Condensation heat exchange device and gas water heater

Abstract

The utility model belongs to the technical field of water heaters, and particularly discloses a condensation heat exchange device and a gas water heater. The condensation heat exchange device comprises a condensation heat exchanger, an atomization assembly and a box body assembly, the heat exchanger is arranged in the box body assembly, the box body assembly is provided with an installation opening, a smoke inlet and a smoke outlet, and the installation opening is located in the bottom of the box body assembly; a bearing part is arranged at the bottom of the box body assembly, the first side of the atomization assembly is matched with the bearing part in an inserted mode so as to bear the first side of the atomization assembly, and the second side, opposite to the first side, of the atomization assembly is detachably connected with the box body assembly through a first fastener so that the atomization assembly can seal the mounting opening. According to the condensation heat exchange device, the disassembly and assembly convenience of the atomization assembly can be improved, daily maintenance is facilitated, and therefore the service life of the atomization assembly is prolonged, and the condensation heat exchange reliability of the gas water heater is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a condensation heat exchange device and a gas water heater. Background Art

[0002] A gas water heater is a gas appliance that generates high-temperature flue gas through gas combustion and transfers the heat of the flue gas to cold water flowing through a heat exchanger through a heat exchange effect to prepare hot water. In order to improve the heat exchange efficiency of the gas water heater, a condensation heat exchange device is provided in the gas water heater to perform secondary heat exchange on the flue gas after heat exchange by the main heat exchanger. By condensing the flue gas to release heat, the cold water about to enter the heat exchanger in the water inlet pipe is preheated, the heat exchange efficiency is improved, and energy is saved.

[0003] During the process of condensing the flue gas to release heat, condensed water will be generated. In order to reduce the embedded pipes required for discharging the condensed water and avoid the influence of the embedded pipes on the overall appearance of the gas water heater, some gas water heaters with condensation heat exchange functions will vaporize the condensed water mist through an additional atomizer and discharge it through the smoke exhaust pipe. The atomizer is usually installed at the bottom of the condensation chamber housing to facilitate the condensed water in the condensation chamber housing to submerge the atomizer. However, the condensed water formed by the flue gas will be weakly acidic and have insufficient cleanliness, and the risk of the atomizer malfunctioning is relatively high, and it needs to be frequently overhauled. The fixedly installed atomizer is inconvenient to disassemble and assemble, and the daily overhaul operation is difficult, resulting in a greatly reduced service life of the atomizer, insufficient reliability of the condensation atomization function of the gas water heater, and affecting the user experience. Summary of the Utility Model

[0004] The first technical problem solved by the utility model is to provide a condensation heat exchange device that can solve the problems of inconvenient disassembly and assembly of the atomizer and difficult daily overhaul operation in the existing condensation heat exchange device, thus greatly reducing the service life.

[0005] The second technical problem solved by the utility model is to provide a gas water heater with a condensation heat exchange device that can solve the problems of inconvenient disassembly and assembly of the existing atomizer, difficult daily overhaul operation, thus resulting in low reliability of the condensation atomization function and poor user experience.

[0006] The above first technical problem is solved by the following technical solutions:

[0007] A condensing heat exchange device is provided. The condensing heat exchange device includes a condensing heat exchanger, an atomizing assembly, and a box body assembly. The heat exchanger is disposed within the box body assembly. The box body assembly is provided with an installation opening, a flue gas inlet, and a flue gas outlet. The installation opening is located at the bottom of the box body assembly. A receiving portion is provided at the bottom of the box body assembly. The first side of the atomizing assembly is inserted and cooperated with the receiving portion to support the first side of the atomizing assembly. The second side of the atomizing assembly opposite to the first side is detachably connected to the box body assembly by a first fastener so that the atomizing assembly seals the installation opening.

[0008] The condensing heat exchange device of the present utility model has the following beneficial effects compared with the background art: The condensing heat exchange device includes an atomizing assembly and a box body assembly. The atomizing assembly is connected to the installation opening to seal the installation opening. During the operation of the condensing heat exchange device, flue gas enters the box body assembly from the flue gas inlet. The high-temperature water vapor in the flue gas is condensed by the condensing heat exchanger to form condensed water droplets, which drop to the bottom of the box body assembly. The atomizing assembly can atomize the condensed water to generate mist, and the mist can be discharged from the flue gas outlet of the box body assembly. There is no need to additionally provide a condensed water discharge pipe, which avoids damaging the appearance integrity of the gas water heater. The first side of the atomizing assembly is inserted and cooperated with the receiving portion to support the first side of the atomizing assembly. The second side of the atomizing assembly is detachably connected to the box body assembly by a first fastener. When installing the atomizing assembly, first insert and cooperate the first side of the atomizing assembly with the receiving portion, and then install and connect the first fastener on the second side. During the installation of the first fastener, there is no need to lift the atomizing assembly. The insertion and cooperation structure between the first side of the atomizing assembly and the receiving portion provides a good supporting effect and is convenient for operation. Moreover, the insertion and cooperation structure between the first side of the atomizing assembly and the receiving portion also reduces the use of fasteners such as screws, making it more convenient for disassembly and assembly, greatly improving the daily maintenance efficiency of the atomizing assembly, thus extending the service life of the atomizing assembly and improving the reliability of the condensing heat exchange function.

