Flow guide and noise reduction structure and kitchen electric appliance

Abstract

The utility model discloses a flow guide and noise reduction structure and a kitchen electric appliance, and relates to the technical field of kitchen electric appliances. The flow guide noise reduction structure comprises a first flow guide assembly and a second flow guide assembly, wherein the first flow guide assembly comprises a first flow guide surface; the second flow guide assembly comprises a second flow guide face, the second flow guide assembly and the first flow guide assembly are arranged in a spaced mode so that a gas channel can be formed between the first flow guide face and the second flow guide face, a plurality of receding holes are formed in the second flow guide face, each receding hole is connected with a resonant cavity shell, and a silencing cavity is formed in each resonant cavity shell. According to the flow guide noise reduction structure, noise can be effectively absorbed, the noise elimination effect is achieved, and the air volume loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a flow-guiding and noise-reducing structure and a kitchen appliance. Background Technology

[0002] With the continuous improvement of living standards and the expansion of residential areas, open kitchens with islands in the center have become increasingly popular. However, the location of the island makes it difficult to reserve a public exhaust duct and it is also inconvenient to vent cooking fumes outside the window, affecting environmental hygiene. This has provided an opportunity for the emergence of integrated island kitchen appliances.

[0003] Island-style air conditioners typically use internal circulation fans and are installed in locations such as open kitchens, where noise control is a high priority. However, the internal air ducts of existing island-style air conditioners have turbulent flow areas due to their curved design, which can easily generate noise and lead to airflow loss, affecting the user experience. Utility Model Content

[0004] The purpose of this invention is to propose a flow-guiding and noise-reducing structure and kitchen appliance that can effectively absorb noise, achieve a sound-absorbing effect, and reduce airflow loss.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A flow-guiding and noise-reduction structure, comprising:

[0007] The first flow guiding component includes a first flow guiding surface;

[0008] The second flow guiding component includes a second flow guiding surface. The second flow guiding component is spaced apart from the first flow guiding component to form a gas channel between the first flow guiding surface and the second flow guiding surface. The second flow guiding surface has multiple clearance holes, and each clearance hole is connected to a resonant cavity shell. A sound-absorbing cavity is provided inside the resonant cavity shell.

[0009] As an alternative to the above-mentioned flow-guiding and noise reduction structure, the resonant cavity shell and the corresponding clearance hole are connected by a sound guide tube, and the cross-sectional area of ​​the sound guide tube is smaller than the cross-sectional area of ​​the resonant cavity shell.

[0010] As an optional solution to the above-mentioned flow guiding and noise reduction structure, the second flow guiding component also includes a second mounting surface. Along the flow direction of the gas in the gas channel, the distance between the second mounting surface and the second flow guiding surface first increases and then decreases. Multiple resonant cavity shells are fixedly disposed on the second mounting surface, and the lengths of the multiple resonant cavity shells are not completely equal.

[0011] As an optional solution to the above-mentioned flow guiding and noise reduction structure, the second flow guiding surface includes a third flow guiding part and a fourth flow guiding part. Along the flow direction of the gas in the gas channel, the distance between the third flow guiding part and the second mounting surface gradually increases, and the distance between the fourth flow guiding part and the second mounting surface gradually decreases. A gas channel is formed between the third flow guiding part and the first flow guiding surface.

[0012] As an alternative to the above-mentioned flow guiding and noise reduction structure, along the flow direction of the gas in the gas channel, the slope of the third flow guiding part relative to the second mounting surface gradually decreases, and the slope of the fourth flow guiding part relative to the second mounting surface first increases and then decreases.

[0013] As an optional solution for the above-mentioned flow-guiding and noise-reducing structure, the first flow-guiding surface is provided with a first sound-absorbing hole, and the second flow-guiding surface is provided with a second sound-absorbing hole.

[0014] As an optional solution for the above-mentioned flow-guiding and noise-reducing structure, sound-absorbing materials are provided on both the side of the first flow-guiding surface away from the second flow-guiding surface and the side of the second flow-guiding surface away from the first flow-guiding surface.

[0015] A kitchen appliance includes a flow-guiding and noise-reducing structure, and also includes a main body. The main body includes a cavity and a flow-guiding plate. The flow-guiding plate includes a vertical plate and a horizontal plate that are set at an angle and connected to each other. A first flow-guiding component is disposed on the flow-guiding plate. Along the flow direction of gas in the gas channel, the distance between the first flow-guiding surface and the vertical plate gradually increases, and the distance between the first flow-guiding surface and the horizontal plate gradually decreases.

