JP2011030719A - Air curtain device and infection prevention system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect a position to be applied and deliver an antibacterial air curtain to the detected position. <P>SOLUTION: This air curtain device for delivering an air curtain to the interior of a vehicle includes: an air curtain mechanism 2 for delivering an antibacterial air curtain in which one or more of ozone concentration, ion content, heating and humidification are adjusted by driving an air conditioning mechanism 21 to a predetermined position in the vehicle designated by a given command; and infrared cameras 31 for thermography provided to detect the states of persons in the vehicle. When a person having an attack of fever is detected based on the thermography, the position of the person having an attack of fever in the vehicle is detected, and an air curtain controller 7 outputs a command for designating the detection result as a predetermined position to the air curtain mechanism 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air curtain device and an infection prevention system, and more particularly to an air curtain device and an infection prevention system that are selectively applied to a space corresponding to a designated position.

  In response to recent global epidemics such as new influenza and SARS (Severe Acute Respiratory Syndrome), it is essential to respond to infectious diseases at the individual, home and municipal levels. In individuals and homes, measures such as introduction of an air purifier represented by an air purifier and regular use of a chemical substance (for example, disinfecting alcohol) are actively taken.

  On the other hand, measures for minimizing the toxicity of bacteria, mold, viruses, etc. (hereinafter referred to as microorganisms) in public institutions and public facilities (hereinafter referred to as public places) are not sufficient, and their enhancement is hoped for. It is rare.

  In order to meet the demand for countermeasures in public places, for example, the air purification device of Patent Document 1 is installed in a hospital or the like, takes in air in a facility such as a hospital, and inactivates viruses and the like outside the facility. It has a configuration for discharging. Therefore, it is possible to prevent the spread of viruses, bacteria, and the like to the outside due to contaminated air in the hospital. However, with this apparatus, it has been difficult to clean the air in the facility.

  In order to purify the air in the facility, according to the air curtain device of Patent Document 2, an air curtain using ozone is generated from the ceiling of the room toward the room.

Registered Utility Model No. 3148325 JP 2001-299891 A

  The air curtain device of Patent Document 2 is controlled so that the ozone concentration is always a low concentration of 0.08 ppm or less under manned conditions. In other words, the ozone control device is always controlled based on uniform information. However, in public places, the target space is large, and an unspecified number of people come in and out, or gather, preventing infection from a specific person suspected of infection to another person, or a specific partial It is realistic to apply anti-infection measures to target areas. However, when the apparatus of Patent Document 2 is used, since the air curtain is generated for the entire space, it is impossible to cope with the request.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an air curtain device and an infection prevention system that detect a position to be applied and generate an antibacterial air curtain for the detected position.

  According to an aspect of the present invention, an air curtain device that sends out an air curtain to the inside of a housing portion that accommodates a person sends out an antibacterial air curtain to a predetermined position inside the housing portion indicated by a given command. An air curtain generation unit, a state detection unit provided in association with each position inside the storage unit in order to detect a state of a person stored in the storage unit or a state of air inside the storage unit, and a state Based on the state information indicating the state detected by the detection unit, a position detection unit that detects a position where the state indicates a predetermined state, and a command that instructs the position detected when the position detection unit indicates a predetermined state as a predetermined position An air curtain control unit for outputting to the curtain generation unit.

  Desirably, the air curtain generating unit delivers an antibacterial air curtain in which one or more of ozone concentration, heating, ion inclusion, and humidification are adjusted.

  Desirably, when adjustment is performed by humidification, the relative humidity of the antibacterial air curtain is adjusted to be in the range of 50% to 100%. In relative humidity, it is 50 to 100%, more preferably 50 to 90%, still more preferably 50 to 80%.

  Desirably, when the temperature is adjusted by heating, the temperature of the antibacterial air curtain is adjusted to be in the range of 25 ° C to 50 ° C. In heated air, it is 25-50 degree | times, More preferably, it is 30-45 degree | times, More preferably, it is set to 38-40 degreeC.

Desirably, the ambient air around the antibacterial air curtain is cooled.
According to another aspect of the present invention, in an infection prevention system including an air curtain device that sends out an air curtain into a housing portion that houses a person, the air curtain device has a predetermined position inside the housing portion indicated by a given command. Air curtain generating section for sending out an antibacterial air curtain, and each position inside the housing section to detect the state of the person housed in the housing section or the state of the air inside the housing section A state detection unit provided in association with the state detection unit, a position detection unit for detecting a position where the state indicates the predetermined state, and a position detection unit detected based on the state information indicating the state detected by the state detection unit An air curtain control unit that outputs the command to instruct the position as a predetermined position to the air curtain generation unit.

  Desirably, it further includes an imaging unit that images the position detected when the position detection unit indicates a predetermined state as an imaging range, and a display unit that displays an image based on image data output by the imaging unit.

  Preferably, by processing the image data, information specifying the position detected when the position detection unit indicates a predetermined state is detected and output from the image data.

  Preferably, an inner output unit that outputs information toward the inside of the housing unit is further provided, and when the position detecting unit detects a position indicating a predetermined state, the first predetermined message is output from the inner output unit. .

  Desirably, a shielding part for shielding the inside of the accommodating part from the outside is further provided, and when the position indicating the predetermined state is detected by the position detecting part, the inside of the accommodating part is shielded from the outside by the shielding part. .

  Preferably, an outer output unit that outputs information toward the outside of the housing unit is further provided, and when the position detecting unit detects a position indicating a predetermined state, the second predetermined message is output from the outer output unit. .

  Desirably, a communication part which communicates with the computer of the external organization of an infection prevention system is further provided, and a communication part transmits a predetermined report to a computer, when a position in which a state points to a predetermined state is detected by a position detection part.

  Preferably, the air curtain device includes a reception unit that receives a request for requesting output of the command to the air curtain generation unit, and the information on the predetermined position indicated by the command is included in the received request in advance.

