The disadvantages of micro-pumps mainly include the following aspects:
1. Restrictions on operating conditions
Can not run without water for a long time: the micro pump is easy to burn in the state of water shortage, mainly because the pump in idling or dry rotation, the motor and mechanical parts will be damaged by lack of lubrication and cooling.
Insufficient self-priming capacity: some micro-pumps do not have self-priming capacity and must be submerged or installed below the liquid level to work normally, which limits their use scenarios.
Second, performance and efficiency
Limited output pressure: The output pressure (head) of the micro-submersible pump is usually not high, so it is more suitable for large flow and low head occasions.
Noise problems: Although some micro-pumps such as DC brushless pumps perform well in terms of silence, there are still some products with large noise problems, especially at high speed.
Maintenance and cost
High maintenance costs: For some types of micro-pumps, such as brushless DC pumps, maintenance costs may be high due to their complex construction. In addition, in the event of a failure, professional maintenance may be required.
Higher cost: Compared with some traditional pumps, the manufacturing cost of micro pumps is higher, which also leads to its relatively high selling price.
4. Other disadvantages
Easy to wear: For micro-pumps that use carbon brushes for reversing, the carbon brushes will wear with the increase of use time, resulting in increased sound or even failure.
Resonance problem: In some cases, the motor vibration frequency of the micro-pump may be the same or close to the vibration frequency of the frame or surrounding plastic parts, resulting in the occurrence of resonance phenomenon.