Frozen Beverage Machine Pressure Control Using Transducer Feedback
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Solution Overview
Problem
Existing frozen beverage machines struggle with inconsistent control over liquid levels, pressures, and carbon dioxide content, leading to issues such as inconsistent ice crystal size, fluctuating barrel pressure, and poor drink quality, while also facing challenges in reducing total cost of ownership and minimizing service calls due to inferior parts and complex electrical connections.
Innovation Solution
A dynamic charge control system using pressure transducers and electronically controlled solenoids to maintain optimal pressure in the freezing chamber by adjusting gas supply and venting, coupled with a controller to dynamically adjust pressure based on operational characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a pressure responsive device is used to control the amount of ingredients fed into the chamber, then the quantity of ingredients can be maintained at a prescribed amount, but the control over liquid levels, pressures, and carbon dioxide content becomes inconsistent
Solution Approach 1:
The patent implements a feedback control system using a pressure transducer to continuously monitor pressure in the freezing chamber and dynamically adjust the solenoid valve operation. This closed-loop feedback mechanism ensures consistent control of liquid levels, pressures, and carbon dioxide content by automatically responding to actual chamber conditions rather than relying on fixed pressure-responsive mechanisms.
Solution Approach 2:
The patent replaces traditional mechanical pressure responsive devices with an electronically controlled solenoid valve system. This substitution allows for more precise and reliable control of ingredient flow by using electronic signals from the pressure transducer to regulate the solenoid, eliminating the inconsistencies inherent in purely mechanical pressure-responsive control mechanisms.
2Stability of the object's composition
If the machine initiates a freeze cycle based on motor torque dropping below a threshold, then the mixture can be refrozen, but the barrel may become too cold and product may not dispense as expected
Solution Approach 1:
The system uses pressure transducer feedback to monitor chamber pressure and determine optimal freeze cycle timing, replacing the motor torque-based control method. This feedback mechanism provides more accurate information about the actual state of the mixture, allowing the controller to initiate freeze cycles at appropriate moments and prevent over-freezing that would cause dispensing problems.
Solution Approach 2:
The pressure transducer continuously monitors chamber conditions and automatically triggers freeze or defrost cycles as needed without requiring manual intervention or relying on indirect indicators like motor torque. The system self-regulates the freezing process based on real-time pressure data, ensuring the mixture maintains proper consistency while avoiding excessive cold temperatures.
3Reliability
If solenoids are activated frequently to maintain optimal pressure, then beverage quality is improved, but solenoid lifespan is reduced
Solution Approach 1:
The system dynamically adjusts solenoid activation frequency and duration based on real-time pressure transducer readings and operational characteristics. Rather than using fixed activation schedules, the controller modulates solenoid operation to match actual chamber conditions, maintaining beverage quality while minimizing unnecessary solenoid cycles that would reduce component lifespan.
Solution Approach 2:
The controller changes operational parameters such as solenoid activation timing, duration, and frequency based on pressure transducer data and detected operational characteristics. This dynamic parameter adjustment allows the system to maintain optimal pressure and beverage quality while adapting solenoid usage patterns to extend component life by avoiding excessive activation.
4Adaptability or versatility
If complex electrical connections are used in the dispenser, then functionality is enhanced, but service calls increase due to connection errors
Solution Approach 1:
The pressure transducer and controller system provides self-diagnostic capabilities that automatically detect and report connection issues or operational problems. This self-monitoring functionality reduces the need for service calls by enabling early detection of problems and providing diagnostic information that simplifies field repairs, even in systems with complex electrical connections.
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
The system ensures consistent beverage quality by controlling ice crystal size and pressure, reduces service calls by extending solenoid life through strategic activation, and minimizes initial costs by optimizing part quality.
Implementation Method 1
a pressure transducer to measure pressure in the freezing chamber
Implementation Method 2
a refrigeration system for freezing a product in the freezing chamber
Implementation Method 3
a fill valve and a vent valve, each having an input electrically connected to a solenoid
Data Source
AI summary
A machine for producing frozen comestibles having a control system based on one or more operational characteristics, including product characteristics, to control the consistency and quality of the comestible, and to extend the useful lifespans of its components.