A dishwasher comprising a liquid/gel dosing unit
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Solution Overview
Problem
Existing dishwasher dosing units struggle to accurately control the amount of high viscosity liquid or gel detergents, often resulting in excessive detergent transfer and residues on dishes.
Innovation Solution
A dishwasher with a dosing mechanism featuring a crankshaft, piston rod, and dual valves that control the transfer of detergent between a detergent receptacle, a scaling receptacle, and the washing cabin, ensuring precise dosing by alternately opening and closing two openings to prevent accidental transfer and maintain optimal detergent levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high viscosity liquid or gel detergent is used in the dosing unit, then the detergent can be stored and transferred, but the dosing unit cannot control the amount of transferred detergent accurately, resulting in excessive detergent transfer and residues on dishes
Solution Approach 1:
The patent employs a dosing mechanism with a piston rod that moves dynamically between different positions (first position for filling, second position for dosing) to control the transfer of high viscosity detergent. The movable valve responds to pressure changes during piston movement, dynamically opening or closing passages to regulate detergent flow and ensure precise dosing despite the detergent's high viscosity.
Solution Approach 2:
The patent changes the pressure parameter within the dosing unit during operation. When the piston rod moves to the first position, pressure increases to fill the scaling receptacle. When moved to the second position, pressure decreases to enable controlled dispensing. This parameter change allows accurate control of high viscosity detergent transfer.
2Device complexity
If a simple detergent transfer mechanism is used, then the device complexity is reduced, but the ability to control opening and closing of passages and prevent accidental direct transfer from detergent receptacle to washing cabin is compromised
Solution Approach 1:
The patent introduces a scaling receptacle as an intermediary chamber between the detergent receptacle and the washing cabin. Detergent must pass through this intermediate stage, allowing the dosing mechanism to control transfer in two distinct phases (filling and dosing) rather than direct transfer, thereby improving reliability without excessive complexity.
Solution Approach 2:
The movable valve automatically responds to pressure changes generated by the piston rod movement. When pressure increases during filling, the valve closes the dosing passage. When pressure decreases during dosing, the valve opens the passage. This self-regulating mechanism provides reliable control without requiring complex external control systems.
3Productivity
If both openings are open simultaneously for detergent transfer, then the dosing operation is simplified, but detergent may be directly transferred accidentally from the detergent receptacle to the washing cabin, causing excessive detergent use
Solution Approach 1:
The dosing mechanism operates in periodic cycles: the piston rod alternates between the first position (filling the scaling receptacle) and the second position (dosing into the washing cabin). During each cycle, only one passage is open at a time, controlled by the pressure-responsive movable valve. This periodic operation ensures efficient dosing while preventing detergent waste through accidental direct transfer.
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
Enables controlled and accurate delivery of detergent, preventing excessive detergent transfer and residues, even with high viscosity liquids, ensuring optimal washing performance and user convenience.
Implementation Method 1
a spring disposed between the first support member and the second support member... By means of the spring controlling the movement is facilitated
Data Source
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AI summary
The present invention relates to a dishwasher (1) comprising a body (2); a washing cabin (3) disposed on the body (2) and wherein the washing process is performed; a detergent dispenser (4) that is detachably mounted on the body (2) and wherein liquid/gel detergent can be filled; a detergent receptacle (5) that is disposed inside the detergent dispenser (4) and wherein detergent is filled; a scaling receptacle (6) that is disposed next to the detergent receptacle (5) and wherein the detergent to be used in the washing process is transferred from the detergent receptacle (5) and collected; at least one first opening (7) that is arranged between the detergent receptacle (5) and the scaling receptacle (6) and that enables the detergent to be transferred from the detergent receptacle (5) to the scaling receptacle (6); at least one second opening (8) that is arranged between the scaling receptacle (6) and the washing cabin (3) and that enables the detergent to be transferred from the scaling receptacle (6) to the washing cabin (3), and a dosing mechanism (9) that is disposed between the detergent receptacle (5) and the scaling receptacle (6) and that enables the detergent to be transferred from the detergent receptacle (5) towards the washing cabin (3) by controlling opening/closing of the first opening (7) and the second opening (8).