Range hood

Abstract

The embodiment of the utility model provides a range hood and relates to the technical field of kitchen appliances. The range hood comprises a machine body, a fan and a conical filter screen, the fan and the conical filter screen are both arranged in the machine body, the conical filter screen is provided with a large port, the large port is formed in an air inlet of the fan, and the conical filter screen and the fan are coaxially arranged. By means of the mode that the conical filter screen and the draught fan are coaxially installed, when the negative pressure of the draught fan is used for oil smoke suction, the filtering effect of each position of the whole filter screen can be balanced, the loss of the air volume is reduced, and therefore the filtering effect is improved, and the use comfort level of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and more specifically, to a range hood. Background Technology

[0002] A range hood is a household appliance that purifies the kitchen environment. It can quickly remove the waste from the stove and the fumes produced during cooking and exhaust them outdoors, thereby reducing pollution and purifying the air.

[0003] Currently, the separation of cooking fumes is mainly achieved by installing filters inside the range hood. However, existing range hoods suffer from poor filtration efficiency, affecting the user experience. Utility Model Content

[0004] The purpose of this utility model is to provide a range hood that can improve the filtration effect and enhance user comfort.

[0005] The embodiments of this utility model are implemented as follows:

[0006] An embodiment of this utility model provides a range hood, comprising:

[0007] Organism;

[0008] The fan is installed inside the machine body; and

[0009] The conical filter screen is installed inside the machine body. The conical filter screen has a large port, which is located at the air inlet of the fan, and the conical filter screen is coaxial with the fan.

[0010] In an optional embodiment, the conical filter screen also has a small port, which is arranged opposite to the large port; the range hood also includes a sealing cover, which is disposed on the body and connected to the small port.

[0011] In an optional embodiment, the machine body is provided with an access port, and a sealing cover is detachably disposed on the access port.

[0012] In an optional embodiment, one of the sealing cover and the access port is provided with a snap-fit ​​protrusion, and the other is provided with a snap-fit ​​notch, with the snap-fit ​​protrusion and the snap-fit ​​notch engaging.

[0013] In an optional embodiment, the sealing cover includes a cover body and a first annular rib. The cover body is disposed on the inner wall of the inspection port, and the first annular rib is disposed on the side of the cover body near the conical filter screen. The outer peripheral surface of the first annular rib is provided with a snap-fit ​​protrusion.

[0014] The inspection port is provided with a second annular rib on the side near the conical filter screen. The second annular rib is spaced apart from the first annular rib and is located outside the first annular rib. The second annular rib is provided with a snap-fit ​​notch.

[0015] The cover abuts against the end face of the small port, and the first annular rib is sleeved on the outer wall of the small port.

[0016] In an optional embodiment, the sealing cover further includes a third annular rib, which is disposed on the side of the cover body near the conical filter screen, and the third annular rib, the first annular rib, and the second annular rib are arranged at intervals from the inside to the outside; the third annular rib abuts against the inner sidewall of the small port.

[0017] In an optional implementation, there are multiple snap-fit ​​protrusions and multiple snap-fit ​​notches, with each snap-fit ​​protrusion corresponding to a specific snap-fit ​​notch.

[0018] In an alternative embodiment, the sealing cap has a screw groove on the side away from the small port.

[0019] In an optional embodiment, the cone-shaped filter screen has a folded surface.

[0020] In an optional embodiment, the machine body has a smoke inlet, a smoke collection chamber, and a smoke exhaust outlet, which are connected in sequence. The fan and the conical filter screen are both located in the smoke collection chamber, and the fan outlet is located at the smoke exhaust outlet.

[0021] The beneficial effects of this utility model embodiment include:

[0022] The range hood includes a body, a fan, and a conical filter. Both the fan and the conical filter are located inside the body. The conical filter has a large port, which is located at the air inlet of the fan, and the conical filter is coaxial with the fan.

