car lamp heat dissipation defogging device, including heat sink, bidirectional fan and defogging component that are sequentially arranged from car lamp inside to car lamp outside direction, the two ends of the bidirectional fan are connected with heat sink and defogging component respectively, the defogging component includes tubular support, one-way valve in the tubular support interior and annular desiccant, the annular desiccant is located between the radial clearance between tubular support and one-way valve;The one-way valve is one-way conducted from car lamp outside to inside.

[0006] In the optional embodiment of the utility model, the one-way valve is a duckbill valve.

[0007] In the optional embodiment of the utility model, the one-way valve includes annular baffle fixed with annular desiccant and movable gasket movably connected with the annular baffle, when air flows from inside to outside of the vehicle lamp, the movable gasket separates from the annular baffle, when air flows from outside to inside of the vehicle lamp, the movable gasket adheres to the annular baffle.

[0008] In the optional embodiment of the utility model, the annular desiccant is filled with recyclable desiccant.

[0009] In the optional embodiment of the utility model, the tubular support is fixedly connected with the shell of the vehicle lamp.

[0010] In the optional embodiment of the utility model, the temperature and humidity sensor is arranged inside the vehicle lamp.

[0011] In the optional embodiment of the utility model, the tubular support is fixedly connected with the shell of the vehicle lamp.

[0012] The utility model discloses the beneficial effect is:

[0013] The utility model discloses the one-way valve and annular desiccant are arranged in the defogging subassembly, and the one-way valve and annular desiccant are located at the same section, when inhaling to the inside of the vehicle lamp, the one-way valve closes, and the outside air enters the inside of the vehicle lamp after the annular desiccant dehumidification, when exhausts outward, gas can pass through the one-way valve and exhausts, compared with the traditional dehumidification layer filtration, the opening of one-way valve can directly supply gas, and it is favorable to fast exhaust and heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further explained below in combination with the drawings and examples.

[0015] Figure 1 It is the structure schematic diagram of the specific embodiment of the vehicle lamp heat dissipation defogging device of the utility model.

[0016] In the drawing, 1, radiator, 2, bidirectional fan, 3, defogging subassembly, 301, tubular support, 302, one-way valve, 303, annular desiccant, 304, waterproof breathable membrane, 4, annular baffle, 5, movable gasket. PREFERRED EMBODIMENT

[0017] The embodiment of the utility model is described in detail below, the example of the embodiment is shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar function throughout. The embodiment described below by referring to the drawings is exemplary, only for explaining the utility model, and can not be understood as the limitation of the utility model.

[0018] Example one

[0019] As Figure 1 shown, a car lamp heat dissipation defogging device, comprising a heat sink 1, a bidirectional fan 2 and a defogging assembly 3 arranged in turn from inside to outside of the car lamp, the two ends of the bidirectional fan 2 are connected with the heat sink 1 and the defogging assembly 3 respectively, the defogging assembly 3 comprises a tubular support 301, a one-way valve 302 inside the tubular support 301 and an annular desiccant 303, the annular desiccant 303 is located between the radial gap between the tubular support 301 and the one-way valve 302; the one-way valve 302 is one-way conducted from outside to inside of the car lamp.

[0020] The heat sink 1 is locked with the bidirectional fan 2 by screws, the heat sink 1 is distributed with a plurality of heat dissipation fins, the bidirectional fan 2 can bidirectionally send air to the heat sink 1, so as to realize the heat dissipation effect, the bidirectional sending air refers to that the air can be absorbed from outside to inside, and the air can also be discharged from inside to outside, the one-way valve 302 only allows the airflow to flow from inside to outside of the car lamp; a ring space is left around the one-way valve 302, and the ring space is filled with the annular desiccant 303. When the bidirectional fan 2 inhales air relative to the heat sink 1, that is, the air direction is from inside to outside of the lamp, the one-way valve 302 is opened outward, the high-temperature and high-humidity gas in the inside of the car lamp mainly leaves the inside of the lamp through the one-way valve 302, so as to quickly discharge the high-temperature and high-humidity gas near the heat source, and then inhale and dry the external air, effectively reduce the humidity in the inside of the car lamp, and fundamentally prevent the fog from being generated; when the bidirectional fan 2 blows air relative to the heat sink 1, that is, the air direction is from outside to inside of the lamp, the one-way valve 302 is in a closed state, after the external air is inhaled into the inside of the lamp, the air can only enter after being dried through the annular desiccant 303, and the dried air can reduce the humidity in the inside of the car lamp, prevent the fog from being generated, and accelerate the dissipation of the generated fog.

