行業動態
Industry dynamic-
202205-21
柴油發電機為什么無法運行？
柴(chai)(chai)油(you)發電(dian)(dian)機可(ke)(ke)能(neng)會損壞或無法正常運(yun)行(xing)的(de)原因有(you)很多。無論柴(chai)(chai)油(you)發電(dian)(dian)機安裝在(zai)何(he)(he)處，問(wen)題(ti)都可(ke)(ke)能(neng)發生，因此在(zai)修復問(wen)題(ti)之(zhi)前確(que)定問(wen)題(ti)是什么很重要。 那么柴(chai)(chai)油(you)發電(dian)(dian)機出(chu)現故障的(de)原因有(you)哪些呢？ 電(dian)(dian)瓶(ping) 與(yu)汽車類(lei)似，柴(chai)(chai)油(you)發電(dian)(dian)機需要有(you)良好(hao)的(de)電(dian)(dian)瓶(ping)壽命(ming)以確(que)保它有(you)電(dian)(dian)。如(ru)果電(dian)(dian)瓶(ping)出(chu)現故障或連接(jie)不正確(que)，則發電(dian)(dian)機很可(ke)(ke)能(neng)無法正常運(yun)轉。測試發電(dian)(dian)機電(dian)(dian)瓶(ping)電(dian)(dian)量(liang)并在(zai)超出(chu)保質(zhi)期時(shi)更換。 燃料(liao)(liao) 在(zai)處理柴(chai)(chai)油(you)發電(dian)(dian)機故障時(shi)，很容易忽(hu)略(lve)燃料(liao)(liao)水平。檢查燃油(you)油(you)位以確(que)保其繼續運(yun)行(xing)而不會出(chu)現任何(he)(he)問(wen)題(ti)。切勿讓燃料(liao)(liao)耗盡，以保證發電(dian)(dian)機繼續正常運(yun)行(xing)。 未設置為自動(dong) -
202205-20
關于箱式變壓器與自動化的討論
隨著我國經濟的快速發(fa)展(zhan)，逐(zhu)漸擴(kuo)大了配(pei)(pei)網(wang)自(zi)(zi)動(dong)(dong)化(hua)(hua)建(jian)(jian)(jian)設規(gui)模(mo)，然而當前在(zai)在(zai)建(jian)(jian)(jian)設以及使用(yong)(yong)過(guo)程(cheng)中還存(cun)在(zai)著許多的問題，導致在(zai)應用(yong)(yong)配(pei)(pei)電(dian)自(zi)(zi)動(dong)(dong)化(hua)(hua)時沒(mei)(mei)有在(zai)配(pei)(pei)網(wang)調度(du)業務(wu)(wu)中充分發(fa)揮出(chu)自(zi)(zi)身(shen)作用(yong)(yong)，沒(mei)(mei)有確(que)(que)保(bao)供(gong)電(dian)整體可(ke)靠性(xing)(xing)。因此，在(zai)進(jin)(jin)行配(pei)(pei)網(wang)調度(du)業務(wu)(wu)時，需要深入(ru)了解配(pei)(pei)電(dian)自(zi)(zi)動(dong)(dong)化(hua)(hua)自(zi)(zi)身(shen)特征，明(ming)確(que)(que)目標和(he)思(si)路，合理優化(hua)(hua)配(pei)(pei)網(wang)自(zi)(zi)動(dong)(dong)化(hua)(hua)設計方案，構建(jian)(jian)(jian)完善的配(pei)(pei)網(wang)調度(du)業務(wu)(wu)管理制度(du)，不(bu)斷(duan)提升(sheng)工作人(ren)員自(zi)(zi)身(shen)專業素養。通過(guo)充分展(zhan)現出(chu)配(pei)(pei)電(dian)自(zi)(zi)動(dong)(dong)化(hua)(hua)自(zi)(zi)身(shen)功(gong)(gong)能和(he)價值，從而確(que)(que)保(bao)配(pei)(pei)網(wang)整體運行的安全性(xing)(xing)。 1簡述配(pei)(pei)網(wang)調度(du)業務(wu)(wu) 在(zai)進(jin)(jin)行配(pei)(pei)網(wang)調度(du)業務(wu)(wu)過(guo)程(cheng)中，需要通過(guo)自(zi)(zi)身(shen)功(gong)(gong)能以及職 -
202205-19
