CN214700897U - Fume exhaust fan - Google Patents

Abstract

The utility model relates to a kitchen appliance technical field provides a lampblack absorber. The method comprises the following steps: the cross-flow fan is arranged in the machine body, and the extension direction of the cross-flow fan is along the width direction of the machine body; the thickness of the machine body at the position of the cross flow fan is the largest. The utility model discloses be favorable to reducing the complete machine volume for organism cavity space utilization obtains improving, and structural configuration is compacter, thereby makes complete machine occupation space reduce, is favorable to alleviateing complete machine weight.

Description

Fume exhaust fan

Technical Field

The utility model relates to a kitchen appliance technical field especially relates to lampblack absorber.

Background

The range hood is a device capable of removing impurities, purifying polluted air and the like. In a common range hood in a kitchen, an internal fan rotates at a high speed to form a negative pressure area in a certain space range above a cooking range, and then indoor oil fume is sucked into the range hood and oil fume is separated. Because it has high backpressure performance to multi-wing centrifugal fan to preceding, it can maintain great amount of wind in the runner pressure interval of broad through the change of rotational speed, can also make the noise keep at lower level simultaneously, therefore the lampblack absorber generally all adopts preceding multi-wing centrifugal fan to at present. However, in order to achieve high-pressure and high-back-pressure performance, the size of the volute of the multi-wing centrifugal fan is large, and further the overall size and weight of the range hood are large.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a small, compact structure, light in weight's of occupation space lampblack absorber.

According to the utility model discloses lampblack absorber, include:

a body;

the cross-flow fan is arranged in the machine body, and the extension direction of the cross-flow fan is along the width direction of the machine body;

the thickness of the machine body at the position of the cross flow fan is the largest.

The utility model discloses lampblack absorber sets up to the biggest through the organism thickness with cross-flow fan department, makes things convenient for cross-flow fan's installation on the one hand, and on the other hand does similar shrink to other positions of organism and handles, is favorable to reducing the complete machine volume for organism cavity space utilization obtains improving, and structural layout is compacter, thereby makes complete machine occupation space reduce, is favorable to alleviateing complete machine weight.

According to the utility model discloses an embodiment, cross-flow fan locates the lower part of organism, the thickness of organism diminishes by lower supreme gradually.

According to the utility model discloses an embodiment, cross-flow fan locates the lower part or the upper portion of organism, the organism is unanimous by lower supreme thickness.

According to the utility model discloses an embodiment, cross-flow fan locates the upper portion of organism, the thickness of organism diminishes from top to bottom gradually.

According to an embodiment of the present invention, the upper portion of the body forms a body air outlet, and the lower portion of the body forms a body air inlet, the body air outlet being disposed obliquely upward.

According to the utility model discloses an embodiment, organism air intake sets up to one side downwards.

According to the utility model discloses an embodiment, the central line of organism air outlet and vertical direction become the angle setting, the angle is greater than 15.

According to the utility model discloses an embodiment, the central line of organism air intake and vertical direction angulation setting, the angle is not less than 20 and be not more than 70.

According to the utility model discloses an embodiment, the organism air intake with the extending direction of organism air outlet all follows the width direction of organism.

According to the utility model discloses an embodiment, the organism includes backplate and the cover body, the cover body has opening and cavity, the backplate lid is located the opening, the cover body include with relative front bezel that sets up of backplate and locating side wall board between front bezel and the backplate.

According to the utility model discloses an embodiment, the organism air outlet is seted up in the front bezel.

According to an embodiment of the present invention, the front plate includes a flat plate and a curved plate disposed below the flat plate, the flat plate is inclined from top to bottom in a direction away from the back plate, one end of the curved plate is connected to the lower edge of the flat plate, and the other end of the curved plate is connected to the lower edge of the back plate; the machine body air outlet is formed on the plane plate, and the machine body air inlet is formed on the curved plate.

According to an embodiment of the present invention, the front plate includes a planar plate and a curved plate disposed above the planar plate, the planar plate is inclined from bottom to top in a direction away from the back plate, one end of the curved plate is connected to an upper edge of the planar plate, and the other end of the curved plate is connected to an upper edge of the back plate; the machine body air outlet is formed on the curved plate, and the machine body air inlet is formed on the plane plate.

According to the utility model discloses an embodiment, the front bezel includes roof, plane board and bottom plate, the roof includes horizontal segment and slope section, the vertical setting of plane board just the upper end of plane board with the lower border of slope section is connected, the bottom plate slope sets up, the lower extreme of plane board with the last border of bottom plate is connected, the lower border of bottom plate with the backplate is connected, the organism air outlet form in the slope section, the organism air intake form in the bottom plate.

According to the utility model discloses an embodiment, the front bezel includes plane board and bottom plate, plane board top-down is towards keeping away from the direction slope of backplate, the bottom plate includes slope section and horizontal segment, the lower extreme of plane board with the last border of slope section is connected, the lower border of slope section with one side of horizontal segment is connected, the opposite side of horizontal segment with the backplate is connected, the organism air outlet form in the plane board, the organism air intake form in the slope section.

According to an embodiment of the present invention, the upper end of the planar plate is connected with the upper end of the back plate to form a tip.

According to the utility model discloses an embodiment, the upper end of plane board with connect through the roof between the upper end of backplate, the roof level sets up.

According to the utility model discloses an embodiment, the organism air intake with organism air outlet department all is equipped with the filter screen.

According to the utility model discloses an embodiment, the organism air intake and/or organism air outlet department still is equipped with air purification spare.

According to the utility model discloses an embodiment, the organism be equipped with can the switching in the apron that opens and shuts of organism air intake.

According to the utility model discloses an embodiment, the organism air intake with be formed with inlet air channel between the air intake of cross-flow fan, cross-flow fan's air outlet with be formed with the air-out passageway between the organism air outlet, the air-out passageway is the flaring form along the air-out direction.

According to the utility model discloses an embodiment, the air-out passageway includes segmental arc and straight section, the segmental arc certainly cross-flow fan's air outlet extends to straight section.

According to the utility model discloses an embodiment, the air-out passageway through the curved section with the organism air outlet is connected, first arcwall face and second arcwall face that the curved section includes, the radius of curvature of first arcwall face is greater than the radius of curvature of second arcwall face.

According to the utility model discloses an embodiment, the air-out passageway with cross-flow fan staggers along the horizontal direction and arranges.

According to the utility model discloses an embodiment, be equipped with the spiral case in the air-out passageway, it is located to go up the spiral case the top of organism air outlet, the one end of going up the spiral case extends to the rear side wall of organism, the other end of going up the spiral case extends to the last border of organism air outlet.

According to the utility model discloses an embodiment, go up the bottom surface of spiral case from its with the one end that the rear side wall of organism is connected to its with the one end tilt up that the lateral wall is connected before the organism.

According to the utility model discloses an embodiment, the backplate is equipped with the installation department be equipped with in the organism under the condition of last spiral case, the installation department for form in the hole of hanging of backplate, hang the dress hole site in go up the spiral case and be in the projection region of backplate or the regional top of projection.

