[go: up one dir, main page]

US20120240916A1 - Multiple Barrel Forced Air Heater - Google Patents

Multiple Barrel Forced Air Heater Download PDF

Info

Publication number
US20120240916A1
US20120240916A1 US13/240,352 US201113240352A US2012240916A1 US 20120240916 A1 US20120240916 A1 US 20120240916A1 US 201113240352 A US201113240352 A US 201113240352A US 2012240916 A1 US2012240916 A1 US 2012240916A1
Authority
US
United States
Prior art keywords
fuel
air
heater
producing
air flow
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.)
Abandoned
Application number
US13/240,352
Other languages
English (en)
Inventor
Timothy Jedrzejek
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.)
Enerco Group Inc
Original Assignee
Enerco Group Inc
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 Enerco Group Inc filed Critical Enerco Group Inc
Priority to US13/240,352 priority Critical patent/US20120240916A1/en
Priority to PCT/US2011/053008 priority patent/WO2012040590A2/fr
Assigned to ENERCO GROUP, INC. reassignment ENERCO GROUP, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JEDRZEJEK, TIMOTHY, MR.
Publication of US20120240916A1 publication Critical patent/US20120240916A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • 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
    • F23D11/001—Spraying nozzle combined with forced draft fan in one unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/28—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D23/00—Assemblies of two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0488—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F24H9/2085—Arrangement or mounting of control or safety devices for air heaters using fluid fuel
    • 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]

