Pressure Reducing Valve With Drain Diversion for Inlet Pressure Spikes
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Solution Overview
Problem
Conventional pressure reducing valves struggle with controlling fluid flow when large amounts of fluid enter, leading to internal pressure increases that can damage the valve and downstream components due to their complex structure and inability to divert excess fluid.
Innovation Solution
A pressure reducing valve with a plunger and sub-diaphragm system that diverts excess fluid to a drain port when inlet pressure exceeds a threshold, using elastic members to control fluid flow and prevent damage by allowing diversion through a drain port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a configuration for controlling fluid flow is added to handle large amounts of fluid, then the ability to control fluid flow is improved, but the structure becomes complicated and the overall volume becomes excessively large
Solution Approach 1:
The pressure regulating body is designed to perform multiple functions: it regulates pressure through elastic deformation and simultaneously controls fluid flow by blocking the communication hole when pressed against it by the plunger. This multi-functionality eliminates the need for separate control mechanisms, resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The invention merges the pressure regulation function and flow control function into a single integrated pressure regulating body. The plunger, operating rod, and diaphragm work together as a unified mechanism that simultaneously manages both pressure and flow, reducing overall structural complexity while maintaining versatility.
2Adaptability or versatility
If the pressure regulating body instantaneously blocks the flow into the second chamber when large amounts of fluid are introduced, then flow control is achieved, but the internal pressure increases to a high-pressure state that deteriorates durability
Solution Approach 1:
The plunger acts as an intermediary between the first chamber and the communication hole. Instead of the pressure regulating body directly blocking the communication hole, the plunger is pressed against it by the operating rod, which is driven by the diaphragm responding to pressure changes. This intermediary mechanism provides gradual, controlled flow restriction rather than instantaneous blocking, preventing dangerous pressure spikes while maintaining flow control capability.
Solution Approach 2:
The elastic member (diaphragm) provides beforehand cushioning by deforming in response to pressure changes in the first chamber before the pressure can build up to dangerous levels. This elastic deformation absorbs excess pressure energy and triggers the plunger to gradually restrict flow, preventing the high-pressure state that would deteriorate durability.
3Productivity
If only a fixed amount of fluid is discharged through the outlet when large amounts of fluid are temporarily introduced, then flow rate stability is maintained, but the internal pressure rises to a high-pressure state that causes damage to downstream components
Solution Approach 1:
The invention introduces dynamic flow control through the plunger and operating rod mechanism. When large amounts of fluid are temporarily introduced, the diaphragm deforms and the operating rod presses the plunger against the communication hole to dynamically restrict flow. This dynamic response maintains flow rate stability at the outlet while preventing pressure buildup that would damage downstream components, unlike fixed flow control mechanisms.
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 damage to the valve and downstream components by diverting excess fluid, maintaining smooth operation by flexibly controlling fluid flow based on pressure changes.
Implementation Method 1
a sub-diaphragm which selectively comes into close contact with the operating rod depending on a pressure of water introduced through the inlet
Implementation Method 2
an elastic member that applies elastic force to the operating rod
Data Source
AI summary
The present invention relates to a pressure reducing valve and to a bidet and a water purifier comprising same. In particular, the pressure reducing valve, according to one embodiment of the present invention, comprises: a valve body that provides a water inlet, a water outlet, a drain port for draining water to the outside, and a communication flow channel which provides a passage for water introduced from the inlet to flow to the outlet or the drain port; a plunger that operates so as to be in a discharge state which allows water introduced from the inlet to flow to the outlet or in a blocking state which blocks water introduced from the inlet from flowing to the outlet; an operating rod that selectively communicates the inlet and the outlet by selectively coming into close contact with the communication flow channel; and a sub-diaphragm that selectively communicates the inlet and the drain port by selectively coming into close contact with the operating rod according to the pressure of water introduced from the inlet. The pressure reducing valve may be in a normal open state and a safe operating state depending on the condition of the sub diaphragm.