Range hood

Abstract

The present application relates to the technical field of kitchen appliances, and provides a range hood. The range hood comprises a machine body, a cross-flow fan arranged in the machine body, and the extension direction of the cross-flow fan is along the width direction of the machine body; and the thickness of the machine body at the position of the cross-flow fan is the largest. The present application is beneficial to reducing the volume of the whole machine, improving the space utilization in the machine cavity, and making the structure layout more compact, so that the occupied space of the whole machine is reduced, and the weight of the whole machine is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a range hood. BACKGROUND

[0002] The range hood is a device that can carry out impurity removal, purification and other treatment work on the polluted air. The range hood commonly used in the kitchen forms a negative pressure zone in a certain space range above the stove through the high-speed rotation of the internal fan, and then the oil fume gas in the room is sucked into the range hood and the oil fume is separated. Since the forward multi-blade centrifugal fan has high back pressure performance, it can maintain a large air volume within a wide flow passage pressure interval by changing the speed, and at the same time, the noise can be kept at a low level, so the range hood generally uses a forward multi-blade centrifugal fan. However, in order to achieve high pressure and high back pressure performance, the size of the multi-blade centrifugal fan volute is large, which leads to a large size and weight of the range hood. SUMMARY

[0003] 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 small occupied space, compact structure and light weight.

[0004] The range hood according to an embodiment of the present application comprises:

[0005] A machine body;

[0006] A cross-flow fan arranged in the machine body, and the extension direction of the cross-flow fan is along the width direction of the machine body;

[0007] The thickness of the machine body at the position of the cross-flow fan is the largest.

[0008] The range hood according to an embodiment of the present application sets the thickness of the machine body at the position of the cross-flow fan to be the largest, which on the one hand facilitates the installation of the cross-flow fan, and on the other hand, the other parts of the machine body are similarly contracted, which is beneficial to reduce the size of the whole machine, improve the space utilization rate in the machine body cavity, and make the structure layout more compact, so as to reduce the occupied space of the whole machine and reduce the weight of the whole machine.

[0009] According to an embodiment of the present application, the cross-flow fan is arranged at the lower part of the machine body, and the thickness of the machine body gradually decreases from bottom to top.

[0010] According to an embodiment of the present application, 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.

[0011] According to an embodiment of the present application, the cross-flow fan is arranged at the upper part of the machine body, and the thickness of the machine body gradually decreases from top to bottom.

[0012] According to an embodiment of the present application, the upper part of the body forms a body air outlet, and the lower part of the body forms a body air inlet, and the body air outlet is arranged obliquely upward.

[0013] According to an embodiment of the present application, the body air inlet is arranged obliquely downward.

[0014] According to an embodiment of the present application, the center line of the body air outlet is arranged at an angle with the vertical direction, and the angle is greater than 15°.

[0015] According to an embodiment of the present application, the center line of the body air inlet is arranged at an angle with the vertical direction, and the angle is not less than 20° and not more than 70°.

[0016] According to an embodiment of the present application, the extension directions of the body air inlet and the body air outlet are along the width direction of the body.

[0017] According to an embodiment of the present application, the body comprises a back plate and a cover body, the cover body has an opening and a cavity, the back plate covers the opening, the cover body comprises a front plate arranged opposite to the back plate and a side plate arranged between the front plate and the back plate.

[0018] According to an embodiment of the present application, the body air outlet is arranged on the front plate.

[0019] According to an embodiment of the present application, the front plate comprises a flat plate and a curved plate arranged below the flat plate, the flat plate is inclined away from the back plate from top to bottom, one end of the curved plate is connected with the lower edge of the flat plate, and the other end of the curved plate is connected with the lower edge of the back plate; the body air outlet is arranged on the flat plate, and the body air inlet is arranged on the curved plate.

[0020] According to an embodiment of the present application, the front plate comprises a flat plate and a curved plate arranged above the flat plate, the flat plate is inclined away from the back plate from bottom to top, 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 body air outlet is arranged on the curved plate, and the body air inlet is arranged on the flat plate.

[0021] According to an embodiment of the present application, the front plate comprises a top plate, a flat plate and a bottom plate, the top plate comprises a horizontal section and an inclined section, the flat plate is arranged vertically, and the upper end of the flat plate is connected with the lower edge of the inclined section, the bottom plate is arranged obliquely, 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 arranged on the inclined section, and the body air inlet is arranged on the bottom plate.

[0022] According to one embodiment of the present application, the front plate comprises a plane plate and a bottom plate, the plane plate is inclined from top to bottom towards the direction away from the back plate, the bottom plate comprises 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 air outlet of the machine body is formed in the plane plate, and the air inlet of the machine body is formed in the inclined section.

[0023] According to one embodiment of the present application, the upper end of the plane plate is connected with the upper end of the back plate to form a pointed end.

[0024] According to one embodiment of the present application, the upper end of the plane plate is connected with the upper end of the back plate through a top plate, and the top plate is arranged horizontally.

[0025] According to one embodiment of the present application, filter screens are arranged at the air inlet of the machine body and the air outlet of the machine body.

[0026] According to one embodiment of the present application, air purification members are further arranged at the air inlet of the machine body and / or the air outlet of the machine body.

[0027] According to one embodiment of the present application, the machine body is provided with an openable and closable cover plate which can be opened and closed at the air inlet of the machine body.

[0028] According to one embodiment of the present application, an air inlet channel is formed between the air inlet of the machine 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 machine body, and the air outlet channel is gradually expanded along the air outlet direction.

[0029] According to one embodiment of the present application, 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.

[0030] According to one embodiment of the present application, the air outlet channel is connected with the air outlet of the machine body through a bending section, the bending section comprises a first arc-shaped surface and a second arc-shaped surface, and the curvature radius of the first arc-shaped surface is greater than that of the second arc-shaped surface.

[0031] According to one embodiment of the present application, the air outlet channel and the cross-flow fan are arranged in a staggered manner along the horizontal direction.

[0032] According to one 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 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.

[0033] According to one embodiment of the present application, the bottom surface of the upper volute is inclined upward from one end connected with the rear side wall of the machine body to the other end connected with the front side wall of the machine body.

[0034] According to one embodiment of the present application, the back plate is provided with a mounting portion, in the case of the upper volute being provided in the machine body, the mounting portion is a hanging hole formed in the back plate, and the hanging hole is located in the projection area of the upper volute on the back plate or above the projection area.

[0035] According to one embodiment of the present application, a motor for driving the cross-flow fan to rotate is further included, and the motor is mounted on the rear side wall of the machine body through a motor support and a support seat in sequence.

[0036] According to one embodiment of the present application, further comprising:

[0037] A main volute is provided in the machine body and located above the cross-flow fan, and the main volute extends along the axial direction of the cross-flow fan.

