JP6369271B2 - Liquid sterilizer and bathtub water sterilization system - Google Patents

Description

  The present invention relates to a liquid sterilization apparatus and a bath water sterilization system having a function of sterilizing a liquid with a sterilizing gas.

  In general, as a method for sterilizing a stored liquid, a method of introducing a sterilizing gas such as ozone gas into the liquid is known. However, ozone gas, which is a gas, leaks out of the liquid storage part and may be erroneously sucked by surrounding people or may cause a strange odor. As a conventional technique for dealing with such a problem, for example, a cleaning apparatus described in Patent Document 1 is known. In the prior art, a lid body and an intake passage are provided in the liquid storage portion, and when introducing ozone gas into the liquid storage portion, ozone gas that leaks outside is sucked into the intake passage.

JP2013-150966A

  However, in the prior art described in Patent Document 1 described above, there is a possibility that ozone gas may be introduced into the liquid reservoir even when the liquid reservoir is not sealed due to the displacement of the lid or the like. In this case, the above-mentioned problems such as erroneous suction and odor are caused.

  The present invention has been made to solve the above-described problems, and avoids introduction of a sterilizing gas into a liquid when the reservoir is not sealed, thereby suppressing gas leakage. An object of the present invention is to provide a liquid sterilization apparatus and a bath water sterilization system capable of sterilizing a liquid.

The liquid sterilization apparatus according to the present invention has an opening, a storage part that stores the liquid, a lid that closes the opening of the storage part, and a part of the liquid stored in the storage part, and then the storage part A circulation passage for returning to the liquid, gas supply means for generating a sterilizing gas for sterilizing the liquid, mixing the sterilizing gas with the liquid taken out from the storage portion to the circulation passage, and a closed state of the storage portion by the lid A blocking means detecting means for detecting; a control means having a function of driving and stopping the gas supply means; and controlling the supply state of the sterilizing gas supplied to the reservoir based on the detection result of the blocking state detecting means; A gas concentration detecting means for detecting the concentration of the sterilizing gas present in the storage section; and a humidifying means capable of humidifying the storage section, wherein the control means has a concentration at which the concentration of the sterilizing gas is set in advance. More than the judgment value and the reservoir by the lid When detecting that it is not closed, Ru der those configured for driving the humidifying means.

  According to the present invention, when the reservoir is not closed, the sterilization operation can be forcibly stopped regardless of the user's operation or the like. Thereby, it is possible to smoothly sterilize the liquid when the reservoir is closed while preventing leakage of the sterilizing gas due to the displacement of the lid or the like. Therefore, it is possible to realize a liquid sterilization device that is easy to use for the user by suppressing the off-flavor, erroneous suction, and the like due to leakage of the sterilizing gas.

It is a block diagram which shows typically the liquid sterilizer by Embodiment 1 of this invention. In Embodiment 1 of this invention, it is a longitudinal cross-sectional view which shows an example of a fine bubble generator. It is explanatory drawing which shows an example when the obstruction | occlusion state of a storage part is inadequate by the shift | offset | difference etc. of a cover body. It is explanatory drawing which shows another example when the obstruction | occlusion state of a storage part is inadequate. It is a block diagram which shows typically the liquid sterilizer by Embodiment 2 of this invention. In Embodiment 2 of this invention, it is a characteristic diagram which shows the characteristic of the distribution coefficient with respect to water temperature. It is a block diagram which shows typically the modification in Embodiment 2 of this invention. It is a block diagram which shows typically the liquid sterilizer by Embodiment 3 of this invention. In Embodiment 3 of this invention, it is a characteristic diagram which shows the relationship between the amount of ozone gas generation per unit time, and humidity. It is a block diagram which shows typically the bathtub water sterilization system by Embodiment 4 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In each drawing used in this specification, common elements are denoted by the same reference numerals, and redundant description is omitted. Further, the present invention is not limited to the following embodiments, and can be variously modified without departing from the gist of the present invention. Further, the present invention includes all combinations of configurations that can be combined among the configurations shown in the following embodiments.

