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Voltage abnormity protection circuit, control method and air conditioner

A technology for protecting circuits and abnormal voltages, applied in emergency protection circuit devices, protection against overvoltage, protection against undervoltage or no voltage, etc., and can solve problems such as device failures

Pending Publication Date: 2021-05-18
TCL AIR CONDITIONER ZHONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a voltage abnormality protection circuit, control method and air conditioner, aiming to solve the technical problem of device failure caused by voltage abnormality in the air conditioner

Method used

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  • Voltage abnormity protection circuit, control method and air conditioner
  • Voltage abnormity protection circuit, control method and air conditioner
  • Voltage abnormity protection circuit, control method and air conditioner

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Embodiment Construction

[0043] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044] refer to figure 1 , figure 1 It is a structural schematic diagram of the air conditioner in the hardware operating environment involved in the solution of the embodiment of the present invention.

[0045] Such as figure 1 As shown, the air conditioner may include: a processor 1001 , such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002 , a user interface 1003 , a network interface 1004 , and a memory 1005 . Wherein, the communication bus 1002 is used to realize connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally in...

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PUM

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Abstract

The invention belongs to the technical field of variable frequency air conditioners, and discloses a voltage abnormity protection circuit, a control method and an air conditioner. The circuit comprises a voltage sampling circuit, a switch control module and a micro-control unit, wherein the switch control module comprises a plurality of switch controllers; the voltage sampling circuit is used for sampling the current voltage received by the load circuit and outputting a current voltage signal to the micro-control unit; and the micro-control unit is used for controlling a corresponding switch controller in the switch control module to disconnect a path between the load circuit and the voltage input end and triggering bus voltage protection when the current voltage value is in a preset voltage interval. The bus voltage protection is triggered when the current voltage value is in the preset voltage interval, overvoltage damage or low-voltage faults of devices in the circuit are avoided, false triggering of voltage protection is avoided, the product quality is improved, the after-sales fault risk is reduced, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of frequency conversion air conditioners, in particular to a voltage abnormality protection circuit, a control method and an air conditioner. Background technique [0002] At present, the commonly used circuit topology of inverter air conditioners is that the mains power passes through the EMI (Electromagnetic Interference, electromagnetic interference) filter circuit unit and then passes through the PFC (Power Factor Correction, power correction factor) circuit to boost the input 220V mains power to the required bus voltage VDC. The switching power supply circuit, the second driving module circuit of the compressor, and the power supply part of the second driving module circuit of the DC fan are all introduced from the bus bar of the PFC circuit, and the switching power supply circuit is the main chip MCU and its peripheral circuits and load circuits such as four-way valves , electronic expansion valve and ...

Claims

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Application Information

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IPC IPC(8): H02H3/20H02H3/24F24F11/88
CPCH02H3/207H02H3/24F24F11/88
Inventor 刘湘张琴兰胡作平徐经碧韩东
Owner TCL AIR CONDITIONER ZHONGSHAN CO LTD
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