Smoke exhaust cover assembly for gas water heater and gas water heater
Patent Information
- Application Number
- CN202522423993.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-14
AI Technical Summary
[0005]本实用新型的目的在于提出燃气热水器用排烟罩组件及燃气热水器，解决了现有排烟罩中气流紊乱噪音大的问题，排烟效果好
[0018]本实用新型公开的燃气热水器用排烟罩组件，导流斜面从拢烟顶壁的边沿平滑倾斜延伸而成，烟气能沿着导流斜面顺畅流动，提高排烟效率，减少烟气泄漏；沿烟气流动方向，导流部内的截面积逐渐减小，烟气流动更平稳，解决了现有排烟罩从排烟罩本体进入延伸嘴时因截面积突变导致气流紊乱的问题，烟气排放更顺畅，噪音小；整个排烟罩组件中气流更稳定，令燃气能更充分地燃烧，减少CO的排放量，节能环保。
Smart Images
Figure CN224905310U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water heater technology, and in particular to a smoke hood assembly for a gas water heater and a gas water heater. Background Technology
[0002] Gas water heaters use the heat generated by the combustion of gas to heat low-temperature inlet water into high-temperature outlet water for user use. Gas water heaters mainly consist of a burner, a heat exchanger, and a fume hood assembly. Gas burns at the burner to generate heat, which is then exchanged with the low-temperature inlet water at the heat exchanger. The flue gas produced by combustion is discharged through the fume hood assembly.
[0003] Existing gas water heater exhaust hood assemblies are typically hollow cubic structures with smoke outlets on their walls through which combustion gases are discharged. To improve exhaust velocity, a new exhaust hood assembly includes a hollow cubic hood body and an extension nozzle, the latter being smaller than the hood body. That is, perpendicular to the gas flow direction, the cross-sectional area of the hood body is larger than that of the extension nozzle. As the gas is discharged, it passes sequentially through the hood body and the extension nozzle; the smaller cross-sectional area increases the gas velocity, resulting in faster and more thorough exhaust.
[0004] The defects of existing smoke hood components include: when smoke enters the extension nozzle from the smoke hood body, the sudden change in cross-sectional area causes airflow turbulence. The turbulent airflow will hinder the normal flow of subsequent airflow, affecting the smooth entry of smoke in the smoke hood body into the extension nozzle, resulting in poor smoke extraction effect and high noise. Utility Model Content
[0005] The purpose of this utility model is to propose a smoke hood assembly and a gas water heater for gas water heaters, which solves the problems of turbulent airflow and high noise in existing smoke hoods and provides good smoke extraction effect.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A gas water heater exhaust hood assembly includes an exhaust hood body, the exhaust hood body comprising: a base portion, which is annular, with a smoke inlet formed in the middle of the base portion; a smoke collecting portion, including a smoke collecting sidewall and a smoke collecting top wall connected to each other, the smoke collecting sidewall extending from the edge of the smoke inlet in the middle of the base portion by bending, and the smoke collecting top wall extending from the edge of a portion of the smoke collecting sidewall by bending, the smoke collecting sidewall and the smoke collecting top wall forming a smoke collecting cavity communicating with the smoke inlet; and a flow guiding portion, including a smoothly connected flow guiding slope and a flow guiding top surface, the flow guiding slope extending smoothly and obliquely from the edge of the smoke collecting top wall, and a smoke outlet provided on the flow guiding top surface, the smoke outlet communicating with the smoke collecting cavity.
[0008] In one preferred embodiment, the base portion is a plate-like structure, and the extending direction of the smoke-collecting sidewall is perpendicular to the plane where the base portion is located.
[0009] In one preferred embodiment, the included angle α between the guide slope and the smoke collection top wall is [45°, 90°].
[0010] In one preferred embodiment, the flow guiding portion includes two flow guiding ramps and a flow guiding top surface, the two flow guiding ramps being respectively connected to opposite side edges of the flow guiding top surface, and the two flow guiding ramps having different extension lengths.
[0011] In one preferred embodiment, the outer periphery of the base portion extends along a bend to form a base sidewall, and a pressing flap is provided on the base sidewall for fixed connection to the heat exchanger.
[0012] In one preferred embodiment, the smoke hood assembly further includes a smoke exhaust pipe connected to the smoke outlet.
[0013] In one preferred embodiment, the edge of the smoke outlet is bent and extended to form a smoke exhaust sidewall, which is attached to the inner or outer sidewall of the smoke exhaust pipe.
