Space purification device

Abstract

This space purification device comprises: an electrolysis tank for mixing an electrolysis accelerator and water; a water supply unit for supplying water to the electrolysis tank; and an electrode unit (140) for generating hypochlorous acid water from the electrolysis accelerator and water mixed in the electrolysis tank. The space purification device further comprises: a first calculation unit (510) for calculating the concentration increase of the hypochlorous acid water per unit time; a second calculation unit (512) for calculating the required energization time for achieving a target hypochlorous acid water concentration; and an electrode control unit (540) for energizing the electrode unit (140) during the required energization time. When stoppage of the energization power supply occurs during the course of energization during the required energization time of the electrode unit (140), the electrode control unit (540) carries out, after the restoration of the power supply, a recovery energization for achieving the target hypochlorous acid water concentration.

Description

Space Purification Device

[0001] The present disclosure relates to a space purification device.

[0002] There is known an air purification device that generates and releases hypochlorous acid water by electrolysis to remove airborne bacteria, fungi, viruses, odors, etc. In conventional air purification devices, one cycle consists of an energized period during which electricity is applied for electrolysis and an unenergized period during which electricity is not applied, and hypochlorous acid water is generated by repeating this cycle (see Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2019-30396

[0004] Conventional space purification devices are equipped with a cycle counting unit that counts the number of times a cycle is repeated, and determine the amount of power during the power-on time, power-off time, and power-on time based on the increment in the count by the cycle counting unit.

[0005] However, in the conventional control, the concentration of hypochlorous acid water after the passage of the power supply time may not necessarily be the target concentration of hypochlorous acid water. Also, if a power outage or the like occurs during power supply and the power supply is stopped, the target concentration of hypochlorous acid water may not be achieved.

[0006] The present disclosure aims to provide a space purification device that can restore the hypochlorous acid water concentration to a target hypochlorous acid water concentration after power is restored, even if a power outage or the like occurs while power is being supplied.

[0007] The space purification device according to the present disclosure includes an electrolytic cell that mixes an electrolysis accelerator and water, a water supply unit that supplies water to the electrolytic cell, an electrode unit that generates hypochlorous acid water from the electrolysis accelerator and water mixed in the electrolytic cell, a first calculation unit that calculates an increased concentration of hypochlorous acid water per unit time based on a first sodium chloride concentration that is the sodium chloride concentration in the electrolytic cell after a change due to the addition of an electrolysis accelerator to the electrolytic cell and a predetermined hypochlorous acid generation efficiency per unit time, and a target hypochlorous acid water concentration in the electrolytic cell and a hypochlorous acid concentration in the electrolytic cell before the electrode unit is energized. The device is equipped with a second calculation unit that calculates the required current flow time to achieve the target hypochlorous acid water concentration based on the primary chlorous acid water concentration, which is the chlorous acid water concentration, and the increasing concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and an electrode control unit that supplies current to the electrode unit for the required current flow time calculated by the second calculation unit, and if the power supply for supplying current is interrupted while current is being supplied to the electrode unit for the required current flow time, the electrode control unit performs recovery current flow to achieve the target hypochlorous acid water concentration after the power supply is restored.

[0008] According to the present disclosure, it is possible to provide a space purification device that, even if a power outage or the like occurs while power is being supplied, can restore the hypochlorous acid water concentration to a target hypochlorous acid water concentration after power is restored.

[0009] FIG. 1 is a diagram showing the internal configuration of a space purification device according to embodiment 1. FIG. 2 is a schematic functional block diagram of a control unit according to embodiment 1. FIG. 3 is a flowchart showing a control procedure by the control unit according to embodiment 1. FIG. 4 is a diagram showing the internal configuration of a space purification device according to embodiment 2. FIG. 5 is a schematic functional block diagram of a control unit according to embodiment 2. FIG. 6 is a diagram showing an example of the data structure of a hypochlorous acid consumption amount table. FIG. 7 is a flowchart showing a control procedure by the control unit according to embodiment 2.

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, each embodiment shown below is an example to embody the technical idea of ​​the present disclosure, and the present disclosure is not limited to the following. In particular, unless otherwise specified, the numerical values, materials, shapes, relative positions, etc. described in each embodiment are merely examples and are not intended to limit the scope of the present disclosure.

[0011] First Embodiment First, a space purification device 1000 according to a first embodiment of the present disclosure will be described.

[0012] FIG. 1 is a diagram showing the internal configuration of the space purification device 1000. As shown in FIG.

[0013] The space purification device 1000 includes an electrolytic cell 100, a water supply unit 110, an electrolysis accelerator input unit 300, an electrode unit 140, an electrolytic water supply unit 120, a septic tank 200, an electrolytic cell full float 130, a septic tank full float 210, and a control unit 500.

[0014] The electrolytic bath 100 has a box shape with an open top and is structured to store water, and stores water supplied from a water supply unit 110, which will be described later. The electrolytic bath 100 is disposed, for example, in the lower part of the space purification device 1000.

[0015] The water supply unit 110 is a tank that stores water therein and is detachable from the electrolytic cell 100. A lid 112 is provided on an opening (not shown) of the water supply unit 110, and an opening / closing part (not shown) is provided in the center of the lid 112.

[0016] When the opening and closing part is opened, water from the water supply part 110 is supplied to the electrolytic cell 100. Specifically, when the water supply part 110 is attached to the electrolytic cell 100 with the opening of the water supply part 110 facing downwards, the opening and closing part opens. In other words, when the water supply part 110 containing water is attached to the electrolytic cell 100, the opening and closing part opens, water is supplied to the electrolytic cell 100, and the water accumulates in the electrolytic cell 100.

[0017] When the water level in electrolytic cell 100 rises and reaches the position of lid 112, the opening of water supply unit 110 is sealed with water, stopping the water supply. If water remains inside water supply unit 110, the water inside water supply unit 110 is supplied to electrolytic cell 100 whenever the water level in electrolytic cell 100 drops. As a result, the water level in electrolytic cell 100 is kept constant.

[0018] It should be noted that the water supply unit 110 does not have to be a tank for storing water. In some cases, tap water is used to supply water to the electrolytic cell 100. The water supply unit 110 may be configured to supply tap water when the water level in the electrolytic cell 100 drops until the water level in the electrolytic cell 100 rises to a predetermined level.

[0019] The electrolysis accelerator feed unit 300 is disposed above the electrolytic bath 100. The electrolysis accelerator feed unit 300 can be loaded with an electrolysis accelerator 310, and rotates a tablet feed member (not shown) when it receives an instruction from the control unit 500 to feed the electrolysis accelerator 310. When the tablet feed member rotates, the electrolysis accelerator 310 falls into the electrolytic bath 100.

[0020] The electrolysis accelerator feeding unit 300 counts the number of electrolysis accelerators 310 dropped into the electrolytic bath 100, and stops the rotation of the tablet feeding member when it determines that one tablet of electrolysis accelerator 310 has dropped into the electrolytic bath 100. In other words, the electrolysis accelerator feeding unit 300 feeds the electrolysis accelerator 310 into the electrolytic bath 100.

[0021] The electrolysis accelerator 310 is sodium chloride and is formed as an electrolysis accelerator tablet. The electrolysis accelerator 310 dissolves in the water in the electrolysis cell 100, thereby producing water containing chloride ions in the electrolysis cell 100. In other words, the electrolysis cell 100 mixes the electrolysis accelerator 310 with the water.

[0022] The electrode unit 140 is installed so as to be immersed in the water in the electrolytic cell 100. When a current is applied to the electrode unit 140, the electrode unit 140 electrochemically electrolyzes the water containing chloride ions in the electrolytic cell 100 to generate hypochlorous acid water (electrolyzed water).

[0023] The electrolytic water supply unit 120 includes a water supply pump 122 and a water supply pipe 124 .

[0024] The water supply pump 122 is disposed in the electrolytic bath 100 and is connected to the water supply pipe 124. When the water supply pump 122 operates in response to an instruction from the control unit 500, it pumps the hypochlorous acid water generated in the electrolytic bath 100 toward the water supply pipe 124.

[0025] The water supply pipe 124 is a pipe that connects the electrolytic cell 100 and the septic tank 200, and has a supply port 126 on the septic tank 200 side.

[0026] The hypochlorous acid water pumped up by the water supply pump 122 flows through the water supply pipe 124 and is supplied from the supply port 126 to the septic tank 200. In other words, the water supply pump 122, the water supply pipe 124, and the supply port 126 supply the hypochlorous acid water from the electrolytic cell 100 to the septic tank 200.

[0027] The septic tank 200 has a box shape with an open top, and stores hypochlorous acid water supplied from the electrolytic bath 100 by the electrolyzed water supply unit 120. In other words, the septic tank 200 stores hypochlorous acid water produced in the electrolytic bath 100.

[0028] The septic tank 200 is provided with a purifying unit 400. The purifying unit 400 includes a fan and a filter.

[0029] The fan is, for example, a sirocco fan, and rotates under the control of the control unit 500. As the fan rotates, air is sucked into the space purification device 1000 through an air intake provided in the housing of the space purification device 1000.

[0030] The filter is a component that brings the hypochlorous acid water stored in the septic tank 200 into contact with the indoor air that is introduced into the space purification device 1000 by the fan. The filter is cylindrical and has holes on its circumferential portion (the side surface of the circumference) that allow air to pass through.

[0031] The filter is built into the septic tank 200 in a configuration that allows it to rotate around a central axis so that one end of the filter can be immersed in the hypochlorous acid water stored in the septic tank 200 and retain water. The filter is rotated by a drive unit, causing continuous contact between the hypochlorous acid water and indoor air.

[0032] Here, an air passage extending from the air intake to the filter, fan, and air outlet is formed inside the space purification device 1000. When the fan rotates, the outside air is sucked in through the air intake and enters the air passage, and is blown out to the outside of the space purification device 1000 via the filter, fan, and air outlet in that order.

[0033] As a result, the air containing the hypochlorous acid water in the septic tank 200 is released to the outside. In other words, the purifier 400 purifies the space using the hypochlorous acid water stored in the septic tank 200.

[0034] Furthermore, the electrolytic cell 100 is provided with an electrolytic cell full float 130, and the septic tank 200 is provided with a septic tank full float 210. The electrolytic cell full float 130 and the septic tank full float 210 each detect whether water or hypochlorous acid water is present.

[0035] In the description herein, water, hypochlorous acid water, and a mixture of water and hypochlorous acid water may be collectively referred to as "water."

[0036] The electrolytic tank full float 130 and the septic tank full float 210 are collectively referred to as "floats." Each float has buoyancy and further has a magnet (not shown), and the position of the magnet is detected by a detection part (not shown).

[0037] When water reaches the float, the float moves to a predetermined position due to buoyancy, and the detection unit detects the magnet attached to the float. On the other hand, when water does not reach the float, the detection unit cannot detect the magnet attached to the float.

[0038] The electrolytic cell full float 130 detects whether the electrolytic cell 100 is full, and the septic tank full float 210 detects whether the septic tank 200 is full. Here, "full" does not have to mean a water volume (position) that is 100% of the capacity of the electrolytic cell 100, and may also mean a water volume that does not overflow even when water is added. Each float transmits its detection result to the control unit 500.

[0039] The control unit 500 receives detection results from the electrolytic tank full float 130 and the septic tank full float 210. The control unit 500 also controls the electrolyzed water supply unit 120, the electrode unit 140, the electrolysis accelerator injection unit 300, and the septic tank 400. The processing by the control unit 500 will be described in detail below.

[0040] Here, an example of the flow from the generation of hypochlorous acid water to its release will be described.

[0041] First, assume that there is no water in the electrolytic bath 100 and the septic tank 200. For example, the state where there is no water corresponds to the case where the space purification device 1000 is installed after being purchased, or after the water in the electrolytic bath 100 and the septic tank 200 is drained and maintenance such as cleaning is performed.

[0042] The user pours water into the water supply unit 110 and attaches the water supply unit 110 to the electrolytic cell 100. When the water supply unit 110 is attached to the electrolytic cell 100, the opening and closing portion of the lid 112 is opened, and water is supplied from the water supply unit 110 to the electrolytic cell 100.

[0043] Water is supplied until the opening of the water supply unit 110 is sealed with water. The state in which the opening of the water supply unit 110 is sealed with water is considered to be a full-water state. Alternatively, tap water may be supplied until the water level in the electrolytic cell 100 reaches a full-water state. Whether the electrolytic cell 100 is full with water can be determined from the detection result of the electrolytic cell full-water float 130.

[0044] The electrolysis accelerator feed unit 300 drops the electrolysis accelerator 310 into the electrolysis bath 100, and the submerged electrolysis accelerator 310 dissolves in water. As a result, the electrolysis bath 100 becomes filled with water containing chloride ions. The electrolysis accelerator 310 may be dropped by the user.

[0045] The control unit 500 electrolyzes water containing chloride ions by energizing the electrode unit 140 to generate hypochlorous acid water. At this time, the electrode unit 140 is energized for the energization time required to achieve the target hypochlorous acid water concentration. As a result, hypochlorous acid water having the target hypochlorous acid water concentration is generated. A method for calculating the energization time required to achieve the target hypochlorous acid water concentration will be described later.

