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Control method, device and air conditioner for power-off protection of air conditioning system

A technology for power failure protection and air conditioning systems, applied in emergency protection circuit devices, heating and ventilation control systems, heating and ventilation safety systems, etc., can solve problems such as damage to compressors or other components, reduce failures, and increase production costs. , The effect of reducing electrical stress damage

Active Publication Date: 2021-06-18
NINGBO AUX ELECTRIC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problem in the prior art that the compressor or other components may be damaged when the power supply is suddenly cut off

Method used

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  • Control method, device and air conditioner for power-off protection of air conditioning system
  • Control method, device and air conditioner for power-off protection of air conditioning system
  • Control method, device and air conditioner for power-off protection of air conditioning system

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Embodiment Construction

[0043] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0044] The air conditioning system is mainly composed of compressors, condensers, evaporators, and four-way valves. The components are connected in sequence through pipelines to form a closed system. The refrigerant continuously carries out the Carnot cycle in the system, and exchanges heat with the surrounding environment through the conversion between the gas and liquid phases, thereby realizing the cooling and heating functions.

[0045] When the air conditioning system is running, the compressor changes the refrigerant from a low-pressure state to a high-pressure state, which creates conditions for the refrigerant to change from a gaseous state to a liquid state. At the same time, the continuous operation of the compressor makes the re...

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Abstract

The invention provides a control method and device for power-off protection of an air-conditioning system, and an air conditioner, relating to the technical field of air conditioners, including acquiring the current flowing through a power device connected between DC buses, the voltage of the DC buses and compressing The phase current when the machine is running; according to the current of the power device, the voltage of the DC bus and the phase current of the compressor, it is judged whether the predicted power failure condition is met; if the predicted power failure condition is met, then shut down load output. The invention monitors the operating state of the system in real time, and predicts whether the power supply is powered off according to the current of the power device, the voltage of the DC bus and the phase current of the compressor. And when the predicted power failure occurs, the load output will be turned off immediately, so that no large current will be generated, and the compressor will not be demagnetized. Moreover, it can effectively reduce the electrical stress damage of controller components and reduce the risk of component failure.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a control method and device for power failure protection of an air conditioning system and an air conditioner. Background technique [0002] With the improvement of living standards, air conditioners have entered thousands of households. More and more public places, such as shopping malls, supermarkets, and office buildings, are also equipped with air-conditioning systems to create a comfortable environment for users that is warm in winter and cool in summer. [0003] When the existing air conditioner is in operation, if the power supply suddenly cuts off, because there is an electrolytic capacitor in the system circuit to store electric energy, the weak current part of the driver board can still maintain power supply at the moment of power failure, so that the single-chip microcomputer can still work normally. However, the voltage of the strong power part has d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/32F24F11/64F24F11/70F24F11/88H02H7/09
CPCF24F11/32F24F11/64F24F11/70F24F11/88H02H7/09
Inventor 陈红李发顺许真鑫
Owner NINGBO AUX ELECTRIC
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