CN117146304A - Fume exhaust fan - Google Patents

Abstract

The invention discloses a range hood, which comprises a shell, wherein the shell comprises a top cover, a panel, left and right side baffles and a back plate, the range hood comprises a wind collecting box assembly, the wind collecting box assembly is arranged in the shell, a wind collecting box air inlet and a wind collecting box air outlet are formed in the wind collecting box assembly, a smoke exhaust fan is arranged between the wind collecting box air inlet and the wind collecting box air outlet, an intermediate chamber is formed between the outer wall surface of the wind collecting box assembly and the inner wall surface of the shell, and the wind collecting box assembly is provided with at least one oil drain hole which is communicated with the inner cavity of the wind collecting box assembly and the intermediate chamber; compared with the prior art, the range hood provided by the invention has the advantages that the air collecting box assembly is arranged in the shell, the middle chamber is formed between the outer wall surface of the air collecting box assembly and the inner wall surface of the shell, the noise generated during the operation of the air collecting box assembly is reduced, the heat transferred outwards by the outer wall surface of the air collecting box assembly is reduced, and the comfort level of a user is improved.

Description

Fume exhaust fan

Technical Field

The invention relates to the technical field of range hoods, in particular to a range hood.

Background

The lampblack absorber is arranged in the top of kitchen cooking utensils for when the user cooks food, the oil smoke that will cook food in-process produced is extracted and is discharged, is equipped with the inlet scoop on the panel of lampblack absorber generally, and when the fan of lampblack absorber was started, the oil smoke that the culinary art produced was inhaled in the wind channel of collection bellows by the inlet scoop, so when the lampblack absorber during operation, the wind gas and the oil smoke of extraction oil smoke can produce very big noise when the wind channel of collection bellows is interior, influences the comfort level that the user used.

Disclosure of Invention

The invention aims to provide a range hood which is used for solving the technical problems.

The utility model provides a lampblack absorber, includes the casing, and the casing includes top cap, panel, left and right sides baffle and backplate, including collection bellows subassembly, collection bellows subassembly sets up in the casing, and collection bellows subassembly is formed with bellows air intake and bellows air exit, is provided with exhaust fan between bellows air intake and bellows air exit, forms the intermediate chamber between the outer wall of collection bellows subassembly and the internal wall of casing, and collection bellows subassembly is provided with at least one oil drain hole, the inner chamber and the intermediate chamber of oil drain hole intercommunication collection bellows subassembly.

According to one embodiment of the invention, the smoke exhaust fan operates and a first negative pressure area is formed between the air inlet of the air box in the air box assembly and the smoke exhaust fan, the oil discharge hole is positioned in the first negative pressure area, and air in the middle chamber enters the first negative pressure area through the oil discharge hole.

According to one embodiment of the invention, the panel is provided with an inclined section, and an elongated panel air inlet is horizontally arranged on the inclined section; the air collecting box assembly comprises a front side plate, the front side plate comprises an inclined section and a vertical section, the inclined section has the same inclination angle as the inclined section, an air box air inlet is formed in the position, corresponding to the panel air inlet, of the inclined section, and the area of the air box air inlet is larger than that of the panel air inlet.

According to one embodiment of the invention, the air collecting box assembly further comprises air box side plates arranged on two sides of the front side plate, the air box side plates are provided with vertical sections and expansion sections, the vertical sections are arranged on the upper parts of the air box side plates, the expansion sections are arranged on the lower parts of the air box side plates, the expansion sections extend to the left and right sides and form cavities with the front side plates, and the side surfaces of the cavities are projected to be big in the upper part and small in the lower part; the outer wall surface of the expansion section and the side baffle plate enclose an intermediate chamber with a wide upper part and a narrow lower part and gradually changes from the upper part to the lower part.

According to one embodiment of the invention, the panel comprises an inclined section and a horizontal section, a first arc-shaped bending section is arranged between the inclined section and the horizontal section, an air port fixing part is arranged on one side of the inclined section facing the inclined section, a connecting structure corresponding to the air port fixing part is arranged on the inclined section, the air port fixing part is connected with the connecting structure, the inclined section is attached to the inclined section, and the panel air inlet is communicated with the air box air inlet, and a section of gradually expanding noise reduction gap is formed by the first arc-shaped bending section and the inclined section.

According to one embodiment of the invention, the panel further comprises a lower part which is arranged vertically below the inclined section, the side baffle and the back plate and the corresponding part of the lower part enclose a transition chamber which is arranged below the air collecting box assembly together with the lower part, the bottom of the middle chamber is communicated with the transition chamber, the bottom of the shell is provided with an oil dropping hole, and the oil fume on the front side of the panel is communicated with the transition chamber through the oil dropping hole.

According to one embodiment of the invention, an electric control cavity is formed between the top cover and the panel, the electric control cavity is communicated with the middle cavity, at least one guiding fan is arranged in the electric control cavity, and the guiding fan exhausts air outwards through a guiding air opening arranged on the panel, so that a second negative pressure area is formed in the electric control cavity.

According to one embodiment of the invention, the top cover is provided with an air channel via hole, the air channel via hole is used for enabling the smoke exhaust air channel section of the air collecting box assembly to pass through and form an air inlet gap with the outer wall surface of the smoke exhaust air channel section, and air outside the range hood enters the middle chamber through the air inlet gap and enters the first negative pressure area through the oil drain hole; air outside the smoke machine enters the second negative pressure area through the air inlet gap and is discharged out of the guide air opening arranged on the panel through the guide fan.

According to one embodiment of the invention, a third negative pressure area is formed outside the panel air inlet on the panel, and air discharged from the guide air inlet arranged on the panel by the guide fan enters the third negative pressure area and enters the first negative pressure area through the panel air inlet and the air box air inlet.

According to one embodiment of the invention, the smoke exhaust flue further comprises a peripheral plate, the peripheral plate is arranged on the outer vertical surface of the flue through hole, a thin air inlet channel is formed between the peripheral plate and the outer wall surface of the smoke exhaust flue section, and the thin air inlet channel is communicated with the air inlet gap and the electric control cavity.

Compared with the prior art, the range hood provided by the invention has the following advantages:

according to the range hood disclosed by the invention, the air collecting box assembly is arranged in the shell, the middle chamber is formed between the outer wall surface of the air collecting box assembly and the inner wall surface of the shell, and the noise generated when the air collecting box assembly works and the heat transferred outwards by the outer wall surface of the air collecting box assembly are reduced due to the existence of the middle chamber, so that the comfort level of a user is improved.

