WO2013046174A1 - Dispositif de chauffage - Google Patents

Dispositif de chauffage Download PDF

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Publication number
WO2013046174A1
WO2013046174A1 PCT/IB2012/055202 IB2012055202W WO2013046174A1 WO 2013046174 A1 WO2013046174 A1 WO 2013046174A1 IB 2012055202 W IB2012055202 W IB 2012055202W WO 2013046174 A1 WO2013046174 A1 WO 2013046174A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
conversion device
flame
conversion
heat generator
Prior art date
Application number
PCT/IB2012/055202
Other languages
English (en)
Inventor
Roberto Gaddi
Giuseppe Luciano TOSETTI
Francisco Gomez Paz
Matteo Paolo Giuseppe CODECASA
Original Assignee
Italkero S.R.L.
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 Italkero S.R.L. filed Critical Italkero S.R.L.
Publication of WO2013046174A1 publication Critical patent/WO2013046174A1/fr

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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
    • F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
    • F24H3/087—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C1/00—Stoves or ranges in which the fuel or energy supply is not restricted to solid fuel or to a type covered by a single one of the following groups F24C3/00 - F24C9/00; Stoves or ranges in which the type of fuel or energy supply is not specified
    • F24C1/08—Stoves or ranges in which the fuel or energy supply is not restricted to solid fuel or to a type covered by a single one of the following groups F24C3/00 - F24C9/00; Stoves or ranges in which the type of fuel or energy supply is not specified solely adapted for radiation heating
    • F24C1/10—Stoves or ranges in which the fuel or energy supply is not restricted to solid fuel or to a type covered by a single one of the following groups F24C3/00 - F24C9/00; Stoves or ranges in which the type of fuel or energy supply is not specified solely adapted for radiation heating with reflectors
    • 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
    • F24H3/025—Air heaters with forced circulation 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
    • F24H2240/00—Fluid heaters having electrical generators

