Range hood

Abstract

The invention discloses a range hood. The range hood comprises an exhaust fume collecting hood, the exhaust fume collecting hood comprises a first fume suction plate, the first fume suction plate is provided with a plurality of front air inlets communicated with a containing cavity and a plurality of rear air inlets communicated with the containing cavity, the front air inlets are located in the front side of the first fume suction plate, and the rear air inlets are located in the rear side of the first fume suction plate; among the multiple rear air inlets, the area of the front air inlet located in the middle of the first smoke suction plate is larger than that of the front air inlets located in the two ends of the first smoke suction plate, and / or the area of the rear air inlet located in the middle of the first smoke suction plate is smaller than that of the rear air inlets located in the two ends of the first smoke suction plate. And / or at least one rear air inlet is provided with a rear guide vane. The range hood disclosed by the invention has a relatively good smoke suction effect.

Description

Technical Field

[0001] This application relates to the technical field of household appliances, and particularly to a range hood. Background Art

[0002] A range hood, also known as an extractor hood, is a kitchen appliance for purifying the kitchen environment. Generally, a household range hood is installed above a kitchen stove. It can quickly extract the waste generated by the stove combustion and the harmful fumes produced during the cooking process, discharge them outdoors, and at the same time condense and collect the fumes, reduce pollution, purify the air, and also has the safety protection functions of preventing poisoning and explosion.

[0003] The smoking effect of traditional European-style range hoods is generally positively correlated with the smoke collection area of the body. To ensure the smoking effect, the thickness of the hood head is generally increased to increase the smoke collection area. However, this method will occupy the front and rear space and is easy to hit the head. Summary of the Invention

[0004] This application provides a range hood that can improve the smoking effect of the range hood through the design of the air inlet flow channel of the range hood.

[0005] To solve the above technical problems, one technical solution adopted in this application is: providing a range hood, which includes: a smoke collecting hood, the smoke collecting hood forms a receiving cavity, the smoke collecting hood includes a first smoking plate, the first smoking plate is provided with a plurality of front air inlets communicated with the receiving cavity and a plurality of rear air inlets communicated with the receiving cavity, the plurality of front air inlets are located on the front side of the first smoking plate, the plurality of rear air inlets are located on the rear side of the first smoking plate, wherein, the front side of the first smoking plate is the side close to the user, the rear side of the first smoking plate faces away from the front side of the first smoking plate, among the plurality of front air inlets, the area of the front air inlet located in the middle position of the first smoking plate is larger than the area of the front air inlets located at both ends of the first smoking plate, and / or, among the plurality of rear air inlets, the area of the rear air inlet located in the middle position of the first smoking plate is smaller than the area of the rear air inlets located at both ends of the first smoking plate; at least one front air inlet is provided with a front guide vane, one end of each front guide vane is connected to the end of the corresponding front air inlet far from the middle position of the first smoking plate, and the other end of the front guide vane extends towards the receiving cavity; and / or, at least one rear air inlet is provided with a rear guide vane, one end of the rear guide vane is connected to the end of the rear air inlet far from the middle position of the first smoking plate, and the other end of the rear guide vane extends towards the receiving cavity.

[0006] In some specific embodiments, a plurality of front air inlets are arranged side by side along a first direction, and the areas of the plurality of front air inlets gradually decrease from the middle position of the first smoking plate to the two ends of the first smoking plate, and a plurality of rear air inlets are arranged side by side along the first direction, and the areas of the plurality of rear air inlets gradually increase from the middle position of the first smoking plate to the two ends of the first smoking plate, wherein the first direction is perpendicular to the spacing direction between the front side and the rear side of the first smoking plate.

[0007] In some specific embodiments, a line connecting ends of the plurality of front air inlets facing away from the rear air inlet is parallel to the first direction.

[0008] In some specific embodiments, a line connecting ends of the plurality of rear air inlets facing away from the front air inlet is parallel to the first direction.

[0009] In some specific embodiments, the plurality of front air inlets include a plurality of first front air inlets and a plurality of second front air inlets that are spaced apart from each other, and the plurality of rear air inlets include a plurality of first rear air inlets and a plurality of second rear air inlets that are spaced apart from each other.

[0010] In some specific embodiments, the angle between the leading guide vane and the plane where the front air inlet is located is α, where 45°≤α≤90°, and the angle between the trailing guide vane and the plane where the trailing air inlet is located is β, where 45°≤β≤90°.

