Smoke cap assembly and gas water heater comprising same

Abstract

The utility model provides a smoke cap assembly and a gas water heater comprising the same. The smoke cap assembly comprises a smoke cap which comprises a pipe body and a cap body, the side wall of the pipe body is provided with an air outlet, and the cap body is provided with a first cambered surface; the flow guide part is provided with a flow guide groove, the bottom wall of the flow guide groove is a second cambered surface, and an opening is formed in the second side wall of the flow guide groove; a circulation gap is formed between the flow guide piece and the base, and the circulation gap is communicated with the open hole and the smoke pipe; wherein the smoke cap can leave the initial position of the smoke cap under the action of smoke to move forwards in the axial direction relative to the flow guide piece, so that the air outlet is opened; under the action of the first elastic piece, the first elastic piece reversely moves in the axial direction relative to the flow guide piece and returns to the initial position of the smoke cap; and external airflow enters the diversion trench along the first cambered surface of the cap body and then enters the open hole along the second cambered surface of the diversion trench. By arranging the specific structure of the smoke cap assembly, the external air pressure and the smoke exhaust thrust are treated in a distinguished mode, smoke exhaust is facilitated, and meanwhile the downdraft prevention capacity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of smoke cap assemblies and gas water heater comprising it. BACKGROUND

[0002] The existing anti-wind smoke cap for gas water heater is the plane structure of two blades, the plane structure of two blades cannot distinguish the external wind pressure and the exhaust smoke thrust of gas water heater, the external wind pressure and exhaust smoke pressure form collision, need to use the power of fan of gas water heater to forcibly exhaust smoke, leading to poor anti-wind capability. SUMMARY

[0003] The utility model solves the technical problem to overcome the defect of the structure of the anti-wind smoke cap in the prior art, and provides a smoke cap assembly and a gas water heater comprising the same.

[0004] The utility model solves the above technical problem by the following technical scheme:

[0005] A kind of smoke cap assembly, the smoke cap assembly is set to the end of the smoke pipe of gas water heater, it is characterized in that, it includes:

[0006] Smoke cap, the smoke cap includes cap body and pipe body connected in sequence along the axial direction, the pipe body includes oppositely arranged first end and second end along the axial direction, the first end of the pipe body is communicated with the smoke pipe, gas outlet is set on the side wall of the pipe body, the cap body is covered in the second end of the pipe body, and the side of the cap body along the axial direction away from the pipe body is the first camber surface projecting in the direction away from the smoke pipe;

[0007] Flow guide piece, the flow guide piece is provided with installation port, the first end of the pipe body is installed in the installation port by first elastic member, the flow guide piece is provided with the flow guide groove recessed in the direction away from the pipe body along the outer periphery of the installation port, the bottom wall of the flow guide groove is the second camber surface recessed in the direction close to the smoke pipe, the flow guide groove includes oppositely arranged first side wall and second side wall connected at two ends of second camber surface, the first side wall is close to the installation port, the second side wall is away from the installation port, and the second side wall is provided with opening hole;

[0008] Base, the flow guide piece is installed in the base, and the end close to the smoke pipe between the flow guide piece and the base forms flow-through gap, and the flow-through gap is communicated with the opening hole and the smoke pipe;

[0009] The smoke cap can move along the axial direction relative to the flow guide in a positive direction under the action of the flue gas discharged by the gas water heater to open the air outlet; after the smoke cap moves away from the initial position of the smoke cap, the smoke cap moves along the axial direction relative to the flow guide in a reverse direction under the action of the first elastic member to return to the initial position of the smoke cap for closing the air outlet; after the external airflow enters the flow guide groove along the first arc surface of the cap body, the external airflow enters the opening of the second arc surface of the flow guide groove.

