Apparatus and method for detecting phase state

Abstract

This phase condition detector is constituted of a phase detecting part for detecting the first, second and third phases of the three-phase alternating current power source, an interruption detecting part for detecting a tailing edge of a pulse signal corresponding to the third phase and for recognizing the generation of interruption by the third phase to generate a count signal, a counter part for counting the pulse signals corresponding to the first and second phases using the third phase as a reference, a reverse phase / open phase detecting part for detecting a 'normal connection' condition or 'antiphase' condition and for detecting an 'open phase' condition based on the counted frequency of the interruption hereinbefore, and a display part for displaying an message for showing the each condition of the 'antiphase' condition, the 'open phase' condition or the 'normal connection' condition.

Description

technical field [0001] The present invention relates to an air conditioner, and in particular to an apparatus and method for detecting the phase state of an alternating current supplied to a multi air conditioner. Background technique [0002] Typically, a multi-body air conditioner includes an outdoor unit and multiple indoor units. [0003] figure 1 is a block diagram schematically showing the construction of a conventional air conditioner. [0004] Such as figure 1 As shown, the air conditioner includes: a compressor 6, which is used to inhale and compress the low-temperature-low-pressure refrigerant vapor released by the indoor heat exchanger 8, so as to convert it into high-temperature-high-pressure steam; The high-temperature-high-pressure steam released by the machine 6 is converted into a high-pressure saturated solution; the indoor heat exchanger 8 is used for converting the high-pressure saturated solution released by the outdoor heat exchanger 3 into a low-temp...

AI Technical Summary

Problems solved by technology

[0013] However, in the conventional technology, after the air conditioner is installed in a proper place, in order to operate the air conditioner, when the three-phase AC power is to be supplied to the air conditioner, by abnormally connecting the three-phase AC power supply with the power terminal of the air conditioner, the air conditioner The compressor 6 of the device will work abnormally

More specifically, the installer cannot correctly distinguish the R-phase terminal, the S-phase terminal, and the T-phase terminal of the three-phase AC power supply terminal, and may abnormally connect the three-phase AC power terminal to the terminal of the air conditioner, Thereby antiphase (antiphase or opposite phase) or open phase (open-phase)

[0014] In addition, by abnormally connecting the terminals of the three-phase AC and the terminals of the air conditioner, when the phase is reversed or opened, the control device of the air conditioner will be damaged, so that it cannot work

[0015] As mentioned above, in the conventional technology, the installer cannot correctly distinguish the R-phase terminal, the S-phase terminal and the T-phase terminal of the three-phase AC power terminal

[0016] In addition, in the conventional technology, when the installer supplies three-phase AC power to the air conditioner by abnormally connecting the three-phase AC power supply to the power terminal of the air conditioner, the compressor of the air conditioner operates abnormally.

[0017] In addition, in the conventional technology, when the installer abnormally connects the three-phase AC power supply to the power terminal of the air conditioner, phase reversal or open phase occurs, which will damage the control device of the air conditioner, so that it cannot work

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