JP6572051B2 - Air cleaning device and operation method - Google Patents

Description

  The present invention relates to an air cleaning apparatus and a driving method having functions of sterilization, deodorization, dust removal, and gas removal.

  Conventionally, there exist some which are described in patent document 1, for example in an air purifying apparatus. This is because the sterilizing agent solution is sterilized by contacting gas and liquid with bacteria in the air, and the sterilization target air flows from the upstream side to the downstream side in the ventilation path of the housing, and the sterilization target air flows through the ventilation path. The spraying device sprays the disinfectant solution, receives the disinfectant solution descending from the ventilation path in the circulation tank, and supplies the disinfectant solution in the circulation tank to the spraying device. The circulation tank, the circulation system, the spraying device, and the aeration A slightly acidic electrolyzed water is supplied as a stock solution of a bactericidal agent solution from a drug supply device to a circulation system of a bactericide solution formed by a path, and dilution water for diluting the bactericide solution is supplied from a dilution water system. .

  Moreover, the thing of patent document 2 sprays the slightly acidic electrolyzed water as a disinfectant solution to the housing which has the ventilation path through which the sterilization object air flows from the upstream side to the downstream side, and the sterilization object air flowing through the ventilation path. A spraying device, a circulation tank for receiving the bactericide solution descending from the air passage, a circulation system for supplying the acidic water in the circulation tank to the spraying device, and a drug supply device for supplying the slightly acidic electrolytic water to the circulation tank And the medicine supply device has an external extraction part for extracting the slightly acidic electrolyzed water out of the housing.

JP2013-226373A JP2015-78785

  In the above Patent Documents 1 and 2, the chemical supply device supplies the diluting water to the circulation tank while supplying the slightly acidic electrolyzed water from the relay tank to the circulation tank at a small flow rate, and the effective chlorine of the bactericide solution in the circulation tank. The concentration is maintained at the set concentration of 0.1-10 mg / L, and the drug efficacy is maintained. Then, while continuously supplying the bactericide solution and dilution water to the circulation tank, the foreign matter transferred from the air to be sterilized into the bactericide solution is overflowed with the surplus of the bactericide solution at any time and discharged from the circulation tank. The cleanliness of the disinfectant solution in the circulation tank is maintained.

  A pump is required to discharge the germicide solution containing the overflowing foreign matter to the outside of the system. However, since the overflow is a small flow rate, it is not realistic to always drive the pump and continue to discharge it, and it is necessary to store it once in the discharge tank and transfer it with a pump in a timely manner before discharging it out of the system. For this reason, there has been a problem that the apparatus configuration becomes complicated and large.

  In addition, the circulation tank needs to be subjected to electrolytic water cleaning, that is, chemical cleaning by filling the tank with only the slightly acidic electrolyzed water of the concentration at the time of production without dilution at a frequency of once or more a day. However, there is no flow path for directly supplying the slightly acidic electrolyzed water of the stock solution to the circulation tank, and the slightly acidic electrolyzed water is supplied to the circulation tank through a relay tank with a small flow rate pump. It took a long time to fill with, and during that time it was necessary to stop the operation for air purification for a long time.

  The present invention solves the above-described problems, and provides an air cleaning device and an operation method capable of simplifying the device configuration by eliminating a drain tank and performing chemical cleaning in a short time.

