CN117836566A - Space purification system - Google Patents

Abstract

The spatial purification system (100) of the present disclosure is provided with: a hypochlorous acid water supply unit (36) for supplying hypochlorous acid water to the mixing tank (92); a water supply unit (50) for supplying water to the mixing tank (92); a water level sensor (90) for detecting the water level of the mixing tank (92); an air purification unit (11) that refines the mixed water of hypochlorous acid water and water stored in the mixing tank (92) and releases the refined mixed water into the air; and an air purification control unit (41) for controlling the supply process and the drainage process of the mixed water. The air purification control unit (41) performs, as a water discharge process, a first control for supplying hypochlorous acid water by the hypochlorous acid water supply unit (36) at predetermined intervals, a second control for supplying water by the water supply unit (50) based on information on the water level of the mixing tank (92) from the water level sensor (90), and a third control for discharging mixed water stored in the mixing tank (92) based on the accumulated humidification amount in the air purification unit (11).

Description

Space purification system

Technical Field

The present disclosure relates to a space purification device that refines water, discharges the air sucked by the device by containing the water, and releases the water by containing a purification component.

Background

Conventionally, as such a space purifying apparatus, an air conditioning system has been known in which air supplied into a room is brought into contact with a gas-liquid contact member portion containing a purifying component and released to sterilize the space (for example, refer to patent document 1).

In such a conventional space purification apparatus, in general, in addition to the release of the water to be miniaturized, water stored in the apparatus (water containing a purification component) is gasified and released into a space in association with the miniaturization operation.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2009-133521

Disclosure of Invention

However, in the conventional space purification system, in a case where the amount of humidification required for the indoor space is small, for example, in summer (particularly, in a rainy day) in japan, when relatively high humidity air (for example, 95% at 12 ℃) after dehumidification by an air conditioner or the like is ventilated, water (hypochlorous acid water) containing the purified component which is miniaturized is difficult to gasify, and therefore, the purified component (hypochlorous acid) is not gasified, and it is difficult to release the purified component into the indoor space. On the other hand, in a case where a large amount of humidification is required, for example, in winter in japan, when warm air having a relatively low humidity (for example, 20 ℃ and 30%) is ventilated, water containing the purified component which has been miniaturized is easily gasified, and therefore the purified component is released in a large amount to the indoor space. That is, in the conventional space purifying apparatus, there is a problem that it is not easy to adjust the amount of the purifying component released into the indoor space (in the air).

An object of the present disclosure is to provide a technique capable of easily adjusting the amount of a purification component released into the air.

The spatial purification system according to the present disclosure includes: a hypochlorous acid water generation unit for generating hypochlorous acid water; a hypochlorous acid water supply unit for supplying hypochlorous acid water from the hypochlorous acid water supply unit to the mixing tank; a water supply unit for supplying water to the mixing tank; a water level sensor for detecting the water level of the mixing tank; a humidification/purification unit for micronizing the mixed water of hypochlorous acid water and water stored in the mixing tank and releasing the micronized mixed water into the air; and a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank. The control unit performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit at predetermined intervals, and a second control of supplying water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, and performs, as a drain process, a third control of draining mixed water stored in the mixing tank based on the accumulated humidification amount in the humidification purification unit.

With the spatial purification system according to the present disclosure, the amount of the purification component released into the air can be easily adjusted.

Drawings

Fig. 1 is a diagram showing a configuration of a spatial purification system according to embodiment 1 of the present disclosure.

Fig. 2 is a block diagram showing a configuration of a control unit of the spatial purification system according to embodiment 1 of the present disclosure.

Fig. 3 is a schematic diagram showing the water amount, hypochlorous acid water concentration, and time-dependent changes in hypochlorous acid concentration (winter: first example) in the space purification system according to embodiment 1 of the present disclosure.

Fig. 4 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration (summer: second example) in the space purification system according to embodiment 1 of the present disclosure.

Fig. 5 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration (summer: third example) in the space purification system according to embodiment 1 of the present disclosure.

Fig. 6 is a diagram showing a configuration of a spatial purification system according to embodiment 2 of the present disclosure.

Fig. 7 is a block diagram showing a configuration of a control unit of the spatial purification system according to embodiment 2 of the present disclosure.

Fig. 8 is a schematic diagram showing the water amount, hypochlorous acid water concentration, and time-dependent changes in hypochlorous acid concentration (winter: first example) in the space purification system according to embodiment 2 of the present disclosure.

Fig. 9 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time (summer: second example) of the hypochlorous acid concentration in the space purification system according to embodiment 2 of the present disclosure.

Fig. 10 is a diagram showing a configuration of a spatial purification system according to embodiment 3 of the present disclosure.

Fig. 11 is a block diagram showing a configuration of a control unit of the spatial purification system according to embodiment 3 of the present disclosure.

Fig. 12 is a schematic view showing the water amount, hypochlorous acid water concentration, and time-dependent change in hypochlorous acid concentration (winter: first example) in the space purification system according to embodiment 3 of the present disclosure.

Fig. 13 is a schematic view showing the amount of water, the hypochlorous acid water concentration, and the change with time (summer: second example) of the hypochlorous acid concentration in the space purification system according to embodiment 3 of the present disclosure.

Fig. 14 is a schematic view showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration (summer: third example) in the space purification system according to embodiment 3 of the present disclosure.

Detailed Description

The spatial purification system according to the present disclosure includes: a hypochlorous acid water generation unit for generating hypochlorous acid water; a hypochlorous acid water supply unit for supplying hypochlorous acid water from the hypochlorous acid water supply unit to the mixing tank; a water supply unit for supplying water to the mixing tank; a water level sensor for detecting the water level of the mixing tank; a humidification/purification unit for micronizing the mixed water of hypochlorous acid water and water stored in the mixing tank and releasing the micronized mixed water into the air; and a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank. The control unit performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit at predetermined intervals, and a second control of supplying water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, and performs, as a drain process, a third control of draining mixed water stored in the mixing tank based on the accumulated humidification amount in the humidification purification unit.

In this way, when the air having a relatively high humidity is ventilated as in summer in japan, the consumption amount of the mixed water stored in the mixing tank is small, and therefore, the supply frequency (the number of times of performing the first control) of the hypochlorous acid water to the mixing tank is increased, and in a state where the hypochlorous acid concentration of the mixed water in the mixing tank is high, the mixed water is miniaturized and released into the air. Further, since the consumption amount of the mixed water stored in the mixing tank is small, the frequency of the discharge of the mixed water (the number of times of performing the third control) is reduced, and the hypochlorous acid concentration of the mixed water in the mixing tank can be maintained high. As a result, even in a situation where the hypochlorous acid water having been micronized is difficult to gasify, hypochlorous acid having been raised to a predetermined concentration can be contained in air and released into the indoor space. On the other hand, when air having a relatively low humidity is ventilated as in winter in japan, the amount of consumption of the mixed water stored in the mixing tank is large, and therefore, the frequency of supply of water to the mixing tank (the number of times of performing the second control) increases, and the mixed water is pulverized and released into the air in a state where the hypochlorous acid concentration of the mixed water in the mixing tank is low. Further, since the consumption amount of the mixed water stored in the mixing tank is large, the frequency of the discharge of the mixed water in the mixing tank (the number of times of performing the third control) becomes large, and the hypochlorous acid concentration of the mixed water can be suppressed from becoming excessively high. As a result, even in a case where the hypochlorous acid water having been pulverized is easily gasified, hypochlorous acid having a concentration as low as a predetermined concentration can be contained in the air and released into the indoor space. That is, in the space purifying system, the amount of hypochlorous acid released into the air can be easily adjusted.

In the spatial purification system according to the present disclosure, the control unit preferably executes the third control when the accumulated humidification amount is equal to or greater than the reference amount. Thereby, the space purification system can easily adjust the concentration of hypochlorous acid water stored in the mixing tank based on the humidification amount in the humidification purification section.

Further, in the spatial purification system according to the present disclosure, it is preferable that the cumulative humidification amount is calculated based on the number of times of execution of the first control and the second control. Thus, the space purification system can simply calculate the cumulative humidification amount, and can improve the control efficiency of the third control.

In the spatial purification system according to the present disclosure, the control unit preferably executes the third control when the number of times the first control is performed is a reference number of times. In this way, in the space purification system, even when the operation is performed for a long period of time (for example, 24 hours), the third control of draining the mixed water stored in the mixing tank is performed before the hypochlorous acid water concentration in the mixing tank is too high, and the state in the mixing tank can be returned to the operation-initial state. That is, the space purification system can easily adjust the amount of hypochlorous acid released into the air.

Further, in the spatial purification system according to the present disclosure, it is preferable that the control section executes the third control immediately before executing the first control or the second control. In this way, in the space purification system, since the third control is not performed immediately after hypochlorous acid is supplied to the mixing tank by the first control or immediately after water is supplied by the second control, the hypochlorous acid water supplied by the first control or the water supplied by the second control can be used continuously for a long period of time, and waste due to the third control can be reduced.

In the spatial purification system according to the present disclosure, the control unit preferably controls the first control so that the number of times the first control is performed is smaller than the number of times the second control is performed when the humidification demand required for the humidification purification unit is equal to or greater than the first reference value during the supply process, and controls the first control so that the number of times the first control is performed is greater than the number of times the second control is performed when the humidification demand is smaller than the first reference value. In this way, in the space purification system, in the supply process, when the humidification demand is smaller than the first reference value, the mixed water can be miniaturized and released into the air in a state where the hypochlorous acid concentration in the mixing tank is high. On the other hand, when the humidification request amount is equal to or greater than the first reference value, the mixed water can be pulverized and released into the air in a state where the hypochlorous acid concentration in the mixing tank is low. That is, in the space purifying apparatus, hypochlorous acid can be added to the air released from the humidification purifying portion under conditions suitable for the environment of the indoor space based on the humidification request amount.

The following describes modes for carrying out the present disclosure with reference to the drawings. The following embodiments are examples for embodying the present disclosure, and do not limit the technical scope of the present disclosure. In all the drawings, the same parts are denoted by the same reference numerals, and description thereof is omitted. Further, for the details of each part not directly related to the present disclosure, the description of each drawing is omitted in order to avoid repetition.

(embodiment 1)

Fig. 1 is a diagram showing a configuration of a spatial purification system 100 according to embodiment 1 of the present disclosure. The space purification system 100 is a device that performs a cooling process (dehumidifying process) or a heating process on the air 8 (RA) from the indoor space 18 as needed when circulating the air in the indoor space 18, and includes water to be miniaturized and a component (hereinafter, simply referred to as an "air purification component") that purifies the air 8 flowing inside. The space purification system 100 performs sterilization and deodorization of the indoor space 18 by supplying the air 9 (SA) flowing inside to the indoor space 18. Hypochlorous acid is used as the air-purifying component, and the water containing the air-purifying component is hypochlorous acid water.

As shown in fig. 1, the space purification system 100 is mainly configured to include a space purification device 10, an air conditioning device 15, and a hypochlorous acid water generation unit 30.

The space purification apparatus 10 includes the discharge port 3, the air purification unit 11, and the air purification control unit 41. The air conditioning device 15 includes the suction port 2, the blower 13, the refrigerant coil 14, and the air conditioning control unit 42. The space purifying apparatus 10 and the air conditioning apparatus 15 have respective cases constituting the outer frames of the apparatus, and the space purifying apparatus 10 and the air conditioning apparatus 15 are connected by a duct 24. The air conditioning device 15 has a side surface on which the suction port 2 is formed, and a side surface on which the space purification device 10 has a side surface on which the discharge port 3 is formed.

The intake port 2 is an intake port for taking in air 8 from the indoor space 18 to the air conditioning apparatus 15. The suction port 2 communicates with an indoor suction port 16a provided in a ceiling or the like of the indoor space 18 via a duct 16. Thus, the air inlet 2 can suck air in the indoor space 18 from the indoor air inlet 16a into the air conditioning apparatus 15.

The discharge port 3 is a discharge port for discharging the air 9 (SA) flowing through the space purification device 10 into the indoor space 18. The discharge port 3 communicates with an indoor discharge port 17a provided in a ceiling or the like of the indoor space 18 via a duct 17. Thereby, the air 9 flowing through the space purification device 10 can be discharged from the indoor discharge port 17a to the indoor space 18 through the discharge port 3.

In addition, inside the air conditioning device 15 and the space purification device 10, air passages (a front-stage air passage 4, a middle-stage air passage 5, and a rear-stage air passage 6) are formed that communicate the suction port 2 with the discharge port 3 via a duct 24. The front-stage air passage 4 is an air passage adjacent to the suction port 2. The front-stage air duct 4 is provided with an air blower 13 and a refrigerant coil 14.

The middle air duct 5 is an air duct through which air 8 flowing through the front air duct 4 flows at a position adjacent to the front air duct 4 (duct 24). The middle duct 5 is provided with an air purifying unit 11 in the duct.

The rear-stage air duct 6 is an air duct adjacent to the discharge port 3, and in the rear-stage air duct 6, air 8 flowing through the middle-stage air duct 5 flows through the air purifying unit 11 to become air 9 containing micronized water and hypochlorous acid.

In the air conditioner 15 and the space purification device 10, the air 8 sucked from the suction port 2 flows through the front-stage air passage 4, flows through the middle-stage air passage 5 and the rear-stage air passage 6, and is discharged as air 9 from the discharge port 3.

The blower 13 of the air-conditioning device 15 is a device for conveying air 8 (RA) in the indoor space 18 from the suction port 2 into the air-conditioning device 15. The blower 13 is provided upstream of the refrigerant coil 14 in the front stage air passage 4. The blower 13 controls the on/off of the operation based on the blower output information from the air conditioning control unit 42. The air 8 in the indoor space 18 is taken into the air conditioner 15 by the operation of the blower 13 and is sent to the refrigerant coil 14.

The refrigerant coil 14 is disposed downstream of the blower 13 in the front-stage air passage 4, and is a member for cooling or heating the introduced air 8. The refrigerant coil 14 changes the output state (cooling, heating, or turning off) according to the output signal from the air conditioning control unit 42, and adjusts the cooling capacity (cooling amount) or heating capacity (heating amount) for the introduced air 8. In the refrigerant coil 14, when the introduced air 8 is cooled, dehumidification of the introduced air 8 is achieved, and therefore the cooling capacity (cooling amount) for the air 8 may also be referred to as dehumidification capacity (dehumidification amount) for the air 8.

The refrigerant coil 14 functions as a heat absorber or a radiator in a refrigeration cycle including a compressor, a radiator, an expander, and a heat absorber, and absorbs heat (cools) or dissipates heat (heats) when the refrigerant introduced from the outdoor unit 20 flows therein. More specifically, the refrigerant coil 14 is connected to the outdoor unit 20 via a refrigerant circuit 21 through which the refrigerant flows. The outdoor unit 20 is an outdoor unit provided in the outdoor space 19, and includes a compressor 20a, an expander 20b, an outdoor heat exchanger 20c, a blower fan 20d, and a four-way valve 20e. Since components of a general structure are used for the outdoor unit 20, detailed descriptions of the respective devices (the compressor 20a, the expander 20b, the outdoor heat exchanger 20c, the blower fan 20d, and the four-way valve 20 e) are omitted.

Since the four-way valve 20e is connected to the refrigeration cycle including the refrigerant coil 14, the air-conditioning apparatus 15 can switch between a state of a cooling mode (dehumidifying mode) in which the air (air 8) is cooled and dehumidified by the four-way valve 20e through which the refrigerant flows in the first direction and a state of a heating mode in which the air (air 8) is heated by the four-way valve 20e through which the refrigerant flows in the second direction.

Here, the first direction is a direction in which the refrigerant flows through the compressor 20a, the outdoor heat exchanger 20c, the expander 20b, and the refrigerant coil 14 in this order. The second direction is a direction in which the refrigerant flows through the compressor 20a, the refrigerant coil 14, the expander 20b, and the outdoor heat exchanger 20c in this order. The refrigerant coil 14 can cool or heat the introduced air (air 8).

The air purifying unit 11 of the space purifying apparatus 10 is a unit for humidifying the air 8 taken into the space, and includes water and hypochlorous acid which are micronized during humidification. In more detail, the air purifying unit 11 includes a mixing tank 92, a water level sensor 90, a humidifying motor 11a, and a humidifying nozzle 11b. The air purifying unit 11 has a centrifugal pulverizing type structure as follows: the humidifying nozzle 11b is rotated by the humidifying motor 11a, and hypochlorous acid water stored in the mixing tank 92 of the air purifying unit 11 is sucked up by centrifugal force and scattered around (in the centrifugal direction), collided and pulverized, so that the passing air contains moisture. The air purification unit 11 changes the number of rotations (hereinafter, rotational output value) of the humidification motor 11a based on an output signal from the air purification control unit 41, and adjusts the humidification ability (humidification amount). The amount of humidification is also referred to as an additional amount of hypochlorous acid added to the air. The air purifying unit 11 corresponds to a "humidification purifying unit" in the claims.

The water level sensor 90 measures the water level of the hypochlorous acid water stored in the mixing tank 92, and outputs the measured value to the air cleaning control unit 41. More specifically, the water level sensor 90 measures the water level of the hypochlorous acid water stored in the mixing tank 92, the water level of the mixing tank 92 in the water shortage state, the water level of the mixing tank 92 in the full state, and the water level of the reference water amount in the mixing tank 92, and outputs the measured values as water level information to the air purification control unit 41. The reference water amount is about 5/6 of the capacity of the mixing tank 92. The mixing tank 92 is a tank for storing hypochlorous acid water in the air cleaning unit 11, and is also called a water storage unit. In the mixing tank 92, hypochlorous acid water of a predetermined concentration supplied from the hypochlorous acid water supply unit 36 described later and water supplied from the water supply unit 50 described later are mixed in the tank, and stored as mixed water containing diluted hypochlorous acid water. The hypochlorous acid water (mixed water) stored in the mixing tank 92 can be discharged from the mixing tank 92 to the outside through the water discharge unit 60 that operates according to the output signal from the air purification control unit 41.

The hypochlorous acid water generating section 30 includes an electrolytic bath 31, an electrode 32, an electromagnetic valve 33, a brine tank 34, a brine transfer pump 35, a water level sensor 39, and a hypochlorous acid water supplying section 36.

Brine tank 34 stores brine, and supplies brine to electrolytic bath 31 via brine pump 35 according to an output signal from air purification control unit 41. The electrolytic tank 31 stores brine, which is an electrolysis target supplied from the brine tank 34. Also, according to an output signal from the air purification control unit 41, tap water is supplied from a water supply pipe such as a tap water pipe to the electrolytic cell 31 via the solenoid valve 33, and the supplied tap water is mixed with brine, so that brine of a predetermined concentration is stored. The electrode 32 is disposed in the electrolytic cell 31, and is energized to electrolyze brine for a predetermined time based on an output signal from the air purification control unit 41, thereby generating hypochlorous acid water of a predetermined concentration. That is, the electrolytic cell 31 generates hypochlorous acid water by electrolyzing an aqueous chloride solution (for example, an aqueous sodium chloride solution) as an electrolyte between a pair of electrodes. Since a general apparatus can be used for the electrolytic bath 31, a detailed description thereof will be omitted. The electrolyte is an electrolyte capable of generating hypochlorous acid water, and is not particularly limited as long as it contains chloride ions even in a small amount, and examples thereof include aqueous solutions in which sodium chloride, calcium chloride, magnesium chloride, or the like is dissolved as a solute. Hydrochloric acid may be used. In this embodiment, as the electrolyte, a sodium chloride aqueous solution (brine) in which sodium chloride is added to water is used.

The water level sensor 39 measures the water level in the electrolytic bath 31, and outputs the measured value to the air cleaning control unit 41.

The hypochlorous acid water supply unit 36 supplies hypochlorous acid water from the electrolytic bath 31 to the mixing tank 92 of the air cleaning unit 11 based on an output signal from the air cleaning control unit 41. The hypochlorous acid water supply unit 36 includes a hypochlorous acid water delivery pump 37 and a water delivery pipe 38. The hypochlorous acid water feed pump 37 feeds hypochlorous acid water of the electrolytic bath 31 to the water feed pipe 38 based on an output signal from the air purification control unit 41. The water supply pipe 38 is connected between the hypochlorous acid water supply pump 37 and the mixing tank 92, and supplies hypochlorous acid water to the mixing tank 92.

The water supply unit 50 supplies water to the mixing tank 92 based on an output signal from the air purification control unit 41. The water supply unit 50 includes a solenoid valve 51 and a water pipe 52. The solenoid valve 51 controls whether or not to allow water supplied from a tap water pipe outside the space purification apparatus 10 to flow to the water pipe 52, based on an output signal from the air purification control unit 41. The water supply pipe 52 is connected between the solenoid valve 51 and the mixing tank 92, and supplies water to the mixing tank 92.

The drain unit 60 is connected to the bottom of the mixing tank 92, and discharges the mixed water stored in the mixing tank 92 to the outside based on an output signal from the air purification control unit 41. The drain portion 60 has a solenoid valve 61 and a water feed pipe 62. The solenoid valve 61 controls whether or not to allow the mixed water stored in the mixing tank 92 to flow to an external drain pipe based on an output signal from the air purification control unit 41. The water supply pipe 62 is connected between the mixing tank 92 and the solenoid valve 61, and supplies the mixed water to an external drain pipe.

In the air purifying section 11, hypochlorous acid water from the hypochlorous acid water supply section 36 and water from the water supply section 50 are supplied to the mixing tank 92, respectively. The hypochlorous acid water is mixed with water in the mixing tank 92 of the air cleaning unit 11. The mixed water of hypochlorous acid water and water may also be referred to as hypochlorous acid water. More specifically, hypochlorous acid water from the hypochlorous acid water supply unit 36 or water from the water supply unit 50 is supplied and mixed to hypochlorous acid water remaining in the mixing tank 92 of the air cleaning unit 11. The air cleaning unit 11 centrifugally pulverizes the mixed water of hypochlorous acid water and water stored in the mixing tank 92 to release hypochlorous acid water into the indoor space 18. The micronized hypochlorous acid water is released into the indoor space 18 in a state where the liquid component is evaporated.

An operating device 43 is provided on a wall surface of the indoor space 18. The operation device 43 is provided with a user interface operable by a user, and receives a temperature setting value and a humidity setting value from the user. The operation device 43 includes a temperature and humidity sensor 44, and the temperature and humidity sensor 44 measures the temperature and humidity of the air in the indoor space 18. Since a known technique may be used for measuring the temperature and humidity in the temperature and humidity sensor 44, a description thereof will be omitted here.

The operation device 43 is connected to the air cleaning control unit 41 and the air conditioning control unit 42 by wires or wirelessly, and transmits the temperature set value, the humidity set value, the temperature measured value, and the humidity measured value to the air cleaning control unit 41 and the air conditioning control unit 42. The information may be transmitted collectively, or may be transmitted individually, with arbitrary 2 or more pieces. The operation device 43 may send information to the air purification control unit 41, and the air purification control unit 41 may transfer the information to the air conditioning control unit 42.

The air conditioning control unit 42 of the air conditioning apparatus 15 receives the temperature set value and the temperature measured value, and controls the refrigerant coil 14 and the outdoor unit 20 so that the temperature measured value approaches the temperature set value. In the heating mode, the air conditioning control unit 42 increases the degree of heating as the difference between the temperature measured value and the temperature set value increases when the temperature measured value is lower than the temperature set value.

Next, the air purification control unit 41 of the space purification apparatus 10 will be described.

As the treatment operations of the hypochlorous acid water generating section 30 and the space purifying apparatus 10, the air purifying control section 41 controls the operations related to the electrolytic treatment in the electrolytic bath 31, the operation related to the supply treatment of hypochlorous acid water to the air purifying section 11, the operation related to the supply treatment of water to the air purifying section 11, the operation related to the humidification purification treatment in the air purifying section 11, and the operation related to the drainage treatment of mixed water in the air purifying section 11, respectively. The air purification control unit 41 includes a computer system including a processor and a memory. The computer system functions as a control unit by executing the program stored in the memory by the processor. The program executed by the processor is recorded in advance in the memory of the computer system, but may be provided by being recorded in a nonvolatile recording medium such as a memory card, or may be provided by being provided through an electric communication line such as the internet. The air purification control unit 41 corresponds to a "control unit" in the claims.

Fig. 2 is a block diagram showing the configuration of the air purification control unit 41 of the space purification system 100 according to embodiment 1. Specifically, as shown in fig. 2, the air purification control unit 41 includes an input unit 41a, a storage unit 41b, a timer unit 41c, a processing unit 41d, and an output unit 41e.

< action related to electrolytic treatment in electrolytic tank >

The air purification control unit 41 performs the following process as an operation related to the electrolytic process in the electrolytic bath 31.

The air purification control unit 41 receives water level information (water shortage signal) from the water level sensor 39 and time-related information (time information) from the timer unit 41c as trigger factors for the electrolytic process of the electrolytic bath 31, and outputs the received information to the processing unit 41 d.

The processing unit 41d determines control information based on the water level information from the water level sensor 39, the time information from the timer unit 41c, and the setting information from the storage unit 41b, and outputs the control information to the output unit 41e. Here, the setting information includes information about the start time or the end time of formation of hypochlorous acid water, information about the supply amount of tap water to be introduced into the electrolytic bath 31, information about the amount of liquid containing chloride ions to be charged into the brine transfer pump 35, information about the electrolysis conditions (time, current value, voltage, etc.) in the electrode 32, information about the opening/closing timing of the electromagnetic valve 33, and information about the opening/closing operation of the hypochlorous acid water transfer pump 37.

Here, the electrolysis conditions in the electrode 32 can be determined based on the amount of tap water in the electrolytic bath 31, the chloride ion concentration, the electrolysis time, and the degree of degradation of the electrode 32, and an algorithm can be created and set and stored in the storage unit 41 b.

The output unit 41e outputs signals (control signals) to the respective devices (the brine pump 35, the solenoid valve 33, and the hypochlorous acid water pump 37) based on the received control information.

More specifically, first, the brine pump 35 is kept stopped based on the signal from the output unit 41e, and the hypochlorous acid water pump 37 is kept stopped based on the signal from the output unit 41 e.

Then, the solenoid valve 33 is opened based on the signal from the output unit 41 e. Thereby, supply of tap water from the tap water pipe to the electrolytic bath 31 is started. Then, the solenoid valve 33 is closed based on a signal from the output unit 41e that receives the water level information (full water) from the water level sensor 39. Thereby, the electrolytic bath 31 is supplied with tap water to a set supply amount.

Next, the brine pump 35 starts to operate based on a signal from the output unit 41e, and the liquid containing a predetermined amount of chloride ions is transported to the electrolytic bath 31 and stopped. Thus, chloride ions are dissolved in tap water, and the electrolytic bath 31 is in a state of generating an aqueous solution (chloride aqueous solution) containing a predetermined amount of chloride ions.

Then, the electrode 32 starts electrolysis of the aqueous chloride solution based on the signal from the output unit 41e, and generates and stops hypochlorous acid water under the set conditions. The hypochlorous acid water generated by the electrode 32 is, for example, in a state where the hypochlorous acid concentration is 100ppm to 150ppm (for example, 120 ppm) and the pH is 7 to 8.5 (for example, 8.0).

As described above, the air cleaning control unit 41 performs electrolytic processing in the electrolytic bath 31 to generate hypochlorous acid water in a predetermined concentration and amount.

< action related to supply treatment of hypochlorous acid Water to air purification section >

The air cleaning control unit 41 performs the following processing as an operation related to the supply processing of hypochlorous acid water to the air cleaning unit 11.

As a trigger of the supply process of hypochlorous acid water to the air cleaning unit 11, the timer unit 41c of the air cleaning control unit 41 measures the operation time of the humidification motor 11a, and the air cleaning control unit 41 outputs a hypochlorous acid water supply request to the hypochlorous acid water generating unit 30 (hypochlorous acid water supply unit 36) every time the operation time passes a predetermined time (for example, 60 minutes). Here, the predetermined time is estimated by experimental evaluation in advance based on the fact that hypochlorous acid in hypochlorous acid water is gasified and reduced with time.

Specifically, the processing unit 41d determines control information based on the time-related information (time information) from the timer unit 41c and the setting information from the storage unit 41b, and outputs the control information to the output unit 41 e. Here, the setting information includes information on the supply interval (for example, 60 minutes) of hypochlorous acid water and information on the on/off operation of the hypochlorous acid water transfer pump 37.

The output unit 41e outputs a signal (control signal) to the hypochlorous acid water transfer pump 37 of the hypochlorous acid water supply unit 36 based on the received control information.

The hypochlorous acid water feed pump 37 operates based on a signal from the output unit 41 e. At this time, when the water amount in the mixing tank 92 is equal to or greater than the reference water amount, the hypochlorous acid water transfer pump 37 is standby until the water amount in the mixing tank 92 is smaller than the reference water amount, and the hypochlorous acid water stored in the mixing tank 92 is consumed so that the timing of the water amount in the mixing tank 92 being smaller than the reference water amount starts to operate. In the present embodiment, the reference water amount is set to about 5/6 of the capacity of the mixing tank 92. Thus, in the hypochlorous acid water generating section 30, the hypochlorous acid water starts to be supplied from the electrolytic bath 31 to the air purifying section 11 (mixing tank 92). When hypochlorous acid water is supplied from the hypochlorous acid water generating unit 30 to the mixing tank 92 in order to ensure the concentration of hypochlorous acid water stored in the electrolytic tank 31, the hypochlorous acid water generated in the electrolytic tank 31 is supplied in full. Therefore, after the hypochlorous acid water is supplied, the electrolytic bath 31 is empty, and the hypochlorous acid water is not produced from the state where the hypochlorous acid water remains in the electrolytic bath 31. When the hypochlorous acid water in the electrolytic bath 31 is supplied in full, the water level sensor 39 outputs a water shortage signal as water level information.

