Fan linkage defrosting method of air conditioner

Abstract

The invention discloses a fan linkage type defrosting method for an air conditioner. The method comprises steps as follows: when the air conditioner operates, an actual current value I of an outdoor fan (1) is detected, a function of current variables and time variables is proposed and shown as follows: delta I / delta t=Kn, a Kn value is monitored all the time, and once Kn is larger than or equal to a defrosting alarm value N, a unit enters a defrosting mode. With the adoption of the defrosting method, whether the unit is about to enter the defrosting mode can be accurately determined.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to a fan-linked defrosting method for an air conditioner. Background technique [0002] When the air conditioning system is in heating operation, the fan drives the air to exchange heat with the coil. After the air is absorbed by the coil, it is easy to form a frost layer and cover the coil. In order to ensure heat exchange efficiency, defrosting treatment must be carried out. The conventional defrosting method is to reverse the direction of the four-way reversing valve, turn off the indoor fan, enter the defrosting mode, and use the compressor to directly transport the high-temperature and high-pressure refrigerant to the outdoor heat exchanger to melt the frost layer. [0003] The defrosting method in the prior art has the following disadvantages. First of all, the existing technology generally judges whether frost has formed based on factors such as coil temperature, compressor ...

AI Technical Summary

Problems solved by technology

First of all, the existing technology generally judges whether frost has formed based on factors such as coil temperature, compressor discharge pressure, and running time. The defrosting is judged after a certain thickness has a great negative impact on the heat exchange effect, that is, the defrosting cannot be judged in time; and it is precisely because the defrosting cannot be judged in time that the frost layer tends to become more and more serious in the later stage of the heating cycle. thick, it even makes it difficult to completely defrost, and the heat transfer efficiency is naturally not very high; moreover, the existing technology does not have an accurate setting for the defrosting time, and a defrosting time is often estimated by experience. Time, this presents a dilemma. If the defrosting time is too long, the room cannot be heated for a long time, which will reduce the user experience. If the defrosting time is too short, it will cause the defrosting to be dirty.

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