JP2021171604A - Space sterilization machine - Google Patents

Abstract

To provide a sterilization unit capable of achieving sterilization of bacteria and virus in the air, by using a 265 nm UV LED, and being used for an interior space of a hall or the like.SOLUTION: Many 265 nm UV LED modules 7 are arranged in a sterilization unit for acquiring sufficient radiation time in a sterilization unit, and a structure (labyrinth channel) in which air reciprocates so as to fold an air channel, is provided, in a sterilization unit. Therefore, a distance from a light source can be reduced, and by extension of time required for passage through the channel, sufficient radiation time can be acquired at one time.SELECTED DRAWING: Figure 4

Description

The present invention relates to a mechanism of an air conditioner for the purpose of sterilizing and sterilizing bacteria and viruses in large and small indoor air.

Direct sterilization of bacteria and viruses in the air by irradiation with ultraviolet rays ^{of 7.5 J / m 2} or more near the wavelength of 260 nm, sterilization and inactivation of bacteria and viruses by titanium dioxide photocatalytic reaction.

D value of virus in air (sterilization dose at 90% sterilization rate J / m2) * 7.5J / m2 * Lewis R. Koller: Ultraviolet Radiation (1952)

Only titanium dioxide (TiO_). The photocatalyst absorbs the ultraviolet rays of the sun and fluorescent lamps, the energy of the ultraviolet rays is absorbed, the electrons are activated, and the electrons are ejected from the surface. The holes from which the electrons have escaped are called holes and are positively charged. Holes (possive holes (h_)) have a strong oxidizing power, take electrons from OH_ (hydroxyl ions) in water, form negative radicals (e_), and are highly reactive superoxide anions (0_ + e_). → O__) and hydroxyl radicals (OH_ + h_ → · OH) are said to occur. This causes a powerful oxidative reaction that robs the other party of electrons and decomposes organic substances such as unpleasant odors, viruses, and pathogens. Since OH radical has a strong oxidizing power, it robs nearby organic matter of electrons and tries to stabilize itself. The organic matter deprived of electrons in this way breaks the bond and eventually becomes carbon dioxide or water, which is released into the atmosphere. Based on this principle, active substances are generated from oxygen and water, and odorous substances, bacteria, viruses, etc. are oxidatively decomposed to exhibit antibacterial and deodorant effects and detoxify them. * Quarterly "Clinical and Virus" of the Japanese Society of Virology Vol. 39 / No. The paper "Infectivity and inactivation of influenza aerosol" by Professor Kimiyasu Shiraki et al., Faculty of Medicine and Pharmaceutical Sciences, University of Toyama, published in 5.

There have been devices for the secondary purpose of air purification to sterilize bacteria and viruses with ultraviolet rays. However, they were limited to small indoor use, and effective UV irradiation in the air was limited. In particular, in order to avoid adverse effects on the human body, the irradiation is limited to ultraviolet rays inside the machine where the external exposure is as small as possible, and in that case, it is a big problem that the irradiation time that produces a sufficient effect cannot be obtained.

Means for the invention to be solved

In order to solve this problem, the first invention invented a special sterilization unit. This is called a labyrinth channel. The second invention is a device whose main purpose is to sterilize and sterilize bacteria and viruses in the air on a commercial hall scale using this sterilization unit. This is called a space sterilizer.

Sterilization unit (labyrinth channel)
^* Irradiation time can be secured by passing through an air passage that is shaped to fold the air introduced to solve this problem. ^{As a result, a sufficient length of *} irradiation time can be given when passing through the partition panel in which a plurality of 265 nm ultraviolet LEDs are installed, and an effective bactericidal effect can be obtained by shortening the irradiation distance. Be done. In addition, the equipment can be compactly integrated. Furthermore, titanium dioxide is coated on the inner surface of the passage, and it can strongly act to detoxify bacteria and viruses by the direct bactericidal effect by ultraviolet rays and the strong oxidation reaction of OH radicals generated by the photocatalytic reaction. Here, in order not to generate noise due to vibration of the panel in the passage passing at high speed, a resin material is used as a cushion material inside the partition, or the partition panel material is made of vibration-resistant titanium and titanium alloy material. Etc. used. 2, FIG. 3, FIG. 4, and FIG.
* Irradiation time 90% sterilization rate of virus in air D value = 7.5J / m ²
Sterilization line Illuminance E (W / m ² ) and irradiation time t (seconds) product [sterilization dose (J / m ² )]
Illuminance E = light output (W) / distance d (m) ²
265nm UV LED light output 50mW
Labyrinth channel inner wall surface spacing <0.1m (height 1.5m, width 1.2m, depth 0.9m)
From the above, the required value of the irradiation time (t) satisfying the D value 7.5 is calculated to be 1.5 seconds.
(Actually, there are irradiations from multiple light sources, and the distance is set to the maximum value, so more than sufficient effects can be expected.)

The effect of the space sterilizer labyrinth channel enables efficient and large capacity, and can sterilize and sterilize bacteria and viruses in the air on a large hall scale. The structure takes in air from the front, filters it and then introduces it into the labyrinth channel. Inside, a fan is rotated by a motor controlled by an inverter to maintain a wind speed that is effective, and the processed air is discharged from the top. Figure 1

The invention's effect

The space sterilizer, which is the second invention incorporating the first invention, can kill or inactivate 90% or more of the viruses in the introduced air by a sufficient ultraviolet irradiation effect and photocatalytic effect. By using this continuously, the air in the hall can be changed to a safe one.

The perspective view (front view, side view) which shows one Embodiment of the space sterilizer of this invention. Perspective view (front view, side view) showing the sterilization unit (labyrinth channel) of the present invention. The figure which shows the flow path of the air in a sterilization unit (labyrinth channel). Perspective view showing the arrangement of 265 nm UV LED modules in the inner panel part of the sterilization unit (labyrinth channel) (overall perspective view, panel enlarged view) The figure which shows the arrangement of the 265nm UV LED module in the sterilization unit (labyrinth channel), the vibration damping material, and the electric wiring (the whole perspective view, the enlarged view).

An embodiment of the space sterilizer of the present invention is shown in FIG.
The air taken in from the front part of the main body is introduced into the sterilization unit (labyrinth channel) after passing through the filter, and after sterilizing and sterilizing bacteria and viruses, it is discharged from the upper outlet.
Moreover, one embodiment of the sterilization unit (labyrinth channel) is shown in FIG.
A large number of 265 nm UV LED modules are arranged inside the sterilization unit, and the inside is coated with titanium dioxide. This embodiment is shown in FIGS. 3, 4, and 5.

1 Sterilization unit (labyrinth channel)
2 HEPA filter 3 Motor 4 Inverter / control unit 5 Fan 6 Air inlet 7 265nm UV LED module 8 Air outlet 9 Titanium dioxide coating 10 Electrical wiring 11 Vibration damping resin

Claims (2)

A sterilization unit (labyrinth channel) that passes through a flow path that allows the introduced air to fold, irradiates with a large number of 265 nm UV LEDs installed in the flow path, and performs a sterilization process with titanium dioxide coated on the inner surface. An air-conditioning device (space sterilizer) equipped with the sterilization unit (labyrinth channel) of claim 1 for the purpose of sterilizing and sterilizing bacteria and viruses in the space with an electric fan.

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