Drawings

Fig. 1 is a schematic structural view of a range hood according to the present invention;

fig. 2 is a front view of the range hood of the present invention;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3A;

fig. 5 is a top view of the range hood of the present invention;

fig. 6 is a schematic structural view of the range hood of the present invention when the top cover is separated from the housing;

FIG. 7 is a cross-sectional view taken in the direction B-B of FIG. 5;

fig. 8 is a schematic structural view of a panel of the range hood according to the present invention;

fig. 9 is a schematic view of another direction of a panel of the range hood according to the present invention;

fig. 10 is a schematic structural view of a side roof of the range hood according to the present invention;

FIG. 11 is a schematic structural view of a bellows assembly of the range hood of the present invention;

FIG. 12 is a schematic view of another directional structure of a bellows assembly of the range hood of the present invention;

FIG. 13 is a schematic view of another range hood housing separated from the bellows assembly;

FIG. 14 is a schematic view of the bellows assembly of FIG. 13;

FIG. 15 is a schematic view of the top cover of FIG. 13;

fig. 16 is a front view of another range hood;

FIG. 17 is a cross-sectional view taken along the direction C-C in FIG. 16;

FIG. 18 is an enlarged view of a portion of B in FIG. 17;

FIG. 19 is a cross-sectional view taken along the direction D-D in FIG. 16;

FIG. 20 is an enlarged view of a portion of C in FIG. 19;

FIG. 21 is a cross-sectional view taken along the direction E-E in FIG. 16;

FIG. 22 is an enlarged view of part of D of FIG. 21;

FIG. 23 is a schematic view of the structure of the panel of FIG. 13;

FIG. 24 is a schematic view of the structure of FIG. 13 in another direction;

in the figure: a. air intake gap, b, electric control cavity, d, first negative pressure region, g, elongated noise reduction cavity, h, elongated sealing cavity, j, noise reduction gap, 1, top cover, 11, duct via, 12, shroud attachment, 13, support, 131, oil outlet, 132, recess, 133, first attachment hole, 14, bellows attachment, 15, front panel, 151, second hem, 1511, first fold face, 1512, second fold face, 16, smoke baffle, 2, panel, 21, angled section, 211, panel air intake, 212, air port attachment, 213, fixed attachment, 22, horizontal section, 221, guide air port, 23, first arc bend, 24, lower portion, 25, bend attachment, 26, second arc bend, 27, lower end, 271, oil drip hole, 272, oil groove sliding attachment track, 273, 274, second attachment hole, 28, upper attachment, 281, vertical section. 2811 first vertical fold section, 2812 joint section, 2813 second vertical fold section, 282 free end horizontal section, 283 snap-in, 284 connecting piece, 3 side baffle, 31 bent section, 311 bent connecting section, 312 bent face, 32 first wall, 33 second wall, 34 first fold, 341 first connecting face, 342 second connecting face, 4 back plate, 5 windbox assembly, 51 front side plate, 511 inclined section, 5111 windbox inlet, 5112 connecting structure, 512 vertical section, 513 transition section, 52 windbox side plate, 521 vertical section, 5211 duct connecting hole, 522 extended section, 5221 first section, 5222 second section, 5223 lower fold, 5224 upper fold 53 windbox bottom plate, 531 oil drain hole, 54 windbox rear plate, 6 fan, 7 guide fan, 8 outer side plate 9. Oil groove

The implementation and advantages of the functions of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

Various embodiments of the invention are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the invention. That is, in some embodiments of the invention, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indicators (such as up, down, left and right, front and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement conditions, etc. between the components 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 of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the invention solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

For a further understanding of the nature, features, and efficacy of the present invention, the following examples are set forth in order to provide a further understanding of the invention, and are intended to be described in connection with the accompanying drawings:

the interior of the air collecting box assembly of the range hood is provided with a cavity, a smoke exhaust fan for extracting oil smoke is arranged in the cavity, the front side plate of the air collecting box is provided with an air inlet of the air collecting box, the air inlet of the air collecting box is connected with a panel of the range hood, the panel is provided with a panel air inlet corresponding to the air inlet of the air collecting box, when the range hood works, the smoke exhaust fan is started, oil smoke in a kitchen enters the air inlet of the air collecting box through the panel air inlet, then flows in the air collecting box and is discharged under the action of the smoke exhaust fan, and meanwhile, the air in the kitchen is extracted by the guide fan in the electric control cavity and is discharged to the lower side of the panel of the range hood through the air guide opening. 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 box, when the oil fume passes through the two air inlets and enters the air box, noise is generated at the air inlets; when the fume enters the fume collecting box, and the fume exhausting fan extracts the fume in the cavity of the fume collecting box and discharges the fume outwards, the fume exhausting fan also generates great noise; then, when the guiding fan in the electric control cavity discharges air to the lower part of the panel through the guiding air opening, great noise is generated; besides, after the oil smoke enters the cavity of the air collecting box, 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 is increased, noise and heat in the air collecting box can be transferred to a kitchen space, and comfort of a user is affected. Therefore, if the range hood can reduce the transmission of noise and heat to the kitchen space, the user's comfort will be improved.

The range hood provided by the invention is used for reducing noise generated when the air collecting box assembly 5 works and reducing heat transferred outwards from the outer wall surface of the air collecting box assembly 5, so that the comfort level of a user is improved. Referring to fig. 1 to 3, 11 and 12, the range hood of the present invention includes a housing, the housing includes a top cover 1, a panel 2, left and right side baffles 3 and a back plate 4, the housing includes a wind collecting box assembly 5, the wind collecting box assembly 5 is disposed in the housing, the wind collecting box assembly 5 is formed with a wind collecting box air inlet 5111 and a wind collecting box air outlet, a smoke exhaust fan 6 is disposed between the wind collecting box air inlet 5111 and the wind collecting box air outlet, an intermediate chamber is formed between an outer wall surface of the wind collecting box assembly 5 and an inner wall surface of the housing, the wind collecting box assembly 5 is provided with at least one oil drain hole 531, and the oil drain hole 531 is communicated with an inner cavity and the intermediate chamber of the wind collecting box assembly 5. According to the range hood disclosed by the invention, the air duct through hole 11 is formed in the top cover 1, the air duct through hole 11 is used for enabling a smoke exhaust duct section of the air collecting box assembly 5 to pass through and form an air inlet gap a with the outer wall surface of the smoke exhaust duct section, when the air collecting box assembly 5 is installed in the shell, an intermediate chamber is formed between the outer wall surface of the air collecting box assembly 5 and the inner wall surface of the shell, external air enters the intermediate chamber through the air inlet gap a and forms an air interlayer between the inner wall surface of the intermediate chamber and the outer wall surface of the air collecting box assembly 5, when the range hood works, the smoke exhaust fan 6 is started, the smoke enters the air collecting box assembly 5 through the air inlet 5111 and is then exhausted by the smoke exhaust fan 5 through the air outlet, when the smoke exhaust fan 6 extracts the smoke entering the air collecting box assembly 5, the smoke exhaust fan 6 generates larger noise, and the smoke also generates larger noise in the process of entering the air collecting box assembly 5 through the air inlet 5111, and the noise is reduced when the smoke exhaust fan enters the air inlet interlayer through the air inlet gap a and the air inlet gap a is formed between the inner wall surface of the intermediate chamber and the inner wall surface of the shell, and the noise collecting box assembly 5 is formed by the noise when the noise is reduced through the air inlet gap 5111; the heat of the oil smoke transferred to the wall surface of the air collecting box assembly 5 is also reduced under the effect of the air adding layer when being transferred to the kitchen space through the shell, so that the comfort of a user is improved. In addition, owing to be equipped with the oil drip hole on the casing, at lampblack absorber during operation, the waste oil of the oil drain hole 531 exhaust on the collection bellows subassembly 5 can be followed the oil drip hole exhaust on the casing, so the outside air of casing also can get into the intermediate chamber through the oil drip hole, the outside air of casing also includes the oil smoke that the user's culinary art in-process produced, the inner chamber and the intermediate chamber of collection bellows subassembly 5 pass through oil drain hole 531 intercommunication, can make the interior oil smoke of intermediate chamber get into the inner chamber of collection bellows subassembly 5, then by the inner chamber of exhaust fan 6 exhaust collection bellows subassembly 5.

