US3487767A - Fan for the ventilation of buildings,e.g.,stables - Google Patents

Fan for the ventilation of buildings,e.g.,stables Download PDF

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Publication number
US3487767A
US3487767A US700549A US3487767DA US3487767A US 3487767 A US3487767 A US 3487767A US 700549 A US700549 A US 700549A US 3487767D A US3487767D A US 3487767DA US 3487767 A US3487767 A US 3487767A
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Prior art keywords
fan
duct
vanes
ducts
injection
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US700549A
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English (en)
Inventor
Svend Helge Kristiansen
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Novenco Building and Industry AS
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Nordisk Ventilator Co
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Publication date
Priority claimed from DK53367AA external-priority patent/DK116759B/da
Priority claimed from DK272267A external-priority patent/DK115495B/da
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • 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
    • A01K1/0058—Construction of air inlets or outlets in roofs
    • 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
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/009—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by bleeding, by passing or recycling fluid
    • 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
    • F24F7/02—Roof ventilation
    • F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator
    • 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
    • F24F7/065—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 fan combined with single duct; mounting arrangements of a fan in a duct
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/70—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in livestock or poultry
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/70—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in livestock or poultry
    • Y02A40/76—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in livestock or poultry using renewable energy
    • 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]
    • Y02B30/56—Heat recovery units
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/50—Livestock or poultry management

