JP2006281077A - Flue gas filtering device for heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flue gas filtering device for heaters which is capable of reducing the burden of the installation work of a flue and of surely reducing the installation cost of a flue. <P>SOLUTION: The flue gas filtering device for heaters is installed on the flue 3 extending to the outside ER2 from a wood stove 2, filters the flue gas generated upon burning the material to be burned at the wood stove and cleans the flue gas. Odor and unburnt gas molecules can be removed from the flue gas to surely discharge odorless, transparent and colorless flue gas not only at the time of the complete combustion but also at the ignition time or at the time of the minimum combustion when relatively a large amount of smoke is easily generated. Thus, the installation of the flue 3 extending to the upper part of a roof H2 is eliminated and the burden of the installation work of the flue 3 is reduced, thereby surely reducing the cost of the installation work of the flue 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a flue gas filtering device for a heater, and is suitable for application to an indoor heater that is installed indoors such as a wood stove or a fireplace.

In recent years, instead of kerosene, which is commonly used, a wood stove using wood as a fuel has attracted attention from the standpoint of resource saving and the like. By the way, in a soot stove using such soot as a fuel, it is difficult to completely burn the fuel, and the flue gas contains a lot of unburned gases such as fine particles of wood components such as cellulose and lignin and non-burnable ash. There was a problem that smoke with odor and the like was generated during complete combustion. For this reason, in such a wood stove, a secondary combustion chamber having a catalyst is provided in the combustion chamber, and the combustion in the secondary combustion chamber is promoted to prevent combustion gas from being generated during complete combustion. What is designed to obtain is known (for example, refer to Patent Document 1).
JP 2000-46334 A

  By the way, the wood stove with such a structure is designed to prevent smoke from being generated during complete combustion, but in fact, a small amount of smoke is generated even during complete combustion, especially during ignition and More smoke is generated at the time of minimum combustion than at the time of complete combustion. For this reason, in the wood stove, it is necessary to install a flue that extends to the upper part of the roof in order to efficiently discharge the smoke outdoors. As a result, the installation cost of the flue is large and the flue is installed. Since the work is also performed at a high place, there is a problem that the installation work becomes complicated.

  Therefore, in view of the above-described problems, the present invention has an object to provide a flue gas filtering device for a heater that can reduce the burden of the flue installation work and can surely reduce the flue installation work cost.

  In order to achieve the above object, an invention according to claim 1 is directed to an exhaust gas generated when a combustible is burned in an indoor installation type heater attached to a flue extending outside from the indoor installation type heater. It is characterized by filtering the smoke and purifying the flue gas.

  Moreover, the invention which concerns on Claim 2 is provided with the heat exchanger which collect | recovers exhaust heat from the said flue gas.

  The invention according to claim 3 includes a creosote collection structure.

  The invention according to claim 4 is provided with a filtration filter for filtering the flue gas, and the filtration filter is configured to be detachable.

  The invention according to claim 5 is characterized by comprising a discharge fan for discharging the flue gas in the flue to the outdoors.

  The invention according to claim 6 is characterized by comprising a control unit for controlling the rotation of the discharge fan.

  The invention according to claim 7 includes an auxiliary power supply unit that starts power supply to the discharge fan instead of the main power supply unit when power supply from the main power supply unit to the discharge fan is stopped. It is characterized by that.

  Moreover, the invention which concerns on Claim 8 has a structure which can be directly mounted | worn also to the said indoor installation type heater.

  According to the first aspect of the present invention, the flue gas is filtered, so that the odor and unburned gas molecules can be removed from the flue gas. Even when igniting or minimally igniting, it is possible to reliably discharge smoke that is odorless and colorless and transparent, so it is possible to avoid installing a flue that extends above the roof, thus installing a flue The burden of work can be reduced and the installation work cost of the flue can be surely reduced.

  According to the second aspect of the present invention, the exhaust heat is recovered by the heat exchanger, so that the exhaust heat can be reused for other purposes.

  According to the invention described in claim 3, creosote generated in the process of burning soot can be easily recovered, so that soot can be burned efficiently.

  In addition, according to the invention described in claim 4, since the filtration filter is configured to be detachable, the filtration filter can be replaced at a predetermined time, thereby extending the service life of the heater flue gas filtration device itself. Can do.

  In addition, according to the invention described in claim 5, since the smoke exhausted in the indoor heater can be forcibly discharged to the outdoors, it is possible to prevent the smoke exhaust from flowing into the room and to ensure the exhaust of smoke. Can be filtered.

