EP 0678271 B1 20001018 - Circuit for controlling the suction capacity of a vacuum cleaner
Title (en)
Circuit for controlling the suction capacity of a vacuum cleaner
Title (de)
Schaltungsanordnung zur Saugleistungsregelung eines Staubsaugers
Title (fr)
Circuit pour régler la puissance d'aspiration d'un aspirateur de poussière
Publication
Application
Priority
DE 4413976 A 19940421
Abstract (en)
[origin: EP0678271A2] The suction regulation uses a controlled semiconductor switch (2), in series with the vacuum cleaner fan motor (1) and an associated control circuit, containing a comparator (28) for comparing an adjustable control signal and periodically varying signal, to provide the control pulses for the semiconductor switch. The control signal for the control circuit is manually adjusted to a required value and/or is switched between 2 different values via a pressure switch (40), the comparator receiving the control signal pref provided by an operational amplifier, receiving a sawtooth voltage synchronised with the supply voltage for the fan motor at its second input. <IMAGE>
IPC 1-7
IPC 8 full level
A47L 9/28 (2006.01)
CPC (source: EP)
A47L 9/2842 (2013.01); A47L 9/2857 (2013.01)
Designated contracting state (EPC)
DE ES FR GB NL SE
DOCDB simple family (publication)
EP 0678271 A2 19951025; EP 0678271 A3 19980708; EP 0678271 B1 20001018; DE 59508787 D1 20001123; ES 2152997 T3 20010216
DOCDB simple family (application)
EP 95105303 A 19950407; DE 59508787 T 19950407; ES 95105303 T 19950407