CN219624133U - Fume exhaust fan - Google Patents

Abstract

The utility model provides a range hood, which comprises a smoke collecting cavity, wherein the smoke collecting cavity comprises a lower smoke collecting cavity and an upper smoke collecting cavity positioned above the lower smoke collecting cavity, the upper smoke collecting cavity is provided with a first air inlet, the lower smoke collecting cavity is provided with a second air inlet, the upper part of the second air inlet is provided with a guide plate, and the guide plate is at least partially positioned in the lower smoke collecting cavity and is used for at least increasing the negative pressure of the second air inlet, so that the technical problem that the range hood in the prior art is insufficient in smoke absorbing effect and easy to escape is solved.

Description

Fume exhaust fan

Technical Field

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

Background

The range hood is generally provided with an upper air inlet and a lower air inlet, and negative pressure is generated in the range hood under the action of the fan, so that the oil smoke generated by a kitchen range or a cooker below the range hood is sucked through the air inlets. However, the range hood in the prior art has the problem of insufficient oil smoke suction effect, and the oil smoke is easy to escape.

Disclosure of Invention

The utility model aims to provide a range hood, which aims to solve the technical problem that the range hood in the prior art is insufficient in oil fume suction effect and oil fume is easy to escape.

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

the utility model provides a range hood, which comprises a smoke collecting cavity, wherein the smoke collecting cavity comprises a lower smoke collecting cavity and an upper smoke collecting cavity positioned above the lower smoke collecting cavity, the upper smoke collecting cavity is provided with a first air inlet, the lower smoke collecting cavity is provided with a second air inlet, the upper part of the second air inlet is provided with a guide plate, and the guide plate is at least partially positioned in the lower smoke collecting cavity and is used for at least increasing the negative pressure of the second air inlet.

In a preferred embodiment, the guide plate extends downward from above in the height direction and is inclined toward the inside of the lower smoke collecting chamber.

In a preferred embodiment, a first condensation plate is further arranged at the lower part of the second air inlet, extends upwards from below in the height direction and is inclined towards the interior of the lower smoke collecting cavity.

In a preferred embodiment, the vertical projection of the lower portion of the guide plate coincides at least partially with the first condensation plate; alternatively, the vertical projection of the guide plate at least partially coincides with the first condensation plate.

In a preferred embodiment, an oil cup is arranged at the lower end of the lower smoke collecting cavity, and the vertical projection of the lower part of the guide plate is at least partially overlapped with the oil cup; or, the lower end of the lower smoke collecting cavity is provided with an oil cup, and the vertical projection of the guide plate is at least partially overlapped with the oil cup.

In a preferred embodiment, two sides of the smoke collecting cavity are provided with smoke blocking pieces for preventing the diffusion of the smoke.

In a preferred embodiment, the smoke barrier comprises a smoke barrier plate and a connecting piece, wherein the smoke barrier plate is connected to the connecting piece, and the connecting piece is arranged on the side part of the smoke collecting cavity.

In a preferred embodiment, the connecting piece is provided with a first clamping part, the smoke collecting cavity is provided with a second clamping part, and the first clamping part is clamped with the second clamping part in a clamping manner.

In a preferred embodiment, the opening of the second clamping portion is downward, and the first clamping portion can slide from bottom to top to enter the second clamping portion.

In a preferred embodiment, the connector is provided with a stop which abuts the smoke collecting cavity to prevent lateral movement of the connector relative to the smoke collecting cavity; and/or the second clamping part is provided with a stop block, and the stop block is abutted with the side part of the connecting piece so as to prevent the connecting piece from transversely moving relative to the smoke collecting cavity.

In a preferred embodiment, the connector is further connected to the smoke collecting chamber by a screw.

In a preferred embodiment, the connector comprises a first connection part connected with the side part of the lower smoke collecting cavity and a second connection part connected with the side part of the upper smoke collecting cavity;

the first connecting part is connected with the lower smoke collecting cavity in the clamping mode and/or the screw, and/or the second connecting part is connected with the upper smoke collecting cavity in the clamping mode and/or the screw.

