Domestic sewage extracting device in sewage heat pump heat supply refrigeration air-condition system

The utility model relates to a domestic sewage extracting device in a sewage heat pump heat-supplying and refrigerating air-conditioner system, which takes domestic sewage as the cold and heat sources, and is composed of an electric motor 1, a speed reducer 2, a gear wheel 3, a gear ring 4, a barrel shaft 5, a slide bearing 6, a sieve body 7, a rotary wire screen 8, a sealed slide bearing 9 and a sewage pump 10, wherein the electric motor is connected with the speed reducer 2, the gear wheel 3 at the output shaft end of the speed reducer 2 is engaged with the gear ring 4, the slide bearing 6 is arranged on the barrel shaft 5, the rotary wire screen 8 is arranged outside of the sieve body 7 which is connected to the rotary wire screen 8 through the sealed slide bearing 9 and the sewage pump 10 is arranged in the sieve body 7. The utility model solves the problem of adopting the domestic sewage, which is a new energy source, as the cold and heat sources and has the advantage of low energy consumption. Under proper heat source conditions, the domestic sewage extracting device can save energy 40% more than an air-source heat pump system and 70% more than electric heating. Additionally, the utility model has the advantages of no carbon dioxide and smoke discharge, no environmental pollution, stable operating conditions, convenient maintenance and low cost.