Range hood

Abstract

The utility model provides a range hood which comprises a fan assembly and an air inlet cavity assembly, the air inlet cavity assembly comprises a lower shell, a first air inlet hole is formed in the lower shell, the range hood further comprises an oil guide plate, the oil guide plate is arranged in the lower shell and corresponds to the first air inlet hole, the oil guide plate comprises a connecting part and a flow guide part, and the connecting part is arranged in the lower shell and corresponds to the first air inlet hole. The connecting part is arranged in parallel with the extension direction of the top plate of the lower shell, the flow guide part is arranged towards the first air inlet hole, and an included angle of 12-45 degrees is formed between the flow guide part and the connecting part. The oil guide plate is arranged to be provided with the flow guide part and the connecting part, so that oil dirt is independently guided through the flow guide part, the oil dirt is prevented from being accumulated on the top plate and dripping on the stove from the first air inlet hole, and the oil guide plate is connected with the lower shell through the connecting part. In addition, the included angle between the flow guide part and the extending direction of the top plate is 12-45 degrees, and the flow guide part is inclined to correspondingly reduce the air inlet resistance of the oil guide plate to the fan assembly while the oil dirt can effectively flow through the flow guide part.

Description

Technical Field

[0001] The utility model particularly relates to a range hood. Background Art

[0002] The range hood is a household appliance commonly used in home kitchens. The range hood comprises a fan assembly and an air intake chamber assembly, wherein the air intake chamber assembly is provided with an air intake hole corresponding to the stove. The existing air intake chamber assembly is usually provided with a guide plate assembly to guide the oil from the air intake hole, or to guide the oil accumulated in the fan assembly to prevent the oil from dripping from the air intake hole to the stove. However, while the guide plate assembly is provided to guide the oil, the guide plate assembly occupies the space of the internal flow channel of the air intake chamber assembly, which increases the air flow resistance flowing into the fan from the air intake hole, thereby deteriorating the oil fume adsorption effect of the fan assembly, failing to meet the needs of users, resulting in a poor user experience. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a range hood in order to overcome the defect in the prior art that the guide plate has a greater influence on the air inlet resistance of the fan.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A range hood, comprising a fan assembly and an air inlet chamber assembly, wherein the air inlet chamber assembly comprises a lower shell, and a first air inlet hole is arranged on the lower shell. The range hood also comprises:

[0006] An oil guide plate is arranged in the lower shell body and corresponds to the first air inlet hole. The oil guide plate includes a connecting portion and a guide portion. The connecting portion is arranged parallel to the extension direction of the top plate of the lower shell body, and the guide portion is arranged toward the first air inlet hole and forms an angle of 12-45° with the connecting portion.

[0007] In this solution, the oil guide plate is configured to be a guide portion and a connection portion, so that the oil is guided through the guide portion alone and prevented from accumulating on the top plate and dripping onto the cooker from the first air inlet, and the oil guide plate is connected to the lower shell through the connection portion. In addition, the guide portion is configured at an angle of 12-45° to the extension direction of the top plate. According to the test results, the guide portion at the above angle can effectively flow the oil, and compared with the overall tilted setting of the oil guide plate, the tilted guide portion makes the oil guide plate occupy a smaller flow channel space in the lower shell for the airflow, thereby reducing the resistance of the oil guide plate to the air intake of the fan assembly, improving the effect of the range hood in absorbing oil smoke, and meeting user needs.

[0008] Preferably, the first air inlet hole and the fan assembly are staggered along the height direction of the range hood, and the oil guide plate is located between the fan assembly and the first side of the lower shell along the height direction of the range hood.

[0009] In this solution, through the above arrangement, the guide portion guides the oil to the end of the guide portion away from the connection portion, that is, the lowest point of the guide portion along the height direction of the range hood, and does not drip into the first air inlet hole when dripping. In addition, the oil guide plate is located between the fan assembly and the first side of the lower shell along the height direction of the range hood, so that the size of the oil guide plate is smaller, and the corresponding air inlet resistance to the fan assembly is also smaller.

[0010] Preferably, the length of the connecting portion along the extension direction of the top plate is 15-25 mm.

[0011] In the present solution, through the above-mentioned arrangement, the size of the guide part along the height direction of the range hood is correspondingly limited in a manner of limiting the length of the connecting part, that is, the shorter the connecting part, the higher the lowest point size of the guide part, the smaller the space occupied by the oil guide plate in the flow channel of the lower shell, and the corresponding oil guide plate reduces the air intake resistance of the fan assembly.

