Ergonomically operating portable humidifier

[0001] In a dry room or car interior, it may require a humidifier for humidifying the air for comfortable living or driving. However, it is not available or it is difficult to obtain a portable mini humidifier from the commercial source.

[0002] Even a prior art of U.S. Pat. No. 4,085,893 disclosed an ultrasonic humidifier for atomizing water or other liquid, which however has the following drawbacks:

• [0003] 1. A water supply system including conduit or tube must be provided for supplying the water to be atomized by an ultrasonic vibrator, thereby causing a complex structure and unsuitable for portable uses.
• [0004] 2. There is no sensor provided for sensing the humidity in the air.
• [0005] 3. There is also no indicator showing the water content in a water supply system.

[0006] The present inventor has found the drawbacks of the prior art and invented the present portable humidifier.

[0007] The object of the present invention is to provide a portable humidifier comprising: a bottle for storing water therein, a capillary device immersed in the bottle for capillarily absorbing water as stored in the bottle, an ultrasonic vibrator mounted on an upper portion of the bottle for normally contacting a top wick portion of the capillary device and operatively vibrating for compressing the top wick portion for ejecting water mists upwardly outwardly through a plurality of perforations formed through the vibrator, a control device formed on a top cover of the bottle for controlling the on-off operation of the vibrator, a sensor formed on the top cover for sensing the surrounding humidity for reminding the user whether to actuate the control device for humidifying the surrounding, and a light indicator for illuminating and checking water stored in the bottle to remind whether to refill water into the bottle.

[0014] As shown in the drawing figures, the present invention comprises: a housing 1, a capillary means 2, an ultrasonic vibrator 3, a control means 4 adjacent to a rear side R of the housing 1, a sensor means 5 adjacent to a front side F of the housing 1, and a light indicator 6.

[0015] The housing 1 includes: a transparent bottle 11, a bottom holder 10 embedded on a bottom portion of the bottle 11, a covering plate 111 formed on an upper portion of the bottle 11 for closing the bottle 11 having an upper opening 112 formed through the covering plate 111 for refilling water into the bottle 11 and for inserting the capillary means 2 into the bottle 11 by passing through the opening 112, a side socket 110 formed in the bottle 11 for resiliently providing a coupler 13 in the socket 110 for coupling an upper casing 12 detachably engaged on an upper portion of the bottle 11, and a top cover 14 encapping the upper casing 12.

[0016] The capillary means 2 includes: a capillary tube 21 having its upper portion secured in the upper casing 12 of the housing 1 and protruding downwardly through a tube opening 121 formed through the upper casing 12 and through an upper opening 112 in the covering plate 111 to be inserted into the bottle 11; a wick member 22 longitudinally formed in the capillary tube 21 having a top wick portion 23 protruding upwardly from the capillary tube 21 to be contacted with the ultrasonic vibrator 3; a bottom plug 24 fixed on a bottom portion of the capillary tube 21 having a plurality of slots 241 formed in the plug 24 to be fluidically communicated with the wick member 22 disposed in the capillary tube 21; and a tension spring 25 retained in the lower portion of the capillary tube 21 and resiliently urging the wick member 22 upwardly to help a resilient contacting between the top wick portion 23 with the vibrator 3.

[0017] The capillary means 2 may be inclinedly secured in the housing 1 as shown in FIG. 2 to increase the length of capillary tube for absorbing much water therein. The wick member 22 may be further protected by a sleeve disposed around the wick member 22 which is made of water-absorbable material, such as cotton, foam, etc.

[0018] The ultrasonic vibrator 3 includes: a piezoelectric actuator 31 secured in the upper casing 12 and electrically connected to the control means 4; and a perforated vibrating blade 32 having a plurality of perforations 33 formed through the blade 32 and secured to the piezoelectric actuator 31, whereby upon switching-on of the control means 4 to actuate the piezoelectric actuator 31, the vibrating blade 32 will be vibrated to compress the top wick portion 23 having water absorbed therein to eject water mists upwardly outwardly through the perforations 33 in the blade 32 to be spread into the environment through a front opening 141 formed in the top cover 14.

[0019] Each perforation 33 formed in the vibrating blade 32 may have a diameter of 6˜9 microns, but not limited in the present invention.

[0020] The control means 4 includes: a button plate 41 pivotally secured in a rear portion of the top cover 14 by a pivot means 40 for normally shielding a rear opening 142 formed in the top cover 14, a front tooth 42 formed on a front portion of the button plate 41 to be engaged with a pair of bifurcated teeth 511 formed in a rear portion of the sensor means 5 for opening the sensor means 5, a switch button 43 resiliently formed on an electronic module 45 and having a button spring 44 disposed around the switch button 43 to normally urge a central bottom portion of the button plate 41 upwardly to be slightly separated from the switch button 43 (FIGS. 2 and 6) to keep normal-open of the switch button 43, and a power source adapter 46 adapted to be connected with an utility power supply and electrically connected to the electronic module 45, with the electronic module 45 secured in a rear portion of the upper casing 12.

