Heat storage unit for firewood stove

Abstract

To quickly raise temperature in a room installed with a firewood stove, and make firewood materials last long.SOLUTION: A heat storage unit 10 disposed in a combustion chamber 51 of a firewood stove 50 comprises: a heat storage plate 11 configured to cover firewood materials 90 from above; a support part 12 for supporting the heat storage plate 11 in a state of separating from an inner wall 53 of the combustion chamber 51; and an open front face portion 13.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a heat storage unit for a wood stove. [Background technology]

[0002] Patent Document 1 discloses a wood stove. Conventional wood stoves, including the wood stove disclosed in Patent Document 1, include a cast iron stove body having a combustion chamber, and a chimney connected to the stove body and extending upward. The stove body is provided with an inlet for introducing air into the combustion chamber. The wood stove is provided with an air amount adjustment means capable of adjusting the amount of air introduced into the combustion chamber through the inlet. The combustion state of the firewood can be adjusted by adjusting the amount of air supplied to the combustion chamber with the air amount adjustment means. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-20573 A Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional wood stoves, most of the heat generated by the burning of firewood (hereafter referred to as "combustion heat") is discharged to the outside through the chimney. In addition, because the stove body is made of cast iron, which has a large thermal capacity, it takes a long time for the temperature of the stove body to rise due to the combustion heat. For these reasons, there is the problem that it takes a long time for the temperature of the room in which the wood stove is installed to rise.

[0005] On the other hand, if the amount of air introduced into the combustion chamber is increased to promote the combustion of firewood, the temperature of the wood stove will rise temporarily, but the firewood will quickly turn to ash, and new firewood will need to be added. Therefore, there is room for improvement in terms of improving the durability of firewood.

[0006] An object of the present invention is to provide a heat storage unit for a wood stove that can quickly raise the temperature of a room in which a wood stove is installed and can improve the durability of firewood. [Means for solving the problem]

[0007] Various aspects of a heat storage unit for a wood stove to solve the above problems will be described below. [Aspect 1] A heat storage unit disposed in a combustion chamber of a wood stove, When the front-to-back direction of the wood stove is simply defined as the front-to-back direction, A heat storage unit configured to cover the firewood from above; A support portion that supports the heat storage portion in a state spaced apart from an inner wall of the combustion chamber; and an open front portion. Heat storage unit for wood stoves.

[0008] When the firewood is ignited and a pilot flame is formed, the heat generated as the firewood burns (hereinafter referred to as combustion heat) moves upward and is stored in the heat storage section. The heat storage unit is separated from the inner wall of the wood stove's combustion chamber. In addition, between the heat storage unit and the inner wall of the wood stove, there is air with high thermal insulation properties, with a thermal conductivity several thousandths that of metals such as iron. This prevents heat from moving from the heat storage unit to the wood stove, so the temperature of the heat storage unit rises quickly.

[0009] When the temperature of the heat storage section has risen, if new firewood is added onto the pilot light, the new firewood will be heated. When the temperature of firewood is raised to 250 degrees or higher, the pyrolysis reaction of the firewood progresses and combustible gas is generated from the firewood. As the combustible gas approaches the high-temperature heat storage unit, the temperature of the combustible gas rises and the combustible gas begins to burn.

[0010] Here, because the temperature around the combustible gas is high, the combustion of the combustible gas can be maintained even if the amount of air supplied to the combustion chamber is reduced through the existing air volume adjustment means of the wood stove. When the combustible gas burns under high temperature with the amount of air appropriately reduced, a blue flame, i.e., a high-temperature flame, is generated. After the combustion gas stops being generated from the firewood, the carbonized firewood, i.e., charcoal, begins to burn. Charcoal has a longer burning time than firewood.

[0011] After the temperature of the heat storage unit has risen sufficiently, the temperature of the wood stove itself will rise due to the heat received from the combustion gases and smoke, i.e. unburned gases, that are generated by the combustion of combustible gas and firewood. The combustion gases and smoke are exhausted through the open front part of the heat storage unit.

