A smoke collecting device and a range hood

Abstract

The present invention discloses a smoke collecting device, which includes a smoke collecting cavity, a first smoking cavity, a second smoking cavity, and an oil box located at the bottom inside the smoke collecting cavity; the rotation range of the first smoking cavity is limited between its closed state where it is retracted into the smoke collecting cavity and its open state where it extends forward of the smoke collecting cavity. An oil guiding hole is provided at the bottom of the first smoking cavity, and a second concealed air intake is provided at the top of the second smoking cavity; when the first smoking cavity is in the closed state, the oil droplets in the first smoking cavity flow to the oil guiding hole at the bottom of the first smoking cavity in sequence, flow into the second smoking cavity through the second concealed air intake, flow into the smoke collecting cavity and finally flow to the oil box; when the first smoking cavity is in the open state, the oil droplets in the first smoking cavity flow to the top of the first smoking cavity in sequence, flow into the smoke collecting cavity and finally flow to the oil box. The present invention also discloses a range hood. The beneficial effect of the present invention is that it can avoid the formation of oil scale due to internal condensation.

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] The ultra-thin range hood is a modern kitchen appliance mainly used for sucking and exhausting the oil fumes and odors generated during the cooking process. Compared with the traditional range hood, the ultra-thin range hood is favored for its thin design and high efficiency, especially the smoke collecting device of the ultra-thin range hood, which has a relatively thin thickness and a relatively simple structure, saves space, and is suitable for small kitchens or open kitchens.

[0003] In the prior art, for the smoke collecting device of the ultra-thin range hood, a rotatable smoke inlet cavity is provided in the smoke collecting cavity. By rotating the smoke inlet cavity, it extends forward to suck in smoke. After the oil fumes enter the smoke inlet cavity, they then flow into the smoke collecting cavity. During the flow of the oil fumes in the smoke inlet cavity, they will contact the inner wall of the smoke inlet cavity and form oil droplets. The oil droplets are prone to condense to form oil scale, and are prone to breed bacteria and molds, thus affecting the health of the kitchen environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a smoke collecting device and a range hood that can avoid the formation of oil scale inside.

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

[0006] A smoke collecting device includes a smoke collecting cavity, a first smoke suction cavity rotatably connected to the upper part of the front plate of the smoke collecting cavity at the top and in gas communication with it, a second smoke suction cavity fixed to the lower part of the front plate of the smoke collecting cavity and in gas communication with it, and an oil box located at the bottom inside the smoke collecting cavity;

[0007] The rotation range of the first smoke suction cavity is limited between its closed state where it is retracted into the smoke collecting cavity and its open state where it extends forward of the smoke collecting cavity. An oil guiding hole allowing the oil droplets inside the first smoke suction cavity to flow out is provided at a position of the first smoke suction cavity far from the part rotatably connected to the front plate. A second concealed smoke suction opening is provided at the top of the second smoke suction cavity;

[0008] When the first smoke suction cavity is in the closed state, the oil droplets in the first smoke suction cavity flow to the oil guiding hole at the bottom of the first smoke suction cavity in sequence, flow into the second smoke suction cavity through the second concealed smoke suction opening, flow into the smoke collecting cavity and finally flow to the oil box;

[0009] When the first smoke suction cavity is in the open state, the oil droplets in the first smoke suction cavity flow to the top of the first smoke suction cavity in sequence, flow into the smoke collecting cavity and finally flow to the oil box.

[0010] As a further improvement of the present invention, a middle region formed by protrusions is provided on the inner surface of the first smoking cavity, and when the first smoking cavity is in an open state, the middle region is inclined downward from front to back, so that the oil droplets in the first smoking cavity are collected in the middle region and flow into the smoke collecting cavity by flowing from front to back.

[0011] As a further improvement of the present invention, on both sides of the middle region on the inner surface of the first smoking cavity, two side regions corresponding to two cooktops on the cooking range are respectively provided. An opening is provided in the side region of the first smoking cavity, and a negative pressure plate is correspondingly provided at the opening of the first smoking cavity. There is a gap between the edge of the negative pressure plate and the corresponding edge of the opening, and this gap forms a first concealed air suction opening.

[0012] As a further improvement of the present invention, the negative pressure plate is located inside the first smoking cavity, so that the space between the negative pressure plate and the opening forms a negative pressure space.

[0013] As a further improvement of the present invention, when the first smoking cavity is in an open state, the negative pressure plate is inclined downward from the outer side edge to the inner side edge, so that the oil droplets formed on the top surface of the negative pressure plate flow from the outer side edge to the inner side edge and drip onto the middle region.

