Range hood

Abstract

The application discloses a range hood, a plurality of first protruding structures are arranged on the bottom plate of the cabinet, the first protruding structures are located on the surface of the bottom plate facing the fan and protrude towards the fan. In this way, after the airflow enters the inside of the cabinet from the flue, the first protruding structures can guide part of the airflow, guide the airflow into the smoke suction port of the fan, and improve the oil fume exhaust efficiency of the range hood. Meanwhile, the first protruding structures can also play the reinforcing role of the reinforcing ribs, thereby improving the structural strength of the bottom plate. Since the main body part is connected to the bottom plate, the main body part is more stable and is less affected by vibration. During the working process of the range hood, the influence of the vibration caused by the fan on the bottom plate and the main body part is reduced, and the noise generated by the cabinet due to the influence of the fan can be reduced. Moreover, due to the flow guiding effect of the first protruding structures, the turbulence of the airflow in the cabinet can be reduced, and then the vibration and noise caused by the airflow turbulence can be reduced.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] A range hood is a device that can quickly exhaust cooking fumes or odors to the outside through airflow, thereby purifying the kitchen environment, improving the user's cooking experience, maintaining the user's health, and keeping the kitchen clean and hygienic.

[0003] During operation, the range hood generates vibrations due to the fan's operation. These vibrations are transmitted to the frame and volute, causing them to vibrate under the influence of the fan, thus producing significant noise. Furthermore, the airflow created within the range hood's frame and smoke hood to extract cooking fumes also generates noise due to its own movement and vibration, negatively impacting the user experience. Utility Model Content

[0004] The range hood provided in this application can reduce the vibration and noise generated during operation, thereby improving the user experience.

[0005] This application provides a range hood, comprising:

[0006] The housing has a receiving cavity;

[0007] A fan is disposed in the housing and located in the receiving cavity, and the fan has a smoke inlet that communicates with the receiving cavity;

[0008] A smoke collection hood is provided below the housing in the height direction of the housing. The smoke collection hood has a flue and a smoke inlet. One end of the flue is connected to the receiving cavity, and the other end of the flue is connected to the smoke inlet.

[0009] The enclosure includes:

[0010] The main body is cylindrical and forms the receiving cavity. The main body has a first opening and a second opening arranged opposite to each other in the height direction of the box.

[0011] A top plate is connected to the upper side of the main body along the height direction of the box, and the top plate covers the first opening;

[0012] A base plate is connected to the lower side of the main body along the height direction of the housing, and the base plate covers a portion of the second opening to form an air inlet with the main body. The air inlet communicates with the receiving cavity so that the flue communicates with the receiving cavity.

[0013] The base plate has a plurality of first protrusions on the surface facing the fan, which are used to guide airflow into the smoke inlet.

[0014] The range hood of this application features a first protruding structure on the bottom plate of the housing containing the fan. This first protruding structure is located on the surface of the bottom plate facing the fan and protrudes towards it. Thus, when airflow enters the housing from the flue, the multiple first protruding structures can guide a portion of the airflow, directing it towards the fan's intake port, improving the efficiency of airflow exhaust to the outside, thereby increasing the range hood's smoke extraction efficiency. Simultaneously, the first protruding structure acts as a reinforcing rib, increasing the structural strength of the bottom plate. Since the main body is connected to the bottom plate, it is more stable and less susceptible to vibration. During operation, the impact of fan-induced vibration on the bottom plate and main body is reduced, decreasing noise generated by the fan within the housing. Furthermore, the multiple first protruding structures guide airflow into the fan's intake port. Moreover, the guiding effect of the first protruding structures reduces airflow turbulence within the housing, further reducing vibration and noise caused by airflow disturbance.

[0015] In one possible implementation, the opening of the smoking port faces the front side of the housing, and a plurality of the first protrusions extend from the rear side of the housing toward the front side of the housing, and the plurality of the first protrusions are spaced apart in a direction perpendicular to their extension direction.

[0016] The fan's smoke inlet faces the front of the housing. The first protruding structure extends from the rear to the front of the housing, and multiple first protruding structures are spaced apart in a direction perpendicular to their extension direction. In this way, multiple first protruding structures can form multiple air ducts. When airflow enters the housing from the smoke hood through the air inlet, these air ducts guide part of the airflow. Because the direction of the smoke inlet is consistent with the extension direction of the first protruding structure, the number of turns the airflow makes inside the housing is reduced. This allows the airflow to flow along the air ducts and towards the fan's smoke inlet, enabling the airflow to enter the smoke inlet quickly and accurately, and then be exhausted outdoors by the fan. This improves the smoke extraction efficiency of the range hood and reduces the impact of airflow on the housing, thereby reducing the noise of the range hood during operation.

[0017] In one possible implementation, at least a portion of the first protrusions extend obliquely in the direction from the rear side of the housing toward the front side of the housing, such that the distance between the ends of the plurality of first protrusions near the front side of the housing is less than the distance between the ends of the plurality of first protrusions away from the rear side of the housing.

[0018] By making the distance between at least some of the first protruding structures near the front side of the housing smaller than the distance between the ends of these first protruding structures near the rear side of the housing, the airflow, while flowing towards the front of the housing through these first protruding structures, can also converge and concentrate to form a confluence, thereby accurately introducing the airflow into the fan's smoke inlet and further improving the range hood's smoke extraction efficiency.

[0019] In one possible implementation, a plurality of the first protrusion structures are arranged in a fan shape.

[0020] Multiple first protrusions are arranged in a fan shape. This allows the multiple air ducts formed by the protrusions to concentrate and guide airflow to the fan's intake. Simultaneously, the fan-shaped arrangement of the protrusions, while concentrating and guiding the airflow, also ensures a relatively balanced airflow distribution, reducing noise caused by airflow turbulence and preventing localized high pressure within the enclosure.

