JP2020110226A - Hypochlorous acid gas emission system and hypochlorous acid gas emission method - Google Patents

Abstract

To equalize a concentration of a hypochlorous acid gas inside a space in a short period of time.SOLUTION: A hypochlorous acid gas emission system 1 includes: an emission port 10 configured to emit a gas including a hypochlorous acid gas; and a control part 30 configured to control an emission direction of the gas from the emission port 10. The control part 30 executes: a first control of changing the emission direction by an elapse of time, for a predetermined period of time from an emission start of the gas; and a second control of fixing the emission direction after the elapse of the predetermined period of time.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hypochlorous acid gas releasing system and a hypochlorous acid gas releasing method.

For example, Patent Document 1 discloses a gas generator that generates a gas containing hypochlorous acid gas.

JP, 2014-190660, A

When a conventional gas generator releases a gas containing hypochlorous acid gas into the space, it takes a long time for the concentration of the hypochlorous acid gas to become uniform in the space.

Therefore, an object of the present invention is to provide a hypochlorous acid gas releasing system and a hypochlorous acid gas releasing method, which can make the concentration of hypochlorous acid gas in a space uniform in a short period of time. ..

In order to achieve the above object, a hypochlorous acid gas release system according to an aspect of the present invention controls a release port for releasing a gas containing hypochlorous acid gas and a release direction of the gas from the release port. The control unit executes a first control for changing the discharge direction with time for a predetermined period from the start of discharging the gas, and a second control for fixing the discharge direction for the predetermined period. Execute after a lapse of time.

Further, the hypochlorous acid gas releasing method according to an aspect of the present invention, the first control for changing the emission direction of the gas from an emission port for emitting the gas containing the hypochlorous acid gas with time, The second control is executed for a predetermined period from the start of the discharge and the second control for fixing the discharge direction is executed after the lapse of the predetermined period.

Further, one embodiment of the present invention can be realized as a program for causing a computer to execute the above-mentioned hypochlorous acid gas releasing method. Alternatively, it can be realized as a computer-readable recording medium that stores the program.

According to the present invention, the concentration of hypochlorous acid gas in the space can be made uniform in a short period of time.

FIG. 1 is a block diagram showing the configuration of the hypochlorous acid gas releasing system according to the first embodiment. FIG. 2 is a diagram schematically showing a discharge port of the hypochlorous acid gas discharge system according to the first embodiment. FIG. 3 is a diagram showing an example in which the emission direction of the hypochlorous acid gas emission system according to the first embodiment is continuously changed. FIG. 4 is a flowchart showing the operation of the hypochlorous acid gas release system according to the first embodiment. FIG. 5A is a diagram showing a simulation result of the concentration of hypochlorous acid gas at each position in the target space immediately after the start of stable operation control. FIG. 5B is a diagram showing a simulation result of the concentration of hypochlorous acid gas at each position in the target space immediately after the diffusion operation control is started. FIG. 6A is a diagram showing a simulation result of the concentration of hypochlorous acid gas at each position in the target space after a lapse of a certain period from the start of stable operation control. FIG. 6B is a diagram showing a simulation result of the concentration of hypochlorous acid gas at each position in the target space after a lapse of a certain period from the start of the diffusion operation control. FIG. 7 is a diagram showing a simulation result showing the degree of uniformity of the concentration of the hypochlorous acid gas in the space when the stable operation control and the diffusion operation control are executed. FIG. 8 is a diagram showing an example of gas emission directions by the hypochlorous acid gas emission system according to the modification of the first embodiment. FIG. 9 is a block diagram showing the configuration of the hypochlorous acid gas releasing system according to the second embodiment. FIG. 10 is a flowchart showing the operation of the hypochlorous acid gas releasing system according to the second embodiment. FIG. 11 is a block diagram showing the configuration of the hypochlorous acid gas releasing system according to the third embodiment. FIG. 12 is a diagram showing an example of the detection position of the hypochlorous acid gas sensor in the hypochlorous acid gas release system according to the third embodiment. FIG. 13 is a flowchart showing the operation of the hypochlorous acid gas releasing system according to the third embodiment. FIG. 14 is a block diagram showing the configuration of the hypochlorous acid gas releasing system according to the fourth embodiment. FIG. 15 is a flowchart showing the operation of the hypochlorous acid gas releasing system according to the fourth embodiment.

Hereinafter, a hypochlorous acid gas releasing system, a hypochlorous acid gas releasing method, and the like according to an embodiment of the present invention will be described in detail with reference to the drawings. It should be noted that each of the embodiments described below shows one specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangements and connection forms of components, steps, order of steps, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. Therefore, among the constituents in the following embodiments, constituents not described in the independent claims are described as arbitrary constituents.

In addition, each drawing is a schematic view, and is not necessarily strictly illustrated. Therefore, for example, the scales and the like in the drawings do not necessarily match. Further, in each of the drawings, the substantially same components are designated by the same reference numerals, and duplicate description will be omitted or simplified.

Further, in the present specification, a term indicating a relationship between elements such as parallel or vertical, a term indicating a shape of an element, and a numerical range are not expressions expressing only a strict meaning but are substantially equivalent. It is an expression that means that it also includes a range of, for example, a difference of about several percent.

In addition, in the present specification, “uniform” means not only a completely uniform state, that is, the concentrations at all points in the space are completely equal, but also the concentrations at any points in the space. It means that the difference between the average value and the average value is sufficiently small. That is, the "uniform" state is a state in which all the concentrations in the space are substantially equal without locally forming low or high positions in the space. For example, in the “uniform” state, the concentration at any point in space is within ±10% of the average value.

(Embodiment 1)
[Constitution]
First, the configuration of the hypochlorous acid gas releasing system according to the first embodiment will be described with reference to FIGS. 1 and 2.

FIG. 1 is a block diagram showing a configuration of a hypochlorous acid gas releasing system 1 according to the present embodiment. FIG. 2 is a diagram schematically showing the emission port 10 of the hypochlorous acid gas emission system 1 according to the present embodiment.

