Range hood

Abstract

The utility model belongs to the technical field of kitchen electric appliances, and discloses a range hood. The range hood comprises an exhaust fume collecting hood assembly, a fan assembly, a first negative pressure plate and an upper flow channel assembly, an upper exhaust fume inlet and a lower exhaust fume inlet are formed in the front side face of the exhaust fume collecting hood assembly, and the fan assembly is arranged in the exhaust fume collecting hood assembly; the first negative pressure plate is movably connected with the exhaust fume collecting hood assembly so as to open or close the lower exhaust fume inlet; the upper flow channel assembly extends from the top end of the exhaust fume collecting hood assembly to the front side, an upper flow channel communicated with the upper exhaust fume inlet is formed in the upper flow channel assembly, and the upper flow channel assembly is provided with an air inlet communicated with the upper flow channel. Whether the lower smoke inlet is opened or not can be selected according to actual requirements, and interference between the first negative pressure plate and the cookware is avoided; the upper flow channel is always communicated with the interior and the exterior of the exhaust fume collecting hood assembly, so that oil fume suction can be realized when the lower fume inlet is inconvenient to open by the first negative pressure plate, and the use requirement of a user is met; the flow channel can intercept oil fume above the stove, oil fume escape is avoided, and the oil fume suction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art

[0002] The range hood is a smoke extraction device located above the stove. It can quickly remove the smoke and discharge it outdoors. It is an indispensable part of our family. Figure 1 As shown, the traditional range hood includes a main box 2000 and a fume hood assembly 100 arranged below the main box 2000. A fan is arranged inside the main box 2000. This type of range hood is large in size and occupies space in the kitchen cabinet. In order to reduce the size of the range hood, ultra-thin range hoods with bottom-mounted fans have emerged in the industry, such as Figure 2 As shown, the main box 2000 is omitted in the ultra-thin range hood, and the fan is located in the smoke collection chamber of the smoke hood assembly 100 below. The smoke inlet is opened or closed by a rotatable flap 3000. Because of its small size and ability to free up upper cabinet space, it is popular in the market.

[0003] Currently, if Figure 3 and Figure 4 As shown, most of the bottom-mounted fan range hoods have a single smoke inlet. In the wok 5000 scenario, the flap 3000 can rotate normally. In the steamer 6000 scenario, there is a problem that the flap 3000 hits the pot when it opens, and it cannot work effectively. In addition, the opening angle of the flap 3000 is limited, which makes the negative pressure area far away from the pot, and some oil smoke escapes upward. Utility Model Content

[0004] The purpose of the utility model is to provide a range hood that can solve the problems of pot collision and oil smoke escape in a steamer scenario.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A range hood, comprising:

[0007] A smoke collecting hood assembly, wherein the front side of the smoke collecting hood assembly is provided with an upper smoke inlet and a lower smoke inlet;

[0008] A fan assembly is arranged in the smoke collecting hood assembly;

[0009] a first negative pressure plate, the first negative pressure plate being movably connected to the smoke collecting hood assembly to open or close the lower smoke inlet;

[0010] An upper flow channel component extends from the top end of the smoke collecting hood component toward the front side. An upper flow channel connected to the upper smoke inlet is formed in the upper flow channel component. The upper flow channel component is provided with an air inlet connected to the upper flow channel.

[0011] As an optional solution of the above range hood, the first negative pressure plate can rotate relative to the smoke collection hood assembly to open or close the lower smoke inlet;

[0012] Alternatively, the first negative pressure plate is slidably connected to the smoke collecting hood assembly to open or close the lower smoke inlet, and the sliding direction of the first negative pressure plate is a front-to-back direction or an up-down direction.

[0013] As an optional solution of the above range hood, when the first negative pressure plate closes the lower smoke inlet, the outer wall of the first negative pressure plate is coplanar with the front side surface of the smoke collection hood assembly.

[0014] As an optional solution of the above range hood, the upper flow channel assembly includes:

[0015] a shielding portion connected to the top of the smoke collecting hood assembly and extending from the smoke collecting hood assembly toward the front side;

[0016] The second negative pressure plate is suspended below the shielding portion, and the upper flow channel is formed between the shielding portion and the second negative pressure plate.

