Air Conditioner Injection Module for Dual-Pressure Refrigerant Control
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Solution Overview
Problem
Existing air conditioners face inefficiencies in refrigerant injection into compressors, particularly in selectively or simultaneously injecting refrigerant into both high and low pressure sides, which affects performance and efficiency.
Innovation Solution
An air conditioner design incorporating an injection module that selectively or simultaneously injects refrigerant into the high and low pressure sides of the compressor, utilizing an injection expansion valve, injection heat exchanger, high and low pressure injection valves, and a controller to manage the injection based on compression ratio, enhancing refrigerant flow and compressor efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If refrigerant is injected into the compressor to enhance efficiency, then compressor performance is improved, but the ability to selectively inject into high and low pressure sides is limited
Solution Approach 1:
The injection system is segmented into separate high-pressure injection valve and low-pressure injection valve, allowing independent control of refrigerant injection into different pressure sides of the compressor. This segmentation enables selective injection based on operating conditions while maintaining improved compressor efficiency.
Solution Approach 2:
The injection system dynamically adapts by selectively opening or closing the high-pressure and low-pressure injection valves based on real-time operating conditions. The controller adjusts which valve is active to optimize compressor efficiency under varying load and temperature conditions.
2Device complexity
If a simple injection system is used, then device complexity is reduced, but the ability to control injection based on compression ratio is lost
Solution Approach 1:
The controller receives feedback on compression ratio and other operating parameters, then automatically controls the injection valves accordingly. This feedback mechanism enables automated injection control without requiring overly complex mechanical systems.
Solution Approach 2:
The controller acts as an intermediary between the injection valves and the compressor, managing the complexity of selective injection control through electronic control rather than complex mechanical linkages. This reduces overall system complexity while maintaining automation capability.
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 allows for optimized refrigerant injection, improving compressor performance and efficiency by controlling the injection process based on compression ratio, thereby enhancing the overall operation of the air conditioner.
Implementation Method 1
injection heat exchanger, through which the refrigerant condensed at the condenser flows
Implementation Method 2
injection expansion valve to expand a first portion of the refrigerant condensed at the condenser
Data Source
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AI summary
An air conditioner and a method for controlling an air conditioner are provided that efficiently inject a refrigerant into a compressor. The air conditioner may include a compressor to compress a refrigerant; a condenser to condense the refrigerant compressed at the compressor; an evaporator to evaporate the refrigerant condensed at the condenser; and an injection module to selectively or simultaneously inject some or a portion of the refrigerant flowing from the condenser to the evaporator into a high pressure side and a low pressure side of the compressor.