Range hood

Abstract

The utility model relates to a range hood, which comprises a casing, an air inlet arranged on the front side wall of the casing and extending along the left-right direction; the air inlet comprises a first air inlet area and a second air inlet area which are sequentially arranged left and right, the first air inlet area is provided with a first oil net, the second air inlet area is provided with a second oil net, and the first oil net and the second oil net are both configured to be arc-shaped oil nets which gradually protrude forwards from the left side and the right side to the middle. The first oil screen and the second oil screen at the air inlet of the range hood adopt the arc-shaped oil screens which protrude forwards from the left side and the right side to the middle part, and due to the structural design of the arc-shaped oil screens, on one hand, the ventilation area can be increased as much as possible, and on the other hand, the air inlet resistance can be effectively reduced, the oil smoke discharge is accelerated, and the oil smoke suction effect is improved.

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 one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. A centrifugal fan installed inside the range hood absorbs and exhausts oil fumes, and uses a filter to filter out some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil fumes under the range hood into the fan. After being accelerated by the fan, the fumes are collected by the volute and guided to be discharged outdoors.

[0003] Common range hoods on the market include top suction type and side suction type. The power source of the side suction range hood is closer to the stove, and most of the oil smoke close to the stove is sucked away in an arc. Its advantages are thin body and not easy to bump your head during operation. When cooking with a small amount of oil smoke, due to its low installation height, the negative pressure area is closer to the smoke source, and the oil smoke suction effect is good. Existing side suction range hoods usually have an air inlet on the panel. In order to ensure the oil smoke filtering effect, an oil mesh grille is usually set at the air inlet. For example, the Chinese utility model patent application with application number CN202120716870.4 (authorization announcement number: CN215570678U) discloses this range hood.

[0004] However, the above-mentioned range hood still has certain shortcomings: due to the fact that the oil mesh grille is set at the air inlet of the range hood, the effective air inlet area of ​​the air inlet is reduced, the air inlet resistance is increased, and the oil fume suction and exhaust effect is affected. In particular, the structure of multiple oil mesh grilles is set on the air inlet path of the range hood, the oil fume suction effect is seriously affected. Therefore, the existing solution is mostly to adopt a higher-power fan system, which leads to an increase in the size of the range hood and an increase in noise during operation.

[0005] Therefore, existing range hoods need further improvement. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a range hood which can effectively reduce the wind resistance of the oil net and improve the oil fume extraction effect in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the above technical problems is:

[0008] A range hood, comprising:

[0009] The casing has a front side wall with an air inlet extending in the left-right direction;

[0010] The air inlet includes a first air inlet area and a second air inlet area arranged in sequence from left to right. The first air inlet area is provided with a first oil screen, and the second air inlet area is provided with a second oil screen. Both the first oil screen and the second oil screen are configured as arc-shaped oil screens that gradually protrude forward from their left and right sides to the middle.

[0011] For the purpose of further reducing the air inlet resistance and facilitating oil drainage, the first oil screen is distributed with first ventilation holes arranged in sequence along the length direction of the first oil screen. Each of the first ventilation holes is a strip-shaped hole extending along the width direction of the first oil screen.

[0012] The second oil screen is distributed with second ventilation holes arranged in sequence along the length direction of the second oil screen. Each of the second ventilation holes is a strip-shaped hole extending along the width direction of the second oil screen.

[0013] For the installation of the first oil screen and the second oil screen, a wind guide plate is further provided in the area between the first oil screen and the second oil screen at the air inlet.

[0014] For the purpose of guiding the air flow to the areas where the oil screens on the left and right sides are located and reducing the air inlet resistance, the wind guide plate is integrally an arc-shaped plate that gradually protrudes forward from its left and right sides to the middle.

[0015] As an improvement, the wind guide plate, the first oil screen and the second oil screen are integrally designed. It can be imagined that the wind guide plate, the first oil screen and the second oil screen can also be separate components, which are spliced and installed at the air inlet.