Then, the hypochlorous acid water feed pump 37 is stopped based on a signal from the output unit 41e that receives time-related information (for supplying a predetermined amount of desired time) from the timer unit 41 c. Thus, the hypochlorous acid water generating unit 30 supplies hypochlorous acid water from the electrolytic bath 31 to the air purifying unit 11 (mixing tank 92) in a set supply amount.

As described above, the air cleaning control unit 41 performs the supply process of the hypochlorous acid water from the hypochlorous acid water generating unit 30 (electrolytic cell 31) to the air cleaning unit 11. The control of the hypochlorous acid water supply by the hypochlorous acid water supply unit 36 at predetermined intervals by the air purification control unit 41 is referred to as "first control".

< action related to supply treatment of Water to air purification section >

The air purification control unit 41 performs the following processing as an operation related to the supply processing of water to the air purification unit 11.

The air purification control unit 41 receives water level information (water shortage signal) from the water level sensor 90 of the space purification apparatus 10 as a trigger of the supply process of water to the air purification unit 11, and outputs a water supply request to the water supply unit 50.

Specifically, the input unit 41a receives water level information (water shortage signal) from the water level sensor 90 of the spatial light unit 10, and outputs the received water level information to the processing unit 41 d.

The processing unit 41d determines control information based on the water level information (water shortage signal) from the input unit 41a, the time-related information (time information) from the timer unit 41c, and the setting information from the storage unit 41b, and outputs the control information to the output unit 41 e. Here, the setting information includes information related to the opening/closing operation of the solenoid valve 51 of the water supply unit 50.

Then, the output unit 41e outputs a signal (control signal) to the solenoid valve 51 based on the received control information.

The solenoid valve 51 operates based on a signal from the output unit 41 e. Thus, in the water supply portion 50, supply of water from the external water supply pipe to the air purification portion 11 (mixing tank 92) via the water supply pipe 52 is started.

Then, the solenoid valve 51 is stopped based on a signal from the output unit 41e that receives the water level information (full water signal) from the water level sensor 90 of the spatial light unit 10. Thus, the water supply unit 50 supplies water from the external water supply pipe to the air purification unit 11 (mixing tank 92) until the amount reaches the set amount.

As described above, the air purification control unit 41 performs the supply process of water from the water supply unit 50 to the air purification unit 11. The control of the water supply by the water supply unit 50 by the air purification control unit 41 based on the information (water shortage information) on the water level of the mixing tank 92 from the water level sensor 90 is referred to as "second control".

< action related to humidification purification treatment in air purification section >

Next, an operation related to humidification purification processing in the air purification unit 11 of the air purification control unit 41 will be described.

The input unit 41a receives user input information from the operation device 43, temperature and humidity information of the air in the indoor space 18 from the temperature and humidity sensor 44, and water level information of the hypochlorous acid water (mixed water) in the mixing tank 92 from the water level sensor 90. The input unit 41a outputs the received information to the processing unit 41d.

The operation device 43 is a terminal for inputting user input information (for example, an air volume, a target temperature, a target humidity, the presence or absence of hypochlorous acid addition, a target supply amount level of hypochlorous acid, etc.) related to the space purification device 10, and is communicably connected to the air purification control unit 41 by wireless or wired connection.

The temperature and humidity sensor 44 is a sensor that is provided in the indoor space 18 and senses the temperature and humidity of the air in the indoor space 18.

The storage unit 41b stores user input information received by the input unit 41a and supply setting information in a hypochlorous acid supply operation for air flowing through the apparatus. The storage unit 41b outputs the stored supply setting information to the processing unit 41d. The supply setting information during the hypochlorous acid supply operation may be referred to as humidification setting information during the humidification purification operation of the air purification unit 11.

The timer unit 41c outputs time information about the current time to the processor unit 41d.

The processing unit 41d receives various information (user input information, temperature and humidity information, water level information) from the input unit 41a, time information from the timer unit 41c, and supply setting information from the storage unit 41 b. The processing unit 41d uses the received user input information, time information, and supply setting information to determine control information related to the humidification purification operation.

Specifically, the processing unit 41d determines the required humidification amount of the indoor space 18 at regular intervals based on the humidity difference between the target humidity stored in the storage unit 41b and the temperature and humidity information of the air in the indoor space 18 from the temperature and humidity sensor 44 based on the time information from the timer unit 41 c. The processing unit 41d determines control information related to the humidification purification operation based on the determined humidification demand and the supply setting information stored in the storage unit 41 b. The processing unit 41d outputs the specified control information to the output unit 41e.

When the water level information from the water level sensor 90 includes information (water shortage signal) indicating the water level of the hypochlorous acid water (mixed water) in the mixing tank 92, the output unit 41e outputs a signal indicating a water supply request to the water supply unit 50 to the output unit 41e. Further, the processing unit 41d outputs a signal for the hypochlorous acid water supply request to the hypochlorous acid water generating unit 30 to the output unit 41e when the operation time of the air purifying unit 11 (the humidification motor 11 a) is a predetermined time (for example, 60 minutes) based on the time information from the time counting unit 41 c. In the present embodiment, the water level indicating that hypochlorous acid water (mixed water) in the mixing tank 92 is deficient is set to a water level at which the hypochlorous acid water (mixed water) in the mixing tank 92 is reduced from a full state to about 1/3 of the hypochlorous acid water.

The output unit 41e then outputs the received signals to the air purification unit 11, the hypochlorous acid water generation unit 30 (hypochlorous acid water supply unit 36), and the water supply unit 50, respectively.

Then, the air cleaning unit 11 receives the signal from the output unit 41e, and executes control of the operation based on the received signal. At this time, the hypochlorous acid water generating unit 30 (hypochlorous acid water supplying unit 36) receives the signal (hypochlorous acid water supplying request signal) from the output unit 41e, and based on the received signal, performs the operation (first control) related to the supply process of hypochlorous acid water to the air purifying unit 11. The water supply unit 50 receives a signal (water supply request signal) from the output unit 41e, and executes an operation (second control) related to the supply process of water to the air purification unit 11 based on the received signal.

As described above, the air purification control unit 41 performs, as the supply process, the first control of the supply of hypochlorous acid water by the hypochlorous acid water generating unit 30 (hypochlorous acid water supply unit 36) and the second control of the supply of water by the water supply unit 50 based on the information (water shortage information) on the water level of the mixing tank 92 from the water level sensor 90 at predetermined intervals, and stores the mixed water in the mixing tank 92. When hypochlorous acid water and water are supplied to the mixing tank 92 and mixed water is stored, the air purification control unit 41 executes humidification purification processing for air flowing through the space purification apparatus 10 (air purification unit 11) by making the hypochlorous acid water supply cycle (every predetermined time period) different from the water supply cycle (every water shortage detection).

< action related to drainage treatment of Mixed Water of air purification portion >

As an operation related to the drainage process of the mixed water stored in the mixing tank 92 of the air cleaning unit 11, the air cleaning control unit 41 executes the following process.

As a trigger of the drainage process of the mixed water stored in the mixing tank 92, the air cleaning control unit 41 determines whether or not the drainage process is to be performed based on information on the cumulative value of the humidification amount (cumulative humidification amount) in the air cleaning unit 11 or information on the number of times the first control is performed in the hypochlorous acid water supply unit 36.

Specifically, the storage unit 41b stores the number of times the first control is executed in the hypochlorous acid water supply unit 36 and the number of times the second control is executed in the water supply unit 50. Here, the number of execution times is the number of times of each control executed after the start of the humidification/purification process operation (hereinafter, also referred to as "after the start of the operation") starting from the initial state of the mixing tank 92 (for example, the state in which the mixing tank 92 is full of water by the supply of water and the supply of hypochlorous acid water after the drainage process).

The processing unit 41d determines an accumulated value of the humidification amount (accumulated humidification amount) in the air cleaning unit 11 based on the information on the number of times the first control is performed in the hypochlorous acid water supply unit 36 and the information on the number of times the second control is performed by the water supply unit 50 from the storage unit 41 b.

Here, the cumulative humidification amount is the total amount of water supplied to the mixing tank 92 after the start of operation (the total amount of hypochlorous acid water supplied by the first control and the amount of water supplied by the second control), and corresponds to the amount of mixed water consumed/reduced by the air cleaning unit 11 after the start of operation. In addition, the accumulated humidification amount is also referred to as accumulated humidification amount.

The processing unit 41d determines whether the determined cumulative humidification amount is equal to or greater than the reference amount and whether the number of times the first control is executed is the reference number of times.

Here, the supply amount of hypochlorous acid water based on the first control is set to about 1/6 of the capacity of the mixing tank 92, the supply amount of water based on the second control is set to about 2/3 of the capacity of the mixing tank 92, and the reference amount is set to an amount about 2 times the capacity of the mixing tank 92. Further, the reference number of times is set to 11 times immediately before the reference amount is reached by only the supply of hypochlorous acid water based on the first control.

When the result of the determination is that the determined cumulative humidification amount is equal to or greater than the reference amount or when the number of times of execution of the first control is equal to or greater than the reference number, the processing unit 41d determines control information based on time-related information (time information) from the timer unit 41c and setting information from the storage unit 41b, and outputs the control information to the output unit 41e. Here, the setting information includes information related to the opening/closing operation of the solenoid valve 61 of the drain 60.

The output unit 41e outputs a signal (control signal) to the solenoid valve 61 based on the received control information.

The solenoid valve 61 operates based on a signal from the output unit 41 e. Thus, in the water discharge portion 60, the discharge of the mixed water from the mixing tank 92 to the external water discharge pipe via the water feed pipe 62 is started.

Then, the solenoid valve 61 is stopped after a predetermined time (for example, 1 minute) elapses based on a signal from the output unit 41e that receives the time information from the timer unit 41 c. Thereby, all the mixed water stored in the mixing tank 92 is discharged and is in an empty state.

As described above, the air cleaning control unit 41 performs the water discharge process of the mixed water from the mixing tank 92 to the outside. The control of the mixed water discharge by the water discharge unit 60 by the air purification control unit 41 is set to "third control" based on information on the cumulative humidification amount in the air purification unit 11 or information on the number of times the first control is executed in the hypochlorous acid water supply unit 36.

Here, the third control is preferably performed immediately before the first control is performed by the hypochlorous acid water supply unit 36 or immediately before the second control is performed by the water supply unit 50. Thus, for example, since the water is not drained by the third control immediately after the new hypochlorous acid water is supplied to the mixing tank 92 by the first control or immediately after the new hypochlorous acid water is supplied by the second control, the mixed water stored in the mixing tank 92 can be used continuously for a long period of time to the maximum extent, and waste caused by the water drainage in the third control can be reduced. In the following examples, the first control is performed immediately before the execution of the first control from the viewpoint of reducing the waste of hypochlorous acid water as an active ingredient of the sterilization.

Next, with reference to fig. 3 to 5, in the space purification system 100, the mixed water (mixed water mixed by the first control or the second control) in the mixing tank 92 of the space purification apparatus 10 (air purification unit 11) will be described. Fig. 3 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration in the space purification system 100 (winter: first example). In more detail, fig. 3 (a) shows the change with time of the amount of hypochlorous acid water (mixed water) in the mixing tank 92. Fig. 3 (b) shows a change with time in the concentration of hypochlorous acid water (mixed water) in the mixing tank 92. Fig. 3 (c) shows the change with time of the concentration of the hypochlorous acid contained in the air of the discharge port 3. Fig. 4 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration (summer: second example) in the space purification system 100. In more detail, fig. 4 (a) shows the change with time of the amount of hypochlorous acid water (mixed water) in the mixing tank 92. Fig. 4 (b) shows a change with time in the concentration of hypochlorous acid water (mixed water) in the mixing tank 92. Fig. 4 (c) shows the change with time of the concentration of the hypochlorous acid contained in the air of the discharge port 3. Fig. 5 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration (summer: third example) in the space purification system 100. In more detail, fig. 5 (a) shows the change with time of the amount of hypochlorous acid water (mixed water) in the mixing tank 92. Fig. 5 (b) shows a change with time in the concentration of hypochlorous acid water (mixed water) in the mixing tank 92. Fig. 5 (c) shows the change with time of the concentration of the hypochlorous acid contained in the air of the discharge port 3.

Here, the hypochlorous acid water is supplied to the mixing tank 92 at predetermined intervals (1 hour), and the water is supplied to the mixing tank 92 every time the water level sensor 90 detects that the mixing tank 92 is a water level lacking water. Further, the drainage process is performed based on the accumulated humidification amount immediately before the first control is performed or a determination result according to the number of times of the first control is performed. More specifically, the drainage process is performed when the accumulated humidification amount is equal to or greater than a reference amount (about 2 times the capacity of the mixing tank 92) or when the number of times the first control is performed is a reference number of times (11 times). In addition, the drainage process may be performed not only immediately before the first control is performed but also immediately before the second control is performed.

In addition, as described above, even if hypochlorous acid water (mixed water) in the mixing tank 92 is a water-deficient water level, about 1/3 of hypochlorous acid water (mixed water) remains in the mixing tank 92 with respect to the full water. For simplicity of the description, the air purifying unit 11 is configured to operate at a constant humidification request amount during the humidification purification operation time. In the following, the predetermined amount of hypochlorous acid water supplied to the mixing tank 92 is also referred to as "hypochlorous acid water stock solution".

First, the operation status in winter in japan will be described. In addition, in winter in japan, since the outside air is dried, the amount of humidification required for the air purification unit 11 is large, and the water supply is performed at intervals shorter than the hypochlorous acid water supply. That is, the water level in the mixing tank 92 becomes deficient before the timing of the hypochlorous acid water supply.

Therefore, as a first example, the water discharge process (third control) under the humidification purification conditions in which the supply of water is performed 3 times (second control) and the supply of aqueous hypochlorous acid stock solution is performed 1 time (first control) is performed until the operation time 2 hours after the start of the operation of the air cleaning unit 11 will be described below.

The humidification purification conditions are set based on the fact that, when the humidification demand for the air purification portion 11 is equal to or greater than the first reference value, the air purification portion 11 is controlled so that the number of times the first control is performed is smaller than the number of times the second control is performed. Here, the first reference value is set to distinguish between a state where the humidity of the air is low in winter in japan and a state where the humidity of the air is high in summer in japan and is wet.

In the first example, as shown in fig. 3 (a), when the operation is started for 0 hour, the supply of the hypochlorous acid aqueous stock solution to the mixing tank 92 (first control) is performed at timings of 1 hour, 2 hours, and 3 hours … …. On the other hand, the supply of water to the mixing tank 92 (second control) is performed at the timings of a hour, b hour, and c hour … …. At the time of 0 hour from the start of the operation, hypochlorous acid water and water are supplied to the mixing tank 92, respectively, and the mixing tank 92 is in a state (initial state) in which the hypochlorous acid water (mixed water) of a predetermined concentration is filled with water.

Then, the water discharge judgment of the mixed water stored in the mixing tank 92 is performed immediately before the first control is performed at the timing of 1 hour, 2 hours, and 3 hours … ….

Specifically, at the timing of 1 hour, which is a period from the start of operation to the operation time of 1 hour (a period from 0 hour or more to less than 1 hour), the cumulative humidification amount is determined to be smaller than the reference amount (2 times the capacity of the mixing tank 92) based on the supply amount of 1 second control (about 0.67 times the capacity of the mixing tank 92). The number of execution times of the first control was 0 times, and it was determined that the reference number of times (11 times) was not reached. Then, the first control is executed in response to the determination result, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 92.

Next, at the timing of 2 hours, which is a period from the start of the operation to the operation time of 2 hours (a period from 0 hours or more to less than 2 hours), the cumulative humidification amount is determined to be the reference amount (2 times the capacity of the mixing tank 92) or more based on the supply amounts of the first control 1 time and the second control 3 times (about 2.1 times the capacity of the mixing tank 92). The number of execution times of the first control was 1, and it was determined that the reference number of times (11 times) was not reached. Then, the third control is performed in response to the determination result, and the mixed water in the mixing tank 92 is discharged. Further, after the third control is performed, the supply of the hypochlorous acid aqueous stock solution and the supply of water are re-performed to the mixing tank 92, and the mixing tank 92 is in a state of being full of water due to hypochlorous acid water (mixed water) of a predetermined concentration, as in the initial state.

Then, the same supply operation and drain operation were repeated every 2 hours, taking the timing of 2 hours as the initial state (0 hours).

Described in more detail.

First, referring to fig. 3 (a), description will be made focusing on the change with time of the water level of hypochlorous acid water (mixed water) in the mixing tank 92.

At the beginning of the operation (0 hours), the mixing tank 92 was filled with the mixed water of hypochlorous acid stock solution and water (which is also hypochlorous acid water) until it was full of water. Then, the amount of the mixed water is reduced at a constant rate by the humidification purification operation, and the water shortage is detected at a timing of a hours from the start of the operation, and the water is supplied from the water supply portion 50 until the mixing tank 92 becomes full. Then, the water level of the mixed water is reduced at a constant rate by the humidification purification operation, and the mixed water is discharged at 1 hour, which is the timing of supplying the hypochlorous acid aqueous stock solution. In the humidification purification operation up to this point, since the number of times of water supply by the second control is 1 and the number of times of hypochlorous acid aqueous stock solution supply by the first control is 0, the cumulative humidification amount is about 0.67 times the capacity of the mixing tank 92About 2/3 times = about 2/3 x 1 times), the cumulative humidification amount was determined to be less than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of supply of the hypochlorous acid aqueous stock solution by the first control was 0, and it was determined that the number of times of execution of the first control did not reach the reference number of times (11 times).

Then, the determination result is received, and the first control is performed without performing the drainage of the mixed water stored in the mixing tank 92, and the hypochlorous acid aqueous stock solution is supplied from the hypochlorous acid aqueous generating unit 30 (hypochlorous acid aqueous supply unit 36) to the mixing tank 92. Thereby, the water level in the mixing tank 92 slightly rises. The water level of the mixed water is also reduced by the humidification purification operation, and the water is again deficient at the time b hours and c hours from the start of the operation, and the water is supplied from the water supply portion 50 until the mixing tank 92 becomes full.

Then, at the timing when the operation time after the start of the operation is 2 hours, the water discharge judgment is performed. In the humidification purification operation up to this point, the number of times of water supply by the second control is 3 and the number of times of hypochlorous acid aqueous stock solution supply by the first control is 1, so that the cumulative humidification amount is about 2.1 times the capacity of the mixing tank 92About 13/6 times = about 2/3 x 3 times + about 1/6 x 1 times), is determined to be equal to or greater than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of the first control to supply the hypochlorous acid aqueous stock solution was 1, and it was determined that the number of times of the first control was not up to the reference number (11 times). Then, the third control is performed in response to the determination result, and the mixed water in the mixing tank 92 is discharged. Further, after the third control is performed to drain the mixed water, the supply of the hypochlorous acid water stock solution and the supply of water are re-performed to the mixing tank 92, and the mixing tank 92 is in a state of being full of water due to the hypochlorous acid water (mixed water) of a predetermined concentration, as in the initial state (0 hours). Here, the accumulated humidification amount (the number of times of execution of the first control and the second control) is reset, and the storage of the accumulated humidification amount is started again.

Then, the same supply operation and drain operation were repeated every 2 hours, taking the timing of 2 hours as the initial state (0 hours). In more detail, as in the above, the supply of water by the second control at the timing of the water shortage and the supply of the hypochlorous acid water stock solution by the first control at the timing of the hypochlorous acid water supply are repeated. Then, the water discharge judgment of the mixed water based on the third control is performed immediately before the first control is performed, and the third control is performed in the case where the condition is satisfied.

Next, referring to fig. 3 b, a description will be given focusing on a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 92.

At the beginning of the operation (0 hours), the mixing tank 92 was mixed so that the mixed water of the hypochlorous acid aqueous stock solution and water became a predetermined concentration (initial concentration). Then, when the humidification purification operation is started, the concentration of hypochlorous acid water (mixed water) in the mixing tank 92 decreases with the lapse of time from the start of the operation to a hours. This is because hypochlorous acid is vaporized in a certain ratio with respect to the concentration of hypochlorous acid water and is given to air because the vapor pressure of hypochlorous acid is higher than that of water. In addition, since hypochlorous acid contained in water is consumed together with water miniaturized by the air purification unit 11 if hypochlorous acid is not gasified, the concentration of hypochlorous acid water in the mixing tank 92 does not change although hypochlorous acid water decreases at a constant rate according to the humidification amount. Further, even when the water level sensor 90 detects the water shortage, that is, a hours, the concentration of hypochlorous acid water is not zero, because hypochlorous acid water (mixed water) remains in the mixing tank 92 even when the water shortage is detected, as described above.

Then, when the time a is a hours from the start of the operation (water shortage detection), the hypochlorous acid water in the mixing tank 92 is diluted with water as the water from the water supply unit 50 is supplied, and thus the concentration of the hypochlorous acid water in the mixing tank 92 is reduced. Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by gasification of hypochlorous acid until 1 hour, which is the timing of supply of hypochlorous acid water.

When the supply timing of hypochlorous acid water is 1 hour from the start of operation, the concentration of hypochlorous acid water in the mixing tank 92 increases to the initial concentration or higher with the supply of hypochlorous acid water stock solution from the hypochlorous acid water generator 30 (hypochlorous acid water supply unit 36). This is because a predetermined amount of hypochlorous acid water (hypochlorous acid water stock solution) supplied at the start of operation is supplied to the mixed water (water containing hypochlorous acid) of a smaller amount than the water supplied at the start of operation (0 hours). Then, the concentration of hypochlorous acid water (mixed water) decreases by vaporization of hypochlorous acid until b hours from the start of operation (water shortage detection). The reduction rate of hypochlorous acid is faster than the initial operation because the amount of hypochlorous acid gasified increases in accordance with the amount of hypochlorous acid contained in the mixed water.

Then, when the time b is from the start of the operation (water shortage detection), the hypochlorous acid water in the mixing tank 92 is diluted with water as the water from the water supply unit 50 is supplied, and thus the concentration of the hypochlorous acid water in the mixing tank 92 is reduced. Similarly, the concentration is reduced by volatilization in the period from b hours (water shortage detection) to c hours (water shortage detection), and when the period is c hours (water shortage detection), the hypochlorous acid water in the mixing tank 92 is diluted with water by the supply of water from the water supply unit 50, and thus the concentration of hypochlorous acid water in the mixing tank 92 is reduced.

Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by gasification of hypochlorous acid until 2 hours, which is the timing of supply of hypochlorous acid water.

Then, when the timing of supply of hypochlorous acid water is 2 hours from the start of operation, the timing of water discharge is set based on the water discharge judgment, and thus the hypochlorous acid water (mixed water) in the mixing tank 92 is completely discharged, water and hypochlorous acid aqueous stock solution are supplied to the mixing tank 92, respectively, and the concentration of hypochlorous acid water in the mixing tank 92 is in the same state as that in the initial operation (0 hours). Then, the change in the concentration of hypochlorous acid water (mixed water) was repeated as before.

Next, description will be made focusing on the change with time of the concentration of hypochlorous acid contained in the air 9 of the discharge port 3, with reference to fig. 3 (c).

The concentration of hypochlorous acid contained in the air 9 discharged from the discharge port 3 is determined based on the humidification amount in the air cleaning portion 11 and the concentration of hypochlorous acid water in the mixing tank 92, but in the first example, the concentration of hypochlorous acid water in the mixing tank 92 is reflected because the humidification amount is constant. Accordingly, as shown in fig. 3 (c), the concentration of hypochlorous acid contained in the air 9 of the discharge port 3 increases and decreases in accordance with the increase and decrease in the concentration of hypochlorous acid water in the mixing tank 92 shown in fig. 3 (b).

Here, when the hypochlorous acid water stock solution and water are supplied to the water level sensor 90 every time the water shortage is detected as in the conventional case, the state from the start of the operation (0 hours) to a hours is repeated until the timing of 2 hours. In this case, the average concentration of hypochlorous acid contained in the air 9 of the discharge port 3 is, for example, the same as the conventional average concentration. In contrast, in the first example, the state was the same as the conventional state from the start of operation (0 hours) to a hours, but the state was different from the conventional state in the period from a hours to 2 hours.

More specifically, in the period from a hours to 2 hours, as shown in fig. 3 (b), the period in which the concentration of hypochlorous acid water is higher than the initial concentration (the period from 1 hour to b hours) is shorter than the period in which the concentration is lower than the initial concentration (the period from a hours to 1 hour and the period from b hours to 2 hours). Therefore, the average concentration of hypochlorous acid contained in the air 9 of the discharge port 3 becomes lower than the conventional average concentration in the period from the start of operation (0 hours) to 2 hours. Further, since the concentration change from 0 hours to 2 hours is repeated even after 2 hours, the concentration does not continuously rise, and the average concentration lower than the conventional concentration can be continuously maintained.

As described above, when the hypochlorous acid aqueous stock solution and water are supplied to the mixing tank 92 and the mixed water is stored, the supply cycle of the hypochlorous acid aqueous stock solution (every predetermined time) is made different from the supply cycle of the water (every water shortage detection), and the drainage treatment of the mixed water is performed according to the accumulated humidification amount, whereby the concentration of hypochlorous acid contained in the air 9 of the discharge port 3, that is, the air discharged to the indoor space 18 can be reduced as compared with the case where the hypochlorous acid aqueous stock solution and water are supplied to the mixing tank 92 in the conventional method.

Next, the operation state in summer in japan will be described. In addition, in summer in japan, since the outside air is humidified, the amount of humidification required for the air purification unit 11 is small, and water is supplied at intervals longer than that of hypochlorous acid water. That is, after the timing of the hypochlorous acid water supply, the water level in the mixing tank 92 becomes deficient.

Therefore, in the following, as a second example, the water discharge process (third control) under the humidification purification conditions in which the water supply is performed 1 time (second control) and the water stock solution of hypochlorous acid 8 times (first control) is performed during the period of 9 hours after the operation of the air purification unit 11 is started will be described.

The humidification purification conditions are set based on the fact that, when the amount of humidification required for the air purification portion 11 is smaller than the first reference value, the air purification portion 11 is controlled so that the number of times of the first control is greater than the number of times of the second control.

In the second example, as shown in fig. 4 (a), when the operation is started for 0 hour, the supply of the hypochlorous acid aqueous stock solution to the mixing tank 92 (first control) is performed at timings of 1 hour, 2 hours, and 3 hours … …. On the other hand, the supply of water to the mixing tank 92 (second control) is performed at the timing of a hours … …. At the time of 0 hour from the start of the operation, hypochlorous acid water and water are supplied to the mixing tank 92, and the mixing tank 92 is filled with hypochlorous acid water (mixed water) having a predetermined concentration (initial state).

The water discharge determination of the mixed water stored in the mixing tank 92 is performed immediately before the first control is executed at the timing of 1 hour, 2 hours, and 3 hours … ….

Specifically, since neither water nor hypochlorous acid aqueous stock solution is supplied to the mixing tank 92 at the timing of 1 hour, which is a period of 1 hour (a period of 0 hour or more and less than 1 hour) from the start of operation, it is determined that the cumulative humidification amount is less than the reference amount (2 times the capacity of the mixing tank 92). Further, it was determined that the number of times of supply of the hypochlorous acid aqueous stock solution by the first control was 0 times, and the number of times of execution of the first control did not reach the reference number of times (11 times). Then, the first control is executed in response to the determination result, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 92.

Next, the drainage determination of the mixed water was performed at a timing of 2 hours which is a period from 2 hours to the operation time after the start of the operation (a period from 0 hours to less than 2 hours). In the humidification purification operation up to this point, the cumulative humidification amount was the supply amount based on 1 first control (about 0.16 times the capacity of the mixing tank 92), and it was determined that the cumulative humidification amount was smaller than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of the first control to supply the hypochlorous acid aqueous stock solution was 1, and it was determined that the number of times of the first control was not up to the reference number (11 times). Then, the first control is executed in response to the determination result, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 92.

Then, the same control is performed until the timing of 8 hours, which is a period of 8 hours (a period of 0 hours or more and less than 8 hours) after the start of the operation.

Next, the water discharge determination of the mixed water was performed at a timing of 9 hours, which is a period from 9 hours to the operation time after the start of the operation (a period from 0 hours to less than 9 hours). In the humidification purification operation up to this point, the cumulative humidification amount was determined to be equal to or larger than the reference amount (2 times the capacity of the mixing tank 92) based on the supply amount of 8 times the first control and 1 time the second control (about 2 times the capacity of the mixing tank 92). Then, the third control is executed in response to the determination result, and the mixed water in the mixing tank 92 is discharged. Further, after the third control is performed, the supply of the hypochlorous acid aqueous stock solution and the supply of water are re-performed to the mixing tank 92, and the mixing tank 92 is in a state of being full of water due to hypochlorous acid water (mixed water) of a predetermined concentration, as in the initial state.

Then, the same supply operation and drain operation were repeated every 9 hours, taking the timing of 9 hours as the initial state (0 hours).

This will be described in more detail.

First, referring to fig. 4 (a), description will be made focusing on the change with time of the water level of hypochlorous acid water (mixed water) in the mixing tank 92.

At the beginning of the operation (0 hours), the mixing tank 92 is filled with the mixed water of the hypochlorous acid stock solution and water (also referred to as hypochlorous acid water) until it is full of water. Then, the amount of the mixed water was reduced at a constant rate by the humidification purification operation, and the supply timing of hypochlorous acid water was 1 hour. Then, at this 1 hour timing, the water discharge judgment of the mixed water was performed.

In the humidification purification operation up to this point, since neither the supply of water by the second control nor the supply of the hypochlorous acid aqueous stock solution by the first control is performed, it is determined that the cumulative humidification amount is smaller than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of supply of the hypochlorous acid aqueous stock solution by the first control was 0, and it was determined that the number of times of execution of the first control did not reach the reference number of times (11 times). Then, the determination result is received, and the first control is performed without performing the drainage of the mixed water stored in the mixing tank 92, and the hypochlorous acid aqueous stock solution is supplied from the hypochlorous acid aqueous generating unit 30 (hypochlorous acid aqueous supply unit 36) to the mixing tank 92. Thereby, the water level in the mixing tank 92 slightly rises. Then, also in the humidification purification operation, the water level of the mixed water was reduced, and the supply timing of the hypochlorous acid water was 2 hours. Then, the water discharge judgment of the mixed water was performed at this timing of 2 hours.

