A range hood

Abstract

The utility model relates to a kind of range hood, including: smoke collecting hood, inside hollow formation bottom with the space of open mouth;Main deflector, is located at the open mouth of the space, main deflector is inclined downward from front to back;Rear deflector is arranged in the rear side of the main deflector, with the first deflector face that is inclined upward from front to back, the first deflector face and the rear side of the main deflector side interval is opposite and forms rear side air inlet gap, to make oil fume flow can enter smoke collecting hood along second deflector face;Front deflector is arranged in the front side of the main deflector, with the second deflector face that is inclined upward and extends from front to back, the second deflector face and the front side of the main deflector side interval is opposite and forms front side air inlet gap, to make oil fume flow can enter smoke collecting hood along second defector face.The utility model can reduce the risk of running smoke.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a range hood. Background Technology

[0002] Kitchen range hoods typically come in two types: top-mounted and side-mounted. Top-mounted range hoods utilize the upward movement of cooking fumes to create a negative pressure zone above the stove, effectively drawing in and removing the fumes. However, because top-mounted range hoods are installed a considerable distance from the stove, the fumes are easily affected by external environmental factors as they rise, causing them to escape and impacting the extraction efficiency. To address this, baffles or other deflectors are usually installed at the air inlet of the top-mounted range hood's fume collection hood, utilizing the wall adhesion effect to improve fume extraction. Specific examples include the structures disclosed in Chinese utility model patents CN202121316860.8 (application number CN216079941U, authorization announcement number) and CN202322337014.X (application number CN220541188U, authorization announcement number), both titled "A Range Hood."

[0003] The existing fume hood has a small air inlet in the center of the fume collection chamber at the bottom. The negative pressure chamber formed by the fume collection chamber and the baffle is narrow. When the range hood is in use, the fumes must bend 180° through the baffle before entering the fume collection chamber. When the amount of fumes is too large, they cannot be drawn into the fume collection chamber in time, resulting in fumes escaping. At the same time, after the fumes rise, they spread outwards along the outer surface of the baffle, causing grease to adhere to the outer surface of the range hood and the baffle, making them difficult to clean. Furthermore, the oil cup can only catch oil droplets from the baffle, not from the outer surface of the range hood, thus contaminating the countertop and the food in the pot. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a range hood that reduces the risk of smoke leakage, in light of the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0006] The smoke hood has a hollow interior, creating a space with an open bottom.

[0007] The main flow plate is located at the opening of the space;

[0008] Its features are:

[0009] The main flow plate is inclined downwards from front to back;

[0010] The range hood also includes:

[0011] The rear guide member located behind the main flow plate has a first guide surface that slopes upward from front to back. The first guide surface is spaced apart from the rear side of the main flow plate to form a rear air inlet gap, so that the oil fume airflow can enter the fume hood along the second guide surface.

[0012] The front guide member located in front of the main flow plate has a second guide surface that extends upward from front to back. The second guide surface is spaced apart from the front side of the main flow plate to form a front air inlet gap, so that the oil fume airflow can enter the fume hood along the second guide surface.

[0013] In use, some of the rising oil fumes can enter the fume hood along the first guide surface of the rear guide component, and some of the rising oil fumes, after encountering the main flow plate, can flow upward along the lower plate surface of the main flow plate and enter the fume hood along the second guide surface of the front guide component on the front side of the main flow plate. Therefore, the design of the front and rear guide components of this utility model can guide the oil fumes to be quickly drawn into the fume hood, reducing the risk of smoke escape.

[0014] To better guide the flow of oil fumes, preferably, the tilt angle of the main flow guide plate relative to the horizontal plane is smaller than the tilt angle of the first flow guide surface of the rear flow guide relative to the horizontal plane; and the tilt angle of the main flow guide plate relative to the horizontal plane is smaller than the tilt angle of the second flow guide surface relative to the horizontal plane.

[0015] Furthermore, let b be the tilt angle of the main flow guide plate relative to the horizontal plane, d be the tilt angle of the second flow guide surface relative to the horizontal plane, and a be the tilt angle of the first flow guide surface relative to the horizontal plane. The three satisfy: b < a = d < (90-b) / 2.

[0016] In the above scheme, preferably, the front guide member also has a third guide surface that extends backward and downward from the rear side of the second guide surface, and the junction of the second guide surface and the third guide surface is located on the upper side of the front side of the main guide plate, so that the oil fume airflow can enter the fume hood along the second and third guide surfaces.

[0017] Preferably, it also includes an oil cup located below the rear guide member, for receiving oil flowing down from the rear side of the main guide plate and the front side of the first guide surface.

