Capacity Control Valve Using Discharge Pressure for Faster Adjustment
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Solution Overview
Problem
The capacity control valve in existing systems takes time to adjust the control pressure of the air conditioning system to a target value due to the limited influence of low suction pressure on the valve element.
Innovation Solution
A capacity control valve design that includes a pressure receiving portion to apply force from the high discharge pressure in the axial direction of the valve element, allowing for easier adjustment of the valve opening degree and faster control pressure adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If suction pressure is used to adjust the valve opening degree, then the valve can be controlled, but the adjustment speed is slow because suction pressure is low and exerts little influence on the valve element
Solution Approach 1:
The patent introduces a pressure receiving portion as an intermediary mechanism that receives discharge pressure and transmits it to the valve element. This mediator amplifies the control force by using the high-pressure discharge fluid to act on the valve element, overcoming the weakness of using low-pressure suction fluid directly.
Solution Approach 2:
The patent changes the pressure parameter applied to the valve element from low suction pressure to high discharge pressure. By receiving discharge pressure in the pressure receiving portion and transmitting it to the valve element, the system achieves faster and more effective valve opening degree adjustment.
2Productivity
If discharge pressure is applied to the valve element, then the valve opening degree can be adjusted more easily and quickly, but the system complexity increases
Solution Approach 1:
The pressure receiving portion serves multiple functions: it receives discharge pressure, transmits it to the valve element for control, and integrates with the existing valve structure. This multi-functionality reduces the need for separate components, thereby limiting the increase in system complexity.
Solution Approach 2:
The patent merges the pressure receiving function with the existing valve element structure. The pressure receiving portion is integrated into the valve body or valve element, combining the functions of pressure reception and valve actuation into a unified structure, thus minimizing additional complexity.
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 solution enables quicker attainment of the target control pressure in the air conditioning system by effectively utilizing high discharge pressure for correcting the actions of the valve element, thus enhancing the responsiveness and precision of the capacity control valve.
Implementation Method 1
a valve element to be driven by a solenoid
Implementation Method 2
a spring that biases the valve element in a direction opposite to a driving direction by the solenoid
Implementation Method 3
a pressure receiving portion to which force in accordance with discharge pressure is applied in an axial direction of the valve element
Data Source
Figure 1
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Figure 3
AI summary
A capacity control valve in which a valve opening degree can be favorably adjusted is provided. A capacity control valve includes a valve housing (10) provided with a suction port (11) through which a suction fluid of suction pressure (Ps) passes, and a control port (12) through which a control fluid of control pressure (Pc) passes, a valve element (51) configured to be driven by a solenoid (80), a spring (85) that biases the valve element (51) in the direction opposite to the driving direction by the solenoid (80), and a CS valve (50) formed by a CS valve seat (10a) and the valve element (51) and configured for opening and closing a communication between the control port (12) and the suction port (11) by movement of the valve element (51). The control pressure (Pc) is controlled by opening and closing the CS valve (50), and the capacity control valve further includes a pressure receiving portion (51d) to which force in accordance with discharge pressure (Pd) is applied in the axial direction of the valve element (51) .