US3395966A - Combustion apparatus - Google Patents

Combustion apparatus Download PDF

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Publication number
US3395966A
US3395966A US641282A US64128267A US3395966A US 3395966 A US3395966 A US 3395966A US 641282 A US641282 A US 641282A US 64128267 A US64128267 A US 64128267A US 3395966 A US3395966 A US 3395966A
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US
United States
Prior art keywords
leakage
chamber
combustion
duct
gas
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
US641282A
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English (en)
Inventor
Olsson Karl Borje
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.)
MARECK NV
KARL BORIE OLSSON
Original Assignee
Karl Borie Olsson
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
Priority claimed from NL6607422A external-priority patent/NL6607422A/xx
Application filed by Karl Borie Olsson filed Critical Karl Borie Olsson
Application granted granted Critical
Publication of US3395966A publication Critical patent/US3395966A/en
Assigned to MARECK HOLDING N.V. reassignment MARECK HOLDING N.V. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OLSSON, KARL B.
Assigned to MARECK N.V. reassignment MARECK N.V. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: 09-04-80 Assignors: MARECK HOLDING N.V.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C15/00—Apparatus in which combustion takes place in pulses influenced by acoustic resonance in a gas mass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2239/00—Fuels
    • F23N2239/06—Liquid fuels

Definitions

  • ABSTRACT OF THE DISCLOSURE Combustion apparatus in which a mixture of air and fuel is sucked through an inlet system to a combustion chamber and the combustion gases leave through an exhaust duct at super-atmospheric pressure.
  • a gas leakage duct surrounds the exhaust duct to form a leakage collecting chamber which through a conduit is connected to the inlet system and a pressure responsive member actuating an alarm device and/or a member for stopping the apparatus when gas leakage occurs.
  • the present invention relates to combustion apparatus in which a mixture of fuel and air is sucked through an inlet to a combustion chamber, from which the gases are exhausted at a super-atmospheric pressure through an exhaust duct.
  • the general object of the invention is to provide simple means which indicate such leakage or stop tne combustion apparatus when such leakage of exhaust gases possibly would occur.
  • the combustion apparatus is characterized in that the exhaust duct is enclosed in a collecting duct forming a gas leakage chamber which through a conduit is connected with the inlet system of the apparatus at a place where vacuum is prevailing and with a member responsive to changes in the gas pressure in said conduit due to leakage in the exhaust duct.
  • the gas pressure responsive member may upon leakage actuate an alarm device such as a lamp or ringing bell and/or may actuate any control member for the air or fuel supply to the apparatus or the electric ignition system, if such is employed, so as to stop the operation of the combustion apparatus.
  • FIG. 1 is a partially sectioned elevational view of the combustion apparatus, having a first and second combustion chamber.
  • FIG. 2 is a diagrammatic section of a boiler in which the apparatus according to the invention is employed as a heating source and at the bottom of which is provided a cylindrical container forming an expansion chamber for the exhaust gases from the apparatus.
  • FIG. 3 is a diagrammatic cross sectional view of the boiler in FIG. 2.
  • FIG. 4 is a diagram of an automatic control system which includes a device for stopping the operation of the apparatus when exhaust gas leakage occurs.
  • the combustion apparatus has an inlet 20, a first and second combustion chamber 21 and 22, respectively, and an outlet 23 to which an exhaust duct 24, 25 (FIG. 2) is connected.
  • a socket supporting a coaxial electric heating wire coil 27 which is employed as an ignition member for starting the apparatus.
  • the electric wires to the coil are diagrammatically indicated by 28.
  • This coil 28 is merely switched on for heating purposes during a starting period of maximum a few minutes.
  • FIG. 1 A further detail to be noted in FIG. 1 is a conduit 29 which is connected to the inlet 20 but may be connected to any other place which is at sub-atmospheric pressure due to the suction in the inlet 20 upon operation of the apparatus.
  • This vacuum conduit will be explained below.
  • the apparatus in FIG. 1 may be used for heating water in a boiler 30.
  • the exhaust duct 24 from the apparatus is connected to an expansion chamber 31.
  • This expansion chamber is cylindrical as shown in FIGS. 2 and 3.
  • the end portion 32 of the exhaust duct has a greater diameter than the duct 24 to form an end piece which extends substantially tangentially through the wall 33 of the chamber 31 and has its end located near to or in a plane at right angles to the tangential direction and through the central axis of the chamber 31.
  • the pulses generate an alternating positive and negative pressure.
  • the muffler 34 may have a small size.
  • the gases enter the muffler through a region of small holes at the left end 35 of the muffler and leave the mufiier through the exhaust duct 25 surrounded by the leakage collecting duct 2511.
  • This duct communicates through holes with the leakage collecting space below the cylinder 33, which space is closed by transverse walls 36, above which is water, and a half cylindrical shell 37.
  • the mufiler may be located coaxially after the cylindrical chamber 31 and is then preferably of an axial through-flow type.
  • FIG. 4 illustrates a preferred circuit including control members such as a switch 38 with a switch lever 39 resting in closed position on a bimetallic spring 40 heated by a wire 41 upon starting the apparatus. After a predetermined period the bimetallic spring 40 will be in a position releasing the lever 39.
  • control members such as a switch 38 with a switch lever 39 resting in closed position on a bimetallic spring 40 heated by a wire 41 upon starting the apparatus. After a predetermined period the bimetallic spring 40 will be in a position releasing the lever 39.
  • the transformer of the circuit is denoted by 42.
  • the heating wire coil 27 is through the wires 28 connected to the transformer 42 as shown.
  • a thermostat 43 and an electrically driven fuel pump 44 or electromagnetic valve and a switch 45 are also included in the circuit.
  • the thermostat 38 will connect the circuit to the net line 46 when the temperature of the medium to be heated falls to a certain value, and Will disconnect the circuit when the temperature has increased to a certain value. At the same time the pump 44 is started or stopped, respectively.
  • the switch 45 has a lever 47 actuated by a pneumatic bellows 48 which through conduit 29 is connected to receive vacuum from the inlet 20 and is further connected through a conduit 49 with the semi-circular leakage receiving chamber 37 located below the expansion chamber 31 in FIG. 3, said leakage chamber communicating with the leakage conduit 25a surrounding the exhaust duct 25.
  • a pneumatic bellows 48 which through conduit 29 is connected to receive vacuum from the inlet 20 and is further connected through a conduit 49 with the semi-circular leakage receiving chamber 37 located below the expansion chamber 31 in FIG. 3, said leakage chamber communicating with the leakage conduit 25a surrounding the exhaust duct 25.
  • conduits 29, 49, 37, 25a and the bellows 48 form a simple and reliable guard for stopping the apparatus upon leakage in the exhaust gas system.
  • conduit 29 must not be connected directly to the inlet 20 but may be conneced to any other place in the inlet system such as the air cleaner where a subatmospheric air pressure is prevailing dut to the suction in the inlet 20.
  • a combustion apparatus for a mixture of air and fuel comprising a casing (30) for enclosing the combustion apparatus;
  • a gas pressure-responsive member having a closed chamber (48) connected by said conduit means with said gas-collecting outer duct (25a), said chamber 48 having a movable wall which is moved in response to changes in the gas pressure in said conduit means due to leakage of exhaust gases into said gas-collecting outer duct.
  • a combustion apparatus which includes a fuel supply pump, and in which the drive of the apparatus is controlled by electric components including an electric motor for driving said fuel supply pump, the electric components being connectable to a source of electric current by means of a switch which is operable by said gas pressure responsive member to disconnect the electric current source when gas leakage occurs in said outer gas collecting duct.
  • a bimetallic operated switch is provided to be influenced by an electric heating current during the starting period for a predetermined period which results in that the bimetallic operated switch is actuated to disconnect the voltage to the igniting wire after said predetermined period.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US641282A 1966-05-27 1967-05-25 Combustion apparatus Expired - Lifetime US3395966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6607422A NL6607422A (xx) 1965-06-04 1966-05-27

