JPS6415938A - Changer for gas flow - Google Patents

Abstract

PURPOSE:To change over gases easily without respectively making the pressure of a plurality of gases to be changed over to differ by clogging the other gas introducing pipe by a gas movement stopping member and flowing gases in the direction of a gas leading-out pipe only from one gas introducing pipe. CONSTITUTION:A stopping-member housing chamber 22, which is communicated with a plurality of gas introducing pipes 10, 11 and in which a gas movement stopping member 21 is stored and the stopping member 21 can be shifted vertically by a gas flow, is installed, a communicating pipe 23 opening to the housing chambers 22 is mounted at approximately the central section of the housing chambers 22, and a gas leading-out pipe 24 is branched and connected to the communicating pipe 23. A motor-operated valve 7 set up to a gas piping 6 for an evaporator 4 communicating with the gas introducing pipe 10 is brought to an OFF state, and a motor-operated valve 9 fitted to a gas piping 9 for an evaporator 5 communicating with the gas introducing pipe 11 is brought to an ON state. Accordingly, the stopping member 21 is positioned on the bottom of the housing chamber 22 because a gas is not flowed through the gas introducing pipe 10, the stopping member 21 is moved to the top section of the housing chamber 22 because the gas is flowed through the gas introducing pipe 11, and dimethylcadmium gas in the gas introducing pipe 11 is flowed through the gas leading-out pipe 24 through the communicating pipe 23.