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    • 8. 发明授权
    • Pressure-controlling apparatus employed in pre-chamber of environmental
testing chamber for self-propelled vehicle
    • 用于自行车的环境试验箱前置室的压力控制装置
    • US4847790A
    • 1989-07-11
    • US23482
    • 1987-03-09
    • Nobuo SuzukiIkuhide OtaMasanobu Ishii
    • Nobuo SuzukiIkuhide OtaMasanobu Ishii
    • G01M99/00G01M9/04G01M17/007G01N17/00
    • G01M9/04G01M17/007
    • In a pressure-controlling apparatus employed in a pre-chamber of an environmental testing chamber for a self-propelled vehicle, in which testing chamber various tests are conducted under a subatmospheric pressure, which testing chamber is provided with the pre-chamber for permitting an opertor's getting in/out of the testing chamber, the improvement resides in that: operational switch means provided in the pre-chamber permit the operator to open/close a first and a second opening/closing valves, which first opening/closing valve is provided in a first air-duct which opens into open air at one end and into said pre-chamber at the other end for recovering an air-pressure of the pre-chamber, which second opening/closing valve is provided in a second air-duct which opens into the testing chamber at one end and into the pre-chamber at the other end for reducing the air-pressure of the pre-chamber.
    • 在用于自推进车辆的环境试验室的预制室中的压力控制装置中,其中测试室在低于大气压的压力下进行各种试验,该试验室设有预制室,以允许 操作员进出测试室的改进在于:在预制室中设置的操作开关装置允许操作者打开/关闭第一和第二打开/关闭阀,该第一和第二打开/关闭阀被提供 在第一空气管道中,该第一风管在另一端在一端敞开到空气中,并在另一端开口用于回收前室的空气压力,该第二开/关阀设置在第二风管 其一端在测试室中开口并进入另一端的预制室,以减小预制室的空气压力。