Slit Intake With Accumulation Recess for Uniform Precoat Distribution
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Solution Overview
Problem
Conventional filter devices and painting booths face issues with uneven distribution of precoat agents due to the arrangement of precoat agent nozzles, leading to poor precoat layer formation and increased manufacturing costs, as multiple nozzles are required at small intervals to achieve uniform distribution.
Innovation Solution
The introduction of a slit-like or rectangular intake opening with an accumulation recess in the filter device casing, where the precoat agent nozzle ejects the precoat agent and carrier gas into the recess, allowing for whirl-like accumulation and dispersion along the intake opening's width direction, reducing the need for multiple nozzles and enhancing uniform distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple precoat agent nozzles are arranged at small intervals to achieve uniform distribution, then the uniformity of precoat agent distribution is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent introduces an accumulation recess that extends in the width direction (third dimension) of the intake opening, transforming a one-dimensional nozzle arrangement problem into a three-dimensional space utilization solution. The recess allows the single nozzle to distribute precoat agent across the width direction through lateral accumulation and flow, eliminating the need for multiple nozzles arranged in the longitudinal direction.
Solution Approach 2:
The accumulation recess acts as an intermediary structure between the precoat agent nozzle and the target gas flow. It receives the precoat agent from the nozzle, accumulates it laterally, and then releases it into the gas stream, mediating the distribution process to achieve uniform coverage without requiring multiple direct injection points.
2Ease of manufacture
If a simple circular or rectangular opening is used as the intake opening, then the ease of manufacture is improved, but the uniform distribution of precoat agent deteriorates
Solution Approach 1:
The patent segments the intake opening into two functional parts: a simple rectangular opening for ease of manufacture and an accumulation recess added to it for improved distribution. This segmentation allows the base structure to remain simple while the added recess component provides the functional enhancement needed for uniform precoat agent distribution.
Solution Approach 2:
The accumulation recess performs preliminary action by pre-accumulating and laterally distributing the precoat agent before it enters the main gas flow. This preliminary distribution action ensures uniform mixing occurs upstream, preventing the need for complex nozzle arrangements downstream.
3Ease of operation
If the precoat agent nozzle is arranged in the interior of the device casing near the intake opening, then the ease of operation is improved, but the uniform distribution of precoat agent deteriorates
Solution Approach 1:
The patent moves the distribution function from the longitudinal direction (where nozzle positioning affects uniformity) to the width direction (through the accumulation recess). This dimensional shift allows the nozzle to be positioned for ease of operation while the recess handles the uniform distribution across the width.
4Manufacturing precision
If numerous precoat agent nozzles are arranged at small intervals, then the uniformity of precoat agent distribution is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges the functions of multiple nozzles into a single nozzle system assisted by an accumulation recess. The recess combines lateral accumulation, lateral distribution, and mixing functions that would otherwise require multiple separate nozzle units, thereby reducing component count and manufacturing cost while maintaining uniformity.
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 solution ensures uniform distribution of the precoat agent across the intake opening, reducing the number of nozzles required and simplifying the device structure, while maintaining effective precoat layer formation and preventing viscous matter attachment, thus lowering manufacturing costs and improving filter performance.
Implementation Method 1
A precoat agent nozzle is provided in the intake opening for ejecting a powder-type precoat agent for the filter along with carrier gas to the target gas flowing into the device casing from the intake opening
Implementation Method 2
the ejected carrier gas produces whirl-like accumulation in the accumulation recess, thereby the precoat agent is dispersed along the width direction of the intake opening
Implementation Method 3
a filter housed in the device casing, and an intake opening provided in the device casing for a target gas containing a viscous matter to be captured such as paint mist and oil mist
Data Source
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AI summary
A filtering apparatus provides a uniformly distributed precoating agent (P) in a gas (EA) being processed and directed to a filter (8). To this end, the filtering apparatus (5) is provided with a flow inlet portion (10) which extends horizontally in the direction of width in a slit-like or rectangular shape. The flow inlet portion (10) has an upper rim portion in which a recessed retention portion (12) is formed to open downward when viewed in the longitudinal direction of the flow inlet portion (10). The recessed retention portion (12) is formed continuously in the longitudinal direction of the flow inlet portion (10). The flow inlet portion (10) is also provided, at a predetermined position in the longitudinal direction thereof, with a precoating agent nozzle (11), allowing the precoating agent (P) and a gas to issue through the precoating agent nozzle (11) in a jet toward the surface deep inside the recessed retention portion (12).