US3510059A - Automatic flue damper - Google Patents

Automatic flue damper Download PDF

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Publication number
US3510059A
US3510059A US722878A US72287868A US3510059A US 3510059 A US3510059 A US 3510059A US 722878 A US722878 A US 722878A US 72287868 A US72287868 A US 72287868A US 3510059 A US3510059 A US 3510059A
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US
United States
Prior art keywords
damper
section
conduit
flue
strip
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Expired - Lifetime
Application number
US722878A
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English (en)
Inventor
Alphons Diermayer
Luitpold Kutzner
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Individual
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Individual
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Publication date
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Publication of US3510059A publication Critical patent/US3510059A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/04—Regulating air supply or draught by operation of single valves or dampers by temperature sensitive elements
    • F23N3/047—Regulating air supply or draught by operation of single valves or dampers by temperature sensitive elements using mechanical means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
    • G05D23/08—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature with bimetallic element

Definitions

  • the flow section of the passage is approximately proportional to (l-cos a), wherein u is the angle of overall deflection of the strip, as measured between the aforementioned common plane and a line connecting the fixed and free edges of the strip.
  • u is the angle of overall deflection of the strip, as measured between the aforementioned common plane and a line connecting the fixed and free edges of the strip.
  • a primary object of the instant invention is a modification of our earlier flue damper in which the effective flow section of a flue duct increases rapidly from a minimum value in response to a temperature increase in the flue gases.
  • the passage of a flue conduit is divided into several sections by partitions which extend in a direction from the axis of the conduit to the latter in angularly offset relationship.
  • the axial walls bounding each section are thus constituted by two partitions and a circumferential portion of the conduit.
  • a damper section arranged in each section of the flue passage includes elongated, transversely juxtaposed strips of laminated, bi-metallic material which extend substantially in a common plane transverse of the conduit axis when cold and define longitudinal slots therebetween.
  • One of the narrow edges of each strip is fixedly fastened to one wall of the corresponding passage section and the other narrow edge is free to move about the fixed portion in response to temperature change.
  • One strip in each passage section has a longitudinal edge closely juxtaposed 3,510,059 Patented May 5, 1970 to one of the partitions and is approximately parallel thereto.
  • each strip is fastened to the other partition.
  • a flow passage opens between the aforementioned longitudinal edge and the closely juxtaposed partition at a rate approximately proportional to the increase in the angle of deflection.
  • FIG. 1 shows a fine damper arrangement of the invention in top plan view
  • FIG. 2 illustrates the arrangement of FIG. 1 in elevational section on the line IIII.
  • the flue damper arrangement illustrated includes a short, cylindrical sheet metal tube 1 which may be fitted into a flue conduit or constitute an axial portion of that conduit.
  • Each section 3 is made of an initially rectangular piece of bi-metallic sheet material by rounding off one corner of the sheet in an arc having the same radius as the tube 1, and thereafter cutting three slots 4 into the sheet parallel to one of the remaining straight edges and transverse to the arcuate edge. Some of the slots are open in the arcuate edge, but all terminate short of the other straight edge.
  • the sheet is thus partly divided into four strips of increasing length 5, 5a, 5b, 50 connected at one of their narrow edge portions which are bent upwardly and fixedly attached to one of the partitions 2.
  • the longest strip 50 has a longitudinal edge closely juxtaposed and approximately parallel to the other associated partition 2.
  • the main portions of the strips -5, 5a, 5b, 50' extend in a common plane perpendicular to the axis of the tube 1 and obstruct most of the flow section of the tube 1, only the slots 4 and similar narrow openings along the partitions 2 being available for passing the combustion gases produced by a pilot flame if the damper is used on a conventional gas-fired heater, and for providing minimal draft when the gas burner starts.
  • the free ends of the strips 5, 5a, 5b, 5c abut from below against the tube 1.
  • a gap 7 opens between the free narrow edge of each strip and the tube 1 or a non-illustrated further portion of the flue conduit along the circular circumference of the tube 1 or the conduit.
  • the flow section of the gap 7 is approximately proportional to (l-cos a), as discussed above if the non-illustrated conduit is axially aligned with the tube 1.
  • the lower edges of the partitions 2 are located in the aforementioned common plane of the cold strips 5, 5a, 5b, 50.
  • a gap 6 is opened between the lower edge of the adjacent partition 2 and the longitudinal edge of the strip 5c as the free end of the strip 50 moves axially away from the partition.
  • the flow section of the gap 6 is approximately triangular and directly proportional to the value of the deflection angle 0:. It therefore grows much faster than the gap 7 as long as the angle of deflection is small,'and the damper opens quickly.
  • damper sections 3 can be prepared from bi-metallic sheet metal in a particularly simple manner. It is advantageous from an economic point of view to have the several sections of the conduit passage and of the damper plate identical in size and shape. However, if special conditions should so require, the passage through the conduit may be divided into fewer or more sections than have been illustrated and described, and the shape of each damper section may be different from that of any other section.
  • damper plate means of laminated metallic material having two sheet layers of substantially different coeflicient of thermal expansion secured in said conduit for movement between a conduit opening and a conduit closing position in response to temperature change of a fluid in the conduit the improvement which comprises:
  • each partition having a first 4 face in one contiguously adjacent section and a second face in another contiguously adjacent section, the axial walls of each section being constituted by a first face of one of two partitions, a second face of the other one of said two partitions, and a circumferential portion of said conduit;
  • said plate means including a plurality of damper plate sections having respective first edge portions fixedly fastened to said first faces in said passage sections, and second edge portions remote from said first edge portions and free for angular movement about the associated first edge portions when the damper plate means move between said positions thereof.
  • each damper plate section being formed with a plurality of slots extending in a direction from said first edge portion toward said second edge portion and defining therebetween strip portions of said damper plate section elongated in said direction, one of said strip portions being closely juxtaposed to said second face in the corresponding passage section and substantially parallel to said second face.
  • said circumferential portion being of substantially circular cross section in a plane perpendicular to said axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Exhaust Silencers (AREA)
  • Lift Valve (AREA)
  • Air Supply (AREA)
US722878A 1967-04-26 1968-04-22 Automatic flue damper Expired - Lifetime US3510059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0052932 1967-04-26

