volute, fan and range hood
By setting baffles on the inner wall of the volute to block dust or oil carried in the airflow, the problem of the sound-absorbing holes being easily blocked is solved, and the volute achieves an effective noise reduction effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QINGDAO HAIER WISDOM KITCHEN APPLIANCE CO LTD
- Filing Date
- 2026-02-28
- Publication Date
- 2026-06-30
AI Technical Summary
The sound-absorbing holes in the volute are easily clogged by dust or oil, which reduces the noise reduction effect.
A baffle is installed on the inner wall of the volute, surrounding the sound-absorbing hole to block dust or oil carried in the airflow, causing it to adhere to the side of the baffle away from the axis of the sound-absorbing hole, thereby preventing the sound-absorbing hole from being blocked.
It effectively prevents the sound-absorbing holes from being blocked by dust or oil, maintains the noise reduction performance of the volute, and improves the noise reduction effect of the volute.
Smart Images
Figure CN122305070A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sound absorption and noise reduction technology, and in particular to a volute, a fan, and a range hood. Background Technology
[0002] When a fan is operating, it generates considerable noise, primarily from the aerodynamic noise of the high-speed rotation of the impeller. To reduce this noise, noise reduction holes and chambers are typically installed on the inner wall of the volute casing. Noise enters the chamber through the holes and is attenuated within it, thus achieving noise reduction. However, dust or oil carried in the airflow can easily clog the noise reduction holes, reducing the noise reduction effect of the volute casing.
[0003] Accordingly, there is a need in the field for a new type of volute, fan, and range hood to solve the above problems. Summary of the Invention
[0004] The main objective of this application is to provide a volute, a fan, and a range hood to solve the problem that the sound absorption holes of the volute are easily blocked in related technologies.
[0005] To achieve the above objectives, embodiments of this application provide a volute, comprising:
[0006] The shell body has a shell cavity for accommodating the impeller. The side wall of the shell body is constructed with interconnected sound-absorbing holes and sound-absorbing cavities. The sound-absorbing holes are connected to the shell cavity, and the sound-absorbing holes and sound-absorbing cavities constitute a sound-absorbing structure. The sound-absorbing structure is used to attenuate or absorb noise of a set frequency.
[0007] A flow deflector is disposed on the side of the sidewall facing the cavity, and the flow deflector surrounds at least a portion of the outside of the sound-absorbing hole.
[0008] In one possible implementation, the baffle includes a baffle plate surrounding a portion of the outer periphery of the sound-absorbing hole; the baffle plate is spaced apart from the hole wall along the radial direction of the sound-absorbing hole.
[0009] In one possible implementation, the projection of the baffle on the sidewall is curved, and the baffle is recessed in a direction away from the axis of the sound-absorbing hole.
[0010] In one possible implementation, the baffles are spaced apart on the outside of the windward end of the sound-absorbing holes.
[0011] In one possible implementation, the baffle is arc-shaped, and the center of the baffle is collinear with the center of the sound-absorbing hole.
[0012] In one possible implementation, the central angle corresponding to the baffle is 90°-180°.
[0013] In one possible implementation, the flow deflector includes a flow deflector ring, the inner cavity of which is connected to the sound-absorbing hole.
[0014] In one possible implementation, the inner wall of the baffle ring is aligned with the inner wall of the sound-absorbing hole along the axial direction of the sound-absorbing hole, and the inner wall of the baffle ring and the inner wall of the sound-absorbing hole are coplanar.
[0015] This application also provides a fan, including: an impeller and the volute casing of the foregoing embodiments; the impeller is disposed inside the volute casing.
[0016] This application also provides a range hood, including: a main housing and a fan as described in the foregoing embodiments; the fan is disposed inside the main housing.
