TW202217202A - Spatial sterilization system - Google Patents

Abstract

The present invention efficiently spreads a mist throughout the entirety of a large space. The spatial sterilization system 100 according to the present invention comprises a spraying device 10 mounted on air-conditioning equipment 50, and a control device 20. The air-conditioning equipment 50 recovers, via a return air duct 52, air fed to a space V from air supply ducts 53, and thereby circulates air in the space V. The spraying device 10 is formed so as to spray a sterilization liquid as a mist M atomized to a particle diameter enabling the sterilization liquid to disperse in the air in the space V in a liquid particle state, and feed the mist M to the space V via the air supply ducts 53. The control device 20 controls the amount of the mist fed to the space V by the spraying device 10 such that the mist M diffuses into the air in the space V.

Description

Space sterilization system

The present invention relates to a space sterilization system for use in sterilization of large spaces with air-conditioning equipment circulating air.

Patent Document 1 discloses a spray device that sprays a liquid with a sterilizing effect (sterilizing liquid) in the form of a mist, and is provided with a blower, an ultrasonic vibrating member and a baffle to stabilize the degree of Brownian motion. The technology to generate mist of small particle size.

Moreover, in patent document 2, in the air conditioner used when making room air comfortable, the technique which blows out the mist (mist) from an air supply duct to an indoor space is disclosed. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Specification of Japanese Patent No. 6742046 [Patent Document 2] Japanese Patent Laid-Open No. 2014-092336

[Problems to be Solved by Invention]

It is presumed that the spray device described in Patent Document 1 is intended to be installed in a small space (meeting room, staff room of a commercial facility, etc.: for example, a space with a floor area of 100 m ² or less), and is not intended to be installed in a large space (large Scale offices, factories, music facilities, cinemas, logistics facilities, etc.: for example, a larger space ^than the floor area of 100 m2). That is, even if the spray device described in Patent Document 1 is installed in a large space in which air is circulated by an air conditioner, it is difficult for the mist to spread over the entire space.

On the other hand, even if the air-conditioning apparatus described in Patent Document 2 is applied to a large space, the mist still falls on the inner wall or floor of the air supply duct before the mist spreads over the entire large space, and it is difficult to effectively remove the mist. throughout the entire space.

An object of the present invention is to provide a space sterilization system that can effectively spread mist throughout a large space. [Technical means to solve problems]

The space sterilization system of the present invention is characterized by comprising: a spray device configured to be attached to an air conditioner for circulating air in the space by recovering the air supplied to the space from the air supply duct through the return air duct, And the sterilizing liquid is sprayed as a mist of a particle size that can be dispersed in the air in the space in the state of liquid particles, and the mist is supplied to the space through the air supply pipe; and a control device, which uses the mist to In the manner of diffusing in the air in the space, the amount of the mist supplied by the spray device to the space is controlled.

According to the present invention, the mist having a particle size that can be dispersed in the air in the space in the state of liquid particles is sprayed by the spray device, and the mist is supplied to the space through the air supply pipe. The control device controls the supply amount of the mist in the space by the spray device so that the mist is diffused in the air in the space. In this way, the mist can stay in the space in the state of aerosol (liquid particles dispersed in the gas), and the mist is transported by the air supplied by the air supply pipe, thereby effectively making the mist spread over a large area. the entire space.

Preferably, the particle size is less than 3 µm (more preferably 0.3-0.5 µm). In this case, by Brownian motion, the fog can be rapidly diffused in the air without settling, so that the fog can be more effectively spread over a large entire space. Specifically, the mist can be made to reach a distance without falling on the inner wall or the floor of the air supply duct before it spreads over the entire larger space.

Preferably, the spraying device is disposed outside the air-conditioning equipment, and further includes: a spraying pipe that connects the spraying device and the air-conditioning equipment so as to supply the mist to the air supply duct; and communicates with the air-conditioning equipment. A pipe, which communicates the above-mentioned spray device with the space in the above-mentioned air-conditioning apparatus. When the spraying device is arranged outside the air-conditioning equipment, the air supply pressure is generated in the air-conditioning equipment during the operation of the air-conditioning equipment. An issue where mist ejection could not be performed properly. In this regard, in this configuration, the spray device is communicated with the space in the air-conditioning equipment through the communication pipe, so that even if the air supply pressure is generated during the operation of the air-conditioning equipment, the above-mentioned differential pressure is not generated, and it is appropriate to Execute the spray of mist.

Preferably, the control device controls the spray device so as to intermittently spray the mist. If the mist is continuously sprayed, the amount of mist in the air supply duct will increase and the humidity will rise. At this time, the particles of the mist adhere to the inner wall of the air supply duct due to condensation, and there is a problem that the mist is not supplied to the space. In this regard, in this configuration, by intermittently spraying the mist, the increase in humidity can be suppressed, and the above-mentioned dew condensation can be suppressed. Thereby, the problem that the particles of the mist adhere to the inner wall of the air supply duct and the mist cannot be supplied to the space can be suppressed, so that the mist can be spread over the entire large space more reliably and effectively.

Preferably, the space sterilization system of the present invention includes a plurality of the above-mentioned spraying devices, and when the above-mentioned control device controls each of the above-mentioned plurality of spraying devices so as to intermittently spray the above-mentioned mist, one of the above-mentioned plurality of spraying devices is preferred. At least one of them maintains the state of spraying the above-mentioned mist. In this case, the problem that the particles of the mist adhere to the inner wall of the air supply pipe and the mist is not supplied to the space can be suppressed, and the amount of particles in the space can be maintained by not setting the time during which the entire plurality of spraying devices do not spray the mist. Above the specified level, a higher sterilization effect can be continuously obtained.

