JP4375218B2 - Power converter cooling and soundproof structure - Google Patents

Description

  The present invention relates to a cooling and soundproof structure for a power converter.

  In Patent Document 1, a control unit is provided below each power supply unit having a cooling fan, the exhaust side of the control unit and the suction side of each power supply unit are on the same side, and the cooling fan of each power supply unit is used. Thus, a power supply device for forcibly cooling the control unit is shown. In Patent Document 2, an electronic component is attached to the outer periphery of a cylindrical heat sink having an upward air guide portion provided inside, and the electronic component is cooled by cooling air discharged through the heat sink and discharged to the outside. The board is shown. Further, in Patent Document 3, a heat sink is provided in close contact with the power conversion switching element, and air warmed by the heat sink is discharged outside the case by a blower through the wind tunnel, and warm air passing outside the wind tunnel is sent to the wind tunnel. A forced cooling device for an inverter device is shown in which the air is discharged from the provided opening to the outside through a wind tunnel.

  In Patent Document 4, a plurality of radiating fins attached to a heat receiving plate are arranged in series in the wind tunnel, and a semiconductor element is attached to the opposite surface of the heat radiating fin of the heat receiving plate, and the shape of the wind tunnel is changed from the leeward side to the leeward side. FIG. 2 shows a cooling device for a power converter having a gradually narrowed shape. Further, in Patent Document 5, a plurality of submodules are mounted on a mother board in a rack, and the submodules are covered with a duct and provided with an intake fan, an exhaust fan, and an exhaust duct, which are common to each exhaust duct. An electronic circuit forced air cooling apparatus is shown in which each intake port of the exhaust duct is connected, and each intake port is provided with an exhaust duct fan.

  Moreover, as a cooling device of a power converter, there is also one shown in FIG. In the figure, reference numeral 1 denotes a board body of the power converter, and a door 2 is provided on the front surface of the board body 1 so as to be freely opened and closed. In the panel main body 1, a mounting frame 3 is provided in the vertical direction at the rear, and a plurality of inverter units 4 that perform power conversion in the vertical direction are provided on the front surface of the mounting frame 3. On the rear side of the mounting frame 3 in the panel main body 1, connection portions 5 of the respective inverter portions 4 are disposed. A ventilation fan 6 is provided at the top of the panel body 1. Each inverter unit 4 is provided with a cooling fan 7 and cooling fins 8. In addition, a protective cover 9 is provided on the front side of each inverter unit 4, and each intake port 9 a is provided in the protective cover 9 at a position corresponding to each inverter unit 4, and also at the middle height of the door 2. An intake port 2a is provided.

In the above configuration, the ventilation fan 6 and each cooling fan 7 are driven, and the cooling air is sucked from the air inlet 2a of the door 2 as shown by the arrow 10, and is sucked from each air inlet 9a of the protective cover 9, Each cooling fin 8 passes through each cooling fan 7. Each cooling fin 8 absorbs the heat of the semiconductor element of each inverter unit 4 and the temperature rises. The cooling air cools each cooling fin 8 and the temperature rises. 1 is raised and exhausted through the ventilation fan 6 to the outside.
Japanese Utility Model Publication No. 56-66110 Japanese Patent Laid-Open No. 10-23618 JP-A-11-341824 JP 2001-25254 A JP 2001-196777 A

  The cooling device for the conventional power conversion device shown in FIG. 2 requires each cooling fan 7 and ventilation fan 6 provided in each inverter unit 4, and the structure becomes complicated and expensive. In addition, in order to increase the capacity of the device, a large number of inverter units 4 are required, and the structure becomes complicated. Further, since the cooling fan 7 and the cooling fin 8 are paired, the cooling air easily flows through each cooling fin 8, but the cooling air hardly flows through the other portions, and a sufficient cooling effect cannot be obtained. It was. Further, since the intake port 9a is provided in the portion corresponding to each cooling fan 7 of the protective cover 9, and the intake port 2a is provided in the middle portion of the door 2, the noise generated from the cooling fins 15 and 16 and the wind tunnel 11 is generated. Leaked to the outside from these inlets 2a, 9a, and the noise was loud.

  The present invention has been made to solve the above-described problems, and provides a cooling and soundproofing structure for a power conversion device that is simple and inexpensive in structure and can enhance the cooling effect and noise prevention effect. With the goal.

The cooling and soundproofing structure of the power conversion device according to claim 1 of the present invention is formed up to the upper end in the panel body on the rear side in the panel body, and a wind tunnel in which ventilation holes are formed in the upper part and the lower part on the front side; A ventilation fan provided at the upper end of the wind tunnel, a large capacity inverter unit mounted on the front side of the wind tunnel, a cooling fin integrally provided with the large capacity inverter unit on the front side of the upper and lower portions of the wind tunnel, provided on the front side of the capacitor inverter section, the cooling of the power conversion device provided with the uppermost upper and protective cover bottom to the intake port is provided, and opening and closing freely is provided et the door on the front of the panel body, and In soundproof structure ,
The door is provided with an intake port at a middle height position shifted downward with respect to the uppermost intake port of the protective cover and upward with respect to the lowermost intake port .

