Self-Cleaning Air Filter Module for Projection Devices
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Solution Overview
Problem
Existing projection devices face cooling efficiency issues due to dust accumulation on air filters, which reduces airflow and heat dissipation, especially in high-dust environments, where axial fans or blowers can introduce external dust, and existing solutions do not effectively address the blockage of filter meshes over time.
Innovation Solution
An air filter module with a cleaning unit that includes a filter component and a driving force generation assembly, utilizing electromagnets and magnetic devices to create a vibrating mechanism that removes dust from the filter, along with a control unit to manage fan rotation for efficient dust removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If axial fans or blowers are used for cooling components in the projection device, then cooling efficiency is improved, but dust from the external environment is introduced into the device
Solution Approach 1:
An air filter is introduced as an intermediary component between the external environment and the projection device interior. The filter allows airflow to pass through while blocking dust particles, thus maintaining cooling efficiency while preventing dust contamination of internal components
2Object-affected harmful factors
If an air filter is installed to prevent dust adhesion, then dust protection is improved, but dust accumulation on the filter reduces airflow rate
Solution Approach 1:
The system performs periodic reverse rotation of the fan to create reverse airflow that dislodges and removes accumulated dust from the filter surface. This periodic cleaning action restores the filter's airflow capacity without requiring manual intervention, thus maintaining productivity over extended operation periods
Solution Approach 2:
The fan automatically performs cleaning of the filter by reversing its rotation direction. The system uses its own operational resources (fan motor) to maintain the filter's performance, enabling self-service dust removal without external intervention or additional complex cleaning mechanisms
3Ease of manufacture
If manual cleaning of the filter is required, then manufacturing simplicity is maintained, but operation convenience deteriorates
Solution Approach 1:
The system automatically cleans its own filter by utilizing the existing fan component. The control unit manages the fan's rotation direction to perform cleaning operations, eliminating the need for manual filter maintenance while keeping the overall system structure simple and avoiding additional complex cleaning mechanisms
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 air filter module efficiently removes dust from the filter component, enhancing cooling efficiency and user convenience by providing an automatic dust removal function within the projection device.
Implementation Method 1
The drive unit includes at least one electromagnet
Implementation Method 2
The driving force is a magnetic force generated by an interaction between the electromagnet(s) and the magnetic device(s) corresponding to the electromagnet(s)
Data Source
AI summary
An air filter module adapted to be used with a projection module and disposed to cover an air vent of the projection module. The air filter module includes a filter component and a cleaning unit. The cleaning unit is disposed to cover the air vent and configured to drive the filter component to have a movement so as to remove the dust on the filter component according to a cleaning-start signal. A projection device adopting the air filter module is also provided.