Smoke collecting device and range hood

Abstract

The invention discloses a smoke collecting device which comprises a smoke collecting cavity, the lower portion of a front plate of the smoke collecting cavity is rotationally connected with a smoke inlet cavity, and the smoke inlet cavity rotates so that the smoke inlet cavity can be in a closed state in which the smoke inlet cavity can be folded on the front plate of the smoke collecting cavity and in an open state in which the smoke inlet cavity stretches out towards the front side of the smoke collecting cavity; the thickness of the smoke inlet cavity is gradually reduced from the rotating connecting end to the non-rotating connecting end, a first smoke inlet is formed in the inner edge, close to the rotating connecting end, of the inner surface of the smoke inlet cavity, second smoke inlets are formed in the two side edges of the inner surface of the smoke inlet cavity, and a third smoke inlet is formed in the position, close to the non-rotating connecting end, of the inner surface of the smoke inlet cavity. The invention further discloses the range hood. The range hood has the beneficial effect that the range hood has good oil smoke suction performance.

Description

Technical Field

[0001] The present invention relates to a smoke collecting device and a range hood, belonging to the technical field of kitchen appliances. Background Art

[0002] A thin smoke machine is a modern kitchen appliance, mainly used for sucking and exhausting the oil fume and peculiar smell generated during the cooking process. Compared with traditional smoke machines, the ultra-thin smoke machine is favored for its thin design and high efficiency. Especially for the smoke collecting device of the ultra-thin smoke machine, it has a relatively thin thickness and a simple structure, saving space and being suitable for small kitchens or open kitchens.

[0003] In the prior art, the smoke collecting device of the ultra-thin smoke machine is limited by its simple structure, resulting in certain limitations in its smoking performance. Especially when the amount of oil fume is large, the situation of oil fume escaping easily occurs. Summary of the Invention

[0004] The purpose of the present invention is to provide a smoke collecting device and a range hood with good oil fume suction performance.

[0005] The present invention is realized through the following technical solutions.

[0006] A smoke collecting device includes a smoke collecting cavity. The lower part of the front plate of the smoke collecting cavity is rotatably connected with a smoke inlet cavity. The rotation of the smoke inlet cavity enables it to have a closed state of being folded on the front plate of the smoke collecting cavity and an open state of extending forward from the front side of the smoke collecting cavity.

[0007] The thickness of the smoke inlet cavity gradually decreases from the rotation connection end to the non-rotation connection end. The smoke inlet cavity is provided with a first smoke inlet on the inner edge near the rotation connection end of its inner surface, second smoke inlets on both sides of its inner surface, and a third smoke inlet at the part of its inner surface near the non-rotation connection end.

[0008] As a further improvement of the present invention, the inner surface of the smoke inlet cavity is provided with an opening. The inner surface of the smoke inlet cavity has a negative pressure plate that gradually extends into the smoke inlet cavity from the outer edge near the non-rotation connection end. The gap between the inner edge of the opening and the corresponding edge of the negative pressure plate forms the first smoke inlet. The gap between the side edge of the opening and the corresponding edge of the negative pressure plate forms the second smoke inlet. The third smoke inlet is arranged at the part of the negative pressure plate near the outer edge.

[0009] As a further improvement of the present invention, when the smoke inlet cavity is in the open state, the negative pressure plate is inclined downward from front to back, so that the oil fume in the smoke inlet cavity flows into the smoke collecting cavity along the top surface of the negative pressure plate.

[0010] As a further improvement of the present invention, the front panel of the smoke collecting chamber has a cavity opening corresponding to the smoke inlet chamber, the front panel is movably connected to a cover panel that blocks the cavity opening, and can be pushed into the smoke collecting chamber by the smoke inlet chamber during the rotation of the smoke inlet chamber to a closed state, and the cover panel is provided with an elastic reset member for applying elastic force to the cover panel to reset it when it is not pushed by the smoke inlet chamber.

[0011] As a further improvement of the present invention, when the smoke inlet chamber is in an open state, the cover panel is tilted forward from bottom to top, forming an oil smoke deceleration wall for increasing the rising resistance of the oil smoke and guiding the oil smoke to the first smoke inlet, the second smoke inlet and the third smoke inlet.

