Counter-Rotating Blender Cylinder for Improved Grinding Flow
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Solution Overview
Problem
Conventional blenders suffer from reduced grinding performance due to unidirectional rotation of grinding blades, leading to inefficient processing of fruits and vegetables, and require additional juice extraction steps, causing inconvenience.
Innovation Solution
A blender design incorporating a controller that alternates the rotation direction of an internal cylinder opposing the grinding blade, combined with a projection on the internal cylinder surface to induce a downward spiral flow, ensuring blending objects return to the grinding blade, enhancing grinding performance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the grinding blade rotates unidirectionally or bidirectionally for a certain time, then the motor can operate continuously, but the blending objects are radially pushed outwardly by centrifugal force, significantly reducing grinding effect and juice producing effect
Solution Approach 1:
The internal cylinder rotates in the opposite direction to the grinding blade rotation, creating counter-rotational motion that prevents centrifugal force from pushing blending objects outward, thereby maintaining grinding effectiveness during continuous operation
Solution Approach 2:
The controller controls the internal cylinder to periodically reverse its rotation direction at predetermined time intervals, creating cyclic counter-rotational patterns that continuously disrupt centrifugal force effects and maintain grinding performance
2Device complexity
If the grinding blade rotates unidirectionally, then the structure is simple, but blending objects are radially pushed outwardly by centrifugal force, reducing grinding effect
Solution Approach 1:
The internal cylinder acts as an intermediary component between the grinding blade and the blending objects, using its counter-rotation to counteract centrifugal force and improve grinding effectiveness without requiring complex modification of the grinding blade itself
Solution Approach 2:
The controller implements periodic reversal of the internal cylinder's rotation direction, creating time-varying counter-rotational patterns that maintain grinding effectiveness through simple cyclic control rather than complex continuous control
3Productivity
If an additional juice extractor is used to extract juice during grinding, then juice can be produced, but it leads to inconvenience
Solution Approach 1:
The blender merges the grinding function and juice extraction function into a single integrated device, where the counter-rotating internal cylinder simultaneously achieves both grinding and juice production without requiring a separate juice extractor
Solution Approach 2:
The internal cylinder serves multiple functions: it prevents centrifugal force effects during grinding, enhances the grinding action through counter-rotation, and enables juice extraction through its rotational motion, making the device multi-functional without requiring separate specialized components
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 alternating rotation pattern and spiral flow design significantly improve grinding efficiency by preventing blending objects from piling up and ensuring thorough processing, increasing the effectiveness of fruit and vegetable grinding and juice extraction.
Implementation Method 1
blending objects are radially pushed outwardly by centrifugal force
Implementation Method 2
the projection having a screw projection line shape inducing a downward spiral flow of the blending object
Data Source
AI summary
A blender includes a blender body including an external cylinder, a grinding blade, and a blade driving portion rotating the grinding blade; an internal cylinder unit including an internal cylinder, disposed in the external cylinder, in which the grinding blade is disposed, and an internal cylinder driving portion rotating the internal cylinder; and a controller electrically connected to the blade driving portion and the internal cylinder driving portion to control the blade driving portion and the internal cylinder driving portion. The internal cylinder has an internal side surface on which a projection is formed such that blending objects, flowing rotationally while being ground by the grinding blade, are caught. A mixer according to the present invention comprises: a mixer main body provided with an outer container, pulverizing blades, and a blade driving unit for rotating the pulverizing blades; an inner container unit provided with an inner container, arranged inside the outer container, having the pulverizing blades located therein, and with an inner container driving unit for rotating the inner container; and a controller electrically connected to the blade driving unit and inner container driving unit to control both, wherein the inner container is provided with a protruding part on the inner side surface thereof so that the circularly moving foodstuff being mixed gets caught thereon while being pulverized by the pulverizing blades, and, in order to induce a state of imbalance in the foodstuff being mixed in the inner container, the controller controls the inner container driving unit to mix the foodstuff being mixed while repeating the patterns of reverse-rotating the inner container in the direction opposite to the rotational direction of the pulverizing blades and then stopping, or reverse-rotating and then changing the rotational velocity.