Lateral Plate Main Filter Layout for Compact Dust Collectors

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Solution Overview

Problem

Conventional dust collectors have a restricted capacity for collecting dust due to the tubular main filter design, which increases the overall height of the device, making it less compact.

Innovation Solution

A dust collector design featuring a flexible pre-filter and a main filter with a plate shape, where the main filter is folded and held by a holder, and a damper with a plate shape is used between the pre-filter and main filter, with restricting means to prevent close contact during suction, allowing for efficient dust collection without increasing the vertical dimension.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If a tubular main filter is used projecting downward from the main body, then the filter can capture dust, but the top-to-bottom dimension of the dust collector increases

Engineering Contradiction:
Improvedust collection capacityVSAvoidtop-to-bottom dimension
Core Design Contradiction:
Quantity of substanceVSLength of stationary object

Solution Approach 1:

The main filter is changed from a vertical tubular shape to a horizontal plate shape disposed laterally in the tank. This dimensional change allows the filter to occupy horizontal space rather than vertical space, thereby maintaining dust collection capacity while reducing the top-to-bottom dimension of the dust collector

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Quantity of substance

If the tank top-to-bottom dimension is increased to increase dust collection capacity, then more dust can be collected, but the entire dust collector becomes taller

Engineering Contradiction:
Improvedust collection capacityVSAvoidoverall height
Core Design Contradiction:
Quantity of substanceVSLength of stationary object

Solution Approach 1:

The filter assembly is reconfigured to utilize horizontal space within the tank rather than vertical space. The plate-shaped main filter disposed laterally maximizes the use of horizontal dimensions, allowing increased dust collection capacity without increasing the overall height of the dust collector

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 ensures a compact top-to-bottom dimension while maintaining the dust collection capacity by reducing the volume occupied by the filters, allowing for effective dust accumulation without the need for a taller tank.

Implementation Method 1

when the suction fan is rotated by driving the motor, external air is suctioned into the tank via a hose coupled to the suction opening

Methodology Applied
Scientific EffectNegative pressure suction: Pressure Gradient

Implementation Method 2

dust suctioned from a suction opening into a tank is first captured by the pre-filter

Methodology Applied
Scientific EffectPhysical filtration: Filter (physical)

Implementation Method 3

the main filter captures fine dust passing through the pre-filter

Methodology Applied
Scientific EffectPhysical filtration: Filter (physical)

Implementation Method 4

a damper is disposed between the pre-filter and the main filter and elastically deforms by contraction of the pre-filter when the external air is suctioned from the suction opening

Methodology Applied
Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS11134816B2Dust collector
Publication Date: 2021.10.05 MAKITA CORP
  • US11134816B2 patent drawing
  • US11134816B2 patent drawing
  • US11134816B2 patent drawing

AI summary

A dust collector includes a tank, a main body, a suction fan, a flexible pre-filter, and a main filter. The tank includes a suction opening. The main body is fixed to an upper portion of the tank. The suction fan is disposed at the main body. The suction fan is rotated by a motor. The flexible pre-filter is housed in the tank at a lower side of the main body. The pre-filter is positioned at an upstream side of external air suctioned from the suction opening. The main filter is positioned at a downstream side of the pre-filter. The main filter has a plate shape disposed laterally.