EP2775147A2 - Ensemble de ventilateur à extraction à double entrée - Google Patents

Ensemble de ventilateur à extraction à double entrée Download PDF

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Publication number
EP2775147A2
EP2775147A2 EP14157921.9A EP14157921A EP2775147A2 EP 2775147 A2 EP2775147 A2 EP 2775147A2 EP 14157921 A EP14157921 A EP 14157921A EP 2775147 A2 EP2775147 A2 EP 2775147A2
Authority
EP
European Patent Office
Prior art keywords
inlet
fan
housing
fan assembly
cover plate
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
EP14157921.9A
Other languages
German (de)
English (en)
Other versions
EP2775147B1 (fr
EP2775147A3 (fr
Inventor
Colin Biggs
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.)
Nuaire Ltd
Original Assignee
Nuaire Ltd
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 Nuaire Ltd filed Critical Nuaire Ltd
Publication of EP2775147A2 publication Critical patent/EP2775147A2/fr
Publication of EP2775147A3 publication Critical patent/EP2775147A3/fr
Application granted granted Critical
Publication of EP2775147B1 publication Critical patent/EP2775147B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • 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
    • F04D29/403—Casings; Connections of working fluid 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
    • F04D29/40—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
    • F04D29/424—Double entry 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F24F7/013—Ventilation with forced flow using wall or window fans, displacing air through the wall or window
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/706—Humidity separation

