Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a blowing/drawing-in device, which can work under a blowing mode or a drawing-in mode and comprises a housing (14) which has a first opening (12) in communication with the exterior; an air duct (2) which is connected to the housing (14); an air flow generation device, which can generate an air flow in an operable manner, the air flow being blown out via the air duct (2) when the blowing/drawing-in device is under a blowing mode and the air flow being drawn in via the air duct (2) when the blowing/drawing-in device is under a drawing-in mode; and a collection device (200) used for collecting the drawn-in item when the blowing/drawing-in device is under the drawing-in mode, the collection device (200) being connected to the first opening (12) both under the blowing mode and the drawing-in mode. The blowing/drawing-in device also comprises an air inlet part (202), the air inlet part (202) is opened under the blowing mode and the air inlet part (202) is closed under the drawing-in mode.
A: An air blower comprising: a housing (200), where an air inlet (203) is provided on the housing (200) and air is introduced via the air inlet (203); a motor (300) arranged within the housing (200); an axial flow fan driven by the motor (300) to rotate around a fan axis and to produce an airflow; an air blowing pipe (422) connected to the housing (200) and provided with an air outlet (601), where the airflow is blown out from the air outlet (601); and a duct (400) used for guiding the airflow to move towards the air outlet (601). An airflow channel (602) is provided within the housing (200) and the air blowing pipe (422). The airflow channel (602) comprises an upstream area(201) between the air inlet (203) and the axial flow fan and a downstream area (202) between the axial flow fan and the air outlet. The motor (300) is provided in the upstream area (201). The duct (400) is provided in the downstream area (202).
B: A robot, a robot system, a dust bin (4), and a control method. The robot comprises a body (2) provided with a suction port (3) and a dust bin (4), the suction port (3) being communicated with the dust bin (4). The dust bin (4) is provided with a plurality of dust discharge ports (6) and a dust inlet port (5) communicated with the suction port (3). When the body (2) is in a first operation mode, the plurality of dust discharge ports (6) is closed, and a substance on a surface where the body (2) is located is collected into the dust bin (4) through the suction port (5); and when the body (2) is in a second operation mode, the plurality of dust discharge ports (6) cooperates to discharge the stored substance in the dust pin (4) under the action of a suction airstream. The present invention is used for effectively reducing the amount of residual dust in the dust bin (4).
C: An atomization device supporting multiple smoking modes and a using method therefor. The atomization device comprises the following components: a main machine casing (7), a main frame (2), an upper end cover (1), an atomizer (5) disposed on a base (211) of the atomizer, and a lower end cover (4). The atomization device supports three smoking modes, and the smoking modes and airflow channels can be switched synchronously; an accurate aroma production temperature control under low-baking is achieved, cigarettes are fully used, and a great comfort of smoking is provided. Further provided is a using method for the atomization device.
D: An intelligent mower (100). The intelligent mower moves and works in a working region, and comprises: a housing (10); a moving module (30) mounted in the housing and driving the housing to move; a cutting module (12) mounted in the housing and used for cutting grass in the working region; a crushing module (14) mounted in the housing, and capable of collecting fallen leaves in the working region and crushing same; and a control module that is electrically connected to the moving module, the cutting module, and the crushing module, and controls the intelligent mower to move and work. The intelligent mower has a first working mode, wherein under the first working mode, the control module controls the cutting module to perform working; and a second working mode, wherein under the second working mode, the control module controls the crushing module to perform working. The intelligent mower has the advantageous effects of: comprising a leave crushing component and having the function of treating fallen leaves.
Answer: A