A housing for a handheld vacuum cleaner includes a suction opening, a cyclone chamber, and a helical passage. The suction opening is defined in the housing. The cyclone chamber is in fluid communication with the suction opening. The helical passage includes a first end, a second end, and at least one sidewall. The first end is in fluid communication with the suction opening. The second end is in fluid communication with the cyclone chamber. The at least one sidewall extends between the first end and the second end. The at least one sidewall separates the helical passage from the cyclone chamber.

Disclosed is a suction nozzle, which includes a suction nozzle body and a sealing ring. One end of the suction nozzle body is provided with a suction port, and the other end of the suction nozzle body is provided with a drainage port. A drainage channel communicating with the suction port and the drainage port is formed inside the suction nozzle body. The drainage port is configured to communicate with the sewage tank of a cleaning device. The suction nozzle body is configured to be rotatably installed to the device body of the cleaning device so as to have a working position that maintains the suction port fitting a surface to be cleaned. The sealing ring is provided at the drainage port, configured to seal a fitting clearance between the suction nozzle body and the sewage tank and capable of elastically deforming.

The present invention discloses a handheld electric cleaner, including: a housing, a motor, a battery, a sewage tank, and the like, and further including a water suction opening and an air outlet on the sewage tank, and a water suction channel inside the sewage tank, where the water suction channel is arranged to include a rear channel, a middle channel, and a front channel that are sequentially in communication. Moreover, the rear channel runs through a bottom surface of the sewage tank to form the water suction opening, the middle channel is in communication with the front channel through a side channel inside the sewage tank, and the front channel runs through a top surface of the sewage tank to form the air outlet. In this way, a suction path of the water suction channel is lengthened, and an internal structure of the water suction channel is designed uniquely, to better prevent water vapor in the sewage tank from being directly sucked into the air suction opening and corroding internal devices of the motor, thereby ensuring the use reliability of the handheld electric cleaner and extending a service life. In addition, the sewage tank is further detachably configured at a bottom of the housing, and the motor is transversely arranged and mounted at a front part of the housing, so that the structural design is more compact, the volume is small, and the appearance is more beautiful.