[0017] Those skilled in the art will understand that the volute, fan, and range hood of the embodiments of this application include a volute housing and a baffle. The volute housing has a cavity for accommodating an impeller, and the sidewall of the volute housing has a communicating sound-absorbing hole and a sound-absorbing cavity. The sound-absorbing hole communicates with the cavity, and the sound-absorbing hole and the sound-absorbing cavity constitute a sound-absorbing structure for attenuating or absorbing noise of a set frequency. The baffle is disposed on the side of the sidewall facing the cavity and surrounds at least a portion of the sound-absorbing hole. With the above arrangement, the baffle surrounds at least a portion of the sound-absorbing hole to block part of the airflow flowing towards the sound-absorbing hole along the inner sidewall of the volute housing. Dust or oil carried in this blocked airflow adheres to the side of the baffle away from the axis of the sound-absorbing hole, making it difficult for this dust or oil to flow towards the sound-absorbing hole and preventing the sound-absorbing hole from being blocked. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A schematic diagram of the volute structure provided in the embodiments of this application. Figure 1 ;
[0020] Figure 2 A schematic diagram of the volute structure provided in the embodiments of this application. Figure 2 ;
[0021] Figure 3 for Figure 2 Sectional view along the middle AA direction;
[0022] Figure 4 for Figure 3 A magnified view of a portion of point P1 in the middle;
[0023] Figure 5 This is a schematic diagram of the structure of a volute provided in one embodiment of this application;
[0024] Figure 6 for Figure 5 A magnified view of a portion of point P2 in the middle;
[0025] Figure 7 for Figure 6 Sectional view along the BB direction;
[0026] Figure 8 This is a schematic diagram of the volute structure provided in another embodiment of this application;
[0027] Figure 9 for Figure 8 A magnified view of a portion of point P3 in the middle;
[0028] Figure 10 for Figure 9 A cross-sectional view along the CC direction;
[0029] Figure 11 A schematic diagram of the volute structure provided in the embodiments of this application. Figure 3 ;
[0030] Figure 12 for Figure 11 Sectional view along the DD direction;
[0031] Figure 13 for Figure 12 A magnified view of a portion of P4 in the middle;
[0032] Figure 14 for Figure 11 A sectional view along the EE direction;
[0033] Figure 15 for Figure 14 A magnified view of a portion of P5 in the middle;
[0034] Figure 16 This is a schematic diagram of the structure of the first shell in the volute provided in an embodiment of this application;
[0035] Figure 17 This is a schematic diagram of the structure of the second shell in the volute provided in an embodiment of this application;
[0036] Figure 18 This is a schematic diagram of the exploded structure of a range hood provided in an embodiment of this application;
[0037] Figure 19 This is a schematic diagram of the structure of a range hood provided in an embodiment of this application.
[0038] Explanation of reference numerals in the attached figures:
[0039] 10. Snail shell;
[0040] 110. Inner wall; 111. Sound absorption hole; 112. First inner wall; 113. Second inner wall; 114. Windward end;
[0041] 120. Outer wall; 121. First outer wall; 122. Second outer wall;
[0042] 130. End plate; 131. Sound absorption cavity; 132. First partition plate; 133. Second partition plate;
[0043] 140. Separating component; 141. First chamber; 142. Second chamber; 143. Third chamber; 144. First partition; 145. Second partition; 146. Third partition; 147. Fourth partition; 148. Connecting port;
[0044] 150. First shell;
[0045] 160. Second shell;
[0046] 170. Shell body; 171. Shell cavity;
[0047] 180. Flow deflector;
[0048] 20. Main box;
[0049] 30. Shell;
[0050] 40. Fan;
[0051] 50. Impeller. Detailed Implementation
[0052] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.
[0053] Secondly, it should be noted that in the description of the embodiments of this application, the terms "inner" and "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the described device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.
[0054] Furthermore, it should be noted that, in the description of the embodiments of this application, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0056] As stated in the background section, the volute in the related technology has the problem that the sound absorption holes are easily blocked. The applicant's research found that the reason for this problem is that when the fan is working, the air inside the volute flows rapidly under the action of the impeller, and the airflow often carries dust or oil. As the fan is used for a long time, the dust or oil carried in the airflow can easily adhere to the inner wall of the sound absorption hole, or even block the suction hole, resulting in a decrease in the noise reduction performance of the volute.
