Positive displacement enthalpy-enhancing compressor refrigerating capacity testing device

The utility model discloses a positive displacement enthalpy-enhancing compressor refrigerating capacity testing device. The device comprises a condenser, a first sub-cooler, a first liquid flowmeter and a first expansion valve which are sequentially connected, wherein an inlet of the condenser is connected with an outlet of a compressor to be tested, an outlet of the first expansion valve is communicated with a flash evaporator through a pipeline, and an air outlet of the flash evaporator is connected to the compressor to be tested. The positive displacement enthalpy-enhancing compressor refrigerating capacity testing device further comprises a second sub-cooler, a second liquid flowmeter and a calorimeter which are sequentially connected, wherein an inlet of the second sub-cooler is connected to a liquid inside the flash evaporator through a pipeline, and an outlet of the calorimeter is connected with an inlet of the compressor to be tested. The positive displacement enthalpy-enhancing compressor refrigerating capacity testing device enables a refrigerant getting into a second flowmeter to be converted into a simple liquid phase from original gas-liquid two-phase, enables calculation for the refrigerating capacity of the tested compressor to be carried out on the basis of accurate numerical values, and does not need to carry out estimation by using approximate values, thereby greatly improving the accuracy of an enthalpy-enhancing compressor refrigerating capacity test.