Condensing heat exchange structure and gas water heater

Abstract

This utility model belongs to the field of heating technology, specifically disclosing a condensing heat exchange structure and a gas-fired hot water device. The condensing heat exchange structure includes a shell and a water receiving box disposed within the shell. An installation opening is provided at the bottom of the shell. The shell contains an interconnected flue gas inlet chamber, a heat exchange chamber, and a flue gas exhaust chamber, all located above the installation opening. The heat exchange chamber is equipped with a condensing heat exchanger, and the chamber wall has a drain outlet. One side of the heat exchange chamber is connected to the flue gas inlet chamber via the flue gas inlet, and the other side is connected to the flue gas exhaust chamber via the flue gas outlet. The water receiving box has a water inlet and a water outlet. The water inlet is located below the water outlet and is used to collect condensate flowing from the water outlet. The water outlet is connected to the flue gas exhaust chamber. A heating element is installed inside the water receiving box to heat the condensate; alternatively, an atomizer is installed inside the water receiving box to atomize the condensate. This design reduces the lateral dimensions, decreases the requirement for lateral installation space, and conforms to the direction of high-temperature flue gas flow.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, and in particular to a condensing heat exchange structure and a gas-fired hot water device. Background Technology

[0002] A gas water heater is a heating device that uses the high-temperature flue gas generated by the combustion of gas to exchange heat with cold water through a main heat exchanger. The flue gas temperature remains high after passing through the main heat exchanger, and direct discharge would result in energy waste. Condensing gas water heaters, in addition to the main heat exchanger, also include a condensing heat exchanger. The condensing heat exchanger consists of a shell and heat exchange tubes installed inside the shell. The heat exchange tubes are connected to the inlet pipe. The flue gas flowing out of the main heat exchanger enters the shell to preheat the cold water in the inlet pipe. The preheated water then enters the main heat exchanger to reach the user's desired temperature. Existing technology provides a condensing gas water heater where the condensing heat exchangers are arranged horizontally side-by-side on one side of the main heat exchanger, connected to it by an exhaust pipe. This results in a large horizontal volume for the gas water heater, requiring significant installation space and negatively impacting the user experience. Utility Model Content

[0003] The first technical problem solved by this utility model is to provide a condensing heat exchange structure that can avoid the problem of large lateral volume caused by the parallel arrangement of the main heat exchanger and condensing heat exchanger in existing condensing gas water heaters, which in turn requires a large lateral installation space and affects the user experience.

[0004] The second technical problem solved by this utility model is to provide a gas-fired hot water device with a condensing heat exchange structure that reduces the lateral volume, thereby solving the problem that the installation of the equipment is constrained by the installation environment and affects the user experience.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A condensation heat exchange structure is provided, comprising:

[0007] The housing has an installation port at its bottom and interconnected smoke inlet chamber, heat exchange chamber, and smoke exhaust chamber. The smoke inlet chamber, heat exchange chamber, and smoke exhaust chamber are all located above the installation port. The heat exchange chamber is equipped with a condensing heat exchanger, and a drain outlet is provided in the chamber wall. One side of the heat exchange chamber is connected to the smoke inlet chamber via a smoke inlet, and the other side of the heat exchange chamber is connected to the smoke exhaust chamber via a smoke outlet.

[0008] A water collection box is disposed inside the housing. The water collection box has a water inlet and a water outlet. The water inlet is located below the water outlet and is used to collect condensate flowing out of the water outlet. The water outlet is connected to the smoke exhaust chamber.

[0009] The water receiving box is equipped with a heating element for heating the condensate; or, the water receiving box is equipped with an atomizer for atomizing the condensate.

