Sterilization System

Abstract

To provide a sterilization system capable of properly sterilizing a guest room.SOLUTION: There is provided a sterilization system 20 for sterilizing a guest room 10 during a replacement period of the guest room 10 of a hotel 1, the sterilization system comprising: sterilization means for sterilizing the guest room 10 and including, an ozone generator 21 which can discharge a gas-state sterilization component into the guest room 10; and a control part 22 for determining one operation pattern out of a plurality of preset operation patterns of the sterilization means, so as to complete sterilization of the guest room 10 within a residual period until the replacement period finishes, according to priority sequence based on a prescribed reference.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a technology for a sterilization system for sterilizing spaces in a building that are used by a rotating group of users. [Background technology]

[0002] Conventionally, techniques for sterilizing spaces in buildings that are used by users in succession have been publicly known, as described in Patent Document 1, for example.

[0003] The ozone sterilization deodorizer described in Patent Document 1 can emit ozone from an ozone air generator installed inside the device body. By installing the ozone sterilization deodorizer in a guest room (a space in a building that is used by multiple users), the room can be sterilized.

[0004] At accommodation facilities, check-out and check-in times vary depending on the guest room, so it is necessary to appropriately sterilize the guest room according to the check-out time, etc. However, Patent Document 1 does not mention sterilization of the guest room. For this reason, there has been a demand for technology that can appropriately sterilize guest rooms. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-143581 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and the problem it aims to solve is to provide a sterilization system that can appropriately sterilize a space that is used by users in rotation. [Means for solving the problem]

[0007] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0008] That is, claim 1 provides a sterilization system for sterilizing a space in a building during a replacement period when spaces are used by users, the sterilization system comprising: a sterilization means for sterilizing the space, the sterilization means including a sterilization device capable of releasing a gaseous sterilizing component into the space; and a control means for determining one of a plurality of preset operation patterns of the sterilization means in accordance with a priority order based on a predetermined criterion so that sterilization of the space is completed during the remaining period until the end of the replacement period. The determined operation pattern includes a first period during which the sterilization component is released into the space by operation of the sterilization device; Operation of the sterilization device of Stop At the same time, the discharge of the sterilizing component to the outside of the space is promoted compared to the first period, a second period during which the disinfecting component released during the first period is discharged from the space or inactivated; , is included in the remaining period, and the plurality of operation patterns include a first operation pattern in which a target component concentration in the space due to the sterilization component is set to a first concentration based on a predetermined environmental standard during the first period, and a second operation pattern in which the target component concentration is set to a second concentration higher than the first concentration, and the first operation pattern is set to have a higher priority than the second operation pattern. It is something.

[0011] Claim 2 In the above, the sterilization means includes space The plurality of operation patterns include a third operation pattern in which the ventilation fan is operated at a first air volume during at least one of the first period and the second period, and a fourth operation pattern in which the ventilation fan is operated at a second air volume that is smaller than the first air volume, and the fourth operation pattern is set to have a higher priority than the third operation pattern.

[0012] Claim 3 In the above, the space is a guest room of a lodging facility, the ventilation fan is installed in a unit bath area within the guest room, the sterilization device is installed so as to be able to release the sterilization component into a space within the guest room different from the unit bath area, and the third operating pattern includes a sixth operating pattern in which the ventilation fan is operated at the first air volume over the first period and the second period.

[0013] Claim 4In the above, the plurality of driving patterns includes a seventh driving pattern in which the first period and the second period are repeated twice with a predetermined period between them, and the seventh driving pattern is set to have a higher priority than the other driving patterns.

[0014] Claim 5 In the system, the spaces are guest rooms in a lodging facility, and the control means assigns one of the plurality of operating patterns to each guest room based on predetermined assignment information including at least information regarding the priority and information regarding the replacement period for each guest room.

[0015] Claim 6 In the above, the allocation information includes information regarding the number of guest rooms for which the workers can carry out the replacement preparation work during the replacement period in the same time period. [Effects of the Invention]

[0016] The present invention has the following effects.

[0017] According to claim 1, the space can be sterilized by users rotating in and out appropriately. Furthermore, the operation of the sterilization device can be optimized, and it is possible to simultaneously sterilize the space and prevent the sterilizing components from reaching a relatively high concentration.

[0020] Claim 2 In this case, it is possible to achieve both sterilization of the space and energy saving effects.

[0021] Claim 3 In this case, the disinfecting component can be quickly distributed throughout the entire guest room.

[0022] Claim 4 In this case, it is possible to make it easier for workers to carry out replacement preparation work in the space after sterilization.

[0023] Claim 5 In this case, one operation pattern can be appropriately assigned to each guest room so as to suit the respective replacement period.

[0024] Claim 6 In this system, an operator can assign one operation pattern to each guest room, taking into consideration the preparation work for replacement. [Brief explanation of the drawings]

[0025] [Figure 1] 1A is a floor plan of a hotel to which the sterilization system according to the first embodiment of the present invention is applied; FIG. 1B is a diagram showing guest rooms and the sterilization system; [Figure 2] FIG. [Figure 3] (a) A diagram showing a rapid pattern. (b) A diagram showing a rapid exhaust pattern. [Figure 4] (a) Standard pattern. (b) Standard exhaust pattern. [Figure 5] FIG. 10 is a diagram showing a guest room and a sterilization system according to a second embodiment. [Figure 6] FIG. 10 is a diagram showing an operation pattern according to a second embodiment. [Figure 7] A diagram showing the two-step sterilization pattern. [Figure 8] A diagram showing check-in and check-out times for each guest room. [Figure 9] FIG. 10 is a diagram showing the state in which cleaning times are allocated. [Figure 10] FIG. 10 is a diagram showing a state in which the allocation of cleaning time and sterilization time has been completed. [Figure 11] 10A is a diagram showing a guest room and a sterilization system according to a third embodiment; FIG. 10B is a diagram showing a bathroom sterilization pattern; DETAILED DESCRIPTION OF THE INVENTION

[0026] The configuration of a hotel 1 in which a sterilization system 20 according to the first embodiment is installed will be described below with reference to FIG.

[0027] Hotel 1 is an accommodation facility for guests (those using guest rooms 10). Hotel 1 is a multi-story building. Hotel 1 has multiple guest rooms 10. Note that in Figure 1(a), guest rooms 10 on the second floor of hotel 1 are shown, and guest rooms 10 on other floors are not shown.

[0028] Guest room 10 comprises bedroom 11, corridor 12, and unit bathroom 13. Bedroom 11 is equipped with a bed 11a, a table 11b, and the like. Unit bathroom 13 is partitioned from bedroom 11 and corridor 12. Unit bathroom 13 is equipped with bathroom exhaust fan 13a. Bathroom exhaust fan 13a operates 24 hours a day to exhaust air from within guest room 10 to the outside of hotel 1. Guest room 10 is ventilated throughout the day by introducing outside air into guest room 10 via the corridor or the like. Bathroom exhaust fan 13a is configured to have its airflow adjustable in stages. More specifically, bathroom exhaust fan 13a is configured to be adjustable to "24-hour ventilation," "weak," and "strong," in order of decreasing airflow. Bathroom exhaust fan 13a normally operates (when performing 24-hour ventilation) with its airflow set to "24-hour ventilation." Bathroom exhaust fan 13a can also operate with its airflow set to "weak" or "strong" by user operation. It should be noted that guest room 10 does not necessarily need to be ventilated 24 hours a day using bathroom ventilation fan 13a, and may be ventilated 24 hours a day using a dedicated ventilation fan for 24-hour ventilation, for example.

