Shutdown method of variable frequency air conditioner and variable frequency air conditioner

Abstract

The invention discloses a shutdown method of a variable frequency air conditioner. An indoor machine or an outdoor machine sends out a shutdown signal, and the outdoor machine receives the shutdown signal and analyzes a shutdown reason. When the shutdown reason is an emergency shutdown situation in an accidental shutdown, immediate shutdown processing is carried out.When the shutdown reason is a non-urgent shutdown situation in the accidental shutdown, underclocking shutdown processing is carried out. When the shutdown reason is a normal shutdown, the underlocking shutdown processing is carried out. By distinguishing the shutdown reasons of a variable frequency air conditioner and adopting different shutdown modes to different shutdown reasons, emergence of situations of high-frequency shutdown of the variable frequency air conditioner is greatly reduced, service life of the variable frequency air conditioner is further improved, immediate shutdown is conducted when urgent shutdown is needed, and using safety is improved. The invention further discloses a variable frequency air conditioner, a shutdown reason analyzing module is added in the air conditioning system to analyze the shutdown reason, and adopts different shutdown modes according to different shutdown reasons, the high-frequency shutdown is reduced, and service life of the air conditioner is improved.

Description

Technical field [0001] The invention relates to the technical field of frequency conversion air conditioners, in particular to a shutdown method of frequency conversion air conditioners. Background technique [0002] Such as figure 1 As shown, the control principle of the control system of the existing inverter air conditioner is as follows: the air conditioning system is composed of an indoor unit and an outdoor unit. The indoor unit is calculated by the indoor main control unit through its sensors, and the indoor capacity requirements are calculated. Its capacity requirements are sent to the outdoor main control unit. The outdoor main control unit calculates the frequency at which the inverter compressor needs to operate according to the capacity requirements of the indoor unit and the specific conditions of the outdoor unit, and sends the frequency at which the inverter compressor needs to operate to the compressor Drive unit, the compressor drive unit controls the operation o...

AI Technical Summary

Problems solved by technology

This impact will reduce the service life of the smoothing capacitor and accelerate the damage of the smoothing capacitor

[0006] 2. The compressor vibrates severely, wears heavily and has a short service life

Although this control method can reduce the damage to the compressor caused by high-frequency direct shutdown to a certain extent, it has the following disadvantages: After the outdoor unit receives the shutdown signal, no matter what causes the shutdown, it will be shut down by reducing the frequency. Emergency shutdown is required, but immediate shutdown cannot be achieved, posing potential safety hazards

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