[0009] In one embodiment, one of the receiving portion and the atomizing assembly is provided with an installation through hole, and the other has a plugging portion. The plugging portion is inserted into the installation through hole to support the first side of the atomizing assembly.

[0010] In one embodiment, the box body assembly includes a box body and two fixing frames. The two fixing frames are both detachably connected to the box body. The plugging portion is provided on the first side of the atomizing assembly. One of the fixing frames is provided with the receiving portion, and the receiving portion is provided with the installation through hole. The second side of the atomizing assembly opposite to the first side is detachably connected to the other fixing frame by the first fastener.

[0011] In one embodiment, the atomization assembly includes an atomizer and a base. The base is provided with a receiving cavity, the atomizer is received in the receiving cavity, the receiving cavity communicates with the cartridge assembly, and the base is detachably connected to the cartridge assembly.

[0012] In one embodiment, the base includes a mounting frame, a seat body, and a mounting flange surrounding and connecting to the peripheral side of the seat body. The mounting frame is abutted and disposed on the lower side of the mounting flange, and both the first side and the second side are disposed on the mounting frame.

[0013] In one embodiment, the atomization assembly further includes a seal, which is disposed between the cartridge assembly and the base to seal the connection between the base and the cartridge assembly; and / or,

[0014] The atomization assembly further includes a filter element, which is disposed above the atomizer.

[0015] In one embodiment, a condensation cavity and a smoke exhaust cavity are arranged side by side and separated inside the cartridge assembly. An atomization cavity is disposed below the smoke exhaust cavity. A communication channel is formed between the smoke exhaust cavity and the atomization cavity. The condensation cavity communicates with the communication channel, and the condensation heat exchanger is disposed in the condensation cavity;

[0016] The lower end of the condensation cavity is lower than the upper port of the atomization cavity, and the lower end of the condensation cavity is separated from the atomization cavity by a partition member. The lower end of the smoke exhaust cavity is lower than the smoke inlet to guide a part of the smoke flowing through the condensation heat exchanger to flow upward along the partition member to the communication channel; the top end of the partition member is inclined from one side of the condensation heat exchanger to the other side in a direction away from the smoke exhaust cavity.

[0017] In one embodiment, the condensation heat exchange device further includes a neutralization and filtration assembly for neutralizing and filtering condensed water. The neutralization and filtration assembly includes a filter box and a filter core. The filter box is provided with a filtration cavity, the filter core is disposed in the filtration cavity, one end of the filter box is open to communicate with the condensation cavity, an exhaust gap is formed in the side wall of the filter box, the exhaust gap is located above the filter core, and the filtration cavity communicates with the atomization cavity.

[0018] In one embodiment, an atomization water supply channel is disposed between the filtration cavity and the atomization cavity. The water inlet of the atomization water supply channel communicates with the filtration cavity, and the water outlet communicates with the atomization cavity. The height of the water inlet is lower than the height of the water outlet to form a water seal structure.

[0019] The above second technical problem is solved by the following technical solutions:

[0020] A gas water heater is provided, which includes a bottom case and the above-mentioned condensation heat exchange device. The bottom case is provided with an opening, and the first side of the atomization assembly faces the opening.

[0021] Compared with the background art, the gas water heater of the present utility model has the following beneficial effects: The gas water heater has the above-mentioned condensation heat exchange device. The first side of the atomization assembly is inserted and cooperated with the receiving part to support the first side of the atomization assembly. The second side of the atomization assembly is detachably connected to the box body assembly through the first fastener. During the installation of the first fastener, it is not necessary to lift the atomization assembly. The structure of the insertion and cooperation between the first side of the atomization assembly and the receiving part provides a good stabilizing effect and is convenient for operation. Moreover, the structure of the insertion and cooperation between the first side of the atomization assembly and the receiving part also reduces the use of fasteners such as screws, making disassembly and assembly more convenient, greatly improving the daily maintenance efficiency of the atomization assembly, thereby extending the service life of the atomization assembly and improving the condensation heat exchange reliability of the gas water heater. At the same time, the first side of the atomization assembly faces the opening. In this way, after opening the panel to expose the opening of the bottom case, it is convenient for users to directly perform installation, disassembly and maintenance from the front of the opening of the bottom case. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the condensation heat exchange device provided by the embodiment of the present utility model;

[0023] Figure 2 It is a structural sectional view of the condensation heat exchange device provided by the embodiment of the present utility model;

[0024] Figure 3 It is Figure 2 a partial sectional view along the A-A direction in

[0025] Figure 4 It is Figure 3 a disassembly and assembly schematic diagram of the atomization assembly in

[0026] Figure 5 It is a schematic diagram of the disassembled structure of the atomization assembly provided by the embodiment of the present utility model;

[0027] Figure 6 It is a schematic diagram of the disassembled structure of the condensation heat exchange device provided by the embodiment of the present utility model;

[0028] Figure 7 It is a schematic diagram of the internal structure of the condensation heat exchange device provided by the embodiment of the present utility model;

[0029] Figure 8 It is a schematic diagram of the internal structure of the gas water heater provided by the embodiment of the present utility model.

