Air conditioner and condensation preventing method and device thereof
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Solution Overview
Problem
Variable frequency air conditioners experience condensation issues at low input voltages, leading to water blowing and dripping from the indoor heat exchanger, which affects their reliability.
Innovation Solution
The air conditioner adjusts the compressor's operating frequency based on the current input voltage, using a pre-stored Voltage-Rotational speed-Frequency table or calculations to ensure the frequency remains within target operable limits, correlating with input voltage and indoor humidity to prevent condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the minimum operating voltage is reduced to enable variable frequency operation, then the adaptability of the air conditioner to different voltage conditions is improved, but condensation occurs at the evaporator causing water blowing and dripping
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the compressor operating frequency based on the detected input voltage level. When voltage drops below a threshold, the system reduces the compressor frequency to prevent evaporator temperature from dropping too low, thereby avoiding condensation. This is implemented through voltage detection circuits and control algorithms that modify operational parameters in real-time.
Solution Approach 2:
The patent implements feedback control by continuously monitoring the input voltage and using this information to adjust the compressor frequency. The system detects voltage conditions, compares them with preset thresholds, and provides feedback to the control unit which then modifies the compressor operation accordingly. This closed-loop control ensures the system adapts to changing voltage conditions while preventing harmful condensation.
2Object-generated harmful factors
If the compressor frequency is reduced to prevent condensation at low voltage, then the harmful effect of water dripping is eliminated, but the cooling efficiency and productivity of the air conditioner decreases
Solution Approach 1:
The patent applies dynamics by making the compressor frequency adjustable rather than fixed. The system dynamically modifies the operating frequency based on real-time voltage conditions, allowing optimal performance at normal voltage and preventing condensation at low voltage. This dynamic adjustment is achieved through control units that modify inverter parameters and compressor speed according to detected voltage levels.
Solution Approach 2:
The patent changes operational parameters (compressor frequency, inverter output) based on voltage conditions. At low voltage, the system reduces compressor frequency to prevent condensation while maintaining sufficient cooling capability. At normal voltage, the system operates at optimal frequency for maximum efficiency. This parameter adaptation resolves the contradiction between preventing water dripping and maintaining cooling efficiency.
Data Source
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AI summary
Disclosed by the present application are an air conditioner and a condensation preventing method and device thereof, the method comprising the following steps: acquiring current input voltage of the air conditioner; identifying, according to the current input voltage, whether the air conditioner is in a low-voltage operation state; and limiting the operation frequency of a compressor in the air conditioner according to the current input voltage. The condensation preventing method according to the present application may effectively solve the problem that when the input voltage is low, an indoor heat exchanger blows water and drops water, and improves the operation reliability of the air conditioner.