Range hood

Abstract

The utility model relates to the field of range hoods, and provides a range hood, which comprises a fan, a shell and a first rectifying component, and the fan is provided with a main air suction port; an air flow channel is formed between the machine shell and the fan in a surrounding mode and communicates with the main air suction port; the first rectifying component is arranged in the airflow channel and corresponds to the main air suction port. According to the range hood, the first rectifying component is arranged at the corresponding position of the main air suction port of the fan to adjust the flow velocity distribution of the airflow in the airflow channel and flowing to the main air suction port, so that the non-uniformity of the flow state in the range hood is reduced, the flow velocity uniformity of the airflow in the airflow channel and flowing to the main air suction port is improved, and the turbulence level of a flow field is reduced; and on the other hand, the first rectifying component can serve as a sound insulation medium to a certain degree, and noise propagation is weakened on the propagation path.

Description

Technical Field

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

[0002] The existing range hoods have extremely uneven internal airflow, which easily causes large flow energy losses. At the same time, the turbulent flow can also lead to the deterioration of the internal flow field of the fan, further increasing the aerodynamic noise. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model proposes a range hood, which can improve the uniformity of the airflow velocity in the airflow channel and flowing to the main air intake port, reduce the turbulence of the flow field, and reduce the generation of aerodynamic noise. At the same time, the first rectifying component can also act as a sound insulation medium to a certain extent, reducing the propagation of noise on the propagation path.

[0004] A range hood according to an embodiment of the utility model.

[0005] A fan, wherein the fan is provided with a main air intake port;

[0006] A casing, an air flow channel is enclosed between the casing and the fan, and the air flow channel is communicated with the main air inlet;

[0007] A first rectifying component is arranged in the air flow channel and is arranged corresponding to the main air intake port.

[0008] According to an embodiment of the utility model, the first rectifying component is arranged perpendicularly to the plane where the main air inlet is located, and the first rectifying component is arranged perpendicularly on the flow path of the airflow in the airflow channel.

[0009] According to an embodiment of the present utility model, the first rectifying component is horizontally arranged in the air flow channel and is located above the middle of the air flow channel.

[0010] According to an embodiment of the present utility model, the first rectifying component is arranged on the axial plane of the main air intake port.

[0011] According to an embodiment of the utility model, it further includes a second rectifying component, which is arranged in the air flow channel and located below the main air intake port.

[0012] According to an embodiment of the present invention, the flow rate of the first rectifying component is smaller than the flow rate of the second rectifying component.

[0013] According to an embodiment of the present utility model, the first rectifying component and the second rectifying component are arranged parallel to each other.

[0014] According to an embodiment of the utility model, at least one of the first rectifying component and the second rectifying component is a rectifying net, the rectifying net includes a net portion and a frame, the frame is arranged on the outer peripheral side of the net portion, and the frame is connected and fixed to the inner wall of the casing.

[0015] According to an embodiment of the present utility model, the first rectifying component is a rectifying net, and the first rectifying component is provided with the frame on the peripheral side away from the main air inlet.

[0016] According to one embodiment of the utility model, the casing includes a front side panel and a rear side panel which are arranged opposite to each other in the front and rear directions, the fan also includes a secondary air intake port opposite to the main air intake port, the main air intake port is opposite to the rear side panel, the secondary air intake port is opposite to the front side panel, the second rectifying component is connected between the front side panel and the rear side panel, and the first rectifying component is connected between the rear side panel and the fan.

[0017] The above one or more technical solutions in the embodiments of the utility model have at least one of the following technical effects: the application provides a range hood, by arranging a first rectifying component at a corresponding position of the main air intake port of the fan to adjust the airflow velocity distribution in the airflow channel and flowing to the main air intake port, thereby reducing the unevenness of the flow state inside the range hood, improving the uniformity of the airflow velocity in the airflow channel and flowing to the main air intake port, reducing the turbulence of the flow field, and reducing the generation of aerodynamic noise. On the other hand, the first rectifying component can also act as a sound insulation medium to a certain extent, reducing the propagation of noise on the propagation path.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural schematic diagram of a range hood provided by an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 A cross-sectional view of a mid-range hood;

[0022] Figure 3 yes Figure 2 Schematic diagram of the connection position between the blower and the first rectifying component and the second rectifying component.