[0017] As an optional solution for the above range hood, the second negative pressure plate is arranged to be tilted downward from front to back.

[0018] As an optional solution of the above-mentioned range hood, the left and right side edges and / or the front edge of the second negative pressure plate are spaced apart from the shielding portion to form the air inlet.

[0019] As an optional solution of the above-mentioned range hood, the second negative pressure plate is detachably connected to the shielding portion.

[0020] As an optional solution for the above-mentioned range hood, a first rotating part is provided at one end of the second negative pressure plate, and a first plug-in part is provided at the other end. A second rotating part and a second plug-in part are provided on the shielding part. The first rotating part and the second rotating part are detachable and rotatable, and the first plug-in part and the second plug-in part are plug-fitted.

[0021] As an optional solution of the above range hood, the shielding portion includes:

[0022] an upper plate extending horizontally and connected to the smoke collecting hood assembly, wherein the second negative pressure plate is suspended below the upper plate;

[0023] The front plate is connected to the front end of the upper plate, the front plate extends downward from the upper plate, and the front end of the second negative pressure plate is spaced apart from the front plate.

[0024] As an optional solution of the above range hood, the bottom end of the fume hood assembly is connected to an oil cup, and the orthographic projection of the front side surface of the fume hood assembly is located in the oil cup.

[0025] Beneficial effects of the utility model:

[0026] In the range hood provided by the present invention, the first negative pressure plate is used to open and close the lower smoke inlet. Whether to open the lower smoke inlet can be selected according to the cookware used by the user, so as to avoid interference between the first negative pressure plate and the cookware; the upper flow channel assembly is located on the top of the smoke collection hood assembly, and the upper flow channel formed therein can intercept oil smoke from above the stove to prevent oil smoke from escaping and improve the oil smoke absorption effect; and the upper flow channel is in a state of always connecting the inside and outside of the smoke collection hood assembly, so that oil smoke absorption can be achieved when it is inconvenient for the first negative pressure plate to open the lower smoke inlet, thereby meeting the user's usage needs.

[0027] Air inlets are provided on the left and right sides and the front side of the upper flow channel component, which can form an oil fume suction effect with three sides of the top, and the oil fume suction effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a traditional range hood;

[0029] Figure 2 It is a structural diagram of an existing ultra-thin range hood;

[0030] Figure 3 This is a structural diagram of an existing ultra-thin range hood in combination with a frying pan;

[0031] Figure 4 This is a structural diagram of an existing ultra-thin range hood and a steamer;

[0032] Figure 5 This is a schematic structural diagram of the range hood provided by the present invention when the lower smoke inlet is in an open state;

[0033] Figure 6 This is a cross-sectional view of the range hood provided by the present invention when the lower smoke inlet is in an open state;

[0034] Figure 7 This is a first schematic diagram of the range hood provided by the present invention when the lower smoke inlet is in a closed state;

[0035] Figure 8 This is a second schematic diagram of the range hood provided by the present invention when the lower smoke inlet is in a closed state;

[0036] Figure 9 This is a third schematic diagram of the range hood provided by the present invention when the lower smoke inlet is in a closed state;

[0037] Figure 10 This is a side view of the range hood provided by the utility model when the lower smoke inlet is in an open state;

[0038] Figure 11 This is a schematic diagram of the partial structure of the range hood provided by the present invention when the second negative pressure plate is not assembled;

[0039] Figure 12 This is a side view of the range hood and steamer provided by the utility model;

[0040] Figure 13 It is a side view of the range hood and frying pan provided by the utility model in cooperation.

