CN219809951U - Fume exhaust fan - Google Patents

Abstract

The utility model provides a range hood, comprising: fan, be located the lower cavity of furred ceiling below, at least part be located the quick-witted case of furred ceiling top and connect the pipeline of cavity and quick-witted case down, the fan includes: the volute is arranged in the case; the impeller is arranged in the volute, and the axis of the impeller is arranged in a non-horizontal manner; the motor is connected with the impeller to drive the impeller to rotate; the volute comprises a coaming plate, an upper side plate and a lower side plate, wherein the coaming plate is arranged around the periphery of the impeller, the upper side plate is arranged above the impeller, and the lower side plate is arranged below the impeller; the volute is provided with an air inlet and an air outlet, and the air inlet is arranged on the lower side plate; the lower side plate at least comprises a protruding part, the protruding part protrudes downwards compared with other parts of the lower side plate, and the protruding part, the upper side plate and the coaming form an air outlet; the impeller comprises a plurality of blades which are distributed in the circumferential direction; the embodiment of the utility model can improve the air quantity and the air pressure of the fan and ensure the low noise and the smoke exhaust effect of the range hood on the basis that the chassis is at least partially arranged above the suspended ceiling.

Description

Fume exhaust fan

Technical Field

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

Background

Install the fan of lampblack absorber to the top in furred ceiling space, be favorable to the influence of noise reduction to indoor space, in some regions, the furred ceiling space in house is less, how be convenient for install the fan of lampblack absorber and quick-witted case at least partially in the furred ceiling space, and guarantee the amount of wind pressure of fan to guarantee the low noise and the effect of discharging fume of lampblack absorber, become the technical problem who needs to solve urgently.

Disclosure of Invention

The embodiment of the utility model aims to provide a range hood, which can improve the air quantity and the air pressure of a fan and ensure the low noise and the smoke exhaust effect of the range hood on the basis that a chassis is at least partially arranged above a suspended ceiling.

The above object of the present utility model can be achieved by the following technical solutions:

the utility model provides a range hood, comprising: fan, be located the lower cavity of furred ceiling below, at least part be located the quick-witted case of furred ceiling top and connect the lower cavity with the pipeline of machine case, the fan includes:

the volute is arranged in the case;

the impeller is arranged in the volute, and the axis of the impeller is arranged in a non-horizontal mode;

the motor is connected with the impeller to drive the impeller to rotate;

the volute comprises a coaming, an upper side plate and a lower side plate, wherein the coaming is arranged around the impeller, the upper side plate is arranged above the impeller, and the lower side plate is arranged below the impeller;

the volute is provided with an air inlet and an air outlet, and the air inlet is arranged on the lower side plate;

the lower side plate at least comprises a protruding part, the protruding part protrudes downwards compared with other parts of the lower side plate, and the protruding part, the upper side plate and the coaming form the air outlet;

The impeller includes a plurality of circumferentially distributed blades.

In a preferred embodiment, the chassis includes a floor proximate to the suspended ceiling and a ceiling distal from the suspended ceiling in a height direction; the upper side plate is the top plate or is attached to the top plate.

In a preferred embodiment, the protruding portion is formed by punching or bending the lower side plate downward.

In a preferred embodiment, the protruding portion includes a first protruding portion and a second protruding portion in sequence along an air outlet direction of the scroll case.

In a preferred embodiment, the first projection has a first side remote from the air inlet; the first bulge is provided with a second side part close to the air inlet; the first side portion is lower than the second side portion in a height direction, and the second side portion extends downward to the first side portion in a direction toward the first side portion.

In a preferred embodiment, the second protruding portion is located downstream of the first protruding portion, the second side portion extends downward along a line direction of the volute to form the second protruding portion, and the first protruding portion, the second protruding portion, other portions of the lower side plate, the upper side plate, and the coaming form the air outlet.

In a preferred embodiment, the first protrusion is a slope and the second protrusion is a curved surface.

In a preferred embodiment, the second side portion extends in the direction of the line of the scroll casing and downward to be the same height as the first side portion to form the second projection.

In a preferred embodiment, the blade comprises a blade section radially adjacent to the axis and in a height direction adjacent to the air inlet, the blade section comprising a first blade section and a second blade section arranged in sequence from top to bottom in the height direction, the first blade section being arranged obliquely relative to the vertical direction in a direction away from the axis of the impeller; and the included angle between the second blade segment and the vertical direction is smaller than the included angle between the first blade segment and the vertical direction.

In a preferred embodiment, a transition blade segment is provided between the first blade segment and the second blade segment, the transition blade segment comprising an arcuate blade segment.

In a preferred embodiment, the second blade section is arranged vertically.

In a preferred embodiment, the chassis includes a floor proximate to the suspended ceiling and a ceiling distal from the suspended ceiling in a height direction; the upper side plate is the top plate, and the coaming is connected to the top plate to form the volute; or, the upper side plate is attached to the top plate, and the upper side plate is connected with the top plate.

In a preferred embodiment, when the upper side plate is attached to the top plate, the upper side plate is formed by bending an upper portion of the coaming.

In a preferred embodiment, the chassis includes a floor proximate to the suspended ceiling and a ceiling distal from the suspended ceiling in a height direction; the upper side plate is the top plate or is attached to the top plate; the motor is arranged in the case and connected with the top plate, and the impeller is connected with the motor.

In a preferred embodiment, the motor comprises a stator part and a rotor part, the stator part being connected to the top plate, the impeller being connected to the rotor part.

In a preferred embodiment, the rotor part comprises a rotor barrel surrounding the stator part, the rotor barrel being provided with a barrel flange part; the impeller includes an impeller disc connected to the barrel flange portion.

In a preferred embodiment, the stator part surrounds the rotor part, and a connection part connected to the rotor part is provided at the center of the impeller.

In a preferred embodiment, the stator part includes an end cap fixed to the top plate and a stator positioned below the end cap, the stator being fixed to the end cap.

In a preferred embodiment, the chassis includes a floor proximate to the suspended ceiling and a ceiling distal from the suspended ceiling in a height direction; the upper side plate is the top plate or is attached to the top plate; the top plate is provided with a wire outlet hole, and wires of the motor pass through the wire outlet hole to pass through to the outer side of the top plate.