[0057] To address the aforementioned technical problems, this application provides a volute, a fan, and a range hood. By providing a baffle on the inner wall of the volute, the baffle surrounds at least a portion of the sound-absorbing hole to block part of the airflow flowing towards the sound-absorbing hole along the inner side wall of the volute body. Dust or oil carried in this blocked airflow adheres to the side of the baffle away from the axis of the sound-absorbing hole, making it difficult for this dust or oil to flow towards the sound-absorbing hole and preventing the sound-absorbing hole from being blocked.
[0058] The principles and features of the embodiments of this application are described below with reference to the accompanying drawings. The examples given are only used to explain the embodiments of this application and are not intended to limit the scope of the embodiments of this application.
[0059] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 This application provides a volute 10, including a shell body 170. The shell body 170 includes an inner sidewall 110, an outer sidewall 120, a plurality of end plates 130, and a plurality of partition components 140. A shell cavity 171 for accommodating an impeller 50 is formed on the inner side of the shell body 170.
[0060] The sidewalls of the shell body 170 include an inner sidewall 110 and an outer sidewall 120. The sidewall of the shell body 170 facing the shell cavity 171 is the side of the inner sidewall 110 facing the shell cavity 171.
[0061] refer to Figure 1 and Figure 4 The inner wall 110 is constructed with multiple sound-absorbing holes 111, which are connected to the shell cavity 171 of the volute 10.
[0062] refer to Figure 3 The outer side wall 120 is located outside the inner side wall 110 and is spaced apart from the inner side wall 110.
[0063] refer to Figure 3 End plates 130 are disposed between the inner sidewall 110 and the outer sidewall 120. Multiple end plates 130 are arranged at intervals along the circumferential direction C of the volute 10, dividing the interval between the inner sidewall 110 and the outer sidewall 120 into multiple sound-absorbing cavities 131. Each sound-absorbing cavity 131 is connected to at least one sound-absorbing hole 111. Noise within the shell cavity 171 of the volute 10 can be transmitted to the sound-absorbing cavity 131 via the sound-absorbing hole 111.
[0064] It should be noted that the reference Figure 3 The circumferential direction C of the volute 10 refers to the circumferential direction along the spiral center line of the volute 10.
[0065] refer to Figure 4 Each sound-absorbing cavity 131 is provided with a partition component 140. The partition component 140 is disposed in the sound-absorbing cavity 131 and divides the sound-absorbing cavity 131 into a first chamber 141, a second chamber 142, and a third chamber 143 that are connected. The first chamber 141 and the second chamber 142 are arranged along the radial direction R of the volute 10, with the first chamber 141 being closer to the inner sidewall 110 than the second chamber 142. The first chamber 141 and the second chamber 142 are both located on the same side of the third chamber 143 along the circumferential direction C of the volute 10. The first chamber 141 and the third chamber 143 are respectively connected to a portion of the sound-absorbing holes 111 and form a sound-absorbing structure, which is used to attenuate or absorb noise of a set frequency.
[0066] The multiple sound-absorbing cavities 131 arranged in a circumferential C-shape of the volute 10 are respectively connected to the corresponding sound-absorbing holes 111, forming multiple sound-absorbing structures arranged in a circumferential C-shape along the volute 10. The multiple sound-absorbing structures can be used to attenuate or absorb noise in different frequency bands.
[0067] The sound-absorbing structure in this embodiment is based on the principle of a Helmholtz resonator. Each sound-absorbing structure has a different inherent frequency band, so that each sound-absorbing structure is used to attenuate or absorb noise of different frequency bands, thereby increasing the range of noise frequency bands that the volute 10 can cover and improving the noise reduction effect of the volute 10.
[0068] The sound-absorbing cavity 131 is filled with air, which can be compressed to store elastic potential energy.
[0069] The air column inside the sound-absorbing hole 111 can reciprocate along the axial direction X of the sound-absorbing hole 111.
[0070] When the noise (sound wave) frequency band of the cavity 171 of the volute 10 is consistent with the inherent frequency band of the sound-absorbing structure, the noise sound wave will drive the air column in the sound-absorbing hole 111 to reciprocate.
[0071] When the air column inside the sound-absorbing hole 111 vibrates, it will repeatedly compress / expand the air inside the sound-absorbing cavity 131. When the air inside the sound-absorbing cavity 131 is compressed, it stores elastic potential energy. When the air inside the sound-absorbing cavity 131 expands, the potential energy is released, which pushes the air column inside the sound-absorbing hole 111 to move in the opposite direction, forming a continuous resonance.
