Environmental conservation method in a facility space

Abstract

To develop a novel method for preserving the environment in a facility space which can disinfect or sterilize an indoor space using ozone with practical objectivity.SOLUTION: The present invention discloses a method for disinfecting or sterilizing bacteria and viruses in a space by filling ozone gas G in the space by regarding an appropriate space blocked from the outside as a treatment target space R. The method includes: a work machine arrangement determining step for determining the arrangement of work machines such as an ozone generator 1 for emitting the ozone gas G or a diffuser 2 for diffusing it; a work machine arranging step; a treating step; and an ozone recovery step. The ozone generator 1 is disposed at a corner of the treatment target space R and sprays the ozone gas G from there to the center of the space. Preferably, a blower 21 serving as the diffuser 2 is disposed to face the ozone generator 1 and blows air upward so as to face the ozone gas G sprayed from the ozone generator 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an environmental conservation method in a facility space such as a commercial facility, an office, a public facility, or even a general household, and more particularly to a novel environmental conservation method for inactivating, for example, COVID-19, the so-called novel coronavirus.

Background Art

[0002] In order to prevent the infection of the novel coronavirus, thorough disinfection and sterilization work is being carried out at offices, restaurants, etc. where people come and go. For this type of disinfection and sterilization work, in many cases, methods such as wiping or spraying with an alcohol solution or a hypochlorous acid solution are often used on indoor furnishings such as desks and chairs that people directly touch. In addition, in order to make the entire indoor space a sterilized environment, disinfection and sterilization are also carried out with ozone (see, for example, Patent Documents 1 to 6). However, generally speaking, the actual situation is that it only stays at the method of installing an ozone generator in a sealed room and operating the ozone generator for a certain period of time. Therefore, the verification of the effect by ozone generation has not been sufficiently carried out, and the current situation is that it is not possible to confirm to what extent the environmental conservation of the indoor space has been achieved.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention has been made in consideration of such a background, and has as its technical problem the development of a novel environmental conservation method in a facility space that can surely remove and sterilize a room space or the like with specificity and objectivity by ozone.

Means for Solving the Problems

[0005] That is, the environmental conservation method in a facility space according to claim 1 is a method of removing and sterilizing bacteria and viruses in a space by using an appropriate space blocked from the outside as a space to be treated and filling the space with ozone gas, this method includes an equipment layout planning work process, an equipment layout work process, a treatment work process, and an ozone recovery work process, first, in the equipment layout planning work process, considering the volume of the space to be treated and the equipment status in the space, determine the required output of each working equipment including an ozone generator, a diffusion device, and a deodorizer to be installed in the space, the required number of units based on this, and their arrangement positions and treatment outputs in the space, next, in the equipment layout work process, install each working equipment in the space to be treated according to the determination in the equipment layout planning work process, next, in the treatment work process, output the treatment output determined in the equipment layout planning work process to the ozone generator and the diffusion device for the required time in the space to be treated with an unmanned environment, and remove and sterilize at least viruses in the space to be treated, thereafter, in the ozone recovery work process, while maintaining the unmanned environment of the space to be treated, operate the deodorizer to recover ozone gas which is Furthermore, a blower is applied to the diffusion device , and the ozone generator is installed at a corner of the space to be treated, and is provided so as to spray ozone gas from here toward the center of the space. In addition, the blower, which is the diffusion device, is installed so as to face the ozone generator. push the ozone gas to the upper rear of the ozone generator, The blower blows air upward against the ozone gas sprayed from the ozone generator. and is characterized in being made in this way.

[0006] The environmental conservation method in the facility space according to claim 2, in addition to the requirements described in claim 1, is such that the CT value, which is the product of the ozone concentration (ppm) of the ozone gas output from the ozone generator in the processing target space and the output time (minutes) of the ozone gas, is set to be 307 or more. Above It is characterized in that it is configured as such.

[0007] The environmental conservation method in the facility space according to claim 3, in addition to the requirements described in claim 1 or 2, is provided with an ozone concentration detection device in the processing target space, and in the processing operation step and the ozone recovery operation step, data on the ozone concentration is collected and made visible and displayable from a recording medium. It is characterized in that it is configured as such.

