A device for liquid fuel evaporation and subsequent combustion of vapors

Abstract

The invention relates to a field of heating, and it concerns naked flame devices e.g., decorative fireplaces, which utilize a liquid vegetal fuel and provide its evaporation followed by combustion of vapors. The device for liquid fuel evaporation and subsequent combustion of vapors comprises a housing having a side surface and a bottom surface, a burner that is a plate with openings, an evaporator having an enclosed inner volume, a liquid fuel distributor, a heat-resistant porous material, and an evaporator heating tool. Openings of the liquid fuel distributor are made with identical diameter and located along a length of a hollow body with a pitch that is decreased from a coupling location between the liquid fuel distributor and a fuel pipe towards an end of the hollow body, or they are spaced apart with identical pitch, while their diameters are increased from the coupling location between the liquid fuel distributor and the fuel pipe towards the end of the hollow body. Owing to the claimed device, reliability and safety of its operation in the fireplace are increased, compactness of this device and effectiveness of combustion of the liquid fuel are increased.

Description

[0001] A DEVICE FOR LIQUID FUEL EVAPORATION AND SUBSEQUENT COMBUSTION OF VAPORS

[0002] FIELD OF THE INVENTION

[0003] The invention relates to a field of heating, in particular, to a structure of naked flame devices, e.g. decorative fireplaces, which operate with a liquid vegetal fuel and provide its evaporation followed by combustion of vapors.

[0004] PRIOR ART

[0005] A problem related to this type of devices is that the evaporation is usually carried out within one volume of the device, while the combustion of the produced gases is performed within another volume of the device. It causes a need in mounting an additional chamber to maintain a fuel level for evaporation wherefrom the produced fuel vapors must be supplied to the device for combustion of the fuel vapors (a burner). In view of the individual additional evaporation chamber and its communication with the burner for supplying the fuel vapors, operation reliability of the device and its safety are reduced, the device structure becomes more complicated in view of the requirement in additional elements and communications therebetween. While fireplaces which operate with the liquid vegetal fuel, e.g., bioethanol (ethanol fuel), and their use for furnishing private houses become more widespread, a problem of improving the devices for evaporation of the liquid fuel followed by combustion of the vapors which are used in the fireplace structure, in particular, for increasing operational reliability and safety of these devices, becomes rather actual. Similar devices which are used in the fireplaces for evaporating the liquid fuel followed by combustion of vapors are known, among which the following ones are the closest.

[0006] Invention patent US8622053B2 dated January 7, 2014 teaches a liquid fuel- fired furnace installation comprising a fuel tank, a fuel evaporation plate, a fuel vapor distribution plate, a pipeline connecting the fuel tank to the evaporation plate, a vapor outlet furnished on the evaporation plate, a vapor flow cut-off valve connected to the vapor outlet, an external heating plate furnished at the evaporation plate, a fuel inlet for ignition installed at the external heating plate, an inlet stub pipe connected to the fuel vapor distribution plate, wherein the fuel vapor distribution plate is connected with the inlet stub pipe, shaped holes disposed in an upper part of the fuel vapor distribution plate, wherein the fuel vapors are exhausted through the shaped holes, a second fuel tank disposed in parallel to the first fuel tank, a pipe conduit connecting the second fuel tank to the first fuel tank, wherein the evaporation plate and the distribution plate are placed between the first fuel tank and the second fuel tank, a metering pump furnished to the first tank near the fuel inlet, a trough-shaped heating plate installed under the fuel inlet, a wick is located at the trough-shaped heating plate, and all mentioned sub-assemblies are closed in the shield with ventilation slots. A drawback of this technical solution is division of the fuel evaporation and combustion process which results in reduced efficiency and reliability, as well as affects sizes of the structure which may be inconvenient and even may limit a place for mounting the fireplace.

[0007] Also, a patent EP2807424B1 dated November 9, 2016 teaches an electronically controlled burner configured to combust bioethanol, the electronically controlled burner comprises at least one fuel tank being in fluid communication with an evaporation accelerator being in thermal contact with a heating element configured to heat and hereby evaporate fuel in the evaporation accelerator, a flame tray having an ignition member configured to ignite vapor delivered from the evaporation accelerator, wherein the electronically controlled burner comprises at least one fuel pump configured to pump the fluid fuel from the at least one fuel tank to the evaporation accelerator, where the burner comprises means for actively emptying the evaporation accelerator, wherein the means for actively emptying the evaporation accelerator is one or more pumps, and wherein a first fuel pump is configured to pump fuel from a first fuel tank into the evaporation accelerator, preferably in a first mode, and where the first fuel pump or a second fuel pump is configured to pump fuel from the evaporation accelerator into the first fuel tank or into a second fuel tank, preferably in another mode. A drawback of this technical solution is division of processes of evaporation and combustion of the fuel which results in reduced efficiency and more complex control of the system. Due to presence of the additional pumps for pumping the fuel between the tanks, as well as due to the necessity in the additional heating of the evaporator, it is possible that the fuel consumption and maintenance complexity will be increased.