[0046] When hypochlorous acid water having the target hypochlorous acid concentration is generated, the control unit 500 operates the water supply pump 122 to supply the hypochlorous acid water having the target hypochlorous acid concentration to the septic tank 200. As a result, the septic tank 200 becomes full of water.

[0047] Next, the control unit 500 operates the purification unit 400 to release the air that has been in contact with the hypochlorous acid water in the septic tank 200 to the outside of the space purification device 1000. By releasing the air that has been in contact with the hypochlorous acid water in the septic tank 200 to the outside of the space purification device 1000, the water level of the hypochlorous acid water in the septic tank 200 decreases over time.

[0048] Operation of the water supply pump 122 causes the level of hypochlorous acid water in the electrolytic cell 100 to drop. However, by opening the opening / closing part of the lid 112 of the water supply part 110, water is supplied from the water supply part 110 to the electrolytic cell 100, and the water level in the electrolytic cell 100 is maintained constant. When the water level in the electrolytic cell 100 drops, tap water may be supplied until the water level in the electrolytic cell 100 reaches a full level.

[0049] When water is supplied from the water supply unit 110 to the electrolytic cell 100, the hypochlorous acid water in the electrolytic cell 100 is diluted by the water supplied from the water supply unit 110, and the concentration of hypochlorous acid water in the electrolytic cell 100 becomes lower than the target concentration of hypochlorous acid water.

[0050] When the concentration of hypochlorous acid water in the electrolytic bath 100 becomes lower than the target concentration of hypochlorous acid water, the control unit 500 applies current to the electrode unit 140 to bring the concentration of hypochlorous acid water in the electrolytic bath 100 back to the target concentration of hypochlorous acid water. A method for calculating the current application time will be described later.

[0051] As described above, the level of hypochlorous acid water in the septic tank 200 decreases over time, so for example, a second supply of hypochlorous acid water is carried out a predetermined time after the first supply of hypochlorous acid water to the septic tank 200. This allows the space purification device 1000 to continue emitting air containing hypochlorous acid water.

[0052] Here, it is conceivable that a power outage or the like may occur while the control unit 500 is energizing the electrode unit 140 for the required time to achieve the target hypochlorous acid water concentration, and the power supply to the control unit 500 (space purification device 1000) may be stopped.

[0053] Thereafter, when the power supply to the control unit 500 is restored due to recovery from a power outage or the like, it is desirable to perform control again to accurately achieve the target hypochlorous acid water concentration.

[0054] The present disclosure aims to accurately adjust the concentration of hypochlorous acid water to the target concentration after power is restored even if a power outage occurs during power supply. The control content for achieving this purpose will be described below.

[0055] Referring to FIG. 2, the functions and control flow of the control unit 500 according to this embodiment will be described.

[0056] FIG. 2 is a schematic functional block diagram of the control unit 500 according to this embodiment.

[0057] The control unit 500 includes an electrolysis accelerator input control unit 560, a first calculation unit 510, a memory unit 570, a second calculation unit 512, an electrode control unit 540, a stoppage calculation unit 710, a first return calculation unit 720, a second return calculation unit 730, a third calculation unit 514, an electrolytic water supply control unit 550, a fourth calculation unit 516, a fifth calculation unit 518, a sixth calculation unit 520, and a first change unit 522.

[0058] The electrolysis accelerator supply control unit 560 controls the supply of the electrolysis accelerator 310 by the electrolysis accelerator supply unit 300 .

[0059] The first calculation unit 510 calculates the increased concentration of hypochlorous acid water per unit time based on the first sodium chloride concentration, which is the sodium chloride concentration in the electrolytic bath 100 after a change due to the addition of the electrolysis accelerator 310 to the electrolytic bath 100, and a predetermined hypochlorous acid generation efficiency per unit time.

[0060] The electrolysis accelerator 310 may be introduced into the electrolysis bath 100 by the electrolysis accelerator introduction unit 300 in response to an instruction from the electrolysis accelerator introduction control unit 560, or may be introduced by the user.

[0061] When the electrolysis promoter 310 is added by the electrolysis promoter adding unit 300, for example, the electrolysis promoter adding unit 300 transmits a notification that the addition has been completed to the control unit 500, and the control unit 500 receives this notification, thereby notifying the addition of the electrolysis promoter 310.

[0062] On the other hand, when the user adds the electrolysis promoter 310, the space purification device 1000 is provided with, for example, an addition completion button that the user presses when the addition is complete, and when the user presses the addition completion button, the control unit 500 detects that the button has been pressed.

[0063] Below, specific explanations will be given using numerical values, but the numerical values ​​are merely examples and other numerical values ​​may be used.

[0064] First, the first calculation unit 510 calculates a first sodium chloride concentration, which is the sodium chloride concentration in the electrolytic bath 100 after a change due to the addition of the electrolysis accelerator 310 to the electrolytic bath 100 .

[0065] When the electrolytic bath 100 and the septic tank 200 are empty of water and water is supplied from the water supply unit 110 to the electrolytic bath 100, making them full, the sodium chloride concentration is 0 mg / L (liters).

[0066] In this embodiment, assuming that the capacity of the electrolytic cell 100 is 1 L and the mass of the electrolysis accelerator 310 is 500 mg, the calculation formula is as follows:

[0067] First sodium chloride concentration after change due to introduction of electrolysis accelerator 310 into electrolytic cell 100 = mass of electrolysis accelerator 310 ÷ capacity of electrolytic cell 100 = 500 [mg] ÷ 1 [L] = 500 [mg / L] Here, the capacity of electrolytic cell 100 and the mass of electrolysis accelerator 310 are stored in advance in storage unit 570. Storage unit 570 is a so-called memory, and various values ​​are stored therein. In this embodiment, storage unit 570 is a non-volatile memory.

[0068] Next, the first calculation unit 510 acquires a predetermined hypochlorous acid generation efficiency per unit time from the storage unit 570. The hypochlorous acid generation efficiency per unit time is a value determined in advance by experiments or the like, and can be set arbitrarily.

[0069] The hypochlorous acid generation efficiency per unit time varies depending on the type of electrode of the electrode unit 140, the size of the electrode, the value of the current flowing through the electrode, etc. In the present embodiment, as an example, the hypochlorous acid generation efficiency per unit time is set to 1 [% / min] (min: minute (minute)).

[0070] Next, the first calculation unit 510 calculates the increased concentration of hypochlorous acid water per unit time using the following calculation formula:

[0071] Increased concentration of hypochlorous acid water per unit time = first sodium chloride concentration × hypochlorous acid generation efficiency per unit time = 500 [mg / L] × 1 [% / min] = 5 [mg / (L × min)] The second calculation unit 512 calculates the required current application time to achieve the target hypochlorous acid water concentration based on the target hypochlorous acid water concentration in the electrolytic cell 100, the first chlorous acid water concentration which is the hypochlorous acid water concentration in the electrolytic cell 100 before current is applied by the electrode unit 140, and the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510.

[0072] Specifically, first, the second calculation unit 512 acquires the target concentration of hypochlorous acid water in the electrolytic bath 100 from the storage unit 570. In this embodiment, the target concentration of hypochlorous acid water is set to 10 ppm (ppm: parts per million).

[0073] The target hypochlorous acid water concentration may be changeable by the user. For example, the user may set the target hypochlorous acid water concentration on a remote controller (not shown), and the control unit 500 may acquire the set target hypochlorous acid water concentration and rewrite the target hypochlorous acid water concentration in the memory unit 570 to the target hypochlorous acid water concentration set by the user.

[0074] Next, the second calculation unit 512 determines the primary chlorous acid water concentration, which is the concentration of hypochlorous acid water in the electrolytic cell 100 before current is applied by the electrode unit 140. Initially, the electrolytic cell 100 is full of water and no hypochlorous acid is present in the water in the electrolytic cell 100, so the second calculation unit 512 determines the primary chlorous acid water concentration to be 0 ppm.

[0075] Next, the second calculation unit 512 calculates the current application time required to achieve the target concentration of hypochlorous acid water. The calculation formula is as follows.

[0076] Required current application time = (target hypochlorous acid water concentration - hypochlorous acid water concentration before current application) ÷ increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510 = (10 [ppm] - 0 [ppm]) ÷ 5 [mg / (L × min)] = 2 [min] The electrode control unit 540 applies current to the electrode unit 140 for the required current application time calculated by the second calculation unit 512. Specifically, the electrode control unit 540 applies current to the electrode unit 140 for 2 [min], which is the required current application time calculated by the second calculation unit 512.

[0077] This allows hypochlorous acid water having a target hypochlorous acid water concentration to be produced in the electrolytic cell 100. As can be seen from the above description, the first sodium chloride concentration can also be said to be the sodium chloride concentration in the electrolytic cell 100 before current is applied.

[0078] Furthermore, if the power supply for energizing is interrupted while the electrode unit 140 is being energized for the required energization time, the electrode control unit 540 will restore the power supply to achieve the target hypochlorous acid water concentration after the power supply is restored.

[0079] Here, the space purification device 1000 includes a charge storage unit 700 that stores electric charges. The charge storage unit 700 is a capacitor such as an electrolytic capacitor, a battery, a button cell, or the like that can store electric charges.

[0080] An AC power supply such as AC 100V is supplied to the space purification device 1000 via an outlet and a power cable. The AC power supply is converted into a DC power supply by a power supply circuit within the space purification device 1000, and the converted DC power supply is supplied to the control unit 500.

[0081] For example, the charge storage unit 700 is connected as a capacitor between the DC power supply supplied to the control unit 500 and ground (GND). In this case, even if the supply of AC power is stopped due to a power outage or the like, the charge stored in the capacitor can supply power to the control unit 500 for a certain period of time.

[0082] The charge storage unit 700 may also be a battery (button battery) connected to the control unit 500. In this case, a DC power supply and the battery are connected in parallel to the control unit 500. However, in order to supply power to the control unit 500 from the DC power supply when there is no power outage, the battery voltage is set to a voltage that allows the control unit 500 to operate and is lower than the DC power supply voltage. Also, a backflow prevention diode is provided to prevent current from flowing from the DC power supply to the battery.

[0083] Note that the charge storage unit 700 is capable of storing a small amount of charge, and therefore is not suitable as a power source for energizing the electrode unit 140. To energize the electrode unit 140, a power supply from an AC power source, a DC power source, or the like is required. In other words, the power supply for energizing is the power supply for energizing the electrode unit 140, such as the AC power supply supplied to the space purification device via an outlet. When a power outage occurs, the power supply from the AC power source stops.

[0084] In this embodiment, the charge storage unit 700 is described as a capacitor. When the power supply for energizing is stopped due to a power outage or the like, the charge storage unit 700 can supply power to the control unit 500 for a certain period of time.

[0085] The stoppage calculation unit 710 calculates the stoppage hypochlorous acid water concentration, which is the hypochlorous acid water concentration at the time when the power supply for energizing is stopped due to a power outage or the like, and the stoppage sodium chloride concentration, which is the sodium chloride concentration at the time when the power supply for energizing is stopped due to a power outage or the like.

[0086] When the power supply for energizing is stopped due to a power outage or the like, power is supplied for a certain period of time from the charge storage unit 700 to the stoppage calculation unit 710. The stoppage calculation unit 710 uses the power supplied by the charge storage unit 700 to calculate the stoppage hypochlorous acid water concentration and the stoppage sodium chloride concentration.

[0087] Any method may be used to determine that the power supply for energizing has been stopped due to a power outage, etc. For example, the control unit 500 determines that the power supply for energizing has been stopped due to a power outage, etc., when there is no change in the input voltage from the AC power supply having a frequency of 50 Hz or 60 Hz.

[0088] In another example, the control unit 500 monitors the voltage value of the DC power supply, and if the voltage value of the DC power supply is less than a predetermined voltage value, determines that the power supply for energizing has been stopped due to a power outage or the like.

[0089] First, a method for calculating the concentration of hypochlorous acid water at the time of shutdown by the shutdown calculation unit 710 will be described.

[0090] The stop-time calculation unit 710 calculates the stop-time hypochlorous acid water concentration based on the primary hypochlorous acid water concentration, the increased hypochlorous acid water concentration per unit time calculated by the first calculation unit 510, and the required current flow time from the start of current flow to the stop of current flow.

[0091] In this embodiment, as an example, assume that a power outage or the like occurs and the power supply for energizing is stopped 1 minute after the start of energizing, during the required energizing time of 2 minutes.

[0092] In this case, the stop calculation unit 710 calculates the stop hypochlorous acid water concentration based on the primary chlorous acid water concentration = 0 [ppm], the increase in hypochlorous acid water concentration per unit time calculated by the first calculation unit 510 = 5 [mg / (L × min)], and the current flow time from the start of current flow to the stop of current flow = 1 [min]. The calculation formula is as follows.

