Soil Compactor Heat Exchanger Tank for Passive Electronics Cooling

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Solution Overview

Problem

Existing soil compaction machines with electric drive systems face challenges in managing heat generated by electrical components due to temperature stress, which affects operational reliability and service life, and conventional air cooling systems are complex and energy-consuming.

Innovation Solution

A soil compaction machine with a heat exchanger fluid tank that uses a heat exchanger fluid, such as water or a water-glycol mixture, to conductively exchange heat with electrical components, eliminating the need for a complex cooling fluid circuit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If air cooling systems are used to cool electrical components, then cooling effect is achieved, but device complexity and energy consumption increase

Engineering Contradiction:
Improveelectrical component temperatureVSAvoidcooling system complexity
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The patent combines the cooling function with the existing machine frame structure. The machine frame is designed to conduct heat away from electrical components, merging the structural support function with the thermal management function, thereby eliminating the need for separate complex cooling systems

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The machine frame itself serves as the heat dissipation pathway. The structure is designed to naturally conduct and dissipate heat from electrical components without requiring external active cooling mechanisms, allowing the system to cool itself through its inherent thermal conduction properties

Inventive Principle:
Principle #25Self-service

2Temperature

If air cooling systems are used to cool electrical components, then cooling effect is achieved, but energy consumption increases

Engineering Contradiction:
Improveelectrical component temperatureVSAvoidcooling energy consumption
Core Design Contradiction:
TemperatureVSUse of energy by moving object

Solution Approach 1:

The machine frame serves as a passive heat sink and thermal conduction pathway, utilizing the natural heat flow from hot to cold regions without requiring external energy input. The thermal management is achieved through the inherent thermal properties of the frame material and its geometric design

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent extracts the active cooling mechanism (fan, coolant circulation) from the system and replaces it with passive thermal conduction through the machine frame, removing the energy-consuming elements while retaining the essential cooling function

Inventive Principle:
Principle #2Taking out (Extraction)

3Object-generated harmful factors

If electrical drive systems are used to power soil compaction machines, then emissions are reduced, but heat generation in electrical components increases

Engineering Contradiction:
ImproveemissionsVSAvoidelectrical component temperature
Core Design Contradiction:
Object-generated harmful factorsVSTemperature

Solution Approach 1:

The thermal management function is merged into the machine frame structure itself. The frame is designed to conduct heat from electrical components through integrated thermal pathways, combining structural support and thermal management into a single unified structure

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The machine frame acts as an intermediary thermal conduction medium between the electrical components (heat source) and the external environment (heat sink). The frame material and its geometric design facilitate efficient heat transfer without requiring additional active cooling components

Inventive Principle:
Principle #24Intermediary (Mediator)

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 system effectively manages heat generated by electrical components, enhancing operational reliability and service life while simplifying the cooling process and reducing energy consumption.

Implementation Method 1

uses a heat exchanger fluid, such as water or a water-glycol mixture, to conductively exchange heat with electrical components

Methodology Applied
Scientific EffectConductive heat exchange: Conduction (thermal)

Data Source

PatentEP4703515A1Soil compacting machine and method for operating a soil compacting machine
Publication Date: 2026.03.04 BOMAG GMBH
  • EP4703515A1 patent drawingFigure 1
  • EP4703515A1 patent drawingFigure 2~3
  • EP4703515A1 patent drawingFigure 4~5

AI summary

The invention relates to a soil compaction machine comprising a machine frame, a soil contact device movably mounted on the machine frame, a vibration excitation device, and an electrical operating component comprising a housing. The invention further relates to a method for operating a soil compaction machine. A heat exchanger fluid tank is provided, with which a conductive heat exchange takes place between the electrical operating component and heat exchanger fluid stored in a storage space of the heat exchanger fluid tank.