[0029] The guest room 10 configured as described above is a space that is used by users in a rotating manner. In the guest room 10, cleaning staff perform a replacement preparation work between the time a user checks out and the time the next user checks in (hereinafter referred to as the "replacement period"). The replacement preparation work refers to the work of preparing the environment of the guest room 10 so that the next user can use the guest room 10. The replacement preparation work includes cleaning the guest room 10.

[0030] The sterilization system 20 is for sterilizing the guest rooms 10 of the hotel 1 during the replacement period. More specifically, the sterilization system 20 sterilizes the guest rooms 10 from the completion of the replacement preparation work until the replacement period has elapsed. As shown in FIG. 1(b), the sterilization system 20 includes an ozone generator 21 and a control unit 22.

[0031] The ozone generator 21 is for generating a gaseous sterilizing component. In this specification, the sterilizing component refers to one that can kill bacteria and inactivate viruses. Furthermore, "gaseous" refers to a state in which it can move along with the air flow. The ozone generator 21 can generate ozone as a sterilizing component. The ozone generator 21 is installed on the ceiling of the bedroom 11 and can release the generated ozone into the guest rooms 10. An ozone generator 21 is installed in each guest room 10.

[0032] Control unit 22 controls the equipment for sterilizing each guest room 10 (in the first embodiment, bathroom ventilation fan 13a and ozone generator 21). Control unit 22 includes a processing unit such as a CPU, and storage devices such as RAM and ROM. Control unit 22 also stores various programs for operating sterilization system 20 in the storage device. Control unit 22 is configured to be able to communicate with a terminal (not shown) owned by a cleaner and / or manager, and can obtain the check-out time (scheduled time) for each guest room 10 from the terminal. Control unit 22 is configured to be able to send signals to bathroom ventilation fan 13a and ozone generator 21 in each guest room 10.

[0033] Control unit 22 can switch between starting and stopping the operation (operation) of bathroom ventilation fan 13a and adjust the airflow volume by sending a signal to bathroom ventilation fan 13a. Control unit 22 can also switch between starting and stopping the operation (operation) of ozone generator 21 and adjust the amount of ozone generated by sending a signal to ozone generator 21. By adjusting the amount of ozone generated, control unit 22 can arbitrarily adjust the ozone concentration in guest room 10. By operating ozone generator 21 to release ozone into guest room 10, control unit 22 can inactivate pathogens in guest room 10 (kill bacteria or decompose viruses, thereby rendering the pathogens infective) and sterilize guest room 10.

[0034] The following provides an overview of sterilization of the guest room 10 by the sterilization system 20 (control unit 22).

[0035] The sterilization of the guest room 10 by the sterilization system 20 is triggered by an instruction from a cleaner. More specifically, after completing the replacement preparation work, the cleaner and / or manager operates a terminal to input the check-in time of the guest room 10 to the control unit 22. The control unit 22 controls the ozone generator 21 and the like so that the sterilization of the guest room 10 is completed by the input check-in time. More specifically, the control unit 22 controls the ozone generator 21 and the like so that the CT value (Concentration-Time Value) and the ozone concentration in the guest room 10 satisfy predetermined conditions until the sterilization of the guest room 10 is completed.

[0036] Specifically, the CT value is the product of the ozone concentration (ppm) and the exposure time (min). The exposure time refers to the time that an object is exposed to ozone. By calculating the CT value, it is possible to understand the extent to which pathogens have been inactivated. For example, if the CT value is 60, it can be determined that 90% or more of a given pathogen has been inactivated. The relationship between the CT value and the percentage of pathogens that can be inactivated is determined appropriately for each pathogen through experiments, etc.

[0037] The control unit 22 presets a target value (e.g., 60) for the CT value based on the above-mentioned relationship for the pathogen to be inactivated. The control unit 22 controls the ozone generator 21 and the like so that the CT value reaches the target value (satisfies a predetermined condition) before sterilization of the guest room 10 is completed.

[0038] Furthermore, ozone can be harmful to the human body depending on its concentration. Taking into consideration such effects on the human body, a working environment standard (a standard that is desirable to maintain) has been established for ozone concentration. Specifically, 0.1 ppm has been established as the working environment standard. When sterilizing a guest room 10, the control unit 22 reduces the ozone concentration in the guest room 10 to below the working environment standard (to satisfy predetermined conditions). Specifically, the control unit 22 reduces the ozone concentration to below 0.05 ppm. Hereinafter, the ozone concentration (0.05 ppm) at the completion of sterilization using ozone will be referred to as the "ozone concentration at completion."

[0039] In this way, when sterilizing the guest room 10, the control unit 22 makes the CT value reach the target value and reduces the ozone concentration in the guest room 10 to or below the ozone concentration at completion. In this way, the control unit 22 inactivates pathogens and makes the guest room 10 ready for entry to the user. As shown in FIG. 2, the control unit 22 is configured to be able to execute a plurality of operation patterns P10 as a process for sterilizing the guest room 10.

[0040] The operation pattern P10 will be described below with reference to FIGS.

[0041] Operation pattern P10 refers to a process that controls bathroom exhaust fan 13a and ozone generator 21 in a predetermined manner. Operation pattern P10 includes rapid pattern P11, rapid exhaust pattern P12, standard pattern P13, and standard exhaust pattern P14. Figures 3 and 4 show the results of a simulation of the relationship between ozone concentration and time in guest room 10 when rapid pattern P11 and other patterns are started at 11:40.

[0042] The rapid pattern P11 shown in FIGS. 2 and 3(a) is a pattern that completes sterilization using ozone in a relatively short time (compared to the standard pattern P13, etc., described later). The rapid pattern P11 increases the ozone concentration in the guest room 10 to a relatively high concentration, thereby allowing the CT value to reach the target value in a short time. Specifically, when the rapid pattern P11 is executed, the control unit 22 starts the operation of the ozone generator 21 (11:40 in FIG. 3(a)) and releases ozone into the guest room 10 to increase the ozone concentration. The control unit 22 continues to release ozone for a predetermined time, increasing the ozone concentration in the guest room 10 to a predetermined concentration. Specifically, the control unit 22 increases the ozone concentration to approximately 1 ppm so that the ozone concentration does not significantly exceed the working environment standard (0.1 ppm). Hereinafter, the time during which ozone is released into the guest room 10 is referred to as the "inactivation time." The ozone concentration (target concentration) that is increased during the inactivation time in the rapid exhaust pattern P11 and the rapid exhaust pattern P12 described later is referred to as a "first target concentration."

[0043] When the ozone concentration in the guest room 10 has increased to the first target concentration, the control unit 22 stops the ozone generator 21 (12:50 in FIG. 3(a)) and reduces the ozone concentration in the guest room 10. When the control unit 22 reduces the ozone concentration in the guest room 10 to below the ozone concentration at completion (14:10 in FIG. 3(a)), it ends the rapid pattern P11. Hereinafter, the time from when the ozone generator 21 is stopped until the ozone concentration is reduced to below the ozone concentration at completion will be referred to as the "standby time." Furthermore, the sum of the inactivation time and the standby time (the time from when the operation pattern P10 starts to when it ends) will be referred to as the "total time."

