In the hot summer, especially in this hot weather, we can hardly leave the air conditioner! When it comes to turning on the air conditioner, everyone usually uses the cooling mode, but after a long time, it will always feel cold, uncomfortable, and heartache for electricity bills. Recently, some netizens introduced a "good way", saying that turning the air conditioner on to the dehumidification mode can also achieve the cooling effect, saving trouble and electricity. is this real?

We searched on the Internet and found that there is such a cool and energy-saving method, and it is very simple, as long as the air conditioning mode is changed from "cooling" to "dehumidification", you can easily enjoy the coolness brought by the air conditioning, And you can save a lot of money.

Seeing these reports, I can't help but guess that if the dehumidification mode is cooler and more energy-efficient than the cooling mode, why do manufacturers set the cooling mode? Do these reports have any scientific basis? Is dehumidification really that magical?

Dehumidifying cooler than cooling?

To understand these questions, we must first understand the working principle of cooling mode and dehumidification mode.

Refrigeration mode: The refrigerant in the air-conditioning pipeline is transformed into high-temperature and high-pressure gas through the compressor, and then condensed by the condenser to become a low-temperature liquid, and then the pressure is reduced through the throttle valve, and then enters the evaporator of the indoor unit. The temperature of the refrigerant liquid in the evaporator is very low, and it absorbs a lot of heat into gas during the evaporation process, so the air conditioner indoor unit will blow cold air at this time, thereby reducing the indoor temperature.

Dehumidification mode: The dehumidification of the air conditioner is a special cooling mode. In the dehumidification mode, in order to achieve a better dehumidification effect, the air conditioner generally works at a low air volume. At this time, the temperature of the heat exchanger of the indoor unit of the air conditioner is lower, which is more conducive to the condensation of water vapor in the air into water. Since water vapor condensation does not require much cooling, the compressor only needs to be intermittently started and stopped.

To put it simply, refrigeration is to continuously work to the set temperature, and continuously dehumidify when the temperature is lowered; dehumidification can be understood as intermittent refrigeration, and the wind speed is low, which makes it easier for the moisture in the air to adhere to the evaporator of the air conditioner. for the purpose of dehumidification.

Because in the dehumidification mode, the air output of the air conditioner is reduced, and it works intermittently, so the cooling capacity at this time is very small. Once the outdoor ambient temperature is slightly higher, the cooling capacity generated by the air conditioner in the dehumidification mode cannot meet the requirements of indoor temperature control. Therefore, it is unscientific to say that the dehumidification mode is cooler than the cooling mode.

Is dehumidification more energy efficient than cooling?

The reason why we feel that the power consumption in dehumidification mode is low is because the compressor starts and stops intermittently in dehumidification mode. Compared with general refrigeration mode, the working time of the compressor in dehumidification mode is shorter. The feeling of low power consumption. From this point of view, air conditioning dehumidification seems to be more useful than refrigeration, so let's turn on the dehumidification function! But don't do this, because once the outdoor ambient temperature is slightly higher, the cooling capacity generated by the air conditioner in the dehumidification mode cannot meet the requirements of indoor temperature control.

And through a large number of air conditioning energy efficiency tests, it is shown that the cooling efficiency of the air conditioner is the highest when the compressor runs stably and the indoor air volume is the largest. In contrast, in the dehumidification mode, the compressor starts and stops intermittently, and the air volume is low, so its cooling efficiency is naturally greatly reduced.

Comparison of Dehumidification and Refrigeration Experiments

Now I come to an office, which is about 25 square meters, and the indoor temperature is 32 degrees Celsius. We will use the cooling mode for ten minutes to see how many degrees the temperature will drop. "Ten minutes later, the thermometer showed 26 degrees Celsius, which was the preset temperature.

Now look at another office of the same size as the first for the second experiment. The other office is also 25 square meters. Now the indoor temperature is 32 degrees Celsius. It also uses the same model and brand of air conditioners. It adopts the dehumidification mode mentioned on the Internet. After ten minutes, the indoor temperature is 30 degrees Celsius. The previous 32 degrees only dropped by 2 degrees, and there is still a big gap from 26 degrees Celsius.

In humid and hot weather, turn on the "dehumidification mode" of the air conditioner, the water in the air will be quickly discharged outside, and the air conditioner will continue to blow cold air to keep the indoor temperature suitable, and the compressor and outdoor unit will stop running for a period of time. time, which saves some electricity than pure cooling mode.

However, if the outdoor temperature is very high and the air is very dry, use the cooling mode, and do not turn on the dehumidification mode for a long time, so as not to damage the compressor. Only in the evening when the temperature is relatively low and the humidity is high, the dehumidification mode can be turned on in time to achieve the effect of adjusting the temperature and humidity of the room.