Oil fume suction system
By installing a top-mounted smoke extraction component and an expansion chamber structure between the range hood and the exhaust duct, the problems of smoke retention and noise are solved, achieving efficient smoke extraction and noise reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-09-19
- Publication Date
- 2026-08-04
AI Technical Summary
Existing range hoods cannot effectively prevent cooking fumes from lingering near the kitchen ceiling during cooking, and increasing the exhaust volume can lead to additional noise problems.
A top-mounted smoke extraction assembly, comprising multiple top sub-smoke extraction assemblies, is installed between the range hood and the exhaust duct. These assemblies are connected by a connecting pipe to form a top-down smoke extraction method. An expansion chamber is used to reduce the airflow velocity of the smoke, and sound-absorbing materials are used to reduce noise.
It effectively prevents cooking fumes from lingering near the ceiling, while also avoiding additional noise, improving fume extraction without increasing exhaust volume.
Smart Images
Figure CN224593344U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil fume extraction technology, and in particular to an oil fume extraction system. Background Technology
[0002] Cooking inevitably produces fumes, which are typically removed by range hoods. However, while most fumes are successfully expelled, a small portion escapes and lingers in the upper space near the kitchen ceiling. Specifically, the negative pressure generated by a range hood can only control the fumes within a certain range of its inlet. If the fumes rise too quickly and exceed the controlled area, they will escape and remain near the ceiling for an extended period.
[0003] To address the aforementioned problems, existing technologies employ methods that increase the exhaust volume of the range hood itself, thereby enhancing its ability to absorb and control cooking fumes and reducing their escape. However, simply increasing the exhaust volume of the range hood using this approach generates significant noise, which can still seriously impact the health of people in the kitchen and their cooking experience.
[0004] Therefore, there is a market demand for fume extraction systems that can prevent cooking fumes from lingering near the kitchen ceiling and also prevent the generation of additional noise. Utility Model Content
[0005] The technical problem to be solved by this utility model is to prevent oil fumes from lingering near the ceiling of the kitchen and to avoid the generation of additional noise, by providing an oil fume extraction system.
[0006] The present invention solves the above-mentioned technical problems through the following technical solution:
[0007] A range hood extraction system includes a range hood and an exhaust duct. The range hood is suspended from the ceiling and includes a smoke duct that is connected to an exhaust duct in the ceiling. The range hood extraction system includes:
[0008] The top-mounted fume extraction assembly is installed between the smoke duct and the exhaust pipe, and it is used to connect the ceiling surface where the range hood is installed with the exhaust pipe.
[0009] In this solution, the range hood in the fume extraction system is suspended from the ceiling. The range hood includes a smoke duct that is connected to the exhaust pipe in the ceiling, thus creating a top-down smoke extraction method.
[0010] In addition to the smoke inlet in the range hood's own smoke duct, the fume extraction system also includes a top-mounted smoke extraction component. This component is located between the smoke duct and the exhaust duct, connecting the ceiling surface where the range hood is mounted to the exhaust duct. Through this method, even without increasing the range hood's exhaust volume, the top-mounted smoke extraction component can effectively extract cooking fumes, especially those that would otherwise linger near the kitchen ceiling, and then direct them through the exhaust duct for final discharge outside the kitchen. Therefore, this fume extraction system avoids cooking fumes accumulating near the kitchen ceiling and also avoids the additional noise generated by increasing the range hood's exhaust volume.
[0011] Preferably, the top smoke extraction assembly includes multiple top sub-smoke extraction assemblies, which are evenly distributed on the surface of the ceiling where the range hood is installed.
[0012] In this solution, multiple top-mounted fume extraction components are evenly distributed on the ceiling surface where the range hood is installed, thereby uniformly extracting fumes from various locations on the ceiling, preventing localized areas from failing to be extracted in a timely manner, and further optimizing the overall fume extraction effect of the fume extraction system.
