GB2151704A - Housings for suction fans - Google Patents

Housings for suction fans Download PDF

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Publication number
GB2151704A
GB2151704A GB08333932A GB8333932A GB2151704A GB 2151704 A GB2151704 A GB 2151704A GB 08333932 A GB08333932 A GB 08333932A GB 8333932 A GB8333932 A GB 8333932A GB 2151704 A GB2151704 A GB 2151704A
Authority
GB
United Kingdom
Prior art keywords
fan
housing
air
motor
liquid
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.)
Granted
Application number
GB08333932A
Other versions
GB2151704B (en
GB8333932D0 (en
Inventor
John Richard Axon
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.)
AXON ARMATURE MANUFACTURING CO
Original Assignee
AXON ARMATURE MANUFACTURING CO
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 AXON ARMATURE MANUFACTURING CO filed Critical AXON ARMATURE MANUFACTURING CO
Priority to GB08333932A priority Critical patent/GB2151704B/en
Publication of GB8333932D0 publication Critical patent/GB8333932D0/en
Publication of GB2151704A publication Critical patent/GB2151704A/en
Application granted granted Critical
Publication of GB2151704B publication Critical patent/GB2151704B/en
Expired 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
    • F04D29/40—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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The housing, for use in vacuum cleaning equipment in which a fan draws up air and entrained liquid, includes a housing member 15 with a central opening 17 for a fan shaft 16. The housing member defines an outer annular chamber 22 formed with a circular row of outlet openings 24 for the air and any entrained liquid. A further housing portion 25, 28 contains the fan blades 18, 19 and has an inlet opening 31 for the air and liquid which communicates with the outlet openings 24. The housing member 15 is a metal casting which also acts as an end member for the fan motor housing. The other housing portion 25, 28 is formed as a metal pressing or pressings. <IMAGE>

