Fan system and range hood comprising same

Abstract

The utility model provides a fan system and a range hood comprising the same, the fan system comprises a fan frame and a fan, the fan comprises a volute, the fan frame comprises a volute-shaped accommodating cavity, the accommodating cavity is used for supporting the volute, and the volute is flexibly connected with the fan frame through a damping piece. The fan frame is provided with the volute-shaped containing cavity so that the volute can be contained and supported conveniently, the volute is flexibly connected with the fan frame through the damping piece, vibration caused by direct hard contact of the volute and the fan frame can be reduced, and vibration transmission between the volute and the fan frame can also be reduced.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to a fan system and an oil fume hood comprising the same. Background Art

[0002] Range hoods operate based on the principles of fluid dynamics. A centrifugal fan installed inside the range hood draws in and exhausts oil fumes, while a filter removes some grease particles. A centrifugal fan consists of a volute, an impeller mounted within the volute, and a motor that drives the impeller. As the impeller rotates, negative pressure is generated at the fan's center, drawing the fumes from beneath the range hood into the fan. After being accelerated by the fan, they are collected by the volute and directed out of the room.

[0003] The primary source of noise in range hoods is the fan system. In current range hoods, the fan system consists of a motor bracket mounted on one side of the volute, a motor mounted on the bracket, an impeller mounted on the motor, and an air inlet ring mounted on the other side of the volute. The pre-assembled motor bracket, motor, impeller, and air inlet ring are directly connected to the fan frame. The impeller and motor are then connected to the volute, which in turn is connected to the fan frame. The vibrations caused by rotation are transmitted to the volute. Most volutes have weak structural strength, which amplifies the vibrations and transmits them to the fan frame, where they are amplified again, causing vibration throughout the unit.

[0004] In addition, the volute is installed in the fan frame, and the thickness of the volute generally occupies more than 50% of the depth of the fan frame, and is close to 60%. The range hood collects the oil smoke and then flows into the fan frame. In a relatively small space, the smoke flow space is sharply reduced by nearly 50% at the connection between the smoke hood and the fan frame, causing huge flow losses, a significant decrease in flow efficiency, a decrease in air volume, and an increase in noise. To address this issue, existing products have an air guide plate at the bottom of the fan volute. The air guide plate is an integral part of the front and rear side plates of the fan volute, or the air guide plate is a separate part. However, the volute enclosure, fan frame, and air guide plate form a relatively closed space, which occupies a large amount of flow space. The flow space is convex and concave, and there is no gradual process, which causes flow losses and greatly weakens the diversion effect brought by the air guide plate. Moreover, due to the height limitation of the fan frame and volute, there is not much space left for the air guide plate, which will cause the air flow angle to be too small, causing the air flow angle to deviate significantly from the fan inlet side; at the same time, in the smaller space of the fan frame, the lateral space for the flue gas flow will also be reduced, making the air flow time longer and the aerodynamic noise increased. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a fan system and a range hood comprising the same.

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] A fan system comprises: a fan frame; a fan, wherein the fan comprises a volute; the fan frame comprises a volute-shaped accommodating cavity, the accommodating cavity is used to support the volute, and the volute is flexibly connected to the fan frame via a shock-absorbing member.

[0008] In this solution, the wind frame is provided with a volute-shaped accommodating cavity to accommodate and support the volute. The volute is flexibly connected to the wind frame through a shock-absorbing member, which can reduce the vibration caused by direct hard contact between the volute and the wind frame, and can also reduce the vibration transmission between the volute and the wind frame.

[0009] Preferably, the shock-absorbing member includes a first shock-absorbing pad and a second shock-absorbing pad, the first shock-absorbing pad is arranged on the volute, and the second shock-absorbing pad is arranged on the fan frame.

[0010] In this solution, shock-absorbing pads are respectively provided on the volute and the wind frame to achieve a flexible connection between the volute and the wind frame, and the first shock-absorbing pad and the second shock-absorbing pad can be partially compressed so that the volute is fastened in the accommodating cavity of the wind frame.

[0011] Preferably, the fan rack includes two fan frame groups, and the two fan frame groups are docked and connected. The fan system also includes a motor bracket, a motor, an impeller and an air inlet ring. The motor bracket is connected to one of the fan frame groups, the motor is connected to the motor bracket, the impeller is connected to the motor, and the air inlet ring is connected to the other fan frame group.