[0030] Label Description:

[0031] 1. Condensation heat exchanger;

[0032] 2. Atomization assembly; 20. Threaded hole; 21. Insertion part; 22. Atomizer; 221. Water level sensor; 23. Base; 231. Accommodation cavity; 232. Installation frame; 233. Base body; 234. Installation flange; 235. Drainage hole; 24. Seal; 25. Filter element; 251. Filter element pressing plate

[0033] 3. Cartridge assembly; 31. Atomization cavity; 32. Installation through hole; 33. Cartridge; 331. Installation post; 3311. Installation hole; 332. Smoke outlet; 333. Smoke inlet; 34. Fixing frame; 341. First fixing frame; 342. Second fixing frame; 35. Partition member; 351. Atomization cavity water inlet; 36. Mist exhaust hood; 361. Outer housing; 362. Inner housing; 37. Condensation cavity; 38. Smoke exhaust cavity; 39. Communication channel

[0034] 4. Neutralization and filtration assembly; 41. Filter box; 411. Exhaust notch; 412. Filtration cavity; 413. Filter box cover; 4131. Condensate drainage port; 42. Filter element

[0035] 5. Bottom case; 50. Opening

[0036] 100. Burner; 200. Main heat exchanger Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0038] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0039] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0040] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0041] As Figure 1 and Figure 2 shown, an embodiment of the present utility model first provides a condensation heat exchange device. The condensation heat exchange device includes a condensation heat exchanger 1, and the condensation heat exchanger 1 is used for condensing flue gas to exchange heat and heat a fluid. After the flue gas exchanges heat, it condenses to generate condensed water. To solve the problem of discharging the condensed water, the condensation heat exchange device further includes an atomization assembly 2 and a box body assembly 3. The box body assembly 3 is provided with an installation port, a flue gas inlet 333, and a flue gas outlet 332. The installation port is located at the bottom of the box body assembly 3. An atomization chamber 31 is formed in the box body assembly 3, and the condensed water can flow into the atomization chamber 31. The box body assembly 3 also has a condensation chamber 37, and the condensation heat exchanger 1 is arranged in the condensation chamber 37. The flue gas inlet 333 communicates with the condensation chamber 37. The flue gas generated by combustion enters the condensation chamber 37 through the flue gas inlet 333 and exchanges condensation heat with the pipeline of the condensation heat exchanger 1. The condensation chamber 37 communicates with the atomization chamber 31, and the condensed water droplets generated by the condensation heat exchange fall to the bottom of the box body assembly 3.

[0042] The atomization assembly 2 seals the installation port of the box body assembly 3. The atomization assembly 2 can atomize the dripping condensed water to generate mist, and the mist can be discharged from the flue gas outlet 332. The flue gas outlet 332 communicates with an external smoke exhaust pipeline. The generated mist and a part of the flue gas remaining after condensation are discharged from the flue gas outlet 332, and there is no need to additionally provide a condensed water discharge pipeline, thus avoiding damage to the appearance integrity of the gas water heater.

[0043] The first side of the atomization assembly 2 is inserted and cooperated with the receiving part to support the atomization assembly 2. The second side of the atomization assembly 2 opposite to the first side is detachably connected to the box body assembly 3 through a first fastener. When installing the atomization assembly 2, first insert and cooperate the first side of the atomization assembly 2 with the receiving part, and then install and connect the first fastener on the second side. During the process of installing the first fastener, there is no need to lift the atomization assembly 2. The insertion and cooperation structure between the first side of the atomization assembly 2 and the receiving part provides a good stabilizing effect and is convenient for operation. Moreover, the insertion and cooperation structure between the first side of the atomization assembly 2 and the receiving part also reduces the use of fasteners such as screws, making disassembly and assembly more convenient, greatly improving the daily maintenance efficiency of the atomization assembly 2, thereby prolonging the service life of the atomization assembly 2 and improving the reliability of the condensation heat exchange function.

[0044] It should be noted that after the first side of the atomization component 2 is inserted and matched with the receiving part and then the second side of the atomization component 2 is installed and connected to the cartridge component 3 through the first fastener, at this time, the atomization component 2 can directly press or indirectly press on the cartridge component 3 through the seal 24 to seal the installation port.

