Smoke pipe and gas water heating equipment
By introducing accelerating pipe sections and atomizing smoke exhaust devices into the smoke pipes of gas water heaters, the problem of building corrosion caused by the short smoke emission distance is solved, and smoke emission over longer distances and noise reduction are achieved.
Patent Information
- Application Number
- CN202422844818.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-20
AI Technical Summary
The smoke exhaust distance of the gas water heater is short, which causes the smoke to adhere to the surface of the building and cause corrosion.
A smoke pipe is designed, which includes an accelerating pipe section with a gradually decreasing inner diameter to accelerate the flow of smoke, and treats condensed water through an atomizing smoke exhaust device and a condensed water neutralization device to increase the smoke exhaust distance.
Effectively increase the smoke emission distance, reduce corrosion to surrounding buildings, reduce smoke emission noise, and improve smoke exhaust efficiency.
Smart Images
Figure CN223399936U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas water heaters, in particular to a smoke pipe and gas water heaters. Background Art
[0002] Gas water heating equipment (such as gas water heaters, wall-mounted boilers, etc.) generally discharges smoke to the outside through a smoke pipe. The length of the smoke pipe extending outdoors is usually short, resulting in a short distance for the smoke to be discharged. As a result, a large amount of discharged smoke adheres to the surface of buildings near the smoke pipe outlet (such as walls, doors and windows, etc.). The smoke usually contains acidic condensed water, which can easily cause corrosion on the building surface and affect the life of the building. Utility Model Content
[0003] The main purpose of the utility model is to provide a smoke pipe and a gas water heater, aiming to make the smoke exhaust distance of the smoke pipe farther and reduce the corrosion to the surrounding buildings.
[0004] To achieve the above-mentioned purpose, the utility model proposes a smoke pipe, which is used for gas water heating equipment. The smoke pipe has a smoke inlet end for allowing smoke to enter, and a smoke outlet end for allowing smoke to be discharged. The smoke pipe includes an acceleration tube section arranged between the smoke inlet end and the smoke outlet end. The inner diameter of the acceleration tube section is gradually reduced in the direction from the smoke inlet end toward the smoke outlet end. The acceleration tube section is used to accelerate the smoke entering the interior and guide it to the smoke outlet end.
[0005] In one embodiment, the smoke pipe further includes a smoke inlet pipe section, one end of which is connected to the wide end of the accelerating pipe section, and the inner diameter of the smoke inlet pipe section is not smaller than the inner diameter of the wide end of the accelerating pipe section.
[0006] In one embodiment, the smoke inlet pipe section is configured as a straight pipe section coaxially extending with the accelerating pipe section, and the inner diameter of the smoke inlet pipe section is equal to the inner diameter of the wide end of the accelerating pipe section;
[0007] And / or, the accelerating tube section includes a first tube section connected to the smoke inlet tube section, and a second tube section arranged at one end of the first tube section away from the smoke inlet tube section, the end surface of the second tube section away from the end of the first tube section is closed, and the peripheral wall of the second tube section is provided with multiple smoke outlets.
[0008] In one embodiment, the smoke pipe further includes a smoke outlet pipe section, one end of which is connected to the narrow end of the accelerating pipe section, and the inner diameter of the smoke outlet pipe section is not greater than the inner diameter of the narrow end of the accelerating pipe section.
[0009] In one embodiment, the smoke outlet pipe section is configured as a straight pipe section coaxially extending with the accelerating pipe section, and the inner diameter of the smoke outlet pipe section is equal to the inner diameter of the narrow end of the accelerating pipe section;
[0010] And / or, the end surface of the smoke outlet pipe section away from the accelerating pipe section is closed, and the peripheral wall of the smoke outlet pipe section is provided with a plurality of smoke outlet holes.
[0011] In one embodiment, the smoke pipe is configured as a stainless steel pipe;
[0012] And / or, the smoke inlet pipe section, the acceleration pipe section and the smoke outlet pipe section are spliced and fixed.
