Condensing heat exchanger and gas water heater

Abstract

The utility model relates to gas water heater technical field discloses a kind of condensing heat exchanger and gas water heater, condensing heat exchanger includes shell, heat exchange pipeline, water-absorbing part and heating module, first chamber and second chamber are formed in shell and are separated;Heat exchange pipeline is located in first chamber, condensate water can enter second chamber from first chamber;Water-absorbing part is located in second chamber, for absorbing the condensate water in second chamber;Heating module is located in second chamber, and contact with water-absorbing part, for heating drying water-absorbing part.Second chamber condensate water can be directly absorbed by water-absorbing part, without again setting pipeline recovery or condensate water is discharged outside, can reduce the number of pipeline interface, simplify waterway system connection structure, reduce the risk of water leakage.Heating module can make water-absorbing part restore water absorption capacity, without frequently replacing water-absorbing part, reduce maintenance difficulty.Water-absorbing part, heating module and condensing heat exchanger are integrated, can save installation space, simplify assembly process, improve assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gas water heater technology, and in particular to a condensing heat exchanger and a gas water heater. Background Technology

[0002] Condensing gas water heaters can perform two heat exchanges—one through the main heat exchanger and the other through the condensing heat exchanger—effectively recovering the latent heat from the flue gas and improving thermal efficiency. However, during the secondary heat exchange process, water vapor in the flue gas condenses to produce condensate. Furthermore, because the flue gas contains elements such as sulfur and nitrogen, the resulting condensate is usually acidic and cannot be directly discharged.

[0003] To address the aforementioned issues, the current conventional approach involves connecting a separate condensate collection container externally to the condensing heat exchanger and integrating a condensate purification device in series or as part of the system to collect and purify the condensate. However, this solution has the following drawbacks: the collection container and purification device require additional internal or external installation space within the gas water heater, hindering the miniaturization of the entire unit. Furthermore, the external collection container and purification device increase water connection points, raising the risk of leaks and complicating assembly, thus reducing the reliability of the water system. Additionally, the filter or neutralizing material in the purification device is a consumable, requiring regular replacement or replenishment, resulting in cumbersome maintenance procedures.

[0004] Therefore, there is an urgent need for a condensing heat exchanger and a gas water heater to solve the above problems. Utility Model Content

[0005] Based on the above problems, the purpose of this utility model is to provide a condensing heat exchanger and a gas water heater that can achieve zero discharge of condensate, simplify the water system connection structure of the gas water heater, reduce the risk of leakage, save installation space, improve the assembly efficiency and reliability of the gas water heater, and reduce maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] On the one hand, a condensing heat exchanger is provided, comprising:

[0008] A housing, wherein a first chamber and a second chamber are arranged vertically and are interconnected within the housing;

[0009] A heat exchange pipeline is installed in the first chamber, and the condensate generated during the heat exchange process of the heat exchange pipeline can enter the second chamber from the first chamber.

[0010] A water-absorbing element is disposed in the second chamber, and the water-absorbing element is used to absorb the condensate in the second chamber;

[0011] A heating module is disposed in the second chamber and in contact with the water-absorbing element. The heating module is used to heat and dry the water-absorbing element.

[0012] As an optional solution for the condenser heat exchanger of this utility model, the heating module includes a heating plate disposed in the second chamber, the heating plate dividing the second chamber into an upper and lower accommodating cavity and a heat dissipation cavity, and the water absorption element is located in the accommodating cavity.

[0013] As an optional embodiment of the condenser heat exchanger of this utility model, the heat exchange pipeline is provided with an inlet pipe section and an outlet pipe section, and the bottom of the shell is provided with a heat exchange inlet connector and a heat exchange outlet connector. The inlet pipe section passes through the heating plate and is connected to the heat exchange inlet connector, and the outlet pipe section passes through the heating plate and is connected to the heat exchange outlet connector.

[0014] As an optional embodiment of the condenser heat exchanger of this utility model, the heating plate is provided with a first perforation at the position corresponding to the water inlet pipe section and the water outlet pipe section. The water inlet pipe section and the water outlet pipe section pass through the corresponding first perforation. A first water-stopping element is provided between the water inlet pipe section and the water outlet pipe section and the hole wall of the corresponding first perforation.

