润滑科技信息平台

专利摘要

一种制冷系统及其润滑方法。制冷系统(100)包括:压缩机(110)、冷凝器(120)、蒸发器(130)和润滑回路(200),润滑回路包括从润滑回路连接的润滑后流路(230,240,260)。压缩机分别进入冷凝器和蒸发器; 以及分别从冷凝器和蒸发器连接到压缩机的预润滑流路(210,220,250); 其中,一部分润滑用制冷剂从冷凝器经润滑前流道流向压缩机润滑后,可通过润滑后流道流回蒸发器。或从蒸发器经润滑前流道流至压缩机润滑后,部分润滑制冷剂可经润滑后流道流回冷凝器。 ......

基本信息

专利类型:
发明专利
申请/专利号:
EP2017764951
申请日期:
2017-08-28
专利申请人:
分类号:
F25B31/00
发明/设计人:
STARK, MICHAEL A. ， LI, HSIHUA ， ZHANG, HAITAO ， SHU, BIAO ， DENG, KAI ， DING, HAIPING
权利要求: 1. A refrigeration system (100), comprising: a compressor (110), a condenser (120), an evaporator (130), and a lubrication circuit (200), the lubrication circuit comprising a post-lubrication flow path (230, 240) connected from the compressor (110) into the condenser (120) and the evaporator (130) respectively; and a pre-lubrication flow path (210, 220) connected from the condenser (120) and the evaporator (130) into the compressor (110) respectively; wherein the pre-lubrication flow path (210, 220) comprises a first branch (210) connected to the condenser (120) and a second branch (220) connected to the evaporator (130) respectively; and the post-lubrication flow path (230, 240) comprises a third branch (230) connected to the condenser (120) and a fourth branch (240) connected to the evaporator (130) respectively; wherein: a) the first branch (210), the second branch (220), the third branch (230) and the fourth branch (240) are provided with a first control valve (211), a second control valve (221), a third control valve (231) and a fourth control valve (241) respectively; or b) the pre-lubrication flow path (210, 220) comprises a first common flow path (250) connected to the first branch (210) and the second branch (220) respectively, and a joint of the first branch, the second branch (220), and the first common flow path (250) is provided with a first three-way valve; the post-lubrication flow path (230, 240) comprises a second common flow path (260) connected to the third branch (230) and the fourth branch (240) respectively, and a joint of the third branch, the fourth branch (240), and the second common flow path (260) is provided with a second three-way valve; and wherein after flowing from the condenser (120) via the first branch (210) to the compressor (110) for lubrication, a part of refrigerant for lubrication can flow back to the evaporator (130) via the fourth branch (240); and wherein after flowing from the evaporator via the second branch (220) to the compressor (110) for lubrication, the part of refrigerant for lubrication can flow back to the condenser (120) via the third branch (230).2. The refrigeration system of claim 1, wherein the condenser (120) comprises a liquid storage chamber (121); and the first branch (210) and the third branch (230) are connected to the liquid storage chamber (121) of the condenser (120).3. The refrigeration system of claim 1, wherein the evaporator comprises a liquid storage chamber (131); and the second branch (220) is connected to the liquid storage chamber (131) of the evaporator (130); and the fourth branch (240) is connected to the bottom of the evaporator; and/or further comprising a filter assembly arranged on the pre-lubrication flow path; and/or further comprising a liquid level switch arranged in a liquid storage chamber of the condenser.4. A lubricating method of a refrigeration system (100), wherein the refrigeration system comprises a compressor (110), a condenser (120), an evaporator (130), and a lubrication circuit (200), the lubrication circuit comprising a post-lubrication flow path (230, 240) connected from the compressor (110) into the condenser (120) and the evaporator (130) respectively; and a pre-lubrication flow path (210, 220) connected from the condenser (120) and the evaporator (130) into the compressor (110) respectively, wherein the pre-lubrication flow path (210, 220) comprises a first branch (210) connected to the condenser (120) and a second branch (220) connected to the evaporator (130) respectively; and the post-lubrication flow path (230, 240) comprises a third branch (230) connected to the condenser (120) and a fourth branch (240) connected to the evaporator (130) respectively, wherein: a) the first branch (210), the second branch (220), the third branch (230) and the fourth branch (240) are provided with a first control valve (211), a second control valve (221), a third control valve (231) and a fourth control valve (241) respectively; or b) the pre-lubrication flow path (210, 220) comprises a first common flow path (250) connected to the first branch (210) and the second branch (220) respectively, and a joint of the