[0072] During the resonance process, the friction between the air column inside the sound-absorbing hole 111 and the hole wall of the sound-absorbing hole 111, as well as the compression loss of the air inside the sound-absorbing cavity 131, will convert the acoustic energy of the target frequency noise into heat energy and consume it, thereby achieving the attenuation or absorption of the noise in that frequency band.
[0073] The sound-absorbing structure achieves precise noise reduction by matching the target noise frequency band through the resonance of the air column in the sound-absorbing cavity 131 and the vibration of the air piston in the sound-absorbing hole 111, without energy consumption and with a simple structure.
[0074] The volute 10 includes multiple sound-absorbing structures with different inherent frequency bands, so that the multiple sound-absorbing structures are used to attenuate or absorb noise of different frequency bands respectively.
[0075] The multiple sound-absorbing structures in the volute 10 can be configured to attenuate or absorb noise in the frequency range of 500Hz-2000Hz. Each sound-absorbing structure is configured to attenuate or absorb noise in a portion of the frequency range of 500Hz-2000Hz, that is, to attenuate or absorb noise in the inherent frequency band.
[0076] The inherent frequency band of a sound-absorbing structure refers to the frequency range of noise that the structure can attenuate or absorb. The inherent frequency band is determined by the structural dimensions of the sound-absorbing structure.
[0077] refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10The volute 10 may also include a flow deflector 180, which is disposed on the side of the inner wall 110 facing the cavity 171. The flow deflector 180 surrounds at least a portion of the outside of the sound-absorbing hole 111 to block part of the airflow flowing along the inner side of the inner wall 110 of the shell body 170 toward the sound-absorbing hole 111. Dust or oil carried in the blocked airflow adheres to the side of the flow deflector 180 away from the axis of the sound-absorbing hole 111, making it difficult for the dust or oil to flow toward the sound-absorbing hole 111 and making it difficult for the sound-absorbing hole 111 to be blocked.
[0078] In some possible implementations of the embodiments of this application, reference is made to Figure 5 , Figure 6 and Figure 7 The baffle 180 may include a baffle plate surrounding a portion of the outer periphery of the sound-absorbing hole 111. One side of the baffle plate faces the axis of the sound-absorbing hole 111, and the other side faces away from the axis of the sound-absorbing hole 111. Along the radial direction of the sound-absorbing hole 111, the baffle plate is spaced apart from the hole wall of the sound-absorbing hole 111.
[0079] The baffle plate surrounds the outside of the sound-absorbing hole 111 to block part of the airflow flowing towards the sound-absorbing hole 111 along the inner side wall 110 of the shell body 170. Dust or oil carried in the blocked airflow adheres to the side of the baffle plate away from the axis of the sound-absorbing hole 111, making it difficult for this part of the dust or oil to flow towards the sound-absorbing hole 111 and making it less likely for the sound-absorbing hole 111 to be blocked.
[0080] In some embodiments, the baffle may be flat.
[0081] In other embodiments, the projection of the baffle on the inner wall 110 is curved, and the baffle is recessed in a direction away from the axis of the sound-absorbing hole 111. Exemplarily, the baffle can be arc-shaped or a curved shape with a certain deformation relative to an arc.
[0082] The curved baffle provides a greater circumferential wrap around the sound-absorbing hole 111, thereby blocking more dust or oil and reducing the possibility of the sound-absorbing hole 111 becoming clogged.
[0083] refer to Figure 5 , Figure 6 and Figure 7 In the implementation of the baffle being arc-shaped, the center of the baffle and the center of the sound-absorbing hole 111 are collinear to improve the concentricity of the baffle and the sound-absorbing hole 111, making the appearance of the volute more regular.
[0084] Of course, the center of the baffle plate can also be non-collinear with the center of the sound-absorbing hole 111, as long as the baffle plate is arranged on the outer periphery of the part surrounding the sound-absorbing hole 111.
