SYSTEM AND METHOD FOR CONTROLLING AIR CONDITIONING SYSTEM

摘要

An air conditioning system for an operator cab of machine includes a condenser, an evaporator, a compressor and a controller operable to control an operation of the compressor. The controller maintains a pre-defined compressor run time when the compressor is in an ON state. The controller is configured to determine a temperature of the evaporator and compare it with at least one of a first lower threshold temperature value and a second lower threshold temperature value being less than the first lower threshold temperature value. The controller outputs a compressor control command signal to change the operational state of the compressor to an OFF state when the determined temperature of the evaporator is less than at least one of the first lower threshold temperature value for a first time period, and the second lower threshold temperature value for a second time period being less than the first time period.

主权项

1. An air conditioning system for use within an operator cab of a machine, comprising:
a condenser; an evaporator; a compressor, and a controller operable to control an operation of the compressor, the controller is configured to:
determine an operational state of the compressor;selectively maintain a pre-defined compressor run time when the compressor in an ON state;determine a temperature of the evaporator;compare the determined temperature of the evaporator with at least one of a first lower threshold temperature value and a second lower threshold temperature value being less than the first lower threshold temperature value; andoutput a compressor control command signal to change the operational state of the compressor to an OFF state when the determined temperature of the evaporator is less than at least one of the first lower threshold temperature value for a first time period, and the second lower threshold temperature value for a second time period being less than the first time period.