[0044] In the rapid pattern P11, the inactivation time and waiting time are set in advance so that the CT value reaches the target value during the waiting time and the ozone concentration in the guest room 10 becomes equal to or lower than the ozone concentration at completion. Specifically, the inactivation time, etc. are set by simulating the rapid pattern P11 using the following formula 1.

number

[0045] When simulating the rapid pattern P11 using the above formula 1, the volume of the guest room 10 is substituted for the air volume R. The ventilation rate for 24-hour ventilation of the guest room 10 is substituted for the ventilation rate n. The amount of ozone generated by the ozone generator 21 is substituted for the ozone generation amount M. The half-life of ozone in the guest room 10 is substituted for the half-life T.

[0046] Equation 1 above calculates the ozone concentration taking into account the effects of 24-hour ventilation in guest room 10. Specifically, as described above, guest room 10 is ventilated all day long by bathroom ventilation fan 13a. Therefore, when ozone is released into guest room 10, some of the ozone is sucked into bathroom ventilation fan 13a and expelled outside guest room 10, while outside air is introduced into guest room 10, resulting in a decrease in the ozone concentration in guest room 10. Equation 1 above assumes that the ozone concentration in the outside air is 0 ppm, and calculates the effect of the 24-hour ventilation (the degree of decrease in ozone concentration during the period determined by time step t) as "C0*R / R+nRt."

[0047] Furthermore, in the above formula 1, the theoretical value of ozone concentration (the theoretical value of ozone concentration that increases due to the operation of ozone generator 21) is calculated using "M / R*2.14." This theoretical value of ozone concentration is added to the effect of 24-hour ventilation (C0*R / R+nRt) to calculate the ozone concentration when ozone is released while bathroom exhaust fan 13a is operating. This summation result does not reflect the effect of natural decrease (inactivation) of ozone.

[0048] Therefore, in the above formula 1, "(1 / 2) t / T" is multiplied by the above total result to determine the ozone concentration in guest room 10, taking into account the effects of 24-hour ventilation and natural attenuation.

[0049] FIG. 3(a) shows the results of simulating the rapid pattern P11 using Equation 1 and determining the inactivation time and standby time for the rapid pattern P11. In FIG. 3(a), the operation of the ozone generator 21 is started at 11:40, and the ozone concentration in the guest room 10 rises to the first target concentration (approximately 1 ppm) by 12:50 (see "Inactivation Time"). Also, in FIG. 3(a), the operation of the ozone generator 21 is stopped at this timing, and the ozone concentration falls to or below the ozone concentration at completion (0.05 ppm) by 14:10 (see "Standby Time"). In FIG. 3(a), the area of ​​the graph (CT value) in the range from 11:40 to 14:10 exceeds the target value.

[0050] As shown in Figures 2 and 3(a), in rapid pattern P11, based on the simulation results described above, the inactivation time (11:40 to 12:50 in Figure 3(a)) is set to "70 minutes." Also, the standby time (12:50 to 14:10 in Figure 3(a)) is set to "80 minutes." Thus, the total time for rapid pattern P11 is "150 minutes."

[0051] 2 and 3(b), rapid exhaust pattern P12 is a pattern that performs ozone sterilization in a shorter time than rapid pattern P11. Rapid exhaust pattern P12 differs from rapid pattern P11 in that bathroom exhaust fan 13a is operated at a higher airflow rate ("high") than in the "24-hour ventilation" mode during standby.

[0052] FIG. 3(b) shows the results of simulating rapid exhaust pattern P12 using Equation 1 to determine the inactivation time and standby time for rapid exhaust pattern P12. With rapid exhaust pattern P12, ozone is drawn into bathroom exhaust fan 13a, which has a high airflow setting, during the standby time and expelled outside guest room 10, resulting in the ozone concentration falling below the completion ozone concentration in a shorter time than with rapid exhaust pattern P11. For this reason, as shown in FIGS. 2 and 3, the standby time for rapid exhaust pattern P12 is set to 40 minutes, shorter than that of rapid pattern P11. The inactivation time for rapid exhaust pattern P12 is set to 70 minutes, the same as that of rapid pattern P11. Thus, the total time for rapid exhaust pattern P12 is 110 minutes. When simulating rapid exhaust pattern P12 using Equation 1, the ventilation rate for bathroom exhaust fan 13a with a high airflow setting is substituted for ventilation rate n when calculating the ozone concentration during the standby time.

[0053] 2 and 4(a) is a pattern for sterilizing with a lower ozone concentration than the rapid pattern P11 and the rapid exhaust pattern P12. When performing the standard pattern P13, the control unit 22 releases ozone into the guest room 10 to increase the ozone concentration in the guest room 10 to a concentration lower than the first target concentration (the concentration increased by the rapid pattern P11, etc.). The control unit 22 then appropriately adjusts the amount of ozone generated to maintain the ozone concentration for a predetermined time (see the inactivation time shown in FIG. 4(a)).

[0054] After maintaining the ozone concentration for a predetermined time, the control unit 22 stops the operation of the ozone generator 21, and reduces the ozone concentration in the guest room 10 to or below the completion ozone concentration (see the standby time shown in Figure 4(a)). In standard pattern P13, the ozone concentration is maintained during the inactivation time so that the CT value reaches the target value. According to standard pattern P13, it is possible to sterilize the guest room 10 at an ozone concentration that has less impact on the human body than rapid pattern P11. Hereinafter, the ozone concentration (target concentration) maintained during the inactivation time in standard pattern P13 and standard exhaust pattern P14, which will be described later, is referred to as the "second target concentration."

[0055] The second target concentration is set based on the working environment standard (0.05 ppm) and the first target concentration (approximately 1 ppm). Specifically, it is set at 0.5 ppm, which is about halfway between the working environment standard and the first target concentration.

[0056] FIG. 4(a) shows the results of simulating standard pattern P13 using Equation 1 to determine the inactivation time and standby time for standard pattern P13. In standard pattern P13, the ozone concentration in the passenger compartment 10 is maintained at a second target concentration, which is lower than the first target concentration. Therefore, as shown in FIGS. 2 and 4(a), the inactivation time for standard pattern P13 is set to 130 minutes, which is longer than the rapid pattern P11 and rapid exhaust pattern P12. The standby time is set to 50 minutes, which is shorter than the rapid pattern P11 and rapid exhaust pattern P12. Thus, the total time for standard pattern P13 is 180 minutes. When simulating standard pattern P13 using Equation 1, the value required to maintain the second target concentration is appropriately substituted for the ozone generation amount M at the timing when the ozone concentration is to be maintained.

[0057] Standard exhaust pattern P14 shown in Figures 2 and 4(b) is a pattern that performs ozone sterilization in a shorter time than standard pattern P13. Standard exhaust pattern P14 differs from standard pattern P13 in that bathroom exhaust fan 13a is operated at a higher airflow rate ("high") than in "24-hour ventilation" during standby time.

[0058] Figure 4(b) shows the results of simulating standard exhaust pattern P14 using Equation 1 above to determine the inactivation time and standby time for standard exhaust pattern P14. With standard exhaust pattern P14, the airflow rate of bathroom exhaust fan 13a is higher during standby time. For this reason, as shown in Figures 2 and 4, the standby time for standard exhaust pattern P14 is set to 30 minutes, shorter than that of standard pattern P13. The inactivation time is also set to 130 minutes, the same as that of standard pattern P13. Thus, the total time for standard exhaust pattern P14 is 160 minutes. When simulating standard exhaust pattern P14 using Equation 1 above, the ventilation rate when bathroom exhaust fan 13a's airflow rate is set to "high" is substituted for ventilation rate n when calculating the ozone concentration during standby time.

