Air conditioner and self-cleaning control method therefor and device thereof, and computer readable storage medium
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Solution Overview
Problem
Existing air conditioners with self-cleaning functions often experience insufficient frosting and incomplete cleaning effects, leading to unstable operation and unsatisfactory user experiences due to excessive system pressure during the self-cleaning process.
Innovation Solution
A self-cleaning control method that monitors high-pressure-side pressure and duration of the compressor's cooling operation to switch to a heating mode, and uses temperature and duration at the outdoor heat exchanger to exit the self-cleaning mode, optimizing the cleaning process by controlling the compressor frequency, throttling device opening, and fan operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air conditioner performs self-cleaning by frosting and defrosting the evaporator, then the cleaning function is achieved, but the system pressure becomes excessively high exceeding normal compressor operating pressure
Solution Approach 1:
The patent applies dynamics by making the compressor frequency variable during the self-cleaning process. The control method adjusts the compressor frequency based on real-time pressure feedback, reducing it when pressure exceeds the threshold and increasing it when pressure is within normal range. This dynamic adjustment allows the system to maintain cleaning effectiveness while preventing excessive pressure buildup that would compromise stable operation.
Solution Approach 2:
The patent implements feedback control by continuously monitoring the pressure at the compressor exhaust port and using this information to adjust the compressor frequency. When the pressure reaches a predetermined threshold, the system automatically reduces the compressor frequency to lower the pressure. This closed-loop feedback mechanism ensures the system pressure remains within safe operating limits while still achieving the frosting and defrosting necessary for cleaning.
2Reliability
If the air conditioner performs self-cleaning by frosting and defrosting the evaporator, then the cleaning function is achieved, but the frosting effect is dissatisfactory resulting in incomplete cleaning
Solution Approach 1:
The patent applies dynamics by adjusting the compressor frequency based on pressure feedback to optimize the frosting process. By dynamically controlling the compressor speed, the system can maintain appropriate pressure levels that facilitate effective frosting of the evaporator. This ensures sufficient frosting degree for complete cleaning while preventing pressure-related operational issues.
Solution Approach 2:
The patent changes the operating parameters of the compressor during the self-cleaning cycle. Specifically, it adjusts the compressor frequency based on real-time pressure measurements, modifying the system pressure parameter to optimize both frosting effectiveness and operational stability. This parameter adjustment ensures the evaporator achieves adequate frosting for thorough cleaning without causing excessive pressure buildup.
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 method improves the frosting degree and cleaning effectiveness, ensuring a more stable and satisfactory self-cleaning process, enhancing user experience by addressing the issues of insufficient frosting and incomplete cleaning.
Implementation Method 1
a compressor configured to compress the refrigerant gas to high pressure to generate high-pressure refrigerant gas
Implementation Method 2
a four-way reversing valve configured to switch between a cooling mode and a heating mode according to an operation mode of the air conditioner
Implementation Method 3
an outdoor heat exchanger configured to serve as a heat dissipation device during the cooling operation and serve as a heat absorption device during the heating operation
Implementation Method 4
an indoor heat exchanger configured to serve as a heat absorption device during the cooling operation and serve as a heat dissipation device during the heating operation
Implementation Method 5
an electronic expansion valve configured to throttle the high-pressure refrigerant gas to generate low-pressure refrigerant gas
Implementation Method 6
a condenser configured to condense the high-pressure refrigerant gas to generate high-pressure liquid refrigerant
Implementation Method 7
an evaporator configured to evaporate the low-pressure liquid refrigerant to generate low-pressure refrigerant gas
Data Source
AI summary
A self-cleaning control method for an air conditioner and a device and a computer readable storage medium associated with the method are provided. According to the method, in response to the air conditioner entering a self-cleaning mode, the air conditioner is controlled to perform a cooling operation. During the cooling operation, a high-pressure-side pressure of an exhaust port of a compressor is acquired and a duration of the cooling operation is recorded. Based on the high-pressure-side pressure and the duration, the air conditioner is controlled to switch to perform a heating operation. During the heating operation, a temperature at a bottom of an outdoor heat exchanger is acquired and a duration of the heating operation is recorded. Based on the temperature and the duration, the air conditioner is controlled to exit the self-cleaning mode.