阅读说明：本技术 改进型电离粒子发生装置 (Improved generation ionized particle generating device ) 是由 P·吉托 于 2019-01-11 设计创作，主要内容包括：一种基于等离子体的电离粒子发生装置,具有放射面,在该放射面上设置有粒子发射器的至少一个喷嘴(E1..E9),该粒子发射器包括位于所述喷嘴延伸部中的护套、由导电材料制成的杆件,该杆件插入到所述护套中,杆件在喷嘴处具有尖端,该尖端具有一定电压,所述电压是由高压电路产生的,该装置还包括位于正面处的导电结构(20),该结构(20)包括导电材料制成的芯体和保护部件,该保护部件由弱导电材料或绝缘材料制成,部分覆盖所述芯体。(A plasma-based ionizing particle generating device having a radiating surface on which is arranged at least one nozzle (E1.. E9) of a particle emitter comprising a sheath in the extension of said nozzle, a rod made of an electrically conducting material inserted into said sheath, the rod having a tip at the nozzle with a voltage, said voltage being generated by a high voltage circuit, the device further comprising an electrically conducting structure (20) at the front surface, the structure (20) comprising a core made of an electrically conducting material and a protective member made of a weakly conducting or insulating material, partly covering said core.)

1. An ionized particle generating device based on plasma, which is provided with a radiation surface (3), at least one nozzle (30, E1.. E14) provided with a particle emitter on the emission surface, the particle emitter comprising a sheath (35) in the nozzle extension, a rod (38) made of an electrically conductive material, the rod being inserted into the sheath (35), the rod having a tip (39) at the nozzle, said tip having a voltage generated by a high voltage circuit (45), said device further comprising a conductive structure (20) at the front face (3), characterized in that said structure (20) comprises a core (200, 201) made of electrically conductive material and a protective member (21, 22, 23, 24) made of weakly electrically conductive or insulating material, partially covering said core.

2. The device according to claim 1, wherein the protective member is a sheath (21, 23) surrounding or enveloping the core.

3. The device according to claim 1, wherein the protective member is a protective strip (22) partially covering the core (200).

4. A device according to any one of claims 1 to 3, characterized in that the structure (20) is electrically connected to the earth (25) of the device.

5. The device according to any one of claims 1 to 4, characterized in that said structure (20) is provided in a recess formed on said front face (3).

Technical Field

The invention relates to a plasma-based ionized particle generating device having a radiation surface on which at least one nozzle of a particle emitter is arranged, which particle emitter is formed by a sheath with a first voltage in the extension of the nozzle and a rod made of an electrically conductive material, which rod is inserted into the sheath, which rod has a tip at the nozzle, which tip has a second polarity voltage, which voltage is generated by a high-voltage circuit.

Background

It is well known that the presence of ions, preferably negative ions, e.g. negativeOxygen ion (O)₂) And the air pollution is improved. In the usual urban living environment, such ion concentrations are often lower than those in the natural environment and in any case are not sufficient to improve air pollution significantly. To overcome this drawback, devices capable of artificially generating these negative ions have been designed and are currently on the market. For example, french patent document FR 2722923 describes a device that is capable of generating ions without generating measurable amounts of ozone or nitrogen oxides.

In this document, the generation of negative ions is achieved by generating a plasma by means of a high voltage tip. This known device, although powerful, does not guarantee a constant and stable generation of ions, and therefore does not allow repeatability of the performance of the device during its manufacture. In addition, it has been found that the device has a strong sensitivity to the material from which it is made.

For this reason, patent document WO 2017/093630 proposes an ionized particle generating apparatus that can generate ions using plasma more stably and more safely. To this end, the ionized particle generating apparatus includes a conductive structure on the front side of the apparatus. However, in use, as the conductive structure is adjacent to the tip of the rod of conductive material, leakage currents can develop between the tip and the structure. These leakage currents represent ion emission losses and therefore limit the performance of the device. On the other hand, they increase the local electron density in the plasma, resulting in higher ozone emission.

Disclosure of Invention

It is an object of the present invention to provide an ionized particle generating apparatus which does not have the above-mentioned drawbacks.

To this end, according to the invention, a plasma-based ionized particle generating device is proposed, having a radiation surface on which at least one nozzle of a particle emitter is arranged, which particle emitter comprises a sheath in the extension of said nozzle, a rod made of an electrically conductive material inserted into said sheath, the rod having a tip at the nozzle, which tip has a voltage, said voltage being generated by a high-voltage circuit, and an electrically conductive structure at the front surface, which structure comprises a core made of an electrically conductive material and a protective part made of a weakly electrically conductive material or an insulating material, partly covering said core.

