Preform Heating Oven Standby Control for Energy and Heat Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for placing heat-treatment ovens on standby during temporary production cessation consume excessive energy and risk damaging vulnerable parts due to prolonged high temperatures when heating lamps are left on without preforms.
Innovation Solution
A method involving a two-step process: completely switching off heating lamps during a predetermined duration to allow stored heat to dissipate, followed by switching them on at a moderate intensity to maintain oven temperature, with controlled ventilation to prevent rapid cooling, until production resumes or a maximum duration is exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heating lamps remain switched on during production cessation, then the oven temperature is maintained for rapid restart, but vulnerable parts of the oven are damaged by high temperature
Solution Approach 1:
The standby operation is divided into two distinct phases: a first phase where heating lamps are switched off completely to protect vulnerable parts, and a second phase where heating lamps are switched on at reduced intensity to maintain temperature. This temporal segmentation resolves the contradiction by applying different heating strategies at different times.
Solution Approach 2:
The heating lamp intensity is made dynamic rather than static. The system automatically adjusts the heating lamp intensity based on the phase of standby operation, switching from zero intensity in the first phase to reduced intensity in the second phase, thereby adapting to changing thermal conditions and protecting vulnerable parts while maintaining temperature when needed.
2Object-affected harmful factors
If the heating lamps are switched off completely during standby, then vulnerable parts are protected from overheating, but the oven temperature drops and production restart is delayed
Solution Approach 1:
The standby period is segmented into two phases: initial protection phase with lamps off, and subsequent temperature maintenance phase with lamps at reduced intensity. This segmentation allows the system to first protect vulnerable parts from overheating, then maintain adequate temperature to minimize restart delay.
Solution Approach 2:
The first phase of complete lamp shutdown is performed preliminarily to protect vulnerable parts before the second phase begins. This preliminary protective action prevents damage accumulation, enabling the system to later operate at reduced intensity without risking overheating, thus maintaining temperature efficiently during the standby period.
3Use of energy by moving object
If the intensity of heating lamps is lowered during standby, then energy consumption is reduced, but the oven temperature may drop below the level needed for rapid production restart
Solution Approach 1:
Energy conservation is achieved through segmentation: the first phase with lamps completely off maximizes energy savings during the initial standby period, while the second phase with reduced intensity maintains temperature with minimal additional energy consumption. This segmented approach optimizes the energy-temperature trade-off.
Solution Approach 2:
The heating lamp intensity parameter is changed from full power during operation to reduced power during the second phase of standby. This parameter change enables the system to maintain adequate oven temperature with significantly reduced energy consumption compared to continuous full-power operation.
4Object-affected harmful factors
If ventilation means are activated during standby, then heated air is evacuated and vulnerable parts are cooled effectively, but energy consumption increases
Solution Approach 1:
Ventilation operation is segmented into two phases matching the heating phases: ventilation is deactivated during the first phase when lamps are off to minimize energy consumption, and activated during the second phase when lamps are on at reduced intensity to evacuate heat and cool vulnerable parts. This segmented ventilation strategy resolves the energy-cooling contradiction.
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
Reduces energy consumption while maintaining the oven's internal temperature for rapid restart and preventing damage to vulnerable parts, ensuring efficient standby operation.
Implementation Method 1
at least one heating lamp that is adapted to emit infrared radiation when it is switched on
Implementation Method 2
at least one heat-storage element that is made from a material having a high thermal capacity, the storage element being adapted to be heated by the heating lamp
Data Source
AI summary
A method for placing an oven (12) for heat-treating preforms (13) into standby, including: a device (16) for conveying the preforms (13); at least one heating lamp (22); at least one heat-accumulation element (24, 26); and an electronic unit for controlling the heating lamps (22), characterized in that the method includes, in series: a first switching-off step (E1) which is triggered when a stop in production is determined, and in which the heating lamps (22) are completely switched off; and then a second temperature-maintaining step (E2) which is triggered after the first step (E1), and in which the heating lamps (22) are activated at a predetermined intensity in order to reheat the accumulation elements (24, 26).