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WO2012148339A1 - Perfectionnements apportés à une unité de ventilation ou s'y rapportant - Google Patents

Perfectionnements apportés à une unité de ventilation ou s'y rapportant Download PDF

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Publication number
WO2012148339A1
WO2012148339A1 PCT/SE2012/000058 SE2012000058W WO2012148339A1 WO 2012148339 A1 WO2012148339 A1 WO 2012148339A1 SE 2012000058 W SE2012000058 W SE 2012000058W WO 2012148339 A1 WO2012148339 A1 WO 2012148339A1
Authority
WO
WIPO (PCT)
Prior art keywords
openings
air
ventilation unit
pressure
nozzles
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.)
Ceased
Application number
PCT/SE2012/000058
Other languages
English (en)
Inventor
Gert NIMBLAD
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2012148339A1 publication Critical patent/WO2012148339A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/01—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/005—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted on the floor; standing on the floor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F2013/0616—Outlets that have intake openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/40—Pressure, e.g. wind pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/14—Details or features not otherwise provided for mounted on the ceiling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention refers to a ventilation unit for supplying ventilated air to a number of spaces.
  • a number of ventilation units are fed with ventilated air from outside via a central fan in order to be pressed through a number of smaller no z z 1 e s / open i ng s in said ventilation unit.
  • a desired number of noz zles /openings are as reguired open to supply ventilated air to said space.
  • the central fan works less in order to achieve the same pressure towards the no z z le s / openings , so that the energy consumption of the central fan reduces in proportion to the number of no z z le s / openings which are open.
  • Today ventilation units are used by which one takes in an amount of ventilated air to a space, e.g. a hotel room from outside from a central fan located in that place.
  • a space e.g. a hotel room from outside from a central fan located in that place.
  • the ventilated air comes in to the ventilation unit it passes in the same no z z le s /openings in a wall of a mixing chamber in said ventilation unit with a certain pressure, which causes a negative pressure in the mixing chamber, which sucks in room air into the same, through a heat exchanger.
  • the ventilated air is mixed with the room air in the mixing chamber.
  • the mixed air is now heated or cooled in order to warm up or cool down the space.
  • the motor speed of the central fan is lowered when the need of ventilated air decreases in the space, the pressure through the no z z 1 e s / openi ng s will be too low and in that case also the negative pressure in the mixing chamber for the room air to be able to be sucked enough into said mixing chamber. Then the amount of mixed air decreases which shall flow into the space too much. If the air pressure is lowered e.g. to the half value towards the no z z 1 e s / opening , the air flow decreases through these to the mixing chamber to a quarter according to physical laws. It is thus impossible to decrease the energy consumption of the central fan by decreasing the pressure or the air flow through the nozzles/openings .
  • the object of the present invention is to eliminate the drawbacks existing with the structures mentioned above by maintaining the same pressure and air flow through each open no z z le /opening when at least one of them is closed owing to reduced need of ventilated air to said space, which makes that the negative pressure at each no z z le / opening will be the same, why the negative pressure in the mixing chamber at each no z z le /opening sucks in the room air into the mixing chamber with good efficiency at the same time as the motor speed of the central fan decreases and saves energy.
  • the invention refers to a ventilation unit, which is manufactured for instance of thin sheet metal and plastic and which supplies spaces e.g. a number of hotel rooms with ventilated air in order to achieve a desired amount of air there by the time and a desired temperature in those spaces.
  • the ventilated air comes from a central fan placed outdoors and is pressed in through a number of no z z 1 e s / opening s in the ventilation unit with a predetermined pressure of e.g.
  • the ventilated air is pressed through a number of open no z z le s / openings having the same size, which are supplied by the same amount of ventilated air each and per unit of time.
  • a wall in the ventilation unit which separate the mixing chamber from a pressure chamber, to which the ventilated air is pressed in from a ventilation conduit or duct extending from the central fan up to supplying openings in the pressure chamber.
  • the number of noz zles /openings which are closed or are usable for supplying of ventilated air is determined of how big amount of ventilated air which for the moment is needed for said space.
  • a number of nozzles/ openings are closed off from being passed by said ventilated air.
  • a fewer number than the maximum number of no z z 1 e s /opening s are in this case open, which are passed with the same pressure in the pressure chamber, e.g.
  • fig. 1 shows a translucent view from above through a ventilation unit
