Method and device for controlling integrated air conditioner, integrated air conditioner
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Solution Overview
Problem
Integrated air conditioners blow cold air during heating mode due to low evaporator temperature, affecting user experience.
Innovation Solution
Control the opening of the first damper based on evaporator piping temperature and compressor operation duration to adjust airflow, and switch to cooling mode for defrosting when necessary, using a four-way valve and expansion valve to manage pressure balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the air conditioner operates in heating mode with the evaporator at low temperature, then heating function is provided, but cold air is blown affecting user experience
Solution Approach 1:
The control method performs preliminary detection of evaporator temperature and compressor operation duration before cold air is blown. When the evaporator temperature is below the first preset temperature and the compressor operation duration is less than the first preset duration, the system proactively adjusts the first damper to the first target opening in advance, preventing cold air output before it occurs.
Solution Approach 2:
The system continuously monitors evaporator temperature and compressor operation duration, using this feedback to dynamically adjust the first damper opening. The control method compares real-time temperature and duration data against preset thresholds, and adjusts the damper opening accordingly to maintain optimal performance and prevent cold air blowing.
2Reliability
If the condenser frosts during heating mode, then heat exchange efficiency decreases, but defrosting requires mode switching and complex control
Solution Approach 1:
The system performs preliminary detection of frosting conditions by monitoring compressor operation duration and evaporator temperature. When the compressor operates for a predetermined time or the evaporator temperature reaches a preset threshold, the system proactively initiates defrosting mode switching before severe frosting occurs, maintaining heat exchange efficiency.
Solution Approach 2:
The control method implements periodic defrosting operations based on compressor runtime and temperature conditions. The system alternates between heating mode and defrosting mode at predetermined intervals or when thresholds are reached, ensuring the condenser remains free of excessive frost while maintaining overall system efficiency.
3Productivity
If the first damper opening is increased to improve heating efficiency, then heat transfer improves, but cold air may be blown when evaporator temperature is low
Solution Approach 1:
The first damper opening is dynamically adjusted based on real-time evaporator temperature and compressor operation duration. The system transitions between different damper positions (first target opening, second target opening, third target opening) depending on operating conditions, allowing optimal heating efficiency when temperature is sufficient while preventing cold air output when temperature is low.
Solution Approach 2:
The control method changes the damper opening parameter based on temperature and time parameters. When evaporator temperature is below the first preset temperature and compressor duration is less than the first preset duration, the damper is set to the first target opening (smaller opening). When temperature and duration exceed thresholds, the damper opening is increased to improve heating efficiency.
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
Improves heating efficiency by preventing cold air output and effectively defrosting the condenser, enhancing user experience through flexible operation modes.
Implementation Method 1
using a four-way valve and expansion valve to manage pressure balance
Implementation Method 2
using a four-way valve and expansion valve to manage pressure balance
Implementation Method 3
obtaining a piping temperature of the evaporator
Implementation Method 4
at the end of defrosting or in the heating mode, since a temperature of an indoor heat exchanger is low in this case
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The present disclosure relates to a method and device for controlling an integrated air conditioner, an integrated air conditioner, a medium and a product. The integrated air conditioner includes a compressor, an evaporator and a first damper corresponding to the evaporator, and the method includes: in a case where the integrated air conditioner is in operation in a heating mode, obtaining a piping temperature of the evaporator and/or a duration for which the compressor is in operation in the heating mode; and in a case where the duration for which the compressor is in operation in the heating mode reaches a first preset duration, and/or the piping temperature of the evaporator is greater than a first preset temperature, increasing an opening of the first damper from a third target opening to a first target opening. In this way, increasing the opening of the first damper can effectively transfer the heat in the evaporator to the environment, improve the heating efficiency, and thus achieve the purpose of heating while preventing the cold air.