KR20200022941A - mathod and apparatus for vaporizing sterilant to disinfecting air - Google Patents

Abstract

The present invention relates to an air disinfection method which comprises the following steps: spraying liquid droplets using a liquid injection hole at the center of a front end portion of a nozzle body, a plurality of gas injection holes disposed at a predetermined distance from each other by being opened to be inclined toward the front end of the liquid injection hole while being opened to a direction touching a front end edge of the liquid injection hole, and a device having a hot air outlet opened to be parallel with the liquid injection hole while surrounding the liquid injection hole to evaporate air disinfecting chemical liquid; splitting the liquid droplets into micro-scales by allowing the same to collide compressed air; splitting the spilt liquid droplets into molecular size by evaporating the same by contact with hot air; and brining the steam particles split into the molecular size into contact with each other and condensing and coagulating the same by allowing steam particles to be in contact with air in a space to be disinfected so as to make the steam particles into nano size.

Description

Method and apparatus for vaporizing a chemical solution for air disinfection to disinfect air {mathod and apparatus for vaporizing sterilant to disinfecting air}

The present invention relates to a method and apparatus for evaporating an air disinfection chemical liquid for disinfecting air, and more particularly, an air stream ejected through a gas ejection outlet provided with a liquid-pillar-shaped liquid ejected from the liquid ejection outlet. The present invention relates to a method and apparatus for finely pulverizing liquid granules into fine granulated liquid particles, and enclosing the fine granulated liquid granules in hot air to evaporate them into ultra fine liquid granules.

In the summer of 2015, a MERS-infected patient visited several hospitals in South Korea, killing dozens of people who were infected with the MERS virus.

To solve this problem, the hospital was quarantined for the infected patients and suspected infections, but could not prevent the MERS outbreak early.

This is because the MERS virus from MERS infected patients penetrated the respiratory tract of many people through air or through a ventilator installed in a hospital.

Therefore, there is a trend to focus on the air sterilization device that can sterilize the infected space quickly.

In the past, space sterilization has been carried out using ethylene oxide gas (EO gas) with a low boiling point (10 ^o C), but this substance has been found to be a primary carcinogen and can no longer be used.

In addition, this method is not applicable to the difficult ventilation space because the ethylene oxide gas used for disinfection must be discharged to the outside.

The solution to this problem is hydrogen peroxide. Hydrogen peroxide water is bactericidal, and low concentration, that is, 0.01% by weight to 0.10% by weight of hydrogen peroxide water is used to disinfect the packaged product of medicines.

Disinfection with evaporated hydrogen peroxide It is common to use gaseous hydrogen peroxide of 100 to 700 ppm, in which case it is known that disinfection time of 30 minutes to 4 hours is required at 80 ° C or lower.

Since hydrogen peroxide water is a mixture of hydrogen peroxide and water, and the boiling point of hydrogen peroxide is 150 degreeC, the method of rapidly vaporizing a small amount of this mixture on the surface of a high temperature previously was mainly used.

This performance has a problem in that a large amount of disinfection is required because it must be added to the hot surface at an injection rate of 5 grams per minute / per injection opening, and there is a problem that the vaporized hydrogen peroxide water is condensed on the sterilized article or surface.

There is therefore a need for a device that produces large amounts of hydrogen peroxide vapor at concentrations that do not condense on the article or surface to be sterilized.

Such air disinfection devices are disclosed in Patent Registration Nos. 10-1633274 and 10-1633272, filed by the present inventors.

The disclosed air sterilizing apparatus includes a two-fluid nozzle that atomizes and injects a chemical liquid by compressed air at a focal point disposed in the center of the chamber, and induces hot air to vortex to contact the chemical liquid injected from the two-fluid nozzle to evaporate the chemical liquid. A heating vortex forming unit is included.

However, in the disclosed air sterilizing apparatus, the plurality of air nozzles disposed in the chamber are enlarged in the tubular part of the heating vortex forming part to contact the tubular part in order to focus on the central focus in the chamber. Since the size is enlarged, the overall size of the air disinfection device is increased, thereby increasing the manufacturing cost and increasing the installation footprint.

In addition, since the plurality of air nozzles are focused on the central axis of the chemical liquid ejection port, the horizontal component of the ejection power of the chemical liquid ejected from the chemical liquid ejection port is injected into the plurality of air nozzles. The air disinfection device disclosed above has a problem that it is attenuated by the chemical liquid and does not scatter far.

