Air Control Device for Constant Blower Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
HVLP paint spray systems face challenges in maintaining constant air flow and fan operating point despite variations in air flow volume, leading to inefficient operation, excessive heat, and increased power consumption due to fluctuating back pressure.
Innovation Solution
An air control device with a throttle device and an outlet device, where the opening cross-sections are matched to maintain constant back pressure on the blower, coupled through mechanical, electromechanical, or pneumatic means, allowing synchronous adjustment and placement near the compressed air generator to minimize noise and jet interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the air flow volume supplied to the nozzle is changed, then the paint spraying performance is adjusted, but the back pressure on the blower fluctuates causing inefficient operation and increased power consumption
Solution Approach 1:
The air control device implements a feedback mechanism where the outlet device responds to changes in throttle device opening by automatically adjusting its own opening cross-section. When the throttle device opening is reduced, the outlet device opening increases proportionally, and vice versa, maintaining constant back pressure on the blower and preventing power consumption fluctuations
Solution Approach 2:
The system changes the parameter of outlet device opening cross-section in response to throttle device adjustments. By dynamically modifying the outlet device opening parameter to compensate for throttle device changes, the back pressure parameter remains constant, ensuring stable blower operation across different air flow volumes
2Productivity
If the throttle device opening is reduced to decrease air flow volume, then the paint spraying intensity is reduced, but the back pressure on the blower increases causing excessive heat and inefficient operation
Solution Approach 1:
The outlet device acts as an intermediary element between the throttle device and the blower. It mediates the effect of throttle device opening changes on blower back pressure by providing compensating flow path adjustments, preventing excessive heat generation while allowing productivity adjustment
3Reliability
If a complex electrical adjustment system is used to maintain constant back pressure, then the fan operating point remains stable, but the device complexity increases
Solution Approach 1:
The air control device is self-regulating through the coupled relationship between the throttle device and outlet device. The system automatically maintains constant back pressure without requiring external electrical control systems, microprocessors, or complex sensors, achieving reliability through passive mechanical coupling
Solution Approach 2:
The invention replaces complex electrical control systems with a simple mechanical coupling mechanism. The throttle device and outlet device are mechanically linked such that opening changes in one automatically produce compensating changes in the other, eliminating the need for electrical actuators, control circuits, and software
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
Ensures constant dynamic pressure on the fan, reducing heat and power consumption, and allowing adjustable air flow without complex electrical adjustments, enhancing operational efficiency and user convenience.
Implementation Method 1
the opening cross-sections present in individual positions of the throttle device and the outlet device are matched to one another in such a way that a back pressure generated on the blower remains constant
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a paint spraying system (1) comprising a paint sprayer (2), a compressed air generator (3), a compressed air duct (4) and an air control device (5), wherein the paint sprayer (2) comprises a spray nozzle (9), wherein the compressed air generator (3) comprises a blower (15), wherein the compressed air duct (4) connects the blower to the spray nozzle (9), wherein the air control device (5) comprises a throttle device (18) and wherein the air control device (5) is arranged in the course of the compressed air duct (4).The air control device (5) includes an outlet device (19), wherein a reduction of an opening cross-section (A18) of the throttle device (18) automatically leads to an increase of an opening cross-section (A19) of the outlet device (19) and vice versa, wherein the opening cross-sections (A18, A19) present in individual positions of the throttle device (18) and the outlet device (19) are coordinated such that a dynamic pressure (PS) generated at the blower (15) remains constant in the individual opening positions (A18, A19) of the throttle device (18) and the outlet device (19).