Pool Pump Controller for Ancillary Equipment Flow
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Solution Overview
Problem
Swimming pool pump systems with variable speed pumps often fail to provide sufficient pressure/output for ancillary equipment, leading to equipment damage and inefficient electrical usage, especially when replacing single speed pumps, and existing solutions require complex and costly circuitry for electrical connections.
Innovation Solution
A multi-speed pump system with a controller that senses power reduction and communicates with ancillary equipment to suspend operation when water flow rates fall below setpoints, using a sensing coil inductively coupled to the power supply line to manage the operation of equipment like pool cleaners, chlorinators, and ozone generators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If variable speed pumps are run on slow speed to reduce electrical use, then energy consumption is reduced, but the pressure/output becomes insufficient to properly operate attached equipment
Solution Approach 1:
The system dynamically adjusts pump speed based on real-time monitoring of ancillary equipment operational parameters. The controller continuously monitors parameters such as water flow rate, pressure, or equipment-specific metrics and adjusts the pump speed accordingly to maintain reliable equipment operation while optimizing energy consumption. This dynamic adjustment allows the system to operate at lower speeds when equipment demands are low and increase speed when equipment requires higher output.
Solution Approach 2:
The system implements a feedback control mechanism where the controller monitors the operational status of ancillary equipment and uses this information to adjust pump speed. Sensors detect parameters such as flow rate, pressure, or equipment motor current, and this feedback is used by the controller to modulate pump speed, ensuring equipment receives adequate pressure and flow while minimizing energy consumption during normal operation.
2Use of energy by moving object
If variable speed pumps are run on slow speed, then electrical use is reduced, but equipment is damaged due to incorrect operating pressures/outputs
Solution Approach 1:
The system takes preliminary action by establishing minimum speed thresholds and operational boundaries before equipment damage can occur. The controller is pre-programmed with equipment-specific operational parameters and minimum requirements, preventing the pump from operating at speeds that would cause equipment damage. This preemptive control approach eliminates the need for reactive damage prevention measures.
Solution Approach 2:
Real-time feedback from sensors monitoring pressure, flow rate, or equipment operational parameters allows the controller to detect approaching dangerous conditions and adjust pump speed accordingly. This continuous monitoring and adjustment prevents equipment damage by maintaining operational parameters within safe boundaries while still allowing energy-efficient low-speed operation when conditions permit.
3Ease of operation
If ancillary equipment is connected in parallel to the pump motor, then equipment operates in unison with the pool pump, but the electrical connection becomes unworkable when the motor is internally solid state controlled
Solution Approach 1:
The controller serves as an intermediary device between the pump motor and ancillary equipment. It receives power and control signals from the solid state motor and distributes appropriate signals to ancillary equipment through dry contacts or isolated output circuits. This intermediary approach allows the system to maintain equipment synchronization while accommodating the solid state motor's electrical characteristics without requiring complex direct parallel connections.
Solution Approach 2:
The electrical control system is segmented into separate functional circuits: the main power circuit to the pump motor, the control circuit for speed adjustment, and separate control circuits for ancillary equipment. This segmentation allows each circuit to be optimized independently, with the controller providing isolated control outputs that are compatible with both solid state motors and ancillary equipment requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures ancillary equipment operates effectively by controlling water flow rates, preventing damage and reducing electrical consumption, while simplifying the electrical connection process without the need for complex circuitry.
Implementation Method 1
The controller may sense the reduction in power by utilizing a sensing coil inductively coupled to a power supply line of the multi-speed pump
Data Source
AI summary
A system and method of controlling a swimming pool water circulation system. A method may include sensing the electrical current supplied to a variable speed pump to determine when the pump changes speeds and selectively supplying water to one or more ancillary equipment such that the ancillary equipment maintains sufficient water flow to operate. A system may include a multi-speed pump that generates water flow above a first rate, a controller configured to sense a reduction in power drawn by the multi-speed pump below a setpoint, and responsively communicate to the ancillary equipment to suspend operation of the ancillary equipment.