Exposure to the sun has many benefits, mainly as follows: 1. Ultraviolet rays from the sun can increase the activity of vitamin D. Exposure to the sun can promote the synthesis of vitamin D , increase its activity and promote the absorption of calcium, which is effective. It can prevent rickets, osteomalacia, osteoporosis, etc., and can promote the growth of adolescents. 2. Spend more time in the sun and receive appropriate ultraviolet radiation, which can effectively kill bacteria on the surface of the skin and reduce the occurrence of skin diseases. 3. Spending more time in the sun can relax your mood, reduce stress and improve mental depression, bad mood and other conditions. 4. Spending more time in the sun can slightly increase body surface temperature, promote blood circulation and metabolism, and improve physical fitness.
The exhibitionin the sun has certain benefits, but everything should be done in moderation, and excessive exposure to the sun cannot be carried out, as this will also be harmful to the body, as long-term exposure to ultraviolet. rays can also have harmful effects on the skin. 90% of the vitamin D needed by the human body must be obtained from sunlight. Vitamin D helps absorb calcium and phosphorus and promotes bone formation. Ultraviolet rays can also stimulate the bone marrow to produce red blood cells, improving hematopoietic function and thus preventing anemia.
What harm does solar water heater scale cause to water heaters and people?
Regular exposure to the sun has certain benefits for the skin. Exposure to sunlight can prevent skin diseases. Proper skin exposure to ultraviolet rays can effectively killbacteria present on the skin and increase the skin's resistance. However, you must master the right method and time and not stay in the sun for a long time, otherwise the ultraviolet rays will damage the skin and easily cause sunburn or sunburn. On average, at least 20 minutes of sunlight per day can meet the needs of the human body. Because the sun's ultraviolet rays promote the synthesis of vitamin D very effectively, for people without skin problems, about 30 minutes of sunlight per day can synthesize about 20,000 international units of vitamin D needed by the body.
How to bask in the sun in a healthy way:
1. It is not recommended to eat photosensitive foods such as mustard greens, pickles, lettuce, snails, shrimp, crabs and clams before basking in the sun to avoid causing a rash.photosensitive year or solar dermatitis. After sun exposure, you should drink more water, eat more fruits and vegetables, and take vitamin C supplements, which can inhibit melanin production.
2. Do not bask in the sun through the glass, because the glass can absorb the ultraviolet rays that play a role, so basking in the sun through the glass actually has no effect. You should go out and do activities. places with fresh air and bright sunshine.
3. You don't need to bask in the sun for too long, about half an hour is enough, or you can bask in the sun for a while and then cool off under a tree for a while. . Be especially careful not to get sunburned when the sun's rays are strong.
4. When you go out in the sun, the sunlight should be in direct contact with the skin. The skin can synIt produces vitamin D itself, which is beneficial for calcium absorption. It is best to go there around 10 a.m. and 4 p.m., or around 11 p.m. to 12 p.m. in cold winter.
5. Give your hands, feet, legs and back sun more often. People who are afraid of tanning their faces can stretch out their hands and feet to bask in the sun, or lounge on their backs. Whatever part of the skin is exposed to the sun, it can be tanned directly for the same effect.
1 The thermal conductivity of tartar is extremely low, less than one percent of that of metal. It adheres to the inside of the solar collector tube, thus preventing the transfer of heat absorbed by the collector tube. Water in time, making the temperature too high and easily bursting the pipe.
2 Scale corrodes the inner tank, causing water leakage, destroying the thermal insulation effect and reducing the service life.life of solar energy. In the past, the house's tin-plated iron solar panels leaked within a few years due to limescale corrosion.
3. Scale blocks the shower head, forcing you to replace the shower head frequently, leading to additional economic expenses. Scale blocks the pipes, causing poor water flow, forcing you to replace the faucet frequently.
4 Tartar will scratch your skin, clog pores and cause various skin diseases. There are also toxic substances - nitrates and nitrites, which can cause cancer. The main component of tartar is calcium carbonate. If you drink water every day, the accumulation of calcium carbonate in the body will easily make you suffer from various stone-related diseases.
It can be seen that the damage caused by scale in solar water heaters is so great. It is recommended that usersFrequently clean the scale in the water tank and vacuum tubes when using solar water heaters to maintain the basics of health.