Tri-Zone HVAC Door Strategy for Independent Temperature Control

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Solution Overview

Problem

Current HVAC systems for vehicles face challenges in providing independent temperature control to multiple zones within a passenger compartment without requiring additional heating or cooling devices, leading to inefficiencies in temperature management across different regions.

Innovation Solution

The HVAC system is configured with a conditioning section that includes an evaporator core and a heater core, separated into primary and secondary zones, with door assemblies controlling air flow to allow for independent temperature adjustments in each zone, enabling the delivery of conditioned air to three distinct regions without additional heat exchanging structures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If independent temperature control is provided to multiple zones using additional heating or cooling devices, then temperature control precision is improved, but device complexity and cost increase

Engineering Contradiction:

Improvetemperature control precisionVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent merges the temperature control functions for multiple zones into a single integrated air-handling system with one evaporator core and one heater core. The conditioning section is divided into primary and secondary zones that share common heat exchanging structures, eliminating the need for separate heating or cooling devices in each zone while maintaining independent temperature control capability through door assemblies.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent segments the conditioning section into primary and secondary zones with separate door assemblies (first primary door assembly and secondary door assembly) that can independently control air flow to different zones. This segmentation allows independent temperature control for each zone using a single set of heat exchanging structures, resolving the contradiction between precision and complexity.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If additional heat exchanging structures are installed in each zone, then temperature control independence is improved, but manufacturing cost and device complexity increase

Engineering Contradiction:

Improvetemperature control independenceVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The single evaporator core and heater core in the conditioning section serve multiple zones simultaneously, making these heat exchanging structures universal components that fulfill temperature control needs for both primary and secondary zones. This multi-functionality approach reduces manufacturing costs by eliminating redundant heat exchanging structures while maintaining zone independence through controlled air flow distribution.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The door assemblies act as intermediary components that control and direct air flow between the conditioning section and different zones. These intermediaries enable independent temperature control for each zone without requiring separate heat exchanging structures, as the door assemblies mediate the distribution of conditioned air to achieve zone-specific temperature settings.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If a single air-handling system serves multiple zones, then device complexity is reduced, but temperature control flexibility deteriorates

Engineering Contradiction:

Improvedevice complexityVSAvoidtemperature control flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The door assemblies are designed to be dynamically adjustable, allowing the air flow distribution to each zone to be changed based on temperature requirements. The first primary door assembly and secondary door assembly can independently adjust their positions to control the amount of air directed to different zones, providing flexible temperature control despite using a single static air-handling system structure.

Inventive Principle:

Principle #15Dynamics

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

This configuration allows for independent temperature control of multiple zones within the passenger compartment, enhancing comfort by allowing occupants to select different settings for various regions without the need for additional heating or cooling devices, thereby improving temperature management efficiency.

Implementation Method 1

a conditioning section including an evaporator core and a heater core

Methodology Applied

Scientific EffectHeat exchange: Heat Exchanger

Implementation Method 2

a conditioning section including an evaporator core and a heater core

Methodology Applied

Scientific EffectHeat exchange: Heat Exchanger

Data Source

PatentUS11524549B2Off set tri-zone sliding temperature door strategy

Publication Date: 2022.12.13 HANON SYST CO LTD

AI summary

An air-handling system for a motor vehicle includes a conditioning section having an evaporator core and a heater core. The conditioning section is separated into a primary zone and a secondary zone at a position disposed upstream of the heater core. The heater core extends partially into each of the primary zone and the secondary zone. A primary door assembly is disposed within the conditioning section at a position upstream of the heater core and a secondary door assembly is disposed within the secondary zone of the conditioning section at a position downstream of the primary door and upstream of the heater core.