[0016] As an optional solution for the aforementioned kitchen appliance, the first guide surface includes a first guide portion and a second guide portion connected together. The first guide portion is convex relative to the guide plate, and the second guide portion is concave relative to the guide plate, so that the first guide surface forms a wave shape.

[0017] As an optional solution for the aforementioned kitchen appliances, the main body also includes an exhaust channel, a mounting plate, and a fan. The fan and the cavity are located on opposite sides of the mounting plate. The mounting plate has through holes, the air inlet of the fan is connected to the through holes, and the air outlet of the fan is connected to the exhaust channel.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a flow-guiding noise reduction structure. In this structure, a first flow-guiding component and a second flow-guiding component are spaced apart to form a gas channel between the first and second flow-guiding surfaces, thereby guiding the airflow and preventing airflow loss. Furthermore, the second flow-guiding surface of the second flow-guiding component has multiple clearance holes, each connected to a resonant cavity shell. When gas flows within the gas channel, it can effectively absorb noise, achieving a sound-dampening effect.

[0020] This embodiment also provides a kitchen appliance in which the first airflow guiding component is disposed at the bend of the airflow guiding plate, which can prevent the gas from becoming turbulent and backflowing at this point, thereby reducing airflow loss. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the kitchen appliance provided by this utility model;

[0022] Figure 2 This is a cross-sectional view of the kitchen appliance provided by this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the first flow guiding component provided by this utility model;

[0024] Figure 4 This is a side view of the first flow guiding component provided by this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the second flow guiding component provided by this utility model;

[0026] Figure 6 This is a side view of the second flow guiding component provided by this utility model.

[0027] In the picture:

[0028] 1. Main body; 11. Air outlet; 12. Drain plate; 121. Vertical plate; 122. Horizontal plate; 123. Arc-shaped plate; 13. Exhaust channel; 14. Mounting plate; 141. Through hole; 15. Second chamber; 16. Third chamber;

[0029] 2. Engine head; 21. Air inlet; 22. First chamber;

[0030] 3. Fan;

[0031] 4. First flow guiding component; 41. First flow guiding surface; 411. First flow guiding part; 412. Second flow guiding part; 42. First mounting surface; 43. First sound absorption hole;

[0032] 5. Second flow guide assembly; 51. Second flow guide surface; 511. Third flow guide section; 512. Fourth flow guide section; 52. Clearance hole; 53. Resonance cavity shell; 54. Sound guide tube; 55. Second mounting surface;

[0033] 6. Countertop. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0036] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] With the continuous improvement of living standards and the expansion of residential areas, open kitchens with islands in the center have become increasingly popular. However, the location of the island makes it difficult to reserve a public exhaust duct and it is also inconvenient to vent cooking fumes outside the window, affecting environmental hygiene and easily leading to indoor air pollution, which in turn affects the health of users.

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a kitchen appliance, which includes a main body 1 and a burner 2. The main body 1 can be installed on the countertop 6 of an island or a kitchen cabinet. The burner 2 is installed on the main body 1 to draw in cooking fumes. The burner 2 has an air inlet 21, and the main body 1 has an air outlet 11. A burner is installed on the countertop 6 where the kitchen appliance is installed for cooking. A negative pressure can be formed inside the burner 2, allowing cooking fumes to enter the main body 1 through the air inlet 21 and be discharged through the air outlet 11.

[0041] It's worth noting that the two types of kitchen appliances mentioned above correspond to an island-style integrated kitchen appliance and an integrated cooktop, respectively. Both are located below the countertop (6), making full use of the space. The island-style integrated kitchen appliance has its exhaust vent (11) located on the main body (1), and the fumes are purified by the purification structure within the main body (1) before being discharged into the room. The integrated cooktop has its exhaust vent (11) located on the main body (1), and this vent connects to a common flue or leads to the outside, allowing fumes to be discharged outside the kitchen.

[0042] In this embodiment, the kitchen appliance is described using an island-style integrated appliance as an example. The negative pressure of the head unit 2 is generated by the fan 3 installed in the main body 1. The main body 1 also includes a diversion plate 12, which includes a vertical plate 121 and a horizontal plate 122 that are set at an angle and connected to each other. The vertical plate 121 and the horizontal plate 122 are connected by an arc plate 123. A cavity is provided inside the main body 1. After the oil fumes enter the cavity from the head unit 2, the diversion plate 12 can divert the oil fumes to the air inlet of the fan 3, and after passing through the fan 3, they are discharged from the air outlet of the fan 3 and the air outlet 11 of the main body 1.

