When it comes to solar energy, a lot of people will think about the solar water heaters, and some even know solar photovoltaic systems. But it seems that the solar system that everyone is able to use can only be used in the house. In fact, it is not. For example, solar submersible pumps can not only supply domestic water, but also automatically water and irrigate fields, flowers and plants. It is especially practical in drought years. If it is fully promoted, it can benefit the country and the people.
1. The working principle of solar submersible pump
The working principle of solar submersible pump is very simple. Under light conditions, solar panels absorb light energy and convert it into electrical energy. DC power is converted into AC electrical energy through an inverter, and then the submersible pump is turned on through the submersible pump control switch to pump up the water for storage or use directly. Not only that, you can also add a battery to the system to store part of the electric energy converted during the day, so that it can continue to pump water even at night or on a cloudy day, and it can be used as a temporary emergency at least.
Moreover, the combination of solar submersible pumps and indoor power grids can better supply household water. During the day, light is used to generate electricity to pump water and batteries are used at night. If there is no electricity, there are still household circuits. The significance of solar submersible pump technology for agricultural irrigation far exceeds the importance of supplying domestic water.
2. The classification of solar submersible pumps
(1) Brushed solar submersible pump: When the water pump is working, the coil and commutator rotate, while the magnet and carbon brush do not rotate. The alternating change of the direction of the coil current is accomplished with the commutator and brush rotating by the motor. As long as the motor rotates, the carbon brush will cause wear. When the computer water pump runs to a certain extent, the wear gap of carbon brush becomes larger, and the sound will also increase. After hundreds of hours of continuous operation, the carbon brush can no longer play a role in reversing.
(2) Brushless DC solar submersible pump: The motor-type brushless solar submersible pump is composed of a brushless DC motor and an impeller. The brushless DC motor of the brushless DC solar submersible pump has been standardized, with low cost and high efficiency.
(3) Brushless DC magnetic drive solar submersible pump: Brushless DC pump adopts electronic component reversing, and there is no need to use carbon brush reversing. Use wear-resistant ceramic shaft and ceramic shaft sleeve, and shaft sleeve is integrated with the magnet as a whole through injection molding. Therefore, wear is avoided, and the service life of brushless DC magnetic pump is prolonged. The brushless DC magnetic drive solar submersible pump has long service life, low noise (below 35dB), high temperature resistance, and can be used for hot water circulation. The stator and circuit board of the motor are encapsulated with epoxy resin and completely isolated from the rotor, which can be installed underwater and is waterproof. The shaft of the water pump adopts the ceramic shaft, which has good shock resistance.
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