Definitions

  • stables comprising two concentrical tubes in which two sets of interconnected concentric fan vanes are disposed so as to perform an injection of air through the outer tube and an exhaust of air through the inner tube, a by-pass being provided between the inner and the outer tube through a first damper which is coupled to a second damper in the outer tube and as the case may be also to one in the inner tube, in such a way that when the first damper is opened the other or others is or are closed and vice versa.
  • the invention relates to a fan for the ventilation of buildings, e.g. stables, in which the injection duct is fitted concentrically around the exhaust duct, in which exhaust duct the driving motor of the fan is fitted axially, which fan has two concentric, rigidly interconnected Sets of vanes of the type used in axial flow fans, which are arranged in such a manner that one set of vanes is located in one duct and the other set of vanes is located in the other duct and in which fan in the injection duct one or more adjustable dampers are provided.
  • the throttling performed for the control of the air volume, occasions that the fan has to operate within the so-called stalling range during a great part of its operational period. In this range the fan runs rather jerkily and noisily. In addition, the power consumption of the fan rises considerably when throttled.
  • the invention aims at providing a type of fan of the type discussed, by means of which the desired control of the injected quantity of air is achieved without the ment tioned drawbacks. 4
  • the injection duct is connected with the exhaust duct between the set of vanes and the dampers mentioned through an. adjustable damper, and the damping in the injection duct and in the connection between the two ducts are connected to each other and to a common adjustment means in'such a way that simultaneously with the opening of the damper in the injection duct, the damper between the two ducts is closed, and vice versa.
  • a by-pass is formed, which connects the pressure side of the set of vanes in the injection duct and the suction side of the set of vanes in the exhaust duct with each other, and by regulation of the damper in this by-pass in dependence of the adjustment of the dampers in the injection duct it is made possible to operate with very slight variations in the pressure in the injection duct in front of the dampers fitted therein.
  • the air volume delivered by the fan is determined by this pressure and the resistance to the outflow, and thus is chiefly proportional to the passage cross section of the dampers, which, moreover, entails a more suitable control than is the case with the known fans of the kind discussed, in which the throttling occasions a rise in pressure, so' that no linear connection between the air volume delivered and the adjustment of the throttling means exists.
  • a damper has also been provided in the exhaust duct, which is connected with said dampers and which respectively opens or closes simultaneously with the damper in the injection duct.
  • the total of the flow resistance through all the dampers is essentially constant irrespective of the adjustment of said dampers. It is thereby ensured that the fan operates constantly and essentially at the same point of its characteristic curve.
  • connection between the two ducts is formed by one or several apertures in the partition common between the two ducts
  • the throttling means in this connection consists of a cylindrical piece of tubing, with a cross section corresponding to that of the common partition and which is displaceable in the axial direction in such a fashion that it can more or less cover the apertures
  • the throttling means for the orifices consist of a cylindrical piece of tubing, which adheres to the outer wall of the injection duct and is displaceable in the axial direction in such a manner that it is capable of more or less closing the orifices, in addition to which the two pieces of tubing are rigidly interconnected.
  • the characteristic curve of the set of vanes in the injection duct is of the same kind and plays a very important role in the dimensioning, since on account of the smaller diameter, the stalling range of the characteristic curve makes itself felt still more markedly.
  • the regulating of the ventilation it is sufiicient, to be in a position to throttle the injection apertures and the supply of an additional volume of air via the connection between the injection duct and the exhaust duct employed according to the invention, entails no difficulties.
  • connection between the two ducts is generally located in the immediate proximity of both sets of vanes, if the dampers are arranged between the sets of vanes and the injection nozzle of the injection duct, it can at times be difiicult to achieve the desired control of the throttling of the connection between the two ducts.
  • these ditficulties can, according to the invention, be removed to a large extent by the injection duct possessing a larger cross section in its part located behind the set of vanes than at the level of the set of vanes.
  • a particularly advantageous embodiment of the invention is characterized in that the adjustable damper between the injection duct and the exhaust duct is arranged between the cap, and the set of vanes.
