WO2018157664A1

WO2018157664A1 - Fume cyclonic-collection device, range hood, and kitchen fume-extracting and cooking equipment

Info

Publication number: WO2018157664A1
Application number: PCT/CN2018/071815
Authority: WO
Inventors: Fue-sang LIEN; Chenguang Li; Hua Ji
Original assignee: Lien Fue Sang
Priority date: 2017-02-28
Filing date: 2018-01-08
Publication date: 2018-09-07

Abstract

A fume cyclonic-collection device (200) includes an air guiding piece which defines an air channel (21a) therein. The air guiding piece is provided with an air inlet (21b) and an air outlet (21c) communicated with the air channel (21a). The air guiding piece is configured to generate a tornado-shaped cyclone for cyclonically collecting fumes through an airflow sprayed out of the air outlet (21c).

Description

FUME CYCLONIC-COLLECTION DEVICE, RANGE HOOD, AND KITCHEN FUME-EXTRACTING AND COOKING EQUIPMENT

FIELD

The present disclosure relates to a technical field of kitchen electrical appliances. More specifically, it relates to a fume cyclonic-collection device, a range hood, and a kitchen fume-extracting and cooking equipment.

BACKGROUND

In the related art, a range hood generates negative pressure at a fume suction port thereof by means of a rotating impeller, so that airflow nearby the fume suction port may be sucked into the fume suction port. This suction power decreases rapidly as the distance from the fume suction port increases. When the range hood is mounted to a standard height, it has extremely weak suction power nearby a surface of a range. Thus there is insufficient power for driving the fume to move towards the fume suction port. Moreover, the suction power produced by the range hood has dispersive directions, so the range hood draws air from other directions not only the fume below; this causes a small fume extracting volume flow rate. If the fume cannot be drawn away in time, the fume spreads all around under an action of gravity, thus influencing a fume suction effect. Therefore, the range hood in the related art has a limited extent of suction effect (which cannot be increased) , a low fume suction efficiency, a high energy consumption, and a loud noise.

SUMMARY

The present disclosure aims to solve at least one of the technical problems mentioned above, at least to some extent.

Embodiments of the first aspect of the present disclosure provide a novel fume cyclonic-collection device for a range hood. The fume cyclonic-collection device has a large extent of suction effect and a high fume suction efficiency.

Embodiments of the second aspect of the present disclosure provide a novel design of range hood.

Embodiments of the third aspect of the present disclosure provide a novel design of kitchen fume-extracting and cooking equipment having the above range hood.

The fume cyclonic-collection device according to embodiments of the present disclosure includes an air guiding piece. The air guiding piece defines an air channel therein, and has an air inlet and an air outlet communicated with the air channel. The air guiding piece is configured to generate a tornado-shaped cyclone (s) for cyclonically collecting fumes through an airflow sprayed out of the air outlet.

In the fume cyclonic-collection device according to embodiments of the present disclosure, air enters the air channel through the air inlet. The air is then exhausted out of the air outlet and applies a powerful shear force on surrounding air and fumes, so as to drive the surrounding air and fumes to flow. This results in a tornado-shaped cyclone (s) . The fumes rise spirally under an action of the cyclone and are prevented from spreading all around. What occurs is that the extent of the suction power of the range hood is enlarged, the power requirement for the range hood is reduced, the energy consumption is decreased, and the operational noise of the range hood is further reduced thereby improving the quality and performance of the range hood.

The fume cyclonic-collection device according to further embodiments of the present disclosure further includes a fan. The fan is connected with the air guiding piece and configured to provide air into the air channel to form the airflow.

The fume cyclonic-collection device according to further embodiments of the present disclosure further includes a smart controller. The controller is connected with the fan and configured to control the rotating speed of the fan.

In some embodiments, the range hood includes a hood body while the air guiding piece extends substantially along a vertical direction between a lower edge of the hood body and a range. The air guiding piece is mounted to the hood body, has an upper end connected with the lower edge of the hood body at the rear side thereof, and has a lower end spaced apart from the upper surface of the range. Or, the air guiding piece is mounted to the range.

In some embodiments, the fan is disposed outside of the air guiding piece and communicated with the air channel through an air guiding pipe. Or, the fan is disposed inside the air channel and adjacent to an end of the air guiding piece, and the air inlet is adjacent to the fan.

In some embodiments, the air guiding piece is configured as an air guiding plate extending along the vertical direction. A plurality of columns of air outlets is provided. The air guiding piece includes a one-piece plate, a plurality of plates spaced apart one another along the left and right directions, or at least one air pipe extending substantially along the vertical direction.

In some embodiments, the air outlet includes at least one slit and/or a plurality of holes.

The range hood according to embodiments of the second aspect of the present disclosure includes: a hood body being provided with a fume suction port and a fume exhaust port, and a fume cyclonic-collection device defining an air channel therein. The air channel is provided with an air inlet and an air outlet. The fume cyclonic-collection device is configured to generate a tornado-shaped cyclone (s) through an airflow sprayed out of the air outlet; the tornado-shaped cyclone (s) is configured for cyclonically collecting fumes so as to guide the fumes to the fume suction port.

According to embodiments of the present disclosure, by providing the fume cyclonic-collection device in a range hood, a tornado-shaped cyclone (s) is formed between the range and the hood body, and the tornado-shaped cyclone produces a powerful gathering force. The vertical extent of this force is from the range to the hood body, such that the fumes are prevented from escaping outwards and move towards the fume suction port under an action of the cyclone. This improves the fume extracting efficiency, and reduces energy consumption and noises from the range hood.

In some embodiments, the fume cyclonic-collection device is mounted to the rear edge of the hood body and extends downwards from the hood body to be close to the range. Or, the fume cyclonic-collection device is mounted to the range and extends upwards to be close to the hood body.

In some embodiments, the fume cyclonic-collection device includes at least one air pipe. The air channel is defined by an inner cavity of at least one air pipe, and at least one air pipe is connected with the hood body or mounted to the range.

In some embodiments, the projection of the hood body on a horizontal plane is substantially rectangular. In the case that two air pipes are provided, the two air pipes are disposed to the lower edge of the hood body at the rear side thereof, and spaced apart from each other along the left and right directions. One of the two air pipes is located at the left side of the leftmost burner on the range, and the other one of the two air pipes is located at the right side of the rightmost burner on the range. Or, in the case of three air pipes are provided, the three air pipes are disposed to the lower edge of the hood body at the rear side thereof, and spaced apart from one another along the left and right directions. The left air pipe of the three air pipes is located at the left side of the leftmost burner on the range, the right air pipe is located at the right side of the rightmost burner on the range, and the middle air pipe is located between two adjacent burners on the range. The air outlets of the left air pipe and the right air pipe are opened forwards, and the opening direction of the air outlet (s) of the middle air pipe has an angle between -90 degrees and 90 degrees relative to the forward direction.

In some embodiments, the air pipe is mounted to the hood body, which is detachable and/or rotatable around the axis of the air pipe.

In some embodiments, the air pipe is configured as a straight pipe extending substantially along the vertical direction. A length of the air pipe is adjustable along the axial direction of the air pipe.

In some embodiments, the fume cyclonic-collection device includes an air guiding plate. The air guiding plate defines the air channel therein; it has the air inlet and the air outlet communicating with the air channel. The air guiding plate is configured to generate the cyclone (s) through the airflow sprayed out of the air outlet.

In some embodiments, the projection of the hood body on a horizontal plane is substantially rectangular. The air guiding plate is disposed to the lower edge of the hood body at the rear side thereof, and extends along the left and right directions. The air guiding plate is provided with two groups of air outlets spaced apart from each other along the left and right directions. In the two groups of air outlets, one group of air outlets are located at the left side of the leftmost burner on the range, and the other group of air outlets is located at the right side of the rightmost burner on the range. Or, the air guiding plate is provided with three groups of air outlets spaced apart from one another along the left and right directions. In the three groups of air outlets, the first group of air outlets are located at the left side of the leftmost burner on the range, the second group of air outlets is located at the right side of the rightmost burner on the range, and the third group of air outlets is located between two adjacent burners on the range. The air outlets of the first group and the second group are opened forwards, and the opening directions of the air outlets of the third group each has an angle between -90 degrees and 90 degrees relative to the forward direction in which the air outlets of the first group and the second group are opened.

According to further embodiments of the present disclosure, the fume cyclonic-collection device further includes a fan, and the fan is connected with the air guiding plate and configured to form the airflow in the air channel.