Embodiment 1 FIG.
First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram schematically showing a liquid sterilizer 1 according to Embodiment 1 of the present invention. As shown in this figure, the liquid sterilizer 1 includes a reservoir 2, a lid 4, a tank 5, a circulation passage 6, a circulation pump 7, a supply passage 8, a solenoid valve 9, a gas supply means 10, and the like. The storage part 2 stores liquids, such as hot water, for example, and the upper surface part is opening. The opening 3 of the reservoir 2 is closed by a detachable lid 4. The reservoir 2 is used with the lid 4 removed as necessary.

  The tank 5 stores liquid and is connected in the middle of the circulation passage 6 via the supply passage 8. The circulation passage 6 is a passage for taking out a part of the liquid stored in the storage portion 2 and returning it to the storage portion 2. The circulation passage 6 is provided with a circulation pump 7 that circulates the liquid stored in the storage portion 2 through the circulation passage 6. The supply passage 8 supplies the liquid stored in the storage section 2 to the circulation passage 6 and includes an electromagnetic valve 9 that opens and closes the supply passage 8. The electromagnetic valve 9 also has a function of preventing the back flow of liquid from the circulation passage 6 to the tank 5. When the circulation pump 7 is operated, a part of the liquid stored in the storage unit 2 is taken out to the circulation path 6, and this liquid is returned to the storage unit 2 after circulating through the circulation path 6. When the electromagnetic valve 9 is opened in this state, the liquid stored in the tank 5 is supplied to the storage unit 2 through the supply passage 8 and the circulation passage 6.

  The gas supply means 10 generates a sterilizing gas for sterilizing the liquid stored in the storage unit 2, and mixes the sterilizing gas with the liquid taken out from the storage unit 2 to the circulation passage 6. The gas supply means 10 includes a gas generator 11 and a fine bubble generator 12. For example, when the gas to be used is ozone gas, the gas generator 11 is configured by an ozonizer that generates ozone in a sealed container including a chamber and the like. Ozone is a gas with high oxidizing power and is often used for underwater sterilization and cleaning applications. The gas generating device 11 introduces the generated ozone into the fine bubble generating device 12 by a gas conveying means (not shown) such as an air pump or the venturi effect of the fine bubble generating device 12. In the present specification, ozone gas generated by the gas generator 11 is referred to as “sterilizing gas”. However, in the present invention, the “sterilizing gas” is not limited to ozone gas, and other various gases having a sterilizing action can be applied.

  The fine bubble generator 12 generates fine bubbles of sterilizing gas in the liquid returned from the circulation passage 6 to the storage unit 2. The fine bubble generating device 12 is configured by, for example, a nozzle having a venturi effect, and is connected in the middle of the circulation passage 6. FIG. 2 is a longitudinal sectional view showing an example of the fine bubble generator 12 in Embodiment 1 of the present invention. As shown in this figure, the fine bubble generator 12 includes a spiral fixed blade 12A, a reduced diameter portion 12B in which the flow path is partially reduced on the downstream side of the fixed blade 12A, and a contraction from the gas generator 11. The gas introduction part 12C which introduces the gas for sterilization is provided in the position of the diameter part 12B. The gas introduction part 12 </ b> C is a passage opened and closed by the electromagnetic valve 13 in FIG. 1 and is connected to the gas generator 11.

  In FIG. 2, when the liquid circulating in the circulation passage 6 passes through the fine bubble generating device 12, a swirling flow is generated in the liquid flow A by the fixed blade 12A. Further, at the position of the reduced diameter portion 12B, a negative pressure is generated due to the venturi effect. At this time, if the electromagnetic valve 13 is open, the sterilizing gas generated by the gas generator 11 is sucked into the reduced diameter portion 12B through the gas introduction portion 12C by negative pressure as indicated by the arrow B. It is. The sucked gas for sterilization is mixed in the liquid while being refined by colliding with the swirling flow of the liquid. Thus, the gas supply means 10 can generate sterilizing gas fine bubbles in the liquid flowing through the circulation passage 6.

(Control system)
Next, the control system of the liquid sterilizer 1 will be described. As shown in FIG. 1, the liquid sterilizer 1 includes brightness detection means 20, pressure detection means 21, and a control unit 30. These means 20 and 21 constitute a specific example of a closed state detecting means for detecting the closed state of the storage unit 2 by the lid body 4. The brightness detection means 20 is configured by, for example, an illuminance sensor using a photodiode, and is disposed inside the storage unit 2. The brightness detection unit 20 converts light incident on the light receiving element into an electric current, and detects the brightness (or illuminance) in the storage unit 2. The pressure detection means 21 is constituted by, for example, a pressure sensor using a piezo element, and is disposed at the peripheral edge of the opening 3 of the reservoir 2. The pressure detection means 21 detects, for example, the presence of the lid 4 as a pressure by converting a change in electrical conductivity of the resistance (piezoresistance effect) generated according to the pressure into a current.

