CN218001596U - Air collecting box assembly and range hood with same - Google Patents

Abstract

The utility model discloses an air collecting box assembly and a range hood with the same, wherein the air collecting box assembly comprises a shell and an air collecting box arranged in the shell, the air collecting box comprises a front side plate, air box side plates arranged on the left side and the right side of the front side plate, an air box bottom plate provided with at least one first oil leakage hole and a rear plate, and the plates are connected in a sealing manner to form an air collecting box; the front side of the front side plate is provided with an inclined section and a vertical section, the upper part of the inclined section inclines forwards, the lower part of the inclined section is horizontally provided with a strip-shaped air inlet of the air box, the vertical section, the corresponding parts of the side plate of the air box and the rear plate surround to form a smoke exhaust air channel section for accommodating a smoke exhaust fan, the outer wall surface of the side plate of the air box and the shell surround to form a noise reduction space, the upper part of the noise reduction space is wide, the lower part of the noise reduction space is narrow, and the noise reduction space gradually changes from the upper part to the lower part in an inclined manner; compared with the prior art, the utility model discloses a collection bellows subassembly, the space of making an uproar falls can noise reduction and heat to the transmission of kitchen space transmission, improves user's comfort level.

Description

Air collecting box assembly and range hood with same

Technical Field

The utility model relates to a lampblack absorber technical field specifically, relates to a collection bellows subassembly and have its lampblack absorber.

Background

The lampblack absorber is arranged above a kitchen cooker and used for extracting and discharging oil smoke generated in a food cooking process when a user cooks food, an exhaust inlet is formed in a panel of the lampblack absorber generally, when a fan of the lampblack absorber is started, the oil smoke generated by cooking is sucked into an air channel of the air collecting box by the exhaust inlet, so that when the lampblack absorber works, the air and the oil smoke for extracting the oil smoke flow in the air channel of the air collecting box to generate great noise and the use comfort of the user is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air collecting box subassembly and have its lampblack absorber, it is used for solving above-mentioned technical problem.

An air collecting box assembly comprises a shell and an air collecting box arranged in the shell, wherein the air collecting box comprises a front side plate, air box side plates arranged on the left side and the right side of the front side plate, an air box bottom plate provided with at least one first oil leakage hole and a rear plate, and the air collecting box is formed by sealing and connecting the front side plate, the air box side plates, the air box bottom plate and the rear plate; the front of the front side plate is provided with an inclined section and a vertical section, the upper part of the inclined section inclines forwards, the lower part of the inclined section is horizontally provided with a strip-shaped air inlet of the air box, the vertical section, the corresponding parts of the air box side plate and the rear plate surround to form a smoke exhaust air channel section for accommodating a smoke exhaust fan, the outer wall surface of the air box side plate and the shell surround to form a noise reduction space, the upper part of the noise reduction space is wide, the lower part of the noise reduction space is narrow, and the noise reduction space gradually changes from the upper part to the lower part.

According to the utility model discloses an embodiment, the bellows curb plate has vertical section and extension section, and vertical section is located the upper portion of bellows curb plate, and the extension section is located the lower part of bellows curb plate, and the extension section extends to the left and right sides, and the downside in space of making an uproar is the outer wall of the extension section of bellows curb plate.

According to the utility model discloses an embodiment, the extension section of bellows curb plate divide into first section and second section, and first section and second section set up about being, are formed with between first section and second section and just look the projection and buckle for curved lower, are formed with between first section and vertical section and just look the projection and buckle for curved going up, and the height that the position was buckled on highly being less than of slope section upper end.

According to the utility model discloses an embodiment, the casing includes top cap subassembly, is located the backplate of rear side and is located the panel top cap subassembly of front side and includes top cap body and side shield, and the side shield is connected with top cap body detachable, perhaps side shield and top cap body integrated into one piece.

According to an embodiment of the present invention, the lower part of the extension section of the bellows side plate and the lower part of the left and right side baffle form a vertical narrow cavity.

According to an embodiment of the present invention, the side baffle is detachably connected to the top cap body, and the side baffle has a double-layer structure including a first wall surface facing the oil smoke space, a second wall surface facing outward, and a plate-shaped cavity formed between the first wall surface and the second wall surface; the plate-shaped cavity is a rectangular cavity or a cavity with a large top and a small bottom, the square of the thickness of the plate-shaped cavity is far smaller than the area of the plate-shaped cavity, a bending part facing the first wall surface is formed at the top of the second wall surface, the left side and the right side of the top cover body are connected with the bending part corresponding to the side, the left side and the right side of the panel are abutted to the inner side edge of the first wall surface corresponding to the side, and the left side and the right side of the back plate are abutted to the second wall surface corresponding to the side.

The utility model provides a lampblack absorber, adopts foretell collection bellows subassembly, is provided with rectangular shape panel air intake on the panel, and the panel air intake corresponds the setting with the bellows air intake, still includes outer surrounding plate, and outer surrounding plate sets up in the outside of the wind channel section of discharging fume, and outer surrounding plate and collection bellows front side board's vertical section and the left and right sides vertical section of bellows curb plate between form and fall the clearance of making an uproar.

According to an embodiment of the present invention, the inclined section of the front side plate is provided with a connecting structure, the panel is provided with a wind gap fixing portion corresponding to the connecting structure and a fixing connecting portion for fixing the wind gap fixing portion, the wind gap fixing portion and the fixing connecting portion are provided with a long noise reduction cavity with an opening facing the wind collecting box along the length direction of the panel at both sides of the panel air inlet, or/and the connecting structure and the wind gap fixing portion are provided with a long sealing cavity sealed at the panel air inlet at both sides of the panel air inlet; a compressible sealing noise reduction piece is arranged between the panel and the air inlet fixing part and surrounds the air inlet of the panel.

According to the utility model discloses an embodiment, the upper portion of panel encloses into the electric control chamber that is located the place ahead of the preceding curb plate of collection bellows with the top cap body, and the electric control intracavity is equipped with the guide fan, still is equipped with along the outside structure of making an uproar that falls that extends formation of panel at the periphery of the face of being connected of the preceding curb plate of panel and collection bellows, falls the structure of making an uproar and expands gradually at the opposite face of panel and collection bellows gradually.

According to the utility model discloses an embodiment, the space of making an uproar and automatically controlled chamber intercommunication fall, fall the space of making an uproar and communicate through locating the first oil leak hole on the bellows bottom plate with the inner chamber of collection bellows.