  In order to solve the above-described problems, an air cleaning device of the present invention includes a housing having a purification ventilation path in which sterilization target air flows from the upstream side to the downstream side, and a sterilizing agent in the sterilization target air flowing in the purification ventilation path. A spray device for spraying the solution, a circulation tank for receiving the bactericide solution descending from the purification air passage, a circulation system for supplying the bactericide solution in the circulation tank to the spray device, and the bactericide solution in the circulation tank to the outside of the system A discharge system for discharging, a chemical supply system for supplying a sterilizing agent solution to the circulation tank, a diluting water supply system for supplying diluting water for diluting the sterilizing agent solution, and a control device are provided. The control device repeats batch operation with one cycle of the normal operation mode and the preparation operation mode as a normal operation In mode, stored in the circulation tank The fungicide solution is circulated between the circulation system, the spray device, the purification vent, and the circulation tank, and the bactericide solution is supplied from the replenishment supply unit to the circulation tank at a small replenishment flow rate to set the concentration of the bactericide solution. In the preparation operation mode, the old bactericidal solution in the circulation tank is discharged out of the system from the discharge system, the bactericide solution is supplied from the preparation supply unit at a large flow rate for preparation, and from the dilution water supply system. It is characterized by supplying dilution water and preparing a new disinfectant solution having a predetermined concentration in a circulation tank.

  In the air cleaning device of the present invention, the control device has a cleaning operation mode that is performed after performing a cycle of the normal operation mode and the preparation operation mode a plurality of times. In the cleaning operation mode, the old disinfectant solution in the circulation tank Is discharged from the discharge system to the outside of the system, the bactericide solution is supplied from the preparation supply unit to the circulation tank, and the circulation tank is filled with a predetermined amount of the bactericide solution, and the circulation tank is cleaned with chemicals.

  In the normal operation mode, the operation method of the air cleaning device of the present invention supplies the sterilizing agent solution stored in the circulation tank to the spraying device through the circulation system, and the sterilizing agent from the spraying device to the sterilization target air flowing through the purification air passage. Spraying the solution, receiving the bactericide solution descending from the purification air passage in the circulation tank and circulating the bactericide solution, supplying the bactericide solution from the replenishment supply unit to the circulation tank at a small flow rate for replenishment Maintain the set concentration of the agent solution, and in the preparation operation mode, discharge the old fungicide solution in the circulation tank out of the discharge system from the discharge system, supply the fungicide solution from the preparation supply unit at a large flow rate for preparation, It is characterized by supplying dilution water from a dilution water supply system, preparing a new disinfectant solution having a set concentration in a circulation tank in batches, and repeatedly performing a batch operation in which the normal operation mode and the preparation operation mode are one cycle. Do

  In the operation method of the air purifying apparatus of the present invention, the cleaning operation mode is performed after the cycle of the normal operation mode and the preparation operation mode is performed a plurality of times. In the cleaning operation mode, the old disinfectant solution in the circulation tank is discharged. The sterilizing agent solution is discharged from the system to the outside, supplied with a bactericide solution from the preparation supply unit to the circulation tank, filled with a predetermined amount of the bactericide solution in the circulation tank, and washed with chemicals.

  As described above, according to the present invention, the batch operation in which the normal operation mode and the preparation operation mode are set to one cycle is repeated, and in the normal operation mode, the disinfectant solution is maintained at the set concentration to maintain the efficacy, Bacteria that have migrated from the target air into the bactericide solution are sterilized, and foreign substances are retained in the circulation tank. Then, in the preparation operation mode, the old sterilizing agent solution is discharged together with the foreign matter, and the sterilizing agent solution in the circulation tank is updated to restore the cleanliness. Therefore, there is no overflow caused by continuously supplying the bactericidal solution and dilution water as in the past, and a drainage tank for temporary storage becomes unnecessary, and the entire amount of the old bactericidal solution in the circulation tank is once stored. It is possible to operate the pump with high operating efficiency.

  Also, when preparing the bactericide solution in the preparation operation mode, the bactericide solution is supplied from the preparation supply unit at a large flow rate for preparation, and the dilution water is supplied from the dilution water supply system and set in the circulation tank. Since a new bactericidal solution having a new concentration is prepared in batches, the bactericidal solution can be renewed in a short time.

  Furthermore, even in the cleaning operation mode, by supplying a bactericide solution from the preparation supply unit to the circulation tank at a large flow rate for preparation, the circulation tank is filled with a predetermined amount of the bactericide solution in a short period of time. Can be washed.

