Classifications

• • 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
  • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
  • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
  • F24F7/10—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with air supply, or exhaust, through perforated wall, floor or ceiling
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
  • E04B9/02—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation having means for ventilation or vapour discharge
• • 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
  • F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
  • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
  • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
  • F24F3/167—Clean rooms, i.e. enclosed spaces in which a uniform flow of filtered air is distributed

Definitions

• the present invention relates to a system for climate control in a room through ventilation of the room comprising a ventilating ceiling, a pressure chamber above the ceiling, means for supplying air to the pressure chamber, discharge means for suction of air out of the room, and means for control of the air supply means for control of the climate in the room.
• a ceiling of this kind is known from European patent applications EP-A-0 255 739 or EP-A-0 294 909 in which a livestock building, which is provided with an air- permeable ceiling with a pressure chamber in the garret under the ridge of the building is described. The air is led into the garret in which a certain excess pressure is created so that the air penetrates the ceiling and flows into the livestock building. Suction from the livestock building may, e.g. take place through the floor as illustrated in EP-A-0 255 739 or EP-A-0 294 909. The air supply, and potentially the suction channels, may be provided with a baffle for control of air circulation.
• the ceiling is comprised by wooden fibreboard panels through which air from the garret may be diffused down into the room below.
• This covering of the ceiling is used for many types of constructions due to its acoustical properties, as well as to aesthetic and financial considerations.
• This ceiling-based type of ventilation is thus relatively inexpensive and efficient but mainly utilised in connection with livestock buildings.
• a ventilated ceiling construction for environmental control of a clean room e.g. in a laboratory, is described in US-A-3,975,995.
• the ceiling consists of two layers; the upper layer is made up by a mixed array of filter panels and blank panels, and the second ceiling layer is perforated.
• the first, upper layer defines a dirty air barrier by filtering the air through to the space between the two layers. From this clean air plenum, the clean air is pressed through the second dropped ceiling layer and into the clean room.
• this ceiling construction is provided with a discharge in the floor of the enclosure to be ventilated.
• This ceiling construction is complicated in its design and is suitable for clinically clean air supply in laboratory rooms, e.g. clean rooms, in which the requirements to the cleanliness of the air are extensive.
• the ventilation principle applied in these known ceiling constructions is a so-called piston displacement where a massive air supply from the entire ceiling or the surface of the wall is carried out with the discharge of air taking place on the opposite surface.
• this method of ventilation is insufficient when used for comfort ventilation, e.g. with respect to assembly rooms (cinemas, theatres, receptions, restaurants etc.), sports centres, housing, office facilities (large rooms or small rooms or computer rooms), cafeterias etc.
• climate control is to be understood as ventilation and potentially cooling of the air for establishment of the desired climate comfort.
• Ventil systems may furthermore not be desirable for architectural and utilisation reasons since they often comprise components which are quite visible in the rooms of the buildings and may limit utilisation of the space. This may be particularly true during subsequent installation of ventilation systems in older buildings.
• the ventilation system may only be changed through complete reinstallation of the ventilation system which is usually not practically feasible since the installation of a ventilation system with ventilation channels etc. are often integrally installed in a building.
• the object of the invention is to create a ventilation system and a method of climate control of the initially mentioned kind, which are suitable for comfort ventilation and which may be adjusted to the relevant requirements of ventilation in a room.
• the ceiling comprises a predetermined combination of one or more active and one or more passive sections corresponding to the actual interior configuration of the room where the active sections allow for air-penetration from the pressure chamber into the room contrary to the passive sections which do not allow air penetration, said predetermined combination being determined in accordance with the size and location of the convection sources in the room.
