JPH0520387U - Forced air cooling system for electrical equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the dust filter from becoming clogged and improve safety. [Structure] An inlet part 7 and an outlet part 8 of air through which air passes are formed in an electric equipment casing 3, and a dust filter 5 is provided at the inlet part 7 and the outlet part 8, and the air flows from the inlet part 7 by forward rotation. Reversible fan 4 for introducing a fan into the housing
And a rotation direction control unit 2 that operates the drive unit 1 so as to rotate the fan 4 in the normal and reverse directions and to rotate the fan 4 in the reverse direction for a predetermined time after the power of the electric device is turned on and then to rotate the fan 4 in the normal direction. An air flow that is opposite to the air flow during the normal cooling from the outlet 8 to the inlet 7 is formed in the housing, and the air discharged from the inlet 7 removes the dust adhering to the dust filter 5 of the inlet 7 from the outside. Try to blow it away.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a forced air cooling device for an electric device for discharging heat generated inside the electric device to the outside.

[0002]

[Prior Art]

 Conventionally, the forced air cooling system for electric equipment has been equipped with a dust control filter such as urethane sponge and fine mesh to prevent dust from entering through the entrance provided on the housing of the electric equipment. The outside air was taken in, and this air was circulated to the internal heat generating part to absorb the amount of heat and then released to the outside from the outlet part.

[0003]

[Problems to be solved by the device]

 However, in this conventional forced air cooling system for electric equipment, the outside air is taken in from the outside of the electric equipment, the airflow is passed through the heat generating part, the heat quantity is absorbed, and then the airflow is discharged to the outside to create a unidirectional airflow. Since it can only be done for many years, the dust protection filter equipped at the inlet of the outside air intake may cause clogging due to the adhesion of dust, reducing the amount of intake of outside air and lowering the cooling efficiency. In this case, there is a problem that it may interfere with the normal operation of the equipment, and may cause smoke and fire.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a forced air cooling device for an electric device that prevents the dust filter from being clogged and improves safety. .

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the forced air cooling device for electric equipment of the present invention forms an air inlet part and an air outlet part through which air passes in an electric equipment casing, and provides a dust filter at the inlet part and the outlet part. A forward-reverse fan that introduces air from the inlet into the housing by forward rotation, a drive unit that rotates the fan forward and backward, and a rotation direction control unit that operates the drive unit to rotate the fan backward for a predetermined time are provided. It is as a configuration.

Then, if necessary, the rotation direction control unit is configured to have a function of operating the drive unit so that the fan is reversely rotated for a predetermined time after the power supply of the electric device is turned on and then the fan is normally rotated.

[0007]

[Action]

 According to the forced air cooling device for an electric device having the above configuration, the rotation direction control unit causes the fan to rotate in the reverse direction for a predetermined time via the drive unit. As a result, an air flow that is the reverse of the air flow during normal cooling from the outlet to the inlet is formed in the housing, so that the dust discharged from the inlet to the dust filter on the inlet is filtered by the air discharged from the inlet. It is blown outside.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a forced air cooling device according to an embodiment of the present invention.

In the figure, reference numeral 3 is an electric device housing in which a heat generating portion 6 such as an electric component is housed. The housing 3 is formed with an air inlet portion 7 and an air outlet portion 8 through which air passes. A dust protection filter 5 such as urethane sponge or fine mesh is provided at each of the inlet portion 7 and the outlet portion 8.

Reference numeral 4 denotes a fan that is provided on the rear side of the outlet portion 8 and is capable of forward and reverse rotation. This fan 4 introduces air into the housing 3 from the inlet portion 7 by forward rotation and discharges air from the inlet portion 7 by reverse rotation. Reference numeral 1 is a drive unit such as a motor for rotating the fan 4 in the normal and reverse directions.

Reference numeral 2 denotes a rotation direction control unit that operates the drive unit 1 so as to rotate the fan 4 in the reverse direction for a predetermined time after the power of the electric device is turned on, and drives the fan 4 in the normal direction after the predetermined time has elapsed. 1 is operated.

Therefore, according to the forced air cooling device of this embodiment, the rotation direction control unit 2 causes the fan 4 to rotate in the reverse direction via the drive unit 1 for a certain period of time immediately after the electric device is powered on. . As a result, an air flow opposite to the normal one is created, and the air is discharged from the inlet 7. Therefore, the dust adhering to the dust protection filter 5 is blown off by the exhaust air. After a lapse of a predetermined time, the fan 4 is rotated in the normal direction to generate a normal cooling air flow.

[0013]

[Effect of the device]

 As described above, according to the forced air-cooling device for electric equipment of the present invention, the control unit can rotate the fan in the reverse direction for a certain period of time to blow off the dust at the inlet, thus preventing clogging of the dust protection filter. This has the effect of preventing malfunctions due to clogging and improving safety.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a forced air cooling device for an electric device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive part 2 Rotation direction control part 3 Electric equipment housing 4 Fan 5 Dust protection filter 6 Heat generating part

Claims (2)

[Scope of utility model registration request] 1. An electric equipment casing is provided with an air inlet and an outlet through which air passes, dust filters are provided at the inlet and outlet, and air is introduced into the casing from the inlet by normal rotation. A forced air cooling device for an electric device, comprising: a reversible fan, a drive unit for reversing the fan in the normal direction, and a rotation direction control unit for activating the drive unit to reverse the fan for a predetermined time. 2. The rotation direction control unit has a function of operating the drive unit so that the fan is rotated in the reverse direction for a predetermined time after the power of the electric device is turned on, and then is rotated in the normal direction. Forced air cooling system for electrical equipment.