[0085] The central angle corresponding to the deflector can be 90°-180°. For example, the central angle corresponding to the deflector can be 90°, 120°, 150°, or 180°, etc. (Refer to...) Figure 7 When the central angle corresponding to the baffle is 180°, it can both improve the degree of the baffle's obstruction of dust or oil and reduce the degree of the baffle's obstruction of noise, so that the noise can enter the sound absorption hole 111 and the sound absorption cavity through the side of the sound absorption hole 111 that is not blocked by the baffle and be absorbed.
[0086] Baffles are spaced apart on the outside of the windward end 114 of the sound-absorbing hole 111. The windward end 114 of the sound-absorbing hole 111 refers to the end of the sound-absorbing hole 111 that first contacts the airflow and sound waves radially. The airflow in the cavity 171 flows from the windward end 114 to the sound-absorbing hole 111. The baffles are positioned at the windward end 114 of the sound-absorbing hole 111 to block dust or oil in the airflow flowing towards the sound-absorbing hole 111, thus preventing dust or oil from clogging the sound-absorbing hole 111.
[0087] In some other possible implementations of the embodiments of this application, reference is made to Figure 8 , Figure 9 and Figure 10 The flow deflector 180 may include a flow deflector ring, the inner cavity of which communicates with the sound absorption hole 111. The flow deflector ring surrounds the entire outer periphery of the sound absorption hole 111 to block the airflow flowing towards the sound absorption hole 111 along the inner side wall of the shell body 170. Dust or oil carried in the blocked airflow adheres to the side of the flow deflector 180 away from the axis of the sound absorption hole 111, making it difficult for this dust or oil to flow towards the sound absorption hole 111 and preventing the sound absorption hole 111 from being blocked.
[0088] The inner wall of the baffle ring is aligned with the inner wall of the sound-absorbing hole 111 along the axial direction of the sound-absorbing hole 111, and the inner wall of the baffle ring is coplanar with the inner wall of the sound-absorbing hole 111, so that the noise in the shell cavity 171 can be more smoothly transferred to the sound-absorbing hole 111 through the inner wall of the baffle ring.
[0089] The volume of each sound-absorbing cavity 131 included in each sound-absorbing structure is different; and / or, the total cross-sectional area of the sound-absorbing holes 111 included in each sound-absorbing structure is different.
[0090] In the implementation of the sound-absorbing structure including multiple sound-absorbing holes 111, the total cross-sectional area of the sound-absorbing holes 111 is the sum of the cross-sectional areas of the multiple sound-absorbing holes 111.
[0091] In some embodiments, the volume of the sound-absorbing cavity 131 included in each sound-absorbing structure is different, and the total cross-sectional area of the sound-absorbing hole 111 included in each sound-absorbing structure can be the same, so that the inherent frequency bands of the sound-absorbing structures are different, thereby enabling multiple sound-absorbing structures to be used to attenuate or absorb noise of different frequency bands respectively.
[0092] In other embodiments, the total cross-sectional area of the sound-absorbing holes 111 included in each sound-absorbing structure is different, and the volume of the sound-absorbing cavity 131 included in each sound-absorbing structure can be the same, so that the inherent frequency bands of each sound-absorbing structure are different, thereby enabling multiple sound-absorbing structures to be used to attenuate or absorb noise of different frequency bands respectively.
[0093] In other embodiments, the volume of the sound-absorbing cavity 131 included in each sound-absorbing structure is different, and the total cross-sectional area of the sound-absorbing hole 111 included in each sound-absorbing structure is different, so that the inherent frequency band of each sound-absorbing structure is different, thereby enabling multiple sound-absorbing structures to attenuate or absorb noise of different frequency bands respectively.
[0094] refer to Figure 4 In this embodiment of the application, the volute 10 has a partition component 140 that divides the sound-absorbing cavity 131 into a first chamber 141, a second chamber 142, and a third chamber 143 that are connected to each other. The first chamber 141 and the second chamber 142 are arranged radially along the volute 10. The first chamber 141 and the second chamber 142 are both located on the same side of the third chamber 143 along the circumferential direction C of the volute 10. The first chamber 141 and the third chamber 143 are respectively connected to a portion of the sound-absorbing holes 111 on the inner sidewall 110 of the volute 10 and form a sound-absorbing structure. The sound-absorbing structure is used to attenuate or absorb noise of a set frequency.
