Volute for fan of gas water heater

Abstract

The invention relates to the technical field of volutes for fans of gas water heaters, discloses a volute for a fan of a gas water heater, and solves the problems that in the using process of the volute for the fan of the gas water heater, an air inlet filter part in the volute cannot be quickly disassembled, assembled and cleaned, and the air inlet amount cannot be adjusted according to actual needs. The volute comprises a volute body, an air inlet is formed in the middle of the front side of the volute body, an air outlet is formed in the top of one end of the volute body, a connecting frame is fixedly installed at the top of the air outlet, connecting holes are formed in the four corners of the connecting frame in a penetrating mode, and an air inlet assembly is fixedly installed on the side, away from the volute body, of the air inlet; according to the volute for the fan of the gas water heater, in the using process of the volute for the fan of the gas water heater, the air inlet filter part in the volute can be rapidly disassembled, assembled and cleaned, the air inlet amount can be adjusted according to actual needs, and it is ensured that the gas water heater can achieve higher combustion efficiency while maintenance is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of volutes for gas water heater fans, and in particular relates to a volute for a gas water heater fan. Background Art

[0002] A gas water heater, also known as a gas water boiler, is a gas appliance that uses gas as fuel and transfers heat to cold water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing hot water. The gas water heater fan volute is one of the core components of the combustion system, and its main functions are to guide airflow, stabilize combustion, and reduce noise. However, during the use of the gas water heater fan volute, the internal air intake filter cannot be quickly disassembled and cleaned, and the air intake volume cannot be adjusted according to actual needs. This makes maintenance inconvenient and also fails to ensure that the gas water heater achieves higher combustion efficiency. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a volute for a gas water heater fan, which effectively solves the problem that the volute for the gas water heater fan cannot be quickly disassembled and cleaned during use, and the air intake volume cannot be adjusted according to actual needs, which is inconvenient for maintenance and cannot ensure that the gas water heater achieves higher combustion efficiency.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a volute for a gas water heater fan, comprising a volute main body, an air inlet is provided in the middle of the front side of the volute main body, an air outlet is provided at the top of one end of the volute main body, a connecting frame is fixedly installed on the top of the air outlet, connecting holes are provided through the four corners of the connecting frame, and an air inlet assembly is fixedly installed on the side of the air inlet away from the volute main body.

[0005] Preferably, the air inlet assembly includes a frame, a circular opening is provided inside the frame on one side close to the air inlet, a circular groove is provided on the side of the frame away from the circular opening, four fan-shaped openings are evenly provided inside the circular groove, and the fan-shaped arc of the four fan-shaped openings is forty-five degrees, a positioning shaft is fixedly installed in the middle of the circular groove, an air inlet adjustment assembly is installed on the side of the frame away from the volute body, one side of the frame is an open structure, a movable frame is installed inside the frame, and the movable frame is slidably installed inside the frame, a filter screen is fixedly installed inside the movable frame, an adjustment fixing assembly is fixedly installed on the side of the movable frame close to the opening structure of the frame, and the adjustment fixing assembly is located outside the frame, and a fixing seat is fixedly installed on the top and bottom ends of one side of the frame close to its opening structure, and the top and bottom ends of the adjustment fixing assembly are respectively connected to the two fixing seats.

[0006] Preferably, the adjustment and fixing assembly includes a bar shell, and the top and bottom ends of the bar shell are both open structures, one side of the bar shell is fixedly connected to the outer side of the movable frame, an adjusting gear is provided in the middle of the interior of the bar shell, an adjusting shaft is fixedly installed through the interior of the adjusting gear, and one end of the adjusting shaft is rotatably connected to the inner wall of the bar shell, and the other end of the adjusting shaft movably passes through and extends to the outside of the bar shell, and an adjusting block is fixedly installed on the end of the adjusting shaft located outside the bar shell, and two transmission racks are staggered and meshed with each other inside the bar shell and on the outside of the adjusting gear, and a movable frame is fixedly installed on the side of the two transmission racks away from the adjusting gear, and the movable frame is an L-shaped structure, and a fixing rod is fixedly installed on the ends of the two movable frames away from each other, and the end of the fixing rod away from the movable frame is movably inserted into the inside of the fixed seat.

