Vacuum device

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Solution Overview

Problem

Existing blower vacuums generate static electricity when collecting leaves, which can damage the control circuit board and cause user discomfort due to static shocks.

Innovation Solution

An airflow device with electrostatic conduction devices to dissipate static electricity to the ground through conductive components, including electrostatic conduction components at the suction pipe ends and a collection device, ensuring static electricity is safely discharged.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the fan rotates to suck leaves, then the leaf collection function is achieved, but static electricity is generated that damages the control circuit board

Engineering Contradiction:

Improveleaf collection capabilityVSAvoidstatic electricity damage to control circuit board

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

A metal wire is introduced as an intermediary conductive element between the fan assembly and the collection device. The wire provides a dedicated electrical conduction path that allows static electricity to be safely discharged to the ground, protecting the control circuit board from damage while maintaining the fan's leaf collection function.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The static electricity generated by the rotating fan, which was previously a harmful factor, is converted into a beneficial discharge path. By providing a controlled conduction route through the metal wire to the collection device and ground, the harmful static charge is transformed into a safe discharge mechanism that protects sensitive electronics.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Productivity

If the fan rotates to collect leaves, then the collection function is achieved, but user discomfort occurs due to static shocks

Engineering Contradiction:

Improveleaf collection capabilityVSAvoiduser comfort during operation

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The metal wire acts as an intermediary that provides a controlled discharge path for static electricity. By routing the static charge through the wire to the collection device and ground, the system prevents uncontrolled static discharge to the user, thereby maintaining operational comfort while preserving the leaf collection function.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The static electricity that causes user discomfort is converted into a beneficial discharge mechanism. The controlled conduction path through the metal wire transforms the harmful static shock experience into a safe, ground-directed discharge process that eliminates user discomfort.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If electrostatic conduction devices are added to ground static electricity, then static electricity is safely discharged, but device complexity increases

Engineering Contradiction:

Improveprotection against static electricityVSAvoidstructure with multiple electrostatic conduction components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The electrostatic conduction function is merged with the existing collection device structure. The metal wire is integrated into the connection between the fan assembly and collection device, combining the mechanical support function with the electrical conduction function. This reduces overall complexity by eliminating the need for separate, dedicated grounding structures.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The collection device is given multiple functions: it serves both as the leaf collection container and as part of the electrostatic discharge path. By making the collection device universally functional (both mechanical collection and electrical conduction), the system reduces the number of separate components needed, thereby reducing overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Prevents damage to the control circuit board and reduces user discomfort by effectively grounding static electricity, enhancing the device's reliability and user experience.

Implementation Method 1

a first electrostatic conduction device, wherein the first electrostatic conduction device includes a first end facing the fan blades and a second end connected to the air blowing port

Methodology Applied

Scientific EffectElectrostatic conduction: Conduction (electrical)

Implementation Method 2

the second end of the third electrostatic conduction device includes at least one tip disposed inside the air blowing port

Methodology Applied

Scientific EffectGrounding: Earthing

Implementation Method 3

the fan blades rub against the sucked object to generate static electricity

Methodology Applied

Scientific EffectTriboelectric effect: Triboelectric Effect

Data Source

PatentEP4609702A1Vacuum device

Publication Date: 2025.09.03 NANJING CHERVON IND

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AI summary

An airflow device includes an electric motor (200); a fan assembly (300) connected to the electric motor (200), where the fan assembly (300) is driven by the electric motor (200) to generate the airflow; and a suction pipe (400) for sucking up a sucked object. The fan assembly (300) includes fan blades. The airflow device further includes a first electrostatic conduction device (500), where the first electrostatic conduction device (500) includes an end facing the fan blades and the other end for conducting static electricity of the airflow device to the ground.