[0010] In the technical solution, the first arc surface protruding away from the smoke pipe is arranged to disperse the pressure of the external airflow, and the first arc surface and the second arc surface recessed toward the smoke pipe are arranged to guide the external airflow. Only a small part of the external airflow can enter the smoke pipe through the opening of the second side wall of the flow guide groove to collide with the flue gas of the gas water heater. The flue gas thrust of the gas water heater is concentrated on the smoke cap and is discharged through the air outlet on the pipe body of the smoke cap. Therefore, the external wind pressure and the flue gas thrust are distinguished and processed, the pressure of the external wind pressure and the flue gas thrust is reduced, the flue gas is easily discharged, the anti-backup wind capability is improved, and the normal combustion of the gas water heater is ensured. When the gas water heater is not working, that is, under the action of no flue gas thrust, the smoke cap is reset to the initial position of the smoke cap for closing the air outlet under the action of the first elastic member, so that the impurities entering the gas water heater are reduced.

[0011] Preferably, the smoke cap assembly further comprises a second elastic member, and the second elastic member is located between the base and the flow guide.

[0012] The flow guide moves along the axial direction relative to the base in a reverse direction under the action of the external airflow to reduce the flow area of the flow-through gap; after the flow guide moves away from the initial position of the flow guide, the flow guide moves along the axial direction relative to the base in a positive direction under the action of the second elastic member to return to the initial position of the flow guide.

[0013] In the technical solution, the second elastic member is arranged to reset the flow guide after the flow guide moves away from the initial position of the flow guide. The flow guide is arranged to move along the axial direction relative to the base in a reverse direction under the action of the external airflow to reduce the flow area of the flow-through gap. Therefore, as the wind pressure increases, the flow area of the flow-through gap is smaller, and the resistance of the external airflow is greater, so that the external airflow is more difficult to enter the gas water heater.

[0014] Preferably, the flow guide comprises a flow guide extension extending along the axial direction toward the base, and the flow guide extension is arranged at the outer periphery of the flow guide groove.

[0015] The base comprises a main body and a base extension part, the base extension part is arranged along the outer periphery of the main body and extends along the axial direction to the extension part of the flow guide, the extension part of the flow guide and the base extension part have a non-zero distance along the axial direction;

[0016] The main body and the outer surface of the bottom wall of the flow guide groove form the flow gap, the outer surface of the second side wall of the flow guide groove, the extension part of the flow guide and the base extension part form a flow space, the flow space communicates with the opening and the flow gap, and the opening and the flow gap are arranged on one side of the flow space close to the central axis of the smoke cap assembly along the axial direction.

[0017] In the technical solution, the external airflow enters the flow space and then passes through the flow gap, so that the impurities in the external airflow are blocked, and the impurities are prevented from entering the smoke pipe.

[0018] Preferably, the outer side of the first end of the pipe body is provided with a limiting protrusion, the limiting protrusion extends outward along the radial direction of the pipe body; the limiting protrusion cooperates with the periphery of the mounting port to limit the pipe body from being separated from the mounting port of the flow guide.

[0019] The two ends of the first elastic member along the axial direction abut against the limiting protrusion and the outer periphery of the mounting port, respectively.

[0020] In the technical solution, the limiting protrusion is arranged to limit the pipe body from being separated from the mounting port of the flow guide, and to provide a mounting position for the first elastic member.

[0021] Preferably, the outer diameter of the cap body is greater than the outer diameter of the pipe body, and the outer diameter of the flow guide groove is greater than the outer diameter of the cap body; and / or,

[0022] The side of the cap body along the axial direction towards the pipe body is a third arc surface protruding away from the smoke pipe.

[0023] In the technical solution, the outer diameter of the cap body is greater than the outer diameter of the pipe body, and the outer diameter of the flow guide groove is greater than the outer diameter of the cap body, so that the external airflow can be effectively introduced into the flow guide groove, and the smoke discharged from the air outlet on the side wall of the pipe body is prevented from colliding with the external airflow; the side of the cap body along the axial direction towards the pipe body is a third arc surface protruding away from the smoke pipe, so that the smoke discharge thrust can be effectively gathered.

[0024] Preferably, the number of air outlets is greater than or equal to four and is an even number, and the plurality of air outlets are equidistantly arranged along the circumferential direction of the pipe body.

[0025] In the technical solution, the number of the gas outlets is greater than or equal to four and is an even number, and the plurality of gas outlets are equidistantly arranged along the circumference of the pipe body, so that the smoke exhaust thrust can be effectively balanced, and the force borne by the smoke cap is balanced.