The kitchen fume-extracting and cooking equipment according to further embodiments of the third aspect of the present disclosure includes: a range provided with a burner, and a range hood according to the above embodiments. The hood body of the range hood is disposed above the range, and the fume cyclonic-collection device of the range hood is disposed between the hood body and the range.

The kitchen fume-extracting and cooking equipment according to embodiments of the present disclosure has high fume extracting efficiency, low energy consumption, and good performance.

In some embodiments, a plurality of columns of air outlets is provided. In the plurality of columns of air outlets, the air outlets of the leftmost column and the rightmost column are opened forwards, and the opening directions of the air outlets of the rest columns each has an angle between -90 degrees and 90 degrees relative to the forward direction in which the air outlets of the leftmost column and the rightmost column are opened.

In some embodiments, the fume cyclonic-collection device is configured in one of following manners: (1) the fume cyclonic-collection device is mounted to the hood body and extends downwards from the hood body to be close to the range; (2) the fume cyclonic-collection device is mounted to the range and extends upwards to be close to the hood body; and (3) the fume cyclonic-collection device is disposed on a wall behind the range and the hood body.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic view of a kitchen fume-extracting and cooking equipment according to an embodiment of the present disclosure.

Fig. 2 is a schematic view of a cyclone produced by the kitchen fume-extracting and cooking equipment shown in Fig. 1.

Fig. 3 is a schematic view of a kitchen fume-extracting and cooking equipment according to another embodiment of the present disclosure.

Fig. 4 is a schematic view of a cyclone produced by the kitchen fume-extracting and cooking equipment shown in Fig. 3.

Fig. 5 is a schematic view of a kitchen fume-extracting and cooking equipment according to another embodiment of the present disclosure.

Fig. 6 is a schematic view of a cyclone produced by the kitchen fume-extracting and cooking equipment shown in Fig. 5.

Fig. 7 is a schematic view of an air pipe of a fume cyclonic-collection device according to an embodiment of the present disclosure.

Fig. 8 is an exploded view of the structure shown in Fig. 7.

Fig. 9 is a schematic view of an air pipe of a fume cyclonic-collection device according to another embodiment of the present disclosure.

Fig. 10 is a sectional view of the structure shown in Fig. 9.

Fig. 11 is an exploded view of the structure shown in Fig. 9.

Fig. 12 is a schematic view of a kitchen fume-extracting and cooking equipment according to an embodiment of the present disclosure.

Fig. 13 is a schematic view of a cyclone produced by the kitchen fume-extracting and cooking equipment shown in Fig. 12.

Fig. 14 is a schematic view of a kitchen fume-extracting and cooking equipment according to another embodiment of the present disclosure.

Fig. 15 is a schematic view of a cyclone produced by the kitchen fume-extracting and cooking equipment shown in Fig. 14.

Fig. 16 is a schematic view of a kitchen fume-extracting and cooking equipment according to another embodiment of the present disclosure.

Fig. 17 is a schematic view of a cyclone produced by the kitchen fume-extracting and cooking equipment shown in Fig. 16.

DETAILED DESCRIPTION

Embodiments of the present disclosure will be described in detail. The examples of the embodiments are illustrated in the accompanying drawings. The embodiments described herein with reference to the drawings are explanatory, used to generally understand the present disclosure, and cannot be construed to limit the present disclosure.

In the specification, it is to be understood that terms such as “central, ” “longitudinal, ” “lateral, ” “length, ” “width, ” “thickness, ” “upper, ” “lower, ” “front, ” “rear, ” “left, ” “right, ” “vertical, ” “horizontal, ” “top, ” “bottom, ” “inner, ” “outer, ” “clockwise, ” and “counterclockwise” should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present disclosure be constructed or operated in a particular orientation.

In the present disclosure, unless specified or limited otherwise, the terms “mounted, ” “connected, ” “coupled, ” “fixed” and the like are used broadly and may be, for example, fixed connections, detachable connections, or integral connections. They may also be mechanical or electrical connections; direct connections or indirect connections via intervening structures; or inner communications of two elements, which can be understood by those skilled in the art according to specific situations.

In the present disclosure, unless specified or limited otherwise, a structure in which a first feature is “on” or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature. It may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween. Furthermore, a first feature “on, ” “above, ” or “on top of” a second feature may include an embodiment in which the first feature is right or obliquely “on, ” “above, ” or “on top of” the second feature. Or, it means that the first feature is at a height higher than that of the second feature. For example, a first feature “below, ” “under, ” or “on bottom of” a second feature may include an embodiment in which the first feature is right or obliquely “below, ” “under, ” or “on bottom of” the second feature. It could also mean that the first feature is at a height lower than that of the second feature.

In the related art, a range hood generally generates a negative pressure at a fume suction port thereof by means of a rotating impeller, so that an airflow nearby the fume suction port may be sucked into the fume suction port. Actually, such a suction power decreases rapidly as a distance from the fume suction port increases. When the range hood is mounted to a standard height, the range hood has a fairly weak suction power nearby the surface of a range. During a numerical simulation research, inventors made the following conclusions from a pressure distribution pattern: a region nearby the range barely has a pressure difference from its surrounding environment, and thus there is insufficient power for driving the fumes to move towards the fume suction port; moreover, the suction power produced by the range hood has dispersive directions, so the range hood draws much air from other directions, not only the fumes below. Although the range hood has a relatively stable air exhaust rate, the exhaust rate of the fumes in the air/fume mixture is reduced due to mixing with the surrounding clean air.

Specifically, in a cooking process, the fumes are dispersed in various directions. The further the fumes are away from a fume source, the larger the movement of the cross-sectional area of the fumes is, and the more difficult it is for the fumes to be gathered into an airflow with a smaller cross-sectional area so as to flow through the fume suction port of the range hood. The lower the position of fume sources, the weaker a gathering force of the range hood on the fumes are, thus causing an ineffective fume gathering of the range hood and a high escaping rate of the fumes. If the fumes cannot be drawn away in time, the fumes spread all around under an action of gravity, thus further reducing the fume extracting effect.

In the related art, in order to increase a clearance rate of the fumes, the number of impellers is usually increased in the design of the range hood, so as to increase the power of the range hood and therefore improve the air exhaust rate of the range hood. However, the effectiveness for a range hood to capture fumes cannot be increased, and the exhaust rate of the clean air is also increased while the exhaust rate of the fumes is increased, and thus the actual (or net) exhaust rate of the fumes cannot be increased proportionally by an increase of the power of the range hood. In addition, such a manner may increase the energy consumption and noise, and thus requirements for further improvement still exist.

A fume cyclonic-collection device 200 of a range hood according to embodiments of the present disclosure is described with reference to Fig. 1-Fig. 17.

As illustrated in Fig. 1 to Fig. 17, the fume cyclonic-collection device 200 of the range hood according to embodiments of the present disclosure includes an air guiding piece (e.g. an air pipe 21 and an air guiding plate 24 to be described below) . The air guiding piece is provided with an air channel 21a therein, and has an air inlet 21b and an air outlet 21c (24c) communicated with the air channel 21a. The air guiding piece generates a tornado-shaped cyclone (s) configured for cyclonic collection of fumes through an airflow sprayed out of the air outlet 21c (24c) .

In the fume cyclonic-collection device 200 according to embodiments of the present disclosure, air enters the air channel 21a through the air inlet 21b, the airflow is exhausted out of the air outlet 21c (24c) , and the airflow exhausted out of the air outlet 21c (24c) applies a powerful shear force on the surrounding air and fumes, so as to drive the surrounding air and fumes to flow and hence to form a tornado-shaped cyclone (s) . The fumes rise spirally under a powerful action of the cyclone and are prevented from spreading all around, such that the extent of the suction power of the range hood is enlarged, the power requirement for the range hood is reduced, energy consumption is decreased, and noises of the range hood are further reduced thereby improving the quality and performance of the range hood.

In some embodiments, the range hood includes a hood body 100, and the air guiding piece extends substantially along the vertical direction between a lower edge of the hood body 100 and a range 300.