[0007] Preferably, positioning seats are provided above and below the adjusting gear, and the two positioning seats are symmetrically fixedly installed inside the strip shell. The ends of the two positioning seats away from each other are fixedly installed with spring telescopic rods, and the ends of the two spring telescopic rods away from the positioning seats are respectively fixedly connected to the two movable frames.

[0008] Preferably, a first positioning slider is fixedly installed on a side of the movable frame away from the transmission rack, first positioning slots are penetrated through both sides of the bar-shaped housing, and the first positioning slider is slidably installed inside the first positioning slots.

[0009] Preferably, the air inlet adjustment assembly includes a four-leaf adjustment disk, and the four blades of the four-leaf adjustment disk are all fan-shaped structures that are adapted to the size of the fan-shaped opening. The four-leaf adjustment disk is movably mounted inside the circular groove, and the four-leaf adjustment disk is rotatably mounted on the outside of the positioning shaft. A rotating ring is fixedly mounted on the outside of one end of the four-leaf adjustment disk away from the circular groove, and a transmission gear ring is provided on the side of the rotating ring away from the four-leaf adjustment disk, and the outer diameter of the transmission gear ring is larger than the outer diameter of the rotating ring. Four first connecting blocks are evenly fixedly mounted on the inner wall of the transmission gear ring, and the four first connecting blocks are fixedly connected to the rotating ring at one end away from the transmission gear ring.

[0010] Preferably, a bar frame is provided on the outside of the transmission gear ring, and the bar frame is fixedly installed on the outside of the frame body, and the side of the bar frame close to the transmission gear ring is an open structure, and an adjusting motor is fixedly installed on the top of the bar frame, and an adjusting screw is rotatably installed inside the bar frame, and the output shaft of the adjusting motor movably passes through the top of the bar frame and is fixedly connected to the top of the adjusting screw, and a threaded sleeve is threadedly installed inside the bar frame and on the outside of the adjusting screw, and a second connecting block is fixedly installed on the side of the threaded sleeve close to the opening structure of the bar frame, and the end of the second connecting block away from the threaded sleeve extends to the outside of the bar frame, and a movable rack is fixedly installed on the side of the second connecting block away from the threaded sleeve, and the movable rack is meshed with the transmission gear ring.

[0011] Preferably, a second positioning slider is fixedly installed on the side of the threaded sleeve away from the second connecting block, a second positioning slot is penetrated through the side of the bar frame away from the circular movable rack, and the second positioning slider is slidably installed inside the second positioning slot.

[0012] Preferably, a support seat is fixedly installed on the bottom of the volute body, a support base plate is fixedly installed on the bottom of the support seat, and mounting holes are opened through the four corners of the support base plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1) During operation, the interaction between the volute body, air outlet, connection frame, connection hole, air inlet and air inlet assembly enables the internal air inlet filter of the gas water heater fan to be quickly disassembled and cleaned during use, and the air inlet volume can be adjusted according to actual needs, which is convenient for maintenance and ensures that the gas water heater can achieve higher combustion efficiency. 2) During operation, the interaction between the first positioning slider and the first positioning slot enables the movable frame to achieve better stability when moving, thereby ensuring that the adjustment and fixing assembly can work stably; 3) During operation, the interaction between the second positioning slider and the second positioning slot enables the threaded sleeve to achieve better stability when moving, thereby ensuring that the air inlet adjustment component can work stably; 4) During operation, the interaction between the support base, the support base plate and the mounting holes can facilitate the installation of the entire volute during use, thereby facilitating better operation by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0015] In the attached figure: Figure 1 This is a structural schematic diagram of a volute for a gas water heater fan of the present invention; Figure 2 This is a schematic diagram of the volute main structure of the present invention; Figure 3 This is a schematic structural diagram of the air inlet assembly of the present invention; Figure 4 It is a schematic diagram of the frame structure of the present invention; Figure 5 It is a schematic diagram of the movable frame structure of the present invention; Figure 6This is a schematic diagram of the internal structure of the strip-shaped housing of the present invention; Figure 7 It is a structural schematic diagram of the air inlet adjustment component of the present invention.