[0012] In this way, the temperature of the heat storage unit can be raised quickly, and the combustible gases generated by the firewood can be burned at high temperatures with an appropriately reduced amount of air. This improves the shelf life of the firewood compared to conventional wood stoves that mainly burn firewood, i.e., those that do not use the heat storage unit configured as described above.

[0013] In addition, by appropriately reducing the amount of air, the amount of smoke emitted from the chimney can be reduced. This reduces the amount of heat exhausted from the chimney and increases the amount of heat remaining in the room, allowing the temperature in the room where the wood stove is installed to rise more quickly.

[0014] In addition, because the front of the heat storage unit is open, the user can easily see the firewood and combustible gas burning through the observation window on the front of the wood stove. In wood stoves with catalysts, the high heat generated by burning combustible gas at high temperatures heats the catalyst, quickly raising its temperature and activating it, allowing secondary combustion by the catalyst to begin early.

[0015] In conventional wood stoves, the large amount of air causes the maximum temperature of the wood stove to increase, and the temperature fluctuation of the wood stove to increase. This can lead to a decrease in the durability of the components that make up the wood stove, especially the body of the wood stove and the catalyst.

[0016] In this regard, with the above-mentioned configuration, the maximum temperature and the amount of temperature change of the wood stove are smaller than when the heat storage unit is not used, which improves the durability of the components that make up the wood stove, especially the wood stove body and the catalyst.

[0017] [Aspect 2] The lower surface of the heat storage unit is inclined so that the front side is positioned higher. 2. The heat storage unit for a wood stove according to claim 1.

[0018] In wood stoves, a part of the primary or secondary air introduced from outside is made to flow downward along the inner surface of the sight glass installed in the front of the wood stove, forming a so-called air curtain to prevent soot from adhering to the sight glass. The secondary air burns the smoke generated during the primary combustion of firewood and combustible gases (secondary combustion).

[0019] With this configuration, the smoke generated by the burning of firewood moves forward along the underside of the heat storage unit and then moves upward through the open front part of the heat storage unit, making it easier for it to react with part of the secondary air flowing downward along the inner surface of the sight glass of the wood stove. This can effectively promote secondary combustion.

[0020] [Aspect 3] A restricting portion is provided which extends downward from the periphery of the heat storage portion and restricts the movement of gas along the lower surface of the heat storage portion. 3. The heat storage unit for a wood stove according to claim 1 or 2.

[0021] According to this configuration, the flow of gas such as smoke along the bottom surface of the heat storage unit is restricted by the restricting portion provided on the periphery of the heat storage unit, so that the combustion heat of the firewood tends to remain directly below the heat storage unit. This allows the temperature of the heat storage unit to rise more quickly.

[0022] [Aspect 4] The support portion extends in the vertical direction and is placed on a bottom portion of the combustion chamber to support the heat storage portion from below. A heat storage unit for a wood stove according to embodiment 3.

[0023] According to this configuration, the heat storage unit can be easily placed in the combustion chamber by placing the support part on the bottom of the combustion chamber of the wood stove. Also, since the heat storage unit can be easily removed from the combustion chamber, maintenance of the wood stove and the heat storage unit can be easily performed.

[0024] [Aspect 5] A loading plate is provided below the heat storage section and supported by the support section, and on which firewood is placed, The mounting plate is A mounting plate body located above a lower end of the support portion; a communication portion that communicates the upper and lower portions of the mounting plate body and protrudes upward from the mounting plate body, A heat storage unit for a wood stove according to embodiment 4.

[0025] In a wood stove, a portion of the primary or secondary air introduced from outside is made to flow downward along the inner surface of a sight glass provided on the front of the wood stove, forming a so-called air curtain to prevent soot from adhering to the sight glass.

[0026] According to the above configuration, a part of the primary air or secondary air forming the air curtain flows into the space formed between the mounting plate and the bottom of the wood stove, and is supplied to the firewood through the communication part that connects the upper and lower parts of the mounting plate body. Since the communication part protrudes upward from the mounting plate body, the communication part is prevented from being blocked by ash generated by the combustion of the firewood or charcoal. In addition, since the primary air or secondary air is heated when passing through the communication part, high-temperature air can be supplied to the firewood. Therefore, the combustion of the firewood or charcoal can be sustained in an optimal manner.

