EP0053703A2 - Kühlvorrichtung für Ventilatormotor - Google Patents

Kühlvorrichtung für Ventilatormotor Download PDF

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Publication number
EP0053703A2
EP0053703A2 EP81108910A EP81108910A EP0053703A2 EP 0053703 A2 EP0053703 A2 EP 0053703A2 EP 81108910 A EP81108910 A EP 81108910A EP 81108910 A EP81108910 A EP 81108910A EP 0053703 A2 EP0053703 A2 EP 0053703A2
Authority
EP
European Patent Office
Prior art keywords
impeller
motor
cooling
blower motor
vent stack
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.)
Withdrawn
Application number
EP81108910A
Other languages
English (en)
French (fr)
Other versions
EP0053703A3 (de
Inventor
John C. Connell
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honeywell Inc filed Critical Honeywell Inc
Publication of EP0053703A2 publication Critical patent/EP0053703A2/de
Publication of EP0053703A3 publication Critical patent/EP0053703A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using 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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the present invention relates to an electric blower motor cooling arrangement according to the preamble of claim 1.
  • blower in the vent stack of a furnace to induce a draft for moving the products of combustion from the combustion chamber to the atmosphere.
  • this type of induced draft furnace had the blower mounted in the heating system or furnace vent stack and the blower was operated by a conventional shaft and bearing connected to the motor that was mounted external to the stack. With the electric motor mounted external to the stack, the motor derived its basic cooling from the ambient air through the use of supplementary cooling fans driven by the motor.
  • This known type of an arrangement occupied a great deal of space for clearance around the cooling fans and consumes additional power.
  • the present invention provides for mounting an electric blower motor through the vent stack itself to operate an associated impeller means to move the combustion products in the vent stack.
  • the motor is designed with cooling air passage means through the motor.
  • the mounting,motor, and impeller means are designed to create a negative pressure differential across the cooling air passage means to draw cooling air trough the motor structure to cool the motor and then exhaust this air into the furnace vent stack along with the products of combustion.
  • This structure allows for a positive cooling function for the motor and its bearings, along with the ability to provide a trim profile for the furnace vent structure.
  • Figure 1 discloses a pictorial representation of a cnn- ventional heating system or furnace 10 having a furnace vent stack 11 mounted through the tnp 12 of the furnace 10.
  • the furnace 10 has a vestibule 13 in which are placed conventional appendages and controls for the furnace.
  • various parts of the fuel and control system for a furnace 10 as exemplified by the showing of a control transformer 14, a gas valve 15, a gas inlet pipe 16, and a gas pipe 17 to a burner (not shown) which is internal to the furnace 10.
  • a heat exchanger Internal to the furnace 10 and not shown is a heat exchanger which operates with the burner fed from the gas pipe 17.
  • control equipment including the transformer 14 and the gas valve 15 along with all of the control circuitry are conventional in a gas fired furnace. While a gas fired heating system has been specifically disclosed in Figure 1 it should be understood that any type of heating system or furnace that is operated with an induced draft condition can be used.
  • the furnace 10 is equipped with an induced draft blower means 20 that is disclosed as mounted in the vestibule 13 of the furnace 10.
  • the induced draft blower 20 is energized by conductors 21 and 22 from control equipment (not shown) in a conventional fashion.
  • the induced draft blower 20 includes a blower motor 24 that is central to the present invention. Its details will be provided after a general description of the operation of an induced draft blower type of furnace 10 is completed.
  • the - tor 24 operates a blower or impeller means 31 ( Figures 2 and 3) within the induced draft blower 20 that draws the flue gases from the combustion chamber and the internal heat exchanger within the furnace 10. The flue gases are then forced out of the stack 11 as indicated by the arrow 25.
  • the operation of the motor 24 draws combustion air into the combustion chamber of the furnace 10 where it is efficiently burned to supply heat to the heat exchanger. Tne flue gases are then positively forced up the stack 11 rather than relying on gravity as in conventional furnaces. Also moved up the stack 11 is some cooling air which has been schematically represented at 26.