[0016] Figure: 1. Volute body; 2. Air inlet; 3. Air outlet; 4. Connecting frame; 5. Connecting hole; 6. Air inlet assembly; 7. Frame; 8. Circular opening; 9. Circular groove; 10. Sector opening; 11. Positioning shaft; 12. Air inlet adjustment assembly; 13. Movable frame; 14. Filter plate; 15. Adjustment and fixing assembly; 16. Fixing seat; 17. Strip housing; 18. Adjustment gear; 19. Adjustment shaft; 20. Adjustment block; 21. Transmission rack; 22. Movable frame; 23. , fixing rod; 24, positioning seat; 25, spring telescopic rod; 26, first positioning slider; 27, first positioning slot; 28, four-leaf adjustment disk; 29, rotating ring; 30, transmission gear ring; 31, first connecting block; 32, bar frame; 33, adjusting motor; 34, adjusting screw; 35, threaded sleeve; 36, second connecting block; 37, movable rack; 38, second positioning slider; 39, second positioning slot; 40, support seat; 41, support base plate; 42, mounting hole. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] Embodiment 1, by Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 The present invention includes a volute body 1, an air inlet 2 is provided in the middle of the front side of the volute body 1, an air outlet 3 is provided at the top of one end of the volute body 1, a connecting frame 4 is fixedly installed on the top of the air outlet 3, and connecting holes 5 are penetrated at the four corners of the connecting frame 4. An air inlet assembly 6 is fixedly installed on the side of the air inlet 2 away from the volute body 1. During use, the volute for the fan of the gas water heater can quickly disassemble and clean its internal air inlet filter during use, and can adjust the air intake volume according to actual needs, which is convenient for maintenance and ensures that the gas water heater can achieve higher combustion efficiency. A support seat 40 is fixedly installed at the bottom of the volute body 1, and a support base plate 41 is fixedly installed at the bottom of the support seat 40, and mounting holes 42 are opened through the four corners of the support base plate 41. During use, the interaction between the support seat 40, the support base plate 41 and the mounting holes 42 can facilitate the installation of the entire volute during use, thereby facilitating better operation by the staff.