  According to the invention described in claim 6, since the rotation of the exhaust fan can be adjusted in accordance with the amount of smoke generated in the indoor heater, wasteful power consumption in the exhaust fan can be reduced. Can be prevented.

  According to the seventh aspect of the present invention, even when the power supply from the main power supply unit is stopped due to a power failure or the like, the auxiliary power supply unit is provided so that the power supply from the auxiliary power supply unit The exhaust fan can be continuously driven to rotate, and thus the smoke generated in the indoor heater can be reliably discharged to the outdoors.

  Further, according to the invention described in claim 8, even if it cannot be mounted on the flue, it can be mounted on the indoor heater itself, so that it is possible to reliably filter the flue gas, and thus, from the flue gas, odor and Combustion gas molecules can be removed.

  A preferred first embodiment of the present invention will be described below with reference to the drawings.

(1) 1st Embodiment FIG. 1 shows the wood stove with a flue gas filtering function according to the first embodiment as a whole, and this wood stove 1 with a flue gas filtering function is hermetically sealed installed in an indoor ER1. -Type stove 2, flue 3 that guides the flue gas generated when burning the soot in this wood stove 2 to the outdoor ER 2, and a chamber-type heater flue gas filter installed in the flue 3 4.

  The wood-burning stove 2 as an indoor heater is configured so as to heat the indoor ER1 by putting the wood in a cylindrical furnace body 5 and burning it. Incidentally, the furnace body 5 has an air supply part for supplying air from the outside of the furnace body 5, a partition part (not shown) for partitioning the inside of the furnace body 5, and the like, and an upper space formed by the partition part. In the secondary combustion chamber (not shown), unburned gas generated in the primary combustion chamber in the lower space is burned and burned in the furnace body 5 by an ash receiving portion (not shown) arranged in the bottom space. It is designed to receive and store straw ash. A catalyst may be provided in the secondary combustion chamber, and unburned gas may be burned using this catalyst.

  In addition to this configuration, the root portion 6 of the flue 3 is connected to the furnace body upper part 5A, and the flue gas generated in the furnace body 5 is guided to the flue 3.

  The flue 3 extends substantially vertically upward from the furnace body 5 to a predetermined height, and then bends to the wall H1 side of the house H so as to penetrate the wall H1 so that the tip 7 is located at the outdoor ER2. It is formed and has a configuration in which the heater flue gas filtering device 4 is mounted at a location extending substantially horizontally.

  The heater flue gas filtering device 4 includes a flue gas filtering unit 10 provided in an indoor ER1 and a flue gas fan unit 12 supported by a column 11 in an outdoor ER2 and attached to a tip 7 of a flue 3. The smoke exhaust fan unit 12 is supplied with power from an outlet connected to a commercial AC power source via a plug (not shown).

  Thus, the heater flue gas filtering device 4 rotationally drives the exhaust fan 9 in the flue gas fan unit 12, whereby the flue gas in the furnace body 5 passes through the flue 3 in the flue gas filter unit 10. Can be discharged from the smoke exhaust fan section 12 to the outdoor ER2.

  As shown in FIG. 2, the flue gas filtering unit 10 includes a hollow portion 14 in a box-shaped housing 13, and an introduction port 15 and a discharge port 16 formed so as to face the housing 13. Communicates with the flue 3, whereby exhausted smoke is discharged from the discharge port 16 through the introduction port 15 and the hollow portion 14.

  Here, the hollow portion 14 is provided with a plurality of detachable plate-shaped filter filters 17 made of fiber members such as glass cloth and carbon cloth, and the smoke exhausted from the inlet 15 After passing sequentially, it can be discharged from the discharge port 16. At this time, the filter 17 can capture fine particles of wood components such as cellulose and lignin, non-burning ash, etc. contained in the flue gas, and remove odors and unburned gas molecules from the flue gas.

  In this embodiment, the case where the filtration filter 17 made of a fiber member such as glass cloth or carbon cloth is applied has been described. However, the present invention is not limited thereto, and powder such as pumice, red balls, and sand is used. It is also possible to use a filter made of a filter, or a filter made by mixing a fiber material such as glass cloth and a powdered material such as pumice (that is, mixing different filter materials). A plurality of filtration filters may be provided alternately and sequentially. In this case, since different filter media are used, even if odors and unburned gas molecules that could not be removed by one filter media are present in the flue gas, they can be reliably removed by a filter filter made of another filter media. Thus, it is possible to further reliably discharge smoke which is odorless and colorless and transparent to the outside air.

