Method for producing a heating device, and heating device
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Solution Overview
Problem
Existing methods for manufacturing heating devices that use fans for medium heating, such as propane or butane combustion, face challenges in determining fan speed due to the need for contactless measurement, which is hindered by protective grids, requiring sequential mounting and measurement processes.
Innovation Solution
A method and device where the fan is mounted behind a grid with a recess allowing light signals to pass through for contactless speed determination, enabling simultaneous mounting and measurement, with the grid serving as protection and allowing unhindered light signal passage for speed evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective grid is mounted in front of the fan for safety purposes, then the fan is protected, but the fan speed cannot be measured contactlessly because the grid blocks light signals
Solution Approach 1:
The grid is segmented by creating a recess (opening) in it, allowing light signals to pass through while maintaining the protective function of the grid structure. This segmentation enables simultaneous achievement of protection and measurement capabilities.
Solution Approach 2:
The recess in the grid acts as an intermediary element that allows light signals to pass through the protective barrier. It mediates between the need for protection (grid) and the need for measurement (light signal transmission).
2Reliability
If the fan speed is determined after mounting the grid, then the fan is protected during measurement, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
The recess is created in the grid during grid manufacturing, before the fan is mounted. This preliminary preparation allows the grid to be ready for both protection and measurement functions simultaneously, eliminating the need for sequential operations and improving manufacturing efficiency.
3Measurement precision
If the fan is mounted before the grid for speed determination, then the speed can be measured, but the fan is exposed and unprotected during the measurement process
Solution Approach 1:
The grid with its recess provides both protection and measurement capability simultaneously. The segmentation allows the fan to be protected while still enabling optical measurement through the recess, eliminating the need to choose between protection and measurement.
4Measurement precision
If a recess is created in the grid for light signal passage, then contactless fan speed measurement becomes possible, but the grid structure becomes more complex
Solution Approach 1:
The recess is created only in the specific local area of the grid where measurement is needed, while the rest of the grid maintains its protective function. This localized modification minimizes the impact on overall grid structure and complexity.
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
Enables efficient and accurate fan speed determination during manufacturing, allowing for calibration, adjustment, or replacement based on comparison with set values, ensuring optimal operation and assembly efficiency.
Implementation Method 1
a recess for light signals is present in the grid. The light signals can thus pass in an unhindered manner through the grid for measurement
Implementation Method 2
the speed of the fan in a contactless manner by evaluating a reflection behavior of the fan, at least one light signal being emitted through a recess in the grid in the direction of the fan
Data Source
AI summary
The invention relates to a method of manufacturing a heating device (1) which has a fan (3) located behind a grid (2) in an interior (10). The fan (3) is mounted in the interior (10), and the grid (2) is mounted as a part of the heating device (1). The speed of the fan (3) is determined in a contactless manner by evaluating a reflection behavior of the fan (3) in that a light signal (50) is emitted through a recess (20) in the grid (2) in the direction of the fan (3), and/or is received through a recess (20) in the grid (2) from the direction of the fan (3). Furthermore, the invention relates to a heating device (1).