Fan volute fixing structure and gas water heater with same

Abstract

The utility model discloses a kind of fan volute fixed structure and gas water heater with it, it is related to fan technical field, and it includes: fan, the fan includes volute and the fan wheel in the volute, motor fixing hole is opened in the volute upside;Motor, the motor includes motor base plate and motor shaft, the motor base plate has the lower convex part bent, the lower convex part upside has lower convex part cavity, fixed part mounting hole is opened in the lower convex part upside;Fixed part, the fixed part has screw head and threaded portion, the threaded portion is screw-threaded with nut;Motor and fan are assembled when first fixed part is installed in the fixed part mounting hole of motor. Then motor and fan are well positioned, make the lower convex part of motor base plate press against volute upside, and the threaded portion of fixed part is inserted into motor fixing hole, finally tighten nut in threaded portion, and fan wheel is well installed on motor shaft to complete assembly, simplify connection structure.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a fan volute fixing structure and a gas water heater having the same. Background Technology

[0002] Gas water heaters heat water using gas, and the exhaust gases produced during operation need to be promptly discharged by a fan. The motor and fan often need to work together, and a typical motor requires several motor brackets and numerous rivets and screws to be fixed to the fan housing, resulting in a complex installation structure. Furthermore, the stability of the motor connection is poor, and the motor is prone to loosening after prolonged operation, affecting the service life of both the motor and the fan. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a fan volute fixing structure and a gas water heater having the same.

[0004] According to a first aspect of the present invention, a fan volute fixing structure includes: a fan, the fan including a volute and a rotor inside the volute, the volute having a motor fixing hole on its upper side; a motor located on the upper side of the volute, the motor including a motor base plate and a motor shaft, the motor base plate having a bent lower protrusion, the upper side of the lower protrusion having a lower protrusion cavity, the lower protrusion having a fixing member mounting hole, the fixing member mounting hole and the motor fixing hole being connected by a fixing member, the lower end face of the lower protrusion abutting against the upper side of the volute, and the motor shaft passing through the volute and connected to the rotor.

[0005] According to some embodiments of the present invention, a volute cover plate is provided on the upper side of the volute, a top protrusion is provided on the volute cover plate, the motor fixing hole is located on the top protrusion, a volute through shaft hole is provided in the middle of the top protrusion, and the motor shaft passes through the volute through shaft hole and is connected to the impeller.

[0006] According to some embodiments of the present invention, a pivot support boss is provided in the middle of the lower side of the motor base plate, and the motor shaft extends downward through the pivot support boss; the pivot support boss is inserted into the volute through-hole, and the outer wall of the pivot support boss is stuck against the hole wall of the volute through-hole.

[0007] According to some embodiments of the present invention, the rotating shaft support boss has a lower bearing cavity, a lower bearing is disposed in the lower bearing cavity, and the lower bearing is fitted onto the motor shaft.

[0008] According to some embodiments of the present invention, the motor further includes a motor housing, the motor base plate is located on the lower side of the motor housing, an outer support plate is provided on the outer side wall of the motor housing, and the motor base plate and the outer support plate are detachably connected.

[0009] According to some embodiments of the present invention, a retaining plate is provided on the motor base plate, and the retaining plate retains the edge of the outer support plate.

[0010] According to some embodiments of this utility model, the fixing member is a screw, the fixing member has a screw head and a threaded part, the screw head is located in the cavity of the lower protrusion, the threaded part is inserted into the motor fixing hole, and the threaded part is threadedly connected to a nut.

