Quad-Zone Booster Intake Cooling Assembly for LPM Heat Sink Airflow
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Solution Overview
Problem
HVAC air-handling systems face challenges in packaging and cooling of linear power module (LPM) heat sinks, particularly when multiple zones with independent temperature control are required, as existing solutions either lead to inefficient heat exchange or obstruction of air flow due to the placement of the heat sink within two segregated flow paths.
Innovation Solution
An air-handling system with a housing featuring a heat exchange passageway that minimizes cross-flow between two flow paths, allowing for fluid communication and heat exchange with the LPM heat sink, positioned to maintain effective cooling without obstructing air flow, using a configuration that includes a first and second compartment and connecting passages to ensure minimal pressure drop and optimal heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the LPM heat sink is positioned within the flow path of conditioned air for cooling, then heat exchange efficiency is improved, but air flow obstruction and pressure drop increase
Solution Approach 1:
The housing is divided into two separate flow paths that are segregated by a partition wall, with the heat sink positioned in one flow path. This segmentation allows independent control of air flow through each path, enabling the heat sink to be cooled without obstructing the other flow path, thus resolving the contradiction between heat exchange efficiency and air flow obstruction
Solution Approach 2:
A dedicated cooling air flow path is introduced as an intermediary system specifically for cooling the heat sink. This separate path allows the heat sink to be cooled by conditioned air without the heat sink structure obstructing the main conditioned air flow path to the passenger compartment, thereby maintaining both heat exchange efficiency and minimal pressure drop
2Adaptability or versatility
If independent temperature control for multiple zones is implemented, then passenger comfort is improved, but device complexity and packaging difficulty increase
Solution Approach 1:
The housing is segmented into two separate flow paths with a partition wall, allowing independent temperature control for different zones. Each flow path can be independently controlled to deliver conditioned air to different passenger compartment zones, enabling multi-zone climate control without requiring complex additional components
Solution Approach 2:
The two segregated flow paths serve multiple functions: they enable independent zone control for passenger comfort, provide separate routes for cooling the LPM heat sink, and allow flexible configuration of air distribution. This multi-functionality reduces overall system complexity compared to using separate independent systems for each function
3Temperature
If the heat sink is positioned to cool the LPM in a dual flow path system, then cooling effectiveness is improved, but cross-flow between zones occurs
Solution Approach 1:
A partition wall is used to segment the housing into two distinct flow paths, preventing cross-flow between zones. The LPM heat sink is positioned within one of these segregated paths, allowing effective cooling while maintaining flow path separation and preventing unwanted mixing of air streams destined for different zones
Solution Approach 2:
The partition wall acts as an intermediary structure that physically separates the two flow paths. This mediator prevents cross-flow between zones while still allowing the heat sink in one path to be effectively cooled by the conditioned air flowing through that same path, thus maintaining both cooling effectiveness and flow path stability
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 solution enables efficient cooling of the LPM heat sink while maintaining independent temperature control across multiple zones, reducing waste heat and minimizing pressure drop, thus optimizing the packaging size and flow conditions within the HVAC system.
Implementation Method 1
The heat sink is configured to exchange heat with air disposed within the heat exchange passageway to provide cooling of the linear power module
Implementation Method 2
waste heat that is generated by electrical resistance associated with the LPM
Data Source
AI summary
An air-handling system for a vehicle includes a housing defining a first flow path through which a first flow of air is configured to selectively flow and a second flow path through which a second flow of air is configured to selectively flow. A heat exchange passageway provides fluid communication between the first flow path and the second flow path within the housing. A heat sink is disposed within the heat exchange passageway and is associated with cooling a linear power module of a blower assembly disposed within the housing. The heat sink is configured to exchange heat with air disposed within the heat exchange passageway to provide cooling of the linear power module regardless of a mode of operation of the blower assembly.