The hypochlorous acid gas release system 1 according to the present embodiment releases a gas containing hypochlorous acid gas into a space (hereinafter, sometimes referred to as a target space). The target space is specifically a closed space such as an indoor space of a building. The target space is, for example, a living space of a general home or an indoor space of a hospital or a nursing facility. Note that the target space does not have to be a completely closed space, and may be connected to the outdoors. Further, the target space may be not only the space in the building but also the indoor space of a moving body such as a train or a car.

Hypochlorous acid gas has sterilizing and deodorizing effects. Specifically, the hypochlorous acid gas has an oxidative effect, and disinfects and deodorizes by decomposing floating bacteria in the target space, adherent bacteria adhering to an object, or odorous substances by oxidation. Therefore, the disinfecting and deodorizing effects are determined by the CT value which is the product of the concentration of hypochlorous acid gas and the contact time with the gas.

As shown in FIG. 1, the hypochlorous acid gas emission system 1 includes an emission port 10 and a control unit 30. In the present embodiment, the hypochlorous acid gas release system 1 further includes the generation unit 20.

The discharge port 10 discharges gas containing hypochlorous acid gas. In the present embodiment, the discharge port 10 discharges the gas containing the hypochlorous acid gas generated by the generation unit 20. The discharge port 10 is, for example, an opening provided in a housing that houses the generation unit 20. Alternatively, the discharge port 10 may be an opening provided on a wall surface forming the target space.

Here, FIG. 2 shows a schematic plan view of the discharge port 10 when viewed from the front. As shown in FIG. 2, the discharge port 10 is provided with a plurality of movable louvers 11 and 12. In the present embodiment, the control unit 30 changes the direction of the plurality of louvers 11 and 12 to change the direction in which the gas is discharged from the discharge port 10.

The discharge port 10 is provided, for example, in a state of being inclined at a predetermined angle with respect to the horizontal plane. The predetermined angle is, for example, 30°, but is not limited to this. Further, the discharge port 10 may be parallel to the horizontal plane or may be vertical.

Each of the plurality of louvers 11 is a long plate member that extends in the horizontal direction. The plurality of louvers 11 can be rotated, for example, about a horizontal direction as an axis, and the angle of the discharge direction in the vertical direction can be changed.

Each of the plurality of louvers 12 is a long plate member that extends in a direction orthogonal to the direction in which the louvers 11 extend when the outlet 10 is viewed from the front. The plurality of louvers 12 can be rotated, for example, about the direction in which the louvers 12 extend, and the angle of the discharge direction in the left-right direction can be changed.

Each of the plurality of louvers 11 and the plurality of louvers 12 has a movable range within a range of ±15° to the left and right around the normal line direction of the discharge port 10. The movable range of the louver 11 and the louver 12 is not limited to this, and may be within a range of ±90° or less, for example ±45°.

The generation unit 20 generates hypochlorous acid gas. Specifically, the generation unit 20 generates hypochlorous acid gas by electrolyzing saline. For example, the production|generation part 20 produces|generates salt solution by mixing tap water and a salt tablet, and produces|generates hypochlorous acid gas by electrolyzing the produced salt solution. The generation unit 20 is realized by a container that stores saline, an electrode for electrolysis, a power supply circuit, and the like.

The generation unit 20 is provided, for example, inside the housing, and the outlet 10 is provided in the housing. When the generation unit 20 and the discharge port 10 are provided separately, the generation unit 20 and the discharge port 10 may be connected by a duct or the like. For example, the generation unit 20 may be provided outside the target space.

The control unit 30 controls the emission direction of the gas from the emission port 10. The control unit 30 is, for example, a microcomputer or the like. Specifically, the control unit 30 is realized by a non-volatile memory in which a program is stored, a volatile memory that is a temporary storage area for executing the program, an input/output port, a processor that executes the program, and the like. To be done.

The control unit 30 executes diffusion operation control and stable operation control. The diffusion operation control is an example of first control for changing the gas emission direction with time. The stable operation control is an example of second control for fixing the gas discharge direction.

In the present embodiment, when executing the diffusion operation control, the control unit 30 continuously changes the emission direction within a predetermined range, as shown in FIG. FIG. 3 is a diagram showing an example in which the emission direction of the hypochlorous acid gas emission system 1 according to the present embodiment is continuously changed. In FIG. 3, the emission direction of the gas is represented by an arrow passing through the emission port 10.

For example, FIG. 3 shows an example in which the louver 12 for adjusting the angle in the horizontal direction is continuously changed while the louver 11 for adjusting the angle in the vertical direction is fixed. For example, as shown in FIG. 3, the plurality of louvers 12 change from one end (a) of the movable range through the center (b) to the other end (c) over a predetermined period, and the other end ( It changes from c) through the center (b) to one end (a) over a predetermined period. The change from the one end (a) to the other end (c) and the change from the other end (c) to the one end (a) are alternately repeated.

Thereby, the emission direction of the gas containing the hypochlorous acid gas continuously changes. Note that continuous means that the discharge direction changes smoothly. For example, the angle of the emission direction that changes per second is 5° or less.

The control unit 30 has a time measuring function. The control unit 30 switches between the diffusion operation control and the stable operation control based on the elapsed time from the start of operation of the hypochlorous acid gas release system 1. Specifically, the control unit 30 executes the diffusion operation control for a predetermined period from the start of gas release, and executes the stable operation control after the lapse of the predetermined period.

The predetermined period is a period determined based on the number of ventilations of the target space from which the gas is released. For example, the predetermined period is a period equal to or less than the reciprocal of the ventilation rate per hour. Specifically, when the ventilation frequency is 6 times per hour, the predetermined period is ⅙ hour, that is, a period of 10 minutes or less. This is because it is considered that the hypochlorous acid gas has spread to almost the entire target space when ventilation of the target space is completed once.

In addition, the minimum value of the predetermined period is determined based on the discharge rate and the discharge range of the gas from the discharge port 10. For example, the minimum value of the predetermined period is defined as a value obtained by accumulating the product of the gas discharge velocity (that is, the flow velocity) from the discharge port 10 and the depth of the target space in the discharge direction for each discharge direction. When the emission direction changes continuously, the change range of the emission direction can be considered by virtually dividing it into a predetermined number of emission directions.

