Questions about the temperature and bodily sensation of the air conditioner

The landlord is a caring person, let me explain.

The heat transfer mode is divided into three ways: convection, conduction, and radiation.

70% of a person's temperature perception is determined by "radiation", such as sun exposure.

When you say 20 degrees in summer, you mean the temperature of the air measured by the thermometer, and the temperature of glass, walls and various outdoor objects is higher, so you still feel hot.

In winter, the temperature of the walls, floors, glass on windows, the ground outside the windows, etc., is lower than the indoor air temperature, or much lower than in summer. So, when you have an indoor air of 22 degrees, you still feel much colder.

Your question is actually the relationship between a standard temperature and a perceived temperature, and I quote the information of People's Daily Online that may be helpful to your question.

Why is it that sometimes, when our body feels unbearable heat, the Meteorological Observatory does not issue a high temperature warning signal? Is there a mistake on the part of the meteorological station? No!

The human body temperature is a different concept from the temperature of **. Under normal circumstances, in order to maintain their own constant temperature, the residual heat generated by the metabolism in the body must be discharged from the body through conduction, convection, radiation and other forms, so that the body temperature and the outside temperature can reach a balance. If the temperature rises, the heat dissipation by conduction and radiation decreases, and the heat dissipation by sweat evaporation will gradually increase.

When the temperature is 35-39, two-thirds of the body's residual heat will be expelled through sweat evaporation. According to statistics, when the relative humidity is lower than 60%, the temperature must be higher than 35 to feel the heat; But when the relative humidity reaches 70-80%, the temperature 31 begins to feel hot, if the relative humidity exceeds 80%, the humidity in the air is greater, the sweat on the body is not easy to evaporate, and people will feel stuffy and unbearable.

The maximum temperature of the meteorological observatory** is the temperature of the air flow in the state of nature, which is the standard temperature. It was measured in a louver box. The louver box is placed on a lawn that is protected from direct sunlight, wind, rain and ventilation.

The thermometer is placed in a louver box and the data is measured at a distance of meters from the ground. This is a standard uniformly set by the Global Meteorological Organization. It represents the standard air temperature in its natural state, which is not disturbed.

The fact that the Meteorological Observatory did not issue a high temperature warning signal was due to the difference between the perceived temperature and the standard temperature.

In addition, there are many environmental factors that affect the "perceived temperature", such as the different properties of the ground surface and the surrounding temperature. When the air temperature is 37 -38, the surface temperature can generally reach 60 -70. If you stand on a concrete floor or asphalt road at this time, you will feel more than 40 years old.

This is due to the sensation caused by the high surface temperature and fast heat transfer. Coupled with the effects of direct solar radiation and the "heat island effect" in the city, the temperature of the surrounding environment will rise, and people will naturally feel that the temperature is over 40, and the feeling of standing on the lawn is different. In addition, people's "body temperature" will also vary depending on skin color and age.

People with dark skin have a strong ability to withstand high temperatures due to their deep pigmentation, which can reduce the invasion of the sun's ultraviolet rays, and their "body temperature" is lower than that of people with light skin tones; However, due to the gradual aging of blood vessels, the dilation performance of the elderly has deteriorated, and the ability to resist high temperature has decreased, and their "body temperature" is higher than that of young people. According to statistics, in the UK, almost all deaths of the elderly in summer occur when the temperature is 37. In fact, the human body has an ability to adapt to high temperatures, when the body temperature rises and the blood is too hot, the human body will naturally speed up sweat and heat dissipation by dilating blood vessels.

Of course, when this adaptive capacity exceeds the limit, the human body will develop pathologies or produce death, especially people with heart disease and high blood pressure, who are more likely to die in heat waves.

The set temperature is not the same as the actual temperature, I believe that the room temperature really drops to 20 degrees in summer, not to mention wearing a shirt, even if you add a coat, you are also a little cold.

Cooling control buried fibrillation technology can automatically sense the outside temperature and adjust its working state at any time to prevent the user from feeling too low and causing unnecessary bending energy waste.

Ten minutes before the start of operation, the air deflector is supplied downward to cool the activity area of the person and cool the human body first. When the cooling sensation reaches a certain level, the air is sent upwards to cool the whole room. According to the temperature change of the air supply outlet, the upper and lower wind direction is adjusted, which not only avoids overcooling, but also prevents the air conditioning disease caused by blowing cold air for a long time, and protects human health.

Principle of somatosensory control:

The somatosensory control is mainly realized by the temperature sensing software of the remote control, and the remote control sends the temperature signal around the collected remote control to the indoor unit receiver at a fixed time, and the indoor unit adjusts the press frequency according to the feedback information of the remote control to indicate the changes in the surrounding environment.

When the air conditioner is running, because the hot air rises and the cold air falls, if only the sensor of the internal machine body is used, the temperature measurement will be inaccurate, if a temperature measurement sensor is added to the remote control, and then a human-computer dialogue function is added, so that when you put the remote control state around you, the remote control will send a signal to the internal machine every three minutes to more accurately regulate the temperature of the air conditioner.

It is normal for the human body to feel high in a hot air-conditioned room or under climatic conditions, and this is not a high fever.

However, this is only a high body temperature on the outside, including high body temperature due to physical labor and sports, and it is not a high fever. However, you should drink more warm water after cooling down in moderation, do not eat cold food and cold drinks, let alone blow fans, and cannot be directly blown by cold winds, otherwise the cold will worsen. You can lower the temperature of the air conditioner, reduce clothing appropriately, and pay attention to salty food intake to replenish the fluid energy of the body and prevent collapse and heat stroke.

Note that it is winter, so don't suddenly leave the room with a higher temperature and go outside in a colder room, the temperature difference is more than 6 degrees Celsius, and you must pack your clothes before going out. Before going to bed, drink a bowl of ginger and brown sugar to boil for 20 minutes to make a soup, and proper sweating will also help to heal the cold. If you sweat continuously for a long time while sleeping, you should change your underwear in time to prevent the sweat-soaked underwear from being cold and cold, which will lead to the aggravation of the cold.

In short, if the cold worsens, you should seek medical attention in time and take medicine and injections.