[0093] Hypochlorous acid water concentration at shutdown = primary chlorous acid water concentration + (hypochlorous acid water increase concentration per unit time calculated by the first calculation unit 510 × power supply time from start of power supply to power supply stop) = 0 [ppm] + (5 [mg / (L × min)] × 1 [min]) = 5 [mg / L] In this embodiment, [mg / L] = [ppm].

[0094] This makes it possible to know the concentration of hypochlorous acid water in the electrolytic cell 100 at the time when the power supply for energizing is stopped. The hypochlorous acid water concentration at the time of stoppage calculated by the stoppage calculation unit 710 is stored in the memory unit 570.

[0095] Next, a method for calculating the sodium chloride concentration at the time of shutdown by the shutdown calculation unit 710 will be described.

[0096] The stoppage calculation unit 710 calculates the stoppage sodium chloride concentration based on the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510, and the required current flow time from the start of current flow to the stop of current flow.

[0097] In this embodiment, the stoppage calculation unit 710 calculates the stoppage sodium chloride concentration based on the first sodium chloride concentration = 500 [mg / L], the increase in hypochlorous acid water concentration per unit time calculated by the first calculation unit 510 = 5 [mg / (L × min)], and the current flow time from the start of current flow to the stop of current flow = 1 [min]. The calculation formula is as follows.

[0098] Sodium chloride concentration at shutdown = first sodium chloride concentration - (increased concentration of hypochlorous acid water per unit time calculated by first calculation unit 510 x duration of current flow from start to stop) = 500 [mg / L] - (5 [mg / (L x min)] x 1 [min]) = 495 [mg / L] This makes it possible to determine the sodium chloride concentration in electrolytic cell 100 at the time when the power supply for current flow was stopped. The sodium chloride concentration at shutdown calculated by shutdown calculation unit 710 is stored in memory unit 570.

[0099] As can be seen from the above description, the charge storage unit 700 can also be considered a charge storage component that supplies power to the stoppage calculation unit 710 and the memory unit 570 when the power supply for energizing is stopped.

[0100] In this embodiment, since the memory unit 570 is a non-volatile memory, even if the power supply to the memory unit 570 by the charge storage unit 700 is cut off, various values ​​such as the hypochlorous acid water concentration at the time of shutdown and the sodium chloride concentration at the time of shutdown remain stored in the memory unit 570.

[0101] When the power supply for energizing is restored, the first recovery calculation unit 720 calculates the increased concentration of hypochlorous acid water at recovery per unit time based on the sodium chloride concentration at shutdown and the predetermined hypochlorous acid generation efficiency per unit time stored in the memory unit 570.

[0102] The increase in hypochlorous acid water concentration per unit time upon recovery refers to the increase in hypochlorous acid water concentration per unit time when current is passed through the electrode unit 140 at the time when the power supply for passing current is restored.

[0103] Specifically, first, the first return calculation unit 720 acquires the sodium chloride concentration at the time of shutdown and a preset hypochlorous acid generation efficiency per unit time from the storage unit 570. In this embodiment, the first return calculation unit 720 acquires the sodium chloride concentration at the time of shutdown = 495 [mg / L] and the preset hypochlorous acid generation efficiency per unit time = 1 [% / min] from the storage unit 570.

[0104] Next, the first recovery calculation unit 720 calculates the recovery-time increased concentration of hypochlorous acid water per unit time using the following calculation formula.

[0105] Increased concentration of hypochlorous acid water at restoration per unit time = sodium chloride concentration at shutdown × hypochlorous acid generation efficiency per unit time = 495 [mg / L] × 1 [% / min] = 4.95 [mg / (L × min)] The second restoration calculation unit 730 calculates the restoration current application time, which is the power application time required to achieve the target hypochlorous acid water concentration after the power supply for power application is restored, based on the target hypochlorous acid water concentration of the electrolytic cell 100, the hypochlorous acid water concentration at shutdown stored in the memory unit 570, and the increased concentration of hypochlorous acid water at restoration per unit time calculated by the first restoration calculation unit 720.

[0106] First, the second return calculation unit 730 acquires the target hypochlorous acid water concentration of the electrolytic cell 100, the hypochlorous acid water concentration at shutdown stored in the memory unit 570, and the increased concentration of hypochlorous acid water at restoration per unit time calculated by the first return calculation unit 720. In this embodiment, the following are acquired: target hypochlorous acid water concentration = 10 [ppm], hypochlorous acid water concentration at shutdown = 5 [mg / L] = 5 [ppm], and increased concentration of hypochlorous acid water per unit time at restoration = 4.95 [mg / (L × min)].

[0107] Next, the second recovery calculation unit 730 calculates the recovery power supply time using the following formula:

[0108] Restoration current supply time = (target hypochlorous acid water concentration - hypochlorous acid water concentration at stop) ÷ restoration hypochlorous acid water increase concentration per unit time calculated by the first restoration calculation unit 720 = (10 [ppm] - 5 [ppm]) ÷ 4.95 [mg / (L × min)] = 1.01 [min] When the power supply for energizing is restored, the electrode control unit 540 energizes the electrode unit 140 for the restoration current supply time calculated by the second restoration calculation unit 730. Specifically, the electrode control unit 540 energizes for 1.01 [min], which is the restoration current supply time calculated by the second restoration calculation unit 730.

[0109] As a result, even if the power supply for energizing is interrupted, hypochlorous acid water having the target hypochlorous acid water concentration can be accurately produced in the electrolytic cell 100 after the power supply for energizing is restored.

[0110] The third calculation unit 514 calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 (which can also be said to be after return current is passed or after current is completed), based on the sodium chloride concentration at the time of shutdown, the increased concentration of hypochlorous acid water at the time of recovery per unit time calculated by the first recovery calculation unit 720, and the recovery current application time calculated by the second recovery calculation unit 730.

[0111] The sodium chloride concentration in electrolytic cell 100 after energization (after energization return) is lower than the sodium chloride concentration in electrolytic cell 100 before energization return. Note that the sodium chloride concentration in electrolytic cell 100 before energization return refers to the sodium chloride concentration at the time of shutdown.

[0112] Specifically, the third calculation unit 514 first acquires the sodium chloride concentration at shutdown, the increased concentration of hypochlorous acid water per unit time at restoration, and the restoration power supply time. In this embodiment, the sodium chloride concentration at shutdown = 495 [mg / L], the increased concentration of hypochlorous acid water per unit time at restoration = 4.95 [mg / (L × min)], and the restoration power supply time = 1.01 [min] are acquired.

[0113] Next, the third calculation unit 514 calculates the second sodium chloride concentration using the following formula:

[0114] Second sodium chloride concentration = sodium chloride concentration at shutdown - (increased concentration of hypochlorous acid water at restoration per unit time x restoration power supply time) = 495 [mg / L] - (4.95 [mg / (L x min)] x 1.01 [min]) = 490.0005 [mg / L] This makes it possible to grasp the sodium chloride concentration in the electrolytic cell 100 after power is supplied to the electrode unit 140 (after restoration power supply).

[0115] In this embodiment, for ease of understanding, the second sodium chloride concentration is set to 490 mg / L. Of course, the following calculations may be performed with the second sodium chloride concentration set to 490.0005 mg / L.

[0116] The electrolyzed water supply control unit 550 supplies hypochlorous acid water to the septic tank 200 using the electrolyzed water supply unit 120. Specifically, the electrolyzed water supply unit 120 supplies hypochlorous acid water until the septic tank 200 is full. Whether the septic tank 200 is full can be determined based on the detection result of the septic tank full float 210.

[0117] The fourth calculation unit 516 calculates the amount of hypochlorous acid water supplied by the electrolyzed water supply unit 120.

[0118] In this embodiment, as an example, it is assumed that the time it takes for the electrolyzed water supply unit 120 to supply water until the septic tank 200 is full is 5 seconds. The amount of water supplied per unit time is 50 mL / s. The amount of water supplied per unit time is a value determined in advance through experiments or the like, and varies depending on the water supply capacity of the electrolyzed water supply unit 120. The amount of water supplied per unit time is stored in the memory unit 570.

[0119] The fourth calculation unit 516 calculates the amount of hypochlorous acid water to be fed using the following formula:

[0120] Amount of hypochlorous acid water fed = Amount of water fed per unit time × Water feed time = 50 [mL / s] × 5 [s] = 250 [mL] The fifth calculation unit 518 calculates the third sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after the electrolytic water is fed by the electrolytic water supply unit 120, based on the second sodium chloride concentration calculated by the third calculation unit 514, the amount of hypochlorous acid water fed calculated by the fourth calculation unit 516, and the capacity of the electrolytic cell 100.

[0121] The sodium chloride concentration in the electrolytic cell 100 after the electrolytic water is fed is lower than the sodium chloride concentration in the electrolytic cell 100 before the electrolytic water is fed, due to the water supplied by the water supply unit 110.

[0122] Specifically, first, the fifth calculation unit 518 acquires the second sodium chloride concentration calculated by the third calculation unit 514, the hypochlorous acid water feed rate calculated by the fourth calculation unit 516, and the capacity of the electrolytic cell 100. In the present embodiment, the fifth calculation unit 518 acquires the second sodium chloride concentration = 490 [mg / L] calculated by the third calculation unit 514, the hypochlorous acid water feed rate = 250 [mL] calculated by the fourth calculation unit 516, and the capacity of the electrolytic cell = 1 [L].

[0123] Next, the fifth calculation unit 518 calculates the third sodium chloride concentration using the following formula:

[0124] Third sodium chloride concentration = Second sodium chloride concentration - (Second sodium chloride concentration × (Amount of hypochlorous acid water supplied ÷ Capacity of electrolytic cell 100)) = 490 [mg / L] - (490 [mg / L] × (250 [mL] ÷ 1000 [mL])) = 367.5 [mg / L] This makes it possible to determine the sodium chloride concentration in the electrolytic cell 100 after electrolyzed water is supplied by the electrolyzed water supply unit 120.

[0125] The sixth calculation unit 520 calculates the secondary chlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell 100 after the hypochlorous acid water is supplied by the electrolytic water supply unit 120, based on the target hypochlorous acid water concentration, the amount of hypochlorous acid water supplied calculated by the fourth calculation unit 516, and the capacity of the electrolytic cell 100.

[0126] The concentration of hypochlorous acid water in the electrolytic cell 100 after the hypochlorous acid water is fed is lower than the concentration of hypochlorous acid water in the electrolytic cell 100 before the hypochlorous acid water is fed (target hypochlorous acid water concentration) due to the water supplied by the water supply unit 110.

[0127] Specifically, first, the sixth calculation unit 520 acquires the target hypochlorous acid water concentration, the hypochlorous acid water feed rate calculated by the fourth calculation unit 516, and the capacity of the electrolytic cell 100. In the present embodiment, the sixth calculation unit 520 acquires the target hypochlorous acid water concentration = 10 [ppm], the hypochlorous acid water feed rate = 250 [mL] calculated by the fourth calculation unit 516, and the capacity of the electrolytic cell 100 = 1 [L].

[0128] Next, the sixth calculation unit 520 calculates the concentration of the secondary chlorous acid water using the following calculation formula:

[0129] Secondary chlorous acid water concentration = target hypochlorous acid water concentration - (target hypochlorous acid water concentration x (hypochlorous acid water supply amount ÷ capacity of electrolytic cell 100)) = 10 [ppm] - (10 [ppm] x (250 [mL] ÷ 1000 [mL])) = 7.5 [ppm] This makes it possible to determine the hypochlorous acid water concentration in electrolytic cell 100 after hypochlorous acid water has been supplied.

[0130] The first change unit 522 changes the first sodium chloride concentration used in the calculation by the first calculation unit 510 to the third sodium chloride concentration calculated by the fifth calculation unit 518, and changes the first chlorous acid water concentration used in the calculation by the second calculation unit 512 to the second chlorous acid water concentration calculated by the sixth calculation unit 520.

[0131] Specifically, first, the first changing unit 522 acquires the pre-change first sodium chloride concentration and the pre-change primary chlorous acid water concentration. The pre-change first sodium chloride concentration and the pre-change primary chlorous acid water concentration are stored in the memory unit 570 by, for example, the first calculating unit 510 or the second calculating unit 512. In this embodiment, the first changing unit 522 acquires the pre-change first sodium chloride concentration = 500 [mg / L] and the pre-change primary chlorous acid water concentration = 0 [ppm].

[0132] The first change unit 522 changes the first sodium chloride concentration before the change = 500 [mg / L] to the third sodium chloride concentration calculated by the fifth calculation unit 518 = 367.5 [mg / L], and changes the first chlorous acid water concentration before the change = 0 [ppm] to the second chlorous acid water concentration = 7.5 [ppm] calculated by the sixth calculation unit.

[0133] In other words, the first change unit 522 updates the first sodium chloride concentration to the latest sodium chloride concentration of the electrolytic bath 100 and updates the first hypochlorous acid water concentration to the latest hypochlorous acid water concentration of the electrolytic bath 100.

[0134] The first calculation unit 510 calculates a new increased concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration (changed first sodium chloride concentration) changed by the first change unit 522 and the predetermined hypochlorous acid generation efficiency per unit time.

