Drainage Pump Suction Pipe Concave Surface Residual Water
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Solution Overview
Problem
Existing drainage pumps are unable to suction up all the drain water from a drain pan, leaving a residual amount that can lead to slime formation due to the gap required between the suction port and the drain pan.
Innovation Solution
The drainage pump incorporates a cylindrical suction pipe with a downward-facing suction port and an annular concave surface around the suction port, positioned at the lower end of the suction pipe, which increases the surface tension of the drain water, allowing it to be raised higher and reducing the residual water in the pan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gap is left between the suction port and the drain pan to prevent contact, then the suction port can be positioned higher, but the drainage pump cannot suction up all the drain water leaving residue in the pan
Solution Approach 1:
The invention introduces a concave surface (curved surface) at the lower end of the suction pipe, replacing a flat surface. This concave surface increases the surface tension effect on the drain water, allowing the water to be raised higher along the curved surface and enabling the suction port to draw out more water from the drain pan, thereby reducing residual water while maintaining the gap.
2Quantity of substance
If the suction port is positioned closer to the drain pan to improve drainage, then more water can be suctioned up, but the gap must be maintained to prevent contact and contamination
Solution Approach 1:
The concave surface at the lower end of the suction pipe creates enhanced surface tension effects that allow water to climb higher along the curved surface. This enables the suction port to effectively reach lower into the drain pan and suction up more water while the physical gap between the suction port and drain pan is maintained, preventing contamination.
3Device complexity
If the suction pipe has a standard cylindrical shape, then the structure is simple, but the surface tension effect is insufficient to raise drain water to the suction port level
Solution Approach 1:
The invention modifies the standard cylindrical suction pipe by adding a concave surface at the lower end. This curved surface configuration enhances the surface tension effect on the drain water, allowing it to be raised higher along the curve. The modification is minimal and maintains the overall simple cylindrical structure while significantly improving the surface tension effect.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively lowers the water surface position in the drain pan, reducing the amount of residual drain water and preventing slime formation, by utilizing the increased surface tension to raise the water level and facilitate more complete suction.
Implementation Method 1
surface tension raises drain water from its water surface to the lower end of the suction pipe
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
[Object] To provide a drainage pump capable of reducing the amount of drain water remaining in a drain pan. [Solution] A drainage pump (1) includes a housing (10), an impeller (20) housed in the housing (10), and a motor (30) with a drive shaft (32) connected to the impeller (20). The housing (10) includes a suction pipe (12) in a cylindrical shape extending in an up-and-down direction. A suction port (12a) facing downward and a concave surface (12b) in an annular shape around the suction port (12a) are disposed at a lower end (12c) of the suction pipe (12).