Range hood

Abstract

The application discloses a range hood. The range hood has a front side and a rear side opposite to the front side in a first direction. The range hood comprises a frame, a smoke collecting assembly and an air outlet device. The smoke collecting assembly is mounted on the frame, the frame and the smoke collecting assembly are arranged in a second direction, and the smoke collecting assembly has an air inlet. The smoke collecting assembly comprises a smoke suction plate, a front plate and a rear plate, and the smoke suction plate, the front plate and the rear plate surround to form a smoke collecting cavity which faces away from the frame in the second direction. The air outlet device is arranged on a side of the smoke suction plate away from the frame. In the second direction, one end of the smoke suction plate close to the front plate is located on a side away from the frame compared with the other end of the smoke suction plate close to the rear plate. In a third direction, the air outlet device is arranged on at least one side of the air inlet, and the third direction is perpendicular to the first direction and the second direction. In this way, the range hood can improve the smoke suction effect.

Description

Technical Field

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

[0002] In modern kitchens, range hoods effectively remove cooking fumes, ensuring a clean and healthy environment. With the continuous development of range hood technology, higher demands are being placed on their performance. The smoke extraction efficiency is a key performance indicator, and improving it requires ongoing research and innovation. Maintaining effective smoke extraction even in smaller sizes is a topic worthy of further exploration. Utility Model Content

[0003] The embodiments of this application provide a range hood that can improve the smoke extraction effect of the range hood.

[0004] This application provides a smoke hood. The smoke hood has a front side and a rear side opposite to it in a first direction. The smoke hood includes a frame, a smoke collection assembly, and an air outlet device. The smoke collection assembly is mounted on the frame, and the frame and the smoke collection assembly are arranged in a second direction. The smoke collection assembly has an air inlet for drawing in smoke. The smoke collection assembly includes a smoke extraction plate, a front plate, and a rear plate. In the first direction, the front plate is located in front of the smoke extraction plate, and the rear plate is located in front of the smoke extraction plate. The smoke extraction plate is provided with an air inlet. The smoke extraction plate, the front plate, and the rear plate surround and form a smoke collection cavity facing away from the frame in the second direction. The air outlet device is disposed on the side of the smoke extraction plate away from the frame. In the second direction, the end of the smoke extraction plate near the front plate is located away from the frame compared to the end of the smoke extraction plate near the rear plate.

[0005] The beneficial effects of this application are: unlike the prior art, the exhaust device can change the flow field by exhausting air, thereby promoting the backward movement of flue gas and reducing the possibility of flue gas leakage from the front of the flue gas fan. The exhaust device promotes the backward movement of flue gas. Attached Figure Description

[0006] Figure 1 This is a structural schematic diagram of Embodiment 1 of the smoke machine of this application;

[0007] Figure 2 This is a schematic diagram of the structure of the first embodiment of the smoke machine of this application;

[0008] Figure 3 yes Figure 2 The image shows a bottom view of the range hood.

[0009] Figure 4 yes Figure 3 A cross-sectional view of the smoke collection assembly in the smoke hood at the air outlet;

[0010] Figure 5 yesFigure 4 A schematic diagram of another angle of the cross-sectional view of the smoke collection assembly shown;

[0011] Figure 6 yes Figure 2 A schematic diagram of an embodiment of the air outlet device in the range hood shown;

[0012] Figure 7 yes Figure 2 A schematic diagram of another embodiment of the air outlet device in the range hood shown;

[0013] Figure 8 yes Figure 2 The schematic diagram shown is a structural diagram of another embodiment of the air outlet device in the range hood.

[0014] Figure 9 This is a structural schematic diagram of the second embodiment of the smoke machine of this application;

[0015] Figure 10 yes Figure 9 A schematic diagram of the structure of an embodiment of the range hood exhaust device shown;

[0016] Figure 11 yes Figure 9 The image shows a bottom view of the range hood.

[0017] Figure 12 yes Figure 11 A cross-sectional view of the smoke collection assembly in the smoke hood at the air outlet;

[0018] Figure 13 yes Figure 12 A schematic diagram of another angle of the cross-sectional view of the smoke collection assembly shown;

[0019] Figure 14 This is a structural schematic diagram of the third embodiment of the smoke machine of this application;

[0020] Figure 15 yes Figure 14 The diagram shows the structure of the air outlet device in the illustrated smoke hood embodiment;

[0021] Figure 16 yes Figure 14 The image shows a bottom view of the range hood.

[0022] Figure 17 yes Figure 16 A cross-sectional view of the smoke collection assembly in the smoke hood at the air outlet;

[0023] Figure 18 yes Figure 17 A schematic diagram of another angle of the cross-sectional view of the smoke collection assembly shown;

[0024] Figure 19 This is a structural schematic diagram of the fourth embodiment of the smoke machine of this application. Detailed Implementation

[0025] 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 a part of the embodiments of this application, and not all of the 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 scope of protection of this application.

[0026] Combination Figure 1 This application provides a smoke hood 1. The smoke hood 1 includes a frame 10 and a smoke collection assembly 20, with an air inlet 231 provided on the smoke collection assembly 20. The smoke collection assembly 20 is mounted on the frame 10, and the smoke hood 1 can be mounted on a wall or other installation location via the frame 10. The smoke hood 1 has a mounting surface; for example, if the smoke hood 1 is mounted on a wall, the surface of the smoke hood 1 that abuts against the wall is the mounting surface of the smoke hood 1. The frame 10 is provided with an exhaust port (not shown), which can be connected to an external flue via a pipe. A volute is also provided inside the frame 10, and a centrifugal impeller is provided inside the volute. The volute can communicate with the interior of the smoke collection assembly 20, and the convection generated by the rotation of the centrifugal impeller can drive the gas inside the smoke collection assembly 20 to the exhaust port for discharge. The smoke collection assembly 20 is mounted on the frame 10, and the smoke collection assembly 20 can gather and collect the smoke, which is then discharged through the frame 10.

