Smoke exhaust device and water heater

Abstract

The utility model discloses a smoke exhaust device and a water heater, and relates to the technical field of water heaters, the smoke exhaust device comprises a collecting cover, a smoke exhaust pipe and an atomization module, the collecting cover is provided with an atomization cavity used for collecting condensate water, the atomization cavity is provided with a first side wall, and the first side wall is provided with an air inlet; the smoke exhaust pipe is arranged on the collecting cover and communicates with the atomization cavity. The atomization module is arranged on the collecting cover and used for atomizing condensate water in the atomization cavity, and the atomization center line of the atomization module deviates from the air inlet center line of the air inlet. According to the technical scheme, the atomization efficiency and effect of the smoke exhaust device can be improved.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a smoke exhaust device and a water heater. Background Technology

[0002] Traditional condensing gas water heaters typically achieve high energy efficiency by utilizing the latent heat of vaporization of flue gas. However, this process generates a large amount of condensate. Some related technologies incorporate an atomizing module in the exhaust system to atomize the condensate and discharge it with the flue gas. However, when the airflow is too high, the atomized jet from the module can be dispersed, impacting the side wall of the exhaust system and causing droplets to flow back. These droplets are difficult to carry away by the flue gas, thus affecting the atomization effect. Utility Model Content

[0003] The main purpose of this utility model is to propose a smoke exhaust device and a water heater, which aims to improve the atomization efficiency and effect of the smoke exhaust device.

[0004] To achieve the above objectives, the smoke extraction device proposed in this utility model includes:

[0005] The collection hood is provided with an atomizing chamber for collecting condensate, the atomizing chamber having a first sidewall with an air inlet;

[0006] A smoke exhaust pipe is provided at the collection hood, and the smoke exhaust pipe is connected to the atomizing chamber; and

[0007] An atomizing module is provided on the collection hood. The atomizing module is used to atomize the condensate in the atomizing chamber. The atomizing center line of the atomizing module is set off from the air inlet center line.

[0008] In one embodiment, the atomizing module and the air inlet are staggered on the projection plane perpendicular to the atomization center line of the atomizing module and in the air intake direction perpendicular to the air inlet.

[0009] And / or, the first sidewall is provided with a baffle, the baffle covers part of the air inlet, and the projection of the atomizing module toward the baffle falls into the baffle so as to be offset from the air inlet.

[0010] In one embodiment, the first sidewall is provided with a guide surface, which extends from the air inlet toward the atomizing module.

[0011] In one embodiment, the atomizing chamber has a highest water level position, and the lowest position of the guide surface is level with the highest water level position.

[0012] In one embodiment, the exhaust pipe is provided with an inlet communicating with the atomizing chamber, the atomizing chamber has a highest water level position, and the distance between the highest water level position and the plane where the inlet is located is greater than the height of the atomized beam emitted by the atomizing module.

[0013] In one embodiment, the smoke exhaust device further includes a liquid level detection module, which is used to detect the liquid level in the atomizing chamber; the atomizing module is used to turn on or off according to the signal fed back by the liquid level detection module.

[0014] In one embodiment, the liquid level detection module includes a float and a Hall sensor. The float has a magnetic component inside. The bottom wall of the atomizing chamber has an upwardly extending fixed post. The top of the fixed post has a limiting component. The float is movably fitted onto the fixed post. The Hall sensor is located at the end of the fixed post away from the limiting component.

[0015] In one embodiment, the atomizing module includes a first atomizer and a second atomizer, which are disposed at an interval within the atomizing chamber.

[0016] In one embodiment, the first atomizer and the second atomizer are arranged side by side and spaced apart along a first direction, and the minimum distance between the first atomizer and the second atomizer in the first direction is not less than 10 mm;

[0017] And / or, the overlapping area of ​​the atomization cross-sections of the first atomizer and the second atomizer is not greater than one-third of the total atomization cross-sectional area of ​​the first atomizer and the second atomizer.

[0018] In one embodiment, the atomizing chamber has a second sidewall opposite to the first sidewall along a first direction. The bottom wall of the atomizing chamber is provided with a first mounting surface for mounting the first atomizer and a second mounting surface for mounting the second atomizer. The first mounting surface and the second mounting surface are respectively located on both sides of the axis of the atomizing chamber. The first mounting surface is inclined downward from the axis of the atomizing chamber toward the first sidewall, and the second mounting surface is inclined downward from the axis of the atomizing chamber toward the second sidewall.

[0019] In one embodiment, the angle between the first mounting surface and the horizontal plane is no greater than 5 degrees;

[0020] And / or, the angle between the second mounting surface and the horizontal plane is no greater than 5 degrees.

[0021] In one embodiment, the collection hood is further provided with a collection chamber and a purification chamber. The collection chamber and the purification chamber are located on one side of the atomizing chamber along the lateral direction. The collection chamber is located above the purification chamber. The top of the collection chamber is provided with a collection port for introducing flue gas and condensate. The collection chamber is connected to the atomizing chamber through a connecting port. The purification chamber is connected to the atomizing chamber through the air inlet, so as to purify the condensate and output it to the atomizing chamber.

