A fully combustible stove

Abstract

The present invention discloses a fully combustion-assisted furnace, which includes a combustion structure, a support structure, a wind guiding structure capable of adjusting the air volume, an ash pan, a grate located directly above the ash pan, as well as a first diversion path group for allowing external air to enter the combustion chamber for combustion assistance, a second diversion path group with an air outlet located above the air outlet of the first diversion path group, and a third diversion path group with an air outlet located above the air outlet of the second diversion path group. The first ventilation holes are arranged on the first diversion path group, and the first air outlet holes form the air outlets of the first diversion path group. The air outlets of the second diversion path group are arranged around the middle of the combustion chamber, and the air outlets of the third diversion path group are arranged around the upper part of the combustion chamber. This furnace can achieve secondary combustion assistance and tertiary combustion assistance, enabling the fuel to burn more fully and thoroughly, thereby improving the combustion firepower and combustion efficiency of the fuel and greatly reducing the emission of harmful flue gas.

Description

Technical Field

[0001] The present invention relates to the field of stoves, and in particular to a stove with complete combustion assistance. Background Art

[0002] A stove is mainly a fire-making appliance that uses materials such as firewood and charcoal as fuel. For existing stoves, such as a patent for invention with the publication number CN118258040A, it includes a stove body, an inner container connected inside the stove body, and an ash pan arranged at intervals below the inner container. A combustion chamber is formed inside the inner container, and ash leakage holes are opened at the bottom of the inner container. An air inlet for external air to enter the stove body is opened at the lower end of the side wall of the stove body. During use, the negative pressure generated after the fuel burns in the combustion chamber can be utilized to allow external air to enter the combustion chamber to mix with the fuel successively from the air inlet, the gap between the ash pan and the inner container, and the ash leakage holes. However, in this technical solution, the external air can only enter the combustion chamber through the ash leakage holes at the bottom of the inner container to assist the fuel combustion, and the fuel can only burn once. During the primary combustion process, due to reasons such as insufficient oxygen supply or incomplete fuel combustion, the combustion efficiency of the fuel is very low, and a large amount of combustible substances such as fuel debris and carbon monoxide will be directly discharged with the flue gas, causing environmental pollution and affecting people's physical health. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a stove with complete combustion assistance, which can achieve secondary and tertiary combustion assistance, enabling the fuel to burn more fully and thoroughly, thereby improving the combustion firepower and combustion efficiency of the fuel and greatly reducing the emission of harmful flue gas.

[0004] The technical solution adopted by the present invention is as follows: A fully combustible stove includes a combustion structure, a support structure, a wind guiding structure capable of adjusting the air volume, an ash pan, and a grate located directly above the ash pan. The combustion structure has an inner cavity structure, an outer cavity structure, and a combustion chamber, and the combustion chamber is defined inward from the inner cavity structure; The support structure is detachably connected to the lower part of the combustion structure. The support structure includes support feet for placing on a support interface, and a notch is provided along the wall of the support structure between adjacent support feet, and an air inlet channel is formed by the notch; The wind guiding structure is arranged directly below the combustion chamber and connected to the support structure. The wind guiding structure is provided with a plurality of wind guiding channels along the circumferential direction; The ash pan is connected to the upper part of the wind guiding structure through a first connection structure. A plurality of ventilation holes I are provided along the side wall of the ash pan; The grate can be movably placed on the ash pan, and a plurality of air outlet holes I are provided on the grate; And a first diversion path group for allowing external air to enter the combustion chamber for combustion support, a second diversion path group with an air outlet located above the air outlet of the first diversion path group, and a third diversion path group with an air outlet located above the air outlet of the second diversion path group. The ventilation holes I are arranged on the first diversion path group, the air outlet holes I form the air outlet of the first diversion path group, the air outlets of the second diversion path group are arranged around the middle of the combustion chamber, and the air outlets of the third diversion path group are arranged around the upper part of the combustion chamber.

[0005] Preferably, the first diversion path group includes a first section of path that enters from the air inlet channel of the notch and penetrates through the wind guiding structure via the wind guiding channel, and a second section of path that extends upward from the top of the wind guiding structure and forms in the area surrounded by the inner wall of the outer cavity structure and the outer wall of the ash pan. The width of the second section of path gradually decreases in the upward direction for diversion.

[0006] Preferably, the first diversion path group further includes a third section of path that is arranged upward from the ventilation hole I of the ash pan and penetrates through the grate via the air outlet hole I. The ventilation hole I is arranged at the upper end close to the side wall of the ash pan, and the air outlet hole I forms the air outlet of the first diversion path group.

[0007] Preferably, the ash pan includes a pan bottom plate, a pan side plate extending upward from the periphery of the pan bottom plate, and a pan edge structure formed by turning the top of the pan side plate outward. The pan edge structure is sleeved inside the inner cavity structure, the grate can be movably placed on the pan edge structure, and the ventilation hole I is arranged on the pan side plate at a position close to the pan edge structure.

[0008] Preferably, the air guiding structure has an intermediate region disposed directly below the bottom plate of the tray and a peripheral region disposed around the intermediate region. A part of the air guiding channels is arranged in the intermediate region of the air guiding structure, and another part of the air guiding channels is arranged in the peripheral region of the air guiding structure. The bottom plate of the tray is spaced above the air guiding structure. The first connecting structure includes a plurality of supporting feet arranged circumferentially between the bottom plate of the tray and the air guiding structure, and an interval region communicating with the air guiding channels in the intermediate region is formed between adjacent supporting feet.

