US3830145A - Ventilation system - Google Patents

Ventilation system Download PDF

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Publication number
US3830145A
US3830145A US00367939A US36793973A US3830145A US 3830145 A US3830145 A US 3830145A US 00367939 A US00367939 A US 00367939A US 36793973 A US36793973 A US 36793973A US 3830145 A US3830145 A US 3830145A
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US
United States
Prior art keywords
duct
ducts
ventilation system
layer
injection
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.)
Expired - Lifetime
Application number
US00367939A
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English (en)
Inventor
J Holt
C Videmark
P Christiansen
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.)
Novenco Building and Industry AS
Original Assignee
Nordisk Ventilator Co
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 Nordisk Ventilator Co filed Critical Nordisk Ventilator Co
Application granted granted Critical
Publication of US3830145A publication Critical patent/US3830145A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • 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

  • a ventilation system comprising ducts for injecting air [22] Filed: June 7, 1973 into and exhausting air from a room, said ducts extending side by side separated by a common partition [21] Appl 7939 which incorporates an opening between the ducts in which a damper member is arranged to be movable [30] Foreign Appli ti Prior-ityb t between two extreme positions, in one of which it J 9, 1972 D k 2921 72 closes the opening and in the other of which Positions une enmar it blocks both ducts and opens for full recirculation of 52 US.
  • the UNITED STATES PATENTS layer may have form of a liner member arranged on the inner side of the injection duct and extending also asson 3,463,391 8/1969 Haegans 0 0 98/33 R mm the exhaust duct' 3,487,767 1 1970 Kristiansen 98 33 R 7 Claims, 3 Drawing Figures PATENIEUAUBZOIHH saw 2 or 2 FIG. 2
  • the present invention relates to a ventilation system comprising a duct for the injection of fresh air and a duct for the exhaustion of air from a ventilated room, said ducts having walls of an insulating material and extending at least on part of their length side by side, separated by a common partition which incorporates an opening between the ducts, in which a damper member is arranged to be movable between two extreme positions, in one of which it closes the opening and in the other of which positions it blocks both ducts and opens for full recirculation of the air from the room back to the room through the injection duct.
  • Ventilation systems of this kind are used for the ventilation of, for example, stables or barns, and by means of said damper member which is adjustable between full supply of fresh air and full recirculation of return air from the ventilated room it is possible to adapt the ventilation according to the temperature conditions in the room. It is known to adjust the ventilation automatically by controlling the damper movement by means of a termostat controlled hydraulic motor, so that the damper member can occupy any position between the above-mentioned extreme positions.
  • a ventilation system comprising a duct for the injection of fresh air and a duct for the exhaustion of air from a ventilated room, said ducts having walls of an insulating material and extending at least on part of their length side by side, a common partition separating said ducts on said part of their length and incorporating an opening between the ducts, a damper member arranged in said opening to be movable between two extreme positions in one of which it closes the opening and in the other of which positions it blocks both ducts and opens for full recirculation of the air from the room back to the room through the injection duct and a layer of a material of high heat conductivity arranged on the inner side of the outer wall of the injection duct said layer extending from the level at which the damper member contacts the outer wall of the injection duct in the extreme position of the damper member in which both ducts are blocked.
  • the heat conducting layer in the injection duct will be contacted at least on the lower part thereof by a mixture of the hot return air from the ventilated room passing through the recirculation opening and the ambient air supplied through the injection duct, said air mixture having a considerably higher temperature than the ambient air.
  • the heat thus applied to the heat conducting layer is conveyed to the upper part of said layer which is located on the very place in the injection duct at which the risk for ice formations to occur is particularly pronounced, whereby the inner side of the outer wall of the injection duct on this place will attain a higher temperature, so that the risk for ice formations is materially reduced.
  • a further improved effect may be obtained by designing the heat conducting layer so as to extend into the exhaust duct. Thereby, the part of the layer located in the exhaust duct is contacted directly by the hot return air, so that a greater quantity of heat is supplied at this critical place.
  • FIG. 1 shows an embodiment of a ventilation system according to the invention
  • FIG. 2 is a cross-sectional view of the ventilation system in FIG. 1 taken along the line II-II, the damper member between the exhaust and injection duct being removed, and
  • FIG. 3 is a view corresponding to the sectional view in FIG. 2 of a modified embodiment.
  • FIG. 1 shows a ventilation system of the kinddescribed in copending US. Pat. application Ser. No.
  • connection section 3 The two concentric ventilation ducts of the fan section is connected through a connection section 3, the detailed construction of which is described in the above-mentioned U.S. Pat. application Ser. No. 268,955, with a twin-duct designated as a whole by the reference numeral 4 and comprising two substantially semi-cylindrical ducts 6 and 7 connected to the central duct and the outer annular duct of the fan section, respectively, and being separated by a common flat partition 5.