Description

SPECIFICATION Fan housing This invention relates to fan housings and in particu largo fan housings for use in cleaning equipment incorporating a fan for drawing in air and entrained liquid.
Hitherto fan housings for cleaners arranged to pick up liquid, normally water with added cleaning agent, have included pressed metal elements surrounding the outer ends of the fan blades and such elements have included circumferentially-spaced outlet apertures through which the air and liquid are discharged radially from the housing.
It is an object of the invention to provide an improved fan housing for such equipment.
According to the invention a fan housing includes a generally circular housing member having a central opening for receiving and locating a fan shaft, the housing member defining a generally annular chamber towards the radially outer part of the member and around said central opening, the annular chamber having a plurality of circumferential outlet openings through which the fan discharges air and any entrained liquid, the housing further comprising a generally cylindrical housing element having an inlet opening for the air and any entrained liquid, the cylindrical element defining a space for the fan blades and being arranged to surround the outer ends of said blades, and the chamber and said space communicating for the passage of the air and entrained liquid between said inlet and outlet openings.
Preferably the circular housing member is formed as a metal forging and is directly incorporated as part of a fan motor housing.
Conveniently the outlet openings are formed as slots extending parallel to the fan axis and circum ferentially spaced about the outer side of the chamber.
Further features of the invention will appear from the following description of an embodiment of the invention given by way of example only and with reference to the drawing which is a partial section through a fan and associated fan housing.
Referring to the drawings a fan and fan housing is shown suitable for use in cleaning apparatus of the kind in which liquid, i.e. water incorporating cleaning agent, is applied to the surface to be cleaned and a suction fan draws the liquid and dirt off the surface.
This action results in a stream of air with entrained liquid and dirt being drawn along ducting towards the suction fan and it is necessary to separate out the liquid and dirt from the air before discharge of the air to atmosphere. In practice the liquid is collected in a tank.
The illustrated fan and fan housing is particularly adapted for such cleaning apparatus but may find other applications, especially in cases where water is present in air and such water must be kept away from the fan motor and the electrical supply associated with the fan motor.
The fan 10 is driven by an electric motor 11 having at one end an end housing member 12 in which is located the motor commutator 13 and brushes (not shown) associated with the commutator.
Acentral motor housing portion 14 is generaliy cylindrical and mounted on the member 12 and on the portion 14 is a further motor housing member 15 at the opposite end of the motor to the member 12.
The motor 11 has an output shaft 16 extending sealingly through a central opening 17 in the housing member 15. The shaft 16 carries rotating bladed fan members 18 and 19 constituting a suction fan for the associated cleaning apparatus (not shown).
The motor housing member 15 is formed as a metal casting and has a generally cylindrical outer periphery 20 formed by a cylindrical wall 21. Inwardly of the wall 21 is an annular chamber 22 located about a hub portion 23 of the member 15.
A plurality of outlet slots 24 is formed in the wall 21, the slots extending parallel to the central axis of the housing and motor and the slots being regularly spaced about the periphery 20.
A pressed metal member 25 of generally circular cross-section and having a circular central opening 26 is fitted over the circular periphery 20 of the member 15 and the member 25 defines a space 27 for the fan member 18 and through which the air and entrained liquid passes before entering the annular chamber 22 and discharging through the slots 24.
A further similarly-shaped pressed metal member 28 is fitted over the member 25 and the member 28 defines a further generally cylindrical space 29 in which the fan member 19 and static blade members 30 by which the air and entrained gluid is drawn from ducting (not shown), through an axial opening 31 at one end of the assembly, through the space 29 and into the space 27. It will be seen that by this arrangement the members 25 and 28 are simple pressings (or plastics mouidings) and the housing member 15 ensures that the passage of air and entrained fluid is completely separated from the fan motor 11 and the outlet slots 24 are readily formed in the member 15 without any separate cutting or machining operations being necessary.
1. Afan housing includes a generally circular housing member having a central opening for a fan shaft, the housing member defining a generally annular chamber towards the radially outer part of the member and extending around the central opening, the annular chamber having a plurality of circumferentially disposed outlet openings through which air and any entrained liquid is discharged, the housing further comprising a generally cylindrical housing portion having an inlet opening for the air and any entrained liquid, the cylindrical portion defining a space for the fan blades and being arranged to surround the outer ends of the blades, and the space and said chamber communicating for the passage of the air and entrained liquid between said inlet and outlet openings.
2. Afan housing according to claim 1 wherein the housing member is formed as a metal casting and defines a portion of a housing for a fan motor.
3. A fan housing according to claim 2 wherein
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Fan housing This invention relates to fan housings and in particu largo fan housings for use in cleaning equipment incorporating a fan for drawing in air and entrained liquid. Hitherto fan housings for cleaners arranged to pick up liquid, normally water with added cleaning agent, have included pressed metal elements surrounding the outer ends of the fan blades and such elements have included circumferentially-spaced outlet apertures through which the air and liquid are discharged radially from the housing. It is an object of the invention to provide an improved fan housing for such equipment. According to the invention a fan housing includes a generally circular housing member having a central opening for receiving and locating a fan shaft, the housing member defining a generally annular chamber towards the radially outer part of the member and around said central opening, the annular chamber having a plurality of circumferential outlet openings through which the fan discharges air and any entrained liquid, the housing further comprising a generally cylindrical housing element having an inlet opening for the air and any entrained liquid, the cylindrical element defining a space for the fan blades and being arranged to surround the outer ends of said blades, and the chamber and said space communicating for the passage of the air and entrained liquid between said inlet and outlet openings. Preferably the circular housing member is formed as a metal forging and is directly incorporated as part of a fan motor housing. Conveniently the outlet openings are formed as slots extending parallel to the fan axis and circum ferentially spaced about the outer side of the chamber. Further features of the invention will appear from the following description of an embodiment of the invention given by way of example only and with reference to the drawing which is a partial section through a fan and associated fan housing. Referring to the drawings a fan and fan housing is shown suitable for use in cleaning apparatus of the kind in which liquid, i.e. water incorporating cleaning agent, is applied to the surface to be cleaned and a suction fan draws the liquid and dirt off the surface. This action results in a stream of air with entrained liquid and dirt being drawn along ducting towards the suction fan and it is necessary to separate out the liquid and dirt from the air before discharge of the air to atmosphere. In practice the liquid is collected in a tank. The illustrated fan and fan housing is particularly adapted for such cleaning apparatus but may find other applications, especially in cases where water is present in air and such water must be kept away from the fan motor and the electrical supply associated with the fan motor. The fan 10 is driven by an electric motor 11 having at one end an end housing member 12 in which is located the motor commutator 13 and brushes (not shown) associated with the commutator. Acentral motor housing portion 14 is generaliy cylindrical and mounted on the member 12 and on the portion 14 is a further motor housing member 15 at the opposite end of the motor to the member 12. The motor 11 has an output shaft 16 extending sealingly through a central opening 17 in the housing member 15. The shaft 16 carries rotating bladed fan members 18 and 19 constituting a suction fan for the associated cleaning apparatus (not shown). The motor housing member 15 is formed as a metal casting and has a generally cylindrical outer periphery 20 formed by a cylindrical wall 21. Inwardly of the wall 21 is an annular chamber 22 located about a hub portion 23 of the member 15. A plurality of outlet slots 24 is formed in the wall 21, the slots extending parallel to the central axis of the housing and motor and the slots being regularly spaced about the periphery 20. A pressed metal member 25 of generally circular cross-section and having a circular central opening 26 is fitted over the circular periphery 20 of the member 15 and the member 25 defines a space 27 for the fan member 18 and through which the air and entrained liquid passes before entering the annular chamber 22 and discharging through the slots 24. A further similarly-shaped pressed metal member 28 is fitted over the member 25 and the member 28 defines a further generally cylindrical space 29 in which the fan member 19 and static blade members 30 by which the air and entrained gluid is drawn from ducting (not shown), through an axial opening 31 at one end of the assembly, through the space 29 and into the space 27. It will be seen that by this arrangement the members 25 and 28 are simple pressings (or plastics mouidings) and the housing member 15 ensures that the passage of air and entrained fluid is completely separated from the fan motor 11 and the outlet slots 24 are readily formed in the member 15 without any separate cutting or machining operations being necessary. CLAIMS
1. Afan housing includes a generally circular housing member having a central opening for a fan shaft, the housing member defining a generally annular chamber towards the radially outer part of the member and extending around the central opening, the annular chamber having a plurality of circumferentially disposed outlet openings through which air and any entrained liquid is discharged, the housing further comprising a generally cylindrical housing portion having an inlet opening for the air and any entrained liquid, the cylindrical portion defining a space for the fan blades and being arranged to surround the outer ends of the blades, and the space and said chamber communicating for the passage of the air and entrained liquid between said inlet and outlet openings.
2. Afan housing according to claim 1 wherein the housing member is formed as a metal casting and defines a portion of a housing for a fan motor.
3. A fan housing according to claim 2 wherein the housing member defines an end wall of the fan motor housing.
4. A fan housing according to claim 2 or 3 wherein the annular chamber extends around one end of the fan motor.
5. A fan housing according to any one of the preceding claims wherein the outlet opening in the annular chamber are formed as slots extending parallel to the axis of the housing, the slots being spaced apart about a radially outer wall of the chamber lying parallel to the axis of the housing.
6. Afan housing according to any one of the preceding claims wherein the cylindrical housing portion is formed as a metal pressing connected to the housing member about the outer wall of the annular chamber.
7. Afan housing substantially as described with reference to the drawing.
GB08333932A 1983-12-20 1983-12-20 Housings for suction fans Expired GB2151704B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08333932A GB2151704B (en) 1983-12-20 1983-12-20 Housings for suction fans

