Exhaust fume collecting hood of fan

Abstract

The utility model discloses an exhaust fume collecting hood of a fan, which comprises a front plate and a rear plate, an arc-shaped side plate assembly used for connection is arranged between the front plate and the rear plate. The arc-shaped side plate assembly comprises a first connecting plate and a second connecting plate which are connected in sequence; the front plate, the rear plate and the arc-shaped side plate assembly are connected to form a smoke gathering cavity, an air inlet is formed in the lower side of the smoke gathering cavity, an air outlet communicated with the smoke gathering cavity is formed in the arc-shaped side plate assembly, the second connecting plate comprises a flow guide plate right facing the air inlet, and the flow guide plate can more effectively guide oil smoke to enter the smoke gathering cavity; the air inlet is formed below the smoke gathering cavity and is staggered from the air outlet, so that air can be exhausted smoothly, vortex can be reduced, noise caused by vibration of the fan volute can be prevented, and the noise can be reduced; in addition, by means of the design, oil smoke generated by the cooking bench can be effectively collected and discharged, and air in a kitchen is kept fresh.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, in particular to a fan smoke collecting hood. Background Art

[0002] At present, some gas water heaters on the market have a lot of running noise. The water heater noise mainly comes from fan noise, combustion noise and heat exchanger water flow noise, and the fan running noise often accounts for a high proportion. Fan noise includes aerodynamic noise and mechanical noise. Aerodynamic noise is composed of two parts: periodic exhaust noise and vortex noise. When the fan impeller operates under certain pressure conditions, it periodically squeezes the gas and hits the gas molecules, causing the gas around the impeller to produce velocity and pressure pulsations, and radiates to the impeller in the form of sound waves, which produces periodic exhaust noise. When the impeller is running at high speed, a large number of gas vortices will form on its surface. When these gas vortices separate on the impeller interface, vortex noise is generated.

[0003] In the "DC fan volute for low-noise gas water heater" disclosed in the prior art, it includes a front plate and a rear plate, an annular intermediate shell is arranged between the front plate and the rear plate, the front plate, the rear plate and the annular intermediate shell form a wind cavity, the front plate is provided with an air inlet connected to the wind cavity, the annular intermediate shell is provided with a notch, the front plate, the rear plate and the annular intermediate shell form an air outlet located at the notch, the air outlet is connected to the wind cavity, and the annular intermediate shell is recessed inward to form a transition surface located at the transition between the air outlet and the wind cavity. Although the annular intermediate shell of the above-mentioned fan volute is arc-shaped, which solves the resistance of the angular structure to exhaust air, thereby reducing noise, vortices are easily generated in the air flow at the air outlet, the fan volute vibrates to generate large noise, and the exhaust efficiency is reduced. Summary of the invention

[0004] The invention provides a fan smoke hood with simple structure, low noise and high exhaust efficiency.

[0005] The technical solution of the utility model is as follows: a fan smoke collecting hood, comprising a front plate and a rear plate; an arcuate side plate assembly for connection is provided between the front plate and the rear plate; the arcuate side plate assembly comprises a first connecting plate and a second connecting plate connected in sequence; the front plate, the rear plate and the arcuate side plate assembly are connected to form a smoke collecting chamber, an air inlet is provided on the lower side of the smoke collecting chamber, an air outlet connected to the smoke collecting chamber is provided on the second connecting plate, and the second connecting plate comprises a guide plate facing the air inlet.

[0006] Preferably, reinforcement structures are provided on both the front plate and the rear plate.

[0007] Preferably, the reinforcement structure is in the shape of an annular groove, and the convex surface of the annular groove faces the inner side of the smoke collecting cavity.

[0008] Preferably, the second connecting plate further comprises a first arc plate, a second arc plate and a fourth mounting plate which are smoothly connected, the guide plate is located between the first arc plate and the second arc plate, and the guide plate is tilted toward the air outlet.

[0009] Preferably, a first transition curved surface is provided at the connection between the first arc plate and the guide plate, and a second transition curved surface is provided at the connection between the second arc plate and the fourth mounting plate.

[0010] Preferably, the first transition curved surface is smoothly connected to the first arc plate and the guide plate, respectively, and the second transition curved surface is smoothly connected to the second arc plate and the fourth mounting plate, respectively.

[0011] Preferably, the lower sides of the first connecting plate and the first arc-shaped plate are both provided with long arc-shaped notches, and the symmetrically distributed long arc-shaped notches serve as air inlets for air intake.

[0012] Preferably, a circular air outlet is provided in the middle of the fourth mounting plate.

