Compressor control in a vapor compression cooling cycle
A motor controller in vapor compression systems adjusts compressor speed based on expansion valve position and mass flow estimation to address control sensitivity issues, enhancing system efficiency and preventing surge.
US20260139885A1Pending Publication Date: 2026-05-21GARRETT TRANSPORTATION I INC
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Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- GARRETT TRANSPORTATION I INC
- Filing Date
- 2026-01-15
- Publication Date
- 2026-05-21
AI Technical Summary
Technical Problem
Existing vapor compression cooling systems face challenges in precise control of compressor speed due to independent expansion valve control and variations in evaporator wall temperature, leading to impaired control capability.
Method used
Implementing a motor controller that receives expansion valve position signals, analyzes position deltas, and adjusts compressor speed to prevent surge, using sensors and observers to estimate mass flow and account for system limitations.
Benefits of technology
Enhances compressor control sensitivity and prevents surge conditions, improving system efficiency and stability.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure US20260139885A1-D00000_ABST
Abstract
Controllers, system and methods for vapor cycle compressor speed management. A system having a compressor, a condenser, an expansion valve and an evaporator with a circulating refrigerant or refrigerant is managed. A compressor controller uses expansion valve position, a mass flow estimate, or a mass flow measurement to determine desired compressor speed.
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