According to physiologists, when the indoor temperature is too high, it will affect the thermoregulatory function of the human body, due to poor heat dissipation and cause an increase in body temperature, vasodilatation, pulse rate, heart rate accelerated. In winter, if the indoor temperature is often kept above 25 ℃, people will be tired, dizzy, dull thinking, poor memory.
At the same time, due to the temperature difference between indoor and outdoor, the body is difficult to adapt, easy to catch a cold. If the indoor temperature is too low, the body’s metabolic function will be reduced, pulse, breathing slowed, subcutaneous vasoconstriction, excessive skin tension, respiratory mucosa resistance is weakened, easy to induce respiratory diseases. Therefore, scientists have set the lower temperature of “cold tolerance” and the upper temperature of “heat tolerance” at 11℃ and 32℃ respectively. While paying attention to indoor temperature regulation, attention should also be paid to indoor humidity. In summer, when the indoor humidity is too high, it will inhibit the body’s heat dissipation, making people feel very hot and irritable. In winter, when the indoor humidity is high, it will accelerate heat transfer, making people feel cold and depressed. When the indoor humidity is too low, people feel dry mouth, dry tongue, even sore throat, hoarseness and nasal bleeding because of the large amount of water loss in the mucous membrane of the upper respiratory tract, and are susceptible to colds. Therefore, experts believe that the upper limit of relative humidity should not exceed 80% and the lower limit should not be lower than 30%. However, human body sensation is not simply affected by two factors: temperature or humidity, but the result of a combination of both. Through the experimental measurement, the most pleasant indoor temperature and humidity is: winter temperature of 18 to 25 ℃, humidity of 30% to 80%; summer temperature of 23 to 28 ℃, humidity of 30% to 60%. More than 95 percent of people feel comfortable in this range. In air-conditioned rooms, people feel most comfortable when the room temperature is 19 to 24°C and the humidity is 40% to 50%. If we take into account the influence of temperature and humidity on human thinking activities, the most suitable room temperature should be high efficiency. 18 ℃, humidity should be 40% to 60%, at this time, people’s mental state is good, the most agile thinking.
Winter is a dry season, plus the great modern inventions – heating and air conditioning, resulting in winter indoor more dry. The harm of dry indoor air is not small, how to easily relieve the problem of indoor dryness is an important aspect of winter health.
First, indoor dryness in winter, family members should be careful of “heating disease”
Winter indoor heating open, doors and windows tightly closed resulting in poor air circulation, dry, will cause a decline in immune function and resistance, resulting in people irritability, dry nose and throat, dizziness, weakness and so on, these symptoms are called “heating disease”. In the cold season heating, people want the heating to burn hotter, but because the doors and windows are closed, the air circulation is not good and dry, plus heating, air conditioning, electric heating and other heating facilities will cause the room temperature to be too high, making the indoor air drier, pollution increased, providing a “hotbed” for the breeding and spread of germs, resulting in colds and other respiratory diseases The incidence of respiratory diseases such as colds and flu increases dramatically. It may also cause a decline in immune function and resistance, leading to “heating sickness”.
Families using heaters should pay attention to the humidity of the living room, it is best to have a hygrometer, in general, people live in a relative humidity of 45% to 65% RH, humidity index of 50 ~ 60 of the most comfortable environment; and indoor humidity in the winter heating period is usually only 15% RH. If the relative humidity is low, should be adjusted accordingly.
First of all, in a dry environment, the resistance of human respiratory system is reduced and it is easy to trigger or aggravate respiratory system diseases. Some research results show that when the air humidity is lower than 40% RH, the respiratory mucosa of the nose and lungs is dehydrated, elasticity is reduced, mucus secretion is reduced, the movement of cilia on the mucosa slows down, dust, bacteria, etc. are easily attached to the mucosa, stimulating the larynx to trigger coughing, but also prone to bronchitis, bronchial asthma and other diseases of the respiratory tract.
When the room temperature reaches above 24℃, it will make the indoor air abnormally dry and destroy the warm and humid environment in people’s bodies, affecting their secretion of body fluids, which not only makes people feel hot and dry, but also have difficulty breathing and abnormally dry feeling in eyes, ears, mouth, nose, throat and skin. Many nasal bleeding, nasal mucous membrane erosion is the trouble of dryness. For people who need to go out frequently, the room temperature is too high, so that the temperature difference between indoor and outdoor increases, which will make people’s resistance to decline, making it very easy to suffer from respiratory infections, asthma, bronchitis and other diseases. Therefore, only by ensuring that the indoor air is fresh and moist, people’s health can also be better protected.
When the air is dry, influenza viruses and gram-positive bacteria that can cause infections multiply faster and also tend to spread with the dust in the air, causing diseases. Dry air dehydrates the body’s epidermal cells and reduces sebaceous gland secretion, leading to rough, wrinkled and even cracked skin. Therefore, allergic diseases such as atopic dermatitis and itchy skin discomfort are also related to dry air. Dry air also has a negative impact on human immunity. Japanese experts found that the incidence of allergic diseases in Japan rose by 33% in the 30 years from 1961 to 1991. This phenomenon is related to people living in a dry environment for a long time, which eventually leads to the decline of human immunity.
8 secrets to relieve dry indoor air
1.Put a humidifier indoors
However, experts remind, humidifier is not a sterilizer, be sure to clean regularly. Otherwise, it is easy to cause respiratory diseases. Use humidifier precautions: arthritis, diabetes patients caution air humidifier.
Humid air will aggravate the condition of such patients. If such patients do need to use a humidifier, they should discuss and communicate with a specialist to determine the appropriate humidity level to stabilize the original disease. It is best to change the water daily and clean it weekly. Humidifiers should be changed daily, and preferably cleaned once a week to prevent microorganisms in the water from being dispersed into the air. Can not directly add tap water to the humidifier.
