Compressor Solenoid Valve Inlet Placement
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Solution Overview
Problem
Existing compressors face reliability issues due to refrigerant flow into the compression chamber when powered off, and inefficiencies in shutting off the injection pipeline, leading to reduced performance and increased dead volume.
Innovation Solution
A compressor with a solenoid valve installed adjacent to the compression chamber inlet, connected to both the power source and a system controller, allowing for precise control of refrigerant flow through the injection pipeline, ensuring it is turned off during power-off and adjusted based on operational needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an electronic expansion valve is used to shut off the injection pipeline, then the compressor performance is improved, but the reliability deteriorates when the system is suddenly powered off
Solution Approach 1:
The invention extracts the solenoid valve from the external control system and integrates it directly into the compressor body, positioning it at the inlet of the compression chamber. This ensures the valve remains under direct compressor control and shuts off automatically when power is lost, eliminating the reliability issue of external electronic expansion valves failing to close during sudden power-offs
Solution Approach 2:
The solenoid valve acts as an intermediary component between the power source and the refrigerant flow. It provides a reliable on/off control mechanism that responds directly to power availability, ensuring the injection pipeline is shut off when power is lost while remaining controllable during normal operation
2Adaptability or versatility
If the injection pipeline is shut off by an external electronic expansion valve, then the compressor can be used for refrigeration purposes, but the dead volume in the injection pipeline increases
Solution Approach 1:
The invention applies local quality by positioning the solenoid valve at a specific location - the inlet of the compression chamber - rather than using an external electronic expansion valve. This localized placement minimizes the length of the injection pipeline and reduces the dead volume where refrigerant can remain trapped, while still providing the necessary shut-off capability for refrigeration operation
Solution Approach 2:
Instead of using an external valve to control the injection pipeline, the invention inverts the approach by integrating the valve directly into the compressor body at the compression chamber inlet. This reversal of the control location eliminates unnecessary pipeline length and reduces dead volume while maintaining the ability to shut off refrigerant flow when needed
3Reliability
If the electronic expansion valve is arranged outside the compressor, then the injection pipeline can be shut off, but the structure complexity increases
Solution Approach 1:
The invention merges the solenoid valve with the compressor body, integrating what was previously a separate external component into the compressor itself. This combination simplifies the overall system structure by eliminating external valves and their associated mounting hardware, while maintaining the essential function of shutting off the injection pipeline
Solution Approach 2:
The integrated solenoid valve serves multiple functions: it controls refrigerant injection during cooling operation, shuts off the injection pipeline during refrigeration operation, and provides automatic shut-off during power failures. This multi-functionality eliminates the need for separate external control mechanisms, reducing system complexity while maintaining comprehensive control capability
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 ensures complete shut-off of the refrigerant flow during power-off, reduces dead volume, and enhances compressor reliability and performance by simplifying the control system and minimizing refrigerant residual.
Implementation Method 1
a solenoid valve installed on the injection pipeline in the housing and configured to allow or block off the injection of the fluid through the injection pipeline
Data Source
AI summary
A compressor includes a housing, in which a compression chamber is provided; an injection pipeline installed in the housing and configured to inject a fluid into the compression chamber; and a solenoid valve installed on the injection pipeline in the housing and configured to allow or block off the injection of the fluid through the injection pipeline.