Abstract:
An option device for an electrical appliance of the invention is provided with a filter for purifying exhaust air from the electrical appliance, and an electric fan, wherein the air flow resistance in an external air inlet port formed independently of a suction port for sucking exhaust air from the electrical appliance is adjustable. According to this configuration, it is easy to secure balance between the exhaust air flow rate of the electrical appliance and the suction force by the electric fan without variably controlling the rotational speed of the electric fan.
Abstract:
An air flow sensor includes a case, a to-be-detected object, and a detector. The case includes an intake port and an exit port through which air is to flow. The to-be-detected object is located at a first position in the case when the air flowing from the intake port to the exit port has lower than a predetermined level of pressure, and is movable from the first position receiving the air when the air has equal to or higher than the predetermined level of pressure. The detector is disposed outside the case and is configured to detect a movement of the to-be-detected object and output an electrical signal.
Abstract:
A toner supply device includes a toner storage, a supply opening, a toner conveyer, a toner supply opening, and an air passage. The toner storage stores toner. Through the supply opening, the toner is supplied to a developing device. The toner conveyer includes an area of space different from an area of space of the toner storage. The toner conveyer conveys the toner stored in the toner storage to supply the toner from the supply opening to the developing device. Through the toner supply opening, the toner is supplied from the toner storage to the toner conveyer. The air passage is at a position different from the toner supply opening. The air passage connects the toner storage to the toner conveyer so as to allow air flowing through the supply opening into the toner conveyer to be supplied to the toner storage through the air passage.