  According to the present invention, the state detection unit can detect the position where the antibacterial air curtain is to be applied, and generate an antibacterial air curtain for the detected position.

It is a figure which shows schematic hardware constitutions of the infection prevention system which concerns on embodiment. It is a figure which shows typically arrangement | positioning of each part of the air curtain mechanism which concerns on embodiment. It is a figure explaining the ion generation mechanism which concerns on embodiment. It is a graph which shows the relationship between the applied voltage which concerns on embodiment, ion concentration, and ozone concentration. It is a figure explaining the experimental environment which concerns on embodiment. It is a figure which shows the function structure of the infection prevention system which concerns on embodiment. It is a process flowchart of the infection prevention system which concerns on embodiment. It is a process flowchart concerning the air curtain generation | occurrence | production of the infection prevention system which concerns on embodiment. It is a figure which shows typically an example of the supply aspect of the air curtain in the vehicle which concerns on embodiment. It is a figure which shows one example of the emergency message display which concerns on embodiment. It is a figure which shows an example of the alert message display which concerns on embodiment. It is a figure which shows typically the aspect of the report to the external organization which concerns on embodiment. It is a figure which shows typically the supply aspect of the antibacterial air curtain according to the request which concerns on embodiment. It is a processing flowchart of antibacterial air curtain supply according to the request concerning an embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol shows the same or equivalent part.

  In the present embodiment, “infection” refers to the invasion of microorganisms into a living body, and the owner of the living body is referred to as an infected person. “Disease” refers to the appearance of symptoms (cough, fever, etc.) in a living body due to infection. “Air purification” means removal of invisible dust and fungi floating in the air, and the air thus removed is called clean air. In the daily life environment, “antibacterial” means “sterilization” (killing all microorganisms), “sterilization” (sterilization by killing even a part of microorganisms), “disinfection”, “disinfection”, “ Includes all the terms "antibacterial" (microbe growth inhibition), "bacteriostatic" (microbe growth inhibition), "antifungal" and "preservation". In other words, it is included as part of the antibacterial technology when the microorganism is not killed and its growth is inhibited. “Inactivation” refers to, for example, eliminating the ability to grow bacteria and the like, to mean losing the ability to infect for viruses, and to prevent allergic reactions from occurring for allergic substances.

  “Public places” means trains, airplanes, ships, buses, taxis and other public vehicles, companies and schools, hospitals / insurance / clinic relations, movie theaters, restaurants, shopping markets, lodging facilities, etc. A relatively large closed space inside a public facility, which is a space for accommodating people. In the present embodiment, the description will be made assuming a vehicle such as a train as a public place, but the applicable space is not limited to this.

<Air curtain mechanism>
The air curtain mechanism according to the present embodiment functions as an air curtain generator. Specifically, the air curtain includes positive ions and negative ions by adding an ion generating element that generates ozone and positive ions and negative ions. Such an air curtain generator can control the flow of air containing ozone and positive and negative ions, and in particular the wall (partition) is formed by the flow of air containing both positive and negative ions of high concentration depending on the wind direction. It is possible to configure and hold the human body or article in a space shielded from the outside by the air wall. In addition, the air curtain in this Embodiment shows the concept similar to the term of the commonly used air curtain, and does not show a specific concept in particular. What constitutes such a state is shown. That is, the air curtain in the present embodiment has a function of separating the space and controlling the diffusion of air by controlling the air flow. In this respect, the temperature control function is mainly used to efficiently transmit the temperature. It is different from an air conditioner that has a function of blowing air to circulate or mix air to perform well.

<Schematic configuration of infection prevention system>
Referring to FIG. 1, the infection prevention system according to the present embodiment includes a computer 1 for centrally controlling and monitoring the entire system, and for generating an air curtain in a designated part space in a public place. A plurality of air curtain mechanisms 2, a monitor mechanism 3 for monitoring a public place to which the system is applied, and a communication line 4 for data communication between the air curtain mechanism 2, the monitor mechanism 3 and the computer 1. A communication line 5 including a public line such as the Internet or a dedicated line enabling data communication between each of the external computers 6 provided in an external organization (a health center, a fire department, etc.) and the computer 1, and a plurality of air An air curtain controller 7 that generates and outputs a signal for controlling the operation of the curtain mechanism 2 is included.

  The computer 1 includes a CPU (Central Processing Unit) 11, a memory 12 for storing data and programs, a keyboard, a mouse, and the like, and an input unit 13 for inputting instructions when operated by an operator, a display, and an audio output unit , An output unit 14 formed of a printer or the like, and an I / F (Interface) 15 for connecting the wired or wireless communication lines 4 and 5 and the computer 1 to each other.

  Each of the air curtain mechanisms 2 is installed corresponding to each of a plurality of sections in the vehicle. Each air curtain mechanism 2 includes an air-conditioning mechanism 21 that adjusts the air curtain air to be generated and a down-flow mechanism 22 for supplying the air flow adjusted by the air-conditioning mechanism 21 into the vehicle as a down-flow described later.

  The air conditioning mechanism 21 includes an ozone generator 211, a PCI (plasma cluster ion: registered trademark) generator 212, a humidifier 213, a heater 214, a cooler 215, and adjusted air temperature, humidity, and ozone concentration in the air Including various sensor groups 216 for detecting. The downflow mechanism 22 includes a fan group 221 including a plurality of fans in order to generate a downflow airflow.

  The monitor mechanism 3 includes a plurality of infrared cameras 31 for monitoring an object such as a person in a public place, a camera 32 such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) for photographing a subject, An in-car display 33 for presenting information to a public place, that is, a person in the car, an out-of-car display 34 for presenting information to a person in the car, and a lock mechanism 35 for shielding the inside of the car from the outside. including.

  Each infrared camera 31 is installed at a different position in the vehicle so that the imaging range is different. Information (number data or the like) for uniquely identifying each infrared camera 31 is registered in advance in the internal memory of the infrared camera 31. Each infrared camera 31 adds the identification information read from the internal memory and outputs the image data captured.