[0135] Specifically, first, the first calculation unit 510 acquires the changed first sodium chloride concentration and a preset hypochlorous acid generation efficiency per unit time. In the present embodiment, the first calculation unit 510 acquires the changed first sodium chloride concentration = 367.5 [mg / L] and the preset hypochlorous acid generation efficiency per unit time = 1 [% / min].

[0136] Next, the first calculation unit 510 calculates the new increase in concentration of hypochlorous acid water per unit time using the following specific calculation formula:

[0137] New increase in concentration of hypochlorous acid water per unit time = changed first sodium chloride concentration × hypochlorous acid generation efficiency per unit time = 367.5 [mg / L] × 1 [% / min] = 3.675 [mg / (L × min)] The second calculation unit 512 calculates a new required current application time for the electrode unit 140 based on the target hypochlorous acid water concentration of the electrolytic cell 100, the new primary chlorous acid water concentration (changed primary chlorous acid water concentration) changed by the first change unit 522, and the new increase in concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510.

[0138] Specifically, first, the second calculation unit 512 acquires the target hypochlorous acid water concentration of the electrolytic bath 100, the changed primary chlorous acid water concentration, and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510. In this embodiment, the second calculation unit 512 acquires the target hypochlorous acid water concentration of the electrolytic bath 100 = 10 [ppm], the changed primary chlorous acid water concentration = 7.5 [ppm], and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510 = 3.675 [mg / (L × min)].

[0139] Next, the second calculation unit 512 calculates the new required current application time using the following specific calculation formula:

[0140] New required current flow time = (target hypochlorous acid water concentration - changed primary hypochlorous acid water concentration) ÷ new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510 = (10 [ppm] - 7.5 [ppm]) ÷ 3.675 [mg / (L × min)] = 0.68 [min] The electrode control unit 540 applies current to the electrode unit 140 for the new required current flow time calculated by the second calculation unit 512. In this embodiment, the electrode control unit 540 applies current to the electrode unit 140 for the new required current flow time = 0.68 [min]. This allows the electrolytic cell 100 to again generate hypochlorous acid water with the target hypochlorous acid water concentration.

[0141] Thereafter, the control unit 500 repeats the following steps: changing the first sodium chloride concentration and the first chlorous acid water concentration by the first changing unit 522; calculating a new increased concentration of hypochlorous acid water per unit time by the first calculating unit 510; calculating a new required current-flow time by the second calculating unit 512; and controlling current flow for the new required current-flow time by the electrode control unit 540. This allows the hypochlorous acid water concentration in the electrolytic cell 100 to be continuously kept at the target hypochlorous acid water concentration.

[0142] Note that each functional block of the control unit 500 can be realized in terms of hardware by elements such as a computer's CPU (Central Processing Unit) and mechanical devices, and in terms of software by a computer program, etc., but the example in Figure 2 depicts functional blocks realized by the cooperation of these. Therefore, these functional blocks can be realized in various ways by combining hardware and software.

[0143] Next, the control performed by the control unit 500 having the above configuration will be described.

[0144] FIG. 3 is a flowchart showing the control by the control unit 500 according to this embodiment.

[0145] First, the first calculation unit 510 calculates the increasing concentration of hypochlorous acid water per unit time (S10).

[0146] The second calculation unit 512 calculates the current application time required to achieve the target hypochlorous acid water concentration (S12).

[0147] The electrode control unit 540 starts energizing the electrode unit 140 for the required energization time calculated by the second calculation unit 512 (S14).

[0148] As a result, after the required energization time has elapsed, hypochlorous acid water having the target hypochlorous acid water concentration can be produced in the electrolytic cell 100.

[0149] Here, if the power supply for energizing is interrupted while the electrode control unit 540 is energizing the electrode unit 140 for the required energization time, the electrode control unit 540 will restore the power supply to achieve the target hypochlorous acid water concentration after the power supply is restored.

[0150] First, when the control unit 500 determines that the power supply for energizing has been stopped due to a power outage or the like (S16), the stoppage calculation unit 710 calculates the stoppage hypochlorous acid water concentration and the stoppage sodium chloride concentration (S18).

[0151] This makes it possible to determine the concentration of hypochlorous acid water and sodium chloride in the electrolytic cell 100 at the time when the power supply to the electrode unit 140 is stopped.

[0152] The first recovery calculation unit 720 calculates the increased concentration of hypochlorous acid water per unit time upon recovery when the power supply for energizing is restored (S20).

[0153] The second recovery calculation unit 730 calculates the recovery power supply time (S22).

[0154] The electrode control unit 540 energizes the electrode unit 140 during the recovery energization time (S24).

[0155] This allows the electrolytic cell 100 to produce hypochlorous acid water with a target hypochlorous acid water concentration.

[0156] The third calculation unit 514 calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 (after the return current is passed) (S26).

[0157] This makes it possible to grasp the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 .

[0158] In addition, if the power supply for energizing the electrode unit 140 is not interrupted during the required energization time, the third calculation unit 514 calculates the sodium chloride concentration in the electrolytic cell 100 after the electrode unit 140 has been energized for the required energization time as the second sodium chloride concentration.

[0159] The calculation method in this case will be described below. The third calculation unit 514 calculates the sodium chloride concentration (second sodium chloride concentration) in the electrolytic cell 100 after energization by the electrode unit 140, based on the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510, and the required energization time calculated by the second calculation unit 512.

[0160] The sodium chloride concentration in the electrolytic cell 100 after energization is lower than the sodium chloride concentration in the electrolytic cell 100 before energization.

[0161] Specifically, first, the third calculation unit 514 acquires the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time, and the required power supply time.

[0162] Next, the third calculation unit 514 calculates the second sodium chloride concentration. The calculation formula is "second sodium chloride concentration = first sodium chloride concentration - (increase in concentration of hypochlorous acid water per unit time x required current application time)". This makes it possible to determine the sodium chloride concentration in the electrolytic cell 100 after current is applied by the electrode unit 140.

[0163] In other words, the method by which the third calculation unit 514 calculates the "sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140" differs depending on whether or not the power supply for passing current is interrupted while current is being passed through the electrode unit 140 for the required current passing time.

[0164] In other words, the third calculation unit 514 uses different calculation methods for the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 depending on whether or not the power supply for passing current is interrupted while current is being passed through the electrode unit 140 for the required current passing time.

[0165] This concludes the explanation of the method for calculating the second sodium chloride concentration by the third calculation unit 514 when the power supply for energizing the electrode unit 140 is not interrupted during the required energization time.

[0166] 3, the electrolyzed water supply control unit 550 supplies hypochlorous acid water to the septic tank 200 using the electrolyzed water supply unit 120 until the septic tank 200 is filled with water (S28). This allows hypochlorous acid water at a target hypochlorous acid concentration to be supplied to the septic tank 200.

[0167] The fourth calculation unit 516 calculates the amount of hypochlorous acid water supplied by the electrolyzed water supply unit 120 (S30).

[0168] The fifth calculation unit 518 calculates the third sodium chloride concentration, which is the sodium chloride concentration in the electrolytic bath 100 after the electrolytic water supply unit 120 has supplied the electrolytic water (S32).

[0169] This makes it possible to grasp the sodium chloride concentration in the electrolytic cell 100 after the electrolytic water supply unit 120 has supplied the electrolytic water.

[0170] The sixth calculation unit 520 calculates the secondary chlorous acid water concentration, which is the concentration of hypochlorous acid water in the electrolytic bath 100 after the electrolytic water supply unit 120 has supplied the hypochlorous acid water (S34).

[0171] This makes it possible to grasp the concentration of hypochlorous acid water in the electrolytic cell 100 after the hypochlorous acid water has been fed.

[0172] The first change unit 522 changes the first sodium chloride concentration to the third sodium chloride concentration calculated by the fifth calculation unit 518, and changes the first chlorous acid water concentration to the second chlorous acid water concentration calculated by the sixth calculation unit 520 (S36).

[0173] The first calculation unit 510 calculates a new increased concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration changed by the first change unit 522 and the predetermined hypochlorous acid generation efficiency per unit time (S38).

[0174] The second calculation unit 512 calculates the new required current application time for the electrode unit 140 based on the target hypochlorous acid water concentration of the electrolytic cell 100, the new primary hypochlorous acid water concentration changed by the first change unit 522, and the new increased concentration of hypochlorous acid water per unit time (S40).

[0175] The electrode control unit 540 energizes the electrode unit 140 for the new required energization time calculated by the second calculation unit 512 (S42).

[0176] This allows the electrolytic cell 100 to generate hypochlorous acid water with the target hypochlorous acid water concentration again.

[0177] Second Embodiment Next, a second embodiment of the present disclosure will be described.

[0178] The second embodiment will be described with reference to FIG. 4, focusing on the differences from the first embodiment.

[0179] FIG. 4 is a diagram showing the internal configuration of the space purification device 2000 according to the second embodiment.

[0180] The space purification device 2000 has a partial structure different from that of the space purification device 1000. The differences between the space purification device 2000 and the space purification device 1000 will be described below.

[0181] The space purification device 2000 does not have the electrolytic water supply unit 120, the septic tank 200, and the septic tank full float 210 of the space purification device 1000, and the control unit 500 has been changed to a control unit 600.

[0182] Furthermore, in the space purification device 1000, the purification tank 200 is provided with the purification unit 400, but in the space purification device 2000, the electrolytic bath 100 is provided with the purification unit 401.

[0183] That is, the spatial purification device 2000 includes an electrolytic cell 100 , a water supply unit 110 , an electrolysis accelerator supply unit 300 , an electrode unit 140 , an electrolytic cell full float 130 , and a control unit 600 .

[0184] The electrolytic cell 100, water supply unit 110, electrolysis accelerator feeding unit 300, and electrode unit 140 each have the same configuration as in embodiment 1. However, the electrolysis accelerator feeding unit 300 differs from embodiment 1 in that it rotates the tablet feeding member when it receives an instruction to feed the electrolysis accelerator 310 from the control unit 600, not the control unit 500.

[0185] The electrolytic cell 100 is provided with a purification unit 401. The purification unit 401 includes a fan and a filter.

[0186] The fan rotates under the control of the control unit 600. As the fan rotates, air is sucked into the space purification device 2000 through an air intake provided in the housing of the space purification device 2000.

[0187] The filter is a member that brings the hypochlorous acid water stored in the electrolytic cell 100 into contact with the indoor air that is flowed into the space purification device 2000 by the fan. The filter is cylindrical and has holes on the circumferential part (side part of the cylinder) that allow air to flow through.

[0188] The filter is built into the electrolytic cell 100 in a configuration that allows it to rotate around a central axis so that one end of the filter can be immersed in and retain water in the hypochlorous acid water stored in the electrolytic cell 100. The filter is rotated by a drive unit, and the hypochlorous acid water and indoor air are continuously brought into contact with each other.

[0189] Here, an air passage extending from the air intake to the filter, fan, and air outlet is formed inside the space purification device 2000. When the fan rotates, outside air is sucked in through the air intake and enters the air passage, and is blown out to the outside of the space purification device 2000 via the filter, fan, and air outlet in that order.

[0190] As a result, the air containing the hypochlorous acid water in the electrolytic cell 100 is released to the outside. In other words, the purifying unit 401 purifies the space using the hypochlorous acid water stored in the electrolytic cell 100.

[0191] The electrolytic cell full float 130 provided in the electrolytic cell 100 is the same as that in embodiment 1. The electrolytic cell full float 130 transmits the detection result to the control unit 600.

[0192] The control unit 600 receives the detection result from the electrolytic cell full float 130. The control unit 600 also controls the electrode unit 140, the electrolysis accelerator supply unit 300, and the purification unit 401. The processing by the control unit 600 will be described in detail later.

[0193] Here, an example of the flow from generation to release of hypochlorous acid water in the second embodiment will be described.

[0194] First, assume that there is no water in the electrolytic bath 100. For example, the state where there is no water corresponds to the case where the space purification device 2000 is installed after being purchased, or after the water in the electrolytic bath 100 is drained and maintenance such as cleaning is performed.

[0195] The user fills the water supply unit 110 with water and attaches the water supply unit 110 to the electrolytic cell 100 .

[0196] When the water supply unit 110 is attached to the electrolytic cell 100, water is supplied from the water supply unit 110 to the electrolytic cell 100. Water is supplied until the opening of the water supply unit 110 is sealed with water. The state in which the opening of the water supply unit 110 is sealed with water is the full water state. It is also possible to supply tap water until the water level in the electrolytic cell 100 reaches the full water state.

[0197] The electrolysis accelerator feed unit 300 drops the electrolysis accelerator 310 into the electrolysis bath 100, and the submerged electrolysis accelerator 310 dissolves in water. As a result, the electrolysis bath 100 becomes filled with water containing chloride ions. The electrolysis accelerator 310 may be dropped by the user.

