Abstract: A heat pump air conditioning system includes a compressor, a heat pump module, and an air conditioning unit, where the air conditioning unit includes an evaporator and an internal condenser, the heat pump module includes multiple air conditioning components, and a surface of the heat pump module is provided with multiple heat exchange interfaces connected to the air conditioning components, and the compressor, the evaporator, or the internal condenser is connected to the heat pump module through the heat exchange interfaces. The present application achieves the modularity of the heat pump air conditioning system, which is conducive to reducing the difficulty in installing and arranging the heat pump air conditioning system. In addition, a vehicle using the heat pump air conditioning system is also referred to.

Abstract: Provided are a gas-liquid separator and an air conditioning system of a vehicle. The gas-liquid separator includes: a housing having a liquid inlet, a liquid outlet, an air inlet and an air outlet; a middle cylinder arranged in the housing and provided with a separation recess, a first flow channel formed between an inner surface of the housing and an outer surface of the middle cylinder is configured to communicate the air inlet with the separation recess; an inner cylinder that is at least partially accommodated in the middle cylinder and forms a second flow channel together with an inner surface of the middle cylinder, the second flow channel being configured to communicate the separation recess with the air outlet; a third flow channel formed in the inner cylinder is configured to communicate the liquid inlet with the liquid outlet.

Abstract: A rotation speed control method and system, a device, and a storage medium is provided, which is applied to a heat pump system. The heat pump system includes a throttling short tube and a compressor, both sides of the throttling short tube are provided with a temperature sensor and a pressure sensor. The rotation speed control method includes: collecting actual data of the temperature sensors and the pressure sensors, processing to obtain temperature ratio data and pressure ratio data, and obtaining a corresponding oil content prediction model through matching; obtaining predicted oil content data according to the temperature ratio data and the pressure ratio data; and controlling a rotation speed of the compressor according to the predicted oil content data.