  The control unit 30 is configured by a microcomputer, for example, and constitutes a specific example of the control means of the present embodiment. The control unit 30 includes: a storage unit including a ROM, a RAM, a nonvolatile memory, etc .; a signal processing unit (CPU) that executes predetermined arithmetic processing based on a program stored in the storage unit; and a signal processing unit Input / output ports for inputting / outputting external signals. Brightness detection means 20 and pressure detection means 21 are connected to the input side of the control unit 30. Solenoid valves 9 and 13, circulation pump 7 and gas generator 11 are connected to the output side of control unit 30. The control unit 30 controls the supply state of the liquid from the tank 5 to the storage unit 2 and the generation state of the sterilization gas by the gas generator 11 (that is, the supply state of the sterilization gas to the liquid flowing through the circulation passage 6). be able to.

(Operation of the liquid sterilizer 1)
Next, the operation of the liquid sterilizer 1 will be described. In FIG. 1, for example, when the user operates a sterilization start button (not shown) provided in the control unit 30, the liquid sterilization apparatus 1 is activated and the control unit 30 performs a sterilization operation. In this sterilization operation, first, the gas generator 11 is driven to generate a sterilizing gas. For example, after the gas generator 11 is operated for a certain period of time, the circulation pump 7 is driven and the electromagnetic valve 9 is opened. Thereby, the liquid in the storage part 2 circulates through the circulation path 6, and the fine bubbles of the sterilizing gas are mixed with the liquid by the fine bubble generator 12. The fine bubbles have a small diameter of, for example, 50 μm or less, and have a low flying speed in the liquid. Therefore, it can float in a liquid for a long time and can fully exhibit the bactericidal effect.

  As described above, the liquid in which the sterilizing gas is mixed is circulated between the storage unit 2 and the circulation passage 6 so that the entire liquid in the storage unit 2 can be sterilized. Moreover, the control part 30 presets the operating time of the liquid sterilizer 1 based on the liquid quantity, liquid temperature, etc. of the storage part 2, for example. And when the set time passes after starting the said sterilization operation | movement, while stopping the gas generator 11 and the circulation pump 7, the solenoid valve 13 is closed, and sterilization operation | movement is complete | finished. Thereby, the sterilization operation using the gas for sterilization can be continued for a minimum necessary time.

  Further, when the liquid sterilizer 1 is used, the opening 3 of the reservoir 2 may not be completely closed by the lid 4. FIG. 3 and FIG. 4 are explanatory diagrams illustrating an example in which the closed state of the storage unit 2 is insufficient due to the displacement of the lid 4 or the like. In these cases, if a normal sterilization operation is performed, the sterilization gas may leak from the storage unit 2. For this reason, the control unit 30 detects the closed state of the storage unit 2 based on the outputs of the brightness detection unit 20 and the pressure detection unit 21 when operating the liquid sterilizer 1. Then, the sterilization operation is permitted and prohibited depending on whether or not the storage unit 2 is closed by the lid 4.

  More specifically, the control unit 30 determines whether the brightness in the storage unit 2 detected by the brightness detection unit 20 is equal to or higher than a preset brightness reference value, or the pressure detected by the pressure detection unit 21. Is less than or equal to a preset pressure reference value, it is determined that the reservoir 2 is not blocked, and the sterilization operation is prohibited. This prohibition operation is realized by stopping at least one of the gas generator 11 and the circulation pump 7 or closing the electromagnetic valve 13.

  Here, the brightness reference value is set in advance, for example, according to the detection value of the brightness detection means 20 in a state where the lid 4 closes the storage unit 2. As shown in FIG. 3, when the storage unit 2 is not properly closed, light enters the storage unit 2, so that the brightness detection value is equal to or higher than the brightness reference value, and the storage unit 2 is closed. Can be detected. On the other hand, the pressure reference value is set in advance according to the detection value of the pressure detection means 21 (in other words, the weight of the lid body 4) in a state where the lid body 4 closes the storage section 2. As shown in FIG. 4, when the lid 4 is not placed on the pressure detection means 21, since the detected pressure value is equal to or lower than the pressure reference value, it is detected that the reservoir 2 is not closed. can do.