[0022] This utility model also proposes a water heater, including a water heater body and a flue gas exhaust device as described above. The water heater body includes a fan, a burner, and a heat exchanger arranged from top to bottom. The collection hood of the flue gas exhaust device is located below the heat exchanger, and the collection port of the flue gas exhaust device faces the heat exchanger. The fan is used to drive airflow from top to bottom through the burner and the heat exchanger to the flue gas exhaust device. The water heater also includes a control system electrically connected to the fan. The fan is also used to identify whether the air inlet of the flue gas exhaust device is blocked according to the wind pressure, and to send a fault signal to the control system when the air inlet is blocked.

[0023] The technical solution of this utility model collects flue gas and condensate through a collection hood. The flue gas flows through the atomizing chamber to the exhaust pipe and is finally discharged from the exhaust pipe. The condensate, after being atomized by the atomizing module, can be discharged with the flue gas through the exhaust pipe. Thus, it can simultaneously achieve the functions of flue gas exhaust and condensate drainage. Furthermore, the atomizing chamber has a first sidewall with an air inlet. The air inlet's center line is offset from the atomization center line of the atomizing module, meaning that the atomization center line of the atomizing module does not coincide with the air inlet's center line. This significantly reduces the impact of the airflow entering through the air inlet on the atomization process, making the atomization more uniform and stable. It also helps improve the airflow distribution within the entire atomizing chamber, promoting better discharge of condensate particles with the airflow. This effectively improves the atomization efficiency and effect of the flue gas exhaust device, while reducing the direct impact of strong winds on the atomized jet generated by the atomizing module. This reduces the internal water accumulation problem that may be caused by droplet backflow, thereby improving the operational reliability and service life of the water heater. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of an embodiment of the smoke exhaust device provided by this utility model;

[0027] Figure 2 for Figure 1 A top view of one embodiment;

[0028] Figure 3 for Figure 1 Top view of another embodiment;

[0029] Figure 4 for Figure 1 A front view of an embodiment;

[0030] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0031] Figure 6 for Figure 1 A front view of another embodiment;

[0032] Figure 7 for Figure 1 A side view of one embodiment;

[0033] Figure 8 for Figure 1 A side view of another embodiment;

[0034] Figure 9 for Figure 1 A side view of yet another embodiment;

[0035] Figure 10 for Figure 9 A magnified view of a section at point B in the middle;

[0036] Figure 11 for Figure 9 A magnified view of a section at point C;

[0037] Figure 12 A schematic diagram of the structure of an embodiment of the water heater provided by this utility model;

[0038] Figure 13 A schematic diagram of the circuit functional modules of a water heater embodiment provided by this utility model.

[0039] Explanation of icon numbers:

[0040] 100. Smoke exhaust device; 10. Collection hood; 101. Collection chamber; 1011. Collection port; 1012. Connecting port; 102. Purification chamber; 103. Atomizing chamber; 1031. First side wall; 1032. Air inlet; 1033. Guide surface; 1034. Second side wall; 20. Smoke exhaust pipe; 201. Smoke inlet; 202. Smoke outlet; 203. Smoke exhaust channel; 30. Atomizing module; 301. First mounting surface; 302. Second mounting surface; 31. First atomizer; 32. Second atomizer; 40. Baffle; 50. Liquid level detection module; 51. Float; 52. 53. Hall sensor; 54. Fixed column; 55. Limiting component; H1. First preset water level; H2. Second preset water level; P. Highest water level position; s. Distance between the highest water level position and the plane where the smoke inlet is located; h. Height of the atomized beam emitted by the atomizing module; d. Minimum distance between the first atomizer and the second atomizer; S1. Atomizing cross-sectional area of ​​the first atomizer; S2. Atomizing cross-sectional area of ​​the second atomizer; S12. Overlapping area of ​​the atomizing cross-sections of the first atomizer and the second atomizer; a1. Angle between the first mounting surface and the horizontal plane; a2. Angle between the second mounting surface and the horizontal plane;

[0041] 200. Water heater body; 210. Fan; 220. Burner; 230. Heat exchanger;

[0042] 300. Control system.

[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0045] Against the backdrop of energy conservation and emission reduction, improving the energy efficiency of water heaters has become an industry trend. Traditional condensing gas water heaters generally achieve high energy efficiency by utilizing the latent heat of vaporization of flue gas. However, this process generates a large amount of condensate. In some related technologies, water heater exhaust systems incorporate atomizing modules to atomize the condensate and discharge it with the flue gas. However, when the airflow of the water heater is too high, the atomized jet from the module can easily disperse, impacting the side wall of the exhaust system and forming droplets that flow back. These droplets are difficult to be carried away by the flue gas, thus affecting the atomization effect.

[0046] This utility model proposes a smoke exhaust device 100, which aims to improve the atomization efficiency and effect of the smoke exhaust device 100.

