Mobile Fan Unit With Pivoting Frame for Directed Smoke Ventilation
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Solution Overview
Problem
Existing fan units for mobile use are either too large for transport or lack the ability to efficiently adjust airflow direction in contaminated areas, such as those with smoke or gases.
Innovation Solution
A compact fan unit design featuring a lifting frame with pivot arrangements that allows for adjustable airflow direction, incorporating a separate support frame and pivot drive for easy operation and transportation, and a nozzle head for adding extinguishing agents to the airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fan unit is designed to be compact for transport, then portability is improved, but the ability to generate sufficient airflow during operation deteriorates
Solution Approach 1:
The fan unit is divided into a compact base unit for transport and a deployable support frame that can be extended during operation. The axial fan is mounted on the support frame which can be collapsed to a compact size for transport and extended to provide structural support and airflow direction control during operation, thus resolving the contradiction between compact transport size and sufficient operational airflow generation.
Solution Approach 2:
The support frame is designed with movable elements that can transition between a compact configuration for transport and an extended configuration for operation. The inclination adjustment mechanism allows dynamic repositioning of the axial fan to optimize airflow direction, enabling the unit to adapt its structure based on operational requirements while maintaining compactness during transport.
2Device complexity
If the axial fan is fixed in position, then device complexity is reduced, but the ability to adjust airflow direction deteriorates
Solution Approach 1:
The axial fan is mounted on the support frame with an inclination adjustment mechanism that enables dynamic repositioning of the fan. This allows the airflow direction to be adjusted according to operational needs while maintaining a relatively simple mounting structure that integrates with the support frame, thus resolving the contradiction between device complexity and airflow direction adaptability.
3Ease of operation
If the fan unit is designed for easy transport, then ease of operation is improved, but the stability during operation deteriorates
Solution Approach 1:
The fan unit separates the portable base unit from the deployable support frame structure. The base unit contains the compact axial fan and can be easily transported, while the support frame provides structural stability when deployed. This segmentation allows the unit to be easy to transport while maintaining operational stability when set up, resolving the contradiction between transportability and operational stability.
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 design provides a stable, portable, and efficient airflow adjustment capability, enabling effective ventilation in contaminated areas while being compact enough for easy transport and operation, with the added benefit of adjustable airflow direction and the ability to incorporate extinguishing agents.
Implementation Method 1
an axial fan (3) having a drive unit (10), a fan wheel (11a) connected to it in a driving arrangement and a fan housing (11) accommodating the fan wheel (11a)
Implementation Method 2
a first pivot arrangement (8) for the lifting frame (4)... a second pivot arrangement (17) with a second pivot axis (18)
Data Source
AI summary
The invention relates to a fan unit (1) for mobile use for ventilating an area in which it is deployed, in particular for circulating fresh air in areas contaminated by smoke or gases, which comprises a main frame (2), having a lifting frame (4) mounted thereon and an axial fan (3). A first pivot arrangement (8) for the lifting frame (4) is disposed on the one hand in the region of a frame part (7) extending up from a base frame (6) and on the other hand in a first end region (14) of the lifting frame (4) facing the frame part (7). The lifting frame (4) can be adjusted in terms of its vertical distance from the base frame (6) from a non-operating position lying closer thereto into a raised deployment position. A second pivot arrangement (17) is disposed on the lifting frame (4) about which a support frame (19) is mounted so as to be pivotable in terms of its relative position with respect to the base frame (6). The axial fan (3) is retained on the lifting frame (4) with the support frame (19) connected in between.