[0011] The fan volute fixing structure according to the embodiment of this utility model has at least the following technical effects: 1. When assembling the motor and fan, first install the fastener in the mounting holes of the motor. Then align the motor and fan so that the lower protrusion of the motor base plate abuts against the upper side of the volute, and insert the threaded part of the fastener into the motor mounting hole. Finally, tighten the nut on the threaded part and install the impeller on the motor shaft to complete the assembly. This simplifies the connection structure and improves the assembly efficiency of the motor and fan. 2. The design of the lower protrusion on the underside of the motor makes the position of the motor mounting and fixing parts more robust and reliable. The lower protrusion of the motor presses against the volute of the fan, which reduces the contact area between the motor and the fan while ensuring a sufficiently stable connection between the motor and the fan. This reduces the chance of resonance between the motor and the fan during operation, thereby reducing noise and extending the service life of the motor and the fan. 3. The rotating shaft support boss of the motor base plate is inserted into the volute through shaft hole on the volute cover plate. The outer wall of the rotating shaft support boss is stuck in the hole wall of the volute through shaft hole, which can improve the stability of the motor shaft during installation and rotation, and can further make the motor shaft drive the impeller to rotate more smoothly.

[0012] A gas water heater according to a second aspect of the present invention includes a fan volute fixing structure according to the first aspect of the present invention, wherein the lower side of the volute has a fan air inlet and the side wall of the volute has a fan air outlet.

[0013] According to some embodiments of the present invention, a smoke hood is provided on the lower side of the volute, the smoke hood covers the water heater main unit, the smoke hood has a smoke hood exhaust port on the upper side, and the smoke hood exhaust port is connected to the air inlet of the fan.

[0014] According to some embodiments of the present invention, a smoke extraction pipe is connected to the air outlet of the fan, and a hinge baffle is provided inside the smoke extraction pipe. The hinge baffle is connected to the inner wall of the smoke extraction pipe through a baffle shaft.

[0015] The gas water heater according to the embodiments of this utility model has at least the following beneficial effects: 1. When assembling the motor and fan, first install the fastener in the mounting holes of the motor. Then align the motor and fan so that the lower protrusion of the motor base plate abuts against the upper side of the volute, and insert the threaded part of the fastener into the motor mounting hole. Finally, tighten the nut on the threaded part and install the impeller on the motor shaft to complete the assembly. This simplifies the connection structure and improves the assembly efficiency of the motor and fan. 2. The exhaust gas generated when the water heater is working can be collected by the fume hood. Then the fan starts and the exhaust gas enters the volute through the exhaust port of the fume hood and the air inlet of the fan. It is then discharged from the air outlet of the fan. 3. When the fan is off, the hinge baffle closes and blocks the smoke duct, preventing foreign objects from entering. When the fan is started, the airflow can push open the hinge baffle, allowing the airflow to exit the smoke duct.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of the gas water heater of this utility model; Figure 2 This is a structural schematic diagram of the gas water heater of this utility model; Figure 3 This is a three-dimensional sectional view of the fan volute fixing structure of this utility model; Figure 4 yes Figure 3 Enlarged view of region A in the middle; Figure 5 This is an exploded view of the structure of this utility model; Figure 6 This is a three-dimensional sectional view of the motor of this utility model.

[0018] Figure label: Fan 100, volute 110, fan inlet 111, fan outlet 112, volute cover 120, top boss 121, motor mounting hole 122, volute through shaft hole 123, impeller 130; motor 200, motor housing 210, outer support plate 211, outer support plate edge 212, upper bearing cavity 213, motor base plate 220, lower protrusion 221, lower protrusion cavity 222, fixing mounting hole 223, rotor Shaft support boss 224, lower bearing cavity 225, clamping plate 226, fixing position opening 227, motor shaft 230, lower bearing 240, upper bearing 250, cooling fan 260; fastener 300, screw head 310, threaded part 320, non-circular part 330, nut 340; fume hood 400, fume hood exhaust port 410, fume hood fixing plate 420; smoke pipe 500, hinge baffle 510, baffle shaft 511. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," "exceeding," etc., are understood to exclude the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] The following is for reference. Figure 1 and Figure 2 This invention describes a fan volute fixing structure according to an embodiment of the present invention.

[0024] like Figure 1 and Figure 2As shown, the fan volute fixing structure according to an embodiment of the present utility model includes a fan 100, a motor 200, and a fixing member 300.

