Electronic spray device improvements
AssigneeThe Technology Partnership PLC
InventorsRobert Gordon Maurice Selby, Daniel Crichton
Life of this patent
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Abstract
An electronic spray device comprising a spray generator and a spray controller for providing a drive signal to the spray generator, wherein the spray generator includes a perforate membrane which vibrates ultrasonically in response to the drive signal, said vibration causing liquid droplets to be ejected from one side of the perforate membrane, wherein the spray controller is adapted to modulate the drive signal sent to the spray generator, wherein such modulation of the drive signal is arranged to set the mean power level supplied to the spray generator to a target level.
Claims28
1-20. (canceled)
An electronic spray device comprising:
- a spray generator;
- and
- a spray controller for providing a drive signal to the spray generator;
- wherein the spray generator includes a perforate membrane which vibrates ultrasonically in response to the drive signal, said vibration causing liquid droplets to be ejected from one side of the perforate membrane;
- wherein the drive signal is time based modulated;
- wherein the liquid to air interface surface in the perforations is drawn back from the ejection side of the membrane during the time based modulation off periods.
A method of controlling the liquid air interface in the perforations of an electronic spray device having a spray generator;
- and a spray controller for providing a drive signal to the spray generator, wherein the spray generator includes a perforate membrane which vibrates ultrasonically in response to this drive signal, said vibration causing liquid droplets to be ejected from one side of the perforate membrane, the method comprising the step of:
- modulating the drive signal using time based modulation such that the liquid to air interface surface in the perforations is drawn back from the ejection side of the membrane during the time based modulation off periods.
An electronic spray device comprising:
- a spray generator;
- and
- a spray controller for providing a drive signal to the spray generator;
- wherein the spray generator includes a perforate membrane which vibrates ultrasonically in response to the drive signal, said vibration causing liquid droplets to be ejected from one side of the perforate membrane;
- wherein the spray controller is adapted to modulate the drive signal sent to the spray generator;
- wherein such modulation of the drive signal is arranged to set the mean power level supplied to the spray generator to a target level.
Dependencies are inferred from the claim text.