[0198] The control unit 600 electrolyzes water containing chloride ions by energizing the electrode unit 140 to generate hypochlorous acid water. At this time, electricity is applied to the electrode unit 140 for the energization time required to achieve the target hypochlorous acid water concentration. As a result, hypochlorous acid water having the target hypochlorous acid water concentration is generated. A method for calculating the energization time required to achieve the target hypochlorous acid water concentration will be described later.

[0199] The control unit 600 operates the purification unit 401 to release the air that has been in contact with the hypochlorous acid water in the electrolytic cell 100 to the outside of the space purification device 2000. By releasing the air that has been in contact with the hypochlorous acid water in the electrolytic cell 100 to the outside of the space purification device 2000, the level of the hypochlorous acid water in the electrolytic cell 100 decreases over time. However, by opening the opening / closing unit of the lid 112 of the water supply unit 110, water is supplied from the water supply unit 110 to the electrolytic cell 100, and the water level in the electrolytic cell 100 is maintained constant. Note that when the water level in the electrolytic cell 100 drops, tap water may be supplied until the water level in the electrolytic cell 100 reaches a full level.

[0200] Here, when water is supplied from the water supply unit 110 to the electrolytic cell 100, the hypochlorous acid water in the electrolytic cell 100 is diluted by the water supplied from the water supply unit 110, and the concentration of hypochlorous acid water in the electrolytic cell 100 becomes lower than the target concentration of hypochlorous acid water.

[0201] When the concentration of hypochlorous acid water in the electrolytic bath 100 becomes lower than the target concentration of hypochlorous acid water, the control unit 600 applies current to the electrode unit 140 to bring the concentration of hypochlorous acid water in the electrolytic bath 100 to the target concentration of hypochlorous acid water. A method for calculating the current application time will be described later. This allows the space purification device 2000 to continue emitting air containing hypochlorous acid water.

[0202] As in embodiment 1, a power outage or the like may occur while the control unit 600 is energizing the electrode unit 140 for the required energization time to achieve the target hypochlorous acid water concentration, and the power supply to the control unit 600 (space purification device 2000) may be stopped. When the power supply to the control unit 600 is subsequently restored due to power outage recovery or the like, it is desirable to perform control again to accurately achieve the target hypochlorous acid water concentration. The purpose of the present disclosure is to accurately adjust the hypochlorous acid water concentration to the target hypochlorous acid water concentration after recovery, even if a power outage or the like occurs during energization. The control content for achieving this purpose will be described below.

[0203] The functions and control flow of the control unit 600 according to the second embodiment will be described with reference to FIG.

[0204] FIG. 5 is a schematic functional block diagram of the control unit 600 according to this embodiment.

[0205] In the control unit 600, the electrolytic water supply control unit 550, the fourth calculation unit 516, the fifth calculation unit 518, the sixth calculation unit 520, and the first change unit 522 have been removed from the control unit 500, and a seventh calculation unit 524, an eighth calculation unit 526, and a second change unit 528 have been added.

[0206] That is, the control unit 600 includes an electrolysis accelerator input control unit 560, a first calculation unit 510, a memory unit 570, a second calculation unit 512, an electrode control unit 540, a stoppage calculation unit 710, a first return calculation unit 720, a second return calculation unit 730, a third calculation unit 514, a seventh calculation unit 524, an eighth calculation unit 526, and a second change unit 528.

[0207] The electrolysis accelerator supply control unit 560 controls the supply of the electrolysis accelerator 310 by the electrolysis accelerator supply unit 300 .

[0208] The first calculation unit 510 calculates the increased concentration of hypochlorous acid water per unit time based on the first sodium chloride concentration, which is the sodium chloride concentration in the electrolytic bath 100 after a change due to the addition of the electrolysis accelerator 310 to the electrolytic bath 100, and a predetermined hypochlorous acid generation efficiency per unit time.

[0209] Below, specific explanations will be given using numerical values, but the numerical values ​​are merely examples and other numerical values ​​may be used.

[0210] First, the first calculation unit 510 calculates a first sodium chloride concentration, which is the sodium chloride concentration in the electrolytic bath 100 after a change due to the addition of the electrolysis accelerator 310 to the electrolytic bath 100. The sodium chloride concentration when the electrolytic bath 100 changes from an empty state to a full state as water is supplied to the electrolytic bath 100 by the water supply unit 110 is 0 mg / L. Assuming that the capacity of the electrolytic bath 100 is 1 L and the mass of the electrolysis accelerator 310 is 500 mg, the calculation formula is as follows:

[0211] First sodium chloride concentration after change due to introduction of electrolysis accelerator 310 into electrolytic cell 100 = mass of electrolysis accelerator 310 ÷ capacity of electrolytic cell 100 = 500 [mg] ÷ 1 [L] = 500 [mg / L] The capacity of electrolytic cell 100 and the mass of electrolysis accelerator 310 are stored in advance in storage unit 570. Storage unit 570 is a so-called memory, and various values ​​are stored therein. In this embodiment, storage unit 570 is a non-volatile memory.

[0212] Next, the first calculation unit 510 acquires a predetermined hypochlorous acid generation efficiency per unit time from the storage unit 570. The hypochlorous acid generation efficiency per unit time is a value determined in advance by experiments or the like and can be set arbitrarily. In the present embodiment, as an example, the hypochlorous acid generation efficiency per unit time is set to 1 [% / min].

[0213] Next, the first calculation unit 510 calculates the increased concentration of hypochlorous acid water per unit time using the following calculation formula:

[0214] Increased concentration of hypochlorous acid water per unit time = first sodium chloride concentration × hypochlorous acid generation efficiency per unit time = 500 [mg / L] × 1 [% / min] = 5 [mg / (L × min)] The second calculation unit 512 calculates the required current application time to achieve the target hypochlorous acid water concentration based on the target hypochlorous acid water concentration in the electrolytic cell 100, the first chlorous acid water concentration which is the hypochlorous acid water concentration in the electrolytic cell 100 before current is applied by the electrode unit 140, and the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510.

[0215] Specifically, first, the second calculation unit 512 acquires the target concentration of hypochlorous acid water in the electrolytic bath 100 from the storage unit 570. In this embodiment, the target concentration of hypochlorous acid water is set to 10 ppm.

[0216] Next, the second calculation unit 512 determines the primary chlorous acid water concentration, which is the concentration of hypochlorous acid water in the electrolytic cell 100 before current is applied by the electrode unit 140. Initially, the electrolytic cell 100 is full of water and no hypochlorous acid is present in the water in the electrolytic cell 100, so the second calculation unit 512 determines 0 ppm as the primary chlorous acid water concentration.

[0217] Next, the second calculation unit 512 calculates the current application time required to achieve the target concentration of hypochlorous acid water. The calculation formula is as follows.

[0218] Required current application time = (target hypochlorous acid water concentration - hypochlorous acid water concentration before current application) ÷ increased concentration of hypochlorous acid water per unit time calculated by first calculation unit 510 = (10 [ppm] - 0 [ppm]) ÷ 5 [mg / (L × min)] = 2 [min] The electrode control unit 540 applies current to the electrode unit 140 for the required current application time calculated by the second calculation unit 512. Specifically, the electrode control unit 540 applies current for 2 [min], which is the required current application time calculated by the second calculation unit 512. This makes it possible to produce hypochlorous acid water with a target hypochlorous acid water concentration in the electrolytic cell 100.

[0219] As can be seen from the above description, the first sodium chloride concentration can also be said to be the sodium chloride concentration in the electrolytic cell 100 before current is applied.

[0220] Furthermore, if the power supply for energizing is interrupted while the electrode control unit 140 is energized for the required energization time, the electrode control unit 540 will restore the power supply after the power supply is restored in order to achieve the target hypochlorous acid water concentration.

[0221] Here, the spatial purification device 2000 includes the charge storage unit 700 that stores electric charges, similar to the first embodiment.

[0222] The charge storage unit 700 is a capacitor such as an electrolytic capacitor, a battery, a button cell, etc. An AC power supply such as AC 100 V is supplied to the space purification device 2000 via an outlet. The AC power supply is converted to DC power supply by a power supply circuit within the space purification device 2000, and the converted DC power supply is supplied to the control unit 600.

[0223] For example, the charge storage unit 700 is connected as a capacitor between the DC power supply supplied to the control unit 600 and GND. This allows power to be supplied to the control unit 600 for a certain period of time using the charge stored in the capacitor, even if the supply of AC power is stopped due to a power outage or the like.

[0224] The charge storage unit 700 may also be a battery connected to the control unit 600. In this case, a DC power supply and a battery are connected in parallel to the control unit 600. However, the battery voltage is set to a voltage that allows the control unit 600 to operate and is lower than the DC power supply so that power is supplied to the control unit 600 from the DC power supply when there is no power outage. Also, a backflow prevention diode is provided to prevent current from flowing from the DC power supply to the battery.

[0225] Note that, because the charge storage unit 700 can store a small amount of charge, it is not suitable as a power source for energizing the electrode unit 140. To energize the electrode unit 140, a power supply from an AC power source, a DC power source, or the like is required. In this embodiment, the charge storage unit 700 will be described as a capacitor. Furthermore, if the power supply for energizing is interrupted due to a power outage or the like, the charge storage unit 700 can supply power to the control unit 600 for a certain period of time.

[0226] The stoppage calculation unit 710 calculates the stoppage hypochlorous acid water concentration, which is the hypochlorous acid water concentration at the time when the power supply for energizing is stopped due to a power outage or the like, and the stoppage sodium chloride concentration, which is the sodium chloride concentration at the time when the power supply for energizing is stopped due to a power outage or the like.

[0227] When the power supply for energizing is stopped due to a power outage or the like, power is supplied from the charge storage unit 700 to the stoppage calculation unit 710 for a certain period of time.

[0228] The stoppage calculation unit 710 uses the power supplied by the charge storage unit 700 to calculate the stoppage hypochlorous acid water concentration and the stoppage sodium chloride concentration.

[0229] Note that any method may be used to determine that an interruption in the power supply for energization has occurred due to a power outage or the like. For example, the control unit 600 determines that an interruption in the power supply for energization has occurred due to a power outage or the like when there is no change in the input voltage from an AC power source having a frequency of 50 Hz or 60 Hz. As another example, the control unit 600 monitors the voltage value of the DC power source, and if the voltage value of the DC power source is less than a predetermined voltage value, determines that an interruption in the power supply for energization has occurred due to a power outage or the like.

[0230] First, a method for calculating the concentration of hypochlorous acid water at the time of shutdown by the shutdown calculation unit 710 will be described.

[0231] The stoppage calculation unit 710 calculates the stoppage hypochlorous acid water concentration based on the primary hypochlorous acid water concentration, the increased hypochlorous acid water concentration per unit time calculated by the first calculation unit 510, and the required current flow time from the start of current flow to the stop of current flow.

[0232] In this embodiment, as an example, assume that the power supply for energization is stopped due to a power outage or the like 1 minute after the start of energization, which is during the required energization time of 2 minutes. That is, the stoppage calculation unit 710 calculates the hypochlorous acid water concentration at the time of shutdown based on the primary chlorous acid water concentration = 0 [ppm], the hypochlorous acid water concentration increase per unit time calculated by the first calculation unit 510 = 5 [mg / (L × min)], and the energization time from the start of energization to the stop of energization = 1 [min]. The calculation formula is as follows.

[0233] Hypochlorous acid water concentration at shutdown = primary chlorous acid water concentration + (hypochlorous acid water increase concentration per unit time calculated by the first calculation unit 510 × power supply time from start of power supply to power supply stop) = 0 [ppm] + (5 [mg / (L × min)] × 1 [min]) = 5 [mg / L] In this embodiment, [mg / L] = [ppm].

[0234] This makes it possible to know the concentration of hypochlorous acid water in the electrolytic cell 100 at the time when the power supply for energizing is stopped. The hypochlorous acid water concentration at the time of stoppage calculated by the stoppage calculation unit 710 is stored in the memory unit 570.

[0235] Next, a method for calculating the sodium chloride concentration at the time of shutdown by the shutdown calculation unit 710 will be described.

[0236] The stoppage calculation unit 710 calculates the stoppage sodium chloride concentration based on the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510, and the required current flow time from the start of current flow to the stop of current flow.

[0237] In this embodiment, the stoppage calculation unit 710 calculates the stoppage sodium chloride concentration based on the first sodium chloride concentration = 500 [mg / L], the increase in hypochlorous acid water concentration per unit time calculated by the first calculation unit 510 = 5 [mg / (L × min)], and the current flow time from the start of current flow to the stop of current flow = 1 [min]. The calculation formula is as follows.

[0238] Sodium chloride concentration at shutdown = first sodium chloride concentration - (increased concentration of hypochlorous acid water per unit time calculated by first calculation unit 510 x duration of current flow from start to stop) = 500 [mg / L] - (5 [mg / (L x min)] x 1 [min]) = 495 [mg / L] This makes it possible to determine the sodium chloride concentration in electrolytic cell 100 at the time when the power supply for current flow was stopped. The sodium chloride concentration at shutdown calculated by shutdown calculation unit 710 is stored in memory unit 570.

