Range hood

Abstract

The utility model relates to a range hood, which comprises a fan frame, a fan system and a fan cover, the exhaust fume collecting hood is connected to the bottom of the fan frame and communicated with the fan frame, and an air inlet is formed in the front side of the exhaust fume collecting hood; a first oil screen which is integrally inclined downwards from front to back is also arranged in the fan frame and / or the exhaust fume collecting hood and positioned below the fan system, and comprises an oil guide plate which extends longitudinally and ventilation areas which are positioned on the left side and the right side of the oil guide plate and are provided with air inlet holes; the two ventilation areas incline towards the left side and the right side from the position where the oil guide plate is located and towards the side where the fan system is located, and therefore the first oil screen is integrally in a V shape. The air inlet structure has the advantages that oil dripping from a fan system can be guided, air inlet resistance can be reduced, and adverse effects on the air inlet volume can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate based on the principles of fluid dynamics, using a centrifugal fan installed inside the hood to draw in and exhaust cooking fumes, while a filter removes some grease particles. A centrifugal fan consists of a volute, an impeller mounted within the volute, and a motor that drives the impeller. As the impeller rotates, negative pressure is generated at the fan's center, drawing cooking fumes from beneath the hood into the fan. After being accelerated by the fan, the volute collects them and guides them out of the room.

[0003] Common range hoods on the market include top-suction and side-suction types. Side-suction range hoods have a power source located closer to the stovetop, drawing most of the fumes closer to the stovetop away in an arc-shaped pattern. Their advantages include a thin body and a less bumpy head when operating. When cooking with low fumes, their low installation height allows the negative pressure zone to be closer to the fumes source, resulting in effective fume extraction. Existing side-suction range hoods typically feature an air inlet on the panel. To prevent the inlet from being exposed and unsightly when the hood is not in use, as well as fumes from backflowing, a smoke baffle is installed at the inlet, which also serves to trap fumes when the hood is in operation. For example, Chinese patent application number 201910426080.X discloses a side-suction range hood. Chinese cooking generates a large amount of fumes. Prolonged use of a range hood can cause condensation and accumulation of oil stains inside the hood where the fumes pass. Improper design can cause these accumulated oil stains to overflow the hood's surface and not flow into the oil cup, severely impacting the user experience. The oil smoke that enters the range hood condenses into oil droplets. Since the bottom of the close-suction range hood is designed with a slope, the oil smoke enters through the grille holes, and the oil droplets condensed on the top will drip onto the stove surface through this grille.

[0004] In order to solve the above technical problems, the Chinese utility model patent application with application number CN202010611515.0 (application publication number: CN112539433A) discloses a range hood, comprising a shell, a fan frame arranged above the shell, and a fan system arranged in the fan frame, the front side of the shell is provided with an air inlet, the shell is provided with an oil guide plate assembly for oil smoke to pass through, the oil guide plate assembly includes a first oil guide plate extending from the front side of the shell, located above the air inlet, and gradually tilted downward to the rear. By providing the first oil guide plate from front to rear, the oil droplets dripping from the fan frame after the fan is placed can be guided to the rear side of the shell, avoiding dripping from the air inlet onto the stove below the range hood.

[0005] However, the range hood in the above patent application still has certain shortcomings. Due to the setting of the first oil guide plate, it will inevitably produce a large air intake resistance, seriously affecting the air intake volume of the range hood. In severe cases, it may also cause eddy current phenomenon due to being close to the fan system, generating large noise and affecting the user experience.

[0006] Therefore, existing range hoods also need further improvement. Utility Model Content

[0007] The technical problem to be solved by the present invention is to provide a range hood which can guide the oil dripping from the fan system and reduce the air intake resistance to avoid adverse effects on the air intake volume in response to the current status of the existing technology.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: a range hood comprising:

[0009] A fan rack having a fan system therein;

[0010] The smoke collecting hood is connected to the bottom of the fan frame and is in communication with the fan frame. The front side of the smoke collecting hood is provided with an air inlet;

[0011] A first oil net that is tilted downward from front to back as a whole is also provided at a position below the fan system in the fan frame and / or smoke hood. The first oil net includes a longitudinally extending oil guide plate and ventilation areas with air inlet holes distributed on the left and right sides of the oil guide plate. The two ventilation areas are tilted from the position of the oil guide plate to the left and right sides respectively toward the side where the fan system is located, so that the first oil net is V-shaped as a whole.

[0012] The “longitudinal” in the aforementioned “longitudinally extending oil guide plate” can be understood as a direction substantially perpendicular to the left-right direction. Thus, the inclination direction of the oil guide plate is also downwardly inclined from front to back.

