Air conditioner and method for calculating operating parameter of indoor unit
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Solution Overview
Problem
Existing air conditioners face challenges in accurately calculating operating parameters of indoor units due to complex calculations that increase controller load and inaccuracies from damaged or aged components, leading to errors in the calculated parameters.
Innovation Solution
The air conditioner system includes a controller that determines operating parameters of indoor units by using sensors to detect temperature and pressure, adjusting expansion valve openings to regulate refrigerant flow, and calculating sensible heat load based on heat exchange area, coefficient, and temperature differences, simplifying the calculation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex calculation methods are used to determine operating parameters, then measurement precision may be improved, but device complexity increases and controller load increases
Solution Approach 1:
The patent extracts the core essential parameters needed for operating parameter calculation (heat exchange area, heat exchange coefficient, temperature difference) and separates them from complex computational processes. By focusing only on these critical parameters and using a simplified calculation formula, the system achieves accurate results without requiring complex algorithms or additional sensors, thus reducing controller load while maintaining measurement precision.
2Measurement precision
If complex calculation methods are used to determine operating parameters, then measurement precision may be improved, but loss of time increases
Solution Approach 1:
The patent extracts and utilizes only the essential real-time parameters (heat exchange area, heat exchange coefficient, temperature difference) that directly affect operating parameter accuracy. By eliminating unnecessary calculation steps and focusing on these core parameters, the system achieves rapid calculation with high precision, significantly reducing calculation time while maintaining accuracy.
3Device complexity
If traditional calculation methods are used, then device complexity remains low, but reliability decreases due to errors from damaged or aged components
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors actual temperature and pressure parameters during operation and uses these real-time measurements to calculate operating parameters through a simplified but accurate formula. This approach compensates for component aging or damage by relying on actual measured data rather than theoretical calculations, thereby maintaining high reliability while keeping the system simple.
Solution Approach 2:
The system uses its own operational parameters (temperature, pressure) to self-calculate and self-adjust the operating parameters of the indoor unit. By utilizing internally generated data from its own sensors and applying a straightforward calculation method, the system maintains reliability without requiring external complex computational resources or additional sophisticated components.
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 approach reduces the controller's operating load, enhances accuracy of calculated parameters, and improves cooling or heating efficiency while reducing power consumption.
Implementation Method 1
The indoor unit includes an indoor expansion valve, an indoor heat exchanger, and a plurality of first sensors. The compressor, the four-way valve, the outdoor heat exchanger, the outdoor expansion valve, the indoor expansion valve, the indoor heat exchanger, and the compressor are sequentially connected, so as to provide a refrigerant circulation.
Implementation Method 2
The outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, and an outdoor expansion valve.
Implementation Method 3
The outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, and an outdoor expansion valve. The indoor unit includes an indoor expansion valve, an indoor heat exchanger
Data Source
AI summary
An air conditioner and a method for calculating an operating parameter of an indoor unit are provided. The air conditioner includes an outdoor unit, an indoor unit, and a controller. The controller is configured to: in a case where the air conditioner is in a cooling state, determine an operating parameter of the indoor unit in a second cooling state according to a heat exchange area, a heat exchange coefficient, and a heat exchange temperature difference of an indoor heat exchanger; and determine an operating parameter of the indoor unit in a first cooling state according to a superheat degree of an outlet of the indoor heat exchanger in the first cooling state, a superheat degree of the outlet of the indoor heat exchanger in the second cooling state, and the operating parameter of the indoor unit in the second cooling state.