[0016] Generally, the front side wall of the machine shell can extend vertically. Preferably, the front side wall of the machine shell is inclined backward from top to bottom.

[0017] For the purpose of improving the oil fume filtration effect and reducing the air inlet resistance, the machine shell includes a fan frame and a smoke collecting hood. A fan system is provided inside the fan frame. The smoke collecting hood is connected to the bottom of the fan frame and is in communication with the fan frame. The air inlet described above is opened on the front side of the smoke collecting hood. A third oil screen that is generally inclined downward from front to back is further provided at a position below the fan system in the machine shell. The third oil screen includes a longitudinally extending oil guide plate and ventilation areas located on the left and right sides of the oil guide plate, on which third ventilation holes are distributed. The two ventilation areas are inclined from the position where the oil guide plate is located to the left and right sides toward the side where the fan system is located, so that the overall shape of the first oil screen is V-shaped.

[0018] The "longitudinal" in the above-mentioned "longitudinally extending oil guide plate" can be understood as the direction that is basically perpendicular to the left and right directions. Thus, the inclination direction of the oil guide plate is also inclined downward from front to back.

[0019] In order to effectively receive the oil dripping from the volute of the fan system, the fan system includes a volute and an impeller disposed inside the volute. The axis of the impeller extends in the front-rear direction, and the positive projection in the vertical direction of the lowest position of the volute falls on the oil guide plate of the third oil screen.

[0020] In order to further reduce the air inlet resistance and facilitate oil guiding, each of the third ventilation holes in the ventilation area of the third oil screen is a strip-shaped hole extending longitudinally.

[0021] In order to further reduce the air inlet resistance when the air flow passes through the oil guide plate, the cross-section of the oil guide plate is an arc-shaped structure protruding toward the side away from the fan system.

[0022] Compared with the prior art, the advantages of the present utility model are as follows: The first oil screen and the second oil screen at the air inlet of the range hood both adopt arc-shaped oil screens protruding forward from the left and right sides to the middle. Such a structural design of the arc-shaped oil screen can, on the one hand, increase the ventilation area as much as possible, and on the other hand, effectively reduce the air inlet resistance, accelerate the external discharge of oil fume, and improve the oil fume extraction effect. In the preferred solution, the setting of the third oil screen inside the casing improves the oil screen filtering effect. Its structural design of a V-shaped oil screen can make the air flow deflect to the left and right sides and then be guided to the position where the fan system is located, reducing the flow resistance of the flue gas, 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 is a three-dimensional structural schematic diagram of the range hood according to an embodiment of the present utility model;

[0024] Figure 2 is a partial structural exploded view of the range hood according to an embodiment of the present utility model;

[0025] Figure 3 is a vertical sectional view of the range hood according to an embodiment of the present utility model cut along the front-rear direction;

[0026] Figure 4 is a three-dimensional structural schematic diagram of the range hood according to an embodiment of the present utility model with the oil screen at the air inlet removed;

[0027] Figure 5 is a three-dimensional structural schematic diagram of the third oil screen according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following further describes the present utility model in detail with reference to the accompanying drawings and embodiments.

[0029] In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present utility model. However, the use of these terms here is only for the purpose of convenient description and is determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed by the present utility model can be arranged in different directions, these terms indicating directions are only for illustration 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.

