Battery Fluid Sprayer Pressure Threshold Control for Longer Runtime
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Solution Overview
Problem
Battery-powered fluid sprayers face challenges in power conservation, leading to reduced operating time due to continuous power consumption even when system fluid pressure meets or exceeds user-adjustable thresholds, necessitating a solution to manage power efficiently.
Innovation Solution
Incorporating a power controller that provides operating power to the motor controller only when system fluid pressure is less than or equal to a user-adjustable threshold, and refrains from providing power when pressure is greater, using a pressure switch to signal the power controller, thereby conserving battery power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor controller continuously operates to maintain system fluid pressure, then the fluid pressure stability is improved, but the battery power consumption increases
Solution Approach 1:
The motor controller operates periodically rather than continuously. The pressure switch detects when system fluid pressure drops below a threshold and triggers the motor controller to operate only during these periods, creating a periodic on-off operation pattern that reduces overall power consumption while maintaining pressure stability.
Solution Approach 2:
The pressure switch provides feedback about the system fluid pressure to the motor controller. When the pressure drops below the threshold, the pressure switch signals the motor controller to activate. This feedback mechanism ensures the motor controller operates only when needed to maintain pressure, avoiding continuous operation and reducing energy consumption.
2Use of energy by moving object
If the power controller is added to selectively control motor controller operation, then the power conservation is improved, but the device complexity increases
Solution Approach 1:
The pressure switch serves multiple functions: it monitors system fluid pressure, compares it to a threshold, and triggers the motor controller when needed. By making the pressure switch multi-functional, the patent avoids adding separate components for each function, thereby minimizing the increase in device complexity while achieving power conservation.
Solution Approach 2:
The power control functionality is merged with the existing pressure switch and motor controller components. Rather than adding a completely separate power control system, the patent integrates the control logic into the existing components, combining their functions to achieve power conservation without significantly increasing overall device complexity.
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 approach extends the operating time of the battery-powered fluid sprayer by reducing power consumption during operation, allowing for longer usage on a single charge by ensuring power is only used when necessary to maintain system fluid pressure.
Implementation Method 1
The pressure switch generates a pressure signal indicative of whether the system fluid pressure is greater than the user-adjustable pressure threshold
Implementation Method 2
The power controller is configured to control power of the battery powered fluid sprayer by providing operating power of the motor controller in response to the pressure signal indicating that the system fluid pressure is less than the user-adjustable pressure threshold
Implementation Method 3
The electric motor is electrically connected to the battery and to the pump to drive operation of the pump for spraying
Implementation Method 4
A pump draws the spray fluid from a reservoir, pressurizes the fluid, and drives the fluid downstream to a spray gun
Data Source
AI summary
A battery powered fluid sprayer includes a reciprocating positive displacement pump, a power supply that includes a battery, an electric motor, a motor controller, a user-adjustment mechanism for setting a user-adjustable pressure threshold corresponding to system fluid pressure of the battery powered fluid sprayer, a pressure switch, and a power controller. The pressure switch generates a pressure signal indicative of whether the system fluid pressure is greater than the user-adjustable pressure threshold. The power controller is configured to control power of the battery powered fluid sprayer by providing operating power of the motor controller in response to the pressure signal indicating that the system fluid pressure is less than the user-adjustable pressure threshold, and not providing the operating power of the motor controller in response to the pressure signal indicating that the system fluid pressure is greater than the user-adjustable pressure threshold.