EP3287711A1 - Chauffage à air chaud - Google Patents

Chauffage à air chaud Download PDF

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Publication number
EP3287711A1
EP3287711A1 EP17187951.3A EP17187951A EP3287711A1 EP 3287711 A1 EP3287711 A1 EP 3287711A1 EP 17187951 A EP17187951 A EP 17187951A EP 3287711 A1 EP3287711 A1 EP 3287711A1
Authority
EP
European Patent Office
Prior art keywords
air
combustion chamber
exhaust
arrow
hot air
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.)
Withdrawn
Application number
EP17187951.3A
Other languages
German (de)
English (en)
Inventor
Ludwig Gürtner
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.)
G & S GmbH
Original Assignee
G & S GmbH
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 G & S GmbH filed Critical G & S GmbH
Publication of EP3287711A1 publication Critical patent/EP3287711A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/067—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators using solid 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
    • F24H9/0052—Details for air heaters
    • F24H9/0057—Guiding means
    • 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
    • F24H9/0052—Details for air heaters
    • F24H9/0073—Arrangement or mounting of means for forcing the circulation of air

Definitions

  • the invention relates to a hot air heating for the production of hot air with solid or liquid fuels, in particular for combustion with pellets, and with oil or gas.
  • Warm air heaters are known in the form of so-called Bautropic- or tent heaters, which are equipped with a mobile housing, which is associated with a heat generator and where an outside of the housing arranged electrically operated fan is present, which sucks in the outside air and introduces into the housing. In the housing one or more flues are present, which are flowed through by the injected fresh air for the purpose of heat absorption.
  • the hot air heating is operated with a burner which gasifies pellets, although the invention is not limited thereto.
  • a pellet burner other burners may be used, such as oil or gas burners.
  • German utility model DE 20 2014 009 049 is such a hot air heater has become known, however, is designed as a mobile hot air device in which the upper heating coil for guiding the flue gases from rectangular profiled sheet metal channels, which are connected to each other in an airtight manner via subsequent collector.
  • the cited document also discloses in the rear region of the combustion chamber, a rear, standing flat register, which is flowed through on the inside by the exhaust gases.
  • a rear, standing flat register which is flowed through on the inside by the exhaust gases.
  • the combustion chamber is disadvantageously formed in its axial length so that the rear combustion chamber bottom abuts directly on the rear, standing flat register, whereby an optimal air flow of the exhaust gases is hindered by the two flat registers.
  • Another disadvantage of the document is that a so-called three-chamber train is disclosed, which has a poor heat transfer efficiency.
  • the invention is therefore based on the above DE 20 2014 009 049 U1 the object of developing such a mobile hot air device so that it has a much better efficiency lower energy consumption with the same or improved air performance. In addition, the amount of accumulating fine dust is to be reduced.
  • the invention is characterized by the technical teaching of claim 1.
  • a feature of the invention is that now the hot air device according to the invention is not designed as a mobile device, but is anchored stationary on a floor, with a base plate is provided with which the device can be mounted directly on a footprint.
  • the advantage of stationary hot air heating is also that with stationary air heaters it is customary to arrange such heating modules in an enclosing space, and this enclosing space then offers the advantage that additional air preheating is provided for the fresh air to be aspirated.
  • the fresh air is therefore not extracted directly from the ambient air, but from the enclosing space in which the stationary hot air heating is arranged, which offers advantages in energy utilization.
  • such a hot air heater according to the invention can be installed in a container which is placed stationary, and the sucked fresh air is then removed from the container, which is preheated by the housing of the hot air heater.
  • the radiant heat of the hot air heating is used for air preheating the fresh air sucked.
  • Another feature of the invention is compared to the DE 20 2014 009 049 U1 in that instead of a three-train combustion chamber, a four-stroke combustion chamber is now provided.
  • four-stroke combustion chamber is understood to mean that the exhaust gas stream of the burner flame produced escapes through four different, spatially separated exhaust gas trains in the direction of the exhaust pipe and is guided in such a way that the fresh air drawn in is led over a total of four different exhaust gas trains.
  • the use of a four-pass combustion chamber has the advantage of better energy utilization, a smaller amount of particulate matter and better cleaning options.
  • the four-pass combustion chamber consists of a first lower horizontal exhaust draft, the via the rear standing flat register merges into a vertical lower flue, which opens into a rear header, and further that the third train consists of a combustion chamber near collector, which receives the fuel gases in the vertical direction and passes through the upper flat plate, which also connected to the rear collecting chamber.
  • two mutually spaced and mutually parallel vertical exhaust trains are provided which are each connected in an air-tight manner with two mutually parallel and horizontal exhaust trains, resulting in a total of a four-train exhaust gas combustion chamber.
  • the energy consumption is lowered because of the improved heat transfer rate, whereby tests have shown that in comparison with a three-pass combustion chamber, the energy consumption could be reduced again by 20%.
  • the invention provides the advantage that only 13 kg per hour are consumed, which corresponds to a fuel oil consumption of 6.5 liters per hour.
  • Another advantage of the invention is that the outer shell of the combustion chamber can be cooled to a temperature of 55 ° C, that is, the combustion chamber has no undesirably high temperature, which must be dissipated, because the energy dissipation from the combustion chamber through the crunes trigger system and is achieved by the optimal deflection of the fresh air to the exhaust trains described.