[0011] In some specific embodiments, the ratio of the area of ​​the orthographic projection of each leading guide vane on the plane where the corresponding front air inlet is located to the area of ​​the corresponding front air inlet is less than 0.5, and the ratio of the area of ​​the orthographic projection of each rear guide vane on the plane where the corresponding rear air inlet is located to the area of ​​the corresponding rear air inlet is less than 0.5.

[0012] In some specific embodiments, the smoke collecting hood has a front side facing the user and a rear side arranged opposite to the front side, and the distance between the first smoking plate and the stove top gradually increases from the front side to the rear side of the smoke collecting hood.

[0013] In some specific embodiments, the range hood also includes a second smoking plate, which is arranged side by side with the first smoking plate and is spaced apart from each other, the second smoking plate is arranged in the accommodating cavity, the second smoking plate is provided with a plurality of first inner air inlets connected to the accommodating cavity and a plurality of second inner air inlets connected to the accommodating cavity, the plurality of first inner air inlets are located on the front side of the second smoking plate, and the plurality of second inner air inlets are located on the rear side of the second smoking plate; the plurality of first inner air inlets are staggered with the plurality of front air inlets, and the plurality of second inner air inlets are staggered with the plurality of rear air inlets.

[0014] In some specific embodiments, the distance between the first smoking plate and the second smoking plate is d, wherein 12 mm≤d≤20 mm.

[0015] Advantages of the present application: Different from the prior art, the range hood provided by the present application includes: a smoke collecting hood, which forms a receiving cavity. The smoke collecting hood includes a first smoke suction plate. The first smoke suction plate is provided with a plurality of front air inlets communicating with the receiving cavity and a plurality of rear air inlets communicating with the receiving cavity. The plurality of front air inlets are located on the front side of the first smoke suction plate, and the plurality of rear air inlets are located on the rear side of the first smoke suction plate. Among them, the front side of the first smoke suction plate is the side close to the user, and the rear side of the first smoke suction plate faces away from the front side of the first smoke suction plate. Among the plurality of front air inlets, the area of the front air inlet located in the middle position of the first smoke suction plate is larger than the area of the front air inlets located at both ends of the first smoke suction plate, and / or, among the plurality of rear air inlets, the area of the rear air inlet located in the middle position of the first smoke suction plate is smaller than the area of the rear air inlets located at both ends of the first smoke suction plate. At least one front air inlet is provided with a front guide vane. One end of each front guide vane is connected to one end of the corresponding front air inlet far from the middle position of the first smoke suction plate, and the other end of the front guide vane extends into the receiving cavity; and / or, at least one rear air inlet is provided with a rear guide vane. One end of the rear guide vane is connected to one end of the rear air inlet far from the middle position of the first smoke suction plate, and the other end of the rear guide vane extends into the receiving cavity. The range hood provided by the present application is provided with air inlets on both the front side and the rear side of the first smoke suction plate, which increases the smoke inlet area and improves the smoking effect. Moreover, when the middle of the front air inlet is large and the two sides are small, the utilization efficiency of the air flow can be improved, the pressure on the front side can be moved forward as much as possible, and the escaped smoke on the front side can be reduced. When the middle of the rear air inlet is large and the two sides are small, the pressure can be distributed to the left and right sides to correspond to the position of the cooking pot, and the directional pressure radiation and flow enhancement on the left and right sides can be realized to achieve a better smoking effect on both sides. In addition, the range hood of the present application can guide the smoke by arranging the front guide vane and / or the rear guide vane, and guide the air flow to enter the air duct in a more orderly direction, so as to further improve the smoking effect of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of an embodiment of the range hood provided by the present application; Figure 2 is Figure 1 a schematic structural diagram of another perspective of the range hood shown; Figure 3 is Figure 2 a schematic structural diagram of the first smoke suction plate of the range hood in; Figure 4 isFigure 3 Schematic enlarged structure diagram at the middle circle A; Figure 5 It is Figure 1 Schematic structure diagram of an embodiment of the oil storage tank of the range hood shown. Specific embodiments

[0018] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0019] The terms "first", "second", etc. in the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0020] Referring to "embodiment" herein means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0021] The purpose of the range hood design is to collect and discharge the cooking fumes from the kitchen. Its main working principle is: by exhausting the air in the kitchen, the fumes are driven to flow with the exhausted air, and thus are collected and discharged from the kitchen through the range hood.