[0014] As a further improvement of the present invention, a window is provided on the front surface of the second smoking cavity for inserting or removing the oil box. A lower panel for closing the window is provided on the surface of the second smoking cavity. The lower panel is detachably connected or movably connected to the second smoking cavity, and the disassembly or movement of the lower panel exposes the window.

[0015] As a further improvement of the present invention, a bottom support structure extending inward to the smoke collecting cavity is provided at the bottom edge of the window on the front surface of the second smoking cavity for supporting the oil box.

[0016] As a further improvement of the present invention, at least one limiting structure is provided on the bottom support structure for limiting the position of the oil box on the bottom support structure.

[0017] As a further improvement of the present invention, first exposed air suction openings are provided on both sides of the first smoking cavity, and second exposed air suction openings are provided on both sides of the second smoking cavity.

[0018] An oil fume machine includes the smoke collecting device and a fan device, and the fan device is connected to the top of the smoke collecting device.

[0019] Advantages of the present invention:

[0020] By setting an oil guiding hole, when the first smoking chamber is in a closed state, the oil droplets formed inside it can flow downward and drip into the second smoking chamber through the oil guiding hole and finally flow into the oil box in the smoke collecting chamber. When the first smoking chamber is in an open state, the oil droplets formed in the first smoking chamber can directly flow into the smoke collecting chamber and flow downward to the oil box. This enables the oil droplets formed inside the first smoking chamber to finally flow into the oil box through different flow paths regardless of whether the first smoking chamber is in an open state or a closed state, while the oil droplets in the second smoking chamber can directly flow into the oil box in the smoke collecting chamber, thus avoiding the accumulation and condensation of oil droplets inside the first smoking chamber and the second smoking chamber into oil scale. Description of the Drawings

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

[0022] Figure 1 is a schematic structural diagram of the smoke collecting device;

[0023] Figure 2 is a three-dimensional schematic diagram of the first smoking chamber in an open state;

[0024] Figure 3 is a three-dimensional schematic diagram of the first smoking chamber in a closed state;

[0025] Figure 4 is a side view schematic diagram of the first smoking chamber in an open state;

[0026] Figure 5 is a side view schematic diagram of the first smoking chamber in a closed state;

[0027] Figure 6 is a smoking schematic diagram of the first smoking chamber in an open state;

[0028] Figure 7 is a smoking schematic diagram of the first smoking chamber in a closed state;

[0029] Figure 8 is a schematic structural diagram of the first smoking chamber;

[0030] Figure 9 is a partial enlarged schematic diagram of the first smoking chamber;

[0031] Figure 10 is a flow schematic diagram of the oil droplets inside the first smoking chamber when it is in an open state;

[0032] Figure 11 is a route schematic diagram of the oil droplets flowing into the oil box when the first smoking chamber is in an open state;

[0033] Figure 12Schematic diagram of the route of oil droplets flowing into the oil box when the first smoking cavity is in the closed state;

[0034] Figure 13 Schematic diagram of the second smoking cavity, window, lower panel and oil box;

[0035] Figure 14 Schematic diagram of the first smoking cavity, second smoking cavity and the configured grille;

[0036] Figure 15 Schematic diagram of the range hood. Specific implementation mode

[0037] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0038] 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 usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0039] Embodiment 1:

[0040] A smoke collecting device, referring to Figures 1-14 , includes a smoke collecting cavity 1, a first smoking cavity 2, and a second smoking cavity 3. Among them, the top of the first smoking cavity 2 is rotatably connected to the smoke collecting cavity 1, the second smoking cavity 3 is fixed to the lower part of the front plate 11 of the smoke collecting cavity 1 and is in gas communication with it. Both the first smoking cavity 2 and the second smoking cavity 3 can suck in oil fume and flow it into the smoke collecting cavity 1. The rotation of the first smoking cavity 2 enables it to be retracted into the smoke collecting cavity 1, which is the closed state of the first smoking cavity 2, and also enables it to extend forward of the smoke collecting cavity 1, which is the open state of the first smoking cavity 2.

[0041] In this embodiment, the first exposed suction opening 2a is arranged on both sides of the first smoking cavity 2, the second exposed suction opening 3a is arranged on both sides of the second smoking cavity 3, and both the first exposed suction opening 2a and the second exposed suction opening 3a can always suck in oil fume and do not depend on the state of the first smoking cavity 2.

