Patent ID: 7633250
Filing Date: 2009-12-15
Classification: F04D,H05K,Y02B

Abstract:
1. A fan comprising: a fan blade; a fan motor to rotate the fan blade; a rotational state outputting signal line to transmit a rotational state of the fan motor and data about the fan; a motor control section to control the rotational speeds of the fan motor and to output a signal representing the rotational state of the fan motor; a power supply state monitoring section to monitor a power supply state of the fan and to output a signal representing the power supply state of the fan; a data storage section to store the data about the fan in a non-volatile manner; and a data output section to determine, based on the signal output from the power supply state monitoring section and the signal output from the motor control section, whether to transmit the data stored in the data storage section via the rotational state outputting signal line, to transmit the signal indicating the rotational state of the fan motor via the rotational state outputting signal line, or to write data input into the data output section via the rotational state outputting signal line to the data storage section.