Ventilator set with ventilation pipe, multiple ventilator components and a simulation orifice and method for measuring the tightness of a building
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Solution Overview
Problem
Current methods for measuring building tightness do not account for functionally induced leaks from fan units during different construction stages, making it difficult to compare measurement results and achieve the required tightness limit values.
Innovation Solution
Incorporating a simulation panel with the same flow resistance as the fan unit into the fan pipe before completion, allowing for accurate simulation of air flow resistance and enabling comparable tightness measurements across construction stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sealing methods (covers, balloons, foil masking) are used to seal empty ventilator tubes during construction, then the tubes can be sealed for measurement, but the flow resistance of actual fan units cannot be simulated, making measurement results incomparable across construction stages
Solution Approach 1:
The patent uses a simulation panel that copies the flow resistance characteristics of the actual fan unit without requiring the complete fan assembly. The simulation panel is designed to replicate the air flow resistance properties, allowing tightness measurements to be performed with comparable results across different construction stages while using a simplified, lighter-weight component.
Solution Approach 2:
The simulation panel's aperture is specifically dimensioned to create the same flow resistance as the complete fan unit it replaces. By carefully controlling the aperture size and shape parameters, the panel reproduces the hydraulic resistance characteristics of the fan components, enabling accurate simulation without the complex mechanical structure of actual fans.
2Measurement precision
If fan units are installed early to enable accurate tightness measurements, then measurement accuracy improves, but construction workflow is disrupted and fan units are exposed to contamination during construction work
Solution Approach 1:
The simulation panel is installed in the ventilator tube during construction stages before the actual fan units are mounted. This preliminary action allows tightness measurements to be performed with flow resistance simulation, and the simulation panel can remain in place or be removed without disrupting the subsequent fan unit installation workflow.
Solution Approach 2:
The simulation panel serves as an intermediary component that temporarily replaces the fan unit during measurement phases. It provides the necessary flow resistance characteristics for accurate measurements while protecting the construction workflow from disruption and preventing contamination of actual fan units during construction activities.
3Measurement precision
If the simulation panel aperture is made larger to reduce flow resistance, then air flow increases, but the simulation no longer accurately represents actual fan unit resistance; if made smaller, then flow resistance increases, but air flow becomes insufficient for accurate measurement
Solution Approach 1:
The simulation panel's aperture dimensions are carefully calculated and optimized to match the flow resistance characteristics of the specific fan unit it represents. The aperture size, shape, and position are controlled parameters that directly determine the flow resistance, allowing precise simulation without requiring complex adjustment mechanisms.
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
This approach allows for more accurate and comparable tightness measurements by simulating the flow resistance of fan units, enabling better sealing strategies and ensuring compliance with tightness limit values, thus improving the airtightness of buildings.
Implementation Method 1
the simulation screen forms the same flow resistance for an air flow through the ventilation pipe as all the fan components used together
Implementation Method 2
a specified negative or positive pressure is generated inside the building, the resulting air volume flow is measured
Data Source
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AI summary
The invention relates to a fan set comprising a fan duct (1.1), several fan components (1.2.x) that can be inserted into or attached to the empty fan duct (1.1) to form a fan unit (1), and a simulation baffle (0.1) with an aperture opening that can alternatively be inserted into or attached to the empty fan duct (1.1) to form a simulator (0) with the fan duct (1.1). A simulator (0) formed in this way has the same flow resistance for an airflow passing through it as a fan unit (1) formed in this way. The invention also relates to a method for measuring the airtightness of a building in different construction phases, in which the air volume flow passing through the fan ducts (1.1) is the same in different construction phases in which an airtightness measurement is carried out.