[0027] It should be noted that, for ease of description, this application uses a first direction (illustrated by X in the figures), a second direction (illustrated by Y in the figures), and a third direction (illustrated by Z in the figures) to exemplarily describe the relative positional relationships of the components. Specifically, the range hood 1 has a front side closer to the user and a rear side opposite to it in the first direction. In a kitchen setting, the front side faces the user, and the rear side faces the wall. The second direction is the arrangement direction of the frame 10 and the smoke collection assembly 20. The third direction is perpendicular to the first and second directions. In some embodiments, the first direction is a front-to-back direction, the second direction is a vertical direction, and the third direction is a left-to-right direction from the user's perspective. Optionally, the first, second, and third directions are perpendicular to each other.

[0028] Combination Figure 2 , Figure 9 , Figure 14 and Figures 2 to 8In some embodiments, the smoke hood 1 includes a frame 10, a smoke collection assembly 20, and an air outlet 30. The smoke collection assembly 20 has an air inlet 231 for drawing in smoke. Smoke can be discharged from the air inlet 231 after passing through the smoke collection assembly 20 and the frame 10. The smoke collection assembly 20 includes a smoke extraction plate 23, a front plate 21, and a rear plate 22. In a first direction, the front plate 21 is located in front of the smoke extraction plate 23, and the rear plate 22 is located behind the smoke extraction plate 23. The smoke extraction plate 23, the front plate 21, and the rear plate 22 enclose a smoke collection chamber that faces away from the frame 10 in a second direction. The air outlet 30 is located on the side of the smoke extraction plate 23 away from the frame 10. In the second direction, the end of the smoke extraction plate 23 near the front plate 21 is located away from the frame 10 compared to the end of the smoke extraction plate 23 near the rear plate 22. In the smoke hood 1 provided in this application, the smoke extraction plate 23 is inverted with a lower front and a higher rear, which optimizes the pressure radiation direction of the smoke hood 1, increases the negative pressure area, and improves the smoke extraction effect. Optionally, the distance between the smoke extraction plate 23 and the frame 10 gradually decreases in the direction from the front to the rear. In other words, the smoke extraction plate 23 is inclined with a lower front and a higher rear. Optionally, the smoke collection assembly 20 also includes two side plates arranged opposite each other, which are respectively connected to the front plate 21 and the rear plate 22.

[0029] In some embodiments, the distance between the front side of the frame 10 and the front side of the front panel 21 in the first direction is less than or equal to 15 mm. In this way, the front side of the smoke collection assembly 20 protrudes less from the frame 10, making it easier to align the front side of the range hood 1 flush with the front side of the cabinet, or to directly embed the range hood 1 within the cabinet without exposing its front side to the user's view. Through these technical means, the range hood 1 can be installed concealed at all times, which is beneficial to the aesthetics of the kitchen.

[0030] In some embodiments, the distance between the front panel 21 and the rear panel 22 is less than or equal to 370 mm and greater than or equal to 300 mm. In this way, the smoke collection assembly 20 can have a smaller size, so that when the smoke collection assembly 20 is fitted to the wall on the rear side, the front side protrudes less from the cabinet, which is beneficial for achieving a flush installation of the front side of the range hood 1 with the cabinet or a fully concealed installation.

[0031] In some embodiments, the air outlet device 30 is disposed on the side of the smoke extraction plate 23 away from the frame 10, and the air outlet device 30 is disposed on at least one side of the air inlet 231. The air outlet device 30 can change the flow field by discharging air, thereby promoting the backward movement of smoke and reducing the possibility of smoke leakage from the front side of the smoke extraction machine 1. By setting the air outlet device 30 to promote the backward movement of smoke, the technical problem of smoke leakage from the front side caused by the reduction in the size of the smoke collection assembly 20 in the first direction in the aforementioned all-time concealed design can be solved. Optionally, the airflow source in the air outlet device 30 can be an airflow generating device. For example, the smoke collection assembly 20 is provided with an airflow generating device, which can be a fan that drives airflow to enter from the upper or outer side of the smoke collection assembly 20, and then provides the airflow to the air outlet device 30. The airflow generating device can also be an external device, which is not specifically limited here.

[0032] Specifically, the exhaust device 30 can interfere with the flow field by varying the exhaust direction and volume, thereby promoting the backward movement of the flue gas. In general, the exhaust device 30 can interfere with the flow direction of the flue gas in the following ways.

[0033] First, jet injection: when a high-speed air jet flows within the smoke collection chamber, it causes the adjacent airflow to move along the direction of the jet due to shear force, thus achieving a diversion effect. Therefore, when the exhaust direction of the exhaust device 30 has a component pointing towards the rear, it can guide the smoke to move backward.

[0034] Second, lateral ejection: when there is an airflow near the wall, the smoke will be deflected in that direction, thus optimizing the front-side smoking effect.

[0035] Third, the shielding effect: the air outlet of the air outlet device 30 can form an air curtain. By reducing the side air supply to the hot plume of smoke field through the air curtain, more air supply can be supplied from the front, thus adding a force towards the wall, which allows the smoke to flow backward. Specifically, the air intake of the air inlet 231 of the smoke hood 1 enters from all four sides below the smoke hood 1. By setting up an air curtain to shield the sides other than the front, the air intake on the shielded sides can be reduced. With the smoke extraction power of the smoke hood 1 remaining unchanged, the gas supplied from the front will increase, thereby promoting the smoke to move backward.

