CN108386889B

CN108386889B - Fume exhaust fan

Info

Publication number: CN108386889B
Application number: CN201810555312.7A
Authority: CN
Inventors: 陈昊; 刘伟龙; 谭柏豪; 蒋济武; 季俊生
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2018-05-31
Filing date: 2018-05-31
Publication date: 2024-03-08
Anticipated expiration: 2038-05-31
Also published as: CN108386889A

Abstract

The invention discloses a range hood, which comprises: the fan box is provided with an air inlet and an air outlet, and the air outlet is positioned on the side wall of the fan box; the fan comprises a volute and a wind wheel, the wind wheel is installed in the volute, the volute is vertically arranged in the fan box, an air suction inlet of the volute faces to the side wall of the fan box, and an air supply outlet of the volute faces to the air outlet. The technical scheme of the invention greatly reduces the thickness of the fan case and is beneficial to installation.

Description

Fume exhaust fan

Technical Field

The invention relates to the technical field of range hoods, in particular to a range hood.

Background

The existing range hood usually discharges smoke upwards, and under the action of a fan, the smoke collected by the smoke collecting hood is discharged outdoors. In order to enhance the smoke exhaust effect, the fan is generally transversely arranged, so that the air suction inlet of the fan faces the air outlet of the smoke collecting cover. However, the thickness of the fan case is greatly increased due to the transverse arrangement of the fan, which is not beneficial to the flat design of the range hood, so that the range hood is difficult to be arranged in a cabinet.

Disclosure of Invention

The invention aims to provide a range hood, which aims to reduce the thickness of a fan case.

In order to achieve the above purpose, the invention provides a range hood, a fan box, wherein the fan box is provided with an air inlet and an air outlet, and the air outlet is positioned on the side wall of the fan box;

the fan comprises a volute and a wind wheel, the wind wheel is installed in the volute, the volute is vertically arranged in the fan box, an air suction inlet of the volute faces to the side wall of the fan box, and an air supply outlet of the volute faces to the air outlet.

Preferably, an upper bracket is arranged at the top of the volute, and one end, far away from the volute, of the upper bracket is fixedly connected with the fan box.

Preferably, the upper bracket comprises a hanging plate in a U shape, one end of the hanging plate is fixedly attached to the side plate of the volute, and the middle plate of the hanging plate is fixedly attached to the top of the case.

Preferably, a lower bracket is arranged at the lower part of the volute, and one end of the lower bracket, which is far away from the volute, is fixedly connected with the fan box.

Preferably, the lower bracket comprises a base plate fixedly connected with the volute, a fixed plate and a connecting arm for connecting the base plate and the fixed plate;

the base plate with spiral case fixed connection, the fixed plate with fan case's lateral wall laminating fixed connection.

Preferably, the cross section of the connecting arm is arranged in a V shape, and the tip end of the connecting arm faces the air inlet.

Preferably, the bottom of the connecting arm is fixedly connected with the bottom of the fan box.

Preferably, the top of the connecting arm is provided with a mounting groove, and the bottom of the mounting groove is connected with the bottom of the fan box through a fastener.

Preferably, the range hood further comprises a silencer, wherein the silencer is provided with an air inlet, an air outlet and a silencing channel communicated with the air inlet and the air outlet, and the air outlet is communicated with the air inlet;

the volute is arranged in the middle of the fan box, so that air flows uniformly enter the fan box from the air inlets from the two sides of the volute.

Preferably, one end of the silencer, which is far away from the fan case, is connected with the top of a fume collecting hood of the range hood;

the range hood further comprises a decoration cover, the bottom of the decoration cover is abutted with the bottom of the fume collecting hood, and the top of the decoration cover is flush with the top of the fan box.

In the technical scheme of the invention, the fan is vertically arranged in the fan case, the air inlet is formed in the bottom of the fan case, the air outlet is formed in the left side, and the air suction inlet of the volute faces the front side wall and/or the rear side wall of the fan case, so that the volute is parallel to the front side wall or the rear side wall, the thickness of the fan case in the front-rear direction is greatly reduced, the fan case with reduced thickness can be arranged in a cabinet, the more flexible installation of the range hood is facilitated, and the adaptability of the range hood is facilitated to be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of an embodiment of a range hood according to the present invention;

FIG. 2 is a schematic diagram of an exploded view of the embodiment of FIG. 1;

FIG. 3 is a schematic diagram of an exploded view of another embodiment of FIG. 1;

FIG. 4 is a schematic diagram illustrating an internal structure of the embodiment of FIG. 1;

fig. 5 is a schematic structural view of an embodiment of a fan case of the range hood according to the present invention;

fig. 6 is a schematic view illustrating an internal structure of a fan assembly of the range hood according to the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

FIG. 8 is a schematic structural view of an embodiment of the sound-proof housing of FIG. 3;

FIG. 9 is a schematic view of the internal structure of FIG. 8;

FIG. 10 is a schematic diagram illustrating an embodiment of the transfer assembly of FIG. 3;

FIG. 11 is a schematic view of the internal structure of FIG. 10;

FIG. 12 is a schematic view of the explosive structure of FIG. 10;

FIG. 13 is a schematic view of the fan assembly and adapter assembly of FIG. 3 after mating;

FIG. 14 is an enlarged view of a portion of FIG. 13 at B;

FIG. 15 is a schematic view of the internal structure of the fan case assembly of FIG. 3;

FIG. 16 is an enlarged view of a portion of FIG. 15 at C;

fig. 17 is a partial enlarged view at D in fig. 15;

FIG. 18 is a schematic view of the internal structure of another embodiment of the fan case assembly of FIG. 3;

