How to make heat with a wall-mounted air conditioner?

You need to click on the "mode" button, and then adjust the cooling - dehumidification - air supply - heating and other steps.

In the remote control, we can see that the snowflake-shaped icon represents the cooling, raindrop shape represents the dehumidification, fan-shaped icon represents the air, the shape of the sun represents the heating.

Heating principle:

When the air conditioner is heating, the gas Freon is pressurized by the compressor to become a high-temperature and high-pressure gas, which enters the heat exchanger of the indoor unit (the condenser at this time), and then condenses, liquefies and excretes heat to become a liquid, and at the same time heats up the indoor air to raise the indoor temperature.

Liquid Freon is depressurized by the throttling device and enters the heat exchanger of the outdoor unit (at this time, it is the evaporator), evaporates and absorbs heat to become a gas, and at the same time, absorbs the heat of the outdoor air (the outdoor air becomes colder). Freon becomes a gas and enters the compressor again to start the next cycle.

The first air conditioners and refrigerators used toxic gases like ammonia and chloromethane. Leaks of these gases could cause major accidents. Thomas Miceli invented chlorofluorocarbon gas (chlorofluorocarbon gas) in 1928 and named it Freon. This refrigerant is much safer for humans, but is harmful to the ozone layer.