The front view which shows the typical structure of the air purifying apparatus in embodiment of this invention. Side view showing a schematic configuration of the air purifier The principal part enlarged view which shows the typical structure of the air purifying apparatus. Perspective view showing the air purifier The schematic diagram which shows the principal part of the air purifying apparatus in other embodiment of this invention. The enlarged view which shows the relay tank of the air purifying apparatus in the embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
As shown in FIG. 1 and FIG. 4, the air purifier has a lower air inlet 502 and an upper air supply port 503 in the door body 501 on the front surface of the housing 500. A purification air passage 52 is formed in which the bacteria target air 51 flows from the upstream intake port 502 to the downstream air supply port 503.

  In the middle of the purification air passage 52 of the housing 500, the first dustproof net 504, the medium performance filter 505, the medium 506, the spray device 53, and the eliminator are sequentially arranged from the upstream side to the downstream side in the flow direction of the sterilization target air 51. 507, a fan device 600, and a second dustproof net 508 are provided.

  The first dustproof net 504, the medium performance filter 505, and the medium 506 are attached to a wind tunnel 509 that forms a gas-liquid contact region of the purification ventilation path 52. The medium 506 is disposed in the wind tunnel 509 so as to be inclined obliquely downward from the air inlet 502 side toward the inner side of the housing 500, thereby suppressing the height required for the arrangement.

  The spraying device 53 sprays a bactericide solution of slightly acidic electrolyzed water along the medium 506 to the sterilization target air flowing through the purification air passage 52, and includes a plurality of spray nozzles 531. The spray nozzle 531 may be disposed obliquely downward, may be disposed upward, or the spray device 53 may be disposed at a position facing the medium 506.

  The definition of slightly acidic electrolyzed water here is “standards for food, additives, etc. (December 28, 1959, Ministry of Health, Labor and Welfare Notification No. 370)” and “April 26, 2012 Ministry of Health, Labor and Welfare Notification No. 345” The main active ingredient is hypochlorous acid (HCLO), an aqueous solution having a pH of 5.0-6.5 and an effective chlorine concentration of 10-80 mg / kg.

  The medium performance filter 505 captures fine particles and removes them from the air stream, and the medium 506 holds the spray water sprayed from the spraying device 53 and promotes gas-liquid contact between the sterilization target air and the bactericide solution. For example, a polyvinylidene chloride fiber is formed into a mat shape. The eliminator 507 captures water droplets and mist and removes them from the air stream, and is disposed above the wind tunnel 509 in which the media 506 is disposed.

  A pan 510 for receiving the bactericide solution descending from the wind tunnel 509 is disposed below the wind tunnel 509. The eliminator 507, the medium 506, the wind tunnel 509, and the pan 510 can be detached from the housing 500 during maintenance. Desorption is performed from the front side of the wind tunnel 509. Further, the spray state of the bactericide solution can be confirmed by lifting the eliminator 507 during operation.

  A circulation tank 54 is provided below the pan 510, and the circulation tank 54 receives and stores the bactericide solution descending from the purification vent 52 and the bactericide solution flowing from the pan 510. A relay tank 541 is provided inside the circulation tank 54, and a descending liquid guide plate 542 is provided to cover the relay tank 541.

A circulation system 55 is disposed between the circulation tank 54 and the spraying device 53, and the circulation system 55 has a circulation pump 550 and supplies the bactericide solution in the circulation tank 54 to the spraying device 53.
In the circulation system 55, a circulation pump 550 that serves both for spraying and discharging the bactericide solution is located below the circulation tank 54, and a three-way switching valve 551 and a check valve 552 are interposed on the downstream side of the circulation pump 550. A drainage system 567 branches from the three-way switching valve 551. By switching the three-way switching valve 551, it is possible to circulate and discharge the bactericide solution by using one circulation pump 550.