[0047] Reference Figure 1 , Figure 2 , Figure 4 and Figure 12 In one embodiment of this utility model, the smoke exhaust device 100 includes a collection hood 10, a smoke exhaust pipe 20, and an atomizing module 30. The collection hood 10 is provided with an atomizing chamber 103 for collecting condensate, the atomizing chamber 103 having a first sidewall 1031, and the first sidewall 1031 having an air inlet 1032; the smoke exhaust pipe 20 is disposed on the collection hood 10 and communicates with the atomizing chamber 103; the atomizing module 30 is disposed on the collection hood 10, the atomizing module 30 is used to atomize the condensate in the atomizing chamber 103, and the atomizing center line of the atomizing module 30 is offset from the air inlet center line of the air inlet 1032.

[0048] For ease of understanding, the smoke exhaust device 100 is used as an example in a water heater. Of course, this smoke exhaust device 100 can also be used in other devices that require simultaneous smoke exhaust and drainage. For example... Figure 1 As shown, the water heater may include a water heater body 200 and a flue gas exhaust device 100. The collection port 1011 of the flue gas exhaust device 100 is positioned facing the water heater body 200. The flue gas and condensate generated during the operation of the water heater body 200 flow to the flue gas exhaust device 100 through the collection port 1011. Specifically, the water heater body 200 may include a fan 210, a burner 220, a combustion chamber housing, and a heat exchanger 230. A flue is formed inside the combustion chamber housing that connects the burner 220 and the heat exchanger 230. The collection hood 10 of the flue gas exhaust device 100 is located above the heat exchanger 230, and the collection port 1011 of the flue gas exhaust device 100 faces the heat exchanger 230. When the water heater is working, driven by the fan 210, the high-temperature flue gas generated by the combustion of the burner 220 is transported to the heat exchanger 230 through the flue inside the combustion chamber. The high-temperature flue gas exchanges heat with the heat exchanger 230 to heat the water inside the heat exchanger 230. The flue gas after heat exchange flows to the exhaust device 100 through the collection port 1011. At the same time, the condensate generated during the operation of the water heater body 200 (for example, condensate will form on the surface of the heat exchanger 230 after heat exchange with the flue gas, or condensate will form in other lower-temperature parts inside the water heater body 200 when in contact with the flue gas) also flows to the exhaust device 100 through the collection port 1011.

[0049] In this embodiment, the collection hood 10 may be provided with a collection chamber 101, a purification chamber 102, and an atomizing chamber 103. The collection chamber 101 has a collection port 1011 for introducing flue gas and condensate. The collection chamber 101 is connected to the purification chamber 102 and the atomizing chamber 103 respectively. The bottom wall of the collection chamber 101 is provided with a communication port 1012 that communicates with the purification chamber 102. The atomizing chamber 103 has a first side wall 1031, and the first side wall 1031 is provided with an air inlet 1032 that communicates with the collection chamber 101. The exhaust pipe 20 is connected to the collection hood 10. The exhaust pipe 20 is provided with an inlet 201, an exhaust port 202, and an exhaust channel 203 that connects the inlet 201 and the exhaust port 202. The inlet 201 communicates with the atomizing chamber 103. Flue gas flows through the collection chamber 101 and the atomization chamber 103 to the exhaust channel 203, and is finally discharged from the exhaust port 202 of the exhaust channel 203. Condensate flows through the collection chamber 101 to the purification chamber 102, where it is purified before being output to the atomization chamber 103. The atomization module 30 then atomizes the condensate in the atomization chamber 103, allowing it to be discharged through the exhaust channel 203 to the exhaust port 202. The collection hood 10 and the exhaust pipe 20 can be integrally formed or assembled as separate parts. For example, the collection hood 10 and the exhaust pipe 20 can be integrally stretched from sheet metal, or they can be integrally injection molded from plastic parts. Alternatively, the collection hood 10 and the exhaust pipe 20 can be separate parts, assembled using flanges, screws, clips, or other structures. Furthermore, the collection hood 10 and the exhaust pipe 20 can also be fixed by welding. No specific limitations are specified here.

[0050] The technical solution of this utility model collects flue gas and condensate in the collection hood 10. The flue gas flows through the atomizing chamber 103 to the exhaust pipe 20 and is finally discharged from the exhaust pipe 20. The condensate, after being atomized by the atomizing module 30, can be discharged with the flue gas through the exhaust pipe 20, thus simultaneously achieving the functions of exhausting flue gas and condensate. Furthermore, the atomizing chamber 103 has a first sidewall 1031, and the first sidewall 1031 is provided with an air inlet 1032. The air inlet centerline of the air inlet 1032 is offset from the atomization centerline of the atomizing module 30. The atomization centerline of the atomizing module 30 refers to the centerline of the atomized beam emitted by the atomizing module 30, at which the atomized airflow is maximum. The air inlet centerline of the air inlet 1032 refers to the center position of the air inlet 1032. By ensuring that the atomization centerline of the atomization module 30 does not coincide with the air inlet centerline of the air inlet 1032, the influence of the airflow entering through the air inlet 1032 on the atomization process can be significantly reduced, making the atomization more uniform and stable. This also helps to improve the airflow distribution within the entire atomization chamber 103, promoting better discharge of condensate particles with the airflow, effectively improving the atomization efficiency and effect of the exhaust device 100. At the same time, it reduces the direct impact of strong winds on the atomization bundle generated by the atomization module 30, reducing the potential internal water accumulation problem caused by droplet backflow, thereby improving the operational reliability and service life of the water heater.

