Vapor Injection Compressor Mode Switching for Quiet Extreme-Temperature HVAC
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Solution Overview
Problem
Conventional air conditioners face limitations due to single-rotor compressors causing vibration and noise, and double-rotor compressors result in poor performance and energy inefficiency, especially at high and low temperature extremes.
Innovation Solution
An air conditioning system with an enhanced vapor injection compressor that can switch between single-rotor and double-rotor operation modes, utilizing direction switching assemblies and throttling elements to optimize power output and energy efficiency across varying temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-rotor compressor is used, then the cost is reduced, but vibration and noise increase significantly
Solution Approach 1:
The compressor is divided into two independent rotors (first rotor and second rotor) that can operate independently or together. Each rotor has its own driving mechanism, allowing the system to segment the compression function into separate units that balance cost and vibration characteristics.
Solution Approach 2:
The compressor dynamically switches between single-rotor mode (one rotor operating alone) and double-rotor mode (both rotors operating together) based on temperature conditions and load requirements, optimizing the balance between cost efficiency and vibration control.
2Object-generated harmful factors
If a double-rotor compressor is used, then vibration and noise are reduced, but performance degrades at high and low temperature extremes
Solution Approach 1:
The system dynamically selects between single-rotor and double-rotor operation modes based on ambient temperature and load conditions. At extreme temperatures, one rotor is activated to provide the necessary compression capacity, while in moderate conditions, both rotors operate together to reduce vibration and noise.
Solution Approach 2:
The compressor adjusts its operating parameters (which rotor(s) are active, refrigerant flow distribution) based on temperature conditions, allowing optimal performance across different environmental extremes while maintaining vibration control.
3Object-generated harmful factors
If the maximum operating frequency is limited due to noise, then noise is controlled, but the maximum capacity cannot be reached
Solution Approach 1:
The compression capacity is segmented across two rotors, allowing the system to distribute the workload. When maximum capacity is needed, both rotors operate at lower individual frequencies to maintain noise control while achieving high total capacity through parallel operation.
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
The system achieves high power output and energy efficiency with reduced vibration by switching between operation modes based on temperature conditions, improving refrigeration and heating speeds while maintaining stability and comfort.
Implementation Method 1
a flash evaporator (6)... The flash evaporator has a gaseous refrigerant outlet, a first port and a second port
Implementation Method 2
The first heat exchanger has a first end connected with the second valve port and a second end, and the second heat exchanger has a first end connected with the third valve port and a second end
Implementation Method 3
a first throttling element is connected in series between the first port and the first heat exchanger, a second throttling element is connected in series between the second port and the second heat exchanger
Data Source
AI summary
An air conditioning system and a method for controlling the same are provided. The air conditioning system includes an enhanced vapor injection compressor, first and second direction switching assemblies, first and second heat exchangers and a flash evaporator. The enhanced vapor injection compressor has a gaseous refrigerant discharge port, a gaseous refrigerant supplement port, first and second gaseous refrigerant suction ports, and a gaseous refrigerant return port. Pressure in a sliding vane chamber of a gaseous refrigerant cylinder corresponding to the second gaseous refrigerant suction port is equal to a discharge pressure at the gaseous refrigerant discharge port. A first pipe port of the first direction switching assembly is connected with the second gaseous refrigerant suction port, a second pipe port thereof is connected with the gaseous refrigerant discharge port and a third pipe port thereof is connected with the liquid accumulator, and the first pipe port is communicated with one of the second and third pipe ports.