WO2022206483A1

WO2022206483A1 - Range hood

Info

Publication number: WO2022206483A1
Application number: PCT/CN2022/082240
Authority: WO
Inventors: 李佳阳; 蒋济武
Original assignee: 芜湖美的厨卫电器制造有限公司
Priority date: 2021-04-01
Filing date: 2022-03-22
Publication date: 2022-10-06
Also published as: CN115164244A

Abstract

The present application relates to the technical field of kitchen appliances, and provided is a range hood. The range hood comprises: a machine body and a cross-flow fan arranged in the machine body, wherein an extension direction of the cross-flow fan is in the width direction of the machine body, and the machine body has the greatest thickness at the location where the cross-flow fan is located. By means of the present application, the volume of the whole machine is reduced, resulting in an improved space utilization rate in a cavity of the machine body, and a more compact structural layout, so that the space occupied by the whole machine is reduced to facilitate the reduction of the weight of the whole machine.

Description

range hood

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese Patent Application No. 2021103576075, filed on April 1, 2021, with the patent name of "Range Hood", the entire contents of the above application are fully incorporated into this application by reference.

technical field

The present application relates to the technical field of kitchen appliances, in particular to range hoods.

Background technique

A range hood is a device that can remove impurities and purify the polluted air. In the range hood commonly used in the kitchen, the internal fan rotates at high speed to form a negative pressure area in a certain space above the stove, and then the indoor range hood is sucked into the range hood and the range hood is separated. Due to the high back pressure performance of the forward multi-blade centrifugal fan, it can maintain a large air volume in a wide flow channel pressure range through the change of rotation speed, and at the same time can keep the noise at a low level, so the current range hood generally Forward multi-blade centrifugal fans will be used. However, in order to achieve high pressure and high back pressure performance, the size of the volute of the multi-blade centrifugal fan is relatively large, which in turn leads to a large volume and weight of the range hood.

SUMMARY OF THE INVENTION

The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a range hood with a small footprint, compact structure and light weight.

The range hood according to the embodiment of the present application includes:

body;

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

The thickness of the body at the location where the cross-flow fan is located is the largest.

In the range hood of the embodiment of the present application, by setting the thickness of the body at the cross-flow fan to the maximum, on the one hand, the installation of the cross-flow fan is convenient, and on the other hand, similar shrinkage treatment is performed on other parts of the body, which is beneficial to reduce the volume of the whole machine , so that the space utilization rate in the body chamber is improved, and the structure layout is more compact, so that the space occupied by the whole machine is reduced, which is beneficial to reduce the weight of the whole machine.

According to an embodiment of the present application, the cross-flow fan is arranged at the lower part of the body, and the thickness of the body gradually decreases from bottom to top.

According to an embodiment of the present application, the cross-flow fan is arranged at the lower part or the upper part of the body, and the body has a uniform thickness from bottom to top.

According to an embodiment of the present application, the cross-flow fan is arranged on the upper part of the body, and the thickness of the body gradually decreases from top to bottom.

According to an embodiment of the present application, the upper part of the body forms the body air outlet, the lower part of the body forms the body air inlet, and the body air outlet is arranged obliquely upward.

According to an embodiment of the present application, the air inlet of the body is arranged obliquely downward.

According to an embodiment of the present application, the center line of the air outlet of the body is arranged at an angle with the vertical direction, and the angle is greater than 15°.

According to an embodiment of the present application, the center line of the air inlet of the body is arranged at an angle with the vertical direction, and the angle is not less than 20° and not more than 70°.

According to an embodiment of the present application, the extension directions of the air inlet and the air outlet of the body are both along the width direction of the body.

According to an embodiment of the present application, the body includes a back plate and a cover body, the cover body has an opening and a cavity, the back plate covers the opening, and the cover body includes a back plate opposite to the back plate The provided front panel and the side wall panel provided between the front panel and the back panel.

According to an embodiment of the present application, the air outlet of the body is opened on the front panel.

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

According to an embodiment of the present application, the front panel includes a flat panel and a curved panel disposed above the flat panel, the flat panel is inclined from bottom to top in a direction away from the back panel, and the curved panel is One end is connected to the upper edge of the flat panel, and the other end of the curved panel is connected to the upper edge of the back panel; the air outlet of the body is formed on the curved panel, and the air inlet of the body is formed on the flat panel. panel.

According to an embodiment of the present application, the front panel includes a top panel, a flat panel, and a bottom panel, the top panel includes a horizontal section and an inclined section, the flat panel is vertically arranged, and the upper end of the flat panel and the inclined section are The lower edge is connected, the bottom plate is inclined, 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, and the air outlet of the body is formed in the inclined section, The body air inlet is formed on the bottom plate.

According to an embodiment of the present application, the front plate includes a flat 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, and the flat plate The lower end 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, and the air outlet of the body is formed In the plane plate, the air inlet of the body is formed in the inclined section.

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

According to an embodiment of the present application, the upper end of the flat plate and the upper end of the back plate are connected by a top plate, and the top plate is arranged horizontally.

According to an embodiment of the present application, both the air inlet of the body and the air outlet of the body are provided with filter screens.

According to an embodiment of the present application, the air inlet and/or the air outlet of the body is further provided with an air purifying member.

According to an embodiment of the present application, the body is provided with an opening and closing cover plate that can be opened and closed at the air inlet of the body.

According to an embodiment of the present application, an air inlet channel is formed between the air inlet of the body and the air inlet of the cross-flow fan, and an air outlet is formed between the air outlet of the cross-flow fan and the air outlet of the body The air outlet channel is gradually expanded along the air outlet direction.

According to an embodiment of the present application, the air outlet channel includes 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.

According to an embodiment of the present application, the air outlet channel is connected to the air outlet of the body through a curved section, and the curved section includes a first arc-shaped surface and a second arc-shaped surface, and the first arc-shaped surface has a The radius of curvature is greater than the radius of curvature of the second arc-shaped surface.

According to an embodiment of the present application, the air outlet channel and the cross-flow fan are arranged staggered in a horizontal direction.

According to an embodiment of the present application, an upper volute is arranged in the air outlet channel, the upper volute is located above the air outlet of the body, and one end of the upper volute extends to the rear side wall of the body , the other end of the upper volute extends to the upper edge of the air outlet of the body.

According to an embodiment of the present application, the bottom surface of the upper volute is inclined upward from the end connected with the rear side wall of the body to the end connected with the front side wall of the body.