FIG. 19 is a schematic cross-sectional view of the structure M-M in FIG. 18;

FIG. 20 is a schematic view of the muffler of FIG. 3;

fig. 21 is a schematic view of the internal structure of fig. 20.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Referring to fig. 1 to 3, the range hood provided in the present application mainly includes a fume collecting hood close to a user, a fan assembly disposed away from the user, a muffler 500 disposed between the fan assembly and the fume collecting hood, and a switching assembly 900 disposed between the muffler 500 and the fan assembly; under the action of the fan assembly, the fume collecting hood gathers the fume generated in the cooking process, enters the silencing channel 533 through the air inlet 510 of the silencer 500, enters the fan case 300 through the switching assembly 900 and is then discharged. Of the above components, the muffler 500 and the adaptor assembly 900 may not be present in some embodiments, and each component may be provided and modified to provide a better result for the range hood. By providing the sound deadening chamber 534 in the muffler 500, the propagation of noise can be greatly reduced; through the arrangement of the adapter assembly 900, the range hood can adapt to more complex working conditions (a wall of a user) so as to improve the adaptability of the range hood; the noise source (fan) can be far away from the user through the improvement of the fan assembly; by disposing the air outlet 320 on the side wall of the casing 300 and vertically disposing the scroll casing 340, the thickness of the casing 300 is greatly reduced, flexibility and adaptability of installation thereof are improved, and the like.

The specific structure of each component of the range hood and the connection relationship between each component will be mainly described below, and the fan assembly, the muffler 500, the adapter assembly 900, and the soundproof cover 600 will be sequentially described.

The fan assembly comprises a fan case 300, a volute 340 arranged in the case, a wind wheel and the like. The fan case 300 has an air inlet 310 and an air outlet 320, and a check valve 360 is disposed at the position of the air outlet 320, however, in some embodiments, the check valve 360 may be installed at a smoke outlet on a wall, and the check valve 360 communicates with the air outlet 320 through a smoke exhaust pipe. The rotor is mounted within a volute 340, the volute 340 being mounted in the fan housing 300.

The fan case 300, the appearance of fan case 300 is box form setting, and air intake 310 sets up in the bottom of fan case 300, and air outlet 320 can set up on the lateral wall or the top, takes the lateral wall as an example to set up. The air outlet 320 is connected with a smoke exhaust pipe, the smoke exhaust pipe is transversely arranged, and the other end of the smoke exhaust pipe is communicated with a smoke outlet on the wall body so as to exhaust the cooking fume generated by cooking outdoors. Regarding the specific components of the fan case 300, the fan case 300 includes a case plate 370 and an L-shaped sealing plate 380, the case plate 370 and the sealing plate 380 are spliced to form the fan case 300, and the air outlet 320 is provided on the sealing plate 380. Wherein, a second fastening hole 371 is formed at the top of the case plate 370 for fixing the top of the scroll case 340; a fixing hole 381 is formed at the bottom of the sealing plate 380, and the fixing hole 381 is used for fixing the bottom of the scroll case. The fan case 300 is arranged in a hexahedral shape, and the sealing plate 380 includes one side plate and a bottom plate of the fan case 300; the cabinet panel 370 includes three side panels and a top panel. The two notches (to be sealed by the sealing plate 380) of the case plate 370 are provided with flanges (bottom and side), and the sealing plate 380 is covered on the flanges and is fastened by screws or is connected by welding.

By arranging the fan case 300 to be formed by splicing the case plate 370 and the sealing plate 380, compared with the fan case 300 formed by folding a whole plate and splicing six plates, the production and manufacturing difficulties are greatly reduced; in addition, since the sealing plate 380 comprises a bottom plate, the bottom plate is separately arranged from the side plate provided with the air outlet 320, namely the air inlet 310 is arranged on the sealing plate 380, and the air outlet 320 is arranged on the machine box plate 370, so that the processing of the air inlet 310 and the processing of the air outlet 320 are not influenced, and the air inlet 310 and the air outlet 320 can be processed simultaneously, thereby effectively improving the forming efficiency of the air inlet 310 and the air outlet 320 and being beneficial to improving the manufacturing efficiency of the fan box 300.

In order to improve the installation stability of the fan case 300, the sidewall of the upper portion of the fan case 300 is protruded outwards, and a hanging opening 330 is formed at the lower portion of the protruded portion for installing the fan case 300. The hanging port 330 is opened downward for the support member to be inserted thereinto to support the entire fan case 300. The number of hanging-up ports 330 may be two, three, four or more, for example six. Six hanging ports 330 are respectively arranged on three side walls except for the air outlet 320, two are respectively arranged on each side wall and are respectively arranged near the connection parts of the adjacent side plates. By providing a plurality of hanging-up ports 330, a suitable hanging-up port 330 may be selected for use according to the specific room layout of the user.

The volute 340 is disposed in the chassis 300, the volute 340 is vertically disposed in the fan case 300, the air suction inlet 310 of the volute 340 faces the side wall of the fan case 300, and the air supply outlet 342 of the volute 340 faces the air outlet 320. The scroll case 340 is provided in a 6 shape, and has an air suction opening 341 and an air supply opening 342, the air suction opening 341 being provided toward a side wall of the fan case 300, and the air supply opening 342 being provided toward the air outlet 320 of the fan case 300. The wind wheel rotates in the volute 340, the wind is discharged out of the volute 340, negative pressure is formed in the volute 340, and under the action of the negative pressure, air flow enters the volute 340 from the air suction inlet 341. Taking the case where the air outlet 320 is formed at the left side of the fan case 300, the scroll casing 340 is parallel to the front sidewall and/or the rear sidewall.