During the cooking, the hood body 100 and the fume cyclonic-collection device 200 are started, the airflow is exhausted out of the air outlet 21c (24c) of the air guiding piece and drives the surrounding air and fumes to flow so as to form a tornado-shaped cyclone (s) , and hence the fumes are concentrated in a middle area between the hood body 100 and the range 300. That is, the fumes are gathered in the middle area between the hood body 100 and the range 300 from all around. Under the action of the cyclone, the fumes around enter the aforementioned middle area and rise spirally instead of spreading all around, and are finally exhausted through the fume suction port of the hood body 100.

Thus, the air enters the air channel 21a through the air inlet 21b and is exhausted out of the air outlet 21c (24c) , so as to apply a powerful shear force on the surrounding air and fumes, thus driving the surrounding air and fumes to flow. Finally, a tornado-shaped cyclone (s) is formed between the range 300 and the hood body 100. The fumes rise spirally under an action of the strong suction power of the cyclone and are prevented from spreading all around, such that the extent of the suction power of the hood body 100 is enlarged, the power requirement for the hood body 100 is reduced, energy consumption is decreased, and noises of the hood body 100 are further reduced thereby improving the quality and performance of the whole range hood.

In some embodiments, the air guiding piece is mounted to the hood body 100, the air guiding piece has an upper end connected with the lower edge of the hood body 100 at the rear side thereof, and a lower end is spaced apart from the upper surface of the range 300. In some other embodiments, the air guiding piece is mounted to the range 300.

In some embodiments, the fume cyclonic-collection device 200 further includes a fan 22. The fan 22 is connected with the air guiding piece and configured to provide air into the air channel 21a to form the airflow.

When the fume cyclonic-collection device 200 operates, the fan 22 provides air from the surrounding environment into the air channel 21a through the air inlet 21b to form the airflow. The airflow is then exhausted out of the air outlet 21c (24c) and applies a powerful shear force on the surrounding air and fumes, so as to drive the surrounding air and fumes to flow, and finally a tornado-shaped cyclone (s) is formed in the middle area between the range hood and the range 300.

Specifically, when cooking food, the fume cyclonic-collection device 200 is started, the air from the surrounding environment enters the air channel 21a through the air inlet 21b under the action of the fan 22 and is exhausted out of the air outlet 21c (24c) . The airflow exhausted out of the air outlet 21c (24c) drives the surrounding air and fumes to form a tornado-shaped cyclone (s) , so as to concentrate and restrict the fumes in the middle area between the range hood and the range 300; that is, the fumes are gathered in the middle area between the range hood and the range 300 from all around. Under a cyclonic-collection action of the airflow, the fumes around enter the aforementioned middle area and rise spirally instead of spreading all around, and are finally exhausted through the fume suction port of the hood body 100.

In some embodiments, the fan 22 is disposed outside of the air guiding piece and communicated with the air channel 21a by means of an air guiding pipe. In other embodiments, the fan 22 is disposed inside the air channel 21a and adjacent to an end of the air guiding piece. The air inlet 21b is adjacent to the fan 22, and the air outlet 21c (24c) includes at least one slit and/or a plurality of holes.

In some embodiments, the fume cyclonic-collection device 200 further includes a smart controller 23. The controller 23 is connected with the fan 22 and configured to control the rotating speed of the fan 22, so as to adjust the airflow intensity and the air volume flow rate, hence adjusting the strength of the tornado-shaped cyclone (s) formed in the middle area between the range hood and the range 300.

As illustrated in Fig. 1 to Fig. 11, according to some embodiments of the present disclosure, the air guiding piece includes at least one air pipe 21 extending substantially along the vertical direction, and the inner cavity of each air pipe 21 is configured as the air channel 21a.

In some embodiments, each air pipe 21 extends along the vertical direction from the hood body 100 to the range 300, the upper end of each air pipe 21 is connected with the lower edge of the hood body 100, and the lower end of each air pipe 21 is spaced apart from the surface of the range 300 by a certain distance. In other words, the length of each air pipe 21 is smaller than the distance between the lower edge of the hood body 100 and the surface of the range 300, and thus a connecting piece between the air pipe 21 and the surface of the range 300 is not required, so that the structure is simple and is easy to be assembled and disassembled at a low cost.

In some embodiments, the fume cyclonic-collection device 200 includes one air pipe 21, and the one air pipe 21 may be fixed to the hood body 100 and located between two fume sources of the range 300. When the range hood operates, the airflow exhausted out of the air pipe 21 may apply a powerful shear force on the air and the fumes produced by the two fume sources between the fume cyclonic-collection device 200 and the range 300, so that two tornado-shaped cyclones are produced and the fumes are prevented from spreading all around.

In some other embodiments, the fume cyclonic-collection device 200 may include a plurality of air pipes 21 spaced apart from one another, and each of the air pipes 21 extends substantially along the vertical direction and is connected with the hood body 100. Each air pipe 21 defines the air channel 21a therein, and the air channel 21a extends along the axial direction of the air pipe 21. The air pipe 21 is provided with the air inlet 21b communicated with the air channel 21a, and a plurality of air outlets 21c communicate with the air channel 21a and are spaced apart from one another along the axial direction of the air pipe 21.

Further, each of the air pipes 21 may be provided with one fan 22 therein. In some embodiments, the one fan 22 may be disposed outside of the plurality of air pipes 21 and the plurality of air pipes 21 may share the one fan 22. The airflows sprayed out of the air outlets 21c of the plurality of air pipes 21 drives the surrounding air and fumes to flow so as to form a column-shaped cyclone.

As illustrated in Fig. 7 to Fig. 11, in some embodiments, a sealing plug 213 is provided at each of two ends of the air pipe 21, specifically at each end of the pipe body 211 of the air pipe 21. The air inlet 21b and the air outlet 21c are provided on a side wall of the pipe body 211 of the air pipe 21 respectively, and the fan 22 is disposed in the air channel 21a. By providing the sealing plug 213 at each end of the pipe body 211, it is beneficial for the sealing property of the air channel 21a, and hence air tightness of the air channel 21a is ensured, such that the airflow entering the air channel 21a through the air inlet 21b may be exhausted out of the air outlet 21c without any leakage. This improves the performance of the fume cyclonic-collection device 200.

In some embodiments, the fan 22 is disposed adjacent to an end of the air pipe 21 and adjacent to the air inlet 21b. For example, the air channel 21a extends along the axial direction of the air pipe 21, and the air inlet 21b may be provided at an end of the air channel 21a (an upper end shown in Fig. 7) . The fan 22 is disposed in the air channel 21a and adjacent to the upper end of the air channel 21a, and the airflow entering the air channel 21a through the air inlet 21b is accelerated under the action of the fan 22 and finally exhausted out of the air outlet 21c located below the fan 22.

Thus, with the fan 22 being adjacent to the air inlet 21b, a suction power of the fan 22 on the air from the surrounding environment is ensured so a volume of the airflow enters the air channel 21a, and so the airflow entering the air channel 21a is prevented from attenuating between the fan 22 and the air inlet 21b. This reduces the energy loss of the airflow.

As illustrated in Fig. 5 to Fig. 8, each air pipe 21 is disposed to the hood body 100 and rotatable around its own axis, so as to adjust the cyclone conveniently.

In some embodiments, the pipe body 211 of the air pipe 21 includes the first pipe section 2111 and the second pipe section 2112. The first pipe section 2111 and the second pipe section 2112 extend along the vertical direction respectively, and a lower end of the first pipe section 2111 is connected with an upper end of the second pipe section 2112. The air channel 21a is defined by inner cavities of the first pipe section 2111 and the second pipe section 2112, the air inlet 21b is provided at a side wall of the first pipe section 2111, the fan 22 is disposed in the inner cavity of the first pipe section 2111, and the air outlet 21c is provided at a side wall of the second pipe section 2112.

In some embodiments, the second pipe section 2112 is rotatable around the axis of the air pipe 21 with respect to the first pipe section 2111. When the fume cyclonic-collection device 200 operates, the fan 22 sucks the air from the surrounding environment into the air channel 21a, and the airflow in the air channel 21a is exhausted out of the air outlet 21c of the second pipe section 2112. As the second pipe section 2112 is rotatable with respect to the central axis of the first pipe section 2111, an air jet angle (viz. the direction of airflow) of the air outlet 21c may be adjusted by rotating the air pipe according to requirements. The air jet angle may be adjusted automatically by means of the smart controller 23 so as to ensure that the airflow exhausted out of the plurality of air pipes 21 may apply a powerful shear force to the surrounding air and fumes, so that the surrounding air and fumes are driven to flow, and finally a tornado-shaped cyclone (s) is formed in the middle area, thus improving the fume extracting effect of the hood body 100.