In the range hood, the smoke exhaust fan 6 runs and a first negative pressure zone d is formed between the air inlet 5111 of the air box in the air box collecting assembly 5 and the smoke exhaust fan 6, the oil drain hole 531 is positioned in the first negative pressure zone d, and air in the middle chamber enters the first negative pressure zone d through the oil drain hole 531. When the range hood works, the smoke exhaust fan 6 is started, because the smoke exhaust fan 6 is arranged in the inner cavity of the wind collecting box assembly 5, when the smoke exhaust fan 6 is started, firstly, air in the inner cavity of the wind collecting box assembly 5 is extracted by the smoke exhaust fan 6, after the air in the inner cavity of the wind collecting box assembly 5 is extracted and exhausted, the air pressure in the wind collecting box assembly 5 is lower than the outside air pressure, when a user performs cooking operation, a large amount of smoke is generated, the smoke enters the inner cavity of the wind collecting box assembly 5 through the wind box air inlet 5111, and because a large amount of smoke is injected into the wind box air inlet 5111, the air pressure of the part, facing the outside, of the wind box air inlet 5111 is higher than the air pressure of the wind collecting box assembly 5, when the smoke exhaust fan 6 works, the air in the inner cavity of the wind collecting box assembly 5 is extracted by the smoke exhaust fan 6, a first negative pressure zone d is formed between the wind box air inlet 5111 in the wind collecting box assembly 5 and the smoke exhaust fan 6, the air pressure in the first negative pressure zone d is far lower than the outside air pressure, and the air pressure in the wind collecting box assembly 531 is located in the first negative pressure zone d, and the air pressure in the middle air outlet hole 531 is also lower than the air pressure in the air outlet cavity 5 and enters the air collecting box cavity 5 through the middle air outlet hole 5 when the outside air inlet cavity is in the middle cavity and enters the air outlet cavity 5; in addition, because the bellows assembly 5 is disposed in the housing, the waste oil dropped out from the oil drain hole 531 of the bellows assembly 5 is to be drained from the housing, so that the housing is provided with an oil drain hole for draining the waste oil, and the oil drain hole is communicated with the oil smoke space, so that after air in the middle chamber enters the inner cavity of the bellows assembly 5 through the oil drain hole 531, part of the oil smoke also enters the middle chamber through the oil drain hole, and then enters the first negative pressure region d when the air in the middle chamber is sucked by the first negative pressure region d, and then is drained by the smoke exhaust fan 6.

Referring to fig. 3, 8, 9, 11 and 12, in the range hood of the present invention, a panel 2 has an inclined section 21, and an elongated panel air inlet 211 is horizontally disposed on the inclined section 21; the wind collecting box assembly 5 comprises a front side plate 51, the front side plate 51 comprises an inclined section 511 and a vertical section 512, the inclined section 511 has the same inclination angle as the inclined section 21, a wind box air inlet 5111 is arranged at the position of the inclined section 511 corresponding to the panel air inlet 211, and the area of the wind box air inlet 5111 is larger than that of the panel air inlet 211. The inclined section 511 on the front side plate 51 of the air collecting box assembly 5 is attached to the inclined section 21 of the panel 2, and the inclination angles of the inclined section 511 and the inclined section 21 are the same, when the front side plate 51 and the inclined section 21 are tightly attached to each other, the panel air inlet 211 and the air box air inlet 5111 are aligned and communicated, and when the range hood works, oil smoke passing through the panel air inlet 211 can only enter the air box air inlet 5111 through the panel air inlet 211, then enters the inner cavity of the air collecting box assembly 5 through the air box air inlet 5111, and then is discharged out of the inner cavity of the air collecting box assembly 5 under the action of the smoke exhaust fan 6; when the oil smoke enters the oil smoke cavity of the air collecting box assembly 5 through the panel air inlet 211 and enters the air smoke cavity of the air collecting box assembly 5111 through the air box air inlet 5111, because the area of the panel air inlet 211 is long, the wind speed and the wind pressure are relatively large when the oil smoke enters the air smoke cavity of the air collecting box assembly 5 through the panel air inlet 211, if the oil smoke enters the oil smoke cavity of the air collecting box assembly 5 through the wind speed and the wind pressure, larger noise and vibration can be generated in the oil smoke cavity of the air collecting box assembly 5, and the user experience is reduced. It is easy to know that when a user is performing cooking operation, the whole flowing direction of oil smoke is upward, and because the front side plate 51 of the air collecting box assembly 5 is obliquely arranged, the panel air inlet on the panel 2 of the range hood and the air inlet 5111 of the air collecting box assembly 51 are not located right above the air flow center of the oil smoke generated during cooking, at the moment, when the exhaust fan 6 works, oil smoke is extracted, a part of power is required to change the flowing direction before the oil smoke enters the air inlet 5111 of the air collecting box, in order to ensure that the oil smoke exhausting effect of the range hood is better, the distance between the lower edge of the air inlet 5111 of the air collecting box and the air box bottom plate 53 is 3-10 cm, when the position of the air inlet 5111 of the air collecting box assembly is too low, the concentration of the oil smoke is relatively large when the oil smoke is just emitted, when the position of the air inlet 5111 of the air collecting box is too high, part of the oil smoke is diffused and overflowed when the oil smoke flows upward, so when the exhaust fan 6 works, the oil smoke cannot be completely extracted, the distance between the lower edge of the air inlet 5111 and the air inlet 5111 is 3-10 cm, so that the distance between the lower edge of the air inlet 5111 of the air inlet can be guaranteed to ensure that the range hood can be changed when the oil smoke is very low and the position of the air inlet 5111 is very low.

Referring to fig. 8, 9, 11 and 12, the range hood of the present invention, the air collecting box assembly 5 further comprises a box side plate 52 disposed at two sides of the front side plate 51, the box side plate 52 has a vertical section 521 and an expansion section 522, the vertical section 521 is located at the upper part of the box side plate 52, the expansion section 522 is located at the lower part of the box side plate 52, the expansion section 522 extends to the left and right sides and forms a cavity with the front side plate 51 with a side surface projected as big top and small bottom; the outer wall surface of the expansion 522 and the side baffle 3 enclose an intermediate chamber which is wide at the upper part and narrow at the lower part and gradually changes from the upper part to the lower part. The air collecting box assembly 5 comprises a front side plate 51, air box side plates 52, an air box bottom plate 53 and a vertically arranged air box rear plate 54, wherein the front side plate 51 is arranged at the front side of the air collecting box assembly 5 and is opposite to a user, the air box side plates 52 are arranged at the left side and the right side of the front side plate 51 and are in sealing connection with the front side plate 51, the air box bottom plate 53 is arranged at the bottom of the air collecting box assembly 5 and is connected with the air box side plates 52 at the front side plate 51 and the left side and the right side, an oil drain hole 531 is formed in the air box bottom plate 53, and waste oil dropping on the air box bottom plate 53 flows out of a cavity of the air collecting box assembly 5 through the oil drain hole 531; the vertical section 521 of the bellows side plate 52 corresponds to the vertical section 512 of the front side plate 51, the expansion section 522 of the bellows side plate 52 corresponds to the inclined section 511 of the front side plate 51, the vertical section 512 of the front side plate 51, the vertical sections 521 of the bellows side plates 52 on the left side and the right side and the corresponding parts of the bellows rear plate 54 enclose a smoke exhaust duct section of the air collecting box assembly 5, the smoke exhaust fan 6 is arranged in the smoke exhaust duct section, the expansion section 522 of the bellows side plate 52 extends towards the left side and the right side, the distance from the outer wall of the upper end of the expansion section 522 of the bellows side plate 52 to the side baffle 3 is greater than the distance from the outer wall of the lower end of the expansion section 522 of the bellows side plate 52 to the side baffle 3, a cavity with the side projected as the upper side and the lower side is formed, the cavity is sealed by the bellows rear plate 54 from the rear side, so that the cavity becomes a smoke cavity, and when the smoke exhaust fan works, the smoke cavity forms a first negative pressure zone d; when the air collecting box assembly 5 is placed in the shell, since the inclined section 511 of the front side plate 51 is obliquely arranged from top to bottom, that is, the distance from the upper end of the inclined section 511 of the front side plate 51 to the air box rear plate 54 is larger than the distance from the lower end of the inclined section 511 of the front side plate 51 to the air box rear plate 54, and the inclined section 21 is applied to the inclined section 511 of the front side plate 51 with the same inclination angle, the upper part of the shell surrounded by the inclined section 21 of the panel 2, the side baffle 3 and the back plate 4 is large and small, and when the air collecting box assembly 5 is placed in the shell, the inclined section 511 of the front side plate 51 is applied to the inclined section 21 of the panel 2, the back plate 4 is applied to the air box rear plate 54, so that the middle chamber is positioned between the outer wall surface of the expansion section 522 and the side baffle 3, and the middle chamber is a chamber which gradually changes from the upper part to the lower part; when the smoke exhaust fan 6 is started, air in the smoke exhaust fan can enter the oil smoke cavity of the air collecting box assembly 5 through the oil drain hole 531, so that external air enters the middle cavity through the air inlet gap a under the action of negative pressure, the external air flows downwards along the outer wall surface of the expansion section 522 from the upper part of the middle cavity after entering the middle cavity, and the space between the external air and the side baffle 3 is smaller and smaller due to gradual inclination change of the middle cavity from the upper part.

