Heating Blower with Movable Electric Heater for Airflow Mode Switching
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Solution Overview
Problem
Conventional blowers face inefficiencies when blowing cold air due to airflow passing through an electric heater, which reduces air output and requires high temperature resistance materials, as the heater is typically located inside the air duct.
Innovation Solution
A heating blower design where the electric heater is positioned outside the air duct, allowing airflow to switch between passing through the heater and not, using a moving assembly and micro switch to control airflow paths, increasing air volume and reducing material requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the electric heater is disposed inside the air duct, then the airflow can be heated effectively, but the air volume output is reduced and high temperature resistance materials are required
Solution Approach 1:
The patent implements a movable electric heater that can dynamically change position between inside and outside the air duct based on operational mode. The heater is connected to the air duct via a flexible connection, allowing it to move between a first position (inside the duct for heating) and a second position (outside the duct for cold air mode), thereby dynamically resolving the contradiction between heating efficiency and air volume output
Solution Approach 2:
The patent segments the air duct into multiple regions (first region, second region, third region) and positions the electric heater selectively in different regions. By dividing the air duct structure and using multiple air outlets, the system can direct airflow through different paths - either through the heater or bypassing it - thus achieving both heated and unheated air output modes
2Temperature
If the electric heater is disposed inside the air duct, then the airflow can be heated effectively, but the material requirements for high temperature resistance increase
Solution Approach 1:
The movable electric heater that can be positioned inside or outside the air duct allows the air duct to operate in both heated and unheated modes. When the heater is outside the duct, the entire air duct structure is not exposed to high temperatures, reducing the temperature resistance requirements for the duct materials and simplifying manufacturing requirements
3Quantity of substance
If the electric heater is disposed outside the air duct, then the air volume output is increased and material requirements are reduced, but the airflow cannot be heated effectively
Solution Approach 1:
The system uses a movable electric heater connected to the air duct, allowing the heater to be positioned inside the duct when heating is required. This dynamic positioning enables the system to achieve effective air heating when needed while maintaining the ability to output high air volume when the heater is positioned outside the duct
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
Enables efficient switching between hot and cold air modes with increased air output when blowing cold air and reduced material requirements for high temperature resistance.
Implementation Method 1
the electric heater is arranged on the moving assembly, and moves between the first area and the second area along with the moving assembly, so that an airflow blown from the first air outlet switches between a state of passing the electric heater and a state of not passing the electric heater
Data Source
AI summary
Provided is a heating blower, comprising an air duct, a motor and a wind wheel arranged in the air duct, and a heating device arranged at a first air outlet of the air duct; the wind wheel is fixed to a rotating shaft of the motor; the heating device comprises a housing, an electric heater and a moving assembly; the housing is sleeved on the first air outlet, forming an inner chamber, which comprises a first area facing directly to the first air outlet and a second area not facing directly to the first air outlet; the electric heater is arranged on the moving assembly, and moves between the first area and the second area along with the moving assembly, so that an airflow blown from the first air outlet switches between a state of passing the electric heater and a state of not passing the electric heater, and is blown out from a second air outlet provided at the housing.