Refrigeration apparatus

Abstract

In the case where one compressor that is operated by being connected in parallel is a compressor in which the discharged oil amount is small, and the other compressor is a compressor in which the discharged oil amount is large, the amounts of refrigerator oil in the compressors are made approximately equal. In the refrigeration apparatus in which an outdoor unit 100 includes at least two compressors, a first compressor 110 and a second compressor 120 , which are connected in parallel with each other; an oil separator 111, 121 is provided in a discharge pipe of each of the compressors 110 and 120 ; and a first oil separator 111 on the first compressor side is connected to a suction pipe 164 of the second compressor 120 via first oil return piping 114 , and a second oil separator 121 on the second compressor side is connected to a suction pipe 163 of the first compressor 110 via second oil return piping 124 , a rotary compressor is used as the first compressor 110 , and a scroll compressor is used as the second compressor 120 ; and an oil storage part 110 b of the first compressor 110 is connected to the suction pipe 164 of the second compressor 120 via an oil guiding pipe 118.

1 . A refrigeration apparatus in which an outdoor unit includes at least two compressors, a first compressor and a second compressor, which are connected in parallel with each other; an oil separator is provided in a discharge pipe of each of the compressors; and a first oil separator on the first compressor side is connected to a suction pipe of the second compressor via first oil return piping, and a second oil separator on the second compressor side is connected to a suction pipe of the first compressor via second oil return piping, wherein
 the amount of discharged oil differs between the first compressor and the second compressor; and an oil storage part of the first compressor in which the amount of discharged oil is small is connected to the suction pipe of the second compressor in which the amount of discharged oil is large.   
   
   
       2 . The refrigeration apparatus according to  claim 1 , wherein the first compressor is a rotary compressor, and the second compressor is a scroll compressor. 
   
   
       3 . The refrigeration apparatus according to  claim 1 , wherein the suction pipe of the first compressor and the suction pipe of the second compressor communicate with each other; and the connecting position of the first oil return piping and the oil guiding pipe to the suction pipe of the second compressor is a position at which the refrigerator oil supplied from the first oil return piping and the oil guiding pipe to the second compressor side drops on account of the gravity and is sucked into the first compressor when the second compressor is in a non-operating state.