[0022] The present application proposes a new form of range hood. There is a front air inlet at the front side of the smoke suction plate of the range hood, and a rear air inlet at the rear side. The structure of the front air inlet is wider in the middle and narrower on both sides, which can further move the front inlet pressure forward and reduce the escaping fumes at the front side. The rear air inlet at the rear side is narrower in the middle and wider on both sides, which can distribute the pressure to both left and right sides to correspond to the position of the cookware during cooking. The range hood of the present application has a good oil suction effect. The following will introduce in detail the structure of the range hood provided by the present application.

[0023] Please refer toFigure 1 As shown Figure 1 is a schematic structural diagram of an embodiment of the range hood provided by the present application. Specifically, the range hood 10 includes a smoke collecting hood 100 and a blower 20.

[0024] The smoke collecting hood 100 forms a receiving cavity 301. The smoke collecting hood 100 may include a front plate 30, a rear plate 50, and side plates 40. One end of the side plate 40 is connected to the front plate 30, and the other end of the side plate 40 is connected to the rear plate 50. The front plate 30, the rear plate 50, and the side plates 40 enclose to form the receiving cavity 301. The receiving cavity 301 is a part of the air duct of the range hood 10. A blower 20 is provided in the air duct, and a check valve may be provided at the rear end of the blower 20 to communicate with the rear exhaust pipe. Referring again to Figure 2 As shown Figure 2 is Figure 1 a schematic structural diagram of another perspective of the range hood shown. The smoke collecting hood 100 further includes a first smoke suction plate 101. The first smoke suction plate 101 is provided with a plurality of front air inlets 11 communicating with the receiving cavity 301 and a plurality of rear air inlets 12 communicating with the receiving cavity 301. The plurality of front air inlets 11 are located on the front side of the first smoke suction plate 101, and the plurality of rear air inlets 12 are located on the rear side of the first smoke suction plate 101. Among them, the front side of the first smoke suction plate 101 faces the user, and the rear side of the first smoke suction plate 101 faces away from the user.

[0025] Under the action of the blower 20, negative pressure is generated at the front air inlets 11 and the rear air inlets 12 to extract the flue gas through the receiving cavity 301. The setting of the blower 20 is within the scope that those skilled in the art can understand, and will not be specifically described here.

[0026] The plurality of front air inlets 11 are located on the front side of the first smoke suction plate 101, and the plurality of rear air inlets 12 are located on the rear side of the first smoke suction plate 101. By providing two air inlets, both air inlets can be used for smoke intake, which can make the ventilation area of the range hood larger, thereby improving the smoking effect of the range hood 10. In Figure 2 the embodiment shown, among the plurality of front air inlets 11, the area of the front air inlet 11 located in the middle position of the first smoke suction plate 101 is larger than the area of the front air inlets 11 located at both ends of the first smoke suction plate 101. In this way, the utilization efficiency of the air flow can be improved, the inlet pressure at the front side can be further shifted forward, the flue gas escaping from the front side can be reduced, and the influence of the flue gas on the user at the front side can be reduced. Among the plurality of rear air inlets 12, the area of the rear air inlet 12 located in the middle position of the first smoke suction plate 101 is smaller than the area of the rear air inlets 12 located at both ends of the first smoke suction plate 101. In this way, the pressure can be distributed to the left and right sides to correspond to the position of the cookware during cooking, so as to suck the flue gas generated by the cookware on both sides more quickly and improve the smoking effect.

[0027] In the above embodiments, the middle of the front air inlet 11 of the range hood 10 is wide and the two sides are narrow, while the middle of the rear air inlet 12 is narrow and the two sides are wide. In this way, the flue gas escaping from the front side can be reduced, and the flue gas generated by the cookware on both sides can be sucked more quickly, improving the smoking effect of the range hood 10.

[0028] It can be understood that, in some embodiments, the front air inlet 11 of the range hood 10 can be set to be large in the middle and small on both sides, and the middle and both ends of several rear air inlets 12 are of equal size to reduce the escape of the front-side flue gas. In other embodiments, several front air inlets 11 can also be set to be of equal size in the middle and at both ends, and several rear air inlets 12 are large in the middle and small on both sides, so that the pressure is distributed to the left and right sides to correspond to the positions of the cookware during cooking, and the flue gas generated by the cookware on both sides can be sucked more quickly.