[0045] The first side and the second side are arranged oppositely. In this way, installation can be carried out from the opposite sides of the atomization component 2, as Figure 4 shown; or, the first side and the second side are arranged adjacently, so as to install on the adjacent sides in the circumferential direction of the atomization component 2, and the connection between the atomization component 2 and the cartridge component 3 can be realized.

[0046] In an embodiment, the implementation manner of the insertion and matching structure between the first side of the atomization component 2 and the receiving part is as follows: One of the receiving part and the atomization component 2 is provided with an installation through hole 32, and the other has a plugging part 21, and the plugging part 21 can be plugged into the installation through hole 32, so as to realize supporting the first side of the atomization component 2, as Figure 3 shown. The specific shape of the plugging part 21 can be set according to the shape of the installation through hole 32, and this embodiment is not limited thereto.

[0047] Next, the description will be made with the installation through hole 32 opened on the cartridge component 3: In order to simplify the processing technology of the cartridge component 3, the cartridge component 3 includes a cartridge 33 and two fixing frames 34. The two fixing frames 34 are detachably connected to the cartridge 33. The first side of the atomization component 2 is provided with a plugging part 21, and one of the fixing frames 34 is provided with a receiving part, and the receiving part is provided with an installation through hole 32; the second side of the atomization component 2 opposite to the first side is detachably connected to the other fixing frame 34 through a first fastener, and the plugging part 21 on the atomization component 2 can be plugged into the installation through hole 32.

[0048] In order to realize the connection between the cartridge 33 and the two fixing frames 34, as Figure 4 shown, the side wall of the cartridge 33 has a protruding installation post 331, and an installation hole 3311 is opened on the installation post 331. A second fastener (not shown in the figure) passes through the fixing frame 34 to be connected to the installation hole 3311. The second fastener can be a screw or a bolt, etc. The installation post 331 has a certain length to facilitate opening the installation hole 3311, improve the connection strength between the fixing frame 34 and the cartridge 33, ensure the reliability of the fixing frame 34, and thus provide reliable support for the atomization component 2.

[0049] The first fastener is a bolt, and both the cartridge component 3 and the atomization component 2 are provided with threaded holes 20. The first fastener is sequentially threadedly connected to the two threaded holes 20, so as to realize the detachable connection between the cartridge component 3 and the atomization component 2.

[0050] In an embodiment, the atomization component 2 includes an atomizer 22 and a base 23, and the base 23 is provided with a receiving cavity 231, asFigure 5 As shown; the atomizer 22 is accommodated in the accommodation cavity 231, and the accommodation cavity 231 can communicate with the cartridge assembly 3, and is detachably connected to the cartridge assembly 3 through the base 23.

[0051] In order to reduce the processing difficulty of the base 23, the base 23 includes a mounting frame 232, a base body 233, and a mounting flange 234 that surrounds and connects to the peripheral side of the base body 233. The base body 233 and the mounting flange 234 are integrally formed and can be formed by casting, sheet metal processing, etc. The mounting frame 232 can pass through the base body 233 and is abutted and arranged on the lower side of the mounting flange 234, and the connection between the base 23 and the cartridge assembly 3 is realized through the mounting frame 232. One side frame of the mounting frame 232 has a partial extension as the insertion part 21. Matching the shape of the mounting through hole 32 on the fixing frame 34, the insertion part 21 is formed in a thin plate shape; a threaded hole 20 is provided on the other side frame of the mounting frame 232, and as the second side, it is threadedly connected to the fixing frame 34 that also has a threaded hole 20. The threaded hole 20 on the fixing frame 34 and the threaded hole 20 on the mounting frame 232 can correspond one by one.

[0052] The fixing frame 34 includes a first fixing frame 341 and a second fixing frame 342. The first fixing frame 341 is a thin plate-like structure. The first fixing frame 341 is vertically installed on the outer side surface of the cartridge 33. The first fixing frame 341 is provided with a mounting through hole 32. Therefore, the mounting frame 232 moves left and right in the horizontal direction so that the insertion part 21 is inserted into the mounting through hole 32. The second fixing frame 342 is a bent structure with a flange edge. The threaded hole 20 is provided on the flange edge. The mounting frame 232 can abut against the flange edge, which is convenient for installing the atomization assembly 2 from bottom to top. When it is necessary to repair the atomizer 22, remove the first fastener between the mounting frame 232 and the second fixing frame 342, and rotate the base 23 by a certain angle around the connection between the first fixing frame 341 and the insertion part 21, as Figure 4 shown, simplifying the disassembly and installation of the atomization assembly 2 and making the operation more convenient.

[0053] A sewage discharge hole 235 that selectively communicates with the accommodation cavity 231 is provided at the bottom of the base 23. If the atomizer 22 malfunctions, the sewage discharge hole 235 can be opened, and an external pipeline can be temporarily installed at the sewage discharge hole 235 to discharge the condensed water in the atomization cavity 31, preventing the condensed water in the atomization cavity 31 from accumulating too much and entering the external smoke exhaust pipeline through the smoke outlet 332.

