CN212841780U - Smoke collecting hood and range hood - Google Patents

Abstract

The utility model provides a collection petticoat pipe and range hood. Wherein, collection petticoat pipe includes: the exhaust fume collecting hood comprises a fume collecting hood body, wherein a first channel is arranged in the fume collecting hood body; the noise reduction assembly is at least partially arranged in the first channel and forms a first silencing channel with the wall surface of the first channel in a surrounding manner; the first air inlet is formed in the smoke collecting hood body and communicated with the first silencing channel. Through setting up the at least part of subassembly that makes an uproar in first passageway that makes an uproar for the subassembly that makes an uproar can enclose jointly with the wall of first passageway and close and form first amortization passageway, and make first air intake and first amortization passageway intercommunication. Even if the fume collecting hood absorbs fume through the first silencing passage with the silencing function, most of noise generated by the operation of a fan of the range hood can be effectively prevented from being transmitted outwards through the fume absorbing passage, and the noise generated by the operation of the whole range hood using the fume collecting hood is reduced.

Description

Smoke collecting hood and range hood

Technical Field

The utility model relates to a kitchen equipment technical field particularly, relates to a collection petticoat pipe and a range hood.

Background

The cigarette machine product is widely concerned by users as a household appliance product necessary for modern families. The range hood mainly comprises a centrifugal fan and an oil fume suction channel, wherein the centrifugal fan is usually positioned in a rack of the range hood and is hidden in a cabinet. In order to ensure that the range hood has a good oil fume suction effect, the air quantity of the centrifugal fan is increased generally, but the method can greatly increase the noise caused by the operation of the centrifugal fan, so that the range hood in the related technology has larger movement noise.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to at least one of the problems of the prior art or the related art.

Therefore, the first object of the present invention is to provide a smoke collecting hood.

A second object of the present invention is to provide a range hood.

In view of this, the embodiment of the first aspect of the present invention provides a smoke collecting hood, including: the exhaust fume collecting hood comprises a fume collecting hood body, wherein a first channel is arranged in the fume collecting hood body; the noise reduction assembly is at least partially arranged in the first channel and forms a first silencing channel with the wall surface of the first channel in a surrounding manner; the first air inlet is formed in the smoke collecting hood body and communicated with the first silencing channel.

The utility model provides a collection petticoat pipe, including collection petticoat pipe body, fall subassembly and the first air intake of making an uproar, wherein, this internal first passageway that is provided with of collection petticoat pipe. Through setting up the at least part of subassembly that makes an uproar in first passageway that makes an uproar for the subassembly that makes an uproar can enclose jointly with the wall of first passageway and close and form first amortization passageway, and make first air intake and first amortization passageway intercommunication. The fume is also sucked even if the fume collecting hood passes through the first silencing passage having the silencing function. The range hood can effectively prevent most of noise generated by the operation of a fan of the range hood from being transmitted outwards through the range hood channel, and reduce the noise generated by the operation of the whole range hood using the fume collecting hood.

In the related art, because the fan of the range hood is positioned in the rack and hidden in the cabinet, only a small part of noise generated by the fan is transmitted to the outside through the shell of the rack and the cabinet; most of the noise is transmitted to the ears of the user through the oil smoke suction channel of the range hood. While the main function of the oil smoke suction channel in the related art is to provide a specific flow path for the oil smoke, the design is only to consider the convenience of the user for cleaning or to reduce the flow resistance of the channel. And the utility model discloses a design the collection petticoat pipe, set up the subassembly of making an uproar that falls in the first passageway of collection petticoat pipe, make the subassembly of making an uproar that falls as the partly of the wall of first amortization passageway, fall and make an uproar, most noise that can effectively avoid range hood's fan operation to produce passes through the outside transmission of oil absorption cigarette passageway, reduces the holistic running noise of range hood.

Additionally, according to the utility model discloses above-mentioned technical scheme provides a collection petticoat pipe still has following additional technical characterstic:

in one possible design, the first muffling channel comprises: at least one first section channel; the first section of channel and the second section of channel are alternately distributed in the height direction of the smoke collecting hood body; the first datum line is made along the height direction of the smoke collecting hood body, and the section area, perpendicular to the first datum line, of any one second section of channel is smaller than the section area, perpendicular to the first datum line, of the adjacent first section of channel.

In this design, the structure of the first sound-deadening passage is specifically defined. The first sound-deadening passageway includes at least one first-stage passageway and at least one second-stage passageway. The first datum line is made along the height direction of the smoke collecting hood body, and the cross section area, perpendicular to the first datum line, of any one second-section channel is smaller than that of the adjacent first-section channel, namely, each second-section channel is thin relative to the adjacent first-section channel. And the first section of channel and the second section of channel are alternately distributed in the height direction of the smoke collecting hood body, namely the first silencing channel is continuously changed in thickness in the height direction. The thicker second section channel can realize the silencing effect of the expansion cavity relative to the thinner first section channel, so that sound waves can enter the thicker first section channel and then enter the other thinner second section channel after entering the thinner second section channel in the process of being propagated in the first silencing channel. On one hand, the sound wave is reflected by the changed cross section of the silencing channel, so that the sound wave is reflected to the sound source, the reflected sound wave is weakened to the sound wave which is not reflected, and the noise is reduced. On the other hand, after sound waves with different frequencies enter the first section of channel with a larger cross section, especially enter the cavity body of the first section of channel expanded relative to the second section of channel, most of the sound waves are reflected and consumed in the expanded cavity body, and only a small part of the sound waves with different frequencies can be transmitted out to enter the next section of channel, so that the noise reduction effect is achieved.

It should be noted that each first section channel and each second section channel have a plurality of cross sections perpendicular to the first reference line, and the cross section areas of the second section channels may be the same or different; the cross-sectional area of each first stage channel may be the same or different throughout. The cross-sectional area of the second section of the passageway perpendicular to the first reference line being less than the cross-sectional area of the first section of the passageway perpendicular to the first reference line, meaning that any of the cross-sectional areas of the second section of the passageway is less than any of the cross-sectional areas of the first section of the passageway.

In one possible design, the number of the first-stage passages is multiple, the cross-sectional areas of the multiple first-stage passages perpendicular to the first reference line are the same or different, and the heights of the multiple first-stage passages are the same or different.

In this design, in the case where the number of the first-stage passages is plural, the machining of the first muffling passage is facilitated by making the sectional areas of the plural first-stage passages perpendicular to the first reference line the same, and/or making the heights of the plural first-stage passages the same. The sectional areas, perpendicular to the first datum line, of the first sections of the channels are different, and/or the heights of the first sections of the channels are different, so that sound waves with different frequencies can be silenced, the sectional areas and the heights of the first sections of the channels can be designed correspondingly for the sound waves with different frequencies generated by the fan, and the noise reduction effect is improved.

Wherein, it should be noted that the height direction of the first section of the channel is the same as the height direction of the fume collecting hood body. And the height direction of the fume collecting hood body is the height direction of the fume collecting hood in the normal use process.

In one possible design, the number of the second-stage passages is multiple, the cross-sectional areas of the multiple second-stage passages perpendicular to the first reference line are the same or different, and the heights of the multiple second-stage passages are the same or different.

In the design, under the condition that the number of the second section channels is multiple, the sectional areas of the second section channels, which are perpendicular to the first datum line, are the same, and/or the heights of the second section channels are the same, so that the first silencing channel is convenient to process, the oil smoke is convenient to smoothly suck the range hood, and the range hood is not interfered too much. And the cross-sectional areas perpendicular to the first datum line of the second section channels are different, and/or the heights of the second section channels are different, so that the first section channels can expand cavities with different sizes relative to the two adjacent second section channels, and sound waves with different frequencies can be silenced.

Wherein, it should be noted that the height direction of the second section channel is the same as the height direction of the fume collecting hood body.

In one possible design, a noise reduction assembly includes: the first expansion chambers are distributed at intervals in the height direction of the smoke collecting cover body; at least a portion of each first expansion chamber is configured as part of one of the first length of channels.

In this design, the noise reduction assembly is specifically defined to include a plurality of expansion chambers, and the expansion portion of the first sound-deadening passage is realized by the first expansion chambers by configuring at least a portion of each of the first expansion chambers as a portion of one of the first-stage passages, that is, by configuring at least a portion of a wall surface of each of the first expansion chambers as a portion of a wall surface of one of the first-stage passages, so that the noise reduction effect is good.

