请教冰箱制冷问题。

老孔雀

冰箱下面的冰冻部分完好，就是上面的制冷部分不制冷了，有人知道是什么原因吗？谢谢。

AASTAR

most time the problem is that the airway is blocked.

MrElectrician

1# 老孔雀
Not an expert at HVAC, just for your reference.
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Components of a common domestic refrigerator have 4 main parts, a compressor, an evaporator, a condensor and control valve for the evaporator, and then some other parts like control  board, a light controlled by the door switch, an circulation fan for the fridge, and 2 thermostats, one for fridge ( few degree above 0C), and one for freezer (could be low down to -20C), and some frigerators have automatic defroster system, basically it is heating coil inside the freezer controlled by a timer and a temperature switch.
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# y2 N6 o# D! b5 P: a$ A& Q" Q9 d1 HThe refrigerator turns on the compressor and an circulation fan to cool down the temperature in the fridge first when thermostat calls for cold. When the temperature goes down to certain degree, it will slowly cool down the freezer until the freezer reachs the setting point.

7 P! |* z5 V! q: tThe situation of your refrigerator looks like the air circulation system for the fridge is NOT working properly. That could be the thermostat or the circulation fan for the fridge, or could be the air duct for fridge is blocked, that may be caused by the too mcuh frost in the freezer due to the defroster is not working.
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8 {- Y2 W8 N9 E) P3 |6 K$ [( V% \: PSo check out the thermostat, circulation fan and defroster first.  The thermostat normally just a contact; circulation fan I believe it is 120V; defroster is just a resistance coil.
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' m5 Y( C4 k. J/ F) q. jIt will be better if you have electrical circuit diagram, sometimes the diagram could be found inside the control charmber located in the refrigerator.

; B' v; D/ o# c. z% f  XGood luck.

gmhwe

冰箱下面的冰冻部分完好，就是上面的制冷部分不制冷了，有人知道是什么原因吗？谢谢。
老孔雀 发表于 2010-5-4 04:19

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太不具体了.
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试测一下上面的"冷冻"部分的温度,

下面"冷却"部分的温度,
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thermostat设置的温度.

佃工

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我帮朋友弄过两次冰箱故障，现象都是压缩机在转，但风扇吹出来的风都是常温。楼主说的是不是同一现象？
; y, o# ]. W. t6 E7 I那两次都是因为装在蒸发器上面的除霜发热丝烧断了，整个蒸发器变成了一个冰坨子。换了发热丝就正常了。
另外是不是循环风扇坏掉了？我见过的冰箱是靠风扇把frozen那里的蒸发器的冷“吹”到储藏室的。
8 @: H3 P9 y6 O" g+ ^' U' G5 e风扇坏了。那边也就不冷了。
* j  v- x2 P' {. P. e/ G* ~1 v6 A9 x) P冰箱的背面都贴着接线图。楼主不妨对照着查一下。

老孔雀

谢谢各位的热心解答。
已经是第2天了，上面的温度跟室温基本上一样；下面新放进去的东西也冰冻的很结实。
5 \* X) K0 Z: j* r- L我的冰箱是amana的牌子的，冰冻部分在下面，上面是冷藏。不确定冷藏部分的"冷源“是从那里来的，就是发现最低端靠近冷冻的部分有两个小窗口，不确定是不是靠这两个小窗口把冷风从下面吹上来的？如果是的话，那估计就是上面的朋友说的，要么是通道堵塞了；要么是风扇坏掉了。上面的朋友能说的稍微详细一点如果清理通道吗？
冰箱实在太重，我一个人都”挪"不出来。如果有人能前来维修，请短信我联系方式以及收费情况。谢谢了。

MrElectrician

6# 老孔雀
" @& Z3 J7 S6 jI think you should better call a HVAC or appliance specialist to come over if you are not so sure how to check it by yourself as mentioned above.

The difficulty to fix the problem is to open some covers by right tools without damaging anything, not the electrical problem, that requires an experience appliance specialist who do every day, not the normal electrician like me....