CN216814291U - Fume exhaust fan - Google Patents

Abstract

The utility model discloses a range hood, which relates to the technical field of range hoods and comprises a main fan assembly, a smoke collecting cover, at least one oil smoke channel, a valve plate and a driving assembly. The main fan assembly comprises a first air inlet and a first air outlet. The smoke collecting cover is communicated with the first air inlet, one side, far away from the main fan assembly, of the smoke collecting cover is provided with a main air inlet, and the smoke collecting cover is provided with at least one auxiliary air inlet. At least one oil smoke channel is arranged in the smoke collecting cover, the first end of the oil smoke channel is communicated with the auxiliary air inlet, and the second end of the oil smoke channel is communicated with the first air inlet. The valve plate has relative first end and second end, and wherein, first end is articulated with the inside of oil smoke passageway, and the second end is the free end. The driving assembly is arranged on the oil smoke channel and used for driving the second end of the valve plate to be attached to one side, far away from the main fan assembly, of the oil smoke channel. The second end of the driving valve plate is attached to one side, close to the main fan assembly, of the oil smoke channel.

Description

Fume exhaust fan

Technical Field

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

Background

Under the normal operating condition of range hood, when the oil smoke is more, because whole oil smoke can not be held up to the collection petticoat pipe, a part oil smoke can spill over by the both sides of collection petticoat pipe to enter into indoorly, influence indoor air quality. In order to reduce the oil smoke leakage, a plurality of gears are usually arranged on the oil smoke suction machine, and the power of the oil smoke suction machine is increased by adjusting the gears, so that the gas collection amount of the smoke collection cover is improved, and the oil smoke amount overflowing from the two sides of the smoke collection cover is reduced. However, when the power of the range hood is increased, not only the power consumption is increased, but also the noise is increased.

In this case, although the oil smoke channels may be disposed at two sides of the smoke collecting cover to guide the oil smoke at two sides of the smoke collecting cover to the common flue, when the range hood stops working, a part of the oil smoke in the oil smoke channels may run out of the oil smoke channels to the indoor, thereby affecting the indoor air quality.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a range hood which can prevent oil smoke in an oil smoke channel from escaping into a room.

In order to achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:

the embodiment of the utility model provides a range hood which comprises a main fan assembly, a smoke collecting cover, at least one oil smoke channel, a valve plate and a driving assembly. Wherein, this main fan subassembly includes first air intake and first air outlet. The smoke collecting cover is communicated with the first air inlet, a main air inlet is formed in one side, away from the main fan assembly, of the smoke collecting cover, and at least one auxiliary air inlet is formed in the smoke collecting cover. At least one oil smoke channel is arranged in the smoke collecting cover, the first end of the oil smoke channel is communicated with the auxiliary air inlet, and the second end of the oil smoke channel is communicated with the first air inlet. The valve plate has relative first end and second end, and wherein, first end is articulated with the inside of oil smoke passageway, and the second end is the free end. The driving assembly is arranged on the oil smoke channel and used for driving the second end of the valve plate to be attached to one side, far away from the main fan assembly, of the oil smoke channel. And the second end of the driving valve plate is attached to one side, close to the main fan assembly, of the oil smoke channel.

The embodiment of the utility model provides a range hood, wherein a first air inlet of a main fan assembly is communicated with a smoke collecting cover, the smoke collecting cover is provided with a main air inlet and an auxiliary air inlet, and the auxiliary air inlet is communicated with the first air inlet through a smoke channel in the smoke collecting cover. Under the condition, when the main fan assembly works, negative pressure is formed in the main fan assembly, and most of gas at the main air inlet on one side of the smoke collecting cover, which is far away from the main fan assembly, flows into the main fan assembly. The gas near the side wall of the smoke collecting cover can enter the smoke collecting cover through the auxiliary air inlet, then enters the oil smoke channel through the first end of the oil smoke channel, and enters the main fan assembly through the second end of the oil smoke channel. Finally, the gas in the smoke collecting hood can be discharged to the public flue through the first air outlet. Therefore, under the negative pressure of the main fan assembly, gas near the side wall of the smoke collecting cover can be discharged through the oil smoke channel, so that the user experience is improved, the structure of the oil smoke channel is simple, the manufacturing cost is low, and the production is easy.

In addition, because the first end of valve block is articulated with the inside of oil smoke passageway, the second end is the free end. When near the lateral wall of collection petticoat pipe does not have the oil smoke, close the oil smoke passageway, at this moment, the second end that drive assembly can drive the valve block is held to the oil smoke passageway and is kept away from one side laminating of main fan subassembly, and the valve block can keep apart the space in the oil smoke passageway to form blocking to gaseous in the oil smoke passageway. Thereby avoiding the gas in the main fan component from overflowing from the auxiliary air inlet connected with the oil smoke channel. When there is the oil smoke near the lateral wall of collection petticoat pipe, drive assembly can drive the second end of valve block and laminate to one side that the oil smoke passageway is close to the main fan subassembly, and the valve block is opened for the oil smoke passageway this moment, and the oil smoke of auxiliary air intake department can enter into the oil smoke passageway by auxiliary air intake in to discharge to public flue after entering into the main fan subassembly. Therefore, the valve plate and the driving assembly are matched to block the oil smoke channel as required, and the oil smoke is prevented from running out of the oil smoke channel to influence the indoor air quality when the range hood stops working.

Furthermore, the oil smoke channel is provided with a mounting opening. The driving assembly is an electromagnet which is arranged at the mounting opening. The range hood also comprises a power supply which is electrically connected with the electromagnet. The valve plate is made of a magnetic material.

Furthermore, the range hood also comprises an auxiliary fan assembly; the auxiliary fan assembly is arranged in the oil smoke channel and is positioned on one side, close to the auxiliary air inlet, of the valve block.

Further, this oil smoke passageway includes first passageway and second passageway. The first end of the first channel is communicated with the first air inlet, and the first channel is arranged close to the main fan assembly. The first end of the second channel is communicated with the second end of the first channel, the second end of the second channel is communicated with the auxiliary air inlet, and the second channel is far away from the main fan assembly. Wherein, supplementary fan subassembly sets up in the second passageway.

Further, the auxiliary fan assembly comprises an auxiliary volute and an auxiliary fan, wherein the auxiliary volute is arranged in the second channel, and the auxiliary volute is provided with two opposite second air inlets and one second air outlet. The second air outlet faces the first end of the second channel; at least one second air inlet has a gap with the inner wall of the second channel. The auxiliary fan is arranged in the auxiliary volute and is provided with a third air inlet and a third air outlet. The third air inlet is communicated with the second air inlet of the auxiliary volute, and the third air outlet is communicated with the second air outlet of the auxiliary volute.