[0059] The control unit 22 sets priorities in advance for the operation patterns P10 configured as described above. The priorities are indicators that indicate the priority of the execution of the operation patterns P10. The higher the priority, the more priority is given to execution. The control unit 22 sets the priorities based on the effects of ozone on the human body and energy consumption. Furthermore, the control unit 22 sets the priorities by giving priority to the effects on the human body out of the effects on the human body and energy consumption.

[0060] Specifically, standard pattern P13 and standard exhaust pattern P14 sterilize at a second target concentration lower than rapid pattern P11 and rapid exhaust pattern P12, thereby reducing the impact of ozone on the human body even if someone were to enter guest room 10. Furthermore, standard pattern P13 consumes less energy than standard exhaust pattern P14 because the airflow volume of bathroom exhaust fan 13a is lower than that of standard exhaust pattern P14. Control unit 22 assigns a priority of "1" to standard pattern P13, which has a smaller impact on the human body and consumes less energy, among these operating patterns P10. Control unit 22 assigns a priority of "2" to standard exhaust pattern P14, which has a smaller impact on the human body.

[0061] Furthermore, of the rapid pattern P11 and the rapid exhaust pattern P12, control unit 22 sets the priority of rapid pattern P11, which has the lowest air volume (energy consumption) of bathroom exhaust fan 13a, to "3." Control unit 22 also sets the priority of the remaining rapid exhaust pattern P12 to "4."

[0062] The operation of the sterilization system 20 will be described below.

[0063] The sterilization system 20 operates in response to input of check-in time by a cleaner who has completed the replacement preparation work (cleaning work) and / or a manager. When the check-in time is input, the control unit 22 calculates the remaining time until check-in (the remaining period until the replacement period ends) based on the input result and the current time. Then, the control unit 22 determines one operation pattern to be executed from the operation patterns P10 shown in Fig. 2 based on the remaining time and priority.

[0064] For example, if the remaining time is "160 minutes," the control unit 22 executes the operation pattern that can complete sterilization within the remaining time and has the highest priority. Specifically, it executes the standard exhaust pattern P14, which has the highest priority among the operation patterns P10 whose total time is 160 minutes or less.

[0065] Also, for example, if the remaining time is "180 minutes" or more, the control unit 22 executes the standard pattern P13, which has the highest priority.

[0066] If there is no operable operating pattern P10 within the remaining time (if the remaining time is shorter than the total time of the rapid exhaust pattern P12 capable of sterilization at the fastest speed), the control unit 22 will operate the ozone generator 21 at a constant ozone concentration below the working environment standard.

[0067] Furthermore, if the operation of bathroom exhaust fan 13a cannot be controlled due to its specifications (i.e., if rapid exhaust pattern P12 and standard exhaust pattern P14 cannot be executed), control unit 22 determines the operation pattern to execute from standard pattern P13 and rapid pattern P11 based on the remaining time and priority. For example, if the remaining time is 180 minutes or more, control unit 22 executes standard pattern P13. If the remaining time is 150 minutes or more but less than 180 minutes, control unit 22 executes rapid pattern P11. If the remaining time is less than 150 minutes, ozone generator 21 is operated continuously at an ozone concentration below the working environment standard.

[0068] In this way, in the sterilization system 20, by inputting the check-in time into the control unit 22, the ozone generator 21 can be operated so that sterilization is completed by the check-in time. This makes it possible to easily (with simple operations) sterilize guest rooms 10 whose check-out and check-in times vary depending on the guest room 10 and the day. This makes it easy to sterilize the guest room 10. In addition, the guest room 10 can also be deodorized using ozone.

[0069] Furthermore, the control unit 22 can sterilize the guest room 10 with an appropriate operation pattern according to the influence of ozone on the human body and the amount of energy consumption by executing one operation pattern according to the priority.

[0070] Furthermore, the control unit 22 determines the inactivation time and standby time by performing a simulation using the above-mentioned formula 1 so that the CT value reaches the target value and the ozone concentration in the guest room 10 becomes equal to or lower than the ozone concentration at completion. This makes it possible to easily obtain the inactivation time and standby time (without experimentation).

[0071] As described above, the sterilization system 20 of the first embodiment is a sterilization system 20 that sterilizes guest rooms 10 (spaces in a building that are used by users in succession) of a hotel 1 during the changeover period of the guest rooms 10, and is equipped with sterilization means (ozone generator 21 and bathroom ventilation fan 13a) for sterilizing the guest rooms 10, including an ozone generator 21 (sterilization device) that can release a gaseous sterilizing component (ozone) into the guest rooms 10, and a control unit 22 (control means) that determines one of a plurality of pre-set operating patterns P10 of the sterilization means in accordance with a priority based on predetermined criteria (effects on the human body and energy consumption) so that sterilization of the guest rooms 10 is completed within the remaining time until the end of the changeover period.

[0072] By configuring in this way, it is possible to appropriately sterilize the guest room 10 in accordance with a predetermined standard. Also, it is possible to easily sterilize the guest room 10.

[0073] In addition, the determined operating pattern has the timing of operation of the ozone generator 21 set so that the remaining period includes a first period (inactivation time) during which the sterilizing component is released into the guest room 10 by operation of the ozone generator 21, and a second period (standby time) during which the sterilizing component released during the first period is discharged or inactivated from the guest room 10 by stopping the operation of the ozone generator 21.

[0074] By configuring in this manner, pathogens are inactivated by the disinfecting component, and the concentration of the disinfecting component in the guest room 10 is reduced during the remaining period, thereby optimizing the operation of the ozone generator 21.

[0075] In addition, the multiple operating patterns P10 include a first operating pattern (standard pattern P13 and standard exhaust pattern P14) in which the target component concentration in the guest room 10 due to the sterilization component is set to a first concentration (second target concentration) based on a predetermined environmental standard (working environment standard) during the first period, and a second operating pattern (rapid pattern P11 and rapid exhaust pattern P12) in which the target component concentration is set to a second concentration (first target concentration) higher than the first concentration, and the first operating pattern is set to have a higher priority than the second operating pattern (Figure 2).

[0076] By configuring in this manner, the first operating pattern, which performs sterilization when the concentration of the sterilizing component in the guest room 10 is low, can be executed preferentially, thereby achieving both sterilization of the guest room 10 and preventing the concentration of the sterilizing component from becoming relatively high.

[0077] The hotel 1 according to the first embodiment is one embodiment of a building according to the present invention. Moreover, the guest room 10 according to the first embodiment is one embodiment of a space according to the present invention that is used by users in turn. The ozone generator 21 according to the first embodiment is one embodiment of the sterilization apparatus according to the present invention. Moreover, ozone generator 21 and bathroom ventilation fan 13a according to the first embodiment are one embodiment of the sterilization means according to the present invention. The control unit 22 according to the first embodiment is an embodiment of the control means according to the present invention.