Definitions

  • the present invention relates to a fan assembly, and in particular to an extract fan assembly for use in a 'wet room' environment.
  • Extract fans for use in 'wet rooms' where water is used regularly (for example kitchens and bathrooms) are prone to damage from water ingress. It is advantageous and known to mitigate water ingress by shielding the air intake of the fan. This is typically achieved by providing a shield plate across the air inlet of the fan, which is arranged to shield against water ingress while permitting air flow into the fan.
  • shield or cover plates advantageously improve the visual appearance of the fans by obscuring the inner workings from view, as well as providing acoustic attenuation to limit noise from the fan.
  • FIG. 1 shows an example of a typical fan assembly 1 of the prior art.
  • the fan assembly 1 includes a fan housing 2, a fan 4 and a shield plate 6 arranged over the inlet to the fan housing 2.
  • the shield plate 6 is spaced a distance d 1 away from the inlet.
  • the size of the clearance d 1 provided must be appropriate for the air volume flow rate handled by the fan, the type of impeller used and the impeller location within the unit housing 2. If the clearance distance d 1 is insufficient this may prevent the unit from extracting the requisite quantity of air, or necessitate fan operation at a higher speed, causing increased noise generation and power demand. Alternately, if the clearance distance d 1 is too great, the ability of the fan 4 to prevent water ingress may be severely compromised. An excessive clearance distance d 1 of the shield plate will also affect the visual appearance of the fan assembly and prove unsightly.
  • an extract fan assembly comprising a fan; a fan housing comprising a plurality of walls defining an enclosure for containing the fan having an inlet opening at one end; a cover plate positioned to cover the inlet opening and fixed relative to the housing in a spaced location from the inlet opening; a first air inlet defined by the space between the cover plate and the housing; a first airflow pathway extending between the first air inlet and the fan housing via the inlet opening.
  • the fan assembly includes a second auxiliary inlet and a second airflow pathway extending between the second air inlet and the fan housing.
  • the second air inlet allows the spacing between the cover plate and the housing to be reduced while maintaining the same inlet airflow. This enables the cover plate to better prevent the ingress of water into the fan housing by limiting the gap with the housing, as well as providing a more flush arrangement which is more visually appealing.
  • the second inlet is preferably arranged such that it is at least partially obscured from view when the fan assembly is viewed from the front.
  • the second airflow pathway may extend into the fan housing via the inlet opening. As such both airflow pathways utilise the same opening into the housing, which obviates the requirement for a secondary opening to be created, requiring less modification an existing housing design.
  • the cover plate preferably has an outwardly facing surface defining the front face of the fan assembly the second inlet is located on at least one side of the fan housing. Locating the second inlet on the side of the housing mean it is not outwardly facing and therefore obscured from view.
  • the second inlet preferably faces rearwardly in the opposing direction such that it is obscured from view when the fan assembly is viewed from the front. In use when the extract fan is installed it is viewed front-on and therefore a rearwardly facing inlet is entirely obscured from view when the fan assembly is viewed from the front.
  • the housing may include a main body section and a skirt section extending outwardly of at least one side wall of the main body with the second inlet being defined at the rear end of the skirt section between the skirt section and the main body.
  • the skirt section forms a baffle arrangement for forming the second inlet airflow pathway while also creating a visual barrier to obscure the second inlet from view.
  • the skirt section preferably includes a side wall section and a front wall section having an aperture formed therein.
  • the skirt section may be both vertically and laterally spaced from the main body section with the front wall section located between the main body section and the cover plate.
  • the first air flow pathway extends between the first inlet and the inlet opening of the fan housing via the space between the front wall section and the cover plate and via the aperture in the front wall section and the second airflow pathway extends between the second inlet and the inlet opening of the fan housing via the space between the skirt section and the main body.
  • two separate airflow pathways are created by the skirt section which both extend to the same inlet opening of the housing. Therefore, an existing housing design may be more easily adapted, potentially in a retrofit manner, to include a secondary inlet by the addition of the skirt section.
  • the first airflow into the first inlet is preferably substantially parallel with the plane of the cover panel and the second airflow into the second inlet is substantially perpendicular to the first airflow in a direction towards the cover plate.
  • the direction of the second airflow is such that the inlet is obscured from view.
  • the skirt section is preferably held in said spaced location from the main body by a plurality of support members which support the skirt section while permitting the passage of air through the second airflow pathway.
  • an extract fan housing comprising a plurality of walls defining an enclosure for containing a fan having an inlet opening at one end; a cover plate positioned to cover the inlet opening and fixed relative to the housing in a spaced location from the inlet opening; a first air inlet defined by the space between the cover plate and the housing; a first airflow pathway extending between the first air inlet and the fan housing via the inlet opening; and wherein the housing includes a second inlet and a second airflow pathway extending between the second air inlet and the fan housing.
  • a fan assembly 10 includes a fan housing 12 comprising a plurality of walls 13 and a base 15 forming an enclosure having an open outer end 17 defining a first air inlet 14 at the opposite end of the housing to the base 15.
  • the fan housing houses a fan which is arranged to draw air through the first inlet 14 into the fan housing and to expel the air via the outlet ducting 16 which extends from an aperture formed in the base 15.
  • a shield plate 18 is located in front of the first inlet 14 to shield the fan housing 12 from water ingress and to obscure the inside of the housing 12 from view.
  • the housing 12 has an outer edge 20 which is the outwardly facing edge of the housing 12 when installed.
  • the terms 'outer' and 'inner' ends are relative terms used with reference to the end of the fan assembly which is outwardly facing in use, and the opposing inner end which is at the base of the assembly.
  • the outer edge 2 surrounds and defines the inlet opening 14.
  • the shield plate 18 is supported by a plurality of spigots 22 which hold the shield plate 18 a spaced distance d 2 from the outer edge 20 of the housing 12.
  • the outer end of the housing 12 includes a peripheral frame section 24 having a width w 1 that surrounds the inlet 14.
  • the peripheral frame section 24 extends outwardly of the main body 26 of the housing which has a width w 2 , such that the frame sections 24 defines an overhang extending past the side wall of the main body 26.
  • a series of apertures 28 are formed at the inner rear end face of the frame section 24 which extend into the fan housing 12 defining an air pathway.
  • the frame section 24 overhangs the main body section 26 on two opposing side defining a skirt. However, this may be one side only where a lower airflow is required, or conversely more than two sides if increased airflow is required by the system specification.
  • the frame or skirt section 24 includes at each overhanging portion a side wall 30 which is spaced outwardly in the width wise direction from the side wall 32 of the main body 26, and a roof section 34 formed by the front wall or outer face of the frame section, with the frame section 24 being spaced from the main body section 26 in the longitudinally outwards direction and held in this spaced position by a series of support tabs 35.
  • the side wall 30 of the skirt section and the side wall 32 of the housing combine to define an airflow cavity through which the second inlet apertures 28 extend and connect with a further aperture formed at the upper edge of the main body section 26 to define a second air inlet pathway 36.
  • the second air inlet 28 is therefore arranged on the rearwardly facing side of the skirt section 24 such that it is obscured from view when viewed from the front by the side wall 30 which forms a side skirt covering and obscuring the second inlets 28, and by the front wall section 34.
  • the fan 36 is located within the fan housing 12.
  • a first airflow enters the fan housing 12 through the first inlet 14 in a direction substantially transverse to the longitudinal axis of the fan assembly via the gap defined around the sides of the fan assembly between the shield/cover plate 18 and the outer face of the frame section 24.
  • a second airflow enters the fan housing 12 through the second inlet 28 in a second direction that is substantially parallel to the longitudinal axis of the fan assembly in an outwardly facing direction.
  • the second inlet 28 provides an additional inlet area, with the fan assembly incorporating a secondary frame element 24 extending the unit facia in width and/or height.
  • the frame section 24 allows air to enter at its rear face, between the frame section and the main body of the housing, from whence it enters the unit housing via a secondary inlet aperture.
  • the frame arrangement is such that the secondary inlet aperture is concealed from the room occupants and also protected from adverse water ingress.
  • the dimensions of the first 14 and second 36 inlets are calculated so as to allow the required additional flow rate thus reducing the resistance against which the fan operates. In this way the front plate spacing may be maintained at the optimum position for its protective functions previously described.
  • the position and aspect ratio of these apertures is calculated so as to provide the optimum flow pattern into the fan inlet orifice.
  • the first airflow pathway f 1 extends from first inlet 14 defined between the cover plate 18 and the front wall 34 of the skirt section 24, then via the aperture 35 formed in the front wall 34, and finally via the inlet opening 17 into the housing 12.
  • the second airflow pathway f 2 extends from the second inlet 28 defined between the side wall 30 and the side wall 32, between the space between the inner surface of the front wall 34 and the front end of the main body 26 and via the inlet opening 17 into the housing 12.
  • the fan assembly design therefore provides a secondary, concealed, airflow path into the fan, whilst protecting the fan from adverse water ingress and maintaining good appearance.
  • the design of the inlet is also arranged to optimise the flow pattern into the impeller inlets
  • the design of the present invention is intended for operation with centrifugal fans of all types, and axial and mixed flow fans.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP14157921.9A 2013-03-05 2014-03-05 Ensemble de ventilateur à extraction à double entrée Active EP2775147B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1303901.1A GB2511518B (en) 2013-03-05 2013-03-05 A dual inlet extract fan assembly

