Bathroom sterilization and cleaning system

Abstract

To provide a bathroom sterilization cleaning system which can efficiently and appropriately perform sterilization cleaning of a bathroom utilizing ozone water while preventing excessive increase in ozone gas concentration in the bathroom.SOLUTION: A bathroom sterilization cleaning system SY includes a blower 30 enabling blowing to a bathroom 1, a ventilation device 32 which can exhaust air in the bathroom to outside and ventilate the bathroom 1, and an ozone water spray device 4 capable of performing ozone water spray operation to the bathroom 1 so as to perform sterilization cleaning treatment of the bathroom 1, wherein when the sterilization cleaning treatment is performed on the bathroom 1, the ozone water spray operation to the bathroom 1 is executed while being divided into a plurality of times with an interval period Pb interposed therebetween, during each of the periods of the plurality of ozone water spray operations, blowing and ventilation are stopped, and on the other hand, during the interval period Pb, the blowing and the ventilation are executed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bathroom sterilization and cleaning system that uses ozone water. [Background technology]

[0002] A specific example of a bathroom sterilization and cleaning system is one that includes an ozone water spraying device that can spray ozone water into a bathroom, as described in Patent Document 1, for example. Ozone water has a sterilizing effect. Therefore, according to the above configuration, various parts of the bathroom, such as walls, can be sterilized by spraying ozone water, thereby suppressing the growth of mold and bacteria. Ozone water spray can also be used to remove dirt. Patent documents 2 and 3 describe air conditioning devices that spray ozone gas into a bathroom. In comparison, the configuration described in patent document 1, i.e., the configuration of spraying liquid ozone water, not only provides a cleaning effect by washing away dirt in the bathroom with the ozone water, but also makes it possible to more effectively bring the ozone in the ozone water into contact with various parts of the bathroom, thereby achieving an excellent sterilizing effect. Ozone water is ozone gas dissolved in water, and in the water it generates OH radicals, which are more powerful oxidizers than ozone. Therefore, when ozone water is sprayed, it is possible to obtain a stronger sterilization effect than when ozone gas is sprayed.

[0003] However, the above-mentioned prior art still has room for improvement, as will be described below.

[0004] Specifically, when ozone water is sprayed into a bathroom, ozone gas is liberated from the ozone water, increasing the ozone gas concentration in the bathroom. As this concentration increases, the odor characteristic of ozone becomes stronger. Meanwhile, to thoroughly and appropriately sterilize and clean a bathroom, it is necessary to ensure that the amount of ozone water sprayed into the bathroom is sufficient. To achieve this, the spray time of the ozone water must be extended to a certain extent. However, extending the spray time of the ozone water in this manner significantly increases the ozone gas concentration in the bathroom. As a result, in situations where the ozone gas concentration is high, people may be uncomfortable if they accidentally enter the bathroom. Furthermore, if high concentrations of ozone gas leak outside the bathroom through gaps in the bathroom door, for example, the odor may cause discomfort. It is desirable to appropriately address these issues. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-48858 [Patent Document 2] Patent No. 3992942 [Patent Document 3] Japanese Patent Application Publication No. 11-14116 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention was conceived under the circumstances described above, and its object is to provide a bathroom sterilization and cleaning system that can efficiently and appropriately sterilize and clean a bathroom using ozone water while preventing the ozone gas concentration in the bathroom from becoming excessively high. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides the following technical solutions.

[0008] The bathroom sterilization and cleaning system provided by the present invention is a bathroom sterilization and cleaning system comprising an air blower capable of blowing air into a bathroom, a ventilation device capable of exhausting air from the bathroom to the outside to ventilate the bathroom, and an ozone water sprayer capable of spraying ozone water into the bathroom in order to perform a sterilization and cleaning process for the bathroom.The bathroom sterilization and cleaning system is characterized in that when the sterilization and cleaning process for the bathroom is performed, the ozone water spraying operation into the bathroom is carried out in multiple sessions with interval periods between them, and the air blowing and ventilation are stopped during each of the multiple ozone water spraying operations, while the air blowing and ventilation are carried out during the interval periods.