[0015] As an optional embodiment of the condenser heat exchanger of this utility model, a partition is provided inside the shell, which divides the shell into a first chamber and a second chamber. The partition is provided with a plurality of water-permeable holes, and the first chamber and the second chamber are connected through the plurality of water-permeable holes.

[0016] As an optional embodiment of the condenser heat exchanger of this utility model, the housing includes a detachably connected upper cover and a lower cover, and the partition is sandwiched between the upper cover and the lower cover and is sealed to the upper cover and / or the lower cover.

[0017] As an optional solution for the condensing heat exchanger of this utility model, the upper cover is provided with a first connecting part along the circumference at one end facing the lower cover, the lower cover is provided with a second connecting part along the circumference at one end facing the upper cover, and a third connecting part is provided around the outer periphery of the partition. The third connecting part is sandwiched between the first connecting part and the second connecting part and is detachably fixedly connected to both the first connecting part and the second connecting part.

[0018] As an optional solution for the condenser heat exchanger of this utility model, the outer periphery of the partition is provided with a surrounding edge structure, the upper cover is sleeved outside the surrounding edge structure, and the third connecting part is arranged around the surrounding edge structure.

[0019] As an optional solution for the condensing heat exchanger of this utility model, a sealing groove is provided on the side of the third connecting part facing the first connecting part, and a sealing element is provided in the sealing groove, and the sealing element can make sealing contact with the first connecting part.

[0020] And / or, the third connecting part is provided with an overlapping groove on the side opposite to the first connecting part, and the edge of the opening of the lower cover can fit into the overlapping groove.

[0021] On the other hand, a gas water heater is provided, including a main heat exchanger and a condensing heat exchanger as described above, wherein the heat exchange outlet of the condensing heat exchanger is connected to the water inlet of the main heat exchanger, and the flue gas outlet of the main heat exchanger is connected to the air inlet of the condensing heat exchanger.

[0022] The beneficial effects of this utility model are as follows:

[0023] The condensing heat exchanger and gas water heater provided by this utility model involve heat exchange and condensation in the first chamber of the condensing heat exchanger during operation. The condensate automatically flows into the second chamber below the first chamber under gravity. Because the second chamber is equipped with a water suction device, the condensate entering the second chamber can be directly absorbed. Therefore, there is no need for piped condensate recovery or external drainage, achieving zero condensate discharge. This also reduces the number of pipe connections, simplifies the water system connection structure of the gas water heater, reduces the risk of leakage, and improves the reliability of the gas water heater. Furthermore, this design solves the problem of condensate drainage during gas water heater installation, reducing installation difficulty, improving installation efficiency, and enhancing the applicability of the gas water heater.

[0024] By installing a heating module in the second chamber to heat and dry the water-absorbing component, the component can regain its water-absorbing capacity, enabling its reuse and reducing the need for frequent replacement. This lowers the difficulty and cost of maintenance for users. Furthermore, integrating the water-absorbing component and heating module with the condenser heat exchanger fully utilizes the internal space of the condenser heat exchanger shell, reducing the number of parts required for gas water heater assembly. This simplifies the assembly process and improves production and assembly efficiency. Moreover, this integrated design does not occupy additional internal or external installation space in the gas water heater, facilitating miniaturization and meeting diverse design requirements. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a gas water heater provided in a specific embodiment of this utility model;

[0027] Figure 2 This is a first schematic diagram of a condenser heat exchanger provided in a specific embodiment of this utility model;

[0028] Figure 3 This is a second schematic diagram of the condenser heat exchanger provided in a specific embodiment of this utility model;

[0029] Figure 4 This is a cross-sectional view of the condenser heat exchanger provided in a specific embodiment of this utility model;

[0030] Figure 5 yes Figure 4 A partial view.