In a preferred embodiment, the electric wire is connected to a stopper provided between an upper portion of the motor and the top plate, and the stopper is used for restricting a stretching amount of the electric wire.

In a preferred embodiment, the motor comprises a stator part and a rotor part, the impeller is connected to the rotor part, the stator part comprises an end cover fixed to the top plate and a stator positioned below the end cover, the stator is fixed to the end cover, and the limiting piece is arranged between the end cover and the top plate.

In a preferred embodiment, a pressing plate is provided on the outer side of the top plate, and presses the electric wire against the top plate.

In a preferred embodiment, the case comprises a case body and a connecting piece, the pipeline is connected to the connecting piece, a smoke inlet is formed in the side portion of the case body, the connecting piece is installed in the smoke inlet, and no hole is formed between the connecting piece and the lower edge of the smoke inlet.

In a preferred embodiment, a clamping part is arranged at the lower end of the connecting piece, and the clamping part is clamped with the lower edge of the smoke inlet.

In a preferred embodiment, the part of the connecting piece above the clamping part is fixed on the other edge of the smoke inlet.

In a preferred embodiment, a sealing gasket is arranged between the lower edge of the smoke inlet and the clamping part.

In a preferred embodiment, the portion of the engagement portion located inside the case is inclined in a top-down direction into the case.

In a preferred embodiment, a transition part is provided between the part of the clamping part located outside the box body and the part located inside the box body, and the transition part is provided with reinforcing ribs.

The utility model has the characteristics and advantages that:

in the range hood, the fan and the chassis can be at least partially installed above the suspended ceiling through the impellers with the non-horizontal axes, the installation suitability is improved, the low-noise effect is guaranteed, meanwhile, the air outlet cross-sectional area of the air outlet is increased through the protruding portions formed on the lower side plates, and the effect of improving the air volume and the air pressure can be still achieved under the conditions that the axes of the impellers are arranged non-horizontally and the distance between the upper side plates of the spiral case and the top plate of the chassis is relatively close.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a range hood provided by the utility model;

fig. 2 is a schematic structural diagram of a fan and a case in the range hood provided by the utility model;

FIG. 3 is a top perspective view of the blower and chassis shown in FIG. 2;

FIG. 4 is a vertical cross-sectional view of the blower and chassis shown in FIG. 2;

FIG. 5 is a schematic diagram of the connection of the top plate and the motor and impeller in the fan and housing shown in FIG. 2;

FIG. 6 is an enlarged view of a portion of FIG. 4 at A;

FIG. 7 is a partial enlarged view at B in FIG. 5;

fig. 8 is a schematic diagram of a fan and a chassis in the range hood provided by the utility model, wherein an upper side plate and a top plate are omitted;

fig. 9 is a side view of a fan and a case in the range hood provided by the utility model;

fig. 10 is a schematic structural view of a volute in the range hood provided by the utility model;

FIG. 11 is a side view of the volute of FIG. 10;

FIG. 12 is a front view of the volute of FIG. 10;

fig. 13 is a schematic view of a scroll casing in a range hood according to the present utility model with an upper side plate omitted;

fig. 14 is a schematic view of a volute in a range hood provided by the utility model, in which an upper side plate is omitted, and in which another view angle is shown;

fig. 15 is a top view of a lower side plate in the range hood provided by the utility model;

FIG. 16 is a front view of the lower side plate shown in FIG. 15;

FIG. 17 is an enlarged view of a portion of FIG. 13 at E;

fig. 18 is a front view of a fan and a case in the range hood provided by the utility model;

FIG. 19 is an enlarged view of a portion of F in FIG. 18;

FIG. 20 is a schematic view of the mating of the blades with the lower side plate of the blower of FIG. 18;

FIG. 21 is a schematic view of the impeller of the blower of FIG. 18;

FIG. 22 is a partial cross-sectional view of the top plate and motor and impeller of the blower and chassis of FIG. 2;

fig. 23 is a schematic diagram illustrating connection between an air outlet seat and an air duct in the range hood provided by the utility model;

FIG. 24 is a schematic view of the housing and motor and impeller of FIG. 2;

FIG. 25 is a partial cross-sectional view of the chassis shown in FIG. 2;

FIG. 26 is a schematic diagram illustrating the connection between the housing and the connector in the chassis shown in FIG. 24;

Fig. 27 is a partial enlarged view at D in fig. 26;

FIG. 28 is a schematic view of the connector in the chassis shown in FIG. 24;

fig. 29 is a partial enlarged view at C in fig. 22.

Reference numerals illustrate:

11. a lower cavity; 12. a pipe;

2. a blower;

30. an impeller; 301. an axis of the impeller; 31. an impeller disc; 32. a blade;

33. leaf segments; 331. a first leaf segment; 333. a transition leaf segment; 334. arc leaf segments; 332. a second leaf segment;

34. a main body section;

40. a motor; 41. a stator part; 411. a stator; 412. an end cap; 42. a rotor section; 421. a rotor cylinder; 422. a barrel burring part; 423. a rotor shaft; 424. a magnetic shoe;

43. an electric wire; 44. a limiting piece;

50. a volute; 51. coaming plate; 511. a burring part; 52. an upper side plate;

53. a lower side plate; 531. an oil tank; 54. a protruding portion;

55. a first projection; 551. a first side portion; 552. a second side portion;

56. a second projection; 561. an air outlet transition part; 57. a flat plate portion;

58. an air inlet; 581. hemming; 59. an air outlet; 591. the air outlet direction;

60. a chassis; 61. a bottom plate; 62. a top plate; 621. a wire outlet hole; 622. a limit groove;

63. a case; 64. a smoke inlet; 641. the lower edge of the smoke inlet; 65. a connection port; 66. a support;

70. A connecting piece; 71. a clamping part; 711. an inner clamping part; 712. an outer clamping part; 713. a transition section; 714. reinforcing ribs; 72. a sealing gasket;

