KR102228610B1 - Antivirus gate - Google Patents

Abstract

An antivirus gate according to the present invention is erected perpendicular to a passenger movement path, and 405 nm light, which is harmless to a human body, is directly irradiated into a passage area of the gate. At an internal channel of a frame constituting the gate, a blower, a UVA LED, a photocatalyst coating flow path forming body, and a UVC LED are provided. Thus, while the internal suction of external air, UVA-photocatalyst-based air purification, UVC-based sterilization treatment, and the external ejection of sterilized air are sequentially performed, hazardous substances and viruses on the body or clothing of an entering/exiting person are removed with air shower. The external exposure of UVC light which is harmful to a human body is prevented, and thus safety is secured. Also, a high-efficiency sterilization environment based on 405 nm light and UVA/UVC ultraviolet light is established, and removal efficiency of harmful substances and viruses is enhanced. Indoor pollution due to an entrance area such as an entrance door is prevented, and a space sterilization technology paradigm responding to the post-corona era is achieved.

Description

Antivirus gate

The present invention relates to an anti-virus gate, and more specifically, a frame constituting the gate by direct irradiation of 405 nm light harmless to the human body to the passage area of the gate vertically placed on the entrance and exit path, thereby performing floor surface sterilization and space sterilization, and A blower, UVA LED and photocatalyst coating flow path forming body, and UVC LED are installed in the internal channels of the device, so that the internal suction of external air, UVA-photocatalyst-based air purification, UVC-based sterilization treatment, and external ejection of sterilized air proceed in sequence. B. Safety is secured by preventing external exposure of UVC light, which is harmful to the human body, by removing harmful substances and viruses from clothing with an air shower, while establishing a complex high-efficiency sterilization environment based on 405 nm light and UVA/UVC ultraviolet rays, and efficiency of removing harmful substances and viruses. It relates to an anti-virus gate that enables the implementation of a paradigm of space sterilization technology that responds to the post-corona era and prevents indoor pollution through access areas such as the entrance.

The entrance is an entrance that divides and connects the interior and exterior of a building such as a house, and if a person enters the entrance with pollutants on it, the interior of the building may be contaminated.

Meanwhile, according to "Emerging Infectious Diseases" of the CDC (US Centers for Disease Control and Prevention) in April, 100% of coronavirus was detected on the floor of a pharmacy used only by medical workers in hospitals in Wuhan, China. Appeared to be moving. A research team at the University of Houston in the United States took a bacterial sample from the front door and tested it. As a result, 40% of the sample was contaminated with a bacterium called “Clostridium difficile”. According to a paper published in the medical journal “New England Journal of Medicine,” about 500,000 people are infected with C. difficile every year. The usual route of infection is hospitals, but 35% of them have occurred outside the hospital.

Since there is no device at the entrance to remove harmful foreign substances including viruses attached to clothes or hands and feet, it pollutes the room when entering the room from the outside and is infected with infectious bacteria such as viruses. It causes disease. And, as we enter the post-corona era, the paradigm is changing from an air cleaning function to a space sterilization function, but the entrance space sterilization device is absent.

Nowadays, when fear of viruses has increased due to Corona 19, high attention is paid to improving air quality above all else, and as an air purifier became an essential household appliance due to the rapidly increasing fine dust from several years ago, now air that can remove viruses from the air Sterilization equipment is in the spotlight. In addition, the demand for air sterilization devices is rapidly increasing for life protection in small-scale dense facilities centering on multi-use facilities, and it is becoming an essential product for building a life protection system as a defense against various harmful substances such as bacteria/viruses. Meanwhile, with the operation of indoor air conditioners in multi-use facilities in the summer inevitably, experts continue to raise the risk of spreading the Corona 19 virus due to the wind of the air conditioner. It is judged to be.

Accordingly, a new virus sterilization service with virus sterilization is required, and in particular, a service that prevents the spread of the virus by sterilizing the entrances of buildings or residential areas with frequent traffic is required. Technology is being developed. The anti-virus gate refers to a device that irradiates UV or sprays chemical or air to sterilize when a person passes through a specific sterilization space.