  According to the above control, the closed state of the reservoir 2 can be detected based on the outputs of the brightness detection means 20 and the pressure detection means 21. And when the storage part 2 is not obstruct | occluded, sterilization operation | movement can be stopped compulsorily irrespective of a user's operation etc. Thereby, it is possible to smoothly sterilize the liquid when the storage unit 2 is closed while preventing leakage of the sterilizing gas due to the displacement of the lid 4 or the like. Therefore, the liquid sterilization apparatus 1 which is easy to use for the user can be realized by suppressing the strange odor and the erroneous suction due to the leakage of the sterilizing gas.

  In the present embodiment, since the brightness detection unit 20 and the pressure detection unit 21 are used as the blockage state detection unit, the blockage state of the storage unit 2 can be detected with high accuracy when both function complementarily. be able to. Specifically, the brightness detection means 20 is in a non-blocking state in which, for example, a gap is generated between the lid 4 and the storage unit 2 in a state where the lid 4 is placed on the storage unit 2. Can be easily detected. On the other hand, the pressure detection unit 21 can detect a non-blocking state in which, for example, the lid 4 is displaced from the storage unit 2 with the position of the brightness detection unit 20 covered. Therefore, by using these means 20 and 21 together, it is possible to detect the displacement of the lid body 4 more reliably.

  As shown in FIG. 1, in a state where the lid 4 closes the storage unit 2, the brightness in the storage unit 2 is less than the brightness reference value, and the pressure detected by the pressure detection means 21 is the pressure. It becomes larger than the reference value. In this case, the sterilization operation is permitted by the control unit 30, and the sterilization operation can be executed according to a user operation or the like. In addition, in this Embodiment, when it detects that the storage part 2 is not obstruct | occluded, it is good also as a structure which performs the alerting | reporting operation | movement for alert | reporting this state while prohibiting disinfection operation | movement.

  Further, in the present embodiment, the gas generator 11 and the venturi (swirl flow type) fine bubble generator 12 are combined as the gas supply means. As a result, the contact area between the liquid stored in the storage unit 2 and the sterilizing gas can be increased, and the sterilizing effect can be improved. Moreover, by making the gas for sterilization into fine bubbles, the time during which the gas stays in the liquid in a bubble state can be lengthened, and the sterilization efficiency can be increased.

  In the first embodiment, the case where the brightness detection means 20 and the pressure detection means 21 are arranged one by one is illustrated. However, the present invention is not limited to this, and a plurality of at least one of the brightness detection means 20 and the pressure detection means 21 may be provided as the closed state detection means. In the present invention, a sensor, a detection device, or the like other than the brightness detection unit 20 and the pressure detection unit 21 may be employed. Furthermore, in the present invention, the closed state of the reservoir 2 may be detected based on physical quantities other than brightness and pressure.

  In the first embodiment, the case where the gas generator 11 and the venturi (swirl flow type) fine bubble generator 12 are used as the gas supply means has been described as an example. However, the present invention is not limited to this, and gas-liquid mixing means other than the venturi type and the swirl type may be used as the gas supply means. Further, in the first embodiment, a gas for sterilization is generated by the gas generator 11 and the gas for sterilization is mixed with the liquid by the fine bubble generator 12. However, the present invention is not limited to this, and the gas supply means may directly inject a sterilizing gas or a component that becomes the gas into the liquid.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIGS. The present embodiment is characterized in that control according to temperature is performed. FIG. 5 is a configuration diagram schematically showing a liquid sterilizer according to Embodiment 2 of the present invention. As shown in this figure, the liquid sterilizer 41 of the present embodiment is configured in substantially the same manner as in the first embodiment, but includes a temperature detecting means 42. The temperature detection means 42 detects the temperature of the liquid taken out from the storage unit 2 to the circulation passage 6.

