RU2781176C1 - Apparatus for sterilising and supplying air to the in vitro micro-plant growth zone - Google Patents

Abstract

FIELD: separation.

SUBSTANCE: invention relates to disinfection means. Apparatus for sterilising and supplying air to the in vitro micro-plant growth zone comprises a receiving air preparation apparatus. The body of the receiving apparatus is made in the form of a pipe with mirrored internal walls, wherein an arc bactericidal UV lamp and a high-voltage tip of an anion negative particle generator are placed at the centre inside said pipe. The inlet of the body is equipped with a removable cover with a bactericidal air filter. An air compressor is connected to the outlet of the body, wherein attached to the outlet nozzle of said compressor is an air distribution apparatus with air tubes for connection to the working growth chambers with in vitro plants.

EFFECT: increase in the effectiveness of disinfecting and purifying air from hazardous microorganisms.

1 cl, 1 dwg

Description

SUBSTANCE: invention relates to disinfectants and can be used for bactericidal disinfection and purification of air from harmful microorganisms and further, to be supplied to the development zone of the root system of microplants growing under in vitro conditions.

A device for air disinfection is known, comprising a housing with inlet and outlet windows, in which an irradiation chamber is formed with longitudinally placed gas-discharge mercury (bactericidal) low-pressure lamps, equipped with labyrinth screens at the inlet and outlet, and a fan and a filter are installed (RU 2153886 C1, A61L 9/20, 2000).

A device for air disinfection is also known, similar to the device described above, but with the difference that a fan and a filter are installed in the device at both ends of the device, and a structure of labyrinth screens is arranged inside the chamber (RU 2306150 C1, A61L 9/20, 2006.01).

The disadvantage of these devices is excessive hydraulic resistance, which prevents the passage of air due to the design features of the labyrinth screens and uneven treatment of the air circulating in the irradiation chamber with a bactericidal radiation flux.

The invention is aimed at improving the efficiency of air disinfection and reducing the hydraulic resistance of the device.

The problem is solved by the fact that the device is made of a hollow thin-walled tube 300 mm long made of stainless steel with mirrored inner walls, inside which an arc bactericidal lamp is placed in the center, irradiating the entire space and all the air flow entering the chamber. In addition to irradiating the passing air flow with UV rays, a high-voltage tip of the anionic generator of negative particles is placed inside the sterilizer chamber, which provides additional air purification due to air ionization, and performs the functions of disinfecting and purifying the air from harmful microorganisms. The air entering the chamber after treatment is pumped out by an air compressor and enters the air distribution network of air ducts that supply purified air directly to the working chambers with growing plants. Air enters the chamber through an air bactericidal filter due to high vacuum. Vacuum in the chamber is created due to the fact that the suction air window of the compressor is connected to the outlet nozzle from the sterilizer chamber and when air is evacuated in the chamber, a high air rarefaction is created, which contributes to the active suction of outside air through the filter element into the working chamber of the sterilizer. The electrical equipment of the device is protected from the harmful effects of UV radiation, since all the working elements of the compressor and the air distribution system are not directly exposed to UV rays. The contacts of the starting device of the UV lamp are connected to the contacts of the air compressor and when voltage is applied, the compressor and the UV emitter are turned on simultaneously.

The operating mode of the sterilizer is periodic and is 15-20 minutes of operation with a break of at least 20 minutes, in order to comply with the technological mode of operation of the UV lamp. Re-ignition of the bactericidal lamp DRT 125 is possible only after it has cooled down, while the re-ignition time must be at least 15 minutes.

Sterilizer Composition

1. The body of the air disinfection device has a cylindrical shape, made in the form of a thin-walled stainless steel pipe with a length of 300 mm and a diameter of 100 mm. The inlet of the device is equipped with a removable cover equipped with a bactericidal air filter. Attached to the outlet of the device is a cover equipped with an outlet air nozzle, to which the suction valve of the air compressor is attached.

2. The bactericidal lamp installed inside the sterilizer is a high-pressure discharge ultraviolet lamp DRT 125, with a power of 125 W and designed to work in an alternating current network with a frequency of 50 Hz, a voltage of 220 V with an appropriate active ballast resistance. The power consumption of the irradiator is 300 VA. Distribution of UV radiation of a germicidal lamp in areas A, B, C in relation to the total radiation power in percent:

Quartzizer radiation spectrum - 180-400 nm

area A (UVA, UV-A, UV-A), 315-400 nm - no more than 21%

region B (UVB, UV-B, UV-B), 280-315 nm - no more than 25%

region C (UVC, UV-C, UV-C), 230-280 nm - no more than 11%

3. Control device for tubular arc discharge lamps type DRT 125 of the UVT series UU 220-125-01 SPECIAL Supply voltage AC 220 V, Supply frequency 50 Hz, Rated lamp power 12.5 W.

4. An air compressor that circulates purified air, has a capacity of 350 to 600 l / min, operates from an alternating current with a frequency of 50 Hz, a voltage of 220 V.

5. The air distribution network consists of silicone tubes with an inner diameter of 4 to 10 mm, which can withstand sterilization at a temperature of 125C for 2.5 hours.

ионов/см³ на расстоянии 100 мм6. Anion generator of negative particles (ionizer) - the air purifier operates on alternating current with a voltage of 100-240 V, a frequency of 50 Hz. Input current: ≤10mA. Rated power: ≤1W. Output voltage ≤2.5kV. Generated ozone density: <0.05ppm. Negative ion concentration:

ions / cm ³ at a distance of 100 mm

The drawing shows a General view of the device for air disinfection.

Device for ultraviolet air disinfection works as follows. When the voltage is applied, the air compressor 2 and the ultraviolet irradiator 3 are turned on simultaneously. When the compressor 2 is operating, air is pumped out of the sterilizer 1, as a result of which a high vacuum of air is created inside the chamber, where the UV lamp 3 irradiates the passing air stream 5 sucked through the air bactericidal filter 6. When In this case, simultaneous air ionization occurs due to the anion generator of negative particles 7 due to the high-voltage discharge electrode 8 placed inside the sterilizer chamber 1. An air distribution device 9 is connected to the outlet nozzle of the compressor 2, from where it enters the destination through the air tubes 10 of the distributor. With the forced supply of purified air to the chambers with cultures, excessive pressure is created in them, which prevents the penetration of harmful organisms into the chamber from the outside. The flow rate and pressure force at the outlet of the compressor is regulated by the pressure relief valve 11. In case of an excessive increase in air pressure inside the chambers, special air valves are provided to relieve excess pressure, arranged in the walls of the chambers.

Literature

RU 2153886 C1, 2000.08.10. Sizikov V.P. DEVICE FOR AIR DISINFECTING.

RU 2306150 C1, 2006.01.26. Sizikov V.P. DEVICE FOR AIR DISINFECTING.

Claims (1)

A device for sterilizing and supplying air to the zone of in vitro plants, containing a receiving device for preparing air, characterized in that the body of the receiving device is made in the form of a tube with mirrored inner walls, inside which an arc bactericidal UV lamp and a high-voltage tip of an anion negative generator are located in the center. particles, the inlet of the housing is equipped with a removable cover with a bactericidal air filter, and an air compressor is attached to the outlet of the housing, to the outlet nozzle of which an air distributor with air tubes is connected for connection to working growth chambers with in vitro plants.

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