[0013] In one embodiment, on a projection plane parallel to the axis of the accelerating tube segment, an inclination angle of an edge line of the accelerating tube segment relative to the axis of the accelerating tube segment is α, wherein α is greater than 0 degrees and less than 5 degrees;
[0014] And / or, the cross-sectional size of the wide end of the accelerating tube section is S1, and the cross-sectional size of the narrow end of the accelerating tube section is S2, wherein S2 is not less than 60% of S1.
[0015] The utility model also provides a gas water heater, comprising:
[0016] the device body; and
[0017] As for the smoke pipe as described above, the smoke inlet end of the smoke pipe is connected to the device body.
[0018] In one embodiment, the gas water heater further includes an atomizing smoke exhaust device, which connects the device body with the smoke inlet end of the smoke pipe. The atomizing smoke exhaust device is used to collect the smoke and condensed water generated when the device body is in operation, and to atomize the condensed water and transport it to the smoke pipe together with the smoke.
[0019] In one embodiment, the gas water heater further comprises a condensed water neutralization device, which is used to neutralize the condensed water generated by the operation of the main body of the device and transport it to the atomizing smoke exhaust device.
[0020] The technical solution of this utility model is to provide the flue pipe with an acceleration pipe section. After the flue gas generated by the operation of the gas water heater enters the flue pipe, as it passes through the acceleration pipe section, the inner diameter of the acceleration pipe section gradually decreases. Accordingly, the flow cross-sectional area of the flow channel inside the acceleration pipe section also gradually decreases, thereby increasing the airflow (flue gas) speed and reducing the pressure in the acceleration pipe section. This design maximizes the flue gas speed at the flue pipe outlet, thereby achieving effective flue gas acceleration and increasing the exhaust distance of the flue pipe. This allows the flue gas entrained with condensed water to be discharged further, thereby quickly moving away from buildings near the flue pipe outlet (walls / doors and windows, etc.), thereby reducing corrosion to surrounding buildings. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0022] Figure 1 A schematic structural diagram of an embodiment of a smoke tube provided by the present utility model;
[0023] Figure 2 for Figure 1 Main view of the middle smoke tube;
[0024] Figure 3 A structural schematic diagram of another embodiment of the smoke pipe provided by the utility model;
[0025] Figure 4 for Figure 3 Front view of the middle smoke tube.
[0026] Description of Figure Numbers:
[0027] 10. Smoke pipe; 10a. Smoke inlet end; 10b. Smoke outlet end; 101. Smoke outlet; 11. Accelerating pipe section; 111. First pipe section; 112. Second pipe section; 12. Smoke inlet pipe section; 13. Smoke outlet pipe section.
[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.
[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0032] Gas water heating equipment (such as gas water heaters, wall-mounted boilers, etc.) generally discharges smoke to the outside through a smoke pipe. The length of the smoke pipe extending outdoors is usually short, resulting in a short distance for the smoke to be discharged. As a result, a large amount of discharged smoke adheres to the surface of buildings near the smoke pipe outlet (such as walls, doors and windows, etc.). The smoke usually contains acidic condensed water, which can easily cause corrosion on the building surface and affect the life of the building.
[0033] The utility model provides a smoke pipe 10. When applied to a gas water heater, the smoke generated by the gas water heater can be discharged outdoors through the smoke pipe 10, and long-distance smoke exhaust can be achieved, thereby reducing corrosion to surrounding buildings.
[0034] See also Figure 1 and Figure 3In some embodiments of the present invention, the smoke pipe 10 has a smoke inlet end 10a for smoke to enter, and a smoke outlet end 10b for smoke to be discharged. The smoke pipe 10 includes an acceleration tube section 11 arranged between the smoke inlet end 10a and the smoke outlet end 10b. The inner diameter of the acceleration tube section 11 is gradually reduced in the direction from the smoke inlet end 10a toward the smoke outlet end 10b. The acceleration tube section 11 is used to accelerate the smoke entering the interior and guide it to the smoke outlet end 10b.