Definitions

  • the present invention relates generally to heaters and, in particular, a new arrangement for a forced-air portable heater.
  • Portable, forced-air, gas or liquid (such as kerosene) heaters are well-known.
  • One type of portable heater for commercial use draws air into the heater and forces the air through or proximate to a flame. As the air passes through or proximate to the flame, it is heated and output into a room or other structure which is intended to be heated.
  • This type of portable heater is referred to as a forced-air and/or direct-fired heater.
  • part of the product of the combustion is output into the room or the structure to be heated.
  • a forced-air heaters may utilize an elongated substantially cylindrical “barrel” housing. Within the barrel housing may be mounted a means for moving the air and a combustion system.
  • the means for moving the air may consist of a fan attached to an electric motor.
  • the motor and fan blow air over the combustion system.
  • the combustion system is designed to burn a fuel.
  • Some forced-air heaters comprise a control circuit adapted to mix fuel and air, at some ratio, into an air-fuel mixture.
  • the air-fuel mixture is ignited at the combustion system.
  • Air may be drawn in by a fan at an inlet or first end of a housing, heated as it passes over the combustion system or and mixes with output from the combustion system, and exits through an outlet or second end of the housing.
  • the shape and efficiency of the combustion system may differ greatly among various heaters. Most portable direct-fired heaters run at maximum output and are usually designed to produce constant heat while on.
  • portable kerosene heaters may be mounted on a trailer or chassis which also serves, at least in part, as the fuel tank.
  • the fuel tank may be below the fuel distribution, igniter and combustion areas of the heater.
  • Some means may be provided for moving the fuel into the combustion region, as well as atomizing and metering the fuel to the igniter in controlled amounts.
  • Means for moving fuel may comprise a Venturi system or a pump. Whatever the heat output of the heater system, the heat output rate demands a commensurate amount of fuel input. In some systems, a Venturi system may be insufficient to provide the needed fuel input requirements for very high heat output. Some very high heat output systems, for example systems adapted to provide more than 250,000 BTU, use a pump to supply fuel. It remains desirable to develop a forced air heater adapted to supply very high heat output without requiring a pump.
  • the present subject matter comprises a heater having a multiple barrel cylindrical combustion system, side-by-side or on top of one another, that produces more heat output than the output of a single barrel cylindrical heater.
  • a portable heater it may be utilized by any type of forced-air heater.
  • a multiple barrel forced-air heater comprising a base, a first heater jacket, and a second heater jacket.
  • the base may comprise a fuel tank adapted to accept a fuel.
  • the first heater jacket may comprise a first device for producing a first air flow, a first Venturi adapted to mix some of the fuel with the first air flow to form a first fuel-air mixture, and a first combustion site adapted to combust the first fuel-air mixture to generate a first amount of heat and a first amount of combustion products.
  • the second heater jacket may comprise a second device for producing a first air flow, a second Venturi adapted to mix some of the fuel with the second air flow to form a second fuel-air mixture, and a second combustion site adapted to combust the second fuel-air mixture to generate a second amount of heat and a second amount of combustion products.
  • a multiple barrel forced-air heater comprising providing a multiple barrel forced-air heater, providing a fuel to the heater, producing a first air flow with the first device for producing a first air flow; using the first Venturi to mix some of the fuel with the first air flow to produce a first fuel-air mixture, combusting the first fuel-air mixture at the first combustion site to generate a first amount of heat, producing a second air flow with the second device for producing a second air flow; using the second Venturi to mix some of the fuel with the second air flow to produce a second fuel-air mixture; and combusting the second fuel-air mixture at the first combustion site to generate a second amount of heat.
  • a multiple barrel forced-air heater may comprise a base, a first heater jacket, and a second heater jacket.
  • the base may comprise a fuel tank adapted to accept a fuel.
  • the first heater jacket may comprise a first device for producing a first air flow, a first Venturi adapted to mix some of the fuel with the first air flow to form a first fuel-air mixture, and a first combustion site adapted to combust the first fuel-air mixture to generate a first amount of heat and a first amount of combustion products.
  • the second heater jacket may comprise a second device for producing a first air flow, a second Venturi adapted to mix some of the fuel with the second air flow to form a second fuel-air mixture, and a second combustion site adapted to combust the second fuel-air mixture to generate a second amount of heat and a second amount of combustion products.
  • a multiple barrel forced-air heater comprising a base, a rest engaged to the base, a first heater jacket engaged to the rest, and a second heater jacket engaged to the rest, a control component, a frame element, and a wheel.
  • the base may comprise a fuel tank adapted to accept a fuel, the fuel may comprise kerosene, oil, white gas, gasoline, alcohol, a hydrocarbon, or a mixture thereof.
  • the first heater jacket may comprise a first combustion chamber lining, a first fan or blower for producing a first air flow, a first Venturi adapted to mix some of the fuel with the first air flow to form a first fuel-air mixture, and a first combustion site adapted to combust the first fuel-air mixture to generate a first amount of heat and a first amount of combustion products.
