Thermostatic Valve Notch Flow Control for Stable Coolant Switching
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Solution Overview
Problem
Existing thermostatic control valves experience oscillation and rapid flow fluctuations during transitions between closed and open positions due to uncontrolled coolant flow through annular gaps, leading to instability and inefficiency.
Innovation Solution
A thermostatic control device with a thermostatic valve featuring integrated primary and secondary seal rings and flow regulators, which regulate coolant flow through discrete, circumferentially spaced notches, stabilizing the valve by metering flow during opening and avoiding excess flow until fully open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the thermostatic valve opens from closed position, then coolant flow increases to enable heat exchange, but uncontrolled flow through annular gaps causes oscillation and instability
Solution Approach 1:
The valve structure is segmented into multiple functional zones: primary seal ring for initial sealing, flow regulators with notches for controlled flow paths, and secondary seal ring for maintaining sealing. This segmentation allows the valve to progressively transition from closed to open state with controlled coolant flow through discrete notches rather than uncontrolled annular gaps, preventing oscillation while enabling heat exchange.
Solution Approach 2:
The flow regulators with notches are positioned to engage before the valve fully opens, preliminarily controlling the coolant flow path. The notches provide predetermined flow channels that limit flow rate during the transition phase, preventing the excessive flow that would cause oscillation. This preliminary flow control action stabilizes the valve during opening before full flow is established.
2Productivity
If the valve opens fully to allow coolant flow, then heat exchange efficiency improves, but rapid flow fluctuations occur during transition
Solution Approach 1:
The flow regulators act as an intermediary mechanism between the closed and fully open valve states. The notches in the flow regulators provide intermediate flow paths that gradually increase coolant flow during valve opening, rather than allowing abrupt full flow. This intermediary flow control mechanism smooths the transition and prevents rapid flow fluctuations, maintaining reliability while achieving heat exchange efficiency.
3Ease of operation
If uncontrolled flow passes through annular gaps, then valve opening is achieved, but excess flow causes oscillation and instability
Solution Approach 1:
The sealing and flow control properties are distributed locally across different valve components. The primary seal ring provides local sealing at the initial position, the flow regulators with notches provide localized controlled flow paths at specific circumferential positions, and the secondary seal ring provides local sealing maintenance. This local quality distribution ensures valve opening occurs through controlled notches rather than uncontrolled annular gaps, preventing oscillation while maintaining ease of operation.
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 stabilizes the valve movement and regulates coolant flow, preventing oscillation and ensuring controlled, gradual heat exchange, enhancing thermal management efficiency.
Implementation Method 1
the thermostatic valve includes a primary seal ring and metering means for allowing metered flow of the cooling fluid through the thermostatic valve during motion of the thermostatic valve from the fully closed position to the fully opened position
Implementation Method 2
control the flow of coolant fluid from a reservoir through a heat exchanging circuit
Data Source
AI summary
A thermostatic control device according to the present disclosure is configured to control the flow of coolant fluid from a reservoir through a heat exchanging circuit and/or a bypass back to a cooling circuit pump. The device controls the flow of coolant fluid based on temperature of the coolant fluid at the device. The thermostatic control device includes a thermostatic valve with notches that allow metered flow of coolant fluid to the heat exchanging circuit during opening of the thermostatic valve.