Definitions

  • the invention relates to a heating apparatus, able to emit a thermal power capable of heating an environment in which the apparatus is installed.
  • the apparatus according to the invention can be used for heating external environments, in particular environments arranged outside commercial buildings such as restaurants, bars, shops and the like, but also private or public gardens and terraces.
  • the apparatus according to the invention can be used for heating internal environments, for example domestic environments or offices.
  • Heating apparatuses are known, intended to be used mainly for heating external environments, comprising a base from which a glass tube projects upwards. Inside the glass tube, there is a flame, generated by a gas burner. The gas burner is fed with gas contained inside a cylinder, housed in a base of the heating apparatus. The flame arranged inside a glass tube enables the effective heating of the zones surrounding the apparatus and, at the same time, is particularly pleasant from an aesthetic point of view.
  • the lighting system comprising a plurality of lights positioned so as to illuminate the base, which has a lateral wall made of translucent material.
  • the lighting system comprising a plurality of lights positioned so as to illuminate the base, which has a lateral wall made of translucent material.
  • the effect of the illuminated base is added to pleasant impression produced by the flame contained in the glass tube.
  • a heating apparatus is obtained which is also able to effectively illuminate the zone where it is placed .
  • providing a lighting system for lighting the base causes a series of considerable difficulties.
  • the lighting system needs to be connected to electricity, which can be complicated in the event of heating apparatuses intended to be positioned outside buildings.
  • US 2007/0221200 discloses a device for generating heat, suitable for being positioned along a vertical tube of a wood- or pellet-burning stove to recover a part of the heat contained in the fumes that pass through the vertical tube.
  • the device comprises an external wall and an internal wall between which an air channel is defined.
  • a pair of inlets is provided, through which a flow of cold air conveyed by a fan can enter into the air channel. After being heated by the heat emitted by the tube of the stove, the air is reintroduced into the environment through a front outlet.
  • the device comprises a Seebeck effect thermoelectric generator, which exploits the temperature difference between the internal wall of the device and the air at ambient temperature which enters into the air channel.
  • the Seebeck effect thermoelectric generator powers the fan which conveys the cold air into the air channel.
  • a defect of the device discloses in US 2007/0221200 is that the electric power that can be produced by the Seebeck effect thermoelectric generator is very low. This is due to the fact that the temperature difference between the internal wall of the device, positioned in contact with the tube of the stove, and the air circulating in the air channel is not very high. Even if the tube of the stove can be heated by the fumes deriving from combustion, the above-mentioned difference does not exceed a few tens of degrees.
  • GB 2451521 discloses a portable heater that allows water to be heated, the portable heater being suitable for being used in external environments particularly by military troops.
  • the heater comprises a combustion chamber inside which a burner that burns diesel oil is arranged.
  • a Peltier-Seebeck thermoelectric generator extends vertically in a position adjacent to the combustion chamber.
  • the thermoelectric generator has a hot side facing the combustion chamber and a cold side facing the opposite part with respect to the combustion chamber inside an inlet chamber.
  • An air flow is conveyed into the inlet chamber by a fan powered by the thermoelectric generator. After licking the cold side of the thermoelectric generator, the air flow enters the combustion chamber where it provides the oxygen necessary for combustion.
  • the air flow conveyed by the fan powered by the thermoelectric generator therefore has the sole purpose of allowing combustion, but it does not serve to heat the air that increases temperature of the environment and therefore comfort for the user.
  • the fumes leaving the combustion chamber heat the water contained in a tank and are then taken into the atmosphere through a tube.
  • the portable heater disclosed in GB 2451521 allows a limited amount of water to be heated, but is not suitable for significantly heating an environment.
  • GB 2451521 does not teach how to use the Seebeck effect thermoelectric generator for purposes different from powering the fan.
  • US 6588419 discloses a gas fireplace appliance comprising a chamber in which a flame is generated owing to combustion of a gas.
  • the fireplace further comprises a heat exchanger for heating air coming from the environment in which the fire is installed and reintroducing heated air into the environment.
  • the heat exchanger can comprise an air inlet positioned in a front zone of the fireplace below the chamber, an air outlet positioned in the front zone of the fireplace above the chamber and a heat exchange path that connects the air inlet to the air outlet passing behind the chamber.
  • a fan operated by a motor is arranged along the heat exchange path near the air inlet to convey an air flow along the heat exchange path.
  • the fireplace further comprises a thermoelectric generator arranged along the heat exchange path, behind the chamber in which the flame is formed.
  • the thermoelectric generator is connected to the motor which operates the fan for powering that motor.
  • the thermoelectric generator comprises a hot side facing the chamber and a cold side facing the inside of the heat exchange path.
  • a defect of the fireplace disclosed in US 6588419 is that the temperature difference between the cold side and the hot side of the thermoelectric generator may not be sufficient to generate enough electric power to supply the motor which operates the fan. This can happen because, due to its position, it is not easy to effectively cool the cold side of the fan. On the other hand, the conformation of the fireplace does not make it possible to adopt alternative positions of the cold side of the thermoelectric generator.
  • WO 2006/103613 discloses a portable stove for cooking, supplied by a solid fuel.
  • the stove comprises a combustion chamber above which a pan can be positioned. Below the combustion chamber, there is a compartment, which houses a fan for sending air from the external environment towards the inside of the combustion chamber.
  • a thermoelectric generator can be positioned below the combustion chamber to provide electrical energy which powers the fan.
  • the electrical energy generated by the thermoelectric generator can also have the function of supplying accessory devices, for example, a white light emitting diode (LED) . This function is however completely secondary, since the main use of the electrical energy generated by the thermoelectric generator is to power the fan.
  • LED white light emitting diode
  • thermopile which uses the Seebeck effect, arranged inside a cavity of a black body or another source of heat, in which the hot junctions are inside the heat source, and the cold junctions are outside the heat source.
  • An object of the invention is to improve existing heating apparatuses, whether they are intended to heat external environments or environments located inside buildings .
  • Another object is to provide a heating apparatus that can be equipped with an electrical device without being permanently connected to electricity or without being permanently supplied by batteries.
  • Still another object is to provide a heating apparatus that, beyond heating an environment, can make other additional functionalities available that require an electric power supply.
  • Another object is to provide a heating apparatus that can produce a sufficient amount of heat sufficient to heat an environment, and in which the heat produced can be exploited in the most efficient way possible.
  • an apparatus comprising:
  • a heat generator capable of generating heat for heating an environment
  • tubular element made of a transparent material, the tubular element being positioned above the heat generator for containing a flame generated by the heat generator;
  • the apparatus Owing to the first aspect of the invention, it is possible to obtain an apparatus for effectively heating an environment, particularly an external environment, the apparatus having a pleasant aesthetic appearance, thanks in particular to the tubular element that makes it possible to see the flame from the outside.
  • the aesthetic appearance is further improved if the electrical energy generated by the conversion device is used to illuminate a part of the apparatus, for example the base.
  • the conversion device allows the apparatus to be electrically independent, which makes it possible to install the apparatus even in external environments that cannot be connected to electricity. It is also possible to avoid frequent battery replacement operations .
