Cooling machine
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Solution Overview
Problem
In absorption cooling machines, particularly double-utility and triple-utility systems, the pressure difference between regenerators causes backflow of absorbent, leading to inefficient collection, increased water levels in regenerators, and contamination of refrigerant pipes, reducing overall efficiency and shortening the machine's lifespan.
Innovation Solution
A bypass collection pipe is introduced to redirect backflowing absorbent from the second regenerator to the absorber, connected with a bypass decompression device, and feedback mechanisms like valves and pumps are used to manage water levels, ensuring selective operation during abnormal circulation, and a drain pipe is connected to manage rising water levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If absorbent is collected from multiple regenerators through convergence of flows, then collection efficiency should improve, but pressure difference causes backflow to low-pressure regenerator reducing collection efficiency
Solution Approach 1:
The absorbent collection system is segmented into multiple independent collection paths: a first collection path for high-pressure regenerator absorbent and a second collection path for low-pressure regenerator absorbent. This segmentation prevents pressure interference between different regenerator outputs while maintaining efficient collection from all sources.
Solution Approach 2:
A decompression device is introduced as an intermediary component in the first collection path to mediate the pressure difference between high-pressure and low-pressure regenerator outputs. This intermediary equalizes pressures before convergence, eliminating backflow while maintaining collection efficiency.
2Quantity of substance
If absorbent flows back to low-pressure regenerator, then water level in regenerator increases, but this causes contamination of refrigerant pipe and reduces machine lifespan
Solution Approach 1:
The bypass collection pipe provides a preliminary alternative path for absorbent flow before backflow can occur into the low-pressure regenerator. By offering this anti-action path, the system prevents the harmful backflow effect from happening in the first place, protecting the refrigerant pipe from contamination.
Solution Approach 2:
A feedback mechanism using a water level sensor and control valve monitors and regulates absorbent flow into the low-pressure regenerator. When water level approaches a critical threshold, the feedback system automatically restricts further absorbent entry, preventing overflow and subsequent refrigerant pipe contamination.
3Reliability
If bypass collection pipe is added to redirect backflow, then absorbent collection reliability improves, but device complexity increases
Solution Approach 1:
The problematic backflow path is extracted and replaced with a dedicated bypass collection pipe that directly routes absorbent from the high-pressure regenerator to the absorber. This extraction eliminates the need for complex active control mechanisms while maintaining reliability through a simple, passive structural solution.
4Measurement precision
If feedback devices like valves and pumps are used to manage water levels, then water level control precision improves, but device complexity and operation difficulty increase
Solution Approach 1:
The system employs passive flow control mechanisms where the decompression device automatically equalizes pressures and the bypass pipe naturally redirects flows based on pressure differentials. This self-service approach achieves effective water level control without requiring complex active feedback devices, reducing operational complexity while maintaining precision.
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 prevents absorbent backflow into the regenerator, maintains efficient circulation, and prevents refrigerant pipe contamination, thereby enhancing the cooling machine's efficiency and extending its lifespan by ensuring proper absorbent collection and managing water levels.
Implementation Method 1
a bypass decompression device that reduces a pressure of the absorbent flowing through the bypass collection pipe
Implementation Method 2
an absorber that dissolves the refrigerant into the absorbent to make an absorption solution
Implementation Method 3
a regenerator that heats the absorption solution supplied from the absorber to separate into a liquid absorbent and a gas state refrigerant
Implementation Method 4
a condenser that heat exchanges the gas state refrigerant introduced from the regenerator into a liquid state
Implementation Method 5
an evaporator that evaporates the refrigerant introduced from the expansion device by heat exchange with cold water, and then introduces again into the absorber
Data Source
AI summary
The present disclosure relates to an absorption cooling machine including an absorber, a first regenerator, a second regenerator, a condenser, an expansion device, and an evaporator, and relates to a cooling machine that connects a bypass collection pipe that guides an absorbent flowing back into the second regenerator to be collected into an absorber to a second collection pipe, in order to prevent the water level of the second regenerator from being raised as the absorbent cannot be collected by the absorber and flows back to the second regenerator, due to the pressure difference between an absorbent separated from the first regenerator and collected into the absorber through the first collection pipe, and an absorbent separated from the second regenerator and collected into the absorber through the second collection pipe.