Preferably, the spray device includes a blower for supplying the mist to the air supply duct, and the control device controls the supply amount by adjusting the rotation number of the blower based on the volume of the space. Thereby, the supply of mist corresponding to the volume of the space in which the space sterilization system is applied can be realized. That is, the fog can be spread over the entire space more reliably.

Preferably, the said control apparatus adjusts the rotation number of the said blower based on the volume of the said space, and at least one of the diameter and length of the said air supply duct. Thereby, in addition to the volume of the space of the application space sterilization system, the appropriate supply of mist corresponding to the configuration of the air conditioning equipment of the application space sterilization system can be realized. That is, the fog can be made to pervade the entire space more reliably.

Preferably, the control device adjusts the rotation number of the blower based on the volume of the space and the diameter and length of the air supply duct. Thereby, in addition to the volume of the space of the application space sterilization system, a more appropriate supply of mist corresponding to the configuration of the air conditioning equipment of the application space sterilization system can be realized. That is, the fog can be made to pervade the entire space more reliably. [Effect of invention]

According to the present invention, the mist having a particle size that can be dispersed in the air in the space in the state of liquid particles is sprayed by the spraying device, and the mist is supplied to the space through the air supply pipe. The control device controls the supply amount of the mist in the space by the spray device so that the mist is diffused in the air in the space. In this way, the mist can stay in the space in the state of aerosol (liquid particles dispersed in the gas), and the mist is transported by the air supplied by the air supply pipe, thereby effectively making the mist spread over a large area. the entire space.

<First Embodiment> First, the space sterilization system 100 according to the first embodiment of the present invention will be described.

<The overall structure of the system> As shown in FIG. 1 , the space sterilization system 100 includes a spray device 10 attached to an air conditioner 50 , and a control device 20 that controls the air conditioner 50 and the spray device 10 .

The air-conditioning apparatus 50 is installed with respect to a larger space (large-scale office, factory, music facility, movie theater, logistics facility, etc.: for example, a space larger than a floor area of 100 m ² ) V. The space V includes a plurality of rooms V1 to V6 separated by partitions.

The air conditioning equipment 50 has an external air duct 51 , a return air duct 52 , an air supply duct 53 , an electric dust collector 55 , a hot and cold water coil 56 , a humidifier 57 , and a blower fan 58 .

Inside the air conditioning equipment 50 , outside air (OA: Outdoor Air) is supplied through an outside air duct 51 , and air (RA: Return Air) recovered from the space V is supplied through a return air duct 52 .

The outside air (OA: Outdoor Air) and the air (RA: Return Air) inputted as described above are sent to the electric dust collector 55 , and foreign matter such as dust is removed by the electric dust collector 55 , and then sent to the hot and cold water coil 56 . In addition, the air dehumidified by the hot and cold water coil 56 and humidified by the humidifier 57 is sent into the room 60 where the blower fan 58 is arranged, and is supplied to each room through the air supply duct 53 by the drive of the blower fan 58 V1~V6. In addition, the hot and cold water coil 56 can be cooled and dehumidified in summer, and can be heated in winter. Alternatively, the hot and cold water coils 56 can be cooled and dehumidified throughout the year.

The chamber 60 is provided with a suction port 53x of the air supply duct 53, and a blower fan 58 is provided at the suction port 53x. The flow rate of the air (SA: Supply Air) supplied to each room V1-V6 through the air supply duct 53 is adjusted by making the control apparatus 20 control the drive of the blower fan 58.

The spraying device 10 is arranged in the chamber 60, and is configured to spray the sterilizing liquid as a mist M, and supply the mist M to each of the rooms V1 to V6 through the air supply duct 53 from the suction port 53x.

The specific configuration of the spray device 10 will be described later with reference to FIGS. 2 and 3 .

The air supply duct 53 is branched into plural numbers from the suction port 53x, and extends to the air outlet 53y provided on the ceiling surface of each room V1-V6. The longest duct length (the duct length from the suction port 53x to the air outlet 53y of each room V1) among the duct lengths from the suction port 53x to the air outlet 53y of each room V1 to V6 is, for example, about 30 m.

The air supplied to the rooms V1 to V6 through the air supply duct 53 is recovered by the return air duct 52 . That is, the air conditioning equipment 50 is configured to circulate the air in the space V by recovering the air supplied to the space V from the air supply duct 53 by the return air duct 52 .

The air (SA: Supply Air) supplied from the air supply duct 53 to each of the rooms V1 to V6 includes the mist M sprayed by the spray device 10 .

The control device 20 controls each part of the air conditioning equipment 50 by adjusting the temperature and humidity of the rooms V1-V6, and controls the spraying device 10 to the space V in such a way that the mist M diffuses into the air of the rooms V1-V6. The supply amount of mist M. Specifically, the supply amount of the mist M is controlled according to the voltage of the atomizing unit 12 of the spray device 10 to be described later or the rotation number of the blower 13 (see FIG. 3 ). In addition, the control of the supply amount of the mist M means, for example, controlling the supply amount (number of particles) of the mist M per unit volume of the space V in a unit time.

