An open-circuit detection circuit of an internal and external circulation motor of an air-conditioning controller

Abstract

The invention provides an internal and external circulation motor open-circuit detecting circuit of an air conditioner controller. The detecting circuit includes a MCU main control unit, the MCU main control unit is provided with an internal circulation control signal output end and an external circulation control signal output end, and the internal circulation control signal output end and the external circulation control signal output end are connected with the internal circulation control signal input end and external circulation control signal input end of a motor drive chip respectively; the MCU main control unit is further provided with an open-circuit detecting enable end and an open-circuit detecting terminal, and the open-circuit detecting enable end and the open-circuit detecting terminal are connected with an open-circuit diagnostic circuit which is provided with a triode. The internal and external circulation motor open-circuit detecting circuit of the air conditioner controller is arranged in an air conditioning controller PCB external circuit together with a motor, the total cost is low, the development cycle is short, an air conditioning system box does not need to be opened, testing and detecting can be achieved at any time, operation is convenient, the detection efficiency is and the detection is precise.

Description

technical field [0001] The invention relates to the technical field of air conditioner controller detection, in particular to an open circuit detection circuit of an inner and outer circulation motor of an air conditioner controller. Background technique [0002] At present, the air-conditioning controller system is equipped with internal and external circulation motors, but in order to save costs, the customer has not set up a position feedback circuit for the internal and external circulation motors. In the production process of the vehicle, if the internal and external circulation motor is disconnected from the connector, and the circuit itself does not have an open circuit detection circuit outside the air conditioner controller PCB board that detects the opening and closing of the internal and external circulation motor, it will make it difficult for the client to find the problem At the same time, it is often necessary to disassemble the air-conditioning system box to ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an open-circuit detection circuit for an internal and external circulation motor of an air-conditioning controller, which solves the problem that an open circuit diagnostic circuit including a triode and a voltage dividing resistor is provided between the drive signal input end of the internal and external circulation motor and the MCU main control unit to detect the internal and external circulation. Technical problem of motor open circuit

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