[0012] As a further improvement of the present invention, the bottom edge of the cover panel is rotatably connected to the bottom edge of the corresponding cavity opening of the front panel, so that the cover panel is turned into the smoke collecting cavity when pushed by the smoke inlet cavity.

[0013] As a further improvement of the present invention, the cover panel and the front panel are rotatably connected via at least one rotating assembly; the rotating assembly comprises a rotating shaft, a first connecting plate connected to the cover panel, and a second connecting plate connected to the front plate, the first connecting plate and the second connecting plate each having at least one sleeve structure sleeved on the rotating shaft; the elastic return member is sleeved on the rotating shaft and its two ends act on the first connecting plate and the second connecting plate respectively.

[0014] As a further improvement of the present invention, a lower panel is fixed to the outer surface of the front panel, and the lower panel extends upward from the bottom edge of the front panel and crosses the bottom edge of the cavity opening, so that when the cover panel is not in contact with the smoke inlet cavity, the elastic force applied by the elastic reset member to the cover panel causes the edge of the cover panel to be pressed against the back side of the lower panel.

[0015] As a further improvement of the present invention, an upper panel is fixed to the outer surface of the smoke inlet chamber, and when the smoke inlet chamber is in a closed state, the bottom edge of the upper panel and the top edge of the lower panel are in contact with each other.

[0016] A range hood comprises the smoke collecting device and a fan device, wherein the fan device is connected to the top of the smoke collecting device.

[0017] Beneficial effects of the present invention:

[0018] The smoke inlet cavity with a tapered design can reduce the encroachment on the kitchen space, especially suitable for small-sized apartments or the installation scenarios of wall cabinets, and meets the structural requirements of ultra-thin range hoods. The thickness of the smoke inlet cavity gradually decreases from the rotation connection end to the non-rotation connection end, forming a tapered channel. According to the Bernoulli effect, the velocity of the air flow increases when passing through the narrowed channel, enhancing the local negative pressure, thereby improving the instantaneous suction force, especially quickly inhaling at the initial stage when the oil fumes are concentrated.

[0019] The first smoke inlet is close to the rotation connection end, that is, located at the thicker part of the smoke inlet cavity, directly aiming at the core rising area of the oil fumes. Utilizing the cross-sectional area advantage of the thicker cavity, it quickly absorbs high-intensity oil fumes (such as the thick smoke in an instant of stir-frying), avoiding "main smoke escape". In addition, the first smoke inlet always covers the area with the densest oil fumes at different rotation angles of the smoke inlet cavity, adapting to different pot heights and stove layouts. The second smoke inlets are distributed on both sides of the smoke inlet cavity, close to the lateral edges of the main oil fume diffusion path, forming a sandwich for the oil fumes escaping to both sides during stir-frying and tossing the pot. It is especially suitable for the wide-pot and large-range operation of Chinese cooking, forming a "T"-shaped negative pressure area with the first smoke inlet to inhibit the oil fumes from bypassing the edge of the smoke inlet cavity and escaping to the top or rear. The third smoke inlet is close to the non-rotation connection end, that is, located at the thinner part of the smoke inlet cavity, which can capture the high-position diffused oil fumes. In the later stage of the oil fumes rising, due to the temperature drop or air flow disturbance, the oil fumes may disperse horizontally. The third smoke inlet can cover the high-position escape area that is difficult to reach in the traditional design. The non-rotation connection end of the tapered smoke inlet cavity may cause too fast local flow velocity and weakened negative pressure due to the reduced thickness. The third smoke inlet increases the suction force in this area by directly opening holes to balance the overall negative pressure distribution.