[0009] Preferably, the inner cavity structure includes a lower inner cavity part, a middle inner cavity part, an upper inner cavity part, a lower supporting table surface formed by flanging the bottom of the lower inner cavity part outward, and an upper supporting table surface formed by flanging the top of the upper inner cavity part outward. The lower supporting table surface is spaced above the air guiding structure, and the outer end of the lower supporting table surface is combined with the inner wall of the outer cavity structure. A plurality of ventilation holes II are provided through the lower supporting table surface. The outer end of the upper supporting table surface is combined with the outer cavity structure. The circumferential dimension of the upper inner cavity part is larger than that of the lower inner cavity part. The lower end of the middle inner cavity part is combined with the lower inner cavity part, and the upper end is combined with the upper inner cavity part to form a wedge-shaped structure with a smaller lower part and a larger upper part. A plurality of air outlet holes II are provided through the middle inner cavity part, and the air outlet holes II form the air outlets of the second flow path group. A plurality of air outlet holes III are provided through the upper inner cavity part, and the air outlet holes III form the air outlets of the third flow path group.

[0010] Preferably, the second flow path group includes a first path that enters from the air inlet channel of the notch and penetrates through the air guiding structure via the ventilation hole I, a second path that extends upward from the top of the air guiding structure and is formed in the region surrounded by the inner wall of the outer cavity structure and the outer wall of the ash pan, a fourth path that extends upward from the ventilation hole II of the lower supporting table surface and is formed in the region surrounded by the inner wall of the outer cavity structure and the outer wall of the lower inner cavity part, and a fifth path that extends upward and is formed in the region surrounded by the inner wall of the outer cavity structure and the outer wall of the middle inner cavity part. Part of the air flowing along the fifth path can enter the combustion chamber through the air outlet holes II. The width of the second path is gradually reduced in the upward direction for guiding the flow, the width of the fourth path is smaller than that of the second path, and the width of the fifth path is gradually reduced in the upward direction for guiding the flow.

[0011] Preferably, the middle inner cavity part is arranged as a conical ring plate structure, and the outer diameter of the middle inner cavity part gradually increases in the upward direction, and the inner diameter of the middle inner cavity part also gradually increases in the upward direction. The air outlet holes II are arranged in an inclined upward direction.

[0012] Preferably, the third air diversion path group includes a first path formed by entering from the air inlet channel of the notch and passing through the air vent hole 1 to penetrate the air guiding structure, a second path formed by extending upward from the top of the air guiding structure and along the region enclosed between the inner wall of the outer cavity structure and the outer wall of the ash pan, a fourth path formed by extending upward from the air vent hole 2 of the lower support table surface and along the region enclosed between the inner wall of the outer cavity structure and the outer wall of the lower inner cavity part, a fifth path arranged upward and along the region enclosed between the inner wall of the outer cavity structure and the outer wall of the middle inner cavity part, and a sixth path arranged upward and along the region enclosed between the inner wall of the outer cavity structure and the outer wall of the upper inner cavity part. Part of the air flowing along the fifth path can enter the combustion chamber through the air outlet hole 2, and part of the air flowing along the sixth path can enter the combustion chamber through the air outlet hole 3. The width of the second path is gradually reduced in the upward direction for air diversion, the width of the fourth path is smaller than that of the second path, and the width of the fifth path is gradually reduced in the upward direction for air diversion.

[0013] Preferably, the air guiding structure is arranged above the air inlet channel. The air guiding structure includes a support plate and an adjusting plate coaxially arranged on the lower side of the support plate. The outer peripheral side of the support plate is combined with the inner side of the support structure wall. After combination, an installation area for movably placing the combustion structure is formed between the outer peripheral edge of the top of the support plate and the inner side of the support structure wall. The ash pan is connected to the support plate through a first connection structure; the adjusting plate is rotatably connected to the support plate through a rotating shaft arranged along the axis of the support plate. The air guiding channel includes an air inlet hole penetrating through the support plate and an adjusting hole corresponding to the air inlet hole and penetrating through the adjusting plate. The adjusting plate can rotate relative to the support plate between a fully open position and a closed position. In the fully open position, the adjusting hole and the air inlet hole are arranged opposite to each other and communicate with each other; in the closed position, the adjusting hole and the air inlet hole are arranged out of alignment with each other, and the adjusting hole is blocked by the support plate, and the air inlet hole is blocked by the adjusting plate.

[0014] The beneficial effects achieved by the present invention are as follows: In the furnace of the present invention, a first air guiding path group for allowing external air to enter the combustion chamber for combustion support, a second air guiding path group with an air outlet above the air outlet of the first air guiding path group, and a third air guiding path group with an air outlet above the air outlet of the second air guiding path group are provided. This enables the fuel to be mixed with the air introduced into the combustion chamber by the first air guiding path group for primary combustion. At the same time, a large amount of combustibles such as fuel debris and carbon monoxide generated during the primary combustion process rise under the push of the combustion airflow and are mixed with the air introduced into the combustion chamber by the second air guiding path group for secondary combustion. Additionally, a small amount of combustibles such as fuel debris and carbon monoxide remaining during the secondary combustion process continue to rise under the push of the combustion airflow and are mixed with the air introduced into the combustion chamber by the third air guiding path group for tertiary combustion. Thus, secondary and tertiary combustion support are realized, enabling the fuel to burn more fully and thoroughly, thereby improving the combustion firepower and combustion efficiency of the fuel and greatly reducing the emission of harmful flue gas. Moreover, ventilation hole 1 is arranged on the first air guiding path group, air outlet hole 1 forms the air outlet of the first air guiding path group, and the grate is located directly above the ash pan. That is to say, the first air guiding path group guides air into the combustion chamber through ventilation hole 1 on the side wall of the ash pan and air outlet hole 1 on the grate for combustion support. Compared with the structure in the prior art where air enters the combustion chamber through the horizontal gap between the ash receiving tray and the inner liner and the ash leakage hole, the air in this part of the guiding process in the present invention always flows upward, with less resistance to air flow, which is more conducive to guiding sufficient air into the combustion chamber for combustion support. And the air outlet of the first air guiding path group is arranged on the grate, and the grate is located directly above the ash pan and can be removably placed on the ash pan, so that the grate can be taken out separately to clean the air outlet of the first air guiding path group, which is convenient for cleaning. The air outlet of the second air guiding path group is arranged around the middle of the combustion chamber, and the air outlet of the third air guiding path group is arranged around the upper part of the combustion chamber, enabling the air inhaled into the combustion chamber through the air outlet of the second air guiding path group and the air outlet of the third air guiding path group to produce a swirling effect, thereby improving the mixing effect of air with fuel, fuel debris, and combustibles such as carbon monoxide, and enabling the fuel to burn more fully. The air guiding structure is arranged directly below the combustion chamber. The air guiding structure is provided with a plurality of air guiding channels in the circumferential direction. External air can enter the combustion structure through the air inlet channel formed by the gap between adjacent support feet and the air guiding channels on the air guiding structure directly below the combustion chamber. Compared with directly setting the air inlet on the side wall of the furnace body in the prior art, the present invention is less affected by external environmental factors such as wind direction, making the air inhaled into the combustion structure more sufficient and uniform, with better combustion support effect. The air guiding structure can adjust the air volume and can meet the requirements of different firepower levels, with a wider application range.The support structure is detachably connected to the lower part of the combustion structure, and the air guiding structure is connected to the support structure. The ash pan is connected to the upper part of the air guiding structure through the first connection structure, so that the ash pan, the air guiding structure and the support structure can be detached as a whole relative to the combustion structure, facilitating the dumping of the ash in the ash pan and making it very convenient to use.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 is a schematic structural view of a stove according to an embodiment of the present invention Figure 1 。