[0051] like Figure 1 As shown, in one embodiment, the first sidewall 1031 is provided with a baffle 40, which covers part of the air inlet 1032. The projection of the atomizing module 30 toward the baffle 40 falls into the baffle 40 so as to be offset from the air inlet 1032.

[0052] In this embodiment, the baffle 40 can help change the airflow direction entering the atomizing chamber 103, avoid directly impacting the atomizing module 30, reduce the interference of the airflow entering from the air inlet 1032 on atomization, so that the atomizing module 30 can work stably and generate finer and more evenly distributed water mist particles, thereby improving the overall atomization efficiency and effect. In addition, the baffle 40 also has a guiding function, which can make the airflow more evenly distributed in the atomizing chamber 103, which is conducive to the better carrying and discharge of condensed water particles by the airflow.

[0053] like Figure 2 and Figure 3 As shown, in one embodiment, on the projection plane perpendicular to the atomization center line of the atomization module 30 and in the air intake direction perpendicular to the air inlet 1032, the atomization module 30 and the air inlet 1032 are staggered.

[0054] In this embodiment, by staggering the atomizing module 30 and the air inlet 1032, the airflow entering from the air inlet 1032 will not directly impact the atomized bundle generated by the atomizing module 30, reducing the dispersion of the atomized bundle caused by strong winds. At the same time, it reduces the interference of the airflow entering from the air inlet 1032 on atomization, enabling the atomizing module 30 to work more stably and produce finer and more uniform water mist particles, thereby improving the overall atomization efficiency.

[0055] like Figure 4 and Figure 5 As shown, in one embodiment, the first sidewall 1031 is provided with a guide surface 1033, which extends from the air inlet 1032 toward the atomizing module 30.

[0056] In this embodiment, the guide surface 1033 is located inside the atomization chamber 103, extending from the air inlet 1032 towards the atomization centerline of the atomization module 30. The guide surface 1033 can guide the airflow entering from the air inlet 1032 along a predetermined path, reducing turbulence and irregular flow, and making the airflow flow more smoothly towards the atomization centerline. This helps to improve the uniformity of the mixing between atomized particles and airflow, and reduces the situation where atomized water droplets are blown away due to direct impact from excessively fast wind speeds. In addition, a stable and well-directed airflow helps to improve the atomization quality, allowing condensate to be atomized more finely and uniformly, and thus more easily discharged with the flue gas.

[0057] like Figure 4 and Figure 5 As shown, in one embodiment, the atomizing chamber 103 has a highest water level position P, and the lowest position of the guide surface 1033 is level with the highest water level position P.

[0058] It should be noted that the highest water level P refers to the water level of the condensate in the atomizing chamber 103. When the condensate in the atomizing chamber 103 accumulates to the highest water level P, if the lowest point of the guide surface 1033 is level with the highest water level P, it can ensure that the airflow entering from the air inlet 1032 can flow smoothly from the guide surface 1033 to the highest water level P, mixing with the atomized particles, thereby improving the overall atomization efficiency and effect.

[0059] like Figure 4 and Figure 5 As shown, in one embodiment, the exhaust pipe 20 is provided with an inlet 201 that communicates with the atomizing chamber 103. The atomizing chamber 103 has a highest water level position P. The distance s between the highest water level position P and the plane where the inlet 201 is located is greater than the height h of the atomized beam emitted by the atomizing module 30.

[0060] In this embodiment, by limiting the distance *s* between the highest water level *P* of the atomizing chamber 103 and the plane containing the smoke inlet 201 to be greater than the height *h* of the atomized beam emitted by the atomizing module 30, this arrangement ensures that the atomized beam generated by the atomizing module 30 has sufficient space to mix with the flue gas entering from the air inlet 1032. This increases the probability that condensate particles are carried away and discharged by the flue gas. Simultaneously, it also helps reduce droplet rebound or backflow caused by the atomized beam directly impacting the smoke inlet 201. It is understood that the height *h* of the atomized beam emitted by different atomizing modules 30 will be different. For example, if the height *h* of the atomized beam emitted by the atomizing module 30 is 50 mm, then the distance *s* between the highest water level *P* of the atomizing chamber 103 and the plane containing the smoke inlet 201 will be greater than 50 mm.

[0061] like Figure 6 As shown, in one embodiment, the smoke exhaust device 100 further includes a liquid level detection module 50, which is used to detect the liquid level in the atomizing chamber 103; the atomizing module 30 is used to turn on or off according to the signal fed back by the liquid level detection module 50.

