Clorox Scentiva Disinfecting Wipes, Bleach Free Cleaning Wipes - Tuscan Lavender and Jasmine, 70 Count
DEVICE FOR DISINFECTING SURFACES BY MEANS OF COLD PLASMA
Abstract
And can be used in medicine, microbiology, cosmetology, animal husbandry and other areas of the national economy. The essence of the proposed device lies in the fact that in its case, which is simultaneously a handle, an AC voltage converter is mounted, one of the output poles of which is galvanically or through a capacitor connected to a common wire or / and device grounding bus which is fixed on the handle. Moreover, the electrode surface is covered with a dielectric layer. This technical solution extends the functionality of the device and allows you to handle the surface of objects of various configurations and large sizes.
Claim
1. Device for disinfecting surfaces by means of cold plasma, containing an electrode covered with a dielectric layer and an alternating voltage converter, characterized in that the latter is located in the device case, which is also a handle; the electrode is fixed on the handle and connected to one of the output poles of the converter, and its other output pole is galvanically or through a capacitor connected to the common wire or / and / and the device grounding bus.
2. The device according to claim 1, characterized in that the handle is equipped with a connector, in which are mounted interchangeable electrodes of various configurations.
Description
The invention relates to disinfection techniques, sterilization and degassing of surfaces of various objects / products, materials, skin and wound surfaces of animals and humans, plant surfaces, etc. / and can be used in medicine, microbiology, cosmetology, animal husbandry and other areas of the national economy.
Known disinfectants and sterilizers using plasma glow gas discharge. One of the main disadvantages of these devices is the need to create a vacuum gas environment in the working chamber. In this regard, more attractive is the cold plasma created in a gaseous medium at normal atmospheric pressure.
Known [1] is a method for producing such a plasma using a barrier / quiet / electrical discharge and a plasma-chemical reactor (inductor) device, which consists of two flat electrodes, the gap between which forms a discharge gap. Moreover, the inner surface of at least one of the electrodes is covered with a dielectric layer. The electrodes are connected to a high-voltage source of alternating voltage, when switched on, a quiet discharge arises in the gap between the electrodes and a cold plasma is formed. In [2], its sporicidal effect on test objects placed in the described reactor was shown.
The disadvantage of this device is a small working gap between the electrodes, not exceeding 10 mm, which significantly limits the range of objects that can be processed using the described prototype.
The purpose of this invention is to create a device with advanced functionality, with which you can handle surfaces of various configurations and large sizes.
The essence of the proposed device lies in the fact that it contains an electrode covered with a dielectric layer and a high-voltage AC voltage converter, which can be used as an inductive, piezo-ceramic or other transformer. Unlike the prototype, the latter is located in the case of the device, which is simultaneously a handle. The electrode is mounted on the handle and connected to one of the output poles of the converter, and its other output pole is galvanically or through a capacitor connected to the common wire and / or / and the device grounding bus. The input poles of the high-voltage converter are connected to an alternating voltage generator, which can also be placed in the handle or made as a separate unit, connected to the handle with a flexible cable. There are no increased requirements for the electrical strength of the cable, since the voltage applied to the high-voltage converter does not exceed several hundred volts. Primary power supply of the device can be made both from the industrial AC network and from a DC source, which, if necessary, can also be placed in the handle.
To extend the functionality of the device handle is equipped with a connector with which it can be attached interchangeable electrodes of various configurations.
The described device can be used for disinfection, sterilization and destruction of toxic substances on fairly large surfaces of various objects, including on the skin of animals and humans, as well as on the surfaces of plants and on the soil. When using needle-shaped electrodes, it is possible to treat the internal surfaces of cavities, including the wound surfaces of animals and humans, and also use this device for non-contact reflexotherapy. For processing surfaces with complex configuration, it is advisable to use an electrode in the form of a brush consisting of flexible conductors enclosed in a dielectric shell.
1 schematically shows an example of the construction of the device for the variant when the alternating voltage generator is mounted in the handle. Figure 2 shows the equivalent electrical circuit of the discharge circuit.
The device consists of a housing 1, which is simultaneously a handle of an arbitrary shape, for example cylindrical. The housing has a connector 2, in which the electrode 3 is fixed, covered with a dielectric layer. Its thickness on the working surface 4 can be 0.2.2 mm, depending on the voltage applied to the electrode and the dielectric strength. When the dielectric thickness is less than 0.2 mm, the probability of its breakdown increases, and when the thickness is more than 2 mm, the coefficient of conversion of the electric field energy into the plasma energy induced in the gap 11/2/2 between the electrode 3 and the surface 10 of the object being processed significantly decreases.
Inside the housing 1 there is a step-up transformer 5, one of the conclusions of the high-voltage winding of which is connected via connector 2 to electrode 3, and the other through capacitance 6 / or galvanically / connected to the common wire and / and / grounding bus of the device. To reduce the electromagnetic field induced into the surrounding space and increase the capacitive coupling between the common wire of the device and the operator's hand, the inner surface of the housing is covered with an electrostatic screen 7 / in the case of a dielectric case / connected to the common wire and / and / grounding bus. Low-voltage input winding of the transformer 5 is connected to the output of the alternating voltage generator 8, also located in the device. The generator 8 is connected to a source of electrical energy by a flexible cable 9.
In addition to the elements shown in FIG.
Disinfection of the surface using the described device is as follows. The operator takes the device in his hand and supplies power to the alternating voltage generator 8. As a result of the generator operating, a high voltage winding of the transformer 5 generates alternating voltage, the amplitude of which can be from 10 kV to 100 kV and the oscillation frequency lies in the interval from tens of Hz to hundreds of kHz . When approaching the electrode 3 to the surface of the object being processed 10 / FIG. 2/, for example, to the skin of a person, when the gap 11 between them is less than 10 mm, in the latter a quiet discharge is induced, accompanied by a blue-blue glow of cold plasma. Its components / electrons ions, excited atoms, molecules and radicals /, ultraviolet radiation and products of plasma-chemical reactions / for example, ozone / cause the disinfecting effect of this discharge on the treated surface. If surface treatment with an area larger than the electrode area is necessary, the operator scans the latter above the surface of the object, maintaining the plasma "burning".
The flow circuit of the discharge current, shown in figure 2, is formed due to the presence of electrical conductivity of the object being processed and the mutual capacitance between it and the operator, holding the device in his hand. The result is a capacitive coupling of the object with the corresponding output of the high-voltage winding of the transformer, which is reflected in figure 2 by an equivalent capacitance 12. The presence of electrical resistance on the object being processed is not reflected in figure 2, but if necessary, can be easily taken into account in the corresponding equivalent circuit. In the case of very low permeability of the object, its surface can be artificially moistened with a conductive fluid, for example water.
Experiments carried out with the described device showed that the plasma induced by them well penetrates various porous fabrics: gauze, wool, silk, cotton, etc. Therefore, the processing of such tissues placed on a conductive surface without their additional moisture is possible. In addition, it is possible to treat the skin and wound surfaces of a person even through clothing or gauze dressings, the latter being also subjected to disinfection simultaneously with the skin.
If a needle or wire electrode with a bare end is used in this device, the device can be used as an electrosurgical apparatus or an electric arc welding apparatus. In this embodiment, a stable high-frequency arc discharge arises between the electrode and the surface of the object, even if the gap is larger than 10 mm.
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