[0012] Preferably, the lower shell is provided with a step groove corresponding to the connecting portion, and a protrusion is provided at one end of the connecting portion away from the guide portion. The protrusion is arranged along the extension direction of the connecting portion and overlaps the step groove, and the side of the protrusion abuts against the inner wall of the step groove.

[0013] In the present solution, through the above arrangement, the protrusion of the clamping connection portion is used to position the end of the oil guide plate, and at the same time, the oil guide plate is prevented from shaking in the lower shell body. Compared with the threaded connection, it is more convenient to install and disassemble.

[0014] Preferably, the top plate is detachably connected to the lower shell, and a first flange is provided on the top plate, the first flange is arranged in a direction away from the first air inlet hole, and a hanging groove is provided on the guide part, and the guide part is hung on the first flange through the hanging groove and connected to the top plate.

[0015] In this solution, through the above-mentioned setting, the other end of the oil guide plate is connected to the top plate in a hanging manner. The hanging and the connection directions of the protrusion and the step groove are different, which can limit the overlap of the protrusion and the step groove and improve the stability of the connection.

[0016] Preferably, the first air inlet hole is arranged obliquely with respect to the top plate, and the plane where the first air inlet hole is located is parallel to the air guide portion, and the size of the air guide portion along the extension direction of the top plate is larger than the size of the first air inlet hole.

[0017] In this solution, the above arrangement is used to ensure that when the oil guide plate guides the oil, the oil will not drip from the lowest point of the guide portion to the first air inlet hole.

[0018] Preferably, a second air inlet hole and a third air inlet hole are also provided on the lower shell body, the first air inlet hole is provided close to the first side of the lower shell body, the third air inlet hole is provided close to the second side of the lower shell body, the second air inlet hole is provided close to both ends of the lower shell body, and the second air inlet hole and the third air inlet hole are staggered with the fan assembly along the height direction of the range hood.

[0019] In this solution, the above-mentioned arrangement is used to increase the number of air inlet holes to ensure the air intake into the fan assembly.

[0020] Preferably, the size of the first air inlet hole is larger than the size of the second air inlet hole, and the size of the first air inlet hole is also larger than the size of the third air inlet hole.

[0021] In this solution, through the above arrangement, the oil guide plate can be set at the first air inlet hole with the largest size. The sizes of other air inlets are small, the air intake volume is small, and the oil dripping is correspondingly less.

[0022] Preferably, a second flange is provided on the top plate toward the fan assembly, an avoidance hole is provided on the second flange corresponding to the first flange, and the second flange is detachably connected to the fan assembly.

[0023] In this solution, the above arrangement is used to avoid interference between the oil guide plate and the first flange when they are hooked.

[0024] Preferably, a embossing groove is further provided on the top plate, and the embossing groove is located on the outer peripheral side of the second flange.

[0025] In this solution, the structural strength of the top plate is increased through the above-mentioned arrangement.

[0026] The positive and progressive effect of the utility model is that the oil guide plate is set to be a guide part and a connection part, so that the oil is guided through the guide part alone and the oil is prevented from accumulating on the top plate and dripping onto the cooker from the first air inlet hole, and the oil guide plate is connected to the lower shell through the connection part. In addition, the guide part is set at an angle of 12-45° with the extension direction of the top plate. According to the test results, the guide part at the above angle can effectively flow the oil, and compared with the overall inclined setting of the oil guide plate, the inclination of the guide part makes the oil guide plate occupy a smaller flow channel space of the air flow in the lower shell, thereby reducing the resistance of the oil guide plate to the air intake of the fan assembly, improving the effect of the range hood in absorbing oil smoke, and meeting user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The utility model is a three-dimensional diagram of a range hood according to a preferred embodiment.

[0028] Figure 2 This is a positional relationship diagram of the lower shell and the top plate of a preferred embodiment of the utility model.

[0029] Figure 3 This is a positional relationship diagram of the oil guide plate and the first air inlet hole in a preferred embodiment of the utility model.

[0030] Figure 4 This is a three-dimensional diagram of a top plate of a preferred embodiment of the utility model.

[0031] Figure 5 It is a three-dimensional diagram of the lower shell of a preferred embodiment of the utility model.

[0032] Figure 6 for Figure 5 A partial enlarged view of middle A.

[0033] Figure 7 This is a diagram showing the position relationship between the avoidance hole and the second flange in a preferred embodiment of the utility model.