According to an embodiment of the present application, the backplane is provided with a mounting portion, and when an upper volute is provided in the body, the mounting portion is a mounting hole formed in the backplane, and the mounting portion is a mounting hole formed on the backplane. The mounting hole is located above the projected area of the upper volute on the back plate or above the projected area.

According to an embodiment of the present application, it further includes a motor for driving the cross-flow fan to rotate, and the motor is sequentially installed on the rear side wall of the body through a motor bracket and a bracket seat.

According to an embodiment of the present application, it also includes:

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

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

According to an embodiment of the present application, the distance between the side of the main volute facing the cross-flow fan and the rotation center of the cross-flow fan is at the first volute and the second volute reach a minimum value.

According to an embodiment of the present application, the main volute includes a first guide plate, a second guide plate, and a third guide plate disposed between the first guide plate and the second guide plate, the first guide plate and the second guide plate The first volute is formed at the connection of the third guide plate, and the second volute is formed at the connection of the second guide plate and the third guide plate.

According to an embodiment of the present application, the main volute is fixed to the rear side wall of the body through a volute bracket.

The above-mentioned one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

In the range hood of the present application, by arranging a cross-flow fan in the body, the weight and volume of the entire range hood can be reduced by virtue of the advantages of large air volume, small volume and light weight of the cross-flow fan, and the body at the cross-flow fan can be reduced. The thickness is set to the maximum. On the one hand, the installation of the cross-flow fan is convenient. On the other hand, similar shrinkage treatment is performed on other parts of the body, which is conducive to reducing the volume of the whole machine, improving the space utilization rate in the body cavity and making the structure layout more compact. Therefore, the space occupied by the whole machine is reduced, which is beneficial to reduce the weight of the whole machine.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the present application.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the outline structure schematic diagram of the range hood provided by one embodiment of the present application;

Fig. 2 is the outline structure schematic diagram of the range hood provided by another embodiment of the present application;

3 is a schematic diagram of the outline structure of a range hood provided by another embodiment of the present application;

Fig. 4 is the outline structure schematic diagram of the range hood provided by the fourth embodiment of the present application;

Fig. 5 is the outline structure schematic diagram of the range hood provided by the fifth embodiment of the present application;

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

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

Fig. 8 is one of the rear perspective schematic diagrams of the range hood (the cover is in an open state) of the embodiment shown in Fig. 1;

Fig. 9 is the second perspective view of the front side of the range hood (the cover is in an open state) of the embodiment shown in Fig. 1;

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

11 is a schematic structural diagram of a backplane provided by an embodiment of the present application;

12 is a schematic structural diagram of a motor provided by an embodiment of the present application;

13 is a schematic structural diagram of a cross-flow fan provided by an embodiment of the present application;

14 is a schematic diagram of the relationship between the cross-flow fan and the main volute provided by the embodiment of the present application;

FIG. 15 is a schematic diagram of the position and angle relationship between the air inlet and the air outlet of the embodiment shown in FIG. 1 of the present application.

Reference number:

100, the body; 101, the air inlet of the body; 102, the air outlet of the body; 103, the air inlet channel;

104, air outlet channel; 105, arc segment; 106, straight segment; 107, first arc surface; 108, second arc surface; 110, back plate; 111, hanging hole;

112, hanging buckle; 120, cover body; 121, front panel; 122, flat panel; 123, curved panel;

124, side wall; 125, installation flange; 130, top plate; 140, bottom plate; 200, cross-flow fan; 300, main volute; 301, first volute; 302, second volute; 310, first Guide plate; 320, second guide plate; 330, third guide plate; 340, volute bracket;

400, upper volute; 500, opening and closing cover; 600, motor; 700, motor bracket; 701, side plate;

702, fixing plate; 710, bracket seat; 720, motor end cover; 730, shaft sleeve; 800, filter screen.

Detailed ways

The embodiments of the present application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the application, but not to limit the scope of the application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left" and "right" , "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing this The application examples and simplified descriptions are not intended to indicate or imply that the indicated devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application in specific situations.

In the embodiments of the present application, unless otherwise expressly specified and limited, the first feature "on" or "under" the second feature may be in direct contact with the first and second features, or the first and second features pass through the middle indirect contact with the media. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structures, materials, or features are included in at least one example or example of the embodiments of the present application. In this specification, schematic representations of the above terms are not necessarily directed 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, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

1 is a schematic diagram of the outline structure of a range hood provided by an embodiment of the present application; FIG. 6 is a left side view of the range hood (without side panels) of the embodiment shown in FIG. 1 ; FIG. 7 is a schematic diagram of the embodiment shown in FIG. 1 A three-dimensional schematic diagram of a range hood (without a cover); with reference to FIG. 1 , FIG. 6 and FIG. 7 , an embodiment of the present application provides a range hood, which includes a body 100 and a cross-flow fan arranged in the body 100 200.

Specifically, the cross-flow fan 200 is arranged in the body 100, and the extension direction of the cross-flow fan 200 is along the width direction of the body 100, that is to say, the length direction of the cross-flow fan 200 is the same as the width direction of the body 100. The length of the flow fan 200 is much larger than the diameter, and this arrangement is beneficial to reduce the thickness of the body 100 and achieve lightness and thinness.

In this 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. This arrangement, on the one hand, facilitates the installation of the cross-flow fan 200, and on the other hand, performs similar shrinkage treatment on other parts of the body 100, which is beneficial to reduce the volume of the whole body 100, so that the space utilization rate in the chamber of the body 100 is improved, and the structural layout It is more compact, so that the space occupied by the whole machine is reduced, which is beneficial to reduce the weight of the whole machine. The components installed in the body 100 include the cross-flow fan 200, the main volute 300 mentioned below, the upper volute, etc. Among these components, the cross-flow fan 200 has the largest volume. Therefore, first arrange the cross-flow fan 200 in the body. After the position in the body 100, other components can be adapted to the installation of the cross-flow fan 200, which is conducive to the rational layout of the positions of each component, so as to improve the space utilization rate in the body 100 and reduce the weight of the whole machine.

The present application provides various embodiments of the shape of the body 100 , as shown in FIGS. 1 to 5 , corresponding to the shapes of the body 100 of the three types of embodiments:

Example 1

In this embodiment, the cross-flow fan 200 is disposed at the lower part of the body 100 , and the thickness of the body 100 gradually decreases from bottom to top. As shown in FIG. 1 , FIG. 2 and FIG.

Embodiment 2

In this embodiment, the cross-flow fan 200 is disposed at the lower part or the upper part of the body 100 , and the body 100 has the same thickness from bottom to top. As shown in FIG. 3 , the shape of the body 100 is generally a cube.