[0020] In summary, through the spatial hierarchical layout and the collaborative design of aerodynamics, the first smoke inlet, the second smoke inlets, and the third smoke inlet achieve a full-dimensional coverage from the core to the edge and from the low layer to the high layer. Description of the Drawings

[0021] The following will describe in detail the preferred embodiments of the present invention through the drawings to help understand the purpose and advantages of the present invention, where:

[0022] Figure 1 It is a schematic diagram of the smoke collection device in the closed state;

[0023] Figure 2 It is a schematic diagram of the smoke collection device in the opened state;

[0024] Figure 3 It is a schematic diagram of the oil fume suction of the smoke collection device;

[0025] Figure 4 It is a schematic cross-sectional view of the smoke collection device with respect to the covering panel;

[0026] Figure 5 It is a schematic diagram of the oil droplet flow of the smoke collection device;

[0027] Figure 6 It is a schematic structural diagram of an oil fume machine. Specific implementation manners

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined with respect to the structures shown in the respective drawings. The terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. They are relative concepts and may therefore change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0030] Embodiment 1:

[0031] A smoke collecting device, referring to Figures 1-5 , includes a smoke collecting cavity 1. The lower part of the front plate 11 of the smoke collecting cavity 1 is rotatably connected with a smoke inlet cavity 2. The smoke inlet cavity 2 and the smoke collecting cavity 1 are in gas path communication, so that the oil fume generated during cooking is inhaled by the smoke inlet cavity 2 and then flows into the smoke collecting cavity 1. The rotation of the smoke inlet cavity 2 enables it to have a closed state in which it is folded on the front plate 11 of the smoke collecting cavity 1 and an open state in which it extends forward of the smoke collecting cavity 1. When the smoke inlet cavity 2 is in the closed state, it is folded on the front plate 11 of the smoke collecting cavity 1, making the smoke collecting device present an upright flat structure as a whole, belonging to a typical ultra-thin range hood in terms of structural form.

[0032] The thickness of the smoke inlet cavity 2 gradually decreases from the rotation connection end to the non-rotation connection end. The smoke inlet cavity 2 is provided with a first smoke inlet a1 on the inner edge of its inner surface near the rotation connection end, second smoke inlets a2 on both sides of its inner surface, and a third smoke inlet a3 at a position on its inner surface near the non-rotation connection end.

[0033] For the smoke collecting device of this embodiment, the smoke inlet cavity 2 with a gradually thinning design can reduce the occupation of the kitchen space, especially suitable for small-sized apartments or the installation scenario of wall cabinets, and meets the structural requirements of an ultra-thin range hood. The thickness of the smoke inlet cavity 2 gradually decreases from the rotation connection end to the non-rotation connection end, forming a gradually shrinking channel. According to the Bernoulli effect, the air flow speed increases when passing through the narrowed channel, enhancing the local negative pressure, thereby improving the instantaneous suction force, especially quickly inhaling at the initial stage when the oil fume is concentrated.

[0034] The first smoke inlet a1 is close to the rotation connection end, that is, located at the thicker part of the smoke inlet cavity 2, directly aiming at the core rising area of the oil fume. By taking advantage of the cross-sectional area advantage of the thicker cavity, it can quickly absorb high-intensity oil fume, such as the thick smoke during instant stir-frying, to avoid "main smoke escape". In addition, the first smoke inlet a1 always covers the area with the densest oil fume at different rotation angles of the smoke inlet cavity 2, adapting to different pot heights and stove layouts. The second smoke inlets a2 are distributed on both sides of the smoke inlet cavity 2, close to the lateral edges of the main oil fume diffusion path, forming a sandwich for the oil fume escaping to both sides during frying and tossing. It is especially suitable for the wide-pot and large-range operation of Chinese cooking, and forms a "T"-shaped negative pressure area with the first smoke inlet a1 to inhibit the oil fume from escaping around the edge of the smoke inlet cavity 2 to the top or rear. The third smoke inlet a3 is close to the non-rotation connection end, that is, located at the thinner part of the smoke inlet cavity 2, which can capture the high-position diffused oil fume. In the later stage of the oil fume rising, due to the temperature drop or air flow disturbance, the oil fume may disperse horizontally. The third smoke inlet a3 can cover the high-position escape area that is difficult to reach in the traditional design. The gradually thinning non-rotation connection end of the smoke inlet cavity 2 may cause too fast local flow rate and weakened negative pressure due to the reduced thickness. The third smoke inlet a3 increases the suction force in this area by directly opening holes to balance the overall negative pressure distribution.

