Air-conditioning system for an electrically driveable motor vehicle, motor vehicle and method for operating an air-conditioning system
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Solution Overview
Problem
Existing air-conditioning systems for electric vehicles require a separate heater for temperature control of the traction battery, increasing costs and installation space requirements.
Innovation Solution
An air-conditioning system with a heat exchanger that can be controllably connected to the heating circuit, allowing thermal power transfer from the condenser to the HVA circuit, and operating the compressor to increase thermal power for efficient heating of the traction battery and interior compartment, thereby eliminating the need for a separate heater.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate heater is added to the HVA circuit for heating the traction battery, then the heating function is improved, but the device complexity and installation space increase
Solution Approach 1:
The heating circuit is designed to serve multiple functions: it can heat the interior compartment through the condenser and simultaneously heat the traction battery through the heat exchanger. This multi-functional design eliminates the need for a separate heater, reducing component quantity while maintaining heating capability for both the battery and interior space.
2Ease of operation
If a separate heater is added to the HVA circuit for heating the traction battery, then the heating function is improved, but the installation space requirement increases
Solution Approach 1:
The heating function for the traction battery is merged with the existing heating circuit that serves the interior compartment. By combining these functions into a single integrated system using the heat exchanger, the installation space is reduced compared to having separate heating components for the battery and interior.
3Loss of energy
If thermal power is transferred from the condenser to the HVA circuit through the heat exchanger, then energy efficiency is improved, but the system complexity increases
Solution Approach 1:
The heat exchanger acts as an intermediary component that enables thermal power transfer from the heating circuit to the HVA circuit. This intermediary device facilitates efficient energy utilization by capturing waste heat from the condenser and directing it to heat the traction battery, improving energy efficiency while adding only a single intermediate component.
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 solution reduces costs and installation space by utilizing existing heating sources for both the traction battery and interior compartment, while maintaining efficient temperature control and reducing energy losses.
Implementation Method 1
a heat exchanger, which is connected to the HVA circuit and can be connected in a controllable manner to the heating circuit and which is configured for coolant-based transmission of thermal power from the heating circuit into the HVA circuit
Implementation Method 2
an evaporator, for cooling the traction battery, are connected... the evaporator, for absorbing thermal power
Implementation Method 3
a condenser, for releasing thermal power, is connected... the condenser and a compressor are connected
Implementation Method 4
a refrigerant-conducting refrigeration circuit, to which the evaporator, for absorbing thermal power, the condenser and a compressor are connected
Data Source
AI summary
An air-conditioning system for an electrically driveable motor vehicle includes a coolant-conducting HVA circuit to which a traction battery and an evaporator for cooling the traction battery are connected, a coolant-conducting heating circuit for controlling the temperature of an interior compartment of the motor vehicle, to which heating circuit a condenser for releasing thermal power is connected, a coolant-conducting refrigeration circuit, to which the evaporator, the condenser and a compressor are connected, a heat exchanger, which is connected to the HVA circuit and which is controllably connectable to the heating circuit and which is configured for coolant-based transfer of thermal power from the heating circuit into the HVA circuit, and a control device.