In a preferred embodiment, the front end of the upper smoke collecting cavity is further provided with a smoke blocking member for preventing the diffusion of smoke, and the lower end of the smoke blocking member extends downwards to at least 2CM protruding from the front end.

In a preferred embodiment, the vertical projection of the first air inlet at least partially coincides with a fume generating area below the range hood.

In a preferred embodiment, an oil guide plate is arranged in the upper smoke collecting cavity, and the oil guide plate is arranged above the first air inlet.

In a preferred embodiment, the oil guide plate extends obliquely from top to bottom in the height direction toward the inside of the smoke collecting chamber.

In a preferred embodiment, the lower smoke collecting cavity is provided with a second condensing plate, and the second air inlet is arranged below the second condensing plate; the guide plate is connected to the inner side of the second condensing plate.

In a preferred embodiment, the guide plate comprises a connecting part, and the connecting part is attached to the inner wall of the second condensation plate.

In a preferred embodiment, a filter screen assembly is arranged in the lower smoke collecting cavity, the filter screen assembly comprises a filter screen frame and a filter screen connected with the filter screen frame, and the filter screen frame is connected with the inside of the smoke collecting cavity; the connecting part is clamped between the filter screen frame and the inner wall of the second condensing plate.

In a preferred embodiment, the distal end of the guide plate is provided with a bend.

In a preferred embodiment, the range hood comprises a top side double-sided range hood, the upper smoke collection chamber comprises a top smoke collection chamber, and the lower smoke collection chamber comprises a side smoke collection chamber.

In a preferred embodiment, the ratio of the air inlet area of the second air inlet to the air inlet area of the first air inlet ranges from 1:2 to 1: 7.

The utility model has the characteristics and advantages that:

when the range hood operates, the first air inlet and the second air inlet form negative pressure, and under the action of the guide plate, the negative pressure of the second air inlet is increased, so that more oil smoke is sucked into the second air inlet, in addition, the oil smoke which is not sucked into the second air inlet is deflected to the smoke collecting cavity in the upward movement process, and the movement path of the oil smoke is also influenced by the suction force of the negative pressure at the second air inlet, so that the part of oil smoke is sucked into the first air inlet more easily, the escape of the oil smoke is reduced, the oil smoke suction effect is enhanced, and the user experience is improved.

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 front view of FIG. 1;

FIG. 3 is a cross-sectional view taken along the B-B direction of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic connection diagram of a filter screen assembly, a guide plate and a second condensation plate in the range hood provided by the utility model;

fig. 6 is a schematic flow diagram of a part of airflow outside the range hood according to the present utility model;

fig. 7 is a schematic structural view of a smoke blocking member in the range hood provided by the utility model;

fig. 8 is an assembly schematic diagram of the range hood provided by the utility model after omitting part of components;

FIG. 9 is an enlarged view of a portion of FIG. 8 at C;

fig. 10 is an exploded view of the range hood provided by the utility model after omitting parts;

FIG. 11 is a partial enlarged view of D in FIG. 10;

fig. 12 is a schematic structural view of a guide plate in the range hood provided by the utility model.

Reference numerals illustrate:

1. a smoke collecting cavity; 2. a fume channel;

10. an upper smoke collecting cavity; 101. a top smoke collecting cavity; 102. the front end of the upper smoke collecting cavity; 11. a first air inlet; 12. an oil guide plate;

20. a lower smoke collecting cavity; 201. A side smoke collecting cavity; 21. A second air inlet;

22. a second condensing plate; 23. An oil cup;

30. a guide plate; 31. A connection part; 32. A bending portion;

40. a first condensing plate;

50. a screen assembly; 51. a filter screen frame; 52. a filter screen;

60. a smoke blocking member; 61. a smoke baffle; 62. a connecting piece; 621. a first connection portion; 622. a second connecting portion;

71. a first clamping part; 72. a second clamping part; 721. an opening;

73. a stop block;

80. and a smoke-blocking member.