[0023] As is easily understood, the diameter of the conical filter gradually decreases from the larger end to the side farther away. That is, the closer to the fan's inlet, the larger the diameter of the conical filter; conversely, the farther away from the fan's inlet, the smaller the diameter. Based on the principle of negative pressure distribution in the fan's airflow, the negative pressure is greater closer to the fan's inlet. Therefore, the larger end is placed at the inlet, and the conical filter is installed coaxially with the fan. This allows the fumes to be filtered by the conical filter and then enter the fan's inlet along the axis of the conical filter. Thus, the filtration area of ​​the conical filter gradually increases towards the inlet, and conversely, gradually decreases away from the inlet. With this design, the cone shape of the filter screen can balance the negative pressure on the filter surface, which helps to ensure that the filtration effect is more even and better at every part of the filter screen. Furthermore, placing the cone filter screen at the air inlet of the fan can reduce air volume loss, ensure the proper air performance of the range hood, thereby improving the filtration effect and enhancing user comfort. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a range hood provided in an embodiment of the present utility model;

[0026] Figure 2 A cross-sectional view of a range hood provided in an embodiment of this utility model;

[0027] Figure 3 This is a partial structural schematic diagram of a range hood provided in an embodiment of the present utility model;

[0028] Figure 4 A schematic diagram illustrating the assembly of the conical filter screen and the sealing cap provided in an embodiment of this utility model;

[0029] Figure 5 This is a partial structural diagram of the body provided in an embodiment of the present utility model;

[0030] Figure 6 An assembly diagram of the body and sealing cover provided for an embodiment of this utility model;

[0031] Figure 7 for Figure 6 A magnified view of a section at point A in the middle;

[0032] Figure 8 This is a schematic diagram of the structure of the sealing cap provided in an embodiment of the present utility model.

[0033] Icons: 100-Range hood; 10-Body; 11-Inspection port; 12-Snap-fit ​​notch; 13-Second annular rib; 14-Smoke inlet; 15-Smoke collection chamber; 16-Smoke outlet; 20-Fan; 21-Air inlet; 22-Air outlet; 30-Conical filter; 31-Large port; 32-Small port; 33-Conical surface; 40-Sealing cover; 41-Snap-fit ​​protrusion; 42-Cover; 43-First annular rib; 44-Third annular rib; 45-Twisting groove. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] As described in the background section, the separation of cooking fumes is primarily achieved by installing filters inside the range hood. However, existing range hoods suffer from poor filtration efficiency, negatively impacting the user experience.

[0041] Based on this, please refer to Figures 1-8 The present invention provides a range hood 100 that effectively improves the aforementioned technical problems, namely, it enhances the filtration effect and improves user comfort. The range hood 100 will be described in detail below.

[0042] Please refer to Figures 1-3 , Figure 1 This is a structural schematic diagram of the range hood 100 provided in this embodiment. Figure 2 This is a cross-sectional view of the range hood 100 provided in this embodiment. Figure 3 This is a partial structural schematic diagram of the range hood 100 provided in this embodiment. (Combined with...) Figures 1-3 The range hood 100 includes a body 10, a fan 20, and a conical filter 30. The fan 20 and the conical filter 30 are both located inside the body 10. The conical filter 30 has a large port 31, which is located at the air inlet 21 of the fan 20. The conical filter 30 and the fan 20 are coaxially arranged.

[0043] It is easy to understand that the diameter of the conical filter 30 gradually decreases from the larger port 31 towards the direction away from the larger port 31. That is, the closer to the air inlet 21 of the fan 20, the larger the diameter of the conical filter 30; conversely, the farther away from the air inlet 21 of the fan 20, the smaller the diameter of the conical filter 30. According to the principle of negative pressure distribution of the air intake of the fan 20, the negative pressure is greater closer to the air inlet 21 of the fan 20. Therefore, the larger port 31 is set at the air inlet 21, and the conical filter 30 is installed coaxially with the fan 20, so that after the oil fumes are filtered by the conical filter 30, they enter the air inlet 21 of the fan 20 along the axial direction of the conical filter 30. In this way, the filtration area of ​​the conical filter 30 gradually increases towards the air inlet 21, and conversely, the filtration area of ​​the conical filter 30 gradually decreases towards the direction away from the air inlet 21.

[0044] With this configuration, the cone shape of the cone filter 30 can balance the negative pressure on the filter surface, which helps to ensure that the filtration effect is relatively uniform and good throughout the entire filter. Furthermore, placing the cone filter 30 at the air inlet 21 of the fan 20 can reduce air volume loss, ensure the proper air performance of the range hood, thereby improving the filtration effect and enhancing user comfort.