[0019] The second embodiment, on the basis of the first embodiment, the air inlet assembly 6 includes a frame 7, a circular opening 8 is opened inside the frame 7 near the air inlet 2, a circular groove 9 is opened on the side of the frame 7 away from the circular opening 8, four fan-shaped openings 10 are evenly opened inside the circular groove 9, and the fan-shaped arc of the four fan-shaped openings 10 is forty-five degrees. A positioning shaft 11 is fixedly installed on the middle part of the circular groove 9, an air inlet adjustment assembly 12 is installed on the side of the frame 7 away from the volute body 1, one side of the frame 7 is an open structure, a movable frame 13 is installed inside the frame 7, and the movable frame 13 is slidably installed inside the frame 7, a filter screen plate 14 is fixedly installed inside the movable frame 13, an adjustment fixing assembly 15 is fixedly installed on the side of the movable frame 13 near the opening structure of the frame 7, and the adjustment fixing assembly 15 is located on the outside of the frame 7, and the top and bottom ends of the frame 7 near its opening structure are fixedly installed with fixing seats 16, and the top and bottom ends of the adjustment fixing assembly 15 are respectively connected to the two fixing seats 16; The adjusting and fixing assembly 15 includes a strip-shaped shell 17, and the top and bottom ends of the strip-shaped shell 17 are both open structures. One side of the strip-shaped shell 17 is fixedly connected to the outer side of the movable frame 13. An adjusting gear 18 is provided in the middle of the interior of the strip-shaped shell 17. An adjusting shaft 19 is fixedly installed inside the adjusting gear 18, and one end of the adjusting shaft 19 is rotatably connected to the inner wall of the strip-shaped shell 17. The other end of the adjusting shaft 19 movably penetrates and extends to the outside of the strip-shaped shell 17. An adjusting block 20 is fixedly installed on one end of the adjusting shaft 19 located outside the strip-shaped shell 17. Two transmission racks 21 are staggered and meshed with each other inside the strip-shaped shell 17 and on the outside of the adjusting gear 18. A movable frame 22 is fixedly installed on the side of the two transmission racks 21 away from the adjusting gear 18, and the movable frame 22 is an L-shaped structure. A fixing rod 23 is fixedly installed on the ends of the two movable frames 22 away from each other, and the fixing rod 23 is fixedly installed on the ends of the two movable frames 22 away from each other. The end of the fixed rod 23 away from the movable frame 22 is movably inserted into the interior of the fixed seat 16, and a positioning seat 24 is provided above and below the adjusting gear 18, and the two positioning seats 24 are symmetrically fixedly installed in the interior of the strip housing 17, and the ends of the two positioning seats 24 away from each other are fixedly installed with a spring telescopic rod 25, and the ends of the two spring telescopic rods 25 away from the positioning seat 24 are respectively fixedly connected to the two movable frames 22, and a first positioning slider 26 is fixedly installed on the side of the movable frame 22 away from the transmission rack 21, and a first positioning slot 27 is provided on both sides of the strip housing 17, and the first positioning slider 26 slides through the interior of the first positioning slot 27. During use, the interaction between the first positioning slider 26 and the first positioning slot 27 can make the movable frame 22 easier to achieve better stability when moving, thereby ensuring that the adjustment and fixing assembly 15 can work stably; The air inlet adjustment assembly 12 includes a four-leaf adjustment disk 28, and the four blades of the four-leaf adjustment disk 28 are all fan-shaped structures that are adapted to the size of the fan-shaped opening 10. The four-leaf adjustment disk 28 is movably mounted inside the circular groove 9, and the four-leaf adjustment disk 28 is rotatably mounted on the outside of the positioning shaft 11. A rotating ring 29 is fixedly mounted on the outside of one end of the four-leaf adjustment disk 28 away from the circular groove 9. A transmission gear ring 30 is provided on the side of the rotating ring 29 away from the four-leaf adjustment disk 28, and the outer diameter of the transmission gear ring 30 is larger than the outer diameter of the rotating ring 29. The transmission gear ring 30 has a diameter, and four first connecting blocks 31 are evenly fixedly installed on the inner wall of the transmission gear ring 30, and the ends of the four first connecting blocks 31 away from the transmission gear ring 30 are fixedly connected to the rotating ring 29. A bar frame 32 is provided on the outside of the transmission gear ring 30, and the bar frame 32 is fixedly installed on the outside of the frame body 7. The side of the bar frame 32 close to the transmission gear ring 30 is an open structure. An adjusting motor 33 is fixedly installed on the top of the bar frame 32, and an adjusting screw 34 is rotatably installed inside the bar frame 32, and the output of the adjusting motor 33 is adjusted. The shaft movably passes through the top of the bar frame 32 and is fixedly connected to the top of the adjusting screw 34. A threaded sleeve 35 is threadedly installed inside the bar frame 32 and on the outside of the adjusting screw 34. A second connecting block 36 is fixedly installed on the side of the threaded sleeve 35 near the opening structure of the bar frame 32, and one end of the second connecting block 36 away from the threaded sleeve 35 extends to the outside of the bar frame 32. A movable rack 37 is fixedly installed on the side of the second connecting block 36 away from the threaded sleeve 35, and the movable rack 37 is meshed with the transmission gear ring 30. A second positioning slide block 38 is fixedly installed on the side of the threaded sleeve 35 away from the second connecting block 36. A second positioning slot 39 is provided on the side of the bar frame 32 away from the circular movable rack 37, and the second positioning slide block 38 slides through the inside of the second positioning slot 39. During use, the interaction between the second positioning slide block 38 and the second positioning slot 39 can make the threaded sleeve 35 easier to achieve better stability when moving, thereby ensuring that the air inlet adjustment assembly 12 can work stably.

