Classifications

• • 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
  • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
  • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
  • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
  • F24F13/1413—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using more than one tilting member, e.g. with several pivoting blades
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
  • A01K1/00—Housing animals; Equipment therefor
  • A01K1/0047—Air-conditioning, e.g. ventilation, of animal housings
  • A01K1/0064—Construction of air inlets or outlets in walls
• • 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
  • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
  • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
  • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
  • F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
• • 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
  • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
  • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
  • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
  • F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
  • F24F2013/146—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with springs

Definitions

• Cattle shed ventilation system with air intake valves, and such valves for such systems.
• the present invention concerns a cattle shed ventilation system with air intake valves, and also such valves for such systems. It is widespread practice that use is hereby made of wall-mounted intake valves configured in a box-like manner as rectangular tubes with a pivotable damper which from an outer lower-edge area ex- tends at an angle upwards and inwards for closing against an upper seating-edge area at the inner end of the box or the rectangular tube.
• the damper is spring-loaded to swing upwards towards this closed position, and thus in a simple manner can be disposed for controlled opening merely by being connected with a draw-string, by means of which it can be drawn down to provide a smaller or larger opening .
• the air intake is established by creating a certain underpressure in the cattle shed by means of roof-mounted extraction fans which can work with requirement-controlled effect, and whereby it is relevant to regulate the intake valves in order to achieve the desired admission characteristic of the sucked-in air. It is herewith of importance that the system works with angularly-disposed, pivotable dampers, in that with a slight degree of opening these will have an upwardly-controlling influence on the intake air, which is advantageous for a good distribution, of air in the cattle shed when operating with a low air exchange in connection with cold external air.
• the baffle-plate has a certain height or thickness which is so much less than the height dimension of the intake valve that in no way will it obstruct a free through-flow of air when this is what there is most use for, i.e. with fully open valve, regardless of whether there hereby arises a contribution from an external wind pressure.
• fig. 1 is a schematic perspective view of an intake valve according to the invention
• fig. 2 is a more detailed side section thereof, seen with the damper in the closed condition
• figs. 3-7 are corresponding side views for the illustration of the function at increasing degrees of opening
• fig. 8 is a graphical representation of a regulation sequence.
• the valve shown in fig. 1 has a rectangular, tubular housing 2 intended for building into the wall of a cattle shed with the shown right-hand end facing inwards. Near the outer end, right down at the bottom of the hous- ing, there is pivotably-mounted an inclined damper 4 which closes against the upper edge 6 of the housing. In a manner not shown, the damper 4 is spring-loaded towards its closed position, from which it can thus be swung down by means of a draw-string 8 which, in a manner not shown in more detail, is connected to a drive-station which can activate a larger number of such intake valves.
• the damper 4 in fig. 1 is shown in a slightly open position, and it will be seen that in front of the closing area there is a plate 10 mounted upright inside the housing.
• the immediate object of this plate, which is the said air baffle plate, is to reduce the effect of an external wind pressure with regard to the passage of air through the valve, otherwise at the lower degrees of opening this could cause disturbances in the automatic regulation of the ventilation. At higher degrees of opening, this situation will gradually be of less significance, and eventually the baffle effect on the inflow of air will be directly undesired, i.e. when a high exchange of air is required anyway.
• baffle-plate also more generally offers appreciable advantages, in that with qualified control it is made possible to minimise the irregularities and hunting which often arises in the relevant systems in connection with changes in the ventilation conditions. This is discussed in more detail below.
• the baffle-plate 10 can be turned to the horizontal as a well- controlled function of the opening of the damper 4, although not as a linear function, and the plate 10 is therefore pivotably-disposed around a horizontal axis by means of axle journals 12.
• the plate 10 is held in its vertical position by be- ing drawn up against a fixed stop 14 by means of a spring 16 which is secured to an edge flange standing slightly inwards at the outer end of the housing 2.
• the parts mentioned above are also to be found in fig. 2, where the said edge flange is indicated by reference figure 18.
• the plate 10 is thus made to swing down through an intermediate position as shown in fig. 5 to an end position shown in fig. 6.
• the projection 32 at the lower edge of the plate will abut against a fixed stop 30 in the housing 2, so that the damper 4, under the stretching of the springs 24 and 26, can hereafter be drawn further down towards a fully open position, cf. fig. 6.
• the spring system 24,26 it is not necessary for the spring system 24,26 to comprise two springs, merely providing that the system is arranged to start functioning after a certain opening of the damper, and thereafter to overcome the tension from the spring 16 for graduated swinging of the baffle- plate 10 over a certain area of regulation, so that in the individual installation the aim will be to achieve a reasonably even course for the curve cf. fig. 8.
• the kind of means used to co ntrol the swinging movement of the damper 4 is not decisive for the invention.

Landscapes

• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Environmental Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Zoology (AREA)
• Animal Husbandry (AREA)
• Biodiversity & Conservation Biology (AREA)
• Air-Flow Control Members (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8088872

Family Applications (1)

Country Status (3)

Cited By (5)

Citations (5)

• 1997
  • 1997-01-09 DK DK2397A patent/DK2397A/da not_active Application Discontinuation
• 1998
  • 1998-01-09 WO PCT/DK1998/000014 patent/WO1998030086A1/da not_active Ceased
  • 1998-01-09 AU AU53128/98A patent/AU5312898A/en not_active Abandoned

Patent Citations (5)

Also Published As

Similar Documents

Legal Events