[0023] Reference numerals:

[0024] 10. Range hood;

[0025] 100, housing; 110, front side panel; 120, rear side panel;

[0026] 200, fan; 210, main air inlet; 220, secondary air inlet;

[0027] 300, air flow channel;

[0028] 400, first rectifying component; 410, mesh portion; 420, frame;

[0029] 500. A second rectifying component. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0031] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] Range hoods use the rapid rotation of the built-in fan to absorb and exhaust the fume pollutants produced by cooking, keeping the kitchen air fresh and healthy. The larger the air volume of the range hood, the stronger its back pressure resistance, which means the better the fume exhaust effect. However, large air volume corresponds to a significant increase in fan speed and noise level, which seriously affects the comfort of cooking. Solving the contradictory relationship between air volume and noise level is the key to improving the performance of range hoods. Affected by factors such as appearance, structural components, fan installation method, and flue back pressure, the internal flow field of the range hood is uneven, accompanied by turbulent and vortex flow. The turbulent flow field not only produces large flow losses, but is also the main source of aerodynamic noise.

[0036] The fan is usually arranged vertically, with its impeller axially perpendicular to the front and rear panels of the frame. When the airflow enters the range hood duct, part of it bends 90 degrees at the lower part of the fan along the axial direction and enters the fan, while the rest of the airflow rises to the top of the frame and changes direction before entering the fan. Such unsmooth airflow forms a large vortex area in the frame, making the flow field velocity distribution complex and chaotic. In the user's use environment, the back pressure of the range hood exhaust pipe is large, the airflow in the duct is more unsmooth, the vortex intensity and turbulence are further increased, and greater aerodynamic noise is caused.

[0037] The utility model provides a range hood.

[0038] In the utility model embodiment, refer to Figures 1 to 3 The present application provides a range hood 10, which includes a fan 200, a casing 100 and a first rectifying component 400, the fan 200 is provided with a main air intake port 210; an air flow channel 300 is enclosed between the casing 100 and the fan 200, and the air flow channel 300 is connected to the main air intake port 210; the first rectifying component 400 is arranged in the air flow channel 300 and is arranged corresponding to the main air intake port 210.

[0039] The main function of the fan 200 is to generate negative pressure, suck in the fumes generated during cooking and exhaust them outdoors. The fan 200 is provided with a main air inlet 210, which is the main channel for the fumes to enter the fan 200. The performance of the fan 200 (such as air volume, air pressure, etc.) directly affects the exhaust effect of the range hood 10.

[0040] The casing 100 is the external structure of the range hood 10 and not only protects the internal components, but also the casing 100 and the fan 200 enclose an air flow channel 300 which is connected to the main air inlet 210 to ensure that the oil smoke can smoothly enter the fan 200.

[0041] The first rectifying component 400 is disposed in the airflow channel 300 and is disposed corresponding to the main air inlet 210 . Its main function is to adjust the flow velocity distribution of the airflow in the airflow channel 300 and toward the main air inlet 210 .

[0042] When the oil smoke enters the air flow channel 300, the first rectifying component 400 can make the air flow velocity distribution more uniform and stable, reduce the unevenness and turbulence of the flow field, thereby reducing vortices and turbulence, improving the stability of the air flow, and further improving the suction and exhaust efficiency of the range hood 10.

[0043] By optimizing the airflow, the first rectifying component 400 can also reduce the generation of aerodynamic noise. Since the airflow is more stable, vortices and turbulence are reduced, the aerodynamic noise is also reduced accordingly. At the same time, the rectifying component itself also has a certain sound insulation effect, which can reduce the propagation of noise on the noise propagation path.