In the humidification purification operation up to this point, the number of times of supply of the hypochlorous acid aqueous stock solution by the first control is 1, and thus the cumulative amount of humidification is about 0.17 times the capacity of the mixing tank 92About 1/6 times=about 1/6×1 times), it is judged that the cumulative humidification amount is smaller than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of the first control to supply the hypochlorous acid aqueous stock solution was 1, and it was determined that the number of times of the first control was not up to the reference number (11 times). Then, the determination result is received, and the first control is performed without performing the drainage of the mixed water stored in the mixing tank 92, and the hypochlorous acid aqueous stock solution is supplied from the hypochlorous acid aqueous generating unit 30 (hypochlorous acid aqueous supply unit 36) to the mixing tank 92. Thereby, the water level in the mixing tank 92 slightly rises. Then, the amount of water of the mixed water is reduced at a certain rate due to the humidification purification operation. If this process is repeated after 2 hours, the amount of water to be mixed gradually decreases as a whole.

Then, when 8 hours have elapsed from the start of the operation, a water shortage is detected at a timing of a hours from the start of the operation, and water is supplied from the water supply unit 50 until the mixing tank 92 becomes full of water.

Then, the water level of the mixed water was reduced at a constant rate by the humidification purification operation, and the supply timing of the aqueous stock solution of hypochlorous acid was 9 hours. Then, the water discharge judgment of the mixed water was performed at the timing of 9 hours.

In the humidification purification operation up to this point, the number of times of water supply by the second control is 1 time, and the number of times of water stock solution supply by the first control is 8 times, so that the cumulative humidification amount is about 2 times (=about 2/3×1 times+about 1/6×8 times) the capacity of the mixing tank 92, and it is determined that the cumulative humidification amount is not less than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of the first control to supply the hypochlorous acid aqueous stock solution was 8, and it was determined that the number of times of the first control was not up to the reference number of times (11 times). Then, the third control is performed in response to the determination result, and the mixed water in the mixing tank 92 is discharged. Further, after the third control is performed to drain the mixed water, the supply of the hypochlorous acid water stock solution and the supply of water are re-performed to the mixing tank 92, and the mixing tank 92 is in a state of being full of water due to the hypochlorous acid water (mixed water) of a predetermined concentration, as in the initial state (0 hours). Here, the accumulated humidification amount (the number of times of execution of the first control and the second control) is reset, and the storage of the accumulated humidification amount is started again.

Then, the same supply operation and drain operation were repeated every 9 hours, taking the timing of 9 hours as the initial state (0 hours). In more detail, as in the above, the supply of water by the second control at the timing of the water shortage and the supply of hypochlorous acid water stock solution by the first control at the timing of the hypochlorous acid water supply are repeated. Then, immediately before the first control is executed, a water discharge judgment of the mixed water based on the third control is performed, and the third control is executed in a case where the condition is satisfied.

Next, referring to fig. 4 b, a description will be given focusing on a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 92.

At the beginning of the operation (0 hours), the mixing tank 92 was mixed so that the mixed water of the hypochlorous acid aqueous stock solution and water became a predetermined concentration (initial concentration). Then, when the humidification purification operation is started, the concentration of hypochlorous acid water (mixed water) in the mixing tank 92 decreases with the lapse of time from the start of the operation to 1 hour. This is because, as described above, hypochlorous acid has a higher vapor pressure than water, and thus hypochlorous acid is vaporized at a certain ratio to the concentration of hypochlorous acid water and supplied to the air.

Then, when the supply timing of hypochlorous acid water is 1 hour from the start of operation, the concentration of hypochlorous acid water in the mixing tank 92 increases to the initial concentration or higher with the supply of hypochlorous acid water stock solution from the hypochlorous acid water generator 30 (hypochlorous acid water supply unit 36). This is because, as described above, a predetermined amount of hypochlorous acid water (hypochlorous acid water stock solution) supplied at the start of operation is supplied to mixed water (water in a state including hypochlorous acid) having a smaller water amount than the mixed water stored at the start of operation (0 hours). Then, the concentration of hypochlorous acid water (mixed water) was decreased by vaporization of hypochlorous acid until 2 hours from the start of operation.

When the supply timing of hypochlorous acid water is 2 hours from the start of operation, the concentration of hypochlorous acid water in the mixing tank 92 further increases to the initial concentration or higher with the supply of hypochlorous acid water stock solution from the hypochlorous acid water generator 30 (hypochlorous acid water supply unit 36). Then, 3 hours from the start of the operation, the concentration of hypochlorous acid water (mixed water) was decreased by the vaporization of hypochlorous acid. Similarly, until the time of 8 hours thereafter, the change in the concentration of hypochlorous acid water (mixed water) was repeated, and the concentration of hypochlorous acid water (mixed water) was gradually increased.

Then, when the time a is a hours from the start of the operation (water shortage detection), the hypochlorous acid water in the mixing tank 92 is diluted with water as the water from the water supply unit 50 is supplied, and thus the concentration of the hypochlorous acid water in the mixing tank 92 is reduced. However, the concentration of hypochlorous acid water in the mixing tank 92 is maintained at the initial concentration or higher. Then, by the time of supply of the hypochlorous acid water, that is, 9 hours, the concentration of hypochlorous acid water (mixed water) was slightly reduced by vaporization of hypochlorous acid.

Then, when the supply timing of the hypochlorous acid aqueous stock solution is 9 hours from the start of the operation, the drainage timing is set based on the drainage judgment, so that after all of the hypochlorous acid aqueous solution (mixed water) in the mixing tank 92 is drained, water and the hypochlorous acid aqueous stock solution are supplied to the mixing tank 92, respectively, and the concentration of the hypochlorous acid aqueous solution in the mixing tank 92 is in the same state as the initial operation (0 hours). Then, similarly to the above, the concentration change of hypochlorous acid water (mixed water) is repeated.

Next, referring to fig. 4 (c), a description will be given focusing on the change with time of the concentration of hypochlorous acid contained in the air 9 of the discharge port 3.

Since the concentration of the hypochlorous acid contained in the air 9 discharged from the discharge port 3 is determined based on the humidification amount in the air cleaning unit 11 and the concentration of the hypochlorous acid water in the mixing tank 92 as in winter season of japan, the concentration of the hypochlorous acid contained in the air 9 discharged from the discharge port 3 increases and decreases in accordance with the increase and decrease in the concentration of the hypochlorous acid water in the mixing tank 92 as shown in fig. 4 (b).

Here, as in the prior art, when the hypochlorous acid aqueous stock solution and water are supplied to the water level sensor 90 every time the water shortage is detected, the concentration of hypochlorous acid water is continuously reduced from the start of the operation (0 hours) to 9 hours. In this case, the average concentration of hypochlorous acid contained in the air 9 of the discharge port 3 is, for example, the same as the conventional average concentration.

In contrast, in the second example, the state was the same as the conventional state from the start of operation (0 hours) to 1 hour, but the state was different from the conventional state in the period from 1 hour to 9 hours. More specifically, as shown in fig. 4 (b), the period from 1 hour to 9 hours is longer than the period in which the concentration of hypochlorous acid water is higher than the initial concentration, and longer than the period in which the concentration is lower than the initial concentration. Therefore, the average concentration of hypochlorous acid contained in the air 9 of the discharge port 3 is higher than the conventional average concentration in the period from the start of operation (0 hours) to 9 hours.

Next, the drain treatment (third control) under the humidification purification condition in which the humidification required amount is smaller than that of the second example in the summer operation condition in japan will be described.

Therefore, as a third example, the water discharge process (third control) under the humidification purification condition in which the water supply (second control) is not performed 1 time until the operation time after the start of the operation of the air purification unit 11 is 12 hours will be described below. That is, in the third example, only the supply of the hypochlorous acid aqueous stock solution (first control) is performed at predetermined intervals.

In the third example, as shown in fig. 5 (a), when the operation is started for 0 hour, the supply of the hypochlorous acid aqueous stock solution to the mixing tank 92 (first control) is delayed from the timing of 1 hour, 2 hours, and 3 hours … …, and is performed at the timings of a hours, B hours, and C hours … …. On the other hand, the supply of water to the mixing tank 92 (second control) is not performed at least until 12 hours. At the time of 0 hour from the start of the operation, hypochlorous acid water and water are supplied to the mixing tank 92, and the mixing tank 92 is filled with hypochlorous acid water (mixed water) having a predetermined concentration (initial state).

Here, the delay in the supply of the hypochlorous acid aqueous stock solution to the mixing tank 92 (first control) is caused by the fact that the amount of humidification by the air cleaning unit 11 is small, the time taken for the mixed water stored in the mixing tank 92 to be consumed is longer than 1 hour, the mixed water is consumed by the humidification cleaning process, and the water amount to be supplied to the mixing tank 92 is made to stand by until the water amount is smaller than the reference water amount (about 5/6 of the capacity of the mixing tank 92). The reference water amount is set based on the supply amount of the hypochlorous acid aqueous stock solution (about 1/6 of the capacity of the mixing tank 92). In the third example, the supply of the hypochlorous acid aqueous stock solution is performed at the timings of a hours, B hours, and C hours … …, which are delayed from the timings of 1 hour, 2 hours, and 3 hours … …, and the timings included in the "first control of hypochlorous acid water supply every predetermined time" in the claims are set.

The water discharge determination of the mixed water stored in the mixing tank 92 is performed immediately before the first control is executed at the timings of the a hour, the B hour, and the C hour … ….

Specifically, since the water or the hypochlorous acid aqueous stock solution is not supplied to the mixing tank 92 at the timing of a hours which is a period of time a (a period of time a is 0 hours or more and less than a hours) up to the time a hours corresponding to 1 hour after the start of the operation, it is determined that the cumulative humidification amount is less than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of supply of the hypochlorous acid aqueous stock solution by the first control was 0, and it was determined that the number of times of execution of the first control did not reach the reference number of times (11 times). Then, the first control is executed in response to the determination result, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 92. Further, since the hypochlorous acid aqueous stock solution is supplied in a state of being substantially the reference water amount, the mixing tank 92 is in a state of being filled with water by the supply of the hypochlorous acid aqueous stock solution under the first control.

Next, the drainage determination of the mixed water is performed at the timing of B hours which is a period (period in which the operation time is 0 hours or more and less than B hours) until the operation time after the start of the operation is B hours corresponding to 2 hours. In the humidification purification operation up to this point, the cumulative humidification amount was the supply amount based on 1 first control (about 0.16 times the capacity of the mixing tank 92), and it was determined that the cumulative humidification amount was smaller than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of the first control to supply the hypochlorous acid aqueous stock solution was 1, and it was determined that the number of times of the first control was not up to the reference number (11 times). Then, the first control is executed in response to the determination result, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 92.

Then, the same control is performed until the timing of K hours, which is a period (a period in which the operation time is 0 hours or more and less than K hours) until the operation time after the start of the operation is K hours corresponding to 11 hours.

Next, the water discharge determination of the mixed water is performed at the timing of L hours, which is a period (a period in which the operation time is 0 hours or more and less than L hours) until the operation time after the start of the operation is L hours corresponding to 12 hours. In the humidification purification operation up to this point, the cumulative humidification amount was determined to be smaller than the reference amount (2 times the capacity of the mixing tank 92) based on the supply amount of 11 times the first control (about 1.8 times the capacity of the mixing tank 92). Further, the number of times of the first control to supply the hypochlorous acid aqueous stock solution was 11, and it was determined that the number of times of the first control was the reference number of times (11 times). Then, the third control is performed in response to the determination result, and the mixed water in the mixing tank 92 is discharged. Further, after the third control is performed, the supply of the hypochlorous acid aqueous stock solution and the supply of water are re-performed to the mixing tank 92, and the mixing tank 92 is in a state of being full of water due to hypochlorous acid water (mixed water) of a predetermined concentration, similarly to the initial state.

Then, the same supply operation and drain operation are repeated every L hours, taking the timing of L hours as an initial state (0 hours).

Described in more detail.

First, referring to fig. 5 (a), description will be made focusing on the change with time of the water level of hypochlorous acid water (mixed water) in the mixing tank 92.

At the beginning of the operation (0 hours), the mixing tank 92 is filled with the mixed water of the hypochlorous acid stock solution and water (also referred to as hypochlorous acid water) until it is full of water. Then, the amount of the mixed water is reduced at a constant rate by the humidification purification operation, and the supply timing of hypochlorous acid water is a hours. Then, the water discharge judgment of the mixed water is performed at the timing of the a hour.

In the humidification purification operation up to this point, since neither the supply of water by the second control nor the supply of the hypochlorous acid aqueous stock solution by the first control is performed, it is determined that the cumulative humidification amount is smaller than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of supply of the hypochlorous acid aqueous stock solution by the first control was 0, and it was determined that the number of times of execution of the first control did not reach the reference number of times (11 times). Then, the determination result is received, and the first control is performed without performing the drainage of the mixed water stored in the mixing tank 92, and the hypochlorous acid aqueous stock solution is supplied from the hypochlorous acid aqueous generating unit 30 (hypochlorous acid aqueous supply unit 36) to the mixing tank 92. Thereby, the water level in the mixing tank 92 rises to a full state. Then, also in the humidification purification operation, the water level of the mixed water decreases, and the supply timing of the hypochlorous acid water is B hours. Then, the water discharge judgment of the mixed water is performed at the timing of this B hours.

In the humidification purification operation up to this point, the first control is performed on the number of times the hypochlorous acid aqueous stock solution is supplied1 time, thus the cumulative humidification amount is about 0.17 times the capacity of the mixing tank 92About 1/6 times=about 1/6×1 times), it is judged that the cumulative humidification amount is smaller than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of the first control to supply the hypochlorous acid aqueous stock solution was 1, and it was determined that the number of times of the first control was not up to the reference number (11 times). Then, the determination result is received, and the first control is performed without performing the drainage of the mixed water stored in the mixing tank 92, and the hypochlorous acid aqueous stock solution is supplied from the hypochlorous acid aqueous generating unit 30 (hypochlorous acid aqueous supply unit 36) to the mixing tank 92. Thereby, the water level in the mixing tank 92 rises to a full state. In this way, in the third example, the amount of the mixed water decreases at a constant rate due to the humidification purification operation, but the amount of the mixed water increases or decreases only between the full water state and the reference water amount.

Then, the mixed water was discharged at the timing of L hours, which is the timing of supply of the aqueous stock solution of hypochlorous acid.

In the humidification purification operation up to this point, since the number of times of the supply of the hypochlorous acid aqueous stock solution by the first control is 11, the cumulative amount of humidification is about 1.8 times the capacity of the mixing tank 92 About 1/6×11 times), it is judged that the cumulative humidifying amount is smaller than the reference amount (2 times the capacity of the mixing tank 92). Further, the number of times of the first control to supply the hypochlorous acid aqueous stock solution was 11, and it was determined that the number of times of the first control was executed reached the reference number of times (11 times). Then, the third control is performed in response to the determination result, and the mixed water in the mixing tank 92 is discharged. Further, after the third control is performed to drain the mixed water, the supply of the hypochlorous acid water stock solution and the supply of water are re-performed to the mixing tank 92, and the mixing tank 92 is in a state of being full of water due to the hypochlorous acid water (mixed water) of a predetermined concentration, similarly to the initial state (0 hours). Here, the accumulated humidification amount (the number of times of execution of the first control) is reset, and storage of the accumulated humidification amount is started again.

Then, the timing of L hours is regarded as an initial state (0 hours), and the same supply operation and drain operation are repeated every L hours. In more detail, as in the above, the first control is repeated at the timing of the supply of hypochlorous acid water to supply the hypochlorous acid water stock solution. Then, the water discharge judgment of the mixed water based on the third control is performed immediately before the first control is performed, and the third control is performed in the case where the condition is satisfied. Then, the water level of the hypochlorous acid water (mixed water) in the mixing tank 92 increases or decreases according to each operation.

Next, referring to fig. 5 b, a description will be given focusing on a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 92.

At the beginning of the operation (0 hours), the mixing tank 92 was mixed so that the mixed water of the hypochlorous acid aqueous stock solution and water became a predetermined concentration (initial concentration). Then, when the humidification purification operation is started, the concentration of hypochlorous acid water (mixed water) in the mixing tank 92 decreases with the passage of time from the start of the operation to the time of a hours. This is because, as described above, hypochlorous acid is vaporized in a certain proportion to the concentration of hypochlorous acid water and is given to air because the vapor pressure of hypochlorous acid is higher than that of water.

Then, when the supply timing of hypochlorous acid water is a hour from the start of operation, the concentration of hypochlorous acid water in the mixing tank 92 increases to the initial concentration or higher with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generator 30 (hypochlorous acid water supply unit 36). This is because, as described above, a predetermined amount of hypochlorous acid water (hypochlorous acid water stock solution) supplied at the start of operation is supplied to mixed water (water in a state including hypochlorous acid) having a smaller water amount than the mixed water stored at the start of operation (0 hours). Then, from the start of the operation to B hours, the concentration of hypochlorous acid water (mixed water) decreases due to vaporization of hypochlorous acid.

When B hours are counted from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 92 further increases to the initial concentration or higher with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generator 30 (hypochlorous acid water supply unit 36). Then, until C hours from the start of operation, the concentration of hypochlorous acid water (mixed water) decreases due to vaporization of hypochlorous acid. Until the timing of K hours thereafter, similarly, the change in the concentration of hypochlorous acid water (mixed water) was repeated, and the concentration of hypochlorous acid water (mixed water) was gradually increased.

Then, when the supply timing of the hypochlorous acid aqueous stock solution is L hours from the start of the operation, the water discharge timing is set based on the water discharge judgment, and therefore, after all of the hypochlorous acid aqueous solution (mixed water) in the mixing tank 92 is discharged, water and the hypochlorous acid aqueous stock solution are supplied to the mixing tank 92, respectively, and the concentration of the hypochlorous acid aqueous solution in the mixing tank 92 is in the same state as the initial operation (0 hours). Then, similarly to the above, the concentration change of hypochlorous acid water (mixed water) is repeated.

Next, referring to fig. 5 (c), a description will be given focusing on the change with time of the concentration of hypochlorous acid contained in the air 9 of the discharge port 3.

Since the concentration of the hypochlorous acid contained in the air 9 discharged from the discharge port 3 is determined based on the humidification amount in the air cleaning unit 11 and the concentration of the hypochlorous acid water in the mixing tank 92 as in winter season of japan, the concentration of the hypochlorous acid contained in the air 9 discharged from the discharge port 3 increases and decreases in accordance with the increase and decrease in the concentration of the hypochlorous acid water in the mixing tank 92 as shown in fig. 5 (b).

Here, as in the prior art, when the hypochlorous acid water stock solution and water are supplied to fill up the water whenever the water level sensor 90 detects a lack of water, the concentration of hypochlorous acid water is continuously reduced from the start of operation (0 hours) to L hours. In this case, the average concentration of hypochlorous acid contained in the air 9 of the discharge port 3 is, for example, the same as the conventional average concentration.

In contrast, in the third example, the state was the same as the conventional state from the start of operation (0 hours) to the a hours, but the state was different from the conventional state in the period from the a hours to the L hours. More specifically, as shown in fig. 5 (b), the period from the a-hour to the L-hour is longer than the period in which the concentration of hypochlorous acid water is higher than the initial concentration. Therefore, the average concentration of hypochlorous acid contained in the air 9 of the discharge port 3 is higher than the conventional average concentration in the period from the start of operation (0 hours) to 12 hours.

Then, since the change in the concentration of the mixed water is repeated every L hours after L hours, the concentration of hypochlorous acid water can be continuously adjusted within a range of a predetermined concentration or less without continuously increasing the concentration of hypochlorous acid water, by setting the cycle to 1 for L hours. That is, if the humidification purification operation is continued, the concentration of hypochlorous acid water in the mixing tank 92 may excessively rise, but by providing the water discharge judgment control in accordance with the number of times the hypochlorous acid water stock solution is supplied by the first control, the concentration of hypochlorous acid water in the mixing tank 92 can be reset at a constant interval, and the amount of hypochlorous acid contained in the air 9 of the discharge port 3 can be reset, and the supply amount of hypochlorous acid gas to the indoor space 18 can be controlled.

As described above, in the space purification system 100, hypochlorous acid water is supplied into the mixing tank 92 at intervals of a predetermined time (for example, 1 hour) as the first control, the water supply process is performed based on the water level information (water shortage signal) from the water level sensor 90 as the second control, and the mixed water in the mixing tank 92 is discharged based on the accumulated humidification amount or the number of times of execution of the first control as the third control. Further, the air purification control unit 41 of the space purification system 100 makes the number of times the first control is performed in the predetermined period different from the number of times the second control is performed in the predetermined period, based on the humidification request amount (the humidification request amount corresponding to winter in japan or the humidification request amount corresponding to summer in japan) requested to the air purification unit 11. Thus, in a state where the humidification demand is high as in winter in japan, the air 9 in a state where the hypochlorous acid amount is small can be released into the indoor space 18 as compared with the conventional method, and in a state where the humidification demand is low as in summer in japan, the air 9 in a state where the hypochlorous acid amount is large can be released into the indoor space 18 as compared with the conventional method. Further, when the humidification purification operation is continued for a long period of time, an excessive increase in the hypochlorous acid concentration released into the indoor space 18 can be suppressed.

That is, by operating the supply of hypochlorous acid water, the supply of water, and the drainage of mixed water by the respective trigger factors, the concentration of hypochlorous acid water (the concentration of hypochlorous acid contained in the air 9 discharged to the indoor space 18) in the mixing tank 92 can be adjusted by simple control (first control, second control, third control).

As described above, the space purification system 100 according to embodiment 1 can have the following effects.

(1) The space purification system 100 includes: a hypochlorous acid water generation unit 30 for generating hypochlorous acid water; a hypochlorous acid water supply unit 36 for supplying hypochlorous acid water from the hypochlorous acid water generation unit 30 to the mixing tank 92; a water supply unit 50 for supplying water to the mixing tank 92; a water level sensor 90 for detecting the water level of the mixing tank 92; an air purifying unit 11 for miniaturizing the mixed water of hypochlorous acid water and water stored in the mixing tank 92 and releasing the same into the air; and an air purification control unit 41 for controlling the supply process of hypochlorous acid water supply unit 36 and water supply unit 50, and the discharge process of the mixed water stored in mixing tank 92. The air cleaning control unit 41 performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit 36 at predetermined intervals (for example, 60 minutes), and a second control of supplying water by the water supply unit 50 based on information (water shortage information) on the water level of the mixing tank 92 from the water level sensor 90, and performs, as a drain process, a third control of draining mixed water stored in the mixing tank 92 based on the accumulated humidification amount in the air cleaning unit 11.

Accordingly, when the air having a relatively high humidity is ventilated as in summer in japan, the consumption of the mixed water stored in the mixing tank 92 is small, and therefore, the frequency of supply of hypochlorous acid water to the mixing tank 92 (the number of times of performing the first control) increases, and in a state where the hypochlorous acid concentration of the mixed water in the mixing tank 92 is high, the mixed water is miniaturized and released into the air. Further, since the consumption amount of the mixed water stored in the mixing tank 92 is small, the frequency of the discharge of the mixed water (the number of times of performing the third control) is reduced, and the hypochlorous acid concentration of the mixed water in the mixing tank 92 can be maintained high. As a result, even in a situation where the hypochlorous acid water having been micronized is difficult to gasify, hypochlorous acid having a concentration as high as a predetermined level can be contained in the air and released into the indoor space 18.

On the other hand, when air having a relatively low humidity is ventilated as in winter in japan, the consumption of the mixed water stored in the mixing tank 92 increases, and therefore the frequency of supplying water to the mixing tank 92 (the number of times of performing the second control) increases, and the mixed water is pulverized and released into the air in a state where the hypochlorous acid concentration of the mixed water in the mixing tank 92 is low. Further, since the consumption amount of the mixed water stored in the mixing tank 92 is large, the frequency of the discharge of the mixed water in the mixing tank 92 (the number of times of performing the third control) becomes large, and the hypochlorous acid concentration of the mixed water can be suppressed from becoming excessively high. As a result, even in a case where the hypochlorous acid water having been pulverized is easily gasified, hypochlorous acid having a concentration as low as a predetermined concentration can be contained in the air and released into the indoor space 18.

That is, in the space purification system 100, the amount of hypochlorous acid released into the air can be easily adjusted.

(2) In the space purification system 100, the air purification control unit 41 executes the third control when the accumulated humidification amount is equal to or greater than the reference amount. Thereby, the space purification system 100 can easily adjust the concentration of hypochlorous acid water stored in the mixing tank 92 based on the humidification amount in the air purification unit 11.

(3) In the spatial purification system 100, the cumulative humidification amount is calculated based on the number of times the first control and the second control are executed. Thus, the space purification system 100 can calculate the cumulative humidification amount easily and accurately, and can improve the control efficiency of the third control.

(4) In the space purification system 100, the air purification control unit 41 executes the third control when the number of times the first control is performed is the reference number of times. Thus, in the space purification system 100, even in the case of long-term operation (for example, 24 hours), the state in the mixing tank 92 can be restored to the operation-initial state by executing the third control of draining the mixed water stored in the mixing tank 92 before the hypochlorous acid water concentration in the mixing tank 92 becomes excessively high. That is, the space purification system 100 can easily adjust the amount of hypochlorous acid released into the air.

(5) In the space purification system 100, the air purification control portion 41 performs the third control immediately before the first control is performed. In this way, in the space purification system 100, since the third control is not performed any more after hypochlorous acid is supplied to the mixing tank 92 by the first control, the hypochlorous acid water supplied by the first control can be used continuously for the maximum extent, and waste caused by the third control is reduced.

Here, the air purification control portion 41 may execute the third control immediately before the second control is executed in addition to immediately before the first control is executed, or may execute only immediately before the second control is executed. In this way, in the space purification system 100, since the third control is not performed immediately after hypochlorous acid is supplied to the mixing tank 92 by the first control or immediately after water is supplied by the second control, the hypochlorous acid water supplied by the first control or the water supplied by the second control can be used continuously for the maximum, and waste due to the water discharge in the third control can be reduced.

(6) In the space purification system 100, the air purification control unit 41 performs control such that the number of times the first control is performed is smaller than the number of times the second control is performed when the humidification demand required for the air purification unit 11 is equal to or greater than the first reference value during the supply process, and performs control such that the number of times the first control is performed is greater than the number of times the second control is performed when the humidification demand is smaller than the first reference value. In this way, in the space purification system 100, in the case where the humidification demand is smaller than the first reference value during the supply process, the mixed water can be pulverized and released into the air in a state where the hypochlorous acid concentration in the mixing tank 92 is high. On the other hand, when the humidification demand is equal to or greater than the first reference value, the mixed water can be pulverized and released into the air in a state where the hypochlorous acid concentration in the mixing tank 92 is low. That is, in the space purification system 100, hypochlorous acid can be added to the air 9 released from the air purification unit 11 under conditions suitable for the environment of the indoor space 18 based on the humidification demand.

The present disclosure has been described above based on the embodiments. The embodiments are examples, and those skilled in the art will understand that various modifications can be made to the respective components or combinations of the respective processing procedures, and that these modifications are also within the scope of the present disclosure.

In the first, second, and third examples of the space purification system 100 according to embodiment 1, the air purification unit 11 is described as operating at a constant humidification request amount during the humidification purification operation time, but actually operates at a humidification request amount determined based on the humidity difference between the target humidity and the humidity of the air in the indoor space 18 at regular intervals.

In the space purification system 100 according to the present embodiment, the cumulative humidification amount is calculated based on the number of times the first control is executed and the number of times the second control is executed, but the present invention is not limited to this. For example, by providing temperature and humidity sensors before and after the air passage of the space purifying device 10, the cumulative humidification amount may be calculated from the amount of change in temperature and humidity obtained from the temperature and humidity sensors.

In the space purification system 100 according to the present embodiment, the reference number of times is set to 11 times immediately before the reference amount is reached by the supply of hypochlorous acid water by the first control, but the present invention is not limited to this. For example, the reference number of times may be set based on the concentration of hypochlorous acid water supplied by the first control, that is, the concentration of hypochlorous acid water generated in the hypochlorous acid water generating unit 30. This can drain the mixed water stored in the mixing tank 92 before the hypochlorous acid water concentration in the mixing tank 92 becomes too high.

(embodiment 2)

As a conventional space purification apparatus, an air conditioning system is known in which air supplied into a room is brought into contact with a gas-liquid contact member portion containing a purification component and released to sterilize the space (for example, refer to patent document 1).

In such a conventional space purification apparatus, in general, in addition to the release of the water to be miniaturized, water stored in the apparatus (water containing a purification component) is gasified and released into a space in association with the miniaturization operation.

However, in the conventional space purification apparatus, in a case where the amount of humidification required for the indoor space is small, for example, in summer (particularly, in a rainy day) in japan, when air having a relatively high humidity (for example, 12 ℃ and 95%) after dehumidification by an air conditioner or the like is ventilated, the purified water (hypochlorous acid water) containing the purified component is difficult to gasify, and therefore the purified component (hypochlorous acid) is not gasified, and it is difficult to release the purified component into the indoor space. On the other hand, in a case where the required humidification amount is large, for example, in winter in japan, when warm air having relatively low humidity (for example, 30% at 20 ℃) is ventilated, the purified water containing the purified component is easily vaporized, and thus the purified component is released in a large amount into the indoor space. That is, in the conventional space purifying apparatus, there is a problem that it is not easy to adjust the amount of the purifying component released into the indoor space (in the air).

Accordingly, the present disclosure solves the above-described conventional problems, and an object thereof is to provide a technique capable of easily adjusting the amount of a purification component released into the air.