In one possible design, the noise reduction assembly includes a plurality of first protrusions that are spaced apart on a wall surface of the first passage in a height direction of the hood body. The wall surface of the first channel between two adjacent first projections is configured as at least a part of the wall surface of one first-stage channel. The end of each first projection is configured as at least a portion of a wall of one of the second length of channels.

In this design, specifically, the noise reduction assembly includes a plurality of first protrusions, and the top end of each first protrusion forms at least a part of the wall surface of one second-stage channel by distributing the plurality of first protrusions on the wall surface of the first channel at intervals along the height direction of the exhaust fume collecting hood body, and making the wall surface of the first channel between two adjacent first protrusions form at least a part of the wall surface of one first-stage channel. That is, the wall surface of the first channel is provided with a plurality of first bulges to realize the alternate thickening and thinning of the first silencing channel, the structure is simple, and the processing is convenient. Moreover, the protruding height of the first protruding part is conveniently designed, so that the cross section area of the second section of channel can be adjusted.

Further, in the case where the noise reduction assembly includes a plurality of first expansion chambers, one first expansion chamber may be formed by two adjacent first protrusions being commonly enclosed with the wall surface of the first passage between the two adjacent first protrusions.

In one possible design, the noise reduction assembly includes a plurality of first shrouds, the plurality of first shrouds being spaced apart along the height of the fume collecting hood body on the wall surface of the first passage. A first opening is formed between two adjacent first enclosing plates, and the wall surface of the first channel corresponding to the first opening in the horizontal direction is constructed into at least one part of the wall surface of the first section of channel. Each first shroud is configured as part of a wall of one of the second length of channels.

In this design, the noise reduction assembly is specifically defined to include a plurality of first shrouds. Through making a plurality of first bounding walls along the direction of height interval distribution of collection petticoat pipe body on the wall of first passageway for have certain expanded space between two adjacent first bounding walls. The first opening is formed between the two connected first enclosing plates, the expansion space is communicated through the first opening, the wall surface of the first channel corresponding to the first opening in the horizontal direction is constructed into at least one part of the wall surface of the first section of channel, and the position of the first opening is the position of the first section of channel. The existence of the expanded space increases the cross-sectional area of the first section of channel, and is beneficial to the reflection consumption of the sound waves in the expanded space. Each first enclosing plate forms a part of the wall surface of one second section of channel, and the first section of channel and the second section of channel are alternately distributed. In particular, the first opening may be sized to adjust the height of the first section of passage.

Wherein, the horizontal direction is the direction perpendicular to the height direction of collection petticoat pipe.

Further, in the case where the noise reduction assembly includes a plurality of first expansion chambers, one first expansion chamber may be formed by the co-enclosure of two adjacent first shrouds and the wall surface of the first passage. The first expansion chamber is communicated with the second section of channel through a first opening between two adjacent first enclosing plates.

In one possible design, in the height direction of the fume collecting hood body, the height of each first opening is greater than or equal to one fourth of the height of the first expansion chamber in which the first opening is located.

In the design, the height of each first opening is larger than or equal to one fourth of the height of the first expansion chamber where the first opening is located, so that sound waves can conveniently enter the first expansion chamber, and the noise reduction effect is good. Moreover, the oil fume can not generate larger obstruction to the air flow, and is favorable for the oil fume to flow rapidly in the first silencing channel.

In one possible design, a noise reduction assembly includes: at least one first perforated plate is arranged in the first channel, and each first perforated plate extends in the height direction of the smoke collecting cover body.

In this design, the noise reduction assembly is specifically defined to include at least one first perforated plate. By configuring the at least one first perforated plate as part of the wall surface of the first sound-deadening channel, noise reduction through the perforations in the first perforated plate is facilitated, and noise reduction of prominent monochromatic noise is particularly facilitated.

In one possible design, the number of first perforated plates is multiple. The second datum line is made along the height direction of the smoke collecting cover body, and the first perforated plates are distributed at intervals in the extending direction of the section, perpendicular to the second datum line, of the first silencing passage. The sound waves can be weakened through the first perforated plates of the multiple layers, and the noise reduction effect is good.

In one possible design, one end of the at least one first perforated plate is arranged on the first wall surface of the first channel; an included angle is formed between the at least one first perforated plate and the first wall surface of the first channel.

In this design, the one end of specifically injecing at least one first perforated plate sets up in the first wall of first passageway, through making at least one first perforated plate and the first wall of first passageway have the contained angle between, if make the first wall of first passageway extend for the direction of height slope of collection petticoat pipe body, make at least one first perforated plate deviate from one side of first amortization passageway and have the amortization chamber, make at least one first perforated plate whole deviate from one side of first amortization passageway each department have different chamber depths, be favorable to weakening the sound wave of different frequencies, realize wide band noise reduction effect.

Further, a first sound-deadening chamber is formed on one side of the at least one first perforated plate, which is away from the first sound-deadening channel.

In one possible design, the noise reduction assembly further includes: and the silencing material is arranged in the first silencing cavity. Through set up amortization material in first amortization intracavity, further improve noise reduction effect.

In particular, the sound attenuating material is a porous sound absorbing material.

In one possible design, the fume collecting hood body includes: a back plate; the first side plate and the back plate are distributed oppositely, a first channel is formed between the first side plate and the back plate, and the first air inlet is formed in the first side plate.

In this design, the fume collecting hood body is specifically defined to include a back panel and a first side panel. Through making and form first passageway between first curb plate and the backplate to make first air intake setting on first curb plate, be favorable to realizing the side direction oil absorption cigarette function of collection petticoat pipe.

Further, at least part of the noise reduction assembly is disposed on the first side plate. The noise reduction assembly is convenient to install, and the noise reduction assembly can be arranged on the first side plate firstly and then installed. Moreover, because the back plate is generally flat, the noise reduction assembly is arranged on the first side plate, so that the airflow can flow fast along the flat back plate, the oil fume suction efficiency is ensured, and the noise is reduced by flowing through the noise reduction assembly. In addition, because the position air current velocity of flow that first passageway is close to first curb plate is very low, and the position that first curb plate is close to first air intake still can form the vortex moreover, belongs to the dead zone region of air current, consequently, sets up in first curb plate through the at least part that will fall the noise assembly, occupies the dead zone region of air current, can not cause very big interference to the velocity of flow of oil smoke, can be when not influencing oil absorption cigarette effect, noise reduction.

In one possible design, the fume collecting hood body further includes: the first top plate is arranged on one side of the first side plate, which is far away from the back plate; and the second air inlet is arranged on the first top plate.

In this design, specifically make collection petticoat pipe body still include first roof, through set up the second air intake on first roof, be favorable to realizing the top smoking function of collection petticoat pipe.

Furthermore, the first top plate is connected with the first side plate, and even the first top plate and the first side plate are integrally formed.

In one possible design, the fume collecting hood body further includes: the connecting plate is connected with the first top plate, the connecting plate and the first side plate are distributed on two opposite sides of the first top plate, and a second channel is formed between the connecting plate and the back plate. A portion of the noise reduction assembly is disposed within the first channel; the other part of the noise reduction assembly is arranged in the second channel and is enclosed with the wall surface of the second channel to form a second silencing channel, and the second air inlet is communicated with the second silencing channel.

In this design, specifically prescribe that collection petticoat pipe body still includes the connecting plate, because first roof setting deviates from one side of backplate at first curb plate, and the connecting plate distributes in the both sides that first roof is relative with first curb plate, can make and form the second passageway between connecting plate and the backplate. Thereby being beneficial to the oil smoke to enter the range hood through the second air inlet and the second channel. In addition, still set up in the second passageway through making the partly of making the subassembly of making an uproar that falls for the subassembly of making an uproar can enclose with the wall of second passageway and close and form second amortization passageway, and make the second air intake specifically and second amortization passageway intercommunication, make the collection petticoat pipe can carry out the top oil absorption cigarette through the second amortization passageway that has the function of making an uproar that falls, further improve the noise reduction effect of collection petticoat pipe.

In one possible design, the noise reduction assembly further comprises a partition plate, and the partition plate is arranged on the first top plate and extends into the first channel; one side of the partition plate facing the connecting plate is configured as a part of a wall surface of the second sound deadening passage; the side of the partition plate facing the back plate is configured as a part of the wall surface of the first sound-deadening passage.

In this design, still include the division board through making the subassembly of making an uproar that falls, separate this internal space of collection petticoat pipe for the division board extends to the second passageway from first passageway, can effectively avoid the air current to appear the confusion in the intercommunication department of first passageway and second passageway, improves noise reduction.

