Flue assembly and range hood

Abstract

The flue assembly is provided with a flow guide flue, the flow guide flue is used for communicating with a smoke collecting cavity of the extractor hood and a fan cavity of the extractor hood, the flue assembly comprises a flue shell and a rectifying part, and the rectifying part is arranged in the flue shell and connected with the inner wall of the flue shell; the rectifying part at least forms a first flow guide section, or the rectifying part and the flue shell at least jointly form the first flow guide section; the flow guide flue comprises a first flow guide section and a second flow guide section, the flow guide section further comprises a second flow guide section, or the flow guide section and the flue shell jointly form the second flow guide section, or the section, not provided with the flow guide part, of the flue shell is the second flow guide section, and the flow guide flue comprises the first flow guide section and the second flow guide section which are communicated; and the flow area of the first flow guide section is larger than that of the second flow guide section. According to the technical scheme, the noise generated in the operation process of the range hood can be reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a flue assembly and a range hood using the flue assembly. Background Art

[0002] A range hood is an appliance installed above a kitchen stove. It can quickly extract the waste from stove combustion and the fumes that are harmful to the human body generated during cooking and discharge them outdoors to purify the kitchen environment. However, the range hoods in the related art generate too much noise during operation, resulting in a poor user experience when using the range hoods. Utility Model Content

[0003] The embodiments of the present application provide a flue assembly and a range hood, which can reduce the noise generated during the operation of the range hood and improve the user experience.

[0004] In a first aspect, an embodiment of the present application provides a flue assembly, which is suitable for a range hood and has a guide flue, wherein the guide flue is used to communicate with a smoke collecting chamber of the range hood and a fan chamber of the range hood, and the flue assembly includes a flue shell and a rectifying member;

[0005] The rectifying member is arranged inside the flue shell and connected to the inner wall of the flue shell, and the rectifying member at least forms a first flow guide section, or the rectifying member and the flue shell at least jointly form a first flow guide section; the rectifying member also forms a second flow guide section, or the rectifying member and the flue shell jointly form a second flow guide section, or a section of the flue shell not provided with the rectifying member is the second flow guide section;

[0006] Wherein, the guide flue comprises the first guide section and the second guide section, the first guide section is connected to the second guide section, and the flow area of ​​the first guide section is larger than the flow area of ​​the second guide section.

[0007] In some of the embodiments, the fairing is arranged on the inner wall of the flue shell, or the fairing is arranged on a part of the inner wall of the flue shell.

[0008] In some embodiments, the fairing includes a plurality of fairings, and along the circumference of the flue shell, the inner wall of the flue shell has a plurality of inner wall surfaces connected in sequence;

[0009] Wherein, each of the inner wall surfaces is provided with the rectifying component.

[0010] In some embodiments, the first flow guiding sections include two, one of the two first flow guiding sections is an inlet section, and the other is an outlet section; the second flow guiding section is an intermediate section;

[0011] The inlet section is used to communicate with the smoke collecting chamber and the middle section, and the outlet section is communicated with the middle section and is used to communicate with the fan chamber.

[0012] In some embodiments, along the direction from the middle section to the inlet section, the inlet section is flared; and / or,

[0013] Along the direction from the middle section to the outflow section, the outflow section is arranged in a flared manner.

[0014] In some embodiments, when projected along the front-rear direction of the range hood, the inner wall surface of the inlet section has a first contour line, and the inner wall surface of the outlet section has a second contour line;

[0015] Wherein, the angle between the first contour line and the center line of the smoke guide duct is greater than the angle between the second contour line and the center line of the smoke guide duct.

[0016] In some embodiments, a guide slope is formed on a surface of the rectifying member facing the smoke collecting chamber. The guide slope is arranged facing the smoke collecting chamber and is used to guide the smoke in the inlet section to the outlet section.

[0017] In some embodiments, the cross-section of the fairing parallel to the center line of the flue gas guide is trapezoidal, triangular or arched.

[0018] In some embodiments, the flue gas duct satisfies at least one of the following conditions:

[0019] The wall surface of the inlet section and the wall surface of the middle section are smoothly transitioned;

[0020] The wall surface of the middle section and the wall surface of the outflow section are smoothly transitioned;

[0021] The middle section is extended along the height direction of the range hood.

[0022] In some embodiments, the fairing includes a silencer for reducing noise flowing through the guide flue.

[0023] In some embodiments, the sound-absorbing member includes sound-absorbing cotton; and / or,

[0024] The silencer comprises a perforated plate portion and a silencer portion, and the silencer portion is sandwiched between the perforated plate portion and the inner wall of the flue shell.

[0025] In some embodiments, a surface of the muffler facing away from the inner wall of the flue shell has a recess.

[0026] In some embodiments, the recessed portions include a plurality of recessed portions, and the plurality of recessed portions are arranged at intervals in a direction from the first guide section to the second guide section.

[0027] In some embodiments, the shape of the recess includes at least one of a polygon, a circle, and an ellipse.