[0042] In this embodiment, the first exposed suction opening 2a has a plurality of grilles s arranged at intervals along its own length direction, and the second exposed suction opening 3a has a plurality of grilles s arranged at intervals along its own length direction to improve the structural strength.

[0043] In this embodiment, the first concealed air inlet 2b is disposed on the inner surface of the first smoking chamber 2 and is blocked by the front plate 11 of the smoke collecting chamber 1 when the first smoking chamber 2 is in the closed state. The second concealed air inlet 3b is disposed on the top of the second smoking chamber 3 and is blocked by the first smoking chamber 2 when the first smoking chamber 2 is in the closed state. Therefore, when the first smoking chamber 2 is in the open state, it extends forward relative to the smoke collecting chamber 1, and the bottom and two sides of the first smoking chamber 2, the top and two sides of the second smoking chamber 3 can all suck in cooking fumes, enabling the smoke collecting device to achieve a multi-dimensional smoke intake method, and the smoke intake areas are more and the coverage range is larger, so that the smoke collecting chamber 1 has better smoke suction performance for cooking environments with a large amount of cooking fumes.

[0044] In this embodiment, the two side ends of the second concealed air inlet 3b are connected to the tops of the corresponding two second exposed air inlets 3a, maximizing the smoke suction coverage range of the second smoking chamber 3. In addition, the second concealed air inlet 3b has a plurality of grilles s spaced along its own length direction for enhancing the structural strength.

[0045] In this embodiment, an upper panel 51 is disposed on the outer surface of the first smoking chamber 2, and both side edges of the upper panel 51 extend beyond a part of the two sides of the first smoking chamber 2. A lower panel 52 is disposed on the outer surface of the second smoking chamber 3, and both side edges of the lower panel 52 extend beyond a part of the two sides of the second smoking chamber 3, so that both sides of the upper panel 51 can block the first exposed air inlets 2a on the two sides of the first smoking chamber 2, and both sides of the lower panel 52 can block the second exposed air inlets 3a on the two sides of the second smoking chamber 3, which can not only prevent the first exposed air inlets 2a and the second exposed air inlets 3a from being easily soiled, but also avoid the unsightliness caused by the exposure of the first exposed air inlets 2a and the second exposed air inlets 3a from the perspective facing the smoke collecting device.

[0046] In this embodiment, the bottom edge of the upper panel 51 extends beyond a part of the bottom of the first smoking chamber 2, and the top edge of the lower panel 52 extends beyond a part of the top of the second smoking chamber 3; when the first smoking chamber 2 is in the closed state, the bottom edge of the upper panel 51 is located in front of the top edge of the lower panel 52 and blocks it, and also blocks the second concealed air inlet 3b on the top of the second smoking chamber 3, which can prevent the second concealed air inlet 3b from being soiled.

[0047] In this embodiment, when the smoke collecting device absorbs oil smoke, oil droplets will be generated when the oil smoke enters the first smoking chamber 2, the second smoking chamber 3 and the smoke collecting chamber 1. An oil box 14 is provided at the bottom of the smoke collecting chamber 1, and the oil box 14 is used to collect the oil droplets in the smoke collecting chamber 1. An oil guide hole h is provided at the bottom of the first smoking chamber 2, and the oil guide hole h allows the oil droplets inside the first smoking chamber 2 to flow out, so that the smoke collecting device has two oil paths, corresponding to the first smoking chamber 2 being in an open state and a closed state respectively.

[0048] The first oil path is: when the first smoking chamber 2 is in the closed state, the oil droplets in the first smoking chamber 2 flow to the oil guide hole h at the bottom of the first smoking chamber 2 in sequence, flow into the second smoking chamber 3 through the second concealed air intake port 3b, flow into the smoke collecting chamber 1 and finally flow to the oil box 14.

[0049] The second oil path is: when the first smoking chamber 2 is in the open state, the oil droplets in the first smoking chamber 2 flow to the top of the first smoking chamber 2 in sequence, flow into the smoke collecting chamber 1 and finally flow to the oil box 14 .

[0050] By providing the oil guide hole h, when the first smoking chamber 2 is in a closed state, the oil droplets formed inside it can flow downward and drip into the second smoking chamber 3 through the oil guide hole h and finally flow into the oil box 14 in the smoke collecting chamber 1, while when the first smoking chamber 2 is in an open state, the oil droplets formed in the first smoking chamber 2 can directly flow into the smoke collecting chamber 1 through the first smoking chamber 2 and flow downward to the oil box 14. Whether the first smoking chamber 2 is in an open state or a closed state, the oil droplets formed inside it can finally flow into the oil box 14 through different flow paths, while the oil droplets in the second smoking chamber 3 can directly flow into the oil box 14 of the smoke collecting chamber 1, thereby preventing the oil droplets inside the first smoking chamber 2 and the second smoking chamber 3 from accumulating and condensing into oil scale.