[0026] Preferably, the shape of the gas outlet is rectangular; and / or,

[0027] The total area of the plurality of gas outlets is 80%-90% of the area of the circumferential region of the side wall of the pipe body on which the gas outlets are arranged.

[0028] In the technical solution, the shape of the gas outlet is limited to be rectangular, so that the adjustment of the smoke exhaust area can be directly realized by adjusting the size of the rectangle, and the adjustment of the smoke exhaust area can be more conveniently realized compared with other shapes. By limiting the total area of the plurality of gas outlets to be within the percentage range of the area of the circumferential region of the side wall of the pipe body on which the gas outlets are arranged, on the one hand, the total area of the gas outlets is prevented from being too small to affect the smoke exhaust area, and on the other hand, the total area of the gas outlets is prevented from being too large to affect the support strength of the pipe body.

[0029] Preferably, the number of the openings is greater than or equal to four and is an even number, and the plurality of openings are equidistantly arranged along the circumference of the second side wall of the flow guide groove.

[0030] In the technical solution, the number of the openings is limited to be greater than or equal to four and is an even number, and the plurality of openings are equidistantly arranged along the circumference of the second side wall of the flow guide groove, so that the external airflow entering the openings can be effectively balanced, and the force borne by the flow guide member is balanced.

[0031] Preferably, the shape of the opening is circular; and / or,

[0032] The total area of the plurality of openings is 40%-60% of the area of the circumferential region of the second side wall of the flow guide groove on which the openings are arranged.

[0033] In the technical solution, the shape of the opening is limited to be circular, so that the noise caused by the airflow being blocked when the external airflow enters the opening is avoided to the greatest extent. By limiting the total area of the plurality of openings to be within the percentage range of the area of the circumferential region of the second side wall of the flow guide groove on which the openings are arranged, the intake area of the external airflow and the structural strength of the flow guide groove are better balanced.

[0034] A gas water heater, characterized in that the gas water heater comprises the smoke cap assembly as described above.

[0035] The positive progress effect of the utility model lies in that:

[0036] This invention utilizes a unique overall structure for the smoke cap assembly. Specifically, a first arc surface protruding away from the flue disperses the pressure of the external airflow. This first arc surface, along with a second arc surface recessed towards the flue, guides the external airflow. Only a small portion of the external airflow enters the flue through the opening in the second sidewall of the guide channel, colliding with the exhaust gas from the gas water heater. The exhaust thrust of the gas water heater is concentrated on the smoke cap and discharged through the outlet on the cap's body. This effectively separates and processes external wind pressure and exhaust thrust, reducing the pressure of the opposing forces. This facilitates flue gas removal while improving backdraft prevention, ensuring normal combustion of the gas water heater. Furthermore, when the gas water heater is not operating (i.e., without exhaust thrust), the smoke cap returns to its initial position with the outlet closed under the action of a first elastic element, reducing the entry of impurities into the gas water heater. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of a cigarette cap assembly according to a preferred embodiment of the present invention.

[0038] Figure 2 This is a three-dimensional exploded view of a preferred embodiment of the cigarette cap assembly of this utility model.

[0039] Figure 3 This is a cross-sectional view of a preferred embodiment of the cigarette cap assembly of this utility model.

[0040] Figure 4 This is a schematic diagram of the external airflow and smoke flow direction in a preferred embodiment of the cigarette cap assembly of this utility model.

[0041] Figure 5 This is a cross-sectional view of a preferred embodiment of the cigarette cap of the present invention.

