Automatic detection and regulation method and circuit for air conditioner

Abstract

The invention provides an automatic detection and regulation method and an automatic detection and regulation circuit for an air conditioner. The circuit comprises a singlechip control circuit, a phase-sequence detection circuit, a relay driving circuit, a display circuit, a power supply circuit, a compressor overcurrent protection circuit, a relay contact adhesion detection circuit and a startupdetection circuit. When the technical scheme is adopted, the power supply circuit provides a working voltage for the phase-sequence detection circuit, the display circuit, the singlechip control circuit and the relay contact adhesion detection circuit; the signals of the phase-sequence detection circuit, the relay driving circuit, the compressor overcurrent protection circuit, the relay contact adhesion detection circuit and the startup detection circuit are sampled and input into the singlechip control circuit; after the signals are processed by the singlechip control circuit, control instructions are output to a corresponding circuit to be executed; and the display circuit displays a phase-sequence output state and codes of various faults such as open phase, relay contact adhesion, relay operation failure, overcurrent and the like and gives a buzzing alarm, so that equipment faults caused by reversed phase, open phase or voltage unbalance are avoided.

Description

Technical field: [0001] The invention relates to the technical field of circuits, in particular to an automatic detection and adjustment method and circuit for an air conditioner. Background technique: [0002] The current air conditioner has certain requirements on the phase sequence of the three-phase AC power supply during operation, that is, only one direction of operation is allowed, and the reverse operation may cause equipment damage. However, the phase sequence of three-phase AC is usually unknown. Even if the equipment has been operated according to the normal phase sequence, the phase sequence may be incorrect during maintenance, power line construction or air conditioner replacement, resulting in equipment damage. ; The failure phenomenon of damage caused by the overcurrent of the compressor is also more common; in addition, the contact adhesion of the commutation contactor will also cause a short circuit accident of the three-phase power supply. Therefore, devel...

AI Technical Summary

Problems solved by technology

[0002] The current air conditioner has certain requirements on the phase sequence of the three-phase AC power supply during operation, that is, only one direction of operation is allowed, and the reverse operation may cause equipment damage

However, the phase sequence of three-phase AC is usually unknown. Even if the equipment has been operated according to the normal phase sequence, the phase sequence may be incorrect during maintenance, power line construction or air conditioner replacement, resulting in equipment damage. ; The fault phenomenon of damage caused by the overcurrent of the compressor is also common; in addition, the contact adhesion of the reversing contactor will also cause a short circuit accident of the three-phase power supply

Images