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, the collecting cover is provided with a collecting cavity and an atomizing cavity which are communicated with each other, the collecting cavity is provided with a collecting port used for introducing smoke and condensate water, and a mounting position used for mounting an atomizing module is arranged in the atomizing cavity; the smoke exhaust pipe is connected with the collection cover, and the smoke exhaust pipe is provided with a smoke exhaust port and a smoke exhaust channel for communicating the smoke exhaust port with the atomization cavity; the flow guide part is arranged on the collecting cover, and the flow guide part is used for guiding smoke to the smoke exhaust pipe; according to the smoke exhaust device, when smoke flows into the atomization cavity from the collection cavity and is exhausted through the smoke exhaust pipe, flow of the smoke can be guided through the flow guide piece, so that wind resistance of flowing of the smoke is reduced, the flow speed of the smoke during smoke exhaust of the smoke exhaust device can be guaranteed, and the smoke exhaust device has good condensate water exhaust and smoke exhaust effects.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, and particularly relates to an exhaust device and a water heater. Background Art

[0002] Under the background of energy conservation and emission reduction, improving the energy efficiency of water heaters has become a trend in the industry. Conventional condensing gas water heaters generally achieve high energy efficiency by utilizing the latent heat of vaporization of flue gas. However, a large amount of condensed water is generated during the process of utilizing the latent heat of vaporization of flue gas. In related technologies, some exhaust devices of water heaters are provided with independent atomization chambers for atomizing the condensed water collected by the exhaust device and discharging it along with the flue gas. However, when the exhaust device is provided with an independent atomization chamber, it will cause a large wind resistance to the flue gas flowing inside the exhaust device, affecting the flow rate of the flue gas and the condensed water when discharging. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose an exhaust device and a water heater, aiming to ensure the flow rate of the flue gas when the exhaust device discharges smoke.

[0004] To achieve the above purpose, the exhaust device proposed by the utility model includes:

[0005] A collection hood, the collection hood is provided with a collection chamber and an atomization chamber that communicate with each other, and the collection chamber has a collection port for introducing flue gas and condensed water;

[0006] An exhaust pipe, the exhaust pipe is connected to the collection hood, the exhaust pipe is provided with an exhaust port, and an exhaust passage that communicates the exhaust port with the atomization chamber; and

[0007] A flow guide member, which is arranged in the collection hood, and the flow guide member is used to guide the flue gas to the exhaust pipe.

[0008] In an embodiment, the flow guide member includes a first flow guide pipe, the first flow guide pipe is arranged between the collection chamber and the atomization chamber and is used to communicate the collection chamber with the atomization chamber, and the first flow guide pipe has a first flue gas flow guide channel that extends obliquely from the collection hood towards the exhaust pipe.

[0009] In an embodiment, the first flue gas flow guide channel has a first through port communicating with the collection chamber and a second through port communicating with the atomization chamber, and the collection chamber has a flow guide surface opposite to the collection port, and the flow guide surface extends obliquely from the side of the collection port away from the first flue gas flow guide channel to the lower edge of the first through port.

[0010] In one embodiment, the smoke exhaust passage is located above the atomization chamber. The first flue gas diversion passage extends upwardly and obliquely from the first opening towards the second opening, and the connection portion between the diversion surface and the lower edge of the first opening is provided with an arc transition.

[0011] In one embodiment, the diversion member includes a second diversion pipe. The second diversion pipe is disposed in the atomization chamber and extends along the axial direction of the smoke exhaust pipe. A second flue gas diversion passage is formed between the second diversion pipe and the inner wall of the atomization chamber, and the second flue gas diversion passage communicates the collection chamber with the smoke exhaust passage.

[0012] In one embodiment, the second flue gas diversion passage has a first flue gas diversion section and a second flue gas diversion section that are interconnected. The second flue gas diversion section is disposed at one end of the first flue gas diversion section close to the smoke outlet. A guiding surface is formed at the portion where the outer wall of the second diversion pipe is in contact with the first flue gas diversion section, and the guiding surface is arranged to converge towards the axis of the second diversion pipe from one end far from the smoke outlet to the other end.

[0013] In one embodiment, the second diversion pipe has a first pipe section and a second pipe section. The second pipe section is connected to one end of the first pipe section close to the smoke outlet. The first pipe section and the atomization chamber enclose the first flue gas diversion section, and the second pipe section and the atomization chamber enclose the second flue gas diversion section. One end of the first pipe section far from the smoke outlet is connected to the inner wall of the atomization chamber.

