A range hood

Abstract

This utility model discloses a range hood, comprising: an air inlet body with a front panel on its front side, wherein a smoke inlet is formed on the front panel; and a smoke baffle that can open and close the smoke inlet; a smoke-gathering chamber is formed in the air inlet body in front of the smoke inlet; when the smoke baffle is in the open state, the angle between the smoke baffle and the front panel is α, and satisfies 80°<α<100°. Compared with the prior art, the advantages of this utility model are: by forming a concave smoke-gathering chamber in the air inlet body, the structure of the smoke baffle and the front panel (smoke inlet) being basically perpendicular can ensure low air intake resistance, and the smoke baffle has a longer effective airflow guiding distance, which is conducive to the formation of a stable flow field. Thus, the range hood effect is improved under the premise of a higher mounting height and a smaller smoke-gathering area.

Description

Technical Field

[0001] This utility model relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Chinese cooking produces a lot of oil fumes. In order to maintain a clean kitchen environment and human health, range hoods have become an essential piece of equipment in modern family kitchens. As the application rate of range hoods increases, people are paying more and more attention to the oil fume extraction effect of range hoods.

[0003] To improve the smoke extraction effect, range hoods mainly enhance it in three ways: ① increasing airflow and air pressure, such as by increasing fan speed and size; ② lowering the air inlet height, such as in lift-type range hoods; ③ increasing the smoke-enclosing area, such as by increasing the length of the smoke baffle. However, these methods have the following problems: increasing airflow and air pressure leads to increased noise, affecting the user experience, and in well-sealed kitchens, the increased negative pressure can cause some discomfort; lowering the air inlet height and increasing the smoke-enclosing area can affect the user's cooking operations. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a range hood that ensures effective smoke extraction while giving users more cooking space.

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

[0006] An air inlet body has a front panel on its front side, and a smoke inlet is formed on the front panel; and

[0007] A smoke baffle that can open and close the smoke inlet;

[0008] Its features are:

[0009] The air inlet body has a smoke collection chamber formed on the front side of the smoke inlet;

[0010] When the smoke baffle is in the open state, the included angle between the smoke baffle and the front panel is α, and satisfies 80° < α < 100°.

[0011] By forming a concave smoke-collecting cavity in the air inlet, and with the smoke baffle and the front panel (smoke inlet) being basically perpendicular, the air intake resistance can be reduced, and the smoke baffle has a longer effective flow guiding distance, which is conducive to the formation of a stable flow field. This achieves an improvement in the range hood's performance under the premise of a higher mounting height and a smaller smoke-collecting area.

[0012] Furthermore, in order to form a concave smoke collection cavity, the air inlet also includes side plates located on the left and right sides of the front panel. The front panel gradually slopes downward from front to back, and the front panel is higher than the bottom of the side plates at least at the front end, thereby forming the smoke collection cavity structure.

[0013] Furthermore, since the front panel allows smoke to enter, it will accumulate more oil. In order to shield the front panel from both sides, the bottom of the side panel needs to be lower than the front panel. Therefore, the bottom of the side panel also gradually slopes downward from front to back, and the tilt angle of the front panel is greater than the tilt angle of the bottom of the side panel.

[0014] Preferably, to form sufficient smoke collection chamber space, while reasonably controlling the height of the air inlet, the included angle between the bottom of the front panel and the side panel is β, and β < 30°.

[0015] Preferably, when the smoke baffle is in the open state, the angle between the smoke baffle and the horizontal plane is γ, and satisfies 120°<γ<140°.

[0016] By limiting the range of values ​​for the side plates, α, and γ as described above, the direction of the smoke inlet can be restricted, avoiding an excessively wide air inlet angle that would waste the range hood's airflow. At the same time, it ensures the replenishment of external air, forming a stable isolation flow field and preventing the escape of fumes.

[0017] Furthermore, the range hood also includes a plate, which is located above the smoke baffle when the smoke baffle is opened. The plate includes at least a longitudinal extension, which corresponds to the front side of the smoke collection chamber and defines the front boundary of the smoke collection chamber.

[0018] The longitudinal extension is configured as a convex structure that guides the airflow. This longitudinal extension can extend the airflow path, create a local high-speed low-pressure flow field, build a pressure difference with the area below, provide upward pull, and prevent the escape of oil fumes.

