Sanitary Cleaning Device Backflow Prevention Tank Acid Solution Spattering
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Solution Overview
Problem
Conventional sanitary cleaning devices face issues with acid solution spattering and adhesion to peripheral members due to their small tank capacity, leading to potential degradation and inefficiencies in scale removal processes, especially in areas with hard water.
Innovation Solution
A sanitary cleaning device with a solution provision unit featuring a flow-path cross-sectional area expansion towards the solution inlet port, reducing flow speed and impact, and a funnel part for excess acid solution accumulation, along with strategic positioning to minimize overflow and adhesion, is designed to reduce acid solution spattering and adhesion to peripheral members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If acid solution is provided into the tank of the backflow prevention mechanism, then scale removal function is achieved, but spattering of acid solution occurs and adheres to peripheral members
Solution Approach 1:
The solution supply path is designed with an expansion part that increases the flow-path cross-sectional area toward the solution inlet port. This parameter change in the flow path geometry reduces the flow speed of the acid solution, thereby reducing impact and spattering when the solution enters the tank, and preventing adhesion to peripheral members
2Reliability
If the tank capacity is made small for backflow prevention, then backflow prevention function is achieved, but spattering of acid solution is likely to occur
Solution Approach 1:
The expansion part in the solution supply path changes the flow path cross-sectional area parameter, reducing acid solution flow speed and impact energy, thereby preventing spattering even in a small-capacity tank used for backflow prevention
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 effectively reduces acid solution spattering and adhesion to peripheral members, optimizing scale removal efficiency and minimizing unnecessary acid solution consumption and peripheral damage.
Implementation Method 1
The relation of Q = V•A holds among a flow rate (Q), a flow speed (V), and a flow-path cross-sectional area (A). Accordingly, the flow speed (V) decreases as the flow-path cross-sectional area (A) increases when the flow rate (Q) is constant.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A sanitary cleaning device (1) including a nozzle (40), a water supply path (50), a backflow prevention mechanism (90), and a solution provision unit (100). The backflow prevention mechanism includes a tank (91) provided on the water supply path, a water inlet port (92) that is communicated with an upstream water supply path (51) on the water supply path and through which water flows into the tank, a water outlet port (93) that is communicated with a downstream water supply path (52) on the water supply path and through which water in the tank flows out to the downstream water supply path, and an overflow port (94) provided to form an air gap between the overflow port and the water inlet port. The solution provision unit includes a provision port (121) through which acid solution is provided by the user, a solution supply path (113) through which the acid solution provided through the provision port circulates, and a solution inlet port (112) through which the acid solution flowing through the solution supply path flows into the tank. The solution supply path of the solution provision unit includes an expansion part in which a flow-path cross-sectional area increases toward the solution inlet port (112).