  The housing 13 of the flue gas filtration unit 10 is provided with a door (not shown) that can be freely opened and closed, and the filter 17 provided inside the housing 13 is exchanged via the door. Has been made to get.

  By the way, the smoke exhaust fan unit 12 includes an operation unit and a control unit (not shown), and when the rotation speed is set by the operation unit, the control unit controls the rotation of the discharge fan 9 and thereby the flue. The amount of flue gas introduced from 3 into the flue gas filtration unit 10 can be adjusted. In other words, the control unit can increase the amount of smoke introduced into the flue gas filtering unit 10 by increasing the rotational speed of the discharge fan 9 according to the setting of the operation unit, and thus the flue gas is exhausted in the furnace body 5. Even if a large amount of gas is generated, the odor and gas molecules of the flue gas can be reliably removed by the filter 17. On the other hand, the control unit can reduce the amount of smoke introduced into the flue gas filtering unit 10 by slowing the rotational speed of the exhaust fan 9 according to the setting of the operation unit. The rotation of the discharge fan 9 can be set according to the amount of generated smoke.

  In addition to this configuration, the heater flue gas filtering device 4 includes an auxiliary power source (not shown), and when the supply of power from the commercial AC power source to the smoke exhaust fan unit 12 is stopped, the commercial AC Instead of the power supply, power can be supplied from the auxiliary power supply unit.

  In the above configuration, in the soot stove 1 with the smoke filtering function, soot is combusted in the furnace body 5 and the discharge fan 9 is rotationally driven at a predetermined rotational speed. Thus, in the wood stove 1 with the flue gas filtering function, the flue gas generated in the furnace body 5 at the time of combustion is forced to the flue gas filtering part 10 by the discharge fan 9 via the flue 3 of the upper part 5A of the furnace body. Can lead. At this time, the flue gas always passes through the filtration filter 17 in the flue gas filtration unit 10, so that fine particles of wood components such as cellulose and lignin, incombustible ash, and the like are removed by the filtration filter 17. That is, the heater flue gas filtering device 4 can always remove odors and unburned gas molecules from the flue gas through the filter 17 so that ignition is relatively easy to generate a large amount of smoke as well as during complete combustion. It is possible to reliably discharge smoke that is odorless and colorless and transparent even at the time of combustion or during minimum combustion.

  If a large amount of smoke is generated in the furnace body 5 at this time, the user removes the smoke to be introduced into the smoke filter unit 10 by increasing the rotational speed of the discharge fan 9 via the operation unit. The amount of exhaust gas can be increased to prevent the flue gas from flowing into the indoor ER1, and the flue gas filtering unit 10 can reliably filter the flue gas.

  On the other hand, when a small amount of smoke is generated in the furnace body 5, the user exhausts at the smoke filter unit 10 by slowing the rotational speed of the discharge fan 9 via the operation unit. Smoke can be reliably filtered and wasteful power consumption by the discharge fan 9 can be prevented.

  In addition, since the smoke exhaust fan unit 12 includes the auxiliary power supply unit, even if the supply of power from the commercial AC power source as the main power supply unit is stopped due to a power failure or the like, the auxiliary power supply unit By receiving the supply of electric power, the rotation can be reliably continued.

  Incidentally, the smoke filter unit 4 for the heater is configured such that the smoke filter unit 10 and the smoke fan unit 12 are configured separately, and the smoke filter unit 10 is provided in the indoor ER1, thereby filtering the filter. 17 can be easily replaced, and noise generation by the discharge fan 9 can be prevented in the indoor ER1 by providing the smoke exhaust fan section 12 in the outdoor ER2.

  According to the above configuration, in this embodiment, the flue gas that is attached to the flue 3 extending from the wood stove 2 to the outdoor ER 2 and burns firewood as a combustible material in the wood stove 2 is filtered. The flue gas was cleaned. By filtering the flue gas in this way, it is possible to remove odors and unburned gas molecules from the flue gas, thereby enabling not only complete combustion but also relatively easy to generate a large amount of smoke at the time of ignition or minimum combustion Even so, it is possible to reliably discharge smoke that is colorless and transparent without odors, so it is possible to avoid the installation of a flue that extends above the roof H2 (Fig. 1), thus reducing the burden of installing the flue 3 While being able to reduce, the installation work cost of the flue 3 can be reduced reliably.

