CN217763575U - Smoke exhaust ventilator - Google Patents

Abstract

The application relates to a range hood, which comprises a casing, a fan unit arranged in the casing, an air inlet rectifying module and an air outlet rectifying module, wherein the air inlet rectifying module and the air outlet rectifying module are respectively arranged at an air inlet and an air outlet of the fan unit; the air inlet rectifying module and the air outlet rectifying module are provided with a plurality of rectifying holes; the axial length of the plurality of rectifying holes is not less than 2 mm; the axial extension direction of a plurality of rectifying holes of the air inlet rectifying module is consistent with the air suction direction of the fan unit; and the axial extension direction of the plurality of rectifying holes of the air outlet rectifying module is consistent with the air outlet direction of the fan unit. This application smoke ventilator's air inlet rectifier module, air-out rectifier module can rectify the air current of fan unit air intake and air outlet department, hinder turbulent formation to the production of noise abatement.

Description

Cooking fume exhauster

Technical Field

The application relates to a range hood.

Background

The range hood has become one of the kitchen appliances indispensable to modern family. As a range hood for purifying a kitchen environment, a fan is generally used to rapidly pump away wastes burned by a stove and oil smoke harmful to a human body generated in a cooking process, exhaust the wastes to the outside, reduce pollution, and purify indoor air.

When the oil smoke is great, will improve convulsions efficiency, the increase amount of wind of taking out, just must increase the power of fan and realize, will produce bigger vibrations like this to produced great noise, influenced the travelling comfort that smoke ventilator used, brought not good use for the consumer and experienced.

Therefore, a solution to the above problems of the existing range hood is urgently needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that smoke ventilator produced the noise, this application provides a smoke ventilator.

The range hood comprises a shell, a fan unit arranged in the shell, an air inlet rectification module and an air outlet rectification module, wherein the air inlet rectification module and the air outlet rectification module are respectively arranged at an air inlet and an air outlet of the fan unit; the air inlet rectifying module and the air outlet rectifying module are provided with a plurality of rectifying holes; the axial length of the plurality of rectifying holes is not less than 2 mm; the axial extension direction of a plurality of rectification holes of the air inlet rectification module is consistent with the air suction direction of the fan unit; the axial extending direction of a plurality of rectifying holes of the air outlet rectifying module is consistent with the air outlet direction of the fan unit.

Optionally, the air inlet rectification module with the air-out rectification module all sets up to the flat structure, and is a plurality of the rectifying hole is in the air inlet rectification module with equal array distribution on the air-out rectification module.

Optionally, the number of the fan units is at least two, the air inlet rectification module covers at least two air inlets of the fan units, and the air outlet rectification module covers at least two air outlets of the fan units.

Optionally, a plurality of the rectifying holes are arranged in a circle, an ellipse or a polygon; the aperture of the rectifying holes is set between 0.5 and 5.5 millimeters; the thickness of the side wall between two adjacent rectifying holes is not more than 1 mm.

Optionally, air inlet chamber and air outlet chamber have in the casing, have on the casing with the smoke inlet of air inlet chamber intercommunication, and with the outlet of air outlet chamber intercommunication, the smoke inlet advance with the outlet sets up on the equidirectional, the air outlet direction of fan unit is just right the outlet direction of casing.

Optionally, the air inlet of the fan unit is located in the air inlet cavity, the air outlet of the fan unit is located in the air outlet cavity of the housing, and the air inlet and the air outlet of the fan unit are arranged in different directions.

Optionally, the fan unit is disposed in the air outlet cavity, and the air inlet and the air outlet of the fan unit are in the same direction.

Optionally, the casing has a front plate, and a sound reflection module is disposed in the casing and at least disposed on the front plate of the casing; the sound reflection module is provided with a plurality of reflection parts protruding towards the inside of the shell.

Optionally, a sound insulation layer is arranged on the casing, and the sound insulation layer is at least arranged on the front plate of the casing; the soundproof layer is located between the front plate and the sound reflection module.

Optionally, the front plate of the casing includes a vertical plate portion, a horizontal plate portion and an inclined portion, which are sequentially connected from top to bottom, and the inclined portion is provided with a smoke inlet; the sound reflection module and the baffle are disposed on the vertical plate portion and the horizontal plate portion of the front plate.

