Koken Ltd.

Hironobu Takeuchi

Takeshi Honda

Shingo Ishikawa

Gaku Sasaki

An air cleaning apparatus capable of predicting a breakthrough time of a filtering portion is provided. Regarding a maskas one example of the air cleaning apparatus, data on concentration of the poisonous gas element with which in ambient air () is contaminated on the upstream side of a filtering portion (), a flow rate of the air () passing through the filtering portion (), a temperature of the air (), and relative humidity of the air () are input to an arithmetic processing unit (). A breakthrough-time prediction formula in which the concentration, the flow rate, the temperature, and the relative humidity are provided as variables is programmed in the arithmetic processing unit (), and the breakthrough time of the filtering portion () is calculated through the prediction formula, based on the data on the concentration and the like.

Air cleaning apparatus and method for predicting breakthrough time for the same

A supply valve for supplying air to a wearer of an air respirator is attached to a facepiece and includes an inflow port for medium-pressure air (S), a supply port for the medium-pressure air (S) with respect to the facepiece, and a diaphragm. The supply valve includes a cylindrical housing and a slider that is reciprocally slidable on the inner peripheral surface of the housing in an axial direction thereof. The housing includes a pilot valve seat urged toward a pilot valve on an outer side of the one end portion in the axial direction and a main valve seat on an inner side of an opposite end portion in the axial direction. The inflow port is formed between the one end portion and the opposite end portion. The slider includes the pilot valve contactable with the pilot valve seat and a main valve urged toward the main valve seat.

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Tokyo, Japan

Hironobu Takeuchi