  • an apparatus comprising a heat generator capable of generating an amount of heat sufficient to heat an environment, characterized in that the apparatus further comprises a conversion device for converting a part of the heat generated by the heat generator into electrical energy .
  • the conversion device Owing to the conversion device, a certain amount of electrical energy can be made available by the apparatus according to the invention. This amount of electrical energy can be used to power a desired additional device positioned on board the apparatus, for example a lighting device, a battery charger, a USB port or a ventilator.
  • the additional device can be supplied electrically without connecting the apparatus to electricity, or without providing dedicated batteries on the apparatus, which would require periodic replacement operations.
  • the additional device may at the most need a buffer battery that the conversion device is however able to recharge.
  • the electrical energy needed to operate the desired additional device is obtained directly from the heat produced by the heat generator, without any additional operating costs.
  • the conversion device comprises a Seebeck effect conversion device or conversion module.
  • the Seebeck effect conversion device allows electrical energy to be obtained exploiting the temperature difference between a component heated by the heat generator and a further component cooled by the air that circulates in the environment.
  • the Seebeck effect conversion device can allow an electric power indicatively ranging from 5 W to 100 W to be produced.
  • the conversion device can comprise a heat dissipating element suitable for being cooled by the ambient air so as to take heat away from the conversion module.
  • the conversion device can also comprise a heat capturing element suitable for being heated by the heat generator, the conversion module being interposed between the heat capturing element and the heat dissipating element.
  • the conversion device comprises a plurality of conversion modules distributed around a flame produced by the heat generator.
  • the apparatus further comprises a lighting device supplied by the electrical energy produced by the conversion device.
  • the lighting device allows the environment in which the apparatus is installed to be illuminated and at the same time can be used to create plays of light which make the apparatus particularly appreciated from an aesthetic point of view.
  • the apparatus further comprises a ventilator arranged to convey air heated by the heat generator in a desired zone of said environment, the ventilator being powered by the electrical energy produced by the conversion device.
  • the apparatus can comprise a tubular element inside which a flame extends, the flame being generated by the heat generator.
  • the tubular element acts as a containment element inside which the flame can develop.
  • the tubular element is made of a transparent material, for example glass.
  • the flame remains visible in the environment heated by the apparatus, which is very pleasant for people near the apparatus .
  • the heat generator can be arranged at a lower end of the tubular element.
  • the ventilator can be arranged at an upper end of the tubular element, in order to convey the air heated by the flame downwards.
  • This arrangement of the ventilator allows the air heated by the flame, which would naturally tend to rise, to be brought back downwards, that is, towards the zone of the environment to be heated where people actually stay.
  • the apparatus comprises a ventilation device for conveying cold air along a path towards a heat dissipating element of the conversion device, the ventilation device being powered by the electrical energy produced by the conversion device.
  • the ventilation device allows the temperature of the heat dissipating element to be kept below a desired level, which allows the effectiveness of the conversion device to be increased.
  • the ventilation device is positioned upstream of the heat generator, so that the cold air conveyed by the ventilation device, after cooling the heat dissipating element, is heated when interacting with the heat generator and is then distributed into the surrounding environment.
  • a single ventilation device allows both the temperature of the heat dissipating element to be kept low and the air to be conveyed into the environment after it has been heated.
  • an inlet path is defined through which an air flow is sucked by the heat generator so that the air flow can act as a comburent, the heat dissipating element being positioned along said inlet path upstream of the heat generator.
  • the flow of sucked air is thus used both to provide the necessary amount of comburent for the heat generator and to cool down the heat dissipating element, in order to increase the yield of the conversion device. This allows the effectiveness of the apparatus to be increased, without however complicating its structure.
  • Figure 1 is a perspective view of an apparatus for heating an environment, particularly an external environment ;
  • Figure 2 is a diagram showing an electric circuit that operates according to the principle used in the apparatus in Figure 1;
  • Figure 3 is an enlarged and interrupted perspective view, of a central portion of the apparatus in Figure 1, sectioned along a vertical plane;
  • Figure 4 is an enlarged and partially exploded perspective view, showing a conversion device of the apparatus in Figure 1;
  • Figure 5 is a perspective and enlarged view showing a heat capturing element of the conversion device in Figure 4;
  • Figure 6 is a perspective and enlarged view showing a heat dissipating element of the conversion device in Figure 4;
  • Figure 7 is a schematic and interrupted section, showing a central portion of a heating apparatus according to an alternative embodiment
  • Figure 8 is a schematic lateral view of a heating apparatus according to an alternative embodiment, in which some external parts of the apparatus have been removed to highlight the internal components;
  • Figure 9 is a schematic and enlarged section, showing a heat exchanger of the apparatus in Figure 8;
  • Figure 10 is a view like the one in Figure 1, showing a heating apparatus according to a further alternative embodiment
  • Figure 11 is an enlarged and partially exploded perspective view, showing a conversion device of the apparatus in Figure 10;
  • Figure 12 is a schematic view taken from above, highlighting a central portion of a heating apparatus according to another alternative embodiment
  • Figure 13 is a schematic section, taken along the plane XIII-XIII of Figure 12.
  • Figure 1 shows an apparatus 1 for heating an environment.
  • the apparatus 1 is intended to be used mainly for external use, for example, for heating an environment located outside a commercial building, such as a restaurant, a bar, a shop or the like, or a garden or a terrace, either private or public.
  • the apparatus 1 comprises a heat generator so dimensioned as to generate an amount of heat sufficient to heat the environment in which the apparatus 1 is inserted.
  • the heat generator can have a power higher than 5 kW, in particular ranging from 8 to 12 kW.
  • the heat generator can be of the gas type.
  • the heat generator can comprise a gas burner 2, shown in Figure 3, suitable for being supplied with a gaseous fuel, for example methane or LPG, contained in a tank conformed like a cylinder 3.
  • a gaseous fuel for example methane or LPG
  • the cylinder 3 is housed in a base 4 of the apparatus 1.
  • the base 4 is intended to be rested on a support surface, for example a floor or the ground.
  • the base 4 is delimited by a lateral wall, having for example an axially-symmetrical geometry, in which a door is obtained which can be selectively opened or closed so as to introduce a new cylinder 3 into the base 4, or to remove an empty cylinder 3 from the base 4.
  • the lateral wall of the base 4 can be made of semi- transparent material, for example, polymeric semi- transparent material.
  • the apparatus 1 further comprises a tubular element 5 suitable for receiving and containing a flame generated by the burner 2.
  • the tubular element 5 extends along an axis Z which, during operation of the apparatus 1, is substantially vertical.
  • the tubular element 5 is arranged above the burner 2, so that the flame generated by the burner 2, which naturally tends to rise upwards, extends within the tubular element 5.
  • the tubular element 5 can be made of transparent material, particularly glass, so that the flame contained inside it is visible by an observer.
  • the tubular element 5 has a circular cross-section, even if other types of cross- section, for example hexagonal, pentagonal or elliptical, can theoretically be adopted.
  • a covering element 6 can be provided, through which the fumes generated by the combustion that takes place in the burner 2 leave the apparatus 1.
  • a protection grid 7 can be arranged around the tubular element 5 and possibly also around the base 4.
