Air conditioner heat exchanger dirty clogging detection method, system and air conditioner based on fan power

Abstract

Disclosed are a method and system (200, 600) for detecting a dirt blockage of a heat exchanger of an air conditioner based on fan power, and an air conditioner (700, 800). The detection method comprises the following steps: acquiring the degree of dirt blockage of a dust filter screen at a first fan speed; acquiring a first fan power corresponding to the degree of dirt blockage of the dust filter screen at the first fan speed; acquiring a second fan power to which the overall degree of dirt blockage of an indoor unit corresponds at the first fan speed; generating a variation of the fan power; and acquiring the level of dirt blockage of the heat exchanger to which the variation of the fan power corresponds at the first fan speed. The detection method can simultaneously detect the respective dirt blockage conditions of the dust filter screen and the heat exchanger so as to control the air conditioner independently. Different control modes of the air conditioner can also be used according to different levels of dirt blockage of the heat exchanger.

Description

technical field [0001] The invention relates to the field of air conditioner control, in particular to a method and system for detecting dirty blockage of an air conditioner heat exchanger based on fan power, and an air conditioner. Background technique [0002] The heat exchanger is the core component of the air conditioner and plays a vital role in the cooling and heating system of the air conditioner. The structure of the heat exchanger is composed of pipes and densely distributed fins. The fins are inserted in series on the pipes and arranged densely. During operation, when the airflow passes through it, the dust and sundries in the air are easy to adhere to the fins and cause dirty blockage. The impact of a dirty heat exchanger is much more serious than that of a dust filter. It will not only reduce the air output of the air conditioner and affect the performance of the air conditioner, but also because the heat exchange between indoor and outdoor depends on the fins, ...

AI Technical Summary

Problems solved by technology

However, the dust filter and the heat exchanger are different in terms of dust accumulation rate, parasitic bacteria, and cleaning methods: the dust accumulation rate of the dust filter is fast, and the dust accumulation rate of the heat exchanger is relatively slow due to the protection of the dust filter; Parasitic dust mites and bacteria mixed in the air dust, in addition to these bacteria on the heat exchanger, more molds will grow due to its humid environment; the dust filter is easy to clean, manual cleaning or automatic brush cleaning is easy to achieve, It takes a short time and does not need to consume a lot of energy. However, due to its own structural reasons, the heat exchanger is very difficult to clean, and the required method takes a long time and consumes a lot of energy.

Images