[0010] Compared with the prior art, the condensing heat exchange structure of this utility model has the following advantages: Since the bottom of the shell has an installation opening, and the inlet chamber, heat exchange chamber, and exhaust chamber are all located above the installation opening, the entire condensing heat exchange structure can be installed above the main heat exchanger shell through the installation holes. This avoids the problem of large lateral volume caused by horizontal parallel arrangement, reduces the requirement for lateral installation space, and is convenient to use. Moreover, the vertical arrangement conforms to the flow trend of high-temperature flue gas. The arrangement of the inlet chamber, heat exchange chamber, and exhaust chamber inside the shell ensures unidirectional flow of high-temperature flue gas. The high-temperature flue gas discharged from the main heat exchanger shell flows upward along the inlet chamber and enters the heat exchange chamber through the inlet. The condensing heat exchanger is used to exchange heat with the high-temperature flue gas and generate condensate. The water receiving box inside the shell has an inlet and a outlet. The inlet is located below the outlet and is used to collect the condensate flowing out of the outlet. The outlet is connected to the exhaust chamber. The water collection box is equipped with a heating element to heat the condensate; alternatively, it may contain an atomizer to atomize the condensate. The exhaust gas after heat exchange, along with the water vapor generated from heating or atomizing the condensate, flows along the exhaust chamber and is discharged. The exhaust gas carries the water vapor, ensuring all water vapor is discharged, eliminating the need for a separate drainage structure to remove condensate and simplifying the overall design. This also avoids the dripping noise that might occur during the condensate drainage process, preventing noise from affecting the user experience.

[0011] In one embodiment, a heat exchange shell is provided inside the housing, the cavity of the heat exchange shell is the heat exchange chamber, the smoke inlet chamber and the smoke outlet chamber are respectively located on the left and right sides of the heat exchange chamber, and the water receiving box is disposed below the heat exchange shell.

[0012] In one embodiment, the condensation heat exchange structure further includes a smoke collection hood, which is inserted into the housing through the mounting port and the mounting port is sealed. The smoke collection hood is open at both ends, with one end being a smoke collection port and the other end being a smoke exhaust port. The smoke exhaust port is connected to the smoke inlet end of the smoke inlet chamber.

[0013] In one embodiment, the smoke collection hood is L-shaped and includes a smoke collection section and a smoke exhaust section that are interconnected. Along the direction of high-temperature flue gas flow, the smoke collection port, the smoke collection section, the smoke exhaust section, and the smoke exhaust port are arranged in sequence. The water receiving box is located above the smoke collection section, and the smoke exhaust section extends into the smoke inlet end of the smoke inlet chamber.

[0014] In one embodiment, the drain outlet is located on the side of the heat exchange housing facing the exhaust chamber, and the drain outlet extends to connect with the bottom of the heat exchange chamber. The bottom wall of the heat exchange housing is inclined from the exhaust chamber towards the water collection box; and / or,

[0015] The smoke outlet is located on the side of the heat exchange shell facing the smoke exhaust chamber; the drain outlet and the smoke outlet are the same outlet.

[0016] In one embodiment, the smoke inlet is located on the upper part of the heat exchange housing facing the smoke inlet chamber, and the top wall of the heat exchange housing is inclined upward from the smoke exhaust chamber to the smoke inlet chamber.

[0017] In one embodiment, the water receiving box is provided with a flow guide, which extends obliquely within the water receiving box and divides the inner cavity of the water receiving box into an interconnected water inlet cavity and a water outlet cavity. The water inlet is connected to the water inlet end of the water inlet cavity, and the water outlet is connected to the outlet end of the water outlet cavity.

[0018] In one embodiment, one end of the guide extends out of the water receiving box and toward the exhaust chamber to form a second guide portion, with the water inlet and the outlet located on the left and right sides of the second guide portion, respectively.

[0019] In one embodiment, the end of the second guide extending from the water receiving box is inclined away from the condenser heat exchanger, and the angle between the second guide and the horizontal plane is 30° to 45°; and / or,

[0020] The top of the second guide portion is not higher than the top height of the smoke outlet.

[0021] The second technical problem mentioned above is solved by the following technical solution:

[0022] A gas-fired water heater is provided, including the above-mentioned condensing heat exchange structure. The gas-fired water heater also includes a main housing and a heat exchanger. The gas-fired water heater further includes a main heat exchanger housing and a heat exchanger disposed within the main heat exchanger housing. The condensing heat exchange structure is disposed above the main heat exchanger housing.