[0031] In the picture:

[0032] 1. Shell; 2. Heat exchange piping; 3. Water suction component; 4. Heating plate; 5. Baffle plate; 6. Heat exchange water inlet connector; 7. Heat exchange water outlet connector; 8. Flue pipe;

[0033] 101. First chamber; 102. Second chamber; 1021. Receiving cavity; 1022. Heat dissipation cavity;

[0034] 11. Upper cover; 12. Lower cover;

[0035] 111, First connecting part; 1111, Abutting protrusion; 112, Air inlet; 113, Exhaust outlet; 1131, Valve plate;

[0036] 121. Second connecting part; 1211. First connecting ear;

[0037] 21. Inlet pipe section; 22. Outlet pipe section;

[0038] 41. First perforation; 42. First water-stopping component;

[0039] 51. Water-permeable hole; 52. Third connecting part; 53. Surrounding structure; 54. Second perforation; 55. Second water-stopping component;

[0040] 521. Sealing groove; 522. Sealing element; 523. Overlap groove; 524. Second connecting lug;

[0041] 10. Condensing heat exchanger; 20. Main heat exchanger; 30. Inlet pipe; 40. Outlet pipe; 50. Housing; 60. Fan; 70. Burner;

[0042] 501. Water inlet; 502. Water outlet; 503. Gas inlet. Detailed Implementation

[0043] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] like Figures 1 to 5 As shown, this embodiment provides a condensing heat exchanger 10, which simplifies the water system connection structure of a gas water heater, reduces the risk of leakage, and improves the assembly efficiency of the gas water heater. The condensing heat exchanger 10 includes a shell 1, heat exchange pipes 2, a water suction element 3, and a heating module.

[0047] Among them, see Figure 1 , Figure 2 and Figure 4The housing 1 is divided into a first chamber 101 and a second chamber 102 arranged vertically and connected to each other. The heat exchange pipe 2 is disposed in the first chamber 101, and the condensate generated during the heat exchange process of the heat exchange pipe 2 can enter the second chamber 102 from the first chamber 101. The water absorption element 3 is disposed in the second chamber 102 and is used to absorb the condensate in the second chamber 102. The heating module is disposed in the second chamber 102 and is in contact with the water absorption element 3. The heating module is used to heat and dry the water absorption element 3.

[0048] The condenser heat exchanger 10 provided in this embodiment allows for heat exchange and condensation in the first chamber 101 of the gas water heater during operation. The condensate automatically flows into the second chamber 102 below the first chamber 101 under gravity. Because the second chamber 102 is equipped with a water suction element 3, the condensate entering the second chamber 102 can be directly absorbed. Therefore, there is no need to install pipes for condensate recovery or external discharge, achieving zero condensate discharge. This also reduces the number of pipe connections, simplifies the water system connection structure of the gas water heater, reduces the risk of leakage, and improves the reliability of the gas water heater. Furthermore, this design solves the problem of condensate drainage during gas water heater installation, reducing installation difficulty, improving installation efficiency, and enhancing the applicability of the gas water heater.

[0049] By heating and drying the water-absorbing component 3 within the second chamber 102 using a heating module, the component 3 can regain its water-absorbing capacity, enabling its reuse and reducing the need for frequent replacement. This lowers the difficulty and cost of maintenance for users. Furthermore, integrating the water-absorbing component 3 and the heating module with the condenser heat exchanger 10 fully utilizes the internal space of the condenser heat exchanger 10 shell 1, reducing the number of parts required for gas water heater assembly. This simplifies the assembly process and improves production and assembly efficiency. Moreover, this integrated design avoids occupying additional internal or external installation space in the gas water heater, facilitating miniaturization and meeting diverse design requirements.

[0050] See 3 and Figure 4 The housing 1 is provided with an exhaust port 113. During the process of heating and drying the water-absorbing component 3 by the heating module, the evaporated moisture is discharged from the exhaust port 113. Furthermore, an exhaust pipe 8 is provided at the exhaust port 113, through which the flue gas after heat exchange in the first chamber 101 is discharged. A valve plate 1131 is also provided at the exhaust port 113. The valve plate 1131 can prevent backflow of flue gas, which would lead to incomplete combustion. At the same time, when the gas water heater is turned off, the valve plate 1131 can block the exhaust port 113, reducing heat loss and cold air intrusion, as well as preventing foreign objects from entering the housing 1.