In order to achieve the object, a spatial purification system according to the present disclosure includes: a hypochlorous acid water generation unit for generating hypochlorous acid water; a hypochlorous acid water supply unit for supplying hypochlorous acid water from the hypochlorous acid water supply unit to the mixing tank; a water supply unit for supplying water to the mixing tank; a water level sensor for detecting the water level of the mixing tank; a humidification/purification unit for micronizing the mixed water of hypochlorous acid water and water stored in the mixing tank and releasing the micronized mixed water into the air; and a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank. The control unit performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit and a second control of supplying water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, respectively, and performs, as a drain process, a third control of draining mixed water stored in the mixing tank when the first control is continuously performed a predetermined number of times, thereby achieving a desired object.

With the spatial purification system according to the present disclosure, the amount of the purification component released into the air can be easily adjusted.

To explain again, the spatial purification system according to the present disclosure includes: a hypochlorous acid water generation unit for generating hypochlorous acid water; a hypochlorous acid water supply unit for supplying hypochlorous acid water from the hypochlorous acid water supply unit to the mixing tank; a water supply unit for supplying water to the mixing tank; a water level sensor for detecting the water level of the mixing tank; a humidification/purification unit for micronizing the mixed water of hypochlorous acid water and water stored in the mixing tank and releasing the micronized mixed water into the air; and a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank. The control unit performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit at predetermined intervals and a second control of supplying water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, and performs, as a drain process, a third control of draining mixed water stored in the mixing tank when the first control is continuously performed a predetermined number of times.

In this way, when air having a relatively high humidity is ventilated as in summer in japan, the consumption of the mixed water stored in the mixing tank is small, and therefore, the frequency of supply of hypochlorous acid water to the mixing tank (the number of times of performing the first control) increases, and in a state where the hypochlorous acid concentration of the mixed water in the mixing tank is high, the mixed water is miniaturized and released into the air. In this case, when the first control is continuously performed a predetermined number of times, the third control is performed to discharge the mixed water stored in the mixing tank and reset the mixed water in the mixing tank, so that the hypochlorous acid concentration in the mixing tank can be prevented from being excessively increased. As a result, even in a situation where the hypochlorous acid water having been micronized is difficult to gasify, hypochlorous acid having a concentration as high as a predetermined level can be contained in the air and released into the indoor space. On the other hand, when air having a relatively low humidity is ventilated as in winter in japan, the consumption of the mixed water stored in the mixing tank increases, and therefore, the frequency of supplying water to the mixing tank (the number of times of performing the second control) increases, and the mixed water is pulverized and released into the air in a state where the hypochlorous acid concentration of the mixed water in the mixing tank is low. As a result, even in a case where the hypochlorous acid water having been pulverized is easily gasified, hypochlorous acid having a concentration as low as a predetermined concentration can be contained in the air and released into the indoor space. That is, in the space purifying system, the amount of hypochlorous acid released into the air can be easily adjusted.

In the spatial purification system according to the present disclosure, the control unit preferably executes the third control immediately before executing the first control after continuously executing the first control a predetermined number of times. In this way, in the space purification system, since the third control is not performed any more after hypochlorous acid is supplied to the mixing tank by the first control, the hypochlorous acid water supplied by the first control can be used continuously for a maximum extent, and waste caused by the third control can be reduced.

In the space purification system according to the present disclosure, the control unit preferably sets the predetermined number of times in the third control based on the concentration of hypochlorous acid water supplied by the first control. Thus, for example, in the space purification system, when the concentration of hypochlorous acid water supplied by the first control is high, if the first control is continuously performed a predetermined number of times, the increase in the concentration of hypochlorous acid water in the mixing tank is fast, and therefore, by setting a predetermined number of times less, it is possible to more reliably suppress the excessive increase in the concentration of hypochlorous acid water in the mixing tank.

The following describes modes for carrying out the present disclosure with reference to the drawings. The following embodiments are examples for embodying the present disclosure, and do not limit the technical scope of the present disclosure. In all the drawings, the same parts are denoted by the same reference numerals, and description thereof is omitted. Further, in the details of the respective portions not directly related to the present disclosure, the description of each drawing is omitted in order to avoid repetition.

Fig. 6 is a diagram showing a configuration of a spatial purification system 1100 according to embodiment 2 of the present disclosure. The space purification system 1100 is a device that, when circulating air in the indoor space 1018, performs a cooling process (dehumidification process) or a heating process as necessary on the air 1008 (RA 1) from the indoor space 1018, and includes water that is micronized and a component that performs air purification (hereinafter, simply referred to as "air purification component") on the air 1008 that circulates inside. The space purification system 1100 performs sterilization and deodorization of the indoor space 1018 by supplying the air 1009 (SA 1) flowing inside to the indoor space 1018. Hypochlorous acid is used as the air-purifying component, and the water containing the air-purifying component is hypochlorous acid water.

As shown in fig. 6, the space purification system 1100 is mainly configured to include a space purification device 1010, an air conditioning device 1015, and a hypochlorous acid water generation unit 1030.

The space purification apparatus 1010 includes an ejection port 1003, an air purification unit 1011, and an air purification control unit 1041. The air conditioning apparatus 1015 includes a suction port 1002, a blower 1013, a refrigerant coil 1014, and an air conditioning control unit 1042. The space purifying apparatus 1010 and the air conditioning apparatus 1015 have housings constituting outer frames of the apparatus, respectively, and the space purifying apparatus 1010 and the air conditioning apparatus 1015 are connected by a duct 1024. Further, a suction port 1002 is formed in a side surface of the air conditioning device 1015, and a discharge port 1003 is formed in a side surface of the space purification device 1010.

The intake 1002 is an intake for taking in air 1008 from the indoor space 1018 into the air conditioner 1015. The suction port 1002 communicates with an indoor suction port 1016a provided in a ceiling or the like of the indoor space 1018 via a duct 1016. Thus, the intake port 1002 can suck air in the indoor space 1018 from the indoor intake port 1016a into the air-conditioning apparatus 1015.

The ejection port 1003 ejects the air 1009 (SA 1) flowing through the space purification apparatus 1010 to the indoor space 1018. The discharge port 1003 communicates with an indoor discharge port 1017a provided in a ceiling or the like of the indoor space 1018 via a duct 1017. Thereby, the jet port 1003 can jet the air 1009 flowing in the space purifying apparatus 1010 from the indoor jet port 1017a to the indoor space 1018.

In addition, inside the air conditioning apparatus 1015 and the space purifying apparatus 1010, air passages (a front-stage air passage 1004, a middle-stage air passage 1005, and a rear-stage air passage 1006) are formed that communicate the suction port 1002 with the discharge port 1003 via a duct 1024. The front stage air duct 1004 is an air duct adjacent to the suction port 1002. The front stage air duct 1004 is provided with a blower 1013 and a refrigerant coil 1014.

The middle duct 1005 is a duct through which air 1008 flowing through the front duct 1004 flows at a position adjacent to the front duct 1004 (duct 1024). An air purifying section 1011 provided in the middle air duct 1005.

The rear-stage air passage 1006 is an air passage adjacent to the discharge port 1003, and in the rear-stage air passage 1006, air 1008 flowing through the middle-stage air passage 1005 flows through the air cleaning unit 1011 to become air 1009 containing water and hypochlorous acid which are micronized.

In the air conditioner 1015 and the space purifying device 1010, the air 1008 sucked from the suction port 1002 flows through the front-stage air duct 1004, flows through the middle-stage air duct 1005 and the rear-stage air duct 1006, and is discharged as air 1009 from the discharge port 1003.

The blower 1013 of the air conditioner 1015 is a device for conveying the air 1008 (RA 1) of the indoor space 1018 from the suction inlet 1002 into the air conditioner 1015. The fan 1013 is provided upstream of the refrigerant coil 1014 in the front stage air passage 1004. In the blower 1013, on/off of the operation is controlled based on the blower output information from the air conditioning control unit 1042. By operating the blower 1013, the air 1008 in the indoor space 1018 is taken into the air conditioner 1015 and goes to the refrigerant coil 1014.

The refrigerant coil 1014 is disposed downstream of the blower 1013 in the front stage air duct 1004, and cools or heats the introduced air 1008. The refrigerant coil 1014 changes the output state (cooling, heating, or turning off) according to the output signal from the air conditioning control unit 1042, and adjusts the cooling capacity (cooling amount) or heating capacity (heating amount) of the introduced air 1008. In the refrigerant coil 1014, when the introduced air 1008 is cooled, the introduced air 1008 is dehumidified, and therefore the cooling capacity (cooling amount) for the air 1008 may be also referred to as the dehumidifying capacity (dehumidifying amount) for the air 1008.

The refrigerant coil 1014 functions as a heat absorber or a radiator in a refrigeration cycle including a compressor, a radiator, an expander, and a heat absorber, and is configured to absorb heat (cool) or dissipate heat (heat) when the refrigerant introduced from the outdoor unit 1020 flows therein. More specifically, the refrigerant coil 1014 is connected to the outdoor unit 1020 via a refrigerant circuit 1021 through which the refrigerant flows. The outdoor unit 1020 is an outdoor unit provided in the outdoor space 1019, and includes a compressor 1020a, an expander 1020b, an outdoor heat exchanger 1020c, a blower fan 1020d, and a four-way valve 1020e. Since the outdoor unit 1020 can be configured as a device having a general structure, detailed descriptions of the respective devices (the compressor 1020a, the expander 1020b, the outdoor heat exchanger 1020c, the blower fan 1020d, and the four-way valve 1020 e) are omitted.

Since the four-way valve 1020e is connected to the refrigeration cycle including the refrigerant coil 1014, the air-conditioning apparatus 1015 can switch between a cooling mode (dehumidifying mode) in which the four-way valve 1020e circulates the refrigerant in the first direction and cools the air (air 1008) to dehumidify the air, and a heating mode in which the four-way valve 1020e circulates the refrigerant in the second direction and heats the air (air 1008).

Here, the first direction is a direction in which the refrigerant flows through the compressor 1020a, the outdoor heat exchanger 1020c, the expander 1020b, and the refrigerant coil 1014 in this order. The second direction is a direction in which the refrigerant flows through the compressor 1020a, the refrigerant coil 1014, the expander 1020b, and the outdoor heat exchanger 1020c in this order. The refrigerant coil 1014 can cool or heat the introduced air (air 1008).

The air purifying unit 1011 of the space purifying apparatus 1010 is a unit for humidifying the air 1008 taken into the space, and includes water and hypochlorous acid which are micronized into air when humidifying the air. More specifically, the air cleaning unit 1011 includes a mixing tank 1092, a water level sensor 1090, a humidifying motor 1011a, and a humidifying nozzle 1011b. The air cleaning unit 1011 is configured to rotate the humidifying nozzle 1011b by using the humidifying motor 1011a, and to suck the hypochlorous acid water stored in the mixing tank 1092 of the air cleaning unit 1011 by centrifugal force, and to scatter, collide and pulverize the hypochlorous acid water to the surrounding (centrifugal direction) so that the passing air contains water. The air purification unit 1011 changes the number of revolutions (hereinafter, rotational output value) of the humidification motor 1011a based on an output signal from the air purification control unit 1041, and adjusts the humidification capacity (humidification amount). The humidification amount may also be referred to as an additional amount of hypochlorous acid added to the air. The air purifying unit 1011 corresponds to a "humidification purifying unit" in the claims.

The water level sensor 1090 measures the water level of the hypochlorous acid water stored in the mixing tank 1092, and outputs the measured value to the air cleaning control unit 1041. More specifically, the water level sensor 1090 measures the water level of the hypochlorous acid water stored in the mixing tank 1092 and the water level of the mixing tank 1092 in the water shortage state as the water level of the hypochlorous acid water stored in the mixing tank 1092, and outputs the measured values as water level information to the air cleaning control unit 1041. In the present embodiment, the water level at which the mixing tank 1092 is in the water shortage state is set to a water level at which the hypochlorous acid amount of hypochlorous acid water in the mixing tank 1092 is reduced from the full water state to about 1/3.

The mixing tank 1092 is a tank for storing hypochlorous acid water in the air cleaning unit 1011, and may be referred to as a water storage unit. In the mixing tank 1092, hypochlorous acid water of a predetermined concentration supplied from a hypochlorous acid water supply unit 1036 described later and water supplied from a water supply unit 1050 described later are mixed in the tank, and stored as mixed water containing diluted hypochlorous acid water. The hypochlorous acid water (mixed water) stored in the mixing tank 1092 can be discharged to the outside from the mixing tank 1092 through the water discharge unit 1060 that operates according to the output signal from the air purification control unit 1041.

The hypochlorous acid water generating section 1030 includes an electrolytic bath 1031, an electrode 1032, an electromagnetic valve 1033, a brine tank 1034, a brine transfer pump 1035, a water level sensor 1039, and a hypochlorous acid water supplying section 1036.

Brine tank 1034 stores brine, and supplies brine to electrolytic bath 1031 via brine transfer pump 1035 in accordance with an output signal from air purification control unit 1041. The electrolytic tank 1031 stores brine, which is an electrolysis target supplied from the brine tank 1034. According to the output signal from the air purification control unit 1041, tap water is supplied from a water supply pipe such as a tap water pipe to the electrolytic cell 1031 via the solenoid valve 1033, and the supplied tap water is mixed with brine, and brine of a predetermined concentration is stored. The electrode 1032 is disposed in the electrolytic bath 1031, and is energized to electrolyze the brine for a predetermined time based on an output signal from the air cleaning control unit 1041, thereby generating hypochlorous acid water having a predetermined concentration. That is, the electrolytic bath 1031 generates hypochlorous acid water by electrolyzing an aqueous chloride solution (for example, an aqueous sodium chloride solution) as an electrolyte between a pair of electrodes. Since a general device can be used for the electrolytic bath 1031, a detailed description thereof will be omitted. The electrolyte is an electrolyte capable of generating hypochlorous acid water, and is not particularly limited as long as it contains chloride ions even in a small amount, and examples of the solute include an aqueous solution in which sodium chloride, calcium chloride, magnesium chloride, or the like is dissolved. In addition, there is no problem even with hydrochloric acid. In this embodiment, as the electrolyte, a sodium chloride aqueous solution (brine) in which sodium chloride is added to water is used.

The water level sensor 1039 measures the water level in the electrolytic bath 1031, and outputs the measured value to the air cleaning control unit 1041.

The hypochlorous acid water supply unit 1036 supplies hypochlorous acid water from the electrolytic bath 1031 to the mixing tank 1092 of the air cleaning unit 1011 based on the output signal from the air cleaning control unit 1041. The hypochlorous acid water supply unit 1036 includes a hypochlorous acid water transfer pump 1037 and a water supply pipe 1038. The hypochlorous acid water transfer pump 1037 sends the hypochlorous acid water of the electrolytic bath 1031 to the water sending pipe 1038 based on the output signal from the air cleaning control unit 1041. The water supply pipe 1038 is connected between the hypochlorous acid water supply pump 1037 and the mixing tank 1092, and supplies hypochlorous acid water to the mixing tank 1092.

The water supply unit 1050 supplies water to the mixing tank 1092 based on an output signal from the air cleaning control unit 1041. The water supply unit 1050 includes a solenoid valve 1051 and a water pipe 1052. The solenoid valve 1051 controls whether or not to allow water supplied from a tap water pipe outside the space purification apparatus 1010 to flow to the water pipe 1052, based on an output signal from the air purification control unit 1041. The water pipe 1052 is connected between the solenoid valve 1051 and the mixing tank 1092, and supplies water to the mixing tank 1092.

The drain unit 1060 is connected to the bottom of the mixing tank 1092, and discharges the mixed water stored in the mixing tank 1092 to the outside based on an output signal from the air cleaning control unit 1041. The drain portion 1060 has a solenoid valve 1061 and a water feed pipe 1062. The solenoid valve 1061 controls whether or not to allow the mixed water stored in the mixing tank 1092 to flow to an external drain pipe based on an output signal from the air purification control unit 1041. The water supply pipe 1062 is connected between the mixing tank 1092 and the solenoid valve 1061, and supplies the mixed water to an external drain pipe.

In the air cleaning unit 1011, hypochlorous acid water from the hypochlorous acid water supply unit 1036 and water from the water supply unit 1050 are supplied to the mixing tank 1092, respectively. The hypochlorous acid water and water are mixed in the mixing tank 1092 of the air cleaning unit 1011. The mixed water of hypochlorous acid water and water is also called hypochlorous acid water. More specifically, in the mixing tank 1092 of the air cleaning unit 1011, hypochlorous acid water from the hypochlorous acid water supply unit 1036 or water from the water supply unit 1050 is supplied to the hypochlorous acid water remaining in the mixing tank 1092, respectively, and mixed. The air cleaning unit 1011 centrifugally pulverizes the mixed water of hypochlorous acid water and water stored in the mixing tank 1092, thereby releasing hypochlorous acid water into the indoor space 1018. The micronized hypochlorous acid water is released into the indoor space 1018 in a state where the liquid component is evaporated.

An operation device 1043 is provided on a wall surface of the indoor space 1018. The operation device 1043 is provided with a user interface operable by a user, and receives a temperature setting value and a humidity setting value from the user. The operation device 1043 includes a temperature and humidity sensor 1044, and the temperature and humidity sensor 1044 measures the temperature and humidity of the air in the indoor space 1018. The temperature and humidity in the temperature and humidity sensor 1044 may be measured by a known technique, and therefore, the description thereof is omitted here.

The operation device 1043 is connected to the air cleaning control unit 1041 and the air conditioning control unit 1042 by a wire or wirelessly, and transmits a temperature set value, a humidity set value, a temperature measured value, and a humidity measured value to the air cleaning control unit 1041 and the air conditioning control unit 1042. The information may be transmitted in a concentrated manner, or any 2 or more pieces may be transmitted in a concentrated manner, or they may be transmitted separately. The operation device 1043 may send information to the air purification control unit 1041, and the air purification control unit 1041 may transfer information to the air conditioning control unit 1042.

The air conditioning control unit 1042 of the air conditioning apparatus 1015 receives the temperature set point and the temperature measured value, and controls the refrigerant coil 1014 and the outdoor unit 1020 so that the temperature measured value approaches the temperature set point. In the heating mode, the air conditioning control unit 1042 increases the degree of heating as the difference between the temperature measured value and the temperature set value increases when the temperature measured value is lower than the temperature set value.

Next, the air purification control unit 1041 of the space purification apparatus 1010 will be described.

The air cleaning control unit 1041 controls, as the treatment operations of the hypochlorous acid water generating unit 1030 and the space cleaning apparatus 1010, the operation related to the electrolytic treatment in the electrolytic bath 1031, the operation related to the supply treatment of hypochlorous acid water to the air cleaning unit 1011, the operation related to the supply treatment of water to the air cleaning unit 1011, the operation related to the humidification cleaning treatment in the air cleaning unit 1011, and the operation related to the drainage treatment of mixed water in the air cleaning unit 1011, respectively. The air purification control unit 1041 includes a computer system including a processor and a memory. The computer system functions as a control unit by executing the program stored in the memory by the processor. The program executed by the processor is recorded in advance in the memory of the computer system, but may be provided by being recorded in a nonvolatile recording medium such as a memory card, or may be provided by an electric communication line such as the internet. The air purification control unit 1041 corresponds to a "control unit" in the claims.

Fig. 7 is a block diagram showing a configuration of an air purification control unit 1041 of a space purification system 1100 according to embodiment 2. Specifically, as shown in fig. 7, the air purification control unit 1041 includes an input unit 1041a, a storage unit 1041b, a timer unit 1041c, a processing unit 1041d, and an output unit 1041e.

< action related to electrolytic treatment in electrolytic tank >

The air cleaning control unit 1041 performs the following process as an operation related to the electrolytic process in the electrolytic bath 1031.

The air purification control unit 1041 receives the water level information (water shortage signal) from the water level sensor 1039 and the time-related information (time information) from the timer unit 1041c as trigger factors of the electrolytic process in the electrolytic tank 1031, and outputs the received information to the processing unit 1041 d.

The processing unit 1041d determines control information based on the water level information from the water level sensor 1039, the time information from the timer unit 1041c, and the setting information from the storage unit 1041b, and outputs the control information to the output unit 1041e. Here, the setting information includes information about the start time or the end time of formation of hypochlorous acid water, information about the supply amount of tap water to be introduced into the electrolytic tank 1031, information about the amount of liquid containing chloride ions to be charged into the brine transfer pump 1035, information about the electrolysis conditions (time, current value, voltage, etc.) in the electrode 1032, information about the opening and closing timing of the electromagnetic valve 1033, and information about the opening/closing operation of the hypochlorous acid water transfer pump 1037.

Here, the electrolysis conditions in the electrode 1032 can be determined based on the amount of tap water in the electrolytic bath 1031, the chloride ion concentration, the electrolysis time, and the degree of degradation of the electrode 1032, and an algorithm can be created and set and stored in the storage unit 1041b.

The output unit 1041e outputs signals (control signals) to the respective devices (the brine transfer pump 1035, the solenoid valve 1033, and the hypochlorous acid water transfer pump 1037) based on the received control information.

More specifically, first, the brine transfer pump 1035 is kept stopped based on the signal from the output unit 1041e, and the hypochlorous acid water transfer pump 1037 is kept stopped based on the signal from the output unit 1041 e.

The solenoid valve 1033 is opened based on a signal from the output unit 1041 e. Thereby, supply of tap water from the tap water pipe to the electrolytic tank 1031 is started. Then, the solenoid valve 1033 is closed based on a signal from the output unit 1041e that receives the water level information (full water) from the water level sensor 1039. Thus, the electrolytic bath 1031 is supplied with tap water in a set supply amount.

Next, the brine transfer pump 1035 starts to operate based on a signal from the output unit 1041e, and transfers a liquid containing a predetermined amount of chloride ions to the electrolytic bath 1031 and stops. Thus, chloride ions are dissolved in tap water, and the electrolytic bath 1031 is in a state where an aqueous solution (chloride aqueous solution) containing a predetermined amount of chloride ions is produced.

Then, the electrode 1032 starts electrolysis of the aqueous chloride solution based on the signal from the output unit 1041e, and generates hypochlorous acid water under the set conditions and stops. The hypochlorous acid water generated by the electrode 1032 is, for example, in a state where the hypochlorous acid concentration is 100ppm to 150ppm (for example, 120 ppm) and the pH is 7.0 to 8.5 (for example, 8.0).

As described above, the air cleaning control unit 1041 performs electrolytic processing in the electrolytic bath 1031 to generate hypochlorous acid water in a predetermined concentration and amount.

< action related to supply treatment of hypochlorous acid Water to air purification section >

The air cleaning control unit 1041 performs the following processing as an operation related to the supply processing of hypochlorous acid water to the air cleaning unit 1011.

As a trigger of the hypochlorous acid water supply process to the air cleaning unit 1011, the timer unit 1041c measures the operation time of the humidifying motor 1011a, and the air cleaning control unit 1041 outputs a hypochlorous acid water supply request to the hypochlorous acid water generating unit 1030 (hypochlorous acid water supply unit 1036) every time a predetermined time (for example, 60 minutes) elapses. Here, the predetermined time is estimated by experimental evaluation in advance based on the fact that hypochlorous acid in hypochlorous acid water is gasified and decreases with time.

Specifically, the processing unit 1041d determines control information based on the time-related information (time information) from the timer unit 1041c and the setting information from the storage unit 1041b, and outputs the control information to the output unit 1041e. Here, the setting information includes information on the supply interval (for example, 60 minutes) of hypochlorous acid water and information on the on/off operation of the hypochlorous acid water transfer pump 1037.

The output unit 1041e outputs a signal (control signal) to the hypochlorous acid water transfer pump 1037 of the hypochlorous acid water supply unit 1036 based on the received control information.

The hypochlorous acid water transfer pump 1037 operates based on a signal from the output unit 1041e. Thus, the hypochlorous acid water generation unit 1030 starts the supply of hypochlorous acid water from the electrolytic tank 1031 to the air cleaning unit 1011 (mixing tank 1092). In order to ensure the concentration of hypochlorous acid water stored in the electrolytic tank 1031, when hypochlorous acid water is supplied from the hypochlorous acid water generating unit 1030 to the mixing tank 1092, the hypochlorous acid water generated in the electrolytic tank 1031 is supplied in full. Therefore, after the hypochlorous acid water is supplied, the electrolytic bath 1031 is empty, and the hypochlorous acid water is not produced from the state where the hypochlorous acid water remains in the electrolytic bath 1031. When the hypochlorous acid water in the electrolytic bath 1031 is supplied in full, the water level sensor 1039 outputs a water shortage signal as water level information.

Then, the hypochlorous acid water transfer pump 1037 is stopped based on a signal from the output unit 1041e that receives time-related information (for supplying a predetermined amount of desired time) from the timer unit 1041 c. Thus, the hypochlorous acid water generating unit 1030 supplies hypochlorous acid water from the electrolytic bath 1031 to the air purifying unit 1011 (mixing bath 1092) in a predetermined supply amount.

As described above, the air cleaning control unit 1041 performs the supply process of hypochlorous acid water from the hypochlorous acid water generating unit 1030 (the electrolytic tank 1031) to the air cleaning unit 1011. The control of the hypochlorous acid water supply by the hypochlorous acid water supply unit 1036 by the air cleaning control unit 1041 is set to "first control" every predetermined time.

< action related to supply treatment of Water to air purification section >

The air cleaning control unit 1041 performs the following processing as an operation related to the supply processing of water to the air cleaning unit 1011.

The air cleaning control unit 1041 receives water level information (water shortage signal) from the water level sensor 1090 of the space cleaning device 1010 as a trigger of the supply process of water to the air cleaning unit 1011, and outputs a water supply request to the water supply unit 1050.

Specifically, the input unit 1041a receives water level information (water shortage signal) from the water level sensor 1090 of the spatial light unit 1010, and outputs the received water level information to the processing unit 1041 d.

The processing unit 1041d determines control information based on the water level information (water shortage signal) from the input unit 1041a, the time-related information (time information) from the timer unit 1041c, and the setting information from the storage unit 1041b, and outputs the control information to the output unit 1041e. Here, the setting information includes information related to the opening/closing operation of the solenoid valve 1051 of the water supply unit 1050.

The output unit 1041e outputs a signal (control signal) to the solenoid valve 1051 based on the received control information.

The solenoid valve 1051 operates based on a signal from the output unit 1041e. As a result, the water supply unit 1050 starts the supply of water from the external water supply pipe to the air cleaning unit 1011 (mixing tank 1092) via the water supply pipe 1052.

Then, the solenoid valve 1051 is stopped based on a signal from the output unit 1041e that receives the water level information (full water signal) from the water level sensor 1090 of the spatial light unit 1010. Thus, the water supply unit 1050 supplies water from the external water supply pipe to the air cleaning unit 1011 (mixing tank 1092) until the amount reaches the set amount.

As described above, the air cleaning control unit 1041 performs the supply process of water from the water supply unit 1050 to the air cleaning unit 1011. The control of the water supply by the water supply unit 1050 by the air cleaning control unit 1041 based on the information (water shortage information) on the water level of the mixing tank 1092 from the water level sensor 1090 is referred to as "second control".

< action related to humidification purification treatment in air purification section >

Next, an operation related to the humidification purification process in the air purification section 1011 of the air purification control section 1041 will be described.

The input unit 1041a receives user input information from the operation device 1043, temperature and humidity information of the air in the indoor space 1018 from the temperature and humidity sensor 1044, and water level information of the hypochlorous acid water (mixed water) in the mixing tank 1092 from the water level sensor 1090. The input unit 1041a outputs the received information to the processing unit 1041d.

The operation device 1043 is a terminal for inputting user input information (for example, an air volume, a target temperature, a target humidity, the presence or absence of hypochlorous acid addition, a target supply amount level of hypochlorous acid, etc.) related to the space purification device 1010, and is communicably connected to the air purification control unit 1041 by wireless or wired connection.

The temperature and humidity sensor 1044 is a sensor that is provided in the indoor space 1018 and senses the temperature and humidity of the air in the indoor space 1018.

The storage unit 1041b stores the user input information received by the input unit 1041a and supply setting information in the supply operation of hypochlorous acid to the air flowing through the apparatus. The storage unit 1041b outputs the stored supply setting information to the processing unit 1041d. The supply setting information during the hypochlorous acid supply operation is also referred to as humidification setting information during the humidification purification operation of the air purification unit 1011.

The timer unit 1041c outputs time information about the current time to the processing unit 1041d.

The processing unit 1041d receives various information (user input information, temperature and humidity information, water level information) from the input unit 1041a, time information from the timer unit 1041c, and supply setting information from the storage unit 1041 b. The processing unit 1041d determines control information related to the humidification purification operation using the received user input information, time information, and supply setting information.

Specifically, the processing unit 1041d determines the humidification demand for the indoor space 1018 based on the humidity difference between the target humidity stored in the storage unit 1041b and the temperature and humidity information of the air in the indoor space 1018 from the temperature and humidity sensor 1044 at regular intervals based on the time information from the timer unit 1041 c.

The processing unit 1041d determines control information related to the humidification purification operation based on the determined humidification demand and the supply setting information stored in the storage unit 1041 b. The processing unit 1041d outputs the specified control information to the output unit 1041e.

When the water level information from the water level sensor 1090 includes information (water shortage signal) indicating the water level of the hypochlorous acid water (mixed water) in the mixing tank 1092, the processing unit 1041d outputs a signal indicating a water supply request to the water supply unit 1050 to the output unit 1041e. Further, the processing unit 1041d outputs a hypochlorous acid water supply request signal to the hypochlorous acid water generating unit 1030 to the output unit 1041e when the operation time of the air purifying unit 1011 (the humidification motor 1011 a) is a predetermined time (for example, 60 minutes) based on the time information from the time counting unit 1041 c. In the present embodiment, the water level indicating that hypochlorous acid water (mixed water) in the mixing tank 1092 is deficient is set to a water level at which the hypochlorous acid water (mixed water) in the mixing tank 1092 is reduced from a state of being full of water to a state of about 1/3.

