Evaporator Outlet Manifold Structure to Prevent Coolant Dead Zones
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Solution Overview
Problem
Conventional evaporators experience dead zones at the outlet end-plate, leading to incomplete discharge of coolant and noise generation due to whirling phenomena, which increases pressure loss and reduces flowing speed.
Innovation Solution
Incorporation of a coolant movement preventing part, such as a closed space or flat hermetic part, at the outlet end-plate and manifold to isolate the downstream side of the outlet manifold from the coolant flow, preventing the formation of dead zones and ensuring smooth discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outlet manifold is designed with a conventional symmetric structure, then the manufacturing is simplified, but dead zones are formed at the downstream side causing coolant to whirl and reducing discharge efficiency
Solution Approach 1:
The outlet manifold is designed with an asymmetric structure where the downstream side is specifically modified to prevent dead zone formation. The coolant movement preventing part creates an asymmetric flow path that eliminates whirlpool formation while maintaining manufacturability through standardized components.
Solution Approach 2:
The downstream side of the outlet manifold is effectively separated from the main coolant flow path by introducing a coolant movement preventing part. This extraction isolates the problematic dead zone area, preventing coolant from entering and whirling in that region while maintaining the overall manifold structure.
2Device complexity
If the outlet manifold allows free flow on the downstream side, then the device complexity is reduced, but noise is generated due to whirling phenomenon and floating cavity formation
Solution Approach 1:
The harmful whirling flow is extracted and isolated from the main coolant path by the coolant movement preventing part. This separation prevents the formation of floating cavities and noise-generating vortexes without significantly complicating the manifold structure.
Solution Approach 2:
The design converts the potential harm of dead zone formation into a beneficial flow control mechanism. The coolant movement preventing part transforms what would be a noise-generating whirlpool into a controlled flow path that maintains smooth coolant discharge.
3Device complexity
If the coolant flows through the downstream side of the outlet manifold, then the flowing path is simplified, but pressure loss increases due to whirling and reduced flowing speed
Solution Approach 1:
The problematic downstream flow path is extracted and isolated from the main coolant circulation. The coolant movement preventing part creates a clear separation, directing coolant through an optimized path that minimizes pressure loss while maintaining flow path simplicity.
Solution Approach 2:
Instead of allowing coolant to flow freely through the downstream side, the design inverts the approach by actively preventing coolant movement in that region. This reversal of the conventional flow pattern eliminates the whirling phenomenon and associated pressure losses.
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
Prevents the formation of dead zones, allowing for complete coolant discharge without congestion and reduces noise generation by maintaining high flowing speed and reducing pressure loss.
Implementation Method 1
the outlet manifold and the outlet end-plate have the flowing path of coolant defined thereby
Implementation Method 2
the outlet manifold and/or the outlet end-plate, connected with the outlet manifold, has the coolant movement preventing part which prevents the formation of the dead zone in which the coolant from the tank communicated with the adjacent tube flowed a downstream side of the outlet manifold and then whirled therein
Implementation Method 3
An evaporator is an apparatus for increasing a temperature of the coolant condensed and liquidized by a condenser so as to evaporate the coolant
Implementation Method 4
the evaporated coolant heated during the ciculation in the evaporator
Implementation Method 5
the coolant condensed and liquidized by a condenser
Data Source
AI summary
An evaporator comprises tubes, configured for coolant flow, stacked in regularly spaced relation to one another, each of the tubes formed by coupled tube plates. Also comprising a tank in fluid communication with the tubes at an upper or lower side; inlet and outlet end-plates which respectively have an inflow part and an outflow part at an upstream side of coolant flow and positioned at respective end sides of the stacked tubes; and inlet and outlet manifolds in fluid communication with the tank and coupled to the inflow and outflow parts to define a coolant flow passage. The outlet manifold has a coolant movement preventing part isolating a rear portion from the coolant flow passage and comprises a closed space formed by joining the outlet end-plate and the outlet manifold to prevent formation of a dead zone where the coolant from the tank flows into a downstream side of the outlet manifold and is whirled therein.