Lubricant management for HVACR systems

Systems and methods for lubricant management of a compressor in an HVACR system are disclosed. A heat transfer circuit providing heating or cooling with a working fluid includes a compressor for compressing the working fluid and a heat source configured to increase a suction temperature of the working fluid entering the compressor. One or more lubricant rheological properties in the compressor system based on measurements at or near the compressor bearing cavity are determinable. The lubricant reservoir may be in thermal communication with the discharge flow path of the compressor. An internal heat exchanger may be disposed within the compressor for increasing the viscosity of lubricant to be circulated back into the compressor. The heater may be located on the fluid line between the lubricant separator and the lubricant inlet. The condenser fan can be controlled. 公开了用于HVACR系统中压缩机的润滑剂管理的系统和方法。利用工作流体来提供加热或冷却的传热回路包括用于压缩工作流体的压缩机和被配置成增加进入压缩机的工作流体的吸入温度的热源。基于在压缩机轴承腔处或附近进行测量的压缩机系统中的一个或多个润滑剂流变性质是可确定的。润滑剂贮存器可以与压缩机的排放流