Compressor hot operation device

The utility model relates to a compressor hot operation device, including compressor, condenser, expansion valve, evaporimeter, by -pass line and pressure measurement, evaporimeter, compressor, condenser and expansion valve connect gradually in order and form circulation circuit, and pressure measurement locates the junction of condenser and expansion valve, and the compressor passes through by -pass line with the junction of condenser with the junction of evaporimeter and expansion valve to be connected, the last switching device who is equipped with control by -pass line switching of by -pass line, and pressure measurement and switching device are connected, pressure measurement is used for detecting condensing pressure to according to the switch of condensing pressure control switch device, thus control by -pass line's switching. Compressor hot operation device accessible pressure measurement detects too high condensing pressure to by -pass line is opened to the control switch device, in time reduces too h