  • the second heater jacket may comprise a second combustion chamber lining, a second fan or blower for producing a first air flow, a second Venturi adapted to mix some of the fuel with the second air flow to form a second fuel-air mixture, and a second combustion site adapted to combust the second fuel-air mixture to generate a second amount of heat and a second amount of combustion products.
  • the sum of the first amount of heat and the second amount of heat may be greater than 250,000 BTU.
  • FIG. 1 shows a front perspective view of one embodiment of a multiple barrel heater
  • FIG. 2 shows a front view of the heater illustrated in FIG. 1 ;
  • FIG. 3 shows a rear perspective view of the heater illustrated in FIG. 1 ;
  • FIG. 4 shows a rear perspective view of the heater illustrated in FIG. 1 ;
  • FIG. 5 shows a rear view of the heater illustrated in FIG. 1 ;
  • FIG. 6 shows a side view of the left side of the heater illustrated in FIG. 1 ;
  • FIG. 7 shows a side view of the right side of the heater illustrated in FIG. 1 ;
  • FIG. 8 a top view of the heater illustrated in FIG. 1 ;
  • FIG. 9 shows a bottom view of the heater illustrated in FIG. 1 .
  • a forced-air heater 10 may comprise, a base 30 , and heater jackets 12 .
  • the base 30 may comprise structural elements adapted to hold components of the force-air heater 10 in position and orientation with respect to one another, protect the forced-air heater 10 or to aid in movement of the forced-air heater 10 .
  • the base 30 may comprise metal, plastic, or combinations thereof.
  • a base 30 may comprise a wheel 24 operationally engaged with the base 30 to permit the force-air heater 10 to be moved by rolling it on said wheel 24 , a rest 26 configured to facilitate engagement of the heater jackets 12 with the base 30 , a frame element 28 , a frame element 29 , a frame element 34 , or combinations thereof.
  • the base 30 may comprise a fuel tank 30 a .
  • a fuel tank 30 a may be engaged to the base 30 .
  • the base 30 may define a fuel tank 30 a.
  • a base 30 may comprise a frame element 28 .
  • a frame element 28 may be adapted to function as a handle, a support, or a protective structure.
  • a frame element 28 may be adapted to push or pull or otherwise exert a load on the forced-air heater 10 to move it into a desired position or to lift the heater.
  • frame element 28 may be adapted to permit a user to raise one end of the heater forced-air heater 10 and move the heater 10 to a desired position.
  • frame element 28 may be attached to a rear portion of base 30 and may extend upward therefrom.
  • a base 30 may comprise a frame element 29 .
  • a frame element 29 may be adapted to function as a handle, a support, or a protective structure.
  • a frame element 29 may be adapted to push or pull or otherwise exert a load on the forced-air heater 10 to move it into a desired position or to lift the heater.
  • frame element 29 may be adapted to permit a user to raise one end of the heater forced-air heater 10 and move the heater 10 to a desired position.
  • frame element 29 may be attached to a front portion of base 30 and may extend upward therefrom.
  • a base 30 may comprise a frame element 34 .
  • a frame element 34 may be adapted to function as a handle, a support, or a protective structure.
  • a frame element 34 may be adapted to push or pull or otherwise exert a load on the forced-air heater 10 to move it into a desired position or to lift the heater.
  • frame element 34 may be secured to the lower portion of base 30 to provide support and to aid in leveling or stabilizing the entire heater 10 .
  • frame element 34 may be attached to a rear portion of base 30 and may extend downward therefrom.
  • Fuel may be loaded into base 30 via a fueling port 32 .
  • a fueling port 32 is an aperture in the housing of the fuel tank providing fluid communication between the environment and the fuel tank interior (not shown).
  • a fueling port 32 may be selectively closeable by a cap 34 .
  • a cap 34 may be threadedly engageable with the fueling port 32 .
  • Fuel (not shown) may comprise, without limitation, kerosene, number two heating oil, other oils, white gas, gasoline, ethanol, other alcohols, various hydrocarbons, or mixtures thereof.
  • a wheel 24 may be rotatably engaged with the forced-air heater 10 .
  • Rotatable engagement of a wheel 24 to the forced air heater 10 may be, without limitation, by rotatably mounting a wheel 24 to an axle 24 b .
  • a wheel 24 may be rotatably engaged to an axle 24 b by a bearing (not shown), a bushing (not shown), a nut (not shown), a bolt (not shown), a clip (not shown), or other mechanical fastener (not shown).
  • Rotatable engagement of a wheel 24 to the forced air heater 10 may be, without limitation, by engagement with an axle 24 b rotatably engaged with the forced air heater.
  • An axle 24 b may be rotatably engaged to the forced air heater 10 by a bearing (not shown), a bushing (not shown), a nut (not shown), a bolt (not shown), a clip (not shown), or other mechanical fastener (not shown).
  • Wheels 24 may comprise steel, plastic, rubber, or some combination thereof. Wheels 24 may comprise a hard rubber adapted to resist deterioration caused by exposure to the weather or accidental contact with chemicals that may be found at construction sites. Wheels 24 may comprise tires 24 a.
  • a forced-air heater 10 may comprise a set of wheels 24 on either side of a sagittal plane of the forced-air heater 10 .
  • a forced-air heater 10 may comprise a set of two wheels 24 on either side of the sagittal plane of the force-air heater 10 and biased toward the front of the forced-air heater 10 .
  • the heater 10 can be conveniently moved by lifting handle 28 and rolling the entire heater 10 on wheels 24 .
  • wheels 24 , frame element 28 , and frame element 34 are dimensioned and positioned to assist in moving or wheeling the heater 10 from one place to another.
