Space Purification Device

Abstract

To provide a space purifier deciding an energization time so that the concentration of hypochlorite water solution after the energization time course becomes a target value.SOLUTION: The space purifier in this invention comprises: an electrolytic bath 100 mixing an electrolysis accelerator 310 with water; a water supply part 110 supplying water to the electrolytic bath 100; and an electrode part 140 generating a hypochlorite water solution from the electrolysis accelerator 310 and water mixed in the bath 100. Further, the purifier comprises: a first calculation part 510 calculating the rising temperature per unit time of the hypochlorite water solution; a second calculation part calculating the energization time necessary for achieving the target concentration of hypochlorite water solution; and an electrode control part 540 carrying out energization during the necessary energization time at the electrode part 140. Thereby, the above problem is solved.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a space purification device. [Background technology]

[0002] There is known an air purification device that generates and releases hypochlorous acid water by electrolysis in order to remove airborne bacteria, fungi, viruses, odors, etc. Conventional air purification devices generate hypochlorous acid water by repeating a cycle consisting of a period during which electricity is applied for electrolysis and a period during which electricity is not applied (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2019-30396 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional space purification devices have a cycle counting unit that counts the number of repeated cycles, and determine the power consumption during the power-on time, power-off time, and power-on time based on the count increments of the cycle counting unit. However, with conventional control, the hypochlorous acid water concentration after the power-on time may not necessarily reach the target hypochlorous acid water concentration.

[0005] Therefore, the present invention solves the above-mentioned conventional problems, and aims to provide a space purification device that determines the power supply time so that the hypochlorous acid water concentration after the power supply time has elapsed becomes the target hypochlorous acid water concentration. [Means for solving the problem]

[0006] To achieve this objective, the spatial purification device of the present invention comprises 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 the increased concentration of hypochlorous acid water per unit time based on a first sodium chloride concentration, which 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, a second calculation unit that calculates the required current flow time to achieve the target hypochlorous acid water concentration based on the target hypochlorous acid water concentration of the electrolytic cell, the first chlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell before current is passed through the electrode unit, and the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and an electrode control unit that passes current through the electrode unit for the required current flow time calculated by the second calculation unit, thereby achieving the desired objective. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a space purification device that determines the power-on time so that the concentration of hypochlorous acid water after the power-on time has elapsed becomes a target concentration of hypochlorous acid water. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing the internal configuration of a space purification device according to Embodiment 1. FIG. [Figure 2] 3 is a schematic functional block diagram of a control unit according to the first embodiment. FIG. [Figure 3] 5 is a flowchart showing a control procedure performed by a control unit according to the first embodiment. [Figure 4] FIG. 10 is a diagram showing the internal configuration of a space purification device according to a second embodiment. [Figure 5] FIG. 10 is a schematic functional block diagram of a control unit according to a second embodiment. [Figure 6] FIG. 10 is a diagram showing the data structure of a hypochlorous acid consumption amount table. [Figure 7] 10 is a flowchart showing a control procedure performed by a control unit according to the second embodiment. [Figure 8] FIG. 11 is a schematic functional block diagram of a control unit according to a third embodiment. [Figure 9] FIG. 10 is a schematic functional block diagram of a control unit according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiments of the present invention will be described with reference to the drawings. However, the embodiments shown below are merely examples for embodying the technical concept of the present invention, and the present invention is not limited to the following. Unless otherwise specified, numerical values, materials, shapes, relative positions, etc. described in the embodiments are merely examples and are not intended to limit the scope of the present invention.

[0010] (Embodiment 1) First, a description will be given of an embodiment of the present invention, that is, a space purification device 1000. FIG.

[0011] 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.

[0012] 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.

[0013] The water supply unit 110 is a tank that stores water inside, and is detachable from the electrolytic cell 100. A lid 112 is provided over 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. When the opening / closing part is opened, water from the water supply unit 110 is supplied to the electrolytic cell 100. Specifically, when the water supply unit 110 is attached to the electrolytic cell 100 with its opening facing downward, the opening / closing part opens. In other words, when the water supply unit 110 containing water is attached to the electrolytic cell 100, the opening / closing part opens, supplying water to the electrolytic cell 100 and causing the water to accumulate in the electrolytic cell 100. When the water level in the electrolytic cell 100 rises and reaches the position of the lid 112, the opening of the water supply unit 110 is sealed with water, and water supply stops. If water remains inside the water supply unit 110, the water inside the water supply unit 110 is supplied to the electrolytic cell 100 whenever the water level inside the electrolytic cell 100 drops. As a result, the water level inside the electrolytic cell 100 is kept constant. Note that the water supply unit 110 does not have to be a tank for storing water. In that case, tap water may be used to supply water to the electrolytic cell 100. When the water level inside the electrolytic cell 100 drops, tap water may be supplied until the water level inside the electrolytic cell 100 rises to a predetermined level.

[0014] 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 when the control unit 500 issues an instruction to feed the electrolysis accelerator 310, it rotates a tablet feed member (not shown). When the tablet feed member rotates, the electrolysis accelerator 310 drops into the electrolytic bath 100. The electrolysis accelerator feed unit 300 counts the number of electrolysis accelerators 310 that have dropped into the electrolytic bath 100, and when it determines that one tablet of electrolysis accelerator 310 has dropped into the electrolytic bath 100, it stops the rotation of the tablet feed member. In other words, the electrolysis accelerator feed unit 300 feeds the electrolysis accelerator 310 into the electrolytic bath 100. 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 electrolytic bath 100, producing water containing chloride ions in the electrolytic bath 100. That is, the electrolytic cell 100 mixes the electrolysis promoter 310 with water.

[0015] 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, producing hypochlorous acid water (electrolyzed water).

[0016] The electrolytic water supply unit 120 includes a water supply pump 122 and a water supply pipe 124 .

[0017] The water supply pump 122 is disposed in the electrolytic cell 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 cell 100 toward the water supply pipe 124.

[0018] 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. 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.

[0019] 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 electrolytic water supply unit 120. In other words, it stores hypochlorous acid water produced in the electrolytic bath 100. The septic tank 200 is provided with a purification unit 400.

[0020] The purification unit 400 includes a fan and a filter. The fan, for example, is a sirocco fan, and rotates under the control of the control unit 500. As the fan rotates, air is drawn into the space purification device 1000 through an air intake provided in the housing of the space purification device 1000. The filter is a component that brings the hypochlorous acid water stored in the septic tank 200 into contact with the indoor air that has been introduced into the space purification device 1000 by the fan. The filter is cylindrical and has holes around its circumference that allow air to flow through. One end of the filter is immersed in the hypochlorous acid water stored in the septic tank 200 to retain water, and the filter is built into the septic tank 200 in a rotatable configuration around its central axis. The filter is rotated by a drive unit, continuously bringing the hypochlorous acid water into contact with the indoor air.

[0021] 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 of the space purification device 1000 via the filter, fan, and air outlet in that order. This causes gas containing hypochlorous acid water in the septic tank 200 to be released to the outside. In other words, the purification unit 400 purifies the space using the hypochlorous acid water stored in the septic tank 200.

[0022] Furthermore, the electrolytic cell 100 is equipped with an electrolytic cell full float 130, and the septic tank 200 is equipped with a septic tank full float 210. The electrolytic cell full float 130 and the septic tank full float 210 detect whether water or hypochlorous acid water is present. Here, water, hypochlorous acid water, and a mixture of water and hypochlorous acid water are collectively referred to as "water." The electrolytic cell 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 unit (not shown). When water is present up to the float's position, 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 is not present up to the float's position, the detection unit cannot detect the magnet attached to the float.

[0023] 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.

[0024] 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 feeding unit 300, and the septic unit 400. Details of the processing by the control unit 500 will be described later.

[0025] Here, an example of the flow from the generation of hypochlorous acid water to its release will be described.

[0026] First, assume that there is no water in the electrolytic bath 100 and the septic tank 200. This corresponds to, for example, a case where the space purification device 1000 is installed after being purchased, or a case where there is no water in the electrolytic bath 100 and the septic tank 200 after draining the water and performing maintenance such as cleaning.

[0027] 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 part of the lid 112 opens, and 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 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 is full or not can be determined from the detection result of the electrolytic cell full-water float 130.

[0028] The electrolysis accelerator feed unit 300 drops the electrolysis accelerator 310 into the electrolysis bath 100, and the submerged electrolysis accelerator 310 dissolves in the 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.

[0029] 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.

[0030] When hypochlorous acid water having the target hypochlorous acid concentration is generated, the control unit 500 operates the water supply pump 122 to supply 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. The control unit 500 operates the purification unit 400 to release the air that has come into 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 come into contact with the hypochlorous acid water in the septic tank 200 to the outside of the space purification device 1000, the level of hypochlorous acid water in the septic tank 200 decreases over time.

[0031] When the water supply pump 122 operates, the level of hypochlorous acid water in the electrolytic cell 100 drops. However, when the opening and closing part of the lid 112 of the water supply part 110 is opened, water is supplied from the water supply part 110 to the electrolytic cell 100, and the water level in the electrolytic cell 100 is kept constant.

[0032] 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. When the water level in the electrolytic cell 100 drops, tap water may be supplied until the water level in the electrolytic cell 100 becomes full.

[0033] 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, thereby bringing the concentration of hypochlorous acid water in the electrolytic bath 100 back to the target concentration of hypochlorous acid water. The method for calculating the current application time will be described later.