[0018] Figure 2 is a schematic structural view of a stove according to an embodiment of the present invention Figure 2 。

[0019] Figure 3 is a schematic cross-sectional structural view of a stove according to an embodiment of the present invention.

[0020] Figure 4 is a schematic view of a partial structure of a stove according to an embodiment of the present invention Figure 1 。

[0021] Figure 5 is a schematic view of a partial structure of a stove according to an embodiment of the present invention Figure 2 。

[0022] Figure 6 is an exploded structural view of a stove according to an embodiment of the present invention.

[0023] Figure 7 is an exploded partial structural view of a stove according to an embodiment of the present invention.

[0024] Figure 8 is a structural view of a combustion structure according to an embodiment of the present invention.

[0025] Figure 9 is a structural view of a support structure, an air guiding structure, and an ash pan according to an embodiment of the present invention.

[0026] Reference numerals: combustion structure 1; inner cavity structure 11; lower inner cavity part 111; middle inner cavity part 112; second air outlet hole 1121; upper inner cavity part 113; third air outlet hole 1131; lower support table surface 114; second ventilation hole 1141; upper support table surface 115; second support edge 1151; second limiting edge 1152; outer cavity structure 12; support ring 121; support structure 2; air inlet channel 20; support feet 21; guiding channel 22; air guiding structure 3; air guiding channel 30; support plate 31; air inlet hole 311; first connection hole 312; adjusting plate 32; adjusting hole 321; second connection hole 322; operating part 323; ash pan 4; fitting gap 40; pan bottom plate 41; horizontal guiding surface 411; inclined guiding surface 412; pan side plate 42; first ventilation hole 421; pan edge structure 43; first support edge 431; first limiting edge 432; return edge 433; return guiding part 4331; grate 5; first air outlet hole 51; ash leakage hole 52; first connection structure 6; supporting feet 61; flame concentrating ring 7; rotating shaft 8; first flow path group 100; second flow path group 200; third flow path group 300; first section path a; second section path b; third section path c; fourth section path d; fifth section path e; sixth section path f. Detailed implementation manners

[0027] For the purposes of making the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0031] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present invention pertains. The terms "first", "second" and similar terms used in the specification and claims of the present patent application do not denote any order, quantity or importance, but are merely used to distinguish different components. Similarly, the terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one.

