RU2289542C2 - Ozonizer - Google Patents

Abstract

FIELD: production of ozone.

SUBSTANCE: the invention is pertaining to the devices for production of ozone. The ozonizer includes the body, the earthed electrode and the high-voltage electrode, the chiller, the dielectric plate, which edges are protruding beyond the limits of the high-voltage electrode. The foundation of the body fulfill the function of the earthed electrode, on the surface of which there is the dielectric plate. The dielectric plate is preliminary metallized from the both sides and is subjected to pickling on the one side for formation of the high-voltage electrode directly on the upper surface of the dielectric plate. The invention ensures simplification of the design and maintenance, the increase of reliability.

EFFECT: the invention ensures simplification of the design and maintenance, the increase of reliability.

3 dwg

Description

The invention relates to devices for producing ozone. Known ozonizer [Pat. Russia No. 2077154, class C 01 B 13/11, Bull. No. 10 of 04/10/97], containing a package of rectangular metal high-voltage and low-voltage flat electrodes separated by rectangular dielectric plates, the high-voltage electrodes being made in the form of corrugated rectangular plates having protrusions along the edges of the corrugations of the corrugations to create a gap between the electrodes and the dielectric plate. The disadvantage of this design is that the electrodes are poorly cooled, which leads to overheating in the discharge zone, which reduces the ozone output. In addition, uneven heating of the dielectric plates can cause their destruction and failure of the ozonizer, and the complexity of the design makes repair and maintenance difficult.

The closest in the aggregate of essential features analogue is a plate ozonator [Pat. Russia No. 2147010, cl. C 01 B 13/11, Bull. No. 9 dated 03/27/2000 (prototype)], made of several discharge elements, each of which consists of two dielectric plates cooled by grounded and high-voltage electrodes having central holes and placed in a sealed parallelepiped-shaped housing. The casing is divided by an insulating plate into two compartments, with discharge elements located in the same horizontal plane and the upper compartment being a common ozone collector, while the ozonizer has two flat coolers common to all discharge elements, one of which provides heat removal from low-voltage electrodes and located on the outside of the base of the housing, and the other from the high-voltage electrodes, the latter having bushings coaxial with the central holes of the high-voltage electrodes through which missed tubes connecting the lower and upper compartments, and the number of sleeves is equal to the number of discharge elements. The reliability of such an ozonizer is significantly higher than that of the first analogue due to the effective cooling of the electrodes. However, it has a rather complicated design, consisting of a large number of parts requiring high precision performance. When disassembling it, it is difficult to avoid getting coolant residues from the upper cooler onto the discharge elements, which requires its subsequent high-quality drying, and also reduces the reliability of operation.

The technical result of the invention is to simplify the design, facilitate maintenance and increase reliability.

The specified technical result in the implementation of the invention is achieved by the fact that in the ozonizer, consisting of a body, a grounded and high voltage electrodes, a cooler, a dielectric plate, the edges of which extend beyond the high voltage electrode, it is new that the base of the body performs the function of a grounded electrode, on the surface of which a dielectric plate is placed, pre-metallized on both sides and etched on one side to form a high-voltage electrode indirectly on the upper surface of the dielectric plate.

The differences of the claimed device from the closest analogue are that its discharge element consists of one dielectric plate, has one cooler, the base of the body acts as a grounded electrode, and the high-voltage electrode is made in the form of a planar conductor directly on the surface of the dielectric plate that separates it from the grounded electrode, etching previously applied metallization.

The invention is illustrated by drawings, which depict the design of the inventive ozonizer (Figure 1), the arrester in section (Figure 2) and the topology of the high-voltage electrode of the arrester in a specific implementation of the ozonizer (Figure 3).

The inventive ozonizer consists of a housing 1 (Fig. 1), to the base of which 2 a cooler 3 is attached on the outside and a dielectric plate 4 of a spark gap (discharge element) on the inside, the base 2 acting as a grounded electrode, and the planar high-voltage electrode 5 made directly on the upper surface of the dielectric plate, and the edges of the dielectric plate should protrude beyond the high-voltage electrode. The fittings 6 and 7 are used to enter and exit the coolant, and the fittings 8 and 9 are used to introduce air (oxygen) and the output of the air-ozone (oxygen-ozone) mixture.

The ozonizer works as follows.

Ozonator electrodes 3 and 4 are connected to a source of high-voltage high-frequency voltage (to the secondary winding of a high-voltage high-frequency transformer, or to the oscillating circuit as electrodes of a capacitor formed by them together with a dielectric plate, as, for example, in Pat. Russia No. 2090495, class C 01 In 13/11, G 05 D 27/00 Bull. No. 26 of 09/20/97, etc.), sufficient to ignite a barrier discharge at the edges of a high-voltage electrode. Ozone formed in the discharge zone is discharged by blowing air (or oxygen) through the housing.

Figure 2 explains the principle of operation of the ozonizer discharger. The spark gap electrodes form a flat capacitor. When applying voltage to a high-voltage electrode, made, for example, according to planar technology (similar to that used in the manufacture of printed circuit boards or microstrip devices), the electric field created outside the dielectric has a maximum voltage near the edges of the high-voltage electrode (force fields are shown by arrows in Figure 2) , where a barrier discharge is formed.

The shape of the high-voltage electrode can be any, but it should be borne in mind that the longer the outline of the figure describing its shape, the greater the volume of the discharge zone, and therefore the performance of the ozone discharger. In addition, in order to reduce the operating voltage at the spark gap electrodes and to uniformly distribute the discharge zone along the high-voltage electrode circuit, the electrode circuit can be made in a zigzag fashion, since, obviously, excesses of the electric field intensity will occur on the zigzag edges. To protect the high voltage electrode from corrosion, a silicon monoxide film can be applied to it by evaporation in vacuum.

Figure 3 shows as an example the topology of the high-voltage electrode of the spark gap of a particular implementation of the ozonizer. As the dielectric plate, we used a standard polycor (material based on alumina) substrate 60 × 48 mm in size, 1 mm thick, metallized on both sides by vacuum deposition of copper, used for the manufacture of microstrip devices. On one side of the substrate, a high-voltage electrode was made by etching in ferric chloride, the topology of which is shown in FIG. 3. The side with solid metallization, the substrate was mounted on the base of the housing, which performs the function of a grounded electrode, and in this particular case, also a cooler. A voltage of 2.5 kV was applied to the high-voltage electrode at a frequency of 400 kHz. With a power consumption of 30 W, the ozone productivity of the device was 2.5 G / h. If you want to increase the output of ozone, you can turn on several devices of the claimed design both in parallel and in series.

As a cooler, you can use a convection-type radiator similar to that used for cooling transistors.

The proposed design of the ozonizer is very easy to maintain. To carry out repair work, it is enough to remove the upper part of the body of the ozonizer 1 (Figure 1).

Claims (1)

An ozonizer, comprising a housing, a grounded and high voltage electrodes, a cooler, a dielectric plate, the edges of which extend beyond the high voltage electrode, characterized in that the base of the housing performs the function of a grounded electrode, on the surface of which there is a dielectric plate pre-metallized on both sides and etched with on the one hand, to form a high voltage electrode directly on the upper surface of the dielectric plate.

Images