  • the twin-duct 4 extends from the ventilated room 1 through the over-lying part of the building and terminates above the roof 8 thereof in a roof hood 9, which is designed with separate air passages for connecting the ducts 6 and 7, respectively, with the ambient air.
  • the partition has an opening in which a control damper member 10 is arranged, said damper member being movable between two extreme positions in one of which the opening in the partition is closed, so that a complete supply of fresh air to room 1 is obtained, whereas in the other extreme position the damper member extends transversely of the ducts 6 and 7, whereby the supply of fresh air is blocked and complete recirculation of the exhaust air from duct 6 to duct 7 is established, such as described in the above-mentioned U.S. Pat. application Ser. No. 268,955.
  • twinduct 4 of the embodiment shown consists of a number of shorter duct sections l1, l2, l3 and 14 which only after arrival at the place of installation is assembled in extension of each other to form the complete twinduct.
  • a layer of a material of high heat conductivity is arranged on the inner side of the outer wall of the injection duct 7 in the duct section 13 which in the embodiment shown incorporates the damper member 10, said layer extending also into the exhaust duct 6.
  • said layer is constituted by a liner member 15 of metal plate, preferably aluminium plate, the upper edge of the part of said member located in the injection duct being situated at the level at which damper member 10 contacts the outer wall of the injection duct in the extreme position, in which it blocks ducts 6 and 7 and opens for recirculation from duct 6 to duct 7.
  • the liner member extends into exhaust duct 6, the upper edge of the part of the member located in said duct being situated at a lower level than the upper edge in the injection duct 7. Also the edge of liner member 15 facing the ventilated room 1 is obliquely cut, so that this lower edge is situated at a higher level in the injection duct than in the exhaust duct, the part of liner member 15 located in the injection duct having, however, a smaller area than the part located in exhaust duct 6.
  • the liner member 15 in the embodiment shown is subdivided by a symmetri plane, such as shown in FIG. 2, into two parts 15a and 15b, which are guided through slots 16 and 17 at opposite side edges of the part of partition 5 located in duct section 13. Due to this construction of the liner member installation may take place by introducing parts 15a and 15b into slots 16 and 17 before said part of partition 5 is arranged in duct section 13 the outer walls of which are provided with diametrically opposite grooves for the side edges of the partition.
  • liner member 15 By arranging liner member 15 in duct section 13 in the system shown in FIG. 1, the part of the liner member located in exhaust duct 6 will be contacted directly by the hot return air passing up through the exhaust duct, and the heat supplied will be conveyed through the heat conducting liner member to the very part of the injection duct 7 at which the risk for ice formations is particularly great, so that the inner side of the outer wall of the injection duct on this place attains a higher temperature at which said risk is materially reduced.
  • the embodiment shown in which the part of the liner member located in the injection duct 7 has a smaller area than the part located in exhaust duct 6 has the ef-- fect of concentrating the supplied quantity of heat on a smaller area, so that a further improved effect is obtained.
  • FIG. 3 is a view corresponding to the sectional view in FIG. 2 of a modified embodiment, in which the effect of liner member 15 has been further improved by bending the portions of the two parts 15a and 15b of the liner member located in exhaust duct 6 inwardly from the outer wall of the exhaust duct, so that both surfaces of the liner member are contacted by the hot air flowing up through exhaust duct.
  • the size and location of the liner member have, of course, to be chosen with due consideration to the fact that damper member 10 has to be able to occupy the abovementioned extreme position, in which it blocks ducts 6 and 7 and opens for recirculation of the return air from duct 6 into duct 7, so that the peripheral edge of damper member 10 in this position contacts the outer walls of ducts 6 and 7.
  • theproportiori of the inwardly bent parts of the liner member have to be chosen so as to prevent said parts from restricting the recirculation air flow from duct 6 into duct 7 in an undesired manner.
  • a ventilation system comprising a duct for the injection of fresh air and a duct for the exhaustion of air from a ventilated room, said ducts having walls of an insulating material and extending at least on part of their length side by side, a common partition separating said ducts on said part of their length and incorporating an opening between the ducts, a damper member arranged in said opening to be movable between two extreme positions in one of which it closes the opening and in the other of which positions it blocks both ducts and opens for full recirculation of the air from the room back to the room through the injection duct and a layer of a material of high heat conductivity arranged on the inner side of the outer wall of the injection duct, said layer extending from the level at which the damper member contacts the outer wall of the injection duct in the extreme position of the damper member in which both ducts are blocked.
  • said heat conducting layer is constituted by a liner member made of metal plate, preferably aluminum plate.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Air-Flow Control Members (AREA)
US00367939A 1972-06-09 1973-06-07 Ventilation system Expired - Lifetime US3830145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK292172AA DK142509B (da) 1972-06-09 1972-06-09 Ventilationsanlæg.