[0239] As can be seen from the above description, the charge storage unit 700 can also be said to supply power to the stoppage calculation unit 710 and the storage unit 570 when the power supply for energizing is stopped.

[0240] In this embodiment, since the memory unit 570 is a non-volatile memory, even if the power supply to the memory unit 570 by the charge storage unit 700 is cut off, various values ​​such as the hypochlorous acid water concentration at the time of shutdown and the sodium chloride concentration at the time of shutdown remain stored in the memory unit 570.

[0241] When the power supply for energizing is restored, the first restoration calculation unit 720 calculates the increased concentration of hypochlorous acid water at restoration per unit time based on the sodium chloride concentration at shutdown stored in the memory unit 570 and the preset hypochlorous acid generation efficiency per unit time. Note that the increased concentration of hypochlorous acid water at restoration per unit time refers to the increased concentration of hypochlorous acid water per unit time when energizing is performed by the electrode unit 140 at the timing when the power supply for energizing is restored.

[0242] Specifically, first, the first return calculation unit 720 acquires the sodium chloride concentration at the time of shutdown and a preset hypochlorous acid generation efficiency per unit time from the storage unit 570. In this embodiment, the first return calculation unit 720 acquires the sodium chloride concentration at the time of shutdown = 495 [mg / L] and the preset hypochlorous acid generation efficiency per unit time = 1 [% / min] from the storage unit 570.

[0243] Next, the first recovery calculation unit 720 calculates the recovery-time increased concentration of hypochlorous acid water per unit time using the following calculation formula.

[0244] Increased concentration of hypochlorous acid water at restoration per unit time = sodium chloride concentration at shutdown × hypochlorous acid generation efficiency per unit time = 495 [mg / L] × 1 [% / min] = 4.95 [mg / (L × min)] The second restoration calculation unit 730 calculates the restoration current application time, which is the power application time required for the power supply for energization to achieve the target hypochlorous acid water concentration after restoration, based on the target hypochlorous acid water concentration of the electrolytic cell 100, the hypochlorous acid water concentration at shutdown stored in the memory unit 570, and the increased concentration of hypochlorous acid water at restoration per unit time calculated by the first restoration calculation unit 720.

[0245] First, the second return calculation unit 730 acquires the target hypochlorous acid water concentration of the electrolytic cell 100, the hypochlorous acid water concentration at shutdown stored in the memory unit 570, and the increased concentration of hypochlorous acid water at restoration per unit time calculated by the first return calculation unit 720. In this embodiment, the following are acquired: target hypochlorous acid water concentration = 10 [ppm], hypochlorous acid water concentration at shutdown = 5 [mg / L] = 5 [ppm], and increased concentration of hypochlorous acid water per unit time at restoration = 4.95 [mg / (L × min)].

[0246] Next, the second recovery calculation unit 730 calculates the recovery power supply time using the following formula:

[0247] Restoration current supply time = (target hypochlorous acid water concentration - hypochlorous acid water concentration at time of shutdown) ÷ restoration hypochlorous acid water increase concentration per unit time calculated by the first restoration calculation unit 720 = (10 [ppm] - 5 [ppm]) ÷ 4.95 [mg / (L × min)] = 1.01 [min] When the power supply for energization is restored, the electrode control unit 540 energizes the electrode unit 140 for the restoration current supply time calculated by the second restoration calculation unit 730. Specifically, the electrode control unit 540 energizes for 1.01 [min], which is the restoration current supply time calculated by the second restoration calculation unit 730. As a result, even if the power supply for energization is stopped, hypochlorous acid water having the target hypochlorous acid water concentration can be accurately produced in the electrolytic cell 100 after the power supply for energization is restored.

[0248] The third calculation unit 514 calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 (which can also be said to be after return current is passed or after current is completed), based on the sodium chloride concentration at the time of shutdown, the increased concentration of hypochlorous acid water at the time of recovery per unit time calculated by the first recovery calculation unit 720, and the recovery current application time calculated by the second recovery calculation unit 730.

[0249] The sodium chloride concentration in electrolytic cell 100 after energization (after energization return) is lower than the sodium chloride concentration in electrolytic cell 100 before energization return. Note that the sodium chloride concentration in electrolytic cell 100 before energization return refers to the sodium chloride concentration at the time of shutdown.

[0250] Specifically, the third calculation unit 514 first acquires the sodium chloride concentration at shutdown, the increased concentration of hypochlorous acid water per unit time at restoration, and the restoration power supply time. In this embodiment, the sodium chloride concentration at shutdown = 495 [mg / L], the increased concentration of hypochlorous acid water per unit time at restoration = 4.95 [mg / (L × min)], and the restoration power supply time = 1.01 [min] are acquired.

[0251] Next, the third calculation unit 514 calculates the second sodium chloride concentration using the following formula:

[0252] Second sodium chloride concentration = sodium chloride concentration at shutdown - (increased concentration of hypochlorous acid water at restoration per unit time x restoration current application time) = 495 [mg / L] - (4.95 [mg / (L x min)] x 1.01 [min]) = 490.0005 [mg / L] This makes it possible to grasp the sodium chloride concentration in the electrolytic cell 100 after the electrode unit 140 is energized (after restoration current application).

[0253] In this embodiment, for ease of understanding, the second sodium chloride concentration is set to 490 mg / L. Of course, the following calculations may be performed with the second sodium chloride concentration set to 490.0005 mg / L.

[0254] The seventh calculation unit 524 calculates the amount of hypochlorous acid reduced from the electrolytic bath 100 due to purification by the purification unit 401. In the present embodiment, the seventh calculation unit 524 uses a hypochlorous acid consumption amount table to calculate the amount of hypochlorous acid reduced.

[0255] The hypochlorous acid consumption amount table will be described with reference to FIG.

[0256] FIG. 6 is a diagram showing an example of the data structure of the hypochlorous acid consumption amount table stored in the storage unit 570 of the control unit 600.

[0257] The hypochlorous acid consumption table stores a plurality of hypochlorous acid consumption amounts per predetermined unit time corresponding to a plurality of predetermined air volumes. The hypochlorous acid consumption amounts per predetermined unit time corresponding to a predetermined air volume are values ​​determined in advance by experiments or the like and can be set arbitrarily.

[0258] In this embodiment, as an example, if the air volume is the first air volume [cubic meters / h], the hypochlorous acid consumption per unit time is 0.005 [mg / min]. If the air volume is the second air volume [cubic meters / h], the hypochlorous acid consumption per unit time is 0.156 [mg / min]. If the air volume is the third air volume [cubic meters / h], the hypochlorous acid consumption per unit time is 0.22 [mg / min]. If the air volume is the fourth air volume [cubic meters / h], the hypochlorous acid consumption per unit time is 0.312 [mg / min]. If the air volume is the fifth air volume [cubic meters / h], the hypochlorous acid consumption per unit time is 0.4 [mg / min].

[0259] In this embodiment, the relationship between the air volumes is first air volume < second air volume < third air volume < fourth air volume < fifth air volume. In the hypochlorous acid consumption table, the larger the air volume, the larger the corresponding hypochlorous acid consumption per unit time.

[0260] In this embodiment, the air volume of the fan of the purification unit 401 can be set by the user, and the user can set the air volume in an air volume setting unit (not shown) of the space purification device 2000. The air volumes that can be set by the user are any of the first air volume, the second air volume, the third air volume, the fourth air volume, and the fifth air volume.

[0261] In this embodiment, it is assumed that the user has set the third air volume in the air volume setting unit. The control unit 600 acquires the third air volume set by the user and stores it in the storage unit 570.

[0262] 5, the seventh calculation unit 524 obtains the hypochlorous acid consumption amount per unit time based on the air volume set by the user and the hypochlorous acid consumption amount table stored in the storage unit 570. Specifically, when the air volume set by the user stored in the storage unit 570 is the third air volume, the seventh calculation unit 524 obtains 0.22 [mg / min] as the hypochlorous acid consumption amount per unit time from the hypochlorous acid consumption amount table.

[0263] The seventh calculation unit 524 calculates the amount of hypochlorous acid reduced from the electrolytic bath 100 over a predetermined purification time. In the present embodiment, the predetermined purification time is 30 min. The formula for calculating the amount of hypochlorous acid reduced from the electrolytic bath 100 over a predetermined purification time is as follows:

[0264] Amount of hypochlorous acid reduced from electrolytic cell 100 over a specified purification time = Acquired amount of hypochlorous acid consumed per unit time × Purification time = 0.22 [mg / min] × 30 [min] = 6.6 [mg] This makes it possible to determine the amount of hypochlorous acid reduced from electrolytic cell 100 over a specified purification time.

[0265] The eighth calculation unit 526 calculates the tertiary hypochlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell 100 after the hypochlorous acid has been reduced by purification, based on the target hypochlorous acid water concentration and the amount of hypochlorous acid reduction calculated by the seventh calculation unit 524.

[0266] The concentration of hypochlorous acid water in the electrolytic cell 100 after the reduction of hypochlorous acid by purification becomes lower than the concentration of hypochlorous acid water in the electrolytic cell 100 before the reduction of hypochlorous acid (target hypochlorous acid concentration) due to the water supplied by the water supply unit 110.

[0267] Specifically, first, the eighth calculation unit 526 acquires the target hypochlorous acid water concentration and the amount of hypochlorous acid reduction calculated by the seventh calculation unit 524. In the present embodiment, the eighth calculation unit 526 acquires the target hypochlorous acid water concentration = 10 [ppm] and the amount of hypochlorous acid reduction calculated by the seventh calculation unit 524 = 6.6 [mg].

[0268] Next, the eighth calculation unit 526 calculates the amount of hypochlorous acid in the electrolytic bath 100 before the decrease in the amount of hypochlorous acid decreased calculated by the seventh calculation unit 524. The calculation formula is as follows.

[0269] Amount of hypochlorous acid in electrolytic bath 100 before the amount of hypochlorous acid decrease has decreased = Target concentration of hypochlorous acid water × Capacity of electrolytic bath 100 = 10 [ppm = mg / L] × 1 [L] = 10 [mg] Next, the eighth calculation unit 526 calculates the amount of hypochlorous acid in electrolytic bath 100 after the amount of hypochlorous acid decrease has decreased. The calculation formula is as follows.

[0270] Amount of hypochlorous acid in electrolytic bath 100 after the amount of hypochlorous acid reduction has decreased = Amount of hypochlorous acid in electrolytic bath 100 before the amount of hypochlorous acid reduction has decreased - Amount of hypochlorous acid reduction = 10 [mg] - 6.6 [mg] = 3.4 [mg] Next, the eighth calculation unit 526 calculates the concentration of the tertiary chlorous acid water. The calculation formula is as follows.

[0271] Tertiary chlorous acid water concentration = Amount of hypochlorous acid in electrolytic cell 100 after reduction in amount of hypochlorous acid ÷ Capacity of electrolytic cell 100 = 3.4 [mg] ÷ 1 [L] = 3.4 [mg / L = ppm] This makes it possible to determine the concentration of hypochlorous acid water in electrolytic cell 100 after the reduction in hypochlorous acid due to purification.

[0272] The second change unit 528 changes the first sodium chloride concentration used in the calculation by the first calculation unit 510 to the second sodium chloride concentration calculated by the third calculation unit 514, and changes the first chlorous acid water concentration used in the calculation by the second calculation unit 512 to the tertiary chlorous acid water concentration calculated by the eighth calculation unit 526.

[0273] Specifically, first, the second change unit 528 acquires the pre-change first sodium chloride concentration and the pre-change primary chlorous acid water concentration. The pre-change first sodium chloride concentration and the pre-change primary chlorous acid water concentration are stored in the memory unit 570 by, for example, the first calculation unit 510 or the second calculation unit 512.

[0274] In this embodiment, the second change unit 528 acquires the pre-change first sodium chloride concentration = 500 [mg / L] and the pre-change primary chlorous acid water concentration = 0 [ppm].

[0275] The second change unit 528 changes the first sodium chloride concentration before the change = 500 [mg / L] to the second sodium chloride concentration calculated by the third calculation unit 514 = 490 [mg / L], and changes the first primary chlorous acid water concentration before the change = 0 [ppm] to the tertiary chlorous acid water concentration calculated by the eighth calculation unit 526 = 3.4 [ppm].

[0276] In other words, the second change unit 528 updates the first sodium chloride concentration to the latest sodium chloride concentration of the electrolytic bath 100 and updates the first hypochlorous acid water concentration to the latest hypochlorous acid water concentration of the electrolytic bath 100.

[0277] The first calculation unit 510 calculates a new increased concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration (changed first sodium chloride concentration) changed by the second change unit 528 and the predetermined hypochlorous acid generation efficiency per unit time.

[0278] Specifically, first, the first calculation unit 510 acquires the changed first sodium chloride concentration and a preset hypochlorous acid generation efficiency per unit time. In the present embodiment, the first calculation unit 510 acquires the changed first sodium chloride concentration = 490 [mg / L] and the preset hypochlorous acid generation efficiency per unit time = 1 [% / min].