Embodiment 3

In this embodiment, the cross-flow fan 200 is arranged on the upper part of the body 100, and the thickness of the body 100 gradually decreases from top to bottom. As shown in FIG.

The back side of the body 100 in these three embodiments (the side used for leaning against the wall) is all straight, and the side with the shape change is mainly the side facing the outside (ie, the side facing the user).

The present application only takes the shapes of the body 100 of the above three embodiments as examples for description, and it is not limited that other suitable shapes of the body 100 may also be used in the present application.

According to an embodiment of the present application, the upper part of the body 100 forms the body air outlet 102 , and the lower part of the body 100 forms the body air inlet 101 , so as to form a flow passage for the gas to enter and exit upward.

In this embodiment, the air outlet 102 of the body is arranged obliquely upward to form a form of air outlet obliquely upward, and the air inlet 101 of the body is arranged obliquely downward, so that the air intake and the air outlet do not interfere with each other, and the direction of the air outlet can be avoided. user.

According to an embodiment of the present application, the centerline of the air outlet 102 of the body (ie, the axial direction of the air outlet 102 of the body) is set at an angle with the vertical direction, the angle A is greater than 15°, and the setting of this angle is beneficial to ensure the gas outlet The wind direction is optimal and will not interfere with the user's body.

According to an embodiment of the present application, as shown in FIG. 15 , the center line of the air inlet 101 of the body (ie, the axial direction of the air inlet 101 of the body) is set at an angle with the vertical direction, and the angle B is not less than 20° and not more than 70° °, the setting of this angle is convenient for air intake, and the suction effect is good.

According to an embodiment of the present application, the extending directions of the body air inlet 101 and the body air outlet 102 are both along the width direction of the body 100. In order to ensure the air inlet and air outlet effects, the body air inlet 101 and the body air outlet 102 are as large as possible. , in this embodiment, the lengths of the air inlet 101 and the air outlet 102 of the body are consistent with the width of the body 100, and the width of the air inlet 101 and the air outlet 102 of the body should not be too narrow, and it is necessary to ensure a suitable width, for example, ensure that the width is 250 -450mm, so as to ensure that the body 100 has enough air inlet area and air outlet area.

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

In a specific embodiment, the body 100 includes a back plate 110 and a cover body, the cover body has an opening and a cavity, and the back plate 110 covers the opening to form a closed space surrounded by the cover body. The cover body includes a front panel 121 disposed opposite to the back panel 110 and a side panel 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 panel 124 , the front panel 121 and the back panel 110 are disposed opposite to each other, and the side panel 124 is located between the front panel 121 and the back panel 110 .

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

Specifically, as shown in the body 100 shown in FIG. 6 , the front panel 121 includes a flat panel 122 and a curved panel 123 , the flat panel 122 is arranged above the curved panel 123 , the organic air outlet 102 is formed on the flat panel 122 , and the air outlet 102 is formed on the curved panel 123 . The air inlet 101 of the body, and the air inlet 101 of the body formed by this is arc-shaped. For occupying the same size of space, the air inlet area of the arc-shaped air inlet 101 is larger, which is more conducive to the suction of oil fume, and the arc-shaped body air inlet 101 has a larger air intake area. The tuyere 101 is in the shape of a concave arc as a whole, which is more conducive to the gathering of oil fume, so that more oil fume can be drawn per unit time, and the air in places such as kitchens is ensured to be cleaner; , that is, the distance between the plane plate 122 and the back plate 110 gradually increases from top to bottom, and the cross-flow fan 200 is arranged at the maximum distance between the plane plate 122 and the back plate 110 to facilitate the installation of the cross-flow fan 200 , the body 100 is formed in a water drop shape as a whole, with small size and compact structure.

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

For the body 100 shown in FIG. 1 , the radius of curvature of the curved panel 123 on the side close to the air inlet 101 of the body is greater than the radius of curvature on the side of the curved panel 123 near the back panel 110 , so that the radius of curvature of the curved panel from the front to the back changes from large to small The curved shape not only makes the overall shape of the body smoother, but also facilitates the good connection between the curved panel 123 and the vertically arranged back panel 110, and also facilitates ensuring that the air inlet 101 of the body has a sufficiently large area.

As shown in the body 100 shown in FIG. 5 , the front panel 121 includes a flat panel 122 and a curved panel 123 disposed above the flat panel 122 . The flat panel 122 is inclined from bottom to top in a direction away from the back panel 110 . The upper edge of the flat panel 122 is connected, and the other end of the curved panel 123 is connected to the upper edge of the back panel 110 ; Space, the arc-shaped air outlet 102 of the body has a larger air outlet area, which is more conducive to the discharge of oil fume, so as to ensure that the air in the kitchen and other places is cleaner; the air inlet 101 of the body is formed on the plane plate 122, and the inclination angle of the plane plate 122 needs to ensure that the body enters. The tuyere 101 is inclined downward, and the specific inclination angle refers to the above-mentioned angle B, which is not less than 20° and not more than 70°.

For the body 100 shown in FIG. 5 , the radius of curvature of the curved panel 123 on the side close to the air outlet 102 of the body is larger than the radius of curvature on the side of the curved panel 123 near the back panel 110 , so that the radius of curvature of the curved panel from the front to the back changes from large to small The curved shape not only makes the overall shape of the body smoother, but also facilitates the good connection between the curved panel 123 and the vertically arranged back panel 110, and also facilitates ensuring that the air outlet 102 of the body has a sufficiently large area.

As shown in FIG. 6 , the air outlet channel 104 and the cross-flow fan 200 are staggered in the horizontal direction. As can be seen from FIG. 6 , the cross-flow fan 200 and the air outlet channel 104 are staggered in the chamber of the body 100 to maximize the reduction The space of the body 100 realizes the lightness and thinness of the product.

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

Specifically, as shown in the body 100 shown in FIG. 2 , the front panel 121 includes a top panel 130 , a flat panel 122 and a bottom panel 140 , the top panel 130 includes a horizontal section and an inclined section, the flat panel 122 is vertically arranged, and the upper end of the flat panel 122 and the inclined section The lower edge of the body 100 is connected, and the plane plate 122 is arranged in this way, so that the space in the body 100 is the same at the position where the body 100 is set with the plane plate 122. Therefore, the cross-flow fan 200 can be set on the upper part of the body 100 or lower part. For example, the cross-flow fan 200 can be selected to be installed on the upper part of the body 100, so that the cross-flow fan 200 can be kept away from the fire source, which is beneficial to ensure the safety of the use of the cross-flow fan 200. Of course, for the convenience of installation, the cross-flow fan 200 can also be The fan 200 is installed at the lower part of the body 100, as long as the distance between the body 100 and the fire source is appropriately raised. In this embodiment, the bottom plate 140 is inclined, 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 air outlet 102 of the body is formed in the inclined section, and the air inlet 101 of the body is formed on the bottom plate 140, the inclination angle of the bottom plate 140 and the inclined section can be set according to the angle of the air inlet 101 of the body and the air outlet 102 of the body.