[0054] The atomizer 22 includes an atomizing head and a water level sensor 221. The water level sensor 221 can sense the real-time water level change. The atomizing head and the water level sensor 221 are communicatively connected to achieve the water level control of the atomizer 22. The atomizer 22 has an atomization trigger water level. Only when the water level in the atomization chamber 31 is higher than the atomization trigger water level, the atomizing head will start the atomization treatment program to achieve the atomization treatment of the condensed water. When the water level in the atomization chamber 31 is lower than the atomization trigger water level, the atomizing head stops working to prevent the atomizer 22 from dry burning and causing device damage.

[0055] Specifically, the optimal atomization water level is set at 30 mm to 45 mm to ensure the maximum fog formation amount and fog output effect. In addition, the atomizer 22 also has a highest warning water level. When the atomizer 22 fails or gets fouled, the atomization amount will gradually become smaller, resulting in the atomization speed being unable to match the condensed water formation speed, and the water level in the atomization chamber 31 continuously fluctuates and rises. When the condensed water level in the atomization chamber 31 crosses the highest warning water level, a drainage warning will be triggered, and the user will be prompted through alarm signals such as sound or light, and an external pipeline needs to be temporarily installed at the sewage discharge hole 235 to drain the condensed water.

[0056] The atomization assembly 2 further includes a seal 24. The seal 24 is an O-ring, as Figure 5 shown; the seal 24 is disposed between the box body assembly 3 and the base 23 to seal the connection between the base 23 and the box body assembly 3. The first end of the box body 33 has a connecting flange, and the seal 24 is clamped between the connecting flange and the mounting frame 232 to prevent the condensed water in the atomization chamber 31 from leaking.

[0057] Inside the box body assembly 3, the condensation chamber 37 and the smoke exhaust chamber 38 are arranged side by side and separated. The condensation chamber 37 is connected to the smoke inlet 333, and the condensation chamber 37 is used to accommodate the condensation heat exchanger 1. The condensation heat exchanger 1 has a U-shaped heat exchange tube, and the smoke enters from the smoke inlet 333 and flows along the heat exchange tube, as Figure 6 shown. The smoke exhaust chamber 38 is connected to the smoke outlet 332. An atomization chamber 31 is provided below the smoke exhaust chamber 38, and a communication channel 39 is formed between the smoke exhaust chamber 38 and the atomization chamber 31. The mist in the atomization chamber 31 rises and enters the smoke exhaust chamber 38 through the communication channel 39. The condensation chamber 37 is connected to the communication channel 39, and the condensation heat exchanger 1 is disposed in the condensation chamber 37. The lower end of the condensation chamber 37 is lower than the upper port of the atomization chamber 31, and the lower end of the condensation chamber 37 is separated from the atomization chamber 31 by a partition member 35. The lower end of the condensation heat exchanger 1 is lower than the lower end of the smoke exhaust chamber 38 to guide a part of the smoke flowing through the condensation heat exchanger 1 to flow upward along the partition member 35 to the communication channel 39. In this way, it is possible to prevent the smoke from directly blowing on the atomization chamber 31 and affecting the upward flow of the mist.

[0058] The condensation heat exchange device further includes a neutralization and filtration assembly 4, and the neutralization and filtration assembly 4 is used for neutralizing and filtering the condensed water. The neutralization and filtration assembly 4 includes a filter box 41 and a filter element 42. The filter element 42 is arranged in a filter cavity 412 formed in the filter box 41, and the filter cavity 412 can communicate with the atomization cavity 31. One end of the filter box 41 is open, so that the filter cavity 412 communicates with the condensation cavity 37 where the condensation heat exchanger 1 is located. Preferably, the filter box 41 and the box body 33 are integrally formed, and the filter box 41 is arranged on the lower side of the condensation cavity 37, and the condensed water automatically flows into the filter box 41 by gravity. An exhaust notch 411 is formed in the side wall of the filter box 41, and the height of the exhaust notch 411 is higher than that of the filter element 42, as Figure 2 and Figure 7 shown; some air bubbles accumulated in the filter element 42 can be discharged through the exhaust notch 411 on the side wall, avoiding the exhaust from the upper end opening of the filter box 41 from blocking the condensed water, so that the condensed water can smoothly flow into the filter box 41. Since the filter box 41 and the box body 33 are integrally formed and the exhaust notch 411 communicates with the condensation cavity 37, the gas discharged through the exhaust notch 411 can re-enter the condensation cavity 37.

