Downdraft prevention device of gas water heater and gas water heater

Abstract

The utility model discloses an anti-downdraft device of a gas water heater, which comprises an exhaust pipe, a connecting pipe, a flared pipe and a pipe orifice connecting piece, the pipe orifice connecting piece is arranged between the connecting pipe and the flared pipe, the edge of the pipe orifice connecting piece protrudes into a channel of the connecting pipe, and the pipe orifice connecting piece is provided with a plurality of air outlets; the driving piece is connected to the connecting pipe, a rotating shaft is arranged between an output shaft of the driving piece and the pipe opening connecting piece, and a pushing piece capable of moving up and down along the rotating shaft is arranged on the rotating shaft; the wind shield is movably connected to the rotating shaft, the wind shield can be opened or folded, and when the pushing piece moves towards the pipe opening connecting piece, the pushing piece pushes the wind shield to enable the wind shield to be gradually unfolded and close the air outlet. The utility model aims to overcome the problems in the prior art, and provides the downdraft prevention device of the gas water heater, which can effectively and stably prevent wind. The utility model further provides the gas water heater which can effectively and stably prevent wind.

Description

Technical Field

[0001] This utility model relates to the field of gas appliance technology, and in particular to an anti-backdraft device for a gas water heater. Background Technology

[0002] Previously, while some simple devices existed to prevent backdraft from gas water heaters, they often had numerous drawbacks. For example, some designs relying solely on one-way valves to prevent backdraft were prone to valve malfunctions after prolonged use, such as the accumulation of impurities or jamming, which could prevent the valves from closing or opening properly, affecting exhaust efficiency and the reliability of backdraft prevention. Others had more complex structures, higher costs, and were not sensitive enough to backdraft during actual operation, failing to effectively prevent backdraft and adapting well to complex airflow conditions in different usage environments, thus failing to meet people's requirements for the safe and stable operation of gas water heaters. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of the prior art and provide an anti-backdraft device for gas water heaters that can effectively and stably prevent backdraft.

[0004] This utility model also provides a gas water heater that can effectively and stably prevent wind damage.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A backdraft prevention device for a gas water heater, comprising:

[0007] An exhaust pipe, comprising a bend and a straight pipe connected to one end of the bend;

[0008] A connecting pipe is used to connect to one end of a straight pipe and is detachably connected to the straight pipe;

[0009] A flared tube, one end of which is connected to the end of a connecting tube, and the diameter of the flared tube gradually increases from the side closest to the connecting tube to the other side of the flared tube.

[0010] A pipe connector is disposed between the connecting pipe and the flared pipe, the edge of the pipe connector protruding into the channel of the connecting pipe, and the pipe connector has multiple air outlets that can connect the connecting pipe and the flared pipe.

[0011] A driving component is connected to the connecting pipe, and a rotating shaft is provided between the output shaft of the driving component and the pipe opening connector. A pushing component that can move up and down along the rotating shaft is provided on the rotating shaft.

[0012] A wind deflector is movably connected to a rotating shaft. The wind deflector can be opened or folded. When the pusher moves toward the pipe connector, the pusher pushes the wind deflector, causing the wind deflector to gradually unfold and close the air outlet.

[0013] The wind deflector includes a first plate and a second plate that can be rotated and unfolded or folded relative to each other. The first plate has a first arc-shaped hole through which a rotating shaft can pass, and the second plate has a second arc-shaped hole through which a rotating shaft can pass. A torsion spring is provided between the first plate and the second plate to enable them to close automatically.

[0014] After being unfolded, the first plate and the second plate can abut against the front side of the pipe connector, and the radius of the first plate and the second plate is larger than the radius of the air outlet, so that the first plate and the second plate can close each of the air outlets when unfolded.

[0015] The connecting pipe is also provided with an inclined sliding surface that can guide the sliding of the first plate and the second plate.

[0016] The pipe connector includes an annular plate that can extend into the channel. The annular plate is provided with transverse reinforcing ribs. The middle of the reinforcing rib is provided with a through hole that can position the rotating shaft and allow the rotating shaft to rotate within it. The air outlet is located on both sides of the reinforcing rib.

[0017] The end of the connecting pipe is provided with a step that can position and support the pipe opening connector.