[0023] Compared with the prior art, the gas-fired water heater of this utility model has the following advantages: The gas-fired water heater has the above-mentioned condensing heat exchange structure, which is set above the heat exchanger. On the one hand, it follows the flow direction of high-temperature flue gas, reducing heat loss; on the other hand, it makes full use of the vertical space of the gas-fired water heater, reducing the lateral dimensions and reducing the requirements for lateral installation space. The condensing heat exchange structure can heat the condensate discharged from the condensing heat exchange component through the heating element or atomize the condensate to generate water vapor through the atomizer. The exhaust flue gas and water vapor after heat exchange are discharged along the exhaust chamber, eliminating the need for a drainage structure to discharge condensate. This simplifies the overall structure of the gas-fired water heater and improves the user experience. Attached Figure Description

[0024] Figure 1 This is a front view of the condensation heat exchange structure provided in an embodiment of the present utility model;

[0025] Figure 2 A cross-sectional view of the condensation heat exchange structure provided in an embodiment of this utility model;

[0026] Figure 3 This is a partial structural disassembly diagram of the condensation heat exchange structure provided in an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the working process of the condensation heat exchange structure provided in the embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of a gas-fired water heater provided in an embodiment of the present invention.

[0029] Label Explanation:

[0030] 1. Shell; 11. Mounting port; 12. Smoke outlet; 13. Smoke inlet chamber; 14. Smoke outlet chamber; 15. Mounting base; 16. Heat exchange chamber; 2. Condensing heat exchanger; 21. Heat exchange shell; 211. Smoke inlet; 212. Bottom wall; 213. First side wall; 214. Second side wall; 215. Bending flange; 216. Top wall; 217. Smoke outlet; 221. Water inlet pipe; 222. Water outlet pipe; 3. Water receiving box; 311. Water inlet; 312. Discharge port; 313. Water inlet chamber; 314. Discharge chamber; 32. Heating element; 33. Flow guide; 332. Second guide section; 4. Smoke hood shell; 41. Smoke collection port; 42. Smoke outlet; 43. Smoke collection section; 44. Smoke exhaust section;

[0031] 100. Main heat exchanger shell; 200. Burner; 300. Fan; 400. Main unit shell;

[0032] 10. High-temperature flue gas; 20. Water vapor; 30. Emission flue gas. Detailed Implementation

[0033] 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.

[0034] In the description of this application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0035] 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. Thus, a feature defined as "first" and "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.

[0036] 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.

[0037] like Figures 1-4 As shown, this utility model embodiment first provides a condensing heat exchange structure, which is disposed above the main heat exchanger shell 100. The discharge end of the main heat exchanger shell 100 is used to discharge high-temperature flue gas 10, and the high-temperature flue gas 10 discharged from the main heat exchanger shell 100 can enter the condensing heat exchange structure.

[0038] The condensing heat exchange structure includes a shell 1, a condensing heat exchanger 2, and a water receiving box 3. The bottom of the shell 1 has an installation port 11. Inside the shell 1 are interconnected flue gas inlet chamber 13, heat exchange chamber 16, and flue gas exhaust chamber 14. The flue gas inlet chamber 13, heat exchange chamber 16, and flue gas exhaust chamber 14 are all located above the installation port 11, allowing the entire condensing heat exchange structure to be positioned above the main heat exchanger shell 100. This avoids the problem of a large lateral volume caused by horizontal parallel arrangements, reduces the requirement for lateral installation space, and is convenient to use. Furthermore, the vertical arrangement conforms to the flow trend of the high-temperature flue gas 10. The heat exchange chamber 16 houses the condensing heat exchanger 2, and the chamber wall of the heat exchange chamber 16 has a drain outlet. One side of the heat exchange chamber 16 is connected to the flue gas inlet chamber 13 via a flue gas inlet 211, and the other side of the heat exchange chamber 16 is connected to the flue gas exhaust chamber 14 via a flue gas outlet 217. The arrangement of the inlet chamber 13 and the exhaust chamber 14 ensures unidirectional flue gas flow. The high-temperature flue gas 10 discharged from the main heat exchanger shell 100 flows along the inlet chamber 13 and enters the heat exchange chamber 16 through the inlet port 211. The condenser heat exchanger 2 is used to exchange heat with the high-temperature flue gas 10 and generate condensate. A water collection box 3 is disposed inside the shell 1. The water collection box 3 has an inlet port 311 and an outlet port 312. The inlet port 311 is located below the outlet port and is used to collect the condensate flowing out of the outlet port; the outlet port 312 is connected to the exhaust chamber 14. A heating element 32 is provided inside the water collection box 3 to heat the condensate; or, an atomizer is provided inside the water collection box 3 to atomize the condensate. The exhaust gas 30 after heat exchange and the water vapor 20 generated by heating or atomizing condensate flow along the exhaust chamber 14 and are discharged. The exhaust gas 30 has a carrying effect on the water vapor 20, ensuring that all water vapor 20 can be discharged. There is no need to set up a drainage structure to discharge condensate, which helps to simplify the overall structure. At the same time, it avoids the sound of water droplets falling during the process of draining condensate, and avoids the impact of noise on the user experience.