[0032] As Figures 1 - 9As shown, as an embodiment of the present invention, a fully combustible stove is provided, which includes a combustion structure 1, a support structure 2, a wind guiding structure 3 capable of adjusting the air volume, an ash pan 4, and a grate 5 located directly above the ash pan. The combustion structure 1 has an inner cavity structure 11, an outer cavity structure 12, and a combustion chamber, and the combustion chamber is defined inwardly by the inner cavity structure 11 for burning fuels such as firewood and charcoal. The support structure 2 is detachably connected to the lower part of the combustion structure 1. The support structure 2 includes support feet 21 for placing on a support interface such as the ground or the floor surface. There are gaps between adjacent support feet 21 along the wall of the support structure 2, and an air inlet channel 20 is formed by the gaps for allowing external air to flow into directly below the wind guiding structure 3. The wind guiding structure 3 is arranged directly below the combustion chamber and is connected to the support structure 2. The wind guiding structure 3 is provided with a plurality of wind guiding channels 30 in the circumferential direction for guiding the air directly below the wind guiding structure 3 into the combustion structure 1. The ash pan 4 is connected to the upper part of the wind guiding structure 3 through a first connection structure 6. The ash pan 4 is provided with a plurality of ventilation holes 421 along its side wall. The grate 5 is movably placed on the ash pan 4 for supporting the fuel. The grate 5 is provided with a plurality of air outlet holes 51 for introducing air into the combustion chamber, and the grate 5 is also provided with ash leakage holes 52 for guiding the ashes after fuel combustion into the ash pan 4. The air outlet holes 51 and the ash leakage holes 52 can be set as the same hole or can be set as different holes respectively. It also includes a first diversion path group 100 for allowing external air to enter the combustion chamber for secondary combustion, a second diversion path group 200 with an air outlet located above the air outlet of the first diversion path group 100, and a third diversion path group 300 with an air outlet located above the air outlet of the second diversion path group 200, such that the fuel is mixed with the air introduced into the combustion chamber by the first diversion path group 100 for primary combustion. At the same time, a large amount of combustibles such as fuel debris and carbon monoxide generated during the primary combustion process rise under the push of the combustion airflow and are mixed with the air introduced into the combustion chamber by the second diversion path group 200 for secondary combustion. At the same time, a small amount of combustibles such as fuel debris and carbon monoxide remaining during the secondary combustion process continue to rise under the push of the combustion airflow and are mixed with the air introduced into the combustion chamber by the third diversion path group 300 for tertiary combustion, thereby realizing secondary and tertiary combustion assistance, enabling the fuel to burn more fully and thoroughly, thus being able to improve the combustion firepower and combustion efficiency of the fuel and greatly reducing the emission of harmful flue gas;In addition, the first ventilation hole 421 is arranged on the first air diversion path group 100, and the first air outlet hole 51 forms the air outlet of the first air diversion path group 100. The grate 5 is located directly above the ash pan 4. That is to say, the first air diversion path group 100 guides air into the combustion chamber through the first ventilation hole 421 on the side wall of the ash pan 4 and the first air outlet hole 51 on the grate 5 for combustion assistance. Compared with the structure in the prior art where air is introduced into the combustion chamber through the horizontal gap between the ash receiving tray and the inner liner and the ash leakage holes, the air in this part of the diversion process of the present invention always flows upward, with less air flow resistance, which is more conducive to guiding sufficient air into the combustion chamber for combustion assistance. Moreover, the grate 5 can be movably placed on the ash pan 4, so that the grate 5 can be taken out separately to clean the air outlet of the first air diversion path group 100, which is convenient for cleaning. The air outlets of the second air diversion path group 200 are arranged around the middle of the combustion chamber, and the air outlets of the third air diversion path group 300 are arranged around the upper part of the combustion chamber, so that the air inhaled into the combustion chamber through the air outlets of the second air diversion path group 200 and the air outlets of the third air diversion path group 300 can produce a swirling effect, thereby improving the mixing effect of air with combustibles such as fuel, fuel debris, and carbon monoxide, and enabling the fuel to burn more fully. The air guiding structure 3 is arranged directly below the combustion chamber. The air guiding structure 3 is provided with a plurality of air guiding channels 30 in the circumferential direction. External air can enter the combustion structure through the air inlet channel 20 formed by the gaps between adjacent support feet 21 and the air guiding channels 30 on the air guiding structure 3 directly below the combustion chamber. Compared with the prior art where the air inlet is directly arranged on the side wall of the furnace body, the present invention is less affected by external environmental factors such as wind direction, making the air inhaled into the combustion structure more sufficient and uniform, and having a better combustion assistance effect. The air guiding structure 3 can adjust the air volume and can meet the requirements of different fire powers, with a wider application range. The support structure 2 is detachably connected to the lower part of the combustion structure, and the air guiding structure 3 is connected to the support structure 2, while the ash pan 4 is connected to the upper part of the air guiding structure 3 through the first connection structure 6, so that the ash pan 4, the air guiding structure 3, and the support structure 2 can be detached as a whole relative to the combustion structure 1, which is convenient for dumping the ash in the ash pan 4 and is very convenient to use.

[0033] Such as Figure 3As shown, in some specific embodiments, the first air guiding path group 100 includes a first path a formed by the air inlet passage 20 entering from the notch and passing through the air guiding passage 30 to penetrate the air guiding structure 3, and a second path b formed by going upward from the top of the air guiding structure 3 and along the region enclosed between the inner wall of the outer cavity structure 12 and the outer wall of the ash pan 4. The first path a is used to guide external air to enter directly below the air guiding structure 3 from the air inlet passage 20 and enter the combustion structure 1 through the air guiding passage 30. The second path b is used to guide the air entering the combustion structure 1 to flow upward along the inner wall of the outer cavity structure 12 and the outer wall of the ash pan 4. The width of the second path b gradually decreases in the upward direction for air guiding, so that the wind force gradually increases from bottom to top, thereby enabling a relatively large pressure difference to be formed with the combustion chamber, which is conducive to guiding air to be injected into the combustion chamber and has a better combustion assisting effect.

[0034] As Figure 3 shown, in some specific embodiments, the first air guiding path group 100 further includes a third path c arranged upward from the ventilation hole 421 of the ash pan 4 and passing through the air outlet hole 51 to penetrate the grate 5. The air outlet hole 51 forms the air outlet of the first air guiding path group 100. The third path c is used to guide air to enter the ash pan 4 through the ventilation hole 421 and enter the combustion chamber through the air outlet hole 51. The ventilation hole 421 is arranged at the upper end close to the side wall of the ash pan 4. On the one hand, the ventilation hole 421 introduces air into the ash pan 4 at a position with a relatively large wind force to ensure a good combustion assisting effect. On the other hand, the distance between the ventilation hole 421 and the bottom of the ash pan 4 is relatively large, and the distance between the ventilation hole 421 and the air outlet hole 51 is relatively small, so that while avoiding blowing up the ash in the ash pan 4, the air can quickly enter the combustion chamber through the air outlet hole 51 after passing through the ventilation hole 421 to assist combustion.

[0035] As Figure 3 、 Figure 6As shown, in some specific embodiments, the ash pan 4 includes a pan bottom plate 41, a pan side plate 42 extending upward from the periphery of the pan bottom plate 41, and a pan edge structure 43 formed by flanging outward from the top of the pan side plate 42. The pan edge structure 43 is sleeved in the inner cavity structure 11. The grate 5 can be movably placed on the pan edge structure 43, so as to ensure that the fuel placed on the grate 5 burns in the combustion chamber. The heat insulation cavity between the inner cavity structure 11 and the outer cavity structure 12 can play a heat insulation role, avoiding scalding the operator when touching the outer cavity structure 12. The pan edge structure 43 does not contact the inner cavity structure 11, and the outer diameter of the pan edge structure 43 is smaller than the inner diameter of the inner cavity structure 11, so as to form a fitting gap 40 between the pan edge structure 43 and the inner cavity structure 11. The width of the fitting gap 40 is set to 0.5 - 2 mm, which is used to prevent the combustion structure 1 or the ash pan 4 from causing the ash pan 4 to not be sleeved in the inner cavity structure 11 due to thermal expansion and contraction. Among them, the width of the fitting gap 40 is preferably 1.5 mm, which can prevent the ash pan 4 from not being sleeved in the inner cavity structure 11 due to thermal expansion and contraction, and at the same time avoid a large amount of air directly entering the combustion chamber through the fitting gap 40, thus affecting the air guiding effect of the first air guiding path group 100, the second air guiding path group 200 or the third air guiding path group 300.