[0021] In one possible implementation, the base plate has a recess on the surface away from the fan, so that the base plate forms the first protrusion structure on the surface facing the fan. In the thickness direction of the base plate, the depth of the recess is D, and D satisfies the relationship: 2mm≤D≤4mm.

[0022] By creating a recess on the surface of the base plate facing away from the fan, a first protruding structure is formed on the surface of the base plate facing the fan. In other words, the first protruding structure is integrally molded with the base plate. This allows for improved structural strength of the base plate through a molding zone, reducing the impact of vibration on the base plate and avoiding increased weight, thus contributing to a lightweight design for the range hood. Simultaneously, by appropriately setting the depth of the recess, the structural strength of the base plate is improved while ensuring the first protruding structure has sufficient height to guide airflow, preventing the base plate from being too thin. When D < 2mm, the recess depth is too small, resulting in a small first protruding structure that cannot effectively guide airflow. When D > 4mm, the recess depth is too large, causing the base plate to become too thin in the portion corresponding to the recess, making it prone to deformation.

[0023] In one possible implementation, the first protrusion structure is a plate, which is fixedly connected to the base plate.

[0024] The first protruding structure can also be a separate plate, which is fixedly connected to the base plate. In this way, these plates can not only act as reinforcing ribs to improve the overall structural strength of the base plate, but also guide airflow, helping to adjust the airflow inside the housing, reduce vibration caused by airflow, and improve the airflow efficiency towards the fan's smoke inlet, thereby improving the range hood's smoke extraction efficiency.

[0025] In one possible implementation, at least a portion of the plate is provided with a plurality of noise reduction holes, which penetrate the plate along its thickness direction.

[0026] These panels are at least partially equipped with noise reduction holes. In this way, during the operation of the range hood, some of the noise sound waves propagate into the noise reduction holes, are reflected and remain in the noise reduction holes, and some of the sound waves do work on the panels, which can also consume some of the noise energy, thereby reducing the noise propagated outward by the range hood.

[0027] In one possible implementation, in the direction from the rear side of the box to the front side of the box, the bottom plate extends obliquely upward along the height direction of the box, and the angle between the extension direction of the bottom plate and the depth direction of the box is α, and α satisfies the relationship: 6°≤α≤20°.

[0028] On the rear side of the housing, facing forward, the bottom plate extends upwards along the height of the housing, with the angle α between the bottom plate and the depth direction of the housing satisfying the relationship: 6°≤α≤20°. Within this range, when airflow enters the receiving cavity, the bottom plate can guide part of the airflow upwards to the fan, allowing this part of the airflow to enter the fan's smoke inlet. Simultaneously, it ensures that the receiving cavity formed by the housing has sufficient space to house the fan. When α < 6°, the inclination angle of the bottom plate is small, and its guiding effect on airflow is weak. When α > 20°, the inclination angle of the bottom plate is too large, and the space in the receiving cavity formed by the housing is insufficient to house the fan. The only way to accommodate the fan is to increase the volume of the housing, which is detrimental to the miniaturization and lightweight design of the range hood.

[0029] In one possible implementation, the main body includes:

[0030] Front panel, the front panel being connected between the top panel and the bottom panel.

[0031] A back panel, which is connected to the top panel, is arranged opposite to the front panel in the depth direction of the housing, and is also connected to the smoke collection hood;

[0032] The left plate is connected between the front plate and the back plate, and between the top plate and the bottom plate. The left plate is also connected to the smoke collection hood.

[0033] The right panel is connected between the front panel and the back panel, and between the top panel and the bottom panel. In the width direction of the housing, the left panel is arranged opposite to the right panel, and the right panel is also connected to the smoke hood.

[0034] At least one of the front plate, the back plate, the left plate, and the right plate is provided with a plurality of second protrusion structures protruding toward the fan. The second protrusion structures extend along the height direction of the housing and are arranged at intervals along the width direction of the housing.

[0035] By incorporating a second protruding structure facing the fan on other plates constituting the main body, the overall structural strength of the housing can be improved, thereby reducing the impact of vibration on the housing. The housing can also better prevent sound wave propagation, thus reducing the noise generated by the range hood during operation. Simultaneously, since the second protruding structure extends along the height of the housing, when airflow enters the cavity from the air inlet, the second protruding structure can also guide the airflow upwards to the fan, reducing airflow turbulence and improving the range hood's smoke extraction efficiency.

[0036] In one possible implementation, the smoke hood is provided with a smoke outlet that connects to the flue. In the width direction of the housing, the left and right plates are respectively connected to the smoke hood on opposite sides to allow the air inlet to communicate with the smoke outlet. The sides of the left and right plates opposite to the front plate are also fixedly connected to the rear side of the smoke hood. In the width direction of the housing, the connection positions of the left and right plates to the rear side of the smoke hood are located between the two sides of the smoke hood that form the smoke outlet in the width direction of the housing.

[0037] The fume hood has a smoke outlet connected to the flue. The smoke outlet is connected to the opposite sides of the left and right panels, allowing the air inlet to communicate with the outlet. At this point, the fume hood applies force to the left and right panels in the width direction of the housing, causing them to shift away from each other. When the back panel is connected to the left and right panels, gaps may appear between the back panel and the left panel, and / or between the back panel and the right panel, due to the shift, leading to oil leakage. Therefore, the left and right panels are also fixedly connected to the rear side of the fume hood on the side opposite to the front panel in the depth direction of the housing. Furthermore, the connection points of the left and right panels to the rear side of the fume hood are located between the two sides of the fume hood forming the smoke outlet in the width direction of the housing. This allows the left and right panels, after being fixed to the rear side of the fume hood on the side opposite to the front panel, to shift closer together under the action of the fume hood, reducing or eliminating gaps between them and the back panel, thereby reducing or preventing oil leakage. Simultaneously, the reduced or eliminated gaps between the left and right panels and the back panel improve the sealing of the cavity, better preventing noise transmission to the outside of the housing and reducing noise. Moreover, the tighter edge connection of the left, right, and back panels increases their stability, making them less susceptible to vibration and further reducing noise.