[0030] Figures 1 - 5 Figures 1 - 5 shows a preferred embodiment of the range hood of the present utility model. The range hood includes a casing and a centrifugal fan disposed inside the casing. The casing generally includes a fan frame 10 and a smoke collecting hood 11 disposed at the bottom of the fan frame 10. The inner cavity of the fan frame 10 is communicated with the inner cavity of the smoke collecting hood 11. An air inlet 110 is formed on the front side wall of the smoke collecting hood 11. The air inlet 110 is a strip-shaped opening extending in the left-right direction, and external flue gas can enter the smoke collecting hood 11 through the air inlet 110. The front side wall of the smoke collecting hood 11 slopes backward from top to bottom, and the rear side wall of the smoke collecting hood 11 extends vertically for wall-mounted installation. The centrifugal fan is disposed inside the fan frame 10. When the centrifugal fan operates, a negative pressure is generated, and external cooking fumes can be sucked into the smoke collecting hood 11 through the air inlet 110. An oil net assembly is also provided at the air inlet 110 of the smoke collecting hood 11 for filtering cooking fumes. An oil cup 14 is provided at the bottom of the smoke collecting hood 11. The oil cup 14 is a long strip extending in the left-right direction for receiving the oil stains flowing down from the smoke collecting hood 11. A smoke baffle 13 that can deflect forward and backward relative to the smoke collecting hood 11 is further provided at the front part of the smoke collecting hood 11. The smoke baffle 13 is connected to the main body of the smoke collecting hood 11 through a hinge movement mechanism and can specifically deflect forward to open the above-mentioned air inlet 110 and deflect backward to block and close the above-mentioned air inlet 110. The hinge movement mechanism for driving the deflection of the smoke baffle 13 can adopt a conventional hinge movement mechanism in the prior art and will not be elaborated here.

[0031] The air inlet 110 includes a first air inlet area 1101 and a second air inlet area 1102 arranged in sequence from left to right. The oil screen assembly at the air inlet 110 includes a first oil screen 31 and a second oil screen 32 arranged in sequence from left to right, and a wind guide plate 33 located between the first oil screen 31 and the second oil screen 32. Among them, the first oil screen 31 is located in the first air inlet area 1101 of the air inlet 110, and the second oil screen 32 is located in the second air inlet area 1102 of the air inlet 110. Both the first oil screen 31 and the second oil screen 32 are configured as arc-shaped oil screens that gradually protrude forward from their left and right sides to the middle. With the structural design of the arc-shaped oil screen, on the one hand, the ventilation area can be increased as much as possible, and on the other hand, the air inlet resistance can be effectively reduced, accelerating the external discharge of oil fume and improving the oil fume extraction effect. The first oil screen 31 is distributed with first ventilation holes 310 arranged in sequence along the length direction of the first oil screen 31, and each first ventilation hole 310 is a strip-shaped hole extending along the width direction of the first oil screen 31. Similarly, the second oil screen 32 is distributed with second ventilation holes 320 arranged in sequence along the length direction of the second oil screen 32, and each second ventilation hole 320 is a strip-shaped hole extending along the width direction of the second oil screen 32. The dimensions of the first oil screen 31 and the second oil screen 32 in the up and down direction are the same as the dimensions of the wind guide plate 33 in the up and down direction, while the dimensions of the first oil screen 31 and the second oil screen 32 in the left and right direction are much larger than the dimensions of the wind guide plate 33 in the left and right direction. The wind guide plate 33 is an arc-shaped plate that gradually protrudes forward from its left and right sides to the middle as a whole, so that it can guide the air flow to the areas where the oil screens on the left and right sides are located, further reducing the air inlet resistance.

[0032] See Figure 1 , the left and right dimensions of the smoke collecting hood 11 are larger than the left and right dimensions of the fan frame 10. Thus, the smoke collecting hood 11 forms two shoulders on the left and right sides relative to the fan frame 10. The bottom of the fan frame 10 has an opening 100 communicating with the smoke collecting hood 11, and the above two shoulders are located on the left and right sides of the opening 100 of the fan frame 10.