[0062] In this embodiment, the liquid level detection module 50 can detect the liquid level in the atomizing chamber 103, and the atomizing module 30 can be turned on or off according to the liquid level in the atomizing chamber 103 to avoid the atomizing module 30 from dry burning when the liquid level in the atomizing chamber 103 is too low, or the atomizing module 30 from not atomizing in time when the liquid level in the atomizing chamber 103 is too high. When applied to a water heater, the liquid level detection module 50 and the atomizing module 30 can be electrically connected to the water heater's control system 300. When the liquid level in the atomizing chamber 103 is higher than the first preset liquid level H1, the control system 300 controls the atomizing module 30 to start, so as to atomize the condensate in the atomizing chamber 103; when the liquid level in the atomizing chamber 103 is higher than the second preset liquid level H2, the control system 300 issues an alarm signal and shuts down the water heater, so that the water heater no longer produces condensate. In this way, the liquid level in the atomizing chamber 103 can be prevented from rising further and flowing back into the combustion chamber of the water heater, thus providing overall protection. The liquid level detection module 50 can be a contact liquid level sensor (such as a differential pressure liquid level sensor, a float-type liquid level sensor, a capacitive liquid level sensor, etc.) or a non-contact liquid level sensor (such as an ultrasonic liquid level sensor, a laser liquid level sensor, etc.).

[0063] like Figure 6As shown, in one embodiment, the liquid level detection module 50 includes a float 51 and a Hall sensor 52. The float 51 is provided with a magnetic component. The bottom wall of the atomizing chamber 103 is provided with an upwardly extending fixing post 53. The top of the fixing post 53 is provided with a limiting member 54. The float 51 is movably fitted onto the fixing post 53. The Hall sensor 52 is located at the end of the fixing post 53 away from the limiting member 54.

[0064] In this embodiment, a magnet is wrapped inside the float 51. The movement of the float 51 can drive the magnet to move relative to the Hall sensor 52 to generate a changing magnetic field. The Hall sensor 52 is electrically connected to the control system 300 to send a sensing signal to the control system 300. The control system 300 then controls the working state of the atomizer or water heater according to the sensing signal. The first preset liquid level is the first sensing point, and the second preset liquid level is the second sensing point. When the liquid level in the atomizing chamber 103 reaches or exceeds the first preset liquid level, the float 51 moves upward along the fixed column 53 under the action of buoyancy and moves away from the first sensing point. After receiving the signal that it has moved away from the first sensing point, the control system 300 controls the atomizer to start. The atomizer atomizes the condensate in the atomizing chamber 103 and discharges it with the flue gas. When the liquid level in the atomizing chamber 103 reaches the second preset liquid level, the float 51 also rises to the second sensing point under the action of buoyancy and stops rising under the limit of the limiting member 54 (such as the limiting rubber plug). After receiving the signal of the second sensing point, the control system 300 issues a high water level alarm signal and shuts down the water heater to prevent the liquid level from rising further and flowing back into the combustion chamber of the water heater, thus playing a role in protecting the whole machine.

[0065] like Figure 7 As shown, in one embodiment, the atomizing module 30 includes a first atomizer 31 and a second atomizer 32, which are disposed at intervals within the atomizing chamber 103.

[0066] In this embodiment, by setting up a first atomizer 31 and a second atomizer 32, the atomization amount of condensed water per unit time can be significantly increased, thereby improving the overall atomization efficiency. The alternating arrangement of the first atomizer 31 and the second atomizer 32 helps to distribute the atomized micro-droplets more evenly, allowing these droplets to mix better with the smoke and be effectively discharged, reducing the risk of droplet backflow or deposition within the atomization chamber 103. Furthermore, by setting up the first atomizer 31 and the second atomizer 32, the redundancy of the smoke exhaust device 100 can be enhanced. This means that if one atomizer malfunctions, for example, the first atomizer 31, the second atomizer 32 can still continue to operate, ensuring that the atomization function of the smoke exhaust device 100 is not affected. The working status of each atomizer can be controlled individually according to actual needs. For example, when the amount of condensate in the atomization chamber 103 is small, only one atomizer can be started to save energy, while when the amount of condensate in the atomization chamber 103 is large, two atomizers can be started at the same time to improve the atomization processing capacity.

[0067] To improve atomization effect and efficiency, such as Figure 7 As shown, in one embodiment, the first atomizer 31 and the second atomizer 32 are arranged side by side and spaced apart along a first direction, and the minimum distance d between the first atomizer 31 and the second atomizer 32 in the first direction is not less than 10 mm.

[0068] In this embodiment, the first atomizer 31 and the second atomizer 32 are arranged side by side and spaced apart along the first direction, and the minimum distance d between the first atomizer 31 and the second atomizer 32 in the first direction is not less than 10 mm, wherein the first direction is the radial direction of the atomization chamber 103. This ensures that there is enough space between the first atomizer 31 and the second atomizer 32 to avoid them interfering with each other, improve the stability and reliability of the entire smoke exhaust device 100, and also facilitates a more uniform distribution of condensate during the atomization process, and reduces local airflow turbulence caused by the two atomizers being too close together.

