Range hood with noise reduction guide plate

Abstract

The range hood comprises a shell, a fan and a control assembly which are arranged in the shell, and an exhaust fume collecting hood arranged at the bottom of the shell, the fan is vertically arranged in the shell, a fume inlet of the fan is opposite to the inner wall of the rear side of the shell, a fume guide cavity is formed between the fan and the inner wall of the rear side of the shell, and the noise reduction guide plate is obliquely arranged on the upper portion of the fume guide cavity. The upper end of the noise reduction flow guide plate is located above the smoke inlet and fixedly connected with the top wall of the machine shell, and the lower end of the noise reduction flow guide plate is opposite to the smoke inlet and connected with the rear side wall of the machine shell in a clamped mode. Compared with the prior art, the range hood provided with the noise reduction flow guide plate has the advantages that the upper end of the noise reduction flow guide plate is connected with the top wall through the two screws, so that the noise reduction flow guide plate can bear direct impact of airflow without deformation or vibration, and secondary noise is avoided; the lower end of the noise reduction flow guide plate is clamped with the rear side wall of the machine shell, the placement angle of the noise reduction flow guide plate can be limited through clamping matching, and the installation precision of the noise reduction flow guide plate is guaranteed.

Description

A range hood equipped with a noise-reducing baffle Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a range hood equipped with a noise reduction guide plate. Background Technology

[0002] As an essential kitchen appliance, the range hood purifies the kitchen environment and enhances the cooking experience. It draws the mixture of cooking fumes and water vapor into a fan and then expels it using the air pressure generated by the fan. In today's kitchen appliance market, range hood performance faces unprecedented challenges. With shrinking living spaces and increasing building density, noise control has become a key concern for consumers when purchasing range hoods. Current technology primarily reduces noise by placing regularly arranged small holes near the volute or air inlet and attaching sound-absorbing cotton to their surface. While this design addresses the noise reduction need, it can obstruct airflow, easily generating secondary noise due to airflow impact. Furthermore, it suffers from poor structural adaptability, complex disassembly and assembly, and is difficult to repair and maintain.

[0003] Top-mounted range hoods generally include a decorative hood, a smoke collection hood located below the decorative hood, and a fan located inside the decorative hood. For a compact structure, the fan is usually installed vertically inside the decorative hood, unlike the inclined fan in side-mounted range hoods. The rear inner wall of the decorative hood forms a smoke guiding chamber with the range hood, where the gas flow velocity is relatively high. Sound-absorbing cotton is usually placed on the rear inner wall of the hood to reduce the noise of the range hood. However, there is a cavity between the top of the decorative hood and the air inlet of the range hood, where airflow turbulence occurs, resulting in noticeable noise.

[0004] For example, Chinese patent No. 216844809U discloses a range hood, including a casing with a chamber; a fan disposed within the chamber, the distance between the fan and the front wall of the chamber being less than the distance between the fan and the rear wall of the chamber; and a flow-guiding and noise-reducing component disposed on the rear wall of the chamber and including a body, the body comprising a base plate and an arc-shaped plate, the base plate having multiple spaced-apart silencers, and the arc-shaped plate extending from the top of the base plate toward the fan and curving upwards. While this design incorporates an upwardly curving arc-shaped plate at the top of the base plate, effectively guiding fumes to the fan, its structure is complex and production costs are high. Both the base plate and the arc-shaped plate are fixed to the rear wall by third and fourth side plates, requiring the cutting of matching arc-shaped plates from the third and fourth side plates, resulting in high process and material costs. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a range hood with a noise reduction guide plate that has a simple structure, can guide airflow, reduce noise, and prevent secondary noise.

[0006] The main technical solution of the range hood with noise reduction guide plate provided by this utility model is as follows: it includes a housing, a fan and control components installed inside the housing, a smoke collection hood installed at the bottom of the housing, the fan is vertically installed inside the housing, the smoke inlet of the fan is opposite to the rear inner wall of the housing, a smoke guiding cavity is formed between the fan and the rear inner wall of the housing, a noise reduction guide plate is inclinedly installed on the upper part of the smoke guiding cavity, the upper end of the noise reduction guide plate is located above the smoke inlet and is fixedly connected to the top wall of the housing, and the lower end of the noise reduction guide plate is opposite to the smoke inlet and is engaged with the rear wall of the housing.