Specifically, as shown in the body 100 shown in FIG. 4 , the front plate 121 includes a flat plate 122 and a bottom plate 140 , the flat plate 122 is inclined from top to bottom in a direction away from the back plate 110 , and the cross-flow fan 200 is installed in the body 100 close to the flat plate 110 . At the lower end of the panel 122, the space is the largest here, which is convenient for the installation of the cross-flow fan 200; the bottom plate 140 includes an inclined section and a horizontal section, the lower end of the flat plate 122 is connected with the upper edge of the inclined section, and the lower edge of the inclined section is connected with a horizontal section. side connection, the other side of the horizontal section is connected to the back plate 110, the air outlet 102 of the body is formed on the plane plate 122, the air inlet 101 of the body is formed in the inclined section, and the position where the plane plate 122 forms the air outlet 102 of the body can be adapted to the air outlet of the body The inclination angle of 102 is subjected to certain bending processing, and the specific bending angle can be set according to specific needs.

According to an embodiment of the present application, as shown in FIG. 1 , the upper end of the flat plate 122 is directly connected with the upper end of the back plate 110 to form a tip, which is similar to an inverted V shape. The body 100 shown in FIG. Small size, easy to install.

According to an embodiment of the present application, as shown in FIG. 2 , the upper end of the flat plate 122 and the upper end of the back plate 110 are connected by a top plate 130 . The top plate 130 is arranged horizontally to form a water drop shape lacking a tip. A missing corner is formed on the top of the frame, which is beneficial to reduce the overall height of the body 100, and is suitable for installation in situations where space is limited, for example, suitable for situations where the kitchen area is small and the floor height is relatively low.

For the convenience of description, this embodiment is described by taking the body 100 as an example of the water drop-shaped structure shown in FIG. 1 .

According to an embodiment of the present application, the air inlet 101 of the body and the air outlet 102 of the body are both equipped with filter screens, which play a protective role on the one hand, and are conducive to filtering oil fume and the like on the other hand. No specific limitation is made. Of course, in order to facilitate later cleaning and maintenance of the cross-flow fan 200 , the filter screen 800 is detachably connected to the body 100 . For example, as shown in FIG. 1 , the edges of the body air inlet 101 and the body air outlet 102 are bent toward the interior of the body 100 to form the mounting flange 125 , and the filter screen 800 is detachably mounted on the mounting flange 125 .

According to an embodiment of the present application, an air purifier is also provided at the air inlet 101 of the body and/or the air outlet 102 of the body, that is to say, an air purifier (not shown in the figure) may be provided at the air inlet 101 of the body, Air purifiers may also be provided at the air outlet 102 of the body, and air purifiers may also be provided at the air inlet 101 and the air outlet 102 of the body at the same time. In order to save costs, in this embodiment, an air purifying element such as activated carbon wool is installed at the air outlet 102 of the body to further separate and filter the oil fume. Wherein, the air purifying member may have a plate-like structure, for example, the air purifying member is a plate-shaped activated carbon wool. By setting the air purifier, it is beneficial to discharge the filtered oil fume into the room to form an internal circulation of the air flow, thereby eliminating the need to open holes in the wall and need to set a long exhaust pipe, saving cost and time; compared with the external circulation of smoke Machine mode, the internal circulation hood is very convenient to install and disassemble.

It should be noted that, in order to facilitate the replacement of the air purifier, the air purifier can also be directly installed at the air inlet 101 and/or the air outlet 102 of the body. For the air outlet 102 of the body, the air purifier can be installed on the side of the air outlet 102 of the air filter 800 facing the air outlet channel 104, that is, the inside; The side of the net 800 facing away from the air inlet channel 103 is the outer side.

In the embodiment of the present application, the upper part of the body 100 is formed with an organic air outlet 102, and the lower part of the body 100 is formed with an organic air inlet 101, forming a form of lower air inlet and upper air outlet; the body 100 is formed with an air inlet channel 103 and an air outlet channel 104, the air inlet channel 103 extends from the air inlet 101 of the body to the air inlet of the cross-flow fan 200, that is, the air inlet 101 of the body is communicated with the air inlet of the cross-flow fan 200 through the air inlet channel 103; The air outlet of the fan 200 extends to the air outlet 102 of the body, that is, the air outlet of the cross-flow fan 200 is communicated with the air outlet 102 of the body through the air outlet channel 104, and the air inlet channel 103 and the air outlet channel 104 are smoothly connected, so that the airflow flows Gentle and smooth. It should be noted that the above "upper" and "lower" are generally based on the installation state of the range hood.

In this embodiment, the air inlet channel 103 and the air outlet channel 104 constitute a flow channel for oil fume circulation, and it is necessary to ensure that the flow channel has fewer corners to prevent the performance of the impeller of the cross-flow fan from being degraded due to excessive local losses.

Compared with the forward multi-blade centrifugal fan, the cross-flow fan 200 has a larger air volume, smaller volume and weight under the same noise volume. Therefore, the range hood can be reduced by using the cross-flow fan 200 instead of the multi-blade centrifugal fan. The weight and volume of the entire range hood.

It should be noted that, in the range hood in this embodiment, as shown in FIG. 6 to FIG. 9 , the air outlet 102 of the body is formed on the upper part of the front side wall of the body 100 , and the air inlet 101 of the body is formed at the lower part of the front side wall of the body 100 . The cross-flow fan 200 is disposed adjacent to the air inlet 101 of the body. Of course, it can be understood that the cross-flow fan 200 and the air inlet 101 of the body maintain a certain safety distance to prevent the fire source of the stove from affecting the cross-flow fan 200 .

