The present invention is directed to an ultrasonic repellent humidifier for dispersing insect repellant into the air as a micro fine repellent vapor. A repellent tank provides rhodinol and cedarwood oil based repellent to a repellent well. An ultrasonic transducer is positioned in the well beneath t
The present invention is directed to an ultrasonic repellent humidifier for dispersing insect repellant into the air as a micro fine repellent vapor. A repellent tank provides rhodinol and cedarwood oil based repellent to a repellent well. An ultrasonic transducer is positioned in the well beneath the level of the repellent. It vibrates, forming a repellant vapor that is drawn into a vapor duct by a forced air system and out of the unit, dispersing the repellent vapor into the surrounding air. The vibrating portion of the ultrasonic transducer that is exposed to the oil-based repellent is a ceramic material that inhibits residue from forming on the transducer that reduces its efficiency. The ceramic material may be formed on the metal case of the transducer or on the piezoelectric oscillation crystal, or it may be a separately replaceable disc.
대표청구항▼
What is claimed is: 1. An ultrasonic repellent humidifier for dispersing insect repellant into the air as a micro fine repellent vapor, comprising: a repellent tank having an interior tank volume for holding repellent; a repellent well disposed substantially below said repellent tank and having an
What is claimed is: 1. An ultrasonic repellent humidifier for dispersing insect repellant into the air as a micro fine repellent vapor, comprising: a repellent tank having an interior tank volume for holding repellent; a repellent well disposed substantially below said repellent tank and having an interior well volume for holding repellent, said repellent well further comprising a sump defined as a lowermost portion of the interior well volume for accumulating repellent; a repellent tank valve for metering repellent from the repellent tank to the repellent well; a well fluid level assembly for tracking a level of repellent in the repellent well and actuating the repellent tank valve to replenish the level of repellent in the repellent well when the level of repellent drops below a predetermined level; a tank fluid level assembly for tracking a level of repellent in the repellent tank; a tank level switch mechanically coupled to the tank fluid level assembly and signaling the electronic controller when the fluid level in the repellent tank drops below a predetermined level; an ultrasonic transducer for pulverizing repellent into a micro fine repellent vapor, said ultrasonic transducer coupled to the repellent well the ultrasonic transducer comprising: an electro-mechanical converter; a ceramic vibrating surface disposed between the electro-mechanical converter and the interior well volume of the repellent well and substantially above the sump; and a seal disposed between the ultrasonic transducer and the repellent well; a blower for generating an air stream, said blower comprising: an impeller; a blower motor; and an electronic controller for controlling the ultrasonic transducer and the blower. 2. The ultrasonic repellent humidifier recited in claim 1, wherein the electronic controller further comprises a countdown timer for deactivating one of the ultrasonic transducer and the blower in a predetermined time period after activation. 3. The ultrasonic repellent humidifier recited in claim 2, wherein the repellent comprises one of geraniol and cedarwood oil. 4. The ultrasonic repellent humidifier recited in claim 1 further comprises: a repellent. 5. The ultrasonic repellent humidifier recited in claim 1, further comprises: a transformer; and an AC power connection. 6. The ultrasonic repellent humidifier recited in claim 5, further comprises: a nebulizer compartment for holding at least a portion of the ultrasonic transducer and the blower. 7. The ultrasonic repellent humidifier recited in claim 6, wherein the blower further comprises: an impeller shroud surrounding the impeller and having an inlet and an outlet for directing an air stream into the nebulizer compartment and toward the repellent well. 8. The ultrasonic repellent humidifier recited in claim 7, wherein said blower motor further comprising: a movable outlet cover for covering the outlet in absence of the air stream. 9. The ultrasonic repellent humidifier recited in claim 1, further comprises one of: a DC power connection; a battery; a rectifier; and a battery charger. 10. The ultrasonic repellent humidifier recited in claim 1, further comprises: a well fluid level sensor for sensing a predetermined repellent level in the repellent well and signaling the electronic controller in response to sensing the predetermined repellent level. 11. The ultrasonic repellent humidifier recited in claim 1, further comprises: a motion detector electrically coupled to the electronic controller for sensing movement proximate to the ultrasonic repellent humidifier and signaling the electronic controller in response to movement. 12. The ultrasonic repellent humidifier recited in claim 1, wherein the ceramic vibrating surface has an area greater than three inches squared. 13. The ultrasonic repellent humidifier recited in claim 1, wherein the ultrasonic transducer further comprises: a plurality of ultrasonic transducers for pulverizing repellent into a micro fine repellent vapor, said ultrasonic transducer assembly coupled to the repellent well at an opening of the repellent well, each of the plurality of ultrasonic transducers comprising: a respective electro mechanical converter; a respective ceramic vibrating surface disposed between the respective electro-mechanical converter and the interior well volume of the repellent well and substantially above the sump; and a respective seal disposed between the respective ultrasonic transducer and the repellent well. 14. The ultrasonic repellent humidifier recited in claim 13, wherein the electronic controller selectively activates one of the plurality of ultrasonic transducers at alternating run cycles. 