[0009] This configuration provides the following effects. That is, because the ozone water spraying operation into the bathroom is performed in multiple separate sessions with intervals in between, the total amount of ozone water sprayed in the multiple ozone water spraying operations can be ensured to be sufficient, allowing for appropriate bathroom sterilization and cleaning. Meanwhile, the amount of ozone water sprayed in each ozone water spraying operation can be reduced. Therefore, it is possible to appropriately prevent the ozone gas concentration in the bathroom from becoming excessively high due to the liberation of ozone gas from the ozone water when each ozone water spraying operation is performed. As a result, it is possible to eliminate or reduce the risk of a person being uncomfortable due to the characteristic odor of ozone, for example, if they accidentally enter the bathroom. Furthermore, as an important effect, according to the present invention, since air is blown and ventilation is performed during the interval period, it is possible to actively reduce the ozone gas concentration in the bathroom during this interval period, and therefore when the ozone water spraying operation is resumed after the interval period has ended, it is more thoroughly prevented that the ozone gas concentration in the bathroom becomes high. Ozone gas has a higher specific gravity than air and tends to accumulate in the lower part of the bathroom, but during the interval period, air is blown into the bathroom and ventilation is performed simultaneously, so the ozone gas does not accumulate in the lower part of the bathroom. Therefore, during the interval period, the ozone gas concentration in the bathroom can be reduced efficiently and quickly. During the ozone water spraying operation, the air supply and ventilation to the bathroom are stopped, so that the air supply and ventilation do not adversely affect the ozone water spraying operation, and also the waste of electrical energy required for the air supply and ventilation is eliminated.

[0010] In the present invention, it is preferable that a bathroom drying device capable of performing a bathroom drying operation for drying the bathroom is provided, and this bathroom drying device is equipped with the air blower, the ventilation device, and the ozone water spray device.

[0011] This configuration provides the following effects. In other words, bathroom dryers are generally equipped with air blowers and ventilation devices. Using such a bathroom dryer as a component of the bathroom disinfecting and cleaning system of the present invention makes the overall configuration rational and is preferable for reducing costs.

[0012] In the present invention, preferably, the bathroom drying operation is a state in which warm air is blown into the bathroom from the blower device and the ventilation is performed in parallel with this warm air blowing, and the bathroom drying operation is configured to be executed after the final ozone water spray operation of the multiple ozone water spray operations is completed.

[0013] With this configuration, after the final ozone water spraying operation is completed, a bathroom drying operation is performed in which warm air is blown and ventilation is performed in parallel, so that ozone water and ozone gas can be quickly removed from the bathroom.

[0014] In the present invention, preferably, the ozone water spraying device is configured to spray ozone water toward a side wall surface of the bathroom. The bathroom is equipped with a first nozzle for spraying ozone water and a second nozzle for spraying ozone water toward the bathroom floor, and when the multiple ozone water spraying operations are performed, the ozone water spraying operation toward the side wall surface using the first nozzle is performed first, and then the ozone water spraying operation toward the floor surface using the second nozzle is performed after the interval period.

[0015] With this configuration, the bathroom sidewalls are sterilized and cleaned by spraying ozone water using the first nozzle, and then, after an interval, the bathroom floor is sterilized and cleaned by spraying ozone water using the second nozzle. Because the bathroom sidewalls and floor are sterilized and cleaned separately, ozone water can be sprayed at a high density onto each of the sidewalls and floor, improving the sterilization and cleaning efficiency of those areas. Furthermore, because the bathroom floor is sterilized and cleaned after the bathroom sidewalls, the sterilization and cleaning proceeds from the top to the bottom of the bathroom, again resulting in high sterilization and cleaning efficiency.

[0016] Other features and advantages of the present invention will become more apparent from the following description of the preferred embodiments of the invention, which proceeds with reference to the accompanying drawings. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a schematic explanatory diagram showing an example of a bathroom sterilization and cleaning system according to the present invention. [Figure 2] 2 is a schematic cross-sectional view of a main part of a bathroom drying device that is a component of the bathroom sterilizing and cleaning system shown in FIG. 1. [Figure 3] FIG. 3 is an explanatory diagram showing an example of the state of air blowing into a bathroom in the bathroom sterilizing and cleaning system shown in FIGS. 1 and 2. [Figure 4] 3 is an explanatory diagram showing an example of a state in which ozone water is sprayed in the bathroom sterilization and cleaning system shown in FIGS. 1 and 2. FIG. [Figure 5] 3 is a flowchart showing an example of an operation procedure executed in the bathroom disinfecting and cleaning system shown in FIGS. 1 and 2. [Figure 6] 6(a) to 6(d) are time charts corresponding to the operation procedure shown in FIG. [Figure 7] 10 is a schematic cross-sectional view of the main parts of another example of a bathroom disinfection and cleaning system according to the present invention. FIG. [Figure 8] 8(a) and 8(b) are explanatory views showing an example of the state of spraying ozone water in the bathroom sterilization and cleaning system shown in FIG. 7. [Figure 9] 8 is a flowchart showing an example of an operation procedure executed in the bathroom disinfecting and cleaning system shown in FIG. 7. [Figure 10] 10(a) and 10(b) are explanatory diagrams showing other examples of nozzles used for spraying ozone water. DETAILED DESCRIPTION OF THE INVENTION