[0051] Optionally, the absorbent component 3 may include a desiccant. For example, silica gel, molecular sieves, glass fiber cotton, etc., as long as they can meet the requirements of water absorption and drying for repeated use.

[0052] Optionally, see Figure 2 , Figure 3 and Figure 4 The heating module includes a heating plate 4 disposed within a second chamber 102. The heating plate 4 divides the second chamber 102 into a vertically arranged receiving cavity 1021 and a heat dissipation cavity 1022. The water-absorbing component 3 is located within the receiving cavity 1021. That is, the heating plate 4 is suspended within the second chamber 102, and the water-absorbing component 3 is located on the heating plate 4. The heating plate 4 provides a supporting foundation for the water-absorbing component 3, eliminating the need for separate fixing of the water-absorbing component 3. Furthermore, the heating plate 4 is designed to maintain a distance from the bottom of the housing 1, i.e., a heat dissipation cavity 1022 is reserved below the heating plate 4. This allows the heat generated during the heating and drying process by the heating plate 4 to form hot air convection through the heat dissipation cavity 1022, preventing localized overheating and improving heating and drying efficiency.

[0053] For example, the heating plate 4 can be a PTC ceramic heating plate or a metal electric heating plate (such as a stainless steel plate / aluminum alloy plate), as long as it can meet the heating and drying requirements.

[0054] The heating plate 4 can be set to activate at regular intervals to dry the water-absorbing component 3. Alternatively, the water-absorbing component 3 can be tested for humidity to determine whether it has reached the set water absorption limit, thereby controlling the heating plate 4 to activate and dry the water-absorbing component 3.

[0055] Optionally, the heating module also includes a controller electrically connected to the heating plate 4, which controls the opening and closing of the heating plate 4 and adjusts the heating temperature and working time of the heating plate 4.

[0056] See Figure 3 , Figure 4 and Figure 5 The heat exchange pipeline 2 is equipped with an inlet pipe section 21 and an outlet pipe section 22. The bottom of the shell 1 is equipped with a heat exchange inlet connector 6 and a heat exchange outlet connector 7. The inlet pipe section 21 passes through the heating plate 4 and connects to the heat exchange inlet connector 6, while the outlet pipe section 22 passes through the heating plate 4 and connects to the heat exchange outlet connector 7. Figure 1 The heat exchange inlet connector 6 is used to connect to the inlet pipe 30 of the gas water heater, and the heat exchange outlet connector 7 is connected to the inlet of the main heat exchanger 20 of the gas water heater through a pipeline. The cold water in the inlet pipe 30 enters the heat exchange pipeline 2 through the inlet pipe section 21. The heat exchange pipeline 2 exchanges heat with the medium-temperature flue gas in the first chamber 101. The water after heat exchange is then transported to the main heat exchanger 20 through the outlet pipe section 22 and the pipeline connected to the heat exchange outlet connector 7.

[0057] In this embodiment, the heat exchange pipe 2 is spirally coiled, which increases the contact area with the medium-temperature flue gas and improves the heat exchange efficiency. Both the inlet pipe section 21 and the outlet pipe section 22 are designed to extend vertically, penetrating the heating plate 4 vertically. This structural design is beneficial for the water inlet and outlet of the heat exchange pipe 2; on the other hand, the heat exchange inlet connector 6 and the heat exchange outlet connector 7 can be arranged at the bottom of the shell 1, making full use of the space below the shell 1 and resulting in a more reasonable layout.

[0058] Of course, in other embodiments, the inlet pipe section 21 and the outlet pipe section 22 can also be designed to extend from one side of the housing 1, and can be adapted according to actual needs, without being limited to the arrangement methods listed above.

