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Protection circuit for air conditioning controller, and control method for protection circuit

An air conditioner controller and protection circuit technology, which is applied in the direction of emergency protection circuit devices, protection against overcurrent, protection against overvoltage, etc., can solve the problem of damage to loads or circuit boards, and air conditioner damage to loads or circuits Board and other problems, to achieve the effect of prolonging the service life, good protection effect, and reducing the overvoltage environment

Inactive Publication Date: 2018-02-09
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the power supply is undervoltage instantaneously, because the load of the air conditioner remains unchanged, the output power remains unchanged for a short time, and the loop current suddenly increases suddenly, it often leads to overcurrent of the air conditioner and damages its internal load or circuit board. ; When the power supply has an instantaneous overvoltage, if it exceeds the withstand voltage value of the components at this time, it will often lead to overvoltage of the air conditioner and damage its internal load or circuit board

Method used

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  • Protection circuit for air conditioning controller, and control method for protection circuit
  • Protection circuit for air conditioning controller, and control method for protection circuit
  • Protection circuit for air conditioning controller, and control method for protection circuit

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Embodiment Construction

[0040] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0041] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0042] Refer below figure 1 A protection circuit of an air conditioner controller according to an embodiment of the present invention will be described.

[0043] Such as figure 1 As shown, accordi...

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Abstract

The invention provides a protection circuit for an air conditioning controller, and a control method for the protection circuit. The protection circuit comprises a thermistor, a relay, a rectificationmodule, a voltage sampling module, and an MCU. A first input end of the rectification module is connected with a live line end of the commercial power, a second input end of the rectification moduleis connected with a zero line end of the commercial power, and an output end of the rectification module is connected to the MCU through the voltage sampling module. The thermistor is connected in series between the first input end of the rectification module and the live line end of the commercial power. The relay is in parallel connection with two ends of the thermistor. The MCU is used for detecting a DC bus voltage of an output end positive electrode of the rectification module, and controls the on / off of the relay according to the DC bus voltage. According to the invention, when the overvoltage or undervoltage condition of a power supply is found, the relay is timely cut off, and the abrupt changes of the current or voltage are prevented through the characteristic that the internal resistance of the thermistor increases when the thermistor generates heat, thereby achieving the purpose of protecting rear-stage loads, prolonging the service life of an air conditioner, and improvingthe electric control reliability.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a protection circuit of an air conditioner controller and a control method for the protection circuit of the air conditioner controller. Background technique [0002] When the power supply is undervoltage instantaneously, because the load of the air conditioner remains unchanged, the output power remains unchanged for a short time, and the loop current suddenly increases suddenly, it often leads to overcurrent of the air conditioner and damages its internal load or circuit board. ; When the power supply has an instantaneous overvoltage, if it exceeds the withstand voltage value of the components at this time, it will often lead to overvoltage of the air conditioner and damage its internal load or circuit board. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. [0004...

Claims

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Application Information

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IPC IPC(8): H02H3/08H02H3/20H02H3/24H02M1/44
CPCH02H3/085H02H3/207H02H3/24H02M1/44
Inventor 陈斐
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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