EP3521634B1 - Axiallüfter mit spitzenführung - Google Patents

Axiallüfter mit spitzenführung Download PDF

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Publication number
EP3521634B1
EP3521634B1 EP19154456.8A EP19154456A EP3521634B1 EP 3521634 B1 EP3521634 B1 EP 3521634B1 EP 19154456 A EP19154456 A EP 19154456A EP 3521634 B1 EP3521634 B1 EP 3521634B1
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EP
European Patent Office
Prior art keywords
fan
hub
axial flow
fan blades
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19154456.8A
Other languages
English (en)
French (fr)
Other versions
EP3521634A1 (de
Inventor
Ryan K. Dygert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
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Filing date
Publication date
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Publication of EP3521634A1 publication Critical patent/EP3521634A1/de
Application granted granted Critical
Publication of EP3521634B1 publication Critical patent/EP3521634B1/de
Active legal-status Critical Current
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Classifications

    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • A47F3/0447—Cases or cabinets of the open type with forced air circulation with air curtains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F01D5/142—Shape, i.e. outer, aerodynamic form of the blades of successive rotor or stator blade-rows
    • F01D5/143—Contour of the outer or inner working fluid flow path wall, i.e. shroud or hub contour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/20—Specially-shaped blade tips to seal space between tips and stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0404—Cases or cabinets of the closed type
    • A47F3/0408—Cases or cabinets of the closed type with forced air circulation
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • F04D29/547—Ducts having a special shape in order to influence fluid flow
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/10—Stators
    • F05B2240/11—Shroud seal segments
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/307—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the tip of a rotor blade