Publications (1)

Publication Number Publication Date
US3830145A true US3830145A (en) 1974-08-20

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ID=8117149

Family Applications (1)

Application Number Title Priority Date Filing Date
US00367939A Expired - Lifetime US3830145A (en) 1972-06-09 1973-06-07 Ventilation system

Country Status (6)

Country Link
US (1) US3830145A (it)
CA (1) CA970206A (it)
DE (1) DE2329108C2 (it)
DK (1) DK142509B (it)
NL (1) NL7308034A (it)
SE (1) SE389726B (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941185A (en) * 1974-01-21 1976-03-02 Henning Erik E Heat accumulator
US4489881A (en) * 1984-01-30 1984-12-25 Tempmaster Corporation Air delivery system for hospital rooms and the like
FR2964448A1 (fr) * 2010-09-07 2012-03-09 4E Installation de ventilation, notamment de batiment d'elevage.
GB2510555A (en) * 2012-11-28 2014-08-13 Building Product Design Ltd Passive ventilation device with heat recovery mode
US11191255B2 (en) * 2016-10-21 2021-12-07 New Hope Liuhe Feed Co., Ltd. Premixed ventilated henhouse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732027A (en) * 1950-12-13 1956-01-24 Svenska Flaektfabriken Ab Ventilating apparatus with heat
US3122307A (en) * 1961-08-08 1964-02-25 Clarage Fan Company Fan equipment
US3463391A (en) * 1967-04-26 1969-08-26 Big Dutchman Intern Ag Air duct assembly,particularly for a stable or the like
US3487767A (en) * 1967-01-30 1970-01-06 Nordisk Ventilator Fan for the ventilation of buildings,e.g.,stables
US3750557A (en) * 1970-11-16 1973-08-07 Nordisk Ventilator System for the ventilation of buildings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732027A (en) * 1950-12-13 1956-01-24 Svenska Flaektfabriken Ab Ventilating apparatus with heat
US3122307A (en) * 1961-08-08 1964-02-25 Clarage Fan Company Fan equipment
US3487767A (en) * 1967-01-30 1970-01-06 Nordisk Ventilator Fan for the ventilation of buildings,e.g.,stables
US3463391A (en) * 1967-04-26 1969-08-26 Big Dutchman Intern Ag Air duct assembly,particularly for a stable or the like
US3750557A (en) * 1970-11-16 1973-08-07 Nordisk Ventilator System for the ventilation of buildings

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941185A (en) * 1974-01-21 1976-03-02 Henning Erik E Heat accumulator
US4489881A (en) * 1984-01-30 1984-12-25 Tempmaster Corporation Air delivery system for hospital rooms and the like
FR2964448A1 (fr) * 2010-09-07 2012-03-09 4E Installation de ventilation, notamment de batiment d'elevage.
GB2510555A (en) * 2012-11-28 2014-08-13 Building Product Design Ltd Passive ventilation device with heat recovery mode
GB2510555B (en) * 2012-11-28 2018-10-24 Building Product Design Ltd Ventilation device with heat recovery mode
US11191255B2 (en) * 2016-10-21 2021-12-07 New Hope Liuhe Feed Co., Ltd. Premixed ventilated henhouse

Also Published As

Publication number Publication date
SE389726B (sv) 1976-11-15
DK142509C (it) 1981-06-29
NL7308034A (it) 1973-12-11
DE2329108C2 (de) 1982-10-28
DE2329108A1 (de) 1973-12-20
DK142509B (da) 1980-11-10
CA970206A (en) 1975-07-01

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