[0059] See Figure 5 The heating plate 4 has first through holes 41 at the positions of the corresponding inlet pipe section 21 and outlet pipe section 22. The inlet pipe section 21 and outlet pipe section 22 pass through the corresponding first through holes 41. A first water-stopping element 42 is provided between the inlet pipe section 21 and outlet pipe section 22 and the wall of the corresponding first through hole 41. The first water-stopping element 42 can prevent condensate from flowing directly along the pipe wall of the inlet pipe section 21 (outlet pipe section 22) to the heat dissipation cavity 1022, ensuring that the condensate can be absorbed and treated by the water absorption element 3, and avoiding the accumulation of condensate in the heat dissipation cavity 1022.

[0060] For example, the first water-stopping element 42 may be a rubber sealing ring, which is sleeved outside the water inlet pipe section 21 (water outlet pipe section 22) and makes sealing contact with the hole wall of the first through hole 41.

[0061] See Figure 4 and Figure 5 The housing 1 is equipped with a partition 5, which divides the housing 1 into a first chamber 101 and a second chamber 102. The partition 5 has multiple water-permeable holes 51, which connect the first chamber 101 and the second chamber 102. That is, condensate formed in the first chamber 101 enters the second chamber 102 through the multiple water-permeable holes 51. This requires no additional power or complex piping, resulting in a simple and easy-to-implement structure. Steam generated by the heating module heating and drying the water-absorbing component 3 can move upwards through the multiple water-permeable holes 51 and be discharged through the exhaust port 113.

[0062] By setting a partition 5 to divide the interior of the shell 1 into a first chamber 101 and a second chamber 102, the internal space of the shell 1 can be fully utilized to achieve an integrated design of the water absorption component 3, the heating module and the condenser heat exchanger 10. At the same time, the partition 5 makes the first chamber 101 and the second chamber 102 independent of each other, so that the heat exchange process of the heat exchange pipeline 2 and the absorption and treatment process of condensate by the water absorption component 3 do not interfere with each other.

[0063] Optionally, the multiple water-permeable holes 51 on the partition 5 can be evenly arranged so that the condensate generated in each position in the first chamber 101 can smoothly enter the second chamber 102, thus avoiding water accumulation in the first chamber 101.

[0064] See Figure 4 and Figure 5 The partition plate 5 has second perforations 54 at the positions corresponding to the inlet pipe section 21 and the outlet pipe section 22. The inlet pipe section 21 and the outlet pipe section 22 pass through the corresponding second perforations 54. A second water-stopping element 55 is provided between the inlet pipe section 21 and the outlet pipe section 22 and the wall of the corresponding second perforation 54. The presence of the second water-stopping element 55 can further prevent condensate from flowing directly down the pipe wall of the inlet pipe section 21 (outlet pipe section 22), reducing the risk of water leakage at the first perforation 41 of the heating plate 4.

[0065] For example, the second water-stopping element 55 may be a rubber sealing ring, which is sleeved outside the water inlet pipe section 21 (water outlet pipe section 22) and makes sealing contact with the hole wall of the second through hole 54.

[0066] See Figure 3 and Figure 4 The housing 1 includes a detachably connected upper cover 11 and a lower cover 12. A partition 5 is sandwiched between the upper cover 11 and the lower cover 12 and is sealed to the upper cover 11 and / or the lower cover 12. The detachable connection of the upper cover 11, the lower cover 12, and the partition 5 facilitates later disassembly, replacement, or cleaning of the partition 5, as well as maintenance of components (such as the water suction element 3 and the heat exchange pipes 2) in the first chamber 101 and the second chamber 102, reducing maintenance difficulty. Furthermore, by directly integrating the partition 5 between the upper cover 11 and the lower cover 12, no additional fixing structure is required to secure the partition 5, thus reducing redundant structures and making the overall design more compact.

[0067] By sealing the partition 5 with the upper cover 11 and / or the lower cover 12, condensate can be prevented from leaking through the connection gap, making the condensate flow path controllable and ensuring that condensate can only flow from the first chamber 101 to the second chamber 102, so that the condensate can be completely absorbed by the absorbent 3.

