Smoke-proof oil fume extractor

Abstract

The utility model discloses a kind of anti-smoke oil fume exhaust fans, comprising: air inlet body, its front side is formed with smoke inlet;Fixed panel;And smoke baffle assembly, it includes the smoke baffle that can open and close smoke inlet, the smoke baffle has opposite first end and second end, when the smoke baffle is in open state, the first end is located above second end, the first end is opposite with fixed panel and with the outer surface of fixed panel between there is first gap;The smoke baffle assembly further includes the sealing strip corresponding with the first end of smoke baffle, when the smoke baffle is in open state, the sealing strip is abutted with the outer surface of fixed panel and fills first gap.

Description

Technical Field

[0001] This utility model relates to an oil fume purification device, and in particular to an oil fume extraction machine that prevents smoke from escaping. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a fan system installed inside to draw in cooking fumes and filtering out some grease particles with a filter. The fan system is typically a centrifugal fan, consisting of a casing, an impeller housed within the casing, and a motor that drives the impeller. When the impeller rotates, a negative pressure suction is generated at the center of the fan, drawing the cooking fumes from below into the fan. After being accelerated by the fan, the fumes are collected by the casing and guided outwards.

[0003] Side-draft range hoods are widely popular due to their low risk of head bumps and effective smoke extraction. A typical side-draft range hood includes a fixed panel, an air inlet, and a smoke baffle. The smoke baffle is connected to a hinge and a drive motor. When the range hood is started, the drive motor rotates the hinge, opening the smoke baffle to its fixed position. Then, the fan system starts, allowing fumes to enter the range hood through the air inlet and be expelled. The smoke baffle helps to collect and extract smoke during operation, ensuring effective smoke extraction. Examples of such range hoods include those disclosed in Chinese Patent Application No. 202411889433.7, Chinese Patent Application No. 202322823659.4, and Chinese Patent Application No. 202410266009.0.

[0004] Because the smoke baffle needs to be opened and closed, a certain gap is usually left between the upper part of the smoke baffle and the fixed panel in the design. Otherwise, the smoke baffle may collide and interfere with the fixed panel when it is opened or closed, causing malfunctions. When food is put into the pot, especially when wet food comes into contact with hot oil, a large amount of oil fumes are generated and rise instantly. The range hood's suction power is not enough to suck the oil fumes into the range hood instantly. At this time, some oil fumes will overflow from the gap between the smoke baffle and the fixed panel, causing smoke to escape and affecting the user experience. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a smoke-proof range hood that can seal the gap between the smoke baffle and the fixed panel, thereby preventing smoke from escaping.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a smoke-proof and oil-absorbing range hood, comprising:

[0007] The air intake body has a smoke inlet formed on its front side;

[0008] Fixed panel; and

[0009] A smoke baffle assembly includes a smoke baffle capable of opening and closing a smoke inlet, the smoke baffle having opposing first and second ends, wherein when the smoke baffle is in the open state, the first end is positioned above the second end, the first end is opposite to a fixed panel and has a first gap with the outer surface of the fixed panel; characterized in that:

[0010] The smoke baffle assembly also includes a sealing strip corresponding to the first end of the smoke baffle. When the smoke baffle is in the open state, the sealing strip abuts against the outer surface of the fixed panel and fills the first gap.

[0011] By using a sealing strip on the smoke baffle, when the smoke baffle is open, the sealing strip can abut against the outer surface of the fixed panel to fill the first gap between the smoke baffle and the fixed panel, thereby sealing the first gap and preventing smoke from escaping. The sealing strip does not affect the normal opening and closing of the smoke baffle and has minimal impact on the original appearance of the range hood. In addition, when the smoke baffle is closed, the sealing strip helps to reduce the large gap between the smoke baffle and the fixed panel.

[0012] Furthermore, to facilitate the installation of the sealing strip, the smoke baffle assembly also includes a back plate, which is disposed on the side of the smoke baffle facing the air inlet. The back plate has a third end corresponding to the first end of the smoke baffle. A groove is formed on the back plate near the third end, and the groove is formed by the back plate being recessed in a direction away from the smoke baffle. The third end of the back plate extends beyond the first end of the smoke baffle, thereby causing the opening of the groove to be at least partially exposed in the smoke baffle, and the sealing strip is at least partially placed in the groove.

