| 摘要 |
<p>PURPOSE: To save energy and control heating of a crankcase, by setting the temperature to higher temperature than a lower one between those of an indoor coil and the outside, and driving/interrupting a crankcase heater in response to conditions where compressor temperature does not reach a predetermined temperature or exceeds the predetermined temperature. CONSTITUTION: There are detected temperatures at an exhaust outlet of a compressor 12, at an inside of an evaporator 18, at an the outside of the apparatus, and at a periphery of the apparatus with sensors 112, 118, 11, and are inputted into a controller 100 of a microprocessor control device. A crankcase heater 20 is provided on the compressor 12. The controller 100 controls the crankcase heater 20 such that the temperature becomes a higher predetermined temperature range than a lower temperature of the temperatures detected by the sensors 114 and 118. When the compressor exhaust outlet temperature by the sensor 112 exceeds the lower one of the temperatures detected by the sensors 114, 118, the crankcase heater 20 is interrupted. Thus, driving energy of the crankcase heater 20 is controlled while being saved to prevent a refrigerant from moving to an oil reservoir.</p> |
