A cold autumn rain, since October, with the fall of several autumn rains, Beijing has entered the late autumn, unconsciously, the temperature of the night has dropped below 10 degrees, and even the northern mountains have fallen snow, winter The pace is not far off.
For the residents of Beijing, central heating is enough to resist the strong lethality of cold air, but there is still nearly a month away from the November 15th of Beijing's legal central heating, which is excluded from the Qinling Huaihe River outside the central heating zone. The local residents are even less fortunate to have central heating. How does the cold weather strike us to let us have a warm winter?
In addition to going home to wear long trousers, we would like to thank the "Willis Carrier" invented the air conditioner. Air conditioning is one of the greatest inventions in human history. It can not only cool but also heat. Think of the summer a few months ago, the heat is very hot, it is the air conditioning to bring cool to everyone; now, the temperature is plummeting, the chill is pressing, and the air conditioner can bring warmth to everyone. Here, the Economic Daily - China Economic Net's Xiaobian will tell you about the heating principle of household air conditioners and how to use air conditioners properly for heating.
Air conditioning heating principle
The first heating method is opposite to the air conditioning refrigeration principle. The refrigerant filled in the heating and cooling air conditioner has the characteristics of condensing liquefaction and heat release, and evaporating gasification and heat absorption. When the air conditioner is heating, the compressor pressurizes the gas condensing agent to become a high-temperature and high-pressure gas, and then condenses and liquefies through the heat exchanger of the indoor unit to release a large amount of heat and increase the temperature of the indoor air. However, if the outdoor temperature is lower than 7 °C, the heat exchange efficiency will start to decrease. The fixed-frequency air conditioner generally loses the heating function when it reaches -5 °C. Some inverter air conditioners can work normally at -15 °C.
The second heating method is electric auxiliary heating. Simply speaking, in the case that the first heating method cannot meet the heating requirement, the electric heating pipe is used in the vicinity of the air conditioning outlet by installing a similar electric heater. A heating material such as a PTC is externally heated, and then a hot air is blown through a fan of the air conditioner indoor unit to blow out hot air. Electric auxiliary heating is relatively power consuming because it requires heating of the electric heating tube.
How to properly use air conditioning for heating
The number of air conditioners should be the same as the size of the room : the air conditioner should be installed to match the room area to avoid the situation of “small horse-drawn cartsâ€, that is to say, the number of air conditioners is small, but the area of ​​the room is large and the corresponding heating effect cannot be achieved. . The heating area of ​​1P heating and cooling hangs is 8-14 square meters. The 1.5P cold and warm hanging mechanism has a thermal area of ​​10-18 square meters. If it is the top floor of the building or the sealing is not good, the number of points should be increased.
Set reasonable temperature : In winter, the air conditioning temperature can save more than 10% of electricity by 2 degrees. Therefore, under the condition that the air conditioning set temperature can be warmed, the lower the better, the better. In addition, since the hot air is lighter than the cold air, the hot air easily floats above the space, so that when the wall-mounted air conditioner is used, it is preferable to lower the tuyere angle and save power.
Reasonable wind speed, not frequent switching : When the air conditioner is turned on, the wind speed should be set to high wind speed, which can speed up the hot and cold exchange of temperature. When the temperature is close to the set temperature, the wind speed can be set to low wind speed. Do not switch the air conditioner frequently after the air conditioner temperature reaches the standard. This will consume more power and also have a certain loss to the compressor.
Timely humidification : Due to the heat of air conditioning, especially the air conditioning heating by electric auxiliary heating, it is easy to cause the indoor air to be too dry. Therefore, it is necessary to use humidifier humidification in the air conditioning heating in winter.
Timing ventilation : In order to use the heating effect, when using air conditioning and heating, it is generally closed doors and windows, and the cold air is separated by thick curtains. The effect of heating is good, but the air in the air-conditioned room is not circulating. There are many harmful bacteria that are easy to survive in such an environment, and should be ventilated in time.
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