Compared with the prior art, the utility model discloses a collection bellows subassembly has following advantage:

the utility model discloses an air collecting box assembly, the outer wall of bellows curb plate encloses into upper portion width with the casing, and the space of making an uproar falls can noise reduction and heat to the transmission of kitchen space transmission, improves user's comfort level.

Drawings

FIG. 1 is an exploded view of the air collection box assembly of the present invention;

FIG. 2 is a schematic structural view of the wind-collecting box of FIG. 1;

FIG. 3 is a schematic view of the top cap assembly of FIG. 1;

FIG. 4 is a front view of a range hood employing the inventive wind-collecting box assembly;

FIG. 5 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a partial enlarged view of A in FIG. 5;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 8 is a partial enlarged view of B in FIG. 7;

FIG. 9 is a cross-sectional view taken along line C-C of FIG. 4;

FIG. 10 is an enlarged view of a portion C of FIG. 9;

FIG. 11 is a schematic structural view of the panel of FIG. 1;

FIG. 12 is a schematic view of the structure of FIG. 11 in another orientation;

FIG. 13 is an exploded view of another set of bellows assemblies;

FIG. 14 is a schematic view of the side dam of FIG. 13;

FIG. 15 is a schematic structural view of the panel of FIG. 13;

FIG. 16 is a schematic view of the structure of FIG. 15 in another direction;

in the figure: a. <xnotran> , b. , c. , d. , e. , f. , 1., 11. , 111., 1111. , 1112. , 112. , 12. , 121. , 1211. , 122. , 1221. , 1222. , 1223. , 1224. , 13. , 131. , 14. , 2. , 21. , 211. , 212. , 213. 214. , 22., 221. , 222. , 223., 2231. , 224. , 2241. , 2242. , 23., 231. , 232., 233. , 24. , 241. , 2411. , 2412. , 242. , 25., 26., 261. , 27. , 28. , 29., 3., 4., 41. , 411. , 412. , 413. , 42. , 421. , 43. , 431., 432., 433. , 4331. , 4332. , 4333. , 434. , 44. , 441., 442. , 45. , 46., 47. , 5., </xnotran> 6. Guide fan

The utility model discloses realization and advantage of function will combine the embodiment, will make further explanation with reference to the attached drawing.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, such practical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

It should be noted that all the directional indicators (such as upper, lower, left and right, front and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for description purposes, not specifically referring to the order or sequence, and are not intended to limit the present invention, but only to distinguish the components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified in conjunction with the accompanying drawings as follows:

the inside cavity that is equipped with of collection bellows of lampblack absorber, install the smoke exhaust fan who is used for extracting the oil smoke in the cavity, be provided with the bellows air intake on the preceding curb plate of collection bellows, the bellows air intake is connected with the panel of lampblack absorber, be equipped with the panel air intake that corresponds with the bellows air intake on the panel, the lampblack absorber during operation, smoke exhaust fan starts, the oil smoke in the kitchen has the panel air intake to get into the bellows air intake, then get into the collection bellows through the bellows air intake in, flow and discharge the collection bellows under the effect of smoke exhaust fan in the collection bellows, the air in the automatically controlled intracavity of guide fan extraction kitchen simultaneously and through the panel below emission of wind-guiding outlet to the lampblack absorber. Because the size of the panel air inlet and the air inlet of the air box is far smaller than that of the cavity of the air collecting box, when oil smoke passes through the two air inlets and enters the air collecting box, noise is generated at the air inlets; after the oil smoke enters the air collecting box, the smoke exhaust fan can also generate great noise when the smoke exhaust fan extracts the oil smoke in the cavity of the air collecting box and discharges the oil smoke outwards; then, when the guide fan in the electric control cavity discharges air to the lower part of the panel through the guide air opening, great noise is also generated; in addition, after the oil smoke enters the cavity of the air collecting box, the heat of the oil smoke can be transferred to the shell of the air collecting box, so that the temperature of the shell of the air collecting box rises, and the noise and the heat in the air collecting box can be transferred to the space of a kitchen, thereby affecting the comfort level of a user. Therefore, if the range hood can reduce the transmission of noise and heat to the kitchen space, the comfort of the user will be improved.

The utility model discloses an air collecting box assembly is exactly for noise and heat that reduces lampblack absorber during operation and transmit to the kitchen space. Referring to fig. 1 and 2, the air collecting box assembly of the present invention includes a housing, and further includes an air collecting box 1 disposed in the housing, the air collecting box 1 includes a front side plate 11, air box side plates 12 disposed on the left and right sides of the front side plate 11, an air box bottom plate 13 disposed with at least one first oil leakage hole 131, and a rear plate 14, and the above plates are hermetically connected to form the air collecting box 1; the front of the front side plate 11 is provided with an inclined section 111 and a vertical section 112, the upper part of which inclines forward, the lower part of the inclined section 111 is horizontally provided with a strip-shaped air box air inlet 1111, the vertical section 112, the corresponding parts of the air box side plate 12 and the rear plate 14 surround to form a smoke exhaust duct section for accommodating a smoke exhaust fan, the outer wall surface of the air box side plate 12 and the shell surround to form a wide upper part and a narrow lower part, and the upper part gradually inclines to change into a first noise reduction space of the lower part. When the lampblack absorber is in operation, the smoke exhaust fan in the smoke exhaust duct section of the wind collecting box 1 is started, air in the wind collecting cavity 1 is extracted, negative pressure is formed inside the wind collecting box 1, oil smoke in the air is introduced into the wind collecting box 1 through a wind box air inlet 1111 on a front side plate 11 of the wind collecting box 1, then the oil smoke is discharged out of the wind collecting box 1 through the smoke exhaust fan, when the oil smoke passes through the wind box air inlet 1111, the air box air inlet 1111 is long-strip-shaped, the width of the wind box air inlet 1111 is far smaller than that of an inclined section 111 of the front side plate 11 of the wind collecting box 1, when the oil smoke enters the wind collecting box 1 from the narrow space of the wind box air inlet 1111, large noise can be generated, when the smoke exhaust fan is started and extracted into the oil smoke in the wind collecting box 1, large noise can be generated, but because the wind collecting box 1 is arranged in the shell, the outer wall surface of the wind box side plate 12 of the wind collecting box 1 and the shell are surrounded into a wide upper portion, the lower portion is narrow, and the noise reduction space from the upper portion, after the air enters the interlayer heat of the smoke exhaust fan, when the air of the smoke exhaust fan, the interlayer heat of the smoke can be effectively reduced when the smoke exhaust fan 1, and the heat of the smoke exhaust fan can be transmitted into the interlayer of the kitchen.