[0027] [Aspect 6] When the direction perpendicular to both the front-back direction and the up-down direction is the width direction, The support portion has two side wall portions extending downward from both sides of the heat storage portion in the width direction, The heat storage unit, the two side walls, and the rear wall unit that covers the area surrounded by the mounting plate from the rear side, The regulating portion is A front extension portion extending downward from a front edge of the heat storage portion; The two side walls; The rear wall portion is provided around the entire periphery of the heat storage portion. A heat storage unit for a wood stove according to embodiment 5.

[0028] According to this configuration, the heat storage unit is formed into a box shape with an opening at the front by the heat storage section, two side walls, a mounting plate, and a rear wall. This makes it difficult for the combustion heat of the firewood to escape, so the temperature of the heat storage section and the firewood located directly below it can be raised quickly. Effect of the Invention

[0029] According to the present invention, the temperature of a room in which a wood stove is installed can be raised quickly and the durability of firewood can be improved. [Brief description of the drawings]

[0030] [Figure 1]FIG. 1 is a perspective view of a heat storage unit for a wood stove according to one embodiment. [Diagram 2] FIG. 2 is a front view of the heat storage unit of FIG. [Diagram 3] FIG. 3 is a cross-sectional view of the heat storage unit taken along line 3-3 in FIG. [Figure 4] FIG. 4 is a cross-sectional view showing the heat storage unit of FIG. 1 placed inside a wood stove. [Diagram 5] FIG. 5 is a graph showing the results of a combustion test of a wood stove with and without a heat storage unit, illustrating the time progression of the temperature of the catalyst and the stove body of the wood stove. [Figure 6] FIG. 6 is a perspective view of a heat storage unit according to a modified example. [Figure 7] FIG. 7 is a perspective view of a heat storage unit according to another modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] Hereinafter, one embodiment of a heat storage unit for a wood stove (hereinafter, referred to as a heat storage unit 10) will be described with reference to Figs. 1 to 5. 1 to 4, the heat storage unit 10 is configured to be mountable on the bottom 52 of a combustion chamber 51 of a wood stove 50. The heat storage unit 10 of this embodiment includes a heat storage plate 11, two side wall portions 20, a mounting plate 15, a rear wall portion 30, and a front extension portion 40. The heat storage plate 11 corresponds to the heat storage portion in [Means for solving the problem].

[0032] In the following description, the front-rear direction and the up-down direction of the wood stove 50 will be simply referred to as the front-rear direction and the up-down direction, respectively. Also, the direction perpendicular to both the front-rear direction and the up-down direction will be referred to as the width direction.

[0033] <Heat storage plate 11> As shown in FIG. 4, the heat storage plate 11 is configured to be spaced apart from the inner wall 53 of the combustion chamber 51 and to cover the firewood 90 from above.

[0034] As shown in Fig. 1 to Fig. 4, the heat storage plate 11 is preferably inclined so that the front side is positioned higher. The heat storage plate 11 of this embodiment is a rectangular plate having long sides extending along the width direction. The heat storage plate 11 is preferably made of, for example, a steel material. The heat storage plate 11 may be made of cast steel or rolled steel.

[0035] <Side wall portion 20> 1 and 2, the two side wall portions 20 extend downward from both sides in the width direction of the heat storage plate 11. The side wall portions 20 in this embodiment extend downward from the entire edge portion in the width direction of the heat storage plate 11. That is, the upper end of the side wall portions 20 is inclined so as to be positioned higher toward the front side.

[0036] As shown in FIG. 3, the lower end of the side wall portion 20 extends along the front-rear direction. The side wall portion 20 is preferably made of, for example, a steel material. The two side wall portions 20 extend in the vertical direction and constitute a support portion 12 that supports the heat storage plate 11 from below.