According to the utility model discloses an embodiment, still including being used for the drive crossflow fan pivoted motor, the motor loop through motor support and support saddle install in the back lateral wall of organism.

According to the utility model discloses an embodiment still includes:

and the main volute is arranged in the machine body and positioned above the cross-flow fan, and extends along the axial direction of the cross-flow fan.

According to an embodiment of the present invention, a first volute tongue and a second volute tongue are formed along a circumferential direction of the cross flow fan and at both ends of a bottom surface of the main volute respectively; an outlet of the air inlet channel is formed between the first volute tongue and the inner wall of the machine body, and an inlet of the air outlet channel is formed between the second volute tongue and the inner wall of the machine body.

According to an embodiment of the present invention, the main volute is directed toward one side of the crossflow blower and the interval between the rotation centers of the crossflow blower reaches a minimum at the first volute tongue and the second volute tongue.

According to the utility model discloses an embodiment, main spiral case includes first baffle, second baffle and locates first baffle with third baffle between the second baffle, first baffle with the junction of third baffle forms first snail tongue, the second baffle with the junction of third baffle forms the second snail tongue.

According to the utility model discloses an embodiment, main spiral case is fixed in through the spiral case support the rear side wall of organism.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

the utility model provides a range hood, through set up cross flow fan in the organism, can be big with the help of cross flow fan self amount of wind, small, the light in weight's advantage alleviates the weight and the volume of whole range hood, and set up the organism thickness of cross flow fan department into the biggest, make things convenient for cross flow fan's installation on the one hand, on the other hand does similar shrink to other positions of organism and handles, be favorable to reducing the complete machine volume, make organism cavity space utilization obtain improving, structural configuration is compacter, thereby make complete machine occupation space reduce, be favorable to alleviateing complete machine weight.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an appearance structure of a range hood according to an embodiment of the present invention;

fig. 2 is a schematic view of an external structure of a range hood according to another embodiment of the present invention;

fig. 3 is a schematic view of an external structure of a range hood according to another embodiment of the present invention;

fig. 4 is a schematic view of an outline structure of a range hood according to a fourth embodiment of the present invention;

fig. 5 is a schematic view of an outline structure of a range hood according to a fifth embodiment of the present invention;

FIG. 6 is a left side schematic view of the range hood (without side enclosures) of the embodiment shown in FIG. 1;

FIG. 7 is a schematic perspective view of the range hood (without the hood body) of the embodiment shown in FIG. 1;

FIG. 8 is one of the rear perspective views of the range hood of the embodiment shown in FIG. 1 (with the cover plate in an open state);

fig. 9 is a second front perspective view of the range hood (with the cover plate in an open state) of the embodiment shown in fig. 1;

fig. 10 is a second front perspective view of the range hood (with the cover plate in a closed state) of the embodiment shown in fig. 1;

fig. 11 is a schematic structural diagram of a back plate according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a motor according to an embodiment of the present invention;

FIG. 13 is a schematic structural view of a crossflow blower according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of the relationship between a crossflow blower and a main volute provided by an embodiment of the present invention;

fig. 15 is a schematic view showing the relationship between the position and the angle of the air inlet and the air outlet according to the embodiment of fig. 1.

Reference numerals:

100. a body; 101. an air inlet of the machine body; 102. an air outlet of the machine body; 103. an air inlet channel;

104. an air outlet channel; 105. an arc-shaped section; 106. a straight section; 107. a first arc-shaped surface; 108. a second arcuate surface; 110. a back plate; 111. hanging holes;

112. hanging and buckling; 120. a cover body; 121. a front plate; 122. a flat plate; 123. a curved plate;

124. side coaming plates; 125. installing a flanging; 130. a top plate; 140. a base plate; 200. a cross-flow fan; 300. a main volute; 301. a first volute tongue; 302. a second volute tongue; 310. a first guide plate; 320. a second guide plate; 330. a third guide plate; 340. a volute housing support;

400. an upper volute; 500. opening and closing the cover plate; 600. a motor; 700. a motor bracket; 701. a side plate;

702. a fixing plate; 710. a support base; 720. a motor end cover; 730. a shaft sleeve; 800. and (5) filtering by using a filter screen.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Fig. 1 is a schematic view of an appearance structure of a range hood according to an embodiment of the present invention; FIG. 6 is a left side schematic view of the range hood (without side enclosures) of the embodiment shown in FIG. 1; FIG. 7 is a schematic perspective view of the range hood (without the hood body) of the embodiment shown in FIG. 1; as shown in the figures 1, 6 and 7, the embodiment of the utility model provides a range hood, this range hood includes organism 100 and locates the cross-flow fan 200 in the organism 100.

Specifically, the cross-flow fan 200 is disposed in the machine body 100, and an extending direction of the cross-flow fan 200 is along a width direction of the machine body 100, that is, a length direction of the cross-flow fan 200 is the same as the width direction of the machine body 100, and generally, a length of the cross-flow fan 200 is much larger than a diameter of the cross-flow fan, so that the cross-flow fan is beneficial to reducing the thickness of the machine body 100 and realizing lightness and thinness.

In the present embodiment, the thickness of the body 100 is the largest at the position where the cross flow fan 200 is located, in other words, the chamber space of the body 100 is the largest at the position where the cross flow fan 200 is installed. Due to the arrangement, on one hand, the cross-flow fan 200 is convenient to mount, on the other hand, similar contraction treatment is carried out on other parts of the machine body 100, the size of the whole machine body 100 is reduced, the space utilization rate in a cavity of the machine body 100 is improved, the structural layout is more compact, the occupied space of the whole machine is reduced, and the weight of the whole machine is reduced. The components installed in the casing 100 include the crossflow blower 200, a main volute 300 mentioned below, an upper volute, and the like, and among these components, the volume of the crossflow blower 200 is the largest, so after the position of the crossflow blower 200 in the casing 100 is arranged first, other components are installed in a manner of adapting to the crossflow blower 200, thereby facilitating the reasonable layout of the positions of the components, improving the space utilization rate in the casing 100, and reducing the weight of the whole machine.

The utility model provides an embodiment of multiple organism 100 appearance, as shown in FIG. 1 to FIG. 5, correspond the organism 100 appearance of three kinds of type embodiments:

example one

In this embodiment, the cross-flow fan 200 is disposed at the lower portion of the casing 100, and the thickness of the casing 100 gradually decreases from bottom to top, and as shown in fig. 1, 2 and 4, the casing 100 is formed in a shape with a small top and a large bottom.

Example two

In this embodiment, the cross-flow fan 200 is disposed at the lower portion or the upper portion of the casing 100, and the casing 100 has a uniform thickness from bottom to top, as shown in fig. 3, the casing 100 is substantially square.

EXAMPLE III

In this embodiment, the cross-flow fan 200 is disposed on the upper portion of the body 100, and the thickness of the body 100 gradually decreases from top to bottom, as shown in fig. 5, the body 100 is shaped as a large top and a small bottom.

The back surfaces (the surfaces against the wall) of the housing 100 of the three embodiments are straight surfaces, and the surface with the changed shape is mainly the surface facing the outside (i.e. the surface facing the user).