[0020] Working principle: When working, first use the mounting bolts that match the diameter of the mounting holes 42 to fix the support base plate 41, so as to achieve the fixed installation of the whole volute. Then, during use, when the air inlet filter needs to be cleaned, the rotating adjustment block 20 drives the adjusting shaft 19 to rotate, the adjusting shaft 19 drives the adjusting gear 18 to rotate, the adjusting gear 18 drives the transmission rack 21 to move, the transmission rack 21 drives the movable frame 22 to move, the movable frame 22 drives the first positioning slider 26 to slide inside the first positioning slot 27, which can ensure that the movable frame 22 achieves better stability when moving. At the same time, the movable frame 22 moves to squeeze the spring telescopic rod 25, causing the spring telescopic rod 25 to contract. At the same time, the movable frame 22 The fixing rod 23 is driven to move, and the fixing rod 23 moves and disengages from the fixing seat 16 to release the positioning of the movable frame 13, and then the rotation of the adjusting block 20 is stopped, and the adjusting block 20 is pulled to drive the movable frame 13 to move out of the interior of the frame body 7, and then the filter screen 14 inside the movable frame 13 can be cleaned. After the cleaning is completed, the above operation is repeated, and then the movable frame 13 is reinserted into the interior of the frame body 7. After the movable frame 13 is fully inserted, the fixing rod 23 is aligned with the fixing seat 16, and then the adjusting block 20 is released. At this time, the movable frame 22 is pushed to reset and move under the action of the rebound force of the spring telescopic rod 25, and the movable frame 22 drives the fixing rod 23 to reset and move, and the fixing rod 23 moves and is inserted into the interior of the fixing seat 16, so that the movable frame 13 is repositioned inside the frame body 7. Then, during use, external air enters the interior of the frame 7 through the fan-shaped opening 10, is filtered under the action of the filter screen 14, and the filtered air enters the interior of the volute main body 1 through the circular opening 8. When the air inlet volume needs to be adjusted, the adjusting motor 33 is started to drive the adjusting screw 34 to rotate, and the adjusting screw 34 drives the threaded sleeve 35 to move, and the threaded sleeve 35 drives the second positioning slider 38 to slide inside the second positioning slot 39, which can ensure that the threaded sleeve 35 achieves better stability when moving. At the same time, the threaded sleeve 35 drives the movable rack 37 to move through the second connecting block 36, and the movable rack 37 drives the transmission gear ring 30 to rotate. The transmission gear ring 30 drives the rotating ring 29 to rotate through the first connecting block 31, and the rotating ring 29 drives the four-leaf adjusting disk 28 to rotate. The four-leaf adjusting disk 28 changes the blocking area of ​​its four blades on the four fan-shaped openings 10 during rotation, thereby adjusting the air inlet volume; In this way, the air inlet filter inside the volute of the gas water heater fan can be quickly disassembled and cleaned during use, and the air inlet volume can be adjusted according to actual needs, which facilitates maintenance while ensuring that the gas water heater can achieve higher combustion efficiency.

Claims

1. A volute for a gas water heater fan, comprising a volute body (1), characterized in that: An air inlet (2) is provided in the middle of the front side of the volute body (1), an air outlet (3) is provided at the top of one end of the volute body (1), a connecting frame (4) is fixedly installed on the top of the air outlet (3), and connecting holes (5) are provided through the four corners of the connecting frame (4), and an air inlet assembly (6) is fixedly installed on the side of the air inlet (2) away from the volute body (1).

2. A volute for a gas water heater fan according to claim 1, characterized in that: The air inlet assembly (6) comprises a frame (7), a circular opening (8) is provided on the side of the frame (7) close to the air inlet (2), a circular groove (9) is provided on the side of the frame (7) away from the circular opening (8), four fan-shaped openings (10) are evenly provided inside the circular groove (9), and the fan-shaped arc of the four fan-shaped openings (10) is 45 degrees, a positioning shaft (11) is fixedly installed in the middle of the circular groove (9), an air inlet adjustment assembly (12) is installed on the side of the frame (7) away from the volute body (1), one side of the frame (7) is an open structure, and the frame A movable frame (13) is installed inside the frame (7), and the movable frame (13) is slidably installed inside the frame (7). A filter screen (14) is fixedly installed inside the movable frame (13). An adjustment fixing component (15) is fixedly installed on a side of the movable frame (13) close to the opening structure of the frame (7), and the adjustment fixing component (15) is located outside the frame (7). A fixing seat (16) is fixedly installed on the top and bottom ends of a side of the frame (7) close to its opening structure, and the top and bottom ends of the adjustment fixing component (15) are respectively connected to the two fixing seats (16).