Referring to fig. 2, in the wind collecting box assembly of the present invention, the wind box side plate 12 has a vertical section 121 and an extension section 122, the vertical section 121 is located on the upper portion of the wind box side plate 12, the extension section 122 is located on the lower portion of the wind box side plate 12, the extension section 122 extends to the left and right sides, and the lower side of the noise reduction space is the outer wall surface of the extension section 122 of the wind box side plate 12. The vertical section 121 of the bellows side plate 12 corresponds to the vertical section 112 of the front side plate 11, the extension section 122 of the bellows side plate 12 corresponds to the inclined section 111 of the front side plate, when the bellows side plate 12 is connected to the front side plate 11, the vertical section 121 of the bellows side plate 12 is connected to the vertical section 112 of the front side plate 11, and the height of the vertical section 121 is adapted to the height of the vertical section 112, the extension section 122 of the bellows side plate 12 is connected to the inclined section 111 of the front side plate 11, the smoke exhaust fan is disposed in the cavity of the smoke exhaust duct section enclosed by the vertical section 121 and the vertical section 112, the cavity enclosed by the extension section 122 and the inclined section 111 is located below the smoke exhaust fan, when the bellows 1 is installed in the casing, the smoke exhaust duct section extends out of the top cover of the casing, the part of the bellows 1 located below the smoke exhaust duct section is disposed in the casing, the outer wall surface of the part of the bellows 1 located below the smoke exhaust duct section encloses a noise reduction space with the casing, because the extension section 122 of the bellows 12 is obliquely disposed and located in the casing, the panel of the casing is attached to the extension section 111 of the bellows, so the bellows 12, the extension section enclosed noise reduction space is the extension section of the noise reduction space below the extension side plate 122.

Referring to fig. 2, in the wind collecting box assembly of the present invention, the expanding section 122 of the wind box side plate 12 is divided into a first section 1221 and a second section 1222, the first section 1221 and the second section 1222 are vertically disposed, a lower bend 1223 with a front view projection being a curve is formed between the first section 1221 and the second section 1222, an upper bend 1224 with a front view projection being a curve is formed between the first section 1221 and the vertical section 121, and the height of the upper end of the inclined section 111 is lower than the height of the upper bend 1224. The orthographic projections of the lower bend 1223 and the upper bend 1224 are curves, which shows that the lower bend 1223 and the upper bend 1224 are both cambered surfaces, and the cambered surfaces are used as transition surfaces, so that the connection part of two surfaces which are connected with each other and have an included angle larger than zero degree is smooth. The utility model discloses a bellows assembly, because first section 1221 slope sets up, vertical section 121 is vertical to be set up, if bend 1224 is not set up between vertical section 121 of bellows curb plate 12 and the extension section 122, the junction of vertical section 121 and extension section 122 is a connecting wire, and demonstrate an contained angle on the outward appearance face of bellows curb plate 12, simultaneously because the inclination of first section 1221 of the extension section 122 of bellows curb plate 12 and second section 1222 is different, bend 1223 under not setting up between first section 1221 of extension section 122 and the second section 1222, the junction of first section 1221 and second section 1222 is a connecting wire, and demonstrate a prominent apex angle on the outward appearance face of bellows curb plate 12, not only influence the outward appearance of bellows curb plate 12 like this, and break easily appears in footstock and contained angle department, influence the intensity of bellows curb plate 12, it can make the junction between vertical section 121 and the first section 1221 smooth 1222 of extension section 122 and the smooth junction between first section 1222 of extension section 122 to set up between vertical section 121 and the first section 1223, set up between first section 1221 and the second section 1222 and smooth. And because the left and right sides of the front side plate 11 need to be connected with the bellows side plate 12, if the joint of the vertical section 112 and the inclined section 111 is a connecting line, the bellows side plate 12 is difficult to connect at the connecting line, which increases the process difficulty and also affects the sealing degree of the joint of the front side plate 11 and the bellows side plate 12. In addition, since the inclined section 111 is divided into two upper and lower portions, the upper portion connects the vertical section 112, the upper portion serves as a transition surface, and the inclination of the portion of the inclined section which starts to connect with the vertical section 112 is still relatively small with respect to the inclination of the other portion of the inclined section 111, when the windbox side plate 12 is connected with the front side plate 11, the vertical section 121 may also connect with the portion of the inclined section 111 close to the vertical section 112, so that the height of the upper end of the inclined section 111 is lower than the height of the position where the upper bend 1224 is located.

Referring to fig. 1, fig. 3, fig. 11 and fig. 12, the casing of the bellows assembly of the present invention includes a top cover assembly 2, a back plate 3 located at the rear side and a face plate 4 located at the front side, the top cover assembly 2 includes a top cover body 21 and a side baffle 22, and the side baffle 22 and the top cover body 21 are integrally formed. The panel 4 comprises an inclined section 41, a horizontal section 42 and a lower end face 44 formed by bending the inclined section 41, the inclined section 41 is attached to an inclined section 111 of a front side plate 11 of the air collecting box 1, two sides of the inclined section 41 are abutted to side baffles 22, the back plate 3 is abutted to the rear ends of the side baffles 22, the top cover body 21, the back plate 3, the panel 4 and the side baffles 22 form a shell for mounting the air collecting box 1, an air channel through hole 211 is formed in the top cover body 21, a smoke exhaust air channel section of the air collecting box 1 is connected with the top cover body 21 and penetrates out of the air channel through hole 211, the part of the air collecting box 1 below the smoke exhaust air channel section is arranged in the shell, the outer wall face of the air box side plate 12 and the shell form a noise reduction space with wide upper part and narrow lower part, and gradually changes from the upper part to the lower part in an inclined way, when the range hood works, the noise of the smoke exhaust fan can be reduced under the effect of the noise reduction space, the effect of reducing the comfort of a user is avoided, and the heat conducted to the air of the air collecting box 1 can be reduced.

