Sensor plate group, photoelectric sensor and cleaning device

The utility model discloses a sensor board group, a photoelectric sensor and a cleaning device, which are characterized in that a hollow area is arranged on a printed circuit board (PCB), so that detection light emitted by an emitting part on one side of the hollow area is prevented from being conducted to a receiving part on the other side of the hollow area through the PCB, and the detection accuracy of the sensor is prevented from being influenced by interference of the detection light in the board. And meanwhile, the transmitting part and the receiving part are arranged on the same PCB, so that the cost is further reduced, and the internal space of the photoelectric sensor is saved. 本实用新型公开一种传感器板组、光电传感器及清洁装置，本实用新型通过在PCB板上设置挖空区，以隔绝挖空区一侧的发射部发射的探测光经PCB板传导至另一侧的接收部，避免探测光在板内产生干扰以影响传感器的检测准确度，同时将发射部和接收部设置在同一块PCB板上也进一步降低了成本，节省了光电传感器的内部空间。