An ionic air cleaner for homes and motor vehicles.

BACKGROUND OF THE INVENTION

The present invention relates to an ionic cleaner particularly designed for cleaning environ­ment air in homes and/or motor vehicles.

As is known, subjective comfort sensations are affected by the amount of negative or positive ions which are present in the environment.

In this connection, it should be pointed out that powerful negative ion natural sources con­sist of conifers and waterfalls which provide re­freshing sensations.

Based on this discovery, several negative ion generating devices have been designed which, at the start, have been used in laboratories and specialized clinics.

Domestic negative ion generating devices have been also devised for cleaning home and office air, and these domestic devices have been specific­ally improved in order to reduce the air particle contents.

In fact, as is known, industrial zone air is frequently polluted by motor vehicle discharge gases, furnace stack gases and the like, this air practically containing a large amount of noxius polluting particles such as carbon powders, lead powders and the like.

Another problem is that of the so-called "passive fume", that is the fume which is inhaled by no smoking persons, because of the presence of smoking persons.

Known ionizing devices substantially con­sist of apparatus able of generating a lot of nega­tive ions.

Commercially available ionic cleaner de­vices, however, have some drawbacks and, in parti­cular, they have a rather high cost and a low opera­ting efficiency; moreover, their maintenance requires skilled labour.

SUMMARY OF THE INVENTION

The main object of the present invention is to provide such an environment ionic cleaner device which, in addition to being very compact, and very efficient in generating ionic particles, is moreover adapted to be easily used both in a domestic environment, such as a home room, and, in particular, on a motor vehicle.

Another object of the present invention is to provide such an ionic cleaner device which is very simple construction-wise, does not require maintenance and can be easily assembled an installed, so as to generate a great amount of negative ions able to continuously refresh environment air, with a very reduced power consume.

Another object of the present invention is to provide such an ionic cleaner device which can be supplied by conventional electric power sources such as those available in homes and motor-­vehicles and which, moreover, has a very reduced making cost.

Yet another object of the present inven­tion is to provide such an envirnoment ionic cleaner device which comprises electrostatic means for re­covering air-entrained polluting particles.

According to one aspect of the present invention, the above mentioned objects, as well as yet other objects, which will become more apparent hereinafter, are achieved by an ionic air cleaner device, comprising a metallized plastics material film roll, the film of which can be torn away by the user so as to collect, periodically, dust parti­cles picked up by said metallized plastics material.

Such a result is obtained by means of the mentioned film roll or "coil" which operates as a dust collector, since said coil is positively charged thereby causing electrically charged parti­ cles to deposit by electrostatic attraction.

In fact, the subject device generates a high electrostatic field, adapted to convey negative charges on tip or point members so as to scatter them in the environment.

As mentioned, these negative charges are electrostatically attracted by the mentioned dust collector member.

It should be pointed out that this is the main feature of the present invention which provides the device according to the invention with the possi­bility of perfectly cleaning environment air at a low power consume and, accordingly, at a very low cost.

The constructional features of the men­tioned collector member are very advantageous since the collector member is made of a metallized plastics material adapted to be torn away by portions, which is able of generating a high electromagnetic field for picking up dust particles and the like, and which, moreover, can be easily removed without the need of using skilled labour.

Another advantageous feature of the inven­tion is that the cleaner device does not include any expensive cleaning filters which require periodic maintenance or replacement.

Thus, the above mentioned objects, as well as yet other objects, are achieved by an environment ionic cleaner device having the main features of Claim 1.

BRIEF DESCRIPTION OF THE DRAWINGS

Further characteristics and advantages of the ionic cleaner device according to the inven­tion, will become more apparent hereinafter from the following detailed description of two preferred embodiments thereof, which are illustrated, by way of an indicative but not limitative example, in the accompanying drawings, where: <ul id="ul0001" list-style="none"><li>Figure 1 is a partial schematic perspec­tive view of a first embodiment of the ionic cleaner device according to the invention;</li><li>Figure 2 illustrates operating elements included in the ionic cleaner device shown in Figure 1;</li><li>Figure 3 is a further perspective view illustrating a second preferred embodiment of the subject ionic cleaner device, provided with several types of plugs to be used for specific applications;</li><li>Figure 4 shows a schematic circuit diagram of a double generator adapted to generate a high ionizing static voltage, included in the subject ionic cleaner device.</li></ul>

DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to the Figures of the ac­companying drawings and, more specifically to Figures 1 and 2, the environment ionic cleaner device ac­cording to the invention has been herein indicated at the overall reference number 1.

In particular, this device which, in Figure 1, is shown by a bottom perspective view, comprises a bos-like housing 2, therewith there is directly associated a plug 3, for example a plug of the wall type, to be engaged in a corresponding socket of the type commonly available in homes.

The box-like body 2, of substantially cylindrical chape,has a bottom 4 and a side wall 5.