Specifically, when the gas is discharged at a flow rate of 0.5 m/sec and the distance from the discharge port 10 to the innermost part of the target space in each discharging direction is 10 m, the gas reaches the innermost part. It takes 20 seconds (=10 m÷0.5/second) to complete. When the variation range of the emission direction is divided into 10 directions and considered, it takes 200 seconds (=10 directions×20 seconds) to cover almost the entire space. Therefore, the predetermined period is, for example, 200 seconds or more.

The control unit 30 includes, for example, a memory that stores a predetermined period. Alternatively, the control unit 30 may receive inputs such as the ventilation frequency, the size of the target space, and the installation position of the discharge port 10 and may determine the predetermined period by calculation.

[motion]
Next, the operation of the hypochlorous acid gas releasing system 1 according to the present embodiment, that is, the hypochlorous acid gas releasing method will be described.

FIG. 4 is a flowchart showing the operation of the hypochlorous acid gas releasing system 1 according to this embodiment. As shown in FIG. 4, the control unit 30 first executes diffusion operation control (S10). The control unit 30 maintains the diffusion operation control until the elapsed time from the start of the gas release reaches the predetermined period (No in S12). As a result, in the predetermined period, the direction in which the gas is discharged from the discharge port 10 changes continuously, so that the hypochlorous acid gas easily spreads in the target space.

When the predetermined period has elapsed from the start of gas release (Yes in S12), the control unit 30 stops the diffusion operation control and executes the stable operation control (S14). Specifically, the control unit 30 fixes the discharge direction from the discharge port 10 to one direction. The fixed direction is a preset direction. The preset direction may be, for example, a direction in which the gas is discharged toward a position where the concentration of hypochlorous acid gas is likely to decrease in the target space. Alternatively, the fixed direction may be the release direction at the time when a predetermined period has elapsed.

After that, the control unit 30 maintains the stable operation control until the operation of the hypochlorous acid gas release system 1 is completed (No in S16).

[simulation result]
Below, the result of simulating the time change of the concentration of the hypochlorous acid gas in the target space when the stable operation control and the diffusion operation control are executed independently will be described.

The simulation conditions are as follows. In the stable operation control, the discharge direction is fixed at 30° upward from the horizontal plane, and in the left-right direction, it is fixed to the front direction of the discharge port 10. In the diffusion operation control, the discharge direction is fixed at 30° upward from the horizontal plane, and is continuously changed in the range of ±15° in the left-right direction. The time required from one end to the other end in the change range of the emission direction is 27 seconds.

5A and 5B are diagrams showing simulation results of the concentration of hypochlorous acid gas at each position in the target space immediately after the start of stable operation control and diffusion operation control, respectively. In each of FIGS. 5A and 5B, the horizontal axis represents the position in the target space, and the vertical axis represents the concentration of hypochlorous acid gas. 5A and 5B show the concentration of hypochlorous acid gas at each position 25 seconds after the start of gas release.

As shown in FIGS. 5A and 5B, immediately after the start of gas release, the concentration of hypochlorous acid gas varies depending on the position of the target space. As indicated by the white double-headed arrow in each figure, immediately after the start, there are a plurality of positions where hypochlorous acid gas is not detected in both stable operation control and diffusion operation control.

At this time, in the diffusion operation control, there are fewer positions where the hypochlorous acid gas is not detected than in the stable operation control. That is, in the diffusion operation control, the hypochlorous acid gas is diffused in the target space in a shorter period of time.

6A and 6B are diagrams showing simulation results of the concentration of hypochlorous acid gas at each position in the target space after a certain period of time has elapsed since the start of stable operation control and diffusion operation control. 6A and 6B show the concentration of hypochlorous acid gas at each position after 300 seconds from the start of gas release. The vertical and horizontal axes in each of FIGS. 6A and 6B are the same as those in FIGS. 5A and 5B.

As shown in FIG. 6A, after 300 seconds from the start of gas release, in the case of stable operation control, the concentration of hypochlorous acid gas is uniform in the target space. On the other hand, as shown in FIG. 6B, in the case of the diffusion operation control, it can be seen that waves are generated in the concentration distribution of the hypochlorous acid gas and the uniformity is lowered. That is, if the diffusion operation control is continued, the concentration of hypochlorous acid gas becomes non-uniform. This is because the air flow in the space is disturbed by the diffusion operation.

FIG. 7: is a figure which shows the simulation result showing the uniformity degree in the target space of the density|concentration of hypochlorous acid gas when each of stable operation control and diffusion operation control is performed. In FIG. 7, the horizontal axis represents the elapsed time from the start of gas release, and the vertical axis represents the degree of uniformity of the hypochlorous acid gas concentration. The higher the vertical axis is, the higher the uniformity is.

As shown in FIG. 7, the degree of uniformity of the diffusion operation control is higher than that of the stable operation control in a short period of time. On the other hand, during the period from 3 minutes to 10 minutes after the start, the stable operation control has a higher degree of uniformity than the diffusion operation control. In a steady state after a sufficient time has passed, the diffusion operation control and the stable operation control have substantially the same degree of uniformity.

In the present embodiment, the diffusion operation control is executed for a predetermined period from the start of gas release. As a result, the concentration of the hypochlorous acid gas in the target space can be brought into a highly uniform state in a short period of time. After the elapse of a predetermined period, the diffusion operation control is switched to the stable operation control, and the stable operation control is executed. As a result, it is possible to maintain the state of higher uniformity.

[Effects]
As described above, the hypochlorous acid gas release system 1 according to the present embodiment controls the release port 10 that releases the gas containing the hypochlorous acid gas, and the control direction that releases the gas from the release port 10. And a unit 30. The control unit 30 executes the diffusion operation control for changing the release direction with time for a predetermined period from the start of the gas release, and the stable operation control for fixing the release direction after the predetermined period.

As a result, by performing the stable operation control after executing the diffusion operation control, the concentration of the hypochlorous acid gas in the target space can be reduced in a shorter period than in the case where one of the diffusion operation control and the stable operation control is always executed. It can be made uniform. Therefore, a state having a high sterilization effect can be formed in the target space in a short period of time.