[0036] It should be noted that the description of the component of the air outlet direction in a specific direction is used multiple times in the embodiments of this application. The air outlet direction of the air outlet 34 refers to the normal direction of the surface where the air outlet 34 is located. The component of the air outlet direction in a specific direction refers to the projection of the normal direction of the surface where the air outlet 34 is located onto that specific direction. In different embodiments of this application, there is also a comparison of the components of the air outlet direction of the air outlet 34 in different directions. Taking the comparison of the components of the air outlet direction of the air outlet 34 in the first direction and the second direction as an example, the component of the air outlet direction of the air outlet 34 in the first direction is greater than the component in the second direction, that is, the angle between the air outlet direction and the first direction is smaller than the angle between the air outlet direction of the air outlet 34 and the second direction. Similarly, the component of the air outlet direction of the air outlet 34 in the first direction is less than the component in the second direction, that is, the angle between the air outlet direction and the first direction is greater than the angle between the air outlet direction of the air outlet 34 and the second direction.

[0037] The following will provide an exemplary description of the cooperation between the air outlet device 30 and the range hood 1, as well as the structure of the air outlet device 30, with reference to specific embodiments. The air outlet device 30 has multiple different embodiments, and these different embodiments can be combined with each other without contradiction, and are still within the protection scope of this application. Optionally, in the third direction, at least one air outlet device 30 is respectively provided on both sides of the air inlet 231. One or more air outlet devices 30 can be provided on the same side of the air inlet 231, and the air outlet device 30 can be any of the embodiments described below. The air outlet devices 30 provided on both sides of the air inlet 231 can be the same or different, and the air outlet devices 30 provided on both sides of the air inlet 231 can be any of the embodiments described below.

[0038] Combination Figures 6 to 8 In some embodiments, the air outlet 30 is installed on the smoke collection assembly 20. The air outlet 30 has an air outlet 34, and in a third direction, the air outlet 34 has at least a rearward component in its airflow direction. By discharging air to the rear through the air outlet 30, the airflow below the smoke collection assembly 20 can be moved to the rearward, thereby concentrating the smoke as much as possible below the smoke collection assembly 20, and then entering the air inlet 231 and being discharged through the frame 10. Furthermore, since the air outlet 30 mainly blows air to the rearward, the main position of the air curtain or airflow generated by the air outlet 30 is limited to a position close to the smoke collection assembly 20, thus reducing its additional disturbance to the main smoke field. Furthermore, the rearward-blown airflow can flow along the wall after hitting the wall surface, thereby deflecting the smoke towards the wall and optimizing the front smoke extraction effect. Optionally, the air outlet 34 may also have a component in the second direction that is away from the direction of the frame 10, and the component of the air outlet's air outlet direction toward the rear is greater than the component in the second direction that is away from the direction of the frame 10.

[0039] Specifically, the relationship between the air outlet 30 and the air inlet 231 can be as follows: In the first direction, the projections of the air outlet 30 and the air inlet 231 do not coincide. In a third direction, the air outlet 30 is located on one or both sides of the air inlet 231. In a third direction, the projections of the air outlet 30 and the air inlet 231 may partially coincide. Alternatively, in a third direction, the projections of the air outlet 30 and the air inlet 231 may not coincide. In other words, in a third direction, a partial air inlet 231 may be provided between the two air outlets 30, or there may be no air inlet 231. In the first direction, the air outlet 30 may be located in front of the air inlet 231. Alternatively, the air outlet 30 may have air inlets 231 on both sides in the first direction. By positioning the air outlet device 30 on both sides of the air inlet 231 in the third direction, the projection of the air outlet device 30 in the first direction does not coincide with the air inlet 231, thereby reducing the impact of the air outlet device 30's airflow on the air inlet 231.

[0040] In this embodiment, the air outlet device 30 is disposed in the portion of the smoke collection chamber near the front. By disposing the air outlet device 30 in the portion of the smoke collection chamber near the front, the airflow from the air outlet device 30 to the rear can travel a greater distance, allowing the airflow to more effectively move the smoke towards the rear, which is beneficial for improving the smoking effect.

[0041] In some embodiments, in the second direction, the distance between the end of the air outlet 34 near the smoke collection assembly 20 and the smoke extraction plate 23 is less than or equal to 25 mm. In other words, the distance between the upper end of the air outlet 34 and the smoke extraction plate 23 is less than or equal to 25 mm. For example, it can be 15 mm, 20 mm, or 25 mm. If the distance between the upper end of the air outlet 34 and the smoke extraction plate 23 is too large, it will restrict the size of the air outlet 34 in the second direction, which may easily lead to insufficient airflow from the air outlet 34.

[0042] In some embodiments, in the second direction, the distance between the end of the air outlet 34 away from the smoke collection assembly 20 and the end face of the smoke collection assembly 20 near the front and away from the frame 10 is less than or equal to 15 mm. In other words, the distance between the lower end of the air outlet 34 and the lower end face of the smoke collection assembly 20 near the front is less than or equal to 15 mm. When the lower end of the air outlet 34 is higher than the lower end face of the smoke collection assembly 20 near the front, by setting the distance between the lower end of the air outlet 34 and the lower end face of the smoke collection assembly 20 near the front to be less than or equal to 15 mm, the air outlet 34 can have sufficient length in the second direction, thereby providing a sufficient air outlet area. When the lower end of the air outlet 34 is lower than the lower end face of the smoke collection assembly 20 near the front, by setting the distance between the lower end of the air outlet 34 and the lower end face of the smoke collection assembly 20 near the front to be less than or equal to 15mm, the air outlet 34 can protrude downward from the smoke collection assembly 20 less, and consequently the air outlet device 30 can protrude downward from the smoke collection assembly 20 less, which is beneficial to the consistency and aesthetics of the appearance of the smoke machine 1.