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, which is shown in fig. 1-4, and comprises a smoke collecting cavity 1, wherein the smoke collecting cavity 1 comprises a lower smoke collecting cavity 20 and an upper smoke collecting cavity 10 positioned above the lower smoke collecting cavity 20, the upper smoke collecting cavity 10 is provided with a first air inlet 11, the lower smoke collecting cavity 20 is provided with a second air inlet 21, the upper part of the second air inlet 21 is provided with a guide plate 30, and the guide plate 30 is at least partially positioned in the lower smoke collecting cavity 20 and is used for at least increasing the negative pressure of the second air inlet 21.

When the range hood operates, the first air inlet 11 and the second air inlet 21 form negative pressure, the negative pressure of the second air inlet 21 is increased under the action of the guide plate 30, so that more oil smoke is sucked into the second air inlet 21, and as shown by a single arrow in fig. 6, the oil smoke which is not sucked into the second air inlet 21 is deflected to the smoke collecting cavity 1 more due to the suction effect of the negative pressure at the second air inlet 21 in the moving path, so that the part of oil smoke is sucked into the first air inlet 11 more easily, the escape of the oil smoke is reduced, the oil smoke sucking effect is enhanced, and the user experience is improved.

The guide plate 30 forms a barrier to a partial region of the second air inlet 21 to reduce the effective air inlet area of the second air inlet 21, thereby increasing the negative pressure of the second air inlet 21, and the guide plate 30 may be arranged in various manners. In one embodiment, as shown in fig. 4, the guide plate 30 extends downwards in the height direction and inclines downwards to the inside of the smoke collecting cavity 20, by arranging the guide plate 30, the negative pressure of the second air inlet 21 is increased, meanwhile, the guide plate 30 can also play a role in guiding condensed oil drops, and the oil drops can flow downwards along the guide plate 30 to drop into the smoke collecting cavity 1; moreover, the guide plate 30 also adjusts the air inlet direction at the second air inlet 21, as shown by the dotted arrow in fig. 6, so that the oil smoke can more smoothly enter the smoke collecting cavity 1 through the second air inlet 21 under the action of negative pressure suction.

The lower portion of the second air inlet 21 is further provided with a first condensing plate 40, and as shown in fig. 4, the first condensing plate 40 extends upward from below in the height direction and is inclined toward the inside of the lower smoke collecting chamber 20. The first condensing plate 40 is matched with the guide plate 30 to guide and adjust the air flow at the second air inlet 21, and the oil fume enters the first condensing plate 40 from bottom to top after entering the second air inlet 21 and continuously flows to the upper fume collecting cavity 10; the first condensing plate 40 also condenses the oil smoke entering through the second air inlet 21, so as to promote the oil smoke to condense and guide the oil to flow downwards to the bottom of the lower smoke collecting cavity 20. The bottom of the lower plenum 20 may be provided with an oil cup 23, and oil may flow along the first condensation plate 40 and drop into the oil cup 23.

The vertical projection of the guide plate 30 coincides at least partially with the first condensation plate 40, i.e.: the guide plate 30 and the first condensing plate 40 are projected onto a horizontal plane in a vertical direction, respectively, in which vertical projection there is a coincidence of the guide plate 30 with the first condensing plate 40, for example, an upper portion of the guide plate 30 coincides with the first condensing plate 40; and/or, the middle of the guide plate 30 coincides with the first condensing plate 40; and/or, the lower portion of the guide plate 30 coincides with the first condensing plate 40.

Further, the vertical projection of the lower portion of the guide plate 30 is at least partially overlapped with the first condensation plate 40, so that the oil flowing along the guide plate 30 can drop onto the first condensation plate 40 after dropping from the lower portion of the guide plate, and the length of the guide plate 30 extending into the smoke collecting cavity 1 is smaller, so that a user can wipe the guide plate 30 and the lower portion of the guide plate 30 conveniently, and the lower portion of the guide plate 30 is prevented from being too far inwards in the smoke collecting cavity 1 to be convenient to wipe.

In one embodiment, the distal end of the guide plate 30 is provided with a bend 32 to prevent a user from being cut by the distal end of the guide plate 30 when it is wiped. More preferably, as shown in fig. 12, the bent portion 32 is bent upward.