[0095] Noise transmitted from the sound-absorbing hole 111 to the sound-absorbing cavity 131 can propagate in the first cavity 141, the second cavity 142, and the third cavity 143. The arrangement of the first cavity 141, the second cavity 142, and the third cavity 143 increases the reflective surface in the sound-absorbing cavity 131, thereby increasing the number of reflections, the propagation path, and the degree of resonance of the noise in the sound-absorbing cavity 131, and improving the noise reduction effect of the volute 10.
[0096] In some possible implementations of the embodiments of this application, reference is made to Figure 4 The partition assembly 140 may include a first partition 144, a second partition 145, a third partition 146, and a fourth partition 147.
[0097] refer to Figure 4 The first partition 144 and the second partition 145 are both spaced apart from the end plate 130. (Reference) Figure 11 , Figure 12 and Figure 13 The first partition 144 and the second partition 145 are arranged sequentially along the axial direction X of the volute 10. (Reference) Figure 4 The first partition 144 and the second partition 145 are offset from each other circumferentially C along the volute 10. The ends of both the first partition 144 and the second partition 145 near the inner sidewall 110 are connected to the inner sidewall 110. At least one of the first partition 144 and the second partition 145 is spaced apart from the outer sidewall 120. For example, refer to... Figure 4The second partition 145 is spaced apart from the outer wall 120.
[0098] It should be noted that the reference Figure 1 and Figure 12 The axial direction X of the volute 10 is the direction of the rotation center line of the impeller 50 installed inside the volute 10.
[0099] refer to Figure 4 The third partition 146 is disposed between the end plate 130 and the first partition 144. The third partition 146 is connected to the end plate 130 and the first partition 144 at both ends along the circumferential direction C of the volute 10.
[0100] refer to Figure 4 The fourth partition 147 is disposed between the end plate 130 and the second partition 145. The two ends of the fourth partition 147 along the circumferential direction C of the volute 10 are respectively connected to the end plate 130 and the second partition 145. One end of the fourth partition 147 along the axial direction X of the volute 10 is connected to the end of the third partition 146 along the axial direction X.
[0101] The portion of the sound-absorbing cavity 131 located between the third partition 146 and the inner wall 110, and the portion located between the fourth partition 147 and the inner wall 110, constitute the first chamber 141.
[0102] The portion of the sound-absorbing cavity 131 located between the third partition 146 and the outer wall 120, and the portion located between the fourth partition 147 and the outer wall 120, constitute the second chamber 142.
[0103] The portion of the sound-absorbing cavity 131 located on the side of the first partition 144 opposite to the third partition 146, and the portion located on the side of the second partition 145 opposite to the fourth partition 147, constitute the third chamber 143.
[0104] refer to Figure 4 The first partition 144 and the second partition 145 are offset from each other along the circumferential direction C of the volute 10, so that a communication port 148 is formed between the first partition 144 and the second partition 145, and the first chamber 141, the second chamber 142 and the third chamber 143 are connected through the communication port 148.
[0105] The first partition 144 is connected to the inner wall 110 and the outer wall 120 at both ends of the radial direction of the volute 10.
[0106] The radial direction of the volute 10 refers to the direction perpendicular to the center line of the volute 10, and the center line of the volute 10 is along the axial direction X of the volute 10.
[0107] refer to Figure 4The second partition 145 is connected to the inner wall 110 at one end along the radial direction of the volute 10, and the other end is spaced apart from the outer wall 120, so that the second chamber 142 and the third chamber 143 are connected through the gap between the second partition 145 and the outer wall 120.
[0108] In some embodiments, reference Figure 4 The dimension of the third partition 146 along the circumferential direction C of the volute 10 is greater than that of the fourth partition 147 along the circumferential direction C of the volute 10, so that the third partition 146 and the fourth partition 147 are offset along the axial direction X of the volute 10, thereby forming a communication port 148 between the third partition 146 and the fourth partition 147, and the first chamber 141 and the third chamber 143 are connected through the communication port 148.
