Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
  • A61M16/0057—Pumps therefor
  • A61M16/006—Tidal volume membrane pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D13/00—Pumping installations or systems
  • F04D13/02—Units comprising pumps and their driving means
  • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
  • F04D17/08—Centrifugal pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
  • F04D17/08—Centrifugal pumps
  • F04D17/16—Centrifugal pumps for displacing without appreciable compression
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D25/00—Pumping installations or systems
  • F04D25/02—Units comprising pumps and their driving means
  • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
  • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D25/00—Pumping installations or systems
  • F04D25/02—Units comprising pumps and their driving means
  • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
  • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
  • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
  • F04D25/062—Details of the bearings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/02—Selection of particular materials
  • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
  • F04D29/056—Bearings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
  • F04D29/056—Bearings
  • F04D29/059—Roller bearings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/08—Sealings
  • F04D29/083—Sealings especially adapted for elastic fluid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/08—Sealings
  • F04D29/16—Sealings between pressure and suction sides
  • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
  • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/26—Rotors specially for elastic fluids
  • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
  • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
  • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
  • F04D29/4226—Fan casings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
  • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
  • F04D29/4226—Fan casings
  • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
  • F04D29/44—Fluid-guiding means, e.g. diffusers
  • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
  • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
  • F04D29/626—Mounting or removal of fans
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
  • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
  • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
  • F16C25/06—Ball or roller bearings
  • F16C25/08—Ball or roller bearings self-adjusting
  • F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
  • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
  • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
  • F16C35/067—Fixing them in a housing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2250/00—Geometry
  • F05D2250/50—Inlet or outlet
  • F05D2250/52—Outlet
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2260/00—Function
  • F05D2260/30—Retaining components in desired mutual position
  • F05D2260/37—Retaining components in desired mutual position by a press fit connection
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
  • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
  • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
  • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
  • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2360/00—Engines or pumps
  • F16C2360/46—Fans, e.g. ventilators

