LOW-HUMIDITY WORKING APPARATUS

摘要

A low-humidity working apparatus comprising a housing (8) forming a working chamber (9), a dehumidifier (18), and an air supply means, wherein the metal housing (8) is provided with a laterally elongated operating hole (30), a plurality of strip flexible sealing members are arranged close to each other and suspended in the operating hole (30), a laterally elongated window hole (31) is disposed close to and above the operating hole (30) and closed with a light-transmitting window plate. The dehumidifier (18) circulates the air in the working chamber (9) by sucking the air therefrom, cooling the sucked air by an evaporator (48) of a compression refrigerator (41), dehumidifying the cooled air by a dehumidifying agent-carrying dehumidifying rotor (61), and returning the low-humidity air from the dehumidifying rotor (61) to the working chamber (9). The air supply means supplies outside air to the dehumidifying rotor (61) via an evaporator (58) to maintain the positive air pressure in the working chamber (9) and prevent the outside air supplied through the operating hole (30) from being mixed in the air in the working chamber (9). Thus the operation is conducted at a high efficiency by inserting the hands from the operating hole (30) into the working chamber (9) the interior of which is maintained at a low humidity.