Method for controlling air conditioner
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Solution Overview
Problem
Existing air conditioner noise reduction technologies do not effectively address refrigerant flow noises, especially at night, and require user-initiated low-noise operation modes, which can be inconvenient.
Innovation Solution
A method for controlling an air conditioner that automatically determines execution times for low-noise operations by limiting compressor frequency, indoor and outdoor blower rotation rates, and refrigerant flow, using time-based logic to reduce noise levels without user input, while ensuring target pressures are maintained through supplementation operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If user-initiated low-noise operation mode is implemented, then air-blowing noises are reduced, but user convenience deteriorates due to manual input requirement
Solution Approach 1:
The air conditioner automatically detects nighttime conditions and initiates low-noise operation without user input. The control unit monitors operation timing and autonomously adjusts compressor frequency and blower rotation rates, allowing the system to serve itself in noise reduction rather than requiring continuous user intervention.
Solution Approach 2:
The system pre-establishes noise reduction parameters for nighttime operation. When nighttime is detected, the control unit proactively limits compressor frequency to predetermined values and reduces blower rotation rates before noise becomes a complaint, preparing the system in advance for quiet operation.
2Object-generated harmful factors
If compressor frequency is limited to reduce noises, then noise levels are reduced, but cooling/heating efficiency may deteriorate
Solution Approach 1:
The system applies partial compression frequency reduction only during nighttime low-noise periods rather than continuously. The control unit limits compressor frequency to predetermined values specifically when nighttime operation is detected, allowing full frequency range during daytime when noise is less critical, thus maintaining efficiency when needed while reducing noise when appropriate.
Solution Approach 2:
The compressor frequency limitation is dynamically adjusted based on operation timing. The control unit transitions between different frequency limits depending on whether it is nighttime or daytime, making the frequency constraint flexible rather than fixed to balance noise reduction and efficiency requirements.
3Object-generated harmful factors
If refrigerant flow is reduced to minimize flow noises, then refrigerant noises are reduced, but heat exchange performance may worsen
Solution Approach 1:
The system applies refrigerant flow reduction periodically only during nighttime low-noise operation periods. The control unit reduces refrigerant flow rates when nighttime is detected and maintains normal flow rates during daytime, creating a periodic pattern of flow restriction that aligns with noise sensitivity cycles rather than applying continuous restriction.
Solution Approach 2:
The system changes operational parameters (refrigerant flow rate, compressor frequency, blower speed) based on time-of-day conditions. During nighttime, parameters are adjusted to reduce noise; during daytime, parameters return to normal values for optimal performance, allowing the system to adapt its parameters to different operational contexts.
4Ease of operation
If automatic nighttime detection is implemented, then user convenience is improved, but device complexity increases
Solution Approach 1:
The control unit continuously monitors operation timing and uses this feedback to automatically determine when nighttime low-noise operation should be activated. By incorporating time detection feedback into the control logic, the system automatically adjusts its operation based on the detected time period without requiring complex user interfaces or manual scheduling.
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 method effectively reduces refrigerant and air-blowing noises during designated low-noise operation times, enhancing user convenience and air conditioner performance by automatically adjusting operational parameters to minimize noise pollution at night.
Implementation Method 1
the refrigerant compressed in the compressor of the outdoor unit
Implementation Method 2
the refrigerant compressed in the compressor of the outdoor unit is condensed while passing through the outdoor heat exchanger
Implementation Method 3
the refrigerant may be decompressed in an indoor expansion device
Implementation Method 4
the refrigerant may be decompressed in an indoor expansion device and be evaporated in an indoor heat exchanger
Implementation Method 5
while an indoor fan rotates, the cooled air may be discharged into an indoor space
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
Provided is a method for controlling an air conditioner. The method for controlling an air conditioner includes determining time information for determining an execution time of a low-noise operation and performing the low-noise operation according to the determined time information. The performing of the low-noise operation includes limiting a maximum value of an operation frequency of a compressor; and reducing an amount of refrigerant introduced into an indoor unit.