Further, the range hood further comprises a box body, the box body is provided with a box body accommodating cavity, and a box body air inlet and a box body air outlet are formed in the box body accommodating cavity. The main fan assembly is located the box and holds the intracavity, and the first air outlet of main fan assembly is towards box air outlet one side, and the box air intake is linked together with the first air intake of main fan assembly. The first end of the first channel is communicated with the box body accommodating cavity of the box body.

The range hood further comprises a first folded edge and a second folded edge, wherein the first folded edge is arranged around the edge of the first end of the first channel and is connected with the box body. The second flange is arranged around the second end edge of the second channel and is connected with the smoke collecting cover.

Further, the at least one auxiliary air inlet comprises a first auxiliary air inlet and a second auxiliary air inlet. The first auxiliary air inlet and the second auxiliary air inlet are respectively arranged on two opposite side walls of the fume collecting hood. The at least one oil smoke passage comprises a first oil smoke passage and a second oil smoke passage.

The first end of the first oil smoke channel is communicated with the first air inlet, and the second end of the first oil smoke channel is communicated with the first auxiliary air inlet. The first end of the second oil smoke channel is communicated with the first air inlet, and the second end of the second oil smoke channel is communicated with the second auxiliary air inlet.

Furthermore, the range hood also comprises a support plate, and the first end of the support plate is connected with the second channel; the second end of the supporting plate is connected with the smoke collecting cover.

Further, the main fan assembly includes a main volute, an impeller, and a motor. The main volute is provided with a fourth air inlet and a fourth air outlet, the main volute is arranged in the box body, the fourth air inlet of the main volute is communicated with the air inlet of the box body, and the fourth air outlet is communicated with the air outlet of the box body. The impeller is arranged in the main volute. The motor is arranged in the main volute and used for driving the impeller to rotate relative to the main volute.

Further, the range hood also comprises a controller and a smoke sensor, wherein the controller is electrically connected with the driving assembly. The smoke sensor is electrically connected with the controller, the smoke sensor is arranged at the auxiliary air inlet and used for detecting oil smoke and sending a detection result to the controller, and the controller compares the detection result with a preset threshold value.

If the detection result is larger than the preset threshold value, the controller sends a first control instruction to the driving assembly. The first control instruction is used for indicating the second end of the driving valve plate of the driving component to be attached to one side, close to the main fan component, of the oil smoke channel. And if the detection result is smaller than or equal to the preset threshold value, the controller sends a second control instruction to the driving assembly. The second control instruction is used for indicating the second end of the driving valve plate of the driving component to be attached to one side, far away from the main fan component, of the oil smoke channel.

Drawings

Fig. 1 is a front view of a range hood according to an embodiment of the present disclosure;

fig. 2 is a schematic partial sectional view of a range hood provided in an embodiment of the present application;

fig. 3 is a schematic view of a smoke channel provided in the embodiment of the present application;

FIG. 4 is a schematic view of the valve plate shown in FIG. 3 according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of the drive assembly of FIG. 3 according to an embodiment of the present disclosure;

fig. 6 is a partial cross-sectional schematic view of another range hood provided in the embodiment of the present application;

fig. 7 is a schematic view of another lampblack channel provided in the embodiment of the present application;

fig. 8 is a schematic view of another lampblack channel provided in the embodiment of the present application;

fig. 9 is a schematic view of another lampblack channel provided in the embodiment of the present application;

FIG. 10 is a schematic illustration of a main fan assembly and a smoke collection cage docking provided by an embodiment of the present application;

fig. 11 is a schematic view of another lampblack channel provided in the embodiment of the present application;

fig. 12 is a schematic view illustrating a butting of the oil smoke passage and the box body according to the embodiment of the present application;

FIG. 13 is a schematic view of the case of FIG. 12 according to an embodiment of the present application;

fig. 14 is a partial cross-sectional schematic view of another range hood provided in the embodiment of the present application;

FIG. 15 is a schematic top view of FIG. 3 according to an embodiment of the present application;

fig. 16 is a schematic view of another range hood provided in the embodiment of the present application;

FIG. 17 is a schematic diagram illustrating a positional relationship between a main blower assembly and a housing provided in an embodiment of the present application;

fig. 18 is a schematic view illustrating a relationship between an auxiliary fan assembly and a smoke channel according to an embodiment of the present disclosure;

fig. 19 is an electrical connection diagram of a portion of a range hood according to an embodiment of the present disclosure;

fig. 20 is a schematic view illustrating a relationship between another auxiliary fan assembly and a smoke passage according to an embodiment of the present application.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Common range hoods include a top draft type and a side draft type. The top-suction type range hood adopts the oil smoke rising principle, generates a negative pressure area right above a cooking bench, sucks and exhausts naturally rising oil smoke generated during cooking, and has the advantages of fashionable and concise appearance, larger air volume, larger space suitability and capability of catching oil smoke far away from the cooking bench. The cooking range has the disadvantages that the mounting height is far away from the cooking range, and under the cooking state with small oil smoke amount, the oil smoke above the pot is easy to be disturbed by the ambient air to cause the oil smoke to escape to the periphery, so that the oil smoke absorption effect is poor. The side-suction type range hood has the advantages that the side-suction type range hood is thin in body and not easy to touch in operation, and has a good oil smoke suction effect because the installation height is low and the negative pressure area is close to a smoke source in a cooking state with small oil smoke amount.

Although the existing range hood can suck the oil smoke as much as possible through the arrangement of the smoke collecting hood, if the generated oil smoke is large in quantity or has external airflow disturbance (such as windowing or people walking back and forth), the oil smoke is easy to escape from the positions at the two sides of the smoke collecting hood. In addition, the kitchen oil smoke has complex components, mainly including PM2.5, PM5 and PM10 particles composed of aldehyde, ketone, hydrocarbon, fatty acid, alcohol, aromatic compound and the like, and large particles such as transpiration liquefied oil drops and water drops with the diameter larger than 10 um. Therefore, the smoke suction efficiency of the range hood can be reduced, and if the phenomenon of oil smoke escaping is generated, the environment of a kitchen is easily influenced, and the health of a user is also influenced.

In addition, no matter the range hood is the top suction type or the side suction type, when the oil smoke on the cooking bench is great, under the certain condition of power that does not change the range hood, excessive cigarette problem can appear in the both sides that the collection petticoat pipe is close to the cooking bench, because the coanda effect, the oil smoke that overflows can flow along collection petticoat pipe lateral wall, not only can influence the cleanliness of collection petticoat pipe lateral wall, and the oil smoke can spread in indoor air moreover. When the oil smoke on the cooking bench is large, if the suction force of the range hood is adjusted by the power of the range hood, not only can large noise be generated, but also the use cost of a user can be increased. Although the oil smoke channel can be arranged to guide out the oil smoke on the side wall of the smoke collection cover, if the range hood stops working, a part of the oil smoke will escape from the oil smoke channel to affect the indoor air quality, so that the range hood provided by the embodiment of the utility model as shown in fig. 1 can reduce the overflow of the oil smoke near the side wall of the smoke collection cover and prevent the oil smoke in the oil smoke channel from escaping.