In some embodiments, a plurality of air outlets 21c is provided and each air outlet 21c is configured to be hole-shaped. The plurality of air outlets 21c is arranged along the axial direction of the second pipe section 2112. Specifically, the plurality of air outlets 21c is arranged along the axial direction of the second pipe section 2112 and spaced apart from one another, and each air outlet 21c is configured as a hole-shaped structure communicated with the air channel 21a such as a circular hole, a square hole or a hole of an arbitrary shape. The airflow in the air channel 21a of each air pipe 21 is exhausted out of the plurality of the air outlets 21c to form an airflow plane parallel to an imaginary plane where a longitudinal section of the second pipe section 2112 (cutting through the air outlets 21c) is located. The airflows of the plurality of air pipes 21 all flow towards a central area surrounded by the plurality of air pipes 21, such that it is to ensure that the airflows blown out of the plurality of air pipes 21 may drive the surrounding air and fumes to flow and finally a tornado-shaped cyclone (s) is formed in the aforementioned central area, thus improving the fume extracting effect of the hood body 100.

In some embodiments, the air outlet 21c is configured to be a slit extending along the axial direction of the second pipe section 2112. Specifically, the second pipe section 2112 is provided with a plurality of air outlets 21c spaced apart from one another along the axial direction of the second pipe section 2112, and each air outlet 21c is the slit extending along the axial direction of the second pipe section 2112 such that a specific air volume flow rate of the air outlets 21c of the second pipe section 2112 is ensured. This facilitates the formation of a tornado-shaped cyclone (s) and also improves the effectiveness of the tornado-shaped cyclone (s) .

In some embodiments of the present disclosure, the air pipe 21 may be configured to be a straight pipe extending along the vertical direction. The length of the air pipe 21 is adjustable along the axial direction of the air pipe 21, such that the vertical extent of the airflow plane of the exhausted air may be adjusted. Hence the tornado-shaped cyclone (s) may be adaptively adjusted, thus improving the fume extracting effect.

In some embodiments, the air pipe 21 is configured to be a telescopic pipe. For example, the air pipe 21 may be configured to be in the form of a sleeve pipe.

As illustrated in Fig. 9 to Fig. 11, in the present embodiment, the air pipe 21 includes the first pipe section (not shown in Fig. 9 to Fig. 11) and the second pipe section 2112, and the air channel 21a is formed by the inner cavities of the first pipe section and the second pipe section 2112. The fan 22 is disposed in the first pipe section, and the air inlet 21b is provided at an end of the first pipe section as illustrated in Figs. 7 and 8. The plurality of air outlets 21c is provided at a side wall of the second pipe section 2112.

The second pipe section 2112 is configured as a telescopic pipe section and includes at least two segments in which one fits over the other one. One of the at least two segments of the second pipe section 2112 is axially movable relative to the other one, so as to adjust the length of the second pipe section 2112 and hence adjust the length of the air pipe 21. In the use of the fume cyclonic-collection device 200, it is possible to adjust the length of the air pipe 21 according to requirements and hence adjust the total area of air outlets 21c and the corresponding air volume flow rate.

At least one sealing ring 2113 is provided between two segments of the second pipe section 2112, so as to ensure a sealing property between two adjacent segments. This ensures the sealing property of the air channel 21a.

It could be understood by those skilled in the related art that a structure of the air pipe 21 is not limited to this. For example, the second pipe section 2112 may be rotated with respect to the first pipe section 2111 so as to adjust the air jet angle of the air exhausted out of the air outlets 21c of the second pipe section 2112. The second pipe section 2112 may also realize extension and retraction thereof by means of its own structure so as to adjust the overall length of the air pipe 21 and hence adjust the air volume flow rate.

As illustrated in Fig. 12 to Fig. 17, in some other embodiments, the air guiding piece is configured to be the air guiding plate 24 extending along the vertical direction. The air guiding plate 24 may be fixed to the hood body 100 or the range 300, or may be fixed to a rear wall to form a back plate.

The air channel 21a is inside the air guiding plate 24, and the air guiding plate 24 is provided with the air inlet (not shown in the embodiments of Fig. 12 to Fig. 17) and a plurality of columns of air outlets 24c. The air inlet and each air outlet 24c communicate with the air channel 21a respectively.

In some embodiments, the air guiding plate 24 is configured as an integral plate. The air guiding plate 24 may be attached to the rear wall, or an upper edge of the air guiding plate 24 is connected with the lower and the rear edge of the hood body 100 (i.e., the lower edge of the hood body 100 at the rear side thereof) , or the lower edge of the air guiding plate 24 is connected with the rear portion of the range 300.

A front surface of the air guiding plate 24 is provided with the air outlet 24c opened forwards. The airflow exhausted out of the air outlet 24c applies a powerful shear force on the fumes from the fume source, so as to drive the surrounding air and fumes to form a column-shaped cyclone extending from the fume source towards the fume suction port 11.

Thus, as being configured to be an integral plate, the air guiding plate 24 and the hood body 100 appear to be integrated seamlessly, such that the air guiding plate 24 is easy to mount and also convenient to clean, thus improving user experience. In addition, decorating pieces such as stickers may be pasted on the whole air guiding plate 24 to play a role of decoration and hence to improve aesthetics, thus further improving user experience. Furthermore, the air guiding plate 24 protects the surface of the rear wall, facilitates cleaning, achieves a decorating effect and provides an aesthetic appearance. Since the environment of the whole kitchen will look elegant, the user will have increased pleasure when cooking food; hence the user experience is improved.

In some other embodiments, the air guiding plate 24 includes a plurality of sub-plates spaced apart from one another along the left and right directions. The plurality of sub-plates may be arranged on the same plane and each sub-plate may extend along the vertical direction.

In some specific embodiments, each sub-plate of the air guiding plate 24 is provided with one column, or a plurality of columns of air outlets 24c arranged in the vertical direction, so that the airflow exhausted out of the air outlet 24c drives the surrounding air and fumes to flow. This forms a column-shaped cyclone (s) in the middle area between the range 300 and the hood body 100.

The range hood according to embodiments of the present disclosure will be described in conjunction with Fig. 1 to Fig. 17.

As illustrated in Fig. 1 to Fig. 17, the range hood according to embodiments of the present disclosure includes the hood body 100 and the fume cyclonic-collection device 200. The hood body 100 is provided with the fume suction port 11 and a fume exhaust port, and the fume cyclonic-collection device 200 defines the air channel 21a therein. The air channel 21a is provided with the air inlet 21b and the air outlet 21c (24c) . The fume cyclonic-collection device 200 is configured to generate a tornado-shaped cyclone (s) through the airflow sprayed out of the air outlet 21c (24c) , and the tornado-shaped cyclone (s) is configured to cyclonically collect the fumes so as to guide the fumes to the fume suction port 11.

In the range hood according to embodiments of the present disclosure, the fume cyclonic-collection device 200 generates a tornado-shaped cyclone (s) in the middle area between the range 300 and the hood body 100, and thus a powerful gathering force is produced. The vertical extent of this is from the range 300 to the hood body 100, so as to prevent the fumes from escaping outwards and guide the suction force of the hood body 100 to orient towards the fume source, so that the fumes may move towards the fume suction port 11 under an action of the suction force, thus improving the fume extracting efficiency of the hood body 100 and reducing energy consumption and noises.

According to an embodiment of the present disclosure, the fume cyclonic-collection device 200 is mounted to the lower edge of the hood body 100 and extends downwards from the hood body 100 to be close to the range 300.

In some embodiments, an upper end of the fume cyclonic-collection device 200 is connected with the lower edge of the hood body 100 at the rear side thereof, and a lower end of the fume cyclonic-collection device 200 is disposed close to the upper surface of the range 300. This ensures that the airflow exhausted out of the air outlet 21c (24c) of the fume cyclonic-collection device 200 may drive the surrounding air and fumes to flow, so as to form a tornado-shaped cyclone (s) in the middle area between the range 300 and the fume suction port 11. This prevents the fumes from spreading all around.

It could be understood that the upper end of the fume cyclonic-collection device 200 is connected with the lower edge of the hood body 100, so that the space occupied by the fume cyclonic-collection device 200 is decreased and the cost is reduced as much as possible; this is based on the premise of ensuring a normal function of the fume cyclonic-collection device 200. Thus, the range hood has a simple and compact structure, a reliable connection among the various components, a high reliability of usage and a high cost-performance ratio, and is convenient to assemble and disassemble.