  In addition, a filter 17 for filtering the flue gas is provided, and the filter 17 is configured to be detachable so that the filter 17 can be freely replaced at a predetermined time, and thus the flue gas filter for a heater is used. The service life of the device 4 itself can be extended.

  Furthermore, by providing a discharge fan 9 for discharging the flue gas in the flue 3 to the outdoor ER2, it is possible to forcibly discharge the flue gas generated in the wood stove 2 to the outdoor ER2, thus indoors. While it is possible to reliably prevent the exhaust gas from flowing into ER1, the exhaust gas filtering unit 10 can reliably filter the exhaust gas.

  Further, by providing a control unit that controls the rotation of the discharge fan 9, the rotation of the discharge fan 9 can be adjusted according to the amount of smoke generated in the wood stove 2, and thereby the discharge fan 9 can prevent wasteful power consumption and efficiently filter the flue gas and discharge it to the outside air.

  In addition, by providing an auxiliary power supply unit that starts supplying power to the discharge fan 9 in place of the main power supply in the event of a power failure, etc., even if there is a power failure, the power supply from the auxiliary power supply unit causes the discharge. The fan 9 can be continuously driven to rotate, and thus the exhaust gas generated in the wood stove 2 can be reliably discharged to the outdoor ER2.

(2) Second Embodiment In FIG. 3, in which parts corresponding to those in FIG. 1 are denoted by the same reference numerals, 50 indicates a wood stove with smoke filtering function according to the second embodiment as a whole. The wood heating stove 50 with the smoke filtering function includes a wood heating stove 2 installed in the indoor ER1, a flue 51 that guides the flue gas generated when burning wood in the wood heating stove 2 to the outdoor ER2, and the flue 51 It is comprised from the outdoor installation-type heater flue gas filtration apparatus 53 which is mounted | worn with the front-end | tip part 52 of this, and is installed in outdoor ER2. In addition, since it overlaps about description of the part corresponding to 1st Embodiment mentioned above, it abbreviate | omits.

  Here, the flue 51 extends substantially vertically upward from the furnace body 5 to a predetermined height, then bends to the wall H1 side of the house H, penetrates the wall H1 and extends substantially vertically downward in the outdoor ER2. It has a configuration in which a tip 52 is attached to the lower side of the heater flue gas filtering device 53 installed on the ground G.

  As shown in FIG. 4, the smoke extractor device 53 for a heater has a smoke filter unit 55 and a smoke fan unit 56 integrally formed, and the smoke fan unit 56 is located above the smoke filter unit 55. It has an arranged configuration.

  The flue gas filtering part 55 has a hollow part 58 in a box-shaped casing 57, and an introduction port 59 communicating with the flue 51 is formed in a side part 57A on the house H side of the casing 57. An exhaust port 60 communicating with the smoke exhaust fan portion 56 is formed at the top. As a result, the flue gas introduced from the introduction port 59 passes through the hollow portion 58 and is discharged from the smoke exhaust fan portion 56 to the outside air via the discharge port 60.

  The hollow portion 58 is provided with a creosote collection structure 61 for collecting creosote at the bottom. The creosote collection structure 61 receives a liquid containing creosote by a creosote tray 61A, and a housing. The creosote can be collected by pulling out the creosote tray 61A from a door portion (not shown) provided on the 57 so as to be freely opened and closed.

  Incidentally, since the liquid etc. collected by the creosote tray 61A contains the wood acid solution, the wood acid solution can be easily extracted from the liquid. This wood acid solution can be used for soil sterilization, weeding, withering disease, etc., and can also be used for antibacterial activity, deodorant activity, and the like due to synergistic effects with other various organic components.

  The hollow portion 58 is provided with a cooling plate 65 and a heat exchanger 66 in a lower space above it, and a first filter 67 in the upper space.

  A plurality of cooling plates 65 are provided on the inner sides of the opposing side portions 57A and 57B, each tip extends obliquely downward, and the tips are alternately arranged so that the tip does not hit the tip of another cooling plate 65. ing.

  The heat exchanger 66 is arranged at the base of the cooling plate 65, is constituted by a cylindrical pipe in which the antifreeze liquid circulates, and has a configuration connected to a load heating device (not shown). As a result, the heat exchanger 66 can heat the antifreeze circulating inside by the exhaust heat of the flue gas, and the heated antifreeze can flow into the heat radiating pipe embedded in the road (not shown) to warm the road. It is made like that.

