Method and apparatus for controlling heating operation of air conditioner
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Solution Overview
Problem
Air conditioners in heating mode often take too long to reach target room temperatures, causing discomfort due to slow temperature rise, especially when the calculated target frequency is not high enough or when room temperatures are extremely low.
Innovation Solution
A method and apparatus for controlling air conditioner heating operations that involves fuzzy control and PID calculations to adjust compressor frequency based on indoor and coil temperatures, with electric heating device control determined by coil temperature thresholds, ensuring rapid temperature increase and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the calculated target frequency is not high enough, then the compressor runs at a moderate speed, but the room temperature rises very slowly causing discomfort
Solution Approach 1:
The patent implements dynamic frequency adjustment by switching between different control modes (PID control and fuzzy control) based on real-time temperature conditions. The system dynamically increases compressor frequency when indoor temperature is below the threshold and switches to standard PID control when the threshold is reached, optimizing both response speed and energy efficiency throughout the heating process.
Solution Approach 2:
The patent changes the control parameter (compressor frequency) based on the indoor temperature parameter. When the indoor temperature is below the threshold, the system increases the compressor frequency parameter to accelerate heating. This parameter adjustment resolves the contradiction by allowing high speed when needed while maintaining moderate operation under normal conditions.
2Power
If the room temperature is extremely low, then the air conditioner must work harder to heat the space, but it has to spend longer time waiting for the temperature to rise
Solution Approach 1:
The patent applies preliminary action by detecting low temperature conditions in advance and proactively increasing compressor frequency before the temperature naturally recovers. When the indoor temperature is detected to be below the threshold, the system preemptively boosts heating power through frequency increase, preventing prolonged waiting time and ensuring faster temperature recovery.
Solution Approach 2:
The system dynamically adjusts heating power based on real-time temperature monitoring. Under extreme cold conditions, the compressor operates at higher frequency to deliver maximum heating power. As the temperature approaches the threshold, the system dynamically reduces frequency to maintain comfort while saving energy, thus resolving the time-power contradiction.
3Productivity
If the compressor frequency is increased to raise room temperature quickly, then the heating speed improves, but energy consumption increases
Solution Approach 1:
The patent implements periodic action through threshold-based control switching. The system alternates between high-frequency operation (when temperature is below threshold) and standard PID control (when threshold is reached). This periodic switching pattern achieves rapid heating when necessary while maintaining energy efficiency during normal operation, resolving the productivity-energy contradiction.
Solution Approach 2:
The system changes the compressor frequency parameter conditionally based on temperature thresholds. High frequency is applied only when the indoor temperature is below the threshold, and standard frequency is used when the threshold is reached. This conditional parameter change optimizes the balance between heating speed and energy consumption by applying high power only when absolutely necessary.
Data Source
AI summary
A method for controlling the heating operation of an air conditioner. The method comprises: an air conditioner executing a heating operation, and acquiring an indoor temperature; if the indoor temperature is not greater than the first indoor temperature threshold value, executing fuzzy control; according to the difference in temperature between the indoor temperature and a set target indoor temperature, carrying out room temperature PID calculation so as to acquire a first target frequency; acquiring a coil temperature of an indoor heat exchanger, and if the coil temperature is greater than a set target coil temperature, determining the first target frequency to be an indoor unit frequency; otherwise, increasing the current operation frequency of a compressor so as to obtain a second target frequency, selecting the larger value of the first target frequency and the second target frequency, and determining the larger value to be the indoor unit frequency; controlling the compressor of the air conditioner according to the indoor unit frequency; and while executing dual PID control, according to the coil temperature, controlling electrical heating. Further disclosed is an apparatus for controlling the heating operation of an air conditioner. By means of the method and apparatus, the problem of heating being uncomfortable due to the fact that existing air conditioners are slow to provide heating can be solved.