[0035] The smoke pipe 10 can be applied to gas water heaters. The smoke inlet end 10a of the smoke pipe 10 is used to communicate with the main body of the gas water heater, and the smoke outlet end 10b of the smoke pipe 10 is used to extend to the outside. In this way, the smoke generated by the operation of the main body of the equipment enters the smoke pipe 10 and can be discharged to the outside along the smoke pipe 10. Usually, the installed smoke pipe 10 is arranged to extend horizontally and has a certain inclination angle relative to the horizontal plane. For condensing gas water heaters, in order to avoid the condensed water at the outlet of the smoke pipe 10 from dripping, it is usually necessary to tilt the smoke pipe 10 upward at a certain angle relative to the horizontal plane so that the generated condensed water can flow back to the inside of the machine along the smoke pipe 10. Among them, the gas water heater includes but is not limited to a gas water heater, a wall-mounted boiler or other equipment that can generate smoke. In the following embodiments, a gas water heater with the smoke pipe 10 is mainly used as an example for description.
[0036] The gas water heater includes an equipment body and a smoke pipe 10. The equipment body may include components such as a burner, a combustion chamber body, a heat exchanger, and a fan. A flue is formed inside the combustion chamber body to connect the burner and the heat exchanger. When the gas water heater is working, driven by the fan, the high-temperature flue gas generated by the burner combustion is transported to the heat exchanger through the flue inside the combustion chamber body. The high-temperature flue gas exchanges heat with the heat exchanger to heat the water in the heat exchanger. The flue gas after heat exchange is discharged to the outside through the smoke pipe 10. When the gas water heater is configured as a condensing gas water heater, the heat exchanger may include a main heat exchanger and a condensing heat exchanger that are interconnected. External cold water is first transported to the condensing heat exchanger through the water inlet pipe for preheating, and then transported to the main heat exchanger for heating. The heated hot water is transported to the water end through the water outlet pipe. Among them, the gas water heater can be configured as a strong drum type gas water heater with a fan placed below, or as a strong extraction type gas water heater with a fan placed above; the gas water heater can be configured as a normal burning gas water heater with a burner placed below, or as a reverse burning gas water heater with a burner placed above. There is no specific limitation on the specific model here, as long as it can be adapted to the smoke pipe 10 of the present invention.
[0037] In this embodiment, the smoke pipe 10 is hollow and cylindrical, with a flow channel for a fluid (such as flue gas) to pass through it. The cross-sectional shape of the flow channel within each section of the smoke pipe 10 includes, but is not limited to, circular, square, or other shapes. The inner diameter of the accelerating section 11 gradually decreases from the smoke inlet end 10a of the smoke pipe 10 toward the smoke outlet end 10b. The accelerating section 11 is a variable diameter tube structure. The end of the accelerating section 11 near the smoke inlet end 10a has the largest opening, representing the wide end of the accelerating section 11, and the end of the accelerating section 11 near the smoke outlet end 10b has the smallest opening, representing the narrow end of the accelerating section 11. To reduce airflow resistance, the flow channel cross-section within each section of the smoke pipe 10 can optionally be circular. This allows the accelerating section 11 to be configured as a truncated cone-shaped tapered section. The tapered accelerating section 11 can accelerate the airflow by utilizing the pressure drop of the gas. The accelerating section 11 can be configured as one, two, or more sections, depending on the actual situation. When the smoke pipe 10 has multiple acceleration sections 11, multi-stage acceleration can be achieved. The following mainly uses the smoke pipe 10 equipped with a section of acceleration section 11 as an example for explanation. For example, the smoke pipe 10 can be designed to be tapered from the smoke inlet end 10a toward the smoke outlet end 10b. At this time, the entire smoke pipe 10 is the acceleration section 11. Alternatively, the smoke pipe 10 may include a smoke inlet section 12 and an acceleration section 11 provided at one end of the smoke inlet section 12. The smoke first enters the smoke inlet section 12, then flows to the acceleration section 11 for acceleration and then is discharged. Alternatively, the smoke pipe 10 may include an acceleration section 11 and a smoke outlet section 13 provided at one end of the acceleration section 11. After the smoke enters the acceleration section 11 for acceleration, it flows to the smoke outlet section 13 for discharge. Alternatively, the smoke pipe 10 may include a smoke inlet pipe section 12 , an acceleration pipe section 11 and a smoke outlet pipe section 13 connected in sequence. The smoke first enters the smoke inlet pipe section 12 , then flows to the acceleration pipe section 11 for acceleration, and finally is discharged through the smoke outlet pipe section 13 .
