Brother Kogyo Kabushiki-Kaisha

Keisuke Manoh

Yoshiyuki Tsujimoto

Yuya Harada

Takuya Nagai

Masato Sueyasu

An image forming apparatus including: an image forming device provided in a housing; a fan to cool an interior of the housing; an AC/DC board; a first temperature detecting element configured to output a signal corresponding to a temperature in the housing; a second temperature detecting element configured to output a signal corresponding to a temperature of an element mounted on the AC/DC board; and a controller configured to control the fan when at least one of a first condition and a second condition is satisfied, the first condition being a condition in which a first detection temperature detected based on the signal received from the first temperature detecting element is not less than a first temperature threshold, the second condition being a condition in which a second detection temperature detected based on the signal received from the second temperature detecting element is not less than a second temperature threshold.

Image forming apparatus with controlable fan

A device includes a driving portion, a transformer having a primary winding and a secondary winding, the secondary winding generating an output voltage, the driving portion being connected across the secondary winding so that the output voltage is applied to the driving portion, a switching element connected in series to the primary winding, a first controller provided in a primary side of the transformer for controlling the switching element, and a second controller supplied with the output voltage. The second controller is configured to perform, during implementation of a burst switching control, transmitting a stop signal to the first controller when the output voltage exceeds a first voltage, and transmitting, after transmission of the stop signal, a resumption signal to the first controller when the output voltage falls below a second voltage lower than the first voltage. The first controller controls the switching element to stop performing switching operations in response to the stop signal, and further controls the switching element to resume performing the switching operations in response to the resumption signal.

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Iwakura, Japan

Keisuke Manoh