Moreover, since the partition plate is provided on the first top plate and extends into the first passage, the side of the partition plate facing the connecting plate is configured as a part of the wall surface of the second sound-deadening passage, and the side of the partition plate facing the back plate is configured as a part of the wall surface of the first sound-deadening passage, it is advantageous to change the structure of the partition plate, thereby changing the structures of the first sound-deadening passage and the second sound-deadening passage. For example, the thickness of the first silencing passage and the second silencing passage is changed by bending the partition board, so that the noise reduction effect is improved.

In one possible design, the second sound-deadening channel includes: at least one third section channel; at least one fourth section of channel, wherein the third section of channel and the fourth section of channel are alternately distributed in the height direction of the smoke collecting hood body; the third datum line is made along the height direction of the smoke collecting cover body, and the section area, perpendicular to the third datum line, of any one fourth section of channel is smaller than the section area, perpendicular to the third datum line, of the adjacent third section of channel.

In this design, the structure of the second sound-deadening passage is specifically defined. The second muffling channel comprises at least one third-stage channel and at least one fourth-stage channel. By making the cross-sectional area of any one of the fourth-stage passages perpendicular to the third reference line smaller than the cross-sectional area of each of the third-stage passages perpendicular to the third reference line, all the fourth-stage passages are thin relative to the third-stage passages. And the third section of channel and the fourth section of channel are alternately distributed in the height direction of the smoke collecting hood body, namely the second silencing channel is continuously changed in thickness in the height direction. The thicker fourth section channel can realize the silencing effect of the expansion cavity relative to the thinner third section channel, so that sound waves can enter the thicker third section channel after entering the thinner fourth section channel in the process of being transmitted in the second silencing channel. On one hand, the sound wave is reflected by the changed cross section of the silencing channel, so that the sound wave is reflected to the sound source, the reflected sound wave is weakened to the sound wave which is not reflected, and the noise is reduced. On the other hand, after sound waves with different frequencies enter a third section of channel with a larger cross section, especially enter a cavity formed by expanding the third section of channel relative to the fourth section of channel, most of the sound waves are reflected and consumed in the expanded cavity, and only a small part of the sound waves with different frequencies can be transmitted into the next section of the fourth section of channel, so that the noise reduction effect is achieved.

It should be noted that each third-stage passage and each fourth-stage passage have a plurality of cross sections perpendicular to the third reference line, and the cross section areas of the fourth-stage passages may be the same or different; the cross-sectional area of each third section of channel may be the same or different. The cross-sectional area of the fourth passage perpendicular to the third reference line is smaller than the cross-sectional area of the third passage perpendicular to the third reference line, meaning that any of the cross-sectional areas of the fourth passage is smaller than any of the cross-sectional areas of the third passage.

In one possible design, a noise reduction assembly includes: at least one second perforated plate, each second perforated plate positioned transversely within the second channel.

In this design, the noise reduction assembly is specifically defined to include at least one second perforated plate. By configuring the at least one second perforated plate as a part of the wall surface of the second sound-deadening channel, noise reduction through the perforations in the second perforated plate is facilitated, and noise reduction of a prominent monochromatic noise is facilitated in particular.

In one possible design, the first channel and the second channel communicate.

In this design, through making first passageway and second passageway intercommunication, be favorable to improving the smoking volume in collection cigarette chamber to be favorable to the collection petticoat pipe to inhale a large amount of oil smoke fast.

In one possible design, a portion of the at least one second perforated plate extends into the first channel and is angled relative to the first side plate.

In this design, stretch into first passageway through the partly that makes at least one second perforated plate to and have the contained angle between the first curb plate, make at least one second perforated plate deviate from one side of second amortization passageway and have the amortization chamber, make at least one second perforated plate wholly deviate from one side each department of second amortization passageway and have different chambeies deeply, be favorable to weakening the sound wave of different frequencies, realize the broadband noise reduction effect.

In a possible design, the noise reduction assembly further comprises a baffle plate disposed on a side of the at least one second perforated plate facing away from the second muffling channel, the baffle plate and the at least one second perforated plate enclosing a second muffling chamber.

In the design, the baffle is arranged on one side, away from the second silencing channel, of the at least one second perforated plate, so that the sound waves are blocked from being continuously transmitted to the back of the second perforated plate, the sound waves can be weakened in the space between the baffle and the second perforated plate, and noise reduction is realized.

In one possible design, the fume collecting hood further includes: the first flow guide piece is arranged in the first channel close to the first air inlet; and/or a second flow guide piece is arranged in the second channel close to the second air inlet.

In the design, the first flow guide part is arranged at the position, close to the first air inlet, in the first channel, so that the noise increase caused by the fact that the airflow forms a vortex near the first air inlet can be effectively avoided. The second guide piece is arranged at the position, close to the second air inlet, in the second channel, so that the phenomenon that the noise is increased due to the fact that the airflow forms a vortex nearby the second air inlet can be effectively avoided.

Further, the first flow guide part and the second flow guide part are provided with arc-shaped flow guide surfaces.

Further, the first flow guide piece is located between the first air inlet and the noise reduction assembly. Through making first water conservancy diversion spare occupy the region that is close to first air intake and easily forms the vortex, make the subassembly of making an uproar that falls occupy all the other air current dead zones and be connected with first water conservancy diversion spare, can improve noise reduction effect when not influencing the oil absorption cigarette effect.

Or further, the part of the noise reduction assembly close to the first air inlet is configured as a first flow guide.

Further, the second air guide piece is located between the second air inlet and the noise reduction assembly. The second flow guide part occupies an area close to the second air inlet and easy to form vortex, so that the noise reduction assembly occupies the rest airflow dead zone and is connected with the second flow guide part, and the noise reduction effect can be improved while the oil fume absorption effect is not influenced.

Or further, the part of the noise reduction assembly close to the second air inlet is configured as a second flow guide.

The embodiment of the second aspect of the utility model provides a range hood, include: the rack is internally provided with an accommodating cavity; the fan is arranged in the accommodating cavity; and as above-mentioned technical scheme any collection petticoat pipe, collection petticoat pipe is connected with the frame, first passageway with hold the chamber intercommunication.

The utility model discloses the range hood that the second aspect provided, including frame, fan and the collection petticoat pipe as above-mentioned any one in the technical scheme. Wherein, the fan sets up in the frame, and the fan rotates, absorbs inside the oil smoke gets into the frame through the collection petticoat pipe to get rid of range hood. The range hood has the smoke collecting hood of any one of the technical schemes, so that the range hood has the beneficial effects of any one of the technical schemes, and the description is omitted herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

Fig. 1 shows a schematic front view of a smoke collection hood of a first embodiment of the present invention;

FIG. 2 shows a schematic cross-sectional view in the direction A-A of FIG. 1;

figure 3 shows a schematic top view of a fume collection hood of a first embodiment of the invention;

fig. 4 shows a schematic structural diagram of a range hood according to a first embodiment of the present invention;

FIG. 5 shows a schematic cross-sectional view in the direction B-B in FIG. 4;

fig. 6 shows a schematic front view of a smoke collection hood according to a second embodiment of the present invention;

FIG. 7 shows a schematic cross-sectional view in the direction C-C of FIG. 6;

figure 8 shows a schematic top view of a fume collection hood according to a second embodiment of the invention;

fig. 9 is a schematic structural diagram of a range hood according to a second embodiment of the present invention;

FIG. 10 shows a schematic cross-sectional view in the direction D-D of FIG. 9;

fig. 11 shows a schematic front view of a smoke collecting hood of a third embodiment of the present invention;

FIG. 12 shows a schematic cross-sectional view in the direction E-E of FIG. 11;

FIG. 13 shows an enlarged partial schematic view at F of FIG. 12;

figure 14 shows a schematic top view of a fume collection hood according to a third embodiment of the invention;

fig. 15 shows a schematic structural diagram of a range hood according to a third embodiment of the present invention;

FIG. 16 shows a schematic cross-sectional view in the direction G-G of FIG. 15;

fig. 17 shows a schematic front view of a fume collecting hood of a fourth embodiment of the present invention;

FIG. 18 shows a schematic cross-sectional view in the direction H-H of FIG. 17;

FIG. 19 shows an enlarged partial schematic view at K of FIG. 18;

figure 20 shows a schematic top view of a fume collection hood according to a fourth embodiment of the invention;

fig. 21 is a schematic structural diagram of a range hood according to a fourth embodiment of the present invention;

fig. 22 shows a schematic cross-sectional view in the direction M-M of fig. 21.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 22 is:

100 a smoke collecting hood body, 101 a back plate, 102 a first side plate, 103 a first top plate, 104 a first air inlet, 105 a second air inlet, 106 a connecting plate, 110 a first silencing passage, 111 a first section passage, 112 a second section passage, 120 a second silencing passage, 121 a third section passage, 122 a fourth section passage, 210 a first expansion chamber, 211 a first protrusion, 212 a first enclosing plate, 213 a first opening, 220 a first perforated plate, 240 a second perforated plate, 241 a first silencing cavity, 242 a second silencing cavity, 250 a baffle, 260 a separating plate, 270 a first flow guide piece, 300 a rack, 310 an accommodating cavity and 400 a fan.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A smoke collecting hood and a range hood according to some embodiments of the present invention will be described with reference to fig. 1 to 22. Wherein, the directions of the double arrows in fig. 5, 10, 16 and 22 represent the height directions of the smoke collecting hood and the range hood, that is, the height directions of the smoke collecting hood and the range hood during the normal installation and use of the range hood.