[0038] The technical solution of the present invention is to provide the flue pipe 10 with an accelerating pipe section 11. After the flue gas generated by the operation of the gas water heater enters the flue pipe 10 and passes through the accelerating pipe section 11, the inner diameter of the accelerating pipe section 11 gradually decreases. Accordingly, the flow cross-sectional area of the flow channel inside the accelerating pipe section 11 also gradually decreases, thereby increasing the airflow (flue gas) velocity and reducing the pressure within the accelerating pipe section 11. This design maximizes the flue gas velocity at the outlet of the flue pipe 10, thereby achieving effective flue gas acceleration and increasing the exhaust distance of the flue pipe 10. This allows the flue gas entrained with condensed water to be discharged further, thereby moving away from buildings (walls / doors and windows, etc.) near the outlet of the flue pipe 10 as quickly as possible to reduce corrosion to surrounding buildings.
[0039] like Figure 1 and Figure 2As shown, in one embodiment, the smoke pipe 10 further includes a smoke inlet pipe section 12 , one end of which is connected to the wide end of the accelerating pipe section 11 , and the inner diameter of the smoke inlet pipe section 12 is not smaller than the inner diameter of the wide end of the accelerating pipe section 11 .
[0040] In this embodiment, the smoke duct 10 includes a smoke inlet section 12 and an acceleration section 11 that are interconnected. The end of the smoke inlet section 12 away from the acceleration section 11 can serve as the smoke inlet end 10a of the smoke duct 10, and the end of the acceleration section 11 away from the smoke inlet section 12 can serve as the smoke outlet end 10b of the smoke duct 10. The smoke inlet section 12 can be configured as a straight section extending in a straight line or a curved section extending in a curve. In order to reduce smoke resistance, the smoke inlet section 12 can optionally be configured as a circular straight section. In order to allow the smoke generated by the gas water heater to enter the interior of the smoke duct 10 more smoothly, the inner diameter of the smoke inlet section 12 is not less than the inner diameter of the wide end of the acceleration section 11. For example, the inner diameter of the smoke inlet section 12 can be equal to the inner diameter of the wide end of the acceleration section 11, or slightly larger than the inner diameter of the wide end of the acceleration section 11.
[0041] In order to further reduce the flow resistance of the smoke in the smoke pipe 10, the smoke exhaust distance of the smoke pipe 10 is increased. Figure 2 As shown, in one embodiment, the smoke inlet pipe section 12 is configured as a straight pipe section extending coaxially with the acceleration pipe section 11 , and the inner diameter of the smoke inlet pipe section 12 is equal to the inner diameter of the wide end of the acceleration pipe section 11 .
[0042] In this embodiment, the smoke inlet section 12 is configured as a straight section extending coaxially with the acceleration section 11, so that the connection between the smoke inlet section 12 and the acceleration section 11 does not produce a corner structure that increases smoke resistance. In addition, the inner diameter of the smoke inlet section 12 is equal to the inner diameter of the wide end of the acceleration section 11, so that the connection between the smoke inlet section 12 and the wide end of the acceleration section 11 can be smoothly transitioned without a step structure that would generate smoke resistance. In this way, the smoke in the smoke inlet section 12 can smoothly enter the acceleration section 11 for acceleration without changing the smoke flow direction. This reduces the smoke flow resistance in the smoke duct 10, makes the smoke flow smoother, facilitates smoke acceleration, increases the smoke exhaust distance of the smoke duct 10, and reduces smoke emission noise.
[0043] like Figure 1 As shown, in one embodiment, the accelerating tube segment 11 includes a first tube segment 111 connected to the smoke inlet tube segment 12, and a second tube segment 112 provided at an end of the first tube segment 111 away from the smoke inlet tube segment 12, the end surface of the second tube segment 112 away from the end of the first tube segment 111 is closed, and a plurality of smoke outlet holes 101 are provided on the peripheral wall of the second tube segment 112.