[0038] According to one embodiment of the present application, a first volute tongue and a second volute tongue are respectively formed at two ends of the bottom surface of the main volute along the circumferential direction of the cross-flow fan; the first volute tongue and the inner wall of the machine body form the outlet of the air inlet channel, and the second volute tongue and the inner wall of the machine body form the inlet of the air outlet channel.

[0039] According to one embodiment of the present application, the distance between the side of the main volute facing the cross-flow fan and the center of rotation of the cross-flow fan reaches a minimum value at the first volute tongue and the second volute tongue.

[0040] According to one embodiment of the present application, the main volute comprises a first guide plate, a second guide plate, and a third guide plate provided between the first guide plate and the second guide plate, the connection between the first guide plate and the third guide plate forms the first volute tongue, and the connection between the second guide plate and the third guide plate forms the second volute tongue.

[0041] According to one embodiment of the present application, the main volute is fixed to the rear side wall of the machine body through a volute support.

[0042] The one or more technical solutions in the embodiments of the present application at least have one of the following technical effects:

[0043] The oil fume exhauster in the present application, by setting the cross-flow fan in the body, can reduce the weight and volume of the whole oil fume exhauster by virtue of the advantages of large air volume, small volume and light weight of the cross-flow fan, and the thickness of the body at the cross-flow fan is set to be maximum, which is convenient for the installation of the cross-flow fan, and the other parts of the body are similarly shrunk, which is beneficial to reduce the volume of the whole body, improve the space utilization rate in the body cavity and make the structure layout more compact, so as to reduce the space occupied by the whole machine and reduce the weight of the whole machine.

[0044] Additional aspects and advantages of the present application will be set forth in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0046] Figure 1 is the external structure schematic diagram of the oil fume exhauster provided by an embodiment of the present application;

[0047] Figure 2 is the external structure schematic diagram of the oil fume exhauster provided by another embodiment of the present application;

[0048] Figure 3 is the external structure schematic diagram of the oil fume exhauster provided by another embodiment of the present application;

[0049] Figure 4 is the external structure schematic diagram of the oil fume exhauster provided by a fourth embodiment of the present application;

[0050] Figure 5 is the external structure schematic diagram of the oil fume exhauster provided by a fifth embodiment of the present application;

[0051] Figure 6 is Figure 1 the left view schematic diagram of the oil fume exhauster (without side wall) of the embodiment shown;

[0052] Figure 7 is Figure 1 the perspective schematic diagram of the oil fume exhauster (without cover body) of the embodiment shown;

[0053] Figure 8 is Figure 1 one of the back perspective schematic diagrams of the oil fume exhauster (the cover plate is in the open state) of the embodiment shown;

[0054] Figure 9 is Figure 1 Fig. 2 is a front perspective view of the range hood (with the cover in the open state) according to the embodiment shown in Fig. 1;

[0055] Figure 10 is Figure 1 Fig. 3 is a front perspective view of the range hood (with the cover in the closed state) according to the embodiment shown in Fig. 1;

[0056] Figure 11 is a structural schematic view of the back plate according to the embodiment of the present application;

[0057] Figure 12 is a structural schematic view of the motor according to the embodiment of the present application;

[0058] Figure 13 is a structural schematic view of the cross-flow fan according to the embodiment of the present application;

[0059] Figure 14 is a schematic view of the relationship between the cross-flow fan and the main volute according to the embodiment of the present application;

[0060] Figure 15 is a schematic view of the relationship between the cross-flow fan and the main volute according to the embodiment of the present application; Figure 1 Fig. 6 is a schematic view of the position and angle relationship between the air inlet and the air outlet according to the embodiment shown in Fig. 1.

[0061] Reference signs:

[0062] 100, machine body; 101, machine body air inlet; 102, machine body air outlet; 103, air inlet channel;

[0063] 104, air outlet channel; 105, arc-shaped section; 106, straight section; 107, first arc-shaped surface; 108, second arc-shaped surface; 110, back plate; 111, hanging hole;

[0064] 112, hanging buckle; 120, cover body; 121, front plate; 122, flat plate; 123, curved plate;

[0065] 124, side wall plate; 125, mounting flange; 130, top plate; 140, bottom plate; 200, cross-flow fan; 300, main volute; 301, first volute tongue; 302, second volute tongue; 310, first guide plate; 320, second guide plate; 330, third guide plate; 340, volute support;

[0066] 400, upper volute; 500, opening and closing cover; 600, motor; 700, motor support; 701, side plate;

[0067] 702, fixing plate; 710, support seat; 720, motor end cover; 730, shaft sleeve; 800, filter screen. DETAILED DESCRIPTION

[0068] The embodiments of the present application will be further described in details below with reference to the drawings and embodiments. The following embodiments are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0069] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the embodiments of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only used for description purposes and cannot be understood as indicating or implying relative importance.

[0070] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0071] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0072] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0073] Figure 1 is a schematic diagram of the outer shape structure of the range hood provided by an embodiment of the present application; Figure 6 is Figure 1 is a left view schematic diagram of the range hood (without side panels) of the embodiment shown; Figure 7 is Figure 1 is a schematic diagram of the range hood (without cover) of the embodiment shown; in combination with Figure 1 , Figure 6 and Figure 7 , the embodiment of the present application provides a range hood, which comprises a machine body 100 and a cross-flow fan 200 arranged in the machine body 100.

[0074] Specifically, the cross-flow fan 200 is arranged in the machine body 100, and the extension direction of the cross-flow fan 200 is along the width direction of the machine body 100, that is, the length direction of the cross-flow fan 200 is the same as the width direction of the machine body 100. Generally, the length of the cross-flow fan 200 is much larger than the diameter. Such arrangement is beneficial to thin the thickness of the machine body 100 and realize light and thin.

[0075] In the embodiment, the thickness of the machine body 100 at the position of the cross-flow fan 200 is the largest, in other words, the chamber space of the machine body 100 at the position of the cross-flow fan 200 is the largest. Such arrangement is beneficial to reduce the volume of the whole machine body 100, improve the space utilization rate in the chamber of the machine body 100, and make the structure layout more compact, so as to reduce the space occupied by the whole machine and reduce the weight of the whole machine. The components installed in the machine body 100 include the cross-flow fan 200, the main volute 300 mentioned below, the upper volute, etc. Among these components, the volume of the cross-flow fan 200 is the largest. Therefore, after arranging the position of the cross-flow fan 200 in the machine body 100, the positions of other components can be adapted to the installation of the cross-flow fan 200, so as to reasonably arrange the positions of various components and improve the space utilization rate in the machine body 100 and reduce the weight of the whole machine.

