FLUID DISPENSING SYSTEM

摘要

Post-mix soft drink dispensers for dispensing a mixture of carbonated water and flavored soft drink syrup in a prescribed mix ratio. Prior art devices have employed expensive and complex arrangements to compensate for pressure variations in the carbonated water supply line which causes a variance from the desired mix ratio. The present invention overcomes this deficiency by employing flow rate sensors which monitor the actual flow rate of the drink constituents and modulating the flow control valves based upon flow rates and the viscosity of the particular syrup. Separate syrup and water valves (13, 15) are modulated by a micro-processor control unit (27) which receives flow data from separate syrup and water flow meters (17, 19) and syrup viscosity data from a temperature sensing unit (85) and a syrup personality module. The apparatus is conveniently modified for use with different soft drink syrups by employing a separate removable personality module for each syrup, characterizing its prescribed mix ratio and its viscosity.