Pressure-Responsive Air Supply Valve for Backflow Blocking
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Solution Overview
Problem
Conventional vehicle valves fail to prevent backflow of air or gas effectively, especially when high pressure is generated in the opposite direction of air supply, leading to partial opening and reverse gas flow.
Innovation Solution
An air supply valve with a backflow prevention function, featuring a housing with a motor, a driver with a gear part and converter for linear motion, and a valve module with a shielding part that moves relative to a support and stem, closing the outlet under backflow pressure greater than the elastic force, ensuring effective prevention of backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional valve plate structure is used, then the valve is easy to open, but the valve plate partially opens under high backflow pressure allowing gas to flow backward
Solution Approach 1:
The valve module is designed to dynamically respond to pressure differentials. Under normal operation, the valve module remains in a first position (open state). When backflow pressure exceeds a predetermined threshold, the valve module automatically transitions to a second position (closed state), and vice versa when supply pressure exceeds backflow pressure. This dynamic adaptation resolves the contradiction by making the valve's opening/closing behavior conditional on pressure conditions rather than fixed.
Solution Approach 2:
The system changes the operational parameters of the valve based on pressure conditions. The valve module's position parameter is changed from a static state to a dynamic state that responds to pressure differentials. By monitoring and responding to pressure parameter changes, the valve maintains reliability during backflow while preserving ease of operation during normal supply conditions.
2Reliability
If the valve plate is designed to close firmly under high pressure, then backflow is prevented, but the valve becomes difficult to open
Solution Approach 1:
The valve module's position is made dynamic rather than static. It automatically transitions between open and closed states based on real-time pressure differential detection. This resolves the contradiction by ensuring the valve is firmly closed only when necessary (under backflow conditions) while remaining easily open during normal supply conditions, eliminating the need for a permanently high-force closing design.
Solution Approach 2:
The valve module performs self-service by automatically responding to pressure conditions without external intervention. The pressure differential itself drives the valve module between positions, eliminating the need for additional actuation mechanisms that would complicate opening. The system serves itself by using the pressure conditions to control its own state.
3Ease of manufacture
If a simple valve structure is used, then manufacturing is easy, but the valve cannot prevent backflow under high pressure
Solution Approach 1:
The valve is segmented into distinct functional components: a valve body, a valve module with movable shielding part, and a pressure-responsive mechanism. This segmentation allows each component to be manufactured separately using standard processes while the assembled system achieves backflow prevention functionality that would be complex to integrate into a simple monolithic structure.
Solution Approach 2:
The valve module acts as an intermediary element between the supply flow path and the outlet. It mediates the flow control function by responding to pressure differentials and adjusting its position accordingly. This intermediary mechanism enables backflow prevention without requiring complex structural modifications to the entire valve assembly, maintaining ease of manufacture while achieving reliability.
4Device complexity
If the valve module uses only elastic force to maintain position, then the structure is simple, but it cannot maintain firm closed state under large backflow pressure
Solution Approach 1:
The valve module utilizes pneumatic pressure differentials to control its position. When backflow pressure exceeds supply pressure, the pressure differential forces the valve module into the closed position. This pneumatic control mechanism provides firm closing under large backflow pressures without requiring complex mechanical locking structures, maintaining relative simplicity while achieving reliability.
Solution Approach 2:
The system changes the force balance parameter governing valve module position. Instead of relying solely on elastic force, the system introduces pressure differential as a controlling parameter. The valve module's position is determined by the balance between elastic restoring force and pressure differential force, enabling firm closed state under high backflow pressure while maintaining structural simplicity.
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 maintains a firm open and closed state under large pressures, prevents stem separation, and effectively blocks backflow, ensuring reliable air supply and exhaust management.
Implementation Method 1
an elastic part configured to elastically support the shielding part against the support
Implementation Method 2
the shielding part is lowered according to a larger air pressure than elastic force of the elastic part, applied from an upper part of the shielding part, and is raised according to a pressure of backflow air applied from a lower part of the shielding part
Data Source
AI summary
The present disclosure relates to an air supply valve having a backflow prevention function and a valve module, for preventing backflow of air or gas through an outlet. The air supply valve includes a housing that includes a motor mounted therein and in which a supply flow path and an outlet of air are formed, a driver including a gear part for transmitting driving force of the motor and a converter for converting rotation of the gear part to linear motion, and a valve module that is coupled to an end of the converter and is opened while being spaced apart from the outlet of the housing to be connected to the supply flow path or is closed while being in contact with the outlet.