As a prior art, Korean Patent Office Publication No. 10-2018-0116863 "Common vestibule disinfection system and its driving method for preventing the inflow of external fine dust and bacteria" and Korean Patent Office Publication No. 10-2019-0076579 There is a "exhaust and disinfection room"

In general, ultraviolet (UV) rays are used as sterilization means for antivirus gates. In particular, UVC, which has a wavelength range of 100 to 280 nm, has an advantage of being able to sterilize 99.99% of viruses in a short time because it has excellent sterilization power. However, while UVC shows certain sterilizing power, there is a problem that it can be harmful to the human body, such as causing skin damage, aging, and vision damage. In other words, it is necessary to use UVC to improve the sterilization power of the anti-virus gate, but it can be a problem if direct irradiation to the entrance and exit person.

Republic of Korea Patent Laid-Open Publication No. 10-2018-0116863 "Common entrance disinfection system for preventing the inflow of external fine dust and bacteria and its driving method" Korean Patent Laid-Open Publication No. 10-2019-0076579 "Pick-out sterilization chamber"

Therefore, the present invention improves the problems of the prior art such that the gate body is vertically erected on the path of the entry and exit, and a 405 nm light emission panel is mounted on the vertical frame of the gate body, so that 405 nm light, which is harmless to the human body, is directly irradiated to the entry and exit area As a result, floor surface sterilization and space sterilization are performed, and blowers, UVA LEDs, photocatalyst coating flow path forming bodies, and UVC LEDs are provided in the internal channels of the vertical and horizontal frames that make up the gate body to inhale the external air inside, UVA-photocatalyst. 405nm as safety is secured by preventing external exposure of UVC light, which is harmful to humans, by removing harmful substances and viruses from the body or clothes of the person entering the body or clothes as the air purifying base, UVC-based sterilization treatment, and external ejection of sterilized air are sequentially carried out. It is possible to build a complex high-efficiency sterilization environment based on light and UVA/UVC ultraviolet rays, increase the efficiency of removing harmful substances and viruses, prevent indoor pollution through entrance areas, etc., and implement a space sterilization technology paradigm that responds to the post-corona era. The object of the present invention is to provide an antivirus gate of a new type of multistage structure that can be achieved.

In addition, in the present invention, the photocatalyst coating channel formation body irradiated with UVA from the UVA LED _{is implemented as a helical TiO 2} mesh plate, so that the movement path of the external air and the contact area of the photocatalyst are maximized, so that the UVA irradiation time and contaminants (fine dust) , VOCs, etc.) It aims to provide a new type of multi-stage anti-virus gate that can maximize the efficiency of air purification and removal of harmful substances and viruses as the removal time increases.

In addition, in the present invention, the 405nm light emitting panel coupled to the vertical frame of the gate body consists of a stacked structure of an LED light source plate, a metal reflector plate, white paper, a heat sink, and a prismatic Fresnel lens. As it is refracted and irradiated uniformly on the floor and space, the spread of viruses/contaminants through the floor or shoe sole, and the spread of viruses/contaminants through the space can be prevented. An object of the present invention is to provide an antivirus gate having a multistage structure.

According to the features of the present invention for achieving the above object, the present invention is a vertical frame (120a) that is vertically erected at the set point of the person moving path (2), and disposed on the left and right sides of the passage area 110 through which the person passes ) And a horizontal frame 120b disposed horizontally above the vertical frame 120a, wherein the vertical frame 120a and the horizontal frame 120b have internal channels 123 communicating with each other, and the vertical frame A gate body 100 in which a suction port 121 and a discharge port 122 are formed in 120a and a discharge port 122 is formed in the horizontal frame 120b; A 405 nm light emitting panel 200 coupled to the vertical frame 120a of the gate body 100 and irradiating 405 nm light in a lateral direction and a downward direction; It is disposed in the inner channel 123 of the horizontal frame (120b), performs air conditioning and sterilization of the external air introduced from the inlet (121), and generates sterilized air to eject sterilized air through the discharge port (122). Unit 300; A controller 700 for controlling the operation of the 405nm light emitting panel 200 and the sterilizing air generating unit 300; including, the 405nm light emitting panel 200, a plurality of 405nm light outputs for irradiating 405nm light Edge type LED light source plate 210 having an LED; A metal reflective plate 220 attached to the rear end surface of the LED light source plate 210 to prevent passage of 405 nm light through the rear end surface; A white paper 230 attached to the front surface of the metal reflective plate to induce diffuse reflection of 405nm light; A heat sink 240 attached to the rear surface of the metal reflective plate 220; And a prism-type Fresnel lens 250 disposed in a front-side setting region of the LED light source plate 210 and refracting 405 nm light to induce 405 nm light irradiation downward. Provides an antivirus gate

The anti-virus gate according to the present invention further includes an air quality sensor 400 installed in the gate body 100 to detect air quality information at the entrance side of the passage region 110, and the controller 700 The air quality information may be received from the air quality sensor 400, and the operation of the 405 nm light emitting panel 200 and the sterilized air generating unit 300 may be controlled according to the air quality information.

