US3800686A - Air supply and exhaust duct system in a building - Google Patents

Air supply and exhaust duct system in a building Download PDF

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Publication number
US3800686A
US3800686A US00284755A US3800686DA US3800686A US 3800686 A US3800686 A US 3800686A US 00284755 A US00284755 A US 00284755A US 3800686D A US3800686D A US 3800686DA US 3800686 A US3800686 A US 3800686A
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United States
Prior art keywords
building
duct
combustion
pipe
air
Prior art date
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Expired - Lifetime
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US00284755A
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English (en)
Inventor
K Otsuka
T Katayama
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Tokyo Gas Co Ltd
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Tokyo Gas Co Ltd
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Publication date
Application filed by Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
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Publication of US3800686A publication Critical patent/US3800686A/en
Anticipated expiration legal-status Critical
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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
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation

Definitions

  • ABSTRACT Air supply and exhaust duct system for a combustion apparatus having upper and a lower parallel ducts passing horizontally through a building at the upper and the lower part thereof and a vertical duct connecting the upper and lower horizontal ducts within the building and having an I shape structure.
  • the present invention relates to an air supply and exhaust duct system for a combustion apparatus which is used in a multistoried building or a skyscraper.
  • combustion systems have several benefits. First, they dont pollute air within a the room, and secondly they are quite safe in use and do not cause, fires. Consequently there are many kinds of combustion apparatus of this type using oil or gas as fuel.
  • the system has disadvantages however.
  • a multi-storied building or a skyscraper is apt to be influenced by wind pressure, which has an adverse influence on combustion apparatus.
  • the prior art duct shown in FIG. 2 is provided with a horizontal duct L at the lower part of a building which passes through the building and a vertical duct P thereon, in which the inlet and the exhaust port of the closed type combustion apparatus 7 are so designed as to burn air supplied through the lower horizontal duct L in the vertical duct and exhaust the exhaust gas into the vertical duct P and then from the top thereof into the open air.
  • the inlet port of the lower horizontal duct L, through which air is supplied, and the top of the vertical duct P are situated far apart and particularly in a multistoried building where the lower horizontal duct L is far away from the top of the vertical duct P, there is a big difference between the Wind pressures, which may adversely effectthe combustion of the apparatus.
  • Another defect of this type of duct system is that the amount of usable building space is diminished enlargement of the crosssectional area of the duct as the number of stories of the building increases.
  • FIG. 3 illustrates a second type of prior art duct, where air inlet and exhaust ports are provided on the roof of the building, and U-sha'pe duct X is constructed within the building so as to expose the inlet and exhaust ports of the closed type combustion apparatus in said duct like the first described duct.
  • the second duct is less influenced by wind pressure than the first described duct is, but it has the same shortcomings in that the cross-sectional area of the duct must be enlarged proportionally to the number of floors of the building.
  • the present invention is proposed to overcome the defects of the above described prior art ducts, and the following will be its objects.
  • the first object of the present invention is to propose an air supply and exhaust duct'system which is least influenced by wind pressure.
  • the second object of the present invention is to control the proportional enlargement of the cross-sectional area of the duct to the number of stories of the build ing.
  • FIG. 1 shows an embodiment of the present invention, where an I-shape duct consisting of an upper and a lower horizontal duct and a vertical duct is provided on each block consisting of several stories of a' highstoried building.
  • FIG. 2 illustrates a prior art duct.
  • FIG. 3 is a view of a second type of prior art duct.
  • I-shape duct provided on each block, a, b, 0, consisting of seven sto- -ries of the multistoried building, which I-s hape duct is constituted as follows.
  • Upper horizontal duct 5 and the lower horizontal duct 4 pass through the building and the vertical duct 6 connects the upper horizontal duct 5 and the lower horizontal duct 4 within the building.
  • A-A' show the open parts of the upper horizontal duct 5
  • B-B' show the open parts of the lower horizontal duct 4.
  • a fan may be attached in order to generate an ascending air current within the duct 6.
  • Reference numeral 7 denotes a closed type combustion apparatus, whose inlet and exhaust ports are exposed respectively inside the vertical duct 6.
  • the air for combustion may be supplied forcibly by fan or through a widened pipeline naturally due to pressure differential.
  • the closed type combustion apparatus are used for boilers, ranges and stoves and so on at present, as described above.
  • the embodiment mentioned above is the one in which an I-shape duct system is constructed on each block consisting of several stories of a high-stories building. In such a case, it is also considered that the I-shape duct is constructed on every floor. in which the cross-sectional area of the bust can be small.
  • Each closed type combustion apparatus 7 is supplied 7 with air for combustion through the vertical duct 6 and exhausts the exhaust gas of combustion into the vertical duct 6. According to the temperature of the exhausted gas, an ascending air current is generated in the vertical duct 6, and it is exhausted from the open part of the upper horizontal duct 5, A or A into the open air.
  • a fan may be attached in the vertical duct 6 or in the upper horizontal duct 5, by which an ascending air current may be generated.
  • the present invention comprises an l-shape duct system consisting of the upper horizontal duct 5 and the lower horizontal duct 4 and a vertical duct 6 connecting said ducts, in which wind pressure has'no influences in the vertical duct.
  • Each apparatus 7 is able to maintain stable combustion with no influence of wind pressure on combustion.
  • a combustion apparatus located within said building and operatively connected to said vertical pipe, whereby air is supplied to said apparatus from said first horizontal pipe and gases of combustion are exhausted from said apparatus into said vertical pipe, thereby creating an ascending air current whereby said gas of combustion are carried to said second horizontal pipe and exhausted therefrom.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
US00284755A 1972-03-28 1972-08-29 Air supply and exhaust duct system in a building Expired - Lifetime US3800686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47031016A JPS4919647A (enrdf_load_stackoverflow) 1972-03-28 1972-03-28

