An air duct system used on a range hood and a range hood

Abstract

The application provides a wind channel system used on an extractor hood and the extractor hood, the wind channel system comprising an upper wind channel plate and a lower wind channel plate, which are connected oppositely to form a wind channel; the wind channel is provided with a first air inlet at two ends, and an air outlet at a middle part; each of the two ends of the upper wind channel plate is provided with an upper fixing seat, and each of the upper fixing seats is provided with a lower fixing seat at a bottom, and the lower fixing seat is detachably connected with the upper fixing seat; a fan is arranged in a cavity of the lower fixing seat, and the lower fixing seat is provided with a second air inlet; and the lower fixing seat is provided with a second air outlet communicated with the first air inlet. The wind channel system used on the extractor hood has the fan function, can strengthen the air flow around the human body when the extractor hood is used, solves the problem that the human body feels hot when cooking in a closed kitchen, and is convenient for maintenance and replacement of the fan.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to an air duct system used on a range hood and the range hood. Background Art

[0002] With economic and technological advancements, the development of range hoods has accelerated, and their popularity has also increased. They have become an essential appliance in every home kitchen. Currently, to prevent the spread of fumes, doors and windows are often closed during cooking. This results in poor air circulation inside the kitchen, making people feel stuffy and hot. Especially in hot weather, people often end up drenched in sweat after cooking, creating a negative user experience.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide an air duct system for use on a range hood, which has a fan function and can enhance the air flow around the human body when using the range hood, thereby solving the problem of the human body feeling stuffy when cooking in a closed kitchen, and at the same time facilitating the maintenance and replacement of the fan.

[0005] Another object of the present invention is to provide a range hood comprising the above-mentioned air duct system.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides an air duct system for use on a range hood, comprising an upper air duct plate and a lower air duct plate, which are relatively connected to form an air duct; first air inlets are provided at both ends of the air duct, and an air outlet is provided in the middle of the air duct;

[0008] An upper fixing seat is provided at each end of the upper air duct plate, and a lower fixing seat is provided at the bottom of each upper fixing seat, and the lower fixing seat is detachably connected to the upper fixing seat; a fan is provided in the cavity of the lower fixing seat, and the lower fixing seat is provided with a second air inlet; the lower fixing seat is provided with a second air outlet connected to the first air inlet.

[0009] According to one embodiment of the present invention, a partition is provided in the middle of the air duct to divide the air duct into two independent sub-air ducts, and the first air inlet is provided at one end of the sub-air duct away from the partition, and the partition divides the air outlet into two first air outlets.

[0010] According to one embodiment of the present invention, a third air inlet communicating with the cavity of the lower fixing seat is provided at the bottom of the upper fixing seat;

[0011] And / or, the upper fixing base comprises a bottom plate and a side plate extending upward from the edge of the bottom plate, and an air inlet cavity is formed between the bottom plate and the side plate.

[0012] According to one embodiment of the present application, a plurality of guide plates are arranged in the sub-air duct, and the guide plates are located at the first air outlet.

[0013] According to one embodiment of the present application, the top of the guide plate and the partition plate is fixedly connected with the bottom surface of the upper air duct plate, and the bottom of the guide plate and the partition plate is fixedly connected with the top surface of the lower air duct plate.

[0014] According to one embodiment of the present application, the guide plate and the partition plate each have a partition gap, and the guide plate and the partition plate are divided into two parts.

[0015] According to one embodiment of the present application, the guide plate comprises a plurality of first guide plates and second guide plates; the length of the first guide plate is greater than the length of the second guide plate, and the first guide plate is located between two adjacent second guide plates.

[0016] And / or, the fan is a centrifugal fan, the fan outlet of the centrifugal fan has a distal end away from the center of the centrifugal fan and a proximal end close to the center of the centrifugal fan; the side wall of the sub-air duct corresponding to the distal end is a first wall, and the side wall of the sub-air duct corresponding to the proximal end is a second wall; an air outlet area is formed between adjacent guide plates, between the first wall and the corresponding guide plate, and between the second wall and the corresponding guide plate; along the direction from the first wall to the second wall, the width of each air outlet area gradually increases.