  In the present embodiment, the control unit 30 stops the generation of the sterilizing gas by the gas generator 11 when the temperature detected by the temperature detecting means 42 is equal to or higher than a preset temperature reference value. The sterilization operation is prohibited. This is due to the following reason. In general, the solubility of a gas in a liquid increases as the temperature of the liquid decreases. As a specific example, for example, when ozone gas is dissolved in water, the relationship between the concentration X (mg / L) of ozone gas introduced into the liquid and the saturated ozone concentration Y (mg / L) in water is as follows ( 1) It is expressed by the formula.

Y = X × D (1)

  In the above formula, D is a distribution coefficient. The distribution coefficient D has the characteristics shown in FIG. 6 with respect to the water temperature, and tends to increase as the water temperature decreases. That is, since the saturation concentration in the liquid increases as the water temperature decreases, the amount of gas vaporized from the liquid in the reservoir 2 decreases as the water temperature decreases. For this reason, in this embodiment, when the water temperature is higher than a certain allowable limit (= temperature reference value), it is determined that the amount of the sterilizing gas that is vaporized and leaks in the storage unit 2 increases, and the sterilization operation is performed. Is prohibited. On the other hand, when the water temperature is below a certain allowable limit, it is determined that the amount of the sterilizing gas leaking from the storage unit 2 is small, and the sterilization operation is permitted. According to this control, the sterilization operation can be executed only at a low temperature, and a strange odor due to gas leakage at the time of the sterilization operation can be suppressed under a high temperature condition.

  In the present embodiment, when the liquid temperature in the circulation passage 6 is equal to or higher than the temperature reference value, for example, a liquid having a temperature lower than the liquid temperature in the circulation passage 6 is introduced into the circulation passage 6. It is good also as a structure which performs sterilization operation | movement, after reducing liquid temperature. As a specific example, the present invention may employ a modification shown in FIG. FIG. 7 is a configuration diagram schematically showing a modification of the second embodiment of the present invention. In this modification, the liquid sterilizer 41 includes a cooling unit 43 that cools the liquid taken out from the storage unit 2 to the circulation passage 6.

  The cooling means 43 is connected to the control unit 30. When performing the sterilization operation, the control unit 30 first lowers the temperature of the liquid by the cooling means 43 while circulating the liquid in the circulation passage 6. Then, for example, after the temperature of the liquid in the circulation passage 6 is lower than the temperature reference value, the gas generator 11 generates a sterilizing gas and executes a sterilizing operation. According to this modification, the sterilization operation can be performed after the temperature of the liquid is lowered, for example, even under high temperature conditions, and convenience can be improved.

Embodiment 3 FIG.
Next, Embodiment 3 of the present invention will be described with reference to FIGS. FIG. 8 is a configuration diagram schematically showing a liquid sterilizer according to Embodiment 3 of the present invention. As shown in this figure, the liquid sterilization apparatus 51 according to the present embodiment includes a concentration detection unit 52 that detects the concentration of the sterilizing gas present in the storage unit 2, and a humidification unit 53 that humidifies the storage unit 2. It has. The concentration detection unit 52 and the humidification unit 53 are connected to the control unit 30. The control unit 30 controls the humidification unit 53 based on the detection result of the concentration detection unit 52.

  For example, when the sterilizing gas is ozone gas, the concentration detecting means 52 is configured by a sensor using a thin film semiconductor method. This sensor includes a semiconductor thin film that adsorbs ozone while being kept at a constant temperature. The resistivity of the thin film varies depending on the amount of ozone adsorbed. The concentration detection means 52 detects the concentration of ozone gas in the reservoir 2 by converting the change in resistivity of the thin film into a current.

  In the present embodiment configured as described above, the control unit 30 is configured such that the concentration of the sterilizing gas in the storage unit 2 is equal to or higher than a preset concentration determination value, and the storage unit 2 is closed by the lid 4. When it is detected that the sterilization is not performed, the sterilization operation is stopped and the humidifying means 53 is driven. The concentration determination value is set according to the concentration of the sterilizing gas in the storage unit 2 when the sterilization operation is performed, for example. Moreover, you may perform determination of whether the storage part 2 is obstruct | occluded based on the detected value of the brightness detection means 20 and the pressure detection means 21, as mentioned above.

