Smoke exhaust device and water heater
By employing a smoke exhaust device with a collection hood and atomizing module in the water heater, water mist is mixed with flue gas to form a multiphase medium, and the water mist is controlled to enter the smoke exhaust channel. This solves the problems of low-frequency noise and flow resistance in traditional water heaters, and achieves efficient noise reduction and smoke exhaust effects.
Patent Information
- Application Number
- CN202422925177.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-27
AI Technical Summary
In the exhaust system of traditional water heaters, a large expansion chamber is required for mid-to-low frequency noise reduction, and the acoustic impedance mismatch between flue gas and water vapor mixture leads to increased flow resistance, affecting exhaust efficiency.
The smoke exhaust device, which uses a collection hood and an atomizing module, mixes atomized condensate with flue gas to form a multiphase mixed medium. The water mist is controlled to enter the smoke exhaust channel by using a flow restriction area to reduce the gas content and improve the noise reduction effect.
Without sacrificing smoke extraction efficiency, it effectively improves the noise reduction effect of low and medium frequency noise and enhances the emission performance of the smoke extraction device.
Smart Images
Figure CN223499799U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water heater technology, and in particular to a smoke exhaust device and a water heater. Background Technology
[0002] Traditional water heater silencers have a relatively uniform internal medium, consisting only of high-temperature flue gas. The medium's properties don't change significantly with the silencer's internal impedance and reactive structure, often requiring a large expansion chamber to reduce low-to-mid-frequency noise. Based on this, and considering the impedance mismatch between water and air media, a small-volume wet exhaust silencer system is proposed to address the issue of requiring a large expansion chamber for low-to-mid-frequency exhaust noise in traditional systems. The wet exhaust silencer system utilizes the property of water vapor directly mixing with flue gas to form a multiphase mixture for noise reduction. It increases the amount of water mist mixed in the flue gas by reducing the proportion of water mist, thereby lowering the exhaust temperature and achieving low-to-mid-frequency noise reduction. The proportion of water mist in the flue gas is called the air content. While a decrease in air content increases the acoustic impedance of the flue gas and water vapor mixture, which can block noise from the flue gas, it also increases flow resistance, hindering flue gas removal. At higher air content, the flue gas and steam cannot form an impedance mismatch, resulting in insignificant low-to-mid-frequency noise reduction performance. Utility Model Content
[0003] The main purpose of this utility model is to propose a smoke exhaust device and a water heater, which aims to improve the noise reduction effect of the smoke exhaust device without sacrificing the smoke exhaust efficiency.
[0004] To achieve the above objectives, the smoke extraction device proposed in this utility model includes:
[0005] The collection hood is equipped with an atomizing chamber for collecting condensate.
[0006] An atomizing module, disposed in the collection shroud, is used to atomize the condensate in the atomizing chamber; and
[0007] A smoke exhaust pipe is provided at the collection hood. The smoke exhaust pipe has a smoke inlet, a smoke outlet, and a smoke exhaust channel connecting the smoke inlet and the smoke outlet. The smoke inlet is connected to the atomizing chamber. The end of the smoke exhaust pipe away from the smoke outlet forms a flow restriction area around the smoke inlet. The flow restriction area is used to restrict the atomized water mist from entering the smoke exhaust channel.
[0008] In one embodiment, the exhaust pipe includes an inlet section, an exhaust section and a flow-limiting section communicating with the inlet section. The inlet section is located at the top of the collection hood and communicates with the atomizing chamber. The exhaust section extends upward from the top of the inlet section and has an exhaust port at its top. The flow-limiting section extends downward from the bottom of the exhaust section and has an inlet at its bottom. The flow-limiting section extends into the inlet section, and a flow-limiting area is formed between the outer peripheral surface of the flow-limiting section and the inner peripheral surface of the inlet section.
[0009] In one embodiment, the inlet section is flared outwards toward the atomizing chamber.
[0010] In one embodiment, the peripheral wall of the inlet section is gradually widened toward the atomizing cavity, and on the cross section passing through the axis of the exhaust pipe, the generatrix of the inlet section intersects with the generatrix of the flow-limiting section and forms a flow-limiting angle.