[0078] Although the first embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0079] For example, the sterilization system 20 has been described as being applied to the hotel 1, but is not limited thereto and may be applied to accommodation facilities other than the hotel 1, such as inns. The sterilization system 20 may also be applied to buildings other than accommodation facilities. The sterilization system 20 may also be used to sterilize spaces that are used by users in succession, and may also be used to sterilize spaces other than guest rooms 10 (for example, conference rooms, banquet halls, etc.).

[0080] Furthermore, although the sterilization of the guest room 10 is performed using ozone, the sterilizing component is not particularly limited as long as it can inactivate pathogens. The sterilizing component may be, for example, ions or hypochlorous acid. It is desirable that the sterilizing component has a high sterilizing effect, such as ozone as in the first embodiment. This allows the sterilization of the guest room 10 to be performed in a short time.

[0081] Furthermore, although the ozone generator 21 is permanently installed in the guest room 10, this is not limited to this, and for example, a portable ozone generator may be installed in the guest room 10 when sterilization work is performed.

[0082] Furthermore, the location where the ozone generator 21 is installed is not limited to the bedroom 11, but may also be installed in the passageway 12 or the unit bathroom 13, for example.

[0083] Furthermore, the number of operation patterns P10 is not particularly limited, and an appropriate number of operation patterns P10 may be set depending on the volume of the passenger compartment 10, etc.

[0084] Furthermore, the values ​​of the inactivation time and standby time in the operation pattern P10 are not particularly limited, and may be changed as appropriate depending on, for example, the capacity of the passenger compartment 10, the specifications of the ozone generator 21, and the like.

[0085] In addition, in the operation pattern P10, the CT value reaches the target value during the standby time, but the timing at which the CT value reaches the target value can be any timing within the total time. For example, the CT value may reach the target value when the inactivation time ends.

[0086] Furthermore, the inactivation time and waiting time are set based on the simulation results using Equation 1, but are not limited to this and may be set based on experimental results or the like.

[0087] Furthermore, while control unit 22 sets the priority by prioritizing the effects of ozone on the human body over energy consumption, there are no particular limitations on how the priority is set. For example, the priority may be set so that rapid exhaust pattern P11 and standard pattern P13, which do not change the airflow rate of bathroom exhaust fan 13a to "high," are ranked higher than rapid exhaust pattern P12 and standard exhaust pattern P14, which change the airflow rate of bathroom exhaust fan 13a to "high."

[0088] As such, the sterilization means includes a bathroom ventilation fan 13a (ventilation fan) that promotes the exhaust of the sterilization component (ozone) released into the guest room 10, and the multiple operating patterns P10 include a third operating pattern (rapid exhaust pattern P12 and standard exhaust pattern P14) that operates the bathroom ventilation fan 13a at a first air volume ("strong") during at least one of the first period and the second period (in the first embodiment, the second period), and a fourth operating pattern (rapid pattern P11 and standard pattern P13) that operates the bathroom ventilation fan 13a at a second air volume ("24-hour ventilation") that is lower than the first air volume, and the fourth operating pattern has a higher priority than the third operating pattern.

[0089] By configuring in this way, the second operating pattern, which consumes less energy, is executed preferentially, and it is possible to achieve both sterilization of the guest room 10 and energy conservation effects.

[0090] Furthermore, although the control unit 22 determines the operation pattern by inputting the check-in time, this is not limited thereto, and the operation pattern may be determined by inputting other information. For example, the control unit 22 may determine the operation pattern by inputting information notifying the completion of cleaning work from a terminal of a cleaner and / or manager. In this case, the control unit 22 can acquire the check-in time from a server or the like installed in the hotel 1 and determine the operation pattern based on the acquired result. This configuration can save the cleaner and / or manager the trouble of checking the check-in time of the guest room 10, and can sterilize the guest room 10 with a simpler operation.

[0091] Next, a sterilization system 120 according to a second embodiment will be described with reference to FIGS.

[0092] The sterilization system 120 according to the second embodiment differs significantly from the sterilization system 20 according to the first embodiment in that it creates a work schedule S (see FIG. 10) and is capable of executing a two-step sterilization pattern P25 (see FIG. 7). The work schedule S is information indicating, for each guest room 10, a schedule of work to be performed in the guest rooms 10 during the replacement period (replacement preparation work and sterilization work). These differences will be explained below.

[0093] First, a description will be given of the configuration related to the creation of the work schedule S. A control unit 122 of a sterilization system 120 according to the second embodiment shown in Fig. 5 is configured to be able to send and receive signals to and from a management system 130 of the hotel 1.

[0094] The management system 130 manages information about the hotel 1. The management system 130 is constructed, for example, on a predetermined server. Various information is input to the management system 130 from terminals or the like installed at the front desk of the hotel 1. For example, the check-in and check-out times for each guest room 10, information about the guests (for example, the number, ages, addresses, etc. of guests scheduled to stay in the guest rooms 10), and the scheduled working hours of the cleaning staff who will perform the cleaning work are input.

[0095] The management system 130 can create information regarding the replacement period for each guest room 10 based on input results such as check-in time. Information regarding the replacement period refers to information that makes it possible to determine the replacement period for each guest room 10. FIG. 8 shows an example of this information. The time information shown in FIG. 8 includes time information that correlates whether a guest is currently using the guest room 10 (before check-out), whether the next guest is scheduled to use the guest room 10 (scheduled to check-in), the time period, and the identification information of the guest room 10 (room number in FIG. 8).

[0096] The control unit 122 can receive information necessary to create the work schedule S from the management system 130 configured as described above. Specifically, the control unit 122 can receive the time information shown in FIG. 8, information about users (such as the number, ages, and addresses of users), and the scheduled work hours of the cleaners. Based on the received scheduled work hours, the control unit 122 can calculate the maximum number of rooms that can be cleaned in the same time period (hereinafter referred to as the "maximum number of cleanings"). Based on the received information about users, the control unit 122 can evaluate the possibility (infection risk) of infection with an infectious disease in each guest room 10. As will be described later, the control unit 122 can create the work schedule S shown in FIG. 10 by assigning cleaning times (time periods for performing preparatory work for replacement), sterilization times (time periods for sterilizing the guest rooms 10 with ozone), and an operation pattern P20 to be executed to the time information shown in FIG. 8. The control unit 122 can present the created work schedule S to relevant parties of the hotel 1 by displaying the created work schedule S on a predetermined display device.

[0097] Next, the double sterilization pattern P25 will be described. As shown in Fig. 6, the operation pattern P20 of the second embodiment includes the double sterilization pattern P25 in addition to the operation pattern P10 (rapid pattern P11, etc.) of the first embodiment.

[0098] The two-time sterilization pattern P25 shown in FIGS. 6 and 7 is a pattern in which the guest room 10 is sterilized before and after cleaning (a total of two times). FIG. 7 shows the results of a simulation of the two-time sterilization pattern P25 using Equation 1 above. When executing the two-time sterilization pattern P25, the control unit 122 sterilizes the guest room 10 twice using the rapid exhaust pattern P12 (see FIG. 3(b)). More specifically, the control unit 122 performs the first sterilization (rapid exhaust pattern P12) (11:00 to 12:50 in FIG. 7) and waits until a predetermined time has elapsed (12:50 to 13:10 in FIG. 7). Then, the control unit 122 performs the second sterilization (13:10 to 15:00 in FIG. 5). In this way, the two-time sterilization pattern P25 includes two inactivation periods and two waiting periods (repeated twice).

