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空调制冷效果不佳如何检查制冷剂泄漏

来源:http://www.jnrunao.com/ 日期:2021-07-27 发布人:runao
空调系统已逐渐成为轿车的标准设备。现有汽车使用的空调器种类较多,其结构大同小异。维护间隔一般应为一年一次或视需进行。在使用中如发现其制冷效果不佳时,应进行检查,故障一般多为制冷剂泄漏所致。可以通过以下步骤进行检查修理。
Air conditioning system has gradually become the standard equipment of cars. There are many kinds of air conditioners used in existing cars, and their structures are similar. The maintenance interval shall generally be once a year or as required. If it is found that its refrigeration effect is poor in use, it shall be checked. Generally, the faults are mostly caused by refrigerant leakage. The following steps can be used for inspection and repair.
1.查找泄漏部位
1. Find the leakage position
目前车辆上使用的空调系统一般为单冷开启式,制冷剂多采用氟里昂(R12或氟里昂的替代产品134a)。在使用中,制冷剂易从各连接接头、油封处泄漏,制冷剂泄漏将会导致制冷效果差或不制冷等现象。
At present, the air conditioning system used in vehicles is generally single cold open type, and Freon is mostly used as refrigerant (R12 or the alternative product 134a of Freon). In use, the refrigerant is easy to leak from each connecting joint and oil seal. The refrigerant leakage will lead to poor refrigeration effect or no refrigeration.
(1)检查漏油痕迹。在空调制冷循环系统中,冷却油是用来润滑密封轴承以及压缩机内其他运动部件的,少量的润滑油将会与制冷剂一起进入制冷循环系统中。如果制冷循环系统发生泄漏,泄漏处就会出现油渍,所以在检查中,发现管路及接头处有油渍,就可以确定该处有泄漏故障,应进行修理。
(1) Check for signs of oil leakage. In the air conditioning refrigeration cycle system, the cooling oil is used to lubricate the seal bearing and other moving parts in the compressor, and a small amount of lubricating oil will enter the refrigeration cycle system together with the refrigerant. If the refrigeration cycle system leaks, oil stains will appear at the leakage place. Therefore, if oil stains are found at the pipeline and joints during inspection, it can be determined that there is a leakage fault and should be repaired.
(2)观察检视窗,判定制冷剂泄漏情况。起动发动机(约1000r/min),打开制冷控制开关(A/C),将温度开关控制杆置于COLD(冷)位置,风扇开关开到的位置,可以从检查窗处观察到制冷剂的流动状态,来判断制冷循环系统中有无泄漏,如图1所示。
(2) Observe the inspection window to determine the refrigerant leakage. Start the engine (about 1000r / min), turn on the refrigeration control switch (A / C), place the temperature switch control lever in the cold position, and turn the fan switch to the cold position. The flow state of refrigerant can be observed from the inspection window to judge whether there is leakage in the refrigeration cycle system, as shown in Figure 1.
制冷剂流动正常:制冷剂大体上透明,此时出风口的风是冷的。制冷系统的状态正常。
Normal refrigerant flow: the refrigerant is generally transparent. At this time, the air at the air outlet is cold. The state of the refrigeration system is normal.
制冷剂不足:制冷剂不足时,就会经常看到气泡流动,制冷剂呈乳白色,这时制冷效果不佳。
Insufficient refrigerant: when the refrigerant is insufficient, bubbles will often flow, and the refrigerant is milky white. At this time, the refrigeration effect is poor.
没有制冷剂:如果制冷系统严重泄漏,观察玻璃窗内就什么也看不到,此时空调系统不会制冷。富康轿车的储液罐上有A、B两个检视窗。检视窗A可以判断储液罐中干燥剂的水分含量是否饱和。若呈蓝色,表示正常;若呈红色,表示水分已呈饱和状态。应缓慢的排尽空调系统中的制冷剂,更换储液罐中的干燥剂,然后重新加注制冷剂。B检视窗的作用和前面介绍的内容相同,主要用于观察制冷剂的情况。
No refrigerant: if the refrigeration system leaks seriously, nothing can be seen in the observation glass window. At this time, the air conditioning system will not cool. There are two inspection windows a and B on the reservoir of Fukang car. The inspection window a can judge whether the moisture content of the desiccant in the liquid storage tank is saturated. If it is blue, it indicates normal; If it is red, it indicates that the water is saturated. Drain the refrigerant in the air conditioning system slowly, replace the desiccant in the reservoir, and then refill the refrigerant. The function of B inspection window is the same as that described above. It is mainly used to observe the condition of refrigerant.
在检查时,所有连接部位或冷凝器表面一旦发现油渍,一般都说明此处有制冷剂泄漏。发现有泄漏现象时,应及时进行排除泄漏故障,补充制冷剂和润滑油,以防泄漏润滑油,损坏空调系统。
During inspection, once oil stains are found on all connecting parts or condenser surface, it generally indicates that there is refrigerant leakage here. In case of leakage, the leakage fault shall be eliminated in time and the refrigerant and lubricating oil shall be supplemented to prevent the leakage of lubricating oil and damage to the air conditioning system.
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