  • fig. 2 shows a vertical cross-section through said ventilation unit
  • FIG. 3 shows a vertical cros s - s ect ion through a no z z le / openi ng pointing into a mixing chamber
  • fig. 4 shows a vertical cross-section through a pressure chamber viewed towards a wall provided with no z z le s / openings .
  • a ventilation unit 1 which supplies a space 3 with ventilated air 2 from outside via a central fan 5.
  • the ventilated air 2 is pressed in through a number of noz zles /openings 4 with a predetermined pressure in a mixing chamber 6 in the ventilation unit 1 and there a negative pressure is created, which sucks in room air 8 from the space 3 into the mixing chamber 6 through a heat exchanger 7, which is mixed with the ventilated air 2 to mixed air 28, which is pressed further into the space 3.
  • Open no z z le s /openings 4 are continuously flowed through by ventilated air 2 at the same time as other are closed.
  • a pressure sensor 22 notices automatically the pressure and adapts the same to continuously lie on the same level after or dependent on the number of open nozzles/openings 4.
  • These are provided in a wall 9, which separates the mixing chamber 6 from a pressure chamber 10, into said pressure chamber 10 the ventilated air 2 is pressed from ventilating conduits or ducts 12 from the central fan 5 to air intake openings 11 in said pressure chamber 10.
  • the ventilating unit 1 is formed as a box 29.
  • the nozzles/openings 4 are provided along a horizontal line 25 (fig. ) in the wall 9 a distance from each other and are pointing across the wall 9 inwards to the mixing chamber 6.
  • An inner roof 23 of the pressure chamber 10 is provided towards the roof 24 of the space 3.
  • the heat exchanger 7 is provided below the mixing chamber 6 in order to from there suck in the room air 8 through the heat exchanger 7 from the upper portion of said space 3 where the room air 8 is most heated.
  • the pressure chamber 10 is divided by a partition wall 21 into two smaller pressure chambers 14 each having its own pressure sensor 22, with its own air intake opening 11, where the ventilated air 2 is pressed in through its own ventilation duct 12, which has its own throttle 13 in order to open or close the flowing through of said ventilated air 2.
  • the no z z 1 e s / openings 4 having closed throttle 13 are not flowed through in that case.
  • the no z z le s /openings 4 having open throttle 13 are on the other hand flowed through.
  • the box 29 is about lOOOx 1000x200 mm.
  • the wall 9 is in this case straight and has five no z z 1 e s / openings 4.
  • the two smaller pressure chambers 14 have a width in the flowing direction 17 of the ventilated air of about 170 mm.
  • the one smaller pressure chamber 14 has two noz zles /openings 4 and the other three noz zles /openings 4.
  • By help of the throttle 13 it is possible to choose two, three or five open no z zles /openings 4.
  • the invention can of course also be used if the nozzles/ openings 4 can be opened and closed totally by aid of controllable elements, such as e.g. a cover, whereby one can if desired, via a controllable control located outside said space 3, guide the element manually to be opened or closed or the elements can also be guided by an electric motor, which can be regulated electrically by contact controls.
  • the no z z le s / openings 4 are formed as a hollow cone 16 without an apex, the length of which is about 20 mm, the mantle surface has a thickness of about 0.5-2 mm and which has a round opening in each end through which the ventilated air 2 flows in a flow direction 17.
  • the cone 16 has a narrow round opening 18 with a diameter of about 25 mm, which is turned inwards to the mixing chamber 6 and a wider, round opening 19 having a diameter of about 30 mm through which said ventilated air 2 flows in, said opening is firmly connected into an equal large opening in the wall 9.
  • a negative pressure is established at the narrow diameter 18, where the ventilated air 2 increases its flow velocity and diverges into the mixing chamber 6 with a spread of about 10-30° around the centrum line 15 of the cone 16, which is angled about 90° towards the wall 9, which in turn is angled about 90° towards the inner roof 23.
  • the flow of air through each cone 16 is about 4 liter/s.
  • the cone 16 has a rounded radius 20 on its inside, at its connection to the wall 9 in order to facilitate the flow of air through the cone 16 into the mixing chamber 6, where it flows further out through at least one opening 30, which is formed as a screen pattern, which gives a small air resistance and is provided in the front gable 31 of the box 29 pointing into said space 3 in a direction in parallel to the roof 24 in order to achieve a smooth distributed pressure against the whole opening 30, which reduces the flowing out of the mixed air 28 to a minimum through the opening 30.
  • the partition wall 21 divides up the pressure chamber 10 in delimiting the every other no z z le /opening 4 to a first smaller pressure chamber 26, turned upwards against the inner roof 23 and every other no z z le / opening 4 being delimited downwards against the space 3 to a second smaller pressure chamber 27, whereby when closing of the throttle 13, every other no z z le /opening 4 is closed, said ventilated air 2 in that case is distributed uniformly over the whole mixing chamber 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air-Flow Control Members (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Duct Arrangements (AREA)

