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INVENTION
Patent of the Russian Federation RU2200701
OZONE GENERATOR
Applicant's name: Open Joint-Stock Company "Research Institute of Gas Discharge Devices" Plasma "
The name of the inventor: A. Baranov; Elesin AP; Mikhailova T.K.
The name of the patent holder: Open Joint-Stock Company "Research Institute of Gas Discharge Devices" Plasma "
Address for correspondence: 390023, Ryazan, ul. Tsiolkovsky, 24, Open Joint-Stock Company "Research Institute of Gas Discharge Devices" Plasma "
The effective date of the patent: 2002.01.28
The ozone generator refers to a device for producing ozone with the help of an electric discharge and can be used in various branches of the national economy for treatment with an ozone-air mixture of various rooms. The ozone generator comprises a dielectric cylindrical tube having a metal electrode on its outer surface, an inner electrode in the form of a hollow cylinder made of a wire mesh and coaxially installed without a gap along the inner surface of the dielectric tube, a high voltage power supply and an airflow delivery system inside the dielectric tube. The grid cell step of the internal electrode is 2-4 mm , and the diameter of the wire is 0.5-0.8 mm . The device reduces the voltage applied to the discharge electrodes, simplifies the design and obtains maximum performance.
DESCRIPTION OF THE INVENTION
The invention relates to an apparatus for producing ozone by means of an electric discharge and can be used in various branches of the national economy for processing ozone-air mixtures of various rooms: conference halls, cinemas, storage facilities for agricultural products, residential premises, bathrooms, etc.
A powerful small-sized electric spark ozone generator is known, which contains a grounded casing in the form of a tube, a high-voltage electrode, an air supply system and a high-voltage current source. The high-voltage electrode, which is a cathode, is made in the form of an N-beam star made of thin plates of metal foil, active facing the inner surface of the casing, the ends of which have the form of rails with equilateral teeth with a base and rounded apexes ( see RF Patent No. 2141447, From 01 to 13/11, 20.11.1999 ).
The disadvantage of this device is the complexity of manufacturing a high-voltage electrode and the whole ozone generator as a whole.
A device for ozone disinfection is known which comprises an outer mesh cylindrical electrode and an internal electrode equipped with discharge disks and ionizing disks of a star shape that are separated by remote bushings ( see USSR Authors 1465412, Mkl 4 S 01 B 13/10, 15.03 .1989 ).
The disadvantage of this device is the large voltage applied to the electrodes ( 15-40 kV ) and the complexity of the ozonator design.
Known is an ozone generator consisting of a cylindrical dielectric tube with a metallized coating on the outer surface forming an outer electrode, an internal electrode in the form of a hollow metal cylinder, with holes located on its side surface installed inside the dielectric tube, a high voltage voltage source and a supply air connection, The total total cross-sectional area of the cylinder openings is larger than the cross section of the inlet fitting ( see USSR Authors 1724567, Mkl 5 V 01 V 13/11, published on 07/04/1992 ).
The disadvantages of this generator are the constructive complexity of manufacturing the internal electrode, the large amount of voltage applied to the electrodes and the low productivity of the device.
The closest device of the same designation to the claimed object according to the plurality of features is an ozone generator comprising a dielectric cylindrical tube on the outer surface of which a metal electrode is located, an inner cylindrical electrode made of wire mesh and coaxially installed without a gap along the inner surface of the dielectric tube, Voltage and a system of supplying airflow inside the dielectric tube ( see FRG 2606731, class C 01 B 13/11, 12.01.78 ) - a prototype .
The disadvantage of this generator is the impossibility of obtaining maximum performance of the device due to the uncertainty of the grid pitch and the diameter of the wire mesh.
The object of the present invention is to provide an easy-to-manufacture and efficient ozone generator with a reduced voltage applied to the electrodes.
The technical result will be obtained by selecting the optimum mesh size of the internal mesh electrode, which does not require additional processing, which will simplify the manufacture of the ozone generator and ensure its maximum performance.
Said technical result in the practice of the invention is achieved by the fact that in a known ozone generator comprising a dielectric cylindrical tube having a metal electrode on its outer surface, an inner electrode in the form of a hollow cylinder made of a wire mesh and coaxially installed without a gap along the inner surface of the dielectric tube, A source of high voltage voltage and an air flow system inside the dielectric tube, the grid cell step of the inner electrode is 2-4 mm , and the diameter of the wire is 0.5-0.8 mm .
The choice of the optimal step of the grid cells of the inner electrode and the optimal diameter of the wire of the grid ensures the maximum productivity of the ozonizer. In addition, a low supply voltage (below 3 kV ) simplifies the electronic part of the power source and the entire ozone generator as a whole.
The Applicant's prior art analysis, including the search for patent and scientific and technical information sources and the identification of sources containing information on analogs of the claimed invention, made it possible to establish that the applicant did not find an analogue characterized by features identical to all the essential features of the claimed invention, and the definition from the list The revealed analogs of the prototype, as the closest in the totality of the characteristics of the analogue, made it possible to identify a set of essential features in relation to the technical result of the distinguishing features seen in the claimed object, stated in the claims.