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08333932A GB2151704B (en) 1983-12-20 1983-12-20 Housings for suction fans

Publications (3)

Publication Number Publication Date
GB8333932D0 GB8333932D0 (en) 1984-02-01
GB2151704A true GB2151704A (en) 1985-07-24
GB2151704B GB2151704B (en) 1987-09-03

Family

ID=10553582

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08333932A Expired GB2151704B (en) 1983-12-20 1983-12-20 Housings for suction fans

Country Status (1)

Country Link
GB (1) GB2151704B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245315A (en) * 1990-05-12 1992-01-02 Dowty Aerospace Gloucester Cover for bladed rotor
GB2329423A (en) * 1997-09-15 1999-03-24 Hong Chen Fu In Miniature fan housing with wire strain relief
US5988995A (en) * 1997-09-17 1999-11-23 Sunonwealth Electric Machine Industry Co., Ltd. Housings for miniature fans

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB264422A (en) * 1926-09-27 1927-01-20 Gustav Oscar Lehmann Electric motor combined with a rotary air suction or compressing device
GB810909A (en) * 1956-06-13 1959-03-25 Electrolux Corp Centrifugal blowers
GB1040863A (en) * 1964-07-30 1966-09-01 Black & Decker Mfg Co Fan assembly for a vacuum cleaner
GB1420278A (en) * 1972-08-18 1976-01-07 Gen Signal Corp Motor fan device for vacuum cleaners
US3963370A (en) * 1974-10-16 1976-06-15 General Electric Company Laundry machine blower mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB264422A (en) * 1926-09-27 1927-01-20 Gustav Oscar Lehmann Electric motor combined with a rotary air suction or compressing device
GB810909A (en) * 1956-06-13 1959-03-25 Electrolux Corp Centrifugal blowers
GB1040863A (en) * 1964-07-30 1966-09-01 Black & Decker Mfg Co Fan assembly for a vacuum cleaner
GB1420278A (en) * 1972-08-18 1976-01-07 Gen Signal Corp Motor fan device for vacuum cleaners
US3963370A (en) * 1974-10-16 1976-06-15 General Electric Company Laundry machine blower mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245315A (en) * 1990-05-12 1992-01-02 Dowty Aerospace Gloucester Cover for bladed rotor
US5178000A (en) * 1990-05-12 1993-01-12 Dowty Aerospace Gloucester Limited Cover
GB2245315B (en) * 1990-05-12 1993-09-01 Dowty Aerospace Gloucester Cover
GB2329423A (en) * 1997-09-15 1999-03-24 Hong Chen Fu In Miniature fan housing with wire strain relief
US5988995A (en) * 1997-09-17 1999-11-23 Sunonwealth Electric Machine Industry Co., Ltd. Housings for miniature fans

Also Published As

Publication number Publication date
GB2151704B (en) 1987-09-03
GB8333932D0 (en) 1984-02-01

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PCNP Patent ceased through non-payment of renewal fee