81. an air outlet seat; 83. and (5) an air pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a range hood, as shown in figures 1-5 and 8-9, comprising: fan 2, be located the lower cavity 11 of furred ceiling below, be located at least partly the quick-witted case 60 of furred ceiling top and connect lower cavity 11 and the pipeline 12 of quick-witted case 60, fan 2 includes: the volute 50, the impeller 30 and the motor 40, wherein the volute 50 is arranged in the case 60; the impeller 30 is disposed within the volute 50, and the axis 301 of the impeller is disposed non-horizontally, the impeller 30 comprising a plurality of circumferentially distributed blades 32; the motor 40 is connected with the impeller 30 to drive the impeller 30 to rotate; the volute 50 comprises a coaming 51 surrounding the impeller 30, an upper side plate 52 positioned above the impeller 30 and a lower side plate 53 positioned below the impeller 30; the volute 50 is provided with an air inlet 58 and an air outlet 59, and the air inlet 58 is arranged on the lower side plate 53; the lower side plate 53 includes at least a protruding portion 54, the protruding portion 54 protrudes downward compared with other portions of the lower side plate 53, and the protruding portion 54, the upper side plate 52, and the surrounding plate 51 form an air outlet 59.

In the range hood, the fan 2 and the chassis 60 can be at least partially installed above the suspended ceiling through the impeller 30 with the non-horizontal axis, the installation adaptability is improved, the low noise effect is guaranteed, meanwhile, the air outlet cross-sectional area of the air outlet 59 is increased through the convex part 54 which is formed at least on the lower side plate 53, and the effect of improving the air quantity and the air pressure can still be achieved under the condition that the axis 301 of the impeller is arranged non-horizontally and the distance between the upper side plate 52 of the volute 50 and the top plate 62 of the chassis 60 is relatively close, so that the embodiment of the utility model can improve the air quantity and the air pressure of the fan 2 on the basis that the chassis 60 is at least partially installed above the suspended ceiling, and ensure the low noise and the smoke discharging effect of the range hood.

When the range hood is installed, the fan 2 and the case 60 can be partially or fully arranged above the suspended ceiling, the case 60 comprises a bottom plate 61 close to the suspended ceiling and a top plate 62 far away from the suspended ceiling in the height direction, and in an embodiment, the upper side plate 52 is the top plate 62 or the upper side plate 52 is attached to the top plate 62, so that the fan 2 and the case 60 are at least partially positioned above the suspended ceiling.

The upper side plate 52 of the volute 50 is integrated with the top plate 62 of the case 60, so that no gap or only a small gap exists between the upper side of the volute 50 and the top plate 62, thus, the thickness of the case 60 is approximately equal to the sum of the thickness of the volute 50 and the distance between the lower side plate 53 and the bottom plate 61, the thickness of the case 60 and the whole thickness of the fan 2 are reduced, the fan 2 is conveniently and completely installed above a suspended ceiling or the size of the fan 2 exceeding the suspended ceiling is reduced, and the installation difficulty is reduced for the condition of small space of the suspended ceiling, so that the installation adaptability of the range hood is improved, and the technical effect of low noise is ensured. Meanwhile, in this embodiment, by providing the protruding portion 54 on the lower side plate 53, the air outlet cross-sectional area of the air outlet 59 is increased, so that the problem of small air volume and air pressure is solved on the basis of ensuring that the overall thickness of the chassis 60 and the fan 2 is kept relatively small.

The air outlet 59 is an air outlet channel with a preset length, and comprises a space surrounded by the protruding portion 54, the upper side plate 52 and the coaming 51.

The protruding portion 54 forms an air outlet 59, and the protruding portion 54 protrudes downward along the air outlet direction 591. The protruding portion 54 and other portions of the lower side plate 53 may be integrally formed, or the protruding portion 54 and other portions of the lower side plate 53 may be separately formed and connected together by splicing or the like. Preferably, the protruding portion 54 is formed by punching or bending the lower side plate 53 downwards, so as to ensure smoothness of downward protruding deformation of the protruding portion 54, facilitate outward discharge of air flow in the volute 50 along the protruding portion in the air outlet direction 591, ensure smoothness of air outlet, and promote air volume and air pressure.

As shown in fig. 8 to 15, along the air outlet direction 591 of the volute 50, the protruding portion 54 sequentially includes a first protruding portion 55 and a second protruding portion 56, and the air flow in the volute 50 sequentially flows through the first protruding portion 55 and the second protruding portion 56 along the air outlet direction 591, and the shape of the first protruding portion 55 and the shape of the second protruding portion 56 may be the same or different, for example: the first protruding portion 55 is an inclined plane, and the second protruding portion 56 is a curved surface; alternatively, the first protruding portion 55 is a curved surface, and the second protruding portion 56 is an inclined plane; alternatively, the first and second projections 55 and 56 are each inclined planes; alternatively, the first and second protruding portions 55 and 56 are both curved surfaces; in the case where the first projection 55 and the second projection 56 are both inclined planes, the slopes of the two with respect to the horizontal plane may be the same or different. The lower side of the air outlet 59 is gradually inclined downwards through the first convex part 55 and the second convex part 56, so that on one hand, the air outlet section of the air outlet 59 is gradually enlarged, and smooth and steady flow of air flow is facilitated; on the other hand, the first protruding portion 55 and the second protruding portion 56 are connected, so that the protruding portion 54 protrudes downwards, the protruding portion 54 is convenient to achieve a preset height protruding downwards, the volute 50 is easier to form, and the process difficulty is reduced.

The first protrusion 55 and the second protrusion 56 may be formed in one step, or may be formed in steps, for example: the first and second protruding portions 55 and 56 may be formed by one-step stamping through an integrated mold; alternatively, the first protruding portion 55 is molded by a mold, and then the second protruding portion 56 is molded by a mold. As shown in fig. 11 and 13, the air outlet 59 may have a rectangular cross section.

Further, the first protrusion 55 has a first side 551 distal from the air inlet 58, and a second side 552 proximal to the air inlet 58; as shown in fig. 13-17, the first side 551 is lower than the second side 552 in the height direction, and the second side 552 extends downward to the first side 551 in a direction toward the first side 551, so that the first protrusion 55 is bent downward, which is beneficial for the airflow to smoothly flow along the second side 552 toward the first side 551.