[0017] According to one embodiment of the present application, the sub-air duct comprises a first segment, a second segment and a third segment connected in sequence; a first included angle is formed between the center line of the first segment and the center line of the second segment, and a second included angle is formed between the center line of the second segment and the center line of the third segment, and the sum of the degrees of the first included angle and the second included angle is 270 degrees.

[0018] And / or, the upper air duct plate and the lower air duct plate are each provided with micropores, and the outer surface of the upper air duct plate and the lower air duct plate is provided with sound-absorbing cotton.

[0019] The present application also provides a range hood comprising the air duct system described above; the range hood is provided with an air duct fixing plate, and the upper fixing base and the upper air duct plate of the air duct system are fixedly connected with the bottom surface of the air duct fixing plate.

[0020] According to one embodiment of the present application, the air duct fixing plate is provided with an air inlet grille corresponding to the upper fixing base.

[0021] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0022] 1. The air duct system and range hood used in the range hood provided by the embodiment of the present invention can blow air to the user through the air outlet of the air duct, thereby enhancing the air flow around the human body and making the user feel cool. This can solve the problem of the human body feeling stuffy when cooking in a closed kitchen. In addition, since the fan is used in the kitchen, it is easily contaminated by condensed oil smoke, causing the fan to malfunction and requiring the fan to be disassembled for repair or replacement. The fan in the present invention is mounted on a lower fixing seat, which is detachably connected to the upper fixing seat of the upper air duct plate. When repairing the fan, there is no need to dismantle the entire air duct system. The corresponding lower fixing seat to be repaired can be directly removed, and the centrifugal fan can be quickly repaired and replaced.

[0023] 2. The air duct system and the range hood used on the range hood provided in the embodiment of the present invention adopt a dual-fan dual-duct system, with dual air ducts and dual centrifugal fans. The air duct adopts a double-turn design, which can change the wind direction in the air duct and reduce turbulence caused by sudden changes in wind direction, thereby reducing noise and vibration.

[0024] 3. The air duct system and range hood provided in the embodiments of the present invention include guide plates within the air duct, designed to vary in length, to evenly distribute the air volume across the various air outlet zones, achieving uniform air flow. The guide plates can be designed in a figure-7 shape, forming an angle with the first air outlet to expand the air flow range.

[0025] 4. The air duct system and range hood used on the range hood provided by the embodiment of the present invention have a dual-fan system using symmetrical centrifugal fans, a second air inlet is provided on the lower fixed seat, and a third air inlet is provided on the upper fixed seat, and can be used with single-sided air inlet or double-sided air inlet centrifugal fans.

[0026] 5. The air duct system and range hood used on the range hood provided by the embodiment of the present invention are designed with an air inlet cavity on the upper fixing seat, which can deepen the axial distance of the air inlet, improve the smoothness of the air inlet, reduce the speed of the fan, and thus reduce the fan noise.

[0027] 6. The air duct system and the range hood used on the range hood provided by the embodiment of the present invention adopt a micro-hole noise reduction design for the air duct. Micro-holes are designed in the upper and lower parts of the middle of the air duct (i.e., the upper air duct plate and the lower air duct plate), and sound-absorbing cotton is added on the surface to achieve the effect of reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them:

[0029] Figure 1 A schematic structural diagram of an air duct system used on a range hood provided by an embodiment of the present invention;

[0030] Figure 2 A schematic structural diagram of an upper air duct plate of an air duct system used on a range hood provided in an embodiment of the present invention;

[0031] Figure 3 A bottom view of an upper air duct plate of an air duct system used on a range hood provided by an embodiment of the present invention;

[0032] Figure 4 A schematic structural diagram of a downwind plate of an air duct system used on a range hood provided by an embodiment of the present invention;

[0033] Figure 5 A top view of a downwind plate of an air duct system used on a range hood provided by an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the installation positions of the micropores and silencer cotton of the air duct system used in the range hood provided by an embodiment of the present invention;