  • the protection grid 7 has a conformation that progressively narrows from the base 4 to the covering element 6, so that it looks like a bottle shape, which gives the apparatus 1 a particularly pleasant aesthetic appearance.
  • the protection grid 7 could also be shaped according to shapes different from the one illustrated.
  • the burner 2 supplied by the gaseous fuel contained in the cylinder 3, generates a flame which extends upwards inside the tubular element 5.
  • the flame heats the environment in which the apparatus 1 is inserted, mainly by radiation.
  • the fumes generated by the flame are discharged through the covering element 6.
  • the apparatus 1 further comprises a conversion device 8 for converting a part of the heat generated by the flame into electrical energy.
  • the conversion device 8 may be a Seebeck effect conversion device.
  • the Seebeck effect also called thermoelectric effect, is a phenomenon by means of which, in a circuit made up of metallic conducting materials or semiconductors, a temperature difference generates electricity.
  • a difference of potential is created which causes a passage of electric current in the circuit.
  • the value of the difference of potential thus generated is proportional to the temperature difference between the two junctions and, for metallic materials, it is in the order of a few ⁇ for every degree Kelvin of temperature difference.
  • V S AB x (T 2 - Ti)
  • S AB the Seebeck coefficient of the thermocouple formed by materials A and B, also called thermoelectric power of the thermocouple.
  • the Seebeck coefficient varies with temperature in a non-linear way and depends on the materials that compose the thermocouple, their absolute temperature and their molecular structure.
  • the formula indicated above has been obtained supposing that the Seebeck coefficient can be considered constant in the temperature range at issue.
  • thermoelectric generators so as to produce electrical energy owing to the heat flow between two components placed at different temperatures from each other.
  • the heat is converted directly into electrical energy, without using fluids subjected to thermodynamic cycles and without using moving parts. It is sufficient to position a conversion module or thermoelectric converter which exploits the Seebeck effect (TEGM) between the two components at different temperatures.
  • TEGM Seebeck effect
  • the thermoelectric converter acts in this way like a thermal bridge between the two components and the heat that passes through it is partly converted into electrical energy.
  • the conversion device 8 is interposed between the burner 2 and the tubular element 5, i.e. it is positioned at a lower end of the tubular element 5, so as to interact with the flame generated by the burner 2.
  • the conversion device 8 can be supported by a plate-shaped structure 9, shown in Figures 3 and 4, provided with a central hole through which the flame passes.
  • the support plate 9 is positioned above the burner 2.
  • a perimetric zone of the plate-shaped structure 9, which can be for example circular a plurality of protrusions 10 project, suitable for fastening the plate-shaped structure 9 to the base 4.
  • a covering member 11, shown in Figure 1, is arranged above the conversion device 8 to protect the conversion device 8 from above.
  • the covering member 11 is provided with a central hole through which the flame can pass.
  • the conversion device 8 comprises a plurality of conversion modules 12 distributed around the flame generated by the burner 2.
  • the conversion modules 12 are interposed between a heat capturing element 13, shown in detail in Figure 5, and heat dissipating means.
  • the heat capturing element 13 is positioned so as to be licked by the flame and by the hot gases produced by the combustion which takes place in the burner 2. In this way, the heat capturing element 13 is heated, particularly by convection and radiation, and can transfer the heat received towards the conversion modules 12.
  • the heat capturing element thus allows one side of each conversion module 12 to be kept hot.
  • the heat dissipating means are designed to dissipate heat owing to the contact with the air of the environment in which the apparatus 1 is inserted.
  • the heat dissipating means allow a further side of each conversion module 12 to be kept cool. The temperature difference between the cold side and the hot side of each conversion module 12 is exploited for generating electrical energy.
  • the heat capturing element 13 is designed so as to have a low thermal resistance, in order to minimize the heat losses that occur when heat is transferred from the flame towards a hot side of the conversion module 12.
  • the heat capturing element 13 is further designed so as to guarantee that temperature reached on the hot side of the conversion module 12 is maintained as constant as possible, so that between the two sides of the conversion module there is a high temperature difference .
  • the heat capturing element 13 acts as a thermal filter or thermal flywheel, attenuating or limiting any heat peaks that could excessively heat the conversion module 12 and damage it, by exceeding the maximum operating temperature thereof.
  • the heat capturing element 13 can be made of a metallic material, for example aluminum.
  • the heat capturing element 13 comprises an annular element 15, shown in Figure 5, inside which at least one passage opening 16 is defined for the flame.
  • a plurality of fins project from a lateral surface of the annular element 15 towards the inside of the annular element 15, so as to increase the contact surface between the material that forms the heat capturing element 13 and the flame or the combusted gases.
  • the fins of the heat capturing element 13 can comprise a plurality of main fins 17, between which a plurality of secondary fins 18 is interposed, the secondary fins 18 being shorter than the main fins 17.
  • the main fins 17 and/or the secondary fins 18 can extend radially into the annular element 15.
  • three main fins 17 are provided, angularly equidistant around the axis Z.
  • the main fins 17 have respective ends which reach the axis Z, so that the main fins 17 touch each other at the centre of the annular element 15.
  • three passage openings 16 are defined, each passage opening 16 extending between two consecutive main fins 17.
  • the main fins 17 can however be shorter than shown in Figure 5, so that they do not touch each other in the centre of the annular element 15.
  • a single passage opening 16 is defined inside the annular element 15 .
  • two secondary fins 18 are provided between two main consecutive fins 17. Therefore, in total six secondary fins 18 are provided.
  • the number, the arrangement and the shape of the main fins 17 and the secondary fins 18 can however differ from what has been previously described.
  • the annular element 15 is delimited by an external lateral surface on which at least one abutment surface 19 is obtained against which a conversion module 12 can be pushed.
  • the abutment surface 19 is shaped like a flat surface, which during operation of the apparatus 1 can extend in a vertical plane.
  • more than one abutment surfaces 19 are provided, so that more than one conversion modules 12 can be arranged against the annular element 15.
  • three conversion modules 12 are distributed around the heat capturing element 13, so as to be angularly equidistanced .
  • the external lateral surface of the annular element 15 can have a hexagonal shape, so that six flat surfaces are defined on it. Each of these flat surfaces can be indifferently used as an abutment surface 19. During operation, three flat surfaces of the annular element 15 restingly receive the conversion modules 12 and act as abutment surfaces 19. Two adjacent abutment surfaces 19 are separated by flat surfaces that remain inactive, that is, they do not interact with the conversion modules 12.
  • the conversion modules 12 can be positioned on the flat surfaces behind which the main fins 17 project. In this way, the amount of heat transmitted to the conversion modules 12 of the heat capturing element 13 is maximised.
  • a ring 21 can be fixed to the heat capturing element 13, so that, between the centring edge 20 and the ring 21, an annular housing is defined in which the lower end of the tubular element 5 can be received.
  • the conversion modules 12 are of the known type, normally available on the market. Inside the conversion modules 12 there are joints between different materials (for example materials A and B in Figure 2), which generate electrical energy by the Seebeck effect.
  • the conversion modules 12 are chosen so as to be structurally, chemically and physically stable when subjected to normal operating conditions. Hypothesising that at the centre of the flame the temperatures are in the order of 900°C, the temperature on the hot side of a conversion module 12, i.e. on the side facing the heat capturing element 13, can realistically be estimated as approximately 280-300°C. The temperature on the cold side of a conversion module 12, i.e. on the side facing the heat dissipating element 14, can realistically be estimated as approximately 80-100°C. For these temperature differences, conversion modules 12 can be used based on alloys of semiconductors in the Bi 2 Te 3 class.