Referring to fig. 11 and 12, the front side plate 51 of the range hood of the present invention further includes a transition section 513, wherein the transition section 513 is vertically disposed and connects the inclined section 511 and the vertical section 512, and the width of the transition section 513 is equal to the width of the inclined section 511 and is greater than the width of the vertical section 512. When the air collection box assembly 5 is installed in the housing, since the inclined section 511 is connected with the panel 2, the width of the inclined section 511 is adapted to the width of the panel 2, but the width of the vertical section 512 is smaller than the width of the inclined section 511, i.e. the width of the vertical section 512 is smaller than the width of the panel 2, so that after the panel 2 is connected with the inclined section 511, the existence of the transition section 513 can enclose an electric control cavity with the side baffle 3 and the panel 2 of the range hood.

Referring to fig. 11 and 12, in the wind collecting box assembly 5 of the present invention, the expansion section 522 of the wind collecting box side plate 52 is divided into a first section 5221 and a second section 5222 which are disposed up and down, a lower bend 5223 with a front projection as a curve is formed between the first section 5221 and the second section 5222, an upper bend 5224 with a front projection as a curve is formed between the first section 5221 and the vertical section 521, and the height of the upper end of the inclined section 511 is lower than the height of the position where the upper bend 5224 is located. The front projection of the lower bending 5223 and the upper bending 5224 are both curved, which means that the lower bending 5223 and the upper bending 5224 are both cambered surfaces, and the cambered surfaces are used as transition surfaces, so that two surfaces which are connected with each other and have an included angle larger than zero degree can be smoothly connected. According to the wind collecting box assembly 5 disclosed by the invention, as the first section 5221 is obliquely arranged, the vertical section 521 is vertically arranged, if the upper bending 5224 is not arranged between the vertical section 521 and the expansion section 522 of the wind box side plate 52, the connection position of the vertical section 521 and the expansion section 522 is a connecting line, an included angle is formed on the appearance surface of the wind box side plate 52, meanwhile, as the inclination angles of the first section 5221 and the second section 5222 of the expansion section 522 of the wind box side plate 52 are different, the lower bending 5223 is not arranged between the first section 5221 and the second section 5222 of the expansion section 522, the connection position of the first section 5221 and the second section 5222 is a connecting line, and a protruding apex angle is formed on the appearance surface of the wind box side plate 52, so that the appearance of the wind box side plate 52 is influenced, the apex angle and the included angle are easy to break, the strength of the side plate 52 is influenced, the connection position between the vertical section 521 and the first section 5221 can be smooth, and the connection position between the first section 5221 and the second section 5222 can be smooth, and the first section 5223 can be smoothly connected between the first section 5221 and the second section 5223. In addition, since the vertical section 521 and the vertical section 512 enclose a smoke exhaust duct section, the smoke exhaust fan 6 is installed inside the smoke exhaust duct section, the chamber only needs to be matched with the size of the smoke exhaust fan 6, the vertical section 521 and the vertical section 512 are matched in height, the upper bending 5224 is connected with the first sections 5221 of the vertical section 521 and the expansion section 522, the transition section 513 is further arranged between the vertical section 512 and the inclined section 511, and the height of the upper end of the inclined section 511 is lower than that of the position where the upper bending 5224 is located.