Specifically, the fume cyclonic-collection device 200 is disposed between the hood body 100 and the surface of the range 300, and extends along the vertical direction. The upper end of the fume cyclonic-collection device 200 may be fixed to the hood body 100, and the lower end of the fume cyclonic-collection device 200 is spaced apart from the surface of the range 300 such that the fume cyclonic-collection device 200 is convenient to mount and dismount. When the user needs to clean the fume cyclonic-collection device 200, the fume cyclonic-collection device 200 may be detached just by separating its upper end from the hood body 100, thus providing a convenient operation. In addition, since the fume cyclonic-collection device 200 and the hood body 100 are assembled as a whole, different arrangements of the range 300 will not be influenced.

Further, the hood body 100 is provided with the fume suction port 11 at a lower surface thereof. The upper end of the fume cyclonic-collection device 200 is connected with the lower edge of the hood body 100 and keeps away from the fume suction port 11. The lower end of the fume cyclonic-collection device 200 is spaced apart from the range 300 in the vertical direction (i.e., up and down directions as shown in Fig. 1) .

In some embodiments, the upper end of the fume cyclonic-collection device 200 is connected with the hood body 100, and the lower end of the fume cyclonic-collection device 200 extends to a position close to the surface of the range 300. This is so that the air output of the fume cyclonic-collection device 200 may be distributed in the whole area between the hood body 100 and the surface of the range 300, and the cyclone (s) produces a powerful gathering force, the vertical extent of which is between the range 300 and the hood body 100. This improves the fume extracting efficiency.

In another embodiment, the fume cyclonic-collection device 200 is mounted to the range 300 and extends upwards to be close to the hood body 100.

In some embodiments, the lower end of the fume cyclonic-collection device 200 is fixed to the rear edge of the upper surface of the range 300, and the upper end of the fume cyclonic-collection device 200 is disposed close to the lower edge of the hood body 100.

Specifically, the fume cyclonic-collection device 200 is disposed between the hood body 100 and the surface of the range 300, and extends along the vertical direction. The lower end of the fume cyclonic-collection device 200 may be fixed to the surface of the range 300, and the upper end of the fume cyclonic-collection device 200 is spaced apart from the hood body 100, such that the fume cyclonic-collection device 200 is convenient to mount and dismount. When the fume cyclonic-collection device 200 needs to be cleaned, the fume cyclonic-collection device 200 may be detached just by separating the lower end of the fume cyclonic-collection device 200 from the surface of the range 300. This provides a convenient operation without influencing the arrangement of the hood body 100.

Advantageously, an upper end of the cyclone is close to the fume suction port 11, and a lower end of the cyclone is close to the range 300. This means that when the range hood operates, the fume cyclonic-collection device 200 may drive the air and fumes around the fume source to flow, so as to form a tornado-shaped cyclone (s) above the range 300 and below the fume suction port 11. The surrounding fumes are gathered by the cyclone and rise spirally; they then enter the hood body 100 through the fume suction port 11, and finally are exhausted outside after passing through a filtering device.

In some embodiments, the fume cyclonic-collection device 200 may also be mounted to a wall behind the range 300 and the hood body 100.

In some embodiments, the fume cyclonic-collection device 200 is located between the range 300 and the hood body 100 in the vertical direction. That is, the fume cyclonic-collection device 200 is not connected with the hood body 100 and the range 300, but the fume cyclonic-collection device 200 is mounted to the wall. This means there is no need to change structures of the range 300 and the hood body 100, and thus the mounting cost is low.

In some embodiments, the air outlet 21c (24c) may be configured to be the slit extending along the vertical direction. One or more slits may be provided. The surrounding air enters the air channel 21a of the fume cyclonic-collection device 200 through the air inlet 21b to form the airflow, and then the airflow is exhausted out of the slit to form an air curtain extending along the vertical direction. The air curtain may drive the surrounding air and fumes to flow, and hence apply the shear force on the fumes from the fume source; this forms a tornado-shaped cyclone (s) in the middle area between the range 300 and the fume suction port 11.

In some embodiments, the air outlet 21c (24c) may include a plurality of holes spaced apart from one another along the vertical direction, and the plurality of holes may be arranged in one column extending along the vertical direction. It may also be arranged in a plurality of rows and columns.

In some embodiments, the fume cyclonic-collection device 200 includes at least one air pipe 21. The air channel 21a is formed by the inner cavity of the air pipe 21, and the air pipe 21 is connected with the hood body 100 or mounted to the range 300.

In some embodiments, the fan 22 and the air inlet 21b may be provided at either end or both ends of the air pipe 21. For example, the fan 22 may be provided at a lower end of the air pipe 21, and the air inlet 21b may be provided at a lower end of the air pipe 21. Or, the fan 22 may be provided at both ends of the air pipe 21, and the air inlet 21b may be provided at both ends of the air pipe 21.

In some embodiments, the fan 22 is disposed outside of the air pipe 21 and communicated with the air channel 21a through the air guiding pipe. When the fume cyclonic-collection device 200 operates, the air from the surrounding environment enters the fan 22 to form a high-speed airflow under an action of the fan 22. The high-speed airflow then enters the plurality of air pipes 21 through the plurality of air guiding pipes and finally is exhausted out of the air outlets 21c of the plurality of air pipes 21. That is, the plurality of air pipes 21 share one fan 22 or a plurality of fans 22, such that it is to ensure that each air pipe 21 has an optimal air volume flow rate. This ensures the quality and performance of tornado-shaped cyclone (s) .

In some embodiments, the air pipe 21 is mounted to, and is detachable from, the hood body 100. For example, the lower edge of the hood body 100 is provided with a screwing connector (not shown) , and the upper end of the air pipe 21 is correspondingly provided with a connecting portion configured to be fitted with the screwing connector such that a detachable connection between the hood body 100 and the air pipe 21 is realized and the assembling and disassembling are convenient. This facilitates the maintenance and replacement of components.

In some embodiments, the air pipe 21 may be mounted to the hood body 100 while being rotatable around the axis of the air pipe 21.

In some embodiments, the air pipe 21 is a straight pipe extending substantially along the vertical direction, and the length of the air pipe 21 is adjustable along the axial direction of the air pipe 21.

According to another embodiment of the present disclosure, the fume cyclonic-collection device 200 includes the fan 22 and the air guiding plate 24. The air guiding plate 24 defines the air channel 21a therein, and is provided with the air inlet 21b and the air outlet 24c communicated with the air channel 21a. The fan 22 is connected with the air guiding plate 24 so as to form the airflow in the air channel 21a, and the air guiding plate 24 uses the airflow spayed out of the air outlet 24c to generate a cyclone (s) .

A plurality of specific embodiments of the range hood according to the present disclosure will be described below.

Embodiment One

As illustrated in Fig. 1 and Fig. 2, the projection of the hood body 100 on a horizontal plane is substantially rectangular. That is, an outer contour line of the lower edge of the hood body 100 has a rectangular shape. The hood body 100 is provided with at least one fume suction port 11. The fume cyclonic-collection device 200 includes two air pipes 21, and the two air pipes 21 are disposed to the lower edge of the hood body 100 at the rear side thereof and spaced apart from each other along the left and right directions.

When the hood body 100 operates, along the vertical direction, an area close to the hood body 100 is a low pressure area and an area close to the range 300 is a high pressure area. This is so that a pushing force oriented from the bottom up is generated by a pressure difference between the low pressure area and the high pressure area. Meanwhile, the airflows exhausted out of the air outlets 21c of the two air pipes 21 of the fume cyclonic-collection device 200 apply a shear force on the air and fumes between the range 300 and the hood body 100, so as to drive the surrounding air and fume to form a tornado-shaped cyclone (s) rising spirally.

The direction of air jets from the two air pipes 21 is pointed forward, and hence the two air pipes 21 generate a powerful gathering force such that the airflow around the range 300 may be drawn towards the central area above the range 300. Moreover, the two air pipes 21 also apply a shear force on the fumes and the surrounding air respectively, so as to produce double cyclones such that the fumes produced by the two fume sources rise spirally and arrive at the corresponding fume suction port 11 respectively. In this process, the fumes do not spread all around under the action of the cyclones, thus improving the fume extracting effect.

