Method of evaluating elimination of microoganisms and apparatus for evaluating elimination of microorganisms

Abstract

The sterilizing effect of particle irradiation on microorganisms for the sterilizing treatment thereof can be evaluated. The evaluation can be done by supplying microorganisms in the space inside a container (8), allowing particles (7) for the sterilizing treatment of microorganisms to irradiate the microorganisms, sampling the microorganisms by a sampling means (6) after the irradiation of the particles (7) and measuring the sampled microorganisms. The microorganisms as the subject for the sterilizing treatment can be a combination of one or more members selected from the group consisting of bacteria, mycete, viruses and allergens. As the particles, for example, positive ions, negative ions, and gases of positive ions and negative ions in mixture, charged particles such as α rays and β rays, various plasma gas particles, particles such as ozone and radical particles, and particles of chemical agent can be used.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for evaluating elimination of microorganisms so as to evaluate the sterilizing effect on microorganisms suspended in atmosphere and an apparatus for evaluating elimination of microorganisms. BACKGROUND ART [0002] Due to the highly airtight structure in living environment, a demand toward the elimination of microorganisms being suspended in air and hazardous for humans so as to have healthy and cozy life has increasingly grown. So as to satisfy the demand, filters with various antimicrobial agents attached thereon have been developed in recent years. [0003] Because these filters are of a method to aspirate spatial air of space to filter off atmospheric microorganisms, however, these filters should essentially be maintained during long-term use, for example, by a filter exchange. Additionally, the performance of these filters is insufficient. Therefore, satisfactory performance has not yet been achieved. The method is in...

AI Technical Summary

Benefits of technology

[0013] For measuring the sampled microorganisms, measuring the timewise change of the microorganisms can be measured in an irradiation time period of the particles, thereby making it possible to quantitatively evaluate the sterilizing performance over time.

[0014] For measuring the sampled microorganisms, the dependency of the elimination performance on the particles concentration can be measured, thereby making it possible to quantitatively evaluate the dependency of the sterilizing performance on the concentration of the particles.

[0021] When these ions are generated, hydrogen peroxide H2O2 or radical OH as active species are generated by chemical reactions. Because the H2O2 or the radical OH has an extremely strong activity, microorganisms suspended in air can be subjected to sterilizing treatment and eliminated.

[0028] A specific embodiment of the apparatus for evaluating elimination of microorganisms can be constituted such that the microorganism supply means, the microorganism elimination means and the microorganism sampling means are sequentially arranged on the passage of air containing microorganisms, from the upstream side toward the downstream side thereof. In such manner, a series of processes comprising supplying microorganisms, elimination of microorganisms and sampling microorganisms can be carried out smoothly.

[0030] Further, a construction is preferable such that the microorganism elimination means and the microorganism sampling means are arranged outside the vertically downward region of the microorganism supply means. Because particulate substances not prepared in a gaseous form in a mist discharged from the microorganism supply means fall in the vertically downward region and its peripheral regions, the microorganism elimination means and the microorganism sampling means are not contaminated with the fallen substances owing to such construction, so that the reliability of the evaluation apparatus can be improved. So as to attain the effect, importantly, the microorganism elimination means and the microorganism sampling means should not be arranged vertically downward the microorganism supply means. By arranging the microorganism supply means and the microorganism sampling means in the horizontal direction or by arranging both the microorganism elimination means and the microorganism sampling means in a position slightly shifted from the vertically downward position of the microorganism supply means or in a direction oblique to the direction of the microorganism supply means, for example, the effect can be gained.

[0031] In accordance with the invention, further, an apparatus for evaluating elimination of microorganisms can be used, where a separate container so as to cover the container is arranged outside the container. Due to such construction of the apparatus, microorganisms leaking from the container or particulate substances not prepared in a gaseous form can be shielded with the separate container, so that such microorganisms or such particulate substances hardly leak outside.

Problems solved by technology

Additionally, the performance of these filters is insufficient.

Therefore, satisfactory performance has not yet been achieved.

The method is insufficient as the method for eliminating microorganisms.

However, the concentration of microorganisms, which are subjected to be measured, suspended in air cannot be measured.

However, it has not yet been carried out to measure and evaluate the performance of eliminating microorganisms with the sterilizing treatment of microorganisms utilizing the method.

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