As shown in fig. 2, the range hood 100 includes a smoke collecting cover 1, a main fan assembly 2 and at least one smoke passage 3. Wherein, the main blower assembly 2 includes a first air inlet 21 and a first air outlet 22. The exhaust fume collecting hood 1 is communicated with the first air inlet 21, a main air inlet 11 is formed in one side, away from the main fan assembly 2, of the exhaust fume collecting hood 1, and at least one auxiliary air inlet 12 is formed in the exhaust fume collecting hood 1. At least one oil smoke channel 3 is arranged in the smoke collecting cover 1 (the outer cover 102 of the smoke collecting cover 1 is not shown in the figure), a first end of the oil smoke channel 3 is communicated with the auxiliary air inlet 12, and a second end of the oil smoke channel 3 is communicated with the first air inlet 21.

In addition, the range hood 100 may further include a valve plate 4 shown in fig. 3 and a driving assembly 5 shown in fig. 5, wherein, as shown in fig. 4, the valve plate 4 has a first end a and a second end b opposite to each other, the first end a is hinged with the inside of the soot passage 3, and the second end b is a free end. The driving assembly 5 is disposed on the oil smoke channel 3 shown in fig. 3, and is used for attaching the second end b of the driving valve plate 4 to one side of the oil smoke channel 3 far away from the main fan assembly 2. And the second end b of the driving valve plate 4 is attached to one side of the oil smoke channel 3 close to the main fan component 2.

Thus, as shown in fig. 6 (the direction of the arrow is the gas flow direction), the first air inlet 21 of the main fan assembly 2 is communicated with the smoke collecting hood 1, because the smoke collecting hood 1 is provided with the main air inlet 11 and the auxiliary air inlet 12, and the auxiliary air inlet 12 is communicated with the first air inlet 21 through the smoke channel 3 in the smoke collecting hood 1. In this case, when the main fan assembly 2 is operated, negative pressure is formed in the main fan assembly 2, and most of the gas at the main air inlet 11 on the side of the smoke collecting hood 1 away from the main fan assembly 2 flows into the main fan assembly 2. Gas near the side wall of the smoke collecting cover 1 can enter the smoke collecting cover 1 through the auxiliary air inlet 12, then enters the oil smoke channel 3 through the first end of the oil smoke channel 3, and enters the main fan assembly 2 through the second end of the oil smoke channel 3. Finally, the gas inside the fume collecting hood 1 can be discharged to the common flue through the first air outlet 22. So, under main fan subassembly 2's negative pressure, near the gas of collection petticoat pipe 1 lateral wall can be got rid of through oil smoke passageway 3, has not only promoted user experience, and oil smoke passageway 3's simple structure moreover, the cost of manufacture is low, easily production.

In addition, as shown in fig. 7, since the first end a of the valve plate 4 is hinged with the inside of the soot passage 3, the second end b is a free end. When no oil smoke exists near the side wall of the smoke collecting cover 1 in fig. 6, the oil smoke channel 3 is closed, at the moment, the driving component 5 can drive the second end b of the valve plate 4 to be attached to one side of the oil smoke channel 3 far away from the main fan component 2, and the valve plate 4 can separate the space in the oil smoke channel 3, so that the blocking of the gas in the oil smoke channel 3 is formed. Thereby preventing the gas in the main fan assembly 2 from escaping from the auxiliary air inlet 12 connected to the smoke channel 3 shown in fig. 6. As can be seen from fig. 7, after the gas in the direction indicated by the arrow enters the oil smoke channel 3, the gas cannot go forward due to the obstruction of the valve plate 4, so that the blocking of the gas in the oil smoke channel 3 is realized.

When oil smoke exists near the side wall of the smoke collecting cover 1, as shown in fig. 8, the driving component 5 can drive the second end of the valve plate 4 to be attached to one side of the oil smoke channel 3 close to the main fan component 2, at this time, the valve plate 4 is opened relative to the oil smoke channel 3, the oil smoke at the auxiliary air inlet 12 can enter the oil smoke channel 3 through the auxiliary air inlet 12, and then the oil smoke enters the main fan component 2 in fig. 6 and is discharged to a common flue. Thus, the valve plate 4 and the driving component 5 can be matched to block the oil smoke channel 3 according to requirements, and the condition that the oil smoke runs out of the oil smoke channel 3 to influence the indoor air quality when the range hood 100 stops working is avoided.

For example, in some embodiments of the present application, as shown in fig. 9, two opposite connecting pieces 301 may be disposed on the soot passage 3, a through hole 3011 may be formed on the connecting piece 301, the first end a of the valve piece 4 has a connecting hole 41, and the connecting rod 6 penetrates through the through holes 3011 on the two connecting pieces 301 and the connecting hole 41 on the first end a of the valve piece 4, thereby forming the hinge. Finally, the two ends of the connecting rod 6 are locked, so that the second end b of the valve plate 4 can move around the connecting rod 6 at the first end a of the valve plate 4, and the second end b of the valve plate 4 can be called as a free end.

In order to more clearly explain the technical solution of the present application, the driving assembly 5 and the valve plate 4 mentioned above are specifically described below, for example, in some embodiments of the present application, as shown in fig. 9, the oil smoke channel 3 is provided with a mounting opening 302. The driving component 5 may be an electromagnet, and the electromagnet is disposed at the mounting opening 302. The range hood 100 further includes a power source (not shown), which is electrically connected to the electromagnet. Wherein, the valve plate 4 can be made of a magnetic material.

In this case, since the first end a of the valve plate 4 is hinged with the inside of the soot passage 3, the second end b is a free end. When the electromagnet is powered on, the electromagnet generates certain magnetism, a magnetic field of the electromagnet is formed around the electromagnet, and the valve plate 4 is made of a magnetic material, such as an iron plate, a nickel plate, a cobalt plate and some group VIII elements. The electromagnet generates a certain suction force on the valve plate 4, at this time, the first end a of the valve plate 4 is used as an axis, the electromagnet sucks the second end b of the valve plate 4 to deflect to one side, close to the main fan assembly 2, of the oil smoke channel 3, the oil smoke channel 3 is opened, oil smoke at the auxiliary air inlet 12 can enter the oil smoke channel 3 through the auxiliary air inlet 12, and then the oil smoke enters the main fan assembly 2 and is discharged to a public flue. When the electromagnet is powered off, the electromagnet loses magnetism, and the valve plate 4 is influenced by gravity, so that the valve plate 4 takes the first end a as an axis, and the second end b of the valve plate 4 freely falls down, so that the oil smoke channel 3 is closed. The oil smoke is prevented from escaping from the oil smoke channel 3 when the range hood 100 stops working, thereby influencing the indoor air quality.