Advantageously, but optionally, the ionized particle generating apparatus according to the invention has at least one of the following technical features:

-the protective member is a sheath surrounding or wrapping the core;

the protective member is a protective strip partially covering the core;

-the structure is electrically connected to the ground of the device;

-the structure is arranged in a recess formed on the front face.

Drawings

Additional features and advantages of the invention will be set forth in the description which follows of embodiments of the invention. In the figure:

figure 1 is a front three-dimensional view of the device according to the invention;

figure 2 is a side view of an ionizing particle emitter of the device according to the present invention;

figure 3 is a rear view of the front face of figure 1, showing a first configuration of the structure;

figure 4 is a front rear view, showing a second configuration of the structure;

fig. 5 shows a front modification of the device according to the invention;

FIG. 6 is a three-dimensional view of another embodiment of the device according to the invention;

figures 7 and 8 are detail views along VIl and VIII, showing the structure according to two embodiments;

fig. 9 to 11 are detail views of a modified embodiment of the embodiment of fig. 7 and 8.

For purposes of clarity, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Detailed Description

Referring to fig. 1, an ionized particle generating apparatus according to the present invention is denoted by reference numeral 1. The components of such an ionizing particle generating apparatus 1 according to the invention are placed in a housing comprising a radiation front 3, called ion generating surface. On the front face 3, different openings 5, 6, 7, 8, 9, 10, 11, 12, 13 are provided. It is through these openings that the ionized particle stream diffuses outwardly. For this purpose, these openings are connected to the nozzles of the particle emitters, the details of which are shown in fig. 2. In practice, the ionizing particle generating apparatus according to the present invention comprises four to twenty-four particle emitters.

The ionized-particle generating apparatus 1 according to the present invention includes a structure 20 made partially of a conductive material. In fig. 1, the structure 20 is shown in dashed lines to indicate that it is arranged at the rear of the front face 3. Here, the structure 20 is in the form of a grid. In addition, this structure 20 is connected to the ground line 25 of the ionized-particle generating apparatus 1 according to the present invention.

Fig. 2 shows a side view of an ionizing particle emitter of an ionizing particle generating apparatus 1 according to the present invention. The emitter is assigned to one 10 of the openings 5 to 13 on the front side 3. Of course, each of the openings 5 to 13 is assigned to a similar ionizing particle emitter. The emitter in fig. 2 comprises a conical nozzle 30 connected to a tube 35 constituting a sheath, in which a rod 38 of electrically conductive material is arranged. The first end of the rod 38 is a tip 39 at the nozzle 30 and is electrically connected at each end to a plate 42 having a negative voltage generated by a high voltage generator 45. The voltage values provided may produce a corona effect.

The ionizing particle emitter also comprises a plate 50 provided with a passage to surround the sheath 35 and having a positive voltage generated by the generator 45. The plate 50 is also connected to the earth 25 and therefore has an earth potential 25. An exit face 55 is also provided on the nozzle 30. The structure 20 is placed on the inner surface of the front face 3. The structure 20 may be sandwiched between the inner surface and the exit face 55. It is clear that all emitters comprised by the ionized particle generating apparatus 1 according to the present invention may share the plates 42 and 50. The exit faces 55 may be identical.

As a variant, the exit face and the front face are combined, so that the structure is integrated into the housing material of the ionized particle generating apparatus 1 according to the invention. Mounting tabs, such as tab 60, may be provided for securing various components of the ionizing particle emitter to front face 3.

According to another variant, these tabs can be used for the fixing structure 20.

A structure 20 according to a first embodiment is shown in fig. 3. This embodiment relates to an apparatus comprising nine ionizing particle emitters as described above. Here, the structure 20 is composed of a plurality of segments S1 to S10, which surround nine nozzles E1 to E9 shown in fig. 3.

A second embodiment of the structure 20 is shown in fig. 4, which relates to an ionized particle generating apparatus 1 according to the present invention having four ionized particle emitters. In this case, the segments S11 to S15 constituting the structure 20 according to the present embodiment do not surround the nozzles E11 to E14 arranged side by side in a straight line, but are placed in the vicinity of both sides of the nozzles E11 to E14.

All segments making up structure 20 have earth potential 25. This is achieved by means of an electrical connection 70, shown in dashed lines in fig. 4, which is connected to the earth 25. These segments are of elongate shape with a transverse dimension "t" much smaller than the diameter "D" of the nozzle. S1 and E1 are shown in fig. 3, respectively.

The web of segments making up the structure 20 may also be continuous, that is, integrally formed, with adjacent segments being joined together in pairs.

Fig. 5 shows a layout modification of the structure 20 on the front face 3 of the ionized particle generating apparatus 1 according to the invention. Fig. 5a shows the front side 3 and fig. 5b and 5c show cross-sectional views of the front plate 3 along the line AA'.

Fig. 5b shows the structure 20 glued to the inner surface of the front side 3.