[0035] In summary, through the spatial hierarchical layout and the collaborative design of aerodynamics, the first smoke inlet a1, the second smoke inlet a2, and the third smoke inlet a3 achieve full-dimensional coverage from the core to the edge and from the lower layer to the high position.

[0036] In this embodiment, openings are provided on the inner surface of the smoke inlet cavity 2. The inner surface of the smoke inlet cavity 2 has a negative pressure plate 21 formed by gradually extending inward from the outer edge close to the non-rotation connection end. The gap between the inner edge of the opening and the corresponding edge of the negative pressure plate 21 forms the first smoke inlet a1, and the gap between the side edge of the opening and the corresponding edge of the negative pressure plate 21 forms the second smoke inlet a2. The third smoke inlet a3 is provided at the part of the negative pressure plate 21 close to the outer edge. Through the setting of the negative pressure plate 21 and the opening, the gap between the edge of the negative pressure plate 21 and the corresponding side edge of the opening forms the first smoke inlet a1 and the second smoke inlet a2. On the one hand, it can simplify the structural setting of the smoke inlet cavity 2. On the other hand, it can make the first smoke inlet a1 and the second smoke inlet a2 form a continuous smoke inlet extending along the bottom edge of the smoke inlet cavity 2, thereby further improving the smoke absorption effect of the smoke inlet cavity 2.

[0037] In this embodiment, when the smoke inlet cavity 2 is in the open state, the negative pressure plate 21 is inclined downward from front to back, so that the oil fume in the smoke inlet cavity 2 flows into the smoke collecting cavity 1 along the top surface of the negative pressure plate 21, which can effectively prevent the oil fume from dripping on the front plate 11 of the smoke collecting device, thereby avoiding the formation of dirt on the front plate 11. An oil box 14 is provided at the bottom of the smoke collecting cavity 1, and the oil droplets flowing from the negative pressure plate 21 into the smoke collecting cavity 1 can be collected by the oil box 14.

[0038] In this embodiment, the front plate 11 of the smoke collecting cavity 1 has an orifice corresponding to the smoke inlet cavity 2. This orifice can be a hollow structure, a sunken platform structure, or other structures that can form an opening. The smoke inlet cavity 2 gradually converges towards the middle from top to bottom, that is, the smoke inlet cavity 2 presents a trapezoidal structure. Correspondingly, the orifice of the front plate 11 also presents a trapezoidal structure. The smoke collecting cavity 1 is movably connected with a cover panel 12 that blocks the orifice, and can be pushed into the smoke collecting cavity 1 by the smoke inlet cavity 2 during the rotation of the smoke inlet cavity 2 towards the closed state. The cover panel 12 is provided with an elastic resetting member 35 for applying an elastic force to the cover panel 12 to reset it when it is not pushed by the smoke inlet cavity 2. On the one hand, through the setting of the cover panel 12 movably connected to the smoke collecting cavity 1, and it can be pushed into the smoke collecting cavity 1 by the smoke inlet cavity 2 during the rotation of the smoke inlet cavity 2 towards the closed state, it is avoided that the smoke inlet cavity 2 interferes with the front plate 11 of the smoke collecting cavity 1 when the smoke inlet cavity 2 is in the closed state, and the front-back width of the smoke collecting device can be made smaller, that is, the smoke collecting device can be made more ultra-thin. On the other hand, since the cover panel 12 can be pushed into the smoke collecting cavity 1 by the smoke inlet cavity 2, the thickness limit of the smoke inlet cavity 2 is lower, especially at the non-rotating connection end, to increase the oil fume flow rate of the smoke inlet cavity 2.

[0039] In this embodiment, when the smoke inlet cavity 2 is in the open state, the cover panel 12 is inclined forward from bottom to top. During the upward floating of the oil fume, it will contact the cover panel 12 and slow down the speed of continuing to float upward, and is sucked in under the negative pressure of the first smoke inlet a1, the second smoke inlet a2, and the third smoke inlet a3. Therefore, the cover panel 12 forms a smoke deceleration wall for increasing the resistance of the oil fume rising and guiding the oil fume to the first smoke inlet a1, the second smoke inlet a2, and the third smoke inlet a3, improving the performance of preventing the oil fume from escaping.