[0012] In this solution, the fan frame is arranged in the form of two fan frame groups docked and connected to facilitate the installation of the volute, the motor bracket, motor, and impeller are arranged on one of the fan frame groups, and the air inlet ring is arranged on the other fan frame group, so that the motor bracket, motor, impeller and air inlet ring are no longer directly installed on the volute, avoiding the combined vibration from being directly transmitted to the volute through the motor bracket, and avoiding vibration transmission and energy amplification caused by resonance.

[0013] Preferably, the fan frame group includes an outer frame, a top panel assembly, a side panel assembly and a surrounding panel assembly, the outer frame includes two symmetrically arranged first vertical panels, and a second vertical panel connected to the outside of the two first vertical panels, the side panel assembly and the surrounding panel assembly are arranged in the outer frame, the top panel assembly is arranged in the upper part of the outer frame, one end of the side panel assembly is connected in the first vertical panel, and the other end of the side panel assembly is connected to the other first vertical panel, the side panel assembly is parallel to the second vertical panel and has a gap, and the side panel assembly is provided with an air inlet, and the top panel assembly, the side panel assembly and the surrounding panel assembly enclose the accommodating cavity.

[0014] In this solution, the installation of the volute and the impeller is achieved through the specific structural setting of the fan frame. The outer frame includes two symmetrically arranged first vertical plates, and a second vertical plate connected to the outside of the two first vertical plates. When the two fan frame groups are docked, the outer frames on the two fan frame groups are arranged to form a closed cavity around the outside. On the one hand, the volute and impeller and other components are placed in the internal space to avoid exposure. On the other hand, it can receive the airflow from the smoke hood and guide it into the volute. Specifically, the side panel assembly is parallel to the second vertical plate and has a gap, and the side panel assembly is provided with an air inlet, so that an air duct is formed between the side panel assembly and the second vertical plate, so that the airflow enters the volute through the air inlet. The top panel assembly, the side panel assembly and the surrounding panel assembly enclose the accommodating cavity to accommodate the volute.

[0015] Preferably, a connecting flange is provided at a position where the two fan frame assemblies are connected to each other, and the two fan frame assemblies are connected by the connecting flange.

[0016] In this solution, the fan frame group is connected and fixed by connecting flanges, which has a simple structure and is firmly installed.

[0017] Preferably, the volute includes a volute enclosure and a volute side plate, and the lower portion of the volute side plate has an inclined portion that is inclined inward.

[0018] In this solution, the lower portion of the volute side plate has an inclined inward-slanting sloped portion, which can reduce the space occupied by the bottom of the volute, thereby releasing more flow channel space.

[0019] Preferably, the fan frame assembly further includes a guide plate frame, which is arranged in the peripheral frame and connected to the lower end of the side plate assembly, and the guide plate frame includes a planar portion and a curved portion connected to the lower end of the planar portion.

[0020] In this solution, a guide plate frame is provided in the fan frame group. After the two fan frames are docked, the guide plate frames on the two fan frame groups form an air guide structure. The air guide component is provided as a combination of a flat surface and a curved surface, which releases a large amount of flow channel space, ensuring that the airflow has sufficient transition space during the process of being guided by the air guide structure, so that the airflow has a gradual process when flowing through the air guide component. The airflow first passes through the curved surface and then transitions to the flat surface. The gradual process can reduce flow loss and improve the air guide effect of the air guide component.

[0021] Preferably, the planar portion is parallel to the inclined portion of the volute side plate, the size of the planar portion is not smaller than the size of the inclined portion, and the curved portion is located below the volute.

[0022] In this solution, the planar portion of the guide plate frame is parallel to the inclined portion of the volute side plate, making the structure more compact and more fitted when the volute is connected to the fan frame assembly, reducing the generation of vibration, and the size of the planar portion is not less than the size of the inclined portion, and the curved portion is located below the volute, so that the air guide component can release more flow space below the volute, so that the space passed by the air guide component from the starting position of the guide to the ending position of the guide is significantly larger, and the airflow has sufficient space and time for compression, and the turning angle of the airflow is significantly reduced when entering the air intake channels on both sides, reducing flow losses and improving flow efficiency.

[0023] Preferably, the first shock-absorbing pad is fixed on the enclosure of the volute, and the second shock-absorbing pad is fixed on the side plate components of the two fan frame groups.

[0024] In this solution, the first shock-absorbing pad is further fixed to the enclosure of the volute, and the second shock-absorbing pad is fixed to the side panel assemblies of the two fan frame groups, so that the entire volute and the two fan frame groups are separated by the first shock-absorbing pad and the second shock-absorbing pad, without any rigid direct connection, and the cooperation of the first shock-absorbing pad and the second shock-absorbing pad enables the volute to be fastened in the wind frame.

