更新(xin)時(shi)間:2023-11-11
湖(hu)北高低溫(wen)(wen)沖擊試(shi)驗(yan)箱根據熱傳導的(de)(de)原(yuan)理分析(xi),箱壁(bi)附近氣(qi)流(liu)的(de)(de)溫(wen)(wen)度(du)通常與(yu)流(liu)場中心溫(wen)(wen)度(du)相(xiang)差2~3℃,在高低溫(wen)(wen)的(de)(de)上(shang)下*,還可(ke)能達到5℃。箱壁(bi)的(de)(de)溫(wen)(wen)度(du)與(yu)箱壁(bi)附近流(liu)場的(de)(de)溫(wen)(wen)度(du)又相(xiang)差2~3℃(視箱壁(bi)的(de)(de)結構和材料而定),試(shi)驗(yan)溫(wen)(wen)度(du)與(yu)外界大氣(qi)環境相(xiang)差越大,上(shang)述溫(wen)(wen)差也越大,因此,距箱壁(bi)(100~150mm)距離(li)內的(de)(de)空間是(shi)不可(ke)利用(yong)空間。
湖北高低溫沖擊試驗箱試驗方法:
試(shi)(shi)驗(yan)(yan)樣(yang)(yang)品(pin)(pin)應按標準要(yao)求放置在試(shi)(shi)驗(yan)(yan)箱內(nei)(nei),并將試(shi)(shi)驗(yan)(yan)箱內(nei)(nei)溫度(du)(du)升到(dao)點,保持(chi)(chi)一定(ding)的(de)時(shi)間(jian)至試(shi)(shi)驗(yan)(yan)樣(yang)(yang)品(pin)(pin)達(da)到(dao)溫度(du)(du)穩(wen)定(ding)。這里要(yao)注意的(de)是切勿(wu)將試(shi)(shi)品(pin)(pin)電(dian)源(yuan)接(jie)(jie)入設備電(dian)源(yuan)中,否則會增加設備電(dian)源(yuan)負荷(he),除非設備留(liu)有(you)試(shi)(shi)品(pin)(pin)電(dian)源(yuan)接(jie)(jie)口(kou)。等(deng)高(gao)溫階段結(jie)(jie)束后,在5min內(nei)(nei)將試(shi)(shi)驗(yan)(yan)樣(yang)(yang)品(pin)(pin)轉(zhuan)換到(dao)已調節(jie)到(dao)-55℃的(de)低溫試(shi)(shi)驗(yan)(yan)箱內(nei)(nei),保持(chi)(chi)1h或者(zhe)直至試(shi)(shi)驗(yan)(yan)樣(yang)(yang)品(pin)(pin)達(da)到(dao)溫度(du)(du)穩(wen)定(ding)。試(shi)(shi)驗(yan)(yan)過(guo)程中或試(shi)(shi)驗(yan)(yan)剛結(jie)(jie)束時(shi),如需打開箱門(men)要(yao)特別(bie)小心,以(yi)免凍傷。然(ran)后低溫階段結(jie)(jie)束后,在5min內(nei)(nei)將試(shi)(shi)驗(yan)(yan)樣(yang)(yang)品(pin)(pin)轉(zhuan)換到(dao)已調節(jie)到(dao)70℃的(de)高(gao)溫試(shi)(shi)驗(yan)(yan)箱內(nei)(nei),保持(chi)(chi)1h或者(zhe)直至試(shi)(shi)驗(yan)(yan)樣(yang)(yang)品(pin)(pin)達(da)到(dao)溫度(du)(du)穩(wen)定(ding)。試(shi)(shi)驗(yan)(yan)過(guo)程中或測(ce)試(shi)(shi)剛結(jie)(jie)束時(shi),如果(guo)需要(yao)打開箱門(men),開門(men)時(shi)要(yao)特別(bie)小心,要(yao)順著們開啟的(de)方(fang)向行(xing)走(zou),以(yi)免燙傷。還有(you)高(gao)溫熱氣(qi)(qi)沖出(chu)箱外十分危(wei)險,箱門(men)內(nei)(nei)側仍然(ran)保持(chi)(chi)高(gao)溫造成(cheng)燙傷,高(gao)溫空氣(qi)(qi)可能(neng)(neng)觸(chu)發火災(zai)警(jing)報。冷熱沖擊(ji)試(shi)(shi)驗(yan)(yan)箱重復上述實驗(yan)(yan)方(fang)法(fa)以(yi)完成(cheng)三個循(xun)環(huan)周期,根據(ju)樣(yang)(yang)件大(da)小與空間(jian)大(da)小,時(shi)間(jian)可能(neng)(neng)會略有(you)誤差。試(shi)(shi)驗(yan)(yan)樣(yang)(yang)品(pin)(pin)從試(shi)(shi)驗(yan)(yan)箱內(nei)(nei)取出(chu)后,應在正常的(de)試(shi)(shi)驗(yan)(yan)大(da)氣(qi)(qi)條件下(xia)進行(xing)恢復,直至試(shi)(shi)驗(yan)(yan)樣(yang)(yang)品(pin)(pin)達(da)到(dao)溫度(du)(du)穩(wen)定(ding),然(ran)后再對照標準中的(de)受損(sun)程度(du)(du)及其(qi)它方(fang)法(fa)進行(xing)檢測(ce)結(jie)(jie)果(guo)評定(ding)。
湖北高低溫沖擊試驗箱產品擺放方法:
首先,試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)品(pin)(pin)(pin)體積不(bu)(bu)(bu)要(yao)(yao)(yao)(yao)超過冷(leng)熱沖(chong)(chong)擊(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)機內箱(xiang)容積的(de)(de)(de)1/3。若(ruo)(ruo)超過則可能(neng)(neng)會影響(xiang)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)箱(xiang)內的(de)(de)(de)風道循環,從而(er)影響(xiang)均勻度(du)。然后(hou),試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)品(pin)(pin)(pin)的(de)(de)(de)擺放,應(ying)放置于冷(leng)熱沖(chong)(chong)擊(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)機箱(xiang)體中(zhong)中(zhong)間,不(bu)(bu)(bu)能(neng)(neng)遮(zhe)住上(shang)面(mian)的(de)(de)(de)風道,也不(bu)(bu)(bu)能(neng)(neng)直(zhi)接(jie)(jie)放在箱(xiang)體表面(mian),需(xu)要(yao)(yao)(yao)(yao)根據待測(ce)(ce)品(pin)(pin)(pin)的(de)(de)(de)大小、形狀(zhuang)、體重、數(shu)量來調節樣(yang)(yang)品(pin)(pin)(pin)架的(de)(de)(de)距離。接(jie)(jie)著(zhu),若(ruo)(ruo)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)品(pin)(pin)(pin)若(ruo)(ruo)是(shi)橡膠(jiao)類(lei)產品(pin)(pin)(pin),則需(xu)要(yao)(yao)(yao)(yao)用盤子墊著(zhu),以免高溫(wen)熔化后(hou)沾到樣(yang)(yang)品(pin)(pin)(pin)架上(shang)后(hou)續(xu)不(bu)(bu)(bu)好(hao)清洗。zui后(hou),需(xu)注意試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)樣(yang)(yang)品(pin)(pin)(pin)若(ruo)(ruo)是(shi)液體,一(yi)(yi)定要(yao)(yao)(yao)(yao)用容器盛好(hao),不(bu)(bu)(bu)能(neng)(neng)灑出來。若(ruo)(ruo)是(shi)易(yi)揮發、易(yi)然易(yi)爆、有(you)自然點的(de)(de)(de)樣(yang)(yang)品(pin)(pin)(pin)建(jian)議(yi)不(bu)(bu)(bu)要(yao)(yao)(yao)(yao)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan),若(ruo)(ruo)一(yi)(yi)定要(yao)(yao)(yao)(yao),溫(wen)度(du)切記不(bu)(bu)(bu)能(neng)(neng)太高。做試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)需(xu)要(yao)(yao)(yao)(yao)外接(jie)(jie)電源(yuan)測(ce)(ce)試(shi)(shi)(shi)(shi),要(yao)(yao)(yao)(yao)將線(xian)統一(yi)(yi)接(jie)(jie)到測(ce)(ce)試(shi)(shi)(shi)(shi)孔旁邊,千萬不(bu)(bu)(bu)要(yao)(yao)(yao)(yao)讓線(xian)纏(chan)繞在一(yi)(yi)起,以免危(wei)險發生。
箱體結構及材料:
1.外箱材料:雙面鍍鋅鋼板,表面噴塑處理;(可選擇:SUS#304不銹鋼)
2.內箱材料:不銹鋼板SUS#304;
3.箱體保溫材料:硬質聚氨酯泡沫+玻璃纖維;
4.門保溫材料:硬質聚氨酯泡沫
5.空氣調節通道:風機、加熱器、蒸發器、風門、溫度傳感器;
6.標準配置:樣(yang)品隔(ge)層架2個(ge)、調整(zheng)腳4個(ge)、調整(zheng)輪6個(ge)、電源線(xian)(長3米(mi))1條(tiao);
冷媒:
按照標準蒸發溫度(大氣壓力下),可把冷媒大致分為三類:
1、低溫冷媒:30℃時Pk值為20~70kg/cm2,標準蒸發溫度為≤-50℃。包含有R13、R14、R23、R503、甲烷、乙烷、乙烯等。
2、中溫冷媒:30℃時Pk值為3~20kg/cm2,標準蒸發溫度為<0℃。包含有R717、R12、R22、R500、R502、丙烯等。
3、高溫(wen)冷媒:30℃時(shi)Pk值為≤3kg/cm2,標準為蒸發溫(wen)度(du)為>0℃。R11、R21、R113、R114、R142等。
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湖北(bei)省武漢市經濟技術開發區東風大道(dao)楓(feng)樹產(chan)業園A區一樓廠房(fang)