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为了获得稳定的常压气流,一般可采用排水取气法,而需使高位槽和贮气瓶的液面差保持恒定不变。要使液面差保持恒定,可采取如附图1所示的装置。若要连续不断的供气,可装置两套设备轮换使用。高位槽和贮气瓶为10立升(或20立升)的玻瓶。保持液面差恒定不变的条件应该是使产生虹吸现象的上液面和下液面分别固定:1.固定上液面的方法
In order to obtain a stable normal-pressure airflow, it is generally possible to use a drainage method, and it is necessary to keep the liquid level difference between the upper tank and the cylinder constant. To keep the liquid level constant, the device shown in FIG. 1 can be used. For continuous air supply, two sets of equipment can be used interchangeably. The troughs and cylinders are 10 liter (or 20 liter) vials. The conditions for maintaining the constant liquid level difference should be to make the upper and lower liquid surfaces that produce the siphon phenomenon fixed respectively: 1. The method of fixing the upper liquid surface