[0038] Compared with the prior art, the beneficial effects of this application are as follows:

[0039] The range hood of this application features a first protruding structure on the bottom plate of the housing containing the fan. This first protruding structure is located on the surface of the bottom plate facing the fan and protrudes towards it. Thus, when airflow enters the housing from the flue, the multiple first protruding structures can guide a portion of the airflow, directing it towards the fan's intake port, improving the efficiency of airflow exhaust to the outside, thereby increasing the range hood's smoke extraction efficiency. Simultaneously, the first protruding structure acts as a reinforcing rib, increasing the structural strength of the bottom plate. Since the main body is connected to the bottom plate, it is more stable and less susceptible to vibration. During operation, the impact of fan-induced vibration on the bottom plate and main body is reduced, decreasing noise generated by the fan within the housing. Furthermore, the multiple first protruding structures guide airflow into the fan's intake port. Moreover, the guiding effect of the first protruding structures reduces airflow turbulence within the housing, further reducing vibration and noise caused by airflow disturbance. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the range hood in the embodiments of this application;

[0041] Figure 2 yes Figure 1 The diagram shown is a front view of the range hood.

[0042] Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the range hood along the B-B' direction;

[0043] Figure 4 yes Figure 1 An exploded view of the range hood housing shown;

[0044] Figure 5 yes Figure 1 The diagram shows a side view of the range hood's casing.

[0045] Figure 6 yes Figure 3 Enlarged view of region C in the middle;

[0046] Figure 7 This is a schematic diagram of the connection between the back plate and the smoke hood in this embodiment;

[0047] Figure 8 This is a schematic diagram of the structure of the base plate in one embodiment of this application;

[0048] Figure 9 yes Figure 8 A top view of the base plate shown;

[0049] Figure 10 This is a schematic diagram of another structure of the base plate in an embodiment of this application;

[0050] Figure 11 yes Figure 9 The diagram shows a cross-sectional view of the base plate along the D-D' direction;

[0051] Figure 12 yes Figure 11 Enlarged schematic diagram of region F in the middle;

[0052] Figure 13 yes Figure 9 The diagram shows a cross-sectional view of the base plate along the E-E' direction;

[0053] Figure 14 This is a schematic diagram of the structure of a range hood with a decorative cover in an embodiment of this application;

[0054] Figure 15 yes Figure 14 The diagram shows the structure of the decorative cover.

[0055] Figure 16 yes Figure 1 An enlarged schematic diagram of region A in the middle.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1. Range hood; 11. Housing; 11a. Receiving cavity; 111. Main body; 111a. First opening; 111b. Second opening; 111c. Air inlet; 1111. Front panel; 1112. Back panel; 1113. Left panel; 1114. Right panel; 1115. Second protruding structure; 112. Top panel; 113. Bottom panel; 113a. Recess; 1131. First protruding structure; 12. Fan; 12a. Smoke inlet; 13. Smoke hood; 13a. Smoke duct; 13b. Smoke inlet; 13c. Slot; 131. Connecting part; 132. Rear panel; 14. Decorative cover; 141. Front panel; 1411. Buckle; 142. Left side panel; 143. Right side panel;

[0058] X: width direction; Y: depth direction; Z: height direction. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0060] In this application, the terms "upper," "rear," "inner," "outer," and "middle," etc., indicate orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0061] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain circumstances to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0062] Furthermore, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable link, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection via an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0063] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0064] Range hoods generate considerable noise during operation, primarily from two sources. One is the vibration produced by the fan itself. This vibration is transmitted to the fan housing structure, causing it to vibrate and produce noise. The other source is the noise generated by the airflow created by the fan within the range hood. This airflow vibrates during its movement, and the friction or impact of the airflow against the range hood's structural surfaces also contributes to the noise.

[0065] To reduce the noise generated by range hoods during operation, the inventors attempted to incorporate a silencing cavity inside the smoke collection hood. When airflow passes through this cavity, the noise generated by the airflow is significantly reduced. While the silencing cavity reduces noise caused by airflow, it has no effect on the noise generated by the fan. Furthermore, incorporating a silencing cavity inside the smoke collection hood increases its size. Since a larger structure requires higher strength sheet metal components, this noise reduction method also increases the manufacturing difficulty and cost of the range hood.

[0066] In addition, the inventors also tried to solve the noise generated by the vibration of the fan. For example, the inventors tried to add elastic components such as rubber and springs to absorb energy and reduce vibration. However, the damping effect of rubber and springs is limited, and they are easily affected by oil fumes and will age and be damaged.

[0067] In view of this, embodiments of this application provide a range hood with a first protruding structure on the bottom plate of the housing housing the fan. The first protruding structure is located on the surface of the bottom plate facing the fan and protrudes towards the fan. Thus, when airflow enters the housing from the flue, the multiple first protruding structures can guide part of the airflow, directing it towards the fan's suction inlet, improving the efficiency of airflow exhaust from the fan to the outside, thereby increasing the range hood's smoke extraction efficiency. Simultaneously, the first protruding structure acts as a reinforcing rib, thereby increasing the structural strength of the bottom plate. Since the main body is connected to the bottom plate, the main body is more stable and less susceptible to vibration. During the operation of the range hood, the impact of fan-induced vibration on the bottom plate and main body is reduced, thus reducing noise generated by the fan within the housing. Furthermore, the multiple first protruding structures can also guide airflow into the fan's suction inlet. Moreover, due to the guiding effect of the first protruding structures, turbulence in the airflow inside the housing is reduced, thereby reducing vibration and noise caused by airflow turbulence.

[0068] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0069] Please see Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the structure of the range hood in the embodiments of this application. Figure 2 yes Figure 1 The diagram shown is a front view of a range hood. Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the range hood along the B-B' direction. Figure 4 yes Figure 1 The diagram shown is an exploded view of the range hood's casing.