  • Another advantage is that due to the low surface temperatures of the combustion chamber and the surrounding other air-conducting components to relatively thick sheet thicknesses of, for example, 4 or 5 mm can be dispensed with, and thin sheet thicknesses for the flat register of, for example, 1 mm can be used, without resulting in deformation of the flat register. Thus, the total weight and the manufacturing cost of such a hot air generator are lowered significantly.
  • the cross section of the flat register is not rectangular, then rectangular flow cross sections are formed, but the flat register plates are approximately trapezoidal in cross-section, which means that they have a much better resistance to bending and deformation and yet develop a large heat transfer area. They can therefore be made from a thinner sheet metal.
  • Another advantage of the hot air heating according to the invention is because of the use of relatively small sheet thicknesses in that a relatively rapid warming of the fresh air sucked in and therefore when switching off the system and a rapid cooling of the system is guaranteed.
  • the axial fan according to the invention is arranged at the top of the heater housing and the sucked fresh air is directed from top to bottom blown into the heater housing. This results in a optimal temperature increase of the other, arranged in the heater housing sheet materials.
  • An advantage of this measure is that the blown in the upper part of the heater housing fresh air is already preheated to the exhaust trains according to the invention, before it sweeps over the burner housing and is further heated there.
  • the hot air generating system comprises a heater housing 1, and with the progression of the figure numbers each parts of the heater housing have been omitted for clarity, to provide a better insight into the inner parts of the heater housing 1.
  • the heater housing 1 is after FIG. 1 from an upper sheet 2, which is designed as a heat shield. It is therefore double-walled.
  • the upper, horizontal plate 2 merges into a vertical, front plate 3, which is likewise designed as a heat protection plate, wherein in the front plate 3 a show tube 4 is provided for the insight into the combustion chamber 16.
  • a flange pipe 49 is arranged for the attachment of a burner 5, which is associated with a flange 48 (see FIG. 3 ).
  • an ash collector 6 is arranged, which is closed by a lid.
  • the garble combustion chamber 16 is arranged, which will be described later in more detail.
  • the bottom of the heater housing 1 is formed by a base plate 17, are provided in the lateral receiving openings 20 for retracting the tines of a stacker.
  • the heater housing 1 can be stationarily placed on a site.
  • an exhaust pipe 7 is arranged, through which the exhaust gases flow in the direction of arrow 22 upwards.
  • an axial fan 8 is arranged in the upper region, which has two mutually opposite, mutually aligned suction openings 24, so that the fresh air is sucked in the opposite arrow directions 23 via both suction ports 24 and the both sides sucked air flow centrally into the heater housing 1 is blown.
  • the air outlet of the hot air produced is also carried out in the rear area, in the region of the rear plate 9, where the air outlet 11 is present, on which a non-illustrated flexible hose for discharging the hot air generated can be arranged.
  • the rear sheet 9 is covered by a rear heat shield 10 inside.
  • the separation of the fresh air channel in the vertical direction in the interior of the heater housing is effected by a horizontally located locking plate 26, which ensures that the injected fresh air from the fan 8 is inserted horizontally in the upper region of the heater housing 1 and does not fall directly downwards in the direction of the combustion chamber ,
  • a Vier satisfiede combustion chamber 16 which is formed by a rear, lower collector 13, which is arranged horizontally, and in which the fuel gases flow from the combustion chamber 16 in the horizontal direction.
  • This collector 13 is the lower (first) flue 42, which is flowed around by the fresh air.
  • the fresh air introduction takes place in the heater housing 1 via an injection opening 25, so that it is ensured that the injected fresh air flows only in the horizontal direction, namely in the direction of arrow 27, in the upper part of the heater housing 1 and does not immediately fall down.
  • This purpose is also served by a front guide plate 28 which is arranged in the interior of the heater housing 1 in the region of the front plate 3.
  • the combustion chamber 16 is supported with a total of four feet 14 on the base plate 17, and above the base plate 17, a lower plate 15 is arranged, which extends over the entire base surface of the heater housing 1 and part of the base plate 17.
  • a heat shield 18 is arranged on the bottom side, which is interspersed by the feet 14 so that the heat shield 18 avoids that inadmissible heat against the base plate 17 and the lower plate 15 is discharged.
  • FIG. 2 For more details, refer to important parts FIG. 1 in FIG. 2 were removed.
  • FIG. 2 The basic features of the four-way exhaust draft system are out FIG. 2 already to be seen, although in conjunction with FIG. 4 to be described in more detail.
  • the combustion chamber 16 generates a flame in the direction of flame 38 and in conjunction with FIG. 6 the rear end of the combustion chamber 16 is formed by the fact that extends approximately over the horizontal width of the combustion chamber 16, an angle plate 54, which consists of an upper horizontal leg 54a and a vertical leg 54b.
  • the vertical leg 54 b of the angle plate 54 is formed shorter in width, so that laterally lower acute-angled Einströmötechnisch 85 for the inflow of fuel gases to the rear, in the first flue 42 result.
  • the inlet openings are closed at the top by cover plates 84, so that the fuel gases can flow out only in the indicated arrow directions 86 through the inlet openings 85 to the rear.
  • the heating gases flow in the direction of arrow 86 as part streams and are directed in the direction of arrow 37 vertically upwards, deflected into the rear (second) flue 39.