Through so setting up spiral case 340 for spiral case 340 reduces in the thickness that the fore-and-aft direction occupied, thereby makes the thickness of fan case can obtain reducing by a wide margin, is favorable to the installation of fan case, makes the fan case can install in the middle of the cupboard, is favorable to increasing the installation adaptability of fan case. Of course, in some embodiments, there may be many types of fans that may be used, such as centrifugal fans, mixed flow fans, axial flow fans, and the like. In the embodiment, the wind wheel is a centrifugal wind wheel, the air supply distance of the centrifugal wind wheel is far, and the oil smoke can be sent out to a far-away position, so that the oil smoke reflux is reduced; meanwhile, the noise of the centrifugal wind wheel is low, so that the excessively loud noise of the range hood during working can be avoided. Preferably, the axis of the centrifugal wind wheel is arranged in the front-rear direction (perpendicular to the axis of the air inlet and the air outlet), so that the air inlet side of the centrifugal wind wheel faces the front side or the rear side.

It should be noted that, the volute 340 may be provided with air from one side or two sides. When the air is introduced from both sides of the volute 340, the air inlet of the volute 340 can be greatly increased, so that the smoke discharging efficiency of the fan is improved. The bottom of the fan case 300 is provided with a sealing flange along the circumferential direction of the air inlet 310, and the sealing flange is formed with a sealing groove 343. The fan adapter 700 is provided with a mounting edge 710 extending along the radial direction thereof near one end of the air inlet 310, and a sealing flange 720 is formed on the mounting edge 710 corresponding to the sealing groove 343.

The fan assembly further includes an upper bracket 390 and a lower bracket 800 for securing the volute 340 to the interior of the fan case 300. The end of the upper bracket 390 remote from the volute 340 is fixedly connected to the fan case 300. The upper bracket 390 includes a hanging plate, one end of which is fixedly connected with the volute 340, and the other end of which is fixedly connected with the inner wall of the fan case 300. The hanging plate 390 is L-shaped, and the plate surface of one section is attached and fixed with the fixed part at one side of the volute 340 by welding or by screw connection; the other plate surface is attached to the top wall surface of the front side or the rear side of the fan case 300, and is welded or screwed to pass through the first fastening hole (formed in the hanging plate) and the second fastening hole (formed in the top of the fan case). Of course, in some embodiments, the hanging plate 390 may also be provided in a U-shape. The upper bracket 390 includes two hanging plates respectively disposed on the top of the side walls of the front and rear sides of the chassis 300 (for example, the air outlet 320 is formed on the left side or the right side), for example, at the middle position of the front and rear side plates.

Regarding the lower bracket 800, a lower bracket 800 is disposed at a lower portion of the scroll case 340, and an end of the lower bracket 800 remote from the scroll case 340 is fixedly connected to the fan case 300. The lower bracket 800 includes a base plate 810 fixedly connected with the scroll case 340, a fixing plate 820, and a connection arm 830 connecting the base plate 810 and the fixing plate 820; the base plate 810 is fixedly connected with the volute 340, and the fixing plate 820 is fixedly connected with the side wall of the fan case 300 in a fitting manner.

In this embodiment, the base plate 810 is attached to the bottom of the scroll 340, and is fixed by welding or screw fastening. The fixing plate 820 is fixed to the front or rear side wall of the fan case 300 by welding or screw fastening. The bottom of the connecting arm 830 is fixedly connected with the bottom of the fan case 300. There are many ways of fixing it, such as welding, fastening by screws, etc. Taking the connection by a fastener as an example, the top of the connecting arm 830 is provided with a mounting groove 831, and the bottom of the mounting groove 831 is connected with the bottom of the fan case 300 by a fastener. A fixing hole is formed in the bottom of the fan case 300, and a screw penetrates through the bottom of the mounting groove 831 and the fixing hole to fixedly connect the connection arm 830 to the bottom of the fan case 300. The number of the lower brackets 800 is two, and the lower brackets are respectively arranged at the bottoms of the front side and the rear side of the scroll casing 340 to jointly fix the scroll casing 340.

In this way, the spiral case 340 and the top, front side, rear side and bottom of the fan case 300 are simultaneously made, so that the spiral case 340 needs to overcome the damping of one or more of the top, front side wall, rear side wall and bottom of the fan case 300 when vibrating, thereby greatly increasing the energy required by the vibration of the spiral case 340, effectively weakening the vibration of the spiral case 340 and reducing the output of noise. Meanwhile, by suspending the scroll casing 340 in the fan case 300, most of the noise generated by the scroll casing 340 is transmitted to the air around the scroll casing 340, and most of the vibration generated by the air is blocked by the side wall of the fan case 300, thereby reducing the transmission of the noise.

In order to make the air flow smoothly enter the fan case 300, the cross section of the connecting arm 830 is arranged in a V shape, and the tip of the connecting arm 830 faces the air inlet. By setting the cross section of the connecting arm 830 to be V-shaped, the two sides of the connecting arm 830 are respectively formed with a diversion slope, and under the guiding action of the diversion slope, the air flow can not be disturbed due to sudden encountering strong damping, thereby avoiding the influence on the air flow entering due to the setting of the connecting arm 830. In combination with the above embodiment, it is achieved that the connection strength of the scroll casing 340 is enhanced and the generation and transmission of noise of the scroll casing 340 is reduced while the air flow into the inside of the fan case 300 is not affected.