[0034] Figure 8 This is a three-dimensional diagram of an oil guide plate according to a preferred embodiment of the utility model.

[0035] Description of reference numerals:

[0036] Range hood 100

[0037] Fan assembly 10

[0038] Air intake chamber assembly 20

[0039] Lower housing 21

[0040] Top Plate 22

[0041] First flange 221

[0042] Second flange 222

[0043] First air inlet 211

[0044] Second air inlet 212

[0045] The third air inlet 213

[0046] Oil guide plate 1

[0047] Connection part 11

[0048] Bump 111

[0049] Guide part 12

[0050] Mounting slot 121

[0051] Step groove 2

[0052] Avoidance hole 3

[0053] Pressed groove 4 DETAILED DESCRIPTION

[0054] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0055] This embodiment provides a range hood 100, the specific structure of which is as follows Figure 1 , Figure 2 and Figure 3 As shown, the range hood 100 includes a fan assembly 10 and an air inlet chamber assembly 20, the air inlet chamber assembly 20 includes a lower shell 21, and the lower shell 21 is provided with a first air inlet hole 211. The range hood 100 also includes:

[0056] The oil guide plate 1 is arranged in the lower shell 21 and corresponds to the first air inlet hole 211. The oil guide plate 1 includes a connecting portion 11 and a guide portion 12. The connecting portion 11 is arranged parallel to the extension direction of the top plate 22 of the lower shell 21, and the guide portion 12 is arranged toward the first air inlet hole 211 and forms an angle of 12-45° with the connecting portion 11.

[0057] Specifically, the top plate 22 extends in the horizontal direction, the lower shell 21 is located below the top plate 22, the lower shell 21 is a trapezoidal structure in cross section, the first air inlet hole 211 is arranged at the bottom of the lower shell 21 and corresponds to the stove setting, the oil guide plate 1 is connected to the top plate 22 and is located in the lower shell 21, so as to correspond to the first air inlet hole 211 and guide the oil in the airflow flowing into the lower shell 21 from the first air inlet hole 211, so as to prevent the oil from accumulating on the top plate 22 and dripping from the first air inlet hole 211 to the stove. From the cross-section, the oil guide plate 1 is composed of a guide portion 12 and a connecting portion 11, and the connecting portion 11 and the guide portion 12 are integrally formed, wherein the connecting portion 11 is parallel to the top plate 22, that is, the connecting portion 11 extends in the horizontal direction, and the guide portion 12 is arranged at an angle of 12-45° with the connecting portion 11, that is, the guide portion 12 is inclined. Through the finite element software analysis test in the prior art, it is concluded that when the guide portion 12 and the connecting portion 11 are at the above-mentioned angle, the oil can flow effectively on the guide portion 12, and compared with other angles, the resistance to the airflow flowing to the fan assembly 10 is smaller, that is, the air intake resistance of the range hood 100 is reduced. It can be understood that the finite element software analysis test belongs to the prior art, and the present embodiment does not improve it, and it will not be elaborated on here.

[0058] In addition, when the size of the lower shell 21 remains unchanged, that is, the size of the flow channel inside the lower shell 21 remains unchanged, the guide portion 12 and the connecting portion 11 are arranged at an angle of 12-45°. Compared with the overall inclined setting of the oil guide plate 1, the guide portion 12 alone is used to guide the oil and prevent the oil from accumulating on the top plate 22 and dripping onto the cooker from the first air inlet hole 211. Compared with the overall inclined setting of the oil guide plate 1, the size of the inclined part is smaller, that is, the inclination of the guide portion 12 makes the oil guide plate 1 occupy a smaller flow channel space for the airflow flow in the lower shell 21 and generate an intake resistance, thereby reducing the resistance of the oil guide plate 1 to the air intake of the fan assembly 10, improving the effect of the range hood 100 in absorbing oil fumes, meeting user needs, and improving the user experience accordingly.

[0059] In this embodiment, the first air inlet 211 and the fan assembly 10 are staggered along the height direction of the range hood 100 , and the oil guide plate 1 is located between the fan assembly 10 and the first side of the lower shell 21 along the height direction of the range hood 100 .

