Food Processor Motor Control with Automatic Speed Adjustment
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Solution Overview
Problem
Conventional blenders require user experience to ensure optimal food processing, as they lack automated control for determining the appropriate processing conditions, leading to suboptimal results for inexperienced users.
Innovation Solution
A food processor with a motor base, container, switch unit, sensor unit, and control unit that automatically determines and adjusts the rotary speed of the cutting blade unit based on the desired food processing state, including an initial judgment mode and abnormal processing modes to handle any detected issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional blenders use manual select buttons for processing speed, then the device structure remains simple, but optimal processing cannot be ensured for inexperienced users
Solution Approach 1:
The food processor automatically detects food type, determines optimal processing parameters, and executes the processing sequence without user intervention. The control unit self-adjusts motor speed based on sensor feedback, eliminating the need for users to manually select processing modes while ensuring optimal results.
Solution Approach 2:
The system uses sensors to detect motor current, rotation speed, and processing state, feeding this information back to the control unit. Based on this feedback, the control unit dynamically adjusts motor speed and processing time to achieve optimal food processing results automatically.
2Productivity
If the motor unit operates at high speed continuously, then food processing efficiency increases, but motor damage risk increases under abnormal conditions
Solution Approach 1:
The control unit pre-establishes abnormal condition thresholds for motor current, rotation speed, and temperature. When sensors detect parameters approaching these thresholds, the system proactively reduces motor speed or stops operation before damage occurs, preventing rather than reacting to motor failures.
Solution Approach 2:
Sensors continuously monitor motor current, rotation speed, and temperature, providing real-time feedback to the control unit. The control unit dynamically adjusts motor operation based on this feedback, reducing speed under abnormal conditions to prevent motor damage while maintaining efficient operation under normal conditions.
3Reliability
If the control unit automatically determines processing parameters, then consistent results are achieved, but the device complexity increases
Solution Approach 1:
The control unit automatically detects food type through sensors, determines optimal processing parameters from pre-stored data, and executes the processing sequence without user input. This self-service capability ensures consistent results while the modular sensor and control architecture keeps the added complexity manageable.
Data Source
AI summary
A food processor includes a control unit that is operable in accordance with an initial control signal from a switch unit so as to activate a motor unit to operate in a sequence of an initial judgment mode and a food processing mode. The control unit switches operation of the motor unit from the initial judgment mode to the food processing mode upon determining a first target rotary speed in accordance with a motor rotation signal generated by a sensor unit for indicating a rotary speed of the motor unit during operation of the motor unit in the initial judgment mode so as to drive rotation of a cutting blade unit provided in a container to process food items contained in the container. The control unit activates the motor unit to rotate at a second target rotary speed associated with the first target rotary speed during operation of the motor unit in the food processing mode.