In some embodiments, one of the two air pipes 21 is located at the left side of the leftmost burner 31 in the range 300, and the other one of the two air pipes 21 is located at the right side of the rightmost burner 31 in the range 300.

Specifically, the range 300 may be provided with two, three or four burners 31. If two burners 31 are provided in the range 300, one of the two air pipes 21 is disposed at the left-rear side of the left burner 31 and the other one of the two air pipes 21 is disposed at the right-rear side of the right burner 31. If three burners 31 are provided in the range 300 and spaced apart from one another along the left and right direction, one of the two air pipes 21 is disposed at the left-rear side of the leftmost burner 31 and the other one of the two air pipes 21 is disposed at the right-rear side of the rightmost burner 31. If four burners 31 are provided in the range 300 and arranged in two rows and two columns, one of the two air pipes 21 is disposed at the left-rear side of the two left burners 31 and the other one of the two air pipes 21 is disposed at the right-rear side of the two right burners 31.

Embodiment Two

The projection of the hood body 100 on a horizontal plane is substantially rectangular. The fume cyclonic-collection device 200 includes three air pipes 21, and the three air pipes 21 are disposed to the lower edge of the hood body 100 at the rear side thereof respectively and spaced apart from one another along the left and right directions. The air pipe 21 located in the middle may output air towards the air pipe 21 located at the left side and/or the air pipe 21 located at the right side, so as to add a shear force in a direction tangential to the (circular-sectioned) fumes from the fume source of the corresponding burner 31. This enhances the effect of the generated tornado-shaped cyclone (s) and improves the fume extracting effect.

In some embodiments, the first one of the three air pipes 21 (i.e., the left air pipe 21 in Fig. 3 and Fig. 4) is located at the left side of the leftmost burner 31 on the range 300. The second one of the three air pipes 21 (i.e., the right air pipe 21 in Fig. 3 and Fig. 4) is located at the right side of the rightmost burner 31 in the range 300. The third one of the three air pipes 21 (i.e., the middle air pipe 21 in Fig. 3 and Fig. 4) is located between two adjacent burners 31 on the range 300. The air outlets 21c of the left and right air pipes 21 are opened forwards, and the opening direction of the air outlet (s) 21c of the middle air pipe 21 has an angle between -90 degrees and 90 degrees relative to the forward direction in which the air outlets 21c of the left and right air pipes 21 are opened.

In the embodiments shown in Fig. 3 and Fig. 4, the range 300 is provided with two burners 31. The axes of the three air pipes 21 are in the same direction, and the upper end of each air pipe 21 is connected with the lower edge of the hood body 100. The leftmost one of the three air pipes 21 is disposed on the left part of the surface of the range 300, and the rightmost one of the three air pipes 21 is disposed on the right part of the surface of the range 300. That is, the first one of the three air pipes 21 is located at the left-rear side of the leftmost burner 31 on the range 300, and the second one of the three air pipes 21 is located at the right-rear side of the rightmost burner 31 on the range 300, i.e. such two air pipes 21 are located at the left side and the right side of all the burners 31 on the range 300 respectively. The projected area of the middle air pipe 21 in the three air pipes 21 (i.e., the third one of the three air pipes 21) on the surface of the range 300 is located between the two burners 31 and at the rear side of the two burners 31. The three air pipes 21 output air respectively. When the user uses the two burners 31 to cook simultaneously, the air exhausted out of the three air pipes 21 improves the effect of the tornado-shaped cyclone (s) generated by the fume cyclonic-collection device 200, thus further improving the fume extracting effect.

Each of the first air pipe 21 and the second air pipe 21 is provided with the air outlets 21c opened forwards, and the third air pipe 21 is provided with the air outlets 21c opened towards the first air pipe 21 and/or the second air pipes 21. That is, the air pipe 21 located in the middle may output air towards the first air pipe 21 located at the left side and/or the second air pipe 21 located at the right side respectively, thus realizing a bidirectional air flow.

When the range hood operates, the three air pipes 21 of the fume cyclonic-collection device 200 work simultaneously. The air pipe 21 located at the left side and the air pipe 21 located at the right side outputs air forwards respectively, and the air pipe 21 located in the middle outputs air leftwards and rightwards. The airflow exhausted out of the air pipe 21 is located at the left side and configured to output air forwards, and the airflow exhausted out of the air pipe 21 is located in the middle and configured to output air leftwards. Together, they may apply a powerful shear force on the fumes from the fume source located at the left side and the surrounding air thereof, so as to form a tornado-shaped cyclone (s) between the fume source located at the left side and the hood body 100. The airflow exhausted out of the air pipe 21 -which is located at the right side and configured to output air forwards, and the airflow exhausted out of the air pipe 21 which is located in the middle and configured to output air rightwards -may apply a powerful shear force on the fumes from the fume source located at the right side and the surrounding air thereof, so as to form a tornado-shaped cyclone (s) between the fume source located at the right side and the hood body 100.

Thus, by adding the air pipe 21 which is located in the middle and configured to blow air in double directions, each of the three air pipes 21 may add a shear force in a direction tangential to the (circular-sectioned) fumes from the fume source of each burner 31. This is to enhance the effect of the generated tornado-shaped cyclones and hence improve the fume extracting effect.

Embodiment Three

As illustrated in Fig. 5 and Fig. 6, the outer contour line of the lower edge of the hood body 100 is substantially rectangular in shape. The fume cyclonic-collection device 200 includes four air pipes 21, and the four air pipes 21 are disposed at the four corners of the hood body 100. Each air pipe 21 extends along the vertical direction (i.e., the up and down directions illustrated in Fig. 5) , and the upper end of each air pipe 21 is connected with the lower edge of the hood body 100.

The fume source is located in a central area surrounded by the four air pipes 21. Each air pipe 21 is provided with the air outlet 21c, and the air outlet 21c is close to the fume source of the range 300. The direction of air jets from the air outlet 21c is tangential to the (circular-sectioned) fumes from the fume source. When the fume cyclonic-collection device 200 operates, the air outlets 21c of the four air pipes 21 output air simultaneously, and hence a powerful gathering force is produced such that the airflow around the range 300 may be drawn towards the central area above the range 300. That is, a tornado-shaped cyclone is generated by the four air pipes 21 and acts on the fume source located sideways. On a horizontal cutting plane, the directions of air jets from the air outlets 21c of the four air pipes 21 are tangential to the (circular-sectioned) fumes from the fume source and follow a clockwise or counterclockwise direction. Hence the tornado-shaped cyclone is produced successfully, such that the fumes generated by the fume source rise spirally to arrive at the fume suction port 11, and the fume does not spread all around in this process.

It should be noted herein that the number and positions of the air pipes 21 may be set according to the position of the fume source on the range 300, the position of the fume suction port 11 on the hood body 100, and an overall length of the air pipe 21 may be determined according to the distance between the hood body 100 and the range 300 which have been mounted. The length of the air pipe 21 may be adjusted by the smart controller 23 automatically according to the user’s choice.

Embodiment Four

As illustrated in Fig. 12 and Fig. 13, in the present embodiment, the outer contour line of the lower edge of the hood body 100 is substantially rectangular in shape. The hood body 100 is provided with at least one fume suction port 11.

The fume cyclonic-collection device 200 includes the air guiding plate 24. The air guiding plate 24 is a one-piece plate. The air guiding plate 24 is disposed to the lower edge of the hood body 100 at the rear side thereof, and, specifically, an upper end of the air guiding plate 24 is connected with the lower edge of the hood body 100. The air guiding plate 24 is provided with one column of air outlets 24c and the one column of air outlets 24c are located between two burners 31 and configured to output air forwards. When the two burners 31 on the range 300 operate simultaneously, it is possible to share the air outlets 24c in the middle of the air guiding plate 24 by the two burners 31. That is, the airflow exhausted out of the air outlets 24c in the middle of the air guiding plate 24 applies a powerful shear force on the fume sources located at left and right sides respectively. This is to form two tornado-shaped cyclones between the two burners 31 on the range 300 and the hood body 100, i.e., one tornado-shaped cyclone between each burner 31 and the hood body 100.

Embodiment Five

As illustrated in Fig. 14 and Fig. 15, in the present embodiment, the outer contour line of the lower edge of the hood body 100 is substantially rectangular in shape arranged on the horizontal plane. The hood body 100 is provided with at least one fume suction port 11. The fume cyclonic-collection device 200 includes one air guiding plate 24. The air guiding plate 24 is disposed to the lower edge of the hood body 100 at the rear side thereof and extends along the left and right directions. The air guiding plate 24 is provided with two columns of air outlets 24c spaced apart from each other along the left and right directions.