[0044] Reference Figure 2 and Figure 3 According to an embodiment of the present invention, the first rectifying component 400 is arranged perpendicularly to the plane where the main air inlet 210 is located, and the first rectifying component 400 is arranged perpendicularly on the flow path of the airflow in the airflow channel 300 .

[0045] It can be understood that, in this embodiment, the first rectifying component 400 is perpendicular to the plane of the main air inlet 210 of the fan 200, thereby ensuring that it can directly intercept and adjust the airflow entering the main air inlet 210 from all directions. The first rectifying component 400 is vertically arranged on the flow path of the airflow in the airflow channel 300. It can ensure that the airflow is guided and optimized to the greatest extent when flowing through the rectifying component, thereby reducing turbulence and improving the stability and uniformity of the airflow.

[0046] When the range hood is started, the mixture of oil smoke and air enters the airflow channel 300 through the air inlet of the housing 100. When the airflow flows through the first rectifying component 400, the direction and speed of the airflow are optimized and adjusted due to the presence of the first rectifying component 400, so that the unstable or turbulent airflow that may exist originally will be transformed into a stable and uniform airflow, so as to enter the main air intake port 210 more smoothly.

[0047] Optionally, the specific shape and structure of the first rectifying component 400 may be customized according to the size and shape of the airflow channel 300 .

[0048] Reference Figure 2 and Figure 3 According to an embodiment of the present utility model, the first rectifying component 400 is horizontally arranged in the air flow channel 300 and is located above the middle of the air flow channel 300 .

[0049] It can be understood that the fan 200 is generally arranged vertically, and its impeller axis is perpendicular to the front and rear panels of the frame. When the airflow enters the air duct of the range hood 10, part of it bends at an angle of 90° and enters the fan 200 axially at the lower part of the fan 200, and the remaining part of the airflow rises to the top of the housing 100 and changes its flow direction before entering the fan 200. Such unsmooth airflow forms a large vortex area in the frame, making the flow field velocity distribution complex and chaotic. However, the present application arranges the first rectifying component 400 in a horizontal state in the airflow channel 300, that is, its long axis is parallel to the ground, and the first rectifying component 400 is located in the middle and above area of ​​the airflow channel 300. The specific position can be adjusted according to the size and shape of the airflow channel 300, but it is usually set at a place close to the main air inlet 210, so that the airflow that enters the fan 200 after part of the airflow rises to the top of the housing 100 and changes its flow direction can maximize its rectifying effect.

[0050] Specifically, in one embodiment, the first rectifying component 400 is disposed on the axial plane of the main air inlet 210 .

[0051] It is understandable that in this embodiment, the first rectifying component 400 is arranged on the axial plane of the main air inlet 210 so that the airflow entering the main air inlet 210 from all directions can be adjusted by the rectifying component to a greater extent, thereby achieving a more uniform and stable airflow distribution.

[0052] When the range hood 10 is turned on, the mixture of oil smoke and air enters the air flow channel 300 through the air inlet. Since the first rectifying component 400 is arranged on the axial plane of the main air inlet 210, the air flow will be uniformly guided and regulated when flowing through the rectifying component. The design of the rectifying component can reduce the turbulence and vortex in the air flow, so that the air flow enters the main air inlet 210 more stably and uniformly, thereby improving the suction and exhaust efficiency of the range hood 10 and reducing the aerodynamic noise.

[0053] Reference Figure 2 and Figure 3 According to an embodiment of the present invention, a second rectifying component 500 is further included. The second rectifying component 500 is disposed in the air flow channel 300 and below the main air inlet 210 .

