Patent Application
20050160914
1. Field of the Invention
The present invention relates to air filters, more particularly to an improved air filter structure for filtering the impurities in the air of a room and filling the room with fragrance, which contains a plant liquid or an aromatic liquid in a container, and brings the molecules of the liquid to the room by the air circulation produced by a fan, and lets the air in the container touch the liquid surface, and thus can achieve the effect of filtering impurities. The air filter further has a sensor for automatically detecting a person who is approaching the range of the sensor to control and start the operation of a motor.
2. Description of the Related Art
A bad smell in a room with its windows and doors closed or inside a car usually makes us feel uncomfortable. Some airtight spaces are not equipped with ventilation facilities, so that the air inside is almost isolated completely from the outside without any ventilation and the smell is unable to disperse. Therefore, many people put an air freshener in the airtight space, and the aromatic molecules of the air freshener are spread into the air to achieve the effects of suppressing the smell and reducing the bad feeling of the smell.
However, a conventional air freshener generally disperses the molecules into the air by evaporation. The effect created by such evaporation method is slow and limited, and thus some manufacturers add wood extracts to air fresheners to improve the evaporation effect. These wood extracts have adverse effect on seriously jeopardizing our health. Further, although some air fresheners directly spray aromatic chemicals into the air by an accumulator (an air compressed can) or a fan, the spray cannot be circulated in the air continuously, and thus can have a temporary effect only.
The primary objective of the present invention is to provide an improved air filter structure that makes use of a container, a housing covering the container, a motor, a fan, and a stirring rod disposed at the bottom of the fan to give an air freshening effect. The air filter contains a plant liquid or an aromatic liquid in the container and the air outside the housing continues to circulate in and out of the container by the fan, so that the molecules of the liquid contained in the container are discharged and the room is filled with fragrance more quickly.
Further, a plurality of sensors is installed at appropriate positions of the housing, and the sensor is connected to a control switch, so that when someone is approaching the range of the sensor, the sensor turns on the control switch to start the motor and at the same time the stirring rod stirs the liquid to accelerate the dispersion of the molecules of the liquid. The air in the container touches the liquid surface, and the dust in the air adheres to the liquid surface and then sinks to the bottom of the container by gravitation, and thus achieving the effect of filtering impurities in the air.
Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, in which:
The improved air filter structure in accordance with the present invention as shown in
Further, refer to
While the fan 40 is driving the air circulation, the stirring rod 50 also rotates to stir the liquid L as the fan 40 rotates in order to improve the activity of the molecules of the liquid L. More particularly, the air entering into the container 10 from the outside of the housing 20 will touch the surface of the liquid L, so that the dust originally mixed in the air attaches on the surface of the liquid L, and the dust sinks to the bottom of the container 10 by gravitation, and thus achieving the effect of filtering impurities from the air.
Further, a plurality of sensors 60 is disposed at appropriated positions of the housing 20, and the sensor could be a photoelectric cell which emits an infrared ray to detect whether an object falls into the range of the sensor. The sensor is connected to a control switch, so that when someone is approaching the sensing range, the sensor turns on the control switch to start the motor. Please refer to
Of course, the air filter could be installed in a car as shown in
In summation of the description above, the “Improved air filter structure” of the invention aims at the improvement of the conventional air filter by adding a plurality of sensors at appropriate positions of the housing, so that the sensors detect an approaching human body to start the operation of the air filter, and filter the impurities in the air of the room, and fill the room with fragrance. The present invention herein enhances the performance than the conventional structure and further complies with the patent application requirements and is submitted to the Patent and Trademark Office for review and granting of the commensurate patent rights.
While the present invention has been described by the most practical and preferred embodiments, it is understood that this invention is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretations and equivalent arrangements.
