Patent ID: 7082380

Claim:
Apparatus for monitoring refrigeration equipment or the like powered by electricity supplied by a suitable source, said refrigeration equipment or the like comprising an electrically powered compressor, an evaporator, a refrigeration chamber and an electrically powered defroster; said monitoring apparatus in operation periodically sensing the values of a selected group of operating parameters of the equipment, providing output data representative of the sensed values, and performing a series of equipment performance checks or tests on the output data thereby to identify existing or incipient problems with the equipment; characterized in that the monitoring apparatus is provided with sensors and sensed parameter data value inputs obtained from the sensors associated with the selected group of operating parameters, and that the said selected operating parameters include at least the following parameters: (a) the line voltage of the source of electricity; (b) the current drawn by the compressor; (c) the condenser pressure; (d) the refrigeration chamber temperature; (e) the evaporator pressure; and (f) the defroster current.