[0014] In one embodiment, the collection chamber has a bottom wall disposed opposite to the collection port. The bottom wall is disposed on the side of the collection chamber close to the atomization chamber, and one end of the first pipe section far from the smoke outlet is connected to the bottom wall.

[0015] In one embodiment, an atomization diversion passage communicating the atomization chamber with the smoke exhaust passage is formed in the second diversion pipe. The atomization chamber is provided with an installation position for installing an atomization module, and the installation position is correspondingly arranged at one end of the atomization diversion passage far from the smoke exhaust passage.

[0016] In one embodiment, the atomization diversion passage has a first atomization diversion section and a second atomization diversion section that are interconnected. The second atomization diversion section is disposed at one end of the first atomization diversion section close to the smoke outlet, and the first atomization diversion section is arranged to gradually expand from one end close to the smoke outlet to the other end.

[0017] In one embodiment, the smoke exhaust pipe includes a smoke exhaust section and an introduction section that are interconnected. The smoke exhaust section and the introduction section are sequentially distributed from the smoke outlet to the collection hood, and the introduction section is arranged to gradually expand from the smoke outlet to the atomization chamber.

[0018] The present utility model also provides a water heater, which includes a water heater body and the smoke exhaust device as described above. The collection port of the smoke exhaust device faces the water heater body, and the flue gas and condensate generated during the operation of the water heater body flow towards the smoke exhaust device through the collection port.

[0019] The technical solution of the present utility model is to provide a collection hood with a collection chamber and an atomization chamber, and a smoke exhaust pipe connected to the atomization chamber. The flue gas and condensate are introduced into the collection chamber through the collection port of the collection chamber, and then flow from the collection chamber into the atomization chamber. An atomization module is installed at the installation position of the atomization chamber to atomize the condensate. The atomized condensate can be discharged together with the flue gas through the smoke exhaust pipe. When the flue gas flows from the collection chamber into the atomization chamber and is discharged through the smoke exhaust pipe, the flow of the flue gas can be guided by a flow guiding member to reduce the wind resistance of the flue gas flow, so as to ensure the flue gas flow rate during the smoke exhaust of the smoke exhaust device, and enable the smoke exhaust device to have a good effect of discharging condensate and smoke. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the water heater provided by the present utility model;

[0022] Figure 2 It is a schematic structural diagram of an embodiment of the smoke exhaust device provided by the present utility model;

[0023] Figure 3 It is a schematic structural diagram of another embodiment of the smoke exhaust device provided by the present utility model;

[0024] Figure 4 For Figure 3 an isometric sectional view of the smoke exhaust device in

[0025] Explanation of the Reference Numerals in the Drawings:

[0026] 100, Smoke exhaust device; 10, Collection hood; 101, Collection chamber; 1011, Collection port; 1012, Third communication port; 102, Atomization chamber; 11, Deflection surface; 12, Installation position; 13, Bottom wall; 20, Smoke exhaust pipe; 21, Smoke exhaust section; 22, Introduction section; 201, Smoke exhaust opening; 202, Smoke exhaust channel; 30, First diversion pipe; 301, First flue gas diversion channel; 3011, First communication port; 3012, Second communication port; 40, Second diversion pipe; 41, First pipe section; 42, Second pipe section; 401, Second flue gas diversion channel; 401a, First flue gas diversion section; 401b, Second flue gas diversion section; 402, Atomization diversion channel; 402a, First atomization diversion section; 402b, Second atomization diversion section; 4021, Second diversion opening; 4022, First diversion opening; 200, Water heater body; 210, Burner; 220, Combustion chamber box; 230, Heat exchanger; 300, Fan.

[0027] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if the descriptions such as "first", "second", etc. are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their 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 at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0031] Under the background of energy conservation and emission reduction, improving the energy efficiency of water heaters has become a trend in the industry. Traditional condensing gas water heaters generally achieve high energy efficiency by utilizing the latent heat of vaporization of flue gas, but a large amount of condensed water will be generated during the process of utilizing the latent heat of vaporization of flue gas. In related technologies, some smoke exhaust devices of water heaters are provided with independent atomization chambers for atomizing the condensed water collected by the smoke exhaust devices and discharging it along with the flue gas. However, when the smoke exhaust device is provided with an independent atomization chamber, it will cause a large wind resistance to the flue gas flowing inside the smoke exhaust device, affecting the flow velocity of the flue gas and the condensed water when discharging.

[0032] The present utility model proposes a smoke exhaust device 100.

