Air supply refers to the air sent by the air conditioner, that is, using the air outlet of the air conditioner box (the front section of the air conditioner box), the processed air is transported to the room where we need air conditioning through the air supply pipeline.

2. Return air

Return air refers to the air after cold and heat exchange, that is, it starts from the return air outlet, passes through the return air duct to the end of the air conditioning box, and then reaches the air temperature we need through the measures of dehumidification and heating and cooling inside the air conditioning box, and finally passes through the air supply outlet to the room, and so on. Because if the wind in the air supply duct blows all the way indoors, the pressure generated by indoor air supply will become greater and greater, so the function of returning air is set.

Step 3 exhaust

Exhaust is to put some harmful and corrosive gases indoors into the outdoor after treatment. Because these bad gases can't be returned to the air conditioning box through the return air for re-ventilation, it is necessary to exhaust these gases to the outside through the exhaust function.

4. Fresh air

Fresh air refers to fresh air, that is, indoor turbid air is discharged to the outside through fresh air pipes, forming indoor and outdoor air pressure difference, completing indoor and outdoor air exchange and purifying air. The fresh air duct is generally in the section where the return air end is perpendicular to the return air.

Because indoor air is the air we breathe, due to the dust of circulating wind, air pollution and some leaks. , you need to use outdoor fresh air to supplement.

5. Air conditioning system

Air conditioning system refers to the system that manually processes the temperature, airflow speed, humidity and cleanliness of indoor air. In some places, air with certain humidity, temperature and air quality can be obtained to meet the requirements of users and production processes and improve labor hygiene and indoor climate conditions.

Extended data

Principle of air conditioning refrigeration:

The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous state and sends it to the condenser for cooling. After cooling, it becomes a medium-temperature and high-pressure liquid refrigerant, which enters the drying bottle for filtration and dehumidification. The medium-temperature liquid refrigerant is throttled and depressurized by an expansion valve (throttling element) to become a low-temperature and low-pressure gas-liquid mixture (more liquid);

Then the evaporator absorbs the heat in the air, vaporizes it into gas, and then returns to the compressor to continue compression and refrigeration. When heating, there is a four-way valve to make the flow direction of freon in condenser and evaporator opposite to that in refrigeration, so when heating, cold air is blown outdoors and hot air is blown indoors.