Cold Regenerative Air Conditioning for Winter Heating Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional air source heat pump air conditioners struggle to function efficiently in cold winter conditions, especially in northern China, due to decreased heating efficiency and inability to meet heating demands, and existing refrigeration theories fail to provide a clear foundation for improving conversion efficiency in air conditioning systems.
Innovation Solution
A cold regenerative air conditioning apparatus is designed with a heat supply and refrigerating circulation circuit that recovers cold energy generated during the compression of gaseous refrigerant, utilizing a cold dynamics theory to enhance efficiency, featuring a cryogenic liquid pump, condensing evaporator, compressor, throttle valve, and reversing valves, along with a cold exchanger for improved heat transfer, and variable frequency speed regulation for the compressor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional air source heat pump air conditioners are used in cold winter conditions, then the system can provide heating function, but the heating efficiency decreases seriously and the system cannot start up and work normally
Solution Approach 1:
The patent changes the thermodynamic parameters of the refrigeration cycle by introducing a cold regenerator that recovers cold energy from the compressor discharge. This allows the system to maintain positive evaporating temperatures even in cold winter conditions, fundamentally changing the operating parameters to enable reliable startup and operation where traditional systems fail
Solution Approach 2:
The patent recovers the cold energy that would otherwise be discarded in the compressor discharge. By using a cold regenerator to capture this waste cold energy and transfer it to the evaporator inlet, the system recovers useful thermal energy that improves both heating reliability and efficiency in cold conditions
2Reliability
If traditional heat pump systems operate in cold environments, then heating function is provided, but energy consumption increases due to decreased efficiency
Solution Approach 1:
The system recovers waste cold energy from the compressor discharge using a cold regenerator, converting previously discarded thermal energy into useful cooling that pre-cools the evaporator inlet. This reduces the energy consumption required to achieve the same heating output in cold environmental conditions
Solution Approach 2:
The patent converts the harmful effect of cold ambient temperature and waste cold energy into a benefit by using the cold regenerator to capture and utilize the discharge cold energy. This transforms the adverse cold environment and waste energy into a resource that improves system efficiency and reduces overall energy consumption
3Device complexity
If traditional refrigeration theory based on Carnot reverse cycle is used, then the theoretical framework is established, but the conversion efficiency in practical air conditioning systems cannot be improved
Solution Approach 1:
The patent introduces a cold regenerator as an intermediary component between the compressor and evaporator. This intermediary device enables the recovery and transfer of cold energy, creating a new heat transfer pathway that improves conversion efficiency while maintaining the completeness of the theoretical framework
Solution Approach 2:
The system recovers the cold energy that would otherwise be wasted in the compressor discharge, transforming the traditional Carnot reverse cycle into an improved cycle with enhanced conversion efficiency. This practical modification builds upon the established theoretical framework while achieving measurable efficiency improvements
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 apparatus achieves higher thermal efficiency, reduces energy consumption, and extends equipment lifespan by effectively recovering refrigerating capacity and heat transfer, while minimizing environmental impact and maintenance needs, thus addressing the inefficiencies of traditional systems.
Implementation Method 1
liquid refrigerant (2) after being boosted by a cryogenic liquid pump (3)
Implementation Method 2
is sent into a condensing evaporator (9) to transfer the cold energy to the backflow refrigerant at a higher temperature
Implementation Method 3
the gaseous refrigerant at increased temperature, after increasing pressure and temperature via compressor (5)
Implementation Method 4
the refrigerant gas coming out from user system (6) enters the condensing evaporator (9), to recover cold energy and reduce temperature, and returns via throttle valve (10)
Data Source
AI summary
An air conditioning apparatus includes a refrigerant tank, a cryogenic liquid pump, a condensing evaporator, a compressor, a user system, a throttle valve, a first reversing valve, and a second reversing valve. It operates in two modes. In the first mode, the refrigerant in the refrigerant tank flows sequentially from the refrigerant tank, the cryogenic liquid pump, the condensing evaporator, the first reversing valve, the compressor, the second reversing valve, the user system, the first reversing valve, the second reversing valve, the condensing evaporator, the throttle valve, and back to the refrigerant tank. In the second mode, refrigerant in the refrigerant tank flows sequentially from the refrigerant tank, the cryogenic liquid pump, the condensing evaporator, the first reversing valve, the second reversing valve, the user system, the first reversing valve, the compressor, the second reversing valve, the condensing evaporator, the throttle valve, and back to the refrigerant tank.