温度传感器故障率很高,日常维修中由于温度传感器的阻值随温度变化而变化,所以是否损坏在没有传感器温度与阻值对照表时,很难判断。下面以海尔冰箱使用的温度传感器为例作一说明和维修对照。 1.传感器从参数分有两种:冷冻和冷藏参数; 2.从形状分也有两种:圆形和方形; 3.冷藏蒸发器上的传感器、冷藏空间的传感器、0℃室的传感器和环境传感器的参数一样,都是冷藏传感器的参数;4.-7℃室、冷冻室和化霜传感器的参数一样,都是冷冻传感器的参数。在维修时,如果遇到传感器不正常时,可按照表3进行查询,用适当的电阻进行暂时替换,看故障是否排除,以此判断传感器是否损坏。 在0℃和-20℃时传感器的电阻值应符合表1所列阻值(如异常,则说明传感器损坏),传感器的B值应符合表2要求,传感器冷藏参数见表3,冷冻参数见表4。 表1 感器型号 | 特征温度 | 标称阻值(kΩ) | 阻值下限(kΩ) | 阻值上限(kΩ) | HAFR02,HAFR02A | 0℃ | 6.35 | 6 2230 | 6.4770 | HAFD02,HAFD02A | -20℃ | 18.9 | 18.522 | 19.278 | 表2 传感器型号 | B值(K) | 允许误差 | HAFR02 HAFR02A | B0/25≈3830 | +/-2% | HAFD02 HAFD02A | B-20/25=3770 | 表3 温度值 | 阻值min(kΩ) | 阻值nom(kΩ) | 阻值max(kΩ) | -30 | 31.36 | 33.07 | 34.86 | -29 | 29.58 | 31.16 | 32.81 | -28 | 27.91 | 29.37 | 30.89 | -27 | 26.35 | 26.69 | 29.09 | -26 | 24.88 | 26.12 | 27.4 | -25 | 23.5 | 24.64 | 25.82 | -24 | 22.2 | 23.25 | 24.34 | -23 | 20.99 | 21.95 | 22.95 | -22 | 19.84 | 20.73 | 21.65 | -21 | 18.76 | 19.58 | 20.43 | -20 | 17.75 | 18.5 | 19.28 | -19 | 16.79 | 17.49 | 18.2 | -18 | 15.9 | 16.54 | 17.19 | -17 | 15.05 | 15.64 | 16.24 | -16 | 14.26 | 1480 | 15.35 | -15 | 13.51 | 14 | 14.51 | -14 | 12.8 | 13.25 | 13.72 | -13 | 12.13 | 12.55 | 12.98 | -12 | 11.51 | 11.89 | 12.28 | -11 | 10.91 | 11.27 | 11.62 | -10 | 10.36 | 0.68 | 11 | -9 | 9.828 | 0.12 | 10.42 | -8 | 9.331 | 9.6 | 9.874 | -7 | 8.861 | 9.108 | 9.357 | -6 | 8.418 | 8.643 | 8.87 | -5 | 7.999 | 8.204 | 8.411 | -4 | 7.603 | 7.79 | 7.978 | -3 | 7.228 | 7.398 | 7.569 | -2 | 6.874 | 7029 | 7.184 | -1 | 6.54 | 6.68 | 6.82 | 0 | 6.223 | 6.35 | 6.477 | 1 | 5.911 | 6.038 | 6.165 | 2 | 5.617 | 5.743 | 5.87 | 3 | 5.339 | 5.464 | 5.59 | 4 | 5.076 | 5201 | 5.326 | 5 | 4.828 | 4.95 | 5.075 | 6 | 4.593 | 4.714 | 4.837 | 7 | 4.37 | 4.491 | 4.6074 | 8 | 4.16 | 4.279 | 4.399 | 9 | 3.961 | 4.078 | 4.196 | 10 | 3.772 | 3887 | 4.004 | 11 | 3.594 | 3.707 | 3.622 | 12 | 3.425 | 3.536 | 3.649 | 13 | 3.264 | 3073 | 3.485 | 14 | 3.112 | 3.219 | 3.329 | 15 | 2.968 | 3.073 | 3.181 | 16 | 2.832 | 2.935 | 3.04 | 17 | 2.702 | 2.803 | 2.906 | 18 | 2.579 | 2.678 | 2.779 | 19 | 2.463 | 2.559 | 2.658 | 20 | 2.352 | 2.446 | 2.543 | 21 | 2.247 | 2.339 | 2.434 | 22 | 2.147 | 2.237 | 2.33 | 23 | 2.052 | 2.14 | 2.231 | 24 | 1.962 | 2.047 | 2.136 | 25 | 