Vehicle Heat Management Pump Bypass for Air Bubble Faults
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Solution Overview
Problem
Existing heat management systems for electric vehicles face issues with pump malfunction due to foreign matter or air bubbles, leading to abnormal operation and inefficient heat transfer between different temperature zones.
Innovation Solution
A heat management system with a controller that allows the first heat medium to merge with the second heat medium when one of the pumps operates abnormally, using the other pump to circulate the heat medium and resolve the abnormal operation by reversing the flow and pushing out foreign matter or air bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the first heat medium from the first channel and the second channel is allowed to mix in the first heat exchanger, then the heat transfer efficiency is improved, but the temperature control precision deteriorates because heat medium from different temperature zones mixes
Solution Approach 1:
The patent implements dynamic control of the first channel valve and second channel valve based on real-time detection of pump operating status. When the first pump is normal, the first channel valve opens and second channel valve closes; when the first pump fails, the controller switches to open the second channel valve and close the first channel valve. This dynamic valve control allows the system to adaptively select which channel's heat medium flows to the heat exchanger, ensuring continuous operation while maintaining temperature control precision.
Solution Approach 2:
The patent creates a redundant circulation path by having both the first channel and second channel connect to the first heat exchanger, with each channel having its own pump and control valve. This duplicate configuration allows the system to copy the heat medium circulation function through alternative paths when one pump fails, ensuring system reliability and continuous heat transfer efficiency.
2Measurement precision
If the system uses multiple pumps and valves to prevent temperature zone mixing, then the temperature control precision is improved, but the device complexity increases
Solution Approach 1:
The first heat exchanger serves multiple functions: it can receive heat medium from either the first channel or the second channel depending on pump status, and it can also serve as a bypass path for the abnormal pump. The second channel and its pump are designed to serve both as a normal circulation path and as a backup/repair path when the first pump fails. This multi-functionality reduces the need for completely separate systems while maintaining temperature control precision.
Solution Approach 2:
The controller acts as an intermediary that monitors the operating status of both pumps and automatically adjusts the opening/closing of the first channel valve and second channel valve based on pump status. This intelligent mediation simplifies the control logic by using a central decision-making component rather than complex mechanical interlocks, reducing overall system complexity while maintaining precise temperature control.
3Duration of action of moving object
If the pump operates with foreign matter or air bubbles, then the pump continues to run, but the reliability deteriorates due to abnormal operation and potential malfunction
Solution Approach 1:
The controller continuously detects the operating status of the first pump and second pump, and based on this feedback, automatically adjusts the valve configurations. When abnormal operation is detected (such as foreign matter or air bubbles causing malfunction), the controller receives this feedback signal and switches the channel valve states to bypass the abnormal pump, allowing continuous system operation while protecting against reliability deterioration.
Solution Approach 2:
The system预先配置了第二通道和第二泵作为备用路径，并在控制器中预设了泵异常时的阀门切换逻辑。当检测到第一泵异常时，控制器自动打开第二通道阀门并关闭第一通道阀门，使热量介质通过第二通道循环，从而预先准备好应对措施，确保系统连续运行而不因单泵故障而停机。
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 effectively resolves pump malfunctions by allowing the heat management system to continue operating even with abnormal pump conditions, ensuring efficient heat transfer and maintaining system performance.
Implementation Method 1
a first heat exchanger configured to exchange heat between first heat medium for cooling the electrical device and outside air
Implementation Method 2
a second heat exchanger configured to exchange heat between second heat medium for an air conditioner of a cabin and the first heat medium
Data Source
AI summary
A heat management system disclosed herein is used for a vehicle. The heat management system may include an electric device, a first heat exchanger, a second heat exchanger, a first channel, a second channel, a first pump, a second pump, a first channel valve, a second channel valve, a bypass channel, and a controller. The controller may be configured to, when one of the first pump and the second pump operates abnormally, control the first channel valve and the second channel valve such that the flow of the first heat medium from both of the first channel and the second channel to the first heat exchanger is allowed and activate the other of the first pump and the second pump.