[0070] In some embodiments, the range hood 1 includes a housing 11, which serves as the main body of the fan frame of the range hood 1 and is primarily a sheet metal structure. The housing 11 has an internal cavity 11a.

[0071] It is understandable that the box 11 is roughly hexahedral in shape, that is, cuboid in shape, and the box 11 has two mutually perpendicular width directions X, depth directions Y and height directions Z.

[0072] In some embodiments, the range hood 1 further includes a fan 12, which is disposed on the housing 11 and located in the receiving cavity 11a. The fan is used to provide suction power to exhaust cooking fumes outdoors.

[0073] Specifically, the fan 12 has a smoke inlet 12a, through which the oil fumes in the receiving cavity 11a enter the interior of the fan 12 and are discharged to the outside through the fan 12.

[0074] In some embodiments, the range hood 1 further includes a smoke collection hood 13, which is located below and connected to the housing 11 in the height direction Z. The smoke collection hood 13 has a flue 13a and a smoke inlet 13b. One end of the flue is connected to the receiving cavity 11a, and the other end is connected to the smoke inlet 13b. When the fan 12 is working, it draws air out of the housing 11, creating a negative pressure inside the housing 11. This causes the air inside the smoke collection hood 13 to move into the housing 11, thereby transferring air outside the smoke inlet 13b into the smoke collection hood 13. In this way, the fan 12 can create airflow inside the housing 11 and the smoke collection hood 13 to continuously draw in and exhaust the fumes outside the smoke inlet 13b to the outside.

[0075] In some embodiments, the housing 11 includes a main body 111, which is a cylindrical structure and forms the aforementioned receiving cavity 11a. The fan 12 is disposed in the main body 111. The main body 111 has a first opening 111a and a second opening 111b arranged opposite to each other in the height direction Z of the housing 11, and both the first opening 111a and the second opening 111b communicate with the receiving cavity 11a.

[0076] In some embodiments, the housing 11 further includes a top plate 112 and a bottom plate 113. In the height direction Z of the housing 11, the top plate 112 is connected to the upper side of the main body 111 and covers the first opening 111a, while the bottom plate 113 is connected to the lower side of the main body 111 and covers a portion of the second opening 111b, so as to form an air inlet 111c with the main body 111. The air inlet 111c communicates with the receiving cavity 11a and the flue 13a, so that the flue 13a communicates with the receiving cavity 11a.

[0077] As an example, the air inlet 111c is located near the rear side of the housing 11. It should be noted that the rear side of the housing 11 is the side away from the user when the range hood 1 is installed on the wall, while the front side of the housing 11 is the side facing the user.

[0078] In some embodiments, the surface of the base plate 113 facing the fan 12 is provided with multiple first protrusions 1131 protruding towards the fan 12. These first protrusions 1131 guide airflow into the smoke inlet 12a of the fan 12. This arrangement allows the first protrusions 1131 to act as reinforcing ribs, thereby improving the structural strength of the base plate 113. Since the main body 111 is connected to the base plate 113, it becomes more stable and less susceptible to vibration. During the operation of the range hood 1, the impact of vibrations caused by the fan 12 on the base plate 113 and the main body 111 is reduced, thus lowering the noise generated by the fan on the housing 11. The housing 11 also better prevents sound waves generated by the fan 12 from propagating outwards. Furthermore, the multiple first protrusions 1131 also guide airflow into the smoke inlet 12a of the fan 12. In this way, when the airflow enters the interior of the housing 11 through the flue 13a, the multiple first protrusions 1131 can guide part of the airflow, causing this part of the airflow to flow towards the smoke inlet 12a of the fan 12, thereby reducing the turbulence of the airflow inside the housing 11, thereby reducing the vibration and noise caused by the turbulence of the airflow, and also improving the efficiency of the airflow being discharged from the fan 12 to the outside, that is, improving the smoke extraction efficiency of the range hood 1.

[0079] See you again Figure 4 See also Figure 5 and Figure 6 , Figure 5 yes Figure 1 The diagram shown is a side view of the range hood's casing. Figure 6 yes Figure 3 A magnified view of region C in the middle.

[0080] In some embodiments, the main body 111 includes a front panel 1111, a back panel 1112, a left panel 1113, and a right panel 1114. The front panel 1111 is connected between the top panel 112 and the bottom panel 113. The back panel 1112 is connected to the top panel 112. In the depth direction Y of the housing 11, the back panel 1112 is arranged opposite to the front panel 1111, and the back panel 1112 is also connected to the smoke hood 13. The left panel 1113 is connected between the front panel 1111 and the back panel 1112, and also between the top panel 112 and the bottom panel 113. The right panel 1114 is connected between the front panel 1111 and the back panel 1112, and also between the top panel 112 and the bottom panel 113. Furthermore, the left panel 1113 and the right panel 1114 are arranged opposite to each other in the width direction X of the housing 11. It is understandable that the front panel 1111 is located on the front side of the housing 11, and the back panel is located on the rear side of the housing 11.

[0081] In some embodiments, the front panel 1111, left panel 1113, and right panel 1114 are configured as a single integral component. Exemplarily, the front panel 1111, left panel 1113, and right panel 1114 can be formed by bending the same sheet metal part, thus improving the utilization rate of the sheet metal part and reducing material waste. Simultaneously, the fact that the front panel 1111, left panel 1113, and right panel 1114 are an integral component enhances the overall structural strength of the main body 111. This allows the housing 11 to better prevent noise waves from propagating to the outside of the housing 11, further reducing the noise generated by the range hood 1 during operation and providing a better noise reduction effect.