[0013] Furthermore, to facilitate sealing and fixing of the sealing strip to the smoke baffle and back plate, the sealing strip has a first part placed in the groove and a second part exposed in the groove and adjacent to the first end of the smoke baffle. The first part is clamped and fixed by the smoke baffle and back plate.

[0014] Furthermore, the sealing strip also has a third part that engages with the third end of the back plate. The third part has a hook structure, thereby engaging with the side of the third end of the back plate located outside the groove, thereby preventing the sealing strip from deforming and sinking into the groove.

[0015] Furthermore, to prevent users from touching the sealing strip during wiping and cleaning, and to prevent damage to the sealing strip, along the thickness direction of the smoke baffle, the distance between the most protruding position of the second part of the sealing strip relative to the groove and the surface of the smoke baffle away from the back plate is h2, and h2 > 0.

[0016] Furthermore, the second portion has a first corner portion close to the first end of the smoke baffle and a second corner portion away from the first end. A second gap exists between the first corner portion and the first end of the smoke baffle. The second corner portion is used to abut against the fixed panel. The second gap is used to accommodate the volume of the sealing strip deforming towards the first end after the sealing strip is interference-fitted with the fixed panel, preventing the sealing strip from deforming too much and protruding from the smoke baffle, affecting the user's appearance or cleaning touch.

[0017] Furthermore, the second corner is rounded to ensure that it contacts the fixed panel first when the smoke baffle is opened, while also being able to withstand gradually increasing interference forces.

[0018] Furthermore, in the cross-section of the sealing strip, the second corner is an arc, and the sealing strip and the two ends of the second corner are both straight edges, and the included angle between the two straight edges is α, which satisfies 90°≤α≤120°. The cross-section is a section along the thickness direction of the smoke baffle, so that the second corner can better contact the fixed panel first when the smoke baffle is opened, and can withstand the gradually increasing interference force.

[0019] Furthermore, along the thickness direction of the smoke baffle, the vertical distance between the third end of the back plate and the back of the smoke baffle facing the back plate is h1, and h1 > 0, to prevent collision and interference between the smoke baffle positioning fixture and the back plate when the smoke baffle assembly is installed and the smoke baffle is positioned.

[0020] Preferably, the range hood is configured such that it further includes an upper housing connected to an air inlet body. The air inlet body is movable relative to the upper housing and has a first state and a second state. When the air inlet body is in the first state, the smoke baffle is in a closed state, and the air inlet body is at least partially housed in the upper housing. The smoke baffle covers the bottom of the upper housing and closes the smoke inlet. When the air inlet body is in the second state, the smoke baffle is in an open state, and the air inlet body is at least partially exposed in the upper housing. The smoke inlet is lower than the bottom of the upper housing and is exposed in the upper housing.

[0021] The fixed panel is formed at the bottom of the upper housing, and when the smoke baffle is in the closed state, the smoke baffle is located behind the fixed panel, and when the smoke baffle is in the open state, the first end of the smoke baffle is located below the fixed panel.

[0022] Furthermore, the sealing strip has a length of L along the left-right direction of the range hood, and L > 700 mm, so as to cover the range of oil fumes generated by the commonly used dual-burner structure in households.

[0023] Compared with existing technologies, the advantages of this invention are as follows: By using a sealing strip on the smoke baffle, when the smoke baffle is opened, the sealing strip can abut against the outer surface of the fixed panel to fill the first gap between the smoke baffle and the fixed panel, thereby sealing the first gap and preventing smoke escape. The sealing strip does not affect the normal opening and closing of the smoke baffle and has minimal impact on the original appearance of the range hood. Furthermore, when the smoke baffle is closed, the sealing strip helps to reduce the large gap between the smoke baffle and the fixed panel. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the range hood in the open state according to an embodiment of the present utility model;

[0025] 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;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of part I;

[0027] Figure 4 This is a partially enlarged cross-sectional view of the smoke baffle assembly of the range hood according to an embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of the smoke baffle assembly of the range hood according to an embodiment of the present utility model;

[0029] Figure 6 This is a schematic diagram of the range hood in the off state according to an embodiment of the present utility model;

[0030] Figure 7 This is a sectional side view of the range hood in the closed state according to an embodiment of the present invention;

[0031] Figure 8 for Figure 7 A magnified schematic diagram of part II. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] See Figures 1 to 8 A range hood designed to prevent smoke leakage includes an air inlet body 1, an upper housing 2 connected to the air inlet body 1, and a fan 3 disposed within the upper housing 2.