如何為企業選擇合適的柴油發電機組呢
為(wei)了選擇適合您的(de)(de)(de)(de)(de)企業需(xu)(xu)要(yao)(yao)的(de)(de)(de)(de)(de)柴(chai)油(you)發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)組(zu)(zu)，您必須要(yao)(yao)先了解柴(chai)油(you)發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)要(yao)(yao)連接的(de)(de)(de)(de)(de)設(she)備所需(xu)(xu)的(de)(de)(de)(de)(de)總功(gong)率以及電(dian)(dian)(dian)(dian)源類型。與此同時(shi)，還需(xu)(xu)要(yao)(yao)根據具體情況確(que)定(ding)(ding)是否(fou)需(xu)(xu)要(yao)(yao)移動拖車式柴(chai)油(you)發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)或固定(ding)(ding)安裝的(de)(de)(de)(de)(de)柴(chai)油(you)發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)組(zu)(zu)。最后，還需(xu)(xu)要(yao)(yao)確(que)定(ding)(ding)是否(fou)需(xu)(xu)要(yao)(yao)電(dian)(dian)(dian)(dian)壓(ya)調節系(xi)統，一(yi)般(ban)來說，該系(xi)統可使(shi)輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)平滑，以避免損壞將(jiang)連接到柴(chai)油(you)發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)組(zu)(zu)的(de)(de)(de)(de)(de)一(yi)些精(jing)密(mi)電(dian)(dian)(dian)(dian)子設(she)備。 首先，要(yao)(yao)確(que)定(ding)(ding)您的(de)(de)(de)(de)(de)準備購買的(de)(de)(de)(de)(de)柴(chai)油(you)發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)組(zu)(zu)需(xu)(xu)要(yao)(yao)多少功(gong)率？ 要(yao)(yao)確(que)定(ding)(ding)所需(xu)(xu)的(de)(de)(de)(de)(de)柴(chai)油(you)發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)(ji)組(zu)(zu)需(xu)(xu)要(yao)(yao)多少功(gong)率，不僅(jin)需(xu)(xu)要(yao)(yao)知(zhi)道將(jiang)同時(shi)運行的(de)(de)(de)(de)(de)設(she)備的(de)(de)(de)(de)(de)總功(gong)率，還要(yao)(yao)知(zhi)道峰值(zhi)功(gong)耗，尤其是在啟動時(shi)。例(li)如，電(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)在啟動時(shi) -
202205-18
箱式變壓器電力信息技術的應用趨勢
1技(ji)(ji)(ji)(ji)術(shu)(shu)全(quan)(quan)球(qiu)化發(fa)(fa)(fa)(fa)(fa)展 我(wo)國(guo)的(de)箱式變壓器(qi)電(dian)子(zi)(zi)(zi)(zi)信息(xi)技(ji)(ji)(ji)(ji)術(shu)(shu)產(chan)(chan)業(ye)(ye)相(xiang)對(dui)于西方國(guo)家(jia)來講起步較晚，在特殊領(ling)域(yu)先進程度上存在一定差距。