Lubricant recovery system for heat exchange system and heat exchange system

A lubricant recovery system for a heat exchange system, the heat exchange system comprising a compressor, a condenser, an expansion device and an evaporator connected in sequence to form a loop, and further comprising a reservoir for storing lubricant and in communication with the compressor, and the lubricant recovery system comprising:

• a first flow path disposed between a suction chamber of the compressor and the reservoir, and having a first pump and a first filter, wherein the first pump pumps a part of the lubricant in the suction chamber to the reservoir, and the first filter is disposed upstream of the first pump for filtering the lubricant, wherein the first pump is an electromagnetic pump;
• and
• a second flow path disposed between the evaporator and the suction chamber, and having a second pump and a second filter, wherein the second pump pumps a mixture of the lubricant and a refrigerant from the evaporator to the suction chamber, and the second filter is disposed upstream of the second pump for filtering the mixture, wherein the second pump is one of an electromagnetic pump or a gas-liquid two-phase pump.