[0099] In the double sterilization pattern P25, the ozone concentration in the guest room 10 is lower than the ozone concentration at completion during standby (between the first and second sterilization). Therefore, in the double sterilization pattern P25, cleaning work can be performed on the guest room 10 during standby (see "Cleaning Time" in FIG. 7). The control unit 122 can set the length of the standby time as desired. Thus, the total time for the double sterilization pattern P25 is the sum of the cleaning work (standby time) plus the two inactivation times and two standby times.

[0100] The control unit 122 sets priorities for the operation pattern P20 including the double sterilization pattern P25 based on the risk of infection of the cleaner with an infectious disease, the impact of ozone on the human body, and energy consumption. Furthermore, the control unit 122 sets priorities by giving the highest priority to the risk of infection among the risk of infection, the impact on the human body, and energy consumption.

[0101] Specifically, the two-step sterilization pattern P25 sterilizes the guest room 10 before and after the cleaning work. Therefore, the two-step sterilization pattern P25 can reduce the risk of infection for cleaners more than the rapid pattern P11, the rapid exhaust pattern P12, the standard pattern P13, and the standard exhaust pattern P14, which sterilize after the cleaning work. In this way, the two-step sterilization pattern P25 is the pattern that can most reduce the risk of infection among the operation patterns P20. The control unit 122 sets the priority of the two-step sterilization pattern P25 to the highest priority, "1."

[0102] Similarly to the first embodiment, the control unit 122 sets priorities for the remaining rapid exhaust pattern P11, rapid exhaust pattern P12, standard pattern P13, and standard exhaust pattern P14 based on their effects on the human body and energy consumption. Specifically, the control unit 122 sets the priority of the standard pattern P13 to "2." The control unit 122 sets the priority of the standard exhaust pattern P14 to "3." The control unit 122 sets the priority of the rapid exhaust pattern P11 to "4." The control unit 122 sets the priority of the rapid exhaust pattern P12 to "5."

[0103] The process of creating the work schedule S by the control unit 122 will be described below.

[0104] The process of creating the work schedule S is performed in advance (before the user checks out). When the control unit 122 starts the creation process, it receives information necessary to create the work schedule S (time information shown in FIG. 8, information about the user, and the scheduled working hours of the cleaner) from the management system 130. The control unit 122 calculates the maximum number of cleanings for each time period. In addition, the control unit 122 calculates the replacement period (the time from check-out to check-in) for each guest room 10 based on the time information shown in FIG. 8.

[0105] The control unit 122 then allocates cleaning times to each guest room 10 so that the cleaning work is completed within the calculated replacement period. At this time, the control unit 122 allocates cleaning times taking into consideration sterilization of the guest rooms 10. The control unit 122 then allocates an operation pattern with a higher priority and allocates a sterilization time according to that operation pattern. The allocation of cleaning times, sterilization times, and operation patterns will be described below.

[0106] The following explains how to allocate cleaning time. In the following, two hours of cleaning time will be allocated, with some exceptions, taking into consideration the burden on the cleaners. In exceptional cases, one hour of cleaning time will be allocated, which is shorter than two hours (a time that does not place an excessive burden on the cleaners and allows them to complete the cleaning work as planned).

[0107] First, the flow of allocating cleaning time will be explained. The control unit 122 provisionally allocates cleaning time according to the changeover period of the guest rooms 10. The control unit 122 then adjusts the cleaning time based on the maximum number of cleanings so that cleaning is completed within the changeover period. In this way, the control unit 122 completes the allocation of cleaning time. Below, the flow of allocating cleaning tasks will be explained in detail.

[0108] When provisionally allocating cleaning time, the control unit 122 determines whether the turnover period of the guest rooms 10 is six hours or more. If the turnover period of the guest rooms 10 is six hours or more, the control unit 122 provisionally allocates cleaning time so that the guest rooms 10 can be sterilized using the two-step sterilization pattern P25, which has the highest priority. Specifically, the two-step sterilization pattern P25, which has the highest priority, requires 110 minutes for one sterilization. Therefore, when allocating two hours of cleaning time to the time information shown in FIG. 8, the control unit 122 allocates cleaning time two hours after checkout for guest rooms 10 with a turnover period of six hours or more (see Room 201 shown in FIG. 9). This ensures two hours of free time before and after the cleaning time, allowing the cleaning time to be allocated so that the guest rooms 10 can be sterilized using the two-step sterilization pattern P25, which has the highest priority.

[0109] On the other hand, when the turnover period of the guest rooms 10 is less than six hours, the control unit 122 provisionally allocates cleaning time so that the guest rooms 10 can be sterilized using a standard pattern P13 or the like with a second or lower priority. Specifically, when the turnover period is less than six hours, allocating two hours of cleaning time does not ensure two hours of free time before and after the cleaning time, making it unnecessary to execute the double sterilization pattern P25. For this reason, when the turnover period of the guest rooms 10 is less than six hours, the control unit 122 allocates two hours of cleaning time immediately after check-out. In this way, the control unit 122 allocates cleaning time so that the time from the end of the cleaning time to the check-in time is as long as possible and the guest rooms 10 can be sterilized using an operating pattern with a higher priority (standard pattern P13 or the like).

[0110] If a guest room 10 with a three-hour replacement period is assigned two hours of cleaning time, the free time after the cleaning time will be one hour, making it impossible to assign the rapid exhaust pattern P12 (110 minutes), which has the shortest total time among the operation patterns P20, and ultimately making it impossible to assign an operation pattern. Therefore, the control unit 122 assigns one hour of cleaning time (the minimum cleaning time) to the guest room 10 with a three-hour replacement period as an exception, ensuring two hours of free time after the cleaning time. In this way, the control unit 122 provisionally assigns cleaning time so that an operation pattern can be assigned even to a guest room 10 with a three-hour replacement period. If the replacement period is two hours or less, allocating one hour of cleaning time will make it impossible to assign an operation pattern. Therefore, the control unit 122 assigns cleaning time (up to two hours) to the entire replacement period when the replacement period is two hours or less. In this case, the control unit 122 constantly operates the ozone generator 21 at an ozone concentration below the working environment standard.

[0111] After provisionally allocating cleaning times in this manner, the control unit 122 adjusts the cleaning times. Specifically, the control unit 122 compares the number of guest rooms 10 to which cleaning times are allocated with the maximum number of cleanings for each time period, and adjusts the cleaning times if the number of such guest rooms 10 exceeds the maximum number of cleanings. In this case, the control unit 122 determines, based on predetermined criteria, some of the guest rooms 10 for which cleaning times will be adjusted from among the guest rooms 10 to which cleaning times exceed the maximum number of cleanings. The control unit 122 then adjusts the cleaning times so that the cleaning times of the determined guest rooms 10 do not overlap with time periods in which the maximum number of cleanings is exceeded.

[0112] For example, when the number of guest rooms 10 exceeds the maximum number of cleanings, the control unit 122 evaluates the infection risk of the cleaners in the guest rooms 10, and based on the evaluation results (predetermined criteria), shifts the cleaning time of guest rooms 10 with a low infection risk among the guest rooms 10 for which the double sterilization pattern P25 can be performed.

