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Inverter air conditioner and voltage shock protection method and device for inverter air conditioner

A frequency conversion air conditioner, voltage shock technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as electronic component rectifier diodes, electrolytic capacitor damage, voltage rise, large capacitor charging current, etc., to improve reliability and prevent Capacitor charging current is too large to ensure normal and stable operation

Active Publication Date: 2017-06-27
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] However, due to the fluctuation of the grid voltage, the voltage at the AC input terminal of the inverter air conditioner will rise sharply instantaneously, which will generate a large capacitor charging current. If the capacitor charging current is too large, it will easily cause the electronic components in the inverter air conditioner, such as relays, rectifiers, etc. Damage to diodes, electrolytic capacitors, etc.

Method used

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  • Inverter air conditioner and voltage shock protection method and device for inverter air conditioner
  • Inverter air conditioner and voltage shock protection method and device for inverter air conditioner
  • Inverter air conditioner and voltage shock protection method and device for inverter air conditioner

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indic...

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Abstract

The invention discloses a voltage shock protection method for an inverter air conditioner, which comprises the following steps: detecting the DC voltage at the output terminal of the rectifier and the DC current supplied to the IPM module; obtaining the rectification coefficient of the rectifier according to the DC current; and obtaining the rectification coefficient according to the DC voltage and the rectification coefficient Acquiring the current AC voltage of the AC power, and judging that the current AC voltage is less than or equal to the first preset voltage, controlling the controllable switch to be disconnected so that the protection device is connected in series between one end of the AC power and the first input end of the rectifier, and controlling the compressor is down. The anti-voltage shock protection method can control the compressor to shut down when the voltage of the input alternating current is too low, avoiding the excessive charging current of the capacitor caused by the instantaneous and sharp rise of the alternating current voltage, which will cause the electronic components in the inverter air conditioner to be damaged by the large current . The invention also discloses an anti-voltage impact protection device of an inverter air conditioner and an inverter air conditioner.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a voltage shock protection method for an inverter air conditioner, a voltage shock protection device for an inverter air conditioner, and an inverter air conditioner. Background technique [0002] At present, the inverter air conditioner converts AC mains power into DC power through a rectification and filtering circuit to supply the IPM module, and then the IPM module outputs AC power of the required frequency to supply loads such as compressors. [0003] However, due to the fluctuation of the grid voltage, the voltage of the AC input terminal of the inverter air conditioner will rise sharply instantaneously, which will generate a large capacitor charging current. If the capacitor charging current is too large, it will easily cause the electronic components in the inverter air conditioner, such as relays, rectifiers, etc. Damage to diodes, electrolytic capacitors, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/12
Inventor 李洪涛陈建昌
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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