[0041] In the picture:

[0042] 100. Smoke hood assembly; 101. Lower smoke inlet; 102. Upper smoke inlet; 200. First negative pressure plate; 300. Fan assembly; 400. Oil cup; 500. Upper flow channel assembly; 510. Shielding part; 511. Upper plate; 5111. Second plug-in part; 51111. Plug-in slot; 5112. Second rotating part; 51121. Limiting plate; 51122. Hanging rod; 512. Front plate; 520. Second negative pressure plate; 521. First plug-in part; 522. First rotating part; 2000. Main box; 3000. Flip plate; 4000. Cooker; 5000. Wok; 6000. Steamer. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0044] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0047] like Figure 5 and Figure 6 As shown, this embodiment provides a range hood comprising a fume hood assembly 100 and a fan assembly 300. A fume collection chamber is formed within the fume hood assembly 100 and is provided with a fume inlet connected to the fume collection chamber. The fan assembly 300 is disposed within the fume hood assembly 100, with the air intake of the fan assembly 300 connected to the fume inlet, thereby creating a negative pressure at the inlet to draw fume outside the fume hood assembly 100 into the fume collection chamber. The location of the fan assembly 300 within the fume hood assembly 100 helps reduce the size of the range hood and free up space in the cabinet above.

[0048] Specifically, the smoke inlet is located on the front side of the smoke hood assembly 100, and the smoke inlet includes a lower smoke inlet 101 located at the lower end of the smoke hood assembly 100 and an upper smoke inlet 102 at the upper end. The range hood also includes a first negative pressure plate 200 and an upper flow channel assembly 500. The first negative pressure plate 200 is movably connected to the smoke hood assembly 100 to switch between the states of opening the lower smoke inlet 101 and closing the lower smoke inlet 101. The upper flow channel assembly 500 extends from the top of the smoke hood assembly 100 to the front side. An upper flow channel connected to the upper smoke inlet 102 is formed in the upper flow channel assembly 500, and an air inlet connected to the upper flow channel is provided on the upper flow channel assembly 500. It should be noted here that the upper flow channel is formed by the internal space of the upper flow channel assembly 500, and the upper flow channel can accommodate airflow to transport the oil smoke generated by cooking to the smoke hood assembly 100 through the upper flow channel.

[0049] The first negative pressure plate 200 can open the lower smoke inlet 101 without interfering with the cookware, and the oil smoke can enter the smoke collection hood assembly 100 through the lower smoke inlet 101. The lower smoke inlet 101 is close to the stove 4000, and the oil smoke absorption effect is good; the upper flow channel formed by the upper flow channel assembly 500 always connects the inside and outside of the smoke collection hood assembly 100, and can realize the oil smoke absorption function when the first negative pressure plate 200 interferes with the cookware, and the upper flow channel can intercept the escaping oil smoke from the top, thereby improving the overall oil smoke absorption effect of the range hood.

[0050] After the first negative pressure plate 200 closes the lower smoke inlet 101 , the lower smoke inlet 101 can be prevented from being exposed, thereby making the appearance of the range hood more beautiful.

[0051] In some embodiments, the first negative pressure plate 200 can rotate relative to the smoke hood assembly 100 to open or close the lower smoke inlet 101 by flipping. When the first negative pressure plate 200 rotates toward the front of the smoke hood assembly 100, the lower smoke inlet 101 is opened, and the first negative pressure plate 200 and the smoke hood assembly 100 can form a smoke-collecting area, which can improve the oil fume extraction effect; when the first negative pressure plate 200 rotates toward the rear of the smoke hood assembly 100, the lower smoke inlet 101 is closed.

[0052] In order to switch the first negative pressure plate 200 between the states of opening and closing the lower smoke inlet 101, the range hood further includes a first drive assembly, which is disposed on the smoke hood assembly 100 and connected to the first negative pressure plate 200. The first drive assembly is capable of driving the first negative pressure plate 200 assembly to flip relative to the smoke hood assembly 100. Specifically, when the first negative pressure plate 200 switches from the state of closing the lower smoke inlet 101 to the state of opening the lower smoke inlet 101, the first drive assembly drives the bottom end of the first negative pressure plate 200 to flip toward the front side of the smoke hood assembly 100, so as to increase the coverage of the first negative pressure plate 200 to the stove 4000 below.