[0028] In a second aspect, an embodiment of the present application provides a range hood, the range hood comprising a range hood body and a smoke collecting body, the range hood body comprising the flue assembly and the fan assembly as described above, the fan assembly being connected to the flue shell and having a fan cavity communicating with the guide flue;

[0029] The smoke collecting body is connected to the flue shell and has a smoke collecting cavity communicated with the guide flue.

[0030] Based on the flue assembly and range hood of the embodiment of the present application, by setting the flow area of ​​the first guide section to be larger than the flow area of ​​the second guide section, such a setting, on the one hand, makes it difficult for the first guide section and the second guide section to form resonance, reduces the probability of superposition of noise located in the first guide section and noise located in the second guide section, and is beneficial to reducing the intensity of the noise; at the same time, the first guide section is formed as a region with larger impedance, and the second guide section is formed as a region with smaller impedance, so that the noise is hindered in the process of propagating from the first guide section to the second guide section, or from the second guide section to the first guide section, and can effectively consume the energy of the noise, thereby helping to weaken the energy of the noise and reduce the noise of the entire range hood.

[0031] On the other hand, based on the form in which the first guide section is connected to the smoke collecting chamber, the first guide section with a larger flow area can increase the flow area of ​​the smoke flow guide flue 12B, so that the flue assembly has a better smoke gathering effect and improves the smoke exhaust efficiency; and based on the form in which the first guide section is connected to the fan chamber, the first guide section with a larger flow area can appropriately reduce the flow rate of the oil smoke, which helps to reduce the impact intensity of the oil smoke with too fast a flow rate on the fan, thereby effectively reducing the noise of the entire range hood.

[0032] Moreover, based on the fact that the rectifying component is arranged on the inner wall of the flue shell and the rectifying component can construct the first guide section, in the actual manufacturing process, the two components of the flue shell and the rectifying component can be manufactured and formed separately, and then the two can be assembled. This facilitates the manufacturing of the flue shell and the rectifying component, and at the same time avoids the overly complicated shape of the flue shell caused by constructing the guide flue by the flue shell itself, making the design of the flue shell simpler, so that the shape of the flue shell can be designed to be more regular. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0034] Figure 1 This is a schematic structural diagram of an embodiment of a range hood of the present application;

[0035] Figure 2 for Figure 1 A schematic diagram of the structure of the central range hood when it is in working state;

[0036] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the mid-range hood;

[0037] Figure 4 A cross-sectional schematic diagram of an embodiment of the range hood of the present application;

[0038] Figure 5 It is a longitudinal cross-sectional schematic diagram of multiple embodiments of the flue assembly of the present application;

[0039] Figure 6 A longitudinal cross-sectional schematic diagram of an embodiment of a flue assembly of the present application;

[0040] Figure 7 A cross-sectional schematic diagram of another embodiment of the flue assembly of the present application;

[0041] Figure 8 A cross-sectional schematic diagram of another embodiment of the flue assembly of the present application;

[0042] Fig. 9 It is a longitudinal cross-sectional schematic diagram of multiple embodiments of the flue assembly of the present application;

[0043] Fig.10 It is a longitudinal cross-sectional schematic diagram of multiple embodiments of the flue assembly of the present application;

[0044] Fig.11 It is a schematic longitudinal section diagram of multiple embodiments of the smoke guide duct of the present application;

[0045] Fig.12 This is a cross-sectional schematic diagram of another embodiment of the flue assembly of the present application.

[0046] Description of Figure Numbers:

[0047] 1. Range hood; 10. Hood body; 11. Fan assembly; 111. Fan box; 111A. Fan cavity; 112. Fan; 12. Flue assembly; 12A. Smoke exhaust channel; 12B. Guide flue; 12C. First guide section; 12D. Second guide section; 12E. Inlet section; 12F. Middle section; 12G. Outlet section; 121. Flue shell; 1211. Lifting shell; 1212. Fixed shell; 122. Rectifier; 1221. Guide slope; 123. Silencer; 1231. Silencer cotton; 1232. Orifice plate; 1233. Silencer; 1234. Concave; 14. Lifting drive assembly; 20. Smoke collector body; 20A. Smoke collector cavity; 20B. Smoke outlet.

[0048] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0050] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0051] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0053] Please refer to Figure 1-Figure 2The embodiment of the present application proposes a range hood 1, which is usually installed above a kitchen stove and can quickly extract waste burned by the stove and fumes harmful to the human body generated during cooking, and discharge them outdoors to purify the kitchen environment.

[0054] Among them, the range hood 1 can be divided into multiple types, common types include top-suction range hoods, side-suction range hoods and cross-over range hoods, and this embodiment does not specifically limit the type of the range hood 1.

[0055] It is understandable that the top suction range hood is also commonly known as the European-style range hood, which is usually installed above the ceiling of the kitchen and sucks the fumes upwards through the suction force of the top. Compared with the top suction range hood, the side suction range hood is closer to the stove and can suck the fumes from the side in time during the cooking process, thereby more effectively preventing the fumes from escaping and also improving the efficiency of absorbing fumes. The crossover range hood is a top-side suction combined range hood, which combines the advantages of top suction and side suction, and can absorb fumes from the side and top at the same time, with a higher efficiency of absorbing fumes.

