A blower comprising a blower housing, a blower wheel, and a motor. The blower wheel is within the blower housing and has a plurality of blades. The motor is operatively connected to the blower wheel to rotate the blower wheel about an axis of rotation. The blower housing comprises a wall perpendicular to the axis of rotation. The wall has a static tap hole having a leading edge and a trailing edge. The static tap hole is positioned near an axial side of the blower wheel such that as the blower wheel rotates, any of the blades of the blower wheel passes the leading edge of the static tap hole before passing the trailing edge of the static tap hole. The wall comprises a protrusion protruding axially from the wall and toward the blower wheel. The protrusion is located adjacent the trailing edge of the static tap hole.

A ventilating apparatus includes a panel, a motor, a circuit assembly, and the apparatus stops an operation of the motor and notify a user when the panel is opened independently of a specific driving condition. The circuit assembly includes a switch which is closed when the panel is coupled to a body, and opened when at least a part of the panel is separated from the body, a motor of which an operation is stopped when the switch is opened, and a microcomputer which is connected to the switch and outputs a notification signal in response to the opening of the switch..

A vehicle battery jump starter with air pump device includes a vehicle battery jump starter and an air pump disposed within a cover. An internal battery is also disposed within the cover and connected to the vehicle battery jump starter and the air pump. A port is provided so as to provide connection to the device from an external vehicle battery. The air pump is configured such that it is powered by the external battery in a first mode of operation.

A high and low-pressure integrated air pump includes a single housing including an air inlet and an air outlet. A high-pressure pump is disposed within the housing and in fluid communication with the air inlet, and uses a first outlet passage to discharge to the air outlet. A low-pressure pump is also disposed within the housing and in fluid communication with the air inlet, and uses a second outlet passage to discharge to the air outlet.

A shaft seal for an exhaust fan. The seal limits leakage from within an exhaust fan housing around an exhaust fan drive shaft that extends between a rotational power source exterior to the exhaust fan housing and a position within the exhaust fan housing. The seal comprises a plenum generally positioned about the exhaust fan drive shaft at the point where the shaft extends into the fan housing; an auxiliary blower comprising a housing, an internal blade driven by an auxiliary blower drive shaft, and an auxiliary blower drive to rotate the drive shaft where the auxiliary blower drive is operatively associated with the rotational power source such that operation of the rotational power sources causes a rotation of the exhaust fan drive shaft and the auxiliary blower drive shaft; and a duct fluidly connecting the auxiliary blower housing to the plenum.

A compressor (1), or ventilator/anesthesia device with the compressor, includes a housing, a rotatable impeller (6) connected via a drive shaft (4) to an electric motor (5) to deliver gas from an inlet (8), upstream on a suction side (7) through a flow duct (11) to a downstream outlet (10) on a delivery side (9). The compressor impeller is partially enclosed by the housing, as a collection housing (2) on the delivery side, and a cover element (12), on the suction side separated in sections from the compressor impeller by a gap (13). An uncoupling element (15) is arranged, for vibration damping and for at least partial sealing of the housing interior against a surrounding area (16), between the cover element and the collection housing and between a functional component (14) connected at least indirectly to the compressor impeller and/or to the electric motor and the collection housing.

A device for discharging exhaust air from the surroundings of a metal strip. The device has air quantity boosters with an opposing suction device on the other side of the conveying path in the blowing direction in order to suction and discharge the airflow generated by the air quantity boosters together with the exhaust air. In order to reduce costs for the operation of the device, a sensor device is provided in order to detect whether the metal strip is present or not and at which speed the metal strip is being moved. Additionally, a controller is provided in order to adjust the delivery rate of the air quantity boosters and the suction device depending on the measured speed.

In one aspect, a fan array fault response control system is provided for a cooling tower. The fan array fault response control system includes a fan interface configured to be in communication with a plurality of fans of the cooling tower and a processor operably coupled to the fan interface. The processor is configured to detect at least one non-operational fan of the plurality of fans. The processor configured to effect, in response to detecting the at least one non-operational fan, a reduced fan speed of at least one operational fan of the plurality of fans.

The present disclosure provides an electric air pump which includes: a first housing including a cavity; a first air pump arranged inside the cavity, the first air pump being provided with a fan blade cover that divides the cavity into a fan blade cavity and a driving cavity; a switch driving device arranged inside the driving cavity, connected to the first air pump, and adapted to drive a switching between air passages; an air pressure sensor arranged inside the driving cavity for detecting an internal pressure value of an inflatable body; a central control unit arranged inside the driving cavity and electrically connected to the first air pump, the switch driving device, and the air pressure sensor; and at least one panel covering the cavity opening of the cavity. The electric air pump can precisely control an inflation pressure, and automatically and silently supplement air via an air supplement pump.

A fan includes a first blower and a second blower each having an impeller. The first blower includes a first motor and a first motor drive controller to control driving of the first motor and communicate with the second blower. The second blower includes a second motor and a second motor drive controller to control driving of the second motor and communicate with the first blower. The first motor drive controller controls the driving of the first motor based on a result of communication with the second blower.