[0008] The environmental conservation method in the facility space according to claim 4, in addition to the requirements described in any one of claims 1 to 3, the work in each operation step is carried out by a worker who has received training from a public or private technical certification institution while wearing protective clothing. It is characterized in that it is configured as such.

[0009] Also, the environmental conservation method in the facility space according to claim 5 described, in addition to the requirements described in any one of claims 1 to 4 is such that, the deodorizer is provided independently separately from other work equipment and is arranged at the central part of the processing target space. It is characterized in that it is configured as such. And, with the configurations described in each of these claims as means, the above problems are solved.

Effects of the Invention

[0010] First, according to the invention described in claim 1, ozone gas is sprayed and filled in the space to be treated to sterilize and disinfect viruses in the space to be treated, so that sterilization and disinfection work can be performed effectively and odors in the space to be treated can also be decomposed at their source. In other words, since ozone gas has an extremely strong ability to oxidize substances, this strong oxidizing power can be used to sterilize and disinfect viruses and sufficiently decompose odors. The sterilization and disinfection method using ozone gas by the applicant (the present invention) has been verified for its inactivation effect against the new coronavirus (SARS-CoV-2) by a third-party organization, specifically, the Nara Medical University School of Medicine (Department of Microbiology and Infectious Diseases) and the MBT Consortium, and has objective effectiveness, so that clients can fully trust the sterilization and disinfection effect. Moreover, according to the present invention, since the ozone generator and the diffusion device (blower) are installed facing each other in a confronting state, the ozone gas can be more uniformly filled in the space to be treated, and the space to be treated can be sterilized without unevenness. That is, conventionally, a blower was often arranged in front of the ozone generator (on the front side of the ozone gas spray port). In this case, for example, it was difficult for the ozone gas to reach the rear part of the ozone generator, more specifically, the corner part in the upper rear part of the ozone generator, and it took a long time to fill the ozone gas to every corner of the space to be treated. However, in the present invention, since the ozone generator and the diffusion device (blower) are arranged to face each other, the ozone gas can surely reach the corner part in the upper rear part of the ozone generator in a short time, and a uniform disinfection and sterilization treatment without unevenness can be performed over every corner of the space to be treated.

[0011] According to the invention described in claim 2, the CT value is 307 or less. Above The ozone concentration (ppm) and the operating time (minutes) of the ozone generator, which is the output time of ozone gas, are set so that 99% to 99.9% of the new coronavirus can be sterilized, and the virus in the target space can be inactivated in a relatively short time. Specifically, in an office or other unmanned environment after work, the actual work can be completed in a total of six hours, consisting of about two hours for ozone spraying and maintaining the concentration, and about four hours for subsequent deodorization (concentration reduction). In other words, the sterilization and decontamination work can be completed by the start of work the next day, so that the client's main business (work) is not affected.

[0012] According to the invention described in claim 3, in the substantial working steps, namely the processing working step of filling the treatment target space with ozone gas and the ozone recovery working step of reducing the ozone concentration after this step, data on the ozone concentration is measured by an ozone concentration detection device, and in order to be able to visually display this data, a reliable disinfection and sterilization operation supported by the actually measured data can be carried out, making the reliability of the operation more certain. Also, both the requester and the operator can more objectively verify and confirm the disinfection and sterilization effect. For example, the virus inactivation effect can be grasped as more certain. That is, since ozone gas is invisible, for example, even if it is spray-treated at a predetermined concentration and for a predetermined time, there is still a part where the disinfection and sterilization effect cannot be fully felt by the requester as a practical feeling or a sense of security. In this regard, in the present invention, in order to measure the ozone concentration during the processing operation and make it visually displayable, for example, even after the actual operation, by comparing and verifying the measured concentration data with the theoretical value, more specifically, by confirming that the measured concentration data is almost the same as the theoretical value and meets the reference value, it is possible to objectively verify that the disinfection and sterilization operation has been carried out reliably and accurately.

[0013] According to the invention described in claim 4, each working step when performing disinfection and sterilization is carried out by a trained operator while wearing protective clothing, so it is possible to strictly prevent the operator from bringing in and taking out viruses, and minimize the infection risk of the operator. Also, because such safety management is thorough, the requester can more clearly recognize that it is a higher-quality disinfection and sterilization operation.