In addition, the disclosed air disinfection device has a problem in that when the chemical liquid of the microfluidic nozzle is not made by spraying, the chemical liquid may have a large micro size even when it is in contact with the hot air and thus may not spread far into the space to be disinfected.

The present invention solves the problems posed above, that is, the size of the evaporation chamber constituting the product is enlarged to increase the size of the air sterilizing device and the problem that the injected sterilizing disinfectant is condensed by contacting other parts of the air sterilizing device. It is for

The present invention comprises the steps of: spraying the droplets, the step of colliding the droplets with compressed air to a micro size, the step of contacting the split droplets by hot air to evaporate to evaporate to molecular size, vapor evaporated to molecular size The problem can be solved by providing an air disinfection method comprising contacting each other with air in a space to be disinfected while condensing and condensing the particles into nano-sized particles.

In addition, the present invention is to be inclined toward the distal end of the liquid ejection opening, the liquid ejection opening in the center of the front end of the nozzle body in order to implement the air disinfection method is opened in a direction that is in contact with the front edge of the liquid ejection outlet is arranged at a predetermined distance from each other The above problem can be solved by providing an air disinfection device provided with a plurality of gas ejection openings and a hot air ejection opening opened in parallel with the liquid ejection opening in a state surrounding the gas ejection opening.

According to the present invention, a plurality of droplets located at the rim portion of the droplet group generated by being ejected from the liquid ejection outlet installed inside the gas ejection port is pulverized by the air flow ejected from the gas ejection outlet into a micro-sized droplet The plurality of droplets located at the edge portion are discharged farther in front of the liquid outlet, while the horizontal components of the plurality of droplets located at the edge portion are canceled by the airflow and do not spread around the liquid outlet. Swirled and scattered to a space to be sterilized farther than before, and the droplets in the central portion of the droplet group are sprayed as they are, without being obstructed by the airflow ejected from the gas outlet, and then placed on the rim. Plural drops and droplets in the center Evaporated by a large amount of hot air produced by induction heating, it becomes finer molecular-sized vapors and spreads to the space to be disinfected, and the molecular-sized vapor particles that are blown into the air contact each other or air in the space to be disinfected. Condensation (condensation) to coagulation (coagulation) to the nano-size to continue to spread through the air, the possibility of contact with pathogens attached to the air or the surface of the room increases the efficiency of disinfection.

1 is a combined perspective view showing an apparatus for evaporating an air disinfection chemical liquid in an embodiment of the present invention,
Figure 2 is an exploded perspective view showing the device for evaporating the air disinfection chemical of Figure 1,
3 is a cross-sectional view taken on the line AA of FIG.
4 is an enlarged cross-sectional view of the distal end of the injection nozzle unit of FIG. 3;
5 is a plan view showing the gas discharge port and the nozzle tip of the injection nozzle unit of FIG.
FIG. 6 is a schematic diagram illustrating a phenomenon in which droplets having a micro size are evaporated by hot air in the injection nozzle unit of FIG. 1, and
7 is a schematic diagram showing a procedure in which droplets are split into nano-scales for air disinfection.

Hereinafter, a method for evaporating the air disinfection chemical liquid of the embodiment according to the present invention, that is, the air disinfection method will be described in detail with reference to FIG. 7.

In the air disinfection method of the present embodiment, as shown in Figure 7, the step of spraying a chemical solution for air disinfection into a droplet, the step of hitting the droplets in compressed air to split the micro size, the split chemical liquid in contact with hot air Step of evaporation to split into molecular sizes, and the step of contacting the vapor particles split into molecular sizes into contact with the air of the space to be sterilized, condensing and condensing them into nano-sized.

According to the air disinfection method, the spray droplets are split into micro size, spread into the air and then split again by hot air to become vapor particles of molecular size, and then continue to spread through the air, in contact with each other or with air in the space to be disinfected. Condensation and condensation, which are nano-sized, increase the possibility of contact with various microorganisms scattered in the air or attached to the surface of the room, thereby increasing the efficiency of disinfection.

Hereinafter, the device for evaporating the air disinfection chemical liquid for implementing the air disinfection method according to the present invention will be described in detail with reference to FIGS.

The apparatus for evaporating the air disinfection chemical liquid, as shown in Figure 1, the injection nozzle unit 100 mounted to the tip of the hot air supply pipe 200 so that hot air can be discharged out of the tip of the hot air supply pipe 200 It includes. Therefore, the tip of the hot air supply pipe 200 has a portion other than the portion occupied by the spray nozzle part 100.

