A range hood

Abstract

The application discloses a kind of range hood. The range hood includes wind box, which is provided with wind cavity inside;Fan, installed in the wind cavity, the fan includes volute and impeller arranged in the volute, the rear side of the volute is provided with air inlet, the upper side of the volute is provided with air outlet;Air guide structure, installed between the rear side of the volute and the rear wall of the wind box, the air guide structure includes support structure and sound-absorbing structure installed on the support structure, the support structure includes support upper plate, support left plate and support right plate, the support upper plate is arranged at the rear of the upper part of the air inlet, the support left plate is arranged at the rear of the left side of the air inlet, the support right plate is arranged at the rear of the right side of the air inlet, the upper part of the support left plate is connected with the left side of the support upper plate, the upper part of the support right plate is connected with the right side of the support upper plate.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] Range hoods are essential kitchen fume purification devices. The volute of the fan assembly, as the core of airflow delivery, directly determines the performance of the range hood due to the flow field state in its surrounding area. Existing range hoods often suffer from inefficient flow fields on the inlet and outlet sides of the volute due to component gaps and lack of airflow guidance. This leads to eddies and turbulence, increasing airflow resistance and resulting in insufficient airflow, as well as generating aerodynamic noise. Therefore, a new type of range hood is urgently needed to solve these problems. Summary of the Invention

[0003] This invention aims to at least partially solve one of the problems existing in the prior art. To this end, this invention proposes a range hood that, by setting an air guide structure between the volute and the rear side wall of the air box, guides the airflow to flow to the air inlet in a concentrated manner, reducing the formation of eddies and turbulence in other parts of the airflow within the air box, thereby reducing the noise generated by eddies and turbulence and achieving a noise reduction effect. At the same time, by setting a sound-absorbing structure on the support structure, the airflow noise can be further reduced, thus achieving a better noise reduction effect.

[0004] The above objectives are achieved through the following technical solutions: A range hood, comprising: A bellows, which contains an air chamber; A fan is installed inside the air cavity. The fan includes a volute and an impeller disposed inside the volute. An air inlet is provided on the rear side of the volute, and an air outlet is provided on the upper side of the volute. An air guide structure is installed between the rear side of the volute and the rear side wall of the air box. The air guide structure includes a support structure and a sound-absorbing structure installed on the support structure. The support structure includes an upper support plate, a left support plate, and a right support plate. The upper support plate is located behind the upper part of the air inlet. The left support plate is located behind the left side of the air inlet. The right support plate is located behind the right side of the air inlet. The upper part of the left support plate is connected to the left side of the upper support plate, and the upper part of the right support plate is connected to the right side of the upper support plate.

[0005] Optionally, the upper support plate is inclined downwards from front to back.

[0006] Optionally, the sound-absorbing structure includes an upper sound-absorbing cotton, a left sound-absorbing cotton, and a right sound-absorbing cotton. The upper sound-absorbing cotton is disposed on the rear side of the upper support plate, the left sound-absorbing cotton is disposed on the left side of the left support plate, and the right sound-absorbing cotton is disposed on the right side of the right support plate.

[0007] Optionally, the upper support plate, the left support plate, and the right support plate are each provided with a plurality of sound-absorbing holes.

[0008] Optionally, both the upper and lower ends of the supporting upper plate are provided with upwardly extending first limiting flanges, and the upper sound-absorbing cotton is engaged between the first limiting flange located at the upper end of the supporting upper plate and the second limiting flange located at the lower end of the supporting upper plate; and / or The front and rear ends of the left support plate are both provided with second limiting flanges extending to the left, and the left sound-absorbing cotton is positioned between the second limiting flange located at the front end of the left support plate and the second limiting flange located at the rear end of the left support plate; and / or The front and rear ends of the right support plate are both provided with a third limiting flange extending to the right, and the right sound-absorbing cotton is inserted between the third limiting flange located at the front end of the right support plate and the third limiting flange located at the rear end of the right support plate.

[0009] Optionally, a fourth limiting flange extending rearward is provided at the rear end of the second limiting flange located at the front end of the left supporting plate and at the rear end of the third limiting flange located at the front end of the right supporting plate. The fourth limiting flange located at the rear end of the second limiting flange abuts against the left side of the left sound-absorbing cotton, and the fourth limiting flange located at the rear end of the third limiting flange abuts against the right side of the right sound-absorbing cotton.

[0010] Optionally, the rear end of the fourth limiting flange is provided with a bending limiting part, which abuts against the rear side of the upper sound-absorbing cotton.

[0011] Optionally, the left support plate is inclined to the left from top to bottom, and the right support plate is inclined to the right from top to bottom.

