Temperature Control Head With Refrigerant Bypass for Compressor Protection
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Solution Overview
Problem
Conventional temperature control apparatuses for electronic devices face challenges in managing heat generated during high-temperature tests, leading to potential compressor damage due to excessive thermal stress, which limits the controllable temperature range and increases costs.
Innovation Solution
A temperature control apparatus with a refrigerant passage, compressor, temperature sensors, and a control system that bypasses condensed refrigerant to the compressor intake, allowing for precise control of the electric heater and refrigerant flow to maintain the electronic device's temperature and prevent compressor overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the quantity of heat generated from the heater increases to maintain high temperature test, then the temperature control capability is improved, but the temperature of refrigerant supplied to the compressor rises causing thermal stress and potential damage
Solution Approach 1:
A bypass passage is introduced as an intermediary path for refrigerant flow, allowing condensed refrigerant to bypass the compressor intake and go directly to the evaporator. This mediator path prevents hot refrigerant from entering the compressor, thereby protecting the compressor from thermal stress while maintaining the heater's ability to generate sufficient heat for high-temperature testing
Solution Approach 2:
The refrigerant flow path is segmented into multiple pathways: a main path through the compressor and a bypass path that circumvents the compressor intake. This segmentation allows independent control of refrigerant flow through different paths, enabling the system to manage heat load and protect the compressor simultaneously by directing condensed refrigerant through the bypass passage
2Reliability
If the quantity of heat generated from the heater is controlled strictly to protect the compressor, then the compressor reliability is improved, but the temperature controllable range narrows and cost increases
Solution Approach 1:
The system dynamically adjusts refrigerant flow distribution between the compressor path and bypass path based on operating conditions. During high-temperature testing, condensed refrigerant is directed through the bypass passage to protect the compressor, while the heater can operate at full capacity to maintain high temperatures. This dynamic flow control enables wide temperature controllable range without compromising compressor reliability
Solution Approach 2:
The system changes the flow distribution parameter of refrigerant between different paths based on temperature requirements. By adjusting the proportion of refrigerant flowing through the bypass passage versus the compressor, the system can accommodate various temperature testing requirements while maintaining compressor protection, thereby expanding the temperature controllable range
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 effectively manages heat generation during tests, protecting the compressor from thermal stress, widening the controllable temperature range, and reducing the overall cost of the apparatus while ensuring reliable temperature control for various electronic devices.
Implementation Method 1
a temperature control head kept in contact with an electronic device as a testing object thermally
Implementation Method 2
a compressor which compresses refrigerant coming out of the temperature control head
Implementation Method 3
a condenser which condenses refrigerant coming out of the compressor
Data Source
AI summary
A temperature control apparatus including a temperature control head kept in contact with an electronic device as a testing object thermally, an electric heater attached to the temperature control head, a refrigerant passage formed within the temperature control head so as to run through inside thereof, a compressor which compresses refrigerant coming out of the temperature control head, a temperature sensor which detects a temperature of refrigerant on an outlet side of the compressor, a condenser which condenses refrigerant coming out of the compressor, a returning portion which returns refrigerant condensed by the condenser to the temperature control head, and a control portion which bypasses the condensed refrigerant to the intake side of the compressor by a predetermined quantity corresponding to an output of the temperature sensor.