It should be noted that, when the valve plate 4 is made of a magnetic material and the driving assembly 5 is an electromagnet, the valve plate 4 falls under the influence of gravity when the electromagnet is powered off, so that the oil smoke channel 3 is separated and blocked. Therefore, in order to ensure the blocking effect of the valve plate 4 on the oil smoke channel 3 after falling. The structure at one side of the corresponding oil smoke channel 3 far away from the main fan component 2 after the second end b of the valve plate 4 freely falls down needs to be abutted together, so that the oil smoke channel 3 is blocked.

It should be noted that, as shown in fig. 9, since the cross section of the oil smoke channel 3 is rectangular, the valve sheet 4 in the present application may be a rectangular structure. The position that sets up valve block 4 at oil smoke passageway 3, the opening of the cross section of oil smoke passageway 3 can agree with the outside of valve block 4, so, can block up in oil smoke passageway 3 when valve block 4 falls off, and form better sealed effect. In other embodiments of this application, if the position cross section that oil smoke passageway set up valve block 4 is circular, this valve block 4 also can be for the circular structure rather than agreeing with, and this application does not do the restriction to the structure of valve block 4, can satisfy and seal oil smoke passageway 3 can.

The above-mentioned structure of the smoke collecting hood 1 is exemplified below, for example, in some embodiments of the present application, as shown in fig. 10, the smoke collecting hood 1 may include an inner hood 101 and an outer hood 102, the inner hood 101 being located at the bottom of the smoke collecting hood 1. Inner cover 101 extends along the circumference of collection petticoat pipe 1, and the middle part of inner cover 101 upwards caves in and forms a collection cigarette chamber, and the middle part of inner cover 101 is equipped with the main air intake 11 with the first air intake 21 intercommunication of main fan subassembly 2, and the oil smoke in the collection cigarette chamber passes through main air intake 11 and gets into in the main fan subassembly 2, and then discharges. The outer cover 102 covers the inner cover 101, and the outer cover 102 and the inner cover 101 are matched to form a cavity inside, wherein the auxiliary air inlet 12 is arranged on at least one of the inner cover 101 and the outer cover 102, the main air inlet 11 of the smoke collecting hood 1 is arranged on the inner cover 101, and the main air outlet 11 of the smoke collecting hood 1 is arranged on the outer cover 102.

Therefore, the inner cover 101 and the outer cover 102 are simple in structure, the difficulty of production and installation processes is low, the production cost of the range hood 100 can be reduced, and the space between the inner cover 101 and the outer cover 102 can facilitate installation of the oil smoke channel 3.

In addition, as shown in fig. 10, the side of the smoke collecting hood 1 may be trapezoidal (as shown in the right side of fig. 10), the front and rear sides of the smoke collecting hood 1 may be rectangular, and the auxiliary air inlets 12 are opened at the left and right sides of the smoke collecting hood 1. The shape of the auxiliary air inlet 12 may be rectangular, and two opposite sides of the auxiliary air inlet 12 are parallel to the top surface of the smoke collecting hood. In this case, the oil smoke below the auxiliary air intake 12 can enter the auxiliary air intake 12 along the surface of the smoke collecting hood 1.

The above-mentioned structure of the soot passage 3 is exemplified below, for example, in some embodiments of the present application, as shown in fig. 11, the soot passage 3 may include a first passage 31 and a second passage 32. Wherein, the first end of the first channel 31 is communicated with the first air inlet 21 in fig. 6, and the first channel 31 is disposed near the main blower assembly 2. The first end of the second channel 32 is communicated with the second end of the first channel 31, the second end of the second channel 32 is communicated with the auxiliary air inlet 12 in fig. 6, and the second channel 32 is disposed away from the main fan assembly 2.

In this case, since the smoke collecting cover 1 is formed below the inner cover 101, a smoke collecting chamber is formed to protrude to a side close to the main fan assembly 2 to form a proper chamber for collecting the gas. The oil smoke channel 3 can be arranged at one side of the smoke collecting cavity close to the main fan component 2 and is positioned between the inner cover 101 and the outer cover 102 of the smoke collecting cover 1. The smoke passage 3 may include a first passage 31 and a second passage 32, and as such, the first passage 31 and the second passage 32 may be provided along the outer surface shape of the inner hood 101 as shown in fig. 6 to maximize the use of the space between the inner hood 101 and the outer hood 102 of the smoke collecting hood 1. After the oil smoke passage 3 is fixed, the outer cover 102 of the smoke collecting cover 1 can be installed above the oil smoke passage 3, so that the outer cover 102 covers the exposed parts of the oil smoke passage 3 and the inner cover 101, and the attractiveness is ensured, and dust, particulate matters and the like are reduced to enter the smoke collecting cover 1.

In this case, when the lampblack channel 3 is installed, the first channel 31 can be installed first, then the second channel 32 can be installed, or the second channel 32 can be installed first, then the first channel 31 can be installed, and the first channel 31 and the second channel 32 can be connected in a clamping manner, and the installation sequence is partially front and back. Finally, fine adjustments can be made through the snap-fit between first channel 31 and second channel 32. Thus, the problem that the oil smoke channel 3 cannot be installed due to factors such as errors is avoided.

In addition, in the transportation process, the first channel 31 and the second channel 32 can be separated, so that the placement and transportation are convenient. When the product is to be transported to an installation site, the product can be assembled on site. Because the oil smoke passageway 3 can split into two part structures, when carrying out parts machining, can separately process part first passageway 31 and second passageway 32, reduced the processing degree of difficulty of part, save the processing cost. In other embodiments of the present application, the soot passage 3 may be disassembled into a plurality of parts, and assembled after being processed or assembled on site. This application does not do the restriction to the split quantity of oil smoke passageway 3, and oil smoke passageway 3 can satisfy gas and flow in oil smoke passageway 3 can.

In addition, the material of oil smoke passageway 3 can select for iron sheet or stainless steel, not only mechanical strength is high, long service life moreover. In other embodiments of the present application, the oil smoke channel 3 may also be made of an aluminum foil material, at this time, the oil smoke channel 3 may be placed along the structure between the inner cover 101 and the outer cover 102 inside the smoke collecting cover 1, the degree of freedom is high, but the oil smoke channel 3 made of the aluminum foil material needs to be communicated with the side wall of the smoke collecting cover 1 and the main fan assembly 2 through other fixing members.

