REFRIGERATION CYCLE APPARATUS

• Main Author: UENO, KIYOTAKA
• Format: Patent
• Language: English; French; German
• Published: 14.12.2005
• Edition: 7
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; WEAPONS

A refrigerating cycle apparatus equipped with, for each of a plurality of outdoor units, a plurality of high pressure type compressors having a casing held with an oil, and having a high pressure side tube to which a discharge tube of the compressor is connected and a low pressure side tube to which a suction tube of the compressor is connected, comprising: a first oil balancing tube for each outdoor unit, configured to allow a flowing-in of an excess portion of the oil held in the casing of the respective compressor; a first pressure reducing device configured to be mounted on the first oil balancing tube; an oil tank, for each outdoor unit, configured to allow a flowing-in of the oil in the respective first oil balancing tube; a second oil balancing tube, for each outdoor unit, configured to connect the oil tank and the suction tube; a second pressure reducing device configured to be mounted on the respective second oil balancing tube; a bypass tube for each outdoor unit, configured to be connected between the high pressure side tube and the oil tank; a third pressure reducing device configured to be mounted on the bypass tube a first opening/closing valve configured to be connected in parallel with the third pressure reducing device; a third oil balancing tube, for each outdoor unit, configured to be connected between the oil tank and the low pressure side tube; second and third opening/closing valves configured to be provided at the respective third oil balancing tube; and a balancing tube configured to be connected between mutual connections at a position between the second and third opening valves of the third oil balancing tube.