Further, since the concentration of hypochlorous acid gas in the target space can be made uniform in a short period of time, the amount of hypochlorous acid gas used can be reduced. Thereby, when hypochlorous acid gas is generated by electrolysis, power consumption can be reduced. Further, the number of times of replenishing water and salt tablets, which are raw materials of hypochlorous acid gas, can be reduced, so that the frequency of maintenance can be reduced.

Further, for example, the predetermined period is a period determined based on the number of ventilations of the target space from which the gas is released.

As a result, the concentration of hypochlorous acid gas can be made uniform in a short period of time regardless of the size of the target space. The ventilation frequency is set according to the type of space at the stage of space design, for example. Specifically, when the target space is a room such as an ordinary home, the ventilation frequency is 0.5 times per hour. When the target space is a room such as a hospital or nursing facility, the ventilation frequency is within the range of 6 to 12 times per hour. Therefore, it is not necessary to actually measure the size of the target space and the ventilation frequency, and the operating conditions of the hypochlorous acid gas release system 1 can be easily set.

Further, for example, the control unit 30 continuously changes the release direction within a predetermined range when executing the diffusion operation control.

As a result, the release direction can be changed in an analog manner, so that the uniformity of the concentration of hypochlorous acid gas can be increased.

In addition, for example, the hypochlorous acid gas releasing method according to the present embodiment performs diffusion operation control for changing the emission direction of the gas from the emission port 10 that releases the gas containing the hypochlorous acid gas over time. The stable operation control is performed for a predetermined period from the start of the discharge, and the stable discharge direction is fixed after the predetermined period has elapsed. Further, the program according to the present embodiment is a program for causing a computer to execute the above-mentioned hypochlorous acid gas releasing method.

Thereby, the concentration of hypochlorous acid gas in the target space can be made uniform in a short period of time.

[Modification]
Here, a modified example of the hypochlorous acid gas releasing system 1 according to the present embodiment will be described.

In this modification, a plurality of emission directions are defined as the emission directions from the emission port 10. The control unit 30 selects one from a plurality of predetermined discharge directions and causes the gas to be discharged from the discharge port 10 in the selected discharge direction. For example, the control unit 30 discretely changes the emission direction within a predetermined range when executing the diffusion operation control. Specifically, when executing the diffusion operation control, the control unit 30 sequentially selects one from a plurality of emission directions and sequentially changes the emission direction in the selected order. That is, the control unit 30 causes a plurality of directions to transition with the passage of time.

FIG. 8: is a figure which shows the example of the gas discharge direction by the hypochlorous acid gas discharge system 1 which concerns on this modification. FIG. 8 schematically shows that the target space when viewed from the outlet 10 is divided into 3×3 9 regions. The nine areas are defined by a combination of three "upper", "center" and "lower" in the vertical direction and three "left", "center" and "right" in the left-right direction. It should be noted that the three “upper” discharge directions A to C in the vertical direction are directions in which gas can be discharged toward positions far from the discharge port 10. The “lower” three emission directions G to I are directions in which the gas can be emitted to a position close to the emission port 10.

In this modification, the control unit 30 selects one of the nine emission directions A to I and causes the gas to be emitted in the selected emission direction. When executing the diffusion operation control, the control unit 30 selects, for example, the discharge directions A to I one by one in this order. For example, the control unit 30 fixes the emission direction to the selected direction for a predetermined period such as 1 second to several seconds per one direction.

The order of selecting the emission directions is not particularly limited. For example, the control unit 30 may select the discharge directions I to A in this order. Alternatively, the control unit 30 may select in the order of “left” three columns, “center” three columns, “right” three columns, or vice versa. Further, the control unit 30 may thin out and select one or more emission directions from among the nine emission directions. For example, the control unit 30 may select only the emission directions A, C, E, G, and I in this order.

At this time, the control unit 30 may adjust the air volume of the gas discharged from the discharge port 10 according to the selected discharge direction. For example, as shown in FIG. 8, the air volume or the wind speed is changed in three stages of “high”, “medium” and “low” according to “upper”, “center” and “lower”. Good. Thereby, for example, when the three “upward” emission directions are selected and the gas is emitted far, a sufficient amount of hypochlorous acid gas can reach the deepest part of the target space. ..

As described above, in the hypochlorous acid gas release system according to the present modification, the control unit 30 discretely changes the release direction within a predetermined range when executing the diffusion operation control.

As a result, the emission direction is changed digitally, so that the configuration and control for changing the emission direction can be simplified.

(Embodiment 2)
Next, the second embodiment will be described.

[Constitution]
FIG. 9 is a block diagram showing the configuration of the hypochlorous acid gas releasing system 2 according to the present embodiment. As shown in FIG. 9, the hypochlorous acid gas release system 2 is different from the hypochlorous acid gas release system 1 according to the first embodiment in that a disturbance detection sensor 40 is newly provided, and the control unit 30. The difference is that a control unit 31 is provided instead of. In the following, differences from the first embodiment will be mainly described, and description of common points will be omitted or simplified.

The disturbance detection sensor 40 is an example of a first sensor that detects a factor that changes the concentration of hypochlorous acid gas in the target space from which gas is released. The factor here is a factor that changes the concentration of the hypochlorous acid gas even when the amount discharged from the discharge port 10 is constant, and corresponds to so-called disturbance. Specifically, the disturbance detection sensor 40 includes at least one of a human sensor, an opening/closing sensor, an odor sensor, an ultraviolet photometer, and the like.

The motion sensor detects a person. Specifically, the motion sensor detects the presence/absence of a person in the target space, the movement of the person, and the movement of the person in/out of the target space. An airflow is generated in the target space due to the movement of a person in and out of the target space and the movement of the person in the target space. This air flow may change the concentration distribution of hypochlorous acid gas. That is, a person is one of the disturbances that changes the concentration of hypochlorous acid gas. The human sensor is, for example, an infrared sensor, a visible light sensor, an ultrasonic sensor, or the like.