[0069] like Figure 8 As shown, in one embodiment, the overlapping area S12 of the atomization cross-sections of the first atomizer 31 and the second atomizer 32 is not greater than one-third of the total atomization cross-sectional area of ​​the first atomizer 31 and the second atomizer 32.

[0070] In this embodiment, the atomizing cross-sectional area of ​​the first atomizer 31 is defined as S1, the atomizing cross-sectional area of ​​the second atomizer 32 is defined as S2, and the overlapping area of ​​the atomizing cross-sections of the first atomizer 31 and the second atomizer 32 is defined as S12. The overlapping area S12 of the atomizing cross-sections of the first atomizer 31 and the second atomizer 32 is not greater than one-third of the sum of the atomizing cross-sectional areas S1 and S2 of the first atomizer 31. This limitation can prevent atomized particles from being too concentrated in one area, thereby ensuring that the atomized bundles generated by each atomizer can diffuse sufficiently instead of overlapping, thus improving the overall atomization effect and efficiency.

[0071] like Figures 9 to 11 As shown, in one embodiment, the atomizing chamber 103 has a second sidewall 1034 opposite to the first sidewall 1031 along a first direction. The bottom wall of the atomizing chamber 103 is provided with a first mounting surface 301 for mounting the first atomizer 31 and a second mounting surface 302 for mounting the second atomizer 32. The first mounting surface 301 and the second mounting surface 302 are respectively located on both sides of the axis of the atomizing chamber 103. The first mounting surface 301 is inclined downward from the axis of the atomizing chamber 103 toward the first sidewall 1031, and the second mounting surface 302 is inclined downward from the axis of the atomizing chamber 103 toward the second sidewall 1034.

[0072] In this embodiment, by tilting the first mounting surface 301 and the second mounting surface 302 towards the first sidewall 1031 and the second sidewall 1034 respectively, the condensate can be effectively guided to flow along a predetermined path, thereby reducing water accumulation and preventing condensate from accumulating near the first atomizer 31 and the second atomizer 32, improving atomization efficiency and preventing damage to the atomizers. Furthermore, the tilted mounting surfaces allow the atomized jet generated by the atomizer to be sprayed at a certain angle, which not only increases the opportunity for atomized particles to contact the airflow but also reduces the possibility of direct impact on the sidewalls, thereby improving the overall atomization effect.

[0073] like Figure 10 and Figure 11 As shown, in one embodiment, the angle a1 between the first mounting surface 301 and the horizontal plane is not greater than 5 degrees; and / or, the angle a2 between the second mounting surface 302 and the horizontal plane is not greater than 5 degrees.

[0074] In this embodiment, the angle α1 between the first mounting surface 301 and the horizontal plane is no greater than 5 degrees, and the angle α2 between the second mounting surface 302 and the horizontal plane is no greater than 5 degrees. By limiting the angles between the first mounting surface 301 and the second mounting surface 302 and the horizontal plane to no greater than 5 degrees, it means that these mounting surfaces have only a slight inclination relative to the horizontal plane. This ensures that the condensate can flow smoothly along a preset path, rather than accumulating rapidly or forming turbulence. This helps the atomized droplets to be more evenly distributed in the airflow, thereby improving the overall atomization efficiency. In addition, the small inclination angle of the mounting surfaces is also beneficial for daily maintenance, because the condensate in the atomization chamber 103 will not flow at high speed, which can reduce the impact of the condensate on the atomization chamber 103 and improve the life of the smoke exhaust device 100.

[0075] like Figure 1 As shown, in one embodiment, the collection hood 10 is further provided with a collection chamber 101 and a purification chamber 102. The collection chamber 101 and the purification chamber 102 are located on one side of the atomizing chamber 103 along the lateral direction. The collection chamber 101 is located above the purification chamber 102. The top of the collection chamber 101 is provided with a collection port 1011 for introducing flue gas and condensate. The collection chamber 101 is connected to the atomizing chamber 103 through a connecting port 1012. The purification chamber 102 is connected to the atomizing chamber 103 through an air inlet 1032, so as to purify the condensate and output it to the atomizing chamber 103.

[0076] In this embodiment, the collection hood 10 introduces the flue gas and condensate generated during the operation of the water heater body 200 through the collection port 1011. The flue gas flows through the collection chamber 101 and the atomizing chamber 103 to the exhaust channel 203, and is finally discharged from the exhaust port 202 of the exhaust channel 203. The condensate flows through the collection chamber 101 to the purification chamber 102, where it is purified and then output to the atomizing chamber 103. The atomizing module 30 then atomizes the condensate in the atomizing chamber 103, allowing the atomized condensate to be discharged through the exhaust channel 203 to the exhaust port 202. That is, the condensate is first purified in the purification chamber 102 before entering the atomizing chamber 103 for atomization, which avoids impurities in the condensate from affecting the atomizing module 30, improves the atomization effect, and extends the service life of the atomizing module 30.

