Patent ID: 8808621

Claim:
An endoscope processing apparatus comprising; a liquid mixing apparatus for mixing a plurality of liquids, the liquid mixing apparatus comprising: a first tank; a first liquid level sensor provided inside the first tank; a second liquid level sensor provided inside the first tank, the second liquid level sensor detecting a liquid level higher than a liquid level that the first liquid sensor detects; a first introduction section that introduces a first liquid into the first tank; a second introduction section that introduces a second liquid into the first tank; a first opening portion that is provided above a highest liquid level of the first tank; a second tank; a third liquid level sensor provided inside the second tank; a fourth liquid level sensor provided inside the second tank, the fourth liquid level sensor detecting a liquid level higher than a liquid level that the third liquid sensor detects; a third introduction section that introduces a third liquid into the second tank; a second opening portion that is provided above a highest liquid level of the second tank; a liquid transfer conduit having one end arranged below a lowest liquid level in the first tank and another end connected to the second tank; an opening/closing valve that is provided in the liquid transfer conduit; a gas transfer conduit having one end arranged above the highest liquid level in the first tank and another end arranged above the highest liquid level in the second tank; a pump capable of forward/reverse operation that is provided in the gas transfer conduit and that can transfer a gas in two directions inside the gas transfer conduit; and an atmospheric release control section that controls opening and closing of the first opening portion and the second opening portion; a processing tank adapted to hold the endoscope and operably connected to the second tank; and a control section that is operably connected to the first liquid level sensor, the second liquid level sensor, the third liquid level sensor, the fourth liquid level sensor, the first introduction section, the second introduction section, the pump capable of forward/reverse operation and the atmospheric release control section, and controls the first introduction section, the second introduction section, the pump capable of forward/reverse operation and the atmospheric release control section based on a detection result of one or more of the first liquid level sensor, the second liquid level sensor, the third liquid level sensor and the fourth liquid level sensor.