[0051] In this embodiment, a central region 2A and two side regions 2B located on both sides of the central region 2A are provided on the inner surface of the first smoking chamber 2. The two side regions 2B are spaced apart from each other and respectively correspond to two cooktops on the cooking range. Each side region 2B is provided with a first concealed air suction opening 2b, and the first concealed air suction opening 2b is arranged along the edge of the side region 2B. An opening 21 is provided in the side region 2B of the first smoking chamber 2, and a negative pressure plate 22 is correspondingly arranged at the opening 21 of the first smoking chamber 2. There is a gap between the edge of the negative pressure plate 22 and the corresponding edge of the opening 21, and this gap has negative pressure and forms the first concealed air suction opening 2b. On the one hand, the two side regions 2B respectively correspond to the two cooktops on the cooking range, making the smoking of the first smoking chamber 2 more targeted. If the two cooktops are cooking simultaneously, the first concealed air suction openings 2b of the two side regions 2B respectively absorb the oil fumes generated by the two cooktops. If only one cooktop is cooking, the first concealed air suction opening 2b of the side region 2B above it conducts main smoking, while the first concealed air suction opening 2b of the other side region 2B is located at its side, playing an auxiliary smoking role, thus avoiding the lateral escape of oil fumes. On the other hand, since the first concealed air suction opening 2b is formed by the gap between the opening 21 and the edge of the negative pressure plate 22, and the first concealed air suction opening 2b is arranged along the edge of the side region 2B, its smoking range is larger, and the oil fumes are less likely to escape laterally. In particular, it can effectively prevent the oil fumes from escaping from both sides of the first smoking chamber 2.

[0052] In this embodiment, the negative pressure plate 22 is located inside the first smoking chamber 2. Therefore, the direction of the opening 21 of the gap between the edge of the negative pressure plate 22 and the corresponding edge of the opening 21 is limited, so that the space between the negative pressure plate 22 and the opening 21 forms a negative pressure space. The coverage range of this negative pressure space is the range defined by the opening 21. Therefore, its smoking range can be expanded, making the smoking range basically cover the side region 2B. Moreover, the negative pressure intensity at the position corresponding to the first concealed air suction opening 2b in this negative pressure space is the largest, that is, the smoking ability at the edge of the negative pressure space is the strongest, effectively avoiding the escape of oil fumes. In addition, it should be noted that after the oil fumes enter the negative pressure space, they are inhaled by the first concealed air suction opening 2b at the edge of the negative pressure space, reducing the contact between the oil fumes and the bottom surface of the negative pressure plate 22. Therefore, the oil droplets formed on the bottom surface of the negative pressure plate 22 can be reduced.

[0053] In this embodiment, a middle region 2A is formed to protrude on the inner surface of the first smoking chamber 2. That is, when the first smoking chamber 2 is in an open state, the middle region 2A protrudes downward relative to the inner surface of the first smoking chamber 2. Therefore, the oil droplets formed in the first smoking chamber 2 can be gathered in the middle region 2A. In addition, when the first smoking chamber 2 is in an open state, the middle region 2A is inclined downward from front to back, so that the oil droplets in the first smoking chamber 2 are gathered in the middle region 2A and flow into the smoke collecting chamber 1 from front to back. Therefore, when the first smoking chamber 2 is in an open state, the oil droplets formed in the first smoking chamber 2 first converge to the middle region 2A, and then flow into the smoke collecting chamber 1 along the middle region 2A and finally flow into the oil box 14, thereby improving the oil droplet discharge efficiency when the first smoking chamber 2 is in an open state.

[0054] In this embodiment, when the first smoking chamber 2 is in an open state, the oil fume is inhaled through the first concealed air inlet 2b located at the edge of the negative pressure plate 22. The oil fume flows to the space between the negative pressure plate 22 and the outer surface of the first smoking chamber 2, and then flows into the smoke collecting chamber 1. Therefore, most of the oil droplets in the upper oil fume chamber are formed on the top surface of the negative pressure plate 22. When the first smoking chamber 2 is in an open state, the negative pressure plate 22 is inclined downward from the outer side to the inner side, so that the oil droplets formed on the top surface of the negative pressure plate 22 flow from the outer side to the inner side and drip onto the middle region 2A. Therefore, the efficiency of the oil droplets in the first smoking chamber 2 flowing together to the middle region 2A can be improved, and then the oil discharge efficiency when the first smoking chamber 2 is in an open state can be improved.

