| 摘要 |
A beverage dispenser valve system in which the mixture ratio is controlled by continuous modulation of the solenoid valves. The solenoid valves have movable stop means (or push rods)- 38 that control the travel of the armature 26, which in turn controls the position of a needle valve 30 with respect to the valve seat 16 to gradually change the flow opening and thus the syrup and water flow rates. A microprocessor 68 uses the movable stop to adjust the syrup and/or water flow rate to deliver the proper ratio of syrup to water based on the flow of water and syrup as measured by flow meters 62, 64. In addition, the total flow rate from the nozzle can be controlled and varied in relation to the distance the cup lever arm 68 is depressed; thus, the flow rate can be made slow at the beginning and end, and fast in-between. |
