Air cabinet structure and range hood

Abstract

The utility model discloses an air cabinet structure and a range hood. The air cabinet structure comprises a volute, a coaming, a front side plate arranged on the front side of the coaming, a rear side plate arranged on the rear side of the coaming, an air cavity defined by the coaming, the front side plate and the rear side plate, and an air outlet formed in one end of the volute. The wind wheel is installed in the volute and comprises an impeller and a middle disc arranged in the middle of the impeller. The volute tongue is arranged on the coaming and located at the air outlet, the volute tongue comprises an air guide panel facing the air outlet, the middle of the air guide panel is concavely arranged in the direction away from the middle of the air outlet, and the middle of the air guide panel is concavely arranged in the direction away from the impeller; the distance T1 between the front end of the air guide panel and the impeller and the distance T1 between the rear end of the air guide panel and the impeller are the minimum distance between the air guide panel and the impeller, and the distance T2 between the part, located over the middle disc, of the air guide panel and the impeller is the maximum distance between the air guide panel and the impeller.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a wind cabinet structure and a range hood. Background Art

[0002] As consumers have higher and higher requirements for the oil fume removal effect of range hoods, various manufacturers have raised the design targets of air volume and static pressure. Using DC motors instead of traditional AC motors has greatly increased the speed of the fan, and the resulting noise problem has become more and more prominent.

[0003] The internal noise of the range hood can be generally divided into two categories: the shell structure vibration noise and aerodynamic noise. The noise sources of the range hood are mainly the motor and the fan, and the fan system mainly includes the wind cabinet structure, so the wind cabinet structure becomes the focus of aerodynamic noise optimization.

[0004] The fan system of existing range hoods mostly adopts forward multi-blade centrifugal impellers. In order to achieve better performance and better smoke extraction effect, double-suction impellers are generally adopted, that is, the impeller is provided with a front impeller, a middle disk, and a rear impeller. The outlet flow rate of the double-suction impeller gradually increases from the front impeller to the middle disk, and then gradually decreases from the middle disk to the rear impeller. The outlet flow rate of the impeller is unevenly distributed along the axial direction of the impeller. The existing volute tongue is a stretching body, and the minimum gap between the impeller and the volute is a fixed value in the axial direction. When the outlet wind speed of the impeller is high and the gap between the impeller and the volute tongue is small, the aerodynamic noise will be large. When the outlet wind speed of the impeller is low, the gap between the impeller and the volute tongue is large, and the air volume is low, which seriously affects the performance of the range hood and leads to poor user experience.

[0005] Therefore, a wind cabinet structure is urgently needed to solve the above problems. Utility Model Content

[0006] The utility model aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the utility model proposes a wind cabinet structure, which can improve the aerodynamic noise in the area near the volute tongue, achieve a better noise reduction effect, and ensure the airflow velocity.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A wind cabinet structure, comprising:

[0009] The volute comprises a panel, a front side panel arranged at the front side of the panel, and a rear side panel arranged at the rear side of the panel, wherein the panel, the front side panel and the rear side panel together form an air cavity and an air outlet arranged at one end of the volute;

[0010] A wind wheel is installed in the volute, and the wind wheel includes an impeller and a center disk arranged in the middle of the impeller;

[0011] A volute tongue is arranged on the enclosure and located at the air outlet, the volute tongue includes an air guide panel arranged toward the air outlet, the middle portion of the air guide panel is recessed in a direction away from the middle portion of the air outlet, the middle portion of the air guide panel is recessed in a direction away from the impeller, and a distance T1 between the front end of the air guide panel and the rear end of the air guide panel and the impeller is the minimum distance between the air guide panel and the impeller, and a distance T2 between the portion of the air guide panel located directly above the middle disk and the impeller is the maximum distance between the air guide panel and the impeller.

[0012] Optionally, the diameter of the impeller is D, 3%D≤T1≤7%D, 3%D≤T2≤7%D.

[0013] Optionally, the air guide panel is an arc surface, the radii of the front and rear ends of the air guide panel are R1, 3%D≤R1≤6%D, and the radius of the portion of the air guide panel located directly above the middle plate is R2, 4%D≤R2≤9%D.