[0034] As mentioned above, the level of hypochlorous acid water in the septic tank 200 decreases over time, so 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 gas containing hypochlorous acid water.

[0035] Next, the functions and control flow of the control unit 500 according to this embodiment will be described with reference to Fig. 2. Fig. 2 is a schematic functional block diagram of the control unit 500 according to this embodiment. The control unit 500 includes an electrolysis accelerator supply control unit 560, a first calculation unit 510, a memory unit 570, a second calculation unit 512, an electrode control unit 540, a third calculation unit 514, an electrolyzed 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.

[0036] The electrolysis accelerator supply control unit 560 controls the supply of the electrolysis accelerator 310 by the electrolysis accelerator supply unit 300 .

[0037] The first calculation unit 510 calculates the increased concentration of hypochlorous acid water per unit time based on 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, and a preset hypochlorous acid generation efficiency per unit time. The addition of the electrolysis accelerator 310 to the electrolytic bath 100 may be performed by the electrolysis accelerator addition unit 300 in response to an instruction from the electrolysis accelerator addition control unit 560, or may be performed by the user. Specific explanations will be given below using numerical values, but these numerical values ​​are merely examples and other numerical values ​​may be used.

[0038] First, the first calculation unit 510 calculates a first sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after a change due to the addition of the electrolysis accelerator 310 to the electrolytic cell 100. When the electrolytic cell 100 and the septic tank 200 are empty of water and water is supplied to the electrolytic cell 100 from the water supply unit 110, the first sodium chloride concentration is 0 mg / L (liters). If the capacity of the electrolytic cell 100 is 1 L and the weight of the electrolysis accelerator 310 is 500 mg, the calculation formula is: first sodium chloride concentration after a change due to the addition of the electrolysis accelerator 310 to the electrolytic cell 100 = weight of the electrolysis accelerator 310 ÷ capacity of the electrolytic cell 100 = 500 mg / L ÷ 1 L = 500 mg / L. The capacity of the electrolytic cell 100 and the weight of the electrolysis accelerator 310 are stored in advance in the storage unit 570. The storage unit 570 is a so-called memory, and various values ​​are stored in the storage unit 570.

[0039] Next, the first calculation unit 510 acquires a preset hypochlorous acid generation efficiency per unit time from the memory 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. 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, and the like. In this embodiment, as an example, the hypochlorous acid generation efficiency per unit time is set to 1 [% / min] (min:minute).

[0040] Next, the first calculation unit 510 calculates the increased concentration of hypochlorous acid water per unit time. The calculation formula is: 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)].

[0041] The second calculation unit 512 calculates the required power application time to achieve the target hypochlorous acid water concentration based on the target hypochlorous acid water concentration in the electrolytic cell 100, the primary chlorous acid water concentration which is the hypochlorous acid water concentration in the electrolytic cell 100 before power 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.

[0042] Specifically, first, the second calculation unit 512 acquires the target hypochlorous acid water concentration of the electrolytic bath 100 from the memory unit 570. In this embodiment, the target hypochlorous acid water concentration is set to 10 [ppm] (ppm: parts per million). The target hypochlorous acid water concentration may also be changeable by the user. For example, the user may set the target hypochlorous acid water concentration on a remote controller (not shown) or the like, 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.

[0043] 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.

[0044] Next, the second calculation unit 512 calculates the required energization time to achieve the target hypochlorous acid water concentration. The calculation formula is: Required energization time = (target hypochlorous acid water concentration - hypochlorous acid water concentration before energization) ÷ Increase in hypochlorous acid water concentration per unit time calculated by the first calculation unit 510 = (10 [ppm] - 0 [ppm]) ÷ 5 [mg / (L × min)] = 2 [min].

[0045] 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 allows the electrolytic cell 100 to produce hypochlorous acid water with a target hypochlorous acid water concentration.

[0046] The third calculation unit 514 calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after energization by the electrode unit 140, based on the first sodium chloride concentration, the increasing 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. 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.

[0047] Specifically, the third calculation unit 514 first acquires the first sodium chloride concentration, the hypochlorous acid water concentration increase per unit time, and the required energization time. In this embodiment, the first sodium chloride concentration = 500 [mg / L], the hypochlorous acid water concentration increase per unit time = 5 [mg / (L × min)], and the required energization time = 2 [min] are acquired.

[0048] 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 energization time) = 500 [mg / L] - (5 [mg / (L x min)] x 2 [min]) = 490 [mg / L]. This makes it possible to determine the sodium chloride concentration in the electrolytic cell 100 after energization by the electrode unit 140.

[0049] 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 of water. Whether the septic tank 200 is full of water can be determined based on the detection result of the septic tank full float 210.

[0050] The fourth calculation unit 516 calculates the amount of hypochlorous acid water delivered by the electrolyzed water supply unit 120. In this embodiment, as an example, it is assumed that the time taken for the electrolyzed water supply unit 120 to deliver water until the septic tank 200 is full is 5 seconds. The amount of water delivered per unit time is 50 mL / s. The amount of water delivered per unit time is a value determined in advance by experiment or the like, and varies depending on the water delivery capacity of the electrolyzed water supply unit 120. The amount of water delivered per unit time is stored in the memory unit 570.

[0051] The fourth calculation unit 516 calculates the amount of hypochlorous acid water to be fed. The calculation formula is: amount of hypochlorous acid water to be fed = amount of water fed per unit time × water feeding time = 50 [mL / s] × 5 [s] = 250 [mL].

[0052] The fifth calculation unit 518 calculates a third sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after the electrolyzed water supply unit 120 has supplied electrolyzed water, based on the second sodium chloride concentration calculated by the third calculation unit 514, the amount of hypochlorous acid water supplied calculated by the fourth calculation unit 516, and the capacity of the electrolytic cell 100. The sodium chloride concentration in the electrolytic cell 100 after the electrolyzed water supply is lower than the sodium chloride concentration in the electrolytic cell 100 before the electrolyzed water supply due to the water supplied by the water supply unit 110.

[0053] 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].

[0054] Next, the fifth calculation unit 518 calculates the third sodium chloride concentration. The calculation formula is: 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 the electrolyzed water supply unit 120 has supplied the electrolyzed water.

[0055] The sixth calculation unit 520 calculates the secondary hypochlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell 100 after the hypochlorous acid water is fed by the electrolyzed water supply unit 120, based on the target hypochlorous acid water concentration, the amount of hypochlorous acid water fed calculated by the fourth calculation unit 516, and the capacity of the electrolytic cell 100. The hypochlorous acid water concentration in the electrolytic cell 100 after the hypochlorous acid water is fed is lower than the hypochlorous acid water concentration 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.

[0056] 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 this 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].

[0057] Next, the sixth calculation unit 520 calculates the concentration of the secondary chlorous acid water. The calculation formula is: Secondary chlorous acid water concentration = Target hypochlorous acid water concentration - (Target hypochlorous acid water concentration x (Amount of hypochlorous acid water supplied ÷ Capacity of electrolytic cell 100) = 10 [ppm] - (10 [ppm] x (250 [mL] ÷ 1000 [mL])) = 7.5 [ppm]. This makes it possible to determine the concentration of hypochlorous acid water in the electrolytic cell 100 after the hypochlorous acid water has been supplied.

[0058] 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.

[0059] Specifically, first, the first change 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 calculation unit 510 or the second calculation unit 512. In this embodiment, the first change unit 522 acquires the pre-change first sodium chloride concentration = 500 [mg / L] and the pre-change primary chlorous acid water concentration = 0 [ppm].

[0060] The first change unit 522 changes the pre-change first sodium chloride concentration = 500 [mg / L] to the third sodium chloride concentration = 367.5 [mg / L] calculated by the fifth calculation unit 518, and changes the pre-change primary chlorous acid water concentration = 0 [ppm] to the secondary chlorous acid water concentration = 7.5 [ppm] calculated by the sixth calculation unit. 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 primary chlorous acid water concentration to the latest hypochlorous acid water concentration of the electrolytic bath 100.

[0061] 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.

[0062] 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].

[0063] Next, the first calculation unit 510 calculates the new increase in concentration of hypochlorous acid water per unit time. The specific calculation formula is: 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)].

[0064] 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 increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510.

[0065] 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)].

[0066] Next, the second calculation unit 512 calculates a new required energization time. The specific calculation formula is: new required energization time = (target hypochlorous acid water concentration - changed primary chlorous 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].

[0067] The electrode control unit 540 applies current to the electrode unit 140 for the new required current application time calculated by the second calculation unit 512. In the present embodiment, the second calculation unit 512 applies current to the electrode unit 140 for the new required current application time = 0.68 [min]. This allows the electrolytic cell 100 to again produce hypochlorous acid water with the target hypochlorous acid water concentration.

[0068] Thereafter, the control unit 500 repeats the calculation by the third calculation unit 514, the calculation by the fourth calculation unit 516, the calculation by the fifth calculation unit 518, the calculation by the sixth calculation unit 520, the change by the first change unit 522, the calculation by the first calculation unit 510, and the calculation by the second calculation unit 512. In other words, the control unit 500 repeats the following: change of the first sodium chloride concentration and the change of the primary chlorous acid water concentration by the first change unit 522, calculation of a new increased concentration of hypochlorous acid water per unit time by the first calculation unit 510, calculation of a new required current application time by the second calculation unit 512, and control of current application for the new required current application time by the electrode control unit 540. This allows the hypochlorous acid water concentration in the electrolytic bath 100 to be continuously maintained at the target hypochlorous acid water concentration.