[0018] Preferred embodiments of the present invention will now be described in detail with reference to the drawings.

[0019] The bathroom sterilization and cleaning system SY shown in Figures 1 and 2 is configured with a bathroom drying device A. Bathroom drying device A is configured by combining a main body A0 installed above bathtub 11 in ceiling 10 of bathroom 1 with a separate remote control 2, and an ozone water sprayer 4 (described later) is built into main body A0. Bathroom drying device A is configured to receive hot water from water heater 8. Water heater 8 is capable of supplying hot water to bathtub 11 via piping 80, and also has a general hot water supply function for the kitchen, etc., and is equipped with bathroom remote control 81A and kitchen remote control 81B.

[0020] The main body A0 of the bathroom drying device A includes a blower fan 30 (also called a circulation fan), a heat exchanger 31 for heating air, a ventilation fan 32, a mist ejection nozzle 33, an ozone water spray device 4, a control unit 5, and a housing 34 that covers all of these parts. The blower fan 30 and the ventilation fan 32 correspond to specific examples of the blower device and the ventilation device, respectively, of the present invention.

[0021] Blower fan 30 draws air through air inlet 35a located on the underside of housing 34 and blows it into bathroom 1 via louver 36 located at the air outlet. Heat exchanger 31 heats the air drawn into blower fan 30 through air inlet 35a. Heated hot water can be supplied to heat exchanger 31 from water heater 8 as the heating medium. When blower fan 30 is running, heated hot water is supplied from water heater 8 to heat exchanger 31, heating the air drawn through air inlet 35a, and warm air is blown into bathroom 1 via louver 36. During bathroom drying operation of bathroom dryer device A, the warm air blowing described above and ventilation by ventilation fan 32 are performed in parallel. When the supply of heated hot water to heat exchanger 31 is stopped, unheated air (unheated air) is blown into bathroom 1 through louver 36.

[0022] The direction of louver 36 can be changed by a motor (not shown), and the air blowing angle when blowing air into bathroom 1 can be changed as needed. During interval period Pb during the sterilizing and cleaning process of bathroom 1, which will be described later, louver 36 is configured to blow air diagonally downward toward washing area 1a of bathroom 1, as shown in Figure 3. Preferably, the air blowing direction has an angle of 30 to 60° relative to vertical line VL (the range of α1 to α2 in Figure 3, where α1 = 30° and α2 = 60°). In FIG. 3, reference numeral 18 denotes the entrance to the bathroom 1, which can be opened and closed by a door 17.

[0023] Ventilation fan 32 is a fan for exhausting air from bathroom 1 to the outdoors. When ventilation fan 32 is operated, air from bathroom 1 is drawn into housing 34 through air intake port 35a, enters the area where ventilation fan 32 is installed, and is then exhausted to the outdoors through exhaust port 37. Preferably, the rotation speed of the ventilation fan 32 is variable, and when normal bathroom ventilation is performed, the speed is relatively slow so that the driving noise of the ventilation fan 32 is low, but during the interval period Pb during the sterilization and cleaning process of the bathroom 1 described below, the speed is set to be faster than during normal bathroom ventilation so that the ventilation capacity is increased.

[0024] Mist spray nozzle 33 is a nozzle that sprays a mist of hot water into bathroom 1 when a bather wishes to take a mist shower. Water supply piping 60, which supplies hot water to mist spray nozzle 33, is equipped with an on-off valve Va, such as a solenoid valve, and a heat exchanger 61. When on-off valve Va is open, hot water mist is sprayed from mist spray nozzle 33. Heated hot water can be supplied from water heater 8 to heat the hot water supplied to mist spray nozzle 33. Like louver 36, the orientation of mist spray nozzle 33 can be changed by a motor (not shown).