[0007] The range hood with noise reduction guide plate provided by this utility model also adopts the following auxiliary technical solutions:

[0008] Preferably, the noise reduction guide plate includes a main board, multiple sound guide holes on the main board, sound-absorbing cotton covering the main board, a first fixing plate on the upper end of the main board and a second fixing plate on the lower end of the main board. The first fixing plate is fixedly connected to the top plate of the casing by screws, and the second fixing plate is engaged with the rear side wall of the casing.

[0009] Preferably, the sum of the areas of the multiple sound guide holes on the motherboard is 58% to 68% of the motherboard area.

[0010] Preferably, the upper end of the motherboard is bent upward to form a first clamping plate, and the upper end of the first clamping plate is bent horizontally to form a first fixing plate; the left and right sides of the motherboard are bent upward to form a second clamping plate and a third clamping plate, respectively; the lower end of the motherboard is bent upward to form a second fixing plate, and the two sides of the second fixing plate extend outward to form snap-fit ​​parts, which snap-fit ​​with the rear side wall of the housing; a sound-absorbing cotton limiting groove is formed between the first clamping plate, the second clamping plate, the third clamping plate and the second fixing plate.

[0011] Preferably, the first clamping plate, the second clamping plate, and the third clamping plate are all provided with limiting buckles, and the upper end of the second fixing plate is bent and extended inward toward the main plate to form a pressing plate. The limiting buckles and the pressing plate are respectively pressed against the edge of the sound-absorbing cotton.

[0012] Preferably, the main board, the first fixing plate, the second fixing plate, the snap-fit ​​part, the first clamping plate, the third clamping plate, the limiting buckle and the clamping plate are integrally formed.

[0013] Preferably, the angle between the first clamping plate and the motherboard is a right angle, the first fixing plate is parallel to the top plate of the housing, the second fixing plate is parallel to the rear side plate of the housing, the angle between the second fixing plate and the motherboard is an acute angle, and the angle between the plane of the first fixing plate and the motherboard is an acute angle.

[0014] Preferably, the angle between the first clamping plate and the main board is a right angle, and the clamping plate is parallel to the main board.

[0015] Preferably, the length of the first clamping plate is less than the length of the upper side of the motherboard, the length of the second clamping plate is less than the length of the left side of the motherboard, and the length of the third clamping plate is less than the length of the right side of the motherboard.

[0016] Preferably, a reinforcing rib is provided between the first clamping plate and the first fixing plate.

[0017] Preferably, the housing includes a cylindrical structure formed by a front panel, a left side panel, a right side panel, and a rear side panel, as well as a top plate at the upper end of the cylindrical structure and a bottom plate at the lower end of the cylindrical structure. The front panel, the left side panel, and the right side panel are integrally formed. The rear edge of the left side panel and the right side panel are provided with connecting plates parallel to the rear side panel. The rear side panel is connected to the connecting plates, and a snap-fit ​​gap is formed between the connecting plates and the rear side panel. The snap-fit ​​parts on both sides of the second fixing plate are located in the snap-fit ​​gap.

[0018] Compared with the prior art, the range hood with noise-reducing guide plate provided by this utility model has the following advantages: The upper end of the noise-reducing guide plate in this utility model is connected to the top wall by two screws, which can withstand the direct impact of airflow without deformation or vibration, thus avoiding secondary noise; The lower end of the noise-reducing guide plate is snapped into the rear side wall of the casing, which can limit the placement angle of the noise-reducing guide plate, ensure the installation accuracy of the noise-reducing guide plate, and is easy to disassemble and assemble with high assembly efficiency; The inclined setting of the noise-reducing guide plate in the smoke guiding cavity can extend the propagation path of sound waves inside the noise-reducing guide plate, improve the noise reduction effect, and also play a guiding role, allowing the airflow to enter the volute fan more smoothly, thereby improving the noise reduction efficiency. Attached Figure Description

[0019] Figure 1 is a structural diagram of the present invention with the rear side panel of the casing removed.

[0020] Figure 2 is a structural diagram of the noise reduction guide plate and sound-absorbing cotton in this utility model.

[0021] Figure 3 is a structural diagram of the noise reduction guide plate and sound-absorbing cotton in this utility model.

[0022] Figure 4 is a structural diagram of the noise reduction guide plate in this utility model.

[0023] Figure 5 is a cross-sectional view of the housing in this utility model.