[0082] When the front plate 1111, left plate 1113, and right plate 1114 are configured as a single integral component, the back plate 1112 is independently configured and detachably connected to the left plate 1113 and right plate 1114 to jointly construct the aforementioned main body 111. In this case, the back plate 1112 can serve as a maintenance cover; in other words, when the fan 12 malfunctions, maintenance personnel can remove the back plate 1112 to expose the interior of the main body 111 and perform maintenance on the fan 12.

[0083] Optionally, the connection between the back plate 1112 and the left plate 1113 and right plate 1114 can be achieved by screwing, snap-fitting, or plugging. For example, a connection hole (not shown) can be provided on the back plate 1112, and a buckle (not shown) can be provided on the left plate 1113 and right plate 1114, allowing the buckle to pass through the connection hole for fixation; that is, fixation is achieved by buckle fixing. To improve the stability of the connection between the back plate 1112 and the left plate 1113 and right plate 1114, the buckle fixing can be set as a sliding buckle fixing, that is, after the buckle passes through the connection hole, the buckle slides relative to the connection hole to achieve buckle fixing.

[0084] In some embodiments, to further reduce the noise generated by the range hood 1 during operation, at least one of the front panel 1111, back panel 1112, left panel 1113, and right panel 1114 is provided with a plurality of second protrusion structures 1115 protruding toward the fan 12. The second protrusion structures 1115 extend along the height direction Z of the housing 11 and are spaced apart along the width direction X of the housing 11. By providing second protrusion structures 1115 protruding toward the fan 12 on other plates constituting the main body 111, the overall structural strength of the housing 11 can be improved, thereby reducing the impact of vibration on the housing 11. The housing 11 can better prevent sound wave propagation, thereby reducing the noise generated by the range hood 1 during operation. Meanwhile, since the second protruding structure 1115 extends along the height direction of the housing 11, when the airflow enters the receiving cavity 11a from the air inlet 111c, the second protruding structure 1115 can also guide the airflow upward to the fan 12, so as to reduce the turbulence of the airflow and improve the smoke extraction efficiency of the range hood 1.

[0085] In some embodiments, in the direction from the rear side of the housing 11 to the front side of the housing 11, that is, in the direction from the back plate 1112 to the front plate 1111, the bottom plate 113 extends obliquely upward along the height direction Z of the housing 11. The angle between the extension direction of the bottom plate 113 and the depth direction Y of the housing 11 is α, and α satisfies the relationship: 6°≤α≤20°. For example, α can be 6°, 8°, 10°, 12°, 14°, 16°, 18°, 20°, or other angle values ​​within this range. Within this range, when the airflow enters the receiving cavity 11a, the bottom plate 113 can guide part of the airflow upward to the fan 12, so that this part of the airflow enters the smoke inlet 12a of the fan 12. At the same time, it can ensure that the receiving cavity 11a formed by the housing 11 has sufficient space to place the fan 12. When α<6°, the tilt angle of the bottom plate 113 is small, and the guiding effect on the airflow is weak. When α > 20°, the tilt angle of the base plate 113 is too large, and the space of the receiving cavity 11a formed by the box 11 is insufficient to place the fan 12. The only way to place the fan 12 is to increase the volume of the box 11, which is detrimental to the miniaturization and lightweight design of the range hood 1. For example... Figure 6 As shown, Figure 6 The dashed arrows in the diagram are used to indicate the flow path of the airflow entering the box.

[0086] In some embodiments, the smoke hood 13 is further provided with a smoke outlet (not shown), which is located on the upper side of the smoke hood 13. Specifically, the air inlet 111c and the smoke outlet are correspondingly provided and connected, so that the receiving cavity 11a is connected to the flue 13a.

[0087] Please see also Figure 7 , Figure 7 This is a schematic diagram of the connection between the back plate and the smoke hood in this embodiment.

[0088] In some cases, along the width direction X of the housing 11, the smoke hood 13 has connecting parts 131 at the edges forming the smoke outlet, which are respectively connected to the left plate 1113 and the right plate 1114. For example, the opposite sides of the left plate 1113 and the right plate 1114 are respectively connected to the smoke hood 13 by screws. In this case, the smoke hood 13 will exert force on the left plate 1113 and the right plate 1114 along the width direction X of the housing 11, causing the left plate 1113 and the right plate 1114 to shift in a direction away from each other. When the back plate 1112 is connected to the left plate 1113 and the right plate 1114, gaps will appear between the back plate 1112 and the left plate 1113, and / or between the back plate 1112 and the right plate 1114 due to the shift of the left plate 1113 and the right plate 1114, resulting in oil leakage. In some embodiments, the left plate 1113 and the right plate 1114 are fixedly connected to the rear side of the smoke hood 13, for example, to the rear side plate 132 of the smoke hood 13, on the side opposite to the front plate 1111 in the depth direction Y of the housing 11. Furthermore, the connection position L1 between the left plate 1113 and the right plate 1114 and the rear side of the smoke hood 13 is located between the two connecting portions 131 of the smoke hood 13 forming the smoke outlet in the width direction X of the housing 11. Thus, after the left plate 1113 and the right plate 1114 are fixedly connected to the rear side of the smoke hood 13 on the side opposite to the front plate 1111, the left plate 1113 and the right plate 1114 can be shifted closer to each other under the action of the smoke hood 13 to reduce or eliminate the gap with the back plate 1112, thereby reducing or preventing oil leakage. Meanwhile, since the gaps between the left plate 1113 and the right plate 1114 and the back plate 1112 are reduced or eliminated, the sealing of the receiving cavity 11a is improved, which can better prevent noise from spreading to the outside of the enclosure 11 and reduce noise. In addition, the edges of the left plate 1113, the right plate 1114 and the back plate 1112 are more tightly joined, which makes the left plate 1113, the right plate 1114 and the back plate 1112 more stable and less susceptible to vibration, which can also reduce noise.

[0089] Please see also Figures 8 to 10 , Figure 8 This is a schematic diagram of the structure of the base plate in one embodiment of this application. Figure 9 yes Figure 8 The diagram shows a top view of the base plate. Figure 10 This is a schematic diagram of another structure of the base plate in an embodiment of this application.