[0013] Preferably, the multiple top-mounted smoke extraction assemblies are interconnected via a first connecting pipe; and / or, the multiple top-mounted smoke extraction assemblies are connected to the exhaust duct via a second connecting pipe.
[0014] In this solution, multiple top-mounted smoke extraction assemblies are interconnected through a first connecting pipe, thereby ensuring equal air pressure within each top-mounted smoke extraction assembly and allowing smoke to enter each assembly in a uniform manner. The multiple top-mounted smoke extraction assemblies are connected to an exhaust duct through a second connecting pipe, efficiently removing smoke from the kitchen.
[0015] Preferably, the top smoke extraction assembly is a cylindrical body extending vertically into the horizontal plane. The end of the cylindrical body away from the range hood is a sealed end with a closed bottom surface, and the other end of the cylindrical body relative to the sealed end is an open end with a smoke inlet. The cylindrical body is tapered from the sealed end toward the open end.
[0016] In this design, the cylinder is tapered from the sealed end to the open end, meaning the opening is small and the internal cavity is large. This allows the flue gas entering the cylinder to use the cylinder as an expansion chamber. The expansion within the cylinder reduces the flow rate of the flue gas entering the cylinder, thus avoiding noise that may result from excessively high flue gas flow rates.
[0017] Preferably, the sealed ends of the multiple top sub-smoking assemblies are interconnected through a first connecting pipe; and / or, the sealed ends of the multiple top sub-smoking assemblies are connected to the exhaust pipe through a second connecting pipe.
[0018] In this scheme, the sealed ends of multiple top-mounted smoke extraction components are interconnected through a first connecting pipe, and the sealed ends of multiple top-mounted smoke extraction components are connected to the exhaust pipe through a second connecting pipe. This ensures that the flue gas entering the cylinder first expands and decelerates fully in the cylinder before being passed to the exhaust pipe, thus ensuring the actual effect of flue gas deceleration.
[0019] Preferably, the sealed ends of two adjacent top smoking components are connected to each other through a first connecting pipe.
[0020] In this scheme, the sealed ends of two adjacent top sub-smoke assemblies are connected to each other through a first connecting pipe, thus forming an easy-to-implement connection method and avoiding the situation where a single top sub-smoke assembly is connected to other top sub-smoke assemblies that are too far away from it.
[0021] Preferably, the first connecting pipe is connected to the radial side of the sealed end; and / or, the second connecting pipe is connected to the sealed bottom surface.
[0022] In this scheme, the flue gas entering the cylinder first uses a first connecting pipe connected to the radial side of the sealed end to achieve equal air pressure among the top smoke extraction components, and then uses a second connecting pipe connected to the sealed bottom surface to be led to the exhaust pipe, thus optimizing the flue gas treatment process.
[0023] Preferably, the ceiling includes a first panel and a second panel, the smoke exhaust duct is disposed in the first panel, the top smoke extraction assembly is disposed in the second panel, and sound-absorbing material is disposed in the space between the first panel and the second panel.
[0024] In this design, the smoke exhaust duct is installed in the first panel, the top smoke extraction assembly is installed in the second panel, and sound-absorbing material is placed between the first and second panels to reduce noise caused by vibrations from the ceiling.
[0025] Preferably, the top smoke extraction assembly includes multiple top sub-smoke extraction assemblies, which are interconnected by a first connecting pipe located in the space separated by the first plate and the second plate; and / or, the multiple top sub-smoke extraction assemblies are connected to a smoke exhaust pipe by a second connecting pipe located in the space separated by the first plate and the second plate.
[0026] In this design, the first connecting pipe and / or the second connecting pipe are located in the space separated by the first plate and the second plate, thus making reasonable and full use of the space. Both the first plate and the second plate in this design can be made from a single piece of sheet material, eliminating the need to pre-cut grooves for pipe placement on either.