The present invention is described by taking the body 100 shape of the above three embodiments as an example, but the present invention is not limited to this, and other suitable body 100 shapes can also be adopted.

The whole body 100 can adopt a sheet metal structure, and is durable and convenient to scrub. The components inside the machine body 100 may be made of plastic.

According to an embodiment of the present invention, the upper portion of the machine body 100 forms the machine body air outlet 102, and the lower portion of the machine body 100 forms the machine body air inlet 101, thereby forming a circulation path for air to flow in and out.

In this embodiment, the body air outlet 102 is inclined upward to form an inclined upward air outlet form, and the body air inlet 101 is inclined downward to enable air inlet and air outlet not to interfere with each other, and the direction of the air outlet can be kept away from the user.

According to the utility model discloses an embodiment, organism air outlet 102's central line (being organism air outlet 102's axial) and vertical direction angulation setting, this angle A is greater than 15, and being provided with of this angle does benefit to the air-out direction that guarantees gas and is optimum, can not cause the interference to the user human body.

According to the utility model discloses an embodiment, as shown in fig. 15, the central line of organism air intake 101 (being the axial of organism air intake 101) and vertical direction become the angle setting, and this angle B is not less than 20 and be not more than 70, and the air inlet is convenient for in the setting of this angle, and suction effect is good.

According to the utility model discloses an embodiment, organism air intake 101 and organism air outlet 102's extending direction all follows organism 100's width direction, in order to guarantee air inlet and air-out effect, organism air intake 101 and organism air outlet 102 are as big as possible, in this embodiment, organism air intake 101 and organism air outlet 102's length is unanimous with organism 100's width, organism air intake 101 and organism air outlet 102's width should not too narrow yet, need guarantee suitable width, for example, guarantee at 250 + 450mm, thereby guarantee that organism 100 has sufficient air inlet area and air-out area.

In another embodiment, the projection of the body air inlet 101 and the body air outlet 102 are both rectangular and have the same width, and are arranged in the center with respect to the left and right directions of the whole machine. The air inlet and outlet structure can be in other shapes to meet different appearance requirements.

In one embodiment, the housing 100 includes a back plate 110 and a housing having an opening and a cavity, the back plate 110 covers the opening to form a closed space with the housing. The cover body includes a front panel 121 disposed opposite the back panel 110 and a side gusset 124 disposed between the front panel 121 and the back panel 110. As shown in fig. 7, the cover body includes a front panel 121 and a side enclosing panel 124, the front panel 121 is disposed opposite to the back panel 110, and the side enclosing panel 124 is located between the front panel 121 and the back panel 110.

In order to facilitate air outlet, in the embodiment of the present invention, the body air outlet 102 is opened on the front plate 121, i.e. on the plate body facing to one side of the user.

Specifically, as shown in the machine body 100 shown in fig. 6, the front plate 121 includes a flat plate 122 and a curved plate 123, the flat plate 122 is disposed above the curved plate 123, the machine body air outlet 102 is formed on the flat plate 122, and the machine body air inlet 101 is formed on the curved plate 123, so that the formed machine body air inlet 101 is arc-shaped, and as for occupying the same space, the arc-shaped machine body air inlet 101 has a larger air inlet area, which is more beneficial for oil smoke suction, and the arc-shaped machine body air inlet 101 is integrally concave arc-shaped, which is more beneficial for oil smoke gathering, so that more oil smoke sucked in unit time can be provided, and air in places such as kitchens can be ensured to be cleaner; the plane plate 122 is inclined from top to bottom in a direction away from the back plate 110, that is, the distance between the plane plate 122 and the back plate 110 gradually increases from top to bottom, the cross flow fan 200 is arranged at the maximum distance between the plane plate 122 and the back plate 110, so that the installation of the cross flow fan 200 is facilitated, and the machine body 100 is integrally formed into a drop shape, small in size and compact in structure.

Further, one end of the curved plate 123 is connected to the lower edge of the planar plate 122, and the other end of the curved plate 123 is connected to the lower edge of the back plate 110. The flat plate 122 may be directly connected to the back plate 110, or may be indirectly connected to the back plate 110 through the side enclosing plate 124. For example, as shown in fig. 6, the upper edge of the plane plate 122 extends to the back plate 110, that is, the plane plate 122 and the back plate 110 are enclosed to form an inverted V-shaped structure. In this case, the side wall panel 124 includes left and right side panels, the left edge of the back panel 110 and the left edge of the front panel 121 are connected to the left side panel, respectively, and the right edge of the back panel 110 and the right edge of the front panel 121 are connected to the right side panel, respectively.

For the machine body 100 shown in fig. 1, the curvature radius of the curved plate 123 close to the side of the machine body air inlet 101 is larger than the curvature radius of the curved plate 123 close to the side of the back plate 110, so as to form an arc shape from the front to the back curved plate, which not only makes the whole appearance of the machine body smoother, but also facilitates the good connection of the curved plate 123 and the vertically arranged back plate 110, and in addition, facilitates the guarantee that the machine body air inlet 101 has a large enough area.

As shown in fig. 5, the front plate 121 includes a flat plate 122 and a curved plate 123 disposed above the flat plate 122, the flat plate 122 is inclined from bottom to top in a direction away from the back plate 110, one end of the curved plate 123 is connected to an upper edge of the flat plate 122, and the other end of the curved plate 123 is connected to an upper edge of the back plate 110; the machine body air outlet 102 is formed on the curved plate 123, and the formed machine body air outlet 102 is arc-shaped, so that the air outlet area of the arc-shaped machine body air outlet 102 is larger for occupying the same space, and the oil smoke is more favorably discharged, so that the air in places such as a kitchen and the like is cleaner; the body inlet 101 is formed on the plane plate 122, and the plane plate 122 has an inclination angle required to ensure that the body inlet 101 inclines and inclines downward, and the specific inclination angle is not less than 20 ° and not more than 70 ° with reference to the angle B.

For the machine body 100 shown in fig. 5, the curvature radius of the curved plate 123 close to the side of the machine body air outlet 102 is larger than the curvature radius of the curved plate 123 close to the side of the back plate 110, so as to form an arc shape from the front to the back curved plate, which not only makes the whole appearance of the machine body smoother, but also facilitates the good connection of the curved plate 123 and the vertically arranged back plate 110, and in addition, facilitates the guarantee that the machine body air outlet 102 has a large enough area.

As shown in fig. 6, the air outlet channel 104 and the cross flow fan 200 are arranged in a staggered manner in the horizontal direction, and as can be seen from fig. 6, the cross flow fan 200 and the air outlet channel 104 are staggered within the cavity of the machine body 100, so as to maximally reduce the space of the machine body 100, and achieve the light and thin product.

Of course, it is understood that the air outlet channel 104 and the cross flow fan 200 may partially overlap in the vertical direction to reduce the height of the machine body 100.

