Heating stove

Abstract

This utility model relates to the technical field of hot water supply equipment and discloses a heating boiler, including: a shell, an air filter module, a condensing heat exchanger, and a main heat exchanger; the shell has an air inlet, the air filter module is located inside the shell and divides the interior of the shell into a first air inlet chamber and a second air inlet chamber; the air filter module includes an air filter housing and an air filter element, the air filter housing has a non-communicating installation chamber and a flue gas chamber; the air filter element is installed in the installation chamber, the condensing heat exchanger is located in the flue gas chamber, and the flue gas outlet of the main heat exchanger is connected to the flue gas inlet of the flue gas chamber; along the air flow direction, the air inlet, the first air inlet chamber, the installation chamber, and the second air inlet chamber are sequentially connected. The condensing heat exchanger installed in the flue gas chamber can not only absorb the waste heat in the flue gas, but also transfer some of the absorbed heat to the air filter element in the form of thermal radiation, increasing the temperature of the air filter element itself. In this way, the air filter element can preheat the air, improving the combustion efficiency of the subsequent gas.

Description

Technical Field

[0001] This utility model relates to the field of hot water supply equipment technology, and in particular to a heating furnace. Background Technology

[0002] As people's living standards continue to improve, their requirements for indoor heating comfort are also increasing. People generally use gas-fired boilers to achieve both heating and bathroom functions. The heating function usually starts operating during the winter season, releasing heat through gas combustion to heat the circulating water inside the boiler. The hot water is then delivered to heat dissipation devices such as underfloor heating and radiators, releasing heat into the indoor space through radiation or convection to keep the indoor temperature stable within a comfortable range.

[0003] However, since the air flowing into the heating furnace from the outside is relatively cold, if it is directly mixed with the gas for combustion, it will increase heat loss and reduce combustion efficiency. Utility Model Content

[0004] This invention provides a heating stove that can preheat the air flowing into it, thereby improving combustion efficiency.

[0005] The above-mentioned technical problems are solved by the following technical solutions: A heating furnace includes: an outer shell, an air filter module, a condensing heat exchanger, and a main heat exchanger; the outer shell has an air inlet, the air filter module is disposed inside the outer shell and divides the interior of the outer shell into a first air inlet chamber and a second air inlet chamber; the air filter module includes an air filter housing and an air filter element, the air filter housing has a non-communicating mounting cavity and a smoke exhaust cavity; the air filter element is installed in the mounting cavity, the condensing heat exchanger is disposed in the smoke exhaust cavity, and the smoke outlet of the main heat exchanger is connected to the smoke inlet of the smoke exhaust cavity; along the air flow direction, the air inlet, the first air inlet chamber, the mounting cavity, and the second air inlet chamber are sequentially connected.

[0006] Compared with the prior art, the heating furnace of this utility model has the following advantages: This utility model sets up an independent installation cavity and a flue gas cavity within the air filter module at the air inlet of the furnace shell, and installs a condensing heat exchanger in the flue gas cavity. This allows the condensing heat exchanger to absorb the waste heat from the flue gas to preheat the heating water entering the main heat exchanger or the bathroom water entering the plate heat exchanger. Simultaneously, it can transfer some of the collected heat to the air filter element installed in the installation cavity through thermal radiation, raising the temperature of the air filter element itself. Thus, when outside air enters from the air inlet, flowing sequentially through the first air inlet cavity and the installation cavity, the heated air filter element preheats the incoming air, effectively increasing the initial temperature of the air entering the second air inlet cavity. This effectively solves the technical problem of increased heat loss due to low air temperature, leading to reduced combustion efficiency. Specifically, compared to low-temperature air directly participating in combustion, the preheated air does not need to consume part of the heat generated by fuel combustion to raise its own temperature; instead, it can directly and thoroughly mix with the fuel and quickly reach the optimal combustion temperature. Furthermore, preheated air molecules are more active and mix more evenly with fuel, thus reducing incomplete combustion caused by insufficient local air supply. This reduces fuel waste, improves combustion efficiency, and lowers the emissions of harmful gases from incomplete combustion. Moreover, by incorporating a condenser heat exchanger within the exhaust chamber, this invention increases the flow resistance of high-temperature flue gas within the exhaust channel, extending its residence time. This, in turn, prolongs the heat transfer time between the high-temperature flue gas and the low-temperature air in the installation chamber, improving the heating effect on the low-temperature air. Furthermore, by integrating the exhaust chamber and air intake chamber into the air filter module, this invention saves installation space and reduces the occupancy of the internal space of the casing, resulting in a more compact structure.