[0060] Specifically, along the height direction of the range hood 100, the height of the fan assembly 10 is higher than the heights of the oil guide plate 1 and the lower shell 21, the height of the oil guide plate 1 is higher than the height of the first air inlet hole 211, and the fan assembly 10 is located on the first side in the height direction of the range hood 100, that is, it is arranged away from the first side of the lower shell 21, and the first air inlet hole 211 is located on the second side in the height direction of the range hood 100, that is, it is arranged close to the first side of the lower shell 21, and the oil guide plate 1 corresponding to the first air inlet hole 211 is also arranged close to the first side of the lower shell 21, so that the oil guide plate 1 and the fan assembly 10 are staggered, thereby reducing the air intake resistance of the oil guide plate 1 to the fan assembly 10.

[0061] It can be understood that the oil guide plate 1 is arranged close to the first side of the lower shell body 21, and one end of the oil guide plate 1, namely the connecting portion 11, is arranged toward the first side of the lower shell body 21, and the other end of the oil guide plate 1, namely the guide portion 12, has an extension dimension along the extension direction of the top plate 22 that does not exceed the dimension of the fan assembly 10 toward the first side of the lower shell body 21, so as to realize that the oil guide plate 1 is located between the fan assembly 10 and the first side of the lower shell body 21 along the height direction of the range hood 100, that is, the size of the oil guide plate 1 is further restricted, so that the size of the oil guide plate 1 is smaller, and correspondingly the air inlet resistance to the fan assembly 10 is also smaller.

[0062] In this embodiment, the length of the connecting portion 11 along the extending direction of the top plate 22 is 15-25 mm.

[0063] Specifically, the connecting portion 11 is a straight line when viewed from the cross section, and the guide portion 12 is a triangular line when viewed from the cross section. The total length of the oil guide plate 1 is obtained based on the fact that the oil guide plate 1 is arranged between the fan assembly 10 and the first side of the lower shell 21. On the basis of limiting the length of the connecting portion 11, according to the angle between the guide portion 12 and the connecting portion 11, the end of the guide portion 12 away from the connecting portion 11, that is, the height difference between the lowest point of the guide portion 12 and the height of the connecting portion 11, can be obtained by trigonometric functions or other existing calculation methods. This is a prior art and will not be elaborated on here.

[0064] It can be understood that when the length of the connecting portion 11 is shorter, the size of the lowest point of the guide portion 12 is higher, that is, the farther the lowest point of the guide portion 12 along the height direction of the range hood 100 is from the first air inlet hole 211, the smaller the space occupied by the oil guide plate 1 in the flow channel of the lower shell 21, and the corresponding oil guide plate 1 to the air inlet resistance of the fan assembly 10 is correspondingly reduced.

[0065] like Figure 5 , Figure 6 and Figure 8 In this embodiment, a step groove 2 is provided at the lower shell 21 corresponding to the connecting portion 11, and a protrusion 111 is provided at one end of the connecting portion 11 away from the guide portion 12. The protrusion 111 is arranged along the extension direction of the connecting portion 11 and overlapped in the step groove 2, and the side of the protrusion 111 abuts against the inner wall of the step groove 2.

[0066] Specifically, the step groove 2 is a rectangular groove, and an opening is provided along the extension direction of the top plate 22. The protrusion 111 on the connection part 11 overlaps in the step groove 2. The protrusion 111 and the connection part 11 are located on the same horizontal plane, and the inner walls on opposite sides of the step groove 2 limit the movement of the protrusion 111 in the direction perpendicular to the extension direction of the top plate 22 to position the connection part 11 of the oil guide plate 1. The protrusion 111 is used to connect one end of the oil guide plate 1 to the lower housing 21 without bolts, so as to improve the surface flatness of the oil guide plate 1, facilitate disassembly, and reduce the intake resistance that may be generated by the bolt assembly. The overlapping connection method prevents the oil guide plate 1 from shaking in the lower housing 21, and is more convenient in installation and disassembly than the screw connection.

[0067] It is understandable that by providing the step groove 2, the oil guide plate 1 will not protrude from the surface of the lower shell 21 when connected to the lower shell 21, so as to ensure that the surface of the lower shell 21 is flat and improve the neatness of the appearance of the range hood 100.

[0068] In this embodiment, the top plate 22 is detachably connected to the lower shell 21, and a first flange 221 is provided on the top plate 22. The first flange 221 is arranged in a direction away from the first air inlet hole 211. A hanging groove 121 is provided on the air guide part 12. The air guide part 12 is hung on the first flange 221 through the hanging groove 121 and connected to the top plate 22.