The opening/closing sensor detects opening/closing of an openable/closable member such as a door or a window among the members separating the target space and the external space. When the door or the window is opened or closed, there is a possibility that an air flow from the target space to the external space or from the external space to the target space may occur, and the concentration distribution of hypochlorous acid gas may change. In other words, opening and closing the door or window is one of the disturbances that changes the concentration of hypochlorous acid gas. The open/close sensor is, for example, a sensor that detects a magnetic field change.

The odor sensor detects odorous substances. Odorants are substances that give off an odor, such as ammonia or methyl mercaptan. Odorous substances are decomposed by reacting with hypochlorous acid gas. That is, when the odorous substance is detected, the hypochlorous acid gas is used for decomposing the odorous substance, so that the concentration of the hypochlorous acid gas is reduced. As described above, the odorous substance is one of the disturbances that changes the concentration of hypochlorous acid gas. The odor sensor is, for example, a semiconductor type sensor, a catalytic combustion type sensor, an electrochemical type sensor, or the like.

The ultraviolet photometer detects ultraviolet light. Since the hypochlorous acid gas is decomposed when it is irradiated with ultraviolet rays, the concentration of the hypochlorous acid gas is lowered. Thus, ultraviolet rays are one of the disturbances that change the concentration of hypochlorous acid gas. The ultraviolet photometer is, for example, a light receiving sensor such as a photodiode.

In the control unit 31 according to the present embodiment, in addition to the operation of the control unit 30, there is a factor that changes the concentration of hypochlorous acid gas by the disturbance detection sensor 40 during a period during which stable operation control is executed. When it is detected, the stable operation control is stopped and the diffusion operation control is executed for a predetermined period. Specifically, the control unit 31 acquires the detection result of the factor from the disturbance detection sensor 40, and determines whether or not to execute the diffusion operation control based on the acquired detection result. When it is determined that the diffusion operation control is to be executed, the control unit 31 executes the diffusion operation control for a predetermined period, and again executes the stable operation control after the elapse of the predetermined period.

For example, the control unit 31 executes the diffusion operation control when the presence/absence of a person in the target space is detected by the human sensor. Further, the control unit 31 executes the diffusion operation control when the opening/closing sensor detects the opening/closing of the door or the window in the target space. Alternatively, the control unit 31 compares the odor index detected by the odor sensor with a predetermined reference value, and executes the diffusion operation control when the detected odor index exceeds the reference value. The control unit 31 compares the amount of ultraviolet light detected by the ultraviolet photometer with a predetermined reference value, and executes the diffusion operation control when the detected amount of ultraviolet light exceeds the reference value.

[motion]
Next, the operation of the hypochlorous acid gas releasing system 2 according to the present embodiment, that is, the hypochlorous acid gas releasing method will be described.

FIG. 10 is a flowchart showing the operation of the hypochlorous acid gas releasing system 2 according to this embodiment. As shown in FIG. 10, the processes (S10 to S16) from the execution of the diffusion operation control to the maintenance of the stable operation control are the same as those in the first embodiment.

In the present embodiment, when the disturbance is detected by the disturbance detection sensor 40 (Yes in S18) during the period in which the stable operation control is being executed (No in S16), the control unit 31 returns to step S10 and again. Execute diffusion operation control.

When the disturbance is not detected by the disturbance detection sensor 40 (No in S18), the control unit 31 returns to step S14 and maintains the stable operation control.

[Effects]
As described above, the hypochlorous acid gas release system 2 according to the present embodiment further includes the disturbance detection sensor 40 that detects the factor that changes the concentration of the hypochlorous acid gas in the space where the gas is released. Prepare When the disturbance detection sensor 40 detects a factor within the period during which the stable operation control is executed, the control unit 31 further stops the stable operation control and executes the diffusion operation control for the predetermined period.

Accordingly, the diffusion operation control can be executed when the uniformity of the concentration of hypochlorous acid gas in the target space may be impaired due to factors such as the entry and exit of people or the opening and closing of windows. Therefore, even if the concentration of hypochlorous acid gas actually changes, the concentration of hypochlorous acid gas can be made uniform in a short period of time, so that the concentration of hypochlorous acid gas in the target space can be made uniform. It is possible to maintain a high quality for a long period of time.

(Embodiment 3)
Subsequently, a third embodiment will be described.

[Constitution]
FIG. 11 is a block diagram showing the configuration of the hypochlorous acid gas releasing system 3 according to the present embodiment. As shown in FIG. 11, the hypochlorous acid gas release system 3 is newly provided with a plurality of hypochlorous acid gas sensors 50 as compared with the hypochlorous acid gas release system 1 according to the first embodiment. The difference is that a control unit 32 is provided instead of the control unit 30. In the following, differences from the first embodiment will be mainly described, and description of common points will be omitted or simplified.

The hypochlorous acid gas sensor 50 is an example of a second sensor that detects the concentration of hypochlorous acid gas in the target space from which gas is released. The hypochlorous acid gas sensor 50 is, for example, an electrochemical sensor. The hypochlorous acid gas sensor 50 may directly detect hypochlorous acid, and indirectly detects hypochlorous acid by detecting chlorine generated by decomposition of hypochlorous acid. It may be detected.

In the present embodiment, the hypochlorous acid gas sensor 50 detects the concentration of hypochlorous acid gas at a predetermined position in the target space. For example, as shown in FIG. 12, the plurality of hypochlorous acid gas sensors 50 detect the concentrations of hypochlorous acid gas at different positions in the space 90.

FIG. 12 is a diagram showing an example of the detection position of the hypochlorous acid gas sensor in the hypochlorous acid gas release system 3 according to the present embodiment. In FIG. 12, four hypochlorous acid gas sensors 50a to 50d are shown. Each of the four hypochlorous acid gas sensors 50a to 50d is the hypochlorous acid gas sensor 50 shown in FIG. Hereinafter, the four hypochlorous acid gas sensors 50a to 50d will be described as the hypochlorous acid gas sensor 50 unless it is necessary to distinguish them.

FIG. 12 schematically shows a space 90, which is an example of a target space from which gas is released, and a concentration distribution of hypochlorous acid gas in the space 90. A door 91, an air supply port 92, and an exhaust port 93 are provided on the wall that separates the space 90 from the external space. In the concentration distribution of hypochlorous acid gas, the higher the density of dots, the higher the concentration of hypochlorous acid gas.

