Bi-directional Pressure Control Valve for Scroll Compressor
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Solution Overview
Problem
Conventional check valves require complex and expensive arrangements of solenoid valves and pressure sensors to achieve bi-directional fluid flow based on pressure differences, which is not cost-effective or simple in structure.
Innovation Solution
A pressure control valve with a valve seat and two disc members that open in response to specific pressure differences, allowing fluid flow in both directions, is integrated into a scroll compressor to optimize operating performance and reduce complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solenoid valve and pressure sensors are used to achieve bi-directional fluid flow control, then the pressure control function is improved, but the device complexity and cost increase
Solution Approach 1:
The pressure control valve uses the pressure difference of the fluid itself to drive the opening and closing of the valve disc, eliminating the need for external solenoid valves and pressure sensors. The valve automatically responds to pressure changes and controls fluid flow direction without requiring additional control systems or energy input.
Solution Approach 2:
The invention extracts and eliminates the complex solenoid valve and pressure sensor components from the system, retaining only the essential pressure differential mechanism. By removing these unnecessary components, the system achieves bi-directional flow control with a simple mechanical structure that relies on inherent pressure differences.
2Reliability
If a solenoid valve and pressure sensors are used to achieve bi-directional fluid flow control, then the pressure control function is improved, but the cost increases
Solution Approach 1:
The pressure control valve uses the pressure difference of the fluid itself to drive the opening and closing of the valve disc, eliminating the need for external solenoid valves and pressure sensors. The valve automatically responds to pressure changes and controls fluid flow direction without requiring additional control systems or energy input.
Solution Approach 2:
The invention replaces expensive electronic components (solenoid valves and pressure sensors) with a simple, inexpensive mechanical pressure differential mechanism. This mechanical solution is cost-effective and easier to manufacture while achieving the same bi-directional flow control function.
3Device complexity
If a conventional check valve is used, then the structure is simple, but the valve cannot open in both directions based on pressure difference
Solution Approach 1:
The pressure control valve employs a dynamic design where the valve disc can move in both directions based on pressure differential. Unlike a conventional fixed-direction check valve, this design allows the valve to adapt its flow direction dynamically according to the instantaneous pressure conditions on either side of the valve disc.
Solution Approach 2:
The valve structure integrates both check valve functionality and pressure differential control in a single device. The valve disc can respond to pressure differences from either direction, providing universal bidirectional flow control capability 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 pressure control valve enables bi-directional fluid flow according to predetermined pressure differences, reducing pressure fluctuations and wear in the scroll compressor, while simplifying the structure and lowering manufacturing costs.
Implementation Method 1
When a pressure difference across the first valve disc member and the second valve disc member is directed to the first direction and is greater than or equal to a first predetermined value, the first valve disc member is opened to allow fluid to flow through the pressure control valve; and when the pressure difference across the first valve disc member and the second valve disc member is directed to a second direction opposite to the first direction and is greater than or equal to a second predetermined value, the second valve disc member is opened to allow fluid to flow through the pressure control valve.
Data Source
AI summary
A pressure control valve (100, 200) comprises a valve seat (140, 160) in which is formed a valve hole (142, 162), a first valve sheet member (110, 210) which covers the valve hole and is provided with a fluid passage (118, 218) thereon, and a second valve sheet member (120, 220) which is provided between the valve seat and the first valve sheet member and covers the fluid passage. Wherein, given that the direction directed from the second valve sheet member to the first valve sheet member is a first direction, when the pressure difference across two sides of the first valve sheet member and the second valve sheet member is directed to the first direction and is greater than or equal to a first preset value, the first valve sheet member is opened; when the pressure difference is directed to a second direction opposite to the first direction and is greater than or equal to a second preset value, the second valve sheet member is opened. Also disclosed is a scroll compressor comprising the pressure control valve. Also disclosed is a scroll compressor comprising a throttle valve for preventing or weakening the return flow from the back-pressure chamber to the pressure chamber.