RU2231367C2 - Air disinfecting method - Google Patents

Abstract

FIELD: equipment for disinfecting air in closed rooms, that is, in operating rooms, intensive therapy and infection wards, pharmacies, at space stations and other rooms.

SUBSTANCE: method involves providing filtration and pumping of air by means of fan through disinfecting chamber while exposing air to electromagnetic field at frequency of 100-4,000 MHz and volume density of power of 0.001-0.3 W/cm³. Disinfecting chamber is electrically closed.

EFFECT: increased efficiency of disinfecting room in the presence of people.

1 dwg, 1 tbl, 2 ex

Description

The invention relates to medicine, in particular to methods of disinfection, and can be used for disinfecting air in enclosed spaces, namely in operating rooms, intensive care units, infectious wards, pharmacies, space stations and other rooms where disinfection is necessary air in the presence of people.

A known method of disinfecting indoor air, disclosed in the description of the device for air purification in the room [1] and which consists in pre-filtering the air, pumping it through the disinfection chamber with a fan and irradiation with ultraviolet radiation. The disadvantages of using ultraviolet radiation for air disinfection include the low efficiency of irradiation of microorganisms in moving, saturated air, as well as the formation of toxic ozone and nitrogen oxides.

Also known is a method of sterilizing materials using microwave radiation with a high field strength and a device for its implementation [2], in which the medium is sterilized by a microwave source in the volume of a disinfection chamber for: killing microorganisms by direct heating. The disadvantage of this method is the limited scope of its use - it is intended for sterilization of materials in a closed disinfection chamber and does not allow to disinfect indoor air.

The task to which the creation of the proposed method is aimed is to provide the possibility of more effective disinfection of air in the room in the presence of people.

The essence of the proposed method of disinfecting indoor air in the presence of people is to filter and pump air through a disinfection chamber when exposed to an electromagnetic field with a frequency of 100-4000 MHz and a power density of 0.001-0.3 W / cm ³ . In this case, the disinfection chamber is electrically closed, that is, shielding the electromagnetic field.

Electromagnetic energy is absorbed by water, protein molecules, DNA and RNA polymers and lipoprotein complexes. As a result, they are heated and denatured (irreversible conformational changes) and the destruction of membrane structures and, as a result, the death of pathogens: bacteria, spores of fungi, viruses.

The energy of the electromagnetic field is completely enclosed in the volume of the disinfection chamber through which air is pumped. Disinfected air enters the room through openings in the chamber panel. With the help of a fan, air is pumped through an electrically closed disinfection chamber with mesh walls that exclude the electromagnetic field from leaving the disinfection chamber.

The drawing shows a diagram of a device that implements the proposed method.

The device includes a housing 1, inside which there is a disinfection chamber 2. In it, air is disinfected using an electromagnetic field with a frequency of 100-4000 MHz created by a magnetron 3. Electromagnetic radiation 4 is directed inside the disinfection chamber 2. A fan 5 is installed on the panel 6, which pumps air through the disinfection chamber 2. In panel 6 there are openings 7 through which the disinfected air again enters the room.

The method is as follows.

Turn on the device. In this case, fan 5 and magnetron 3 start working. Fan 5 pumps air through disinfection chamber 2, in which it is irradiated with electromagnetic field energy 4 from magnetron 3. As a result, the pumped air heats up, which leads to the death of bacteria, microbes, etc. Then disinfected air enters the room through openings 7 in the panel 6.

At the enterprise, the described device was tested that implements the proposed method of air disinfection. At the same time, the fan motor power was 40 W, and the rotation speed was 1000 rpm. The effectiveness of the method was checked by the degree of air purification, which was evaluated experimentally in the laboratory.

Example 1. Irradiation of a gaseous medium was carried out for 15 min at a power level of the energy of the electromagnetic field of 90 W (volumetric power density of 0.005 W / cm ³ ). General seeding decreased by 75%, mold spores were completely destroyed.

Example 2. At an electromagnetic field energy power level of 600 W (power bulk density 0.033 W / cm ³ ) and an irradiation time of 30 minutes, 7% of bacterial colonies remained, while the efficiency of disinfection of the gas medium was 93%.

In the above examples, during air disinfection, mold spores were completely destroyed. The effectiveness of air disinfection was measured by its bacterial contamination in the control experiment (untreated air) and after irradiation. The results are shown in the table.

Thus, the application of the proposed method of disinfection of air in the room reduces the bacterial contamination of the air, increases the efficiency of air purification during safe operation in the room.

Sources of information

1. RF patent No. 2121629 C1, cl. F 24 F 3/16, publ. 11/10/98.

2. RF patent No. 2161505 C1, cl. A 61 L 9/00, 2/12, 2/08, publ. 01/10/01.

Claims (1)

The method of disinfecting indoor air by filtering and pumping air through a fan through a disinfection chamber when exposed to an electromagnetic field, characterized in that they use an electromagnetic field with a frequency of 100-4000 MHz and a volumetric power density of 0.001-0.3 W / cm ³ , and the specified the disinfection chamber is electrically closed.