[0008] Also, a patent PL215376B1 dated November 29, 2013 is close to the present invention, and it teaches a device for combustion of a liquid fuel, particularly, in liquid fuel combustion fireplaces, the device consists of a fuel tank having an outlet that is connected, via a pipe, to a heating chamber that is connected to a distribution chamber provided with a plurality of openings, wherein the fuel tank is provided, in its top portion, with a fuel filling opening that is closed with a cover having a ventilation opening, a bottom portion of the fuel tank has an outlet nozzle mounted therein that is equipped with a pipe for supplying the fuel to the heating chamber that is provided with an electrical heater with a thermocouple, wherein the heating chamber is directly connected to the distribution chamber in a form of a pipe that is closed on both sides and is provided, in its top portion, with a plurality of openings, and the fuel tank is arranged relative to the heating chamber so that the heating of fuel in the heating chamber is carried out below a fuel level.

[0009] A drawback of this technical solution is that the fuel in this device is firstly evaporated in the heating chamber and then it is supplied to the distribution chamber for combustion which results in inefficient use of the fuel. Division of these two processes causes inefficient use of the fuel and increase of energy consumption for both processes which results in increase of the fuel consumption and reduction of the overall efficiency of the system. Also, this arrangement results in increase of a number of parts and complexity of the device, thereby affecting the sizes of the device. The patented structure restricts possibilities of creation of different embodiments of the fireplace. This may result in narrowing possible choices for users which search for more innovative and efficient liquid fuel combustion devices.

[0010] SUMMARY OF THE INVENTION

[0011] The invention is based on a task to develop a device for liquid fuel evaporation and subsequent combustion of vapors which may be used in a fireplace, while at the same time allowing to increase its operation reliability and safety, as well as to increase a compactness of this device due to combining both a process of producing liquid fuel vapors and a process of their subsequent combustion during burning within a single device.

[0012] Said task is resolved by providing a device for liquid fuel evaporation and subsequent combustion of vapors, the device comprises a housing having a side surface and a bottom surface, a burner that is a plate with openings, an evaporator having an enclosed inner volume formed by the plate of the burner, the side surface and the bottom surface of the aforementioned housing, a fuel vapors ignition tool, a fuel pipe, a liquid fuel distributor is arranged within said enclosed inner volume of the evaporator, the liquid fuel distributor is coupled to the fuel pipe and is made as an elongated hollow body with openings provided primarily in a top portion of the body along its length, a heat-resistant porous material layer and an evaporator heating tool are arranged under the liquid fuel distributor on the bottom surface of the housing, the evaporator heating tool is arranged on an external or inner side of the bottom surface of the housing within an arrangement area of the liquid fuel distributor, and the openings of the liquid fuel distributor are made with identical diameter and arranged along a length of the hollow body with a pitch that is decreased from a coupling location between the liquid fuel distributor and the fuel pipe towards an end of the hollow body, or they are spaced apart with identical pitch and their diameters are increased from the coupling location between the liquid fuel distributor and the fuel pipe towards the end of the hollow body.

[0013] A technical effect achieved by using the invention is a combination of a location of evaporation of the liquid fuel and further combustion of the produced fuel vapors within a single structural element being the device for liquid fuel evaporation and subsequent combustion of vapors, thereby allowing to increase the operation reliability of the fireplace and its compactness owing to reduction of additional elements and communications for their interconnection. An additional effect is increase of a number of possible variants of structures of the fireplace and, thus, variants of visual appearance, where the device for liquid fuel evaporation and subsequent combustion of vapors could be used, according to the invention, i.e., increase of structural flexibility of the fireplace for embedding the claimed device that is achieved also due to compactness of the device and combination of the fuel vapors production and combustion processes within a single volume. Another additional effect is increase of cost effectiveness of the liquid fuel combustion due to the heating of the evaporator and the enclosed volume therein for producing the fuel vapors occur in the claimed device, i.e., the fuel evaporation temperature is maintained by the vapors combustion process itself that is started directly after evaporation, thereby avoiding a mandatory use of a tool for heating the evaporator for maintaining the evaporation process, thereby allowing to reduce the fuel and electricity consumption. Another additional technical effect has been achieved by inventors already in the process of testing the fireplace, wherein the claimed device is used, and it lies in providing a flame having a more red color spectrum that is close to the spectrum of colors which occur during burning of the wood, rather than orange one as provided in the known analogues which also operate with the liquid vegetal fuel. This effect may be caused by the fact that the vapors in the claimed device have higher temperature which affects the flame color.

