Recirculating type cleaner

  • US 5,613,269 A
  • Filed: 04/04/1995
  • Issued: 03/25/1997
  • Est. Priority Date: 10/26/1992
  • Status: Expired due to Fees
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First Claim
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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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