  • the cooling air 26 is drawn through the motor 24 into the blower means 20 and is combined with the flue gases. The combination of the flue gases and the cooling air 26 is forced up the stack 11 and provides for a positive means of cooling the blower motor 24 as will be described in detail in connection with Figures 2 and 3.
  • the vestibule 13 of the furnace 10 has been disclosed having an opening 30 that communicates with the combustion chamber.
  • an impeller means 31 of a centrifugal or squirrel cage type of blower.
  • blower or impeller blades are disclosed, and the structure of the squirrel cage blower 31 is of a conventional design at least as to the portion 32.
  • the blower means 31 further has an impeller backplate 33 that has a raised portion 34 which includes a plurality of holes 35, the purpose of which will be described later.
  • the raised portion 34 of the backplate 33 is used to partially enclose the motor 24 in a protective manner from the inside of the stack 11.
  • the motor 24 has a central shaft 23 that is disclosed as being hollow to form an air passage between the outside ambient air in the vestibule 13, and the interior of the stack 11.
  • the motor 24 further has cooling air passage means generally disclosed at 27 through which cooling air 26 is drawn.
  • the hollow shaft 23 forms part of the cooling air passage means.
  • the cooling air drawn through the cooling air passage means 27 can flow through the holes 35 in the impeller backplate 33 as well as being drawn through the center opening of the motor shaft 23.
  • the blower housing 20 further has an end member 40 or a housing backplate that forms one side of the blower. This can best be seen in Figure 1. There is a small space 29 between the housing backplate 40 and the impeller backplate 33 that forms a further air passage for the air flow disclosed at 26.
  • the mounting of the motor 24 into a hole or opening in the vent stack 11 reduces the silhouette of the structure and further allows for the development of well defined cooling air passage means to allow cooling air to be drawn through the motor to keep the motor and its bearing structure within an acceptable operating range.
  • the air 26 that is used for cooling is drawn from the ambient air into the stack 11 wnere it is mixed with the flue gases and this mixture is then expelled through the stack 11 as indicated at 25. By creating a pressure drop across the openings from ambient air to the interior of the stack 11 a safe operating mode that allows for positive cooling of the blower motor 24 is created.
  • FIG 3 an isometric view of part of the structure in detail has been discloses. Tne difference between Figure 3 and Figure 2 is that the shaft 23 is shown as a solid shaft as opposed to a hollow shaft and vent holes 35 are not shown. In Figure 3 the shaft 23 is disclosed passing into motor coils 24' that are placed in'a motor means 24. The cooling entering the motor means 24 has been again designated at 26 as a number of phantom lines.
  • the blower structure 20 has been disclosed viewed from inside of the furnace 10, and it becomes apparent that the blower 20 is a squirrel cage type of blower having the impeller backplate 33 but in the version disclosed in Figure 3 the holes 35 have not been provided as all of the air passes in space 29 between the housing backplate 40 and the impeller backplate 33.
  • the structure disclosed in Figure 3 has generally the same reference numerals as that disclosed in Figure 2, and a further description is believed unnecessary.
  • the operation of the impeller means 31 causes air to be driven by the impeller means 31 up the stack 11 as indicated at 25.
  • the rotation of the impeller means 31 creates a pressure drop that draws the cooling air 26 through the motor 25 and exhausts the cooling air 26 in the space 29 between the impeller backplate 33 and the housing backplate 40 where the air mixes with the products of combustion.
  • the exact structure for implementing the present invention is not limited to the specific structural details disclosed by the applicant.
  • the invention is broadly directed to the principle of drawing cooling air through a blower motor that has cooling air passage means that extend from the normal ambient surrounding to the interior of a vent stack of a furnace.
  • the operation of the blower within the vent stack creates a pressure drop that draws cooling air through the cooling air passage means to cool the motor and then mixes this air with the products of combustion from the furnace where they are in turn expelled in the furnace vent stack.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP81108910A 1980-12-05 1981-10-26 Kühlvorrichtung für Ventilatormotor Withdrawn EP0053703A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21326080A 1980-12-05 1980-12-05
US213260 1980-12-05