Publications (1)

Publication Number Publication Date
US3395966A true US3395966A (en) 1968-08-06

Family

ID=19796728

Family Applications (1)

Application Number Title Priority Date Filing Date
US641282A Expired - Lifetime US3395966A (en) 1966-05-27 1967-05-25 Combustion apparatus

Country Status (3)

Country Link
US (1) US3395966A (xx)
BE (1) BE699105A (xx)
NO (1) NO116332B (xx)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192986A (en) * 1962-11-10 1965-07-06 Junkers & Co Pulse jet burner
US3267985A (en) * 1964-03-12 1966-08-23 John A Kitchen Pulse combustion apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192986A (en) * 1962-11-10 1965-07-06 Junkers & Co Pulse jet burner
US3267985A (en) * 1964-03-12 1966-08-23 John A Kitchen Pulse combustion apparatus

Also Published As

Publication number Publication date
NO116332B (xx) 1969-03-10
BE699105A (xx) 1967-11-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MARECK HOLDING N.V.; HANDELSKADE 8, WILLEMSTAD, CU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:OLSSON, KARL B.;REEL/FRAME:003927/0173

Effective date: 19811117

AS Assignment

Owner name: MARECK N.V.

Free format text: CHANGE OF NAME;ASSIGNOR:MARECK HOLDING N.V.;REEL/FRAME:003957/0393

Effective date: 19820105