When the fume cyclonic-collection device 200 operates, the two columns of air outlets 21c on the air guiding plate 24 output air simultaneously, and hence the powerful gathering force is produced such that the airflow around the range 300 may be gathered above the range 300. That is, the airflows exhausted out of the two columns of air outlets 24c on the air guiding plate 24 may drive the surrounding air to flow, so as to form two tornado-shaped cyclones configured to respectively act on the fume sources located at left and right sides. The two columns of air outlets 24c on the air guiding plate 24 output air jets in the forward direction, hence double tornado-shaped cyclones are produced such that the fumes produced by the two fume sources rise spirally to arrive at the corresponding fume suction port 11 respectively, and the fumes do not spread all around in this process.

In the two columns of air outlets 24c, one column of air outlets 24c are located at the left side of the leftmost burner 31 in the range 300, and the other column of air outlets 24c are located at the right side of the rightmost burner 31 in the range 300.

Specifically, the range 300 may be provided with two or four burners 31. When two burners 31 are provided on the range 300 and spaced apart from each other along the left and right directions, one column of air outlets 24c on the air guiding plate 24 are disposed at the left-rear side of the left burner 31, and the other column of air outlets 24c on the air guiding plate 24 are disposed at the right-rear side of the right burner 31. When four burners 31 are provided on the range 300 and arranged in two rows and two columns, one column of air outlets 24c on the air guiding plate 24 are disposed at the left-rear side of the two left burners 31, and the other column of air outlets 24c on the air guiding plate 24 are disposed at the right-rear side of the two right burners 31.

Embodiment Six

The projection of the hood body 100 on a horizontal plane is substantially rectangular. The fume cyclonic-collection device 200 includes one air guiding plate 24, the air guiding plate 24 is disposed to the lower edge of the hood body 100 at the rear side thereof, and extends along the left and right directions, and the air guiding plate 24 is provided with three groups of air outlets 24c spaced apart from one another along the left and right directions.

When the fume cyclonic-collection device 200 operates, the three groups of air outlets 24c may output air simultaneously or may be controlled to output air individually, so as to drive the air and fumes around the range 300 to flow, thus forming a tornado-shaped or column-shaped cyclone (s) .

In the three groups of air outlets 24c, the first group of air outlets 24c are located at the left side of the leftmost burner 31 on the range 300, the second group of air outlets 24c are located at the right side of the rightmost burner 31 on the range 300, and the third group of air outlets 24c are located between two adjacent burners 31 on the range 300. The air outlets 24c of the first group and the second group are opened forwards, and the opening directions of the air outlets 24c of the third group each has an angle between -90 degrees and 90 degrees relative to the forward direction in which the air outlets 24c of the first group and the second group are opened.

When the fume cyclonic-collection device 200 is applied to the range 300 having two burners 31, the leftmost group of air outlets 24c (i.e., the first group of air outlets 24c) on the air guiding plate 24 are located at the left side of the left burner 31, and the air outlets 24c of this group are opened forwards to output air forwards; the rightmost group of air outlets 24c (i.e., the second group of air outlets 24c) on the air guiding plate 24 are located at the right side of the right burner 31, and the air outlets 24c of this group are opened forwards to output air forwards; and the middle group of air outlets 24c (i.e., the third group of air outlets 24c) on the air guiding plate 24 is located between the two burners 31. The direction of air jets from openings of the air outlet 24c in the third group has an angle between -90 degrees and 90 degrees relative to the normal direction of the air guiding plate 24, and the air jets may be directed towards the left burner 31 and/or the right burner 31, so that the third group of air outlets 24c may cooperate with the first group of air outlets 24c and/or the second group of air outlets 24c to apply a powerful tangential shear force on the fume sources, i.e. adding the tangential shear force to the fume source of at least one of the two burners 31. This enhances the effect of the generated tornado-shaped cyclone (s) .

Embodiment Seven

As illustrated in Fig. 16 and Fig. 17, in the present embodiment, the outer contour line of the lower edge of the hood body 100 is substantially rectangular in shape. The fume cyclonic-collection device 200 includes two air guiding plates 24, and the two air guiding plates 24 are spaced apart from each other along the left and right directions. Each air guiding plate 24 is provided with one column of air outlets 24c, the air outlets 24c on one of the two air guiding plates 24 are located at the left side of the leftmost burner 31 on the range 300, and the air outlets 24c on the other one of the two air guiding plates 24 are disposed at the right side of the rightmost burner 31 on the range 300.

The kitchen fume-extracting and cooking equipment A (A1-A7) according to embodiments of the present disclosure will be described below with reference to Fig. 1 to Fig. 17.

As illustrated in Fig. 1 to Fig. 17, the kitchen fume-extracting and cooking equipment A according to embodiments of the present disclosure includes the range 300 and the range hood according to the above embodiments. The range 300 is provided with the burner 31 therein. The hood body 100 of the range hood is disposed above the range 300, and the fume cyclonic-collection device 200 of the range hood is disposed between the hood body 100 and the range 300.

According to embodiments of the present disclosure, the range hood has the above technical effects, the kitchen fume-extracting and cooking equipment A according to embodiments of the present disclosure also has the above technical effects. That is, the kitchen fume-extracting and cooking equipment A may also generate a powerful gathering force the vertical extent of which is from the range 300 to the hood body 100. This is to prevent the fumes from escaping outwards, and to orient and extend the suction force of the hood body 100 towards the fume source such that the fumes may move towards the fume suction port 11 under the action of the suction force once the fume is produced. When the fumes are finally exhausted out of the fume exhaust port, they thus provide high fume extracting efficiency, low power requirement, low energy consumption for producing a convergent airflow, and low operational noises.

When the user cooks with the range 300, the hood body 100 may be started, and also the fume cyclonic-collection device 200 may be started. The surrounding air enters the air channel 21a of the fume cyclonic-collection device 200 through the air inlet 21b to form the airflow, and the airflow exhausted out of the air outlet 21c (24c) of the fume cyclonic-collection device 200 drives the surrounding air and fumes to flow; this generates a tornado-shaped cyclone (s) between the range 300 and the fume suction port 11.

Specifically, when the kitchen fume-extracting and cooking equipment A operates, the hood body 100 draws and sucks the fume so that a pressure difference exists in a space between the range 300 and the hood body 100 in the up-and-down (i.e., vertical) direction. That is, when the hood body 100 operates, in the up-and-down direction, the area close to the hood body 100 is the low pressure area, and the area close to the range 300 is the high pressure area so that the pushing force oriented from the bottom up is generated by the pressure difference. Meanwhile, the convergent airflow exhausted out of the air outlet 21c (24c) of the fume cyclonic-collection device 200 gathers the air and the fumes between the range 300 and the hood body 100, and applies a powerful shear force to the convergent area, i.e. conditions for generating tornado-shaped cyclone (s) are met, so that the surrounding air and fumes are driven to form a tornado-shaped cyclone (s) rising spirally. That is, the airflow exhausted out of the air outlet 21c (24c) has a strong power which forces the surrounding substances to be involved in the cyclone with a spiral rising movement. As the tornado-shaped cyclone has a hollow pipe shape and contains an airflow rapidly moving upwards therein, the tornado-shaped cyclone seems like a natural and rapid substance transmission pipeline and hence may prevent the fumes from spreading all around.

The tornado-shaped cyclone has a powerful gathering force, so as to prevent the fumes from escaping all around. In addition, the suction force of the hood body 100 may be oriented and extended to the fume source of the range 300, and the fumes are sucked and delivered towards the fume suction port 11 of the hood body 100. Thus, the extent of the suction power of the hood body 100 is enlarged, the power requirement for the hood body 100 is significantly reduced, thereby reducing the energy consumption and decreasing the operational noise of the hood body 100.

Accordingly, the kitchen fume-extracting and cooking equipment A has good cooking effects, low operational noise, low power consumption, low energy consumption, high performance, low fume diffusion, and good user experience.

The fume cyclonic-collection device 200 may be mounted to the hood body 100 and extend downwards from the hood body 100 to be close to the range 300, or may also be mounted to the range 300 and extend upwards to be close to the hood body 100, or may further be disposed on the wall behind the range 300 and the hood body 100.