The utility model discloses a collection bellows subassembly, the lower part of the extension section 122 of bellows curb plate 12 and the lower part of the side shield 22 about form vertical narrow cavity. That is, the side baffle 22 is a vertical plate which is vertically arranged, and the expanding section 122 of the bellows side plate 12 is an inclined surface which extends to the left and right, the distance from the upper end of the inclined surface to the side baffle 22 is greater than the distance from the lower end of the inclined surface to the side baffle 22, and the width of the cavity formed between the expanding section of the bellows side plate 12 and the side baffle 22 is gradually narrowed along the height direction of the side baffle 22. In order to better connect the extension section 122 of the air box side plate 12 with the side baffle 22, the lower part of the extension section 122 of the air box side plate 12 is provided with a vertical section which is infinitely close to the side baffle 22 and forms a vertical narrow cavity between the vertical section and the side baffle 22, the noise of air entering the space can be refracted by the side baffle 22 and the wall surface of the extension section 122, the noise of the air is reduced after the repeated refraction of the narrow cavity, and the noise of the range hood can be further reduced.

Referring to fig. 1 and 3, in the wind collecting box assembly of the present invention, the top cover assembly 2 includes a top cover body 21, side baffles 22 integrally connected to left and right sides of the top cover body 21, and a supporting portion 23 connecting the side baffles 22 on the left and right sides, the cross section of the supporting portion 23 is U-shaped and forms an oil collecting tank, and at least one second oil leaking hole 231 is disposed on a bottom surface of the oil collecting tank formed by the supporting portion 23; an air duct through hole 211 is formed in the rear side of the top cover body 21, the air duct through hole 211 is used for enabling a smoke exhaust air duct section of the air collecting box 1 to penetrate through and an air inlet gap a is formed between the smoke exhaust air duct section and the outer wall surface of the smoke exhaust air duct section, the top cover body 21 extends upwards at the edges of the left side and the right side of the air duct through hole 211 to form an air collecting box connecting portion 213 connected with an air collecting box side plate 12 of the air collecting box 1, an air duct connecting hole 1211 corresponding to the air collecting box connecting portion 213 is formed in a vertical section 121 of the air collecting box side plate 12 of the air collecting box 1, after the smoke exhaust air duct section of the air collecting box 1 penetrates through the air duct through hole 211, a screw penetrates through a screw hole in the air collecting box connecting portion 213 and the air duct connecting hole 1211 to connect the air collecting box 1 with the top cover assembly 2, and the portion, below the vertical section 121 of the air collecting box 1 is installed in the shell.

Referring to fig. 3, 11 and 12, in the wind collecting box assembly of the present invention, the front side of the top cover body 21 extends downward to form a front plate 24 having an appearance surface, the left and right ends of the front plate 24 extend toward the side baffle 22 of the corresponding side and are connected to the side baffle 22 of the corresponding side, the two sides of the inclined section 41 of the panel 4 are connected to the side baffle 22 of the corresponding side, and the horizontal section 42 of the panel 4 is connected to the front plate 24. In the illustrated embodiment, the supporting portion 23 is provided with grooves 232 and first connection holes 233, each first connection hole 233 is aligned with one groove 232, the lower end surface 44 of the panel 4 is provided with a projection 441 corresponding to the groove 232 and a second connection hole 442 corresponding to the first connection hole 233, and when the lower end surface 44 of the panel 4 is connected to the supporting portion 23, the projection 441 is snapped into the groove 232 and then fixed by screws passing through the first connection hole 233 and the second connection hole 442; of course, after the projection 441 is snapped into the groove 232, the supporting portion 23 and the lower end surface 44 of the panel 4 may be adhered together by an adhesive layer. It should be noted that the width of the lower end surface 44 of the panel 4 is smaller than the width of the bottom of the supporting portion 23, and when the lower end surface 44 of the panel 4 is connected to the supporting portion 23, the lower end surface 44 of the panel 4 does not cover the second oil leakage hole 231 on the supporting portion 23, so that the waste oil in the oil collecting tank formed by the supporting portion 23 can still drop downward through the second oil leakage hole 231 after the lower end surface 44 of the panel 4 is connected to the supporting portion 23. The front side of the side baffle 22 is folded to form a first folding edge 224 with an L-shaped section, the first folding edge 224 comprises a first connecting surface 2241 connected with the side baffle 22 and a second connecting surface 2242 connected with the first connecting surface 2241, the first connecting surface 2241 is perpendicular to the side baffle 22, the second connecting surface 2242 is parallel to the side baffle 22, two sides of the panel 4 are provided with bending connecting surfaces 45, the bending connecting surfaces 45 positioned at two sides of the inclined section 41 are connected with the second connecting surface 2242 of the first folding edge 224 and the side baffle 22, the two connecting surfaces can be connected through screws and can also be bonded through an adhesive layer; the lower end of the front plate 24 is turned over to form a second flange 241 with an L-shaped section, the second flange 241 comprises a first flange 2411 connected with the front plate 24 and a second flange 2412 connected with the first flange 2411, the first flange 2411 is perpendicular to the front plate 24, the second flange 2412 is parallel to the front plate 24, the bending connection surfaces 45 at two sides of the horizontal section 42 are connected with the second flange 2412 in the part of the second flange 241 at two sides of the front plate 24, the front end of the horizontal section 42 is provided with an upper connection part 43, the upper connection part 43 comprises a buckle 431 and a connection sheet 432, the first flange 2411 in the part of the second flange 241 at the front plate 24 is provided with a buckle hole corresponding to the buckle 431, the first folding face 2411 of the part of the second folding edge 241, which is positioned on the front plate 24, is connected with the connecting piece 432 through a screw, when the horizontal section 42 is connected with the front plate 24, the bending connecting faces 45 at two sides of the horizontal section 42 are connected with the second folding face 2412 of the part of the second folding edge 241, which is positioned on two sides of the front plate 24, and the two can be connected through a screw or an adhesive layer during connection, the buckle 431 at the front end of the horizontal section 42 extends into the buckle hole on the second folding face 2412 of the part of the second folding edge 241, which is positioned on the front plate 24, and meanwhile, the connecting piece 432 at the front end of the horizontal section 42 is abutted against the first folding face 2411 and is connected with the connecting piece 432 through the first folding face 2411 through a screw; top cap subassembly 2 is still including locating the top cap body 21 left and right sides and the fender cigarette board 25 of being connected with side shield 22, keeps off cigarette board 25 and is connected with first connection face 2241, and two parts that keep off between the cigarette board 25 are the oil smoke space, and in order to make the user have better experience simultaneously, keep off cigarette board 25 and adopt and can adopt transparent glass material.