As shown in FIG. 2, the injection nozzle unit 100 extends in a radial direction of the hot air supply pipe 200 while providing a space in which the hot air discharged from the hot air supply pipe 200 may be discharged. Body 110 mounted to the hot air supply pipe 200; A first tubular portion 120 having a lower portion inserted and inserted into a bore 103 formed at the center of the upper surface of the body 110; The lower part is inserted into the bore 103 in a state of being external to the upper half of the first tubular part 120 and detachable from the second tubular part 130 and the hot air supply pipe 200 that are mounted to the body 110. It is inscribed to the outside and is external to the upper portion of the second tubular portion 130 includes a grill 140 to prevent the entry of solid foreign matter into the hot air supply pipe (200).

3 and 4, the body 110 is connected to a sheet portion 104 formed at the upper edge of the bore 103, a chemical supply source (not shown) and the bottom center of the bore 103. And a chemical air inflow path 102 having an outlet 102a formed therein, and a compressed air inflow path 101 connected to a compressed air source (not shown) and having an outlet 101a formed in a wall portion of the bore 103.

As shown in FIGS. 3 and 4, the first tubular portion 120 extends over the entire length of the first tubular portion 120 to flow to the outlet 102a of the chemical inflow passage 102 formed at the bottom of the bore 103. An inner tubular wall portion 121 defining a chemical liquid passage 121a; A lower enlarged part 122 seated on the bottom of the bore 103 and protruding from the inner tubular wall part 121 in the radially outward direction of the chemical liquid passage 121; An upper enlarged portion 123 disposed to be exposed upward from the bore 103 and protruding radially outwardly of the chemical liquid passage 121a from the inner tubular wall portion 121; A second bore 124 formed at the center of the upper enlarged portion 123; A chemical liquid nozzle tip 125 protruding upward from the bottom center of the second bore 124 and circulating in the chemical liquid passage 121a; The upper diameter-expansion portion 123 is inclined toward the distal end of the chemical liquid nozzle tip 125 and inclined toward one side in the circumferential direction of the chemical liquid exposure tip 125 so that the central axis does not cross the central axis of the chemical liquid nozzle tip 125. A plurality of gas discharge ports 126 extending through the bottom of the second bore 124 and formed to have the same phase difference in the circumferential direction of the chemical nozzle tip 125; The lower diameter portion 122 and the upper diameter portion 123 is spaced apart in the axial direction of the chemical nozzle tip 125 is disposed between the lower diameter portion 122 and the upper diameter portion 123 and the A plurality of lower intermediate protrusion pieces 127 projecting in a radially outward direction of the chemical liquid passage 121a and spaced apart at a predetermined interval in the circumferential direction of the chemical liquid passage 121a; The upper diameter portion 123 and the plurality of lower intermediate torsion pieces 127 are spaced apart in the axial direction of the chemical nozzle tip 125 so that the upper expansion part 123 and the plurality of lower intermediate torsion pieces 127 are provided. Disposed between and projected in the radially outward direction of the chemical liquid passage 121a to be spaced apart at regular intervals in the circumferential direction of the chemical liquid passage 121a, and the chemical liquid nozzle with respect to the plurality of lower intermediate torsion pieces 127. A plurality of upper middle protrusion pieces 128 arranged at different phase differences in the circumferential direction of the tip 125; And a ring shape that is fixed to an upper surface of the lower enlarged portion 122 and the inner tubular wall portion 121 and has an outer diameter smaller than the outer diameter of the lower enlarged portion 122 and protrudes in a radially outward direction of the chemical liquid passage 121a. The spacer 129 is integrally included.

The second tubular portion 130 is external to the plurality of upper middle protrusion pieces 128, the plurality of lower middle protrusion pieces 127, the upper enlarged part 123, and the spacer 129. An outer tubular wall portion 132 forming a zigzag gas passage 131 circulating to the plurality of gas discharge ports 126 in cooperation with the wall portion defining a second bore 124 of the upper enlarged portion 123. The outer tubular shape to be seated on the shaft diameter portion 133 protruding radially inwardly of the chemical liquid passage 121a, the seat portion 122a formed by the spacer 129 and the lower diameter expansion portion 122 to be seated on the upper surface The lower flange 134 protruding in the radially outward direction of the liquid passage 121a from the lower portion of the wall portion 132 and the seat portion 104 formed on the upper surface of the wall portion to form the bore 103 is fastened and fastened. Is disposed between the upper flange 135, the lower flange 134 and the upper flange 135 For example, the rice 136 and the rice passage 131 protruding radially outwardly of the liquid passage 121a and the gas passage 131 to the outlet 101a of the compressed air passage 101 and The outlet port 137 is formed integrally between the lower flange 134, the portion of the outer tubular wall portion 132.