[0043] In some embodiments, the range hood 1 further includes an oil cup 40, which is installed in the smoke collection chamber near the front panel 21. In this embodiment, unlike range hoods in related technologies, the oil cup 40 is located in the smoke collection chamber near the front side.

[0044] Specifically, the oil cup 40 is slidably disposed in the first direction for installation or removal. The user can pull the oil cup 40 out from the front end of the smoke collection assembly 20. This connection method is highly reliable, convenient to handle and install, and has low cost. Optionally, the side of the oil cup 40 facing the smoke collection chamber can have a guide slope, which can better deliver the flue gas to the air inlet 231. An air outlet device 30 is provided on at least one side of the oil cup 40 in the third direction. The air outlet devices 30 are disposed on both sides of the oil cup 40, allowing their placement to match the position of the oil cup 40, thus giving the front end of the smoke collection chamber a more regular structure without affecting the functionality of the oil cup 40 and the air outlet device 30. For example, when the smoke collection assembly 20 is also provided with a side plate, the two sides of the oil cup 40 and the side plate can be respectively formed with installation space, and the air outlet device 30 can be installed in the installation space. In this way, the oil cup 40 and the air outlet device 30 are installed without affecting their own functions, with less impact on the spatial structure of the smoke collection chamber, and are more aesthetically pleasing.

[0045] Furthermore, the oil cup 40 is detachably mounted on the front panel 21, and the oil cup 40 is located on the side of the front panel 21 near the rear panel 22. In this way, the oil cup 40 can be hidden behind the front panel 21, which is beneficial to the consistency and aesthetics of the range hood 1. Optionally, the oil cup 40 can also be located on the side of the front panel 21 facing away from the frame 10 in a second direction, that is, located below the front panel 21.

[0046] In some embodiments, the air outlet 34 has a component in a third direction that is away from the air inlet 231. In other words, the air outlet 34 is directed not only to the rear but also to the outside. By setting the air outlet 34 to be directed outward, the amount of air from the air outlet 30 blowing towards the air inlet 231 can be reduced, thereby reducing the impact of the air outlet 30 on the air intake at the air inlet 231 and achieving the purpose of controlling the air outlet 30 to prevent undesirable interference with flue gas discharge.

[0047] Combination Figures 9 to 13 In some embodiments, at least a portion of the edge of the air outlet 34 on the side furthest from the air inlet 231 in the third direction is closer to the front than the edge of the air outlet 34 on the side closer to the air inlet 231 in the third direction. In other words, the outer edge of the air outlet 34 is further forward than the inner edge, thereby reducing the airflow from the air outlet 34 toward the air inlet 231. In this manner, at least the airflow toward the air inlet 231 can be blocked by the more rearward edge of the air outlet 34. Optionally, the dimension of the inner sidewall of the air outlet device 30 corresponding to the air outlet 34 in the first direction is larger than the dimension of the outer sidewall of the air outlet device 30 corresponding to the air outlet 34 in the first direction.

[0048] In some embodiments, the edge of the air outlet 34 on the side away from the air inlet 231 in the third direction has a first segment close to the smoke collection assembly 20 and a second segment away from the smoke collection assembly 20 in the second direction, with the second segment being closer to the front than the first segment. In other words, the outer edge of the air outlet 34 may not all be closer to the front; a portion of the outer edge of the air outlet 34 may be flush with the inner edge of the air outlet 34 in the third direction. In this way, the air outlet 34 can have an outward component in its airflow, while the appearance of the air outlet device 30 can match the oil cup 40 and the side panel, enhancing aesthetics.

[0049] In some embodiments, in the third direction, the distance between the edge of the air outlet 34 away from the air inlet 231 and the edge of the air outlet 34 near the air inlet 231 is less than or equal to 25 mm. In other words, the width of the air outlet 34 in the third direction is less than or equal to 25 mm. For example, 20 mm, 15 mm, 10 mm, or 5 mm. If the width of the air outlet 34 in the third direction is too large, it will cause the airflow to dissipate to both sides in the third direction, which will disrupt the original flow field structure of the smoke collection chamber and reduce the smoke extraction effect.

[0050] In some embodiments, the air outlet 34 does not have a forward component in the first direction. In this embodiment, it is necessary to draw the flue gas backward. If the air outlet 30 located at the front has a forward component in its air outlet direction, it will cause the flue gas to be blown forward, resulting in forward dispersion.

[0051] In some embodiments, the air outlet 34 does not have a component pointing towards the air inlet 231 in the third direction. Smoke needs to enter the smoke hood 1 from the air inlet 231 and then be discharged. If the air outlet 30 has a component pointing towards the air inlet 231, it will affect the smoke extraction effect at the air inlet 231.

