What are the common antifreeze measures for units?

If the set temperature of the water tank is 45℃ or 55℃, when the temperature of the water tank reaches this temperature value, the host will stop working. If the end is not working, the pipe temperature will drop at this time. When the temperature is too low, for example, 3℃, At this time, the host control panel can automatically start the circulating water pump according to the set temperature value (3°C) to ensure that the pipeline will not freeze due to low temperature.

However, this method has a shortcoming. When the position of the temperature probe is not good, the accuracy will be problematic. There is also an electronic product such as the temperature probe, which sometimes fails. The measured temperature and If the actual temperature is different, a misjudgment will occur at this time. In addition, this method will not work when the power is off.

Another is to use antifreeze. In northern rural areas, there are sometimes power outages, or the entire family goes on vacation. Although there are instructions on the host and there are hints in the manual, users may not care too much, or may not remember it after a year and a half. Generally, before winter comes, Shanghai Central Air-Conditioning Engineering Co., Ltd. feels that agents should remind customers to pay attention to anti-freezing, but sometimes customers will not pay attention. Therefore, sometimes we will recommend customers to use antifreeze.

Air conditioning maintenance tells you that antifreeze also has its shortcomings: first, its specific heat capacity is lower than that of water, less heat under the same volume, the wind blown by the fan should be smaller or the temperature of the floor heating should be lower, and the antifreeze will dissipate heat. It should also be faster, and it may also have a certain impact on the heating effect.

This is not too obvious in actual operation, and the impact is not great. Another disadvantage is the cost. The more expensive one may cost 6-8 yuan/kg, and the cheaper one costs two or three yuan. Calculated on an area of 150 square meters, add a 100-150L buffer water tank, and add the flow rate in the floor heating pipe, it is about 200 kg, and it costs 5 yuan/kg to 1,000 yuan. Some customers may be reluctant .

The other is to use the electric heating cable, which used to do solar energy in the north. When the ambient temperature is relatively low or the machine stops working, the electric heating cable is activated, and the power is automatically cut off when the pipe temperature reaches a certain value. Of course, this method also has the limitation that it cannot be used after a power outage.