In fig. 5c, the structure 20 is arranged in a recess made in the inner surface of the front side 3, which protects the structure 20.

The constitution of the structure 20 of the ionized-particle generating apparatus 1 according to the present invention will now be described in detail with reference to fig. 7 to 10.

In a first embodiment, shown in fig. 7, the structure 20 of the ionized-particle generating apparatus 1 according to the present invention comprises a core 200 of electrically conductive material, which here has a rectangular cross-section. The structure 20 of the ionized particle generating apparatus 1 according to the present invention further includes a sheath 21 surrounding or wrapping the core 200. The sheath 21 is made of a weakly conductive material, such as a polymer material, having a predetermined resistance Rb. For example, the thickness of the core 200 is about 0.2mm, and the thickness of the sheath 21 is about 0.05 to 0.2 mm.

As shown in fig. 7, the structure 20 is in close contact with the inner surface of the front face 3, and the sheath 21 is sandwiched between the front face 3 and the core 200 of the structure 20 of the ionized particle generating apparatus 1 according to the present invention. In operation, the front face 3 has a resistance Ra which, superimposed on the resistance Rb of the sheath 21, is sufficiently low to allow the charges accumulated on the outer surface of the front face 3 to be discharged through the sheath and the front face. While the resistance Rb of the sheath 21 is sufficiently high to prevent or at least significantly reduce the surface currents that may be present on the inner surface of the front face 3, due to the leakage currents generated by the passage of the ionized particles emitted by the ionized particle emitter and passing through the gap at the junction between the conical nozzle 30 and the front face 3 without resistance, since the ionized particles themselves give the air a high electrical conductivity that generates such leakage currents.

Fig. 9 shows a modification of the first embodiment. In this modification, which differs from the first embodiment in that the core 201 is circular in cross-section, the sheath 23 surrounds or encases the core 201 in the same manner as previously described. The operation of the ionized particle generating apparatus 1 according to the present invention is not changed. As a variant, the cross section of the core 200 or 201 is of arbitrary shape.

In a second embodiment, shown in fig. 8, the structure 20 of the ionized-particle generating apparatus 1 according to the invention is arranged in a recess made on the inner surface of the front face 3 and comprises a core 200 of electrically conductive material, here having a rectangular cross section. The core 200 is in direct contact with said front face 3 due to the arrangement in the recess. The structure 20 of the ionized particle generating apparatus 1 according to the present invention further includes a protective strip 22 covering the recess so as to completely confine the core 200 within the recess. As with the aforementioned sheath 21 or 23, the protective strip 22 is made of a weakly conductive material or even an insulating material, such as a polymer material, having a predetermined resistance Rb. The protective strip 22 here has the sole function of preventing or at least significantly reducing surface currents which may be present on the inner surface of the front side 3, and according to one embodiment of the protective strip 22 is a varnish layer which has electrically resistive properties which can serve this function.

In fig. 10, an implementation variant is shown in which the core 201 has a circular cross section in direct contact with the front face 3 and is covered with a protective layer 24 of a material similar to that of the protective strip 22 described previously. As a modification, the cross section of the core 201 is rectangular as in the core 200, or is an arbitrary shape.

In fig. 11, another variant of embodiment is shown, in which the core 200 is still placed in a recess made on the inner surface of the front face 3, but the protective strip 220 blocks this recess, so as to completely confine the core 200 within said recess, while being flush with the inner surface of the front face.

For example, the resistivity of the front side 3 is about 10³To 10¹⁸Ohm-meter. The sheath 21, 23 or protective strip 22, 220 or protective layer 24 has a resistivity Rb of about 10¹⁵To 10²⁵Ohm-meter.

It has been measured that when the structure 20 comprises only a single core 200, 201, such as the structure of the device in WO 2017/093630, at high density only one third to one half of the ionized particles emitted by the tips 39 diffuse into the air, the remainder forming a leakage current as described above, with a significant increase in ozone production. With the ionized-particle generating apparatus 1 according to the present invention as described above, 80% to 90% of the ionized particles emitted from the tip 39 are diffused into the air. It is to be noted that the discharge of ozone is related to, on the one hand, the electric field and, on the other hand, the volume density of the electrons in the air, the presence of the leakage current increasing the electron density and thus promoting the production of ozone.

According to an embodiment, the structure 20 of the ionized-particle generating apparatus 1 according to the present invention may be manufactured by printed circuit technology or may be manufactured by deposition of a conductive material such as a layer of metal or graphite material.

The ionized particle generating apparatus according to the present invention, which has a rounded appearance of a curved shape, which is pleasant and attractive to the user, can be manufactured in a simple manner by the structure 20 (see fig. 6).

It is noted that by reversing the polarity of the generator 45, positive ions can be generated.

Of course, many modifications may be made to the invention without departing from its scope.