[0053] In some embodiments, the output end of the first driving assembly is connected to the top of the first negative pressure plate 200 to increase the distance between the first driving assembly and the stove 4000 to avoid interference between the first driving assembly and the stove 4000 or the pot on it.

[0054] In some embodiments, the first drive assembly may include a linear motor and a connecting rod structure. The output end of the linear motor is connected to the connecting rod structure, and the connecting rod structure is connected to the first negative pressure plate 200. After the linear motor is started, the first negative pressure plate 200 is driven to perform a flipping motion through the connecting rod structure.

[0055] Optionally, two groups of connecting rod structures can be set, and connecting rod structures are correspondingly provided on the left and right sides of the first negative pressure plate 200. The linear motor is connected to one of the connecting rod structures. Through the cooperation of the connecting rod structures on both sides, the stability of the first negative pressure plate 200 during the flipping process can be improved to ensure the movement accuracy of the first negative pressure plate 200.

[0056] In other embodiments, the first negative pressure plate 200 can be slidably connected to the smoke hood assembly 100 to open or close the lower smoke inlet 101, thereby preventing the first negative pressure plate 200 from interfering with the cookware after opening the lower smoke inlet 101.

[0057] Optionally, the sliding direction of the first negative pressure plate 200 can be up and down or left and right. Preferably, the sliding direction of the first negative pressure plate 200 is up and down. When the lower smoke inlet 101 needs to be opened, the first negative pressure plate 200 slides upward. The first negative pressure plate 200 can be located in the middle of the front side of the smoke hood assembly 100 so as to be offset from the lower smoke inlet 101. When the lower smoke inlet 101 needs to be closed, the first negative pressure plate 200 slides downward.

[0058] Optionally, the first negative pressure plate 200 and the smoke hood assembly 100 may be connected via a guide assembly to ensure stability of relative sliding. For example, the guide assembly may include a sliding block and a slide rail that are slidably matched.

[0059] Optionally, the first negative pressure plate 200 slides relative to the smoke hood assembly 100 under the drive of a second drive assembly, and the second drive assembly can be a linear motor, a cylinder, a screw nut drive assembly or a gear rack drive assembly.

[0060] In some embodiments, as Figure 5 and Figure 6 As shown, the smoke hood assembly 100 is roughly a rectangular parallelepiped with a regular shape; the front side of the smoke hood assembly 100 is vertically arranged to avoid the pots on the stove 4000, and the cooking space reserved for the pots is larger, which is convenient for users to cook.

[0061] In some embodiments, as Figure 7 As shown, when the first negative pressure plate 200 closes the lower smoke inlet 101, the first negative pressure plate 200 is coplanar with the front side of the smoke hood assembly 100.

[0062] In order to reduce the size of the smoke hood assembly 100 along the front-to-back direction, in some embodiments, the axis of the fan assembly 300 extends along the front-to-back direction, the front axial end face of the fan assembly 300 is the air inlet face, and an air inlet is formed to facilitate facing and connecting with the lower smoke inlet 101 and the upper smoke inlet 102; the outer peripheral surface of the fan assembly 300 is the air outlet face, so that the size of the smoke hood assembly 100 along the front-to-back direction can be slightly larger than the axial size of the fan assembly 300, so as to reduce the thickness of the smoke hood assembly 100 along the front-to-back direction and realize the ultra-thin design of the range hood.

[0063] In order to filter the oil smoke, the range hood further comprises a filter screen, and a filter screen is provided at both the lower smoke inlet 101 and the upper smoke inlet 102. When the range hood is working, the oil smoke passes through the filter screen and filters the oil dirt before entering the interior of the smoke collecting hood assembly 100.

[0064] As the range hood is used, grease accumulates on its surface. This grease collects and flows downward under gravity, posing a risk of dripping onto the stove 4000 or pots. To address this issue, a detachable oil cup 400 is attached to the bottom of the fume hood assembly 100. This cup is used to collect the grease. This allows grease attached to the filter to flow along the surface of the fume hood assembly 100 and into the cup, collecting the grease.

