Abstract: The system comprises a rainfall monitoring module, a self-calibration and rainfall measurement module, a central processing module, a water level monitoring module, and a drainage module. The rainfall monitoring module is configured to monitor rainfall and send a rainfall signal to the central processing module. The self-calibration and rainfall measurement module is configured to transmit ultrasonic signals and receive calibration echo signals to compute the calibrated flight time, and transmit ultrasonic signals to the water surface in the bucket and receive the measured echo signal reflected by the water surface to obtain the measured flight time under the control of the central processing module. The central processing module is configured to receive the rainfall signal to start the water level monitoring module and the self-calibration and rainfall measurement module, which are used to calculate the rainfall value and output it in a fixed format.

Abstract: The present invention discloses a refrigerator and a control method thereof. The refrigerator comprises a door body with an inner door and an outer door, a locking mechanism for locking the outer door, an unlocking mechanism for unlocking the outer door, and a detection unit for detecting an open state and a closed state of the inner door. The present disclosure avoids damages caused by collision between the inner door and the outer door when the outer door is opened, and also avoids simultaneous opening of the inner door and outer door and facilitates the user to use and achieves an energy-saving effect.

Abstract: The present invention discloses a door-in-door having a display screen assembly and a refrigerator having the same. The door-in-door comprises a first door body and a second door body; the first door body has a transparent panel, and the second door body is provided with a display screen assembly. When the first door body closes the cabinet, a display interface of the display screen assembly is displayed through the transparent panel of the first door body. According to the present invention, an operation state of the refrigerator can be learnt about without opening the first door body.

Abstract: The present invention discloses a refrigerator and a control method thereof. The refrigerator comprises a door body with an inner door and an outer door, a locking mechanism for locking the outer door, an unlocking mechanism for unlocking the outer door, and a detection unit for detecting an open state and a closed state of the inner door. The present disclosure avoids damages caused by collision between the inner door and the outer door when the outer door is opened, and also avoids simultaneous opening of the inner door and outer door and facilitates the user to use and achieves an energy-saving effect.

Abstract: The present invention discloses a door-in-door having a display screen assembly and a refrigerator having the same. The door-in-door comprises a first door body and a second door body; the first door body has a transparent panel, and the second door body is provided with a display screen assembly. When the first door body closes the cabinet, a display interface of the display screen assembly is displayed through the transparent panel of the first door body. According to the present invention, an operation state of the refrigerator can be learnt about without opening the first door body.