Exhaust sensor fault detection method and device, air conditioner and storage medium
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An exhaust sensor and fault detection technology, which is applied in the field of equipment fault handling, can solve problems such as false alarms of exhaust sensor faults, and achieve the effects of avoiding fault false alarms, solving false alarms of exhaust sensor faults, and improving reliability
Active Publication Date: 2021-08-13
NINGBO AUX ELECTRIC +1
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Problems solved by technology
[0004] In view of this, the present invention aims to propose a method, device, air conditioner and storage medium for detecting exhaust gas sensor failure. The default exhaust temperature performs air conditioning control, which solves the problem of false alarms of low-temperature heating exhaust sensor failures in the prior art, achieves reliable identification of detection scenarios, accurate detection of faults, and ensures reliable operation of the system under low temperature conditions
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Embodiment 1
[0047] The invention discloses a fault detection method of an exhaust sensor, which comprises the following steps:
[0048] S1: The air conditioner operates in heating mode;
[0049] S2: Record the outdoor evaporator temperature Th before the compressor is turned on;
[0050] S3: Determine whether the temperature Th of the outdoor evaporator before starting the machine is lower than the first preset threshold value A, if not, perform a conventional exhaust sensor fault detection procedure; if so, enter S4;
[0051] S4: If the temperature Th of the outdoor evaporator before starting up is less than the second preset threshold B, go to S5;
[0052] S5: During the start-up process of the compressor, the open-circuit fault of the exhaust sensor is no longer judged, and the default exhaust temperature is used for processing, and the air conditioner operates normally;
[0053]Among them, the first preset threshold value A, the second preset threshold value B, and the default exhau...
Embodiment 2
[0079] The invention discloses a fault detection method of an exhaust gas sensor, which specifically includes the following steps:
[0080] ST1: start the air conditioner;
[0081] ST2: Read pre-stored data first preset threshold value A, second preset threshold value B, third preset threshold value C, fourth preset threshold value D, fifth preset threshold value E, fixed threshold value F ;
[0082] ST3: Record the indoor condenser temperature Te and the outdoor evaporator temperature Th1 before the compressor is turned on;
[0083] ST4: Determine whether it is heating and starting, if so, enter ST5; if not, return to ST3;
[0084] ST5: Determine whether Th
[0085] ST6: Determine whether Th
[0086] ST7: Sampling real-time indoor condenser temperature Te, compressor operating frequency Fre;
[0087] ST8: Determine whether Te>C, if yes, enter ST9; if not, return to ST7;
[0088] ST9: Det...
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Abstract
The invention provides an exhaust sensor fault detection method and device, an air conditioner and a storage medium. According to the temperature interval where the temperatureTh of an outdoor evaporator before starting up is located, when the temperature of an outdoor heat exchanger before starting up is lower than a second preset threshold value, air conditioner control is executed with the default exhaust temperature in the starting up process; when the temperature of the outdoor heat exchanger before starting is not lower than the second preset threshold value and is lower than a first preset threshold value, sensor faults are detected after normal heating is met; and when the temperature of the outdoor heat exchanger before starting is not lower than the first preset threshold value, conventional sensor fault detection is executed. According to the exhaust sensor fault detection method disclosed by the invention, the problem that the exhaust sensor fault is misreported at the extreme low temperature is solved, so that the air conditioner operates normally at the default exhaust temperature, the phenomenon that the exhaust sensor misreports the open-circuit fault during the starting is avoided, and the reliability of system operation is improved.
Description
technical field [0001] The invention relates to the technical field of equipment fault handling, in particular to a fault detection method and device for an exhaust gas sensor, an air conditioner and a storage medium. Background technique [0002] The exhaust gas sensor is an important part to detect the working state of the system. In order to ensure normal detection at high temperature, the temperature detection lower limit of the general exhaust gas sensor is around -20°C. Under extreme low temperature conditions in the north, there may be a phenomenon that the exhaust sensor may falsely report an open circuit fault, resulting in a decrease in system reliability. [0003] In the prior art, when an equipment component fails during operation, the faulty component is determined, and then temporary replacement data is obtained, and then the temporary replacement data is used as the operation data of the faulty component to control the operation of the equipment, so that the ...
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