[0043] Since the air outlet 11 discharges gas into the room, to avoid affecting the user's cooking, the air outlet 11 is located at the rear of the unit head 2, so that the gas discharged from the air outlet 11 can be blocked by the unit head 2. Figure 1 and Figure 2 As shown, to achieve the above structure, the main body 1 also includes an exhaust channel 13. The exhaust channel 13 is L-shaped. One end of the exhaust channel 13 is located inside the main body 1 and is connected to the air outlet of the fan 3. The other end of the exhaust channel 13 extends upward and is located at the rear side of the head 2. The air outlet 11 is located at the end of the exhaust channel 13 located at the rear side of the head 2.

[0044] To simplify the structure, the deflector plate 12 is the side wall of the exhaust channel 13. That is to say, after passing through the head 2, the fumes flow along one side of the deflector plate 12, and after passing through the fan 3, they flow in the opposite direction on the other side of the deflector plate 12 to be discharged from the outlet 11.

[0045] In this embodiment, the main body 1 also includes a mounting plate 14. The fan 3 and the cavity are located on opposite sides of the mounting plate 14. The mounting plate 14 has a through hole 141. The fan 3 is a centrifugal fan 3, and the air inlet of the fan 3 communicates with the through hole 141. The mounting plate 14 is used to fix the fan 3 and can also divide the interior of the main body 1 to form a cavity. By reducing the volume of the cavity, the negative pressure generated by the fan 3 is increased, thereby improving the ability of the air inlet 21 to adsorb oil fumes.

[0046] like Figure 2 As shown, for ease of description, in this kitchen appliance, the space inside the head unit 2 is referred to as the first cavity 22, while the cavities inside the main body 1 are divided into a second cavity 15 and a third cavity 16. The second cavity 15 is the space covered vertically by the opening connecting the main body 1 and the head unit 2, while the remaining space within the cavity is referred to as the third cavity 16. The fumes drawn in by the head unit 2 pass sequentially through the first cavity 22, the second cavity 15, and the third cavity 16.

[0047] This necessitates a 90° change in the direction of the oil fume flow, which can easily cause turbulence and backflow at the curved plate 123, generating noise and reducing airflow, thus impacting the user experience. Figures 2-6 As shown, to solve the above problems, this embodiment provides a flow-guiding and noise-reducing structure, which includes a first flow-guiding component 4 and a second flow-guiding component 5. The first flow-guiding component 4 includes a first flow-guiding surface 41, and the second flow-guiding component 5 includes a second flow-guiding surface 51. The second flow-guiding component 5 and the first flow-guiding component 4 are spaced apart to form a gas channel between the first flow-guiding surface 41 and the second flow-guiding surface 51. The second flow-guiding surface 51 has a plurality of clearance holes 52, and each clearance hole 52 is connected to a resonant cavity shell 53. A sound-absorbing cavity is provided inside the resonant cavity shell 53.

[0048] The airflow guiding and noise reduction structure is installed inside the main body 1. The first airflow guiding component 4 and the second airflow guiding component 5 are spaced apart to form a gas channel between the first airflow guiding surface 41 and the second airflow guiding surface 51, thereby guiding the airflow and avoiding airflow loss. Furthermore, the second airflow guiding surface 51 of the second airflow guiding component 5 has multiple clearance holes 52, each of which is connected to a resonant cavity shell 53. When gas flows within the gas channel, it can effectively absorb noise, achieving a sound attenuation effect.

[0049] Furthermore, the first flow guiding component 4 is disposed on the flow guiding plate 12. Along the gas flow direction in the gas channel, the distance between the first flow guiding surface 41 and the vertical plate 121 gradually increases, while the distance between the first flow guiding surface 41 and the horizontal plate 122 gradually decreases. When the gas flows along the first flow guiding surface 41 of the first flow guiding component 4, the angle at which the gas flow direction changes is much less than 90°. Therefore, within the range of the flow guiding plate 12, the gas is unlikely to generate turbulence or backflow, which can reduce both noise and airflow loss.