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In the anti-virus gate according to the present invention, the suction port 121 and the discharge port 122 of the vertical frame 120a are formed at the lower part and the middle part, respectively,

The sterilized air generating unit 300 includes a blower 310 installed in communication with the suction port 121; A UVA LED 320 disposed in the internal channel 123 of the vertical frame 120a, and irradiating UVA light with external air that is sucked into the blower 310 and moves upward to perform air purification for the external air; A photocatalytic coating flow path forming body 330 disposed in the inner channel 123 of the vertical frame 120a, performing photocatalytic air purification for external air that is sucked into the blower 310 and moving upward, and is arranged vertically in a spiral shape. ); A UVC LED 350 disposed in the internal channel 123 of the vertical frame 120a, and irradiating UVC light with external air that is sucked into the blower 310 and moves upward to perform a sterilization treatment for the external air; It may be made in a configuration including a.

The anti-virus gate according to the present invention includes an infrared thermal imaging camera 500 installed in the gate body 100 and detecting body temperature information of a person entering the passage area 110; A blocking panel 600 for automatically opening and closing the passage region 110 of the gate body 100: further includes,

The controller 700 receives accessor's body temperature information from the infrared thermal imaging camera 500, and opens the passage area 110 only when the accessor's body temperature information is less than a set entry limit temperature, so that the person enters the passage area 110 ) Can be controlled to be able to enter.

The anti-virus gate according to the present invention is a passage area of the gate that is vertically erected in the path of the entry and exit, and 405 nm light is directly irradiated to perform floor sterilization and space sterilization, and a blower in the internal channel of the frame constituting the gate, UVA LED, photocatalyst coating flow path forming body, and UVC LED are equipped to inhale external air, purify air based on UVA-photocatalyst, sterilization treatment based on UVC, and external ejection of sterilization air sequentially, and harmful substances on the body or clothing of visitors. As the safety is secured by preventing external exposure of UVC light that is harmful to the human body by removing the virus and the virus with an air shower, the establishment of a complex high-efficiency sterilization environment based on 405nm light and UVA/UVC ultraviolet rays, increase of the efficiency of removing harmful substances and viruses, etc. It has the effect of preventing indoor pollution through the access area and enabling the realization of a space sterilization technology paradigm that responds to the post-corona era.

1 is a block diagram of an antivirus gate according to an embodiment of the present invention;
2 is an exemplary view of an installation location of an anti-virus gate according to an embodiment of the present invention;
3 is a view for showing a gate body according to an embodiment of the present invention;
4 is a diagram showing a detailed configuration of a sterilizing air generating unit according to an embodiment of the present invention;
5 is a diagram showing a detailed configuration of a 405nm light emitting panel according to an embodiment of the present invention;
6 is a partial perspective view for showing a photocatalyst coating flow path forming body according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6 in the accompanying drawings. On the other hand, in the drawings and detailed description, illustrations and references to configurations and actions that can be easily understood by those in this field from general terms have been simplified or omitted. In particular, in the illustration and detailed description of the drawings, a detailed description and illustration of a specific technical configuration and operation of elements not directly related to the technical features of the present invention are omitted, and the technical configuration related to the present invention is illustrated or described.

Antivirus gate 1 according to an embodiment of the present invention, as shown in Figure 1, the gate body 100, 405nm light emission panel 200, sterilizing air generating unit 300, air quality sensor 400, infrared thermal image It consists of a configuration including a camera 500, a blocking panel 600, and a controller 700.

The gate body 100 is vertically erected at a set point of the person moving path 2, and forms a passage area 110 through which the person enters. The gate body 100 may be installed in the middle door of the front door of the front door, may be installed in the front door itself, or may be installed in various access areas as shown in FIG. 2.