[0090] In some embodiments, the opening of the smoke inlet 12a of the fan 12 faces the front side of the housing 11, that is, the smoke inlet 12a is disposed facing the front panel 1111. A plurality of first protrusions 1131 extend from the rear side of the housing 11 toward the front side of the housing 11, and the plurality of first protrusions 1131 are spaced apart in a direction perpendicular to their own extension direction.

[0091] For example, multiple first protrusions 1131 extend along the back plate 1112 toward the front plate 1111 (depth direction Y of the housing 11) and are spaced apart along the left plate 1113 toward the right plate 1114 (width direction X of the housing 11). In this way, the multiple first protrusions 1131 can form multiple air ducts. When the airflow enters the receiving cavity 11a from the smoke hood 13 through the air inlet 111c, these air ducts can guide part of the airflow. Since the orientation of the smoke inlet 12a is consistent with the extension direction of the first protrusions 1131, the number of turns of the airflow inside the housing 11 can be reduced, so that this part of the airflow flows along the air duct and flows toward the smoke inlet 12a of the fan 12. This allows the airflow to enter the smoke inlet quickly and accurately, and the oil fumes are discharged to the outside by the fan 12. That is, it can improve the oil fume exhaust efficiency of the range hood 1, and also reduce the impact of the airflow on the housing 11, thereby reducing the noise of the range hood 1 during operation.

[0092] Of course, the opening orientation of the smoke inlet 12a of the fan 12 can also be adjusted, and the extension direction of the first protrusion structure 1131 can be adjusted adaptively, as long as the extension direction of the first protrusion structure 1131 is approximately the same as the orientation of the smoke inlet 12a.

[0093] In some embodiments, the fan 12 has two smoke inlets 12a, which are spaced apart in the depth direction Y of the housing. In this way, the airflow entering the receiving cavity 11a can enter the interior of the fan 12 simultaneously through the two smoke inlets 12a and be discharged to the outside by the fan 12, which can improve the smoke extraction efficiency of the range hood 1.

[0094] In some embodiments, at least a portion of the first protruding structures 1131 extend obliquely in the direction from the rear side of the housing 11 toward the front side of the housing 11, such that the distance d1 between the ends of the plurality of first protruding structures 1131 near the front side of the housing 11 is less than the distance d2 between the ends of the plurality of first protruding structures 1131 away from the rear side of the housing 11. Exemplarily, in the direction from the back panel 1112 toward the front panel 1111, the plurality of first protruding structures 1131 also extend obliquely toward each other. This makes the distance d1 between any two adjacent first protruding structures 1131 near the front panel 1111 in the width direction X of the housing 11 less than the distance d2 between the ends near the back panel 1112 in the width direction X of the housing 11. This design allows the airflow to converge and concentrate as it flows toward the front of the housing 11 while passing through these first protruding structures 1131, forming a confluence to accurately introduce the airflow into the smoke inlet 12a of the fan 12, thereby further improving the smoke extraction efficiency of the range hood 1.

[0095] In some embodiments, the extensions of the plurality of first protrusions 1131 in their respective extending directions intersect at a point, so that the plurality of first protrusions 1131 are arranged in a fan shape. In this way, the plurality of air ducts formed by the plurality of first protrusions 1131 can concentrate and guide the airflow to the smoke inlet 12a of the fan 12. At the same time, arranging the plurality of first protrusions 1131 in a fan shape can concentrate and guide the airflow while making the airflow distribution relatively balanced, which can reduce the noise caused by airflow turbulence and prevent local high pressure from occurring inside the housing 11. In addition, the regular fan-shaped distribution of the plurality of first protrusions 1131 can also make the overall mechanical properties of the base plate 113 relatively balanced.

[0096] It should be noted that when multiple first protruding structures 1131 are arranged in a fan shape, they can be arranged either roughly in a fan shape or in a regular fan shape. For example, a portion of the first protruding structures 1131 near the left plate 1113 can extend obliquely to form a fan shape, while another portion of the first protruding structures 1131 can still be set to extend in a straight line in the direction from the back plate 1112 to the front plate 1111. In this case, all the first protruding structures 1131 are roughly arranged in a fan shape. Alternatively, the extension lines of multiple first protruding structures 1131 in their own extension directions can intersect at the same point. In this case, all the first protruding structures 1131 are arranged in a regular fan shape, which is a part of a circle. Of course, the extension lines of multiple first protruding structures 1131 in their own extension directions can also intersect at different points. For example, the extensions of a portion of the first protrusions 1131 near the left plate 1113 in their own extending directions intersect at the same point, while the extensions of another portion of the first protrusions 1131 near the right plate 1114 in their own extending directions intersect at a different point. Alternatively, the extensions of all the first protrusions 1131 in their own extending directions intersect at different points.

[0097] Of course, in some other embodiments, the plurality of first protrusion structures 1131 may also be arranged radially. Similarly, with this arrangement, the distance d1 between any two adjacent first protrusion structures 1131 near the end of the front plate 1111 in the width direction X of the housing 11 is less than the distance d2 between the ends near the back plate 1112 in the width direction X of the housing 11.

[0098] Please see also Figures 11 to 13 , Figure 11 yes Figure 9 The diagram shows a cross-sectional view of the base plate along the D-D' direction. Figure 12 yes Figure 11 Enlarged diagram of region F in the middle, Figure 13 yes Figure 9The diagram shows a cross-sectional view of the base plate along the E-E' direction.

