Defrosting control method, controller, air conditioner, storage medium and terminal

Abstract

The invention belongs to the technical field of air conditioner control, and discloses a defrosting control method, a controller, an air conditioner, a storage medium and a terminal. The defrosting control method comprises the steps of extracting operation time, power and evaporator inner pipe temperature as judging parameters, and monitoring a change rate of operation power is monitored. The heating operation time t1 refers to the stable operation heating time of the air conditioner; the accumulated heating operation time t2 refers to accumulated operation heating time of the air conditioner;once detection of the operation power PN is conducted every interval time t after the operation time t1 or t2 passes; a power change rate and preset power rates A and B are calculated in real time; the evaporator inner pipe temperature T of an inner pipe is collected through an indoor pipe temperature sensing bulb; and an inner pipe temperature T1 is preset, and whether a defrosting condition isentered or not is judged. According to the defrosting control method, the controller, the air conditioner, the storage medium and the terminal, whether the fixed-frequency air conditioner needs to bedefrosted or not can be accurately recognized; under the low-temperature and low-humidity conditions, frost is defrosted if exists, and defrosting is not conducted if no frost exists; the unnecessarydefrosting frequency is reduced; and therefore, the user experience is improved, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioner control, and in particular relates to a defrosting control method, a controller, an air conditioner, a storage medium and a terminal. Background technique [0002] The low-temperature heating function of the heat pump air conditioner means that when the external environment is low, the air conditioner can perform heating work indoors to increase the indoor ambient temperature and ensure normal heating. When the fin surface temperature of the outdoor fin heat exchanger of the air source heat pump is lower than the air dew point temperature and less than 0°C, frost will form on the surface of the fin heat exchanger, which increases the thermal resistance between the air and the fins At the same time, the frost layer increases the air flow resistance, reduces the heat transfer capacity of the air-cooled fin heat exchanger, and leads to a decrease in the inner heating capacity, which requires ...

AI Technical Summary

Problems solved by technology

[0006] Through the above analysis, the existing problems and defects of the prior art are: for fixed-frequency air conditioners, there are few controllable parameters, and the existing time-temperature timing defrosting method is prone to false defrosting under low temperature and low humidity conditions. Changes in the temperature difference of the inner tube and the running time, the temperature difference of the inner tube is easily affected by the reheating of the evaporator pipeline and the fluctuation of the ambient temperature, resulting in mis-defrosting (defrosting without frost), or frequent defrosting (defrosting starts when the frost is very thin )

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