Bussiness ManagementMBAstrategyHuman ResourceMarketingHospitalityE-commerceInternational Tradingproject managementmedia managementLogisticsFinanceAccountingadvertisingLawBusiness LawEducationEconomicsBusiness Reportbusiness planresearch proposal
英语论文题目英语教学英语论文商务英语英语论文格式商务英语翻译广告英语商务英语商务英语教学英语翻译论文英美文学英语语言学文化交流中西方文化差异英语论文范文英语论文开题报告初中英语教学英语论文文献综述英语论文参考文献
ResumeRecommendation LetterMotivation LetterPSapplication letterMBA essayBusiness Letteradmission letter Offer letter
澳大利亚论文英国论文加拿大论文芬兰论文瑞典论文澳洲论文新西兰论文法国论文香港论文挪威论文美国论文泰国论文马来西亚论文台湾论文新加坡论文荷兰论文南非论文西班牙论文爱尔兰论文
小学英语教学初中英语教学英语语法高中英语教学大学英语教学听力口语英语阅读英语词汇学英语素质教育英语教育毕业英语教学法
英语论文开题报告英语毕业论文写作指导英语论文写作笔记handbook英语论文提纲英语论文参考文献英语论文文献综述Research Proposal代写留学论文代写留学作业代写Essay论文英语摘要英语论文任务书英语论文格式专业名词turnitin抄袭检查
temcet听力雅思考试托福考试GMATGRE职称英语理工卫生职称英语综合职称英语职称英语
经贸英语论文题目旅游英语论文题目大学英语论文题目中学英语论文题目小学英语论文题目英语文学论文题目英语教学论文题目英语语言学论文题目委婉语论文题目商务英语论文题目最新英语论文题目英语翻译论文题目英语跨文化论文题目
日本文学日本语言学商务日语日本历史日本经济怎样写日语论文日语论文写作格式日语教学日本社会文化日语开题报告日语论文选题
职称英语理工完形填空历年试题模拟试题补全短文概括大意词汇指导阅读理解例题习题卫生职称英语词汇指导完形填空概括大意历年试题阅读理解补全短文模拟试题例题习题综合职称英语完形填空历年试题模拟试题例题习题词汇指导阅读理解补全短文概括大意
论文作者:anter论文属性:讲稿 Lecture Notes登出时间:2010-11-27编辑:anterran点击率:12363
论文字数:5342论文编号:org201011271118394385语种:中文 Chinese地区:中国价格:免费论文
High pressure switch 高压开关
A pressure switch is fitted in the high-pressure side of the system. It can be placed in a selection of locations but it will always be found somewhere in the high pressure part of the circuit in between the compressor output and the thermal expansion valve. Two pressure sensitive switches (diaphragm operated) are located into the one unit. 在系统的高压侧装有一个压力开关。它可以被安装在几个位置上,但这些位置仅限于线路的高压侧,且在压缩机输出端和热力膨胀阀之间。两个隔板操控的压力感应开关被安装在一个元件中。
The two switches combined are able to indicate three conditions. The first switch (switch 1), under normal operating pressures (typically 15 bar) will be in its closed or in its “on” state. If the pressure applied to it by the refrigerant is too high (26-30 bar), the switch contacts will open. Once the circuit is broken the amplifier detects the voltage change in this circuit and de-energises the magnetic clutch relay, turning the compressor off. This is done to prevent the system over-pressurising which could cause permanent damage to numerous components in the circuit. Conversely, if the pressure in the high pressure part of the circuit drops significantly (to 1–2 bar), the same switch opens in the other direction, again opening the contacts. This again leads to the same outcome of turning off the compressor. The most likely cause of such low pressure in the high pressure side of the system would be insufficient refrigerant. As the refrigerant is used as a ‘vehicle’ for the system’s lubricating oil, this could lead to seizure, hence the action of switching off the compressor. 两个开关共同作用,结果有三种情况。第一个开关,即开关1,在正常工作电压(15巴)下是闭合的或者状态为“on”(运行)。如果制冷剂对它施加压强太高(26-30巴),开关触点将本论文由英语论文网提供整理,提供论文代写,英语论文代写,代写论文,代写英语论文,代写留学生论文,代写英文论文,留学生论文代写相关核心关键词搜索。