Speed ​​control strategies for a condenser fan in a refrigeration system

DE602020051498T2Active Publication Date: 2025-05-21THERMO KING CORP
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Patent Information

Application Number
DE602020051498
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-03-05
Publication Date
2025-05-21
Estimated Expiration
2040-03-05

AI Technical Summary

Technical Problem

Conventional refrigeration systems operate condenser fans at fixed speeds, leading to higher power consumption than necessary, especially during lower refrigeration demand conditions, resulting in inefficiency and increased energy costs.

Method used

A variable-speed condenser fan system controlled by a controller that monitors operating parameters such as compressor speed, air temperatures, and throttling valve position to optimize fan speed based on current refrigeration demand, using predetermined models or regression analysis to maximize system efficiency.

Benefits of technology

The solution reduces power consumption and improves system efficiency by adjusting fan speed according to real-time refrigeration demand, achieving up to 7% fuel savings during pull-down operations and optimizing energy usage across varying conditions.

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Abstract

There is disclosed a refrigeration system (10) comprising a refrigeration circuit (12) that includes a compressor (14), a condenser (18), an expansion valve (22) and an evaporator (26). A condenser fan (29) of the refrigeration system (10) is configured to operate, under the control of a controller (35), at a condenser fan speed that is set based on a current refrigeration demand on the system (10).
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