  The CCD camera 32 can shoot almost the entire area inside the vehicle provided with the CCD camera 32 by freely changing the shooting angle (angle) in accordance with an instruction from the outside.

  The air curtain controller 7 generates and outputs a control signal for controlling each part of the air curtain mechanism 2, and an output I / O having a plurality of output terminals O1, O2, O3,. F (Interface) 72 is included. The signal generation unit 71 inputs a given signal, generates a control signal for the air curtain mechanism 2 based on the input signal, and outputs the control signal to the output I / F 72. The control signal includes a designation signal that designates the air curtain mechanism 2 to be controlled. The designation signal is a signal that indicates one of the output terminals O1, O2, O3,... Of the output I / F 72.

  The output terminals O1, O2, O3,... Of the output I / F 72 are connected to the air curtain mechanism 2 in a one-to-one correspondence. The output I / F 72 outputs the control signal via an output terminal indicated by the designation signal based on the designation signal of the control signal input from the signal generation unit 71. Therefore, the generated control signal can be selectively given only to the air curtain mechanism 2 indicated by the designation signal.

<Configuration of air curtain mechanism>
In FIG. 2, the space of the vehicle which is a public place is schematically shown by the inside of a substantially rectangular parallelepiped. A plurality of air curtain mechanisms 2 are provided behind the ceiling of the vehicle in order to generate an air curtain inside a substantially rectangular parallelepiped. In FIG. 2, one unit is shown for ease of explanation. The number provided depends on the size of the vehicle.

  An ozone generator 221 and a PCI generator 212 are provided in association with the fan 221A. The air sent out by the air blown by the fan 221A contains ozone generated by the ozone generator 221 and plasma cluster ions generated by the PCI generator 212, and is then supplied to the heater 214. Then, after being heated to a predetermined temperature, it is supplied to the humidifier 213. After being humidified to a predetermined humidity by the humidifier 213, the air is sent into the vehicle via the flaps F1, F2 and F3 of the air outlet 222A provided on the ceiling surface. Here, a cooler 215 is provided on the back of the ceiling in relation to the air outlet provided with the flaps F1 and F3. The airflow blown from the ceiling side air outlet 222A is sucked under the floor by the fan 221B through the flap of the air outlet 222B corresponding to the air outlet 222A provided in advance in the vehicle floor and forced from the inside of the vehicle. Is sent out. Thereby, a down flow is formed.

  The sent air is blown into a duct (not shown) by the fan 221B. This duct functions as a ventilation path for sending the air sent from under the floor to the ceiling side. The blown air is sucked by the fan 221A, led out to the ceiling side via the duct, and supplied again to the ozone generator 211 and the PCI generator 212. As described above, in the present embodiment, air is circulated. However, if external environmental conditions are allowed, the downflowed air may be discharged from the floor surface without being circulated.

  A sensor group 216 is provided in a duct (not shown) through which the air that has passed through the fan 221B under the floor is led to the fan 221A on the ceiling side.

  In order to generate the antibacterial air curtain, for example, in a train (see FIG. 9), an air curtain generating mechanism that is vertically paired may be provided around the seat. In other words, an air curtain is usually generated between the seats and before and after the seats for the purpose of cooling and heating. Therefore, at the normal time, only the heater 214 for heating or the cooler 215 for cooling operates, and the other devices stop operating. With this as a normal state, the ozone generator 211, the PCI generator 212, and the humidifier 213 can be selectively operated only in the air curtain surrounding a specific seat, thereby changing to an antibacterial air curtain. it can. As a result, a space corresponding to a specific position in a public place can be pseudo-isolated with an antibacterial air curtain by the air curtain mechanism 2 provided corresponding to the specific position.

<Operations of ozone generator and PCI generator>
In FIG. 2, the ozone generator 211 and the PCI generator 212 are shown separately, but actually they are integrally configured by members as shown in FIG. 3. Referring to FIG. 3, discharge PCI 901, embedded electrode 902, ceramic dielectric 903, generator 904, fan 905 corresponding to fan 221A and electric wire 906 are included for PCI generation. The discharge electrode 901 and the buried electrode 902 are discharged. A plasma region 907 is generated by the discharge of the discharge electrode 901 and the buried electrode 902. The generator 904 applies a voltage to the discharge electrode 901 and the embedded electrode 902. The fan 905 emits active air such as ions contained in the plasma region 907.

  When such ions are generated, creeping discharge is generated at the surface electrode portion by alternately applying positive and negative voltages between the discharge electrode 901 and the buried electrode 902, and positive ions are generated by discharge plasma under atmospheric pressure. Negative ions are generated and sent out simultaneously. According to the experiment, the peak voltage difference between the positive electrode and the negative electrode applied was 3.2 kV to 5.5 kV, and no harmful ozone amount was generated in this range of voltages (see FIG. 4).

By generating ions, positive ions contained in the air curtain are clustered with water molecules in the air to cluster H ₃ O ⁺ (H ₂ O) _n (n is 0 or a natural number), and negative ions are clustered with water molecules in the air. O ₂ ⁻ (H ₂ O) _m (m is 0 or a natural number). These positive and negative ions sent out into the air curtain surround bacteria, fungi, viruses or allergens that enter the air curtain, and the positive and negative ions on the surface thereof undergo the following chemical reactions (1) and ( According to 2), hydrogen peroxide H ₂ O ₂ , hydrogen dioxide HO _2, or hydroxy radicals · OH, which are active species, are generated.

(1) H ₃ O ⁺ + O ₂ ⁻ → OH + H ₂ O ₂ , (2) H ₃ O ⁺ + O ₂ ⁻ → HO ₂ + H ₂ O
The generated hydrogen peroxide H ₂ O ₂ , hydrogen dioxide HO _2, or hydroxy radical OH can be efficiently used for, for example, viruses by denaturing or destroying the surface proteins to lose the infectious ability of the virus. Invading viruses can be inactivated. In addition, the active species can be inactivated by acting on the surface cells and killing them against bacteria and fungi, and the allergen is harmless by direct reaction of these active species. It can be inactivated by being decomposed into other substances.

