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微波炉几乎是家中必备的家用电器,可以用来加热、烹调和解冻食品。但是,现有的微波炉还是一些缺点,如噪音太大,使用寿命短,性能不够稳定。针对这些问题,本文在对传统的抽屉式微波炉分析的基础上,对微波炉的内部结构以及自动开关门装置做了一些改进,希望可以设计出噪音小、性能稳定可靠、使用寿命长的抽屉式微波炉,希望本文的研究可以对传统的抽屉式微波炉进行优化,给人们的生活带来更大的方便。 相似文献
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本文通过对家用微波炉、自动电饭锅、家用电磁灶等三类小家电产品对应的安全标准与能效检测标准进行对比研究,详细分析其具体检测方法,以介绍安全与能效测试方法的差异与关联。一、家用微波炉1.依据标准微波炉的安全检测标准为GB4706.21-2008《家用和类似用途电器的安全微波炉包括组合型微波炉的特殊安全》与安全通用 相似文献
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海尔微波炉进入行业三甲最新统计数据显示,海尔微波炉以12.7%的市场份额,进入行业三甲。这标志着多年来格兰仕、LG、美的三大品牌铁三角统治市场的格局被打破,微波炉行业结构首次实现大变脸。面对几年来竞争对手用价格战鲸吞市场的急功近利,海尔微波炉始终坚持高科技,高质量,绿色环保的企业宗旨,从高端占领市场。率先推出了电子菜单式微波炉,IC卡式可替换菜单式微波炉,双面烤微波炉、上波导太阳微波炉、网络式微波炉等一系列高技术含量的产品,为企业的可持续性发展奠定了基础。2003年,海尔微波炉率先推出了国际领先水平的转波炉, 从高端挺进市场,高歌猛进,成为微波炉市场上的最大亮点。 相似文献
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目的 基于有限元软件对运输条件下的电暖器包装件进行踩踏损伤分析和包装结构优化,解决运输环境下的电暖器发生踩踏损伤的问题.方法 依据售后问题对电暖器包装件进行踩踏试验,并基于Creo对电暖器和缓冲包装进行建模,利用有限元软件对产品包装件进行仿真分析,依据仿真结果对电暖器缓冲包装结构进行优化设计,最后对比优化前后的踩踏结果,并进行相关包装运输的测试试验,确保新的包装件符合包装运输的标准要求.结果 包装件原有的缓冲包装结构并未对产品起到保护作用,外罩发生了较大面积的应力集中,最大应力为304.5 MPa.优化包装结构后,新的缓冲结构承受了绝大部分的力,很好地保护了电暖器,满足各项包装运输试验测试的要求.结论 通过利用有限元软件进行包装结构优化设计,有效地解决了电暖器踩踏问题,合理优化了电暖器的缓冲包装结构,节省了新包装结构的开发时间. 相似文献
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A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling. 相似文献
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An approximate analytical expression is derived for the velocity of the front of the wave of change of boiling modes on a
rod and on a plate. The impact of the Thomson effect and of the heater orientation in the gravity field is included. Adequate
agreement is demonstrated between the derived relations and experimental data. 相似文献
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Liebert A Wabnitz H Grosenick D Möller M Macdonald R Rinneberg H 《Applied optics》2003,42(28):5785-5792
A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue. 相似文献
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水三相点是开尔文热力学温度的唯一基准点,也是ITS-90国际温标重要的定义固定点。因此,水三相点不确定度分析对整个温标的建立、温度量值传递起着至关重要的作用。近3年来,中国计量科学研究院研制出一系列高质量的水三相点容器,加强了水三相点的研究,为不确定度的分析提供了更为可靠的实验依据。同时,不确定度的分析也是客观评价新研制容器性能的一个重要指标。因此,根据实验结果对新研制容器所复现的水三相点进行了不确定度评定。评定结果表明,其扩展不确定度为0.16mK(k=2.69,P=0.99)。 相似文献
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Conventional methods for summation of direct measurement errors are considered. Conditions under which these methods provide consistent results are stated. It is proposed to utilize for characteristic of the total error, its interval estimator or the half-sum of the value obtained by adding up its arithmetic and geometric random errors.Translated from Izmeritel'naya Tekhnika, No. 4, pp. 10–12, April, 1995. 相似文献