[0044] In this embodiment, the accelerating tube section 11 includes a first tube section 111 and a second tube section 112 that are interconnected. The first tube section 111 and the second tube section 112 are both configured as tapered tube sections and are smoothly connected. The first tube section 111 and the second tube section 112 can be an integrally formed structure, and there is no obvious dividing line at the connection between the two tube sections; alternatively, the first tube section 111 and the second tube section 112 can be configured as separate parts that are then spliced together. The end of the first tube section 111 away from the second tube section 112 is the wide end of the accelerating tube section 11, and the end of the second tube section 112 away from the first tube section 111 is the narrow end of the accelerating tube section 11. The end surface of the second tube section 112 away from the first tube section 111 is closed, and a plurality of smoke outlets 101 are provided on the peripheral wall of the second tube section 112, so that the smoke outlet end 10b of the smoke pipe 10 is formed in the second tube section 112. The smoke in the smoke inlet section 12 enters the first section 111 of the acceleration section 11, where it is accelerated and then flows into the second section 112. Within the second section 112, the smoke is further accelerated and discharged through the multiple smoke outlets 101 on the peripheral wall of the second section 112. The smoke outlets 101 can be shaped as circular, square, strip-shaped, or other special-shaped holes as needed. Optionally, the smoke outlets 101 are circular, which simplifies the manufacturing process of the smoke outlets 101. Optionally, the multiple smoke outlets 101 are evenly distributed in an array on the peripheral wall of the second section 112.
[0045] By closing one end of the second pipe section 112 away from the first pipe section 111 and providing a plurality of smoke outlet holes 101 on the peripheral wall of the second pipe section 112, it is possible to prevent smoke from being discharged directly from the end face of the second pipe section 112, so that smoke can be diffused and discharged from the peripheral wall of the second pipe section 112. In this way, the natural convection principle of the flue can be more effectively utilized to form a vortex in the smoke pipe 10, thereby increasing the contact area between the smoke and the inner wall of the smoke pipe 10, thereby more fully discharging the smoke. In contrast, if the smoke outlet is directly provided on the end face of the smoke pipe 10, it may cause poor smoke discharge or local accumulation, increasing safety hazards. In addition, providing a plurality of smoke outlet holes 101 on the peripheral wall of the second pipe section 112 is conducive to the uniform distribution of smoke in the smoke pipe 10, improving the smoke exhaust speed and efficiency, and ensuring that the smoke can be quickly and effectively discharged outdoors. Furthermore, when negative pressure is generated inside or outside the smoke exhaust duct 10 (e.g., due to strong winds or a drop in indoor air pressure), placing the smoke outlet directly on the smoke duct 10 may increase the risk of air backflow into the water heater. However, the design of multiple smoke outlet holes 101 on the peripheral wall of the second pipe section 112 can reduce this backflow phenomenon to a certain extent, as the vortex formed by the smoke in the smoke duct 10 creates a certain resistance to the backflow of air.
[0046] like Figure 3 and Figure 4As shown, in another embodiment, the smoke pipe 10 further includes a smoke outlet pipe section 13, one end of the smoke outlet pipe section 13 is connected to the narrow end of the accelerating pipe section 11, and the inner diameter of the smoke outlet pipe section 13 is not greater than the inner diameter of the narrow end of the accelerating pipe section 11.
[0047] In this embodiment, the smoke duct 10 includes a smoke inlet section 12, an acceleration section 11, and a smoke outlet section 13 connected in sequence. This can further extend the overall length of the smoke duct 10, which is beneficial for further improving the smoke exhaust distance of the smoke duct 10. The end of the smoke inlet section 12 away from the acceleration section 11 can serve as the smoke inlet end 10a of the smoke duct 10, and the end of the smoke outlet section 13 away from the acceleration section 11 can serve as the smoke outlet end 10b of the smoke duct 10. The smoke inlet section 12 and / or the smoke outlet section 13 can be configured as a straight section extending in a straight line or a curved section extending in a curve. In order to reduce smoke resistance, the smoke inlet section 12 and the smoke outlet section 13 can optionally be configured as circular straight sections. In order to avoid a significant decrease in the flow velocity of the smoke after being accelerated by the acceleration section 11 in the smoke outlet section 13, the inner diameter of the smoke outlet section 13 is not larger than the inner diameter of the narrow end of the acceleration section 11. For example, the inner diameter of the smoke outlet tube section 13 may be equal to the inner diameter of the narrow end of the accelerating tube section 11 , or slightly smaller than the inner diameter of the narrow end of the accelerating tube section 11 .