[0042] Figure 6 This is a cross-sectional structural schematic diagram of the guide component according to a preferred embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures

[0044] Smoking cap component 1

[0045] Smoking cap 10

[0046] Cap body 11

[0047] First arc surface 111

[0048] Third arc surface 113

[0049] Tube body 12

[0050] First end 121

[0051] Second end 122

[0052] gas outlet 123

[0053] limiting protrusion 124

[0054] flow guide 20

[0055] mounting port 21

[0056] flow guide groove 22

[0057] bottom wall 221

[0058] first side wall 222

[0059] second side wall 223

[0060] aperture 224

[0061] flow guide extension 23

[0062] base 30

[0063] main body 31

[0064] base extension 32

[0065] flow passage gap 41

[0066] flow passage space 42

[0067] first elastic member 50

[0068] axial direction P

[0069] central axis p

[0070] radial direction R

[0071] outer diameter d1 of the cap

[0072] outer diameter d2 of the tube

[0073] outer diameter d3 of the flow guide groove

[0074] circumferential region A of the side wall of the tube where the gas outlet is arranged

[0075] circumferential region B of the second side wall of the flow guide groove where the aperture is arranged DETAILED DESCRIPTION

[0076] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the present application are within the scope of protection of the present application.

[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0078] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0079] As shown in Figures 1-6 A smoke cap assembly 1 is disclosed, which is arranged at the end of a smoke pipe of a gas water heater. The smoke cap assembly 1 comprises a smoke cap 10, a flow guide 20 and a base 30 arranged in sequence along an axial direction P.

[0080] The smoke cap 10 comprises a cap body 11 and a pipe body 12 connected in sequence along the axial direction P, the pipe body 12 comprises a first end 121 and a second end 122 arranged oppositely along the axial direction P, the first end 121 of the pipe body 12 communicates with the smoke pipe, a gas outlet 123 is formed on the side wall of the pipe body 12, the cap body 11 is arranged on the second end 122 of the pipe body 12, and the side of the cap body 11 away from the pipe body 12 along the axial direction P is a first arc surface 111 protruding away from the smoke pipe.

[0081] The flow guide 20 is provided with a mounting hole 21, and the first end 121 of the pipe body 12 is mounted on the mounting hole 21 through a first elastic member 50. The flow guide 20 is provided with a flow guide groove 22 along the outer periphery of the mounting hole 21, which is recessed away from the pipe body 12. The bottom wall 221 of the flow guide groove 22 is a second arc surface recessed towards the smoke pipe. The flow guide groove 22 comprises a first side wall 222 and a second side wall 223 oppositely arranged at two ends of the second arc surface. The first side wall 222 is arranged close to the mounting hole 21, and the second side wall 223 is arranged away from the mounting hole 21. The second side wall 223 is provided with an opening 224.

[0082] The flow guide 20 is mounted on the base 30, and a flow gap 41 is formed between the end of the flow guide 20 close to the smoke pipe and the base 30. The flow gap 41 is connected to the opening 224 and the smoke pipe.

[0083] The smoke cap 10 is moved in the positive direction along the axial direction P relative to the flow guide 20 under the action of the flue gas discharged by the gas water heater to open the gas outlet 123. After the smoke cap 10 moves away from the initial position of the smoke cap, the smoke cap 10 is moved in the reverse direction along the axial direction P relative to the flow guide 20 under the action of the first elastic member 50 to return to the initial position of the smoke cap to close the gas outlet 123. After the external airflow enters the flow guide groove 22 along the first arc surface 111 of the cap body 11, the external airflow enters the opening 224 along the second arc surface of the flow guide groove 22.

[0084] In this way, by setting the overall structure of the smoke cap assembly 1, that is, by setting the first arc surface 111 protruding away from the smoke pipe, the pressure of the external airflow is dispersed (since the first arc surface 111 in contact with the external airflow is a convex arc, the wind pressure cannot be positively pressed), and the first arc surface 111 and the second arc surface recessed towards the smoke pipe are used to guide the external airflow. Only a small part of the external airflow can enter the smoke pipe and collide with the flue gas discharged by the gas water heater through the opening 224 of the second side wall 223 of the flow guide groove 22. The flue gas discharge thrust of the gas water heater is concentrated on the smoke cap 10 and is discharged through the gas outlet 123 on the pipe body 12 of the smoke cap 10, thereby realizing the differentiated processing of the external wind pressure and the flue gas discharge thrust, reducing the pressure of the external wind pressure and the flue gas discharge thrust, and facilitating the flue gas discharge while improving the anti-backdraft capability to ensure the normal combustion of the gas water heater. When the gas water heater is not working, that is, under the action of no flue gas discharge thrust, the smoke cap 10 is reset to the initial position of the smoke cap to close the gas outlet 123 under the action of the first elastic member 50, which can reduce the entry of impurities into the gas water heater.

