A liquid atomization device includes: an inlet; an outlet; and a liquid atomization chamber. The liquid atomization chamber is provided in an air passage between the inlet and the outlet. The liquid atomization chamber includes a rotary shaft, a pumping pipe, a collision wall, a reservoir, and a drain port. The rotary shaft is rotated by a rotary motor and is disposed in the vertical direction. The pumping pipe includes a lower portion having a pumping port and an upper portion fixed to the rotary shaft, and is rotated in coordination with rotation of the rotary shaft to pump up water through the pumping port and centrifugally discharge the water. The pumping pipe generates, inside the pumping pipe, a whirlpool in the water in the reservoir by the rotation, and forms, at the center of the whirlpool, a void providing communication between the pumping port and the drain port.

To sterilize a sterilization filter unit with heated steam, minimize the heat load on the sterilization filter unit and extend the service life of the sterilization filter unit.

Heated steam is supplied to a sterilization filter unit that sterilizes supplied air, the temperature of the heated steam discharged from the sterilization filter unit is measured at predetermined time intervals, the F value is calculated from the measured temperature, and sterilization of the sterilization filter unit is ended when the F value reaches a target value.

Space cleaning device includes: hypochlorous acid water generator; mixing bath storing a mixture of the hypochlorous acid water and water; hypochlorous acid water supply unit; water supply unit; water level sensor detecting a water level of the water mixture; humidifying purifier micronizing the water mixture and releases the water mixture micronized into air; and control unit controlling operations of hypochlorous acid water supply unit and water supply unit. Control unit is configured, after supplying the hypochlorous acid water and the water to fill mixing bath with the water mixture, controls an operation of hypochlorous acid water supply unit to supply a predetermined amount of the hypochlorous acid water to mixing bath once in every predetermined time period, and controls an operation of water supply unit to supply the water to mixing bath based on information related to the water level of the water mixture received from water level sensor.

There is disclosed herein a system for sanitising a fluid pathway in a drinking water dispensing assembly, the system including: a supply of water to be delivered under pressure through the fluid pathway; and a sanitising solution to be dispensed into the fluid pathway via a flow restrictor, wherein the flow restrictor is configured to regulate the flow rate of the solution delivered to the fluid pathway to facilitate mixing between the water and the solution to an effective sanitising concentration within the fluid pathway.

A method for treating foul odors. A chemical solution is administered to the area to be treated. The chemical solution includes: potassium iodine, zinc sulfate and magnesium sulfate. In a preferred embodiment the chemical solution is diluted in water and applied to an area needing treatment.

Methods and apparatuses that enable the production of aqueous halogen solutions with controlled pH values are disclosed. The disclosed methods include introducing acids into a halide-based brine, the electrolysis of which results in the production of an aqueous halogen solution product with a desired pH value, also preventing the pH of the product from reaching an undesired value. The disclosed technology can also utilize sensors and a control system utilizing telemetry from these sensors to ensure that the desired aqueous halogen solution is produced.

Space purification system includes: hypochlorous acid water supplier that supplies hypochlorous acid water to mixing tank; water supplier that supplies water to mixing tank; water level sensor that detects a water level of mixing tank; air purifier that micronizes and releases, into air, mixed water of the hypochlorous acid water and the water stored in mixing tank; and air purification control unit that controls supply treatment and drainage treatment of the mixed water. Air purification control unit (i) executes first control of causing hypochlorous acid water supplier to perform supply of the hypochlorous acid water at predetermined time intervals, and second control of causing water supplier to perform supply of water based on information regarding the water level of mixing tank from water level sensor, and (ii) executes, as the control of the drainage treatment, third control of causing the mixing tank to drain the mixed water stored in mixing tank based on an integrated humidification amount in air purifier.

Space purification device (1000) of the present disclosure includes an electrolytic bath, electrode part (210), a mixing bath, hypochlorous acid water supply part (228), water supply part (138), an air blower, purification part (310), and controller (500). Controller (500) includes count part (550) that counts an elapsed time from timing at which generation of hypochlorous acid water of a first concentration in the electrolytic bath is completed, and calculation part (560) that calculates, based on a count time counted by count part (550), a concentration decrease value indicating how much the first concentration of the hypochlorous acid water in the electrolytic bath is decreased. Controller (500) is configured to adjust a supply amount of hypochlorous acid water to be supplied from hypochlorous acid water supply part (228) based on the concentration decrease value.

A method of cleaning and disinfecting a surface comprises producing a diluted cleaning disinfectant solution from a concentrated cleaning disinfectant solution, and contacting the surface with the diluted solution. A concentrated cleaning disinfectant solution is stable at freezing temperatures and comprises antimicrobial acid, surface cleaning acid, solubilizing agent, hydrotrope, and surfactant. The antimicrobial acid comprises a synergistic combination of (i) salicylic acid, derivative of salicylic acid, or a combination thereof, and (ii) gluconic acid, derivative of salicylic acid, or a combination thereof. The surface cleaning acid comprises at least one acid selected from mineral acid, methane sulfonic acid, formic acid, or sulfonic acid having an alkyl group with no greater than three carbon atoms. The surfactant selected from anionic surfactant, non-ionic surfactant, or a mixture thereof.

An air treatment system, e.g., used in a PPE mask, contains media with an infectious agent attenuator that attenuates or inactivates infectious agents in air flowing through passages in a media, the attenuator composed of moisture-activated biocide, e.g., organic acid like citric acid, and a humectant, e.g., gelling humectant like sorbitol, which captures moisture from the air to maintain biocide activation. A surfactant, such as a rhamnolipid surfactant, which attracts and encapsulates infectious agents in the air can be included. The attenuator has a pH5, preferably 4, more preferably 3.5, is kept activated at or below the desired pH by humectant capturing moisture in the breath of a person wearing a mask with the media. A preferred biocide is composed of a solution containing about 88% water and 12% of a mixture that is at least 80% citric acid and no more than 20% sorbitol.