Air cleaning unit

FIELD: ventilation.

SUBSTANCE: air cleaning unit includes an air duct, in one of the walls of which there are slots, into which guides are inserted and provided with cassettes with filters for different contaminating gases, which are placed in them and have a possibility of being moved. Before filters, in a flow of cleaned air there installed are air composition sensors connected to a gas analyser that is connected to a switch. Cassettes are mechanically connected to mechanisms of their movement, which are connected to the switch. Flanges are installed on the air duct ends.

EFFECT: reduction of labour intensity and improvement of air cleaning quality due to a possibility of automatic installation of filters in the air duct, which are intended for air cleaning from those contaminating components that are available in the cleaned air in unallowable amounts.

2 dwg

 

The invention relates to a device for air purification from impurities and can be used in ventilation devices for domestic and industrial environments.

A device designed for use in ventilation and air conditioning residential, administrative and public buildings, is protected by patent No. 2241910 of the Russian Federation for invention dated 10.04.2003, IPC F24F 7/00. The known device contains a built-in wall duct having an outside knot wind shield and the free end of the room, with an additional outlet for connection of devices and units of air treatment. Inside the duct is placed a removable cartridge with slits and filters air-driven handle with latch-pointer. A removable cartridge is easily removed from the unit for filter cleaning and maintenance. The design of the known device allows to increase the quality of clean air. However, the known device allows you to clear the air from only one of the contaminants. For treatment of several components with the use of the known device it is necessary to stop the air cleaning and changing the filter, then skipping the cleaned air through the device again. This dramatically reduces the performance of air cleaning.

It is also known a device for cleaning the air� system tion (www.klimate/ru/clening_tion.htm), which is taken as a prototype. In the duct of the device according to the prior art consistently with several different filters and other air purifying devices that allow you to hold various pollutants and implement a comprehensive air cleaning. It certainly provides a better cleaning of the air. However, in the atmosphere of a modern major industrial centres of the composition of impurities in the air is not constant and depends significantly on the time of day, days of the week, the characteristics of the nomenclature of manufactured products and from a large number of other factors. Therefore, to maintain approximately constant the degree of purification of air in the device of the prototype need to constantly replace filters depending on changes in the composition of air pollution. This will increase the complexity of air purification. Installation device according to the prototype of the entire gamut of filters which can be necessary when changes in the composition of air pollution, will lead to unnecessary increase in the resistance of the device passed through it to the air flow, which would require increasing the power consumed by the device, and can make a quality air purification is not possible.

The technical result of the proposed device is to reduce the complexity and increase �quality air purification.

The essence of the proposed device for air purification is that it contains a duct, in which is sequentially inserted cassettes with filters designed for various pollutant gases. Unlike the prototype in front of the filters in the flow of cleaned air installed sensors in the composition of air, United with the gas analyzer, which is connected to the switch. In one of the walls of the duct cut slits into which is inserted the guide rails are placed in them with the ability to move cassettes containing filters. The guides are fixed to the walls of the duct. The cassette is mechanically coupled to the mechanisms of their movement, which are connected to the switch. At the ends of the duct flanges installed.

The design of the proposed device allows you to automatically install in the duct filters are designed for air purification from those contaminants that currently exist in the clean air in unacceptable quantities. The remaining cassettes with filters is possible, but currently missing in the clean air of contaminants from duct are removed automatically. This improves the quality of cleaning the air and reducing the resistance of the air duct by removing the extra at the moment fil�ditch increases the cleaning performance.

The invention is illustrated by drawings, where Fig.1 shows a General view of the proposed device, and Fig.2 - cross section A-A in Fig.1.

The apparatus comprises a duct 1, the ends of which can be fixed to the flanges 2 and 3 for attachment of the duct, for example, blocks of rough preliminary and subsequent fine purification of air. In one of the walls of the duct 1 slotted slits are inserted in the guides 5 are placed in movable cassettes with 4 filters. The device is provided with mechanisms for moving 7 4 cassettes, which are mechanically, for example, by means of rods 6 are connected with 4 cassettes. Before filters, placed in cassettes 4, in the flow of cleaned air sensors placed 8 the composition of the purified air, associated with the detector 10, which, in turn, is connected to the switch 9 associated with the mechanisms of movement of the cassettes 4.

The proposed device operates as follows. The flow of cleaned air supplied to the duct 1, is washed by the sensors 8, the number and designation which corresponds to the number and assignment of filters, placed in cassettes 4.

