Flat Wastewater Drain with Segmented Siphon Chamber
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Solution Overview
Problem
Existing wastewater drains with odor traps for flat shower trays face challenges in achieving high drainage capacity with a low design while maintaining effective odor prevention, often resulting in high installation heights due to the use of round drains and inadequate support for the cover.
Innovation Solution
A wastewater drain design featuring a flat housing with a support element for the cover, a chamber system based on the siphon principle, and an adapter piece to connect to standard round pipes, optimizing flow and odor barrier performance by ensuring a gas-tight separation between chambers and using a conical support element to enhance drainage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a round drain design is used to achieve adequate drainage capacity, then the drainage performance is improved, but the installation height increases
Solution Approach 1:
The drain is divided into multiple functional chambers (first chamber for odor trap, second chamber for drainage) arranged in sequence along the flow path. This segmentation allows each chamber to be optimized independently - the first chamber provides odor prevention with minimal height, while the second chamber handles high-volume drainage, achieving both goals without increasing overall installation height
Solution Approach 2:
The patent transitions from a traditional circular cross-sectional design to a rectangular cross-section with multi-chamber arrangement. This dimensional change allows the chambers to be arranged in a linear sequence along the flow direction rather than radially, enabling adequate drainage capacity through extended flow path length without increasing the vertical installation height
2Length of moving object
If the second chamber does not completely surround the first chamber to reduce height, then the installation height is reduced, but the odor barrier effectiveness deteriorates
Solution Approach 1:
The first chamber wall is designed with locally enhanced properties - it extends higher than the second chamber wall to form an effective odor barrier, while the second chamber maintains adequate dimensions for drainage. This local quality differentiation ensures odor prevention at the critical interface without compromising overall drainage capacity or increasing installation height
3Productivity
If the outlet is dimensioned large to achieve adequate drainage performance, then the drainage capacity is improved, but the overall height of the system increases
Solution Approach 1:
The drainage function is segmented into the second chamber which is specifically designed for high-volume water flow. By separating the odor trap function (first chamber) from the drainage function (second chamber), the second chamber can be optimized for horizontal flow capacity with adequate outlet dimensions without increasing vertical height, as the overall height is constrained by the taller first chamber wall
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 design achieves a high drainage capacity with a low overall height, meeting DIN standards for drainage performance and odor barrier effectiveness, while allowing for easy installation and maintenance.
Implementation Method 1
a chamber system designed according to the well-known siphon principle
Implementation Method 2
The bottom of the flat housing has a sloped contour in the direction of the drain connection. This gradient continuously expands the drain channel and also promotes the flow of water towards the drain nozzle
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a wastewater drain (1) with a trap, comprising a flat housing (3), a cover (12) connectable to the flat housing, and an inlet nozzle (16) connected to the cover (12) that extends to just above the bottom of the flat housing. The wastewater drain is characterized in that: • a cylindrical base insert (9) is sealed in a receptacle (8) provided at the edge of a recess (61) in the floor and terminates below the cover, so that the base insert forms a retaining wall; and • a drainage channel (33) surrounding the retaining wall of the base insert is formed, which opens into a lateral outlet opening and has a slope contour inclined towards the latter. The invention also relates to a shower base element (2) with such a wastewater drain (1), in which the wastewater drain (1) is integrated into the shower base element (2), and to the method of its manufacture.