The bottom 4 is made of a plastics mate­rial, whereas the side walls 5 consist of a metalli­zed plastics material film and are coupled to a po­sitive polarity in order to cause the ions generated by the device to be discharged as it will become more apparent hereinafter.

More specifically, the side wall 5 consists of a conductive strip, or of a conductive ring mem­ber 6 which is shown in a more detailed way in Figure 2.

In this Figure there are also shown two types of plugs which can be associated with the subject device.

Inside the box-like housing 2 of the de­vice there is arranged a negative and positive high voltage generating circuit which, according to an advantageous feature of the invention, sub­stantially consists of a double generator or source, which will be disclosed in a more detailed way here­inafter.

This circuit has an output thereof, that is the negative output, coupled to at least a point assembly for generating ions, which point assembly is indicated at the reference number 7 in Figure 3, and comprises at least a point member P which, as is shown, is arranged at the paraboloid shaped top face of the housing 2.

In the embodiment shown in Figure 3, the subject device further comprises a power supply cord 8, one end of which is coupled to a convention­al plug 9 adapted to be supplied with either 12 V or 24 V dc power by the leighter installed on board of a motor vehicle. This plug can be replaced by con­ventional AC mains plugs.

Figure 3 also shows conventional means for affixing the cleaner device according to the invention at a suitable zone of a motor vehicle. of a room.

With reference to Figure 4, a circuit diagram is herein shown of a high static voltage double generator adapted to provide both a negative and a positive ionizing high voltage, which generator forms another important feature of the invention.

As is shown, this circuit comprises, sub­stantially, a transformer TSF 1, the primary winding of which is adapted to be coupled to the 220 VAC mains, as conventionally available in a home.

The secondary winding of the transformer TSF 1 power supplies a diode bridge the output of which is filtered through the capacitor C 1, which has one end coupled to ground and the other end thereof, or top end 10, coupled, in addition to the mentioned output of the diode bridge, to the cathode of a diode D 1, the anode of which is coupled to the (+) terminal of a 12 V dc power supply which, as stated, can be a conventional battery of a motor vehicle.

The cathode of the diode D 1 is moreover coupled, through a photodiode D 3 and two resistors R 3 and R 4, to the base electrode of a transistor TR, having its emitter electrode coupled to ground.

The collector electrode of the transistor TR is coupled to a winding of a further transformer TSF 2, of the central tap type; the other end of this winding is coupled, through the capacitor C 2, to the common junction point 11 of the resistors R 3 and R 4,

The collector electrode of the transistor TR is also coupled to the ground, through a diode D 2, which is coupled with the shown polarity; this collector electrode, moreover, is coupled, through a further capacitor C 3, to the central tap of the winding of the transformer TSF 2, to the anode of the photodiode D 3 and the cathode of the diode D 1.

The other winding, indicated at 12, of the transformer TSF 3 is coupled to a voltage multi­plier assembly overally indicated at the reference number 13; this assembly comprises, in a known way, a cell cascade, consisting of respective diodes and capacitors, each cell operating as a voltage doubling unit.

The positive output of the voltage multi­plying assembly 13 is taken through the resistor R 5, whereas the negative output, indicated at 14, is taken through the resistor R 6 and sent to the ionizing point P, which will generate ions based on the corona effect which is per se well known.

As stated, the (+) output will be coupled to the metal bottom 6 or the metallized film 5 held in the housing or casing of the cleaner device and will be also coupled to the side wall also made of a metal material: thus, the ions generated by the point P will be discharged on the positive voltage parts of the device, thereby efficiently cleaning air.

In particular, negative ions, generated by one or more points P will saturate environment air by moving with a high speed therethrough; as these negative ions encounter particles, said ions will adhere to the particles thereby negatively charging them and causing said particles to preci­pitate towards the positive electrical field formed by the bottom and the wall collector sheet of the casing or the device.

Thus, environment air will be perfectly cleaned.

Each new particle entering the action field of the device will be picked up by the collec­ tor 5 and removed from environment air.

In this connection it should be apparent that the ionic cleaner device according to the in­vention must be continuously held in an on condi­tion since the average life of negative ions is very short and, because of this reasons, these nega­tive ions must be continuously renewed.

From a prototype it has been found that, notwithstanding the provision of the double high static voltage generator, the electric power consume of the device is very small, of about 1 W for each device, this value being much less than the consume of known similar devices.

A single ionizing unit, from carried out test, has been found to be able of cleaning an air volume of about 5.17 m³.

For greater volumes, several units can be provided.

From the above disclosure it should be apparent that the invention fully achieves the in­tended objects.

While the invention has been disclosed with reference to preferred embodiments thereof, it should be apparent that the disclosed embodiments are susceptible to several modifications and varia­ tions all of which will come within the spirit and scope of the invention as defined in the accompany­ing Claims.