[0021] The button plate 41 includes a bottom protrusion 411 preferably formed as an arcuate shape as shown in FIG. 5 for smoothly depressing the switch button 43 of the control means 4.

[0022] The sensor means 5 includes: a sensor plate 51 pivotally secured in a rear portion of the top cover 14 by a pivot 50 formed on a rear portion of the sensor plate 51 for normally shielding a front opening 141 of the top cover 14, a pair of bifurcated teeth 511 formed on a rearmost end portion of the sensor plate 51 to be engaged with the front tooth 42 of the button plate 41 of the control means 4, a humidity indicator 52 secured in an indicator recess 512 formed in the sensor plate 51 for indicating the humidity as sensed from the surrounding through a vent 531 formed in a cover sheet 53 (with the cover sheet 53 covering the humidity indicator 52 on the sensor plate 51); with the sensor plate 51 corresponding to the vibrating blade 32 of the ultrasonic vibrator 3 adjacent to the front side F of the housing 1; whereby upon depression on the button plate 41 of the control means 4, the front tooth 42 of the button plate 41 will downwardly bias the bifurcated teeth 511 to lift the sensor plate 51 from FIG. 6 to FIG. 5 to open the sensor plate 51 to allow the water mists as ejected by the ultrasonic vibrator 3 to be spread outwardly through the front opening 141 of the top cover 14 for humidifying the surrounding such as in a room or in a car. Simultaneously, the depression of the button plate 41 will downwardly depress the switch button 43 to actuate the ultrasonic vibrator 3 for ejecting the water mists upwardly.

[0023] The humidity indicator 52 may be a color-change indicator including cobalt chloride which will be changed from red color to blue color, indicating the change from a wet condition (red) to a dry condition (blue). When it shows a blue color, it indicates the environment is dry and the present invention may be actuated to spread water mists into the air for obtaining a suitable humidity.

[0024] The sensor plate 51 has its inside wall 54 formed with a plurality of guiding ribs 55 flared sidewardly from a longitudinal center of the inside wall 54 as shown in FIG. 4 for guiding the water mists as upwardly ejected from the ultrasonic vibrator 3 to be spread outwardly sidewardly for homogeneously dispersing the mists into the surrounding air for rapidly reaching a desired comfortable humidity.

[0025] The light indicator 6 includes: at least a lamp 61 such as a light-emitting diode (LED) mounted in a lower portion of the upper casing 12 for projecting light downwardly through a prism lens 62 formed in the covering plate 111 of the bottle 11 for illuminating the water stored in the bottle 11 for checking the water level L whether to refill water into the bottle or not.

[0026] The lamp 61 may be modified to be a plurality of LEDs with different colors and may be flashed as driven by a flashing circuit, not limited in the present invention.

[0027] Upon decoupling of the upper casing 12 from the bottle 11 by depressing the coupler 13 inwardly, the upper casing 12 and the elements implemented therein will be removed and the water may be re-filled into the bottle through the opening 112.

[0028] When depressing the button plate 41 of the control means 4 for starting the ultrasonic vibrator 3, the front tooth 42, as engaged with the bifurcated teeth 511 of the sensor plate 51, will be biased and lifted upwardly as shown in FIG. 5, a rear tooth 511r of the bifurcated teeth 511 will be frictionally engaged with the front tooth 42 to temporarily “lock” the front tooth 42 in position for continuously depressing the switch button 43 for actuating the vibrator 3 during the humidifying operation.

[0029] When it is intended to stop the humidification, the sensor plate 51 is lowered to close the opening 141 and the bifurcated teeth 511 will spur the front tooth 42 of the button plate 41 upwardly (from FIG. 5 to FIG. 6) to restore the button plate 41 to allow the button spring 44 to resiliently urge the protrusion 411 of the button plate 41 upwardly to be separated from the switch button 43, remaining a gap G between the button 43 and the button plate 41 and thereby deactivating the vibrator 3 to stop its vibrating operation.

[0030] The present invention is superior to the prior art with the following advantages:

• [0031] 1. The humidifier is a compact portable unit, being easily carried and conveniently used in a tiny space.
• [0032] 2. A sensor is provided for checking when to start the ultrasonic vibrator for operating the humidifier in a more scientific way.
• [0033] 3. Light indicator (LED) is provided for always checking the water level (L) in the bottle and also for projecting color light into water for enriching beautiful ornamental effect.
• [0034] 4. Guide means is provided for guiding the water mists from the vibrator to be homogeneously spread outwardly to the air for a more uniform humidity within the room or in a car.

[0035] The present invention may be modified without departing from the spirit and scope of the present invention.

[0036] The housing may also be further added therein with air-refreshing agent, deodorant or other hygienic agents.