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Air conditioner overvoltage detection circuit, air conditioner electric control device and air conditioner

An overvoltage detection and electronic control device technology, applied in circuit devices, emergency protection circuit devices, measurement devices, etc., can solve problems such as high cost and large loss

Inactive Publication Date: 2019-08-23
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide an air conditioner overvoltage detection circuit, which aims to solve the problem of high cost of using a dedicated chip to detect the input voltage, and the problem of using a voltage dividing resistor and a large loss in the detection chip method

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  • Air conditioner overvoltage detection circuit, air conditioner electric control device and air conditioner
  • Air conditioner overvoltage detection circuit, air conditioner electric control device and air conditioner
  • Air conditioner overvoltage detection circuit, air conditioner electric control device and air conditioner

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. It should be noted that the descriptions involving "first", "second" and so on in the present invention are only for the purpose of description, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

[0034] The present invention proposes an air conditioner overvoltage detection circuit 10 .

[0035] Such as figure 1 as shown, figure 1 It is a module schematic diagram of an embodiment of an air conditioner overvoltage detection circuit...

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Abstract

The invention discloses an air conditioner overvoltage detection circuit, an air conditioner electric control device and an air conditioner. The air conditioner overvoltage detection circuit includesa first AC input end, a second AC input end, a rectifier circuit, a resistor voltage divider circuit, a voltage reference chip and an optocoupler feedback circuit. When an AC voltage is an overvoltage, a reference pole voltage of the voltage reference chip is greater than internal reference voltage, the voltage reference chip is turned on, the optocoupler feedback circuit is controlled for outputting an overvoltage feedback signal to a processor of the air conditioner or a controller in a power circuit of the air conditioner, in turn, the power input is correspondingly cut off to achieve overvoltage protection. The air conditioner overvoltage detection circuit is advantaged in that voltage detection is implemented by using a preset reference voltage inside the voltage reference chip, a current value flowing through the resistor divider circuit is small, the power consumed by the resistor voltage divider circuit is milliwatts, and thereby loss and cost are reduced.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner overvoltage detection circuit, an air conditioner electric control device and an air conditioner. Background technique [0002] At present, the overvoltage detection circuit for the input AC voltage in the air conditioner basically uses a dedicated overvoltage detection chip. The dedicated overvoltage detection chip is expensive, or the sampling resistor with a large loss is used to divide the voltage and sample and output the overvoltage signal. To the form of the detection chip, but the current flowing through the sampling resistor is too large, resulting in a large power loss in the sampling resistor. It is costly to use a dedicated overvoltage detection chip to detect the input voltage, and there is a large loss in the method of using a voltage dividing resistor and a detection chip. Contents of the invention [0003] The main purpose of the pre...

Claims

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Application Information

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IPC IPC(8): H02H1/00H02H3/20H02H7/12G01R19/165
CPCG01R19/16523H02H1/0007H02H3/20H02H7/1213
Inventor 霍兆镜
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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