The second projection 56 is located downstream of the first projection 55, namely: in the air outlet direction 591, the first projection 55 is located upstream and the second projection 56 is located downstream. Further, the second side 552 extends downward along the line direction of the scroll case 50 to form a second protruding portion 56, and the first protruding portion 55, the second protruding portion 56, and other portions of the lower side plate 53, the upper side plate 52, and the shroud 51 form an air outlet 59. As shown in fig. 11 and 15, the first and second convex portions 55 and 56 extend in the direction of the line of the scroll case 50 in the projection on the horizontal plane; in addition, along the air outlet direction 591, the second side portion 552 protrudes downwards to the first side portion 551, the second protruding portion 56 also protrudes downwards, the first protruding portion 55, the second protruding portion 56, other portions of the lower side plate 53, the upper side plate 52 and the coaming 51 together form an air outlet 59, air flows through the first protruding portion 55 and the second protruding portion 56 in sequence, the flow section of the air flow is gradually increased, smooth flow of the air flow is guaranteed, and the air quantity and the air pressure are improved; on the other hand, the first protruding portion 55 and the second protruding portion 56 are ensured to be easier to mold, and the process difficulty is reduced. The shroud 51 extends in the direction of the line of the scroll 50.

In an embodiment, the first protruding portion 55 is an inclined surface, the second protruding portion 56 is a curved surface, the second side portion 552 extends downward along a straight line to the first side portion 551 along a line direction of the volute 50, the protruding portion 54 continues to extend downward and along a curve to form the second protruding portion 56, so that an air outlet cross section of the air outlet 59 is increased to a larger area, a flow cross section of air flow is smoothly increased, and stability of air flow is ensured.

Further, the second side 552 extends downward along the line direction of the volute 50 to the same height as the first side 551 to form a second protrusion 56, so that the lowest point of the first protrusion 55 is equal to the lowest point of the second protrusion 56, and thus, the side, close to the air inlet 58, of the second protrusion 56 continues to protrude downward, and the side, close to the coaming, of the second protrusion 56 remains horizontal, which is beneficial to better improving the air volume and pressure.

Specifically, the lowest point of the first projection 55 is located at the lower end of the first side 551, and the first side 551 is in close proximity to the shroud of the volute. As shown in fig. 17, the outer end of the second protruding portion 56 is further connected with a flat plate portion 57, the flat plate portion 57 is parallel to the main body portion of the lower side plate 53, and the first protruding portion 55, the second protruding portion 56, the flat plate portion 57, other portions of the lower side plate 53, the upper side plate 52, and the shroud plate 51 form an air outlet 59.

Further, the second protruding portion 56 includes an air outlet transition portion 561, as shown in fig. 15 and 17, the second side portion 552 extends downward along the line direction of the volute 50 to form the air outlet transition portion 561, and continues to extend to form other portions of the second protruding portion 56, and the first protruding portion 55, the air outlet transition portion 561, other portions of the second protruding portion 56, other portions of the lower side plate 53, the upper side plate 52, and the shroud 51 together form the air outlet 59. The shape of the air outlet transition part 561 is different from that of the first protruding part 55, and the shape of the air outlet transition part 561 can be different from that of other parts of the second protruding part 56, so that smooth transition from the first protruding part 55 to the second protruding part 56 is facilitated, smooth flow of forming and air flow is facilitated, and disturbance to the air flow is reduced.

In an embodiment, as shown in fig. 10 to 11, the lower side plate 53 is provided with an oil groove 531 containing oil, and the depth of the oil groove 531 may be smaller than the height of the protrusion 54 protruding downward.

The inventors have made improvements to blade 32: the vane 32 includes a vane segment 33 radially near the axis and in the height direction near the air intake 58, and as shown in fig. 18 to 21, the vane segment 33 includes a first vane segment 331 and a second vane segment 332 disposed in this order from top to bottom in the height direction, the first vane segment 331 being disposed obliquely with respect to the vertical direction in a direction away from the axis 301 of the impeller; as shown in fig. 20, the included angle H between the second blade segment 332 and the vertical direction is smaller than the included angle G between the first blade segment 331 and the vertical direction, and the first blade segment 331 extends downward at a relatively larger included angle, so that the lower end of the first blade segment 331 has a larger distance from the air inlet 58 in the radial direction, and the second blade segment 332 can avoid the lower side plate 53 of the volute, so that on one hand, the effective area of the blade 32 is increased, and the air volume is improved; on the other hand, the interference between the blades 32 and the lower side plate 53 of the volute 50 is avoided, the installation difficulty of the impeller 30 is reduced, and the impeller 30 is ensured to rotate stably and reliably in the volute 50.

The center of the lower side plate 53 is perforated to form the air intake port 58, and as shown in fig. 18 to 20, the air intake port 58 is folded upward to form the rolled edge 581, and the rolled edge 581 is cylindrical, and the cylindrical rolled edge 581 is constructed as the air intake port 58. The upper end of the second blade segment 332 is approximately the height of the top surface of the crimp 581, and preferably the upper end of the second blade segment 332 is slightly above the top surface of the crimp 581.

The first blade segments 331 are inclined outwards along the direction from top to bottom so as to gradually deviate from the center, the first blade segments 331 can be in a straight line shape or a curve shape, and when the first blade segments 331 are in a curve shape, the included angle between the first blade segments 331 and the vertical direction is the included angle between the connecting line of the upper end and the lower end of the first blade segments 331 and the vertical direction. When the first blade segment 331 is in a straight line, the first blade segment 331 is obliquely arranged relative to the vertical direction, i.e. the included angle G between the first blade segment 331 and the vertical direction is always greater than zero. The second blade segment 332 may also be linear or curved, and when the second blade segment 332 is curved, the included angle H between the second blade segment 332 and the vertical direction is the included angle between the connecting line of the upper end and the lower end of the second blade segment 332 and the vertical direction. The blade 32 further comprises a body section 34 above the blade section 33, the body section 34 being vertically arranged.