In a specific embodiment, a main volute 300 is provided above the cross-flow fan 200, and the main volute 300 is fixed to the rear side wall of the body 100 through the volute bracket 340, so that there are no screws on the side during assembly of the whole machine, and there is no The observed screw structure makes the appearance of the whole machine smooth and beautiful. The main volute 300 extends along the axial direction of the cross-flow fan 200 , so that an air inlet channel 103 and an air outlet channel 104 are formed inside the body 100 . It should be noted that "upper", "upper" and "lower" in the above are all based on the installation state of the range hood, "front side wall" generally refers to the side of the body 100 facing the user, " The "rear side wall" generally refers to the side of the body 100 facing away from the user. Wherein, the main volute 300 and the volute bracket 340 may be detachably connected by connecting parts such as bolts, or may be integrally formed. Wherein, the main volute 300 may be, but not limited to, a single volute and tongue structure or a double volute and tongue structure. The following description will be given by taking the main volute 300 as an example of a double volute tongue structure.

In this embodiment, a first volute 301 and a second volute 302 are respectively formed along the circumferential direction of the cross-flow fan 200 and at both ends of the bottom surface of the main volute 300 . The outlet of the air inlet channel 103 is formed, and the inlet of the air outlet channel 104 is formed between the second volute tongue 302 and the inner wall of the body 100 . After the cross-flow fan 200 is started, a negative pressure area is formed near the air inlet 101 of the body, and the oil fume generated by cooking is quickly sucked into the air inlet channel 103 under the driving of the pressure difference, and the oil fume in the air inlet channel 103 is driven by the cross-flow fan 200. It will be discharged from the air outlet 102 of the body along the air outlet channel 104, so as to facilitate the improvement of the fan efficiency and speed up the purification of oil fume.

Taking the double volute tongue 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. The guide plates 320 are respectively located on the front and rear sides of the third guide plate 330 . That is, the first volute 301 is formed at the connection between the third guide plate 330 and the first guide plate 310, and the second volute 302 is formed at the connection between 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 and the inner wall of the body 100 are surrounded to form an air inlet channel 103, and the air inlet channel 103 extends from the air inlet 101 of the body to the first volute tongue 301, that is, the first scroll The outlet of the air inlet channel 103 is formed between the tongue 301 and the inner wall of the body 100; the rear side wall of the main volute 300, that is, the second guide plate 320 and the inner wall of the body 100 are surrounded to form an air outlet channel 104, and the air outlet channel 104 starts from the second guide plate 320. The two volute tongues 302 extend to the air outlet of the body 100 , that is, the inlet of the air outlet channel 104 is formed between the second volute tongue 302 and the inner wall of the body 100 .

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

Further, as shown in FIG. 14 , the distance between the side of the main volute 300 facing the cross-flow fan 200 and the rotation center of the cross-flow fan 200 reaches a minimum value at the first volute 301 and the second volute 302 That is to say, the distance D between the first volute 301 and the rotation center of the cross-flow fan 200 is equal to the distance between the second volute 302 and the rotation center of the cross-flow fan 200, and the main volute 300 is located in the first The distance between any point between the volute tongue 301 and the second volute tongue 302 and the rotation center of the cross-flow fan 200 is greater than D.

In this embodiment, the included angle α between the first volute 301 and the second volute 302 relative to the rotation center of the cross-flow fan 200 , that is, the rotation center of the cross-flow fan 200 and the first volute 301 and the second volute respectively The included angle α of the connecting lines of 302 is not less than 30° and not more than 160°. For example, the value range of the included angle α is 80°˜120°.

Since the distance D between the first volute 301 and the rotation center of the cross-flow fan 200 is equal to the distance between the second volute 302 and the rotation center of the cross-flow fan 200 , and the main volute 300 faces one side of the cross-flow fan 200 That is, the distance between any point on the third guide plate 330 between the first volute 301 and the second volute 302 and the rotation center of the cross-flow fan 200 is greater than D, so the first volute 301 and the second volute 302 The backflow generated at the wormhole will be constrained between the first volute 301 and the second volute 302, thereby limiting the area of the backflow area, thereby reducing the area occupied by the backflow area for the air duct, thereby not only improving the airflow in the air duct It also reduces the influence of the backflow zone on the air inlet and outlet air flow of the cross-flow fan 200, and improves the efficiency of the fan.

It should be noted that, although the distance between the rotation center of the cross-flow fan 200 and the main volute 300 reaches a minimum value at the first volute 301 and the second volute 302, the third guide plate 330 is located at the first volute. The distance between each point between 301 and the second volute tongue 302 and the rotation center of the cross-flow fan 200 may be different or the same.

Considering that in the case where the air outlet 102 of the body is formed on the front side wall of the body 100, the area above the air outlet 102 of the body 100, that is, the air flow at the top of the body 100 cannot be discharged in time, and the air flow is likely to generate vortices in this area, which in turn produces a vortex. Noise, in order to avoid the above phenomenon, and then ensure that all the air flow in the air outlet channel 104 is smoothly discharged from the air outlet 102 of the body, as shown in Figure 6 and Figure 7, the range hood also includes an upper volute In the air outlet channel 104 and above the air outlet 102 of the body, 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 air outlet 102 of the body.

Therefore, when the flue gas discharged from the cross-flow fan 200 flows upward along the air outlet passage 104, the flue gas is blocked by the upper volute 400 and then flows to the air outlet 102 of the body along the bottom surface of the upper volute 400. . In order to better guide the airflow to the air outlet 102 of the body, the bottom surface of the upper volute 400 is inclined upward from the end connected with the rear side wall of the body 100 to the end connected with the front side wall of the body 100 . In addition, in order to reduce the flow resistance, the bottom surface of the upper volute 400 is a smooth curved surface. For example, as shown in FIG. 6 , the bottom surface of the upper volute 400 is a curved surface raised upward.

Of course, the bottom surface of the upper volute 400 can 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 side wall of the body 100. The other end extends to one end of the second plane, the other end of the second plane extends to the upper edge of the air outlet 102 of the body, and the included angle between the first plane and the second plane is an obtuse angle such as not less than 120°.

In addition, a mounting portion is provided on the back panel 110 . When installing the range hood, by turning the opening of the cover away from the user, the entire range hood can be fixed on the wall by the mounting portion on the back panel 110 . Since the cover is installed on the back panel 110 and the back panel 110 faces the wall, the user can only see the outer wall of the cover. That is to say, after the range hood is installed on the wall, only the cover is exposed to the user. Neither the mounting part of the backplane 110 nor the connecting piece between the backplane 110 and the cover can be seen, which not only improves the appearance of the whole machine, but also avoids the accumulation of dirt.

