Time-based multi-mode pump control

摘要

Times of at least one of on cycles and off cycles of a pump operating in one of a sub-pump mode and a continuous pumping mode are monitored. A determination is made as to whether to switch the pump from the one of the sub-pump mode and the continuous pumping mode to the other of the sub-pump mode and the continuous pumping mode based upon the monitored times of the at least one of the on cycles and the off cycles of the pump. The pump is switched to the other of the sub-pump mode and the continuous pumping mode in response to determining to switch the pump from the one of the sub-pump mode and the continuous pumping mode to the other of the sub-pump mode and the continuous pumping mode.

主权项

1. A method, comprising:
monitoring, by a pump control unit that operates a variable-speed pump, times of at least one of on cycles and off cycles of the variable-speed pump operating in one of a sub-pump mode in which the pump control unit operates the variable-speed pump at maximum capacity, and a continuous pumping mode in which the pump control unit operates the variable-speed pump at decreasing speeds during successive on cycles and iteratively learns from durations of a series of on/off cycles a combined minimum pump speed and longest continuous pumping duration that effectively pumps a quantity of fluid to be pumped; determining whether to switch the pump from the one of the sub-pump mode and the continuous pumping mode to the other of the sub-pump mode and the continuous pumping mode based upon the monitored times of the at least one of the on cycles and the off cycles of the pump; and switching, during an off cycle of the variable-speed pump, the pump to the other of the sub-pump mode and the continuous pumping mode in response to determining to switch the pump from the one of the sub-pump mode and the continuous pumping mode to the other of the sub-pump mode and the continuous pumping mode.