In order to solve the problem of sealing between the first channel 31 and the second channel 32 shown in fig. 11, an adhesive layer may be provided at the junction of the first channel 31 and the second channel 32. In this way, the gap at the junction can be sealed, thereby enhancing the fluency of the gas within the first channel 31. The adhesive layer can be adhesive bonding, and the adhesive bonding has the characteristics of continuous stress distribution, light weight, sealing, low temperature of most processes and the like. The glue joint is suitable for connecting different materials, different thicknesses, ultrathin specifications and complex components. The adhesives are classified into thermosetting type, hot-melt type, room temperature curing type, pressure-sensitive type, etc. according to the application method. According to the application object, the glue is divided into structural type, non-structural type or special glue. The grafting forms can be classified into water-soluble forms, water-emulsion forms, solvent forms, and various solid forms. The adhesive layer according to the embodiment of the present application may be selected according to the specific structure and material of the first channel 31 and the second channel 32.

In addition, in other embodiments of the present application, the first channel 31 and the second channel 32 may be of an integral structure, so that there is no connecting gap on the whole lampblack channel 3, in which case lampblack does not escape from the gap. The angle between the first channel 31 and the second channel 32 may not be limited, and the two channels may be of an integral structure, and the two channels are maintained in the same plane without angle limitation, so that the machining process is relatively easier.

In order to facilitate the installation and fixing of the cooking fume duct 3, as shown in fig. 12, the range hood 100 may further include a first folded edge 311 and a second folded edge 321. The range hood 100 further comprises a box body 7, the box body 7 is provided with a box body 7 accommodating cavity, and a box body air inlet 71 and a box body air outlet 72 are formed in the box body 7 accommodating cavity. The main fan assembly 2 is located in the accommodating cavity of the box 7, the first air outlet 22 of the main fan assembly 2 faces one side of the box air outlet 72, and the box air inlet 71 is communicated with the first air inlet 21 of the main fan assembly 2. In this case, the first end of the first passage 31 communicates with the housing 7 accommodating chamber of the housing 7. Wherein the first folded edge 311 is disposed around the edge of the first end of the first channel 31 and connected to the box 7, so that the first channel 31 is communicated with the accommodating cavity of the box 7. The second flange 321 is provided around the second end edge of the second passage 32 and is connected to the smoke collecting hood 1. Thereby communicating the second passage 32 with the secondary intake vent 12 of fig. 6.

In this case, the first flange 311 may be integrally formed with the first passage 31, and the second flange 321 may be integrally formed with the second passage 32. In this way, the first folded edge 311 may be parallel to the surface of the box 7, the contact area between the first end of the first channel 31 and the box 7 may be increased, and the first folded edge 311 and the surface of the box 7 may be connected by a fastener such as an adhesive or a screw, so as to enhance the firmness between the first channel 31 and the surface of the box 7. The second folding edge 321 may be parallel to the surface of the connection part with the smoke collecting hood 1, the contact area of the second end of the second channel 32 with the smoke collecting hood 1 is increased, and the second folding edge 321 and the smoke collecting hood 1 surface may also be connected by a fastener such as glue or screw. Thereby enhancing the coupling strength between the second channel 32 and the smoke collecting hood 1.

In addition, in order to facilitate the processing of the soot channel 3, the first flange 311 and the second flange 321 may be prefabricated separately from the soot channel 3. And the first flap 311 may have a portion that is attached to the wall surface of the first passage 31, and then the first flap 311 may have a position to be connected to the wall surface of the first passage 31 by using a screw or an adhesive. The second flap 321 may have a portion that engages the wall of the second channel 32 and then the location where the second flap 321 is connected to the second channel 32 is attached by screws or glue. Therefore, when parts are manufactured, the first folding edge 311 and the oil smoke channel 3 can be processed respectively, the processing difficulty is reduced, and the production cost is reduced.

It should be noted that, the screw stationary phase has a higher flexibility ratio with respect to the glue adhesion, when the range hood 100 needs to be maintained, the parts in the range hood 100 need to be disassembled for maintenance, the screw fixing position can be conveniently disassembled and assembled, and the connection position is more stable due to the limitation of the screw. Therefore, the connection mode before the parts is not limited by the application, and can be freely selected according to the requirements of users.

In addition, because the range hood 100 has various types and the surface areas of the side walls of the range hood 100 are different, the sizes of the auxiliary air inlets 12 formed in the surface of the side wall of the range hood 100 may be different. In this case, the size of the auxiliary air inlet 12 can be adjusted by adjusting the size of the second folded edge 321 without changing the structures of the first channel 31 and the second channel 32, so as to achieve the effect of matching installation. Otherwise, if the second flange 321 is connected to the second channel 32 as an integral structure. In this case, if the size of the auxiliary air inlet 12 is not equal to the size of the connection port of the soot passage 3, the size of the auxiliary air inlet 12 is larger than the size of the connection port of the soot passage 3. The opening of the auxiliary air inlet 12 is too large, which will result in that the lampblack channel 3 cannot be connected with the auxiliary air inlet 12. If the size of the auxiliary air inlet 12 is smaller than the size of the connection port of the oil smoke channel 3, the connection port of the oil smoke channel 3 is too large. Although the oil smoke channel 3 can still be connected to the auxiliary air inlet 12, the smooth transition between the auxiliary air inlet 12 and the oil smoke channel 3 cannot be formed after the connection, and therefore, the gas flow rate is affected. In addition, the production cost is additionally increased due to the overlarge connecting port of the oil smoke channel 3.

For example, in some embodiments of the present application, as shown in fig. 13, the above-mentioned box 7 may include a first panel 701, a second panel 702, a third panel 703 and a fourth panel 704 connected end to end in sequence, where the fourth panel 704 is connected with the first panel 701 again to form a closed loop, so as to form a rectangular cavity, one opening of the rectangular cavity is communicated with the main air outlet 11 on the outer cover 102 of the smoke collecting hood 1 in fig. 10 and is a box air inlet 71, the other opening of the rectangular cavity is provided with a fifth panel 705, and the fifth panel 705 is provided with an outlet which is a box air outlet 72. In this case, when the main blower assembly 2 operates in the accommodating cavity of the box 7, negative pressure can be generated in the box 7, so that gas is discharged from the box air inlet 71 to the box air outlet 72 and finally to the common flue.