[0025] The utility model also provides a range hood, comprising the fan system as described above.

[0026] The positive progressive effect of the present invention is that the fan frame is provided with a volute-shaped accommodating cavity to accommodate and support the volute, and the volute is flexibly connected to the fan frame through a shock-absorbing member, which can reduce the vibration caused by direct hard contact between the volute and the fan frame, and can also avoid the vibration transmission between the volute and the fan frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a range hood according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of a range hood according to one embodiment of the present invention from one direction.

[0029] Figure 3 for Figure 2 Cross-sectional view along the AA direction.

[0030] Figure 4 for Figure 2 Cross-sectional view along direction BB.

[0031] Figure 5 for Figure 2 Cross-sectional view along CC direction.

[0032] Figure 6 This is a structural schematic diagram of a fan frame assembly according to an embodiment of the present invention.

[0033] Figure 7 This is a structural diagram of a volute according to an embodiment of the present invention.

[0034] Figure 8 This is a bottom view of a volute according to an embodiment of the present invention.

[0035] Description of Reference Numerals

[0036] Wind rack 1

[0037] Fan 2

[0038] Accommodation chamber 3

[0039] Volute 4

[0040] First shock-absorbing pad 5

[0041] Second shock-absorbing pad 6

[0042] Fan frame group 7

[0043] Motor bracket 8

[0044] Motor 9

[0045] Impeller 10

[0046] Air inlet ring 11

[0047] Peripheral frame 12

[0048] Top plate assembly 13

[0049] Side panel assembly 14

[0050] Panel assembly 15

[0051] Guide frame 16

[0052] First riser 17

[0053] Second vertical plate 18

[0054] Connecting flange 19

[0055] Volute enclosure 20

[0056] Volute side plate 21

[0057] Bevel part 22

[0058] Flat surface portion 23

[0059] Curved surface 24

[0060] Range hood 25

[0061] Fume hood 26

[0062] Outlet 27

[0063] External air inlet 28 DETAILED DESCRIPTION

[0064] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0065] like Figures 1-6 As shown, the present invention provides a fan system comprising: a fan frame 1; a fan 2, wherein the fan 2 includes a volute 4; the fan frame 1 includes a volute 4-shaped receiving chamber 3, which is used to support the volute 4, and the volute 4 is flexibly connected to the fan frame 1 via a shock-absorbing member. The fan frame 1 is provided with a volute-shaped receiving chamber to accommodate and support the volute, and the volute is flexibly connected to the fan frame 1 via the shock-absorbing member, which can reduce vibration caused by direct hard contact between the volute 4 and the fan frame 1, and can also reduce vibration transmission between the volute 4 and the fan frame 1.

[0066] like Figure 3 As shown, the shock-absorbing member includes a first shock-absorbing pad 5 and a second shock-absorbing pad 6. The first shock-absorbing pad 5 is provided on the volute 4, and the second shock-absorbing pad 6 is provided on the wind rack 1. The shock-absorbing pads are provided on the volute 4 and the wind rack 1, respectively, to achieve a flexible connection between the volute 4 and the wind rack 1. The first shock-absorbing pad 5 and the second shock-absorbing pad 6 can be partially compressed, so that the volute 4 is fastened within the accommodating chamber 3 of the wind rack 1.

[0067] like Figure 1-5 As shown, the fan frame 1 includes two fan frame groups 7, and the two fan frame groups 7 are butt-connected. The fan system also includes a motor bracket 8, a motor 9, an impeller 10 and an air inlet ring 11. The motor bracket 8 is connected to one of the fan frame groups 7, the motor 9 is connected to the motor bracket 8, the impeller 10 is connected to the motor 9, and the air inlet ring 11 is connected to the other fan frame group 7. Setting the fan frame 1 in the form of butt-connected two fan frame groups 7 facilitates the installation of the volute 4. The motor bracket 8, motor 9, and impeller 10 are set on one of the fan frame groups 7, and the air inlet ring is set on the other fan frame group 7, so that the motor bracket 8, motor 9, impeller 10 and air inlet ring 11 are no longer directly mounted on the volute 4, thereby avoiding the combined vibration from being directly transmitted to the volute 4 through the motor bracket 8, and avoiding vibration transmission and energy amplification caused by resonance, etc.