[0012] Optionally, the left support plate is tangent to the air inlet, and the right support plate is tangent to the air inlet.

[0013] Optionally, the volute includes a volute body and an air outlet located on the upper part of the volute body. The air outlet is opened in the air outlet. The upper end of the upper support plate is located between the air inlet and the upper end of the volute body. The lower end of the upper support plate is located between the horizontal plane where the midpoint of the air inlet is located and the lower end of the air inlet. The lower ends of the left support plate and the right support plate are both located between the lower end of the air inlet and the lower end of the bellows.

[0014] Optionally, the support structure is integrally formed and connected to the rear side of the volute.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The range hood provided by this invention guides the airflow to the air inlet by setting an air guide structure between the volute and the rear side wall of the air box, thereby reducing the formation of eddies and turbulence in other parts of the airflow in the air box, and thus reducing the noise generated by eddies and turbulence, achieving a noise reduction effect. At the same time, by setting a sound-absorbing structure on the support structure, the airflow noise can be further reduced, thereby achieving a better noise reduction effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the range hood provided in a specific embodiment of the present invention; Figure 2 This is an assembly diagram of the air box, fan and air guide structure of the range hood provided in a specific embodiment of the present invention; Figure 3 This is an assembly diagram of the fan and air guide structure of a range hood provided in a specific embodiment of the present invention; Figure 4 yes Figure 3 Exploded view; Figure 5 yes Figure 2 Top view; Figure 6 yes Figure 5 Sectional view at point AA; Figure 7 yes Figure 5 Sectional view at point BB; Figure 8 This is a diagram showing the unbent state of the bending and limiting part in the air guide structure of the range hood provided in a specific embodiment of the present invention.

[0017] In the picture: 1. Fan; 11. Volute; 111. Volute body; 112. Air outlet; 12. Air inlet; 13. Air outlet; 14. Impeller; 2. Air guide structure; 211. Support upper plate; 2111. First limiting flange; 212. Support left plate; 213. Support right plate; 214. Fourth limiting flange; 2141. Bending limiting part; 215. Sound absorption hole; 216. Second limiting flange; 217. Third limiting flange; 221. Upper sound absorption cotton; 222. Left sound absorption cotton; 223. Right sound absorption cotton; 3. Air box; 30. Air cavity. Detailed Implementation

[0018] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0019] Please refer to Figures 1-7 This invention provides a range hood, including a wind box, a fan 1, and an air guide structure 2. The wind box contains an air cavity 30. The fan 1 is installed within the air cavity 30. The fan 1 includes a volute 11 and an impeller 14 disposed within the volute 11. An air inlet 12 is provided on the rear side of the volute 11, and an air outlet 13 is provided on the upper side of the volute 11. The air guide structure 2 is installed between the rear side of the volute 11 and the rear side wall of the air box. The air guide structure 2 includes a support structure and a sound-absorbing structure installed on the support structure. The support structure includes an upper support plate 211, a left support plate 212 and a right support plate 213. The upper support plate 211 is located behind the upper part of the air inlet 12, the left support plate 212 is located behind the left side of the air inlet 12, and the right support plate 213 is located behind the right side of the air inlet 12. The upper part of the left support plate 212 is connected to the left side of the upper support plate 211, and the upper part of the right support plate 213 is connected to the right side of the upper support plate 211.

[0020] The range hood provided by the present invention provides a support structure between the volute 11 and the rear side wall of the air box to guide the airflow to the air inlet 12, thereby reducing the formation of eddies and turbulence in other parts of the airflow in the air box, and thus reducing the noise generated by eddies and turbulence, achieving a noise reduction effect. At the same time, by setting a sound-absorbing structure on the support structure, the airflow noise can be further reduced, thereby achieving a better noise reduction effect.

[0021] Optionally, the upper support plate 211 is inclined downward from front to back to further guide the airflow from bottom to top to the air inlet 12.

[0022] Optionally, the sound-absorbing structure includes an upper sound-absorbing cotton 221, a left sound-absorbing cotton 222, and a right sound-absorbing cotton 223. The upper sound-absorbing cotton 221 is located on the rear side of the upper support plate 211, the left sound-absorbing cotton 222 is located on the left side of the left support plate 212, and the right sound-absorbing cotton 223 is located on the right side of the right support plate 213. This allows the noise generated by the airflow when it passes through the support structure to be absorbed by the upper sound-absorbing cotton 221, the left sound-absorbing cotton 222, and the right sound-absorbing cotton 223, thus achieving a better noise reduction effect.

