A range hood

Abstract

The utility model discloses a kind of range hood, comprising: upper box body component, it includes the first cooperation part in rear side;Air inlet body, it includes the second cooperation part in rear side, the air inlet body can be moved relative to upper box body component to have first state and second state, when the air inlet body is in first state, the air inlet body is at least partially placed in upper box body component, when the air inlet body is in second state, the air inlet body is at least partially lower than the bottom of upper box body component and expose in upper box body component;The range hood further includes sealing strip, the sealing strip includes with the fixed part of first cooperation part bottom, the first extension part extended downward by the rear side end of fixed part and the second extension part extended backward by the lower end of first extension part, when the air inlet body is in second state, the upper end of second cooperation part is located in the rear side of the bottom of first cooperation part and is abutted on second extension part.

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. To maintain a clean kitchen environment and protect human health, range hoods have become an indispensable appliance in modern family kitchens. As the usage rate of range hoods increases, people are paying more and more attention to their fume extraction efficiency. If the distance between the range hood's air inlet and the area where the fumes are generated is large, the fume extraction path is longer, and the extraction time is increased, making it easier for fumes to escape during cooking. On the other hand, if the installation height of the range hood is lowered and the air inlet is placed as close to the source of the fumes as possible, the negative pressure will expand downwards, which can improve the fume extraction efficiency, but it will result in a smaller cooking space. The cook's head may accidentally hit the fume hood. In addition, a lower installation height will also affect the view and the overall appearance of the kitchen.

[0003] To address this, a new type of lift-type range hood has been developed, where the air intake can be raised and lowered; it descends when the hood is on and rises when it is off. For example, Chinese Patent Application No. 202310591483.6 discloses a concealed range hood, comprising a main body, a flip-up shell, and a smoke-gathering plate. The bottom of the main body has an opening; the flip-up shell rotates with the main body to flip into or out of the opening, forming a flue between the flip-up shell and the main body, and the flip-up shell has a smoke inlet communicating with the flue; the smoke-gathering plate is movably connected to the flip-up shell to block or release the smoke inlet and gather the smoke below it. In this type of range hood, the flip-up shell and the smoke-gathering plate each require independent drive mechanisms, resulting in a complex structure and high cost.

[0004] Another example is a range hood with a movable smoke hood disclosed in Chinese Patent Application No. 201821250086.3, which includes a main smoke hood and a movable smoke hood. The main smoke hood has a main smoke chamber inside, and the upper part of the movable smoke hood extends into the main smoke hood. The movable smoke hood has a movable smoke chamber that communicates with the main smoke chamber. The outer surface of the movable smoke hood has a movable smoke outlet that communicates with the movable smoke chamber. The movable smoke hood and the main smoke hood move up and down and swing together.

[0005] These range hoods achieve both aesthetic appeal and effective smoke extraction in the kitchen. However, none of them consider the sealing between the relatively moving housings to prevent smoke escape and potential pressure loss. Other technologies exist in this field that can provide sealing, such as using a single felt, soft plastic, or rubber component. However, these sealing structures are ineffective and have the following problems: ① They fail when there is a large pressure difference between the two sides of the seal; ② Deformation under stress during installation leads to local seal failure or compression of the mating surfaces; ③ They require high positional accuracy of the relative movement of the housings and cannot accommodate large lateral deformations and longitudinal errors; ④ Extrusion during movement may produce abnormal noises.

[0006] Therefore, further improvements are needed. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a range hood that addresses the shortcomings of the existing technology, reduces the requirements for installation, achieves stable and reliable sealing, and reduces the requirements for the precision of the relative movement of the housing.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0009] Upper housing assembly, which includes a first mating part located on the rear side;

[0010] An air inlet body includes a second mating part located at the rear side. The air inlet body is movable relative to the upper housing assembly to have a first state and a second state. When the air inlet body is in the first state, the air inlet body is at least partially placed inside the upper housing assembly. When the air inlet body is in the second state, the air inlet body is at least partially lower than the bottom of the upper housing assembly and exposed outside the upper housing assembly.

[0011] Its features are:

[0012] The range hood also includes a sealing strip, which includes a fixing part fixed to the bottom of the first mating part, a first extension part extending downward from the rear end of the fixing part, and a second extension part extending rearward from the lower end of the first extension part. When the air inlet is in the second state, the upper end of the second mating part is located at the bottom rear side of the first mating part and abuts against the second extension part.