Publications (3)

Publication Number Publication Date
EP2775147A2 true EP2775147A2 (fr) 2014-09-10
EP2775147A3 EP2775147A3 (fr) 2014-12-03
EP2775147B1 EP2775147B1 (fr) 2019-08-14

Family

ID=48142427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14157921.9A Active EP2775147B1 (fr) 2013-03-05 2014-03-05 Ensemble de ventilateur à extraction à double entrée

Country Status (2)

Country Link
EP (1) EP2775147B1 (fr)
GB (1) GB2511518B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020128123A1 (fr) * 2018-12-21 2020-06-25 Soler & Palau Research, S.L. Extracteur à double entrée d'air
RU2775735C1 (ru) * 2018-12-21 2022-07-07 Солер Энд Палау Рисёрч, С.Л. Вытяжной вентилятор с двойным входом
WO2024113885A1 (fr) * 2022-11-30 2024-06-06 珠海格力电器股份有限公司 Ventilateur à flux mixte, ensemble ventilateur et climatiseur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106969458B (zh) * 2017-04-24 2023-09-26 珠海格力电器股份有限公司 加热式加湿器储水结构及加湿器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB583557A (en) * 1944-10-26 1946-12-20 Joseph Cuthbert Akester Improvements in or relating to ventilating fan units
GB584398A (en) * 1944-08-16 1947-01-14 Greenwood S And Airvac Ventila Improvements in and relating to ventilators
CH682012A5 (en) * 1989-09-29 1993-06-30 Robert Spieldiener Motor driven bathroom ventilator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1247761A (en) * 1969-04-02 1971-09-29 Powrmatic Ltd Improvements in and relating to power ventilators

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584398A (en) * 1944-08-16 1947-01-14 Greenwood S And Airvac Ventila Improvements in and relating to ventilators
GB583557A (en) * 1944-10-26 1946-12-20 Joseph Cuthbert Akester Improvements in or relating to ventilating fan units
CH682012A5 (en) * 1989-09-29 1993-06-30 Robert Spieldiener Motor driven bathroom ventilator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020128123A1 (fr) * 2018-12-21 2020-06-25 Soler & Palau Research, S.L. Extracteur à double entrée d'air
ES2769475A1 (es) * 2018-12-21 2020-06-25 Soler & Palau Res Sl Extractor de doble entrada de aire
RU2775735C1 (ru) * 2018-12-21 2022-07-07 Солер Энд Палау Рисёрч, С.Л. Вытяжной вентилятор с двойным входом
EP3901467A4 (fr) * 2018-12-21 2022-09-14 Soler & Palau Research, S.L. Extracteur à double entrée d'air
WO2024113885A1 (fr) * 2022-11-30 2024-06-06 珠海格力电器股份有限公司 Ventilateur à flux mixte, ensemble ventilateur et climatiseur

Also Published As

Publication number Publication date
EP2775147B1 (fr) 2019-08-14
EP2775147A3 (fr) 2014-12-03
GB2511518A (en) 2014-09-10
GB2511518B (en) 2018-11-28
GB201303901D0 (en) 2013-04-17

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