Heating device and electric vehicle

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Solution Overview

Problem

The ceramic heater unit experiences warpage or expansion when generating heat, causing fluctuations in the width of the heat medium passage.

Innovation Solution

A heating device configuration that includes a heater, upper and lower surface-side members, and spacers, with an elastic member pressing these members towards the heater to maintain a consistent passage width despite warpage or expansion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the heater generates heat, then heating function is achieved, but warpage or expansion occurs causing passage width fluctuation

Engineering Contradiction:

Improveheating functionVSAvoidpassage width consistency

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The patent introduces an elastic member that changes its physical state (compresses) in response to temperature changes, allowing the passage width to be dynamically adjusted to compensate for heater expansion and maintain consistent flow characteristics

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The elastic member is pre-configured to exert a pressing force on the upper surface-side member, creating a preliminary counteracting force that compensates for the expected expansion of the heater when it generates heat, thereby maintaining passage width consistency

Inventive Principle:

Principle #9Preliminary anti-action

2Manufacturing precision

If spacers are used to secure passage width, then passage width stability improves, but device complexity increases

Engineering Contradiction:

Improvepassage width stabilityVSAvoidstructure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent combines the spacer function with the elastic member into a single integrated component, allowing the elastic member to simultaneously serve as both the pressing mechanism and the passage width maintaining element, thereby reducing overall device complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The elastic member performs multiple functions: it acts as a spacer to maintain passage width, provides elastic pressing force to compensate for heater expansion, and serves as a mechanical element to maintain structural integrity, thereby reducing the need for separate dedicated components

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 configuration effectively suppresses fluctuations in the heat medium passage width, ensuring stable heat transfer and improved temperature control in applications such as electric vehicles.

Implementation Method 1

an elastic member pressing the upper surface-side member or the lower surface-side member toward the heater

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

warpage or expansion of the ceramic heater may occur when the ceramic heater generates heat

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS20250065687A1Heating device and electric vehicle

Publication Date: 2025.02.27 AISAN IND CO LTD

AI summary

A heating device may include: a heater; an upper surface-side member facing an upper surface of the heater; and a lower surface-side member facing a lower surface of the heater; and an upper surface-side passage defined between the heater upper surface and the upper surface-side member; and a lower surface-side passage defined between the heater lower surface and the lower surface-side member; and a first spacer disposed between the heater upper surface and the upper surface-side member to secure a space between the heater upper surface and the upper surface-side member; and the upper surface-side member; and a second spacer disposed between the heater lower surface and the lower surface-side member to secure a space between the heater lower surface and the lower surface-side member; and an elastic member pressing the upper surface-side member or the lower surface-side member toward the heater.