Coating Device Shaping Air Temperature Control
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Solution Overview
Problem
Existing rotary atomizers fail to provide targeted temperature control of shaping air, leading to fluctuations that impair painting quality by making the applied paint either too dry or too wet, due to thermal influences from the atomizer's operating state.
Innovation Solution
A coating device with a temperature-control device and control unit that maintains a constant shaping air temperature at the outlet of the shaping air nozzle by adjusting heating or cooling based on operating parameters such as driving power, environmental temperature, and volumetric flow, using a heating device, cooling device, and optionally a Peltier element, to compensate for thermal influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shaping air is supplied under pressure to cool the electric motor, then the motor cooling function is improved, but the shaping air temperature drops suddenly causing disruptive condensation water formation
Solution Approach 1:
The shaping air is preheated before being supplied to the electric motor to prevent sudden temperature drop and condensation water formation. The heating device raises the air temperature in advance, so that even after pressure supply and expansion, the temperature remains above the dew point.
Solution Approach 2:
The temperature parameter of the shaping air is actively controlled by adjusting the heating power based on operating conditions. The control unit modifies the heating parameters to maintain optimal temperature, preventing condensation while ensuring effective motor cooling.
2Device complexity
If the shaping air temperature is not controlled, then the device complexity is reduced, but the painting quality deteriorates due to temperature fluctuations affecting paint application
Solution Approach 1:
A control unit continuously monitors the shaping air temperature and adjusts the heating device accordingly. Temperature sensors provide feedback to the control unit, which modulates the heating power to maintain a setpoint temperature, ensuring consistent painting quality regardless of operating state changes.
Solution Approach 2:
The temperature control system automatically regulates itself based on operating conditions. The control unit detects temperature deviations and independently adjusts the heating power without external intervention, maintaining optimal shaping air temperature for consistent paint application.
3Object-affected harmful factors
If preheating of shaping air is applied, then condensation water formation is prevented, but the device complexity increases due to additional heating and control components
Solution Approach 1:
The shaping air heating device serves multiple functions: it prevents condensation water formation, maintains optimal motor cooling efficiency, and ensures consistent painting quality. By integrating these functions into a single system controlled by a unified control unit, the patent reduces overall system complexity despite the added heating capability.
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 a consistent painting quality by maintaining a predetermined shaping air temperature, independent of the atomizer's operating state, preventing fluctuations that would otherwise affect the paint's application.
Implementation Method 1
preheat the supplied shaping air by means of electric heating
Implementation Method 2
cooling device with a settable cooling power
Implementation Method 3
optionally a Peltier element
Data Source
AI summary
Exemplary coating devices and methods are disclosed. An exemplary coating device may include an atomizer for applying a spray jet of a coating means or material to a component, at least one directing air nozzle for outputting shaping or directing air in order to shape the spray jet, and a temperature-control device for controlling the temperature of the directing air. The coating device may further include a control unit which activates the temperature-control device as a function of at least one operating variable of the atomizer in order to set a predetermined directing air temperature.