[0059] In order to realize the flow of the condensed water after neutralization and filtration, an atomization water supply channel is arranged between the filter cavity 412 and the atomization cavity 31. The water inlet of the atomization water supply channel communicates with the filter cavity 412, and the water outlet communicates with the atomization cavity 31. The height of the water inlet is lower than that of the water outlet to form a water seal structure. The atomization water supply channel is arranged vertically, as Figure 2 shown by the bold arrow in the figure. When the condensed water in the filter cavity 412 enters the atomization cavity 31 through the atomization water supply channel, the water seal structure can prevent the flue gas in the filter cavity 412 and the atomization cavity 31 from communicating with each other.

[0060] The filter element 42 includes a porous filter element arranged at the top and a neutralization and purification filter element at the bottom along the flowing direction of the condensed water. The porous filter element at the top can withstand the impact of the high-temperature heat flow in the oncoming direction and is used for preliminarily filtering impurities in the condensed water. The neutralization and purification filter element at the bottom performs neutralization and filtration treatment on the condensed water to avoid fine impurities from entering the atomization cavity 31 to form scale and affect the final atomization amount. The outer periphery of the filter element 42 includes a filter screen, so as to integrate the above-mentioned porous filter element and the neutralization and purification filter element into an integral structure, which is convenient and compact to be installed in the filter cavity 412. A bypass gap is formed between the filter element 42 and the inner cavity wall of the filter box 41. When the water flow passing rate of the condensed water decreases after the filter element 42 is used for a long time, the condensed water can seep out from the periphery of the filter screen and enter the atomization water supply channel through the bypass gap, avoiding the blockage of the condensed water.

[0061] The bottom of the filter box 41 has a filter box cover 413. On the side of the filter box cover 413 facing the filter chamber 412, reinforcing ribs are provided to form a water passage. The reinforcing ribs hold up the bottom of the filter element 42, and the water passage can communicate with the atomizing water supply passage. The filter box cover 413 is provided with a condensate sewage discharge port 4131. When it is necessary to clean the filter box 41 or when the atomizing water supply passage is blocked, the normally closed sewage valve can be opened to connect the condensate sewage discharge port 4131 to the external sewage pipe for emergency drainage treatment.

[0062] The partition member 35 is cylindrical to surround the atomizing chamber 31. The condensation heat exchanger 1 is arranged on one side of the partition member 35. Part of the flue gas can flow circumferentially along the partition member 35 to the other side, and finally rise along the partition member 35 surrounding the atomizing chamber 31 and be discharged from the flue gas outlet 332, as Figure 2 shown by the dotted arrow in the figure. The top end of the partition member 35 is inclined from one side of the condensation heat exchanger 1 to the other side in a direction away from the smoke exhaust chamber 38. Since the flow path of the flue gas flowing to the other side far from the flue gas inlet 333 is longer and the flow resistance is relatively greater, in order to ensure the uniformity of the flue gas flow rate and velocity in the entire circumference of the atomizing chamber 31, the top of the partition member 35 is inclined, as Figure 2 shown. The inclination angle is α. In this way, the flue gas on the other side far from the flue gas outlet 332 can enter the flue gas inlet 333 more evenly and smoothly, forming a relatively uniform flue gas flow field with the flue gas on the side of the flue gas outlet 332.

[0063] The partition member 35 extends downward to connect with the filter box 41. An atomizing water supply passage is arranged between the partition member 35 and the filter box 41. The partition member 35 is provided with an atomizing chamber water inlet 351, and the atomizing water supply passage communicates with the atomizing chamber 31 through the atomizing chamber water inlet 351.

[0064] In order to better guide the mist and flue gas, the box body assembly 3 further includes a mist exhaust hood 36. The mist exhaust hood 36 is arranged in the box body 33. Both ends of the mist exhaust hood 36 are through. One end faces the atomizing chamber 31, and the other end communicates with the flue gas outlet 332. The atomized mist and a small amount of residual flue gas after condensation flow in the mist exhaust hood 36 and finally flow out through the flue gas outlet 332.

[0065] Preferably, the mist exhaust hood 36 includes an outer hood body 361 and an inner hood body 362, as Figure 6As shown in the figure; the outer housing 361 and the inner housing 362 are nested and fixedly connected to form a double-layer smoke discharge channel. The smoke discharge channels together form a smoke exhaust cavity 38, and a communication channel 39 is formed between the mist discharge hood 36 and the partition member 35. The inner-layer smoke discharge channel is the main flow channel, and the outer-layer smoke discharge channel is the secondary flow channel. The flue gas with a higher temperature mainly discharges from the outer-layer secondary flow channel to heat-insulate and heat the mist discharge hood 36, while the mist mainly discharges through the internal main flow channel, avoiding the rapid liquefaction of the mist due to cold, resulting in too large a backflow and reducing the discharge amount of the condensed and atomized mist.