[0050] Structurally, most of the first flow guiding component 4 is located within the second cavity 15. The first flow guiding component 4 also includes a first mounting surface 42, which is attached to the flow guiding surface. Therefore, the first mounting surface 42 is also approximately L-shaped. The first flow guiding surface 41 includes a first flow guiding part 411 and a second flow guiding part 412 connected to each other. The first flow guiding part 411 is convex relative to the flow guiding plate 12, and the second flow guiding part 412 is concave relative to the flow guiding plate 12, so that the first flow guiding surface 41 forms a wave shape.

[0051] In this configuration, if the vertical portion of the first mounting surface 42 is taken as the reference surface, the first guide surface 41 is located in front of the reference surface. The upward convex configuration means that the slope of the first guide portion 411 relative to the reference surface gradually decreases along the downward direction. That is, the arc center of the first guide portion 411 is located on the side of the first guide portion 411 facing the first reference surface. This structure can quickly reduce the cross-sectional area of ​​the gas channel, thereby increasing the flow velocity of the gas through the gas channel, increasing the negative pressure at the air inlet 21, and improving the ability to adsorb oil fumes. The downward concave configuration means that the slope of the second guide portion 412 relative to the reference surface gradually increases along the downward direction. That is, the arc center of the second guide portion 412 is located on the side of the second guide portion 412 away from the first reference surface. This structure can change the flow direction of the gas to approximately horizontal, thereby avoiding a significant reduction in gas velocity or the generation of turbulence and backflow during gas flow. This can reduce noise and reduce air volume loss.

[0052] like Figure 4 As shown, the maximum distance between the first guide section 411 and the reference plane is L1, and the width L1 is 40% to 50% of the gas channel's dimension in the front-to-back direction. This ensures that the gas channel's size is within a suitable range, guaranteeing both airflow and sufficient negative pressure. In this embodiment, L1 can be 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, or 50% of the gas channel's dimension in the front-to-back direction.

[0053] The vertical dimension of the first guide section 411 is H1, and H1 is 40% to 50% of the vertical dimension of the second cavity 15. Since the second guide section 412 is the main component that changes the gas flow direction, the height of the first guide section 411 should not be too high to leave sufficient space for the second guide section 412. In this embodiment, H1 can be 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, or 50% of the vertical dimension of the second cavity 15.

[0054] The second guide section 412 has point A, which is located at the front end of the opening connecting the main body 1 and the head 2 in the vertical direction. The vertical dimension H2 of the portion of the second guide section 412 located in front of point A is 20% to 30% of the vertical dimension of the second cavity 15. The longitudinal dimension L3 of the portion of the second guide section 412 located in front of point A is smaller than the longitudinal dimension of the gas channel to ensure that this portion of the second guide section 412 is not too flat, thus avoiding turbulence and backflow. In this embodiment, H2 can be 20%, 21%, 22%, 23%, 22%, 25%, 26%, 27%, 28%, 29%, or 30% of the vertical dimension of the second cavity 15.

[0055] like Figure 3 As shown, in order to improve the noise elimination effect of the first flow guiding component 4, the first flow guiding surface 41 is provided with a first sound-absorbing hole 43. When the gas passes through the gas channel, the first sound-absorbing hole 43 can absorb part of the noise.

[0056] Furthermore, a sound-absorbing material is provided on the side of the first guide surface 41 that is away from the second guide surface 51. That is, the sound-absorbing material is provided between the first guide surface 41 and the first mounting surface 42. The noise absorbed by the first sound-absorbing hole 43 will be consumed by the sound-absorbing material, thereby improving the noise.

[0057] It is worth noting that the sound-absorbing material is sound-absorbing cotton, whose surface typically has a porous structure. These pores allow sound waves to enter the cotton and undergo multiple reflections, increasing the contact area between the sound waves and the cotton material and improving sound absorption. Simultaneously, the fibrous material inside the cotton dampens the sound waves, converting their energy into a small amount of heat, thereby reducing sound wave propagation.

[0058] like Figure 2 , Figure 5 and Figure 6 As shown, the second flow guiding component 5 is disposed in the third cavity 16. The second flow guiding component 5 achieves noise reduction by setting a resonant cavity shell 53. To improve the noise reduction effect, the resonant cavity shell 53 and the corresponding clearance hole 52 are connected by a sound guide tube 54. The cross-sectional area of ​​the sound guide tube 54 is smaller than that of the resonant cavity shell 53. After the noise vibration passes through the sound guide tube 54, it enters the larger diameter noise reduction cavity, which disperses the vibration energy and reduces the noise.