The gas passage 131 of the zigzag serves to make the pressures of the gases ejected from the plurality of gas discharge ports 1126 uniform with each other.

The through hole 141 is formed in the center of the grill 140 to allow the upper portion of the second tubular portion 130 to penetrate, and the bottom surface 142 of the wall portion defining the through hole is the upper flange 135. ) To prevent the second tubular portion 130 from being separated out of the hot air supply pipe 200.

In the apparatus for evaporating the air disinfection chemical liquid configured as described above, as shown in Figure 5, the air flow of the compressed air discharged from the plurality of inclined gas discharge port 126 of the chemical liquid injected from the chemical nozzle tip 125 Comb the rim part of the droplet group in one direction in the circumferential direction to generate a vortex in the droplet of the chemical liquid to scatter to a space to be sterilized farther than before, and the horizontal force component of the droplet group of the chemical liquid is The impact of the chemical liquid nozzle tip 125 is prevented by momentarily colliding with the vertical force component to crush the droplet group of chemical liquids and spraying with the chemical liquid droplets of micro size so as not to spread around the chemical liquid nozzle tip 125. To be ejected farther to the front, and then the droplets of the edge portion of the droplet group of the chemical liquid and the droplets of the central portion of the droplet group to the hot air supply pipe (200) Surrounded by the supplied hot air and evaporated as shown in FIG. 6, it is blown out into the space to be disinfected, and the molecular size vapor particles spreading into the air are condensed and condensed by contacting each other or with air in the space to be disinfected. As it is nano-sized, it continues to spread through the air, increasing the possibility of contact with fine particles present in the air or attached to various surfaces of the room, thereby increasing the efficiency of disinfection.

In addition, nano-sized vapors that are blown into the air of the space to be condensed and condensed and condensed to nano size are no longer condensed or condensed, thereby preventing condensation and falling to the bottom during spraying to the maximum.

The reason is that the nano-sized steam is positioned in the atmosphere of hot air injected from the hot air supply pipe 200, and the process of dynamically evaporating or condensing or condensing the water by being heated by the hot air repeatedly occurs repeatedly. This is because the condensation is prevented by changing into the vapor of the nanoparticles as a whole.

As a result, the device for evaporating the air disinfection chemical solution can increase the disinfection treatment efficiency by increasing the possibility that more nano-sized vapor of the chemical liquid comes into contact with the microorganisms attached to the air or the surface of the room from all directions.

For example, if a 5 micrometer grain of liquid is transformed into a 100 nanometer uniform vapor, all are made up of 125,000 steams, which surround the surface of the target microorganism tightly and mess up the various functional structures on that surface. By making it, the microbes can be killed completely.

In addition, the apparatus for evaporating the air disinfecting chemical liquid of the embodiment, as shown in Figure 2, in order to further atomize the chemical liquid, further provided with a plurality of spiral wings 150 at the tip of the hot air supply pipe (200) Doing.

The two spiral wing portions of the plurality of spiral wing portions 150 in a radially inner end of two spiral wing portions 150a facing radially are fixed to both side walls of the body 110. The radially outer end of 150a is in contact with the inner wall of the hot air supply pipe 200, and the other two spiral wings 150b of the plurality of cords spirally facing each other in the radial direction. With the upper end fixed to the bottom surface of the body 110, the radially outer ends of the remaining two spiral wings 150b are in contact with the inner wall of the hot air supply pipe 200.

The plurality of spiral blades 150 make the hot air vortex, so that the chemical liquid atomized by the impact of the compressed air is surrounded in the hot air vortex, so that the micronized chemical liquid, as shown in Figure 6 Effectively evaporated to form molecules of sterile agents. Through this process, the particulated particles are scattered away from the injection nozzle unit 100 by riding the hot air vortex, thereby increasing the contact time with the hot air vortex, and condensing to a nano size during spraying. It is preferable from the viewpoint that it can be prevented even more.