[0056] Please refer to Figure 1-Figure 3 In some embodiments, the range hood 1 includes a range hood body 10 and a smoke collecting body 20, the range hood body 10 includes a flue assembly 12 and a fan assembly 11, and the flue assembly 12 is connected between the fan assembly 11 and the smoke collecting body 20. The smoke collecting body 20 has a smoke collecting chamber 20A and a smoke inlet 20B connected to the smoke collecting chamber 20A. The fan assembly 11 may include a fan box 111 and a fan 112, the fan box 111 has a fan chamber 111A, and the fan 112 is arranged in the fan chamber 111A, so that the exhaust efficiency of oil smoke can be improved through the operation of the fan 112. It can be understood that the smoke collecting chamber 20A, the interior of the flue assembly 12 and the fan chamber 111A are connected in sequence, so that the smoke sucked from the smoke inlet 20B can flow through the smoke collecting chamber 20A, the interior of the flue assembly 12 and the fan chamber 111A in sequence and then flow out to the outside.

[0057] The range hood 1 in the related art generates too much noise during operation, which results in a poor user experience when using the range hood 1. Figure 4-Figure 5 Specifically, the flue assembly 12 includes a flue shell 121 and a fairing 122. It can be understood that the flue assembly 12 has a smoke exhaust channel 12A, and the smoke exhaust channel 12A is connected to the smoke collecting chamber 20A and the fan chamber 111A.

[0058] The flue shell 121 can be in the shape of a rectangular parallelepiped, a cube, etc., and the material of the flue shell 121 can be selected as a metal material, so that the flue shell 121 has the advantages of better strength, better corrosion resistance and higher finish. Of course, the material of the flue shell 121 can also be selected as a plastic material. This embodiment does not specifically limit the shape and material of the flue shell 121. The flue shell 121 is connected to the fan assembly 11 and the smoke collecting body 20, and the interior of the flue shell 121 forms a smoke exhaust channel 12A.

[0059] The rectifying member 122 may include at least one of a muffler 123, a metal member, and a plastic member, and this embodiment does not limit this. It is understandable that the rectifying member 122 itself can play the role of rectifying and guiding the flow of smoke, that is, rectifying and guiding the smoke flowing from the manifold to the smoke exhaust channel 12A, and guiding it to the fan chamber 111A, so that the probability of vortex generated when the smoke flows through the inside of the flue assembly 12 can be reduced, so as to reduce the flow loss of the smoke, improve the smoking efficiency, and effectively reduce the noise generated when the smoke flows. The rectifying member 122 is arranged inside the flue shell 121 (that is, arranged in the smoke exhaust channel 12A), and the rectifying member 122 is connected to the inner wall of the flue shell 121. It is understandable that on the basis that the flue shell 121 is made of a rigid material such as metal, the rectifying member 122 can be relatively stably installed on the flue shell 121, ensuring the stability of the connection and also ensuring the safety of the user when using the range hood 1.

[0060] The smoke exhaust passage 12A includes a smoke guide passage 12B, and the smoke guide passage 12B includes a first guide section 12C and a second guide section 12D that are connected. It can be understood that in one form, the smoke collecting chamber 20A is connected to the first guide section 12C, and the second guide section 12D is connected to the fan chamber 111A; in another form, the smoke collecting chamber 20A is connected to the second guide section 12D, and the first guide section 12C is connected to the fan chamber 111A.

[0061] Specifically, the flow straightener 122 at least forms a first flow guide section 12C, or the flow straightener 122 and the flue shell 121 at least jointly form the first flow guide section 12C; the flow straightener 122 also forms a second flow guide section 12D, or the flow straightener 122 and the flue shell 121 jointly form the second flow guide section 12D, or a section of the flue shell 121 where the flow straightener 122 is not provided is the second flow guide section 12D. It is understandable that the first flow guide section 12C and the second flow guide section 12D may be formed in any of the following forms:

[0062] First: Please refer to Figure 5 In FIG. a, the fairing 122 forms a first guide section 12C, and the fairing 122 also forms a second guide section 12D;

[0063] Second: Please refer to Figure 5 In the figure b, the rectifying member 122 forms a first flow guide section 12C, and a section of the flue shell 121 where the rectifying member 122 is not provided forms a second flow guide section 12D;

[0064] The third type: please refer to Figure 5 In Figure c, the rectifying member 122 forms a first flow guide section 12C, and the rectifying member 122 and the flue shell 121 together form a second flow guide section 12D;

[0065] Fourth: Please refer to Figure 5 In Figure d, the rectifying member 122 and the flue shell 121 together form a first flow guide section 12C, and the rectifying member 122 forms a second flow guide section 12D;

[0066] Fifth: Please refer to Figure 5 In Figure e, the rectifying member 122 and the flue shell 121 together form a first flow guide section 12C, and a section of the flue shell 121 where the rectifying member 122 is not provided forms a second flow guide section 12D;

[0067] Sixth: Please refer to Figure 5 As shown in FIG. f, the rectifying member 122 and the flue shell 121 together form a first flow guide section 12C, and the rectifying member 122 and the flue shell 121 together form a second flow guide section 12D.