[0077] like Figure 1 , Figure 12 and Figure 13As shown, this utility model also proposes a water heater, which includes a water heater body 200 and a flue gas exhaust device 100. The collection port 1011 of the flue gas exhaust device 100 faces the water heater body 200, and the flue gas and condensate generated by the operation of the water heater body 200 flow to the flue gas exhaust device 100 through the collection port 1011. The specific structure of the flue gas exhaust device 100 is as described in the above embodiments. Since this water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0078] Specifically, the water heater in question is a gas water heater, which can be either a forced-draft type or a forced-blowing type.

[0079] like Figure 1 , Figure 12 and Figure 13 As shown, in one embodiment, the water heater body 200 includes a fan 210, a burner 220, and a heat exchanger 230 arranged from top to bottom. The collection hood 10 of the exhaust device 100 is located below the heat exchanger 230, and the collection port 1011 of the exhaust device 100 faces the heat exchanger 230. The fan 210 is used to drive airflow from top to bottom through the burner 220 and the heat exchanger 230 to the exhaust device 100. The water heater also includes a control system 300 electrically connected to the fan 210. The fan 210 is also used to identify whether the air inlet 1032 of the exhaust device 100 is blocked according to the wind pressure, and to send a fault signal to the control system 300 when the air inlet 1032 is blocked.

[0080] In this embodiment, the water heater is specifically a forced-draft gas water heater with inverted combustion. The water heater includes a casing, and components such as a water heater body 200 and a gas proportional valve disposed within the casing. The water heater body 200 includes, from top to bottom, a fan 210, a burner 220, a combustion chamber housing, and a heat exchanger 230. The fan 210 and the gas proportional valve are located at the top of the burner 220 and communicate with it. The gas proportional valve controls the amount of gas supplied to the burner 220. The fan 210 supplies secondary air to the burner 220 and simultaneously drives the airflow along the water heater body 200 from top to bottom to the exhaust device 100. The collection hood 10 of the exhaust device 100 is located below the heat exchanger 230. The collection port 1011 of the collection hood 10 faces the heat exchanger 230. The exhaust pipe 20 is arranged horizontally (e.g., left and right) on one side of the water heater body 200. The exhaust pipe 20 extends upward from the top of the collection hood 10. The exhaust pipe 20 has an exhaust port 202, one end of which extends out of the shell.

[0081] When the water heater is running, driven by the fan 210, the high-temperature flue gas generated by the combustion of the burner 220 flows downward along the flue inside the combustion chamber to the heat exchanger 230. The high-temperature flue gas exchanges heat with the heat exchanger 230 to heat the water inside the heat exchanger 230. After heat exchange, the flue gas flows further downward to the collection chamber 101 located below the heat exchanger 230, and is finally discharged from the exhaust port 202 of the exhaust passage 203. After heat exchange, condensate will form on the surface of the heat exchanger 230. Under the action of gravity, the condensate drips from the collection port 1011 into the collection chamber 101. The condensate then flows through the collection port 1011 into the collection chamber 101, where it is atomized by the atomizing module 30. This atomized condensate is then carried by the flue gas through the exhaust channel 203 to the exhaust port 202 for discharge. Thus, both exhaust and condensate discharge functions can be achieved simultaneously. Furthermore, the atomizing chamber 103 has a first sidewall 1031, which is provided with an air inlet 1032. The airflow centerline is offset from the atomization centerline of the atomization module 30, meaning the atomization centerline of the atomization module 30 does not coincide with the air inlet centerline of the air inlet 1032. This significantly reduces the impact of the airflow entering through the air inlet 1032 on the atomization process, resulting in more uniform and stable atomization. It also helps improve the airflow distribution within the entire atomization chamber 103, promoting better discharge of condensate particles with the airflow. Simultaneously, it reduces the direct impact of strong winds on the atomization bundle generated by the atomization module 30, reducing potential internal water accumulation problems due to droplet backflow, thereby improving the operational reliability and service life of the water heater. Furthermore, driven by the fan 210, the flue gas flows downwards, and the flue gas flow direction is consistent with the dripping direction of condensate on the surface of the heat exchanger 230. The blowing of the flue gas accelerates the dripping of condensate, preventing a large amount of condensate from adhering to the surface of the heat exchanger 230 and forming a water film that affects heat exchange efficiency. This improves the heat exchange efficiency of the water heater.

[0082] It is important to note that if the atomizing module 30 malfunctions or atomization is not timely, the water level of the condensate in the atomizing chamber 103 will continue to rise. When the water level rises and overflows the air inlet 1032, it will cause the air inlet 1032 to become blocked (i.e., a water seal is formed). At this time, the flue gas in the collection chamber 101 cannot flow from the air inlet 1032 to the atomizing chamber 103, resulting in a blockage of the air duct. This leads to an increase in the air pressure of the water heater. The fan 210 identifies the blockage of the air inlet 1032 based on the air pressure and determines that it is an atomization failure. It then feeds back the atomization failure signal to the water heater's control system 300. The control system 300 controls the entire unit to stop working to prevent the unit from continuing to operate and generating condensate, which would cause the water level to continue to rise and flow back into the water heater's fan 210, burner 220, heat exchanger 230, and other components, thus preventing the entire unit from malfunctioning.