In this embodiment, the control apparatus 20 controls the spray apparatus 10 so that the mist M may be sprayed intermittently. For example, the control device 20 controls the spray device 10 so that after the spray device 10 continuously sprays the mist M for 30 minutes, the spray device 10 does not spray the mist M (ie, the spray amount of the mist M is zero) for 30 minutes.

<Constitution of spray device> Next, the configuration of the spray device 10 will be specifically described with reference to FIGS. 2 and 3 .

As shown in FIG. 2, the spray device 10 has a frame body 10c, a spray port 10x and a shutter 10y provided on the upper part of the frame body 10c.

As shown in FIG. 3 , the spray device 10 includes a storage tank 11 for storing the sterilizing liquid in the frame body 10c, an atomizing unit 12 for atomizing the sterilizing liquid stored in the storage tank 11 to generate fine particles (mist M), and an atomizing unit 12 for conveying the A blower 13 for supplying air to the storage tank 11, a baffle plate 14 arranged to receive the liquid column generated in the atomizing unit 12, a storage tank unit 15 for storing the sterilization liquid supplied to the storage tank 11, and the storage tank unit 15 and the storage tank 11. The supply pipe 16 that communicates with, the supply pump 17 that sends the sterilizing solution from the storage tank unit 15 to the storage tank 11 via the supply pipe 16, the delivery pipe 18 that communicates the storage tank 11 and the spray port 10x, and the electric power for supplying electric power to each part of the spray device 10 The unit 19 (refer to FIG. 4 ), and the control unit 20u (refer to FIG. 4 ) that controls each part of the spray device 10 . The control unit 20u is controlled by the control device 20 . The above-mentioned supply amount of the mist M or the intermittent ejection of the mist M is realized by the control device 20 controlling the control unit 20u.

The sterilizing liquid stored in the storage tank 11 and the storage tank unit 15 is a liquid with a sterilizing effect (that is, the effect of sterilizing bacteria or viruses suspended in the space V), such as chlorous acid water, hypochlorous acid water, sodium hypochlorite, Alcohol etc. The chlorous acid water is used, for example, diluted to about 200 ppm.

The storage tank unit 15 is arranged on the upper part of the frame body 10c, and the storage tank 11 and the atomization unit 12 are arranged at the lower part of the frame body 10c.

The shutter 10y can be opened and closed, and the sterilizing liquid can be supplied to the storage tank unit 15 by opening the shutter 10y. The sterilizing liquid in the storage tank unit 15 is supplied to the storage tank 11 through the supply pipe 16 by the drive of the supply pump 17 .

The atomizing unit 12 includes a plurality of ultrasonic vibration elements disposed at the bottom of the storage tank 11 . Each ultrasonic vibrating element operates by the electric power supplied from the electric power unit, and emits ultrasonic waves. At this time, a liquid column is generated above the ultrasonic vibration member.

The blower 13 is driven by the electric power supplied from the electric power unit, and supplies the conveying air into the storage tank 11 . The delivery air is sent out of the storage tank 11 together with the fine particles (mist M) atomized by the atomizing unit 12 in the storage tank 11 , and is sent to the spray port 10x through the delivery pipe 18 .

The baffle plate 14 is a plate-shaped member made of stainless steel, etc., and receives the liquid column generated in the atomizing unit 12, and separates the particles with larger particle size and the particles with smaller particle size contained in the liquid column. Specifically, particles with larger particle diameters contained in the liquid column collide with the baffle plate 14 and return to the storage tank 11 . On the other hand, particles with a small particle size contained in the liquid column are suspended in the vicinity of the baffle plate 14 , are sent out of the storage tank 11 together with the conveying air supplied by the blower 13 , and are sprayed through the sending pipe 18 to the outside of the storage tank 11 . Port 10x delivery.

The mist M sprayed from the spray port 10x is a particle size (less than 3 µm, preferably 0.1 to 1.0 µm, more preferably 0.3 µm) that can be dispersed in the air in the space V (see Fig. 1 ) in the form of liquid particles. ~0.5 µm), and stay in the air in space V in the state of aerosol (particles of liquid dispersed in gas). By staying in the air in the space V for a long time, the mist M increases the probability of contact with bacteria or viruses, thereby enhancing the sterilization effect. In addition, the mist M is effective for sterilization of bacteria or viruses having a particle size similar to the particle size of the mist M.

In addition, as a single unit of the spray device 10, for example, it has a maximum spray capacity of about 1.2 L/h, and is suitable for small spaces (meeting rooms, staff rooms of commercial facilities, etc.: for example, a space with a floor area of 100 m ² or less) effective in sterilization. In the present embodiment, by supplying the mist M sprayed by the spraying device 10 to the space V through the air supply duct 53 (see FIG. 1 ), it is possible to apply the mist M to a large space (large-scale office, factory, music facility, movie theater, logistics facility, etc.). : For example, a space larger ^than the floor area of 100 m2) V is effective for sterilization.

As shown in FIG. 4 , the control device 20 is composed of a CPU (Central Processing Unit) 21 , a ROM (Read Only Memory) 22 and a RAM (Random Access Memory) 23 . And it is electrically connected to each part of the air conditioning equipment 50, the control unit 20u of the spray device 10, and the like. The control device 20 adjusts the voltage of the atomizing unit 12 and the rotation number of the blower 13 based on the volume of the space V and the diameter and length of the air supply pipe 53 , thereby controlling the amount of the mist M supplied by the spray device 10 to the space V.