[0048] In order to further reduce the flow resistance of the smoke in the smoke pipe 10, the smoke exhaust distance of the smoke pipe 10 is increased. Figure 4 As shown, in one embodiment, the smoke outlet pipe section 13 is configured as a straight pipe section extending coaxially with the accelerating pipe section 11 , and the inner diameter of the smoke outlet pipe section 13 is equal to the inner diameter of the narrow end of the accelerating pipe section 11 .
[0049] In this embodiment, the smoke outlet section 13 is configured as a straight section extending coaxially with the accelerating section 11. This prevents the connection between the smoke outlet section 13 and the accelerating section 11 from creating a corner structure that would increase smoke resistance. Furthermore, the inner diameter of the smoke outlet section 13 is equal to the inner diameter of the narrow end of the accelerating section 11, allowing for a smooth transition between the two narrow ends without creating a step structure that would otherwise create smoke resistance. This allows smoke within the accelerating section 11 to smoothly enter the smoke outlet section 13 without changing its flow direction. This reduces smoke flow resistance within the smoke pipe 10, allowing for smoother smoke flow, facilitating smoke acceleration, increasing the smoke exhaust distance of the smoke pipe 10, and reducing smoke emission noise.
[0050] like Figure 3 As shown, in one embodiment, the end surface of the smoke outlet pipe section 13 away from the accelerating pipe section 11 is closed, and a plurality of smoke outlet holes 101 are provided on the peripheral wall of the smoke outlet pipe section 13 .
[0051] In this embodiment, the smoke in the smoke inlet pipe section 12 enters the acceleration pipe section 11 for acceleration and then flows into the smoke outlet pipe section 13, and is discharged from the multiple smoke outlet holes 101 on the peripheral wall of the smoke outlet pipe section 13. The shape of the smoke outlet hole 101 can be designed as a circular hole, a square hole, a strip hole or other special-shaped holes as needed. Optionally, the smoke outlet hole 101 is a circular hole, which can simplify the manufacturing process of the smoke outlet hole 101. Optionally, the multiple smoke outlet holes 101 are evenly distributed in an array on the peripheral wall of the smoke outlet pipe section 13 away from the acceleration pipe section 11. By closing the end of the smoke outlet pipe section 13 away from the acceleration pipe section 11 and providing multiple smoke outlet holes 101 on the peripheral wall of the smoke outlet pipe section 13, it is possible to prevent the smoke from being directly discharged from the end face of the smoke outlet pipe section 13, so that the smoke can be diffused and discharged from the peripheral wall of the smoke outlet pipe section 13. In this way, the natural convection principle of the flue can be more effectively utilized, so that the smoke forms a vortex in the smoke pipe 10, increasing the contact area between the smoke and the inner wall of the smoke pipe 10, thereby more fully exhausting the smoke. In contrast, if the smoke outlet is directly set on the end face of the smoke pipe 10, it may cause poor smoke discharge or local accumulation, increasing safety hazards. In addition, a plurality of smoke outlet holes 101 are provided on the peripheral wall of the smoke pipe section 13, which is conducive to the uniform distribution of smoke in the smoke pipe 10, improving the speed and efficiency of smoke exhaust, and ensuring that the smoke can be quickly and effectively discharged outdoors. In addition, when the internal or external environment of the smoke exhaust pipe 10 generates negative pressure (such as strong wind or reduced indoor air pressure), if the smoke outlet is directly set on the smoke pipe 10, it may increase the risk of air backflow into the water heater. The design of multiple smoke outlet holes 101 on the peripheral wall of the smoke pipe section 13 can reduce the occurrence of this backflow phenomenon to a certain extent because the vortex formed by the smoke in the smoke pipe 10 will generate a certain resistance to the backflow air.
[0052] In one embodiment, the smoke pipe 10 is configured as a stainless steel pipe. The smoke pipe 10 is made of stainless steel, so that the smoke pipe 10 has high structural strength and good heat resistance and corrosion resistance.