[0039] For example, the heating element 32 can be an electric heating rod or a resistance wire, which is set at the bottom of the water receiving box 3 to heat the condensate in the water receiving box 3 to generate water vapor 20. The specific structure and atomization principle of the atomizer (not shown in the figure) can be set with reference to the prior art, and will not be described in detail here.

[0040] A heat exchange shell 21 is installed inside the shell 1. The cavity inside the heat exchange shell 21 is the heat exchange chamber 16. The flue gas inlet chamber 13 and the flue gas outlet chamber 14 are located on the left and right sides of the heat exchange chamber 16, respectively. This left-right arrangement achieves unidirectional gas flow. The heat exchange shell 21 isolates the flue gas outlet chamber 14 from the flue gas inlet chamber 13, preventing high-temperature flue gas 10 from directly entering the flue gas outlet chamber 14 without passing through the condenser heat exchanger 2. The water receiving box 3 is located below the heat exchange shell 21 and does not require a flow guide structure. Condensate enters the water receiving box 3 through the drain outlet. Cold water flows inside the condenser heat exchanger 2. The condenser heat exchanger 2 is equipped with a water inlet pipe 221 and a water outlet pipe 222. Figure 3 As shown. The inlet pipe 221 is connected to the water supply pipe, and the outlet pipe 222 can be connected to the main heat exchanger shell 100, so that the initially heated cold water can be reheated.

[0041] The condensing heat exchange structure also includes a smoke collection hood 4. The smoke collection hood 4 is inserted into the housing 1 through an installation port 11 and the installation port 11 is sealed. The smoke collection hood 4 is open at both ends, with one end being a smoke collection port 41 and the other end being a smoke exhaust port 42. The smoke collection port 41 is used to collect the flue gas, and the smoke exhaust port 42 is connected to the smoke inlet end of the smoke inlet chamber 13. The smoke collection hood 4 has a converging effect, guiding all the high-temperature flue gas 10 emitted from the main heat exchanger housing 100 into the smoke inlet chamber 13, reducing the diffusion of the high-temperature flue gas 10 in other spaces within the housing 1, and thus guiding as much of the high-temperature flue gas 10 in the smoke inlet chamber 13 as possible into the heat exchange chamber 16.

[0042] The smoke collection hood 4 is L-shaped and includes an interconnected smoke collection section 43 and a smoke exhaust section 44. Along the flow direction of the high-temperature flue gas 10, the smoke collection port 41, smoke collection section 43, smoke exhaust section 44, and smoke exhaust port 42 are arranged sequentially. The water collection box 3 is located above the smoke collection section 43, and the smoke exhaust section 44 extends into the smoke inlet end of the smoke inlet chamber 13. The L-shaped design gives the smoke collection hood 4 a flared structure, maximizing the opening area of ​​the smoke collection port 41 and the cross-sectional area of ​​the smoke collection section 43, thus guiding more high-temperature flue gas 10 into the smoke collection hood 4. The water collection box 3 is located above the smoke collection section 43, preventing interference between the water collection box 3 and the smoke collection hood 4 and optimizing the spatial arrangement.

[0043] For example, the smoke collection port 41 of the smoke collection hood 4 is fitted to the inner wall of the housing 1, so that the opening area of ​​the smoke collection port 41 is as large as possible, and the high-temperature flue gas 10 discharged from the main heat exchanger housing 100 is collected more effectively.

[0044] In one embodiment, the exhaust port 42 is also fitted to the wall of the inlet end of the smoke inlet chamber 13, reducing the gap between the high-temperature flue gas 10 entering the smoke collection hood 4 and the housing 1; the exhaust port 42 extends to the top of the water receiving box 3, further preventing the high-temperature flue gas 10 from entering the exhaust chamber 14 through the gap between the water receiving box 3 and the condenser heat exchanger 2.