Publications (1)

Publication Number Publication Date
US3510059A true US3510059A (en) 1970-05-05

Family

ID=7054572

Family Applications (1)

Application Number Title Priority Date Filing Date
US722878A Expired - Lifetime US3510059A (en) 1967-04-26 1968-04-22 Automatic flue damper

Country Status (5)

Country Link
US (1) US3510059A (fr)
AT (1) AT273427B (fr)
BE (1) BE713058A (fr)
DE (1) DE1679638B1 (fr)
NL (1) NL154584B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866594A (en) * 1973-02-26 1975-02-18 Luitpold Kutzner Gas fired heating installation
FR2304861A1 (fr) * 1975-03-19 1976-10-15 Diermayer Werner Foyer fonctionnant au gaz, muni d'un clapet de type bilame, dans le canal d'evacuation des gaz brules
US4141495A (en) * 1977-06-02 1979-02-27 Werner Diermayer Draft control arrangement for combustion apparatus
US4272013A (en) * 1979-05-23 1981-06-09 Werner Diermayer Vent control arrangement for combustion apparatus
US4294401A (en) * 1977-09-08 1981-10-13 Werner Diermayer Draft control arrangement
US4434781A (en) 1982-02-04 1984-03-06 Walter Koziol Thermally efficient barbecue grill
US20100107993A1 (en) * 2008-10-30 2010-05-06 American Water Hater Company Energy efficient induced air gas water heater

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647566A1 (fr) * 1989-05-23 1990-11-30 Al Sabagh Abdulrahman Dispositif d'aeration automodulaire destine a regulariser la temperature dans une enceinte

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3228605A (en) * 1964-03-23 1966-01-11 Diermayer Alphons Automatic flue damper

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1254313A (en) * 1968-05-03 1971-11-17 Unilever Ltd Dried milk products

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3228605A (en) * 1964-03-23 1966-01-11 Diermayer Alphons Automatic flue damper

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866594A (en) * 1973-02-26 1975-02-18 Luitpold Kutzner Gas fired heating installation
FR2304861A1 (fr) * 1975-03-19 1976-10-15 Diermayer Werner Foyer fonctionnant au gaz, muni d'un clapet de type bilame, dans le canal d'evacuation des gaz brules
US4141495A (en) * 1977-06-02 1979-02-27 Werner Diermayer Draft control arrangement for combustion apparatus
US4294401A (en) * 1977-09-08 1981-10-13 Werner Diermayer Draft control arrangement
US4272013A (en) * 1979-05-23 1981-06-09 Werner Diermayer Vent control arrangement for combustion apparatus
US4434781A (en) 1982-02-04 1984-03-06 Walter Koziol Thermally efficient barbecue grill
US20100107993A1 (en) * 2008-10-30 2010-05-06 American Water Hater Company Energy efficient induced air gas water heater

Also Published As

Publication number Publication date
NL154584B (nl) 1977-09-15
AT273427B (de) 1969-08-11
BE713058A (fr) 1968-08-16
DE1679638B1 (de) 1969-10-16
NL6805812A (nl) 1968-10-28

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