Blower Register Current Control via Resistor Segmentation
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Solution Overview
Problem
Conventional blower registers require significant design changes, increased parts, and higher costs to enhance rotation speed levels, making it costly and time-consuming to increase the number of rotation speed levels of a blower.
Innovation Solution
A blower register that includes a movable terminal, fixed terminals, resistors, and a current flow control part with bypass switches and a microcomputer to subdivide the current flow paths, allowing for increased rotation speed levels without additional fixed terminals or resistors, thereby reducing structural changes and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional fixed terminals and resistors are installed to increase rotation speed levels, then the number of rotation speed levels increases, but the device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent divides the single resistor into multiple sub-resistors (first sub-resistor, second sub-resistor, third sub-resistor) that can be independently controlled. This segmentation allows the same physical resistor components to provide multiple resistance values by selectively connecting different combinations of sub-resistors in series or parallel, thereby increasing the number of rotation speed levels without adding more physical resistors or fixed terminals.
Solution Approach 2:
The patent introduces a control unit that dynamically reconfigures the resistor connections based on the desired rotation speed level. The control unit selectively connects or disconnects the sub-resistors in different configurations (series, parallel, or combinations) to provide multiple effective resistance values from the same physical components, enabling flexible adjustment of blower motor speed without increasing hardware complexity.
2Adaptability or versatility
If additional fixed terminals and resistors are installed to increase rotation speed levels, then the number of rotation speed levels increases, but the manufacturing cost increases
Solution Approach 1:
The patent makes the resistor assembly multi-functional by designing it to provide multiple resistance values through different connection configurations of the same physical sub-resistors. This universal design allows a single resistor assembly to replace what would traditionally require multiple separate resistors and fixed terminals, thereby reducing component count, simplifying manufacturing, and lowering costs while still achieving multiple rotation speed levels.
Solution Approach 2:
The patent merges multiple resistance functions into a single integrated resistor assembly with controllable sub-resistors. Instead of using separate resistors for each speed level, the invention combines multiple sub-resistors into one assembly that can be electrically reconfigured to provide different total resistance values, reducing the overall number of components and simplifying the manufacturing process.
3Adaptability or versatility
If the register structure is significantly changed to increase rotation speed levels, then the number of rotation speed levels increases, but the design and implementation time increase
Solution Approach 1:
The patent performs preliminary design by pre-configuring the resistor assembly with multiple sub-resistors that can be selectively connected. The control unit is programmed with predetermined connection configurations for different rotation speed levels. This preliminary preparation allows the system to achieve multiple speed levels through simple electronic switching rather than requiring complex mechanical reconfiguration or extensive redesign, thereby reducing implementation time.
4Adaptability or versatility
If more fixed terminals are added to support higher rotation speed levels, then the number of rotation speed levels increases, but the device complexity increases
Solution Approach 1:
The patent introduces a control unit as an intermediary between the power source and the blower motor. This control unit manages the complex switching logic and selectively connects the appropriate sub-resistors based on the desired speed level. By placing the intelligence in the control unit rather than requiring multiple fixed terminals and complex wiring, the invention reduces physical device complexity while still achieving multiple rotation speed levels through electronic control.
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 the increase of rotation speed levels with minimal cost burden and structural changes, achieving a cost-saving effect by controlling the current flow through resistors using bypass switches and a microcomputer.
Implementation Method 1
a plurality of resistors (40a, 40b, 40c, and 40d) respectively installed on the downstream side of the fixed terminals (30a, 30b, 30c, and 30d) to adjust a current value of an electric current applied to a blower motor (7)
Data Source
AI summary
A blower register includes a movable terminal, a plurality of fixed terminals to which the movable terminal is selectively connected, a plurality of resistors installed on the downstream side of the fixed terminals to adjust a current value of an electric current applied to a blower, and a current flow control part configured to subdivide the current value of the electric current in a number larger than the number of the fixed terminals and to form current flow paths through the resistors so that a rotation speed level of the blower is controlled to one of rotation speed levels larger in number than the fixed terminals.