[0029] As Figure 1 shown, the smoke collecting hood 100 has a front side facing the user and a rear side opposite to the front side. As Figure 1 shown, in the direction from the front side to the rear side of the smoke collecting hood 100, the distance between the first smoking plate 101 and the cooktop gradually increases. In the installed state of the range hood 10, the rear side of the first smoking plate 101 is close to the wall, and the front side of the first smoking plate 101 is close to the user. Different from the existing range hoods where the included angle between the smoking surface and the wall is an obtuse angle, in this application, the included angle between the first smoking plate 101 of the range hood 10 and the wall is an acute angle.

[0030] Under the action of negative pressure, the flue gas enters the air duct through the front air inlet 11 and the rear air inlet 12. In this application, the first smoking plate 101 is reversely inclined compared with the existing range hoods. In this way, the pressure radiation direction of the range hood 10 can be optimized, and the area of the negative pressure zone can be increased. When the smoking plate is positively inclined, the negative pressure area is small. Therefore, in order to achieve the predetermined smoking effect, the range hood needs to be designed with a larger volume. When the first smoking plate 101 is reversely inclined, the negative pressure area is large. Therefore, the volume of the range hood 10 can be designed to be smaller.

[0031] In the above embodiments, the first smoking plate 101 of the range hood 10 is arranged in an inverted manner (lower in the front and higher in the rear), which can optimize the negative pressure radiation direction of the range hood 10, thereby increasing the area of the negative pressure zone and improving the smoking effect of the range hood 10. In addition, in this way, the range hood 10 does not need to be provided with an opening and closing plate, which can reduce the thickness of the head of the smoke collecting hood 100, thereby reducing the volume of the range hood 10.

[0032] It can be understood that, in other embodiments, the first smoking plate 101 can also be positively inclined, that is, in the direction from the front side to the rear side of the smoke collecting hood 100, the distance between the first smoking plate 101 and the cooktop gradually decreases. In this way, it also has a good smoking effect.

[0033] Optionally, a plurality of front air inlets 11 are arranged side by side in the first direction X, which is perpendicular to the spacing direction between the front side and the rear side of the smoke collecting hood 100. In the direction from the middle position of the first smoking plate 101 to both ends of the first smoking plate 101, the areas of the plurality of front air inlets 11 gradually decrease. In this way, the space in front of the first smoking plate 101 can be utilized more reasonably, the pressure at the middle position of the front side can be increased, and the flue gas escaping from the front side of the range hood can be reduced.

[0034] Optionally, a plurality of rear air inlets 12 are arranged side by side in the first direction X. In the direction from the middle position of the first smoking plate 101 to both ends of the first smoking plate 101, the areas of the plurality of rear air inlets 12 gradually increase. In this way, the space at the rear side of the first smoking plate 101 can be utilized more reasonably, so that the pressure is distributed to the left and right sides to correspond to the position of the cooking pot, and the smoking effect is improved.

[0035] The connection line of the ends of the plurality of front air inlets 11 facing away from the rear air inlets 12 is parallel to the first direction X, and the connection line of the ends of the plurality of rear air inlets 12 facing away from the front air inlets 11 is parallel to the first direction X. In this way, the end of the air inlet can be better matched with the oil storage tank 200 for oil droplet collection, and moreover, the space of the first smoking plate 101 can be fully utilized to achieve a better smoking effect.

[0036] Preferably, the first smoking plate 101 has a center line, the center line of the first smoking plate 101 is parallel to the spacing direction between the front side and the rear side of the smoke collecting hood 100, the plurality of front air inlets 11 are symmetrically arranged with respect to the center line of the first smoking plate 101, and the plurality of rear air inlets 12 are symmetrically arranged with respect to the center line of the first smoking plate 101. In this way, the front air inlets and the rear air inlets on both sides can be symmetrically arranged, and the smoking on both sides can be uniform.

[0037] Specifically, as Figure 2 and Figure 3 shown, Figure 3 is Figure 2 a schematic structural diagram of the first smoking plate of the range hood in

[0038] Optionally, as Figure 3 andFigure 4 As shown Figure 4 is Figure 3 a schematic enlarged structure diagram at the position of circle A in [the figure], at least part of the front air inlet 11 may be provided with a front guide vane 113. One end of the front guide vane 113 is connected to one end of the corresponding front air inlet 11 away from the middle position of the first smoking plate 101, and the other end of the front guide vane 113 extends into the accommodation cavity 301. The front guide vane 113 can be used to guide the flue gas entering from the front air inlet 11.