[0014] Also, according to claim 5According to the described invention, ozone gas remaining in the processing target space during the ozone recovery operation process can be recovered in a short time, and the ozone gas concentration in the processing target space can be reduced to a low concentration in a short time. Therefore, during the disinfection and sterilization treatment, it can be maintained in a closed state, and the state where the processing target space cannot be used can be suppressed in a shorter time. Specifically, for example, when a space where daily operations are carried out, such as an office or a store, is used as the processing target space, the disinfection and sterilization work can be completed using the non-operating time period from after work until the start of work the next day, and the disinfection and sterilization work can be carried out with almost no hindrance to business or sales.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0016] The environmental protection method in the facility space of the present invention (hereinafter, the system for realizing this method is referred to as "environmental protection system S") is as shown in the following examples, but appropriate changes can also be made within the scope of the technical idea of the present invention for these examples.

Examples

[0017] As an example, as shown in FIGS. 1 to 3, the environmental protection system S according to the present invention uses a space that is blocked from the outside, such as an office, that is, a closed space, as a processing target space R, and sprays and fills ozone gas G in this processing target space R to remove and sterilize not only the air in the space but also the wall surfaces, floor surfaces, and various facilities E installed in the space, such as lockers and desks. One of the characteristics is that the ozone gas G can be efficiently distributed to every corner of the processing target space R in a short time. In addition, the disinfection and sterilization method using ozone gas according to the present invention has been verified for its inactivating effect against the novel coronavirus (SARS-CoV-2) by a third-party institution, specifically, the Department of Medicine, Nara Medical University (Lectures on Microbial Infectious Diseases) and the MBT Consortium. Therefore, the environmental protection system S has sufficient objective effectiveness in the disinfection and sterilization effect, and the disinfection and sterilization work and its effect can be fully trusted by the requester who requested the disinfection and sterilization work.

[0018] Conversely, since ozone gas itself is invisible to the human eye, for example, even if an operator sprays ozone gas at a specified concentration for a specified time, it is difficult for the requester to feel the work and its effect, and it is difficult to lead to the requester's sense of security and fulfillment. In this regard, in the present invention, as described above, since the disinfection and sterilization effect can be demonstrated and verified by a third-party institution, it leads to a great sense of security for the requester. Also, when the requester is the operator of the store where the disinfection and sterilization work is performed, such verified disinfection and sterilization work can be greatly appealed to society as a store that actively implements virus infection prevention measures and as a clean store inside, which also contributes to the customer attraction effect. In other words, such verified disinfection and sterilization work has the effect that customers who come to the store can use the store with confidence.

[0019] And the environmental protection system S includes an equipment layout planning work process, an equipment layout work process, a processing work process, and an ozone recovery work process, and each work process will be described below. First, the equipment layout planning work process will be described. In the equipment layout determination operation process, considering the volume of the processing target space R, the equipment status provided in the space, etc., during the operation, the required output of each working equipment including the ozone generator 1, diffusion device 2, and deodorizer 3 to be installed in the space, the required number based on this, and their arrangement positions and processing outputs in the space are determined. Note that in this equipment layout determination operation process, it may be possible to actually measure the size of the processing target space R and the size of the equipment E. Hereinafter, the preferred arrangement modes of each working equipment will be described based on FIGS. 1 to 3.

[0020] First, the ozone generator 1 will be described. The ozone generator 1 fills the ozone gas G in the processing target space R by spraying the ozone gas G in the sealed processing target space R. In this embodiment, as an example, as shown in FIG. 1, a total of four units are arranged one by one at the corners of the processing target space R. These ozone generators 1 are placed with the ozone gas spray ports 11 facing the central part of the space, for example, as shown in FIGS. 1 and 3, and are installed to spray the ozone gas G toward the central part of the processing target space R. Here, since the processing target space R shown in FIG. 1 is rectangular in plan view, the ozone generators 1 are provided at the four corners. However, in the processing target space R that is not rectangular in plan view, it is not always necessary to provide the ozone generators 1 at all corners. Of course, the arrangement location and number of the ozone generators 1 can be appropriately changed according to the size and volume of the processing target space R.

