Detergent Metering Interface for Multi-Insert Dishwasher Dosing
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Solution Overview
Problem
Conventional dishwashers require manual loading and metering of detergents, leading to inconvenience, errors, and limitations in detergent type and manufacturer choice, with existing automatic dispensing systems either causing pollution or restricting detergent form.
Innovation Solution
A metering system with an interface device that accommodates different storage inserts for various detergent forms and concentrations, allowing precise control and combination of detergent components, and featuring standardized connections for liquid and solid substances, along with a data reader for automatic data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual loading and metering of detergents is used, then the appliance can accept any detergent form, but the operation becomes inconvenient and error-prone
Solution Approach 1:
The system uses self-contained storage inserts that are pre-filled with detergent at the factory. The inserts automatically dispense the correct amount of detergent through integrated metering mechanisms, eliminating the need for user intervention in measuring and loading detergent. This resolves the contradiction by making the system both easy to operate (simple insert replacement) and reliable (factory-prepared precise dosing).
Solution Approach 2:
The detergent is pre-measured and pre-packaged in storage inserts before the appliance is used. The metering is performed in advance during manufacturing rather than at the point of use. This eliminates user error in metering while maintaining ease of operation through simple insert replacement. The system performs the complex metering action beforehand, leaving only the simple action of replacing the insert to the user.
2Quantity of substance
If a large-volume built-in storage container is used, then detergent for several washing processes can be stored, but the user is tied to liquid detergent and refilling is still required
Solution Approach 1:
The system uses disposable or replaceable storage inserts that are pre-filled with detergent. Instead of refilling a large container, the user simply replaces the entire insert when it is empty. This eliminates the messy refilling operation while maintaining the ability to store detergent for multiple washes. The insert is designed as a complete, self-contained unit that is discarded or replaced rather than refilled.
Solution Approach 2:
The refilling function is extracted from the system by using pre-filled, replaceable inserts. The complex operation of transferring detergent from external containers into the appliance is removed entirely. The storage insert is extracted as a complete, self-contained unit that requires no user intervention for refilling, resolving the contradiction between storage capacity and ease of operation.
3Ease of operation
If exchangeable cassettes with transfer devices are used, then refilling is eliminated, but the dispensing system must be adapted with drive devices, restricting manufacturer choice
Solution Approach 1:
The transfer device and drive mechanism are extracted from the appliance and integrated into the storage insert itself. The insert becomes a self-contained unit with its own detergent delivery mechanism, eliminating the need for complex drive devices in the appliance. This resolves the contradiction by simplifying the appliance while maintaining the benefits of automatic dispensing and eliminating refilling.
Solution Approach 2:
The storage insert is designed as a universal component that can work with different appliance models and manufacturers. By integrating the transfer mechanism into the insert rather than requiring appliance-specific drive devices, the system achieves compatibility across different manufacturers. This resolves the contradiction between eliminating refilling and reducing device complexity/restricting manufacturer choice.
4Adaptability or versatility
If standardized connections are used, then compatibility with different storage inserts is improved, but the interface device becomes more complex
Solution Approach 1:
The interface device uses standardized connections that can accommodate different types of storage inserts (liquid, powder, capsule-based). The same basic connection design works universally across different detergent forms and manufacturers. This resolves the contradiction by achieving high adaptability through standardization while keeping the interface device design relatively simple and reusable.
Solution Approach 2:
The system accommodates different detergent types (liquid, powder, capsules) through parameter changes in the storage insert design rather than requiring different interface device hardware. The standardized connection handles various detergent forms by adjusting operational parameters rather than structural complexity. This resolves the contradiction between versatility and interface device complexity.
Data Source
AI summary
A domestic appliance having a metering device into which a storage insert containing additive substances can be inserted and by means of which additive substances can be dispensed in metered fashion during a number of cleaning operations. The metering device is distinguished in that it has an interface device for interacting with different storage inserts.