<Air curtain conditions>
In the present embodiment, the generation of the air curtain usually generates a downflow in which a wind having a wind speed of about 0.1 to 50 m / second is blown downward from above using the fan 221A that is a blower. An air circulation path is formed in which the downflow is sucked by the fan 221B on the floor surface and the sucked air is supplied to the ceiling fan 221 through a duct (not shown). The down flow is a gas flow configured such that the gas flowing in from above flows out from the opposing bottom surface, and is also called a vertical laminar flow. An antibacterial air curtain can be obtained by mixing one or more ozone or PCI generated during the downflow, moisture having a relative humidity of 50% or more by the humidifier 213, and heated air by the heater 214. In the control of humidity alone, it has been reported that if it is 50% or more, the activity of the influenza virus decreases regardless of other conditions. Regarding ozone, the standard value in the workplace is set to 0.1 ppm (0.2 mg / m ³ ) within 8 hours per day in Japan, and it is necessary to have a concentration below that around the human body. As for PCI, a plasma cluster ion generator with a plasma cluster ion amount of 50,000 / cm ³ detected at a linear distance of about 10 cm from the outlet of the ion generator is commercially available, and PCI is mixed in the air curtain. It is possible to make it.

  Increasing the relative humidity with the humidifier 213 and heating the outflow air of the air curtain with the heater 214 can be easily achieved by extending the control technology of the consumer air cleaner.

  When heated air is used for the air curtain, the antibacterial air curtain has a temperature of 25 to 50 ° C, more preferably 30 to 45 ° C, and even more preferably 38 to 40 ° C, in order to inactivate microorganisms more reliably. . In an environment where the ambient air is a high temperature, a cooler is provided around the antibacterial air curtain, that is, only the air passing through the flaps F1 and F3 among the three flaps F1 to F3 on the ceiling surface. By performing gas cooling with 215, the air in the center of the air curtain can be covered with cold air while maintaining a high temperature for antibacterial properties. Thereby, the problem of high temperature can be solved without deteriorating antibacterial properties, and the application range is expanded.

<Experiment 1>
The inventor conducted a test to confirm whether pathogenic bacteria can be inactivated under the environment of FIG. The bacteria used was E. coli. The test space is inside a sealed acrylic container 601 having an internal volume of 1 m ³ . An ozone generator 211 and a blower fan 603 were installed in the container, and a heater (heater) 607, a humidifier 608, and a cooler 609 that were selectively driven were installed. The blower fan 603 diffuses the ions generated from the ozone generator 211 into the acrylic container 601. In the acrylic container 601, the ion concentration when the acrylic container 601 was operated for 30 minutes was 7,000 ions / cm ³ for both positive ions and negative ions.

Immediately after the ozone generator 211 and the stirring fan 605 were driven, the solution containing E. coli 606 was sprayed for a time during which the atomizer 604 was sufficiently diffused (for example, 45 minutes). From 5 minutes after stopping the spraying, the internal air was sucked at a rate of 10 L / min for 10 minutes, and E. coli was recovered and sampled with an impinger (not shown). The sampling was carried out simultaneously in two impinger connected to 1 m ³ box.

  Next, Escherichia coli 606 was collected and sampled by the same test method as described above in a state where the ozone generator 211 was not driven.

  For example, in ozone sterilization, the ozone concentration was set to 0.5 ppm, and the heaters 607 and the cooler 609 were selectively driven to set environments of temperatures 25 ° C. and 5 ° C. The time taken to kill 100% of E. coli in such an environment was 5 minutes at 25 ° C. and 30 minutes at 5 ° C. As a result, it was confirmed that ozone sterilization has temperature dependence even at the same ozone concentration. In addition, it is known that some viruses have significantly reduced activity at high temperatures. Therefore, the setting of the temperature condition in the air curtain is important.

  The inventor confirmed the sterilizing effect by changing the relative humidity by driving the humidifier 608 with the temperature condition kept constant in the environment of FIG. When the humidity was less than 30%, the bactericidal effect of ozone gas was not observed at all. However, the bactericidal effect was exhibited at a relative humidity of 30 to 50%, and a further antibacterial effect of ozone was observed at 60 to 80%. It is also known that there is a possibility of preventing virus splashes due to moisture. Therefore, the setting of humidity conditions in the air curtain is important.

<Experiment 2>
The inventor conducted the following experiment in order to confirm that microorganisms were not diffused outside the air curtain.

  In a laboratory that looks like a pseudo vehicle (for example, the space shown in FIG. 2 corresponds), a body surface temperature inspection device thermography inspection device (for example, manufactured by IS7800N / NEC Avio Infrared Technology Co., Ltd.) is used to measure body temperature using a portable body warmer. The person who raised the height was monitored and an antibacterial air curtain was generated around it. Based on the monitor result, the diagnosis of disease occurrence (detected body temperature of 40 ° C. or higher) is detected by a personal computer outside the vehicle using USB (Universal Serial Bus) communication, and prepared (stored) in advance in the personal computer. The location of the sick person detected by the monitor was specified by linking with the location information in the laboratory. Based on the identified position information, the antibacterial air curtain generating mechanism as shown in FIG. 2 was operated.

  In the generation, a mechanism for generating a down flow in which a wind of about 0.1 to 50 m / sec. The bottom of this laboratory was equipped with a circulation mechanism for sucking down flow, and an air filter was further provided. An antibacterial air curtain was prepared by mixing ozone at a concentration of 0.1 ppm generated by an ozone generator (for example, OZ-200C: manufactured by Pretec Co., Ltd.) and heated air at 40 ° C. during the downflow.