[0014] In one preferred embodiment, the smoke hood body is integrally formed from sheet metal.
[0015] In one preferred embodiment, the fume hood assembly further includes a sealing gasket disposed on the side of the base portion facing the heat exchanger.
[0016] On the other hand, the present invention adopts the following technical solution:
[0017] A gas water heater, including a heat exchanger, and the gas water heater also includes the above-mentioned gas water heater exhaust hood assembly, with a base portion covering the heat exchanger.
[0018] The exhaust hood assembly for a gas water heater disclosed in this utility model features a guide slope that extends smoothly and inclined from the edge of the smoke collection top wall, allowing the flue gas to flow smoothly along the guide slope, improving exhaust efficiency and reducing flue gas leakage. Along the flue gas flow direction, the cross-sectional area within the guide section gradually decreases, resulting in more stable flue gas flow. This solves the problem of turbulent airflow caused by abrupt changes in cross-sectional area when the existing exhaust hood enters the extension nozzle from the exhaust hood body, leading to smoother flue gas emission and lower noise. The more stable airflow throughout the entire exhaust hood assembly allows for more complete combustion of the gas, reducing CO emissions and promoting energy conservation and environmental protection.
[0019] The gas water heater disclosed in this utility model includes the above-mentioned exhaust hood assembly for gas water heaters, which solves the problem of airflow turbulence caused by abrupt changes in the cross-sectional area of the flue gas flow path in the prior art. The flue gas flow is more stable, the noise is low, and the exhaust effect is good. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the internal structure of a gas water heater provided in a specific embodiment of this utility model;
[0021] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0022] Figure 3 This is a schematic diagram of the structure of the smoke hood body provided in a specific embodiment of this utility model;
[0023] Figure 4 This is an exploded view of the smoke hood assembly provided in a specific embodiment of this utility model.
[0024] In the picture:
[0025] 1. Smoke hood body; 2. Heat exchanger; 3. Smoke hood; 4. Sealing gasket; 11. Base; 12. Smoke collection side wall; 13. Smoke collection top wall; 14. Guide slope; 15. Guide top surface; 111. Base side wall; 112. Pressing flap; 151. Smoke outlet; 152. Smoke exhaust side wall. Detailed Implementation
[0026] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0030] In this utility model, unless otherwise explicitly 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.
[0031] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0032] This embodiment discloses a fume hood assembly for a gas water heater and a gas water heater, which can utilize the heat generated by gas combustion to heat low-temperature inlet water into high-temperature outlet water. For example... Figure 1 As shown, the gas water heater also includes a heat exchanger 2, a burner, a gas distributor, a fan, a water flow sensor, and a proportional valve. The gas water heater exhaust hood assembly includes an exhaust hood body 1, which is positioned above the heat exchanger 2. The other structural features of this gas water heater are the same as those in the prior art and will not be described further here.
[0033] like Figure 2 and Figure 3 As shown, the smoke hood body 1 includes a base portion 11, a smoke collection portion, and a flow guiding portion, wherein the base portion 11 is positioned above the heat exchanger 2. The smoke collection portion includes a smoke collection sidewall 12 and a smoke collection top wall 13 connected to each other. A smoke inlet is formed in the middle of the annular base portion 11. The smoke collection sidewall 12 extends from the edge of the smoke inlet in the middle of the base portion 11 by bending. The smoke collection top wall 13 extends from the edge of a portion of the smoke collection sidewall 12 by bending. The smoke collection sidewall 12 and the smoke collection top wall 13 form a smoke collection cavity communicating with the smoke inlet. Specifically, the smoke collection sidewall 12 includes four opposing surfaces, of which two opposing surfaces extend continuously upwards, and the edges of the other two opposing surfaces extend by bending to form the smoke collection top wall 13.
[0034] The guide section includes a smoothly connected guide slope 14 and a guide top surface 15. The guide slope 14 extends smoothly and obliquely from the edge of the smoke collecting top wall 13. A smoke outlet 151 is provided on the guide top surface 15, which connects to the smoke collecting chamber. That is, starting from the base 11, the smoke collecting section and the guide section form a two-layer structure that bulges upward in sequence. The base 11, the smoke collecting section, and the guide section together form a closed channel for the flow of flue gas generated by combustion. The flue gas enters from the smoke inlet, passes through the smoke collecting chamber, and is discharged after exiting through the smoke outlet 151.