[0052] Combination Figure 10 In some embodiments, the air outlet 34 has at least a component in the air outlet direction that is towards the rear and a component in the second direction that is away from the frame 10. In other words, the air outlet 34 is oriented towards the rear and downward. The downward component of the air outlet 34 can form an air curtain on both sides below the range hood 1 in the third direction. The air curtain formed by the air outlet device 30 can block the sides, thereby reducing the air supply from both sides to the central air inlet 231 during the smoke exhaust process. When the suction power of the range hood 1 is consistent, the reduction in air supply from the third direction will increase the air supply from the sides in the first direction. For the front side of the range hood 1, the increase in air supply from the front side can promote the movement of the smoke from the front side towards the rear side, thereby optimizing the smoke extraction effect of the range hood 1. Furthermore, when the range hood 1 is installed on a wall, the rear wall will also block the rear air supply, thus further increasing the air supply from the front side, thereby further promoting the rearward movement of the smoke from the front side. The rearward component of the air outlet 34, through shear force, attracts the airflow to flow backward, thus creating a rearward guiding effect on the smoke. Simultaneously, it directs the airflow towards the wall, generating a wall-attached airflow at the front, further deflecting the airflow closer to the wall and optimizing the smoke extraction effect. In this embodiment, the air outlet 30 is located in the smoke collection chamber near the front.

[0053] In some embodiments, the component of the air outlet 34 in the second direction away from the frame 10 is greater than the component of the air outlet 34 in the rearward direction. In other words, the angle between the air outlet 34 and the second direction is smaller than the angle between the air outlet 34 and the first direction. In this way, the air outlet 34 can be directed downward and backward from the air outlet device 30. Thus, while the air outlet device 30 forms an air curtain to provide a shielding effect, it can reduce the amount of air directly blown onto the cooktop surface, thereby reducing the impact of the air outlet device 30 on the operation of the cooktop.

[0054] In some embodiments, the angle between the plane containing the air outlet 34 and the first direction is greater than 0 degrees and less than or equal to 30 degrees. If the angle between the plane containing the air outlet 34 and the first direction is less than or equal to 0 degrees, the airflow from the air outlet 34 is unlikely to generate a backward component. If the angle between the plane containing the air outlet 34 and the first direction is greater than 30 degrees, the backward component of the airflow from the air outlet 34 becomes larger and the downward component becomes smaller, which can easily lead to the air curtain generated by the air outlet device 30 failing to provide effective shielding.

[0055] In some embodiments, the length of the air outlet 34 in the first direction is less than the length of the air inlet 231 in the first direction. The air outlet 34 can be arranged in an elongated shape, thereby more easily forming an air curtain to provide a shielding effect.

[0056] Specifically, in some embodiments, the length of the air outlet 34 in the first direction is between 100 mm and 125 mm. In some embodiments, in the third direction, the distance between the edge of the air outlet 34 away from the air inlet 231 and the edge of the air outlet 34 near the air inlet 231 is less than or equal to 4 mm.

[0057] In some embodiments, the air outlet device 30 includes a first sidewall 31 near the rear side in a first direction, and the end of the first sidewall 31 near the frame 10 in a second direction is closer to the front side than the end of the first sidewall 31 away from the frame 10 in a second direction. In other words, the first sidewall 31 near the rear side of the air outlet device 30 is inclined and extends rearward in the direction away from the frame 10 in a second direction. In this way, the flow loss of airflow inside the air outlet device 30 can be reduced, and the flow rate of the air outlet 34 near the rear side can be increased. The first sidewall 31 can guide the gas inside the air outlet device 30, reduce the obstruction of airflow inside the air outlet device 30, and smoothly guide the gas to the air outlet 34 for discharge. Optionally, the first sidewall 31 may have an upper first portion and a lower second portion in the second direction. The end of the first portion near the frame 10 in the second direction is closer to the front side than the end of the portion away from the frame 10 in the second direction, and the second portion is located on the side of the first portion near the rear side in the first direction.

[0058] In some embodiments, the air outlet device 30 further includes a second sidewall 32 and a third sidewall 33 spaced apart in a third direction. The first sidewall 31, second sidewall 32, and third sidewall 33 enclose an air outlet 34. The distance between the second sidewall 32 and the third sidewall 33 of the air outlet device 30 in the second direction near the frame 10 is greater than the distance between the second sidewall 32 and the third sidewall 33 of the air outlet device 30 in the second direction away from the frame 10. In other words, the dimension of the upper portion of the air outlet device 30 in the third direction is greater than the dimension of the lower portion of the air outlet device 30 in the third direction. This reduces the flow resistance inside the air outlet device 30, achieving a larger air volume under the same conditions.

[0059] Specifically, in the second direction, the second sidewall 32 has a first sub-sidewall close to the smoke collecting assembly 20 and a second sub-sidewall away from the smoke collecting assembly 20. The distance between the first sub-sidewall and the third sidewall 33 is greater than the distance between the second sub-sidewall and the third sidewall 33. Optionally, in the second direction, the third sidewall 33 has a third sub-sidewall close to the smoke collecting assembly 20 and a fourth sub-sidewall away from the smoke collecting assembly 20. The distance between the third sub-sidewall and the second sidewall 32 is greater than the distance between the fourth sub-sidewall and the third sidewall 33.

[0060] In some embodiments, the edge of the air outlet 34 on the side away from the air inlet 231 in a third-direction upward direction is at least partially closer to the front in a first direction and closer to the frame 10 in a second direction than the edge of the air outlet 34 on the side closer to the air inlet 231 in a third-direction upward direction. In other words, the outer edge of the air outlet 34 is further forward and higher than the inner edge, thereby reducing the airflow from the air outlet 34 toward the air inlet 231. In this manner, at least the airflow toward the air inlet 231 can be blocked by the more rearward and lower inner edge of the air outlet 34. Optionally, the dimension of the inner sidewall of the air outlet device 30 corresponding to the air outlet 34 is larger in the first or second direction than the outer sidewall of the air outlet device 30 corresponding to the air outlet 34.

[0061] Combination Figure 12 and Figures 14 to 18 In some embodiments, the air outlet 34 is provided with a guide structure 35 near the front edge in a first direction. The guide structure 35 extends from the air outlet 34 near the front edge in a first direction toward the rear. By providing the guide structure 35, the airflow near the front part of the air outlet 34 can be blocked and guided, thereby further directing the airflow of the air outlet 34 toward the rear.