In this state, Escherichia coli is sprayed at a concentration of 1.0 × 10 ⁵ cells / mL for 5 minutes in the air curtain, and 50 L of air is collected outside the air curtain using an air sampler (MAS100 / Merck). When the microorganism concentration was confirmed, Escherichia coli was not detected. That is, it was confirmed that microorganisms were not diffused outside the air curtain.

<Experiment 3>
The inventor conducted the following experiment in order to compare the presence or absence of microorganisms inside and outside the antibacterial air curtain depending on temperature conditions.

  In a laboratory that looks like a pseudo vehicle (for example, the space shown in FIG. 2 corresponds), a body surface temperature inspection device thermography inspection device (for example, manufactured by IS7800N / NEC Avio Infrared Technology Co., Ltd.) is used to measure body temperature using a portable body warmer. The person who raised the height was monitored and an antibacterial air curtain was generated around it. Based on the monitor result, the diagnosis of disease occurrence (detected body temperature of 40 ° C. or higher) is detected by a personal computer outside the vehicle using USB (Universal Serial Bus) communication, and prepared (stored) in advance in the personal computer. The location of the sick person detected by the monitor was specified by linking with the location information in the laboratory. Based on the identified position information, the antibacterial air curtain generating mechanism as shown in FIG. 2 was operated.

  In the generation, a mechanism for generating a down flow in which a wind of about 0.1 to 50 m / sec. The bottom of this laboratory was equipped with a circulation mechanism for sucking down flow, and an air filter was further provided.

  During the down flow, the temperature of the minishell heater was manually adjusted with a slider, and the temperature at a position 1 m away from the outlet in the vertical direction was measured with a radiation thermometer (IT-550F, manufactured by Horiba, Ltd.). The heater maximum capacity was 330 W, and a heater pipe type heater capable of raising the temperature of 20 ° C. air to 120 ° C. was used.

First, an air curtain composed of room temperature air without heating was prepared as a control, and an antibacterial air curtain was separately generated under temperature conditions of 30 ° C., 35 ° C., 38 ° C., 40 ° C., 45 ° C., and 50 ° C. . Actually, Escherichia coli is sprayed for 5 minutes at a concentration of 1.0 × 10 ⁶ cells / mL in this air curtain, and air is collected for 50 L using an air sampler (manufactured by MAS100 / Merck) outside the air curtain. As a result, the microorganism concentration was confirmed, and the detection of E. coli was confirmed. The culture medium obtained under each temperature condition was stored in an incubator at 35 ° C. per day, and the number of expressed colonies was confirmed. As a result, 1.0 × 10 ⁵ CFU (colony forming units) inside the air curtain and at room temperature. / ML, the outside of the air curtain is not heated (room temperature), 30 × 35 ° C., 38 ° C., 40 ° C., 45 ° C., 50 ° C., 5.0 × 10 ³ CFU / mL, 6.0 × 10 ² CFU / mL, (ND) not detected, (ND) not detected, (ND) not detected, (ND) not detected, and (ND) not detected.

  That is, the temperature condition is important for the antibacterial property of the air curtain, and preferably 25 to 50 ° C., including 25 ° C. corresponding to room temperature, more preferably 30 to 45 ° C., and further preferably 38 to 40 ° C. confirmed.

<Functional configuration of infection prevention system>
FIG. 6 shows a functional configuration of the infection prevention system. Some or all of the functions of each part shown in the figure are created in advance by a program or data and stored in a predetermined area of the memory 12. The CPU 11 implements the functions of the units shown in FIG. 6 by reading these program data from the memory 12 and executing the instructions.

  Referring to FIG. 6, the infection prevention system includes a control unit 100 corresponding to CPU 11 for centrally controlling other units, a storage unit 101 corresponding to memory 12, and an object in the vehicle (this embodiment). In this case, the target position detection unit 102 for detecting the position of a person such as a passenger), the manager notification unit 103 for reporting information to the manager (operator) who operates the computer 1, and each air curtain mechanism 2 are controlled. An air curtain control unit 105 is provided.

  The infection prevention system further includes a sensor output receiving unit 106 that receives outputs from various sensors of the sensor group 216, an image data receiving unit 107 that receives image data output from the CCD camera 32 and the plurality of infrared cameras 31, and an image data receiving unit. A target image processing unit 108 for processing image data from the CCD camera 32 received by the unit 107 is provided.

  The infection prevention system further communicates with an external computer 6 provided in each external institution to send a message to the external institution notification unit 109 for reporting predetermined information to the external computer 6, the in-vehicle display 33 or the out-of-vehicle display 34. A message output unit 110 for output, a lock control unit 111 for controlling the lock mechanism 35 related to the door for shielding the inside of the vehicle from the outside by the lock mechanism 35, and information displayed to an administrator who operates the computer 1 A display unit 112 such as a display and a request receiving unit 113. The request reception part 113 receives the request | requirement (request) of the action | operation of an air curtain mechanism by users, such as a passenger.

  The air curtain control unit 105 includes an air conditioning control unit 121 for controlling the air conditioning mechanism 21 of each air curtain mechanism 2. The air conditioning control unit 121 is a control amount determining unit 123 that determines control amounts (for example, voltage values to be applied) of the ozone generator 211, the PCI generator 212, the humidifier 213, the heater 214, and the cooler 215 of the air conditioning mechanism 21. And a switching unit 124 that selectively determines one of these devices to be operated and outputs a signal for operating the determined device. As described above, the switching unit 124 operates only the devices corresponding to heating / cooling at normal times. However, when an instruction to start the antibacterial air curtain is input, the ozone generator 211, the PCI generator 212, An operation start instruction is output to one or more of the humidifier 213, the heater 214, and the cooler 215, and the air curtain is switched to an antibacterial one.

  The message output unit 110 includes an emergency message output unit 125 for outputting an emergency message to the in-vehicle display 33 and the outside display 34 and an alarm message output unit 126 for outputting an alarm message. The emergency message output unit 125 outputs a message for notifying a situation where an emergency measure needs to be taken. The warning message output unit 126 outputs a warning message for informing people to be wary of danger imminence.

