Controller and method for compressor, compressor assembly and refrigeration system
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Solution Overview
Problem
Existing refrigeration systems lack effective and timely protection mechanisms for compressors, leading to inefficient and unreliable control due to the inability to promptly respond to abnormal state parameters, such as high discharge temperatures, phase losses, or power supply issues.
Innovation Solution
A controller for compressors that monitors operation state parameters, including discharge temperature and power supply phase information, to actively control the liquid injection valve, shutting it off and powering down the compressor if thresholds are exceeded or abnormal conditions are detected, thereby preventing damage and improving control efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing liquid injection controller is used to control the flow of fluid injected to the compressor, then the discharge temperature of the compressor can be decreased, but the controller cannot trigger an effective protection action in time when a state parameter of the compressor becomes abnormal, resulting in low control efficiency and unreliable control effect
Solution Approach 1:
The controller is configured to monitor operation state parameters of the compressor and actively control the liquid injection valve to shut off when abnormal conditions are detected (such as discharge temperature exceeding a first threshold value, or phase loss/reverse state). This preliminary protective action is taken before severe damage can occur, ensuring timely response to abnormal states and improving control reliability without time loss.
2Reliability
If additional solenoid valves are added to achieve effective protection action, then the control reliability can be improved, but the system structure becomes more complex and costs increase
Solution Approach 1:
The controller is designed to perform multiple functions: it controls the liquid injection valve to regulate fluid flow for temperature management, monitors operation state parameters including discharge temperature and power supply phase information, and actively shuts off the liquid injection valve when abnormal conditions are detected. By integrating these protection and control functions into the existing controller, the patent avoids adding solenoid valves or other protective devices, thereby maintaining system simplicity while improving reliability.
Data Source
AI summary
Embodiments of the disclosure provide a controller for a compressor and a control method, a compressor assembly, and a refrigeration system, which improve control efficiency and reliability. The controller includes an obtaining module configured to obtain at least one operation state parameter of the compressor, and a controlling module configured to shut off a liquid injection valve if one of the at least one operation state parameter of the compressor meets a protection action condition, wherein the liquid injection valve is configured to regulate flow of fluid injected into the compressor.