Air cylinder assembly, compressor and heat pump air conditioner

The invention provides an air cylinder assembly, a compressor and a heat pump air conditioner, and the air cylinder assembly comprises a cylinder body, the roller is rotatably arranged in the working cavity, and the working cavity is divided into a low-pressure cavity and a high-pressure cavity by the roller; the air inlet channel communicated with the low-pressure cavity is arranged on the side wall of the cylinder body in a penetrating manner; and the air supplementing channel is arranged on the side wall of the cylinder body in a penetrating mode, the air supplementing channel comprises an air supplementing inlet and an air supplementing outlet, the air supplementing inlet communicates with the air inlet channel, and the air supplementing outlet communicates with the high-pressure cavity, so that the air supplementing inlet and the air supplementing outlet are opened or closed when the roller rotates. According to the air cylinder assembly, the technical problem that the heating capacity of a heat pump air