[0083] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A smoke evacuation device, characterized in that, The device comprises: a collecting cover provided with an atomizing cavity for collecting condensed water, the atomizing cavity being provided with a first side wall provided with an air inlet; a smoke exhaust pipe provided in the collecting cover and communicating with the atomizing cavity; and an atomizing module provided in the collecting cover and used for atomizing the condensed water in the atomizing cavity, the atomizing center line of the atomizing module being offset from the air inlet center line of the air inlet. In a projection plane perpendicular to the atomizing center line of the atomizing module and in a direction perpendicular to the air inlet direction of the air inlet, the atomizing module and the air inlet are arranged in a staggered manner.

2. The smoke evacuating device of claim 1, wherein The first side wall is provided with a baffle covering part of the air inlet, and a projection of the atomizing module towards the baffle falls within the baffle to be staggered with the air inlet. The first side wall is provided with a flow guide surface extending from the air inlet towards the atomizing module.

3. The smoke evacuating device of claim 1, wherein The atomizing cavity has a highest water level position, and the lowest position of the flow guide surface is level with the highest water level position.

4. The smoke evacuating device of claim 3, wherein The smoke exhaust pipe is provided with a smoke inlet communicating with the atomizing cavity, the atomizing cavity has a highest water level position, and the distance between the highest water level position and the plane where the smoke inlet is located is greater than the height of the atomized beam emitted by the atomizing module.

5. The smoke evacuating device of claim 1, wherein The smoke exhaust device further comprises a liquid level detection module for detecting the liquid level in the atomizing cavity, and the atomizing module is used to be turned on or off according to the signal fed back by the liquid level detection module.

6. The smoke evacuating device of claim 1, wherein The liquid level detection module comprises a floating ball and a Hall sensor, the floating ball is provided with a magnetic part, the bottom wall of the atomizing cavity is provided with a fixed column extending upwards, the top of the fixed column is provided with a limiting part, the floating ball is movably sleeved on the fixed column, and the Hall sensor is arranged at the end of the fixed column away from the limiting part.

7. The smoke evacuation device of claim 6, wherein, The atomizing module comprises a first atomizer and a second atomizer, and the first atomizer and the second atomizer are arranged in the atomizing cavity in a spaced manner.

8. The smoke evacuating device of claim 1, wherein The first atomizer and the second atomizer are arranged in a side-by-side and spaced manner along a first direction, and in the first direction, the minimum distance between the first atomizer and the second atomizer is not less than 10 mm.

9. The smoke evacuation device of claim 8, wherein, The first atomizer and the second atomizer have an overlapping area of atomizing cross section, and the overlapping area of atomizing cross section is not greater than one third of the total atomizing cross section area of the first atomizer and the second atomizer. The atomizing cavity has a second side wall opposite to the first side wall along the first direction, the bottom wall of the atomizing cavity is provided with a first mounting surface for mounting the first atomizer and a second mounting surface for mounting the second atomizer, the first mounting surface and the second mounting surface are arranged on both sides of the axis of the atomizing cavity, the first mounting surface is arranged to be inclined downward from the axis of the atomizing cavity towards the first side wall, and the second mounting surface is arranged to be inclined downward from the axis of the atomizing cavity towards the second side wall.

10. The smoke evacuating device of claim 8, wherein The angle between the first mounting surface and the horizontal plane is not greater than 5 degrees.

11. The smoke evacuating device of claim 10, wherein The angle between the second mounting surface and the horizontal plane is not greater than 5 degrees. ​ 12. The smoke exhaust apparatus of any one of claims 1 to 11, wherein The collecting cover is further provided with a collecting cavity and a purifying cavity, the collecting cavity and the purifying cavity are located at one side of the atomizing cavity in the transverse direction, the collecting cavity is located above the purifying cavity, the top of the collecting cavity is provided with a collecting opening for introducing flue gas and condensed water, the collecting cavity is communicated with the atomizing cavity through a communication opening, and the purifying cavity is communicated with the atomizing cavity through the air inlet, so as to output the purified condensed water to the atomizing cavity.

13. A water heater, characterized by The water heater comprises a water heater body and the smoke exhaust device as claimed in any one of claims 1 to 12, the water heater body comprises a fan, a burner and a heat exchanger arranged from top to bottom, the collecting cover of the smoke exhaust device is located below the heat exchanger, the collecting opening of the smoke exhaust device faces the heat exchanger, the fan is used to drive airflow to flow from top to bottom through the burner and the heat exchanger to the smoke exhaust device, the water heater further comprises a control system electrically connected with the fan, and the fan is further used to identify whether the air inlet of the smoke exhaust device is blocked according to air pressure and send a fault signal to the control system when the air inlet is blocked.

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