[0045] It should be noted that by placing the conical filter 30 at the air inlet 21 of the fan 20, the oil fumes will be intercepted and absorbed by the filter in advance, which can reduce the impact of oil fumes on the fan 20, so that the fan 20 can maintain its performance for a long time and extend its service life.

[0046] Furthermore, in this embodiment, the conical filter 30 also has a small port 32, which is positioned opposite to the large port 31. To seal the small port 32 and ensure that all fumes are filtered through the conical surface 33 of the conical filter 30 and enter the interior of the filter, the range hood 100 also includes a sealing cover 40, which is disposed on the body 10 and connected to the small port 32. It can be understood that the conical surface 33 is the filter surface mentioned above.

[0047] It should be noted that in other embodiments, the conical filter 30 may not have a small port 32, and its whole structure is a cone shape. That is, the conical filter 30 only has a large port 31, and the end away from the large port 31 converges to the origin, which can also ensure that the oil fumes are filtered only from the cone surface 33 and enter the interior of the filter.

[0048] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the assembly of the conical filter screen 30 and the sealing cover 40 provided in this embodiment, combined with... Figure 3 and Figure 4In this embodiment, the cone surface 33 of the cone filter 30 is folded, that is, the cone surface 33 is continuously folded, which can increase the contact area with oil fumes, thereby further improving the filtration effect.

[0049] It should be noted that the material of the cone-shaped filter screen 30 can be carbon cloth, non-woven fabric, activated carbon or fiber cloth, or other materials with air-permeable filtration effect. This embodiment does not limit the material.

[0050] For easier maintenance of the range hood 100, please refer to... Figure 5 and Figure 6 , Figure 5 This is a partial structural diagram of the body 10 provided in this embodiment. Figure 6 This is an assembly diagram of the body 10 and the sealing cover 40 provided in this embodiment, combined with... Figure 5 and Figure 6 The machine body 10 is provided with an inspection port 11, and the sealing cover 40 is detachably installed on the inspection port 11.

[0051] In other words, the sealing cover 40 is specifically installed on the body 10, with a portion extending into the body 10. While sealing the inspection port 11, it also seals the small port 32 of the conical filter 30, allowing oil fumes to enter through the conical surface 33 of the conical filter 30, and then, along the axial direction of the conical filter 30, enter the fan 20 through the large port 31 and be discharged. When the range hood 100 needs maintenance, the sealing cover 40 can be directly removed from the inspection port 11. Simultaneously, the conical filter 30 and the sealing cover 40 can be cleaned to ensure filtration efficiency, thus facilitating future maintenance.

[0052] Further, please refer to Figure 7 and Figure 8 , Figure 7 for Figure 6 A magnified view of a portion of point A in the middle. Figure 8 This is a schematic diagram of the structure of the sealing cap 40 provided in this embodiment, combined with... Figures 5-8 One of the sealing cover 40 and the inspection port 11 is provided with a snap-fit ​​protrusion 41, and the other is provided with a snap-fit ​​notch 12. The snap-fit ​​protrusion 41 and the snap-fit ​​notch 12 are engaged.

[0053] It should be noted that in this embodiment, the sealing cover 40 is provided with a snap-fit ​​protrusion 41 and the inspection port 11 is provided with a snap-fit ​​notch 12; of course, in other embodiments, the sealing cover 40 may be provided with a snap-fit ​​notch 12 and the inspection port 11 may be provided with a snap-fit ​​protrusion 41.

[0054] It should also be noted that this embodiment specifically achieves quick installation and removal of the sealing cap 40 through a snap-fit ​​mechanism. In other embodiments, quick removal can also be achieved through threaded connections, magnetic connections, or other methods.

[0055] Please combine Figures 4-8 Specifically, the sealing cover 40 includes a cover body 42 and a first annular rib 43. The cover body 42 is disposed on the inner wall of the inspection port 11, and the first annular rib 43 is disposed on the side of the cover body 42 near the conical filter screen 30, with a snap-fit ​​protrusion 41 on the outer circumferential surface of the first annular rib 43. A second annular rib 13 is disposed on the side of the inspection port 11 near the smoke collection chamber 15, spaced apart from the first annular rib 43 and located outside the first annular rib 43, with a snap-fit ​​notch 12 on the second annular rib 13. The cover body 42 abuts against the end face of the small port 32, and the first annular rib 43 is fitted onto the outer wall of the small port 32.