• a method of controlling the climate in a room through ventilation of the room whereby air is blown into a pressure chamber from which the air penetrates a ventilating ceiling at low impulse blowing into the room from which the air is subsequently sucked out, whereby the air is prevented from penetrating the one or more passive sections in a predetermined pattern of passive and active sections in the ceiling and thus only penetrates through the ceiling at the one or more active sections in the ventilating ceiling which allows for penetration, said predetermined pattern being determined in accordance with the size and location of the convection sources in the room.
• a third aspect of the invention relates to a ceiling for use in connection with a system and a method of climate control of a room, where the ceiling is made up by panels accommodated in suspension means, and where the ceiling comprises a predetermined combination of one or more active and one or more passive sections depending on the relevant characteristics of the room, said sections being made up by one or more active or passive panels, respectively, where the active panel allows penetration of air from the pressure chamber into the room contrary to the passive panel which is impermeable, said predetermined combination being determined in accordance with the size and location of the convection sources of the actual lay-out in the room.
• a simple and efficient system for climate control of a room in which the sections of the ceiling are used as air supply surface in connection with comfort ventilation of a room. These sections form the ceiling in accordance with the convection sources in the room so that customised appropriate ventilation takes place in the areas of the room in need thereof. In this manner, an optimal utilisation of the amount of air used for ventilation of the room is obtained.
• the one or more active sections of the ceiling are penetrable whereby low impulse blowing (also referred to as inlet air diffusion) of air from the pressure chamber is obtained which creates a steady flow from the supply surface towards the areas of accommodation/convection sources of the room.
• control means comprises control of the amount of airflow, speed of the air supply, temperature, and/or humidity. In this manner, it is possible to control the indoor climate accurately, just as the impact of the variations in the outdoor climate may be compensated for.
• control means may even include controlling the discharge suction means. In this manner, the circulation of air in a room and the replacement of air may be controlled.
• the discharge suction means may be located immediately under the ceiling or at floor level in the room.
• a third option is to have one or more suction points with a combination of suction means at the floor level and near the ceiling. This provides an additional possibility of influencing air circulation or suction in the room.
• the distributor plate is located in front of the air supply means so that good distribution of the air supply into the pressure chamber is obtained.
• a dropped ceiling is provided, whereby a pressure chamber is created above the ceiling.
• the ceiling is preferably insulated allowing for a difference in temperature between the top and the bottom side thereof.
• the air supply is led into the pressure chamber at a lower temperature than the desired room temperature, preferably at a difference in temperature of approx. 8 to 10 °C, but even lower temperatures may also be applied if appropriate by the conditions.
• a difference in temperature of approx. 8 to 10 °C, but even lower temperatures may also be applied if appropriate by the conditions.
• diffuse ventilation is obtained since cooled air penetrates the ceiling/air supply surface, which will sink into the room due to the difference in temperature. If the temperature difference is approx. 1 to 2 °C, low impulse ventilation may be created and the air will be mixed with the air in the room. Contrary to the known ventilation systems, greater air-based cooling may be achieved by the invention.
• W/m or more e.g. up to 100 W/m , may be obtained.
• a suitable pressure loss above the active panels in the ceiling is e.g. between 0.3 to 2.0 Pa., preferably 0.7 to 1.0 Pa., so that penetration of air through the ceiling panels is ensured, said panels preferably being made of wood-wool/cement, just as reasonable air distribution over the air inlet surface is ensured whilst a controlled the air supply via the panels and not through leaks in the ceiling into other rooms is ensured.
• the wood-wool/cement panels a particularly advantageous inlet of air into a room is obtained in comparison with known air supply surfaces due to the surface structure and thickness of the panels.
• the speed at which the air is supplied into the pressure chamber is approx. 1 to 2 m/s, and preferably not more than 3 m/s.
• the airflow speed of the inlet air supply may be increased to 3 m/s by using a distribution plate in front the of the air supply inlet.