Further, a transition blade segment 333 is provided between the first blade segment 331 and the second blade segment 332, as shown in fig. 20, the transition blade segment 333 includes an arc-shaped blade segment 334 to connect the first blade segment 331 and the second blade segment 332 more smoothly. Further, the angle between the transition blade segment 333 and the vertical direction is larger than the angle between the second blade segment 332 and the vertical direction, and the transition blade segment 333 is inclined radially outwards by a relatively large distance, so as to enlarge the distance between the blade 32 and the curled edge 581 and ensure that the blade 32 has a relatively large effective area.

Considering that there is a portion where the second blade segment 332 coincides with the rolled edge 581 in the height direction, the second blade segment 332 is preferably a straight line, specifically, the second blade segment 332 is inclined outward in the top-down direction, or the second blade segment 332 is disposed vertically. More preferably, the second blade segment 332 is vertically disposed, that is, the included angle H between the second blade segment 332 and the vertical direction is equal to zero, so that the second blade segment 332 and the curled edge 581 always keep a relatively large distance in the radial direction, the blade 32 and the curled edge 581 are ensured not to interfere, and the manufacturing of the blade 32 is facilitated.

The upper side plate 52 of the volute 50 and the top plate 62 of the housing 60 may be integrated in a variety of ways. When the upper side plate 52 is the top plate 62, as shown in fig. 4 and 5, the shroud 51 is connected to the top plate 62 to form the scroll 50, the upper side plate 52 and the top plate 62 are of the same structure, and the top plate 62, the shroud 51 and the lower side plate 53 define the inner cavity of the scroll 50. Specifically, the coaming 51 and the top plate 62 may be directly formed into one body by bending, stamping, casting, or the like; alternatively, the shroud 51 may be formed separately from the top plate 62 and then joined together by welding or screws or the like. Preferably, in the case that the shroud 51 is formed separately from the top plate 62, as shown in fig. 4 and 6, a flange portion 511 is provided at the upper end of the shroud 51, and the flange portion 511 is attached to the top plate 62 to increase the contact area between the shroud 51 and the top plate 62, and the flange portion 511 and the top plate 62 are connected by means of screws or welding, so that the shroud 51 and the top plate 62 are connected. The burring 511 may extend inwardly from the shroud 51 along the top plate 62, or may extend outwardly from the shroud 51 along the top plate 62; the burring 511 may be annular, or the upper end of the shroud 51 may be provided with a plurality of burring 511, the plurality of burring 511 being distributed at intervals along the annular shape.

When the upper side plate 52 is attached to the top plate 62, the upper side plate 52 is connected to the top plate 62, the upper side plate 52 and the top plate 62 may be tightly attached to each other, or a smaller preset gap may be provided, and the upper side plate 52 and the top plate 62 may be connected by screws or welding.

Considering that the upper side plate 52 is the top plate 62 or the upper side plate 52 is attached to the top plate 62, the upper side of the air outlet 59 is difficult to expand upwards, so in the embodiment of the utility model, the protruding portion 54 is provided on the lower side plate 53, so that on one hand, the overall thickness of the chassis 60 and the fan 2 is ensured to be smaller, so that the chassis 60 is conveniently mounted at least partially above the ceiling, and on the other hand, the air outlet cross-sectional area of the air outlet 59 can be increased, and the air volume and the air pressure can be increased.

The upper side plate 52 and the coaming 51 may be variously constructed. In one embodiment, the upper side plate 52 is formed separately from the shroud 51 and then joined together by welding or screws or the like. In another embodiment, the upper side plate 52 and the coaming 51 are directly formed into a whole, for example, by stamping, bending or casting; more preferably, the upper side plate 52 is formed by bending the upper portion of the shroud plate 51, which is advantageous in simplifying the structure of the scroll case 50, securing structural strength and reducing weight.

In an embodiment, the motor 40 is disposed in the chassis 60 and connected to the top plate 62, the impeller 30 is connected to the motor 40, the top plate 62 bears the weights of the volute 50, the motor 40 and the impeller 30, and the motor 40 drives the impeller 30 to rotate during operation, so that the stress structure is optimized, reliable operation of the impeller 30 and the motor 40 is ensured, and the operation life of the fan 2 is prolonged.

Specifically, in the case where the upper side plate 52 is the top plate 62, the motor 40 may be directly connected to the top plate 62, i.e., the motor 40 is in direct contact with the top plate 62; alternatively, the motor 40 may be indirectly coupled to the top plate 62, such as: the motor 40 is connected to the carrier, which is then connected to the top plate 62. In the case where the upper side plate 52 is attached to the top plate 62, the motor 40 may be connected to the upper side plate 52, and the motor 40 is connected to the top plate 62 through the upper side plate 52; alternatively, the upper side plate 52 may be provided with a through hole in which the upper portion of the motor 40 is disposed, and the motor 40 may be connected to the top plate 62 without passing through the upper side plate 52.

As shown in fig. 5 and 7, the motor 40 includes a stator 41 and a rotor 42, the stator 41 is connected to a top plate 62, the impeller 30 is connected to the rotor 42, the rotor 42 rotates relative to the stator 41 to rotate the impeller 30 together, and the rotor 42 and the stator 41 can be connected by a bearing.

In an embodiment, the rotor portion 42 includes a rotor cylinder 421, the rotor cylinder 421 surrounding the stator portion 41, the rotor cylinder 421 being provided with a cylinder burring portion 422; the impeller 30 comprises the impeller disc 31, the impeller disc 31 is connected with the barrel flanging part 422, the gravity of the impeller 30 is borne by the barrel flanging part 422, the torque is transmitted, the assembly is convenient, the connection is more reliable, and the impeller 30 and the rotor barrel 421 are rotating parts, so that the embodiment can ensure more stable transmission motion. As shown in fig. 7, the rotor portion 42 includes a rotor shaft 423 and a magnetic shoe 424, the rotor shaft 423 is provided at the center of the stator portion 41, the rotor cylinder 421 is connected to the lower end of the rotor shaft 423, and the magnetic shoe 424 is provided on the outer wall of the rotor shaft 423 or the inner wall of the rotor cylinder 421.