[0062] In some embodiments, the air outlet velocity of the air outlet 34 satisfies the following condition: in a first direction, from the front to the rear, the air outlet velocity of the air outlet 34 gradually decreases and then gradually increases. In other words, along the length of the air outlet 34, the air outlet velocity is distributed with a higher velocity at both ends and a lower velocity in the middle. In this way, the higher air outlet velocity at both ends and the lower air outlet velocity in the middle can form two vortices on the side of the range hood 1. In this embodiment, the air outlet device 30 is located at the front, and the vortex can attract the smoke from the front to move towards the rear, thereby improving the smoke extraction effect of the range hood 1.

[0063] In some embodiments, the air outlet 34 does not have a forward component in the first direction. In this embodiment, it is necessary to draw the flue gas backward. If the air outlet 30 located at the front has a forward component in its air outlet direction, it will cause the flue gas to be blown forward, resulting in forward dispersion.

[0064] In some embodiments, the air outlet 34 does not have a component pointing towards the air inlet 231 in the third direction. Smoke needs to enter the smoke hood 1 from the air inlet 231 and then be discharged. If the air outlet 30 has a component pointing towards the air inlet 231, it will affect the smoke extraction effect at the air inlet 231.

[0065] In some embodiments, the air outlet 34 does not have a component pointing towards the frame 10 in the second direction. In this embodiment, air curtains need to be formed on both sides of the smoke machine 1 to provide a shielding effect. The upward air outlet component of the air outlet 34 will affect the formation of the air curtain and is not conducive to improving the smoke extraction effect.

[0066] Combination Figure 19 In some embodiments, the air outlet 34 has at least a component in the second direction away from the frame 10, and the length of the air outlet 34 in the first direction is greater than the width of the air outlet 34 in the third direction. In other words, the air outlet 34 is elongated and blows downwards. The downward component of the air outlet 34 creates an air curtain on both sides below the range hood 1 in the third direction. The air curtain formed by the air outlet device 30 can shield both sides of the range hood 1, thereby reducing the amount of air supplied from both sides to the central air inlet 231 during smoke extraction. When the suction power of the range hood 1 is consistent, the reduced air supply in the third direction will increase the air supply in the first direction. For the front side of the range hood 1, the increased air supply can promote the movement of smoke from the front side towards the rear side, thus optimizing the smoke extraction effect of the range hood 1. Furthermore, when the range hood 1 is installed on a wall, the rear wall will also shield the rear air supply, further increasing the air supply from the front side and further promoting the rearward movement of smoke from the front side.

[0067] In some embodiments, the length of the air outlet 34 in the first direction is greater than or equal to the length of the air inlet 231 in the first direction. In other words, the projection of the air inlet 231 in the third direction is located within the range defined by the two ends of the projection of the air outlet 34 in the third direction. In this way, the air curtain formed by the air outlet device 30 can provide greater shielding on both sides of the smoke machine 1, thereby further reducing the air supply on both sides and promoting the increase of air supply on the front side, thus optimizing the smoking effect.

[0068] Optionally, in the third direction, the distance between the edge of the air outlet 34 away from the air inlet 231 and the edge of the air outlet 34 near the air inlet 231 is less than or equal to 4 mm. By setting the air inlet 231 to have a narrower width, the airflow from the air outlet 34 can have a higher speed and stronger directionality, thereby facilitating the formation of an air curtain.

[0069] In some embodiments, the air outlet velocity of the air outlet 34 satisfies the following condition: in a first direction, from the front to the rear, the air outlet velocity of the air outlet 34 gradually decreases and then gradually increases. In other words, along the length of the air outlet 34, the air outlet velocity is distributed with a larger velocity at both ends and a smaller velocity in the middle. In this way, the larger air outlet velocity at both ends and the smaller air outlet velocity in the middle can form two vortices on the side of the range hood 1. In this embodiment, the extension length of the air outlet device 30 is longer than that of the air inlet 231, and the vortex can attract the smoke from the front and rear sides towards the middle, thereby facilitating the discharge of smoke and improving the smoke extraction effect of the range hood 1.

[0070] In some embodiments, the air outlet 30 includes a first sidewall 31 near the rear in a first direction, and the end of the first sidewall 31 near the frame 10 in a second direction is closer to the front than the end of the first sidewall 31 away from the frame 10 in the second direction. In other words, the first sidewall 31 near the rear of the air outlet 30 is inclined forward in the direction away from the frame 10 in the second direction. In this way, the airflow near the rear of the air outlet 34 can be reduced, and the stability of the airflow can be increased.

[0071] In some embodiments, the air outlet device 30 further includes a second sidewall 32 and a third sidewall 33 spaced apart in a third direction. The first sidewall 31, second sidewall 32, and third sidewall 33 enclose an air outlet 34. The distance between the second sidewall 32 and the third sidewall 33 of the air outlet device 30 in the second direction near the frame 10 is greater than the distance between the second sidewall 32 and the third sidewall 33 of the air outlet device 30 in the second direction away from the frame 10. In other words, the dimension of the upper portion of the air outlet device 30 in the third direction is greater than the dimension of the lower portion of the air outlet device 30 in the third direction. This reduces the flow resistance inside the air outlet device 30, achieving a larger air volume under the same conditions.

