Exhaust hood of gas water heater and gas water heater
By setting a primary flow guide structure and a secondary flow guide structure on the exhaust hood of the gas water heater, the flow path of the flue gas is optimized, which solves the problem of high resistance in flue gas discharge and achieves the effects of energy saving, noise reduction and extended fan life.
Patent Information
- Application Number
- CN202520354645.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Existing gas water heaters suffer from high resistance to flue gas discharge due to the sudden change in the area between the exhaust components and the combustion chamber of the burner during the flue gas emission process, which increases energy consumption and noise, and shortens the lifespan of the fan.
The flue gas flow path is optimized by adopting a primary flow guide structure and a secondary flow guide structure to reduce flue gas discharge resistance, and the fan speed and noise are reduced by a smooth transition design.
It effectively reduces flue gas exhaust resistance, lowers energy consumption and noise, extends fan life, and improves exhaust efficiency and safety.
Smart Images
Figure CN223939650U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas water heater technology, and in particular to the exhaust hood of a gas water heater and a gas water heater. Background Technology
[0002] Currently, gas water heaters, as a crucial device for household hot water supply, face a series of challenges in terms of flue gas emissions. A significant technical difficulty lies in the abrupt change in area between the exhaust pipe and the combustion chamber of the burner. This structural abrupt change causes significant resistance to the exhaust gas, affecting its smooth discharge. To address this resistance issue, existing gas water heaters typically increase the fan speed to enhance flue gas exhaust capacity. While this method ensures smooth exhaust to some extent, the resulting problems cannot be ignored. Increasing fan speed not only significantly increases energy consumption, leading to higher electricity bills, but also increases noise, impacting the user experience. More importantly, prolonged high-speed operation accelerates fan wear, shortening its lifespan and increasing maintenance costs and replacement frequency. Utility Model Content
[0003] This application aims to solve at least one of the technical problems existing in the related art. To this end, this application proposes a flue hood for a gas water heater, which reduces the resistance to flue gas discharge and improves the flue gas discharge efficiency through a primary flow guiding structure and a secondary flow guiding structure, while reducing energy consumption and noise.
[0004] This application also proposes a gas water heater.
[0005] A gas water heater exhaust hood according to the first aspect of this application includes:
[0006] The smoke exhaust component is provided with a smoke exhaust channel and a smoke exhaust outlet, wherein the smoke exhaust channel is connected to the smoke exhaust outlet;
[0007] A smoke collection component is connected to the smoke exhaust component. The smoke collection component has a smoke collection chamber inside. The smoke collection chamber has a primary flow guiding structure on the side near the smoke exhaust port. The opening area of the primary flow guiding structure gradually decreases along the direction towards the smoke exhaust port. The smoke exhaust channel connects to the smoke collection chamber. The opening area of the smoke collection chamber is larger than the opening area of the smoke exhaust channel. A secondary flow guiding structure is provided at the connection between the smoke collection chamber and the smoke exhaust channel. The opening area of the secondary flow guiding structure gradually decreases along the direction towards the smoke exhaust port.
[0008] According to the embodiments of this application, the exhaust hood of the gas water heater effectively reduces the resistance of flue gas during the exhaust process through the optimized design of the primary and secondary flow guiding structures, thereby improving the exhaust efficiency. Due to the reduction in flue gas exhaust resistance, the fan can smoothly exhaust the flue gas without increasing its speed, thereby reducing energy consumption and noise.
[0009] According to one embodiment of this application, the primary flow guiding structure is one of a chamfered structure and a rounded corner structure, used to guide the flue gas to smoothly transition from the smoke collection chamber to the smoke exhaust channel;
[0010] And / or,
[0011] The secondary flow guiding structure is one of a chamfered structure and a rounded corner structure, used to reduce the flow resistance of flue gas at the connection between the smoke collection chamber and the smoke exhaust channel.
[0012] According to one embodiment of this application, when the primary flow guiding structure is a chamfered structure, the inclination angle of the chamfered structure relative to the horizontal plane is 30°-60°;
[0013] And / or, if the secondary flow guide structure is a chamfered structure, the angle of inclination of the chamfered structure relative to the horizontal plane is 45°-75°.
[0014] According to one embodiment of this application, when the primary flow guide structure is a rounded corner structure, the radius of curvature of the rounded corner structure is 5mm-15mm;
[0015] And / or,
[0016] When the secondary flow guide structure is a rounded corner structure, the radius of curvature of the rounded corner structure is 5mm-15mm.