[0013] Preferably, the curvatures of the first transition curved surface and the second transition curved surface are greater than the curvatures of the first arc plate, the guide plate, the second arc plate and the fourth mounting plate.

[0014] Preferably, the arc-shaped side panel assembly is provided with a plurality of locking brackets for fixing the fan smoke hood. Compared with the prior art, the utility model has the following beneficial effects:

[0015] A fan smoke hood, the front plate and the rear plate are connected by an arc-shaped side plate assembly, which can increase the structural strength of the smoke hood, and at the same time, the arc-shaped side plate can more effectively guide the oil smoke into the smoke collecting chamber. The air inlet is arranged below the smoke collecting chamber and is staggered with the air outlet, which can ensure smooth air discharge, reduce the generation of vortex, prevent the fan volute from vibrating and generating noise, and thus reduce noise. The second connecting plate includes a guide plate facing the air inlet, which can guide the oil smoke from the air inlet to the air outlet to prevent the oil smoke from spreading.

[0016] Furthermore, the reinforced structure enhances the structural strength of the front and rear panels, disperses and withstands the pressure generated by the fan and oil smoke, prevents the panel surface from deformation or damage, and thus improves the durability and stability of the entire smoke hood.

[0017] Furthermore, the convex surface of the annular groove faces the inside of the smoke collecting chamber, which helps to better guide the oil smoke into the smoke collecting chamber. The raised part forms a guiding structure, so that when the oil smoke contacts the front plate or the rear plate, it can flow into the smoke collecting chamber more smoothly along the convex surface instead of spreading outside the plate surface.

[0018] Furthermore, the design of multiple arc plates enables it to collect and guide oil smoke more effectively. Each arc plate is smoothly connected to avoid sharp corners or uneven transitions, which helps to reduce the adhesion of oil smoke on the side panels and the generation of vortices; allowing it to enter the smoke collection chamber more smoothly, thereby improving the smoke collection efficiency.

[0019] Furthermore, the first transition curved surface and the second transition curved surface enhance the continuity and smoothness of the structure, optimize the flow characteristics of the oil smoke, and thus improve the smoke collection effect; make the connection between the arc plates smoother, avoid sharp corners or mutations, and reduce the adhesion and accumulation of oil smoke at the connection. Improve the stability of the entire device; and disperse and balance the stress distribution of the arc side panel assembly when it is stressed, thereby improving the bearing capacity of the overall structure.

[0020] Furthermore, the smooth connection design ensures that the oil smoke can smoothly pass through the curved side panel assembly during the flow process without generating eddies or turbulence due to sharp corners or uneven connections, and also improves the overall aesthetics of the fan smoke hood.

[0021] Furthermore, the long arc-shaped notch increases the area of ​​the air inlet, thereby allowing more oil smoke to enter the smoke collecting chamber. The symmetrically distributed long arc-shaped notches help ensure that the oil smoke can be evenly distributed when the air enters, reducing the generation of eddies and turbulence.

[0022] Furthermore, the circular air outlet can provide a stable and efficient exhaust effect. The circular structure itself has excellent fluid mechanics properties, which can reduce the turbulence and eddy currents of the air at the outlet, making the exhaust smoother and more uniform. This helps to ensure that the oil smoke can be quickly discharged through the air outlet under the action of the fan, preventing it from being trapped inside the fume hood.

[0023] Furthermore, the larger curvature design of the transition surface helps to reduce the flow resistance of the oil smoke at the connection point, so that the entire smoke collection cavity can more smoothly guide the oil smoke from one curved plate to another curved plate, reducing the eddy current and turbulence caused by the change in curvature. This helps to maintain the stability of the oil smoke flow and improve the smoke collection efficiency.

[0024] Furthermore, the overall stability of the fan hood is enhanced. The hood can be firmly fixed to the wall or other supporting structure through the locking bracket, effectively preventing it from shaking or shifting during operation. The design of multiple locking brackets makes the installation process more convenient and flexible. The installer can choose the appropriate bracket position and number according to actual needs to adapt to different installation environments and requirements. This flexibility not only improves installation efficiency, but also enables the hood to adapt to more types of kitchen layouts.