[0025] The fan 100 includes a volute 110 and a fan wheel 130 inside the volute 110. A motor mounting hole 122 is provided on the upper side of the volute 110. The motor 200 is located on the upper side of the volute 110. The motor 200 includes a motor base plate 220 and a motor shaft 230. The motor base plate 220 has a bent lower protrusion 221. The upper side of the lower protrusion 221 has a lower protrusion cavity 222. A fixing mounting hole 223 is provided on the lower protrusion 221. The lower end face of the lower protrusion 221 abuts against the upper side of the volute 110. The motor shaft 230 passes through the volute 110 and is connected to the fan wheel 130.

[0026] For example, such as Figure 1 and Figure 2 As shown, the fan 100 includes a volute 110 and a rotor 130 inside the volute 110, which can rotate within the volute 110. A motor mounting hole 122 is provided on the upper side of the volute 110. The motor 200 is located on the upper side of the volute 110 and is fixed relative to it. The motor 200 includes a motor base plate 220 and a motor shaft 230. The motor base plate 220 has a bent lower protrusion 221, with a lower protrusion cavity 222 on its upper side. A fixing mounting hole 223 is provided on the lower protrusion 221, and the lower end face of the lower protrusion 221 abuts against the upper side of the volute 110. The motor shaft 230 passes through the volute 110 and connects to the rotor 130, thus driving the rotor 130 to rotate. The fastener 300 is inserted into the fastener mounting hole 223 and is used to fix the motor 200 and the fan 100.

[0027] In actual assembly, the fastener 300 is first installed in the fastener mounting hole 223 of the motor 200. Then, the motor 200 and the fan 100 are aligned so that the lower protrusion 221 of the motor base plate 220 abuts against the upper side of the volute 110, and the threaded portion 320 of the fastener 300 is inserted into the motor mounting hole 122. Finally, the nut 340 is tightened on the threaded portion 320, and the impeller 130 is installed on the motor shaft 230 to complete the assembly. By pre-installing the fastener 300 on the motor base plate 220, the connection structure can be simplified, and the assembly efficiency of the motor 200 and the fan 100 can be improved.

[0028] The design of the lower protrusion 221 on the underside of the motor 200 makes the connection and fixing part 300 of the motor 200 more robust and reliable. The lower protrusion 221 of the motor 200 presses against the volute 110 of the fan 100, which reduces the contact area between the motor 200 and the fan 100 while ensuring a sufficiently stable connection. This reduces the chance of resonance between the motor 200 and the fan 100 during operation, thereby reducing noise and extending the service life of the motor 200 and the fan 100.

[0029] In some embodiments of this utility model, reference is made to Figure 4 The fastener 300 is a screw. The fastener 300 is inserted into the fastener mounting hole 223. The fastener 300 has a screw head 310 and a threaded part 320. The screw head 310 is located in the lower protrusion cavity 222. The threaded part 320 is inserted into the motor mounting hole 122. The threaded part 320 is threadedly connected to a nut 340, which facilitates the disassembly and assembly of the motor 200 and the fan 100.

[0030] In some embodiments of this utility model, the fastener 300 has a non-circular portion 330, and the fastener mounting hole 223 is a non-circular hole. Thus, after the fastener 300 is inserted into the fastener mounting hole 223, the non-circular portion 330 holds the fastener mounting hole 223 in place, preventing the fastener 300 from rotating, facilitating installation and tightening of the nut 340.

[0031] In some embodiments of this utility model, reference is made to Figure 3 A volute cover plate 120 is provided on the upper side of the volute 110, and a top boss 121 is provided on the volute cover plate 120. The motor fixing hole 122 is located on the top boss 121, and a volute through shaft hole 123 is opened in the middle of the top boss 121. The motor shaft 230 passes through the volute through shaft hole 123 and connects to the impeller 130. The top boss 121 improves the structural strength of the volute cover plate 120, especially the pressure resistance to the motor 200.