[0013] By setting a sealing strip at the bottom of the first mating part (upper rear plate) of the upper housing assembly, and making the sealing strip have a horizontal fixed part, a vertical first extension part and a horizontal second extension part, the second extension part is configured as a long cantilever structure. It can maintain the contact state with the second mating part even when the vertical position of the second mating part fluctuates through its own rotation, thereby always maintaining a sealed state. This reduces the installation requirements, achieves a stable and reliable seal, and reduces the requirements for the fitting accuracy of the relatively moving air inlet body.

[0014] Furthermore, the sealing strip also includes an inclined portion provided on the upper surface of the second extension portion. The inclined portion gradually slopes forward from bottom to top, and the side of the inclined portion facing the second mating portion is an inclined mating surface. When the air inlet is in the second state, the upper end of the second mating portion abuts against the mating surface.

[0015] By setting an inclined part, the inclined part and the long cantilever feature together form a cavity structure, which is connected to the open space behind the first mating part. When the range hood is working, the pressure at this point is greater than the pressure below the sealing strip. Under the action of the pressure difference, the mating surface is attached to the third longitudinal extension of the second mating part to achieve a reliable seal. The sealing performance is strengthened as the pressure difference increases, while providing a margin for the vertical and horizontal fluctuations of the second mating part.

[0016] Furthermore, the first mating part includes a first longitudinal extension extending in the vertical direction and a first transverse extension extending forward from the lower end of the first longitudinal extension, and the fixing part of the sealing strip is fixed to the first transverse extension;

[0017] The second mating part includes a second longitudinal extension extending in the vertical direction, a second transverse extension extending forward from the upper end of the second longitudinal extension, and a third longitudinal extension extending downward from the front end of the second transverse extension. When the air inlet is in the second state, the bottom surface of the third longitudinal extension abuts against the upper surface of the second extension of the sealing strip, while the front surface of the third longitudinal extension abuts against the mating surface of the sealing strip.

[0018] Thus, the first lateral extension facilitates the fixing of the sealing strip and the first mating part, and the third longitudinal extension facilitates the mating with the second extension and mating surface of the sealing strip.

[0019] Furthermore, the length of the second extension is L, the distance between the lower end of the inclined portion and the front end of the second extension is a, and a ≥ 0.5L is satisfied.

[0020] This allows the inclined portion to be positioned where the second extension has sufficient rotational deformation, so as to better engage with the second mating portion.

[0021] Furthermore, the included angle between the inclined portion and the second extended portion is α, and satisfies 45°≤α≤90°.

[0022] Therefore, tilting the inclined part within the above-mentioned angle range can better achieve the guiding function.

[0023] Furthermore, the gap width between the upper end of the inclined portion and the first extension portion is w, and w≥2mm.

[0024] This allows the cavity formed by the inclined section and the long cantilever feature to have sufficient clearance to communicate with the atmosphere in the open space behind the first mating section, thus maintaining high pressure.

[0025] Furthermore, the first mating part includes a first longitudinal extension extending in the vertical direction and a first transverse extension extending forward from the lower end of the first longitudinal extension, and the fixing part of the sealing strip is fixed to the first transverse extension;

[0026] The fixing part is provided with a positioning post, which passes through the first lateral extension of the first mating part.

[0027] This makes it easy to position the sealing strip and the first mating part during installation.

[0028] Furthermore, the fixing part is also provided with a limiting rib, which abuts against the rear side of the lower end of the first longitudinal extension of the first mating part.

[0029] This facilitates the positioning of the sealing strip and the first mating part during installation, avoiding misalignment in the front-to-back direction.

[0030] Furthermore, the first mating part includes a first longitudinal extension extending in the vertical direction and a first transverse extension extending forward from the lower end of the first longitudinal extension, and the fixing part of the sealing strip is fixed to the first transverse extension;

[0031] The upper housing assembly also includes a rigid pressure plate, which is disposed below the fixing part. The pressure plate has an upward-flanged flanged hole. The fixing part also has a through hole. A screw fixing hole is formed at the corresponding position of the first mating part. The flange of the flanged hole passes through the through hole and abuts against the bottom surface of the first lateral extension of the first mating part located around the screw fixing hole.

[0032] Therefore, by setting a rigid pressure plate, the flanged holes on the pressure plate are easy to form and have high strength. This not only provides good protection against overcompression of the sealing strip, but also provides better positioning accuracy. The rigid structure limits the excessive deformation of the soft sealing component and prevents it from deforming and failing.

