| 摘要 |
PURPOSE:To enable the reliable maintenance of a liquid surface level in a liquid tank, by installing a ventilating tube extending from the inside of a liquid supply tank to a given position in the liquid tank connected to the lower part thereof. CONSTITUTION:A liquid supply tank 2 is mounted to a liquid tank 1, and a position of a ventilating tube 3 is adjusted so that the tip of the ventilating tube 3 is positioned in a required liquid surface level in the liquid tank 1. In that case, if a space is formed between the tip of the ventilating tube 3 and a liquid surface 11 in the liquid tank 1, air at the inside of the liquid tank 1 passes through the tip of the ventilating tube 3 to enter a space 5 in the liquid supply tank 2 through aperture 4, and a difference in pressure is produced between the inside of the liquid tank 1 and the inside of the liquid supply tank 2. This causes supplying of liquid in the liquid supply tank 2 to the liquid tank 1 after passing through a narrow gap btween a vent hole 6 and the ventilating tube 3. |