[0076] The present application provides various embodiments of the body 100 shape, as shown in Figures 1 to 5 The body 100 shape corresponding to three types of embodiments:

[0077] Embodiment one

[0078] In this embodiment, the cross-flow fan 200 is arranged at the lower part of the body 100, and the thickness of the body 100 gradually decreases from bottom to top, as shown in Figure 1 , Figure 2 and Figure 4 The body 100 shape forms a shape of small top and large bottom.

[0079] Embodiment two

[0080] In this embodiment, the cross-flow fan 200 is arranged at the lower part or the upper part of the body 100, and the thickness of the body 100 is consistent from bottom to top, as shown in Figure 3 The body 100 shape is generally a square.

[0081] Embodiment three

[0082] In this embodiment, the cross-flow fan 200 is arranged at the upper part of the body 100, and the thickness of the body 100 gradually decreases from top to bottom, as shown in Figure 5 The body 100 shape forms a shape of large top and small bottom.

[0083] The back of the body 100 (the side for leaning against the wall) of the three embodiments is a straight surface, and the side that changes in shape is mainly the side facing outward (i.e. the side facing the user).

[0084] The present application only takes the body 100 shape of the above three embodiments as an example for description, and does not limit the present application, which can also adopt other suitable body 100 shapes.

[0085] According to one embodiment of the present application, the upper part of the body 100 is formed with a body air outlet 102, and the lower part of the body 100 is formed with a body air inlet 101, thereby forming a flow passage of gas flowing from bottom to top.

[0086] In this embodiment, the body air outlet 102 is arranged obliquely upward, forming an oblique upward air outlet form, and the body air inlet 101 is arranged obliquely downward, so that the air inlet and the air outlet do not interfere with each other, and the direction of the air outlet can avoid the user.

[0087] According to one embodiment of the present application, the center line of the body air outlet 102 (i.e. the axial direction of the body air outlet 102) is arranged at an angle with the vertical direction, and the angle A is greater than 15°. The arrangement of the angle is beneficial to ensure the optimal direction of the air outlet of the gas, and will not interfere with the user's body.

[0088] According to one embodiment of the present application, as shown inFigure 15 As shown, the center line of the machine body air inlet 101 (i.e. the axial direction of the machine body air inlet 101) is arranged at an angle with the vertical direction, and the angle B is not less than 20° and not more than 70°. The arrangement of the angle facilitates air intake and good suction effect.

[0089] According to one embodiment of the present application, the extending directions of the machine body air inlet 101 and the machine body air outlet 102 are along the width direction of the machine body 100. In order to ensure the air intake and air outlet effect, the machine body air inlet 101 and the machine body air outlet 102 are as large as possible. In this embodiment, the length of the machine body air inlet 101 and the machine body air outlet 102 is consistent with the width of the machine body 100, and the width of the machine body air inlet 101 and the machine body air outlet 102 is not too narrow. It is necessary to ensure a suitable width, for example, to ensure 250-450 mm, so as to ensure that the machine body 100 has sufficient air intake area and air outlet area.

[0090] In another embodiment, the projection of the machine body air inlet 101 and the machine body air outlet 102 are both rectangular and have the same width, and are arranged centrally relative to the left-right direction of the whole machine. The air intake and air outlet structure can also be other shapes to meet different appearance requirements.

[0091] In one specific embodiment, the machine body 100 includes a back plate 110 and a cover body, the cover body has an opening and a recess, and the back plate 110 is arranged on the opening to form a closed space with the cover body. The cover body includes a front plate 121 opposite to the back plate 110 and a side plate 124 between the front plate 121 and the back plate 110. Figure 7 As shown, the cover body includes a front plate 121 and a side plate 124, the front plate 121 is arranged opposite to the back plate 110, and the side plate 124 is between the front plate 121 and the back plate 110.

[0092] In order to facilitate air outlet, in the embodiment of the present application, the machine body air outlet 102 is arranged on the front plate 121, i.e. the plate body on the side facing the user.

[0093] Specifically, as shown in Figure 6The front plate 121 of the machine body 100 shown includes a flat plate 122 and a curved plate 123, the flat plate 122 is arranged above the curved plate 123, the machine air outlet 102 is formed on the flat plate 122, and the machine air inlet 101 is formed on the curved plate 123, the machine air inlet 101 formed in this way is arc-shaped, for occupying the same size of space, the arc-shaped machine air inlet 101 has a larger air inlet area, is more conducive to oil smoke suction, and the arc-shaped machine air inlet 101 is entirely concave arc-shaped, is more conducive to oil smoke gathering, so that the oil smoke suction per unit time can be more, and the air in the kitchen and the like is ensured to be cleaner; the flat plate 122 is inclined from top to bottom away from the back plate 110, that is, the distance between the flat 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 flat plate 122 and the back plate 110, the cross-flow fan 200 is convenient to install, and the machine body 100 as a whole forms a water drop shape, is small and compact, and has a compact structure.

[0094] Further, one end of the curved plate 123 is connected with the lower edge of the flat plate 122, and the other end of the curved plate 123 is connected with the lower edge of the back plate 110. Among them, the flat plate 122 can be directly connected with the back plate 110, or indirectly connected with the back plate 110 through the side wall plate 124. For example, as shown in the figure, Figure 6 The upper edge of the flat plate 122 extends to the back plate 110, that is, the flat plate 122 and the back plate 110 form an inverted V-shaped structure. In this case, the side wall plate 124 includes a left side plate and a right side plate, the left edge of the back plate 110 and the left edge of the front plate 121 are respectively connected with the left side plate, and the right edge of the back plate 110 and the right edge of the front plate 121 are respectively connected with the right side plate.

[0095] For Figure 1 The curved plate 123 of the machine body 100 shown has a curvature radius near the machine air inlet 101 side larger than a curvature radius near the back plate 110 side, so as to form an arc shape with the curvature radius of the curved plate from front to back gradually decreasing, not only making the overall appearance of the machine more smooth, but also facilitating the good connection of the curved plate 123 with the vertically arranged back plate 110, and in addition, facilitating the guarantee of the machine air inlet 101 having a large enough area.

[0096] As Figure 5The body 100 shown, the front plate 121 includes a flat plate 122 and a curved plate 123 arranged above the flat plate 122, the flat plate 122 is inclined from bottom to top away from the back plate 110, one end of the curved plate 123 is connected with the upper edge of the flat plate 122, and the other end of the curved plate 123 is connected with the upper edge of the back plate 110; The body air outlet 102 is formed in the curved plate 123, and the body air outlet 102 formed in this way is arc-shaped, and for occupying the same size of space, the arc-shaped body air outlet 102 has larger air outlet area, which is more conducive to the exhaust of oil fume, so as to ensure that the air in the kitchen and other places is cleaner; The body air inlet 101 is formed in the flat plate 122, and the inclination angle of the flat plate 122 needs to ensure that the body air inlet 101 is inclined downward, and the specific inclination angle is referred to the above-mentioned angle B, which is not less than 20° and not more than 70°.