[0007] In one embodiment, the air filter housing includes a smoke exhaust shell, the smoke exhaust shell having a smoke exhaust chamber inside, the smoke exhaust shell also having a smoke exhaust port and a smoke inlet connected to the smoke exhaust chamber, the smoke exhaust port being connected to the outside, and the smoke inlet being connected to the smoke outlet.

[0008] In one embodiment, the exhaust casing includes a casing body and a sealing cover. The casing body has an installation port on the side near the air inlet. The condensing heat exchanger is assembled into the casing body through the installation port. The sealing cover is located at the installation port. The exhaust port is located on the sealing cover. The exhaust port is located on the casing body and is positioned opposite to the exhaust port.

[0009] In one embodiment, the air filter housing further includes a mounting frame connected to the periphery of the housing body, the mounting frame being detachably connected to the housing; along a first direction, two mounting cavities are formed between the two opposite inner sidewalls of the mounting frame and the outer sidewall of the housing body; along a second direction, opposite sides of the housing body are connected to the mounting frame; the first direction and the second direction are perpendicular to each other.

[0010] In one embodiment, the mounting frame is provided with a clearance opening, and the sealing cover includes a cover body and a flange surrounding the periphery of the cover body. The cover body abuts against the mounting opening, and the flange abuts against the outer wall of the shell body through the clearance opening.

[0011] In one embodiment, the exhaust casing is further provided with a flow-blocking element, which is located between the condenser heat exchanger and the exhaust port, and the flow-blocking element is spaced apart from and opposite to the exhaust port.

[0012] In one embodiment, the flow obstruction includes a flow obstruction plate and a connecting plate, the flow obstruction plate being fixed at the exhaust port via the connecting plate; along the flow direction of the flue gas, the orthogonal projection of the exhaust port toward the flow obstruction plate falls within the range of the flow obstruction plate.

[0013] In one embodiment, there are multiple connecting plates, which are spaced apart around the exhaust port and connect the baffle plate and the exhaust housing, with a first gap between adjacent connecting plates.

[0014] In one embodiment, the exhaust port is provided with a first annular flange extending out of the air inlet, and a second gap is left between the first annular flange and the air inlet, through which the first air intake chamber is connected to the external environment; and / or, the exhaust port is provided with a second annular flange extending into the exhaust port, and a sealing gasket is provided between the second annular flange and the exhaust port.