[0037] <Placement plate 15> As shown in FIGS. 1 to 4, the placement plate 15 is for placing firewood 90 thereon, and is supported by two side walls 20 below the heat storage plate 11.

[0038] The mounting plate 15 has a mounting plate main body 16 located above the lower end of the side wall portion 20, and a communication portion 17 that communicates between the upper and lower parts of the mounting plate main body 16 and protrudes upward from the mounting plate main body 16.

[0039] The mounting plate body 16 of this embodiment is a rectangular plate having long sides extending in the width direction and short sides extending in the front-rear direction. The mounting plate body 16 is preferably made of, for example, a steel material.

[0040] The communication part 17 in this embodiment is cylindrical and is made of the same material as the mounting plate body 16. <Back wall part 30> 2 to 4, the rear wall 30 covers from the rear side an area surrounded by the heat storage plate 11, the two side wall portions 20, and the mounting plate 15. The rear wall 30 of this embodiment is a rectangular plate having long sides extending along the width direction and short sides extending along the up-down direction. The rear wall 30 is preferably made of a steel material.

[0041] <Front extension part 40> 1 to 4, the front extending portion 40 extends downward from the front edge of the heat storage plate 11. The front extending portion 40 of this embodiment extends downward from the entire front edge of the heat storage plate 11. The front extending portion 40 is in the shape of a rectangular plate having long sides extending along the width direction and short sides extending along the up-down direction.

[0042] An opening 18 is formed by the lower edge of the front extension portion 40, the front edges of the two side wall portions 20, and the front edge of the mounting plate body 16. That is, the heat storage unit 10 has an open front surface 13.

[0043] <Regulations Section 14> The front extension portion 40, the two side wall portions 20, and the rear wall portion 30 constitute a restricting portion 14 that extends downward from the periphery of the heat storage plate 11 and restricts the movement of gas along the lower surface of the heat storage plate 11. The restricting portion 14 in this embodiment is provided around the entire periphery of the heat storage plate 11.

[0044] The components of the heat storage unit 10 may be connected to each other by welding or fastening with bolts and nuts. Also, the components may be connected to each other by fitting projections and recesses together.

[0045] Next, the operation of this embodiment will be described. As shown in Fig. 4, when the heat storage unit 10 is placed on the bottom 52 of the combustion chamber 51 of the wood stove 50, the firewood 90 placed on the placement plate 15 is ignited to form a pilot flame. As a result, heat generated by the combustion of the firewood 90 (hereinafter, combustion heat) moves upward and is stored in the heat storage plate 11. In Fig. 4, the flow of primary air in the wood stove 50 is shown by a solid line, and the flow of secondary air is shown by a long dashed line.

[0046] The heat storage plate 11 is spaced apart from the inner wall 53 of the combustion chamber 51 of the wood stove 50. In addition, there is highly insulating air between the heat storage plate 11 and the inner wall 53 of the wood stove 50. This inhibits the transfer of heat from the heat storage plate 11 to the wood stove 50, so that the temperature of the heat storage plate 11 rises quickly.

[0047] When new firewood 90 is added onto the pilot fire while the temperature of the heat storage plate 11 has risen, the firewood 90 is heated. As shown by the white arrow in Figure 4, when the temperature of the firewood 90 is raised to about 250 degrees or more, the pyrolysis reaction of the firewood 90 progresses and combustible gas is generated from the firewood 90. As the combustible gas approaches the high-temperature heat storage plate 11, the temperature of the combustible gas increases and the combustible gas begins to burn.

[0048] Here, because the temperature around the combustible gas is high, the combustion of the combustible gas can be maintained even if the amount of air supplied to the combustion chamber 51 is reduced through the existing air amount adjustment means of the wood stove 50. In this embodiment, an air amount adjustment means (not shown) is provided in the middle of the passage that introduces secondary air into the wood stove 50. A blue flame, i.e., a high-temperature flame, is generated by burning the combustible gas under high temperature with the amount of air appropriately reduced. In addition, after the generation of combustible gas from the firewood 90 is stopped, the carbonized firewood 90, i.e., charcoal, begins to burn.

