Suspended Blower Air Suction Device for Compact HVAC

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Solution Overview

Problem

Conventional motor vehicle air conditioner blower arrangements with vertical blower setups result in high installation height and volume requirements, as well as acoustic issues due to the direction of air inflow and placement of air openings, which complicates compact design and servicing.

Innovation Solution

A compact blower air suction device with a suspended blower installation, where the blower rotor is positioned under the motor, and air inlets are arranged beneath the blower, allowing for a more compact design and improved acoustics by directing air inflow from below and using a swiveling flap for efficient cross-section sealing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the blower is arranged above the blower motor with the air inlet housing above the blower, then the air flow path is straightforward, but the installation height and volume required in the vehicle longitudinal direction increase significantly

Engineering Contradiction:

Improveair flow pathVSAvoidinstallation height

Core Design Contradiction:

Ease of operationVSLength of stationary object

Solution Approach 1:

The patent inverts the conventional arrangement by placing the blower below the blower motor instead of above it. This inversion allows the air inlet housing to be positioned above the blower motor, creating a compact vertical arrangement that reduces installation height while maintaining efficient air flow paths from the openings to the blower inlet.

Inventive Principle:

Principle #13The other way round (Inversion)

2Productivity

If the fresh air opening is arranged at the height of the blower in the front wall, then fresh air can be fed directly, but a fresh air duct and flap system must be arranged requiring high space in the upper front area

Engineering Contradiction:

Improvefresh air feedVSAvoidspace requirement in upper front area

Core Design Contradiction:

ProductivityVSVolume of stationary object

Solution Approach 1:

The patent utilizes the vertical dimension by positioning the blower below the blower motor, allowing the fresh air opening to be arranged in the front wall at a height that aligns with the blower axis. This vertical arrangement eliminates the need for extensive fresh air ducts in the upper front area, as air can flow directly downward to the blower.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Device complexity

If the ambient air opening points backward toward the interior, then the structure is simplified, but a direct sound path from the blower to the passengers is created increasing noise exposure

Engineering Contradiction:

ImprovestructureVSAvoidnoise exposure to passengers

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by directing the ambient air opening downward instead of backward, creating a localized air flow path that draws ambient air from below the vehicle. This directional change blocks the direct sound path from the blower to passengers while maintaining structural simplicity, as the opening is positioned to face away from the passenger compartment.

Inventive Principle:

Principle #3Local quality

4Device complexity

If different directions of inflow are used for fresh air and ambient air positions, then the flap system is simplified, but effects on output efficiency and acoustics occur

Engineering Contradiction:

Improveflap systemVSAvoidblower output efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent implements a dynamic flap system that can pivot between positions to control air flow directions. The flap is positioned to guide both fresh air and ambient air to enter the blower from below, maintaining consistent inflow direction for optimal efficiency while allowing the flap to dynamically adjust between fresh air and ambient air modes.

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 configuration reduces installation space, enhances acoustics by minimizing noise exposure, and facilitates easier servicing through modular housing design, while maintaining efficient airflow and compactness.

Implementation Method 1

a blower with a vertical arrangement consisting of a blower motor (3), a blower rotor (4)

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentUS8940066B2Blower air suction device

Publication Date: 2015.01.27 HANON SYST CO LTD

AI summary

A blower air suction device of a motor vehicle air conditioner includes a blower with a vertical arrangement including a blower motor, a blower rotor, and a blower opening, wherein the blower is ensheathed by a blower scroll, and an air inlet housing with a fresh air opening formed in a front wall and with an ambient air opening. The installation of blower is suspended, that is, with the blower rotor under the blower motor, and the air inlet housing is arranged in the process beneath the blower.