Referring to fig. 3, 8, 9, 11 and 12, the panel 2 of the range hood of the present invention includes an inclined section 21 and a horizontal section 22, a first arc-shaped bending section 23 is disposed between the inclined section 21 and the horizontal section 22, an air inlet fixing portion 212 is disposed on a side of the inclined section 21 facing the inclined section 511, a connection structure 5112 corresponding to the air inlet fixing portion 212 is disposed on the inclined section 511, the air inlet fixing portion 212 is connected with the connection structure 5112, and the inclined section 21 and the inclined section 511 are attached and the panel air inlet 211 is communicated with the bellows air inlet 5111, and the first arc-shaped bending section 23 and the inclined section 511 form a gradually expanding noise reduction gap j. When the inclined section 21 of the panel 2 is connected with the inclined section of the front side plate 51 of the air collecting box assembly 5, the panel air inlet 211 on the inclined section 21 is connected with the connecting structure 5112 at the air box air inlet 5111 through the air inlet fixing part 212, so that the panel air inlet 211 and the air box air inlet 5111 can be connected in a sealing manner, and the oil smoke passing through the panel air inlet 211 and the air box air inlet 5111 cannot leak from the connecting position of the panel air inlet 211 and the air box air inlet 5111, so that the air inlet fixing part 212 and the connecting structure 5112 have the function of connecting the panel air inlet 211 and the air box air inlet 5111 with each other, and also have the function of sealing the connecting position of the panel air inlet 211 and the air box air inlet 5111. The tuyere fixing portion 212 is independent of a structure of the panel 2, the tuyere fixing portion 212 needs to be connected with the inclined section 21 of the panel 2 through a fixing connection portion 213, the tuyere fixing portion 212 and the inclined section 21 of the panel 2 are not of an integrated structure, a fixing connection portion 213 is arranged on one side of the panel 2 facing the wind collecting box assembly 5, the tuyere fixing portion 212 is fixed to the inner side of the panel 2 through the fixing connection portion 213, the fixing connection portion 213 is formed by bending outwards around the edge of the panel wind inlet 211, and when the inclined section 21 of the panel 2 is connected with the inclined section 511 of the front side plate 51, the tuyere fixing portion 212 is connected with the connecting structure on the front side plate 51 and enables the panel wind inlet 21 to be aligned with the wind box wind inlet 5111. Referring to fig. 17 and 18, in the illustrated embodiment, the tuyere fixing portion 212 is a plate structure, a protruding portion is formed by protruding upward from one side of the front side plate 51 of the wind collecting box assembly 5, a strip-shaped hole corresponding to the panel wind inlet 211 is formed on the protruding portion, the size of the strip-shaped hole is smaller than that of the protruding portion, a top surface is formed on the upper surface of the protruding portion, the top surface is bent toward the side where the panel 2 is located, a first connecting surface is formed, a portion of the inclined section 21 surrounding the panel wind inlet 211 is bent toward the direction where the wind collecting box assembly 5 is located, a fixed connecting portion 213 is formed, the fixed connecting portion 213 is in a flared shape, the strip-shaped hole on the tuyere fixing portion 212 is sleeved on the fixed connecting portion 213, a wind inlet is formed between the wall surface of the fixed connecting portion 213 and the first connecting surface, a portion of the protruding portion located on the outer side of the fixed connecting portion 213 and the outer wall of the fixed connecting portion 213 form a long noise reduction cavity g, and when the wind inlet is passed through the panel wind inlet 211, the long noise reduction cavity g can enter the long noise reduction cavity g through the opening of the long noise reduction cavity g, and when the wind fume passes through the panel 211 can be reduced. The connection structure 5112 on the inclined section 511 of the front side plate 51 of the air collecting box assembly 5 is a concave connection structure, one side of the air inlet 211 of the panel is far away from the air inlet fixing part 212, and is bent to form a second connection surface in the direction of the air collecting box assembly 5, when the panel 2 is connected with the inclined section 511 of the front side plate 51 of the air collecting box assembly 5, the base surface of the concave connection structure is abutted with the base surface of the air inlet fixing part 212, the second connection surface is abutted with the inner wall surface of the concave connection structure, which is far away from the side of the panel air inlet 211, and a long sealing cavity h is formed together with the concave connection structure, so that noise generated by oil smoke passing through the panel air inlet 211 is reduced. In addition, the inclined section 21 of the panel 2 faces towards one side of the air collecting box assembly 5 and the air port fixing portion 212, a sealing noise reduction piece is arranged between the air port fixing portion 212 and the inclined section, the sealing noise reduction piece is made of noise reduction cotton or cotton felt, the sealing noise reduction piece can enable the joint of the air port fixing portion 212 and the panel 2 to be sealed, and vibration to the air port fixing portion 212 can be avoided when oil smoke passes through the panel air inlet 211. After the inclined section 21 of the panel 2 is connected with the inclined section 511 of the front side plate 51, the horizontal section 22 and the first arc-shaped bending section 23 of the panel 2 are in different planes with the inclined section 511, so that a gradually expanding noise reduction gap j is formed between the first arc-shaped bending section 23 and the inclined section 511 of the front side plate 51 in the direction in which the first arc-shaped bending section 23 extends to the horizontal section 22, after the air collecting box assembly 5 is placed in the shell, external air enters the middle chamber through the air inlet gap a and flows downwards along the front side plate 51 of the air collecting box assembly 5, enters a space formed by the vertical section 512 of the front side plate 51, the top cover and the panel, and flows in a narrow direction where the noise reduction gap j is wider, and when the air enters the gradually expanding noise reduction gap j, the generated noise is attenuated by the gradually expanding noise reduction gap j.

Referring to fig. 8 and 9, the panel 2 of the range hood of the present invention further includes a lower portion 24 disposed vertically below the inclined section 21, the side baffle 3 and the back plate 4 and the portion corresponding to the lower portion 24 enclose a transition chamber below the air collecting box assembly 5 together with the lower portion 24, the bottom of the intermediate chamber is communicated with the transition chamber, the bottom of the housing is provided with an oil drop hole 271, and the oil smoke on the front side of the panel 2 is communicated with the transition chamber through the oil drop hole 271. A second arc-shaped bending section 26 is arranged between the lower part 24 of the panel 2 and the inclined section 21, the second arc-shaped bending section 26 enables the inclined section 21 to be smoothly connected with the lower part 24, air flows from the middle chamber to the transition chamber, air flow formed by the air can be guided, the lower end of the lower part 24 is bent to form a lower end face 27, at least one oil drop hole 271 is formed in the lower end face 27, and oil smoke in the air collecting box assembly 5 is dropped down onto the lower end face 27 of the panel 2 through the oil drain hole 531 and then is discharged through the oil drop hole 271 in the lower end face 27. The lower end surface 27 is fixedly connected with an oil groove sliding connection track 272, and the oil groove sliding connection track 272 is used for enabling the oil groove 9 of the range hood to slide from a disengaged state to a seated state. During the long-term oil fume extraction process, condensed liquid waste oil is deposited on the bellows bottom plate 53 of the bellows assembly 5 and drops downwards from the oil drain hole 531 on the bellows bottom plate 53 of the bellows assembly 5, the oil groove sliding connection track 272 on the lower end surface 27 is used for installing the oil groove 9, and the oil groove 9 is used for receiving the waste oil dropped from the oil drain hole 531 on the bellows bottom plate 53 of the bellows assembly 5. The oil groove 9 can be dismantled with oil groove sliding connection track 272 and be connected, when the waste oil in the oil groove 9 fills up oil groove 9, can slide oil groove 9, make oil groove 9 dismantle from oil groove sliding connection track 272, conveniently clear up oil groove 9 to the process of taking off oil groove 9 that fills up waste oil is for making oil groove 9 slide along oil groove sliding connection track 272, can avoid taking off oil groove 9 from oil groove sliding connection track 272 when, oil groove 9 rocks, makes the waste oil in the oil groove 9 unrestrained, the dirty top of a kitchen range.

Referring to fig. 3, in the range hood of the present invention, an electric control cavity b is formed between a top cover 1 and a panel 2, the electric control cavity b is communicated with an intermediate chamber, at least one guiding fan 7 is disposed in the electric control cavity b, and the guiding fan 7 exhausts air outwards through a guiding air port 221 disposed on the panel 2, thereby forming a second negative pressure region in the electric control cavity b. The panel 2 further comprises an upper connecting part 28, the upper connecting part 28 is positioned at the front end of the horizontal section 22, the guide air opening 221 is arranged on the horizontal section 22, when the panel 2 is connected with the top cover 1, the upper connecting part 28 is connected with the top cover 1, the horizontal section 22, the upper connecting part 28, the corresponding part of the side baffle 3 and the corresponding part of the front side plate 51 of the air collecting box assembly 5 enclose an electric control cavity b, a guide fan 7 is arranged in the electric control cavity b, when the oil smoke cavity is started, the guide fan 7 is started and extracts air in the electric control cavity b, and then the extracted air is discharged to the lower side of the panel 2 along the guide air opening 221 on the panel 2, so that a second negative pressure area is formed in the electric control cavity b. When a user performs cooking operation, the range hood is started and extracts the oil smoke generated above the kitchen range, but part of the oil smoke escapes upwards, the part of the oil smoke escaping upwards can be inhaled by the user, the health of the user can be influenced for a long time, the guiding fan 7 is started and extracts air in the electric control cavity b when the range hood works, the air in the electric control cavity b is extracted by the guiding fan 7 and is blown to the lower part of the panel 2 through the guiding air opening 221, the air blown by the guiding air opening 221 can be inhaled by the user when the horizontal section 22 of the panel 2 is positioned above the head of the user, and the air blown by the guiding air opening 221 forms downward flowing air flow when the air flows downwards, and the part of the air flow can generate an impact force for escaping to the oil smoke, so that the escaped oil smoke is wrapped by the range hood and extracted again, the intensity of the oil smoke extracted by the range hood can be improved, and the air quality of a cooking environment of the user is improved. It should be understood that the horizontal section 22 of the panel 2 may be a horizontal plane parallel to the cooking bench, at this time, the air blown by the air guiding port 221 flows vertically downward to form downward airflow, when the upward escaping oil smoke encounters the part of airflow, the downward airflow is pressed down and is extracted by the range hood again, when the part of the oil smoke not impacted by the downward flowing airflow rises to the horizontal section 22 of the panel 2, the part of the oil smoke guided by the horizontal section 22 of the panel 2 and located below the horizontal section 22 of the panel 2 flows downward and is extracted by the range hood, and the horizontal section 22 of the panel 2 forms a guiding surface of the oil smoke; the vertical downward projection of the guide air opening 221 exceeds the vertical downward projection boundary of the panel air inlet 211, so that the distance between the leftmost end surface of the guide air opening 221 and the left side of the panel 2 is smaller than that between the left side of the panel air inlet 211 and the left side of the panel 2, and the distance between the rightmost end surface of the guide air opening 221 and the right side of the panel 2 is smaller than that between the right side of the panel air inlet 211 and the right side of the panel 2, and thus the downward exhaust air flow through the guide air opening 221 can play a blocking role on the oil smoke escaping from the left side and the right side of the panel air inlet 211, the outward escape of the oil smoke can be avoided, and the extraction effect of the range hood on the oil smoke is better.