100: injection nozzle unit, 200: hot air generating tube

Claims (9)

Spraying the air disinfection chemical solution into the droplets,
Breaking the droplets into compressed air and splitting the droplets into micro sizes,
Contacting the split droplets with hot air and evaporating to split them into molecular sizes, and
A method of evaporating an air disinfection chemical liquid for disinfecting air, comprising the steps of contacting each other with the molecular size of the steam particles in contact with the air of the space to be disinfected to condense and condensate. In the apparatus for evaporating the air disinfection chemical liquid for disinfecting the air provided with a spray nozzle unit 100 mounted to the tip of the hot air supply pipe 200 so that hot air can be discharged out of the tip of the hot air supply pipe 200,
The injection nozzle unit 110,
A body 110 which provides a space in which the hot air discharged from the hot air supply pipe 200 can be discharged and extends in a radial direction of the hot air supply pipe 200 so that both ends are mounted to the hot air supply pipe 200;
A first tubular portion 120 having a lower portion inserted into a bore 103 formed at the center of the upper surface of the body 110 and having a chemical liquid passage 121a connected to a chemical liquid supply source;
A lower portion of the first tubular portion 120 is externally inserted into the bore 103 and mounted to the body 110 to cooperate with the first tubular portion 120 to be connected to a compressed air source. A second tubular portion 130 defining a gas passage 131; And
And a grill 140 detachably inscribed in the hot air supply pipe 200 and external to the upper portion of the second tubular part 130 to prevent solid foreign matter from flowing into the hot air supply pipe 200.
In the center of the front end of the first tubular portion 120 is provided a chemical liquid nozzle tip (125) flowing with the chemical liquid passage (121a), the first tubular portion (radially outwardly adjacent to the chemical liquid nozzle tip 125) A device for evaporating the air disinfecting chemical liquid for disinfecting the air, characterized in that the front end of the 120 is provided with a plurality of gas discharge port 126 to pass through the gas passage (131). The method of claim 2,
The plurality of gas discharge ports 126 are inclined toward the distal end of the chemical liquid nozzle tip 125 so that the central axis does not intersect the central axis of the chemical liquid nozzle tip 125, and the one side in the circumferential direction of the chemical liquid tip 125. Inclined to each other, and arranged with the same phase difference in the circumferential direction of the chemical liquid nozzle tip 125, and the air stream discharged from the plurality of gas discharge ports 126 is sprayed from the chemical liquid nozzle tip 125 Apparatus for evaporating the chemical solution for air disinfection to sterilize the air, characterized in that the vortex generated in the chemical liquid column of the chemical liquid by combing the part in the circumferential direction of the chemical liquid column. The method according to claim 2 or 3,
The gas passage 131,
The gas passage 131,
A plurality of lower intermediate protrusion pieces 127 protruding from the first tubular part 120 in a radially outward direction of the chemical liquid passage 121a and spaced apart at a predetermined interval in the circumferential direction of the chemical liquid passage 121a; And
The plurality of lower intermediate torsion pieces 127 are spaced apart in the axial direction of the chemical liquid nozzle tip 125 and protrude in a radially outward direction of the chemical liquid passage 121a to be spaced in a circumferential direction of the chemical liquid passage 121a. But apart from the, characterized in that the plurality of upper intermediate protrusions 128 are disposed with a different phase difference in the circumferential direction of the chemical nozzle tip 125 with respect to the plurality of lower intermediate torsion pieces 127 is interposed. Evaporating air disinfection chemicals to disinfect air. The method of claim 4, wherein
At the tip of the hot air supply pipe 200 for air disinfection to disinfect air, characterized in that a plurality of spiral blades 150 of the line is interposed between the injection nozzle unit 100 and the hot air supply pipe 200. Device for evaporating chemical liquids. The method according to claim 2 or 3,
The body 110,
It is connected to the sheet portion 104 formed on the upper edge of the bore 103, the chemical liquid supply source, and the chemical liquid inflow path 102, the outlet 102a is formed at the bottom center of the bore 103, and the compressed air source It includes a compressed air inlet passage 101, the outlet 101a is formed in the wall portion of the bore 103,
The first tubular portion 120,
An inner tubular wall portion 121 for partitioning a chemical liquid passage 121a formed to extend over an entire length of the bottom of the bore 103 to flow through the outlet 102a of the chemical liquid inflow passage 102;
A lower enlarged part 122 seated on the bottom of the bore 103 and protruding from the inner tubular wall part 121 in the radially outward direction of the chemical liquid passage 121;