Definitions

  • the present invention relates to an axial flow fan.
  • the axial flow fan may be for use in a refrigerated display merchandiser where food and/or beverages are displayed.
  • supermarkets and convenient stores are equipped with display cases or merchandisers, which may be open or provided with doors, for presenting fresh food or beverages to customers, while maintaining the fresh food and beverages in a refrigerated environment.
  • the refrigeration systems of such merchandisers commonly employ a conventional refrigeration cycle and include an evaporator and evaporator fan operatively associated with the refrigerated interior of the cabinet, as well as a condenser, a condenser fan, and compressor.
  • a refrigerant is circulated by a compressor through refrigerant lines connecting the compressor, the condenser, and the evaporator in a conventional manner to form a closed circuit.
  • cold, moisture-bearing air is provided to the product display zone of the display case by passing air over the heat exchange surface of the evaporator.
  • heat is absorbed from the air passing over the evaporator so as to lower the temperature of the air.
  • the path of the air provided to the evaporator fan is torturous and includes multiple 90 degree turns and downstream obstructions. Accordingly, integration of axial fan without affecting both performance and noise of the merchandiser can be challenging.
  • the invention provides an axial flow fan including a generally hollow casing defining an inlet end and an outlet end of the axial flow fan. A diameter of the casing increases from the inlet end to the outlet end.
  • An impeller is rotatably mounted within the casing. The impeller includes a hub and a plurality of fan blades extending from a root located at the hub to a blade tip.
  • An outer diameter of the hub increases from the inlet end to the outlet end, wherein the increase in the diameter of the hub from the inlet end to the outlet end is generally equal to the increase in the diameter of the casing from the inlet end to the outlet end.
  • a diameter of the blade tip of each of the plurality of fan blades increases from the inlet end to the outlet end.
  • a tip fence is located at the blade tip of at least one of the plurality of fan blades and an axial length of the tip fence measured perpendicular to the fan blades is greater than a thickness of the at least one of the plurality of fan blades.
  • An axial clearance, measured parallel to the diameter of the casing, is defined between the tip fence of each of the plurality of fan blades and an adjacent surface of the casing and the axial clearance remains constant between the inlet end and the outlet end of the axial flow fan with a tolerance of +/- 1mm.
  • the hub has a radially stepped configuration extending in the circumferential direction.
  • a ratio of the axial length of the tip fence to the thickness of the at least one of the plurality of fan blades is between 2 and 10.
  • the tip fence has a generally constant thickness, or alternatively a thickness of the tip fence varies.
  • each of the plurality of fan blades includes a first surface and a second, opposite surface, and the tip fence extends beyond both the first surface and the second surface of the at least one of the plurality of fan blades.
  • the tip fence extends beyond at least one of the leading edge and the trailing edge of the at least one of the plurality of fan blades.
  • the tip fence is integrally formed with the at least one of the plurality of fan blades.
  • the casing has a bellmouth contour.
  • the casing further comprises a stationary hub oriented in alignment with the hub and a plurality of structural members extending radially outward from the stationary hub to couple the casing to the stationary hub.
  • At least one of the stationary hub and the plurality of structural members has one or more openings to allow an airflow to pass there through.
  • the axial flow fan is mounted in a refrigerated display cabinet.
  • the hub and the plurality of fan blades are formed separately, or alternatively the hub and the plurality of fan blades are integrally formed.
  • the invention provides, a refrigerated merchandiser including an axial flow fan as discussed above.
  • the refrigerated merchandiser includes a cabinet defining a product display area and having a compartment separate from the product display area.
  • An air circulation circuit fluidly couples the compartment and the product display area and the axial flow fan is an air circulating fan for moving a flow of air axially through the air circulation circuit.