Referring to fig. 8 and 9, the upper connecting portion 28 of the range hood of the present invention includes a vertical folding section 281 and a free end horizontal section 282 formed by bending a free end of the vertical folding section 281, the free end horizontal section 282 is abutted against the top cover 1, the upper end of the side baffle 3 is provided with a circular arc bending portion 31, a bending connecting section 311 is formed on the bending portion 31, the bending connecting section 311 is horizontally arranged, the bending connecting section 311 is in the same horizontal plane with the free end horizontal section 282 and abutted against the top cover 1, and when the top cover 1 is connected with the panel 2 and the side baffle 3, the front end and the left and right ends of the top cover 1 are respectively disposed on the free end horizontal section 282 and the bending connecting section 311; the vertical folding section 281 comprises a first vertical folding section 2811, a connecting section 2812 and a second vertical folding section 2813, two ends of the connecting section 2812 are respectively connected with one ends of the first vertical folding section 2811 and the second vertical folding section 2813, the other end of the first vertical folding section 2811 is connected with a horizontal section 22, the other end of the second vertical folding section 2813 is bent to form a free end horizontal section 282, the first vertical folding section 2811 and the second vertical folding section 2813 are parallel to each other, the height of the first vertical folding section 2811 is smaller than that of the second vertical folding section 2813, a bending surface 312 is formed at the front end of the bending part 31, the bending surface 312 is positioned at the same angle with the second vertical folding section 2813, the bending surface 312 is connected with the second vertical folding section 2813, the connecting section 2812 corresponds to the extension of the horizontal section 22 of the panel 2, the width of the horizontal section 22 in the front-back direction of the panel 2 is increased, a negative pressure area is formed near the panel air inlet when the panel is operated, the air flowing backwards to the panel 2813 flows to the position of the panel 2812, and then the smoke can be prevented from escaping upwards by the first vertical folding section 2811. In addition, since the horizontal segment 22 of the panel 2 is connected to the first vertical hemming segment 2811 of the panel 2, during the processing, the horizontal segment 22 of the panel 2 may be a horizontal plane parallel to the cooking bench, so that the horizontal segment 22 of the panel 2 is only used as a guiding surface for the upward-overflowed oil smoke, so that the oil smoke overflowed upward and rising to the horizontal segment 22 can be guided and extracted by the range hood again, in other embodiments, the horizontal segment 22 of the panel 2 may be a slope near one end of the first vertical hemming segment 2811 and slightly tilted upward, so long as the slope of the slope is small enough not to affect the guiding effect of the horizontal segment 22 of the panel 2, and meanwhile, the processing precision of the panel 2 is reduced.

Referring to fig. 10, the side baffle 3 of the range hood of the present invention includes a first wall 32 facing the fume space, a second wall 33 facing the outside, and a plate-shaped cavity formed between the first wall 32 and the second wall 33; the plate-shaped cavity is a rectangular cavity or a cavity with a large upper part and a small lower part, the square of the thickness of the plate-shaped cavity is far smaller than the area of the plate-shaped cavity, a bending part 31 facing to the first wall surface 32 is formed on the top of the second wall surface 33, a bending connecting section 311 is formed on the bending part 31, a bending surface 312 is formed at the front end of the bending part 31, the bending surface 312 is positioned at the same angle with the first vertical folding section 2811 of the panel 2, and the bending surface 312 is connected with the first vertical folding section 2811 of the panel 2. The side baffle 3 has a double-layer structure, the first wall surface 32 has an inner wall of the double-layer structure, the second wall surface 33 has an outer wall of the double-layer structure, the space between the first wall surface 32 and the second wall surface 33 is a plate-shaped cavity defined by the first wall surface 32 and the second wall surface 33, the upper end of the plate-shaped cavity has an opening, that is, the upper end of the first wall surface 32 is not in sealing connection with the upper end of the second wall surface 33, the second wall surface 33 is provided with a bending part 31 facing the first wall surface 32 at the top, a bending connecting section 311 is formed at the bending part 31, the connecting section 311 is connected with the top cover 1, the panel 2 is formed with the connection face 25 of bending in the left and right sides between lower terminal surface 27 and the upper junction 28, the connection face 25 of bending and the inboard edge sealing connection of the first wall 32 of corresponding side, when the lampblack absorber is during operation, the outside air that gets into the intermediate chamber also can get into the platy cavity that forms between first wall 32 and the second wall 33, because the side shield 3 is bilayer structure, the entering air in the platy cavity makes platy cavity form the bilateral structure that has the air intermediate layer, can play noise reduction and shock attenuation's effect, noise and vibration that the air current in the collection bellows produced can further be reduced when the lampblack absorber is during operation. In application, the weight and occupied space of the side baffle 3 need to be considered, so the distance between the first wall surface 32 and the second wall surface 33 of the thickness of the side baffle 3 is far smaller than the distance between the height from the upper end to the lower end of the second wall surface of the height of the side baffle 3 and the front side and the rear side of the depth side baffle 3, the square of the thickness of the plate-shaped cavity is far smaller than the area of the plate-shaped cavity, the structure does not influence the space occupied by the side baffle 3, the gap of the plate-shaped cavity is smaller, and the small gap silencing effect is better.

Referring to fig. 3, in the range hood of the present invention, the outer wall surface of the side plate 52 of the bellows and the housing enclose a wide upper portion and a narrow lower portion, and the depth of the first wall surface 32 and the second wall surface 33 gradually decreases from top to bottom, and the plate-shaped cavity formed between the first wall surface 32 and the second wall surface 33 is also a cavity with a large upper portion and a small lower portion. The first wall surface 32 has a smaller area than the second wall surface 33, and forms a relief surface with a larger inner side and a smaller outer side on the same plane, and the edge of the relief surface is defined by the edge of the first wall surface 32 and forms a relief space with the second wall surface 33. That is, the upper end of the first wall 32 or a part of the upper end of the first wall 32 is not connected with the upper end of the second wall 33, and the upper end of the first wall 32 is closer to the user than the upper end of the first wall 32 is farther away from the user, that is, the upper end of the first part is gradually inclined downwards from front to back, the part of the first wall 32 lower than the second wall 33 forms a relief surface, the edge of the relief surface is defined by the edge of the upper end of the first wall 32, and the width of the inner side of the relief surface is greater than the width of the outer side, so that when the side baffle 3 is used on the range hood, the edge of the panel of the range hood is connected with the side baffle 3 along the edge of the inner side of the first wall 32, the relief 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 relief surface increases the area of the air inlet when the air flow in the transitional air cavity enters the plate-shaped cavity.