For more clearly explaining the technical solution of the present application, the number of the auxiliary air inlets 12 in the present application is illustrated by two examples, as shown in fig. 14, which are a first auxiliary air inlet 12a (left structure not shown in fig. 14) and a second auxiliary air inlet 12b (right structure in fig. 14), respectively. The first auxiliary air inlet 12a and the second auxiliary air inlet 12b are respectively opened on two opposite side walls of the smoke collecting cover 1. The two oil smoke channels 3 corresponding to the auxiliary air inlet 12 are respectively a first oil smoke channel 3a and a second oil smoke channel 3 b. The first end of the first oil smoke channel 3a is communicated with the first air inlet 21, and the second end of the first oil smoke channel 3a is communicated with the first auxiliary air inlet 12 a. A first end of the second oil smoke passage 3b is communicated with the first air inlet 21, and a second end of the second oil smoke passage 3b is communicated with the second auxiliary air inlet 12 b.

In this case, since the range hood 100 is in operation, two sides of the smoke collecting cover 1 belong to an area where smoke is easily overflowed, the first auxiliary air inlet 12a and the second auxiliary air inlet 12b respectively formed on two opposite side walls of the smoke collecting cover 1 can correspondingly adsorb gas in the peripheral area, especially overflowed smoke. When the main fan assembly 2 is started, negative pressure is formed in the main fan assembly 2, and since the first auxiliary air inlet 12a and the second auxiliary air inlet 12b are respectively communicated with the main fan assembly 2 through the first oil smoke channel 3a and the second oil smoke channel 3b, gas near the first auxiliary air inlet 12a and gas near the first auxiliary air inlet 12a, which are communicated with the main fan assembly 2, are sucked. Then, the air at the first auxiliary air inlet 12a enters the first oil smoke passage 3a, and then enters the main fan assembly 2 from the vicinity of the first air inlet 21 to be discharged. Similarly, the air at the second auxiliary air inlet 12b enters the second oil smoke channel 3b and then enters the main fan assembly 2 from the first air inlet 21 to be discharged. Therefore, the problem that most of oil smoke overflowing nearby the smoke collecting cover 1 overflows is solved.

To further enhance the stability of the smoke channel 3 in the smoke collecting cover 1, the range hood 100 may further include a support plate 303 as shown in fig. 15, in some embodiments of the present application, two support plates 303 may be configured for each smoke channel 3, and the two support plates 303 may be symmetrically disposed on two sides of the smoke channel 3. It should be noted that the symmetry here is not exactly the same as the mounting manner of the support plates 303 on both sides of the cooking fume duct 3, and can be adjusted according to the position. The first end of the support plate 303 is connected to the second channel 32. The second end of the support plate 303 is connected to the fume collecting hood 1.

In this way, the supporting plate 303 can fix the structure of the larger side of the cooking fume passage 3 to the fume collecting cover 1, in which case the supporting plate 303 can support the cooking fume passage 3. In the absence of the support plate 303, since the distance between the auxiliary air inlet 12 and the box air inlet 71 is relatively long, when the main fan assembly 2 in the box 7 operates, a strong negative pressure may cause the lampblack passage 3 to vibrate to some extent, and may affect the mechanical strength of the connection between the lampblack passage 3 and the box 7 and the smoke collecting hood 1. After the two sides of the oil smoke channel 3 are fixed with the inner cover 101 or the outer cover 102 of the smoke collecting cover 1 by the support plates 303, the supporting points of the oil smoke channel 3 are more, which is helpful for the overall stability of the oil smoke channel 3.

In addition, this application embodiment does not limit the quantity of the backup pad 303 of oil smoke passageway 3 both sides, and in other embodiments of this application, the quantity of the backup pad 303 of oil smoke passageway 3 both sides can be a plurality of, and specific quantity can be set for according to the size of collection petticoat pipe 1. In order not to reduce the tightness of the oil smoke channel 3 and not to influence the fluency of the gas in the oil smoke channel 3, the support plate 303 can be bonded with the surface of the oil smoke channel 3 by glue, and the proper position is selected according to the internal structure of the smoke collecting cover 1 to connect the smoke collecting cover 1 and the oil smoke channel 3 together through the support plate 303. In this way, the support plate 303 forms an additional support for the smoke channel 3, and the influence of vibration on the smoke channel 3 can be reduced.

In addition, in some embodiments of the present application, the support plate 303 may be in a plate structure, one end of the support plate 303 may be connected to the upper and lower surfaces of the smoke passage 3, and the other end of the support plate 303 extends from the side surface of the smoke passage 3 and is connected to the smoke collecting cover 1. In other embodiments of the present application, one end of the support plate 303 may be connected to a side of the cooking fume path 3, and the other end of the support plate 303 is connected to the fume collecting hood 1. The shape of this application to backup pad 303 does not do the restriction, can satisfy the connection form on collection petticoat pipe 1 to the oil smoke passageway 3 fixed can.

In addition, as shown in fig. 16, an oil screen 14 may be provided at the main air inlet 11 at the smoke collection chamber of the smoke collection cover 1. Thereby effectively reducing the pollution of the household oil smoke to the air. The oil screen 14 is generally made of metal, and after the oil smoke is separated by the oil screen 14, part of the oil smoke adheres to the oil screen 14, and can be cleaned by detaching the oil screen 14. The oil screen 14 may also be obtained by mixing, opening, lapping, and shaping fiber webs to form an integral structure, and may be replaced after a period of use.

In addition, the surface of the oil screen 14 is generally flat, and although the structure can make the oil on the oil screen 14 slide downwards slowly, the filtering area is limited, and the effect is not ideal. Therefore, in other embodiments of the present application, the surface of the oil screen 14 may be provided with a wave shape, so as to increase the filtering area of the oil screen 14 and improve the oil filtering effect of the oil screen 14. In other embodiments of the present application, the surface structure of the filter screen 14 is not limited, and the oil smoke on the lower surface of the smoke collection cover 1 can be filtered to a certain extent.

The above-mentioned structure of the secondary intake vent 12 is exemplified below, and in some embodiments of the present application, the secondary intake vent 12 may include at least one oval vent or polygonal vent. The plurality of oval openings or the plurality of polygonal openings can form the shape of a grid, and the grid is used for blocking the gas on the side wall of the fume collecting hood 1, so that light articles such as plastics and the like are prevented from entering the range hood 100 due to the suction force of the range hood 100, and the normal operation of the range hood 100 is further influenced. The arrangement of the grid can not only ensure the smoothness of the oil smoke channel 3, but also be beneficial to preventing oil smoke from flowing back to cause air pollution in a kitchen. In addition, the grid can form a detachable structure with the side wall of the fume collecting hood 1, so that the grid can be detached and replaced individually, and the grid is convenient to carry and maintain. In addition, the modular combination is beneficial to improving the productivity of the flow process.

From this, the grid can be like the filter screen large debris in the filtered air, prevent that debris from entering into in the fan subassembly and damaging the fan subassembly after getting into oil smoke passageway 3, and then promoted range hood 100's life, and for the main air intake 11 heavy-calibre of collection petticoat pipe 1, be favorable to promoting the aesthetic measure of range hood 100 surface, moreover, if oil smoke passageway 3 breaks down, provide the space for repairing oil smoke passageway 3 through demolising the grid, can promote range hood 100's maintenance efficiency.