[0025] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] Figure 1 This is a structural schematic diagram of a fan smoke collection hood of the utility model;

[0028] Figure 2 This is a structural side view of a fan smoke collection hood of the utility model;

[0029] The following are the descriptions of the reference numerals:

[0030] Front plate 1, rear plate 2, arc-shaped side plate assembly 3, air inlet 5, air outlet 6, reinforcement structure 7, first connecting plate 3-1, second connecting plate 3-2, first arc-shaped plate 3-2-1, guide plate 3-2-2, second arc-shaped plate 3-2-3, fourth mounting plate 3-2-4, first transition curved surface 3-2-5, second transition curved surface 3-2-6, long arc-shaped notch 5-1, locking bracket 8. DETAILED DESCRIPTION

[0031] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0032] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0033] like Figure 1 to Figure 2As shown, a fan smoke collecting hood comprises a front plate 1 and a rear plate 2; an arc-shaped side plate assembly 3 for connection is provided between the front plate 1 and the rear plate 2; the arc-shaped side plate assembly 3 increases the structural strength of the smoke collecting hood, wherein the arc more effectively guides the oil smoke into the smoke collecting chamber, the smoke collecting chamber is formed by connecting the front plate 1, the rear plate 2 and the arc-shaped side plate assembly 3, when the stove produces oil smoke, the oil smoke will be effectively sucked in and concentrated in the smoke collecting chamber to prevent it from spreading to the surroundings; an air inlet 5 is provided on the lower side of the smoke collecting chamber to allow the oil smoke to enter the smoke collecting chamber so as to better collect the oil smoke; an air outlet 6 connected to the smoke collecting chamber is provided on the arc-shaped side plate assembly 3, the air outlet 6 ensures that the oil smoke is effectively discharged and will not remain in the smoke collecting hood; the air inlet 5 and the air outlet 6 are staggered to ensure smooth exhaust and reduce the generation of vortex, prevent the fan volute from vibrating and generating large noise, and reduce noise; and effectively collect and discharge the oil smoke generated by the stove to keep the air in the kitchen fresh. The second connecting plate 3 - 2 includes a guide plate 3 - 2 - 2 facing the air inlet 5 . The guide plate 3 - 2 - 2 can smoothly guide the oil smoke from the air inlet 5 to the air outlet 6 to prevent the oil smoke from spreading from the air inlet 5 .

[0034] Furthermore, when the air inlet 5 is provided, the lower sides of the first connecting plate 3-1 and the first arc plate 3-2-1 are provided with long arc-shaped notches 5-1, and the symmetrically distributed long arc-shaped notches 5-1 are also air inlets 5 for air intake, so that when the fan smoke hood is assembled, the air inlet 5 is at the bottom of the entire device, and the area of ​​the air inlet can be increased, thereby allowing more oil smoke to enter the smoke chamber. A circular air outlet 6 is provided in the middle of the fourth mounting plate 3-2-4, and the circular air outlet 6 provides a stable and efficient exhaust effect, ensuring that the oil smoke is evenly distributed in the smoke chamber, avoiding excessive accumulation or poor exhaust on one side, reducing the generation of vortices, and reducing the noise generated by the device.

[0035] Among them, the front plate 1 and the rear plate 2 are both provided with a reinforcement structure 7. In this embodiment, the reinforcement structure 7 is an annular groove, and the reinforcement structure 7 is equidistantly arranged in an annular shape on the front plate 1 and the rear plate 2. The equidistantly arranged reinforcement structure 7 realizes uniform pressure distribution and smoke flow control, and enhances the structural strength and stability of the front plate 1 and the rear plate 2; the convex surface of the groove faces the inner side of the smoke collection cavity, which more effectively guides or controls the flow of smoke, and the convex surface helps to enhance the smoke collection effect, making the smoke easier to be inhaled and discharged.

[0036] Furthermore, the arcuate side panel assembly 3 is formed by sequentially splicing a first connecting plate 3-1 and a second connecting plate 3-2, and the opening formed by the first connecting plate 3-1 and the second connecting plate 3-2 is the above-mentioned air inlet 5, so that the generated oil smoke can be collected more effectively; wherein, the second connecting plate 3-2 is composed of a plurality of arcuate side panels and transition surfaces connecting the arcuate side panels, and the plurality of arcuate side panels include a first arcuate plate 3-2-1, a guide plate 3-2-2, a second arcuate plate 3-2-3 and a fourth mounting plate 3-2-4 which are smoothly connected in sequence; a first transition surface 3-2-5 is provided at the connection between the first arcuate plate 3-2-1 and the guide plate 3-2-2, and a second transition surface 3-2-6 is provided at the connection between the second arcuate plate 3-2-3 and the fourth mounting plate 3-2-4; the design of multiple arcuate side panels allows for more flexible adaptation to the shape of the smoke collecting chamber, thereby more effectively collecting and guiding the oil smoke. The transition surfaces are smoothly connected to avoid sharp corners or uneven transitions, which helps to reduce the adhesion of oil smoke on the side panels and the generation of vortices.