[0036] As Figure 3 , Figure 9As shown, in some specific embodiments, the air guiding structure 3 has a middle region disposed directly below the disk bottom plate 41 and a peripheral region disposed around the middle region. A part of the air guiding channels 30 are provided in the middle region of the air guiding structure 3. The disk bottom plate 41 is spaced above the air guiding structure 3. The first connecting structure 6 includes a plurality of supporting feet 61 arranged circumferentially between the disk bottom plate 41 and the air guiding structure 3. An interval region communicating with the air guiding channels 30 in the middle region is formed between adjacent supporting feet 61. The air guiding channels 30 in the middle region can introduce the air directly below the middle region of the air guiding structure 3 into the combustion structure 1, and laterally diffuse from the middle to the periphery along the upper side surface of the air guiding structure 3 and the outer wall of the disk bottom plate 41, and flow upward along the inner wall of the outer cavity structure 12, the inner wall of the inner cavity structure 11, and the outer wall of the disk side plate 42 to the first ventilation hole 421 or the second ventilation hole 1141, or flow back to the first ventilation hole 421 along the outer wall of the disk edge structure 43 and the inner wall of the inner cavity structure 11. Another part of the air guiding channels 30 are provided in the peripheral region of the air guiding structure 3. The air guiding channels 30 in the peripheral region can introduce the air directly below the peripheral region of the air guiding structure 3 into the combustion structure 1, and flow upward along the inner wall of the outer cavity structure 12, the inner wall of the inner cavity structure 11, and the outer wall of the disk side plate 42 to the first ventilation hole 421 or the second ventilation hole 1141, or flow back to the first ventilation hole 421 along the outer wall of the disk edge structure 43 and the inner wall of the inner cavity structure 11. In addition, when the cold air entering from the outside flows along the air guiding structure 3, the disk bottom plate 41, the disk side plate 42, the disk edge structure 43, the inner cavity structure 11, and the outer cavity structure 12, it can also exchange heat with these, so that the cold air can be gradually converted into hot air that is more conducive to combustion support, and can also dissipate heat from these structures to avoid scalding the operator.

[0037] As Figure 3As shown, in some specific embodiments, the first ventilation hole 421 is disposed at a position on the disc side plate 42 close to the disc edge structure 43. The outer end surface of the disc bottom plate 41 includes a horizontal guiding surface 411 arranged in the horizontal direction and an inclined guiding surface 412 arranged around the outer periphery of the horizontal guiding surface 411. The horizontal guiding surface 411 can guide air to enter the combustion structure 1 through the intermediate area air guiding channel 30 and then diffuse outward in the horizontal direction. The inclined guiding surface 412 is arranged as a conical structure, and the radius of the upper end of the inclined guiding surface 412 is greater than that of the lower end, which can guide the air flowing outward in the horizontal direction to flow obliquely upward. At the same time, compared with the area of the circular area formed around between the horizontal guiding surface 411 and the inner wall of the outer cavity structure 12, since the area of the annular area formed around between the inclined guiding surface 412 and the inner wall of the outer cavity structure 12 is reduced, the pressure of the air during the upward flow from bottom to top gradually increases. The disc side plate 42 is arranged as a conical structure, and the radius of the upper end of the disc side plate 42 is greater than that of the lower end, so as to guide the pressure of the air during the upward flow from bottom to top to continue to increase gradually. The disc edge structure 43 includes a first support edge 431 formed by turning the edge of the disc side plate 42 upward and outward, a first limiting edge 432 formed by turning the outer end of the first support edge 431 upward, and a return edge 433 formed by turning the first limiting edge 432 outward. Among them, the grate 5 is placed on the upper side of the first support edge 431 and is limited from radially moving relative to the ash pan 4 by the first limiting edge 432. The operator can directly lift the grate 5 out of the ash pan 4 and then pour the ash in the ash pan 4. The return edge 433 has a downward extending return guiding portion 4331. An air return area is formed around between the disc edge structure 43, the inner cavity structure 11 and the disc side plate 42. Part of the air can rise along the outer wall of the disc side plate 42, press against the first support edge 431, flow laterally outward along the first support edge 431, then flow upward along the first limiting edge 432 and the inner cavity structure 11, and then flow downward along the return edge 433 and its return guiding portion 4331 to the air return area, so as to guide the rising air to return to the first ventilation hole 421.

[0038] In some specific embodiments, the inner cavity structure 11 includes a lower inner cavity portion 111, a middle inner cavity portion 112, an upper inner cavity portion 113, a lower support table surface 114 formed by flanging the bottom of the lower inner cavity portion 111 outward, and an upper support table surface 115 formed by flanging the top of the upper inner cavity portion 113 outward. The lower support table surface 114 is arranged at intervals above the air guiding structure 3, and the outer end of the lower support table surface 114 is combined with the inner wall of the outer cavity structure 12. The outer end of the upper support table surface 115 is combined with the outer cavity structure 12, so as to form a heat insulation cavity around between the inner cavity structure 11 and the outer cavity structure 12, avoiding the heat of the combustion chamber being transferred to the outer cavity structure 12 and scalding the operator. This combination method can be welding or integral molding. A plurality of second ventilation holes 1141 are provided through the lower support table surface 114 for air to enter the heat insulation cavity. By arranging the lower support table surface 114 at intervals above the air guiding structure 3, the second path b is formed by surrounding the bottom surface of the lower support table surface 114, the inner wall of a part of the outer cavity structure 12 below the lower support table surface 114, the inner wall of a part of the lower inner cavity portion 111 below the reflux guiding portion 4331, the outer wall of the ash pan 4, and the top surface of the air guiding structure 3. The movement range of the entire second path b is relatively large, and the air guiding structure 3 is arranged directly below the combustion chamber. By opening air guiding channels 30 in various parts of the air guiding structure 3, more air can be guided to enter the combustion structure 1 from the air guiding structure 3.