[0068] In order to reduce the noise generated by the flue assembly 12 during the operation of the range hood 1, the flow area of ​​the first guide section 12C is set to be larger than the flow area of ​​the second guide section 12D in this embodiment. This setting, on the one hand, makes it difficult for the first guide section 12C and the second guide section 12D to form resonance, reduces the probability of the noise located in the first guide section 12C and the noise located in the second guide section 12D being superimposed, and is beneficial to reducing the intensity of the noise; at the same time, the first guide section 12C is formed into a region with larger impedance, and the second guide section 12D is formed into a region with smaller impedance, so that the noise is hindered in the process of propagating from the first guide section 12C to the second guide section 12D, or from the second guide section 12D to the first guide section 12C, and can effectively consume the energy of the noise, thereby helping to weaken the energy of the noise and reduce the noise of the entire range hood 1.

[0069] On the other hand, based on the form in which the first guide section 12C is connected to the smoke collecting chamber 20A, the first guide section 12C with a larger flow area can increase the flow area of ​​the smoke flowing into the guide flue 12B, so that the flue assembly 12 has a better smoke gathering effect and improves the smoke exhaust efficiency; and based on the form in which the first guide section 12C is connected to the fan chamber 111A, the first guide section 12C with a larger flow area can reduce the flow rate of the oil smoke, which helps to reduce the impact intensity of the oil smoke on the fan 112, thereby effectively reducing the noise of the entire range hood 1.

[0070] It is worth mentioning that, based on the fact that the rectifying member 122 is arranged on the inner wall of the flue shell 121 and the rectifying member 122 can construct the form of the first guide section 12C, in the actual manufacturing process, the two components of the flue shell 121 and the rectifying member 122 can be manufactured and formed separately, and then the two can be assembled. This facilitates the manufacturing and production of the flue shell 121 and the rectifying member 122, and at the same time avoids the shape of the flue shell 121 being too complicated due to the separate construction of the guide flue 12B by the flue shell 121 itself, making the design of the flue shell 121 simpler, so that the shape of the flue shell 121 can be designed to be more regular.

[0071] See also Figure 3 In some embodiments, the flue shell 121 includes a fixed shell 1212 and a lifting shell 1211 sleeved on the fixed shell 1212. The fixed shell 1212 is fixedly connected to the fan box 111, and a first smoke guide channel connected to the fan chamber 111A is formed inside. The lifting shell 1211 is fixedly connected to the smoke collecting body 20, and a second smoke guide channel connected to the smoke collecting chamber 20A is formed inside. The first smoke guide channel is connected to the second smoke guide channel, and cooperates to construct a guide smoke duct 12B, and the rectifying component 122 is arranged in the first smoke guide channel.

[0072] The range hood 1 further includes a lifting drive assembly 14, which is mounted on the fan box 111 and is in transmission connection with the lifting shell 1211, so as to drive the lifting shell 1211 to move relative to the fixed shell 1212. In this way, when the range hood 1 is working, the lifting drive assembly 14 can drive the lifting shell 1211 to descend, and can make the smoke collecting body 20 located below the user's breathing area, so as to avoid the smoke collecting body 20 being higher than the user's breathing area and causing the user to inhale oil smoke, and at the same time, it can also reduce the diffusion path of oil smoke and improve the situation of oil smoke escape. After the range hood 1 has finished absorbing oil smoke, the lifting drive assembly 14 can drive the lifting shell 1211 to rise, so that when the range hood 1 is not in working state, the smoke collecting body 20 does not occupy too much space under the kitchen cabinet.

[0073] See also Figure 4In some embodiments, the flow rectifying member 122 includes a muffler 123, and the muffler 123 is used to reduce the noise flowing through the flue gas guide 12B. In this way, the muffler 123 can be used to further reduce the noise, thereby further reducing the noise generated by the range hood 1 during operation.

[0074] See also Figure 4 Furthermore, the silencer 123 includes silencer cotton 1231 , and the silencer cotton 1231 can be attached to the inner wall of the flue shell 121 .

[0075] It is understandable that the fluffy porous structure in the muffler cotton 1231 can effectively absorb the noise generated by the smoke, and the muffler cotton 1231 has good elasticity and is not easily damaged even when subjected to a large external force. In addition, the reduced weight of the muffler cotton 1231 is conducive to reducing the overall weight of the flue assembly 12.

[0076] See also Figure 4 Optionally, the muffler 123 includes a perforated plate portion 1232 and a muffler portion 1233. The perforated plate portion 1232 has a plurality of sound-absorbing holes, and the specific size and arrangement of the plurality of sound-absorbing holes can allow noise of certain frequency bands to enter the muffler portion 1233 in a targeted manner. For example, a smaller aperture can generally absorb noise with a higher frequency, while a larger aperture can absorb noise with a lower frequency. The muffler portion 1233 can be a muffler cotton 1231, or can be a mixture of the muffler cotton 1231 and a fiber cloth, and this embodiment does not limit this.