Specifically, as shown in fig. 2, in the machine body 100, the front plate 121 includes a top plate 130, a plane plate 122 and a bottom plate 140, the top plate 130 includes a horizontal section and an inclined section, the plane plate 122 is vertically disposed, an upper end of the plane plate 122 is connected to a lower edge of the inclined section, and the plane plate 122 is disposed such that the space in the machine body 100 is uniform at the position where the plane plate 122 is disposed in the machine body 100, and thus, the cross-flow fan 200 can be selectively disposed at the upper portion or the lower portion of the machine body 100 as needed. For example, the cross-flow fan 200 may be selectively disposed on the upper portion of the machine body 100, so that the cross-flow fan 200 may be away from the fire source, which is beneficial to ensuring the safety of the cross-flow fan 200, and of course, for the convenience of installation, the cross-flow fan 200 may be disposed on the lower portion of the machine body 100, as long as the distance from the fire source to the machine body 100 is raised appropriately. In this embodiment, the bottom plate 140 is disposed in an inclined manner, the lower end of the plane plate 122 is connected to the upper edge of the bottom plate 140, the lower edge of the bottom plate 140 is connected to the back plate 110, the body air outlet 102 is formed in an inclined section, the body air inlet 101 is formed in the bottom plate 140, and the inclination angles of the bottom plate 140 and the inclined section can be set according to the angles of the body air inlet 101 and the body air outlet 102.

Specifically, as shown in fig. 4, in the casing 100, the front plate 121 includes a plane plate 122 and a bottom plate 140, the plane plate 122 is inclined from top to bottom in a direction away from the back plate 110, and the cross flow fan 200 is disposed in the casing 100 near the lower end of the plane plate 122, where the space is largest, so as to facilitate the installation of the cross flow fan 200; bottom plate 140 includes slope section and horizontal segment, the lower extreme of plane board 122 is connected with the last border of slope section, the lower border of slope section is connected with one side of horizontal segment, the opposite side and the backplate 110 of horizontal segment are connected, organism air outlet 102 is formed in plane board 122, organism air intake 101 is formed in the slope section, the position department that plane board 122 formed organism air outlet 102 can adapt to the inclination of organism air outlet 102 and do certain processing of bending, concrete angle of bending can set up according to concrete needs, the same reason, the inclination of the slope section of bottom plate 140 sets up according to the angle of organism air intake 101.

According to an embodiment of the present invention, as shown in fig. 1, the upper end of the plane plate 122 is directly connected to the upper end of the back plate 110 to form a pointed end, which is similar to an inverted V-shape, and the body 100 shown in fig. 1 is similar to a drop shape, and has an attractive appearance, a small size, and a convenient installation.

According to the utility model discloses an embodiment, as shown in fig. 2, be connected through roof 130 between the upper end of plane board 122 and the upper end of backplate 110, roof 130 level sets up, forms to lack the water droplet form at most advanced, through forming the unfilled corner at the top of water droplet form organism 100, is favorable to reducing the overall height of organism 100, is applicable to and installs in the limited occasion in space, and for example suitable kitchen area is not big, the shorter occasion of floor height.

For convenience of explanation, the present embodiment will be described by taking the body 100 as a drop-shaped structure shown in fig. 1 as an example.

According to the utility model discloses an embodiment, the filter screen is all installed in organism air intake 101 and organism air outlet 102 department, plays the effect of protection on the one hand, and on the other hand is favorable to filtering oil smoke etc. does not do specific limit to the concrete form this embodiment of filter screen. Of course, to facilitate later cleaning and maintenance of crossflow blower 200, filter screen 800 is removably attached to body 100. For example, as shown in fig. 1, edges of the body inlet 101 and the body outlet 102 are bent toward the inside of the body 100 to form a mounting flange 125, and the filter screen 800 is detachably mounted to the mounting flange 125.

According to an embodiment of the present invention, the body air inlet 101 and/or the body air outlet 102 are further provided with an air purifying member, that is, the air purifying member (not shown in the figure) can be disposed at the body air inlet 101, the air purifying member can be disposed at the body air outlet 102, and the air purifying member can be disposed at the body air inlet 101 and the body air outlet 102. In order to save cost, the air purifying element such as activated carbon cotton is installed at the air outlet 102 of the body to further separate and filter the oil smoke. The air purifying member may be a plate-shaped structure, for example, the air purifying member is a plate-shaped activated carbon cotton. The arrangement of the air purification piece is beneficial to discharging the filtered oil smoke into a room to form air flow internal circulation, so that holes are formed in the wall, a long smoke discharge pipe needs to be arranged, and cost and time are saved; compared with an external circulation range hood mode, the internal circulation range hood is very convenient to install and dismantle.

It should be noted that, in order to facilitate replacement of the air purifying member, the air purifying member may also be directly installed at the body air inlet 101 and/or the body air outlet 102. For the machine body air outlet 102, the air purifying element may be installed at the machine body air outlet 102 on a side, i.e. an inner side, of the filter screen 800 facing the air outlet channel 104; for the machine body 100 machine air opening, the air purifying member can be installed at one side, i.e. the outer side, of the filter screen 800 facing away from the air intake channel 103.

In the embodiment of the present invention, an organism air outlet 102 is formed at the upper part of the organism 100, and an organism air inlet 101 is formed at the lower part of the organism 100, so as to form a form of lower air inlet and upper air outlet; an air inlet channel 103 and an air outlet channel 104 are formed in the machine body 100, the air inlet channel 103 extends from an air inlet 101 of the machine body to an air inlet of the cross flow fan 200, that is, the air inlet 101 of the machine body is communicated with the air inlet of the cross flow fan 200 through the air inlet channel 103; the air outlet channel 104 extends from the air outlet of the cross flow fan 200 to the machine body air outlet 102, that is, the air outlet of the cross flow fan 200 is communicated with the machine body air outlet 102 through the air outlet channel 104, and the air inlet channel 103 is in smooth transition connection with the air outlet channel 104, so that the air flow is smooth and smooth. In general, the "upper portion" and the "lower portion" in the above description are based on the installation state of the range hood.

In this embodiment, the air inlet channel 103 and the air outlet channel 104 form a channel for oil smoke to flow through, and it is necessary to ensure that the channel has fewer corners to prevent performance degradation caused by excessive local loss of an impeller of the cross flow fan.

Compared with a forward multi-wing centrifugal fan, the cross-flow fan 200 has larger air volume and smaller volume and weight under the same noise volume, so that the range hood can reduce the weight and volume of the whole range hood by adopting the cross-flow fan 200 to replace the multi-wing centrifugal fan.

It should be noted that, in the range hood in this embodiment, as shown in fig. 6 to 9, the body air outlet 102 is formed at the upper portion of the front side wall of the body 100, the body air inlet 101 is formed at the lower portion of the front side wall of the body 100, and the cross flow fan 200 is disposed adjacent to the body air inlet 101, but it can be understood that a certain safety distance is kept between the cross flow fan 200 and the body air inlet 101, so as to prevent the fire source of the cooking bench from affecting the cross flow fan 200.