  During the sterilization operation, when the storage unit 2 is not closed and when the storage unit 2 is opened, the sterilizing gas may leak around the storage unit 2. In this case, in this embodiment, not only the sterilization operation is stopped, but also the humidity in the storage unit 2 is increased by the humidifying means 53 to reduce the amount of existing ozone. FIG. 9 is a characteristic diagram showing the relationship between the amount of ozone gas generated per unit time and the humidity. As shown in this figure, in ozone gas, the amount of ozone gas generated tends to decrease as the humidity increases. Moreover, decomposition | disassembly of ozone in air is accelerated | stimulated, so that humidity is high. Therefore, the humidifying means 53 can reduce the amount of existing ozone.

  Thus, according to the present embodiment, after the start of the sterilization operation, the lid body 4 is not placed on the storage unit 2 or the lid body 4 is removed during the sterilization operation. The sterilization operation can be stopped and the amount of the sterilizing gas remaining in the storage unit 2 can be reduced by the humidifying means 53. As a result, leakage of the sterilizing gas can be suppressed as much as possible, and the off-flavor can be reduced. In addition, the humidification means 53 is good also as a structure stopped when the density | concentration of the gas for sterilization in the storage part 2 falls below the said density | concentration judgment value.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to FIG. The feature of this embodiment is that the liquid sterilization apparatus is applied to a bath water sterilization system. FIG. 10: is a block diagram which shows typically the bathtub water sterilization system by Embodiment 4 of this invention. In addition, in this figure, the case where the liquid sterilizer 51 described in the said Embodiment 3 is applied to a bathtub water sterilization system was illustrated. However, the present invention is not limited to this, and the liquid sterilization apparatuses 1 and 41 described in the first and second embodiments may be applied to a bath water sterilization system.

  The bathtub water sterilization system 61 of this Embodiment is provided with the liquid sterilizer 51 as shown in FIG. Here, the storage part 2 of the liquid sterilizer 51 constitutes a bathtub 63 disposed in the bathroom 62, and stores the bathtub water as the liquid. The lid 4 covers the upper opening of the bathtub 63. Further, the tank 5 is constituted by a hot water storage tank that supplies hot water to the bathtub 63 at the time of chasing. The bathtub water sterilization system 61 mixes sterilization gas with the liquid sterilizer 51 with respect to the bathtub water taken out from the bathtub 63 to the circulation passage 6, and sterilizes the bathtub water.

  According to the present embodiment, the liquid sterilization apparatus 1, 41, 51 described in the first to third embodiments can be applied to the bath water sterilization system 61. The same effect as 3 can be obtained. That is, bath water can be sterilized smoothly when the reservoir 2 is closed while preventing leakage of the sterilizing gas due to the displacement of the lid 4 or the like. And the bad odor by a leak of the gas for sterilization, a false suction, etc. are suppressed, and the bathtub water sterilization system 61 easy to use for a user is realizable.

  Moreover, the bathtub water sterilization system 61 is good also as a structure provided with the ventilator 64 linked with the bathtub water sterilization system 61, as shown in FIG. The ventilation device 64 ventilates the bathroom 62 by, for example, sucking air in the bathroom 62 and blowing outside air into the bathroom 62. The ventilation device 64 is disposed on the ceiling of the bathroom 62, for example, and is controlled by the control unit 30. The control unit 30 operates the ventilator 64 when the bath water is sterilized by the liquid sterilizer 51. In addition, after the sterilization operation is finished, the ventilation device 64 is stopped. According to this configuration, even if the sterilizing gas leaks from the bathtub 63, the sterilizing gas in the bathroom 62 can be quickly discharged to the outside. It can prevent more reliably.

  Moreover, in this Embodiment, it is good also as a structure which performs the following control in the state which actuated the ventilation apparatus 64. FIG. In this control, when it is detected that the concentration of the sterilizing gas in the bathtub 63 is equal to or higher than the concentration determination value and the bathtub 63 is not closed by the lid body 4, the sterilization operation is stopped, and then the humidification is performed. The means 53 is operated, and the air ventilation amount (air flow rate) by the ventilation device 64 is increased. And when the density | concentration of the gas for sterilization in the bathtub 63 falls rather than the said density | concentration judgment value, the humidification means 53 and the ventilator 64 are stopped. In addition, you may perform determination of whether the bathtub 63 is obstruct | occluded based on the detected value of the brightness detection means 20 and the pressure detection means 21, as mentioned above. According to this control, for example, when the lid 4 is removed after the start of the sterilization operation, the amount of the sterilizing gas remaining in the bathtub 63 is reduced by the humidifying means 53 and the bathroom 62 is used by the ventilation device 64. The inside air can be efficiently ventilated. Thereby, the sterilizing gas can be diffused, and a bad odor, erroneous suction, etc. can be effectively prevented.