The first embodiment is as follows:

as shown in fig. 2, 4 and 5, the fume collecting hood comprises a fume collecting hood body 100, a noise reduction assembly and a first air inlet 104 arranged on the fume collecting hood body 100. Wherein, be provided with first passageway in the collection petticoat pipe body 100. A part or all of the noise reduction assembly is disposed in the first channel, and the noise reduction assembly and the wall surface of the first channel enclose to form a first silencing channel 110 communicated with the first air inlet 104.

The embodiment provides a fume collecting hood, which comprises a fume collecting hood body 100, a noise reduction assembly and a first air inlet 104. Through setting up a part or all of noise reduction subassembly in first passageway for noise reduction subassembly can enclose jointly with the wall of first passageway and form first amortization passageway 110, and make first air intake 104 and first amortization passageway 110 communicate. The oil smoke is sucked even if the smoke collecting hood passes through the first silencing passage 110 having the silencing function. The range hood can effectively prevent most of noise generated by the operation of the fan 400 of the range hood from being transmitted outwards through the range hood channel, and reduce the noise generated by the operation of the whole range hood using the fume collecting hood.

In the related art, since the fan 400 of the range hood is located in the rack 300 and hidden in the cabinet, only a small portion of the noise generated by the fan 400 transmits sound to the outside through the housing of the rack 300 and the cabinet; most of the noise is transmitted to the ears of the user through the oil smoke suction channel of the range hood. While the main function of the oil smoke suction channel in the related art is to provide a specific flow path for the oil smoke, the design is only to consider the convenience of the user for cleaning or to reduce the flow resistance of the channel. And the utility model discloses a design the collection petticoat pipe, set up the subassembly of making an uproar that falls in the first passageway of collection petticoat pipe, make the subassembly of making an uproar that falls as the partly of the wall of first amortization passageway 110, fall and make an uproar, can effectively avoid the outside transmission of most noise that range hood's fan 400 operation produced through the oil absorption cigarette passageway, reduce the holistic running noise of range hood.

Example two:

on the basis of the first embodiment, as shown in fig. 5 and 7, the first silencing passage 110 is further defined to include a first passage section 111 and a second passage section 112. The number of the first stage channels 111 is at least one, and the number of the second stage channels 112 is at least one. The first-stage passages 111 and the second-stage passages 112 are alternately distributed in the height direction of the hood body 100. The first reference line is made along the height direction of the fume collecting hood body 100, so that the cross-sectional area of each second section passage 112 perpendicular to the first reference line is smaller than that of any first section passage 111 perpendicular to the first reference line.

In this embodiment, the structure of the first silencing passage 110 is specifically defined. First sound-deadening channel 110 includes at least one first-stage channel 111 and at least one second-stage channel 112. By making a first reference line along the height direction of the fume collecting hood body 100, the cross-sectional area of any one of the second-stage passages 112 perpendicular to the first reference line is smaller than that of the adjacent first-stage passage 111, that is, each second-stage passage 112 is thin relative to the adjacent first-stage passage 111. And is combined with the height direction of the smoke collecting cover body 100, so that the first section channel 111 and the second section channel 112 are alternately distributed, that is, the first silencing channel 110 is continuously varied in thickness in the height direction. The thicker second-section channel 112 can achieve the silencing effect of the expansion cavity relative to the thinner first-section channel 111, so that sound waves can enter the thicker first-section channel 111 and then enter the other thinner second-section channel 112 after entering the thinner second-section channel 112 in the process of propagating in the first silencing channel 110. On one hand, the sound wave is reflected by the changed cross section of the silencing channel, so that the sound wave is reflected to the sound source, the reflected sound wave is weakened to the sound wave which is not reflected, and the noise is reduced. On the other hand, after the sound waves with different frequencies enter the first section of channel 111 with a larger cross section, especially after the sound waves enter a cavity formed by expanding the first section of channel 111 relative to the second section of channel 112, most of the sound waves are reflected and consumed in the expanded cavity, and only a small part of the sound waves with different frequencies can be transmitted into the next section of second section of channel 112, so that the noise reduction effect is achieved.

It should be noted that each first section channel 111 and each second section channel 112 have a plurality of cross sections perpendicular to the first reference line, and the cross sectional areas of the respective parts of each second section channel 112 may be the same or different; the cross-sectional area of each first stage channel 111 may be the same or different. The cross-sectional area of second-stage passage 112 perpendicular to the first reference line is smaller than the cross-sectional area of first-stage passage 111 perpendicular to the first reference line, meaning that any of the aforementioned cross-sectional areas of second-stage passage 112 is smaller than any of the aforementioned cross-sectional areas of first-stage passage 111.

Further, making the sectional areas of the plurality of first-stage passages 111 perpendicular to the first reference line the same, and/or making the heights of the plurality of first-stage passages 111 the same, facilitates the machining of the first muffling passage 110. The sectional areas, perpendicular to the first reference line, of the first section channels 111 are different, and/or the heights of the first section channels 111 are different, so that sound waves with different frequencies can be silenced, and particularly, the sectional areas, perpendicular to the first reference line, and the heights of the first section channels 111 can be designed correspondingly for the sound waves with different frequencies generated by the fan 400, so that the noise reduction effect is improved. It should be noted that the height direction of the first-stage passage 111 is the same as the height direction of the smoke collecting hood body 100.

Further, the cross-sectional areas of the second section channels 112 perpendicular to the first reference line are the same, and/or the heights of the second section channels 112 are the same, so that the first silencing channel 110 can be conveniently machined, and the oil smoke can be conveniently and smoothly sucked into the range hood without being excessively disturbed. And the sectional areas of the second section channels 112 perpendicular to the first reference line are different, and/or the heights of the second section channels 112 are different, so that the first section channel 111 can expand cavities with different sizes relative to two adjacent second section channels 112, and sound waves with different frequencies can be silenced. It should be noted that the height direction of the second-stage passage 112 is the same as the height direction of the smoke collecting hood body 100.

Example three:

on the basis of the second embodiment, as shown in fig. 5 and 7, it is further defined that the noise reduction assembly includes at least one first expansion chamber 210, and at least a portion of one first expansion chamber 210 is configured as a portion of one first-stage passage 111. That is, at least a portion of the wall surface of each first expansion chamber 210 is configured as a portion of the wall surface of one first-stage passage 111, and the expansion portion of the first silencing passage 110 is realized by the first expansion chamber 210, so that the noise reduction effect is good.

Further, the number of the first expansion chambers 210 is plural, and the plural first expansion chambers 210 are spaced apart in the height direction of the hood body 100.

In a specific embodiment, as shown in fig. 5, the noise reduction assembly includes a plurality of first protrusions 211, and the plurality of first protrusions 211 are spaced apart in the height direction of the fume collecting hood body 100. Two adjacent first protrusions 211 and a part of the wall surface of the first channel between the two adjacent first protrusions 211 jointly enclose a first expansion chamber 210. The end of a first projection 211 forms at least a portion of the wall of a second channel segment 112.

In this embodiment, the noise reduction assembly specifically includes a plurality of first protrusions 211, and the first expansion chamber 210 is conveniently formed by distributing the plurality of first protrusions 211 on the wall surface of the first channel at intervals, and making two adjacent first protrusions 211 and the wall surface of the first channel between the two adjacent first protrusions 211 jointly enclose to form one first expansion chamber 210. Also, it is convenient to design the height of the first protrusion 211 to enable adjustment of the height of the second-stage channel 112.

