A method and device for detecting failure of an air conditioner low pressure sensor, and an air conditioner
A low-voltage sensor and detection method technology, which is applied in the field of air conditioning, can solve the problems of not being able to meet the needs of users well, and the absence of fault detection of low-voltage sensor of air conditioners, etc.
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Embodiment 1
[0050] This embodiment provides a detection device for the failure of the low pressure sensor of the air conditioner, such as figure 2 As shown, the detection device includes: a main control device and a display panel.
[0051] Wherein, the main control device includes a pressure sensor, a temperature sensor, a data recording module, a timer and a controller;
[0052] The pressure sensor and the temperature sensor are used to acquire the low pressure value, high pressure value and temperature information of the low pressure end of the air conditioner. The data recording module is used to determine the first difference between the low pressure value and the high pressure value of the air conditioner when the air conditioner is stopped, and determine that the temperature information of the low pressure end of the air conditioner is lower than the low pressure value when the air conditioner is running The second difference corresponding to the saturation temperature. A timer, ...
Embodiment 2
[0056] This embodiment provides a detection method for the failure of the low pressure sensor of the air conditioner, such as image 3 As shown, the method includes the following steps:
[0057] S1. When the air conditioner is shut down, determine a first difference between the low pressure value and the high pressure value of the air conditioner, and calculate the value according to the first difference and the first duration for which the first difference is greater than a first threshold. Perform pre-detection for the failure of the air conditioner low pressure sensor.
[0058] S2. Determine whether to re-detect the fault when the air conditioner is running according to the pre-detection result. If the first difference is greater than a first threshold and the first duration is greater than a time threshold, it is determined that the pre-detection result indicates that the fault needs to be re-detected when the air conditioner is running.
[0059] The first threshold A is...
Embodiment 3
[0069] A multi-connected air-conditioning unit was shut down for 30 minutes, and the first difference between the low pressure value and the high pressure value was detected to be greater than 4 bar for 5 minutes.
[0070] If the first difference is greater than 4 bar, it indicates that the pressure is abnormal, and further retesting is required.
[0071] Subsequent start-up and heating operation, continuous 10min detects that Tci is 6°C, Ts is -20.7°C, Pst is 13.7°C, Tci-Pst=7.7°C, Ts-Pst=34.4°C, Tci and Ts are less than the saturation corresponding to the low pressure value Too much temperature.
[0072] In summary, it is judged that the detection value of the low pressure sensor is abnormally high, and the unit displays a fault code.
[0073] Among them, Tci is the inlet temperature of the gas-liquid separator, Ts is the suction temperature of the compressor, and Pst is the saturation temperature corresponding to the low pressure value.
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