共查询到18条相似文献,搜索用时 125 毫秒
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采用试验研究的方法,分析了空调器室外机组的风扇转速和防护网对气动噪声的影响。通过测量发现:风扇转速和防护网钢丝直径对噪声频谱分布有重要的影响。 相似文献
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详细分析了影响空调器室外机组气动噪声的原因,解决了降低空调器噪声的问题,指出了风机转速和防护网是影响噪声的主要因素. 相似文献
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本文通过对挂壁式空调器室外机组噪声来源的分析,依靠不断摸索、反复试验的手段,提出了控制室外机组噪声的措施。 相似文献
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导流罩对空调器室外机噪声的影响 总被引:3,自引:0,他引:3
为了明确导流罩对空调器室外机噪声的影响,利用数值模拟的方法对室外机内部气体流动进行了计算,研究了室外机出风口相对湍流强度的变化,分析了导流罩宽度、导流罩导弧对室外机噪声的影响。通过计算分析和试验验证,表明空调器室外机导流罩的宽度存在一个最佳值使室外机的噪声最小。同时,根据导流罩导弧对室外机噪声影响的规律设计出双导弧导流罩,经过试验验证分析,表明双导弧导流置与目前普遍使用的导流罩相比具有更好的气动性能,能进一步降低空调器室外要的噪声。 相似文献
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在综合大量文献的基础上,对空调器的发展与演变过程进行详细的分析.特别针对空调器噪声问题的研究现状进行了分析.并分析了开展空调器噪声研究的意义. 相似文献
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提出了一种空气/水复合热源热泵型空调器,冬夏使用中在采用空气作为热源同时可以回收利用家庭废水的低品位热能。运用热力学原理研究了夏季在不同新风比、不同室内温度时机组制冷系数随冷凝水回收后温度变化而变化情况;分析了机组冬季制热回收废水缓解室外换热器结霜的机理,研究了采用R22和R407C工质时回气温度和蒸发压力随回收废水量和出水温度的变化。结果表明,采用空气/水作为热泵型空调器的复合热源,能够提高机组夏季制冷循环的制冷系数,冬季制热时有利于延缓室外换热器结霜、改善冬季制热性能。 相似文献
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针对海上设备防护网金属丝直径与防护网尺寸悬殊导致的有限元分析计算困难,利用超单元采用三层单元有限元模型对海上设备防护网动特性进行有限元分析.分析表明.细密防护网的主要动特性表现为准静态特性,高频动特性表现不明显.细密金属网虽然有利于提高设备屏蔽特性,但是在风载作用下将产生过大的变形.对防护网动特性进行预测有利用在保证屏设备屏蔽特性的条件下提高防护网的可靠性. 相似文献
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空调室外机气动与声学特性的研究进展 总被引:1,自引:0,他引:1
《流体机械》2015,(7)
空调室外机噪声包括机械噪声、电磁噪声和气动噪声,其中机械噪声和电磁噪声在常规状态下影响较小,气动噪声是空调室外机风道系统的主要噪声。本文回顾了国内外关于空调室外机气动噪音的研究历史与现状,结合文献着重从数值模拟、试验研究以及模态分析几个方面进行了分析。经过分析总结,提出了进一步降噪需要开展的工作。 相似文献
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空调系统现在广泛应用于大型商场、饭店、车间等场所。为了提高换热效率和换热量,空调室外机大多采用轴流式换热风扇。通过对比发现,通风量在5 300~6 600m3/h的中型空调室外机研究较少。为了提高通流量和全压,从而增强换热效果,本文针对某公司产品中分体式空调室外机轴流换热风扇进行了风管性能测试实验与数值模拟。其中为了考核数值计算的可靠性,对于模拟仿真如何与实验匹配进行了计算区域的研究。结果表明进计算区域出口长度存在恰当匹配,并为数值模拟与风管实验台测试吻合提出了一个数值模拟计算域的选取准则。 相似文献
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The leaking safety of air conditioner using R290 has been a research hotspot in recent years, one method to lower the risk of explosion after leakage is utilizing ventilation. For fresh air conditioner, it's common to use thermal anemometry and differential pressure flowmeters to measure ventilation flow rate. However, there is non-negligible error especially under low air volume flow rate conditions. In this paper, a novel integral-type air conditioner with heat recovery using R290 is proposed. And the relevant influencing parameters are analyzed and experimentally studied. The results show that tracer gas method is an effective way to measure ventilation flow rate, and the novel integral-type air conditioner can meet the needs of the ventilation standards. The air volume flow rates of indoor unit fan and outdoor unit fan are dominant factors affecting ventilation flow rate. The outlet area of exhaust air duct is more sensitive than the inlet area of fresh air duct in exerting influence on ventilation flow rate, while the indoor temperature has a mild impact on ventilation flow rate. 相似文献