In one embodiment, the main volute 300 is disposed above the crossflow blower 200, and the main volute 300 is fixed to the rear sidewall of the casing 100 by the volute bracket 340, so that there are no screws on the side surface and no observable screw structure during the assembly of the whole machine, and the appearance of the whole machine is smooth and beautiful. The main volute 300 extends along the axial direction of the cross flow fan 200, so that the air inlet passage 103 and the air outlet passage 104 are formed inside the body 100. In the above description, "upper portion", and "lower portion" are based on the installation state of the range hood, and "front side wall" generally refers to a side of the body 100 facing a user, and "rear side wall" generally refers to a side of the body 100 facing away from the user. The main volute 300 and the volute bracket 340 may be detachably connected by a connector such as a bolt, or may be integrally formed. The main volute 300 may be, but not limited to, a single volute tongue structure or a double volute tongue structure. The main volute 300 is described as having a double volute tongue structure.

In this embodiment, a first volute tongue 301 and a second volute tongue 302 are respectively formed at two ends of the bottom surface of the main volute 300 along the circumferential direction of the crossflow blower 200, an outlet of the air inlet channel 103 is formed between the first volute tongue 301 and the inner wall of the casing 100, and an inlet of the air outlet channel 104 is formed between the second volute tongue 302 and the inner wall of the casing 100. After the cross-flow fan 200 is started, a negative pressure area is formed near the air inlet 101 of the machine body, oil smoke generated by cooking is quickly sucked into the air inlet channel 103 under the driving of pressure difference, and the oil smoke in the air inlet channel 103 is discharged from the air outlet 102 of the machine body along the air outlet channel 104 under the driving of the cross-flow fan 200, so that the efficiency of the fan is improved conveniently, and the oil smoke purification is accelerated.

Taking the double-volute structure as an example, as shown in fig. 6, the main volute 300 includes a first guide plate 310, a second guide plate 320, and a third guide plate 330, the third guide plate 330 extends in the left-right direction, and the first guide plate 310 and the second guide plate 320 are respectively located at the front and rear sides of the third guide plate 330. That is, the first volute tongue 301 is formed at the junction of the third guide plate 330 and the first guide plate 310, and the second volute tongue 302 is formed at the junction of the third guide plate 330 and the second guide plate 320. The front side wall of the main volute 300, that is, the first guide plate 310, is surrounded with the inner wall of the machine body 100 to form the air inlet channel 103, the air inlet channel 103 extends from the machine body air inlet 101 to the first volute tongue 301, that is, an outlet of the air inlet channel 103 is formed between the first volute tongue 301 and the inner wall of the machine body 100; the rear sidewall of the main volute 300, that is, the second guide plate 320, and the inner wall of the machine body 100 are surrounded to form the air outlet channel 104, and the air outlet channel 104 extends from the second volute tongue 302 to the air outlet of the machine body 100, that is, an inlet of the air outlet channel 104 is formed between the second volute tongue 302 and the inner wall of the machine body 100.

Therefore, after the cross flow fan 200 is started, a negative pressure area is formed near the body air inlet 101, oil smoke generated by cooking is quickly sucked into the air inlet channel 103 under the driving of pressure difference, and the oil smoke in the air inlet channel 103 is discharged from the body air outlet 102 along the air outlet channel 104 under the driving of the cross flow fan 200.

Further, as shown in fig. 14, a distance between a side of the main volute 300 facing the crossflow blower 200 and a rotation center of the crossflow blower 200 reaches a minimum value at the first and second volute tongues 301 and 302, that is, a distance D between the first volute tongue 301 and the rotation center of the crossflow blower 200 is equal to a distance between the second volute tongue 302 and the rotation center of the crossflow blower 200, and a distance between any one point of the main volute 300 between the first and second volute tongues 301 and 302 and the rotation center of the crossflow blower 200 is greater than D.

In this embodiment, the included angle α between the first volute tongue 301 and the second volute tongue 302 and the rotation center of the crossflow blower 200, that is, the included angle α between the rotation center of the crossflow blower 200 and the connecting line between the first volute tongue 301 and the second volute tongue 302, is not less than 30 ° and not more than 160 °. For example, the included angle α ranges from 80 ° to 120 °.

Because the distance D between the first volute tongue 301 and the rotation center of the crossflow blower 200 is equal to the distance between the second volute tongue 302 and the rotation center of the crossflow blower 200, and the distance between any one point of the main volute 300 facing the crossflow blower 200, that is, any point of the third guide plate 330, which is located between the first volute tongue 301 and the second volute tongue 302, and the rotation center of the crossflow blower 200 is greater than D, the backflow generated at the first volute tongue 301 and the second volute tongue 302 is constrained between the first volute tongue 301 and the second volute tongue 302, so that the area of the backflow region can be limited, the occupied area of the backflow region on the air duct can be reduced, the stability of the airflow in the air duct can be improved, the influence of the backflow region on the intake airflow and the exhaust airflow of the crossflow blower 200 can be reduced, and the blower efficiency can be improved.

It should be noted that, although the distance between the rotational center of the crossflow blower 200 and the main scroll 300 reaches a minimum value at the first and second scroll tongues 301 and 302, the distance between each point of the third guide plate 330 between the first and second scroll tongues 301 and 302 and the rotational center of the crossflow blower 200 may be different or the same.

Considering that when the body air outlet 102 is formed on the front side wall of the body 100, the area above the body air outlet 102 in the body 100, that is, the airflow at the top of the body 100, cannot be discharged in time, and the airflow is prone to generate a vortex in the area, thereby generating noise, so as to avoid the above phenomenon, and further ensure that the airflow in the air outlet channel 104 is completely and smoothly discharged from the body air outlet 102, as shown in fig. 6 and 7, the range hood further includes an upper volute 400, the upper volute 400 is arranged in the air outlet channel 104 and is located above the body air outlet 102, one end of the upper volute 400 extends to the rear side wall of the body 100, and the other end of the upper volute 400 extends to the upper edge of the body air outlet 102.

Therefore, in the process that the flue gas discharged from the cross-flow fan 200 flows upwards along the air outlet channel 104, the flue gas is blocked by the upper volute 400 and then flows to the machine body air outlet 102 along the bottom surface of the upper volute 400. In order to better guide the airflow to turn to the body outlet 102, the bottom surface of the upper volute 400 is inclined upward from the end connected to the rear sidewall of the body 100 to the end connected to the front sidewall of the body 100. In addition, in order to reduce flow resistance, the bottom surface of the upper scroll 400 is a smooth curved surface. For example, as shown in fig. 6, the bottom surface of the upper scroll 400 is a curved surface that is upwardly convex.

Of course, the bottom surface of the upper volute 400 may also be composed of multiple planes, for example, the bottom surface of the upper volute 400 includes a first plane and a second plane, one end of the first plane extends to the rear sidewall of the machine body 100, the other end of the first plane extends to one end of the second plane, the other end of the second plane extends to the upper edge of the machine body air outlet 102, and an included angle between the first plane and the second plane is an obtuse angle, for example, not less than 120 °.

In addition, be provided with the installation department on backplate 110, through the opening with the cover body user dorsad when this lampblack absorber of installation, alright fix the lampblack absorber on the wall with the help of the installation department on backplate 110. Because the cover body covers on backplate 110, and backplate 110 is towards the wall, therefore the user can only see the outer wall of the cover body, that is to say, this lampblack absorber installs and exposes the only cover body before the user face behind the wall, and the user can't see backplate 110's installation department, also can't see the connecting piece between backplate 110 and the cover body to not only improved the aesthetic property of complete machine outward appearance, but also can avoid hiding dirty and holding.