  • conversion modules 12 based on alloys in the lead- tellurium class (PbTe, which allow higher temperatures to be reached on the hot side, up to approximately 450°C), or in the magnesium or manganese silicide class (Mg 2 Si or MnSi, which allow temperatures of up to approximately 500°C to be reached on the hot side), or germanium silicide (SiGe, which allows temperatures of up to approximately 750 °C to be reached on the hot side) .
  • PbTe lead- tellurium class
  • Mg 2 Si or MnSi magnesium or manganese silicide class
  • germanium silicide SiGe, which allows temperatures of up to approximately 750 °C to be reached on the hot side
  • the conversion modules 12 can also be equipped with protective shells which maintain an atmosphere of inert gas around the materials between which the Seebeck effect occurs, in order to protect such materials from negative effects of oxidation and sublimation at high temperatures .
  • each conversion module 12 can be connected in series or in parallel with an unillustrated electric circuit.
  • the heat dissipating means comprise a plurality of heat dissipating elements 14, one of which is shown in detail in Figure 6.
  • three heat dissipating elements 14 are provided, each of which engages with a conversion module 12. It is however possible to provide a number of heat dissipating elements 14 different from three.
  • Each heat dissipating element 14 comprises an abutment face 23 adapted to be pushed against the conversion module 12.
  • the abutment face 23 is flat and, during operation, is positioned in a vertical plane.
  • dissipating fins 24 From a region of the heat dissipating element 14 opposite the abutment face 23, i.e. placed behind the abutment face 23, an arrangement of dissipating fins 24 projects, suitable for being operatively positioned in a region further away from the flame than the abutment face 23.
  • the dissipating fins 24 are thus licked by the ambient air, which cools the dissipating fins 24, that would otherwise tend to be heated by the heat yielded by the flame.
  • the dissipating fins 24 comprise two primary fins 25, which form an angle ranging for example from 80 to 130° between each other.
  • a plurality of lateral fins 26 project from each primary fin 25.
  • the heat dissipating elements 14 can be obtained by cutting existing profiled bars to a desired length, the existing profiled bars being provided with their own fin system. Alternatively, the heat dissipating elements 14 can be manufactured on the basis of a specific design.
  • the heat dissipating elements 14 are made with a material that has a low thermal resistance, for example aluminum, so as to dissipate heat efficiently. In this way, the heat dissipating elements 14 guarantee that on the cold side of the conversion module 12 the lowest temperature possible, close to that of the surrounding environment, is reached and maintained, so that between the hot side and the cold side of the conversion module 12 there is a high thermal gradient.
  • the heat dissipating elements 14 are also able to attenuate or limit temporary temperature peaks on the cold side of the conversion module 12, which could damage the latter.
  • the conversion device 14 further comprises a first interface element 27 interposed between the heat capturing element 13 and the conversion module 12.
  • the first interface element 27 can have the shape of a sheet interposed between the abutment surface 19 and the hot side of the conversion module 12.
  • a second interface element 28 is interposed between the conversion module 12 and the heat dissipating element 14.
  • the second interface element 28 can have the shape of a sheet positioned between the cold side of the conversion module 12 and the abutment face 23 of the heat dissipating element 14.
  • the interface elements 27, 28 have the purpose of establishing mechanical and thermal continuity between the heat capturing element 13 and the hot side of the conversion module 12, and also between the heat dissipating element 14 and the cold side of the conversion module 12. Owing to the interface elements 27, 28, heat can be transferred uniformly from the heat capturing element 13 to the conversion module 12 and from the latter to the heat dissipating element 14. It is further possible to uniformly distribute the pressure with which the conversion module 12 is clamped between the heat capturing element 13 and the heat dissipating element 14.
  • first interface element 27 and the second interface element 28 are chosen according to the respective operating temperatures.
  • first interface element 27 can be made with a natural graphite-based material.
  • the second interface element 28 can however be made with a paraffin-based phase-change material (PCM) .
  • PCM paraffin-based phase-change material
  • the apparatus 1 further comprises a fixing system through which each heat dissipating element 14 pushes the corresponding conversion module 12, interposed between the interface elements 27, 28, against the respective abutment surface 19.
  • the fixing system comprises a fixing device 29 for each conversion module 12, the fixing devices 29 being independent from each other.
  • each fixing device 29 comprises a bracket 30, for example, L-shaped, suitable for being fixed to the plate-shaped structure 9 by means of one or more unillustrated fixing elements that engage in at least one fixing hole 31 in the bracket 30.
  • the fixing device 29 further comprises a presser element suitable for exerting a pressure against the heat dissipating element 14.
  • the presser element can comprise an elastic element 32, for example a helical torsion spring, assembled in an end region of a threaded pin 33 by means a nut and a washer.
  • the threaded pin 33 engages in turn in a threaded hole obtained in the bracket 30.
  • the nut and the washer ensure that the elastic element 32 is kept away from the bracket 30. In this way, the elastic element 32 is pushed in contact with a central portion of the heat dissipating element 14, so that the latter pushes the conversion module 12, with the interposition of the interface elements 27 and 28, against the abutment surface 19.
  • control unit controls the conversion device 8 and the additional devices that operate with the electrical energy generated by the conversion device 8.
  • the electrical energy produced by the conversion device 8 is used to supply any additional device that needs electrical energy in order to operate.
  • the additional device can comprise a lighting device arranged to generate light in an portion of space adjacent to the apparatus 1.
  • the lighting device can comprise a plurality of LEDs 34, one of which is visible in Figure 3, positioned for example along a lower perimetric zone of the plate- shaped structure 9. In this way the LEDs 34 allow the base 4 of the apparatus 1 to be illuminated. Since the base 4 is made of a semi-transparent or translucent material, the observer perceives both the light given off by the flame, and the light that illuminates the base 4, obtaining a very pleasant aesthetic impression.
  • the lighting device can comprise, instead of the LEDs 34, one or more light sources of another type.
  • the lighting device can be arranged in positions different from that shown in Figure 3.
  • the lighting device could be assembled on the covering element 6, or on a lower wall of the base 4.
  • the lighting device works owing to the electrical energy generated by the conversion device 8, without needing any connections to the main electricity network or batteries.
  • the lighting device allows a part of the heat emitted by the flame to be recovered, which would otherwise be dispersed.
  • FIG 7 shows a central portion of an apparatus 101 according to an alternative embodiment.
  • the parts of the apparatus 101 common to the apparatus 1 shown in Figures 1 to 6 will be indicated with the same reference number used in Figures 1 to 6, preceded by the figure "1", and will not be described again in detail.
  • the apparatus 101 comprises a heat generator including for example a gas burner 102, suitable for being supplied with the gas contained in an unillustrated cylinder, which reaches the burner 102 through a supply conduit 140.
  • the burner 102 generates a flame which extends upwards inside a tubular element 105.
  • a conversion device 102 is interposed between the heat generator and the tubular element 105 for converting a part of the heat produced by the heat generator into electrical energy.
  • the conversion device 108 comprises a heat capturing element 113, suitable for being positioned at a lower end of the tubular element 105 so as to be licked by the flame and by the gases produced by combustion.
  • the heat capturing element can comprise an annular element inside which a plurality of fins are arranged.
  • the conversion device 108 further comprises a plurality of heat dissipating elements 114, distributed around a heat capturing element 113.