[0056] By setting the first annular rib 43 and the second annular rib 13, it is easier to process the snap-fit ​​protrusion 41 and the snap-fit ​​notch 12, and improve the snap-fit ​​stability after the two are snapped together. At the same time, the cooperation between the cover 42 and the first annular rib 43 can better seal the small port 32.

[0057] To improve the connection stability between the sealing cover 40 and the conical filter screen 30, and to enhance the sealing performance of the small port 32, in this embodiment, the sealing cover 40 further includes a third annular rib 44. The third annular rib 44 is disposed on the side of the cover body 42 near the conical filter screen 30, and the third annular rib 44, the first annular rib 43, and the second annular rib 13 are arranged alternately from the inside to the outside; the third annular rib 44 abuts against the inner sidewall of the small port 32. In this way, the oil fumes that have been filtered and entered the conical filter screen 30 are less likely to escape from the small port 32, and the oil fumes inside the machine body 10 are also less likely to enter from the small port 32, thereby ensuring the exhaust volume of the fan 20 and improving the filtration effect to a certain extent.

[0058] Please continue to combine Figure 7 and Figure 8 In order to improve the connection stability between the sealing cover 40 and the body 10 and to better seal the inspection port 11, the number of snap-fit ​​protrusions 41 and snap-fit ​​notches 12 can be set to multiple, with multiple snap-fit ​​protrusions 41 and multiple snap-fit ​​notches 12 corresponding one-to-one.

[0059] It should be noted that in this embodiment, there are three snap-fit ​​protrusions 41 and three snap-fit ​​notches 12. Therefore, during installation, it is not necessary to rotate the sealing cap 40 a full turn; simply rotating it clockwise or counterclockwise by a certain angle is sufficient to engage the snap-fit ​​protrusions 41 with the corresponding snap-fit ​​notches 12, thereby improving installation efficiency. Of course, in other embodiments, the number of snap-fit ​​protrusions 41 and snap-fit ​​notches 12 can also be two, four, or five, etc.

[0060] Please combine Figure 1 and Figure 4 To facilitate the rotation of the sealing cover 40, in this embodiment, a screw-in groove 45 is provided on the side of the sealing cover 40 away from the small port 32. That is, when it is necessary to install or remove the sealing cover 40, the operator can put his hand into the screw-in groove 45 and then screw the sealing cover 40.

[0061] It should be noted that in this embodiment, there are two screw-in grooves 45, which are spaced apart. This allows different fingers to be inserted into the two screw-in grooves 45 respectively, making it easier and less strenuous to screw. Of course, in other embodiments, the number of screw-in grooves 45 can be one, three, or four, etc.

[0062] Please continue to combine Figures 1-3 In this embodiment, the body 10 has a smoke inlet 14, a smoke collection chamber 15, and a smoke exhaust outlet 16, which are sequentially connected. A fan 20 and a conical filter 30 are both located in the smoke collection chamber 15, and the air outlet 22 of the fan 20 is located at the smoke exhaust outlet 16. It is easy to understand that under the action of the fan 20, the fumes enter the smoke collection chamber 15 through the smoke inlet 14, are filtered by the conical surface 33 of the conical filter 30, and then enter the interior of the filter. Next, the fumes flow sequentially along the axis of the conical filter 30 through the large port 31, the air inlet 21, and the air outlet 22, and finally are discharged through the smoke exhaust outlet 16. By placing the air outlet 22 of the fan 20 at the smoke exhaust outlet 16, the flow path of the fumes within the body 10 is reduced, allowing for better exhaust and further improving user comfort.

[0063] In summary, the embodiments of this utility model provide a range hood 100, which includes a body 10, a fan 20, and a conical filter 30. The fan 20 and the conical filter 30 are both disposed inside the body 10. The conical filter 30 has a large port 31, which is disposed at the air inlet 21 of the fan 20, and the conical filter 30 is coaxially disposed with the fan 20.