[0021] Also, in this embodiment, for example, as shown in FIG. 3 above, the ozone generator 1 is placed on the equipment E such as a counter provided in the processing target space R. This is to minimize the difference between the distance from the ozone generator 1 to the ceiling surface and the distance from the ozone generator 1 to the floor surface, so as to fill the ozone gas G in the processing target space R more uniformly and in a shorter time. Therefore, if the equipment E such as a counter is not originally in the processing target space R, it is preferable to prepare a mounting table having an appropriate height and install the ozone generator 1 on this mounting table. In each drawing, the ozone gas G is indicated by a solid arrow, and the blowing air A by the diffusion device 2 (the blower 21) described later is indicated by a normal arrow (hollow arrow). Also, the broken-line arrow (with hatching) shown in a semi-elliptical shape so as to go around the ozone generator 1 indicates the state where the ozone gas G sprayed from the ozone generator 1 wraps around to the rear side of the ozone generator 1 and reaches the upper corner portions as time passes (see Fig. 3).

[0022] Next, the diffusion device 2 and its preferable arrangement will be described. The diffusion device 2 uniformly diffuses the ozone gas G sprayed from the ozone generator 1 to every corner in the processing target space R in a short time, and a blower 21 such as a circulator or a fan is applied. Here, in this embodiment, as an example of the blower 21, as shown in Fig. 1 above, an ozone facing blower 21A (here, four units) provided facing the ozone generator 1, a space central blower 21B (here, one unit) provided at the central portion of the processing target space R, and a space edge blower 21C (here, a pair of two units) provided near both longitudinal ends of the processing target space R are provided. Note that as the space edge blower 21C, an industrial blower with a large blowing output can be applied.

[0023] Among the above three types of blowers 21, the ozone-facing blower 21A is provided to drive the ozone gas G sprayed from the ozone generator 1 to the rear side of the ozone generator 1 (the corner of the processing target space R). Specifically, as an example, as shown in FIG. 3 above, it is provided to blow air slightly upward toward (opposite to) the ozone gas spray port 11 of the ozone generator 1. Of course, the blowing direction of the ozone-facing blower 21A is preferably set to be changeable as appropriate by a so-called swinging function, so that the ozone gas G sprayed from the ozone generator 1 can be efficiently distributed to all parts within the processing target space R. Note that the blown air A whose wind direction is changed by this swinging function is indicated by a dashed arrow drawn so as not to go from the ozone-facing blower 21A toward the ozone generator 1. Also, the dashed arrows drawn so as to be discharged from the central space blower 21B and the edge space blower 21C similarly indicate the blown air A whose wind direction is changed. Of course, the central space blower 21B installed in the central part of the processing target space R preferably has a swinging function that can switch the wind direction 360 degrees, which is the meaning of the blown air A drawn radially from the central space blower 21B in all directions on the drawing.

[0024] Thus, in this embodiment, three types of blowers are provided as the blower 21 to evenly distribute the ozone gas G to every corner of the processing target space R in a short time. However, depending on the processing environment such as the size and volume of the processing target space R, for example, it is also possible to apply a low-output edge space blower 21C, or to omit one or both of the two edge space blowers 21C.

[0025] Incidentally, as for the conventional ozone diffusion form, that is, the arrangement form of the blower 21, as shown in FIG. 4 as an example, even if the ozone generator 1' is installed at the four corners of the processing target space R, for example, the blower 21' is often arranged on the front side of this ozone generator 1' (the front side of the ozone gas spray port 11'). However, in this case, for example, on the rear side of the ozone generator 1', more specifically, it is difficult for the ozone gas G to spread over the upper side of the corners such as the ceiling and wall surfaces on the rear side of the ozone generator 1', and it took a long time to fill the ozone gas G to every corner of the processing target space R. In this regard, in the present invention, as described above, since the ozone counter-flow blower 21A as the diffusion device 2 is arranged so as to face the ozone generator 1, the ozone gas G can be surely spread over the upper side of the rear corner of the ozone generator 1 in a short time, and a uniform deodorization and sterilization treatment without unevenness can be performed over every corner in the processing target space R (see FIG. 3).

