Linear Bidirectional Electromagnetic Valve Flow Separation
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Solution Overview
Problem
Conventional solenoid valves in heat pump systems require complex structures and high costs due to the need for two one-way valves in series to achieve two-way communication, which complicates the system and reduces reliability, especially when a large flow rate is required, leading to decreased valve opening capacity and increased power consumption.
Innovation Solution
A linear two-way solenoid valve design where the stroke of the piston is separated from the travel of the pilot valve head, allowing for increased flow rates without affecting valve opening capacity or coil size, featuring internally arranged flow channels and a simplified pilot valve head structure, eliminating the need for guide rods and complex machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the stroke of the piston is increased to achieve large flow rate, then the flow rate is improved, but the valve height and power consumption increase
Solution Approach 1:
The valve is divided into two independent functional parts: the piston stroke (for flow control) and the pilot valve head travel (for valve opening). This segmentation allows the piston stroke to be increased for larger flow rate without proportionally increasing the valve height, as the pilot valve head travel remains separate and can be optimized independently.
Solution Approach 2:
The patent introduces a pilot valve chamber that connects the piston chamber to the first and second flow channels, adding a dimensional pathway for refrigerant flow. This allows the system to achieve large flow rates through the pilot valve mechanism rather than solely through piston displacement, thereby avoiding proportional increases in valve height.
2Productivity
If the stroke of the piston is increased to achieve large flow rate, then the flow rate is improved, but the valve opening capacity decreases
Solution Approach 1:
By separating the piston stroke function from the valve opening function, the patent allows the piston to have a longer stroke for increased flow rate while the pilot valve head maintains its travel distance for adequate valve opening capacity. The pilot valve head controls the opening action independently, ensuring that flow rate enhancement does not compromise valve opening performance.
Solution Approach 2:
The pilot valve head acts as an intermediary that controls the opening of the main valve. It receives control signals and translates them into effective valve opening actions, decoupling the piston stroke from the valve opening capacity. This intermediary mechanism ensures that the piston can have a longer stroke for flow rate improvement without directly affecting the valve opening capacity.
3Adaptability or versatility
If two one-way valves are installed in series to achieve two-way communication, then the two-way communication is realized, but the system structure becomes complicated and reliability decreases
Solution Approach 1:
The patent designs a single solenoid valve that performs both one-way and two-way communication functions. The pilot valve chamber and flow channels are configured to enable refrigerant to flow bidirectionally between the first and second connecting ports, eliminating the need for separate one-way valves while maintaining versatility.
Solution Approach 2:
The patent merges the functions of multiple valves into a single integrated structure. The pilot valve head, piston, and flow channels work together as one unified mechanism to achieve two-way communication, reducing the number of components and simplifying the overall system structure compared to using two separate one-way valves in series.
4Reliability
If guide rods are added to ensure check valve cores are directed at flow channels, then the sealing function is maintained, but the structure becomes complicated and machining difficulty increases
Solution Approach 1:
The patent removes the guide rods from the structure by redesigning the check valve arrangement. The check valve cores are positioned and oriented through the natural geometry of the flow channels and valve body structure, eliminating the need for separate guide rod components. This extraction of unnecessary elements simplifies the structure and reduces machining difficulty while maintaining the sealing function.
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 enhances flow rates without increasing valve height or power consumption, simplifies the structure, reduces machining and assembly costs, and improves control accuracy by separating the piston stroke from the pilot valve head travel, thus overcoming the limitations of conventional two-way solenoid valves.
Implementation Method 1
when the coil 70 of the two-way solenoid valve is energized, under the action of magnetic force, the movable iron core 40 drives the pilot valve head 50 to move up
Implementation Method 2
under the action of the high-pressure refrigerant, the second check valve 30f is shut off
Implementation Method 3
the refrigerant enters from the first connecting port 20a, and flows through the inflow channel 30b and the first piston flow channel 30k, and pushes open the first check valve 30e
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A linear bidirectional electromagnetic valve. A main valve body (2) of the linear bidirectional electromagnetic valve is provided with a first interface (2a) and a second interface (2b) both controlled by a piston (3) to be turned on or off. The bidirectional electromagnetic valve also has a first runner (2-1) and a second runner (2-2) both separately communicating with the first interface (2a) and the second interface (2b) to enable a refrigerant to flow out of a piston chamber (4), and the first runner (2-1) and the second runner (2-2) are both disposed in the main valve body (2). The main valve body (2) is provided inside with a guide valve runner (21d), and the piston chamber (4) communicates with a guide valve opening on a guide valve body (1) by using the guide valve runner (21d). A guide valve head (11) of the guide valve body (1) moves to open or close the guide valve opening to turn on or off the first runner (2-1), the second runner (2-2), and the piston chamber (4). The guide valve head (11) of the guide valve body (1) of the electromagnetic valve is separated from the piston (3), and when the electromagnetic valve has a great traffic demand, the stroke of a moving core does not need to be increased; dislocation is not easy to occur on the guide valve head (11) and the main valve body (2), a complicated guide element does not need to be disposed, the structure is simplified, the treatment cost and the assembly process cost are low, and the control precision can meet a requirement.