Recirculating type cleaner
First Claim
Patent Images
1. A recirculating type cleaner comprising:
- a housing containing a dust collecting chamber therein;
a dust collecting head connected to said housing;
a jet nozzle provided within said dust collecting head for discharging an air jet;
a fan positioned at one end of said dust collecting chamber for drawing air from the dust collecting chamber and sending out air as after-flow of said fan;
a suction tube connecting said dust collecting head with said dust collecting chamber;
a recirculating tube supplying the after-flow of said fan to said jet nozzle;
an exhaust opening for communicating the after-flow side of said fan to the exterior of the housing;
a branching means for dividing the after-flow into an exhaust flow to be sent out through said exhaust opening and a recirculating flow to be sent to said jet nozzle through said recirculating tube;
a mode selecting means for generating, in response to manual operation for the selection of one of a plurality of operation modes, a selection signal indicating the selected operation mode; and
control means connected to said mode selecting means for electrically controlling, in response to said selection signal, said branching means to vary the recirculation ratio in stepwise fashion to one of a plurality of predetermined recirculation ratios in accordance with the selected operation mode.
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Accused Products
Abstract
In a recirculating type cleaner, a jet nozzle is provided within a dust collecting head formed in the bottom face of the housing, the after-flow air from the suction fan is supplied through a recirculating tube to the jet nozzle. In the after-flow of the fan is provided a branch valve which is controlled by a controller to set the air recircuration ratio at a desired value suitable for any cleaning mode.
120 Citations
3 Claims
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1. A recirculating type cleaner comprising:
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a housing containing a dust collecting chamber therein; a dust collecting head connected to said housing; a jet nozzle provided within said dust collecting head for discharging an air jet; a fan positioned at one end of said dust collecting chamber for drawing air from the dust collecting chamber and sending out air as after-flow of said fan; a suction tube connecting said dust collecting head with said dust collecting chamber; a recirculating tube supplying the after-flow of said fan to said jet nozzle; an exhaust opening for communicating the after-flow side of said fan to the exterior of the housing; a branching means for dividing the after-flow into an exhaust flow to be sent out through said exhaust opening and a recirculating flow to be sent to said jet nozzle through said recirculating tube; a mode selecting means for generating, in response to manual operation for the selection of one of a plurality of operation modes, a selection signal indicating the selected operation mode; and control means connected to said mode selecting means for electrically controlling, in response to said selection signal, said branching means to vary the recirculation ratio in stepwise fashion to one of a plurality of predetermined recirculation ratios in accordance with the selected operation mode.
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2. A recirculating type cleaner comprising:
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a housing containing a dust collecting chamber therein; a dust collecting head connected to said housing; a jet nozzle provided within said dust collecting head for discharging an air jet; a fan positioned at one end of said dust collecting chamber for drawing air from the dust collecting chamber and sending out air as after-flow of said fan; a suction tube connecting said dust collecting head with said dust collecting chamber; a recirculating tube supplying the after-flow of said fan to said jet nozzle; an exhaust opening for communicating the after-flow side of said fan to the exterior of the housing; a branching means for dividing the after-flow into an exhaust flow to be sent out through said exhaust opening and a recirculating flow to be sent to said jet nozzle through said recirculating tube; a floor surface sensing means for detecting whether or not the distance between said dust collecting head and the floor surface is within a predetermined range and producing a detection signal representing the detection result; and control means connected to said floor surface sensing means and responsive to said detection signal for electrically setting said branching means to a lower one of a plurality of predetermined recirculation ratios to increase suction of the dust collecting head when said distance is greater than said predetermined range.
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3. A recirculating type cleaner comprising:
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a housing containing a dust collecting chamber therein; a dust collecting head connected to said housing; a jet nozzle provided within said dust collecting head for discharging an air jet; a fan positioned at one end of said dust collecting chamber for drawing air from the dust collecting chamber and sending out air as after-flow of said fan; a suction tube connecting said dust collecting head with said dust collecting chamber; a recirculating tube supplying the after-flow of said fan to said jet nozzle; an exhaust opening for communicating the after-flow side of said fan to the exterior of the housing; a branching means for dividing the after-flow into an exhaust flow to be sent out through said exhaust opening and a recirculating flow to be sent to said jet nozzle through said recirculating tube; a control means for electrically controlling the branching means to thereby vary the recirculation ratios between at least two ratios in accordance with mode of operation; and floor surface sensing means for detecting whether or not the distance between said dust collecting head and the floor surface is within a predetermined range and for providing a detection signal to said control means, said control means being operative in response to said detection signal to stop said fan and to render the dust collecting head inactive when the detection signal indicates that said distance is greater than the predetermined range.
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Specification