Hair Dryer Reverse Airflow Cleaning for Dust-Clogged Inlets
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Solution Overview
Problem
Existing hair dryers require inefficient manual cleaning of air inlet holes due to blockages from hair and dust, reducing air inflow and increasing user effort.
Innovation Solution
A hair dryer with a reverse blowing dust-cleaning function, featuring a brushless motor, fan blade, and a circuit control board that allows for reverse rotation of the air machine module, using a microcontroller and power drive module to introduce air from the outlet to blow out dust and hair from the inlet, eliminating the need for manual cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the air inlet holes are designed with a large number to ensure sufficient air inflow, then the air intake performance is improved, but the difficulty of cleaning each hole individually increases, resulting in low dust-cleaning efficiency
Solution Approach 1:
The patent applies reverse rotation of the air machine module to blow air from the air outlet back through the airflow channel to the air inlet, inverting the normal airflow direction. This reverse airflow automatically removes dust and hair blockages from the air inlet holes, solving the cleaning efficiency problem without requiring manual intervention for each hole
2Reliability
If manual cleaning of air inlet holes is required to maintain air flow, then the air inlet unobstruction is achieved, but the user effort and time consumption increase significantly
Solution Approach 1:
The patent enables the air machine module to perform self-cleaning by reversing its rotation direction. The reverse airflow automatically clears dust and hair from the air inlet holes, allowing the device to maintain its own air inlet unobstruction without requiring user intervention, thereby eliminating cleaning time loss
3Productivity
If the air machine module rotates forward to dry hair, then the hair drying function is achieved, but the blockage of air inlet holes by foreign matters accumulates, reducing air volume
Solution Approach 1:
The patent implements periodic alternation between forward rotation (for hair drying) and reverse rotation (for dust removal). The control board switches the rotation direction based on operational needs, creating a periodic cycle that maintains air inlet cleanliness while ensuring continuous hair drying functionality, thus preventing air volume reduction
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 reverse blowing function significantly improves dust-cleaning efficiency by automatically dislodging blockages from the air inlet, reducing user effort and maintaining airflow, while the microcontroller and power drive module ensure controlled and adaptable cleaning.
Implementation Method 1
the air machine module comprises a brushless motor and a fan blade arranged on an output shaft of the brushless motor
Implementation Method 2
the brushless motor drives the fan blade to rotate and push the air
Implementation Method 3
a heating resistance wire arranged in the housing
Implementation Method 4
control the reverse rotation of the air machine module through the trigger portion, and then the air machine module can introduce air from the air outlet and blow out from the air inlet, to facilitate the reverse blowing off of the foreign matters
Data Source
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AI summary
The present application discloses a hair dryer having a reverse blowing dust-removal function. The hair dryer comprises a housing, a fan module, an air inlet, and an air outlet. The housing has a pass-through airflow channel between the air inlet and the air outlet. The fan module is disposed within the airflow channel of the housing. A circuit control board is disposed within the housing. A micro-controller and a power supply drive module are disposed on the circuit control board. The power supply drive module is connected to the fan module. The micro-controller is connected to the power supply drive module. A reverse rotation button connected to the micro-controller and a forward rotation button connected to the micro-controller are disposed on the housing. The micro-controller controls, in response to a forward rotation signal output by the forward rotation button, the fan module to rotate in a forward direction by means of the power supply drive module. The micro-controller controls, in response to a reverse rotation signal output by the reverse rotation button, the fan module to rotate in a reverse direction by means of the power supply drive module. The micro-controller only responds to the reverse rotation signal output by the reverse rotation button when the forward rotation button is not being triggered. The present application has a high dust-removal efficiency feature.