In another embodiment, the stator portion 41 surrounds the rotor portion 42, the center of the impeller 30 is provided with a connection portion connected with the rotor portion 42, the rotor portion 42 is connected with the impeller 30 through the connection portion, and torque is transmitted through the connection portion, and various structural forms of the connection portion may be provided, for example: the connection portion includes a disk body, and the rotor portion 42 extends to interface with the disk body and is connected by a screw; the connecting portion comprises a frame body, the frame body comprises a plurality of connecting rods extending outwards from the center, the outer ends of the connecting rods are fixedly connected with the impeller 30, and the inner ends of the connecting rods are connected with the rotor portion 42.

The stator part 41 includes a stator 411, the stator 411 includes a structure that generates a magnetic field such as a coil or a magnetic shoe, and the stator 411 drives the rotor part 42 to rotate by the magnetic field. In one embodiment, the stator 411 may be directly connected to the top plate 62. In another embodiment, the stator portion 41 includes an end cap 412 fixed on the top plate 62 and a stator 411 located below the end cap 412, the stator 411 is fixed on the end cap 412, the end cap 412 plays a role of bearing the gravity of the motor 40, and during production, the stator 411 and the rotor portion 42 can be mounted on the end cap 412 first, and then the end cap 412 is fixed on the top plate 62, so as to realize the assembly of the motor 40 and the case 60, and facilitate the manufacture and assembly of the motor 40 and the case 60.

As shown in fig. 22, the motor 40 is connected to an electric wire 43, and electric power or a control signal is transmitted through the electric wire 43. Since the lower side of the motor 40 is the air inlet 58 of the scroll case 50, the electric wire 43 is generally led out from the upper portion of the motor 40.

In the related art, radial grooves are provided between the end cap 412 and the top plate 62 of the motor 40, through which the electric wires 43 are led out of the casing 60 in the radial direction, and this embodiment can achieve the lead-out of the electric wires 43, but the provided radial grooves occupy axial space, which is disadvantageous for reducing the thickness of the fan 2.

In an embodiment, as shown in fig. 22 and 29, the top plate 62 is provided with a wire outlet hole 621, and the wires 43 of the motor 40 pass through the wire outlet hole 621 to the outside of the top plate 62, so that the occupation of the axial space is reduced, and the thickness of the fan 2 is reduced.

Further, the wire 43 is connected with a stopper 44 disposed between the upper portion of the motor 40 and the top plate 62, the stopper 44 is used for limiting the stretching amount of the wire 43, the lower side of the stopper 44 can be abutted against the motor 40, and the upper side of the stopper 44 can be abutted against the inner surface of the top plate 62, so that the stopper 44 and the wire 43 are limited to move axially relative to the motor 40.

As shown in fig. 29 and 7, the motor 40 includes a stator portion 41 and a rotor portion 42, the impeller 30 is connected to the rotor portion 42, the stator portion 41 includes an end cap 412 fixed to the top plate 62 and a stator 411 located below the end cap 412, the stator 411 is fixed to the end cap 412, the stopper 44 is disposed between the end cap 412 and the top plate 62, the end cap 412 restricts downward movement of the stopper 44, the top plate 62 restricts upward movement of the stopper 44, and restriction of the stopper 44 and the wire 43 is achieved. Specifically, the stopper 44 may be a stopper plate. To better mount the limiting plate, the inner wall of the top plate 62 may be provided with a limiting groove 622, and the limiting plate is disposed in the limiting groove 622.

In an embodiment, the outside of roof 62 is provided with the clamp plate, and the clamp plate compresses tightly electric wire 43 in roof 62, through the clamp plate, draws forth the electric wire 43 to the outside part of roof 62 and carries out spacingly, avoids electric wire 43 to shift, is favorable to guaranteeing fan 2 steady operation.

The lower side plate 53 of the scroll case 50 is provided with an air inlet hole, and as shown in fig. 4, a gap is provided between the lower side plate 53 and the bottom plate 61, and the flue gas in the case 60 flows into the scroll case 50 through the air inlet hole on the lower side plate 53. As shown in fig. 2 and 23, the range hood includes an air duct 83; the case 60 is provided with an air outlet seat 81, an air pipe 83 is partially fixed on the air outlet seat 81, the air pipe 83 is communicated with the inner cavity of the volute 50, and the flue gas entering the volute 50 is discharged outwards through the air pipe 83.

In some embodiments, the thickness of the volute of the fan is not greater than the first thickness, and the diameter of the impeller of the fan is not less than the first diameter, so that the thickness of the fan is controlled, and the fan is ensured to have larger air volume and air pressure while the range hood is convenient to install.

Further, the first thickness includes 200mm, and this lampblack absorber of guarantee easy to assemble is convenient for hide the fan in whole top of furred ceiling. The first diameter comprises 255mm, so that the fan has larger air volume and air pressure, and the effect of the range hood for sucking oil smoke is guaranteed. Preferably, the first thickness comprises 200mm and the first diameter comprises 255mm.

In one embodiment, as shown in fig. 24-26 and 28, the cabinet 60 includes a cabinet 63 and a connector 70, the pipe 12 is connected to the connector 70, a smoke inlet 64 is provided at a side of the cabinet 63, the connector 70 is mounted to the smoke inlet 64, and a hole-free connection is provided between the connector 70 and a lower edge 641 of the smoke inlet. The pipeline 12 is installed to the smoke inlet 64 through the connecting piece 70, and when the pipeline 12 is installed, the pipeline 12 can be connected to the connecting piece 70 first, and then the connecting piece 70 is installed to the smoke inlet 64, so that the pipeline 12 and the case 60 can be assembled conveniently.

If the connection member 70 is connected to the lower edge 641 of the smoke inlet by a screw, the screw is easily positioned to leak during use, so that the oil storage space of the case 60 can be limited below the screw. In this embodiment, the connection member 70 is connected with the lower edge 641 of the smoke inlet in a hole-free manner, so that the lower edge 641 of the smoke inlet has no leakage risk, and the lower edge 641 of the smoke inlet can reliably prevent oil from flowing out, thereby improving the oil storage space.

