Power failure detection method and system and air conditioner

Abstract

The invention provides a power failure detection method and system and an air conditioner. The power failure detection method includes the steps that according to a preset period, a standard reference value of the busbar voltage of the air conditioner is determined; the busbar voltage of the air conditioner is detected in real time; according to the standard reference value, a corresponding first detection section and the preset descent frequency and the preset ascent frequency of the first detection section are determined; when it is confirmed that the busbar voltage is within the first detection section, whether the continuous descent frequency of the busbar voltage is larger than or equal to the preset descent frequency or not and whether the ascent frequency of the busbar voltage is smaller than or equal to the preset ascent frequency or not are judged; when it is judged that the continuous descent frequency is larger than or equal to the preset descent frequency and the ascent frequency is smaller than or equal to the preset ascent frequency, it is confirmed that the power failure abnormality of the busbar voltage occurs and electric quantity data of the air conditioner are stored to a peripheral storage module. By the adoption of the technical scheme, the electric quantity data are accurately stored when the power of the air conditioner fails.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a power-off detection method, a power-off detection system and an air conditioner. Background technique [0002] In the related technology, when the air conditioner is used in the peak season of electricity consumption in summer or in the rural power grid, the air conditioner will lose power during use, and there will be cases where the user forgets to turn off the air conditioner before going out, directly turns off the main switch of the power supply, and directly unplugs the air conditioner. Air conditioner plugs and other conditions, although the above conditions will not affect the normal use of the air conditioner, they will have a great impact on the user habit settings and important operating data stored inside the air conditioner. Previously, the power data was not saved in EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Read-O...

AI Technical Summary

Problems solved by technology

[0002] In the related technology, when the air conditioner is used in the peak season of electricity consumption in summer or in the rural power grid, the air conditioner will lose power during use, and there will be cases where the user forgets to turn off the air conditioner before going out, directly turns off the main switch of the power supply, and directly unplugs the air conditioner. Air conditioner plugs and other conditions, although the above conditions will not affect the normal use of the air conditioner, they will have a great impact on the user habit settings and important operating data stored inside the air conditioner. Previously, the power data was not saved in EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Read-Only Memory), so when the air conditioner is turned on next time, the displayed power data will deviate, resulting in inaccurate power detection

[0003] The usual way to solve the above problems is to regularly record the user settings and power data into the EEPROM. This method is feasible for saving the data of user settings such as temperature, mode, and angle of the air guide strip, but it cannot be realized. Save the real-time changing power data, that is, it is impossible to ensure that the real-time changing data will not be lost when the air conditioner is powered off

Even if the method of shortening the timing cycle and saving the power data very frequently is adopted, on the one hand, the deviation is only reduced, and on the other hand, frequent writing to the EEPROM will also shorten the service life of the EEPROM

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