Inhalation device for local ventilation system
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Solution Overview
Problem
Conventional intake apparatuses for local ventilation systems experience decreased air flow speed and efficiency due to air current interference within the intake duct, leading to eddy currents and reduced exhaust efficiency.
Innovation Solution
The proposed intake apparatus features a connection opening, a hood with multiple intake fans, a mixed flow prevention body, lattice exhaust guide flow passages, and an air current alignment lattice, along with an air current interference release skirt and adjustable lattice parts to minimize interference and optimize air flow alignment within the intake duct.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple intake fans are installed at the periphery of the intake opening to generate intake air current, then the ventilation force is improved, but air current interference and eddy currents occur within the intake duct causing decreased air flow speed
Solution Approach 1:
The intake duct is divided into multiple separate intake ducts, each corresponding to one intake fan. This segmentation prevents air current interference between fans by providing dedicated flow paths, thereby maintaining high ventilation force while ensuring smooth air flow without eddy currents.
Solution Approach 2:
A guide wall is introduced as an intermediary structure within the intake duct to separate and guide air currents from different fans. The guide wall acts as a mediator that organizes the air flow, preventing direct interference between adjacent air currents and eliminating eddy current formation.
2Area of stationary object
If the intake opening is formed larger than the connection opening to allow sufficient air intake, then the air intake capacity is improved, but air current collisions occur leading to reduced exhaust efficiency
Solution Approach 1:
The intake duct is segmented into multiple separate ducts that correspond to different regions of the large intake opening. This allows the large opening area to be utilized for maximum air intake capacity while each segmented duct maintains organized, collision-free air flow paths, preserving exhaust efficiency.
Solution Approach 2:
The problem of air current collision in the horizontal plane is resolved by introducing vertical dimensionality through guide walls and stacked duct arrangements. Air currents are separated not only horizontally but also vertically, allowing the large intake opening to function at full capacity without compromising exhaust efficiency.
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 configuration enhances air flow speed inside the intake duct, thereby improving the overall exhaust efficiency of the local ventilation system by reducing air current collisions and promoting smooth airflow.
Implementation Method 1
Each intake fan 120 includes a fan driving motor 121, and an impeller 122 installed at both sides of the fan driving motor 121 to rotate together when a motor shaft rotates
Data Source
AI summary
Embodiments of the invention provide an intake apparatus for a local ventilation system. According to at least one embodiment, the intake apparatus includes a connection opening, a hood configured to connect an intake opening larger than the connection opening, an intake duct coupled to the hood while communicating with the connection opening, and an intake fan which is installed at a peripheral portion of the intake opening so as to generate an intake air current in the direction of the connection opening. According to at least one embodiment, the intake fan is provided multiple in number in the circumference direction of the intake opening to generate an intake air current flowing from the intake opening to the connection opening, and a mixed flow prevention body is formed protruding in a partition shape from the intake opening to the intake duct along the inner side of a corner of the hood, and a plurality of lattice exhaust guide flow passages are disposed on straight lines and are isolated from each other, and an air current alignment lattice is installed in the inner space of the intake duct for the lattice exhaust guide flow passage to be disposed in the longitudinal direction of the intake duct.