[0023] Optionally, multiple sound-absorbing holes 215 are provided on the upper support plate 211, the left support plate 212, and the right support plate 213 to facilitate the transmission of noise through the sound-absorbing holes 215 to the sound-absorbing structure, whereby it is absorbed by the sound-absorbing structure.

[0024] Optionally, the upper and lower ends of the support plate 211 are provided with an upwardly extending first limiting flange 2111, and the upper sound-absorbing cotton 221 is engaged between the first limiting flange 2111 located at the upper end of the support plate 211 and the second limiting flange 216 located at the lower end of the support plate 211, thereby realizing the limiting installation of the upper sound-absorbing cotton 221.

[0025] Optionally, the front and rear ends of the left support plate 212 are provided with a second limiting flange 216 extending to the left. The left sound-absorbing cotton 222 is engaged between the second limiting flange 216 located at the front end of the left support plate 212 and the second limiting flange 216 located at the rear end of the left support plate 212, thereby achieving the limiting installation of the left sound-absorbing cotton 222.

[0026] Optionally, the front and rear ends of the right support plate 213 are provided with a third limiting flange 217 extending to the right. The right sound-absorbing cotton 223 is fitted between the third limiting flange 217 located at the front end of the right support plate 213 and the third limiting flange 217 located at the rear end of the right support plate 213, thereby achieving the limiting installation of the right sound-absorbing cotton 223.

[0027] Optionally, a fourth limiting flange 214 extending rearward is provided at the rear end of the second limiting flange 216 located at the front end of the left supporting plate 212 and at the rear end of the third limiting flange 217 located at the front end of the right supporting plate 213. The fourth limiting flange 214 located at the rear end of the second limiting flange 216 abuts against the left side of the left sound-absorbing cotton 222 to further limit the installation position of the left sound-absorbing cotton 222 and improve the installation stability of the left sound-absorbing cotton 222. The fourth limiting flange 214 located at the rear end of the third limiting flange 217 abuts against the right side of the right sound-absorbing cotton 223 to further limit the installation position of the right sound-absorbing cotton 223 and improve the installation stability of the right sound-absorbing cotton 223.

[0028] Optionally, the rear end of the fourth limiting flange 214 is provided with a bending limiting part 2141, which abuts against the rear side of the upper sound-absorbing cotton 221 to further limit the installation position of the upper sound-absorbing cotton 221 and improve the installation stability of the upper sound-absorbing cotton 221.

[0029] Optionally, the left support plate 212 is tilted to the left from top to bottom, and the right support plate 213 is tilted to the right from top to bottom, so as to guide the airflow smoothly to the air inlet 12.

[0030] Optionally, the left support plate 212 is tangent to the air inlet 12, and the right support plate 213 is tangent to the air inlet 12, so as to further guide the airflow to flow smoothly to the air inlet 12 and reduce airflow resistance.

[0031] Optionally, the volute 11 includes a volute body 111 and an air outlet 112 located on the upper part of the volute body 111. The air outlet 13 is opened in the air outlet 112. The upper end of the upper support plate 211 is located between the air inlet 12 and the upper end of the volute body 111 to avoid the upper support plate 211 blocking the air inlet 12 and to ensure the effective air intake space of the air inlet 12. The lower end of the upper support plate 211 is located between the horizontal plane where the midpoint of the air inlet 12 is located and the lower end of the air inlet 12 to achieve effective airflow guidance, reduce the airflow to other positions within the air cavity 30, and also avoid occupying too much space within the air box, which is conducive to product miniaturization. The lower ends of the left support plate 212 and the right support plate 213 are both located between the lower end of the air inlet 12 and the lower end of the air box to achieve effective airflow guidance and reduce the airflow to other positions within the air cavity 30.

[0032] Optionally, the support structure is integrally formed and connected to the rear side of the volute 11.

[0033] Specifically, the support structure is integrally formed by sheet metal bending, which is simple in structure, has good stability, and is easy to manufacture.

[0034] Optionally, the bracket structure is mounted on the rear side of the volute 11 by screws.

[0035] Specifically, the bracket structure is first installed on the rear side of the volute 11 with screws, and then the sound-absorbing structure is installed on the bracket structure.

[0036] The steps for installing the sound-absorbing structure onto the support structure are as follows: S1: Install the upper sound-absorbing cotton 221 on the upper side of the support plate 211 and lock it between the two first limiting flanges 2111; install the left sound-absorbing cotton 222 on the left side of the support plate 212 and lock it between the two second limiting flanges 216 and the corresponding fourth limiting flanges 214; install the right sound-absorbing cotton 223 on the right side of the support plate 213 and open it between the two third limiting flanges 217 and the corresponding fourth limiting flanges 214. S2: Will be as follows Figure 8 The unbent bend limiting part 2141 shown is bent upwards towards the rear side of the sound-absorbing cotton 221, forming a shape as shown. Figure 3 The state shown indicates that the sound-absorbing structure is then installed on the support structure.

