Dishwasher Drain Pump Mounting Angle for Low Residual Water
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Solution Overview
Problem
Existing dishwashers face challenges in mounting and replacing the drain pump, which results in residual water, vibration, and noise due to direct coupling without vibration damping means.
Innovation Solution
The drain pump is mounted tilted upward at a predetermined angle with an insulating material connecting it to the sump assembly, and a check valve is used to prevent reverse water flow, minimizing interference and vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drain pump is directly coupled to the sump assembly, then the drainage function is achieved, but vibration and noise are transmitted directly to the sump assembly
Solution Approach 1:
The patent introduces a vibration damping member as an intermediary component between the drain pump and the sump assembly. This mediator absorbs and dampens vibrations while blocking noise transmission, allowing the drainage function to operate effectively without transmitting harmful vibrations and noise to the sump assembly.
Solution Approach 2:
The vibration damping member is pre-installed on the sump assembly before the drain pump is mounted. This beforehand cushioning prepares the mounting surface with vibration-absorbing properties, ensuring that when the drain pump operates, vibrations are immediately dampened and noise is blocked from transmitting to the sump assembly.
2Device complexity
If the drain pump is mounted horizontally, then the structure is simple, but residual water remains in the pump after drainage
Solution Approach 1:
The patent changes the drain pump mounting from a horizontal symmetric configuration to a tilted asymmetric configuration. The drain pump is mounted at an angle of 5-15 degrees relative to the horizontal plane, with the discharge end higher than the suction end. This asymmetric positioning uses gravity to drain residual water completely from the pump, eliminating the residual water problem while maintaining structural simplicity.
3Loss of substance
If the drain pump is mounted tilted upward, then residual water is minimized, but the mounting structure becomes more complex
Solution Approach 1:
The drain pump is mounted in a tilted asymmetric position at 5-15 degrees relative to the horizontal plane, with the discharge end elevated higher than the suction end. This asymmetric angular positioning utilizes gravity to ensure complete drainage of residual water from the pump, achieving minimal residual water loss while the simple angular adjustment keeps the mounting structure relatively uncomplicated.
4Ease of repair
If the drain pump is replaced by turning the dish washer upside down, then component replacement is possible, but the operation becomes inconvenient and time-consuming
Solution Approach 1:
The patent segments the drain pump mounting from the sump assembly by using a separate vibration damping member and simplified mounting structure. This segmentation allows the drain pump to be easily detached and replaced without requiring the entire dish washer to be inverted, making the replacement operation convenient and time-efficient while maintaining ease of repair.
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 reduces residual water, minimizes vibration and noise, and allows for easier mounting and dismounting of the drain pump while maintaining efficient drainage and filtration.
Implementation Method 1
the drain pump assembly and the sump assembly are connected with an insulating material to each other
Implementation Method 2
a check valve member placed in the chamber outlet for preventing residual water from flowing in a reverse direction from the drain pump assembly
Data Source
AI summary
The present invention relates to a dish washer in which a structure for mounting a drain pump is improved for minimizing residual water, vibration and noise. The dish washer includes a cabinet which forms an exterior of the dish washer, a tub in the cabinet to form a space for washing the dishes, a sump assembly at a lower portion of the cabinet, the sump assembly having a drain chamber for holding washing water to be drained, and a drain pump assembly coupled to a lower side of an outside of the sump assembly so as to be in communication with one side of the drain chamber for draining the washing water from the drain chamber by pumping, wherein the drain pump assembly is mounted tilted upward at a predetermined angle from an inside bottom surface of the cabinet.