Control valve
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Solution Overview
Problem
Conventional electromagnetic valves used in refrigeration cycles lack controllability in both flow directions, leading to potential degradation in control performance due to differential pressure differences, especially during reverse flow states, and require additional components to manage flow direction changes.
Innovation Solution
A control valve design incorporating multiple differential pressure valves within the valve body ensures equal fluid pressure acting on the main valve body in both flow directions, preventing unintended operation due to differential pressure, thus maintaining controllability without increasing the number of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single electromagnetic valve is used with one differential pressure valve, then the valve structure is simple, but the valve cannot maintain controllability in both flow directions
Solution Approach 1:
Multiple differential pressure valves (first and second differential pressure valves) are integrated into a single valve body, allowing the valve to handle bidirectional flow control within one unified structure. This merging approach enables the valve to maintain controllability in both flow directions without requiring separate valve installations.
Solution Approach 2:
The valve body is designed with multiple differential pressure valves that can operate in different flow directions, making the single valve capable of performing multiple functions - controlling flow in both directions. This multi-functionality eliminates the need for installing multiple separate electromagnetic valves to handle bidirectional flow requirements.
2Device complexity
If the differential pressure valve is omitted to simplify the structure, then the valve body is simpler, but the controllability is degraded when differential pressure acts on the main valve body
Solution Approach 1:
Multiple differential pressure valves are combined within a single valve body, maintaining structural simplicity while ensuring reliable controllability. The integrated design allows the valve to compensate for differential pressure effects in both flow directions without adding excessive complexity to the overall valve structure.
Solution Approach 2:
The valve design incorporates multiple differential pressure valves with different characteristics to balance and equalize the fluid pressure acting on the main valve body in both flow directions. By adjusting the parameters of these differential pressure valves, the system maintains controllability while managing the complexity of the valve body structure.
3Adaptability or versatility
If electromagnetic valves are installed in parallel with different directions to handle flow direction changes, then bidirectional flow control is achieved, but the number of parts and installation complexity increases
Solution Approach 1:
A single electromagnetic valve is designed with multiple differential pressure valves that enable it to control flow in both directions, replacing the need for installing multiple separate electromagnetic valves. This universal design allows one valve to perform the function that previously required multiple valves, reducing part quantity and installation complexity.
Solution Approach 2:
The functionality of multiple electromagnetic valves installed in parallel is merged into a single electromagnetic valve with an integrated multi-directional control mechanism. The first and second differential pressure valves work together within one valve body to achieve bidirectional flow control, consolidating what would have been separate valve installations into one unit.
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 design ensures consistent controllability in both flow directions by balancing fluid pressure across the main valve body, preventing differential pressure-induced operational deviations and simplifying the valve configuration, while reducing the overall size and part count.
Implementation Method 1
differential pressure valves operated in response to a front/rear differential pressure are respectively disposed between the first inlet/outlet and the first side portion opening, between the second inlet/outlet and the second side portion opening between the first inlet/outlet and the bottom portion opening, and between the second inlet/outlet and the bottom portion opening inside the valve body
Data Source
AI summary
[Object] Provided is a control valve capable of ensuring controllability in both flows without increasing the number of parts.[Solving Means] A plurality of differential pressure valves 50, 60, 70, and 80 are disposed inside a valve body 10 so that a fluid pressure acting on a main valve body 20 disposed inside a main valve chamber 13 becomes the same in a flow of both directions including one direction from a first inlet/outlet 11 to a second inlet/outlet 12 through the main valve chamber 13 and the other direction from the second inlet/outlet 12 to the first inlet/outlet 11 through the main valve chamber 13.