[0039] The included angle between the front guide vane 113 and the plane where the corresponding front air inlet 11 is located is α, where 45° ≤ α ≤ 90°. In this way, it can not only ensure the ventilation area of the front air inlet 11, but also have a guiding effect on the flue gas.

[0040] In some embodiments, the front guide vane 113 is rotatably arranged on one side of the corresponding front air inlet 11 to adjust the opening angle of the front guide vane 113. For example, when the flue gas is large, the angle between the front guide vane 113 and the plane where the corresponding front air inlet 11 is located can be increased, and when the flue gas is small, the angle between the front guide vane 113 and the plane where the corresponding front air inlet 11 is located can be decreased. In this way, the front guide vane 113 can adapt to multiple scenarios of the range hood 10 in use.

[0041] At least one rear air inlet 12 is provided with a rear guide vane 123. One end of the rear guide vane 123 is connected to one end of the corresponding rear air inlet 12 away from the middle position of the first smoking plate 101, and the other end of the rear guide vane 123 extends into the accommodation cavity 301. The rear guide vane 123 can be used to guide the flue gas entering from the rear air inlet 12.

[0042] The included angle between the rear guide vane 123 and the plane where the corresponding rear air inlet 12 is located is β, where 45° ≤ β ≤ 90°. In this way, it can not only ensure the ventilation area of the front air inlet, but also have a guiding effect on the flue gas.

[0043] By setting the front guide vane 113 and the rear guide vane 123, the range hood 10 of the present application can guide the flue gas and guide the air flow to enter the air duct in a more orderly direction, so as to further improve the smoking effect of the range hood 10.

[0044] In some embodiments, the rear guide vane 123 is rotatably arranged on one side of the middle position of the rear air inlet 12 away from the first smoking plate 101. It is used to adjust the opening angle of the rear guide vane 123. For example, when the flue gas is large, the angle between the rear guide vane 123 and the plane where the corresponding rear air inlet 12 is located can be increased, and when the flue gas is small, the angle between the rear guide vane 123 and the plane where the corresponding rear air inlet 12 is located can be decreased. In this way, the rear guide vane 123 can adapt to multiple scenarios of the range hood 10 in use.

[0045] Furthermore, the ratio of the area of the orthographic projection of the leading guide vane 113 on the plane where the corresponding front air inlet 11 is located to the area of the front air inlet 11 is less than 0.5, and the ratio of the area of the orthographic projection of the trailing guide vane 123 on the plane where the corresponding rear air inlet 12 is located to the area of the rear air inlet 12 is less than 0.5. With the above setting method, both the ventilation areas of the front air inlet 11 and the rear air inlet 12 are guaranteed, and certain pressure radiation and diversion effects are also ensured.

[0046] Furthermore, as Figure 1 shown, the range hood 10 may further include a second smoke suction plate 102. The second smoke suction plate 102 is arranged side by side and spaced apart from the first smoke suction plate 101, and the second smoke suction plate 102 is disposed in the accommodation cavity 301. An inner air inlet (not labeled in the figure) communicating with the accommodation cavity is provided on the second smoke suction plate 102.

[0047] By providing two layers of smoke suction plates, the smoke suction efficiency and the net smoke suction rate can be greatly improved. Specifically, by providing a double-layer smoke suction plate, the range hood 10 can have a larger smoke gathering range. The first smoke suction plate 101 is closer to the cookware, and can intercept and guide the smoke preliminarily when the smoke is just generated. The second smoke suction plate 102 is located higher or further back, forming a wider "negative pressure area", which can effectively cover a larger cooking area and prevent the smoke from diffusing and escaping around during the rising process. Moreover, using a double-layer smoke suction plate can enable the range hood 10 to have a stronger smoke guiding ability: the design of the double-layer smoke suction plate can more effectively guide the smoke airflow to the core negative pressure area of the air suction port, improving the air suction and exhaust efficiency.

