Dishwasher Bypass Pipe for Sump Pressure Relief
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Solution Overview
Problem
Conventional dish washing machines experience a sudden increase in water pressure in the filth chamber due to clogging of the mesh filter by accumulated filth, leading to unintended drainage of wash water.
Innovation Solution
Incorporation of a bypass pipe system that diverts excess wash water from the sump to the guide pipe when pressure exceeds a predetermined level, utilizing a check valve to open and close the bypass pipe based on pressure conditions, ensuring smooth water circulation and preventing malfunction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mesh filter is used to separate food waste from wash water in the filth chamber, then the wash water circulation is improved, but the water pressure in the filth chamber abruptly increases when the mesh filter is clogged
Solution Approach 1:
A bypass pipe is introduced as an intermediary component that provides an alternative flow path when the mesh filter becomes clogged. The bypass pipe includes a check valve that acts as a pressure-activated mediator, remaining closed during normal operation but automatically opening when pressure exceeds a predetermined threshold, thereby relieving excessive pressure in the filth chamber without compromising the filtration function.
Solution Approach 2:
The system dynamically changes the flow resistance parameter by using a check valve that transitions from a closed state (during normal operation) to an open state (when pressure exceeds the threshold). This parameter change allows the system to maintain filtration efficiency under normal conditions while preventing pressure buildup when the filter becomes clogged.
2Reliability
If the mesh filter accumulates filth in the filth chamber, then the filtration function is improved, but the water pressure increases causing unintended drainage
Solution Approach 1:
The bypass pipe system serves as a mediator between the filth chamber and the drainage system. When filth accumulation causes excessive pressure, the check valve automatically opens the bypass pipe, providing a controlled relief path that prevents unintended drainage through the clogged filter while maintaining the filtration function.
Solution Approach 2:
The bypass pipe with check valve provides preliminary protection against the harmful effect of excessive pressure by creating a pressure relief mechanism before the pressure can cause unintended drainage. This preventive measure counteracts the potential harm before it occurs.
3Reliability
If a bypass pipe with check valve is added to prevent excessive pressure, then the system reliability is improved, but the device complexity increases
Solution Approach 1:
The check valve in the bypass pipe system is designed to operate automatically based on pressure differential without requiring external control or intervention. The valve self-regulates by opening when pressure exceeds the threshold and closing when pressure normalizes, providing a simple self-service mechanism that enhances reliability without requiring complex control systems.
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
Prevents abrupt increases in water pressure in the filth chamber, thereby preventing unintended drainage and ensuring continuous and efficient operation of the dish washing machine.
Implementation Method 1
When the pressure of the wash water introduced into the bypass pipe exceeds a predetermined pressure level, the bypass pipe is opened to bypass the introduced wash water to the guide pipe
Implementation Method 2
a check valve disposed in the bypass pipe to open and close the bypass pipe based on the pressure of the wash water introduced into the bypass pipe
Data Source
AI summary
Disclosed herein is a dish washing machine that is capable of preventing the unintentional drainage of some wash water by the increase of the water pressure in a sump due to the excessive accumulation of filth in the sump. The dish washing machine includes a washing tub, at least one injection nozzle disposed in the washing tub, a sump disposed in the washing tub to forward wash water to the at least one injection nozzle, a guide pipe connected between the sump and the at least one injection nozzle, and a bypass pipe, diverging from a portion of the guide pipe, connected to the sump to bypass the wash water in the sump to the guide pipe.