[0113] Specifically, a guest room 10 with a small number of checked-out guests has a lower probability of virus introduction (infection risk) than a guest room 10 with a large number of guests. Furthermore, a guest room 10 checked out by a guest from an area where infectious diseases are not widespread has a lower probability of virus introduction than a guest room 10 checked out by a guest from an area where infectious diseases are widespread. The control unit 122 evaluates the infection risk as described above based on information about the guests, and shifts the cleaning time for guest rooms 10 where the infection risk is low and where double sterilization pattern P25 can be implemented (the replacement period is six hours or more). In this way, as shown in FIG. 9, the control unit 122 maintains a state where double sterilization pattern P25 can be implemented in guest rooms 10 with a high infection risk, while adjusting the cleaning time so that the number of guest rooms 10 does not exceed the maximum number of cleanings (so that cleaning work is completed within the replacement period), thereby completing the cleaning time allocation.

[0114] Next, the allocation of sterilization times and operation patterns will be described. After completing the allocation of cleaning times, the control unit 122 allocates sterilization times and operation patterns to each guest room 10 so that they can be executed during times (free time) other than the cleaning times during the replacement period and so that the operation pattern with the highest priority can be executed. Specifically, if there is free time of two hours or more before and after the sterilization time, the control unit 122 allocates the two-time sterilization pattern P25, which has the highest priority, and allocates two hours of sterilization time before and after the cleaning time. On the other hand, if there is not free time of two hours or more before and after the cleaning time, the control unit 122 allocates an operation pattern with a priority of second or lower according to the free time after the cleaning time, and allocates a sterilization time according to the total time of the operation pattern.

[0115] The control unit 122 allocates cleaning times, sterilization times, etc. in this way and creates a work schedule S shown in Fig. 10. The work schedule S is displayed on a predetermined display device.

[0116] In this way, the control unit 122 sets (assigns) the cleaning time, sterilization time, and operation pattern at a stage prior to check-out, and can present information (work schedule S) that will enable the cleaning and sterilization of each guest room 10 to be completed during the replacement period. This allows the cleaning and sterilization of each guest room 10 to be performed appropriately.

[0117] In addition, the guest room 10 can be sterilized using the optimal operation pattern P20 (the operation pattern that completes sterilization within the sterilization time and has the highest priority) according to the assigned sterilization time.

[0118] As described above, the multiple operating patterns P20 of the second embodiment include a seventh operating pattern (double sterilization pattern P25) in which the first period (inactivation time) and the second period (standby time) are repeated twice with a predetermined period of time between them, and the seventh operating pattern is set to have a higher priority than the other operating patterns (rapid pattern P11, rapid exhaust pattern P12, standard pattern P13, and standard exhaust pattern P14) (Figure 6).

[0119] By configuring in this way, the seventh operation pattern (double sterilization pattern P25) is executed with priority, and it is possible to make it easier for the cleaners to carry out replacement preparation work (cleaning work) in the guest rooms 10 after sterilization.

[0120] Furthermore, the space is each guest room 10 of the hotel 1 (accommodation facility), and the control unit 122 assigns one of the plurality of operating patterns P20 to each guest room 10 based on predetermined allocation information including at least information regarding the priority and information regarding the replacement period of each guest room 10 (time information shown in Figure 8).

[0121] By configuring in this way, it is possible to appropriately assign one operation pattern to each guest room 10 so as to suit the respective replacement period.

[0122] The allocation information also includes information (maximum number of cleanings) regarding the number of guest rooms that can be cleaned by the workers (cleaners) during the replacement period in the same time period.

[0123] By configuring in this way, it is possible to assign one operation pattern P20 to each guest room 10, taking into consideration the replacement preparation work performed by the worker.

[0124] The hotel 1 according to the second embodiment is one embodiment of the accommodation facility according to the present invention.

[0125] Although the second embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0126] For example, the control unit 122 assigns the cleaning time and the like, and then assigns the sterilization time and the operation pattern, but the order in which the cleaning time and the like are assigned is not particularly limited.

[0127] Furthermore, the device that allocates the cleaning time and sterilization time is the control unit 122 in the above embodiment, but is not limited to this, and may be a device other than the control unit 122 (for example, the management system 130, etc.).

[0128] Next, a sterilization system 220 according to a third embodiment will be described with reference to Fig. 11. Note that the arrows shown in Fig. 11(a) schematically show the flow of ozone.

[0129] As shown in Figure 11(a), the unit bathroom area 13 is partitioned off from the bedroom 11 and the hallway 12. Therefore, even if ozone is released from the ozone generator 21 in the bedroom 11, the ozone may not reach the unit bathroom area 13 sufficiently, resulting in uneven ozone concentrations.

[0130] Sterilization system 220 according to the third embodiment differs significantly from sterilization system 20 according to the first embodiment in that it suppresses unevenness in ozone concentration by executing bathroom sterilization pattern P36, which operates bathroom ventilation fan 13a at a higher airflow rate than 24-hour ventilation during the inactivation time (the time when ozone generator 21 is operating). This difference will be explained below.

[0131] First, we will explain bathroom exhaust fan 13a. As mentioned above, bathroom exhaust fan 13a is configured so that the airflow rate can be adjusted in stages (to "24-hour ventilation," "weak," and "strong"). Bathroom exhaust fan 13a can change the airflow rate based on a signal from control unit 222.

[0132] Next, bathroom sterilization pattern P36 shown in Fig. 11(b) will be described. Fig. 11(b) shows the results of simulating bathroom sterilization pattern P36 using Equation 2, which will be described later.

[0133] Bathroom sterilization pattern P36 controls bathroom ventilation fan 13a and other controls so that the CT value in unit bathroom section 13 reaches a target value. When executing bathroom sterilization pattern P36 (11:40 in FIG. 11(b)), control unit 222 operates ozone generator 21 and bathroom ventilation fan 13a at "weak," which has a higher airflow rate than "24-hour ventilation," to draw the ozone released into bedroom 11 into unit bathroom section 13 (see the dashed arrow in FIG. 11(a)). This causes control unit 222 to increase the ozone concentration in unit bathroom section 13 (13:20 in FIG. 11(b)). Control unit 222 continues releasing and drawing ozone for a predetermined time, increasing the ozone concentration in unit bathroom section 13 to a predetermined concentration (approximately 0.7 ppm) (see "inactivation time" in FIG. 11(b)). In this way, the control unit 222 suppresses unevenness in the concentration in the unit bath area 13 and distributes ozone throughout the unit bath area 13.

[0134] Once the ozone concentration in unit bathroom 13 has reached a predetermined level, control unit 222 stops the operation of ozone generator 21. Meanwhile, control unit 222 continues to operate bathroom exhaust fan 13a at "weak" rather than returning the airflow rate to "24-hour ventilation." Thus, control unit 222 continues to operate bathroom exhaust fan 13a at "weak" throughout the inactivation and neutralization periods, continuing to draw ozone into unit bathroom 13. Once control unit 222 has reduced the ozone concentration in bedroom 11 and unit bathroom 13 to below the completion ozone concentration (2:30 PM in Figure 11(b)), bathroom sterilization pattern P36 ends.

