Condensate discharge device for a heating device and heating device
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Solution Overview
Problem
Existing condensing boilers face issues with pressure-neutral condensate drainage and liquid backflow prevention, particularly when incorrectly installed, leading to potential damage from washing machine and dishwasher water being forced back into the boiler.
Innovation Solution
A condensate drain device comprising an inlet nozzle, backflow preventer, and drain siphon, designed as a module that ensures pressure-neutral drainage and prevents backflow using a self-contained, direction-sensitive valve and a bottle siphon to create a gas and odor barrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the boiler's condensate drain is connected directly to washing machine/dishwasher drains without a sanitary siphon, then installation simplicity is improved, but liquid backflow into the boiler occurs causing damage
Solution Approach 1:
The condensate drainage system is segmented into distinct functional components: the inlet nozzle for condensate entry, the backflow preventer with floating closure element for one-way flow control, and the drain siphon for pressure-neutral drainage. This segmentation allows each component to perform its specific function effectively, preventing backflow while maintaining installation simplicity.
Solution Approach 2:
The backflow preventer acts as an intermediary device between the boiler condensate drain and the household appliance drains. Its floating closure element automatically opens to allow condensate flow from the boiler to the drain, but closes to prevent liquid backflow from the drain into the boiler, thus mediating the interaction between these two systems.
2Reliability
If a sanitary siphon is installed for pressure-neutral drainage, then protection against backflow is improved, but device complexity increases
Solution Approach 1:
The backflow preventer and drain siphon are merged into a single integrated condensate drainage device that can be directly connected to the boiler. This combination provides both backflow prevention and pressure-neutral drainage functions in one unit, eliminating the need for separate sanitary siphon installation while maintaining protection against backflow.
Solution Approach 2:
The integrated condensate drainage device performs multiple functions: it serves as the condensate inlet, includes backflow prevention through the floating closure element, provides pressure-neutral drainage through the siphon effect, and creates a gas barrier. This multi-functionality reduces system complexity while maintaining reliability.
3Object-affected harmful factors
If the drain siphon forms a gas barrier, then prevention of gas leakage is improved, but device complexity increases
Solution Approach 1:
The gas barrier function is merged into the drain siphon component itself. The siphon's liquid seal naturally prevents gas passage while the same component provides pressure-neutral drainage. This integration avoids adding separate gas barrier devices, thereby preventing gas leakage without significantly increasing device complexity.
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
Ensures effective, pressure-neutral condensate drainage and prevents liquid backflow into the boiler, even with incorrect installations, while maintaining a gas and odor barrier.
Implementation Method 1
The drain siphon (5) forms a gas or odor barrier
Implementation Method 2
With a bottle siphon, a pipe section ends in a bottle-shaped container containing (always) liquid. This liquid prevents gases from being passed through.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Condensate drain device (1) for a heating appliance (2), comprising an inlet nozzle (3), a backflow preventer (4) and a drain siphon (5).