國(guo)家(jia)對(dui)電(dian)子(zi)(zi)(zi)(zi)產(chan)(chan)品(pin)核心技(ji)(ji)(ji)(ji)術(shu)(shu)的(de)掌(zhang)控刻(ke)不容緩，各企(qi)業(ye)(ye)要把發(fa)(fa)(fa)(fa)(fa)展重心放在研(yan)發(fa)(fa)(fa)(fa)(fa)產(chan)(chan)品(pin)上，轉(zhuan)變現(xian)今電(dian)子(zi)(zi)(zi)(zi)行業(ye)(ye)的(de)不利地位，獲得技(ji)(ji)(ji)(ji)術(shu)(shu)主(zhu)動權，利用全(quan)(quan)球(qiu)化市場(chang)貿易(yi)生(sheng)產(chan)(chan)流通(tong)渠道，國(guo)家(jia)將更多的(de)精力放在創(chuang)新和研(yan)發(fa)(fa)(fa)(fa)(fa)高(gao)精尖電(dian)子(zi)(zi)(zi)(zi)信息(xi)技(ji)(ji)(ji)(ji)術(shu)(shu)上，實現(xian)我(wo)國(guo)電(dian)子(zi)(zi)(zi)(zi)信息(xi)技(ji)(ji)(ji)(ji)術(shu)(shu)的(de)高(gao)端化發(fa)(fa)(fa)(fa)(fa)展。 2發(fa)(fa)(fa)(fa)(fa)展光(guang)(guang)電(dian)子(zi)(zi)(zi)(zi)技(ji)(ji)(ji)(ji)術(shu)(shu) 光(guang)(guang)電(dian)子(zi)(zi)(zi)(zi)技(ji)(ji)(ji)(ji)術(shu)(shu)作(zuo)為一項新的(de)發(fa)(fa)(fa)(fa)(fa)明(ming)創(chuang)造，與電(dian)子(zi)(zi)(zi)(zi)技(ji)(ji)(ji)(ji)術(shu)(shu)相(xiang)輔相(xiang)成，是電(dian)子(zi)(zi)(zi)(zi)技(ji)(ji)(ji)(ji)術(shu)(shu)的(de)升級。我(wo)國(guo)的(de)光(guang)(guang)電(dian)子(zi)(zi)(zi)(zi)技(ji)(ji)(ji)(ji)術(shu)(shu)目前處(chu)于研(yan)發(fa)(fa)(fa)(fa)(fa)階段，并沒(mei)有應(ying)用到(dao)實際生(sheng)產(chan)(chan)中， -
202205-17
柴油發電機組是由哪些設備組成的呢？
柴油(you)(you)(you)(you)發(fa)電(dian)(dian)機(ji)組(zu)，是由發(fa)動(dong)機(ji)、發(fa)電(dian)(dian)機(ji)（交流發(fa)電(dian)(dian)機(ji)）組(zu)成的(de)(de)設備(bei)單元，用于(yu)從燃(ran)(ran)料(liao)(liao)中產生電(dian)(dian)能。在這種情(qing)況(kuang)下，我們(men)正在研究一種柴油(you)(you)(you)(you)形式(shi)的(de)(de)發(fa)動(dong)機(ji)發(fa)電(dian)(dian)機(ji)，其中柴油(you)(you)(you)(you)壓縮點火(huo)發(fa)動(dong)機(ji)以柴油(you)(you)(you)(you)燃(ran)(ran)料(liao)(liao)運行，許多企業和其他(ta)組(zu)織依靠(kao)它們(men)在停電(dian)(dian)、缺(que)電(dian)(dian)時(shi)或無電(dian)(dian)網供應時(shi)區域(yu)提供所需(xu)(xu)的(de)(de)電(dian)(dian)力。 燃(ran)(ran)油(you)(you)(you)(you)系統 這通常是發(fa)動(dong)機(ji)的(de)(de)柴油(you)(you)(you)(you)燃(ran)(ran)料(liao)(liao)供應。最明顯的(de)(de)部(bu)(bu)分是一個油(you)(you)(you)(you)箱，可(ke)以容納至少6-8小時(shi)運行所需(xu)(xu)的(de)(de)燃(ran)(ran)料(liao)(liao)。對于(yu)較小的(de)(de)或便攜式(shi)柴油(you)(you)(you)(you)發(fa)電(dian)(dian)機(ji)，該油(you)(you)(you)(you)箱可(ke)能位于(yu)發(fa)電(dian)(dian)機(ji)外殼內，或者(zhe)對于(yu)較大的(de)(de)永(yong)久安裝(zhuang)單元，它可(ke)能是單獨的(de)(de)外部(bu)(bu)結構。燃(ran)(ran)油(you)(you)(you)(you)系統的(de)(de)其他(ta)部(bu)(bu)分包(bao)括(kuo)將燃(ran)(ran)油(you)(you)(you)(you)輸(shu)送 -
202205-16
為什么商用柴油發電機需要自動轉換開關（ATS）