The lower end of the lower smoke collecting chamber 20 is provided with an oil cup 23. The vertical projection of the guide plate 30 coincides at least partially with the oil cup 23, for example, in the vertical projection, the upper portion of the guide plate 30 coincides with the oil cup 23; and/or, the middle part of the guide plate 30 coincides with the oil cup 23; and/or the lower portion of the guide plate 30 coincides with the oil cup 23. Further, the lower end of the lower smoke collecting cavity 20 is provided with an oil cup 23, and the vertical projection of the lower part of the guide plate 30 is at least partially overlapped with the oil cup 23, so that the oil flowing along the guide plate 30 can drop into the oil cup 23 after dropping from the lower part of the guide plate, or can flow to the oil cup 23 along the first condensing plate 40 after falling into the first condensing plate 40.

In an embodiment, two sides of the smoke collecting cavity 1 are provided with smoke blocking pieces 60 for preventing the diffusion of the smoke, the smoke blocking pieces 60 can prevent the outward movement of the smoke, as shown in fig. 1 and 2, the smoke collecting cavity 1 is matched with the smoke blocking pieces 60 on two sides to form a smoke collecting area, the smoke collecting effect is achieved on the smoke, the escape of the smoke is reduced, and the escape preventing effect of the smoke ventilator is further enhanced.

For easy manufacture and assembly, the smoke barrier 60 includes a smoke barrier 61 and a connector 62, and as shown in fig. 1 and 7, the smoke barrier 61 is connected to the connector 62, and the connector 62 is installed at a side of the smoke collecting chamber 1. The smoke baffle 61 and the connecting piece 62 can be manufactured respectively, the smoke baffle 61 is usually made of smoke baffle glass, and the difficulty of arranging the connecting structure on the glass is considered to be large, so that the smoke baffle 61 is connected with the smoke collecting cavity 1 through the connecting piece 62, and the manufacturing and assembling difficulty is reduced. In one embodiment, the connector 62 may be made of a resin material; the smoke barrier 61 may be a smoke barrier glass, or may be made of other materials.

The connecting piece 62 and the side part of the smoke collecting cavity 1 can be detachably connected. In an embodiment, the connecting piece 62 is provided with a first clamping portion 71, the smoke collecting cavity 1 is provided with a second clamping portion 72, and the first clamping portion 71 is clamped to the second clamping portion 72 in a clamping manner. The first clamping portion 71 and the second clamping portion 72 are matched in a clamping mode to position and fix the side portion of the smoke collecting cavity 1 and the connecting piece 62. Specifically, as shown in fig. 8-11, the first clamping portion 71 is a clamping tongue, the second clamping portion 72 includes a clamping groove, and the clamping tongue can move into the clamping groove and form a clamping connection with the clamping groove; it may also be: the first engaging portion 71 is an engaging groove, and the second engaging portion 72 is an engaging tongue.

Taking the first clamping portion 71 as a clamping tongue, an embodiment in which the second clamping portion 72 includes a clamping groove is taken as an example. Further, the opening 721 of the second clamping portion 72 faces downward, the first clamping portion 71 can slide from bottom to top to enter the second clamping portion 72, the first clamping portion 71 and the second clamping portion 72 form surface-to-surface fit, and the first clamping portion 71 is prevented from moving relative to the smoke collecting cavity 1 in the front-to-back direction, so that the front-to-back position of the connecting piece 62 is located. In the case that the first clamping portion 71 is a clamping groove and the second clamping portion 72 is a clamping tongue, the opening 721 of the first clamping portion 71 is disposed upward, which may also have a similar effect, and will not be described herein.

In an embodiment, the connecting member 62 is provided with a stop 73, the stop 73 abutting the smoke collecting chamber 1 to prevent the connecting member 62 from moving laterally relative to the smoke collecting chamber 1, thereby positioning the lateral position of the connecting member 62. In another embodiment, the second clamping portion 72 is provided with a stop 73, and the stop 73 abuts against the side portion of the connecting piece 62 to prevent the connecting piece 62 from moving transversely relative to the smoke collecting cavity 1, so that the transverse position of the connecting piece 62 can be positioned. In another embodiment, the connecting member 62 and the second clamping portion 72 are respectively provided with a stop 73, as shown in fig. 11, the stop 73 on the connecting member 62 abuts against the stop 73 on the smoke collecting chamber 1 to prevent the connecting member 62 from moving laterally relative to the smoke collecting chamber 1, so as to locate the lateral position of the connecting member 62.