[0015] In one embodiment, the air filter housing has a bathroom water inlet and a bathroom water outlet on its side wall. The condenser heat exchanger includes a condenser heat exchange tube, one end of which is connected to the bathroom water inlet and the other end of which is connected to the bathroom water outlet. The bathroom water inlet and the bathroom water outlet are located on the same side wall of the air filter module. The extension direction of the condenser heat exchange tube is perpendicular to the flow direction of the flue gas. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram illustrating the structural principle of a heating stove according to an embodiment of the present utility model; Figure 2 for Figure 1 The diagram shown is of an air filtration module without an air filter element installed. Figure 3 for Figure 1 An exploded view of the air filter module shown. Figure 4 for Figure 3 A magnified view of part A in the image; Figure 5 This is a partial structural cross-sectional view of a heating furnace according to an embodiment of the present utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Outer shell; 101. Air inlet; 102. First air intake chamber; 103. Second air intake chamber; 2. Air filter module; 201. Mounting chamber; 202. Smoke exhaust chamber; 203. Air filter element; 204. Smoke exhaust outer shell; 2041. Smoke inlet; 2042. Smoke exhaust outlet; 2043. Sealing cover; 20431. Cover body; 20432. Flanged edge; 2044. Shell body; 2045. Mounting port; 205. Mounting frame; 206 1. Clearance opening; 206. Bathroom water inlet interface; 207. Bathroom water outlet interface; 3. Condensing heat exchanger; 4. Main heat exchanger; 401. Smoke outlet; 5. Flow baffle; 501. Flow baffle plate; 502. Connecting plate; 6. First gap; 7. First annular flange; 8. Second gap; 9. Second annular flange; 10. Burner; 11. Plate heat exchanger; 1101. First heat exchange channel; 1102. Second heat exchange channel; 12. Sealing gasket. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "upper", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0024] According to embodiments of the present invention, such as Figures 1 to 5 As shown, a heating furnace is provided, including: a shell 1, an air filter module 2, a condensing heat exchanger 3, and a main heat exchanger 4; the shell 1 is provided with an air inlet 101, the air filter module 2 is disposed inside the shell 1 and divides the interior of the shell 1 into a first air inlet chamber 102 and a second air inlet chamber 103; the air filter module 2 includes an air filter housing and an air filter element 203, the air filter housing is provided with an installation cavity 201 and a smoke exhaust cavity 202 that are not connected to each other; the air filter element 203 is installed in the installation cavity 201, the condensing heat exchanger 3 is disposed in the smoke exhaust cavity 202, and the smoke outlet 401 of the main heat exchanger 4 is connected to the smoke inlet 2041 of the smoke exhaust cavity 202; along the air flow direction, the air inlet 101, the first air inlet chamber 102, the installation cavity 201 and the second air inlet chamber 103 are connected sequentially.

[0025] This utility model embodiment sets up an installation cavity 201 and a flue gas cavity 202 that are not interconnected within the air filter module 2 at the air inlet 101 of the heating furnace shell 1, and sets up a condensing heat exchanger 3 in the flue gas cavity 202. In this way, the condensing heat exchanger 3 can absorb the waste heat in the flue gas to heat the heating water entering the main heat exchanger 4 or the bathroom water entering the plate heat exchanger 11. At the same time, it can also transfer some of the collected heat to the air filter element 203 through the shape of thermal radiation, so that the temperature of the air filter element 203 itself increases. In this way, when the outside air enters the first air inlet cavity 102 and passes through the air filter element 203, the heated air filter element 203 will preheat the incoming air and effectively increase the initial temperature of the air entering the second air inlet cavity 103. This effectively solves the technical problem of increased heat loss due to low air temperature, which leads to reduced combustion efficiency. Specifically, compared to cold air directly participating in combustion, preheated air does not need to consume some of the heat generated by fuel combustion to raise its own temperature. Instead, it can directly and thoroughly mix with the fuel and quickly reach the optimal combustion temperature. In addition, preheated air molecules are more active and mix more evenly with the fuel. Therefore, it can reduce incomplete combustion caused by insufficient local air supply, thereby reducing fuel waste, improving combustion efficiency, and reducing the emission of harmful gases from incomplete combustion.

[0026] Furthermore, by installing a condensing heat exchanger 3 within the exhaust chamber 202, this embodiment of the invention increases the flow resistance of the high-temperature flue gas within the exhaust channel, prolonging its residence time. This extends the time for heat conduction and exchange between the high-temperature flue gas in the exhaust chamber 202 and the low-temperature air in the mounting chamber 201, improving the heating effect on the low-temperature air. In addition, since the condensing heat exchanger 3 can also exchange heat with the high-temperature flue gas, it further absorbs the sensible and latent heat from the high-temperature flue gas, reducing energy waste caused by the direct discharge of heat carried by the high-temperature flue gas into the external environment.