[0021] The utility model discloses simple structure can realize fast dehumidification under the action of bidirectional fan 2, and can heat rapidly through one-way valve 302 when exhausting, avoid overheating in the inside of car lamp.

[0022] The one-way valve 302 can be a duckbill valve, or the following structure can be adopted: the one-way valve 302 comprises an annular baffle 4 fixed with the annular desiccant 303 and a movable gasket 5 movably connected with the annular baffle 4, when the air flows from the inside to the outside of the car lamp, the movable gasket 5 is separated from the annular baffle 4, when the air flows from the outside to the inside of the car lamp, the movable gasket 5 is attached to the annular baffle 4. The movable gasket 5 can be hinged on one side of the annular baffle 4, and connected through a pull rope or a spring on the other side, when the one-way valve 302 is opened, the movable gasket 5 rotates like a door to open, and the pull rope or the spring is used to avoid that the opening angle of the movable gasket 5 is too large to reset.

[0023] The tubular support 301 can be fixed with the shell of the bidirectional fan 2, in order to facilitate the dismounting and replacement of the bidirectional fan 2, preferably, the tubular support 301 is fixedly connected with the shell of the car lamp.

[0024] Embodiment two

[0025] On the basis of the above embodiment, the annular desiccant 303 is filled with a recyclable desiccant, which is a prior art and can be purchased on the market, and the recyclable desiccant is a desiccant that can dehumidify at high temperature. When the wind direction is from inside to outside the lamp, part of the high-temperature and high-humidity gas passes through the annular desiccant 303, which can assist the desiccant to dehumidify and leave the inside of the vehicle lamp, thereby reducing the humidity inside the vehicle lamp and preventing fog from being generated.

[0026] Embodiment three

[0027] On the basis of the above embodiment, the tubular support 301 is sealed at the end away from the bidirectional fan 2 with a waterproof and breathable film 304, which can block moisture and prevent moisture from entering the inside of the vehicle lamp through the one-way valve 302.

[0028] Embodiment four

[0029] On the basis of the above embodiment, the vehicle lamp heat dissipation and defogging device further comprises a temperature and humidity sensor located inside the vehicle lamp. The temperature and humidity sensor is used to monitor the temperature and humidity inside the vehicle lamp in real time. When the temperature and humidity reach the preset threshold, the control module controls the bidirectional fan 2 to start, and cools and dehumidifies the inside of the vehicle lamp. When the humidity inside the vehicle lamp is reduced to a reasonable range and the power module is not started and does not need to be cooled, the control module stops the bidirectional fan 2 from running, so as to avoid excessive exhaust and waste of energy.

[0030] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments in a suitable manner.

[0031] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents described in the specification, and must be determined according to the scope of the claims.

Claims

1. A defogging device for a vehicle lamp, installed in the interior of the vehicle lamp, characterized in that: The application relates to a vehicle lamp, which comprises, from inside to outside, a radiator (1), a bidirectional fan (2) and a defogging assembly (3), the two ends of the bidirectional fan (2) are connected with the radiator (1) and the defogging assembly (3) respectively, the defogging assembly (3) comprises a tubular support (301), a one-way valve (302) located inside the tubular support (301) and an annular desiccant (303), the annular desiccant (303) is located between the radial gap between the tubular support (301) and the one-way valve (302); the one-way valve (302) is unidirectionally communicated from the outside to the inside of the vehicle lamp.

2. The vehicle lamp heat dissipation defogging device according to claim 1, characterized in that: The one-way valve (302) is a duckbill valve.

3. The vehicle lamp heat dissipating defogging device of claim 1, wherein: The one-way valve (302) comprises an annular baffle (4) fixed with the annular desiccant (303) and a movable gasket (5) movably connected with the annular baffle (4), when air flows from the inside to the outside of the vehicle lamp, the movable gasket (5) is separated from the annular baffle (4), and when air flows from the outside to the inside of the vehicle lamp, the movable gasket (5) is attached to the annular baffle (4).

4. The vehicle lamp heat dissipating defogging device of claim 1, wherein: The annular desiccant (303) is filled with recyclable desiccant.

5. The vehicle lamp heat dissipating defogging device of claim 1, wherein: The tubular support (301) is fixedly connected with the shell of the vehicle lamp.

6. The vehicle lamp heat dissipating defogging device of claim 1, wherein: A temperature and humidity sensor is further arranged inside the vehicle lamp.

7. The vehicle lamp heat dissipating defogging device of claim 1, wherein: The end of the tubular support (301) far away from the bidirectional fan (2) is blocked by a waterproof and breathable film (304).

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