[0040] In this embodiment, the bottom edge of the cover panel 12 is rotatably connected to the bottom edge of the corresponding orifice of the front plate 11, so that when the cover panel 12 is pushed by the smoke inlet cavity 2, the cover panel 12 rotates towards the inside of the smoke collecting cavity 1 with its bottom edge as the rotation axis. When the smoke inlet cavity 2 is in the closed state, the cover panel 12 is located inside the smoke collecting cavity 1, and the cover panel 12 is inclined backward from the bottom edge to the top edge. It should be noted that when the smoke inlet cavity 2 is in the open state, the oil fume will contact the cover panel 12 and form oil droplets on the cover panel 12. When the user finishes cooking and the smoke inlet cavity 2 rotates to the closed state, since the cover panel 12 is pushed into the smoke collecting cavity 1 and is inclined, the oil droplets on the cover panel 12 will flow down along the front side of the cover panel 12 and drip into the smoke collecting cavity 1, thereby reducing the oil stains formed on the cover panel 12.

[0041] In this embodiment, the cover panel 12 and the front panel 11 are rotatably connected by at least one rotating assembly, and the number of rotating assemblies needs to be reasonably set according to the actual width of the cover panel 12. The rotating assembly includes a rotating shaft 33, a first connecting piece 31 connected to the cover panel 12, and a second connecting piece 32 connected to the front panel 11. The first connecting piece 31 and the second connecting piece 32 each have at least one sleeve structure 34 sleeved on the rotating shaft 33. The elastic reset member 35 is configured as a torsion spring, which is sleeved on the rotating shaft 33 and its two ends act on the first connecting piece 31 and the second connecting piece 32 respectively. By combining the elastic reset member 35 with the rotating structure, the structure is simplified and occupies less space.

[0042] In this embodiment, a lower panel 13 is fixed to the outer surface of the front panel 11, and the lower panel 13 extends upward from the bottom edge of the front panel 11 and crosses the bottom edge of the cavity opening, so that when the cover panel 12 does not contact the smoke inlet chamber 2, the elastic force applied by the elastic reset member 35 to the cover panel 12 causes the edge of the cover panel 12 to be pressed against the back of the lower panel 13, thereby avoiding the formation of a gap between the cover panel 12 and the edge of the cavity opening.

[0043] In this embodiment, an upper panel 22 is fixed to the outer surface of the smoke inlet chamber 2, and the bottom edge of the upper panel 22 and the top edge of the lower panel 13 are in contact with each other when the smoke inlet chamber 2 is closed, so that the front of the smoke collecting chamber 1 presents a flat structure when the smoke inlet chamber 2 is closed. The upper panel 22 and the lower panel 13 can be specifically set as glass panels.

[0044] Implementation Case 2:

[0045] A range hood, referring to Figure 6 , including a smoke collecting device and a fan device 4, wherein the smoke collecting device is as shown in implementation case 1, the fan device 4 is connected to the top of the smoke collecting device, and a fan is arranged in the fan device 4. When the fan is started, a negative pressure is formed at the smoke inlet corresponding to the smoke collecting device, thereby sucking the oil smoke into the smoke collecting chamber 1, and then entering the fan device 4, and finally discharged from the smoke exhaust pipe (not shown in the figure).

[0046] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation cases, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A smoke collecting device, characterized in that: The smoke collecting chamber (1) comprises a smoke collecting chamber (1), wherein the lower part of the front plate (11) of the smoke collecting chamber (1) is rotatably connected to a smoke inlet chamber (2), and the rotation of the smoke inlet chamber (2) enables the smoke inlet chamber (2) to have a closed state in which it is folded onto the front plate (11) of the smoke collecting chamber (1) and an open state in which it is extended toward the front side of the smoke collecting chamber (1); The thickness of the smoke inlet chamber (2) gradually decreases from the rotating connection end to the non-rotating connection end. The smoke inlet chamber (2) is provided with a first smoke inlet port (a1) on the inner edge of its inner surface close to the rotating connection end, a second smoke inlet port (a2) on two side edges of its inner surface, and a third smoke inlet port (a3) ​​on the inner surface close to the non-rotating connection end.