[0035] The air inlet 1 includes a front panel 11 that gradually slopes downwards from front to back, and a smoke inlet 12 is formed on the front panel 11. The upper housing 2 includes a fixed panel 21 located at the bottom, which extends substantially horizontally in the front-rear direction of the range hood. In this embodiment, the air inlet 1 can move relative to the upper housing 2 and has a first state and a second state. In the first state, the air inlet 1 is at least partially hidden and housed within the upper housing 2. In the second state, the air inlet 1 is at least partially exposed within the upper housing 2, and the smoke inlet 12 is ensured to be below the bottom of the upper housing 2 and exposed within the upper housing 2. In a horizontal projection, the upper end of the front panel 11 is located behind the rear end of the fixed panel 21. In the second state, the upper end of the front panel 11 and the rear end of the fixed panel 21 can be flush or have a height difference. The movement of the air inlet 1 is not limited, such as vertical lifting, flipping relative to the upper housing 2, or a combination of flipping and swinging relative to the upper housing 2.

[0036] The range hood also includes a smoke baffle assembly, which includes a smoke baffle 41 and a sealing strip 42. The smoke baffle 41 has a closed state and an open state. See [link / reference] Figure 7 and Figure 8 When in the closed state, the air inlet 1 is in the rising state, and the smoke inlet 12 is located inside the upper housing 2. The smoke baffle 41 covers the bottom of the upper housing 2 and closes the smoke inlet 12. See [link to relevant documentation]. Figure 1 and Figure 2When in the open state, the air inlet 1 is simultaneously in a lowered state, forming a smoke-collecting cavity between the smoke baffle 41 and the front panel 11, and the smoke inlet 12 is opened. The smoke baffle 41 has a first end 411 and a second end 412 facing each other. When in the closed state, the first end 411 is located in front of the second end 412 and is in a basically horizontal state, located entirely behind the fixed panel 21. When in the open state, the first end 411 is located above the second end 412. In the horizontal projection, the second end 412 may be located in front of the first end 411, and at this time, the first end 411 moves forward relative to the closed state and faces the fixed panel 21 (in this embodiment, it is located below the fixed panel 21). There is a first gap 211 between the first end 411 and the outer surface (the surface facing the user, the lower surface in this embodiment) of the fixed panel 21. A sealing strip 42 is provided at the first end 411 of the smoke baffle 41. For details on the movement of the air inlet 1 and the smoke baffle 41, please refer to the applicant's patent mentioned in the background art.

[0037] The smoke baffle assembly also includes a back plate 43, which is disposed on the side of the smoke baffle 41 facing the air inlet 1. The smoke baffle 41 is typically a glass panel, while the back plate 43 is typically a sheet metal part, glued to the smoke baffle 41 to reinforce it and prevent the glass from bending or deforming. The back plate 43 may partially protrude relative to the smoke baffle 41 in a direction away from the smoke baffle 41 (facing the air inlet 1 when closed), thereby forming a space between the back plate 43 and the smoke baffle 41 for accommodating the switch assembly 44.

[0038] The back plate 43 has a third end 432 corresponding to the first end 411 of the smoke baffle 41. A groove 431 is formed near the third end 432 in the back plate 43, recessed away from the smoke baffle 41. The third end 432 of the back plate 43 extends beyond the first end 411 of the smoke baffle 41, thereby exposing at least part of the opening of the groove 431 to the smoke baffle 41. A sealing strip 42 is disposed at a position corresponding to the first end 411 of the smoke baffle 41. The sealing strip 42 has an integrally formed structure, having a first portion 421 placed within the groove 431, a second portion 422 protruding from the groove 431 and adjacent to the first end 411 of the smoke baffle 41, and a third portion 423 engaging with the third end 432 of the back plate 43. The first portion 411 can be partially clamped and fixed within the groove 431 by the smoke baffle 41 and the back plate 43. The third part 423 has a hook structure and engages with the third end 432 of the back plate 43 on the side outside the groove 431, thereby preventing the sealing strip 42 from deforming and concave. When the smoke baffle 41 is in the closed state, the second part 422 is located in front of the first end 411. When the smoke baffle 41 is in the open state, the second part 422 is located above the first end 411.

