Droplet mist generator
First Claim
1. Droplet mist generator for producing a droplet mist comprising:
- a pump chamber connected to a fluid reservoir and bounded by a casing wall;
a nozzle area constructed in the casing wall, said nozzle area having a plurality of nozzles;
a plate-shaped, piezoelectric flexural transducer positioned in the pump chamber and attached so that it forms an overhang and is bendable around a transverse axis that runs transversely to the direction of the overhang for alternatingly carrying out a displacement stroke, wherein fluid is driven towards the nozzles of the nozzle area and fluid droplets produced are ejected from the nozzles in the form of a droplet mist and a return stroke, whereby the piezoelectric flexural transducer is common to the plurality of the nozzles of the nozzle area;
side openings formed between lateral edges of the piezoelectric flexural transducer and a portion of the casing wall lying opposite to said lateral edges, and wherein a connection between the fluid reservoir and the pump chamber empties into the pump chamber at the side of the piezoelectric flexural transducer turned away from the nozzle area, and;
a control system by which the piezoelectric flexural transducer is controlled by voltage pulses for the displacement stroke, which occurs more quickly than the return stroke in which the fluid flows back through the side openings.
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Accused Products
Abstract
In a pump chamber connected to a liquid supply, an overlapping piezoelectric flexural transducer is disposed so that when voltage pulses are applied to produce an excursion, a number of droplets can be expelled from a nozzle array in the housing wall of the pump chamber using a plurality of nozzles. Gaps are formed between the edges lateral to the direction of overhang an the free end of the piezoelectric flexural transducer ad adjacent section of the housing wall. The nozzle array can be disposed in the projection of the plate surface of the piezoelectric flexural transducer in its direction of motion or in the extension of the piezoelectric flexural element or in another suitable pattern. As part of a combustion device the droplet mist generator is excellent for producing a combustible fuel-oxidant mixture.
104 Citations
16 Claims
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1. Droplet mist generator for producing a droplet mist comprising:
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a pump chamber connected to a fluid reservoir and bounded by a casing wall; a nozzle area constructed in the casing wall, said nozzle area having a plurality of nozzles; a plate-shaped, piezoelectric flexural transducer positioned in the pump chamber and attached so that it forms an overhang and is bendable around a transverse axis that runs transversely to the direction of the overhang for alternatingly carrying out a displacement stroke, wherein fluid is driven towards the nozzles of the nozzle area and fluid droplets produced are ejected from the nozzles in the form of a droplet mist and a return stroke, whereby the piezoelectric flexural transducer is common to the plurality of the nozzles of the nozzle area; side openings formed between lateral edges of the piezoelectric flexural transducer and a portion of the casing wall lying opposite to said lateral edges, and wherein a connection between the fluid reservoir and the pump chamber empties into the pump chamber at the side of the piezoelectric flexural transducer turned away from the nozzle area, and; a control system by which the piezoelectric flexural transducer is controlled by voltage pulses for the displacement stroke, which occurs more quickly than the return stroke in which the fluid flows back through the side openings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification