Air Conditioner Oil Level Control Using Dual-Height Collection Tubes
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Solution Overview
Problem
Air conditioners face challenges in maintaining a stable oil level within the compressor, which can affect performance and efficiency, as existing systems lack effective mechanisms to adjust and regulate oil levels accurately.
Innovation Solution
The air conditioner incorporates an oil sensor, adjustable electronic expansion valve, and a control unit that manage oil collection and discharge through separate collection tubes to maintain a predetermined oil level by adjusting the opening degree of the oil valve based on detected oil levels and patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single collection tube is used to return oil from the oil separator to the compressor, then the device complexity is reduced, but the oil level within the compressor cannot be maintained at a predetermined level
Solution Approach 1:
The single collection tube is segmented into a first collection tube and a second collection tube with different heights. The first collection tube returns oil when the level is sufficient, while the second collection tube activates when the oil level drops, ensuring continuous oil level maintenance through divided functional segments.
Solution Approach 2:
The system dynamically switches between the first and second collection tubes based on the oil level detected by the oil sensor. The control unit adjusts which tube is active, creating a dynamic response mechanism that adapts to changing oil levels to maintain stability.
2Quantity of substance
If the oil valve opening degree is increased to reduce oil level in the compressor, then the oil level decreases, but the compressor performance may degrade due to insufficient oil
Solution Approach 1:
The oil sensor continuously monitors the oil level in the compressor and provides feedback to the control unit. Based on this feedback, the control unit dynamically adjusts the oil valve opening degree to regulate oil flow, ensuring the oil level remains within the optimal range that maintains compressor performance.
Solution Approach 2:
The system changes the opening degree parameter of the oil valve based on detected oil levels. When oil level is high, the valve opening increases to reduce oil; when oil level is low, the valve opening decreases to conserve oil, dynamically adjusting this parameter to maintain optimal conditions.
3Reliability
If an oil sensor and control system are added to monitor and adjust oil levels, then the oil level stability is improved, but the device complexity increases
Solution Approach 1:
The oil sensor and control unit create a self-regulating system that automatically monitors and adjusts oil levels without external intervention. The system serves itself by detecting oil level changes and autonomously controlling the oil valve to maintain optimal oil levels, eliminating the need for manual monitoring or complex external control mechanisms.
4Measurement precision
If the second collection tube is positioned at a different height than the first collection tube, then the oil level control precision is improved, but the manufacturing complexity increases
Solution Approach 1:
Different portions of the collection tube system are assigned different heights and functions. The first collection tube is positioned for normal oil level collection, while the second collection tube is positioned at a different height to detect and respond to low oil levels, creating local quality variations that enable precise oil level control at specific locations within the system.
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 ensures a stable oil level within the compressor, minimizing performance degradation and optimizing the air conditioner's operation by dynamically adjusting the oil level to maintain efficiency and extend compressor lifespan.
Implementation Method 1
an oil sensor disposed in the compressor to detect oil stored in the compressor
Implementation Method 2
The oil valve comprises an electronic expansion valve of which an opening degree is adjustable
Implementation Method 3
an oil separator to separate the oil from the refrigerant discharged from the compressor
Data Source
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AI summary
Provided is an air conditioner. The air conditioner includes a compressor compressing a refrigerant, an oil sensor disposed in the compressor to detect oil stored in the compressor, an oil separator to separate the oil from the refrigerant discharged from the compressor, a first collection tube to collect the oil separated by the oil separator into the compressor, a second collection tube disposed at a height different from that of the first collection tube, an oil valve disposed in the second collection tube, and a control unit to control the oil valve on the basis of information detected by the oil sensor.