Vehicle Air-Conditioning Unit Drain Space Design
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Solution Overview
Problem
Conventional vehicle air-conditioning units face challenges in completely preventing water entry from the exterior into the vehicle compartment, particularly during high-pressure washing, leading to potential leaks from the tubing routing space.
Innovation Solution
A vehicle air-conditioning unit design that includes a tubing coupler, inner tubing, sealing component, and a seal compressing portion with a drain space positioned below the tubing routing space, allowing water to be discharged from the tubing routing space to the exterior through a dedicated drain path, preventing backward flow into the routing space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a through hole is provided in the dash panel to route refrigerant tubing, then the air-conditioning unit can be coupled to exterior tubing, but water may enter the vehicle compartment through the through hole during high-pressure washing
Solution Approach 1:
The patent segments the sealing function from the routing function by providing separate through holes: one for refrigerant tubing passage and another for drain water discharge. This segmentation allows the system to maintain both coupling capability and water protection by directing different fluids through different paths.
Solution Approach 2:
The patent introduces a drain path as an intermediary mechanism that captures and redirects water before it can enter the vehicle compartment through the refrigerant tubing through hole. The drain path acts as a mediator between the exterior environment and the interior sealing system.
2Reliability
If dash sealing material is used to prevent water entry through the through hole, then waterproofing is improved, but water can still enter the tubing routing space during high-pressure washing
Solution Approach 1:
The patent extracts the water drainage function from the sealing system by providing a dedicated drain path that is separate from the refrigerant tubing route. This allows the sealing material to focus on sealing the refrigerant path while the drain path independently handles water removal from the tubing routing space.
Solution Approach 2:
The drain path is designed to preemptively capture and remove water that enters the tubing routing space before it can accumulate or leak into the vehicle compartment. This preliminary drainage action prevents water intrusion problems before they occur.
3Reliability
If the seal compressing portion is designed to compress the sealing component against the through-hole surrounding portion, then sealing is improved, but water that enters the tubing routing space has no drainage path
Solution Approach 1:
The patent segments the sealing function and drainage function into separate structural elements: the seal compressing portion compresses the sealing component against the through-hole surrounding portion to seal the refrigerant path, while the drain path provides a separate route for water removal from the tubing routing space.
Data Source
AI summary
A vehicle air-conditioning unit includes a seal compressing portion presses a sealing component against a partition wall that separates an interior and an exterior of a vehicle compartment. The seal compressing portion is positioned in the interior of the vehicle compartment and includes a tubing routing space through which inner tubing extends, and a drain space positioned below the tubing routing space to receive water drained from the tubing routing space. The drain space communicates with the exterior of the vehicle compartment via a through hole of the partition wall to discharge water from the drain space to the exterior of the vehicle compartment.