[0049] After the temperature of the heat storage plate 11 has risen sufficiently, the temperature of the wood stove 50 itself rises due to the heat received from the combustion gas and smoke, i.e., unburned gas, that are generated with the combustion of the combustible gas and firewood 90. As shown by the dashed-dotted arrow in Figure 4, the combustion gas and smoke are exhausted through the open front part 13 of the heat storage unit 10.

[0050] In this way, the temperature of the heat storage plate 11 can be raised quickly, and the combustible gas generated from the firewood 90 can be burned at a high temperature with an appropriately reduced amount of air. This improves the durability of the firewood 90 compared to a conventional wood stove 50 that mainly burns the firewood 90, i.e., when the heat storage unit 10 is not used.

[0051] Furthermore, by appropriately reducing the amount of air, it is possible to reduce the amount of smoke emitted from the chimney 54. This reduces the heat exhausted from the chimney 54 and increases the heat remaining in the room, allowing the temperature in the room in which the wood stove 50 is installed to rise quickly. In Figure 4, the flow of smoke inside the wood stove 50 is shown by a short dashed line.

[0052] In addition, since the front portion 13 of the heat storage unit 10 is open, the user can easily see the firewood 90 and combustible gas burning through the observation window 55 on the front of the wood stove 50.

[0053] In addition, the high heat generated by the combustion of combustible gas at high temperatures heats the catalyst 56, which can quickly increase the temperature of the catalyst 56 and activate the catalyst 56. This allows secondary combustion by the catalyst 56 to begin early.

[0054] Here, with reference to FIG. 5, the results of measuring the temperature of the catalyst 56 of the wood stove 50 and the temperature of the stove body after the firewood 90 was ignited will be described. The solid line in Fig. 5 shows the change over time in temperature of the catalyst 56 when the heat storage unit 10 is used. The two-dot chain line in Fig. 5 shows the change over time in temperature of the stove body when the heat storage unit 10 is used.

[0055] The dashed line in Fig. 5 indicates the change in temperature of the catalyst 56 over time when the heat storage unit 10 is not used. The dashed line in Fig. 5 indicates the change in temperature of the stove body over time when the heat storage unit 10 is not used.

[0056] In a wood stove 50 that does not use the heat storage unit 10, i.e., a conventional wood stove 50, the amount of air is large, so the maximum temperature of the wood stove 50 (stove body and catalyst 56) becomes high and the temperature change of the wood stove 50 becomes large. This may reduce the durability of the parts that make up the wood stove 50, especially the body of the wood stove 50 and the catalyst 56.

[0057] When the heat storage unit 10 of this embodiment is used, the maximum temperature and the amount of temperature change of the wood stove 50 (stove body and catalyst 56) are smaller than when the heat storage unit 10 is not used. This improves the durability of the parts that make up the wood stove 50, particularly the body of the wood stove 50 and the catalyst 56.

[0058] Next, the effects of this embodiment will be described. (1) The heat storage unit 10 is placed in the combustion chamber 51 of the wood stove 50, and includes a heat storage plate 11, a support portion 12, and a front portion 13. This configuration exerts the above-mentioned effects, and therefore can quickly raise the temperature of the room in which the wood stove 50 is installed, and can improve the durability of the firewood 90.

[0059] (2) The heat storage plate 11 is inclined so that the front side is positioned higher. In the wood stove 50, a portion of the primary air or secondary air introduced from outside is made to flow downward along the inner surface of the sight window 55 provided in the front of the wood stove 50, forming a so-called air curtain to prevent soot from adhering to the sight window 55. The secondary air burns the smoke generated during the primary combustion of the firewood 90 and combustible gases (secondary combustion).

[0060] According to the above configuration, the smoke generated by the combustion of the firewood 90 moves forward along the lower surface of the heat storage plate 11 and moves upward through the open front portion 13 of the heat storage unit 10, so that it is likely to react with a part of the secondary air flowing downward along the inner surface of the observation window 55. Therefore, the secondary combustion can be favorably promoted.