[0069] Specifically, the top plate 22 and the lower shell 21 are detachably connected by a bolt assembly, and a threaded hole is provided in the step groove 2 corresponding to the top plate 22, and the threaded hole and the protrusion 111 extending into the step groove 2 are staggered to avoid interference. The other end of the oil guide plate 1 is connected to the top plate 22, that is, the guide part 12 is connected to the first flange 221 on the top plate 22 through the hanging groove 121, wherein the first flange 221 extends along the height direction of the range hood 100, and correspondingly, the hanging groove 121 is also provided along the height direction of the range hood 100, and the opening of the hanging groove 121 faces the first flange 221, and the other end of the oil guide plate 1 is connected to the top plate 22 in a hanging manner, and the hanging and the connection method of the protrusion 111 and the step groove 2 The directions are different, and the direction in which the protrusion 111 cooperates with the step groove 2 is along the extension direction of the top plate 22, that is, the horizontal direction, and the direction in which the hanging groove 121 cooperates with the first flange 221 is along the height direction of the range hood 100, that is, the vertical direction, so as to limit the overlap in the horizontal direction through the hanging in the vertical direction, prevent the oil guide plate 1 from being separated from the step groove 2 along the direction in which the protrusion 111 extends into the step groove 2, and improve the stability of the connection between the oil guide plate 1 and the lower shell body 21 and the top plate 22.

[0070] In this embodiment, the first air inlet 211 is inclined with respect to the top plate 22 , and the plane where the first air inlet 211 is located is parallel to the air guide 12 , and the size of the air guide 12 along the extension direction of the top plate 22 is larger than that of the first air inlet 211 .

[0071] Specifically, the guide part 12 is arranged corresponding to the first air inlet hole 211 and is used to guide the oil dirt to prevent the oil dirt from dripping from the first air inlet hole 211. When the guide part 12 is arranged obliquely relative to the connecting part 11, the first air inlet hole 211 at the bottom of the lower shell 21 is arranged parallel to the guide part 12, and the air inlet resistance is further reduced compared to when the plane where the first air inlet hole 211 is arranged in the horizontal direction and there is an angle with the guide part 12. By setting the size of the guide part 12 to be larger than the size of the first air inlet hole 211, so that the guide part 12 guides the oil dirt to the end of the guide part 12 away from the connecting part 11, that is, the lowest point of the guide part 12 along the height direction of the range hood 100 and drips, the lowest point in the height direction of the range hood 100 is staggered with the first air inlet hole 211, so that the oil dirt will not drip into the first air inlet hole 211.

[0072] In other embodiments, a baffle is further provided at the edge of the first air inlet hole 211, and the baffle is higher than the plane where the first air inlet hole 211 is located, so as to prevent oil from accumulating at the bottom of the lower shell 21 and flowing into the edge of the first air inlet hole 211, thereby further improving the user experience.

[0073] In this embodiment, a second air inlet hole 212 and a third air inlet hole 213 are further provided on the lower shell body 21. The first air inlet hole 211 is provided close to the first side of the lower shell body 21, the third air inlet hole 213 is provided close to the second side of the lower shell body 21, the second air inlet hole 212 is provided close to both ends of the lower shell body 21, and the second air inlet hole 212 and the third air inlet hole 213 are staggered with the fan assembly 10 along the height direction of the range hood 100.

[0074] Specifically, in addition to the first air inlet hole 211, the lower shell 21 is also provided with a second air inlet hole 212 and a third air inlet hole 213. The first air inlet hole 211 and the third air inlet hole 213 are both arranged on the bottom plate of the lower shell 21, and are arranged close to the first side and the second side respectively. The second air inlet hole 212 is arranged close to both ends of the lower shell 21. The bottom plate is rectangular and recessed toward the lower shell 21, so as to ensure the air intake entering the fan assembly 10 by increasing the number of air inlet holes. In addition, each air inlet hole and the fan assembly 10 are staggered along the height direction of the range hood 100, that is, a bottom plate is arranged corresponding to the fan assembly 10 to receive the oil stains from the fan assembly 10 through the bottom plate, and the first air inlet hole 211, the second air inlet hole 212 and the third air inlet hole 213 are all located at the edge of the bottom plate to prevent the oil stains from the fan assembly 10 from directly dripping into the first air inlet hole 211, the second air inlet hole 212 and the third air inlet hole 213 when dripping along the height direction of the range hood 100.

[0075] Furthermore, the size of the first air inlet 211 is larger than that of the second air inlet 212, and the size of the first air inlet 211 is also larger than that of the third air inlet 213. The first air inlet 211 is used as the main air inlet, and the remaining air inlet are used as auxiliary air inlet. It is only necessary to set the oil guide plate 1 at the first air inlet 211 with the largest size. The sizes of the other air inlets are small, the air intake is small, and they are far away from the stove, so that the oil stains dripping are reduced accordingly.