In a specific application, the number of the first protrusions 211 is 2, or 3, or 5.

In another particular embodiment, as shown in FIG. 7, the noise reduction assembly includes a plurality of first shrouds 212. The plurality of first enclosing plates 212 are spaced apart in the height direction of the hood body 100. Any two adjacent first enclosing plates 212 and the wall surface of the first passage between the two first enclosing plates 212 together enclose a first expansion chamber 210. Any two adjacent first enclosing plates 212 have a first opening 213 therebetween, and the first opening 213 communicates the first extension chamber 210 and the second-stage channel 112. Facilitating the fabrication of the first expansion chamber 210. Furthermore, by having a first opening 213 between two adjacent first enclosing plates 212, such that the first expansion chamber 210 communicates with the second-stage channel 112 through the first opening 213, the first opening 213 can be sized to adjust the length of the first-stage channel 111.

In a specific application, the first enclosing plates 212 may be T-shaped, L-shaped or straight. The plurality of first enclosures 212 may have different shapes.

In a specific application, as shown in FIG. 7, the first enclosing plate 212 of the plurality of first enclosing plates 212, which is away from the first intake vent 104, is configured as a dividing plate 260. Extending the first enclosing plate 212 from the first channel to the second channel is advantageous in that the side of the first enclosing plate 212 facing the web 106 is configured as part of the wall surface of the second sound-deadening channel 120 and the side of the first enclosing plate 212 facing the back plate 101 is configured as part of the wall surface of the first sound-deadening channel 110. It is advantageous to configure both sides of one first shroud 212 as a portion of the wall of the second-stage channel 112 and a portion of the wall of the third-stage channel 121, or as a portion of the wall of the first-stage channel 111 and a portion of the wall of the fourth-stage channel 122.

Further, as shown in fig. 7, the height of each first opening 213 in the height direction of the hood body 100 is greater than or equal to one fourth of the height of the first extension chamber 210 in which it is located in the height direction of the hood body 100. The sound waves can conveniently enter the first expansion chamber 210, and the noise reduction effect is good. Moreover, the oil smoke will not be blocked greatly, which is beneficial to the oil smoke flowing fast in the first silencing channel 110.

In a specific application, the height of the first expansion chamber 210 close to the first intake vent 104 is greater than the height of the first expansion chamber 210 far from the first intake vent 104 in two adjacent first expansion chambers 210. For example, the number of the first extension chambers 210 is two, wherein the height of the first extension chamber 210 near the first intake vent 104 is 113mm, and the height of the first extension chamber 210 far from the first intake vent 104 is 71 mm.

Example four:

unlike the second and third embodiments, as shown in fig. 12, 13, 16, 18, 19 and 22, the noise reduction assembly includes a first perforated plate 220 disposed in the first duct, the first perforated plate 220 extending in the height direction of the hood body 100, and the number of the first perforated plates 220 is at least one.

In this embodiment, noise reduction through the perforations in the first perforated plate 220 is facilitated by configuring each first perforated plate 220 as a portion of the wall of the first sound-deadening passageway 110.

In a particular embodiment, as shown in fig. 12, 13, and 16, the noise reduction assembly includes a plurality of first perforated panels 220. A second reference line is made along the height direction of the hood body 100, and a plurality of first perforated plates 220 are spaced apart in the extending direction of the cross section of the first muffling passageway 110 perpendicular to the second reference line. The sound waves can be weakened through the multiple layers of the first perforated plates 220, and the noise reduction effect is good.

Further, as shown in fig. 12, one end of at least one first perforated plate 220 is disposed on a first wall surface of the first channel (i.e., an inner wall surface of the first side plate 102); at least one first perforated plate 220 is angled from the first wall of the first channel. If the first wall surface of the first passage extends obliquely relative to the height direction of the fume collecting hood body 100, one side of the at least one first perforated plate 220 departing from the first silencing passage 110 is provided with the first silencing cavity 241, and each position of one side of the at least one first perforated plate 220 integrally departing from the first silencing passage 110 is provided with different cavity depths, so that the acoustic waves with different frequencies can be weakened, and the broadband noise reduction effect can be realized.

Further, a side of the at least one first perforated plate 220 facing away from the first sound-deadening channel 110 is formed with a first sound-deadening chamber 241.

Further, the noise reduction assembly further includes a sound deadening material filled in the first sound deadening chamber 241. Further improving the noise reduction effect.

In a particular application, the sound attenuating material is a porous sound absorbing material.

Example five:

on the basis of any one of the above embodiments, as shown in fig. 1, 3, 4, and 5, the fume collecting hood body 100 is further defined to include a back plate 101 and a first side plate 102, the back plate 101 is distributed opposite to the first side plate 102, a first passage is formed between the back plate 101 and the first side plate 102, and the first air inlet 104 is disposed in the first side plate 102.

In this embodiment, the fume collecting hood body 100 is specifically defined to include a back panel 101 and a first side panel 102. Through making form first passageway between first curb plate 102 and the backplate 101 to make first air intake 104 set up on first curb plate 102, be favorable to realizing the side direction range hood function of collection petticoat pipe.

Further, as shown in fig. 5 and 7, at least a portion of the noise reduction assembly is disposed on the first side plate 102. The noise reduction assembly can be conveniently installed, and the first side plate 102 can be installed after the noise reduction assembly is arranged on the first side plate 102. Moreover, since the back plate 101 is generally flat, the noise reduction assembly is disposed on the first side plate 102, which facilitates the airflow to flow along the flat back plate 101 quickly, thereby ensuring the oil smoke absorption efficiency and reducing the noise by flowing through the noise reduction assembly. In addition, as can be known from CFD simulation or PIV experimental tests, the airflow velocity is very low at a position close to the first side plate 102 of the first passage, and a vortex is formed at a position close to the first air inlet 104 of the first side plate 102, which belongs to a dead zone region of the airflow. Therefore, at least a part of the noise reduction assembly is disposed on the first side plate 102, thereby occupying a dead zone area of the air flow, not greatly interfering with the flow velocity of the oil smoke, and reducing the noise without affecting the oil smoke absorption effect.

Example six:

on the basis of the fifth embodiment, as shown in fig. 1, 2, 3, 4, 6, 7, 8 and 9, the fume collecting hood body 100 is further defined to further include a first top plate 103 and a second air inlet 105 arranged on the first top plate 103. The top smoking function of the smoke collecting cover is realized.

Further, the first top plate 103 is connected to the first side plate 102, even if the first top plate 103 and the first side plate 102 are integrally formed.

Further, as shown in fig. 2, 5, 7 and 10, the included angle between the first top board 103 and the first side board 102 is an obtuse angle.

In a particular embodiment, as shown in fig. 1, 2, 5, 6, 7, 9, 11, 16, 17, and 22, the fume collecting hood body 100 further includes a connecting plate 106 connected to the first top plate 103, the first side plate 102 and the connecting plate 106 are distributed on opposite sides of the first top plate 103, and the connecting plate 106 and the back plate 101 form a second channel therebetween. A portion of the noise reduction assembly is disposed within the first channel; the other part of the noise reduction assembly is disposed in the second channel and encloses with the wall surface of the second channel to form a second silencing channel 120, and the second air inlet 105 is communicated with the second silencing channel 120.

In this embodiment, the fume collecting hood body 100 is further defined to include a connecting plate 106, and since the first top plate 103 is disposed on a side of the first side plate 102 facing away from the back plate 101, and the connecting plate 106 and the first side plate 102 are distributed on two opposite sides of the first top plate 103, a second passage can be formed between the connecting plate 106 and the back plate 101. Thereby being beneficial to the oil smoke to enter the range hood through the second air inlet 105 and the second channel. In addition, a part of the noise reduction assembly is arranged in the second channel, so that the noise reduction assembly can be enclosed with the wall surface of the second channel to form a second silencing channel 120, the second air inlet 105 is communicated with the second silencing channel 120, the top oil fume suction of the fume collecting hood can be carried out through the second silencing channel 120 with the noise reduction function, and the noise reduction effect of the fume collecting hood is further improved.

In a particular embodiment, as shown in fig. 2 and 5, the noise reduction assembly further includes a divider plate 260 disposed on the first top plate 103, the divider plate 260 extending into the first channel. The side of the partition plate 260 facing the connection plate 106 is configured as a part of the wall surface of the second sound-deadening passage 120; the side of the partition plate 260 facing the back plate 101 is configured as a part of the wall surface of the first sound-deadening passage 110.

