Structural schematic diagram of air conditioning refrigeration

The principle of air conditioner refrigeration is:

Air conditioner refrigeration is achieved by using the heat absorption of liquids when they are vaporized and the exothermic effect when they are condensed. Liquid vaporization to form steam. When the liquid (refrigerant) in a closed container, this container in addition to the liquid and the liquid itself produced by the steam, there is no other gas, liquid and steam will reach equilibrium at a certain pressure, the vapor is called saturated steam, the pressure is known as saturation pressure, the temperature is called the saturation temperature.

At equilibrium the liquid is no longer vaporized, and at this point if a portion of the vapor is withdrawn from the vessel, the liquid must necessarily continue to vaporize to produce a portion of the vapor to maintain this equilibrium.

Liquid vaporization to absorb heat, this heat is called latent heat of vaporization. Latent heat of vaporization comes from the cooled object, so that the cooled object becomes cold. In order for this process to continue, it is necessary to continuously draw vapor from the container and return it to the container after it has condensed into a liquid.

The refrigeration principle diagram is:

Expanded Information

Air Conditioner Refrigeration Principle

The compressor compresses gaseous Freon into high-temperature and high-pressure liquid Freon, and then sends it to the condenser (the outdoor unit) to dissipate the heat to become ambient temperature and high-pressure liquid Freon, so that what blows out of the outdoor unit is hot air.

Liquid Freon enters the evaporator (indoor unit) through the

capillary tube, the space suddenly increases and the pressure decreases, the liquid Freon vaporizes and becomes gaseous low-temperature Freon, which absorbs a large amount of heat, and the evaporator becomes cold, and the fan of the indoor unit blows the indoor air from the evaporator, so what is blowing out of the indoor unit is the cold air; water vapor in the air will condense into water droplets when it encounters the cold evaporator and flow out down the water pipe, which is the reason why the air conditioner will produce water.?

The gaseous Freon then returns to the compressor to continue compression and the cycle continues.

When heating there is a part called a four-way valve, which makes Freon flow in the condenser and evaporator in the opposite direction from when cooling, so when heating the outdoor air blows cold and the indoor unit blows hot.

In fact, it is the principle of using the junior high school physics learned in the liquefaction (from gas to liquid) to discharge heat and vaporization (from liquid to gas) to absorb heat.

Baidu Encyclopedia - Principle of Air Conditioning Refrigeration