[0033] Please refer to Figures 2 to 4 , in an embodiment of the present utility model, the smoke exhaust device 100 includes a collection hood 10, a smoke exhaust pipe 20, and a flow guiding member. The collection hood 10 is provided with a collection chamber 101 and an atomization chamber 102 that communicate with each other. The collection chamber 101 has a collection port 1011 for introducing flue gas and condensed water; the smoke exhaust pipe 20 is connected to the collection hood 10, the smoke exhaust pipe 20 is provided with a smoke exhaust port 201, and a smoke exhaust channel 202 that communicates the smoke exhaust port 201 with the atomization chamber 102; the flow guiding member is disposed in the collection hood 10, and the flow guiding member is used to guide the flue gas to the smoke exhaust pipe 20.

[0034] For the sake of easy understanding, the application of the smoke exhaust device 100 to a water heater is taken as an example for illustration. Of course, the smoke exhaust device 100 can also be used in other devices that require simultaneous smoke exhaust and drainage. Combining Figure 1 as shown, the water heater includes a water heater body 200 and a smoke exhaust device 100. The collection port 1011 of the smoke exhaust device 100 faces the water heater body 200, and the flue gas and condensed water generated during the operation of the water heater body 200 flow to the smoke exhaust device 100 through the collection port 1011.

[0035] Among them, the water heater body 200 may include a burner 210, a combustion chamber box 220, and a heat exchanger 230. A flue that communicates the burner 210 with the heat exchanger 230 is formed inside the combustion chamber box 220. When the water heater is operating, driven by the blower 300, the high-temperature flue gas generated by the combustion of the burner 210 is transported to the heat exchanger 230 through the flue inside the combustion chamber box 220, and heat exchange is performed with the heat exchanger 230, so that the water in the heat exchanger 230 can be heated. The flue gas after heat exchange flows to the smoke exhaust device 100 through the collection port 1011. At the same time, the condensed water generated when the water heater body 200 operates (for example, condensed water will be generated on the surface of the heat exchanger 230 after heat exchange with the flue gas, or condensed water will be generated on the surface of other parts with lower temperatures inside the water heater body 200 when they come into contact with it) also flows to the smoke exhaust device 100 through the collection port 1011.

[0036] In the present utility model, the installation position 12 is used to install the atomization module in the atomization chamber 102. The installation position 12 can be set at the bottom of the collection chamber 101, or in the middle of the collection chamber 101, or at other positions of the collection chamber 101, which is not limited here. When the condensed water flows from the collection chamber 101 to the atomization chamber 102, the atomization module in the atomization chamber 102 atomizes the condensed water, so that the atomized condensed water is discharged through the smoke exhaust channel 202 and the smoke exhaust port 201. Among them, the collection cover 10 and the smoke exhaust pipe 20 can be an integrally formed structure, or a split structure can be adopted and then assembled. Optionally, for the sake of simplifying the manufacturing process, the smoke exhaust pipe 20 and the collection cover 10 are integrally formed. For example, the collection cover 10 and the smoke exhaust pipe 20 can be integrally formed by stretching sheet metal parts, or the collection cover 10 and the smoke exhaust pipe 20 can be integrally injection molded by plastic parts. Of course, the collection cover 10 and the smoke exhaust pipe 20 can also be separately provided and then assembled and connected through structures such as flanges, screws, buckles or other structures. In addition, the collection cover 10 and the smoke exhaust pipe 20 can also be fixed by welding. Specific limitations are not made here.

[0037] In the present utility model, since the collection hood 10 includes a collection chamber 101 and an atomization chamber 102 that are interconnected, and the exhaust pipe 20 is connected to the atomization chamber 102, a tee connection is adopted among the collection chamber 101, the atomization chamber 102, and the exhaust pipe 20. When the flue gas enters the collection chamber 101 from the collection port 1011 and flows into the atomization chamber 102 through the collection chamber 101, the wind resistance is relatively large, and there is a situation of air volume loss. For this reason, the present utility model is provided with a flow guiding member for guiding the flue gas flowing into the collection chamber 101 to the exhaust pipe 20 to reduce the wind resistance from the collection chamber 101 to the exhaust pipe 20. Among them, the flow guiding member can be arranged between the atomization chamber 102 and the collection chamber 101 for connecting the atomization chamber 102 and the collection chamber 101 and for guiding the flue gas from the collection chamber 101 to the atomization chamber 102. Or the flow guiding member can be arranged in the atomization chamber 102 and extend towards the inside of the collection chamber 101, so that the flue gas flowing from the collection chamber 101 to the atomization chamber 102 flows into the atomization chamber 102 along the flow guiding member, so as to reduce the wind resistance of the flue gas flow. Or, the flow guiding member is arranged in the collection chamber 101 and extends to the atomization chamber 102 to divert the flue gas flowing from the collection chamber 101 to the atomization chamber 102 into the atomization chamber 102. The specific setting position of the flow guiding member is not limited here.