[0033] Furthermore, the first mating part includes a first longitudinal extension extending in the vertical direction and a first transverse extension extending forward from the lower end of the first longitudinal extension, and the fixing part of the sealing strip is fixed to the first transverse extension;

[0034] The second mating part includes a second longitudinal extension extending in the vertical direction, a second transverse extension extending forward from the upper end of the second longitudinal extension, and a third longitudinal extension extending downward from the front end of the second transverse extension. The first longitudinal extension and the second longitudinal extension are both gradually inclined backward from top to bottom. When the air inlet is in the second state, the bottom surface of the third longitudinal extension abuts against the upper surface of the second extension of the sealing strip.

[0035] Thus, the first lateral extension facilitates the fixing of the sealing strip and the first mating part, and the third extension facilitates the sealing mating with the sealing strip. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the range hood in the open state according to an embodiment of the present utility model;

[0037] Figure 2 This is a cross-sectional side view of the range hood in the open state according to an embodiment of the present utility model;

[0038] Figure 3 for Figure 2 A magnified schematic diagram of part I;

[0039] Figure 4 This is a cross-sectional view (section and cross-section) of the range hood in the open state according to an embodiment of the present invention. Figure 3 Parallel, concealed upper box assembly);

[0040] Figure 5 for Figure 4 A magnified schematic diagram of part II;

[0041] Figure 6 This is a schematic diagram of the range hood in the off state according to an embodiment of the present utility model;

[0042] Figure 7 This is a cross-sectional view of the range hood in the closed state according to an embodiment of the present utility model. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] See Figures 1-7 A range hood includes an upper housing assembly 1, an air inlet 2, and a smoke baffle 3.

[0046] The upper housing assembly 1 includes an outer housing 11 and a fan frame 12 connected to the outer housing 11. The lower end of the fan frame 12 may be partially located inside the outer housing 11, and the fan frame 12 is used to house the fan 6.

[0047] The upper housing assembly 1 can be installed inside the kitchen cabinet. Since the width of the fan frame 12 usually needs to be compatible with the width of the fan 6, the fan frame 12 does not need to be large. However, the air inlet 2 needs to be larger to accommodate a standard household double burner. For these reasons, the upper housing assembly 1 is divided into an outer housing 11 and a fan frame 12. If the optimization of air intake efficiency is not considered, an integrated upper housing assembly 1 can also be used.

[0048] The air inlet 2 is movable relative to the upper housing assembly 1, and an air inlet 21 is formed on its front side. When the air inlet 2 is in the first state, it is at its highest position, and at least part of it, such as the front end, is hidden and housed within the upper housing assembly 1, and is located below the fan. When the air inlet 2 is in the second state, it is at its lowest position and fully open, and at least part of it is below the upper housing assembly 1 and exposed thereout, ensuring that the air inlet 21 is below the bottom of the upper housing assembly 1 and exposed thereout. The "front side" of the air inlet 2 mentioned above refers to the side of the air inlet 2 facing the user when it is in the second state. Alternatively, the air inlet 2 can also be a plate, which, when in the second state, is at least partly located below the upper housing assembly 1, so that fumes can rise around the periphery of the air inlet 2 and enter the interior of the upper housing assembly 1 through the opening at the bottom of the upper housing assembly 1 (which is necessary to accommodate at least part of the air inlet 2).

[0049] The smoke baffle 3 is installed at the bottom of the upper housing assembly 1 (outer housing 11), and can be in an open or closed state, see [reference]. Figure 1 and Figure 2 When the air inlet 2 is in the second state, the smoke baffle 3 is in the open state, and a smoke-collecting cavity Q is formed between the smoke baffle 3 and the front side of the air inlet 2, realizing the downward movement of the air inlet 21 and the increase of the smoke-collecting area, ensuring a better oil fume extraction effect in the working state; see Figure 6 and Figure 7 When the air inlet 2 is in the first state, it is completely housed in the upper housing assembly 1, the smoke baffle 3 is in the closed state, the smoke baffle 3 is closed at the bottom of the outer housing 11, it can be extended horizontally and can be flush with the bottom of the outer housing 11, achieving a completely flat closed state, and at the same time closing the air inlet 21 of the air inlet 2, reducing the overall size of the machine to the minimum.

[0050] The oil cup 4 is located at the bottom rear side of the air inlet 2.

[0051] The range hood also includes a motion mechanism for driving the air intake 2 and the smoke baffle 3, which can move in conjunction or independently. The air intake 2 can perform common lifting and lowering movements, or flipping and swinging movements as described in the background art, as long as the air intake 2 can descend and rise relative to the upper housing assembly 1.