[0027] Furthermore, this utility model integrates the smoke exhaust chamber 202 and the air intake chamber onto the air filter module 2, which can save installation space and reduce the occupation of the internal space of the outer casing 1, thereby making the structure more compact.

[0028] It should be noted that the "high temperature" and "low temperature" in the above text are not absolute values, but "relative values", which only represent the temperature comparison between flue gas and air.

[0029] It should be further noted that the improvement of this utility model lies in the air filter module 2, and does not involve improvements to other structures of the wall-hung boiler, such as the combustion structure or the hot water structure. In other words, other structures of the wall-hung boiler are not the improvement points of this utility model. Therefore, the unmodified structures in the wall-hung boiler can be conventional structures in the art.

[0030] In one embodiment, such as Figure 1 and Figure 5 As shown, both the air inlet 101 and the air filter module 2 are located on the top of the housing 1. This arrangement allows the high-temperature flue gas to flow naturally towards the outlet without the need for additional power devices (such as fans).

[0031] Furthermore, this embodiment also includes a burner 10 and a plate heat exchanger 11. The burner 10 is arranged opposite to the main heat exchange tube in the main heat exchanger 4. The plate heat exchanger 11 has a first heat exchange channel 1101 and a second heat exchange channel 1102 that exchange heat with each other. The first heat exchange channel 1101 is connected to the main heat exchanger 4 through a heating water pipe and forms an internal circulating water circuit for heating water. The second heat exchange channel 1102 is connected to the outlet of the condensing heat exchanger 3 and the hot water outlet of the heating boiler through a bathroom water pipe and forms a bathroom water circuit.

[0032] It should be noted that the process of a conventional heating boiler providing domestic hot water is as follows: the high-temperature flue gas generated by the boiler combustion first heats the heating water in the main heat exchanger 4, and then the heated heating water is transported through the heating water pipeline to the first heat exchange channel 1101 of the plate heat exchanger 11; the bathroom water to be heated is transported through the bathroom water pipeline to the second heat exchange channel 1102. Since the temperature of the heating water in the first heat exchange channel 1101 is higher than the temperature of the bathroom water in the second heat exchange channel 1102, heat is transferred from the first heat exchange channel 1101 to the second heat exchange channel 1102 through the metal plates of the plate heat exchanger 11, causing the bathroom water temperature to gradually rise to the set value. However, the heating water first absorbs the residual heat from the flue gas, and energy loss occurs during the heating of the bathroom water through the plate heat exchanger 11, thus reducing the heat exchange efficiency of the bathroom water. Based on this, this embodiment can preheat the bathroom water before it enters the second heat exchange channel 1102 by installing a condensing heat exchanger 3 in the flue gas chamber 202, thereby reducing the temperature difference required for subsequent heat exchange with the heating water, reducing the consumption of gas, and thus reducing environmental pollution, which meets the environmental protection requirements of energy conservation and emission reduction.

[0033] In one embodiment, such as Figures 2 to 5 As shown, the air filter housing includes a smoke exhaust shell 204, within which a smoke exhaust chamber 202 is provided. The smoke exhaust shell 204 also has a smoke exhaust port 2042 and a smoke inlet 2041 connected to the smoke exhaust chamber 202. The smoke exhaust port 2042 communicates with the outside, and the smoke inlet 2041 communicates with the smoke outlet 401. The smoke exhaust shell 204 isolates the smoke exhaust chamber 202 from the mounting cavity 201, preventing interference between smoke exhaust and air intake.

