A vacuum system includes at least one cryopump; sensors associated with the cryopump, each of the sensors being configured to sense an operating condition of the cryopump; and diagnostic circuitry configured to receive signals sampled from the sensors. The diagnostic circuitry includes a diagnostic model of the cryopump, the diagnostic model being derived from historical data of a plurality of cryopumps of a same type operating over a plurality of regeneration and servicing time periods and being configured to relate values of the sampled signals from the at least some sensors to a probability of the pump failing within a predetermined time. The diagnostic circuitry is configured to apply the sampled signals to the diagnostic model and to determine the probability of the at least one cryopump failing within a predetermined time from an output of the model.

An electric blower includes: an electric motor portion including a rotation shaft; a centrifugal impeller; and a heat dissipating portion connecting the centrifugal impeller and the rotation shaft. A boss portion of the centrifugal impeller is provided with a first hole extending in an extending direction of the rotation shaft. The heat dissipating portion includes a first portion connected to an inner circumferential surface of the first hole, and a second portion connected to the first portion in the extending direction and located outside the first hole. A length of the heat dissipating portion in the extending direction is longer than a length of the first hole in the extending direction.

A vacuum cleaner with a reduced frictional force between a vacuum base and a cleaning medium is described. The vacuum has a handle, yoke, body, and base. A handle and yoke distinct from, and behind, the base provides a moment arm anterior to the base when a force is applied. The handle and yoke assembly reduce the friction between the cleaning surface and the vacuum, allowing for larger motor and debris capturing capabilities, with easier handling and maneuverability resulting in advanced and superior cleaning capabilities.

A charging device is provided. The charging device includes an output terminal unit connected to an input terminal unit of a battery pack. The output terminal unit includes a terminal body including an output terminal connected to the input terminal unit and a terminal cover which covers the output terminal before the input terminal unit of the battery pack is connected to the output terminal unit and through which the output terminal passes while the input terminal unit of the battery pack is connected to the output terminal unit.

A hand vacuum cleaner may include a suction motor and fan assembly that is positioned downstream of a pre-motor filter. A post motor filter may be positioned downstream of the suction motor and fan assembly and may be in the lower end of the hand vacuum cleaner and an energy storage member may be in an upper end of the handle.

A surface cleaning apparatus includes a floor cleaning unit and a portable surface cleaning unit. The floor cleaning unit includes a surface cleaning head and an upper section moveably mounted to the surface cleaning head between an upright storage position and a rearwardly inclined floor cleaning position. The portable surface cleaning unit is connectable to the floor cleaning unit, and includes a portable surface cleaning unit air inlet connectable in air flow communication with the floor cleaning unit, a main body, an air treatment member, a suction motor, a handle and a capacitor. A remote charger is provided wherein the capacitor is rechargeable at a rate of at least 4 C.

An autonomous mobile robot includes a body, a drive supporting the body above a floor surface, a light-propagating plate positioned on the body and having a periphery defining a continuous loop, light sources each being positioned to direct light through a portion of the plate to a portion of the continuous loop, and a controller to selectively operate the light sources to provide a visual indicator of a status or service condition of the autonomous mobile robot. The drive is configured to maneuver the mobile robot about the floor surface.

An autonomous floor-traversing robot includes: a wheeled body including a chassis and at least one motorized wheel configured to propel the chassis across a floor, the chassis defining an interior compartment disposed beneath a chassis ceiling; a cover extending across at least a central area of the chassis ceiling; and a graspable handle connected to the chassis and located outside the cover so as to be accessible from above the robot, the handle arranged to enable lifting of the robot. The chassis ceiling defines drainage channels configured to conduct the liquid away from the central area of the chassis ceiling.

A motor in a dust collector is cooled. The dust collector includes a body housing, a motor located inside the body housing, a cooling fan rotatable by the motor to feed a gas to around the motor and to discharge the gas from around the motor, and a support including a channel through which the gas is flown by the cooling fan. The support supports the motor.

A dust collector cools a controller. The dust controller includes a body housing, a motor located inside the body housing, a fan rotatable by the motor, a controller that controls the motor, and a thermal insulator between the motor and the controller. The thermal insulator defines a flow channel through which an airflow generated by the fan passes.