[0052] To reduce the precision requirements for the fit of the air inlet 2 and to avoid leakage caused by high pressure differentials, a sealing strip 5 is also provided in this invention. The upper housing assembly 1 includes a first mating part 13 (upper rear plate) located on the rear side, and the air inlet 2 includes a second mating part 22 (lower rear plate) located on the rear side. The second mating part 22 is located behind the first mating part 13, and the sealing strip 5 can be disposed at the bottom of the first mating part 13. The first mating part 13 includes a first longitudinal extension 131 extending in the vertical direction and a first transverse extension 132 extending forward from the lower end of the first longitudinal extension 131. The second mating part 22 includes a second longitudinal extension 221 extending in the vertical direction, a second transverse extension 132 extending forward from the upper end of the second longitudinal extension 221, and a third longitudinal extension 223 extending downward from the front end of the second transverse extension 222. Each longitudinal extension is not strictly required to extend in the vertical direction and is allowed to have a certain degree of inclination relative to the vertical direction.

[0053] The sealing strip 5 includes a fixing part 51 fixed to a first lateral extension 132 of the first mating part 13, a first extension 52 extending downward from the rear end of the fixing part 51, and a second extension 53 extending rearward from the lower end of the first extension 52. The second extension 53 is configured as a long cantilever. The upper surface of the second extension 53 is provided with an inclined portion 54, which gradually slopes forward from bottom to top. The side of the inclined portion 54 facing the second mating part 22 is a slope, forming a mating surface 541. When the air inlet 2 is in the first state, the upper end of the second mating part 22 is higher than the sealing strip 5. When the air inlet 2 is in the second state, the front surface of the third longitudinal extension 223 of the second mating part 22 can abut against the mating surface 541. The inclined portion 54 is located in front of the rear end of the second extension 53, thereby allowing the bottom surface of the third longitudinal extension 223 to abut against the upper surface of the second extension 53. The aforementioned fixing part 51, first extension part 52, second extension part 53 and inclined part 54 can be integrally formed.

[0054] The long cantilever structure and inclined mating surface 541 can accommodate the lateral and longitudinal movement of the mating air inlet 2. The long cantilever structure ensures that the second mating part 22 can still contact the body and maintain a seal when its vertical position fluctuates, thanks to the rotation of the main body (the rotation axis extends in the left and right direction). The mating surface 541 has a guiding function and provides allowance for the vertical and lateral fluctuations of the second mating part 22.

[0055] The inclined portion 54 and the long cantilever feature together form a cavity structure (located within the first extension portion 52, the second extension portion 53, and the inclined portion 54). When the range hood is working, this area is exposed to the air (i.e., the open space behind the first mating portion 13), so the air pressure is greater than the air pressure below the sealing strip 5, forming a high-pressure zone. Under the action of the pressure difference, the mating surface 541 adheres to the third longitudinal extension portion 223 of the second mating portion 22, achieving a reliable seal, and the sealing performance is strengthened as the pressure difference increases.

[0056] The length of the second extension 53 ( Figure 2 The dimension in the front-to-back direction shown is L, and the distance between the lower end of the inclined portion 54 and the front end of the second extension 53 is a, satisfying a≥0.5L. This allows the inclined portion 54 to be positioned with sufficient rotational deformation of the second extension 53 for better contact with the second mating portion 22. The included angle between the inclined portion 54 and the second extension 53 is α, satisfying 45°≤α≤90°, which better achieves a guiding function. To ensure communication between the high-pressure area and the atmosphere, the gap width between the upper end of the inclined portion 54 and the first extension 52 is w, preferably w≥2mm.

[0057] The fixing part 51 of the sealing strip 5 is provided with a positioning post 511 and a limiting rib 512. The positioning post 511 passes through the first transverse extension 132 of the first mating part 13, and the limiting rib 512 abuts against the rear side of the lower end of the first longitudinal extension 131 of the first mating part 13, thereby achieving positioning with the first mating part 13.

[0058] The upper housing assembly 1 also includes a pressure plate 14 (rigid material), which is disposed below the fixing part 51. The pressure plate 14 has an upwardly flanged hole 141, and the fixing part 51 also has a through hole 513. A screw fixing hole 133 is formed at the corresponding position of the first mating part 13. In the installed state, the flange of the flanged hole 141 passes through the through hole 513 and abuts against the bottom surface of the first lateral extension 132 of the first mating part 13, which is located around the screw fixing hole 133, thereby preventing excessive compression of the sealing strip 5. The flanged hole 141 on the pressure plate 14 is easy to form and has high strength, providing not only good protection against overcompression of the sealing strip 5 but also better positioning accuracy. Thus, the rigid structure limits excessive deformation of the soft sealing element, preventing its deformation and failure.