[0055] In this embodiment, due to the inclined setting of the negative pressure plate 22, the gap width between the outer side edge of the negative pressure plate 22 and the outer edge of the opening 21 is greater than the gap between the inner side edge of the negative pressure plate 22 and the inner edge of the opening 21. Therefore, the smoking amount outside the opening 21 can be increased, and the lateral escape of the oil fume can be effectively avoided.

[0056] In this embodiment, a window 31 is provided on the front surface of the second smoking chamber 3 for inserting or removing the oil box 14. Since the second smoking chamber 3 is connected to the smoke collecting chamber 1, the user can insert or remove the oil box 14 through the window 31. When the smoke collecting device has been used for a certain period of time and the oil amount in the oil box 14 is relatively high, the user can remove the oil box 14 through the window 31 for cleaning, and then insert the clean oil box 14 into the smoke collecting chamber 1 through the window 31, making the cleaning and maintenance work of the user more convenient.

[0057] In this embodiment, the front surface of the second smoking chamber 3 has a bottom support structure 32 that extends inward to the smoke collecting chamber 1 at the bottom edge of the window 31 for supporting the oil cartridge 14. The oil cartridge 14 is supported by the bottom support structure 32, so that the placement state of the oil cartridge 14 in the smoke collecting chamber 1 is relatively firm, avoiding the situation of tipping over. Moreover, the user only needs to take out and insert the oil cartridge 14 to move it in and out, and the operation is relatively convenient. Especially when inserting, there is no need to perform other installation operations to fix it in the smoke collecting chamber 1, making the user's operation more convenient.

[0058] In this embodiment, at least one limiting structure 321 is provided on the bottom support structure 32 for limiting the position of the oil cartridge 14 on the bottom support structure 32, avoiding misalignment when the oil cartridge 14 is inserted, and making the installation position of the oil cartridge 14 in the smoke collecting chamber 1 correct.

[0059] In this embodiment, the limiting structure 321 is formed by a protrusion on the bottom support surface and extends along the insertion and removal direction of the oil cartridge 14. The bottom of the oil cartridge 14 has a limiting chute 141 that cooperates with the limiting structure 321 at the corresponding position of the limiting structure 321. The cooperation of the limiting structure 321 and the limiting chute 141 can accurately position it in the left-right direction.

[0060] In this embodiment, the lower panel 52 closes and covers the window 31 on the front surface of the second smoking chamber 3. This can not only prevent dust from entering the smoke collecting chamber 1 through the window 31, but also make it more beautiful to cover the window 31. The lower panel 52 is detachably or movably connected to the second smoking chamber 3, and the disassembly or movement of the lower panel 52 exposes the window 31. After the user disassembles the lower panel 52 or makes it move away from the front surface of the second smoking chamber 3, the oil cartridge 14 can be taken out from the window 31 for cleaning. After the clean oil cartridge 14 is reinserted into the smoke collecting chamber 1 through the window 31, the panel is then attached to the front surface of the second smoking chamber 3 to close and cover the window 31.

[0061] In this embodiment, the lower panel 52 is rotatably connected to the second smoking cavity 3, and a magnetic attraction component is provided between the lower panel 52 and the second smoking cavity 3 for attaching the lower panel 52 to the front of the second smoking cavity 3. The user only needs to apply a certain force to pull the lower panel 52 outwards to separate the magnetic attraction component, and can flip the lower panel 52 to expose the window 31. After reinserting the oil box 14 from the window 31 into the smoke collecting cavity 1, rotate the lower panel 52 to make it close to the front of the second smoking cavity 3, and the magnetic attraction of the magnetic attraction component will make the lower panel 52 closely attach to the front of the second smoking cavity 3. More specifically, the bottom edge of the lower panel 52 is rotatably connected to the bottom of the second smoking cavity 3, and rotating hinges 521 are respectively provided on both sides of the bottom edge of the lower panel 52 to achieve the rotational connection of the lower panel 52. The magnetic attraction component includes a magnetic attraction stone 522 provided on the upper part of the front of the second smoking cavity 3 and a magnetic attraction plate 523 provided on the inner surface of the lower panel 52.