[0038] The technical solution of the present utility model is to provide a collection hood 10 having a collection chamber 101 and an atomization chamber 102, and an exhaust pipe 20 connected to the atomization chamber 102. The flue gas and condensate are introduced into the collection chamber 101 through the collection port 1011 of the collection chamber 101 and flow from the collection chamber 101 into the atomization chamber 102. When the flue gas flows from the collection chamber 101 into the atomization chamber 102 and is discharged through the exhaust pipe 20, the flow of the flue gas can be guided by the flow guiding member to reduce the wind resistance of the flue gas flow, so as to ensure the flue gas flow rate when the exhaust device 100 is exhausting, and enable the exhaust device 100 to have a good effect of discharging condensate and exhausting flue gas.

[0039] Refer to Figure 2 As shown, in an embodiment of the present utility model, the flow guiding member includes a first flow guiding pipe 30. The first flow guiding pipe 30 is arranged between the collection chamber 101 and the atomization chamber 102 and is used for connecting the collection chamber 101 and the atomization chamber 102. The first flow guiding pipe 30 has a first flue gas guiding channel 301 that extends obliquely from the collection hood 10 towards the exhaust pipe 20.

[0040] Since the smoke has a high temperature and a low density, and is driven to flow by the fan 300, the overall flow direction of the smoke is from the collection chamber 101 into the atomization chamber 102, and then into the smoke exhaust channel 202, with an overall flow trend from bottom to top. In this way, when the first guide pipe 30 is set, and the first smoke guide channel 301 extending obliquely from the collection cover 10 toward the smoke exhaust pipe 20 is set, the smoke flows obliquely upward along the first smoke guide channel 301, so that when the smoke enters the atomization chamber 102 through the collection chamber 101, it does not enter in parallel and then bend to enter the smoke exhaust channel 202, but enters obliquely upward, which is basically the same as the overall flow direction of the smoke, and the smoke will not be subject to greater resistance, thereby reducing the flow resistance of the smoke from the collection chamber 101 into the atomization chamber 102.

[0041] In an embodiment of the present utility model, the first smoke guide channel 301 has a first opening 3011 connected to the collecting chamber 101, and a second opening 3012 connected to the atomization chamber 102, and the collecting chamber 101 has a guide surface 11 arranged opposite to the collecting opening 1011, and the guide surface 11 extends obliquely from a side of the collecting opening 1011 away from the first smoke guide channel 301 to the lower edge of the first opening 3011.

[0042] With such a configuration, firstly, the condensed water flowing into the collection chamber 101 can be guided by the guide surface 11, so that the condensed water flows more smoothly along the guide surface 11 into the atomization chamber 102. Secondly, when the smoke flows from the collection port 1011 to the first opening 3011, it can also flow along the guide surface 11, so that the guide surface 11 can guide the flow of the smoke.

[0043] See also Figure 2 In an embodiment of the utility model, the smoke exhaust channel 202 is located above the atomization chamber 102, the first smoke guide channel 301 is extended upwardly and obliquely from the first opening 3011 toward the second opening 3012, and the connecting portion between the guide surface 11 and the lower edge of the first opening 3011 is arranged in an arc transition.

[0044] Such a configuration makes the connection between the guide surface 11 and the first opening 3011 smoother, and the transition between the two will not have a large sharp corner transition. When the smoke flows from the collecting port 1011 to the first opening 3011, it can flow along the guide surface 11 and flow along the arc transition surface at the end of the guide surface 11 to the first opening 3011, enter the first smoke guide channel 301 from the first opening 3011, and flow toward the smoke exhaust channel 202 in an inclined upward direction. The entire flow process of the smoke from the collecting port 1011 to the smoke exhaust channel 202 is very smooth, which can effectively reduce the loss of smoke flow speed.

[0045] See also Figure 3 As shown, in an embodiment of the utility model, the guide member includes a second guide pipe 40, which is arranged in the atomization chamber 102, and the second guide pipe 40 is extended axially along the smoke exhaust pipe 20. A second smoke guide channel 401 is formed between the second guide pipe 40 and the inner wall of the atomization chamber 102, and the second smoke guide channel 401 connects the collection chamber 101 and the smoke exhaust channel 202.