  • the impeller is a fan rotor rotatably mounted within the casing and having the hub and the plurality of fan blades extending from a root located at the hub to a blade tip.
  • a diameter of the blade tip of each of the plurality of fan blades increases along an axial length of the air circulating fan.
  • An axial length of the tip fence is greater than a thickness of the at least one of the plurality of fan blades.
  • a ratio of the axial length of the tip fence to the thickness of the at least one of the plurality of fan blades is between 2 and 10.
  • a fan assembly 20 utilized, for example in a heating, ventilation and air conditioning (HVAC) system to draw air over an evaporator is illustrated.
  • HVAC heating, ventilation and air conditioning
  • the fan assembly 20 is an axial flow fan; however, it should be understood that other suitable types of fans, such as a mixed flow fan for example, are also within the scope of the disclosure.
  • the fan assembly 20 includes a fan rotor or impeller 22 including a plurality of fan blades 24.
  • the plurality of fan blades 24 is generally equidistantly spaced about an outer periphery of a rotor hub 26 and extends radially outwardly from the hub 26 into an opening 28 defined between the hub 26 and an outer casing 30. As shown, the radially outer end 32 of each of the fan blades 24 is separate. Accordingly, the fan rotor 22 does not include a fan shroud.
  • the fan blades 24 may be separate components coupled to the hub 26, or alternatively, the blades 24 and hub 26 may be integrally formed, such as from an injection molded plastic for example.
  • the motor 34 may be oriented such that an axis of rotation of the motor 34 is arranged generally parallel to or coaxial with the fan axis X.
  • the fan assembly 20 includes a stationary hub 36 arranged adjacent the rotor hub 26 and connected to the casing 30 via one or more structural members 38. As shown, the structural members 38 may be generally hollow to minimize interference with the airflow A.
  • the motor 34 may be affixed to the stationary hub 36 at the inlet 40 of the fan assembly 20.
  • the fan rotor 22 is rotated at relatively high speeds to induce the flow of air A through the casing 30, and in the process it creates a swirl in the direction of the fan rotation, such that the air A may have both an axial component and a tangential component.
  • the casing 30 is formed having a bellmouth contour extending towards the outlet end 42 thereof.
  • the inner diameter of the casing 30, generally increases from the inlet end 40 of the fan assembly 20 to the outlet end 42 of the fan assembly 20.
  • the bellmouth contour of the casing 30 diffuses the radial flow at the outlet 42 of the fan assembly 20 to facilitate turning of the airflow A.
  • the outer diameter of the rotor hub 26 may gradually increase along the path of the airflow A through the fan assembly 20.
  • the increase in the diameter of the rotor hub 26 is generally equal to the increase in the inner diameter of the casing 30 such that the width of the opening 28 defined between the rotor hub 26 and the casing 30 remains generally constant between the inlet end 40 and the outlet end 42 of the fan assembly 20.
  • the clearance between the rotor hub 26 and the casing 30 includes a tolerance of +/- 1mm.
  • the hub 26 has a radially stepped configuration extending in the circumferential direction. Inclusion of the radial steps eliminates the need for undercuts in the associated production tooling that would otherwise form on the downstream surfaces of the blades. This reduces tooling complexity without sacrificing airflow performance benefit.
  • the fan rotor 22 may include any number of fan blades 24. In the illustrated example, the rotor 22 includes seven fan blades 24. However, it should be understood that a fan assembly 20 having any configuration including two or more blades 24 is contemplated herein.
  • the plurality of fan blades 24 may be, but need not be substantially identical.
  • each fan blade 24 has a root 44 where the fan blade 24 attaches to the hub 26 and a tip 32 at the outer extremity of the blade 24, opposite the root 44.
  • Each blade 24 additionally has a leading edge 46 located upstream with respect to a direction of rotation and a trailing edge 48 location downstream with respect to the direction of rotation. The leading and trailing edges 46, 48 are joined together at the root 44 and the tip 32.
  • the fan blades 24 have a sweep, for example in the direction opposite the direction of fan rotation X, referred to as reverse or backward sweep.
  • fan blades 24 having a sweep in the direction of the fan rotation also referred to as forward sweep
  • fan blades 24 having no sweep such that the tips 32 of the fan blades 24 are arranged generally within a plane are also contemplated herein.