[0017] According to one embodiment of this application, the smoke exhaust component includes a first smoke exhaust section and a second smoke exhaust section. The first smoke exhaust section is connected to the smoke collection component, and the second smoke exhaust section is connected to the first smoke exhaust section. The smoke exhaust port is disposed in the second smoke exhaust section. The first smoke exhaust section and the second smoke exhaust section form the smoke exhaust channel. The opening area of the first smoke exhaust section is larger than the opening area of the second smoke exhaust section.
[0018] According to one embodiment of this application, a three-stage flow guiding structure is provided at the connection between the first smoke exhaust section and the second smoke exhaust section, wherein the opening area of the three-stage flow guiding structure gradually decreases along the direction toward the smoke exhaust port.
[0019] According to one embodiment of this application, the three-stage flow guiding structure is one of a chamfered structure and a rounded corner structure.
[0020] According to one embodiment of this application, the smoke exhaust component includes a first smoke exhaust section and a second smoke exhaust section. The first smoke exhaust section is connected to the smoke collection component, and the second smoke exhaust section is connected to the first smoke exhaust section. The smoke exhaust port is disposed in the second smoke exhaust section. The first smoke exhaust section and the second smoke exhaust section form the smoke exhaust channel. The opening area of the first smoke exhaust section gradually decreases in the direction towards the smoke exhaust port, or the opening area of the second smoke exhaust section gradually decreases in the direction towards the smoke exhaust port.
[0021] According to one embodiment of this application, the smoke collection component and the smoke exhaust component are integrally formed.
[0022] A gas water heater according to a second aspect embodiment of this application includes:
[0023] The burner has an internal combustion chamber;
[0024] The aforementioned smoke hood is connected to the burner, and the smoke collection chamber is connected to the combustion chamber;
[0025] A heat exchanger is located in the combustion chamber;
[0026] A cold water inlet pipe is connected to the inlet of the heat exchanger;
[0027] A hot water outlet pipe is connected to the outlet of the heat exchanger.
[0028] According to the embodiments of this application, the gas water heater improves the overall performance of the gas water heater by optimizing the structural design of the exhaust hood.
[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a schematic diagram of the structure of the exhaust hood of a gas water heater provided in one embodiment of this application.
[0032] Figure 2 This is a schematic diagram of the structure of the exhaust hood of a gas water heater provided in one embodiment of this application.
[0033] Figure 3This is a schematic diagram of the structure of the exhaust hood of a gas water heater provided in one embodiment of this application.
[0034] Figure 4 This is a schematic diagram of the structure of the exhaust hood of a gas water heater provided in one embodiment of this application.
[0035] Figure 5 This is a schematic diagram of the structure of a gas water heater provided in an embodiment of this application.
[0036] Figure label:
[0037] 10. Smoke hood;
[0038] 20. Burner; 30. Heat exchanger; 40. Cold water inlet pipe; 50. Hot water outlet pipe;
[0039] 100. Smoke exhaust component; 101. Smoke exhaust duct; 102. Smoke exhaust outlet; 110. First smoke exhaust section; 120. Second smoke exhaust section; 130. Three-stage flow guide structure;
[0040] 200. Smoke collection component; 201. Smoke collection chamber; 210. Primary flow guiding structure; 220. Secondary flow guiding structure. Detailed Implementation
[0041] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.
[0042] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0043] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections, wherein a fixed connection can include an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0044] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0046] Currently, in the design of gas water heater exhaust hoods, the diameter of the exhaust port is usually consistent, requiring the exhaust gas to suddenly turn 90 degrees upon exiting. This design causes a sharp change in the direction of gas flow, increasing local resistance and thus affecting exhaust efficiency. The sudden change in fluid flow direction at the 90-degree turn generates significant local resistance. Due to this increased resistance, the fan needs to operate at a higher speed to overcome it and expel the exhaust gas smoothly. This not only increases the fan's energy consumption but may also shorten its lifespan. Furthermore, the increased fan speed also leads to increased operating noise, affecting the user experience. In addition, high resistance can cause poor exhaust and even the risk of backflow, impacting the safety and performance of the water heater.
[0047] To address the issue of high exhaust resistance in gas water heaters, this application proposes a novel exhaust hood and gas water heater. This design optimizes the flue gas flow path by incorporating a primary flow guide structure 210 and a secondary flow guide structure 220 on the exhaust hood 10. This ensures that the exhaust gas is no longer abruptly turned 90°, but rather discharged in a smoother and more efficient manner, significantly reducing exhaust resistance. This allows the fan to achieve the same exhaust volume at a lower speed, thereby achieving energy savings, extending equipment lifespan, reducing noise, and improving safety.
