[恒溫恒濕試驗箱]可(ke)程式恒溫恒濕(shi)試驗箱(xiang)的基(ji)本原(yuan)理

　　可程(cheng)式恒溫(wen)(wen)(wen)(wen)(wen)(wen)恒濕(shi)試驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)變化(hua)(hua)試驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)設(she)計：GB/T 2423.22-2002溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)變化(hua)(hua)試驗(yan)(yan)(yan)(yan)Na、Nb和Nc包含有(you)高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)和低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)時(shi)(shi)期(qi)的(de)(de)交替，從一(yi)種(zhong)濕(shi)度(du)(du)到(dao)另一(yi)種(zhong)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)轉換有(you)很明確規定，從室(shi)溫(wen)(wen)(wen)(wen)(wen)(wen)到(dao)**個條(tiao)件(jian)試驗(yan)(yan)(yan)(yan)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)，然后到(dao)第二個條(tiao)件(jian)試驗(yan)(yan)(yan)(yan)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)又(you)回(hui)到(dao)室(shi)溫(wen)(wen)(wen)(wen)(wen)(wen)，這個程(cheng)序(xu)構成一(yi)個試驗(yan)(yan)(yan)(yan)循環(huan)，高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)試驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)試驗(yan)(yan)(yan)(yan)參數：室(shi)溫(wen)(wen)(wen)(wen)(wen)(wen)、高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)、低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)、暴露(lu)、兩種(zhong)極端溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)之(zhi)(zhi)間暴露(lu)的(de)(de)時(shi)(shi)間間隔(ge)、試驗(yan)(yan)(yan)(yan)循環(huan)數，高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)和低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)是指周圍環(huan)境溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)，這些(xie)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)大多數試驗(yan)(yan)(yan)(yan)樣品會達到(dao)，但時(shi)(shi)間有(you)所(suo)滯后，只有(you)在例外的(de)(de)情況(kuang)下，才(cai)規定受試物品在正(zheng)常貯存或工(gong)作溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)范圍之(zhi)(zhi)外，溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)變化(hua)(hua)試驗(yan)(yan)(yan)(yan)是加(jia)速(su)的(de)(de)，因為(wei)在給定時(shi)(shi)間內(nei)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)急(ji)劇(ju)變化(hua)(hua)次數比現場條(tiao)件(jian)下所(suo)發生的(de)(de)要多。

　　可程式恒(heng)溫(wen)恒(heng)濕試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)箱試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)的(de)(de)目(mu)的(de)(de)和(he)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)方法的(de)(de)選擇：溫(wen)度(du)(du)(du)變(bian)(bian)化(hua)(hua)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)不(bu)作為(wei)**地模擬現場條(tiao)件的(de)(de)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，溫(wen)度(du)(du)(du)變(bian)(bian)化(hua)(hua)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)的(de)(de)目(mu)的(de)(de)是(shi)給予試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)樣(yang)品應(ying)力，以使(shi)確(que)(que)定(ding)(ding)(ding)它們的(de)(de)設(she)計或(huo)(huo)制造(zao)是(shi)否正確(que)(que)，在下列(lie)情況(kuang)，推薦進(jin)行溫(wen)度(du)(du)(du)變(bian)(bian)化(hua)(hua)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，評(ping)(ping)定(ding)(ding)(ding)溫(wen)度(du)(du)(du)變(bian)(bian)化(hua)(hua)期(qi)間(jian)的(de)(de)電氣性(xing)能，用(yong)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)Nb，評(ping)(ping)定(ding)(ding)(ding)溫(wen)度(du)(du)(du)變(bian)(bian)化(hua)(hua)期(qi)間(jian)的(de)(de)機(ji)械性(xing)能，用(yong)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)Nb，評(ping)(ping)定(ding)(ding)(ding)在規(gui)定(ding)(ding)(ding)的(de)(de)溫(wen)度(du)(du)(du)急劇變(bian)(bian)化(hua)(hua)次數后的(de)(de)電氣性(xing)能，用(yong)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)Na或(huo)(huo)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)Nc,評(ping)(ping)定(ding)(ding)(ding)部(bu)件的(de)(de)結構耐人工應(ying)力的(de)(de)適(shi)應(ying)性(xing)，用(yong)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)Na或(huo)(huo)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)Nc,標準(zhun)中所規(gui)定(ding)(ding)(ding)的(de)(de)溫(wen)度(du)(du)(du)變(bian)(bian)化(hua)(hua)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，不(bu)是(shi)用(yong)來評(ping)(ping)定(ding)(ding)(ding)在兩種極端(duan)溫(wen)度(du)(du)(du)的(de)(de)穩定(ding)(ding)(ding)狀態(tai)下工作時的(de)(de)材料常(chang)數或(huo)(huo)電氣性(xing)能的(de)(de)差別。

