Electric heating device
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Solution Overview
Problem
Existing electric heating devices face challenges in securely and reliably accommodating temperature sensors, particularly due to vibrations that can cause loose connections.
Innovation Solution
The electric heating device incorporates a temperature sensor that is accommodated in a sealed and sliding manner within a temperature sensor receptacle, with a support mechanism preventing the sensor from sliding out, ensuring a secure and sealed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the temperature sensor is accommodated in a sliding manner in the temperature sensor receptacle, then the temperature sensor can be easily installed and removed, but the temperature sensor may slide out due to vibrations
Solution Approach 1:
A support element is introduced as an intermediary component between the temperature sensor and the temperature sensor receptacle. This support element prevents the temperature sensor from sliding out due to vibrations while still allowing for easy installation and removal. The support element acts as a mediator that resolves the contradiction between ease of operation and position stability.
2Measurement precision
If the temperature sensor receptacle is formed in the partition wall, then the temperature sensor can be positioned to measure temperature accurately, but the sealing may be compromised
Solution Approach 1:
A sealing element (such as an O-ring or gasket) is used to maintain the sealing integrity of the heating chamber while allowing the temperature sensor receptacle to be formed in the partition wall. The sealing element compensates for any gaps or irregularities in the receptacle formation, ensuring both accurate temperature measurement and reliable sealing.
3Loss of energy
If the temperature sensor is sealed in the temperature sensor receptacle, then heat loss is prevented, but the temperature sensor may become difficult to access for replacement
Solution Approach 1:
The temperature sensor assembly is segmented into separate components: the temperature sensor itself, the support element, and the temperature sensor receptacle. This segmentation allows the temperature sensor to be sealed within the receptacle for heat loss prevention, while still enabling easy removal and replacement by detaching the support element and extracting the sensor from the receptacle.
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 ensures that the temperature sensor remains securely and sealedly positioned within the heating device, even under conditions of vibration, thereby maintaining accurate temperature measurements and preventing heat loss.
Implementation Method 1
PTC heating device protrudes from the housing as a heating fin in a direction toward the heating chamber. The PTC heating device comprises at least one PTC element and conductor tracks for energizing the PTC element with different polarity.
Implementation Method 2
A temperature sensor is connected, in terms of data, to a control device. The temperature sensor is accommodated in a sealed and sliding manner in a temperature sensor receptacle which is formed in a wall delimiting the heating chamber.
Implementation Method 3
The housing has a partition wall which separates a connection chamber from a heating chamber for dissipating heat.
Data Source
AI summary
An electric heating device comprises a housing with a partition wall which separates a connection chamber from a heating chamber for dissipating heat and from which at least one PTC heating device protrudes as a heating fin in the direction toward the heating chamber. The PTC heating device comprises at least one PTC element electrically connected to conductor tracks in the connection chamber. A temperature sensor is connected, in terms of data, to a control device and is accommodated in a sealed manner in a temperature sensor receptacle which is formed in a wall delimiting the heating chamber. The temperature sensor is accommodated in a sliding manner in the temperature sensor receptacle. A support prevents the temperature sensor from sliding out of the temperature sensor receptacle and/or directly plugs a temperature sensor contact element of the temperature sensor in the connection chamber into a printed circuit board.