[0018] In the above embodiments, preferably, the left and right sides of the main flow plate form a left air inlet gap and a right air inlet gap with the edges of the corresponding open sides, respectively. This allows the oil fume airflow to enter the fume hood through the perimeter of the main flow plate.

[0019] Preferably, the flow area of ​​the left and right air inlet gaps is smaller than the flow area of ​​the front and rear air inlet gaps. The oil fume flow rate on the front and rear sides of the main flow deflector is greater than the oil fume flow rate on the left and right sides.

[0020] Furthermore, the smoke collection hood has the following features:

[0021] The vertically extending left and right flanges, as well as the front and rear flanges connecting the left and right flanges, together form the opening.

[0022] The cover is installed around the front, back, left and right flanges, and the lower edge of the cover is joined with the lower edge of the corresponding flange so that the cover and each flange form the space inside the smoke collection hood.

[0023] The main flow plate is located above the opening, and its left and right sides are located outside the corresponding opening edges, forming the aforementioned left and right air inlet gaps. The left and right flanges of the fume hood 1 act as guides, allowing the rising fumes to enter the fume hood through the left and right air inlet gaps. Furthermore, oil dripping from the left and right sides of the main flow plate can be collected inside the fume hood.

[0024] This invention increases the negative pressure area at the bottom of the smoke hood, enabling full-area air intake and forming an inverted concave-shaped front and rear accelerated flow field under negative pressure, preventing the oil fumes from escaping after they rise.

[0025] Preferably, the distance between the rear side of the second guide surface and the front side of the main flow plate is greater than the vertical distance between the upper edge of the left and right flanges and the front side of the main flow plate;

[0026] The vertical distance between the first guide surface of the rear guide member and the rear side of the main guide plate is greater than the vertical distance between the upper edge of the left and right flanges and the rear side of the main guide plate.

[0027] Preferably, the front side of the first guide surface is located below the rear side of the main guide plate and is directly or indirectly connected to the rear flange of the smoke hood. The portion of the rear side of the first guide surface is directly or indirectly connected to the rear sidewall of the hood. Thus, the first guide surface, the hood, and the rear flange form a triangular reinforcing structure.

[0028] Compared with the prior art, the advantages of this utility model are as follows: through the design of the inclined main flow plate and the front and rear guide components, during use, some of the rising oil fume airflow can enter the fume collection hood along the first guide surface of the rear guide component, and some of the rising oil fume, after encountering the main flow plate, can flow upward along the lower plate surface of the main flow plate and enter the fume collection hood along the second guide surface of the front guide component on the front side of the main flow plate. Therefore, the design of the front and rear guide components of this utility model can guide the oil fume to be quickly drawn into the fume collection hood, reducing the risk of smoke escape. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the structure of an embodiment of the present utility model;

[0030] Figure 2 This is a cross-sectional view of an embodiment of the present utility model (the cross-section is a vertical plane extending from front to back);

[0031] Figure 3 for Figure 2 Enlarged view of section A in the middle;

[0032] Figure 4 for Figure 2 Enlarged view of section B;

[0033] Figure 5 This is a sectional view of a partial structure of an embodiment of the present utility model (the sectional view is a vertical plane extending from front to back);

[0034] Figure 6 This is another sectional view of a partial structure of an embodiment of the present utility model (the sectional view is a vertical plane extending from front to back);

[0035] Figure 7 This is a cross-sectional view of an embodiment of the present utility model (the cross-section is a vertical plane extending left and right);

[0036] Figure 8 for Figure 7 Enlarged view of section C. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] like Figures 1-8 As shown, this is a preferred embodiment of a range hood according to the present invention. The range hood includes a smoke collection hood 1, a main flow plate 2, a rear flow guide 3, a front flow guide 4, a fan frame 6, a fan system, and an oil cup 5.

[0039] The smoke hood 1 is hollow inside, forming a space with an opening 10 at the bottom. Specifically, the smoke hood 1 has a vertically extending left flange 11, a right flange 12, and a front flange 13 and a rear flange 14 connecting the left and right flanges, which together form the opening 10. The front flange 13 slopes backward from bottom to top, and the rear flange 14 slopes backward from bottom to top. The smoke hood 1 also has a cover body 15 covering the periphery of the front, rear, left, and right flanges. The lower edge of the cover body 15 joins with the lower edge of the corresponding flange, so that the cover body 15 and each flange enclose the space inside the smoke hood 1. In this embodiment, the lower edge of the left flange 11 is joined to the lower edge of the corresponding left side wall of the cover body 15 by a first wall 16 that slopes downward from front to back. The lower edge of the right flange 12 is joined to the lower edge of the corresponding right side wall of the cover body 15 by a second wall 17 that slopes downward from front to back.

