Field Sensor Housing Layout for Passive Heat Dissipation
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Solution Overview
Problem
Existing field devices, particularly radar sensors, face challenges in withstanding high process temperatures without increasing overall length or complexity, as current methods like spacers, insulated housings, and active cooling systems are either bulky, expensive, or energy-intensive.
Innovation Solution
A field device design with a housing that directs heat through a first heat conduction path to a radiating area closer to the process connection, where it is dissipated efficiently, while electronics are located further away, reducing thermal resistance and maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If spacers or distance pieces are used to increase the distance between the process end and electronics, then the temperature protection of electronics is improved, but the overall length of the field device increases considerably
Solution Approach 1:
The housing is divided into a process section and an electronics section by a transverse partition wall, creating distinct thermal zones. The process section contains the process connection and is exposed to high temperatures, while the electronics section houses temperature-sensitive components away from heat sources. This segmentation allows the device to protect electronics from thermal influences without requiring excessive length.
Solution Approach 2:
A transverse partition wall acts as a thermal barrier between the process section and electronics section. This intermediary structure blocks heat transfer from the high-temperature process environment to the electronics, providing thermal protection while maintaining a compact overall device length.
2Temperature
If highly thermally insulated housings with double-walled construction are used, then the temperature protection of electronics is improved, but the housing becomes complex and expensive to manufacture and significantly larger
Solution Approach 1:
The housing is segmented into distinct sections (process section and electronics section) separated by a transverse partition wall. This simpler segmentation approach provides effective thermal protection without requiring complex multi-walled constructions, reducing manufacturing complexity while maintaining temperature protection.
3Temperature
If active cooling systems are incorporated, then the temperature protection of electronics is improved, but the device becomes technically complex and expensive with high energy consumption
Solution Approach 1:
The active cooling system is extracted and replaced with a passive thermal management approach. The transverse partition wall creates a natural thermal barrier that passively blocks heat transfer without requiring active cooling mechanisms, thereby eliminating the complexity and energy consumption associated with active cooling systems.
Solution Approach 2:
The housing structure itself provides thermal protection through its segmented design and partition wall, making the system self-protecting against thermal influences without requiring external active cooling systems. The design uses the inherent thermal properties of the housing materials and structure to protect electronics.
4Temperature
If electronics are positioned very far from the process connection to dissipate heat, then the temperature protection of electronics is improved, but the field device becomes particularly large
Solution Approach 1:
The housing is segmented into compact process and electronics sections arranged in a space-efficient configuration. The transverse partition wall enables effective thermal separation while maintaining a compact overall volume, avoiding the need for excessive device size to achieve adequate heat dissipation.
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 design effectively dissipates heat passively, protecting electronics from high temperatures without increasing device length or complexity, enabling cost-effective and efficient operation in high-temperature environments.
Implementation Method 1
a first heat conduction path from the second end to a radiating area, wherein a path length of the first heat conduction path is shorter than a path length of the second heat conduction path
Implementation Method 2
the radiating area is spaced apart from the electronics and from the first end and the second end
Implementation Method 3
sufficient heat can be dissipated to the environment via the outer wall of the housing outside the process
Data Source
Figure 1
AI summary
The invention relates to a field device with a housing (14), wherein the housing (14) has a first end (16) away from the process and a second end (18) closer to the process, and wherein electronics (20) are arranged in the housing (14) at the first end (16) away from the process, and wherein a sensor element (22) is arranged in the housing (14) at the second end (18) closer to the process, and wherein the housing (14) has a process connection (34) at the second end (18) closer to the process, wherein the field device (10) has a first heat conduction path (A) extending from the second end (18) closer to the process to a radiating area (44) and at least one second heat conduction path (B, B') extending from the second end (18) closer to the process to the electronics (20), wherein the path length of the first heat conduction path (A) is shorter than the path length of the second heat conduction path (B, B') B') and wherein the heat conduction paths (A, B, B') are designed such thatthat the thermal resistance of the first heat conduction path (A) is lower than the thermal resistance of the second heat conduction path (B, B').