[0061] (3) The heat storage unit 10 includes the restriction portion 14 . According to this configuration, the movement of gas such as smoke along the lower surface of the heat storage plate 11 is restricted by the restricting portion 14 provided on the periphery of the heat storage plate 11, so that the combustion heat of the firewood 90 tends to remain directly below the heat storage plate 11. This allows the temperature of the heat storage plate 11 to rise more quickly.

[0062] (4) The support portion 12 extends in the vertical direction and is placed on the bottom portion 52 of the combustion chamber 51 to support the heat storage plate 11 from below.

[0063] With this configuration, by placing the support part 12 on the bottom 52 of the combustion chamber 51 of the wood stove 50, the heat storage unit 10 can be easily placed in the combustion chamber 51. In addition, since the heat storage unit 10 can be easily removed from inside the combustion chamber 51, maintenance of the wood stove 50 and the heat storage unit 10 can be easily performed.

[0064] (5) The heat storage unit 10 includes a mounting plate 15. The mounting plate 15 includes a mounting plate main body 16 and a communication portion 17. According to the above configuration, a part of the secondary air forming the air curtain flows into the space formed between the mounting plate 15 and the bottom 52 of the wood stove 50, and is supplied to the firewood 90 through the communication part 17 that connects the upper and lower parts of the mounting plate body 16. Since the communication part 17 protrudes upward from the mounting plate body 16, the communication part 17 is prevented from being blocked by ash generated by the combustion of the firewood 90 or charcoal. In addition, since the primary air or secondary air is heated when passing through the communication part 17, high-temperature air can be supplied to the firewood 90. Therefore, the combustion of the firewood 90 or charcoal can be sustained in an optimal manner.

[0065] (6) The support portion 12 has two side wall portions 20. The heat storage unit 10 has a rear wall portion 30. The restricting portion 14 includes a front extending portion 40, the two side wall portions 20, and the rear wall portion 30, and is provided around the entire periphery of the heat storage plate 11.

[0066] According to this configuration, the heat storage unit 10 is box-shaped with an opening 18 at the front. This makes it difficult for the combustion heat of the firewood 90 to escape, so the temperature of the heat storage plate 11 and the firewood 90 located directly below it can be raised quickly.

[0067] <Modification> This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

[0068] If the wood stove 50 has a side door, a hole can be provided in one of the side walls 20 of the heat storage unit 10. This allows firewood 90 to be thrown into the heat storage unit 10 through the side opening of the wood stove 50 opened by the side door and the hole.

[0069] 6, for example, holes 21, 31 that communicate between the inside and outside of the heat storage unit 10 may be provided in the two side walls 20 and the rear wall 30. Even in this case, the restricting portion 14 is formed by the front extending portion 40, the portions of the two side walls 20 above the holes 21, and the portion of the rear wall 30 above the hole 31. Therefore, effects similar to the above effects (2) and (5) can be achieved.

[0070] The mounting plate body 16 may be formed of a perforated plate such as a grating. In this case, the communication portion 17 may be omitted. The placement plate 15 may be provided at the same position as the lower end of the side wall portion 20, i.e., the lower end of the support portion 12, in the vertical direction.

[0071] The placement plate 15 can also be omitted. In this case, the firewood 90 can be placed directly on the bottom 52 of the combustion chamber 51 of the wood stove 50. The vertical position of the heat storage plate 11 may be constant in the front-rear direction.

[0072] A large number of protrusions may be provided on the lower surface of the heat storage plate 11. This increases the surface area of ​​the heat storage plate 11, thereby making it possible to effectively improve the heat storage performance of the heat storage plate 11. The restricting portion 14 does not have to be provided along the entire periphery of the heat storage plate 11. For example, in the above embodiment and the modified example shown in Fig. 6, the rear wall portion 30 may be omitted.