[0046] In the above-mentioned embodiment, a second guide tube 40 is arranged in the atomizing chamber 102, and a second smoke guide channel 401 is formed by enclosing the second guide tube 40 and the inner wall of the atomizing chamber 102, and the second smoke guide channel 401 connects the collecting chamber 101 and the smoke exhaust channel 202, so that the smoke flowing from the collecting chamber 101 to the smoke exhaust channel 202 can be directly guided through the second smoke guide channel 401, rather than first entering the atomizing chamber 102 through the collecting chamber 101 and then entering the smoke exhaust channel 202 through the atomizing chamber 102, thereby avoiding the smoke flow rate loss caused by the large wind resistance encountered in the process of the smoke flowing from the collecting chamber 101 into the atomizing chamber 102.

[0047] In addition, in other embodiments, the second guide tube 40 can also be arranged inside the collecting chamber 101, so that the second guide tube 40 extends obliquely upward from the collecting chamber 101 to the atomizing chamber 102, and one end of the second guide tube 40 located in the atomizing chamber 102 is facing the smoke exhaust channel 202, so that smoke diversion can also be achieved.

[0048] See also Figure 3 , Figure 4 As shown, the second smoke guide channel 401 has a first smoke guide section 401a and a second smoke guide section 401b which are interconnected, and the second smoke guide section 401b is arranged at one end of the first smoke guide section 401a close to the smoke exhaust port 201, and a guide surface is formed at the portion where the outer wall of the second guide pipe 40 and the first smoke guide section 401a are connected, and the guide surface is arranged to be close to the axis of the second guide pipe 40 from one end away from the smoke exhaust port 201 to the other end.

[0049] Among them, the guiding surface is arranged to approach the axis of the second diversion pipe 40 from one end far away from the smoke exhaust port 201 to the other end. It can be that the guiding surface approaches the axis of the second diversion pipe 40 from bottom to top. In this way, when the flue gas enters the first flue gas diversion section 401a from the collection chamber 101, since the flue gas flows from the collection chamber 101 to the atomization chamber 102 and has a flowing tendency towards the atomization chamber 102, the setting of the first flue gas diversion section 401 enables it to flow obliquely upwards along the position close to the center of the second diversion pipe 40 from bottom to top, approaching the flowing tendency towards the atomization chamber 102, and can buffer the flow rate of the flue gas entering the second flue gas diversion channel 401, reducing the wind resistance encountered by the flue gas in the second flue gas diversion channel 401, so as to avoid reducing the flow rate of the flue gas entering the smoke exhaust channel 202.

[0050] Continue to refer to Figure 3 , an atomization diversion channel 402 communicating the atomization chamber 102 with the smoke exhaust channel 202 is formed in the second diversion pipe 40. The atomization chamber 102 is provided with an installation position 12 for installing an atomization module, and the installation position 12 is correspondingly arranged at one end of the atomization diversion channel 402 far away from the smoke exhaust channel 202.

[0051] In the present utility model, the second diversion pipe 40 has a first diversion port 4022 facing the smoke exhaust channel 202 and a second diversion port 4021 facing the installation position 12. Since the atomization diversion channel 402 is arranged inside the second flue gas diversion channel 401, and the second flue gas diversion channel 401 is formed on the outer peripheral side of the second diversion pipe 40, when the flue gas flows along the second flue gas diversion channel 401 towards the smoke exhaust channel 202, a diversion drive towards the smoke exhaust channel 202 can be formed on the outer periphery of the second diversion pipe 40, so that the fluid in the atomization diversion channel 402 has a driving force towards the smoke exhaust channel 202. With such a setting, after the condensed water in the atomization chamber 102 is atomized, it can be accelerated to flow into the smoke exhaust channel 202 through the guidance of the flue gas flow in the second flue gas diversion channel 401, realizing the effect of diverting the atomized condensed water.

[0052] Optionally, a connecting portion communicating the second flue gas diversion channel 401 and the atomization diversion channel 402 is provided on the outer periphery of the second diversion pipe 40. The connecting portion may be a plurality of connecting holes arranged at intervals, or may be a long connecting groove. The connecting portion may be provided at the lower end of the second diversion pipe 40 or at a position close to the middle of the second diversion pipe 40. In this way, the condensed water in the collection cavity 101 can flow from the connecting portion into the atomization cavity 102, rather than flowing from the upper port of the second diversion pipe 40 into the atomization cavity 102 through the atomization diversion channel 402. Thereby, it is possible to avoid the accumulation of condensed water in the second flue gas diversion channel 401, resulting in the blockage of the second flue gas diversion channel 401 and affecting the diversion of flue gas. At the same time, it also avoids the condensed water flowing from top to bottom through the atomization diversion channel 402 into the atomization cavity 102 and hindering the flow rate of the atomized condensed water flowing out from bottom to top through the atomization diversion channel 402.

