Heating blower and heating device

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Solution Overview

Problem

Conventional blowers face inefficiencies when blowing cold air due to airflow obstruction by the electric heater and require high-temperature-resistant materials, as the airflow path is not switchable between hot and cold modes.

Innovation Solution

A heating blower design with a heating device positioned outside the air duct, featuring a rotary assembly and air deflector that switches the airflow path between passing through an electric heater and not, using a micro switch for automatic heater control, allowing for free switching between hot and cold air modes and reducing material temperature requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the electric heater is disposed inside the air duct, then the airflow can be heated when needed, but the airflow path is blocked when blowing cold air, resulting in small air volume output

Engineering Contradiction:

Improveair heating capabilityVSAvoidair volume output

Core Design Contradiction:

TemperatureVSProductivity

Solution Approach 1:

The patent applies the dynamics principle by making the air deflector rotatable to dynamically switch the airflow path between two modes: (1) passing through the electric heater for heating, and (2) bypassing the electric heater for cold air blowing. The air deflector rotates between first and second positions, enabling the system to adapt its structure according to operational requirements, thus resolving the contradiction between heating capability and air volume output.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent segments the airflow path into two separate channels: one channel directs airflow through the electric heater for heating, while the other channel allows airflow to bypass the heater for cold air blowing. The air deflector acts as a switching mechanism that divides and redirects airflow based on operational mode, enabling independent optimization of both heating and cold air blowing performance.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the electric heater is disposed inside the air duct, then heating function is integrated, but the air duct wall requires high temperature resistance

Engineering Contradiction:

Improveheating function integrationVSAvoidmaterial temperature resistance requirement

Core Design Contradiction:

Adaptability or versatilityVSTemperature

Solution Approach 1:

The patent extracts the electric heater from the air duct interior and relocates it to a position where airflow can be directed through it via the air deflector. This extraction allows the air duct wall to be made of ordinary materials without high temperature resistance requirements, while still maintaining the heating function through the separate airflow path that passes through the heater.

Inventive Principle:

Principle #2Taking out (Extraction)

3Device complexity

If the airflow path is fixed, then the structure is simple, but the blower cannot switch between hot and cold air modes efficiently

Engineering Contradiction:

Improveairflow path structureVSAvoidhot and cold air mode switching

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent introduces a rotatable air deflector that can dynamically change position between a first position (directing airflow through the heater) and a second position (directing airflow to bypass the heater). This dynamic adjustment capability enables efficient switching between hot and cold air modes while maintaining relatively simple structural complexity.

Inventive Principle:

Principle #15Dynamics

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

This design increases air volume output when blowing cold air and reduces the need for high-temperature-resistant materials by allowing separate control of the airflow path, enhancing efficiency and versatility.

Implementation Method 1

the electric heater is arranged in one of the first area and the second area... the airflow passes through the electric heater and is heated thereby

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

a motor and a wind wheel arranged in the air duct... the wind wheel is fixed to a rotating shaft of the motor

Methodology Applied

Scientific EffectElectromagnetic conversion: Electromagnetic Induction

Data Source

PatentUS11466896B2Heating blower and heating device

Publication Date: 2022.10.11 JIANGMEN KEYE ELECTRICAL & MECHANICAL MFG CO LTD

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, a rotary assembly and an air deflector; 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 in one of the first area and the second area; one end of the air deflector is fixedly arranged on the rotary assembly, and the other end of the air deflector rotates with the rotary assembly between the first area and the second area, separating the first area and the second area, so that the first air outlet is communicated with one of the first area and the second area.