Handheld Paint Sprayer Airflow Layout for Noise and Heat Control
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Solution Overview
Problem
Existing handheld paint sprayers suffer from noise emissions and inefficiencies in airflow design, leading to suboptimal user experience and performance.
Innovation Solution
The handheld paint sprayer features a pressure chamber with a unique airflow arrangement, including a third opening for heat dissipation, a sealing ring to maintain airtightness, and a brushless direct current electric drive, along with a compact blower motor design and sound-insulating intake chamber, to reduce noise and enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the pressure chamber is sealed with only air inlet and air outlet openings, then the pressure chamber maintains airtightness, but heat cannot be dissipated from the control board
Solution Approach 1:
The pressure chamber is divided into functional zones with the control board positioned in a specific area, allowing dedicated heat dissipation pathways to be created without compromising the overall sealing integrity of the chamber
Solution Approach 2:
A sealing ring is introduced as an intermediary element that allows the control board to be mounted on the pressure chamber while maintaining airtightness. The sealing ring creates a barrier that prevents air leakage through the opening required for control board access
2Object-affected harmful factors
If the air inlet and air outlet are arranged in conventional configurations, then the structure is simple, but noise emissions affect the user
Solution Approach 1:
The air inlet and air outlet are positioned asymmetrically on the pressure chamber, with the air inlet at one location and the air outlet at a different position and orientation. This asymmetric arrangement optimizes airflow patterns to reduce noise while maintaining structural simplicity
Solution Approach 2:
The air outlet is oriented to discharge airflow in a direction that minimizes noise impact on the user, utilizing spatial dimensionality to separate the noise source from the user area while maintaining a compact overall structure
3Temperature
If additional openings are added to the pressure chamber for control board access and sealing, then heat dissipation and sealing are improved, but air leakage through the opening occurs
Solution Approach 1:
A flexible sealing ring is used to seal the opening where the control board is mounted on the pressure chamber. The sealing ring can be compressed or deformed to create an airtight barrier around the control board mounting area, preventing air leakage while allowing heat to dissipate through the opening
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 while maintaining performance, ensuring efficient airflow and easy assembly, resulting in a quieter and more efficient painting experience.
Implementation Method 1
a blower motor (7) received in the receiving space (6), the blower motor (7) comprising an electric drive (11) and a blower (12)
Implementation Method 2
the pressure chamber (8) is equipped with a third opening (33), which is arranged, in particular, opposite the first opening (31). This opening allows heat to be dissipated from the control board (17) out of the pressure chamber (8)
Data Source
Figure 1
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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 angle and the air outlet (6b) opens in the direction of the spray head (5).