Fan frame assembly and range hood comprising same

Abstract

The utility model provides a draught fan frame assembly and a range hood comprising the same, the draught fan frame assembly is connected with a lower shell, the draught fan frame assembly comprises a cover body, the cover body is arranged on the peripheral side of a draught fan in a covering mode, and a noise reduction unit is arranged on the cover body; the cover body is connected to the hanging frame in a hung mode, a sliding unit is further arranged on the hanging frame in the height direction of the cover body, the lower shell is arranged on the peripheral side of the cover body in a sleeving mode, the lower shell is connected to the sliding unit in a sliding mode, and when the lower shell slides to the peripheral side of the cover body, the lower shell is connected to the sliding unit in a sliding mode. The noise reduction unit is located between the inner wall of the lower shell and the cover body. The cover body is arranged on the peripheral side of the fan, and the noise reduction unit is arranged on the cover body, so that noise generated during operation of the fan is prevented from being transmitted to a user through the cover body, and noise reduction of the peripheral side of the fan is achieved. Meanwhile, when the lower shell moves to the peripheral side of the cover body, the cover body is further covered, and noise propagation is further reduced.

Description

Technical Field

[0001] The utility model particularly relates to a fan frame assembly and a range hood comprising the same. Background Art

[0002] The range hood has become one of the indispensable kitchen appliances in modern families. The range hood includes a lower shell and a fan assembly, wherein the fan assembly is located above the lower shell in the height direction and is usually fixedly connected. The lower shell is arranged toward the stove, and the relative distance between the fan assembly and the lower shell remains fixed. When the existing range hood is working, since the cover body arranged on the outer peripheral side of the fan assembly is relatively thin, it is easy to generate vibration when the fan is working, and the noise will be transmitted to the user through the lower shell fixedly connected to the fan assembly, thereby generating noise and transmitting the noise to the user. In addition, since the relative distance between the fan assembly and the lower shell remains unchanged, the lower shell has a trumpet-shaped structure that transmits noise to the user, further resulting in a decreased user experience when using the range hood. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect of excessive noise generated by the fan assembly in the prior art, and to provide a fan frame assembly and a range hood comprising the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A fan rack assembly, wherein a lower housing is connected to the fan rack assembly, and the fan rack assembly comprises:

[0006] A cover body, the cover body is arranged on the outer peripheral side of the fan, and a noise reduction unit is arranged on the cover body;

[0007] A hanging bracket, the cover body is hung on the hanging bracket, and a sliding unit is also provided on the hanging bracket along the height direction of the cover body. The lower shell is sleeved on the outer peripheral side of the cover body, and the lower shell is slidably connected to the sliding unit. When the lower shell slides to the outer peripheral side of the cover body, the noise reduction unit is located between the inner wall of the lower shell and the cover body.

[0008] In this solution, a cover is provided on the outer peripheral side of the fan, and a noise reduction unit is provided on the cover to reduce the noise generated when the fan is running and transmitted to the user through the cover, thereby achieving noise reduction on the outer peripheral side of the fan. At the same time, the cover and the lower shell are hung by a bracket, and the lower shell and the cover are slidably connected along the height direction of the cover through a sliding unit, so that the cover is further covered when the lower shell moves to the outer peripheral side of the cover, further reducing noise transmission. The movable lower shell can adjust the height from the pot according to pots of different heights, and then absorb oil smoke at a suitable distance, so as to achieve efficient absorption of oil smoke for pots of different heights and prevent oil smoke from escaping.

[0009] Preferably, the cover body comprises a front plate, a rear plate and two side plates arranged opposite to each other, the noise reduction unit is arranged on the front plate and the side plates, and the front plate, the side plates and the rear plate are connected in sequence;

[0010] Or the two side panels arranged opposite to each other and the rear panel are integrally formed.

[0011] In this solution, the outer peripheral side of the fan is covered by the above arrangement, and the front plate, side plate and rear plate arranged separately are convenient for transportation. The two side plates and the rear plate are arranged in one piece, which can reduce the installation steps and improve the installation efficiency.

[0012] Preferably, the noise reduction unit includes a first pressure profile and a second pressure profile, and the first pressure profile and the second pressure profile are arranged on the side plate, wherein the first pressure profile is located above the second pressure profile along the height direction of the cover body, and the second pressure profile is arranged corresponding to the side of the fan.