[0019] Preferably, the range hood further includes a housing, the air inlet being at least partially below the bottom of the housing and exposed outside the housing, the housing including a fixed panel located at the bottom front side, the upper end of the smoke baffle being located below the fixed panel when the smoke baffle is open, and the longitudinal extension of the baffle being located at the rear end of the fixed panel.

[0020] Furthermore, to facilitate fixing the plate, the plate also includes a lateral extension fixed to the upper surface of the fixing panel, the longitudinal extension being formed by extending upward from the rear end of the lateral extension.

[0021] Furthermore, the range hood also includes a housing, with the air inlet at least partially protruding from the bottom of the housing. The housing includes a fixed panel located at the bottom front side, and when the smoke baffle is open, its upper end is below the fixed panel. The fixed panel serves to block cooking fumes, preventing fumes rising along the smoke baffle from escaping at this point.

[0022] Compared with the prior art, the advantages of this utility model are as follows: by forming a concave smoke-collecting cavity in the air inlet body, the structure of the smoke baffle and the front panel (smoke inlet) being basically perpendicular can ensure that the air intake resistance is small, and the smoke baffle has a longer effective flow guiding distance, which is conducive to the formation of a stable flow field. Thus, the range hood effect is improved under the premise of a higher hanging height and a smaller smoke-collecting area. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the range hood in the open state according to an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional view of the range hood in the open state according to an embodiment of the present utility model;

[0025] Figure 3 This is a cross-sectional side view of the range hood in the open state according to an embodiment of the present utility model;

[0026] Figure 4 for Figure 3 A magnified schematic diagram of part I. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction 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. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0029] See Figures 1-4 A range hood includes a housing 1, an air inlet 2, and a smoke baffle 3. The air inlet 2 is at least partially below the bottom of the housing 1 and protrudes from the housing 1. The air inlet 2 can be fixed or movable relative to the housing 1 (provided that the air inlet 2 can be movable, the air inlet 2 being at least partially below the bottom of the housing 1 and protruding from the housing 1 refers to the range hood in the working state). The housing 1 is used to house a fan (not shown).

[0030] The front of the air inlet 2 has a smoke inlet 21. "Front" refers to the side of the range hood facing the user when it is in operation. The smoke baffle 3 is installed at the bottom of the housing 1. It can open and close the smoke inlet 21. When it is in the open state, the smoke baffle 3 is located in front of the smoke inlet 21.

[0031] Specifically, the air intake 2 includes a front panel 23 on the front and side panels 22 on the left and right sides of the front panel 23. The smoke inlet 21 is formed on the front panel 23, and the side panels 22 extend along the front-rear direction of the range hood. A back panel 24 can be provided between the rear ends of the side panels 22 to form a closed smoke passage. The front panel 23 gradually slopes downward from front to back, and the bottom of the side panels 22 also gradually slopes downward from front to back. Preferably, since the front panel 23 receives smoke, it will accumulate more oil. In order to shield the front panel 23 on both sides, the bottom of the side panels 22 needs to be lower than the front panel 23. Therefore, the slope angle of the front panel 23 is greater than the slope angle of the bottom of the side panels 22. The front panel 23 is higher than the bottom of the side panels 22 at least at its front end, thereby forming a concave smoke collection chamber Q structure in the air intake 2. The smoke collection chamber Q is composed of the front panel 23 and the side panels 22.

[0032] The angle between the front panel 23 (smoke inlet 21) and the bottom of the side panel 22 is β, and β < 30°. When the smoke baffle 3 is open, the angle between it and the front panel 23 (smoke inlet 21) is α, and 80° < α < 100°. The near-vertical structure of the smoke baffle 3 and the front panel 23 (smoke inlet 21) ensures low airflow resistance, and the smoke baffle 3 has a longer effective airflow guiding distance, which is beneficial for the formation of a stable flow field. This achieves improved range hood performance under the premise of a relatively high mounting height and a small smoke collection area.