[0069] Each functional block of the control unit 500 can be realized in hardware terms by elements and mechanical devices such as a computer CPU (Central Processing Unit), and in software terms by a computer program, etc. However, here, functional blocks realized by the cooperation of these elements are depicted. Therefore, these functional blocks can be realized in various forms by combining hardware and software.

[0070] A flow chart of the control unit 500 having the above configuration will be described below. Fig. 3 is a flow chart showing the control of the control unit 500 according to this embodiment.

[0071] First, the first calculation unit 510 calculates the increasing concentration of hypochlorous acid water per unit time (S10). The second calculation unit 512 calculates the current application time required to achieve the target hypochlorous acid water concentration (S12). 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 (S14). This allows the electrolytic cell 100 to produce hypochlorous acid water with the target hypochlorous acid water concentration.

[0072] The third calculation unit 514 calculates the second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after current is applied by the electrode unit 140 (S16). This makes it possible to determine the sodium chloride concentration in the electrolytic cell 100 after current is applied by the electrode unit 140.

[0073] The electrolyzed water supply control unit 550 supplies hypochlorous acid water to the septic tank 200 by the electrolyzed water supply unit 120 until the septic tank 200 is filled with water (S18). This allows hypochlorous acid water having a target hypochlorous acid concentration to be supplied to the septic tank 200.

[0074] The fourth calculation unit 516 calculates the amount of hypochlorous acid water supplied by the electrolyzed water supply unit 120 (S20). The fifth calculation unit 518 calculates a third sodium chloride concentration, which is the sodium chloride concentration in the electrolytic bath 100 after the electrolyzed water supply unit 120 has supplied the electrolyzed water (S22). This makes it possible to determine the sodium chloride concentration in the electrolytic bath 100 after the electrolyzed water supply unit 120 has supplied the electrolyzed water.

[0075] 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 hypochlorous acid water is supplied by the electrolytic water supply unit 120 (S24). This makes it possible to grasp the concentration of hypochlorous acid water in the electrolytic bath 100 after the hypochlorous acid water is supplied.

[0076] 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 (S26).

[0077] 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 (S28).

[0078] 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 (S30).

[0079] The electrode control unit 540 energizes the electrode unit 140 for the new required energization time calculated by the second calculation unit 512 (S32). This allows the electrolytic bath 100 to again produce hypochlorous acid water with the target hypochlorous acid water concentration. Thereafter, the process returns to step S16. The control unit 500 repeats steps S16 to S32. This allows the hypochlorous acid water concentration in the electrolytic bath 100 to be continuously maintained at the target hypochlorous acid water concentration.

[0080] (Embodiment 2) The second embodiment will be described with reference to Fig. 4, focusing on the differences from the first embodiment. Fig. 4 is a diagram showing the internal configuration of a space purification device 2000 in the second embodiment. The space purification device 2000 has a partially different structure from the space purification device 1000. The differences between the space purification device 2000 and the space purification device 1000 will be described.

[0081] The space purification device 2000 does not have the electrolytic water supply unit 120, septic tank 200, or septic tank full float 210 of the space purification device 1000, and the control unit 500 has been changed to a control unit 600. Furthermore, while the septic tank 200 in the space purification device 1000 is equipped with a purification unit 400, the space purification device 2000 is equipped with a purification unit 401 in the electrolytic cell 100. In other words, the space purification device 2000 is equipped with the electrolytic cell 100, the water supply unit 110, the electrolysis accelerator input unit 300, the electrode unit 140, the electrolytic cell full float 130, and the control unit 600.

[0082] The electrolytic bath 100, water supply unit 110, electrolysis accelerator feeding unit 300, and electrode unit 140 have the same configurations as in embodiment 1. However, the difference is that the electrolysis accelerator feeding unit 300 rotates the tablet feeding member when an instruction to feed the electrolysis accelerator 310 is received from the control unit 600, not the control unit 500. The electrolytic bath 100 is provided with a purification unit 401.

[0083] The purification unit 401 includes a fan and a filter. The fan rotates under the control of the control unit 600. As the fan rotates, air is drawn into the space purification device 2000 through an air intake provided in the housing of the space purification device 2000. The filter is a component that brings the hypochlorous acid water stored in the electrolytic cell 100 into contact with the indoor air that has been introduced into the space purification device 2000 by the fan. The filter is cylindrical and has holes around its circumference that allow air to flow through. One end of the filter is immersed in the hypochlorous acid water stored in the electrolytic cell 100 so that it can retain water, and the filter is built into the electrolytic cell 100 in a configuration that allows it to rotate around its central axis. The filter is rotated by the drive unit, continuously bringing the hypochlorous acid water into contact with the indoor air.

[0084] An air passage is formed inside the space purification device 2000, extending from the air intake to the filter, fan, and air outlet. When the fan rotates, the outside air is sucked in through the air intake and enters the air passage, and is blown out of the space purification device 2000 via the filter, fan, and air outlet, in that order. This causes gas containing hypochlorous acid water in the electrolytic cell 100 to be released to the outside. In other words, the purification unit 401 purifies the space using the hypochlorous acid water stored in the electrolytic cell 100.

[0085] The electrolytic cell full float 130 provided in the electrolytic cell 100 is the same as in embodiment 1. The electrolytic cell full float 130 transmits the detection result to the control unit 600.

[0086] 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.

[0087] Here, an example of the flow from generation to release of hypochlorous acid water in the second embodiment will be described.

[0088] First, assume that there is no water in the electrolytic bath 100. This corresponds to, for example, a state in which the space purification device 2000 is installed after purchase, or a state in which there is no water even after draining the water from the electrolytic bath 100 and performing maintenance such as cleaning.

[0089] 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, 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 referred to as the full water state. Alternatively, tap water may be supplied until the water level in the electrolytic cell 100 reaches the full water state.

[0090] The electrolysis accelerator feed unit 300 drops the electrolysis accelerator 310 into the electrolysis bath 100, and the submerged electrolysis accelerator 310 dissolves in the 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.

[0091] The control unit 600 electrolyzes water containing chloride ions to generate hypochlorous acid water by applying current to the electrode unit 140. At this time, current is applied for the time required to achieve the target hypochlorous acid water concentration in the electrode unit 140. As a result, hypochlorous acid water having the target hypochlorous acid water concentration is generated.

[0092] 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 kept constant.

[0093] However, 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. 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 the full level.

[0094] 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, thereby bringing the concentration of hypochlorous acid water in the electrolytic bath 100 to the target concentration of hypochlorous acid water. The method for calculating the current application time will be described later. This allows the space purification device 2000 to continue emitting gas containing hypochlorous acid water.

[0095] Next, the functions and control flow of the control unit 600 according to the second embodiment will be described with reference to Fig. 5. Fig. 5 is a schematic functional block diagram of the control unit 600 according to the present embodiment. The control unit 600 does not include the electrolyzed 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 of the control unit 500, and instead includes a seventh calculation unit 524, an eighth calculation unit 526, and a second change unit 528. In other words, the control unit 600 includes an electrolysis accelerator supply control unit 560, a first calculation unit 510, a memory unit 570, a second calculation unit 512, an electrode control unit 540, a third calculation unit 514, a seventh calculation unit 524, an eighth calculation unit 526, and a second change unit 528.

[0096] The electrolysis accelerator supply control unit 560 controls the supply of the electrolysis accelerator 310 by the electrolysis accelerator supply unit 300 .

[0097] 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 preset hypochlorous acid production efficiency per unit time. Specific explanations will be given below using numerical values, but the numerical values ​​are merely examples and other numerical values ​​may be used.

[0098] First, the first calculation unit 510 calculates a first sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after a change due to the addition of the electrolysis accelerator 310 to the electrolytic cell 100. When the electrolytic cell 100 is filled with water after being empty, as water is supplied from the water supply unit 110 to the electrolytic cell 100, the first sodium chloride concentration is 0 mg / L. Assuming that the capacity of the electrolytic cell 100 is 1 L and the weight of the electrolysis accelerator 310 is 500 mg, the calculation formula is: first sodium chloride concentration after a change due to the addition of the electrolysis accelerator 310 to the electrolytic cell 100 = weight of the electrolysis accelerator 310 ÷ capacity of the electrolytic cell 100 = 500 mg / L ÷ 1 L = 500 mg / L. The capacity of the electrolytic cell 100 and the weight of the electrolysis accelerator 310 are stored in advance in the storage unit 570. The storage unit 570 is a so-called memory, and various values ​​are stored therein.

[0099] 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 this embodiment, as an example, the hypochlorous acid generation efficiency per unit time is set to 1 [% / min].

[0100] Next, the first calculation unit 510 calculates the increased concentration of hypochlorous acid water per unit time. The calculation formula is: 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)].

[0101] The second calculation unit 512 calculates the required power application time to achieve the target hypochlorous acid water concentration based on the target hypochlorous acid water concentration in the electrolytic cell 100, the primary chlorous acid water concentration which is the hypochlorous acid water concentration in the electrolytic cell 100 before power 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.

[0102] 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].

[0103] 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.

[0104] Next, the second calculation unit 512 calculates the required energization time to achieve the target hypochlorous acid water concentration. The calculation formula is: Required energization time = (target hypochlorous acid water concentration - hypochlorous acid water concentration before energization) ÷ Increase in hypochlorous acid water concentration per unit time calculated by the first calculation unit 510 = (10 [ppm] - 0 [ppm]) ÷ 5 [mg / (L × min)] = 2 [min].