[0013] In this solution, the first pressure profile and the second pressure profile are provided to improve the structural strength of the side plate, thereby preventing the side plate from vibrating along with the fan when the fan is running, thereby reducing noise.

[0014] Preferably, the first pressure profile is in a "U" shape and extends toward the cover body, the second pressure profile extends toward the cover body and the second pressure profile further includes a step groove, a positioning hole is provided in the step groove, and the fan bracket is screwed to the side plate through the positioning hole;

[0015] And / or the depth of the first profile extending toward the cover body is 1-1.5 mm, and the difference between the sides of the middle area and the edge area of ​​the first profile is 15-20 mm.

[0016] In this solution, the first pressure profile is used to improve the structural strength of the side plate, and the second pressure profile is used to screw with the fan bracket to fix the fan volute and reduce the noise generated by the vibration of the volute while improving the structural strength of the side plate.

[0017] Preferably, the noise reduction unit further comprises a buffer, wherein the buffer is located at a side of the sliding unit, and the buffer is arranged on the side plate along a width and / or height direction of the cover body.

[0018] In this solution, through the above arrangement, when the lower shell is located on the outer peripheral side of the cover body, direct contact between the lower shell and the cover body is avoided, and the vibration of the cover body is reduced from being transmitted to the lower shell, thereby reducing noise.

[0019] Preferably, the noise reduction unit further includes a third pressure profile and a fourth pressure profile, and at least the third pressure profile and the fourth pressure profile are arranged on the front plate, and the fourth pressure profile is arranged corresponding to the end cover of the fan;

[0020] And / or the third pressure profile is in a "U" shape and extends toward the cover body, the depth of the third pressure profile extending toward the cover body is 1mm, and the difference between the sides of the middle area and the edge area of ​​the third pressure profile is 10mm.

[0021] In this solution, the third and fourth profiles are provided to improve the structural strength of the front plate. At the same time, the fourth profile is provided opposite to the end cover, and the extension dimension of the third profile toward the cover body is smaller than the extension dimension of the first profile toward the cover body, so as to avoid noise caused by collision between the front plate and the end cover.

[0022] Preferably, a plurality of the third pressure profiles are provided, and the plurality of the third pressure profiles are respectively provided at the upper and lower ends of the fourth pressure profile along the height direction of the cover body.

[0023] In this solution, through the above-mentioned arrangement, the structural strength of each position of the front plate is further improved by increasing the number of third profiles, thereby avoiding noise generated when the fan is running due to insufficient local structural strength.

[0024] Preferably, the rear plate is provided with at least two protrusions at one end away from the lower shell, the bracket is provided with mounting holes corresponding to the protrusions, the protrusions are used to extend into the mounting holes and the bracket is screwed to the rear plate via a bolt assembly.

[0025] In this solution, the above arrangement is adopted to improve the structural stability and reliability when the bracket is hung on the rear plate.

[0026] Preferably, the sliding unit is arranged on the side plate and / or the rear plate along the height direction of the cover body, and the sliding unit includes a slide rail and a limiting portion, and the limiting portion is arranged at the end of the side plate and / or the rear plate away from the hanger.

[0027] In this solution, the above arrangement is used to enable the lower shell to slide relative to the cover body, and the fan and the cover body are connected by the bracket to maintain the same position, so that the noise generated when the lower shell is away from the cookware is smaller than the noise when the lower shell is close to the cookware.

[0028] A range hood comprises the fan frame assembly as described above.

[0029] In the present embodiment, the range hood includes the above-mentioned fan frame assembly, so that the noise generated when the fan is running can be reduced by sliding the lower shell relative to the cover body, that is, by lifting and lowering along the height direction of the cover body. In addition, the lower shell can be raised and lowered to specifically absorb oil smoke from pots of different heights to prevent the oil smoke from escaping.

