Dual-Chamber Dishwasher Dispenser for Timed Detergent Release
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Solution Overview
Problem
Existing dishwasher systems lack an efficient mechanism for timely and selective release of additional detergent during specific stages of the washing operation, particularly when multiple spray units are activated, leading to untimely dispensing of detergent and inadequate detergent concentration in intensified wash zones.
Innovation Solution
A dual-chamber auxiliary dispenser assembly with a calibrated drain hole is integrated into the dishwasher, allowing washing fluid to flow into a prefill chamber and only overflow into an additive chamber when the flow rate exceeds a certain threshold, ensuring a timed release of detergent into the washing chamber during intensified wash cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an auxiliary dispenser is provided to increase detergent concentration in intensified wash zones, then cleaning effectiveness for heavily soiled kitchenware is improved, but detergent may be dispensed at incorrect times when spray units are activated multiple times during the washing operation
Solution Approach 1:
The system performs preliminary action by filling the prefill chamber with washing fluid before the actual detergent dispensing phase. This preliminary fluid accumulation ensures that when the additive chamber is activated, the detergent is immediately available for timed dispensing into the intensified wash zone, preventing premature or incorrect timing of detergent release.
Solution Approach 2:
The dispenser is segmented into two distinct chambers: a prefill chamber for holding washing fluid and an additive chamber for holding detergent. This segmentation allows independent control of fluid preparation and detergent release, enabling precise timing control where detergent is only dispensed after the prefill chamber is properly filled and during the correct phase of the washing cycle.
2Quantity of substance
If detergent is dispensed continuously whenever washing fluid flows to the spray unit, then detergent concentration is maximized, but detergent is wasted during phases when additional detergent is not needed
Solution Approach 1:
The system employs self-service mechanisms where the prefill chamber automatically fills from the washing fluid flow and the detergent dispensing is automatically triggered based on the filling status and timing. The calibrated drain hole and overflow mechanism provide self-regulating control, ensuring detergent is only dispensed when and where needed without continuous addition, thereby preventing detergent waste during phases when additional detergent is not required.
3Device complexity
If a simple single-chamber dispenser is used, then device complexity is reduced, but the ability to control timed release of detergent during specific washing stages is insufficient
Solution Approach 1:
The dispenser is divided into two chambers with distinct functions: prefill chamber for fluid accumulation and additive chamber for detergent storage. This segmentation enables automated timed release control because each chamber can be independently managed based on washing cycle phase, allowing the system to automatically determine when detergent should be released without requiring complex external control mechanisms.
Solution Approach 2:
The prefill chamber serves as an intermediary between the washing fluid supply and the additive chamber. It mediates the timing control by first filling with washing fluid and then allowing detergent to be introduced at the appropriate time, creating a buffer that enables precise timed release control while keeping the overall device structure relatively simple.
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 provides a convenient and effective method for increasing detergent concentration in the washing fluid, ensuring enhanced cleaning of heavily soiled kitchenware by controlling the release of additional detergent only during specific stages of the washing operation, preventing premature dispensing and optimizing detergent distribution.
Implementation Method 1
The prefill chamber is separated from the additive chamber by a partition, while also including a calibrated drain hole
Implementation Method 2
If the flow of washing fluid into the prefill chamber is greater than a certain duration and/or flow rate, the washing fluid will be caused to overflow from the prefill chamber into the additive chamber
Data Source
AI summary
A dishwasher includes an auxiliary dispenser assembly used in conjunction with an auxiliary spray unit, preferably to create an intensified wash zone in the washing chamber. The dispenser assembly includes a container partitioned into a prefill chamber and an additive chamber. A washing fluid inlet leads into the prefill chamber, which is also provided with a calibrated drain hole. During at least one stage of a washing operation, a portion of the washing fluid delivered to the auxiliary spray unit is diverted and forced to flow into the prefill chamber, fill the prefill chamber, overflow into the additive chamber and exit the dispenser assembly with additional washing agent. During other stages or between stages, any washing fluid entering the inlet is directed out the drain hole so as to not reach the additive chamber.