Consequently, the claimed invention corresponds to the requirement "Novelty" under the current legislation. In order to verify compliance of the claimed invention with the requirements of the inventive level, the applicant conducted an additional search for solutions in order to identify features that coincide with the features of the claimed invention that are distinct from the prototype, the results of which show that the claimed invention does not explicitly follow from the prior art defined by the applicant The influence of the transformations envisaged by the essential features of the claimed invention on the achievement of the technical result was revealed. Therefore, the claimed invention corresponds to the requirement "Inventive level" according to the current legislation.
The essence of the claimed invention is illustrated graphically.
1 shows a general view of an ozone generator.
In Fig. 2 is a plot of the performance of an ozone generator from a grid design, wire diameter d and step z (d · z).
3 shows a form of a barrier gas discharge.
The ozone generator consists of a dielectric cylindrical tube 1 on the outer surface of which a metal electrode 2 is fixed, an internal electrode 3 constituting a cylinder made of a metal mesh and placed coaxially into a dielectric cylindrical tube without a gap. The internal 3 and outer 2 electrodes are connected to an alternating current source 4. The air flow delivery system inside the dielectric tube is designed as an electric fan 5.
The generator works as follows. When a high voltage is applied from the source 4 to the electrodes 2 and 3, a barrier discharge occurs between them, the discharge occurring on the filaments of the inner electrode electrode 3. The air supplied by the fan 5 inside the cylindrical tube 1, blowing through the grid cells, is exposed to an electric barrier discharge, in As a result, ozone is formed from oxygen in the air, which, when mixed with air, forms an ozone-air mixture and is taken out of the cylindrical tube into the room treated with ozone.
The size of the grid pitch and the diameter of the wire depends on the productivity of the ozonizer. With a small grid pitch (less than 2 mm) and a small wire diameter (less than 0.5 mm), the volume of the gas participating in the discharge decreases due to a reduction in the thickness of the gas layer. With a large step of the grid (more than 4 mm) and a large diameter of the wire (more than 0.8 mm) and the volume of the gas participating in the discharge decreases due to a non-continuous discharge in the gas layer.
Experimental studies of an ozone generator with a dielectric tube diameter of D = 125 mm and a length of L = 150 mm have shown that the performance of the ozone generator "Q", all other things being equal, depends on the design dimensions of the inner electrode grid, the cell spacing z and the wire diameter d.
It was experimentally revealed that for the given ozone generator the optimal grid design parameters are z = 2 mm and d = 0.5 mm, while the maximum capacity (Q) of the ozone generator is reached, and the voltage at the electrodes is 2.8 kV.
The results of experimental studies of the dependence of the productivity of the ozone generator on the structural dimensions of the mesh from which the inner electrode of the ozone generator is made are shown in FIG.
From the graph of FIG. 2, it can be seen that the design dimensions of the mesh, which can be used to fabricate the internal mesh electrode of the ozone generator, without significantly reducing the productivity, are z = 2-4 mm and d = 0.5-0.8 mm.
The proposed technical solution makes it possible to simplify the design of the ozone generator, reduce the voltage supplied to the discharge electrodes by more than 2-3 times, by collapsing with the known ones, which in turn simplifies the electronic part of the generator, increases its durability and reliability, ensuring its maximum performance .
We give an example that proves the possibility of practical implementation of the proposed ozone generator used in the OD-10G ozonizer. The proposed ozone generator consists of a glass cylinder with a diameter of 125 mm, a length of 148 mm, a wall thickness of 3 mm and 2 electrodes.
The outer electrode is made of aluminum foil with a thickness of 0.2 mm and a size (114 × 420) mm. The internal electrode is made of a half-thick mesh size (114 · 380) mm, the wire diameter of the mesh is 0.5 mm, the cell pitch is 2 mm.
The proposed ozone generator is housed in a plastic housing together with a power source and a control panel. To exit the ozone - air mixture on the side surface of the body is a hole diameter of 124 mm, closed for safe operation of the ventilation grill.
Overall dimensions of ozonizer OD-10G: length - 600 mm; Width - 300 mm; Height - 315 mm; Weight - 12 kg.
The technical characteristics are as follows: ozone capacity not less than 5 g / h; Consumed power from the AC mains is not more than 0.5 kW; Time of continuous operation no more than 3 hours.
The ozonator is designed for ozone treatment of various rooms and their air environment.
This example shows that the claimed invention meets the requirement of "industrial applicability".
CLAIM
An ozone generator comprising a dielectric cylindrical tube having a metal electrode on its outer surface, an inner electrode in the form of a hollow cylinder made of a wire mesh and coaxially installed without a gap along the inner surface of the dielectric tube, a high voltage voltage source and an airflow delivery system inside the dielectric tube, Characterized in that the step of the grid cell of the inner electrode is 2-4 mm, and the diameter of the wire is 0.5-0.8 mm.
print version
Date of publication 12.11.2006гг
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