  Further, when the circulation pump 550 is stopped, the check valve 552 prevents backflow of the bactericide solution in the circulation system 55. Therefore, if the spray nozzle 531 of the spray device 53 is arranged facing upward, the circulation pump 550 is circulated when the circulation pump 550 is stopped. The inside of the system 55 is filled with the bactericide solution, and no abnormal noise is generated due to the discharge of air when the circulation pump 550 is restarted.

  A chemical supply system 56 that supplies slightly acidic electrolyzed water that is a bactericide solution of a stock solution having a concentration at the time of generation includes a generating device 561 that generates slightly acidic electrolyzed water, a water supply system 562 that supplies water to the generating device 561, and a water supply system 562. The diluting water supply system 563 that branches from the diluting water to the circulation tank 54, the relay tank 541 described above, and the slightly acidic electrolyzed water from the generator 561 through the relay tank 541 and the relay tank 541 circulates the circulation tank. A supply unit for supply 564 provided with a supply unit for preparation 564 supplied at a high flow rate for preparation 54 and a relay pump 565 for supplying slightly acidic electrolyzed water dropwise from the relay tank 541 to the circulation tank 54 at a low flow rate for supply. 566.

  The relay tank 541 has a bottom surface that is inclined downward from one side edge 541a corresponding to the opening 564a of the preparation supply unit 564 toward the other side edge 541b and then inclined upward through the bottom portion 541c. The other side edge 541b is at a lower position than the one side edge 541a, forms an overflow edge, and the supply part 566 for supply is connected to the lowest part 541c.

  In the present embodiment, the relay tank 541 is disposed inside the circulation tank 54, but can be disposed outside the circulation tank 54. However, if the relay tank 541 is disposed outside the circulation tank 54, it is necessary to separately provide a waterproof pan or the like for preventing water leakage. By disposing the relay tank 541 inside the circulation tank 54 as in the present embodiment, a component member for countermeasures against water leakage becomes unnecessary.

  The dispensing supply portion 564 is provided with a three-way switching valve 564b, and an external extraction portion 564c branches from the three-way switching valve 564b. A water supply port 564d of the external extraction portion 564c is provided on the side of the housing 500. is there.

  Inside the circulation tank 54, a lower limit liquid level meter 54a, a middle level liquid level meter 54b, and an upper limit liquid level meter 54c are provided at positions corresponding to the respective set liquid levels. A control device 700 is provided on the front surface of the door body 501 to take charge of the operation of the air purifier.

  The control device 700 has functional circuits responsible for the normal operation mode, the preparation operation mode, and the cleaning operation mode, and repeats the batch operation in which the normal operation mode and the preparation operation mode are one cycle, and the normal operation mode and the preparation operation are repeated. After the cycle with the mode is performed a plurality of times, the cleaning operation mode is performed.

In the present embodiment, the normal operation mode is about 20-40 minutes, the preparation operation mode is about 65 seconds including the drainage time, and the cleaning operation mode is performed at a frequency of once or more per day.
The operation of the above configuration will be described below.
(Normal operation mode)
The medicine supply device 56 supplies the slightly acidic electrolyzed water dropwise by the relay pump 565 from the relay tank 541 to the circulation tank 54 via the supply section 566 for supply, for example, 0.05 L / min. The effective chlorine concentration of the bactericide solution in the circulation tank 54 is maintained at 0.1-10 mg / L, and the bactericide solution in the circulation tank 54 is maintained at a dilution concentration suitable for sterilization.

  In this state, the sterilizing solution in the circulation tank 54 is supplied to the spraying device 53 by the circulation pump 550, and the sterilization target air 51 flowing from the upstream side to the downstream side through the purification air passage 52 of the housing 500 is supplied to the sterilization target air 51. The disinfectant solution whose concentration is adjusted in the circulation tank 54 is sprayed from the spray nozzle 531. The liquid level in the tank is maintained between the middle set level of the middle liquid level meter 54b and the high level set level of the upper limit liquid level meter 54a, and as necessary to compensate for the loss lost by spraying. Dilution water is supplied from the dilution water supply system 563. The supply amount is supplied at a ratio of bactericide solution: water for dilution = 1: 9.