[0045] In one embodiment, a drain outlet is provided on the side of the heat exchange shell 21 facing the flue gas chamber 14. The drain outlet extends to connect with the bottom of the heat exchange chamber 16. The bottom wall 212 of the heat exchange shell 21 is inclined from the flue gas chamber 13 to the flue gas chamber 14 towards the direction close to the water receiving box 3. The downwardly inclined bottom wall 212 facilitates the flow of condensate in the heat exchange shell 21 to the drain outlet, and avoids the accumulation of condensate in the heat exchange shell 21.

[0046] The flue gas outlet 217 is located on the side of the heat exchange shell 21 facing the flue gas chamber 14, which facilitates the rapid entry of the exhaust gas 30 after heat exchange into the flue gas chamber 14 through the flue gas outlet 217, resulting in good flow and avoiding blockage that could affect normal emissions.

[0047] In one embodiment, the drain outlet and the flue gas outlet 217 are the same outlet. The condensing heat exchanger 2 can discharge both the exhaust gas 30 and the condensate through the same flue gas outlet 217, simplifying the structure. Figure 4 As shown in the figure, the solid arrows indicate the flow direction of the high-temperature flue gas 10, the hollow arrows indicate the flow direction of the exhaust flue gas 30 after heat exchange, the dashed arrows indicate the flow direction of the condensate, and the dotted arrows indicate the flow direction of the water vapor 20.

[0048] The flue gas inlet 211 is located on the upper part of the heat exchange shell 21 facing the flue gas inlet chamber 13. The top wall 216 of the heat exchange shell 21 is inclined upwards from the exhaust chamber 14 to the flue gas inlet chamber 13. The flue gas inlet 211, located on the upper part of the heat exchange shell 21 facing the flue gas inlet chamber 13, extends the flow path of the flue gas in the flue gas inlet chamber 13, and the inclined top wall 216 better guides the flue gas into the condenser heat exchanger 2. The flue gas inlet 211 and the flue gas outlet 217 are arranged opposite each other on both sides of the heat exchange shell 21, and are located at the upper and lower parts respectively, which extends the flow path of the flue gas in the heat exchange chamber 16 and improves the heat exchange efficiency.

[0049] Regarding the specific structure of the heat exchange shell 21, in one embodiment, the heat exchange shell 21 further includes a first side wall 213 connected to the bottom wall 212 and a second side wall 214 connected to the top wall 216, with the second side wall 214 and the first side wall 213 arranged opposite to each other. A smoke exhaust chamber 14 is formed between the first side wall 213 and a portion of the shell 1, and a smoke inlet chamber 13 is formed between the second side wall 214 and a portion of the shell 1. The bottom wall 212 and the first side wall 213 are integrally formed, and the second side wall 214 and the top wall 216 are integrally formed, together enclosing the heat exchange chamber 16, simplifying the processing of the heat exchange shell 21.

[0050] Both the inlet 311 and the outlet 312 are connected to the flue gas chamber 14. Along the left and right direction, the outlet 312 is located to the right of the inlet 311. The condensate water inlet and the water vapor 20 outlet will not affect each other.

[0051] In one embodiment, the bottom wall 212 has a bent flange 215 on the edge away from the second side wall 214. The bent flange 215 is inserted into the water inlet 311 and abuts against the wall of the water inlet 311. The bent flange 215 guides the condensate while preventing the flue gas from flowing back into the flue gas chamber 13.

[0052] The water receiving box 3 is equipped with a guide member 33, which extends obliquely within the water receiving box 3 and divides the inner cavity of the water receiving box 3 into an interconnected water inlet chamber 313 and an outlet chamber 314. The water inlet 311 is connected to the water inlet end of the water inlet chamber 313, and the outlet 312 is connected to the outlet end of the outlet chamber 314. The heating element 32 or the atomizer is located at the bottom of the water inlet chamber 313 or the bottom of the outlet chamber 314. The water inlet chamber 313 and the outlet chamber 314 are interconnected and have unidirectional flow, which facilitates the smooth flow of water vapor 20. The obliquely extending guide member 33 within the water receiving box 3 can guide condensate water, preventing condensate water from dripping directly into the water receiving box 3 and causing noise or water droplets splashing outside the water receiving box 3.