[0039] Such as Figure 1 , Figure 3As shown, in some specific embodiments, the combustion structure 1 is arranged as a cylindrical structure, which is conducive to the air inhaled into the combustion chamber through the air outlet of the second flow path group 200 and the air outlet of the third flow path group 300 to produce a swirling effect. The outer cavity structure 12 includes an outer cavity body and a positioning member connected to the lower end of the outer cavity body. The positioning member is used for installation and positioning in the installation area. The inner cavity structure is connected to the outer cavity body. The outer cavity body is arranged as a conical structure, and the radius of the upper end of the outer cavity structure 12 is smaller than that of the lower end, which can gradually increase the upward flow pressure of the air from bottom to top, so that the wind force at the air outlet of the second flow path group 200 is greater than that at the air outlet of the first flow path group 100, and the wind force at the air outlet of the third flow path group 300 is greater than that at the air outlet of the second flow path group 200. Furthermore, more air can be provided by the second flow path group 200 for secondary combustion than the first flow path group 100 for combustion assistance, and more air can be provided by the third flow path group 300 for tertiary combustion than the second flow path group 200 for combustion assistance. And because the temperature of the air is also getting higher and higher during the upward flow process due to the influence of the temperature in the combustion chamber, the combustion assistance effect of the air introduced into the combustion chamber through the second flow path group 200 is better than that introduced through the first flow path group 100, and the combustion assistance effect of the air introduced into the combustion chamber through the third flow path group 300 is better than that introduced through the second flow path group 200.

[0040] In some specific embodiments, the circumferential dimension of the upper inner cavity portion 113 is greater than that of the lower inner cavity portion 111. That is to say, the radius of the upper inner cavity portion 113 is greater than that of the lower inner cavity portion 111. After the lower end of the middle inner cavity portion 112 is combined with the lower inner cavity portion 111 and the upper end is combined with the upper inner cavity portion 113, a wedge-shaped structure with a smaller lower part and a larger upper part is formed. A plurality of second air outlet holes 1121 are formed through the middle inner cavity portion 112, and the second air outlet holes 1121 form the air outlets of the second flow path group 200. A plurality of third air outlet holes 1131 are formed through the upper inner cavity portion 113, and the third air outlet holes 1131 form the air outlets of the third flow path group 300. This combination method can be welding or integrally formed. The wedge-shaped structure design, on the one hand, makes the wind power gradually increase during the upward flow between the inner cavity structure 11 and the outer cavity structure 12, so that the combustion-supporting effect of the combustion-supporting air introduced into the combustion chamber through the third flow path group 300 is better than that introduced through the second flow path group 200. On the other hand, it makes the air easier to enter the second air outlet holes 1121 on the middle inner cavity portion 112 after rising along the lower inner cavity portion 111, preventing the air from directly passing over the second air outlet holes 1121 and only entering the combustion chamber through the third air outlet holes 1131, thereby ensuring the effective combustion support of the second flow path group 200. In this embodiment, the middle inner cavity portion 112 is arranged as a conical ring plate structure, and the outer diameter of the middle inner cavity portion 112 gradually increases in the upward direction, and the inner diameter of the middle inner cavity portion 112 gradually increases in the upward direction. The second air outlet holes 1121 are arranged in an inclined upward direction, so that the air can be sprayed into the combustion chamber in an inclined upward direction, and the swirling air in the combustion chamber flows in a spiral upward manner, which can further promote the full mixing of combustibles such as fuel, fuel debris, and carbon monoxide with air, making the fuel combustion more sufficient and more complete.

[0041] Such as Figure 3As shown, in some specific embodiments, the second air diversion path group 200 includes the first path segment a, the second path segment b, the fourth path segment d formed by extending upward from the second ventilation hole 1141 of the lower support table surface 114 and along the region enclosed between the inner wall of the outer cavity structure 12 and the outer wall of the lower inner cavity portion 111, and the fifth path segment e arranged upward and formed along the region enclosed between the inner wall of the outer cavity structure 12 and the outer wall of the middle inner cavity portion 112. The fourth path segment d is used to guide air to enter the spaced chamber formed by surrounding the inner cavity structure 11 and the outer cavity structure 12 through the second ventilation hole 1141, and flow upward along the outer wall of the lower inner cavity portion 111 and the inner wall of the outer cavity structure 12. The fifth path segment e is used to guide air to flow upward along the outer wall of the middle inner cavity portion 112 and the inner wall of the outer cavity structure 12, and a part of the air flowing along the fifth path segment e can enter the combustion chamber through the second air outlet hole 1121. The width of the fourth path segment d is smaller than the width of the second path segment b, so that the wind force in the fourth path segment d is greater than the wind force in the second path segment b. The width of the fifth path segment e gradually decreases in the upward direction for air diversion, so that the wind force in the fifth path segment e is gradually greater than the wind force in the fourth path segment d from bottom to top.

[0042] In some specific embodiments, the third air diversion path group 300 includes the first path segment a, the second path segment b, the fourth path segment d, the fifth path segment e, and the sixth path segment f arranged upward and formed along the region enclosed between the inner wall of the outer cavity structure 12 and the outer wall of the upper inner cavity portion 113. The sixth path segment f is used to guide air to flow upward along the outer wall of the upper inner cavity portion 113 and the inner wall of the outer cavity structure 12, and a part of the air flowing along the sixth path segment f can enter the combustion chamber through the third air outlet hole 1131. The wind force in the sixth path segment f is greater than the wind force in the fifth path segment e.