[0018] The connecting pipe includes a connecting pipe body, the connecting pipe body has a channel inside, and a cross-shaped connecting plate is provided on the connecting pipe body near the exhaust pipe. The driving component is connected to the connecting plate, the inclined sliding surface is provided along the wall of the channel, the pushing component is connected to the rotating shaft, and the two ends of the pushing component are provided with outwardly extending extension rods. The connecting pipe body is provided with a sliding groove that allows the extension rods to slide.

[0019] The exhaust pipe and the connecting pipe are provided with a first threaded connection assembly that can connect to both, and the connecting pipe and the flared pipe are provided with a second threaded connection assembly that can connect to both.

[0020] The flared tube includes a throat body and a conical diffuser body. The throat body is connected to the small end of the conical diffuser body, and the large end of the conical diffuser body is in communication with the external atmosphere. The inner wall of the throat body and the inner wall of the conical diffuser body form an annular space.

[0021] A gas water heater includes: an anti-backdraft device for gas water heaters as described above.

[0022] Compared with existing technologies, this utility model has the following advantages: When smoke exhaust is required, one end of the exhaust pipe can be connected to the exhaust component of the gas water heater to achieve normal smoke exhaust; when there is backflow from the outside, the drive component is activated, which drives the rotating shaft to rotate. At this time, the pusher moves along the rotating shaft toward the pipe opening connector. During the movement, the baffle plate gradually unfolds from the folded state and closes the air outlet, thereby preventing external wind and rain from backflowing and damaging the internal components. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the anti-backdraft device for the gas water heater of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the wind baffle plate of the anti-backdraft device for the gas water heater of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the exhaust pipe and pipe opening connection of the anti-backdraft device of the gas water heater of this utility model;

[0026] Figure 4 This is a cross-sectional view of the rotating shaft and the pushing component of the anti-backdraft device for the gas water heater of this utility model.

[0027] Labels: Exhaust pipe 1, bend 11, straight pipe 12, connecting pipe 2, channel 21, inclined surface 22, step 23, connecting pipe body 24, groove 241, connecting plate 25, flared pipe 3, throat body 31, conical diffuser body 32, annular space 33, pipe opening connector 4, air outlet 41, front side 42, annular plate 43, reinforcing rib 44, through hole 441, driving component 5, rotating shaft 6, pushing component 7, extension rod 71, wind baffle 8, first plate 81, second plate 82, first arc hole 811, second arc hole 821, torsion spring 83, first threaded connection assembly 91, second threaded connection assembly 92, anti-backdraft device for gas water heater 100. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to embodiments:

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] like Figures 1 to 4 As shown, a backdraft prevention device 100 for a gas water heater includes:

[0031] Exhaust pipe 1, which includes a bend 11 and a straight pipe 12 connected to one end of the bend 11;

[0032] Connecting pipe 2 is connected to one end of straight pipe 12 and is detachably connected to straight pipe 12;

[0033] A flared tube 3, one end of which is connected to the end of the connecting tube 2, and the diameter of the flared tube 3 gradually increases from the side near the connecting tube 2 to the other side of the flared tube 3.

[0034] Pipe connector 4 is disposed between the connecting pipe 2 and the flared pipe 3. The edge of the pipe connector 4 protrudes into the channel 21 of the connecting pipe 2. The pipe connector 4 has multiple air outlets 41 that can connect the connecting pipe 2 and the flared pipe 3.

[0035] A driving component 5 is connected to the connecting pipe 2, and a rotating shaft 6 is provided between the output shaft of the driving component 5 and the pipe opening connector 4. A pushing component 7 that can move up and down along the rotating shaft 6 is provided.

[0036] The wind deflector 8 is movably connected to the rotating shaft 6. The wind deflector 8 can be opened or folded. When the pusher 7 moves toward the pipe connector 4, the pusher 7 pushes the wind deflector 8, causing the wind deflector 8 to gradually unfold and close the air outlet 41.

[0037] When smoke is needed, one end of the exhaust pipe 1 is connected to the exhaust component of the gas water heater to achieve normal smoke exhaust. When there is backflow from the outside, the drive component 5 is activated, which drives the rotating shaft 6 to rotate. At this time, the pusher 7 moves along the rotating shaft 6 toward the pipe connector 4. During the movement, the baffle plate 8 gradually unfolds from the folded state and closes the air outlet 41, thereby preventing the backflow of external wind and rain from damaging the internal components.