[0014] At the same time, during testing of the device in the fireplace structure, a problem during supplying the liquid fuel for the evaporation via the hollow body of the liquid fuel distributor has been found, and this problem was in that the fuel came to the heat-resistant porous material layer in a non-uniform fashion. Most of the liquid fuel came to those portion of the layer of the heat-resistant porous material that was closer to the coupling location between the liquid fuel distributor and the fuel pipe, i.e., predominantly all the fuel came out of the openings at the beginning of the hollow body that is closer to the fuel pipe, while the fuel almost did not come to the openings at the end of the hollow body. This resulted in nonuniformity of the fuel saturation of the layer of the heat-resistant porous material along its area and, thus, in instable evaporation process. Increase of the supplied volume of the liquid fuel or its head flow through the hollow body resulted in excessive saturation of this layer and falling of the liquid fuel outside this layer, as well as in increase of the fuel consumption. In order to resolve this problem, numerous tests have been conducted and it has been proposed either to make the openings of the liquid fuel distributor having the identical diameter, but located along the length of the hollow body non-uniformly, namely, with the pitch that is decreased from the coupling location between the liquid fuel distributor and the fuel pipe towards the end of the hollow body, or to arrange the openings spaced apart with the identical pitch, while their diameters are increased from the coupling location between the liquid fuel distributor and the fuel pipe towards the end of the hollow body.

[0015] It has been found that this embodiment of the liquid fuel distributor has enabled to saturate the layer of the heat-resistant porous material with the liquid fuel uniformly and in the required volume which has increased the stability of the evaporation process and uniformity of the vapors output across the entire area of the burner which has increased the overall operation reliability and safety of both the device and the fireplace.

[0016] According to one of preferable embodiments of the device, the openings are provided in the burner at a distance of 5-70 mm between each other. This arrangement of the openings is optimal for producing a stable flame having various configuration. The flame having various configuration is achieved due to alteration of the arrangement of the openings across the burner area, but within said limits, in particular, a uniform arrangement of the openings across the area of the burner plate provides a uniform distribution of the flame across the entire burner area, while a random arrangement of the openings across the area of the burner plate, but within the defined limits, provides a non-uniform flame that imitates a natural fire flame.

[0017] Additional advantage provided by the combination of the liquid fuel evaporation and further combustion of the produced vapors within the single device, according to the invention, is ability to supply the liquid fuel both from the fuel container embedded into the fireplace and from a replaceable container, e.g., a canister, which may be disposed outside the fireplace as well. If the embedded container is meant, the advantage will lie in that this container may have any size and it may be disposed in various locations relative to the device for liquid fuel evaporation and subsequent combustion of vapors. The known analogues, where the evaporator and the fuel container form interconnected volumes, does not provide this ability. If the replaceable external container is meant, the advantage will lie in that the refueling for this fireplace is not required at all. When the fuel in the removable container is run out, it will be replaced with a full container.

[0018] According to another preferable embodiment of the device, the openings provided in the burner have a diameter of 1.2-2.5 mm. This range of the diameters of the openings of the burner has been defined experimentally as an optimal one for discharge of the fuel vapors in terms of simultaneous production of the stable flame in a required amount and safe combustion of the vapors. Owing to providing the burner with the openings of smaller diameter, it results to reduction of the amount of the fuel vapors for combustion and production of the flame of an insufficient height, as well as in a possibility of accumulation of the fuel vapors within the inner volume of the evaporator and decrease of the usage safety of the device, while owing to providing the burner with the openings of greater diameter, it results in an opposite effect being a very quick output of the fuel vapors and a possibility of their excessive accumulation above the burner followed by ignition with a specific pop sound.

[0019] According to one of preferable embodiments of the device, the evaporator heating tool is arranged under the bottom surface of the housing within an area of the heat-resistant porous material layer or on the bottom surface of the housing within an area of the heat-resistant porous material layer, thereby increasing rate and efficiency of the heating of the heat-resistant porous material layer for producing the fuel vapors, as well as further heating the liquid fuel in the liquid fuel distributor before its supply to the heat-resistant porous material layer, thereby simplifying the fuel evaporation process and further facilitating the increase of energy efficiency of this process.