[0109] In some possible implementations of the embodiments of this application, reference is made to Figure 1 The volute 10 includes a first housing 150 and a second housing 160 that are connected to each other along the axial direction X of the volute 10.
[0110] The inner wall 110 includes a first inner wall 112 and a second inner wall 113, which are connected to each other along the axial direction X.
[0111] The outer wall 120 includes a first outer wall 121 and a second outer wall 122, which are connected to each other along the axial direction X.
[0112] refer to Figure 14 and Figure 15 The end plate 130 includes a first sub-plate 132 and a second sub-plate 133, which are connected to each other along the axial direction X.
[0113] refer to Figure 16 The first housing 150 includes a first inner wall 112, a first outer wall 121, and a first partition plate 132.
[0114] refer to Figure 17 The second housing 160 includes a second inner wall 113, a second outer wall 122, and a second partition plate 133.
[0115] The volute 10 is formed by connecting the first shell 150 and the second shell 160 together along the axial direction X of the volute 10. After separation, the structure of the first shell 150 and the second shell 160 is simplified, the difficulty of processing and manufacturing is reduced, and the processing and manufacturing efficiency of the volute 10 is improved.
[0116] The first housing 150 and the second housing 160 are detachably connected. For example, the first housing 150 and the second housing 160 can be connected by fastening bolts to facilitate cleaning of the inside of the sound-absorbing cavity 131. After the volute 10 has been used for a long time, the first housing 150 and the second housing 160 can be disassembled to clean the inside of the sound-absorbing cavity 131, so that the volute 10 can maintain its sound absorption and noise reduction effect.
[0117] refer to Figure 16 The first housing 150 may include a first partition 144 and a third partition 146. (See reference...) Figure 17 The second housing 160 may include a second partition 145 and a fourth partition 147. After the first housing 150 and the second housing 160 are docked, the third partition 146 and the fourth partition 147 are also docked along the axial direction X of the volute 10, thereby forming a connected first chamber 141, a second chamber 142 and a third chamber 143.
[0118] In some possible implementations of the embodiments of this application, reference is made to Figure 1 , Figure 2 and Figure 15 The outer side wall 120 is stepped on the side facing away from the inner side wall 110. The wall thickness of the outer side wall 120 can be basically the same at each position. Thus, the side of the outer side wall 120 facing the inner side wall 110 is also called stepped. This increases the number of reflective surfaces of the sound absorption cavity 131, thereby increasing the number of reflections, propagation paths and resonance degree of noise in the sound absorption cavity 131, and improving the noise reduction effect of the volute 10.
[0119] refer to Figure 18 This application also provides a fan 40, including an impeller 50 and a volute 10 as described in the previous embodiments. The impeller 50 is disposed inside the volute 10, and the axis of the impeller 50 is aligned with the axis of the volute 10.
[0120] In this embodiment, the fan 40 has a baffle 180 disposed on the inner sidewall 110 of the volute 10 facing the cavity 171. The baffle 180 surrounds at least a portion of the outside of the sound-absorbing hole 111 to block part of the airflow flowing along the inner sidewall 110 of the volute 170 toward the sound-absorbing hole 111. Dust or oil carried in the blocked airflow adheres to the side of the baffle 180 away from the axis of the sound-absorbing hole 111, making it difficult for the dust or oil to flow toward the sound-absorbing hole 111 and making it less likely for the sound-absorbing hole 111 to be blocked.
[0121] The noise generated by the impeller 50 when it rotates is concentrated in the shell cavity 171 of the volute 10, and is transmitted to the sound absorption cavity 131 through the sound absorption hole 111. It then propagates in the first chamber 141, the second chamber 142, and the third chamber 143. The arrangement of the first chamber 141, the second chamber 142, and the third chamber 143 increases the reflective surface in the sound absorption cavity 131, thereby increasing the number of reflections, the propagation path, and the degree of resonance of the noise in the sound absorption cavity 131, and improving the noise reduction effect of the volute 10 and the fan 40.
[0122] The fan 40 in this embodiment includes the volute 10 in the previous embodiments. The specific structure, working principle and function of the volute 10 have been described in detail in the previous embodiments, and will not be repeated here.