　　可程式(shi)恒(heng)溫恒(heng)濕(shi)試(shi)(shi)驗箱暴(bao)露時(shi)(shi)間(jian)(jian)(jian)(jian)(jian)的(de)(de)選擇：暴(bao)露時(shi)(shi)間(jian)(jian)(jian)(jian)(jian)取決于試(shi)(shi)驗樣(yang)品(pin)（或(huo)其(qi)(qi)易受損(sun)壞部分）達到周(zhou)圍空間(jian)(jian)(jian)(jian)(jian)或(huo)液槽溫度(du)(du)時(shi)(shi)的(de)(de)熱(re)(re)時(shi)(shi)間(jian)(jian)(jian)(jian)(jian)常數(shu)(shu)，因此(ci)搞清楚試(shi)(shi)驗樣(yang)品(pin)的(de)(de)熱(re)(re)時(shi)(shi)間(jian)(jian)(jian)(jian)(jian)常數(shu)(shu)是重(zhong)要的(de)(de)，由于大(da)件試(shi)(shi)驗樣(yang)品(pin)（設備(bei)）內部和外部的(de)(de)熱(re)(re)時(shi)(shi)間(jian)(jian)(jian)(jian)(jian)常數(shu)(shu)可能相(xiang)差很大(da)，故以考慮里(li)面或(huo)易受兵貴(gui)神速部分的(de)(de)熱(re)(re)時(shi)(shi)間(jian)(jian)(jian)(jian)(jian)常數(shu)(shu)為(wei)妥，試(shi)(shi)驗樣(yang)品(pin)的(de)(de)熱(re)(re)時(shi)(shi)間(jian)(jian)(jian)(jian)(jian)常數(shu)(shu)取決于周(zhou)圍介質(zhi)（在(zai)試(shi)(shi)驗Na和Nb中是空氣，在(zai)試(shi)(shi)驗Nc中是水或(huo)其(qi)(qi)他液體(ti)）的(de)(de)性質(zhi)和運動速度(du)(du)，因此(ci)，希望在(zai)試(shi)(shi)驗時(shi)(shi)的(de)(de)實際周(zhou)圍條件中通(tong)過(guo)試(shi)(shi)驗把它測定(ding)出(chu)來。

　　廣(guang)東劍喬試(shi)(shi)(shi)驗(yan)設(she)(she)備有限公司是(shi)專注于振(zhen)動(dong)及環(huan)境試(shi)(shi)(shi)驗(yan)設(she)(she)備研發、生(sheng)產、銷(xiao)售大型(xing)生(sheng)產廠家,主營產品：振(zhen)動(dong)臺(tai)、振(zhen)動(dong)試(shi)(shi)(shi)驗(yan)機、振(zhen)動(dong)試(shi)(shi)(shi)驗(yan)臺(tai)、沖(chong)擊(ji)試(shi)(shi)(shi)驗(yan)臺(tai)、沖(chong)擊(ji)試(shi)(shi)(shi)驗(yan)機、老化(hua)房、恒(heng)溫恒(heng)濕(shi)試(shi)(shi)(shi)驗(yan)室、恒(heng)溫恒(heng)濕(shi)機、快速溫變(bian)試(shi)(shi)(shi)驗(yan)箱(xiang)(xiang)、高低溫試(shi)(shi)(shi)驗(yan)箱(xiang)(xiang)、冷(leng)(leng)熱沖(chong)擊(ji)試(shi)(shi)(shi)驗(yan)箱(xiang)(xiang)、冷(leng)(leng)熱沖(chong)擊(ji)箱(xiang)(xiang)、恒(heng)溫恒(heng)濕(shi)箱(xiang)(xiang)、恒(heng)溫恒(heng)濕(shi)試(shi)(shi)(shi)驗(yan)箱(xiang)(xiang)等產品。