[0030] The positive and progressive effect of the utility model is that the utility model sets a cover body on the outer peripheral side of the fan, and sets a noise reduction unit on the cover body, so as to reduce the noise generated when the fan is running and transmitted to the user through the cover body, thereby realizing noise reduction on the outer peripheral side of the fan. At the same time, the cover body and the lower shell are hung by the hanging bracket, and the lower shell and the cover body are slidably connected along the height direction of the cover body through the sliding unit, so that the cover body is further covered when the lower shell moves to the outer peripheral side of the cover body, thereby further reducing noise transmission, and the movable lower shell can adjust the height from the pot according to pots of different heights, and then absorb the oil smoke at a suitable distance, so as to realize efficient absorption of oil smoke for pots of different heights and prevent the oil smoke from escaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a three-dimensional diagram of a fan frame assembly according to an embodiment of the present invention.

[0032] Figure 2 FIG. 1 is a diagram showing the position relationship between the sliding unit and the rear plate according to an embodiment of the present invention.

[0033] Figure 3 It is a three-dimensional diagram of a cover body according to an embodiment of the present invention.

[0034] Figure 4 This is a positional relationship diagram of a lower housing and a fan frame assembly according to an embodiment of the utility model.

[0035] Description of reference numerals:

[0036] Wind rack assembly 100

[0037] Lower housing 10

[0038] Cover body 20

[0039] Front panel 21

[0040] Back plate 22

[0041] Protrusion 221

[0042] Side Panel 23

[0043] Top Plate 24

[0044] Fan 30

[0045] Air outlet 31

[0046] Rack 40

[0047] Mounting hole 41

[0048] Noise reduction unit 1

[0049] First press 11

[0050] Second pressing 12

[0051] Step groove 121

[0052] Positioning hole 1211

[0053] The third press 13

[0054] Fourth pressure type 14

[0055] Buffer 15

[0056] Sliding unit 2

[0057] Slide 25

[0058] Limiting part 26 DETAILED DESCRIPTION

[0059] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0060] This embodiment provides a fan rack assembly, the specific structure of which is as follows Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fan frame assembly 100 is connected to a lower housing 10, and the fan frame assembly 100 includes:

[0061] A cover body 20, the cover body 20 is arranged on the outer peripheral side of the fan 30, and a noise reduction unit 1 is arranged on the cover body 20;

[0062] The cover body 20 is hung on the hanger 40, and a sliding unit 2 is also provided on the hanger 40 along the height direction of the cover body 20. The lower shell 10 is sleeved on the outer peripheral side of the cover body 20, and the lower shell 10 is slidably connected to the sliding unit 2. When the lower shell 10 slides to the outer peripheral side of the cover body 20, the noise reduction unit 1 is located between the inner wall of the lower shell 10 and the cover body 20.

[0063] Specifically, the fan 30 includes a volute and a bracket arranged on the outer peripheral side of the volute. The fan also includes an air outlet 31, which is arranged away from the lower shell 10 and extends from the top of the cover body 20. The oil smoke is sucked into the fan through the lower shell 10 and is discharged through the air outlet 31. The cover body 20 is arranged on the outer peripheral side of the fan 30 to wrap the fan 30. It can be understood that the vibration of the fan 30 during operation is caused by the blades of the fan 30 driving the air and oil smoke to move and hit the volute. The air between the volute and the cover body 20 transmits the vibration of the volute to the cover body 20, thereby causing the cover body 20 to vibrate and emit noise. A noise reduction unit 1 is provided on the cover body 20 to reduce the vibration of the cover body 20, thereby reducing the noise generated by the vibration during the operation of the fan 30 and transmitting it to the user through the cover body 20, thereby achieving noise reduction on the outer peripheral side of the fan 30. In this embodiment, the cover body 20 is a rectangular structure, which accommodates the fan 30. In other embodiments, the cover body 20 can also be a cubic structure or a structure of other shapes. The purpose is to effectively wrap the fan 30 and reduce the vibration of the cover body 20 by the noise reduction unit 1 to achieve noise reduction.

[0064] At the same time, in this embodiment, the cover body 20 and the lower shell 10 slide along the height direction of the cover body 20 through the sliding unit 2. Compared with the way that the cover body 20 and the lower shell 10 are arranged up and down along the height direction of the cover body 20 and are fixedly connected, the movable lower shell 10 can adjust the height from the cookware for cookware of different heights, and then absorb the oil smoke at a suitable distance, so as to achieve efficient absorption of oil smoke for cookware of different heights and prevent the oil smoke from escaping. The lower shell 10 is a structure used for guiding oil smoke in the prior art. The appropriate height of the lower shell 10 from the cookware belongs to the prior art, which is not improved in this embodiment and will not be described in detail here.