Referring to fig. 13 to 16, in other embodiments, the side baffle 22 is detachably connected to the top cover body 21, and the side baffle 22 includes a first wall 221 facing the oil smoke space, a second wall 222 facing outward, and a plate-shaped cavity formed between the first wall 221 and the second wall 222; the plate-shaped cavity is a rectangular cavity or a cavity with a large top and a small bottom, the square of the thickness of the plate-shaped cavity is far smaller than the area of the plate-shaped cavity, the second wall surface 222 is formed with a bending part 223 facing the first wall surface 221 at the top, the bending part 223 is formed into a bending connecting section 2231, a bending surface 2232 formed at the front end of the bending part 223 is positioned at the same angle with the vertical bending section 433 of the panel, and the bending surface 2232 is connected with the vertical bending section 433 of the panel 4. The side baffle 22 is a double-layer structure, the first wall 221 is an inner wall of the double-layer structure, the second wall 222 is an outer wall of the double-layer structure, a space between the first wall 221 and the second wall 222 is a plate-shaped cavity defined by the first wall 221 and the second wall 222, an opening is formed in the upper end of the plate-shaped cavity, that is, the upper end of the first wall 221 is not hermetically connected with the upper end of the second wall 222, a bent portion 223 facing the first wall 221 is formed at the top of the second wall 222, a bent connecting section 2231 is formed at the bent portion 223, the bent connecting section 2231 is used for supporting the top cover body 21, a side edge of the panel 4 is hermetically connected with an inner side edge of the first wall 221 on the corresponding side, when the range hood works, the smoke exhaust fan can extract air in the air collecting box 1, external air can enter the noise reduction space from an air inlet gap a between the smoke exhaust section of the air collecting box 1 and the top cover body 21, the air entering the noise reduction space enters the plate-shaped cavity formed between the first wall 221 and the second wall 222, and the air flow can reduce noise generated in the range hood when the range hood works. In application, the weight and the occupied space of the side baffle 22 need to be considered, so the distance between the first wall surface 221 and the second wall surface 222 of the thickness of the side baffle 22 is far smaller than the height from the upper end to the lower end of the second wall surface of the height of the side baffle 22 and the distance between the front side and the rear side of the depth side baffle 22, thus the square of the thickness of the plate-shaped cavity is far smaller than the area of the plate-shaped cavity, the structure cannot influence the increase of the occupied space of the side baffle 22, meanwhile, the gap of the plate-shaped cavity is smaller, and the small gap silencing effect is better. Since the outer wall surface of the bellows side plate 12 and the housing enclose a noise reduction space having a wide upper portion and a narrow lower portion, and gradually changes from the upper portion to the lower portion in an inclined manner, the depths of the first wall surface 221 and the second wall surface 222 gradually decrease from top to bottom, and a plate-shaped cavity formed between the first wall surface 221 and the second wall surface 222 is also a cavity having a large upper portion and a small lower portion. The area of the first wall 221 is smaller than that of the second wall 222, and an abdicating surface with a larger inner side and a smaller outer side is formed on the same plane, and the edge of the abdicating surface is defined by the edge of the first wall 221 and forms an abdicating space with the second wall 222. That is, the upper end of the first wall 221 or the upper end of a part of the first wall 221 is not connected to the upper end of the second wall 222, and the height of the upper end of the first wall 221, which is close to the user, is higher than the height of the upper end of the first wall 221, which is far from the user, that is, the upper end of the first part is gradually inclined downward from front to back, the part of the first wall 221, which is lower than the second wall 222, forms a receding surface, the edge of the receding surface is defined by the edge of the upper end of the first wall 221, and the width of the inner side of the receding surface is greater than the width of the outer side, so that when the side baffle 22 is used on the range hood, the side edge of the panel of the range hood is connected to the side baffle 22 along the edge of the inner side of the first wall 221, the receding surface is located on the inner side of the panel of the range hood and becomes the air inlet of the plate-shaped cavity, and the receding surface increases the area of the air inlet when the air flow in the transition air cavity enters the plate-shaped cavity. The panel 4 comprises an inclined section 41, a horizontal section 42 and a lower part 46, the front end of the horizontal section 42 is connected with an upper connecting part 43, the rear end of the horizontal section 42 is connected with the upper end of the inclined section 41, the lower end of the inclined section 41 is connected with the lower part 46, the lower end of the lower part 46 forms a lower end surface 44 through bending, two sides between the lower end surface 44 and the upper connecting part 43 of the panel 4 are provided with bending connecting surfaces 45, the horizontal section 42 is horizontally arranged, the inclined section 41 is obliquely arranged from top to bottom towards the rear side, the lower part 46 is vertically arranged, so that the whole panel 4 is in a bending shape, the upper connecting part 43 comprises a vertical bending section 433 and a free end horizontal section 434 formed by bending the free end of the vertical bending section 433, the free end horizontal section 434 is abutted against the top cover body 21, and the bending connecting surface 45 is abutted against the edge part for limiting the abdicating surface on the first wall surface 221 of the side baffle 22 on the corresponding side; the upper end of side shield 22 is equipped with the portion 223 of bending of circular arc type, is formed with the linkage segment 2231 of buckling on the portion 223 of bending, and the linkage segment 2231 of buckling sets up horizontally, and the linkage segment 2231 of buckling is in same horizontal plane with free end horizontal segment 434, and with top cap body 21 butt. The vertical folded edge section 433 includes a first vertical folded edge section 4331, a connection section 4332 and a second vertical folded edge section 4333, two ends of the connection section 4332 are respectively connected with one end of the first vertical folded edge section 4331 and one end of the second vertical folded edge section 4333, the other end of the first vertical folded edge section 4331 is connected with the horizontal section 42, the other end of the second vertical folded edge section 4333 is bent to form a free end horizontal section 434, wherein the first vertical folded edge section 4331 and the second vertical folded edge section 4333 are parallel to each other, the height of the first vertical folded edge section 4331 is smaller than that of the second vertical folded edge section 4333, the bent surface 2232 is connected with the second vertical folded edge section 4333, the connection section 4332 is equivalent to the extension of the horizontal section 42 of the panel 4, the width of the horizontal section 42 in the front-rear direction of the panel 4 is increased, when the range hood is in operation, a vortex region is formed near the air inlet of the panel, air flowed back by the second vertical folded edge section 4333 to the panel negative pressure port flows to the connection section 4332, and then the vortex region is prevented from escaping upwards when the first vertical folded edge section 4331.

