Vertical-Axis Dishwasher Impeller Pump With Direct Chamber Inlet
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Solution Overview
Problem
Existing water-bearing household appliances face challenges in designing a compact, space-saving, and integrated water treatment system due to limitations in pump placement and space requirements.
Innovation Solution
The impeller pump is positioned with its axis of rotation vertically or perpendicularly to the appliance's surface, allowing for close proximity to the water treatment room, eliminating the need for intermediate parts and reducing overall height by integrating the pump directly with the water treatment chamber, and incorporating a tubular inlet and outlet for efficient water suction and discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the pump is arranged horizontally or at a distance from the water treatment room, then the pump can be easily connected with intermediate parts, but the overall height and space requirement increase
Solution Approach 1:
The pump is merged with the water treatment room by eliminating intermediate connection parts. The pump chamber is directly integrated into the water treatment room structure, with the pump inlet opening directly into the water treatment space, creating a unified compact assembly that reduces both volume and complexity
Solution Approach 2:
The pump axis of rotation is oriented vertically (perpendicularly to the standing surface) instead of horizontally. This dimensional change allows the pump to be positioned directly below the water treatment room, utilizing vertical space efficiently and enabling direct connection without intermediate horizontal piping
2Length of stationary object
If the impeller pump is positioned close to the water treatment room, then the overall height is reduced, but the inlet distance from the water treatment room increases
Solution Approach 1:
Instead of extending the inlet horizontally from a distant pump position, the solution inverts the approach by positioning the pump vertically below the water treatment room. The inlet opens upward into the water treatment space, utilizing vertical gravity-assisted flow rather than horizontal extension
3Length of stationary object
If the pump chamber is made flat with vertical axis, then the overall height is reduced, but the water suction efficiency may be compromised
Solution Approach 1:
The pump chamber is designed with locally optimized features: the inlet is positioned at the lowest point of the water treatment room and surrounded by a sump area that concentrates water flow. The impeller is positioned to efficiently capture water from this localized high-flow region, maintaining suction efficiency in a compact flat configuration
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
This configuration enables efficient water management, reduces design and assembly complexity, and allows for a larger water treatment space within a smaller footprint, enhancing integration and reducing the overall height of the appliance.
Implementation Method 1
an impeller pump or pump (22) in the water supply... with an impeller or a pump wheel with an axis of rotation in the pump chamber
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A water-carrying household appliance (11) with a water treatment chamber (14) and a water supply (38) to and from the water treatment chamber (14) in the form of a dishwasher comprises an impeller pump (22), the impeller pump (22) having a pump chamber (26), an impeller (28) with a pivot axis (30) in the pump chamber (26), and a drive motor (32) for the impeller. The pivot axis (30) runs vertically or perpendicular to a base of the household appliance (11). The impeller (28) can be located directly on the underside of a drain from the water treatment chamber (14) or only a short distance from it. An inlet (24) is provided on the pump chamber (26) which opens directly onto the drain from the water treatment chamber (14).