The mounting portion may be either a hanging hole 111 or a screw hole formed in the backplane 110 , or a screw or a hook mounted on the backplane 110 . Taking the mounting part as the hanging hole 111 as an example, the installer can first fix the hook on the wall, and then hang the body 100 on the hook as a whole, that is, make the free end of the hook extend into the body 100 through the hanging hole 111 and hooked on the back plate 110 . Considering the convenience of mounting, the size of the mounting hole 111 is usually larger than the size of the hook, that is, there is usually a gap between the hook and the mounting hole 111 . Therefore, in order to ensure the closure of the air outlet channel 104 and avoid the air outlet The airflow in the channel 104 leaks through the above-mentioned gap. In the case where the upper volute 400 is provided in the 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 hook The free end of the air outlet extends into the body 100 through the hanging hole 111 and is located above the bottom surface of the upper volute 400 . In addition, this arrangement can not only prevent the air flow in the air outlet channel 104 from leaking, but also prevent the hooks extending into the body 100 from affecting the flow of the air flow in the air outlet channel 104 .

In addition, it should be noted that the cover body and the back plate 110 may be fixedly connected by welding, bonding or the like, or may be detachably connected. Taking the detachable connection as an example, the edges of the two sides of the cover body are bent toward each other to form a flanging, the flanging is provided with a first mounting portion, and the back plate 110 is formed with a second mounting portion corresponding to the first mounting portion one-to-one. The first mounting portion and the second mounting portion may be connected in a manner such as snap connection, hook connection, or the like. Taking hooking as an example, as shown in FIG. 8 and FIG. 11 , the first mounting portion is a hanging hole formed on the flange, the second mounting portion is a hook 112 formed on the back panel 110 , and the hook 112 is located on the back panel 110 . towards the side of the cover. Of course, the hanging holes can also be formed on the back plate 110, and in this case, the hanging buckles 112 are formed on the flanges.

In addition, the cover body and the back plate 110 may also be connected by bolts. Specifically, the flange of the cover body defines a first through hole, and the back plate 110 defines a second through hole corresponding to the first through hole one-to-one. When assembling the body 100, first pass the threaded section of the bolt through the corresponding first through hole from the inside out, then cover the back plate 110 on the opening of the cover body, and make the threaded section of the bolt pass through the corresponding second through hole. The hole is pierced; finally, screw the nut on the threaded section of the bolt. Of course, the cover body and the back plate 110 can be connected by various connection methods. For example, as shown in FIG. 8 , the upper and lower ends of the back plate 110 are connected to the back plate 110 by bolts, and the left and right ends of the back plate 110 are connected by hooking connected to the backplane 110 in a manner.

In addition, in order to improve the strength of the back plate 110, the connection between the back plate 110 and the cover body may be punched to form reinforcing ribs or reinforcing bosses. Wherein, the material of the cover body and the back plate 110 may be, but not limited to, plastic or stainless steel. The cover body can be formed by one-piece injection molding, can also be formed by bending one plate, and of course can also be formed by welding or bonding multiple plates.

As shown in FIG. 1 and FIG. 6 , the direction from the lower edge of the back plate 110 to the lower edge of the flat plate 122 , the curved surface plate 123 extends according to the Archimedes spiral, that is, the orientation shown in FIG. 1 is used as the reference , the left view or right view of the curved panel 123 is a segment of a curve, which is a part of the Archimedes spiral. In order to improve the aesthetics and prevent the body 100 from scratching the user, the curved panel 123 and the flat panel 122 smoothly transition. Thereby, as shown in FIG. 6, the whole body 100 is in the shape of a water drop. The advantages of this arrangement are: on the one hand, the characteristics of the water drop-shaped structure with large lower space and small upper space can be used, which can not only ensure the installation of the cross-flow fan 200 in the body 100, but also avoid the waste of space in the body 100, so that the The interior of the body 100 is more compact; on the other hand, the aesthetics can be improved and the space occupied by the 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 , the motor 600 may be directly connected to the cross-flow fan 200 , or may be connected to the cross-flow fan 200 through a transmission mechanism. Taking the direct connection between the motor 600 and the cross-flow fan 200 as an example, the motor 600 is installed on the backplane 110 through the motor bracket 700 and the bracket seat 710 in sequence. 12 and 13, the motor bracket 700 includes two opposite side plates 701 and a fixing plate 702 located between the two side plates 701. The fixing plate 702 of the motor bracket 700 is fixed to the bracket base 710 by bolts, The motor 600 is disposed between the two side plates 701 of the motor bracket 700 , the side plate 701 facing away from the motor 600 is installed with a motor end cover 720 , and the side plate 701 of the motor bracket 700 adjacent to the cross-flow fan 200 is installed with a bushing 730 , the rotating shaft of the cross-flow fan 200 is connected to the output shaft of the motor 600 through the shaft sleeve 730 . Since the motor 600 is mounted on the backplane 110 through the motor bracket 700 and the bracket seat 710, there are no screws on the side and no observable screw structure during the assembly of the whole machine, so that the appearance of the whole machine is smooth and beautiful, and the grade of the product is improved.

It should be noted that, the motor bracket 700 and the bracket base 710 may be detachably connected by connecting parts such as bolts, or may be integrally formed. Conversely, if the motor 600 is indirectly connected with the cross-flow fan 200 as an example, the transmission mechanism may be, but not limited to, a pulley mechanism or a gear chain mechanism. Taking the pulley mechanism as an example, the pulley mechanism includes a driving pulley, a driven pulley and a belt. The driving pulley is fixed to the output shaft of the motor 600, and the driven pulley is fixed to the rotating shaft of the cross-flow fan 200. The driving pulley is connected to the driven pulley through a belt. Therefore, after the motor 600 is started, the driving wheel rotates synchronously, and the driving wheel will rotate through the belt electric driven wheel, thereby driving the cross-flow fan 200 fixedly connected to the driven wheel to rotate. Since the installation methods of the gear chain mechanism and the pulley mechanism are similar, they will not be repeated here. Compared with the case where the motor 600 is directly connected to the cross-flow fan 200, the indirect connection between the motor 600 and the cross-flow fan 200 through the transmission mechanism can improve the aerodynamic performance of the cross-flow fan 200, but it also increases the risk of vibration of the whole machine. . Therefore, in the actual production process, the designer can select the connection mode of the motor 600 according to the actual needs of the user.

It should be noted that the range hood in this embodiment may have only one cross-flow fan 200 , or may have multiple cross-flow fans 200 . When the range hood includes a plurality of cross-flow fans 200 , the plurality of cross-flow fans 200 are arranged in sequence along the extending direction of the main volute 300 . For example, taking the orientation shown in FIG. 7 as a reference, when the range hood includes two cross-flow fans 200, the motor includes a double-shaft motor, and the two cross-flow fans 200 are respectively arranged on the left and right sides of the double-shaft motor. One output shaft of one of the cross-flow fans 200 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 cross-flow fan 200 .