[0053] Continue to refer to Figure 3 、 Figure 4 In the embodiment of the present invention, the atomization diversion channel 402 has a first atomization diversion section 402a and a second atomization diversion section 402b that communicate with each other. The second atomization diversion section 402b is provided at one end of the first atomization diversion section 402a close to the smoke exhaust port 201. The first atomization diversion section 402a is gradually expanded from one end close to the smoke exhaust port 201 to the other end.

[0054] In the above embodiment, the second atomization diversion section 402b and the first atomization diversion section 402a are arranged vertically. Such a setting, on the one hand, can make the upper end portion of the second diversion pipe 40 narrower and the portion where the second diversion pipe 40 is connected to the atomization cavity 102 wider, so that the second diversion pipe 40 can define the second flue gas diversion channel 401 with the inner wall of the atomization cavity 102, and the first flue gas diversion section 401a of the second flue gas diversion channel 401 is arranged to approach the axis line of the second diversion pipe 40 from one end far from the smoke exhaust port 201 to the other end. On the other hand, it can also make the first atomization diversion section 402a of the atomization diversion channel 402 have a large opening at the lower end and a small opening at the upper end, so that the atomization diversion channel 402 can converge and accelerate the atomized condensed water flowing through it, increasing the flow rate of the atomized condensed water flowing out of the atomization cavity 102.

[0055] Continue to refer to Figure 3 、 Figure 4, in the embodiment of the present utility model, the second diversion pipe 40 has a first pipe section 41 and a second pipe section 42. The second pipe section 42 is connected to one end of the first pipe section 41 close to the smoke exhaust port 201. A first flue gas diversion section 401a is formed by enclosing between the first pipe section 41 and the atomization chamber 102. A second flue gas diversion section 401b is formed by enclosing between the second pipe section 42 and the atomization chamber 102. One end of the first pipe section 41 away from the smoke exhaust port 201 is connected to the inner wall of the atomization chamber 102.

[0056] It can be understood that due to the arrangement of the first flue gas diversion section 401a and the first atomization diversion section 402a, the first pipe section 41 is arranged in a gradually expanding manner from the smoke exhaust port 201 to the atomization chamber 102. The gradually expanding arrangement here can specifically be a gradually expanding trumpet-shaped flaring or a step-shaped flaring with a sudden change. By dividing the second diversion pipe 40 into the first pipe section 41 and the second pipe section 42, the first pipe section 41 is arranged in a gradually expanding manner. The flue gas flowing from the collection chamber 101 to the second flue gas diversion channel 401 can enter the second flue gas diversion channel 401 along a trajectory flowing obliquely upward along the outer peripheral wall of the second diversion pipe 40. When the flue gas flows from the collection chamber 101 into the second flue gas diversion channel 401, it will not change direction through a connection transition part with a sudden change, thereby effectively reducing the wind resistance of the flue gas flowing from the collection chamber 101 into the second flue gas diversion channel 401. And the first pipe section 41 is connected to the inner wall of the atomization chamber 102, avoiding some flue gas from flowing into other positions of the atomization chamber 102 instead of flowing from the second flue gas diversion channel 401 to the smoke exhaust pipe 20, resulting in a loss of flow rate.

[0057] Continue to refer to Figure 3 , Figure 4 , in the embodiment of the present utility model, the collection chamber 101 has a bottom wall 13 arranged opposite to the collection port 1011. The bottom wall 13 is arranged on one side of the collection chamber 101 close to the atomization chamber 102. One end of the first pipe section 41 away from the smoke exhaust port 201 is connected to the bottom wall 13.

[0058] In the above embodiment, a third through port 1012 is provided at the connection between the collection chamber 101 and the atomization chamber 102. The third through port 1012 is formed at one end of the bottom wall 13 close to the smoke exhaust pipe 20. One end of the second diversion pipe 40 away from the smoke exhaust port 201 is connected to the lower edge of the third through port 1012.

[0059] It is understandable that the end of the second guide tube 40 away from the smoke outlet 201 is connected to the lower edge of the third opening 1012, which can be achieved by welding one end of the second guide tube 40 to the bottom wall 13 close to the end of the smoke exhaust pipe 20, or the second guide tube 40 is integrally formed with the collection cover 10, and there is a smooth transition between the second guide tube 40 and the third opening 1012. In this way, when the smoke enters the second smoke guide channel 401 from the collection chamber 101, the smoke can all enter the second smoke guide channel 401 and flow to the smoke exhaust channel 202 through the second smoke guide channel 401, which can prevent part of the smoke from flowing into other positions of the atomization chamber 102 and flowing back and forth in the atomization chamber 102, resulting in a decrease in flow rate.

