| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent reduction in manufacturability caused by an increase in the number of detection means and complicated structure and electric circuit, and cost increase caused by an increase in the number of parts. <P>SOLUTION: In a heat source unit A selectively using a plurality of working refrigerants, the heat source unit A includes a plurality of compressors 1, 2, 3, discharge pipes 1B, 2B, 3B connected to the compressors 1, 2, 3 for discharging the high-pressure working refrigerant, and a discharged refrigerant gathering part to which each of the discharge pipes 1B, 2B, 3B is connected. The heat source unit A further includes a plurality of first detection means 7a, 7b, 7c detecting that pressure in each of the discharge pipes exceeds an allowable upper limit pressure, a second detection means 10 detecting that pressure in a gathering pipe exceeds an allowable upper limit pressure, and a control means controlling operation of the compressors by the detection signal detected by the first or second detection means. <P>COPYRIGHT: (C)2012,JPO&INPIT |
