Vehicle HVAC Temperature Door Linkage for Fewer Actuators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicular air conditioning systems require separate actuators to control main and sub temperature doors, leading to increased part count and manufacturing costs, which hinders cost reduction efforts.
Innovation Solution
A vehicular air conditioning system where the sub temperature door is controlled in conjunction with the main temperature door using an interlocking mechanism, eliminating the need for a separate actuator, and featuring a configuration with a cooling heat exchanger, heating heat exchanger, and interlocking parts that rotate the doors at different angular velocities to adjust airflow paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate actuators are used to control main and sub temperature doors, then temperature control precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the control functions of main and sub temperature doors into a single actuator. The actuator includes a main temperature door drive mechanism and a sub temperature door drive mechanism integrated together, eliminating the need for separate actuators while maintaining independent control capability through sequential operation modes
Solution Approach 2:
The single actuator is divided into functionally independent drive mechanisms for main and sub temperature doors. The control system segments the operation into main door control mode and sub door control mode, allowing precise temperature control through staged activation of different drive mechanisms within the same actuator unit
2Adaptability or versatility
If separate actuators are used for main and sub temperature doors, then control independence is improved, but manufacturing cost increases
Solution Approach 1:
Multiple control functions are merged into a single actuator unit that can operate in different modes. The actuator maintains control independence by enabling selective activation of main door control or sub door control based on operational requirements, reducing part count and manufacturing complexity while preserving functional versatility
Solution Approach 2:
The single actuator is designed with multi-functionality to perform both main temperature door control and sub temperature door control. Through different control modes, the same actuator unit adapts to various operational scenarios, eliminating the need for multiple specialized actuators and reducing manufacturing costs
3Device complexity
If the sub temperature door is controlled without a separate actuator, then device complexity is reduced, but control precision may be compromised
Solution Approach 1:
The actuator employs dynamic control strategies where the sub temperature door drive mechanism is activated at specific stages of the main door opening/closing process. This dynamic, staged activation ensures precise temperature control by adjusting airflow through the sub door in coordination with main door position, maintaining control precision without requiring a separate dedicated actuator
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 configuration reduces the number of parts and achieves cost reduction by eliminating the need for separate actuators, while improving airflow and temperature control efficiency by ensuring the sub temperature door opens fully before the main door, enhancing cooling and heating performance.
Implementation Method 1
a cooling heat exchanger and a heating heat exchanger
Implementation Method 2
a cooling heat exchanger and a heating heat exchanger
Data Source
AI summary
A vehicular air conditioning system provided with a cooling heat exchanger and a heating heat exchanger includes a cold air flow path through which an air passing through the cooling heat exchanger bypasses the heating heat exchanger, a hot air flow path through which the air passing through the cooling heat exchanger passes, a plurality of temperature doors configured to allow the air passing through the cooling heat exchanger to selectively pass through the heating heat exchanger, and an interlocking part configured to allow the temperature doors to be driven in conjunction with each other.