[0065] It should be noted that when the lower shell 10 that can slide relative to the cover body 20 through the sliding unit 2 slides to the outer peripheral side of the cover body 20, the noise reduction unit 1 is located between the cover body 20 and the lower shell 10. From the appearance point of view, the cover body 20 and the lower shell 10 are located at the same height. On the basis of reducing the vibration of the cover body 20 and thus reducing the noise through the noise reduction unit 1, the lower shell 10 located at the outer peripheral side of the cover body 20 can further reduce the noise transmission to the user, that is, the noise transmission is cut off by wrapping the cover body 20. In addition, it can be understood that the lower shell 10 and the cover body 20 are arranged up and down along the height direction of the cover body 20, and the lower shell 10 is closer to the user than when the cover body 20 and the lower shell 10 are at the same height, that is, when the cover body 20 and the lower shell 10 are at the same height, the lower shell 10 is farther away from the user, and the noise received by the user is reduced by being farther away from the user.

[0066] In this embodiment, the cover body 20 is hung on the bracket 40, and the cover body 20 reduces vibration through the noise reduction unit 1. Compared with the traditional range hood that directly hangs the fan frame on the bracket 40, the way the cover body 20 is connected to the fan frame can reduce the vibration of the bracket 40 caused by the fan running. On the one hand, it reduces noise, and on the other hand, it can improve the reliability of the connection between the bracket 40 and the wall, and prevent the bolts connecting the fan frame and the bracket 40 from loosening.

[0067] In this embodiment, the cover body 20 includes a front plate 21, a rear plate 22 and two oppositely arranged side plates 23, the noise reduction unit 1 is arranged on the front plate 21 and the side plates 23, and the front plate 21, the side plates 23 and the rear plate 22 are connected in sequence.

[0068] Among them, the side plate 23 and the rear plate 22 are flat plates, and the front plate 21 is a flat plate with a thickness of 0.7mm. The edges of the front plate 21, the rear plate 22 and the side plate 23 are provided with flanges, and threaded holes are provided on the flanges. The front plate 21, the rear plate 22 and the two side plates 23 are sequentially enclosed by screw connection to form a rectangular parallelepiped structure, and the outer peripheral side of the fan 30 is covered. The front plate 21, the side plate 23 and the rear plate 22 are arranged separately for easy transportation. It can be understood that the cover body 20 of this embodiment is also provided with a top plate 24 corresponding to the air outlet 31, and the top plate 24 is screwed with the front plate 21, the side plate 23 and the rear plate 22, and the top plate 24 is provided with a avoidance hole for the air outlet 31 to extend out of the cover body 20.

[0069] In another embodiment, the two side panels 23 and the rear panel 22 are arranged in an integral manner. The front panel 21 is screwed to the two integrally formed side panels 23 and the rear panel 22 by bolt assemblies. The two side panels 23 and the rear panel 22 are arranged in an integral manner, which can reduce the installation steps of the cover body 20 and improve the installation efficiency.

[0070] In this embodiment, the noise reduction unit 1 includes a first pressure profile 11 and a second pressure profile 12, and the first pressure profile 11 and the second pressure profile 12 are arranged on the side plate 23, wherein the first pressure profile 11 is located above the second pressure profile 12 along the height direction of the cover body 20, and the second pressure profile 12 is arranged corresponding to the side of the fan 30.

[0071] Specifically, both the first corrugation 11 and the second corrugation 12 are provided on the side plate 23. The first corrugation 11 and the second corrugation 12 are corrugations made by stamping process on flat plates in the prior art. This is the prior art and will not be elaborated here. Through the second corrugation 12, the structural strength of the side plate 23 is enhanced. Since the second corrugation 12 is provided corresponding to the side of the fan 30, and the fan 30 is provided near the lower half area of the housing 20, the first corrugation 11 is then provided above the second corrugation 12 to correspondingly enhance the structural strength of the side plate 23 corresponding to the upper half area of the housing 20, avoiding the side plate 23 from vibrating following the fan 30 during the operation of the fan 30, especially local vibration of the side plate 23, and thus reducing noise.