[0097] For Figure 5 The body 100 shown, the curvature radius of the curved plate 123 near the body air outlet 102 side is greater than the curvature radius of the curved plate 123 near the back plate 110 side, so as to form an arc shape whose curvature radius decreases from front to back, not only making the overall appearance of the body more smooth, but also facilitating the good connection of the curved plate 123 with the vertically arranged back plate 110, in addition, it is also convenient to ensure that the body air outlet 102 has a large enough area.

[0098] As Figure 6 It can be seen that the through-flow fan 200 and the air outlet channel 104 are staggered in the horizontal direction within the cavity of the body 100, so as to maximize the reduction of the space of the body 100, and realize the thinning of the product. Figure 6 It can be seen that the through-flow fan 200 and the air outlet channel 104 are staggered in the horizontal direction within the cavity of the body 100, so as to maximize the reduction of the space of the body 100, and realize the thinning of the product.

[0099] Of course, it can be understood that the air outlet channel 104 and the through-flow fan 200 can have partial overlap in the vertical direction, so as to reduce the height of the body 100.

[0100] Specifically, as Figure 2The body 100 shown in the figure, the front plate 121 includes a top plate 130, a flat plate 122 and a bottom plate 140, the top plate 130 includes a horizontal section and an inclined section, the flat plate 122 is vertically arranged and the upper end of the flat plate 122 is connected with the lower edge of the inclined section, the flat plate 122 is arranged in this way, so that the space in the body 100 is uniform at the position where the flat plate 122 is arranged, thereby, the cross-flow fan 200 can be arranged at the upper part or the lower part of the body 100 according to the requirement. For example, the cross-flow fan 200 can be arranged at the upper part of the body 100, so that the cross-flow fan 200 is far away from the fire source, which is beneficial to ensure the safety of the cross-flow fan 200, of course, in order to facilitate the installation, the cross-flow fan 200 can also be 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 the embodiment, the bottom plate 140 is arranged in an inclined manner, the lower end of the flat plate 122 is connected with the upper edge of the bottom plate 140, the lower edge of the bottom plate 140 is connected with the back plate 110, the body air outlet 102 is formed in the inclined section, and the body air inlet 101 is formed in the bottom plate 140, and the inclined angle of the bottom plate 140 and the inclined section can be arranged according to the angle of the body air inlet 101 and the body air outlet 102.

[0101] Specifically, as shown in the figure, Figure 4 The body 100 shown in the figure, the front plate 121 includes a flat plate 122 and a bottom plate 140, the flat plate 122 is inclined from top to bottom away from the back plate 110, the cross-flow fan 200 is arranged in the body 100 close to the lower end of the flat plate 122, which is the largest space, facilitating 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, the lower edge of the inclined section is connected with one side of the horizontal section, and the other side of the horizontal section is connected with the back plate 110, the body air outlet 102 is formed in the flat plate 122, and the body air inlet 101 is formed in the inclined section, and the position of the flat plate 122 forming the body air outlet 102 can be bent according to the inclined angle of the body air outlet 102, and the bending angle can be set according to the specific requirement, and the inclined angle of the inclined section of the bottom plate 140 is set according to the angle of the body air inlet 101.

[0102] According to one embodiment of the present application, as shown in the figure, Figure 1 The upper end of the flat plate 122 is directly connected with the upper end of the back plate 110 to form a sharp end, which is similar to an inverted V-shaped, Figure 1 The body 100 shown in the figure is similar to a water drop, which is beautiful in appearance, small in size and convenient to install.

[0103] According to one embodiment of the present application, as shown in the figure, Figure 2As shown, the upper end of the flat plate 122 is connected with the upper end of the back plate 110 through the top plate 130, which is horizontally arranged to form a water drop shape without a pointed end. By forming a cornerless water drop-shaped machine body 100, the overall height of the machine body 100 is reduced, which is suitable for installation in a space-limited environment, such as a kitchen with a small area and a low floor height.

[0104] For the convenience of description, the embodiment is described by taking the machine body 100 as a water drop shape. Figure 1 The water drop-shaped structure is described by way of example.

[0105] According to an embodiment of the present application, a filter screen is installed at the machine body air inlet 101 and the machine body air outlet 102, which plays a protective role and is beneficial to filtering oil fume. The specific form of the filter screen is not limited in the embodiment. Of course, in order to facilitate the cleaning and maintenance of the cross-flow fan 200, the filter screen 800 is detachably connected with the machine body 100. For example, as shown in the figure, the filter screen 800 is detachably connected with the machine body 100 through the mounting flange 125. Figure 1 As shown, the edges of the machine body air inlet 101 and the machine body air outlet 102 are bent inward to form the mounting flange 125, and the filter screen 800 is detachably mounted on the mounting flange 125.

[0106] According to an embodiment of the present application, an air purification member is further arranged at the machine body air inlet 101 and / or the machine body air outlet 102, that is, the air purification member can be arranged at the machine body air inlet 101 (not shown in the figure), or arranged at the machine body air outlet 102, or arranged at both the machine body air inlet 101 and the machine body air outlet 102. In order to save costs, an activated carbon cotton air purification member is arranged at the machine body air outlet 102 in the embodiment to further separate and filter oil fume. The air purification member can be in a plate shape, for example, the air purification member is a plate-shaped activated carbon cotton. By arranging the air purification member, the filtered oil fume is discharged into the room to form an air circulation, thereby saving the cost and time of opening a hole in the wall and arranging a long exhaust pipe. Compared with the external circulation mode of the range hood, the internal circulation mode of the range hood is very convenient to install and very convenient to disassemble.

[0107] It should be noted that, in order to facilitate the replacement of the air purification member, the air purification member can also be directly arranged at the machine body air inlet 101 and / or the machine body air outlet 102. For the machine body air outlet 102, the air purification member can be arranged at the side of the filter screen 800 facing the air outlet passage 104, that is, the inner side; for the machine body air inlet, the air purification member can be arranged at the side of the filter screen 800 away from the air inlet passage 103, that is, the outer side.

[0108] In the embodiment of the present application, the upper part of the body 100 is formed with an air outlet 102, and the lower part of the body 100 is formed with an air inlet 101, forming a lower air inlet and upper air outlet form; the air inlet channel 103 and the air outlet channel 104 are formed in the body 100, 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 communicates 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 air outlet 102 of the body, that is, the air outlet of the cross-flow fan 200 communicates with the air outlet 102 of the body through the air outlet channel 104, the air inlet channel 103 and the air outlet channel 104 are smoothly connected, so that the airflow flows smoothly. It should be noted that the "upper part" and "lower part" in the above are generally based on the installation state of the range hood.