  The storage unit 101 is executed to realize the functions of the table TB1 searched based on the identification information output from the infrared camera 31, the tables TB2 and TB3 searched based on the seat number in the vehicle, and the temperature change image processing unit 120. Temperature conversion program PR0, ozone target data TD1 indicating target data for controlling the ozone concentration generated by the ozone generator 211, data TD2 indicating the target of the temperature of air adjusted by the heater 214, and a humidifier 213 Humidity target data TD3 for humidification adjusted by is stored.

  In addition, programs PG1, PG2, PG3, and PG4 executed by the air conditioning control unit 121 to control the operations of the ozone generator 211, the heater 214, and the humidifier 213 according to the corresponding target data TD1 to TD3 are provided. Stored in advance. The storage unit 101 stores seating chart image data 1011 referred to for notification by the administrator notification unit 103.

  Each program in the storage unit 101 is read by the CPU 11, and the operation of the corresponding part is controlled by executing the instruction.

  The table TB1 is connected to the air curtain mechanism 2 provided corresponding to the section to be photographed by the infrared camera 31 corresponding to the data D1 and data D1 of the camera number corresponding to the identification information of each infrared camera 31. Output terminal number data D2 indicating the output terminal (any one of the output terminals O1, O2, O3,...), Data D3 indicating the position in the vehicle of the section captured by the infrared camera 31, and the CCD camera CCD camera angle data D4, which indicates an angle for 32 to capture the section, is stored in advance.

  An output terminal (output terminal) to which the air curtain mechanism 2 provided corresponding to the section to which the seat belongs is connected to the table TB2 corresponding to the seat number data D5 and data D5 for identifying each seat in the vehicle. Data D6 of an output terminal number that designates any one of O1, O2, O3,... Is stored in advance.

  In the table TB3, data D9 of each seat number and image position data D10 indicating the position in the seating chart image data 1011 of the mark indicating the seat corresponding to the data D9 are stored in advance.

<Operation of infection prevention system>
With reference to FIG. 7, the process flowchart of the infection prevention system which concerns on this Embodiment is demonstrated. The program according to the process flowchart is stored in the storage unit 101 in advance, and the function of each unit is realized by the CPU 11 reading and executing the program.

  The process of FIG. 7 may be periodically repeated or may be started by some event (for example, an input of a start instruction by the operator via the input unit 13). It is assumed that a normal air curtain such as cooling or heating is supplied into the vehicle by each air curtain mechanism 2.

  First, the target position detection unit 102 causes each infrared camera 31 to perform a photographing operation (step S3). As a result, infrared rays emitted from an object or a living organism (person) serving as a heat source are detected by each infrared camera 31, and image data indicating the infrared intensity distribution is output. This image data is given to the temperature change image processing unit 120 via the image data receiving unit 107.

  The temperature change image processing unit 120 operates as a so-called thermography (step S5). In operation, when the image data indicating the infrared intensity distribution is input, the temperature change image processing unit 120 is based on the temperature conversion program PR0 read from the storage unit 101, and the temperature distribution based on the analysis of the infrared intensity from the input image data. Is detected, and infrared thermal image data is output based on the detection result. An image based on the infrared thermal image data (temperature distribution image data) is displayed on the display unit 112 or the like (step S7). An administrator (operator) can check the temperature distribution image in the vehicle detected by each infrared camera 31.

  The heat generation detection unit 122 of the target position detection unit 102 determines whether or not there is a temperature portion of 38 ° C. or higher in the image based on the detected temperature distribution image data (step S9). If it is determined that a temperature distribution of 38 ° C. or higher is not detected (NO in step S9), the series of monitoring processes is terminated. Here, although the monitor process is ended, the process may return to step S3 again and the subsequent processes may be repeated. Although 38 ° C. is used as a criterion, it may be higher or lower than this.

  On the other hand, when a temperature portion of 38 ° C. or higher is detected (YES in step S9), the target position detection unit 102 creates a table based on the identification information of the infrared camera 31 included in the image data indicating the temperature portion of 38 ° C. or higher. TB1 is searched, and data D2, D3, and D4 corresponding to data D1 indicating identification information are read (step S11). Based on the read data D3, position data of the temperature portion in the vehicle is output to the display unit 112 (steps S13 and S15).

  Of the read data, data D2 is provided to the air curtain control unit 105, and data D4 is provided to the target image processing unit 108. The target image processing unit 108 switches the imaging angle of the CCD camera 32 to an angle indicated by the data D4 based on the given CCD camera angle data D4 (step S19). As a result, the angle of the CCD camera 32 matches the angle at which the object (person) corresponding to the detected temperature distribution of 38 ° C. or higher can be photographed.

  The target image processing unit 108 inputs the image data captured by the CCD camera 32 whose angle has been switched through the image data receiving unit 107, and after performing predetermined processing such as noise removal, the target image processing unit 108 through the display unit 112. It is displayed (step S23). Thereby, the operator (monitoring person) can know the position within the vehicle which showed the temperature distribution of 38 degreeC or more. The condition can also be confirmed by an image of a person (including a face image).

  In this way, the detection result is transmitted only to a specific administrator. The administrator can confirm the area from the information. The target image processing unit 108 detects seat number data printed on the seat seat or the vehicle by pattern matching from the captured image data of the CCD camera 32, and outputs the detected seat number to the administrator notification unit 103. The administrator reporting unit 103 displays a seat list in the vehicle based on the seating chart image data 1011 read from the storage unit 101 on the display unit 112. Further, the table TB3 is searched based on the input seat number, and data D10 corresponding to the data D9 matching the seat number is read out. Based on the data of the image position indicated by the read data D10, a warning is displayed by electronically blinking and displaying a seat mark corresponding to the image position in the displayed seat list. Thereby, an area can be specified promptly and reliably.