The output unit 1041e outputs the received signals to the air cleaning unit 1011, the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036), and the water supplying unit 1050, respectively.

The air cleaner 1011 receives the signal from the output unit 1041e, and executes control of the operation based on the received signal. At this time, the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036) receives the signal (hypochlorous acid water supply request signal) from the output unit 1041e, and based on the received signal, performs the operation (first control) related to the supply process of hypochlorous acid water to the air cleaning unit 1011. The water supply unit 1050 receives a signal (a signal of a water supply request) from the output unit 1041e, and executes the operation (second control) related to the supply process of water to the air cleaning unit 1011 based on the received signal.

As described above, the air purification control unit 1041 performs, as the supply process, the first control of the supply of hypochlorous acid water by the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036) and the second control of the supply of water by the water supplying unit 1050 based on the information (water shortage information) on the water level of the mixing tank 1092 from the water level sensor 1090 at predetermined intervals, and stores the mixed water in the mixing tank 1092. When hypochlorous acid water and water are supplied to the mixing tank 1092 and mixed water is stored, the air cleaning control unit 1041 performs humidification and cleaning processes on air flowing through the space cleaning device 1010 (air cleaning unit 1011) by making the hypochlorous acid water supply cycle (every predetermined time) and the water supply cycle (every time water shortage detection) different from each other.

< action related to drainage treatment of Mixed Water of air purification portion >

The air cleaning control unit 1041 performs the following processing as an operation related to the drainage processing of the mixed water stored in the mixing tank 1092 of the air cleaning unit 1011.

The air purification control unit 1041 determines whether or not the drainage process is performed based on the information on the number of times the first control is performed in the hypochlorous acid water supply unit 1036 and the information on the number of times the second control is performed in the water supply unit 1050 as a trigger for the drainage process of the mixed water stored in the mixing tank 1092. The information on the number of times each control is executed also includes information on the timing at which each control is executed.

Specifically, the storage unit 1041b stores the number of times the first control is executed in the hypochlorous acid water supply unit 1036 and the number of times the second control is executed by the water supply unit 1050. Here, the number of execution times is the number of times of each control executed after the start of the humidification/purification process operation (hereinafter, also referred to as "after the start of the operation") starting from the initial state of the mixing tank 1092 (for example, the state in which the mixing tank 1092 is full of water by the supply of water and the supply of hypochlorous acid water after the drainage process).

The processing unit 1041d determines the number of times the first control is continuously executed (the number of times the first control is continuously executed) based on the information on the number of times the first control is executed and the information on the number of times the second control is executed, and determines whether or not the number of times the first control is continuously executed is the reference number of times.

Here, the reference number of times is set to "5 times" based on the hypochlorous acid concentration of the hypochlorous acid water supplied from the hypochlorous acid water supply unit 1036 so that the hypochlorous acid water concentration in the mixing tank 1092 does not exceed the reference concentration by only the continuous hypochlorous acid water supply based on the first control. The reference concentration is set to a hypochlorous acid concentration at which the user in the indoor space 1018 does not become too fast due to odor or the like of the air 1009 (the air 1009 containing hypochlorous acid) discharged to the indoor space 1018.

When the number of times of continuous execution of the first control is the reference number as a result of the determination, the processing unit 1041d determines control information based on the time-related information (time information) from the timer unit 1041c and the setting information from the storage unit 1041b, and outputs the control information to the output unit 1041e. Here, the setting information includes information related to the opening/closing operation of the solenoid valve 1061 of the drain 1060.

The output unit 1041e outputs a signal (control signal) to the solenoid valve 1061 based on the received control information.

The solenoid valve 1061 operates based on a signal from the output unit 1041 e. As a result, the drain portion 1060 starts to discharge the mixed water from the mixing tank 1092 to the external drain pipe via the water pipe 1062.

Then, the solenoid valve 1061 is stopped after a predetermined time (for example, 1 minute) elapses based on a signal from the output unit 1041e that receives the time information from the timer unit 1041 c. Thus, all the mixed water stored in the mixing tank 1092 is discharged to be empty.

As described above, the air purification control unit 1041 performs the water discharge process of the mixed water from the mixing tank 1092 to the outside. The control of the mixed water discharge by the water discharge unit 1060 by the air purification control unit 1041 based on the information on the number of times of continuous execution of the first control by the hypochlorous acid water supply unit 1036 is referred to as "third control".

Here, the third control is preferably performed immediately before the first control by the hypochlorous acid water supply unit 1036 is performed. Thus, for example, immediately after the new hypochlorous acid water is supplied to the mixing tank 1092 by the first control, the water is not discharged by the third control, so that the mixed water stored in the mixing tank 1092 can be used continuously for the maximum extent, and waste caused by the water discharged by the third control can be reduced. In the following examples, the first control is performed immediately before the execution of the first control from the viewpoint of reducing the waste of hypochlorous acid water as an active ingredient of the sterilization.

Next, with reference to fig. 8 and 9, in the space purification system 1100, the mixed water (mixed water obtained by performing the first control or the second control) in the mixing tank 1092 of the space purification device 1010 (air purification unit 1011) will be described. Fig. 8 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration in the space purification system 1100 (winter: first example). In more detail, fig. 8 (a) shows the change with time of the amount of hypochlorous acid water (mixed water) in the mixing tank 1092. Fig. 8 (b) shows a change with time in the concentration of hypochlorous acid water (mixed water) in the mixing tank 1092. Fig. 8 (c) shows the change with time of the concentration of hypochlorous acid contained in the air of the ejection port 1003. Fig. 9 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration (summer: second example) in the space purification system 1100. In more detail, fig. 9 (a) shows the change with time of the amount of hypochlorous acid water (mixed water) in the mixing tank 1092. Fig. 9 (b) shows a change with time in the concentration of hypochlorous acid water (mixed water) in the mixing tank 1092. Fig. 9 (c) shows the change with time of the concentration of hypochlorous acid contained in the air of the ejection port 1003.

Here, the hypochlorous acid water is supplied to the mixing tank 1092 at predetermined intervals (1 hour), and the water is supplied to the mixing tank 1092 every time the water level sensor 1090 detects that the mixing tank 1092 is a water level where water is absent. Further, the drainage process is performed based on a result of determination of the number of consecutive executions of the first control, which is performed immediately before the first control is executed. In more detail, the water discharge processing is performed based on whether or not the number of consecutive executions of the first control in the water discharge judgment performed immediately before the timing of the supply of hypochlorous acid water is the reference number (5 times).

As described above, even if hypochlorous acid water (mixed water) in the mixing tank 1092 becomes a water-deficient water level, about 1/3 remains in the mixing tank 1092 when the hypochlorous acid water (mixed water) is full of water. In order to simplify the description, the air purifier 1011 operates at a constant humidification request amount during the humidification purification operation. In the following, the predetermined amount of hypochlorous acid water supplied to the mixing tank 1092 is also referred to as "hypochlorous acid water stock solution".

First, the operation status in winter in japan will be described. In addition, in winter in japan, since the outside air is dried, the amount of humidification required for the air cleaning unit 1011 is large, and the water supply is performed at intervals shorter than the hypochlorous acid water supply. That is, the water level in the mixing tank 1092 becomes deficient before the timing of the hypochlorous acid water supply.

Therefore, in the following, as a first example, the process under the humidification/purification conditions in which the supply of water 4 times (second control) and the supply of hypochlorous acid water 3 times (first control) are performed is described as being performed until the operation time 3 hours after the start of the operation of the air cleaning unit 1011.

The humidification purification conditions described above are conditions set when the number of times the first control is performed is smaller than the number of times the second control is performed by controlling the air purification unit 1011 when the humidification demand for the air purification unit 1011 is equal to or greater than the first reference value. Here, the first reference value is a value set for distinguishing a state where the humidity of the air in winter in japan is low and is dry from a state where the humidity of the air in summer in japan is high and is wet.

In the first example, as shown in fig. 8 a, when the operation start is set to 0 hours, the supply of hypochlorous acid water to the mixing tank 1092 (first control) is performed at timings of 1 hour, 2 hours, and 3 hours … …. On the other hand, the supply of water to the mixing tank 1092 (second control) is performed at timings of a1 hour, b1 hour, c1 hour, and d1 hour … …. At the time point of 0 hour from the start of the operation, hypochlorous acid water and water are supplied to the mixing tank 1092, and the mixing tank 1092 is filled with hypochlorous acid water (mixed water) having a predetermined concentration (initial state).

Further, at the timing of 3 hours, since the supply of hypochlorous acid water (first control) overlaps with the supply of water (second control), the first example can be regarded as the supply of hypochlorous acid water (first control) and the supply of water (second control) based on the 3-hour cycle. However, in this timing water supply (second control), in addition to about 1/3 of the total amount of water remaining in the mixing tank 1092 relative to the mixed water, the amount of water supplied is reduced by a component corresponding to the amount of hypochlorous acid water supplied, and therefore the hypochlorous acid water concentration in the mixing tank 1092 is slightly higher than the initial state at the time of 0 hours.

In the first example, the hypochlorous acid water is supplied 4 times with respect to the water supply and 3 times during a period from 3 hours of operation time (period from more than 0 hours to 3 hours or less of operation time) until the operation of the air cleaning unit 1011 is started. Then, the 3 rd hour of the operation time was regarded as an initial state (0 hour), and the same supply operation was repeated every 3 hours of the operation time.

That is, the first example may be referred to as that when the humidification request amount for the air cleaning portion 1011 is equal to or greater than the first reference value, the first control is controlled such that the number of times the first control is performed is smaller than the number of times the second control is performed.

The water discharge determination of the mixed water stored in the mixing tank 1092 is performed immediately before the first control is executed at the timings of 1 hour, 2 hours, and 3 hours … …. In addition, in winter in japan, the supply of water (second control) is performed at shorter intervals than the supply of hypochlorous acid water (first control) with respect to a larger humidification request amount of the air cleaning unit 1011. Therefore, the first control is not continuously performed, and the third control is not performed to drain the mixed water.

This will be described in more detail.

Referring to fig. 8 (a), description will be given focusing on the change with time of the water level of hypochlorous acid water (mixed water) in the mixing tank 1092.

At the beginning of the operation (0 hours), the mixing tank 1092 is filled with mixed water of hypochlorous acid stock solution and water (also referred to as hypochlorous acid water) until it is full of water. Then, in the humidification purification operation, the amount of the mixed water is reduced at a constant rate, and at the time of a1 hour from the start of the operation, a water shortage is detected, and water is supplied from the water supply unit 1050 until the mixing tank 1092 becomes full. Then, due to the humidification purification operation, the water level of the mixed water is reduced at a constant rate, and the supply timing of the hypochlorous acid water is 1 hour, and the water discharge judgment of the mixed water is performed at the timing of 1 hour. In the humidification purification operation up to this point, the number of times of continuous supply of the hypochlorous acid aqueous stock solution by the first control after the supply of the water by the second control was 0 times, and it was determined that the number of times of continuous execution of the first control did not reach the reference number of times (5 times). In addition, if the supply of water including the second control or the water discharge processing including the third control is performed, the number of times of continuous execution of the first control is reset.

Then, upon receiving the determination result, the first control is performed without performing the drainage of the mixed water stored in the mixing tank 1092, and the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036) to the mixing tank 1092. Thus, the water level in the mixing tank 1092 slightly rises. And, the number of consecutive executions of the first control is 1. Then, also in the humidification purification operation, the water level of the mixed water decreases, and the water becomes deficient again at the timing b1 hour from the start of the operation, and water is supplied from the water supply unit 1050 until the mixing tank 1092 becomes full. And, the number of consecutive executions of the first control is reset to 0 times.

Then, at the timing when the operation time after the start of the operation becomes 2 hours, the water discharge judgment is performed. In the humidification purification operation up to this point, the number of times of continuous supply of the hypochlorous acid aqueous stock solution by the first control after the supply of the water by the second control was 0 times, and it was determined that the number of times of continuous execution of the first control did not reach the reference number of times (5 times).

Then, upon receiving the determination result, the first control is performed without performing the drainage of the mixed water stored in the mixing tank 1092, and the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036) to the mixing tank 1092. Thus, the water level in the mixing tank 1092 slightly rises. Further, the number of consecutive executions of the first control becomes 1. After that, also in the humidification purification operation, the water level of the mixed water decreases, and the water becomes deficient again at the timing of c1 hour from the start of the operation, and water is supplied from the water supply unit 1050 until the mixing tank 1092 becomes full. And, the number of consecutive executions of the first control is reset to 0 times.

Then, at the timing when the operation time after the start of the operation is 3 hours (d 1 hour), the water discharge judgment is performed. In the humidification purification operation up to this point, the number of times of continuous supply of the hypochlorous acid aqueous stock solution by the first control after the supply of the water by the second control was 0 times, and it was determined that the number of times of continuous execution of the first control did not reach the reference number of times (5 times).

At this timing, the timing of supplying the water shortage and the hypochlorous acid water stock solution is overlapped, and therefore, the determination result is received, and the first control and the second control are sequentially executed without executing the drainage of the mixed water stored in the mixing tank 1092. More specifically, as the first control, first, hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036) to the mixing tank 1092. Then, as the second control, water is supplied from the water supply unit 1050 until the mixing tank 1092 becomes full of water. Accordingly, the hypochlorous acid aqueous stock solution and water are supplied to the mixing tank 1092, respectively, and the water level in the mixing tank 1092 is set to be close to the initial state (0 hours) of operation. In addition, since the supply of water is performed, the number of consecutive executions of the first control is reset to 0.

Then, similarly to the period from the start of the operation to the 3 hours of the operation time, water was supplied at the timing of the water shortage and the hypochlorous acid water stock solution was supplied at the timing of the hypochlorous acid water supply.

Next, referring to fig. 8 b, a description will be given focusing on a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 1092.

At the beginning of the operation (0 hours), mixing is performed in the mixing tank 1092 so that the mixed water of the hypochlorous acid aqueous stock solution and water becomes a predetermined concentration (initial concentration). When the humidification purification operation is started, the concentration of hypochlorous acid water (mixed water) in the mixing tank 1092 decreases with the passage of time from the start of the operation to a1 hour. This is because hypochlorous acid has a higher vapor pressure than water, and thus hypochlorous acid is vaporized at a constant ratio relative to the concentration of hypochlorous acid water and supplied to the air. In addition, since hypochlorous acid contained in the water is consumed together with the water miniaturized by the air purification unit 1011 when hypochlorous acid is not gasified, the concentration of hypochlorous acid water in the mixing tank 1092 does not change although the hypochlorous acid water decreases at a constant rate according to the amount of humidification. Further, even when the water level sensor 1090 detects the water shortage, that is, a1 hour, the concentration of hypochlorous acid water is not zero, because hypochlorous acid water (mixed water) remains in the mixing tank 1092 even when the water shortage is detected as described above.

When a1 hour (water shortage detection) is reached from the start of the operation, the hypochlorous acid water in the mixing tank 1092 is diluted with water by the supply of water from the water supply unit 1050, and therefore the concentration of hypochlorous acid water in the mixing tank 1092 is reduced. Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by gasification of hypochlorous acid until 1 hour, which is the timing of supply of hypochlorous acid water.

When the hypochlorous acid water is supplied for 1 hour from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 1092 increases to the initial concentration or higher along with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036). This is because a predetermined amount of hypochlorous acid water (hypochlorous acid water stock solution) supplied at the start of operation is supplied to mixed water (water in a state including hypochlorous acid) of a smaller amount than the water supplied at the start of operation (0 hours). Then, until b1 hour from the start of operation (water shortage detection), the concentration of hypochlorous acid water (mixed water) decreases due to vaporization of hypochlorous acid. The reduction rate of hypochlorous acid is faster than the initial operation because the amount of hypochlorous acid gasified increases in accordance with the amount of hypochlorous acid contained in the mixed water.

When the time is b1 hour from the start of operation (water shortage detection), the hypochlorous acid water in the mixing tank 1092 is diluted with water by the supply of water from the water supply unit 1050, and thus the concentration of hypochlorous acid water in the mixing tank 1092 is reduced. Then, the concentration of hypochlorous acid water (mixed water) was slightly reduced by vaporization of hypochlorous acid until the supply of hypochlorous acid water was timed, that is, 2 hours.

When the hypochlorous acid water is supplied for 2 hours from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 1092 increases to the initial concentration or higher along with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036). Then, from the start of the operation to c1 hour (water shortage detection), the concentration of hypochlorous acid water (mixed water) decreases due to vaporization of hypochlorous acid.

If the time c1 hour from the start of operation (water shortage detection) is reached, the hypochlorous acid water in the mixing tank 1092 is diluted with water as the water from the water supply unit 1050 is supplied, and thus the concentration of the hypochlorous acid water in the mixing tank 1092 is reduced. Then, until 3 hours, which is the timing of supply of hypochlorous acid water, the concentration of hypochlorous acid water (mixed water) was slightly reduced by gasification of hypochlorous acid.

When water (and hypochlorous acid water) is supplied for 3 hours (d 1 hour) from the start of the operation, water and hypochlorous acid water stock solution are supplied to the mixing tank 1092, respectively, and the concentration of hypochlorous acid water in the mixing tank 1092 is close to the initial operation (0 hour). Then, as in the above, the concentration change of hypochlorous acid water (mixed water) is repeated.

Next, referring to fig. 8 (c), a description will be given focusing on the change with time of the concentration of hypochlorous acid contained in the air 1009 of the discharge port 1003.

The concentration of hypochlorous acid contained in the air 1009 discharged from the discharge port 1003 is determined based on the humidification amount in the air cleaning portion 1011 and the concentration of hypochlorous acid water in the mixing tank 1092, but in the first example, the humidification amount is constant, and thus the concentration of hypochlorous acid water in the mixing tank 1092 is reflected. Accordingly, as shown in fig. 8 (c), the concentration of hypochlorous acid contained in the air 1009 of the discharge port 1003 increases and decreases in accordance with the increase and decrease in the concentration of hypochlorous acid water in the mixing tank 1092 shown in fig. 8 (b).

Here, as in the prior art, when the hypochlorous acid water stock solution and water are supplied to the water level sensor 1090 and the water is full, the timing from the start of the operation (0 hours) to the state of a1 hour up to 3 hours (d 1 hours) is repeated. In this case, the average concentration of hypochlorous acid contained in the air 1009 of the discharge port 1003 is, for example, as in the conventional average concentration shown in fig. 8 (c). In contrast, in the first example, the state was the same as the conventional state from the start of operation (0 hours) to a1 hour, but the state was different from the conventional state in the period from a1 hour to 3 hours. More specifically, in the period from a1 hour to 3 hours, as shown in fig. 8 (b), the period in which the concentration of hypochlorous acid water is higher than the initial concentration (a part of the period from 1 hour to b1 hour, the period from 2 hours to c1 hour) is shorter than the period in which the concentration is smaller than the initial concentration (the period from a1 hour to 1 hour, the period from b1 hour to 2 hours, and the period from c1 hour to 3 hours). Therefore, the average concentration of hypochlorous acid contained in the air 1009 of the discharge port 1003 becomes lower than the conventional average concentration in the period from the start of operation (0 hour) to 3 hours.

As described above, when the hypochlorous acid water and water are supplied to the mixing tank 1092 and the mixed water is stored, the concentration of hypochlorous acid contained in the air 1009 of the discharge port 1003, that is, the air discharged to the indoor space 1018 can be reduced as compared with the case where the hypochlorous acid water and water are supplied to the mixing tank 1092 in the conventional method by making the supply cycle of hypochlorous acid water (every predetermined time) different from the supply cycle of water (every water shortage detection).

Next, the operation state in summer in japan will be described. In addition, in summer in japan, the outside air is moist and wet, so that the amount of humidification required for the air cleaning portion 1011 is small, and water is supplied at intervals longer than that of hypochlorous acid water. That is, the supply of hypochlorous acid water (first control) has been performed several times until the supply of water (second control) is performed.

Therefore, as a second example, a description will be given of a process under humidification purification conditions in which the supply of hypochlorous acid water (first control) is performed every time the mixed water corresponding to the supply amount of hypochlorous acid water stock solution is consumed during the operation time of 1 hour. That is, in the second example, the supply of hypochlorous acid water (first control) is continuously performed, and the supply of water accompanied by the water shortage detection (second control) is not performed.

In the second example, as shown in fig. 9 (a), when the operation start is set to 0 hours with respect to the supply of the hypochlorous acid aqueous stock solution to the mixing tank 1092 (first control), the supply of the hypochlorous acid aqueous stock solution to the mixing tank 1092 (first control) is performed at timings of 1 hour, 2 hours, and 3 hours … …. On the other hand, since the consumption amount accompanying humidification purification is equal to the amount of hypochlorous acid water supplied by the first control, the supply of water to the mixing tank 1092 (second control) is not performed without performing the water shortage detection by the water level sensor 1090. At the time point of 0 hour from the start of the operation, hypochlorous acid water and water are supplied to the mixing tank 1092, and the mixing tank 1092 is filled with hypochlorous acid water (mixed water) having a predetermined concentration (initial state).

The water discharge determination of the mixed water stored in the mixing tank 1092 is performed immediately before the first control is executed at the timings of 1 hour, 2 hours, and 3 hours … ….

Specifically, at the timing when the operation time after the start of the next operation is 1 hour, the number of times of supply of the hypochlorous acid aqueous stock solution by the first control is 0, and it is determined that the number of times of continuous execution of the first control does not reach the reference number of times (5 times). Then, the first control is executed in response to the determination result, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 1092.

Next, the running time after the start of the operation was set to a timing of 2 hours, -the drainage judgment of the row-mixed water. In the humidification purification operation up to this point, the number of times the first control was supplied to the hypochlorous acid aqueous stock solution was 1, and it was determined that the number of times the first control was executed did not reach the reference number (5 times). Then, the first control is executed in response to the determination result, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 1092.

Then, the same control was performed at a timing until the operation time after the start of the operation was 5 hours.

Next, at the timing when the operation time after the start of the operation comes to 6 hours, the water discharge judgment of the mixed water is performed. In the humidification purification operation up to this point, the number of continuous supplies of the hypochlorous acid aqueous stock solution by the first control was 5, and it was determined that the number of execution times of the first control was the reference number (5 times). Then, the third control is executed in response to the determination result, and the mixed water in the mixing tank 1092 is completely discharged. Further, after the third control is executed, the supply of the hypochlorous acid water stock solution and the supply of the water are re-executed to the mixing tank 1092, and the mixing tank 1092 is in a state of being full of water due to the hypochlorous acid water (mixed water) of a predetermined concentration as in the initial state.

Then, the same supply operation and drain operation were repeated every 6 hours, taking the timing of 6 hours as the initial state (0 hours).

This will be described in more detail.

First, referring to fig. 9 (a), description will be made focusing on the change with time of the water level of hypochlorous acid water (mixed water) in the mixing tank 1092.

At the beginning of the operation (0 hours), the mixing tank 1092 is filled with mixed water of hypochlorous acid stock solution and water (also referred to as hypochlorous acid water) until it is full of water. In addition, the amount of the mixed water was reduced at a constant rate by the humidification purification operation, and the supply timing of hypochlorous acid water was 1 hour. Then, at this 1 hour timing, the water discharge judgment of the mixed water was performed.

In the humidification purification operation up to this point, the supply of the second control to the water and the supply of the first control to the hypochlorous acid aqueous stock solution were not performed, and therefore, the number of times of continuous supply of the first control to the hypochlorous acid aqueous stock solution was 0 times, and it was determined that the number of times of continuous execution of the first control did not reach the reference number (5 times). Then, upon receiving the determination result, the first control is performed without performing the drainage of the mixed water stored in the mixing tank 1092, and the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036) to the mixing tank 1092. Thereby, the water level in the mixing tank 1092 rises to a full state. Then, the water level of the mixed water was reduced by the humidification purification operation, and the supply timing of the hypochlorous acid water was 2 hours. Then, the water discharge judgment of the mixed water was performed at the timing of 2 hours.

In the humidification purification operation up to this point, since the number of continuous supplies of the hypochlorous acid aqueous stock solution by the first control was 1, it was determined that the number of execution times of the first control did not reach the reference number (5 times). Then, upon receiving the determination result, the first control is performed without performing the drainage of the mixed water stored in the mixing tank 1092, and the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supply unit 1036) to the mixing tank 1092. Thereby, the water level in the mixing tank 1092 rises to a full state. In this way, in the second example, the amount of mixed water is reduced at a constant rate in the humidification purification operation, but the hypochlorous acid aqueous stock solution is supplied in the amount to be consumed, and therefore the amount of mixed water is increased or decreased only between the state where the amount of consumption is reduced and the full water state.

Then, the mixed water was discharged at 6 hours, which is the timing of supplying the aqueous stock solution of hypochlorous acid.

In the humidification purification operation up to this point, the number of times the first control is supplied to the hypochlorous acid aqueous stock solution is 5 times, and therefore it is determined that the number of times the first control is executed reaches the reference number of times (5 times). Then, the third control is executed in response to the determination result, and the mixed water in the mixing tank 1092 is drained. Further, after the third control is performed to drain the mixed water, the supply of the hypochlorous acid water stock solution and the supply of water are re-performed to the mixing tank 1092, and the mixing tank 1092 is in a state of being full of water due to the hypochlorous acid water (mixed water) of a predetermined concentration, as in the initial state (0 hours). Here, the number of consecutive executions of the first control is reset, and the storage of the number of executions of the first control is started again.

Then, the same supply operation and drain operation were repeated every 6 hours, taking the timing of 6 hours as the initial state (0 hours). In more detail, as in the above, the first control is repeated at the timing of the supply of hypochlorous acid water to supply the hypochlorous acid water stock solution. And, the water discharge judgment of the mixed water by the third control is performed immediately before the first control is performed, and the third control is performed in the case where the condition is satisfied. The water level of the hypochlorous acid water (mixed water) in the mixing tank 1092 increases or decreases according to each operation.

Next, referring to fig. 9 b, a description will be given focusing on a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 1092.

At the beginning of the operation (0 hours), mixing is performed in the mixing tank 1092 so that the mixed water of the hypochlorous acid aqueous stock solution and water becomes a predetermined concentration (initial concentration). When the humidification purification operation is started, the concentration of hypochlorous acid water (mixed water) in the mixing tank 1092 decreases with the lapse of time from the start of the operation to 1 hour. This is because, as described above, hypochlorous acid has a higher vapor pressure than water, and thus hypochlorous acid is vaporized at a certain ratio to the concentration of hypochlorous acid water and supplied to the air.

When the hypochlorous acid water is supplied for 1 hour from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 1092 increases to the initial concentration or higher with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036). This is because, as described above, a predetermined amount of hypochlorous acid water (hypochlorous acid water stock solution) supplied at the start of operation is supplied to mixed water (water in a state including hypochlorous acid) having a smaller water amount than the mixed water stored at the start of operation (0 hours). Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by vaporization of hypochlorous acid 2 hours from the start of operation.

When the hypochlorous acid water is supplied for 2 hours from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 1092 further increases to the initial concentration or higher with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 1030 (hypochlorous acid water supplying unit 1036). Then, 3 hours from the start of the operation, the concentration of hypochlorous acid water (mixed water) was decreased by the vaporization of hypochlorous acid. The concentration change of hypochlorous acid water (mixed water) was repeated as much as the time of 5 hours thereafter, and the concentration of hypochlorous acid water (mixed water) was gradually increased.

When the supply timing of the hypochlorous acid aqueous stock solution is 6 hours from the start of the operation, the drainage timing is set based on the drainage judgment, and therefore, after all of the hypochlorous acid aqueous solution (mixed water) in the mixing tank 1092 is drained, water and the hypochlorous acid aqueous stock solution are supplied to the mixing tank 1092, respectively, and the concentration of the hypochlorous acid aqueous solution in the mixing tank 1092 is in the same state as that in the initial operation (0 hours). Then, the change in the concentration of hypochlorous acid water (mixed water) was repeated as before.

Next, referring to fig. 9 (c), a description will be given focusing on the change with time of the concentration of hypochlorous acid contained in the air 1009 of the discharge port 1003.

Since the concentration of hypochlorous acid contained in the air 1009 discharged from the discharge port 1003 is determined based on the humidification amount in the air cleaning unit 1011 and the concentration of hypochlorous acid water in the mixing tank 1092, as in winter in japan, the concentration of hypochlorous acid contained in the air 1009 discharged from the discharge port 1003 increases or decreases in accordance with the increase or decrease in the concentration of hypochlorous acid water in the mixing tank 1092 shown in fig. 9 (b), as shown in fig. 9 (c).

Here, as in the prior art, when the hypochlorous acid aqueous stock solution and water are supplied to the water level sensor 1090 and the water is full, the concentration of hypochlorous acid water is continuously reduced from the start of operation (0 hours) to 6 hours. Strictly speaking, the concentration of hypochlorous acid water continuously decreases from the full water state to the time when the lack of water is detected within 6 hours. In this case, the average concentration of hypochlorous acid contained in the air 1009 of the discharge port 1003 is, for example, as in the conventional average concentration shown in fig. 9 (c).

In contrast, in the second example, the state was the same as the conventional state from the start of operation (0 hours) to 1 hour, but the state was different from the conventional state in the period from 1 hour to 6 hours. More specifically, as shown in fig. 9 (b), the period from 1 hour to 6 hours is longer than the period in which the concentration of hypochlorous acid water is higher than the initial concentration, and longer than the period in which the concentration is lower than the initial concentration. Therefore, the average concentration of hypochlorous acid contained in the air 1009 of the discharge port 1003 is higher than the conventional average concentration in the period from the start of operation (0 hour) to 6 hours.

Further, since the concentration of the mixed water is changed repeatedly every 6 hours for 6 hours as 1 cycle after 6 hours, the concentration of hypochlorous acid water does not continuously rise, and the concentration of hypochlorous acid water can be continuously adjusted within a range of a certain concentration or less. That is, if the humidification purification operation is continued, the concentration of hypochlorous acid water in the mixing tank 1092 may excessively rise, but by providing control of the water discharge judgment that matches the number of continuous supply of the hypochlorous acid water stock solution by the first control, the concentration of hypochlorous acid water in the mixing tank 1092 can be reset at a constant interval, and further the additional amount of hypochlorous acid contained in the air 1009 of the discharge port 1003 can be reset, and the supply amount of hypochlorous acid gas to the indoor space 1018 can be controlled.

