Power conversion device

1 . A power conversion device comprising:

a housing having a space therein, and including a first opening and a second opening;

an electronic component being disposed in the space;

a duct having one end coupled to the first opening and other end coupled to the second opening, and having a flow path through which air flows and which is being partitioned from the space; and

a fan which is disposed at one end of the duct and which allows air to flow in the flow path,

wherein the electronic component includes a radiation fin being protruded from a side surface thereof,

wherein a coupling groove to which the radiation fin is coupled is disposed on a side surface of the duct,

wherein the radiation fin is provided in plural,

wherein the radiation fins have different lengths being protruded from the side surface of the electronic component, and

wherein the coupling groove has a plurality of bottom surfaces being disposed to have a step with each other so that the radiation fins are complementarily coupled to one another.

2 . The power conversion device according to claim 1 ,

wherein an accommodating groove accommodating the fan is disposed at one end of the duct.

3 . The power conversion device according to claim 1 ,

wherein on an upper surface of the duct, a plurality of first coupling portions being protruded upward and disposed to face each other with respect to a central groove is disposed, and wherein a printed circuit board being coupled to upper ends of the plurality of first coupling portions is included.

4 . The power conversion device according to claim 3 ,

wherein at least one element is disposed on a lower surface of the printed circuit board, and

wherein the element is disposed in the central groove.

5 . The power conversion device according to claim 4 ,

wherein a length of the element in an up and down direction corresponds to a length of the central groove in the up and down direction.

6 . The power conversion device according to claim 1 ,

wherein a separation part separating the duct from a bottom surface of the space is disposed at a lower portion of the duct.

7 . The power conversion device according to claim 1 ,

wherein the space is partitioned into a plurality of mutually symmetric regions with respect to the duct.

8 . The power conversion device according to claim 1 ,

wherein a fin being protruded inward from an inner surface of the duct is disposed in the flow path.

9 . The power conversion device according to claim 8 ,

wherein the flow path has a rectangular cross section,

wherein the fins are disposed in regions forming each side of the flow path, and

wherein a plurality of fins are provided with respect to a single side of the flow path so that a length of the fins being protruded from an inner surface of the duct is shortened as it travels closer to a corner of the flow path, and wherein the fins are disposed in regions forming each side of the flow path.

10 . The power conversion device according to claim 1 , wherein a length of the plurality of radiation fins protruding from the side surface of the electronic component becomes shorter as they are closer to an upper and lower ends of the electronic component.

11 . The power conversion device according to claim 1 , wherein the fan is disposed on an outer surface of the housing.

12 . The power conversion device according to claim 1 , wherein the housing has a rectangular cross-sectional shape, and

wherein the duct is disposed parallel to a long side of the housing.

13 . The power conversion device according to claim 1 , wherein the electronic component is provided in plurality and disposed along a longitudinal direction of the duct.

14 . The power conversion device according to claim 1 , comprising a third extension extending downward from a lower surface of the duct and a fourth extension extending outward from a lower end of the third extension,

wherein a lower surface of the duct is spaced apart from a bottom surface of the housing.

15 . A power conversion device comprising:

a housing having a space therein, and including a first opening and a second opening;

a duct having one end coupled to the first opening and other end coupled to the second opening, and having a flow path through which air flows and which is being partitioned from the space;

a printed circuit board disposed on the duct; and

an element disposed on the lower surface of the printed circuit board and facing the duct,

wherein a plurality of first coupling portions protruding upward and facing each other are disposed on an upper surface of the duct, and

wherein a central groove in which the element is disposed is formed between the plurality of first coupling portions.

16 . The power conversion device according to claim 15 , wherein a vertical length of the element corresponds to a vertical length of the center groove.

17 . The power conversion device according to claim 15 , wherein a fin being protruded inward from an inner surface of the duct is disposed in the flow path.

18 . The power conversion device according to claim 17 ,

wherein the flow path has a rectangular cross section,

wherein a plurality of fins are provided with respect to a single side of the flow path so that a length of the fins being protruded from an inner surface of the duct is shortened as it travels closer to a corner of the flow paths, and wherein the fins are disposed in regions forming each side of the flow path.