In this embodiment, the noise reduction assembly further includes the partition plate 260 for partitioning the space inside the smoke collecting hood body 100, so that the partition plate 260 extends from the first passage to the second passage, thereby effectively avoiding the occurrence of disorder of the airflow at the communication position of the first passage and the second passage, and improving the noise reduction effect.

Moreover, since the partition plate 260 is provided on the first ceiling plate 103 and extends into the first passage, the side of the partition plate 260 facing the connecting plate 106 is configured as a part of the wall surface of the second sound-deadening passage 120, and the side of the partition plate 260 facing the back plate 101 is configured as a part of the wall surface of the first sound-deadening passage 110, it is advantageous to change the structure of the partition plate 260, thereby changing the structures of the first sound-deadening passage 110 and the second sound-deadening passage 120. For example, the separation plate 260 has a bent portion to change the thicknesses of the first sound-deadening passage 110 and the second sound-deadening passage 120, thereby improving the noise reduction effect.

Example seven:

on the basis of the sixth embodiment, as shown in fig. 2 and 5, the second silencing passage 120 is further defined to include a third passage section 121 and a fourth passage section 122. The number of the third-stage passages 121 is at least one, the number of the fourth-stage passages 122 is at least one, and the third-stage passages 121 and the fourth-stage passages 122 are alternately distributed in the height direction of the smoke collecting hood body 100. A third reference line is made along the height direction of the fume collecting hood body 100, and the cross-sectional area of any one fourth-stage passage 122 perpendicular to the third reference line is smaller than the cross-sectional area of the adjacent third-stage passage 121 perpendicular to the third reference line.

In this embodiment, the structure of the second sound-deadening passage 120 is specifically defined. Second sound-deadening passageway 120 includes at least one third-stage passageway 121 and at least one fourth-stage passageway 122. By making the cross-sectional area of any one of the fourth-stage passages 122 perpendicular to the third reference line smaller than the cross-sectional area of each of the third-stage passages 121 perpendicular to the third reference line, all of the fourth-stage passages 122 are thin relative to the third-stage passages 121. And is combined with the height direction of the smoke collecting cover body 100, so that the third section passage 121 and the fourth section passage 122 are alternately distributed, that is, the thickness of the second silencing passage 120 is changed continuously in the height direction. The thicker fourth-section channel 122 can achieve the silencing effect of the expansion cavity relative to the thinner third-section channel 121, so that sound waves can enter the thicker third-section channel 121 after entering the thinner fourth-section channel 122 in the process of propagating in the second silencing channel 120. On one hand, the sound wave is reflected by the changed cross section of the silencing channel, so that the sound wave is reflected to the sound source, the reflected sound wave is weakened to the sound wave which is not reflected, and the noise is reduced. On the other hand, after the sound waves with different frequencies enter the third-stage passage 121 with a larger cross section, especially after the sound waves enter a cavity expanded by the third-stage passage 121 relative to the fourth-stage passage 122, most of the sound waves are reflected and consumed in the expanded cavity, and only a small part of the sound waves with different frequencies can be transmitted into the next fourth-stage passage 122, so that the noise reduction effect is achieved.

It should be noted that each third-stage passage 121 and each fourth-stage passage 122 have a plurality of cross sections perpendicular to the third reference line, and the cross sectional areas of the fourth-stage passages 122 may be the same or different; the cross-sectional area of each third-stage channel 121 may be the same or different. The sectional area of the fourth passage 122 perpendicular to the third reference line is smaller than the sectional area of the third passage 121 perpendicular to the third reference line, which means that any of the sectional areas of the fourth passage 122 is smaller than any of the sectional areas of the third passage 121.

Further, the sectional areas of the third-stage passages 121 perpendicular to the third reference line are made the same, and/or the heights of the third-stage passages 121 are made the same, which facilitates the processing of the second silencing passage 120. The sectional areas of the third-stage channels 121 perpendicular to the third reference line are different, and/or the heights of the third-stage channels 121 are different, so that the sound waves with different frequencies can be silenced, and particularly, the sectional areas and the heights of the third-stage channels 121 perpendicular to the third reference line can be designed correspondingly for the sound waves with different frequencies generated by the fan 400, so that the noise reduction effect is improved. It should be noted that the height direction of the third-stage passage 121 is the same as the height direction of the smoke collecting hood body 100.

Further, the cross-sectional areas of the fourth passages 122 perpendicular to the third reference line are the same, and/or the heights of the fourth passages 122 are the same, so that the second silencing passage 120 can be conveniently machined, and the oil smoke can be conveniently and smoothly sucked into the range hood without being excessively disturbed. The sectional areas of the fourth-section passages 122 perpendicular to the third reference line are different, and/or the heights of the fourth-section passages 122 are different, so that the third-section passages 121 can expand cavities with different sizes relative to two adjacent fourth-section passages 122, and sound waves with different frequencies can be silenced. It should be noted that the height direction of the fourth-stage passage 122 is the same as the height direction of the smoke collecting hood body 100.

Example eight:

in addition to the seventh embodiment, it is further defined that the noise reduction assembly includes at least one second expansion chamber (not shown), and at least a portion of one second expansion chamber is configured as a portion of one third-stage passage 121. That is, at least a part of the wall surface of each second expansion chamber is configured as a part of the wall surface of one third-stage passage 121, and the expansion part of the second silencing passage 120 is realized by the second expansion chamber, so that the noise reduction effect is good.

Further, the number of the second expansion chambers is plural, and the plural second expansion chambers are distributed at intervals in the height direction of the hood body 100.

In a specific embodiment, the noise reduction assembly includes a plurality of second protrusions (not shown) spaced apart along the height of the fume collecting hood body 100. And the adjacent two second bulges and part of wall surfaces of the second channel between the adjacent two second bulges jointly enclose to form a second expansion chamber. The end of a second projection forms at least a portion of the wall of a fourth passage 122.

In this embodiment, the noise reduction assembly specifically includes a plurality of second protrusions, and the second expansion chamber is conveniently formed by distributing the plurality of second protrusions on the wall surface of the second channel at intervals, and making two adjacent second protrusions and the wall surface of the second channel between the two adjacent second protrusions jointly enclose the second expansion chamber. Moreover, it is convenient to design the height of the second protrusion to enable adjustment of the height of the fourth passage 122.

In a particular application, the number of second projections is 2 or 3 or 5.

In another specific embodiment, the noise reduction assembly includes a plurality of second shrouds (not shown). The plurality of second enclosing plates are distributed at intervals in the height direction of the fume collecting hood body 100. And the wall surfaces of any two adjacent second enclosing plates and the second channel positioned between the two second enclosing plates jointly enclose to form a second expansion chamber. And a second opening is formed between any two adjacent second enclosing plates, and the second opening is communicated with the second expansion chamber and the fourth section of passage 122. The second expansion chamber is convenient to machine and form. Furthermore, by having a second opening between two adjacent second enclosing plates, and communicating the second expansion chamber with the fourth passage 122 through the second opening, the size of the second opening can be designed to adjust the height of the third passage 121.

In a specific application, the plurality of second enclosing plates can be in a T shape, an L shape or a straight shape. The plurality of second enclosures may have different shapes.

Furthermore, the height of each first opening 213 is greater than or equal to one fourth of the height of the first expansion chamber 210 in which the first opening is located, so that sound waves can enter the first expansion chamber 210 conveniently, and the noise reduction effect is good. Moreover, the oil smoke will not be blocked greatly, which is beneficial to the oil smoke flowing fast in the first silencing channel 110.

Example nine:

in contrast to the eighth embodiment described above, the noise reduction assembly includes at least one second perforated plate 240 disposed within the second channel, as shown in fig. 16, 19 and 22. Each second perforated plate 240 is positioned across the second channel.

In this embodiment, the specifically defined noise reduction assembly includes at least one second perforated plate 240. By configuring at least one second perforated plate 240 as a part of the wall surface of second sound-deadening channel 120, noise reduction by the perforations in second perforated plate 240 is facilitated.

Further, the first passage and the second passage communicate. Is favorable for improving the smoking volume of the smoke collecting cavity, thereby being favorable for the smoke collecting hood to quickly suck a large amount of oil smoke.

Further, as shown in fig. 16 and 18, a first top plate 103 is connected to the top end of the first side plate 102.

