Cooling system with a heat pump function based on an extendable base system and motor vehicle with a cooling system of this type
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Solution Overview
Problem
Existing cooling systems for motor vehicles are complex and inefficient, particularly in achieving energy-efficient operation and post-heating (reheat) modes.
Innovation Solution
A simplified cooling system with a heat pump function, comprising a base system with a refrigerant compressor, external heat exchanger, evaporators, and collectors, which can be connected to a secondary line with a heating register for direct or indirect air heating, allowing for efficient energy use and post-heating operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex cooling system structure is used to achieve energy-efficient operation and post-heating modes, then the system can perform multiple functions, but the device complexity increases
Solution Approach 1:
The cooling system is designed to perform multiple functions including air conditioning, heat pump operation, and post-heating modes using a unified base system with optional secondary lines, allowing the same core components to serve different thermal management needs
Solution Approach 2:
The cooling system is divided into a minimal base system and optional secondary lines that can be selectively activated. The base system includes essential components (compressor, external heat exchanger, evaporators, collectors) while post-heating functionality is added through optional secondary lines with heating registers, allowing incremental complexity
2Loss of energy
If waste heat from electric drive or storage units is utilized for post-heating, then energy efficiency improves, but the system requires additional components for heat recovery
Solution Approach 1:
The system converts waste heat from electric drive or storage units, which would otherwise be lost, into useful heating energy for the vehicle interior through the heat pump function and post-heating modes, transforming an energy loss into a beneficial resource
Solution Approach 2:
The second evaporator (chiller) serves dual purposes: cooling the electric drive or storage unit when needed, and providing waste heat for post-heating operations when cooling demand is low, maximizing resource utilization
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 enables energy-efficient operation, including post-heating, by utilizing waste heat from electric drive or storage units, and maintains a balanced heat balance to meet interior temperature demands without further heating or cooling.
Implementation Method 1
a refrigerant compressor
Implementation Method 2
a directly or indirectly acting external heat exchanger which is arranged downstream of the refrigerant compressor
Implementation Method 3
a first directly or indirectly acting evaporator as part of an air conditioning device for the interior air conditioning of the motor vehicle
Implementation Method 4
a second heat exchanger working as a heat source for direct or indirect air heating, in particular a heating register
Data Source
AI summary
A cooling system with a heat pump function for a motor vehicle is described, includes a base system with a refrigerant compressor. A directly or indirectly working external heat exchanger which is arranged downstream of the refrigerant compressor. A directly or indirectly working first evaporator as part of an air conditioning device for the interior air conditioning of the motor vehicle, arranged down-stream of the external heat exchanger and preceded by a first expansion element. At least one second evaporator as part of a cooling device of an electric drive or storage unit, which evaporator is arranged fluidically parallel to the first evaporator, and which is preceded by a second expansion element. At least one low-pressure side collector arranged downstream of the first and second evaporators, or at least one high-pressure side collector arranged downstream of the external heat exchanger and upstream of the first and second evaporators.