[0099] In some embodiments, the base plate 113 has a recessed portion 113a on the surface facing away from the fan 12, so that a first protruding structure 1131 is formed on the surface of the base plate 113 facing the fan 12. This allows the first protruding structure 1131 to be formed on the surface of the base plate 113 facing the fan 12, improving the structural strength of the base plate 113 and scattering sound waves inside the housing 11. Simultaneously, it avoids increasing the weight of the base plate 113 and reduces the material consumption in manufacturing the base plate 113. For example, the recessed portion 113a facing the fan 12 can be directly formed on the base plate 113 by stamping or other methods, and the bottom of the recessed portion 113a forms the aforementioned first protruding structure 1131. This prevents the outer surface of the housing 11 from protruding, thus preventing the outer surface of the housing 11 from affecting the normal installation of the range hood 1.

[0100] In some embodiments, the depth of the recess 113a in the thickness direction of the base plate 113 is D, and D satisfies the relationship: 2mm ≤ D ≤ 4mm. For example, D can be 2mm, 2.5mm, 3mm, 3.5mm, 4.0mm, or other sizes within this range. Within the above range, the structural strength of the base plate 113 can be improved by setting the molding area, thereby reducing the impact of vibration on the base plate 113 and avoiding increasing the weight of the base plate 113, which helps to achieve the lightweight design of the range hood 1. At the same time, by reasonably setting the depth of the recess 113a, the structural strength of the base plate 113 can be improved while ensuring that the first protruding structure 1131 has sufficient height to guide airflow and avoiding the base plate 113 being too thin. When D < 2mm, the depth of the recess 113a is small, resulting in a small height of the first protruding structure 1131. The first protruding structure 1131 cannot effectively guide airflow, and the effect of enhancing the structural strength of the base plate 113 is also limited. When D > 4 mm, the depth of the recess 113a is relatively large, which will cause the overall thickness of the base plate 113 to become too thin and easily deformed.

[0101] In some embodiments, the width of the recess 113a in the width direction X of the housing 11 is W, and W satisfies the relationship: 10mm ≤ W ≤ 30mm. For example, W can be 10mm, 15mm, 20mm, 25mm, 30mm, or other values ​​within this range. Within this range, it can be ensured that the first protrusion structure 1131 has an appropriate width, suitable for guiding airflow, and avoiding the first protrusion structure 1131 being too small or too large. At the same time, the first protrusion structure 1131 having an appropriate width also facilitates the formation of the recess 113a on the base plate 113 by means of stamping or the like. When W < 10mm, the width of the recess 113a is small, and it is more difficult to form the recess 113a by means of stamping or the like. When W > 30mm, it will result in the first protrusion structure 1131 being too large. The excessively wide first protrusion structure 1131 will cause greater wind resistance to the airflow inside the housing 11, which is not conducive to guiding the airflow into the fan 12.

[0102] In some embodiments, the ratio of the area of ​​the region where the recess 113a is provided on the base plate 113 to the area of ​​the base plate 113 is greater than 0.5. That is, the area of ​​the region where the recess 113a is provided accounts for more than 50% of the entire base plate 113, which can effectively enhance the structural strength of the base plate 113.

[0103] In some embodiments, the area of ​​the region where the recess 113a is provided may not account for more than 90% of the total area of ​​the base plate 113. This is to avoid the overall thickness of the base plate 113 being too small due to an excessively large area of ​​the molding region.

[0104] In some embodiments, the first protruding structure 1131 is a plate (not shown), which is fixedly connected to the base plate 113. For example, the first protruding structure 1131 can be shaped like a rib or heat dissipation fin. It is understood that when the first protruding structure 1131 is a plate, the first protruding structure 1131 and the base plate 113 can be separate structures. For example, the first protruding structure 1131 is fixed to the base plate 113 by welding, screwing, snap-fitting, etc. When the first protruding structure 1131 is a separately provided plate, it is fixedly connected to the base plate 113. In this way, these plates can not only act as reinforcing ribs to improve the overall structural strength of the base plate 113, but also guide the airflow, helping to adjust the airflow inside the housing 11, reduce vibration caused by airflow, and improve the airflow efficiency towards the smoke inlet 12a of the fan 12, thereby improving the smoke extraction efficiency of the range hood 1.

[0105] Of course, in some other examples, the first protrusion structure 1131 can be integrated with the base plate 113 as an integral component, for example, the base plate 113 with the first protrusion structure 1131 can be directly formed by casting or other methods.

[0106] It is understandable that when the first protruding structure 1131 is a plate, the first protruding structure 1131 can refer to the above description and set these plates to extend at an angle toward each other, so as to guide the airflow to form a convergence, so that the airflow accurately flows into the smoke inlet 12a.

[0107] Optionally, when the first protrusion structure 1131 is a plate, the first protrusion structure 1131 can be a structural component with sufficient strength and elasticity, such as sheet metal or plastic.

[0108] In some embodiments, at least a portion of the plate is provided with a plurality of noise reduction holes (not shown), which penetrate the plate along its thickness direction. Thus, during the operation of the range hood 1, some of the noise sound waves propagate into the noise reduction holes, are reflected within them, and remain there. Some of the sound waves also do work on the plate, thus consuming some of the noise energy and reducing the noise propagating outward from the range hood 1.

[0109] Understandably, the shape of the noise reduction hole can be circular, oval, elliptical, square, or other shapes. The size of the noise reduction hole can be appropriately set according to the noise frequency band generated by the range hood 1 during operation, combined with the specific material of the plate, so that the noise reduction hole can specifically weaken the noise generated by the range hood 1, thereby achieving efficient noise reduction. In addition, by setting noise reduction holes on the plate, an air layer can be formed between adjacent plates. When sound enters the air layer, if the noise frequency band is the same as the air layer's own frequency band, resonance will occur, thereby consuming noise energy and achieving further noise reduction.

[0110] Understandably, the second protruding structure 1115 can be configured in the same manner as the first protruding structure 1131 described above. For example, the second protruding structure 1115 can be formed on the surface facing the fan 12 by providing a recess on the side of the plate constituting the main body 111 facing away from the fan 12. Alternatively, plates extending along the height direction Z of the housing 11 can be provided on the surface of the plate constituting the main body 111 facing the fan 12, and these plates can be spaced apart in the width direction X of the housing 11.