[0077] It is understandable that the orifice plate portion 1232 can filter out noise of a specific frequency, and enable the muffler portion 1233 to reduce the noise of the specific frequency. For example, high-frequency noise is relatively sharp and harsh to human hearing. Therefore, based on the screening of the orifice plate portion 1232, the muffler portion 1233 can specifically reduce high-frequency noise to prevent the range hood 1 from generating sharp and harsh noise during operation. In this way, the muffler portion 1233 does not need to absorb noise of all frequency bands, and can reduce noise of some frequencies that have a greater impact on human hearing. Therefore, the muffler portion 1233 does not need to use a more complex structure and material, which is conducive to reducing the cost of the muffler 123.

[0078] See also Figure 6In some embodiments, the surface of the muffler 123 facing away from the inner wall of the flue shell 121 has a recess 1234. The shape of the recess 1234 may include at least one of a polygon, a circle, and an ellipse, so that the shape of the recess 1234 is relatively regular, avoiding flow loss when the smoke flows through the recess 1234, so as to ensure the smoke exhaust efficiency of the range hood 1, and also avoiding the generation of eddy currents and noise when the smoke flows through the recess 1234. The number of the recess 1234 may be one or more, and the number and shape of the recess 1234 are not limited in this embodiment.

[0079] It is understandable that this embodiment can utilize the recess 1234 to increase the contact area between the noise and the silencer 123, which is beneficial to increase the volume of noise entering the silencer 1233, thereby further improving the noise reduction effect of the silencer 1233 on noise.

[0080] Please continue reading Figure 6 Furthermore, the recesses 1234 include a plurality of recesses 1234, and in the direction from the first guide section 12C to the second guide section 12D, the plurality of recesses 1234 are arranged at intervals. This arrangement can further increase the contact area between the noise and the silencer 123 through the plurality of recesses 1234, which is beneficial to increase the volume of noise entering the silencer 1233, thereby further improving the noise reduction effect of the silencer 1233 on noise.

[0081] Please refer to Figure 5 and Figure 7 In some embodiments, the flow straightener 122 is arranged in a ring on the inner wall of the flue shell 121. It is understandable that the flow straightener 122 can be arranged in a ring shape and arranged on the inner wall of the flue shell 121, so that the first flow guide section 12C can be directly constructed by using the flow straightener 122, and in some forms, the second flow guide section 12D can also be directly constructed by using the flow straightener 122. Based on this embodiment, the first flow guide section 12C and the second flow guide section 12D can be constructed in any of the following forms:

[0082] First: Please refer to Figure 5 Figure a in Figure 7 , the fairing 122 forms a first guide section 12C, and the fairing 122 also forms a second guide section 12D;

[0083] Second: Please refer to Figure 5 Figure b and Figure 7 The rectifying member 122 forms a first guide section 12C, and a section of the flue shell 121 where the rectifying member 122 is not provided forms a second guide section 12D;

[0084] The third type: please refer to Figure 5 The c graph in Figure 7The rectifying member 122 forms a first flow guide section 12C, and the rectifying member 122 and the flue shell 121 together form a second flow guide section 12D.

[0085] Thus, by the annular arrangement of the rectifying member 122, on the one hand, when the smoke flows through the guide flue 12B, it can be rectified and guided by the rectifying member 122, thereby further reducing the overall flow loss of the smoke, improving the smoking efficiency, and effectively reducing the noise generated when the smoke flows. On the other hand, a single rectifying member 122 can be arranged on the inner wall of the flue shell 121, with fewer assembly steps, and the annular rectifying member 122 has a more regular structure, which is convenient for manufacturing and production.

[0086] Please refer to Figure 5 and Figure 8 In some embodiments, the flow straightener 122 is disposed on a portion of the inner wall of the flue shell 121. It is understandable that the inner wall of the flue shell 121 is partially covered by the flow straightener 122, so the flue shell 121 and the flow straightener 122 can at least jointly construct a first flow guide section 12C, and in some forms, the flow straightener 122 and the flue shell 121 can also be further used to jointly construct a second flow guide section 12D. Based on this embodiment, the first flow guide section 12C and the second flow guide section 12D can be constructed in any of the following forms:

[0087] First: Please refer to Figure 5 The e graph in Figure 8 The rectifying member 122 and the flue shell 121 together form a first flow guide section 12C, and a section of the flue shell 121 where the rectifying member 122 is not provided forms a second flow guide section 12D;

[0088] Second: Please refer to Figure 5 The f graph in Figure 8 The flow straightening member 122 and the flue shell 121 together form a first flow guiding section 12C, and the flow straightening member 122 and the flue shell 121 together form a second flow guiding section 12D.