[0065] To facilitate the collection of oil stains adhering to the front side of the fume hood assembly 100, the front surface of the oil cup 400 is located in front of the front side of the fume hood assembly 100. In other words, the orthographic projection of the front side of the fume hood assembly 100 is located within the oil cup 400, ensuring that oil stains flowing along the front side of the fume hood assembly 100 can drip into the oil cup 400.

[0066] In some embodiments, the oil cup 400 can be fixed to the smoke hood assembly 100 by fasteners such as screws, or the oil cup 400 can be hung on the lower end of the smoke hood assembly 100 by a hook to facilitate the disassembly and assembly of the oil cup 400, thereby making it convenient for users to clean the oil cup 400 regularly.

[0067] In some embodiments, as Figure 5-Figure 8 As shown, the upper flow channel assembly 500 includes a shielding portion 510 and a second negative pressure plate 520. The shielding portion 510 is connected to the top of the smoke hood assembly 100 and extends forward from the smoke hood assembly 100. The second negative pressure plate 520 is suspended below the shielding portion 510. The space between the shielding portion 510 and the second negative pressure plate 520 forms an upper flow channel, which is connected to the upper smoke inlet 102. The shielding portion 510 and the second negative pressure plate 520 enclose the upper flow channel, which not only increases the oil smoke flow channel for multi-dimensional smoke extraction, but also intercepts escaping oil smoke above the stove 4000, significantly improving the range hood's extraction capacity.

[0068] It can be understood that, on the basis of the unchanged size of the second negative pressure plate 520 and the shielding portion 510, the flow area of the upper flow channel is determined by the distance between the second negative pressure plate 520 and the shielding portion 510. The greater the distance between the second negative pressure plate 520 and the shielding portion 510 in the up and down directions, the larger the flow area of the upper flow channel.

[0069] In some embodiments, the left and right sides and the front of the upper flow channel are all open, enabling three-sided air intake, providing wider coverage of the cooktop 4000 and improving fume extraction. Specifically, the left and right edges and the front edge of the second negative pressure plate 520 are spaced apart from the shielding portion 510 to form air inlets on three sides of the upper flow channel assembly 500.

[0070] In some embodiments, the shielding portion 510 includes an upper plate 511 and a front plate 512. The upper plate 511 extends horizontally and is connected to the front top of the fume hood assembly 100. The second negative pressure plate 520 is suspended below the upper plate 511. The front plate 512 is connected to the front end of the upper plate 511 and extends downward from the upper plate 511. The upper plate 511 and the front plate 512 are generally in an inverted L-shape, which can gather and guide the oil smoke at the top. The upward-flowing oil smoke is blocked by the front plate 512 and flows along the bottom surface of the upper plate 511 to the rear side, thereby entering the upper flow channel and preventing the oil smoke from escaping.

[0071] Optionally, the left and right edges of the second negative pressure plate 520 are spaced apart from the upper plate 511 in the vertical direction to form air inlets on the left and right sides of the upper flow channel; the front end edge of the second negative pressure plate 520 is spaced apart from the front plate 512 in the front-to-back direction, and is spaced apart from the upper plate 511 in the up-down direction to form the front air inlet of the upper flow channel.

[0072] In some embodiments, the second negative pressure plate 520 can be spaced apart from the shielding portion 510 at any edge of the left and right sides and the front side to form an air inlet.

[0073] In some embodiments, the shielding portion 510 and the smoke hood assembly 100 may be integrally formed to reduce the number of parts and simplify assembly.

[0074] refer to Figure 8 、 Figure 9 and Figure 12 As shown, when the first negative pressure plate 200 is in the position of closing the lower smoke inlet 101, the range hood only absorbs oil smoke through the upper flow channel. Air inlets are set on the front side and left and right sides of the upper flow channel component 500, forming an oil smoke extraction effect with three sides of the top surrounded by air, which has a good covering effect on the oil smoke, and the range hood will not interfere with the cookware, meeting the needs of slow users.