Abstract

La présente invention concerne une unité de ventilation (1) fournissant de l'air ventilé (2) depuis l'extérieur à un espace (3) par le biais d'au moins un ventilateur central (5), qui comprime l'air ventilé (2) au moyen d'un certain nombre de buses/ouvertures (4) présentes dans ladite unité de ventilation (1) jusqu'à au moins une chambre de mélange (6) située dans ladite unité de ventilation (1) et qui y crée une pression négative et aspire à l'intérieur l'air ambiant (8) de l'espace (3) dans la chambre de mélange (6) au moyen d'un échangeur de chaleur (7), ledit air ambiant (8) étant mélangé avec l'air ventilé (2) et étant chauffé ou refroidi par un milieu dans l'échangeur de chaleur (7), ledit air mélangé (28) étant, à partir de là, comprimé dans l'espace (3). En cas de besoin d'air ventilé (2), au moins l'une des buses/ouvertures (4) peut être traversée sous une pression prédéterminée à partir du ventilateur central (5) alors que les autres buses/ouvertures (4) sont fermées, ladite pression étant automatiquement remarquée par au moins un capteur de pression (22) stabilisant la pression quel que soit le nombre de buses/ouvertures (4) ouvertes/fermées, ce qui permet d'économiser l'énergie requise pour le fonctionnement du ventilateur central (5).
PCT/SE2012/000058 2011-04-27 2012-04-26 Perfectionnements apportés à une unité de ventilation ou s'y rapportant Ceased WO2012148339A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1100319A SE535935C2 (sv) 2011-04-27 2011-04-27 Anordning vid ett ventilationsaggregat
SE1100319-1 2011-04-27

Publications (1)

Publication Number Publication Date
WO2012148339A1 true WO2012148339A1 (fr) 2012-11-01

Family

ID=47072604

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2012/000058 Ceased WO2012148339A1 (fr) 2011-04-27 2012-04-26 Perfectionnements apportés à une unité de ventilation ou s'y rapportant

Country Status (2)

Country Link
SE (1) SE535935C2 (fr)
WO (1) WO2012148339A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186327A (en) * 1963-02-28 1965-06-01 Worthington Corp Induction unit for air conditioning systems
DE19921463A1 (de) * 1999-03-11 2000-09-14 Adam Bernhardt Verfahren zur Temperierung einer Halle und Einrichtung zur Durchführung des Verfahrens
US6213867B1 (en) * 2000-01-12 2001-04-10 Air Handling Engineering Ltd. Venturi type air distribution system
US20070164124A1 (en) * 2006-01-16 2007-07-19 Halton Oy Supply air terminal device and method for regulating the airflow rate
WO2010010230A2 (fr) * 2008-07-24 2010-01-28 Halton Oy Système de climatisation et procédé de climatisation
EP2169322A1 (fr) * 2008-09-24 2010-03-31 Inteco B.V. Convecteur de plafond par induction de courant croisé

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186327A (en) * 1963-02-28 1965-06-01 Worthington Corp Induction unit for air conditioning systems
DE19921463A1 (de) * 1999-03-11 2000-09-14 Adam Bernhardt Verfahren zur Temperierung einer Halle und Einrichtung zur Durchführung des Verfahrens
US6213867B1 (en) * 2000-01-12 2001-04-10 Air Handling Engineering Ltd. Venturi type air distribution system
US20070164124A1 (en) * 2006-01-16 2007-07-19 Halton Oy Supply air terminal device and method for regulating the airflow rate
WO2010010230A2 (fr) * 2008-07-24 2010-01-28 Halton Oy Système de climatisation et procédé de climatisation
EP2169322A1 (fr) * 2008-09-24 2010-03-31 Inteco B.V. Convecteur de plafond par induction de courant croisé

Also Published As

Publication number Publication date
SE535935C2 (sv) 2013-02-26
SE1100319A1 (sv) 2012-10-28

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