In some embodiments, a plurality of columns of air outlets 21c (24c) is provided, the air outlets 21c (24c) of the leftmost column and the rightmost column are opened forwards, and the opening directions of the air outlets 21c (24c) of the rest columns each has an angle between -90 degrees and 90 degrees relative to the forward direction in which the air outlets 21c (24c) of the leftmost column and the rightmost column of air outlets are opened.

In some embodiments, the opening direction of the air outlets 21c (24c) of the middle column may be oriented in a direction tangential to the (circular-sectioned) fumes from the left fume source and/or in a direction tangential to the (circular-sectioned) fumes from the right fume source, such that the shear force in the tangential direction may be added to the fume source of at least one of the two burners 31 or both burners 31. Or, the opening direction of the air outlets 21c (24c) of the middle column may be oriented in a direction tangential to the (circular-sectioned) fumes from the middle fume source, such that the fume source of the middle burner 31 may be subjected to the shear force in the tangential direction from the airflow exhausted out of the air outlets 21c (24c) of the middle column. Thus, the effect of the generated tornado-shaped cyclone (s) is enhanced and the fume extracting effect is further improved.

Reference throughout this specification to “an embodiment, ” “some embodiments, ” “one embodiment” , “another example, ” “an example, ” “a specific example, ” or “some examples, ” means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the appearances of the phrases such as “in some embodiments, ” “in one embodiment” , “in an embodiment” , “in another example, ” “in an example, ” “in a specific example, ” or “in some examples, ” in various places throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Although explanatory embodiments have been shown and described, it would be appreciated by those skilled in the art that the above embodiments cannot be construed to limit the present disclosure. Changes, alternatives, and modifications can be made in the embodiments without departing from spirit, principles and scope of the present disclosure.

Claims

A fume cyclonic-collection device for a range hood, comprising at least an air guiding piece, wherein the air guiding piece defines an air channel therein and has an air inlet and an air outlet that communicates with the air channel; the air guiding piece is configured to generate a tornado-shaped cyclone (s) for cyclonically collecting fumes through an airflow sprayed out of the air outlet.
The fume cyclonic-collection device according to claim 1, further comprising at least a fan, wherein the fan is connected with the air guiding piece and configured to provide air into the air channel to form the airflow.
The fume cyclonic-collection device according to claim 2, further comprising a smart controller, wherein the controller is connected with the fan and configured to control the rotating speed of the fan.
The fume cyclonic-collection device according to claim 2, wherein the range hood comprises a hood body, and the air guiding piece is provided between the lower edge of the hood body and a range, and extends along a substantially vertical direction,

wherein the air guiding piece is mounted to the hood body, the upper end of the air guiding piece is connected with the lower edge of the hood body at the rear side thereof, and the lower end of the air guiding piece is spaced apart from the upper surface of the range; or

the air guiding piece is mounted to the range.
The fume cyclonic-collection device according to claim 2, wherein the fan is disposed outside of the air guiding piece and communicated with the air channel through an air guiding pipe; or

the fan is disposed in the air channel and adjacent to an end of the air guiding piece, and the air inlet is adjacent to the fan.
The fume cyclonic-collection device according to claim 1, wherein the air guiding piece is configured as an air guiding plate extending along the vertical direction, and a plurality of columns of air outlets are provided, in which the air guiding piece comprises a one-piece plate or a plurality of plates spaced apart from one another along the left and right directions; or

wherein the air guiding piece comprises at least one air pipe extending substantially along the vertical direction.
The fume cyclonic-collection device according to any one of claims 1-6, wherein the air outlet comprises at least one of at least one slit and/or a plurality of holes.
A range hood, comprising:

a hood body provided with a fume suction port and a fume exhaust port; and

a fume cyclonic-collection device defining an air channel therein, in which the air channel has an air inlet and an air outlet, the fume cyclonic-collection device is configured to generate a tornado-shaped cyclone (s) through an airflow sprayed out of the air outlet, and the tornado-shaped cyclone (s) is configured for cyclonically collecting fumes so as to guide the fumes to the fume suction port.
The range hood according to claim 8, wherein the fume cyclonic-collection device is mounted to the rear edge of the hood body and extends downwards from the hood body to be close to a range, or the fume cyclonic-collection device is mounted to the range and extends upwards to be close to the hood body.
The range hood according to claim 8, wherein the air outlet comprises at least one slit and/or a plurality of holes.
The range hood according to claim 8, wherein the fume cyclonic-collection device comprises at least one air pipe, the air channel is defined by an inner cavity of the at least one air pipe, and the at least one air pipe is connected with the hood body or mounted to the range.
The range hood according to claim 11, wherein the projection of the hood body on a horizontal plane is substantially rectangular, and two or three air pipes are provided,

in the case that two air pipes are provided, the two air pipes are disposed to the lower edge of the hood body at the rear side thereof respectively and spaced apart from each other along the left and right directions, one of the two air pipes is located at the left side of the leftmost burner on the range, and the other one of the two air pipes is located at the right side of the rightmost burner on the range; or

in the case that three air pipes are provided, the three air pipes are disposed to the lower edge of the hood body at the rear side thereof respectively and spaced apart from one another along the left and right directions, the left air pipe of the three air pipes is located at the left side of the leftmost burner on the range, the right air pipe of the three air pipes is located at the right side of the rightmost burner on the range, and the middle air pipe of the three air pipes is located between two adjacent burners on the range; the air outlets of the left air pipe and the right air pipe are opened forwards, and the opening directions of the air outlet of the middle air pipe each has an angle between -90 degrees and 90 degrees relative to the forward direction in which the air outlets of the left air pipe and the right air pipe are opened.
The range hood according to claim 11, wherein the air pipe is mounted to the hood body and is detachable and/or rotatable around the axis of the air pipe.
The range hood according to claim 11, wherein the air pipe is configured as a straight pipe extending substantially along the vertical direction, and the air pipe is adjustable in length along the axial direction of the air pipe.
The range hood according to claim 8, wherein the fume cyclonic-collection device comprises an air guiding plate, the air guiding plate defines the air channel therein, and has the air inlet and the air outlet communicates with the air channel, and the air guiding plate is also configured to generate a cyclone (s) through the airflow sprayed out of the air outlet.
The range hood according to claim 15, wherein the projection of the hood body on a horizontal plane is substantially rectangular,

the air guiding plate is disposed to the lower edge of the hood body at the rear side thereof and extends along the left and right sides, the air guiding plate is provided with two groups of air outlets spaced apart from each other along the left and right directions; in the two groups of air outlets, one group of air outlets are located at the left side of the leftmost burner on the range, and the other group of air outlets are located at the right side of the rightmost burner on the range; or

the air guiding plate is provided with three groups of air outlets spaced apart from one another along the left and right direction; in the three groups of air outlets, the first group of air outlets are located at the left side of the leftmost burner on the range, the second group of air outlets are located at the right side of the rightmost burner on the range, and the third group of air outlets are located between two adjacent burners on the range; the air outlets of the first group and the second group are opened forwards, and the opening directions of the air outlets of the third group each has an angle between -90 degrees and 90 degrees relative to the forward direction in which the air outlets of the first group and the second group are opened.
The range hood according to claim 15, wherein the fume cyclonic-collection device further comprises at least a fan, and the fan is connected with the air guiding plate and configured to form the airflow in the air channel.
A kitchen fume-extracting and cooking equipment, comprising:

a range provided with a burner (s) ; and

a range hood according to any one of claims 8-17, wherein the hood body of the range hood is disposed above the range, and the fume cyclonic-collection device of the range hood is disposed between the hood body and the range.
The kitchen fume-extracting and cooking equipment according to claim 18, wherein a plurality of columns of air outlets is provided; in the plurality of columns of air outlets, the leftmost column of air outlets and the rightmost column of air outlets are opened forwards, and the opening directions of the air outlets of the rest columns each has an angle between -90 degrees and 90 degrees relative to the forward direction in which the air outlets of the leftmost column and the rightmost column are opened.
The kitchen fume-extracting and cooking equipment according to claim 18, wherein the fume cyclonic-collection device is configured in one of following manners:

(1) the fume cyclonic-collection device is mounted to the hood body and extends downwards from the hood body to be close to the range;

(2) the fume cyclonic-collection device is mounted to the range and extends upwards to be close to the hood body;

(3) the fume cyclonic-collection device is disposed on a wall behind the range and the hood body.