The gate body 100 according to the embodiment of the present invention includes a pair of vertical frames 120a disposed on the left and right sides of the passing region 110, and a horizontal frame disposed horizontally above the vertical frame 120a, as shown in FIG. 3. It consists of (120b).

In the vertical frame 120a and the horizontal frame 120b, as shown in FIG. 4, external air is introduced and flowed, while sterilizing air flows and discharges internal channels 123, respectively. The internal channels of the vertical frame 120a The inner channel 123 of the horizontal frame 120b and 123 communicates with each other. In addition, a suction port 121 and a discharge port 122 are formed in the vertical frame 120a, and a discharge port 122 is formed in the horizontal frame 120b.

Here, in the vertical frame 120a according to the embodiment of the present invention, a suction port 121 is formed at a lower portion and a discharge port 122 is formed at a middle portion. Through this, as the sterilized air is ejected toward the entire body of the visitor, it is possible to increase the efficiency of removing pollutants and viruses while shaking off the body and clothing of the visitor. In addition, the horizontal frame 120b according to the embodiment of the present invention forms a discharge port 122 at a central portion in the width direction. Through this, sterilizing air is ejected from the upper part of the head of the visitor toward the head of the visitor (air curtain), and the efficiency of removing pollutants and viruses can be increased while shaking the hair.

The 405nm light emitting panel 200 is coupled to the vertical frame 120a of the gate body 100, and performs space sterilization by irradiating 405nm light in the lateral direction, while sterilizing the bottom surface by irradiating 405nm light downward. Will be performed. Here, the upper and lower ends of the 405nm light emitting panel 200 may be located at the lower end and the middle part of the vertical frame 120a, and the 405nm light emitting panel 200 may be formed in a rectangular shape that is elongated in the vertical direction.

As shown in FIG. 5, the 405nm light emitting panel 200 according to an embodiment of the present invention includes an LED light source plate 210, a metal reflective plate 220, a white paper 230, a heat sink 240, a prismatic Fresnel lens ( 250).

The LED light source plate 210 is made of an edge-type panel structure including a plurality of 405nm light output LEDs that irradiate 405nm light. Such an LED light source plate 210 may be provided with an optical waveguide so that 405nm light can be evenly spread and irradiated.

The metal reflective plate 220 is attached to the rear end surface of the LED light source plate 210 and prevents the passage of 405 nm light to the rear end surface.

The white paper 230 is attached to the front surface of the metal reflective plate and induces diffuse reflection of 405 nm light.

The heat sink 240 is attached to the rear surface of the metal reflective plate 220 to induce external emission of heat generated from the LED light source plate 210.

The prismatic Fresnel lens 250 is disposed on the front end of the LED light source plate 210 and has a prism-shaped structure to refract 405 nm light and induces 405 nm light irradiation in the downward direction.

The sterilizing air generating unit 300 is disposed in the inner channel 123 of the horizontal frame 120b, performs air conditioning and sterilization of the external air introduced from the inlet 121, and then sterilized with the discharge port 122 It blows out air.

To this end, the sterilizing air generating unit 300 according to an embodiment of the present invention includes a blower 310, a UVA LED 320, a photocatalytic coating flow path forming body 330, a UVC LED 350, and sterilizing air as shown in FIG. 4. It consists of a configuration including a discharge fan (340).

The blower 310 is installed to be in communication with the suction port 121 and forcibly sucks external air into the inner channel 123 of the vertical frame 120a.

The UVA LED 320 is disposed in the inner channel 123 of the vertical frame 120a, and performs air purification by irradiating UVA light with external air that is sucked into the blower 310 and moves upward.

The photocatalytic coating flow path forming body 330 is disposed in the inner channel 123 of the vertical frame 120a, and performs photocatalytic air purification for external air that is sucked into the blower 310 and moves upward. The photocatalyst coating flow path forming body 330 may be disposed above the UVA LED 320 to receive UVA irradiation from the UVA LED 320. In particular, the photocatalyst coating flow path forming body 330 according to the embodiment of the present invention is implemented as a titanium dioxide (TiO ₂ ) coated mesh plate having a helical structure as shown in FIG. 6 so that the movement path of the external air and the contact area of the photocatalyst are maximized. Let it expand. The main frame of the titanium dioxide (TiO ₂ ) coated mesh plate is made of a material with high light transmittance such as acrylic.

