| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a refrigerating air conditioning device which can detect the leakage of a refrigerant by calculating a surplus liquid refrigerant amount in a surplus liquid refrigerant storage vessel by using a detecting device which is high in a degree of an installation freedom and low in cost. <P>SOLUTION: The refrigerating air conditioning device includes a liquid-face detection sensor 25 which includes temperature sensors 26a to 26e arranged on the external surface of an ACC 24 and measure temperatures of the external surface, which specifies the temperature sensor corresponding to the liquid-face position of a surplus liquid refrigerant stored in the ACC 24 among the temperature sensors 26a to 26e on the basis of temperature-measured values of the sensors, and which outputs the identification information of the specified temperature sensor. A correlation between the surplus liquid refrigerant amount in the ACC 24 and an output of the liquid-face detection sensor 25 at the surplus liquid refrigerant amount is acquired in advance by actual measurement by operating a refrigerant circuit. Then, the existence of the refrigerant leakage is determined by adding a refrigerant amount except for the surplus liquid refrigerant amount in the ACC 24 calculated by a refrigerant amount calculation part 3b to the present surplus liquid refrigerant amount which is obtained from a correlation with the output of the liquid-face detection sensor 25, and by calculating the total refrigerant amount in the refrigerant circuit. <P>COPYRIGHT: (C)2013,JPO&INPIT |