[0032] In some embodiments of this utility model, reference is made to Figure 4 A shaft support boss 224 is provided in the middle of the lower side of the motor base plate 220. The motor shaft 230 extends downward through the shaft support boss 224. The shaft support boss 224 is inserted into the volute through-hole 123, and the outer wall of the shaft support boss 224 is engaged with the wall of the volute through-hole 123. The design of the shaft support boss 224 can improve the stability of the motor shaft 230 during installation and rotation. Furthermore, the design of the shaft support boss 224 engaging with the volute through-hole 123 can further make the rotation of the impeller 130 driven by the motor shaft 230 more stable.

[0033] In some embodiments of this utility model, the pivot support boss 224 has a lower bearing cavity 225, and a lower bearing 240 is disposed in the lower bearing cavity 225. The lower bearing 240 is fitted onto the motor shaft 230. The lower bearing 240 is located in the lower bearing cavity 225, which further improves the stability of the motor shaft 230 during installation and rotation.

[0034] In some embodiments of this utility model, reference is made to Figure 5 , Figure 6 The motor 200 also includes a motor housing 210, a motor base plate 220 located under the motor housing 210, an outer support plate 211 provided on the outer side wall of the motor housing 210, and the motor base plate 220 and the outer support plate 211 are detachably connected.

[0035] The mounting bracket 300 can be installed on the lower protrusion 221 on the motor base plate 220 first, and then the motor base plate 220 and the motor housing 210 can be installed together. This makes it convenient to pre-install the mounting bracket 300 on the motor 200.

[0036] In some specific embodiments of this utility model, the motor base plate 220 and the outer support plate 211 of the motor housing 210 can be fixedly connected by screws or snap-fit ​​structures.

[0037] In some embodiments of this utility model, a retaining plate 226 is provided on the motor base plate 220, and the retaining plate 226 retains the edge 212 of the outer support plate 211 of the outer support plate 211. By retaining the outer support plate 211 of the motor housing 210 by the retaining plate 226 of the motor base plate 220, it is easy to align the motor base plate 220 with the motor housing 210.

[0038] In some embodiments of this utility model, a fixing position opening 227 is provided on the motor base plate 220. The fixing position opening 227 is located above the lower protrusion cavity 222. This allows the motor base plate 220 to be assembled and connected with the motor housing 210 before the fixing member 300 is installed, making the installation of the fixing member 300 more flexible.

[0039] In some embodiments of this utility model, an upper bearing cavity 213 is provided on the upper side of the motor housing 210, and an upper bearing 250 is provided in the upper bearing cavity 213. The upper bearing 250 is fitted onto the upper part of the motor shaft 230 to guide the motor shaft 230 to rotate.

[0040] In some embodiments of this invention, a cooling fan 260 is mounted on the motor shaft 230, and the cooling fan 260 is located inside the motor 200. The motor shaft 230 can drive the cooling fan 260 to rotate, thereby dissipating heat from components such as circuit boards inside the motor 200.

[0041] A gas water heater according to a second aspect embodiment of the present invention includes a fan volute fixing structure according to the first aspect embodiment of the present invention, with reference to... Figure 2 , Figure 3 The volute 110 has a fan inlet 111 on its lower side and a fan outlet 112 on its side wall. When the fan 100 is started, the airflow enters the volute 110 through the fan inlet 111 and is discharged through the fan outlet 112.

[0042] According to the embodiments of the present invention, the gas water heater adopts the above-mentioned fan volute fixing structure, which reduces the thickness of the gas water heater, facilitates the miniaturization design of the gas water heater, and can also improve the vibration and noise of the gas water heater, thereby enhancing the user experience.