[0060] See also Figure 2 , Figure 3 As shown, in an embodiment of the present utility model, the smoke exhaust pipe 20 includes a smoke exhaust section 21 and an introduction section 22 which are interconnected. The smoke exhaust section 21 is arranged at one end of the introduction section 22 away from the atomization chamber 102, and the introduction section 22 is gradually expanded from the smoke exhaust port 201 to the atomization chamber 102.

[0061] In this embodiment, the introduction section 22 is in the shape of a trumpet that gradually expands toward the atomization chamber 102, and the smoke exhaust section 21 is in the shape of a straight cylinder that extends vertically. The expanded end of the introduction section 22 is connected to the atomization chamber 102, and the smoke exhaust section 21 is connected to the narrow end of the introduction section 22. The inner diameter of the introduction section 22 is gradually expanded toward the atomization chamber 102, which is conducive to increasing the atomization space and guiding the smoke, so that the airflow entering the narrow smoke exhaust section 21 through the wider introduction section 22 can be gathered and accelerated, so that the atomized condensed water and smoke can enter the smoke exhaust channel 202 more smoothly.

[0062] See also Figure 1 As shown, the utility model also proposes a water heater, which includes a water heater body 200 and a smoke exhaust device 100. The specific structure of the smoke exhaust device 100 refers to the above embodiment. Since the water heater adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the collection port 1011 of the smoke exhaust device 100 faces the water heater body 200, and the smoke and condensed water generated by the operation of the water heater body 200 flow to the smoke exhaust device 100 through the collection port 1011.

[0063] In the above embodiment, the water heater specifically relates to a gas water heater, which can be a forced-drawing gas water heater or a forced-drum gas water heater. Hereinafter, the forced-drum gas water heater will be mainly used as an example for explanation.

[0064] In an embodiment of the present utility model, the water heater body 200 includes a burner 210, a combustion chamber box body 220, and a heat exchanger 230 which are arranged in sequence from top to bottom. The collection hood 10 of the smoke exhaust device 100 is located below the heat exchanger 230, and the collection port 1011 faces the heat exchanger 230. The water heater further includes a blower 300 communicated with the burner 210, and the blower 300 is used to drive air flow to flow downward through the water heater body 200 to the smoke exhaust device 100.

[0065] In this embodiment, the water heater can be a forced-draft gas water heater with an inverted combustion. The water heater includes a housing, and components such as a water heater body 200, a blower 300, and a gas proportional valve arranged in the housing. The water heater body 200 includes a burner 210, a combustion chamber box body 220, and a heat exchanger 230 which are arranged in sequence from top to bottom. The blower 300 and the gas proportional valve are arranged on the top of the burner 210 and communicated with the burner 210. The gas amount introduced into the burner 210 can be controlled through the gas proportional valve. The blower 300 can supply secondary air to the burner 210 and at the same time drive air flow to flow downward along the water heater body 200 to the smoke exhaust device 100. The collection hood 10 of the smoke exhaust device 100 is located below the heat exchanger 230, and the collection port 1011 of the collection hood 10 faces the heat exchanger 230. The smoke exhaust pipe 20 is arranged on one side of the water heater body 200 in the horizontal direction (such as the left-right direction), and the smoke exhaust pipe 20 extends upward from the top of the collection hood 10, and one end of the smoke exhaust pipe 20 provided with a smoke exhaust port 201 penetrates out of the housing.

[0066] When the water heater is operating, driven by the blower 300, the high-temperature flue gas generated by the combustion of the burner 210 flows downward along the flue inside the combustion chamber box body 220 to the heat exchanger 230, and the high-temperature flue gas exchanges heat with the heat exchanger 230 to heat the water flow inside the heat exchanger 230. The flue gas after heat exchange further flows downward into the collection chamber 101 located below the heat exchanger 230 and is finally discharged from the smoke exhaust port 201 of the smoke exhaust passage 202. Condensate will be generated on the surface of the heat exchanger 230 after heat exchange, and the condensate drips into the collection chamber 101 through the collection port 1011 under the action of gravity. The condensate flows into the atomization chamber 102 through the collection chamber 101 and is atomized by the atomization module arranged at the installation position 12. The atomized condensate enters the smoke exhaust passage 202 along with the flow of the flue gas and can be discharged through the smoke exhaust passage 202 along with the flue gas to the smoke exhaust port 201. Since there is a guiding member to guide the flow of the flue gas, when the flue gas flows from the collection chamber 101 into the smoke exhaust passage 202, the resistance encountered is small, so the flow velocity loss is small, which makes it more convenient for the atomized condensate to be discharged along with the flue gas, realizing the functions of simultaneously exhausting smoke and discharging condensate.

