The weather is 37 degrees, which is extremely hot. But people themselves are also at 37 degrees. Why don’t they feel extremely hot? (Please don’t scold me, I’m just confused)

The heat in the body cannot be dissipated ~ so you will feel irritable! ! ! If it goes on for a long time, it will cause heatstroke!

According to research by physiologists, when the indoor temperature is too high, it will affect people's body temperature regulation function, causing increased body temperature, vasodilation, accelerated pulse, and accelerated heart rate due to poor heat dissipation. In winter, if the indoor temperature is often kept above 25°C, people will suffer from fatigue, dizziness, slow thinking, and poor memory. At the same time, due to the huge difference in temperature between indoors and outdoors, the human body has difficulty adapting and is prone to colds. If the indoor temperature is too low, the metabolic function of the human body will decrease, the pulse and breathing will slow down, the subcutaneous blood vessels will constrict, the skin will be overly tense, and the resistance of the respiratory mucosa will weaken, easily inducing respiratory diseases. Therefore, scientists set the lower limit temperature of "cold tolerance" and the upper limit temperature of "heat tolerance" as 11°C and 32°C respectively.

While paying attention to indoor temperature regulation, you should also pay attention to indoor humidity. In summer, when the indoor humidity is too high, it will inhibit the body's heat dissipation, making people feel very stuffy and irritable. In winter, when indoor humidity is high, heat conduction will be accelerated, making people feel cold and depressed. When the indoor humidity is too low, due to a large amount of water loss from the upper respiratory tract mucosa, people will feel dry mouth, dry tongue, and even sore throat, hoarseness and nosebleeds, etc., and are prone to colds. Therefore, experts believe that the upper limit of relative humidity should not exceed 80% and the lower limit should not be less than 30%.

However, human body sensation is not simply affected by two factors: temperature or humidity, but the result of the combined effect of the two. Through experiments, the most pleasant indoor temperature and humidity are: winter temperature is 18 to 25°C, humidity is 30% to 80%; summer temperature is 23 to 28°C, humidity is 30% to 60%. More than 95% of people feel comfortable within this range. In an air-conditioned room, people will feel most comfortable when the room temperature is 19 to 24°C and the humidity is 40% to 50%. If the effects of temperature and humidity on people's thinking activities are taken into account, the most suitable room temperature should be 18°C ​​and the humidity should be 40% to 60%. At this time, people are in good mental state, have the most agile thinking, and have high work efficiency.