[0014] Optionally, the enclosure includes an enclosure body and a mounting plate arranged at one end of the enclosure body, and the volute tongue also includes a mounting portion arranged on the back side of the wind guide panel, and the mounting portion is mounted on the mounting plate.

[0015] Optionally, the wind guide panel and the enclosure are integrally formed.

[0016] Optionally, the inner side of the enclosure is smoothly connected to the wind guide panel.

[0017] Optionally, the air guide panel is provided with a plurality of air guide grooves extending along the air outlet direction.

[0018] Optionally, the width of the air guide groove is N, the width of the interval between two adjacent air guide grooves is M, 3mm≤N≤15mm, 5mm≤M≤20mm.

[0019] Optionally, the impeller includes a front impeller and a rear impeller, the front impeller is located on the front side of the middle disk, the rear impeller is located on the rear side of the middle disk, the thickness of the front impeller is K1, the thickness of the rear impeller is K2, and K1=3K2.

[0020] Another aspect of the utility model provides a range hood, comprising the above-mentioned wind cabinet structure.

[0021] Compared with the prior art, the utility model has at least the following beneficial effects:

[0022] The utility model provides a wind cabinet structure in which the volute tongue adjusts the gap between the impeller and the volute tongue according to the wind speed distribution at the air outlet, the wind speed at the front end and the rear end of the impeller is the smallest, and the wind speed at the middle disk of the impeller is the largest, and accordingly, a minimum gap T1 is set between the front end and the rear end of the impeller and the volute tongue, and a maximum gap T2 is set between the impeller and the volute tongue at the middle disk position, so as to improve the aerodynamic noise in the area near the volute tongue, achieve a better noise reduction effect, and ensure the airflow velocity at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the wind cabinet structure provided by the first embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the volute tongue of the wind cabinet structure provided in the first embodiment of the utility model;

[0025] Figure 3 It is a side cross-sectional structural schematic diagram of the wind cabinet structure provided by the first embodiment of the utility model;

[0026] Figure 4 It is a three-dimensional structural schematic diagram of the enclosure of the wind cabinet structure provided in the first embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of the main structure of the wind cabinet structure provided in the first embodiment of the utility model;

[0028] Figure 6 This is a three-dimensional structural schematic diagram of the wind cabinet structure provided by the second embodiment of the utility model;

[0029] Figure 7 It is a three-dimensional structural schematic diagram of the enclosing plate and the snail tongue of the wind cabinet structure provided in the second embodiment of the utility model;

[0030] Figure 8 This is a schematic diagram of the main structure of the wind cabinet structure provided in the second embodiment of the utility model;

[0031] Fig. 9 This is a three-dimensional structural schematic diagram of the wind cabinet structure provided by the third embodiment of the utility model;

[0032] Fig.10 This is a three-dimensional structural schematic diagram of the volute tongue of the wind cabinet structure provided in the third embodiment of the present utility model;

[0033] Fig.11 It is a left-side structural schematic diagram of the volute tongue of the wind cabinet structure provided in the third embodiment of the utility model;

[0034] Fig.12 It is a side sectional structural schematic diagram of the wind cabinet structure provided in the third embodiment of the present utility model.

[0035] In the figure:

[0036] 1. volute; 11. enclosure; 111. enclosure body; 112. mounting plate; 113. mounting hole; 12. front side plate; 13. rear side plate;

[0037] 2. Wind wheel; 21. Impeller; 211. Front impeller; 212. Rear impeller; 22. Middle disk;

[0038] 3. snail tongue; 31. air guide panel; 311. air guide slot; 312. slot bottom surface; 32. mounting portion;

[0039] 100. Air outlet. DETAILED DESCRIPTION

[0040] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific implementation methods of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed for protection in the present invention.