[0089] In this way, the first guide section 12C can be constructed through the cooperation of the rectifying component 122 and the flue shell 121 to reduce the material usage of the rectifying component 122, which is beneficial to reducing production costs. Moreover, the rectifying component 122 can be flexibly set at a specific position in the flue shell 121 according to the actual required rectifying and guiding effects, which makes operation more convenient.

[0090] Exemplarily, the flue shell 121 is arranged in a square shape and includes four shell side walls connected in sequence. The number of the fairings 122 can be one or more. When the number is one, the fairing 122 can be arranged on any one of the four shell side walls. When the number is more than one, at least two of the four shell side walls are provided with the fairing 122. For example, the number of the fairings 122 is two, and the two fairings 122 are arranged on two opposite shell side walls.

[0091] See also Figure 4 Further, the flow-rectifying member 122 includes a plurality of flow-rectifying members 122, which are arranged at intervals along the circumference of the flue shell 121. Among them, along the circumference of the flue shell 121, the inner wall of the flue shell 121 has a plurality of inner wall surfaces connected in sequence, and each inner wall surface is provided with a flow-rectifying member 122. For example, the flue shell 121 is arranged in a square shape and includes four shell side walls connected in sequence, and the flow-rectifying member 122 includes four flow-rectifying members 122, which are arranged on the four side shell walls in a one-to-one correspondence.

[0092] In this way, at least part of the smoke flowing through different inner wall surfaces of the flue shell 121 can be rectified and guided by the rectifying member 122, thereby further reducing the overall flow loss of the smoke, improving the smoking efficiency, and effectively reducing the noise generated by the flow of the smoke.

[0093] See also Figure 4 In some embodiments, the first flow guide section 12C includes two, and one of the two first flow guide sections 12C is an inlet section 12E, and the other is an outlet section 12G. The second flow guide section 12D is a middle section 12F. It can be understood that the flow area of ​​the inlet section 12E and the flow area of ​​the outlet section 12G are both greater than the flow area of ​​the middle section 12F.

[0094] The inlet section 12E is connected to the smoke collecting chamber 20A and to the middle section 12F, and the outlet section 12G is connected to the middle section 12F and to the fan chamber 111A. In this way, the smoke will first flow from the smoke collecting chamber 20A into the inlet section 12E, then flow from the inlet section 12E to the middle section 12F, then flow from the middle section 12F to the outlet section 12G, and finally flow from the outlet section 12G to the fan chamber 111A.

[0095] On the one hand, the present embodiment can make it difficult for resonance to form between the inlet section 12E, the middle section 12F and the outlet section 12G, thereby reducing the probability of superposition of the noise located in the inlet section 12E, the noise located in the middle section 12F and the noise located in the outlet section 12G, and reducing the intensity of the noise; at the same time, compared with the inlet section 12E and the outlet section 12G, the middle section 12F will form a region with larger impedance, so that the noise is hindered in the process of propagation, and the energy of the noise can be effectively consumed, thereby helping to weaken the energy of the noise and reduce the noise of the entire range hood 1.

[0096] On the other hand, compared with the middle section 12F, the inlet section 12E with a larger flow area can increase the flow area of ​​the smoke flow guide flue 12B, so that the flue assembly 12 has a better smoke gathering effect and improves the smoke exhaust efficiency, while the outlet section 12G with a larger flow area can appropriately reduce the flow rate of the oil smoke, which helps to reduce the impact intensity of the oil smoke on the fan 112, thereby effectively reducing the noise of the entire range hood 1.

[0097] Please refer to Figure 9-10 Based on this embodiment, the inlet section 12E, the middle section 12F and the outlet section 12G may be structured in any of the following forms:

[0098] First: Please refer to Fig. 9 In Figure a, the fairing 122 forms a middle section 12F, and the fairing 122 also forms an inlet section 12E and an outlet section 12G;

[0099] Second: Please refer to Fig. 9 In the figure b, the rectifying member 122 forms a middle section 12F, and a section of the flue shell 121 not provided with the rectifying member 122 forms an inlet section 12E and an outlet section 12G;

[0100] The third type: please refer to Fig. 9 In Figure c, the rectifying member 122 forms a middle section 12F, and the rectifying member 122 and the flue shell 121 together form an inlet section 12E and an outlet section 12G;

[0101] Fourth: Please refer to Fig. 9 In the figure d, the rectifying member 122 forms a middle section 12F, the rectifying member 122 and the flue shell 121 together form an inlet section 12E, and a section of the flue shell 121 not provided with the rectifying member 122 forms an outlet section 12G;

[0102] Fifth: Please refer to Fig. 9 In Figure e, the rectifying member 122 forms a middle section 12F, the rectifying member 122 and the flue shell 121 together form an outflow section 12G, and a section of the flue shell 121 not provided with the rectifying member 122 forms an inflow section 12E;

[0103] Sixth: Please refer to Fig.10 In Figure a, the rectifying member 122 and the flue shell 121 together form a middle section 12F, and the rectifying member 122 forms an inlet section 12E and an outlet section 12G;