[0053] In one embodiment, one end of the guide member 33 extends out of the water receiving box 3 and into the exhaust chamber 14 to form a second guide portion 332. The water inlet 311 and the outlet 312 are located on the left and right sides of the second guide portion 332, respectively. The second guide portion 332 is used to guide the exhaust gas 30 after heat exchange. The second guide portion 332 forms a certain obstruction to prevent the exhaust gas 30 from hindering the rise of the water vapor 20. The exhaust gas 30 and the water vapor 20 mix and rise simultaneously in the exhaust chamber 14. The exhaust gas 30 has a carrying and guiding effect on the water vapor 20.

[0054] The end of the second guide portion 332 extending out of the water receiving box 3 is inclined away from the condenser heat exchanger 2 to reduce the resistance to the exhaust gas 30. In one embodiment, the angle between the second guide portion 332 and the horizontal plane is 30° to 45°. Exemplarily, the angle between the second guide portion 332 and the horizontal plane includes, but is not limited to, 30°, 32°, 35°, 36°, 40°, 42°, 45°, and any other angle value between 30° and 45°.

[0055] In one embodiment, the top of the second guide 332 is not higher than the top of the smoke outlet 217. This is to minimize the emission resistance formed by the second guide 332 and to facilitate the mixing and simultaneous rise of the exhaust gas 30 and water vapor 20 in the exhaust chamber 14.

[0056] The present invention also provides a gas-fired water heating device, such as... Figure 5As shown, the gas-fired water heater includes the condensing heat exchange structure described above. The gas-fired water heater also includes a main heat exchanger shell 100 and a heat exchanger disposed within the main heat exchanger shell 100. The condensing heat exchange structure is positioned above the main heat exchanger shell 100, and the main heat exchanger shell 100 has a connecting port that communicates with the condensing heat exchange structure. This vertical arrangement avoids the problem of a large lateral volume caused by horizontal parallel arrangements, fully utilizing the vertical space of the gas-fired water heater and avoiding increasing the horizontal cross-sectional dimensions. Furthermore, the vertical arrangement better conforms to the flow trend of the high-temperature flue gas 10, following its flow direction and reducing heat loss. The arrangement of the flue gas inlet chamber 13, heat exchange chamber 16, and exhaust chamber 14 of the condensing heat exchange structure ensures unidirectional flue gas flow. The high-temperature flue gas 10 discharged from the main heat exchanger shell 100 flows into the flue gas inlet chamber 13 through the smoke collection hood 4 and enters the heat exchange chamber 16 through the inlet 211. The condensing heat exchanger 2 is used to exchange heat with the high-temperature flue gas 10 and generate condensate. A water collection box 3 is installed inside the housing 1. The water collection box 3 has an inlet 311 and an outlet 312. The inlet 311 is located below the outlet and is used to collect the condensate flowing out of the outlet. The outlet 312 is connected to the flue gas chamber 14. The water vapor 20 generated by heating or atomizing the condensate enters the flue gas chamber 14 through the outlet 312, flows together with the exhaust gas 30 after heat exchange, and is discharged. The exhaust gas 30 has a carrying effect on the water vapor 20, ensuring that all the water vapor 20 can be discharged. At the same time, it avoids the dripping sound that may be formed during the drainage of condensate. There is no need to set up a drainage structure to discharge condensate, which simplifies the overall structure of the gas water heater and improves the user experience.

[0057] In one embodiment, the housing 1 is connected to the main heat exchanger housing 100 via a mounting base 15. The gas-fired water heater is a forced-draft type water heater, with the burner 200 positioned below the main heat exchanger housing 100 and the fan 300 positioned below the burner 200. The fan 300 blows the high-temperature flue gas 10 generated by the burner 200 through the main heat exchanger housing 100 and the condensing heat exchange structure in sequence.

[0058] In one embodiment, the flue gas outlet 12 is located at the top of the housing 1, which is more in line with the flue gas flow direction. The gas-fired water heater also includes a main housing 400, a condensing heat exchange structure is located at the top inside the main housing 400, and the main housing 400 has a connecting port, through which the flue gas outlet 12 is connected.

[0059] 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.