[0105] 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 allows the electrolytic cell 100 to produce hypochlorous acid water with a target hypochlorous acid water concentration.

[0106] The third calculation unit 514 calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after energization by the electrode unit 140, based on the first sodium chloride concentration, the increasing concentration of the hypochlorous acid water per unit time, and the required energization time. 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.

[0107] Specifically, the third calculation unit 514 first acquires the first sodium chloride concentration, the hypochlorous acid water concentration increase per unit time, and the required energization time. In this embodiment, the first sodium chloride concentration = 500 [mg / L], the hypochlorous acid water concentration increase per unit time = 5 [mg / (L × min)], and the required energization time = 2 [min] are acquired.

[0108] 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 energization time) = 500 [mg / L] - (5 [mg / (L x min)] x 2 [min]) = 490 [mg / L]. This makes it possible to determine the second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after energization by the electrode unit 140.

[0109] 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 this embodiment, the seventh calculation unit 524 uses a hypochlorous acid consumption amount table to calculate the amount of hypochlorous acid reduced.

[0110] The hypochlorous acid consumption table will be described with reference to FIG. 6. FIG. 6 is a diagram showing the data structure of the hypochlorous acid consumption table stored in the memory unit 570 of the control unit 600, and is an example of a hypochlorous acid consumption table. The hypochlorous acid consumption table stores a plurality of hypochlorous acid consumption amounts per predetermined unit time corresponding to predetermined air volumes. The hypochlorous acid consumption amount per predetermined unit time corresponding to predetermined air volumes is a value determined in advance by experiments or the like, and can be set arbitrarily.

[0111] 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]. In the hypochlorous acid consumption table, the larger the air volume, the larger the hypochlorous acid consumption per corresponding unit time.

[0112] In this embodiment, the airflow rate of the fan of the purification unit 401 can be set by the user, and the user can set the airflow rate in an airflow rate setting unit (not shown) of the space purification device 2000. The airflow rates that can be set by the user are any of a first airflow rate, a second airflow rate, a third airflow rate, a fourth airflow rate, and a fifth airflow rate. In this embodiment, it is assumed that the user has set the third airflow rate in the airflow rate setting unit. The control unit 600 acquires the third airflow rate set by the user and stores it in the memory unit 570.

[0113] The seventh calculation unit 524 obtains the hypochlorous acid consumption per unit time based on the airflow rate set by the user and the hypochlorous acid consumption table stored in the memory unit 570. Specifically, when the airflow rate set by the user stored in the memory unit 570 is the third airflow rate, 0.22 mg / min is obtained as the hypochlorous acid consumption per unit time from the hypochlorous acid consumption table. The seventh calculation unit 524 calculates the hypochlorous acid loss from the electrolytic bath 100 over a predetermined purification time. In this embodiment, the predetermined purification time is 30 min. The formula for calculating the hypochlorous acid loss from the electrolytic bath 100 over a predetermined purification time is: Hypochlorous Acid Loss from the Electrolytic Bath 100 over a predetermined purification time = Acquired Hypochlorous Acid Consumption per Unit Time × Purification Time = 0.22 mg / min × 30 min = 6.6 mg. This allows the amount of hypochlorous acid loss from the electrolytic bath 100 over a predetermined purification time to be determined.

[0114] The eighth calculation unit 526 calculates the tertiary hypochlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic bath 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. The hypochlorous acid water concentration in the electrolytic bath 100 after the hypochlorous acid has been reduced by purification becomes lower than the hypochlorous acid water concentration in the electrolytic bath 100 before the hypochlorous acid reduction (target hypochlorous acid water concentration) due to the water supplied by the water supply unit 110.

[0115] Specifically, first, the eighth calculation unit 526 acquires the target hypochlorous acid water concentration and the hypochlorous acid reduction amount calculated by the seventh calculation unit 524. In this embodiment, the eighth calculation unit 526 acquires the target hypochlorous acid water concentration = 10 [ppm] and the hypochlorous acid reduction amount = 6.6 [mg] calculated by the seventh calculation unit 524.

[0116] 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 calculated by the seventh calculation unit 524. The calculation formula is: Amount of hypochlorous acid in the electrolytic bath 100 before the decrease in the amount of hypochlorous acid = Target concentration of hypochlorous acid water × Capacity of the electrolytic bath 100 = 10 [ppm = mg / L] × 1 [L] = 10 [mg].

[0117] Next, eighth calculation unit 526 calculates the amount of hypochlorous acid in electrolytic bath 100 after the decrease in the amount of hypochlorous acid. The calculation formula is: Amount of hypochlorous acid in electrolytic bath 100 after the decrease in the amount of hypochlorous acid = Amount of hypochlorous acid in electrolytic bath 100 before the decrease in the amount of hypochlorous acid - Amount of hypochlorous acid decreased = 10 [mg] - 6.6 [mg] = 3.4 [mg].

[0118] Next, the eighth calculation unit 526 calculates the concentration of the tertiary chlorous acid water. The calculation formula is: Concentration of the tertiary chlorous acid water = Amount of hypochlorous acid in the electrolytic bath 100 after the reduction in the amount of hypochlorous acid ÷ Capacity of the electrolytic bath 100 = 3.4 [mg] ÷ 1 [L] = 3.4 [mg / L = ppm]. This makes it possible to determine the concentration of the hypochlorous acid water in the electrolytic bath 100 after the reduction in the amount of hypochlorous acid due to purification.

[0119] 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.

[0120] 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. 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].

[0121] The second change unit 528 changes the pre-change first sodium chloride concentration = 500 [mg / L] to the second sodium chloride concentration = 490 [mg / L] calculated by the third calculation unit 514, and changes the pre-change primary chlorous acid water concentration = 0 [ppm] to the tertiary chlorous acid water concentration = 3.4 [ppm] calculated by the eighth calculation unit 526. 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 primary chlorous acid water concentration to the latest hypochlorous acid water concentration of the electrolytic bath 100.

[0122] The first calculation unit 510 calculates a new increasing concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration (first sodium chloride concentration after change) changed by the second change unit 528 and the predetermined hypochlorous acid generation efficiency per unit time.

[0123] 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].

[0124] Next, the first calculation unit 510 calculates the new increase in concentration of hypochlorous acid water per unit time. The specific calculation formula is: 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)].

[0125] 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 increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510.

[0126] 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)].

[0127] Next, the second calculation unit 512 calculates a new required energization time. The specific calculation formula is: new required energization time = (target hypochlorous acid water concentration - changed primary chlorous 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].

[0128] The electrode control unit 540 applies current to the electrode unit 140 for the new required current application time calculated by the second calculation unit 512. In the present embodiment, the second calculation unit 512 applies current to the electrode unit 140 for the new required current application time = 1.35 [min]. This allows the electrolytic cell 100 to again produce hypochlorous acid water with the target hypochlorous acid water concentration.

[0129] Thereafter, the control unit 500 repeats the calculation by the third calculation unit 514, the calculation by the seventh calculation unit 524, the calculation by the eighth calculation unit 526, the change by the second change unit 528, the calculation by the first calculation unit 510, and the calculation by the second calculation unit 512. In other words, the control unit 600 repeats the following: change of the first sodium chloride concentration and the change of the first chlorous acid water concentration by the second change unit 528, calculation of a new increased concentration of hypochlorous acid water per unit time by the first calculation unit 510, calculation of a new required current application time by the second calculation unit 512, and control of current application for the new required current application time by the electrode control unit 540. This allows the hypochlorous acid water concentration in the electrolytic bath 100 to be continuously maintained at the target hypochlorous acid water concentration.

[0130] Each functional block of the control unit 600 can also be realized in various ways by combining hardware and software.

[0131] A flow chart of the control unit 600 having the above configuration will be described below. Fig. 7 is a flow chart showing the control of the control unit 600 according to this embodiment.

[0132] First, the first calculation unit 510 calculates the increasing concentration of hypochlorous acid water per unit time (S40). The second calculation unit 512 calculates the current application time required to achieve the target hypochlorous acid water concentration (S42). 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 (S44). This allows the electrolytic cell 100 to produce hypochlorous acid water with the target hypochlorous acid water concentration.

[0133] The third calculation unit 514 calculates the second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell 100 after current is applied by the electrode unit 140 (S46). This makes it possible to determine the sodium chloride concentration in the electrolytic cell 100 after current is applied by the electrode unit 140.

[0134] 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 (S48). This makes it possible to grasp the amount of hypochlorous acid reduced from the electrolytic bath 100.

[0135] The eighth calculation unit 526 calculates the tertiary chlorous acid water concentration, which is the concentration of hypochlorous acid water in the electrolytic bath 100 after the reduction of hypochlorous acid by purification (S50). This makes it possible to grasp the concentration of hypochlorous acid water in the electrolytic bath 100 after the reduction of hypochlorous acid by purification.

[0136] 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 (S52).

[0137] 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 (S54).

[0138] 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 (S56).

[0139] The electrode control unit 540 energizes the electrode unit 140 for the new required energization time calculated by the second calculation unit 512 (S58). This allows the electrolytic bath 100 to again produce hypochlorous acid water with the target hypochlorous acid water concentration. Thereafter, the process returns to step S46. The control unit 600 repeats steps S46 to S58. This allows the hypochlorous acid water concentration in the electrolytic bath 100 to be continuously maintained at the target hypochlorous acid water concentration.

[0140] As a result, even in the space purification device 2000 that does not include the purification 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.