As described above, in the space purification system 1100, hypochlorous acid water is supplied into the mixing tank 1092 at intervals of a predetermined time (for example, 1 hour) as the first control, the water supply process is performed based on the water level information (water shortage signal) from the water level sensor 1090 as the second control, and the mixed water in the mixing tank 1092 is discharged based on the number of continuous executions of the first control as the third control. Further, the air purification control unit 1041 of the space purification system 1100 makes the number of times the first control is performed in the predetermined period different from the number of times the second control is performed in the predetermined period, based on the humidification request amount (the humidification request amount corresponding to winter in japan or the humidification request amount corresponding to summer in japan) requested to the air purification unit 1011. Thus, in a state where the humidification demand is high as in winter in japan, the air 1009 in a state where the hypochlorous acid amount is small can be released into the indoor space 1018 as compared with the conventional method, and in a state where the humidification demand is low as in summer in japan, the air 1009 in a state where the hypochlorous acid amount is large can be released into the indoor space 1018 as compared with the conventional method. Further, when the humidification purification operation is continued for a long period of time, an excessive increase in the hypochlorous acid concentration released to the indoor space 1018 can be suppressed.

That is, by operating the supply of hypochlorous acid water, the supply of water, and the drainage of mixed water by the respective trigger factors, the concentration of hypochlorous acid water in the mixing tank 1092 (the concentration of hypochlorous acid contained in the air 1009 discharged to the indoor space 1018) can be adjusted by simple control (first control, second control, third control).

As described above, according to the space purification system 1100 according to embodiment 2, the following effects can be obtained.

(1) The space purification system 1100 includes: a hypochlorous acid water generation unit 1030 for generating hypochlorous acid water; a hypochlorous acid water supply unit 1036 for supplying hypochlorous acid water from the hypochlorous acid water generation unit 1030 to the mixing tank 1092; a water supply unit 1050 for supplying water to the mixing tank 1092; a water level sensor 1090 for detecting the water level of the mixing tank 1092; an air purifying unit 1011 for miniaturizing the mixed water of hypochlorous acid water and water stored in the mixing tank 1092 and releasing the same into the air; and an air purification control unit 1041 for controlling the supply process of the hypochlorous acid water supply unit 1036 and the water supply unit 1050, and the discharge process of the mixed water stored in the mixing tank 1092. The air purification control unit 1041 performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit 1036 at predetermined intervals (for example, 60 minutes), a second control of supplying water by the water supply unit 1050 based on information (water shortage information) on the water level of the mixing tank 1092 from the water level sensor 1090, and a third control of draining mixed water stored in the mixing tank 1092 when the first control is continuously performed a predetermined number of times.

Accordingly, when the air having a relatively high humidity is ventilated as in summer in japan, the consumption of the mixed water stored in the mixing tank 1092 is small, and therefore, the frequency of supply of hypochlorous acid water to the mixing tank 1092 (the number of times of performing the first control) increases, and the mixed water is pulverized and released into the air in a state where the hypochlorous acid concentration of the mixed water in the mixing tank 1092 is high. At this time, when the first control is continuously performed a predetermined number of times (for example, 5 times), the third control is performed to discharge the mixed water stored in the mixing tank 1092 and reset the mixed water in the mixing tank 1092, whereby an excessive increase in the hypochlorous acid concentration in the mixing tank 1092 can be suppressed. As a result, even in a case where the hypochlorous acid water having been micronized is difficult to gasify, hypochlorous acid having a predetermined concentration can be contained in the air and released into the indoor space 1018.

On the other hand, when air having a relatively low humidity is ventilated as in winter in japan, the consumption of the mixed water stored in the mixing tank 1092 increases, and therefore the frequency of supply of water to the mixing tank 1092 (the number of times of performing the second control) increases, and the mixed water is pulverized and released into the air in a state where the hypochlorous acid concentration of the mixed water in the mixing tank 1092 is low. As a result, even in a case where the hypochlorous acid water having been pulverized is easily gasified, hypochlorous acid having a concentration as low as a predetermined concentration can be contained in the air and released into the indoor space 1018.

That is, in the space purification system 1100, the amount of hypochlorous acid released into the air can be easily adjusted.

(2) In the space purification system 1100, the air purification control unit 1041 executes the third control immediately before the first control is executed after the first control is executed a predetermined number of times in succession. In this way, in the space purification system 1100, since the third control is not performed immediately after hypochlorous acid is supplied to the mixing tank 1092 by the first control, the hypochlorous acid water supplied by the first control can be used continuously for the maximum extent, and waste caused by the draining in the third control can be reduced.

In the space purification system 1100, even when the operation is performed for a long period of time (for example, 24 hours), the state in the mixing tank 1092 can be returned to the initial state of operation before the hypochlorous acid water concentration in the mixing tank 1092 becomes excessively high. That is, the space purification system 1100 can easily adjust the amount of hypochlorous acid released into the air.

(3) In the space purification system 1100, the air purification control unit 1041 performs control such that the number of times the first control is performed is smaller than the number of times the second control is performed when the humidification demand amount requested by the air purification unit 1011 is equal to or greater than the first reference value during the supply process, and performs control such that the number of times the first control is performed is greater than the number of times the second control is performed when the humidification demand amount is smaller than the first reference value. Thus, in the space purification system 1100, in the case where the humidification demand is smaller than the first reference value during the supply process, the mixed water can be pulverized and released into the air in a state where the hypochlorous acid concentration in the mixing tank 1092 is high. On the other hand, when the humidification demand is equal to or greater than the first reference value, the mixed water can be pulverized and released into the air in a state where the hypochlorous acid concentration in the mixing tank 1092 is low. That is, in the space purification system 1100, hypochlorous acid can be added to the air 1009 released from the air purification unit 1011 under conditions suitable for the environment of the indoor space 1018 based on the humidification demand.

The present disclosure is described above based on the embodiments. These embodiments are examples, and those skilled in the art will understand that various modifications can be made to each constituent element or combination of processing procedures, and that these modifications are also within the scope of the present disclosure.

In the first and second examples of the space purification system 1100 according to embodiment 2, the air purification unit 1011 is described as operating at a constant humidification request amount during the humidification purification operation time, but actually operates at a constant time interval with a humidification request amount determined based on the humidity difference between the target humidity and the humidity of the air in the indoor space 1018.

In the space purification system 1100 according to embodiment 2, the predetermined number of times in the third control is preferably set based on the concentration of hypochlorous acid water supplied by the first control. Thus, for example, in the space purification system 1100, when the concentration of hypochlorous acid water supplied by the first control is high, if the first control is continuously performed a predetermined number of times, the increase in the concentration of hypochlorous acid water in the mixing tank 1092 becomes fast, and therefore, by setting a predetermined number of times less, the excessive increase in the concentration of hypochlorous acid water in the mixing tank 1092 can be more reliably suppressed.

Embodiment 3

As a conventional space purification apparatus, an air conditioning system is known in which air supplied into a room is brought into contact with a gas-liquid contact member portion containing a purification component and released to sterilize the space (for example, refer to patent document 1).

In such a conventional space purification apparatus, in general, in addition to the release of the water to be miniaturized, water stored in the apparatus (water containing a purification component) is gasified in accordance with the operation of the miniaturization, and the water containing a part of the purification component and the purification component are released into the space.

However, in the conventional space purification apparatus, in a case where the amount of humidification required for the indoor space is small, for example, in summer (particularly, in a rainy day) in japan, when air (for example, 95% at 12 ℃) having a relatively high humidity dehumidified by an air conditioner or the like is ventilated, the water (hypochlorous acid water) containing the purified component which is micronized is difficult to gasify, and therefore the purified component (hypochlorous acid) is not gasified, and the purified component is difficult to release into the indoor space. On the other hand, in a case where a large amount of humidification is required, for example, in winter in japan, when warm air having a relatively low humidity (for example, 30% at 20 ℃) is ventilated, the water containing the purified component which is miniaturized is easily gasified, and thus the purified component is released in a large amount to the indoor space. That is, in the conventional space purifying apparatus, there is a problem that it is not easy to adjust the amount of the purifying component released into the indoor space (in the air).

Accordingly, the present disclosure solves the above-described conventional problems, and an object thereof is to provide a technique capable of easily adjusting the amount of a purification component released into the air.

In order to achieve the object, a spatial purification system according to the present disclosure includes: a hypochlorous acid water generation unit for generating hypochlorous acid water; a hypochlorous acid water supply unit for supplying hypochlorous acid water from the hypochlorous acid water supply unit to the mixing tank; a water supply unit for supplying water to the mixing tank; a water level sensor for detecting the water level of the mixing tank; a humidification/purification unit for micronizing the mixed water of hypochlorous acid water and water stored in the mixing tank and releasing the micronized mixed water into the air; and a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank. The control unit performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit at predetermined intervals and a second control of supplying water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, and performs, as a drain process, a third control of draining mixed water stored in the mixing tank when the second control is not performed within a predetermined period after the supply of water by the water supply unit, thereby achieving the desired object.

According to the spatial purification system according to the present disclosure, the amount of the purification component released into the air can be easily adjusted.

If described again, the spatial purification system according to the present disclosure includes: a hypochlorous acid water generation unit for generating hypochlorous acid water; a hypochlorous acid water supply unit for supplying hypochlorous acid water from the hypochlorous acid water supply unit to the mixing tank; a water supply unit for supplying water to the mixing tank; a water level sensor for detecting the water level of the mixing tank; a humidification/purification unit for micronizing the mixed water of hypochlorous acid water and water stored in the mixing tank and releasing the micronized mixed water into the air; and a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank. The control unit performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit at predetermined intervals and a second control of supplying water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, and performs, as a drain process, a third control of draining mixed water stored in the mixing tank when the second control is not performed within a predetermined period after the supply of water by the water supply unit.

In this way, when air having a relatively high humidity is ventilated as in summer in japan, the consumption of the mixed water stored in the mixing tank is small, and therefore, the frequency of supply of hypochlorous acid water to the mixing tank (the number of times of performing the first control) increases, and in a state where the hypochlorous acid concentration of the mixed water in the mixing tank is high, the mixed water is miniaturized and released into the air. In this case, when the second control is not executed within a predetermined period after the water is supplied from the water supply unit, the third control is executed to discharge the mixed water stored in the mixing tank and reset the mixed water in the mixing tank, whereby an excessive increase in hypochlorous acid concentration in the mixing tank can be suppressed. As a result, even in a situation where the hypochlorous acid water having been micronized is difficult to gasify, hypochlorous acid having a concentration as high as a predetermined level can be contained in the air and released into the indoor space. On the other hand, when air having a relatively low humidity is ventilated as in winter in japan, the consumption of the mixed water stored in the mixing tank increases, and therefore, the frequency of supplying water to the mixing tank (the number of times of performing the second control) increases, and the mixed water is pulverized and released into the air in a state where the hypochlorous acid concentration of the mixed water in the mixing tank is low. As a result, even in a case where the hypochlorous acid water having been pulverized is easily gasified, hypochlorous acid having a concentration as low as a predetermined concentration can be contained in the air and released into the indoor space. That is, in the space purifying system, the amount of hypochlorous acid released into the air can be easily adjusted.

Further, in the spatial purification system according to the present disclosure, it is preferable that the control section executes the third control immediately before executing the first control. In this way, in the space purification system, since the third control is not performed immediately after hypochlorous acid is supplied to the mixing tank by the first control, the hypochlorous acid water supplied by the first control can be used continuously for a maximum amount of time, and waste caused by the third control in the water discharge can be reduced.

In the space purification system according to the present disclosure, the predetermined period is preferably set based on the concentration of hypochlorous acid water supplied by the first control. For example, in the space purification system, when the concentration of hypochlorous acid water supplied by the first control is high, if the supply of water by the second control is not performed, the increase in the concentration of hypochlorous acid water in the mixing tank is fast. Therefore, by setting the predetermined period to be short, an excessive increase in the concentration of hypochlorous acid water in the mixing tank can be more reliably suppressed.

The following describes modes for carrying out the present disclosure with reference to the drawings. The following embodiments are examples for embodying the present disclosure, and do not limit the technical scope of the present disclosure. In all the drawings, the same parts are denoted by the same reference numerals, and description thereof is omitted. Further, for the details of each part not directly related to the present disclosure, the description of each drawing is omitted in order to avoid repetition.

Fig. 10 is a diagram showing a configuration of a spatial purification system 2100 according to embodiment 3 of the present disclosure. The space purification system 2100 is a device that performs a cooling process (dehumidifying process) or a heating process as necessary on air 2008 (RA 2) from the indoor space 2018 when circulating the air in the indoor space 2018, and includes water to be micronized and a component that performs air purification (hereinafter, simply referred to as an "air purification component") on the air 2008 flowing inside. The space purification system 2100 performs sterilization and deodorization of the indoor space 2018 by supplying air 2009 (SA 2) flowing inside to the indoor space 2018. Here, hypochlorous acid is used as the air-purifying component, and water containing the air-purifying component is hypochlorous acid water.

As shown in fig. 10, the space purification system 2100 is mainly configured to include a space purification device 2010, an air-conditioning device 2015, and a hypochlorous acid water generation unit 2030.

The space purification device 2010 includes an ejection port 2003, an air purification unit 2011, and an air purification control unit 2041. The air-conditioning apparatus 2015 includes a suction port 2002, a blower 2013, a refrigerant coil 2014, and an air-conditioning control unit 2042. Each of the space purification device 2010 and the air conditioning device 2015 has a case constituting an outer frame of the device, and the space purification device 2010 and the air conditioning device 2015 are connected by a duct 2024. Further, a suction port 2002 is formed in a side surface of the air conditioner 2015, and a discharge port 2003 is formed in a side surface of the space purification device 2010.

The intake port 2002 is an intake port for taking in air 2008 from the indoor space 2018 to the air conditioner 2015. The suction port 2002 communicates with an indoor suction port 2016a provided in a ceiling or the like of the indoor space 2018 via a duct 2016. Thus, the air inlet 2002 can suck air in the indoor space 2018 from the indoor air inlet 2016a into the air-conditioning device 2015.

The discharge port 2003 is a discharge port that discharges the air 2009 (SA 2) flowing through the space purification device 2010 to the indoor space 2018. The discharge port 2003 communicates with an indoor discharge port 2017a provided in a ceiling or the like of the indoor space 2018 via a pipe 2017. As a result, the discharge port 2003 can discharge the air 2009 flowing through the space purification device 2010 from the indoor discharge port 2017a to the indoor space 2018.

In addition, inside the air-conditioning device 2015 and the space purification device 2010, air passages (a front-stage air passage 2004, a middle-stage air passage 2005, and a rear-stage air passage 2006) are formed that communicate the suction port 2002 with the discharge port 2003 via the duct 2024. The front-stage air passage 2004 is an air passage adjacent to the suction port 2002. In the front-stage air passage 2004, a blower 2013 and a refrigerant coil 2014 are provided.

The middle air passage 2005 is an air passage through which air 2008 flowing through the front air passage 2004 flows at a position adjacent to the front air passage 2004 (the duct 2024). The middle air duct 2005 is provided with an air cleaner 2011 in the air duct.

The rear-stage air passage 2006 is an air passage adjacent to the discharge port 2003, and in the rear-stage air passage 2006, air 2008 flowing through the middle-stage air passage 2005 flows through the air cleaner 2011 to become air 2009 including water and hypochlorous acid that are micronized.

In the air conditioner 2015 and the space purification apparatus 2010, air 2008 sucked from the suction port 2002 flows through the front-stage air passage 2004, flows through the middle-stage air passage 2005 and the rear-stage air passage 2006, and is ejected from the ejection port 2003 as air 2009.

The blower 2013 of the air conditioner 2015 is a device for conveying air 2008 (RA 2) in the indoor space 2018 from the intake port 2002 into the air conditioner 2015. The blower 2013 is provided upstream of the refrigerant coil 2014 in the front stage air passage 2004. In the blower 2013, on/off of the operation is controlled based on the blower output information from the air conditioning control unit 2042. By the operation of the blower 2013, the air 2008 in the indoor space 2018 is taken into the air conditioner 2015 and is sent to the refrigerant coil 2014.

The refrigerant coil 2014 is disposed downstream of the blower 2013 in the front-stage air passage 2004, and is a member for cooling or heating the introduced air 2008. The refrigerant coil 2014 changes the output state (cooling, heating, or turning off) according to the output signal from the air conditioning control unit 2042, and adjusts the cooling capacity (cooling amount) or heating capacity (heating amount) for the introduced air 2008. In the refrigerant coil 2014, when the introduced air 2008 is cooled, the introduced air 2008 is dehumidified, and therefore the cooling capacity (cooling amount) for the air 2008 may be referred to as a dehumidifying capacity (dehumidifying amount) for the air 2008.

The refrigerant coil 2014 functions as a heat absorber or a radiator in a refrigeration cycle including a compressor, a radiator, an expander, and a heat absorber, and is configured to absorb heat (cool) or dissipate heat (heat) when the refrigerant introduced from the outdoor unit 2020 flows therein. More specifically, the refrigerant coil 2014 is connected to the outdoor unit 2020 via a refrigerant circuit 2021 through which a refrigerant flows. The outdoor unit 2020 is an outdoor unit provided in the outdoor space 2019, and includes a compressor 2020a, an expander 2020b, an outdoor heat exchanger 2020c, a blower fan 2020d, and a four-way valve 2020e. Since the general configuration of the outdoor unit 2020 can be used, detailed descriptions of the respective devices (the compressor 2020a, the expander 2020b, the outdoor heat exchanger 2020c, the blower fan 2020d, and the four-way valve 2020 e) will be omitted.

Since the four-way valve 2020e is connected to the refrigeration cycle including the refrigerant coil 2014, the air conditioner 2015 can be switched between a state of a cooling mode (dehumidifying mode) in which the air (air 2008) is cooled and dehumidified by the four-way valve 2020e flowing the refrigerant in the first direction and a state of a heating mode in which the air (air 2008) is heated by the four-way valve 2020e flowing the refrigerant in the second direction.

Here, the first direction is a direction in which the refrigerant flows through the compressor 2020a, the outdoor heat exchanger 2020c, the expander 2020b, and the refrigerant coil 2014 in this order. The second direction is a direction in which the refrigerant flows through the compressor 2020a, the refrigerant coil 2014, the expander 2020b, and the outdoor heat exchanger 2020c in this order. The refrigerant coil 2014 can cool or heat the introduced air (air 2008).

The air purification unit 2011 of the space purification apparatus 2010 is a unit for humidifying the air 2008 taken into the inside, and includes water and hypochlorous acid which are micronized into air at the time of humidification. More specifically, the air cleaner 2011 includes a mixing tank 2092, a water level sensor 2090, a humidification motor 2011a, and a humidification nozzle 2011b. The air cleaner 2011 is configured to rotate the humidifying nozzle 2011b by using the humidifying motor 2011a, and to suck up the hypochlorous acid water stored in the mixing tank 2092 of the air cleaner 2011 by centrifugal force, to scatter, collide and crush the hypochlorous acid water to the surrounding (centrifugal direction), and to make the passing air contain moisture. The air cleaner 2011 changes the number of revolutions (hereinafter, rotational output value) of the humidification motor 2011a according to an output signal from the air cleaner control unit 2041, and adjusts humidification capacity (humidification amount). The humidification amount may also be referred to as an additional amount of hypochlorous acid added to the air. The air cleaner 2011 corresponds to a "humidification cleaner" in the claims.

The water level sensor 2090 measures the water level of the hypochlorous acid water stored in the mixing tank 2092, and outputs the measured value to the air cleaning control unit 2041. More specifically, the water level sensor 2090 measures the water level of the hypochlorous acid water stored in the mixing tank 2092 as the water level of the hypochlorous acid water stored in the mixing tank 2092, and the water level of the mixing tank 2092 in the water shortage state, and outputs the measured values as water level information to the air cleaning control unit 2041. In the present embodiment, the water level at which the mixing tank 2092 is in the water shortage state is set to a water level at which the hypochlorous acid amount of hypochlorous acid water in the mixing tank 2092 is reduced from the full water state to about 1/3.

The mixing tank 2092 is a tank for storing hypochlorous acid water in the air cleaning unit 2011, and is also called a water storage unit. In the mixing tank 2092, hypochlorous acid water of a predetermined concentration supplied from a hypochlorous acid water supply unit 2036 described later and water supplied from a water supply unit 2050 described later are mixed in the tank, and stored as mixed water containing diluted hypochlorous acid water. The hypochlorous acid water (mixed water) stored in the mixing tank 2092 can be discharged from the mixing tank 2092 to the outside through the water discharge unit 2060 that operates according to the output signal from the air purification control unit 2041.

The hypochlorous acid water generating section 2030 includes an electrolytic tank 2031, an electrode 2032, an electromagnetic valve 2033, a brine tank 2034, a brine transfer pump 2035, a water level sensor 2039, and a hypochlorous acid water supplying section 2036.

The brine tank 2034 stores brine, and supplies brine to the electrolytic tank 2031 via the brine pump 2035 according to an output signal from the air purification control unit 2041. The electrolytic tank 2031 stores brine, which is an electrolysis target supplied from the brine tank 2034. Based on the output signal from the air purification control unit 2041, tap water is supplied from a water supply pipe such as a tap water pipe to the electrolytic tank 2031 via the electromagnetic valve 2033, and the supplied tap water is mixed with brine, and brine of a predetermined concentration is stored. The electrode 2032 is disposed in the electrolytic cell 2031, and is energized to electrolyze brine for a predetermined time based on an output signal from the air purification control unit 2041, thereby generating hypochlorous acid water of a predetermined concentration. That is, the electrolytic tank 2031 generates hypochlorous acid water by electrolyzing an aqueous chloride solution (for example, an aqueous sodium chloride solution) as an electrolyte between a pair of electrodes. Since a general device can be used for the electrolytic tank 2031, a detailed description thereof will be omitted. The electrolyte is an electrolyte capable of generating hypochlorous acid water, and is not particularly limited as long as it contains chloride ions even in a small amount, and examples of the solute include an aqueous solution in which sodium chloride, calcium chloride, magnesium chloride, or the like is dissolved. In addition, there is no problem even with hydrochloric acid. In this embodiment, as the electrolyte, a sodium chloride aqueous solution (brine) in which sodium chloride is added to water is used.

The water level sensor 2039 measures the water level in the electrolytic bath 2031, and outputs the measured value to the air purification control unit 2041.

The hypochlorous acid water supply unit 2036 supplies hypochlorous acid water from the electrolytic tank 2031 to the mixing tank 2092 of the air purification unit 2011 based on an output signal from the air purification control unit 2041. The hypochlorous acid water supply unit 2036 includes a hypochlorous acid water delivery pump 2037 and a water delivery pipe 2038. The hypochlorous acid water transfer pump 2037 sends hypochlorous acid water of the electrolytic tank 2031 to the water sending pipe 2038 based on an output signal from the air purification control unit 2041. The water supply pipe 2038 is connected between the hypochlorous acid water supply pump 2037 and the mixing tank 2092, and supplies hypochlorous acid water to the mixing tank 2092.

The water supply unit 2050 supplies water to the mixing tank 2092 based on an output signal from the air purification control unit 2041. The water supply portion 2050 includes a solenoid valve 2051 and a water supply pipe 2052. The solenoid valve 2051 controls whether or not to allow water supplied from a tap water pipe outside the space purification apparatus 2010 to flow to the water supply pipe 2052, based on an output signal from the air purification control unit 2041. A water supply pipe 2052 is connected between the solenoid valve 2051 and the mixing tank 2092, and supplies water to the mixing tank 2092.

The drain unit 2060 is connected to the bottom of the mixing tank 2092, and discharges the mixed water stored in the mixing tank 2092 to the outside based on an output signal from the air purification control unit 2041. The drain portion 2060 includes an electromagnetic valve 2061 and a water pipe 2062. The electromagnetic valve 2061 controls whether or not to allow the mixed water stored in the mixing tank 2092 to flow to an external drain pipe based on an output signal from the air purification control unit 2041. The water supply pipe 2062 is connected between the mixing tank 2092 and the electromagnetic valve 2061, and supplies the mixed water to an external drain pipe.

In the air cleaner 2011, hypochlorous acid water from the hypochlorous acid water supply unit 2036 and water from the water supply unit 2050 are supplied to the mixing tank 2092, respectively. The hypochlorous acid water is mixed with water in the mixing tank 2092 of the air cleaner 2011. The mixed water of hypochlorous acid water and water may also be referred to as hypochlorous acid water. More specifically, in the mixing tank 2092 of the air cleaner 2011, hypochlorous acid water from the hypochlorous acid water supply unit 2036 or water from the water supply unit 2050 is supplied to the hypochlorous acid water remaining in the mixing tank 2092, respectively, and mixed. The air cleaner 2011 centrifugally pulverizes the mixed water of hypochlorous acid water and water stored in the mixing tank 2092, thereby releasing hypochlorous acid water into the indoor space 2018. The micronized hypochlorous acid water is released into the indoor space 2018 in a state where the liquid component is evaporated.

An operation device 2043 is provided on a wall surface of the indoor space 2018. The operation device 2043 is provided with a user interface operable by a user, and receives a temperature setting value and a humidity setting value from the user. The operation device 2043 includes a temperature and humidity sensor 2044, and the temperature and humidity sensor 2044 measures the temperature and humidity of the air in the indoor space 2018. The temperature and humidity in the temperature and humidity sensor 2044 may be measured by a known technique, and therefore, the description thereof is omitted here.

The operation device 2043 is connected to the air cleaning control unit 2041 and the air conditioning control unit 2042 by wires or wirelessly, and transmits a temperature set value, a humidity set value, a temperature measured value, and a humidity measured value to the air cleaning control unit 2041 and the air conditioning control unit 2042. The information may be transmitted collectively, or may be transmitted individually, with 2 or more pieces. The operation device 2043 may send information to the air purification control unit 2041, and the air purification control unit 2041 may transfer the information to the air conditioning control unit 2042.

The air conditioning control unit 2042 of the air conditioning apparatus 2015 receives the temperature set value and the temperature measured value, and controls the refrigerant coil 2014 and the outdoor unit 2020 so that the temperature measured value approaches the temperature set value. In the heating mode, the air conditioning control unit 2042 increases the degree of heating as the difference between the temperature measured value and the temperature set value increases when the temperature measured value is lower than the temperature set value.

Next, the air purification control unit 2041 of the space purification apparatus 2010 will be described.

The air purification control unit 2041 controls, as the processing operations of the hypochlorous acid water generation unit 2030 and the space purification apparatus 2010, the operation related to the electrolytic process in the electrolytic tank 2031, the operation related to the supply process of hypochlorous acid water to the air purification unit 2011, the operation related to the supply process of water to the air purification unit 2011, the operation related to the humidification purification process in the air purification unit 2011, and the operation related to the drainage process of mixed water in the air purification unit 2011, respectively. The air purification control unit 2041 includes a computer system having a processor and a memory. The computer system functions as a control unit by executing the program stored in the memory by the processor. The program executed by the processor is recorded in advance in the memory of the computer system, but may be provided by being recorded in a nonvolatile recording medium such as a memory card, or may be provided by being provided through an electric communication line such as the internet. The air purification control unit 2041 corresponds to a "control unit" in the claims.

Fig. 11 is a block diagram showing the configuration of the air purification control unit 2041 of the space purification system 2100 according to embodiment 3. Specifically, as shown in fig. 11, the air purification control unit 2041 includes an input unit 2041a, a storage unit 2041b, a timer unit 2041c, a processing unit 2041d, and an output unit 2041e.

< action related to electrolytic treatment in electrolytic tank >

The air cleaning control unit 2041 performs the following process as an operation related to the electrolytic process in the electrolytic tank 2031.

The air purification control unit 2041 receives water level information (water shortage signal) from the water level sensor 2039 and time-related information (time information) from the timer unit 2041c as trigger factors for the electrolytic process of the electrolytic tank 2031, and outputs the received information to the processing unit 2041 d.

The processing unit 2041d determines control information based on the water level information from the water level sensor 2039, the time information from the time counting unit 2041c, and the setting information from the storage unit 2041b, and outputs the control information to the output unit 2041e. Here, the setting information includes information about the start time or the end time of the formation of hypochlorous acid water, information about the supply amount of tap water to be introduced into the electrolytic tank 2031, information about the amount of liquid containing chloride ions to be introduced into the brine transfer pump 2035, information about the electrolysis conditions (time, current value, voltage, etc.) in the electrode 2032, information about the opening and closing timing of the electromagnetic valve 2033, and information about the opening/closing operation of the hypochlorous acid water transfer pump 2037.

Here, the electrolysis conditions in the electrode 2032 can be determined based on the amount of tap water in the electrolytic tank 2031, the chloride ion concentration, the electrolysis time, and the degree of degradation of the electrode 2032, and an algorithm can be created and set and stored in the storage unit 2041b.

The output unit 2041e outputs signals (control signals) to the respective devices (the brine pump 2035, the solenoid valve 2033, and the hypochlorous acid water pump 2037) based on the received control information.

In more detail, first, the saline transfer pump 2035 is maintained in a stopped state based on a signal from the output unit 2041e, and the hypochlorous acid water transfer pump 2037 is maintained in a stopped state based on a signal from the output unit 2041 e.

The solenoid valve 2033 is opened based on a signal from the output unit 2041 e. Thereby, supply of tap water from the tap water pipe to the electrolytic tank 2031 is started. Then, the electromagnetic valve 2033 is closed based on a signal from the output unit 2041e that receives the water level information (full water) from the water level sensor 2039. Thus, the electrolytic tank 2031 is supplied with tap water in a set supply amount.