[0135] In bathroom sterilization pattern P36, the inactivation time and standby time are set in advance so that the CT value in the unit bath area 13 reaches the target value and the ozone concentration in the bedroom 11 and unit bath area 13 is equal to or lower than the ozone concentration at completion. Specifically, the inactivation time, etc. are set by simulating bathroom sterilization pattern P36 using the following formula 2.

number

[0136] In the above formula 2, C'2 is the ozone concentration [ppm] of the unit bathroom section 13. C2 is the initial ozone concentration [ppm] of the unit bathroom section 13. R2 is the air volume [m 3 ]. C1 is the ozone concentration in bedroom 11 [ppm]. R1 is the air volume of bedroom 11 [m 3 The other variables (air change rate n, time step t, and half-life T) are the same as in Equation 1 above.

[0137] When simulating bathroom sterilization pattern P36 using Equation 2, the ventilation rate n is substituted with the ventilation rate when the airflow rate of bathroom ventilation fan 13a is set to "weak." Furthermore, the half-life T is substituted with the half-life of ozone in unit bathroom section 13.

[0138] In the above formula 2, the amount of ozone in unit bathroom section 13 that will increase due to the operation of bathroom exhaust fan 13a (drawing in ozone) is calculated as "(C1-C2)*nR1t," and this is added to the amount of ozone already present in unit bathroom section 13 (C2*R2). The result of this calculation is then divided by the air volume R2 of unit bathroom section 13 to determine the ozone concentration in unit bathroom section 13 when ozone is released while bathroom exhaust fan 13a is operating at a "weak" airflow rate. The calculated ozone concentration does not take into account the impact of natural ozone depletion.

[0139] Therefore, in the above formula 2, "(1 / 2) t / T The ozone concentration in the unit bathroom section 13 taking into consideration the influence of natural attenuation is calculated by multiplying the calculated result of the ozone concentration by ".

[0140] Figure 11(b) shows the results of a simulation of bathroom sterilization pattern P36 using Equation 2 to determine the inactivation time and standby time. In Figure 11(b), ozone generator 21 and bathroom ventilation fan 13a (airflow "weak") were started at 11:40, and the ozone concentration in unit bath section 13 rose to approximately 0.7 ppm (higher than the second target concentration (0.5 ppm)) by 1:20 PM (see "Inactivation Time"). Also, in Figure 11(b), operation of ozone generator 21 was stopped at this timing, and the ozone concentration fell to or below the completion ozone concentration (0.05 ppm) by 2:30 PM (see "Standby Time"). In Figure 11(b), the area of ​​the dashed line graph (CT value) from 11:40 AM to 2:30 PM exceeds the target value.

[0141] By executing bathroom sterilization pattern P36, the control unit 222 can make the CT value in the unit bath area 13 reach the target value and properly sterilize the unit bath area 13. Furthermore, one ozone generator 21 can efficiently sterilize unit bath areas 13 where no other ozone generator 21 is installed.

[0142] As described above, the space in the third embodiment is a guest room 10 of a hotel 1 (accommodation facility), the bathroom ventilation fan 13a (ventilation fan) is provided in the unit bath section 13 within the guest room 10, the ozone generator 21 is provided so as to be able to release the sterilizing component into a space (bedroom 11) different from the unit bath section 13 within the guest room 10, and the third operating pattern includes a sixth operating pattern (bathroom sterilization pattern P36) in which the bathroom ventilation fan 13a is operated at the first air volume for the first period (inactivation time) and the second period (standby time).

[0143] With this configuration, ozone can be drawn into the unit bath section 13 from another space (bedroom 11), and the sterilizing component can be quickly distributed throughout the entire guest room 10.

[0144] Although the third embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0145] For example, in bathroom sterilization pattern P36, ozone generator 21 and bathroom exhaust fan 13a are operated at the same time during the inactivation period, but the operation timings of ozone generator 21 and bathroom exhaust fan 13a may be different. For example, bathroom exhaust fan 13a may be operated later than ozone generator 21 to change its airflow rate. This allows ozone to be efficiently drawn into unit bathroom 13 from bedroom 11, where the ozone concentration has become high.

[0146] In addition, in bathroom sterilization pattern P36, bathroom exhaust fan 13a is operated at a "weak" airflow rate, but the airflow rate of bathroom exhaust fan 13a can be changed as needed. For example, the airflow rate of bathroom exhaust fan 13a can be changed from "weak" to "strong" after the CT value reaches a target value. This shortens the standby time.

[0147] Furthermore, the control of operating bathroom exhaust fan 13a during the inactivation time is not limited to bathroom sterilization pattern P36 shown in Figure 11. For example, control unit 222 may operate bathroom exhaust fan 13a during the inactivation time while maintaining the ozone concentration in unit bath area 13 at a second target concentration (0.5 ppm). This allows unit bath area 13 to be sterilized at an ozone concentration that has little effect on the human body.

[0148] Furthermore, control unit 222 may set a plurality of operation patterns for operating bathroom ventilation fan 13a during the inactivation time, and set priorities for these operation patterns. [Explanation of symbols]

[0149] 1 Hotel (building) 10 Guest rooms (spaces used by rotating users) 13a Bathroom ventilation fan (disinfection method) 20 Sterilization System 21 Ozone generator (sterilization means) P10 Driving pattern

Claims

1. A sterilization system that sterilizes a space during a period when users change spaces in a building, A sterilization means for sterilizing the space, the sterilization means including a sterilization device capable of releasing a gaseous sterilizing component into the space; A control means for determining one of a plurality of preset operation patterns of the sterilization means in accordance with a priority based on a predetermined criterion so that sterilization of the space is completed within the remaining period until the end of the replacement period; Equipped with The determined driving pattern includes: a first period during which the sterilization component is released into the space by operation of the sterilization device; a second period in which the sterilization component released during the first period is discharged or inactivated from the space due to the stop of operation of the sterilization device; the operation timing of the sterilization device is set so that is included in the remaining period, The plurality of driving patterns include: During the first period, a first operating pattern in which a target component concentration in the space due to the sterilization component is set to a first concentration based on a predetermined environmental standard; a second operation pattern in which the target component concentration is set to a second concentration higher than the first concentration, The first driving pattern is set to have a higher priority than the second driving pattern. Disinfection system.

2. The sterilization means includes a ventilation fan that promotes the discharge of the sterilization component released into the space, The plurality of driving patterns include: During at least one of the first period and the second period, a third operation pattern in which the ventilation fan is operated at a first airflow rate; a fourth operation pattern in which the ventilation fan is operated at a second air volume that is smaller than the first air volume; The fourth driving pattern is set to have a higher priority than the third driving pattern. The sterilization system according to claim 1.

3. The space is a guest room of an accommodation facility, The ventilation fan is provided in a unit bath area in the guest room, The sterilization device is provided so as to be able to release the sterilizing component in a space different from the unit bath area in the guest room, The third driving pattern includes: a sixth operation pattern in which the ventilation fan is operated at the first airflow rate over the first period and the second period; The sterilization system according to claim 2 .

4. The plurality of driving patterns include: a seventh operation pattern in which the first period and the second period are repeated twice with a predetermined period between them; The seventh driving pattern is set to have a higher priority than the other driving patterns. The sterilization system according to any one of claims 1 to 3.

5. The space is a guest room of an accommodation facility, The control means assigning one of the plurality of operation patterns to each of the guest rooms based on predetermined assignment information including at least information regarding the priority order and information regarding the replacement period of each of the guest rooms; The sterilization system according to any one of claims 1 to 4.

6. The allocation information includes: The information includes information about the number of guest rooms for which the workers can carry out the replacement preparation work during the replacement period in the same time period. The sterilization system according to claim 5.

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