초록 ▼

The invention concerns an air blower including a centrifugal fan which is driven by an electric motor. The blower has a two-part blower housing comprising an upper housing which encloses the motor beneath the motor cap and a lower housing. The centrifugal fan is disposed in the chamber between the u

The invention concerns an air blower including a centrifugal fan which is driven by an electric motor. The blower has a two-part blower housing comprising an upper housing which encloses the motor beneath the motor cap and a lower housing. The centrifugal fan is disposed in the chamber between the upper and lower housings. The plenum around the fan leads to an outlet from the blower. An intake shield extends across and blocks undesired entrance of objects into the inlet opening in the bottom of the lower housing. The blower may be seated on a lid across an opening in it. An adapter in the lid receives the intake shield and has its own air inlet to the blower. The orientation of the blower with respect to the lid is rotatable. Cooperating flanges on the blower and the adapter hold the blower to the lid at two rotative locations and a button latch arrangement latches the blower at each of the two arrangements. Between the two latched orientations, the blower may be lifted free of the lid.

대표청구항 ▼

An air blower, comprising: an external housing, an air inlet into the housing, an air outlet from the housing, a motor in the housing, a centrifugal fan in the housing having a periphery and connected to be driven by the motor for drawing air into the housing inlet and for blowing air out the housin

An air blower, comprising: an external housing, an air inlet into the housing, an air outlet from the housing, a motor in the housing, a centrifugal fan in the housing having a periphery and connected to be driven by the motor for drawing air into the housing inlet and for blowing air out the housing outlet; a support located in the housing for supporting the motor and the support being shaped and so disposed in the housing for providing air separation between the motor and the fan; the housing including a chamber outside the periphery of the centrifugal fan and at the fan side of the support for the motor, and the chamber communicating with the outlet from the blower; the inlet to the housing including an inlet opening through which air is drawn into the housing and the fan being disposed near the inlet opening; an intake shield sealingly attached to the housing and extending past the inlet to the housing; where the intake shield extends past the inlet opening, the intake shield being spaced from the housing and from the housing inlet; and air passage means through the intake shield for enabling air to be drawn past the intake shield and into the housing inlet; said intake shield serving as an external surface of the housing shaped and disposed so that the entire blower may be sealed upon the intake shield external surface; the air passage means on the intake shield being generally off the intake shield external surface so as not to be blocked if the intake shield surface is against another or supporting surface; said external housing further including a blower housing having therein the air inlet and air outlet of the external housing; said blower housing comprising separate upper and lower portions which are held together, the lower portion being attached to the intake shield, and the support for the motor being part of the upper portion of the blower housing; each of said upper and lower portions of the blower housing having a first cooperating section, which cooperating sections constitute sidewall sections that are combined to define said air outlet; and each of said upper and lower portions of the blower housing having a second cooperating section, which second cooperating sections define a chamber wherein said fan is disposed.