Baffle device for flue and gas water heating device

A baffle device for a flue, wherein the baffle device comprises a baffle plate, a driving mechanism and a detecting mechanism;

• the baffle plate is configured to be disposed in a flue to conduct or block flue gas in the flue;
• the driving mechanism is configured to drive the baffle plate to rotate, and comprises a driving source and a rotating shaft, wherein one end of the rotating shaft is configured to be driven by the driving source and the other end of the rotating shaft is configured to drive the baffle plate to rotate;
• the detecting mechanism comprises a blocking member and a photoelectric sensor, the photoelectric sensor comprises a light emitting portion and a light receiving portion, and the blocking member is configured to block light emitted by the light emitting portion so that the light is effectively received or not effectively received by the light receiving portion;
• one of the blocking member and the photoelectric sensor is disposed on the rotating shaft, there is provided with a supporting member at a preset distance from the rotating shaft, and the supporting member is configured to support the other of the blocking member and the photoelectric sensor.