[0035] The guide slope 14 extends smoothly and inclinedly from the edge of the smoke collection top wall 13. When the flue gas enters the guide section from the smoke collection section, it will hit the guide slope 14. After flowing along the guide slope 14, the flue gas can smoothly reach the smoke outlet 151, improving the smoke exhaust efficiency and reducing the leakage of flue gas. Along the direction of flue gas flow, the cross-sectional area in the guide section gradually decreases, making the flue gas flow more stable and the noise lower. The airflow in the entire smoke exhaust hood assembly is more stable, allowing the gas to burn more completely, reducing CO emissions, and saving energy and protecting the environment.
[0036] Based on the above structure, the base part 11 is a plate-shaped structure, and the extension direction of the smoke-collecting sidewall 12 is perpendicular to the plane of the base part 11. After assembly, the base part 11 is fastened to the top of the heat exchanger 2, and the smoke-collecting sidewall 12 is basically parallel to the flow direction of the flue gas, so that the flue gas can enter the smoke-collecting chamber without obstruction, thereby improving the flue gas emission efficiency; the edge of the smoke inlet is connected to the smoke-collecting sidewall 12, so that the flue gas at all points can enter the smoke-collecting chamber without obstruction, avoiding airflow turbulence caused by local smoke obstruction.
[0037] The specific inclination angle of the guide slope 14 relative to the smoke collection top wall 13 is not limited, as long as it can guide the flow and avoid abrupt changes in cross-sectional area. In this embodiment, the included angle α between the guide slope 14 and the smoke collection top wall 13 is [45°, 90°). That is, 45° ≤ included angle α < 90°. The guide slope 14 and the guide top surface 15 form a cone structure relative to the smoke collection top wall 13, which can prevent the diffusion and backflow of smoke, ensure that the smoke can be smoothly discharged from the smoke outlet 151, improve the smoke exhaust efficiency, and reduce eddies and noise.
[0038] Based on the above structure, the flow guiding section includes two flow guiding slopes 14 and a flow guiding top surface 15. The two flow guiding slopes 14 are respectively connected to the opposite two side edges of the flow guiding top surface 15. That is, one flow guiding slope 14, the flow guiding top surface 15 and the other flow guiding slope 14 are connected in sequence, and the three together with the top of the smoke collecting side wall 12 located on the side (i.e., the two oppositely arranged surfaces that extend continuously upward) form a chamber for the flow of flue gas.
[0039] The two guide slopes 14 have different extension lengths (or inclination angles), so the smoke outlet 151 on the top surface 15 of the guide slope can be offset from the center of the exhaust hood assembly to adapt to the internal space of the gas water heater and avoid collision between the smoke outlet 151 and other structures inside the gas water heater. The specific extension length (or inclination angle) of the two guide slopes 14 is not limited; the extension length (or inclination angle) of the two guide slopes 14 can be adjusted according to the suitable location of the smoke outlet 151, making it suitable for various specifications and models of gas water heaters without requiring modification of the internal structure of the gas water heater for the installation of the exhaust hood assembly.
[0040] Based on the above structure, the outer periphery of the base part 11 bends downward to form a base sidewall 111. During assembly, the base sidewall 111 is fastened to the outer periphery of the top surface of the heat exchanger 2, so that the base part 11 and the heat exchanger 2 can be positioned more quickly, improving installation efficiency.
[0041] Multiple pressing flaps 112 are provided on the base sidewall 111, which are used to fix the heat exchanger 2. Using pressing flaps 112 instead of screws for fixing reduces costs; it also eliminates the need for pre-drilling, improving processing efficiency. The specific shape of the pressing flaps 112 is not limited, as long as they form a protruding structure on the bottom edge of the base sidewall 111. During assembly, the base sidewall 111 is fastened to the outer periphery of the top surface of the heat exchanger 2, and the pressing flaps 112 are bent toward the heat exchanger 2 until they abut against the outer wall of the heat exchanger 2 or are fastened to the fastening structure of the heat exchanger 2, thus completing the assembly of the fume hood assembly with the heat exchanger 2.
[0042] To prevent smoke leakage, in this embodiment, the smoke hood body 1 is integrally formed from sheet metal. The smoke hood body 1 itself has no gaps, has good sealing performance, eliminates the risk of smoke leakage, and is safer to use; smoke can flow smoothly inside the smoke hood body 1, resulting in better smoke extraction effect; and the high structural strength ensures a longer service life for the smoke hood body 1.
[0043] Based on the above structure, such as Figures 1 to 4 As shown, the smoke hood assembly also includes a smoke exhaust duct 3 through which smoke can flow. Specifically, one end of the smoke exhaust duct 3 is connected to a smoke outlet 151, through which smoke can enter the smoke exhaust duct 3; the other end of the smoke exhaust duct 3 is connected to the outside or a purification device for discharging or purifying the smoke.
