Evaporator Heat Exchanger Layout for Thermal Isolation and Compact Packaging
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Solution Overview
Problem
Existing heating cooling modules for motor vehicles face challenges in minimizing undesirable heat transfers and optimizing space and cost, particularly due to the integration of components with different temperatures in a closed unit.
Innovation Solution
The configuration of a heating cooling module with an evaporator heat exchanger unit that includes a collector expansion tank, evaporator, and expansion element housed within a two-part housing, where the evaporator is arranged to surround the collector expansion tank, minimizing heat transfer between components and allowing for a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If components with different temperatures (condenser, evaporator, internal heat exchanger) are integrated into a closed unit, then assembly costs are reduced and tube length is minimized, but undesirable heat transfers increase
Solution Approach 1:
The heat exchanger unit is divided into temperature zones: a first housing part containing warm components (condenser, internal heat exchanger) and a second housing part containing cold components (evaporator, collector expansion tank), separated by a thermal insulation element to prevent undesirable heat transfers while maintaining integrated assembly benefits
Solution Approach 2:
A thermal insulation element is introduced as an intermediary between components with different temperatures, specifically between the warm condenser and cold evaporator, to eliminate harmful thermal interactions while preserving the compact integrated structure
2Ease of manufacture
If components are integrated into a closed unit, then assembly costs are reduced, but the module dimensions may increase due to space requirements for temperature-separated components
Solution Approach 1:
The collector expansion tank is positioned centrally within the housing, with the evaporator arranged around it in a nested configuration, maximizing space utilization and reducing overall module volume while maintaining all necessary components in an integrated unit
3Volume of moving object
If the evaporator is arranged to surround the collector expansion tank, then space is optimized and heat transfer is minimized, but manufacturing complexity increases
Solution Approach 1:
The housing structure serves multiple functions simultaneously: it provides the structural enclosure, acts as a thermal barrier through insulation integration, defines the temperature zones, and facilitates the nested arrangement of components, thereby reducing overall manufacturing complexity despite the sophisticated internal configuration
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 reduces undesirable heat transfers, enables smaller module dimensions, and provides cost and space advantages while maintaining effective temperature control for the vehicle's interior and components.
Implementation Method 1
an evaporator, which transforms at least a part of the refrigerant into a gaseous state
Implementation Method 2
in the evaporator heat is supplied to the refrigerant. By these heat transfers, a temperature control of the interior chamber
Implementation Method 3
an expansion element is arranged, by which the refrigerant is supplied to the evaporator
Implementation Method 4
at least a collector expansion tank for collecting a refrigerant
Implementation Method 5
suitable components can be combined into one unit... minimize undesirable heat transfers
Data Source
AI summary
An evaporator heat exchanger unit for a heating cooling module for a motor vehicle is disclosed. In one aspect, the evaporator heat exchanger unit includes at least one collector expansion tank for collecting a refrigerant and one evaporator, by which at least a part of the refrigerant can be converted into gaseous form. The evaporator heat exchanger unit also includes a housing enclosing an inner chamber, wherein in the inner chamber, the collector expansion tank, the evaporator, and a cooling medium are arranged, and wherein an expansion organ is arranged on the housing, by which the refrigerant is supplied to the evaporator.