[0020] According to one of preferable embodiments of the device, the liquid fuel distributor is made as at least one straight or horizontally bent tube, thereby structurally simplifying the liquid fuel supply to the heat-resistant porous material layer.

[0021] According to one of preferable embodiments of the device, a diameter of the tube of the liquid fuel distributor is 4-8 mm, thereby allowing to supply a required volume of the liquid fuel to the heat-resistant porous material layer in order to provide a stable evaporation process, while at the same time to optimize the fuel consumption.

[0022] According to one of preferable embodiments of the device, a diameter of the openings of the tube of the liquid fuel distributor is 1-2 mm, thereby further facilitating to obtain a stable evaporation process and optimization of the fuel consumption together with the above-mentioned range of the diameter of this tube.

[0023] According to one of preferable embodiments of the device, the fuel vapors ignition tool is arranged outside the enclosed volume of the evaporator in a close proximity to the the fuel vapors output opening, thereby simplifying the initiation of the combustion process and increases the operation safety of the device.

[0024] According to one of preferable embodiments of the device, the latter comprises a fire sensor, thereby increasing the operation safety of the device. The fire sensor may be made using prior art devices such as infrared LEDs.

[0025] According to one of preferable embodiments of the device, the latter comprises a temperature sensor for controlling a temperature of the evaporator, thereby also increasing the operation safety of the device, as well as its energy efficiency by controlling the temperature of the evaporator and periodical use of the evaporator heating tool in order to maintain the stable liquid fuel evaporation process.

[0026] BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Exemplary embodiments of the inventive device for liquid fuel evaporation and subsequent combustion of vapors are illustrated in the figures, where:

[0028] Fig. 1 illustrates a general axonometric exploded view of the device,

[0029] Fig. 2 illustrates a top view of the device,

[0030] Fig. 3 illustrates the section A-A of the Fig. 3,

[0031] Fig. 4 illustrates a side view of the device,

[0032] Fig. 5 illustrates the section B-B of the Fig. 4,

[0033] Fig. 6 illustrates a general axonometric view of the device embedded into the fireplace,

[0034] Fig. 7 illustrates a general axonometric view of the device according to one of embodiments thereof that is embedded into the fireplace, Fig. 8 illustrates a side view of the device according to one of embodiments thereof illustrated in Fig. 7,

[0035] Fig. 9 illustrates the section C-C of the Fig. 8,

[0036] Fig. 10 illustrates a top view of the device according to one of embodiments thereof illustrated in Fig. 7,

[0037] Fig. 11 illustrates the section D-D of the Fig. 10,

[0038] Fig. 12 illustrates a general axonometric view of the device according to another embodiment thereof that is embedded into the fireplace,

[0039] Fig. 13 illustrates a top view of the device according to one of embodiments thereof illustrated in Fig. 12.

[0040] The provided examples and figures do not limit other possible embodiments of the invention, rather they merely explain its essence and confirm the possibility of implementation thereof.

[0041] Main designations:

[0042] 1. device housing,

[0043] 2. burner,

[0044] 3. evaporator,

[0045] 4. fuel vapors ignition tool,

[0046] 5. fuel pipe,

[0047] 6. liquid fuel distributor,

[0048] 7. heat-resistant porous material layer,

[0049] 8. evaporator heating tool,

[0050] 9. fire sensor,

[0051] 10. temperature sensor,

[0052] 11. side surface of the housing,

[0053] 12. bottom surface of the housing,

[0054] 13. openings of the burner,

[0055] 14. inner volume of the evaporator,

[0056] 15. openings of the liquid fuel distributor, 16. pump for supplying the fuel to the fuel pipe,

[0057] 17. control circuit board,

[0058] 18. fireplace housing.

[0059] IMPLEMENTATION OF THE INVENTION

[0060] A device for liquid fuel evaporation and subsequent combustion of vapors (hereinafter referred to as the device) comprises a housing (1), a burner (2), an evaporator (3), a fuel vapors ignition tool (4), a fuel pipe (5), a liquid fuel distributor (6), a heat-resistant porous material layer (7), an evaporator heating tool (8), a fire sensor (9) and a temperature sensor (10). In the embodiment of the device illustrated in Fig. 1-6, the housing (1) has a volumetric cylindrical shape that is exposed on the top having a side surface (11) and a bottom surface (12). In the embodiments of the device illustrated in Fig. 7-13, the housing (1) has a volumetric parallelepiped shape having the side surface (11) and the bottom surface (12).