[0048] The inner air inlet includes a plurality of first inner air inlets (not shown in the figure) communicating with the accommodation cavity 301 and a plurality of second inner air inlets (not shown in the figure) communicating with the accommodation cavity 301. The plurality of first inner air inlets are located on the front side of the second smoke suction plate 102, and the plurality of second inner air inlets are located on the rear side of the second smoke suction plate 102; the plurality of first inner air inlets are arranged in an interleaved manner with the plurality of front air inlets 11, and the plurality of second inner air inlets are arranged in an interleaved manner with the plurality of rear air inlets 12. That is, the holes in the outer layer are blocked by the inner layer, and the holes in the inner layer are blocked by the outer layer. In this way, the oil droplets in the accommodation cavity 301 can be prevented from dripping from the air inlet.

[0049] The distance between the first smoke suction plate 101 and the second smoke suction plate 102 is d, where 12 mm ≤ d ≤ 20 mm. With the double-layer smoke suction plate structure, the risk of oil droplet dripping can be reduced.

[0050] Furthermore, as Figure 1 shown, the range hood 10 may further include an oil storage tank 200. The oil storage tank 200 is disposed on the front side of the first smoke suction plate 101 and the second smoke suction plate 102, and is used to collect the oil droplets on the smoke suction plates. The oil storage tank 200 is arranged on the front side for the convenience of the user to take.

[0051] The whole body of the range hood 10 can be hidden inside the cabinet, that is, the front panel 30, side panels 40, and rear panel 50 of the range hood 10 are all hidden inside the cabinet, and only the oil storage tank 200 is left outside to facilitate the user to remove the oil storage tank 200 to pour out the waste oil.

[0052] Optionally, the oil storage tank 200 can also be made into a lift type, and the entire range hood 10 (including the oil storage tank 200) can be completely embedded in the cabinet. When the oil storage tank 200 needs to be maintained, the oil storage tank 200 is lowered to improve the cleanliness of the kitchen.

[0053] Wherein, the oil storage tank 200 and the smoke collecting hood 100 can be slidably connected, and the user can draw out the oil storage tank 200 forward, backward, or downward from the smoke collecting hood 100. In other embodiments, the oil storage tank 200 can be snap-connected to the smoke collecting hood 100.

[0054] As Figure 5 shown, Figure 5 is Figure 1 a schematic structural view of an embodiment of the oil storage tank of the range hood shown. In some embodiments, the oil storage tank 200 can include a front side wall 21, a rear side wall 23, and a bottom wall 22. The front side wall 21 is connected to the front end of the bottom wall 22, the rear side wall 23 is connected to the rear end of the bottom wall 22, and the front side wall 21, the bottom wall 22, and the rear side wall 23 enclose to form an oil storage cavity 201.

[0055] In other embodiments, the oil storage tank 200 may not be provided with a bottom wall 22, and the oil storage tank 200 includes a front side wall 21 and a rear side wall 23 connected to the front side wall 21. The front side wall 21 and the rear side wall 23 enclose to form an oil storage cavity 201.

[0056] Optionally, in the direction from the front end to the rear end of the smoke collecting hood 100, the distance between the rear side wall 23 of the oil storage tank 200 and the cooking surface gradually increases, so that the rear side wall 23 can serve as a diversion surface to divert the flue gas to the front air inlet 11. Preferably, the angle between the rear side wall 23 and the horizontal plane can be less than or equal to 45 degrees.

[0057] In this application, the outer surface of the rear side wall 23 of the oil storage tank 200 can serve as a diversion surface for diverting the flue gas to the first smoke suction plate 101, so that the flue gas enters the air duct through the front air inlet 11 and the rear air inlet 12 of the first smoke suction plate 101. The oil storage tank 200 cooperates with the smoke collecting hood 100 to improve the smoke suction effect of the range hood 10.

[0058] The included angle between the rear side groove wall 23 and the horizontal plane is less than or equal to 45 degrees. The inclination degree of the rear side groove wall 23 is relatively large, which can transfer the negative pressure of the front air inlet 11 of the range hood 10 to a greater depth position, improving the smoking effect. At this time, since the air inlets at the same depth can provide the smoking effect at a deeper position, the depth of the oil storage cavity 201 can be larger than the conventional design, reducing the maintenance frequency of the user for the oil storage tank 200.

[0059] In the installed state of the range hood 10, the front side groove wall 21 of the oil storage tank 200 can be vertically arranged, and the bottom wall 22 can be horizontally arranged, so that the oil storage tank 200 can be received in the cabinet.