In other embodiments of the present application, when the grid is made of metal, the grid can be adhered to the inner wall of the side wall of the smoke collecting cover 1 by glue, so that the side wall of the smoke collecting cover 1 does not need to be provided with a connecting hole for connecting the grid, which is helpful for the sealing performance of the whole smoke collecting cover 1. And because the grizzly screen adopts the metal material, not fragile, the oil smoke of collection petticoat pipe 1 lateral wall department is less, consequently, can the grizzly screen select not to change under the condition of long-time use. But the surface of the grid can be cleaned at regular time, so that the surface cleanliness of the grid is ensured.

The above-mentioned structure of the main fan assembly 2 is exemplified below, for example, in some embodiments of the present application, the main fan assembly 2 may include a main volute 23, an impeller 24, and a motor 25 as shown in fig. 17. The main volute 23 has a fourth air inlet 231 and a fourth air outlet 232, the main volute 23 is disposed in the casing 7, the fourth air inlet 231 of the main volute 23 is communicated with the casing air inlet 71, and the fourth air outlet 232 is communicated with the casing air outlet 72. The impeller 24 is disposed within the main volute 23. An electric motor 25 is disposed within the main volute 23, and the electric motor 25 is used for driving the impeller 24 to rotate relative to the main volute 23.

In this case, when the user starts the range hood 100, the motor 25 operates along with the motor, the motor 25 drives the impeller 24 to rotate, and at this time, because the impeller 24 is disposed in the main volute 23, and the main volute 23 is of a shell structure, in this way, the impeller 24 can form negative pressure in the main volute 23 during a high-speed operation process. Therefore, the fume collecting hood 1 starts to collect the fume, the fume enters the main volute 23 in the box 7 from the fourth air inlet 231 through the fume collecting cavity at the bottom of the fume collecting hood 1, and finally is discharged from the common flue through the box air outlet 72 from the fourth air outlet 232.

In some embodiments of the present application, the range hood 100 may further include an auxiliary fan assembly 33, as shown in fig. 18, the auxiliary fan assembly 33 is disposed in the second channel 32 and is located on a side of the valve plate 4 close to the auxiliary air inlet 12. The structure of the above-mentioned auxiliary blower assembly 33 is exemplified below, for example, in some embodiments of the present application, the auxiliary blower assembly 33 includes an auxiliary volute 331 and an auxiliary blower 332, wherein the auxiliary volute 331 is disposed in the second channel 32, and the auxiliary volute 331 has two opposite second air inlets 3311 and one second air outlet 3312. The second outlet 3312 faces a first end of the second channel 32; at least one second air inlet 3311 has a gap with the inner wall of the second passage 32. The auxiliary fan 332 is disposed in the auxiliary volute 331, and the auxiliary fan 332 has a third air inlet and a third air outlet (not shown). The third air inlet is communicated with the second air inlet 3311 of the auxiliary volute 331, and the third air outlet is communicated with the second air outlet 3312 of the auxiliary volute 331.

In addition, the second air inlet 3311 of the auxiliary volute 331 may have a circular shape matching the third air inlet shape of the auxiliary blower 332, and the auxiliary blower 332 may be installed at a position corresponding to the second air inlet 3311, so that when the auxiliary blower 332 operates, a suction force may be directly formed at the second air inlet 3311 of the auxiliary volute 331, which is helpful for the auxiliary blower 332 assembly 33 to form a negative pressure effect in the second channel 32.

In this case, as shown in fig. 18, when the auxiliary blower 332 is started, negative pressure is generated in the auxiliary volute 331, so that negative pressure is generated at the second air inlet 3311, since a gap S exists between the second air inlet 3311 and the second channel 32, the second channel 32 communicates with the second air inlet 3311, negative pressure is formed in the second channel 32, and since the second channel 32 communicates with the auxiliary air inlet 12, suction is generated in an area near the auxiliary air inlet 12, so that oil smoke near the auxiliary air inlet 12 is sucked away.

Therefore, the range hood 100 in the embodiment of the present application may further include a controller 8 and a smoke sensor 9 as shown in fig. 19, where the controller 8 may be a PLC controller 8, and the controller 8 is electrically connected to the driving assembly 5, the auxiliary fan assembly 33, and the main fan assembly 2. The smoke sensor 9 is electrically connected with the controller 8, the smoke sensor 9 is arranged at the auxiliary air inlet 12 and used for detecting oil smoke and sending a detection result to the controller 8, and the controller 8 compares the detection result with a preset threshold value.

If the detection result is greater than the preset threshold, the controller 8 sends a first control instruction to the driving assembly 5. The first control instruction is used for instructing the second end b of the driving valve plate 4 of the driving assembly 5 to attach to one side of the lampblack channel 3 close to the main fan assembly 2 (as shown in fig. 18). If the detection result is less than or equal to the preset threshold, the controller 8 sends a second control instruction to the driving assembly 5. The second control instruction is used for instructing the driving assembly 5 to drive the second end of the valve plate 4 to attach to the side, away from the main fan assembly 2, of the lampblack channel 3 (as shown in fig. 20).

In addition, the controller 8 may control the operation of the main fan assembly 2 alone, and may also control any one of the auxiliary fan assemblies 33 to operate alone, which is not limited in this application.

In addition, the fume collecting hood 1 can be provided with a lighting lamp (not shown in the figure), such as a light-emitting diode lamp bead, a light-emitting diode lamp strip, a light homogenizing hood and the like. Thus, when the range hood 100 is installed above the cooking range, the powered lighting lamp can illuminate the cooking bench, so that the cooking operation of a user is facilitated.

In this case, a control panel (not shown) may be provided on the front side of the smoke collection cover 1, and the control panel may be a touch control panel that gives an instruction by a touch operation, or a mechanical control button may be provided on the control panel that gives an instruction to the controller 8 by an operation such as a rotation button or a push button. The command may include a main fan assembly 2 switch command, a drive assembly 5 switch command, a light switch command, etc. In addition, the touch control panel button (also can be for button or knob etc.) on the collection petticoat pipe 1 can be provided with a plurality of gear buttons, corresponds a plurality of gears of main fan subassembly 2 and auxiliary fan subassembly 33 respectively, so, the user can be according to the size of oil smoke volume corresponding button of start by oneself and satisfy the demand.

In other embodiments of the application, the auxiliary fan assembly 33 can automatically adjust the power according to the oil smoke concentration detected by the smoke sensor 9, so that the range hood 100 is more intelligent, the user does not need to additionally operate to mechanically operate the auxiliary fan assembly 33 so as to control the operation of the auxiliary fan assembly 33, and the cost of manual operation is reduced.