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Experimental analysis for reducing refrigerant-induced noise of 4-way cassette type air conditioner 总被引:1,自引:0,他引:1
Hyung Suk Han Weui Bong Jeong Shigeo Aoyama Jin Yong Mo 《Journal of Mechanical Science and Technology》2009,23(5):1456-1467
Various refrigerant flow patterns can produce a range of noise types according to their cycle conditions. Consequently, the
identification of flow patterns in a tube is crucial to reducing refrigerant-induced noise. Because of the obstacles involved
in identifying them accurately by experiment, in this paper, these flow patterns are estimated from the flow pattern map.
Working from the assumption that the refrigerant-induced noise for an air conditioner in the heating mode comes from slug
flow in the condenser-outlet pipe, the reduction of refrigerant-induced noise by avoiding slug flow in a tube is examined.
To fully understand the conditions under which the refrigerant-induced noise occurs, cycle simulator equipment for an outdoor
unit is developed. With this cycle simulator, noise tests of 4-way cassette type indoor units are performed under the conditions
that the refrigerant-induced noise occurs. Increasing the mass flux in a tube by reducing the diameter of the condenser-outlet
pipe can avoid slug flow, and the refrigerant-induced noise can therefore be reduced. The results of the cycle simulator can
be verified with an outdoor unit 5HP system multi air conditioner and the results are well in line with simulator results.
This paper was recommended for publication in revised form by Associate Editor Yeon June Kang
Hyung-Suk Han received a B.S. degree in Production and Mechanical Engineering from Pusan National University in 1996. He then went on to
receive his M.S. and Ph.D. degrees from Pusan National University in 1998 and 2007, respectively. Dr. Han is currently a Senior
Researcher at Defense Agency of Technology and Quality, Pusan, Korea. He is currently serving as a Co-Researcher of Noise
and Vibration Analysis Laboratory in Pusan National University. Dr. Han’s research interests are in the area of the mechanical
applications of noise and vibration including refrigerant-induced noise.
Wei-Bong Jeong received a B.S. degree in Mechanical Engineering from Seoul National University in 1978. He then went on to receive his M.S.
and Ph.D. degrees from KAIST in 1980 and from Tokyo Institute of Technology in 1990, respectively. Dr. Jeong is currently
a Professor at the Mechanical Engineering at Pusan National University in Busan, Korea. He is currently serving as an Academic
Director of the Korean Society for Noise and Vibration Engineering. Dr. Jeong’s research interests are in the area of the
measurement and signal processing of noise and vibration, finite/boundary element programming of noise and vibration, fluid-structure
interactions and acoustic-structure interactions. 相似文献
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空调外机作为空调重要换热的部件,其温度过高会造成外机运行故障,从而导致系统瘫痪,所以针对空调外机温度场进行数值模拟,计算和仿真温度较高区域,便于对空调外机高温处进行温度控制,优化外机运行环境。通过外机内部流体的换热,热传递及其对流,建立流体内部导热方程,同时建立空气与风扇的控制方程,设置边界条件,完成空调外机理论建模,利用Fluent软件,模拟正常换热过程,来观察外机内部流体不同时刻温度变化,空气出口温度,得到不同时刻空调内部流场温度分布图。通过Fluent分析能较准确地得到空调外机温度场分布,为实际空调外机温度控制及其监测提供理论支撑。 相似文献