就(jiu)是(shi)(shi)(shi)為(wei)什么(me)我們不遺余(yu)力地保持(chi)電(dian)(dian)力的(de)(de)(de)正常供應，即(ji)使在當地電(dian)(dian)力系統(tong)出現故障(zhang)時也是(shi)(shi)(shi)如(ru)(ru)此(ci)。那么(me)，在市場中(zhong)保持(chi)領先的(de)(de)(de)關(guan)鍵是(shi)(shi)(shi)什么(me)？在您(nin)的(de)(de)(de)企業(ye)安(an)裝帶有(you)(you)自(zi)動轉(zhuan)換開(kai)關(guan)的(de)(de)(de)備用(yong)(yong)柴(chai)油發(fa)電(dian)(dian)機(ji)！ 任何(he)不能延遲恢(hui)復供電(dian)(dian)的(de)(de)(de)企業(ye)都應該(gai)擁有(you)(you)一臺帶有(you)(you)自(zi)動轉(zhuan)換開(kai)關(guan)的(de)(de)(de)柴(chai)油發(fa)電(dian)(dian)機(ji)。ATS是(shi)(shi)(shi)一種為(wei)您(nin)的(de)(de)(de)員(yuan)工和(he)客戶(hu)保證(zheng)電(dian)(dian)力的(de)(de)(de)安(an)全方式(shi)。 盡管可以在沒(mei)有(you)(you)ATS的(de)(de)(de)情(qing)況下(xia)安(an)裝和(he)使用(yong)(yong)備用(yong)(yong)柴(chai)油發(fa)電(dian)(dian)機(ji)，但自(zi)動開(kai)關(guan)可確保在接(jie)到通知后立即(ji)無縫轉(zhuan)換電(dian)(dian)源。有(you)(you)手(shou)動轉(zhuan)換開(kai)關(guan)，但必須手(shou)動打開(kai)和(he)關(guan)閉(bi)。這對許多企業(ye)來說既麻煩又浪費時間。例如(ru)(ru)，如(ru)(ru)果(guo)您(nin)擁有(you)(you)一家餐館，并且(qie)在半夜 -
202205-14
通過巡檢保障箱式變壓器的安全性
引言 電(dian)(dian)(dian)(dian)(dian)力(li)(li)設(she)(she)(she)(she)備(bei)巡(xun)(xun)檢(jian)(jian)(jian)工作的(de)(de)主要目(mu)的(de)(de)是(shi)確認箱式變電(dian)(dian)(dian)(dian)(dian)站、輸電(dian)(dian)(dian)(dian)(dian)線(xian)路(lu)和配電(dian)(dian)(dian)(dian)(dian)線(xian)路(lu)的(de)(de)安全。通(tong)過巡(xun)(xun)檢(jian)(jian)(jian)工作，可以了解(jie)電(dian)(dian)(dian)(dian)(dian)線(xian)和電(dian)(dian)(dian)(dian)(dian)力(li)(li)設(she)(she)(she)(she)備(bei)的(de)(de)運行，找出設(she)(she)(she)(she)備(bei)的(de)(de)缺陷以及(ji)損壞設(she)(she)(she)(she)備(bei)和電(dian)(dian)(dian)(dian)(dian)線(xian)的(de)(de)潛(qian)在(zai)(zai)安全隱患，提出相應的(de)(de)巡(xun)(xun)檢(jian)(jian)(jian)內(nei)容以消除缺陷。當前，中國大(da)多數(shu)電(dian)(dian)(dian)(dian)(dian)力(li)(li)公司設(she)(she)(she)(she)備(bei)巡(xun)(xun)檢(jian)(jian)(jian)效率低下，勞動強度大(da)，電(dian)(dian)(dian)(dian)(dian)力(li)(li)設(she)(she)(she)(she)備(bei)智能(neng)檢(jian)(jian)(jian)測系統(tong)的(de)(de)實(shi)現(xian)要依靠電(dian)(dian)(dian)(dian)(dian)力(li)(li)設(she)(she)(she)(she)備(bei)各(ge)環節運行參(can)數(shu)的(de)(de)在(zai)(zai)線(xian)監(jian)測和實(shi)時信息控制，物(wu)聯網是(shi)智能(neng)電(dian)(dian)(dian)(dian)(dian)網巡(xun)(xun)檢(jian)(jian)(jian)技(ji)術發(fa)展的(de)(de)背后(hou)推動力(li)(li)。