RU2185320C2 - System for rooms ozonization - Google Patents

Abstract

FIELD: food industry and agriculture; applicable in disinfection of rooms for storage of food products. SUBSTANCE: system has network transformer 1, low-voltage power supply unit 2, programmer-timer 3 whose output is connected to voltage converter 6, ozone transducer with threshold device 4, and ozone generator 8 with high-voltage transformer 9. Threshold device 4 registers excess or reduction of permissible concentration of ozone and ensures disengagement or engagement of ozone generator 8 through programmer-timer 3. Ozone transducer with threshold device 4 is connected by its one output to programmer-timer 3, and by its other output, to indication device 5 including information board on control unit. Switching-on of timer of programmer-timer 3 presetting duration of treatment is effected after attaining in room of minimal value of ozone working concentration. EFFECT: provided safety of attending personnel. 2 cl, 1 dwg

Description

 The invention relates to the food industry and agricultural production, and in particular to methods of disinfecting premises for storing food products in order to prevent infection of the product with infections, fungi, mold and increase its safety by using an ozone-air mixture obtained using an ozone generator from the air of these rooms, and can widely used for rapid disinfection of air and surfaces of any storage facilities for storing food products, and t Improvement kzhe for domestic purposes with high sanitary requirements, and with the possibility of regulating the ozone concentration in the treated volume space within a certain range.

 The well-known "Ozonized Air Production System" containing a series-connected filter, compressor, dehumidifier, an ozonizer with a power source, a fan, the latter is equipped with a programmable air flow regulator and is installed in front of the ozonizer (ed. USSR certificate 1214581, MKI4 01 V 13/11; application 3743046 / 23-26; filing date 05/21/84; publication date 02/28/86, bull. 8. Applicant: V.I. Ulyanov Leningrad Electrotechnical Institute).

 Known "Installation for the production of ozone" containing an ozone generator, a high voltage power source of an ozone generator, comprising a rectifier, a thyristor high-frequency inverter and an inverter control system containing a timing RC circuit and a switching element, the installation further comprising a resonant frequency sensor and a zener diode connected in parallel a capacitor of a timing RC circuit, and the switching element is made in the form of a thyristor, the control electrode of which is connected to the output of the resonant sensor frequency connected in series with the ozone generator (USSR Authorship Certificate 1370072, MKI4 01 V 13/11; G 05 D 27/00; application 4061908 / 31-26; application filing date 24.04.86; publication date 01.30.88 g .; bulletin 4. Applicant: Kirov Polytechnic Institute).

 The known "Ozone Generator with built-in sensor" containing a grating placed in the housing, and a high voltage circuit connected to the grating to form an electric field. The circuit is powered by an AC source and has a control circuit that allows you to obtain linearly adjustable high voltage output. The installation also includes a sensor for determining the level of ozone generating, which does not affect the value of this content. The specified high-voltage circuit can be used for other purposes where an output signal in the form of a high voltage is required, the level of which can be precisely controlled (application PCT 9637432 (WО), MKI6 01V 13/11; application filing date 26.05.95 g. , PCT / CA 95/00316; publication date 09/02/98; Bulletin 2/98 ISM issue 37. Applicant: Vasogen Inс).

 Known "Circuit generating a sequence of pulses and used to regulate the operation of the generator", containing electrodes or laser. The circuit generates a first signal corresponding to a given level of ozone production rate, and a control signal of a given duration, consisting of unlocking and blocking components. The temporal sum of the unlocking components of the control signal in the first time period corresponds to a predetermined rate of ozone formation. A sequence of pulses corresponding to the unlocking components of the control signal is supplied to an ozone generator. The amount of ozone generated in the indicated first period of time is directly related to the sum of the pulses in the sequence supplied to the generator, which allows you to precisely control the amount of ozone generated (application PCT 9639355 (WO), MKI6 C 01 B 13/11; application filing date 06.06. 95 g., PCT / 1B95 / 00441; publication date 10/01/98, ISM Bulletin No. 2-98, Issue 37. Applicant: Security Corr).

 Closest to the technical solution proposed as an invention is a "Method for controlling the performance of an ozone generator and a device for its implementation", comprising ozone generators, a performance sensor for ozone generators, a high-frequency power supply for ozone generators, including an industrial frequency rectifier with a rectifier control system, a current inverter high frequency with an inverter control system, a high voltage transformer, and in it to a power source I introduced a temporary master switch connected to the inverter by its output, and an ozone generator performance adjuster connected to the switch and connected by its input to the inverter control system (RF patent 2100272, MKI6 01/13/11; G 05 D 27/00; application filing date 03.10.95, 95116861/25; publication date 12/27/97, bulletin 36. Patent holder: "Design Bureau of Chemical Automation").

 The disadvantages of the above technical solutions include the inability to automatically maintain the required concentration of ozone in the treated room during the entire processing cycle to ensure the reliability of their disinfection.

 The technical result, the achievement of which the invention is directed, includes the possibility of maintaining the ozone concentration in the treated room in a certain range, as well as providing information on the ozone concentration to monitor the processing process and ensure the safety of staff during the operation of the system.