[0066] When the internal main flow channel is too large and the external channel is too small, the wall temperature of the cavity of the mist discharge hood 36 will be too cold or the heat insulation will be insufficient, making the mist easily gather and liquefy and flow back on the cold wall, reducing the mist discharge amount. Therefore, preferably, the more suitable flow ratio of the inner-layer smoke discharge channel to the outer-layer smoke discharge channel is 1.65 - 1.90, which can not only ensure that the inner-layer smoke discharge channel timely gathers and accommodates the generated mist, but also enables the mist discharge hood 36 to obtain sufficient heat insulation to avoid the liquefaction and backflow of the mist due to cold, ensuring that the flue gas and mist can be discharged maximally. The flow ratio of the inner-layer smoke discharge channel to the outer-layer smoke discharge channel can be controlled by the channel diameter.

[0067] In one embodiment, the external smoke exhaust pipe can adopt two coaxial smoke exhaust pipes (not shown in the figure) inside and outside. The two coaxial smoke exhaust pipes form a double-layer channel, and the double-layer channel respectively corresponds to and communicates with the inner-layer smoke discharge channel and the outer-layer smoke discharge channel of the mist discharge hood 36. The flue gas and mist discharge from the double-layer channel. The main flow channel is arranged inside, and the secondary flow channel is arranged outside. In this way, the hot flue gas mainly enters the secondary flow channel of the external smoke exhaust pipe through the outer-layer smoke discharge channel. In this way, the mist is separated from the outer-layer smoke exhaust pipe with a lower temperature on the outside as much as possible, reducing the phenomenon of gas aggregation and liquefaction and achieving a better effect of discharging the mist outward.

[0068] The distance between the bottom of the mist discharge hood 36 and the top of the partition member 35 is H, that is, the length of the communication channel 39 is H. As Figure 2 shown, H is preferably set to 20 mm - 30 mm to ensure that the flue gas can enter the smoke discharge channel of the mist discharge hood 36 evenly upward along the periphery of the partition member 35 with a smaller resistance.

[0069] Since the communication channel 39 in the atomization chamber 31 and the mist discharge hood 36 is open, the water quality of the condensed water in the atomization chamber 31 may be affected by the reflux liquid in the smoke discharge channel and the flue gas in the condensation chamber 37, resulting in the water quality in the atomization chamber 31 becoming weakly acidic again after being neutralized and filtered by the neutralization and filtration assembly 4, affecting the service life of the atomizer 22. Therefore, in one embodiment, the atomization assembly 2 further includes a filter member 25. The filter member 25 is arranged above the atomizer 22, and the filter member 25 balances the acidity and alkalinity of the water quality in the atomization chamber 31.

[0070] Preferably, the filter element 25 is annularly distributed at the bottom of the atomization chamber 31, and the filter element 25 surrounds the atomizing head and the water level sensing element 221. Meanwhile, the atomization assembly 2 is further provided with a filter element pressing plate 251. The filter element pressing plate 251 is connected to the inner side wall of the partition member 35 and covers the filter element 25 to limit and install the filter element 25 to prevent it from moving.

[0071] Secondly, an embodiment of the present utility model further provides a gas water heater, which includes a bottom case 5 and the condensation heat exchange device as described above. The bottom case 5 is provided with an opening 50, and the first side of the atomization assembly 2 faces the opening 50. As Figure 8 shown, the burner 100 of the gas water heater burns gas to generate high-temperature flue gas, and the high-temperature flue gas exchanges heat with the water in the main heat exchanger 200 to raise its temperature. Before the water enters the main heat exchanger 200, the heat-exchanged flue gas enters the condensation heat exchanger 1 to preheat the water by condensation heat exchange. The flue gas condensation generates condensate, which is atomized by the atomization assembly 2 to generate mist, and finally discharged through the flue gas outlet 332 of the box body assembly 3. The first side of the atomization assembly 2 is inserted and matched with the receiving portion to support the first side of the atomization assembly 2. The second side of the atomization assembly 2 is detachably connected to the box body assembly 3 through a first fastener; when installing the atomization assembly 2, first insert and match the first side of the atomization assembly 2 with the receiving portion, and then install and connect the first fastener on the second side. During the installation of the first fastener, it is not necessary to lift the atomization assembly 2. The insertion and matching structure between the first side of the atomization assembly 2 and the receiving portion provides a good supporting effect and is convenient for operation. Moreover, the insertion and matching structure between the first side of the atomization assembly 2 and the receiving portion also reduces the use of fasteners such as screws, making disassembly and assembly more convenient, greatly improving the daily maintenance efficiency of the atomization assembly 2, thereby extending the service life of the atomization assembly 2 and improving the condensation heat exchange reliability of the gas water heater; at the same time, the first side of the atomization assembly 2 faces the opening 50. In this way, after opening the panel to expose the opening 50 of the bottom case 5, it is convenient for users to directly perform installation, disassembly and maintenance from the front of the opening 50 of the bottom case 5.

[0072] In the specific content of the above specific embodiments, the technical features can be combined arbitrarily without contradiction. For the sake of brief description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.