The mounting portion may be a mounting hole 111 or a screw hole formed in the back plate 110, or may be a screw or a hook mounted to the back plate 110. Taking the mounting portion as the hanging hole 111 as an example, an installer may fix the hook on the wall first, and then hang the whole body of the machine body 100 on the hook, that is, make the free end of the hook penetrate through the hanging hole 111 and extend into the machine body 100 and hook on the back plate 110. In consideration of the convenience of hanging, the size of the hanging hole 111 is generally larger than that of the hook, that is, there is a gap between the hook and the hanging hole 111, so in order to ensure the sealing of the air outlet channel 104 and prevent the air flow in the air outlet channel 104 from leaking through the gap, when the upper volute 400 is disposed in the machine body 100, the hanging hole 111 is located above the projection area or the projection area of the upper volute 400 on the back plate 110, that is, the free end of the hook passes through the hanging hole 111 and extends into the machine body 100 and then is located above the bottom surface of the upper volute 400, and the air flow in the air outlet channel 104 is blocked by the upper volute 400 and cannot flow into the area above the upper volute 400. In addition, the arrangement can avoid the air flow in the air outlet channel 104 from leaking, and can also avoid the hook extending into the machine body 100 from influencing the flow of the air flow in the air outlet channel 104.

In addition, the cover and the back plate 110 may be fixedly connected by welding, bonding, or the like, or may be detachably connected. For example, the detachable connection is adopted, the edges of the two sides of the cover body are oppositely bent to form flanges, first installation parts are arranged on the flanges, second installation parts corresponding to the first installation parts one to one are formed on the back plate 110, and the first installation parts and the second installation parts can be connected in a matched mode in a clamping mode, a hanging mode and the like. Taking the hanging as an example, as shown in fig. 8 and 11, the first mounting portion is a hanging hole formed on the flange, the second mounting portion is a hanging buckle 112 formed on the back plate 110, and the hanging buckle 112 is located on one side of the back plate 110 facing the cover body. Of course, the hanging hole can also be formed on the back plate 110, in which case the hanging buckle 112 is formed on the flange.

In addition, the cover body and the back plate 110 can also be connected through a bolt, specifically, a first through hole is formed in a flanging of the cover body, and second through holes corresponding to the first through holes in a one-to-one manner are formed in the back plate 110. When the machine body 100 is assembled, the thread section of the bolt penetrates out of the corresponding first through hole from inside to outside, then the back plate 110 is covered at the opening of the cover body, and the thread section of the bolt penetrates out of the corresponding second through hole; and finally screwing a nut on the thread section of the bolt. Of course, the cover and the back plate 110 may be connected in various connection manners, for example, as shown in fig. 8, the upper end and the lower end of the back plate 110 are connected with the back plate 110 through bolts, and the left end and the right end of the back plate 110 are connected with the back plate 110 in a hanging manner.

In addition, in order to improve the strength of the back plate 110, a reinforcing rib or a reinforcing boss may be stamped and formed at the joint of the back plate 110 and the cover body. The material of the cover and the back plate 110 may be, but not limited to, plastic or stainless steel. The cover body can be formed by integral injection molding, can also be formed by bending a plate, and can also be formed by welding or bonding a plurality of plates.

As shown in fig. 1 and 6, the curved plate 123 extends along an archimedean spiral from the lower edge of the back plate 110 to the lower edge of the flat plate 122, that is, the left or right view of the curved plate 123 is a curve that is a part of the archimedean spiral based on the orientation shown in fig. 1. In order to improve the aesthetic appearance and prevent the body 100 from scratching the user, the curved plate 123 and the flat plate 122 are smoothly transited. As a result, as shown in fig. 6, the entire body 100 is in the form of a droplet. The advantages of such an arrangement are: on one hand, the characteristics of large lower space and small upper space of the drop-shaped structure can be utilized, so that the installation of the cross-flow fan 200 in the machine body 100 can be ensured, the waste of the space in the machine body 100 can be avoided, and the interior of the machine body 100 is more compact; on the other hand, the appearance can be improved, and the occupied space of the machine body 100 can be reduced.

In addition, the range hood further includes a motor 600 for driving the cross flow fan 200 to rotate. Specifically, as shown in FIG. 7, motor 600 may be coupled to crossflow blower 200 directly or via a transmission to crossflow blower 200. Taking the direct connection between the motor 600 and the crossflow blower 200 as an example, the motor 600 is mounted to the back plate 110 sequentially through the motor bracket 700 and the bracket holder 710. Referring to fig. 12 and 13, the motor bracket 700 includes two side plates 701 disposed opposite to each other and a fixing plate 702 disposed between the two side plates 701, the fixing plate 702 of the motor bracket 700 is fixed to the bracket holder 710 by bolts, the motor 600 is disposed between the two side plates 701 of the motor bracket 700, a motor end cover 720 is installed on one side of the side plate 701 facing away from the motor 600, a shaft sleeve 730 is installed on the side plate 701 of the motor bracket 700 adjacent to the crossflow blower 200, and a rotating shaft of the crossflow blower 200 passes through the shaft sleeve 730 to be connected to an output shaft of the motor 600. Because the motor 600 is mounted on the back plate 110 through the motor bracket 700 and the bracket holder 710, no screws are arranged on the side surface in the whole machine assembly, and no observable screw structure is arranged, so that the whole machine is smooth and attractive in appearance, and the grade of the product is improved.

It should be noted that the motor bracket 700 and the bracket holder 710 may be detachably connected by a connector such as a bolt, or may be integrally formed. On the contrary, if the motor 600 is indirectly connected to the crossflow blower 200, the transmission mechanism may be, but is not limited to, a belt pulley mechanism or a gear chain mechanism. Taking the belt pulley mechanism as an example, the belt pulley mechanism comprises a driving wheel, a driven wheel and a belt, the driving wheel is fixed on the output shaft of the motor 600, the driven wheel is fixed on the rotating shaft of the cross-flow fan 200, and the driving wheel is in transmission connection with the driven wheel through the belt. Therefore, after the motor 600 is started, the driving wheel synchronously rotates along with the motor, and the driving wheel can rotate through the belt and the driven wheel, so that the cross-flow fan 200 fixedly connected with the driven wheel is driven to rotate. Since the gear chain mechanism is mounted in a similar manner to the belt pulley mechanism, it will not be described in detail here. Although the aerodynamic performance of crossflow blower 200 may be improved by motor 600 being indirectly coupled to crossflow blower 200 via a transmission, the risk of overall vibration may also be increased, as compared to the case where motor 600 is directly coupled to crossflow blower 200. Therefore, in the actual production process, a designer can select the connection mode of the motor 600 according to the emphasis point of the actual requirement of a user.