[0011] In one embodiment, the current limiting angle is not less than 10 degrees and not more than 15 degrees.
[0012] In one embodiment, the bottom end of the flow-limiting section is not lower than the junction of the inlet section and the atomizing chamber;
[0013] And / or, the inner diameter of the smoke exhaust section is the same as the inner diameter of the flow restriction section;
[0014] And / or, the length of the flow-limiting section is no greater than one-third of the total length of the flow-limiting section and the smoke exhaust section.
[0015] In one embodiment, the collecting hood has an installation port communicating with the atomizing chamber, the atomizing module is installed in the installation port, the atomizing module has an atomizing surface facing the exhaust pipe, and the projection of the atomizing surface toward the exhaust pipe falls into the plane where the smoke inlet is located.
[0016] In one embodiment, the collection hood is further provided with a collection chamber and a purification chamber. The purification chamber and the atomizing chamber are respectively connected to the collection chamber. The collection chamber and the purification chamber are located on one side of the atomizing chamber along the lateral direction. The collection chamber is located above the purification chamber. The top of the collection chamber is provided with a collection port for introducing flue gas and condensate. The purification chamber is used to purify the condensate and output it to the atomizing chamber.
[0017] This utility model also proposes a water heater, including a water heater body and a smoke exhaust device as described above. The collection port of the smoke exhaust device faces the water heater body, and the flue gas and condensate generated by the operation of the water heater body flow to the smoke exhaust device through the collection port.
[0018] In one embodiment, the water heater body includes a burner, a combustion chamber housing, and a heat exchanger arranged sequentially from top to bottom. The collection hood of the exhaust device is located below the heat exchanger, and the collection port faces the heat exchanger. The water heater also includes a fan connected to the burner, which drives airflow from top to bottom through the water heater body to the exhaust device.
[0019] The technical solution of this utility model collects flue gas and condensate through a collection hood. The flue gas flows through the atomizing chamber to the exhaust channel and is finally discharged from the exhaust port of the exhaust channel. The condensate is atomized by the atomizing module and can be transported with the flue gas through the exhaust channel to the exhaust port for discharge. Thus, the functions of exhausting flue gas and discharging condensate can be achieved simultaneously. Furthermore, a flow-limiting area is constructed around the inlet of the exhaust pipe at the end away from the exhaust port. In this way, most of the atomized water mist flows through the inlet to the exhaust channel and is finally discharged from the exhaust port of the exhaust channel. The small portion of the atomized water mist is confined within the atomizing chamber by the flow-limiting area, which increases the amount of water mist mixed in the flue gas within the atomizing chamber. This reduces the gas content in the atomizing chamber, lowers the exhaust temperature, and shifts the transmission loss of the exhaust device to lower frequencies. Without sacrificing the exhaust efficiency of the exhaust device, the noise reduction effect of the exhaust device is effectively improved. Attached Figure Description
[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 A schematic diagram of the structure of an embodiment of the water heater provided by this utility model;
[0023] Figure 2 A schematic diagram of an embodiment of the smoke exhaust device provided by this utility model;
[0024] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;
[0025] Figure 4 A comparison chart of the noise reduction frequency changes between the smoke exhaust device provided by this utility model and existing smoke exhaust devices.
[0026] Explanation of icon numbers:
[0027] 100. Smoke exhaust device; 10. Collection hood; 101. Collection chamber; 1011. Collection port; 102. Purification chamber; 103. Atomizing chamber; 104. Installation port; 20. Smoke exhaust pipe; 201. Smoke inlet; 202. Smoke outlet; 203. Smoke exhaust channel; 21. Inlet section; 22. Smoke exhaust section; 23. Flow limiting section; 30. Atomizing module; 301. Atomizing surface; 31. Atomizing component; 32. Base; 40. Flow limiting area; a. Flow limiting angle;
[0028] 200. Water heater body; 210. Burner; 220. Combustion chamber housing; 230. Heat exchanger;
[0029] 300. Fan.
