Electronic Expansion Valve Cooling Ring for Automotive A/C Heat Control
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Solution Overview
Problem
The electronic expansion valve in automobile air-conditioning systems faces challenges in meeting temperature resistance requirements, leading to potential damage and inefficiencies, especially in non-standard operating conditions, and struggles to integrate with variable speed compressors.
Innovation Solution
An automobile air-conditioning system design that includes an electronic expansion valve with a coil fixedly mounted on a valve body, utilizing a heat dissipation bridge and cooling ring for efficient heat transfer, where the coil is enclosed by a cover and integrated with an evaporator via a bracket, enhancing heat transfer efficiency and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the volume of the electronic expansion valve is increased to enhance temperature resistance, then the temperature resistance level is improved, but the cost increases and the application advantages are lost
Solution Approach 1:
A heat dissipation bridge is introduced as an intermediary component between the electronic expansion valve and the evaporator. The heat dissipation bridge conducts heat away from the electronic expansion valve, enabling it to operate at lower temperatures without increasing its volume. This mediator allows the small-volume electronic expansion valve to achieve reliable temperature resistance through active heat management rather than passive size increase.
2Adaptability or versatility
If the electronic expansion valve is used in non-standard working conditions, then the system operates under varying conditions, but the overheat degree deviates from set value causing decreased efficiency and unstable operation
Solution Approach 1:
The system incorporates a temperature sensor that continuously monitors the temperature of the electronic expansion valve and feeds this information back to the control unit. The control unit adjusts the opening degree of the electronic expansion valve based on the detected temperature and other parameters, ensuring stable operation under varying working conditions. This closed-loop feedback mechanism maintains optimal overheat degree control despite environmental variations.
3Ease of manufacture
If the thermal expansion valve is used instead of electronic expansion valve, then the cost is reduced, but the overheat control accuracy and energy saving capability are compromised
Solution Approach 1:
The invention replaces the purely mechanical thermal expansion valve with an electronic expansion valve controlled by electrical signals. The electronic expansion valve uses an electromagnetic motor to precisely control the opening degree based on electronic feedback from temperature sensors and control algorithms. This substitution of mechanical control with electronic control enables accurate overheat management and energy optimization while maintaining cost-effectiveness through efficient component utilization.
4Productivity
If the electronic expansion valve is used with variable speed compressor, then the system efficiency is improved, but the flow adjusting characteristic cannot be combined with frequency conversion characteristic resulting in large power load
Solution Approach 1:
The system dynamically coordinates the opening degree of the electronic expansion valve with the rotation speed of the variable speed compressor through electronic control. As the compressor speed changes, the control unit adjusts the electronic expansion valve opening proportionally to maintain optimal refrigerant flow matching. This dynamic coordination ensures that the flow adjusting characteristic of the electronic expansion valve works in harmony with the frequency conversion characteristic of the variable speed compressor, achieving high system efficiency while minimizing power load through optimized refrigerant circulation.
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 design effectively cools the electronic expansion valve, improves temperature resistance without increasing volume, reduces energy waste, and enhances system stability and structural strength, allowing for efficient operation under various conditions.
Implementation Method 1
the bracket includes a heat dissipation bridge and a cooling ring, the evaporator is arranged at one side of the heat dissipation bridge, the cooling ring is arranged at the other side of the heat dissipation bridge, the heat dissipation bridge and the cooling ring are integrally formed or are fixedly connected, and the coil is arranged in the cooling ring
Implementation Method 2
the evaporator is arranged at one side of the heat dissipation bridge... the coil is arranged in the cooling ring
Data Source
AI summary
An automobile air-conditioning system is provided, which includes an evaporator and an electrical expansion valve in communication via pipes, with the electrical expansion valve including a coil and a valve body, the coil being fixedly mounted on the valve body; the system also includes a support, the support including a heat-sinking bridge and a cooling ring, with the evaporator provided on one side of the heat-sinking bridge and the cooling ring provided on the other side of the heat-sinking bridge; the heat-sinking bridge and the cooling ring are formed in one piece or are connected with each other fixedly, and the coil is provided within the cooling ring. The automobile air-conditioning system has the advantages of a compact structural design, is capable of effectively cooling the electrical expansion valve, and has high system strength, stable transmission of coolant, and high security.