Mobile Heating Device Fuel Line Partial Emptying

The emptying device is designed to perform partial emptying of the fuel supply line rather than complete emptying. It removes excess fuel that would cause evaporative emissions and unpleasant smells, while deliberately leaving a controlled amount of fuel in the line. This partial action resolves the contradiction by preventing harmful emissions without requiring complete refilling and reheating during restart, thus avoiding restart delays and smoke development.

The emptying device incorporates a feedback mechanism through its check valve design that monitors the fuel emptying process. When the fuel level drops to an appropriate level, the check valve automatically closes to prevent complete emptying and uncontrolled flow. This feedback control ensures that the fuel line maintains a stable, defined state with sufficient fuel for reliable operation while preventing excess fuel that would cause unpleasant smells and evaporative emissions.

The system utilizes the existing combustion process to heat and burn off residual fuel in the supply line during shutdown, rather than introducing a separate heating coil system. The combustion chamber's heat and flame naturally heat the fuel line and vaporize remaining fuel, which then burns off cleanly. This self-service approach reduces smoke development without increasing device complexity, as it leverages the system's own operational resources.