[0026] Next, the deodorizer 3 and its preferable arrangement will be described. The substantial deodorization and sterilization treatment is performed by maintaining a predetermined ozone concentration in this space for an appropriate time while maintaining the unmanned environment of the processing target space R. The deodorizer 3 is responsible for collecting the ozone gas G filled in the processing target space R and reducing the ozone concentration to at least a level where an operator can enter. Here, the deodorizer 3 in this embodiment is provided as one unit in the central part of the processing target space R, as shown in FIG. 1 above, in the same manner as the central space blower 21B. Note that the deodorizer 3 is provided separately from other working equipment, such as the ozone generator 1, etc., and thus the high-concentration ozone gas G remaining in the treatment target space R can be recovered in a short time. Therefore, the state of the treatment target space R that cannot be actually used because the disinfection and sterilization treatment is in progress can be suppressed in an even shorter time. Specifically, for example, when a space for daily work, such as an office or a store, is used as the treatment target space R, a series of disinfection and sterilization operations including equipment placement to recovery work can be completed using the non-operating time period from after work to the start of work the next day, and it hardly causes any hindrance to the original business or operation.

[0027] Also, it is preferable to provide an ozone concentration detection device (not shown) in the treatment target space R, which measures the ozone concentration in the treatment target space R from the spraying operation of the ozone gas G to the completion of the recovery operation. Note that the measured ozone concentration data is stored in an appropriate recording medium such as a personal computer, etc., and is confirmed after the ozone recovery operation (a kind of visual display). Thereby, it can be confirmed that the disinfection and sterilization operation has been reliably performed based on the actually measured ozone concentration data, and the reliability of the disinfection and sterilization operation is further improved. That is, by confirming that the actually measured concentration data is almost the same as the theoretical value and that the ozone concentration data also satisfies the reference value in actual measurement, it is possible to objectively verify that the disinfection and sterilization operation has been surely and accurately performed. Also, thereby, the client can have an even stronger sense of trust and security in the disinfection and sterilization operation according to the present invention. Note that the measured concentration data can be accumulated each time the disinfection and sterilization treatment is repeated, and thereby treatment conditions corresponding to various treatment environments can be constructed, and the accuracy (theoretical accuracy) of the disinfection and sterilization treatment operation itself can also be improved.

[0028] In addition, the measured data obtained by the ozone concentration meter can be monitored by an operator in a separate room, for example, during the spraying to recovery of ozone gas G. However, since it actually takes about 6 hours from spraying to recovery, it is difficult for the operator to continuously monitor. Therefore, as described above, in practice, it is considered realistic to continuously store the measured ozone concentration in a recording medium such as a personal computer, and for the operator to check this after the substantial processing work and compare it with the theoretical value. Note that the "visible display" described in the claims includes not only monitoring the measured ozone concentration in real time, but also visually checking it later after the substantial processing work as described above. Incidentally, it is preferable that the ozone concentration meter provided in the processing target space R is provided at a plurality of locations within the space to measure the ozone concentrations at various sites.

[0029] The arrangements described above are preferred arrangements of various work equipment. However, in practice, an arrangement like that in FIG. 1 above is hardly achievable. As an example, as shown in FIG. 2, in the case of an office or the like, for example, equipment E such as lockers, bookshelves (sorting shelves), or counters is often installed along the wall. Therefore, it is almost impossible to install the ozone generator 1 at the corners (four corners) of the room. Also, as shown in FIG. 2, for example, sliding doors are often provided on the wall surface. In that case, various work equipment cannot be installed in the opening and closing space. Therefore, in practice, as shown in FIG. 2 as an example, the ozone generator 1 is displaced and arranged at a position avoiding equipment E such as lockers, bookshelves, and sliding doors. Also, along with this displacement amount, it is realistic to displace the arrangement of the central space blower 21B and the deodorizer 3 by some amount. However, the ozone generator 1 is installed at the corner of the processing target space R, more specifically, at the corner formed to be surrounded by the locker and the wall surface, and is provided to spray ozone gas G from here toward the central part of the space. Also, the ozone counter blower 21A as the diffusion device 2 is installed to face the ozone generator 1, and air is blown slightly upward toward the ozone gas spray port 11 of the ozone generator 1.