  • the "span" of the fan blade 24 as referred to herein is intended to describe the distance between the root 44 and the tip 32.
  • the span varies along each of the fan blades 24, such as between a leading and trailing edge 46, 48 for example.
  • the fan blades 24 may include a radially expanding tip 32. Accordingly, the span of the fan blade 24 generally increases from adjacent a first edge, such as the leading edge 46 for example, to a second, opposite edge, such as the trailing edge 48 for example.
  • the distance between the inner surface 50 of the casing 30 and a first portion of a fan blade 24 is greater than the distance between the inner surface 50 of the casing 30 and a second portion of the fan blade 24.
  • arrangements where the span of the fan blade 24 gradually increases from the trailing edge 48 to the leading edge 46 and embodiments where the span changes over only a portion of the fan blade 24 are also contemplated herein.
  • each fan blade 24 Disposed at the tip 32 of each fan blade 24 is a fence 52.
  • the tip fence 52 may be removably coupled to the fan blade 24, or alternatively, may be integrally formed therewith. Where the tip fence 52 is integrally formed with the blade 24, the fan rotor 22 may be formed by a straight-pull injection molding process, or through an additive manufacturing process.
  • Each tip fence 52 may span the entire peripheral length of the tip 32, or alternatively, may extend over only a portion of the periphery of the fan blade 24. In the illustrated example, the tip fence 52 extends forward of the leading edge 46 of the fan blade 24 but is truncated adjacent the trailing edge 48 of the fan blade 24. However, configurations where the tip fence 52 does not extend to the leading edge 46 and/or extends beyond the trailing edge 48 are also possible.
  • the tip fence 52 extends generally perpendicular to the body of the fan blade 24 and has an axial length greater than the thickness of the fan blade 24.
  • the axial length of the tip fence 52 may be at least double and up to about 5 times, or about 10 times the thickness of the fan blade 24.
  • the tip fence 52 may have a generally constant thickness, or alternatively, may gradually decrease in thickness away from the fan blade 24.
  • the tip fence 52 generally extends beyond at least one of a first surface 54 and a second, opposite surface 56 of the fan blade 24. In the illustrated example, the tip fence 52 extends axially beyond both the first surface 54 and the second surface 56 to form a partial shroud for a corresponding fan blade 24.
  • the tip fence 52 manages the clearance gap leakage flow across the blade tip 32 and reduces sensitivity to inflow distortion, thereby reducing noise.
  • the clearance between the rotor hub 26 and an adjacent surface of the casing 30 is generally constant within a nominal tolerance of +/- 1mm. This clearance is defined between the tip fence 52 of each fan blade 24 and the casing 30.
  • the refrigerated display merchandiser 100 includes an outer cabinet 102 and an inner cabinet liner 104 that defines within its bounds a product display region 106.
  • the product display region 106 may be open, as shown in the FIG., or enclosed.
  • Refrigerated goods 108 may be stored on shelves 110, which are mounted in a known manner within the product display region 106.
  • Several orifices 112 may direct cool air from a back wall 114 into the product display region 106. The air is configured to cool the display space 106 and refrigerate the products 108 contained therein.
  • the refrigerated display merchandiser 100 houses one or more components associated with a vapor-refrigeration cycle.
  • an evaporator 120 may be disposed within the merchandiser 100, in a compartment 122 separate from the product display area 106.
  • the compartment 122 is illustrated as being located below the product display area 106, systems where the compartment 122 is located behind or above the product display area 106 are also possible.
  • Cool air passing over the evaporator 120 is circulated by an air circulation mechanism 124, such as fan assembly 20 for example, into the product display region 106 through the air flow passages defined by the orifices 112 formed in the wall 114 of the cabinet 100 into the product display area 106 to maintain the products 108 located therein a desired temperature.
  • the air circulation mechanism 124 is mounted between the outer cabinet 102 and the inner cabinet liner 104 such that the air flow provided to the mechanism 124 has a tortuous path including multiple 90 degree turns.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Claims (11)