In an embodiment, the connecting piece 62 is further connected with the smoke collecting cavity 1 through a screw, so that the connecting piece 62 and the smoke collecting cavity 1 are kept fixed, and the firmness of mounting the smoke blocking piece 60 in the smoke collecting cavity 1 is improved.

As shown in fig. 7, the smoke barrier 60 has a substantially triangular shape. The connection member 62 includes a first connection portion 621 connected to a side portion of the lower smoke collecting chamber 20 and a second connection portion 622 connected to a side portion of the upper smoke collecting chamber 10, and the first connection portion 621 and the second connection portion 622 are integrally connected and formed in an L shape. The first connecting portion 621 and the lower smoke collecting cavity 20 may be connected by a clamping manner and/or a screw, and the second connecting portion 622 and the upper smoke collecting cavity 10 may be connected by a clamping manner and/or a screw, where the clamping manner may adopt a clamping structure in which the first clamping portion 71 and the second clamping portion 72 are matched, or may adopt other conventional clamping structures.

Considering that the structure in the side portion of the lower smoke collecting chamber 20 is complicated, it is inconvenient to provide screws or screw holes, and therefore, the inventor optimizes: the first connecting part 621 is connected with the lower smoke collecting cavity 20 in a clamping manner, and the second connecting part 622 is connected with the upper smoke collecting cavity 10 through a screw, so that the side part of the lower smoke collecting cavity 20 does not need to be provided with a screw or a screw, and the reliable positioning and firm connection between the connecting piece 62 and the smoke collecting cavity 1 are ensured.

Further, as shown in fig. 1-3, the front end 102 of the upper smoke collecting cavity is further provided with a smoke blocking member 80 for preventing the diffusion of the smoke, the lower end of the smoke blocking member 80 extends downwards to protrude at least 2CM beyond the front end 102 of the upper smoke collecting cavity, the smoke blocking member 80 is matched with the smoke blocking members 60 on two sides, the smoke collecting effect is achieved on the smoke, and the escape preventing effect of the range hood is enhanced.

In an embodiment, the vertical projection of the first air inlet 11 at least partially coincides with the oil smoke generating area below the range hood, and compared with a general range hood, the position of the first air inlet 11 in the embodiment is closer to the right side as shown in fig. 6, and a relatively large space is conveniently reserved for arranging the first air inlet 11, so that the first air inlet 11 can be arranged relatively large, and the oil smoke absorption is more facilitated; on the other hand, the negative pressure of the second air inlet 21 is increased, so that the oil smoke which is not sucked into the second air inlet 21 is closer to the right side as shown in fig. 6 during the upward movement, which is beneficial for the oil smoke to be sucked into the first air inlet 11. The oil smoke generating area may comprise a kitchen range or a cooker.

Considering that when the vertical projection of the first air inlet 11 and the oil smoke generation area below the range hood overlap, condensed oil drops may fall into the oil smoke generation area through the first air inlet 11, and cause bad experience for users, for this reason, as shown in fig. 3, an oil guide plate 12 is arranged in the upper smoke collecting cavity 10, the oil guide plate 12 is arranged above the first air inlet 11, and the oil guide plate 12 can prevent condensed oil from falling into the first air inlet 11.

Further, the oil guide plate 12 extends obliquely from top to bottom in the height direction towards the inside of the fume collecting cavity 1, the oil guide plate 12 plays a role in guiding oil, and the oil falls onto the oil guide plate 12, flows downwards along the oil guide plate 12 and flows downwards to the bottom of the fume collecting cavity 20 for collection.