[0034] In one embodiment, such as Figures 2 to 5As shown, the exhaust casing 204 includes a casing body 2044 and a sealing cover 2043. The casing body 2044 has an installation port 2045 on the side near the air inlet 101. The condenser heat exchanger 3 is assembled into the casing body 2044 through the installation port 2045. The sealing cover 2043 is located at the installation port 2045, the exhaust port 2042 is located on the sealing cover 2043, and the exhaust port 2041 is located on the casing body 2044 and is opposite to the exhaust port 2042. It can be understood that the installation port 2045 on the casing body 2044 facilitates the placement and removal of the condenser heat exchanger 3 from the casing body 2044, reducing the difficulty of initial assembly and subsequent maintenance. Furthermore, placing the sealing cover 2043 at the installation port 2045 prevents high-temperature flue gas from leaking from the installation port 2045, ensuring the airtightness of the exhaust chamber 202. Furthermore, since high-temperature flue gas has the characteristic of naturally flowing upward, and the flue gas inlet 2041 and flue gas outlet 2042 in this embodiment are arranged opposite to each other, they just follow the natural flow trend of the flue gas, so that the high-temperature flue gas can flow smoothly upward along the flue gas outlet 202 and be discharged from the flue gas outlet 2042 without additional power.

[0035] In one embodiment, such as Figure 2 and Figure 3 As shown, the air filter housing also includes a mounting frame 205 connected to the periphery of the housing body 2044, and the mounting frame 205 is detachably connected to the outer shell 1. Along a first direction, two mounting cavities 201 are formed between the two opposite inner sidewalls of the mounting frame 205 and the outer sidewall of the housing body 2044. Along a second direction, opposite sides of the housing body 2044 are connected to the mounting frame 205. The first and second directions are perpendicular to each other. It can be understood that by connecting the opposite sides of the housing body 2044 to the mounting frame 205 in the second direction, this embodiment ensures a stable connection between the housing body 2044 and the mounting frame 205 while achieving the adjacent arrangement and integration of the exhaust chamber 202 and the mounting cavities 201. This not only makes the structure more compact but also shortens the heat transfer path between the exhaust chamber 202 and the mounting cavities 201, improving heat exchange efficiency.

[0036] In one embodiment, such as Figures 2 to 4As shown, the mounting frame 205 is provided with a clearance opening 2051. The sealing cover 2043 includes a cover body 20431 and a flange 20432 surrounding the cover body 20431. The cover body 20431 abuts against the mounting opening 2045, and the flange 20432 abuts against the outer wall of the shell body 2044 through the clearance opening 2051. It can be understood that in this embodiment, the cover body 20431 abuts against the mounting opening 2045, and the flange 20432 abuts against the outer wall of the shell body 2044. On the one hand, this increases the contact area between the sealing cover 2043 and the shell body 2044, improving the connection stability between the two; on the other hand, it achieves a double seal on the mounting opening 2045, reducing the possibility of leakage at the mounting opening 2045.

[0037] It can be understood that, in order to further improve the sealing effect of the sealing cap 2043 on the mounting port 2045, a sealing ring can be set between the sealing cap 2043 and the mounting port 2045.

[0038] In one embodiment, such as Figure 3 As shown, a flow-blocking element 5 is also provided inside the flue gas exhaust casing 204. The flow-blocking element 5 is located between the condenser heat exchanger 3 and the flue gas outlet 2042, and is spaced apart from and opposite to the flue gas outlet 2042. This arrangement can reduce the speed at which the flue gas flows out of the flue gas outlet 2042 and prolong the residence time of the flue gas in the flue gas exhaust chamber 202.

[0039] In one embodiment, such as Figure 3 As shown, the flow-blocking component 5 includes a flow-blocking plate 501 and a connecting plate 502. The flow-blocking plate 501 is fixed to the exhaust port 2042 via the connecting plate 502. Along the flow direction of the flue gas, the orthogonal projection of the exhaust port 2042 toward the flow-blocking plate 501 falls within the range of the flow-blocking plate 501. This arrangement allows the high-temperature flue gas to collide with the flow-blocking plate 501 before reaching the exhaust port 2042, forcing the flue gas to change its flow direction and disperse, preventing the flue gas from being directly and rapidly discharged, and prolonging the residence time of the high-temperature flue gas within the exhaust casing 204.