[0053] To simplify the manufacturing process of the smoke pipe 10, the smoke inlet pipe section 12, the accelerating pipe section 11, and the smoke outlet pipe section 13 can optionally be spliced and fixed. In actual production, the smoke inlet pipe section 12, the accelerating pipe section 11, and the smoke outlet pipe section 13 can be formed separately through a tube rolling process, and then the adjacent pipe sections can be spliced and fixed. The adjacent pipe sections can be fixed by methods including, but not limited to, welding, riveting, clamping, etc.
[0054] In order to ensure that the accelerating pipe section 11 can achieve a better acceleration effect on the flue gas and prevent the inclination angle of the accelerating pipe section 11 from being too large to increase the flue gas resistance, based on the above embodiment, as Figure 2 and Figure 4As shown, in some embodiments, on a projection plane parallel to the axis of the accelerating tube segment 11, the inclination angle of the edge line of the accelerating tube segment 11 relative to the axis of the accelerating tube segment 11 is α, where α is greater than 0 degrees and less than 5 degrees. That is, 0°<α<5°. For example, the inclination angle α can be 1°, 2°, 3°, 4°, etc.
[0055] In order to ensure that the accelerating pipe section 11 can achieve a better acceleration effect on the flue gas and prevent the narrow end of the accelerating pipe section 11 from having too small a flow cross-sectional area and increasing the flue gas resistance, based on the above embodiment, as Figure 2 and Figure 4 As shown, in some embodiments, the cross-sectional dimension of the wide end of the accelerating tube section 11 is S1, and the cross-sectional dimension of the narrow end of the accelerating tube section 11 is S2, where S2 is not less than 60% of S1. That is, 60% S1 ≤ S2 < S1. For example, S2 can be 60% S1, 70% S1, 80% S1, 90% S1, etc.
[0056] The present invention also provides a gas water heater, comprising a main body and a flue pipe 10, the flue pipe 10 having a flue gas inlet end 10a connected to the main body. The specific structure of the flue pipe 10 is similar to that of the aforementioned embodiments. Since the present gas water heater utilizes all the technical solutions of all the aforementioned embodiments, it possesses at least all the beneficial effects of the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated here. The gas water heater includes, but is not limited to, a gas water heater, a wall-mounted boiler, or other equipment capable of generating flue gas.
[0057] In one embodiment, the gas water heater further includes an atomizing smoke exhaust device, which connects the device body with the smoke inlet end 10a of the smoke pipe 10. The atomizing smoke exhaust device is used to collect the smoke and condensed water generated when the device body is in operation, and to atomize the condensed water and transport it to the smoke pipe 10 together with the smoke.
[0058] In this embodiment, taking the gas water heater as an example, the gas water heater includes an equipment body, a smoke pipe 10 and an atomizing smoke exhaust device. The equipment body includes a burner, a combustion chamber box, a heat exchanger and a fan. A flue is formed inside the combustion chamber box to connect the burner and the heat exchanger. The heat exchanger may include a main heat exchanger and a condensing heat exchanger that are connected to each other. The atomizing smoke exhaust device may include a smoke hood and an atomizing module, and the smoke pipe 10 is connected to the outlet of the smoke hood. The smoke hood is used to collect the flue gas after heat exchange in the condensing heat exchanger and the condensed water generated by the condensing heat exchanger. The atomizing module is used to atomize the condensed water in the smoke hood. The atomized condensed water can flow into the smoke pipe 10 through the pipe of the smoke hood together with the flue gas, and then be discharged to the outside through the smoke pipe 10. Since the flue gas carries a large amount of atomized condensed water, and the atomized condensed water is acidic, it is very easy to cause corrosion to the buildings near the outlet of the smoke pipe 10 (such as walls, doors and windows, etc.). By adopting the above-mentioned design of the smoke pipe 10, the flue gas can be effectively accelerated, and the smoke exhaust distance of the smoke pipe 10 can be increased, so that the flue gas carrying condensed water can be discharged farther, thereby moving away from the buildings near the outlet of the smoke pipe 10 (walls / doors and windows, etc.) as soon as possible to reduce corrosion to surrounding buildings.
[0059] In order to further reduce corrosion to buildings around the outlet of the smoke pipe 10, in one embodiment, the gas water heater further includes a condensed water neutralization device, which is used to neutralize the condensed water generated by the operation of the equipment body and transport it to the atomizing smoke exhaust device.
