Constant temperature air circulation system
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Solution Overview
Problem
Existing constant temperature air circulation systems face challenges in achieving energy savings while maintaining temperature stability, as they often require continuous operation of compressors and heaters, and have limited adjustment ranges and accuracy in temperature control.
Innovation Solution
A constant temperature air circulation system incorporating a gas supplementing device, draught fan, cooling and heat exchanging device, heating device, and draught fan state switching device, which allows for adaptive switching of the compressor state based on temperature thresholds, using parallel gas bypasses and air valves to maintain stable air flow and temperature without affecting the compressor's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the compressor is turned off to save energy, then energy consumption is reduced, but temperature stability cannot be ensured
Solution Approach 1:
The system performs preliminary cooling before turning off the compressor, storing cold energy in the constant temperature chamber. This preliminary action ensures that when the compressor is off, the pre-cooled environment maintains temperature stability without requiring continuous compressor operation, thus resolving the contradiction between energy saving and temperature stability.
Solution Approach 2:
The system uses temperature sensors and control units to continuously monitor temperature and provide feedback. When the compressor is turned off, the feedback mechanism detects temperature changes and triggers appropriate responses (such as turning on the compressor or adjusting other components) to maintain temperature stability, thus ensuring stable temperature control while enabling energy-saving compressor shutdown.
2Stability of the object's composition
If the compressor is turned on continuously to ensure temperature stability, then temperature control accuracy is improved, but energy consumption increases
Solution Approach 1:
The system performs preliminary cooling to store cold energy in the constant temperature chamber before turning off the compressor. This allows the system to maintain temperature stability using stored cold energy rather than continuous compressor operation, improving temperature control accuracy while reducing energy consumption.
Solution Approach 2:
The compressor operates periodically rather than continuously, turning on to cool the chamber and then turning off to conserve energy. The control system manages these periodic cycles to maintain temperature stability, thus achieving both energy saving and accurate temperature control through periodic rather than continuous operation.
3Device complexity
If a single heater is used for temperature control, then device complexity is reduced, but temperature adjustment range is limited
Solution Approach 1:
The cooling system is designed to serve multiple functions: it cools the constant temperature chamber, pre-cools supplemented air, and stores cold energy for later use. This multi-functionality allows the system to achieve both cooling and temperature regulation capabilities without adding separate heating devices, thus expanding the temperature adjustment range while maintaining relatively simple device structure.
Solution Approach 2:
The supplemented air acts as an intermediary medium that can be pre-cooled by the cooling system and then introduced into the constant temperature chamber. This intermediary approach allows indirect temperature control and expands the temperature adjustment range without requiring direct heating components inside the chamber, maintaining device simplicity while improving adaptability.
4Stability of the object's composition
If the cooling system operates continuously to maintain temperature, then temperature stability is improved, but energy consumption increases
Solution Approach 1:
The cooling system performs preliminary cooling to store cold energy in the constant temperature chamber and pre-cool supplemented air before the compressor needs to turn off. This preliminary action enables the system to maintain temperature stability using stored cold energy rather than continuous cooling operation, thus improving temperature stability while reducing energy consumption.
Solution Approach 2:
The cooling system maintains continuous useful action by pre-cooling supplemented air that continuously enters the constant temperature chamber. This continuous pre-cooling of incoming air ensures temperature stability without requiring the compressor to run continuously, as the cold pre-cooled air continuously compensates for heat ingress, thus maintaining temperature stability while enabling energy-saving compressor shutdown.
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 long-term energy savings and stable temperature control by adaptively switching the compressor state and adjusting air flow, ensuring consistent air volume and temperature in the constant temperature chamber, even when the compressor is turned off or on.
Implementation Method 1
The cooling and heat exchanging device cools the circulating air
Implementation Method 2
The heating device heats the circulating air
Implementation Method 3
The draught fan provides power for air to circulate among the gas supplementing device, the cooling and heat exchanging device, the heating device, the constant temperature chamber, and the draught fan state switching device
Data Source
AI summary
A constant temperature air circulation system is provided. Air valves are installed behind two three-way nodes of a main circulation loop and parallel bypasses to adjust a flowing amount of gas of each branch. When a compressor keeps a current state unchanged, a draught fan and air valves do not change. When the compressor needs to be turned on and then to be turned off, an air volume of the draught fan is adjusted, and the flowing amounts of the bypasses and a main circuit are simultaneously adjusted until the air valves that control a flowing amount of an evaporator are all closed and the air valves of the bypasses are all opened. Adjustment of the air valves and state switching of the compressor are made at the same time, so that the flowing amount flowing through a heater to a chamber is ensured to always remain unchanged.