[0040] In one embodiment, multiple connecting plates 502 are spaced apart and arranged around the periphery of the exhaust port 2042, connecting the baffle plate 501 and the exhaust housing 204. A first gap 6 is left between adjacent connecting plates 502. It can be understood that using multiple connecting plates 502 to connect the baffle plate 501 and the exhaust housing 204 improves the connection stability between the baffle plate 501 and the exhaust housing 204, preventing the baffle plate 501 from detaching from the exhaust housing 204 under prolonged impact from the flue gas. Furthermore, the spaced arrangement of multiple connecting plates 502 ensures that the flue gas dispersed by the baffle plate 501 is smoothly discharged through the second gap 8, avoiding obstruction of the exhaust gas flow.

[0041] In one embodiment, such as Figures 1 to 5 As shown, a first annular flange 7 extending from the air inlet 101 is provided at the smoke exhaust port 2042, and a second gap 8 is left between the first annular flange 7 and the air inlet 101. The first air intake chamber 102 is connected to the external environment through the second gap 8; and / or, a second annular flange 9 extending into the smoke exhaust port 401 is provided at the smoke exhaust port 2041, and a sealing gasket 12 is provided between the second annular flange 9 and the smoke exhaust port 401. It can be understood that in this embodiment, the first annular flange 7 is provided at the smoke exhaust port 2042, which on the one hand can guide the flue gas to be smoothly discharged from the outer casing 1, and on the other hand can isolate the smoke exhaust chamber 202 from the first air intake chamber 102 to avoid mutual interference between smoke exhaust and air intake. In addition, the second gap 8 left between the first annular flange 7 and the air inlet 101 can not only ensure that the outside air can be smoothly entered into the first air intake chamber, but also allow the air to come into contact with the first annular flange 7, so as to achieve heat exchange with the high-temperature flue gas inside the first annular flange 7. By setting the second annular flange 9, the flow of flue gas can be guided, allowing the flue gas to flow more smoothly from the main heat exchanger 4 into the exhaust chamber 202. The sealing gasket 12 between the second annular flange 9 and the exhaust port 401 can improve the sealing performance at the connection between the two and prevent high-temperature flue gas from leaking at the connection between the exhaust port 2041 and the exhaust port 401.

[0042] In one embodiment, such as Figures 1 to 5 As shown, the air filter housing has a bathroom water inlet 206 and a bathroom water outlet 207 on its side wall. The condenser heat exchanger 3 includes a condenser heat exchange tube, one end of which is connected to the bathroom water inlet 206, and the other end is connected to the bathroom water outlet 207. The bathroom water inlet 206 and the bathroom water outlet 207 are located on the same side wall of the air filter module 2. The extension direction of the condenser heat exchange tube is perpendicular to the flow direction of the flue gas. It can be understood that by setting the bathroom water inlet 206 and the bathroom water outlet 207 on the same side in this embodiment, the inconvenience caused by operators operating from both sides can be avoided, and the convenience of early assembly and later maintenance can be improved. The extension direction of the condenser heat exchange tube is perpendicular to the flow direction of the flue gas, which allows the high-temperature flue gas to pass laterally through the dense heat exchange tubes during the flow process, increasing the contact area and contact time between the flue gas and the condenser heat exchange tube, so that the sensible heat and latent heat (such as the condensation heat of water vapor) in the flue gas can be more fully transferred to the bathroom water in the tube.

[0043] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0044] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heating stove, characterized in that include: The housing (1), air filter module (2), condenser heat exchanger (3) and main heat exchanger (4) are provided; the housing (1) is provided with an air inlet (101), and the air filter module (2) is located inside the housing (1) and divides the interior of the housing (1) into a first air inlet chamber (102) and a second air inlet chamber (103). The air filtration module (2) includes an air filter housing and an air filter element (203). The air filter housing has an installation cavity (201) and a smoke exhaust cavity (202) that are not connected to each other. The air filter element (203) is installed in the installation cavity (201). The condenser heat exchanger (3) is located in the smoke exhaust cavity (202). The smoke outlet (401) of the main heat exchanger (4) is connected to the smoke inlet (2041) of the smoke exhaust cavity (202). Along the air flow direction, the air inlet (101), the first air inlet cavity (102), the installation cavity (201) and the second air inlet cavity (103) are connected in sequence.