  • Each heat dissipating element 114 can be provided with dissipating fins that extend towards the outside with respect to the heat capturing element 113.
  • a thermal conversion module 112 is interposed, with the possible interposition of interface elements.
  • a fixing device 129 pushes each heat dissipating element 114 against the heat capturing element 113, so that the corresponding thermal conversion module 112 is compressed between the heat dissipating element 114 and the heat capturing element 113.
  • Inside the apparatus 101 an inlet path is defined through which an air flow, coming from the environment in which the apparatus 101 is installed, is sent towards the heat generator to act as a comburent .
  • the air flow contains the oxygen necessary for combustion to take place in the burner 102.
  • the inlet path is indicated by the arrows PI in Figure 7.
  • Each heat dissipating element 114 is positioned along the inlet path PI upstream of the burner 102, so that the air coming from the environment, before interacting with the burner 102 that heats it, comes into contact with the heat dissipating element 114. Consequently, the heat dissipating element 114 cools down by transferring heat to the air flow directed towards the burner 102.
  • a temperature can thus be maintained that is lower than that which there would be if the heat dissipating element 114 were not cooled by the air flow directed towards the burner 102. In this way, with the same temperature on the hot side of the conversion module 112, it is possible to obtain a higher temperature difference between the hot side and the cold side, hence increasing the efficiency of the conversion of heat into electrical energy.
  • the air enters the burner at a higher temperature than the temperature that air would have if it did not interact with the heat dissipating element 114, which allows the combustion effectiveness to be increased (regeneration) .
  • the lower support element 141 is provided with a central opening to allow the burner 102 to be connected to the cylinder.
  • the lower support element 141 can support the fixing devices 129.
  • the covering member 111 is provided with a central hole through which the flame passes.
  • an open lateral strip 142 is defined, through which the inlet air flow can pass which, before reaching the burner 102, licks the heat dissipating elements 114. This allows the heat dissipating elements 114 to be cooled particularly simply, without consuming energy and without complicating the structure of the apparatus 101 with the addition of a ventilator.
  • the inlet path PI shown in Figure 7 can also be provided in the heating apparatus 1 shown in Figures 1 to 6.
  • the apparatus can comprise a ventilation device to convey cold air from the surrounding environment towards the heat dissipating elements.
  • the ventilation device can be powered by electrical energy produced by means of the conversion device.
  • the ventilation device can be arranged upstream of the open lateral strip 142, so as to force the air along the path PI. It is however also possible to provide a ventilation device that conveys a cold air flow towards the heat dissipating element along a path different from the path PI shown in Figure 7, possibly without interacting with the heat generator. In other words, the heat dissipating element could also be cooled by an air flow that does not act as a comburent .
  • the heating apparatus can comprise a ventilator arranged to convey the air heated by the heat generator into a desired zone of the environment in which the apparatus is installed.
  • the ventilator can be powered by the electrical energy produced by the conversion device.
  • the ventilator can be provided in addition to or instead of the lighting device .
  • the ventilator could be positioned at an upper end of the tubular element in which the flame is contained, so as to convey downwards the heated air which naturally tends to go upwards. This would allow hot air to be sent back towards a zone where people stay, limiting the amount of hot air dispersed upwards into regions in which the heat cannot be exploited.
  • the ventilator could be positioned in place of the covering element 6, or immediately above the covering element 6, or even around the covering element 6.
  • the ventilator could be of the Coanda effect type. This type of ventilator is particularly suitable for being assembled at the upper end of the tubular element because, being free from revolving blades, it does not interfere excessively with the fumes coming out of the tubular element.
  • Figures 12 and 13 show a central portion of a heating apparatus similar to the apparatus shown in Figures 1 to 6.
  • the apparatus in Figures 12 and 13 comprises an unillustrated base, inside which a cylinder is housed, and an unillustrated burner supplied with the gas contained in the cylinder.
  • a tubular element 405 is provided, in which a flame extends generated by the combustion that takes place in the burner.
  • the tubular element 405 can be made of glass and is similar to the tubular element 5 shown in Figure 1.
  • the tubular element 405 extends around an axis Z which, during operation, is arranged in a vertical position.
  • a ventilator 451 is positioned at the base of the tubular element 405, the ventilator 451 having a circular structure extending around the axis Z.
  • the ventilator 451 can comprise a rotatable structure including an annular support 470, which supports a plurality of blades 471 which project towards the outside of the annular support 470.
  • the blades 471 can be tilted with respect to a radial direction of the annular 470.
  • the blades 471 can be tilted backwards with respect to a rotation direction R of the annular support 470.
  • a rotation device allows the rotatable structure of the ventilator 451 to turn around the axis Z.
  • the rotation device can comprise a motor 472, positioned close to the annular support 470, in a peripheral position with respect to the axis Zl.
  • the motor 472 rotates a driving wheel 473, which in turn rotates the annular support 470.
  • the driving wheel 473 can rotate the annular support 470 simply by friction, or owing to unillustrated transmission means, for example toothed transmission means.
  • Two support wheels 474 are also provided, that can be freely rotatable, on which the annular support 470 rests.
  • the support wheels 474 and the driving wheel 473 are arranged equidistanced around the axis Zl.
  • the axes of the aforementioned wheels can form 120° angles between each other.
  • the motor 472 like the rotation pins of the wheels 473, 474, are fixed with respect to a frame of the heating apparatus .
  • a deviating element 475 can be present, having for example the shape of a perforated plate with a central zone that projects upwards.
  • the deviator element 475 allows an air flow to be deviated, according to the description below.
  • a further tubular element 476 is arranged around the tubular element 405, so that between the tubular element 405 and the further tubular element 476 an interspace is defined.
  • the tubular element 476 can be made of a transparent material, so that the flame is visible.
  • the further tubular element 476 can be absent.
  • a deflecting element 477 can be positioned at the base of the further tubular element 476.
  • the deflecting element 477 can be shaped like a perforated plate, a central portion of which projects upwards so as to connect with the base of the further tubular element 476.
  • the rotatable structure of the ventilator 451 has the shape of a circular crown and the motor 472 is arranged peripherically with respect to the axis Z, inside the rotatable structure of the ventilator 451 a space is defined in which a conversion device 408 can be housed, the conversion device 408 being similar to the conversion device 8 described previously.
  • the conversion device 408 can comprise a heat capturing element 413 and one or more heat dissipating elements 414, between which one or more conversion modules are arranged .
  • the conversion device 408 converts the heat produced by the flame into electrical energy, which is used to drive the ventilator 451 and, optionally, also a lighting system.
  • the electrical energy produced by the conversion device 408 powers the motor 472, which rotates the annular support 470 and the blades 471 supported by it.
  • the blades suck a hot air flow F10 from above, said air flow being previously heated by the flame.
  • the hot air flow F10 is thus attracted downwards passing outside the tubular element 405.
  • the hot air flow F10 passes into the interspace defined between the tubular element 405 and the further tubular element 476, if present.
  • the hot air flow F10 is deviated by the deviating element 475 and the deflector element 477 and is diffused towards the environment to be heated, following radial and approximately horizontal paths, as indicated by the arrows Fll in Figure 12.
  • the hot air flow is thus brought back to the level of the people who can be found around the heating apparatus.
  • the ventilator 451 can further allow a cold air flow F20 to be sucked from below, the cold air flow F20 licking the dissipating elements 414, allowing their temperature to be reduced and hence increasing the effectiveness of the conversion.