Through this, as the UVA irradiation time and the time to remove pollutants (fine dust, VOCs, etc.) are increased, the air purification efficiency and the efficiency of removing harmful substances and viruses can be maximized.

The UVC LED 350 is disposed in the internal channel 123 of the vertical frame 120a, and is sucked into the blower 310 and irradiated with UVC light to move upward to perform sterilization treatment for the external air. . Although it has a strong sterilizing power, since UVC, which is dangerous when exposed to the human body, is irradiated only inside the gate body 100 and does not leak to the outside, human safety can be ensured.

The sterilizing air discharge fan 340 is installed in communication with the discharge port 122 of the vertical frame 120a and the discharge port 122 of the horizontal frame 120b to discharge sterilizing air, through which the sterilizing air is sprayed at a set speed. As a result, an air curtain can be formed.

The air quality sensor 400 is installed in the gate body 100 to detect air quality information on the entrance side of the passage region 110 and transmit it to the controller 700. The air quality information may include temperature, humidity, PM2.5 fine dust concentration, VOCs concentration, carbon dioxide concentration, etc.

The infrared thermal imaging camera 500 is installed on the gate body 100 and detects body temperature information of a person entering the passage area 110.

The blocking panel 600 automatically opens and closes the passage region 110 of the gate body 100.

The controller 700 controls the operation of the 405 nm light emitting panel 200, the sterilizing air generating unit 300, and the blocking panel 600. Here, the controller 700 according to an embodiment of the present invention receives air quality information from the air quality sensor 400 and controls the operation of the 405 nm light emitting panel 200 and the sterilized air generating unit 300 according to the air quality information. do. In addition, the controller 700 according to an embodiment of the present invention receives the body temperature information of the visitor from the infrared thermal imaging camera 500, and opens the passage area 110 only when the body temperature information of the visitor is less than the set entry limit temperature, and the person passes through it. It is controlled to be able to enter the area 110. This ensures that people with suspected infectious diseases are restricted from entering.

In the anti-virus gate 1 according to the embodiment of the present invention configured as described above, the gate body 100 is vertically erected on the entrance/exit movement path 2, and 405 nm light is placed on the vertical frame 120a of the gate body 100. The emission panel 200 is mounted to directly irradiate harmless 405 nm light into the passage area 110 to perform floor sterilization and space sterilization, and the vertical frame 120a and the horizontal frame 120b constituting the gate body 100 ) In the inner channel 123 of the blower 310, UVA LED 320 and photocatalyst coating flow path forming body 330, UVC LED 350 is provided to internal suction of external air, UVA-photocatalyst based air purification, UVC As the base sterilization treatment and the external ejection of sterilized air are sequentially performed, harmful substances and viruses on the body or clothing of the visitor are removed by an air shower, thus preventing the external exposure of UVC light, which is harmful to the human body, and securing safety while securing 405 nm light. It is possible to build a complex high-efficiency sterilization environment based on UVA/UVC and ultraviolet rays, increase the efficiency of removing harmful substances and viruses, prevent indoor pollution through entrance areas, etc., and implement a space sterilization technology paradigm that responds to the post-corona era. You will be able to.

In addition, in the anti-virus gate 1 according to the embodiment of the present invention, the photocatalytic coating flow path forming body 330 irradiated with UVA from the UVA LED 320 _{is implemented as a helical TiO 2} mesh plate 331 to provide external air. Since the movement path of the photocatalyst and the contact area of the photocatalyst are maximized, the UVA irradiation time and the time to remove pollutants (fine dust, VOCs, etc.) are increased, thereby maximizing the efficiency of removing harmful substances and viruses.

In addition, the anti-virus gate 1 according to the embodiment of the present invention includes a 405 nm light emitting panel 200 coupled to the vertical frame 120a of the gate body 100, the LED light source plate 210, the metal reflecting plate 220, It is composed of a stacked structure of white paper 230, heat sink 240, and prismatic Fresnel lens 250, so that 405nm light is evenly diffused by diffuse reflection and refracted downward, so that it is uniformly irradiated to the floor surface and space, so that the floor surface or the sole of the shoe It is possible to prevent the spread of viruses/pollutants through the space and the spread of viruses/pollutants through the space, thus maximizing the hygiene management of the indoor space.

