Difference Between Dehumidifier And Air Conditioner

Author: Deye
Last Updated:

Air conditioner cooling and dehumidification mode

The working principle is: the temperature of the humid air will drop greatly after passing through the evaporator, the air humidity is in a super-saturated state, and the excess water vapor is precipitated in the form of condensed water, which is condensed on the fins of the evaporator, that is condensation. When the cooling mode reaches a certain equilibrium state, the air humidity will drop to a certain level.

In the rainy season in the southern region, the humidity is often more than 80%, and the temperature is also low. Most of the time is below 20 °C. At this time, the air conditioner is used to cool and dehumidify, and the cold air is blown out. The colder the dehumidification, the less the feeling is. Comfortable, and no matter how low the temperature is set, it will often stop automatically after reaching the lower limit of setting. In some models, the minimum temperature is only 20 °C, and it can not be cooled and dehumidified at all. In addition, as the air temperature decreases, the temperature difference will not be able to effectively condense the water vapor. Therefore, the air conditioner cooling and dehumidification is actually a limited degree of dehumidification.

Air conditioner independent dehumidification mode

The working principle is that the air cooled by the evaporator is reheated to the original temperature and then sent to the room. The indoor fan has been running at a low speed, the compressor is turned on and off, and the refrigeration system has an intermittent refrigeration cycle. The amount of refrigeration generated is mostly used to balance the latent heat of the indoor air, that is, the water vapor becomes condensed water. A small portion is used to balance sensible heat, which is to reduce the indoor temperature. This cycle continually reduces the indoor humidity to a certain level.

When the independent dehumidification function of the air conditioner is operated, the cold air is blown. The lower the dehumidification environment temperature is, the lower the dew point temperature of the air is. The closer to the surface temperature of the evaporator, the smaller the temperature difference is, and the dehumidification becomes worse. In addition, since the air conditioner is fixed, it can only be dehumidified in a small area, and the power consumption is large, and the compressor is opened and stopped to shorten the life of the machine. Therefore, the air conditioner should not be used instead of the dehumidifier.

Dehumidification mode of dehumidifier

The working principle is that the fan draws humid air into the machine, and the higher temperature humid air contacts the evaporator at a relatively low temperature, at which time the water in the air condenses into small water droplets and stays on the surface of the evaporator.

Then, the water slowly collects into the water pan, then flows into the water tank from the water outlet, or directly drains from the drain pipe, turns into a dry air through the condenser, takes away the heat generated by the work and discharges it to the outside. When the indoor temperature is lowered, the temperature will rise slightly, but the temperature difference is not obvious.

Taking the DEYE dehumidifier as an example, the dehumidifier of 20L/D dehumidification has a rated power of about 300W, and the power consumption is relatively low.

The dehumidifier is mobile, easy to store in a targeted manner, and can be used in a 5-32 ° C environment for a wider range of applications.

Prices of dehumidifiers and air conditioners

When it comes to compare dehumidifiers prices with air conditioner, usually,the dehumidifiers is much cheaper than air conditioners and use less electricity. Once you decide to buy them, consider your budget please.


You can see that there are so many differences when you compare dehumidifiers with air conditioners. In summary, the air conditioner can be used instead of the dehumidifier, but it cannot be completely replaced. The air conditioner is suitable for the hot summer season, which is cool and can reduce the humidity of the air. The dehumidifier is suitable for use in seasons where the temperature is not high but the humidity is too high. The dehumidification effect is fast and the indoor humidity is maintained at the set humidity.