초록 ▼

A liquid chemical dispensing system for dispensing a plurality of liquid chemicals into a dishwasher includes at least a detergent pump and a rinse agent pump, a first switch indicating whether the dishwasher is a door type or a conveyor type dishwasher, a second switch indicating whether the contro

A liquid chemical dispensing system for dispensing a plurality of liquid chemicals into a dishwasher includes at least a detergent pump and a rinse agent pump, a first switch indicating whether the dishwasher is a door type or a conveyor type dishwasher, a second switch indicating whether the controller is in training mode or in run mode, a non-volatile memory and a data processor. The liquid chemical dispensing system is powered on whenever the dishwasher is spraying rinse water. In the training mode, the data processor enables a user to set values for a rinse run time parameter, a detergent run time parameter, and a rinse delay time, and stores those parameters in the non-volatile memory. In the run mode for door type dishwashers, each time the system is powered on the data processor runs the detergent pump a length of time corresponding to the stored detergent run time parameter, delays running the rinse pump, from the time of each power on, by an amount of time corresponding to the stored rinse delay time parameter, and then runs the rinse pump a length of time corresponding to the stored rinse run time parameter. In the run mode for conveyor type dishwashers, the data processor runs the rinse pump each time the system is powered on, and runs the detergent pump for N seconds for each M seconds that the rinse pump is run, where N is the detergent run time parameter and M is a predefined value.

대표청구항 ▼

A liquid chemical dispensing system for dispensing a plurality of liquid chemicals into a dishwasher having a wash tank, comprising: a plurality of pumps, including a detergent pump that pumps detergent into the wash water tank in said dishwasher and a rinse agent pump that pumps rinse agent into a

A liquid chemical dispensing system for dispensing a plurality of liquid chemicals into a dishwasher having a wash tank, comprising: a plurality of pumps, including a detergent pump that pumps detergent into the wash water tank in said dishwasher and a rinse agent pump that pumps rinse agent into a rinse water line in said dishwasher; a first switch indicating said dishwasher\s type, said first switch having a first position indicating said dishwasher is a door type dishwasher and a second position indicating said dishwasher is a conveyor type dishwasher; a second switch having a training mode position and run mode position; an electronic non-volatile memory; means for activating said system only when said dishwasher is spraying rinse water; data processing means coupled to said non-volatile memory, said plurality of pumps, and said first and second switches, for controlling operation of said plurality of pumps; said data processing means including: training mode means, enabled when said second switch is in the training mode position, for enabling a user to set values for a rinse run time parameter, a detergent run time parameter, and a rinse delay time and for storing said parameters in said non-volatile memory; door type run mode means, enabled when said second switch is in the run mode position and said first switch is in the first position, for running said detergent and rinse pumps each time said system is activated, including: (A) running said detergent pump a length of time corresponding to said detergent run time parameter, (B) delaying running said rinse pump, from the time of each activation of said system, by an amount of time corresponding to said rinse delay time parameter, and then (C) running said rinse pump a length of time corresponding to said rinse run time parameter; and conveyor type run mode means, enabled when said second switch is in the run mode position and said first switch is in the second position, for running said rinse pump each time said system is activated, and for running said detergent pump with an on/off duty cycle determined by said detergent run time parameter.