[0043] As Figure 7As shown, in some specific embodiments, a fire concentrating ring 7 is further included. The fire concentrating ring 7 is used to gather the air introduced into the combustion chamber through the air outlet of the third air guiding path group 300 in the fire concentrating ring 7, assisting the fire around the opening position of the combustion chamber to burn more vigorously. The upper support tabletop 115 includes a second support edge 1151 formed by flanging outward from the top of the upper inner cavity portion 113, and a second limiting edge 1152 formed by flanging upward from the outer end of the second support edge 1151. Among them, the fire concentrating ring 7 is placed on the upper side of the second support edge 1151 and is limited from radially moving relative to the combustion structure 1 by the second limiting edge 1152. The operator can directly move the fire concentrating ring 7 upward out of the combustion structure 1 to selectively use or not use the fire concentrating ring 7. The third air outlet hole 1131 is arranged on the upper inner cavity portion 113 near the upper support tabletop 115. An air return area is formed around between the upper support tabletop 115, the upper inner cavity portion 113, and the outer cavity structure 12. Part of the air can press against the second support edge 1151 after rising along the outer wall of the upper inner cavity portion 113, and flow downward under the rebound of the second support edge 1151 to guide the rising air to return to the third air outlet hole 1131.

[0044] As Figure 9 shown, in some specific embodiments, the air guiding structure 3 is arranged above the air inlet passage 20 to ensure that external air can flow upward through the air inlet passage 20 to the air guiding passage 30. The air guiding structure 3 includes a support plate 31 and an adjusting plate 32 coaxially arranged under the support plate 31. The outer peripheral side of the support plate 31 is combined with the inner side of the wall portion of the support structure 2. After combination, an installation area for movably placing the combustion structure 1 is formed around between the outer peripheral edge of the top of the support plate 31 and the inner side of the wall portion of the support structure 2. This combination method can be welding or integrally formed. The installation area is arranged around the outer periphery of this surrounding area to ensure that the air guiding passage 30 in the surrounding area can enter the combustion structure 1. The combustion structure 1 is placed as a whole on the support plate 31 and is limited from radially moving relative to the support structure 2 by the inner side of the wall portion of the support structure 2. The operator can directly move the combustion structure 1 as a whole upward out of the support structure 2 and then pour the ash in the ash pan 4. The wall portion or the support feet 21 of the support structure 2 can serve as a grasping structure for the operator to hold when pouring the ash in the ash pan 4, avoiding directly holding the ash pan 4 to pour the ash in the ash pan 4 and causing burns. A support ring 121 is formed by flanging inward from the lower end of the outer cavity structure 12. The combustion structure 1 is supported on the upper side of the support plate 31 through the support ring 121, which is better for the stability of the installation of the combustion structure 1.

[0045] In some specific embodiments, the ash pan 4 is connected to the support plate 31 through the first connection structure 6, and the adjustment plate 32 is rotatably connected to the support plate 31 through the rotation shaft 8 arranged along the axis of the support plate 31. In this embodiment, the support plate 31 is provided with a first connection hole 312 along its axis, and the adjustment plate 32 is provided with a second connection hole 322 along its axis. The support plate 31 and the adjustment plate 32 are rotatably connected through bolts inserted into the first connection hole 312 and the second connection hole 322 and nuts matched and connected to the bolts. The connection shaft part of the bolt forms the rotation shaft 8, which has a simple structure and is easy to install and disassemble.

[0046] In some specific embodiments, the air guide channel 30 includes an air inlet hole 311 penetrating the support plate 31, and an adjustment hole 321 penetrating the adjustment plate 32 corresponding to the air inlet hole 311. The adjustment plate 32 can rotate between a fully open position and a closed position relative to the support plate 31. In the fully open position, the adjustment hole 321 and the air inlet hole 311 are arranged opposite to each other and are connected to each other. At this time, the air volume entering the combustion structure 1 is the largest. In the closed position, the adjustment hole 321 and the air inlet hole 311 are arranged in a staggered manner, and the adjustment hole 321 is blocked by the support plate 31, and the air inlet hole 311 is blocked by the adjustment plate 32. At this time, air cannot enter the combustion structure 1 through the air guide structure 3. By rotating the adjustment plate 32 relative to the support plate 31 between the fully open position and the closed position, the area of ​​the adjustment hole 321 and the air inlet hole 311 connected to each other is adjusted, thereby adjusting the air volume.

[0047] like Figure 1 , Figure 2 , Figure 9 As shown, in some specific embodiments, an operating portion 323 is extended outward from one side of the adjustment plate 32 for the operator to rotate the adjustment plate 32 relative to the support plate 31, and a guide channel 22 is provided on the wall of the support structure 2. The operating portion 323 passes through the guide channel 22 and extends out of the outside of the support structure 2, and can move along the guide channel 22 to drive the adjustment plate 32 to rotate relative to the support plate 31 between a fully open position and a closed position.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0049] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A fully combustion-supported stove, characterized in that: include: A combustion structure having an inner cavity structure, an outer cavity structure and a combustion chamber, wherein the combustion chamber is defined inwardly by the inner cavity structure; A support structure is detachably connected to the lower part of the combustion structure, the support structure includes support feet for being placed on the support interface, and gaps are provided along the wall of the support structure between adjacent support feet, and an air inlet channel is formed by the gaps; An air guide structure capable of adjusting the air volume, the air guide structure is arranged directly below the combustion chamber and connected to the supporting structure, and the air guide structure is provided with a plurality of air guide channels along the circumferential direction; An ash pan connected to the upper portion of the air guide structure via a first connecting structure, wherein the ash pan is provided with a plurality of ventilation holes along its side wall; A grate located directly above the ash pan, the grate being movable and placed on the ash pan, and having a plurality of air outlets; and a first flow guide path group for allowing external air to enter the combustion chamber for combustion assistance, a second flow guide path group with an air outlet located above the air outlet of the first flow guide path group, and a third flow guide path group with an air outlet located above the air outlet of the second flow guide path group, wherein the ventilation hole 1 is arranged on the first flow guide path group, the air outlet 1 forms the air outlet of the first flow guide path group, the air outlet of the second flow guide path group is arranged around the middle of the combustion chamber, and the air outlet of the third flow guide path group is arranged around the upper part of the combustion chamber; The inner cavity structure includes a lower inner cavity portion, a middle inner cavity portion, and an upper inner cavity portion. The lower end of the middle inner cavity portion is combined with the lower inner cavity portion, and the upper end is combined with the upper inner cavity portion to form a wedge-shaped structure with a smaller bottom and a larger top. The middle inner cavity portion is penetrated by a plurality of air outlet holes 2, and the air outlet holes 2 form the air outlet of the second guide path group; the upper inner cavity portion is penetrated by a plurality of air outlet holes 3, and the air outlet holes 3 form the air outlet of the third guide path group; the second guide path group includes a fifth path section which is arranged upward and formed along the area surrounded by the inner wall of the outer cavity structure and the outer wall of the middle inner cavity portion, and part of the air flowing along the fifth path section can enter the combustion chamber through the air outlet holes 2; the third guide path group includes the fifth path section, and a sixth path section which is arranged upward and formed along the area surrounded by the inner wall of the outer cavity structure and the outer wall of the upper inner cavity portion, and part of the air flowing along the sixth path section can enter the combustion chamber through the air outlet holes 3.