[0048] The following is combined Figures 1 to 5This application describes the exhaust hood and the gas water heater.
[0049] According to the first aspect of this application, a gas water heater exhaust hood 10 is provided. Please refer to... Figure 1 The system includes: a smoke exhaust component 100 and a smoke collection component 200. The smoke exhaust component 100 is provided with a smoke exhaust channel 101 and a smoke exhaust port 102, and the smoke exhaust channel 101 is connected to the smoke exhaust port 102. The smoke collection component 200 is connected to the smoke exhaust component 100. The smoke collection component 200 is provided with a smoke collection chamber 201 inside. The smoke collection chamber 201 is provided with a primary flow guiding structure 210 on the side near the smoke exhaust port 102. The opening area of the primary flow guiding structure 210 gradually decreases along the direction towards the smoke exhaust port. The primary flow guiding structure 210 is used to guide the flow of smoke. The smoke exhaust channel 101 is connected to the smoke collection chamber 201. The opening area of the smoke collection chamber 201 is larger than the opening area of the smoke exhaust channel 101. A secondary flow guiding structure 220 is provided at the connection between the smoke collection chamber 201 and the smoke exhaust channel 101. The opening area of the secondary flow guiding structure 220 gradually decreases along the direction towards the smoke exhaust port. The secondary flow guiding structure 220 is used to reduce the resistance to the flow of smoke.
[0050] According to the embodiments of this application, the exhaust hood 10 of the gas water heater effectively reduces the resistance of flue gas during the exhaust process and improves the exhaust efficiency through the optimized design of the primary flow guiding structure 210 and the secondary flow guiding structure 220. Due to the reduction of the exhaust resistance, the fan can smoothly exhaust the flue gas without increasing its speed, thereby reducing energy consumption and noise.
[0051] Understandably, the smoke collection component 200 has a smoke collection chamber 201 inside, which is used to collect the flue gas generated from the burner 20. The smoke collection chamber 201 has a primary flow guiding structure 210 on the side near the exhaust port 102, which effectively guides the flow direction of the flue gas in the smoke collection chamber 201, reduces eddies and turbulence, and thus improves the smoothness of the flue gas flow.
[0052] The exhaust component 100 is provided with an exhaust channel 101 and an exhaust port 102. The exhaust channel 101 is connected to the exhaust port 102 and is used to exhaust flue gas from inside the water heater to the external environment. A secondary flow guiding structure 220 is provided at the connection between the smoke collection chamber 201 and the exhaust channel 101. The secondary flow guiding structure 220 is used to further guide the flow of flue gas and reduce the resistance and turbulence generated by the flue gas at the bend.
[0053] The primary flow guide structure 210 and the secondary flow guide structure 220 ensure that the flue gas can smoothly transition when it leaves the smoke collection component 200 and the smoke exhaust component 100 to the outside, thus minimizing the resistance of the smoke exhaust path.
[0054] In one embodiment, the flue gas flow does not involve any 90-degree right-angle turns.
[0055] According to one embodiment of this application, the primary flow guiding structure 210 is one of a chamfered structure and a rounded corner structure, used to guide the flue gas from the smoke collection chamber 201 to the smoke exhaust channel 101 smoothly.
[0056] It is understandable that the primary flow guiding structure 210 is either a chamfered structure or a rounded corner structure. Both of these structures can effectively guide the flue gas to smoothly transition from the smoke collection chamber 201 to the smoke exhaust channel 101, reducing eddies and turbulence.
[0057] By setting a chamfered structure on the side of the smoke collection chamber 201 near the smoke outlet 102, the smoke can gradually change direction during the flow process, avoiding the resistance caused by sudden turns.
[0058] By setting a rounded corner structure on the side of the smoke collection chamber 201 near the smoke exhaust port 102, the rounded corner mechanism further reduces the resistance of the flue gas during the flow process and improves the smoke exhaust efficiency through a smoother curve transition.
[0059] According to one embodiment of this application, the secondary flow guiding structure 220 is one of a chamfered structure and a rounded corner structure, used to reduce the flow resistance of flue gas at the connection between the smoke collection chamber 201 and the smoke exhaust channel 101.