Please refer to fig. 4 to 10, the utility model discloses still relate to a range hood, the range hood adopts foretell wind-collecting box subassembly, is provided with rectangular shape panel air intake on the panel 4, and the panel air intake corresponds the setting with bellows air intake 1111, still includes outer surrounding plate 5, and outer surrounding plate 5 sets up in the outside of the wind channel section of discharging fume, and outer surrounding plate 5 and the vertical section 121 of the vertical plane section 112 of the preceding curb plate 11 of wind-collecting box 1 and the bellows curb plate 12 on the left and right sides form the clearance of making an uproar of falling between. The top cover body 21 is provided with a surrounding plate connecting part 214 around the air duct through hole 211, and the surrounding plate 5 is arranged on the surrounding plate connecting part 214. A C-shaped thin air inlet channel C is formed between the peripheral plate 5 and the outer wall surface of the smoke exhaust channel section of the air collecting box 1, a noise reduction gap is formed in the thin air inlet channel C, after external air enters the thin air inlet channel C, an interlayer is formed between the peripheral plate 5 and the air on the outer wall surface of the smoke exhaust channel section, heat generated by the oil smoke in the smoke exhaust channel section is less in outward transfer due to the existence of the interlayer, and noise generated when the smoke exhaust fan works and the oil smoke in the air collecting box 1 flow along the air collecting box and are discharged outwards through the smoke exhaust channel section can be further silenced by the interlayer. In addition, the peripheral plate 5 surrounds the left and right sides and the side facing the user of the smoke evacuation duct section of the air collection box, the peripheral plate 5 forms the appearance face of the part, and the parts of the smoke evacuation duct section provided to the air collection box 1 can be covered by the peripheral plate 5, so that the appearance face of the range hood can be kept beautiful; the front plate 24, the horizontal section 42 of the top cover assembly 2, the vertical section 112 of the front side plate 11, the corresponding part of the front plate 24 and the side baffle plate together form an electric control cavity b, a guide fan 6 for forming negative pressure in the electric control cavity b is arranged in the electric control cavity b, and a long strip-shaped guide air opening 421 is arranged on the horizontal section 42 of the panel 4. When the range hood works, the guide fan 6 exhausts air below the panel 4 through the guide air opening 421, negative pressure is formed in the electric control cavity b, outside air enters the noise reduction space through the air inlet gap a, then enters the electric control cavity b through the noise reduction space, air can be supplemented to the electric control cavity b, outside air can enter the noise reduction space through the thin air inlet channel C which is formed between the peripheral plate 5 and the outer wall surface of the smoke exhaust air channel section, and then enters the electric control cavity b along the noise reduction space, so that air is supplemented to the electric control cavity b.

Please refer to fig. 5 and fig. 6, the range hood of the present invention is provided with a strip panel air inlet 411 on the panel 4, the panel air inlet 411 and the bellows air inlet 1111 are correspondingly disposed, further comprising a peripheral plate 5, the peripheral plate 5 is disposed at the outer side of the smoke exhaust duct section, and a noise reduction gap is formed between the peripheral plate 5 and the vertical section 112 of the front side plate 11 of the wind collecting box 1 and the vertical section 121 of the bellows side plate 12 on the left and right sides. The inclined section 111 of the front side plate 11 is provided with a connecting structure 1112, the panel 4 is provided with an air port fixing part 412 corresponding to the connecting structure 1112 and a fixing connecting part 413 for fixing the air port fixing part 412, the air port fixing part 412 and the fixing connecting part 413 are provided with a long noise reduction cavity d with an opening facing the air collecting box 1 at two sides of the panel air inlet 411 along the length direction of the panel 4, and the connecting structure 1112 and the air port fixing part 412 are provided with a long sealing cavity e sealed at the panel air inlet 411 at two sides of the panel air inlet 411; a compressible sealing noise reducer is provided around the panel inlet 411 between the panel 4 and the inlet fixture 412. In the illustrated embodiment, the air inlet fixing portion 412 is a plate-shaped structure, the plate-shaped structure protrudes upward toward one side of the front side plate 11 of the air collecting box 1 to form a protrusion, the protrusion is provided with a strip-shaped hole corresponding to the panel air inlet 411, the strip-shaped hole is smaller than the protrusion and forms a top surface on the upper surface of the protrusion, the top surface is bent toward the side where the panel is located to form a first connecting surface, a portion of the inclined section 41 surrounding the panel air inlet 411 is folded toward the direction where the air collecting box 1 is located to form a fixing connecting portion 413, the fixing connecting portion 413 is flared, the strip-shaped hole of the air inlet fixing portion 412 is sleeved on the fixing connecting portion 413 to form an air inlet gap between the wall surface of the fixing connecting portion 413 and the first connecting surface, the portion outside the fixing connecting portion 413 and the outer wall surface of the fixing connecting portion 413 form an elongated noise reduction cavity d, the air inlet gap between the wall surface of the fixing connecting portion 413 and the first connecting surface is an opening of the elongated noise reduction cavity d, when the oil smoke passes through the panel air inlet 411, the oil smoke can enter the elongated noise reduction cavity d through the opening of the panel air inlet 411, and the noise generated when the oil smoke passes through the panel air inlet 411 can be reduced. Be equipped with connection structure 1112 on the slope section 111 of the preceding curb plate 11 of album wind box 1, connection structure is sunken connection structure, the side that panel air intake 411 was kept away from to the wind box 1 place orientation bending type of wind gap fixed part 412 forms the second and connects the face, when panel 4 is connected with the slope section 111 of the preceding curb plate 11 of album wind box 1, sunken connection structure's base plane and wind gap fixed part 412 base plane butt, the second is connected the face and is kept away from the inner wall butt of panel air intake 411 one side with sunken connection structure, and form microscler sealed chamber e with sunken connection structure together, noise that produces the oil smoke through panel air intake 411 department falls. In addition, the sealing noise reduction piece is noise reduction cotton or cotton felt arranged between one side of the inclined section 41 of the panel 4 facing the air collecting box 1 and the air inlet fixing part 412, and the sealing noise reduction piece can not only seal the joint of the air inlet fixing part 412 and the panel 4, but also prevent oil smoke from vibrating the air inlet fixing part 412 when passing through the panel air inlet 411. The utility model discloses a range hood, panel 4's upper portion and top cap 2 enclose into the electric control chamber b that is located the place ahead of the preceding curb plate 11 of album bellows 1, are equipped with guide fan 6 in the electric control chamber b, still are equipped with along the panel 4 outside extension form of making an uproar structure f that falls in the periphery of the preceding curb plate 11 of panel 4 and album bellows 1, fall the structure f of making an uproar and gradually expand at panel 4 and album bellows 1's opposite face gradually. Referring to fig. 5, a first bend 47 with an arc-shaped side projection is disposed between the inclined section 41 and the horizontal section 412 of the panel 4, the first bend is an arc surface connecting the inclined section 41 and the horizontal section 412, after the inclined section 41 of the panel 4 and the inclined section 111 of the front side plate 11 of the wind collecting box 1 are attached, the upper portion of the inclined section 41 of the panel 4 is aligned with the upper end of the inclined section 111 of the front side plate 11, a noise reduction structure f gradually expanding toward the electric control cavity b is formed between the first bend 47 of the panel and the vertical section 112 of the front side plate 11, after air in the air inlet gap a enters the electric control cavity b, the air flows toward the noise reduction structure f, and noise generated by the air and noise generated when the guiding fan 6 is started are offset by the noise reduction structure f, so as to reduce noise transmitted from the electric control cavity b to the kitchen space.