[0035] Figure 7 A three-dimensional diagram of the installation state of the air duct system used on the range hood provided by an embodiment of the present invention;

[0036] Figure 8 This is a front view of the installation status of the air duct system used on the range hood provided by an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Upper duct plate; 2. Lower duct plate; 3. Air duct; 30. Sub-duct; 301. First section; 302. Second section; 303. Third section; 304. First wall; 305. Second wall; 31. First air inlet; 32. First air outlet; 33. Micropores; 34. Silencing cotton; 4. Partition; 5. Upper fixing seat; 51. Third air inlet; 52. Bottom plate; 53. Side plate; 54. Air inlet cavity; 6. Lower fixing seat; 61. Second air inlet; 62. Second air outlet; 7. Fan; 8. Guide plate; 81. First guide plate; 82. Second guide plate; 9. Air duct fixing plate; 91. Air intake grille. DETAILED DESCRIPTION

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present invention and is not intended to limit the present invention. Indeed, it will be apparent to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompasses such modifications and variations as come within the scope of the appended claims and their equivalents.

[0040] In the description of the present invention, the words "first", "second" and similar terms do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprises" and similar terms mean that the element or object preceding the word includes the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects. The directions or positions indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention. The terms "connected", "connected" and "disposed" used in the present invention should be understood in a broad sense. For example, they can mean fixed connection or detachable connection; direct connection or indirect connection through an intermediate component; wired electrical connection, radio connection or wireless communication signal connection. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0041] like Figure 1 、 Figure 4 As shown, an embodiment of the present invention provides an air duct system for use in a range hood, comprising an upper air duct plate 1 and a lower air duct plate 2, which are connected relative to each other to form an air duct 3. The air duct 3 is provided with first air inlets 31 at both ends for admitting air into the air duct 3, and an air outlet is provided in the middle of the air duct 3 for blowing air toward the user.

[0042] In this embodiment, a partition plate 4 may be provided in the middle of the air duct 3 to divide the air duct into two independent sub-air ducts 30, which are symmetrically arranged. The first air inlet 31 is provided at one end of the sub-air duct 30 away from the partition plate 4, and the partition plate 4 divides the air outlet into two first air outlets 32, i.e., the air outlets of the sub-air duct 30.

[0043] like Figure 1As shown, the upper air duct plate 1 is provided with an upper fixing seat 5 at each end, and a lower fixing seat 6 is provided at the bottom of each upper fixing seat 5. The lower fixing seat 6 is detachably connected to the upper fixing seat 5. A fan 7, such as a centrifugal fan, is provided in the cavity of the lower fixing seat 6. The lower fixing seat 6 is provided with a second air inlet 61 for the fan 7 to enter. Preferably, as Figure 4 、 Figure 5 As shown, the second air inlet 61 corresponds to the inlet of the fan 7 to increase air volume. In this embodiment, the second air inlet 61 is provided on the bottom plate of the lower fixing base 6. The lower fixing base 6 is provided with a second air outlet 62 that communicates with the first air inlet 31. Preferably, the outlet of the fan 7 corresponds to the second air outlet 62, allowing the air blown by the fan 7 to directly enter the air duct 3 to reduce losses.

[0044] The air duct system for a range hood provided by an embodiment of the present invention can blow air toward the user through the air outlet of the air duct 3, enhancing air flow around the user and making the user feel cool, thereby resolving the problem of feeling stuffy when cooking in a closed kitchen. Furthermore, the system has symmetrical fans. Lower fixing bases 6 for mounting the left and right fans can be screwed to the bottom of the upper fixing bases 5 at both ends of the upper duct plate 1. The lower duct plate 2 is fixed to the bottom of the upper duct plate 1 via clips and screws. In the event of a centrifugal fan failure, the fan 7 can be removed along with the lower fixing base 6 by simply removing the screws connecting the lower fixing base 6 to the upper fixing base 5. This allows for quick replacement of the fan 7 without requiring the entire upper and lower duct 3 to be dismantled.