  • the said damper Since it must be taken for granted that the fan is so dimensioned that it will satisfy the maximum ventilation requirement and that this requirement arises only on rare occasions when the weather is cool, the said damper is, as a rule, opened slightly and consequently the additional advantage is attained, that the drawn-cold fresh air mixes itself with the stale air from the room into which it is being blown back, and thus being already slightly warmed up in the fan prior to being blown into the room.
  • connection with the atmospheric air can be completely interrupted in those cases where no demand for fresh air exists, if one regards the ventilated room as a whole, yet the fan continues to effect the same circulation of the air so that the air in the room is in continual agitation and that the air from the various parts of the room is being mixed and thus more evenly distributed.
  • the dampers in both ducts and between same are each designed as one unit comprising two semicylindrical parts in which the diameter of the semi-cylindrical parts correspond to the diameter of the partition between both ducts and in which the semi-cylindrical parts are rotatable around an axis, which forms a diameter of both ducts as well as of these parts and which are so bevelled at the top that the bevels form the same angle to both sides of the plane separating the two semicylinders when the parts are in a position in which they are aligned essentially with the partition between the due s, a d a e ch of he two p rs, 9m 1 dg s wit which it abuts upon the other part in the said position, is provided with flanges that extend to the outside'and that the outer edges at these flanges and the lower edges of both parts are of such a shape, that in a position in which the beve
  • heating means in the injection duct between the set of vanes and the injection orifice.
  • cooling means fitted in the injection duct between the set of vanes and the injection orifice.
  • cooling means do exist in the fan, so as to obviate the use of separate cooling means, and when the heating means happen to be heat exchangers through which a heating agent, e.g. warm water, is flowing, the same means can quite simply be utilized as cooling means, by having a cooling agent, e.g. cold water, flowing through same.
  • a heating agent e.g. warm water
  • the orifice of the injection duct comprise 1015 nozzles, the axes of which lie on a level at right angles to the axis of the duct like the. radii of a circle which is concentric with the duct and that in each nozzle separately adjustable throttling means are provided.
  • the optimum number of nozzles is 12, it. is, however, possible to reduce this number to 10, or to increase it to 15 without any deleterious effect. If the number is too low, the jets continue through the room as individual jets and have the effect of a draught.
  • the jets merge on account of the flow induction immediately below the nozzles so that they form a continuous, plate-shaped stream, which fully corresponds to an air current occurring in front of an annular passage slit, Such a plate-shaped air stream often tends to deflect downwards shortly after leaving the nozzles, so that currents are being created in the room which have the effect of a draught.
  • FIG. 1 shows in FIG. 1 an embodiment of the invention in longitudinal section
  • FIG. 2 a sectional view after the line II'II in FIG. 1;
  • FIG. 3 a part of the fan shown in FIG. 1 with a different setting
  • FIG. 4 the characteristic curve of an axial flow fan
  • FIG. 5 a part of the fan shown in FIG. 1 with a modi; l design of a det il,
  • FIG. 6 a longitudinal section through a modified embodiment of the fan according to the invention.
  • FIG. 7 a sectional view after the line VIIVII in FIG. 6, however, with a changed setting of the fan;
  • FIG. 8 a section of the fan shown in FIG. 6, shown identically, but with modified setting and FIG. 9 a sectional view after the line IXIX in FIG. 8.
  • the fan shown in FIGS. 1, 2 and 3 has an impeller with two concentric sets of vanes 2 and 3 driven by a motor 1, in which impeller the vanes of the one set are, mounted on a hub 4 and are fastened at their outer extremities to an annular member 5, which carries the vanes of the set of vanes 3.
  • the angle of pitch of these two sets differ by 180, so that the two sets blow in direction which are opposed to each other, and in the example shown in such a manner that the inner set of vanes blows in an upward direction and the outer set of vanes blows in a downward direction.
  • the partition 6 is interrupted from the impeller downwards up to the termination of the duct 9, and the aperture thus resulting between the ducts 8 and 9 is screened by a cylindrical piece of tubing 14, the diameter of which is substantially the same as that of the partition 6 between both ducts.
  • This piece of tubing is carried by a number of spokes 15, which are fastened to an adjustment rod 16, which, with the aid of an adjustment motor 17, is displaceable in the axial direction, so that the piece of tubing 14 can be displaced and the connection between both ducts 8 and 9 can be more or less opened or closed.
  • FIG. 3 shows the fan in a position, in which the ducts 8 and 9 are in unobstructed connection with each other via the aperture 18, which is adjusted to approximately half of its possible size.
  • a cylindrical piece of tubing 19 has been provided on the inside of the partition 7, which piece of tubing with the aid of a number of radial plates 20 is connected with the piece of tubing 14, and can be displaced together with tubing 14.
  • the connection between the pieces of tubing 19 and 14 is of such a kind that, when the aperture 18 is enlarged from its completely closed position to its completely opened position, the piece of tubing is displaced, downwards in front of the nozzles 10, from a position in which the nozzles are fully open, to a position in which they are completely closed.