  • FIG 10 shows a heating device 301 according to another alternative embodiment.
  • the heating apparatus 301 shown in Figure 10 differs from the heating apparatus 301 shown in Figures 1 to 6 because it comprises a conversion device 308 arranged in a different position.
  • the conversion device 308 is positioned in an upper end region of the heating apparatus 301.
  • the conversion device 308 can be supported by a covering element 306 of the apparatus 301.
  • the covering element 306 is in turn positioned at an upper end of a tubular element 306, into which the flame extends.
  • the conversion device 308 comprises a heat capturing element 313 suitable for being heated by the flame and fumes produced by combustion before they leave the apparatus 301.
  • the heat capturing element 313 can be positioned in a central region of the covering element 306, so as to be located above the upper end of the tubular element 305.
  • the heat capturing element 313 can comprise a block of metallic material, for example aluminum, having for example a parallelepiped shape, fixed to an upper surface of the covering element 306.
  • the conversion device 308 further comprises a pair of heat dissipating elements 314, arranged at two opposite parts of the heat capturing element 313.
  • Each heat dissipater 314 is provided with a plurality of fins 317 which extend towards a peripheral region of the covering element 306, so as to dissipate heat into the surrounding environment.
  • a conversion module 312 is interposed, similar to the conversion modules 12 disclosed with reference to Figures 1 to 6.
  • a first interface element 327 is interposed between a conversion module 312 and the heat capturing element 313.
  • a second unillustrated interface element can be interposed between each conversion module 312 and the heat dissipating element 314.
  • a fixing system allows the two heat dissipating elements 314 to be fixed to each other and to keep the conversion modules 312 still.
  • the fixing system comprises a fixing pin 333 suitable for being positioned above the heat capturing element 313 so that each end of the fixing pin 333 passes through a through hole obtained in a heat capturing element 313.
  • a fixing nut 370 engages with each end of the fixing pin 333.
  • the presser element 332 allows pressure to be exerted on the heat dissipating element 314, so that the heat dissipating element 314 pushes the conversion module 312, with any interface elements, against the heat capturing element 313.
  • Each conversion module 312 is thus compressed between the corresponding heat dissipating element 314 and the heat capturing element 313.
  • the heat capturing element 313 is heated by receiving heat from the flame and especially from the fumes that rise to be discharged into the environment through the upper end of the tubular element 305.
  • the heat capturing element 313 heats the hot side of each conversion module 312.
  • the side of each conversion module 312 opposite the hot side is instead kept at a lower temperature owing to the corresponding heat dissipating element 314.
  • each conversion module 312 Owing to the temperature difference between the hot side and the cold side of each conversion module 312, it is possible to generate electricity by the Seebeck effect.
  • the electricity thus generated can be used for many functions, for example, for powering a lighting device, possibly similar to the one described with reference to Figures 1 to 6, or for powering a ventilator, or for electrically powering other accessory devices.
  • the energy provided by the conversion device can be used for powering an ignition device which allows the fuel, particularly gaseous, to be burned, for starting the heat generator.
  • the ignition device can be a device that generates sparks able to burn the gas supplied towards the burner.
  • a control element can be provided, particularly configured as a valve, to control the passage of gas from the tank towards the burner.
  • the valve can take on a maximum opening position, a closing position, and one or more intermediate positions suitable for allowing passage of different amounts of gas for varying the thermal power of the apparatus.
  • the conversion device can be used for opening or closing the valve and for keeping the valve in an open position, so as to avoid using batteries that would have to be periodically replaced.
  • FIG 8 shows a heating apparatus 201 according to an alternative embodiment.
  • the heating apparatus 201 is suitable for heating an internal environment, for example, a room of a house or an office.
  • the heating apparatus 201 can be classified in the category of convectors .
  • the apparatus 201 comprises unillustrated anchoring means that allow the apparatus 201 to be fixed to a wall 250, for example to a vertical wall.
  • the apparatus 201 comprises a ventilation device 251, arranged for taking air from the environment in which the apparatus 201 is installed through an inlet opening 252 which can be provided with a grate 253.
  • the ventilation device 251 can be arranged in a lower region of the apparatus 201.
  • the ventilation device 251 conveys the air into a casing 254 of the apparatus 201 along a path P2.
  • the apparatus 201 further comprises a heat generator arranged inside the casing 254 along the path P2 for heating the cold air conveyed by the ventilation device 251.
  • the heat generator can comprise a burner 202, for example supplied with a gas.
  • the burner 202 is adjacent to a heat exchanger 255, shown in detail in Figure 9, in which the fumes deriving from the combustion that takes place in the burner 202 transfer heat to the cold air that the ventilation device 251 has taken from the environment.
  • the air is thus heated, after which it can be reintroduced into the environment along an outlet path P3, for example, through a grate element 256.
  • the latter can be arranged in an upper region of the apparatus 201. In this way, the air heats the environment in which the apparatus 201 is installed.
  • the heat exchanger 255 comprises a tubular component 257 into which the flame produced by the burner 202 extends.
  • the heat exchanger 255 further comprises an outlet manifold 258 in which the fumes that have transferred heat to the air are collected.
  • the outlet manifold 258 communicates with an unillustrated chimney through an outlet hole 259, through which the fumes can be discharged.
  • an exchange region 260 is interposed in which the fumes transfer heat to the air.
  • the fumes are therefore generated inside the tubular component 257, after which they rise through the exchange region 260 until they reach the outlet manifold 258, as shown by the arrows P4.
  • first fins 261 can project, which extend from a lateral wall 262 of the heat exchanger 255. From the lateral wall 262 a plurality of second fins 263 can also project, towards the outside of the exchange region 260.
  • the first fins 261 allow the surface area of the heat exchanger 255 in contact with the fumes to be increased, whereas the second fins 263 allow the surface area in contact with the air to be heated to be increased.
  • a conversion device 208 is assembled on the heat exchanger 255, particularly in a lower region of the heat exchanger 255, so as to be close to the burner 202.
  • the conversion device 208 comprises at least one conversion module 212, similar to the conversion modules 12, 112 and 312 previously described, in which a part of the heat generated by the burner 202 can be converted into electrical energy.
  • the conversion module 212 is interposed between the lateral wall 262 of the heat exchanger 255 and a heat dissipating element 214.
  • the heat dissipating element 214 can comprise one or more dissipating fins 224 that project from an abutment wall 223, suitable for being pressed against the conversion module 212, with possible interposition of an interface element .
  • the first fins 261 could be omitted, in which case only the portion of the lateral wall 262 adjacent to the conversion module 212 would act as a heat capturer.
  • An unillustrated fixing device keeps the heat dissipating element 214 pressed against the conversion module 212. The latter is hence compressed between the lateral wall 262 and the heat dissipating element 214.
  • the heat dissipating element 214 is arranged along the path P2 of air which must be heated by the heat exchanger 255.
  • the side of the conversion module 212 facing the lateral wall 262 is heated owing to the flame contained in the tubular component 257 and the hot fumes circulating in the exchange region 260. In this way, the side of the conversion module 212 facing the lateral wall 262 reaches and maintains a high temperature.
  • the side of the conversion module 212 facing the heat dissipating element 214 is instead kept at a low temperature owing to the air conveyed by the ventilation device 251, which removes heat from the heat dissipating element 214.
  • the electrical energy thus obtained can be used to power the ventilation device 251, without using batteries or connections to the main electricity network.

