Hand Cleaner Dispenser With Sequential Spray and Liquid Stream
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Solution Overview
Problem
Conventional hand cleaning soap dispensers typically dispense liquid hand cleaner only in a single time interval and inadequately distribute the cleaning liquid over the fingers and fingertips, requiring users to manually rub the liquid onto their hands, which is inefficient for proper cleaning and disinfecting, especially in medical and food industries.
Innovation Solution
A hand cleaner dispenser that operates in a cycle with two time intervals, dispensing liquid as a spray during the first interval directed towards the fingers and fingertips and as a liquid stream during the second interval onto the palm, utilizing a piston pump mechanism with selective diversion of liquid to achieve effective hand cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid hand cleaner is dispensed as a downward stream onto the palm only, then the dispensing mechanism is simple, but the cleaning liquid is not adequately distributed over the fingers and fingertips
Solution Approach 1:
The dispensing system is segmented into multiple outlets: a first outlet for dispensing liquid stream onto the palm and a second outlet for dispensing spray onto fingers and fingertips. This segmentation allows each outlet to serve a specific function, ensuring comprehensive coverage of all hand surfaces without requiring complex manual manipulation by the user.
Solution Approach 2:
The system employs periodic action by controlling the timing of liquid discharge from different outlets. The microprocessor controller activates the first outlet to dispense liquid stream during a first time interval, then activates the second outlet to dispense spray during a second time interval. This sequential periodic operation ensures both palm and fingertips receive adequate cleaning liquid without requiring simultaneous complex dispensing mechanisms.
2Productivity
If liquid hand cleaner is dispensed in a single time interval only, then the dispensing cycle is short, but the liquid is not distributed to both palm and fingers effectively
Solution Approach 1:
The dispensing system uses periodic action by dividing the dispensing cycle into distinct time intervals. During a first time interval, the first outlet dispenses liquid stream onto the palm. During a second time interval, the second outlet dispenses spray onto fingers and fingertips. This periodic sequencing ensures comprehensive cleaning coverage while maintaining efficient dispensing speed through automated timing control.
Solution Approach 2:
The system applies preliminary action by first dispensing liquid stream onto the palm to prepare the main hand surface, then subsequently dispensing spray onto the fingers and fingertips. This sequential preliminary action ensures that each area of the hand receives appropriate liquid application in an optimized sequence, improving overall cleaning effectiveness without extending the total cycle time significantly.
3Device complexity
If user manually rubs cleaning liquid from palm to fingers, then the dispensing mechanism is simple, but the distribution to fingertips is inadequate
Solution Approach 1:
The dispensing mechanism is segmented into multiple outlets positioned to target different hand areas. The first outlet directs liquid stream onto the palm, while the second outlet directs spray onto the fingers and fingertips. This segmentation eliminates the need for users to manually rub liquid from palm to fingers, as the system automatically distributes liquid to all necessary areas including the often-missed fingertips.
Solution Approach 2:
The system implements self-service by automatically distributing cleaning liquid to all hand surfaces without requiring user manipulation. The microprocessor controller manages the sequential activation of different outlets, ensuring that liquid is delivered directly to both the palm and fingers/fingertips. This self-service approach improves cleaning completeness while maintaining relatively simple device architecture through automated control.
Data Source
AI summary
Operating a hand cleaner dispenser for dispensing a cleaning liquid from a reservoir onto a person's hands in a cycle of operation wherein, during a first time interval during the cycle dispensing the liquid onto the hand as a spray, and during a second time interval during the cycle dispensing the liquid onto the hand as a liquid stream.