[0024] Figure 6 is a structural diagram of this utility model. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Referring to Figures 1 to 6, the embodiment of the range hood with a noise-reducing guide plate provided by the utility model includes a housing 1, a fan 2 disposed within the housing 1, and control components. A smoke collection hood 4 is disposed at the bottom of the housing 1. The fan 2 is vertically disposed within the housing 1, with its smoke inlet 21 facing the rear inner wall of the housing 1. A smoke guiding cavity 101 is formed between the fan 2 and the rear inner wall of the housing 1. A noise-reducing guide plate 3 is inclinedly disposed on the upper part of the smoke guiding cavity 101. The upper end of the noise-reducing guide plate 3 is located above the smoke inlet 21 and is fixedly connected to the top wall of the housing 1. The lower end of the noise-reducing guide plate 3 faces the smoke inlet 21 and is engaged with the rear wall of the housing 1. The aforementioned control components and smoke collection hood are relatively mature technologies in the prior art and will not be described in detail here. The noise reduction guide plate 3 in this invention is connected to the top wall at the upper end by two screws, which can withstand the direct impact of airflow without deformation or vibration, thus avoiding secondary noise. The lower end of the noise reduction guide plate 3 is snapped into the rear side wall of the housing 1. The snap-fit ​​can limit the placement angle of the noise reduction guide plate 3, ensure the installation accuracy of the noise reduction guide plate 3, and make disassembly and assembly convenient and efficient. The noise reduction guide plate 3 is inclined in the smoke guiding cavity 101, which can extend the propagation path of sound waves inside the noise reduction guide plate 3, improve the noise reduction effect, and also play a guiding role, so that the airflow can enter the volute fan 2 more smoothly, thereby improving the silencing efficiency.

[0027] Referring to Figures 2 and 3, according to the above-described embodiment of the utility model, the noise reduction guide plate 3 includes a main board 31, a plurality of sound guide holes 311 disposed on the main board 31, sound-absorbing cotton 301 covering the main board 31, a first fixing plate 32 disposed on the upper end of the main board 31, and a second fixing plate 33 disposed on the lower end of the main board 31. The first fixing plate 32 is fixedly connected to the top plate 16 of the housing 1 by screws, and the second fixing plate 33 is snap-fitted into the rear side wall of the housing 1. The sound guide holes 311 in this utility model are different from the sound-absorbing holes in the prior art. The single hole area of ​​the sound guide hole 311 in this solution is 1300mm². 2 -1400mm 2 Preferably 1360mm 2 The noise reduction guide plate 3 of this structure, with its sound guide hole 311, can better guide sound waves into the depth of the sound-absorbing cotton 301, thereby achieving the effect of noise reduction.

[0028] Referring to Figures 2 and 3, according to the above-described embodiment of the utility model, the sum of the areas of the plurality of sound guide holes 311 on the motherboard 31 is 58% to 68% of the area of ​​the motherboard 31. In this embodiment, it is preferably 61.6%. While ensuring the overall mechanical strength of the motherboard 31, the weight of the motherboard 31 is reduced, and the sound waves are guided into the sound-absorbing cotton 301 to the maximum extent.

[0029] Referring to Figures 2 and 3, according to the above-described embodiment of the utility model, the upper end of the main board 31 is bent upward to form a first clamping plate 35, and the upper end of the first clamping plate 35 is bent laterally to form a first fixing plate 32; the left and right sides of the main board 31 are bent upward to form a second clamping plate 36 and a third clamping plate 37, respectively; the lower end of the main board 31 is bent upward to form a second fixing plate 33, and the two sides of the second fixing plate 33 extend outward to form snap-fit ​​portions 331, which snap-fit ​​with the rear side wall of the housing 1; a limiting groove for the sound-absorbing cotton 301 is formed between the first clamping plate 35, the second clamping plate 36, the third clamping plate 37, and the second fixing plate 33. This structure can reliably limit the sound-absorbing cotton 301 on the main board 31, improve the installation accuracy of the sound-absorbing cotton 301, avoid misalignment of the sound-absorbing cotton 301 affecting the sound absorption effect, and improve the overall mechanical strength by bending the main board 31 at multiple angles in multiple parts.