[0073] The restricting portion 14 may be omitted. For example, as shown in FIG. 7, the support portion 12 may be U-shaped in plan view, consisting of a pair of side walls 20 and a rear wall 30, and the heat storage plate 11 may be placed on the upper edge of the support portion 12. In this case, the upper end of the side wall portion 20 is inclined so that the front side is positioned higher, as in the above embodiment. The front end of the heat storage plate 11 is connected to a front extension portion 40 that is bent and extends downward. The front extension portion 40 is engaged with the front edge of the side wall portion 20, thereby positioning the heat storage plate 11 in the front-rear direction. Even in this case, an effect similar to the effect (1) above can be achieved.

[0074] The support portion 12 may be formed of a plurality of columnar members. In this case, it is preferable to provide the support portion 12 at each corner of the heat storage plate 11, for example. The support portion 12 is not limited to one that extends in the vertical direction and is placed on the bottom portion 52 of the combustion chamber 51 to support the heat storage plate 11 from below. For example, it may be one that extends from the inner wall 53 of the combustion chamber 51 and supports the heat storage plate 11.

[0075] The heat storage plate 11 is not limited to a rectangular plate shape, but may be changed as appropriate to a square plate shape, a triangular plate shape, or the like. The heat storage plate 11 is not limited to being made of steel material, but may be made of other materials such as lava plate, vermiculite plate, heat-resistant brick, etc.

[0076] The heat storage portion according to the present invention is not limited to the plate-shaped heat storage plate 11 shown in the above embodiment and its modified examples. The heat storage unit may be equipped with a heater wire that is heated by passing electricity through it, or may be equipped with a combustor that burns combustible gas, such as propane gas, supplied from outside the wood stove 50. In this case, the temperature of the heat storage unit can be increased more quickly by external energy, such as electric power or combustible gas, supplied from the outside.

[0077] The wood stove to which the heat storage unit according to the present invention is applied is not limited to the one exemplified in the above embodiment. For example, the present invention can be applied to a wood stove that does not have a catalyst 56. [Explanation of symbols]

[0078] 10…Heat storage unit 11...Heat storage plate 12...Support part 13...Front part 14. Regulatory Department 15…Placement plate 16...Placement plate body 17…Communication part 18…Opening 20…Side wall 21...hole 30...Rear wall part 31...hole 40...Front extension part 50…Wood stove 51…Combustion chamber 52...bottom 53…Inner wall 54…Chimney 55...Sightseeing window 56...Catalyst 90…Firewood

Claims

1. A heat storage unit disposed in a combustion chamber of a wood stove, When the front-to-back direction of the wood stove is simply defined as the front-to-back direction, A heat storage unit configured to cover the firewood from above; A support portion that supports the heat storage portion in a state spaced apart from an inner wall of the combustion chamber; and an open front portion. Heat storage unit for wood stoves.

2. The lower surface of the heat storage unit is inclined so that the front side is positioned higher. A heat storage unit for a wood stove according to claim 1.

3. A restricting portion is provided which extends downward from the periphery of the heat storage portion and restricts the movement of gas along the lower surface of the heat storage portion. A heat storage unit for a wood stove according to claim 1 or 2.

4. The support portion extends in the vertical direction and is placed on a bottom portion of the combustion chamber to support the heat storage portion from below. A heat storage unit for a wood stove according to claim 3.

5. A loading plate is provided below the heat storage section and supported by the support section, and on which firewood is placed, The mounting plate is A mounting plate body located above a lower end of the support portion; a communication portion that communicates the upper and lower portions of the mounting plate body and protrudes upward from the mounting plate body, A heat storage unit for a wood stove according to claim 4.

6. When the direction perpendicular to both the front-back direction and the up-down direction is the width direction, The support portion has two side wall portions extending downward from both sides of the heat storage portion in the width direction, a rear wall portion that covers a portion surrounded by the heat storage portion, the two side wall portions, and the mounting plate from a rear side, The regulating portion is A front extension portion extending downward from a front edge of the heat storage portion; The two side walls; The rear wall portion is provided around the entire periphery of the heat storage portion. A heat storage unit for a wood stove according to claim 5.

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