Please refer to fig. 2 and 5, the range hood of the present invention has the noise reduction space communicated with the electric control chamber b, and the noise reduction space is communicated with the inner chamber of the wind collecting box 1 through the first oil leakage hole 131 on the bottom plate 13 of the wind collecting box. That is to say, after the outside air enters the noise reduction space through the air inlet gap a between the smoke exhaust duct section of the air collecting box 1 and the duct via hole 211, the outside air can enter the electric control chamber b through the noise reduction space, so when the guiding fan 6 draws the ventilation in the electric control chamber b and discharges the ventilation to the lower part of the panel 1 through the guiding air port 421, negative pressure is formed in the electric control chamber b, the air entering the noise reduction space can enter the electric control chamber b, the electric control chamber b supplements the air, in addition, because the first oil leakage hole 131 is arranged on the air box bottom plate 13, when the smoke exhaust fan starts, the part of the inner chamber of the air collecting box 1 below the smoke exhaust fan will form a negative pressure area, the oil smoke can be sucked into the inner chamber of the air collecting box 1 from the panel air inlet 411, the air in the noise reduction space can also be sucked into the inner chamber of the air collecting box 1 through the first oil leakage hole 131, and the air passing through the first oil leakage hole 131 can not only avoid the first oil leakage hole 131 from being blocked.

Referring to fig. 3, the range hood of the present invention, the top cover body 21 further has an access hole 212 in front of the air duct via hole 211, the access hole 212 is sealed with an access cover 26, and the access cover 26 is provided with a detection air hole 261. The access cover 26 is aligned with the electric control cavity b of the range hood, devices for detecting air quality and other electric devices are installed in the electric control cavity b, when the electric devices need to be maintained, the electric control cavity b can be opened by opening the access cover 26, and the electric devices are convenient to maintain; in addition, a device for detecting air quality is including guide fan 6 and detection piece, at the lampblack absorber during operation, guide fan 6 can extract the air in kitchen to detection piece department, make the air quality of detection piece in to the kitchen detect, when guide fan 6 extracts the air in kitchen, the air gets into the air intake of guide fan 6 by detection wind hole 261 on the access cover 26, blown to the detection piece again, the air is discharged after being detected by the detection piece and detecting, when the detection piece detects air quality nonconforming, the wind-force of the smoke exhaust fan of lampblack absorber can be strengthened, so that the lampblack absorber is to the powerful grow of extraction of oil smoke.

Please refer to fig. 5, the utility model discloses a range hood, air inlet clearance an and detection wind hole 261 all communicate the automatically controlled chamber b of range hood, are provided with electrical control element 27 in the automatically controlled chamber b, are provided with guide fan 6 in the electrically controlled chamber b, are provided with display unit 28 and luminous component 29 in the automatically controlled chamber b, and above each part is connected with the main control electricity of range hood, is formed with display frame 242 on the front bezel 24, and display unit 28's display surface is adjusted well with the edge that displays frame 242. At the lampblack absorber during operation, guide fan 6 starts, guide fan 6 takes out the air in the electric control chamber b and discharges electric control chamber b through guide wind gap 421, after the air in electric control chamber b is drawn by guide fan 6, can form the negative pressure in the electric control chamber b, the air in the kitchen can get into electric control chamber b through air inlet clearance an and detection wind hole 261, in time mend the air in electric control chamber b, the quality of the air that gets into air inlet clearance an and detection wind hole 261 has just represented the real-time air quality in the lampblack absorber during operation kitchen simultaneously.

Referring to fig. 3, the top cover assembly of the present invention, the electric control element 27 is a detection element, a downstream air channel is provided in the detection element, the air entering from the detection air hole 261 flows through the downstream air channel, a laser or semiconductor detection head is provided at one side of the downstream air channel for detecting dust particles in the air flowing through the downstream air channel, the downstream air channel has a discharge port, and the air discharged through the discharge port enters the air inlet of the guiding fan 6. That is to say, the electric control element 27 is a detection element for detecting air quality, an air inlet of the downstream air channel is communicated with the detection air hole 261, an exhaust port of the downstream air channel is communicated with an air inlet of the guide fan 6, the laser or semiconductor detection head is arranged at an air outlet end of the downstream air channel, when the range hood works, as the guide fan 6 extracts air in the downstream air channel, when the guide fan 6 extracts air in the downstream air channel, outside air enters the downstream air channel through the detection air hole 261 and flows along the downstream air channel, when the outside air flows to the exhaust port of the downstream air channel, the outside air flows through the laser or semiconductor detection head, the laser or semiconductor detection head detects the content of PM2.5 in the air to determine the quality of the air, and the air detected by the laser or semiconductor detection head is exhausted through the exhaust port of the downstream air channel and extracted by the guide fan 6, and finally exhausted by the guide fan 6 and exhausted downwards through the guide air port 421 on the panel.

The utility model discloses a lampblack absorber is equipped with drive unit in the following current wind channel, and drive unit is the heating member, and heating member heated air forms unidirectional following current air. That is to say, after the air enters the downstream air duct, due to the heating of the heating element, the air can only enter the air inlet of the downstream air duct through the detection air hole 261, then flows along the downstream air duct and is discharged to the discharge port of the downstream air duct, and in the process that the air flows to the air outlet of the downstream air duct, the air flows through the laser or semiconductor detection head, so that the laser or semiconductor detection head detects the quality of the outside air, and finally the air is discharged through the guide fan 6. The laser or semiconductor detection head detects air in a kitchen when the range hood works, the air quality is used for judging the oil smoke extraction effect of the range hood, air backflow can be avoided, oil smoke which is not extracted by the range hood enters the electric control cavity b through the guide air opening 421 of the panel, then reversely flows along the downstream air channel and is detected by the laser or semiconductor detection head, and the judgment result of the detection of the laser or semiconductor detection head on the air quality is influenced.