只有通(tong)過各(ge)種(zhong)網絡的(de)(de)互連，才能(neng)提高電(dian)(dian)(dian)(dian)(dian)力(li)(li)系統(tong)的(de)(de)信息水(shui)平，并(bing)實(shi)現(xian)電(dian)(dian)(dian)(dian)(dian)氣設(she)(she)(she)(she)備(bei)巡(xun)(xun)檢(jian)(jian)(jian)系統(tong)的(de)(de)智能(neng)化。 1電(dian)(dian)(dian)(dian)(dian)力(li)(li)設(she)(she)(she)(she)備(bei)巡(xun)(xun)檢(jian)(jian)(jian)目(mu)的(de)(de) 電(dian)(dian)(dian)(dian)(dian)力(li)(li)設(she)(she)(she)(she)備(bei)巡(xun)(xun)檢(jian)(jian)(jian)是(shi) -
202205-13
為什么說柴油發電機對數據中心至關重要？
每個數(shu)(shu)據(ju)中(zhong)心(xin)都依(yi)賴于(yu)一(yi)個關鍵(jian)的(de)(de)、共同的(de)(de)因(yin)素，它(ta)(ta)們(men)都離不開：持續且(qie)穩定的(de)(de)電力(li)。如果沒有電源(yuan)，數(shu)(shu)據(ju)就不會(hui)被處理(li)、存儲、修改(gai)或(huo)查(cha)詢(xun)。而且(qie)設(she)(she)(she)備本(ben)身不會(hui)運行。因(yin)此，雖然數(shu)(shu)據(ju)中(zhong)心(xin)可(ke)以(yi)成(cheng)為(wei)信息管理(li)和(he)(he)企(qi)業基礎(chu)設(she)(she)(she)施的(de)(de)驚人工具，但(dan)(dan)它(ta)(ta)們(men)的(de)(de)致命(ming)弱點是它(ta)(ta)們(men)與電源(yuan)的(de)(de)非常(chang)簡單的(de)(de)連接。 許多公司從當地電網獲(huo)得的(de)(de)可(ke)靠服務常(chang)常(chang)讓(rang)我們(men)忘(wang)記在(zai)出(chu)現問題時(shi)失去這(zhe)(zhe)種連接是多么容易(yi)。但(dan)(dan)是會(hui)發(fa)生停電和(he)(he)缺(que)電，而且(qie)通常(chang)發(fa)生在(zai)人們(men)和(he)(he)企(qi)業最(zui)需要電力(li)的(de)(de)最(zui)糟糕的(de)(de)時(shi)候。這(zhe)(zhe)就是為(wei)什(shen)么數(shu)(shu)據(ju)中(zhong)心(xin)備用電源(yuan)在(zai)設(she)(she)(she)計中(zhong)絕對是必不可(ke)少的(de)(de)資(zi)源(yuan)，并構成(cheng)功能數(shu)(shu)據(ju)中(zhong)心(xin)的(de)(de)災難或(huo)故障 -
202205-12
箱式電力變壓器局部放電帶電檢測技術
(1)光(guang)學(xue)檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)(ce)法(fa)(fa)(fa)。將電(dian)力變壓器(qi)局(ju)部(bu)(bu)(bu)放電(dian)時產生的(de)(de)(de)(de)光(guang)和熱經過光(guang)電(dian)轉(zhuan)化(hua)，利用光(guang)電(dian)探測(ce)(ce)(ce)(ce)(ce)儀檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)(ce)這(zhe)些光(guang)輻射(she)信號，實(shi)現局(ju)部(bu)(bu)(bu)識別放電(dian)情況。