Cab Heating Airflow Reuse in Working Machine Radiator Systems

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Solution Overview

Problem

Existing working machines face inefficiencies in heating the protection mechanism, leading to high power consumption and inadequate heating using internal air or constant heater operation.

Innovation Solution

A working machine with a radiator device for heat exchange, a heater to heat air, and a blower to circulate heated air, combined with a switching mechanism for inside/outside air circulation and cooling/heating modes, along with a thermal fluid heater and electric heater controlled by a controller based on temperature and power level.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If air heated inside the control panel is used to heat the protection mechanism, then heating is achieved without a separate heater, but the heating effect is insufficient

Engineering Contradiction:
Improveheating system simplicityVSAvoidheating effectiveness
Core Design Contradiction:
Ease of manufactureVSTemperature

Solution Approach 1:

The patent combines the control panel heater and protection mechanism heater into a single integrated heating system. The heater is positioned to simultaneously heat air that flows to both the control panel and the protection mechanism interior, allowing one heating element to serve dual purposes and achieve sufficient heating effect for both areas.

Inventive Principle:
Principle #5Merging (Combining)

2Temperature

If the heater device is constantly driven to heat the protection mechanism, then adequate heating is achieved, but power consumption from the battery increases significantly

Engineering Contradiction:
Improveprotection mechanism heatingVSAvoidbattery power consumption
Core Design Contradiction:
TemperatureVSUse of energy by moving object

Solution Approach 1:

The patent creates a multi-functional heating system where a single heater serves multiple purposes: heating the control panel, heating the protection mechanism, and potentially heating the operator's seat area. This eliminates the need for separate heater devices for each area, reducing overall power consumption while maintaining adequate heating across all zones.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The heating system is designed to efficiently utilize the heater's output through optimized air flow paths and positioning. The heater heats air that naturally circulates through the control panel and protection mechanism areas, reducing the need for additional heating elements and minimizing battery power consumption while maintaining effective heating.

Inventive Principle:
Principle #25Self-service

3Temperature

If a separate heater device is added to heat the protection mechanism, then heating effectiveness is improved, but device complexity increases

Engineering Contradiction:
Improveprotection mechanism heatingVSAvoidheating system structure
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The patent merges the control panel heater and protection mechanism heater into a single integrated heater unit. This heater is positioned and configured to heat air that flows to both the control panel and the protection mechanism interior, eliminating the need for separate heater devices and reducing overall system complexity while maintaining effective heating for both areas.

Inventive Principle:
Principle #5Merging (Combining)

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

Efficient heating of the protection mechanism with reduced power consumption by optimizing heater usage based on temperature and power availability, enhancing comfort and operational efficiency.

Implementation Method 1

a radiator device to cool an object to be cooled, the radiator device including a heat exchanger to perform heat exchange between the object and ambient air

Methodology Applied
Scientific EffectHeat exchange: Heat Exchanger

Implementation Method 2

The heater may be operable to be driven by electric power from a storage battery provided in or on the machine body to heat air flowing in the first flow passage

Methodology Applied
Scientific EffectElectric heating: Joule Heating

Implementation Method 3

The working machine may further include an air blower to blow the air heated by the heat exchanger to the inside of the protection mechanism through the first flow passage

Methodology Applied
Scientific EffectForced convection: Forced Convection

Data Source

PatentUS12583281B2Working machine
Publication Date: 2026.03.24 KUBOTA CORP
  • US12583281B2 patent drawing
  • US12583281B2 patent drawing
  • US12583281B2 patent drawing

AI summary

A working machine includes a machine body, a protection mechanism to protect an operator's seat on the machine body, a heater to heat an inside of the protection mechanism, a radiator device to cool an object to be cooled, the radiator device including a heat exchanger to perform heat exchange between the object and ambient air, and a first flow passage to guide air heated by the heat exchanger to the heater and to guide the air further heated by the heater to the inside of the protection mechanism.