Grouped Induction Nozzle Ventilation to Reduce Sound Pressure
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Solution Overview
Problem
Existing ventilation devices with induction nozzles operate at high sound pressure levels despite requiring high induction power, which is undesirable for quiet operation.
Innovation Solution
The use of smaller induction nozzles with a smaller cross section, arranged in groups of three with closer distances between each other, producing a merged induction air jet that maintains or exceeds the induction effect of larger nozzles while reducing sound pressure levels, and allowing for adjustable nozzle openings to control the induction effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If larger cross-section induction nozzles are used, then the induction effect is improved, but the sound pressure level increases
Solution Approach 1:
The patent divides a single large induction nozzle into multiple smaller induction nozzles arranged in groups. Each group contains several small nozzles (e.g., 3-9 nozzles) that collectively provide the required induction effect while operating at lower individual sound pressure levels. The segmentation allows the system to achieve the same total induction power as a large nozzle while reducing the harmful sound pressure through distributed operation of multiple smaller units.
Solution Approach 2:
The patent combines the air jets from multiple small induction nozzles within each group to form a fused induction air jet. The nozzles in a group are positioned and oriented so their jets merge together, creating a unified flow pattern that produces an induction effect comparable to a single large nozzle. This merging of multiple small jets achieves the cumulative induction effect while maintaining the low sound pressure characteristics of the smaller individual nozzles.
2Object-affected harmful factors
If multiple small induction nozzles are used instead of one large nozzle, then the sound pressure level is reduced, but the induction effect may be compromised
Solution Approach 1:
The patent applies local quality by creating fused induction air jets from grouped nozzles that locally replicate the flow characteristics of a single large nozzle. The merging of jets within each group produces a localized flow structure with properties similar to a large nozzle's single jet, ensuring that the induction effect in each local zone is sufficient. This local quality approach allows multiple small nozzles to collectively achieve the induction effect of a large nozzle while maintaining low sound pressure levels.
Solution Approach 2:
The patent transitions from a single-dimension approach (one large nozzle) to a multi-dimensional arrangement by organizing multiple small nozzles in spatial groups with specific configurations. The nozzles are arranged in three-dimensional space with particular spacing and orientation relationships, allowing their jets to merge and create an effective induction zone. This dimensional approach enables the system to achieve equivalent induction power through spatial distribution rather than relying on a single large cross-section.
3Power
If induction nozzles are arranged closer together in groups, then the induction air jets can merge effectively, but the device complexity increases
Solution Approach 1:
The patent segments the induction nozzle system into discrete groups, where each group contains a specific number of nozzles (e.g., 3, 5, or 9 nozzles per group) arranged in standardized configurations. This segmentation into modular groups simplifies the overall design by creating repeatable units that can be systematically arranged along the air handling device. Each group is designed with fixed spacing and orientation parameters, reducing the complexity of determining optimal nozzle arrangements while ensuring effective jet fusion within each group.
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 achieves a comparable induction effect to larger nozzles with significantly lower sound pressure levels, allowing for efficient ventilation and air-conditioning with reduced noise, and enabling control over the induction effect through adjustable nozzle openings.
Implementation Method 1
By operating the induction nozzles with air, an induction effect is generated, which causes air, in particular secondary air, to be drawn in and mixed with the air blown out of the induction nozzles
Implementation Method 2
the air jets from the induction nozzles of each group merge to form only one induction air jet
Data Source
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AI summary
The invention relates to a ventilation device (1) designed as an induction device (2) and having a plurality of induction nozzles (16) operated with air, in particular with primary air. The induction nozzles (16) are designed and/or arranged in groups in such a way that air jets (22) emerging from the induction nozzles (16) of a group (21) or each of the groups (21) go to or only to one Merge induction air jet (23). Furthermore, the invention relates to a corresponding method.