As shown in fig. 1-4, the lower smoke collecting cavity 20 is provided with a second condensing plate 22, and the second air inlet 21 is arranged below the second condensing plate 22; the guide plate 30 is connected to the inner side of the second condensing plate 22. The part of the soot outside the soot collecting cavity 1 contacts the second condensation plate 22 to be condensed into droplets, and the droplets flow downward along the second condensation plate 22 and can continue to flow to the guide plate 30 to be guided by the guide plate 30 to fall to the bottom of the lower soot collecting cavity 20. Further, the guide plate 30 includes a connecting portion 31, and the connecting portion 31 is attached to the inner wall of the second condensation plate 22, so that the connection between the guide plate 30 and the second condensation plate 22 is tighter, and oil droplets can smoothly flow from the second condensation plate 22 to the guide plate 30. The connection portion 31 and the second condensation plate 22 may be connected by an adhesive.

The inventor has made further improvements to the mounting structure of the guide plate 30: as shown in fig. 4 and 5, a filter screen assembly 50 is arranged in the lower smoke collecting cavity 20, the filter screen assembly 50 comprises a filter screen frame 51 and a filter screen 52 connected with the filter screen frame 51, and the filter screen frame 51 is connected with the inside of the smoke collecting cavity 1; the connecting part 31 is clamped between the filter screen frame 51 and the inner wall of the second condensation plate 22, so that the connecting part 31 is pressed on the second condensation plate 22, the guide plate 30 is kept close to the second condensation plate 22, and oil drops can smoothly flow onto the guide plate 30 from the second condensation plate 22; the filter screen frame 51 can be connected with the smoke collecting cavity 1 by adopting the existing structure, and screws are not required to be arranged on the guide plate 30, so that the assembly is convenient. Preferably, after the connection portion 31 is adhered to the second condensation plate 22, the compression is performed by the filter mesh frame 51.

In this lampblack absorber, through setting up baffle 30, make the air inlet area of second air intake 21 reduce in order to increase the negative pressure of second air intake 21, preferably, the proportion scope of the air inlet area of second air intake 21 and the air inlet area of first air intake 11 is at 1:2 to 1:7, be favorable to balancing the negative pressure size of first air intake 11 and second air intake 21 better, ensure this lampblack absorber's anti-escape effect, reinforcing oil smoke absorbing capacity, for example, the ratio of the air inlet area of second air intake 21 and the air inlet area of first air intake 11 equals 1:2; or, the ratio of the air intake area of the second air intake 21 to the air intake area of the first air intake 11 is equal to 1:7, preparing a base material; or, the ratio of the air intake area of the second air intake 21 to the air intake area of the first air intake 11 is equal to 1:5. the range hood can reduce the oil smoke concentration from 50-60 mg/cubic meter to 20 mg/cubic meter.

The lower smoke collecting cavity 20 and the upper smoke collecting cavity 10 of the range hood are communicated, the top surface of the upper smoke collecting cavity 10 is connected with a smoke channel 2, and the smoke channel 2 is connected with a fan or is arranged in the smoke channel 2 so as to guide out smoke outwards through the smoke channel 2. As shown in fig. 1-3, the range hood is a top side double range hood, the upper smoke collecting cavity 10 comprises a top smoke collecting cavity 101, and the lower smoke collecting cavity 20 comprises a side smoke collecting cavity 201. However, the range hood is not limited to the top side double-suction range hood, and the range hood can be in other structural forms, and the shape and arrangement form of the upper smoke collecting cavity 10 and the lower smoke collecting cavity 20 are not limited.

Fig. 2-4 show schematic diagrams of the mounting state of the range hood, wherein the height direction is based on the mounting state of the range hood from top to bottom, and when the range hood is in a non-mounting state, for example, the state shown in fig. 1, the height direction is described in a related manner from top to bottom, so that the overall state of the range hood is adjusted.

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 (22)

1. A range hood is characterized in that,

comprises a smoke collecting cavity and a smoke collecting cavity,

the smoke collecting cavity comprises a lower smoke collecting cavity and an upper smoke collecting cavity positioned above the lower smoke collecting cavity,

the upper smoke collecting cavity is provided with a first air inlet, the lower smoke collecting cavity is provided with a second air inlet,

a guide plate is arranged at the upper part of the second air inlet,

the guide plate is at least partially positioned in the lower smoke collecting cavity and is used for at least increasing the negative pressure of the second air inlet.