In the smoke ventilator of this application, the rectification hole of air inlet rectifier module and air-out rectifier module can carry out the rectification to the air current before getting into the fan unit and the air current behind the fan unit, the length in a plurality of rectification holes is not less than 2 millimeters, thereby can carry out abundant guide to the air current direction through the rectification hole, play effectual rectification effect, make the air current direction unanimous with the length direction in rectification hole, hinder the air current and form turbulent flow state, thereby noise abatement's production.

Drawings

Fig. 1 is a schematic overall structure diagram of a range hood provided in the first embodiment of the present application;

fig. 2 is a sectional view of a range hood provided in the first embodiment of the present application;

fig. 3 is a sectional view of an air inlet rectification module or an air outlet rectification module of a range hood according to an embodiment of the present disclosure;

fig. 4 is a flow diagram of an air flow before being rectified by an air inlet rectification module and an air outlet rectification module of the range hood in the present application;

FIG. 5 is a flow diagram of the air flow after being rectified by the inlet air rectification module and the outlet air rectification module of the range hood in the present application;

fig. 6 is a schematic structural diagram of an air inlet rectification module or an air outlet rectification module of a range hood according to a first embodiment of the present application;

fig. 7 is a cross-sectional view of a fan unit of a range hood provided in an embodiment of the present application, the fan unit being an axial flow fan;

fig. 8 is a schematic structural diagram of a fan unit, an air rectification module and an air outlet rectification module of a range hood according to a first embodiment of the present application;

fig. 9 is a schematic structural view of a sound reflection module and a soundproof layer part of a range hood according to an embodiment of the present application;

fig. 10 is a cross-sectional view of a sound reflection module and a soundproof layer portion of a range hood according to an embodiment of the present application;

fig. 11 is a sectional view of a range hood according to a second embodiment of the present application.

The one-to-one correspondence between component names and reference numbers in fig. 1 to 11 is as follows: 100. a housing; 101. a smoke inlet; 102. a smoke outlet; 103. an air inlet cavity; 104. an air outlet cavity; 110. a front plate; 111. a vertical plate portion; 112. a lateral plate portion; 113. an inclined portion; 120. a back plate; 130. a side plate; 140. a smoke collecting hood; 150. a flue; 200. a fan unit; 201. an air inlet; 202. an air outlet; 310. an air inlet rectification module; 320. an air outlet rectification module; 301. a flow rectifying hole; 400. a sound reflection module; 410. a reflection section; 500. and a sound insulation layer.

Detailed Description

The following description of specific embodiments of the present application refers to the accompanying drawings.

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.

In this context, "equal," "same," and the like are not strictly mathematical and/or geometric limitations, but also encompass errors that may be understood by one skilled in the art and that may be allowed for manufacturing or use, etc.

Unless otherwise indicated, numerical ranges herein include not only the entire range within its two endpoints, but also several sub-ranges subsumed therein.

At present, the smoke ventilator is usually provided with sound absorbing materials, such as sound absorbing cotton, to reduce the noise of the smoke ventilator, but the noise reduction effect is not ideal. The noise of the range hood is mainly generated in the running process of the fan, and the blades of the fan rub or impact with air when rotating at a high speed to drive the air to flow in a turbulent flow state, so that the noise is generated.

The application provides a smoke ventilator can effectively reduce its noise by the fan production, provides better culinary art for the user and experiences. The following embodiments will explain the specific structure and operation principle of the range hood of the present application in detail with reference to fig. 1 to 11.

Example 1

As shown in fig. 1 and fig. 2, the range hood provided by the present application includes a casing 100 and a fan unit 200 installed inside the casing 100, the casing 100 has a smoke inlet 101 and a smoke outlet 102, and the fan unit 200 has an air suction inlet 201 and an air outlet 202; the range hood further comprises an air inlet rectification module 310 arranged at the air inlet 201 of the fan unit 200, and an air outlet rectification module 320 arranged at the air outlet 202 of the fan unit 200. As shown in fig. 3, each of the inlet fairing module 310 and the outlet fairing module 320 has a plurality of fairing holes 301, and each of the plurality of fairing holes 301 is a through hole. The axial extending direction of the plurality of rectifying holes 301 of the air inlet rectifying module 310 is consistent with the air suction direction of the fan unit 200, the axial extending direction of the plurality of rectifying holes 301 of the air outlet rectifying module 320 is consistent with the air outlet direction of the fan unit 200, and the air flow before entering the fan unit 200 and the air flow after passing through the fan unit 200 can be rectified, the air flow direction before rectification and after rectification is as shown in fig. 4 and 5, the air flow before rectification is in a turbulent flow state, the air flow direction after rectification is consistent, the turbulent flow state is changed, and therefore noise is reduced. Compare and fall the noise through the mode of noise absorption at present, rectifier module in this application directly starts from the source of noise, reduces the production of fan unit 200 department noise, and noise reduction effect is showing more.

