Annular Hand Dryer Airflow Design Without Water Collection Trough
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Solution Overview
Problem
Conventional hand dryers often result in water droplets being blown to the floor, creating a slippery and untidy environment, and water collection troughs can form watermarks, breed bacteria, and require regular maintenance.
Innovation Solution
A watermark-free hand dryer design featuring a main body that generates high-pressure airflow through an annular air discharge portion with nozzles, directing water drops to a water-absorbing portion made of ceramics or porous materials, eliminating the need for a water collection trough.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a water collection trough is used to collect water drops, then water drops can be gathered and disposed, but watermarks form, bacteria breed, and regular maintenance is required
Solution Approach 1:
The invention removes the water collection trough entirely from the system. Instead of collecting water drops in a trough that requires maintenance and causes watermarks, the design extracts this problematic component and replaces it with a water-absorbing material that directly addresses the water drop issue without creating secondary problems.
Solution Approach 2:
The invention employs a water-absorbing porous material to manage water drops. This porous material absorbs water drops directly, preventing them from reaching the floor while avoiding the watermark and bacterial growth issues associated with water collection troughs.
2Ease of operation
If air outlet ejects air downwards to dry hands, then hands can be dried, but water drops are blown to floor creating slippery hazard
Solution Approach 1:
The invention applies local quality by positioning the water-absorbing porous material specifically at the air discharge side where water drops are most likely to be blown. This localized placement allows the material to absorb water drops at the critical point without interfering with the overall hand drying function.
Solution Approach 2:
The water-absorbing porous material acts as an intermediary between the air flow and the floor. It intercepts water drops that would otherwise be blown to the floor by the downward air flow, absorbing them before they can create a slippery hazard.
3Object-generated harmful factors
If water absorbing means is placed in water collection trough, then water can be absorbed without breeding bacteria, but water absorbing means must be replaced regularly
Solution Approach 1:
The invention extracts the water-absorbing material from the water collection trough context entirely. By removing the trough, the absorbing material becomes an integral part of the air discharge structure itself, eliminating the need for regular replacement while maintaining the benefit of preventing bacterial growth.
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
Effectively manages water drops without a collection trough, preventing watermarks and bacterial growth, and eliminates the need for regular trough maintenance, ensuring a cleaner and safer drying experience.
Implementation Method 1
a water absorbing portion (30) located on the main body (10) and relative to the air discharge side (24) to receive the high pressure airflow output from the nozzle (25)
Implementation Method 2
The water absorbing portion (30) is made of materials selected from the group consisting of water absorbing ceramics and porous materials
Data Source
AI summary
A watermark-free hand dryer includes a main body, an annular air discharge portion and a water absorbing portion. The main body generates high pressure airflow. The annular air discharge portion is connected to the main body and includes at least one extending section extended from the main body and a connecting section connected to the extending section. The extending section and connecting section surround to form an annular hand drying passage to receive user's hands. The annular air discharge portion further has at least one nozzle on an air discharge surface communicating with the annular air discharge portion. The nozzle forms an air discharge angle against the air discharge surface to output the high pressure airflow towards an air discharge side. The water absorbing portion is located on the main body and relative to the air discharge side to receive the high pressure airflow output from the nozzle.