2. The fully combustion-supported stove according to claim 1, characterized in that: The first guide path group includes a first path formed by entering from the air inlet channel of the notch and passing through the air guide channel to form the air guide structure, and a second path formed from the top of the air guide structure upward and along the area enclosed between the inner wall of the outer cavity structure and the outer wall of the ash tray, wherein the width of the second path gradually decreases from bottom to top for guiding the air.

3. The fully combustion-supported stove according to claim 2, characterized in that: The first flow guide path group also includes a third path arranged upward from ventilation hole 1 of the ash pan and penetrating the grate through air outlet hole 1. The ventilation hole 1 is arranged close to the upper end of the side wall of the ash pan, and the air outlet hole 1 forms an outlet of the first flow guide path group.

4. The fully combustion-supported stove according to claim 3, characterized in that: The ash pan includes a pan bottom plate, pan side plates extending upward from the periphery of the pan bottom plate, and a pan edge structure formed by turning the top of the pan side plates outward, the pan edge structure is sleeved in the inner cavity structure, the grate is movably placed on the pan edge structure, and the ventilation hole is arranged on the pan side plate near the pan edge structure.

5. The fully combustion-supported stove according to claim 4, characterized in that: The wind guide structure has a middle area arranged directly below the bottom plate of the disk, and a peripheral area arranged around the middle area, wherein a part of the wind guide channel is arranged in the middle area of ​​the wind guide structure, and another part of the wind guide channel is arranged in the peripheral area of ​​the wind guide structure; The disc bottom plate is arranged above the air guide structure at intervals, and the first connection structure includes a plurality of support feet arranged between the disc bottom plate and the air guide structure along the circumferential direction, and a spacing area connected to the air guide channel in the middle area is formed between adjacent support feet.

6. The fully combustion-supported stove according to any one of claims 1 to 5, characterized in that: The inner cavity structure also includes a lower support table formed by turning the bottom of the lower inner cavity portion outward, and an upper support table formed by turning the top of the upper inner cavity portion outward; The lower support table is arranged above the air guide structure at intervals, and the outer end of the lower support table is combined with the inner wall of the outer cavity structure, and a plurality of ventilation holes are provided through the lower support table; the outer end of the upper support table is combined with the outer cavity structure; The circumferential size of the upper inner cavity portion is greater than the circumferential size of the lower inner cavity portion.

7. The fully combustion-supported stove according to claim 6, characterized in that: The second guide path group also includes a first path formed by entering from the air inlet channel of the notch and passing through the air guide structure through ventilation hole 1, a second path formed from the top of the air guide structure upward and along the area surrounded by the inner wall of the outer cavity structure and the outer wall of the ash tray, and a fourth path formed from ventilation hole 2 of the lower support table upward and along the area surrounded by the inner wall of the outer cavity structure and the outer wall of the lower inner cavity part. The width of the second path gradually decreases from bottom to top for diversion, the width of the fourth path is smaller than the width of the second path, and the width of the fifth path gradually decreases from bottom to top for diversion.

8. The fully combustion-supported stove according to claim 7, characterized in that: The middle inner cavity is configured as a cone ring plate structure, and the outer diameter of the middle inner cavity gradually increases from bottom to top, the inner diameter of the middle inner cavity gradually increases from bottom to top, and the second air outlet is arranged in an inclined upward direction.

9. The fully combustion-supported stove according to claim 6, characterized in that: The third guide path group also includes a first path formed by entering from the air inlet channel of the notch and passing through the air guide structure through ventilation hole 1, a second path formed by extending from the top of the air guide structure upward along the area surrounded by the inner wall of the outer cavity structure and the outer wall of the ash tray, and a fourth path formed by extending from ventilation hole 2 of the lower support table upward along the area surrounded by the inner wall of the outer cavity structure and the outer wall of the lower inner cavity portion. The width of the second path gradually decreases from bottom to top for diversion, the width of the fourth path is smaller than the width of the second path, and the width of the fifth path gradually decreases from bottom to top for diversion.

10. The fully combustion-supported stove according to any one of claims 1 to 5, characterized in that: The air guide structure is arranged above the air inlet channel, and includes a support plate and an adjustment plate coaxially arranged at the lower side of the support plate. The outer peripheral side of the support plate is combined with the inner side of the wall portion of the support structure. After the combination, the outer peripheral edge of the top of the support plate and the inner side of the wall portion of the support structure surround and form an installation area for movably placing the combustion structure. The ash pan is connected to the support plate through a first connecting structure. The adjustment plate is rotatably connected to the support plate via a rotating shaft arranged along the axis of the support plate, the air guide channel includes an air inlet hole penetrating the support plate, and an adjustment hole corresponding to the air inlet hole penetrating the adjustment plate, the adjustment plate can rotate relative to the support plate between a fully open position and a closed position, when in the fully open position, the adjustment hole and the air inlet hole are arranged opposite to each other and connected to each other; when in the closed position, the adjustment hole and the air inlet hole are staggered with each other, and the adjustment hole is blocked by the support plate, and the air inlet hole is blocked by the adjustment plate.

Images