[0041] Embodiment 1

[0042] Please refer to Figure 1-Figure 5 The utility model provides a wind cabinet structure, including a volute 1, a wind wheel 2 and a volute tongue 3. The volute 1 includes a panel 11, a front side panel 12 arranged at the front side of the panel 11, and a rear side panel 13 arranged at the rear side of the panel 11. The panel 11, the front side panel 12 and the rear side panel 13 enclose a wind cavity and an air outlet 100 arranged at one end of the volute 1. The wind wheel 2 is installed in the volute 1, and the wind wheel 2 includes an impeller 21 and a middle plate 22 arranged in the middle of the impeller 21. The volute tongue 3 is arranged on the enclosure 11 and located at the air outlet 100. The volute tongue 3 includes an air guide panel 31 arranged toward the air outlet 100. The middle portion of the air guide panel 31 is recessed in a direction away from the middle portion of the air outlet 100. The middle portion of the air guide panel 31 is recessed in a direction away from the impeller 21. In addition, a distance T1 between the front end of the air guide panel 31 and the rear end of the air guide panel 31 and the impeller 21 is the minimum distance between the air guide panel 31 and the impeller 21. A distance T2 between a portion of the air guide panel 31 located directly above the center disk 22 and the impeller 21 is the maximum distance between the air guide panel 31 and the impeller 21.

[0043] In the wind cabinet structure provided by the utility model, the volute tongue 3 adjusts the gap between the impeller 21 and the volute tongue 3 according to the wind speed distribution at the air outlet 100, the wind speed at the front end of the impeller 21 and the rear end of the impeller 21 is the smallest, and the wind speed of the impeller 21 located at the middle disk 22 is the largest. Accordingly, a minimum gap T1 is set between the front end of the impeller 21 and the rear end of the impeller 21 and the volute tongue 3, and a maximum gap T2 is set between the impeller 21 and the volute tongue 3 at the position of the middle disk 22, so as to improve the aerodynamic noise in the area near the volute tongue 3, achieve a better noise reduction effect, and ensure the airflow velocity.

[0044] Optionally, the diameter of the impeller 21 is D, 3%D≤T1≤7%D, 3%D≤T2≤7%D, so as to ensure the air flow velocity and air flow smoothness.

[0045] Illustratively, in this embodiment, T1 is 3%D and T2 is 5%D.

[0046] Optionally, the wind guide panel 31 is an arc surface, and the radii of the front and rear ends of the wind guide panel 31 are R1, 3%D≤R1≤6%D, and the radius of the part of the wind guide panel 31 located directly above the middle plate 22 is R2, 4%D≤R2≤9%D, so as to facilitate the smooth flow of air.

[0047] Exemplarily, in this embodiment, R1=3% xD, R2=6% xD.

[0048] Optionally, the enclosure 11 includes an enclosure body 111 and a mounting plate 112 arranged at one end of the enclosure body 111 , and the volute tongue 3 also includes a mounting portion 32 arranged on the back side of the wind guide panel 31 , and the mounting portion 32 is mounted on the mounting plate 112 .

[0049] Optionally, a plurality of mounting holes 113 are formed on the mounting plate 112 , and the mounting portion 32 is fixed to the mounting holes 113 by screws.

[0050] Optionally, the enclosure body 111 is smoothly connected to the mounting plate 112 to facilitate airflow and reduce noise.

[0051] Embodiment 2

[0052] Please refer to Figure 6-Figure 8 The difference between the second embodiment and the first embodiment is that the wind guide panel 31 and the enclosure 11 are integrally formed, which has a simple structure, good stability, and reduces the installation process.

[0053] Optionally, the inner side of the enclosure 11 is smoothly connected to the wind guide panel 31 to facilitate air flow and reduce noise.

[0054] Embodiment 3

[0055] Please refer to Figure 9-12The difference between the third embodiment and the first embodiment is that a plurality of air guide grooves 311 extending along the air outlet direction are provided on the air guide panel 31, so that the gap between the impeller 21 and the volute tongue 3 changes alternately, and the frequency range of the airflow hitting the volute tongue 3 becomes larger, so that the rotation noise is reduced or even disappears.

[0056] Optionally, the width of the air guide groove 311 is N, the interval width between two adjacent air guide grooves 311 is M, 3mm≤N≤15mm, 5mm≤M≤20mm, so as to better realize air flow diversion.