[0040] The main flow vane 2 is located at the opening 10 of the space and slopes downwards from front to back. The edge of the main flow vane 2 extends backwards and upwards to form a folded edge, and at least two oil leakage holes 20 are provided on the main flow vane 2 near its rear side. Figure 4 As shown, the oil leakage holes 20 are spaced apart along the left and right direction. In this embodiment, the main flow plate 2 is supported above the opening 10 by the bracket 7 on its upper side, and the left and right sides of the main flow plate 2 are located outside the corresponding edge of the opening 10 to form a left air inlet gap 23 and a right air inlet gap 24. When the rising oil fumes pass through the left air inlet gap 23 and the right air inlet gap 24, the left flange 11 and the right flange 12 can play the role of guiding the oil fumes, assisting the oil fumes to flow upward into the fume collection hood. Moreover, the oil dripping from the left and right sides of the main flow plate 2 can be received by the first wall 16 and the second wall 17 of the fume collection hood 1, and the oil on the first and second walls flows downward and backward under its own gravity.

[0041] The rear guide member 3 is located behind the main flow plate 2 and has a first guide surface 31 that slopes upward from front to back. The first guide surface 31 and the rear side of the main flow plate 2 are spaced apart to form a rear air inlet gap 21, so that the oil fume airflow can enter the fume hood 1 along the second guide surface 41. In this embodiment, the front side of the first guide surface 31 is located below the rear side of the main flow plate 2 and is directly or indirectly connected to the rear flange 14 of the fume hood 1. The part where the rear side of the first guide surface 31 is located is directly or indirectly connected to the rear side wall of the hood 15, so that the first guide surface 31, the rear flange 14 and the rear side wall of the hood 15 are arranged in a triangle. The left and right ends of the first guide surface 31 are respectively engaged with the left and right side walls of the corresponding hood, so that the oil flowing down from the first and second walls of the fume hood can flow onto the first guide surface 31.

[0042] The front guide member 4 is located on the front side of the main flow plate 2, and has a second guide surface 41 extending upward from front to back at an angle, a third guide surface 42 extending backward and downward from the rear side of the second guide surface 41 at an angle, and a fourth guide surface 44 extending downward from the front side of the second guide surface 41. The second guide surface 41 and the front side of the main flow plate 2 are spaced apart to form a front air inlet gap 22. The junction 43 of the second guide surface 41 and the third guide surface 42 is located above and in front of the front side of the main flow plate 2, so that the oil fume airflow can enter the fume hood 1 along the second and third guide surfaces. The fourth guide surface 44 is located on the front side of the front flange 13, and the left end of the fourth guide surface 44 is located on the left side of the left flange 11, and the right end of the fourth guide surface 44 is located on the right side of the right flange 12.

[0043] In this embodiment, the flow area of ​​the front air inlet gap 22 and the rear air inlet gap 21 is greater than the flow area of ​​the left air inlet gap 23 and the right air inlet gap 24. Specifically, the shortest distance L4 between the rear side of the second guide surface 41 and the front side of the main flow plate 2 is greater than the shortest vertical distance L3 between the upper edge of the left and right flanges and the front side of the main flow plate 2 (that is, the area where L3 is located is the minimum air inlet area at the front end of the left and right sides of the smoke hood, that is, the area where L4 is located is the minimum air inlet area of ​​the front air inlet gap), and satisfies: 1.2L3>L4>L3, which ensures that the negative pressure area at the front is greater than the negative pressure areas on the left and right sides, and the oil fumes are accelerated to flow towards the forward guide component. The vertical distance L1 between the first guide surface 31 of the rear guide component 3 and the rear side of the main guide plate 2 is greater than the vertical distance L2 between the upper edge of the left and right flanges 12 and the rear side of the main guide plate 2 (i.e., the area where L2 is located is the maximum air intake area at the rear ends of the left and right sides of the smoke hood, and the area where L1 is located is the minimum air intake area at the rear side air intake gap), and satisfies: 1.2L2>L1>L2, ensuring that the negative pressure area at the rear side is greater than the negative pressure areas on the left and right sides, and the oil fumes are accelerated and guided towards the rear guide component, forming an "inverted concave" shaped internal accelerated flow field. Please refer to [link / reference] for details. Figure 5 .

[0044] And as Figure 5 As shown, let b be the tilt angle of the main guide plate 2 relative to the horizontal plane, d be the tilt angle of the second guide surface 41 relative to the horizontal plane, and a be the tilt angle of the first guide surface 31 relative to the horizontal plane. The three satisfy: b < a = d < 90 - b / 2.

[0045] The oil cup 5 is located below the rear guide member 3 and is used to receive the oil flowing down from the oil leakage hole 20 of the main guide plate 2 and the front side of the first guide surface 31.

