Title:
HEATING BLOWER
Document Type and Number:
Japanese Patent JP2014147547
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a heating blower which is safe and has good energy efficiency.SOLUTION: When a motor is in the abnormal condition such as when a foreign matter adheres to a fan, so that the motor is not operated, when the rotational frequency is lowered due to a great load, and when a circuit near the motor is disconnected, an interlocking mechanism is operated. That is, in such an abnormal condition, the voltage drops at both ends of a motor M. When the voltage drops under 3.3 volts, a current does not flow through a Zener diode ZD. Whereupon, a current does not flow also through a photo-coupler transmission part PT1, so that a light emitting diode does not emit light, and a photo-coupler receiving part PT2 causes no continuity. Thus, a power supply 9 is intercepted, so that a heater temperature control circuit HC is not operated. As a result, power is not supplied to a heater 7.
Inventors:
YUASA YUICHI
Application Number:
JP2013018154A
Publication Date:
August 21, 2014
Filing Date:
February 01, 2013
Export Citation:
Assignee:
RYOBI LTD
International Classes:
A45D20/10
Domestic Patent References:
| JPH09120763A | 1997-05-06 | |||
| JP2012110584A | 2012-06-14 |