[0072] Further, the first corrugation 11 is in a shape of a "hui" character and extends towards the inside of the housing 20. The second corrugation 12 extends towards the inside of the housing 20 and a step groove 121 is further included inside the second corrugation 12. A positioning hole 1211 is provided in the step groove 121. The bracket of the fan 30 is screwed to the side plate 23 through the positioning hole 1211.

[0073] Specifically, the first corrugation 11 in the shape of a "hui" character includes a middle area and an edge area. Between the middle area and the edge area, it extends towards the inside of the housing 20, and the extension depth is 1 - 1.5 mm. The difference between the side edges of the middle area and the edge area of the first corrugation 11 is 15 - 20 mm to enhance the structural strength of the side plate 23 through the first corrugation 11. The second corrugation 12 is provided corresponding to the bracket of the fan 30. In this embodiment, the bracket is provided on the outer peripheral side of the volute of the fan 30 and is bolted to the volute, and the other end of the bracket is screwed to the bolt extending into the positioning hole 1211 to play a role in fixing the volute and reducing the noise generated by the vibration of the volute.

[0074] It should be noted that in this embodiment, the second corrugation 12 is in a shape of a rectangular groove and extends towards the inside of the housing 20. The step groove 121 is located at the bottom of the rectangular groove and further extends towards the bracket from the bottom of the rectangular groove. The positioning hole 1211 is located at the bottom of the step groove 121. The depth of the step groove 121 is 3.5 mm. In other embodiments, the step groove 121 can also be of other depths, and its depth depends on the distance between the second corrugation 12 and the bracket, which will not be elaborated here. The step groove 121 is a waist-shaped groove. Compared with a rectangular groove, there are no sharp dead corners inside the groove, making it easier to clean.

[0075] In this embodiment, the noise reduction unit 1 further includes a buffer member 15. The buffer member 15 is located at the side of the sliding unit 2. The buffer member 15 is provided on the side plate 23 along the width and / or height direction of the housing 20.

[0076] Specifically, the buffer 15 is a rectangular structure with a length of 13 cm, a width of 1.9 cm and a thickness of 2 cm. The buffer 15 is arranged on the side of the first pressure profile 11 along the height direction of the cover body 20 and away from the sliding unit 2 to avoid interference with the sliding unit 2.

[0077] In addition, the buffer 15 is arranged on the side of the second pressure profile 12 along the width direction of the cover body 20, and is located between the first pressure profile 11 and the second pressure profile 12, so as to avoid direct contact between the lower shell 10 and the cover body 20 when the lower shell 10 is located on the outer peripheral side of the cover body 20, reduce the vibration of the cover body 20 transmitted to the lower shell 10, and thus reduce noise. The buffer 15 of this embodiment is a rubber block in the prior art.

[0078] In other embodiments, the buffer 15 can also be arranged on the side of the second pressure profile 12 along the height direction of the cover body 20, and on the side of the first pressure profile 11 along the width direction of the cover body 20, which can also achieve the above purpose, and will not be described in detail here. In addition, the buffer 15 can also be other materials used to reduce vibration in the prior art, such as sponge.

[0079] In this embodiment, rubber strips are further provided at the ends of the front plate 21, the rear plate 22 and the side plate 23 near the lower shell 10 to seal the connection between the lower shell 10 and the cover body 20. In addition, the rubber strips are used to avoid contact with components such as the lower shell 10 during the sliding process of the lower shell 10 relative to the cover body 20, thereby reducing the noise generated by the collision sound.

[0080] In this embodiment, the noise reduction unit 1 further includes a third pressure profile 13 and a fourth pressure profile 14. At least the third pressure profile 13 and the fourth pressure profile 14 are arranged on the front plate 21. The fourth pressure profile 14 is arranged corresponding to the end cover of the fan 30.

