An actuating mechanism for actuating valves in group, comprising: an actuating shaft configured to be rotatable; an actuated member to be actuated by the actuating shaft to rotate; and an engaging and disengaging structure comprising an actuating structure provided on the actuating shaft and an actuated structure provided on the actuated member; wherein when the actuating structure engages with the actuated structure, the actuating structure can drive the actuated structure to rotate, such that the actuating shaft can drive the actuated member to rotate; wherein the actuated member comprises a first valve body and a second valve body rotatable about a first axis; wherein the engaging and disengaging structure comprises: a first engaging and disengaging structure including a first engageable and disengageable actuating structure and a first engageable and disengageable actuated structure; and a second engaging and disengaging structure including a second engageable and disengageable actuating structure and a second engageable and disengageable actuated structure; wherein the first engageable and disengageable actuating structure on the actuating shaft comprises first transversal plate and a plurality of first rods (424,426,428), and the first transversal plate connects with the actuating shaft, and wherein the plurality of first rods (424,426,428) are provided on the first transversal plate; wherein the second engageable and disengageable actuating structure on the actuating shaft comprises a second transversal arm and a second rod, the second transversal arm connects with the actuating shaft, and the second rod is provided on the second transversal arm; wherein the first engageable and disengageable actuated structure on the first valve body comprises a plurality of first grooves (512,513,514,515,516,517) provided on the first valve body; wherein the second engageable and disengageable actuated structure on the second valve body comprises a second groove provided on lower portion of the second valve body; and wherein during the rotation of the driving shaft: at least one of the plurality of first rods (424,426,428) can engage with at least one of the plurality of first grooves (512,513,514,515,516,517), such that the driving shaft can drive the first valve body to rotate; and the second rod can be engaged with the second groove, such that the driving shaft can drive the second valve body to rotate. an actuating shaft configured to be rotatable; an actuated member to be actuated by the actuating shaft to rotate; and an engaging and disengaging structure comprising an actuating structure provided on the actuating shaft and an actuated structure provided on the actuated member; wherein when the actuating structure engages with the actuated structure, the actuating structure can drive the actuated structure to rotate, such that the actuating shaft can drive the actuated member to rotate; wherein the actuated member comprises a first valve body and a second valve body rotatable about a first axis; wherein the engaging and disengaging structure comprises: a first engaging and disengaging structure including a first engageable and disengageable actuating structure and a first engageable and disengageable actuated structure; and a second engaging and disengaging structure including a second engageable and disengageable actuating structure and a second engageable and disengageable actuated structure; a first engaging and disengaging structure including a first engageable and disengageable actuating structure and a first engageable and disengageable actuated structure; and a second engaging and disengaging structure including a second engageable and disengageable actuating structure and a second engageable and disengageable actuated structure; wherein the first engageable and disengageable actuating structure on the actuating shaft comprises first transversal plate and a plurality of first rods (424,426,428), and the first transversal plate connects with the actuating shaft, and wherein the plurality of first rods (424,426,428) are provided on the first transversal plate; wherein the second engageable and disengageable actuating structure on the actuating shaft comprises a second transversal arm and a second rod, the second transversal arm connects with the actuating shaft, and the second rod is provided on the second transversal arm; wherein the first engageable and disengageable actuated structure on the first valve body comprises a plurality of first grooves (512,513,514,515,516,517) provided on the first valve body; wherein the second engageable and disengageable actuated structure on the second valve body comprises a second groove provided on lower portion of the second valve body; and wherein during the rotation of the driving shaft: at least one of the plurality of first rods (424,426,428) can engage with at least one of the plurality of first grooves (512,513,514,515,516,517), such that the driving shaft can drive the first valve body to rotate; and the second rod can be engaged with the second groove, such that the driving shaft can drive the second valve body to rotate. at least one of the plurality of first rods (424,426,428) can engage with at least one of the plurality of first grooves (512,513,514,515,516,517), such that the driving shaft can drive the first valve body to rotate; and the second rod can be engaged with the second groove, such that the driving shaft can drive the second valve body to rotate.