[0141] (Embodiment 3) The third embodiment relates to the control of the supply of electrolysis accelerator 310. The internal configuration of the space purification device in the third embodiment is the same as that of the space purification device 1000 in the first embodiment. The schematic functional block diagram of the control unit 500 in the third embodiment is partially different from that in the first embodiment. Specifically, the control content of the electrolysis accelerator supply control unit 560 has been added, and a sodium chloride concentration addition unit 532 has been added. Figure 8 is a schematic functional block diagram of the control unit 500 according to the third embodiment.

[0142] If the required current-flow time calculated by the second calculation unit 512 is longer than the longest current-flow time, the electrolysis accelerator feeding control unit 560 issues a feeding instruction to the electrolysis accelerator feeding unit 300, and the electrolysis accelerator feeding unit 300 feeds the electrolysis accelerator 310. In other words, if the required current-flow time calculated by the second calculation unit 512 is longer than the longest current-flow time, the electrolysis accelerator feeding unit 300 feeds the electrolysis accelerator 310.

[0143] The maximum current-flow time is used to determine whether sodium chloride in the electrolytic cell 100 has become low and it is necessary to add an electrolysis accelerator 310 to the electrolytic cell 100, and can be set arbitrarily. In this embodiment, for example, if the maximum current-flow time is 10 minutes, the electrolysis accelerator feeding unit 300 feeds the electrolysis accelerator 310 if the required current-flow time is longer than 10 minutes.

[0144] By applying current to the electrode unit 140, water containing chloride ions is electrolyzed to generate hypochlorous acid, but sodium chloride is consumed in the generation of hypochlorous acid, resulting in a decrease in the sodium chloride concentration in the electrolytic cell 100. In other words, as hypochlorous acid generation continues, the sodium chloride concentration in the electrolytic cell 100 continues to decrease.

[0145] A decrease in the sodium chloride concentration in the electrolytic bath 100 reduces the increased concentration of hypochlorous acid water per unit time, resulting in a longer required current application time and making it impossible to stably supply hypochlorous acid water at the target hypochlorous acid water concentration to the septic tank 200. Therefore, if the required current application time calculated by the second calculation unit 512 is longer than the longest current application time, the electrolysis promoter feeding unit 300 feeds the electrolysis promoter 310. This increases the sodium chloride concentration in the electrolytic bath 100 and shortens the required current application time, making it possible to stably supply hypochlorous acid water at the target hypochlorous acid water concentration to the septic tank 200.

[0146] When the electrolysis accelerator 310 is introduced by the electrolysis accelerator introduction unit 300, the sodium chloride concentration in the electrolytic cell 100 is added by the sodium chloride concentration addition unit 532.

[0147] After the electrolysis accelerator 310 is added by the electrolysis accelerator feeding unit 300, the sodium chloride concentration adding unit 532 adds the theoretical increase in sodium chloride concentration due to the addition of the electrolysis accelerator 310 to the sodium chloride concentration in the electrolytic bath 100. Below, specific examples are described using numerical values, but these numerical values ​​are merely examples. In this embodiment, it is assumed that one tablet of electrolysis accelerator 310 is added by the electrolysis accelerator feeding unit 300, and the weight of one tablet of electrolysis accelerator 310 (weight of sodium chloride) is 500 mg. The weight of the electrolysis accelerator 310 added by the electrolysis accelerator feeding unit 300 is stored in advance in the memory unit 570. Furthermore, as mentioned above, the capacity of the electrolytic bath 100 = 1 L is also stored in advance in the memory unit 570.

[0148] First, the sodium chloride concentration addition unit 532 calculates the theoretical increase in sodium chloride concentration due to the addition of the electrolysis accelerator 310. The weight of the electrolysis accelerator 310 added by the electrolysis accelerator addition unit 300 = 500 [mg], and the capacity of the electrolytic cell 100 = 1 [L], and the calculation formula is: theoretical increase = weight of the electrolysis accelerator 310 added by the electrolysis accelerator addition unit 300 ÷ capacity of the electrolytic cell 100 = 500 [mg] ÷ 1 [L] = 500 [mg / L].

[0149] Next, the sodium chloride concentration adding unit 532 adds the theoretical increase in sodium chloride concentration due to the addition of the electrolysis accelerator 310 to the sodium chloride concentration in the electrolytic bath 100. This makes it possible to determine the sodium chloride concentration in the electrolytic bath 100 after the addition of the electrolysis accelerator 310.

[0150] An example of the control flow will be explained below. For example, the first sodium chloride concentration is 100 [mg / L], the hypochlorous acid generation efficiency per unit time is 1 [% / min], the target hypochlorous acid water concentration is 20 [ppm], and the first chlorous acid water concentration is 8 [ppm].

[0151] First, the first calculation unit 510 calculates the increased concentration of hypochlorous acid water per unit time. The calculation formula is: increased concentration of hypochlorous acid water per unit time = first sodium chloride concentration × hypochlorous acid generation efficiency per unit time = 100 [mg / L] × 1 [% / min] = 1 [mg / (L × min)].

[0152] The second calculation unit 512 calculates the required energization time to achieve the target hypochlorous acid water concentration. The calculation formula is: Required energization time = (target hypochlorous acid water concentration - primary hypochlorous acid water concentration) ÷ Increase in hypochlorous acid water concentration per unit time = (20 [ppm] - 8 [ppm]) ÷ 1 [mg / (L × min)] = 12 [min].

[0153] Because the required current application time = 12 [min] calculated by the second calculation unit 512 is longer than the maximum current application time = 10 [min], the electrolysis accelerator feeding control unit 560 issues a feeding instruction to the electrolysis accelerator feeding unit 300, and the electrolysis accelerator feeding unit 300 feeds the electrolysis accelerator 310.

[0154] Next, the sodium chloride concentration adding unit 532 adds the theoretical increase in the sodium chloride concentration due to the addition of the electrolysis accelerator 310 to the first sodium chloride concentration. The calculation formula is: first sodium chloride concentration after addition = first sodium chloride concentration before addition + theoretical increase = 100 [mg / L] + 500 [mg / L] = 600 [mg / L]. In other words, the first sodium chloride concentration is updated to 600 [mg / L].

[0155] 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 and the preset hypochlorous acid generation efficiency per unit time. The calculation formula is: new increased concentration of hypochlorous acid water per unit time = first sodium chloride concentration after addition by the sodium chloride concentration addition unit 532 × hypochlorous acid generation efficiency per unit time = 600 [mg / L] × 1 [% / min] = 6 [mg / (L × min)].

[0156] The second calculation unit 512 calculates a new required energization time based on the target hypochlorous acid water concentration in the electrolytic cell 100, the primary chlorous acid water concentration, and the new increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit 510. The calculation formula is: new required energization time = (target hypochlorous acid water concentration - primary chlorous acid water concentration) ÷ new increased concentration of hypochlorous acid water per unit time = (20 [ppm] - 8 [ppm]) ÷ 6 [mg / (L × min)] = 2 [min].

[0157] The electrolysis accelerator feeding control unit 560 does not issue a feeding instruction to the electrolysis accelerator feeding unit 300 because the new required energization time (2 min) calculated by the second calculation unit 512 is less than or equal to the longest energization time (10 min), and the electrolysis accelerator feeding unit 300 does not feed the electrolysis accelerator 310.

[0158] The electrode control unit 540 energizes the electrode unit 140 for the new required energization time calculated by the second calculation unit 512. This allows hypochlorous acid water having the target hypochlorous acid water concentration to be produced in the electrolytic cell 100 within the longest energization time or less. As a result, hypochlorous acid water having the target hypochlorous acid water concentration can be stably supplied to the septic tank 200.

[0159] (Fourth embodiment) Embodiment 4 also relates to the control of the supply of electrolysis accelerator 310. The internal configuration of the space purification device in Embodiment 4 is the same as that of the space purification device 2000 in Embodiment 2. Furthermore, the schematic functional block diagram of the control unit 600 in Embodiment 4 is partially different from that in Embodiment 2. Specifically, the control content of the electrolysis accelerator supply control unit 560 and the sodium chloride concentration addition unit 532 are added. Figure 9 is a schematic functional block diagram of the control unit 600 according to Embodiment 4. The added control content of the electrolysis accelerator supply control unit 560 and the added content of the sodium chloride concentration addition unit 532 are the same as those in Embodiment 3, so a description thereof will be omitted.

[0160] In the space purification device 2000, water containing chloride ions is electrolyzed to generate hypochlorous acid by applying current to the electrode unit 140, but sodium chloride is consumed in the generation of hypochlorous acid, resulting in a decrease in the sodium chloride concentration in the electrolytic cell 100. In other words, as hypochlorous acid generation continues, the sodium chloride concentration in the electrolytic cell 100 continues to decrease.

[0161] A decrease in the sodium chloride concentration in the electrolytic cell 100 reduces the increased concentration of hypochlorous acid water per unit time, resulting in a longer required current flow time and making it impossible to stably maintain the hypochlorous acid water concentration in the electrolytic cell 100 at the target hypochlorous acid water concentration. Therefore, if the required current flow time calculated by the second calculation unit 512 is longer than the longest current flow time, the electrolysis enhancer feeding unit 300 feeds the electrolysis enhancer 310. This increases the sodium chloride concentration in the electrolytic cell 100, shortening the required current flow time, and as a result, the hypochlorous acid water concentration in the electrolytic cell 100 can be stably maintained at the target hypochlorous acid water concentration.