[0060] Furthermore, since the slope of the rear side groove wall 23 of the oil storage tank 200 is relatively large, the center of gravity may be located outside the oil storage tank 200 when the oil storage tank 200 is full. When the user places the oil storage tank 200 on the tabletop, it is easy to tip over, and the waste oil will overflow from the oil storage cavity. Therefore, as Figure 5 shown, in some embodiments, the oil storage tank 200 may further include a support frame 24, and the support frame 24 is connected to the rear side groove wall 23. In this way, the inclination angle naturally generated when the oil storage tank 200 is placed is small enough not to cause the waste oil in the oil storage cavity 201 to overflow.

[0061] In Figure 5 the shown embodiment, the oil storage tank 200 includes two support frames 24, and the two support frames 24 are arranged at intervals on the rear side groove wall 23 of the oil storage tank 200, so that the force on the oil storage tank 200 is more uniform. In other embodiments, the oil storage tank 200 may also include three support frames 24, etc., and can be specifically determined according to the length of the oil storage tank 200.

[0062] In Figure 5 the shown embodiment, the shape of the support frame 24 is a triangular prism structure. Specifically, the support frame 24 includes a first side surface 241, a second side surface 242, and a third side surface 243. One end of the second side surface 242 is connected to one end of the first side surface 241, the other end of the second side surface 242 is connected to one end of the third side surface 243, and the other end of the third side surface 243 is connected to the other end of the first side surface 241. In this way, the structure of the support frame 24 is simple, the volume is small, the influence of the support frame 24 on the flow guiding of the rear side groove wall 23 of the oil storage tank 200 is reduced, and the oil storage tank 200 can be stably supported.

[0063] When the support frame 24 is in the supporting state, the second side surface 242 of the oil storage tank 200 can be flush with the bottom wall 22 of the oil storage tank 200. In this way, when the oil storage tank 200 is supported, the second side surface 242 and the bottom wall 22 of the oil storage tank 200 can be in contact with the tabletop at the same time, so that the oil storage tank 200 will not tilt when placed, and the waste oil overflow can be avoided.

[0064] In some embodiments, the support frame 24 and the rear side wall 23 of the oil storage tank 200 can be fixedly connected. In this way, the number of components during the installation of the range hood 10 can be reduced.

[0065] In other embodiments, the support frame 24 and the oil storage tank 200 can also be detachably connected. For example, only an installation groove (not shown in the figure) can be reserved on the rear side wall 23 of the oil storage tank 200, and one end of the support frame 24 can be detachably clamped in the installation groove. When the oil storage tank 200 is removed, the support frame 24 can be installed through the installation groove. For example, one end of the support frame 24 is clamped in the installation groove to support the oil storage tank 200. When the oil storage tank 200 is connected to the smoke collecting hood 100, the support frame 24 can be detached from the installation groove to avoid affecting the flow guiding function of the rear side wall 23.

[0066] In other embodiments, the support frame 24 and the rear side wall 23 can be rotatably connected. For example, the support frame 24 can be connected to the rear side wall 23 of the oil storage tank 200 through a rotating shaft, so that the support frame 24 has a support state and a closed state. In this way, while the support frame 24 has a support function, it does not affect the flow guiding function of the rear side wall 23 of the oil storage tank 200.

[0067] In some embodiments, in the support state, the support frame 24 protrudes from the outer surface of the rear side wall 23 of the oil storage tank 200 to support the oil storage tank 200 when the oil storage tank 200 is placed on the tabletop. In the closed state, the support frame 24 is flush with the outer surface of the rear side wall 23 of the oil storage tank 200. In this way, the protrusions on the rear side wall 23 of the oil storage tank 200 are reduced, and the influence of the support frame 24 on the flow guiding function of the rear side wall 23 of the oil storage tank 200 is reduced.

[0068] In the above embodiments, a support frame 24 is provided on the oil storage tank 200, and the support frame 24 can support the oil storage tank 200 when the oil storage tank 200 is placed on the tabletop, preventing the waste oil in the oil storage tank 200 from flowing out.

[0069] In summary, the structure of the range hood 10 provided by the present application is simple and the cost is low. The front air inlet 11 is large in the middle and small on both sides, which can improve the utilization efficiency of the air flow, move the front side pressure forward as much as possible, and reduce the escaping smoke on the front side; the rear air inlet 12 is large in the middle and small on both sides, which can distribute the pressure to the left and right sides to correspond to the positions of the cookware during cooking, and can perform directional pressure radiation and flow strengthening on the left and right sides to achieve better smoking effects on both sides.