[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Traditional water heater silencers have a relatively uniform internal medium, consisting only of high-temperature flue gas. The medium's properties don't change significantly with the silencer's internal impedance and reactive structure, often requiring a large expansion chamber to reduce low-to-mid-frequency noise. Based on this, and considering the impedance mismatch between water and air media, a small-volume wet exhaust silencer system is proposed to address the issue of requiring a large expansion chamber for low-to-mid-frequency exhaust noise in traditional systems. The wet exhaust silencer system utilizes the property of water vapor directly mixing with flue gas to form a multiphase mixture for noise reduction. It increases the amount of water mist mixed in the flue gas by reducing the proportion of water mist, thereby lowering the exhaust temperature and achieving low-to-mid-frequency noise reduction. The proportion of water mist in the flue gas is called the air content. While a decrease in air content increases the acoustic impedance of the flue gas and water vapor mixture, which can block noise from the flue gas, it also increases flow resistance, hindering flue gas removal. At higher air content, the flue gas and steam cannot form an impedance mismatch, resulting in insignificant low-to-mid-frequency noise reduction performance.
[0033] This utility model proposes a smoke exhaust device 100, which can improve the noise reduction effect of the smoke exhaust device 100 without sacrificing the smoke exhaust efficiency.
[0034] Please refer to Figure 2 and Figure 3In one embodiment of this utility model, the smoke exhaust device 100 includes a collection hood 10, an atomizing module 30, and a smoke exhaust pipe 20. The collection hood 10 is provided with an atomizing chamber 103 for collecting condensate; the atomizing module 30 is disposed on the collection hood 10 and is used to atomize the condensate in the atomizing chamber 103; the smoke exhaust pipe 20 is disposed on the collection hood 10 and is provided with a smoke inlet 201, a smoke outlet 202, and a smoke exhaust channel 203 connecting the smoke inlet 201 and the smoke outlet 202. The smoke inlet 201 is connected to the atomizing chamber 103. One end of the smoke exhaust pipe 20 away from the smoke outlet 202 forms a flow-limiting area 40 around the smoke inlet 201. The flow-limiting area 40 is used to restrict the atomized water mist from entering the smoke exhaust channel 203.
[0035] For ease of understanding, the smoke exhaust device 100 is used as an example in a water heater. Of course, this smoke exhaust device 100 can also be used in other devices that require simultaneous smoke exhaust and drainage. For example... Figure 1 As shown, the water heater may include a water heater body 200 and a flue gas exhaust device 100. The collection port 1011 of the flue gas exhaust device 100 faces the water heater body 200. The flue gas and condensate generated during the operation of the water heater body 200 flow to the flue gas exhaust device 100 through the collection port 1011. Specifically, the water heater body 200 may include a burner 210, a combustion chamber housing 220, and a heat exchanger 230. A flue gas duct connecting the burner 210 and the heat exchanger 230 is formed inside the combustion chamber housing 220. When the water heater is working, driven by the fan 300, the high-temperature flue gas generated by the combustion of the burner 210 is transported to the heat exchanger 230 through the flue gas duct inside the combustion chamber housing 220. The high-temperature flue gas exchanges heat with the heat exchanger 230 to heat the water inside the heat exchanger 230. The flue gas after heat exchange flows to the flue gas exhaust device 100 through the collection port 1011. At the same time, the condensate generated during the operation of the water heater body 200 (for example, condensate will be generated on the surface of the heat exchanger 230 after heat exchange with the flue gas, or condensate will be generated in other parts of the water heater body 200 with lower temperature when in contact with the flue gas) also flows to the exhaust device 100 through the collection port 1011.