[0068] See Figure 3 , Figure 4 and Figure 5The upper cover 11 has a first connecting portion 111 circumferentially arranged at one end facing the lower cover 12, and the lower cover 12 has a second connecting portion 121 circumferentially arranged at one end facing the upper cover 11. A third connecting portion 52 is circumferentially arranged around the outer periphery of the partition 5, sandwiched between the first connecting portion 111 and the second connecting portion 121, and detachably fixedly connected to both. When assembling the upper cover 11, partition 5, and lower cover 12, the partition 5 is placed between the upper cover 11 and lower cover 12, aligning the first connecting portion 111, the second connecting portion 121, and the third connecting portion 52 accordingly, and then tightened. The three connecting portions facilitate the positioning and assembly of the upper cover 11, partition 5, and lower cover 12, reducing manual adjustment time and improving assembly efficiency.

[0069] Optionally, the upper cover 11, the partition 5, and the lower cover 12 are fixedly connected by fasteners. The first connecting part 111 is a flange structure circumferentially disposed at the opening of the upper cover 11. The second connecting part 121 includes a plurality of first connecting ears 1211, which are circumferentially spaced at the opening of the lower cover 12. The third connecting part 52 is circumferentially spaced with second connecting ears 524 corresponding to the plurality of first connecting ears 1211. Fasteners are sequentially passed through the connecting flange structure, the first connecting ears 1211, and the corresponding second connecting ears 524 to realize a detachable connection between the upper cover 11, the partition 5, and the lower cover 12.

[0070] For example, the fasteners can be screws, bolts, etc., which are easy to assemble and disassemble and ensure the stability of the structural connection. Of course, in other embodiments, the upper cover 11, the partition 5, and the lower cover 12 can also be connected by a snap-fit ​​structure to achieve a detachable connection.

[0071] Optionally, see Figure 4 and Figure 5 A sealing groove 521 is provided on the side of the third connecting part 52 facing the first connecting part 111, and a sealing element 522 is provided in the sealing groove 521. The sealing element 522 can make sealing contact with the first connecting part 111. That is, the third connecting part 52 and the first connecting part 111 are sealed together by a sealing element 522 to prevent condensate from the first chamber 101 from leaking from the connection gap between the partition 5 and the upper cover 11.

[0072] Optionally, the first connecting part 111 is a flanged structure arranged circumferentially, and the sealing groove 521 is an annular groove arranged around the third connecting part 52. After the first connecting part 111 and the third connecting part 52 are fixedly connected, the first connecting part 111 can uniformly press the sealing element 522 in the circumferential direction, so that the third connecting part 52 and the first connecting part 111 have uniform sealing contact in the circumferential direction, resulting in a good sealing effect and more balanced force. The sealing element 522 is exemplarily an O-ring or a rectangular sealing ring.

[0073] Optionally, see Figure 5 The first connecting portion 111 is provided with an abutting protrusion 1111 protruding towards the sealing groove 521. After the first connecting portion 111 overlaps with the third connecting portion 52, the abutting protrusion 1111 can just press against the sealing member 522, so that the sealing member 522 is pressed between the first connecting portion 111 and the third connecting portion 52, ensuring the sealing effect. For example, the first connecting portion 111 can be bent in an integral bending manner to form the above-mentioned abutting protrusion 1111.

[0074] See Figure 4 and Figure 5 The partition 5 has a surrounding edge structure 53 around its outer perimeter. The upper cover 11 is fitted over the surrounding edge structure 53, and the third connecting part 52 is also surrounding the surrounding edge structure 53. The surrounding edge structure 53 increases the contact area between the upper cover 11 and the partition 5, improving connection stability. Simultaneously, the surrounding edge structure 53 serves as a positioning reference, facilitating quick alignment and installation of the upper cover 11 and the partition 5, thus improving assembly efficiency.

[0075] And / or, the third connecting part 52 is provided with an overlapping groove 523 on the side facing away from the first connecting part 111, and the edge of the opening of the lower cover 12 can fit into the overlapping groove 523. That is, the partition 5 is at least partially embedded in the lower cover 12, so that the lower cover 12 and the third connecting part 52 can fit tightly, reducing the risk of loosening and enhancing the overall structural stability. At the same time, the edge of the lower cover 12 can form a surface contact after being embedded in the overlapping groove 523, reducing the risk of condensate overflow. In addition, the overlapping groove 523 can also provide a positioning reference for the assembly of the partition 5 and the lower cover 12, ensuring quick alignment during assembly, avoiding misalignment or tilting, and improving assembly consistency.