  The first filtration filter 67 has a plurality of sheets and is formed in a plate shape by powdery materials such as pumice, red balls, sand, etc., is detachably provided in the hollow portion 58, and is provided in the casing 57 so as to be openable and closable. It is pulled out from a door part (not shown) and can be changed individually. The first filtration filter 67 sequentially passes the exhaust smoke introduced from the inlet 59, captures fine particles of wood components such as cellulose and lignin, non-burning ash, etc. contained in the exhaust smoke, and smells and unburned from the exhaust smoke. Gas molecules can be removed.

  In addition to this configuration, the exhaust port 60 is provided with a second filter filter 68 made of a filter material different from that of the first filter 67. Further, when the exhaust gas passes through the exhaust port 60, exhaust gas is discharged. It can capture fine particles of wood components such as cellulose and lignin, non-burning ash, etc. contained in the smoke, and remove odors and unburned gas molecules from the flue gas. Incidentally, in the case of this embodiment, the second filtration filter 68 is formed of a fiber member such as a glass cloth or a carbon cloth.

  By the way, the smoke exhaust fan unit 56 includes an operation unit, a control unit, and an auxiliary power supply unit as well as the first embodiment described above, and also includes a discharge fan 70. By being rotationally driven, the smoke exhausted from the rotation axis direction (vertical direction) can be discharged to the outside air from the radiation direction (horizontal direction) orthogonal to the rotation axis direction.

  In the above configuration, in the soot stove 50 with the smoke filtering function, soot is combusted in the furnace body 5 and the exhaust fan 70 is rotationally driven at a predetermined rotational speed. As a result, in the wood stove 50 with the flue gas filtering function, the flue gas generated in the furnace body 5 at the time of combustion is sent to the flue gas filtering section 55 of the outdoor ER 2 through the flue 51 of the upper part 5A of the furnace body by the discharge fan 70. Can be forcibly guided. The flue gas passes through between the cooling plates 65 while being heated in the lower space in the flue gas filtration unit 55 while the antifreeze liquid in the heat exchanger 66 is heated, and is guided to the first filtration filter 67. At this time, the heat exchanger 66 has a configuration connected to a road heating device (not shown), so that the heated antifreeze liquid flows into the heat radiating pipe embedded in the road, thereby warming the road. Thus preventing the road from freezing.

  In addition, the flue gas sequentially passes through the first filter 67 in the upper space in the flue gas filtration unit 55, so that the first filter filter 67 allows fine particles of wood components such as cellulose and lignin and non-burnable ash content. Etc. are removed. In other words, the heater flue gas filtering device 53 removes odors and unburned gas molecules from the flue gas through the first filter 67 so that a relatively large amount of smoke is easily generated as well as during complete combustion. It is possible to reliably discharge smoke that is odorless and colorless and transparent even at the time of combustion or during minimum combustion.

  In addition to this, in the flue gas filtering device 53 for the heater, the second filtration filter 68 made of a different filter material from the first filtration filter 67 is provided, so that the first filtration filter 67 can completely remove it. Even if odors and unburned gas molecules that have not existed are present in the flue gas, the second filter 68 can reliably remove the odor, and the colorless and transparent flue gas is more reliably released to the outside air. Can be discharged.

  The basic operation of the operation unit, the control unit, and the auxiliary power supply unit provided in the smoke exhaust fan unit 56 is the same as that in the first embodiment described above, and a description thereof will be omitted.

  According to the above configuration, in this example, in addition to the effect in the first embodiment described above, the heat exchanger 66 that recovers exhaust heat from the smoke is provided, so that the heat exchanger The waste heat recovered by 66 can be reused for road heating.

  Further, by providing the creosote collection structure 61, creosote generated in the process of burning soot can be easily collected, and soot can be burned efficiently.

(3) Third Embodiment In FIG. 5, in which parts corresponding to those in FIG. 1 are assigned the same reference numerals, 80 denotes a wood stove with a smoke exhausting filter function as a whole according to the third embodiment. The smoke stove 80 with smoke filtering function is different from the first embodiment in the arrangement of the smoke exhaust filter 81 for the heater, and the smoke exhaust filter 81 for the heater is directly attached to the wood stove 2 itself, and the indoor ER1 is heated. The entire apparatus for flue gas filtration 81 can be installed. In addition, since it overlaps about description of the part corresponding to 1st Embodiment mentioned above, it abbreviate | omits.