Definitions

• the invention relates to a radial fan designed as a high-speed radial fan in a compact design.
• Corresponding centrifugal fans include several housing parts for receiving the motor and forming the flow path from the intake via the pressure chamber to the exhaust. At the same time, the flow should be promoted as optimally as possible from intake to exhaust. Good flow conditions improve the efficiency, the pressure build-up and the acoustics of the radial fan.
• radial fans typically have a spiral-like housing which absorbs, brakes and ultimately converts the rapid flow emitted by the radial wheel into usable pressure. Here is a bumpless delay
• the invention has for its object to provide a radial fan which has a compact structure with a small number of parts and at the same time has a high efficiency with improved acoustics.
• a centrifugal fan with a base part, a housing part with blow-out placed on the base part, motor electronics and an internal rotor electric motor which drives a fan wheel via a shaft.
• the motor electronics and a stator of the electric motor are encapsulated in the base part by an encapsulation and together form an integral, one-piece structural unit.
• the radial fan also has a spiral-shaped pressure chamber which increases and is formed by the housing part and the extrusion coating.
• an epoxy-based thermoset is used as the encapsulation and is processed by injection molding.
• the overmolding forms the structure of the base part for receiving the motor electronics and the stator, with corresponding cavities being provided for this in the overmolding.
• plug-in devices for the electrical connection of the radial fan such as, for example, a connecting plug or a plug housing, can also be integrated into the extrusion coating and in particular formed on the outside of the base part.
• Housing part used to provide the spiral geometry of the pressure chamber. Additional components are not required.
• the extrusion coating comprises a projecting ring section extending in the axial direction to the housing part, the axial end face of which determines the pressure space.
• the ring section is also so far from the rest Area of the base part shows that it provides a receiving space for the engine electronics, which is separated from the pressure chamber, that is, encloses the engine electronics components.
• the axial extent of the ring section and the axial end face are geometrically determined so that the spiral shape of the pressure chamber is formed. It is preferably provided that the spiral pressure chamber is generated by an axial and radial expansion. The radial expansion takes place over the width of the axial end face, the axial expansion over the axial height of the ring section.
• the radial fan is further characterized in that the housing part has a constant diameter that delimits the pressure chamber and that a spiral shape of the pressure chamber is determined exclusively by the extrusion coating or the projecting ring section.
• the space available for the centrifugal fan is particularly compact in this version.
• An embodiment is also favorable in which the pressure chamber is arranged on a first axial side of the motor electronics of the electric motor and on a second axial side of the motor electronics, which is opposite the first axial side.
• the engine electronics can thus be cooled by the adjacent flow through the pressure chamber.
• the motor group is separated from the flow with the motor electronics arranged axially in between.
• the motor electronics are preferably arranged on a circuit board and the circuit board is likewise completely enclosed by the extrusion coating.
• the circuit board and the motor electronics or the motor electronics components in the base part arranged on the circuit board are fixed directly by the extrusion coating.
• the centrifugal fan is further characterized in a further development in that the base part has a cylindrical recess about an axis of rotation for the shaft, in which a rotor of the electromotor is fastened to the shaft.
• the cylindrical recess simulates a can of a can motor.
• the stator becomes radially adjacent in the extrusion coating the recess positioned so that the rotor attached to the shaft inserted into the recess interacts with the stator and realizes a can motor.
• the recess has a closed bottom through which
• a further development of the radial fan also provides that an annular flow divider, which surrounds the fan wheel, is arranged radially adjacent to the fan wheel and, together with the housing part, forms a diffuser around the fan wheel, which passes directly into the pressure chamber.
• the flow divider is provided around the fan wheel, which together with the Ven tilator housing provides a diffuser for the flow emerging from the fan wheel, which is in direct flow connection with the pressure chamber and for the fan wheel the uniform back pressure provides.
• the radially ejected air flows through the diffuser from radially inside to radially outside to its radial end and then enters the pressure chamber.
• the entry into the pressure chamber is naturally radially adjacent to the diffuser, but the spiral pressure chamber itself is preferably axially adjacent to the diffuser in an adjacent axial plane, so that the flow from the flow divider flows tangentially into the pressure chamber.
• the flow divider can extend far radially outward, so that the inflow takes place in the radial outer region of the housing part and its spiral-shaped pressure chamber, thereby creating a defined corkscrew vortex. testifies. As a result, turbulence losses in the spiral pressure chamber can be reduced ver.
• the flow divider rests on the extrusion coating.
• a favorable embodiment of the radial fan provides that the flow divider is designed as a sleeve which is inserted into the recess which simulates the containment shell.
• the design as a sleeve enables the flow divider to take on additional functions, for example the bearing of the shaft. At the same time, its position can be determined.
• the flow divider protrudes in the radial direction from a radial inner wall surface of the extrusion coating and thus forms an axial surface of the pressure chamber.
• the spiral pressure chamber is axially adjacent to the diffuser, the flow divider advantageously forming a flow surface for the diffuser on a first axial side and an axial wall surface for the spiral pressure chamber on an opposite axial surface.
• the flow divider has a pot-like axial depression with a diameter that corresponds to an outer diameter of the fan wheel.
• the fan wheel is inserted in sections axially into the recess, so that the flow blown out by the fan wheel is directly influenced by the radially adjoining section of the flow divider that forms the diffuser.
• the depression enables an axially compact construction of the fan wheel and flow divider.
• the radial fan comprises at least one bearing for supporting the shaft, which is arranged between the flow divider and the shaft.
• two axially spaced bearings are provided, which are braced by a spring and are each arranged between the flow divider and the shaft.
• the radial fan is characterized in that the flow divider has a rounded portion, at least in sections, at its free end facing the pressure chamber.
• the rounding is provided at a radial end of the diffuser in order to improve the tangential inflow into the pressure chamber.
• the axially protruding ring section of the extrusion coating has a circumferential axial projection on its radial outer edge section which bears against an inner wall surface of the housing part. This results in an axial depression in the inner part in the pressure chamber, while at the same time a sufficient contact surface between the ring portion of the encapsulation and the housing part is ensured via the circumferential projection.
• Figure 1 is a plan view of a radial fan.
• FIG. 2 is a sectional view B-B of FIG. 1,
• FIG. 3 is a sectional view A-A of FIG. 1.
• Fig. 4 is a perspective sectional view of the radial fan
• FIGS. 1-4 show an exemplary embodiment of a radial fan 1 according to the invention in an axial top view, two sectional views A-A and B-B and a perspective sectional view.
• the radial fan 1 comprises an electric motor designed as an internal rotor with a rotor 22 and a stator 32, which interact in the manner of a can motor.
• the magnets of the rotor 22 are attached to the shaft 7, which extends axially through the radial fan 1 along the axis of rotation RA.
• the fan wheel 3, which is designed as a radial fan wheel, is fixed to the shaft 7 and, during operation, axially sucks air in via its impeller blades via the inlet 69 and blows it out at the outlet 44 via the pressure port 33.
• the radial fan 1 comprises the base part 2 and the housing part 4, which is placed on the base part 2, with the pressure connection 33, which determines the outlet 44.
• the base part 2 is an integral, one-piece structural unit in which the stator 32 of the electric motor, the printed circuit board 10 and the motor electronic components 98 fixed on the printed circuit board 10 for controlling the radial fan 1 are encapsulated by the one-piece plastic encapsulation 17.
• the cylindrical recess 92 is formed about the axis of rotation RA of the shaft 7, in which the shaft 7 and the rotor 22 of the electric motor attached thereto are inserted such that the rotor 22 and the stator 32 lie on an axial plane.
• the bottom 77 of the recess 92 is closed by the extrusion coating 17.
• the extrusion coating 17 forms the projecting ring section 11, which extends in the axial direction parallel to the axis of rotation, the section thereof
• Housing part 4 facing axial face together with the housing part 4 determines the spiral pressure chamber D.
• the radial projection 18 is formed radially on the outside, which forms a contact surface for the inner wall surface of the housing part 4.
• the axial end face of the Ringab section 11 is thus sunk like a tub.
• the ring section 11 forms a radially inner receiving space for the motor electronics 98, as can be clearly seen in FIG.
• the annular flow fan 8 enclosing the fan wheel 3, which together with the inner wall surface of the housing part 4 forms the diffuser 9 around the fan wheel 3.
• the inner wall surface of the outer part 4 and the flow divider 8 run radially outward in the region of the diffuser 9 perpendicular to the axis of rotation RA.
• the free end of the flow divider 8 forms the end of the diffuser 9 and has a rounding R.
• the diffuser 9 goes directly into the pressure chamber D. about.
• the spiral shape of the pressure chamber D is formed exclusively via the inner part 5, the housing part 4 has a constant diameter. With reference to Figures 2 to 4 it can be clearly seen that the pressure space D expands axially and radially by the shape of the ring portion 11.
• the flow divider 8 protrudes from the radial inner wall surface 87 of the inner part 5 in the radial direction and partially forms an upper-side axial surface of the pressure chamber D.
• the pressure chamber D is axially offset, but is directly adjacent to the diffuser 9, so that the fan wheel 3 generated flow flows tangentially from the diffuser 9 into the pressure chamber D.
• the pressure port 33 with the outlet 44 is formed in one piece on the outer part 4 in the extension of the pressure space D and has a round cross section.
• the housing part 4 is sealed by a circumferential seal 25 against the base part 2 on the radial outer wall surface of the ring portion 11. Furthermore, a plug device 93 for inserting a plug and contacting the printed circuit board 10 is provided in one piece on the base part 2.
• the electronic components 98 are encapsulated with the encapsulation 17 in the free space adjacent to the pressure chamber D and thus facing the flow, whereby heat is given off to the flow divider 8 and thus cooling takes place.
• the flow divider 8 rests on the ring section 11 and is, moreover, designed as a sleeve which has a cylindrical tube section inserted into the recess 92 in the axial direction and ends at a distance from the rotor 22.
• the shaft 7 is mounted on the flow divider 8 via two bearings 19.
• the two bearings 19 are clamped ver via the spring 21 in the axial direction.
• the shaft 7 can also be mounted opposite the recess 92 in the base part 2.
• the flow divider 8 On the side of the fan wheel 3, the flow divider 8 has a cup-like axial depression 14, into which the fan wheel 3 is inserted with its base plate, so that the outlet of the fan wheel 3 and the surface of the adjacent flow divider 8 lie flush in an axial plane.
• the diameter of the depression 14 is equal to the outer diameter of the bottom disk of the fan wheel 3, so that a substantially gap-free transition from the fan wheel 3 to the flow divider 8 takes place.
• a minimum gap of preferably 0.2-0.5 mm is provided to ensure the rotation of the fan wheel 3. Essentially gap-free means that the rotation of the fan wheel 3 with respect to the flow divider 8 is ensured.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Health & Medical Sciences (AREA)
• Heart & Thoracic Surgery (AREA)
• Animal Behavior & Ethology (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Emergency Medicine (AREA)
• Hematology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Pulmonology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Support Of The Bearing (AREA)
• Rolling Contact Bearings (AREA)