For example, the ROM 22 stores a graph showing the relationship among the volume of the space V, the diameter of the air supply duct 53, the length of the air supply duct 53, the voltage of the atomizing unit 12, and the rotation number of the blower 13. After the spraying device 10 is installed in the air conditioning equipment 50, when the operator inputs the volume of the space V, the diameter of the air supply duct 53, and the length of the air supply duct 53 through the input part (the drawing is omitted), the CPU 21 stores it in the ROM 22. The above graph captures the voltages and rotations corresponding to the input data. Next, the CPU 21 uses the voltage of the atomizing unit 12 as the voltage, and drives the blower 13 at the rotational speed.

Alternatively, the ROM 22 stores a formula for deriving the voltage of the atomizing unit 12 and the rotation number of the blower 13 according to the volume of the space V, the diameter of the air supply duct 53, and the length of the air supply duct 53. After the spray device 10 is installed in the air conditioning equipment 50, the operator inputs the volume of the space V, the diameter of the air supply pipe 53, and the length of the air supply pipe 53 through the input part (the drawing is omitted), and the CPU21 will input the data. The voltage and the number of revolutions are derived by applying the above-mentioned derived formula memorized in the ROM 22 . After that, the CPU 21 uses the voltage of the atomizing unit 12 as the voltage, and drives the blower 13 at the rotational speed.

In addition, in this embodiment, the control apparatus 20 makes the spray apparatus 10 and the air conditioner 50 cooperate. Specifically, the control device 20 starts the operation of the spraying device 10 when the operation of the air-conditioning equipment 50 is started, and stops the operation of the spraying device 10 when the operation of the air-conditioning equipment 50 is stopped. The operation of the air-conditioning apparatus 50 is controlled based on a signal from a temperature sensor or a humidity sensor (not shown) provided in the space V, and/or an input from an operator via an input unit (not shown). For example, the operator may instruct the intermittent operation corresponding to the temperature and humidity of the space V as the operation of the air-conditioning apparatus 50 .

The space sterilization system 100 is further provided with the emergency stop switch 91, the display 92, and the speaker 93, as shown in FIG. 4, and the control apparatus 20 is also electrically connected to these. For example, when an abnormality occurs in each part of the space sterilization system 100 (failure of the blower fan 58 or blower 13, leakage of sterilizing liquid from the spray device 10, etc.), or a power failure occurs in the building where the space sterilization system 100 is installed When the operator of the space sterilization system 100 presses the emergency stop switch 91, the control device 20 receives the signal from the emergency stop switch 91, and according to the reception of the signal, makes each part of the air conditioning equipment 50 and the spray device 10 The drive is stopped, and the emergency stop is notified through the display 92 and the speaker 93 . The display 92 and the speaker 93 are provided inside and/or outside the air-conditioning apparatus 50 .

<Configuration and effects of the present embodiment> As described above, according to the present embodiment, the mist M having a particle size that can be dispersed in the air in the space V in the state of liquid particles is sprayed by the spray device 10 , and the mist M is supplied through the air supply duct 53 to space V. The control device 20 controls the supply amount of the mist M in the space V from the spraying device 10 so that the mist M is diffused in the air in the space V. In this way, the mist M can be kept in the space in the state of aerosol (particles of liquid dispersed in the gas), and the mist M can be transported by the air supplied from the air supply duct 53, whereby the mist M can be effectively made throughout the larger entire space V.

The particle size of the mist M is less than 3 µm (preferably 0.3 to 0.5 µm). In this case, the mist M is rapidly diffused in the air without settling due to Brownian motion, so that the mist M can be more effectively spread throughout the larger entire space V. Specifically, the mist M can be made to reach a distance (for example, to a distance of about 30 m) without falling on the inner wall or the floor of the air supply duct 53 before covering the larger entire space V.

The control apparatus 20 controls the spray apparatus 10 so that the mist M may be sprayed intermittently. When the mist M is continuously sprayed, the amount of the mist M in the air supply duct 53 increases, and the humidity increases. In this case, the particles of the mist M adhere to the inner wall of the air supply duct 53 due to dew condensation, and the problem that the mist M is not supplied to the space V arises. In this regard, in the present embodiment, by intermittently spraying the mist M, the increase in humidity can be suppressed, and the above-mentioned dew condensation can be suppressed. Thereby, the particle of the mist M can be prevented from adhering to the inner wall of the air supply duct 53 and the mist cannot be supplied to the space, so that the mist M can be spread over the entire large space V more reliably and effectively.

The air conditioner 50 includes the blower 13 that supplies the mist M to the air supply duct 53 . The control device 20 controls the supply amount by adjusting the rotation number of the blower 13 based on the volume of the space V. Thereby, the supply of the mist M corresponding to the volume of the space V in which the space sterilization system 100 is applied can be realized. That is, the fog M can be spread over the entire space V more reliably.

The control device 20 adjusts the rotation number of the blower 13 based on at least one of the volume of the space V and the diameter and length of the air supply duct 53 . Thereby, in addition to the volume of the space V of the application space sterilization system 100 , appropriate supply of the mist M corresponding to the configuration of the air conditioning equipment 50 of the application space sterilization system 100 can be realized. That is, the fog M can be spread over the entire space V more reliably.