[0033] The length of the air inlet 110 formed on the front side wall of the smoke collecting hood 11 is greater than the size of the opening 100 of the fan frame 10. In order to guide the airflow entering from the air inlet 110 towards the opening 100 of the fan frame 10 and reduce the flow resistance of the airflow entering the interior of the fan frame 10 from the air inlet 110, 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 are further provided in the smoke collecting hood 11. Among them, the first deflector 41 includes a first shielding portion 411 parallel to the plane where the air inlet 110 is located and a first deflecting portion 412 connected to the first shielding portion 411 and inclined backward from left to right. The first shielding portion 411 is triangular and shields the upper left corner area of the air inlet 110. The position where the first shielding portion 411 is connected to the first deflecting portion 412 is a straight edge inclined upward from left to right. The rear side edge of the first shielding portion 411 of the first deflector 41 is connected to the rear side wall of the smoke collecting hood 11, and the left and right dimensions of the first shielding portion 411 gradually decrease from back to 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 deflecting portion 422 connected to the second shielding portion 421 and inclined backward from right to left. The second shielding portion 421 is triangular and shields the upper right corner area of the air inlet 110. The position where the second shielding portion 421 is connected to the second deflecting portion 422 is a straight edge inclined upward from right to left. The rear side edge of the second shielding portion 421 of the second deflector 42 is connected to the rear side wall of the smoke collecting hood 11, and the left and right dimensions of the second shielding portion 421 gradually decrease from back to front.

[0034] See Figure 4 and Figure 5 , a third oil screen 20 is further provided at the bottom opening 100 of the fan frame 10, and the third oil screen 20 is located below the fan system 12. The third oil screen 20 is inclined downward from front to back as a whole. Specifically, it includes a longitudinally extending oil guiding plate 21 and ventilation areas 22 located on the left and right sides of the oil guiding plate 21, and third ventilation holes 220 are distributed on the ventilation areas 22. The two ventilation areas 22 are respectively inclined from the position where the oil guiding plate 21 is located to the left and right sides towards the side where the fan system 12 is located, so that the third oil screen 20 is in a V shape as a whole. The "longitudinally" in the above-mentioned "longitudinally extending oil guiding plate 21" can be understood as a direction substantially perpendicular to the left and right directions. Thus, the inclination direction of the oil guiding plate 21 is also inclined downward from front to back. In order to further reduce the air inlet resistance when the airflow passes through the oil guiding plate 21, the cross section of the oil guiding plate 21 is an arc-shaped structure protruding towards the side away from the fan system 12.

[0035] Each of the third ventilation holes 220 on the two ventilation areas 22 of the third oil screen 20 is a longitudinally extending strip-shaped hole, that is, the extending direction of the strip-shaped hole is consistent with the length direction of the oil guiding plate 21. The design of the above-mentioned strip-shaped holes enables the walls of the third oil screen 20 located between two adjacent ventilation holes to also guide oil backward.

[0036] The blower system 12 includes a volute 121, an impeller 122 disposed within the volute 121, and a motor 123. The impeller 122 is driven by the motor 123 to rotate. In this embodiment, the axis of the impeller 122 extends in the front-rear direction, and the lowest position of the annular wall of the volute 121 also extends in the front-rear direction. Among them, the positive projection of the lowest position of the volute 121 in the vertical direction falls on the oil guide plate 21 of the third oil screen 20.

[0037] The front end of the oil guide plate 21 has a connecting plate 23 that folds upward and extends. During installation, the connecting plate 23 can be fixedly attached to the front side wall of the volute 121.

[0038] See Figure 3 , the positive projection of the rear side edge of the third oil screen 20 in the vertical direction falls within the oil cup 14, so that the oil droplets dripping from the third oil screen 20 fall into the oil cup 14. Of course, the rear side edge of the third oil screen 20 can also be connected to the rear side wall of the blower frame 10 or the rear side wall of the smoke collecting hood 11, so that the oil screen is collected to the lower oil cup 14 through the above-mentioned rear side wall.