Airflow is likely to occur around the door 91 and in the path from the air supply port 92 to the exhaust port 93, and fluctuations in the concentration of hypochlorous acid gas are likely to increase. For example, when the door 91 is opened/closed, or ventilation is performed through the air supply port 92 and the air exhaust port 93, as shown in FIG. 12, the air is exhausted from around the door 91 and from the air supply port 92. The concentration of hypochlorous acid gas in the route to the mouth 93 tends to be low. The position where the concentration of hypochlorous acid gas is likely to decrease can be estimated in advance, for example, at the design stage of the target space.

In the present embodiment, the positions detected by the plurality of hypochlorous acid gas sensors 50 are positions where the concentration of hypochlorous acid gas is likely to decrease. For example, as shown in FIG. 12, the hypochlorous acid gas sensor 50a is arranged near the door 91 and detects the concentration of the hypochlorous acid gas at the arranged position. The hypochlorous acid gas sensors 50b to 50d are respectively arranged on the path from the air supply port 92 to the exhaust port 93, and detect the concentration of hypochlorous acid gas at the arranged position.

In the control unit 32 according to the present embodiment, in addition to the operation of the control unit 30, the hypochlorous acid gas sensor 50 changes the concentration of the hypochlorous acid gas during the stable operation control period. When it is detected, the stable operation control is stopped and the diffusion operation control is executed for a predetermined period. Specifically, the control unit 32 acquires the measured value of the concentration of the hypochlorous acid gas from each of the plurality of hypochlorous acid gas sensors 50, and it is necessary to execute the diffusion operation control based on the acquired measured value. To judge. When it is determined that the diffusion operation control is to be executed, the control unit 32 executes the diffusion operation control for a predetermined period, and again executes the stable operation control after the elapse of the predetermined period.

Further, the control unit 32 further executes local operation control. The local operation control is an example of third control for discharging gas toward a predetermined position. For example, the control unit 32 executes the local operation control when the detected concentration is below a predetermined reference value. The reference value here is, for example, the minimum reference value which is the minimum concentration of hypochlorous acid gas required to exert the sterilizing effect. The reference value may be higher than the lowest reference value.

Specifically, when the hypochlorous acid gas sensor 50 detects a decrease in concentration, the control unit 32 controls the discharge direction so that the gas is discharged toward the position where the decrease is detected. The direction in which the decrease in concentration is detected is determined from among the nine emission directions shown in FIG. 8, and gas is emitted from the emission port 10 in the determined direction.

For example, when the concentration at the detection position of the hypochlorous acid gas sensor 50a shown in FIG. 12 decreases, the detection position is located on the left side of the discharge port 10 and at a position far from the discharge port 10. Therefore, the control unit 32 selects the discharge direction A and causes the discharge port 10 to discharge the gas in the discharge direction A. When the concentration of the detection position of the hypochlorous acid gas sensor 50b decreases, the detection position is located in front of the discharge port 10 and near the discharge port 10. Therefore, the control unit 32 selects the discharge direction H and causes the discharge port 10 to discharge the gas in the discharge direction H.

When the decrease in the density is detected at the plurality of detection positions, the control unit 32 sequentially selects the emission directions toward the detection positions, for example. The order of selection is, for example, from the lowest density, but is not limited to this.

[motion]
Next, the operation of the hypochlorous acid gas releasing system 3 according to the present embodiment, that is, the hypochlorous acid gas releasing method will be described.

FIG. 13 is a flowchart showing the operation of the hypochlorous acid gas releasing system 3 according to this embodiment. As shown in FIG. 13, the processes (S10 to S16) from the execution of the diffusion operation control to the maintenance of the stable operation control are the same as those in the first embodiment.

In the present embodiment, during the period during which the stable operation control is being executed (No in S16), the control unit 32 causes the concentration of the hypochlorous acid gas detected by at least one of the plurality of hypochlorous acid gas sensors 50. It is determined whether or not has changed (S20). When the concentration of hypochlorous acid gas has not changed (No in S20), the control unit 32 returns to step S14 and maintains stable operation control.

When the concentration of hypochlorous acid gas has changed (Yes in S20), the control unit 32 compares the detected concentration with the minimum reference value (S22). When the detected concentration is equal to or higher than the minimum reference value (No in S22), the control unit 32 returns to step S10 and executes the diffusion operation control again. As a result, the concentration of hypochlorous acid gas can be made uniform in a short period of time.

When the detected concentration is lower than the minimum reference value (Yes in S22), the control unit 32 executes local operation control (S24). Specifically, the control unit 32 causes the gas to be discharged from the discharge port 10 toward the position where the concentration lower than the lowest reference value is detected. After executing the local operation control for a certain period, the control unit 32 returns to step S10 and executes the diffusion operation control again. As a result, the concentration of hypochlorous acid gas can be made uniform in a short period of time.

The control unit 32 may compare the concentration of hypochlorous acid gas with the minimum reference value after executing the local operation control and before executing the diffusion operation control. When the concentrations at the detection positions of all the hypochlorous acid gas sensors 50 become higher than the lowest reference value, the control unit 32 may execute the diffusion operation control.

[Effects]
As described above, the hypochlorous acid gas release system 3 according to the present embodiment further includes the hypochlorous acid gas sensor 50 that detects the concentration of the hypochlorous acid gas in the space where the gas is released. Further, when the hypochlorous acid gas sensor 50 detects a change in the concentration of the hypochlorous acid gas within the period of executing the stable operation control, the control unit 32 stops the stable operation control and performs the diffusion operation. The control is executed for a predetermined period.

As a result, the diffusion operation control can be executed when the uniformity of the concentration of hypochlorous acid gas in the target space is impaired. Therefore, the concentration of the hypochlorous acid gas can be made uniform in a short period of time, so that the state in which the concentration of the hypochlorous acid gas in the target space is highly uniform can be maintained for a long period of time.

