There is no heating in the south, just turn on the air conditioner for heating, and it is not so low that the air conditioner needs defrosting outdoors. The functions of air conditioning are refrigeration, heating and dehumidification, and heating saves electricity than refrigeration. The energy efficiency label of my vertical air conditioner says that the electricity consumption in cooling season is 1288, and that in heating season is 829, which is nearly one and a half times lower. The electricity bill is less than 200 a month and 600 a winter.
When I was in college, a philosophy professor who studied the history of ideas said, Is human really evolving? You have to wonder: why don't we freeze as before? It can only be said that people become delicate as soon as they have money. The cold resistance of human beings is actually evolving.
Hesenberg said in his book Attack Homo sapiens that Homo erectus had a relatively high nose. According to some anthropologists' speculation, this kind of high nose is probably an adaptation to the cold environment, because the higher the nose, the larger the space of the nasal cavity, and the dry and cold air outside can fully contact with the nasal mucosa and blood vessels in the nasal cavity, so that the air can be heated before entering the lungs, so as not to hurt the lungs. The correspondence between nose and climate is still reflected in today's human society. The noses of Russians and Malaysians look obviously different.
The easiest way to resist the cold is to wear clothes. Humans first wore animal skins, which sounded very advanced, but it was smelly and dirty and didn't fit. About 6.5438+0.8 million years ago, the climate of the earth began to get cold, which was undoubtedly a great test for Homo sapiens who had lost their hair at that time, and it also became a powerful driving force for ancient humans to start wearing clothes.
One evening in the late Paleolithic period, several Homo sapiens marched with spears against the snow. They are indifferent to exposure to extremely cold weather, because they fold the time again and peel off the thick fur that other species have evolved over hundreds of thousands or even millions of years and put it directly on themselves. It's just that they can't help tickling their hands when they walk in the snow and ice, because lice suck their blood in their clothes.
Some misunderstandings about keeping warm;
1. Can hot drinks keep you warm?
Coffee, hot tea, hot chocolate and Gao Legao can even make you cold after drinking, because when drinking hot drinks, the receiver on the tongue will tell the brain that when it gets hot here, the brain will start a mechanism to help the body cool down, that is, sweating.
In cold weather, you need a hat because most of the heat is lost from your head?
Some people say that 50% to 70% of the body's heat is lost from the head. But the loss of heat is related to how much skin is exposed, not where it is exposed. The head only accounts for 10% of body heat loss. It's really good to cover your nose and mouth, so that the inhaled air becomes hot, and the lungs don't need to heat the air.
Don't wear too thick clothes.
If you wear too thick clothes, stress will affect blood circulation. Don't wear several layers of socks. In this case, shoes or boots are too tight, which will limit the blood flow. A pair of wool socks that absorb moisture and sweat is better than two pairs of cotton socks.