[0039] In this embodiment of the range hood, two oil screens are provided on the air inlet path, which can effectively improve the grease separation efficiency. Especially after the third oil screen 20 is provided at the bottom of the blower system 12, when the user removes the second oil screen 30 at the air inlet 110, the blower system 12 will not be directly visible, which improves its aesthetics to a certain extent. The longitudinally extending oil guide plate 21 on the third oil screen 20 can smoothly guide the received oil liquid backward, preventing the oil liquid on the blower system 12 from directly dripping onto the stove. Among them, the left and right sides of the oil guide plate 21 of the third oil screen 20 are ventilation areas 22 distributed with third ventilation holes 220. The two ventilation areas 22 are respectively inclined from the position where the oil guide plate 21 is located to the left and right sides toward the side where the blower system 12 is located, so that the third oil screen 20 is integrally V-shaped. This structural design of the V-shaped oil screen can guide the air flow to the left and right sides and then to the position where the blower system 12 is located, reducing the flow resistance of the flue gas, and can effectively reduce the vortex phenomenon caused by being close to the blower system 12, improving the noise problem and enhancing the user experience.

Claims

1. A range hood, comprising: The casing has a front side wall with an air inlet (110) extending in the left-right direction; The invention is characterized in that: the air inlet (110) comprises a first air inlet area (1101) and a second air inlet area (1102) which are arranged in sequence on the left and right; the first air inlet area (1101) is provided with a first oil net (31); the second air inlet area (1102) is provided with a second oil net (32); the first oil net (31) and the second oil net (32) are both constructed as arc-shaped oil nets which gradually bulge forward from the left and right sides to the middle.

2. The range hood according to claim 1, characterized in that: The first oil net (31) is provided with first ventilation holes (310) arranged in sequence along the length direction of the first oil net (31), and each of the first ventilation holes (310) is a strip-shaped hole extending along the width direction of the first oil net (31); The second oil net (32) is provided with second ventilation holes (320) arranged in sequence along the length direction of the second oil net (32), and each of the second ventilation holes (320) is a strip-shaped hole extending along the width direction of the second oil net (32).

3. The range hood according to claim 1, characterized in that: An air guide plate (33) is also provided in the area between the first oil net (31) and the second oil net (32) at the air inlet (110).

4. The range hood according to claim 3, characterized in that: The wind guide plate (33) is generally an arc-shaped plate that gradually protrudes forward from its left and right sides to its middle part.

5. The range hood according to claim 3, characterized in that: The air guide plate (33), the first oil net (31) and the second oil net (32) are designed as an integral whole.

6. The range hood according to claim 1, characterized in that: The front side wall of the housing is inclined backward from top to bottom.

7. The range hood according to any one of claims 1 to 6, characterized in that: The casing comprises a fan frame (10) and a smoke collecting hood (11), wherein a fan system (12) is arranged inside the fan frame (10), the smoke collecting hood (11) is connected to the bottom of the fan frame (10) and is in communication with the fan frame (10), the front side of the smoke collecting hood (11) is provided with the air inlet (110), and a third oil net (20) which is tilted downward from front to back as a whole is arranged at a position below the fan system (12) in the casing, the third oil net (20) comprises a longitudinally extending oil guide plate (21) and ventilation areas (22) which are located on left and right sides of the oil guide plate (21) and have third ventilation holes (220) distributed thereon, the two ventilation areas (22) tilt from the position of the oil guide plate (21) to the left and right sides respectively towards the side where the fan system (12) is located, so that the first oil net (31) is V-shaped as a whole.

8. The range hood according to claim 7, characterized in that: The fan system (12) comprises a volute (121) and an impeller (122) disposed in the volute (121); the axis of the impeller (122) extends in a front-rear direction; the vertical projection of the lowest position of the volute (121) falls on the oil guide plate (21) of the third oil net (20).

9. The range hood according to claim 7, characterized in that: Each of the third ventilation holes on the ventilation area (22) of the third oil net (20) is a strip-shaped hole extending longitudinally.

10. The range hood according to claim 7, 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).

Images