  In addition, in the said Embodiment 4, the case where the liquid sterilizer 1,41,51 was applied to the bathtub water sterilization system 61 provided with the ventilator 64 was illustrated. However, the present invention is not limited to this, and the liquid sterilizers 1, 41, 51 may be applied to a bathtub water sterilization system that does not include a ventilation device. In the present invention, the liquid sterilizer may be used to sterilize various liquids other than bath water.

1, 41, 51 Liquid sterilizer, 2 reservoir, 3 opening, 4 lid, 5 tank, 6 circulation passage, 7 circulation pump, 8 supply passage, 9 solenoid valve, 10 gas supply means, 11 gas generator, 12 Fine bubble generator, 12A fixed blade, 12B reduced diameter part, 12C gas introduction part, 13 solenoid valve, 20 brightness detection means (blocking state detection means), 21 pressure detection means (blocking state detection means), 30 control section ( Control means), 42 temperature detection means, cooling means 43, 52 concentration detection means, 53 humidification means, 61 bath water sterilization system, 62 bathroom, 63 bathtub (reservoir), 64 ventilator

Claims (8)

A reservoir having an opening and storing a liquid;
A lid that closes the opening of the reservoir;
A circulation passage for removing a part of the liquid stored in the storage section and returning it to the storage section;
A gas supply means for generating a sterilizing gas for sterilizing the liquid, and mixing the sterilizing gas with the liquid taken out from the reservoir to the circulation passage;
A closed state detecting means for detecting a closed state of the storage portion by the lid;
A control unit that has a function of driving and stopping the gas supply unit, and controls a supply state of the sterilizing gas supplied to the storage unit based on a detection result of the closed state detection unit;
Gas concentration detection means for detecting the concentration of the sterilizing gas present in the reservoir;
Humidifying means capable of humidifying the inside of the storage unit;
Equipped with a,
The control means drives the humidification means when it detects that the concentration of the sterilizing gas is equal to or higher than a predetermined concentration determination value and the lid is not closed by the lid. and liquid sterilization equipment. The closed state detection means includes brightness detection means for detecting brightness in the storage unit,
The liquid sterilizer according to claim 1, wherein the control unit is configured to stop the gas supply unit when the brightness detected by the brightness detection unit is equal to or greater than a preset brightness reference value. . The closed state detection means includes pressure detection means for detecting the presence of the lid as pressure,
3. The liquid sterilizer according to claim 1, wherein the control unit is configured to stop the gas supply unit when the pressure detected by the pressure detection unit is equal to or lower than a preset pressure reference value. The gas supply means includes a fine bubble generator connected to the circulation passage,
4. The microbubble generator according to claim 1, wherein the microbubble generator sucks the sterilizing gas and generates microbubbles of the sterilizing gas in the liquid returned from the circulation path to the storage unit. The liquid sterilizer according to item. Comprising a temperature detection means for detecting the temperature of the liquid taken out from the reservoir to the circulation passage;
5. The control unit according to claim 1, wherein the control unit is configured to stop the gas supply unit when the temperature detected by the temperature detection unit is equal to or higher than a preset temperature reference value. The liquid sterilizer described. A cooling means for cooling the liquid taken out from the reservoir to the circulation passage;
The control means, when the temperature detected by the temperature detection means is higher than the temperature reference value, to reduce the temperature of the liquid supplied to the storage unit below the temperature reference value by the cooling means, The liquid sterilizer according to claim 5. The liquid sterilizer according to any one of claims 1 to 6 is provided,
The reservoir is a bathtub that stores bathtub water as the liquid,
A bathtub water sterilization system configured to sterilize the bathtub water by mixing the sterilizing gas with the bathtub water taken out from the bathtub into the circulation passage. It has a ventilator that ventilates the air in the bathroom,
The bath water sterilization system according to claim 7 , wherein the ventilation device is activated when bath water is sterilized by the liquid sterilizer.

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