As described above, the antivirus gate according to the embodiment of the present invention is illustrated according to the above description and drawings, but this is only an example, and various changes and modifications are possible within the scope not departing from the technical idea of the present invention. It is possible.

1: antivirus gate
2: Moving path of accessor
100: gate body
110: passing area
120a: vertical frame
120b: horizontal frame
121: inlet
122: discharge port
123: internal channel
200: 405nm light emitting panel
210: LED light source plate
220: metal reflective plate
230: white paper
240: heat sink
250: Prismatic Fresnel lens
300: sterilizing air generating unit
310: Blower
320: UVA LED
330: photocatalyst coating flow path forming body
331: titanium dioxide (TiO ₂ ) mesh plate
340: sterilizing air discharge fan
350: UVC LED
400: air quality sensor
500: infrared thermal imaging camera
600: blocking panel
700: controller

Claims (5)

A vertical frame (120a) that is vertically erected at a set point of the person moving path (2), and is disposed on the left and right sides of the passage area (110) through which the person passes, and a horizontal frame (120a) horizontally disposed above the vertical frame (120a). (120b), but the vertical frame (120a) and the horizontal frame (120b) has an inner channel 123 communicating with each other, while the suction port 121 and the discharge port 122 are formed in the vertical frame (120a) A gate body 100 having a discharge port 122 formed in the horizontal frame 120b;
A 405 nm light emitting panel 200 coupled to the vertical frame 120a of the gate body 100 and irradiating 405 nm light in a lateral direction and a downward direction;
It is disposed in the inner channel 123 of the horizontal frame (120b), performs air conditioning and sterilization of the external air introduced from the inlet (121), and generates sterilized air to eject sterilized air through the discharge port (122). Unit 300;
Includes; a controller 700 for controlling the operation of the 405nm light emitting panel 200 and the sterilized air generating unit 300; and
The 405nm light emitting panel 200,
Edge type LED light source plate 210 having a plurality of 405nm light output LEDs irradiating 405nm light; A metal reflective plate 220 attached to the rear end surface of the LED light source plate 210 to prevent passage of 405 nm light through the rear end surface; A white paper 230 attached to the front surface of the metal reflective plate to induce diffuse reflection of 405nm light; A heat sink 240 attached to the rear surface of the metal reflective plate 220; And a prism-type Fresnel lens 250 disposed in a front-side setting region of the LED light source plate 210 and refracting 405 nm light to induce 405 nm light irradiation downward. Antivirus gate.
The method of claim 1,
An air quality sensor 400 installed on the gate body 100 to detect air quality information on the entrance side of the passage region 110;
The controller 700 receives air quality information from the air quality sensor 400 and controls the operation of the 405 nm light emitting panel 200 and the sterilized air generating unit 300 according to the air quality information. Antivirus gate. The method of claim 1,
The suction port 121 and the discharge port 122 of the vertical frame 120a are formed at the lower part and the middle part, respectively,
The sterilized air generating unit 300,
A blower 310 installed in communication with the suction port 121;
A UVA LED 320 disposed in the internal channel 123 of the vertical frame 120a, and irradiating UVA light with external air that is sucked into the blower 310 and moves upward to perform air purification for the external air;
A photocatalytic coating flow path forming body 330 disposed in the inner channel 123 of the vertical frame 120a, performing photocatalytic air purification for external air that is sucked into the blower 310 and moving upward, and is arranged vertically in a spiral shape. );
A UVC LED 350 disposed in the internal channel 123 of the vertical frame 120a, and irradiating UVC light with external air that is sucked into the blower 310 and moves upward to perform a sterilization treatment for the external air; Anti-virus gate, characterized in that consisting of a configuration comprising a. The method of claim 1,
An infrared thermal imaging camera 500 installed in the gate body 100 and detecting body temperature information of a person entering the passage area 110;
A blocking panel 600 for automatically opening and closing the passage region 110 of the gate body 100: further includes,
The controller 700 receives accessor's body temperature information from the infrared thermal imaging camera 500, and opens the passage area 110 only when the accessor's body temperature information is less than a set entry limit temperature, so that the person enters the passage area 110 ) Antivirus gate, characterized in that the control to be able to enter. delete

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