[0027] Preferably, the range hood and the exhaust duct are connected by a connecting pipe, and the second connecting pipe is connected to the connecting pipe; and / or, the connecting pipe is provided with a branch port, which is arranged along the circumference of the connecting pipe, and the first connecting pipe is connected to the exhaust duct through the branch port.
[0028] In this solution, a connecting pipe is installed between the range hood and the exhaust duct. The second connecting pipe is directly connected to the connecting pipe, and the connecting pipe is connected to the first connecting pipe through a branch port, thus providing an easy-to-implement connection method.
[0029] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.
[0030] The positive and progressive effects of this utility model are as follows: the fume extraction system of this utility model can prevent fumes from lingering near the ceiling of the kitchen and can also prevent the generation of additional noise. Attached Figure Description
[0031] Figure 1 A three-dimensional structural schematic diagram (I) of an embodiment of the fume extraction system of this utility model;
[0032] Figure 2 This is a three-dimensional structural schematic diagram (II) of an embodiment of the fume extraction system of this utility model;
[0033] Figure 3 This is an enlarged side view of the cross-sectional structure of an oil fume extraction system according to an embodiment of the present invention;
[0034] Figure 4 This is a three-dimensional structural diagram of the connecting pipe of an oil fume extraction system according to an embodiment of the present invention.
[0035] Explanation of reference numerals in the attached figures:
[0036] Kitchen exhaust system 1
[0037] 10 range hoods
[0038] flue gas passage 20
[0039] Ceiling 30
[0040] First board 31
[0041] Second board 32
[0042] Sound absorbing materials 35
[0043] Smoke exhaust duct 40
[0044] Top smoking component 50
[0045] Top Sub-Smoking Component 51
[0046] Cylinder 501
[0047] 502 Closed End
[0048] Open end 503
[0049] First connecting tube 61
[0050] Second connecting pipe 62
[0051] Connecting pipe 63
[0052] Branch port 631 Detailed Implementation
[0053] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.
[0054] like Figure 1-4 As shown, a range hood system 1 includes a range hood 10 and an exhaust duct 40. The range hood 10 is suspended from the ceiling 30 and includes a smoke passage 20 connected to the exhaust duct 40 in the ceiling 30. The range hood system 1 includes:
[0055] The top smoke extraction assembly 50 is disposed between the smoke duct 20 and the exhaust pipe 40, and the top smoke extraction assembly 50 is used to connect the surface of the ceiling 30 on which the range hood 10 is installed with the exhaust pipe 40.
[0056] In practical implementation, the range hood 10 in the fume extraction system 1 is suspended on the ceiling 30. The range hood 10 includes a smoke duct 20, which is connected to the exhaust pipe 40 in the ceiling 30, thus presenting a top-down smoke extraction method.
[0057] In addition to the smoke inlet of the range hood 10's own smoke duct 20, the fume extraction system 1 also includes a top smoke extraction assembly 50. This top smoke extraction assembly 50 is disposed between the smoke duct 20 and the exhaust pipe 40, and connects the surface of the ceiling 30 where the range hood 10 is mounted to the exhaust pipe 40. Through this method, even without increasing the exhaust volume of the range hood 10 itself, the top smoke extraction assembly 50 can extract cooking fumes, especially those that would otherwise remain near the kitchen ceiling 30, and then direct the fumes to the exhaust pipe 40 and finally discharge them outside the kitchen. Therefore, the fume extraction system 1 in this solution avoids cooking fumes remaining near the kitchen ceiling 30 and also avoids the additional noise generated by increasing the exhaust volume of the range hood 10.
[0058] It should be noted that although the top smoke extraction component 50 in this embodiment is installed in the ceiling 30 to directly extract the smoke that is staying at the ceiling 30, in actual implementation, those skilled in the art can also choose to directly install the top smoke extraction component 50 in the pipe between the smoke passage 20 and the exhaust pipe 40 as an alternative to installing the top smoke extraction component 50 in the ceiling 30. This embodiment does not limit this.
