Handheld Paint Sprayer Airflow Layout for Noise and Assembly
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Solution Overview
Problem
Existing handheld paint sprayers suffer from high noise emissions and complex assembly processes, which affect user experience and efficiency.
Innovation Solution
The handheld paint sprayer features a unique air inlet and outlet arrangement intersecting at approximately right angles, an eccentrically aligned blower motor, a brushless direct current electric drive, and a compact blower design with sound insulation and simplified assembly components, including a pressure chamber with a sealing ring and integrated energy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the air inlet and air outlet are arranged in conventional configurations, then the device structure is simple, but the noise emissions affecting the user are high
Solution Approach 1:
The air inlet and air outlet are arranged asymmetrically at approximately right angles to each other, with the air inlet positioned at the rear and the air outlet at the side. This asymmetric configuration directs exhaust air away from the user's hands and face, significantly reducing noise exposure while maintaining a relatively simple housing structure.
Solution Approach 2:
The air outlet is positioned laterally at the side of the housing rather than at the rear, utilizing the lateral dimension to redirect exhaust airflow. This spatial reconfiguration in another dimension effectively separates the noise source from the user without requiring additional noise control components.
2Productivity
If multiple separate components are used for the blower motor, control board, and mounting structure, then the device is easier to manufacture, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The control board is integrated directly into the blower motor assembly, with the control board mounted on the motor housing. This merging of components eliminates separate mounting steps and reduces the total number of parts, thereby simplifying the assembly process and increasing productivity without significantly complicating the device structure.
Solution Approach 2:
The blower motor housing serves multiple functions: it encloses the motor, mounts the control board, and provides structural integration with the housing. This multi-functionality reduces the need for separate components and simplifies the overall assembly process.
3Ease of manufacture
If the control board is mounted separately from the blower motor, then the control board can be independently replaced, but the assembly process requires additional mounting steps
Solution Approach 1:
The control board is mounted directly on the blower motor housing, integrating it with the motor assembly. This reduces the number of assembly steps by eliminating separate mounting operations while maintaining ease of manufacture through a streamlined integration process.
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 design significantly reduces noise emissions and simplifies assembly, enhancing user experience and operational efficiency while maintaining performance.
Implementation Method 1
a blower motor (7) received in the receiving space (6), wherein the blower motor (7) comprises an electric drive (11) and a blower (12)
Implementation Method 2
the blower motor (7) comprises an electric drive (11) and a blower (12), in particular a brushless direct current electric drive
Data Source
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AI summary
The invention relates to a hand-held paint sprayer (1), which comprises a housing (3) having a handle (4), a spray head (5) and a fan motor (7), and the paint sprayer (1) also comprises a receiving chamber (6) for the fan motor (7) and the receiving chamber (6) has an air inlet (6a) and an air outlet (6b). The receiving room (6) is designed such that a first plane (E1), in which a cross-sectional area of the air inlet (6a) is located, and a second plane (E2), in which a cross-sectional area of the air outlet (6b) is located, intersect approximately at a right right angle and the air outlet (6b) opens in the direction of the spray head (5).