[0067] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A smoke exhaust device, characterized in that: include: A collecting hood, wherein the collecting hood is provided with a collecting chamber and an atomizing chamber which are interconnected, and the collecting chamber has a collecting port for introducing smoke and condensed water; A smoke exhaust pipe, the smoke exhaust pipe is connected to the collecting hood, the smoke exhaust pipe is provided with a smoke exhaust port, and a smoke exhaust channel connecting the smoke exhaust port with the atomizing chamber; as well as A flow guide is provided on the collecting hood, and is used to guide the smoke to the smoke exhaust pipe.

2. The smoke exhaust device according to claim 1, characterized in that: The guide member includes a first guide pipe, which is arranged between the collection chamber and the atomization chamber and is used to connect the collection chamber and the atomization chamber. The first guide pipe has a first smoke guide channel extending obliquely from the collection cover toward the smoke exhaust pipe.

3. The smoke exhaust device according to claim 2, characterized in that: The first smoke guide channel has a first opening connected to the collecting chamber, and a second opening connected to the atomizing chamber. The collecting chamber has a guide surface arranged opposite to the collecting opening. The guide surface extends obliquely from a side of the collecting opening away from the first smoke guide channel to the lower edge of the first opening.

4. The smoke exhaust device according to claim 3, characterized in that: The smoke exhaust channel is located above the atomizing chamber, the first smoke guide channel extends upwardly and obliquely from the first opening toward the second opening, and the connecting portion between the guide surface and the lower edge of the first opening is arranged in an arc transition.

5. The smoke exhaust device according to claim 1, characterized in that: The guide member includes a second guide pipe, which is arranged in the atomization chamber. The second guide pipe is extended axially along the smoke exhaust pipe. A second smoke guide channel is formed between the second guide pipe and the inner wall of the atomization chamber. The second smoke guide channel connects the collection chamber and the smoke exhaust channel.

6. The smoke exhaust device according to claim 5, characterized in that: The second smoke guide channel comprises a first smoke guide section and a second smoke guide section which are interconnected. The second smoke guide section is arranged at one end of the first smoke guide section close to the smoke exhaust port. A guide surface is formed at a portion where the outer wall of the second guide pipe connects with the first smoke guide section. The guide surface is arranged to be close to the axis of the second guide pipe from one end away from the smoke exhaust port to the other end.

7. The smoke exhaust device according to claim 6, characterized in that: The second guide pipe has a first pipe section and a second pipe section, the second pipe section is connected to one end of the first pipe section close to the smoke exhaust port, the first pipe section and the atomization chamber are enclosed to form the first smoke guide section, the second pipe section and the atomization chamber are enclosed to form the second smoke guide section, and one end of the first pipe section away from the smoke exhaust port is connected to the inner wall of the atomization chamber.

8. The smoke exhaust device according to claim 7, characterized in that: The collecting chamber has a bottom wall arranged opposite to the collecting port, the bottom wall is arranged on a side of the collecting chamber close to the atomizing chamber, and one end of the first pipe section away from the smoke exhaust port is connected to the bottom wall.

9. The smoke exhaust device according to claim 5, characterized in that: An atomizing guide channel connecting the atomizing chamber and the smoke exhaust channel is formed in the second guide tube. The atomizing chamber is provided with a mounting position for mounting an atomizing module. The mounting position is correspondingly arranged at one end of the atomizing guide channel away from the smoke exhaust channel.

10. The smoke exhaust device according to claim 9, characterized in that: The atomization guide channel comprises a first atomization guide section and a second atomization guide section which are interconnected. The second atomization guide section is arranged at one end of the first atomization guide section close to the smoke exhaust port. The first atomization guide section is gradually expanded from one end close to the smoke exhaust port to the other end.

11. The smoke exhaust device according to any one of claims 1 to 10, characterized in that: The smoke exhaust pipe comprises a smoke exhaust section and an introduction section which are interconnected. The smoke exhaust section is arranged at one end of the introduction section away from the atomization chamber. The introduction section is gradually expanded from the smoke exhaust port to the atomization chamber.

12. A water heater, characterized in that: It comprises a water heater body and a smoke exhaust device as claimed in any one of claims 1 to 11, wherein a collecting port of the smoke exhaust device faces the water heater body, and smoke and condensed water generated by the operation of the water heater body flow to the smoke exhaust device through the collecting port.

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