[0045] In one embodiment of the present invention, the upper duct plate 1 and the lower duct plate 2 are detachably connected by means of buckles, bolts, etc., so that the duct can be disassembled when the duct 3 needs to be repaired. In addition, the upper duct plate 1 and the lower duct plate 2 are made of nylon or other plastic materials.

[0046] In one embodiment of the present invention, Figure 2 、 Figure 3 As shown, the bottom of the upper fixing base 5 is provided with a third air inlet 51 that communicates with the cavity of the lower fixing base 6. In this embodiment, the fan 7 is designed with air inlets (the second air inlet 61 and the third air inlet 51) at the top and bottom. A single-inlet fan or a double-inlet fan can be used. If noise is a concern, a single-inlet fan can be used to achieve lower noise; if air volume is a concern, a double-inlet fan can be used to achieve a larger air volume.

[0047] In one embodiment of the present invention, Figure 1 As shown, the upper fixing seat 5 and the lower fixing seat 6 are shaped as a square shell with the opening facing upward. Figure 3 、 Figure 5 As shown, the second air inlet 61 and the third air inlet 51 are circular in shape, corresponding to the shape of a centrifugal fan.

[0048] In one embodiment of the present invention, Figure 2 As shown, the upper fixing base 5 includes a bottom plate 52 and side plates 53 extending upward from the edges of the bottom plate 52. An air inlet cavity 54 is formed between the bottom plate 52 and the side plates 53. The depth of the air inlet cavity 54 can be 19 mm. When the air duct system of the present invention is installed at the bottom of the air duct fixing plate of the range hood, the air inlet cavity is formed between the upper fixing base 5 and the air duct fixing plate, which increases the axial distance of the air inlet of the fan 7, making the air intake of the fan 7 smoother, thereby reducing noise and increasing air volume.

[0049] In one embodiment of the present invention, Figure 2-Figure 5 As shown, the sub-duct 30 is provided with several guide plates 8, the ends of which are located at the first air outlet 32. The guide plates 8 divide the interior of the sub-duct 30 into multiple sections, ensuring uniform airflow. Furthermore, the tops of the guide plates 8 and the partitions 4 are fixedly connected to the bottom surface of the upper duct plate 1, and the bottoms of the guide plates 8 and the partitions 4 are fixedly connected to the top surface of the lower duct plate 2.

[0050] In a preferred embodiment of the present invention, Figure 1 、 Figure 2 、 Figure 4 As shown, the partition plate 4 and the guide plate 8 each have a transverse separation gap in the middle, dividing the partition plate 4 and the guide plate 8 into upper and lower portions. In this embodiment, a portion of the partition plate 4 and the guide plate 8 are connected to the inner side surfaces of the upper duct plate 1 and the lower duct plate 2. This not only improves the structural strength of the upper duct plate 1 and the lower duct plate 2 (the partition plate 4 and the guide plate 8 act as reinforcement ribs), but also allows the partition plate 4 and the guide plate 8 to be combined to form a complete partition plate 4 and guide plate 8, which guides the air within the air duct 3. Furthermore, preferably, the separation gap is curved or stepped to facilitate positioning of the upper duct plate 1 and the lower duct plate 2 during installation.

[0051] In one embodiment of the present invention, Figure 2-Figure 5 As shown, the guide plate 8 includes a plurality of first guide plates 81 and second guide plates 82, that is, there are two types of guide plates, wherein the length of the first guide plate 81 is greater than the length of the second guide plate 82, and the first guide plate 81 is located between two adjacent second guide plates 82. In this embodiment, the number of first guide plates 81 is two, and the number of second guide plates 82 is three. Since the ends of the first guide plates 81 and the second guide plates 82 are both located at the first air outlet 32, the ends of the first guide plates 81 and the second guide plates 82 located in the air duct 3 divide the middle part of the sub-air duct 30 into three cavities and the ends into six cavities, gradually making each position of the first air outlet 32 ​​feel the wind.