The detector 10 via communication channels (e.g., electric) transmits a signal of the presence of this pollutant and a component of the commutator 9, which compares the led�ranks of this signal with a preset reference value. If, for example, received from the detector 10, the signal on the content in the clean air of ammonia greater than a predetermined reference value, then from the switch 9 to the corresponding mechanism 7 moving the cassette 4 with a filter that cleans the air from ammonia, the command to turn on and the cassette 4 with this filter along the guide rails 5 to the inside of the duct 1. Filter purification from ammonia starts to work. If the ammonia content in the clean air will decrease below the permissible value, the signal from the detector 10 will be less than the specified reference value. In this case, the switch 9 will be served on the appropriate mechanism 7 moving the cassette 4 team on the reverse of displacement and will include this mechanism 7, which will eject the cassette 4 of the duct 1.

Thus, in the duct of the device in the process of air cleaning are only those of the cassette 4, which are filters that clean the air from pollution, the content of which exceeds the permissible value. In cases of changes in the composition of the air in the result, for example, accidental releases of hazardous substances at enterprises, increase in the concentration of exhaust gases of vehicles during peak hours, etc. of the cassette 4 with the filters you need at the moment, will be automatically be installed in a duct 1, and the rest of the magazine 4 auto�key to get out of it.

As a result, the resistance of the device to the flow of cleaned air in comparison with the prototype will decrease in the duct will be fewer 4 cassettes with filters. In addition, when changes in the composition of the purified air will dramatically reduce the time required to change tapes 4. All this will increase the productivity of the cleaning process. It will improve the quality of cleaning, since the replacement of the cassette with 4 filters will be automatically simultaneously with increasing concentration of the cleaned air pollution. Getting this contamination in purified air for periods prior to the discovery of new contaminants, disconnect the device and install the desired filter, as this can be the prototype, the proposed device is excluded. The concentration of impurities in the air, cleared the proposed device will always be within acceptable limits.

The proposed device can be manufactured and applied using means known in the art and materials. The housing 1, the flanges 2 and 3, the guides 5 and the cassette 4 can be made of known structural steels, aluminium alloys or plastic using known metal-cutting, welding and foundry equipment. As filters as in the prior art, can be applied, e.g.�measures the sorbents. So, for air purification from ammonia the same way as the prototype, you can apply the sorbent SAAF Carb MB consisting of activated carbon with the addition of contaminants, from chlorine to clean suitable sorbent SAAF Carb MC, which is based on a mixture of activated carbon with alumina. Can also be used mixtures of different sorbents. Filters, placed in cassettes 4 may be a mesh or plate thread waste from the threads, between which laid the sorbent, for example, in powder form. Thread nets or thread waste can be made of a material neutral to purify the air and polluting its components, for example, from polyurethane.

As mechanisms 7 move the cassettes 4 can be used reversible Electromechanical actuators. Thrust 6 connecting mechanisms 7 with cassettes 4 may be made rigid, for example, in the form of steel rods with eyelets for attaching them on cassettes 4 and in mechanisms 7. The switch 9 may be an electronic device that consists of a mixture of known locations of comparing the incoming signal with a preset reference value and generates a pulse to activate and reverse mechanisms 7 move 4 cassettes. Such schemes are widely used in automatic control systems of technological installations. Example �logit industrial switch series ISCOM21XXi (http://www.raisecom/su). The sensors 8 may be of a different design from among known in the art and are selected depending on the type of analyzer 10. For example, the sensors 8 can be formed as a funnel for the reception of air, United with the gas analyzer 10 of the pipeline. As the detector can be applied, for example, the universal automatic stationary gas analyzer GANK-4C NPO Pribor, Moscow, which provides control of content in the atmosphere 117 hazardous substances (http://www.gank4.ru). Thus, the proposed device achieves a technical effect, which consists in increasing the productivity of the process air purification and improving the quality of treatment, and can be manufactured and applied using known tools and materials. Therefore, the proposed device has industrial applicability.

The air purification device containing a duct, in which is sequentially inserted cassettes with filters designed for various pollutant gases, characterized in that before the filters in the flow of cleaned air installed sensors in the composition of air, United with the gas analyzer, which is connected with the switch, in one of the walls of the duct cut slits into which is inserted the guide rails are placed in them with opportunities�Yu move cassettes, containing filters, and guides fixed to the walls of the duct, cassette mechanically coupled to the mechanisms of their movement, which are connected to the switch, and to the ends of the duct flanges installed.



 

Same patents:

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The invention relates to techniques for filtering liquids and gases from the sediment and dust and can be used in the filtering elements of filters for various industries

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2 dwg

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2 dwg

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21 cl, 2 dwg, 2 ex

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EFFECT: increase of system functional possibilities, improvement of announcement about emergency situations.

13 cl, 2 dwg, 2 ex

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