[0076] like Figure 4 and Figure 7 As shown, in this embodiment, a second flange 222 is provided on the top plate 22 toward the fan assembly 10 , and a avoidance hole 3 is opened on the second flange 222 corresponding to the first flange 221 , and the second flange 222 is detachably connected to the fan assembly 10 .

[0077] Specifically, the second flange 222 is arranged along the height direction of the range hood 100, and the fan assembly 10 includes a housing, and the housing is connected to the second flange 222 by a bolt assembly to achieve a detachable connection between the second flange 222 and the fan assembly 10. The size of the second flange 222 is larger than the first flange 221, and a avoidance hole 3 is provided on the second flange 222. The avoidance hole 3 corresponds to the hanging groove 121 of the air guide portion 12, and the first flange 221 is arranged in the avoidance hole 3 and extends along the height direction of the range hood 100. When hanging, the hanging groove 121 extends from the avoidance hole 3 and hangs with the first flange 221. By providing the avoidance hole 3, interference between the oil guide plate 1 and the first flange 221 can be avoided when hanging.

[0078] In this embodiment, a embossing groove 4 is further provided on the top plate 22 , and the embossing groove 4 is located on the outer peripheral side of the second flange 222 .

[0079] Specifically, the embossed groove 4 extends toward the lower shell 21 along the height direction of the range hood 100. Compared with the plane where the top plate 22 is located, the height of the embossed groove 4 is lower than the height of the top plate 22. The embossed groove 4 is formed by a stamping process in the prior art to increase the structural strength of the top plate 22.

[0080] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A range hood, comprising a fan assembly and an air inlet chamber assembly, wherein the air inlet chamber assembly comprises a lower shell, and a first air inlet hole is arranged on the lower shell, wherein: The range hood also includes: An oil guide plate is arranged in the lower shell body and corresponds to the first air inlet hole. The oil guide plate includes a connecting portion and a guide portion. The connecting portion is arranged parallel to the extension direction of the top plate of the lower shell body, and the guide portion is arranged toward the first air inlet hole and forms an angle of 12-45° with the connecting portion.

2. The range hood according to claim 1, characterized in that: The first air inlet hole and the fan assembly are staggered along the height direction of the range hood, and the oil guide plate is located between the fan assembly and the first side of the lower shell along the height direction of the range hood.

3. The range hood according to claim 2, characterized in that: The length of the connecting portion along the extension direction of the top plate is 15-25 mm.

4. The range hood according to claim 2, characterized in that: The lower shell is provided with a step groove corresponding to the connecting part, and a protrusion is provided at one end of the connecting part away from the guide part. The protrusion is arranged along the extension direction of the connecting part and overlaps in the step groove, and the side of the protrusion abuts against the inner wall of the step groove.

5. The range hood according to claim 4, characterized in that: The top plate is detachably connected to the lower shell, and a first flange is provided on the top plate. The first flange is arranged in a direction away from the first air inlet hole, and a hanging groove is provided on the air guide portion. The air guide portion is hung on the first flange through the hanging groove and connected to the top plate.

6. The range hood according to claim 5, characterized in that: The first air inlet hole is arranged obliquely with respect to the top plate, and a plane where the first air inlet hole is located is parallel to the air guide portion, and a size of the air guide portion along an extension direction of the top plate is larger than a size of the first air inlet hole.

7. The range hood according to claim 2, characterized in that: The lower shell body is also provided with a second air inlet hole and a third air inlet hole, the first air inlet hole is arranged close to the first side of the lower shell body, the third air inlet hole is arranged close to the second side of the lower shell body, the second air inlet hole is arranged close to both ends of the lower shell body, and the second air inlet hole and the third air inlet hole are staggered with the fan assembly along the height direction of the range hood.

8. The range hood according to claim 7, characterized in that: The size of the first air inlet hole is greater than that of the second air inlet hole, and the size of the first air inlet hole is also greater than that of the third air inlet hole.

9. The range hood according to claim 5, characterized in that: A second flange is arranged on the top plate toward the fan assembly, an avoidance hole is arranged on the second flange corresponding to the first flange, and the second flange is detachably connected to the fan assembly.

10. The range hood according to claim 9, characterized in that: The top plate is also provided with a press-formed groove, and the press-formed groove is located on the outer peripheral side of the second flange.

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