[0033] The angle between the smoke baffle 3 and the horizontal plane is γ, and satisfies 120°<γ<140°. By limiting the range of values ​​of the side plate 22, α, and γ as described above, the direction of the smoke inlet 21 can be limited, avoiding an excessively wide air inlet angle that would waste the range hood's airflow. At the same time, it ensures the replenishment of external air, forming a stable isolation flow field and preventing the escape of fumes.

[0034] The enclosure 1 includes a fixed panel 11 located at the bottom front side, on which functional modules 12, such as lights, cameras, or sensors, can be installed. When the smoke baffle 3 is open, its upper end is located below the fixed panel 11 and in front of the functional modules 12 to avoid affecting their normal function, such as blocking light. Furthermore, since the upper end of the smoke baffle 3 is located below the fixed panel 11, the fixed panel 11 can effectively block the oil fumes, preventing them from escaping.

[0035] A plate 13 is provided on the fixed panel 11 of the housing 1. The plate 13 includes at least a longitudinal extension 131 extending upward from the rear end of the fixed panel 11. The longitudinal extension 131 corresponds to the front side of the smoke collection chamber Q and can serve as a component defining the front boundary of the smoke collection chamber Q. The longitudinal extension 131 is configured as a convex structure for guiding airflow. The longitudinal extension 131 can extend the airflow path, forming a local high-speed low-pressure flow field at that location, creating a pressure difference with the area below, providing upward pull, and preventing the escape of oil fumes. The longitudinal extension 131 of the plate 13 is located at the rear end of the fixed panel 11. The plate 13 may also include a transverse extension 132 fixed to the upper surface of the fixed panel 11. The longitudinal extension 131 extends upward from the rear end of the transverse extension 132.

Claims

1. A range hood, comprising: The air inlet (2) has a front panel (23) on its front side, and a smoke inlet (21) is formed on the front panel (23); as well as A smoke baffle (3) that can open and close the smoke inlet (21); Its features are: The air inlet (2) has a smoke collection chamber (Q) formed in front of the smoke inlet (21); When the smoke baffle (3) is in the open state, the included angle between the smoke baffle (3) and the front panel (23) is α, and satisfies 80°<α<100°.

2. The range hood according to claim 1, characterized in that: The air inlet (2) also includes side panels (22) located on the left and right sides of the front panel (23). The front panel (23) gradually slopes downward from front to back. The front panel (23) is higher than the bottom of the side panel (22) at least at the front end, thereby forming the smoke collection chamber (Q) structure.

3. The range hood according to claim 2, characterized in that: The bottom of the side panel (22) also gradually slopes downward from front to back, and the tilt angle of the front panel (23) is greater than the tilt angle of the bottom of the side panel (22).

4. The range hood according to claim 3, characterized in that: The angle between the bottom of the front panel (23) and the side panel (22) is β, and β < 30°.

5. The range hood according to claim 2, characterized in that: When the smoke baffle (3) is in the open state, the angle between the smoke baffle (3) and the horizontal plane is γ, and satisfies 120°<γ<140°.

6. The range hood according to claim 1, characterized in that: The range hood also includes a plate (13). When the smoke baffle (3) is open, the plate (13) is located above the smoke baffle (3). The plate (13) includes at least a longitudinal extension (131), which corresponds to the front side of the smoke collection chamber (Q) and defines the front boundary of the smoke collection chamber (Q).

7. The range hood according to claim 6, characterized in that: The range hood also includes a housing (1), the air inlet (2) is at least partially below the bottom of the housing (1) and protrudes from the housing (1), the housing (1) includes a fixed panel (11) located at the bottom front side, the smoke baffle (3) is in the open state, the upper end of the smoke baffle (3) is located below the fixed panel (11), and the longitudinal extension (131) of the plate (13) is located at the rear end of the fixed panel (11).

8. The range hood according to claim 7, characterized in that: The plate (13) also includes a lateral extension (132) fixed to the upper surface of the fixed panel (11), and the longitudinal extension (131) extends upward from the rear end of the lateral extension (132).

9. The range hood according to claim 1, characterized in that: The range hood also includes a housing (1), the air inlet (2) is at least partially below the bottom of the housing (1) and protrudes from the housing (1), the housing (1) includes a fixed panel (11) located at the bottom front side, and when the smoke baffle (3) is open, the upper end of the smoke baffle (3) is located below the fixed panel (11).

Images