Explanation of the phenomenon of natural wind when heating the central air conditioner for a period of time

Explanation of the phenomenon of natural wind when heating the central air conditioner for a period of time Explanation-of-the-phenomenon-of-natural-wind-when-heating-the-central-air-conditioner-for-a period-of-time Friends who use heating in winter will find that it does not take long to turn on the central air conditioner and start heating, blowing hot air, but the wind that blows after a while will not be hot, and it will become natural wind. After a while, the hot wind will blow again. ,Why is this so? In fact, this is what we often say about air conditioning defrosting. Because when the air conditioner starts heating, the indoor unit blows out hot air, and the outdoor unit blows out cold air. This is heating by outdoor heat transfer. When the air conditioner is running, the temperature of the outdoor unit is lower than the indoor temperature, and the water vapor in the air will condense when it encounters cold, and frost is formed. Air-conditioning defrosting is a function of air-conditioning. This function is activated only under its heating conditions. The principle of defrosting is that after reaching certain conditions (each air conditioner has been set up: for example, the fin temperature is lower than the ambient temperature X° and lasts X minutes), the defrost starts, and the system changes to the cooling mode at this time, the four-way valve The functions of the internal and external units are interchanged, and the internal refrigerant of the external unit is high temperature and high pressure freon, which melts the ice cubes, and the defrosting ends when the set conditions are reached.

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