Integrated Thermal Expansion Valve for One-Way Flow Control
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Solution Overview
Problem
Conventional thermal expansion valves with check valves require additional machining, leading to increased complexity, leakage risks, and high manufacturing costs, compromising operational reliability and manufacturability.
Innovation Solution
A thermal expansion valve with a one-way control function, featuring a valve body with an inlet and outlet passage, a temperature sensing component, and a second valve core component that controls fluid flow without the need for additional machining, using a coaxial accommodating portion and a second valve port to manage fluid direction, reducing the risk of leakage and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve is arranged in parallel to the thermal expansion valve, then the operational stability of the system is improved, but the device complexity and assembly costs increase
Solution Approach 1:
The patent combines the thermal expansion valve and check valve into a single integrated valve body. The valve core component includes both a first valve core for thermal expansion control and a second valve core for check valve function, eliminating the need for separate parallel components and reducing overall system complexity while maintaining operational stability
2Adaptability or versatility
If additional machining is performed on the valve body for the check valve, then the one-way control function is achieved, but the manufacturing precision requirements and leakage risks increase
Solution Approach 1:
The patent segments the valve body into distinct functional regions: an accommodating portion for the temperature sensing component and a separately formed check valve passage. This segmentation allows each region to be optimized independently, reducing the precision requirements for the entire valve body while maintaining effective one-way control functionality
3Adaptability or versatility
If the check valve and bypass passages are separately arranged, then the one-way control function is achieved, but the assembly and maintenance costs increase
Solution Approach 1:
The patent merges the check valve passage and bypass passage into a single integrated flow path within the valve body. The second valve core controls flow through this integrated passage, eliminating the need for separate bypass components and reducing assembly complexity and costs while maintaining the one-way control function
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 enhances manufacturability, reduces leakage risks, and improves operational reliability by eliminating the need for additional machining and simplifying the assembly process while maintaining effective fluid control.
Implementation Method 1
A temperature sensing component is arranged at one end of the valve body to close the inner cavity
Implementation Method 2
when refrigerant in the system flows in a forward direction (flowing from an inlet to an outlet), the check valve is closed by pressure difference and the thermal expansion valve functions; and when the refrigerant in the system flows in a reverse direction, the check valve is opened by pressure difference
Data Source
AI summary
A thermal expansion valve with one-way control function includes a valve body having an inlet passage and an out passage, a temperature sensor installed on one end of the valve body, and a first valve core component installed in an inside chamber of the valve body. The first valve core component includes a first valve core and a valve rod against the temperature sensor. The valve body also includes an accommodation component extending from said the inlet passage into the valve body and coaxially installed with the inlet passage. The accommodation component has a second valve port connected with the inside chamber. The accommodation component has a second valve core component having a supporting piece and a second valve core matching the second valve port. The processing of the structure is convenient and the assembly of the second valve core component is simple and reliable.