Servo Motor Beverage Faucet Proportional Flow Control
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Solution Overview
Problem
Existing automatic beverage dispensing systems lack proportional control over beverage flow and are prone to valve sticking during power failures, requiring continuous monitoring and laborious cleaning processes.
Innovation Solution
A servo motor-controlled faucet system with a keypad interface and flow sensor, allowing for proportional beverage dispensing and automatic shut-off, along with a clean-in-place mode, to address these issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If solenoid valves are used for automatic beverage dispensing, then automation is improved, but flow control precision deteriorates because they only have two states (opened and closed) and cannot proportionally control flow
Solution Approach 1:
The patent applies dynamics by replacing static two-state solenoid valves with a dynamic servo motor system that can continuously adjust the valve opening degree. The servo motor receives pulse signals to precisely control the lever position, enabling proportional flow control while maintaining automation. This transforms the system from discrete on/off states to continuous adjustable states.
2Extent of automation
If solenoid valves are used in automatic dispensing systems, then automation is improved, but reliability deteriorates because valves can become stuck in the open state during power loss or equipment failure
Solution Approach 1:
The patent applies preliminary anti-action by designing a spring-loaded valve mechanism that automatically returns to the closed position when power is lost. The spring is pre-loaded to counteract the opening force, so when electrical power fails, the spring immediately pushes the lever back to close the valve, preventing the harmful effect of stuck-open valves and ensuring system safety.
Solution Approach 2:
The patent converts the potential harm of power loss into a beneficial safety feature. Instead of power loss causing the valve to stick open, the system is designed so that power loss automatically triggers valve closure through the spring mechanism. This transforms a reliability risk into a safety advantage, where the failure mode becomes inherently protective.
3Ease of manufacture
If traditional manual faucets are used, then cleaning is simplified, but labor efficiency deteriorates because disassembly is required for regular cleaning
Solution Approach 1:
The patent applies universality by designing a faucet assembly that serves multiple functions: it can be operated manually, controlled automatically via servo motor, and cleaned in-place. The valve mechanism is designed with a clean-in-place capability that allows cleaning solution to flow through all internal passages without disassembly, combining the benefits of automated operation with easy maintenance.
4Productivity
If automated dispensing systems are implemented, then labor requirements are reduced, but device complexity increases due to additional components like servo motors and control circuits
Solution Approach 1:
The patent applies feedback by implementing a control circuit that receives input from the servo motor's position and adjusts the valve opening accordingly. The system uses feedback signals to maintain precise control of the beverage flow, enabling automated operation with accurate portion control while managing system complexity through intelligent control algorithms.
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
Enables precise control of beverage flow, prevents valve sticking during power failures, and facilitates easy cleaning without disassembly, improving operational efficiency and hygiene.
Implementation Method 1
A servo motor is mounted on the bracket and is coupled to operate the lever to open and close the faucet. The servo motor is able to open the faucet by varying amounts to control proportionally the flow of the beverage.
Implementation Method 2
Preferably, a flow sensor is employed to measure the amount of beverage flowing though the faucet which enables the control circuit to command the motor to close the faucet when the appropriate portion of beverage has been dispensed.
Data Source
AI summary
A beverage dispenser has a faucet with a spout, a fitting for connection to a beverage supply, and a lever operated valve. A servo motor, coupled to the lever, operates the faucet and proportionally controls the flow of the beverage. That proportional flow control manages the amount of beverage foaming. A flow sensor has a magnetic turbine within the faucet and a Hall effect element that magnetically senses turbine motion and produces a signal indicating an amount of beverage flow. A keypad enables service personnel to designate various portions of the beverage to automatically fill serving containers of different sizes. A control circuit responds to activation of the keypad and to the flow sensor by operating the servo motor to dispense the related quantity of the beverage.