[0061] The burner (2) is a plate with openings (13). The openings (13) are provided at a distance 5-70 mm between each other and are made with a diameter 1.2-2.5 mm. The openings may be arranged uniformly across an area of the plate of the burner (2) as in the embodiment of the cylindrical housing illustrated in Fig. 1-6 with the circular plate of the burner (2). The embodiment of the device illustrated in Fig. 7-11 is characterized by using the burner (2) having a rectangular plate and random arrangement of the openings (13) across its area. The embodiment of the device illustrated in Fig. 12, 13 is characterized by using the burner (2) having a narrow plate that is extended along a length of the housing (1) and by arrangement of the openings (13) along the length of this plate in line. This burner (2) may have not only the shape of the linear straight line as illustrated in Fig. 12, 13, but also a linear shape in a form of an arc, a broken line, an enclosed figure etc.

[0062] The evaporator (3) comprises an enclosed inner volume (14) that is formed by the plate of the burner (2), the side surface (11) and the bottom surface (12) of the housing (1). The liquid fuel distributor (6) that is coupled to the fuel pipe (5) is arranged in the inner volume (14) of the evaporator (3). The liquid fuel distributor (6) is an elongated hollow body having openings (15) which are provided predominantly in a top portion of the body along its length. According to the embodiment of the device illustrated in Fig. 1-6, the liquid fuel distributor (6) is made as a tube that is bent in a horizontal plane. According to the embodiment of the device illustrated in Fig. 9, the liquid fuel distributor (6) is made as a straight tube. The same shape of the tube of the liquid fuel distributor (6) is also used for the embodiments of the device illustrated in Fig. 12, 13. The diameter of the tube of the liquid fuel distributor (6) is 4-8 mm, and the diameter of the openings (15) is 1-2 mm. The openings (15) may have identical diameter and arranged along the length of the tube of the liquid fuel distributor (6) with a pitch that is decreased from a coupling location between the liquid fuel distributor and the fuel pipe (5) towards an end of the tube of the liquid fuel distributor (6). This embodiment is illustrated in Fig. 5 or Fig. 9. As another embodiment, the openings (15) may be spaced apart with the same pitch. Therewith, the diameter of the openings (15) is increased from the coupling location between the liquid fuel distributor (6) and the fuel pipe (5) towards the end of the tube of the liquid fuel distributor (6). The fuel pipe (5) is coupled, on one side, to the tube of the liquid fuel distributor (16) and, on another side, to the pipe (16) for supplying the fuel to the fuel pipe which may be provided in the fireplace, where the described device is installed.

[0063] The heat-resistant porous material layer (7) is arranged below the liquid fuel distributor (6) on the bottom surface (12) of the housing (1). The evaporator heating tool (8) is arranged on the outer or inner side of the bottom surface (12) of the housing (1) in a location area of the tube of the fuel distributor (6) and within the area of the heat-resistant porous material layer (7). As another embodiment, the evaporator heating tool (8) may be arranged below the bottom surface (12) of the housing (1). A tubular electric heater (TEH) may be used as the evaporator heating tool (8), and its shape is caused by the shape of the housing (1) and of the heat- resistant porous material layer (7), i.e., if the housing (1) has the cylindrical shape and the heat-resistant porous material layer (7) has the circular shape, the tubular electric heater may be made in a spiral shape, while if the housing (1) has the parallelepiped shape and the heat-resistant porous material layer (7) has the rectangular shape, the tubular electric heater may be made in a shape that is elongated along the length of the housing (not illustrated in Fig.).

[0064] The fuel vapors ignition tool (4) is arranged outside the enclosed inner volume (14) of the evaporator (3) in the close proximity to the fuel vapors output opening, preferably, in the area of the plate of the burner (2) or closely above it. An ignition strand or another similar tool, e.g., a piezoelectric element etc., may be used as the fuel vapors ignition tool (4). The temperature sensor (10) is intended to control the temperature of the evaporator (3) and is configured to transmit a data to the control circuit board (17). The control circuit board (17) is configured to receive the data, in particular, from the fire sensor (9) and the temperature sensor (10), as well as to control, based on the received data, the operation of the pump (16) to supply the liquid fuel to the fuel pipe (5), to turn on and off the fuel vapors ignition tool (4) and the evaporator heating tool (8).