The axial length of the plurality of rectifying holes 301 of the air inlet rectifying module 310 and the air outlet rectifying module 320 is not less than 2 mm, so that the airflow direction passing through the rectifying holes 301 can be sufficiently guided, an effective rectifying effect is achieved, and the airflow direction is consistent with the length direction of the rectifying holes 301. In a certain range, the longer the length of the rectifying hole 301 is, the better the rectifying effect on the air flow is, and in consideration of the noise reduction effect and the restriction of the internal space structure of the cabinet 100 on the length of the rectifying hole 301, it is preferable that the length of the rectifying hole 301 is set between 3-10 mm.

The air inlet rectification module 310 and the air outlet rectification module 320 can be both arranged to be of flat plate structures, are simple in structure, can facilitate processing and manufacturing, control cost and are simple and convenient to install. The lengths of the rectifying holes 301 are all the same as the thicknesses of the corresponding inlet rectifying module 310 or outlet rectifying module 320, the inlet rectifying module 310 covers the air inlet 201 of the fan unit 200, and the outlet rectifying module 320 covers the air outlet 202 of the fan unit 200. The shape of the plurality of rectifying holes 301 includes, but is not limited to, a circle, an ellipse, a polygon, etc., wherein the polygon may be a triangle, a quadrangle, a pentagon, a hexagon, or a polygon with more than one sides, it should be noted that the polygon may be a regular polygon, or a non-regular polygon, for example: equilateral triangle, square, rectangle, regular hexagon, etc. The plurality of rectifying holes 301 may be disposed in the same shape and distributed on the inlet air rectifying module 310 or the outlet air rectifying module 320 according to a certain rule. When the rectifying holes 301 are rectangular, they may be arranged in a grid pattern on the inlet air rectifying module 310 or the outlet air rectifying module 320, or may be arranged in a grid pattern in sequence. Preferably, as shown in fig. 6, the plurality of rectifying holes 301 in this embodiment are arranged in a regular hexagon structure, and the plurality of rectifying holes 301 are arranged in an array on the inlet air rectifying module 310 or the outlet air rectifying module 320, forming a grid structure. According to the principle that the turbulent flow of gas generates noise, the smaller the aperture of the rectifying hole 301 is, the better the rectifying effect on the gas flow is, so that the better the noise reduction effect is, but the smaller the aperture is, the lower the ventilation rate of the air inlet rectifying module 310 or the air outlet rectifying module 320 is, the larger the processing difficulty is, and the smoking efficiency and the processing cost of the range hood are affected. Therefore, the aperture of the rectifying hole 301 should be selected in consideration of noise reduction effect, actual ventilation rate, processing difficulty, and the length of the rectifying hole 301, and in this embodiment, the aperture of the rectifying hole 301 may be set to be between 0.5 mm and 5.5 mm. When the plurality of rectifying holes 301 are circular or regular polygon shaped, the diameter of the circular rectifying hole 301 or the diameter of the inscribed circle of the regular polygon may be set between 0.8 mm and 5.2 mm. Preferably, the diameter of the circular rectifying hole 301 or the diameter of the inscribed circle of the regular polygon may be further set between 2-3.5 mm.

The distance between the plurality of rectifying holes 301 also affects the ventilation amount of the inlet rectifying module 310 or the outlet rectifying module 320, and the thinner the thickness of the sidewall between the adjacent rectifying holes 301 is, the higher the ventilation amount is, and the thickness of the sidewall between the adjacent rectifying holes 301 should be reduced as much as possible under the condition of ensuring the structural strength of the finishing mold to be sufficient. Preferably, in this embodiment, the thickness of the adjacent sidewall of any two of the rectifying holes 301 is not greater than 1 mm. The material of the inlet rectification module 310 or the outlet rectification module 320 includes, but is not limited to, metal, plastic, etc., and preferably, the inlet rectification module 310 or the outlet rectification module 320 may be made of aluminum foil in this embodiment. The aluminum foil has good ductility, is favorable for reducing the thickness of the side wall of the rectifying hole 301, and ensures the ventilation rate of the air inlet rectifying module 310 or the air outlet rectifying module 320.