  • the piece of tubing 14 is of such a length that it is able to slide, in the embodiment shown, downwards in front of the intake aperture 13, so that the throttling of this aperture on the whole corresponds to the throttling of the exhaust apertures.
  • the fan shown is mounted in the ceiling 21 of a building.
  • the ducts 8 and 9 are carried through the roof 22 of the building and are screened above the roof by means of a cowling 23 and a screen 24. Since the design of both cowling and screen does not concern the invention, it is superfluous to describe them in detail, it should, however, be briefly mentioned that the design is of such a kind that an intake aperture 25 for the injection duct 9 and a discharge aperture 26 for the exhaust duct 8 is formed.
  • the curve shows the normal characteristic operating curve of an axial flow blower and the curve a shows the pressure as a function of the air volume.
  • the curve b shows the power consumption of the drive motor as a function of the air volume.
  • the point P indicates the operational point at full performance.
  • the regulation of the injected air volume can only be eflected by the throttling of the injection nozzles 10 and in such throttling the operating point of the fan moves on the curve a. It can be seen from the curve that in the case of such throttling that the air volume is reduced to half, the operating point of the fan is at a point P of the curve, which lies within the stalling range of the fan. At this point the fan runs unsteadily and very noisily.
  • the inner vane set 2 operates according to a curve of the same characteristic as the one shown in FIG. 4. Even if throttling is used in the intake duct 13, as described in connection with FIGS. 1 and 3 above, so that the air volume drawn in is reduced the air volume is supplemented through the adjustment of the air volume flowing through the direct connection from duct 9 into duct 8. By appropriate dimensioning it can be achieved that the pressure below the interior fan blades 2 can be kept approximately constant, so that the fan operates at a certain extent at a constant point of the characteristic curve, resulting in the above-mentioned advantages.
  • FIG. 5 This can be expediently achieved by means of the embodiment shown in FIG. 5, which differs from the one shown in FIG. 1 in that instead of the cylindrical annular member 5, which interconnects the two sets, an annular member is employed, which, in radial section pOsseSses the form of a U.
  • One branch 27 of this annular member possesses a cylindrical form and has the same diameter as the partition 6 between both ducts and is fastened to the extremities of the vanes 2, while the other branch 28, which proceeds parallel to the first, also forms a cylinder, which, however, has a greater radius and carries the vanes 3.
  • the connection 29 between the two branches is turned against the flow direction in duct 9. It proves that by such a measure it is easier to adapt the adjustment of the throttling means 14 to the adjustment of the throttling means 19.
  • the air is blown rather far away from the fan parallel to the ceiling of the building through nozzles in rather sharply defined jets. If such a jet strikes a wall or some other obstacle, it may be deflected in a detrimental direction so as to create a draught, however, this can be prevented by providing individually adjustable throttling means in each of the nozzles. This Way said throttling means may at the same time operate as guide vanes. By throttling the nozzles which are directed at a Wall or some other obstacle, it can be ensured that the length of the sharply defined jets is shortened by so much that such deleterious deflections cannot occur.
  • the fan shown in FIGS. 6-9 comprises three parts, namely a cowling part 31, a control part 32 and a fan part 33, which are interconnected with the aid of pieces of tubing and 36 respectively, which lie between them and which are indicated by dotted lines.
  • the fan is destined to be mounted in a building exactly like the one shown in FIGS. 1-5, and in such a manner that the cowling part 31 is situated above the roof of the building, while the fan part 33 extends partially through a ceiling in the building down into a room that is to be ventilated.
  • the length of the pieces of tubing 35 and 36 is therefore adapted to the relative sizes of the building.
  • the fan part 33 comprises a motor 37, which drives an impeller with two concentric vane sets 38 and 39, of which one set is mounted on a hub 40.
  • an annular member 41 is fixed, which carries the vanes of the vane set 39.
  • the angle of pitch of the respective vanes of both sets differ 'by 180 so that both sets blow in directions which are opposed to each other and in the example shown in such a manner that the inner vane set blows in an upward direction and the outer vane set in a downward direction.
  • a tube 42 Coaxially with the vane sets 38 and 39 is mounted: a tube 42, which is in alignment with that part of the annular member 41 fixed to the outer extremities of the vanes of the vane set 38, and, a tube 43, which surrounds the outer vane set 39.
  • a tube 43 which surrounds the outer vane set 39.
  • an exhaust duct 44 and an injection duct 45 are formed and these two coaxial ducts extend upwards through the piece of tubing 36, the control part 32, the piece of tubing 35, and up to the cowling part 31.