[0081] Specifically, the front plate 21 is provided with a fourth profile 14 and at least one third profile 13, and the fourth profile is provided corresponding to the end cover of the fan 30, so as to avoid the situation that the front plate 21 is 0.7 mm thick and the motor end cover of the fan 30 is concave toward the end cover when the fan 30 is running, thereby contacting and colliding with the motor and generating noise. The structural strength of the front plate 21 is improved by providing the fourth profile 14. In this embodiment, the fourth profile 14 is an irregular shape, which corresponds to the shape of the end cover and includes two rectangular structures and one arc structure. In other embodiments, the fourth profile 14 can also adjust the shape of the fourth profile 14 according to the motor power of the fan 30. This is a prior art and will not be described in detail here.

[0082] In this embodiment, the third pressure profile 13 is in a "U" shape and extends toward the cover body 20. The depth of the third pressure profile 13 extending toward the cover body 20 is 1 mm, and the difference between the sides of the middle area and the edge area of ​​the third pressure profile 13 is 10 mm. The third pressure profile 13 is provided to improve the structural strength of the front plate 21. At the same time, the extension dimension of the third pressure profile 13 toward the cover body 20 is smaller than the extension dimension of the first pressure profile 11 toward the cover body 20, thereby avoiding the situation where the third pressure profile 13 contacts the motor of the fan 30 due to excessive extension depth.

[0083] In this embodiment, a plurality of third profiles 13 are provided and the plurality of third profiles 13 are respectively provided at the upper and lower ends of the fourth profile 14 along the height direction of the cover body 20. The fourth profile 14 is provided corresponding to the motor end cover of the fan 30 and is located in the middle area of ​​the front plate 21. By increasing the number of the third profiles 13 and providing the third profiles 13 at both ends of the fourth profile 14, the structural strength of each position of the front plate 21 is further improved to avoid noise generated when the fan 30 is running due to insufficient local structural strength.

[0084] In this embodiment, at least two protrusions 221 are provided at one end of the rear plate 22 away from the lower shell 10, and the bracket 40 is provided with mounting holes 41 corresponding to the protrusions 221. The protrusions 221 are used to extend into the mounting holes 41 and the bracket 40 and the rear plate 22 are screwed together by a bolt assembly.

[0085] Specifically, the protrusions 221 are arranged side by side along the length direction of the rear plate 22, and the hanger 40 also extends along the length direction of the rear plate 22. The hanger 40 is a plate and the hanger 40 and the rear plate 22 are screwed together by a bolt assembly. At the same time, the hanger 40 and the rear plate 22 are also clamped together by the protrusion 221 extending into the mounting hole 41. The protrusion 221 is a rectangular structure, and the mounting hole 41 is a rectangular hole. When the rear plate 22 is hung on the hanger 40, the protrusion 221 is pre-positioned by extending into the mounting hole 41, so that the hole positions of the hanger 40 and the rear plate 22 correspond when being screwed together, which reduces the installation time and improves the convenience of installation. In addition, the structural stability and reliability of the hanger 40 when the rear plate 22 is hung are improved.

[0086] In this embodiment, the sliding unit 2 is arranged on the side plate 23 and the rear plate 22 along the height direction of the cover body 20. The sliding unit 2 includes a slide rail 25 and a limit portion 26. The limit portion 26 is arranged at the end of the side plate 23 and the rear plate 22 away from the bracket 40.

[0087] Specifically, the limiting portion 26 is a plastic adapter, and the slide rail 25 extends from the hanger 40 toward the limiting portion 26. The slide rail 25 includes an inner rail, an outer rail, and a holder. The lower shell 10 is fixedly connected to the holder, and the holder is slidably connected to the inner rail, and the inner rail is slidably connected to the outer rail. It can be understood that the outer rail, the inner rail, and the holder are all slide rail 25 structures in the prior art, and no further details are given here. The limiting portion 26 is arranged at the end of the side plate 23 and the rear plate 22 facing the lower shell 10 and is located at the connection between the side plate 23 and the rear plate 22. A rubber strip is arranged between two adjacent limiting portions 26. The limiting portion 26 is used to limit the holder and the inner rail, thereby preventing the lower shell 10 from being separated from the rail 25 when the lower shell 10 slides relative to the cover body 20. When the lower shell 10 slides relative to the cover 20, the fan 30 and the cover 20 are connected by the bracket 40 to keep the same position, so that the noise generated when the lower shell 10 is away from the cookware is smaller than the noise when the lower shell 10 is close to the cookware.