[0037] The guide plate 3-2-2 is tilted toward the air outlet 6 to prevent the oil smoke from spreading from the air outlet 6. The angle between the second arc plate 3-2-3, the second transition curved surface 3-2-6 and the fourth mounting plate 3-2-4 is greater than 90 degrees in the smoke collecting cavity.

[0038] Among them, the first transition curved surface 3-2-5 is smoothly connected with the first curved plate 3-2-1 and the guide plate 3-2-2 respectively, and the second transition curved surface 3-2-6 is smoothly connected with the second curved plate 3-2-3 and the fourth mounting plate 3-2-4 respectively. The smooth connection of the curved surfaces enhances the structural strength and stability of the curved side panel assembly 3, making the appearance of the curved side panel assembly 3 more smooth and coordinated, which is in line with the design style of the entire smoke hood.

[0039] Furthermore, the curvature of the first transition surface 3-2-5 and the second transition surface 3-2-6 is greater than the curvature of the first arc plate 3-2-1, the guide plate 3-2-2, the second arc plate 3-2-3 and the fourth mounting plate 3-2-4; the larger curvature can enhance the structural strength of the transition surface, and the surface with a larger curvature can better disperse and withstand stress when subjected to external force, thereby reducing deformation or damage caused by stress concentration.

[0040] The arc-shaped side panel assembly 3 is provided with a plurality of locking brackets 8 for fixing the fan smoke hood, and the locking brackets 8 also have a certain load-bearing capacity and can support the weight of the smoke hood and its accessories. This helps to reduce the stress concentration phenomenon caused by uneven weight distribution and further improves the structural stability of the smoke hood.

[0041] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A fan smoke hood, characterized in that: The invention comprises a front plate (1) and a rear plate (2); an arc-shaped side plate assembly (3) for connection is arranged between the front plate (1) and the rear plate (2); the arc-shaped side plate assembly (3) comprises a first connecting plate (3-1) and a second connecting plate (3-2) which are connected in sequence; the front plate (1), the rear plate (2) and the arc-shaped side plate assembly (3) are connected to form a smoke collecting chamber, an air inlet (5) is arranged on the lower side of the smoke collecting chamber, an air outlet (6) which is connected to the smoke collecting chamber is arranged on the second connecting plate (3-2), and the second connecting plate (3-2) comprises a guide plate (3-2-2) which is directly opposite to the air inlet (5).

2. The fan smoke hood according to claim 1, characterized in that: The front plate (1) and the rear plate (2) are both provided with a reinforcement structure (7).

3. The fan smoke hood according to claim 2, characterized in that: The reinforcing structure (7) is in the shape of an annular groove, with the convex surface of the annular groove facing the inner side of the smoke collecting cavity.

4. The fan smoke hood according to claim 1, characterized in that: The second connecting plate (3-2) further comprises a first curved plate (3-2-1), a second curved plate (3-2-3) and a fourth mounting plate (3-2-4) which are smoothly connected, the guide plate (3-2-2) is located between the first curved plate (3-2-1) and the second curved plate (3-2-3), and the guide plate (3-2-2) is arranged to be inclined toward the air outlet (6).

5. The fan smoke hood according to claim 4, characterized in that: A first transition curved surface (3-2-5) is provided at the connection between the first arc-shaped plate (3-2-1) and the guide plate (3-2-2), and a second transition curved surface (3-2-6) is provided at the connection between the second arc-shaped plate (3-2-3) and the fourth mounting plate (3-2-4).

6. The fan smoke hood according to claim 5, characterized in that: The first transition curved surface (3-2-5) is smoothly connected to the first arc plate (3-2-1) and the guide plate (3-2-2), and the second transition curved surface (3-2-6) is smoothly connected to the second arc plate (3-2-3) and the fourth mounting plate (3-2-4).

7. The fan smoke hood according to claim 4, characterized in that: Long arc-shaped notches (5-1) are provided on the lower sides of the first connecting plate (3-1) and the first arc-shaped plate (3-2-1), and the symmetrically distributed long arc-shaped notches (5-1) serve as air inlets (5) for air intake.

8. The fan smoke hood according to claim 4, characterized in that: A circular air outlet (6) is provided in the middle of the fourth mounting plate (3-2-4).

9. The fan fume hood according to claim 5, characterized in that: The curvatures of the first transition curved surface (3-2-5) and the second transition curved surface (3-2-6) are greater than the curvatures of the first curved plate (3-2-1), the guide plate (3-2-2), the second curved plate (3-2-3) and the fourth mounting plate (3-2-4).

10. The fan fume hood according to claim 1, characterized in that: The arc-shaped side panel assembly (3) is provided with a plurality of locking brackets (8) for fixing the fan smoke collecting hood.

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