Segmented PTC Heating Assembly for Fine Power Adjustment

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Solution Overview

Problem

Existing PTC heating assemblies lack the capability for differentiated adjustment of heating power, limiting their adaptability in applications requiring precise temperature control.

Innovation Solution

A PTC heating assembly design with multiple PTC elements connected to different strip conductors on opposite sides, allowing selective energization and control of individual elements for fine-tuned heating power adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple PTC heating assemblies are combined in a heating circuit with uniform control, then the heating power can be adjusted via power transistors, but the adjustment granularity is limited and cannot provide differentiated control for individual elements

Engineering Contradiction:

Improveheating power adjustment capabilityVSAvoidcontrol structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The heating assembly is divided into multiple independently controllable PTC elements (first PTC element, second PTC element, etc.), each connected to separate strip conductors. This segmentation allows individual control of each element through the control device, enabling fine-grained adjustment of heating power by selectively activating or modulating specific elements based on spatial or functional requirements.

Inventive Principle:

Principle #1Segmentation

2Volume of moving object

If PTC elements are arranged one behind the other in receptacles of the frame, then the structure is compact and space-efficient, but the heating power cannot be differentiated adjusted across different regions

Engineering Contradiction:

Improveassembly compactnessVSAvoidheating power differentiation

Core Design Contradiction:

Volume of moving objectVSAdaptability or versatility

Solution Approach 1:

Different regions of the heating assembly are assigned different heating characteristics by providing locally distinct strip conductors (first strip conductor, second strip conductor) that can be independently controlled. This allows specific receptacles or regions to receive differentiated heating power based on local thermal requirements, while maintaining the compact stacked arrangement of PTC elements in frame receptacles.

Inventive Principle:

Principle #3Local quality

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 precise control of heating power from 0 to 100% by selectively switching individual heating circuits, enhancing adaptability and temperature control in space-constrained environments.

Implementation Method 1

The PTC elements are electrically conductively connected to the strip conductors so that the PTC elements can be energized with different polarity

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS12501520B2PTC heating assembly

Publication Date: 2025.12.16 EBERSPACHER CATEM GMBH & CO KG

AI summary

A PTC heating assembly has a plurality of PTC elements and electric strip conductors between which the PTC elements are provided and which are electrically conductively connected to the PTC elements The PTC heating assembly also includes a frame which forms at least one receptacle for the PTC elements and which is provided between the strip conductors. For adjusting the heating power of the PTC heating assembly, at least two strip conductors on at least one side of the PTC elements are electrically conductively connected to PTC elements which deviate from one another.