[0030] Next, the equipment layout work process will be described. The equipment layout work process is a process of installing each work equipment within the processing target space R in accordance with the determination in the equipment layout determination work process. Here, starting from this equipment layout work process, at least when workers actually enter the processing target space R to work, it is preferable that workers who have received training at a public or private technical certification institution work while wearing protective clothing. This can strictly prevent the virus from being brought in or taken out by workers, and minimize the infection risk of workers. Also, because such strict safety management is implemented, the client can more clearly recognize that it is a higher-quality disinfection and sterilization work.

[0031] Next, the processing work process will be described. The processing work process is a process of outputting the required processing output for the required time by the ozone generator 1 and the diffusion device 2 (blower 21) in the processing target space R with an unmanned environment, and removing and sterilizing at least the virus in the processing target space R. Here, the preferable processing conditions for inactivating the novel coronavirus in the processing target space R will be described. Specifically, regarding the ozone concentration (ppm) of the ozone gas G output from the ozone generator 1 and the output time of the ozone gas G, that is, the operation time (minutes) of the ozone generator 1, the CT value, which is the multiplication value (product) of the ozone concentration (ppm) and the operation time (minutes), is set to 307 or more, more preferably 620 or more (see formula (A)). · Ozone concentration (ppm) × Operation time (minutes) = CT value …(A)

[0032] First, the calculation formula for the ozone concentration is shown as formula (B). · Ozone generation amount ÷ Volume of the processing target space (m 3 ) ÷ 2.14 ÷ 3 = Ozone concentration (ppm) …(B) Here, the "ozone generation amount" in formula (B) is the generation amount per unit time (mg / h). Next, the preferable CT value based on the experimental results, strictly speaking, the preferable operation time (the operation time of ozone generator 1) is calculated by formula (C). · CT value ÷ ozone concentration (ppm) = operation time (minutes) …(C)

[0033] 〔Example 1〕 When using ozone generator 1 with an ozone generation amount of 800 mg / h to disinfect 99% of the novel coronavirus, the CT value is 307, and the operation time is calculated from this value. Here, assuming that the area of the treatment target space R is 50 m 2 · and the height is 2.5 m, the volume of the treatment target space R is 125 m 3 and this is the case. Therefore, the ozone concentration (ppm) is calculated as in formula (D). · 800 mg / h ÷ 125 ÷ 2.14 ÷ 3 = 0.996 ppm …(D) Therefore, the operation time is calculated as in formula (E). · CT 307 ÷ 0.996 ppm = 308 minutes (about 5 h) …(E) Here, in the above description, the CT value for disinfecting 99% of the novel coronavirus is described as 307, but this may vary somewhat depending on the treatment environment such as the volume of the treatment target space R, for example.

[0034] 〔Example 2〕 When using ozone generator 1 with an ozone generation amount of 800 mg / h to disinfect 99.9% of the novel coronavirus, the CT value is 620, and the operation time is calculated from this value. Here, the volume of the treatment target space R is assumed to be 125 m 3 as above. Therefore, the ozone concentration (ppm) is also 0.996 ppm as above. Therefore, the operation time is calculated as in formula (F). · CT 620 ÷ 0.996 ppm = 622 minutes (about 10.5 h) …(F) Here, in the above description, the CT value when sterilizing 99.9% of the novel coronavirus was described as 620, but this may vary somewhat depending on the treatment environment such as the volume of the treatment target space R, for example.

[0035] From these results, it was calculated that operating the ozone generator 1 with an ozone generation amount of 800 mg / h for about 5 hours can inactivate 99% of the novel coronavirus, and operating the ozone generator 1 for about 10.5 hours can inactivate 99.9% of the novel coronavirus. Also, from these results, in the case of the treatment target space R (office) of the above volume, if a substantial disinfection and sterilization treatment is started at the timing of the unmanned environment after work and the ozone gas G is recovered before work the next morning, for example, if it starts at 21:00 and is recovered at 8:00 the next morning, the novel coronavirus can be inactivated and the disinfection and sterilization work can be carried out without interfering with office work. During the treatment work process, as described above, the ozone concentration in the treatment target space R is measured by an ozone concentration meter, and it is preferable to measure this at a plurality of locations in the treatment target space R.

