Forklift Windshield Heating Control for Condensation
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Solution Overview
Problem
Forklift trucks operating in environments with significant temperature variations experience condensation and wind chill issues, leading to obstructed views and operator discomfort, with conventional solutions like wire mesh inadequately addressing wind chill and heated windshield assemblies increasing costs.
Innovation Solution
A heated windshield system for forklifts that uses sensors to monitor ambient temperature, vehicle speed, and battery voltage to adjust power supply, maintaining a predetermined temperature and preventing condensation through a control circuit with a heating assembly and switching element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a heated windshield assembly with temperature sensors is used, then condensation and fogging are prevented, but vehicle cost increases due to additional components
Solution Approach 1:
The patent implements a self-service control system where the heating assembly automatically regulates its own operation based on predetermined temperature thresholds. The system uses simple thermal feedback without requiring external temperature sensors or complex electronic control, allowing the windshield to self-regulate its heating to prevent condensation while minimizing component complexity and cost.
Solution Approach 2:
The patent extracts the temperature sensing function from separate external sensors and integrates it directly into the heating assembly or windshield structure itself. This integration eliminates the need for additional standalone temperature sensor components, reducing overall system complexity and vehicle cost while maintaining effective condensation prevention.
2Adaptability or versatility
If the forklift truck traverses between cold storage and warm environments, then operational versatility is maintained, but condensation accumulates on the windshield
Solution Approach 1:
The patent implements a dynamic heating control system that automatically adjusts heating based on the temperature differential between the interior and exterior environments. The system activates heating when the truck transitions from cold to warm environments and modulates the heating level according to ambient conditions, preventing condensation accumulation while maintaining operational versatility across different environments.
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
Effectively prevents condensation and wind chill, maintaining clear visibility and operator comfort by dynamically adjusting heating based on environmental and operational parameters, reducing downtime and costs compared to traditional solutions.
Implementation Method 1
A heating assembly is disposed within the windshield member and configured to supply heat to the windshield
Implementation Method 2
The control circuit comprises a temperature sensor for sensing ambient temperatures
Implementation Method 3
a speed sensor for sensing a speed of the forklift vehicle
Implementation Method 4
because the temperature of the cold storage application is commonly less than the dew point of the warmer environment, condensation can accumulate on the windshield
Data Source
AI summary
An open forklift truck is provided having an elongated windshield that protects the operator from wind chills experienced when operating the truck in a cold storage environment. The windshield is a laminate having a plurality of heating elements disposed therein that are electrically connected to a control that monitors speed, battery voltage, temperature, and ambient feedback and adjusts the power supply to the windshield based on this feedback. Accordingly, the windshield is maintained at a predetermined temperature selected to limit condensation and fogging of the windshield.