  • the pieces of tubing 35 and 36 consequently comprise each two concentric tubes, as can be seen from the drawing.
  • the injection channel is provided with a number of orifices in the form of nozzles 46, the axes of which lie in a plane at right angles to the axis of the fan and are evenly distributed in such a manner that two each jointly form an angle of 30, i.e. the number of nozzles is 12.
  • heat exchangers 47 are mounted, which serve to heat or cool the air respectively with the aid of warm or cold water, as the case may be.
  • a guide vane set 48 is provided in each nozzle which can be adjusted independently of the guide vanes in the other nozzles which makes it possible to Control individually the air jets being discharged.
  • the control part 32 comprises one piece of tubing 48, which possesses the same diameter as the piece of tubing 43 and two pieces of tubing 49 which are concentric with the piece of tubing 48, the diameter of which corresponds to that of the piece of tubing 42.
  • the pieces of tubing 49 are mounted at a certain distance from each other in the axial direction so as to create an aperture 50, through which the two ducts 44 and 45 are connected.
  • the size of the aperture 50 can be controlled with the aid of a damper, which, in the embodiment shown is fitted in such a way that it simultaneously closes the passage through the ducts 44 and 45, so that both these ducts are completely blocked when the aperture 50 is opened to its maximum, but that they are completely opened when the aperture 50 is closed.
  • the said damper comprises two semi-cylindrical parts 51, the diameter of which corresponds to the diameter of the pieces of tubing 49.
  • These semi-cylindrical parts 51 are pivoted on an axis, which lies in an axial plane of both semi-cylindrical parts 51 as well as of the pieces of tubing 49 and which are in a position at right angles to the axis of the pieces of tubing as well as to the axes of both parts 51.
  • the axis lies at an edge 52 of each of the parts 51 and these edges are cut ofl in accordance with a plane through the pivotal axis beveled in such a manner that the two edges 52 rest against each other when the parts 51 are turned into the position shown in FIG. 8.
  • the semi-cylindrical parts 51 are provided with flanges 55 that extend to the outside in an axial plane.
  • the control of the damper comprising the parts 51 is carried out with the aid of rods 57, which are adjustable with the aid of a crank 58 fitted to a shaft 59.
  • the adjustment can be carried out manually or automatically in dependence of the temperature and possibly the degree of humidity in the room, the means to be used for this purpose have, however, no bearing on the invention as such and need consequently not to be described in detail.
  • An air injection and exhaust arrangement for the ventilation of buildings comprising: a fan, an exhaust duct, an injection duct fitted concentrically around the exhaust duct, a driving motor for the fan fitted axially within the exhaust duct, the fan having two concentric, rigidly interconnected set of vanes of the type used in axial flow fans, the vanes being so arranged that one set of vanes is located in one duct and the other set of vanes is located in the other duct, the exhaust duct being discontinuous over a portion of its length so as to interconnect the injection duct and the exhaust duct, damper means comprising two semi-cylindrical parts mounted in said disconnected portion of the exhaust duct so that in a first position the semi-cylindrical parts form a cylindrical section to close 06 said discontinuous portion and seal the exhaust duct with respect to said injection duct and, in a second position wherein said semi-cylindrical parts abuts one another to provide full communication between the injection duct and the exhaust duct at said discontinuous portion.
  • a device wherein said injection duct terminates in an injection orifice at right angles to the axis of the ducts.
  • heating and cooling means are mounted in the injection duct between the vanes and the orifice thereof.
  • injection orifice comprises a series of nozzles arranged in a common plane like radii of a circle.
  • a fan according to claim 1 characterized in that the orifice of the injection duct comprises some 10-15 nozzles, the axes of which lie on a plane, which is at right angles to the axis of the duct, like radii of a circle that is concentric with the duct, and that in each nozzle, damping means are provided which are separately adjustable.
  • An air injection and exhaust arrangement for the ventilation of buildings comprising: a fan, an exhaust duct, an injection duct fitted concentrically around the exhaust duct, a driving motor for the fan fitted axially within the exhaust duct, the fan having two concentric rigidly interconnected sets of vanes of the type used in axial flow fans, the vanes being so arranged that one set of vanes is located in one duct and the other set of vanes is located in the other duct, the exhaust duct being discontinuous over a portion of its length above the motor so as to interconnect the injection duct and the exhaust duct, damper means comprising two semicylindrical parts with flanges along the free longitudinal edges thereof, the parts having a diameter corresponding to the diameter of the exhaust duct and pivoted about an axis which is a diameter of both ducts and parts, the parts being bevelled at their upper edge so that when in a first position the parts form the cyindrical section to close off the discontinuous portion and seal the exhausted duct with respect to the injection