[0036] In this embodiment, the collection hood 10 introduces the flue gas and condensate generated during the operation of the water heater body 200 through the collection port 1011. The flue gas can flow through the atomizing chamber 103 to the exhaust channel 203, and finally be discharged from the exhaust port 202 of the exhaust channel 203. The condensate flows through the collection port 1011 to the atomizing chamber 103, where the atomizing module 30 atomizes the condensate in the atomizing chamber 103, so that the atomized condensate can be transported through the exhaust channel 203 to the exhaust port 202 for discharge. The collection hood 10 and the exhaust pipe 20 can be an integrally formed structure, or they can be separate structures assembled separately. For example, the collection hood 10 and the exhaust pipe 20 can be integrally stretched from sheet metal, or they can be integrally injection molded from plastic parts. Of course, the collection hood 10 and the exhaust pipe 20 can also be separate structures, assembled and connected by means of flanges, screws, clips, or other structures. Alternatively, the collection hood 10 and the exhaust pipe 20 can also be fixed by welding. No specific limitation is made here.
[0037] It is important to note that the end of the exhaust pipe 20 furthest from the exhaust port 202 forms a flow-limiting region 40 around the exhaust port 201. The flow-limiting region 40 can take many forms; for example, its cross-section can be rectangular, triangular, or even an irregular shape. No specific restrictions are imposed here. The flow-limiting region 40 is used to restrict the atomized water mist from entering the exhaust channel 203. This can be understood as follows: most of the atomized water mist is directly transported through the atomizing chamber 103 to the smoke inlet 201 of the exhaust channel 203, and finally discharged from the exhaust outlet 202 of the exhaust channel 203. A small portion of the atomized water mist enters the flow-limiting region 40 through the atomizing chamber 103, and is restricted by the flow-limiting region 40, thereby slightly reducing the amount of water mist entering the exhaust channel 203, while increasing the amount of water mist mixed in the flue gas in the atomizing chamber 103, reducing the air content in the atomizing chamber 103, and making the ratio of water mist in the flue gas in the atomizing chamber 103 moderate, neither too high nor too low. This achieves greater mid-to-low frequency noise reduction while lowering the exhaust temperature. Figure 4 As shown, Figure 4 This is a comparison diagram of the noise reduction frequency changes of the smoke exhaust device 100 provided by this utility model and the smoke exhaust device 100 of the prior art. As can be seen from the figure, compared with the prior art, the noise frequency of the smoke exhaust device 100 of this utility model changes more gradually with time, thus achieving a better noise reduction effect.
[0038] In other words, this solution improves the noise reduction effect of the smoke exhaust device 100 without sacrificing exhaust efficiency by mixing an appropriate amount of uniform water mist into the flue gas. Compared to a single flue gas medium, the mixture of water mist (water vapor) and flue gas alters the propagation process of sound waves, and noise dissipates in the mixture, achieving mid-to-low frequency noise reduction. Furthermore, since the water mist also absorbs a small amount of harmful substances emitted into the atmosphere, it can improve the emission performance of the smoke exhaust device 100.
[0039] The technical solution of this utility model collects flue gas and condensate through the collection hood 10. The flue gas can flow through the atomizing chamber 103 to the exhaust channel 203 and finally be discharged from the exhaust port 202 of the exhaust channel 203. After the condensate is atomized by the atomization module 30, it can be transported with the flue gas through the exhaust channel 203 to the exhaust port 202 for discharge. In this way, the functions of exhausting smoke and condensate can be realized simultaneously. Furthermore, the end of the exhaust pipe 20 away from the exhaust port 202 forms a flow-limiting area 40 around the smoke inlet 201. Thus, most of the atomized water mist flows through the smoke inlet 201 to the exhaust channel 203 and is finally discharged from the exhaust port 202 of the exhaust channel 203. The small portion of the atomized water mist is restricted by the flow-limiting area 40 within the atomization chamber 103, which increases the amount of water mist mixed in the flue gas within the atomization chamber 103. This reduces the gas content in the atomization chamber 103, lowers the exhaust temperature, and shifts the transmission loss of the exhaust device 100 to lower frequencies. Without sacrificing the exhaust efficiency of the exhaust device 100, the noise reduction effect of the exhaust device 100 is effectively improved.