[0037] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A range hood, characterized in that, include: A bellows (3) is provided with an air chamber (30) inside it; A fan (1) is installed in the air cavity (30). The fan (1) includes a volute (11) and an impeller (14) disposed in the volute (11). An air inlet (12) is provided on the rear side of the volute (11), and an air outlet (13) is provided on the upper side of the volute (11). An air guide structure (2) is installed between the rear side of the volute (11) and the rear side wall of the air box (3). The air guide structure (2) includes a support structure and a sound-absorbing structure installed on the support structure. The support structure includes an upper support plate (211), a left support plate (212), and a right support plate (213). The upper support plate (211) is located behind the upper part of the air inlet (12). The left support plate (212) is located behind the left side of the air inlet (12). The right support plate (213) is located behind the right side of the air inlet (12). The upper part of the left support plate (212) is connected to the left side of the upper support plate (211). The upper part of the right support plate (213) is connected to the right side of the upper support plate (211).

2. The range hood according to claim 1, characterized in that, The upper support plate (211) is inclined downward from front to back.

3. The range hood according to claim 2, characterized in that, The sound-absorbing structure includes an upper sound-absorbing cotton (221), a left sound-absorbing cotton (222), and a right sound-absorbing cotton (223). The upper sound-absorbing cotton (221) is located on the rear side of the upper support plate (211), the left sound-absorbing cotton (222) is located on the left side of the left support plate (212), and the right sound-absorbing cotton (223) is located on the right side of the right support plate (213).

4. The range hood according to claim 3, characterized in that, Multiple sound-absorbing holes (215) are provided on the upper support plate (211), the left support plate (212), and the right support plate (213).

5. The range hood according to claim 3, characterized in that, The upper and lower ends of the supporting upper plate (211) are both provided with upwardly extending first limiting flanges (2111), and the upper sound-absorbing cotton (221) is engaged between the first limiting flange (2111) located at the upper end of the supporting upper plate (211) and the second limiting flange (2111) located at the lower end of the supporting upper plate (211); and / or The left support plate (212) is provided with a second limiting flange (216) extending to the left at both its front and rear ends. The left sound-absorbing cotton (222) is engaged between the second limiting flange (216) located at the front end of the left support plate (212) and the second limiting flange (216) located at the rear end of the left support plate (212); and / or The front and rear ends of the right support plate (213) are provided with a third limiting flange (217) extending to the right. The right sound-absorbing cotton (223) is positioned between the third limiting flange (217) located at the front end of the right support plate (213) and the third limiting flange (217) located at the rear end of the right support plate (213).

6. The range hood according to claim 5, characterized in that, The rear end of the second limiting flange (216) located at the front end of the left support plate (212) and the rear end of the third limiting flange (217) located at the front end of the right support plate (212) are both provided with a rearwardly extending fourth limiting flange (214). The fourth limiting flange (214) located at the rear end of the second limiting flange (216) abuts against the left side of the left sound-absorbing cotton (222), and the fourth limiting flange (214) located at the rear end of the third limiting flange (217) abuts against the right side of the right sound-absorbing cotton (223).

7. The range hood according to claim 6, characterized in that, The rear end of the fourth limiting flange (214) is provided with a bending limiting part (2141), which abuts against the rear side of the upper sound-absorbing cotton (221).

8. The range hood according to any one of claims 2-7, characterized in that, The left support plate (212) is inclined to the left from top to bottom, and the right support plate (213) is inclined to the right from top to bottom.

9. The range hood according to any one of claims 2-7, characterized in that, The left support plate (212) is tangentially disposed to the air inlet (12), and the right support plate (213) is tangentially disposed to the air inlet (12).

10. The range hood according to any one of claims 2-7, characterized in that, The volute (11) includes a volute body (111) and an air outlet (112) located on the upper part of the volute body (111). The air outlet (13) is opened in the air outlet (112). The upper end of the upper support plate (211) is located between the air inlet (12) and the upper end of the volute body (111). The lower end of the upper support plate (211) is located between the horizontal plane where the midpoint of the air inlet (12) is located and the lower end of the air inlet (12). The lower ends of the left support plate (212) and the right support plate (213) are both located between the lower end of the air inlet (12) and the lower end of the bellows (3).

11. The range hood according to any one of claims 1-7, characterized in that, The support structure is integrally formed and connected to the rear side of the volute (11).

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