| 摘要 |
PROBLEM TO BE SOLVED: To provide an air-conditioning device capable of improving durability of a sensor and accurately detecting an oil amount. SOLUTION: Oil separators 12a and 12b and compressors 11a and 11b are intercoupled through constant oil return pipes 21a and 21b. Sensors Sa and Sb to detect an oil level M in an oil separator to return oil through the constant oil return pipes are situated in the oil separators 12a and 12b. When it is detected by the sensors that an oil amount in the oil separators 12a and 12b is an oil amount lower than the oil level M, it is estimated that an oil amount in an outdoor unit is insufficient and oil from ether outdoor unit is recovered. |