[0059] Furthermore, the lengths of the multiple resonant cavity shells 53 are not exactly equal, that is, the sizes of the multiple resonant cavity shells 53 are not exactly the same, thereby achieving effective absorption of broadband noise, which can reduce low-frequency noise and absorb high-frequency noise, providing comprehensive noise control, while also avoiding excessive resonance at a specific frequency, thereby reducing noise enhancement.

[0060] like Figure 5 and Figure 6 As shown, to ensure the stability of the multiple resonant cavity shells 53, the second flow guiding assembly 5 also includes a second mounting surface 55. Along the gas flow direction in the gas channel, the distance between the second mounting surface 55 and the second flow guiding surface 51 first increases and then decreases. The multiple resonant cavity shells 53 are fixedly disposed on the second mounting surface 55. The second mounting surface 55 is a plane and is used to fix the second flow guiding assembly 5 to the lower side of the top surface of the main body 1. Therefore, the multiple resonant cavity shells 53 can be stably fixed on the second mounting surface 55, and the length of the resonant cavity shell 53 depends on the vertical distance between the second mounting surface 55 and the second flow guiding surface 51 at that position. At the same time, the resonant cavity shell 53 can support the second flow guiding surface 51.

[0061] For ease of description, the second guide surface 51 is divided into two parts: the third guide section 511 and the fourth guide section 512. Along the flow direction of the gas in the gas channel, the distance between the third guide section 511 and the second mounting surface 55 gradually increases, and the distance between the fourth guide section 512 and the second mounting surface 55 gradually decreases. A gas channel is formed between the third guide section 511 and the first guide surface 41.

[0062] The third guide section 511 serves as another guide wall for the gas passage. The distance between the third guide section 511 and the second mounting surface 55 gradually increases, allowing the third guide section 511 to have an inclination approximately the same as the first guide surface 41. This ensures that the dimensions of the gas passage remain largely unchanged in the front-to-back direction, providing a stable path for gas flow. It is worth noting that due to the rotation of the impeller of the fan 3, the gas also flows along the outer periphery of the through hole 141 before passing through it. The distance between the fourth guide section 512 and the second mounting surface 55 gradually decreases, thus providing sufficient space near the through hole 141 of the mounting plate 14 to prevent the gas from being blocked and affecting the airflow when flowing around the through hole 141.

[0063] Furthermore, along the gas flow direction within the gas channel, the slope of the third guide section 511 relative to the second mounting surface 55 gradually decreases, while the slope of the fourth guide section 512 relative to the second mounting surface 55 first increases and then decreases.

[0064] The arc center of the third guide section 511 is located on the side of the third guide section 511 facing the second mounting surface 55, so that the third guide section 511 can adapt to the second guide section 412, ensuring the smoothness and stability of the gas passage. The fourth guide section 512 is equivalent to having two arcs. One arc is connected to the third guide section 511, and the arc center of this arc is located on the side of the fourth guide section 512 facing the second mounting surface 55, while the arc center of the other arc is located on the side of the fourth guide section 512 away from the second mounting surface 55, so that the fourth guide section 512 can adapt to the flow path of the gas flowing along the outer periphery of the through hole 141, which can both avoid the gas and play a certain guiding role.

[0065] Specifically, the maximum dimension of the second flow guide component 5 in the front-to-back direction is L2, which is also the dimension of the second mounting surface 55 in the front-to-back direction. L2 is greater than 50% of the dimension of the third cavity 16 in the front-to-back direction. The maximum dimension of the second flow guide component 5 in the vertical direction is H3, which is also the dimension of the third flow guide part 511 and the fourth flow guide part 512 in the vertical direction. H3 is twice the dimension between the second flow guide component 5 and the horizontal plate 122 in the vertical direction, so as to ensure that the second flow guide component 5 can occupy as much space as possible in the third cavity 16, thereby reducing the amount of wasted space and avoiding airflow loss.

[0066] The third guide section 511 has a dimension L4 in the front-to-back direction, and L4 is 25% to 35% of the dimension of the third cavity 16 in the front-to-back direction. In this embodiment, L4 can be 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, or 35% of the dimension of the third cavity 16 in the front-to-back direction.

[0067] In order to improve the noise elimination effect of the second flow guiding component 5, the second flow guiding surface 51 is provided with a second sound absorbing hole, and the diameter of the second sound absorbing hole is larger than the diameter of the clearance hole 52, so that sound can enter and achieve absorption of high frequency noise.