[0025] Ozone water spray device 4 includes piping 40 branched from water supply piping 60, an on-off valve Vb such as a solenoid valve provided on piping 40, ozone water generator 42, and nozzle 43 for spraying ozone water. Ozone water generator 42 may be of a conventionally known configuration, such as one that generates ozone water by electrolysis using electrodes or one that generates ozone gas from air and dissolves it in water. When on-off valve Vb is set to an open state, ozone water generated by ozone water generator 42 is sprayed from nozzle 43 toward bathroom 1. For example, as shown in FIG. 4 , nozzle 43 sprays ozone water onto substantially the entire bathroom floor 13 and onto each sidewall 12 of bathroom 1, except for the upper portions of each sidewall 12.

[0026] Control unit 5 is configured using a microcomputer and other components, and controls the operation of each component of bathroom drying device A, causing it to perform drying operations for bathroom 1 and, as will be described later, sterilizing and cleaning processes for bathroom 1. Control unit 5 can wirelessly communicate data with remote control 2 via communication unit 50. The remote control 2 is, for example, portable and includes a communication circuit (not shown) for wirelessly communicating with the control unit 5 via the communication unit 50, a plurality of operation switches 20 for issuing various operational commands, a display unit 21, and a speaker 22 capable of outputting sounds such as voice messages.

[0027] Next, an example of the operational processing procedure executed in the bathroom sterilizing and cleaning system SY will be described with reference to the flowchart shown in Figure 5. The operation of the system will also be described.

[0028] In the bathroom sterilizing and cleaning system SY of this embodiment, the sterilizing and cleaning process of the bathroom 1 is configured to be carried out in multiple sessions with interval periods Pb in between, and specifically, the following operational process is carried out. That is, when remote control 2 is used to perform an operation to start the sterilization and cleaning process of bathroom 1, control unit 5 starts the first ozone water spraying operation (S1: YES, S2). The ozone water spraying operation is performed in the manner described with reference to Figure 4, and at that time, blower fan 30 and ventilation fan 32 are stopped. Therefore, it is possible to prevent the ozone water spraying operation from being adversely affected by the operation of blower fan 30 and ventilation fan 32.

[0029] The first ozone water spraying operation is performed for a predetermined time, for example. After this ozone water spraying operation period Pa has elapsed, an interval period Pb is set and the ozone water spraying operation ends (S3). At this point, blower fan 30 and ventilation fan 32 begin operating, and the blowing of air (unheated air) into bathroom 1 and the ventilation of bathroom 1 begin. When the first ozone water spraying operation ends, a large amount of ozone gas liberated from the ozone water has accumulated in bathroom 1, resulting in a high ozone gas concentration. However, during interval period Pb, the ozone gas concentration can be rapidly reduced.

[0030] Because ozone gas has a higher specific gravity than air, it is difficult to smoothly exhaust it to the outside through ventilation fan 32 installed on ceiling 10 of bathroom 1. In contrast, if air is blown by blower fan 30 as shown in Figure 3, ozone gas can be efficiently raised around the air blowing area (the area where the blowing airflow is generated) and guided to air inlet 35a, and then smoothly exhausted to the outside using ventilation fan 32. When a person opens door 17 and air is blown out from louver 36 toward washing area 1a, ozone gas is exhausted from entrance / exit 18, reducing the ozone gas concentration.

[0031] When the set time for interval period Pb reaches a predetermined time and ends, a second ozone water spraying operation is initiated (S4). In this case, the operation of blower fan 30 and ventilation fan 32 is stopped. Next, this second ozone water spraying operation is performed for a predetermined time. When ozone water spraying operation period Pc ends, bathroom drying device A then performs bathroom drying operation (S5). As previously mentioned, during this bathroom drying operation, warm air is blown into bathroom 1 and ventilation of bathroom 1 is performed by ventilation fan 32 in parallel. Bathroom drying period Pd ends, for example, when the humidity in bathroom 1, detected by a humidity sensor (not shown) attached to bathroom drying device A, falls below a predetermined value, or when a preset timer time has elapsed. By performing the bathroom drying operation, bathroom 1 can be quickly transformed into an atmosphere free of ozone water and ozone gas.