15. The ultrasonic repellent humidifier recited in claim 1, wherein the interior volume of the repellent tank exceeds three hundred and fifty cubic inches. 16. The ultrasonic repellent humidifier recited in claim 1, wherein said sump extending beneath the ceramic vibrating surface of the ultrasonic transducer more than 0.5 inches. 17. The ultrasonic repellent humidifier recited in claim 1, wherein the ceramic vibrating surface is oriented off horizontal by more than four degrees. 18. The ultrasonic repellent humidifier recited in claim 1, wherein the electronic controller further comprises a cycle timer for cyclically activating one of the ultrasonic transducer and the blower for a first predetermined time period and deactivating the one of the ultrasonic transducer and the blower for a second predetermined time for at least two cycles. 19. The ultrasonic repellent humidifier recited in claim 1, the well fluid level assembly further comprising: a well float for tracking a level of repellent in the repellent well. 20. The ultrasonic repellent humidifier recited in claim 19, the well fluid level assembly further comprising: a well fluid level mechanical assembly coupled to the well float for translating a level of repellent indication from the well float to mechanical movement. 21. The ultrasonic repellent humidifier recited in claim 20, further comprising: the repellent tank valve metering repellent from the repellent tank to the repellent well in response to the mechanical movement from the well fluid level mechanical assembly. 22. The ultrasonic repellent humidifier recited in claim 1, further comprising: an external case surrounding at least the repellent well; and a vapor duct having a first opening proximate to the repellent well and a vent at a second end thereof which traverses the external case. 23. The ultrasonic repellent humidifier recited in claim 22, further comprising: a slotted inverted cone-shape diverter within the vapor duct for channeling micro particles of repellent away from sidewalls of the vapor duct and for collecting larger droplets of repellant and providing a path of relatively calm air in the vapor duct for returning the larger droplets to the repellant well. 24. The ultrasonic repellent humidifier recited in claim 1, further comprising: a base compartment surrounding an inner impeller inlet opening of said impeller of the blower for receiving clean air; a nebulizer compartment surrounding at least a portion of said repellent well, at least a portion of said ultrasonic transducer and an impeller outlet opening, for receiving the micro fine repellent vapor; an external case surrounding at least a portion of the nebulizer compartment and the base compartment; and a vapor duct having a first opening in the nebulizer compartment and a vent at a second end thereof which traverses the external case. 25. The ultrasonic repellent humidifier recited in claim 24, wherein the blower motor is disposed within the base compartment. 26. The ultrasonic repellent humidifier recited in claim 24, further comprises: a power transformer disposed within said base compartment. 27. The ultrasonic repellent humidifier recited in claim 1, further comprises: a transducer case for mechanically coupling the ultrasonic transducer proximate to said interior well volume of the repellent well. 28. The ultrasonic repellent humidifier recited in claim 27, wherein said seal being disposed between said transducer case and said interior well volume of the repellent well. 29. The ultrasonic repellent humidifier recited in claim 1, further comprising: a vibrating surface seal disposed between said ceramic vibrating surface and the interior well volume of the repellent well. 30. The ultrasonic repellent humidifier recited in claim 1, wherein said repellant well further comprises a transducer opening in the repellent well to the interior well volume of the repellent well, said ultrasonic repellent humidifier further comprising: a transducer case for mechanically coupling the ultrasonic transducer to the transducer opening of the repellant well. 31. The ultrasonic repellent humidifier recited in claim 30, wherein said seal being disposed between said transducer case and said interior well volume of the repellent well, said ultrasonic repellent humidifier further comprising: a vibrating surface seal disposed between said ceramic vibrating surface and said transducer case, thereby hydraulically isolating said electro-mechanical converter from the interior well volume of the repellent well. 32. The ultrasonic repellent humidifier recited in claim 1, wherein said blower motor further comprising: a dual speed blower motor, wherein said electronic controller operates said dual speed blower motor at a first speed at startup for a predetermined time and a second speed subsequent to the predetermined time, wherein the first speed is greater than said second speed. 33. The ultrasonic repellent humidifier recited in claim 1, wherein the impeller is a squirrel cage impeller, said blower further comprises: an impeller shroud surrounding the squirrel cage impeller and having an inlet and an outlet for directing the air stream toward the repellent well. 34. The ultrasonic repellent humidifier recited in claim 1, further comprises: a user interface electrically coupled to said electronic controller for providing user instructions to said electronic controller. 35. The ultrasonic repellent humidifier recited in claim 1, further comprises: a visual display for providing visual information on said ultrasonic repellent humidifier. 36. The ultrasonic repellent humidifier recited in claim 1, further comprises: a display for providing alpha-numeric information on said ultrasonic repellent humidifier.
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