Pressure Independent Control Valve Modular Insert Design
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Solution Overview
Problem
Conventional pressure independent control valves in multi-zone heating and cooling systems face issues with pressure changes causing overflow or underflow, requiring complex and costly specialized components for flow regulation.
Innovation Solution
The design incorporates a first and second insert element within the valve body, utilizing thermostatic radiator valve inserts to regulate flow, with a sealing groove and inclined ribs to control differential pressure and eliminate hysteresis, allowing for standard component usage and easy flow modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional two-way valves are used in multi-zone heating and cooling systems, then the system structure is simple, but pressure changes cause overflow or underflow resulting in inconsistent flow rates
Solution Approach 1:
The valve is divided into distinct functional modules: a valve body providing inlet and outlet sections, a middle section with upstream and downstream chambers, and separate first and second functional groups. This segmentation allows each component to perform its specific function independently, achieving reliable flow rate control through modular design.
Solution Approach 2:
The middle section acts as an intermediary between the inlet and outlet sections, containing upstream and downstream chambers that mediate pressure regulation. The adjustment orifice in the first functional group serves as an intermediary mechanism to control differential pressure, ensuring consistent flow rates despite pressure changes in the system.
2Manufacturing precision
If specialized components are produced for pressure independent control valves, then flow regulation precision is improved, but production costs increase
Solution Approach 1:
The valve design incorporates universal components that can serve multiple functions. The valve body with standardized inlet and outlet sections can accommodate different functional groups for various flow rate requirements. The middle section structure is universal and can be used across different valve configurations, reducing manufacturing costs through economies of scale.
Solution Approach 2:
Flow regulation precision is achieved by changing parameters of existing components rather than creating entirely new specialized parts. The adjustment orifice parameters, chamber volumes, and functional group characteristics can be modified to achieve different flow rates, allowing precise control using standard manufacturing processes.
3Adaptability or versatility
If flow modifications are realized by different second functional groups, then flow rate adaptability is improved, but device complexity and component quantity increase
Solution Approach 1:
The second functional group is designed as a universal component that can be configured for different flow rate requirements. Rather than creating entirely different valve bodies for each application, the same valve body and middle section structure can accommodate various second functional groups, achieving flow rate adaptability without proportionally increasing overall device complexity.
4Reliability
If an inclined central section is used to provide the adjustment orifice, then pressure differential control is improved, but production costs and manufacturing complexity increase
Solution Approach 1:
The inclined central section is segmented into the middle section providing chambers and the first functional group providing the adjustment orifice. This segmentation allows the inclined geometry to be achieved through standardized manufacturing processes for separate components that are then assembled, reducing overall manufacturing complexity while maintaining pressure differential control reliability.
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
This solution reduces production costs, simplifies flow regulation, and ensures consistent flow rates by using widely available thermostatic radiator valve inserts, effectively addressing pressure-related issues in heating and cooling systems.
Implementation Method 1
An outer wall section of the first insert element provides a groove accommodating a sealing element, wherein said groove is running diagonally around said outer wall section so that the sealing element accommodated within said groove seals the upstream chamber against the downstream chamber.
Data Source
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AI summary
Pressure independent control valve (10) for controlling the flow of a liquid medium, comprising a valve body (11) providing: an inlet section (12), an outlet section (13), a middle section (14) positioned between the inlet section (12) and the outlet section (13), wherein an upstream chamber (15) and a downstream chamber (16) being in communication with each other through an adjustment orifice (17) are provided with the middle section (14); a first functional group defined by a control device (18) for controlling a differential pressure within the pressure independent control valve (10); and a second functional group defined by an adjustment device (19) suitable for increasing and/or decreasing the liquid flow through the adjustment orifice (17). The pressure independent control valve (10) comprises a first insert element (21) providing the adjustment orifice (17) being at least partially positioned within the middle section (14) of the valve body (11), wherein said first insert element (21) is placed within the middle section (14) of the valve body (11) through a first opening (23) of the valve body (11) provided at a first side of the middle section (14), wherein the control device (18) providing the first functional group is at least partially accommodated with said first insert element (21). The pressure independent control valve (10) further comprises a second insert element (22) being at least partially positioned within the middle section (14) of the valve body (11), wherein said second insert element (22) is placed within the middle section (14) of the valve body (11) through a second opening (24) of the valve body (11) provided at a second, opposite side of the middle section (14), wherein the adjustment device (19) providing the second functional group is at least partially accommodated with said second insert element (22). Fig. 2