The control device 20 adjusts the rotation number of the blower 13 based on the volume of the space V and the diameter and length of the air supply duct 53 . Thereby, in addition to the volume of the space V of the application space sterilization system 100, a more appropriate supply of the mist M corresponding to the configuration of the air conditioning equipment 50 of the application space sterilization system 100 can be realized. That is, the fog M can be spread over the entire space V more reliably.

<Second Embodiment> Next, the space sterilization system 200 according to the second embodiment of the present invention will be described.

In the space sterilization system 100 (refer to FIG. 1 ) according to the first embodiment, the spray device 10 is disposed inside the air-conditioning apparatus 50 . On the other hand, in the space sterilization system 200 (see FIG. 5 ) according to the second embodiment, The spray device 10 is arranged outside the air conditioning equipment 50 .

Hereinafter, regarding the space sterilization system 200 of the second embodiment, the description of the same configuration as that of the first embodiment will be omitted, and the configuration different from that of the first embodiment will be described.

The spray device 10 is configured such that a spray pipe 61 is attached to the spray port 10x, and the mist M sprayed from the spray port 10x is sent to the chamber 60 through the spray pipe 61, and further supplied to the rooms V1 to V6 from the suction port 53x through the air supply duct 53 .

Moreover, the communication pipe 62 is attached to the spray apparatus 10, and the space in the air-conditioning apparatus 50 is communicated with the floating tank 11f (refer FIG. 6) via the communication pipe 62. As shown in FIG. In this embodiment, in order to detect the remaining amount of the storage tank 11, as shown in Figs. When the operation of the air-conditioning equipment 50 is stopped, since the supply air pressure is not generated, as shown in FIG. 6(a), the pressure inside the storage tank 11 and outside the storage tank 11 is atmospheric pressure, and the liquid level in the storage tank 11 and the liquid level in the floating tank 11f are all at atmospheric pressure. at the same level. On the other hand, when the air-conditioning equipment 50 is in operation, since the supply air pressure is generated in the air-conditioning equipment 50, if the communication pipe 62 is not provided, the pressure in the storage tank 11 decreases as shown in FIG. The liquid level rises, while the liquid level of the float tank 11f provided outside the storage tank 11 falls. In this case, there is a problem that a problem occurs in the detection of the remaining amount of the float tank 11f, and the ejection of the mist M cannot be properly performed. In this regard, in the present embodiment, by connecting the floating tank 11f with the space in the air conditioning equipment 50 through the communication pipe 62, even when the air conditioning equipment 50 is operated, the air supply pressure is generated, as shown in Fig. 6(a) The pressure in the storage tank 11 and outside the storage tank 11 is the same as that of the space in the air conditioning equipment 50, and the liquid level in the storage tank 11 and the liquid level in the floating tank 11f are at the same level, so that the mist M can be properly sprayed.

In addition, in the first embodiment (refer to FIG. 1 ), since the spray device 10 is arranged inside the air-conditioning equipment 50 and the above-described differential pressure is not generated, the communication pipe 62 is not required.

<Third Embodiment> Next, the space sterilization system 300 according to the third embodiment of the present invention will be described.

In the space sterilization system 100 (see FIG. 1 ) of the first embodiment, one spray device 10 and one air conditioner 50 are provided with respect to the space V, but the space sterilization system 300 of the third embodiment (see FIG. 1 ) In FIG. 7 ), with respect to the space V, four sets of sets including the spraying unit 10u (see FIG. 8 ) having three spraying devices 10 and one air-conditioning apparatus 50 are provided. Furthermore, in the first embodiment, the space V is divided into a plurality of rooms V1 to V6, but in the third embodiment, the space V is not divided, and is, for example, a large space with a floor area of about 750 m ² .

Hereinafter, regarding the space sterilization system 300 of the third embodiment, the description of the same configuration as that of the first embodiment will be omitted, and the configuration different from that of the first embodiment will be described.

As shown in FIG. 8 , each spray unit 10u includes a frame body 30 and a control unit 20u provided on the side of the frame body 30 . On the side part of the housing|casing 30, the above-mentioned emergency stop switch 91 and the display 92 (refer FIG. 4) are further provided.

The inner space of the frame body 30 is divided into an upper space 30a and a lower space 30b by the partition plate 31 .

A stock solution storage tank 32 and a dilution solution storage tank 33 are arranged in the upper space 30a. The stock solution of the sterilization liquid is stored in the stock solution storage tank 32 . The dilution liquid storage tank 33 communicates with the raw liquid storage tank 32 via a supply pump 34, and also communicates with a tap water storage tank (not shown) via another pump. For the dilution liquid storage tank 33, the original liquid in the original liquid storage tank 32 is supplied by the driving of the supply pump 34, and the tap water in the tap water storage tank is supplied by the driving of the above-mentioned other pump, and the original liquid and the tap water are mixed in the dilution liquid storage tank 33 to produce a diluted liquid. . The diluent is, for example, 200 ppm of chlorous acid water. In addition, the original solution is not easy to deteriorate and can be stored for about 1 year. In the present embodiment, by diluting and utilizing the stock solution, the frequency of exchanging the stock solution tank 32 or replenishing the stock solution to the stock solution storage tank can be reduced. For example, when the space sterilization system 300 is operated for 24 hours, the exchange of the original solution storage tank 32 or the replenishment of the original solution may be performed once every 1 to 2 months.