[0054] It is understandable that the second rectifying component 500 is installed in the airflow channel 300 and is located below the main air intake port 210. This ensures that the airflow entering the airflow channel 300 from below (i.e., the smoke inlet of the range hood) will first be rectified by the second rectifying component 500, and then flow to the top of the housing 100 or merge with the top airflow adjusted by the first rectifying component 400 after rectification by the first rectifying component 400, and enter the main air intake port 210 together to form a more uniform and stable airflow distribution. By introducing the second rectifying component 500, the airflow distribution in the airflow channel 300 can be further optimized, so that the airflow enters the main air intake port 210 more uniformly and stably, thereby improving the suction and exhaust efficiency of the range hood 10.

[0055] Reference Figure 3 According to one embodiment of the present invention, the flow rate of the first rectifying component 400 is smaller than the flow rate of the second rectifying component 500 .

[0056] It can be understood that the first rectifying component 400 is suitable for rectifying the airflow returning from the top of the casing 100 to the main air intake port 210, while the second rectifying component 500 is suitable for rectifying all oil smoke entering from the suction port of the range hood 10. In order to adapt to each other's flow rate, the flow rate of the first rectifying component 400 in this embodiment is smaller than the flow rate of the second rectifying component, thereby ensuring that the two rectifying components can respectively and efficiently process their respective airflows and optimize the overall performance.

[0057] Reference Figure 2 According to an embodiment of the present invention, the first rectifying component 400 and the second rectifying component 500 are arranged parallel to each other.

[0058] It is understandable that the present embodiment coordinates the rectification of the oil smoke in the airflow channel 300 by arranging the first rectifying component 400 and the second rectifying component 500 in parallel with each other. This helps to ensure that the airflow is fully rectified and adjusted before entering the main air intake port 210, thereby achieving a more uniform and stable airflow distribution. In addition, the rectifying components arranged in parallel can more effectively handle airflows of different sources and characteristics. The first rectifying component 400 handles the return airflow, while the second rectifying component 500 handles the main oil smoke airflow entering from the smoking port. At the same time, the parallel arrangement can also reduce the airflow interference between the two rectifying components. When the two rectifying components are far apart and parallel to each other, the airflow interaction between them is small, so that the independence of each rectifying effect can be maintained.

[0059] Reference Figure 2 and Figure 3 According to one embodiment of the utility model, at least one of the first rectifying component 400 and the second rectifying component 500 is a rectifying net, and the rectifying net includes a net portion 410 and a frame 420. The frame 420 is arranged on the outer peripheral side of the net portion 410, and the frame 420 is connected and fixed to the inner wall of the casing 100.

[0060] It is understandable that in the present embodiment, the first rectifying component 400 and the second rectifying component 500 are both rectifying nets, wherein the net portion 410 of the rectifying net is used to comb the turbulent airflow into a relatively uncluttered flue gas airflow. The net portion 410 is composed of a plurality of meshes, and the airflow can appropriately reduce the flow velocity when passing through these meshes to solve the problem of turbulent flow. The frame 420 of the rectifying net is used to be connected and fixed to the inner wall of the housing 100. The design of the frame 420 should ensure that the rectifying net can be firmly installed inside the housing 100 and can withstand a certain amount of airflow impact.

[0061] Optionally, the connection and fixing method of the frame 420 of the rectifier network and the inner wall of the housing 100 can be selected according to the specific situation. A common fixing method is to use a hook or a buckle to connect and fix the frame 420 to the inner wall of the housing 100. Another way is to use bolts or screws to fix the frame 420 to the inner wall of the housing 100. Regardless of which fixing method is used, the stability and reliability of the rectifier network inside the housing 100 should be ensured.

[0062] Reference Figure 2 and Figure 3 According to an embodiment of the present invention, the first rectifying component 400 is a rectifying net, and a frame 420 is provided on the peripheral side of the first rectifying component 400 away from the main air inlet 210 .

