Three-Way Air Duct Shutter for Selective Cabin Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing car air conditioning systems lack versatility and flexibility in controlling refrigerated air flow rates to different vehicle areas and often require fan deactivation for simultaneous air feeding.
Innovation Solution
A three-way joint with a shutter mechanism that allows selective control of refrigerated air flow rates to multiple outlets and prevents air feeding when closed, enhancing system versatility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a three-way joint with a simple shutter mechanism is used, then the device complexity is reduced and manufacturing cost is lowered, but the versatility and flexibility in controlling refrigerated air flow rates to different outlets is insufficient
Solution Approach 1:
The three-way joint is designed with an inlet and two outlets, where the shutter can selectively direct refrigerated air flow to either outlet or both simultaneously. This single component performs multiple functions: controlling flow distribution to different vehicle areas (front and rear seats), enabling flexible temperature control in different zones, and eliminating the need for separate control mechanisms for each outlet.
Solution Approach 2:
The shutter mechanism is made movable between different positions (first position directing flow to first outlet, second position directing flow to second outlet, and intermediate positions for simultaneous flow to both outlets). This dynamic capability allows the system to adapt to different cooling requirements in real-time without increasing manufacturing complexity.
2Reliability
If the three-way joint is designed to simultaneously lock the feeding of refrigerated air to both outlets, then the system can prevent air feeding when needed, but the fan must be deactivated which reduces operational flexibility
Solution Approach 1:
The function of preventing air feeding is extracted from the fan control system and transferred to the three-way joint's shutter mechanism. When the shutter is positioned to block both outlets, it effectively stops refrigerated air flow without requiring fan deactivation. This separates the flow control function from the fan operation, allowing the fan to remain operational while preventing air delivery to specific outlets.
3Device complexity
If the three-way joint has fixed flow control, then the device complexity is minimized, but the ability to selectively control refrigerated air flow rates to different outlets is lost
Solution Approach 1:
The shutter is designed to be movable within the three-way joint, allowing it to assume different positions that correspond to different flow distribution modes. The shutter can be positioned to direct flow to the first outlet only, the second outlet only, or both outlets simultaneously with adjustable flow rates. This dynamic positioning capability provides selective flow control without requiring complex additional mechanisms.
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 system provides selective control of air flow rates to different vehicle areas without fan deactivation, improving versatility and reducing manufacturing costs.
Implementation Method 1
a shutter (19) mounted within the valve body (15) for moving between a closing position, in which the inlet (16) is blocked off from the two outlets (17, 18), a first opening position, in which the inlet (16) is connected both to the first outlet (17) and to the second outlet (18), a second opening position, in which the inlet (16) is connected to the first outlet (17) and is blocked off from the second outlet (18), and a third opening position, in which the inlet (16) is connected to the second outlet (18) and is blocked off from the first outlet (17)
Data Source
AI summary
A car air conditioning system has a pneumatic circuit to feed an air flow into a passenger compartment of a vehicle, and a cooling circuit to cool the air flow fed along the pneumatic circuit; the pneumatic circuit being provided with a three-way joint, which has an inlet connected to a first pneumatic duct, a first outlet connected to a second pneumatic duct, a second outlet communicating with the passenger compartment of the vehicle, and a shutter, which is movable from and to a closing position, wherein the inlet is separate from the two outlets.