Three spraying devices 10 are arranged in the lower space 30b. Spraying pipes 61 are attached to the spraying ports 10x of the three spraying devices 10, and the spraying pipes 61 are connected to each other and extend toward the corresponding air conditioning equipment 50 (see FIG. 7 ). The mist M sprayed from the spray port 10x is sent to the corresponding air conditioning equipment 50 through the spray pipe 61 .

The dilution liquid in the dilution liquid storage tank 33 is supplied to the storage tank unit 15 (refer FIG. 3) of each spraying apparatus 10 via a supply pipe and a supply pump (not shown).

The control unit 20u controls the three spraying devices 10 and each of the above-mentioned pumps.

The maximum spraying capacity of the spraying unit 10u including three spraying devices 10 is about 3.6 L/h. In this embodiment, by setting up four spraying units 10u, it is possible to compare large spaces (large-scale offices, factories, music facilities, cinemas) , logistics facilities, etc.: for example, the space larger ^than the floor area of 100 m2) V is effective in sterilization.

In the present embodiment, the control device 20 controls the spray by adjusting the voltage of the atomizing unit 12 and the rotation speed of the blower 13 based on the volume of the space V and the diameter and length of the air supply duct 53, as in the first embodiment. The supply amount of the mist M in the space V from the device 10 .

Furthermore, in the present embodiment, the control device 20 controls each of the three spraying devices 10 included in the spraying unit 10u to intermittently spray the mist M, and at least one of the three spraying devices 10 maintains the spraying of the mist. The state of M. In this case, it is possible to suppress the problem that the particles of the mist M adhere to the inner wall of the air supply duct 53 and the mist M is not supplied to the space V, and by not setting the time during which the three spraying devices 10 do not spray the mist M, it is possible to The amount of particles in the space V is kept above a certain level, so that a high sterilization effect can be continuously obtained. [Example]

The inventors of the present invention conducted experiments on the space sterilization system of the present invention according to the following Examples 1 to 3.

<Example 1> In Example 1, an experiment was performed by installing one air conditioner and one spray device in a space with a floor area of about 300 m ² . As a spray device, Devirus AC (a device that can be applied to spaces with a floor area of 100 m ² or less) manufactured and sold by Space Sterilization Co., Ltd. was used. In addition, as the sterilizing liquid, chlorous acid water diluted to 200 ppm was used.

The space of Embodiment 1 is divided into a plurality of rooms V1 to V6, as in the second embodiment described above (refer to FIG. 5 ). The arrangement configuration of the air-conditioning equipment and the spray device in the space is also the same as that of the above-described second embodiment (see FIG. 5 ).

In each room, measure the number of particles with a particle counter, and find the particle size of 0.3-0.5 µm, 0.5-1.0 µm, 1.0-2.0 µm, and 2.0-5.0 µm. out diffusivity (see Table 1). Here, the diffusivity means the number of particles measured in the room and the particles measured in the room V3 where the length of the duct (the length of the air supply duct 53 from the suction port 53x to the air outlet 53y shown in FIG. 1 ) is 18 m ratio of numbers.

[Table 1]

It can be seen from Table 1 that the smaller the particle size, the greater the diffusivity (that is, in the rooms V1 and V2 with long pipes, the number of particles measured is close to the number of particles measured in room V3 with short pipes), especially the particle size is In the case of 0.3~0.5 µm, the number of particles measured in rooms V1, V2 and V3 is approximately the same, and the particles spread throughout the entire space regardless of the length of the pipe. That is, it can be seen that the smaller the particle size (especially the particle size of 0.3-0.5 µm), the less the fog will fall on the inner wall or floor of the air supply pipe before it spreads over the entire larger space, but rather reaches a distance.

Furthermore, by providing the communication pipe 62 (see FIG. 5 ) in the first embodiment, the pressure in the storage tank can be stabilized, and no problem occurs during the detection of the remaining amount, and the mist can be properly ejected.

<Example 2> In Example 2, an experiment was performed by installing 4 air conditioners in a hall having a space of 11,920 m ³ in volume, and installing 4 spray devices (16 in total) in each air conditioner. As each spray device, Devirus AC (a device that can be applied to a space with a floor area of 100 m ² or less) manufactured and sold by Space Sterilization Co., Ltd. was used. In addition, as the sterilizing liquid, chlorous acid water diluted to 200 ppm was used. The amount of outside air supplied to the space was 93,800 m ³ /h, and the number of air changes was 7.9 times/h.

The space of Example 2 consists of the northern part of the 1st floor guest seat, the central part of the 1st floor guest seat, the southern part of the 1st floor guest seat, the center of the stage, and the central part of the 2nd floor guest seat.

In Example 2, a total of 16 spraying apparatuses were driven intermittently, and mist was intermittently sprayed from each spraying apparatus. Specifically, after driving each spray device continuously for 30 minutes, the control of stopping for 30 minutes was repeatedly executed. In addition, the number of particles with a particle size of 0.3 µm and the number of particles with a particle size of 0.5 µm were measured for each of the northern part of the 1st floor guest seat, the central part of the 1st floor guest seat, the southern part of the 1st floor guest seat, the center of the stage, and the center part of the 2nd floor guest seat. (Refer to FIGS. 9( a ) to ( f )). In addition, in FIG.9(c), (d), the solid line and the broken line are the measurement results of the central part of the 1st floor guest seat, but the measurement time points are different.

