Blower Nozzle Dust Separator for Sensor Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air sensors on nozzle devices used in blowers become contaminated with dust, leading to inaccurate measurements due to fine dust deposition over time, which falsifies the signal supplied.
Innovation Solution
A nozzle device with a dust separator that routes a bypass flow of air through a fine dust impact separator, ensuring the air reaching the sensor is cleaned of fine dust particles, and the sensor is positioned to receive the cleaned air flow directly, with features like baffle plates and guide plates enhancing dust separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is exposed to the conveyed air for measurement, then the measurement function is enabled, but the sensor becomes contaminated with dust and fine dust over time
Solution Approach 1:
The air flow is divided into two paths: a main flow that carries dust particles and a bypass flow that is diverted through the dust separator. The sensor only receives the cleaned bypass flow, separating the measurement function from the contaminated main flow path.
Solution Approach 2:
A dust separator is introduced as an intermediary component between the conveyed air and the sensor. This separator removes dust particles from the air flow before it reaches the sensor, protecting the sensor while maintaining measurement capability.
2Reliability
If a dust separator is added to protect the sensor, then the sensor is protected from contamination, but the device complexity increases
Solution Approach 1:
The bypass flow path serves multiple functions: it protects the sensor from dust contamination while simultaneously providing a continuous supply of cleaned air for measurement. The dust separator is integrated into the existing nozzle housing structure, combining protection and measurement functions in a unified system.
Solution Approach 2:
The dust separator is integrated within the nozzle housing structure, with the bypass flow path nested within the main flow path. The sensor is positioned to receive only the cleaned bypass flow, creating a nested arrangement where the measurement function is embedded within the protected bypass channel.
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 effectively prevents fine dust from adhering to the sensor, providing unadulterated measurement results and maintaining signal stability by ensuring the air mass flow is free from contamination, thus ensuring accurate air mass flow measurement.
Implementation Method 1
the bypass flow forms a jet flow when flowing through the nozzle holes and impacts against a baffle surface of the subsequent baffle plate
Implementation Method 2
the fine dust in the ambient air settles more and more on the measuring equipment of the sensor over time
Implementation Method 3
the fine dust particles are separated and adhere to the impact plate
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 with an outer wall surface, wherein a dust separator with at least one flow inlet opening and at least one flow outlet opening is provided on the outer wall surface, and the at least one flow inlet opening is connected to the interior of the nozzle device via at least one housing wall opening, so that a portion of the air conveyed by the nozzle device flows through the dust separator as a bypass flow, wherein a sensor for measuring parameters of the conveyed air is arranged at the at least one flow outlet opening of the dust separator in such a way that the bypass flow flowing from the at least one flow outlet opening of the dust separator directly impacts the sensor.