[0052] like Figure 3 、 Figure 5As shown, in one embodiment of the present invention, the fan 7 is a centrifugal fan, and the fan outlet of the centrifugal fan has a distal end away from the center of the centrifugal fan and a proximal end close to the center of the centrifugal fan. The side wall corresponding to the distal end of the sub-air duct 30 is the first wall 304, and the side wall corresponding to the proximal end of the sub-air duct 30 is the second wall 305. An air outlet interval is formed between adjacent guide plates 8, between the first wall and the corresponding guide plate 8, and between the second wall and the corresponding guide plate 8. Due to the working principle of the centrifugal fan, the air volume at its distal end is greater than the air volume at the proximal end. Therefore, in this embodiment, the width of each air outlet interval gradually increases along the direction from the first wall 304 to the second wall 305, which can make the air outlet of each air outlet interval more uniform. In addition, the guide plate 8 is designed to be in the shape of 7, and an angle is formed between the end and the center line of the first air outlet 32, which can better guide the wind direction and expand the air outlet angle. The air outlet route is as follows. Figure 5 Indicated by the arrow direction.

[0053] In one embodiment of the present invention, Figure 5 As shown, the sub-duct 30 includes a first section 301, a second section 302, and a third section 303 connected in sequence. The side of the upper fixing base 5 is fixedly connected to the end of the first section 301. The second air outlet 62 of the lower fixing base 6 is connected to the first section 301, and the first air outlet 32 ​​is located at the end of the third section 303. A first angle is formed between the centerline of the first section 301 and the centerline of the second section 302, and a second angle is formed between the centerline of the second section 302 and the centerline of the third section 303. The sum of the first angle and the second angle is 270 degrees, which can achieve a 90-degree turn of the air discharged by the fan 7. For example, the first angle and the second angle are 166° and 104°, respectively. In this embodiment, the sub-air duct 30 adopts a double-turning design, and the air outlet of the fan 7 is guided through double angles. The wind comes out of the fan 7, and after turning at the first angle and the second angle, it completes a 90° turn to blow the air toward the user. This can change the wind direction in the sub-air duct 30 and reduce turbulence caused by sudden changes in wind direction, thereby reducing noise and vibration.

[0054] In one embodiment of the present invention, Figure 6 As shown, micropores 33 are provided in the middle of the upper duct plate 1 and the lower duct plate 2, for example, micropores with a diameter of 2 mm and a spacing of 6 mm. The outer surfaces of the upper duct plate 1 and the lower duct plate 2 are provided with silencer cotton 34. The noise of the air duct 3 is transmitted to the silencer cotton 34 through the micropores 33 and is adsorbed by the silencer cotton 34, thereby reducing the noise of the air duct 3.

[0055] In one embodiment of the present invention, corresponding bolt studs are provided between the upper fixing base 5, the lower fixing base 6, and the fan 7, facilitating simultaneous bolt connection of all three. Furthermore, bolt studs are also provided on the upper fixing base 5 and the top surface of the upper air duct plate 2 for bolt connection to the range hood's air duct fixing plate.

[0056] The present invention also provides a range hood comprising the above-mentioned air duct system. Figure 7 、 Figure 8 As shown, the range hood is provided with an air duct fixing plate 9 , and the upper fixing base 5 and the upper air duct plate 1 of the air duct system are fixedly connected to the bottom surface of the air duct fixing plate 9 .

[0057] In one embodiment of the present invention, when the upper fixing seat 5 includes a bottom plate 52 and a side plate 53 extending upward from the edge of the bottom plate 52, and the upper fixing seat 5 and the air duct fixing plate 9 form an air inlet cavity 54, the air duct fixing plate 9 is provided with an air inlet grille 91 corresponding to the upper fixing seat 5, which can deepen the axial distance of the fan air inlet, making the fan 7 smoother when taking in air, thereby reducing the fan noise and increasing the fan air volume.