[0032] In the above-described series of operational procedures, on / off control of each component is performed as shown in the time chart of Figure 6. The specific lengths of the first and second ozone water spraying operation periods Pa and Pc, the interval period Pb, and the bathroom drying period Pd in ​​Figure 6 can be determined in advance by the manufacturer of the bathroom sterilization and cleaning system SY through testing to find optimal or near-optimal values ​​(times), and these values ​​can be applied. However, taking into account the size of bathroom 1 and various other conditions, the length of each of the periods Pa through Pd can also be changed as needed by the user operating remote control 2.

[0033] According to the bathroom sterilization and cleaning system SY of this embodiment, when a sterilization and cleaning process is performed on bathroom 1, the ozone water spraying operation is performed twice, separated by an interval period Pb. Moreover, during the interval period Pb, the ozone gas generated in bathroom 1 by the first ozone water spraying operation is discharged outdoors. Therefore, it is possible to appropriately prevent the ozone gas concentration in bathroom 1 from becoming higher than a predetermined level during each ozone water spraying operation. As a result, it is possible to eliminate or reduce the risk of a person being uncomfortable due to the characteristic odor of ozone, for example, if they accidentally enter bathroom 1. On the other hand, the total amount of ozone water sprayed into bathroom 1 by the two ozone water spraying operations can be made sufficient, so that bathroom 1 can be sterilized and cleaned appropriately.

[0034] 7 to 10 show other embodiments of the present invention. In these figures, elements that are the same as or similar to those in the above embodiment are given the same reference numerals as in the above embodiment, and duplicated explanations will be omitted.

[0035] The ozone water sprayer 4a provided in the bathroom drying device Aa of the bathroom sterilizing and cleaning system SY' shown in Figure 7 includes first and second nozzles 43A and 43B and corresponding additional on-off valves Vc and Vd, allowing ozone water generated by an ozone water generator 42 to be selectively supplied to either the first or second nozzle 43A or 43B. As shown in Figure 8(a), the first nozzle 43A sprays ozone water toward the side wall surface 12 of the bathroom 1, with very little spraying onto the floor surface 13. In contrast, the second nozzle 43B sprays ozone water toward the floor surface 13 of the bathroom 1, with very little spraying onto the side wall surface 12, as shown in Figure 8(b).

[0036] In the bathroom sterilizing and cleaning system SY' of this embodiment, when a sterilizing and cleaning process is performed in the bathroom 1, for example, the operational process shown in the flowchart of FIG. 9 is executed. However, in Figure 9, steps that are the same as the operational processing shown in Figure 5 are given the same symbols, and steps S2' and S4' in Figure 9 are slightly different from steps S2 and S4 in Figure 5.

[0037] Specifically, in step S2', a first ozone water spraying operation is performed, and this operation is performed in the manner shown in Figure 8(a). That is, ozone water is sprayed toward side wall surface 12 of bathroom 1 using first nozzle 43A. Next, in step S4', a second ozone water spraying operation is performed, and this operation is performed in the manner shown in Figure 8(b). That is, ozone water is sprayed toward floor surface 13 of bathroom 1 using second nozzle 43B.

[0038] According to this operation procedure, the first ozone water spraying operation intensively sterilizes and cleans the side wall surface 12 of the bathroom 1, and the second ozone water spraying operation intensively sterilizes and cleans the floor surface 13 of the bathroom 1. Therefore, the sterilization and cleaning efficiency for each of the side wall surface 12 and floor surface 13 of the bathroom 1 can be made better than in the previous embodiment.

[0039] In the ozone water spray device 4b shown in Figure 10(a), the second nozzle 43B is supplied with ozone water generated by the ozone water generator 42, while the first nozzle 43A is configured to receive normal water supply (in Figures 10(a) and (b), symbols Vc to Ve indicate on-off valves similar to on-off valves Va and Vb). With this configuration, normal water is sprayed from the first nozzle 43A onto the side wall surface 12 of the bathroom 1 to create a so-called water washing state, and then ozone water is sprayed from the second nozzle 43B onto the floor surface 13 of the bathroom 1 to perform sterilization and cleaning. In the present invention, the ozone water spraying operation is performed multiple times with an interval period in between, and therefore the ozone water spraying operation from the second nozzle 43B is repeatedly performed multiple times with an interval period in between.