[0040] It is understandable that there are many ways to implement the exhaust pipe 20, such as... Figure 2 As shown, in one embodiment, the exhaust pipe 20 includes an inlet section 21, an exhaust section 22 and a flow-limiting section 23 communicating with the inlet section 21. The inlet section 21 is located at the top of the collection hood 10 and communicates with the atomizing chamber 103. The exhaust section 22 extends upward from the top of the inlet section 21 and has an exhaust port 202 at its top. The flow-limiting section 23 extends downward from the bottom of the exhaust section 22 and has an inlet port 201 at its bottom. The flow-limiting section 23 extends into the inlet section 21, and a flow-limiting region 40 is formed between the outer peripheral surface of the flow-limiting section 23 and the inner peripheral surface of the inlet section 21.
[0041] In this embodiment, the inlet section 21 can be a vertically extending straight cylinder or a funnel shape that gradually expands towards the atomizing chamber 103; the specific shape is not limited here. The top end of the inlet section 21 is connected to the bottom end of the exhaust section 22, and the bottom end of the inlet section 21 is connected to the collection hood 10. The top end of the flow-limiting section 23 is connected to the bottom end of the exhaust section 22, and the bottom end of the flow-limiting section 23 is positioned towards the atomizing chamber 103. The flow-limiting section 23 extends into the inlet section 21, so that the outer peripheral surface of the flow-limiting section 23 and the inner peripheral surface of the inlet section 21 form a flow-limiting region 40 that communicates with the atomizing chamber 103. The flow-limiting region 40 formed by the flow-limiting section 23 and the inlet section 21 helps to increase the space of the atomizing chamber 103 and improve the noise reduction effect of the exhaust device 100.
[0042] In one embodiment, the inlet section 21 is flared towards the atomizing chamber 103. This flaring can be a gradually expanding trumpet-shaped flare or a sudden, stepped flare. This arrangement ensures that the flow-limiting region 40 is flared towards the atomizing chamber 103, allowing the atomized water mist to quickly enter and remain within the flow-limiting region 40, thus improving the noise reduction effect and duration of the smoke exhaust device 100.
[0043] Furthermore, such as Figure 2 and Figure 3 As shown, the peripheral wall of the inlet section 21 gradually expands towards the atomizing chamber 103. On the cross-section passing through the axis of the exhaust pipe 20, the generatrix of the inlet section 21 intersects with the generatrix of the flow-limiting section 23 and forms a flow-limiting angle α. The flow-limiting angle α is an acute angle. In this way, some of the atomized water mist can enter the angle region more quickly from the opening of the angle and be confined within the angle region to mix with the smoke in the atomizing chamber 103, thereby improving the noise reduction effect.
[0044] like Figure 3 As shown, in one embodiment, the flow-limiting angle α is not less than 10 degrees and not greater than 15 degrees. Within this range, water mist entering the angle region can be prevented from overflowing, ensuring the noise reduction effect.
[0045] like Figure 2 As shown, in one embodiment, the bottom end of the flow-limiting section 23 is not lower than the junction of the inlet section 21 and the atomizing chamber 103. In this way, the flow-limiting section 23 can be prevented from contacting the water condensation in the atomizing chamber 103, while ensuring that the flow-limiting area 40 restricts the atomized water mist, not the condensed water, thereby ensuring the noise reduction effect.
[0046] like Figure 2As shown, in one embodiment, the inner diameter of the exhaust section 22 is the same as the inner diameter of the flow restriction section 23. This ensures that the flow velocity of the flue gas in the exhaust pipe 20 is always consistent, and at the same time ensures that the flow velocity of the atomized water mist in the exhaust pipe 20 is always consistent, avoiding inconsistent flow velocities that would cause excessive noise in the exhaust pipe 20.
[0047] like Figure 2 As shown, in one embodiment, the length of the flow-limiting section 23 is no greater than one-third of the total length of the flow-limiting section 23 and the smoke exhaust section 22.