[0075] refer to Figure 10 and Figure 13As shown, when the first negative pressure plate 200 is in the state of opening the lower smoke inlet 101, the side flow channel surrounded by the first negative pressure plate 200 and the smoke hood assembly 100 forms a single-sided wide-area oil fume suction effect, and the lower smoke inlet 101 is close to the stove 4000, so the oil fume suction effect is good; at the same time, the upper flow channel forms a three-sided oil fume suction effect on the top surface, which can prevent the oil fume from escaping.

[0076] It's important to note that the side flow channel refers to the space between the first negative pressure plate 200 and the front side of the smoke hood assembly 100 when the first negative pressure plate 200 is flipped forward relative to the smoke hood assembly 100. The size of this space determines the size of the side flow channel. In other words, if the dimensions of the first negative pressure plate 200 and the smoke hood assembly 100 remain unchanged, the larger the angle between them, the larger the side flow channel.

[0077] To facilitate the flow of oil contamination from the second negative pressure plate 520 into the oil cup 400, in some embodiments, the second negative pressure plate 520 is tilted downward from front to back. This arrangement allows the oil contamination on the second negative pressure plate 520 to flow along the top or bottom surface of the second negative pressure plate 520 to the rear end of the second negative pressure plate 520 under the action of gravity, where it drips down. This allows the oil contamination on the second negative pressure plate 520 to drip down at the rear end, thereby improving the collection efficiency of the oil contamination on the second negative pressure plate 520.

[0078] In some embodiments, the angle between the second negative pressure plate 520 and the horizontal direction can be greater than or equal to 4° to ensure the diversion effect on the oil pollution. For example, the angle between the second negative pressure plate 520 and the horizontal direction can be 5°, 6°, 7°, 8°, 9° or 10°.

[0079] In some embodiments, as Figure 9 As shown, the rear end of the second negative pressure plate 520 extends to contact or be spaced apart from the front side of the smoke hood assembly 100, so that part of the oil stains on the second negative pressure plate 520 can flow from its rear end to the smoke hood assembly 100, and then flow from the smoke hood assembly 100 to the oil cup 400.

[0080] In order to facilitate cleaning of the second negative pressure plate 520 , the second negative pressure plate 520 and the shielding portion 510 are detachably connected to facilitate removal of the second negative pressure plate 520 for cleaning.

[0081] In some embodiments, as Figure 11As shown, the second negative pressure plate 520 is provided with a first rotating portion 522 and a first plug-in portion 521, and the first rotating portion 522 and the first plug-in portion 521 are respectively located at the two ends of the first negative pressure plate 200; correspondingly, the bottom surface of the upper plate 511 is provided with a second rotating portion 5112 and a second plug-in portion 5111, and the first rotating portion 522 and the second rotating portion 5112 are detachably rotatably connected, and the first plug-in portion 521 and the second plug-in portion 5111 are plugged into each other to fix the second negative pressure plate 520 to the shielding portion 510.

[0082] When installing the second negative pressure plate 520, the first rotating part 522 can be matched with the second rotating part 5112 first, and the second negative pressure plate 520 can be rotated with the matching position of the two as the hinge point, so that the first plug-in part 521 and the second plug-in part 5111 are aligned and plugged together to complete the assembly.

[0083] In some embodiments, a first rotating portion 522 is provided on both sides of one end of the second negative pressure plate 520, and a first plug-in portion 521 is provided on both sides of the other end of the first negative pressure plate 200 to improve the fixing effect of the second negative pressure plate 520 and the shielding portion 510.

[0084] Exemplarily, the first rotating part 522 is a hook, and the second rotating part 5112 includes a hanging rod 51122. The hook can be hung on the hanging rod 51122 to achieve preliminary positioning of the second negative pressure plate 520 and the shielding part 510, facilitating the cooperation between the first plug-in part 521 and the second plug-in part 5111.

[0085] Specifically, the second rotating part 5112 also includes two limiting plates 51121 arranged opposite to each other, and the hanging rod 51122 is respectively connected to the two limiting plates 51121. When the hook is matched with the hanging rod 51122, it is located between the two limiting plates 51121 to limit the hook and improve the matching stability.