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  • 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)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Cookers (AREA)

Abstract

La présente invention concerne un appareil comprenant : un générateur de chaleur (2; 102) permettant de générer de la chaleur pour chauffer un environnement, une base (4) appropriée pour loger un réservoir (3) de combustible destiné au générateur de chaleur (2; 102); un élément tubulaire (5; 105; 305; 405) constitué d'un matériau transparent et positionné au-dessus du générateur de chaleur (2; 102) pour contenir une flamme générée par le générateur de chaleur (2; 102); un dispositif de conversion (8; 108; 308; 408) servant à convertir une partie de la chaleur générée par le générateur de chaleur (2; 102) en énergie électrique.
PCT/IB2012/055202 2011-09-28 2012-09-28 Dispositif de chauffage WO2013046174A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO2011A000248 2011-09-28
IT000248A ITMO20110248A1 (it) 2011-09-28 2011-09-28 Apparato di riscaldamento.

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PCT/IB2012/055202 WO2013046174A1 (fr) 2011-09-28 2012-09-28 Dispositif de chauffage

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Cited By (1)

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EP3155326A4 (fr) * 2014-06-10 2018-01-24 Wet Enterprises, Inc., DBA Wet Design Dispositif de chauffage avec présentation de flamme

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RU2697406C1 (ru) * 2018-10-01 2019-08-14 Сергей Вениаминович Нечаев Устройство для подогрева воздуха
RU2752443C1 (ru) * 2020-12-09 2021-07-28 Гритчин Владимир Валериевич Конвектор

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US6588419B1 (en) 2002-06-10 2003-07-08 Honeywell International Inc. Fireplace insert thermally generating electrical power useful for operating a circulating fan
US20040261780A1 (en) * 2003-06-24 2004-12-30 Toby Frink Indoor/outdoor patio heater fire sculpture
WO2006103613A2 (fr) 2005-03-29 2006-10-05 Koninklijke Philips Electronics N.V. Cuisiniere amelioree
US20070221200A1 (en) 2006-03-27 2007-09-27 Landon Richard B Self powered latent heat capturing device
GB2451521A (en) 2007-08-03 2009-02-04 Alpine Energy Ltd Heater with Combustion Chamber and Thermoelectric Powered Blower
EP2071244A1 (fr) * 2007-12-11 2009-06-17 Italkero S.R.L. Appareil de chauffage par convection comprenant une chambre transparente pour la combustion et pour l'admission d'air
US20110032969A1 (en) 2009-08-10 2011-02-10 John Lee Warren Method and apparatus for generating electricity using ambient heat
US20110076627A1 (en) * 2008-12-08 2011-03-31 Diventura Louis Heater apparatus

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Publication number Priority date Publication date Assignee Title
US6422232B1 (en) * 2000-05-26 2002-07-23 The Coleman Company, Inc. Heater with light
US6588419B1 (en) 2002-06-10 2003-07-08 Honeywell International Inc. Fireplace insert thermally generating electrical power useful for operating a circulating fan
US20040261780A1 (en) * 2003-06-24 2004-12-30 Toby Frink Indoor/outdoor patio heater fire sculpture
WO2006103613A2 (fr) 2005-03-29 2006-10-05 Koninklijke Philips Electronics N.V. Cuisiniere amelioree
US20070221200A1 (en) 2006-03-27 2007-09-27 Landon Richard B Self powered latent heat capturing device
GB2451521A (en) 2007-08-03 2009-02-04 Alpine Energy Ltd Heater with Combustion Chamber and Thermoelectric Powered Blower
EP2071244A1 (fr) * 2007-12-11 2009-06-17 Italkero S.R.L. Appareil de chauffage par convection comprenant une chambre transparente pour la combustion et pour l'admission d'air
US20110076627A1 (en) * 2008-12-08 2011-03-31 Diventura Louis Heater apparatus
US20110032969A1 (en) 2009-08-10 2011-02-10 John Lee Warren Method and apparatus for generating electricity using ambient heat

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3155326A4 (fr) * 2014-06-10 2018-01-24 Wet Enterprises, Inc., DBA Wet Design Dispositif de chauffage avec présentation de flamme
US10101036B2 (en) 2014-06-10 2018-10-16 Wet Heater with flame display

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ITMO20110248A1 (it) 2013-03-29
WO2013046179A1 (fr) 2013-04-04

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