Yes, when the solar water heater is not used in winter, the water in the water tank should be drained. The water remaining in the water tank will freeze when the weather is very cold in winter and the temperature. is very weak. If it turns into ice, the water tank will freeze and crack easily. Therefore, the solar water heater tank must be drained in winter.
If you find that the solar water pipe is frozen, don't worry yet. Under normal circumstances, solar pipes may be automatically frozen when the weather gets warmer. You can also wrap the pipes with a towel and slowly douse them with warm water, or blow them with hot air to speed up defrosting.
Detailed information
Before the arrival of winter, preventive measures should be taken for solar water heaters. The first is to carry out an inspection ccomplete view of the solar system. water heater. The most important thing is to check whether the screws at the pipe interface are loose, whether the pipes are disconnected, leaking or cracked, and repair them in time if necessary.
When using solar water heaters in winter, the timing of adding water should be determined based on weather conditions. If the temperature outside is above freezing, you may consider adding water that night. below zero, it is best to add water the next morning to prevent the water outlet from freezing.
Can solar water heaters freeze in winter?
Solar water heaters can also be used in colder winters, at provided that they are regulated and protected. freezing, they can be used normally, let alone freezing. However, if management is neglected, freezing can occur.
1. The conducts ofOrdinary water, if not heated by heating tapes but only equipped with cotton insulating pipes, will freeze and crack during the cold winter. In particular, aluminum-plastic pipes, if used in winter, will freeze and leak if the temperature suddenly drops.
Solution:
①Drain the water accumulated in the water line during winter dormancy.
② When used in winter, heating tape can be wrapped; The water outlet of the water tank must be equipped with a drain valve. At night or on extremely cold days, drain the water in time. water pipe) after using water.
2. The vacuum tube is frozen. Vacuum tubes in good condition and used will never freeze. However, if incompetent pipes freeze and crack, they will leak.
①Air hose leaking. The tail of the vacuum tube is bruised or the exhaust is not factory clean, but the couchThe internal one is intact and not leaking, so it is not easy to find. This type of pipe loses its thermal insulation effect. Because there is no sun at night, the microcirculation inside the pipe stops and the water temperature at the bottom is low (even if the water temperature in the box is too high to freeze), the temperature drops very quickly when the temperature is extremely low at night, and the middle and lower parts of the leaking pipe will drop to the freezing point, the vacuum tube inflates.
There are two ways to find out. The first is to touch the outer wall of the tube under strong light at midday on a sunny day. If the tube is cold, it is a good tube; hot, it's a bad tube. Replace it. Second, check on a frosty or snowy day that there is no frost on the leaking insufficiency pipe and that there are no or fewer snowflakes falling on it (the cheat is dissipated outwards). This type of pipe is not damaged by freezing, but also experiences significant heat loss, which seriously affects the increase in water temperature. It must be replaced as quickly as possible.
②The water tank contains little or no water. If there is no water in the water tank but there is water in the vacuum tube, the temperature drops suddenly or the temperature drops again after several days of low temperature. Since there is less water in the water tank, the heat capacity is small, the air capacity is large, and the convection heat loss is large., the heat loss in the water in the vacuum tube approaches and descends to the freezing point, and ice forms in the tube and freezes the vacuum tube!
Solution: Fill the water tank after each use. The box is filled with water and has a high heat capacity. SinceThere is no air convection, the heat loss in the box is relatively small, and the pipes are not easy to freeze.
After two sunny days when the tank is full of water, the water temperature can reach 80 to 99 degrees (outdoor temperature is minus 10 degrees or lower). Even if it is cloudy for four or five days in a row without any heating, the water temperature can still reach over 30 degrees.
Most of them are now equipped with electric heating. When the temperature inside the box is close to the critical low temperature, power is supplied for heating and antifreeze.
3. Due to lack of cleaning, the lower part of the vacuum tube is densely accumulated with scale, which absorbs heat slowly and dissipates it quickly. It is easy to freeze and freeze when encountering low temperatures.
Solution: eachOnce you suspect scale buildup, clean it in time beforehand.
You also need to pay attention to the method when using solar water heaters. Use them in the right way to ensure the normal operation of the water heater and extend the life of the water heater.
Will solar water heaters freeze at minus five degrees in winter?
This phenomenon will occur when using solar water heaters in the north when the outside temperature is below zero. , the water in the water pipes will freeze and if it grows, the pipes may freeze and crack.
Use special solar pipes and special insulation for solar pipes. Even at low temperatures of -40°C, it maintains good flexibility. Pipes will not freeze or crack.
Many irresponsible manufacturers in China use polyethylene or ordinary insulation en rubber and plastic, covered with tape or aluminum foil. This type of insulation does not withstand high temperatures and can only be used below 80°C. When the temperature exceeds this range, it is easy for the thermal insulation to shrink and fail, and the water absorption rate is high. The lifespan of aluminum foil outdoors is 3-5 months in rainy and snowy weather. of water. In harsh winter, it is not thermal insulation but pieces of ice. Weather resistance is also extremely poor. The insulation cracks and breaks within a year or two, and disappears when the wind blows.
Let me answer for you!
No matter the brand of solar water heater, no matter how low the temperature is, it will not freeze. The frozen part is not actually the water heater. , but the water heater. As we all know, the "aluminum-plastic pipe" that connects our aindoor water supply and our drainage (water supply and our water consumption are the same pipe), the water will freeze when the temperature drops below freezing. The water heater is installed. There are double layers of insurance, one is to install "heating tape" on the aluminum-plastic pipe, and the other is to wrap "insulating cotton" outside the aluminum-plastic pipe. If construction workers are not responsible during installation, the temperature will drop below freezing. It is easy to freeze when the temperature is high (what I mean is that the heating tape is not tightly wrapped in the aluminum-plastic pipe. The other. is that it is not wrapped with thermal insulation cotton If the temperature of your house is around -5 degrees, one of the insurance measures taken, there will be no problem) However, even if the water heater freezes, there will be. . it's nota problem, but it is temporarily unusable. The following URL is my answer to other people's questions about this, you may want to check it out!
http://zhidao.baidu.com! /question/45016362.html
I wish you a happy Spring Festival
Be happy every day!!!