HVAC Housing Drainage Layout for Corrosion-Resistant Heat Exchange
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Solution Overview
Problem
Existing HVAC systems in motor vehicles are prone to failure due to corrosion, moisture, and sludge accumulation, which can lead to performance drops and damage to electric components.
Innovation Solution
The proposed air conditioning system incorporates a housing with a second fluid circuit, a heat exchanger encapsulated within the housing, and a blower motor located below the heat exchanger. The system includes condensation fluid and filter fluid evacuation circuits with dedicated openings to gravitationally guide fluids out of the system, reducing the risk of corrosion and moisture-related issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the heater core is buried under the dashboard to save space, then the HVAC system compactness is improved, but the difficulty of replacing it in case of failure increases
Solution Approach 1:
The patent divides the HVAC system into separable modules: the heater core assembly can be independently removed from the housing, allowing it to be replaced without dismantling the entire HVAC unit. This modular segmentation resolves the contradiction by maintaining compact installation while enabling easy component replacement.
2Reliability
If the HVAC system includes comprehensive fluid evacuation circuits to prevent corrosion, then the system reliability is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple fluid evacuation functions into a single integrated circuit that handles both condensation fluid from the heat exchanger and filter fluid from the filtering compartment. This merged circuit reduces the number of separate components while maintaining comprehensive protection against corrosion and moisture, thus improving reliability without proportionally increasing complexity.
3Productivity
If the blower motor is positioned below the heat exchanger to improve fluid circulation, then the heat exchange efficiency is improved, but the risk of moisture accumulation in the blower housing increases
Solution Approach 1:
The patent extracts the blower motor from direct exposure to moisture-prone areas by positioning it below the heat exchanger and providing a dedicated evacuation circuit for the blower housing. This separation takes out the motor from the harmful moisture environment while maintaining its functional position for efficient fluid circulation, thus preserving productivity while reducing harmful factor exposure.
4Reliability
If the system includes multiple dedicated openings for different fluid evacuation paths, then the effectiveness of fluid removal is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent designs the housing with multi-functional openings that serve multiple purposes: the first opening evacuates condensation fluid from the heat exchanger, the second opening evacuates filter fluid from the filtering compartment, and the blower housing opening provides drainage for the motor area. Each opening is strategically positioned to handle different fluid sources, providing effective multi-path evacuation while being integrated into the housing structure to minimize manufacturing complexity.
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 design enhances the system's resistance to corrosion and moisture, improves efficiency by shortening fluid paths, reduces the number of components, and decreases overall system weight, thereby extending the lifespan and performance of the HVAC system.
Implementation Method 1
an air conditioning system for heat exchange between at least a first fluid and a second fluid
Implementation Method 2
a blower housing with a blower motor configured to accelerate the second fluid circulation through the second fluid circuit
Implementation Method 3
at least one condensation fluid evacuation circuit for condensation fluid that condenses on the surface of the heat exchanger
Implementation Method 4
at least one first opening configured to evacuate the condensation fluid from the housing
Data Source
Figure 1
AI summary
The object of the invention is, among others, an air conditioning system 1 for heat exchange between at least a first fluid and a second fluid comprising: a housing 100 comprising at least one second fluid inlet 110, at least one second fluid outlet 120, and a second fluid circuit 115 provided between the second fluid inlet 110 and the second fluid outlet 120; at least one heat exchanger 200 for the first fluid comprising a first fluid circuit, wherein the heat exchanger 200 is at least partially encapsulated within the housing 100; a blower housing 300 with a blower motor 310 configured to accelerate the second fluid circulation through the second fluid circuit, wherein the blower housing 300 is at least partially encapsulated within the housing 100 so that the blower motor 310 is located at the lower level than the heat exchanger 200, wherein each level is measured with respect to gravitational force Fg affecting the air conditioning system 1, characterised in that the housing 100 comprises at least one filtering compartment 400 located in the vicinity of the second fluid inlet 110, wherein the filtering compartment 400 further comprises at least one filtering means 410, at least one filter fluid evacuation circuit 420 for at least condensation fluid that condenses on the surface of the filtering means 410, and at least one second opening 102 configured to evacuate the filter fluid from the housing 100, wherein the second opening 102 is fluidly connected to the filtering compartment 400.