2. The heating stove according to claim 1, characterized in that: The air filter housing includes a smoke exhaust shell (204), the smoke exhaust shell (204) is provided with a smoke exhaust chamber (202), the smoke exhaust shell (204) is also provided with a smoke exhaust port (2042) and a smoke inlet (2041) connected to the smoke exhaust chamber (202), the smoke exhaust port (2042) is connected to the outside, and the smoke inlet (2041) is connected to the smoke outlet (401).

3. The heating stove according to claim 2, characterized in that: The exhaust casing (204) includes a casing body (2044) and a sealing cover (2043). The casing body (2044) has an installation port (2045) on the side near the air inlet (101). The condensing heat exchanger (3) is assembled into the casing body (2044) through the installation port (2045). The sealing cover (2043) is located at the installation port (2045). The exhaust port (2042) is located on the sealing cover (2043). The exhaust port (2041) is located on the casing body (2044) and is arranged opposite to the exhaust port (2042).

4. The heating stove according to claim 3, characterized in that: The air filter housing also includes a mounting frame (205) connected to the periphery of the housing body (2044), the mounting frame (205) being detachably connected to the outer shell (1); along a first direction, two mounting cavities (201) are formed between the inner sidewall of the mounting frame (205) and the two opposite outer sidewalls of the housing body (2044); along a second direction, the opposite sides of the housing body (2044) are connected to the mounting frame (205); the first direction and the second direction are perpendicular to each other.

5. The heating stove according to claim 4, characterized in that: The mounting frame (205) is provided with a clearance opening (2051). The sealing cover (2043) includes a cover body (20431) and a flange (20432) surrounding the cover body (20431). The cover body (20431) abuts against the mounting opening (2045), and the flange (20432) abuts against the outer wall of the shell body (2044) through the clearance opening (2051).

6. The heater as claimed in claim 2, wherein: The exhaust casing (204) is also provided with a flow-blocking element (5), which is located between the condenser heat exchanger (3) and the exhaust port (2042). The flow-blocking element (5) and the exhaust port (2042) are spaced apart and arranged opposite to each other.

7. The heater as claimed in claim 6, wherein: The flow-blocking component (5) includes a flow-blocking plate (501) and a connecting plate (502). The flow-blocking plate (501) is fixed at the exhaust port (2042) by the connecting plate (502). Along the flow direction of the flue gas, the orthogonal projection of the exhaust port (2042) toward the flow-blocking plate (501) falls within the range of the flow-blocking plate (501).

8. The heating stove according to claim 7, characterized in that: The number of connecting plates (502) is multiple. The multiple connecting plates (502) are spaced apart on the periphery of the exhaust port (2042) and connect the baffle plate (501) and the exhaust shell (204). A first gap (6) is left between two adjacent connecting plates (502).

9. The heater as claimed in claim 2, wherein: The exhaust port (2042) is provided with a first annular flange (7) extending out of the air inlet (101), and a second gap (8) is left between the first annular flange (7) and the air inlet (101). The first air intake chamber (102) is connected to the external environment through the second gap (8); and / or, the exhaust port (2041) is provided with a second annular flange (9) extending into the exhaust port (401), and a sealing gasket (12) is provided between the second annular flange (9) and the exhaust port (401).

10. The heating furnace according to any one of claims 1 to 8, characterized in that: The air filter housing has a bathroom water inlet (206) and a bathroom water outlet (207) on its side wall. The condenser heat exchanger (3) includes a condenser heat exchange tube. One end of the condenser heat exchange tube is connected to the bathroom water inlet (206), and the other end is connected to the bathroom water outlet (207). The bathroom water inlet (206) and the bathroom water outlet (207) are located on the same side wall of the air filter module (2). The extension direction of the condenser heat exchange tube is perpendicular to the flow direction of the flue gas.

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