[0279] Next, the first calculation unit 510 calculates the new increase in concentration of hypochlorous acid water per unit time using the following specific calculation formula:

[0280] New increase in concentration of hypochlorous acid water per unit time = changed first sodium chloride concentration × hypochlorous acid generation efficiency per unit time = 490 [mg / L] × 1 [% / min] = 4.9 [mg / (L × min)] The second calculation unit 512 calculates a new required current application time for the electrode unit 140 based on the target hypochlorous acid water concentration of the electrolytic cell 100, the new primary chlorous acid water concentration (changed primary chlorous acid water concentration) changed by the second change unit 528, and the new increase in concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510.

[0281] Specifically, first, the second calculation unit 512 acquires the target hypochlorous acid water concentration of the electrolytic bath 100, the changed primary chlorous acid water concentration, and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510. In this embodiment, the second calculation unit 512 acquires the target hypochlorous acid water concentration of the electrolytic bath 100 = 10 [ppm], the changed primary chlorous acid water concentration = 3.4 [ppm], and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510 = 4.9 [mg / (L × min)].

[0282] Next, the second calculation unit 512 calculates the new required current application time using the following specific calculation formula:

[0283] New required current flow time = (target hypochlorous acid water concentration - changed primary hypochlorous acid water concentration) ÷ new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510 = (10 [ppm] - 3.4 [ppm]) ÷ 4.9 [mg / (L × min)] = 1.35 [min] The electrode control unit 540 applies current to the electrode unit 140 for the new required current flow time calculated by the second calculation unit 512. In this embodiment, the electrode control unit 540 applies current to the electrode unit 140 for the new required current flow time = 1.35 [min]. This allows the electrolytic cell 100 to again produce hypochlorous acid water with the target hypochlorous acid water concentration.

[0284] Thereafter, the control unit 600 repeats the following steps: changing the first sodium chloride concentration and the first chlorous acid water concentration by the second changing unit 528; calculating a new increased concentration of hypochlorous acid water per unit time by the first calculating unit 510; calculating a new required current flow time by the second calculating unit 512; and controlling current flow for the new required current flow time by the electrode control unit 540. This allows the hypochlorous acid water concentration in the electrolytic cell 100 to be continuously kept at the target hypochlorous acid water concentration.

[0285] As in the first embodiment, each functional block of the control unit 600 can be realized in various ways by combining hardware and software.

[0286] Next, the control by the control unit 600 having the above configuration will be described.

[0287] FIG. 7 is a flowchart showing the control by the control unit 600 according to this embodiment.

[0288] First, the first calculation unit 510 calculates the increasing concentration of hypochlorous acid water per unit time (S50).

[0289] The second calculation unit 512 calculates the current application time required to achieve the target hypochlorous acid water concentration (S52).

[0290] The electrode control unit 540 starts energizing the electrode unit 140 for the required energization time calculated by the second calculation unit 512 (S54).

[0291] As a result, after the required energization time has elapsed, hypochlorous acid water having the target hypochlorous acid water concentration can be produced in the electrolytic cell 100.

[0292] Here, if the power supply for energizing is interrupted while the electrode control unit 540 is energizing the electrode unit 140 for the required energization time, the electrode control unit 540 will restore the power supply to achieve the target hypochlorous acid water concentration after the power supply is restored.

[0293] First, when the control unit 600 determines that the power supply for energizing has been stopped due to a power outage or the like (S56), the stoppage calculation unit 710 calculates the stoppage hypochlorous acid water concentration and the stoppage sodium chloride concentration (S58).

[0294] This makes it possible to determine the concentration of hypochlorous acid water and sodium chloride in the electrolytic cell 100 at the time when the power supply to the electrode unit 140 is stopped.

[0295] The first recovery calculation unit 720 calculates the increased concentration of hypochlorous acid water per unit time upon recovery when the power supply for energizing is restored (S60).

[0296] The second recovery calculation unit 730 calculates the recovery power supply time (S62).

[0297] The electrode control unit 540 continues energizing for the recovery energizing time (S64).

[0298] This allows the electrolytic cell 100 to produce hypochlorous acid water with a target hypochlorous acid water concentration.

[0299] The third calculation unit 514 calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 (after the return current is passed) (S66).

[0300] This makes it possible to grasp the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 .

[0301] In addition, if the power supply for energizing the electrode unit 140 is not interrupted while the electrode unit 140 is being energized for the required energization time, the third calculation unit 514 calculates the sodium chloride concentration in the electrolytic cell 100 after the electrode unit 140 has been energized for the required energization time as the second sodium chloride concentration.

[0302] The calculation method in this case will be described below.

[0303] The third calculation unit 514 calculates the sodium chloride concentration (second sodium chloride concentration) in the electrolytic cell 100 after current is applied by the electrode unit 140 based on the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510, and the required current application time calculated by the second calculation unit 512.

[0304] The sodium chloride concentration in the electrolytic cell 100 after energization is lower than the sodium chloride concentration in the electrolytic cell 100 before energization.

[0305] Specifically, first, the third calculation unit 514 acquires the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time, and the required energization time.

[0306] Next, the third calculation unit 514 calculates the second sodium chloride concentration using the formula "second sodium chloride concentration = first sodium chloride concentration - (increase in concentration of hypochlorous acid water per unit time x required power application time)".

[0307] This makes it possible to grasp the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 .

[0308] In other words, the method by which the third calculation unit 514 calculates the "sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140" differs depending on whether or not the power supply for passing current is interrupted while current is being passed through the electrode unit 140 for the required current passing time.

[0309] In other words, the third calculation unit 514 uses different calculation methods for the sodium chloride concentration in the electrolytic cell 100 after current is passed through the electrode unit 140 depending on whether or not the power supply for passing current is interrupted while current is being passed through the electrode unit 140 for the required current passing time.

[0310] This concludes the explanation of the method for calculating the second sodium chloride concentration by the third calculation unit 514 when the power supply for energizing the electrode unit 140 is not interrupted during the required energization time.

[0311] The seventh calculation unit 524 calculates the amount of hypochlorous acid reduced from the electrolytic bath 100 due to the purification by the purification unit 401 (S68).

[0312] This makes it possible to grasp the amount of hypochlorous acid that has decreased from the electrolytic cell 100.

[0313] The eighth calculation unit 526 calculates the concentration of the tertiary chlorous acid solution, which is the concentration of the hypochlorous acid solution in the electrolytic bath 100 after the hypochlorous acid has been reduced by the purification (S70).

[0314] This makes it possible to grasp the concentration of hypochlorous acid water in the electrolytic cell 100 after the hypochlorous acid has been reduced by purification.

[0315] The second change unit 528 changes the first sodium chloride concentration to the second sodium chloride concentration calculated by the third calculation unit 514, and changes the first chlorous acid water concentration to the tertiary chlorous acid water concentration calculated by the eighth calculation unit 526 (S72).

[0316] The first calculation unit 510 calculates a new increased concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration changed by the second change unit 528 and the predetermined hypochlorous acid generation efficiency per unit time (S74).

[0317] The second calculation unit 512 calculates the new required current application time for the electrode unit 140 based on the target hypochlorous acid water concentration of the electrolytic cell 100, the new primary hypochlorous acid water concentration changed by the second change unit 528, and the new increased concentration of hypochlorous acid water per unit time (S76).

[0318] The electrode control unit 540 energizes the electrode unit 140 for the new required energization time calculated by the second calculation unit 512 (S78).

[0319] This allows the electrolytic cell 100 to generate hypochlorous acid water with the target hypochlorous acid water concentration again.

[0320] By the above method, even in the space purification device 2000 that does not include the septic tank 200, the concentration of hypochlorous acid water in the electrolytic tank 100 can be continuously maintained at the target concentration of hypochlorous acid water.

[0321] Although the present disclosure has been described above based on the embodiments, it goes without saying that the present disclosure is not limited to the above-described embodiments and that various modifications are possible within the scope of the gist of the present disclosure. Furthermore, the numerical values ​​given in the above-described embodiments are merely examples, and it goes without saying that the present disclosure is not limited to adopting the numerical values ​​used in the description of the embodiments.

[0322] For example, in embodiment 1, the electrolyzed water supply unit 120 has been described as being configured to include a water supply pump 122, a water supply pipe 124, and a supply port 126, but other configurations are also acceptable as long as they are capable of supplying hypochlorous acid water from the electrolytic cell 100 to the septic tank 200.

[0323] In addition, in the first and second embodiments, when the water in the electrolytic bath 100 is drained, the sodium chloride concentration and the hypochlorous acid water concentration in the electrolytic bath 100 may be set to zero.

[0324] Here, in the space purification device 1000 (space purification device 2000), if electrolysis continues by passing current through the electrode unit 140, inorganic salts contained in water, such as calcium carbonate, calcium sulfate, and silica, may adhere to the electrode unit 140 that performs the electrolysis as impurities, which may shorten the life of the electrode unit 140.

[0325] Therefore, it is preferable to periodically perform maintenance such as draining and cleaning the electrolytic cell 100. When the electrolytic cell 100 is drained as part of maintenance, sodium chloride and hypochlorous acid are no longer present in the electrolytic cell 100. In other words, when the electrolytic cell 100 is drained, the control unit 500 (control unit 600) sets the sodium chloride concentration and hypochlorous acid water concentration in the electrolytic cell 100 to zero.

[0326] This allows the sodium chloride concentration and the hypochlorous acid water concentration to be updated appropriately.

[0327] When the electrolytic cell 100 is drained for maintenance, new water is supplied into the electrolytic cell 100 by the water supply unit 110 .

[0328] (Summary of the Invention) The spatial purification device according to the present disclosure includes an electrolytic cell that mixes an electrolysis accelerator and water, a water supply unit that supplies water to the electrolytic cell, an electrode unit that generates hypochlorous acid water from the electrolysis accelerator and water mixed in the electrolytic cell, a first calculation unit that calculates an increased concentration of hypochlorous acid water per unit time based on a first sodium chloride concentration that is the sodium chloride concentration in the electrolytic cell after a change due to the addition of an electrolysis accelerator to the electrolytic cell and a predetermined hypochlorous acid generation efficiency per unit time, and a target hypochlorous acid water concentration in the electrolytic cell and a hypochlorous acid concentration in the electrolytic cell before current is applied by the electrode unit. The device is equipped with a second calculation unit that calculates the required current flow time to achieve the target hypochlorous acid water concentration based on the primary chlorous acid water concentration, which is the chlorous acid water concentration, and the increasing concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and an electrode control unit that supplies current to the electrode unit for the required current flow time calculated by the second calculation unit, and if the power supply for supplying current is interrupted while current is being supplied to the electrode unit for the required current flow time, the electrode control unit performs recovery current flow to achieve the target hypochlorous acid water concentration after the power supply is restored.

[0329] As a result, even if a power outage occurs during power supply, the concentration of hypochlorous acid water in the electrolytic cell can be adjusted to the target concentration after power is restored.

[0330] The apparatus also includes a stoppage time calculation unit that calculates a stoppage time hypochlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell at the time when the power supply is stopped, and a stoppage time sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell at the time when the power supply is stopped; a memory unit that stores the stoppage time hypochlorous acid water concentration and the stoppage time sodium chloride concentration calculated by the stoppage time calculation unit; a charge storage unit that supplies power to the stoppage time calculation unit and the memory unit when the power supply is stopped; and a charge storage unit that stores the stoppage time sodium chloride concentration stored in the memory unit and the stoppage time sodium chloride concentration when the power supply is restored. and a second return calculation unit that calculates a return current time, which is the current time required to achieve the target hypochlorous acid water concentration after the power supply is restored, based on the target hypochlorous acid water concentration of the electrolytic cell, the hypochlorous acid water concentration at the time of shutdown stored in the memory unit, and the increased concentration of hypochlorous acid water at the time of restoration per unit time calculated by the first return calculation unit. When the power supply is restored, the electrode control unit may apply current to the electrode unit for the return current time calculated by the second return calculation unit.

[0331] This allows the concentration of hypochlorous acid water in the electrolytic cell to be accurately adjusted to the target concentration after the power supply is restored.

[0332] In addition, the stop-time calculation unit may calculate the stop-time hypochlorous acid water concentration based on the first chlorous acid water concentration, the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and the current flow time from the start of current flow to the stop of current flow during the required current flow time, and may calculate the stop-time sodium chloride concentration based on the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and the current flow time from the start of current flow to the stop of current flow during the required current flow time.

[0333] This makes it possible to grasp the concentration of hypochlorous acid water and sodium chloride in the electrolytic cell at the time when the power supply for energizing is stopped.

[0334] Furthermore, when the electrolytic cell is drained, the sodium chloride concentration and hypochlorous acid water concentration in the electrolytic cell may be set to zero.

[0335] This allows the sodium chloride concentration and hypochlorous acid water concentration in the electrolytic cell to be set appropriately when the electrolytic cell is drained.