[0068] Furthermore, a sound-absorbing material is provided on the side of the second guide surface 51 that is away from the first guide surface 41. That is, the sound-absorbing material is placed between the second guide surface 51 and the second mounting surface 55. The noise absorbed by the second sound-absorbing hole will be consumed by the sound-absorbing material, thereby improving the noise.

[0069] In this embodiment, the sound-absorbing material is sound-absorbing cotton, and the sound-absorbing cotton fills the gaps between the multiple resonant cavity shells 53.

[0070] In this embodiment, along the left-right direction, the first flow guiding component 4 fills the second cavity 15, and the second flow guiding component 5 fills the third cavity 16, so as to ensure that the gas entering from the air inlet 21 can only pass through the gas channel and avoid air volume loss.

[0071] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A flow-guiding and noise-reducing structure, characterized in that, include: The first flow guiding component (4) includes a first flow guiding surface (41); The second flow guiding component (5) includes a second flow guiding surface (51). The second flow guiding component (5) and the first flow guiding component (4) are spaced apart to form a gas channel between the first flow guiding surface (41) and the second flow guiding surface (51). The second flow guiding surface (51) is provided with a plurality of clearance holes (52). Each clearance hole (52) is connected to a resonant cavity shell (53). A sound-absorbing cavity is provided inside the resonant cavity shell (53).

2. The flow-guiding and noise-reducing structure according to claim 1, characterized in that, The resonant cavity shell (53) is connected to the corresponding clearance hole (52) via a sound guide tube (54), the cross-sectional area of ​​which is smaller than that of the resonant cavity shell (53).

3. The flow-guiding and noise-reducing structure according to claim 1, characterized in that, The second flow guiding component (5) also includes a second mounting surface (55). Along the flow direction of the gas in the gas channel, the distance between the second mounting surface (55) and the second flow guiding surface (51) first increases and then decreases. A plurality of resonant cavity shells (53) are fixedly disposed on the second mounting surface (55), and the lengths of the plurality of resonant cavity shells (53) are not completely equal.

4. The flow-guiding and noise-reducing structure according to claim 3, characterized in that, The second guide surface (51) includes a third guide portion (511) and a fourth guide portion (512). Along the flow direction of the gas in the gas channel, the distance between the third guide portion (511) and the second mounting surface (55) gradually increases, and the distance between the fourth guide portion (512) and the second mounting surface (55) gradually decreases. The gas channel is formed between the third guide portion (511) and the first guide surface (41).

5. The flow-guiding and noise-reducing structure according to claim 4, characterized in that, Along the gas flow direction in the gas channel, the slope of the third guide section (511) relative to the second mounting surface (55) gradually decreases, and the slope of the fourth guide section (512) relative to the second mounting surface (55) first increases and then decreases.

6. The flow-guiding and noise-reducing structure according to claim 1, characterized in that, The first guide surface (41) has a first sound-absorbing hole (43), and the second guide surface (51) has a second sound-absorbing hole.

7. The flow-guiding and noise-reducing structure according to claim 6, characterized in that, Sound-absorbing material is provided on the side of the first guide surface (41) away from the second guide surface (51) and on the side of the second guide surface (51) away from the first guide surface (41).

8. A kitchen appliance, characterized in that, The flow-guiding and noise-reducing structure according to any one of claims 1 to 7 further includes a main body (1), the main body (1) including a cavity and a flow-guiding plate (12), the flow-guiding plate (12) including a vertical plate (121) and a horizontal plate (122) arranged at an angle and connected to each other, the first flow-guiding component (4) is disposed on the flow-guiding plate (12), and along the flow direction of the gas in the gas channel, the distance between the first flow-guiding surface (41) and the vertical plate (121) gradually increases, and the distance between the first flow-guiding surface (41) and the horizontal plate (122) gradually decreases.

9. The kitchen appliance according to claim 8, characterized in that, The first guide surface (41) includes a first guide portion (411) and a second guide portion (412) connected to each other. The first guide portion (411) is convex relative to the guide plate (12), and the second guide portion (412) is concave relative to the guide plate (12), so that the first guide surface (41) forms a wave shape.

10. The kitchen appliance according to claim 8, characterized in that, The main body (1) also includes an exhaust channel (13), a mounting plate (14) and a fan (3). The fan (3) and the cavity are located on opposite sides of the mounting plate (14). The mounting plate (14) is provided with a through hole (141). The air inlet of the fan (3) is connected to the through hole (141), and the air outlet of the fan (3) is connected to the exhaust channel (13).

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