[0123] refer to Figure 18 and Figure 19 This application also provides a range hood, including a housing 30, a main housing 20, and a fan 40. The housing 30 is disposed at the bottom of the main housing 20. The fan 40 is disposed inside the main housing 20.
[0124] The outer casing 30 has a smoke inlet that connects to the inner cavity of the main casing 20. When the fan 40 is turned on, fumes and other gases in the kitchen enter the inner cavity of the main casing 20 through the smoke inlet and are then exhausted to the public flue or outdoor environment by the fan 40, thereby improving the air quality in the kitchen.
[0125] In this embodiment of the range hood, the baffle 180 is disposed on the side of the inner wall 110 of the volute 10 facing the cavity 171. The baffle 180 surrounds at least a portion of the outside of the sound absorption hole 111 to block part of the airflow flowing towards the sound absorption hole 111 along the inner side of the inner wall 110 of the volute 170. The oil and other substances carried in the blocked airflow adhere to the side of the baffle 180 away from the axis of the sound absorption hole 111, making it difficult for this part of the oil to flow towards the sound absorption hole 111 and making it difficult for the sound absorption hole 111 to be blocked.
[0126] When the fan 40 is working, the noise generated by the rotation of the impeller 50 is concentrated in the shell cavity 171 of the volute 10, and transmitted to the sound absorption cavity 131 through the sound absorption hole 111. It then propagates in the first chamber 141, the second chamber 142, and the third chamber 143. The arrangement of the first chamber 141, the second chamber 142, and the third chamber 143 increases the reflective surface in the sound absorption cavity 131, thereby increasing the number of reflections, the propagation path, and the degree of resonance of the noise in the sound absorption cavity 131, and improving the noise reduction effect of the volute 10, the fan 40, and the range hood.
[0127] The range hood in this embodiment includes the volute 10 from the previous embodiments. The specific structure, working principle, and function of the volute 10 have been described in detail in the previous embodiments and will not be repeated here.
[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A volute, characterized in that, include: The shell body (170) has a shell cavity (171) for accommodating the impeller (50). The side wall of the shell body (170) is constructed with a sound-absorbing hole (111) and a sound-absorbing cavity (131) that are connected. The sound-absorbing hole (111) is connected to the shell cavity (171). The sound-absorbing hole (111) and the sound-absorbing cavity (131) constitute a sound-absorbing structure. The sound-absorbing structure is used to attenuate or absorb noise of a set frequency. A flow deflector (180) is disposed on the side of the sidewall facing the cavity (171), and the flow deflector (180) surrounds at least a portion of the exterior of the sound-absorbing hole (111).
2. The volute according to claim 1, characterized in that, The baffle (180) includes a baffle plate surrounding a portion of the outer periphery of the sound-absorbing hole (111); the baffle plate is spaced apart from the hole wall of the sound-absorbing hole (111) along the radial direction of the sound-absorbing hole (111).
3. The volute according to claim 2, characterized in that, The projection of the baffle on the side wall is curved, and the baffle is recessed in a direction away from the axis of the sound-absorbing hole (111).
4. The volute according to claim 3, characterized in that, The baffle is arc-shaped, and the center of the baffle is collinear with the center of the sound-absorbing hole (111).
5. The volute according to claim 4, characterized in that, The central angle corresponding to the baffle is 90°-180°.
6. The volute according to claim 2, characterized in that, The baffles are spaced apart outside the windward end (114) of the sound-absorbing hole (111).
7. The volute according to any one of claims 1-6, characterized in that, The flow deflector (180) includes a flow deflector ring, the inner cavity of which is connected to the sound-absorbing hole (111).
8. The volute according to claim 7, characterized in that, The inner wall of the baffle ring is aligned with the inner wall of the sound-absorbing hole (111) along the axial direction of the sound-absorbing hole (111), and the inner wall of the baffle ring is coplanar with the inner wall of the sound-absorbing hole (111).
9. A fan, characterized in that, include: The impeller (50) and the volute (10) according to any one of claims 1-8; the impeller (50) is disposed within the volute (10).
10. A range hood, characterized in that, include: The main housing (20) and the fan (40) as described in claim 9; the fan (40) is disposed inside the main housing (20).