[0062] Embodiment 2:

[0063] An oil fume extractor, referring to Figure 15 , includes a smoke collecting device and a fan device 6. Among them, the smoke collecting device is as shown in Embodiment 1. The fan device 6 is connected to the top of the smoke collecting device. A fan is provided in the fan device 6. When the fan is started, a negative pressure is formed at the corresponding smoke inlet of the smoke collecting device to suck the oil fume into the smoke collecting cavity 1, then into the fan device 6, and finally discharged through an exhaust pipe (not shown in the figure).

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A smoke collecting device, characterized in that: It comprises a smoke collecting chamber (1), a first smoking chamber (2) whose top is rotatably connected to the upper part of a front plate (11) of the smoke collecting chamber (1), a second smoking chamber (3) fixed to the lower part of the front plate (11) of the smoke collecting chamber (1), and an oil box (14) located at the bottom of the smoke collecting chamber (1); The rotation range of the first smoking chamber (2) is limited between a closed state in which it is retracted into the smoke collecting chamber (1) and an open state in which it is extended toward the front side of the smoke collecting chamber (1); an oil guide hole (h) is provided at a portion of the first smoking chamber (2) away from the rotation connection to the front plate (11) to allow oil droplets inside the first smoking chamber (2) to flow out; and a second concealed air inlet (3b) is provided at the top of the second smoking chamber (3); When the first smoking chamber (2) is in a closed state, the oil droplets in the first smoking chamber (2) flow sequentially to the oil guide hole (h) at the bottom of the first smoking chamber (2), flow into the second smoking chamber (3) through the second concealed air inlet (3b), flow into the smoke collecting chamber (1), and finally flow into the oil box (14); When the first smoking chamber (2) is in an open state, the oil droplets in the first smoking chamber (2) flow sequentially to the top of the first smoking chamber (2), flow into the smoke collecting chamber (1) and finally flow to the oil box (14).

2. The smoke collecting device according to claim 1, characterized in that: A central area (2A) in the form of a protrusion is provided on the inner surface of the first smoking chamber (2), and when the first smoking chamber (2) is in an open state, the central area (2A) is tilted downward from front to back, so that oil droplets in the first smoking chamber (2) gather in the central area (2A) and flow into the smoke collecting chamber (1) from front to back.

3. The smoke collecting device according to claim 2, characterized in that: On the inner surface of the first smoking chamber (2), two side regions (2B) corresponding to two cooking utensils on the stove are respectively arranged on both sides of the middle region (2A); the side region (2B) of the first smoking chamber (2) is arranged with an opening (21); and the first smoking chamber (2) is provided with a negative pressure plate (22) corresponding to the opening (21); a gap is provided between the edge of the negative pressure plate (22) and the edge corresponding to the opening (21), and the gap forms a first concealed air intake port (2b).

4. The smoke collecting device according to claim 3, characterized in that: The negative pressure plate (22) is located in the first smoking chamber (2), so that the space between the negative pressure plate (22) and the opening (21) forms a negative pressure space.

5. The smoke collecting device according to claim 4, characterized in that: When the first smoking chamber (2) is in an open state, the negative pressure plate (22) is tilted downward from the outer edge to the inner edge, so that the oil droplets formed on the top surface of the negative pressure plate (22) flow from the outer edge to the inner edge and drip into the middle area (2A).

6. The smoke collecting device according to claim 1, characterized in that: A window (31) is provided on the front side of the second smoking chamber (3) for moving the oil box (14) in or out, and a lower panel (52) is provided on the surface of the second smoking chamber (3) for closing the window (31). The lower panel (52) and the second smoking chamber (3) are detachably connected or movably connected, and the window (31) is exposed when the lower panel (52) is disassembled or moved.

7. The smoke collecting device according to claim 6, characterized in that: The front side of the second smoking chamber (3) has a bottom support structure (32) extending inwardly into the smoke collecting chamber (1) at the bottom edge of the window (31) and is used to support the oil box (14).

8. The smoke collecting device according to claim 7, characterized in that: At least one limiting structure (321) is provided on the bottom supporting structure (32) for limiting the position of the oil box (14) on the bottom supporting structure (32).

9. The smoke collecting device according to claim 1, characterized in that: Both sides of the first smoking chamber (2) are provided with first exposed air suction ports (2a), and both sides of the second smoking chamber (3) are provided with second exposed air suction ports (3a).

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 (6), wherein the fan device (6) is connected to the top of the smoke collecting device.

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