In some embodiments, in order to make the air inlet at two sides of the volute 340 uniform and make full use of the muffler below, the range hood further includes a muffler, the muffler has an air inlet, an air outlet, and a silencing channel communicating the air inlet and the air outlet, and the air outlet is communicated with the air inlet; the volute 340 is disposed in the middle of the fan case 300, so that the air flow uniformly enters the fan case 300 from the air inlet from both sides of the volute 340. In the present embodiment, the scroll casing 340 is disposed in the middle of the front and rear sides such that the side plates of the scroll casing 340 are parallel to the front and rear side plates of the fan case 300. By arranging the volute 340 in the middle of the fan case 300, when the air flows into the fan case 300 from the silencer, the air flows uniformly from both sides of the volute 340, so that the air flows uniformly in the silencer; when noise generated by the fan assembly is transmitted into the silencer, the side walls around the silencer can be used for eliminating the noise uniformly, the utilization rate of the silencer is improved, and therefore the silencing effect is improved.

In order to protect the fan case 300 and the silencer, and to increase the overall sense and the aesthetic degree of the two, one end of the silencer, which is far away from the fan case 300, is connected with the top of the fume collecting hood of the range hood; the range hood further comprises a decorative cover, the bottom of the decorative cover is abutted with the bottom of the fume collecting hood, and the top of the decorative cover is flush with the top of the fan box 300.

The muffler 500, two ends of the muffler 500 are respectively provided with an air inlet 510 and an air outlet 520, and the air outlet 520 is communicated with the air inlet 310; the muffler 500 has a sound deadening passage 533 and a sound deadening chamber 534 communicating with the sound deadening passage 533; the air outlet 520 communicates with the sound attenuating passages 533 and/or the sound attenuating cavities 534.

In this embodiment, the silencing channel 533 and the silencing cavity 534 are isolated from each other, and only communicate through one or more small channels, so that noise can be consumed by being transmitted from the silencing channel 533 into the silencing cavity 534, or can be consumed by being transmitted from the silencing cavity 534 into the silencing channel 533, and the noise source needs to be transmitted in a mode and an azimuth according to actual situations.

Taking the example that noise is transmitted from the sound-deadening channel 533 into the sound-deadening chamber 534 as an example, the sound-deadening device 500 belongs to the resonance type sound-deadening device 500, and when noise is transmitted from the sound-deadening channel 533 into the sound-deadening chamber 534 through a fine channel, part of sound energy is converted into heat energy and dissipated due to the action of air viscosity and friction force of the inner wall of the hole; noise is transmitted within the sound attenuation chamber 534, and during the transmission, sound waves act on the wall plate of the sound attenuation chamber 534 to cause vibration; taking micro-holes 532 as an example, the micro-holes 532 and the silencing cavity 534 form a resonance sound absorption structure, each hole on the side wall of the cavity and the space behind the micro-holes form a corresponding Helmholtz resonator, under the condition of sound wave excitation and reflection, sound waves vibrate back and forth in the silencing cavity 534, and due to self internal friction and air friction, sound energy is converted into mechanical energy and then into heat energy to be consumed, and noise is reduced through the structure in a vibration mode.

The number of the positions of the silencing chamber 534 and the silencing channel 533 may be large, and the silencing chamber 534 may be located on one side of the silencing channel 533 or may be located around the silencing channel 533. The cross-sectional shape of the sound deadening passageway 533 may be many, such as circular, square, triangular, etc.

In this embodiment, under the action of a fan in the fan box 300, the fume collecting hood of the range hood gathers the fume generated in the cooking process, and enters the silencing channel 533 and/or the silencing cavity 534 through the air inlet 510 of the silencer 500, and then enters the box through the air outlet 520 and the air inlet 310 and is then discharged; in this process, the fan always works, and the generated noise enters the silencing channel 533 and/or the silencing cavity 534 from the air inlet 310 and after passing through the air outlet 520, and whether the noise is in the silencing channel 533 or the silencing cavity 534, the noise is finally weakened and consumed by the two silencing channels 533 and the silencing cavity 534 at the same time, and the noise is further consumed in the silencer 500 by the arrangement of the silencing cavity 534, so that the noise reduction effect of the silencer 500 is more obvious and effective, and the noise released by the range hood in the working process is greatly reduced.

In some embodiments, to further enhance the noise reduction effect of the muffler 500, the muffler 500 includes a housing 540 and a sound-deadening cylinder 530 disposed within the housing 540, the sound-deadening cylinder 530 being disposed along the length direction of the housing 540; the sound deadening cylinder 530 has a sound deadening passage 533, and the sound deadening chamber 534 is formed between the sound deadening cylinder 530 and the casing 540. The sound deadening cylinder 530 is provided in a cylindrical shape, and has a sound deadening passage 533 provided along its longitudinal direction. The cross-sectional shape of sound deadening cylinder 530 may be varied, such as circular, square, etc. The housing 540 is provided in a cylindrical shape, and is provided with a receiving chamber along a length direction thereof, and the silencing barrel 530 is installed in the receiving chamber such that a silencing chamber 534 is formed between a sidewall of the silencing barrel 530 and a sidewall of the housing 540. The silencing cavity 534 is arranged around the silencing channel 533 at this time, so that sound waves in the silencing channel 533 can enter the silencing cavity 534 from the periphery, and noise in the silencing channel 533 can be greatly reduced. After entering the silencing cavity 534 from the micro-holes 532, the sound wave of noise is repeatedly ejected in the silencing cavity 534 until the energy is completely converted into heat energy to be consumed.