[0046] The aforementioned fan frame 6 is located on the upper side of the fume hood 1, and the two are connected. The fan frame 6 houses a fan system (a conventional centrifugal fan) used to drive the oil fume airflow into the fume hood 1 and the fan frame 6 through the front, rear, left, and right air inlet gaps. Compared to traditional butterfly-blade European-style range hoods, this embodiment significantly increases the negative pressure area and forms an inverted concave-shaped front-to-back accelerating flow field surrounding the negative pressure, preventing the oil fumes from escaping after rising.

[0047] The range hood of this invention can be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the fan system and other components to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

[0048] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0049] The term "vertical" is also used in the specification and claims of this utility model, meaning basically along the up and down direction, and is not limited to just the vertical direction, but can also be slightly deviated from the vertical direction.

Claims

1. A range hood, comprising: The smoke hood (1) has a hollow interior forming a space with an opening (10) at the bottom; The main flow plate (2) is located at the opening (10) of the space; Its features are: The main flow plate (2) is inclined downward from front to back; The range hood also includes: The rear guide member (3) located behind the main flow plate (2) has a first guide surface (31) that is inclined upward from front to back. The first guide surface (31) and the rear side of the main flow plate (2) are spaced apart to form a rear air inlet gap (21) so that the oil fume airflow can enter the smoke hood (1) along the second guide surface (41). The front guide member (4) located on the front side of the main flow plate (2) has a second guide surface (41) that extends upward from front to back. The second guide surface (41) is spaced apart from the front side of the main flow plate (2) to form a front air inlet gap (22) so that the oil fume airflow can enter the smoke hood (1) along the second guide surface (41).

2. The range hood according to claim 1, characterized in that: The tilt angle of the main flow plate (2) relative to the horizontal plane is smaller than the tilt angle of the first flow guide surface (31) of the rear flow guide (3) relative to the horizontal plane; the tilt angle of the main flow plate (2) relative to the horizontal plane is smaller than the tilt angle of the second flow guide surface (41) relative to the horizontal plane.

3. The range hood according to claim 2, characterized in that: Let b be the angle of inclination of the main flow plate (2) relative to the horizontal plane, d be the angle of inclination of the second flow guide surface (41) relative to the horizontal plane, and a be the angle of inclination of the first flow guide surface (31) relative to the horizontal plane. The three satisfy: b < a = d < (90-b) / 2.

4. The range hood according to claim 1, characterized in that: The front guide (4) also has a third guide surface (42) that extends backward and downward from the rear side of the second guide surface (41). The junction (43) of the second guide surface (41) and the third guide surface (42) is located on the upper side of the front side of the main guide plate (2) so that the oil fume airflow can enter the smoke hood (1) along the second and third guide surfaces.

5. The range hood according to claim 1, characterized in that: It also includes an oil cup (5) located below the rear guide (3) for receiving oil flowing down from the rear side of the main guide plate (2) and the front side of the first guide surface (31).

6. The range hood according to any one of claims 1 to 5, characterized in that: The left and right sides of the main flow plate (2) form a left air intake gap (23) and a right air intake gap (24) with the left and right sides of the corresponding opening (10), respectively.

7. The range hood according to claim 6, characterized in that: The flow area of ​​the left air inlet gap (23) and the right air inlet gap (24) is smaller than the flow area of ​​the front air inlet gap (22) and the rear air inlet gap (21).

8. The range hood according to claim 6, characterized in that: The smoke collection hood (1) has the following features: The vertically extending left flange (11), right flange (12), and front flange (13) and rear flange (14) connecting the left and right flanges form the opening (10); A cover (15) is placed around the front, back, left and right flanges. The lower edge of the cover (15) is joined with the lower edge of the corresponding flange so that the cover (15) and each flange form the space inside the smoke collection hood (1). The main flow plate (2) is located above the opening (10), and the left and right sides of the main flow plate (2) are located outside the edge of the corresponding side opening (10) to form the left side air inlet gap (23) and the right side air inlet gap (24).

9. The range hood according to claim 8, characterized in that: The distance between the rear side of the second guide surface (41) and the front side of the main flow plate (2) is greater than the vertical distance between the upper edge of the left and right flanges (12) and the front side of the main flow plate (2); The vertical distance between the first guide surface (31) of the rear guide member (3) and the rear side of the main guide plate (2) is greater than the vertical distance between the upper edge of the left and right flanges (12) and the rear side of the main guide plate (2).

10. The range hood according to claim 8, characterized in that: The front side of the first guide surface (31) is located below the rear side of the main guide plate (2) and is directly or indirectly connected to the rear flange (14) of the smoke hood (1). The part of the rear side of the first guide surface (31) is directly or indirectly connected to the rear side wall of the hood (15).

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