Hydraulic system for an installation for heating and generating domestic hot water
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic systems for heating and domestic hot water distribution rely on motorized three-way valves that require electrical energy, which increases costs and complexity, and do not effectively manage hydraulic performance or prevent water hammering.
Innovation Solution
A non-motorized three-way valve system that operates solely on hydraulic energy, utilizing a movable support with elastic return means and a flexible conical or sliding ring obstructing member to switch between positions based on pump pressure, eliminating the need for electrical energy and reducing costs and water hammering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If motorized three-way valves are used to direct water flow, then the valve can be controlled to switch between positions, but electrical energy is required which increases costs and complexity
Solution Approach 1:
The valve system uses itself to switch positions by utilizing the hydraulic energy already present in the water flow. The movable support and obstructing member automatically respond to pressure changes without external electrical control, making the system self-regulating and eliminating electrical energy requirements for valve operation.
Solution Approach 2:
The invention replaces motorized actuation with hydraulic actuation. The movable support is driven by water pressure acting on it, and the obstructing member is moved hydraulically to seal against different seats, converting the control mechanism from electrical to purely hydraulic operation.
2Use of energy by moving object
If non-motorized three-way valves are used to eliminate electrical energy, then energy costs are reduced, but the valve switching mechanism becomes less reliable and may cause water hammering
Solution Approach 1:
The elastic force return means (springs) are pre-loaded to provide a cushioning effect during valve switching. When the movable support moves to change valve position, the springs absorb and dissipate the kinetic energy, preventing water hammering and ensuring smooth, reliable transitions between positions without electrical control.
Solution Approach 2:
The system changes the physical state parameters of the water flow (pressure and velocity) to control valve positioning. By utilizing natural pressure differentials in the hydraulic system and elastic potential energy storage in springs, the valve responds reliably to flow conditions without requiring external electrical signals.
3Ease of operation
If motorized three-way valves are used, then precise control is achieved, but the device complexity and cost increase
Solution Approach 1:
The invention extracts and removes the electrical motor and control electronics from the valve system, retaining only the essential hydraulic components. The movable support, obstructing member, and spring return mechanism constitute a simplified mechanical-hydraulic system that achieves precise control without any electrical parts, reducing both complexity and cost.
Solution Approach 2:
The invention replaces the electrical-mechanical conversion system (motor driving valve) with a direct hydraulic-mechanical system where water pressure directly moves the valve components. This substitution eliminates the need for electrical motors, gearboxes, and control circuits while maintaining precise valve positioning through hydraulic pressure balance and elastic force.
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 system provides a simple, reliable, and cost-effective solution for directing water flow between heating circuits without electricity, improving hydraulic performance and preventing water hammering, while maintaining operational efficiency comparable to motorized valves.
Implementation Method 1
return means associated with the movable support, which produce an elastic force to bias the movable support towards an intermediate position between the opposed seats of the three-way valve
Implementation Method 2
a three-way valve responsive to pressure produced by a circulation pump
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
Hydraulic system (A) comprising a three-way valve (8), the three-way valve comprising a first port (2) for the connection to a primary heat exchanger (21) through the circulation pump (7), a second port (3) and a third port (4) for connection to the heating circuit (22, 24) and to a secondary heat exchanger (25), respectively. The three-way valve (8) is switchable between two positions in which the first port (2) is in fluid communication with the second port (3) or with the third port (4). The three-way valve is responsive to the pressure applied by a circulation pump (7), and has a displaceable obstructing member that may be moved due to transitions between an off-state and an on-state of the circulation pump (7). The obstructing member (83; 183; 283) comprises a pair of sealing surfaces (83c, 83c; 183b, 183c; 283b, 283c) facing away from each other and suitable to engage reciprocatingly respective opposed seats (81d, 81e; 181d, 181e; 281d, 281e) of the three-way valve (8).