[0043] In some embodiments of this utility model, a fume hood 400 is provided on the lower side of the volute 110, and the fume hood 400 covers the water heater unit. The upper side of the fume hood 400 has a fume hood exhaust port 410, which is connected to the fan inlet 111. The exhaust gas generated when the water heater is working can be collected by the fume hood 400. Then, the fan 100 is started, and the exhaust gas enters the volute 110 through the fume hood exhaust port 410 and the fan inlet 111, and is discharged from the fan outlet 112 through the fan 100.

[0044] In a further embodiment of this utility model, a smoke hood fixing plate 420 is provided on the smoke hood 400. The smoke hood fixing plate 420 has screw holes, and the smoke hood 400 is fixed by screws installed on the screw holes.

[0045] In some embodiments of this utility model, a smoke extraction pipe 500 is connected to the fan outlet 112, and a hinge baffle 510 is provided inside the smoke extraction pipe 500. The hinge baffle 510 is connected to the inner wall of the smoke extraction pipe 500 through a baffle shaft 511. The exhaust gas passing through the fan outlet 112 can be guided to a predetermined position and discharged through the smoke extraction pipe 500.

[0046] The hinge baffle 510 can rotate and open around the baffle shaft 511. When the fan 100 is off, the hinge baffle 510 closes and blocks the smoke inlet pipe 500, preventing foreign objects from entering the smoke inlet pipe 500. When the fan 100 is started, the airflow can push the hinge baffle 510 open, causing the hinge baffle 510 to open and block the smoke inlet pipe 500, allowing the airflow to exit the smoke inlet pipe 500.

[0047] Other components and operations of the gas water heater according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0048] The following is for reference. Figure 1 and Figure 2 The following describes in detail a fan volute fixing structure according to a specific embodiment of the present invention. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0049] like Figure 1 and Figure 2 As shown, the fan volute fixing structure according to an embodiment of the present utility model includes a fan 100, a motor 200, a fixing component 300, a fume hood 400, and a smoke inlet pipe 500.

[0050] The fan 100 includes a volute 110, a fan inlet 111, a fan outlet 112, a volute cover 120, a top boss 121, a motor mounting hole 122, a volute shaft hole 123, and a fan impeller 130. The fume hood 400 is equipped with a fume hood exhaust port 410 and a fume hood fixing plate 420. The smoke extraction pipe 500 is equipped with a hinge baffle 510 and a baffle shaft 511.

[0051] The motor 200 includes a motor housing 210, an outer support plate 211, an outer support plate edge 212, an upper bearing cavity 213, a motor base plate 220, a lower protrusion 221, a lower protrusion cavity 222, a fixing mounting hole 223, a shaft support boss 224, a lower bearing cavity 225, a clamping plate 226, a fixing opening 227, a motor shaft 230, a lower bearing 240, an upper bearing 250, and a cooling fan 260.

[0052] The fastener 300 connects the fan 100 and the motor 200. The fastener 300 includes a screw head 310, a threaded part 320, a non-circular part 330, and a nut 340.

[0053] In some embodiments of this utility model, the assembly steps of the fully premixed fan are as follows: 1. Mount fastener 300 on motor base plate 220; 2. The motor base plate 220 is installed on the underside of the motor 200; 3. Place the motor 200 in the appropriate position on the volute cover plate 120, and tighten the nut 340 after installation; 4. Mount the impeller 130 onto the motor shaft 230 and adjust its balance; 5. Install the volute 110 onto the volute cover plate 120; 6. Install the fume hood 400 and the smoke inlet pipe 500.

[0054] According to the fan volute fixing structure of this utility model embodiment, the following effects can be achieved by setting it up as follows: First, the fixing member 300 is installed in the fixing member mounting hole 223 of the motor 200. Then, the motor 200 and the fan 100 are aligned so that the lower protrusion 221 of the motor base plate 220 abuts against the upper side of the volute 110. The threaded part 320 of the fixing member 300 is inserted into the motor fixing hole 122. Finally, the nut 340 is tightened on the threaded part 320, and the impeller 130 is installed on the motor shaft 230 to complete the assembly, simplifying the connection structure. The design of the lower protrusion 221 on the lower side of the motor 200 makes the position of the motor 200 connecting fastener 300 more robust and reliable. The lower protrusion 221 of the motor 200 presses against the volute 110 of the fan 100. Under the premise of ensuring that the connection between the motor 200 and the fan 100 is sufficiently stable, the contact area between the motor 200 and the fan 100 is reduced, and the chance of resonance between the motor 200 and the fan 100 during operation is reduced. This reduces noise and extends the service life of the motor 200 and the fan 100.