[0162] (Embodiment 5) The fifth embodiment relates to the control of the sodium chloride concentration adding unit. The control of the sodium chloride concentration adding unit 532 in the fifth embodiment is different from that in the third or fourth embodiment. This will be explained in detail below.

[0163] The sodium chloride concentration addition unit 532 performs a process a predetermined number of times after the electrolysis accelerator 310 is added by the electrolysis accelerator feeding unit 300, in which the sodium chloride concentration addition unit 532 adds a divided increase value, which is obtained by dividing a predetermined number of times from the theoretical increase in sodium chloride concentration due to the addition of the electrolysis accelerator 310, to the sodium chloride concentration in the electrolytic cell 100 per unit time. This will be explained in detail below.

[0164] The predetermined number of times is a value determined in advance through experiments, etc., and can be set arbitrarily. The predetermined number of times is stored in the storage unit 570.

[0165] The memory unit 570 also stores the time required to increase the sodium chloride concentration in the electrolytic cell 100 to the theoretical value (hereinafter referred to as the increase completion time). The increase completion time is the time required from when the electrolysis accelerator 310 is introduced into the electrolytic cell 100 until the electrolysis accelerator 310 has completely dissolved in the electrolytic cell 100, and is a value determined in advance by experiments or the like, and can be set arbitrarily.

[0166] When the electrolysis accelerator 310 is added to the electrolytic bath 100 at a sodium chloride concentration before the addition of the electrolysis accelerator 310, the electrolysis accelerator 310 begins to dissolve, and the sodium chloride concentration in the electrolytic bath 100 increases over time. Then, after the rise completion time has elapsed, the electrolysis accelerator 310 finishes dissolving, and the sodium chloride concentration in the electrolytic bath 100 after the electrolysis accelerator 310 has finished dissolving becomes a concentration that is increased by a theoretical increase value from the sodium chloride concentration in the electrolytic bath 100 before the addition of the electrolysis accelerator 310. In this embodiment, as an example, the theoretical increase value is 500 [mg / L], the predetermined number of times is 4, and the rise completion time is 2 [min].

[0167] First, the sodium chloride concentration adding unit 532 calculates the unit time using the following formula: unit time = time to complete rise / predetermined number of times = 2 [min] / 4 = 0.5 [min].

[0168] The sodium chloride concentration adding unit 532 calculates the divided increase value using the following formula: divided increase value = theoretical increase value / predetermined number of times = 500 [mg / L] / 4 = 125 [mg / L].

[0169] The sodium chloride concentration addition unit 532 performs division processing to add a divided increase value to the sodium chloride concentration in the electrolytic bath 100 after a unit time has elapsed since the addition of the electrolysis accelerator 310. That is, the sodium chloride concentration addition unit 532 performs division processing to add 125 [mg / L] to the sodium chloride concentration in the electrolytic bath 100 after 0.5 [min] has elapsed since the addition of the electrolysis accelerator 310.

[0170] The sodium chloride concentration addition unit 532 performs the division process every time a unit time elapses, and the division process is performed a predetermined number of times. That is, the sodium chloride concentration addition unit 532 performs the division process four times. As a result, the sodium chloride concentration in the electrolytic bath 100 after the rise completion time has elapsed is a concentration that has increased by the theoretical value from the sodium chloride concentration in the electrolytic bath 100 before the electrolysis accelerator 310 was added.

[0171] In the third and fourth embodiments, in order to simplify the control, the theoretical increase in sodium chloride concentration was added to the sodium chloride concentration in the electrolytic bath 100 immediately after the addition of the electrolysis accelerator 310, but the present embodiment provides control that is more suited to the actual behavior of the sodium chloride concentration. In other words, the sodium chloride concentration in the electrolytic bath 100 can be grasped with high accuracy, and therefore hypochlorous acid water with a target hypochlorous acid water concentration can be produced with high accuracy.

[0172] (Sixth embodiment) The sixth embodiment relates to the supply control of the electrolysis accelerator 310. The internal configuration of the space purification device in the sixth embodiment is the same as that of the space purification device 1000 in the third embodiment, and the schematic functional block diagram of the control unit 500 in the sixth embodiment is also the same as that in the third embodiment. The supply control of the electrolysis accelerator in the sixth embodiment differs in part from the supply control of the electrolysis accelerator 310 in the third embodiment. The following description will focus on the differences from the supply control of the electrolysis accelerator 310 in the third embodiment, and a description of the same control content will be omitted.

[0173] The electrolyzed water supply control unit 550 supplies hypochlorous acid water to the septic tank 200 by the electrolyzed water supply unit 120 every first hour.

[0174] The first time is a value determined in advance by experiments or the like, and can be set arbitrarily. The first time is stored in the memory unit 570. Hypochlorous acid water is supplied to the septic tank 200 by the electrolyzed water supply unit 120 every first hour, so that the space can be continuously purified using the hypochlorous acid water stored in the septic tank 200. The first time stores the time during which hypochlorous acid water is reliably stored in the septic tank 200 even after the first hour has elapsed since the previous supply of hypochlorous acid water.

[0175] If the required current-carrying time calculated by the second calculation unit 512 is longer than the first time, the electrolysis accelerator feeding control unit 560 issues a feeding instruction to the electrolysis accelerator feeding unit 300, and the electrolysis accelerator feeding unit 300 feeds the electrolysis accelerator 310. In other words, if the required current-carrying time calculated by the second calculation unit 512 is longer than the first time, the electrolysis accelerator feeding unit 300 feeds the electrolysis accelerator 310.

[0176] If the required energization time is longer than the first hour, the concentration of hypochlorous acid water in the electrolytic tank 100 will be lower than the target hypochlorous acid concentration when the electrolytic water supply unit 120 supplies hypochlorous acid water to the septic tank 200. In other words, the concentration of hypochlorous acid water in the septic tank 200 will be lower than the target hypochlorous acid concentration, and the amount of hypochlorous acid released to the outside will decrease. If the concentration of hypochlorous acid water in the septic tank 200 is lower than the target hypochlorous acid concentration, it may not be possible to efficiently purify the space.

[0177] As described above, as hypochlorous acid generation continues, the sodium chloride concentration in the electrolytic bath 100 continues to decrease. The decrease in the sodium chloride concentration in the electrolytic bath 100 reduces the increased concentration of hypochlorous acid water per unit time, resulting in a longer required energization time. If the required energization time is longer than the first hour, hypochlorous acid water at the target hypochlorous acid water concentration cannot be supplied to the septic tank 200. Therefore, if the required energization time calculated by the second calculation unit 512 is longer than the first hour, the electrolysis promoter supply unit 300 supplies the electrolysis promoter 310. This increases the sodium chloride concentration in the electrolytic bath 100 and shortens the required energization time, thereby enabling hypochlorous acid water at the target hypochlorous acid water concentration to be supplied to the septic tank 200.

[0178] An example of the control flow will be explained below.

[0179] First, the first calculation unit 510 calculates the increasing concentration of hypochlorous acid water per unit time. The second calculation unit 512 calculates the current application time required to achieve the target concentration of hypochlorous acid water.

[0180] If the required current application time calculated by the second calculation unit 512 is longer than the first time, the electrolysis accelerator supply control unit 560 issues a supply instruction to the electrolysis accelerator supply unit 300, and the electrolysis accelerator supply unit 300 supplies the electrolysis accelerator 310.

[0181] Next, the sodium chloride concentration adding unit 532 adds the theoretical increase in the sodium chloride concentration due to the addition of the electrolysis accelerator 310 to the first sodium chloride concentration. The first sodium chloride concentration is added by the sodium chloride concentration adding unit 532 to become a new first sodium chloride concentration. In other words, the addition method used by the sodium chloride concentration adding unit 532 can be the addition method described in embodiment 3 or embodiment 5.

[0182] 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 and the preset hypochlorous acid generation efficiency per unit time.

[0183] The second calculation unit 512 calculates a new required power supply time based on the target hypochlorous acid water concentration in the electrolytic cell 100, the primary hypochlorous acid water concentration, and the new increase in hypochlorous acid water concentration per unit time calculated by the first calculation unit 510.

[0184] If the new required current application time calculated by the second calculation unit 512 is equal to or shorter than the first hour, the electrolysis accelerator feeding control unit 560 does not issue a feeding instruction to the electrolysis accelerator feeding unit 300, and the electrolysis accelerator feeding unit 300 does not feed the electrolysis accelerator 310.

[0185] The electrode control unit 540 energizes the electrode unit 140 for the new required energization time calculated by the second calculation unit 512. This allows hypochlorous acid water having the target hypochlorous acid water concentration to be produced in the electrolytic cell 100 within the first hour or less, and as a result, hypochlorous acid water having the target hypochlorous acid water concentration can be stably supplied to the septic tank 200.

[0186] (Embodiment 7) The seventh embodiment relates to the control of current flow by the electrode control unit and the control of the supply of electrolysis accelerator 310. The control details of the electrode control unit and electrolysis accelerator supply control unit in the seventh embodiment are partially different from the control details of the third, fourth, and sixth embodiments. The following description will focus on the differences.

[0187] The electrode control unit 540 performs current control to alternately energize and de-energize the electrode unit 140. By providing a de-energized time, the electrode life of the electrode unit 140 can be extended.

