Blower Switch Placement and Nozzle Aerodynamics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blowers face challenges with user-operated speed control due to the placement of the main switch, dust accumulation affecting switch functionality, poor stability and noise of the blow nozzle, and user fatigue from the blower's weight.
Innovation Solution
The blower design includes a main switch and speed adjusting switches positioned for easy user access, a separating board to isolate heat dissipation airflow from switch elements, and a detachable blow nozzle with a streamlined structure to enhance airflow velocity and reduce noise, along with a handle and hook system to improve user comfort and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the main switch is arranged on the handle at a lower side, then the blower structure is compact, but the user cannot easily observe the switch displacement and control the motor speed
Solution Approach 1:
The patent moves the speed adjusting switch from the traditional handle location to the air tube, changing the spatial dimension of control element placement. This allows the switch to be positioned in a location that is both structurally integrated and easily accessible/observable by the user during operation.
2Device complexity
If the main switch or function switches are arranged in the accommodation cavity, then the blower structure is compact, but dust accumulation from heat dissipation airflow causes switch failure
Solution Approach 1:
The patent extracts the speed adjusting switch from the dust-prone accommodation cavity and relocates it to the air tube. This separation removes the switch element from the harmful environment of heat dissipation airflow and dust accumulation, while maintaining functional integration of the blower system.
3Ease of manufacture
If the blow nozzle has a simple structure, then manufacturing is easy, but the blowing airflow velocity is reduced and noise increases
Solution Approach 1:
The patent employs a curved surface design for the blow nozzle instead of simple straight geometries. The curved structure optimizes airflow dynamics by reducing turbulence and enhancing flow velocity, while also serving as an aesthetic design element that does not significantly complicate manufacturing.
4Stability of the object's composition
If the blower has a fixed heavy structure, then structural stability is maintained, but the user feels tired after long-time use
Solution Approach 1:
The patent introduces a detachable hook that can be connected or disconnected based on usage needs. When connected, the hook provides additional support to reduce user fatigue; when disconnected, the blower maintains its stable handheld structure. This dynamic accessory system adapts to different operational requirements without compromising the core structural integrity.
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 allows for precise speed control, reduces dust-related failures, improves airflow efficiency, and decreases user fatigue by optimizing switch placement and airflow dynamics, while the hook system distributes weight for reduced user strain.
Implementation Method 1
the fan may be driven by the electric motor, and when the fan rotates, a blowing airflow entering the air duct from the air inlet may be generated
Implementation Method 2
When the blower is operating, a heat dissipation airflow flowing through the accommodation cavity is generated, and the heat dissipation airflow is used to dissipate heat of the circuit board in the accommodation cavity
Data Source
AI summary
A blower includes an air tube, an electric motor, a fan, a housing, and a circuit board. The air tube is provided with an air duct extending along a first straight line. The electric motor is arranged in the air duct. The fan is operative to be driven by the electric motor. The housing is provided with a handle configured to be held by a user and a joining portion configured for connecting to a power source. And the circuit board is electrically connected to the electric motor. The air tube is provided with an air inlet at one end of the air duct and an air outlet at another end of the air duct. The fan is arranged in the air duct, and when the fan rotates, a blowing airflow entering the air duct from the air inlet is generated.