• the one or more active panels are preferably made of a compressed wooden fibre material encompassed by cement.
• the one or more passive panels are preferably made as a laminated sheet comprising a layer of compressed wooden fibre material encompassed by cement, which is provided with an air barrier on the pressure chamber side. In this manner, it is possible to create a uniformly looking ceiling when looking at it from below since the active and the passive panels will not be visible.
• the air barrier is comprised by a fully sealed insulating mat.
• the pressure chamber is located inside the climate protection screen of the building, i.e. inside the thermal insulation.
• a ceiling In the preferred embodiment of a ceiling according to the invention, it is a modular configuration with individually replaceable panels. In this manner, a particularly simple "standard" ceiling may be obtained by means of which it is very simple, quick and thereby inexpensive to rearrange the active and passive sections so they meet the actual ventilation requirements of a room.
• the active and passive panels are provided with a rectangular basic shape with abutting lateral edges designed with complementary overlaps, and preferably in such a manner that the first lateral edge is provided with a longitudinal recess and the abutting lateral edge on the adjacent side is provided with a longitudinal tongue.
• an overlap is provided at the joint so that the passive panel edge will prevent air penetration.
• the joint may be replaced by a tongue-groove joint instead.
• the joint(s) between two panels or between a panel and an abutting surface may be provided with sealing means such as cover plates, guides or the like.
• sealing means such as cover plates, guides or the like.
• the area of the active sections is approx. 1/8 of the total ceiling area. This area may be smaller or larger depending of the actual needs for ventilation. In this manner, good air distribution is ensured in the room. In addition, adjustment possibilities for control of the air supply pattern are ensured.
• a method of installation of a climate control system in a room comprising identification of the convection sources in the room, especially size and location, and planning of the ventilating ceiling on the basis hereof, including determination of a pattern of active and passive panels and installation of the ceiling and potentially installation of the air supply and discharge suction means of the climate control system if not already installed.
• the ceiling may be composed in accordance with the relevant requirements.
• This method of installation may be utilised in relation to both installation of new ceilings and reconstruction of old ceilings in accordance with redefined needs for ventilation in a room.
• a simple and hitherto unknown method of installation of ventilated ceilings is provided.
• fig. 1 shows a schematic view of a system for climate control according to the invention
• fig. 2 shows a schematic view of a ceiling according to the invention, seen from above
• fig. 3 shows a first embodiment of a panel joint in a ceiling
• fig. 4 shows a second embodiment of a panel joint and the construction of a passive panel.
• fig. 1 The principles of a system for climate control according to the invention are shown in fig. 1 for ventilation/climate control of a room 1.
• a pressure chamber 2 is provided above the room 1.
• the room 1 and the pressure chamber 2 are separated by a partially air-penetrable ceiling 3, which is preferably mounted in the entire length of the room.
• inlet means 5 are arranged for supplying fresh air into the pressure chamber 2 and discharge suction means 6 are arranged for discharging air from the room 1.
• the climate control system is shown in relation to ventilation of one room 1 but the pressure chamber may also be a joint chamber for more neighbouring rooms in a building 4.
• control of air humidity, temperature, and airflow inlet velocity may be provided according to the requirements, just as the air supply ensures a slight excess pressure in the pressure chamber.
• the airflow and the rate of air exchange cycles in the room may also be regulated by controlling the inlet air supply and discharge suction.
• the flow rate of the air supply into the pressure chamber should be selected with respect to the pressure loss at the ceiling plates and the airflow velocity of air in the room. If the airflow speeds are too high in the room, this will be perceived as a draught and thus have a negative effect on the comfort of the room.
• the ceiling 3 has a number of passive sections/panels 7 and active sections/panels 8 which are installed in a predetermined combination in relation to the relevant location of convection sources 9 in the room 1, where the active sections 8 allow penetration of air from the pressure chamber 2 into the room 1 contrary to the passive sections 7 which do not allow air penetration.
