Why Is The Outlet Air Of FFU Purification Fan in Air Conditioning Hot

Many families now have air conditioners installed. FFU purification fans will be installed in the air conditioner. However, people sometimes feel that the wind blown by the FFU purification fan in the air conditioner is hot. Some people may have some doubts about this phenomenon. Is the FFU purification fan in the air conditioner hot? Why is the FFU purification fan wind hot? Let's take a closer look.
The air blown by the fan of the air conditioner is hot, which exchanges the hot air from the room.
Working principle of air conditioning: When the power is turned on, the compressor starts to operate. The compressor absorbs low-temperature and low-pressure refrigerant from the evaporator. The low-temperature and low-pressure refrigerant is then compressed into a high-temperature and high-pressure refrigerant gas and enters the condenser. This high-temperature and high-pressure refrigerant gas is condensed into a liquid refrigerant. During the condensation process, heat is released outdoors through the condenser. Medium temperature and high pressure liquid refrigerant enters the capillary tube and is reduced in pressure and temperature. The low-pressure fluid refrigerant passing through the capillary tube is sent to the evaporator for evaporation. During this process, the heat in the room is absorbed. Repeat this cycle until the indoor temperature decreases to the set temperature.
From the working principle of air conditioning, it can be seen that air conditioning is a household appliance that can exchange indoor and outdoor heat. Therefore, the air emitted by indoor units and outdoor units is exactly the opposite - during refrigeration, the indoor units blow out cold air, while the outdoor units blow out hot air; When heating, the opposite is true.
The air conditioner is hung outdoors by a host machine, mainly including a compressor, a heat sink, and a fan. When the compressor compresses the refrigerant from a gaseous state to a liquid state, it releases heat, which is dissipated by the heat sink and the fan. Therefore, the wind blown by the fan is hot. After heat dissipation, the refrigerant enters the room through a copper pipe, which increases the diameter of the copper pipe, and reduces the pressure. The liquid refrigerant changes from a liquid state to a gaseous state, absorbing heat to the surrounding environment, generating cold air
The cold air blown out is the result of indoor air contacting the condenser (copper tube) and heat being absorbed. This is refrigeration
During the refrigeration process, the water vapor in the indoor air contacts the condenser (copper tube) and becomes water, which is discharged by the drain pipe, resulting in less and less water in the air
The changes in fan speed are related to changes in current, air volume, and pressure, but not to efficiency.
When the fan speed increases, the air volume increases by a power factor of one;
When the fan speed increases, the wind pressure increases by a square factor;
When the fan speed increases, the current increases by a third power factor;
The efficiency value remains unchanged as the fan speed increases.
For example, if the original rotational speed is 1000 rpm, the air volume is 60000 m3/h, the wind pressure is 2500 pa, the current is 120 amperes, and the efficiency is 75%
If the rotational speed is 1000RPM=>1200RPM, it is increased by 1.2 times
The air volume is equivalent to 60000 m3/h * 1.2=72000 m3/h
Wind pressure equal to 2500pa * 1.2 * 1.2=3600pa
Current equivalent to 120A * 1.2 * 1.2 * 1.2=207A
The fan efficiency remains unchanged.
Is the FFU purification fan in the air conditioner hot? In summary, we can understand that it is very normal for the FFU purification fan wind to be hot. This is a normal situation that occurs during the operation of the air conditioner. However, if any abnormality is found in the operation of the FFU purification fan of the air conditioner, it should not be negligent, and attention must be paid to solving it.