Dishwasher Water Supply Timing to Prevent Siphon Drainage
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Solution Overview
Problem
In dishwashers, the continuous draining of washing water due to inertial operation of the drain pump and siphon action leads to insufficient water supply, reducing washing efficiency and causing excessive load on the pump and heater, potentially damaging components.
Innovation Solution
A control device is implemented to stop the supply of washing water for a designated time after the drain operation is finished, using a water level sensor to ensure complete drainage and prevent siphon action, thereby maintaining optimal water levels and reducing operational stress on the dishwasher components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drain pump operates continuously to drain washing water, then the drainage efficiency is improved, but the washing water becomes insufficient and washing efficiency is lowered
Solution Approach 1:
The control device stops the water supply device before stopping the drain pump, and maintains the water supply channel closed for a designated time after drain pump operation ends. This preliminary anti-action prevents the siphon action and inertial operation from causing excessive drainage, thereby maintaining adequate washing water quantity while preserving drainage efficiency.
2Productivity
If the drain pump operates continuously to drain washing water, then the drainage efficiency is improved, but the pump and heater are damaged due to excessive load
Solution Approach 1:
By closing the water supply channel before the drain pump stops operating and maintaining it closed for a designated time afterward, the system prevents the siphon action and inertial operation that would otherwise cause excessive drainage. This protects the pump and heater from excessive load and potential damage, thereby improving component reliability while maintaining drainage efficiency.
3Ease of operation
If the water supply channel remains open during drain pump operation, then the water supply is continuous, but the washing water is excessively drained due to inertial operation and siphon action
Solution Approach 1:
The control device stops the water supply device before the drain pump operation ends and maintains the water supply channel closed for a designated time afterward. This preliminary anti-action prevents the siphon action and inertial operation from causing excessive drainage, thereby maintaining adequate washing water quantity while ensuring water supply continuity during the drain operation.
4Quantity of substance
If the water supply is stopped completely after drainage, then the water insufficiency is prevented, but the cycle time is extended
Solution Approach 1:
Instead of stopping the water supply for an extended period, the control device stops the water supply device before the drain pump operation ends and maintains the water supply channel closed for only a designated time afterward. This partial action is sufficient to prevent excessive drainage while minimizing the impact on cycle time, thereby balancing washing water quantity maintenance with cycle time efficiency.
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 solution improves the efficiency of washing water supply and drainage, preventing water insufficiency and excessive load on the dishwasher components, while reducing noise and extending the overall cycle time.
Implementation Method 1
a siphon action generated between the sump and the drain channel
Implementation Method 2
the washing water supplied to the sump is drained through the drain channel due to inertial operation of the drain pump
Data Source
AI summary
Disclosed is a dishwasher, which prevents a washing cycle from being carried out in an insufficient state of washing water caused by the continuous discharge of the washing water due to a siphon action, and a method of controlling the dishwasher. The method includes draining washing water from the dishwasher; supplying the washing water to the inside of the dishwasher; and temporarily stopping the supply of the washing water for a designated time between the drain of the washing water and the supply of the washing water.