[0057] Optionally, the bottom surface 312 of the air guide groove 311 is a curved surface to facilitate smooth flow of air.

[0058] Optionally, the radius of the groove bottom surface 312 of the air guide groove 311 is R3, 5%D≤R3≤12%D, so as to further facilitate the smooth flow of airflow.

[0059] Illustratively, in this embodiment, R3=9%D.

[0060] Optionally, the impeller 21 includes a front impeller 211 and a rear impeller 212, the front impeller 211 is located on the front side of the middle disk 22, and the rear impeller 212 is located on the rear side of the middle disk 22, the thickness of the front impeller 211 is K1, and the thickness of the rear impeller 212 is K2, K1=3K2, so as to adjust the air intake at the front and rear ends of the wind wheel 2.

[0061] Another aspect of the utility model provides a range hood, comprising the above-mentioned wind cabinet structure.

[0062] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A wind cabinet structure, characterized in that: include: A volute (1) comprises a panel (11), a front side panel (12) arranged on the front side of the panel (11), and a rear side panel (13) arranged on the rear side of the panel (11), wherein the panel (11), the front side panel (12) and the rear side panel (13) together form an air cavity and an air outlet (100) arranged at one end of the volute (1); A wind wheel (2) is installed in the volute (1), and the wind wheel (2) comprises an impeller (21) and a center plate (22) arranged in the middle of the impeller (21); A volute tongue (3) is arranged on the enclosure (11) and located at the air outlet (100), the volute tongue (3) comprising an air guide panel (31) arranged toward the air outlet (100), the middle portion of the air guide panel (31) being recessed in a direction away from the middle portion of the air outlet (100), the middle portion of the air guide panel (31) being recessed in a direction away from the impeller (21), and the distance T1 between the front end of the air guide panel (31) and the rear end of the air guide panel (31) and the impeller (21) is the minimum distance between the air guide panel (31) and the impeller (21), and the distance T2 between the portion of the air guide panel (31) located directly above the middle plate (22) and the impeller (21) is the maximum distance between the air guide panel (31) and the impeller (21).

2. The wind cabinet structure according to claim 1, characterized in that: The diameter of the impeller (21) is D, 3%D≤T1≤7%D, 3%D≤T2≤7%D.

3. The wind cabinet structure according to claim 2, characterized in that: The wind guide panel (31) is an arc surface, the radii of the front and rear ends of the wind guide panel (31) are R1, 3%D≤R1≤6%D, and the radius of the portion of the wind guide panel (31) located directly above the middle plate (22) is R2, 4%D≤R2≤9%D.

4. The wind cabinet structure according to claim 1, characterized in that: The enclosure (11) comprises an enclosure body (111) and a mounting plate (112) arranged at one end of the enclosure body (111); the volute tongue (3) further comprises a mounting portion (32) arranged on the back side of the wind guide panel (31); the mounting portion (32) is mounted on the mounting plate (112).

5. The wind cabinet structure according to any one of claims 1 to 3, characterized in that: The wind guide panel (31) and the enclosure (11) are integrally formed.

6. The wind cabinet structure according to claim 5, characterized in that: The inner side of the enclosure (11) is smoothly connected to the wind guide panel (31).

7. The wind cabinet structure according to any one of claims 1 to 4, characterized in that: The wind guide panel (31) is provided with a plurality of wind guide grooves (311) extending along the wind outlet direction.

8. The wind cabinet structure according to claim 7, characterized in that: The width of the air guide groove (311) is N, the width of the interval between two adjacent air guide grooves (311) is M, 3mm≤N≤15mm, 5mm≤M≤20mm.

9. The wind cabinet structure according to any one of claims 1 to 4, characterized in that: The impeller (21) comprises a front impeller (211) and a rear impeller (212), wherein the front impeller (211) is located at the front side of the middle disk (22), and the rear impeller (212) is located at the rear side of the middle disk (22), the thickness of the front impeller (211) is K1, and the thickness of the rear impeller (212) is K2, where K1=3K2.

10. A range hood, characterized in that: It comprises the wind cabinet structure described in any one of claims 1 to 9.

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