Next, the brine transfer pump 2035 starts to operate based on a signal from the output unit 2041e, and transfers a liquid containing a predetermined amount of chloride ions to the electrolytic tank 2031 and stops. Thus, chloride ions are dissolved in tap water, and the electrolytic tank 2031 is in a state where an aqueous solution (chloride aqueous solution) containing a predetermined amount of chloride ions is produced.

Then, the electrode 2032 starts electrolysis of the aqueous chloride solution based on the signal from the output unit 2041e, and generates and stops hypochlorous acid water under the set conditions. The hypochlorous acid water generated by the electrode 2032 is, for example, in a state where the hypochlorous acid concentration is 100ppm to 150ppm (for example, 120 ppm) and the pH is 7.0 to 8.5 (for example, 8.0).

As described above, the air cleaning control unit 2041 performs electrolytic processing in the electrolytic tank 2031 to generate hypochlorous acid water in a predetermined concentration and amount.

< action related to supply treatment of hypochlorous acid Water to air purification section >

The air cleaning control unit 2041 performs the following processing as an operation related to the supply processing of hypochlorous acid water to the air cleaning unit 2011.

As a trigger of the supply process of hypochlorous acid water to the air cleaning unit 2011, the timer unit 2041c measures the operation time of the humidifying motor 2011a, and the air cleaning control unit 2041 outputs a hypochlorous acid water supply request to the hypochlorous acid water supply unit 2030 (hypochlorous acid water supply unit 2036) every time a predetermined time (for example, 60 minutes) elapses. Here, the predetermined time is estimated by experimental evaluation in advance based on the fact that hypochlorous acid in hypochlorous acid water is gasified and decreases with time.

Specifically, the processing unit 2041d determines control information based on time-related information (time information) from the timer unit 2041c and setting information from the storage unit 2041b, and outputs the control information to the output unit 2041 e. Here, the setting information includes information on the supply interval (for example, 60 minutes) of hypochlorous acid water and information on the on/off operation of the hypochlorous acid water transfer pump 2037.

The output unit 2041e outputs a signal (control signal) to the hypochlorous acid water transfer pump 2037 of the hypochlorous acid water supply unit 2036 based on the received control information.

The hypochlorous acid water feed pump 2037 is operated based on a signal from the output unit 2041 e. As a result, the hypochlorous acid water generation unit 2030 starts the supply of hypochlorous acid water from the electrolytic tank 2031 to the air purification unit 2011 (mixing tank 2092). In order to ensure the concentration of hypochlorous acid water stored in the electrolytic tank 2031, when hypochlorous acid water is supplied from the hypochlorous acid water generating unit 2030 to the mixing tank 2092, the hypochlorous acid water generated in the electrolytic tank 2031 is supplied in full. Therefore, after the hypochlorous acid water is supplied, the electrolytic tank 2031 is empty, and the hypochlorous acid water is not produced from the state where the hypochlorous acid water remains in the electrolytic tank 2031. When the hypochlorous acid water in the electrolytic tank 2031 is supplied in full, the water level sensor 2039 outputs a water shortage signal as water level information.

Then, the hypochlorous acid water transfer pump 2037 is stopped based on a signal from the output unit 2041e that receives time-related information (for supplying a predetermined amount of desired time) from the time counting unit 2041 c. Thus, the hypochlorous acid water generating unit 2030 supplies hypochlorous acid water from the electrolytic tank 2031 to the air purifying unit 2011 (mixing tank 2092) in a set supply amount.

As described above, the air cleaning control unit 2041 performs supply processing of hypochlorous acid water from the hypochlorous acid water generating unit 2030 (electrolytic tank 2031) to the air cleaning unit 2011. The control of the hypochlorous acid water supply by the hypochlorous acid water supply unit 2036 by the air purification control unit 2041 is set to "first control" every predetermined time.

< action related to supply treatment of Water to air purification section >

The air cleaning control unit 2041 performs the following processing as an operation related to the supply processing of water to the air cleaning unit 2011.

The air purification control unit 2041 receives water level information (water shortage signal) from the water level sensor 2090 of the space purification apparatus 2010 as a trigger of the supply process of water to the air purification unit 2011, and outputs a water supply request to the water supply unit 2050.

Specifically, the input unit 2041a receives water level information (water shortage signal) from the water level sensor 2090 of the spatial purification device 2010, and outputs the received water level information to the processing unit 2041 d.

The processing unit 2041d determines control information based on the water level information (water shortage signal) from the input unit 2041a, time-related information (time information) from the timer unit 2041c, and setting information from the storage unit 2041b, and outputs the control information to the output unit 2041 e. Here, the setting information includes information related to the opening/closing operation of the solenoid valve 2051 of the water supply portion 2050.

The output unit 2041e outputs a signal (control signal) to the solenoid valve 2051 based on the received control information.

The solenoid valve 2051 operates based on a signal from the output unit 2041 e. As a result, the water supply unit 2050 starts the supply of water from the external water supply pipe to the air cleaner 2011 (mixing tank 2092) via the water supply pipe 2052.

Then, the solenoid valve 2051 is stopped based on a signal from the output unit 2041e that receives water level information (full water signal) from the water level sensor 2090 of the spatial purification device 2010. Thus, the water supply unit 2050 supplies water from an external water supply pipe to the air purification unit 2011 (mixing tank 2092) until the amount reaches a set amount.

As described above, the air cleaning control unit 2041 performs the supply process of water from the water supply unit 2050 to the air cleaning unit 2011. The control of the water supply by the water supply unit 2050 by the air purification control unit 2041 is set to "second control" based on the information (water shortage information) on the water level of the mixing tank 2092 from the water level sensor 2090.

< action related to humidification purification treatment in air purification section >

Next, an operation related to the humidification purification process in the air purification unit 2011 of the air purification control unit 2041 will be described.

The input unit 2041a receives user input information from the operation device 2043, temperature and humidity information of the air in the indoor space 2018 from the temperature and humidity sensor 2044, and water level information of the hypochlorous acid water (mixed water) in the mixing tank 2092 from the water level sensor 2090. The input unit 2041a outputs the received pieces of information to the processing unit 2041d.

Here, the operation device 2043 is a terminal that inputs user input information (for example, an air volume, a target temperature, a target humidity, the presence or absence of hypochlorous acid addition, a target supply amount level of hypochlorous acid, and the like) related to the space purification device 2010, and is communicably connected to the air purification control unit 2041 by wireless or wired connection.

The temperature and humidity sensor 2044 is provided in the indoor space 2018, and senses the temperature and humidity of the air in the indoor space 2018.

The storage unit 2041b stores the user input information received by the input unit 2041a and supply setting information in the hypochlorous acid supply operation for the air flowing through the apparatus. The storage unit 2041b outputs the stored supply setting information to the processing unit 2041d. The supply setting information during the hypochlorous acid supply operation may be referred to as humidification setting information during the humidification purification operation of the air purification unit 2011.

The timer unit 2041c outputs time information about the current time to the processing unit 2041d.

The processing unit 2041d receives various information (user input information, temperature and humidity information, water level information) from the input unit 2041a, time information from the timer unit 2041c, and supply setting information from the storage unit 2041 b. The processing unit 2041d uses the received user input information, time information, and supply setting information to determine control information related to the humidification purification operation.

Specifically, the processing unit 2041d determines the required humidification amount of the indoor space 2018 based on the humidity difference between the target humidity stored in the storage unit 2041b and the temperature and humidity information of the air in the indoor space 2018 from the temperature and humidity sensor 2044 at regular intervals from the time information from the time counting unit 2041 c. The processing unit 2041d determines control information related to the humidification purification operation based on the determined humidification demand and the supply setting information stored in the storage unit 2041 b. The processing unit 2041d outputs the specified control information to the output unit 2041e.

When the water level information from the water level sensor 2090 includes information (water shortage signal) indicating the water level of the hypochlorous acid water (mixed water) in the mixing tank 2092, the processing unit 2041d outputs a signal indicating a water supply request to the water supply unit 2050 to the output unit 2041e. Further, the processing unit 2041d outputs a hypochlorous acid water supply request signal to the hypochlorous acid water generating unit 2030 to the output unit 2041e when the operation time of the air purifying unit 2011 (the humidification motor 2011 a) is a predetermined time (for example, 60 minutes) based on the time information from the time counting unit 2041 c. In the present embodiment, the water level indicating that hypochlorous acid water (mixed water) in the mixing tank 2092 is deficient is set to a water level at which the hypochlorous acid water (mixed water) in the mixing tank 2092 is reduced from a full state to about 1/3 of the hypochlorous acid water.

The output unit 2041e outputs the received signals to the air cleaner 2011, the hypochlorous acid water generator 2030 (hypochlorous acid water supply unit 2036), and the water supply unit 2050, respectively.

The air cleaner 2011 receives the signal from the output unit 2041e, and performs control of the operation based on the received signal. At this time, the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036) receives a signal (hypochlorous acid water supply request signal) from the output unit 2041e, and executes an operation (first control) related to the supply process of hypochlorous acid water to the air purifying unit 2011 based on the received signal. The water supply unit 2050 receives a signal (a signal of a water supply request) from the output unit 2041e, and executes an operation (second control) related to the supply process of water to the air purification unit 2011 based on the received signal.

As described above, the air purification control unit 2041 performs, as the supply process, a first control of supplying hypochlorous acid water to the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036) at predetermined intervals and a second control of supplying water to the mixing tank 2092 by the water supplying unit 2050 based on the information (water shortage information) on the water level of the mixing tank 2092 from the water level sensor 2090, respectively, and stores the mixed water in the mixing tank 2092. When hypochlorous acid water and water are supplied to the mixing tank 2092 and mixed water is stored, the air purification control unit 2041 performs humidification purification of air flowing through the space purification device 2010 (the air purification unit 2011) by making the hypochlorous acid water supply cycle (every predetermined time) and the water supply cycle (every time water shortage detection) different from each other.

< action related to drainage treatment of Mixed Water of air purification portion >

The air cleaning control unit 2041 performs the following processing as an operation related to the drainage processing of the mixed water stored in the mixing tank 2092 of the air cleaning unit 2011.

The air purification control unit 2041 determines whether or not the drainage process is performed based on information (execution time information) on the execution time of the second control in the water supply unit 2050 as a trigger of the drainage process of the mixed water stored in the mixing tank 2092.

Specifically, the storage unit 2041b stores execution time information of the second control. Here, the execution timing is the execution timing of the second control executed after the start of the humidification purification process operation (hereinafter, also referred to as "after the start of the operation") starting from the initial state of the mixing tank 2092 (for example, the state in which the mixing tank 2092 is full of water by the supply of water and the supply of hypochlorous acid water performed after the drainage process). The execution timing of the second control is stored in the storage unit 2041b every time the second control is executed. The storage unit 2041b also includes and stores the time at which the humidification purification process operation is started in the execution time information of the second control.

The processing unit 2041d determines a period during which the second control is not executed (non-execution period of the second control) based on the execution time information of the second control from the storage unit 2041b and the time-related information (time information) from the timer unit 2041 c. The processing unit 2041d determines whether or not the specified non-execution period of the second control is equal to or longer than the reference time.

Here, the reference time is set to "6 hours" based on the hypochlorous acid concentration of the hypochlorous acid water supplied from the hypochlorous acid water supply unit 2036 so that the hypochlorous acid water concentration in the mixing tank 2092 does not exceed the reference concentration by the continuous hypochlorous acid water supply realized by the first control only. The reference concentration is set to a hypochlorous acid concentration at which a user in the indoor space 2018 does not become uncomfortable due to odor or the like of the air 2009 (the air 2009 including hypochlorous acid) ejected to the indoor space 2018. The reference time corresponds to a "predetermined period" of the claims.

When the non-execution period of the second control is equal to or longer than the reference time as a result of the determination, the processing unit 2041d determines control information based on the time information from the timer unit 2041c and the setting information from the storage unit 2041b, and outputs the control information to the output unit 2041e. Here, the setting information includes information related to the opening/closing operation of the electromagnetic valve 2061 of the drain unit 2060.

The output unit 2041e outputs a signal (control signal) to the electromagnetic valve 2061 based on the received control information.

The electromagnetic valve 2061 operates based on a signal from the output unit 2041 e. As a result, the drain portion 2060 starts to drain the mixed water from the mixing tank 2092 to the external drain pipe via the water pipe 2062.

Then, the electromagnetic valve 2061 is stopped after a predetermined time (for example, 1 minute) has elapsed based on a signal from the output unit 2041e that receives the time information from the timer unit 2041 c. Thus, all the mixed water stored in the mixing tank 2092 is discharged to be empty.

As described above, the air purification control unit 2041 performs the water discharge process of the mixed water from the mixing tank 2092 to the outside. The control of the mixed water discharge by the water discharge unit 2060 by the air purification control unit 2041 based on the information (non-execution period of the second control) related to the execution timing of the second control in the water supply unit 2050 is referred to as "third control".

Next, with reference to fig. 12 to 14, in the space purification system 2100, the mixed water (mixed water obtained by performing the first control or the second control) in the mixing tank 2092 of the space purification device 2010 (the air purification unit 2011) will be described. Fig. 12 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change over time of the hypochlorous acid concentration in the space purification system 2100 (winter: first example). In more detail, fig. 12 (a) shows the change with time of the amount of the hypochlorous acid water (mixed water) in the mixing tank 2092. Fig. 12 (b) shows a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092. Fig. 12 (c) shows the change with time of the concentration of the hypochlorous acid contained in the air of the ejection port 2003. Fig. 13 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration (summer: second example) in the space purification system 2100. In more detail, fig. 13 (a) shows the change with time of the amount of the hypochlorous acid water (mixed water) in the mixing tank 2092. Fig. 13 (b) shows a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092. Fig. 13 (c) shows the change with time of the concentration of the hypochlorous acid contained in the air of the ejection port 2003. Fig. 14 is a schematic diagram showing the amount of water, the hypochlorous acid water concentration, and the change with time of the hypochlorous acid concentration (summer: third example) in the space purification system 2100. In more detail, fig. 14 (a) shows the change with time of the amount of hypochlorous acid water (mixed water) in the mixing tank 2092. Fig. 14 (b) shows a change with time in the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092. Fig. 14 (c) shows the change with time of the concentration of the hypochlorous acid contained in the air of the ejection port 2003.

Here, the hypochlorous acid water is supplied to the mixing tank 2092 at predetermined intervals (1 hour), and the water is supplied to the mixing tank 2092 every time the water level sensor 2090 detects that the mixing tank 2092 is a water level where water is lacking.

As described above, even if hypochlorous acid water (mixed water) in the mixing tank 2092 reaches a water shortage level, about 1/3 of hypochlorous acid water (mixed water) remains in the mixing tank 2092 when the mixing tank is full of water. For simplicity of the description, the air cleaner 2011 is configured to operate at a constant humidification request amount during the humidification purification operation time. In the following, the predetermined amount of hypochlorous acid water supplied to the mixing tank 2092 is also referred to as "hypochlorous acid water stock solution".

First, the operation status in winter in japan will be described. In addition, in winter in japan, since the outside air is dried, the amount of humidification required for the air cleaner 2011 is large, and the supply of water is performed at intervals shorter than the supply of hypochlorous acid water. That is, the water level in the mixing tank 2092 becomes deficient before the timing of the hypochlorous acid water supply.

Therefore, as a first example, a process under humidification purification conditions in which 4 times of water supply (second control) and 3 times of hypochlorous acid water supply (first control) are performed until the operation time after the start of the operation of the air cleaner 2011 is 3 hours will be described below.

The humidification/purification conditions described above are set based on the case where the number of times of performing the first control is smaller than the number of times of performing the second control by controlling the air purification unit 2011 when the humidification request amount to the air purification unit 2011 is equal to or greater than the first reference value. Here, the first reference value is a value set for distinguishing a state where the humidity of the air is low and dry in winter in japan from a state where the humidity of the air is high and wet in summer in japan.

In the first example, as shown in fig. 12 (a), when the operation start is set to 0 hours, the supply of hypochlorous acid water to the mixing tank 2092 (first control) is performed at timings of 1 hour, 2 hours, and 3 hours … …. On the other hand, the supply of water to the mixing tank 2092 (second control) is performed at the timings of a2 hours, b2 hours, c2 hours, and d2 hours … …. At the time of 0 hour from the start of the operation, hypochlorous acid water and water are supplied to the mixing tank 2092, and the mixing tank 2092 is filled with hypochlorous acid water (mixed water) having a predetermined concentration (initial state).

Further, at the timing of the 3 rd hour, since the supply of hypochlorous acid water (first control) overlaps with the supply of water (second control), the first example can be regarded as the supply of hypochlorous acid water (first control) and the supply of water (second control) based on the 3-hour cycle. In this timing water supply (second control), the amount of water supplied is reduced by the amount of hypochlorous acid water supplied, in addition to about 1/3 of the amount remaining when water is fully mixed in the mixing tank 2092, and therefore the hypochlorous acid water concentration in the mixing tank 2092 is slightly higher than the initial state at the time of 0 hours.

In the first example, the hypochlorous acid water is supplied 4 times with respect to the water supply and 3 times during a period of time (a period of time from 0 hour to 3 hours or less) from 3 hours until the operation of the air cleaner 2011 is started. Then, the 3 rd hour of the operation time was regarded as an initial state (0 hour), and the same supply operation was repeated every time the operation time was 3 hours.

That is, in the first example, when the humidification request amount to the air cleaner 2011 is equal to or greater than the first reference value, the first control is controlled such that the number of times the first control is performed is smaller than the number of times the second control is performed.

In addition, in winter in japan, the supply of water (second control) is performed at intervals shorter than the reference time (6 hours) for a large humidification request amount of the air cleaner 2011. Therefore, since the second control is frequently performed, the third control is not performed to drain the mixed water.

This will be described in more detail.

Referring to fig. 12 (a), description will be given focusing on the change with time of the water level of hypochlorous acid water (mixed water) in the mixing tank 2092.

At the beginning of the operation (0 hours), the mixing tank 2092 is filled with the mixed water of the hypochlorous acid stock solution and water (also referred to as hypochlorous acid water) until it is full of water. Then, by the humidification purification operation, the amount of the mixed water is reduced at a constant rate, and the lack of water is detected at a timing of a2 hours from the start of the operation, and water is supplied from the water supply portion 2050 until the mixing tank 2092 becomes full of water. Then, by the humidification purification operation, the water level of the mixed water is reduced at a certain rate, and the supply timing of hypochlorous acid water is 1 hour, and the first control is performed. That is, the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036) to the mixing tank 2092. Thereby, the water level in the mixing tank 2092 slightly rises. Then, also in the humidification purification operation, the water level of the mixed water decreases, and the mixed water becomes deficient again at the timing of b2 hours from the start of the operation, and water is supplied from the water supply portion 2050 until the mixing tank 2092 becomes full.

Then, the first control is executed at a timing when the operation time after the start of the operation becomes 2 hours, and the hypochlorous acid aqueous stock solution is supplied from the hypochlorous acid aqueous generating unit 2030 (hypochlorous acid aqueous supply unit 2036) to the mixing tank 2092. Thereby, the water level in the mixing tank 2092 slightly rises. Then, the water level of the mixed water is also reduced by the humidification purification operation, and becomes water shortage again at the timing of c2 hours from the start of the operation, and water is supplied from the water supply portion 2050 until the mixing tank 2092 becomes full water.

Then, the operation time after the start of the operation was started was set to 3 hours (d 2 hours). At this timing, the water shortage detection overlaps with the timing of supply of the hypochlorous acid aqueous stock solution, so the first control and the second control are sequentially performed. More specifically, as the first control, the hypochlorous acid aqueous stock solution is first supplied from the hypochlorous acid aqueous generating unit 2030 (hypochlorous acid aqueous supply unit 2036) to the mixing tank 2092. Then, as a second control, water is supplied from the water supply portion 2050 until the mixing tank 2092 becomes full of water. Accordingly, the hypochlorous acid aqueous stock solution and water are supplied to the mixing tank 2092, respectively, and the water level in the mixing tank 2092 is the same as that in the initial operation (0 hours).

Then, similarly to the period from the start of the operation to the 3 hours of the operation time, water was supplied at the timing of the water shortage, and the hypochlorous acid water stock solution was repeatedly supplied at the timing of the hypochlorous acid water supply.

Next, referring to fig. 12 b, a description will be given focusing on a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092.

At the beginning of the operation (0 hours), the mixed water of the hypochlorous acid aqueous stock solution and water is mixed in the mixing tank 2092 so that the mixed water becomes a predetermined concentration (initial concentration). When the humidification purification operation is started, the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092 decreases with the passage of time from the start of the operation to a2 hours. This is because hypochlorous acid has a higher vapor pressure than water, and thus hypochlorous acid is vaporized at a certain ratio to air with respect to the concentration of hypochlorous acid water. Further, since hypochlorous acid contained in water is consumed only together with water miniaturized by the air purification unit 2011 if hypochlorous acid is not gasified, the concentration of hypochlorous acid water in the mixing tank 2092 does not change although hypochlorous acid water decreases at a constant rate according to the amount of humidification. Further, even when the water level sensor 2090 detects the water shortage, that is, a2 hours, the concentration of hypochlorous acid water is not zero, because hypochlorous acid water (mixed water) remains in the mixing tank 2092 even when the water shortage is detected, as described above.

When the time is a2 hours from the start of operation (water shortage detection), the hypochlorous acid water in the mixing tank 2092 is diluted with water by the supply of water from the water supply portion 2050, and thus the concentration of the hypochlorous acid water in the mixing tank 2092 is reduced. Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by gasification of hypochlorous acid until 1 hour, which is the timing of supply of hypochlorous acid water.

When the hypochlorous acid water is supplied for 1 hour from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 2092 increases to the initial concentration or higher with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036). This is because a predetermined amount of hypochlorous acid water (hypochlorous acid water stock solution) supplied at the start of operation is supplied to the mixed water (water containing hypochlorous acid) of a smaller amount than the water supplied at the start of operation (0 hours). Then, the concentration of hypochlorous acid water (mixed water) decreases by vaporization of hypochlorous acid until b2 hours from the start of operation (water shortage detection). The reason why the reduction rate of hypochlorous acid is faster than the initial operation is that the gasification amount of hypochlorous acid is increased in accordance with the portion where the content of hypochlorous acid contained in the mixed water is increased.

When the time is b2 hours from the start of operation (water shortage detection), the hypochlorous acid water in the mixing tank 2092 is diluted with water by the supply of water from the water supply unit 2050, and thus the concentration of hypochlorous acid water in the mixing tank 2092 is reduced. Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by gasification of hypochlorous acid until 2 hours, which is the timing of supply of hypochlorous acid water.

When the hypochlorous acid water is supplied for 2 hours from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 2092 increases to the initial concentration or higher with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036). Then, by c2 hours from the start of the operation (water shortage detection), the concentration of hypochlorous acid water (mixed water) was decreased due to vaporization of hypochlorous acid.

When the time c2 hours from the start of operation (water shortage detection) is reached, the hypochlorous acid water in the mixing tank 2092 is diluted with water by the supply of water from the water supply unit 2050, and thus the concentration of hypochlorous acid water in the mixing tank 2092 is reduced. Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by gasification of hypochlorous acid until 3 hours, which is the timing of supply of hypochlorous acid water.

When water (and hypochlorous acid water) is supplied for 3 hours (d 2 hours) from the start of the operation, water and hypochlorous acid water stock solution are supplied to the mixing tank 2092, respectively, and the concentration of hypochlorous acid water in the mixing tank 2092 is close to the initial operation (0 hours). Then, as in the above, the concentration change of hypochlorous acid water (mixed water) is repeated.

Next, referring to fig. 12 (c), a description will be given focusing on the change with time of the concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003.

The concentration of hypochlorous acid contained in the air 2009 discharged from the discharge port 2003 is determined according to the humidification amount in the air cleaning unit 2011 and the concentration of hypochlorous acid water in the mixing tank 2092, but in the first example, the humidification amount is set to be constant, and thus the concentration of hypochlorous acid water in the mixing tank 2092 is reflected. Accordingly, as shown in fig. 12 (c), the concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003 increases and decreases in accordance with the increase and decrease in the concentration of hypochlorous acid water in the mixing tank 2092 shown in fig. 12 (b).

Here, as in the prior art, when the hypochlorous acid aqueous stock solution and water are supplied to the water level sensor 2090 and the water is full, the timing from the start of the operation (0 hours) to a2 hours to 3 hours (d 2 hours) is repeated. In this case, the average concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003 is, for example, as in the conventional average concentration shown in fig. 12 (c). In contrast, in the first example, the state was the same as the conventional state from the start of operation (0 hours) to a2 hours, but the state was different from the conventional state in the period from a2 hours to 3 hours. More specifically, in the period from a2 hours to 3 hours, as shown in fig. 12 (b), the period in which the hypochlorous acid water concentration is higher than the initial concentration (a part of the period from 1 hour to b2 hours, a period from 2 hours to c2 hours) is shorter than the period in which the hypochlorous acid water concentration is lower than the initial concentration (a period from a2 hours to 1 hour, a period from b2 hours to 2 hours, and a period from c2 hours to 3 hours). Therefore, the average concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003 is lower than the conventional average concentration in the period from the start of operation (0 hour) to 3 hours.

As described above, when the hypochlorous acid water and water are supplied to the mixing tank 2092 and the mixed water is stored, the hypochlorous acid water is supplied in a different cycle (every predetermined time) from the water supply cycle (every time water shortage detection), and thus the concentration of the hypochlorous acid contained in the air 2009 from the discharge port 2003, that is, the air discharged to the indoor space 2018, can be reduced as compared with the case where the hypochlorous acid water and water are supplied to the mixing tank 2092 in the conventional method.

Next, the operation state in summer in japan will be described. In addition, in summer in japan, the outside air is moist and wet, so the amount of humidification required for the air cleaner 2011 is small, and water is supplied at intervals longer than hypochlorous acid water. That is, the supply of hypochlorous acid water (first control) has been performed several times until the supply of water (second control) is performed.

Therefore, as a second example, a process under humidification purification conditions in which 1 time of water supply (second control) and 5 times of hypochlorous acid water supply (first control) are performed until the operation time after the start of the operation of the air cleaner 2011 is 5 hours will be described below.

In the second example, as shown in fig. 13 (a), when the operation start is set to 0 hours, the supply of the hypochlorous acid aqueous stock solution to the mixing tank 2092 (first control) is performed at timings of 1 hour, 2 hours, 3 hours, 4 hours, and 5 hours. On the other hand, the water shortage detection by the water level sensor 2090 is performed at a timing of 5 hours, and the water supply to the mixing tank 2092 (second control) is performed. At the time of 0 hour from the start of the operation, hypochlorous acid water and water are supplied to the mixing tank 2092, and the mixing tank 2092 is filled with hypochlorous acid water (mixed water) having a predetermined concentration (initial state).

Specifically, the first control is executed at the timing when the operation time after the start of the operation comes 1 hour, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 2092. Then, the same control was performed until the timing at which the operation time after the start of the operation was 4 hours.

Next, the operation time after the start of the operation was set to 5 hours. At this timing, the water shortage detection overlaps with the timing of supply of the hypochlorous acid aqueous stock solution, so the first control and the second control are sequentially performed. More specifically, as the first control, hypochlorous acid aqueous stock solution is supplied from the hypochlorous acid aqueous generating unit 2030 (hypochlorous acid aqueous supply unit 2036) to the mixing tank 2092. Next, as a second control, water is supplied from the water supply portion 2050 until the mixing tank 2092 becomes full of water. Accordingly, the hypochlorous acid aqueous stock solution and water are supplied to the mixing tank 2092, respectively, and the water level in the mixing tank 2092 is set to be close to the initial operation (0 hours).

Then, the timing at which the operation time is 5 hours is regarded as an initial state (0 hours), and the same supply operation is repeated every 5 hours.

This will be described in more detail.

First, referring to fig. 13 (a), description will be made focusing on the change with time of the water level of hypochlorous acid water (mixed water) in the mixing tank 2092.

At the beginning of the operation (0 hours), the mixing tank 2092 is filled with the mixed water of the hypochlorous acid stock solution and water (also referred to as hypochlorous acid water) until it is full of water. When the humidification purification operation is started, the amount of the mixed water decreases at a constant rate due to the humidification purification operation, and the supply timing of the hypochlorous acid water is 1 hour.

In the humidification purification operation from the start of the operation to the operation time of 1 hour, the supply of the second control to the water is not performed, and therefore the non-execution period (about 1 hour) of the second control does not reach the reference time (6 hours). Accordingly, the first control is performed without performing the drainage of the mixed water stored in the mixing tank 2092, and the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036) to the mixing tank 2092. Thereby, the water level in the mixing tank 2092 slightly rises. Then, the water level of the mixed water was also reduced by the humidification purification operation, and the supply timing of the hypochlorous acid water was 2 hours.

In the humidification purification operation in the period from the start of the operation to the operation time of 2 hours, the non-execution period (about 2 hours) of the second control did not reach the reference time (6 hours). Accordingly, the first control is performed without performing the drainage of the mixed water stored in the mixing tank 2092, and the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036) to the mixing tank 2092. Thereby, the water level in the mixing tank 2092 slightly rises. Then, the same control was performed until the timing at which the operation time after the start of the operation was 4 hours. In this way, in the second example, since the amount of the mixed water is reduced at a constant rate and the hypochlorous acid water stock solution is supplied due to the humidification purification operation, the amount of the mixed water is increased and the difference between the humidification amount and the supply amount is reduced in accordance with the increase in the amount of the mixed water.