  By this spraying, foreign matters such as airborne bacteria and dust contained in the sterilization target air 51 collide with the spray water of the sprayed disinfectant solution, and are captured and sterilized. Furthermore, the spray water of the bactericide solution that has reached the medium 506 causes the floating bacteria and dust attached to the medium 506 to flow down, and takes in foreign matters such as the floating bacteria and dust contained in the sterilization target air 51, and the circulation tank 54. Flows in.

  In the circulation tank 54, slightly acidic electrolyzed water is dropped at a small flow rate for replenishment, and the effective chlorine concentration of the bactericide solution in the tank of the circulation tank 54 is maintained at a dilution concentration suitable for sterilization of 0.1-10 mg / L. Therefore, the bacteria flowing into the circulation tank 54 can be surely sterilized. Further, by spraying the bactericide solution directly on the sterilization target air 51 with high saturation efficiency, foreign substances such as floating bacteria and dust contained in the sterilization target air 51 can be taken into the bactericide solution, In addition to sterilization, dust removal can also be realized.

The sterilized air that has passed through the medium 506 passes through the eliminator 507 and is supplied into the room by the fan device 600.
(Preparation operation mode)
The three-way switching valve 551 is operated to discharge the old disinfectant solution in the circulation tank 54 from the discharge system 567 to the outside by the circulation pump, and lower the liquid level in the circulation tank 54 to the lower set level of the lower limit liquid level meter 54a. .

  Next, in a state where the three-way switching valve 551 is returned and the circulation system 55 is connected to the spraying device 53, the medicine supply system 56 supplies water to the generating device 561 from the water supply system 562, and the generating device 561 uses 2-21% hydrochloric acid. The electrolyzed water is electrolyzed to produce slightly acidic electrolyzed water, and the slightly acidic electrolyzed water at the production concentration is used as a bactericide solution through the preparation supply unit 564 to the relay tank 541 with a large flow rate for preparation, for example, 5 L / Supply in minutes.

  The bactericide solution flowing into the relay tank 541 from the opening 564a of the preparation supply unit 564 flows from the one side edge 541a toward the other side edge 541b, and the foreign substance derived from tap water remaining in the relay tank 541 is washed away. It flows from 541b and is supplied to the circulation tank 54.

  Simultaneously with the supply of the bactericide solution at the production concentration, dilution water is supplied from the dilution water supply system 563 to the circulation tank 54 at a rate of, for example, 6 L / min. The supply amount is supplied at a ratio of bactericidal solution: dilution water = 1: 9, and a new bactericidal solution having a set concentration, that is, an effective chlorine concentration of the bactericide solution of 0.1-10 mg / L, is fed to the circulation tank 54. The bactericide solution is prepared and stored in the circulation tank 54 up to the upper set level of the upper limit liquid level meter 54c.

  In this way, in the preparation operation mode, the bactericide solution is supplied from the preparation supply unit 564 at a large flow rate for preparation, and the dilution water is supplied from the dilution water supply system 563, so that the bactericide solution can be updated in a short time. It can be performed.

Further, in the normal operation mode, the sterilant solution is maintained at the set concentration and the medicinal effect is maintained, and the foreign matters transferred from the sterilization target air into the sterilizer solution are retained in the circulation tank. Since the disinfectant solution is discharged and the disinfectant solution in the circulation tank is renewed to restore the cleanliness, there is no overflow caused by continuously supplying the disinfectant solution and dilution water as in the past, A drainage tank for temporary storage becomes unnecessary, and the pump can be operated with high operation efficiency by discharging the entire amount of the old disinfectant solution inside the circulation tank 54 at a time.
(Washing operation mode)
In the cleaning operation mode, the three-way switching valve 551 is operated, the old bactericide solution in the circulation tank 54 is discharged from the discharge system 567 to the outside by the circulation pump, and the bactericide solution is supplied from the preparation supply unit 564 to the circulation tank 54. Then, the circulation tank 54 is filled with a predetermined amount of the bactericidal agent solution, and the circulation tank 54 is cleaned with chemicals.