An upper enlarged portion 123 disposed to be exposed upward from the bore 103 and protruding radially outwardly of the chemical liquid passage 121a from the inner tubular wall portion 121;
A second bore 124 formed at the center of the upper enlarged portion 123; A chemical liquid nozzle tip 125 protruding upward from the bottom center of the second bore 124 and circulating in the chemical liquid passage 121a;
The upper diameter-expansion portion 123 is inclined toward the distal end of the chemical liquid nozzle tip 125 and inclined toward one side in the circumferential direction of the chemical liquid exposure tip 125 so that the central axis does not cross the central axis of the chemical liquid nozzle tip 125. A plurality of gas discharge ports 126 extending through the bottom of the second bore 124 and formed to have the same phase difference in the circumferential direction of the chemical nozzle tip 125;
The lower diameter portion 122 and the upper diameter portion 123 is spaced apart in the axial direction of the chemical nozzle tip 125 is disposed between the lower diameter portion 122 and the upper diameter portion 123 and the A plurality of lower intermediate protrusion pieces 127 projecting in a radially outward direction of the chemical liquid passage 121a and spaced apart at a predetermined interval in the circumferential direction of the chemical liquid passage 121a;
The upper diameter portion 123 and the plurality of lower intermediate torsion pieces 127 are spaced apart in the axial direction of the chemical nozzle tip 125 so that the upper expansion part 123 and the plurality of lower intermediate torsion pieces 127 are provided. Disposed between and projected in the radially outward direction of the chemical liquid passage 121a to be spaced apart at regular intervals in the circumferential direction of the chemical liquid passage 121a, and the chemical liquid nozzle with respect to the plurality of lower intermediate torsion pieces 127. A plurality of upper middle protrusion pieces 128 arranged at different phase differences in the circumferential direction of the tip 125; And
Ring-shaped protruding in the radial direction of the chemical liquid passage (121a) having an outer diameter smaller than the outer diameter of the lower enlarged portion 122 and fixed to the upper surface and the inner tubular wall portion 121 of the lower enlarged portion 122 Apparatus for evaporating the chemical liquid for air disinfection, characterized in that it comprises a spacer (129) integrally. The method of claim 6,
The second tubular portion 130,
The plurality of upper middle protrusion pieces 128, the plurality of lower middle protrusion pieces 127, the upper enlarged part 123, and the spacer 129 are circumscribed and cooperate with the plurality of gas discharge holes 126. Outer tubular wall portion 132 forming a zigzag gas passage 131 to be distributed to,
A shaft diameter portion 133 protruding inward in the radial direction of the chemical liquid passage 121a to be seated on the upper surface of the wall portion defining the second bore 124 of the upper diameter expansion portion 123,
A lower flange protruding in the radially outward direction of the liquid passage 121a from the lower portion of the outer tubular wall portion 132 to be seated by the seat portion 122a formed by the spacer 129 and the lower enlarged portion 122. 134),
An upper flange 135 seated on and fixed to the seat 104 formed on the upper surface of the wall constituting the bore 103;
A strong rice portion 136 disposed between the lower flange 134 and the upper flange 135 to protrude in a radially outward direction of the liquid passage 121a;
Distribution formed in the portion of the outer tubular wall portion 132 between the strong rice part 136 and the lower flange 134 to distribute the gas passage 131 to the outlet 101a of the compressed air flow path 101. Apparatus for evaporating the air disinfection chemical liquid to sterilize the air, characterized in that it comprises a sphere (137) integrally. The method of claim 7, wherein
Further provided with a plurality of spiral blades 150 of the row at the front end of the hot air supply pipe 200,
The two spirals in the radially proximal ends of the two spiral wings 150a facing each other in a radial direction among the plurality of spiral wings 150 are fixed to both side walls of the body 110. The radially outer end of the wing portion 150a is in contact with the inner wall of the hot air supply pipe 200, and the remaining two spiral wing portions 150b facing radially among the plurality of helical wing portions 150. In the state that the upper end of the) is fixed to the bottom surface of the body 110, the radially outer ends of the remaining two spiral wings (150b) is in contact with the inner wall of the hot air supply pipe (200) Evaporating the air disinfection chemicals to disinfect. The method of claim 7, wherein
The through hole 141 is formed in the center of the grill 140 to allow the upper portion of the second tubular portion 130 to penetrate, and the bottom surface 142 of the wall portion defining the through hole is the upper flange 135. A device for evaporating the air disinfection chemicals for disinfecting the air, characterized in that the contact with).

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