[0076] In some embodiments, a seal 522 may be provided between the partition 5 and the lower cover 12 to seal the partition 5 and the lower cover 12. For example, a sealing ring may be added or sealant may be applied in the overlap groove 523 to further improve the water-proof effect.

[0077] This embodiment also provides a gas water heater, including a main heat exchanger 20 and a condensing heat exchanger 10 as described above. The heat exchange outlet of the condensing heat exchanger 10 is connected to the water inlet of the main heat exchanger 20, and the flue gas outlet of the main heat exchanger 20 is connected to the air inlet 112 of the condensing heat exchanger 10.

[0078] The condensate generated in the first chamber 101 of the condenser heat exchanger 10 enters the second chamber 102 and is directly absorbed by the suction element 3. This eliminates the need for additional piping for condensate recovery or external discharge, achieving zero condensate discharge. Furthermore, it reduces the number of pipe connections, simplifies the water system connection structure of the gas water heater, lowers the risk of leakage, and improves the reliability of the gas water heater. Simultaneously, this design also solves the problem of condensate drainage during gas water heater installation, reducing installation difficulty, improving installation efficiency, and enhancing the applicability of the gas water heater.

[0079] By installing a heating module in the second chamber 102 to heat and dry the water-absorbing component 3, the water-absorbing component 3 can regain its water-absorbing capacity, enabling its reuse without frequent replacement and reducing the difficulty and cost of maintenance for users. Furthermore, integrating the water-absorbing component 3 and the heating module with the condenser heat exchanger 10 fully utilizes the internal space of the condenser heat exchanger 10 shell 1, reducing the number of parts required for gas water heater assembly, thus simplifying the assembly process and improving product production and assembly efficiency. This integrated design of the water-absorbing component 3 and the heating module with the condenser heat exchanger 10 does not occupy additional internal or external installation space in the gas water heater, facilitating miniaturization and meeting diverse design needs.

[0080] See Figure 1 , Figure 3 and Figure 4 The gas water heater also includes a housing 50, an inlet pipe 30, an outlet pipe 40, a fan 60, and a burner 70. The condensing heat exchanger 10, the main heat exchanger 20, the fan 60, and the burner 70 are all located inside the housing 50. The housing 50 is also equipped with an inlet port 501, an outlet port 502, and a gas port 503. One end of the inlet pipe 30 is connected to the inlet port 501, and the other end is connected to the heat exchange inlet connector 6 of the condensing heat exchanger 10. One end of the outlet pipe 40 is connected to the outlet port 502, and the other end is connected to the outlet of the main heat exchanger 20. The inlet of the main heat exchanger 20 is connected to the heat exchange outlet connector 7 (heat exchange outlet) of the condensing heat exchanger 10. The air inlet of the fan 60 is connected to the exhaust port of the main heat exchanger 20, and the air outlet of the fan 60 is connected to the air inlet 112 of the condensing heat exchanger 10. The burner 70 is located below the main heat exchanger 20 and is used to provide heat to the main heat exchanger 20.

[0081] Cold water enters the main heat exchanger 20 via the inlet pipe 30 and the condenser heat exchanger 10, completing the first heat exchange. The resulting hot water is discharged through the outlet pipe 40 for user use. The high-temperature flue gas generated by the burner 70 forms medium-temperature flue gas after completing the first heat exchange in the main heat exchanger 20. Under the action of the fan 60, the medium-temperature flue gas is introduced into the condenser heat exchanger 10 for a second heat exchange, preheating the water in the inlet pipe 30 at the condenser heat exchanger 10, making full use of the heat generated by the burner 70 and improving the heat exchange efficiency. The condensate generated during the heat exchange process in the condenser heat exchanger 10 enters the second chamber 102 through the first chamber 101 and is directly absorbed by the water suction element 3, achieving zero discharge of condensate.