In this embodiment, as shown in fig. 1 and 2, the housing 100 of the range hood is configured to have a side-suction structure. The side-suction type range hood gives up a part of cooking space, so that people are not easy to be hit by the machine shell 100 during cooking, and the side-suction type range hood has less oil dripping problem. Specifically, an air inlet cavity 103 and an air outlet cavity 104 are arranged in the casing 100, a smoke inlet 101 of the casing 100 is communicated with the air inlet cavity 103, and a smoke outlet 102 of the casing 100 is communicated with the air outlet cavity 104. And, the smoke inlet 101 and the smoke outlet 102 are arranged in different directions, the smoke inlet 101 is arranged obliquely, and the smoke outlet 102 is arranged vertically upwards at the top of the air outlet cavity 103. In order to make the airflow smoothly exit the smoke outlet 102, the air outlet 202 of the blower unit 200 is arranged to face the smoke outlet 102 of the casing 100. Specifically, the cabinet 100 includes a front plate 110, a back plate 120, and two side plates 130, the back plate 120 is disposed vertically, and the front plate 110 includes a vertical plate portion 111, a horizontal plate portion 112, and an inclined portion 113 connected in this order from top to bottom. Wherein, the air inlet cavity 103 is enclosed by the transverse plate part 112, the inclined part 113, the lower part of the back plate 120 and the lower parts of the two side plates 130; the air outlet cavity 103 is formed by the upper parts of the vertical plate part 111, the back plate 120 and the two side plates 130; the smoke inlet 101 of the cabinet 100 is provided on the inclined portion 113 of the front plate 110.

In one embodiment, as shown in fig. 2, the air inlet 201 and the air outlet 202 of the blower unit 200 are disposed in different directions, the air inlet 201 of the blower unit 200 is located in the air inlet chamber 103, and the air outlet 202 is located in the air outlet chamber 104, and the blower unit 200 can change the direction of the air flow to adapt to the structure of the casing 100. In this embodiment, the fan unit 200 may be a centrifugal fan, which has a large air volume and a good smoking effect.

In another embodiment, as shown in fig. 7, the air inlet 201 and the air outlet 202 of the fan unit 200 are disposed in the same direction and directly face the smoke outlet 102 of the casing 100, the installation position of the fan unit 200 is more flexible, and more installation spaces can be provided for the inlet air rectifying module 310 and the outlet air rectifying module 320. In this embodiment, the fan unit 200 may be an axial fan, which has a small air volume but is easier to install.

The number of the fan units 200 may be one or at least two according to the requirement of the air suction volume. When at least two fan units 200 are installed in the casing 100, both the inlet rectification module 310 and the outlet rectification module 320 may be split structures, the inlet rectification module 310 covers the inlets 201 of the at least two fan units 200, and the outlet rectification module 320 covers the outlets 202 of the at least two fan units 200; the inlet rectification module 310 and the outlet rectification module 320 may also be of an integral structure, as shown in fig. 8, the inlet rectification module 310 covers the inlets 201 of the at least two fan units 200 at the same time, and the outlet rectification module 320 covers the outlets 202 of the at least two fan units 200 at the same time. The air inlet rectification module 310 and the air outlet rectification module 320 are both fixedly connected to the fan unit 200, and the specific connection manner includes, but is not limited to, welding, bonding, screwing, clamping, and the like. In order to facilitate the disassembly and cleaning, in a preferred embodiment, the inlet air rectification module 310 and the outlet air rectification module 320 are both fixedly connected to the housing of the fan unit 200 by screws.

The inlet rectification module 310 and the outlet rectification module 320 can reduce the noise generated at the fan unit 200, but cannot prevent the airflow from colliding with the fan unit 200, and the airflow may also rub and collide with the inner wall of the casing 100 and other components inside the casing 100, so that a part of the noise still exists. In order to reduce the noise from being transmitted to the outside of the casing 100, a sound reflection module 400 may be further provided inside the casing 100. As shown in fig. 9 and 10, the sound reflection module 400 is configured as a plate-shaped structure having a plurality of reflection parts 410 protruding toward the inside of the cabinet 100, and when noise is transmitted to the sound reflection module 400, the noise is reflected by the reflection parts 410 in different directions, so that the noise is blocked from being transmitted out of the cabinet 100, and sound waves are dispersed and propagated, thereby preventing echoes from being formed in the cabinet 100. The shape of the reflection part 410 includes, but is not limited to, a hemisphere, a cone, a pyramid, a wave, etc., and the plurality of reflection parts 410 may be distributed on the sound reflection module 400 in an orderly or unordered manner. In this embodiment, the reflective portions 410 are in a hemispherical structure and distributed in an array.