Further, the lower end of the connecting piece 70 is provided with a clamping part 71, the clamping part 71 is clamped with the lower edge 641 of the smoke inlet, the connecting piece 70 is connected with the lower edge 641 of the smoke inlet in a clamping manner, and the lower edge 641 of the smoke inlet is not perforated, so that the hole-free connection is realized. The portion of the connecting member 70 located above the clamping portion 71 is fixed to the other edge of the smoke inlet 64, and since the portion of the connecting member 70 located above the clamping portion 71 does not affect the oil storage, the portion of the connecting member 70 located above the clamping portion 71 and the other edge of the smoke inlet 64 may be fixed by screws or the like.

Further, a sealing gasket 72 is disposed between the lower edge 641 of the smoke inlet and the clamping portion 71 to improve the tightness between the connector 70 and the smoke inlet 64, so as to avoid oil leakage. The sealing pad 72 can be only arranged at the lower edge 641 of the smoke inlet, the sealing pad 72 can be not arranged at other edges of the smoke inlet 64, oil leakage can be avoided through the lower edge, and the oil storage space can be effectively utilized. Preferably, the gasket 72 is annular, that is, the edges of the smoke inlet 64 are matched with the connecting piece 70 through the gasket 72, so that the tightness of the case 60 is improved, and floating smoke seepage is reduced. The gasket 72 is preferably disposed outside the rim of the smoke inlet 64, which also facilitates installation of the gasket 72 while maintaining a sealing effect.

As shown in fig. 27 to 28, the engaging portion 71 includes an inner engaging portion 711 located inside the case 63 and an outer engaging portion 712 located outside the case 63. During installation, the lower edge 641 of the smoke inlet can be inserted between the outer clamping part 712 and the inner clamping part 711, then the part, above the clamping part 71, of the connecting piece 70 is fixed with the other edges of the smoke inlet 64, similar to the lever principle, so that the inner clamping part 711 has a tendency to tilt outwards, and the inner clamping part 711 is tightly abutted to the inner wall of the lower edge 641 of the smoke inlet, and the firmness of clamping is ensured.

Further, the inner clamping part 711 is obliquely arranged in the box 63 from top to bottom, so that the distance between the inner wall of the lower edge 641 of the smoke inlet and the inner clamping part 711 is gradually enlarged from top to bottom, which is beneficial to guiding the oil liquid falling onto the clamping part 71, and the oil liquid flows downwards along the inner clamping part 711 to the oil storage space in the box 60, so that the oil liquid is prevented from flowing outwards along the clamping part 71 due to the siphoning phenomenon; on the other hand, the inner clamping portion 711 can play a guiding role when assembled, so that the lower edge of the oil inlet is conveniently inserted between the inner clamping portion 711 and the outer clamping portion 712, and the connecting piece 70 and the box 63 are conveniently assembled.

As shown in fig. 27, a transition portion 713 is provided between the outer clamping portion 712 and the inner clamping portion 711, the transition portion 713 is provided with a reinforcing rib 714, the reinforcing rib 714 plays a role in enhancing the strength of the clamping portion 71, preferably, the reinforcing rib 714 extends to the inner clamping portion 711 and the outer clamping portion 712, the reinforcing rib 714 can play a role in guiding flow, and oil flows into the tank 63 along the reinforcing rib 714.

The shape of the connector 70 is adapted to the mouth 64. For example, as shown in fig. 24, the smoke inlet 64 is rectangular, and accordingly, the connector 70 is a rectangular frame. In an embodiment, the case 60 is rectangular, the smoke inlet 64 is disposed on one side of the case 60, the air outlet seat 81 is disposed on the other side of the case 60, and the side provided with the air outlet seat 81 is also provided with the connection port 65, so as to facilitate assembly, debugging and maintenance of the internal structure of the case 60 through the connection port 65. Further, the connection port 65 is also connected with a supporting member 66, the air outlet seat 81 is mounted on the supporting member 66, and the connection structure between the supporting member 66 and the connection port 65 may be substantially the same as the connection structure between the connection member 70 and the smoke inlet 64.

The axis 301 of the impeller of the range hood provided by the utility model is not horizontally arranged. Further, the axis 301 of the impeller is arranged vertically or near to the vertical direction, that is, the fan 2 adopts a transverse mode, and the fan 2 is convenient to be installed above the suspended ceiling due to the small thickness of the fan 2 in the range hood, so that the installation adaptability is improved. The axis 301 of the impeller is arranged close to the vertical direction, and the included angle between the axis 301 of the impeller and the vertical direction is not more than 45 degrees. The mounting adaptability of the range hood provided by the utility model can be improved from 70% to more than 90%, and the air quantity is 22.5m ³ The ratio of the total length/min can be raised to 25m ³ And/min, the wind pressure can be increased to 1000Pa from 850 Pa.

The foregoing is merely a few embodiments of the present utility model and those skilled in the art may make various modifications or alterations to the embodiments of the present utility model in light of the disclosure herein without departing from the spirit and scope of the utility model.

Claims (28)

1. A range hood, comprising: fan, be located the lower cavity of furred ceiling below, at least part be located the quick-witted case of furred ceiling top and connect the lower cavity with the pipeline of machine case, its characterized in that, the fan includes:

the volute is arranged in the case;

The impeller is arranged in the volute, and the axis of the impeller is arranged in a non-horizontal mode;

the motor is connected with the impeller to drive the impeller to rotate;

the volute comprises a coaming, an upper side plate and a lower side plate, wherein the coaming is arranged around the impeller, the upper side plate is arranged above the impeller, and the lower side plate is arranged below the impeller;

the volute is provided with an air inlet and an air outlet, and the air inlet is arranged on the lower side plate;

the lower side plate at least comprises a protruding part, the protruding part protrudes downwards compared with other parts of the lower side plate, and the protruding part, the upper side plate and the coaming form the air outlet;

the impeller includes a plurality of circumferentially distributed blades.