[0059] like Figure 1-4 As shown, the top smoke extraction assembly 50 includes a plurality of top sub-smoke extraction assemblies 51, which are evenly distributed on the surface of the ceiling 30 on which the range hood 10 is mounted.
[0060] In practice, multiple top-mounted fume extraction components 51 are evenly distributed on the surface of the ceiling 30 where the range hood 10 is installed, thereby uniformly extracting the fumes from various locations on the ceiling 30, avoiding the inability to extract local fumes in a timely manner, and further optimizing the overall fume extraction effect of the fume extraction system 1.
[0061] In this embodiment, nine top-mounted smoke extraction components 51 are evenly distributed on the ceiling 30. This arrangement is for illustrative purposes only. In actual implementation, those skilled in the art may also choose to use other numbers of top-mounted smoke extraction components 51, such as fifteen or twenty, evenly distributed according to the actual area of the ceiling 30. This embodiment does not limit this.
[0062] like Figure 1-4 As shown, multiple top sub-smoke assemblies 51 are interconnected via a first connecting pipe 61; and multiple top sub-smoke assemblies 51 are connected to the exhaust pipe 40 via a second connecting pipe 62.
[0063] In practice, multiple top-mounted smoke extraction components 51 are interconnected through a first connecting pipe 61, thereby ensuring equal air pressure within each top-mounted smoke extraction component 51 and allowing smoke to enter each top-mounted smoke extraction component 51 in a uniform manner. The multiple top-mounted smoke extraction components 51 are connected to the exhaust pipe 40 through a second connecting pipe 62, so as to efficiently exhaust the smoke away from the kitchen.
[0064] In this embodiment, the first connecting pipe 61 is a rigid pipe, while the second connecting pipe 62 is a flexible pipe (represented by dashed lines). The rigid pipe provides additional structural strength to the smoking system, while the flexible pipe provides elasticity and damping against vibrations. In practice, those skilled in the art can adjust the materials of the first connecting pipe 61 and the second connecting pipe 62 according to actual needs, for example, using both flexible pipes or both rigid pipes. This embodiment does not limit this.
[0065] like Figure 1-4 As shown, the top sub-smoke assembly 51 is a cylindrical body 501 extending vertically to the horizontal plane. One end of the cylindrical body 501 away from the range hood 10 is a sealed end 502 with a closed bottom surface, and the other end of the cylindrical body 501 relative to the sealed end 502 is an open end 503 with a smoke inlet. The cylindrical body 501 is tapered from the sealed end 502 toward the open end 503.
[0066] In practice, the cylinder 501 is in a contracted shape from the closed end 502 toward the open end 503, that is, the opening is small and the internal cavity is large. Thus, the flue gas entering the cylinder 501 can use the cylinder 501 as an expansion chamber. The expansion made in the cylinder 501 reduces the flow rate of the flue gas entering the cylinder 501, avoiding the noise that may be caused by excessive flue gas flow rate.
[0067] In this embodiment, the cylinder 501 has a smooth inner wall, thus providing a solution that is easy to implement. However, in actual implementation, those skilled in the art should be able to conceive of using a guide plate or other structure that facilitates further deceleration of the flue gas on the inner wall of the cylinder 501, and this embodiment does not limit this to such a design.
[0068] like Figure 1-4 As shown, the sealed ends 502 of the multiple top sub-smoking assemblies 51 are interconnected through the first connecting pipe 61; and the sealed ends 502 of the multiple top sub-smoking assemblies 51 are connected to the exhaust pipe 40 through the second connecting pipe 62.
[0069] In practice, the sealed ends 502 of multiple top-mounted smoke extraction components 51 are interconnected through the first connecting pipe 61, and the sealed ends 502 of multiple top-mounted smoke extraction components 51 are connected to the exhaust pipe 40 through the second connecting pipe 62. This ensures that the flue gas entering the cylinder 501 first expands and slows down fully in the cylinder 501 before being passed to the exhaust pipe 40, thus ensuring the actual effect of flue gas slowing down.