[0060] In this embodiment, the acidic condensate generated by the gas water heater first enters the condensate neutralization device and is neutralized with the alkaline substance in the condensate neutralization device to convert the acidic condensate into neutral condensate. The neutral condensate is then collected by the atomizing smoke exhaust device and atomized before being discharged from the smoke pipe 10 along with the smoke. This reduces the acidity of the smoke containing condensate discharged from the smoke pipe 10 and, combined with a longer smoke exhaust distance, can further effectively reduce corrosion to surrounding buildings.
[0061] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A smoke pipe for a gas water heater, characterized in that: The smoke pipe has a smoke inlet end for smoke to enter, and a smoke outlet end for smoke to be discharged. The smoke pipe includes an acceleration tube section arranged between the smoke inlet end and the smoke outlet end. The inner diameter of the acceleration tube section is gradually reduced in the direction from the smoke inlet end toward the smoke outlet end. The acceleration tube section is used to accelerate the smoke entering the interior thereof and guide it to the smoke outlet end.
2. The smoke pipe according to claim 1, characterized in that The smoke pipe further includes a smoke inlet pipe section, one end of which is connected to the wide end of the accelerating pipe section, and the inner diameter of the smoke inlet pipe section is not smaller than the inner diameter of the wide end of the accelerating pipe section.
3. The smoke pipe according to claim 2, characterized in that The smoke inlet pipe section is configured as a straight pipe section coaxially extending with the accelerating pipe section, and the inner diameter of the smoke inlet pipe section is equal to the inner diameter of the wide end of the accelerating pipe section; And / or, the accelerating tube section includes a first tube section connected to the smoke inlet tube section, and a second tube section arranged at one end of the first tube section away from the smoke inlet tube section, the end surface of the second tube section away from the end of the first tube section is closed, and the peripheral wall of the second tube section is provided with multiple smoke outlets.
4. The smoke pipe according to claim 2, wherein: The smoke pipe further includes a smoke outlet pipe section, one end of which is connected to the narrow end of the accelerating pipe section, and the inner diameter of the smoke outlet pipe section is not greater than the inner diameter of the narrow end of the accelerating pipe section.
5. The smoke pipe according to claim 4, characterized in that: The smoke outlet pipe section is configured as a straight pipe section coaxially extending with the accelerating pipe section, and the inner diameter of the smoke outlet pipe section is equal to the inner diameter of the narrow end of the accelerating pipe section; And / or, the end surface of the smoke outlet pipe section away from the accelerating pipe section is closed, and the peripheral wall of the smoke outlet pipe section is provided with a plurality of smoke outlet holes.
6. The cigarette pipe according to claim 4, characterized in that The smoke pipe is configured as a stainless steel pipe; And / or, the smoke inlet pipe section, the acceleration pipe section and the smoke outlet pipe section are spliced and fixed.
7. The smoke tube according to any one of claims 1 to 6, characterized in that On a projection plane parallel to the axis of the accelerating tube section, the inclination angle of the edge line of the accelerating tube section relative to the axis of the accelerating tube section is α, wherein α is greater than 0 degrees and less than 5 degrees; And / or, the cross-sectional size of the wide end of the accelerating tube section is S1, and the cross-sectional size of the narrow end of the accelerating tube section is S2, wherein S2 is not less than 60% of S1.
8. A gas water heater, characterized in that: include: Equipment body; as well as The smoke tube according to any one of claims 1 to 7, wherein the smoke inlet end of the smoke tube is connected to the device body.
9. The gas water heater according to claim 8, characterized in that: The gas water heater also includes an atomizing smoke exhaust device, which connects the device body with the smoke inlet end of the smoke pipe. The atomizing smoke exhaust device is used to collect the smoke and condensed water generated when the device body is in operation, and to atomize the condensed water and transport it to the smoke pipe together with the smoke.
10. The gas water heater according to claim 9, characterized in that: The gas water heater further comprises a condensed water neutralization device, which is used to neutralize the condensed water generated during the operation of the main body of the device and transport the condensed water to the atomizing smoke exhaust device.