  In this case, the smoke filter unit 81 for the heater is integrated with the smoke filter unit 10 and the smoke fan unit 12, and the lower end of the smoke filter unit 55 is the upper part of the furnace body of the wood stove 2. It can be mounted directly on 5A, and the upper part of the smoke exhaust fan section 12 can be mounted on the root 6 of the flue 3.

  In the above configuration, the smoke extractor 4 for a heater can be directly mounted with the smoke extractor 81 for a heater, in which the smoke filter unit 10 and the smoke fan unit 12 are integrated with the wood stove 2 itself. Even if ER2 has no installation space for the smoke exhaust fan section 12 and the smoke exhaust fan section 12 cannot be attached to the tip 7 of the flue 3, the smoke exhaust fan section 12 can be provided, and thus the wood stove 2 Can be discharged to the outdoor ER2, and can be reliably filtered by the smoke filter section 10.

  In addition, since the smoke extractor 81 for the heater is directly mounted on the wood stove 2 installed in the indoor ER1, the smoke filter 10 and the smoke exhaust fan 12 can also be installed in the indoor ER1, thus working. The person can easily replace the filtration filter 17 in the indoor ER1, and can easily confirm that the discharge fan 9 is rotating.

  Further, in the heater flue gas filtering device 81, the direct attachment to the wood stove 2 itself can prevent the flue gas filtering unit 10 and the flue gas fan unit 12 from being attached to the flue 3, and as a result, Since no load is applied to the flue 3 by the flue gas filtering unit 10 or the flue gas fan unit 12, the burden on the flue 3 can be reduced. Further, the smoke filter device 81 for the heater can be stably installed on the wood stove 2.

  According to the above configuration, in this example, in addition to the effects of the first embodiment described above, the heater flue gas filtering device 81 can be directly mounted on the wood stove 2. As a result, even if the flue gas filtering unit 10 and the flue gas fan unit 12 cannot be attached to the flue 3, the flue gas filtering unit 10 and the flue gas fan unit 12 can be attached to the wood stove 2 itself. Smoke emitted from the stove can be reliably filtered, and thus odor and unburned gas molecules can be removed from the smoke.

  In addition, this invention is not limited to this embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, the heater flue gas filtering device 4, 53 or 81 may be used in various other indoor heaters such as an open wood stove or a fireplace, and heat exchange in the second embodiment described above. The device 66 may be connected to another exhaust heat utilization device such as a roof snow melting device instead of the load heating device.

It is a side view which shows the whole structure of the wood stove with a flue gas filtration function by 1st Embodiment. It is sectional drawing which shows the side cross-section structure of the flue gas filtration part in 1st Embodiment. It is a side view which shows the whole structure of the wood stove with a flue gas filtration function by 2nd Embodiment. It is sectional drawing which shows the side cross-section structure of the flue gas filtration apparatus for heaters in 2nd Embodiment. It is a side view which shows the whole structure of the wood stove with a flue gas filtration function by 3rd Embodiment.

Explanation of symbols

1, 50, 80 Wood stove with smoke filter function 2 Wood stove 3, 51 Flue 4, 53, 81 Smoke exhaust filter for heater 9, 70 Fan for exhaust
17 Filtration filter
61 Creosote collection structure
67 First filtration filter (filtration filter)
68 Second filtration filter (filtration filter)

Claims (8)

  It is mounted on a flue extending from an indoor heater to the outside, and the flue gas generated when burning a combustible with the indoor heater is filtered to clean the flue gas. A flue gas filtering device for heaters.   The exhaust gas filtration apparatus for a heater according to claim 1, further comprising a heat exchanger that recovers exhaust heat from the exhaust gas.   The flue gas filtering device for a heater according to claim 1 or 2, further comprising a creosote collection structure.   The heater flue gas filtering device according to any one of claims 1 to 3, further comprising a filter for filtering the flue gas, wherein the filter is detachable.   The exhaust flue gas filter for a heater according to any one of claims 1 to 4, further comprising a discharge fan for discharging the flue gas in the flue to the outside.   6. The smoke extractor device for a heater according to claim 5, further comprising a control unit that controls rotation of the exhaust fan.   7. An auxiliary power supply unit that starts power supply to the discharge fan instead of the main power supply unit when power supply from the main power supply unit to the discharge fan is stopped. The flue gas filtering device for a heater as described.   The smoke exhausting filter device for a heater according to any one of claims 1 to 7, characterized in that it has a configuration that can be directly mounted on the indoor heater.

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