Applications Claiming Priority (4)

Publications (1)

Family

ID=66589544

Family Applications (3)

Family Applications Before (2)

Country Status (6)

Families Citing this family (1)

Family Cites Families (29)

• 2019
  • 2019-05-14 US US17/287,074 patent/US11781591B2/en active Active
  • 2019-05-14 CN CN201980067290.2A patent/CN112840134A/zh active Pending
  • 2019-05-14 EP EP19724797.6A patent/EP3821145A1/de active Pending
  • 2019-05-14 WO PCT/EP2019/062391 patent/WO2020104073A1/de unknown
  • 2019-05-14 EP EP19725310.7A patent/EP3833875B1/de active Active
  • 2019-05-14 WO PCT/EP2019/062392 patent/WO2020104074A1/de unknown
  • 2019-05-14 KR KR1020217007468A patent/KR20210096066A/ko not_active Application Discontinuation
  • 2019-05-14 CN CN201980067271.XA patent/CN112867868B/zh active Active
  • 2019-05-14 CN CN201980067766.2A patent/CN112867869B/zh active Active
  • 2019-05-14 US US17/282,844 patent/US20210348647A1/en not_active Abandoned
  • 2019-05-14 DE DE202019102714.2U patent/DE202019102714U1/de active Active
  • 2019-05-14 EP EP19725309.9A patent/EP3824188A1/de not_active Withdrawn
  • 2019-05-14 WO PCT/EP2019/062393 patent/WO2020104075A1/de unknown
  • 2019-05-14 KR KR1020217007743A patent/KR20210093230A/ko not_active Application Discontinuation
  • 2019-07-25 CN CN201921182496.3U patent/CN210660710U/zh active Active
  • 2019-07-25 CN CN201921180219.9U patent/CN210660659U/zh active Active
  • 2019-07-25 CN CN201921182298.7U patent/CN210565190U/zh active Active

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