[0111] Please see also Figures 14 to 16 , Figure 14 This is a schematic diagram of the structure of a range hood with a decorative cover according to an embodiment of this application. Figure 15 yes Figure 14 The diagram shown illustrates the structure of the decorative cover. Figure 16 yes Figure 1 An enlarged schematic diagram of region A in the middle.

[0112] In some embodiments, the range hood 1 further includes a decorative cover 14, which surrounds the front panel 1111, the left panel 1113 and the right panel 1114. The decorative cover 14 is used to cover the housing 11, making the appearance of the range hood 1 more flat and beautiful.

[0113] It is understood that the decorative cover 14 includes a front panel 141, a left panel 142, and a right panel 143, with the front panel 141 connecting the left panel 142 and the right panel 143. The front panel 141, the left panel 142, and the right panel 143 are arranged in a one-to-one correspondence with the front panel 1111, the left panel 1113, and the right panel 1114.

[0114] In some embodiments, along the depth direction Y of the housing 11, the left side panel 142 and the right side panel 143, respectively, are connected to the sides of the left side panel 1113 and the right side panel 1114, respectively, that are opposite to the front side panel 141. For example, multiple screws can be used for screw-on fixing. Simultaneously, the end of the front side panel 141 near the smoke hood 13 can be fixedly connected to the smoke hood 13 using multiple screws to improve the connection strength of the decorative cover 14.

[0115] In some embodiments, a buckle 1411 may be provided at the end of the front side panel 141 near the smoke hood 13, and a slot 13c is provided in the smoke hood 13 at the position corresponding to the buckle. When installing the decorative cover 14, the buckle 1411 can be first inserted into the slot 13c to achieve positioning, so that the decorative cover 14 is aligned with the smoke hood 13. Then, the decorative cover 14 is fixed to the smoke hood 13 with screws.

[0116] The above provides a detailed description of the range hood provided in the embodiments of this utility model. 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 idea of ​​this utility model. There may be changes in the specific implementation and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A range hood, characterized in that, include: The housing has a receiving cavity; A fan is disposed in the housing and located in the receiving cavity, and the fan has a smoke inlet that communicates with the receiving cavity; A smoke collection hood is provided below the housing in the height direction of the housing. The smoke collection hood has a flue and a smoke inlet. One end of the flue is connected to the receiving cavity, and the other end of the flue is connected to the smoke inlet. The enclosure includes: The main body is cylindrical and forms the receiving cavity. The main body has a first opening and a second opening arranged opposite to each other in the height direction of the box. A top plate is connected to the upper side of the main body along the height direction of the box, and the top plate covers the first opening; A base plate is connected to the lower side of the main body along the height direction of the housing, and the base plate covers a portion of the second opening to form an air inlet with the main body. The air inlet communicates with the receiving cavity so that the flue communicates with the receiving cavity. The base plate has a plurality of first protrusions on the surface facing the fan, which are used to guide airflow into the smoke inlet.

2. The range hood according to claim 1, characterized in that, The opening of the smoking port faces the front side of the box body, and a plurality of first protrusions extend from the rear side of the box body toward the front side of the box body, and the plurality of first protrusions are spaced apart in a direction perpendicular to their own extension direction.

3. The range hood according to claim 2, characterized in that, In the direction from the rear side of the housing toward the front side of the housing, at least a portion of the first protrusions also extend obliquely such that the distance between the ends of the plurality of first protrusions near the front side of the housing is less than the distance between the ends of the plurality of first protrusions away from the rear side of the housing.

4. The range hood according to claim 3, characterized in that, The multiple first protrusion structures are arranged in a fan shape.

5. The range hood according to any one of claims 1-4, characterized in that, The base plate has a recessed portion on the surface away from the fan, so that the base plate forms the first protruding structure on the surface facing the fan. In the thickness direction of the base plate, the depth of the recessed portion is D, and D satisfies the relationship: 2mm≤D≤4mm.

6. The range hood according to any one of claims 1-4, characterized in that, The first protruding structure is a plate, which is fixedly connected to the base plate.

7. The range hood according to claim 6, characterized in that, At least a portion of the plate is provided with a plurality of noise reduction holes, which penetrate the plate along the thickness direction of the plate.

8. The range hood according to any one of claims 1-4, characterized in that, In the direction from the rear to the front of the box, the bottom plate extends obliquely upward along the height direction of the box, and the angle between the extension direction of the bottom plate and the depth direction of the box is α, and α satisfies the relationship: 6°≤α≤20°.

9. The range hood according to any one of claims 1-4, characterized in that, The main body includes: Front panel, the front panel being connected between the top panel and the bottom panel. A back panel, which is connected to the top panel, is arranged opposite to the front panel in the depth direction of the housing, and is also connected to the smoke collection hood; The left plate is connected between the front plate and the back plate, and between the top plate and the bottom plate. The left plate is also connected to the smoke collection hood. The right panel is connected between the front panel and the back panel, and between the top panel and the bottom panel. In the width direction of the housing, the left panel is arranged opposite to the right panel, and the right panel is also connected to the smoke hood. At least one of the front plate, the back plate, the left plate, and the right plate is provided with a plurality of second protrusion structures protruding toward the fan. The second protrusion structures extend along the height direction of the housing and are arranged at intervals along the width direction of the housing.

10. The range hood according to claim 9, characterized in that, The smoke hood is provided with a smoke outlet, which is connected to the flue. In the width direction of the housing, the left and right plates are respectively connected to the smoke hood on opposite sides, so that the air inlet is connected to the smoke outlet. The left and right plates are also fixedly connected to the rear side of the smoke hood on the side opposite to the front plate. In the width direction of the housing, the connection position of the left and right plates to the rear side of the smoke hood is located between the two sides of the smoke hood that form the smoke outlet in the width direction of the housing.

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