  The switching unit 124 of the air curtain control unit 105 supplies the output terminal number data D2 to the air curtain controller 7 and outputs a control signal for switching the air curtain to the antibacterial air curtain to the air curtain controller 7. (Step S25).

  The signal generation unit 71 of the air curtain controller 7 generates a control signal including the output terminal number of the data D2 and outputs it to the output I / F 72. The output I / F 72 outputs a control signal to the corresponding air curtain mechanism 2 via an output terminal (any one of the output terminals O1, O2, O3...) Indicated by the output terminal number of the given control signal. To do. Thereby, the down flow of the air curtain mechanism 2 corresponding to the position in the vehicle of the data D3, that is, the position where a person of 38 ° C. or higher is present can be switched to the antibacterial air curtain (see FIG. 9). The operation of the air curtain mechanism 2 (FIG. 8) will be described later.

  Thereafter, the emergency message output unit 125 displays an emergency message indicating that a person of 38 ° C. or higher is detected on the in-vehicle display 33 as shown in FIG. 10 (step S27). Displaying the message of FIG. 10 is not necessary when the person who is ill is not particularly distracted by the people around him, but for example, the condition of the person who is ill suddenly changes in the vehicle, indicating abnormal behavior. In this case, it functions as an emergency in-vehicle display that condemns only the surrounding passengers.

  For example, when moving to the next vehicle, there is an antibacterial air curtain above the door on the side of the vehicle where the sick person is located. Can prevent infection.

  Thereafter, under the control of the lock control unit 111, the lock mechanism 35 related to the door of the vehicle locks the door so as to block people from entering and exiting from the outside (step S29). This provides a lockout mechanism for controlling an accused route in an emergency, or for preventing a person from getting close to the sick person.

  Subsequently, a warning message is displayed on the outside display 34 by the warning message output unit 126 as shown in FIG. 11 (step S31). As a result, the reason why the door is locked and closed can be displayed as a message to an external passenger or the like, and entry / exit of a new person can be restricted in an emergency. For example, if the condition of a person who has become sick in a vehicle suddenly changes and shows abnormal behavior, it is possible to avoid unnecessary confusion by displaying that there is a person who is sick in the vehicle at the station. Can do.

  In addition, if there is a waiting on the train, if the door in front of the waiting customer does not open, there is a possibility of confusion if the reason is not clear. Such confusion can be avoided.

  Subsequently, the external engine notification unit 109 notifies the external engine computer 6 by data communication that a heated person has been detected in the vehicle (step S33). At this time, in order to notify the health center, medical institution, fire department, etc. of the external organization of the condition of the person who is generating heat, image data taken by the CCD camera 32 may be transmitted as shown in FIG. Step S35).

  Image data based on an image recognition result using the CCD camera 32 (or a small X-ray camera) is transmitted in conjunction with a report to a health center, a clinic, a hospital, or a fire department in an emergency. Thereby, for example, when the condition of the person who becomes ill suddenly changes in the vehicle, it is possible to temporarily treat the ill person from this image data. In some cases, infection may spread due to delays in the initial diagnosis. On the other hand, remote diagnosis based on images is very effective in terms of preventing secondary infection.

  The operation of the air curtain mechanism 2 instructed to switch to the antibacterial air curtain will be described with reference to FIG.

  The control amount determining unit 123 inputs the detection result of the sensor group 216 via the sensor output receiving unit 106 (step S47). The input value is compared with each of the target data TD1 to TD3 read from the storage unit 101, and the difference between the current detection value and the target data TD1 to TD3 is detected based on the comparison result (step S49). A control amount is determined based on the difference.

  The air conditioning control unit 121 controls each device based on the determined control amount and the programs PC1 to PC4 read from the storage unit 101. Thereby, the air curtain which the air curtain mechanism 2 outputs is switched to an antibacterial air curtain.

  Thereafter, the process returns to step S47, and the subsequent processes are similarly performed. Thus, the feedback control is performed so that the ozone concentration, temperature, and humidity detected in the antibacterial air curtain are brought close to the target data TD1 to TD3, thereby promptly providing an air curtain having an effective antibacterial effect, Thereafter, the antibacterial effect can be maintained.

  As described above, when a fever is detected, the antibacterial air curtain is switched to isolate the infected person. The process so far is normal processing. During this normal process, the process proceeds without being noticed not only by the infected but also by the surrounding people. However, when the condition of an infected person suddenly changes, a process is started that quickly moves nearby passengers to another place and prevents new people from entering. In addition, an image of the condition of the infected person is transferred to a computer 6 of an external specialized institution such as a health center or a clinic, and a process for initial diagnosis is started.

  By switching to the above-described antibacterial air curtain, it is possible to quickly shield infected persons from non-infected persons, which is effective against pandemics.

(Supply of antibacterial air curtain upon request>
The above-described antibacterial air curtain is supplied only in a specific area detected by monitoring the inside of the vehicle, but the method for specifying the area to be supplied is not limited to this.

  For example, if people with a high level of hygiene desire a space that is shielded from the outside area with their antibacterial air curtain in public places, for example, when issuing tickets or providing personal ID (Identification) information to public institutions Thus, the system shown in FIG. 1 and FIG. 6 may be a system that obtains a space cleaning area for itself by specifying its own position in a public place. FIG. 13 shows a supply image of the antibacterial air curtain in that case. In particular, as a public place, when a seat is uniquely determined by a ticket such as an airplane or a bullet train, it is convenient to specify the position.

  Referring to the flowchart of FIG. 14, when the user requests the supply of the antibacterial air curtain, the request is input through the request reception unit 113 together with the seat number of the boarding ticket (or boarding pass) (step S71). .

  When the input of the request is detected, the target position detection unit 102 searches the table TB2 based on the seat number input together with the request, reads out the data D6 corresponding to the data D5 matching the seat number, and the air curtain control unit It outputs to 105 (step S73).

  The switching unit 124 of the air curtain control unit 105 supplies the output terminal number data D6 to the air curtain controller 7 and outputs a control signal for switching the air curtain to the antibacterial air curtain to the air curtain controller 7. (Step S75).

