Cold-Store Door Leaf Heating and Balanced Winding Structure
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Solution Overview
Problem
Existing door systems for cold stores face issues with ice formation on door components due to inefficient heating, leading to malfunction and unbalanced mass distribution during winding operations, resulting in ineffective heating and potential structural imbalances.
Innovation Solution
Integration of an electrically operated radiant heater directly on the door leaf, preferably parallel to its sides, and a specially designed winding-up shaft with non-cylindrical surfaces to address heating inefficiencies and mass distribution imbalances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If warm air is used to heat the door leaf from the heating device in the upper region, then some heating effect is achieved, but the heat energy is lost as the air passes through the side parts and the heating is insufficient
Solution Approach 1:
The patent extracts the heating function from the upper region heating device and relocates it directly to the door leaf by integrating a heating element into the door leaf structure itself. This allows the door leaf to be heated directly without relying on warm air circulation, eliminating heat energy loss in the air path while maintaining effective heating.
Solution Approach 2:
The patent introduces an intermediary heating element that is integrated into the door leaf structure. This heating element acts as a mediator between the power source and the door leaf, providing direct thermal energy transfer to the door leaf surface, thereby eliminating the need for warm air as an intermediary and reducing energy loss.
2Ease of operation
If the rolling door web is wound up onto the winding-up shaft with a rotationally symmetrical winding surface, then the door can be opened and closed, but unbalances occur due to non-symmetrical mass distribution
Solution Approach 1:
The patent applies asymmetry by designing the winding surface with an offset in the radial direction. Instead of a rotationally symmetrical winding surface, the winding surface is positioned at different radial distances from the axis of rotation at different angular positions. This asymmetric design compensates for the non-symmetrical mass distribution of the wound-up web, maintaining balance during operation.
Solution Approach 2:
The patent changes the geometric parameter of the winding surface by positioning it at varying radial distances from the axis of rotation. This parameter variation allows the winding surface to compensate for mass distribution imbalances, ensuring stable operation while maintaining the door's opening and closing functionality.
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
The radiant heater ensures effective de-icing and heating of the door leaf and surrounding areas, while the non-cylindrical winding surface reduces unbalances during winding operations, enhancing the reliability and functionality of the door system.
Implementation Method 1
having a preferably electrically operated door-leaf-heating device, preferably a radiant heater
Implementation Method 2
radiant heater, which runs at least more or less parallel to the front side and/or rear side of the door leaf and by means of which the door leaf and/or the surroundings of the door leaf can be heated
Data Source
AI summary
A door for closing an opening in a wall, preferably a wall which separates two different temperature zones from one another, in particular one belonging to a cold store, having a door leaf (22), which can be moved in front of the wall opening, and having a heater for heating at least one door component.