Publications (1)

Publication Number Publication Date
US3800686A true US3800686A (en) 1974-04-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00284755A Expired - Lifetime US3800686A (en) 1972-03-28 1972-08-29 Air supply and exhaust duct system in a building

Country Status (3)

Country Link
US (1) US3800686A (enrdf_load_stackoverflow)
JP (1) JPS4919647A (enrdf_load_stackoverflow)
CA (1) CA979271A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT392990B (de) * 1986-12-24 1991-07-25 Escher Wyss Gmbh Verfahren und vorrichtung zur mechanisch- thermischen entwaesserung einer faserstoffbahn
US5160294A (en) * 1991-03-25 1992-11-03 Pentwater Wire Products, Inc. Spacer rack for smoke detection
US5246397A (en) * 1991-03-25 1993-09-21 Pentwater Wire Products, Inc. Spacer rack for smoke detecton having separable sections

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59189028U (ja) * 1983-06-02 1984-12-14 大下　一義 加圧ダクト
JPS60128251U (ja) * 1984-02-03 1985-08-28 大下　一義 加圧ダクト
US4927971A (en) * 1988-05-11 1990-05-22 Mitsubishi Paper Mills Ltd. Desensitizer composition

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US52528A (en) * 1866-02-13 Improved system of ventilating houses
US533454A (en) * 1895-02-05 Heating and ventilating apparatus
US802871A (en) * 1903-03-09 1905-10-24 Frederick V Matton Ventilating device for buildings.
US960921A (en) * 1908-07-10 1910-06-07 David Hill Ventilating apparatus.
US1814979A (en) * 1929-04-18 1931-07-14 Kerr Chickeries Inc Combination chick storage, brooder and incubator
US3354946A (en) * 1965-07-30 1967-11-28 Tempmaster Corp Air conditioning system
US3380369A (en) * 1965-02-23 1968-04-30 Allander Claes Gustaf System for ventilating clean rooms

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US52528A (en) * 1866-02-13 Improved system of ventilating houses
US533454A (en) * 1895-02-05 Heating and ventilating apparatus
US802871A (en) * 1903-03-09 1905-10-24 Frederick V Matton Ventilating device for buildings.
US960921A (en) * 1908-07-10 1910-06-07 David Hill Ventilating apparatus.
US1814979A (en) * 1929-04-18 1931-07-14 Kerr Chickeries Inc Combination chick storage, brooder and incubator
US3380369A (en) * 1965-02-23 1968-04-30 Allander Claes Gustaf System for ventilating clean rooms
US3354946A (en) * 1965-07-30 1967-11-28 Tempmaster Corp Air conditioning system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT392990B (de) * 1986-12-24 1991-07-25 Escher Wyss Gmbh Verfahren und vorrichtung zur mechanisch- thermischen entwaesserung einer faserstoffbahn
US5160294A (en) * 1991-03-25 1992-11-03 Pentwater Wire Products, Inc. Spacer rack for smoke detection
US5246397A (en) * 1991-03-25 1993-09-21 Pentwater Wire Products, Inc. Spacer rack for smoke detecton having separable sections

Also Published As

Publication number Publication date
JPS4919647A (enrdf_load_stackoverflow) 1974-02-21
CA979271A (en) 1975-12-09

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