[0109] In the embodiment, the air inlet channel 103 and the air outlet channel 104 form the flow channel of the oil fume, which needs to ensure that the flow channel has fewer corners to prevent the impeller of the cross-flow fan from causing performance degradation due to excessive local loss.

[0110] Since the cross-flow fan 200 has larger air volume, smaller volume and weight than the forward multi-wing centrifugal fan at the same noise volume, the range hood can reduce the weight and volume of the entire range hood by replacing the multi-wing centrifugal fan with the cross-flow fan 200.

[0111] It should be noted that the range hood in the embodiment, as shown in Figures 6 to 9 The air outlet 102 of the body is formed in the upper part of the front side wall of the body 100, the air inlet 101 of the body is formed in the lower part of the front side wall of the body 100, and the cross-flow fan 200 is arranged adjacent to the air inlet 101 of the body. Of course, it can be understood that the cross-flow fan 200 maintains a certain safety distance from the air inlet 101 of the body to avoid the influence of the fire source of the cooking bench on the cross-flow fan 200.

[0112] In one specific embodiment, the upper portion of the cross-flow fan 200 is provided with a main volute 300, which is fixed to the rear side wall of the machine body 100 through a volute support 340, so that no screws are needed in the assembly of the side surface, and no screws are visible, thereby making 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 as to form an air inlet channel 103 and an air outlet channel 104 inside the machine body 100. It should be noted that the "upper portion", "upper portion" and "lower portion" in the above are based on the installation state of the range hood, and the "front side wall" generally refers to the side of the machine body 100 facing the user, and the "rear side wall" generally refers to the side of the machine body 100 away from the user. The main volute 300 and the volute support 340 can be detachably connected through bolts or other connecting members, or can be integrally formed. The main volute 300 can be, but is not limited to, a single volute tongue structure or a double volute tongue structure. The following will be described taking the double volute tongue structure as an example.

[0113] In this embodiment, the first volute tongue 301 and the second volute tongue 302 are respectively formed at the two ends of the bottom surface of the main volute 300 along the circumferential direction of the cross-flow fan 200. The first volute tongue 301 and the inner wall of the machine body 100 form the outlet of the air inlet channel 103, and the second volute tongue 302 and the inner wall of the machine body 100 form the inlet of the air outlet channel 104. After the cross-flow fan 200 is started, a negative pressure area is formed near the air inlet 101 of the machine body, and the oil fume generated during cooking is quickly sucked into the air inlet channel 103 under the driving of the pressure difference. The oil fume in the air inlet channel 103 is also driven by the cross-flow fan 200 to be discharged from the air outlet 102 of the machine body along the air outlet channel 104, thereby facilitating to improve the efficiency of the fan and speed up the oil fume purification.

[0114] Taking the double volute tongue structure as an example, as shown in Figure 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 along the left-right direction, and the first guide plate 310 and the second guide plate 320 are respectively located on the front and rear sides of the third guide plate 330. That is, the first volute tongue 301 is formed at the connection between the third guide plate 330 and the first guide plate 310, and the second volute tongue 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, i.e. the first guide plate 310, and the inner wall of the machine body 100 form the air inlet channel 103, and the air inlet channel 103 extends from the air inlet 101 of the machine body to the first volute tongue 301, i.e. the first volute tongue 301 and the inner wall of the machine body 100 form the outlet of the air inlet channel 103; the rear side wall of the main volute 300, i.e. the second guide plate 320, and the inner wall of the machine body 100 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, i.e. the second volute tongue 302 and the inner wall of the machine body 100 form the inlet of the air outlet channel 104.

[0115] Thus, 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 during 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 discharged from the air outlet 102 of the body along the air outlet channel 104 under the driving of the cross-flow fan 200.

[0116] Further, as shown in the figure, the distance between the main volute 300 towards the side of the cross-flow fan 200 and the rotation center of the cross-flow fan 200 reaches a minimum value at the first volute tongue 301 and the second volute tongue 302, that is, the distance D between the first volute tongue 301 and the rotation center of the cross-flow fan 200 is equal to the distance between the second volute tongue 302 and the rotation center of the cross-flow fan 200, and the distance between any point of the main volute 300 between the first volute tongue 301 and the second volute tongue 302 and the rotation center of the cross-flow fan 200 is greater than D. Figure 14

[0117] In this embodiment, the included angle a of the first volute tongue 301 and the second volute tongue 302 with respect to the rotation center of the cross-flow fan 200, that is, the included angle a of the connecting line of the rotation center of the cross-flow fan 200 and the first volute tongue 301 and the second volute tongue 302 is not less than 30° and not greater than 160°. For example, the included angle a is in the range of 80°-120°.

[0118] Since the distance D between the first volute tongue 301 and the rotation center of the cross-flow fan 200 is equal to the distance between the second volute tongue 302 and the rotation center of the cross-flow fan 200, and the distance between any point of the main volute 300 towards the side of the cross-flow fan 200, that is, the third guide plate 330 between the first volute tongue 301 and the second volute tongue 302 and the rotation center of the cross-flow fan 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, thereby the area of the backflow area can be limited, and the occupied area of the backflow area to the air duct is reduced, so that not only the stability of the airflow in the air duct can be improved, but also the influence of the backflow area on the inlet airflow and the outlet airflow of the cross-flow fan 200 is reduced, and the fan efficiency is improved.

[0119] 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 tongue 301 and the second volute tongue 302, the distance between each point of the third guide plate 330 between the first volute tongue 301 and the second volute tongue 302 and the rotation center of the cross-flow fan 200 can be different or the same.

[0120] ​In order to avoid the above-mentioned phenomenon and ensure that the air flow in the air outlet channel 104 is smoothly discharged from the air outlet 102, the range hood further comprises an upper scroll 400, which is arranged in the air outlet channel 104 and above the air outlet 102, one end of the upper scroll 400 extends to the rear side wall of the body 100, and the other end of the upper scroll 400 extends to the upper edge of the air outlet 102. Figure 6 And Figure 7 As shown in Figs. 9 and 10, the upper scroll 400 is arranged in the air outlet channel 104 and above the air outlet 102, one end of the upper scroll 400 extends to the rear side wall of the body 100, and the other end of the upper scroll 400 extends to the upper edge of the air outlet 102.

[0121] Therefore, when the flue gas discharged from the cross-flow fan 200 flows upward along the air outlet channel 104, the flue gas will be blocked by the upper scroll 400 and will flow along the bottom surface of the upper scroll 400 to the air outlet 102. In order to better guide the air flow to the air outlet 102, the bottom surface of the upper scroll 400 is inclined upward from the end connected to the rear side wall of the body 100 to the end connected to the front side wall of the body 100. In addition, in order to reduce the flow resistance, the bottom surface of the upper scroll 400 is a smooth curved surface. For example, as shown in Fig. 11, the bottom surface of the upper scroll 400 is a curved surface that bulges upward. Figure 6

[0122] Of course, the bottom surface of the upper scroll 400 can also be composed of multiple planes. For example, the bottom surface of the upper scroll 400 comprises 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 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 air outlet 102, and the included angle between the first plane and the second plane is an obtuse angle, for example, not less than 120°.