[0068] like Figure 7As shown, the fan frame group 7 includes an outer frame 12, a top plate assembly 13, a side plate assembly 14 and a surrounding plate assembly 15. The outer frame 12 includes two symmetrically arranged first vertical plates 17, and a second vertical plate 18 connected to the outside of the two first vertical plates 17. The side plate assembly 14 and the surrounding plate assembly 15 are arranged in the outer frame 12, and the top plate assembly 13 is arranged in the upper part of the outer frame 12. The top plate assembly 13 is also provided with an outgoing air outlet 27 corresponding to the air outlet of the volute 4. One end of the side plate assembly 14 is connected to the first vertical plate 17, and the other end of the side plate assembly 14 is connected to the other first vertical plate 17. The side plate assembly 14 is parallel to the second vertical plate 18 and has a gap, and the side plate assembly 14 is provided with an outgoing air inlet 28 corresponding to the air inlet of the volute 4. The top plate assembly 13, the side plate assembly 14 and the surrounding plate assembly 15 enclose a accommodating chamber 3. The installation of the volute 4 and the impeller 10 is achieved through the specific structural setting of the fan frame group 7. The outer frame 12 includes two symmetrically arranged first vertical plates 17 and a second vertical plate 18 connected to the outside of the two first vertical plates 17. When the two fan frame groups 7 are docked, the outer frames 12 on the two fan frame groups 7 are arranged to form a closed cavity around the outside. On the one hand, the volute 4 and the impeller 10 and other components are placed in the internal space to avoid exposure. On the other hand, it can receive the airflow from the smoke hood 26 and guide it into the volute 4. Specifically, the side panel assembly 14 is parallel to the second vertical plate 18 and has a gap, and the side panel assembly 14 is provided with an air inlet, so that an air duct is formed between the side panel assembly 14 and the second vertical plate 18 so that the airflow enters the volute 4 through the air inlet. The top panel assembly 13, the side panel assembly 14 and the surrounding panel assembly 15 form a accommodating cavity 3 to accommodate the volute 4.

[0069] like Figure 1 、 Figure 6 As shown, a connecting flange 19 is provided at the position where the two fan frame groups 7 are connected to each other. The two fan frame groups 7 have the same structure. Figure 7 Only one fan frame assembly 7 is shown in detail. The two fan frame assemblies 7 are connected by connecting flanges. The fan frame assemblies 7 are connected and fixed by connecting flanges 19, which is simple to operate and convenient for fixing to the outside of the wind rack 1. In particular, the connecting flanges 19 on the two fan frame assemblies 7 can be fixed using connecting members, such as bolts.

[0070] Of course, if Figure 6 As shown, the lower end of the fan frame assembly 7 is also provided with a connecting flange 19, and the connecting flange 19 is used to connect with the smoke collecting hood 26 below the fan system.

[0071] like Figure 7-Figure 8As shown, the volute 4 includes a volute shroud 20 and a volute side plate 21. The lower portion of the volute side plate 21 has an inclined inward-retracting bevel portion 22. The lower portion of the volute side plate has an inclined inward-retracting bevel portion 22. The inward retraction of the bevel portion 22 can reduce the space occupied by the bottom of the volute 4, thereby freeing up more flow channel space.

[0072] like Figure 6 As shown, the fan frame group 7 also includes a guide plate frame 16, which is arranged in the outer frame 12 and connected to the lower end of the side plate assembly 14. The guide plate frame 16 includes a flat portion 23 and a curved portion 24 connected to the lower end of the flat portion 23. The fan frame group 7 is provided with a guide plate frame 16. After the two fan 2 frames are docked, the guide plate frames 16 on the two fan frame groups 7 form an air guide structure. The air guide assembly is arranged in a combination of the flat portion 23 and the curved portion 24, which releases a large amount of flow channel space and ensures that the airflow has sufficient transition space during the process of being guided by the air guide structure, so that the airflow has a gradual process when flowing through the air guide assembly. The airflow first passes through the curved portion 24 and then transitions to the flat portion 23. The gradual process can reduce flow loss and improve the air guide effect of the air guide assembly. Figure 6 As shown, the cut-off portion of the guide plate frame 16 moves inward from the bottom end of the flat portion 23. After the two air guide frame groups are docked, the curved portion 24 thereon is docked and connected at the bottom. An air guide structure is formed on the outside of the entire guide plate frame 16, which guides the airflow at the connection between the fan frame group 7 and the smoke hood 26 to both sides of the volute 4 respectively.