[0030] Referring to Figures 2 and 3, according to the above-described embodiment of the utility model, a reinforcing rib 39 is provided between the first clamping plate 35 and the first fixing plate 32. The length of the reinforcing rib 39 is less than the length of the first clamping plate 35. The reinforcing rib 39 is a stamped groove. This local stamping can maximize the reinforcing effect, is easy to process, and greatly improves the mechanical strength between the first clamping plate 35 and the first fixing plate 32, preventing deformation between them from affecting assembly accuracy and causing vibration. One end of the first fixing plate 32 is connected to the first clamping plate 35, and the other end of the first fixing plate 32 is provided with a reinforcing flange 322. The reinforcing flange 322 improves the overall strength of the first fixing plate 32 and ensures the fit between the first fixing plate 32 and the top wall of the housing, thereby improving assembly accuracy. The first fixing plate 32 is provided with screw holes 321, and is connected and fixed to the top wall of the housing by screws.

[0031] Referring to Figures 2 and 3, according to the above-described embodiment of the utility model, the first clamping plate 35, the second clamping plate 36, and the third clamping plate 37 are all provided with limiting buckles 38. The upper end of the second fixing plate 33 is bent and extended inward toward the main plate 31 to form a pressing plate 34. The limiting buckles 38 and the pressing plate 34 are respectively pressed against the edge above the sound-absorbing cotton 301. A buckle window 351 is formed on the first clamping plate 35, and the limiting buckles 38 on the first clamping plate 35 are located inside the buckle window 351. Before the sound-absorbing cotton 301 is installed, the limiting buckles 38 on the first clamping plate 35, the second clamping plate 36, and the third clamping plate 37 are on the same plane as the clamping plate to which they are connected. After the sound-absorbing cotton 301 is installed in the limiting groove of the sound-absorbing cotton 301, the limiting buckles 38 are bent so that they press against the edge of the sound-absorbing cotton 301, thereby locking and limiting the sound-absorbing cotton 301.

[0032] Referring to Figures 2 and 3, according to the above-described embodiment of the utility model, the main board 31, the first fixing plate 32, the second fixing plate 33, the snap-fit ​​part 331, the first clamping plate 35, the first clamping plate 35, the third clamping plate 37, the limiting buckle 38, and the clamping plate 34 are integrally formed. The structure is simple, easy to process, has low production cost, and is easy to assemble.

[0033] Referring to Figures 1 to 4, according to the above-described embodiment of the utility model, the angle between the first clamping plate 35 and the main board 31 is a right angle; the first fixing plate 32 is parallel to the top plate 16 of the housing 1; the second fixing plate 33 is parallel to the rear side plate 14 of the housing 1; the angle between the second fixing plate 33 and the main board 31 is an acute angle; and the angle between the plane of the first fixing plate 32 and the main board 31 is an acute angle. The angles between the first clamping plate 35 and the main board 31 are all right angles, and the clamping plate 34 is parallel to the main board 31. This ensures the installation accuracy of the noise reduction guide plate 3 and improves the assembly efficiency of the product.

[0034] Referring to Figures 1 to 4, according to the above-described embodiment of the utility model, the length of the first clamping plate 35 is less than the length of the upper side of the main board 31, the length of the second clamping plate 36 is less than the length of the left side of the main board 31, and the length of the third clamping plate 37 is less than the length of the right side of the main board 31. The shorter clamping plates can both limit the movement and reduce the weight of the noise reduction guide plate 3.

[0035] Referring to Figures 1 and 5, according to the above-described embodiment of the utility model, the housing 1 includes a cylindrical structure formed by a front panel 11, a left side panel 12, a right side panel 13, and a rear side panel 14, as well as a top plate 16 at the upper end of the cylindrical structure and a bottom plate 17 at the lower end of the cylindrical structure. The front panel 11, the left side panel 12, and the right side panel 13 are integrally formed. The rear edge of the left side panel 12 and the right side panel 13 is provided with a connecting plate 15 parallel to the rear side panel 14. The rear side panel 14 is connected to the connecting plate 15, and a snap-fit ​​gap is formed between the connecting plate 15 and the rear side panel 14. The snap-fit ​​portions 331 on both sides of the second fixing plate 33 are located in the snap-fit ​​gap. During installation, the snap-fit ​​parts 331 on both sides of the second fixing plate 33 are pressed against the connecting plate 15, and then the rear side plate 14 in the housing 1 is installed. Alternatively, the second fixing plate 33 can be tilted between the two connecting plates 15, and the second fixing plate 33 can be gradually straightened so that the two snap-fit ​​parts 331 on the second fixing plate 33 are respectively snapped into the snap-fit ​​gap. In summary, the lower end of the noise reduction guide plate 3 adopts this structure to fix it to the housing 1, which not only reduces the cost of screw fixing, but is also less prone to displacement and loosening than screw fixing, thus saving costs and being easy to maintain.

