| 摘要 |
<p>The present invention relates to a device for preparing a cleaning liquid, a degreasing liquid or the like by mixing at least two liquids, for example water and a concentrate of cleaning or degreasing agent, with each other, The device comprises a mixing tank (2), a first conduit (8) connected with the tank for supplying the first liquid to the tank and a second conduit connected with the tank for supplying the second liquid to the tank. The device comprises first level sensor means (14) for sensing a lower liquid level in the tank and second level sensor means (16) for sensing an upper liquid level in the tank. A valve (18) is provided in the first conduit (8) for opening this conduit when the first level sensor means (14) senses that the lower liquid level has been reached and close the conduit (8) when the second level sensor means (16) senses that the upper liquid level has been reached. A metering device (20, 22) is adapted to supply to the tank (2) a controlled amount of the second liquid while the valve in the first conduit (8) is in its open position.</p> |