[0123] In addition, the back plate 110 is provided with a mounting portion, and when the range hood is installed, the opening of the cover body is faced away from the user, and the range hood can be fixed to the wall by means of the mounting portion on the back plate 110. Since the cover body is covered on the back plate 110, and the back plate 110 faces the wall, the user can only see the outer wall of the cover body, that is, after the range hood is installed on the wall, only the cover body is exposed to the user, and the user cannot see the mounting portion of the back plate 110 and the connecting piece between the back plate 110 and the cover body, thereby not only improving the appearance of the whole machine, but also avoiding dirt accumulation.

[0124] ​The mounting portion can be a hanging hole 111 or a screw hole formed on the back plate 110, or a screw or a hook mounted on the back plate 110. Taking the hanging hole 111 as an example, an installer can first fix a hook on a wall, and then hang the machine body 100 on the hook, that is, the free end of the hook is inserted into the machine body 100 through the hanging hole 111 and hooked on the back plate 110. Considering the convenience of hanging, the size of the hanging hole 111 is usually larger than the size of the hook, that is, there is usually a gap between the hook and the hanging hole 111. Therefore, in order to ensure the closure of the air outlet channel 104 and prevent the airflow in the air outlet channel 104 from leaking through the above-mentioned gap, when the upper volute 400 is provided in the machine body 100, the hanging hole 111 is located in the projection area of the upper volute 400 on the back plate 110 or above the projection area, that is, the free end of the hook is located above the bottom surface of the upper volute 400 after being inserted into the machine body 100 through the hanging hole 111, and the airflow in the air outlet channel 104 cannot flow into the area above the upper volute 400 due to the blockage of the upper volute 400. In addition, such an arrangement can not only prevent the airflow in the air outlet channel 104 from leaking, but also prevent the hook inserted into the machine body 100 from affecting the flow of the airflow in the air outlet channel 104.

[0125] In addition, it should be noted that the cover body and the back plate 110 can be fixedly connected by welding, bonding or the like, or can be detachably connected. Taking the detachable connection as an example, the edges of the two sides of the cover body are bent towards each other to form flanges, the flanges are provided with first mounting portions, the back plate 110 is formed with second mounting portions corresponding to the first mounting portions, and the first mounting portions and the second mounting portions can be connected by clamping, hanging or the like. Taking hanging as an example, as shown in Figure 8 and Figure 11 , the first mounting portion is a hanging hole formed in the flange, and the second mounting portion is a hanging buckle 112 formed in the back plate 110, which is located on the side of the back plate 110 facing the cover body. Of course, the hanging hole can also be formed in the back plate 110, in which case the hanging buckle 112 is formed in the flange.

[0126] In addition, the cover body and the back plate 110 can also be connected by bolts. Specifically, the flange of the cover body is provided with a first through hole, and the back plate 110 is provided with a second through hole corresponding to the first through hole. When assembling the machine body 100, the threaded section of the bolt is first inserted from the inside to the outside through the corresponding first through hole, then the back plate 110 is placed on the opening of the cover body, and the threaded section of the bolt is inserted from the corresponding second through hole; finally, a nut is screwed 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 Figure 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 to the back plate 110 by hanging.

[0127] In addition, to improve the strength of the back plate 110, reinforcing ribs or reinforcing bosses can be stamped at the connection between the back plate 110 and the cover. The materials of the cover and the back plate 110 can be, but are not limited to, plastic or stainless steel. The cover can be integrally injection molded, bent from a single sheet, or welded or bonded from multiple sheets.

[0128] like Figure 1 and Figure 6 As shown, the curved panel 123 extends along the Archimedean spiral from the lower edge of the back plate 110 to the lower edge of the flat plate 122, that is, with... Figure 1 Based on the indicated orientation, the left or right view of the curved panel 123 is a curve, which is part of an Archimedean spiral. To improve aesthetics and prevent the body 100 from scratching the user, the curved panel 123 transitions smoothly to the flat panel 122. Thus, as... Figure 6 As shown, the entire unit 100 is teardrop-shaped. The advantages of this design are twofold: firstly, it utilizes the large space at the bottom and small space at the top of the teardrop structure, which not only ensures the installation of the cross-flow fan 200 within the unit 100 but also avoids wasting space within the unit 100, making the interior of the unit 100 more compact; secondly, it also improves aesthetics and reduces the space occupied by the unit 100.

[0129] In addition, the range hood also includes a motor 600 for driving the cross-flow fan 200 to rotate. Specifically, as... Figure 7 As shown, the motor 600 can be directly connected to the cross-flow fan 200, or it can be connected to the cross-flow fan 200 through a transmission mechanism. Taking the direct connection of the motor 600 to the cross-flow fan 200 as an example, the motor 600 is mounted on the back plate 110 sequentially via the motor bracket 700 and the bracket base 710. Combined with... Figure 12 and Figure 13 As shown, the motor bracket 700 includes two opposing 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 located between the two side plates 701 of the motor bracket 700. A motor end cover 720 is installed on the side of the side plate 701 facing away from the motor 600. A bushing 730 is installed on the side plate 701 of the motor bracket 700 adjacent to the cross-flow fan 200. The rotating shaft of the cross-flow fan 200 passes through the bushing 730 and connects to the output shaft of the motor 600. Since the motor 600 is mounted on the back plate 110 through the motor bracket 700 and the bracket base 710, there are no screws on the side of the machine during assembly, nor are there any observable screw structures. This makes the overall appearance of the machine smooth and beautiful, enhancing the perceived quality of the product.

[0130] It should be noted that the motor support 700 and the support seat 710 can be detachably connected through bolts or the like, or can be integrally formed. Conversely, if the motor 600 is indirectly connected with the cross-flow fan 200, the transmission mechanism can 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 includes a driving pulley, a driven pulley and a belt, the driving pulley is fixed to the output shaft of the motor 600, the driven pulley is fixed to the rotating shaft of the cross-flow fan 200, and the driving pulley is in transmission connection with the driven pulley through the belt. Thus, after the motor 600 is started, the driving pulley rotates synchronously, and the driving pulley drives the driven pulley to rotate through the belt, thereby driving the cross-flow fan 200 fixedly connected with the driven pulley to rotate. Since the installation mode of the gear chain mechanism is similar to that of the belt pulley mechanism, details are not described here. Compared with the case where the motor 600 is directly connected with the cross-flow fan 200, although the motor 600 is indirectly connected with the cross-flow fan 200 through the transmission mechanism, the aerodynamic performance of the cross-flow fan 200 can be improved, but the risk of whole machine vibration is also increased. Therefore, in the actual production process, the designer can select the connection mode of the motor 600 according to the actual demand of the user.