[0036] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A range hood equipped with a noise-reducing baffle, comprising a housing, a fan and control components disposed within the housing, a smoke collection hood disposed at the bottom of the housing, the fan being vertically disposed within the housing, the fan's smoke inlet being opposite to the rear inner wall of the housing, and a smoke guiding chamber being formed between the fan and the rear inner wall of the housing, characterized in that: The upper part of the smoke guiding chamber is inclined with a noise reduction guide plate. The upper end of the noise reduction guide plate is located above the smoke inlet and is fixedly connected to the top wall of the casing. The lower end of the noise reduction guide plate is opposite to the smoke inlet and is engaged with the rear side wall of the casing.

2. The range hood with a noise-reducing guide plate according to claim 1, characterized in that: The noise reduction guide plate includes a main board, multiple sound guide holes on the main board, sound-absorbing cotton covering the main board, a first fixing plate on the upper end of the main board and a second fixing plate on the lower end of the main board. The first fixing plate is fixedly connected to the top plate of the casing by screws, and the second fixing plate is engaged with the rear side wall of the casing.

3. The range hood with a noise-reducing guide plate according to claim 2, characterized in that: The sum of the areas of multiple sound guide holes on the motherboard is 58% to 68% of the motherboard area.

4. The range hood with a noise-reducing guide plate according to claim 2, characterized in that: The upper end of the motherboard bends upward to form a first clamping plate, and the upper end of the first clamping plate bends horizontally to form a first fixing plate; the left and right sides of the motherboard bend upward to form a second clamping plate and a third clamping plate, respectively; the lower end of the motherboard bends upward to form a second fixing plate, and the two sides of the second fixing plate extend outward to form snap-fit ​​parts, which snap-fit ​​with the rear side wall of the casing; a sound-absorbing cotton limiting groove is formed between the first clamping plate, the second clamping plate, the third clamping plate, and the second fixing plate.

5. The range hood with a noise-reducing guide plate according to claim 4, characterized in that: The first clamping plate, the second clamping plate, and the third clamping plate are all equipped with limiting buckles. The upper end of the second fixing plate is bent and extended inward toward the main plate to form a pressing plate. The limiting buckles and the pressing plate are pressed against the edge of the sound-absorbing cotton.

6. The range hood with a noise-reducing guide plate according to claim 5, characterized in that: The main board, the first fixing plate, the second fixing plate, the snap-fit ​​part, the first clamping plate, the first clamping plate, the third clamping plate, the limit buckle and the clamping plate are integrally formed.

7. The range hood with a noise-reducing guide plate according to claim 4, characterized in that: The angle between the first clamping plate and the motherboard is a right angle. The first fixing plate is parallel to the top plate of the casing. The second fixing plate is parallel to the rear side plate of the casing. The angle between the second fixing plate and the motherboard is an acute angle. The angle between the plane of the first fixing plate and the motherboard is an acute angle.

8. The range hood with a noise-reducing guide plate according to claim 4, characterized in that: The length of the first clamping plate is less than the length of the upper side of the motherboard, the length of the second clamping plate is less than the length of the left side of the motherboard, and the length of the third clamping plate is less than the length of the right side of the motherboard.

9. The range hood with a noise-reducing guide plate according to claim 4, characterized in that: A reinforcing rib is provided between the first clamping plate and the first fixing plate.

10. The range hood with a noise-reducing guide plate according to any one of claims 1-9, characterized in that: The housing includes a cylindrical structure formed by a front panel, a left side panel, a right side panel, and a rear side panel, as well as a top plate at the upper end of the cylindrical structure and a bottom plate at the lower end of the cylindrical structure. The front panel, the left side panel, and the right side panel are integrally formed. The rear edge of the left side panel and the right side panel are provided with connecting plates parallel to the rear side panel. The rear side panel is connected to the connecting plates, and a snap-fit ​​gap is formed between the connecting plates and the rear side panel. The snap-fit ​​parts on both sides of the second fixing plate are located in the snap-fit ​​gap.

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