[0048] Understandably, when the length of the flow-limiting section 23 is too long, for example, when the extension length is two-thirds of the total length of the flow-limiting section 23 and the exhaust pipe 20, the flow-limiting area 40 formed between the flow-limiting section 23 and the inlet section 21 is too large. This flow-limiting area 40 mixes excessive water mist into the smoke in the atomizing chamber 103, easily leading to a low air content in the atomizing chamber 103, which is detrimental to smoke removal. Conversely, when the length of the flow-limiting section 23 is too short, for example, when the extension length is one-tenth of the total length of the flow-limiting section 23 and the exhaust pipe 20, the flow-limiting area 40 formed between the flow-limiting section 23 and the inlet section 21 is too small. This flow-limiting area 40 mixes too little water mist into the smoke in the atomizing chamber 103, easily leading to a high air content in the atomizing chamber 103, and the mid-to-low frequency noise reduction effect is not significant.
[0049] To address this, this embodiment limits the length of the flow-limiting section 23 to be less than or equal to one-third of the total length of the flow-limiting section 23 and the smoke exhaust section 22. For example, the lengths of the flow-limiting section 23 and the smoke exhaust section 22 are 1m, and the length of the flow-limiting section 23 is 30cm. This ensures that the flue gas from the flow-limiting area 40 is mixed with an appropriate amount of uniform water mist into the atomizing chamber 103, thereby improving the noise reduction effect of the smoke exhaust device 100 without sacrificing the smoke exhaust efficiency.
[0050] It is understandable that there are many ways to install the atomizing module 30, such as... Figure 2 As shown, in one embodiment, the collection cover 10 is provided with an installation port 104 communicating with the atomizing chamber 103, the atomizing module 30 is installed in the installation port 104, the atomizing module 30 has an atomizing surface 301 facing the exhaust pipe 20, and the projection of the atomizing surface 301 toward the exhaust pipe 20 falls into the plane where the smoke inlet 201 is located.
[0051] In this embodiment, the atomizing module 30 includes a base 32 and an atomizing element 31 mounted on the base 32. The base 32 is fixed to the mounting port 104. The portion of the base 32 with the atomizing element 31 extends into the atomizing chamber 103 through the mounting port 104, thereby effectively atomizing the condensate in the atomizing chamber 103. The base 32 is sealed to the periphery of the mounting port 104, thus preventing condensate in the atomizing chamber 103 from leaking out through the gap between the base 32 and the periphery of the mounting port 104. For example, a sealant or sealing ring can be provided between the base 32 and the periphery of the mounting port 104 to achieve a sealed connection. The atomizing component 31 has an atomizing surface 301 facing the exhaust pipe 20. The projection of the atomizing surface 301 toward the exhaust pipe 20 falls into the plane where the smoke inlet 201 is located, so that most of the water mist after atomization by the atomizing component 31 can enter the exhaust channel 203 through the smoke inlet 201 and be discharged outward, thereby improving the atomization effect.
[0052] Understandably, although the atomizing module 30 can atomize the condensed water and discharge it with the flue gas, there are usually a lot of impurities in the condensed water, which can easily affect the atomization effect and the service life of the atomizing module 30.
[0053] like Figure 2 As shown, in one embodiment, the collection hood 10 further includes a collection chamber 101 and a purification chamber 102. The purification chamber 102 and the atomizing chamber 103 are respectively connected to the collection chamber 101. The collection chamber 101 and the purification chamber 102 are located on one side of the atomizing chamber 103 along the lateral direction. The collection chamber 101 is located above the purification chamber 102. The top of the collection chamber 101 is provided with a collection port 1011 for introducing flue gas and condensate. The purification chamber 102 is used to purify the condensate and output it to the atomizing chamber 103. Thus, the collection hood 10 introduces the flue gas and condensate generated during the operation of the water heater body 200 through the collection port 1011. The flue gas can flow through the collection chamber 101 and the atomizing chamber 103 to the exhaust channel 203, and finally be discharged from the exhaust port 202 of the exhaust channel 203. Condensate flows from the collection chamber 101 to the purification chamber 102, where it is purified before being output to the atomization chamber 103. The atomization module 30 then atomizes the condensate in the atomization chamber 103, allowing it to be discharged through the exhaust duct 203 to the exhaust port 202. In other words, the condensate is purified in the purification chamber 102 before entering the atomization chamber 103 for atomization. This prevents impurities in the condensate from affecting the atomization module 30, improving the atomization effect and extending the service life of the atomization module 30.