The sound deadening passageway 533 and the sound deadening chamber 534 are communicated in many ways, for example, communication through the micro-holes 532, and the shape of the micro-holes 532 may be many, for example, square, oval, etc., for example, circular. Specifically, the side wall of the silencing barrel 530 is provided with a plurality of micropores 532 for communicating the silencing channel 533 with the silencing cavity 534. Both ends of the silencing barrel 530 are respectively communicated with the air inlet 510 and the air outlet 520, and noise at this time is transmitted into the silencing cavity 534 from the silencing channel 533. The two ends of the outer shell 540 are formed with connection flanges, the two ends of the silencing barrel 530 are formed with connection flanges 531, and the connection flanges are connected with the connection flanges 531 to enclose and form a silencing cavity 534 with two closed ends. The connection flange may extend into the cavity or extend outside the sound deadening cavity 534, and the connection flange may extend into the cavity to reduce the volume of the sound deadening 500. The connection flange 531 extends to the outside of the sound deadening channel 533, and is lap-jointed and fixed with the connection flange, thereby sealing both ends of the sound deadening chamber 534. The connection flange 531 and the connection flange can be fastened by screws or can be connected by welding. Through the arrangement of the connection flange 531 and the connection flange, the two ends of the silencing cavity 534 are sealed, so that noise is prevented from overflowing from the two ends of the silencing cavity 534.

In order to further improve the noise reduction effect of the muffler 500, the distance between the outer sidewall of the sound-deadening cylinder 530 and the inner sidewall of the housing 540 is 10 to 30mm. The aperture of the micropores 532 is 0.6-1 mm; and/or the wall thickness of the silencing pot 530 is 0.5-1 mm. The total area of the plurality of micro holes 532 is equal to 1% to 5% of the side area of the sound deadening cylinder 530. The thickness of the sound deadening chamber 534 (the distance between the outer side wall of the sound deadening cylinder 530 and the inner side wall of the casing 540), the wall thickness of the sound deadening cylinder 530, and the total area ratio of the micro holes 532 all affect the noise reduction effect of the muffler 500. Noise generated by the fan is within a certain frequency range, and noise reduction effect can be optimized by using corresponding parameters (structural characteristics) to eliminate noise of the frequency ranges, if the thickness of the silencing cavity 534, the aperture of the micro-hole 532, the hole depth of the micro-hole 532 and the area ratio occupied by the micro-hole 532 are too large or too small, the silencer 500 is not beneficial to eliminate noise of the sound wave frequency range generated by the fan.

In order to prevent sound waves from entering the sound-deadening chamber 534 and then bouncing into the sound-deadening channel 533 again, the hole diameters of the micro holes 532 gradually decrease from the sound-deadening channel 533 to the sound-deadening chamber 534. Meanwhile, the micro-holes 532 have the function of guiding sound waves into the sound deadening chamber 534 due to the taper of the aperture. By gradually reducing the aperture of the micro-hole 532 from the silencing channel 533 to the silencing cavity 534, the noise wave of the noise easily enters the silencing cavity 534, but is difficult to propagate from the silencing cavity 534, which is more beneficial to the consumption of the noise wave.

In order to further improve the noise reduction effect of the muffler 500, a noise reduction cotton is disposed in the noise reduction chamber 534. Through the setting of amortization cotton, the sound wave that enters into in the amortization chamber 534 will be more quick by the conversion heat energy to be favorable to follow-up sound wave more smooth and easy entering into in the amortization chamber 534 and convert, thereby be favorable to improving the noise reduction effect of muffler 500.

In order to further improve the noise reduction effect of the muffler 500, the sidewall of the sound-deadening cylinder 530 includes an inner plate and an outer plate that are disposed at intervals to form a sound-deadening gap therebetween. The inner plate and the outer plate are fixedly connected, so that part of sound waves of noise are consumed in the silencing gap. Micropores 532 are formed in the inner plate and the outer plate, so that when sound waves pass through the silencing gap, part of the sound waves are consumed, the consumption capacity and consumption speed of the sound waves by the silencer 500 are improved, and the noise reduction effect of the silencer 500 is improved.

The fume collecting hood of the range hood is arranged below the silencer 500, the silencing channel 533 extends along the length direction of the silencing barrel 530, and the fume collecting hood fume outlet 120 is communicated with the silencing channel 533.

The adaptor assembly 900, the adaptor assembly 900 includes a connecting smoke pipe 930, one end of the connecting smoke pipe 930 is communicated with the air inlet 310, and the other end is communicated with the silencing channel 533. The connecting smoke pipe 930 may be formed by a plurality of forms, such as a hard plastic pipe, a metal pipe, a soft plastic pipe, a rubber pipe, etc., and only needs to connect the ventilator case 300 and the muffler 500. The connection pipe 930 includes a pleated plastic pipe and/or a pleated rubber pipe as an example.

During the installation of the fan assembly and the muffler 500, both the fan assembly and the muffler 500 need to be installed according to the actual situation of the user's house, for example, the fan box 300 is preferably installed near the smoke outlet, and the fan box 300 needs to be installed on a wall, while the muffler 500 needs to be installed on the wall, and also needs to be matched with the fume collecting hood below, so that the air outlet 520 of the muffler 500 is not collinear with the axis of the air inlet 310 of the fan box 300; through with the one end and the amortization passageway 533 intercommunication of connecting tobacco pipe 930, the other end communicates with air intake 310 for the fan subassembly and the produced actual deviation of muffler 500 in the installation can obtain effectual compensation, thereby make the installation under the multiple operating mode (room body condition) can be adapted to the range hood, thereby be favorable to improving the adaptability of range hood.