[0104] Seventh: Please refer to Fig.10 In the figure b, the rectifying member 122 and the flue shell 121 together form a middle section 12F, and a section of the flue shell 121 where the rectifying member 122 is not provided forms an inlet section 12E and an outlet section 12G;

[0105] Eighth: Please refer to Fig.10 In Figure c, the rectifying member 122 and the flue shell 121 jointly form a middle section 12F, and the rectifying member 122 and the flue shell 121 jointly form an inlet section 12E and an outlet section 12G;

[0106] Ninth: Please refer to Fig.10 In the figure d, the rectifying member 122 and the flue shell 121 jointly form a middle section 12F, the rectifying member 122 and the flue shell 121 jointly form an inlet flow section 12E, and a section of the flue shell 121 where the rectifying member 122 is not provided forms an outlet flow section 12G;

[0107] 10th: Please refer to Fig.10 As shown in Figure e, the rectifying member 122 and the flue shell 121 jointly form a middle section 12F, the rectifying member 122 and the flue shell 121 jointly form an outflow section 12G, and a section of the flue shell 121 where the rectifying member 122 is not provided forms an inflow section 12E.

[0108] See also Fig.11 In some embodiments, the inlet section 12E is expanded along the direction of the middle section 12F pointing to the inlet section 12E. Such a configuration can increase the smoke collection range of the inlet section 12E to better collect the smoke, thereby further improving the smoke exhaust efficiency of the range hood 1.

[0109] See also Fig.11 In some embodiments, the outlet section 12G is expanded along the direction of the middle section 12F pointing to the outlet section 12G. Such a configuration can further increase the outlet area of ​​the outlet section 12G to further reduce the flow rate of the oil smoke, which helps to reduce the impact intensity of the oil smoke on the fan 112, thereby further reducing the noise of the entire range hood 1.

[0110] See also Fig.11 In some embodiments, the inlet section 12E is configured to be expanded along the direction from the middle section 12F to the inlet section 12E. This configuration can increase the range of smoke collection by the inlet section 12E to better collect the smoke, thereby further improving the smoke exhaust efficiency of the range hood 1. In addition, the outlet section 12G is configured to be expanded along the direction from the middle section 12F to the outlet section 12G. This configuration can further increase the outlet area of ​​the outlet section 12G to further reduce the flow rate of the oil smoke, thereby helping to reduce the impact strength of the oil smoke on the fan 112, thereby further reducing the noise of the range hood 1.

[0111] See also Fig.12In some embodiments, when projected along the front-rear direction of the range hood 1, the inner wall surface of the inlet section 12E has a first contour line, and the inner wall surface of the outlet section 12G has a second contour line. The angle between the first contour line and the center line of the guide flue 12B is greater than the angle between the second contour line and the center line of the guide flue 12B.

[0112] In this way, the expansion degree of the inlet section 12E will be greater than that of the outlet section 12G, which not only ensures that the inlet section 12E has a larger smoke gathering range and the smoke gathering effect, but also makes the outlet of the outlet section 12G smaller, thereby increasing the difficulty of noise propagating from the outlet section 12G to the fan 112 section, and allowing the noise to be retained in the outlet section 12G as much as possible to achieve a noise reduction effect.

[0113] See also Fig.11 In some embodiments, the cross-section of the rectifying member 122 parallel to the center line of the flue gas guide 12B is in a trapezoidal, triangular or arched shape. Such a configuration makes the rectifying member 122 more regular in shape, avoids flow loss when the flue gas flows through the rectifying member 122, thereby ensuring the exhaust efficiency of the range hood 1, and avoids eddy currents and noise when the flue gas flows through the rectifying member 122.

[0114] It can be understood that, based on the longer height of the flue assembly 12, the cross-sectional shape of the rectifying member 122 can be adaptively selected as a trapezoid or an arch with a smaller degree of arching, and based on the shorter height of the flue assembly 12, the cross-sectional shape of the rectifying member 122 can be adaptively selected as a triangle or an arch with a larger degree of arching.

[0115] See also Fig.11 In some embodiments, the flue gas duct 12B satisfies at least one of the following conditions:

[0116] The wall surface of the inlet section 12E and the wall surface of the middle section 12F are smoothly transitioned. In this way, not only can the smoke avoid flow loss when flowing through the connection between the inlet section 12E and the middle section 12F, but also make the smoke flow smoother, thereby improving the smoke exhaust efficiency of the range hood 1, but also can avoid smoke eddy flow, and reduce the probability of noise generated when the smoke flows through the connection.

[0117] The wall surface of the middle section 12F and the wall surface of the outflow section 12G are smoothly transitioned. In this way, not only can the smoke avoid flow loss when flowing through the connection between the middle section 12F and the outflow section 12G, but also make the smoke flow smoother, thereby improving the smoke exhaust efficiency of the range hood 1, but also can avoid smoke eddy flow, and reduce the probability of noise generated when the smoke flows through the connection.

[0118] The middle section 12F is extended along the height direction of the range hood 1. In this way, the resistance of the smoke flowing in the middle section 12F can be reduced, the smoke can be more effectively rectified, and the smoke can be prevented from generating eddy currents in the middle section 12F and making noise.