[0072] In some embodiments, the air outlet 34 has a component in the third direction that is away from the air inlet 231. By setting the air outlet 34 to face outward, the amount of air from the air outlet 30 blowing towards the air inlet 231 can be reduced, thereby reducing the impact of the air outlet 30's airflow on the air inlet 231. Furthermore, the component of the air outlet 34's air outlet direction away from the frame 10 in the second direction is greater than the component of the air outlet 34's air outlet direction away from the air inlet 231 in the third direction. In this way, the air outlet 34's air outlet direction is still primarily downward, thus forming an air curtain to provide shielding.

[0073] In some embodiments, at least a portion of the edge of the air outlet 34 on the side away from the air inlet 231 in the third direction is closer to the frame 10 in the second direction than the edge of the air outlet 34 on the side closer to the air inlet 231 in the third direction. In other words, the outer edge of the air outlet 34 is higher than the inner edge, thereby reducing the airflow from the air outlet 34 toward the air inlet 231. In this manner, at least the higher edge of the air outlet 34 can block the airflow toward the air inlet 231. Optionally, the dimension of the inner sidewall of the air outlet device 30 corresponding to the air outlet 34 in the second direction is larger than the dimension of the outer sidewall of the air outlet device 30 corresponding to the air outlet 34 in the second direction.

[0074] In some embodiments, in a third direction, the distance between the edge of the air outlet 34 away from the air inlet 231 and the edge of the air outlet 34 near the air inlet 231 satisfies the condition that the distance near the front is greater than the distance near the rear. In other words, the width of the air outlet 34 near the front is greater than the width of the air outlet 34 near the rear. This distance change can be gradual or stepped, and is not specifically limited here. In this way, the velocity gradient of the air outlet 34 can be increased, thereby forming a stronger vortex and further realizing the rearward movement of the smoke from the front.

[0075] In some embodiments, the air outlet 34 does not have a forward component in the first direction. In this embodiment, it is necessary to draw the flue gas backward. If the air outlet 30 located at the front has a forward component in its air outlet direction, it will cause the flue gas to be blown forward, resulting in forward dispersion.

[0076] In some embodiments, the air outlet 34 does not have a component pointing towards the air inlet 231 in the third direction. Smoke needs to enter the smoke hood 1 from the air inlet 231 and then be discharged. If the air outlet 30 has a component pointing towards the air inlet 231, it will affect the smoke extraction effect at the air inlet 231.

[0077] In some embodiments, the air outlet 34 does not have a component pointing towards the frame 10 in the second direction. In this embodiment, it is necessary to form air curtains on both sides of the smoke machine 1 to provide a shielding effect, and the upward air outlet component of the air outlet 34 is not required to reduce the interference of air on the shielding effect of the air curtain.

[0078] Combination ​ In some embodiments, the air outlet 34 has a component in the second direction that is away from the frame 10, and a component in the third direction that is towards the air inlet 231. The air outlet device 30 is disposed in the portion of the smoke collection assembly 20 near the rear. In this embodiment, the air outlet 34 is oriented downwards and inwards. When the air outlet device 30 is disposed near the rear, the air outlet 34's airflow is directed inwards and downwards, which can create a wall-attached airflow near the wall, thereby attracting smoke to move towards the wall and thus optimizing the smoke extraction effect.

[0079] In some embodiments, the air outlet 34 includes a first air outlet 34 and a second air outlet 34. The first air outlet 34 faces away from the frame 10, and the second air outlet 34 faces towards the air inlet 231. Two air outlets 34 are provided, one facing downwards and the other facing inwards. The first air outlet 34 and the second air outlet 34 are connected. This method allows for the formation of a large area of ​​wall-attached airflow near the wall and reduces interference between the inward-facing and downward-facing airflows.

[0080] In some embodiments, the air outlet 34 has a rearward component in its air outlet direction. In this way, the air outlet direction can be deflected from the front of the air outlet device 30, thereby reducing the interference of the air outlet 30's air outlet on the flow field structure at the front of the air outlet device 30, and reducing the interference of the air outlet 30's air outlet on the air inlet 231.

[0081] In some embodiments, in the third direction, the end of the air outlet 34 near the air inlet 231 is closer to the frame 10 than the end of the air outlet 34 away from the air inlet 231. In other words, the air outlet 34 can be set at an angle to both the second direction and the third direction, so that one air outlet 34 can simultaneously generate airflow toward the inward and downward directions.

[0082] In some embodiments, the front edge of the air outlet 34 is further away from the frame 10 in the second direction than the rear edge of the air outlet 34. In other words, the front edge of the air outlet 34 is lower than the rear edge, thereby reducing the airflow from the air outlet 34 toward the air inlet 231. In this manner, at least the airflow toward the air inlet 231 can be blocked by the front edge of the air outlet 34. Optionally, the dimension of the front sidewall of the air outlet device 30 corresponding to the air outlet 34 in the second direction is larger than the dimension of the rear sidewall of the air outlet device 30 corresponding to the air outlet 34 in the second direction.

[0083] In some embodiments, the air outlet 34 does not have a forward component in the first direction. In this embodiment, the air outlet device 30 is located at the rear, and the forward component of the air outlet device 30 will significantly interfere with the smoke extraction at the air inlet 231 and the flow field structure below the smoke machine 1.

[0084] In some embodiments, the air outlet 34 does not have a component in the third direction that deviates from the air inlet 231. In this embodiment, it is necessary to form a wall-attached airflow on the wall to draw the smoke backward. The air outlet 34 is oriented outward, and the wall-attached airflow it generates is also located on the outer side, which cannot effectively attract the smoke in front of the range hood 1. In some embodiments, the air outlet 34 does not have a component in the second direction that faces the frame 10.