In a particular embodiment, as shown in fig. 16, 18 and 22, a portion of the at least one second perforated plate 240 extends into the first channel at an angle relative to the first side plate 102.

In this embodiment, a part of the at least one second perforated plate 240 extends into the first channel and forms an included angle with the first side plate 102, so that a third sound-deadening chamber is arranged on a side of the at least one second perforated plate 240 away from the second sound-deadening channel 120, and different chamber depths are arranged at various positions on a side of the at least one second perforated plate 240 away from the second sound-deadening channel 120, which is beneficial to attenuating sound waves with different frequencies, and thus, a broadband noise reduction effect is achieved.

In another particular embodiment, as shown in fig. 18, 19 and 22, the noise reduction assembly further comprises a baffle 250, the baffle 250 being arranged on a side of the at least one second perforated plate 240 facing away from the second sound-deadening channel 120, the baffle 250 enclosing the at least one second perforated plate 240 to form the second sound-deadening chamber 242.

In this embodiment, by providing a baffle 250 on the side of the at least one second perforated plate 240 facing away from the second sound-deadening channel 120 to block the sound waves from continuing to propagate towards the back of the second perforated plate 240, the sound waves can be attenuated in the space between the baffle 250 and the second perforated plate 240, achieving noise reduction.

Additionally, where the noise reduction assembly further comprises at least one first perforated plate 220, the at least one first perforated plate 220 is connected to at least one second perforated plate 240.

Example ten:

in addition to any one of the sixth to ninth embodiments described above, as shown in fig. 7 and 10, the fume collecting hood is further defined to further include a first baffle 270 and/or a second baffle (not shown). The first flow guide member 270 is disposed in the first channel near the first air inlet 104; the second flow guide is disposed in the second channel near the second air inlet 105.

In this embodiment, the first flow guiding element 270 is disposed inside the first channel and near the first air inlet 104, so that the increase of noise caused by the formation of a vortex in the vicinity of the first air inlet 104 can be effectively avoided. The second flow guide part is arranged at the position, close to the second air inlet 105, in the second channel, so that the noise increase caused by the fact that the airflow forms a vortex near the second air inlet 105 can be effectively avoided.

Further, as shown in fig. 7 and 10, the first flow guide member 270 and the second flow guide member each have an arc-shaped flow guide surface.

Further, the first baffle 270 is located between the first air inlet 104 and the noise reduction assembly. By making the first guiding member 270 occupy the area near the first air inlet 104 where the vortex is easily formed, the noise reduction assembly occupies the remaining air flow dead zone and is connected to the first guiding member 270, and the noise reduction effect can be improved without affecting the oil smoke absorption effect.

Or further, as shown in fig. 7 and 10, a portion of the noise reduction assembly near the first intake vent 104 is configured as a first baffle 270.

Further, a second baffle is positioned between the second air inlet 105 and the noise reduction assembly. The second flow guide part occupies an area close to the second air inlet 105 and easy to form vortex, so that the noise reduction assembly occupies the rest airflow dead zone and is connected with the second flow guide part, and the noise reduction effect can be improved while the oil fume absorption effect is not influenced.

Or further, the portion of the noise reduction assembly near the second intake vent 105 is configured as a second baffle.

Example eleven:

the smoke collecting hood of some embodiments of the present invention will be described in detail with reference to fig. 1 to 22.

As shown in fig. 5, 10, 15, 16, 20, 21 and 22, the fume collecting hood includes a hood body 100, a noise reduction assembly, a first intake vent 104 and a second intake vent 105. The fume collecting hood body 100 includes a back plate 101, a first side plate 102, a first top plate 103, and a connecting plate 106. A first passage is formed between the back plate 101 and the first side plate 102, a part of the noise reduction assembly is disposed in the first passage, the noise reduction assembly and a wall surface of the first passage enclose to form a first silencing passage 110, and the first air inlet 104 is disposed on the first side plate 102 and is communicated with the first silencing passage 110. The first top plate 103 is connected with the top end of the first side plate 102 and located on the side of the first side plate 102 away from the back plate 101, the connecting plate 106 is connected with the end portion of the first top plate 103 far away from the first side plate 102, the connecting plate 106 and the first side plate 102 are distributed on two opposite sides of the first top plate 103, and a second channel is formed among the connecting plate 106, the first top plate 103 and the back plate 101. The other part of the noise reduction assembly is disposed in the second channel and encloses with the wall surface of the second channel to form a second silencing channel 120, and the second air inlet 105 is disposed on the first top plate 103 and is communicated with the second silencing channel 120.

First, a noise reduction structure of the first silencing passage 110 will be described.

In some embodiments, the noise reduction is performed by expanding the chamber, as shown in fig. 1-10. Specifically, first muffling channel 110 comprises a first section of channel 111 and a second section of channel 112. The number of the first stage channels 111 is at least one, and the number of the second stage channels 112 is at least one. The first-stage passages 111 and the second-stage passages 112 are alternately distributed in the height direction of the hood body 100. The first reference line is made along the height direction of the fume collecting hood body 100, so that the cross-sectional area of each second section passage 112 perpendicular to the first reference line is smaller than that of any first section passage 111 perpendicular to the first reference line. So that the first silencing passage 110 is varied in thickness in the height direction. The thicker second-section channel 112 can achieve the silencing effect of the expansion cavity relative to the thinner first-section channel 111, so that sound waves can enter the thicker first-section channel 111 and then enter the other thinner second-section channel 112 after entering the thinner second-section channel 112 in the process of propagating in the first silencing channel 110. On one hand, the sound wave is reflected by the changed cross section of the silencing channel, so that the sound wave is reflected to the sound source, the reflected sound wave is weakened to the sound wave which is not reflected, and the noise is reduced. On the other hand, after the sound waves with different frequencies enter the first section of channel 111 with a larger cross section, especially after the sound waves enter a cavity formed by expanding the first section of channel 111 relative to the second section of channel 112, most of the sound waves are reflected and consumed in the expanded cavity, and only a small part of the sound waves with different frequencies can be transmitted into the next section of second section of channel 112, so that the noise reduction effect is achieved.

Because a part of the noise reduction assembly is configured as a part of the wall surface of the first silencing passage 110, the noise reduction assembly can have various structures, so that the first silencing passage 110 has the structure, and the noise reduction function of the first silencing passage 110 is realized. For example, the noise reduction assembly may be formed with at least one first expansion chamber 210, with the expansion of the first sound attenuating passageway 110 being accomplished by the first expansion chamber 210, to accomplish expansion chamber noise reduction.

In a specific embodiment, as shown in fig. 2 to 5, the noise reduction assembly includes two first protrusions 211, the two first protrusions 211 are spaced apart from each other on the first side plate 102, and the two first protrusions 211 and the first side plate 102 enclose a first expansion chamber 210. That is, the ends of the two first protrusions 211 form a part of the wall surfaces of the two second-stage channels 112, and the wall surfaces of the first channels between the two first protrusions 211 and the wall surfaces of the two first protrusions 211 are configured as a part of the wall surfaces of the first-stage channels 111.

Further, as shown in fig. 2 and 5, the noise reduction assembly may further include a separation plate 260, and the separation plate 260 is disposed at a side of the at least two first protrusions 211 away from the first intake vent 104. An additional expansion chamber, herein referred to as a third expansion chamber, can be formed between the partition plate 260 and the first protrusion 211 of the at least two protrusions, which is far from the first intake vent 104, to increase the volume of the expanded portion of the first muffling passageway 110, thereby improving the noise reduction effect.

Wherein the partition plate 260 may have a bent portion to form a third expansion chamber.

In addition, the wall surface facing the connecting plate 106 due to the partition plate 260 belongs to a part of the wall surface of the second sound-deadening path 120. By designing the structure of the partition plate 260, for example, by making the partition plate 260 have a bending part, the second silencing passage 120 can be further divided into the third passage 121 and the fourth passage 122 with different thicknesses, so as to improve the noise reduction effect of the second silencing passage 120.

In another exemplary embodiment, as shown in fig. 6-10, the noise reduction assembly includes three first webs 212, the three first webs 212 being spaced apart from each other on the first side plate 102, and any adjacent two first webs 212 and the first side plate 102 enclosing a first expansion chamber 210. Between any adjacent first shroud 212 there is a first opening 213, the first opening 213 communicating the first expansion chamber 210 with the second section channel 112. The first shroud 212 may be T-shaped or L-shaped. The height of each first opening 213 in the height direction of the hood body 100 is greater than or equal to one-fourth of the height of the first extension chamber 210.