As shown in fig. 9 and 10, an acoustic insulation layer 500 may be further disposed on the casing 100, the acoustic insulation layer 500 includes, but is not limited to, a foam material, a polyester fiber acoustic wool, and the like, and the acoustic insulation layer 500 is disposed on the inner side of the casing 100. When the sound reflection module 400 is simultaneously provided on the cabinet 100, the soundproof layer 500 is provided between the cabinet 100 and the sound reflection module 400.

The sound reflecting module 400 and the soundproof layer 500 may entirely cover the cabinet 100 or may cover at least a portion of the cabinet 100. Noise emitted from the cabinet 100 due to the human hearing during cooking is mainly emitted from a portion of the cabinet 100 near the human, especially a portion of the cabinet 100 near the head height of the cook. For convenience of description herein, a side of the hood, which is close to a cooker in actual use, is defined as a front side, and the sound reflection module 400 and the soundproof layer 500 are disposed at least on the vertical plate portion 111 and the horizontal plate portion 112 of the front plate 110 and may be further disposed on the two side plates 130 on the left and right sides of the cabinet 100, considering the mounting process, the production cost, the height of a person, and the actual mounting height of the cabinet 100. The cross plate portion 112 is spaced apart from the bottom end of the back plate 120 by about 400-450 mm, and the sound reflection module 400 and the soundproof layer 500 are disposed between about 400-900 mm from the bottom end of the back plate 120, and when installed above the cooking bench, the distance between the sound reflection module 400 and the soundproof layer 500 and the ground is about 1.50-2.05 m, which can be extended according to the size of the cabinet 100 and the actual installation.

The implementation principle of the range hood of the application is as follows: an air inlet rectification module 310 is installed at an air inlet 201 of the fan unit 200, an air outlet rectification module 320 is installed at an air outlet 202 of the fan unit 200, a plurality of rectification holes 301 with certain length and aperture size are formed in the air inlet rectification module 310 and the air outlet rectification module 320, the rectification holes 301 can effectively guide and rectify passing air flow, and the air flow can be adjusted from a disordered state to an orderly state in the flow direction, so that the generation of noise is reduced, and better use experience is provided for cookers; the air inlet rectification module 310 and the air outlet rectification module 320 have simple integral structures, and also have the advantages of easy processing and manufacturing, low production cost and simple and convenient installation; in addition, the sound reflection module 400 and the soundproof layer 500, which block noise from being transmitted out of the cabinet 100, are further mounted on the cabinet 100, so that the noise reduction effect can be further improved.

Example 2

The difference of embodiment 2 compared with embodiment 1 is that the cabinet 100 is provided in a top-suction type structure. As shown in fig. 11, in the hood of the present embodiment, the cabinet 100 of the ceiling-suction type structure includes a hood 140 and a flue duct 150 connected above the hood 140. The smoke inlet 101 is arranged at the bottom of the smoke collecting cover 140, the smoke outlet 102 is arranged at the top of the smoke channel 150, and the smoke inlet 101 and the smoke outlet 102 are in the same direction. The fan unit 200 may be an axial fan, the installation position may be flexibly set, and the air inlet 201 and the air outlet 202 of the fan unit are opposite to the smoke outlet 102 at the top of the flue 150, so that the airflow is discharged through the smoke outlet 102 more smoothly. For the sake of brevity, the description of the same parts as those of embodiment 1 in embodiment 2 is omitted here.

Example 3

The difference of embodiment 3 compared to embodiment 1 is that the plurality of rectifying holes 301 are further restricted. Specifically, the inlet air rectifying module 310 and the outlet air rectifying module 320 are configured as a flat plate structure, and a plurality of rectifying holes 301 thereof are all configured as the same regular hexagonal hole and are distributed in an array on the inlet air rectifying module 310 and the outlet air rectifying module 320. The length of the rectifying holes 301 is set to 3-5 mm, the diameter of the inscribed circle of the rectifying holes 301 is set to 2-3 mm, and the thickness of the adjacent side wall between any adjacent rectifying holes 301 is set to 0.03-0.05 mm. For the sake of brevity, the description of the same parts as those of embodiment 1 in embodiment 3 is omitted here.

In this embodiment, the length of the rectifying hole 301 and the diameter of the inscribed circle can realize a large ventilation rate on the premise of ensuring a better rectifying and noise reducing effect, and the processing technology is relatively simple.

