Portable air-filtering device
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Solution Overview
Problem
Infants are highly susceptible to air pollution, which can lead to lung diseases and other health issues due to inhalation of pollutants like heavy metals and gases, necessitating a solution to minimize their exposure to polluted air during outdoor activities.
Innovation Solution
A portable air-filtering device is designed to be integrated with baby-transporting devices, featuring an air-impermeable back layer and an air-permeable front layer that creates an internal cavity, utilizing a power-driven ventilator to generate overpressure and direct filtered air evenly around the baby, with an inner air filter capable of removing microparticles and gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a portable air-filtering device is integrated with a baby-transporting device to filter and purify air, then the air quality around the baby is improved, but the device complexity increases
Solution Approach 1:
The air-filtering device is integrated within the baby-transporting device structure, with the housing containing the ventilator, filters, and control unit nested inside the stroller frame. The front layer and back layer form an internal cavity that nests the airflow path within the existing stroller geometry, making the filtering system compact and portable without requiring separate external equipment.
Solution Approach 2:
The air-filtering device serves multiple functions: the ventilator draws in and circulates air, the outer air filter captures macroparticles, the inner air filter removes microparticles, and the heating element provides thermal comfort. This multi-functional integration allows a single device to address air quality, particle filtration, and temperature regulation needs simultaneously.
2Productivity
If a power-driven ventilator is used to draw air through filters and create overpressure, then the air purification efficiency is improved, but the energy consumption increases
Solution Approach 1:
The ventilator operates in periodic cycles, drawing air through the filtration system during active purification phases, then allowing passive air exchange during intervals. The control unit monitors air quality parameters and activates the ventilator only when purification is needed, rather than continuous operation, reducing overall energy consumption while maintaining effective air quality management.
Solution Approach 2:
The system adjusts ventilator speed and airflow rate based on detected air quality parameters and baby's needs. The heating element temperature is also dynamically adjusted. These parameter changes optimize the balance between purification efficiency and energy consumption, using higher power only when air quality deteriorates or thermal comfort is needed.
3Object-affected harmful factors
If an outer air filter and inner air filter are used to remove macroparticles and microparticles, then the air purification quality is improved, but the device complexity increases
Solution Approach 1:
The filtration system is segmented into two distinct stages: an outer air filter for macroparticle removal and an inner air filter for microparticle removal. Each filter is positioned at different locations in the airflow path, with the outer filter at the air inlet and the inner filter closer to the baby's breathing zone. This segmentation allows each filter to be optimized for its specific particle size range, improving overall purification quality while maintaining manageable complexity through functional division.
4Stability of the object's composition
If the front layer is made air-permeable to distribute air evenly, then the air distribution uniformity is improved, but the air impermeability of the back layer conflicts with the need for controlled airflow
Solution Approach 1:
The back layer is designed with air-impermeable properties to maintain overpressure in the internal cavity and control the direction of airflow toward the front layer. The front layer is made air-permeable with specific porosity to enable even air distribution across the baby's breathing zone. This local differentiation of permeability properties allows the system to simultaneously maintain pressure control at the source and achieve uniform distribution at the delivery point, resolving the contradiction between airflow control and distribution uniformity.
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 device effectively creates a localized environment of purified air around the baby, significantly reducing the concentration of microparticles and gases, thereby protecting them from harmful pollutants during strolls or transport.
Implementation Method 1
a first power driven ventilator arranged to draw air from an external surrounding through the air inlet into the internal cavity, so that an overpressure is generated in the cavity
Implementation Method 2
The overpressure in the internal cavity will force the air to flow through the front layer towards the inner area B
Implementation Method 3
an outer air filter arranged to cover the air inlet; an inner air filter arranged to face the inner area of the baby-transporting device
Implementation Method 4
the inner air filter is composed of an electrostatically charged material
Implementation Method 5
a heating element arranged to heat air in the internal cavity
Data Source
AI summary
The object of the present invention is to reduce the exposure of polluted air to a baby, and in particular to minimize the pollutions inhaled by a baby when strolling, walking or transporting a baby in an exterior environment. The object is attained by providing a portable device for filtering air, the device being adapted to be arranged in association with a top end of a baby-transporting device. With such an air-filtering device, air from outside of the baby-transporting device may be filtered and purified before being provided in a well-distributed manner to the area of the baby-transporting device where a baby is positioned.