  • the wheels 24 , frame element 28 , and frame element 34 are designed so that the forced-air heater 10 may be pulled or pushed around by lifting the inlet end 16 to disengage frame element 34 from the ground and rolling forced-air heater 10 , like a cart.
  • a forced-air heater 10 may comprise a rest 26 .
  • a rest 26 is an element adapted to mechanically engage the heater jacket 12 with the base 30 .
  • a rest may comprise a first surface adapted to conform, at least partially, to the heater jacket 12 and a second surface adapted to conform, at least partially, to the base 30 .
  • the rest 26 may be engaged to heater jacket 12 by welds (not shown), screws (not shown), bolts (not shown), clips (not shown), clamps (not shown), or other mechanical fasteners (not shown).
  • a rest 26 may define a control housing (not shown) adapted to house a control components 26 a , which may comprise a control switch, control dial, or other components adapted for user-selectable control input to the forced-air heater 10 .
  • the heater jackets 12 each comprise an inlet 16 , an outlet 18 , a top 20 and a bottom 22 .
  • the forced-air heater 10 comprises multiple elongated, substantially cylindrical (shown octagonal, which are substantially cylindrical) heater jackets 12 , which may differ from other heater jackets 12 in size, orientation, material, and functionality or may be substantially identical.
  • Heater jackets 12 may comprise metal, metal alloy, certain ceramics, or a combination thereof.
  • the heater jackets 12 may comprise one or more pieces of sheet metal.
  • the heater jackets 12 may each be formed from a single piece of steel sheet metal.
  • each heater jacket 12 may be a combustion chamber lining, which includes an opening to permit access of the ignitor to the interior of the region surrounded by heater jacket 12 .
  • a lining may be affixed to the jacket by means known in the art.
  • a motor may be located within the lining. The motor may be operably engaged with a suitable source of motor power. The source of motor power may be operably engaged with and controlled by control components 26 a .
  • the motor may be rigidly affixed directly or indirectly to the heater jacket 12 .
  • the motor may drive a fan, blower, or other device for producing air flow. In operation the device for producing air flow may create an air stream within the forced-air heater 10 .
  • the air stream may induct fuel into the forced-air heater 10 by flowing over an Venturi.
  • at least some of the air in the air stream may mix with fuel to form a fuel-air mixture.
  • the fuel air-mixture may be combusted at a combustion site to generate heat and combustion products.
  • heat and combustion products and excess air from the air stream flow out of an outlet 18 .
  • two or more barrels each comprise a Venturi adapted to introduce fuel into the barrel for combustion therein.
  • two or more barrels each comprise a device for producing air flow adapted to induct fuel into the forced-air heater 10 by flowing over an Venturi.
  • the two or more barrels may collectively produce a heat output greater than that possible by conventional heaters using a Venturi system to provide fuel input requirements.
  • the two or more barrels may collectively produce a heat output greater than 250,000 BTU.
  • the forced-air heater 10 may comprise a liner (not shown), inside the heater jacket 12 .
  • a liner may be immediately inside the heater jacket 12 .
  • a liner may be substantially cylindrical in shape.
  • a liner may be an insulator.
  • the forced-air heater 10 may comprise an insulative liner, insulative material, air gap, or other thermal insulation. In certain embodiments the kind or amount of thermal insulation may vary with position around a barrel of a forced-air heater 10 . In certain embodiments, the forced-air heater 10 may comprise a kind or amount of thermal insulation which provides greater or lesser thermal insulation on the side of a barrel proximate to another barrel.
  • the heater jackets 12 and the liner 14 there is a spaced-apart relationship between the heater jackets 12 and the liner 14 that forms an air gap between the heater jackets 12 and the liner 14 which insulates the housing from the heat-generating and heat-conducting parts of the heater 10 .
  • the air gap or other insulation may keep the heater jacket 12 cooler than it would be otherwise.
  • the spaced-apart relation may be achieved by bolting the liner 14 to the inside of the heater jackets 12 and using a plurality of spacers (not shown) at specific points to maintain the spaced-apart relationship.
  • the heater jackets 12 and the liner 14 are substantially concentrically located along a mutual longitudinal axis.
  • part of the air stream may be directed to flow along desired pathways within the forced-air heater 10 .
  • control vane or other air flow modifying components may be placed within the forced-air heater to produce a desired amount or air or speed of air flow at particular points within the forced-air heater 10 .
  • forced-air heater 10 may have air flow modifying components that produce an air flow that provides more air or faster air flow in locations proximate to another heater barrel.
  • forced-air heater 10 may comprise a grill 105 fastened to the inlet 16 of the forced-air heater 10 . A grill 105 may prevents large articles from entering and damaging the interior of the forced-air heater 10 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Combustion Of Fluid Fuel (AREA)
US13/240,352 2010-09-23 2011-09-22 Multiple Barrel Forced Air Heater Abandoned US20120240916A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/240,352 US20120240916A1 (en) 2010-09-23 2011-09-22 Multiple Barrel Forced Air Heater
PCT/US2011/053008 WO2012040590A2 (fr) 2010-09-23 2011-09-23 Élément chauffant à air forcé à plusieurs cylindres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US38574010P 2010-09-23 2010-09-23
US13/240,352 US20120240916A1 (en) 2010-09-23 2011-09-22 Multiple Barrel Forced Air Heater