[0085] Please refer to Figure 4 The flow direction of the external airflow is shown by the double-headed arrow in the figure, and the flow direction of the flue gas (flue gas discharge direction) is shown by the single-headed arrow in the figure.

[0086] Preferably, the smoke cap assembly 1 further comprises a second elastic member (not shown in the figure) located between the base 30 and the flow guide 20; the flow guide 20 moves in the reverse direction relative to the base 30 along the axial direction P under the action of the external airflow to reduce the flow area of the flow gap 41 when the flow guide 20 moves away from the initial position of the flow guide; after the flow guide 20 moves away from the initial position of the flow guide, the flow guide 20 moves in the positive direction relative to the base 30 along the axial direction P under the action of the second elastic member to return to the initial position of the flow guide. In this way, by arranging the second elastic member, the flow guide 20 can be reset after moving away from the initial position of the flow guide. By arranging the flow guide 20, the flow guide 20 can move in the reverse direction relative to the base 30 along the axial direction P under the action of the external airflow to reduce the flow area of the flow gap 41, so that as the wind pressure increases, the flow area of the flow gap 41 becomes smaller, and the resistance to the external airflow becomes greater, making it more difficult for the external airflow to enter the gas water heater.

[0087] Specifically, the flow guide 20 comprises a flow guide extension 23 extending in the axial direction P towards the base 30, and the flow guide extension 23 is arranged on the outer periphery of the flow guide groove 22; the base 30 comprises a main body 31 and a base extension 32 arranged on the outer periphery of the main body 31 and extending in the axial direction P towards the flow guide extension 23, and the flow guide extension 23 and the base extension 32 have a non-zero distance in the axial direction P; the main body 31 and the outer surface of the bottom wall 221 of the flow guide groove 22 form the flow gap 41, the outer surface of the second side wall 223 of the flow guide groove 22, the flow guide extension 23, and the base extension 32 form the flow space 42, the flow space 42 is connected to the opening 224 and the flow gap 41, and the opening 224 and the flow gap 41 are arranged on one side of the flow space 42 close to the central axis p of the smoke cap assembly 1 in the axial direction P. In this way, by arranging the flow space 42, the external airflow can enter the flow space 42 and then pass through the flow gap 41, so that the impurities in the external airflow can be blocked to prevent the impurities from entering the smoke pipe.

[0088] In the embodiment, the outer side of the first end 121 of the pipe body 12 is provided with a limiting protrusion 124 extending outwardly along the radial direction R of the pipe body 12; the limiting protrusion 124 cooperates with the periphery of the mounting port 21 to limit the pipe body 12 from being separated from the mounting port 21 of the flow guide 20; the two ends of the first elastic member 50 in the axial direction P abut against the limiting protrusion 124 and the outer periphery of the mounting port 21, respectively. In this way, by arranging the limiting protrusion 124, the pipe body 12 can be limited from being separated from the mounting port 21 of the flow guide 20, and the first elastic member 50 can be provided with a mounting position.

[0089] Preferably, the outer diameter d1 of the cap body 11 is greater than the outer diameter d2 of the pipe body 12, and the outer diameter d3 of the flow guide groove 22 is greater than the outer diameter d1 of the cap body 11, so as to effectively guide the external airflow into the flow guide groove 22 while avoiding the collision of the smoke discharged from the air outlet 123 on the side wall of the pipe body 12 with the external airflow.

[0090] The side of the cap body 11 along the axial direction P towards the pipe body 12 is a third arc surface 113 protruding away from the smoke pipe. In this way, by setting the side of the cap body 11 along the axial direction P towards the pipe body 12 as a third arc surface 113 protruding away from the smoke pipe, the smoke discharge thrust can be effectively concentrated.

[0091] In the present embodiment, the number of air outlets 123 is greater than or equal to four and is an even number, and the plurality of air outlets 123 are equidistantly arranged along the circumferential direction of the pipe body 12, so as to effectively balance the smoke discharge thrust and balance the force acting on the smoke cap 10.