Further, for example, the hypochlorous acid gas release system 3 may further include a hypochlorous acid gas sensor 50 that detects the concentration of the hypochlorous acid gas at a predetermined position in the space where the gas is released. When the hypochlorous acid gas sensor 50 detects a decrease in the concentration of the hypochlorous acid gas, the control unit 32 further performs local operation control for controlling the discharge direction so that the gas is discharged toward a predetermined position. Execute.

As a result, the hypochlorous acid gas can be promptly supplied toward the position where the hypochlorous acid gas is insufficient, so that the state in which the disinfection effect in the target space is high can be maintained.

Further, for example, the predetermined position is a position where the concentration of hypochlorous acid gas, which is predetermined based on the environment in the space, is likely to decrease.

Accordingly, the number of hypochlorous acid gas sensors 50 arranged in the target space can be reduced, so that the control load can be reduced and the cost can be reduced. Further, since the concentration at the position where the concentration of hypochlorous acid gas is likely to decrease is detected, it is possible to appropriately detect the concentration change in the target space. Therefore, it is possible to maintain a state in which the concentration of hypochlorous acid gas in the target space is highly uniform for a long period of time.

When a plurality of hypochlorous acid gas sensors 50 are provided, it is possible to finely detect a change in the concentration of the hypochlorous acid gas in the target space, so that the concentration of the hypochlorous acid gas can be made uniform with high accuracy. Can be done at. The number of hypochlorous acid gas sensors 50 included in the hypochlorous acid gas release system 3 may be only one.

(Embodiment 4)
Subsequently, a fourth embodiment will be described.

[Constitution]
FIG. 14: is a block diagram which shows the structure of the hypochlorous acid gas release system 4 which concerns on this Embodiment. As shown in FIG. 14, the hypochlorous acid gas release system 4 is newly provided with a ventilation facility 60 and an air conditioning facility 70, as compared with the hypochlorous acid gas release system 1 according to the first embodiment, The difference is that a control unit 33 is provided instead of the control unit 30. In the following, differences from the first embodiment will be mainly described, and description of common points will be omitted or simplified.

The ventilation facility 60 is a facility that ventilates the target space from which gas is released. The ventilation facility 60 is, for example, a ventilation fan, a blower, or a ventilator.

The air conditioning facility 70 is a facility that performs air conditioning in the target space from which gas is released. The air conditioning facility 70 generates an airflow in the target space, for example. The air conditioning equipment 70 is an air conditioner, a fan, a blower, or the like.

In addition to the operation of the control unit 30, the control unit 33 according to the present embodiment stops the operation of the ventilation equipment 60 and the air conditioning equipment 70 before starting the execution of the diffusion operation control. Specifically, the control unit 33 causes the ventilation facility 60 and the air conditioning facility 70 to stop the operations related to the air flow generation. The diffusion operation control may be performed and the operations of the ventilation equipment 60 and the air conditioning equipment 70 may be stopped at the same time.

[motion]
Next, the operation of the hypochlorous acid gas releasing system 4 according to the present embodiment, that is, the hypochlorous acid gas releasing method will be described.

FIG. 15 is a flowchart showing the operation of the hypochlorous acid gas releasing system 4 according to the present embodiment. As shown in FIG. 15, when the start signal is issued, the control unit 33 first stops the operations of the ventilation equipment 60 and the air conditioning equipment 70 (S30). After that, the control unit 33 executes the diffusion operation control (S10).

When a predetermined period has elapsed from the start of gas release (Yes in S12), the control unit 33 restarts the operation of the ventilation equipment 60 and the air conditioning equipment 70 (S32). The operation may not be restarted.

After that, the control unit 30 stops the diffusion operation control and executes the stable operation control (S14). After that, the control unit 30 maintains the stable operation control until the operation of the hypochlorous acid gas releasing system 4 is completed (No in S16). Steps S10, S12, S14 and S16 according to the present embodiment are the same as those in the first embodiment.

[Effects]
As described above, the hypochlorous acid gas release system 4 according to the present embodiment further includes the ventilation facility 60 or the air conditioning facility 70 for performing ventilation or air conditioning of the space where the gas is released. The control unit 33 further stops the operation of the ventilation equipment 60 or the air conditioning equipment 70 before starting the execution of the diffusion operation control.

Thereby, the airflow resulting from ventilation or air conditioning is suppressed in the target space. As a result, it is possible to prevent the released hypochlorous acid gas from being discharged from the target space by the exhaust gas and disappearing, or being sucked into the air conditioner and decomposed. In this way, by interlocking with the ventilation equipment 60 or the air conditioning equipment 70, the disappearance of the hypochlorous acid gas can be suppressed, and the concentration can be made uniform in a shorter period of time.

(Other)
Although the hypochlorous acid gas releasing system and the like according to the present invention have been described above based on the above-described embodiments, the present invention is not limited to the above-described embodiments.

For example, the discharge port 10 may not be provided with at least one of the louvers 11 and 12. For example, instead of the louvers 11 and 12, the outlet 10 may be provided with a blower capable of changing the wind direction. The control unit 30 may change the discharge direction of the gas by controlling the blower. Alternatively, the control unit 30 may change the discharge direction of the gas by controlling the air conditioning equipment 70.

Further, the discharge port 10 may be capable of discharging a gas containing hypochlorous acid gas in a plurality of directions at the same time. For example, at least one of the plurality of louvers 11 and the plurality of louvers 12 may be rotatable in different directions.

Further, for example, the combinations of the respective implementations may be combined appropriately. The hypochlorous acid gas release system includes an outlet 10, a generation unit 20, a control unit 30, a disturbance detection sensor 40, a hypochlorous acid gas sensor 50, a ventilation facility 60, and an air conditioning facility 70. Good. In this case, the control unit 30 executes each function described in each embodiment.

For example, when the hypochlorous acid gas release system 1 includes a plurality of hypochlorous acid gas sensors 50, the control unit 30 determines the release direction fixed in the stable operation control based on the detection result of the hypochlorous acid gas sensor 50. You may decide. For example, the control unit 30 may discharge the gas toward the position where the lowest concentration is detected among the plurality of detection positions.