Example 4

The difference between embodiment 4 and embodiment 1 is that a plurality of rectifying holes 301 are further restricted. Specifically, the inlet air rectifying module 310 and the outlet air rectifying module 320 are configured as a flat plate structure, and a plurality of rectifying holes 301 thereof are all configured as the same regular hexagonal hole and are distributed in an array on the inlet air rectifying module 310 and the outlet air rectifying module 320. The length of the rectifying holes 301 is set to 5-7 mm, the diameter of the inscribed circle of the rectifying holes 301 is set to 3-4 mm, and the thickness of the adjacent side wall between any adjacent rectifying holes 301 is set to 0.05-0.1 mm. For the sake of brevity, the description of the same parts as those of embodiment 1 in embodiment 4 is omitted here.

In this embodiment, the length of the rectifying hole 301 and the diameter of the inscribed circle can realize a large ventilation rate on the premise of ensuring a better rectifying and noise reducing effect, and the processing technology is relatively simple.

The preferred embodiments and examples of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present application.

Claims (10)

1. A hood including a cabinet (100) and a fan unit (200) installed inside the cabinet (100), characterized in that: the air conditioner also comprises an air inlet rectification module (310) and an air outlet rectification module (320) which are respectively arranged at the air inlet (201) and the air outlet (202) of the fan unit (200); the air inlet rectifying module (310) and the air outlet rectifying module (320) are respectively provided with a plurality of rectifying holes (301); the axial length of the plurality of rectifying holes (301) is not less than 2 mm; the axial extension direction of a plurality of rectifying holes (301) of the air inlet rectifying module (310) is consistent with the air suction direction of the fan unit (200); the axial extending direction of the plurality of rectifying holes (301) of the air outlet rectifying module (320) is consistent with the air outlet direction of the fan unit (200).

2. The range hood of claim 1, wherein the inlet air rectifying module (310) and the outlet air rectifying module (320) are both configured as a flat plate structure, and the plurality of rectifying holes (301) are distributed on the inlet air rectifying module (310) and the outlet air rectifying module (320) in an array manner.

3. The range hood of claim 1, wherein the number of the fan units (200) is at least two, the inlet air rectification module (310) covers the inlets (201) of at least two of the fan units (200) simultaneously, and the outlet air rectification module (320) covers the outlets (202) of at least two of the fan units (200) simultaneously.

4. The range hood of claim 1, wherein the plurality of rectifying holes (301) are arranged in a circular, elliptical or polygonal shape; the aperture of the plurality of rectifying holes (301) is set to be between 0.5 and 5.5 millimeters; the thickness of the side wall between two adjacent rectifying holes (301) is not more than 1 mm.

5. The range hood of claim 1, wherein the housing (100) has an air inlet chamber (103) and an air outlet chamber (104), the housing (100) has a smoke inlet (101) communicated with the air inlet chamber (103) and a smoke outlet (102) communicated with the air outlet chamber (104), the smoke inlet (101) and the smoke outlet (102) are arranged in different directions, and the direction of the air outlet (202) of the fan unit (200) is opposite to the direction of the smoke outlet (102) of the housing (100).

6. The range hood of claim 5, wherein the air inlet (201) of the fan unit (200) is located in the air inlet chamber (103), the air outlet (202) of the fan unit (200) is located in the air outlet chamber (104) of the cabinet (100), and the air inlet (201) and the air outlet (202) of the fan unit (200) are arranged in different directions.

7. A range hood according to claim 5, characterized in that the fan unit (200) is arranged in the air outlet chamber (104) with the air inlet (201) and the air outlet (202) in the same direction.

8. The range hood according to any of claims 1-7, wherein the cabinet (100) has a front panel (110), a sound reflecting module (400) is provided in the cabinet (100), and the sound reflecting module (400) is provided at least on the front panel (110) of the cabinet (100); the sound reflection module (400) is provided with a plurality of reflection parts (410) protruding towards the inside of the machine shell (100).

9. The range hood of claim 8, wherein a sound insulation layer (500) is provided on the cabinet (100), the sound insulation layer (500) being provided at least on the front panel (110) of the cabinet (100); the acoustic insulation layer (500) is located between the front plate (110) and the sound reflection module (400).

10. The range hood of claim 9, wherein the front plate (110) of the cabinet (100) comprises a vertical plate part (111), a horizontal plate part (112) and an inclined part (113) which are connected in sequence from top to bottom, and the inclined part (113) is provided with a smoke inlet (101); the sound reflection module (400) and the sound insulation layer (500) are provided on the vertical plate portion (111) and the lateral plate portion (112) of the front panel (110).

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