Title:
MOTOR FAN
Document Type and Number:
Japanese Patent JPH02100707
Kind Code:
A
Abstract:
PURPOSE:To apply a unit to be cooled which is low heating extent when the unit is used in a room where the ambient temperature is low and to save electric power by providing a fan, an input temperature detection part, a setting part, a rotation control part, and a motor electric power on/off switch. CONSTITUTION:A temperature value at which cooling is required by the motor fan A and a temperature value at which the cooling by the motor fan A is not necessary are set in a rotation start temperature value setting part 4 and a rotation stop temperature value setting part 3 in consideration of the environmental conditions, use conditions, heating conditions, etc., of the unit to be cooled. The heating temperature value of the unit B to be cooled is inputted to an input temperature detection part 1 through a temperature sensor interface line X. When the temperature value of the unit 3 which is cooled forcibly by the motor fan A decreases and a rotation detection part 2 detects the input temperature value decreasing below the set value of the rotation stop temperature value setting part 3, the fan 6 is powered off. Consequently, the unit B to be cooled is switched to natural air cooling.
Inventors:
ERI SATORU
Application Number:
JP25316488A
Publication Date:
April 12, 1990
Filing Date:
October 07, 1988
Export Citation:
Assignee:
NEC CORP
International Classes:
G05D23/00; H02P7/00; H02P29/00; (IPC1-7): G05D23/00; H02P7/00
Attorney, Agent or Firm:
Toshi Inoguchi