Patent ID: 8622605
Filing Date: 2014-01-07
Classification: B01F,Y10T

Abstract:
1. A fluid mixing device comprising: a mixing tank for mixing at least two liquids; a plurality of supply tanks, one of which supply tanks is provided for each of said at least two liquids and supplies each of said liquids to the mixing tank; mixing tank flow channels, each of which mixing tank flow channels connects a corresponding supply tank to the mixing tank; a valve arranged in each of the mixing tank flow channels; branch flow channels, each of which branch flow channels is connected to a corresponding mixing tank flow channel; and flow channel selection mechanisms respectively provided at a portion where each of the branch flow channels is connected to a corresponding one of the mixing tank flow channels, wherein each of the branch flow channels is connected from the flow channel selection mechanism in one of the mixing tank flow channels to the valve in another of the mixing tank flow channels, wherein in a case where pressure of the liquid supplied from one of the supply tanks does not reach a specified pressure, the flow channel selection mechanism, associated with the one supply tank, limits a flow of the liquid supplied from the one supply tank to a direction of the branch flow channels, and in a case where pressure of the liquid supplied from the one supply tank exceeds the specified pressure, the flow channel selection mechanism, associated with the one supply tank, allows a flow of the liquid supplied from the one supply tank also to a direction of the mixing tank via the corresponding mixing tank flow channel, and wherein when each valve has pressure applied thereto from the liquid passing through a corresponding one of the branch flow channels, the valve closes the corresponding mixing tank flow channel.