[0039] During installation, first install the sealing strip 42 onto the back plate 43, then press the smoke baffle 41 against the back plate 43 and secure it with adhesive. This also prevents the sealing strip 42 from concave during the pressing of the smoke baffle 41 against the back plate 43. Along the thickness direction of the smoke baffle 41 (this direction is as follows...) Figure 3 (in the X direction shown), the vertical distance between the third end 432 of the back plate 43 and the back of the smoke baffle 41 facing the back of the back plate 43 is h1, and h1 > 0 is satisfied to prevent the smoke baffle positioning fixture from colliding and interfering with the back plate 43 when positioning the smoke baffle 41. The second part 422 of the sealing strip 42 does not extend beyond the surface of the smoke baffle 41 away from the back plate 43. That is, along the thickness direction of the smoke baffle 41, the distance between the most protruding position of the second part 422 of the sealing strip 42 relative to the groove 431 (this position is the minimum distance between the entire sealing strip 42 and the surface of the smoke baffle 41 away from the back plate 43) and the surface of the smoke baffle 41 away from the back plate 43 is h2, and h2 > 0. Specifically, when in the closed state, the distance between the lowest point of the second part 422 and the lower surface of the smoke baffle 41 (which is also equivalent to the distance between the front end of the second part 422 and the front surface of the smoke baffle 41 when in the open state) is h2, to prevent the user from touching the sealing strip 42 when wiping and cleaning, and to prevent the sealing strip 42 from being damaged.

[0040] The second part 422 has a first corner 4221 close to the first end 411 of the smoke baffle 41 and a second corner 4222 away from the first end 411. A second gap 424 exists between the first corner 4221 and the first end 411 of the smoke baffle 41 to accommodate the volume of the sealing strip 42 deforming towards the first end 411 after the sealing strip 42 is interference-fitted with the fixed panel 21, preventing excessive deformation of the sealing strip 42 and its protrusion from the smoke baffle 41, thus affecting the user's appearance or cleaning. When the smoke baffle 41 is opened close to its final position, the second corner 4222 of the second part 422, away from the first end 411 of the smoke baffle 41, must first contact the fixed panel 21, and the interference force on the sealing strip 42 increases with the opening angle of the smoke baffle 41. Therefore, the second corner 4222 is a rounded corner, that is, on the cross section (the cross section along the X direction) of the sealing strip 42, the second corner 4222 is an arc. The sealing strip 42 and the two ends of the second corner 4222 are connected by straight edges 425, and the included angle between the two straight edges 425 is α, which satisfies 90°≤α≤120°.

[0041] The sealing strip 42 has a length of L along the left and right direction of the range hood, and L > 700 mm, so as to cover the range of oil fumes generated by the commonly used dual-burner structure in households.

[0042] By using a sealing strip 42 on the smoke baffle 41, when the smoke baffle 41 is open, the sealing strip 42 can abut against the outer surface of the fixed panel 21 to fill the first gap 211 between the smoke baffle 41 and the fixed panel 21, thereby sealing the first gap 211 and preventing smoke from escaping. The sealing strip 42 does not affect the normal opening and closing of the smoke baffle 41 and has little impact on the original appearance of the range hood. In addition, when the smoke baffle 41 is closed, the sealing strip 42 helps to reduce the large gap between the smoke baffle 41 and the fixed panel 21.

[0043] In the above embodiment, the range hood is a height-adjustable model, with the fixed panel 21 formed at the bottom of the upper housing 2. Alternatively, the smoke baffle assembly of this utility model can also be used in conventional fixed side-suction range hoods, such as the range hood disclosed in Chinese Patent Application No. 202411889433.7 mentioned in the background art. That is, the smoke inlet 12 is provided on the air inlet 1, the fixed panel 21 is located above the smoke inlet 21, the smoke baffle 41 is flush with the fixed panel 21 when closed, and when the smoke baffle 41 is open, its first end 411 is opposite to the fixed panel 21, meaning it is located on the front side of the fixed panel 21 (moving forward and upward when open, thus higher than the lower end of the fixed panel 21).