[0038] The wind deflector 8 includes a first plate 81 and a second plate 82 that can be rotated and unfolded or folded relative to each other. The first plate 81 has a first arc-shaped hole 811 through which the rotating shaft 6 passes, and the second plate 82 has a second arc-shaped hole 821 through which the rotating shaft 6 passes. A torsion spring 83 is provided between the first plate 81 and the second plate 82 to allow them to close automatically. When the rotating shaft 6 rotates in the opposite direction, the pusher 7 moves in the opposite direction. At this time, the torsion spring 83 resets, which drives the first plate 81 and the second plate 82 to reset. At this time, the first plate 81 and the second plate 82 move from the unfolded position to the folded position. The first arc-shaped hole 811 and the second arc-shaped hole 821 cooperate to allow the rotating shaft 6 to pass through and to make way for the rotating shaft 6.

[0039] When unfolded, the first plate 81 and the second plate 82 can rest against the front side 42 of the pipe connector 4, which facilitates support for the first plate 81 and the second plate 82. Furthermore, the radii of the first plate 81 and the second plate 82 are larger than the radius of the air outlet 41, ensuring that the first plate 81 and the second plate 82 can completely seal each of the air outlets 41 when unfolded, resulting in a good sealing effect.

[0040] The connecting pipe 2 is also provided with a sloping surface 22 that can guide the sliding of the first plate 81 and the second plate 82, which facilitates the sliding and makes the wind deflector 8 fold more smoothly.

[0041] The pipe connector 4 includes an annular plate 43 that extends into the channel 21. The annular plate 43 has transverse reinforcing ribs 44, and each reinforcing rib 44 has a through hole 441 in its center, which positions and allows the rotating shaft 6 to rotate within it. The air outlet 41 is located on both sides of the reinforcing rib 44. The reinforcing ribs 44 improve the support capacity of the annular plate 43.

[0042] The end of the connecting pipe 2 is provided with a step 23 that can position and support the pipe end connector 4, which facilitates the placement of the pipe end connector 4. At the same time, when the flared pipe 3 and the connecting pipe 2 are installed in place, the pipe end connector 4 can be clamped.

[0043] The connecting pipe 2 includes a connecting pipe body 24, inside which a channel 21 is provided. A cross-shaped connecting plate 25 is provided on the connecting pipe body 24 near the exhaust pipe 1. The driving component 5 is connected to the connecting plate 25. The inclined sliding surface 22 is provided along the wall of the channel 21. The pushing component 7 is connected to the rotating shaft 6. Extension rods 71 ​​extending outwards are provided at both ends of the pushing component 7. The connecting pipe body 24 is provided with a sliding groove 241 for the extension rods 71 ​​to slide. The connecting plate 25 facilitates the installation of the driving component 5. Simultaneously, the extension rods 71 ​​allow the pushing component 7 to move along the rotating shaft 6 and push the windshield 8 when the rotating shaft 6 rotates.

[0044] The exhaust pipe 1 and the connecting pipe 2 are provided with a first threaded connection component 91 that can connect the two, and the connecting pipe 2 and the flared pipe 3 are provided with a second threaded connection component 92 that can connect the two. This connection method allows for faster connection, installation or disassembly, and facilitates subsequent cleaning and maintenance.

[0045] The flared tube 3 includes a throat tube 31 and a conical diffuser tube 32. The throat tube 31 is connected to the small end of the conical diffuser tube 32, and the large end of the conical diffuser tube 32 is connected to the external atmosphere. The inner wall of the throat tube 31 and the inner wall of the conical diffuser tube 32 form an annular space 33 with gradually increasing aperture to facilitate gas diffusion.

[0046] A gas water heater includes: an anti-backdraft device 100 for gas water heaters as described above.