[0336] In addition, the apparatus may further include a third calculation unit that calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell after the electrode unit has been energized, based on the sodium chloride concentration at the time of shutdown, the increased concentration of hypochlorous acid water per unit time at the time of restoration, and the restoration power supply time.

[0337] This makes it possible to grasp the sodium chloride concentration in the electrolytic cell after current is passed through the electrode section (after current is restored).

[0338] The system may further include a purification tank that stores hypochlorous acid water produced in the electrolytic tank, an electrolyzed water supply unit that supplies hypochlorous acid water from the electrolytic tank to the purification tank, and a purification unit that purifies the space using the hypochlorous acid water stored in the purification tank.

[0339] This allows the space to be purified.

[0340] The apparatus may further include an electrolyzed water supply control unit that controls the supply of hypochlorous acid water to the septic tank by the electrolyzed water supply unit, a fourth calculation unit that calculates the amount of electrolyzed water delivered by the electrolyzed water supply unit, and a fifth calculation unit that calculates a third sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell after electrolyzed water is delivered by the electrolyzed water supply unit, based on the second sodium chloride concentration calculated by the third calculation unit, the amount of electrolyzed water delivered calculated by the fourth calculation unit, and the capacity of the electrolytic cell.

[0341] This makes it possible to grasp the sodium chloride concentration in the electrolytic cell after the electrolytic water supply unit has supplied the electrolytic water.

[0342] In addition, a sixth calculation unit may be provided that calculates the secondary chlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell after the electrolytic water is supplied by the electrolytic water supply unit, based on the target hypochlorous acid water concentration, the amount of electrolytic water supplied, and the capacity of the electrolytic cell.

[0343] This makes it possible to grasp the concentration of hypochlorous acid water in the electrolytic cell after electrolyzed water is delivered.

[0344] The electrolytic cell may further include a first change unit that changes the first sodium chloride concentration to the third sodium chloride concentration calculated by the fifth calculation unit and changes the primary chlorous acid water concentration to the secondary chlorous acid water concentration calculated by the sixth calculation unit, wherein the first calculation unit calculates a new increased concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration changed by the first change unit and a predetermined hypochlorous acid generation efficiency per unit time, the second calculation unit calculates a new required current flow time for the electrode unit based on the target hypochlorous acid water concentration of the electrolytic cell, the new primary chlorous acid water concentration changed by the first change unit, and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and the electrode control unit may apply current to the electrode unit for the new required current flow time calculated by the second calculation unit.

[0345] This allows the electrolytic cell to again produce hypochlorous acid water with the target hypochlorous acid water concentration.

[0346] In addition, the following may be repeated: changing the first sodium chloride concentration and the first hypochlorous acid water concentration by the first change unit; calculating a new increased concentration of hypochlorous acid water per unit time by the first calculation unit; calculating a new required current flow time by the second calculation unit; and controlling current flow for the new required current flow time by the electrode control unit.

[0347] This allows the concentration of hypochlorous acid water in the electrolytic cell to be continuously maintained at the target concentration of hypochlorous acid water.

[0348] The system may further include a purification unit that purifies the space using hypochlorous acid water from the electrolytic cell.

[0349] This allows the space to be purified.

[0350] The electrolytic cell may further include a seventh calculation unit that calculates the amount of hypochlorous acid reduced from the electrolytic cell due to purification by the purification unit, and an eighth calculation unit that calculates the tertiary hypochlorous acid concentration, which is the hypochlorous acid concentration in the electrolytic cell after the hypochlorous acid has been reduced by purification, based on the target hypochlorous acid concentration and the amount of hypochlorous acid reduced calculated by the seventh calculation unit.

[0351] This makes it possible to grasp the concentration of hypochlorous acid water in the electrolytic cell after the hypochlorous acid has been reduced by purification.

[0352] The electrolytic cell may further include a second change unit that changes the first sodium chloride concentration to the second sodium chloride concentration calculated by the third calculation unit and changes the primary chlorous acid water concentration to the tertiary chlorous acid water concentration calculated by the eighth calculation unit, wherein the first calculation unit calculates a new increased concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration changed by the second change unit and a predetermined hypochlorous acid generation efficiency per unit time, the second calculation unit calculates a new required current flow time for the electrode unit based on the target hypochlorous acid water concentration of the electrolytic cell, the new primary chlorous acid water concentration changed by the second change unit, and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and the electrode control unit may apply current to the electrode unit for the new required current flow time calculated by the second calculation unit.

[0353] This allows the electrolytic cell to again produce hypochlorous acid water with the target hypochlorous acid water concentration.

[0354] In addition, the following may be repeated: changing the first sodium chloride concentration and the first hypochlorous acid water concentration by the second change unit; calculating a new increased concentration of hypochlorous acid water per unit time by the first calculation unit; calculating a new required current flow time by the second calculation unit; and controlling current flow for the new required current flow time by the electrode control unit.

[0355] This allows the concentration of hypochlorous acid water in the electrolytic cell to be continuously maintained at the target concentration of hypochlorous acid water.

[0356] As described above, the space purification device according to the present disclosure is useful as a space purification device that removes (including inactivates) bacteria, fungi, viruses, odors, and the like in the air.

[0357] REFERENCE SIGNS LIST 100 Electrolytic cell 110 Water supply unit 112 Lid 120 Electrolyzed water supply unit 122 Water supply pump 124 Water supply pipe 126 Supply port 130 Electrolytic cell full float 140 Electrode unit 200 Septic tank 210 Septic tank full float 300 Electrolysis accelerator supply unit 310 Electrolysis accelerator 400 Purification unit 401 Purification unit 500 Control unit 510 First calculation unit 512 Second calculation unit 514 Third calculation unit 516 Fourth calculation unit 518 Fifth calculation unit 520 Sixth calculation unit 522 First change unit 524 Seventh calculation unit 526 Eighth calculation unit 528 Second change unit 540 Electrode control unit 550 Electrolyzed water supply control unit 560 Electrolysis accelerator supply control unit 570 Memory unit 600 Control unit 700 Charge storage unit 710 Stop time calculation unit 720 First return calculation unit 730 Second return calculation unit 1000 Space purification device 2000 Space purification device S10 to S42, S50 to S78 Steps

Claims

1. An electrolytic cell that mixes an electrolytic promoter and water; a water supply unit that supplies the water to the electrolytic cell; an electrode unit that generates hypochlorous acid water from the electrolytic promoter and the water mixed in the electrolytic cell; a first calculation unit that calculates an increase in hypochlorous acid water concentration per unit time based on a first sodium chloride concentration, which is the sodium chloride concentration of the electrolytic cell after a change due to the addition of the electrolytic promoter to the electrolytic cell, and a predetermined hypochlorous acid generation efficiency per unit time; a second calculation unit that calculates a required current flow time to achieve the target hypochlorous acid water concentration based on a target hypochlorous acid water concentration of the electrolytic cell, a first chlorous acid water concentration, which is the hypochlorous acid water concentration of the electrolytic cell before current is passed through the electrode unit, and the increase in hypochlorous acid water concentration per unit time calculated by the first calculation unit; and an electrode control unit that passes current to the electrode unit for the required current flow time calculated by the second calculation unit, When the power supply for energizing the electrode unit is stopped during the required energization time, the electrode control unit performs a restoration of energization to achieve the target hypochlorous acid water concentration after the power supply is restored.

2. A stop time calculation unit that calculates a stop time hypochlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell at the timing when the power supply is stopped, and a stop time sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell at the timing when the power supply is stopped; a memory unit that stores the stop time hypochlorous acid water concentration and the stop time sodium chloride concentration calculated by the stop time calculation unit; a charge storage unit that supplies power to the stop time calculation unit and the memory unit when the power supply is stopped; and a first return calculation unit that calculates a return time hypochlorous acid water elevated concentration per unit time based on the stop time sodium chloride concentration stored in the memory unit and the preset hypochlorous acid generation efficiency per unit time when the power supply is restored. The space purification device according to claim 1, further comprising: a second recovery calculation unit that calculates a recovery current flow time, which is a current flow time required to achieve the target hypochlorous acid water concentration after the power supply is restored, based on the target hypochlorous acid water concentration of the electrolytic cell, the hypochlorous acid water concentration at the time of shutdown stored in the memory unit, and the increased concentration of hypochlorous acid water at the time of restoration per unit time calculated by the first recovery calculation unit; and when the power supply is restored, the electrode control unit applies current to the electrode unit for the recovery current flow time calculated by the second recovery calculation unit.

3. The space purification device described in claim 2, wherein the stop-time calculation unit calculates the stop-time hypochlorous acid water concentration based on the first hypochlorous acid water concentration, the increased hypochlorous acid water concentration per unit time calculated by the first calculation unit, and the current flow time from the start of current flow to the stop of current flow during the required current flow time, and calculates the stop-time sodium chloride concentration based on the first sodium chloride concentration, the increased hypochlorous acid water concentration per unit time calculated by the first calculation unit, and the current flow time from the start of current flow to the stop of current flow during the required current flow time.

4. The spatial purification device according to claim 1, wherein, when the electrolytic cell is drained, the sodium chloride concentration and the hypochlorous acid water concentration in the electrolytic cell are set to zero.

5. The spatial purification device of claim 2, further comprising a third calculation unit that calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell after the return current flow by the electrode unit, based on the sodium chloride concentration at the time of shutdown, the increased concentration of hypochlorous acid water at the time of return per unit time, and the return current flow time.

6. The space purification device according to claim 5, further comprising: a purification tank for storing the hypochlorous acid water produced in the electrolytic cell; an electrolytic water supply unit for supplying the hypochlorous acid water from the electrolytic cell to the purification tank; and a purification unit for purifying the space using the hypochlorous acid water stored in the purification tank.

7. The space purification device described in claim 6, further comprising: an electrolyzed water supply control unit that controls the supply of hypochlorous acid water to the septic tank by the electrolyzed water supply unit; a fourth calculation unit that calculates the amount of electrolyzed water delivered by the electrolyzed water supply unit; and a fifth calculation unit that calculates a third sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell after electrolyzed water is delivered by the electrolyzed water supply unit, based on the second sodium chloride concentration calculated by the third calculation unit, the amount of electrolyzed water delivered calculated by the fourth calculation unit, and the capacity of the electrolytic cell.

8. The spatial purification device of claim 7, further comprising a sixth calculation unit that calculates a secondary hypochlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell after the electrolytic water is delivered by the electrolytic water supply unit, based on the target hypochlorous acid water concentration, the amount of electrolytic water delivered, and the capacity of the electrolytic cell.

9. The space purification device according to claim 8, further comprising a first change unit that changes the first sodium chloride concentration to the third sodium chloride concentration calculated by the fifth calculation unit and changes the first chlorous acid water concentration to the second chlorous acid water concentration calculated by the sixth calculation unit, wherein the first calculation unit calculates a new increased concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration changed by the first change unit and the previously set hypochlorous acid generation efficiency per unit time, the second calculation unit calculates a new required current flow time for the electrode unit based on the target hypochlorous acid water concentration of the electrolytic cell, the new first chlorous acid water concentration changed by the first change unit, and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and the electrode control unit applies current to the electrode unit for the new required current flow time calculated by the second calculation unit.

10. The space purification device of claim 9, which repeats the following steps: changing the first sodium chloride concentration and the first hypochlorous acid water concentration by the first change unit; calculating the new increased concentration of hypochlorous acid water per unit time by the first calculation unit; calculating the new required current flow time by the second calculation unit; and controlling current flow for the new required current flow time by the electrode control unit.

11. The space purification device according to claim 5, further comprising a purification unit that purifies the space using the hypochlorous acid water in the electrolytic cell.

12. The spatial purification device of claim 11, further comprising: a seventh calculation unit that calculates the amount of hypochlorous acid reduced from the electrolytic cell due to purification by the purification unit; and an eighth calculation unit that calculates a tertiary hypochlorous acid concentration, which is the hypochlorous acid concentration in the electrolytic cell after hypochlorous acid has been reduced by the purification, based on the target hypochlorous acid concentration and the amount of hypochlorous acid reduced calculated by the seventh calculation unit.

13. The space purification device according to claim 12, further comprising a second change unit that changes the first sodium chloride concentration to the second sodium chloride concentration calculated by the third calculation unit and changes the first chlorous acid water concentration to the tertiary chlorous acid water concentration calculated by the eighth calculation unit, wherein the first calculation unit calculates a new increased concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration changed by the second change unit and the previously set hypochlorous acid generation efficiency per unit time, the second calculation unit calculates a new required current flow time for the electrode unit based on the target hypochlorous acid water concentration of the electrolytic cell, the new first chlorous acid water concentration changed by the second change unit, and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and the electrode control unit applies current to the electrode unit for the new required current flow time calculated by the second calculation unit.

14. The spatial purification device of claim 13, which repeats the following steps: changing the first sodium chloride concentration and the first hypochlorous acid water concentration by the second change unit; calculating the new increased concentration of hypochlorous acid water per unit time by the first calculation unit; calculating the new required current flow time by the second calculation unit; and controlling current flow for the new required current flow time by the electrode control unit.