| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerant flow controller, capable of improving cooling efficiency while preventing breakage of a compressor. SOLUTION: The refrigerant flow controller comprises: an electronic expansion valve 13 for adjusting the quantity of refrigerant flowing to an evaporator 12 according to the opening; one refrigerant temperature sensor 21 and the other refrigerant temperature sensor 20 for detecting the temperature of refrigerant, which are set between an inlet part of refrigerant and an outlet part thereof in the evaporator while differing the distances from the inlet part, respectively; and a valve opening adjusting means 30 for adjusting the opening of the electronic expansion valve according to detection results of the temperature sensors. The other temperature sensor is located closer to the inlet part than the other temperature sensor. The valve opening adjusting means reduces the opening of the electronic expansion valve, when a temperature difference obtained by subtracting a second temperature detected by the one temperature sensor from a first temperature detected by the other temperature sensor is a preset set temperature difference or less, so that the temperature difference becomes a target temperature difference larger than the set temperature difference. COPYRIGHT: (C)2008,JPO&INPIT
|
