公开(公告)号：US20180106520A1

公开(公告)日：2018-04-19

申请号：US15783517

申请日：2017-10-13

Applicant: Emerson Climate Technologies, Inc.

Inventor： Frank S. WALLIS ,  Randall KNICK ,  Diane Belinda PATRIZIO ,  Richard Allen MIU

IPC: F25B49/02 ,  F04B49/02 ,  F04B49/10 ,  F04B49/20

CPC classification number: F25B49/022 ,  F04B49/02 ,  F04B49/10 ,  F04B49/20 ,  F04B2201/0402 ,  F04B2201/0804 ,  F04B2205/01 ,  F25B5/02 ,  F25B41/043 ,  F25B49/005 ,  F25B49/02 ,  F25B2400/075 ,  F25B2500/08 ,  F25B2500/26 ,  F25B2500/28 ,  F25B2600/0261 ,  F25B2600/2513 ,  F25B2600/2515 ,  F25B2700/15 ,  F25B2700/1931 ,  F25B2700/1933 ,  F25B2700/21151 ,  F25B2700/21152 ,  F25B2700/21161 ,  F25B2700/21163 ,  F25B2700/21171

Abstract: A system includes a sensor and a controller for a refrigeration or HVAC system having a compressor. The sensor senses a temperature of the compressor during operation of the compressor. The controller is configured to determine a rate of change of the temperature relative to time and to perform one or more procedures to protect the compressor based on the rate of change of the temperature. The one or more procedures to protect the compressor include shutting down the compressor, throttling a pressure regulator valve of an evaporator associated with the compressor, adjusting an expansion valve associated with the evaporator, reducing speed of the compressor, and partially or wholly unloading the compressor.