Vehicle Temperature Controller Dual Circuit Segmentation
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Solution Overview
Problem
In vehicle-mounted temperature controllers, efficient heating is hindered by the cooling water in the low temperature circuit not receiving sufficient heat, leading to excessive cooling of heat generating equipment like PCU or MG, which decreases their performance.
Innovation Solution
A vehicle-mounted temperature controller with a dual heat circuit system, allowing the first heat medium to circulate separately through a radiator and a heat generating equipment heat exchanger, and a circulation mode control device to switch between movement and blocked states based on temperature, ensuring efficient heating without excessive cooling of the equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cooling water flows through only the battery and heat exchanger in the low temperature circuit, then the system structure is simple, but sufficient heat cannot be given to the cooling water and efficient heating is difficult
Solution Approach 1:
The low temperature circuit is segmented into a first partial circuit (battery → heat exchanger → pump) and a second partial circuit (heat generating equipment → pump), allowing the cooling water to flow through different paths depending on operational requirements. This segmentation enables the system to achieve efficient heating by routing cooling water through heat generating equipment when needed, while maintaining structural simplicity through shared components like the heat exchanger and pump.
2Productivity
If the cooling water is made to flow through heat generating equipment to heat the passenger compartment, then heating efficiency improves, but the heat generating equipment is excessively cooled and performance decreases
Solution Approach 1:
The system dynamically switches between different circulation modes using a circulation mode control device that adjusts the flow paths based on real-time temperature conditions. When heating is required and temperatures are appropriate, cooling water is routed through heat generating equipment to maximize heating efficiency. When temperatures indicate risk of excessive cooling, the system automatically switches to protective modes, thereby dynamically optimizing both heating efficiency and equipment reliability.
Solution Approach 2:
The circulation mode control device incorporates temperature sensors and control logic that continuously monitor the temperature of cooling water and heat generating equipment. Based on this feedback, the system automatically adjusts the circulation mode to prevent excessive cooling of heat generating equipment while maintaining efficient heating operation. The feedback mechanism ensures that heating operations are sustained only when temperature conditions are favorable, protecting equipment performance.
3Temperature
If the cooling water temperature becomes extremely low during heating, then heating capacity increases, but the battery and heat generating equipment are excessively cooled causing performance decrease
Solution Approach 1:
The system takes preliminary protective action by monitoring temperature conditions before excessive cooling occurs. The circulation mode control device detects when cooling water temperature is approaching levels that could harm heat generating equipment, and proactively switches to protective circulation modes before damage can occur. This preliminary anti-action prevents the harmful effect of excessive cooling while maintaining the ability to achieve large temperature differences for efficient heating when conditions are favorable.
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 enables efficient heating of the passenger compartment while preventing excessive cooling of the heat generating equipment, maintaining their performance.
Implementation Method 1
This heat exchanger transfers heat from the cooling water of the low temperature circuit to the refrigerant to make the refrigerant of the refrigeration circuit evaporate
Implementation Method 2
a condenser radiating heat to the outside to make the refrigerant condense
Implementation Method 3
the refrigeration circuit being configured to realize a refrigeration cycle by circulation of the refrigerant therethrough
Data Source
AI summary
A vehicle-mounted temperature controller includes a low temperature circuit and a refrigeration circuit. The low temperature circuit has a heat generating equipment heat exchanger exchanging heat with heat generating equipment, a radiator, a first heat exchanger, and a three-way valve. The refrigeration circuit has a second heat exchanger discharging heat from the refrigerant to a high temperature circuit to make the refrigerant condense, and the first heat exchanger making the refrigerant absorb heat from the cooling water to make the refrigerant evaporate. The low temperature circuit includes a first partial circuit through which the cooling water flows through the radiator and the first heat exchanger, and a second partial circuit through which the cooling water flows through the heat generating equipment heat exchanger without passing through the radiator and the first heat exchanger. The cooling water circulates simultaneously and separately at these first partial circuit and second partial circuit.