JPH0718454U - Cooling system - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a compact, quiet, and efficient cooling device. [Structure] A rectangular cooling fin 2 having an air passage 4 formed in the axial direction and having both end surfaces as ventilation inlets / outlets 2a and 2b and peripheral side surfaces having an element mounting surface 5, and a ventilation inlet 2 for the cooling fins 2.
The fan 3 provided in a. [Effect] Since the width dimension can be suppressed, it can be stored in a relatively small box or the like. Moreover, the passage of air in the ventilation passage 4 is improved, and the heat generated in the inverter element 1 can be efficiently dissipated. Further, since up to four inverter elements 1 can be cooled at the same time without adding the fan 3 and the cooling fin 2, it is possible to suppress an increase in noise due to the addition of the fan 3 and the cooling fin 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cooling device for cooling a semiconductor device such as an inverter element.

[0002]

[Prior art]

 As shown in FIG. 3, the cooling device of the conventional example has a rectangular tubular cooling fin 12 in which a ventilation passage 14 is formed inside and the inverter element 1 is attached to one side surface 15, and one side surface 15 of the cooling fin 12. It was composed of a fan 13 provided at the bottom. When the fan 13 is driven, air is sucked from the lower part of the fan 13 as shown by an arrow C and discharged from a side part of the fan 13 as shown by an arrow D to reach the ventilation inlet 12a of the cooling fin 12. Further, it passes through the ventilation passage 14 of the cooling fin 12 and is exhausted upward from the ventilation outlet 12b as shown by an arrow E. The heat generated in the inverter element 1 is heat-exchanged by the cooling fin 12 and radiated to the outside from the ventilation outlet 2b together with the air passing through the ventilation passage 14.

[0003]

[Problems to be solved by the device]

 In the conventional cooling device, the air discharged from the side part of the fan 13 bends at a right angle as shown by the arrow D, so that the air does not pass through well and the heat generated in the inverter element 1 is efficiently radiated. I couldn't. Further, since the fan 13 is attached to the one side surface 15 of the cooling fin 12, a wide box body or the like is required to house the cooling fin 12 and the fan 13. Further, since the single inverter element 1 is cooled by the fan 13 and the cooling fin 12, a plurality of fans 13 and cooling fins 12 are required when using a plurality of inverter elements 1, and noise increases. The problem also occurred.

An object of the present invention is to provide a compact, quiet and efficient cooling device.

[0005]

[Means for Solving the Problems]

 The cooling device according to the first aspect comprises a cooling fin and a fan. The cooling fin is a rectangular tube that has a ventilation path formed in the axial direction and has both end surfaces as ventilation inlets and outlets and peripheral side surfaces as element mounting surfaces. The fan is provided at one of the ventilation inlets and outlets of the cooling fins.

According to another aspect of the cooling device of the present invention, a fan is further provided at the ventilation inlet of the cooling fin, and the fan is housed in the box with the fan down, and the ventilation outlet is exposed from the upper surface of the box. The air vent outlet is covered with a cover.

[0007]

[Action]

 According to the cooling device of the first aspect, since the fan is provided at one of the ventilation inlets and outlets of the rectangular tubular cooling fin having the ventilation passage formed in the axial direction, the width dimension can be suppressed. Moreover, the air discharged from the fan can be blown into the ventilation path from the axial direction of the cooling fins. Further, since the peripheral side surface is the element mounting surface, a plurality of inverter elements and the like can be mounted on a single cooling fin.

According to the cooling device of the second aspect, a fan is further provided at the ventilation inlet of the cooling fin, and the fan is housed in the box with the fan down, and the ventilation outlet is exposed from the upper surface of the box. It is possible to exhaust the air heated through the ventilation passages of the cooling fins directly from the ventilation outlet to the outside of the box. Further, since the exposed ventilation outlet is covered with a cover, it is possible to prevent foreign matter from entering the ventilation passage.

[0009]

【Example】

 As shown in FIG. 1, a cooling device according to a first embodiment of the present invention is a rectangular tube having an air passage 4 formed in the axial direction and having both end faces as air inlets / outlets 2a and 2b and peripheral side faces as an element mounting face 5. The cooling fin 2 and the fan 3 provided at the ventilation inlet 2a of the cooling fin 2.