[0073] The specific content of the above specific embodiments only expresses several embodiments of the present utility model. Its description is relatively specific and detailed, but it cannot be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A condensation heat exchange device, characterized in that, The condensation heat exchange device includes a condensation heat exchanger (1), an atomization assembly (2) and a box body assembly (3). The condensation heat exchanger (1) is arranged inside the box body assembly (3). The box body assembly (3) is provided with an installation opening, a flue gas inlet (333) and a flue gas outlet (332). The installation opening is located at the bottom of the box body assembly (3). A receiving portion is provided at the bottom of the box body assembly (3). The first side of the atomization assembly (2) is inserted and matched with the receiving portion to support the first side of the atomization assembly (2). The second side of the atomization assembly (2) opposite to the first side is detachably connected to the box body assembly (3) through a first fastener so that the atomization assembly (2) seals the installation opening.

2. The condensing heat exchange device according to claim 1, characterized in that, One of the receiving portion and the atomization assembly (2) is provided with an installation through hole (32), and the other has a plug-in portion (21). The plug-in portion (21) is inserted into the installation through hole (32) to support the first side of the atomization assembly (2).

3. The condensation heat exchange device according to claim 2, wherein, The box body assembly (3) includes a box body (33) and two fixing frames (34). The two fixing frames (34) are both detachably connected to the box body (3). The plug-in portion (21) is provided on the first side of the atomization assembly (2). One of the fixing frames (34) is provided with the receiving portion, and the receiving portion is provided with the installation through hole (32). The second side of the atomization assembly (2) opposite to the first side is detachably connected to the other fixing frame (34) through the first fastener.

4. The condensing heat exchange device according to claim 3, characterized in that, The atomization assembly (2) includes an atomizer (22) and a base (23). The base (23) is provided with a receiving cavity (231). The atomizer (22) is received in the receiving cavity (231). The receiving cavity (231) communicates with the box body assembly (3). The base (23) is detachably connected to the box body assembly (3).

5. The condensing heat exchange device according to claim 4, characterized in that, The base (23) includes an installation frame (232), a seat body (233) and an installation flange (234) surrounding and connecting to the peripheral side of the seat body (233). The installation frame (232) is abutted and arranged on the lower side of the installation flange (234). The first side and the second side are both arranged on the installation frame (232).

6. The condensation heat exchange device according to claim 5, wherein, The atomization assembly (2) further includes a seal (24). The seal (24) is arranged between the box body assembly (3) and the base (23) to seal the connection between the base (23) and the box body assembly (3). and / or The atomization assembly (2) further includes a filter element (25). The filter element (25) is arranged above the atomizer (22).

7. The condensation heat exchange device according to any one of claims 1-6, characterized in that, Inside the box body assembly (3), a condensation cavity (37) and a smoke exhaust cavity (38) are arranged side by side and separated. An atomization cavity (31) is arranged below the smoke exhaust cavity (38). A communication channel (39) is formed between the smoke exhaust cavity (38) and the atomization cavity (31). The condensation cavity (37) communicates with the communication channel (39). The condensation heat exchanger (1) is arranged in the condensation cavity (37). The lower end of the condensation chamber (37) is lower than the upper port of the atomization chamber (31), and the lower end of the condensation chamber (37) is separated from the atomization chamber (31) by a separation member (35). The lower end of the smoke exhaust chamber (38) is lower than the smoke inlet (333) to guide a part of the smoke flowing through the condensation heat exchanger (1) to flow upward along the separation member (35) to the communication channel (39). The top end of the separation member (35) is inclined from one side to the other side of the condensation heat exchanger (1) in a direction away from the smoke exhaust chamber (38).

8. The condensation heat exchange device according to claim 7, wherein The condensation heat exchange device further includes a neutralization and filtration assembly (4). The neutralization and filtration assembly (4) is used for neutralizing and filtering the condensed water. The neutralization and filtration assembly (4) includes a filter box (41) and a filter core (42). The filter box (41) is provided with a filter chamber (412). The filter core (42) is arranged in the filter chamber (412). One end of the filter box (41) is open to communicate with the condensation chamber (37). An exhaust gap (411) is formed in the side wall of the filter box (41). The exhaust gap (411) is located above the filter core (42). The filter chamber (412) communicates with the atomization chamber (31).

9. The condensing heat exchange device according to claim 8, wherein An atomization water supply channel is arranged between the filter chamber (412) and the atomization chamber (31). The water inlet of the atomization water supply channel communicates with the filter chamber (412), and the water outlet communicates with the atomization chamber (31). The height of the water inlet is lower than that of the water outlet to form a water seal structure.

10. Gas water heater, characterized in that, It includes a bottom shell (5) and the condensation heat exchange device according to any one of claims 1-9. The bottom shell (5) is provided with an opening (50). The first side of the atomization assembly (2) faces the opening (50).

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