In addition, as shown in FIGS. 8 to 10 , the body 100 is further provided with an opening and closing cover 500 that can be opened and closed at the body air inlet 101 and/or the body air outlet 102 . The opening and closing cover 500 can be opened and closed electrically or manually. When electric opening and closing is adopted, a driving part needs to be added. 500 can be opened and closed by rotation, and can also be opened and closed by sliding, which is not specifically limited in this embodiment. By controlling the opening and closing degree of the opening and closing cover plate 500, the magnitude of the negative pressure at the air inlet 101 of the body can be controlled, so that the whole machine can be suitable for cooking scenes in the kitchen.

Taking the air inlet 101 of the body as an example, the opening and closing cover 500 can be rotatably connected with the body 100 , or can be slidably arranged on the body 100 . When the opening and closing cover 500 is rotatably connected to the body 100, one end of the opening and closing cover 500 can be rotatably fixed to the body 100 through a rotating shaft, so that the air inlet 101 of the body can be adjusted by rotating the other end of the opening and closing cover 500 the size of. Similarly, when the opening and closing cover 500 is slidably connected to the body 100, one of the opening and closing cover 500 and the body 100 can be provided with a chute, and the other can be provided with a slider, and the slider can be slidably embedded in the chute Therefore, the size of the air inlet 101 of the body can be adjusted by pushing the opening and closing cover 500 . It can be seen that in this embodiment, by disposing the opening and closing cover 500 at the air inlet 101 of the body, not only can the size of the air inlet 101 of the body be adjusted, thereby changing the air intake, but also the air inlet 101 of the body can be closed when the cross-flow fan 200 is stopped. , reduce dust fall and improve aesthetics at the same time.

The installation manner of the opening and closing cover 500 at the air outlet 102 of the body is similar to the above, and will not be repeated here.

It should be noted that, for the air inlet 101 of the body, as shown in FIG. The advantages of this arrangement are: on the one hand, after the opening and closing cover 500 opens the air inlet 101 of the body, the oil fume enters the air inlet 101 of the body from the lower part of the opening and closing cover 500, so that the oil smoke can be prevented from being blocked by the opening and closing cover 500. Quickly enter the body 100 through the body air inlet 101; on the other hand, due to the existence of the opening and closing cover 500, when the oil fume generated during the cooking process rises to the opening and closing cover 500, the oil fume is blocked by the opening and closing cover 500 It will quickly enter the corresponding air inlet 101 of the body along the opening and closing cover 500 . In addition, in order to achieve the effect of collecting smoke, the lower part of the opening and closing cover plate 500 can be bent downward, that is, the opening and closing cover plate 500 is generally 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, that is, the gear position of the motor, the range hood also includes a driving member corresponding to the opening and closing cover 500. The driving member Installed on the body 100 and linked with the motor, the driving member can control the opening and closing of the cover plate 500 according to the gear position of the motor.

The following is still taking the air inlet 101 of the body as an example. When the opening and closing cover 500 at the air inlet 101 of the body is rotatably connected to the body 100, the driving member may be a driving motor connected to the rotating shaft of the opening and closing cover 500. The driving motor and the motor Linkage; when the opening and closing cover plate 500 at the air inlet 101 of the body is slidably connected to the body 100, the driving member may be, but not limited to, a miniature air cylinder or a lead screw mechanism. If the driving member is a miniature cylinder, the cylinder body of the miniature cylinder is fixed to the body 100, and the piston rod of the miniature cylinder extends along the height direction of the air inlet 101 of the body and is connected with the opening and closing cover plate 500, so that when the piston rod moves relative to the cylinder body Then, the opening and closing cover 500 can be driven to slide relative to the body 100 , thereby opening or closing the corresponding body air inlet 101 . If the driving member is a screw mechanism, a chute can be provided on the body 100, a slider can be fixed on the opening and closing cover 500, and the slider can be slidably embedded in the chute. Installed on the body 100 and parallel to the chute, the slider is provided with a threaded through hole which is matched with the screw thread, so that when the screw motor drives the screw to rotate, the slider will move along the screw, thereby driving the fixed screw. The opening and closing cover 500 slides relative to the body 100 .

In this embodiment, the air outlet channel 104 is gradually expanded 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 air outlet 102 of the body. Therefore, not only can the air outlet resistance of the cross-flow fan 200 be reduced, but also the ability to resist back pressure can be improved.

Based on the orientation shown in FIG. 7 , the blades of the cross-flow fan 200 extend in the left-right direction, that is, along the width direction of the body 100 , the air inlet channel 103 is located in front of the cross-flow fan 200 , and the air outlet channel 104 is located in the cross-flow fan. At the rear of 200 , the air outlet channel 104 includes an arc-shaped section 105 and a straight section 106 that communicate 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 . The radius of curvature of one end of the arcuate section 105 away from the straight section 106 is adapted to the shape of the cross-flow fan 200 .

In this embodiment, the air outlet channel 104 is connected to the air outlet 102 of the body through a curved section, and the curved section includes a first arc-shaped surface 107 and a second arc-shaped surface 108, and the first arc-shaped surface 107 and the second arc-shaped surface. 108 is butted to form the curved section, wherein the radius of curvature of the first arc-shaped surface 107 is greater than the radius of curvature of the second arc-shaped surface 108 , in other words, the curvature of the first arc-shaped surface 107 in this embodiment is greater than that of the second arc-shaped surface 108 The curvature of the surface 108, the advantage of this design is that when the airflow flows through the curved section, most of the airflow is mainly concentrated at the first arc-shaped surface 107, and the curvature radius of the first arc-shaped surface 107 is set to be larger, which is conducive to smooth airflow. Through, the resistance of the airflow passing through is smaller, and the airflow mobility is better.

Of course, the air outlet channel 104 can also be composed of only a plurality of arc segments 105 , that is, the straight segments 106 in the above can also be replaced by arc segments.

In this embodiment, the cross-flow fan 200 is used as the air flow driving component, and the whole machine is small in size, with a larger air volume at the same noise volume, and at the same time, the whole machine is small in weight and convenient in installation. In addition, by using the cross-flow fan 200 as the airflow driving component of the range hood, the performance of the whole machine is more suitable for the user's needs, minus the high back pressure working ability that the user does not need, and brings high flow, low noise, The advantages of low weight, small size and beautiful appearance.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

The above embodiments are only used to illustrate the present application, but not to limit the present application. Although the present application has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements to the technical solutions of the present application do not depart from the spirit and scope of the technical solutions of the present application, and should cover within the scope of the claims of this application.

