Blower Grommet With Plug Member For Airtightness

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Solution Overview

Problem

The use of a single grommet with the maximum number of holes for various blower models can compromise airtightness and blowing efficiency due to unused holes, increasing manufacturing costs and reducing versatility.

Innovation Solution

A blower design that includes a grommet with specific holes for wiring and a plug member to close unused holes, ensuring airtightness and versatility across different blower models.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a grommet with the maximum number of holes is manufactured to share across multiple blower models, then versatility is improved, but airtightness deteriorates due to unused holes

Engineering Contradiction:

Improvegrommet versatilityVSAvoidairtightness

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The grommet is segmented into multiple holes, some of which are closed by plug members and others remain open for wiring insertion. This segmentation allows the same grommet to accommodate different numbers of wires while maintaining airtightness through selective closure of unused holes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Unused holes in the grommet are extracted from the air pathway by inserting plug members, effectively removing them from the functional structure. This ensures that only holes needed for wiring remain open, while unused holes are taken out to maintain airtightness.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If multiple types of grommets are manufactured for different blower models, then airtightness is maintained, but manufacturing cost increases

Engineering Contradiction:

ImproveairtightnessVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

A single grommet design with multiple holes is created to serve multiple blower models. By incorporating plug members that can close unused holes, the same grommet becomes universal across different models, eliminating the need to manufacture multiple grommet types while maintaining airtightness.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If holes in the grommet are left open for future use, then versatility is improved, but blowing efficiency deteriorates due to reduced airtightness

Engineering Contradiction:

Improvefuture expansion capabilityVSAvoidblowing efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

Plug members are pre-installed in the grommet to close unused holes before the blower operates. This preliminary action ensures that the grommet maintains optimal airtightness for current applications while still providing the structural framework for future expansion if needed.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250146499A1Blower

Publication Date: 2025.05.08 SHINANO KENSHI CO LTD

AI summary

A blower includes a case having an opening, an impeller disposed in the case, a motor disposed in the case and configured to drive the impeller, a grommet disposed in the case, a wiring, and a plug member. The grommet includes first and second holes that communicate between an inside and an outside of the case via the opening. The wiring is inserted into the first hole. The plug member closes the second hole.