Air conditioner fault-tolerant control method and air conditioner

Abstract

The present invention proposes a fault-tolerant control method for an air conditioner and an air conditioner, the method comprising: sampling an AC voltage and a DC voltage, obtaining a sampled value of the AC voltage and a sampled value of the DC voltage, and judging whether the sampled value of the DC voltage satisfies a first preset conditions, if the DC voltage sampling value satisfies the first preset condition, it operates according to the average current PFC control algorithm; otherwise, it operates according to the adaptive PFC control algorithm. The present invention also proposes an air conditioner, including a controller storing a fault-tolerant program, which can realize the fault-tolerant control method of the air conditioner according to any one of claims 1-8. The present invention utilizes the redundant design of the algorithm, and uses the self-adaptive PFC control algorithm as an alternative to the average current PFC control algorithm, so that the air conditioner can still operate normally in the case of a DC voltage sampling failure, which not only protects the air conditioner hardware from damage, and at the same time ensure that the normal cooling and heating functions of the air conditioner are not affected, ensuring the user experience.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner fault-tolerant control method and an air conditioner. Background technique [0002] The air conditioner is a kind of household appliance. The controller of the outdoor unit of the existing air conditioner takes into account the cost in actual application. The DC voltage sampling is usually directly obtained by high voltage division, so that there is a deviation between the DC voltage sampling value and the actual value, and There is no isolation between DC voltage sampling and strong current, and there is no operational amplifier. Therefore, compared with other analog sampling, DC voltage sampling is more prone to failure. However, the existing solutions have no fault judgment after DC voltage sampling fails. Usually The occurrence of this fault will directly lead to the shutdown of the whole machine, easily cause damage to the controller h...

AI Technical Summary

Problems solved by technology

[0002] The air conditioner is a kind of household appliance. The controller of the outdoor unit of the existing air conditioner takes into account the cost in actual application. The DC voltage sampling is usually directly obtained by high voltage division, so that there is a deviation between the DC voltage sampling value and the actual value, and There is no isolation between DC voltage sampling and strong current, and there is no operational amplifier. Therefore, compared with other analog sampling, DC voltage sampling is more prone to failure. However, the existing solutions have no fault judgment after DC voltage sampling fails. Usually The occurrence of this fault will directly lead to the shutdown of the whole machine, which will easily cause damage to the controller hardware, and make it difficult to locate the fault, causing great difficulties for after-sales maintenance.

Images