[0044] To prevent smoke leakage at the connection between the exhaust pipe 3 and the smoke outlet 151, the edge of the smoke outlet 151 is bent and extended to form an exhaust sidewall 152. The exhaust sidewall 152 fits tightly against the inner or outer wall of the exhaust pipe 3. A sealant or sealing material can also be added between the exhaust sidewall 152 and the exhaust pipe 3 to ensure that there are no gaps between the exhaust sidewall 152 and the exhaust pipe 3, preventing smoke from overflowing and making it safer to use.
[0045] To prevent flue gas from leaking out of the gap between the base 11 and the heat exchanger 2, in this embodiment, the fume hood assembly also includes a sealing gasket 4. The sealing gasket 4 is disposed on the side of the base 11 facing the heat exchanger 2. After assembly, the sealing gasket 4 fills the gap between the base 11 and the heat exchanger 2, blocking the path of flue gas leakage.
[0046] The specific shape of the sealing gasket 4 is not limited, as long as it can fill the gap between the base 11 and the heat exchanger 2. The specific material used to prepare the sealing gasket 4 is not limited, as long as it has a certain degree of elastic deformation ability and can prevent flue gas leakage. In this embodiment, the sealing gasket 4 is annular and made of asbestos, which has a good sealing effect on flue gas.
[0047] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.
Claims
1. A fume hood assembly for a gas water heater, comprising a fume hood body (1), characterized in that, The smoke hood body (1) includes: The base portion (11) is annular, and a smoke inlet is formed in the middle of the base portion (11); The smoke-collecting section includes a smoke-collecting sidewall (12) and a smoke-collecting top wall (13) connected to each other. The smoke-collecting sidewall (12) extends from the edge of the smoke inlet in the middle of the base section (11) by bending, and the smoke-collecting top wall (13) extends from the edge of a portion of the smoke-collecting sidewall (12) by bending. The smoke-collecting sidewall (12) and the smoke-collecting top wall (13) form a smoke-collecting cavity communicating with the smoke inlet; and, The guide section includes a smoothly connected guide slope (14) and a guide top surface (15). The guide slope (14) extends smoothly and obliquely from the edge of the smoke collecting top wall (13). The guide top surface (15) is provided with a smoke outlet (151), which is connected to the smoke collecting chamber.
2. The exhaust hood assembly for a gas water heater according to claim 1, characterized in that, The base part (11) is a plate-shaped structure, and the extension direction of the smoke-collecting sidewall (12) is perpendicular to the plane where the base part (11) is located.
3. The exhaust hood assembly for a gas water heater according to claim 1, characterized in that, The angle α between the guide slope (14) and the smoke collection top wall (13) is [45°, 90°].
4. The exhaust hood assembly for a gas water heater according to claim 1, characterized in that, The flow guide includes two flow guide slopes (14) and a flow guide top surface (15). The two flow guide slopes (14) are respectively connected to the opposite two sides of the flow guide top surface (15), and the extension lengths of the two flow guide slopes (14) are different.
5. The exhaust hood assembly for a gas water heater according to claim 1, characterized in that, The outer periphery of the base portion (11) extends along a bend to form a base sidewall (111), and a pressing flap (112) is provided on the base sidewall (111). The pressing flap (112) is used to be fixedly connected to the heat exchanger (2).
6. The exhaust hood assembly for a gas water heater according to claim 1, characterized in that, The smoke hood assembly also includes a smoke exhaust pipe (3) connected to the smoke outlet (151).
7. The exhaust hood assembly for a gas water heater according to claim 6, characterized in that, The edge of the smoke outlet (151) is bent and extended to form a smoke exhaust sidewall (152), which is attached to the inner or outer sidewall of the smoke exhaust pipe (3).
8. The exhaust hood assembly for a gas water heater according to any one of claims 1 to 7, characterized in that, The smoke hood body (1) is integrally formed from sheet metal.
9. The exhaust hood assembly for a gas water heater according to any one of claims 1 to 7, characterized in that, The fume hood assembly also includes a sealing gasket (4), which is disposed on the side of the base portion (11) facing the heat exchanger (2).
10. A gas-fired water heater, including a heat exchanger (2), characterized in that, The gas water heater further includes a gas water heater exhaust hood assembly as described in any one of claims 1 to 9, with the base portion (11) covering the heat exchanger (2).