In other embodiments, the driving unit is a driving fan, and the driving fan continuously rotates to drive the air to form unidirectional downstream air. That is to say, a driving fan is arranged in the downstream air duct, when the range hood works, the guiding fan 6 is started, the driving fan is also started at the same time, the air inlet of the driving fan faces towards the air inlet of the downstream air duct, the air outlet of the driving fan faces towards the exhaust port of the downstream air duct, the laser or semiconductor detection head can be arranged between the air inlet of the driving fan and the air inlet of the downstream air duct, and the laser or semiconductor detection head can also be arranged between the air outlet of the driving fan and the exhaust port of the downstream air duct.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An air collection box assembly, comprising a housing, characterized in that: the air collecting box comprises a shell and is characterized by further comprising an air collecting box (1) arranged in the shell, wherein the air collecting box (1) comprises a front side plate (11), air box side plates (12) arranged on the left side and the right side of the front side plate (11), an air box bottom plate (13) provided with at least one first oil leakage hole (131) and a rear plate (14), and the air collecting box (1) is formed by sealing and connecting the front side plate and the rear side plate; the front of preceding curb plate (11) is provided with slope section (111) and vertical section (112) that an upper portion leaned forward the lower part level of slope section (111) is provided with rectangular shape bellows air intake (1111), vertical section (112) with bellows curb plate (12) and back plate (14) correspond the part and surround and form the flue duct section of discharging fume that is used for holding smoke exhausting fan, the outer wall of bellows curb plate (12) with the casing encloses into upper portion wide, and the lower part is narrow, and from the upper portion progressively the slope change to the space of making an uproar of lower part.

2. A windbox assembly according to claim 1, wherein the windbox side plate (12) has a vertical section (121) and an expanded section (122), the vertical section (121) is located at an upper portion of the windbox side plate (12), the expanded section (122) is located at a lower portion of the windbox side plate (12), and the expanded section (122) extends to the left and right sides, and a lower side of the noise reduction space is an outer wall surface of the expanded section (122) of the windbox side plate (12).

3. A windbox assembly according to claim 1, wherein the expanded section (122) of the windbox side plate is divided into a first section (1221) and a second section (1222), the first section (1221) and the second section (1222) are disposed up and down, a lower bend (1223) whose front projection is a curved line is formed between the first section (1221) and the second section (1222), an upper bend (1224) whose front projection is a curved line is formed between the first section (1221) and the vertical section (121), and the height of the upper end of the inclined section (111) is lower than the height of the position of the upper bend (1224).

4. A bellows assembly according to claim 1, wherein the housing comprises a top cover assembly (2), a back plate (3) at the rear side and a face plate (4) at the front side, the top cover assembly (2) comprises a top cover body (21) and a side baffle (22), the side baffle (22) is detachably connected to the top cover body (21) or the side baffle (22) is integrally formed with the top cover body (21).

5. A wind box assembly according to claim 4, characterized in that the lower part of the expanded section (122) of the wind box side plate (12) and the lower parts of the left and right side dams (22) form a vertical narrow cavity.

6. The wind collection box assembly according to claim 4, wherein the side baffle (22) is detachably connected with the top cover body (21), the side baffle (22) has a double-layer structure including a first wall surface (221) facing a lampblack space, a second wall surface (222) facing outward, and a plate-shaped cavity formed between the first wall surface (221) and the second wall surface (222); the utility model discloses a panel, including top cap body (21), panel cavity, first wall (221), second wall (222), first wall (221), the inboard marginal butt of first wall (221), the left and right sides of panel (4) and corresponding side, the left and right sides of backplate (3) and corresponding side second wall (222) butt, the square of the thickness of panel cavity is less than far away the area of panel cavity, second wall (222) are formed with the orientation at the top the portion of bending (223) of first wall (221), the left and right sides of top cap body (21) with correspond the side bend the portion (223) and connect, the left and right sides of panel (4) and corresponding side the inboard marginal butt of first wall (221), the left and right sides of backplate (3) and corresponding side the butt of second wall (222).

7. A range hood, adopt the wind-collecting box subassembly of any one of claims 1 to 6, characterized in that, be provided with rectangular shape panel air intake (411) on panel (4) of casing, panel air intake (411) with wind-collecting box air intake (1111) correspond the setting, still include outer surrounding plate (5), outer surrounding plate (5) set up the outside of smoke exhaust fan's the wind channel section of discharging fume, outer surrounding plate (5) with form between vertical section (121) of the vertical section (112) of wind-collecting box (1) preceding curb plate (11) and the bellows curb plate (12) on the left and right sides and fall the clearance of making an uproar.

8. A range hood as claimed in claim 7, wherein a connection structure (1112) is arranged on the inclined section (111) of the front side plate (11), a tuyere fixing portion (412) corresponding to the connection structure (1112) and a fixing connection portion (413) for fixing the tuyere fixing portion (412) are arranged on the panel (4), a long noise reduction cavity (d) with an opening facing the wind collecting box (1) is arranged on both sides of the panel wind inlet (411) along the length direction of the panel (4) at the tuyere fixing portion (412) and the fixing connection portion (413), or/and a long sealing cavity (e) sealed at the panel wind inlet (411) is arranged on both sides of the panel wind inlet (411) at the connection structure (1112) and the tuyere fixing portion (412); a compressible sealing noise reduction member is arranged around the panel air inlet (411) between the panel (4) and the air inlet fixing part (412).

9. A range hood as claimed in claim 7, characterized in that the upper part of the panel (4) and the top cover body (21) of the top cover assembly (2) enclose an electric control cavity (b) located in front of the front side plate (11) of the air collecting box (1), a guide fan (6) is arranged in the electric control cavity (b), a noise reduction structure (f) formed by extending outwards along the panel (4) is further arranged on the periphery of the connecting surface of the panel (4) and the front side plate (11) of the air collecting box (1), and the opposite surface of the panel (4) and the air collecting box (1) is gradually expanded by the noise reduction structure (f).

10. A range hood according to claim 9, characterized in that the noise reduction space communicates with the electrically controlled chamber (b), the noise reduction space communicating with the inner chamber of the air collecting box (1) through a first oil leak hole (131) provided in the air box bottom plate (13) of the air collecting box (1).

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