[0013] In order to further reduce the air inlet resistance of the airflow passing through the oil guide plate, the cross section of the oil guide plate is an arc-shaped structure that bulges toward the side away from the fan system.

[0014] To facilitate oil diversion, each of the air inlet holes on the ventilation area of the first oil net is a longitudinally extending strip hole. The design of the strip holes allows the walls of the first oil net located between two adjacent air inlet holes to divert oil to the rear side.

[0015] In order to effectively receive the oil dripping from the volute of the fan system, the fan system includes a volute and an impeller arranged in the volute, the axis of the impeller extends in the front-to-back direction, and the vertical projection of the lowest position of the volute falls on the oil guide plate of the first oil net.

[0016] In order to achieve the installation and connection of the first oil net, the front end of the oil guide plate has a connecting plate that is folded and extended upward, and the connecting plate is connected to the front side wall of the volute.

[0017] Generally, the first oil net can be arranged in the smoke hood, or in the fan rack, or the first oil net can occupy the internal space of the fan rack and the smoke hood together. However, in order to avoid affecting the installation of other components in the fan rack or the smoke hood, the first oil net is preferably installed at the position where the fan rack and the smoke hood are connected, that is, the following arrangement is adopted: the bottom of the fan rack has an opening connected to the smoke hood, and the first oil net is arranged at the opening.

[0018] In order to further improve the oil fume separation effect, the front side wall of the fume hood is inclined backward from top to bottom, and an air inlet is opened on it, and a second oil net is provided at the air inlet.

[0019] In order to take into account the cooking conditions of the left and right burners, the air inlet is a long strip opening extending along the left and right directions, and the second oil net is also a long strip net extending along the left and right directions.

[0020] In order to reduce the flow resistance of the airflow entering the fan frame from the air inlet, the smoke hood is also provided with a first guide plate corresponding to the left side of the air inlet and a second guide plate corresponding to the right side of the air inlet. The first guide plate includes a first shielding portion parallel to the plane where the air inlet is located and a first guide portion connected to the first shielding portion and inclined backward from left to right. The second guide plate includes a second shielding portion parallel to the plane where the air inlet is located and a second guide portion connected to the second shielding portion and inclined backward from right to left.

[0021] As an improvement, in order to further provide a diversion effect, the rear side edge of the first shielding portion of the first deflector is connected to the rear side wall of the smoke hood, and the left and right dimensions of the first shielding portion gradually decrease from back to front, and the rear side edge of the second shielding portion of the second deflector is connected to the rear side wall of the smoke hood, and the left and right dimensions of the second shielding portion gradually decrease from back to front.

[0022] Compared with the existing technology, the advantages of the present invention are: the oil guide plate extending longitudinally on the first oil net can smoothly guide the received oil backwards, preventing the oil on the fan system from dripping directly onto the stove. The left and right sides of the oil guide plate of the first oil net are ventilation areas with air inlet holes. The two ventilation areas are inclined from the position of the oil guide plate to the left and right sides toward the side where the fan system is located, so that the first oil net is V-shaped as a whole. The structural design of this V-shaped oil net can guide the airflow to the left and right sides, and then guide it to the location of the fan system, reducing the flow resistance of the smoke, and can effectively reduce the eddy current phenomenon caused by being close to the fan system, improve the noise problem, and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a range hood according to an embodiment of the present utility model;

[0024] Figure 2 A vertical cross-sectional view of the range hood according to an embodiment of the present invention taken along the front-to-back direction;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the range hood according to the embodiment of the utility model after the smoke baffle and the second oil net are omitted;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the first oil screen according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0029] Figures 1-4A preferred embodiment of the range hood of the present invention is shown. The range hood includes a casing and a centrifugal fan disposed within the casing. The casing generally includes a fan frame 10 and a fume hood 11 disposed at the bottom of the fan frame 10. The inner cavity of the fan frame 10 is connected to the inner cavity of the fume hood 11. An air inlet 110 is provided on the front side wall of the fume hood 11. The air inlet 110 is a strip-shaped opening extending in the left-right direction, through which external smoke can enter the fume hood 11. The front side wall of the fume hood 11 is tilted backward from top to bottom, and the rear side wall of the fume hood 11 extends vertically so that it can be mounted against a wall. The centrifugal fan is disposed within the fan frame 10. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood 11 through the air inlet 110. A second oil net 30 is also provided at the air inlet 110 of the smoke hood 11. The second oil net 30 is also a long strip of net arranged in the left-right direction, which is used to filter oil smoke. An oil cup 14 is provided at the bottom of the smoke hood 11. The oil cup 14 is a long strip extending left and right, which is used to receive the oil stains flowing down from the smoke hood 11. The front part of the smoke hood 11 is also provided with a smoke baffle 13 that can be deflected forward and backward relative to the smoke hood 11. The smoke baffle 13 is connected to the main body of the smoke hood 11 through a hinge motion mechanism. Specifically, it can be deflected forward to open the above-mentioned air inlet 110 and deflected backward to block and close the above-mentioned air inlet 110. The hinge motion mechanism used to drive the deflection of the smoke baffle 13 can adopt a conventional hinge motion mechanism in the prior art, which will not be described here.