[0131] It should be noted that the range hood in the embodiment can have only one cross-flow fan 200, or can have multiple cross-flow fans 200. When the range hood includes multiple cross-flow fans 200, the multiple cross-flow fans 200 are arranged in sequence along the extension direction of the main volute 300. For example, taking the orientation shown in Figure 7 as the reference, when the range hood includes two cross-flow fans 200, the motor includes a double-shaft motor, the two cross-flow fans 200 are respectively arranged on the left and right sides of the double-shaft motor, one output shaft of the double-shaft motor is connected with the rotating shaft of one of the cross-flow fans 200, and the other output shaft of the double-shaft motor is connected with the rotating shaft of the remaining cross-flow fan 200.

[0132] In addition, as shown in Figures 8 to 10 , the machine body 100 is also provided with an openable and closable cover plate 500 which can be opened and closed at the machine body air inlet 101 and / or the machine body air outlet 102. The openable and closable cover plate 500 can be electrically opened and closed, or can be manually opened and closed. When the openable and closable cover plate 500 is electrically opened and closed, a driving component needs to be added, and the specific form of the driving component can be that of a motor driving a gear in engagement, to control the rotation of the openable and closable cover plate 500 to open and close, or can adopt a sliding opening and closing form, which is not limited in the embodiment. By controlling the opening degree of the openable and closable cover plate 500, the negative pressure at the machine body air inlet 101 can be controlled, so that the whole machine can be suitable for the kitchen cooking scene.

[0133] For example, the body air inlet 101, the opening and closing cover plate 500 can be rotatably connected with the body 100, or can be slidably arranged on the body 100. When the opening and closing cover plate 500 is rotatably connected with the body 100, one end of the opening and closing cover plate 500 can be rotatably fixed to the body 100 through a rotating shaft, so that the size of the body air inlet 101 can be adjusted by rotating the other end of the opening and closing cover plate 500. Similarly, when the opening and closing cover plate 500 is slidably connected with the body 100, one of the opening and closing cover plate 500 and the body 100 can be provided with a sliding groove, and the other can be provided with a sliding block, and the sliding block can be slidably embedded in the sliding groove, so that the size of the body air inlet 101 can be adjusted by pushing the opening and closing cover plate 500. It can be seen that, by arranging the opening and closing cover plate 500 at the body air inlet 101, the size of the body air inlet 101 can be adjusted to change the air inlet amount, and the body air inlet 101 can be closed when the cross-flow fan 200 is stopped to reduce dust falling and improve the appearance.

[0134] The installation mode of the opening and closing cover plate 500 at the body air outlet 102 is similar to the above, which will not be described here.

[0135] It should be noted that, for the body air inlet 101, as shown in Figure 9 when the opening and closing cover plate 500 is rotatably connected with the body 100, the opening and closing cover plate 500 is rotatably connected with the upper edge of the body air inlet 101. The advantages of this arrangement are: on the one hand, after the opening and closing cover plate 500 opens the body air inlet 101, the oil fume enters the body air inlet 101 from below the opening and closing cover plate 500, so that the oil fume cannot be quickly passed through the body air inlet 101 into the body 100 due to the shielding of the opening and closing cover plate 500; on the other hand, due to the presence of the opening and closing cover plate 500, when the oil fume generated during cooking rises to the opening and closing cover plate 500, the oil fume will be quickly introduced into the corresponding body air inlet 101 along the opening and closing cover plate 500 due to the blocking of the opening and closing cover plate 500. In addition, in order to achieve the effect of gathering 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.

[0136] In addition, in order 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 position of the motor, the range hood further comprises a driving member corresponding to the opening and closing cover plate 500, the driving member is installed on the body 100 and is linked with the motor, and the driving member can control the opening and closing of the opening and closing cover plate 500 according to the gear position of the motor.

[0137] Still taking the air inlet 101 of the machine body as an example, when the opening and closing cover plate 500 at the air inlet 101 of the machine body 100 is rotationally connected with the machine body 100, the driving member can be a driving motor connected with the rotation shaft of the opening and closing cover plate 500, and the driving motor is connected with the motor linkage; when the opening and closing cover plate 500 at the air inlet 101 of the machine body 100 is slidingly connected with the machine body 100, the driving member can be but is not limited to a micro air cylinder or a lead screw mechanism. If the driving member is a micro air cylinder, the cylinder body of the micro air cylinder is fixed to the machine body 100, the piston rod of the micro air cylinder extends along the height direction of the air inlet 101 of the machine body and is connected with the opening and closing cover plate 500, so that when the piston rod moves relative to the cylinder body, the opening and closing cover plate 500 can be driven to slide relative to the machine body 100, thereby opening or closing the corresponding air inlet 101 of the machine body. If the driving member is a lead screw mechanism, a sliding groove can be formed on the machine body 100, a sliding block is fixed on the opening and closing cover plate 500, the sliding block is slidingly embedded in the sliding groove, and the lead screw is rotatably installed on the machine body 100 and parallel to the sliding groove. The sliding block is provided with a threaded through hole matched with the threads of the lead screw, so that when the lead screw motor drives the lead screw to rotate, the sliding block moves along the lead screw, thereby driving the opening and closing cover plate 500 fixed thereto to slide relative to the machine body 100.

[0138] In the embodiment, the air outlet channel 104 is gradually expanded in 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 machine body. Therefore, not only can the air outlet resistance of the cross-flow fan 200 be reduced, but also the anti-back pressure capability can be improved.

[0139] In the embodiment, the air outlet channel 104 is gradually expanded in 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 machine body. Therefore, not only can the air outlet resistance of the cross-flow fan 200 be reduced, but also the anti-back pressure capability can be improved. Figure 7 Taking the orientation shown in the figure as a reference, the blades of the cross-flow fan 200 extend along the left-right direction, that is, along the width direction of the machine 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 behind the cross-flow fan 200. The air outlet channel 104 includes an arc segment 105 and a straight segment 106 which are connected with each other, and the arc segment 105 extends from the air outlet of the cross-flow fan 200 to the straight segment 106. The curvature radius of the end of the arc segment 105 away from the straight segment 106 is adapted to the shape of the cross-flow fan 200.

[0140] In the embodiment, the air outlet channel 104 is connected with the air outlet 102 of the machine body through a bend segment, and the bend segment includes a first arc surface 107 and a second arc surface 108 which are connected to form the bend segment. The curvature radius of the first arc surface 107 is greater than that of the second arc surface 108, or in other words, the curvature of the first arc surface 107 is greater than that of the second arc surface 108. The advantage of this design is that when the airflow flows through the bend segment, most of the airflow is mainly concentrated at the first arc surface 107. By setting the curvature radius of the first arc surface 107 to be larger, the airflow can smoothly pass through, the resistance of the airflow passing through is smaller, and the airflow flowability is better.