[0040] 10(a), the ozone water spray device 4c shown in Fig. 10(b) is configured such that the ozone water generated by the ozone water generator 42 is supplied to the second nozzle 43B but not to the first nozzle 43A. However, hot water that has been heated through the heat exchanger 61 can be supplied to the first nozzle 43A. With this configuration, when hot water is sprayed from the first nozzle 43A onto the side wall surface 12 of the bathroom 1, the hot water can be made into warm water, thereby improving the cleaning ability for the side wall surface 12 compared to the case of Figure 10(a).

[0041] The present invention is not limited to the above-described embodiment, and the specific configuration of each part of the bathroom disinfecting and cleaning system according to the present invention can be freely modified in various ways within the intended scope of the present invention.

[0042] In the above-described embodiment, when the bathroom is sterilized and cleaned, the ozone water spraying operation is divided into two separate operations with an interval between them, but the present invention is not limited to this. The ozone water spraying operation may be divided into three or more separate operations with an interval between them.

[0043] The ozonated water spray device may be configured to spray ozonated water into a bathroom, and the specific method for generating ozonated water and the ozone concentration of the generated ozonated water are not limited. As can be understood from the above-described embodiment, the number of nozzles for spraying ozonated water is not limited to one, and multiple nozzles may be used, and the specific number is not important. The ozonated water may not only be sprayed continuously, but also intermittently at a predetermined short interval, for example.

[0044] During the interval period, air is blown into the bathroom and ventilation is performed. Air is preferably blown into the bathroom in the manner shown in FIG. 3, for example, but the present invention is not limited to this.

[0045] In the above-described embodiment, the bathroom sterilizing and cleaning system is configured by further adding an ozone water spraying function to a bathroom drying device equipped with a blower fan and a ventilation fan, but the present invention is not limited to this. For example, the ozone water spraying device could be installed in a location separate from the bathroom drying device. Furthermore, although less practical, the bathroom sterilizing and cleaning system of the present invention could also be configured without using a bathroom drying device. When a bathroom drying device is used, an electric heater, for example, could be used as the air heating means for generating the warm air used in the bathroom drying operation. The specific configuration of the air blower and ventilation device referred to in the present invention is not limited. [Explanation of symbols]

[0046] SY,SY' Bathroom sterilization and cleaning system A,Aa Bathroom drying equipment 1 bathroom 12 Side wall 13 Floor 30 Blower fan (blower device) 32 Ventilation fan (ventilation device) 4, 4a~4c Ozone water spray device 43 nozzle 43A, 43B First and second nozzles

Claims

1. a blower capable of blowing air into the bathroom; a ventilation device capable of ventilating the bathroom by exhausting air from the bathroom to the outside; an ozone water spraying device capable of spraying ozone water into the bathroom to perform a sterilization and cleaning treatment of the bathroom; A bathroom disinfection and cleaning system comprising: When the sterilization and cleaning process of the bathroom is performed, the ozone water spraying operation into the bathroom is performed in multiple divided steps with intervals between each step, A bathroom sterilization and cleaning system characterized in that the air blowing and ventilation are stopped during each of the multiple ozone water spraying operations, while the air blowing and ventilation are performed during the interval period.

2. The bathroom disinfection and cleaning system according to claim 1, A bathroom drying device capable of performing a bathroom drying operation for drying the bathroom is provided. The bathroom sterilization and cleaning system comprises the bathroom drying device, the air blower, the ventilation device, and the ozone water spray device.

3. The bathroom disinfection and cleaning system according to claim 2, The bathroom drying operation is a state in which warm air is blown from the air blower device to the bathroom, and the ventilation is performed in parallel with the warm air blowing, The bathroom sterilization and cleaning system is configured so that the bathroom drying operation is performed after the final ozone water spraying operation among the multiple ozone water spraying operations is completed.

4. The bathroom disinfection and cleaning system according to any one of claims 1 to 3, The ozone water spraying device includes a first nozzle for spraying ozone water toward a side wall surface of the bathroom, and a second nozzle for spraying ozone water toward a floor surface of the bathroom, A bathroom sterilization and cleaning system configured such that, when the multiple ozone water spraying operations are performed, the ozone water spraying operation onto the side wall surface using the first nozzle is performed first, and then the ozone water spraying operation onto the floor surface using the second nozzle is performed after the interval period.

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