Fault-tolerant control method of air conditioner and air conditioner

Abstract

The invention provides a fault-tolerant control method of an air conditioner and the air conditioner. The method comprises the following steps: sampling alternating-current voltage and direct-currentvoltage, obtaining an alternating-current voltage sampling value and a direct-current voltage sampling value, judging whether the direct-current voltage sampling value meets a first preset condition or not, and if the direct-current voltage sampling value meets the first preset condition, operating according to an average current PFC control algorithm, otherwise, operating according to an adaptivePFC control algorithm. The invention further provides the air conditioner, the air conditioner comprises the controller storing the fault-tolerant program, and the fault-tolerant control method of the air conditioner according to any one of the claims 18 can be achieved. According to the invention, the redundancy design of the algorithm is utilized, and the self-adaptive PFC control algorithm isused as an alternative scheme of the average current PFC control algorithm, so that the air conditioner can still normally operate under the condition of a direct-current voltage sampling fault, the hardware of the air conditioner is protected from being damaged, and meanwhile, the normal refrigerating and heating functions of the air conditioner are not influenced, so that experience of the useris guaranteed.

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.

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