【摘要】：冷凝器作為冰柜制冷體系中不可或缺的一部分,在制冷過程中起著非常重要的作用。從壓縮機(jī)排出的高溫、高壓的制冷劑蒸氣在流經(jīng)冷凝器過程中,通過向周圍的空氣放熱,逐步降溫,從而冷凝成為液體。制冷劑之所以能夠制冷,前提條件就是由液態(tài)轉(zhuǎn)變?yōu)闅鈶B(tài),因此,冷凝過程非常重要。冷凝器通常由紫銅管或復(fù)合鋼管經(jīng)卷管機(jī)卷成彎管并由縫焊機(jī)焊接而成。而冷凝器的焊縫開裂會導(dǎo)致制冷劑的泄漏,這不僅會影響冰柜的制冷效果,而且還會產(chǎn)生安全隱患。因此對冷凝器的氣密性進(jìn)行檢測是非常有必要的。本文即以某冷凝器生產(chǎn)廠商生產(chǎn)的冷凝器為檢測對象。 根據(jù)系統(tǒng)的檢測要求,設(shè)計出一種氣密性檢測系統(tǒng)。使用該系統(tǒng)分別對標(biāo)準(zhǔn)樣品和待測樣品進(jìn)行檢測,并根據(jù)其數(shù)據(jù)曲線的逼近程度來判斷待測樣品氣密性是否良好。本系統(tǒng)的檢測過程為：首先,將通入冷凝器的氣體產(chǎn)生的壓強(qiáng)轉(zhuǎn)化為便于采集的電壓信號,接著,對電壓信號進(jìn)行采集,然后把采集到的數(shù)據(jù)發(fā)送到上位機(jī),最后,上位機(jī)將采集到的數(shù)據(jù)以曲線的形式顯示出來,并對標(biāo)準(zhǔn)樣品曲線和待測樣品曲線進(jìn)行比對。本系統(tǒng)所完成的工作包括：信號轉(zhuǎn)換模塊的電路設(shè)計、數(shù)據(jù)采集模塊和通訊模塊的軟、硬件設(shè)計以及上位機(jī)軟件的設(shè)計。其中,通訊模塊分為USB通訊和基于ZigBee的無線通訊兩種方式。標(biāo)準(zhǔn)樣品曲線和待測樣品曲線的比對,既可以通過操作人員的經(jīng)驗(yàn)進(jìn)行判斷,也可以通過算法進(jìn)行自動判斷。 系統(tǒng)各個模塊的硬件、軟件設(shè)計完成后,對其功能分別進(jìn)行測試,發(fā)現(xiàn)并解決了電路中存在的一些問題。最后系統(tǒng)整體測試正常,可以實(shí)現(xiàn)對冷凝器氣密性的檢測。不過要投入工廠大規(guī)模使用,其穩(wěn)定性和可靠性還需要通過大量的測試來驗(yàn)證。
[Abstract]:As an indispensable part of freezer refrigeration system, condenser plays a very important role in the refrigeration process. The high temperature and high pressure refrigerant vapor discharged from the compressor in the process of passing through the condenser, through the surrounding air heat release, gradually cooling, thus condensing into a liquid. Refrigerant can be refrigerated, the prerequisite is from liquid to gas, so the condensation process is very important. Condensers are usually made of copper tubes or composite steel tube winding machines, which are welded by seam welding machines. The cracking of the weld seam of the condenser will lead to the leakage of refrigerant, which will not only affect the refrigerating effect of the freezer, but also produce the hidden danger of safety. Therefore, it is necessary to detect the air tightness of condenser. In this paper, the condenser produced by a condenser manufacturer as the test object. According to the requirements of the system, a gas tightness detection system is designed. The system is used to detect the standard sample and the sample to be tested, and to judge whether the gas tightness of the sample under test is good or not according to the approximation degree of the data curve. The detection process of the system is as follows: firstly, the pressure generated by the gas flowing into the condenser is converted into a voltage signal that is convenient to collect. Then, the voltage signal is collected, and then the collected data is sent to the upper computer. Finally, The collected data are displayed in the form of curves by the upper computer, and the standard sample curves are compared with the sample curves to be tested. The work of the system includes the circuit design of the signal conversion module, the software and hardware design of the data acquisition module and the communication module, and the design of the upper computer software. Among them, communication module is divided into USB communication and wireless communication based on ZigBee. The comparison between the standard sample curve and the sample curve to be tested can be judged not only by the operator's experience, but also by the algorithm. After the hardware and software design of each module of the system are finished, the functions of the system are tested, and some problems in the circuit are found and solved. Finally, the whole system is tested normally and the air tightness of condenser can be detected. However, its stability and reliability need to be verified by a large number of tests to be used in large scale.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB657.4;TP274

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 齊麗娜,干宗良;一種新的無線技術(shù)ZigBee[J];電信快報;2004年09期

2 李剛;張志宏;;蜜蜂的舞蹈—Zigbee的無線網(wǎng)絡(luò)技術(shù)和應(yīng)用[J];電子產(chǎn)品世界;2006年03期

3 閆富松;趙軍輝;李秀萍;;ZigBee技術(shù)及其應(yīng)用[J];廣東通信技術(shù);2006年04期

4 魏忠晉;;ZigBee無線糧情監(jiān)測網(wǎng)絡(luò)的應(yīng)用[J];電子制作;2013年13期

5 陳銳;周書民;;一種氡濃度測量過程中異常值的判斷方法[J];核電子學(xué)與探測技術(shù);2011年12期

6 彭光正;紀(jì)春華;葛楠;;氣密性檢測技術(shù)現(xiàn)狀及發(fā)展趨勢[J];機(jī)床與液壓;2008年11期

7 劉期烈;祝孟偉;黃巍;唐麗均;李云;潘英俊;;機(jī)會網(wǎng)絡(luò)中無線鏈路統(tǒng)計特性的研究[J];計算機(jī)工程;2011年07期

8 陳江丹,萬雪梅;氣壓式泄漏檢測裝置及應(yīng)用[J];機(jī)電工程技術(shù);2001年01期

9 原羿,蘇鴻根;基于ZigBee技術(shù)的無線網(wǎng)絡(luò)應(yīng)用研究[J];計算機(jī)應(yīng)用與軟件;2004年06期

10 鄧建春;趙丹;;發(fā)動機(jī)前后油封氣密性檢測裝置的設(shè)計[J];液壓氣動與密封;2005年06期

，

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