[0060] It is understandable that the secondary flow guiding structure 220 is either a chamfered structure or a rounded corner structure. Both of these structures can effectively reduce the flow resistance of flue gas at the connection between the smoke collection chamber 201 and the smoke exhaust channel 101.
[0061] By setting a chamfered structure at the connection between the smoke collection chamber 201 and the smoke exhaust channel 101, the flue gas can transition more smoothly when turning, reducing the eddies and resistance caused by right-angle turns.
[0062] By setting a rounded corner structure on the side of the smoke collection chamber 201 near the smoke exhaust port 102, the rounded corner mechanism further reduces the resistance of the flue gas during the flow process and improves the smoke exhaust efficiency through a smoother curve transition.
[0063] According to one embodiment of this application, when the primary flow guiding structure 210 is a chamfered structure, the inclination angle of the chamfered structure relative to the horizontal plane is 30°-60°. It should be noted that the inclination angle of the chamfered structure of the primary flow guiding structure 210 can be 30°, 40°, 45°, 50°, or 60°.
[0064] In one embodiment, please refer to Figure 2 The chamfered structure of the primary flow guide structure 210 has an inclination angle of 30°.
[0065] According to one embodiment of this application, when the secondary flow guiding structure 220 is a chamfered structure, the inclination angle of the chamfered structure relative to the horizontal plane is 45°-75°. It should be noted that the inclination angle of the chamfered structure of the secondary flow guiding structure 220 can be 45°, 50°, 60°, 65°, 70°, or 75°.
[0066] In one embodiment, please refer to Figure 2 The chamfered structure of the secondary flow guide structure 220 has an inclination angle of 45°.
[0067] According to one embodiment of this application, when the primary flow guide structure is a rounded corner structure, the radius of curvature of the rounded corner structure is 5mm-15mm.
[0068] According to one embodiment of this application, when the secondary flow guide structure 220 is a rounded corner structure, the radius of curvature of the rounded corner structure is 5mm-15mm.
[0069] In one embodiment, please refer to Figure 4 The radius of curvature of the rounded corner structure of the secondary flow guide structure 220 is 5mm.
[0070] In one embodiment, please refer to Figure 1 The radius of curvature of the rounded corner structure of the secondary flow guide structure 220 is 15mm.
[0071] According to one embodiment of this application, please refer to Figure 3 The smoke exhaust component 100 includes a first smoke exhaust section 110 and a second smoke exhaust section 120. The first smoke exhaust section 110 is connected to the smoke collection component 200, and the second smoke exhaust section 120 is connected to the first smoke exhaust section 110. A smoke exhaust port 102 is provided in the second smoke exhaust section 120. The first smoke exhaust section 110 and the second smoke exhaust section 120 form a smoke exhaust channel 101. The opening area of the first smoke exhaust section 110 is larger than the opening area of the second smoke exhaust section 120.
[0072] Understandably, the smoke exhaust component 100 consists of a first smoke exhaust section 110 and a second smoke exhaust section 120, which together form the smoke exhaust channel 101. The first smoke exhaust section 110 is directly connected to the smoke collection component 200, serving as a transition and buffer. Its opening area is designed to be larger than that of the second smoke exhaust section 120. This design helps to slow down the velocity change of the smoke as it enters the smoke exhaust channel 101 from the smoke collection chamber 201, reducing flow resistance.
[0073] The smoke exhaust component 100, with its hierarchical design, optimizes the smoke flow path, reduces flow resistance, and improves exhaust efficiency. Simultaneously, this design enhances the structural stability of the smoke exhaust hood 10, making it more stable and reliable when subjected to smoke impact and vibration.
[0074] It should be noted that the secondary flow guiding structure 220 is located at the connection between the first smoke exhaust section 110 and the smoke collection component 200.
[0075] According to one embodiment of this application, a three-stage flow guiding structure 130 is provided at the connection between the first smoke exhaust section 110 and the second smoke exhaust section 120. The opening area of the three-stage flow guiding structure 130 gradually decreases along the direction toward the smoke exhaust port. The three-stage flow guiding structure 130 is used to reduce the resistance to the flow of flue gas.
[0076] When flue gas flows from the first exhaust section 110 with a larger opening area into the second exhaust section 120 with a smaller opening area, the three-stage flow guiding structure 130 can effectively guide the flue gas to make a smooth turn and accelerate, avoiding eddies and turbulence caused by area changes, thereby significantly reducing flow resistance.
[0077] According to one embodiment of this application, the three-stage flow guiding structure 130 is one of a chamfered structure and a rounded corner structure.