[0188] If the timing of the instruction to supply the electrolysis accelerator feeding unit 300 is in the energized state, the electrolysis accelerator feeding control unit 560 waits until a de-energized time has elapsed, and then issues an instruction to supply the electrolysis accelerator feeding unit 300 in the de-energized state. The electrolysis accelerator feeding unit 300 then feeds the electrolysis accelerator 310. In other words, if the timing to supply the electrolysis accelerator 310 is in the energized state, the electrolysis accelerator feeding unit 300 waits until a de-energized state has elapsed, and then feeds the electrolysis accelerator 310 in the de-energized state.

[0189] If electrolysis promoter 310 is added while the power is on, the sodium chloride concentration in electrolytic cell 100 will change while the power is on. In other words, the hypochlorous acid concentration in electrolytic cell 100 after the power is turned on will not be the target hypochlorous acid concentration. By performing this control, the life of electrode unit 140 can be extended, and the hypochlorous acid concentration in electrolytic cell 100 after the power is turned on can be stably set to the target hypochlorous acid concentration.

[0190] (Embodiment 8) Embodiment 8 also relates to current control by the electrode control unit and supply control of electrolysis accelerator 310. The control details of the electrode control unit and electrolysis accelerator supply control unit in embodiment 8 also differ in part from the control details of embodiments 3, 4 and 6. The following description will focus on the differences.

[0191] The electrode control unit 540 alternately energizes and deenergizes the electrode unit 140, reverses the energization direction from the first energization direction after the total energization time in the first energization direction has elapsed for a second time, and provides a first deenergization time after the reversal of the energization direction. This will be described in detail below.

[0192] Electrode control unit 540 alternately energizes and de-energizes electrode unit 140, and can switch the direction of current flow through electrode unit 140 between a first current flow direction and a current flow direction opposite to the first current flow direction. In this embodiment, as an example, the first current flow direction is the direction of current flow from the positive electrode to the negative electrode of electrode unit 140, and the current flow direction opposite to the first current flow direction is the direction of current flow from the negative electrode to the positive electrode of electrode unit 140.

[0193] The electrode control unit 540 reverses the current flow direction from the first current flow direction after the total time of current flow in the first current flow direction has elapsed for a second time. Specifically, the electrode control unit 540 completes current flow while maintaining the current flow in the first current flow direction when the total time of current flow by the electrode unit 140 in the first current flow direction reaches the second time. After current flow in the first current flow direction is completed, the electrode control unit 540 causes the electrode unit 140 to have a non-current flow time that is at least equal to or longer than the first non-current flow time. Before the start of the next current flow, the electrode control unit 540 reverses the current flow direction of the electrode unit 140 from the first current flow direction and instructs the next current flow.

[0194] It is desirable to periodically change the direction of current flow to the electrode unit 140. This is because if current flow continues without changing the direction of current flow, scale will adhere to the surface of the electrode unit 140, resulting in a decrease in the efficiency of electrolysis and an early end of the electrode life. In other words, the second time is a time set to prevent a decrease in the efficiency of electrolysis and an early end of the electrode life, and is a value determined in advance by experiments or the like, and can be set arbitrarily. The second time is stored in the memory unit 570.

[0195] Furthermore, if the current flow direction of the electrode unit 140 is reversed without providing a non-energization time equal to or longer than the first non-energization time, the electrostatic charge generated on the electrode unit 140 will peel off the catalyst layer on the electrode surface. This will cause the electrode to deteriorate, resulting in a decrease in electrolysis efficiency and an early end of electrode life. In other words, the first non-energization time is a time provided to prevent a decrease in electrolysis efficiency and an early end of electrode life, and is a value determined in advance through experiments or the like, and can be set arbitrarily. The first non-energization time is stored in the memory unit 570.

[0196] If the timing of the instruction to supply the electrolysis accelerator to the electrolysis accelerator supply unit 300 is in the energized state, the electrolysis accelerator supply control unit 560 waits until the de-energized time and issues an instruction to supply the electrolysis accelerator to the electrolysis accelerator supply unit 300 in the de-energized state. The electrolysis accelerator supply unit 300 then supplies the electrolysis accelerator 310. That is, the electrolysis accelerator supply unit 300 supplies the electrolysis accelerator 310 in the de-energized state. The reason why it is better to supply the electrolysis accelerator 310 in the de-energized state is the same as in Embodiment 7. That is, by performing this control, the life of the electrode unit 140 can be extended, and the hypochlorous acid concentration in the electrolytic cell 100 after the completion of energization can be stably maintained at the target hypochlorous acid concentration.

[0197] Although the present invention has been described above based on the embodiments, it goes without saying that the present invention is not limited to the above embodiments and that various modifications are possible without departing from the spirit of the present invention. Furthermore, the numerical values ​​given in the above embodiments are merely examples, and it goes without saying that the present invention is not limited to adopting the numerical values ​​used in the description of the embodiments.

[0198] For example, in embodiment 1, the electrolyzed water supply unit 120 is 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 transporting hypochlorous acid water from the electrolytic tank 100 to the septic tank 200.

[0199] (Summary of the Invention) The spatial purification device according to the present invention 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 the increased concentration of hypochlorous acid water per unit time based on a first sodium chloride concentration (i.e., the sodium chloride concentration in the electrolytic cell after the electrolysis accelerator is added 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 in the electrolytic cell, the first hypochlorous acid water concentration (i.e., the hypochlorous acid water concentration in the electrolytic cell before the application of current to the electrode unit), and the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit, and an electrode control unit that applies current to the electrode unit for the required current flow time calculated by the second calculation unit. This allows the electrolytic cell to generate hypochlorous acid water at the target hypochlorous acid concentration.

[0200] Furthermore, a third calculation unit may be provided that calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell after current is passed through the electrode unit, based on the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time, and the required current passing time. This makes it possible to determine the second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell after current is passed through the electrode unit.

[0201] The apparatus may also include a purification tank that stores hypochlorous acid water generated 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. This allows the space to be purified.

[0202] The apparatus may further include an electrolyzed water supply control unit that supplies electrolyzed water to the septic tank using the electrolyzed water supply unit, a fourth calculation unit that calculates the amount of electrolyzed water supplied 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 the electrolyzed water is supplied by the electrolyzed water supply unit, based on the second sodium chloride concentration calculated by the third calculation unit, the amount of electrolyzed water supplied by the fourth calculation unit, and the capacity of the electrolytic cell. This makes it possible to determine the third sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell after the electrolyzed water is supplied by the electrolyzed water supply unit.

[0203] The apparatus may also include a sixth calculation unit that calculates the secondary chlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell after the electrolyzed water supply unit has supplied the electrolyzed water, based on the target hypochlorous acid water concentration, the amount of electrolyzed water supplied, and the capacity of the electrolytic cell. This makes it possible to determine the secondary chlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell after the hypochlorous acid water has been supplied.

[0204] 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 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 increase in the concentration of hypochlorous acid water per unit time based on the new first sodium chloride concentration changed by the first change unit and a preset 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 increase in the 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. This allows the electrolytic cell to again produce hypochlorous acid water at the target hypochlorous acid water concentration.

[0205] In addition, the following steps may be repeated: changing the first sodium chloride concentration and the first chlorous 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 the electrode control unit to conduct current for the new required current flow time. This allows the hypochlorous acid water concentration in the electrolytic cell to be continuously adjusted to the target hypochlorous acid water concentration.

[0206] The space may also be purified by a purification unit that purifies the space using hypochlorous acid water from the electrolytic cell.

[0207] A seventh calculation unit that calculates the amount of hypochlorous acid reduced from the electrolytic cell due to purification by the purification unit; The apparatus may further include an eighth calculation unit that calculates the tertiary chlorous 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 reduction calculated by the seventh calculation unit. This makes it possible to determine the tertiary chlorous acid concentration, which is the hypochlorous acid concentration in the electrolytic cell after the hypochlorous acid has been reduced by purification.

[0208] 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 preset 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. This allows the electrolytic cell to again generate hypochlorous acid water at the target hypochlorous acid water concentration.

[0209] In addition, the following steps may be repeated: changing the first sodium chloride concentration and the first chlorous 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 the electrode control unit to conduct current for the new required current flow time. This allows the hypochlorous acid water concentration in the electrolytic cell to be continuously adjusted to the target hypochlorous acid water concentration.

[0210] Furthermore, an electrolysis promoter supply unit that supplies an electrolysis promoter to the electrolysis cell may be provided, and the electrolysis promoter supply unit may supply the electrolysis promoter if the required current application time calculated by the second calculation unit is longer than the longest current application time. This allows the concentration of hypochlorous acid water in the electrolysis cell to be stably maintained at the target hypochlorous acid water concentration.

[0211] The electrolysis system may further include an electrolysis promoter supply unit that supplies an electrolysis promoter to the electrolytic tank, and the electrolysis water supply control unit supplies electrolyzed water to the septic tank every first hour using the electrolysis water supply unit, and the electrolysis promoter supply unit may supply the electrolysis promoter if the required current application time calculated by the second calculation unit is longer than the first hour. This allows for a stable supply of electrolyzed water having a target hypochlorous acid concentration to the septic tank.

[0212] Furthermore, a sodium chloride concentration adding unit may be provided that, after the electrolysis accelerator is added by the electrolysis accelerator adding unit, adds the theoretical increase in sodium chloride concentration due to the addition of the electrolysis accelerator to the sodium chloride concentration in the electrolytic cell. This makes it possible to grasp the sodium chloride concentration in the electrolytic cell after the electrolysis accelerator is added by the electrolysis accelerator adding unit.

