Vehicle Blower Unit Single Actuator Dual Door Linkage
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Solution Overview
Problem
Conventional blower units for vehicle air conditioners face difficulties in operating various internal and external air inflow modes due to complex structures and increased operational parts when using multiple doors, and struggle to efficiently manage air flow with existing door mechanisms.
Innovation Solution
A blower unit design that incorporates a cam system to link and drive two doors using a single actuator, optimizing the arrangement of slots and curvatures to efficiently adjust and switch between internal, semi-external, and external air modes, reducing the number of operational components and simplifying the operational structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple doors are used to manage internal and external air inlets, then air flow management capability is improved, but device complexity and number of operational parts increase
Solution Approach 1:
The patent combines multiple door functions into a single integrated door structure that can selectively open or close both the internal air inlet and external air inlet. This unified door mechanism reduces the number of separate operational parts while maintaining the capability to manage different air flow modes (internal air mode, external air mode, and mixed mode), thereby resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The single door is designed with multi-functionality to perform multiple roles: it can close the external air inlet while opening the internal air inlet for internal air mode, close the internal air inlet while opening the external air inlet for external air mode, and partially open both for mixed mode. This universal design allows one door to replace what would traditionally require multiple separate doors, reducing operational parts while maintaining air flow management versatility.
2Manufacturing precision
If multiple actuators are used to drive multiple doors, then door control precision is improved, but manufacturing cost and load increase
Solution Approach 1:
The patent merges the control functions of multiple actuators into a single actuator that drives the unified door mechanism. This single actuator is equipped with a control system capable of precisely positioning the door at various angles to achieve different air flow modes, thereby maintaining door control precision while reducing manufacturing cost and system load by eliminating the need for multiple separate actuators.
Solution Approach 2:
The single actuator is designed with multi-functional control capability to manage different door positions and configurations. It can precisely control the door to achieve complete closure, partial opening, or selective opening of different inlets, providing the same level of control precision that would require multiple actuators but at reduced manufacturing cost and lower system load.
3Ease of manufacture
If a single actuator drives two doors, then manufacturing cost and load are reduced, but operational complexity increases
Solution Approach 1:
The patent merges two separate doors into a single integrated door structure that can be controlled by one actuator. This unified structure simplifies the operational mechanism by eliminating the need for coordinating multiple independent doors, thereby reducing operational complexity while maintaining the capability to manage different air flow modes. The single door is designed with appropriate linkage mechanisms that allow one actuator to effectively control air inlet openings.
Data Source
AI summary
A blower unit of an air conditioner for a vehicle which allows one actuator to drive two doors in a structure in which at least two doors are provided in an intake duct is disclosed. The blower unit of an air conditioner for a vehicle includes an intake duct including an internal air inlet through which internal air is introduced and an external air inlet through which external air is introduced, a first door configured to adjust an opening amount of a part of the external air inlet and an opening amount of the internal air inlet, and a second door configured to adjust an opening amount of the remaining part of the external air inlet, wherein the first door and the second door are linked and driven together.