[0070] like Figure 1-4 As shown, the sealed ends 502 of two adjacent top sub-smoking assemblies 51 are connected to each other through the first connecting pipe 61.
[0071] In practice, the sealed ends 502 of two adjacent top sub-smoke assemblies 51 are connected to each other through the first connecting pipe 61, thus forming an easy-to-implement connection method, avoiding the situation where a single top sub-smoke assembly 51 is connected to other top sub-smoke assemblies 51 that are too far away from it.
[0072] like Figure 1-4 As shown, the first connecting pipe 61 is connected to the radial side of the sealed end 502; and the second connecting pipe 62 is connected to the closed bottom surface.
[0073] In practice, the flue gas entering the cylinder 501 first uses the first connecting pipe 61 connected to the radial side of the sealed end 502 to achieve equal air pressure among the top smoke extraction components 51, and then uses the second connecting pipe 62 connected to the sealed bottom surface to be led to the exhaust pipe 40, thus optimizing the process of treating the flue gas.
[0074] It should be noted that in this embodiment, a single row of the first connecting pipe 61 is connected to the radial side of the sealed end 502, thus providing a solution that is easy to implement. However, in actual implementation, the first connecting pipe 61 or the second connecting pipe 62 can also be designed with double or multiple rows as needed to further enhance the efficiency of the connection. This embodiment does not limit this.
[0075] Furthermore, in order to further regulate the flow path of the flue gas, those skilled in the art should be able to conceive of setting a one-way valve or a gas pressure control module in an appropriate location in the flow path, such as in the first connecting pipe 61 or the second connecting pipe 62. This embodiment does not limit this.
[0076] like Figure 1-4 As shown, the ceiling 30 includes a first panel 31 and a second panel 32. The smoke exhaust pipe 40 is disposed in the first panel 31, and the top smoke extraction assembly 50 is disposed in the second panel 32. Sound-absorbing material is disposed in the space separated by the first panel 31 and the second panel 32.
[0077] In practice, the exhaust duct 40 is installed in the first plate 31, the top smoke extraction assembly 50 is installed in the second plate 32, and sound-absorbing material is installed between the first plate 31 and the second plate 32. The sound-absorbing material reduces the noise caused by vibration from the ceiling 30.
[0078] Specifically, the sound-absorbing material used in this embodiment is a sound-absorbing cotton. As an alternative implementation, those skilled in the art should also be able to conceive of using other types of sound-absorbing materials or vibration-damping materials to achieve a similar sound-absorbing effect, such as using spring modules or foam plastics. This embodiment does not limit this.
[0079] like Figure 1-4As shown, the top smoke extraction assembly 50 includes a plurality of top sub-smoke extraction assemblies 51, which are interconnected by a first connecting pipe 61 located in the space separated by the first plate 31 and the second plate 32; and the plurality of top sub-smoke extraction assemblies 51 are connected to the exhaust duct 40 by a second connecting pipe 62 located in the space separated by the first plate 31 and the second plate 32.
[0080] In practical implementation, the first connecting pipe 61 and the second connecting pipe 62 are located in the space separated by the first plate 31 and the second plate 32, thus making reasonable and full use of the space. In this solution, both the first plate 31 and the second plate 32 can be made of whole pieces of material, without the need to pre-cut grooves for arranging pipes on them.
[0081] like Figure 1-4 As shown, the range hood 10 and the exhaust pipe 40 are connected by a connecting pipe 63, and the second connecting pipe 62 is connected to the connecting pipe 63; and the connecting pipe 63 is provided with a branch port 631, which is arranged along the circumference of the connecting pipe 63, and the first connecting pipe 61 is connected to the exhaust pipe 40 through the branch port 631.
[0082] In practice, a connecting pipe 63 is provided between the range hood 10 and the exhaust pipe 40. The second connecting pipe 62 is directly connected to the connecting pipe 63. The connecting pipe 63 is connected to the first connecting pipe 61 through a branch port 631, thus providing an easy-to-implement connection method.