[0092] Preferably, the shape of the air outlet 123 is rectangular. In this way, by limiting the shape of the air outlet 123 to be rectangular, the adjustment of the smoke discharge area can be directly realized by adjusting the size of the rectangle, and the adjustment of the smoke discharge area can be more conveniently realized compared with other shapes. However, the shape of the air outlet 123 is not limited to this, and in other embodiments, the shape of the air outlet 123 can also be other shapes.

[0093] The total area of the plurality of air outlets 123 is 80%-90% of the area of the circumferential area A of the side wall of the pipe body 12 where the air outlets 123 are arranged. In this way, by limiting the total area of the plurality of air outlets 123 to be within the percentage range of the area of the circumferential area A of the side wall of the pipe body 12 where the air outlets 123 are arranged, on the one hand, the total area of the air outlets 123 is prevented from being too small to affect the smoke discharge area, and on the other hand, the total area of the air outlets 123 is prevented from being too large to affect the support strength of the pipe body 12.

[0094] In the present embodiment, the number of openings 224 is greater than or equal to four and is an even number, and the plurality of openings 224 are equidistantly arranged along the circumferential direction of the second side wall 223 of the flow guide groove 22, so as to effectively balance the external airflow entering the openings 224 and balance the force acting on the flow guide 20.

[0095] Preferably, the shape of the opening 224 is circular. In this way, by limiting the shape of the opening 224 to be circular, the airflow entering the opening 224 is maximally prevented from being blocked to form noise. However, the shape of the air outlet 123 is not limited to this, and in other embodiments, the shape of the air outlet 123 can also be other shapes.

[0096] The total area of the plurality of openings 224 is 40-60% of the area of the circumferential region B of the second side wall 223 of the flow guide groove 22 in which the openings 224 are arranged. In this way, by limiting the total area of the plurality of openings 224 to a percentage range of the area of the circumferential region B of the second side wall 223 of the flow guide groove 22 in which the openings 224 are arranged, the intake area of the external airflow and the structural strength of the flow guide groove 22 are better balanced.

[0097] Preferably, the material of the smoke cap 10 is stainless steel, which can achieve better structural strength while effectively preventing corrosion. The materials of the flow guide 20 and the base 30 are both galvanized sheets, thereby achieving the effect of saving manufacturing costs.

[0098] The embodiment also provides a gas water heater comprising the smoke cap assembly 1 as described above.

[0099] The smoke cap assembly 1 of the embodiment and the gas water heater comprising the same achieve the following effects. The first arc surface 111 protruding away from the smoke pipe direction is arranged to disperse the pressure of the external airflow, and the first arc surface 111 and the second arc surface recessed toward the smoke pipe direction are arranged to guide the external airflow. Only a small part of the external airflow can enter the smoke pipe and collide with the exhaust smoke of the gas water heater through the openings 224 in the second side wall 223 of the flow guide groove 22. The exhaust smoke thrust of the gas water heater is concentrated on the smoke cap 10 and is discharged through the air outlet 123 on the pipe body 12 of the smoke cap 10. Thus, the external wind pressure and the exhaust smoke thrust are distinguished and processed, the pressure of the external wind pressure and the exhaust smoke thrust is reduced, the smoke exhaust is facilitated, the anti-backup wind capability is improved, and the normal combustion of the gas water heater is ensured. When the gas water heater is not working, i.e., under the action of no exhaust smoke thrust, the smoke cap 10 is reset to the initial position of the smoke cap in which the air outlet 123 is closed under the action of the first elastic member 50, and the impurities entering the interior of the gas water heater are reduced.