In addition, in other embodiments of the present application, a switch button may be disposed on the range hood 100, and a plurality of modes may be established for the range hood 100, for example, the modes may be a manual mode and an intelligent mode, respectively, and the mode is in the manual mode when not used, and is changed into the intelligent mode when the switch button is pressed, and is changed into the manual mode when the switch button is pressed again, and so on. Wherein, manual mode corresponds the gear button and controls, and intelligent mode can be according to the power of oil smoke volume automatic control main fan subassembly 2 and auxiliary fan subassembly 33. Therefore, the user can switch according to the requirement, and the mode switching mode and the type are not limited in the application.

Therefore, the main fan assembly 2 can be controlled to be started through the control panel, then the negative pressure is generated inside the fume collecting hood 1, and the fume below the fume collecting hood 1 is sucked by the fume collecting hood 1, so that the fume is discharged into a public flue through the main fan assembly 2. When the oil smoke below the smoke collecting cover 1 is too much, the oil smoke can overflow to the side surface of the smoke collecting cover 1 along with the lower part of the smoke collecting cover 1, because the side surface of the smoke collecting cover 1 is provided with the auxiliary air inlet 12, the oil smoke at the auxiliary air inlet 12 can enter the main fan component 2 along with the oil smoke channel 3, and then the oil smoke is discharged into the public flue through the main fan component 2.

This application only need set up corresponding mounting hole on box 7 and set up supplementary air intake 12 on the collection petticoat pipe 1 on original range hood 100's basis can, then install oil smoke passageway 3 additional inside collection petticoat pipe 1 to be linked together with the supplementary air intake 12 of box 7 and the side of collection petticoat pipe 1. The range hood can be installed not only when leaving a factory, but also on the basis of the existing range hood 100, and the range hood has a wide application range.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A range hood, comprising:

the main fan assembly comprises a first air inlet and a first air outlet;

the smoke collecting hood is communicated with the first air inlet; a main air inlet is formed in one side, far away from the main fan assembly, of the smoke collection cover, and at least one auxiliary air inlet is formed in the smoke collection cover;

the oil smoke channel is arranged in the smoke collecting cover, the first end of the oil smoke channel is communicated with the auxiliary air inlet, and the second end of the oil smoke channel is communicated with the first air inlet;

the valve plate is provided with a first end and a second end which are opposite, wherein the first end is hinged with the inside of the oil smoke channel, and the second end is a free end;

the driving assembly is arranged on the oil smoke channel and used for driving the second end of the valve plate to be attached to one side, far away from the main fan assembly, of the oil smoke channel; and the second end used for driving the valve plate is attached to one side, close to the main fan assembly, of the oil smoke channel.

2. The range hood according to claim 1, wherein the oil smoke channel is provided with a mounting opening;

the driving assembly is an electromagnet, and the electromagnet is arranged at the mounting opening;

the range hood also comprises a power supply which is electrically connected with the electromagnet;

the valve plate is made of a magnetic material.

3. The range hood of claim 1, further comprising an auxiliary fan assembly; the auxiliary fan assembly is arranged in the oil smoke channel and is located on one side, close to the auxiliary air inlet, of the valve block.

4. A range hood as claimed in claim 3, wherein the cooking fume path comprises:

the first end of the first channel is communicated with the first air inlet, and the first channel is arranged close to the main fan assembly;

a first end of the second channel is communicated with a second end of the first channel, a second end of the second channel is communicated with the auxiliary air inlet, and the second channel is far away from the main fan assembly;

wherein the auxiliary fan assembly is disposed in the second channel.

5. The range hood of claim 4, wherein the auxiliary fan assembly comprises:

the auxiliary volute is arranged in the second channel and is provided with two second air inlets and one second air outlet which are opposite; the second air outlet faces the first end of the second channel; at least one second air inlet is provided with a gap with the inner wall of the second channel;

the auxiliary fan is arranged in the auxiliary volute and is provided with a third air inlet and a third air outlet; the third air inlet is communicated with the second air inlet of the auxiliary volute, and the third air outlet is communicated with the second air outlet of the auxiliary volute.

6. The range hood of claim 4, further comprising a housing;

the box body is provided with a box body accommodating cavity, and the box body accommodating cavity is provided with a box body air inlet and a box body air outlet; the main fan assembly is positioned in the box body accommodating cavity, the first air outlet of the main fan assembly faces one side of the box body air outlet, and the box body air inlet is communicated with the first air inlet of the main fan assembly;

the first end of the first channel is communicated with the box body accommodating cavity of the box body;

the range hood further comprises:

the first folding edge is arranged around the edge of the first end of the first channel and is connected with the box body;

and the second folded edge is arranged around the second end edge of the second channel and is connected with the smoke collecting cover.

7. The range hood of claim 1, wherein the at least one auxiliary intake vent comprises a first auxiliary intake vent and a second auxiliary intake vent; the first auxiliary air inlet and the second auxiliary air inlet are respectively formed in two opposite side walls of the smoke collecting cover;

the at least one oil smoke channel comprises a first oil smoke channel and a second oil smoke channel;

the first end of the first oil smoke channel is communicated with the first air inlet, and the second end of the first oil smoke channel is communicated with the first auxiliary air inlet;

the first end of the second oil smoke channel is communicated with the first air inlet, and the second end of the second oil smoke channel is communicated with the second auxiliary air inlet.

8. The range hood of claim 4, further comprising a support plate, wherein the first end of the support plate is connected to the second channel; the second end of the supporting plate is connected with the smoke collecting cover.

9. The range hood of claim 6 wherein the main fan assembly comprises:

the main volute is provided with a fourth air inlet and a fourth air outlet, the main volute is arranged in the box body, the fourth air inlet of the main volute is communicated with the box body air inlet, and the fourth air outlet is communicated with the box body air outlet;

an impeller disposed within the main volute;

and the motor is arranged in the main volute and is used for driving the impeller to rotate relative to the main volute.

10. The range hood according to any one of claims 1 to 9, further comprising:

a controller; is electrically connected with the driving component;

the smoke sensor is electrically connected with the controller, arranged at the auxiliary air inlet and used for detecting oil smoke and sending a detection result to the controller, and the controller compares the detection result with a preset threshold value;

if the detection result is larger than the preset threshold value, the controller sends a first control instruction to the driving assembly; the first control instruction is used for indicating the driving assembly to drive the second end of the valve plate to be attached to one side, close to the main fan assembly, of the oil smoke channel;

if the detection result is smaller than or equal to the preset threshold value, the controller sends a second control instruction to the driving assembly; and the second control instruction is used for indicating the driving component to drive the second end of the valve plate to be attached to one side, away from the main fan component, of the oil smoke channel.

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