Abstract: A turbomachine has a housing with at least one flow channel, an impeller which is arranged in the housing, and a drive motor. The drive motor is used to drive the impeller in order to suction a fluid into the housing through the at least one flow channel and/or to convey the fluid out of the housing through the at least one flow channel. The housing is produced by an additive manufacturing process. Further disclosed is a turbomachine in which the impeller is produced in an injection molding method and is molded directly onto the rotor of a drive motor designed as an external rotor motor.

Abstract: A radial turbomachine has a first housing part and a second housing part, which jointly form and delimit a flow channel. The first housing part forms a motor chamber for accommodating a drive motor, and the second housing part forms a gas inlet. Furthermore, a radial impeller is provided, which can be driven about an axis of rotation by the drive motor in order to suction a gas from outside the turbomachine through the gas inlet into the flow channel and to convey said gas out of the flow channel through a gas outlet to the outside. The first housing part or the second housing part forms the gas outlet at a radial distance from the axis of rotation and peripherally delimits the gas outlet.

Abstract: A stator has a first bearing for a first end of a shaft of the rotor, and a second bearing for a second end of the shaft. The first and the second bearings have a respective permanent magnet which exerts a magnetic force on the shaft. Alternatively, the shaft is in the form of a permanent magnet and the first and the second bearing have a respective ferromagnetic part. At least one of the two ends of the shaft is supported axially by means of a point bearing. The apparatus is, for example, a fan.

Abstract: The cooling device has a fan having a fan wheel, and a heat sink, through which there is a flow for cooling purposes when the fan wheel rotates. The heat sink has guide vanes deviating from the radial direction and is embodied as an integral shaped part. In particular, the guide vanes are embodied in spiral fashion. The cooling device serves, in particular, for cooling an LED lamp.

Abstract: The brushless DC electric motor comprises, a rotor including a shaft and a permanent magnet fixed on said rotor shaft, stator including a winding in the shape of a hollow cylinder and composed of a plurality of rhombic single coils made of flat wire. The single coils overlap each other in an imbricated manner, wherein the single coils are performed to form an offset at least in the region of two opposite corners. The winding have legs, wherein half of the legs are located in a first radius and half of the legs are located in a second radius. The motor further comprises a housing having two end plates and supporting said rotor and stator.

Abstract: The brushless DC electric motor comprises, a rotor including a shaft and a permanent magnet fixed on said rotor shaft, stator including a winding in the shape of a hollow cylinder and composed of a plurality of rhombic single coils made of flat wire. The single coils overlap each other in an imbricated manner, wherein the single coils are performed to form an offset at least in the region of two opposite corners. The winding have legs, wherein half of the legs are located in a first radius and half of the legs are located in a second radius. The motor further comprises a housing having two end plates and supporting said rotor and stator.

Abstract: The apparatus has a carrier for accommodating a plurality of series-connected energy cells, which each have a positive terminal and a negative terminal. An electrical contact is provided in the carrier for each terminal, which electrical contacts, when the energy cell is inserted, connect said energy cell to connection points for drawing energy. Each positive terminal and in each case the associated negative terminal are electrically connected to one another via a switch. These switches are designed such that they are in each case interrupted when an energy cell is inserted. The invention then also makes possible current consumption if fewer than the maximum possible number of energy cells are available.

Abstract: A respirator has a filter that is located in an air duct. A blower has an air conduction housing and an impeller wheel located in said air conduction housing, with an impeller wheel that is rotationally mounted inside said housing. The blower is controlled by a sensor. The output of the blower is controlled by means of an electronic control circuit. The sensor is a volume flow or mass flow sensor located in the air duct, and is independent of the blower and controls the blower by means of the control circuit so that the flow of respiratory air remains essentially constant.

Abstract: A direct-current motor has a single coil having a plurality of active branches and a rotor having a permanent magnet. The active branches are arranged in sequence essentially without gaps. The permanent magnet has magnetic segments which overlap all the active branches. The number of magnetic poles is at least equal to the number of active branches. As a result of the magnetic overlap of the coil and the permanent magnet, a greater efficiency is achieved.

Abstract: An axial mini ventilator having an air conduction housing with an impeller wheel on the suction-side end of a tubular flow channel. Formed on the inside of the air conduction housing are air baffles which support the stator of an electric drive motor for the impeller wheel. The tip and/or root lines of the baffles are essentially segments of a parabola. The parabolas are oriented so that their point of origin is on the pressure-side end of the flow channel, and their plane of symmetry runs at right angles to the direction of flow. As a result of this configuration of the baffles, the turbulence in the flow channel can be reduced and the efficiency can be significantly increased.

Abstract: A device for connecting a fan to the inlet of a face mask filter including an adapter having resilient arms to fasten it to the filter and an air duct extends from the fan outlet to the filter inlet. The adapter has an internal seal to connect the outlet end of the air duct to the inlet of the filter. A housing for the fan is partly molded directly on the adapter adjacent to the inlet end of the air duct. The air duct is short and straight and has low flow resistance.

Abstract: The small fan has an air conduction housing (2) of plastic, in which an impeller (1) is rotatably supported. It is designed as a meridian-accelerated fan. The blades (1a) of the impeller (1) are not twisted and have the same angle of pitch over the entire blade length. The leading edges of the impeller (1b) and the front side of the hub (1c) as well as the front side of the housing (2d) lie approximately in the same plane. In contrast to axial fans, the meridian-accelerated fan has a higher power density along with a lower noise development.

Abstract: A respiratory protection device having a housing with a housing arm on which a filter having an inlet and an outlet is detachably mounted. The housing has a suction opening for ambient air that is generally covered by a portion of the filter. Spaces are formed between the filter and the housing through which ambient air can pass to the suction opening. A radial blower is located in the housing in communication with the suction opening to convey ambient air under pressure through a channel located in the housing arm to the filter. The covering of the suction opening by the filter prevents water drip or spray from passing into the interior of the housing and prevents accidental covering of the opening.

Abstract: An axial securing device for the shaft of a small motor in which one end of the shaft is solidly connected with a rotor and the other end is supported in a thrust bearing of a stator. A securing element is locked into an annular groove of the shaft. The securing element has an inwardly directed bulge and a cylindrical projection. When the shaft is inserted, the securing element is pushed in front of the annular groove during the radial extension and locks into the annular groove by itself during further axial movement. The projection is so dimensioned so that through this movement its underside surrounds the contact surface of the shaft end.