? The solar water heater has two power outlets, one for water heating, which is used to heat water when the temperature is low in winter and the water temperature is not sufficient, and the other for the pipes. heating. During the cold season in the north, pipes freeze and pipes freeze until they thaw. These two outlets should only be plugged in when needed, and should not be plugged in when not needed to avoid unnecessary electricity consumption.
1. Operating temperature of solar water heaters
In winter in the north, the temperature is relatively low and solar water heaters are often cracked by frost. That's why many people like it. Solar water heaters hate it, especially now that the harsh winter is approaching, the temperature is dropping sharply and strong winds are coming. How to prevent solar water heaters from hibernatingand ensure that your family can take a warm bath in the cold winter. You need to understand some principles of solar water heaters.
Structure of the solar water heater
In winter, when the temperature is too low, the water in the solar water heater freezes, causing the pipe to burst. Professional maintenance personnel remind consumers that the cold resistance limit of solar pipelines is minus 3 degrees to minus 5 degrees. When the temperature is close to zero, it is best not to use the water heater, especially the water in the solar pipes should be drained in time to avoid freezing at night and causing the pipes to break. It is best not to turn on the water immediately after repair to avoid the temperature in the solar pipe being too high or the water temperature being too low, causing the pipe to burst.
?The upper and lower water pipesSolar water heaters are equipped with insulation layers, but this insulation layer generally can only maintain the normal use of the water heater at -3℃ and -4℃ below. high temperature, water pipes tend to freeze.
2. How to prevent solar water heaters from freezing
1. Check before use in winter
Inspection of solar water heaters
For solar water heaters in winter Beforehand, you must take preventive measures. First, perform a complete inspection of the solar water heater. The most important thing is to check if the screws at the pipe joints are loose, if the pipes are disconnected or leaking. , or cracked. If so, replace them promptly.
2. Take insulation measures for solar energy
For solar hot water pipes exposed to the outside, you should pay attention to anti-freeze measures, which can be carried out with cotton fabrics.on and in linen, plastic foam, etc. Bandage and insulation; water pipes should be installed with a water storage and drainage device to discharge stored water and prevent freezing; for actually frozen water pipes, if they are PP-R and PVC plastic pipes, can be applied with hot towels and then rinsed with warm water to thaw them. Never cook it directly on the fire and do not scald it with boiling water to avoid cracking the pipe.
When the temperature is below zero in winter, it is necessary to turn on the antifreeze device of the heating tape for preheating protection, especially in the very cold areas in the north, when the temperature drops to below zero. the antifreeze and preheating device is switched on.
Closed during the day. If the indoor temperature is below 0°C, pipe fittings, valves, sprinklers and other internal partsThe exterior must also be insulated to prevent frost cracking.
3. Pay attention to the time when water supply is selected.
When using solar water heaters in winter, the time of adding water should be determined according to weather conditions. the outdoor temperature is below zeroIf the outdoor temperature is below zero, it is best to add water the next morning to prevent the water outlet from freezing.
4. Antifreeze venting method
Antifreeze for solar water heater
If the temperature is too low in winter or the solar water heater is not used for a long time period, the water supply valve of the water heater should be closed and drain the water into the upper and lower pipes of the water heater to avoid freezing and cracking of water pipes caused by low temperatures and lack of water circulation.
5. Mdrip antifreeze method
For solar water heaters without antifreeze heating tapes, you can only choose to use the traditional drip antifreeze method if the weather is cold, you can turn. on hot water Place a basin of water under the sprinkler head or faucet, loosen the hot water faucet a little, turn it to the minimum and let the water flow drop by drop, in order to avoid prevent the water pipe from freezing and cracking.
3. How to Defrost Solar Water Heaters
Defrost Solar Water Heaters
Many people are more careful when using solar water heaters in winter, but we should pay attention In addition, solar energy is usually equipped with a heating and antifreeze device. Many consumers often use it to defrost frozen pipes. This is not good and can easily harm the lifespan of solar energy.
A better way is to pay attentionnotice the weather in time. When the temperature is below zero, turn on the anti-freeze device and preheat the solar water heater without worrying about energy consumption. Especially in very cold northern regions, where the temperature is always below zero, the heater and antifreeze device must be turned on at all times. If the nighttime temperature is relatively low in other areas, the antifreeze device can be activated at night and turned off during the day. When taking a shower, be sure to unplug and turn off the power supply to avoid accidents caused by loss of thermal balance.
Thawing solar water heaters
Handling frozen pipes: In winter, it is very common for pipes to be frozen. If it turns out that the pipes have frozen but are not yet cracked, this will be normal once the temperature rises. It can be cleared automatically. You can alsot use a hair dryer to blow on the water line, or wrap a towel around the water line, then slowly pour it with warm water. Do not cook it on fire, hit the water pipe, or scald it with boiling water, because. this will cause the pipe to burst. Multiple freeze blockages can easily cause pipes to freeze and crack. Pipe insulation measures must therefore be reinforced.
The return pipe of the solar water heater is frozen. The user can directly unscrew and remove the frozen return pipe from the structure and replace it with a new return pipe. The precautions for replacing the return pipe are as follows:
1. When small diameter pipes are solvent bonded, the socket should be rounded to form a bevel and the fracture should be flat and perpendicular to the axis. , so that it is only in this way that the linkits can be firm and avoid water leakage.
2. Generally, PVC pipes with a diameter of 100mm or more use rubber ring interfaces. Before installation, personnel should be willing to chamfer the pipe insertion part, and the quality of the rubber ring should also be checked to see if it is qualified. The socket, rubber rings, etc. must be wiped clean during installation.
3. Excavating a trench for traditional pipeline installation only requires that the pipe can be placed in the trench and sealed if there is no gap. When there is a layer of soil of Originally, there is no need to pressurize and compact the cushion layer.
4. Generally, PVC pipe branch pipes can be opened with tees or vertical water plugs. During construction, you can add a saddle fitting and a two-in-one half tee,and tighten it with U-shaped bolts, thereby thickening the pipe wall, then directly drill holes and cut teeth on it, then use externally threaded plastic parts to connect them.
The test shows that the pressure test and acceptance after construction using this method can fully meet the requirements of the specification. In addition, thrust pillars should be installed at locations where water flow in the pipe generates thrust, such as elbows, tees and pipe end sealing plates, to resist the flow thrust of water.
Note: Solar water heaters convert solar energy into thermal energy and heat water from low temperature to high temperature to meet people's use of hot water in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat plate solar water heatersbased on their structural forms, evacuated tube solar water heaters being the main ones.
Detailed information:
Return pipe characteristics:
1. Good hygienic performance: No heavy metal salt stabilizers are added when processing PE pipes. The material is non-toxic, has no scale layer and does not produce bacteria. It can well solve the secondary pollution of urban drinking water.
2. Corrosion resistance: With the exception of a few strong oxidants, it can resist erosion from a variety of chemical media;
3. Long service life: Under rated temperature and pressure conditions, PE pipes can be used safely for more than 50 years.
4. Good impact resistance: PE pipe has good toughness and high impact resistance. Heavy objects can directly ppass through the pipe without causing it to rupture.
5. Reliable connection performance: The strength of the hot melt or electrofusion interface of the PE pipe is higher than that of the pipe body, and the joints will not be disconnected due to ground movement or live load. .
6. Good construction performance: the pipeline is light, the welding process is simple, the construction is convenient, and the overall project cost is low.
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