Claims

1. A range hood, comprising: Upper housing assembly (1), which includes a first mating part (13) located on the rear side; An air inlet (2) includes a second mating part (22) located on the rear side. The air inlet (2) is movable relative to the upper housing assembly (1) to have a first state and a second state. When the air inlet (2) is in the first state, the air inlet (2) is at least partially placed inside the upper housing assembly (1). When the air inlet (2) is in the second state, the air inlet (2) is at least partially lower than the bottom of the upper housing assembly (1) and exposed outside the upper housing assembly. Its features are: The range hood also includes a sealing strip (5), which includes a fixing part (51) fixed to the bottom of the first mating part (13), a first extension part (52) extending downward from the rear end of the fixing part (51), and a second extension part (53) extending rearward from the lower end of the first extension part (52). When the air inlet (2) is in the second state, the upper end of the second mating part (22) is located at the bottom rear side of the first mating part (13) and abuts against the second extension part (53).

2. The range hood according to claim 1, characterized in that: The sealing strip (5) also includes an inclined portion (54) provided on the upper surface of the second extension portion (53). The inclined portion (54) is gradually inclined forward from bottom to top. The side of the inclined portion (54) facing the second mating portion (22) is an inclined mating surface (541). When the air inlet (2) is in the second state, the upper end of the second mating portion (22) abuts against the mating surface (541).

3. The range hood according to claim 2, characterized in that: The first mating part (13) includes a first longitudinal extension (131) extending in the vertical direction and a first transverse extension (132) extending forward from the lower end of the first longitudinal extension (131), and the fixing part (51) of the sealing strip (5) is fixed to the first transverse extension (132). The second mating part (22) includes a second longitudinal extension (221) extending in the vertical direction, a second lateral extension (222) extending forward from the upper end of the second longitudinal extension (221), and a third longitudinal extension (223) extending downward from the front end of the second lateral extension (222). When the air inlet (2) is in the second state, the bottom surface of the third longitudinal extension (223) abuts against the upper surface of the second extension (53) of the sealing strip (5), while the front surface of the third longitudinal extension (223) abuts against the mating surface (541) of the sealing strip (5).

4. The range hood according to claim 2, characterized in that: The length of the second extension (53) is L, the distance between the lower end of the inclined part (54) and the front end of the second extension (53) is a, and a ≥ 0.5L is satisfied.

5. The range hood according to claim 2, characterized in that: The angle between the inclined portion (54) and the second extension portion (53) is α, and satisfies 45°≤α≤90°.

6. The range hood according to claim 2, characterized in that: The gap width between the upper end of the inclined portion (54) and the first extension portion (52) is w, and w≥2mm.

7. The range hood according to claim 1, characterized in that: The first mating part (13) includes a first longitudinal extension (131) extending in the vertical direction and a first transverse extension (132) extending forward from the lower end of the first longitudinal extension (131), and the fixing part (51) of the sealing strip (5) is fixed to the first transverse extension (132). The fixing part (51) is provided with a positioning post (511), which passes through the first lateral extension (132) of the first mating part (13).

8. The range hood according to claim 7, characterized in that: The fixing part (51) is also provided with a limiting rib (512), which abuts against the rear side of the lower end of the first longitudinal extension (131) of the first mating part (13).

9. The range hood according to claim 1, characterized in that: The first mating part (13) includes a first longitudinal extension (131) extending in the vertical direction and a first transverse extension (132) extending forward from the lower end of the first longitudinal extension (131), and the fixing part (51) of the sealing strip (5) is fixed to the first transverse extension (132). The upper housing assembly (1) also includes a rigid pressure plate (14), which is disposed below the fixing part (51). The pressure plate (14) has an upwardly turned flange hole (141), and the fixing part (51) also has a through hole (513). The first mating part (13) has a screw fixing hole (133) at the corresponding position. The flange of the flange hole (141) passes through the through hole (513) and abuts against the bottom surface of the first lateral extension (132) of the first mating part (13) located around the screw fixing hole (133).

10. The range hood according to claim 1, characterized in that: The first mating part (13) includes a first longitudinal extension (131) extending in the vertical direction and a first transverse extension (132) extending forward from the lower end of the first longitudinal extension (131), and the fixing part (51) of the sealing strip (5) is fixed to the first transverse extension (132). The second mating part (22) includes a second longitudinal extension (221) extending in the vertical direction, a second lateral extension (222) extending forward from the upper end of the second longitudinal extension (221), and a third longitudinal extension (223) extending downward from the front end of the second lateral extension (222). The first longitudinal extension (131) and the second longitudinal extension (221) are both inclined backward from top to bottom. When the air inlet (2) is in the second state, the bottom surface of the third longitudinal extension (223) abuts against the upper surface of the second extension (53) of the sealing strip (5).

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