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US700549A 1967-01-30 1968-01-25 Fan for the ventilation of buildings,e.g.,stables Expired - Lifetime US3487767A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK53367AA DK116759B (da) 1967-01-30 1967-01-30 Ventilator til ventilation af bygninger, f. eks. stalde.
DK272267A DK115495B (da) 1967-05-24 1967-05-24 Ventilator til ventilation af bygninger.

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US3487767A true US3487767A (en) 1970-01-06

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US700549A Expired - Lifetime US3487767A (en) 1967-01-30 1968-01-25 Fan for the ventilation of buildings,e.g.,stables

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US (1) US3487767A (enrdf_load_stackoverflow)
CH (2) CH485177A (enrdf_load_stackoverflow)
DE (1) DE1628339B1 (enrdf_load_stackoverflow)
FI (1) FI47605C (enrdf_load_stackoverflow)
FR (1) FR1552555A (enrdf_load_stackoverflow)
NL (1) NL153307B (enrdf_load_stackoverflow)
NO (1) NO119851B (enrdf_load_stackoverflow)
SE (1) SE318083B (enrdf_load_stackoverflow)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722395A (en) * 1967-08-03 1973-03-27 G Courchesne Combined intake and exhaust ventilator
US3750557A (en) * 1970-11-16 1973-08-07 Nordisk Ventilator System for the ventilation of buildings
US3791279A (en) * 1971-07-06 1974-02-12 Nordisk Ventilator Damper unit for a ventilation system
US3830145A (en) * 1972-06-09 1974-08-20 Nordisk Ventilator Ventilation system
US3847065A (en) * 1972-06-09 1974-11-12 Nordisk Ventilator Ventilation system
US3970408A (en) * 1967-10-26 1976-07-20 Bio-Medicus, Inc. Apparatus for use with delicate fluids
US4344370A (en) * 1980-07-24 1982-08-17 Industrial Air, Inc. Apparatus for discharging exhaust gas at high velocity
US4506655A (en) * 1981-02-03 1985-03-26 Kuechler Irvin R Compact double fan apparatus and method with grease-separating capabilities
US4846261A (en) * 1987-11-05 1989-07-11 Karjasuo Oy Vacuum heat exchange apparatus for ventilation of buildings, in particularly of animal sheds
US5531566A (en) * 1994-08-24 1996-07-02 Societe Nationale D'etude Et De Construction De Moteurs D'aviation S.N.E.C.M.A. Self regulating bleed valve
US6632132B1 (en) * 1999-07-01 2003-10-14 Daikin Industries, Ltd. Tornado type intake and blowing device
EP1785675A1 (en) * 2005-11-11 2007-05-16 Monodraught Limited Ventilation arrangements
US20110171898A1 (en) * 2008-09-18 2011-07-14 Berling Gmbh Exhaust Hood
JP2012026616A (ja) * 2010-07-21 2012-02-09 Takasago Thermal Eng Co Ltd ルーフファンユニット及びルーフファンユニットの施工方法
US20120052792A1 (en) * 2010-08-31 2012-03-01 Broan-Nutone Llc. Ventilation Unit Calibration Apparatus, System and Method
US20130244559A1 (en) * 2012-03-16 2013-09-19 Illinois Tool Works Inc. Airborne component extractor manifold
GB2528982A (en) * 2014-08-08 2016-02-10 Ventive Ltd A cowl for a ventilation system
US20170016640A1 (en) * 2015-07-16 2017-01-19 Illinois Tool Works Inc. Extractor with segmented positive pressure airflow system
US9623506B2 (en) 2011-02-01 2017-04-18 Illinois Tool Works Inc. Fume extractor for welding applications
US20170307236A1 (en) * 2013-04-05 2017-10-26 Siang Teik Teoh Coaxial Ventilator
US9821351B2 (en) 2011-11-11 2017-11-21 Illinois Tool Works Inc. Welding fume extractor
US20170335853A1 (en) * 2014-10-27 2017-11-23 Les Entreprises De Developpement Durable Energie Solutions Et Associes Inc. Push-Pull Counter Flow Heat Exchanger
US9839948B2 (en) 2013-01-29 2017-12-12 Illinois Tool Works Inc. Fume evacuation system
US10242317B2 (en) 2014-11-25 2019-03-26 Illinois Tool Works Inc. System for estimating the amount and content of fumes
US10808953B2 (en) 2013-06-28 2020-10-20 Illinois Tool Works Inc. Airborne component extractor with baffled debris collection
US11014132B2 (en) 2015-07-16 2021-05-25 Illinois Tool Works Inc. Extractor with end-mounted positive pressure system
EP4446595A1 (en) * 2023-04-12 2024-10-16 Jaroslaw Wisniewski Double suction impeller

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630667C3 (de) * 1976-07-08 1982-01-07 Interliz Anstalt, Vaduz Lüftungsgerät
DE2713424C2 (de) * 1977-03-26 1986-02-20 Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld Einrichtung zur Beheizung und Belüftung von Räumen
DE2717735C2 (de) * 1977-04-21 1984-07-05 Esch, Heinrich, Dipl.-Ing., 7090 Ellwangen Turbo-Radiallüfter
FR2437580A1 (fr) * 1978-07-26 1980-04-25 Mercier Jean Appareil pour le conditionnement de l'air, notamment dans les locaux d'elevage
FR2644562A1 (fr) * 1989-03-16 1990-09-21 Aiat Aerotherme d'axe vertical du type assurant une distribution d'air en effet cyclone
NL2001925C2 (nl) * 2008-08-26 2010-03-11 Norbertus Johannes Fransiscus Schollen Luchttoevoereenheid en luchttoevoersysteem.
CN114810634B (zh) * 2022-04-18 2023-07-14 大牧人机械(胶州)有限公司 一种猪舍同型号永磁风机的智能控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1487828A (en) * 1922-10-14 1924-03-25 Ziganek Ferdinand Ventilator
US2595370A (en) * 1945-10-08 1952-05-06 Svenska Flaektfabriken Ab Arrangement for ventilating of railway carriages, buses and similar vehicles
US3199773A (en) * 1963-10-14 1965-08-10 Leo M Stirling Contra-flow ventilating apparatus
US3352224A (en) * 1966-01-14 1967-11-14 Vapor Corp Ventilating and air conditioning system for a passenger vehicle
US3401621A (en) * 1965-07-08 1968-09-17 Aaberg Carl Peter Noe Plant for ventilation of rooms, more particularly in stables

