Integrated Seat Ventilation Blower with On-Board Control Circuit
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Solution Overview
Problem
The existing vehicle seat ventilation systems are costly due to separate configurations of controllers and blowers, leading to increased development costs and reduced space utilization in vehicles.
Innovation Solution
Integration of the control function into the seat ventilation blower without a separate controller, incorporating a circuit board with a motor assembly and heat dissipation patterns, and utilizing a microcontroller unit for on/off control signals, which eliminates the need for a separate control space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the controller and blower are configured separately on respective printed circuit boards, then the control function can be independently implemented, but the overall manufacturing cost increases and space utilization deteriorates
Solution Approach 1:
The patent merges the controller and blower into a single integrated unit. The control circuit is directly mounted on the blower assembly, eliminating the need for separate controller housing and independent circuit boards. This integration maintains full control functionality while reducing system complexity, manufacturing cost, and installation space requirements.
2Ease of manufacture
If the controller and blower are constituted as separate units, then each component can be independently manufactured and maintained, but space utilization of the vehicle seat is deteriorated
Solution Approach 1:
The controller and blower are combined into a single compact unit that mounts directly to the vehicle seat. This integration eliminates the space required for separate controller housing and wiring harnesses, significantly improving space utilization while maintaining manufacturing feasibility through modular assembly processes.
3Adaptability or versatility
If a separate controller is used, then the control logic can be independently optimized, but the manufacturing cost and component count increase
Solution Approach 1:
The control circuit is integrated directly into the blower assembly with the motor assembly. This allows control logic to be optimized for the specific blower application while reducing the total component count. The integrated design eliminates separate controller units, connectors, and associated wiring, simplifying the overall system.
4Device complexity
If external controllers and wiring are eliminated through integration, then manufacturing cost reduces and space utilization enhances, but the heat dissipation management becomes more challenging
Solution Approach 1:
The circuit board incorporates localized heat dissipation features including copper pour areas, thermal vias, and heat sinks positioned directly adjacent to high-power components. This local heat management approach effectively dissipates heat from the integrated control circuit and motor assembly without requiring external cooling systems, maintaining reliability while achieving system integration.
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
This integration reduces manufacturing costs, simplifies the manufacturing process, and enhances space utilization by eliminating external controllers and wiring, thereby reducing the overall weight and component count of the seat ventilation system.
Implementation Method 1
a heat dissipation pattern for cooling heat dissipation of the exothermic element is formed on one side or both sides of the circuit board body
Implementation Method 2
an exothermic element mounted on the circuit board body is arranged between the housing and a position out of a range of blades of the impeller to be cooled
Data Source
AI summary
A seat ventilation blower may include a first housing; a second housing coupled and assembled to the first housing; an impeller inserted inside the first housing or the second housing, the impeller configured to rotate; and a circuit board body having a motor assembly coupled to the impeller to rotate the impeller wherein the circuit board body is configured to control operation of the motor assembly and installed in the housing when the first and second housings are coupled and assembled together.