[0030] See also Figure 1 The left-right dimension of the smoke hood 11 is larger than that of the fan rack 10. As a result, the smoke hood 11 forms two shoulders on the left and right sides of the fan rack 10. The bottom of the fan rack 10 has an opening 100 that communicates with the smoke hood 11. The two shoulders are located on the left and right sides of the opening 100 of the fan rack 10.

[0031] The length of the air inlet 110 provided on the front side wall of the smoke hood 11 is greater than the size of the opening 100 of the fan rack 10. To guide the airflow entering from the air inlet 110 toward the opening 100 of the fan rack 10 and reduce the flow resistance of the airflow from the air inlet 110 into the interior of the fan rack 10, the smoke hood 11 is further provided with a first deflector 41 corresponding to the left side of the air inlet 110 and a second deflector 42 corresponding to the right side of the air inlet 110. The first deflector 41 includes a first shielding portion 411 parallel to the plane of the air inlet 110 and a first deflector portion 412 connected to the first shielding portion 411 and tilted backward from left to right. The first shielding portion 411 is triangular and blocks the upper left corner of the air inlet 110. The junction between the first shielding portion 411 and the first deflector portion 412 is a straight edge tilted upward from left to right. The rear side of the first shielding portion 411 of the first deflector 41 is connected to the rear side wall of the smoke hood 11, and the left and right dimensions of the first shielding portion 411 gradually decrease from the back to the front. Similarly, the second deflector 42 includes a second shielding portion 421 parallel to the plane where the air inlet 110 is located, and a second deflector 422 connected to the second shielding portion 421 and tilted backward from right to left. The second shielding portion 421 is triangular and blocks the upper right corner area of the air inlet 110. The position where the second shielding portion 421 and the second deflector 422 meet is a straight edge tilted upward from right to left. The rear side of the second shielding portion 421 of the second deflector 42 is connected to the rear side wall of the smoke hood 11, and the left and right dimensions of the second shielding portion 421 gradually decrease from the back to the front.

[0032] See also Figure 2 and Figure 3 A first oil screen 20 is also provided at the bottom opening 100 of the fan frame 10, located below the fan system 12. The first oil screen 20 is generally tilted downward from front to back. Specifically, it comprises a longitudinally extending oil deflector plate 21 and ventilation areas 22, each with air inlet holes 220, located on either side of the oil deflector plate 21. The two ventilation areas 22 are tilted from the oil deflector plate 21 to the left and right sides, respectively, toward the fan system 12, giving the first oil screen 20 an overall V-shape. The "longitudinal" in the aforementioned "longitudinal extending oil deflector plate 21" should be understood as a direction substantially perpendicular to the left-right direction. Therefore, the oil deflector plate 21 also tilts downward from front to back. To further reduce airflow resistance at the oil deflector plate 21, the cross-section of the oil deflector plate 21 is an arc-shaped structure that bulges away from the fan system 12.

[0033] Each air inlet hole on the two ventilation areas 22 of the first oil net 20 is a longitudinally extending strip hole, that is, the extension direction of the strip hole is consistent with the length direction of the oil guide plate 21. The design of the above-mentioned strip holes allows the walls of the two adjacent air inlet holes on the first oil net 20 to also guide oil to the rear side.

[0034] The fan system 12 includes a volute 121, an impeller 122 disposed within the volute 121, and a motor 123. The impeller 122 is driven for rotation by the motor 123. In this embodiment, the axis of the impeller 122 extends in the front-to-back direction, and the lowest point of the annular wall of the volute 121 also extends in the front-to-back direction. The vertical projection of the lowest point of the volute 121 falls on the oil deflector 21 of the first oil screen 20.

[0035] The front end of the oil guide plate 21 has a connecting plate 23 that is folded and extended upward. During installation, the connecting plate 23 can be fixed to the front side wall of the volute 121.