  • the rear (second) flue 39 is formed by the clear cross sections of the rear flat register 12, so that all in the horizontally located (first) flue 42 flowing fuel gases flow through the interior of the heat exchanger plates 29 arranged there. This is in dashed arrows in FIG. 2 indicated where indicated by the direction of the arrow 37, that the fuel gases from the lower flue 42, that is the horizontal collector 13) are deflected in the direction of arrow 37 and respectively through the inner cross sections of the heat exchanger plates 29 of the second, vertically standing flue 39 to flow therethrough.
  • the rear flat register 12 with its standing heat exchanger plates 29 is connected as a second flue 39 air-tight with the lower, horizontal collector 13 as the first flue 42.
  • part of the combustion gases is branched off from this exhaust gas flow and passed through the third and fourth exhaust gas trains 40, 41.
  • Characteristic of the upper, lying flat register is that there vertically upright, a mutual distance to each other engaging heat exchanger plates 34 are present, the space is flowed through by the fresh air to be heated.
  • the upper flat register 33 thus forms the fourth exhaust gas train 41.
  • the exhaust gases flowing through the individual heat exchanger plates are thus guided in the direction of arrow 62 through the interior of the heat exchanger plates 34 and also open into the rear header 35, where they unite with the exhaust gas flow from the rear exhaust 39 and flow out of the exhaust pipe 7 in the direction of arrow 59.
  • the fresh air 64 sucked in by the axial fan 8 flows into a rear injection chamber 65, which is sealed in an air-tight manner on the bottom side by the blocking plate 26 with respect to the interior of the heating housing 1.
  • the fresh air 64 flows around a part of the rear flue 39 and the rear header 35.
  • the injection chamber 67 is delimited toward the front sheet 3 by an arcuate air guide plate 32 so that the fresh air already partially heated in the directions of the arrows 68 and 70 is deflected on this air guide plate 32 in the direction of arrow 72 into the deflection chamber 71 arranged there and flows in the direction of the arrow down into a circulating air space 51 formed at the front.
  • the fresh air 64 which is increasingly heated there, is discharged downwards in the vertical circulation air space 51 arranged at the front and is redirected in the direction of the arrow 73 on the bottom side and flows along the bottom 87 of the combustion chamber 16.
  • the fresh air 64 to be heated also flows in the direction of the arrow 66 through the passage tubes 31 passing through the front collector 46 in a horizontal direction forwards into the circulating air space 51 arranged at the front.
  • passage tubes 31 Due to the arrangement of the spaced apart and horizontally located passage tubes 31, which are thermally conductively connected to the surfaces of the front header 46, there is an optimal heat transfer to the horizontal in the direction of arrow 66, these passage tubes 31 by flowing hot air flow.
  • the circulating air space 51 is closed on the bottom side with an air guide plate 30 which deflects the air flow in the indicated arrow direction 73 and leads to the bottom 87 of the combustion chamber 16 along the outside.
  • the air flow thus flows in the horizontal direction of arrow 74 at the bottom 87 of the combustion chamber 16 and enters the indicated arrow direction in the circulating air chamber 19, which surrounds the entire combustion chamber 16, so that the thus heated fresh air from arrow 74 continues to flow in the direction of arrow 75, the circulating air 19th flows through and is deflected in the rear area in the direction of arrow 77.
  • the lower flue 42 is closed at the rear end by a closing flap 58 which is open and can be done on the revision work.
  • FIG. 5 shows that in the rear header 35, a lid 80 is arranged for a cleaning opening.
  • the FIG. 5 also shows that the respective profile of the heat exchanger plates 29 of the upper flat register 33 and the stationary rear flat register 12 is formed approximately trapezoidal, and thus form trapezoidal outflow or flow openings 79.
  • the heat exchanger plates have a trapezoidal flow profile.
  • FIG. 5 also shows that the combustion chamber 16 is closed at the rear end by a barrel-shaped combustion chamber bottom 81, and in FIG. 5 is also a part plate indicated, which was previously designated by the reference numeral 56 as a reversing plate.
  • the barrel-shaped combustion chamber floor 81 has good reflection properties for the burner flame 53 reflected on the inside and forms a large heat transfer surface on the outside.
  • the angle plate 54 consists of a horizontal leg 54a and a vertical leg 54b.
  • FIG. 6 hits the burner flame 53 with the accompanying fuel gases in the direction of arrow 55 at right angles to the vertical leg 54b of the angle plate 54.
  • the fuel gases are thereby deflected laterally in the direction of arrow 86 and flow through small-sized, lateral inlet openings 85 in the direction of arrow 55 from.
  • the openings are covered above the horizontal leg 54a by cover plates 84, so that only relatively small dimensioned lower inlet openings 85 are provided laterally on the vertical leg 54b of the angle plate 54.
  • the vertical leg 54b of the angle plate 54 is thereby bounded by the side edges 88.
  • the vertical leg 54b of the angle plate 54 has in the direction of the bottom 87 of the combustion chamber 16 an exemption 83, through which the Exhaust gas flows in the direction of the arrow in the lower flue 42.
  • the vertical leg 54b of the angle plate 54 forms a Switzerlandumlidung for the exhaust gas flow, and thus a better heat transfer surface.
  • the hot air generating system is theponderede flue 39, 40, 41, 42, which leads to an optimal heating of the sucked fresh air flow.
  • the fresh air flow is heated at a plurality of heated surfaces of the four-way exhaust flue 39-42, whereby it comes to a favorable heat transfer with high efficiency.
  • the arrangement of a stationary, rear flat register 12 has the advantage that accumulating fine dust is accumulated in the lower, lying flue 42 and can be removed via the end flap 58.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP17187951.3A 2016-08-25 2017-08-25 Chauffage à air chaud Withdrawn EP3287711A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016010167.9A DE102016010167A1 (de) 2016-08-25 2016-08-25 Warmluftheizung

