Modular Duct Heater with Integrated Shield for Rail Vehicles
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Solution Overview
Problem
The existing air conditioning arrangements in rail vehicles face challenges with suboptimal thermal insulation of air conditioning ducts, leading to temperature loss and increased energy requirements, particularly in limited installation spaces, and the integration of metallic shielding in non-metallic ducts restricts flexibility and requires adaptation to existing geometries.
Innovation Solution
The air conditioning arrangement features a modular duct after-heating device with integrated external metallic shielding, designed as a bent sheet metal with open end faces for air passage, allowing easy installation in both metallic and textile ducts, ensuring effective thermal protection and minimal airflow impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electric duct heating systems are used to compensate for temperature loss, then the temperature of conditioned air is increased, but the surrounding materials require metallic shielding due to high surface temperatures
Solution Approach 1:
The patent combines the metallic shielding function with the duct heating device by integrating the shield as part of the heating unit's housing or mounting structure. This merging eliminates the need for separate shielding components and allows the heating device to be installed in textile ducts without requiring duct interruption or adaptation to existing geometries.
Solution Approach 2:
The heating device with integrated metallic shielding is designed to be universally applicable to both metallic and textile air conditioning ducts. The self-contained shielding structure enables the same heating unit to be installed in any duct type without modification, providing both heating functionality and thermal protection in a single universal device.
2Object-affected harmful factors
If metallic shielding is integrated into the air conditioning duct wall, then thermal protection is provided, but non-metallic ducts must be interrupted and the shielding must be adapted to existing geometries, limiting flexibility
Solution Approach 1:
The metallic shielding is merged with the duct heating device structure, creating a self-contained unit where the shield forms part of the heating assembly's housing or mounting framework. This integration allows the complete heating device with protective shielding to be installed as a single module in any duct type without requiring duct interruption or geometric adaptation.
Solution Approach 2:
The heating device with integrated shielding is designed as a universal solution that can be installed in both metallic and textile ducts without modification. The self-contained shielding structure provides thermal protection while maintaining the duct's integrity and allowing flexible installation in various geometries and locations.
3Loss of energy
If thermal insulation is increased to reduce temperature loss, then energy demand is reduced, but available installation space in modern rail vehicles is limited
Solution Approach 1:
The patent extracts the thermal protection function from the duct insulation system and relocates it to the duct heating device itself through integrated metallic shielding. This extraction allows the heating device to provide its own thermal management without requiring additional insulation space in the already space-constrained rail vehicle environment.
Solution Approach 2:
Instead of providing uniform thermal insulation throughout the entire air conditioning duct system, the patent applies localized thermal protection at the heating device location through integrated metallic shielding. This localized approach provides necessary thermal management where heat is generated without requiring extensive insulation throughout the entire duct network, conserving installation space.
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 enables efficient temperature adjustment of conditioned air and enhances the flexibility and usability of duct post-heating devices by allowing seamless integration into existing ducts, maintaining airflow while protecting adjacent materials with uniform outer contours.
Implementation Method 1
a heating element of the duct afterheating device is arranged inside the climate duct
Implementation Method 2
an outer metallic thermal shield is integrated to protect adjacent building materials from the duct reheating device
Data Source
Figure 1
AI summary
The invention relates to an air conditioning arrangement for a rail vehicle with an air conditioning unit for generating conditioned air and at least one air duct (1) that transports the air conditioned by the air conditioning unit into a passenger compartment of the rail vehicle, wherein the air duct (1) is equipped with an electric duct heating device (3), wherein the duct heating device (3) is designed as a module in which an outer metallic shield (8) is integrated to protect adjacent building materials from the duct heating device (3), and the duct heating device (3) is inserted into the air duct (1).