[0054] like Figure 1As shown, this utility model also proposes a water heater, which includes a water heater body 200 and a flue gas exhaust device 100. The collection port 1011 of the flue gas exhaust device 100 faces the water heater body 200, and the flue gas and condensate generated by the operation of the water heater body 200 flow to the flue gas exhaust device 100 through the collection port 1011. The specific structure of the flue gas exhaust device 100 is as described in the above embodiments. Since this water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Specifically, this water heater relates to a gas water heater, which can be a forced draft gas water heater or a forced blast gas water heater.
[0055] like Figure 1 As shown, in one embodiment, the water heater body 200 includes a burner 210, a combustion chamber housing 220, and a heat exchanger 230 arranged sequentially from top to bottom. The collection hood 10 of the exhaust device 100 is located below the heat exchanger 230, and the collection port 1011 faces the heat exchanger 230. The water heater also includes a fan 300 communicating with the burner 210. The fan 300 is used to drive airflow from top to bottom through the water heater body 200 to the exhaust device 100.
[0056] In this embodiment, the water heater is specifically a forced-draft gas water heater with inverted combustion. The water heater includes a casing, and components such as a water heater body 200, a fan 300, and a gas proportional valve disposed within the casing. The water heater body 200 includes, from top to bottom, a burner 210, a combustion chamber housing 220, and a heat exchanger 230. The fan 300 and the gas proportional valve are located at the top of the burner 210 and communicate with it. The gas proportional valve controls the amount of gas supplied to the burner 210. The fan 300 supplies secondary air to the burner 210 and simultaneously drives the airflow along the water heater body 200 from top to bottom to the exhaust device 100. The collection hood 10 of the exhaust device 100 is located below the heat exchanger 230. The collection port 1011 of the collection hood 10 faces the heat exchanger 230. The exhaust pipe 20 is arranged horizontally (e.g., left and right) on one side of the water heater body 200. The exhaust pipe 20 extends upward from the top of the collection hood 10. The exhaust pipe 20 has an exhaust port 202, one end of which extends out of the shell.
[0057] When the water heater is running, driven by the fan 300, the high-temperature flue gas generated by the combustion of the burner 210 flows downward along the flue inside the combustion chamber housing 220 to the heat exchanger 230. The high-temperature flue gas exchanges heat with the heat exchanger 230 to heat the water flow inside the heat exchanger 230. After heat exchange, the flue gas flows further downward to the collection chamber 101 located below the heat exchanger 230, and is finally discharged from the exhaust port 202 of the exhaust passage 203. After heat exchange, condensate will form on the surface of heat exchanger 230. Under the action of gravity, the condensate drips from collection port 1011 into collection chamber 101. The condensate then flows from collection port 1011 into collection chamber 101, where it is atomized by atomizing module 30. This atomized condensate is then carried by the flue gas through exhaust channel 203 to exhaust port 202 for discharge. Thus, both flue gas exhaust and condensate discharge functions can be achieved simultaneously. Furthermore, the end of exhaust pipe 20 away from exhaust port 202 forms a flow restriction zone around the flue gas inlet 201. In zone 40, most of the atomized water mist flows through the flue gas inlet 201 to the exhaust channel 203, and finally exits from the exhaust port 202 of the exhaust channel 203. A small portion of the atomized water mist is confined within the atomization chamber 103 by the flow-limiting zone 40, increasing the amount of water mist mixed in the flue gas within the atomization chamber 103. This reduces the gas content within the atomization chamber 103, lowers the exhaust temperature, and shifts the transmission loss of the exhaust device 100 to lower frequencies. Without sacrificing the exhaust efficiency of the exhaust device 100, this effectively improves the noise reduction effect of the exhaust device 100. Furthermore, driven by the fan 300, the flue gas flows downwards, and the flow direction is consistent with the dripping direction of the condensate on the surface of the heat exchanger 230. The blowing of the flue gas accelerates the dripping of the condensate, preventing a large amount of condensate from adhering to the surface of the heat exchanger 230 and forming a water film that affects heat exchange efficiency. This improves the heat exchange efficiency of the water heater.