Publications (1)

Publication Number Publication Date
EP3287711A1 true EP3287711A1 (fr) 2018-02-28

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ID=59745207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17187951.3A Withdrawn EP3287711A1 (fr) 2016-08-25 2017-08-25 Chauffage à air chaud

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EP (1) EP3287711A1 (fr)
DE (1) DE102016010167A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109579307A (zh) * 2018-09-26 2019-04-05 中山市恒乐电器有限公司 一种带有排气组件的燃气热水器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245586A (en) * 1940-02-09 1941-06-17 Gustave R Holmann Hot air heating furnace
US2512384A (en) * 1945-09-04 1950-06-20 Dravo Corp Direct-fired hot-air heating apparatus
US20120090590A1 (en) * 2010-10-15 2012-04-19 Carrier Corporation Inducer fan assembly for a gas furnace system
US20140174424A1 (en) * 2012-12-24 2014-06-26 Gd Midea Heating & Ventilating Equipment Co., Ltd. Heat exchanger and gas-fired furnace comprising the same
DE202014009049U1 (de) 2014-11-15 2016-02-16 Mobil In Time Ag Mobile Warmlufterzeugungsanlage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245586A (en) * 1940-02-09 1941-06-17 Gustave R Holmann Hot air heating furnace
US2512384A (en) * 1945-09-04 1950-06-20 Dravo Corp Direct-fired hot-air heating apparatus
US20120090590A1 (en) * 2010-10-15 2012-04-19 Carrier Corporation Inducer fan assembly for a gas furnace system
US20140174424A1 (en) * 2012-12-24 2014-06-26 Gd Midea Heating & Ventilating Equipment Co., Ltd. Heat exchanger and gas-fired furnace comprising the same
DE202014009049U1 (de) 2014-11-15 2016-02-16 Mobil In Time Ag Mobile Warmlufterzeugungsanlage

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DE102016010167A1 (de) 2018-03-01

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