[0065] The device for liquid fuel evaporation and subsequent combustion of vapors operates in the following way.

[0066] The above-described device may be embedded into a thermally insulated housing (18) of the fireplace. The liquid vegetal fuel, e.g., bioethanol, is supplied by means of the pump (16) from the replaceable canister or the fuel tank embedded into the fireplace via the fuel pipe (5) to the liquid fuel distributor (6). Amount and time for supplying the fuel portions are adjusted automatically by means of the control circuit board (17). The fuel from the liquid fuel distributor (6), via the openings (15), comes to the heat-resistant porous material layer (7) and fills it along the entire area. At the same time, the evaporator (3) with the enclosed inner volume (14) and the heat-resistant porous material layer (7) inside the same is heated by means of the evaporator heating tool (8) until the fuel boiling temperature is achieved. After the fuel got on the hot surface, it is converted to a gaseous state. The formed fuel vapors come out from the enclosed inner volume (14) upwards via the openings (13) of the burner outside and are ignited by means of the vapors ignition tool (4) followed by combustion of the fuel vapors and providing the stable burning process above the surface of the burner (2). Then, the evaporator (3) with the enclosed inner volume (14) and the heat-resistant porous material layer (7) inside the same is heated due to the burning process, and evaporator heating tool (8) may be turned off. The fuel supply to the heat-resistant porous material layer (7), the heating of the evaporator (3) and the ignition of the fuel vapors are controlled by the control circuit board (17) based on the data from the fire sensor (9), the temperature sensor (10), a fuel presence or level sensor which is provided in a liquid fuel supply system which does not constitute the subject matter of the present invention.

[0067] Therefore, owing to the claimed device for liquid fuel evaporation and subsequent combustion of vapors, the reliability and safety of its operation in the fireplace are increased, the compactness of this device and effectiveness of combustion of the liquid fuel are increased.

Claims

CLAIMS1. A device for liquid fuel evaporation and subsequent combustion of vapors, the device comprises a housing (1) having a side surface (11) and a bottom surface (12), a burner (2) that is a plate with openings (13), an evaporator (3) having an enclosed inner volume (14) formed by the plate of the burner (2), the side surface (11) and the bottom surface(12) surface of the aforementioned housing (1), a fuel vapor ignition tool (4), a fuel pipe (5), a liquid fuel distributor (6) is arranged within said enclosed inner volume (14) of the evaporator, the liquid fuel distributor is coupled to the fuel pipe (5) and is made as an elongated hollow body with openings (15) provided primarily in a top portion of the body along its length, a heat-resistant porous material layer (7) and an evaporator heating tool (8) are arranged under the liquid fuel distributor (6) on the bottom surface (12) of the housing (1), the evaporator heating tool is arranged on an external or inner side of the bottom surface (12) of the housing (1) within an arrangement area of the liquid fuel distributor (6), and the openings (15) of the liquid fuel distributor (6) are made with identical diameter and arranged along a length of the hollow body with a pitch that is decreased from a coupling location between the liquid fuel distributor (6) and the fuel pipe (5) towards an end of the hollow body, or they are spaced apart with identical pitch and their diameters are increased from the coupling location between the fuel distributor (6) and the fuel pipe (5) towards the end of the hollow body.

2. The device according to claim 1, wherein the openings (13) are provided in the burner (2) at a distance of 5-70 mm between each other.

3. The device according to claim 1, wherein the openings (13) provided in the burner (2) have a diameter of 1.2-2.5 mm.

4. The device according to claim 1, wherein the evaporator heating tool (8) is arranged under the bottom surface (12) of the housing (1) within an area of the heat-resistant porous material layer (7).

5. The device according to claim 1, wherein the evaporator heating tool (8) is arranged on the bottom surface (12) of the housing (1) within an area of the heat-resistant porous material layer (7).

6. The device according to claim 1, wherein the liquid fuel distributor (6) is made as at least one straight or horizontally bent tube.

7. The device according to claim 6, wherein a diameter of the tube of the liquid fuel distributor (6) is 4-8 mm.

8. The device according to claim 7, wherein a diameter of the openings (15) of the tube of the liquid fuel distributor (6) is 1-2 mm.

9. The device according to claim 1, wherein the fuel vapors ignition tool (4) is arranged outside the enclosed volume (14) of the evaporator in a close proximity to the openings (13) of the burner.

10. The device according to claim 1, wherein it comprises a fire sensor (9).

11. The device according to claim 1 , wherein it comprises a temperature sensor (10) for controlling a temperature of the evaporator (3).

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