[0063] It is understandable that the first rectifying component 400 is arranged opposite to the main air inlet 210. In order to reduce the influence of the first rectifying component 400 on the airflow at the main air inlet 210, the frame 420 is not arranged on the side of the first rectifying component 400 close to the main air inlet 210. The frame 420 is arranged on the peripheral side of the first rectifying component 400 away from the main air inlet 210, and the frame 420 is connected and fixed to the inner wall of the housing 100, providing a stable support for the first rectifying component 400.

[0064] According to one embodiment of the utility model, the casing 100 includes a front side panel 110 and a rear side panel 120 which are arranged opposite to each other in the front and rear directions, and the fan 200 also includes a secondary air intake port 220 which is opposite to the main air intake port 210. The main air intake port 210 is opposite to the rear side panel 120, and the secondary air intake port 220 is opposite to the front side panel 110. The second rectifying component 500 is connected between the front side panel 110 and the rear side panel 120, and the first rectifying component 400 is connected between the rear side panel 120 and the fan 200.

[0065] It can be understood that the second rectifying component 500 is connected between the front side plate 110 and the rear side plate 120, so that the second rectifying component 500 can cover most of the airflow entering from the main air inlet 210 and the secondary air inlet 220. The main function of the second rectifying component 500 is to perform preliminary rectification on the incoming airflow, reduce turbulence and eddy current phenomena, and improve the uniformity and stability of the airflow.

[0066] The first rectifying component 400 is connected between the rear side plate 120 and the fan 200, especially at a position opposite to the main air intake port 210. Since the main air intake port 210 is mainly used to rectify the oil smoke returning from the top of the housing 100, the main task of the first rectifying component 400 is to finely rectify this part of the airflow. By optimizing the airflow path and reducing turbulence, the first rectifying component 400 can ensure that the airflow enters the fan 200 more smoothly, thereby improving the overall performance of the range hood 10.

[0067] Finally, it should be noted that the above implementation modes are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A range hood, characterized in that: include: A fan, wherein the fan is provided with a main air intake port; A casing, an air flow channel is enclosed between the casing and the fan, and the air flow channel is communicated with the main air inlet; A first rectifying component is arranged in the air flow channel and is arranged corresponding to the main air intake port.

2. The range hood according to claim 1, characterized in that: The first rectifying component is arranged perpendicularly to the plane where the main air inlet is located, and the first rectifying component is arranged perpendicularly on the flow path of the airflow in the airflow channel.

3. The range hood according to claim 2, characterized in that: The first rectifying component is horizontally arranged in the air flow channel and is located above the middle of the air flow channel.

4. The range hood according to claim 3, characterized in that: The first rectifying component is arranged on the axial center plane of the main air intake port.

5. The range hood according to any one of claims 1 to 4, characterized in that: It also includes a second rectifying component, which is arranged in the air flow channel and located below the main air inlet.

6. The range hood according to claim 5, characterized in that: The flow rate of the first rectifying component is smaller than the flow rate of the second rectifying component.

7. The range hood according to claim 5, characterized in that: The first rectifying component and the second rectifying component are arranged parallel to each other.

8. The range hood according to claim 5, characterized in that: At least one of the first rectifying component and the second rectifying component is a rectifying net, and the rectifying net comprises a net portion and a frame, wherein the frame is arranged on the outer peripheral side of the net portion, and the frame is connected and fixed to the inner wall of the casing.

9. The range hood according to claim 8, characterized in that: The first rectifying component is a rectifying net, and the first rectifying component is provided with the frame on the peripheral side away from the main air inlet.

10. The range hood according to claim 5, characterized in that: The casing includes a front side panel and a rear side panel which are arranged opposite to each other in the front and rear directions, and the fan also includes a secondary air intake port which is opposite to the main air intake port, the main air intake port is opposite to the rear side panel, and the secondary air intake port is opposite to the front side panel, the second rectifying component is connected between the front side panel and the rear side panel, and the first rectifying component is connected between the rear side panel and the fan.

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