Composite Valve Interlocking Mechanism for Locked State Release
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Solution Overview
Problem
In composite valves where the main valve and sub-valve are driven by a single solenoid, foreign materials can enter the sliding portion and cause the main valve to lock, making it difficult to start the compressor, as the spring biasing force alone may not be sufficient to operate the main valve element in the closing direction.
Innovation Solution
An interlocking mechanism that uses an actuating rod to transmit solenoidal force to both the main and sub-valve elements, allowing the sub-valve to be opened reliably and increasing the pressing load to release the locked state of the main valve by displacing the actuating rod relative to the main valve element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the main valve element is slidably supported by the body to enable smooth operation, then the ease of operation is improved, but foreign materials can enter the sliding portion and cause the main valve to lock, reducing reliability
Solution Approach 1:
The valve system is divided into two separate valve elements (main valve element and sub-valve element) that can operate independently. When the main valve element becomes locked due to foreign materials, the sub-valve element can still be operated to release the locking by allowing refrigerant flow that removes the foreign materials from the sliding portion.
Solution Approach 2:
The sub-valve element acts as an intermediary mechanism to resolve the locking problem of the main valve element. By operating the sub-valve, refrigerant flow is established that serves as a mediator to flush out foreign materials and release the locked main valve element.
2Ease of manufacture
If the spring biasing force is used to operate the main valve element in the closing direction, then the ease of manufacture is improved, but the force may not be sufficient to release the locked state when foreign materials are present
Solution Approach 1:
The sub-valve is operated first as a preliminary action to establish refrigerant flow through the system. This flow serves to flush out foreign materials from the main valve sliding portion before the main valve operation is attempted, creating favorable conditions for successful valve operation.
Solution Approach 2:
The system dynamically adjusts the operating sequence based on the locked state condition. When locking is detected, the control method dynamically switches to operating the sub-valve first to release the lock, then operating the main valve. The force application is dynamically adjusted through the interlocking mechanism based on real-time operational needs.
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
Enables reliable release of the locked state and proper operation of the sub-valve by the solenoidal force, ensuring the compressor can be started even when foreign materials are present, by increasing the pressing load on the main valve element.
Implementation Method 1
a solenoid configured to generate a solenoidal force in accordance with an amount of current supplied
Data Source
AI summary
A control valve according to an exemplary embodiment includes an interlocking mechanism that achieves a first operation and a second operation simultaneously or continuously. In the first operation, a sub-valve is opened by having an actuating rod displaced integrally with a sub-valve element in accordance with the magnitude of solenoidal force. In the second operation, a load, by which to bias a main valve element in a closing direction of a main valve, is increased by displacing the actuating rod relative to the main valve element.