[0085] In some embodiments, the operation of the air outlet devices 30 on both sides of the air inlet 231 can correspond to the user's cooking process. For example, the range hood 1 can identify the side with more smoke or the side mainly used by the user through methods such as range hood-cooker linkage, temperature probe, image recognition, and smoke detection, and activate the corresponding air outlet device 30. Optionally, the user can manually operate the air outlet device 30 through a mobile application or the control panel on the range hood 1.

[0086] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A range hood, characterized in that, The range hood has a front side and an opposite rear side in a first direction, including: frame; A smoke collection assembly is mounted on the frame, and the frame and the smoke collection assembly are arranged in a second direction. The smoke collection assembly has an air inlet for drawing in smoke. The smoke collection assembly includes a smoke extraction plate, a front plate, and a rear plate. In a first direction, the front plate is located in front of the smoke extraction plate, and the rear plate is located behind the smoke extraction plate. The air inlet is provided on the smoke extraction plate. The smoke extraction plate, the front plate, and the rear plate surround and form a smoke collection chamber facing away from the frame in the second direction. In the second direction, the end of the smoke extraction plate near the front plate is located away from the frame compared to the end of the smoke extraction plate near the rear plate. An air outlet is provided on the side of the smoke plate away from the frame; it has an air outlet in a third direction, and the air outlet is provided on at least one side of the air inlet. The air outlet is used to promote the movement of smoke toward the rear side, and the third direction is perpendicular to the first direction and the second direction.

2. The range hood according to claim 1, characterized in that: The air outlet device is located in the portion of the smoke collection chamber near the front side, and the air outlet has at least a component pointing towards the rear side.

3. The range hood according to claim 2, characterized in that: The range hood also includes an oil cup, which is installed in the smoke collection chamber near the front panel, and the air outlet device is provided on at least one side of the oil cup in the third direction.

4. The range hood according to claim 2, characterized in that: The air outlet has a component in the third direction that is away from the air inlet; the edge of the air outlet in the third direction that is away from the air inlet is closer to the front side than the edge of the air outlet in the third direction that is closer to the air inlet.

5. The range hood according to claim 2, characterized in that: In the second direction, the distance between the end of the air outlet near the smoke collection assembly and the smoke extraction plate is less than or equal to 25 mm; In the second direction, the distance between the end of the air outlet away from the smoke collection assembly and the end face of the front plate away from the frame is less than or equal to 15mm; In the third direction, the distance between the edge of the air outlet away from the air inlet and the edge of the air outlet near the air inlet is less than or equal to 25mm.

6. The range hood according to claim 1, characterized in that: The air outlet device is disposed in the portion of the smoke collection chamber near the front side, and the air outlet has at least a component toward the rear side and a component away from the frame in a second direction.

7. The range hood according to claim 6, characterized in that: The component of the air outlet's airflow direction away from the frame in the second direction is greater than the component of the air outlet's airflow direction towards the rear.

8. The range hood according to claim 6, characterized in that: The angle between the plane where the air outlet is located and the first direction is greater than 0 degrees and less than or equal to 30 degrees; In the third direction, the distance between the edge of the air outlet away from the air inlet and the edge of the air outlet near the air inlet is less than or equal to 4 mm.

9. The range hood according to claim 6, characterized in that: The air outlet device includes a first sidewall near the rear side in a first direction, and the end of the first sidewall near the frame in a second direction is closer to the front side than the end of the first sidewall away from the frame in a second direction.

10. The range hood according to claim 6, characterized in that: The air outlet has a flow guiding structure at its edge near the front side in a first direction, and the flow guiding structure extends from the air outlet towards the rear side in a first direction at its edge near the front side in a first direction.

11. The range hood according to claim 1, characterized in that: The air outlet device is disposed in the portion of the smoke collection chamber near the front side, and the air outlet has at least one component in the second direction that is away from the frame. The length of the air outlet in the first direction is greater than the width of the air outlet in the third direction.

12. The range hood according to claim 11, characterized in that: The length of the air outlet in the first direction is greater than or equal to the length of the air inlet in the first direction.

13. The range hood according to claim 11, characterized in that: The air outlet device includes a first sidewall near the rear side in a first direction, and the end of the first sidewall near the frame in a second direction is further away from the front side than the end of the first sidewall away from the frame in a second direction.

14. The range hood according to claim 11, characterized in that: The air outlet's airflow direction has a component in the third direction that is away from the air inlet direction, and the component of the air outlet's airflow direction away from the frame in the second direction is greater than the component of the air outlet's airflow direction away from the air inlet direction in the third direction.

15. The range hood according to claim 11, characterized in that: The air outlet velocity satisfies the following condition: in the first direction, from the front side to the rear side, the air outlet velocity gradually decreases and then gradually increases.

16. The range hood according to claim 11, characterized in that: In the third direction, the distance between the edge of the air outlet away from the air inlet and the edge of the air outlet near the air inlet, the portion closer to the front side, is greater than the distance closer to the rear side.

17. The range hood according to claim 1, characterized in that: The air outlet has an air outlet direction that has a component away from the frame direction in the second direction, and a component that has a component towards the air inlet in the third direction. The air outlet device is located on the portion of the smoke collection assembly near the rear side.

18. The range hood according to claim 17, characterized in that: The air outlet has an airflow direction that also has a component toward the rear side; the edge of the air outlet near the front side is further away from the frame in a second direction than the edge of the air outlet near the rear side.

19. The range hood according to any one of claims 1-18, characterized in that: On the third-party side, at least one air outlet device is provided on each side of the air inlet.

20. The range hood according to any one of claims 1-18, characterized in that: The distance between the side of the frame facing the front and the side of the front plate facing the front in the first direction is less than or equal to 15 mm.

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