Detergent dispensing device for a dishwasher
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Solution Overview
Problem
Existing detergent dispensing systems in dishwashers face issues with inexact detergent release location, slow dissolution of detergent, and adherence of detergent tablets to the dispenser, leading to incomplete dissolving and operational inefficiencies.
Innovation Solution
A detergent dispensing device with a container having at least two inlets for pressurized fluid to be applied from different directions, enhancing dissolution rate and featuring an open top section for easy detergent placement and exit, along with a cover for controlled fluid application during prewash or rinse programs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If detergent is compacted into tablet form for efficient storage and dispensing, then storage efficiency is improved, but dissolution rate deteriorates (dissolves slowly)
Solution Approach 1:
The container is divided into multiple compartments with separate inlets for different types of detergent (washing detergent, rinse aid, salt). Each compartment can be independently activated, allowing segmented dissolution rather than requiring the entire tablet to dissolve at once. This segmentation enables faster overall dissolution while maintaining compact storage.
Solution Approach 2:
Multiple inlets are positioned at different locations and orientations around the container (front, back, sides), creating multi-directional fluid flow through the detergent compact. This transforms the dissolution process from a single-direction surface erosion to a three-dimensional penetration pattern, dramatically increasing the effective surface area and dissolution rate.
2Ease of operation
If a control system with microprocessor and solenoid is used to control lid opening and closing, then dispensing control is improved, but device complexity deteriorates
Solution Approach 1:
The system uses the dishwasher's existing water circulation system to automatically activate detergent compartments. Water flow through the container triggers dissolution without requiring separate control mechanisms. The container self-regulates dispensing based on water flow patterns, eliminating the need for microprocessors and solenoids.
Solution Approach 2:
The container serves multiple functions: storage, dissolution control, and dispensing. The same water circulation system that performs washing also activates detergent dissolution, eliminating the need for dedicated control systems. This multi-functionality reduces overall device complexity while maintaining effective control.
3Reliability
If detergent tablet adheres to the dispenser during operation, then dispensing reliability is improved (stays in place), but dissolution completeness deteriorates (does not fall into compartment)
Solution Approach 1:
The container design allows the detergent compact to transition from a stationary adhered state to a mobile dissolving state. Water flow dynamically activates dissolution, and the compact gradually breaks down and releases detergent into the washing compartment. This dynamic process ensures complete dissolution rather than partial adhesion.
Solution Approach 2:
Water acts as an intermediary medium between the detergent compact and the washing compartment. Instead of the compact directly falling or adhering, water facilitates gradual dissolution and transport of detergent components, ensuring complete dissolution while maintaining reliable dispensing throughout the wash cycle.
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
The solution significantly increases detergent dissolution speed, prevents tablet adherence and falling, and allows for easy user access, ensuring efficient detergent distribution during washing cycles.
Implementation Method 1
pressurized fluid entering the inlets are applied onto the detergent from different directions
Implementation Method 2
the detergent dissolved by the pressurized fluid exits the container
Data Source
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AI summary
The present invention relates to a detergent dispensing device for a dishwasher. The detergent dispensing device (100) for a dishwasher (1) comprises a container (101) for accommodating detergent (110), at least two inlets (102, 103) to the container, which inlets are arranged such that pressurized fluid (108, 109) entering the inlets are applied onto the detergent from different directions, and an outlet ( 104) via which the detergent dissolved by the pressurized fluid exits the container.