[0070] The above are only the embodiments of the present application, and do not thus limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall similarly be included in the patent protection scope of the present application.

Claims

1. An oil fume suction machine, characterized in that, The range hood includes: a smoke collecting hood which forms a receiving cavity. The smoke collecting hood includes a first smoke suction plate. The first smoke suction plate is provided with a plurality of front air inlets communicating with the receiving cavity and a plurality of rear air inlets communicating with the receiving cavity. The plurality of front air inlets are located on the front side of the first smoke suction plate, and the plurality of rear air inlets are located on the rear side of the first smoke suction plate. Among them, the front side of the first smoke suction plate is the side close to the user, and the rear side of the first smoke suction plate faces away from the front side of the first smoke suction plate. Among the plurality of front air inlets, the area of the front air inlet located at the middle position of the first smoke suction plate is larger than the area of the front air inlets located at both ends of the first smoke suction plate; and / or, among the plurality of rear air inlets, the area of the rear air inlet located at the middle position of the first smoke suction plate is smaller than the area of the rear air inlets located at both ends of the first smoke suction plate. At least one of the front air inlets is provided with a front guide vane. One end of each front guide vane is connected to one end of the corresponding front air inlet away from the middle position of the first smoke suction plate, and the other end of the front guide vane extends into the receiving cavity; and / or, at least one of the rear air inlets is provided with a rear guide vane. One end of the rear guide vane is connected to one end of the rear air inlet away from the middle position of the first smoke suction plate, and the other end of the rear guide vane extends into the receiving cavity.

2. The range hood according to claim 1, wherein, The plurality of front air inlets are arranged side by side in a first direction. In the direction from the middle position of the first smoke suction plate to both ends of the first smoke suction plate, the areas of the plurality of front air inlets gradually decrease. The plurality of rear air inlets are arranged side by side in the first direction. In the direction from the middle position of the first smoke suction plate to both ends of the first smoke suction plate, the areas of the plurality of rear air inlets gradually increase. Among them, the first direction is perpendicular to the interval direction between the front side and the rear side of the first smoke suction plate.

3. The range hood according to claim 2, wherein, The connection line of the ends of the plurality of front air inlets facing away from the rear air inlets is parallel to the first direction.

4. The range hood according to claim 2, wherein, The connection line of the ends of the plurality of rear air inlets facing away from the front air inlets is parallel to the first direction.

5. The range hood according to claim 1, characterized in that, The plurality of front air inlets include a plurality of first front air inlets and a plurality of second front air inlets which are arranged at intervals, and the plurality of rear air inlets include a plurality of first rear air inlets and a plurality of second rear air inlets which are arranged at intervals.

6. The range hood according to claim 1, wherein, The included angle between the front guide vane and the plane where the front air inlet is located is α, where 45° ≤ α ≤ 90°. The included angle between the rear guide vane and the plane where the rear air inlet is located is β, where 45° ≤ β ≤ 90°.

7. The range hood according to claim 6, characterized in that, The ratio of the area of the orthographic projection of each front guide vane on the plane where the corresponding front air inlet is located to the area of the corresponding front air inlet is less than 0.

5. The ratio of the area of the orthographic projection of each rear guide vane on the plane where the corresponding rear air inlet is located to the area of the corresponding rear air inlet is less than 0.

5.

8. The range hood according to claim 1, characterized in that, The smoke collecting hood has a front side facing the user and a rear side opposite to the front side. In the direction from the front side to the rear side of the smoke collecting hood, the distance between the first smoke suction plate and the stove top surface gradually increases.

9. The range hood according to claim 1, characterized in that, The range hood further includes a second smoke suction plate which is arranged side by side and at intervals with the first smoke suction plate. The second smoking plate is disposed in the accommodating cavity. A plurality of first inner air inlets communicating with the accommodating cavity and a plurality of second inner air inlets communicating with the accommodating cavity are provided on the second smoking plate. The plurality of first inner air inlets are located on the front side of the second smoking plate, and the plurality of second inner air inlets are located on the rear side of the second smoking plate; The plurality of first inner air inlets and the plurality of front air inlets are arranged in an alternating manner, and the plurality of second inner air inlets and the plurality of rear air inlets are arranged in an alternating manner.

10. The range hood according to claim 9, characterized in that, The distance between the first smoking plate and the second smoking plate is d, where 12 mm ≤ d ≤ 20 mm.

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