[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A smoke extraction device, characterized in that, include: The collection hood is equipped with an atomizing chamber for collecting condensate. An atomizing module is provided on the collection hood, and the atomizing module is used to atomize the condensate in the atomizing chamber; as well as A smoke exhaust pipe is provided at the collection hood. The smoke exhaust pipe has a smoke inlet, a smoke outlet, and a smoke exhaust channel connecting the smoke inlet and the smoke outlet. The smoke inlet is connected to the atomizing chamber. The end of the smoke exhaust pipe away from the smoke outlet forms a flow restriction area around the smoke inlet. The flow restriction area is used to restrict the atomized water mist from entering the smoke exhaust channel.
2. The smoke extraction device as described in claim 1, characterized in that, The exhaust pipe includes an inlet section, an exhaust section and a flow-limiting section connected to the inlet section. The inlet section is located at the top of the collection hood and is connected to the atomizing chamber. The exhaust section extends upward from the top of the inlet section and has an exhaust port at its top. The flow-limiting section extends downward from the bottom of the exhaust section and has an inlet at its bottom. The flow-limiting section extends into the inlet section, and the flow-limiting area is formed between the outer peripheral surface of the flow-limiting section and the inner peripheral surface of the inlet section.
3. The smoke extraction device as described in claim 2, characterized in that, The inlet section is flared outwards toward the atomizing chamber.
4. The smoke extraction device as described in claim 2, characterized in that, The peripheral wall of the inlet section gradually expands toward the atomizing chamber. On the cross-section passing through the axis of the exhaust pipe, the generatrix of the inlet section intersects with the generatrix of the flow-limiting section and forms a flow-limiting angle.
5. The smoke extraction device as described in claim 4, characterized in that, The current limiting angle is not less than 10 degrees and not more than 15 degrees.
6. The smoke extraction device as described in claim 2, characterized in that, The bottom of the flow-limiting section is not lower than the junction of the inlet section and the atomizing chamber; And / or, the inner diameter of the smoke exhaust section is the same as the inner diameter of the flow restriction section; And / or, the length of the flow-limiting section is no greater than one-third of the total length of the flow-limiting section and the smoke exhaust section.
7. The smoke extraction device as described in claim 1, characterized in that, The collection hood is provided with an installation port communicating with the atomizing chamber. The atomizing module is installed in the installation port. The atomizing module has an atomizing surface facing the exhaust pipe. The projection of the atomizing surface toward the exhaust pipe falls into the plane where the smoke inlet is located.
8. The smoke extraction device as described in any one of claims 1 to 7, characterized in that, The collection hood is also provided with a collection chamber and a purification chamber. The purification chamber and the atomizing chamber are respectively connected to the collection chamber. The collection chamber and the purification chamber are located on one side of the atomizing chamber along the lateral direction. The collection chamber is located above the purification chamber. The top of the collection chamber is provided with a collection port for introducing flue gas and condensate. The purification chamber is used to purify the condensate and output it to the atomizing chamber.
9. A water heater, characterized in that, The device includes a water heater body and a smoke exhaust device as described in any one of claims 1 to 8, wherein the collection port of the smoke exhaust device faces the water heater body, and the flue gas and condensate generated by the operation of the water heater body flow to the smoke exhaust device through the collection port.
10. The water heater as described in claim 9, characterized in that, The water heater body includes a burner, a combustion chamber housing, and a heat exchanger arranged sequentially from top to bottom. The collection hood of the exhaust device is located below the heat exchanger, and the collection port faces the heat exchanger. The water heater also includes a fan connected to the burner. The fan is used to drive airflow from top to bottom through the water heater body to the exhaust device.