• the ceiling 3 is a module construction with a number of panel plates, e.g. installed in a mesh of ceiling profiles in a false ceiling.
• the active sections are made up by plates 8 manufactured in a compressed wood fibre material encompassed by cement, so- called Troldtekt® ceiling plates. These plates are air-penetrable and do at the same time posses good acoustically dampening properties.
• the passive sections are made up by laminated plates 7.
• the air barrier 7b is made up by a fully sealed insulating mat, such as a so-called Rockfon® plate. In this manner, good thermal and acoustical insulation of the ceiling 3 is obtained, just as this laminate plate 7 ensures a uniform ceiling surface in the room 1.
• the convection sources 9 may be all kinds of heat sources, e.g. accommodation areas, computer equipment or other machinery, heaters, coolers etc.
• the ceiling panels 7, 8 are installed in a pattern corresponding to the relevant individual requirements for ventilation of the room 1, as shown in e.g. fig. 2.
• Fig. 2 shows a schematic view of a ceiling 3 according to the invention seen from the pressure chamber 2.
• a baffle plate 10 has been placed in front of the air supply inlet 5 so that incoming air is distributed in the pressure chamber 2, whereby more harmonic air distribution is obtained.
• the active and passive sections 7, 8 in the ceiling 3 are, as shown in fig. 2, installed in a predetermined pattern.
• This pattern is determined based on a preliminary analysis of the ventilation requirements prior to the installation of the ceiling and installation of the climate control system.
• This preliminary analysis comprises registration of the size and location of the convection sources 9 (see also fig. 1) based on which the pattern of active and passive sections in the ceiling may be determined.
• This method of determination of the combination of the passive and active sections of the ceiling may be used in relation to both new installations and to existing installations of ventilation systems in order to achieve as optimal and comfortable a ventilation of the room as possible with respect to the actual interior lay out and use of the room.
• the ceiling panels 7, 8 are provided with lateral edges 12, 13 designed with mutually complementary shapes so that a certain overlap is obtained which reduces the risk of leaks and an optimised control air supply is obtainable.
• the lateral edges of a panel may be designed with a protruding tongue 13, 13' fitting into a corresponding chamfer 12 or recess 12' in the adjacent plate.
• the embodiment may either be a wedge-shaped tongue 12 and a chamfer 13, as shown in fig. 3, or a rectangular tongue 13' and a corresponding recess 13', as shown in fig. 4. It will also be possible to have a combination of more joint geometries. Corresponding overlaps may also be established at the other edges of the plates. This overlap does not only improve the sealing of the joints but also makes it easier to mount them to the ceiling since the lateral edges make it easier to position the panels correctly.
• the joint shown in fig. 4 is particularly simple since the tongue 13' and the recess 12' are created by displacing the fibre plate 7a and the air barrier 7b during lamination so that a tongue 13' and a recess 12' will appear automatically at the two lateral edges of the plate 7.
• This sealing plate 11 may be a self-adhesive tape, a lists or the like.
• a system for climate control is provided which is well suited for comfort ventilation in many different types of rooms.
• a system for comfort ventilation according to the invention may be used for ventilation climate control of office facilities, computer rooms, theatre and cinema rooms, receptions, restaurants, museums, libraries, assembly rooms, cantinas, dressing rooms, sport centres, swimming baths, skating buildings, exercise facilities etc.
• the invention is described in relation to a ventilating ceiling surface in one room but it is understood that it may also be utilised to ventilate more rooms by means of one joint pressure chamber.
• a climate control system according to the invention may be implemented via other room surfaces, e.g. a wall surface such as a partition wall.
• ceiling used in this specification and in the accompanying claims also includes a wall-oriented solution, which is considered an equivalent solution in relation to the invention.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Architecture (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Building Environments (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8159848

Family Applications (1)

Country Status (4)

Families Citing this family (6)

Family Cites Families (10)

• 2000
  • 2000-11-17 DK DK200001725A patent/DK174537B1/da not_active IP Right Cessation
• 2001
  • 2001-11-08 WO PCT/DK2001/000735 patent/WO2002040926A1/en not_active Application Discontinuation
  • 2001-11-08 EP EP01980210A patent/EP1334315A1/en not_active Withdrawn
  • 2001-11-08 AU AU2002212111A patent/AU2002212111A1/en not_active Abandoned

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events