[0213] Furthermore, the apparatus may include a sodium chloride concentration adding unit that performs a process a predetermined number of times, after the introduction of the electrolysis accelerator by the electrolysis accelerator introducing unit, of adding a divided increase value, obtained by dividing a predetermined number of times from a theoretical increase in the sodium chloride concentration due to the introduction of the electrolysis accelerator, to the sodium chloride concentration in the electrolytic cell per unit time, where the unit time is the time obtained by dividing the time required for the sodium chloride concentration in the electrolytic cell to increase by the theoretical increase value by the predetermined number of times. This makes it possible to accurately grasp the sodium chloride concentration in the electrolytic cell after the introduction of the electrolysis accelerator by the electrolysis accelerator introducing unit.

[0214] Furthermore, the electrode control unit controls the energization of the electrode unit by alternately energizing and de-energizing it, and the electrolysis promoter feeding unit may wait until the de-energized state if the timing for feeding the electrolysis promoter is in the energized state, and feed the electrolysis promoter in the de-energized state. This extends the life of the electrode unit 140, and makes it possible to stably maintain the hypochlorous acid concentration in the electrolytic cell at the target hypochlorous acid concentration after the completion of energization.

[0215] Furthermore, the electrode control unit may alternately energize and de-energize the electrode unit, reverse the energization direction from the first energization direction after a second hour has elapsed in total energization time in the first energization direction, and provide a first de-energization time after the reversal of the energization direction, and the electrolysis enhancer feed unit may feed the electrolysis enhancer in a de-energized state. This extends the life of the electrode unit 140 and enables the hypochlorous acid concentration in the electrolytic cell after energization to be stably maintained at the target hypochlorous acid concentration. [Industrial Applicability]

[0216] The space purification device according to the present invention is useful as a space purification device that removes (including inactivates) bacteria, fungi, viruses, odors, and the like in the air. [Explanation of symbols]

[0217] 100 electrolytic cell 110 Water supply section 112 Lid 120 Electrolyzed water supply section 122 Water supply pump 124 Water supply pipe 126 Supply Inlet 130 Electrolyzer Full Water Float 140 Electrode section 200 Septic Tank 210 Septic tank full float 300 Electrolysis accelerator injection section 310 Electrolysis accelerator 400 Purification Department 401 Purification Department 500 control section 510 First Calculation Department 512 Second calculation part 514 Third Calculation Department 516 Fourth Calculation Department 518 Fifth Calculation Department 520 Sixth Calculation Department 522 First Change Section 524 Seventh Calculation Department 526 Eighth Calculation Department 528 Second Change Section 532 Sodium chloride concentration addition part, 540 Electrode control unit 550 electrolytic water supply control unit, 560 Electrolysis accelerator injection control unit 570 Storage section 600 control section 1000 Space Purification Device 2000 Space Purification Device

Claims

1. an electrolytic cell for mixing an electrolysis promoter 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 the water mixed in the electrolytic cell; A first calculation unit that calculates an increase in concentration of hypochlorous acid water per unit time based on a first sodium chloride concentration, which is the sodium chloride concentration in the electrolytic bath after a change due to the addition of the electrolysis accelerator to the electrolytic bath, and a predetermined hypochlorous acid generation efficiency per unit time; A second calculation unit calculates the required energization time to achieve the target hypochlorous acid water concentration based on the target hypochlorous acid water concentration of the electrolytic cell, the primary hypochlorous acid water concentration which is the hypochlorous acid water concentration of the electrolytic cell before energization by the electrode unit, and the increased concentration of hypochlorous acid water per unit time calculated by the first calculation unit; an electrode control unit that applies current to the electrode unit for the required current application time calculated by the second calculation unit; A space purification device comprising:

2. The space purification device according to claim 1, further comprising a third calculation unit that calculates a second sodium chloride concentration, which is the sodium chloride concentration in the electrolytic cell after energization by the electrode unit, based on the first sodium chloride concentration, the increased concentration of hypochlorous acid water per unit time, and the required energization time.

3. A septic tank for storing the hypochlorous acid water generated in the electrolytic cell; an electrolyzed water supply unit that supplies the hypochlorous acid water from the electrolytic tank to the septic tank; The space purification device according to claim 2, further comprising: a purification unit that purifies the space using the hypochlorous acid water stored in the purification tank.

4. an electrolyzed water supply control unit that supplies electrolyzed water to the septic tank using the electrolyzed water supply unit; A fourth calculation unit that calculates the amount of electrolyzed water fed by the electrolyzed water supply unit; a fifth calculation unit that calculates a third sodium chloride concentration, which is the sodium chloride concentration of the electrolytic cell after the electrolytic water is fed by the electrolytic water supply unit, based on the second sodium chloride concentration calculated by the third calculation unit, the electrolytic water feed rate calculated by the fourth calculation unit, and the capacity of the electrolytic cell; The space purification device according to claim 3, comprising:

5. The sixth calculation unit calculates the hypochlorous acid water concentration of the electrolytic cell after the electrolyzed water supply unit supplies electrolyzed water based on the target hypochlorous acid water concentration, the electrolyzed water supply amount, and the capacity of the electrolytic cell. The space purification device according to claim 4, further comprising a sixth calculation unit.

6. 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, The first calculation unit A new increased concentration of hypochlorous acid water per unit time is calculated based on the new first sodium chloride concentration changed by the first change unit and the predetermined hypochlorous acid generation efficiency per unit time, The second calculation unit Calculate the new required current application time by 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, The electrode control unit The space purification device according to claim 5 , wherein the electrode unit is energized for the new required energization time calculated by the second calculation unit.

7. The space purification device according to claim 6, wherein the first change unit changes the first sodium chloride concentration and the first hypochlorous acid water concentration, the first calculation unit calculates the new hypochlorous acid water increased concentration per unit time, the second calculation unit calculates the new required current flow time, and the electrode control unit repeats the control of conducting current for the new required current flow time.

8. The space purification device according to claim 2, further comprising a purification unit that purifies the space using the hypochlorous acid water in the electrolytic cell.

9. a seventh calculation unit that calculates the amount of hypochlorous acid reduced from the electrolytic cell due to purification by the purification unit; The target hypochlorous acid water concentration and the hypochlorous acid reduction amount calculated by the seventh calculation unit are used to calculate the tertiary hypochlorous acid water concentration, which is the hypochlorous acid water concentration in the electrolytic cell after the hypochlorous acid reduction by the purification. An eighth calculation unit is provided. The space purification device according to claim 8, further comprising:

10. A second change unit that changes the first sodium chloride concentration to the second sodium chloride concentration calculated by the third calculation unit and the first chlorous acid water concentration to the tertiary chlorous acid water concentration calculated by the eighth calculation unit, The first calculation unit A new increased concentration of hypochlorous acid water per unit time is calculated based on the new first sodium chloride concentration changed by the second change unit and the predetermined hypochlorous acid generation efficiency per unit time, The second calculation unit Calculate the new required current application time by 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, The electrode control unit The space purification device according to claim 9 , wherein the electrode unit is energized for the new required energization time calculated by the second calculation unit.

11. The space purification device according to claim 10, wherein the change of the first sodium chloride concentration and the change of the first hypochlorous acid water concentration by the second change unit, the calculation of the new hypochlorous acid water increased concentration per unit time by the first calculation unit, the calculation of the new required current flow time by the second calculation unit, and the control of current flow for the new required current flow time by the electrode control unit are repeated.

12. an electrolysis accelerator supply unit that supplies the electrolysis accelerator to the electrolysis tank; The electrolysis promoter input section is The space purification device according to claim 1 , wherein the electrolysis promoter is added when the required current application time calculated by the second calculation unit is longer than the longest current application time.

13. an electrolysis accelerator supply unit that supplies the electrolysis accelerator to the electrolysis tank; The electrolyzed water supply control unit is supplying electrolyzed water to the septic tank by the electrolyzed water supply unit every first hour; The electrolysis promoter input section is The space purification device according to claim 3 , wherein the electrolysis promoter is added if the required current application time calculated by the second calculation unit is longer than the first time.

14. After the electrolysis accelerator is introduced by the electrolysis accelerator introduction unit, The space purification device according to claim 12 or 13, further comprising a sodium chloride concentration adding unit that adds a theoretical increase in the sodium chloride concentration due to the addition of the electrolysis accelerator to the sodium chloride concentration in the electrolytic cell.

15. a sodium chloride concentration adding unit that performs a process for a predetermined number of times, after the electrolysis accelerator is added by the electrolysis accelerator adding unit, for each unit time, a divided increase value obtained by dividing a theoretical increase value of the sodium chloride concentration due to the addition of the electrolysis accelerator by a predetermined number of times, to the sodium chloride concentration in the electrolytic cell; The unit time is 14. The space purifying device according to claim 12 or 13, wherein the theoretical increase in the sodium chloride concentration in the electrolytic cell is a time obtained by dividing the time required to increase the concentration by the predetermined number of times.

16. The electrode control unit performing current control to alternately energize and de-energize the electrode unit; The electrolysis promoter input section is 16. The space purification device according to claim 12, wherein if the timing for adding the electrolysis promoter is in a power-on state, the device waits until a power-off state, and adds the electrolysis promoter in the power-off state.

17. The electrode control unit energization control is performed in which the electrode unit is alternately energized and de-energized, and the energization direction is reversed from the first energization direction after a total energization time in the first energization direction has elapsed for a second time period, and a first de-energization time is provided after the reversal of the energization direction; The electrolysis promoter input section is 16. The space purification device according to claim 12, wherein the electrolysis promoter is introduced in the non-energized state.

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