[0100] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A smoke cap assembly provided at an end of a smoke pipe of a gas water heater, characterized in that, It includes: A smoke cap, which includes a cap body and a pipe body connected in sequence along an axial direction, the pipe body includes a first end and a second end arranged oppositely along the axial direction, the first end of the pipe body communicates with the smoke pipe, a side wall of the pipe body is provided with an air outlet, the cap body is arranged on the second end of the pipe body, and a side of the cap body away from the pipe body along the axial direction is a first arc surface protruding away from the smoke pipe; A flow guide member, which is provided with a mounting hole, the first end of the pipe body is mounted on the mounting hole through a first elastic member, the flow guide member is provided with a flow guide groove recessed away from the pipe body along an outer periphery of the mounting hole, a bottom wall of the flow guide groove is a second arc surface recessed towards the smoke pipe, the flow guide groove includes a first side wall and a second side wall arranged oppositely and connected to two ends of the second arc surface, the first side wall is arranged close to the mounting hole, the second side wall is arranged away from the mounting hole, and the second side wall is provided with an opening; A base, the flow guide member is mounted on the base, and a flow passage gap is formed between an end of the flow guide member close to the smoke pipe and the base, the flow passage gap communicates the opening and the smoke pipe; Wherein, the smoke cap can move along the axial direction relative to the flow guide member in a positive direction under the action of the flue gas discharged by the gas water heater to open the air outlet; after the smoke cap moves away from the initial position of the smoke cap, the smoke cap moves along the axial direction relative to the flow guide member in a reverse direction under the action of the first elastic member to return to the initial position of the smoke cap to close the air outlet; after the external airflow enters the flow guide groove along the first arc surface of the cap body, the external airflow enters the opening along the second arc surface of the flow guide groove.

2. The tip cap assembly of claim 1, wherein, The smoke cap assembly further includes a second elastic member, which is located between the base and the flow guide member; The flow guide member moves along the axial direction relative to the base in a reverse direction under the action of the external airflow to reduce the flow area of the flow passage gap; after the flow guide member moves away from the initial position of the flow guide member, the flow guide member moves along the axial direction relative to the base in a positive direction under the action of the second elastic member to return to the initial position of the flow guide member.

3. The tip cap assembly of claim 2, wherein, The flow guide member includes a flow guide member extension extending towards the base along the axial direction, and the flow guide member extension is arranged on an outer periphery of the flow guide groove; The base includes a main body and a base extension, the base extension is arranged along an outer periphery of the main body and extends towards the flow guide member extension along the axial direction, and the flow guide member extension and the base extension have a non-zero spacing along the axial direction; The main body and an outer surface of the bottom wall of the flow guide groove form the flow passage gap, an outer surface of the second side wall of the flow guide groove, the flow guide member extension, and the base extension form a flow passage space, the flow passage space communicates the opening and the flow passage gap, and the opening and the flow passage gap are arranged on one side of the flow passage space close to a central axis of the smoke cap assembly along the axial direction.

4. The tip cap assembly of claim 1, wherein An outer side of the first end of the pipe body is provided with a limiting protrusion extending radially outwardly of the pipe body; the limiting protrusion cooperates with a periphery of the mounting port for limiting the pipe body from being detached from the mounting port of the flow guide; Two ends of the first elastic member in the axial direction respectively abut against the limiting protrusion and the outer periphery of the mounting port.

5. The tip cap assembly of claim 1, wherein An outer diameter of the cap body is greater than an outer diameter of the pipe body, and an outer diameter of the flow guide groove is greater than the outer diameter of the cap body; and / or, A side of the cap body facing the pipe body in the axial direction is a third arc surface protruding away from the smoke pipe.

6. The tip cap assembly of claim 1, wherein The number of the air outlets is greater than or equal to four and is an even number, and a plurality of the air outlets are equidistantly arranged along the circumferential direction of the pipe body.

7. The tip cap assembly of claim 6, wherein, The shape of the air outlet is rectangular; and / or, The total area of the plurality of air outlets is 80%-90% of the area of the circumferential region of the side wall of the pipe body on which the air outlets are arranged.

8. The tip cap assembly of claim 1, wherein, The number of the openings is greater than or equal to four and is an even number, and a plurality of the openings are equidistantly arranged along the circumferential direction of the second side wall of the flow guide groove.

9. The tip cap assembly of claim 8, wherein, The shape of the opening is circular; and / or, The total area of the plurality of openings is 40%-60% of the area of the circumferential region of the second side wall of the flow guide groove on which the openings are arranged.

10. A gas water heater characterized by, The gas water heater comprises the smoke cap assembly according to any one of claims 1-9.

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