초록 ▼

Low refrigerant charge in a refrigeration system is detected by monitoring the compressor discharge pressure and temperature. This monitoring is accomplished with a combined pressure/temperature sensor located at or near the compressor outlet. The sensor output signals are fed to a controller which

Low refrigerant charge in a refrigeration system is detected by monitoring the compressor discharge pressure and temperature. This monitoring is accomplished with a combined pressure/temperature sensor located at or near the compressor outlet. The sensor output signals are fed to a controller which produces a low charge signal whenever a combination of high discharge temperature and a low discharge pressure is detected. The controller can optionally receive input of additional operating characteristics of the refrigeration system to provide a more accurate low charge signal. The controller is connected to an indicator and/or the compressor so that the low charge signal activates the indicator and/or deactivates the compressor.

대표청구항 ▼

A low refrigerant charge detecting system for a refrigeration system having a compressor, said low refrigerant charge detecting system comprising: a combined pressure and temperature sensor located near the discharge of said compressor; and a controller coupled to said combined pressure and temperat

A low refrigerant charge detecting system for a refrigeration system having a compressor, said low refrigerant charge detecting system comprising: a combined pressure and temperature sensor located near the discharge of said compressor; and a controller coupled to said combined pressure and temperature sensor wherein said controller produces a low charge signal in response to a high discharge temperature and a low discharge pressure is detected by said pressure and temperature sensor from said compressor.