[0060] 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 condensation heat exchange structure, characterized in that, include: The housing (1) has an installation port (11) at its bottom. The housing (1) has a flue gas inlet chamber (13), a heat exchange chamber (16), and a flue gas outlet chamber (14) that are interconnected. The flue gas inlet chamber (13), the heat exchange chamber (16), and the flue gas outlet chamber (14) are all located above the installation port (11). The heat exchange chamber (16) is equipped with a condenser heat exchanger (2), and the cavity wall of the heat exchange chamber (16) is provided with a drain outlet. One side of the heat exchange chamber (16) is connected to the flue gas inlet chamber (13) through a flue gas inlet (211), and the other side of the heat exchange chamber (16) is connected to the flue gas outlet chamber (14) through a flue gas outlet (217). A water receiving box (3) is disposed inside the housing (1). The water receiving box (3) has an inlet (311) and an outlet (312). The inlet (311) is located below the outlet and is used to receive condensate flowing out of the outlet. The outlet (312) is connected to the exhaust chamber (14). The water receiving box (3) is provided with a heating element (32) for heating the condensate; or, the water receiving box (3) is provided with an atomizer for atomizing the condensate.

2. The condensing heat exchange structure according to claim 1, wherein The housing (1) is provided with a heat exchange housing (21), the cavity of the heat exchange housing (21) is the heat exchange chamber (16), the smoke inlet chamber (13) and the smoke outlet chamber (14) are located on the left and right sides of the heat exchange chamber (16) respectively, and the water receiving box (3) is located below the heat exchange housing (21).

3. The condensing heat exchange structure according to claim 2, wherein The condensation heat exchange structure also includes a smoke collection hood (4), which is inserted into the housing (1) through the installation port (11) and the installation port (11) is sealed. The smoke collection hood (4) is open at both ends, with one end being a smoke collection port (41) and the other end being a smoke exhaust port (42). The smoke exhaust port (42) is connected to the smoke inlet end of the smoke inlet chamber (13).

4. The condensation heat exchange structure according to claim 3, characterized in that, The smoke collection hood (4) is L-shaped and includes a smoke collection section (43) and a smoke exhaust section (44) that are connected to each other. Along the flow direction of the high-temperature flue gas (10), the smoke collection port (41), the smoke collection section (43), the smoke exhaust section (44) and the smoke exhaust port (42) are arranged in sequence. The water receiving box (3) is located above the smoke collection section (43) and the smoke exhaust section (44) extends into the smoke inlet end of the smoke inlet chamber (13).

5. The condensation heat exchange structure according to claim 2, characterized in that, The drain outlet is located on the side of the heat exchange shell (21) facing the flue gas chamber (14), and extends to connect with the bottom of the heat exchange chamber (16). The bottom wall (212) of the heat exchange shell (21) is inclined towards the water receiving box (3) from the flue gas inlet chamber (13) to the flue gas outlet chamber (14); and / or, The smoke outlet (217) is located on the side of the heat exchange shell (21) facing the smoke exhaust chamber (14); the drain outlet and the smoke outlet (217) are the same outlet.

6. The condensation heat exchange structure according to claim 3, characterized in that, The smoke inlet (211) is located on the upper part of the heat exchange shell (21) facing the smoke inlet chamber (13), and the top wall (216) of the heat exchange shell (21) is inclined upward from the smoke exhaust chamber (14) to the smoke inlet chamber (13).

7. The condensation heat exchange structure according to claim 6, characterized in that, The water receiving box (3) is provided with a guide (33), which extends obliquely inside the water receiving box (3) and divides the inner cavity of the water receiving box (3) into an inlet cavity (313) and an outlet cavity (314) that are interconnected. The inlet (311) is connected to the inlet end of the inlet cavity (313), and the outlet (312) is connected to the outlet end of the outlet cavity (314).

8. The condensing heat exchange structure according to claim 7, wherein One end of the guide member (33) extends out of the water receiving box (3) and into the exhaust chamber (14) to form a second guide section (332). The water inlet (311) and the discharge port (312) are located on the left and right sides of the second guide section (332), respectively.

9. The condensation heat exchange structure according to claim 8, characterized in that, The second guide portion (332) extends out of the water receiving box (3) and is inclined away from the condenser heat exchanger (2), with the angle between the second guide portion (332) and the horizontal plane being 30° to 45°; and / or, The top of the second guide (332) is not higher than the top height of the smoke outlet (217).

10. Gas water heating apparatus characterised in that, Including the condensing heat exchange structure as described in any one of claims 1-9, the gas-fired hot water device further includes a main heat exchanger housing (100) and a heat exchanger disposed within the main heat exchanger housing (100), wherein the condensing heat exchange structure is disposed above the main heat exchanger housing (100).

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