1. 大多數(shù)網(wǎng)絡(luò)機(jī)柜使用螺絲擋板來(lái)?yè)踝CI等插槽的空位，但仍有相當(dāng)一部分使用了一次性沖成的擋板，對(duì)于這種機(jī)箱，每次安裝新的PCI卡時(shí)，都不得不把主板拆下來(lái)才行，安裝相當(dāng)麻煩。
1. Most network cabinets use screw baffles to block the empty slots of PCI and other slots, but a considerable part still use disposable baffles. For this kind of chassis, the motherboard has to be removed every time a new PCI card is installed, which is quite troublesome.
2.不可拆卸的前面板
2. Non removable front panel
大多數(shù)的網(wǎng)絡(luò)機(jī)柜的塑料前面板都是用卡子或螺絲固定在箱體上的，可以拆卸下來(lái)，但也有少數(shù)機(jī)箱是用塑料鉚釘固定在機(jī)箱前架上的，一旦出現(xiàn)開(kāi)機(jī)開(kāi)關(guān)卡死，或指示燈脫落需要卸下面板修理時(shí)，這種不可拆卸前面板的機(jī)箱就是一個(gè)嚴(yán)重的問(wèn)題。
The plastic front panel of most network cabinets is fixed on the box with clips or screws and can be removed, but a few cases are fixed on the front frame of the box with plastic rivets. Once the power on switch is stuck or the indicator light falls off and needs to be removed for repair, this non removable front panel case is a serious problem.
3.風(fēng)扇設(shè)計(jì)的謬誤
3. Fallacy of fan design
風(fēng)扇并不是越多越好，網(wǎng)絡(luò)機(jī)柜風(fēng)扇的設(shè)計(jì)是一個(gè)系統(tǒng)工程，設(shè)計(jì)時(shí)關(guān)注“風(fēng)道”、風(fēng)孔大小和風(fēng)孔位置、進(jìn)風(fēng)值與出風(fēng)值的匹配等單純靠增加風(fēng)扇數(shù)量，可能會(huì)導(dǎo)致風(fēng)力相互抵消，反而使熱量無(wú)法排出。
The more fans are not the better. The design of network cabinet fans is a systematic project. During the design, attention is paid to the "air duct", the size and location of air holes, the matching of inlet and outlet values, etc. simply increasing the number of fans may cause the wind force to offset each other, but the heat cannot be discharged.
網(wǎng)絡(luò)機(jī)柜的側(cè)板風(fēng)扇，應(yīng)該選擇大型低速的進(jìn)風(fēng)風(fēng)扇。網(wǎng)絡(luò)機(jī)柜頂部的風(fēng)扇，位置應(yīng)盡量靠后。風(fēng)扇設(shè)計(jì)中的一個(gè)常見(jiàn)問(wèn)題，就是不為風(fēng)扇安裝過(guò)濾網(wǎng)，這樣會(huì)使電磁屏蔽性能下降，同時(shí)也會(huì)使風(fēng)扇積灰。
For the side plate fan of the network cabinet, a large low-speed air inlet fan should be selected. The fan on the top of the network cabinet should be located as far back as possible. A common problem in fan design is that the filter screen is not installed for the fan, which will not only reduce the electromagnetic shielding performance, but also cause the fan to accumulate dust.
4.卡式結(jié)構(gòu)的問(wèn)題
4. Problems of card structure
卡式結(jié)構(gòu)雖然方便，但這種設(shè)計(jì)的大問(wèn)題就在于它對(duì)配件的尺寸公差要求比較嚴(yán)格，不像螺 釘結(jié)構(gòu)那樣允許配件有的“錯(cuò)位”，如果強(qiáng)行裝上，會(huì)帶來(lái)配件變形的隱患。
Although the card structure is convenient, the big problem of this design is that it has strict requirements on the dimensional tolerance of accessories. Unlike the screw structure, it allows some "dislocation" of accessories. If it is forcibly installed, it will bring the hidden danger of deformation of accessories.
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