JPS6463087A - Air shower apparatus - Google Patents

Abstract

PURPOSE: To decrease the number of the use machines to be built into a device in terms of equipment and to reduce the size over the entire part of the device by changing over and controlling the running speed of a fan in correspondence to the stationary state at the time of passing through the human body and object in a passage and at the time of non-passage. CONSTITUTION: This air shower device is installed in an inlet passage communicating with a clean room and has a function to flow off the dust adhered to the surfaces of the human bodies and objects passing this passage and a function to clean and maintain the air in the passage at the stationary time. A side part wind tunnel 3 delineated alongside the passage 1 across return air flow suction ports 6 opened in the lower part of the passage 1 and jet air flow ejection ports 5 is internally provided with a fan 14 which may be run by changing over to high and low speeds and an HEPA filter 9. Further, the upper wind tunnel 4 delineated on a ceiling side inclusive of a circulating air flow blow-off port 7 and the side part wind tunnel 3 communicate with each other and an air damper 15 which operates to be closed at the time of the high speed running of the fan 14 and to be opened at the time of the low speed running is disposed at the communicating points between the wind tunnels. Consequently, the size over the entire part of the device is reduced.