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA709260A (en) * 1965-05-11 Clarage Fan Company Fan equipment
DE543884C (de) * 1928-03-20 1932-02-11 Kurth & Co A G Vorrichtung zur zugfreien Verteilung eines Luftstromes in einem Raum
DE1104151B (de) * 1953-08-20 1961-04-06 Anemostat Raumlufttechnik G M Aus einer gewellten Platte aufgebauter Verteiler fuer Frischluftzufuehrung in Raeume

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1487828A (en) * 1922-10-14 1924-03-25 Ziganek Ferdinand Ventilator
US2595370A (en) * 1945-10-08 1952-05-06 Svenska Flaektfabriken Ab Arrangement for ventilating of railway carriages, buses and similar vehicles
US3199773A (en) * 1963-10-14 1965-08-10 Leo M Stirling Contra-flow ventilating apparatus
US3401621A (en) * 1965-07-08 1968-09-17 Aaberg Carl Peter Noe Plant for ventilation of rooms, more particularly in stables
US3352224A (en) * 1966-01-14 1967-11-14 Vapor Corp Ventilating and air conditioning system for a passenger vehicle

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722395A (en) * 1967-08-03 1973-03-27 G Courchesne Combined intake and exhaust ventilator
US3970408A (en) * 1967-10-26 1976-07-20 Bio-Medicus, Inc. Apparatus for use with delicate fluids
US3750557A (en) * 1970-11-16 1973-08-07 Nordisk Ventilator System for the ventilation of buildings
US3791279A (en) * 1971-07-06 1974-02-12 Nordisk Ventilator Damper unit for a ventilation system
US3830145A (en) * 1972-06-09 1974-08-20 Nordisk Ventilator Ventilation system
US3847065A (en) * 1972-06-09 1974-11-12 Nordisk Ventilator Ventilation system
US4344370A (en) * 1980-07-24 1982-08-17 Industrial Air, Inc. Apparatus for discharging exhaust gas at high velocity
US4506655A (en) * 1981-02-03 1985-03-26 Kuechler Irvin R Compact double fan apparatus and method with grease-separating capabilities
US4846261A (en) * 1987-11-05 1989-07-11 Karjasuo Oy Vacuum heat exchange apparatus for ventilation of buildings, in particularly of animal sheds
US5531566A (en) * 1994-08-24 1996-07-02 Societe Nationale D'etude Et De Construction De Moteurs D'aviation S.N.E.C.M.A. Self regulating bleed valve
US6632132B1 (en) * 1999-07-01 2003-10-14 Daikin Industries, Ltd. Tornado type intake and blowing device
EP1785675A1 (en) * 2005-11-11 2007-05-16 Monodraught Limited Ventilation arrangements
US20110171898A1 (en) * 2008-09-18 2011-07-14 Berling Gmbh Exhaust Hood
JP2012026616A (ja) * 2010-07-21 2012-02-09 Takasago Thermal Eng Co Ltd ルーフファンユニット及びルーフファンユニットの施工方法
US20120052792A1 (en) * 2010-08-31 2012-03-01 Broan-Nutone Llc. Ventilation Unit Calibration Apparatus, System and Method
US9638432B2 (en) * 2010-08-31 2017-05-02 Broan-Nutone Llc Ventilation unit calibration apparatus, system and method
US11141808B2 (en) 2011-02-01 2021-10-12 Illinois Tool Works Inc. Fume extractor for welding applications
US9623506B2 (en) 2011-02-01 2017-04-18 Illinois Tool Works Inc. Fume extractor for welding applications
US9821351B2 (en) 2011-11-11 2017-11-21 Illinois Tool Works Inc. Welding fume extractor
US9505042B2 (en) 2012-03-16 2016-11-29 Illinois Tool Works Inc. Airborne component extractor with improved power and pressure performance
