Patent ID: 9086704
Filing Date: 2015-07-21
Classification: F24F,F25B,F25D,G01K,G01N,G05B,G05D,Y10S

Abstract:
1. A method for monitoring operation of a refrigerant-cycle system, comprising: measuring a first pressure of refrigerant input to a compressor of the refrigerant-cycle system using a first pressure sensor; measuring a first temperature of the refrigerant input to the compressor using a first temperature sensor; measuring a second pressure of refrigerant output by the compressor and input to a condenser of the refrigerant-cycle system using a second pressure sensor; measuring a second temperature of refrigerant output by the condenser using a second temperature sensor; measuring a third pressure of refrigerant output by the condenser using a third pressure sensor; measuring current to the compressor using an electrical sensor; and using a processing system, determining whether the refrigerant-cycle system is at least one of undercharged or overcharged with refrigerant based on the first temperature, the first pressure, the second temperature, the second pressure, the third pressure, and the current.