Even in this cleaning operation mode, the bactericidal solution is supplied from the preparation supply unit 564 to the circulation tank 54 at a large flow rate for preparation, so that a predetermined amount of the bactericide solution is filled in the circulation tank 54 and circulated in a short time. The tank 54 can be cleaned with chemicals.
(Removal of slightly acidic electrolyzed water)
When taking out the slightly acidic electrolyzed water from the air cleaning device, the three-way switching valve 564b is operated to connect the dispensing supply unit 564 to the external takeout unit 564c, and the slightly acidic electrolyzed water is taken out from the water supply port 564d.
(Embodiment 2)
In the first embodiment, the bactericide solution is caused to flow into the circulation tank 54 from the other side edge 541 b that forms the overflow port of the relay tank 541. It is also possible to adopt the following configuration instead of this configuration.

  As shown in FIGS. 5 and 6, the overflow pipe 591 is disposed through the bottom of the relay tank 541, the upper end opening 591 a of the overflow pipe 591 is opened near the water surface of the relay tank 541, and is used as an overflow port, The lower end opening 591b is opened below the lower set level of the circulation tank 54. And the opening 564e of the supply part 564 for dispensing is arrange | positioned under the water surface of the relay tank 541. FIG.

  With this configuration, when the old sterilant solution in the circulation tank 54 is discharged and then the sterilant solution having the production concentration is supplied to the circulation tank 54, the sterilizer solution in the relay tank 541 flows down to the circulation tank 54 through the overflow pipe 591. Since it flows out below the lower set level water surface, the bactericidal agent solution does not hit the water surface inside the circulation tank 54, and the generation of the sound of the impact can be prevented. Similarly, since the bactericidal solution flowing down from the dispensing supply unit 564 to the relay tank 541 flows out below the water surface of the relay tank 541, the bactericidal solution does not hit the water surface of the relay tank 541, and the water noise of the impact is reduced. Occurrence can be prevented.

Further, the opening 564e of the dispensing supply unit 564 opens toward the bottom in the vicinity of the bottom of the relay tank 541, so that the content derived from the supply water staying at the bottom of the relay tank 541 is ejected from the opening 564e. It can be rolled up with a solution, and the contents derived from the supply water can be discharged together with the bactericide solution to the circulation tank 54 through the overflow pipe 591, and the relay tank 541 can be cleaned each time the preparation operation mode and the cleaning operation mode are performed.
(Embodiment 3)
Further, when the relay tank 541 is disposed outside the circulation tank 54, the other side edge 541b, which is an overflow edge, is disposed inside the circulation tank 54, and in the preparation operation mode and the cleaning operation mode, the concentration at the time of generation is determined. Slightly acidic electrolyzed water is supplied as a bactericide solution through the preparation supply unit 564 to the relay tank 541 at a large preparation flow rate. In the normal operation mode, the slightly acidic electrolyzed water is dropped and supplied from the relay tank 541 to the circulation tank 54 via the supply unit 566 by the relay pump 565 at a small flow rate for replenishment. Maintain the chlorine concentration at 0.1-10 mg / L.

