Air Compressor Control with Atmospheric-Pressure Compensation
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Solution Overview
Problem
Air compressors installed in highlands or under bad weather conditions experience a decrease in atmospheric pressure, leading to an increased ratio between suction and delivery pressures, causing overcompression and a rise in delivery temperature, which can reduce the lifespan of parts.
Innovation Solution
The air compressor includes a controller that adjusts the set pressure based on atmospheric pressure input, correcting the control, upper, and lower limit pressures using equations to maintain a set ratio with atmospheric pressure, thereby preventing overcompression and temperature rise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the set pressure is kept unchanged when atmospheric pressure decreases, then the control system remains simple, but the delivery temperature rises due to overcompression
Solution Approach 1:
The set pressure is made dynamically adjustable based on atmospheric pressure conditions. The controller automatically modifies the set pressure according to the detected atmospheric pressure, transitioning from a static fixed pressure control to a dynamic adaptive control system that responds to environmental changes.
Solution Approach 2:
An atmospheric pressure detection device provides feedback to the controller, which then adjusts the set pressure accordingly. This feedback loop enables the system to automatically compensate for atmospheric pressure changes, preventing overcompression and excessive temperature rise while maintaining optimal compression ratios.
2Stress or pressure
If the set pressure is increased to compensate for low atmospheric pressure, then the delivery pressure is maintained, but the compression ratio becomes excessive causing temperature rise
Solution Approach 1:
The system changes the set pressure parameter dynamically based on atmospheric pressure conditions. Instead of using a fixed set pressure, the controller adjusts this parameter in real-time according to atmospheric pressure readings, optimizing the compression process to maintain appropriate compression ratios and prevent excessive temperature rise.
3Reliability
If the atmospheric pressure detection device is added, then the delivery temperature can be controlled, but the device complexity increases
Solution Approach 1:
The controller automatically adjusts the set pressure based on atmospheric pressure detection without requiring manual intervention. The system serves itself by detecting environmental conditions and autonomously optimizing compression parameters, eliminating the need for complex manual adjustment mechanisms while extending parts lifespan through temperature control.
Data Source
AI summary
Provided is an air compressor that suppresses a rise in delivery temperature due to a change in atmospheric pressure, and consequently improves the life of parts. The air compressor 1 includes a motor 2, a compressor main body 3 driven by the motor 2 to compress air, a delivery pressure sensor 12 that senses a delivery pressure of the compressor main body 3, an atmospheric pressure sensor 13 that senses an atmospheric pressure, and a controller 15. The controller 15 compares the delivery pressure sensed by the delivery pressure sensor 12 with a set pressure, and performs operation control based on a result of the comparison. The controller 15 corrects the set pressure such that a ratio between the atmospheric pressure sensed by the atmospheric pressure sensor 13 and the set pressure becomes a set value set in advance.