2. The smoke collecting device according to claim 1, characterized in that: The inner surface of the smoke inlet chamber (2) is provided with an opening, and the inner surface of the smoke inlet chamber (2) is formed by an outer edge close to the non-rotating connection end and having a negative pressure plate (21) gradually extending into the smoke inlet chamber (2), the gap between the inner edge of the opening and the corresponding edge of the negative pressure plate (21) forms the first smoke inlet port (a1), the gap between the side edge of the opening and the corresponding edge of the negative pressure plate (21) forms the second smoke inlet port (a2), and the third smoke inlet port (a3) ​​is arranged at a portion of the negative pressure plate (21) close to the outer edge.

3. The smoke collecting device according to claim 2, characterized in that: When the smoke inlet chamber (2) is in an open state, the negative pressure plate (21) is arranged to tilt downward from front to back, so that the oil smoke in the smoke inlet chamber (2) flows into the smoke collecting chamber (1) along the top surface of the negative pressure plate (21).

4. The smoke collecting device according to claim 1, characterized in that: The front plate (11) of the smoke collecting chamber (1) has a cavity opening corresponding to the smoke inlet chamber (2); the front plate (11) is movably connected to a cover plate (12) that blocks the cavity opening, and can be pushed into the smoke collecting chamber (1) by the smoke inlet chamber (2) when the smoke inlet chamber (2) is rotated toward a closed state; the cover plate (12) is provided with an elastic reset member (35) for applying elastic force to the cover plate (12) to reset it when it is not pushed by the smoke inlet chamber (2).

5. The smoke collecting device according to claim 4, characterized in that: When the smoke inlet chamber (2) is in an open state, the cover panel (12) is arranged to tilt forward from bottom to top, forming an oil smoke deceleration wall for increasing the rising resistance of oil smoke and guiding the oil smoke to the first smoke inlet port (a1), the second smoke inlet port (a2) and the third smoke inlet port (a3).

6. The smoke collecting device according to claim 4, characterized in that: The bottom edge of the cover panel (12) is rotatably connected to the bottom edge of the corresponding cavity opening of the front panel (11), so that the cover panel (12) is turned into the smoke collecting cavity (1) when pushed by the smoke inlet cavity (2).

7. The smoke collecting device according to claim 6, characterized in that: The cover panel (12) and the front panel (11) are rotatably connected via at least one rotating assembly; the rotating assembly comprises a rotating shaft (33), a first connecting piece (31) connected to the cover panel (12), and a second connecting piece (32) connected to the front panel (11); the first connecting piece (31) and the second connecting piece (32) each have at least one sleeve structure (34) sleeved on the rotating shaft (33); the elastic return member (35) is sleeved on the rotating shaft (33) and its two ends act on the first connecting piece (31) and the second connecting piece (32) respectively.

8. The smoke collecting device according to claim 6, characterized in that: A lower panel (13) is fixed to the outer surface of the front panel (11), and the lower panel (13) extends upward from the bottom edge of the front panel (11) and crosses the bottom edge of the cavity opening, so that when the cover panel (12) is not in contact with the smoke inlet cavity (2), the elastic force applied by the elastic return member (35) to the cover panel (12) causes the edge of the cover panel (12) to be pressed against the back side of the lower panel (13).

9. The smoke collecting device according to claim 8, characterized in that: An upper panel (22) is fixed to the outer surface of the smoke inlet chamber (2), and when the smoke inlet chamber (2) is in a closed state, the bottom edge of the upper panel (22) and the top edge of the lower panel (13) are in contact with each other.

10. A range hood, characterized in that: It comprises the smoke collecting device according to any one of claims 1 to 9 and a fan device (4), wherein the fan device (4) is connected to the top of the smoke collecting device.

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