[0086] Exemplarily, the hook is located at the rear end of the second negative pressure plate 520, the first plug-in portion 521 is located at the front end of the second negative pressure plate 520, and the opening of the hook faces the rear side, thereby increasing the stability of the hook-to-hook cooperation and preventing separation.

[0087] Exemplarily, the second plug-in portion 5111 can be provided with a plug-in groove 51111, and the first plug-in portion 521 can be removed into the plug-in groove 51111 and snap-fit or interference-fit with the plug-in groove 51111 to achieve the purpose of fixing the second negative pressure plate 520.

[0088] In some embodiments, the first rotating portion 522 may include a hanging rod, and correspondingly, the second rotating portion 5112 is a hook; the first plug-in portion 521 may be a plug-in slot, and correspondingly, the second plug-in portion 5111 is inserted into the plug-in slot.

[0089] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A range hood, characterized in that: include: A smoke collecting hood assembly (100), wherein the front side of the smoke collecting hood assembly (100) is provided with an upper smoke inlet (102) and a lower smoke inlet (101); A fan assembly (300) is disposed in the smoke collecting hood assembly (100); a first negative pressure plate (200), the first negative pressure plate (200) being movably connected to the smoke collecting hood assembly (100) to open or close the lower smoke inlet (101); An upper flow channel component (500) extends from the top end of the smoke hood component (100) toward the front side, an upper flow channel connected to the upper smoke inlet (102) is formed in the upper flow channel component (500), and the upper flow channel component (500) is provided with an air inlet connected to the upper flow channel.

2. The range hood according to claim 1, characterized in that: The first negative pressure plate (200) can rotate relative to the smoke collecting hood assembly (100) to open or close the lower smoke inlet (101); Alternatively, the first negative pressure plate (200) is slidably connected to the smoke collecting hood assembly (100) to open or close the lower smoke inlet (101), and the sliding direction of the first negative pressure plate (200) is a front-to-back direction or an up-down direction.

3. The range hood according to claim 1, characterized in that: When the first negative pressure plate (200) closes the lower smoke inlet (101), the outer wall of the first negative pressure plate (200) is coplanar with the front side surface of the smoke collecting hood assembly (100).

4. The range hood according to any one of claims 1 to 3, characterized in that: The upper flow channel assembly (500) comprises: A shielding portion (510) is connected to the top end of the smoke collecting hood assembly (100) and extends from the smoke collecting hood assembly (100) toward the front side; The second negative pressure plate (520) is suspended below the shielding portion (510), and the upper flow channel is formed between the shielding portion (510) and the second negative pressure plate (520).

5. The range hood according to claim 4, characterized in that: The second negative pressure plate (520) is arranged to be tilted downward from front to back.

6. The range hood according to claim 4, characterized in that: The left and right side edges and / or the front side edge of the second negative pressure plate (520) are spaced apart from the shielding portion (510) to form the air inlet.

7. The range hood according to claim 6, characterized in that: The second negative pressure plate (520) is detachably connected to the shielding portion (510).

8. The range hood according to claim 7, characterized in that: One end of the second negative pressure plate (520) is provided with a first rotating part (522), and the other end is provided with a first plug-in part (521); the shielding part (510) is provided with a second rotating part (5112) and a second plug-in part (5111); the first rotating part (522) and the second rotating part (5112) are detachable and rotatable, and the first plug-in part (521) and the second plug-in part (5111) are plug-in compatible.

9. The range hood according to claim 6, characterized in that: The shielding portion (510) comprises: an upper plate (511), the upper plate (511) extending horizontally and connected to the smoke hood assembly (100), the second negative pressure plate (520) being suspended below the upper plate (511); The front plate (512) is connected to the front end of the upper plate (511), and the front plate (512) extends downward from the upper plate (511). The front end of the second negative pressure plate (520) is spaced apart from the front plate (512).

10. The range hood according to any one of claims 1 to 3, characterized in that: The bottom end of the fume hood assembly (100) is connected to an oil cup (400), and the orthographic projection of the front side of the fume hood assembly (100) is located in the oil cup (400).

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