For better communication with the sound-deadening channel 533 and the air inlet 310 of the fan case 300, the smoke connection pipe 930 is flexible, and/or the smoke connection pipe 930 is telescopic. Through setting the connection tobacco pipe 930 to hose and flexible pipe for in the installation of range hood, the relative position between fan case 300 and the muffler 500 can be nimble regulation, in order to make the adaptation that range hood can be better different installation environment, improve the adaptability of range hood by a wide margin.

There are many ways to connect the fan case 300 to the muffler 500, and the connection is achieved by the fan adapter 700 and the adapter assembly 900 as described in detail below.

Specifically, the fan assembly includes a fan adapter 700, where the fan adapter 700 is disposed at the air inlet 310; the adaptor assembly 900 includes a fixing portion 920 and an adaptor 910 connected to the fixing portion 920, and the fixing portion 920 is connected to the muffler 500; one end of the connection smoke pipe 930 is connected to the adaptor 910, the other end is connected to the fan adaptor 700, and/or one end of the connection smoke pipe 930 is connected to the fixing portion 920, and the other end is connected to the adaptor 910. That is, the connection smoke pipe 930 may be disposed between the adaptor 910 and the fan adaptor 700 in various positions; or may be disposed between the fixing portion 920 and the adaptor 910, where the adaptor 910 may be directly connected to the fan adaptor 700, or may be connected through another connection smoke pipe 930 (i.e., two connection smoke pipes 930 are disposed between the fan adaptor 700 and the adaptor 910, and between the fixing portion 920 and the adaptor 910, respectively). The arrangement of the fan adapter 700 and the adapter 910 enables the installation of the connecting smoke pipe 930 to be more convenient and quicker; by the same token, the arrangement of the adapter 910 and the fixing portion 920 makes the installation of the connection flue 930 more convenient and faster. The connection smoke pipe 930 may be fastened by screws, or may be fastened by adhesive or ring fasteners, which are fastened to the connection smoke pipe 930 and the member to be fastened.

Wherein, the fan adapter 700 comprises a mounting edge 710 and a connecting part connected with the mounting edge 710; the connecting portion is detachably connected with the adapter 910, and the mounting edge 710 is fixedly connected with the bottom of the chassis. The connecting portion is provided in a cylindrical shape, and the mounting edge 710 is located at one end of the connecting portion, and the mounting edge 710 extends along the circumferential direction of the connecting portion. The mounting edge 710 may be detachably connected to the connecting portion, or may be integrally formed with the connecting portion. The mounting edge 710 is attached to the bottom of the fan case 300 at a position corresponding to the air inlet 310, so that the axis of the connecting portion is collinear with the axis of the air inlet 310. The mounting edge 710 may be attached to the inner wall of the fan case 300, or may be attached to the outer wall of the fan case 300.

In order to improve the tightness between the fan adapter 700 and the fan box 300, a sealing groove 311 is arranged at the bottom of the fan box 300 along the circumferential direction of the air inlet 310; the mounting edge 710 extends along the radial direction of the air inlet 310, and a sealing flange 720 is formed on the mounting edge 710, and the sealing flange 720 is mounted in the sealing groove 311. The seal groove 311 is formed by recessing the bottom of the fan case 300 into the fan case 300, the installation groove extends along the circumferential direction of the air inlet 310 to form a ring shape, and the seal flange 720 extends along the circumferential direction of the installation edge 710 to form a ring shape. When the sealing flange 720 is installed into the sealing groove 311, the sealing performance between the fan adapter 700 and the fan case 300 is increased.

In order to improve the tightness and the connection stability between the fan adapter 700 and the adapter 910, the adapter 910 has a mounting groove formed toward the connection portion, and the connection portion is detachably mounted in the mounting groove. Through the setting of mounting groove for the connection between connecting portion and the adaptor 910 receives the protection of mounting groove, thereby makes the external environmental factor be difficult to influence the connection of two, thereby is favorable to improving the stability of two connections.

The connecting part is connected in the mounting groove in a plurality of ways, such as by snap connection, screw fastening connection and the like, taking threaded connection as an example (the mounting groove is convenient to detach and mount while the sealing performance is improved), the mounting groove is in an annular arrangement, the inner side wall of the connecting part is provided with inner threads, and/or the outer side wall of the connecting part is provided with outer threads; the connecting part is connected with the side wall of the mounting groove through threads. That is, the threads may be formed on the outer side wall of the connection portion, or on the inner side wall of the connection portion, or even on both the outer side wall and the inner side wall of the connection portion in some embodiments.

In order to further improve the tightness between the fan adapter 700 and the adapter 910, a sealing groove 917 with a downward opening is formed on the inner side wall of the connecting part; the mounting groove is formed by connecting and enclosing an inner annular wall and an outer annular wall, a sealing convex rib 915 is arranged at the top of the inner annular wall, and the sealing groove 917 is buckled on the sealing convex rib 915. The sealing bead 915 is a tight fit with the sealing groove 917.

The inner side wall of the connecting portion is formed with a folded edge 915 extending toward the inside thereof, and the folded edge 915 encloses with the inner side wall below the folded edge to form a sealing groove 917, and the shape of the sealing groove 917 may be various, such as rectangular, trapezoidal, etc. The inner annular wall top of mounting groove is provided with upwards extending seal protruding muscle 915, seal protruding muscle 915's shape and seal concave seal groove's shape adaptation to seal muscle's height is less than or equal to seal groove 917's groove depth, in order to guarantee tight fit between seal protruding muscle 915 and the seal groove 917 and connect, thereby effectual assurance between the two leakproofness.

