空調器工作時，制冷系統內的低壓、低溫制冷劑蒸氣被壓縮機吸入并壓縮為高壓、高溫的過熱蒸氣后排至冷凝器；同時室外側風扇吸入的室外空氣流經冷凝器，帶走制冷劑放出的熱量，使高壓、高溫的制冷劑蒸氣結為高壓液體。高壓液體經過節流毛細管降壓降溫流入蒸發器，并在相應的壓力下蒸發，吸取周圍熱量，同時室內側風扇使室內空氣不斷進入蒸發器的翅片間進行熱交換，并將放熱后變冷的氣體送向室內。如此室內外空氣不斷循環流動，達到降低溫度的目的。
When the air conditioner is working, the low-pressure and low-temperature refrigerant vapor in the refrigeration system is sucked in by the compressor and compressed into high-pressure and high-temperature superheated vapor, which is then discharged to the condenser; At the same time, the outdoor air sucked in by the outdoor side fan flows through the condenser, taking away the heat released by the refrigerant, causing the high-pressure and high-temperature refrigerant vapor to form a high-pressure liquid. High pressure liquid flows into the evaporator through a throttling capillary to reduce pressure and cool down, and evaporates at the corresponding pressure, absorbing surrounding heat. At the same time, the indoor side fan continuously enters the fins of the evaporator for heat exchange, and sends the cooled gas that has been released to the indoor environment. In this way, the indoor and outdoor air continuously circulates and flows, achieving the goal of reducing temperature.
熱泵制熱是利用制冷系統的壓縮機冷凝熱來加熱室內空氣的，空調器在制冷工作時，低壓、低溫制冷劑液體在蒸發器內蒸發吸熱，而高溫、高壓制冷劑氣體在冷凝器內放熱冷凝。熱泵制熱是通過電磁四通換向閥來改變制冷劑的循環方向的，原來制冷工作時作為蒸發器的室內盤管，變成制熱時的冷凝器，實現制熱的。
Heat pump heating uses the condensation heat of the compressor in the refrigeration system to heat indoor air. During the refrigeration operation of the air conditioner, low-pressure and low-temperature refrigerant liquids evaporate and absorb heat in the evaporator, while high-temperature and high-pressure refrigerant gases release heat and condense in the condenser. Heat pump heating is achieved by changing the direction of refrigerant circulation through an electromagnetic four-way directional valve. Originally used as an indoor coil in the evaporator during refrigeration, it has been transformed into a condenser during heating, achieving heating.
由于熱泵空調器是通過吸收室外熱量來制熱的，所以熱泵制熱能力隨室外溫度的變化而變化，一般室外氣溫為0℃時，其制熱量為名義制熱量的80%。室外氣溫為-5℃時，其制熱量為名義制熱量的70%
Due to the fact that heat pump air conditioners generate heat by absorbing outdoor heat, the heating capacity of heat pumps varies with changes in outdoor temperature. Generally, when the outdoor temperature is 0 ℃, its heating capacity is 80% of the nominal heating capacity. When the outdoor temperature is -5 ℃, its heating capacity is 70% of the nominal heating capacity