In the range hood, a third negative pressure region is formed outside the panel air inlet 211 on the panel 2, and air exhausted from the guide air inlet 221 arranged on the panel 2 by the guide fan 7 enters the third negative pressure region and enters the first negative pressure region d through the panel air inlet 211 and the air box air inlet 5111. When the range hood works, the smoke exhaust fan 6 is started, the smoke exhaust fan extracts air in the middle cavity and discharges the air outwards, the middle cavity forms a first negative pressure zone d, the first negative pressure zone d is communicated with a space in front of the panel 2 through the panel air inlet 211, a large amount of smoke is generated in the cooking process of a user, a high pressure zone is formed above the cooker, the air pressure of the high pressure zone is larger than the air pressure at the air inlet of the panel 2, the air flows from the high pressure zone to the low pressure zone, so that the smoke generated by the cooker flows to the position of the panel air inlet 211, when the smoke does not flow to the panel air inlet 211, the air outside the panel air inlet 211 is sucked into the first negative pressure zone d because the air pressure at the panel air inlet 211 is higher than the air pressure of the first negative pressure zone d, and therefore, when the air exhausted from the guide air inlet 221 arranged on the horizontal section 22 of the panel 2 of the guide fan 7 flows to the third negative pressure zone and is sucked into the first negative pressure zone d under the action of the smoke exhaust fan 6.

Referring to fig. 1 to 3, the range hood of the present invention further includes a peripheral plate 8, the peripheral plate 8 is disposed on an outer vertical surface of the air duct via hole 11, a C-shaped thin air inlet channel C is formed between the peripheral plate 8 and an outer wall surface of the smoke exhaust air duct section, and the thin air inlet channel C is communicated with the air inlet gap a and the electric control cavity b. The peripheral plate 8 is arranged outside the smoke exhaust duct section, and a noise reduction gap is formed between the peripheral plate 8 and the vertical sections 512 and 521 of the front side plate 51 and the left and right side bellows side plates 52 of the air collecting box assembly 5. The top cover 1 is provided with a coaming connecting part 12 around the inner wall of the air passage through hole 11, and the peripheral coaming 8 is arranged on the coaming connecting part 12. A C-shaped thin air inlet channel C is formed between the outer peripheral plate 8 and the outer wall surface of the smoke exhaust air channel section of the air collecting box assembly 5, 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 outer peripheral plate 8 and air on the outer wall surface of the smoke exhaust air channel section, heat generated by the smoke exhaust air channel section is transmitted outwards due to the existence of the interlayer, noise generated when the smoke exhaust fan 6 works and noise generated when the smoke exhaust fan flows along the air collecting box and is discharged outwards through the smoke exhaust air channel section are also silenced by the interlayer. In addition, the outer peripheral plate 8 surrounds the left and right sides and the side facing the user of the smoke exhaust duct section of the air collecting box, the outer peripheral plate 8 forms the appearance surface of the part, and the parts of the smoke exhaust duct section arranged on the air collecting box assembly 5 can be covered by the outer peripheral plate 8, so that the appearance surface of the range hood can be attractive.

Referring to fig. 13 to 24, in other embodiments, the top cover 1 and the side baffles 3 of the range hood are integrally formed, and further include a supporting portion 13 connecting the side baffles 3 on the left and right sides, wherein the cross section of the supporting portion 13 is U-shaped and forms an oil sump, and at least one oil outlet 131 is provided on the bottom surface of the oil sump formed by the supporting portion 13; an air passage hole 11 is formed at the rear side of the top cover 1, and a coaming connecting part 12 is arranged at the periphery of the air passage hole 11; the air duct through hole 11 is used for enabling the exhaust air duct section of the air collecting box assembly 5 to pass through and form an air inlet gap a with the outer wall surface of the exhaust air duct section, the top cover 1 is upwards extended at the edges of the left side and the right side of the air duct through hole 11 to form an air collecting box connecting part 14 connected with the air box side plate 52 of the air collecting box assembly 5, the vertical section 521 of the air box side plate 52 of the air collecting box assembly 5 is provided with an air duct connecting hole 5211 corresponding to the air collecting box connecting part 14, after the exhaust air duct section of the air collecting box assembly 5 passes through the air duct through hole 11, a screw passes through a screw hole on the air collecting box connecting part 14 and the air duct connecting hole 5211 to connect the air collecting box assembly 5 with the top cover 1, and the part of the air collecting box assembly 5 below the vertical section 521 is installed in a shell. The front side of the top cover 1 extends downwards to form a front plate 15 with an appearance surface, the left end and the right end of the front plate 15 extend to the side baffle 3 on the corresponding side and are connected with the side baffle 3 on the corresponding side, the panel 2 comprises an inclined section 21 and a horizontal section 22, a first arc-shaped bending section 23 is arranged between the inclined section 21 and the horizontal section 22, two sides of the inclined section 21 are connected with the side baffle 3 on the corresponding side, an upper connecting part 28 used for being connected with the front plate 15 is arranged on the horizontal section 22 of the panel 2, and the lower end of the inclined section 21 is bent to form a lower end surface 27. In the illustrated embodiment, the supporting portion 13 is provided with a groove 132 and first connecting holes 133, each first connecting hole 133 is aligned with one groove 132, the lower end surface 27 of the panel 2 is provided with a protruding block 273 corresponding to the groove 132 and a second connecting hole 274 corresponding to the first connecting hole 133, when the lower end surface 27 of the panel 2 is connected with the supporting portion 13, the protruding block 273 is clamped into the groove 132, and then the first connecting hole 133 and the second connecting hole 274 are fixed by a screw penetrating through the two holes; of course, after the protrusions 273 are snapped into the grooves 132, the supporting portion 13 and the lower end surface 27 of the panel 2 may be bonded together by an adhesive layer. The width of the lower end surface 27 of the panel 2 is smaller than the width of the bottom of the supporting portion 13, and when the lower end surface 27 of the panel 2 is connected to the supporting portion 13, the lower end surface 27 of the panel 2 does not cover the oil outlet 131 on the supporting portion 13, so that after the lower end surface 27 of the panel 2 is connected to the supporting portion 13, the waste oil in the oil sump formed by the supporting portion 13 still can drop down through the oil outlet 131. The side baffle 3 is turned forwards to form a first folded edge 34 with an L-shaped cross section, the first folded edge 34 comprises a first connecting surface 341 connected with the side baffle 3 and a second connecting surface 342 connected with the first connecting surface 341, the first connecting surface 341 is vertical to the side baffle 3, the second connecting surface 342 is parallel to the side baffle 3, two sides of the panel 2 are provided with bending connecting surfaces 25, the bending connecting surfaces 25 positioned at two sides of the inclined section 21 are connected with the second connecting surface 342 which is parallel to the side baffle 3 and the first folded edge 34, and the first folded edge and the second folded edge can be connected through screws or can be bonded through an adhesive layer; the lower end of the front plate 15 is folded to form a second folded edge 151 with an L-shaped cross section, the second folded edge 151 comprises a first folded surface 1511 connected with the front plate 15 and a second folded surface 1512 connected with the first folded surface 1511, the first folded surface 1511 is vertical to the front plate 15, the second folded surface 1512 is parallel to the front plate 15, the folded connection surfaces 25 on two sides of the horizontal section 22 are connected with the second folded surfaces 1512 in the parts of the second folded edge 151 on two sides of the front plate 15, the upper connection part 28 comprises a buckle 283 and a connecting sheet 284, a buckle hole corresponding to the buckle 283 is formed in the first folded surface 1511 of the part of the second folded edge 151 on the front plate 15, the first folded surface 1511 of the part of the second folded edge 151 on the front plate 15 is connected with the connecting sheet 284 through a screw, when the horizontal section 22 is connected with the front plate 15, the folded connection surfaces 25 on two sides of the horizontal section 22 are connected with the second folded surfaces 1512 in the parts of the two sides of the front plate 15 through a screw, and can also be connected through a glue layer, the buckle 283 extends into the second folded surface of the front plate on the part of the front plate 15 on the front plate 15 through the second folded surface 1511 and the second folded surface on the front plate on the side surface of the connecting sheet 1511 is connected with the front plate through the screw; the top cap 1 still includes locates top cap 1 left and right sides and the cigarette baffle 16 of being connected with side shield 3, and cigarette baffle 16 is connected with first junction surface 341, and the part between two cigarette baffles 16 is the oil smoke space, simultaneously in order to make the user have better experience, the cigarette baffle 16 adopts can adopt transparent glass material. The range hood is different from the previous embodiment in that the top cover 1, the panel 2 and the side baffles 3 are different in structure, the electric control cavity b is formed by enclosing the front plate 15, the horizontal section 22 and the left and right side baffles 3, but the middle chamber, the first negative pressure area d, the second negative pressure area, the third negative pressure area, the long noise reduction cavity g, the long sealing cavity f, the noise reduction gap j and the like are formed and have the same functions as those of the previous embodiment, so that the text is concise and will not be repeated here.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.