The mounting grooves are formed in a plurality of ways, and can be formed by processing a thicker annular plate or by sleeving and matching two annular plates which are mutually independent, and in some embodiments, the mounting grooves can be formed by splicing left and right and splicing up and down in addition to splicing the inner and outer parts. In order to facilitate the processing of the inner structure of the installation groove, the installation groove is exemplified by the inner ring plate 911 and the outer ring plate 912.

The adaptor 910 includes an inner ring plate 911 and an outer ring plate 912, a clamping buckle 913 is provided on an inner side wall of the outer ring plate 912 and/or an outer side wall of the inner ring plate 911, and the inner ring plate 911 and the outer ring plate 912 are tightly matched through the clamping buckle 913. The snap fastener 913 may be formed in a variety of locations, such as the outer side wall of the inner ring plate 911, the inner side wall of the outer ring plate 912, or both. The number of the locking buckles 913 is plural, and the locking buckles are uniformly distributed along the circumferential direction of the inner ring plate 911 or the outer ring plate 912.

In order to improve the stability of the engagement of the clamping buckle 913, when the clamping buckle 913 is disposed at the bottom of the outer sidewall of the inner ring plate 911, a stop rib 914 is disposed at the bottom of the inner sidewall of the outer ring plate 912, and the stop rib 914 is disposed under the clamping buckle 913. The stop ribs 914 may be disposed only corresponding to the fastening buckles 913, or may be disposed along the circumferential direction of the outer ring plate 912, so as to adapt to the mating positions between the inner ring plate 911 and the outer ring plate 912, thereby being beneficial to improving the installation efficiency of the inner ring plate 911 and the outer ring plate 912.

Regarding the specific connection of the connection smoke tube 930, in order to improve the stability and the tightness of the cooperation of the connection smoke tube 930 and the fixing portion 920, a lateral flange 932 is formed at the bottom of the connection smoke tube 930 along the radial direction thereof, the fixing portion 920 includes a fixing plate, and the lateral flange 932 is attached to and fixed with the fixing plate. There are various ways of connecting the fixing plate and the lateral flange 932, such as screw connection and snap connection, for example, adhesive connection. By attaching the fixing plate and the lateral folded edge 932, the connection between the connecting smoke tube 930 and the fixing plate is surface connection, which is beneficial to improving the sealing performance and the stability of connection.

In order to improve the stability and the tightness of the fit between the connecting smoke tube 930 and the adapter 910 and the muffler 500, the top of the muffler 500 is provided with a connecting flange 531, the fixing plate is fixedly connected with the connecting flange 531, and the transverse flange 932 is located between the connecting flange 531 and the fixing plate. By sandwiching the lateral flap 932 between the connecting flap 531 and the fixing plate, the mounting stability of the lateral flap 932 is greatly improved.

In order to improve the sealing performance and the connection stability between the connection smoke pipe 930 and the adapter 910, a vertical flange 931 is formed at the top of the connection smoke pipe 930 along the axial direction thereof, and the vertical flange 931 is connected with the bottom of the inner ring plate 911 of the adapter 910. The vertical folded edge 931 is attached to and fixed to the side wall at the bottom of the inner ring plate 911, and various connection modes of the inner ring plate 911 and the vertical folded edge 931 are provided, such as screw connection and snap connection, for example, adhesive connection. By attaching the inner ring plate 911 and the vertical folded edges 931, the connection between the connecting smoke pipe 930 and the inner ring plate 911 is surface connection, which is beneficial to improving the sealing performance and the stability of connection.

The sound-proof housing 600, the sound-proof housing 600 includes a fan adapter 700 and a noise reduction component 610, the fan adapter 700 has an air passage 730 communicated with the air inlet 310, and the noise reduction component 610 is disposed in the air passage 730 to block the transmission of noise generated by the fan.

It should be noted that, the fan adapter 700 in this embodiment may have the same structure as the fan adapter 700 in the previous embodiment, or may be different from the fan adapter 700 in the previous embodiment, that is, the fan adapter 700 in this embodiment may have no adapter function and only provides an installation position for the noise reduction assembly 610.

Of course, in some embodiments, in order to simplify the design of the range hood and make more reasonable use of space, the noise reduction assembly 610 may be installed in the fan adapter 700 in the above embodiments to form the soundproof cover 600. When so configured, the connection between the sound insulation cover 600 and the chassis and adapter assembly 900 is the same as in the above embodiments, and will not be described again.

Under the action of a fan in the fan box 300, the fume collecting hood of the range hood gathers the fume generated in the cooking process, enters the machine box through the sound insulation cover 600 and the air inlet 310 and is discharged; in this process, the fan is always working, and the noise generated by the fan is transmitted into the air passage 730 of the fan adapter 700 from the air inlet 310, and then is transmitted into the components of the range hood below the sound-proof cover 600 after passing through the noise reduction assembly 610; through the arrangement of the sound insulation cover 600, when noise passes through the wind passage 730, the noise is greatly consumed under the action of the noise reduction assembly 610, so that the noise released by the range hood in the working process is greatly reduced; in addition, since the sound-proof housing 600 is directly connected with the fan box 300, the sound-proof housing 600 is very close to the noise source, so that noise is weakened and consumed at the source, the noise is effectively prevented from being diffused and spread, and the noise released by the range hood in the working process is further reduced.

The following structure specifically receives the noise reduction assembly 610

The noise reduction assembly 610 includes a support frame 611 and a noise reduction sheet 612 disposed on the support frame 611, where the support frame 611 is connected to the fan adapter 700. The supporting frame 611 is fixedly connected with the inner side wall of the air passage 730, the number of the noise reduction sheets 612 is plural, and the noise reduction sheets 612 are arranged along the radial direction of the supporting frame 611. By the arrangement of the noise reduction piece 612, noise is blocked by the noise reduction piece 612 when the noise is transmitted out of the chassis, thereby reducing noise transmitted to a user.

