Air Conditioning Drainage Decoupling Pressure Levels
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Solution Overview
Problem
The existing drainage systems for air conditioning systems in motor vehicles face challenges in efficiently draining water from the air intake to the air distribution housing due to pressure differences, often requiring additional complex and costly components like check valves and two-component covers, which can lead to water accumulation and increased installation costs.
Innovation Solution
A drainage system with a single, integrally formed plastic duct in the lower shell of the air distribution housing, dividing the drainage opening into separate areas for water from the air intake and air distribution housing, allowing direct discharge into the environment, thus decoupling pressure levels and eliminating the need for extra components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve or two-component cover is used to prevent water from being suctioned back into the air intake, then water drainage reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the drainage functions for both the air intake housing and air distribution housing into a single integrated drainage opening in the lower shell. This merging of functions eliminates the need for separate drainage paths and additional components like check valves, while maintaining reliable water drainage by allowing both areas to drain directly to the environment at atmospheric pressure.
Solution Approach 2:
The patent extracts the drainage function from the pressurized air distribution housing by providing a direct drainage opening to the environment. This separates the drainage path from the pressurized air path, allowing water to drain independently at atmospheric pressure without being affected by the pressure differential that would otherwise require check valves.
2Reliability
If additional components like check valves and two-component covers are used to manage pressure differences, then water drainage reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple drainage functions into a single drainage opening in the lower shell, eliminating the need for separate check valves and two-component covers. This integration simplifies the manufacturing process and reduces material costs while maintaining the ability to reliably drain water from both the air intake housing and air distribution housing.
Solution Approach 2:
The single drainage opening in the lower shell serves multiple functions: it drains water from both the air intake housing and the air distribution housing, and it provides a direct path to the environment for both drainage streams. This multi-functional design eliminates the need for multiple specialized components.
3Reliability
If the air intake is positioned higher than the air distribution housing to create hydrostatic pressure, then water drainage reliability is improved, but adaptability to installation spaces deteriorates
Solution Approach 1:
The patent introduces the lower shell with its drainage opening as an intermediary structure that receives water from both the air intake housing and air distribution housing. This intermediary allows water to be collected and discharged to the environment at atmospheric pressure, eliminating the need for the air intake to be positioned higher than the air distribution housing and enabling installation in various spatial configurations.
4Device complexity
If a single integrated drainage system is used without additional components, then manufacturing cost and device complexity are reduced, but water drainage reliability under pressure differences may deteriorate
Solution Approach 1:
The patent extracts the drainage function from the pressurized air distribution system by providing a direct drainage opening in the lower shell that discharges to the environment. This separation allows water to drain independently at atmospheric pressure, unaffected by the pressure differential in the air distribution housing, thereby maintaining reliability without requiring additional components.
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
Facilitates reliable water drainage without additional components, reducing installation costs and preventing water from entering the vehicle interior, while ensuring effective drainage under varying pressure conditions.
Implementation Method 1
The air intake is situated on a suction side of a fan. The air distribution housing, however, is situated on a discharge side of the fan. Thus, an excess pressure exists in the air distribution housing as opposed to the area of the air intake.
Data Source
AI summary
A drainage system for draining water from an air intake and from an air distribution housing of an air conditioning system into the environment. The drainage system including a drainage opening or the drainage of water into the environment, wherein the drainage opening is formed on a lower shell of the air distribution housing and is divided into a drainage area for water from the air intake housing on the one hand, and a drainage area for water from the air distribution housing on the other hand, and wherein the drainage area for water from the air intake housing is formed by the terminus of a separate duct for the drainage of water from the air intake. In this way, the reciprocal effect between the different pressure levels is avoided or reduced to the extent possible.