| 摘要: |
| 为研究空调的除尘和杀菌能力，使空调提供品质优良的空气，本文设计了基于变制冷剂流量型多联式空调系统换热器的自动清洁功能。首先通过换热器产生凝结水实现室内机除尘清洗，然后通过换热器产生高温实现室内机杀菌。通过选用空调中常见的翅片管式换热器，以室内机的凝结水量和盘管表面温度为指标，实验分析了室内风机转速、压缩机频率、室外温度、运行时长等对换热器除尘和杀菌能力的影响。结果表明：在除尘阶段，随着室内风机转速的增加，凝结水量先增加后降低，在相同的条件下运行20 min，室内风机转速为350 r/min时凝结水量达到最优值186 g，可以达到最优的清洁效果，增加运行时长、提高压缩机运行频率可提高凝结水量；在杀菌阶段，降低室内风机转速可提高换热器的盘管温度，转速为200 r/min时盘管温度达58.6 ℃，提高室外温度有利于提升杀菌阶段的盘管温度，但会降低除尘阶段的凝结水量。 |
| 关键词: 多联式空调 蒸发器 清洁 除尘 杀菌 |
| DOI： |
| 投稿时间：2020-05-17 修订日期：2020-06-20
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| 基金项目: |
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| Experimental Investigation on Self-cleaning Heat Exchanger in VRF System |
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Deng Saifeng, Liu Min, Liu Hexin, Chen Hua
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| (R & D Centre, Ningbo AUX Electric Co., Ltd.) |
| Abstract: |
| Providing healthy air has become an important indicator of air conditioners. In this study, a self-cleaning heat exchanger was designed in a variable refrigerant flow air-conditioning system, and the potential of dedusting and sterilization of the evaporator was investigated experimentally. Firstly, the dust removal and cleaning of the indoor unit were realized by the condensed water generated by the heat exchanger. Secondly, the high temperature generated by the heat exchanger was used to sterilize the indoor unit. A fin-and-tube heat exchanger was utilized in this study, and the amount of condensate water and tube temperature of the evaporator were used as the indicators. The influence of key parameters such as the fan’s rotating speed, compressor frequency, ambient temperature, and operating time on the dedusting and sterilization of the evaporator were analyzed. The experimental results show that the amount of condensate water first increases and then decreases with an increase in fan speed during the dedusting phase, reaching 186 g at a fan speed of 350 r/min when operated under the same condition for 20 min. The condensate water increased with the increase in operating time and the frequency of the compressor. During the sterilization phase, the tube temperature increased with a decrease in the fan speed and reached 58.6 °C at a rotating speed of 200 r/min. Higher outdoor temperatures are beneficial to the tube temperature during the sterilizing stage, but will decrease the amount of condensate water in the dust removal stage. |
| Key words: VRF system evaporator self-cleaning dedusting sterilization |
