Thermostatic Ball Valve Drive for Faster Coolant Flow Control
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Solution Overview
Problem
Traditional thermostatic wax valve actuators in internal combustion engine cooling systems have slower response times and a limited operational temperature range compared to electronic actuators, requiring manual or complex electronic controls for temperature regulation.
Innovation Solution
A thermostatic valve assembly integrating a wax element with a ball valve component, where a plunger with a partially flattened oval drive opening moves linearly due to wax expansion and contraction, rotating the ball valve to control fluid flow automatically based on temperature changes, utilizing a return spring for precise operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional thermostatic wax valve actuators are used, then the system is simple and reliable, but the response time is slow and the operational temperature range is limited
Solution Approach 1:
The patent combines the wax element actuator with a ball valve component into an integrated assembly. The linear motion from the wax element is directly coupled to the rotational motion of the ball valve through a plunger and drive mechanism, creating a unified system that maintains the reliability of wax actuators while improving response time through direct mechanical coupling.
Solution Approach 2:
The invention introduces a dynamic ball valve component that rotates in response to wax element expansion and contraction. This dynamic element allows for faster flow control compared to traditional gate or globe valves, as the ball valve can quickly transition between open and closed positions, thereby improving the overall response time of the thermostatic control system.
2Device complexity
If traditional thermostatic wax valve actuators are used, then the structure is simple, but the operational temperature range is limited
Solution Approach 1:
The patent employs a composite design combining the wax element with a metal ball valve assembly. This composite structure allows the system to operate across a broader temperature range by leveraging the thermal properties of both the wax element (for actuation) and the metal components (for structural integrity at varying temperatures), thereby extending the operational temperature range without significantly increasing complexity.
3Measurement precision
If manual or complex electronic controls are used for temperature regulation, then the temperature control precision is improved, but the device complexity and cost increase
Solution Approach 1:
The thermostatic valve assembly operates on a self-service principle where the wax element automatically expands and contracts in response to temperature changes, directly actuating the ball valve to control fluid flow. This eliminates the need for external electronic sensors, controllers, or power sources, maintaining simplicity while achieving precise temperature control through the inherent thermal-responsive properties of the wax material.
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 provides efficient, automatic, and precise control of fluid flow, enhancing durability and reliability by converting linear motion from wax expansion/contraction into rotational motion of the ball valve, optimizing coolant flow for faster engine heating and temperature regulation.
Implementation Method 1
One type of thermostatic valve uses a wax element that expands or contracts in response to temperature changes to control fluid flow
Implementation Method 2
converting linear motion from wax expansion/contraction into rotational motion of the ball valve
Data Source
AI summary
Disclosed is a thermostatic valve assembly having a valve body with a chamber, an inlet port, a first output port, and a second output port. The thermostatic assembly includes a wax element, a ball valve component with a drive pin, and a plunger with a drive opening to receive the drive pin. The drive opening has a partially flattened oval profile with an upper flat section and curved ends, and a lower curve connected to the upper portion. The plunger is connected to the wax element, slideably secured within the chamber, and moves between a first and second linear position. The ball valve component is rotatably secured within the chamber and moves between a first rotational position when the plunger is in the first linear position and a second rotational position when the plunger is in the second linear position.