US9498805B2 (en) 2012-03-16 2016-11-22 Illinois Tool Works Inc. Airborne component extractor with improved flow paths
US9505041B2 (en) 2012-03-16 2016-11-29 Illinois Tool Works Inc. Optimized airborne component extractor
US9468958B2 (en) 2012-03-16 2016-10-18 Illinois Tool Works Inc. Airborne component extractor with adjustable flow rates
US10603698B2 (en) * 2012-03-16 2020-03-31 Illinois Tool Works Inc. Airborne component extractor hood
US20130244559A1 (en) * 2012-03-16 2013-09-19 Illinois Tool Works Inc. Airborne component extractor manifold
US9604266B2 (en) * 2012-03-16 2017-03-28 Illinois Tool Works Inc. Airborne component extractor manifold
US20130244557A1 (en) * 2012-03-16 2013-09-19 Iiiinois Tool Works Inc. Airborne component extractor hood
US9839948B2 (en) 2013-01-29 2017-12-12 Illinois Tool Works Inc. Fume evacuation system
US11376642B2 (en) 2013-01-29 2022-07-05 Illinois Tool Works Inc. Fume evacuation system
US20170307236A1 (en) * 2013-04-05 2017-10-26 Siang Teik Teoh Coaxial Ventilator
US10436465B2 (en) * 2013-04-05 2019-10-08 Siang Teik Teoh Coaxial ventilator
US10808953B2 (en) 2013-06-28 2020-10-20 Illinois Tool Works Inc. Airborne component extractor with baffled debris collection
GB2528982A (en) * 2014-08-08 2016-02-10 Ventive Ltd A cowl for a ventilation system
US20160040898A1 (en) * 2014-08-08 2016-02-11 Ventive Limited Cowl for a ventilation system
GB2528982B (en) * 2014-08-08 2020-09-02 Ventive Ltd A cowl for a ventilation system
US20170335853A1 (en) * 2014-10-27 2017-11-23 Les Entreprises De Developpement Durable Energie Solutions Et Associes Inc. Push-Pull Counter Flow Heat Exchanger
US10570907B2 (en) * 2014-10-27 2020-02-25 Les Entreprises De Development Durable Energie Solutons Et Associes Inc. Push-pull counter flow heat exchanger
US10242317B2 (en) 2014-11-25 2019-03-26 Illinois Tool Works Inc. System for estimating the amount and content of fumes
US11014132B2 (en) 2015-07-16 2021-05-25 Illinois Tool Works Inc. Extractor with end-mounted positive pressure system
CN106345783B (zh) * 2015-07-16 2021-06-04 伊利诺斯工具制品有限公司 具有分段式正压空气流系统的抽出器
CN106345783A (zh) * 2015-07-16 2017-01-25 伊利诺斯工具制品有限公司 具有分段式正压空气流系统的抽出器
US20170016640A1 (en) * 2015-07-16 2017-01-19 Illinois Tool Works Inc. Extractor with segmented positive pressure airflow system
US11530826B2 (en) * 2015-07-16 2022-12-20 Illinois Tool Works Inc. Extractor with segmented positive pressure airflow system
US20230111903A1 (en) * 2015-07-16 2023-04-13 Illinois Tool Works Inc. Extractor with segmented positive pressure airflow system
US12398895B2 (en) * 2015-07-16 2025-08-26 Illinois Tool Works Inc. Extractor with segmented positive pressure airflow system
EP4446595A1 (en) * 2023-04-12 2024-10-16 Jaroslaw Wisniewski Double suction impeller

Also Published As

Publication number Publication date
NL6801279A (enrdf_load_stackoverflow) 1968-07-31
NL153307B (nl) 1977-05-16
CH497672A (de) 1970-10-15
FI47605B (enrdf_load_stackoverflow) 1973-10-01
NO119851B (enrdf_load_stackoverflow) 1970-07-13
CH485177A (de) 1970-01-31
FI47605C (fi) 1974-01-10
DE1628339B1 (de) 1972-02-03
SE318083B (enrdf_load_stackoverflow) 1969-12-01
FR1552555A (enrdf_load_stackoverflow) 1969-01-03

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