[0073] like Figure 3-Figure 5 As shown, the plane portion 23 is parallel to the inclined portion 22 of the volute side plate 21, and the size of the plane portion 23 is not less than the size of the inclined portion 22. The curved portion 24 is located below the volute 4. The plane portion 23 of the guide plate frame 16 is parallel to the inclined portion 22 of the volute side plate 21, which makes the structure more compact and fits more closely when the volute 4 is connected to the fan frame assembly 7, reducing the generation of vibration. The size of the plane portion 23 is not less than the size of the inclined portion 22, and the curved portion 24 is located below the volute 4, which enables the air guide assembly to release more flow space below the volute 4, so that the space the air guide assembly passes through from the starting position of the guide to the ending position of the guide is significantly larger, as shown in FIG. Figure 3-Figure 5 Shows the state diagram at different cross sections, from Figure 3-Figure 5 It can be seen that the wind guide angles of the guide plates formed by the guide plate frames 16 at each cross section are close to C1≈C2≈C3, and are relatively small, which releases more flow space. The airflow has sufficient space and time to be compressed, and the turning angle of the airflow is significantly reduced when entering the air intake channels D on both sides, reducing flow losses and improving flow efficiency.

[0074] like Figure 4As shown, the first shock-absorbing pad 5 is fixed to the enclosure of the volute 4, and the second shock-absorbing pad 6 is fixed to the side panel assembly 14 of the two fan frame assemblies 7. Furthermore, the first shock-absorbing pad 5 is fixed to the enclosure of the volute 4, and the second shock-absorbing pad 6 is fixed to the side panel assembly 14 of the two fan frame assemblies 7, so that the entire volute 4 and the two fan frame assemblies 7 are separated by the first shock-absorbing pad 5 and the second shock-absorbing pad 6, without any rigid direct connection. The cooperation of the first shock-absorbing pad 5 and the second shock-absorbing pad 6 enables the volute 4 to be fastened to the fan frame 1.

[0075] like Figure 1 As shown, the present invention further provides a range hood 25, comprising the aforementioned fan system.

[0076] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A fan system comprising: Wind rack; a fan, the fan comprising a volute; It is characterized in that the wind frame includes a volute-shaped accommodating cavity, the accommodating cavity is used to support the volute, and the volute and the wind frame are flexibly connected through a shock-absorbing member.

2. The fan system according to claim 1, wherein: The shock absorbing member includes a first shock absorbing pad and a second shock absorbing pad, wherein the first shock absorbing pad is arranged on the volute, and the second shock absorbing pad is arranged on the fan frame.

3. The fan system according to claim 2, wherein: The fan rack includes two fan frame groups, which are docked and connected. The fan system also includes a motor bracket, a motor, an impeller and an air inlet ring. The motor bracket is connected to one of the fan frame groups, the motor is connected to the motor bracket, the impeller is connected to the motor, and the air inlet ring is connected to the other fan frame group.

4. The fan system according to claim 3, wherein: The fan frame group includes an outer frame, a top panel assembly, a side panel assembly and a surrounding panel assembly. The outer frame includes two symmetrically arranged first vertical panels and a second vertical panel connected to the outside of the two first vertical panels. The side panel assembly and the surrounding panel assembly are arranged in the outer frame, and the top panel assembly is arranged in the upper part of the outer frame. One end of the side panel assembly is connected to the first vertical panel, and the other end of the side panel assembly is connected to the other first vertical panel. The side panel assembly is parallel to the second vertical panel and has a gap, and the side panel assembly is provided with an internal air inlet. The top panel assembly, the side panel assembly and the surrounding panel assembly enclose the accommodating cavity.

5. The fan system according to claim 4, characterized in that: The fan frame assembly further includes a guide plate frame, which is disposed within the peripheral frame and connected to the lower end of the side plate assembly. The guide plate frame includes a planar portion and a curved portion connected to the lower end of the planar portion.

6. The fan system according to claim 4, wherein: A connecting flange is provided at a position where the two fan frame assemblies are opposite to each other, and the two fan frame assemblies are connected via the connecting flange.

7. The fan system according to claim 5, characterized in that: The volute comprises a volute enclosure plate and a volute side plate, and the lower portion of the volute side plate is provided with an inclined portion that is inclined inward.

8. The fan system according to claim 7, wherein: The plane portion is parallel to the inclined portion of the volute side plate, a size of the plane portion is not smaller than a size of the inclined portion, and the curved portion is located below the volute.

9. The fan system according to claim 8, wherein: The first shock-absorbing pad is fixed on the side plate of the volute, and the second shock-absorbing pad is fixed on the side plate components of the two fan frame groups.

10. A range hood, characterized in that: The invention comprises a fan system according to any one of claims 1 to 9.

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