Claims

1. A range hood designed to prevent smoke leakage and extract cooking oil, comprising: An air inlet (1) has a smoke inlet (12) formed on its front side; Fixed panel (21); as well as A smoke baffle assembly comprising a smoke baffle (41) capable of opening and closing a smoke inlet (12), the smoke baffle (41) having opposing first end (411) and second end (412), wherein when the smoke baffle (41) is in the open state, the first end (411) is located above the second end (412), the first end (411) is opposite to a fixed panel (21) and has a first gap (211) between it and the outer surface of the fixed panel (21); characterized in that: The smoke baffle assembly also includes a sealing strip (42) corresponding to the first end (411) of the smoke baffle (41). When the smoke baffle (41) is in the open state, the sealing strip (42) abuts against the outer surface of the fixed panel (21) and fills the first gap (211).

2. The smoke-proof range hood according to claim 1, characterized in that: The smoke baffle assembly also includes a back plate (43) disposed on the side of the smoke baffle (41) facing the air inlet (1). The back plate (43) has a third end (432) corresponding to the first end (411) of the smoke baffle (41). The back plate (43) has a groove (431) formed near the third end (432). The groove (431) is formed by the back plate (43) being recessed away from the smoke baffle (41). The third end (432) of the back plate (43) extends beyond the first end (411) of the smoke baffle (41), thereby making the opening of the groove (431) at least partially exposed outside the smoke baffle (41). The sealing strip (42) is at least partially placed in the groove (431).

3. The smoke-proof range hood according to claim 2, characterized in that: The sealing strip (42) has a first portion (421) placed in a groove (431) and a second portion (422) exposed in the groove (431) and adjacent to the first end (411) of the smoke baffle (41), the first portion (421) being held and fixed by the smoke baffle (41) and the back plate (43).

4. The smoke-proof range hood according to claim 2, characterized in that: The sealing strip (42) also has a third part (423) that engages with the third end (432) of the back plate (43), the third part (423) having a hook structure, thereby engaging with the side of the third end (432) of the back plate (43) located outside the groove (431).

5. The smoke-proof range hood according to claim 3, characterized in that: Along the thickness direction of the smoke baffle (41), the distance between the most protruding position of the second part (422) of the sealing strip (42) relative to the groove (431) and the surface of the smoke baffle (41) away from the back plate (43) is h2, and h2 > 0.

6. The smoke-proof range hood according to claim 3, characterized in that: The second part (422) has a first corner (4221) close to the first end (411) of the smoke baffle (41) and a second corner (4222) away from the first end (411), a second gap (424) between the first corner (4221) and the first end (411) of the smoke baffle (41), and the second corner (4222) is used to abut against the fixed panel (21).

7. The smoke-proof range hood according to claim 6, characterized in that: The second corner (4222) is rounded.

8. The smoke-proof range hood according to claim 7, characterized in that: On the cross-section of the sealing strip (42), the second corner (4222) is an arc. The sealing strip (42) and the two ends of the second corner (4222) are connected by straight sides (425), and the included angle between the two straight sides (425) is α, which satisfies 90°≤α≤120°. The cross-section is a section along the thickness direction of the smoke baffle (41).

9. The smoke-proof range hood according to claim 2, characterized in that: Along the thickness direction of the smoke baffle (41), the vertical distance between the third end (432) of the back plate (43) and the back of the smoke baffle (41) facing the back of the back plate (43) is h1, and h1 > 0.

10. The smoke-proof range hood according to any one of claims 1 to 9, characterized in that: The range hood also includes an upper housing (2) connected to the air inlet (1). The air inlet (1) can move relative to the upper housing (2) and has a first state and a second state. When the air inlet (1) is in the first state, the smoke baffle (41) is in the closed state, the air inlet (1) is at least partially housed in the upper housing (2), and the smoke baffle (41) covers the bottom of the upper housing (2) and closes the smoke inlet (12). When the air inlet (1) is in the second state, the smoke baffle (41) is in the open state, the air inlet (1) is at least partially exposed in the upper housing (2), and the smoke inlet (12) is lower than the bottom of the upper housing (2) and exposed in the upper housing (2). The fixed panel (21) is formed at the bottom of the upper housing (2), and when the smoke baffle (41) is in the closed state, the smoke baffle (41) is located behind the fixed panel (21), and when the smoke baffle (41) is in the open state, the first end (411) of the smoke baffle (41) is located below the fixed panel (21).

11. The smoke-proof range hood according to any one of claims 1 to 9, characterized in that: The sealing strip (42) has a length of L along the left and right direction of the range hood, and L > 700 mm.

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