[0083] In this embodiment, the branch port 631 serves as a structure to facilitate transitions, adjusting the connection position of the first connecting pipe 61, which uses a rigid pipe, thereby facilitating the connection between the first connecting pipe 61 and the transition pipe. Given that the second connecting pipe 62 in this embodiment uses a flexible pipe, the flexibility of the flexible pipe itself is fully utilized to achieve the connection between the second connecting pipe 62 and the transition pipe, thus eliminating the need for a similar branch port 631 for the second connecting pipe 62. However, in actual implementation, those skilled in the art should be able to conceive of various adjustments to the branch port 631 on the connecting pipe 63 according to the actual situation, such as the object connected to the branch port 631, the position of the branch port 631, and the number of branch ports 631, etc. This embodiment does not limit these adjustments.
[0084] The fume extraction system 1 can be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the fume extraction system 1 to perform corresponding operations, thereby realizing intelligent control of the fume extraction system 1 and improving the user experience.
[0085] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.
Claims
1. A range hood system comprising a range hood and an exhaust duct, wherein the range hood is suspended from the ceiling, the range hood includes a smoke passage connected to the exhaust duct in the ceiling, characterized in that, The fume extraction system includes: A top-mounted smoke extraction assembly is disposed between the smoke duct and the exhaust pipe, and the top-mounted smoke extraction assembly is used to connect the surface of the ceiling on which the range hood is mounted to the exhaust pipe.
2. The fume extraction system as described in claim 1, characterized in that, The top smoke extraction assembly includes multiple top sub-smoke extraction assemblies, which are evenly distributed on the surface of the ceiling where the range hood is installed.
3. The fume extraction system as described in claim 2, characterized in that, The plurality of the top sub-smoke assemblies are interconnected via a first connecting pipe; and / or, the plurality of the top sub-smoke assemblies are connected to the exhaust duct via a second connecting pipe.
4. The fume extraction system as described in claim 2, characterized in that, The top sub-smoke assembly is a cylindrical body extending vertically into the horizontal plane. One end of the cylindrical body away from the range hood is a sealed end with a closed bottom surface, and the other end of the cylindrical body opposite to the sealed end is an open end with a smoke inlet. The cylindrical body is tapered from the sealed end toward the open end.
5. The fume extraction system as described in claim 4, characterized in that, The sealed ends of the plurality of top sub-smoking assemblies are interconnected via a first connecting pipe; and / or, the sealed ends of the plurality of top sub-smoking assemblies are connected to the exhaust pipe via a second connecting pipe.
6. The fume extraction system as described in claim 5, characterized in that, The sealed ends of two adjacent top sub-smoking assemblies are connected to each other via a first connecting pipe.
7. The fume extraction system as described in claim 5, characterized in that, The first connecting pipe is connected to the radial side of the sealed end; and / or, the second connecting pipe is connected to the sealed bottom surface.
8. The fume extraction system as described in claim 1, characterized in that, The ceiling includes a first panel and a second panel, the smoke exhaust pipe is disposed in the first panel, the top smoke extraction assembly is disposed in the second panel, and sound-absorbing material is disposed in the space separated by the first panel and the second panel.
9. The fume extraction system as described in claim 8, characterized in that, The top smoke extraction assembly includes multiple top sub-smoke extraction assemblies, which are interconnected by a first connecting pipe located in the space between the first plate and the second plate; and / or, the multiple top smoke extraction assemblies are connected to the exhaust duct by a second connecting pipe located in the space between the first plate and the second plate.
10. The fume extraction system as described in any one of claims 3, 5, 7, and 9, characterized in that, The range hood is connected to the exhaust duct via a connecting pipe, and the second connecting pipe is connected to the connecting pipe; and / or, the connecting pipe is provided with a branch port, the branch port is arranged along the circumference of the connecting pipe, and the first connecting pipe is connected to the exhaust duct through the branch port.