[0055] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fan volute fixing structure characterized by comprising: include: A fan (100) includes a volute (110) and a fan wheel (130) inside the volute (110). A motor fixing hole (122) is provided on the upper side of the volute (110). The motor (200) is located on the upper side of the volute (110). The motor (200) includes a motor base plate (220) and a motor shaft (230). The motor base plate (220) has a bent lower protrusion (221). The upper side of the lower protrusion (221) has a lower protrusion cavity (222). A fixing mounting hole (223) is provided on the lower protrusion (221). The fixing mounting hole (223) and the motor fixing hole (122) are connected by a fixing member (300). The lower end face of the lower protrusion (221) abuts against the upper side of the volute (110). The motor shaft (230) passes through the volute (110) and is connected to the impeller (130).

2. The fan volute fixing structure according to claim 1, characterized by The volute (110) is provided with a volute cover plate (120) on its upper side. The volute cover plate (120) is provided with a top boss (121). The motor fixing hole (122) is located on the top boss (121). The top boss (121) is provided with a volute through shaft hole (123) in the middle. The motor shaft (230) passes through the volute through shaft hole (123) and is connected to the impeller (130).

3. The fan volute fixing structure according to claim 2, characterized by A pivot support boss (224) is provided in the middle of the lower side of the motor base plate (220), and the motor shaft (230) extends downward through the pivot support boss (224); The pivot support boss (224) is inserted into the volute through hole (123), and the outer wall of the pivot support boss (224) is stuck in the hole wall of the volute through hole (123).

4. The fan volute fixing structure according to claim 3, characterized by The rotating shaft support boss (224) has a lower bearing cavity (225), and a lower bearing (240) is provided in the lower bearing cavity (225). The lower bearing (240) is fitted onto the motor shaft (230).

5. The fan volute fixation structure according to claim 1, characterized by, The motor (200) also includes a motor housing (210), the motor base plate (220) is located on the lower side of the motor housing (210), and an outer support plate (211) is provided on the outer side wall of the motor housing (210). The motor base plate (220) and the outer support plate (211) are detachably connected.

6. The fan volute fixation structure according to claim 5, characterized by A clamping plate (226) is provided on the motor base plate (220), and the clamping plate (226) clamps the edge (212) of the outer support plate (211).

7. The fan volute fixation structure according to claim 1, characterized by The fastener (300) is a screw, which has a screw head (310) and a threaded portion (320). The screw head (310) is located in the cavity (222) of the lower protrusion, and the threaded portion (320) is inserted into the motor fixing hole (122). The threaded portion (320) is threaded with a nut (340).

8. A gas water heater, characterised by, The fan casing fixing structure includes any one of claims 1 to 7, wherein the fan casing (110) has a fan inlet (111) on its lower side and a fan outlet (112) on its side wall.

9. The gas water heater according to claim 8, characterized in that, A smoke hood (400) is provided on the lower side of the volute (110). The smoke hood (400) covers the water heater unit. The smoke hood (400) has a smoke hood exhaust port (410) on the upper side. The smoke hood exhaust port (410) is connected to the fan air inlet (111).

10. The gas water heater according to claim 8, characterized in that, A smoke extraction pipe (500) is connected to the air outlet (112) of the fan. A hinge baffle (510) is provided inside the smoke extraction pipe (500). The hinge baffle (510) is connected to the inner wall of the smoke extraction pipe (500) through a baffle shaft (511).

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