[0088] In another embodiment, the sliding unit 2 can also be separately arranged on the side plate 23 or the rear plate 22, and the corresponding limiting portion 26 can be separately arranged on the side plate 23 or the rear plate 22. It can also achieve the above purpose, which is the prior art and will not be described in detail here.

[0089] The present embodiment also provides a range hood, which includes the above-mentioned fan frame assembly 100. In the range hood, the lower housing 10 is slidably connected to the cover 20, and the cover 20 is provided with a noise reduction unit 1, so that the noise generated by the fan 30 during operation can be reduced by sliding the lower housing 10 relative to the cover 20, that is, by lifting and lowering along the height direction of the cover 20. In addition, the lower housing 10 can be lifted and lowered to absorb the oil smoke in a targeted manner for pots of different heights to prevent the oil smoke from escaping.

[0090] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A fan rack assembly, wherein a lower housing is connected to the fan rack assembly, characterized in that: The fan rack assembly includes: A cover body, the cover body is arranged on the outer peripheral side of the fan, and a noise reduction unit is arranged on the cover body; A hanging bracket, the cover body is hung on the hanging bracket, and a sliding unit is also provided on the hanging bracket along the height direction of the cover body. The lower shell is sleeved on the outer peripheral side of the cover body, and the lower shell is slidably connected to the sliding unit. When the lower shell slides to the outer peripheral side of the cover body, the noise reduction unit is located between the inner wall of the lower shell and the cover body.

2. The fan rack assembly according to claim 1, characterized in that: The cover body includes a front plate, a rear plate and two side plates arranged opposite to each other, the noise reduction unit is arranged on the front plate and the side plates, and the front plate, the side plates and the rear plate are connected in sequence; Or the two side panels arranged opposite to each other and the rear panel are integrally formed.

3. The fan rack assembly according to claim 2, characterized in that: The noise reduction unit includes a first pressure profile and a second pressure profile, and the first pressure profile and the second pressure profile are arranged on the side plate, wherein the first pressure profile is located above the second pressure profile along the height direction of the cover body, and the second pressure profile is arranged corresponding to the side of the fan.

4. The fan rack assembly according to claim 3, characterized in that: The first pressure profile is in a "U" shape and extends toward the cover body, the second pressure profile extends toward the cover body and includes a step groove, a positioning hole is provided in the step groove, and the fan bracket is screwed to the side plate through the positioning hole; And / or the depth of the first profile extending toward the cover body is 1-1.5 mm, and the difference between the sides of the middle area and the edge area of ​​the first profile is 15-20 mm.

5. The fan rack assembly according to claim 4, characterized in that: The noise reduction unit further includes a buffer, which is located at a side of the sliding unit and is arranged on the side plate along a width and / or height direction of the cover body.

6. The fan rack assembly according to claim 2, characterized in that: The noise reduction unit further includes a third pressure profile and a fourth pressure profile, at least the third pressure profile and the fourth pressure profile are arranged on the front plate, and the fourth pressure profile is arranged corresponding to the end cover of the fan; And / or the third pressure profile is in a "U" shape and extends toward the cover body, the depth of the third pressure profile extending toward the cover body is 1mm, and the difference between the sides of the middle area and the edge area of ​​the third pressure profile is 10mm.

7. The fan rack assembly according to claim 6, characterized in that: The third pressure profile is provided in plurality and the plurality of third pressure profiles are respectively arranged at the upper and lower ends of the fourth pressure profile along the height direction of the cover body.

8. The fan rack assembly according to claim 2, characterized in that: The rear plate is provided with at least two protrusions at one end away from the lower shell, and the bracket is provided with mounting holes corresponding to the protrusions. The protrusions are used to extend into the mounting holes, and the bracket is screwed to the rear plate through a bolt assembly.

9. The wind rack assembly according to claim 8, characterized in that: The sliding unit is arranged on the side plate and / or the rear plate along the height direction of the cover body, and the sliding unit includes a slide rail and a limiting portion, and the limiting portion is arranged at the end of the side plate and / or the rear plate away from the hanger.

10. A range hood, characterized in that: The range hood comprises a fan frame assembly as claimed in any one of claims 1 to 9.

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