[0078] It is understandable that the three-stage flow guiding structure 130 is either a chamfered structure or a rounded corner structure. Both of these structures can effectively guide the flue gas to smoothly transition from the first exhaust section 110 to the second exhaust section 120, reducing eddies and turbulence.
[0079] By setting a chamfered structure at the connection between the first smoke exhaust section 110 and the second smoke exhaust section 120, the flue gas can gradually change direction during its flow, avoiding resistance caused by sudden turns.
[0080] By setting a rounded corner structure on the side of the smoke collection chamber 201 near the smoke exhaust port 102, the rounded corner mechanism further reduces the resistance of the flue gas during the flow process and improves the smoke exhaust efficiency through a smoother curve transition.
[0081] According to one embodiment of this application, when the three-stage flow guiding structure 130 is a chamfered structure, the inclination angle of the chamfered structure relative to the horizontal plane is 30°-60°. It should be noted that the inclination angle of the chamfered structure of the three-stage flow guiding structure 130 can be 30°, 40°, 45°, 50°, or 60°.
[0082] According to one embodiment of this application, when the three-stage flow guide structure 130 is a rounded corner structure, the radius of curvature of the rounded corner structure is 2mm-10mm.
[0083] In one embodiment, please refer to Figure 4 The radius of curvature of the three-stage flow guide structure with 130 rounded corners is 3mm.
[0084] According to one embodiment of this application, the opening area of the first smoke exhaust section 110 is 20%-50% larger than the opening area of the second smoke exhaust section 120.
[0085] In one embodiment, please refer to Figure 3 The opening diameter of the first smoke exhaust section 110 is 80mm, and the opening diameter of the second smoke exhaust section 120 is 60mm.
[0086] According to one embodiment of this application, the smoke exhaust component 100 includes a first smoke exhaust section 110 and a second smoke exhaust section 120. The first smoke exhaust section 110 is connected to the smoke collection component 200, and the second smoke exhaust section 120 is connected to the first smoke exhaust section 110. A smoke exhaust port 102 is provided in the second smoke exhaust section 120. The first smoke exhaust section 110 and the second smoke exhaust section 120 form a smoke exhaust channel 101. The opening area of the first smoke exhaust section 110 gradually decreases in the direction towards the smoke exhaust port 102, or the opening area of the second smoke exhaust section 120 gradually decreases in the direction towards the smoke exhaust port 102.
[0087] According to one embodiment of this application, the first exhaust section 110 is either trumpet-shaped or cylindrical.
[0088] According to one embodiment of this application, the second exhaust section 120 is either trumpet-shaped or cylindrical.
[0089] According to one embodiment of this application, the smoke collecting component 200 and the smoke exhaust component 100 are integrally formed. It is understood that the integral forming of the smoke collecting component 200 and the smoke exhaust component 100 reduces the connection points and gaps between components, thereby reducing the risk of smoke leakage and enhancing the product's sealing and safety. At the same time, the integral forming design also reduces assembly steps, simplifies the manufacturing process, and improves production efficiency.
[0090] According to a gas water heater based on a second aspect embodiment of this application, please refer to... Figure 5 Gas water heaters include:
[0091] Burner 20, with a combustion chamber inside;
[0092] The aforementioned smoke hood 10 is connected to the burner 20, and the smoke collection chamber 201 is connected to the combustion chamber;
[0093] Heat exchanger 30 is located in the combustion chamber;
[0094] The cold water inlet pipe 40 is connected to the inlet of the heat exchanger 30;
[0095] Hot water outlet pipe 50 is connected to the outlet of heat exchanger 30.
[0096] Understandably, the burner 20 has a combustion chamber inside, serving as the primary site for fuel combustion. The design of the burner 20 ensures complete fuel combustion, thereby improving thermal energy conversion efficiency. The smoke collection chamber 201 of the exhaust hood 10 is connected to the combustion chamber, effectively collecting the flue gas generated during combustion. The heat exchanger 30 is located inside the combustion chamber, fully utilizing the heat energy generated by combustion to heat the cold water flowing through it. The cold water inlet pipe 40 is connected to the inlet of the heat exchanger 30, introducing the cold water to be heated into the heat exchanger 30; while the hot water outlet pipe 50 is connected to the outlet of the heat exchanger 30, delivering the heated hot water to the user end.
[0097] According to the embodiments of this application, the gas water heater improves the overall performance of the gas water heater by optimizing the structural design of the exhaust hood 10.