[0119] See also Figure 4 In some embodiments, a surface of the rectifying member 122 facing the smoke collecting chamber 20A is formed with a guide slope 1221, wherein the guide slope 1221 may be a curved surface or a flat surface.

[0120] The guide slope 1221 is arranged facing the smoke collecting chamber 20A, and is used to guide the smoke located in the inlet section 12E to the outlet section 12G. Based on the setting of the guide slope 1221, the smoke can be prevented from touching sharp points when flowing through the side of the rectifying member 122 toward the smoke collecting chamber 20A, thereby helping to reduce the impact loss of the smoke, making the smoke flow smoother, thereby improving the smoke exhaust efficiency of the range hood 1, and at the same time, it can also prevent the smoke from touching sharp points and generating noise, thereby ensuring the noise reduction effect of the range hood 1.

[0121] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0122] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A flue assembly, characterized in that: Applicable to a range hood, having a guide flue, the guide flue is used to communicate with the smoke collecting chamber of the range hood and the fan chamber of the range hood, the flue assembly includes: Flue casing; and A flow-rectifying member is arranged inside the flue shell and connected to the inner wall of the flue shell, wherein the flow-rectifying member at least forms a first flow-guiding section, or the flow-rectifying member and the flue shell at least form a first flow-guiding section together; the flow-rectifying member further forms a second flow-guiding section, or the flow-rectifying member and the flue shell form a second flow-guiding section together, or a section of the flue shell where the flow-rectifying member is not provided is the second flow-guiding section; Wherein, the guide flue comprises the first guide section and the second guide section, the first guide section is connected to the second guide section, and the flow area of ​​the first guide section is larger than the flow area of ​​the second guide section.

2. The flue assembly according to claim 1, characterized in that The rectifying member is arranged on the inner wall of the flue shell in a ring shape, or the rectifying member is arranged on a part of the inner wall of the flue shell.

3. The flue assembly according to claim 2, characterized in that The rectifying member comprises a plurality of members, and along the circumference of the flue shell, the inner wall of the flue shell has a plurality of inner wall surfaces connected in sequence; Wherein, each of the inner wall surfaces is provided with the rectifying component.

4. The flue assembly according to claim 2, characterized in that The first flow guide sections include two, one of which is an inlet section and the other is an outlet section; the second flow guide section is an intermediate section; The inlet section is used to communicate with the smoke collecting chamber and the middle section, and the outlet section is communicated with the middle section and is used to communicate with the fan chamber.

5. The flue assembly according to claim 4, characterized in that Along the direction from the middle section to the inlet section, the inlet section is flared; and / or, Along the direction from the middle section to the outflow section, the outflow section is arranged in a flared manner.

6. The flue assembly according to claim 5, characterized in that Projected along the front-to-back direction of the range hood, the inner wall surface of the inlet section has a first contour line, and the inner wall surface of the outlet section has a second contour line; Wherein, the angle between the first contour line and the center line of the smoke guide duct is greater than the angle between the second contour line and the center line of the smoke guide duct.

7. The flue assembly according to claim 4, characterized in that A guide slope is formed on the surface of the rectifying member facing the smoke collecting chamber. The guide slope is arranged facing the smoke collecting chamber and is used to guide the smoke in the inlet section to the outlet section.

8. The flue assembly according to claim 4, characterized in that The cross-sectional shape of the rectifying member parallel to the center line of the guide flue is trapezoidal, triangular or arched.

9. The flue assembly according to claim 4, characterized in that The flue gas duct meets at least one of the following conditions: The wall surface of the inlet section and the wall surface of the middle section are smoothly transitioned; The wall surface of the middle section and the wall surface of the outflow section are smoothly transitioned; The middle section is extended along the height direction of the range hood.

10. The flue assembly according to any one of claims 1 to 9, characterized in that: The rectifying member includes a silencer, and the silencer is used to reduce the noise flowing through the guide flue.

11. The flue assembly according to claim 10, characterized in that The sound-absorbing member includes sound-absorbing cotton; and / or, The silencer comprises a perforated plate portion and a silencer portion, and the silencer portion is sandwiched between the perforated plate portion and the inner wall of the flue shell.

12. The flue assembly according to claim 10, characterized in that The surface of the muffler facing away from the inner wall of the flue shell has a recess.

13. The flue assembly according to claim 12, characterized in that The recesses include a plurality of recesses, and the plurality of recesses are arranged at intervals in a direction from the first guide section to the second guide section.

14. The flue assembly according to claim 12, characterized in that The shape of the concave portion includes at least one of a polygon, a circle, and an ellipse.

15. A range hood, characterized in that: include: A range hood body, comprising a flue assembly and a fan assembly as claimed in any one of claims 1 to 14, wherein the fan assembly is connected to the flue shell and has a fan cavity communicated with the guide flue; as well as The smoke collecting body is connected to the flue shell and has a smoke collecting cavity communicated with the guide flue.

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