[0058] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An air duct system used on a range hood, characterized in that: It comprises an upper air duct plate (1) and a lower air duct plate (2), which are relatively connected to form an air duct (3); a first air inlet (31) is provided at both ends of the air duct (3), and an air outlet is provided in the middle of the air duct (3); An upper fixing seat (5) is provided at each end of the upper air duct plate (1), and a lower fixing seat (6) is provided at the bottom of each upper fixing seat (5), and the lower fixing seat (6) and the upper fixing seat (5) are detachably connected; a fan (7) is provided in the cavity of the lower fixing seat (6), and the lower fixing seat (6) is provided with a second air inlet (61); the lower fixing seat (6) is provided with a second air outlet (62) connected to the first air inlet (31); a partition (4) is provided in the middle of the air duct (3) to separate the air duct (3) into two independent sub-air ducts (30) on the left and right; the first air inlet (31) is provided at one end of the sub-air duct (30) away from the partition (4), and the partition (4) separates the air outlet into two first air outlets (32); the direction of the first air inlet (31) is perpendicular to the direction of the first air outlet (32); A plurality of guide plates (8) are provided in the sub-air duct (30), the guide plates (8) are in a 7-shape, and the ends of the guide plates (8) are located at the first air outlet (32); The fan (7) is a centrifugal fan, and the fan outlet of the centrifugal fan has a distal end away from the center of the centrifugal fan and a proximal end close to the center of the centrifugal fan; the side wall of the sub-air duct (30) corresponding to the distal end is a first wall (304), and the side wall of the sub-air duct (30) corresponding to the proximal end is a second wall (305); air outlet intervals are formed between adjacent guide plates (8), between the first wall (304) and the corresponding guide plate (8), and between the second wall (305) and the corresponding guide plate (8); and the width of each air outlet interval gradually increases along the direction from the first wall (304) to the second wall (305).

2. The air duct system used on a range hood according to claim 1, characterized in that: A third air inlet (51) communicating with the cavity of the lower fixing seat (6) is provided at the bottom of the upper fixing seat (5); And / or, the upper fixing seat (5) comprises a bottom plate (52) and a side plate (53) extending upward from an edge of the bottom plate (52), and an air inlet cavity (54) is formed between the bottom plate (52) and the side plate (53).

3. The air duct system used on a range hood according to claim 1, characterized in that: The top of the guide plate (8) and the partition (4) are fixedly connected to the bottom surface of the upper air duct plate (1), and the bottom of the guide plate (8) and the partition (4) are fixedly connected to the top surface of the lower air duct plate (2).

4. The air duct system used on a range hood according to claim 3, characterized in that: The partition plate (4) and the guide plate (8) both have a separation gap, which separates the partition plate (4) and the guide plate (8) into two upper and lower parts.

5. The air duct system used on a range hood according to claim 1, 3 or 4, characterized in that: The guide plate (8) includes a plurality of first guide plates (81) and second guide plates (82); the length of the first guide plate (81) is greater than the length of the second guide plate (82), and the first guide plate (81) is located between two adjacent second guide plates (82).

6. The air duct system used on a range hood according to claim 1, characterized in that: The sub-air duct (30) comprises a first section (301), a second section (302) and a third section (303) connected in sequence; a first angle is formed between the center line of the first section (301) and the center line of the second section (302), a second angle is formed between the center line of the second section (302) and the center line of the third section (303), and the sum of the first angle and the second angle is 270 degrees; And / or, the upper air duct plate (1) and the lower air duct plate (2) are both provided with micropores (33), and the outer surfaces of the upper air duct plate (1) and the lower air duct plate (2) are provided with sound-absorbing cotton (34).

7. A range hood, characterized in that: Comprising an air duct system according to any one of claims 1 to 6; the range hood is provided with an air duct fixing plate (9); the upper fixing seat (5) and the upper air duct plate (1) of the air duct system are fixedly connected to the bottom surface of the air duct fixing plate (9).

8. The range hood according to claim 7, characterized in that: The air duct fixing plate (9) is provided with an air intake grille (91) corresponding to the upper fixing seat (5).

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