[0082] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A condensing heat exchanger, characterized in that, include: The housing (1) has a first chamber (101) and a second chamber (102) arranged vertically and communicating with each other. A heat exchange pipeline (2) is installed in the first chamber (101), and the condensate generated during the heat exchange process of the heat exchange pipeline (2) can enter the second chamber (102) from the first chamber (101); A water-absorbing element (3) is disposed in the second chamber (102), and the water-absorbing element (3) is used to absorb the condensate in the second chamber (102); A heating module is disposed in the second chamber (102) and in contact with the water-absorbing element (3). The heating module is used to heat and dry the water-absorbing element (3).

2. The condensing heat exchanger according to claim 1, characterized in that, The heating module includes a heating plate (4) disposed in the second chamber (102). The heating plate (4) divides the second chamber (102) into an upper and lower accommodating cavity (1021) and a heat dissipation cavity (1022). The water-absorbing component (3) is located in the accommodating cavity (1021).

3. The condensing heat exchanger according to claim 2, characterized in that, The heat exchange pipeline (2) is provided with an inlet pipe section (21) and an outlet pipe section (22). The bottom of the shell (1) is provided with a heat exchange inlet connector (6) and a heat exchange outlet connector (7). The inlet pipe section (21) passes through the heating plate (4) and is connected to the heat exchange inlet connector (6). The outlet pipe section (22) passes through the heating plate (4) and is connected to the heat exchange outlet connector (7).

4. The condensing heat exchanger according to claim 3, characterized in that, The heating plate (4) is provided with a first perforation (41) at the position corresponding to the water inlet pipe section (21) and the water outlet pipe section (22). The water inlet pipe section (21) and the water outlet pipe section (22) pass through the corresponding first perforation (41). A first water stop (42) is provided between the water inlet pipe section (21) and the water outlet pipe section (22) and the hole wall of the corresponding first perforation (41).

5. The condensing heat exchanger according to claim 1, characterized in that, The housing (1) is provided with a partition (5), which divides the housing (1) into a first chamber (101) and a second chamber (102). The partition (5) is provided with a plurality of water-permeable holes (51), and the first chamber (101) and the second chamber (102) are connected through the plurality of water-permeable holes (51).

6. The condensing heat exchanger according to claim 5, characterized in that, The housing (1) includes a detachably connected upper cover (11) and a lower cover (12), and the partition (5) is sandwiched between the upper cover (11) and the lower cover (12) and is sealed to the upper cover (11) and / or the lower cover (12).

7. The condensing heat exchanger according to claim 6, characterized in that, The upper cover (11) has a first connecting part (111) circumferentially arranged at one end facing the lower cover (12), and the lower cover (12) has a second connecting part (121) circumferentially arranged at one end facing the upper cover (11). The outer periphery of the partition (5) is provided with a third connecting part (52), which is sandwiched between the first connecting part (111) and the second connecting part (121) and is detachably fixedly connected to both the first connecting part (111) and the second connecting part (121).

8. The condensing heat exchanger according to claim 7, characterized in that, The partition (5) has a surrounding edge structure (53) around its outer perimeter, the upper cover (11) is fitted over the surrounding edge structure (53), and the third connecting part (52) is arranged around the surrounding edge structure (53).

9. The condensing heat exchanger according to claim 7, characterized in that, The third connecting part (52) is provided with a sealing groove (521) on the side facing the first connecting part (111), and a sealing element (522) is provided in the sealing groove (521), and the sealing element (522) can make sealing contact with the first connecting part (111). And / or, the third connecting part (52) is provided with an overlapping groove (523) on the side opposite to the first connecting part (111), and the edge of the opening of the lower cover (12) can fit into the overlapping groove (523).

10. A gas-fired water heater, characterized in that, It includes a main heat exchanger (20) and a condensing heat exchanger as described in any one of claims 1-9, wherein the heat exchange outlet of the condensing heat exchanger is connected to the inlet of the main heat exchanger (20), and the flue gas outlet of the main heat exchanger (20) is connected to the air inlet (112) of the condensing heat exchanger.

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