但(dan)是(shi)這(zhe)種檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)(ce)方法(fa)(fa)(fa)因為(wei)成本問(wen)題比較受限，隨著科技的(de)(de)(de)(de)進化(hua)和發展，光(guang)檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)(ce)法(fa)(fa)(fa)已經可以(yi)對(dui)變壓器(qi)內外部(bu)(bu)(bu)進行良好的(de)(de)(de)(de)檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)(ce)，獲知局(ju)部(bu)(bu)(bu)放電(dian)的(de)(de)(de)(de)大小和回數，考慮到設(she)備昂貴，以(yi)及(ji)對(dui)檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)(ce)準確度和操(cao)作水平的(de)(de)(de)(de)要求，單獨(du)應用仍不(bu)常見(jian)，以(yi)聯合(he)法(fa)(fa)(fa)與聲測(ce)(ce)(ce)(ce)(ce)法(fa)(fa)(fa)結合(he)。(2)紅(hong)(hong)(hong)外檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)(ce)法(fa)(fa)(fa)。紅(hong)(hong)(hong)外熱成像監測(ce)(ce)(ce)(ce)(ce)法(fa)(fa)(fa)依據的(de)(de)(de)(de)是(shi)高(gao)壓設(she)備在局(ju)部(bu)(bu)(bu)放電(dian)時某部(bu)(bu)(bu)位(wei)的(de)(de)(de)(de)溫度反應，若變壓器(qi)被測(ce)(ce)(ce)(ce)(ce)的(de)(de)(de)(de)部(bu)(bu)(bu)位(wei)溫度高(gao)于絕(jue)對(dui)溫度，可以(yi)熱成像系統來檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)(ce)熱能(neng)轉(zhuan)化(hua)出來的(de)(de)(de)(de)紅(hong)(hong)(hong)外輻 -
202205-10
商用柴油發電機應該多久測試一次？
隨著柴(chai)油(you)發電(dian)(dian)(dian)(dian)機(ji)成為眾多行(xing)業(ye)(ye)的(de)備(bei)用(yong)或常用(yong)電(dian)(dian)(dian)(dian)源設(she)(she)備(bei)，對(dui)于如(ru)(ru)何正確(que)使(shi)用(yong)柴(chai)油(you)發電(dian)(dian)(dian)(dian)機(ji)也成為許多人(ren)關心的(de)問題，如(ru)(ru)果發生停(ting)(ting)電(dian)(dian)(dian)(dian)，柴(chai)油(you)發電(dian)(dian)(dian)(dian)機(ji)將可(ke)為各種生產制造設(she)(she)備(bei)、電(dian)(dian)(dian)(dian)器、辦公(gong)設(she)(she)備(bei)等(deng)提供(gong)電(dian)(dian)(dian)(dian)力支(zhi)持并最大限度地減少停(ting)(ting)電(dian)(dian)(dian)(dian)間隔。 那么(me)，應該多久使(shi)用(yong)一(yi)次(ci)柴(chai)油(you)發電(dian)(dian)(dian)(dian)機(ji)？ 將測(ce)試發電(dian)(dian)(dian)(dian)機(ji)組視為對(dui)其進(jin)行(xing)保(bao)養。正如(ru)(ru)人(ren)體需(xu)要(yao)鍛(duan)煉(lian)以保(bao)持健康一(yi)樣，商用(yong)柴(chai)油(you)發電(dian)(dian)(dian)(dian)機(ji)必須定期運行(xing)以防止問題的(de)出現(xian)，比(bi)如(ru)(ru)，未燃(ran)燒(shao)的(de)柴(chai)油(you)燃(ran)料會積聚(ju)在排(pai)氣系(xi)統中并損(sun)壞噴油(you)器。對(dui)發電(dian)(dian)(dian)(dian)機(ji)進(jin)行(xing)測(ce)試還可(ke)以保(bao)持系(xi)統潤(run)滑、為電(dian)(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)(dian)并阻止可(ke)能最終阻礙設(she)(she)備(bei)性能的(de)水分積聚(ju)。 商業(ye)(ye)備(bei)用(yong)