Abstract: A pressure valve used in a cleaning apparatus. The pressure valve is provided between a pump motor and a cleaning injector. The pressure valve includes a valve body, a floating valve rod, a ball valve, a compression spring, and an adjusting screw. The valve body is connected to the water supply system via pipings (A, B, C) so that starting and shutting off of the cleaning injector can alter the water pressures in the individual chambers of the valve body, which then causes the opening and closing of the ball valve. Due to the changes in the water pressure within the chambers of the pressure valve, a floating valve rod within the pressure valve will press against a micro switch to control the starting or shutting off of the pumping motor.

Abstract: An electric fan including a stepped cylindrical housing covered with an air output cap, a motor fastened to a mounting ring inside the housing, a locating ring mounted inside the housing and holding an axle bearing, an axle bearing revolvably supported on the axle bearing and turned with the motor shaft of the motor, and three fan blade wheel assemblies mounted on the axle inside the housing, each fan blade wheel assembly having a fan blade wheel fixedly mounted around the axle and a hood with a center hole fixedly mounted inside the housing and covered over the fan blade wheel.