Next, the operation time after the start of the operation was started was set to 5 hours. In the humidification purification operation in the period from the start of the operation to the operation time of 5 hours, the non-execution period (about 5 hours) of the second control did not reach the reference time (6 hours). At this timing, the water shortage detection overlaps with the timing of supply of the hypochlorous acid water stock solution, so the first control and the second control are sequentially performed without performing drainage of the mixed water stored in the mixing tank 2092. As described above, as the first control, the hypochlorous acid aqueous stock solution is first supplied from the hypochlorous acid aqueous generating unit 2030 (hypochlorous acid aqueous supply unit 2036) to the mixing tank 2092. Then, as a second control, water is supplied from the water supply portion 2050 until the mixing tank 2092 becomes full of water. Accordingly, the hypochlorous acid aqueous stock solution and water are supplied to the mixing tank 2092, respectively, and the water level in the mixing tank 2092 is set to be close to the initial operation (0 hours). Further, since the water supply unit 2050 supplies water, the non-execution period of the second control is newly determined from the timing.

Then, the timing at which the operation time is 5 hours is regarded as an initial state (0 hours), and the same supply operation and drain operation are repeated every 5 hours. In more detail, as in the above, the supply of hypochlorous acid water stock solution by the first control at the timing of the supply of hypochlorous acid water and the supply of water by the second control at the timing of the supply of water are repeated. The water level of the hypochlorous acid water (mixed water) in the mixing tank 2092 increases or decreases according to each operation.

Next, referring to fig. 13 (b), a description will be given focusing on a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092.

At the beginning of the operation (0 hours), the mixed water of the hypochlorous acid aqueous stock solution and water is mixed in the mixing tank 2092 so that the mixed water becomes a predetermined concentration (initial concentration). When the humidification purification operation is started, the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092 decreases with the lapse of time from the start of the operation to 1 hour. This is because, as described above, hypochlorous acid has a higher vapor pressure than water, and thus hypochlorous acid is vaporized at a certain ratio to the concentration of hypochlorous acid water and supplied to the air.

When the hypochlorous acid water is supplied for 1 hour from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 2092 increases to the initial concentration or higher with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036). This is because, as described above, a predetermined amount of hypochlorous acid water (hypochlorous acid water stock solution) supplied at the start of operation is supplied to mixed water (water in a state including hypochlorous acid) having a smaller water amount than the mixed water stored at the start of operation (0 hours). Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by vaporization of hypochlorous acid until 2 hours from the start of operation.

When the hypochlorous acid water is supplied for 2 hours from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 2092 further increases with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036). Similarly, until the timing of 4 hours thereafter, the change in the concentration of hypochlorous acid water (mixed water) was repeated, and the concentration of hypochlorous acid water (mixed water) was gradually increased.

When the supply timing of the water supplied from the start of the operation and the hypochlorous acid aqueous stock solution is 5 hours, the water and the hypochlorous acid aqueous stock solution are supplied to the mixing tank 2092, respectively, and the concentration of the hypochlorous acid water in the mixing tank 2092 decreases because the hypochlorous acid water in the mixing tank 2092 is diluted with the water supplied from the water supply portion 2050 as the hypochlorous acid water in the mixing tank 2092 is supplied. Since hypochlorous acid water and water are supplied in a state where about 1/3 of hypochlorous acid water remains, the concentration of hypochlorous acid water in the mixing tank 2092 is not diluted to the initial concentration in the initial state. Then, the concentration of hypochlorous acid water tends to rise as a whole with the lapse of time, but basically the same as heretofore, the concentration change of hypochlorous acid water (mixed water) is repeated.

Next, referring to fig. 13 (c), a description will be given focusing on the change with time of the concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003.

Since the concentration of hypochlorous acid contained in the air 2009 discharged from the discharge port 2003 is determined based on the humidification amount in the air cleaner 2011 and the concentration of hypochlorous acid water in the mixing tank 2092, as shown in fig. 13 (c), the concentration of hypochlorous acid contained in the air 2009 from the discharge port 2003 increases and decreases in accordance with the increase and decrease in the concentration of hypochlorous acid water in the mixing tank 2092 shown in fig. 13 (b).

Here, as in the prior art, when the hypochlorous acid aqueous stock solution and water are supplied to the water level sensor 2090 every time the water is short of water, the concentration of hypochlorous acid water is continuously reduced from the start of operation (0 hours) to 5 hours. Strictly speaking, the concentration of hypochlorous acid water continuously decreases from the full water state to the time when the lack of water is detected within 5 hours. In this case, the average concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003 is, for example, as in the conventional average concentration shown in fig. 13 (c).

In contrast, in the second example, the state was the same as the conventional state from the start of operation (0 hours) to 1 hour, but the state was different from the conventional state in the period from 1 hour to 5 hours of operation time. More specifically, as shown in fig. 13 (b), the period in which the concentration of hypochlorous acid water is higher than the initial concentration is significantly longer than the period in which the concentration is lower than the initial concentration in the period from 1 hour to 5 hours of the operation time. Therefore, the average concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003 is higher than the conventional average concentration in the period from the start of operation (0 hour) to 5 hours.

Further, since the change in the concentration of the mixed water is repeated every 5 hours with respect to the 1 cycle of 5 hours after the operation time of 5 hours, the concentration of hypochlorous acid water can be continuously adjusted within a range of a certain concentration or less without continuously increasing the concentration of hypochlorous acid water.

Next, as a third example, a process under humidification purification conditions in which water supply (second control) is not performed until the operation time after the start of the operation of the air purification unit 2011 is 6 hours will be described. That is, the third example is a treatment under conditions in which humidification is difficult in summer in japan than in the second example.

In the third example, as shown in fig. 14 (a), when the operation start is set to 0 hours, the supply of the hypochlorous acid aqueous stock solution to the mixing tank 2092 (first control) is performed at timings of 1 hour, 2 hours, and 3 hours … …. On the other hand, since the consumption amount with humidification purification is smaller than that of the second example, the supply of water to the mixing tank 2092 is not performed without performing the water shortage detection achieved by the water level sensor 2090 (second control). At the time of 0 hour from the start of the operation, hypochlorous acid water and water are supplied to the mixing tank 2092, and the mixing tank 2092 is filled with hypochlorous acid water (mixed water) having a predetermined concentration (initial state).

Specifically, the first control is executed at the timing when the operation time after the start of the operation comes 1 hour, and the hypochlorous acid aqueous stock solution is supplied to the mixing tank 2092. Then, the same control was performed until the timing at which the operation time after the start of the operation was 5 hours.

Next, the operation time after the start of the operation was 6 hours. Since the non-execution period of the second control is 6 hours at this timing, it is determined that the non-execution period of the second control is equal to or longer than the reference time (6 hours). Then, the third control is executed in response to the determination result, and the mixed water in the mixing tank 2092 is completely discharged. Further, after the third control is performed, the supply of the hypochlorous acid water stock solution and the supply of the water are re-performed to the mixing tank 2092, and the mixing tank 2092 is in a state of being full of water due to the hypochlorous acid water (mixed water) of a predetermined concentration as in the initial state.

Then, the same supply operation and drain operation were repeated every 6 hours, taking the timing of 6 hours as the initial state (0 hours).

This will be described in more detail.

First, referring to fig. 14 (a), description will be made focusing on the change with time of the water level of hypochlorous acid water (mixed water) in the mixing tank 2092.

At the beginning of the operation (0 hours), the mixing tank 2092 is filled with the mixed water of the hypochlorous acid stock solution and water (also referred to as hypochlorous acid water) until it is full of water. In addition, the amount of the mixed water was reduced at a constant rate by the humidification purification operation, and the supply timing of hypochlorous acid water was 1 hour. Then, the water discharge judgment of the mixed water was performed at the timing of 1 hour.

At the beginning of the operation (0 hours), the mixing tank 2092 is filled with the mixed water of the hypochlorous acid stock solution and water (also referred to as hypochlorous acid water) until it is full of water. When the humidification purification operation is started, the amount of the mixed water decreases at a constant rate due to the humidification purification operation, and the supply timing of the hypochlorous acid water is 1 hour.

In the humidification purification operation from the start of the operation to the operation time of 1 hour, the supply of the second control to the water is not performed, and therefore the non-execution period (about 1 hour) of the second control does not reach the reference time (6 hours). Accordingly, the first control is performed without performing the drainage of the mixed water stored in the mixing tank 2092, and the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036) to the mixing tank 2092. Thereby, the water level in the mixing tank 2092 slightly rises. Then, the water level of the mixed water was also reduced by the humidification purification operation, and the supply timing of the hypochlorous acid water was 2 hours.

In the humidification purification operation in the period from the start of the operation to the operation time of 2 hours, the non-execution period (about 2 hours) of the second control did not reach the reference time (6 hours). Accordingly, the first control is performed without performing the drainage of the mixed water stored in the mixing tank 2092, and the hypochlorous acid water stock solution is supplied from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036) to the mixing tank 2092. Thereby, the water level in the mixing tank 2092 slightly rises. Then, the same control was performed until the timing at which the operation time after the start of the operation was 5 hours. In this way, in the third example, since the amount of the mixed water is reduced at a constant rate and the hypochlorous acid water stock solution is supplied due to the humidification purification operation, the amount of the mixed water is increased and the difference between the humidification amount and the supply amount is reduced in accordance with the increase in the amount of the mixed water.

Next, the operation time after the start of the operation was 6 hours. In the humidification purification operation in a period from the start of the operation to the operation time of 6 hours, the non-execution period (about 6 hours) of the second control is equal to or longer than the reference time (6 hours), and it is determined that the reference time is reached. Then, the third control is executed in response to the determination result, and the mixed water in the mixing tank 2092 is discharged. Further, after the third control is performed to drain the mixed water, the supply of the hypochlorous acid water stock solution and the supply of water are re-performed to the mixing tank 2092, and the mixing tank 2092 is in a state of being full of water due to the hypochlorous acid water (mixed water) of a predetermined concentration, as in the initial state (0 hours). Further, since the water supply unit 2050 supplies water, the non-execution time of the second control is newly determined from the timing.

Then, the timing at which the operation time is 6 hours is regarded as an initial state (0 hours), and the same supply operation and drain operation are repeated every 6 hours. In more detail, as in the above, the supply of hypochlorous acid water stock solution by the first control at the timing of the supply of hypochlorous acid water and the supply of water by the second control at the timing of the supply of water are repeated. The water level of the hypochlorous acid water (mixed water) in the mixing tank 2092 increases or decreases according to each operation.

Next, referring to fig. 14 b, a description will be given focusing on a change with time of the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092.

At the beginning of the operation (0 hours), the mixed water of the hypochlorous acid aqueous stock solution and water is mixed in the mixing tank 2092 so that the mixed water becomes a predetermined concentration (initial concentration). When the humidification purification operation is started, the concentration of hypochlorous acid water (mixed water) in the mixing tank 2092 decreases with the lapse of time from the start of the operation to 1 hour. This is because, as described above, hypochlorous acid has a higher vapor pressure than water, and thus hypochlorous acid is vaporized at a certain ratio to the concentration of hypochlorous acid water and supplied to the air.

When the hypochlorous acid water is supplied for 1 hour from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 2092 increases to the initial concentration or higher with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036). This is because, as described above, a predetermined amount of hypochlorous acid water (hypochlorous acid water stock solution) supplied at the start of operation is supplied to mixed water (water in a state including hypochlorous acid) having a smaller water amount than the mixed water stored at the start of operation (0 hours). Then, the concentration of hypochlorous acid water (mixed water) was slightly decreased by vaporization of hypochlorous acid 2 hours from the start of operation.

When the hypochlorous acid water is supplied for 2 hours from the start of the operation, the concentration of hypochlorous acid water in the mixing tank 2092 further increases with the supply of the hypochlorous acid water stock solution from the hypochlorous acid water generating unit 2030 (hypochlorous acid water supplying unit 2036). Similarly, until the timing of 5 hours thereafter, the change in the concentration of hypochlorous acid water (mixed water) was repeated, and the concentration of hypochlorous acid water (mixed water) was gradually increased.

When the timing of supplying hypochlorous acid aqueous stock solution is 6 hours from the start of operation, the timing of draining is determined based on the draining, so that after all of the hypochlorous acid aqueous solution (mixed water) in the mixing tank 2092 is drained, water and hypochlorous acid aqueous stock solution are supplied to the mixing tank 2092, respectively, and the concentration of hypochlorous acid aqueous solution in the mixing tank 2092 is in the same state as the initial operation (0 hours). Then, the change in the concentration of hypochlorous acid water (mixed water) was repeated as before.

Next, referring to fig. 14 (c), a description will be given focusing on the change with time of the concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003.

Since the concentration of hypochlorous acid contained in the air 2009 discharged from the discharge port 2003 is determined in accordance with the humidification amount in the air cleaning unit 2011 and the concentration of hypochlorous acid water in the mixing tank 2092 in the same manner as in the second example, the concentration of hypochlorous acid contained in the air 2009 discharged from the discharge port 2003 increases or decreases in accordance with the increase or decrease in the concentration of hypochlorous acid water in the mixing tank 2092 shown in fig. 14 (b), as shown in fig. 14 (c).

Here, as in the prior art, when the hypochlorous acid aqueous stock solution and water are supplied to the water level sensor 2090 every time the water is deficient, the concentration of hypochlorous acid water is continuously reduced from the start of operation (0 hours) to 6 hours. Strictly speaking, the concentration of hypochlorous acid water continuously decreases from the full water state to the time when the lack of water is detected within 6 hours. In this case, the average concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003 is, for example, as in the conventional average concentration shown in fig. 14 (c).

In contrast, in the third example, the state was the same as the conventional state from the start of operation (0 hours) to 1 hour, but the state was different from the conventional state in the period from 1 hour to 6 hours. More specifically, as shown in fig. 14 (b), the period from 1 hour to 6 hours is longer than the period in which the concentration of hypochlorous acid water is higher than the initial concentration, and longer than the period in which the concentration is lower than the initial concentration. Therefore, the average concentration of hypochlorous acid contained in the air 2009 of the discharge port 2003 is higher than the conventional average concentration in the period from the start of operation (0 hours) to 6 hours.

Further, since the change in the concentration of the mixed water is repeated every 6 hours for 6 hours as 1 cycle even after 6 hours, the concentration of hypochlorous acid water can be continuously adjusted within a range of a certain concentration or less without continuously increasing the concentration of hypochlorous acid water. That is, if the humidification purification operation is continued, the concentration of hypochlorous acid water in the mixing tank 2092 may excessively rise, but by providing control of the drainage judgment in accordance with the non-execution period by the second control, the concentration of hypochlorous acid water in the mixing tank 2092 can be reset at a constant interval, and further the additional amount of hypochlorous acid contained in the air 2009 of the discharge port 2003 can be reset, and the supply amount of hypochlorous acid gas to the indoor space 2018 can be controlled.

As described above, in the space purification system 2100, hypochlorous acid water is supplied into the mixing tank 2092 at intervals of a predetermined time (for example, 1 hour) as a first control, water supply processing is performed based on water level information (water shortage signal) from the water level sensor 2090 as a second control, and mixed water in the mixing tank 2092 is discharged during non-execution of the second control as a third control. Further, the air purification control unit 2041 of the space purification system 2100 makes the number of times the first control is performed in the predetermined period different from the number of times the second control is performed in the predetermined period, based on the humidification request amount (the humidification request amount corresponding to winter in japan or the humidification request amount corresponding to summer in japan) requested to the air purification unit 2011. As a result, in a state where the humidification demand is high as in winter in japan, air 2009 in a state where the hypochlorous acid amount is small in content can be released into the indoor space 2018 as compared with the conventional method, and in a state where the humidification demand is low as in summer in japan, air 2009 in a state where the hypochlorous acid amount is large in content can be released into the indoor space 2018 as compared with the conventional method. Further, when the humidification purification operation is continued for a long period of time, an excessive increase in the hypochlorous acid concentration released into the indoor space 2018 can be suppressed.

That is, by operating the supply of hypochlorous acid water, the supply of water, and the drainage of the mixed water by the independent trigger factors, the concentration of hypochlorous acid water (the concentration of hypochlorous acid contained in the air 2009 discharged to the indoor space 2018) in the mixing tank 2092 can be adjusted by simple control (first control, second control, third control).

As described above, according to the space purification system 2100 according to embodiment 3, the following effects can be obtained.

(1) The space purification system 2100 includes: hypochlorous acid water generating section 2030 for generating hypochlorous acid water; a hypochlorous acid water supply unit 2036 for supplying hypochlorous acid water from the hypochlorous acid water generation unit 2030 to the mixing tank 2092; a water supply unit 2050 for supplying water to the mixing tank 2092; a water level sensor 2090 for detecting the water level of the mixing tank 2092; an air cleaner 2011 for micronizing the mixed water of hypochlorous acid water and water stored in the mixing tank 2092 and releasing the micronized mixed water into the air; and an air purification control unit 2041 for controlling the supply process of the hypochlorous acid water supply unit 2036 and the water supply unit 2050, and the discharge process of the mixed water stored in the mixing tank 2092. The air purification control unit 2041 performs, as a supply process, a first control of supplying hypochlorous acid water by the hypochlorous acid water supply unit 2036 at predetermined intervals (for example, 60 minutes) and a second control of supplying water by the water supply unit 2050 based on information (water shortage information) on the water level of the mixing tank 2092 from the water level sensor 2090, and performs, as a drain process, a third control of draining mixed water stored in the mixing tank 2092 when the second control is not performed within a predetermined period (for example, 6 hours) after the water supply by the water supply unit 2050.

As a result, when the air having a relatively high humidity is ventilated as in summer in japan, the consumption of the mixed water stored in the mixing tank 2092 is small, and therefore, the frequency of supply of the hypochlorous acid water to the mixing tank 2092 (the number of times of performing the first control) increases, and the mixed water is pulverized and released into the air in a state where the hypochlorous acid concentration of the mixed water in the mixing tank 2092 is high. At this time, when the second control is not executed within a predetermined period (for example, 6 hours) after the water is supplied from the water supply portion 2050, the third control is executed to discharge the mixed water stored in the mixing tank 2092 and reset the mixed water in the mixing tank 2092, whereby an excessive increase in the hypochlorous acid concentration in the mixing tank 2092 can be suppressed. As a result, even in a situation where the hypochlorous acid water having been micronized is difficult to gasify, hypochlorous acid having a predetermined concentration can be contained in the air and released into the indoor space 2018.

On the other hand, when air having a relatively low humidity is ventilated as in winter in japan, the consumption of the mixed water stored in the mixing tank 2092 increases, and therefore the frequency of supplying water to the mixing tank 2092 (the number of times of performing the second control) increases, and the mixed water is pulverized and released into the air in a state where the hypochlorous acid concentration of the mixed water in the mixing tank 2092 is low. As a result, even in a case where the hypochlorous acid water having been pulverized is easily gasified, hypochlorous acid having a concentration as low as a predetermined concentration can be contained in the air and released into the indoor space 2018.

That is, in the space purification system 2100, the amount of hypochlorous acid released into the air can be easily adjusted.

(2) In the space purification system 2100, even when the operation is performed for a long period of time (for example, 24 hours), the state in the mixing tank 2092 can be returned to the operation-initial state before the hypochlorous acid water concentration in the mixing tank 2092 becomes excessively high. That is, the space purification system 2100 can easily adjust the amount of hypochlorous acid released into the air.

(3) In the space purification system 2100, the air purification control unit 2041 performs control such that the number of times the first control is performed is smaller than the number of times the second control is performed when the humidification demand for the air purification unit 2011 is equal to or greater than the first reference value during the supply process, and performs control such that the number of times the first control is performed is greater than the number of times the second control is performed when the humidification demand is smaller than the first reference value. Thus, in the space purification system 2100, in the case where the humidification demand is smaller than the first reference value during the supply process, the mixed water can be pulverized and released into the air in a state where the hypochlorous acid concentration in the mixing tank 2092 is high. On the other hand, when the humidification request amount is equal to or greater than the first reference value, the mixed water can be pulverized and released into the air in a state where the hypochlorous acid concentration in the mixing tank 2092 is low. That is, in the space purification system 2100, hypochlorous acid can be given to the air 2009 released from the air purification unit 2011 under conditions suitable for the environment of the indoor space 2018 based on the humidification demand.

The present disclosure is described above based on the embodiments. The embodiments are examples, and those skilled in the art will understand that various modifications can be made to the respective components or combinations of the respective processing procedures, and that these modifications are also within the scope of the present disclosure.

In the first, second, and third examples of the space purification system 2100 according to embodiment 3, the case where the air purification unit 2011 operates with a constant humidification request amount during the humidification purification operation time has been described, but in actuality, operates with a humidification request amount determined based on a humidity difference between the target humidity and the humidity of the air in the indoor space 2018 at regular intervals.

In the first, second, and third examples of the space purification system 2100 according to embodiment 3, the description has been given of the case where the timing of the water shortage detection and the timing of the supply of the hypochlorous acid aqueous stock solution overlap, but in reality, almost all cases are different from each other. In such a case, the air cleaning control unit 2041 does not immediately execute the third control when the non-execution period of the second control is the reference time (6 hours), but preferably executes the third control immediately before executing the first control. In this way, in the space purification system 2100, since the third control is not performed immediately after the hypochlorous acid is supplied to the mixing tank 2092 by the first control, the hypochlorous acid water supplied by the first control can be used continuously for the maximum extent, and waste caused by the draining in the third control can be reduced.

In the space purification system 2100 according to embodiment 3, the predetermined period is preferably set based on the concentration of hypochlorous acid water supplied by the first control. For example, in the space purification system 2100, when the concentration of hypochlorous acid water supplied by the first control is high, if the supply of water is not performed by the second control, the concentration of hypochlorous acid water in the mixing tank 2092 increases rapidly. Therefore, setting the predetermined period shorter can more reliably suppress an excessive increase in the concentration of hypochlorous acid water in the mixing tank 2092. On the other hand, in the space purification system 2100, when the concentration of hypochlorous acid water supplied by the first control is low, by setting the predetermined period longer, it is possible to reduce wasteful drainage of mixed water caused by the third control.

In the space purification system 2100 according to embodiment 3, after the mixed water in the mixing tank 2092 is discharged by any one of the water discharge controls (for example, the third control), the mixed water may be discharged without performing the water discharge of the mixed water at any time within 24 hours after that. By this, the mixed water in the mixing tank 2092 is reset, and an excessive increase in hypochlorous acid concentration in the mixing tank 2092 can be suppressed.

Industrial applicability

The space purification system according to the present disclosure is useful as a system for sterilizing or deodorizing air in a target space, in which the amount of hypochlorous acid released into the air can be easily adjusted when hypochlorous acid water is miniaturized and hypochlorous acid is released into the air.

Symbol description-

2 suction inlet

3 spray outlet

4 anterior segment wind path

5 middle section wind path

6 rear section wind path

8 air

9 air

10 space purifying device

11 air purifying part

11a humidifying motor

11b humidifying nozzle

13 blower

14 refrigerant coil

15 air conditioner

16 pipeline

16a indoor suction inlet

17 pipeline

17a indoor jet orifice

18 indoor space

20 outdoor unit

20a compressor

20b expander

20c outdoor heat exchanger

20d air supply fan

20e four-way valve

21 refrigerant circuit

24 pipeline

30 hypochlorous acid water generating unit

31 electrolytic cell

32 electrode

33 solenoid valve

34 brine tank

35 saline water delivery pump

36 hypochlorous acid water supply part

37 hypochlorous acid water delivery pump

38 water supply pipe

39 water level sensor

41 air purification control unit

41a input part

41b storage part

41c timing part

41d processing part

41e output part

42 air conditioning control unit

43 operating device

44 temperature and humidity sensor

50 water supply part

51 solenoid valve

52 water supply pipe

60 drain part

61 electromagnetic valve

62 water supply pipe

90 water level sensor

92 mixing tank

100 space purification system

1002 suction inlet

1003 spray outlet

1004 front section wind path

1005 middle section wind path

1006 rear section wind path

1008 air

1009 air

1010 space purifying device

1011 air purifying part

1011a humidifying motor

1011b humidifying nozzle

1013 blower

1014 refrigerant coil

1015 air conditioner

1016 pipeline

1016a indoor suction inlet

1017 pipeline

1017a indoor ejection port

1018 room space

1020 outdoor unit

1020a compressor

1020b expander

1020c outdoor heat exchanger

1020d air supply fan

1020e four-way valve

1021 refrigerant circuit

1024 pipeline

1030 hypochlorous acid water generating unit

1031 electrolytic cell

1032 electrode

1033 electromagnetic valve

1034 brine tank

1035 saline delivery pump

1036 hypochlorous acid water supply part

1037 hypochlorous acid water delivery pump

1038 water supply pipe

1039 water level sensor

1041 air purification control unit

1041a input part

1041b storage unit

1041c timing part

1041d processing unit

1041e output unit

1042 air conditioning control unit

1043 operating device

1044 temperature and humidity sensor

1050 water supply part

1051 electromagnetic valve

1052 water supply pipe

1060 drain part

1061 electromagnetic valve

1062 water supply pipe

1090 water level sensor

1092 mixing tank

1100 space purifying system

2002 suction inlet

2003 spray outlet

2004 front section wind path

2005 middle air path

2006 back section wind path

2008 air

2009 air

2010 space purifying device

2011 air cleaning unit

2011a humidifying motor

2011b humidifying nozzle

2013 blower

2014 refrigerant coil

2015 air conditioner

2016 pipe

2016a indoor suction inlet

2017 pipeline

2017a indoor jet port

2018 indoor space

2020 outdoor unit

2020a compressor

2020b expander

2020c outdoor heat exchanger

2020d air supply fan

2020e four-way valve

2021 refrigerant circuit

2024 pipeline

2030 hypochlorous acid water generating unit

2031 electrolytic tank

2032 electrode

2033 electromagnetic valve

2034 brine tank

2035 brine conveying pump

2036 hypochlorous acid water supply unit

2037 hypochlorous acid water delivery pump

2038 water supply pipe

2039 water level sensor

2041 air cleaning control unit

2041a input

2041b storage portion

2041c timing part

2041d processing part

2041e output part

2042 air conditioning control unit

2043 manipulation device

2044 temperature and humidity sensor

2050 water supply unit

2051 electromagnetic valve

2052 water supply pipe

2060 drain part

2061 solenoid valve

2062 water supply pipe

2090 water level sensor

2092 mixing tank

2100 spatial decontamination system.

Claims (12)

1. A space purification system is provided with:

a hypochlorous acid water generation unit for generating hypochlorous acid water;

A hypochlorous acid water supply unit configured to supply the hypochlorous acid water from the hypochlorous acid water supply unit to a mixing tank;

a water supply unit for supplying water to the mixing tank;

a water level sensor for detecting a water level of the mixing tank;

a humidification/purification unit configured to miniaturize the mixed water of the hypochlorous acid water and the water stored in the mixing tank and release the water into the air; and

a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank,

the control unit performs, as the water discharge process, a first control of supplying the hypochlorous acid water by the hypochlorous acid water supply unit at predetermined intervals, and a second control of supplying the water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, and performs a third control of discharging the mixed water stored in the mixing tank based on the accumulated humidification amount in the humidification purification unit.

2. The spatial purification system as set forth in claim 1, wherein,

the control unit executes the third control when the accumulated humidification amount is equal to or greater than a reference amount.

3. The spatial purification system as set forth in claim 2, wherein,

the accumulated humidification amount is calculated based on the number of times the first control and the second control are executed.

4. A space purification system as claimed in any one of claims 1 to 3, wherein,

the control unit executes the third control when the number of times the first control is executed is a reference number of times.

5. The spatial purification system as set forth in any one of claims 1 to 4, wherein,

the control portion executes the third control immediately before executing the first control or the second control.

6. The spatial purification system as set forth in any one of claims 1 to 5, wherein,

the control unit performs control such that the number of times the first control is performed is smaller than the number of times the second control is performed when the humidification demand required by the humidification purification unit is equal to or greater than a first reference value during the supply process, and performs control such that the number of times the first control is performed is greater than the number of times the second control is performed when the humidification demand is smaller than the first reference value.

7. A space purification system is provided with:

A hypochlorous acid water generation unit for generating hypochlorous acid water;

a hypochlorous acid water supply unit configured to supply the hypochlorous acid water from the hypochlorous acid water supply unit to a mixing tank;

a water supply unit for supplying water to the mixing tank;

a water level sensor for detecting a water level of the mixing tank;

a humidification/purification unit configured to miniaturize the mixed water of the hypochlorous acid water and the water stored in the mixing tank and release the water into the air; and

a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank,

the control unit executes, as the supply process, a first control of supplying the hypochlorous acid water by the hypochlorous acid water supply unit at predetermined intervals, and a second control of supplying the water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, respectively, and executes, as the drain process, a third control of draining the mixed water stored in the mixing tank when the first control is executed a predetermined number of times in succession.

8. The spatial purification system as set forth in claim 7, wherein,

The control unit executes the third control immediately before the first control is executed after the first control is executed continuously for the predetermined number of times.

9. The spatial purification system as set forth in claim 7 or 8, wherein,

the predetermined number of times in the third control is set based on the concentration of the hypochlorous acid water supplied by the first control.

10. A space purification system is provided with:

a hypochlorous acid water generation unit for generating hypochlorous acid water;

a hypochlorous acid water supply unit configured to supply the hypochlorous acid water from the hypochlorous acid water supply unit to a mixing tank;

a water supply unit for supplying water to the mixing tank;

a water level sensor for detecting a water level of the mixing tank;

a humidification/purification unit configured to miniaturize the mixed water of the hypochlorous acid water and the water stored in the mixing tank and release the water into the air; and

a control unit for controlling the hypochlorous acid water supply unit, the supply process in the water supply unit, and the drainage process of the mixed water stored in the mixing tank,

the control unit performs, as the water discharge process, a first control of supplying the hypochlorous acid water by the hypochlorous acid water supply unit at predetermined intervals and a second control of supplying the water by the water supply unit based on information on the water level of the mixing tank from the water level sensor, respectively, and performs a third control of discharging the mixed water stored in the mixing tank when the second control is not performed within a predetermined period after the water supply by the water supply unit.

11. The spatial purification system as set forth in claim 10 wherein,

the control portion executes the third control immediately before executing the first control.

12. The spatial purification system as set forth in claim 10 or 11, wherein,

the predetermined period is set based on the concentration of the hypochlorous acid water supplied by the first control.