Publications (2)

Publication Number Publication Date
EP0053703A2 true EP0053703A2 (de) 1982-06-16
EP0053703A3 EP0053703A3 (de) 1982-09-15

Family

ID=22794376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108910A Withdrawn EP0053703A3 (de) 1980-12-05 1981-10-26 Kühlvorrichtung für Ventilatormotor

Country Status (2)

Country Link
EP (1) EP0053703A3 (de)
JP (1) JPS57122647A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172981A (en) * 1985-03-29 1986-10-01 Christopher John Kershaw Improvements in or relating to chimney flues
EP0191644A3 (de) * 1985-02-14 1987-08-26 A.O. Smith Corporation Tauchkammerwassererhitzer
US5070772A (en) * 1990-03-15 1991-12-10 Heico, Inc. Venter
US5375651A (en) * 1991-04-03 1994-12-27 Magnetek Universal Electric Draft inducer blower motor mounting and cooling construction
FR2859579A1 (fr) * 2003-09-10 2005-03-11 Valeo Climatisation Dispositif pour le support d'un moteur electrique entrainant une turbine, en particulier pour un appareil de chauffage, ventilation et/ou climatisation de vehicule automobile
EP2594847A1 (de) 2011-11-18 2013-05-22 exodraft a/s Motorbetriebenes Kaminentwurfssystem und Antrieb zur Verwendung in dem System
FR3012540A1 (fr) * 2013-10-24 2015-05-01 Soler & Palau Res Sl Dispositif de refroidissement du moteur d'un ventilateur
WO2016039890A3 (en) * 2014-09-09 2016-05-19 Twin City Fan Companies, Ltd. Motor cooling device and method
FR3047524A1 (fr) * 2016-02-09 2017-08-11 Atlantic Climatisation & Ventilation Dispositif de ventilation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2209410A5 (de) * 1972-11-03 1974-06-28 Technicair Sa
FR2410155A1 (fr) * 1977-11-24 1979-06-22 Noirats Sarl Usine Caisson d'extraction de gaz a temperatures elevees
SE443408B (sv) * 1979-09-28 1986-02-24 Sueddeutsche Kuehler Behr Radialflekt for verme- eller luftkonditioneringsanleggningar i fordon

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0191644A3 (de) * 1985-02-14 1987-08-26 A.O. Smith Corporation Tauchkammerwassererhitzer
GB2172981A (en) * 1985-03-29 1986-10-01 Christopher John Kershaw Improvements in or relating to chimney flues
US5070772A (en) * 1990-03-15 1991-12-10 Heico, Inc. Venter
US5375651A (en) * 1991-04-03 1994-12-27 Magnetek Universal Electric Draft inducer blower motor mounting and cooling construction
FR2859579A1 (fr) * 2003-09-10 2005-03-11 Valeo Climatisation Dispositif pour le support d'un moteur electrique entrainant une turbine, en particulier pour un appareil de chauffage, ventilation et/ou climatisation de vehicule automobile
EP1515416A1 (de) * 2003-09-10 2005-03-16 Valeo Climatisation Halteeinrichtung für einen ein Lüfterrad antreibenden elektrischen Motor, insbesonders für ein Heizungs-,Lüftungs- und/oder Klimagerät eines Kraftfahrzeuges
EP2594847A1 (de) 2011-11-18 2013-05-22 exodraft a/s Motorbetriebenes Kaminentwurfssystem und Antrieb zur Verwendung in dem System
US9599339B2 (en) 2011-11-18 2017-03-21 Exodraft a/s Motor-driven chimney draft system and an impeller for use in the system
FR3012540A1 (fr) * 2013-10-24 2015-05-01 Soler & Palau Res Sl Dispositif de refroidissement du moteur d'un ventilateur
WO2016039890A3 (en) * 2014-09-09 2016-05-19 Twin City Fan Companies, Ltd. Motor cooling device and method
US11209006B2 (en) 2014-09-09 2021-12-28 Twin City Fan Companies, Ltd. Motor cooling device and method
FR3047524A1 (fr) * 2016-02-09 2017-08-11 Atlantic Climatisation & Ventilation Dispositif de ventilation

Also Published As

Publication number Publication date
JPS57122647A (en) 1982-07-30
EP0053703A3 (de) 1982-09-15

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Inventor name: CONNELL, JOHN C.