[0047] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A backdraft prevention device for a gas water heater, characterized in that, include: The exhaust pipe (1) includes a bend (11) and a straight pipe (12) connected to one end of the bend (11). A connecting pipe (2) is connected to one end of a straight pipe (12) and is detachably connected to the straight pipe (12); A flared tube (3) is connected at one end to the end of a connecting tube (2), and the diameter of the flared tube (3) gradually increases from the side near the connecting tube (2) to the other side of the flared tube (3). Pipe connector (4) is disposed between the connecting pipe (2) and the flared pipe (3). The edge of the pipe connector (4) protrudes into the channel (21) of the connecting pipe (2). The pipe connector (4) has multiple air outlets (41) that can connect the connecting pipe (2) and the flared pipe (3). A drive unit (5) is connected to the connecting pipe (2), and a rotating shaft (6) is provided between the output shaft of the drive unit (5) and the pipe connector (4). A pusher (7) that can move up and down along the rotating shaft (6) is provided on the rotating shaft (6). A wind deflector (8) is movably connected to a rotating shaft (6). The wind deflector (8) can be opened or folded. When the pusher (7) moves toward the pipe connector (4), the pusher (7) pushes the wind deflector (8) so that the wind deflector (8) gradually unfolds and closes the air outlet (41).

2. The anti-backdraft device for a gas water heater according to claim 1, characterized in that, The wind deflector (8) includes a first plate (81) and a second plate (82) that can rotate and unfold or fold together. The first plate (81) is provided with a first arc-shaped hole (811) through which the rotating shaft (6) passes. The second plate (82) is provided with a second arc-shaped hole (821) through which the rotating shaft (6) passes. A torsion spring (83) is provided between the first plate (81) and the second plate (82) to enable them to close automatically.

3. The anti-backdraft device for a gas water heater according to claim 2, characterized in that, After being unfolded, the first plate (81) and the second plate (82) can abut against the front side (42) of the pipe connector (4), and the radius of the first plate (81) and the second plate (82) is greater than the radius of the air outlet (41), so that the first plate (81) and the second plate (82) can close each of the air outlets (41) when unfolded.

4. The anti-backdraft device for a gas water heater according to claim 2, characterized in that, The connecting pipe (2) is also provided with a sloping surface (22) that can guide the sliding of the first plate (81) and the second plate (82).

5. The anti-backdraft device for a gas water heater according to claim 1, characterized in that, The pipe connector (4) includes an annular plate (43) that can extend into the channel (21). The annular plate (43) is provided with a transverse reinforcing rib (44). The middle part of the reinforcing rib (44) is provided with a through hole (441) that can position the rotating shaft (6) and allow the rotating shaft (6) to rotate inside. The air outlet (41) is located on both sides of the reinforcing rib (44).

6. The anti-backdraft device for a gas water heater according to claim 1, characterized in that, The end of the connecting pipe (2) is provided with a step (23) that can position and support the pipe connector (4).

7. The anti-backdraft device for a gas water heater according to claim 4, characterized in that, The connecting pipe (2) includes a connecting pipe body (24), the connecting pipe body (24) is provided with the channel (21), and a cross-shaped connecting plate (25) is provided on the connecting pipe body (24) near the exhaust pipe (1). The driving member (5) is connected to the connecting plate (25). The inclined sliding surface (22) is provided along the wall of the channel (21). The push member (7) is connected to the rotating shaft (6). The two ends of the push member (7) are provided with outwardly extending extension rods (71). The connecting pipe body (24) is provided with a sliding groove (241) that allows the extension rods (71) to slide.

8. The anti-backdraft device for a gas water heater according to claim 1, characterized in that, A first threaded connection assembly (91) is provided between the exhaust pipe (1) and the connecting pipe (2) to connect the two, and a second threaded connection assembly (92) is provided between the connecting pipe (2) and the flared pipe (3) to connect the two.

9. The anti-backdraft device for a gas water heater according to claim 1, characterized in that, The flared tube (3) includes a throat tube body (31) and a conical diffuser tube body (32). The throat tube body (31) is connected to the small end of the conical diffuser tube body (32). The large end of the conical diffuser tube body (32) is connected to the external atmosphere. The inner wall of the throat tube body (31) and the inner wall of the conical diffuser tube body (32) form an annular space (33).

10. A gas water heater, characterized in that, include: The backdraft prevention device (100) for a gas water heater as described in any one of claims 1 to 9.

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