  As described above, according to the present invention, the wind tunnel is provided on the back side of the large-capacity inverter unit, and the ventilation fan is provided at the upper end of the wind tunnel, so there is no need to provide individual cooling fans in the plurality of inverter units. Since the cooling fins are provided on the front side of the upper and lower parts of the wind tunnel, the entire panel can be configured as a large-capacity inverter unit with low wiring inductance, and there is no need to provide a plurality of small-capacity inverter units. Can be made inexpensive.

  In addition, cooling fins with large pressure loss integrated with the large capacity inverter unit are provided on the front side of the upper and lower parts of the wind tunnel, so the difference in pressure loss due to the difference in distance to the ventilation fan in the wind tunnel can be reduced. Since the upper and lower cooling inside the panel can be made uniform, and the air inlets are provided at the top and bottom of the protective cover, the cooling air flows from this position to the center of the large-capacity inverter unit, except for the cooling fins. These heating members are also effectively cooled, and the cooling effect can be improved by these.

  In addition, the air intake of the door is provided at the middle height of the door and the air intake of the protective cover is provided at the uppermost and lowermost positions, so the position of the air intake is misaligned and noise generated in the cooling fins and wind tunnel Is difficult to leak to the outside.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal side view of a cooling and soundproof structure of a power converter according to the best mode of the present invention. A wind tunnel 11 is formed on the rear side of the panel body 1 up to the upper end of the panel body 1. A ventilation fan 12 is provided at the upper end. Each member constituting the large-capacity inverter unit 14 is attached to the front side of the wind tunnel 11 via the attachment portion 13, and the cooling fins are also attached to the upper and lower front sides of the wind tunnel 11 via the attachment portion 13. 15 and 16 are attached, and vent holes 11 a and 11 b are formed slightly above the cooling fin 15 on the front side of the wind tunnel 11 and slightly below the cooling fin 16. The cooling fins 15 and 16 are provided integrally with members constituting the large-capacity inverter unit 14 and absorb the heat generated therein. Further, on the front side of the large-capacity inverter unit 14, a protective cover 17 having intake ports 17 a and 17 b provided at the uppermost part and the lowermost part is provided.

  In the above configuration, when the ventilation fan 12 is driven, the cooling air is sucked into the panel body 1 from the air inlet 2a provided at the middle height of the door 2 as shown by the arrow 10, and the uppermost part of the protective cover 17 And through the intake ports 17a and 17b provided at the lowermost part, as shown by arrows 18 and 19, through the central portion which is a thin portion of each member constituting the large capacity inverter section 14, the large capacity inverter section 14 After cooling the component members and the cooling fins 15 and 16 that have absorbed the heat, the heated cooling air passes through the upper and lower vents 11a and 11b of the wind tunnel 11 as shown by arrows 20 and 21, and rises in the wind tunnel 11. Then, it is discharged to the outside through the ventilation fan 12.

  In the above-described best embodiment, since the wind tunnel 11 is arranged on the back side of the large capacity inverter section 14, it is only necessary to provide the ventilation fan 12 at the upper end of the wind tunnel 11, and to provide cooling fans individually to the plurality of inverter sections. Since the cooling fins 15 and 16 are disposed on the upper and lower portions of the front side of the wind tunnel 11, the entire panel can be configured as a large-capacity inverter unit 14 with a small wiring inductance, and a small-capacity inverter unit is provided. There is no need to provide more than one. For this reason, the structure is simple and can be made inexpensive.

  Further, since the cooling air passes through the cooling fins 15 and 16 having large pressure loss provided at the upper part and the lower part of the wind tunnel 11, the difference in pressure loss due to the difference in the distance to the ventilation fan 12 in the wind tunnel 11 is reduced. Inner and lower cooling can be made uniform, and intake ports 17a and 17b are provided at the uppermost and lowermost portions of the protective cover 17, and the cooling air flows from this position to the central portion of the large capacity inverter section 14. The heat generating members other than the cooling fins 15 and 16 can also be effectively cooled, and the cooling effect can be improved.

  Further, the air inlet 2a of the door 2 is provided at a middle height position, and the air inlets 17a and 17b of the protective cover 17 are provided at the uppermost part and the lowermost part. Thus, the positions of the air inlets 2a, 17a and 17b are provided. Therefore, the noise generated in the cooling fins 15 and 16 and the wind tunnel 11 is difficult to leak to the outside, and the noise can be reduced.

It is a vertical side view of the cooling and soundproofing structure of the power converter according to the best embodiment of the present invention. It is a vertical side view of the cooling device of the conventional power converter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Panel main body 2 ... Door 2a, 17a, 17b ... Air inlet 11 ... Wind tunnel 11a, 11b ... Air vent 12 ... Ventilation fan 14 ... Large capacity inverter part 15, 16 ... Cooling fin 17 ... Protective cover

Claims (1)

A wind tunnel that is formed on the rear side of the panel body up to the upper end of the panel body and vents are formed in the upper and lower parts of the front side, a ventilation fan installed at the upper end of the wind tunnel, and a front side of the wind tunnel Large capacity inverter unit, cooling fins integrated with the large capacity inverter unit on the front side of the upper and lower parts of the wind tunnel, and the front side of the large capacity inverter unit, with the inlets at the top and bottom feature a protective cover provided, and opening and closing freely is provided et the door on the front of the panel body, and
The door is provided with an intake port at a middle height position shifted downward with respect to the uppermost intake port of the protective cover and upward with respect to the lowermost intake port. The cooling and soundproofing structure of the power converter.

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