Does the subject want to ask "qd 1 10h compressor is a low back pressure compressor?" ? Yes Wansheng QD 1 10H power 240w, refrigeration equipment for air conditioning, constant displacement compressor, application type: low back pressure (LBP), evaporation temperature -35℃~- 15℃. The compressor is a kind of driven fluid machinery that lifts low pressure gas into high pressure gas, and it is the heart of refrigeration system.