It should be noted that the range hood in this embodiment may have only one cross flow fan 200, or may have a plurality of cross flow fans 200. When the range hood includes the plurality of cross flow fans 200, the plurality of cross flow fans 200 are sequentially disposed along the extending direction of the main scroll 300. For example, when the range hood includes two cross flow fans 200 with reference to the orientation shown in fig. 7, the motor includes a dual-shaft motor, the two cross flow fans 200 are respectively disposed on the left and right sides of the dual-shaft motor, one output shaft of the dual-shaft motor is connected to the rotating shaft of one of the cross flow fans 200, and the other output shaft of the dual-shaft motor is connected to the rotating shaft of the remaining one of the cross flow fans 200.

As shown in fig. 8 to 10, the body 100 further includes an opening/closing cover 500 that can be opened/closed at the body inlet 101 and/or the body outlet 102. The opening and closing cover plate 500 can be opened and closed electrically or manually, when the opening and closing are performed electrically, a driving part needs to be added, the specific form of the driving part can be a form of a gear which is driven by a motor and meshed with the gear, the opening and closing cover plate 500 is controlled to rotate to open and close, the sliding opening and closing form can be adopted, and the embodiment is not limited specifically. By controlling the opening degree of the opening and closing cover plate 500, the negative pressure at the air inlet 101 of the machine body can be controlled, so that the whole machine can be suitable for kitchen cooking scenes.

Taking the air inlet 101 of the machine body as an example, the opening and closing cover plate 500 may be rotatably connected to the machine body 100, or may be slidably disposed on the machine body 100. When the open-close cover plate 500 is rotatably connected to the body 100, one end of the open-close cover plate 500 may be rotatably fixed to the body 100 through a rotation shaft, and thus the size of the body inlet 101 may be adjusted by rotating the other end of the open-close cover plate 500. Similarly, when the opening/closing cover plate 500 is slidably connected to the body 100, one of the opening/closing cover plate 500 and the body 100 may have a sliding slot, and the other may have a sliding block slidably inserted into the sliding slot, so that the size of the body air inlet 101 can be adjusted by pushing the opening/closing cover plate 500. It can be seen that, in the embodiment, the opening and closing cover plate 500 is arranged at the body air inlet 101, so that the size of the body air inlet 101 can be adjusted, the air inlet volume can be changed, the body air inlet 101 can be closed when the cross-flow fan 200 stops, ash falling is reduced, and meanwhile, the attractiveness is improved.

The installation manner of the opening and closing cover plate 500 at the air outlet 102 of the machine body is similar to that described above, and the description thereof is omitted.

It should be noted that, for the body inlet 101, as shown in fig. 9, when the open-close cover 500 is rotatably connected to the body 100, the open-close cover 500 is rotatably connected to the upper edge of the body inlet 101. The advantages of such an arrangement are: on one hand, after the body air inlet 101 is opened by the opening and closing cover plate 500, the oil smoke enters the body air inlet 101 from the lower part of the opening and closing cover plate 500, so that the oil smoke is prevented from being shielded by the opening and closing cover plate 500 and cannot rapidly enter the body 100 through the body air inlet 101; on the other hand, due to the existence of the opening and closing cover plate 500, when the oil smoke generated in the cooking process rises to the opening and closing cover plate 500, the oil smoke is blocked by the opening and closing cover plate 500 and then rapidly enters the corresponding machine body air inlet 101 along the opening and closing cover plate 500. In addition, in order to achieve the effect of gathering the cigarette, the lower portion of the opening and closing cover plate 500 may be bent downward, that is, the opening and closing cover plate 500 is substantially L-shaped.

In addition, in order to be able to automatically adjust the size of the body air inlet 101 and/or the body air outlet 102 according to the air volume of the cross flow fan 200, i.e. the gear of the motor, the range hood further comprises a driving part corresponding to the opening and closing cover plate 500, the driving part is installed on the body 100 and linked with the motor, and the driving part can control the opening and closing of the opening and closing cover plate 500 according to the gear of the motor.

Taking the machine body air inlet 101 as an example, when the opening and closing cover plate 500 at the machine body air inlet 101 is rotatably connected with the machine body 100, the driving member may be a driving motor connected with a rotating shaft of the opening and closing cover plate 500, and the driving motor is linked with the motor; when the opening and closing cover plate 500 at the body air inlet 101 is slidably connected to the body 100, the driving member may be, but is not limited to, a micro cylinder or a screw mechanism. If the driving member is a micro cylinder, a cylinder body of the micro cylinder is fixed to the machine body 100, and a piston rod of the micro cylinder extends along the height direction of the machine body air inlet 101 and is connected with the opening and closing cover plate 500, so that the opening and closing cover plate 500 can be driven to slide relative to the machine body 100 when the piston rod moves relative to the cylinder body, and the corresponding machine body air inlet 101 can be opened or closed. If the driving member is a screw mechanism, a sliding slot may be formed in the body 100, and a sliding block may be fixed on the opening/closing cover plate 500, and the sliding block may be slidably embedded in the sliding slot, and meanwhile, the screw may be rotatably mounted on the body 100 and parallel to the sliding slot, and the sliding block is formed with a threaded through hole in threaded engagement with the screw, so that the sliding block may move along the screw when the screw is driven by the screw motor to rotate, and further, the opening/closing cover plate 500 fixed thereto may be driven to slide relative to the body 100.

In this embodiment, the air outlet channel 104 is gradually enlarged along the air outlet direction, that is, the flow area of the air outlet channel 104 gradually increases from the air outlet of the cross flow fan 200 to the body air outlet 102. Therefore, the air outlet resistance of the cross flow fan 200 can be reduced, and the back pressure resistance can be improved.

With the orientation shown in fig. 7 as a reference, the blades of the cross flow fan 200 extend in the left-right direction, that is, in the width direction of the body 100, the air inlet channel 103 is located in front of the cross flow fan 200, the air outlet channel 104 is located behind the cross flow fan 200, the air outlet channel 104 includes an arc-shaped section 105 and a straight section 106 that are communicated with each other, and the arc-shaped section 105 extends from the air outlet of the cross flow fan 200 to the straight section 106. Wherein the radius of curvature of the end of the arcuate segment 105 remote from the straight segment 106 is adapted to the shape of the crossflow blower 200.

In this embodiment, air outlet channel 104 is connected with organism air outlet 102 through curved section, first arcwall face 107 and second arcwall face 108 that this curved section includes, wherein, the curvature radius of first arcwall face 107 is greater than the curvature radius of second arcwall face 108, in other words, the camber of first arcwall face 107 of this embodiment is greater than the camber of second arcwall face 108, the benefit of design like this lies in that when the air current flows through curved section, most air current mainly concentrates on first arcwall face 107 department, set up the curvature radius of first arcwall face 107 bigger, be favorable to the air current to pass through smoothly, the resistance that the air current passes through is littleer, airflow mobility is better.

Of course, the air outlet channel 104 may also be formed by only a plurality of arc-shaped segments 105, that is, the straight segment 106 may also be replaced by an arc-shaped segment.

In the embodiment, the cross-flow fan 200 is used as an airflow driving part, so that the whole machine is small in size, larger in air quantity under the same noise volume, small in weight and convenient to install. In addition, the cross-flow fan 200 is used as an airflow driving part of the range hood, so that the performance of the whole range hood is more suitable for the requirements of users, the high back pressure working capacity which is not needed by the users is reduced, and the advantages of high flow, low noise, low weight, small volume and attractive appearance are achieved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims (33)

1. A range hood, comprising:

a body;

the cross-flow fan is arranged in the machine body, and the extension direction of the cross-flow fan is along the width direction of the machine body;

the thickness of the machine body at the position of the cross flow fan is the largest.

