Improved cooling and heating device and system for vehicle, vehicle including same, and method for same

The invention relates to a cooling and heating device for a vehicle, the cooling and heating device having a refrigerant circuit including a compressor, a liquid-refrigerant-heat exchanger, at least one expansion element and an air-refrigerant- heat exchanger; and an interface configured for connecting the liquid-refrigerant-heat exchanger also to a liquid circuit, wherein the cooling and heating device has a bypass, the cooling and heating device has at least one first valve designed to open and close the bypass; a liquid-air-heat exchanger (10) is arranged in the bypass and an air conveying device for conveying air through the air-refrigerant-heat exchanger (11) is also provided for conveying air through the liquid-air-heat exchanger by means of the same air flow path. The invention also relates to a cooling and heating system and a vehicle including the same as well as a method for controlling the cooling and heating system. 本发明一种用于车辆的冷却和加热设备，其中冷却和加热设备具有：制冷剂回路，制冷剂回路包括压缩机、液体-制冷剂-热交换器、至少一个膨胀元件和空气-制冷剂-热交换器；以及