[0141] Of course, the air outlet passage 104 can also be formed only by the plurality of arc segments 105, that is, the straight segments 106 in the above can also be replaced by arc segments.

[0142] The embodiment adopts the cross-flow fan 200 as the airflow driving component, has small machine volume, larger air volume under the same noise volume, small machine weight, and is convenient to install. In addition, by using the cross-flow fan 200 as the airflow driving component of the range hood, the machine performance is more in line with the user's needs, the high back pressure working capacity that the user does not need is reduced, and the advantages of high flow, low noise, low weight, small volume and beauty are brought.

[0143] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; 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 of the embodiments of the present application.

[0144] 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 foregoing embodiments, those skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the technical solutions of the present application, and should be covered in the scope of claims of the present application.

Claims

1. A range hood, characterized in that, include: Organism; A cross-flow fan is disposed within 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 is greatest at the location where the cross-flow fan is located; The upper part of the body forms an air outlet, the lower part of the body forms an air inlet, and the air outlet is set at an angle upward; An air inlet channel is formed between the air inlet of the machine body and the air inlet of the cross-flow fan, and an air outlet channel is formed between the air outlet of the cross-flow fan and the air outlet of the machine body, and the air outlet channel gradually expands along the air outlet direction. The main volute is disposed inside the machine body and located above the cross-flow fan, and the main volute extends along the axial direction of the cross-flow fan; A first volute tongue and a second volute tongue are formed at both ends of the bottom surface of the main volute along the circumference of the cross-flow fan; the outlet of the air inlet channel is formed between the first volute tongue and the inner wall of the machine body, and the inlet of the air outlet channel is formed between the second volute tongue and the inner wall of the machine body. The distance between the side of the main volute facing the cross-flow fan and the rotation center of the cross-flow fan reaches a minimum at the first volute tongue and the second volute tongue. Both the air inlet and the air outlet of the machine body are equipped with filters.

2. The range hood according to claim 1, characterized in that, The cross-flow fan is located at the lower part of the body, and the thickness of the body gradually decreases from bottom to top.

3. The range hood according to claim 1, characterized in that, The cross-flow fan is located at the lower or upper part of the body, and the body has a uniform thickness from bottom to top.

4. The range hood according to claim 1, characterized in that, The cross-flow fan is located at the top of the body, and the thickness of the body gradually decreases from top to bottom.

5. The range hood according to claim 1, characterized in that, The air inlet of the machine body is set at an angle downward.

6. The range hood according to claim 1, characterized in that, The centerline of the air outlet of the unit is set at an angle to the vertical direction, and the angle is greater than 15°.

7. The range hood according to claim 5, characterized in that, The centerline of the air inlet of the machine body is set at an angle to the vertical direction, and the angle is not less than 20° and not more than 70°.

8. The range hood according to claim 1, characterized in that, The air inlet and air outlet of the machine body extend along the width direction of the machine body.

9. The range hood according to claim 1, characterized in that, The body includes a back plate and a cover. The cover has an opening and a cavity. The back plate covers the opening. The cover includes a front plate disposed opposite to the back plate and a side panel disposed between the front plate and the back plate.

10. The range hood according to claim 9, characterized in that, The air outlet of the unit is located on the front panel.

11. The range hood according to claim 9, characterized in that, 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. 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 unit is formed on the flat panel, and the air inlet of the unit is formed on the curved panel.

12. The range hood according to claim 9, characterized in that, 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. 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 unit is formed on the curved panel, and the air inlet of the unit is formed on the flat panel.

13. The range hood according to claim 9, characterized in that, 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 its upper end is connected to the lower edge of the inclined section. The bottom panel is inclined, and its lower end is connected to the upper edge of the flat panel. The lower edge of the bottom panel is connected to the back panel. The air outlet of the unit is formed in the inclined section, and the air inlet of the unit is formed in the bottom panel.

14. The range hood according to claim 9, characterized in that, The front panel includes a flat panel and a bottom panel. The flat panel is inclined from top to bottom away from the back panel. The bottom panel includes an inclined section and a horizontal section. The lower end of the flat panel is connected to the upper edge of the inclined section. The lower edge of the inclined section is connected to one side of the horizontal section. The other side of the horizontal section is connected to the back panel. The air outlet of the unit is formed on the flat panel, and the air inlet of the unit is formed on the inclined section.

15. The range hood according to claim 11, characterized in that, The upper end of the flat plate is connected to the upper end of the back plate to form a pointed tip.

16. The range hood according to claim 11, characterized in that, The upper end of the flat plate is connected to the upper end of the back plate by a top plate, which is horizontally positioned.

17. The range hood according to claim 1, characterized in that, An air purification component is also provided at the air inlet and / or air outlet of the machine body.

18. The range hood according to claim 1, characterized in that, The machine body is equipped with an openable and closable cover that can be opened and closed at the air inlet of the machine body.

19. The range hood according to claim 1, characterized in that, The air outlet channel includes an arc-shaped section and a straight section, with the arc-shaped section extending from the air outlet of the cross-flow fan to the straight section.

20. The range hood according to claim 19, characterized in that, The air outlet channel is connected to the air outlet of the body through a bend. The bend includes a first arc surface and a second arc surface, and the radius of curvature of the first arc surface is greater than the radius of curvature of the second arc surface.

21. The range hood according to claim 18, characterized in that, The air outlet duct and the cross-flow fan are arranged in a staggered manner in the horizontal direction.

22. The range hood according to claim 1, characterized in that, The air outlet channel is provided with an upper volute, which is located above the air outlet of the body. One end of the upper volute extends to the rear side wall of the body, and the other end extends to the upper edge of the air outlet of the body.

23. The range hood according to claim 22, characterized in that, The bottom surface of the upper volute slopes upward from the end where it connects to the rear side wall of the body to the end where it connects to the front side wall of the body.

24. The range hood according to claim 9, characterized in that, The back plate is provided with a mounting part. When the upper volute is provided in the body, the mounting part is a mounting hole formed on the back plate. The mounting hole is located in the projection area of ​​the upper volute on the back plate or above the projection area.

25. The range hood according to any one of claims 1-4, characterized in that, It also includes a motor for driving the cross-flow fan to rotate, the motor being mounted on the rear side wall of the body in sequence via a motor bracket and a bracket base.

26. The range hood according to claim 1, characterized in that, 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 volute tongue is formed at the connection between the first guide plate and the third guide plate, and the second volute tongue is formed at the connection between the second guide plate and the third guide plate.

27. The range hood according to claim 1, characterized in that, The main volute is fixed to the rear side wall of the machine body by a volute bracket.

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