[0064] Understandably, the diameter of the conical filter 30 gradually decreases from the larger port 31 towards the direction away from the larger port 31. That is, the closer to the air inlet 21 of the fan 20, the larger the diameter of the conical filter 30; conversely, the farther away from the air inlet 21 of the fan 20, the smaller the diameter of the conical filter 30. According to the negative pressure distribution principle of the air intake of the fan 20, the negative pressure is greater closer to the air inlet 21 of the fan 20. Therefore, the larger port 31 is set at the air inlet 21, and the conical filter 30 is installed coaxially with the fan 20, so that after the oil fumes are filtered by the conical filter 30, they enter the air inlet 21 of the fan 20 along the axial direction of the conical filter 30. In this way, the filtration area of ​​the conical filter 30 gradually increases towards the air inlet 21, and conversely, the filtration area of ​​the conical filter 30 gradually decreases towards the direction away from the air inlet 21.

[0065] By installing the conical filter screen 30 coaxially with the fan 20, the conical shape of the filter screen 30 can balance the negative pressure on the filter surface under the negative pressure of the fan 20, which helps to make the filtration effect of each part of the filter screen more even and the filtration effect better. Furthermore, placing the conical filter screen 30 at the air inlet 21 of the fan 20 can also reduce the loss of air volume, ensure the air performance of the range hood, thereby improving the filtration effect and enhancing the user's comfort.

[0066] The above description is merely a specific embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A range hood characterized by, The extractor hood (100) comprises: a machine body (10); a fan (20) arranged in the machine body (10); and a conical filter screen (30) arranged in the machine body (10), the conical filter screen (30) having a large port (31) arranged at an air inlet (21) of the fan (20) and being coaxially arranged with the fan (20).

2. The hood according to claim 1, characterized in that, The conical filter screen (30) further has a small port (32) arranged opposite to the large port (31); the extractor hood (100) further comprises a sealing cover (40) arranged in the machine body (10) and connected with the small port (32).

3. The hood according to claim 2, characterized in that, The machine body (10) is provided with an access opening (11), and the sealing cover (40) is detachably arranged in the access opening (11).

4. The hood according to claim 3, characterized in that, One of the sealing cover (40) and the access opening (11) is provided with a clamping protrusion (41), and the other is provided with a clamping notch (12), the clamping protrusion (41) and the clamping notch (12) are matched.

5. The hood according to claim 4, characterized in that, The sealing cover (40) comprises a cover body (42) arranged at an inner side wall of the access opening (11) and a first annular protruding rib (43) arranged at a side of the cover body (42) close to the conical filter screen (30), and an outer peripheral surface of the first annular protruding rib (43) is provided with the clamping protrusion (41); A second annular protruding rib (13) is arranged at a side of the access opening (11) close to the conical filter screen (30), the second annular protruding rib (13) is arranged in a spaced manner with the first annular protruding rib (43) and located at an outer periphery of the first annular protruding rib (43), and the second annular protruding rib (13) is provided with the clamping notch (12); The cover body (42) abuts against an end surface of the small port (32), and the first annular protruding rib (43) is sleeved on an outer side wall of the small port (32).

6. The hood according to claim 5, characterized in that The sealing cover (40) further comprises a third annular protruding rib (44) arranged at a side of the cover body (42) close to the conical filter screen (30), and the third annular protruding rib (44), the first annular protruding rib (43) and the second annular protruding rib (13) are arranged in a spaced manner from inside to outside, and the third annular protruding rib (44) abuts against an inner side wall of the small port (32).

7. The hood according to claim 4, characterized in that, The number of the clamping protrusions (41) and the clamping notches (12) is multiple, and the multiple clamping protrusions (41) and the multiple clamping notches (12) are one-to-one corresponding.

8. The hood according to claim 2, characterized in that, A screw groove (45) is arranged at a side of the sealing cover (40) away from the small port (32).

9. The hood according to claim 1, characterized in that, A conical surface (33) of the conical filter screen (30) is in a fold shape.

10. The hood according to claim 1, characterized in that, The machine body (10) has a smoke inlet (14), a smoke collecting cavity (15) and a smoke outlet (16), the smoke inlet (14), the smoke collecting cavity (15) and the smoke outlet (16) are communicated in sequence, the fan (20) and the conical filter screen (30) are arranged in the smoke collecting cavity (15), and the air outlet (22) of the fan (20) is located at the smoke outlet (16).

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