 To achieve the above result, the "System for the ozonation of rooms" while maintaining a given concentration of ozone contains a network transformer, a low voltage power supply, a voltage converter, a program-time device connected by its output to a voltage converter, an ozone sensor, a high voltage transformer and an ozone generator, the ozone sensor equipped with a threshold device that captures a signal about the achievement of max or min values of the optimal concentration of ozone in the room and ensures that It is possible to turn off or turn on the voltage converter and, consequently, the ozone generator through the program-time device, in order to maintain the required concentration of ozone in the room, in addition, the ozone sensor is connected at one output to the program-time device, at the output to the network transformer, and the second output - to the display device, which includes a signal information board on the control unit (with an increase in the concentration of ozone in the room above the MPC and when the optimal concentration of ozone is reached).

 The ozone generator as a spark gap contains several flat metal electrodes separated by a dielectric and an air gap.

The system for room ozonation is structurally made of 2 blocks:
a control and power unit consisting of a network transformer 1, a low-voltage power unit 2, a program-time device 3, an indication device 5, a voltage converter 6, a fan 7, and an ozone sensor 4 with a threshold device;
block of an ozone generator, consisting of an ozone generator 8, a high voltage transformer 9, a fan 10.

 The ozonizer works as follows.

 When applying the mains voltage, the transformer 1 provides a reduced voltage of ~ 12 V, then supplied to the power supply 2 and the ozone sensor 4.

 The power supply 2 thus generates a low-voltage constant voltage + 12 V; + 9 V; + 5.6 V to power devices 3 and 5.

 At the same time, the program-temporary device 3 and the indicating device 5 are supplied with signals from the ozone sensor 4, transmitting relevant information about the ozone content in the treated room.

 The display device 5 displays the received information using indicators on the front panel of the control unit and power supply. (In the absence of ozone - green indicator light "MPC").

 At the same time, the mains voltage of 220 V, 50 Hz is supplied to the program-time device 3 for power supply after the fans 7 and 10 are turned on, and also to voltage converter 6 for powering the high-frequency bridge amplifier.

 After the operator gives the “Start” command (“Start” button on the front panel of the control and power supply unit), device 3 generates signals to start fans 7 and 10 and start voltage converter 6.

 The voltage Converter 6 generates pulse signals of a given frequency and duration, fed into the primary winding of the high voltage transformer 9.

 From the secondary winding of the transformer 9, high-voltage pulses are supplied to the electrodes of the arrester 8, between which a barrier discharge occurs in the air gap and the formation of ozone from the air.

 When the ozone reaches the maximum permissible concentration (MAC) of ozone, the sensor 4 generates a corresponding signal supplied to the indicating device 5, as a result of which the red indicator "MAC" lights up on the front panel of the control and power unit.

 When the ozone concentration in the treated room reaches the minimum boundary of the treatment mode (set when developing the technology for room disinfection), a timer is started by the ozone sensor 4 in the program-time device 3 and counts down the timer set by the operator (on the front panel the switches "Processing time intervals premises ") the time interval for processing the premises (information is displayed on digital indicators located on the front panel of the control and power unit).

 If during the operation of the ozonizer the maximum set limit (ozone concentration) of the treatment mode is exceeded, the voltage converter 6 is switched off by the command of the threshold device of the ozone sensor 4. In this case, the formation of ozone is stopped.

 Re-inclusion of the transducer 6 (and, accordingly, ozone generation) will be performed automatically at the command of the threshold device of the ozone sensor 4 after the decrease in ozone concentration below the upper limit.

 After the completion of the set processing cycle of the room, upon the command from device 3, the voltage converter 6 is turned off and the fans 7 and 10 are stopped. The indicating device 5 continues to display information about the presence of ozone in the room (> MPC). Access to the treated room and disconnection of the unit from the network is allowed when the ozone concentration is reduced to a value of <MPC.

 The division of the ozonation system into two blocks: the ozone generator unit located in the treated room, the control and power unit located outside the treated room, the presence of an indication of ozone concentration on the light panel gives complete information about the system mode and allows for the safety of maintenance personnel.

 The system provides automatic maintenance of the specified concentration of ozone in the treated room, turning on and off the ozone generator by a signal from the ozone sensor, turning off the ozone generator when working out the set time, monitoring the generator and displaying the incoming information.

Claims (2)

 1. A system for room ozonation comprising a network transformer, a low-voltage power supply, a voltage converter, a program-time device connected by its output to a voltage converter, an ozone sensor and an ozone generator with a high-voltage transformer, characterized in that the ozone sensor is equipped with a threshold device for fixing exceeding or decreasing the permissible concentration of ozone and providing, respectively, turning off or turning on the voltage converter through the program-time device Nia and hence the ozone generator, the ozone sensor is connected to one output of the program-timing unit and the other - to the display device comprising a signaling information display on the control box.  2. The system according to claim 1, characterized in that the timer of the program-time device that sets the processing time is turned on after reaching the minimum value of the working concentration of ozone in the room.