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

the guide plate extends downwards from top to bottom in the height direction and is inclined towards the inside of the lower smoke collecting cavity.

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

the lower part of the second air inlet is also provided with a first condensing plate, and the first condensing plate extends upwards from bottom to top in the height direction and inclines towards the interior of the lower smoke collecting cavity.

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

the vertical projection of the lower part of the guide plate is at least partially overlapped with the first condensing plate;

alternatively, the vertical projection of the guide plate at least partially coincides with the first condensation plate.

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

the lower end of the lower smoke collecting cavity is provided with an oil cup, and the vertical projection of the lower part of the guide plate is at least partially overlapped with the oil cup;

or, the lower end of the lower smoke collecting cavity is provided with an oil cup, and the vertical projection of the guide plate is at least partially overlapped with the oil cup.

6. A range hood according to any one of claims 1 to 5, characterized in that,

and smoke blocking pieces for preventing the diffusion of the oil smoke are arranged on two sides of the smoke collecting cavity.

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

the cigarette blocking piece comprises a cigarette blocking plate and a connecting piece, wherein the cigarette blocking plate is connected to the connecting piece, and the connecting piece is installed on the side part of the cigarette collecting cavity.

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

the connecting piece is provided with first joint portion, collection cigarette chamber is provided with second joint portion, first joint portion with joint mode joint in second joint portion.

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

the opening of the second clamping part faces downwards, and the first clamping part can slide from bottom to top to enter the second clamping part.

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

the connecting piece is provided with a stop block, and the stop block is abutted with the smoke collecting cavity so as to prevent the connecting piece from transversely moving relative to the smoke collecting cavity;

and/or the second clamping part is provided with a stop block, and the stop block is abutted with the side part of the connecting piece so as to prevent the connecting piece from transversely moving relative to the smoke collecting cavity.

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

the connecting piece is also connected with the smoke collecting cavity through a screw.

12. The range hood of claim 11, wherein the range hood further comprises a hood body,

the connecting piece comprises a first connecting part connected with the side part of the lower smoke collecting cavity and a second connecting part connected with the side part of the upper smoke collecting cavity;

the first connecting part is connected with the lower smoke collecting cavity in the clamping mode and/or the screw, and/or the second connecting part is connected with the upper smoke collecting cavity in the clamping mode and/or the screw.

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

the front end of the upper smoke collecting cavity is further provided with a smoke blocking piece for preventing the diffusion of the oil smoke, and the lower end of the smoke blocking piece extends downwards to at least 2CM protruding from the front end.

14. A range hood according to any one of claims 1 to 5, characterized in that,

and the vertical projection of the first air inlet is at least partially overlapped with a lampblack generating area below the lampblack absorber.

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

the upper smoke collecting cavity is internally provided with an oil guide plate, and the oil guide plate is arranged above the first air inlet.

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

the oil guide plate extends obliquely from top to bottom in the height direction towards the inside of the smoke collecting cavity.

17. A range hood according to any one of claims 1 to 5, characterized in that,

the lower smoke collecting cavity is provided with a second condensing plate, and the second air inlet is arranged below the second condensing plate;

the guide plate is connected to the inner side of the second condensing plate.

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

the guide plate comprises a connecting part, and the connecting part is attached to the inner wall of the second condensing plate.

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

the lower smoke collecting cavity is internally provided with a filter screen assembly, the filter screen assembly comprises a filter screen frame and a filter screen connected with the filter screen frame, and the filter screen frame is connected to the inside of the smoke collecting cavity;

the connecting part is clamped between the filter screen frame and the inner wall of the second condensing plate.

20. A range hood according to any one of claims 1 to 5, characterized in that,

the tail end of the guide plate is provided with a bending part.

21. A range hood according to any one of claims 1 to 5, characterized in that,

the range hood comprises a top side double-suction range hood, the upper smoke collecting cavity comprises a top smoke collecting cavity, and the lower smoke collecting cavity comprises a side smoke collecting cavity.

22. A range hood according to any one of claims 1 to 5, characterized in that,

the ratio range of the air inlet area of the second air inlet to the air inlet area of the first air inlet is 1:2 to 1: 7.