[0036] Next, the ozone recovery work process will be described. The ozone recovery work process is a process of operating the deodorizer 3 to recover the ozone gas G that fills and remains in the space while maintaining the unmanned environment of the treatment target space R, and reducing the ozone concentration in the space. Here, this ozone recovery work process reduces the ozone concentration to such an extent that at least the operator can enter the treatment target space R. In addition, in this embodiment, only the deodorizer 3 is provided and the ozone recovery work process is described, but in addition to such a deodorizer 3, it is also possible to install an air purifier together. Note that the disinfection and sterilization work with the ozone gas G is Wipe more effective when carried out after wiping up with alcohol.

[0037] 〔Other Embodiments〕 The present invention is based on the above-described embodiment as a basic technical idea, but further modifications as follows are conceivable. First, in the above-described basic embodiment, the closable space that can be cut off from the external space by closing the door, such as an office, which is the space to be treated in the disinfection and sterilization operation, is set as the treatment target space R. However, the present invention is not necessarily limited to such a closable space having a door. That is, for example, a space that usually cannot be closed, such as a staircase or a balcony, because there is no door, can also be set as the treatment target space R. However, in that case, it is necessary to cover the treatment target space R with a sheet, a curtain, a board, or the like, that is, to form a closed space that is cut off (partitioned) from the outside, and to ensure the closability that can maintain the ozone gas G in the treatment target space R for a predetermined time and at a predetermined concentration.

Explanation of Signs

[0038] S Environmental protection system 1 Ozone generator 2 Diffusion device 3 Deodorizer 11 Ozone gas spray port 21 Blower 21A Ozone counter-flow blower 21B Space central part blower 21C Space edge part blower A Blowing air (air of the blower) E Equipment G Ozone gas R Treatment target space

Claims

1. A method for eliminating and reducing bacteria and viruses in a space by using an appropriately sealed space as a space to be treated and filling the space with ozone gas, comprising: This method includes an equipment layout planning process, an equipment layout process, a treatment process, and an ozone recovery process. First, in the equipment layout planning process, considering the volume of the space to be treated and the equipment situation in the space, determine the required output of each working equipment including an ozone generator, a diffuser, and a deodorizer installed in the space, the required number of units based on the output, their installation positions in the space, and the treatment output. Next, in the equipment layout process, install each working equipment in the space to be treated according to the determination in the equipment layout planning process. Next, in the treatment process, output the treatment output determined in the equipment layout planning process for the required time by the ozone generator and the diffuser in the unmanned space to be treated, and eliminate and reduce at least viruses in the space to be treated. After that, in the ozone recovery process, while maintaining the unmanned environment in the space to be treated, operate the deodorizer to recover ozone gas. Furthermore, a blower is applied to the diffuser. In addition, the ozone generator is installed at a corner of the space to be treated and is provided to spray ozone gas from here toward the central part of the space. In addition, the blower as the diffuser is installed so as to face the ozone generator, and the air blowing of the blower is performed upward against the ozone gas sprayed from the ozone generator so as to drive the ozone gas to the upper rear of the ozone generator. A method for environmental protection in a facility space, characterized by the above.

2. The CT value, which is the product of the ozone concentration (ppm) of the ozone gas output from the ozone generator in the space to be treated and the output time (minutes) of the ozone gas, is set to 307 or more. The method for environmental protection in a facility space according to Claim 1, characterized by the above.

3. An ozone concentration detection device is provided in the space to be treated. In the treatment process and the ozone recovery process, data on the ozone concentration is collected and can be visually displayed from a recording medium. The method for environmental protection in a facility space according to Claim 1 or 2, characterized by the above.

4. The environmental conservation method in the facility space according to any one of claims 1 to 3, characterized in that the work in each of the above work processes is carried out by a worker who has received training from a public or private technical certification institution while wearing protective clothing.

5. The environmental conservation method in the facility space according to any one of claims 1 to 4, characterized in that the deodorizer is provided independently separately from other work equipment and is arranged at the central part of the space to be treated.

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