  1. Axiallüfter, umfassend:
    ein im Allgemeinen hohles Gehäuse (30), das ein Einlassende (40) und ein Auslassende (42) des Axiallüfters definiert, wobei ein Durchmesser des Gehäuses vom Einlassende zum Auslassende zunimmt;
    ein Flügelrad (22), das drehend in dem Gehäuse angebracht ist, wobei das Flügelrad umfasst:
    eine Nabe (26), wobei ein Außendurchmesser der Nabe (26) vom Einlassende (40) zum Auslassende (42) zunimmt, und wobei die Zunahme des Durchmessers der Nabe (26) vom Einlassende (40) zum Auslassende (42) im Allgemeinen gleich der Zunahme des Durchmessers des Gehäuses (30) vom Einlassende zum Auslassende ist, und wobei die Nabe (26) eine radial abgestufte Konfiguration aufweist, die sich in der Umfangsrichtung erstreckt;
    eine Vielzahl von Lüfterschaufeln (24), die sich von einem Ansatz (44) an der Nabe zu einer Schaufelspitze (32) erstrecken, wobei ein Durchmesser der Schaufelspitze einer jeden der Vielzahl von Lüfterschaufeln vom Einlassende zum Auslassende zunimmt; und
    eine Spitzenführung (52), die sich an der Schaufelspitze von mindestens einer aus der Vielzahl von Lüfterschaufeln befinden, wobei eine axiale Länge der Spitzenführung, senkrecht zu den Lüfterschaufeln gemessen, größer als eine Dicke der mindestens einen aus der Vielzahl von Lüfterschaufeln ist;
    wobei ein axialer Spielraum (28), parallel zum Durchmesser des Gehäuses (30) gemessen, zwischen der Spitzenführung (52) einer jeden aus der Vielzahl von Lüfterschaufeln (24) und einer benachbarten Oberfläche des Gehäuses definiert wird, und der axiale Spielraum zwischen dem Einlassende (40) und dem Auslassende (42) des Axiallüfters, mit einer Toleranz von +/- 1mm, konstant bleibt.
  2. Axiallüfter nach Anspruch 1,
    wobei ein Verhältnis der axialen Länge der Spitzenführung (52) zur Dicke der mindestens einen aus der Vielzahl von Lüfterschaufeln (24) zwischen 2 und 10 liegt.
  3. Axiallüfter nach Anspruch 1 oder 2,
    wobei die Spitzenführung (52) eine im Allgemeinen konstante Dicke aufweist.
  4. Axiallüfter nach einem von Anspruch 1 oder 2,
    wobei eine Dicke der Spitzenführung (52) variiert.
  5. Axiallüfter nach einem vorstehenden Anspruch, wobei jede aus der Vielzahl von Lüfterschaufeln (24) eine erste Oberfläche und eine zweite, gegenüberliegende Oberfläche umfasst, und sich die Spitzenführung (52) über beide, die erste Oberfläche und die zweite Oberfläche der mindestens einen aus der Vielzahl von Lüfterschaufeln hinaus erstreckt.
  6. Axiallüfter nach einem vorstehenden Anspruch, wobei jede aus der Vielzahl von Lüfterschaufeln (24) eine Vorderkante (46) und eine Hinterkante (48) aufweist, und
    sich die Spitzenführung (52) über mindestens eine von der Vorderkante (46) und der Hinterkante (48) der mindestens einen aus der Vielzahl von Lüfterschaufeln hinaus erstreckt.
  7. Axiallüfter nach einem vorstehenden Anspruch, wobei die Spitzenführung (52) in einem Stück mit der mindestens einen aus der Vielzahl von Lütfterschaufeln (24) gebildet ist.
  8. Axiallüfter nach einem vorstehenden Anspruch, wobei das Gehäuse (30) eine Einlauftrichterkontur aufweist.
  9. Axiallüfter nach einem vorstehenden Anspruch, wobei das Gehäuse (30) weiter umfasst:
    eine stationäre Nabe (36), die in einer Linie mit der Nabe (26) ausgerichtet ist; und
    eine Vielzahl von Strukturelementen (38), die sich radial von der stationären Nabe nach außen erstreckt, um das Gehäuse mit der stationären Nabe zu koppeln; und wobei optional
    mindestens eines von der stationären Nabe und der Vielzahl von Strukturelementen eine oder mehrere Öffnungen aufweist, um zu ermöglichen, dass ein Luftstrom dort hindurchführt.
  10. Axiallüfter nach einem vorstehenden Anspruch, wobei die Nabe (26) und die Vielzahl von Lüfterschaufeln (24) getrennt gebildet sind, oder wobei die Nabe und die Vielzahl von Lüfterschaufeln in einem Stück gebildet sind.
  11. Gekühltes Verkaufsmöbel, umfassend einen Axiallüfter nach einem vorstehenden Anspruch, wobei das gekühlte Verkaufsmöbel weiter umfasst:
    einen Schrank (102), der einen Produktpräsentationsbereich (106) definiert und ein Fach (122) aufweist, das von dem Produktpräsentationsbereich getrennt ist; und
    einen Luftzirkulationskreis (124, 112), der das Fach und den Produktpräsentationsbereich fluidtechnisch koppelt;
    wobei der Axiallüfter ein Umwälzlüfter zum Bewegen eines Luftstroms axial durch den Luftzirkulationskreis hindurch ist.
EP19154456.8A 2018-01-31 2019-01-30 Axiallüfter mit spitzenführung Active EP3521634B1 (de)

Applications Claiming Priority (1)

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US201862624483P 2018-01-31 2018-01-31

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EP3521634A1 EP3521634A1 (de) 2019-08-07
EP3521634B1 true EP3521634B1 (de) 2023-03-01

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USD910834S1 (en) * 2018-12-05 2021-02-16 Asia Vital Components Co., Ltd. Impeller for a fan
EP3821768B1 (de) 2019-11-14 2023-12-27 Carrier Corporation Kühlvitrine mit luftstromführung
US20230263317A1 (en) * 2022-02-24 2023-08-24 Carrier Corporation Refrigereated display cabinet with mixed or cross flow fan

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US20190234419A1 (en) 2019-08-01
ES2940780T3 (es) 2023-05-11
CN110094362A (zh) 2019-08-06

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