1.876 | 1.96 | 2.046 | 26 | 1.794 | 1.876 | 1.961 | 27 | 1.717 | 1.796 | 1.879 | 28 | 1.643 | 1.721 | 1.802 | 29 | 1573 | 1.649 | 1.727 | 30 | 1.506 | 1580 | 1.657 | 31 | 1.442 | 1.514 | 1.59 | 32 | 1.381 | 1.452 | 1.525 | 33 | 1.324 | 1.392 | 1.464 | 34 | 1.269 | 1.336 | 1.405 | 35 | 1.216 | 1281 | 1.35 | 36 | 1.166 | 1.23 | 1.296 | 37 | 0.119 | 1.081 | 1.245 | 38 | 1.073 | 1.134 | 1.197 | 39 | 1.03 | 1.089 | 1.15 | 40 | 0.988 | 1.046 | 1.106 | 41 | 0.949 | 1.005 | 1.063 | 42 | 0.911 | 0.966 | 1.023 | 43 | 0.875 | 0.928 | 0.984 | 44 | 0.841 | 0.892 | 0.947 | 45 | 0.808 | 0.858 | 0.911 | 46 | 0.777 | 0.826 | 0.877 | 47 | 0.747 | 0.794 | 0.845 | 48 | 0.718 | 0.764 | 0.813 | 49 | 0.691 | 0.736 | 0.783 | 50 | 0.664 | 0.708 | 0.755 | 51 | 0.639 | 0.682 | 0.727 | 52 | 0.615 | 657 | 1.701 | 53 | 0.592 | 0.633 | 0.676 | 54 | 0.57 | 0.61 | 0.652 | 55 | 0.549 | 588 | 0.629 | 56 | 0.529 | 0.567 | 0.606 | 57 | 0.51 | 0.546 | 0.585 | 58 | 0.491 | 0.527 | 0.565 | 59 | 0.473 | 0.508 | ].545 | 60 | 0.456 | 0.49 | 0.526 | 61 | 0.44 | 0.473 | 0.508 | 62 | 0.424 | 0.457 | 0.491 | 63 | 0.409 | 0.441 | 0.474 | 64 | 0.395 | 0.426 | 0.458 | 65 | 0.381 | 0.411 | 0.443 | 66 | O.368 | 0.397 | 0.428 | 67 | 0.355 | 0.384 | 0.414 | 68 | 0.343 | 0.371 | 0.4 | 69 | 0.331 | 0.358 | 0.387 | 70 | 0.32 | 0.346 | 0.374 | 71 | 0.309 | 0.335 | 362 | 72 | 0.299 | 0.324 | 350 | 73 | 0.289 | 0.313 | 0.339 | 74 | 0.279 | 0.303 | 0.328 | 75 | 0.2686 | 0.2977 | 0.33 | 76 | 0.261 | 0.284 | 0.308 | 77 | 0.253 | 0.275 | 0.298 | 78 | 0.244 | 0.266 | 0.289 | 79 | 0.237 | 0.257 | 0.28 | 80 | 0,229 | 0.249 | 0.271 | 81 | 0.222 | 0.241 | 0.263 | 82 | 0.215 | 0.234 | 0.255 | 83 | 0.208 | 0.227 | 0.247 | 84 | 0.201 | 0.22 | 0.24 | 85 | 0.195 | 0.213 | 1.232 | 86 | O.189 | 0.206 | 0.225 | 87 | 0.183 | 0.2 | 0.219 | 88 | 0.177 | 0.194 | 0.212 | 89 | 0.172 | 0.188 | 0.206 | 90 | 0.167 | 0.183 | 0.2 | 91 | 0.162 | 0.177 | 0.194 | 92 | 0.157 | 172 | 0.88 | 93 | 0.152 | 167 | 0.183 | 94 | 0.147 | 0.162 | 0.178 | 95 | 0.143 | 0.157 | 0.173 | 96 | 0.139 | 0.153 | 0.168 | 97 | 0.135 | 0.148 | 0.163 | 98 | 0.131 | 0.144 | 0.158 | 99 | 0.127 | 0.14 | 0.154 | 100 | 0.123 | 0.136 | 0.15 |
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