Further, for example, the hypochlorous acid gas release system does not have to include at least one of the generation unit 20, the disturbance detection sensor 40, the hypochlorous acid gas sensor 50, the ventilation equipment 60, and the air conditioning equipment 70. Good. For example, the hypochlorous acid gas release system does not include the generation unit 20, acquires the hypochlorous acid gas generated by another system, and releases the gas containing the acquired hypochlorous acid gas from the emission port 10. May be released.

Further, the communication method between the devices described in the above embodiment is not particularly limited. When wireless communication is performed between devices, the wireless communication method (communication standard) is, for example, short-distance wireless communication such as ZigBee (registered trademark), Bluetooth (registered trademark), or wireless LAN (Local Area Network). is there. Alternatively, the wireless communication method (communication standard) may be communication via a wide area communication network such as the Internet. Wired communication may be performed between the devices instead of wireless communication. The wired communication is, for example, power line communication (PLC) or communication using a wired LAN.

Further, in the above-described embodiment, the processing executed by the specific processing unit may be executed by another processing unit. Further, the order of the plurality of processes may be changed, or the plurality of processes may be executed in parallel. Further, the allocation of the constituent elements of the hypochlorous acid gas releasing system 1, 2, 3 or 4 to a plurality of devices is an example. For example, a component included in one device may be included in another device.

Also, the hypochlorous acid gas releasing system 1, 2, 3 or 4 may be realized as a single device. For example, the above-mentioned hypochlorous acid gas releasing system 1, 2, 3 or 4 may be realized as a single device housed in one housing. The single device may be easily portable and may be freely placed in space.

For example, the processing described in the above embodiments may be realized by centralized processing using a single device (system), or may be realized by distributed processing using a plurality of devices. Good. Further, the processor that executes the above program may be a single processor or a plurality of processors. That is, centralized processing may be performed or distributed processing may be performed.

Further, in the above embodiment, all or some of the components such as the control unit may be configured by dedicated hardware, or realized by executing a software program suitable for each component. Good. Each component may be realized by a program executing unit such as a CPU (Central Processing Unit) or a processor reading and executing a software program recorded in a recording medium such as an HDD (Hard Disk Drive) or a semiconductor memory. Good.

In addition, components such as the control unit may be configured by one or a plurality of electronic circuits. Each of the one or more electronic circuits may be a general-purpose circuit or a dedicated circuit.

The one or more electronic circuits may include, for example, a semiconductor device, an IC (Integrated Circuit), an LSI (Large Scale Integration), or the like. The IC or LSI may be integrated on one chip or may be integrated on a plurality of chips. Although referred to as an IC or an LSI here, it may be called a system LSI, a VLSI (Very Large Scale Integration), or a ULSI (Ultra Large Scale Integration) depending on the degree of integration. An FPGA (Field Programmable Gate Array) that is programmed after manufacturing the LSI can also be used for the same purpose.

In addition, the general or specific aspects of the present invention may be implemented by a system, an apparatus, a method, an integrated circuit, or a computer program. Alternatively, it may be realized by a computer-readable non-transitory recording medium such as an optical disk, an HDD, or a semiconductor memory in which the computer program is stored. Further, the system, the device, the method, the integrated circuit, the computer program, and the recording medium may be implemented in any combination.

In addition, it is realized by making various modifications to those skilled in the art by those skilled in the art, or by arbitrarily combining the components and functions of each embodiment without departing from the spirit of the present invention. The form is also included in the present invention.

1, 2, 3, 4 Hypochlorous acid gas release system 10 Release ports 30, 31, 32, 33 Control unit 40 Disturbance detection sensor (first sensor)
50, 50a, 50b, 50c, 50d Hypochlorous acid gas sensor (second sensor)
60 Ventilation equipment 70 Air conditioning equipment 90 Space

Claims (11)

A discharge port for discharging a gas containing hypochlorous acid gas,
And a control unit for controlling the discharge direction of the gas from the discharge port,
The control unit is
The first control for changing the release direction with time is executed for a predetermined period from the start of the release of the gas,
A hypochlorous acid gas release system that executes the second control for fixing the release direction after the lapse of the predetermined period. The hypochlorous acid gas release system according to claim 1, wherein the predetermined period is a period determined based on the number of ventilations of the space where the gas is released. The hypochlorous acid gas release system according to claim 1, wherein the control unit continuously changes the release direction within a predetermined range when executing the first control. The hypochlorous acid gas release system according to claim 1 or 2, wherein the control unit discretely changes the release direction within a predetermined range when executing the first control. Furthermore, a first sensor for detecting a factor that changes the concentration of the hypochlorous acid gas in the space where the gas is released is provided,
The control unit further stops the second control and executes the first control for the predetermined period of time when the factor is detected by the first sensor within a period of executing the second control. The hypochlorous acid gas releasing system according to any one of claims 1 to 4. Furthermore, a second sensor for detecting the concentration of hypochlorous acid gas in the space from which the gas is released is provided,
The control unit further stops the second control when a change in the concentration of the hypochlorous acid gas is detected by the second sensor within a period during which the second control is executed, The hypochlorous acid gas release system according to claim 1, wherein the first control is executed for the predetermined period. Furthermore, a second sensor for detecting the concentration of the hypochlorous acid gas at a predetermined position in the space where the gas is released is provided,
The control unit further controls the discharge direction so that the gas is discharged toward the predetermined position when the decrease in the concentration of the hypochlorous acid gas is detected by the second sensor. The hypochlorous acid gas releasing system according to any one of claims 1 to 5, which executes control. The hypochlorous acid gas releasing system according to claim 7, wherein the predetermined position is a position where a decrease in concentration of hypochlorous acid gas, which is predetermined based on an environment in the space, is likely to occur. Furthermore, it is equipped with equipment for ventilation or air conditioning of the space from which the gas is released,
The hypochlorous acid gas release system according to any one of claims 1 to 8, wherein the control unit further stops the operation of the equipment before starting the execution of the first control. The first control for changing with time the emission direction of the gas from the emission port that emits the gas containing hypochlorous acid gas is executed for a predetermined period from the start of the emission of the gas,
The hypochlorous acid gas releasing method, wherein the second control for fixing the releasing direction is executed after the lapse of the predetermined period. A program for causing a computer to execute the hypochlorous acid gas releasing method according to claim 10.

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