为什么我家的空调不能制热，但是可以制冷（空调外贸写作素材）
现在进入冬天，很多家庭都喜欢用空调取暖。因此空调制热就很重要。但是突然家里的空调只制冷不制热了，真的很伤心。有一下几种可能供大参考。
1.室外温度过低，室外温度过低会使空调无法正常工作。室外温度过低，会使空调无法化霜，不能制热。变频空调在零下15度左右，就无法正常制热了。
2. 空调制热的时候刚启动开机会有一段的缓冲时间，内风机不会马上就开启，这是为了防止冷风的吹出。因为制热时现需要给四通阀上电,使其换向。这个时间大概在3-5分钟左右。
3. 当室外温度过低的时候,室外盘管容易结霜，一段时间后就会进行除霜，此时也不会制暖。以上都是正常现象，如果开机时间太长都不制热，就可能真的空调本身出问题了。
那么我们想自己动手处理一下，该怎么做呢？针对几种可能性，我们可以这样做：
1. 过滤网积尘多
空调由于多月没有使用，过滤网上吸附的积尘堵塞了出风口，造成空调出风量小，因此感觉空调制热效果差。
处理办法：开启空调前，先清洗滤网，清除上面的积尘。
2.氟利昂减少
空调若使用年限长、使用频繁，会使氟利昂减少，制热的循环功能就会大大降低。
处理办法：找专业人士加氟利昂。
3.止逆阀和四通阀出故障
如果用来切换制冷剂循环的止逆阀若发生故障，会使制冷系统的阻力减小，冷凝器无法获取热量，就会出现空调制热不足。四通阀串气同样也会使制热功能降低。
处理办法：更换止逆阀或者四通阀即可。
好了，如果以上几种方法自己都试过了还是不行，那你只有找专业空调修理师傅来看看了，希望每个人都能过一个舒适的冬天....
英文版：
Why can my air conditioner make heat, but it can cool(air conditioning foreign trade writing material)
Now go into the winter, many families like to use air conditioning heating. So its very important to make heat by air conditioning. But all of a sudden, the air conditioner at home just doesn work. Its really sad. There are several possibilities for your reference.
1. If the outdoor temperature is too low, the air conditioner will not work normally. Because the outdoor temperature is too low, it will make the air conditioner unable to defrost and heat. frequency conversion air conditioner can make normal heating at about 15 degrees below zero.
2. When the air conditioner heats up, there will be a buffer time just after the machine is turned on. The internal fan will not turn on immediately, which is to prevent the cold air from blowing out. Because it is necessary to power on the four-way valve to make it change direction. This time is about 3-5 minutes.
3. When the outdoor temperature is too low, the outdoor coil is prone to frost. After a period of time, the defrosting will be performed, and the heating will not be performed at this time. The above is a normal phenomenon. If the heating is not performed for too long, the air conditioner may be a problem.
So if we want to deal with it by ourselve, what should we do? For several possibilities, we can do in these way:
1. The filter screen is dusty
As the air conditioner has not been used for many months, the dust accumulated on the filter block the air outlet, resulting in a small amount of air output from the air conditioner, so it feels that the heating effect of the air conditioner is poor.
Treatment: before opening the air conditioner, clean the filter screen and remove the dust on it.
2. Freon reduction
If the air conditioner is used for a long time and frequently, it will reduce Freon and the circulation function of heating will be greatly reduced.
Solution: find a professional to add Freon.
3. Check valve and four-way valve fail
If the check valve used to switch the refrigerant cycle fails, the resistance of the refrigeration system will be reduced, and the condenser will not get heat, and the air conditioning heating will be insufficient. The cross flow of four-way valve will also reduce the heating function.
Solution: replace check valve or four-way valve.
Finally, if the above methods have been tried by yourself and still not work, then you can only look for a professional air conditioning repairman to have a look. I hope everyone can have a comfortable winter ...
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