How to switch freely between cooling, heating and dehumidification modes

How to switch freely between cooling, heating and dehumidification modes

Nowadays, the air conditioner has become a must-have household appliance for every household. In different seasons, for us, we can adjust the temperature with our fingers and realize the switching of different functions. But you know that when you press the button, what happens in the air conditioner How about the change? Today, the editor will take you to understand the relevant knowledge.

To understand the operating principle of the air conditioner, we must start with the internal structure of the air conditioner. The air conditioner we commonly use is generally a split air conditioner, which consists of two parts: the external unit of the air conditioner and the internal unit of the air conditioner. The external unit is placed outdoors with a condenser and compressor. The internal machine is placed indoors, which contains an evaporator, an expansion valve and a cross flow fan. It should be noted that the condenser and the evaporator are actually heat exchangers, but they are called different names according to different uses.

　　Refrigeration cycle

In the refrigeration cycle, the air conditioner reduces the refrigerant pressure through the expansion valve to lower the boiling point of the refrigerant, so that the refrigerant boils in the indoor evaporator and turns into vapor. The vapor flows to the outdoors, and then pressurized by the compressor to liquefy and liquefy it. The absorbed heat is released, and then flows back into the room, and the heat in the room is transported to the outdoors through continuous reciprocating circulation.

　　 heating cycle

　　 In the heating cycle, the four-way valve used in the air conditioner allows the refrigerant to flow in the opposite direction to the refrigeration cycle. The specific cycle is: the compressor pressurizes the refrigerant and sends the high-pressure gaseous refrigerant to the indoor heat exchanger, and the refrigerant liquefies to release heat.

　　 But in winter, there is a big temperature difference between indoor and outdoor. Many air conditioners in China are equipped with electric auxiliary heating. Electric auxiliary heating is similar to a hair dryer. It is to install a heating wire at the air outlet to warm the wind.

　　 dehumidification mode

As for dehumidification, when the air conditioner is cooling, the indoor evaporator is constantly absorbing heat, and the temperature will be in a lower state. In order to make the cooling more efficient, the blower continuously sucks indoor air through the evaporator to speed up the heat exchange process. When the air is cooled, the moisture in the air becomes condensed water, which is finally collected in the water collector and discharged outside. So in fact, the air conditioner working in the cooling mode will be accompanied by a certain degree of dehumidification. The dehumidification mode is also designed according to this principle, so how can we make this dehumidification process more efficient and make dehumidification independent as a function?

　　In the dehumidification mode, engineers lowered the speed of the compressor and blower to allow enough time for the water vapor in the air to condense, thereby improving the dehumidification efficiency and making it an independent function.

　　Since dehumidification is accompanied by refrigeration, how do those high-end air conditioners on the market claim to be able to dehumidify at a constant temperature?

　　The answer is actually very simple. This type of air conditioner only heats the cooled air during the air supply, so that people will not feel the temperature drop while dehumidifying, making the dehumidification function a function that can be used all year round.

It should be noted that in summer, when the temperature is set to 26~27 degrees Celsius, the cooling load can be reduced by more than 8%; in winter, when the temperature is set 2 degrees Celsius lower, it can also save 10% of electricity; when a person sleeps, the metabolism Reduce 30%~50%, set the air conditioner to sleep mode, set the temperature to 2 degrees Celsius higher, and save 20% of electricity.

　　Practice has also proved that for people who sit quietly or work lightly, if the room temperature is maintained at 28~29 degrees Celsius and the relative humidity is maintained at 50%~60%, people will not feel stuffy and sweat, which belongs to the comfortable range.