2. The range hood of claim 1, wherein the range hood is configured to,

the chassis comprises a bottom plate close to the suspended ceiling and a top plate far away from the suspended ceiling in the height direction;

the upper side plate is the top plate or is attached to the top plate.

3. A range hood according to claim 2, characterized in that,

the protruding portion is formed by punching or bending the lower side plate downwards.

4. The range hood of claim 1, wherein the range hood is configured to,

The convex parts sequentially comprise a first convex part and a second convex part along the air outlet direction of the volute.

5. The range hood of claim 4, wherein the range hood further comprises a hood body,

the first bulge is provided with a first side part far away from the air inlet;

the first bulge is provided with a second side part close to the air inlet;

the first side portion is lower than the second side portion in a height direction, and the second side portion extends downward to the first side portion in a direction toward the first side portion.

6. The range hood of claim 5, wherein the range hood further comprises a hood body,

the second bulge is located the low reaches of first bulge, the second lateral part is followed the molded line direction of spiral case and extends downwards in order to form the second bulge, first bulge, second bulge with other parts of lower side board, the upper side board, the bounding wall forms the air outlet.

7. The range hood of claim 6, wherein the range hood further comprises a hood body,

the first protruding portion is an inclined surface, and the second protruding portion is a curved surface.

8. The range hood of claim 6, wherein the range hood further comprises a hood body,

the second side portion extends downward along the line direction of the volute to be the same height as the first side portion so as to form the second protruding portion.

9. The range hood of claim 1, wherein the range hood is configured to,

the blade comprises a blade section which is radially close to the axis and is close to the air inlet in the height direction, the blade section comprises a first blade section and a second blade section which are arranged in sequence from top to bottom in the height direction,

the first blade section is obliquely arranged in a direction away from the axis of the impeller relative to the vertical direction;

and the included angle between the second blade segment and the vertical direction is smaller than the included angle between the first blade segment and the vertical direction.

10. The range hood of claim 9, wherein the range hood is configured to,

a transition blade segment is arranged between the first blade segment and the second blade segment, and the transition blade segment comprises an arc-shaped blade segment.

11. The range hood of claim 9, wherein the range hood is configured to,

the second blade section is vertically disposed.

12. A range hood according to any one of claims 2 to 11, characterized in that,

the chassis comprises a bottom plate close to the suspended ceiling and a top plate far away from the suspended ceiling in the height direction; the upper side plate is the top plate, and the coaming is connected to the top plate to form the volute;

Or, the upper side plate is attached to the top plate, and the upper side plate is connected with the top plate.

13. The range hood of claim 12, wherein the range hood further comprises a hood body,

when the upper side plate is attached to the top plate, the upper side plate is formed by bending the upper portion of the coaming.

14. A range hood according to any one of claims 2 to 11, characterized in that,

the chassis comprises a bottom plate close to the suspended ceiling and a top plate far away from the suspended ceiling in the height direction;

the upper side plate is the top plate or is attached to the top plate;

the motor is arranged in the case and connected with the top plate, and the impeller is connected with the motor.

15. The range hood of claim 14, wherein the range hood is configured to,

the motor comprises a stator part and a rotor part, wherein the stator part is connected with the top plate, and the impeller is connected with the rotor part.

16. The range hood of claim 15, wherein the range hood further comprises a hood body,

the rotor part comprises a rotor cylinder which surrounds the stator part, and the rotor cylinder is provided with a cylinder flanging part; the impeller includes an impeller disc connected to the barrel flange portion.

17. The range hood of claim 15, wherein the range hood further comprises a hood body,

the stator part surrounds the rotor part, and a connecting part connected with the rotor part is arranged at the center of the impeller.

18. The range hood of claim 15, wherein the range hood further comprises a hood body,

the stator part comprises an end cover fixed on the top plate and a stator positioned below the end cover, and the stator is fixed on the end cover.

19. A range hood according to any one of claims 2 to 11, characterized in that,

the chassis comprises a bottom plate close to the suspended ceiling and a top plate far away from the suspended ceiling in the height direction;

the upper side plate is the top plate or is attached to the top plate;

the top plate is provided with a wire outlet hole, and wires of the motor pass through the wire outlet hole to pass through to the outer side of the top plate.

20. The range hood of claim 19, wherein the range hood further comprises a hood body,

the electric wire is connected with a limiting piece arranged between the upper part of the motor and the top plate, and the limiting piece is used for limiting the stretching amount of the electric wire.

21. The range hood of claim 20, wherein the range hood further comprises a hood body,

the motor comprises a stator part and a rotor part, the impeller is connected with the rotor part, the stator part comprises an end cover fixed on the top plate and a stator positioned below the end cover, the stator is fixed on the end cover, and the limiting piece is arranged between the end cover and the top plate.

22. The range hood of claim 19, wherein the range hood further comprises a hood body,

the outside of roof is provided with the clamp plate, the clamp plate will the electric wire compress tightly in the roof.

23. A range hood according to any one of claims 2 to 11, characterized in that,

the case comprises a case body and a connecting piece, the pipeline is connected to the connecting piece, a smoke inlet is formed in the side portion of the case body, the connecting piece is installed in the smoke inlet, and the connecting piece is connected with the lower edge of the smoke inlet in a hole-free mode.

24. The range hood of claim 23, wherein the range hood further comprises a hood body,

the lower extreme of connecting piece is provided with joint portion, joint portion with the lower border joint of inlet.

25. The range hood of claim 24, wherein the range hood further comprises a hood body,

the part of the connecting piece above the clamping part is fixed on the other edges of the smoke inlet.

26. The range hood of claim 24, wherein the range hood further comprises a hood body,

a sealing gasket is arranged between the lower edge of the smoke inlet and the clamping part.

27. The range hood of claim 24, wherein the range hood further comprises a hood body,

the clamping part is positioned in the box body and is obliquely arranged in the box body along the direction from top to bottom.

28. The range hood of claim 24, wherein the range hood further comprises a hood body,

the clamping part is positioned at the outer part of the box body and the inner part of the box body, and a transition part is arranged between the clamping part and the inner part of the box body and is provided with reinforcing ribs.