REFRIGERATION DEVICE

• Main Author: KONDOU AZUMA
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2019
• 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

Provided is a refrigeration device that enables the execution of a novel control method which can prevent refrigeration machine oil from an oil separator not being sufficiently returned and only discharged gas refrigerant being returned to a compressor side. An oil return valve (39) is provided to an oil return pipe (38) that connects an oil separator (23) disposed on a discharge side of a compressor (21) and an injection pipe (30) for supplying a refrigerant to the compressor (21). A controller (70) controls the oil return valve (39) so as to reduce the flow rate if predetermined conditions are satisfied by the discharged refrigerant temperature of the refrigerant discharged from the compressor (21) or the pressure of the refrigerant flowing through the injection pipe (30). 提供一种制冷装置，能够执行一种新颖的控制方法，该控制方法能够抑制下述情况：从油分离器向压缩机侧未充分地返回有制冷机油而仅是排出气态制冷剂返回至压缩机侧。在连接油分离器(23)与注射管(30)的回油管(38)设置有回油阀(39)，该油分离器设置于压缩机(21)的排出侧，该注射管向压缩机(21)供给制冷剂，在从压缩机(21)排出的制冷剂的排出制冷剂温度或者流动于注射管(30)的制冷剂的压力满足了规定条件的情况下，控制器(70)对回油阀(39)进行控制，以使该回油阀低流量化。