Claims (10)

1. The utility model provides a lampblack absorber, includes casing, its characterized in that: the shell comprises a top cover (1), a panel (2), a left side baffle (3) and a right side baffle (4), and comprises a wind collecting box assembly (5), wherein the wind collecting box assembly (5) is arranged in the shell, a wind collecting box air inlet (5111) and a wind box air outlet are formed in the wind collecting box assembly (5), a smoke exhaust fan (6) is arranged between the wind collecting box air inlet (5111) and the wind box air outlet, an intermediate chamber is formed between the outer wall surface of the wind collecting box assembly (5) and the inner wall surface of the shell, the wind collecting box assembly (5) is provided with at least one oil drain hole (531), and the oil drain hole (531) is communicated with the inner cavity of the wind collecting box assembly (5) and the intermediate chamber.

2. The range hood according to claim 1, characterized in that the smoke exhaust fan (6) is operated and a first negative pressure zone (d) is formed between a wind box air inlet (5111) in the wind collecting box assembly (5) and the smoke exhaust fan (6), the oil drain hole (531) is positioned in the first negative pressure zone (d), and air in the middle chamber enters the first negative pressure zone (d) through the oil drain hole (531).

3. A range hood according to claim 1, characterized in that the panel (2) has an inclined section (21), an elongated panel air inlet (211) being horizontally provided on the inclined section (21); the air collecting box assembly (5) comprises a front side plate (51), the front side plate (51) comprises an inclined section (511) and a vertical section (512), the inclined section (511) has the same inclination angle as the inclined section (21), the air collecting box air inlet (5111) is arranged at the corresponding position of the inclined section (511) and the panel air inlet (211), and the area of the air collecting box air inlet (5111) is larger than that of the panel air inlet (211).

4. The range hood according to claim 1, wherein the air collecting box assembly (5) further comprises air box side plates (52) arranged on two sides of the front side plate (51), the air box side plates (52) are provided with vertical sections (521) and expansion sections (522), the vertical sections (521) are arranged on the upper parts of the air box side plates (52), the expansion sections (522) are arranged on the lower parts of the air box side plates (52), and the expansion sections (522) extend to the left and right sides and form cavities with the front side plate (51) in a side projection mode of being large in upper part and small in lower part; the outer wall surface of the expansion section (522) and the side baffle (3) enclose an intermediate chamber which is wide at the upper part and narrow at the lower part and gradually changes from the upper part to the lower part.

5. A range hood according to claim 3, wherein the panel (2) comprises an inclined section (21) and a horizontal section (22), a first arc-shaped bending section (23) is arranged between the inclined section (21) and the horizontal section (22), a tuyere fixing portion (212) is arranged on one side of the inclined section (511) facing the inclined section (21), a connecting structure (5112) corresponding to the tuyere fixing portion (212) is arranged on the inclined section (511), the tuyere fixing portion (212) is connected with the connecting structure (5112), the inclined section (21) is attached to the inclined section (511) and the panel air inlet (211) is communicated with the air box air inlet (5111), and the first arc-shaped bending section (23) and the inclined section (511) form a gradually expanding noise reduction gap (j).

6. The range hood according to claim 5, characterized in that the face plate (2) further comprises a lower portion (24) which is located below the inclined section (21) and is vertically arranged, the side baffle (3) and the back plate (4) and the corresponding portion of the lower portion (24) and the lower portion (24) together enclose a transition chamber located below the air collecting box assembly (5), the bottom of the middle chamber is communicated with the transition chamber, an oil dripping hole (271) is formed in the bottom of the shell, and oil smoke on the front side of the face plate (2) is communicated with the transition chamber through the oil dripping hole (271).

7. A range hood according to any one of claims 1 to 6, characterized in that an electric control chamber (b) is formed between the top cover (1) and the panel (2), the electric control chamber (b) is communicated with the intermediate chamber, at least one guiding fan (7) is arranged in the electric control chamber (b), and the guiding fan (7) exhausts air outwards through a guiding air port (221) arranged on the panel (2), so that a second negative pressure area is formed in the electric control chamber (b).

8. The range hood according to claim 7, wherein the top cover (1) is provided with an air duct through hole (11), the air duct through hole (11) is used for enabling the exhaust air duct section of the air collecting box assembly (5) to pass through and form an air inlet gap (a) with the outer wall surface of the exhaust air duct section, and air outside the range hood enters the middle chamber through the air inlet gap (a) and enters the first negative pressure zone (d) through the oil drain hole (531); air outside the smoke ventilator enters the second negative pressure area through the air inlet gap (a), and is discharged out of a guide air opening (221) arranged on the panel (2) through the guide fan (7).

9. The range hood according to claim 8, wherein a third negative pressure area is formed outside a panel air inlet (211) on the panel (2), and air discharged from a guide air inlet (221) arranged on the panel (2) by the guide fan (7) enters the third negative pressure area and enters the first negative pressure area (d) through the panel air inlet (211) and the bellows air inlet (5111).

10. The range hood according to claim 8, further comprising a peripheral plate (8), wherein the peripheral plate (8) is arranged on an outer vertical surface of the air duct through hole (11), a C-shaped thin air inlet channel (C) is formed between the peripheral plate (8) and an outer wall surface of the smoke exhaust air duct section, and the thin air inlet channel (C) is communicated with the air inlet gap (a) and the electric control cavity (b).