Dehumidifier for lamp of vehicle and lamp including the same

1 . A dehumidifier for a lamp of a vehicle comprising:

a dust cover configured to be coupled to a vehicle lamp housing of the lamp of the vehicle, the dust cover including a first communication hole therein;

a desiccant;

an absorbent cover coupled to the dust cover, wherein the desiccant is accommodated between the dust cover and the absorbent cover, wherein the absorbent cover includes a second communication hole therein, and wherein the second communication hole corresponds to the communication hole; and

a valve comprising:

a first bracket,

a second bracket coupled to the first bracket, and

a shape memory alloy disposed between the first bracket and the second bracket such that the valve is configured to selectively block the first communication hole and the second communication hole using the first bracket and the second bracket, respectively, by the first bracket and the second bracket being moved by the shape memory alloy being deformed by a temperature difference between an inside of the dust cover and an outside of the dust cover.

2 . The dehumidifier of claim 1 , wherein the valve comprises an opening/closing plate including the shape memory alloy and configured to be deformed into a first shape and a second shape according to a temperature change in the dust cover, thereby causing the first bracket and the second bracket to reciprocally move in a first direction;

wherein the first bracket is disposed on a first side of the opening/closing plate and wherein the first bracket includes a first blocking portion corresponding to the first communication hole; and

wherein the second bracket is disposed on a second side of the opening/closing plate and wherein the second bracket includes a second blocking portion corresponding to the second communication hole.

3 . The dehumidifier of claim 2 , wherein the first bracket and the second bracket are coupled by a coupling member so as to be able to move as one body.

4 . The dehumidifier of claim 3 , wherein the coupling member comprises:

a hook groove in one of the first bracket or the second bracket; and

a hook protrusion on another of the first bracket or the second bracket, wherein the hook protrusion is engaged into the hook groove.

5 . The dehumidifier of claim 2 , further comprising a guide member configured to guide a movement of the first bracket and the second bracket.

6 . The dehumidifier of claim 5 , wherein the guide member comprises:

a first guide boss on the dust cover;

a first guide hole in the first bracket and configured such that the first guide hole can be movable relative to the first guide boss and such that the first guide boss can be inserted into the first guide hole;

a second guide boss on the absorbent cover; and

a second guide hole in the second bracket and configured such that the second guide hole can be movable relative to the second guide boss and such that the second guide boss can be inserted into the second guide hole.

7 . The dehumidifier of claim 2 , wherein the valve further comprises an O-ring disposed on each of the first blocking portion and the second blocking portion.

8 . The dehumidifier of claim 2 , further comprising a fixing member configured to selectively restrain the opening/closing plate in a first position and a second position based on the first bracket and the second bracket selectively blocking the first communication hole and the second communication hole, respectively, according to a deformation of the opening/closing plate.

9 . The dehumidifier of claim 8 , wherein the fixing member comprises:

a first bolt disposed in the dust cover;

a second bolt disposed in the absorbent cover; and

a first magnetic body disposed on the first bolt; and

a second magnetic body disposed on the second bolt, and configured such that the opening/closing plate is selectively attached the first magnetic body and the second magnetic body.

10 . The dehumidifier of claim 2 , wherein a first end of the opening/closing plate is fixed between the dust cover and the absorbent cover, and

wherein a second end of the opening/closing plate is a free end that is inserted between the first bracket and the second bracket.

11 . The dehumidifier of claim 10 , wherein the valve is configured such that, based on the inside of the dust cover being below a first temperature, the opening/closing plate of the valve is deformed to the first shape, and

wherein depending on a deformation of the opening/closing plate, the first bracket and the second bracket move by the second end of the opening/closing plate so that the first blocking portion of the first bracket blocks the first communication hole, and so that the second blocking portion of the second bracket opens the second communication hole.

12 . The dehumidifier of claim 11 , wherein the first shape is a state in which the second end of the opening/closing plate is deformed to move the first bracket and the second bracket toward the first communication hole.

13 . The dehumidifier of claim 10 , wherein the valve is configured such that, based on the inside of the dust cover being higher than a first temperature, the opening/closing plate of the valve is deformed to the second shape, and

wherein depending on a deformation of the opening/closing plate, the first bracket and the second bracket move by the second end of the opening/closing plate so that the first blocking portion of the first bracket opens the first communication hole, and so that the second blocking portion of the second bracket blocks the second communication hole.

14 . The dehumidifier of claim 13 , wherein the second shape is a state in which the second end of the opening/closing plate is deformed to move the first bracket and the second bracket toward the second communication hole.

15 . The dehumidifier of claim 2 , wherein both ends of the opening/closing plate are restrained ends that are restrained between the dust cover and the absorbent cover, and

wherein a central portion of the opening/closing plate is a bendable portion that is inserted between the first bracket and the second bracket.

16 . The dehumidifier of claim 15 , wherein the valve is configured such that, based on the inside of the dust cover being below a first temperature, the opening/closing plate of the valve is deformed to the first shape, and

wherein depending on a deformation of the opening/closing plate, the first bracket and the second bracket move by the central portion of the opening/closing plate so that the first blocking portion of the first bracket blocks the first communication hole, and so that the second blocking portion of the second bracket opens the second communication hole.

17 . The dehumidifier of claim 15 , wherein the valve is configured such that, based on the inside of the dust cover being higher than a first temperature, the opening/closing plate of the valve is deformed into the second shape, and

wherein depending on a deformation of the opening/closing plate, the first bracket and the second bracket move by the central portion of the opening/closing plate so that the first blocking portion of the first bracket opens the first communication hole, and so that the second blocking portion of the second bracket blocks the second communication hole.

18 . The dehumidifier of claim 1 , further comprising a membrane disposed at the first communication hole to prevent a moisture from the outside of the dust cover from flowing into the inside of the dust cover.

19 . A lamp for a vehicle comprising:

a lamp housing;

a light source module within the lamp housing; and

a dehumidifier attached to the lamp housing, wherein the dehumidifier comprises:

a dust cover including a first communication hole therein,

a desiccant,

an absorbent cover coupled to the dust cover, wherein the desiccant is accommodated between the dust cover and the absorbent cover, wherein the absorbent cover includes a second communication hole therein, and wherein the second communication hole corresponds to the first communication hole, and

a valve comprising:

a first bracket,

a second bracket coupled to the first bracket, and

a shape memory alloy disposed between the first bracket and the second bracket such that the valve is configured to selectively block the first communication hole and the second communication hole using the first bracket and the second bracket, respectively, by the first bracket and the second bracket being moved by the shape memory alloy being deformed by a temperature difference between an inside of the dust cover and an outside of the dust cover.

20 . The lamp of claim 19 , wherein the valve comprises an opening/closing plate including the shape memory alloy and configured to be deformed into a first shape and a second shape according to a temperature change in the dust cover, thereby causing the first bracket and the second bracket to reciprocally move in a first direction;

wherein the first bracket is disposed on a first side of the opening/closing plate and wherein the first bracket includes at least one first blocking portion corresponding to the first communication hole; and

wherein the second bracket is disposed on a second side of the opening/closing plate and wherein the second bracket includes at least one second blocking portion corresponding to the second communication hole.