LRQB Air-Cooled Solar Brushless Surface Pump

The naming convention for this model typically follows the Chinese Pinyin abbreviation logic used in the water pump industry:
L: Vertical or Lightweight (aluminum alloy/plastic material).
R: Hot Water or Vortex.
Q: Submersible/Self-priming (here mostly referring to self-priming or shallow water pumping).
B: Brushless DC.

Core Positioning:
It is a brushless DC-driven vortex (or turbine) booster pump. Compared to ordinary centrifugal pumps, it provides a higher head (pressure) at the same volume, making it ideal for scenarios requiring "pumping water over long distances" or "pumping water upstairs."
Core Working Principle: Vortex Boosting + Solar Power
The LRQB series combines the high-head characteristics of a vortex pump with the high efficiency of a brushless DC motor:
Power Source: Uses a permanent magnet brushless DC motor (BLDC). It replaces traditional carbon brushes with an electronic commutator and is directly driven by DC power from solar panels.
Vortex Pressure Boosting: After the water flows into the pump body, it is driven by the high-speed rotating impeller, forming a longitudinal vortex in the flow channel. This "stirring" motion gives the water extremely high speed and pressure when it leaves the impeller.
High-Efficiency Conversion: Due to the absence of carbon brush friction loss and the suitability of the vortex structure for high-speed operation, it can utilize solar power more efficiently.
Core Features: High Pressure, High Temperature Resistance, Long Lifespan

Feature Detailed Description
Ultra-High Head (High Pressure) The biggest advantage. Compared to ordinary centrifugal pumps of the same power, the vortex structure can generate higher pressure. For example, a compact LRQB pump can easily reach a head of 30 meters or even higher, suitable for long-distance transportation.
Brushless DC (Maintenance-Free) The brushless design means no wear, no sparks, and a long lifespan (usually thousands of hours). It is very durable and can adapt to fluctuations in solar voltage.
High-Temperature Resistance Design  The "R" in the model often indicates a certain degree of heat resistance. Its seals and coils usually use high-temperature resistant materials, and some models can withstand hot water at 80℃-100℃, suitable for solar water heater circulation or high-temperature environments.
Strong Self-Priming Capability: Most LRQB series pumps have excellent self-priming capabilities (self-priming height up to 5-8 meters), allowing them to be installed directly on the ground and draw water from low-lying pools.

Typical Application Scenarios:
The LRQB series is an ideal choice for household water supply, small-scale irrigation, and special circulation applications:
Household Solar Water Supply:
Installed in the courtyard or on the roof, it uses solar energy to pump water from the cellar or pool to the rooftop water tank, or directly pressurizes water for household use.
Agricultural/Horticultural Sprinkler Irrigation:
Used for micro-sprinkler irrigation, atomized cooling, or long-distance watering requiring high pressure. Its high pressure ensures good atomization effect of the sprinkler heads.
Hot Water Circulation and Solar Companion:
Due to its high-temperature resistance, it is often used as a circulation pump for solar water heaters or for pumping hot water in high-temperature environments.
Industrial Cleaning and Water Treatment:
Used in applications requiring high pressure, such as cleaning small equipment and water circulation filtration.

Selection and Usage Suggestions
Mainly for Clean Water:
The flow channel of the vortex pump is relatively narrow, so it is not recommended for dirty water containing a large amount of sediment or particles, otherwise it is easy to clog the flow channel or wear the impeller.
Pay Attention to Voltage Matching:
Please confirm that your solar panel voltage (such as 12V, 24V, 48V) matches the rated voltage of the pump. The LRQB series usually supports wide voltage startup, but the highest efficiency is achieved at the rated voltage.
Installation Location:
Although it is called a "surface pump," if high environmental noise requirements exist, it can be submerged in water (cable sealing must be confirmed). Water cooling can further reduce motor noise; if placed on the ground, rain and sun protection measures should be taken.

The LRQB series is the "high-pressure expert" among solar water pumps. If you need to pump water to very high floors, or require a powerful spray effect, and also want maintenance-free equipment with a long lifespan, then the LRQB series (vortex type) has advantages over ordinary centrifugal water pumps (such as LSQB).