From Figure 9(a)~(f), it can be seen that there is no difference in the number of particles caused by the location in the space between the particles with a particle size of 0.3 µm and a particle with a particle size of 0.5 µm. That is, it can be seen that both particles with a particle size of 0.3 µm and particles with a particle size of 0.5 µm can spread throughout a large entire space through the air conditioning equipment.

In addition, in Example 2, air sampling was performed three times in total at each of the first floor guest seats, the stage, and the second floor guest seats, one time before the spray of mist, and two times after the spray of mist, and the number of bacteria was measured (refer to the table). 2).

[Table 2]

It can be seen from Table 2 that a higher bacteria reduction rate was obtained in each place of the space, and the average bacteria reduction rate of the entire space was 85%. After a specific time from the spraying of the mist, a higher bacteria removal rate can be obtained in the entire space. Effect.

<Example 3> In Example 3, as shown in Table 3 below, experiments were conducted under different conditions for three laboratories (office building, concert hall, and banquet hall) having different volumes. As a spray device, Devirus AC (a device that can be applied to spaces with a floor area of 100 m ² or less) manufactured and sold by Space Sterilization Co., Ltd. was used. In addition, as the sterilizing liquid, chlorous acid water diluted to 200 ppm was used.

[table 3]

Judging from Table 3, if the number of particles with a particle size of 0.5 µm is more than 30,000/L, and the particle concentration per 1 m ³ is more than 0.58 ml, the bacterial reduction rate can be predicted to be more than 80%.

<Variation example> Preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various design changes can be made as long as they are described within the scope of the patent application.

Although the space to which the space sterilization system of the present invention is applied is divided into a plurality of rooms in the above-mentioned embodiment, it is not limited to this, and may be constituted by a single room that is not divided.

One or a plurality of air conditioners may be installed in the space to be sterilized. In addition, one or a plurality of spray devices may be attached to one air-conditioning apparatus.

The control device is not limited to controlling the spray device by intermittently spraying the mist, and the spray device may be controlled by continuously spraying the mist.

The air-conditioning sterilization system of the present invention can also be further provided with a sensor for detecting fog in the space, and the control device can feedback control the voltage of the atomizing unit, the rotation number of the blower, and the rotation of the blower fan based on the signal from the sensor. number, ventilation, etc. In addition, the space sterilization system of the present invention can further be provided with a sensor for detecting the fog deposition in the space, and the control device is based on the signal from the above-mentioned sensor to prevent the fog settling. Voltage, number of rotations of the blower, number of rotations of the blower fan, ventilation volume, etc.

In the above embodiment, the control device derives the power of the atomizing unit and the rotation number of the blower according to the input of the volume of the space, the diameter of the air supply pipe, and the length of the air supply pipe, but it is not limited to this. For example, the control device can also derive the amount of mist M that should be supplied to the space according to the input of the volume of the space, the diameter of the air supply pipe, and the length of the air supply pipe, and based on the amount of the derived mist M, the atomizing unit is derived power and the number of rotations of the blower. Also, for example, in the control device, the amount of the mist M to be supplied to the space obtained from the volume of the space, the diameter of the air supply pipe, and the length of the air supply pipe may be obtained from the outside, and based on the obtained mist The amount of M is derived from the power of the atomizing unit and the rotation number of the blower. Also, for example, the control device may obtain the power of the atomizing unit and the rotation number of the blower from the outside, which are obtained from the volume of the space, the diameter of the air supply duct, and the length of the air supply duct.

In the above embodiment, when the control device controls the amount of mist supplied by the spray device to the space in such a way that the mist diffuses in the air in the space, both the electric power of the atomizing unit and the rotation number of the blower are adjusted, but the atomizing unit may not be performed. power adjustment. Furthermore, in the above-mentioned embodiment, the control device adjusts the rotation number of the blower based on both the volume of the space and the diameter and length of the air supply duct, but it may be adjusted based on one of the volume of the space, the diameter and the length of the air supply duct. The number of rotations of the blower. Moreover, a control apparatus may adjust the rotation number of an air blower only based on the volume of a space.

The air-conditioning equipment equipped with the spray device can be either existing equipment or new equipment.

The installation structure of the spray device to the air-conditioning equipment can be any as long as the mist sprayed from the spray device is supplied to the space through the air supply duct, and is not limited to the structure of the above-described embodiment. For example, in the first embodiment (see FIG. 1 ), a spray pipe may be attached to the spray port 10x, the spray port 10x may be connected to the suction port 53x of the air supply duct 53 by the spray pipe, and the mist sprayed by the spray device 10 may be M is delivered to the air supply line 53 via a spray pipe. In addition, the spray device may be attached to the branch of the air supply duct or the like. However, as shown in the above-mentioned first embodiment (refer to FIG. 1 ), it is preferable to attach the spray device to the air-conditioning apparatus 50 so as to spray the mist M near the blower fan 58 . In this case, the mist M is easily sucked into the air supply duct 53 smoothly under the negative pressure environment, and the mist M is diffused into the space V through the air supply duct 53 .

The air conditioning equipment can also discharge part of the air in the space to the outside through the exhaust duct. Alternatively, the air conditioning equipment may be configured to circulate the air in the space through a return air duct and an air supply duct without having a duct (an external air duct and an exhaust duct) that communicates the air conditioning equipment with the outside.

The spray device is not limited to the configuration of the above-mentioned embodiment as long as it can spray the sterilizing liquid as a mist having a particle size that can be dispersed in the air in the space as liquid particles (see FIGS. 2 and 3 ). For example, in the above-described embodiment, the spray device atomized the sterilization liquid by ultrasonic waves, but the sterilization liquid may be atomized by methods other than ultrasonic waves.