2. The range hood according to claim 1, wherein the cross flow fan is arranged at a lower portion of the body, and the thickness of the body is gradually reduced from bottom to top.

3. The range hood according to claim 1, wherein the cross flow fan is arranged at the lower part or the upper part of the machine body, and the thickness of the machine body is consistent from bottom to top.

4. The range hood of claim 1, wherein the cross flow fan is arranged at the upper part of the body, and the thickness of the body is gradually reduced from top to bottom.

5. A range hood as claimed in any of claims 1 to 4, wherein an organism outlet is formed at the upper part of the machine body, an organism inlet is formed at the lower part of the machine body, and the organism outlet is arranged obliquely upwards.

6. The range hood according to claim 5, wherein the air inlet of the machine body is obliquely arranged downwards.

7. A range hood as claimed in claim 5, wherein the centre line of the air outlet of the body is angled to the vertical, the angle being greater than 15 °.

8. A range hood as claimed in claim 6, wherein the centerline of the air inlet of the body is disposed at an angle to the vertical, said angle being not less than 20 ° and not more than 70 °.

9. A range hood as claimed in claim 5, wherein the extension directions of the air inlet and the air outlet are along the width direction of the hood.

10. A range hood as claimed in claim 5, wherein the body comprises a back plate and a hood body, the hood body has an opening and a cavity, the back plate covers the opening, and the hood body comprises a front plate opposite to the back plate and a side wall plate arranged between the front plate and the back plate.

11. The range hood of claim 10, wherein the body air outlet is open to the front plate.

12. A range hood as claimed in claim 10, wherein the front plate comprises a flat plate and a curved plate disposed below the flat plate, the flat plate is inclined from top to bottom in a direction away from the back plate, one end of the curved plate is connected to the lower edge of the flat plate, and the other end of the curved plate is connected to the lower edge of the back plate; the machine body air outlet is formed on the plane plate, and the machine body air inlet is formed on the curved plate.

13. A range hood as claimed in claim 10, wherein the front plate comprises a flat plate and a curved plate disposed above the flat plate, the flat plate is inclined from bottom to top in a direction away from the back plate, one end of the curved plate is connected with the upper edge of the flat plate, and the other end of the curved plate is connected with the upper edge of the back plate; the machine body air outlet is formed on the curved plate, and the machine body air inlet is formed on the plane plate.

14. A range hood as claimed in claim 10, wherein the front plate includes a top plate, a flat plate and a bottom plate, the top plate includes a horizontal section and an inclined section, the flat plate is vertically disposed and the upper end of the flat plate is connected with the lower edge of the inclined section, the bottom plate is obliquely disposed, the lower end of the flat plate is connected with the upper edge of the bottom plate, the lower edge of the bottom plate is connected with the back plate, the body air outlet is formed in the inclined section, and the body air inlet is formed in the bottom plate.

15. A range hood as claimed in claim 10, wherein the front plate includes a plane plate and a bottom plate, the plane plate is inclined from top to bottom in a direction away from the back plate, the bottom plate includes an inclined section and a horizontal section, the lower end of the plane plate is connected with the upper edge of the inclined section, the lower edge of the inclined section is connected with one side of the horizontal section, the other side of the horizontal section is connected with the back plate, the body air outlet is formed on the plane plate, and the body air inlet is formed on the inclined section.

16. A range hood as set forth in claim 12 wherein the upper end of said planar plate is connected to the upper end of said back plate to form a pointed end.

17. A range hood as claimed in claim 12, wherein the upper end of the planar plate is connected to the upper end of the back plate by a top plate, and the top plate is horizontally disposed.

18. The range hood of claim 5, wherein filter screens are arranged at both the air inlet of the machine body and the air outlet of the machine body.

19. A range hood as claimed in claim 18, wherein an air cleaning member is further provided at the air inlet of the body and/or the air outlet of the body.

20. A range hood as claimed in claim 5, wherein the body is provided with an openable cover plate which can be opened and closed at the air inlet of the body.

21. The range hood according to claim 5, wherein an air inlet channel is formed between the air inlet of the body and the air inlet of the cross flow fan, an air outlet channel is formed between the air outlet of the cross flow fan and the air outlet of the body, and the air outlet channel is gradually expanded along an air outlet direction.

22. The range hood of claim 21, wherein the air outlet channel comprises an arc-shaped section and a straight section, and the arc-shaped section extends from the air outlet of the cross flow fan to the straight section.

23. A range hood as claimed in claim 22, wherein the air outlet channel is connected to the air outlet of the body via a curved section, the curved section includes a first curved surface and a second curved surface, and a radius of curvature of the first curved surface is greater than a radius of curvature of the second curved surface.

24. A range hood as set forth in claim 21, wherein said air outlet passage is arranged to be horizontally staggered from said cross flow fan.

25. A range hood as claimed in claim 21, wherein an upper volute is disposed in the air outlet channel, the upper volute is located above the air outlet of the machine body, one end of the upper volute extends to the rear side wall of the machine body, and the other end of the upper volute extends to the upper edge of the air outlet of the machine body.

26. A range hood as claimed in claim 25, wherein the bottom surface of the upper volute is inclined upward from the end thereof connected to the rear side wall of the body to the end thereof connected to the front side wall of the body.

27. A range hood as claimed in claim 10, wherein the back plate is provided with an installation part, the installation part is formed in a hanging hole of the back plate under the condition that the machine body is internally provided with an upper volute, and the hanging hole is located in the projection area of the back plate or above the projection area.

28. A range hood as claimed in any of claims 1 to 4, further comprising a motor for driving the cross flow fan to rotate, wherein the motor is installed on the rear side wall of the body through a motor bracket and a bracket base in sequence.

29. A range hood as set forth in claim 21, further comprising:

and the main volute is arranged in the machine body and positioned above the cross-flow fan, and extends along the axial direction of the cross-flow fan.

30. The range hood of claim 29, wherein a first volute tongue and a second volute tongue are formed at both ends of the bottom surface of the main volute along the circumferential direction of the crossflow blower; an outlet of the air inlet channel is formed between the first volute tongue and the inner wall of the machine body, and an inlet of the air outlet channel is formed between the second volute tongue and the inner wall of the machine body.

31. A range hood as set forth in claim 30, wherein a distance between a side of the main volute directed toward the crossflow blower and a center of rotation of the crossflow blower reaches a minimum at the first and second volute tongues.

32. A range hood as set forth in claim 30 wherein said main volute includes a first guide plate, a second guide plate and a third guide plate disposed between said first guide plate and said second guide plate, wherein a junction of said first guide plate and said third guide plate forms said first volute tongue, and wherein a junction of said second guide plate and said third guide plate forms said second volute tongue.

33. A range hood as claimed in claim 29, wherein the main volute is fixed to a rear sidewall of the housing by a volute bracket.

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