In order to further improve the sound insulation effect and reduce the loss of wind energy, the soundproof cover 600 has a leeward side opposite to the windward side, the leeward side being disposed toward the fan case 300; the noise reduction sheet 612 extends from the middle of the wind passage 730 to the side wall in the direction from the leeward side to the windward side. Regarding the shape and arrangement of the noise reduction sheets 612, a plurality of arc noise reduction sheets may be arranged along the circumferential direction of the wind channel 730, and gaps may be formed between adjacent arc noise reduction sheets, or no gaps may be formed between adjacent arc noise reduction sheets; the noise reduction sheet 612 may also be in an annular arrangement, specifically, the noise reduction sheet 612 is in an annular horn arrangement, and the noise reduction sheet 612 is in a divergent arrangement along a direction from the leeward side to the windward side. So configured, the upward flow of air from muffler 500 is smoothly directed into fan case 300, while noise emanating from fan case 300 is effectively blocked and bounced by noise reduction sheet 612.

In order to increase the number and total area of the noise reduction pieces 612 in a certain space, the noise reduction pieces 612 are arranged in a step along the length direction of the wind passage 730. The radial dimension of the noise reduction tabs 612 increases gradually from the windward side to the leeward side, i.e., the diameter of the top noise reduction tab 612 is greater than the diameter of the lower noise reduction tab 612. So set up, when increasing the piece 612 total area of making an uproar, form a sunken groove in leeward side, when the noise propagates to the inslot, can be bounced and gathering to faster consumed, be favorable to improving the noise reduction effect. In order to simplify the manufacturing process steps of the noise reduction assembly 610 and improve the overall strength of the noise reduction member, the noise reduction sheet 612 is integrally formed with the supporting frame 611.

In order to improve the noise reduction effect, a concave cambered surface is formed on a side of the supporting framework 611 facing the air inlet 310. The supporting framework 611 includes a plurality of arc-shaped supporting pieces arranged along the radial direction of the air passage 730, and the intersection points of the supporting pieces are close to the axis of the air passage 730. When the sound waves of the noise are transmitted to the concave cambered surface, the concave cambered surface rebounds and gathers the noise, so that the interaction between the sound waves is generated and is quickly converted into heat energy, and the purpose of quickly and efficiently reducing the noise is achieved.

In some embodiments, to further block noise discharged from the muffler 500, while improving the overall aesthetic appearance of the range hood; the range hood further comprises a decorative cover 200, wherein the decorative cover 200 is covered on the outer sides of the muffler 500 and the fan case 300, one end of the decorative cover is flush with the top of the fan case 300, and the other end of the decorative cover is connected with the top of the fume collecting hood.

It should be noted that the relationship among the fume collection hood, the fan assembly and the respective vents of the noise reducer is as follows: the fume collecting hood 100 has a fume inlet 110 and a fume outlet 120; the fan assembly is arranged above the fume collecting hood 100, the fan assembly comprises a fan box 300, the fan box 300 is provided with an air inlet 310 and an air inlet 310, and the air inlet 310 is positioned on the side wall of the fan box 300; the noise reducer is provided with a silencing channel 533 which is arranged in a cylindrical shape, and two ends of the noise reducer are provided with an air inlet 510 and an air outlet 520 which are communicated with the silencing channel 533; the noise reducer is arranged between the fume collecting hood 100 and the fan box 300, the air inlet 510 is communicated with the fume outlet 120, and the air outlet 520 is communicated with the air inlet 310

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A range hood, comprising:

the fan box is provided with an air inlet and an air outlet, and the air outlet is positioned on the side wall of the fan box;

the fan comprises a volute and a wind wheel, the wind wheel is arranged in the volute, the volute is vertically arranged in the fan box, an air suction inlet of the volute faces to the side wall of the fan box, and an air supply outlet of the volute faces to the air outlet;

the lower part of spiral case is provided with the lower carriage, the lower carriage keep away from the one end of spiral case with fan case fixed connection, the lower carriage include with spiral case fixed connection's base plate, fixed plate and connection base plate and fixed plate's linking arm, the cross section of linking arm sets up into the V font, the pointed end of linking arm is towards the air intake.

2. The range hood of claim 1, wherein an upper bracket is provided at a top of the scroll casing, and an end of the upper bracket remote from the scroll casing is fixedly connected with the fan box.

3. The range hood of claim 2, wherein the upper bracket includes a hanging plate having a U-shape, one end of the hanging plate is attached to the side plate of the scroll case, and a middle plate of the hanging plate is attached to the top of the case.

4. The range hood of claim 1 wherein the base plate is fixedly connected to the volute, and the fixed plate is fixedly connected to the side wall of the fan case in a fitting manner.

5. The range hood of claim 4, wherein the bottom of the connecting arm is fixedly connected to the bottom of the fan case.

6. The range hood of claim 5, wherein the top of the connecting arm is provided with a mounting groove, and the bottom of the mounting groove is connected with the bottom of the fan box through a fastener.

7. The range hood according to any one of claims 1 to 6, further comprising a muffler having an air inlet, an air outlet, and a muffler channel communicating the air inlet and the air outlet, the air outlet communicating with the air inlet;

8. The range hood of claim 7 wherein an end of the muffler remote from the blower housing is connected to a top of a fume collection hood of the range hood;