"The particle size that can disperse the sterilizing liquid in the air in the space in the state of liquid particles" is not limited to less than 3 µm. For example, even if the particle size is 3 µm or more, by controlling the voltage of the atomizing unit, the number of rotations of the blower, the number of rotations of the blower fan, and the amount of ventilation, the sterilizing liquid can be dispersed in the state of liquid particles. in the air in the space.

The sterilizing liquid used in the present invention is exemplified by chlorous acid water, hypochlorous acid water, sodium hypochlorite, alcohol, etc. in the above-mentioned embodiment, but it is not limited to this, and may have a sterilizing effect (that is, it can be suspended in the space V the role of bacteria or virus sterilization) any liquid.

10: Spray device 10c: Frame 10u: spray unit 10x: spray port 10y: blocking the door 11: Storage tank 11f: Floating tank 12: Atomization unit 13: Blower 14: Baffle 15: Tank unit 16: Supply pipe 17: Supply pump 18: Send out the tube 19: Power unit 20: Control device 20u: control unit 21: CPU (Central Processing Unit) 22: ROM (read only memory) 23: RAM (Random Access Memory) 30: Frame 30a: the upper space of the frame body 30 30b: the lower space of the frame body 30 31: Spacer 32: Raw solution storage tank 33: Diluent storage tank 34: Feed Pump 50: Air conditioning equipment 51: External air duct 52: return gas pipeline 53: Air supply pipeline 53x: suction port 53y: Blow Out 55: Electric dust collector 56: Hot and cold water coils 57: Humidifier 58: Air supply fan 60: Room 61: Spray Tube 62: Connecting pipe 91: Emergency stop switch 92: Monitor 93: Speakers 100: Space sterilization system 200: Space Sterilization System 300: Space sterilization system M: fog OA: Outside Air RA: air SA: Air in each room V1~V6 V: space V1: Room V2: Room V3: Room V4: Room V5: Room V6: Room

FIG. 1 is a schematic configuration diagram showing a space sterilization system according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a spray device included in the space sterilization system of FIG. 1 . Fig. 3 is a side view of the state in which the side cover of the frame in the spray device of Fig. 2 is removed. FIG. 4 is a block diagram showing the electrical configuration of the space sterilization system of FIG. 1 . Fig. 5 is a schematic configuration diagram showing a space sterilization system according to a second embodiment of the present invention. 6(a) and (b) are side views showing the storage tank of the spray device of FIG. 5 and the floating tank provided outside the storage tank. Fig. 7 is a schematic configuration diagram showing a space sterilization system according to a third embodiment of the present invention. FIG. 8 is a schematic configuration diagram showing a spray unit included in the space sterilization system of FIG. 7 . FIGS. 9( a ) to ( f ) are graphs showing the measurement results of the particle number in Example 2. FIG.

10: Spray device

10x: spray port

20: Control device

50: Air conditioning equipment

51: External air duct

52: return gas pipeline

53: Air supply pipeline

53x: suction port

53y: Blow Out

55: Electric dust collector

56: Hot and cold water coils

57: Humidifier

58: Air supply fan

60: Room

100: Space sterilization system

M: fog

OA: Outside Air

RA: air

SA: Air in each room V1~V6

V: space

V1: Room

V2: Room

V3: Room

V4: Room

V5: Room

V6: Room

Claims (9)

A space sterilization system, characterized in that it has: A spray device, which is installed in an air conditioner that circulates the air in the space by recovering the air supplied to the space from the air supply duct through the return air duct, and atomizes the sterilizing liquid into liquid particles The mist of particle size dispersed in the air in the above-mentioned space is sprayed out, and the above-mentioned mist is supplied to the above-mentioned space through the above-mentioned air supply pipe; and A control device for controlling the amount of the mist supplied by the spray device to the space so that the mist diffuses in the air in the space. The space sterilization system of claim 1, wherein the above particle size is less than 3 µm. The space sterilization system of claim 2, wherein the above particle size is 0.3 µm~0.5 µm. The space sterilization system of any one of claims 1 to 3, wherein The above-mentioned spray device is arranged outside the above-mentioned air-conditioning equipment, and further includes: A spray pipe that connects the spray device to the air conditioning equipment in such a way that the mist is supplied to the air supply duct; and A communication pipe, which communicates the above-mentioned spray device with the space in the above-mentioned air-conditioning apparatus. The space sterilization system according to any one of claims 1 to 4, wherein the control device controls the spray device to intermittently spray the mist. As claimed in claim 5, the space sterilization system is provided with a plurality of the above-mentioned spraying devices; and When the control device controls each of the plurality of spray devices to intermittently spray the mist, at least one of the plurality of spray devices maintains the state of spraying the mist. The space sterilization system of any one of claims 1 to 6, wherein The above-mentioned spray device includes a blower for supplying the above-mentioned mist to the above-mentioned air supply pipe; The said control apparatus controls the said supply amount by adjusting the rotation number of the said blower based on the volume of the said space. The space sterilization system according to claim 7, wherein the control device adjusts the number of rotations of the blower based on at least one of the volume of the space and the diameter and length of the air supply duct. The space sterilization system of claim 7, wherein the control device adjusts the rotation number of the blower based on the volume of the space and the diameter and length of the air supply duct.

Images