[0036] See also Figure 2 The vertical projection of the rear side of the first oil net 20 falls within the oil cup 14, so that oil dripping from the first oil net 20 falls into the oil cup 14. Of course, the rear side of the first oil net 20 can also be connected to the rear side wall of the fan frame 10 or the rear side wall of the fume hood 11, so that the oil from the oil net is collected into the oil cup 14 below through the rear side wall.

[0037] The range hood of this embodiment is equipped with two oil screens along the air inlet path, effectively improving grease separation efficiency. In particular, after the first oil screen 20 is installed at the bottom of the fan system 12, when the user removes the second oil screen 30 at the air inlet 110, the fan system 12 is not directly visible, thus improving its aesthetics to a certain extent.

[0038] The oil guide plate 21 extending longitudinally on the first oil net 20 can smoothly guide the received oil backward to prevent the oil on the fan system 12 from dripping directly onto the stove. The left and right sides of the oil guide plate 21 of the first oil net 20 are ventilation areas 22 with air inlet holes 220. The two ventilation areas 22 are respectively inclined from the position of the oil guide plate 21 to the left and right sides toward the side where the fan system 12 is located, so that the first oil net 20 is V-shaped as a whole. The structural design of this V-shaped oil net can guide the airflow to the left and right sides, and then guide it to the position of the fan system 12, reducing the flow resistance of the smoke, and can effectively reduce the eddy current phenomenon caused by being close to the fan system 12, improve the noise problem, and enhance the user experience.

Claims

1. A range hood comprising: A fan frame (10) having a fan system (12) disposed therein; A smoke collecting hood (11) is connected to the bottom of the fan frame (10) and is in communication with the fan frame (10), and an air inlet (110) is provided on the front side of the smoke collecting hood (11); The invention is characterized in that: a first oil net (20) is further provided at a position below the fan system (12) in the fan frame (10) and / or the smoke collecting hood (11), and is tilted downward from the front to the back as a whole; the first oil net (20) comprises a longitudinally extending oil guide plate (21) and ventilation areas (22) on the left and right sides of the oil guide plate (21) and having air inlet holes (220) distributed thereon; the two ventilation areas (22) are tilted from the position of the oil guide plate (21) to the left and right sides respectively toward the side where the fan system (12) is located, so that the first oil net (20) is V-shaped as a whole; The front side wall of the smoke collecting hood (11) is inclined backward from top to bottom, and is provided with an air inlet (110). A second oil net (30) is provided at the air inlet (110).

2. The range hood according to claim 1, characterized in that: The cross section of the oil guide plate (21) is an arc-shaped structure that bulges toward the side away from the fan system (12).

3. The range hood according to claim 1, wherein: Each of the air inlet holes on the ventilation area (22) of the first oil net (20) is a longitudinally extending strip-shaped hole.

4. The range hood according to claim 1, wherein: The fan system (12) includes a volute (121) and an impeller (122) disposed in the volute (121). The axis of the impeller (122) extends in a front-to-back direction. The vertical projection of the lowest position of the volute (121) falls on the oil guide plate (21) of the first oil net (20).

5. The range hood according to claim 4, characterized in that: The front end of the oil guide plate (21) is provided with a connecting plate (23) that is folded and extended upwards, and the connecting plate (23) is connected to the front side wall of the volute (121).

6. The range hood according to claim 1, characterized in that: The bottom of the fan frame (10) has an opening (100) connected to the smoke collecting hood (11), and the first oil net (20) is arranged at the opening (100).

7. The range hood according to any one of claims 1 to 6, characterized in that: The air inlet (110) is a long strip-shaped opening extending in the left-right direction, and the second oil net (30) is also a long strip-shaped net extending in the left-right direction.

8. The range hood according to claim 7, characterized in that: The smoke hood (11) is further provided with a first guide plate (41) corresponding to the left side of the air inlet (110) and a second guide plate (42) corresponding to the right side of the air inlet (110), wherein the first guide plate (41) comprises a first shielding portion (411) parallel to the plane where the air inlet (110) is located, and a first guide plate (412) connected to the first shielding portion (411) and tilted backward from left to right, and the second guide plate (42) comprises a second shielding portion (421) parallel to the plane where the air inlet (110) is located, and a second guide plate (422) connected to the second shielding portion (421) and tilted backward from right to left.

9. The range hood according to claim 8, characterized in that: The rear side of the first shielding portion (411) of the first deflector (41) is connected to the rear side wall of the smoke hood (11), and the left and right dimensions of the first shielding portion (411) gradually decrease from the back to the front. The rear side of the second shielding portion (421) of the second deflector (42) is connected to the rear side wall of the smoke hood (11), and the left and right dimensions of the second shielding portion (421) gradually decrease from the back to the front.

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