Publications (1)

Publication Number Publication Date
US20120240916A1 true US20120240916A1 (en) 2012-09-27

Family

ID=45874408

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/240,352 Abandoned US20120240916A1 (en) 2010-09-23 2011-09-22 Multiple Barrel Forced Air Heater

Country Status (2)

Country Link
US (1) US20120240916A1 (fr)
WO (1) WO2012040590A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3099812A1 (fr) 2019-08-08 2021-02-12 Eco-Tech Ceram Ensemble de génération de chaleur et procédé de pilotage dudit ensemble
US20220136704A1 (en) * 2020-11-04 2022-05-05 Milwaukee Electric Tool Corporation User interface for heater
USD963817S1 (en) 2020-12-14 2022-09-13 Milwaukee Electric Tool Corporation Portable heater

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1872795A (en) * 1928-08-03 1932-08-23 Creamery Package Mfg Co Process of heating milk
US3556065A (en) * 1969-01-15 1971-01-19 Wilmer C Jordan Devices and methods for forming air-fuel mixtures
US5540213A (en) * 1994-04-15 1996-07-30 Desa International Portable kerosene heater
US5865618A (en) * 1997-12-10 1999-02-02 Hiebert; Jacob F. Self-regulating forced air heater
US7823579B2 (en) * 2006-10-04 2010-11-02 Enerco Group, Inc Vertically-storable combustion heater
US8068724B2 (en) * 2006-12-12 2011-11-29 Enerco Group, Inc. Forced air heater including on-board source of electric energy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3099812A1 (fr) 2019-08-08 2021-02-12 Eco-Tech Ceram Ensemble de génération de chaleur et procédé de pilotage dudit ensemble
US20220136704A1 (en) * 2020-11-04 2022-05-05 Milwaukee Electric Tool Corporation User interface for heater
US12169071B2 (en) * 2020-11-04 2024-12-17 Milwaukee Electric Tool Corporation User interface for heater
USD963817S1 (en) 2020-12-14 2022-09-13 Milwaukee Electric Tool Corporation Portable heater

Also Published As

Publication number Publication date
WO2012040590A3 (fr) 2012-06-14
WO2012040590A2 (fr) 2012-03-29

Similar Documents

Publication Publication Date Title
JP4563374B2 (ja) 触媒又は高温酸化体なしにフレームレス燃焼を促進する方法及び装置
US9052121B2 (en) Mobile water heating apparatus
US9134033B2 (en) Open loop gas burner
US20140020669A1 (en) HVAC Furnace
US20210071909A1 (en) Portable Heater
US20120240916A1 (en) Multiple Barrel Forced Air Heater
US20040185405A1 (en) Fuel density reduction method and device to improve the ratio of oxygen mass versus fuel mass during ignition in combustion mechanisms operating with fluid hydrocarbon fuels
CN104924873A (zh) 车辆加热器
US20130160756A1 (en) Two-piece warming oven
US9423150B2 (en) Steam cooker
US20230067959A1 (en) Hot water pressure washer
US8485175B1 (en) Heater with catalyst and combustion zone
US3388697A (en) Indirect air heater
EP3014193B1 (fr) Réchauffeur d'air
KR102190853B1 (ko) 가스 온풍기
DK2981990T3 (en) PORTABLE AIR HEATING SYSTEM
US2579158A (en) Heating system
US9915042B2 (en) Multiple burner zone controlled asphalt heating hood
US11041277B2 (en) Apparatus and method for infrared heating of asphalt
CA2738721C (fr) Conduit d'air chaud auxiliaire pour un generateur d'air chaud a combustion indirecte
US20240219069A1 (en) Gas heater
KR101623913B1 (ko) 휴대용 온풍 히터
CN218626824U (zh) 一种便携式燃烧机
WO2010058180A2 (fr) Ensemble brûleur radiant à gaz
KR102399003B1 (ko) 휴대용 보일러

Legal Events

Date Code Title Description
AS Assignment

Owner name: ENERCO GROUP, INC., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JEDRZEJEK, TIMOTHY, MR.;REEL/FRAME:027176/0840

Effective date: 20111011

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION