There are three possible situations for this phenomenon:
1. A rainy day without sun
You should know that if there is no sun outside, a rainy day is normal. There is no hot water available from the solar water tank.
At present, whether it is the current single-chamber solar water heater or the three-chamber solar water heater, as long as the water tank is equipped with a built-in electric heater and the meter also has an auxiliary heating function setting, you can choose to heat it and you will have hot water.
PS: It should be noted that the heating time of a single-chamber solar water heater often takes 1-2 hours or even longer, so the heating time should be arranged in advance , otherwise it affect the use; in addition, the automatic heating mode can also be set, but the power consumption is relatively large;
TroThe solar energy warehouses are divided into three independent warehouses, and the heating is only the third. warehouse, which is equivalent to an electric water heater, so the heating time will not be long and unnecessary.
2. When there is sunshine but insufficient exposure in winter
First: If there is sunshine in winter but insufficient exposure, the normal water temperature of the solar water tank should be around 30°C. -40 degrees (After excluding the addition of cold water), in this case, if the meter does not display any temperature, check if the failure of the temperature probe causes a display error if there is no actually has no temperature, it is a problem of heat absorption in the vacuum tube or it is blocked!
Second: The solenoid valve may be defective and cannot be closed. The cold water is constantly renewed, which prevents the water temperature from increasing; The theger problem can be caused by a water leak in the pipes!
3. Sufficient sunshine
Before: If the solar water heater does not produce hot water, first check whether the temperature displayed on the meter is normal (normal here refers to the display when the sun shines) It's 50-80 degrees). If this is normal and hot water does not come out, but cold water comes out, this proves that there is no problem with the temperature sensor. This may be due to damage. water mixer or water leak in the pipe;
Second: if the mixer opens the hot water tap and cold water does not come out, check if the water tank is empty, the water outlet is blocked, etc.;
Third: If the temperature display on the instrument is abnormal, the temperature probe may also have problems;
Fourth: Additionally, the vacuum tube itself may not absorb heat or rewater servo is not isolated;
Fifth: If the water tank is empty, check the instrument and whether the solenoid valve is defective, resulting in no water supply and a lack of hot water. .
Detailed information:
The solar water heater is a heating device that converts solar energy into thermal energy Device that heats 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 panel solar water heaters based on their structural shapes. Evacuated tube solar water heaters are mainly used, accounting for 95% of the domestic market share.
The domestic vacuum tube solar water heater is composed of a collector tube,It consists of water storage tanks, supportrts and other related parts. The conversion of solar energy into thermal energy mainly relies on evacuated collector tubes. The vacuum collector tube uses the principle of hot water rising and cold water falling to cause water microcirculation. obtain the necessary hot water.
Reference documents:
Solar water heater-Baidu Encyclopedia