System and method for multi-stage operation of a compressor

By introducing a compressor control method with three operating modes into the HVAC system, combined with motor speed control and solenoid valve switching, the problems of low efficiency of two-stage compressors and high cost of variable capacity compressors are solved, achieving more efficient and lower-cost compressor operation.

CN116324169BActive Publication Date: 2026-06-12COPELAND LLP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
COPELAND LLP
Filing Date
2021-08-06
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

In existing HVAC systems, two-stage compressors are inefficient, while variable capacity compressors are expensive, making it difficult to find a balance between cost and efficiency.

⚗Method used

The control module controls the compressor's on/off state and solenoid valves to achieve three operating modes: high capacity, low capacity, and medium capacity. Combined with motor speed control and solenoid valve switching, the compressor's operation is optimized.

🎯Benefits of technology

It enables more efficient compressor operation under different load and environmental conditions, improving system efficiency and reducing operating costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

A system for controlling a capacity of a compressor includes a motor of the compressor in which a main winding is connected to an auxiliary winding at a connection point, and a driver configured to control a speed of the motor. The system includes a first switch configured to selectively connect the main winding to a first line voltage or a first output of the driver, a second switch configured to selectively connect the connection point to a second line voltage or a second output of the driver, and a third switch configured to selectively connect the auxiliary winding to a capacitor or a third output of the driver. The system includes a solenoid valve configured to selectively operate at a first capacity or a second capacity. The system includes a control module configured to control the driver, the first switch, the second switch, and the third switch.
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