first branch, the second branch (220), and the first common flow path (250) is provided with a first three-way valve; the post-lubrication flow path (230, 240) comprises a second common flow path (260) connected to the third branch (230) and the fourth branch (240) respectively, and a joint of the third branch, the fourth branch (240), and the second common flow path (260) is provided with a second three-way valve; wherein the following lubrication modes are executed based on a real-time working condition, wherein in a first lubrication mode, after flowing from the condenser (120) via the first branch (210) to the compressor (110) for lubrication, a part of refrigerant for lubrication is enabled to flow back to the evaporator (130) via the fourth branch (240); and wherein in a second lubrication mode, after flowing from the evaporator (130) via the second branch (220) to the compressor (110) for lubrication, the part of refrigerant for lubrication is enabled to flow back to the condenser (120) via the third branch (230).5. The lubricating method of a refrigeration system of claim 4, wherein when the real-time working condition is a running working condition, the first lubrication mode is executed.6. The lubricating method of a refrigeration system of claim 4, wherein when the real-time working condition is any one of a power-up working condition, a standby working condition or a chiller-off working condition, the second lubrication mode is executed.7. The lubricating method of a refrigeration system of claim 6, wherein when the real-time working condition is the power-up working condition, execution of the second lubrication mode is stopped when a liquid level in a liquid storage chamber (121) of the condenser (120) is greater than a preset power-up liquid level value.8. The lubricating method of a refrigeration system of claim 7, wherein when the real-time working condition is the power-up working condition, execution of the second lubrication mode is stopped when the liquid level in the liquid storage chamber (121) of the condenser (120) is greater than the preset power-up liquid level value and execution duration of the second lubrication mode is greater than a first preset time value; optionally wherein the first preset time value is 2 minutes.9. The lubricating method of a refrigeration system of claim 6, wherein when the real-time working condition is the power-up working condition, execution of the second lubrication mode is stopped when a liquid level in a liquid storage chamber (121) of the condenser (120) is less than a preset power-up liquid level value and execution duration of the second lubrication mode is greater than a second preset time value; optionally wherein the second preset time value is 5 minutes.10. The lubricating method of a refrigeration system of claim 6, wherein when the real-time working condition is the standby working condition: the second lubrication mode is executed when a liquid level in a liquid storage chamber (121) of the condenser (120) is less than a preset standby liquid level value; and/or the second lubrication mode is executed at a first execution frequency when the liquid level in the liquid storage chamber (121) of the condenser (120) is greater than the preset standby liquid level value; and/or the second lubrication mode is kept executed with a third preset time value when the liquid level in the liquid storage chamber (121) of the condenser (120) fluctuates about the preset standby liquid level value; optionally wherein the first execution frequency is executing the second lubrication mode for 5 minutes per hour, and/or wherein the third preset time value is 5 minutes.11. The lubricating method of a refrigeration system of claim 6, wherein when the real-time working condition is the standby working condition, execution of the second lubrication mode is stopped when a liquid level in a liquid storage chamber (121) of the condenser (120) is less than a preset standby liquid level value and execution duration of the second lubrication mode is greater than a fourth preset time value; optionally wherein the fourth preset time value is 5 minutes; or wherein when the real-time working condition is the chiller-off working condition, the second lubrication mode is executed with a fifth preset time value; optionally wherein the fifth preset time value is 2 minutes; or wherein when the real-time working condition is the start-up working condition, the second lubrication mode is executed with a sixth preset time value; optionally wherein the sixth preset time value ranges from 0 to 30 seconds.