3. A volute for a gas water heater fan according to claim 2, characterized in that: The adjusting and fixing assembly (15) includes a strip-shaped shell (17), and the top and bottom ends of the strip-shaped shell (17) are both open structures. One side of the strip-shaped shell (17) is fixedly connected to the outside of the movable frame (13). An adjusting gear (18) is provided in the middle of the interior of the strip-shaped shell (17). An adjusting shaft (19) is fixedly installed through the interior of the adjusting gear (18), and one end of the adjusting shaft (19) is rotatably connected to the inner wall of the strip-shaped shell (17). The other end of the adjusting shaft (19) is movable through and extends to the outside of the strip-shaped shell (17). (19) An adjustment block (20) is fixedly installed at one end outside the strip housing (17), and two transmission racks (21) are staggeredly meshed and connected inside the strip housing (17) and outside the adjustment gear (18). A movable frame (22) is fixedly installed on the side of the two transmission racks (21) away from the adjustment gear (18), and the movable frame (22) is an L-shaped structure. A fixed rod (23) is fixedly installed at one end of the two movable frames (22) away from each other, and the end of the fixed rod (23) away from the movable frame (22) is movably inserted into the interior of the fixed seat (16).

4. A volute for a gas water heater fan according to claim 3, characterized in that: Positioning seats (24) are provided above and below the adjusting gear (18), and the two positioning seats (24) are symmetrically fixedly installed inside the strip shell (17). The ends of the two positioning seats (24) away from each other are fixedly installed with spring telescopic rods (25), and the ends of the two spring telescopic rods (25) away from the positioning seats (24) are fixedly connected to the two movable frames (22) respectively.

5. The volute for a gas water heater fan according to claim 3, characterized in that: A first positioning slide block (26) is fixedly installed on one side of the movable frame (22) away from the transmission rack (21), and first positioning slots (27) are provided through both sides of the strip-shaped housing (17), and the first positioning slide block (26) is slidably installed inside the first positioning slots (27).

6. A volute for a gas water heater fan according to claim 2, characterized in that: The air inlet adjustment component (12) includes a four-leaf adjustment disk (28), and the four blades of the four-leaf adjustment disk (28) are all fan-shaped structures that are adapted to the size of the fan-shaped opening (10). The four-leaf adjustment disk (28) is movably installed inside the circular groove (9), and the four-leaf adjustment disk (28) is rotatably installed on the outside of the positioning shaft (11). A rotating ring (29) is fixedly installed on the outside of one end of the four-leaf adjustment disk (28) away from the circular groove (9). A transmission gear ring (30) is provided on the side of the rotating ring (29) away from the four-leaf adjustment disk (28), and the outer diameter of the transmission gear ring (30) is larger than the outer diameter of the rotating ring (29). Four first connecting blocks (31) are evenly fixedly installed on the inner wall of the transmission gear ring (30), and the ends of the four first connecting blocks (31) away from the transmission gear ring (30) are all fixedly connected to the rotating ring (29).

7. A volute for a gas water heater fan according to claim 6, characterized in that: The outer side of the transmission gear ring (30) is provided with a strip frame (32), and the strip frame (32) is fixedly installed on the outer side of the frame body (7). The side of the strip frame (32) close to the transmission gear ring (30) is an open structure. The top of the strip frame (32) is fixedly installed with an adjustment motor (33). The interior of the strip frame (32) is rotatably installed with an adjustment screw (34). The output shaft of the adjustment motor (33) movably passes through the top of the strip frame (32) and is fixedly connected to the top of the adjustment screw (34). A threaded sleeve (35) is threadedly mounted inside the strip frame (32) and on the outside of the adjusting screw (34). A second connecting block (36) is fixedly mounted on a side of the threaded sleeve (35) close to the opening structure of the strip frame (32), and an end of the second connecting block (36) away from the threaded sleeve (35) extends to the outside of the strip frame (32). A movable rack (37) is fixedly mounted on a side of the second connecting block (36) away from the threaded sleeve (35), and the movable rack (37) is meshedly connected to the transmission gear ring (30).

8. A volute for a gas water heater fan according to claim 7, characterized in that: A second positioning slide block (38) is fixedly installed on the side of the threaded sleeve (35) away from the second connecting block (36), and a second positioning slot (39) is penetrated through the side of the bar frame (32) away from the circular movable rack (37), and the second positioning slide block (38) is slidably penetrated and installed inside the second positioning slot (39).

9. The volute for a gas water heater fan according to claim 1, characterized in that: A support seat (40) is fixedly mounted on the bottom of the volute body (1), a support base plate (41) is fixedly mounted on the bottom of the support seat (40), and mounting holes (42) are provided through the four corners of the support base plate (41).

Images