Engine waste heat direct utilization and gas supply adjustable type gas heat pump unit

The invention discloses an engine waste heat direct utilization and air supply adjustable type gas heat pump unit, and relates to a gas heat pump unit. The condenser is provided with a refrigerant heat exchange pipeline and a cooling liquid heat exchange pipeline which are matched with the water supply and return pipeline, a refrigerant passes through the refrigerant heat exchange pipeline from the outlet end of the quasi-secondary compressor and then is divided into a main path and an auxiliary path, and the auxiliary path passes through a first electronic expansion valve and a flue gas heat exchanger and then is connected with an air supply opening of the quasi-secondary compressor; the main path can control forward and reverse circulation of the second electronic expansion valve and the outdoor evaporator through switching of the four-way reversing valve, the outlet end of the main path is connected with the inlet end of the quasi-secondary compressor, cooling liquid flows back to the inlet end from the ou