51 Air to be sterilized 52 Purifying air passage 53 Spraying device 54 Circulating tank 54a Lower liquid level meter 54b Middle liquid level meter 54c Upper liquid level meter 55 Circulating system 56 Drug supply system 500 Housing 501 Door body 502 Inlet 503 Air supply Mouth 504 First dustproof net 505 Medium performance filter 506 Media 507 Eliminator 508 Second dustproof net 509 Wind tunnel 531 Spray nozzle 510 Pan 541 Relay tank 541a One side edge 541b Other side edge 541c Bottom part 542 Falling liquid guide plate 551 Three-way circulation pump 551 Switching valve 552 Check valve 561 Generator 562 Water supply system 563 Dilution water supply system 564 Preparation supply unit 564a Opening 564b Three-way switching valve 564c External extraction unit 564d Water supply port 564e Opening 565 Relay pump 566 Replenishment supply unit 567 Discharge system 591 Overflow pipe 591a Upper end opening 591b Lower end opening 600 Fan device 700 Control device

Claims (4)

A housing having a purification ventilation path in which the air to be sterilized flows from the upstream side to the downstream side, a spraying device for spraying a sterilizing agent solution to the air to be sterilized flowing in the purification path, and a sterilization descending from the purification ventilation path A circulation tank for receiving the sterilant solution, a circulation system for supplying the sterilizer solution in the circulation tank to the spraying device, a discharge system for discharging the sterilant solution in the circulation tank out of the system, and a medicine for supplying the sterilant solution to the circulation tank A supply system, a dilution water supply system for supplying dilution water for diluting the bactericide solution, and a control device;
The drug supply system has two supply parts, a supply part for preparation and a supply part for replenishment, which supply the bactericide solution to the circulation tank,
The control device repeatedly performs batch operation in which the normal operation mode and the preparation operation mode are one cycle,
In the normal operation mode, the sterilizer solution stored in the circulation tank is circulated between the circulation system, the spray device, the purification air passage, and the circulation tank, and the sterilizer solution is circulated at a small supply flow rate from the replenishment supply unit. To maintain the set concentration of the disinfectant solution,
In the preparation operation mode, the old bactericidal solution in the circulation tank is discharged out of the system from the discharge system, the bactericide solution is supplied from the preparation supply unit at a large flow rate for preparation, and the dilution water is supplied from the dilution water supply system. Then, a new disinfectant solution having a set concentration is batch-prepared in the circulation tank, and the air purifying apparatus is characterized. The control device has a cleaning operation mode to be performed after performing a cycle of the normal operation mode and the preparation operation mode a plurality of times,
In the washing operation mode, the old bactericidal solution in the circulation tank is discharged from the discharge system to the outside, the bactericide solution is supplied from the preparation supply unit to the circulation tank, and the circulation tank is filled with a predetermined amount of the bactericide solution. The air cleaning apparatus according to claim 1, wherein the circulation tank is cleaned with chemicals. In normal operation mode, the bactericidal solution stored in the circulation tank is supplied to the spraying device through the circulation system, sprayed with the bactericidal solution from the spraying device to the sterilization target air flowing through the purification ventilation path, and descended from the purification ventilation path. While receiving the bactericidal solution to be circulated in the circulation tank and supplying the bactericide solution from the replenishment supply unit to the circulation tank at a small flow rate for replenishment, the set concentration of the bactericide solution is maintained,
In the preparation operation mode, the old bactericide solution in the circulation tank is discharged out of the system from the discharge system, the bactericide solution is supplied from the preparation supply unit at a large flow rate for preparation, and the dilution water is supplied from the dilution water supply system. Then prepare a new disinfectant solution with a set concentration in the circulation tank,
An operation method of an air cleaning device, wherein a batch operation in which a normal operation mode and a preparation operation mode are one cycle is repeatedly performed. After performing the cycle of normal operation mode and preparation operation mode multiple times, carry out the cleaning operation mode,
In the washing operation mode, the old bactericidal solution in the circulation tank is discharged from the discharge system to the outside, the bactericide solution is supplied from the preparation supply unit to the circulation tank, and the circulation tank is filled with a predetermined amount of the bactericide solution. 4. The method of operating the air purifier according to claim 3, wherein the circulation tank is cleaned with chemicals.

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