[0098] It should be noted that the gas water heater of this application includes the aforementioned exhaust hood 10, and therefore has all the technical effects of the aforementioned exhaust hood 10, which will not be repeated here.
[0099] In one embodiment, a fan is also included, which is located on the side of the combustion chamber away from the exhaust hood 10, and is used to drive the flue gas in the combustion chamber to flow toward the exhaust hood 10.
[0100] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.
Claims
1. A fume hood for a gas water heater, characterized in that, include: The smoke exhaust component is provided with a smoke exhaust channel and a smoke exhaust outlet, wherein the smoke exhaust channel is connected to the smoke exhaust outlet; A smoke collection component is connected to the smoke exhaust component. The smoke collection component has a smoke collection chamber inside. The smoke collection chamber has a primary flow guiding structure on the side near the smoke exhaust port. The opening area of the primary flow guiding structure gradually decreases along the direction towards the smoke exhaust port. The smoke exhaust channel connects to the smoke collection chamber. The opening area of the smoke collection chamber is larger than the opening area of the smoke exhaust channel. A secondary flow guiding structure is provided at the connection between the smoke collection chamber and the smoke exhaust channel. The opening area of the secondary flow guiding structure gradually decreases along the direction towards the smoke exhaust port.
2. The exhaust hood of the gas water heater according to claim 1, characterized in that, The primary flow guiding structure is one of a chamfered structure and a rounded corner structure, used to guide the flue gas to smoothly transition from the smoke collection chamber to the smoke exhaust channel; And / or, The secondary flow guiding structure is one of a chamfered structure and a rounded corner structure, used to reduce the flow resistance of flue gas at the connection between the smoke collection chamber and the smoke exhaust channel.
3. The exhaust hood of the gas water heater according to claim 2, characterized in that, When the primary flow guiding structure is a chamfered structure, the inclination angle of the chamfered structure relative to the horizontal plane is 30°-60°; And / or, if the secondary flow guide structure is a chamfered structure, the angle of inclination of the chamfered structure relative to the horizontal plane is 45°-75°.
4. The exhaust hood of the gas water heater according to claim 2, characterized in that, When the primary flow guide structure is a rounded corner structure, the radius of curvature of the rounded corner structure is 5mm-15mm; And / or, When the secondary flow guide structure is a rounded corner structure, the radius of curvature of the rounded corner structure is 5mm-15mm.
5. The exhaust hood of the gas water heater according to claim 1, characterized in that, The smoke exhaust component includes a first smoke exhaust section and a second smoke exhaust section. The first smoke exhaust section is connected to the smoke collection component, and the second smoke exhaust section is connected to the first smoke exhaust section. The smoke exhaust port is located in the second smoke exhaust section. The first smoke exhaust section and the second smoke exhaust section form the smoke exhaust channel. The opening area of the first smoke exhaust section is larger than the opening area of the second smoke exhaust section.
6. The exhaust hood of the gas water heater according to claim 5, characterized in that, A three-stage flow guiding structure is provided at the connection between the first smoke exhaust section and the second smoke exhaust section, and the opening area of the three-stage flow guiding structure gradually decreases along the direction towards the smoke exhaust port.
7. The exhaust hood of the gas water heater according to claim 6, characterized in that, The three-stage flow guiding structure is one of a chamfered structure and a rounded corner structure.
8. The exhaust hood of the gas water heater according to claim 1, characterized in that, The smoke exhaust component includes a first smoke exhaust section and a second smoke exhaust section. The first smoke exhaust section is connected to the smoke collection component, and the second smoke exhaust section is connected to the first smoke exhaust section. The smoke exhaust port is located in the second smoke exhaust section. The first smoke exhaust section and the second smoke exhaust section form the smoke exhaust channel. The opening area of the first smoke exhaust section gradually decreases in the direction towards the smoke exhaust port, or the opening area of the second smoke exhaust section gradually decreases in the direction towards the smoke exhaust port.
9. The exhaust hood of a gas water heater according to any one of claims 1 to 8, characterized in that, The smoke collection component and the smoke exhaust component are integrally formed.
10. A gas water heater, characterized in that, include: The burner has an internal combustion chamber; The smoke hood according to any one of claims 1 to 9, wherein the smoke hood is connected to the burner, and the smoke collection chamber communicates with the combustion chamber; A heat exchanger is located in the combustion chamber; A cold water inlet pipe is connected to the inlet of the heat exchanger; A hot water outlet pipe is connected to the outlet of the heat exchanger.