Claims

A range hood is characterized in that, comprising:

body;

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

The thickness of the body at the location where the cross-flow fan is located is the largest.
The range hood according to claim 1, wherein the cross-flow fan is arranged at the lower part of the body, and the thickness of the body gradually decreases from bottom to top.
The range hood according to claim 1, wherein the cross-flow fan is arranged at the lower part or the upper part of the body, and the thickness of the body is uniform from bottom to top.
The range hood according to claim 1, wherein the cross-flow fan is arranged on the upper part of the body, and the thickness of the body gradually decreases from top to bottom.
The range hood according to any one of claims 1-4, wherein the upper part of the body forms an organic air outlet, the lower part of the body forms an organic air inlet, and the body air outlet is arranged obliquely upward.
The range hood according to claim 5, wherein the air inlet of the body is arranged obliquely downward.
The range hood according to claim 5, wherein the center line of the air outlet of the body is arranged at an angle with the vertical direction, and the angle is greater than 15°.
The range hood according to claim 6, wherein the center line of the air inlet of the body is arranged at an angle with the vertical direction, and the angle is not less than 20° and not more than 70°.
The range hood according to claim 5, wherein the extending directions of the body air inlet and the body air outlet are both along the width direction of the body.
The range hood according to claim 5, wherein the body includes a back plate and a cover body, the cover body has an opening and a cavity, the back plate is covered on the opening, and the cover body includes A front panel arranged opposite to the back panel and a side enclosure panel arranged between the front panel and the back panel.
The range hood according to claim 10, wherein the air outlet of the body is opened on the front plate.
The range hood according to claim 10, wherein the front panel comprises a flat panel and a curved panel disposed below the flat panel, the flat panel is inclined from top to bottom in a direction away from the back panel , one end of the curved panel is connected to the lower edge of the flat panel, and the other end of the curved panel is connected to the lower edge of the back panel; the air outlet of the body is formed on the flat panel, and the air inlet of the body is The tuyere is formed on the curved panel.
The range hood according to claim 10, wherein the front panel comprises a flat panel and a curved panel disposed above the flat panel, the flat panel is inclined from bottom to top in a direction away from the back panel , one end of the curved panel is connected to the upper edge of the flat panel, and the other end of the curved panel is connected to the upper edge of the back panel; the air outlet of the body is formed on the curved panel, and the air inlet of the body The tuyere is formed on the flat panel.
The range hood according to claim 10, wherein the front panel comprises a top panel, a flat panel and a bottom panel, the top panel comprises a horizontal section and an inclined section, the flat panel is vertically arranged and the upper end of the flat panel is It is connected with the lower edge of the inclined section, the bottom plate is inclined, 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, and the air outlet of the body is formed. In the inclined section, the air inlet of the body is formed on the bottom plate.
The range hood according to claim 10, wherein the front panel comprises a flat panel and a bottom panel, the flat panel is inclined from top to bottom in a direction away from the back panel, and the bottom panel comprises an inclined section and a horizontal The lower end of the flat plate is connected to the upper edge of the inclined segment, the lower edge of the inclined segment is connected to one side of the horizontal segment, and the other side of the horizontal segment is connected to the back plate, The air outlet of the body is formed on the plane plate, and the air inlet of the body is formed in the inclined section.
The range hood according to claim 12, wherein the upper end of the flat plate is connected with the upper end of the back plate to form a tip.
The range hood according to claim 12, wherein the upper end of the flat plate and the upper end of the back plate are connected by a top plate, and the top plate is arranged horizontally.
The range hood according to claim 5, wherein a filter screen is provided at the air inlet of the body and the air outlet of the body.
The range hood according to claim 18, characterized in that, an air purifier is further provided at the air inlet of the body and/or the air outlet of the body.
The range hood according to claim 5, wherein the body is provided with an opening and closing cover plate that can be opened and closed at the air inlet of the body.
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, and the air outlet of the cross-flow fan and the air outlet of the body are formed. An air outlet channel is formed therebetween, and the air outlet channel is gradually expanded along the air outlet direction.
The range hood according to 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.
The range hood according to claim 22, wherein the air outlet channel is connected to the air outlet of the body through a curved section, the curved section includes a first arc-shaped surface and a second arc-shaped surface, and the first arc-shaped surface is The radius of curvature of one arc-shaped surface is larger than the radius of curvature of the second arc-shaped surface.
The range hood according to claim 21, wherein the air outlet channel and the cross-flow fan are arranged staggered in a horizontal direction.
The range hood according to claim 21, wherein an upper volute is arranged in the air outlet channel, the upper volute is located above the air outlet of the body, and one end of the upper volute extends to the The rear side wall of the body, and the other end of the upper volute extends to the upper edge of the air outlet of the body.
The range hood according to claim 25, wherein the bottom surface of the upper volute is inclined upward from the end connected with the rear side wall of the body to the end connected with the front side wall of the body.
The range hood according to claim 10, wherein the back plate is provided with a mounting portion, and when an upper volute is provided in the body, the mounting portion is a hanging portion formed on the back plate. A mounting hole is provided, and the mounting hole is located on the projection area of the upper volute on the back plate or above the projection area.
The range hood according to any one of claims 1-4, further comprising a motor for driving the cross-flow fan to rotate, and the motor is sequentially installed on the rear of the body through a motor bracket and a bracket seat. side wall.
The range hood according to claim 21, characterized in that, further comprising:

The main volute is arranged in the body and located above the cross-flow fan, and the main volute extends along the axial direction of the cross-flow fan.
The range hood according to claim 29, wherein a first volute and a second volute are respectively formed along the circumferential direction of the cross-flow fan and at both ends of the bottom surface of the main volute; An outlet of the air inlet channel is formed between a volute tongue and the inner wall of the body, and an inlet of the air outlet channel is formed between the second volute tongue and the inner wall of the body.
The range hood according to claim 30, wherein the distance between the side of the main volute facing the cross-flow fan and the rotation center of the cross-flow fan is between the first volute and the other side. The minimum value is reached at the second cochlea.
The range hood according to claim 30, wherein the main volute comprises a first guide plate, a second guide plate and a third guide plate arranged between the first guide plate and the second guide plate, the The first volute tongue is formed at the connection between the first guide plate and the third guide plate, and the second volute is formed at the connection between the second guide plate and the third guide plate.
The range hood according to claim 29, wherein the main volute is fixed to the rear side wall of the body through a volute bracket.