Secondary Air Device Filter Attachment for Soot Leakage
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Solution Overview
Problem
Existing secondary air devices for fireplace exhaust systems suffer from leakage of soot and dust particles through the air inlet opening, leading to air quality issues and potential functional impairment of electrical devices.
Innovation Solution
A secondary air device with a filter attachment that includes a housing and a fixed filter section, designed to be assembled downstream of the train limiter using a plug-in system or clamping tape, which prevents the leakage of soot and dust particles while maintaining airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an external filter attachment is arranged at the air inlet opening to prevent dust and soot particles from escaping, then particle leakage is prevented, but the filter is exposed to external damage and presents an unsightly appearance
Solution Approach 1:
The filter attachment is nested inside the housing of the secondary air device, with the filter element positioned within the internal cavity. This internal arrangement protects the filter from external damage while maintaining its particle filtration function, eliminating the need for an exposed external filter
Solution Approach 2:
The filter attachment is integrated into the housing structure of the secondary air device, combining the filtration function with the existing device architecture. The filter holder and filter element are incorporated as part of the housing assembly, creating a unified structure that is both protective and aesthetically pleasing
2Object-affected harmful factors
If an external filter attachment is arranged at the air inlet opening to prevent dust and soot particles from escaping, then particle leakage is prevented, but the visual appearance is impaired
Solution Approach 1:
The filter attachment is nested inside the housing of the secondary air device, with the filter element positioned within the internal cavity. This internal arrangement maintains the external aesthetic appearance of the device while preserving the filtration function against dust and soot particles
Solution Approach 2:
The filter attachment is integrated into the housing structure of the secondary air device, combining the filtration function with the existing device architecture. This integration ensures the filter does not protrude or create unsightly external features, maintaining a clean visual appearance
3Productivity
If the pendulum flap is opened slightly at high temperatures to maintain operation, then the device can function, but soot particles escape into the installation room
Solution Approach 1:
The filter element acts as an intermediary between the air inlet opening and the installation room. It allows air to pass through while intercepting and retaining soot and dust particles, enabling the pendulum flap to remain slightly open for operational continuity without compromising air quality in the installation room
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 filter attachment effectively prevents the leakage of soot and dust particles, improving air quality and protecting electrical devices, while being protected from damage and maintaining the appearance of the secondary air device.
Implementation Method 1
a filter attachment (30) comprising a housing (32) and a filter section (36) arranged fixedly in the housing (32), wherein the filter section (36) is designed such that it is impermeable to soot and ash particles
Implementation Method 2
They serve to limit the chimney draft in a chimney or in the exhaust pipe of an exhaust system. Such secondary air devices typically incorporate draught restrictors for this purpose, which can transition between a closed position and an open position depending on a pressure difference between the interior of the exhaust system and the surroundings
Data Source
Figure 1A~2B
Figure 3A~3D
AI summary
The present invention relates to a filter attachment (30) for a secondary air device (10) of an exhaust system of one or more combustion appliances, wherein the filter attachment (30) comprises a housing (32) and a fixed filter section (36) enclosed therein, wherein the housing (32) is designed such that the filter attachment (30) can be mounted between an installation point (14) and a draft regulator (16) of the secondary air device (10) via a mounting system, for example a plug-in system (26) or a clamping band, and the filter section (36) is designed such that it is impermeable to soot and dust particles.