The cooling fin 2 has four element mounting surfaces 5 and a plurality of air passages 4 formed therein. The fan 3 sucks air from the lower surface and discharges it to the upper surface. When the fan 3 is driven, air is sucked from the lower surface of the fan 3 and reaches the ventilation inlet 2a of the cooling fin 2 as shown by an arrow A. Further, after passing through the ventilation passage 4 of the cooling fin 2, as shown by an arrow B, the gas is exhausted upward from the ventilation outlet 2b.

As described above, since the width dimension can be suppressed by providing the fan 3 at the lower end of the cooling fin 2, the cooling fin 2 can be stored in a relatively small box body or the like. Moreover, since the air discharged from the fan 3 can be blown into the ventilation passage 4 from the axial direction of the cooling fins 2, the passage of the air in the ventilation passage 4 is improved, and the heat generated in the inverter element 1 is efficiently discharged. It can dissipate heat easily.

Further, since the element mounting surfaces 5 are formed on the four surfaces of the cooling fins 2, up to four inverter elements 1 can be cooled at the same time without adding the fan 3 and the cooling fins 2. Therefore, it is possible to suppress an increase in noise due to the addition of the fan 3 and the cooling fin 2. Although the planar shape of the cooling fin 2 is a quadrangle, it may be a polygon other than a quadrangle to increase or decrease the number of the element mounting surfaces 5.

Next, in the cooling device according to the second embodiment of the present invention, as shown in FIG. 2, a fan 3 is provided at the ventilation inlet 2a of the cooling fin 2 and the fan 3 is placed on the bottom of the box body 7. In addition to the storage, the ventilation outlet 2b is exposed from the upper surface of the box body 7, and the exposed ventilation outlet 2b is covered with a cover 6. The box body 7 has an upper end portion of the cooling fin 2 protruding upward from the upper surface opening 7a. The cover 6 is a box having an opening on the lower surface, and penetrates the inside of the cooling fin 2 near the ventilation outlet 2b. The air exhausted from the ventilation outlet 2b flows along the inner surface of the cover 6, and is exhausted to the outside from between the cooling fin 2 and the cover 6 as shown by an arrow B '.

According to the cooling device configured as described above, the air heated through the cooling fins 2 can be directly discharged to the outside of the box body 7, so that the heat generated by the inverter element 1 is stored in the box body 7. It can dissipate heat efficiently without storing. Further, the cover 6 can prevent foreign matter or the like from entering the exposed ventilation outlet 2b. Other configurations and effects are similar to those of the first embodiment.

[0015]

[Effect of device]

 According to the cooling device of the first aspect, since the fan is provided at one of the ventilation inlets and outlets of the rectangular tubular cooling fin having the ventilation passage formed in the axial direction, the width dimension is suppressed and the box body is relatively small. Can be stored in. Moreover, since the air discharged from the fan can be sent from the axial direction of the cooling fins into the ventilation path, the passage of air in the ventilation path is improved, and the heat generated in the inverter element etc. mounted on the element mounting surface is efficiently radiated can do. Further, since the peripheral side surface of the cooling fin is used as the element mounting surface, it is possible to mount a plurality of inverter elements and the like on a single cooling fin. Therefore, it is not necessary to add fans and cooling fins, and it is possible to suppress an increase in noise.

According to the cooling device of the second aspect, a fan is further provided at the ventilation inlet of the cooling fin, and the fan is stored in the box with the fan down, and the ventilation outlet is exposed from the upper surface of the box. Since the air heated through the cooling fin ventilation path can be directly exhausted from the ventilation outlet to the outside of the box, the heat generated by the inverter element etc. can be efficiently dissipated without being stored in the box. . In addition, the cover can prevent foreign matter or the like from entering the exposed ventilation openings.

[Brief description of drawings]

FIG. 1 is a perspective view of a cooling device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a cooling device according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a conventional cooling device.

[Explanation of symbols]

 2 Cooling fins 2a Vent inlet 2b Vent outlet 3 Fan 4 Vent path 5 Element mounting surface

Claims (2)

[Scope of utility model registration request] 1. A rectangular cylindrical cooling fin having an air passage formed in the axial direction and having both end surfaces as a ventilation inlet / outlet and a peripheral side surface as an element mounting surface, and a fan provided at one of the ventilation inlet / outlet openings of the cooling fin. Equipped cooling system. 2. A fan is provided at the ventilation inlet of the cooling fin,
The cooling device according to claim 1, wherein the fan is housed with the fan down and the ventilation outlet is exposed from the upper surface of the box, and the exposed ventilation outlet is covered with a cover.