Cooling Circuit Deaeration Chamber for Air Bubble Separation
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Solution Overview
Problem
Existing cooling systems face inefficiencies in separating air bubbles from coolant due to counteracting coolant flow directions, which can lead to increased pressure and require costly, space-consuming deaeration lines.
Innovation Solution
A deaeration device with a deaeration chamber having a larger cross-section than the feed pipe, where the coolant inlet and first outlet are spaced apart, and the second outlet is positioned higher than the inlet relative to gravity, promoting air bubble migration towards the second outlet, facilitated by a controlled coolant flow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coolant flows through the deaeration chamber to separate air bubbles, then air bubbles can be removed from the coolant, but the coolant flow may counteract the upward migration of air bubbles, reducing deaeration efficiency
Solution Approach 1:
The deaeration device is segmented into multiple chambers: a first deaeration chamber for initial air bubble separation and a second deaeration chamber for further deaeration. This segmentation allows different flow patterns and deaeration mechanisms to operate in each chamber, resolving the contradiction between coolant flow and air bubble migration by providing dedicated zones for each function.
Solution Approach 2:
A bypass channel is introduced as an intermediary element that allows a portion of the coolant to flow directly from the first deaeration chamber to the second deaeration chamber, bypassing the pump. This creates a separate flow path that does not counteract air bubble migration, enabling efficient deaeration while maintaining overall coolant circulation.
2Reliability
If conventional deaeration lines are used to connect the cooling circuit to the expansion tank, then air bubbles can be effectively removed, but the system becomes costly and space-consuming
Solution Approach 1:
The deaeration device is merged with the existing cooling circuit components (pump and expansion tank) to form an integrated deaeration system. The deaeration chambers are positioned within the cooling circuit loop, eliminating the need for separate deaeration lines connecting to the expansion tank, thereby reducing system complexity and space requirements.
Solution Approach 2:
The deaeration device performs multiple functions: it separates air bubbles from coolant, maintains coolant circulation, and integrates with the expansion tank system. This multi-functionality eliminates the need for dedicated deaeration lines, as the cooling circuit itself is utilized for deaeration purposes.
3Reliability
If the deaeration chamber has a larger cross-section than the feed pipe, then air bubbles have more space to migrate towards the outlet, but the device becomes larger and more space-consuming
Solution Approach 1:
The deaeration function is segmented across two separate chambers rather than requiring one large chamber. Each chamber has a manageable size, but together they provide sufficient volume for effective air bubble separation. This segmentation reduces the volume of any single component while maintaining overall deaeration efficiency.
Solution Approach 2:
The deaeration process is extended in the longitudinal dimension by using two sequential chambers rather than increasing the cross-sectional area of a single chamber. This dimensional approach allows adequate deaeration volume without excessive increase in device footprint.
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
Efficient separation of air bubbles is achieved with reduced pressure drop and simplified construction, allowing for cost-effective deaeration without the need for additional lines.
Implementation Method 1
The cross-sectional dimension of the deaeration chamber is larger than the cross-sectional dimension of the feed pipe to thereby allow air bubbles carried along with coolant flowing through the feed pipe to enter the deaeration chamber via the coolant inlet and thereafter migrate in the deaeration chamber to the second coolant outlet
Implementation Method 2
The coolant flow in the deaeration chamber between the coolant inlet and the first coolant outlet is directed in a direction that promotes the migration of air bubbles in the deaeration chamber towards the second coolant outlet
Implementation Method 3
Absorbed heat may be emitted from the circulating coolant to the surroundings via a radiator which is provided in the cooling circuit and arranged at the front end of the vehicle, wherein coolant flowing through the radiator is cooled by means of ambient air
Implementation Method 4
a coolant pump for circulating coolant in the cooling circuit
Data Source
AI summary
A cooling system is disclosed having a cooling circuit with a deaeration device arranged in the cooling circuit for separation of air bubbles from coolant circulating in the coolant circuit. The deaeration device includes a deaeration chamber having a coolant inlet connected to a feed pipe of the cooling circuit, a first coolant outlet connected to a coolant pump of the cooling circuit, and a second coolant outlet connected to an expansion tank via a static line. The deaeration chamber has a larger cross-sectional dimension than the feed pipe. The second coolant outlet is located in a position in relation to the coolant inlet and the first coolant outlet such that the coolant flow in the deaeration chamber between the coolant inlet and the first coolant outlet will move migrating air bubbles in the longitudinal direction of the deaeration chamber towards the second coolant outlet.