Bypass Nozzle Sensor Segmentation for Heat Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing nozzle devices for air conveyance in blowers face inaccuracies and delayed response times due to heat effects on sensors, particularly mass flow sensors with resistors, which affect the measurement of air parameters.
Innovation Solution
A nozzle device design featuring a bypass flow that directly aligns with spaced-apart webs supporting the sensor's measuring means, minimizing external heat influence and incorporating a dust separator to improve measurement accuracy and response time, with the bypass flow routed to flow around the measuring components and a guide device ensuring direct and turbulence-free impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is placed in the bypass flow, then the sensor can measure air parameters, but heat effects from resistors falsify measurement accuracy
Solution Approach 1:
The sensor is divided into multiple individual webs spaced apart from one another, with measuring means arranged on each web. This segmentation allows the bypass flow to pass around each measuring means independently, reducing heat accumulation and improving measurement accuracy.
Solution Approach 2:
The bypass flow acts as an intermediary medium that carries the air sample past the measuring means without direct contact with heat-generating components. The guide device directs this intermediary flow to ensure proper positioning and minimize turbulence.
2Measurement precision
If the sensor is placed in the bypass flow, then the sensor can measure air parameters, but the response time is delayed
Solution Approach 1:
By distributing measuring means across multiple spaced-apart webs, the sensor achieves faster response time as the bypass flow can simultaneously reach multiple measurement points, reducing the delay inherent in single-point measurement.
Solution Approach 2:
The guide device is positioned upstream of the sensor to pre-direct the bypass flow toward the measuring means, ensuring the flow is already aligned and ready for immediate measurement when air mass changes occur.
3Measurement precision
If the bypass flow is directed directly onto the measuring means, then measurement accuracy is improved, but turbulence may affect the flow
Solution Approach 1:
The guide device features localized nozzle openings aligned with specific webs, creating controlled flow patterns at each measurement point while maintaining overall flow stability. This local customization allows direct impact on measuring means without generating harmful turbulence.
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 design enhances the precision and speed of air parameter measurements by isolating the sensors from external heat and dust, allowing for immediate and accurate detection of air mass changes.
Implementation Method 1
a bypass provided on the outside of the nozzle housing, which is flow-connected to an interior of the nozzle housing and the main flow via a housing wall opening, so that the bypass can be flowed through by a bypass flow
Implementation Method 2
A sensor for measuring parameters of the conveyed air is arranged in the bypass
Implementation Method 3
The mass flow can be measured using the anemometer principle known to those skilled in the art
Implementation Method 4
a guide device arranged upstream of the sensor in the bypass is provided for directing the bypass flow to the respective webs of the sensor and in particular to its measuring means
Implementation Method 5
a dust separator, which removes fine dust from the bypass flow, is arranged upstream of the sensor in the direction of flow in the bypass
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a nozzle device for conveying air in a blower, comprising a nozzle housing for directing a main flow, a bypass provided on the outside of the nozzle housing, which is connected via a housing wall opening to the interior of the nozzle housing and the main flow, so that the bypass can be permeated by a bypass flow, a sensor arranged in the bypass for measuring parameters of the conveyed air, which has several individual and spaced-apart ribs on which measuring means of the sensor are arranged, and a guiding device arranged upstream of the sensor in the bypass for directing the bypass flow onto the respective ribs of the sensor, wherein the guiding device has several nozzle openings which are each oriented towards the ribs of the sensor, so that the bypass flow is directed through the nozzle openings directly onto the measuring means arranged on the ribs.