Compressor Control Circuit Low-Speed Startup Mode
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Solution Overview
Problem
Air compressing apparatuses with inverters typically operate at maximum rotation speed during initiation, wasting energy and generating excessive noise, as they fill external air tanks of varying capacities, and existing solutions do not effectively control the transition to normal operation.
Innovation Solution
An air compressing apparatus with a compressor body, motor, inverter, control circuit, and pressure sensor that initiates operation in a low-speed activation mode and switches to a normal operating mode based on pressure and elapsed time, adjusting rotational frequency to optimize filling rates and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor operates at maximum rotation speed at initiation, then the air tank is filled quickly, but noise increases and energy is wasted
Solution Approach 1:
The control circuit preliminarily determines the tank capacity before full operation begins. Based on this preliminary determination, the motor rotation speed is optimized for the specific tank size, avoiding unnecessary high-speed operation for small tanks and ensuring adequate filling speed for large tanks. This preliminary assessment allows the system to avoid noise and energy waste while maintaining sufficient productivity.
Solution Approach 2:
The system changes the motor rotation speed parameter based on the determined tank capacity. For small-capacity tanks, the motor operates at a reduced rotation speed during initiation, directly reducing noise while still achieving adequate filling. For large-capacity tanks, the motor can operate at higher speeds when necessary. This dynamic parameter adjustment resolves the contradiction between productivity and noise.
2Productivity
If the motor operates at maximum rotation speed at initiation, then the air tank is filled quickly, but energy is wasted
Solution Approach 1:
The control circuit preliminarily determines the tank capacity before full operation begins. Based on this preliminary determination, the motor rotation speed is optimized for the specific tank size, avoiding unnecessary high-speed operation for small tanks and ensuring adequate filling speed for large tanks. This preliminary assessment allows the system to avoid energy waste while maintaining sufficient productivity.
Solution Approach 2:
The system changes the motor rotation speed parameter based on the determined tank capacity. For small-capacity tanks, the motor operates at a reduced rotation speed during initiation, directly reducing energy consumption while still achieving adequate filling. For large-capacity tanks, the motor can operate at higher speeds when necessary. This dynamic parameter adjustment resolves the contradiction between productivity and energy use.
3Productivity
If the motor operates at variable frequencies including maximum rotational frequency, then the air tank can be filled adequately, but noise increases during normal operation
Solution Approach 1:
The system dynamically adjusts the motor rotation speed based on real-time monitoring of tank pressure and filling rate. During normal operation, the control circuit monitors whether the tank is being filled at an adequate rate. If the filling rate is sufficient, the motor operates at lower variable frequencies, reducing noise. If the filling rate becomes insufficient, the motor can increase to maximum rotational frequency temporarily. This dynamic adjustment resolves the contradiction between maintaining productivity and reducing noise during normal operation.
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 configuration allows for efficient air filling while minimizing noise at startup, automatically adapting to tank capacity and ensuring sufficient filling rates without premature high-speed operation.
Implementation Method 1
a pressure sensor that detects a pressure of the air compressed by the compressor body
Data Source
AI summary
The purpose of the present invention is to provide an air compressing apparatus capable of establishing a sufficient air-filling rate while reducing noise at the initiation of operations. To solve this problem, in the present invention, the air compressing apparatus comprises a compressor body that compresses air, a motor that drives the compressor body, an inverter that controls the rotation speed of the motor, a control circuit connected to the inverter, and a pressure sensor that detects the pressure of air compressed in the compressor body, wherein the control circuit controls operation of the compressor body by operating at a low speed activation mode that operates the compressor body at a low speed rotational frequency lower than a maximum rotational speed when the air compressing apparatus is activated, and on the basis of a pressure value detected by the pressure sensor and elapsed time from activation, switching from the low speed activation mode to a normal operating mode that operates at variable frequencies including a maximum rotational frequency.