Because tap water contains a variety of minerals, it will cause damage to the evaporator of the humidifier, and the water alkali contained in it will also affect its service life. Chlorine atoms and microorganisms in tap water may blow into the air with the water mist to cause pollution. If the tap water hardness is high, the water mist emitted by the humidifier will produce white powder due to the presence of calcium and magnesium ions, which will pollute the indoor air.
Adjust the humidity of the humidifier according to the weather conditions, indoor and outdoor temperatures.
Indoor humidity should be controlled within a reasonable range, that is, 40% to 60%. Therefore, the use of humidifiers in the family, you may wish to buy a hygrometer at the same time, regular observation of the humidity of the indoor air, humidifier usually also timely filling, regular water changes, pay attention to cleaning.
2, open the window ventilation
When the weather is good, open the windows for ventilation, nature’s air is always very pure. However, the emphasis on ventilation, does not mean that the whole day windows and doors open, to reasonably choose the ventilation time. According to research tests, in cities where industry is concentrated, there are two pollution peaks and two relatively clean lows during the day and night. The two pollution peaks are generally around sunrise and in the evening, and the two relatively clean periods are around 10 a.m. and 3 p.m., when windows can be opened as appropriate.
The time and number of window openings in a day can be arranged according to the size of the house, the number of people, living habits, the level of indoor pollution and weather conditions. In a space of 100 cubic meters, for example, the air can be exchanged in about ten minutes without wind and at a temperature difference of 20℃ between indoor and outdoor. If the temperature difference between indoor and outdoor is small, the exchange time should be extended accordingly. Winter days are cold, but the windows should not be opened less than twice a day, no less than 15 minutes each time, up to 30 minutes.
3.Keep some flowers and plants
In the room to keep some potted plants and flowers (roots directly in the water), such as “Fugui bamboo”, found in the flower market, the relative humidity here is relatively higher than the general humidity of the place, it seems that the plant humidification method is still more effective. So most people use a lot of these plants to regulate indoor humidity.
But doctors say that not all flowers are suitable for regulating room temperature and humidity. The doctor explained that not only mimosa, many common flowers are highly toxic: the leaves and bark of oleander contain oleander glycosides, which can be poisoned by accidental ingestion; the sap of Calla lily, turtleback bamboo and other plants of the family Tennantaceae can cause itchy and painful skin; daffodil flower heads contain lacodin, which can cause enteritis, vomiting or diarrhea by mistake, and the leaves and flower sap can make the skin red and swollen; lilacs and nightshade will be heavily scattered in the evening to strongly stimulate the sense of smell micro-particles at night, which has an effect on patients with high blood pressure and heart disease. What are the best plants to keep indoors in winter? Experts say that cactus, hanging orchids, fuchsias and Brazil wood are the best choices. Cactus can exhale oxygen at night, making the air moist and mild; hanging orchids, Brazilian wood and other large leafy green plants can evaporate more water from the leaves, increasing indoor humidity; ornamental green plants such as bamboo also has a good “disinfection” function. However, experts remind, indoor plants should not be too much, generally a room one or two pots can, and to often water the plants.
4.Breeding ornamental fish
The main reason for keeping fish is to have a fish tank, fish tank to have water. With water, it is possible to evaporate, after evaporation, water vapor can make the humidity of indoor air rise.
5, on the heating or air conditioning side of a towel
Towel to have water, sufficient water can evaporate, making the humidity of the room rise. In addition, once the towel is dry, we must add water in time, otherwise, it is not effective drops.
You can also place a basin of water under the heater, with an old towel (or absorbent cloth), one end in the water, one end on the heater, so that day and night can evaporate 3 liters of water to the house, it is very useful. If each heater can do so, the sense of wetness will be more pleasant.
6, homemade small humidifier
Cut open a small Coke bottle upside down, screw the lid, reverse the plug in the middle of the heater, you can put a few more, add a little water every day, quite useful.
7, sprinkle a little water in the room or put a pot or two of water
House warm will speed up the evaporation of water, but also will have a better effect on the humidity to enhance the effect, this is a common method at home.
8, diligent mopping
My family recently wipe the floor more times up, indeed, after wiping the humidity from more than 20 to more than 40, or more effective, but this will test the diligence of everyone.
9, diet regimen.
In the diet should eat more moist and has a warm nature of food, eat more sesame, glutinous rice, radish, tomatoes, tofu, rhizome, silver fungus, duck, pear, persimmon, green fruit, etc., drink more vegetable soup, soy milk moisten the lungs, nourish Yin and clear dryness; eat less hot food. Diet: eating more cabbage is beneficial. In the diet to supplement water and nutrition in winter is also necessary, one can eat more millet porridge, vegetable porridge and other porridge food; second, available vegetables and eggs to make soup, spinach, rape, tomatoes and eggs to make soup are good choices. In addition, the traditional winter food cabbage is also a good choice for hydration and nutrition, and can be used to stir-fry or stew. And for people who are prone to dry cough in winter, you can use lily, silver fungus and other foods.
10. Drinking water in moderation.
Currently affected by indoor heating and the dry winter climate in the north, the body’s water balance is facing challenges, so in daily life must pay attention to replenish water. The method of replenishing water is very simple, such as drinking 1000-2000 ml of water every day can basically meet the body’s water needs. It should be reminded not to binge drink, the most appropriate way to drink water is “a small amount of frequent drinking”, that is, drink water in several times, each time the right amount. In addition, you can also drink more milk and soup to replenish water and nutrition; more fruit is also a very good choice, even in winter now fruit varieties are also very rich, such as apples, grapefruit, oranges, etc. can both replenish water and vitamins, etc., to prevent dry lips, dry skin are very good.