  The signal generation unit 71 of the air curtain controller 7 generates a control signal including the output terminal number of the data D6 and outputs it to the output I / F 72. The output I / F 72 outputs a control signal to the corresponding air curtain mechanism 2 via an output terminal (any one of the output terminals O1, O2, O3...) Indicated by the output terminal number of the given control signal. To do. Thereby, the air curtain of the air curtain mechanism 2 corresponding to the user's seat is switched to the antibacterial air curtain (see FIG. 13). The operation of the air curtain mechanism 2 in this case is as described with reference to FIG.

(Other embodiments)
In the above-described embodiment, the supply area of the antibacterial air curtain is detected by thermography in an area having a spatial spread in a public place, but the area detection method is not limited to that based on the human condition (temperature: body temperature). . For example, the supply area may be detected based on the detection result of the state of air in a public place, that is, the state of microorganisms floating in the air. Specifically, when assuming extremely high concentrations of microorganisms, such as bioterrorism, the number of pseudo microorganisms counted by particle counters installed in each area of public places and particle counters It is also possible to detect the area based on the installation location using the detection results of the monitoring device provided in each public area of microorganisms such as mold combined with the device that monitors fluorescence excited by ultraviolet rays and ultraviolet rays is there. It is also possible to detect the area using the detection result of the odor sensor that identifies the microorganism from the type of metabolite gas produced by the microorganism.

(Effect of embodiment)
According to this embodiment, an infection prevention system that combines a disease monitoring system for a heating element in a public place supplies an antibacterial air curtain based on specific position information, so that the public place is large. Even if it is a space, it is possible to cope with minimizing the influence of the biohazard pandemic caused by microorganisms.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 Computer, 2 Air curtain mechanism, 3 Monitor mechanism, 4, 5 Communication line, 6 External computer, 7 Air curtain controller, 21 Air conditioning mechanism, 31 Infrared camera, 32 CCD camera, 33 In-car display, 34 Outside display, 35 Lock mechanism , 211 Ozone generator, 212 PCI generator, 213 humidifier, 214 heater, 215 cooler, 216 sensor group, 221 fan group, 102 target position detection unit, 103 administrator notification unit, 105 air curtain control unit, 106 Sensor output receiving unit, 109 External engine reporting unit, 110 Message output unit, 111 Lock control unit, 113 Request receiving unit, TB1, TB2, TB3 table, PRO temperature conversion program.

Claims (14)

An air curtain device that sends out an air curtain into a housing portion that houses a person,
An air curtain generating section for sending out the antibacterial air curtain to a predetermined position inside the accommodating section indicated by a given command;
A state detection unit provided in association with each position inside the storage unit in order to detect the state of a person stored in the storage unit or the state of air inside the storage unit;
Based on state information indicating the state detected by the state detection unit, a position detection unit that detects the position where the state indicates a predetermined state; and
An air curtain device, comprising: an air curtain control unit that outputs the command for instructing the position detected when the position detection unit indicates the predetermined state as the predetermined position to the air curtain generation unit. The air curtain device
A reception unit that receives a request for outputting the command to the air curtain generation unit;
The air curtain device according to claim 1, wherein information on the predetermined position indicated by the command is included in advance in the received request. The air curtain generator is
The air curtain device according to claim 1, which delivers the antibacterial air curtain adjusted for one or more of ozone concentration, heating, inclusion of ions, and humidification.   The air curtain device according to claim 3, wherein when adjustment is performed by the humidification, a relative humidity of the antibacterial air curtain is adjusted to be in a range of 50% to 100%.   The air curtain device according to claim 3, wherein the temperature of the antibacterial air curtain is adjusted to be in a range of 25 ° C. to 50 ° C. when adjusted by the heating.   The air curtain device according to claim 5, wherein the air around the antibacterial air curtain is cooled. An infection prevention system including an air curtain device that sends out an air curtain inside a housing portion that houses a person,
The air curtain device
An air curtain generating section for sending out the antibacterial air curtain to a predetermined position inside the accommodating section indicated by a given command;
A state detection unit provided in association with each position inside the storage unit in order to detect the state of a person stored in the storage unit or the state of air inside the storage unit;
Based on state information indicating the state detected by the state detection unit, a position detection unit that detects the position where the state indicates a predetermined state; and
An infection prevention system, comprising: an air curtain control unit that outputs to the air curtain generation unit the command for instructing the position detected when the position detection unit indicates the predetermined state as the predetermined position. The air curtain device
A reception unit that receives a request for outputting the command to the air curtain generation unit;
The infection prevention system according to claim 7, wherein the information on the predetermined position indicated by the command is included in advance in the received request. An imaging unit that captures the position detected when the position detection unit indicates the predetermined state as an imaging range;
The infection prevention system according to claim 7, further comprising: a display unit that displays an image based on image data output by the imaging unit.   The infection prevention system of Claim 9 which detects and outputs the information which pinpoints the position detected when the said position detection part points out the said predetermined state from the said image data by processing the said image data. An inner output unit that outputs information toward the inside of the housing unit;
8. The infection prevention system according to claim 7, wherein when the position indicating the predetermined state is detected by the position detection unit, a first predetermined message is output from the inner output unit. A shielding part for shielding the inside of the housing part from the outside;
The infection prevention system according to claim 7, wherein when the position indicating the predetermined state is detected by the position detection unit, the inside of the housing unit is shielded from the outside by the shielding unit. An outer output unit that outputs information toward the outside of the housing unit;
The infection prevention system according to claim 7, wherein when the position indicating the predetermined state is detected by the position detection unit, a second predetermined message is output from the outer output unit. A communication unit that communicates with a computer of an external organization of the infection prevention system;
The infection prevention system according to claim 7, wherein the communication unit transmits a predetermined notification to the computer when the position detection unit detects the position where the state indicates the predetermined state.

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