Heat radiating apparatus and light illuminating apparatus with the same

1. A heat radiating apparatus that is placed in close contact with a heat source to radiate heat of the heat source in air, the heat radiating apparatus comprising:

a support member which has a shape of a plate, and is placed in close contact with the heat source on a first principal surface side;

a heat pipe which is supported by the support member, and is thermally joined with the support member to transfer the heat from the heat source; and

a plurality of heat radiating fins which is placed in a space that faces a second principal surface opposite to the first principal surface, and is thermally joined with the heat pipe to radiate the heat transferred by the heat pipe,

wherein the heat pipe comprises:

a first line part which is thermally joined with the support member;

a second line part which is thermally joined with the plurality of heat radiating fins; and

a plurality of connecting parts which each connect one end part of a respective first line part to one end part of a respective second line part such that the first line part and the second line part are successive, and protrudes from the support member in a direction in which the first line part extends,

the heat radiating apparatus includes a plurality of receiving parts, such that the heat radiating apparatus is connectable to an adjacent heat radiating apparatus to comprise a plurality of heat radiating apparatuses such that the first principal surfaces of the plurality of heat radiating apparatuses are successive, and

when the plurality of heat radiating apparatuses are connected in the direction in which the first line part extends, the receiving parts of the heat radiating apparatus receive the connecting parts of the adjacent heat radiating apparatus in a space that faces the second principal surface.

2. The heat radiating apparatus according to claim 1 , wherein the heat pipe is provided in multiple numbers, and

the first line parts of the plurality of heat pipes are placed at a first predetermined interval in a direction approximately orthogonal to the direction in which the first line parts extend.

3. The heat radiating apparatus according to claim 2 , wherein the second line parts of the plurality of heat pipes are approximately parallel to the second principal surface, and are placed at the first predetermined interval in the direction approximately orthogonal to the direction in which the first line parts extend.

4. The heat radiating apparatus according to claim 2 , wherein locations of the second line parts of each heat pipe differ in a direction approximately perpendicular to and a direction approximately parallel to the second principal surface, when viewed in the direction in which the first line parts extend.

5. The heat radiating apparatus according to claim 4 , wherein comprises a fan which is placed in the space that faces the second principal surface to generate an air current in a direction approximately parallel to the second principal surface.

6. The heat radiating apparatus according to claim 2 , wherein the first line part is inclined with respect to the second principal surface,

the connecting part protrudes in a direction facing away from the second principal surface, and

the receiving part is formed on a side opposite to the side from which the connecting part protrudes.

7. The heat radiating apparatus according to claim 6 , wherein the second line parts of the plurality of heat pipes are arranged at a second preset interval that is longer than the first preset interval in the direction approximately orthogonal to the direction in which the first line parts extend.

8. The heat radiating apparatus according to claim 1 , wherein the receiving part is formed between each heat pipe on a side opposite to a side from which the connecting part protrudes.

9. The heat radiating apparatus according to claim 1 , wherein each receiving part is formed between each heat pipe on a same side as a side from which the connecting part protrudes.

10. The heat radiating apparatus according to claim 1 , wherein comprises a fan which is placed in the space that faces the second principal surface to generate an air current in a direction approximately perpendicular to the second principal surface.

11. The heat radiating apparatus according to claim 1 , wherein the support member has at least one set of approximately parallel sides, and

the first line part extends along the sides of the support member.

12. The heat radiating apparatus according to claim 1 , wherein the support member has at least one set of approximately parallel sides, and

the first line part extends at a preset angle of inclination with respect to the sides of the support member.

13. The heat radiating apparatus according to claim 12 , wherein each receiving part is formed on a side opposite to a side from which the connecting part protrudes.

14. The heat radiating apparatus according to claim 12 , wherein comprises a fan which is placed in the space that faces the second principal surface to generate an air current in a direction approximately perpendicular to the second principal surface.

15. The heat radiating apparatus according to claim 1 , wherein the second line part is approximately parallel to the second principal surface.

16. The heat radiating apparatus according to claim 1 , wherein the support member has a groove part of a shape conforming to the first line part on the second principal surface side, and

the first line part is placed to be inserted into the groove part.

17. The heat radiating apparatus according to claim 1 , wherein the support member has a groove part of a shape conforming to the first line part on the first principal surface side, and

the first line part is placed to be inserted into the groove part.

18. A light illuminating apparatus comprising:

the heat radiating apparatus defined in claim 1 ;

a substrate placed in close contact with the first principal surface; and

a plurality of light emitting diode (LED) devices placed approximately parallel to the first line part of the heat pipe on a surface of the substrate.

19. The light illuminating apparatus according to claim 18 , wherein the plurality of LED devices is placed at a predetermined pitch in a direction in which the first line part extends, and

a distance from the other end of the first line part to one end of the support member in the direction in which the first line part extends is ½ or less of the pitch.

20. The light illuminating apparatus according to claim 18 , wherein the plurality of LED devices is placed in multiple rows in a direction approximately orthogonal to the direction in which the first line part extends.

21. The light illuminating apparatus according to claim 18 , wherein the plurality of LED devices is placed at a location opposite to the first line part with the substrate interposed between.

22. The light illuminating apparatus according to claim 18 , wherein the light illuminating apparatus comprises the plurality of heat radiating apparatuses connected such that the first principal surfaces are successive.

23. The light illuminating apparatus according to claim 22 , wherein the plurality of heat radiating apparatuses is arranged and connected in the direction in which the first line part extends.

24. The light illuminating apparatus according to claim 18 , wherein the LED device emits light of a wavelength that acts on an ultraviolet curable resin.