Further, the first enclosing plate 212, which is far from the first intake vent 104, of the three or more first enclosing plates 212 is configured as a partition plate 260 to partition the first sound deadening passage 110 and the second sound deadening passage 120.

In other embodiments, the noise reduction may also be performed by means of a perforated plate. Specifically, as shown in fig. 11 to 22, the noise reduction assembly includes a first perforated plate 220 disposed in the first passage, the first perforated plate 220 extending in the height direction of the hood body 100, the number of the first perforated plate 220 being at least one.

Further, a first sound deadening portion is provided between the at least one first perforated plate 220 and the first side plate 102.

Further, as shown in fig. 19, the noise reduction assembly further comprises a baffle 250, the baffle 250 is disposed on a side of the at least one first perforated plate 220 facing away from the first muffling channel 110, and the baffle 250 and the at least one first perforated plate 220 enclose to form a fourth muffling chamber. At this time, sound deadening material may be disposed in the fourth sound deadening chamber.

In a specific embodiment, as shown in fig. 18, 19 and 22, the number of the first perforated plate 220 is one, the first side plate 102 extends obliquely with respect to the height direction of the fume collecting hood body 100, and an included angle is formed between the first perforated plate 220 and the first side plate 102.

In another specific embodiment, as shown in fig. 12, 13 and 16, the number of the first perforated plates 220 is two, and the second reference line is taken along the height direction of the hood body 100, and the two first perforated plates 220 are spaced apart in the extending direction of the cross section of the first muffling passageway 110 perpendicular to the second reference line. The sound waves can be weakened through the two first perforated plates 220, and the noise reduction effect is good.

Second, a noise reduction structure of the second silencing passage 120 will be described.

Second sound-deadening passage 120 may be made to reduce noise by expanding the chamber or by using a perforated plate with reference to the noise reduction structure of first sound-deadening passage 110.

In some embodiments, the noise reduction is performed by expanding the cavity. As shown in fig. 2, 5, 7 and 10, in particular, second muffling channel 120 comprises a third-stage channel 121 and a fourth-stage channel 122. The number of the third-stage passages 121 is at least one, the number of the fourth-stage passages 122 is at least one, and the third-stage passages 121 and the fourth-stage passages 122 are alternately distributed in the height direction of the smoke collecting hood body 100. A third reference line is made along the height direction of the fume collecting hood body 100, and the cross-sectional area of any one fourth-stage passage 122 perpendicular to the third reference line is smaller than the cross-sectional area of the adjacent third-stage passage 121 perpendicular to the third reference line.

Wherein, because a part of the noise reduction assembly is configured as a part of the wall surface of the second silencing passage 120, the noise reduction assembly can have various structures, thereby satisfying that the second silencing passage 120 has the above structure and realizing the noise reduction function of the second silencing passage 120. For example, the noise reduction assembly may be formed with at least one second expansion chamber through which the expanded portion of the second sound attenuating passageway 120 is realized, and expanded cavity noise reduction is realized.

In a particular embodiment, the noise reduction assembly may include a plurality of second protrusions that are spaced apart along the height of the fume collecting hood body 100. And the adjacent two second bulges and part of wall surfaces of the second channel between the adjacent two second bulges jointly enclose to form a second expansion chamber. The end of a second projection forms at least a portion of the wall of a fourth passage 122.

In another particular embodiment, the noise reduction assembly may further include a plurality of second shrouds. The plurality of second enclosing plates are distributed at intervals in the height direction of the fume collecting hood body 100. And the wall surfaces of any two adjacent second enclosing plates and the second channel positioned between the two second enclosing plates jointly enclose to form a second expansion chamber. And a second opening is formed between any two adjacent second enclosing plates, and the second opening is communicated with the second expansion chamber and the fourth section of passage 122. The second expansion chamber is convenient to machine and form. Furthermore, by having a second opening between two adjacent second enclosing plates, and communicating the second expansion chamber with the fourth passage 122 through the second opening, the size of the second opening can be designed to adjust the height of the third passage 121.

In another specific embodiment, as shown in fig. 5, the dividing plate 260 may also be used to divide the first sound-deadening passageway 110 into a third-stage passageway 121 and a fourth-stage passageway 122, for example, the dividing plate 260 may have a bent portion without additionally providing a second protrusion or a second enclosing plate.

In other embodiments, as shown in fig. 13, 14 and 16, the noise reduction is performed by means of a perforated plate. The noise reduction assembly is made to include at least one second perforated plate 240 disposed within the second channel. Each second perforated plate 240 is positioned across the second channel.

Further, the first sound deadening portion is provided between the at least one second perforated plate 240 and the first top plate 103.

Further, as shown in fig. 13 and 19, in the case where the noise reduction assembly further includes at least one first perforated plate 220, the at least one first perforated plate 220 is connected with at least one second perforated plate 240. Such that the first perforated plate 220, the second perforated plate 240, the first top plate 103 and the first side plate 102 together enclose a fifth sound-damping chamber therebetween. The fifth sound-deadening chamber may be filled with a sound-deadening material.

In a specific embodiment, the number of the second perforated plates 240 is one, the first top plate 103 extends obliquely with respect to the height direction of the fume collecting hood body 100, and the second perforated plates 240 form an included angle with the first top plate 103.

Further, as shown in fig. 13, the noise reduction assembly further comprises a baffle 250, the baffle 250 is disposed on a side of the at least one second perforated plate 240 facing away from the second sound-deadening channel 120, and the baffle 250 and the at least one second perforated plate 240 enclose to form a second sound-deadening chamber 242. At this time, a sound deadening material may be disposed in the second sound deadening chamber 242.

In another specific embodiment, the number of the second perforated plates 240 is two, and the second perforated plates 240 are taken as a second reference line in the height direction of the hood body 100, and the two second perforated plates 240 are spaced apart in the extending direction of the cross section of the second muffling passageway 120 perpendicular to the second reference line. The sound waves can be weakened through the two second perforated plates 240, and the noise reduction effect is good.

Example twelve:

as shown in fig. 5, 10, 16 and 22, a range hood comprises a frame 300, a fan 400 and a smoke collecting hood as in any one of the above embodiments. The blower 400 is disposed in the accommodating chamber 310 of the rack 300; the smoke collecting cover is connected to one end of the frame 300, and the first passage communicates with the receiving chamber 310. Because the range hood has the smoke collecting hood of any one of the above embodiments, the range hood further has the beneficial effects of any one of the above embodiments, which are not described herein again.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A fume collecting hood, comprising:

the exhaust fume collecting hood comprises a fume collecting hood body, wherein a first channel is arranged in the fume collecting hood body;

at least part of the noise reduction assembly is arranged in the first channel and forms a first noise reduction channel with the wall surface of the first channel in a surrounding manner;

the first air inlet is formed in the smoke collecting cover body and communicated with the first silencing channel.

2. A fume collecting hood according to claim 1,

the first sound-deadening passage includes:

at least one first section channel;

at least one second-stage channel, wherein the first-stage channel and the second-stage channel are alternately distributed in the height direction of the smoke collecting hood body;

the first datum line is made along the height direction of the smoke collecting hood body, and the section area, perpendicular to the first datum line, of any one of the second section of channels is smaller than the section area, perpendicular to the first datum line, of the adjacent first section of channel.

3. A fume collecting hood according to claim 2,

the noise reduction assembly includes:

a plurality of first protrusions which are distributed on the wall surface of the first channel at intervals along the height direction of the fume collecting hood body;

the wall surface of the first channel between two adjacent first bulges is at least one part of the wall surface of one first section of channel, and the end part of each first bulge is at least one part of the wall surface of one second section of channel.

4. A fume collecting hood according to claim 2,

the noise reduction assembly includes:

the first enclosing plates are distributed on the wall surface of the first channel at intervals along the height direction of the fume collecting hood body;

and a first opening is formed between every two adjacent first enclosing plates, the wall surface of the first channel corresponding to the first opening in the horizontal direction is configured to be at least one part of the wall surface of the first section of channel, and each first enclosing plate is configured to be one part of the wall surface of one second section of channel.

5. A fume collecting hood according to claim 1,

the noise reduction assembly includes:

at least one first perforated plate is arranged in the first channel, and each first perforated plate extends in the height direction of the smoke collecting hood body.

6. A fume collecting hood according to claim 5,

one end of the at least one first perforated plate is arranged on the first wall surface of the first channel;

an included angle is formed between the at least one first perforated plate and the first wall surface of the first channel, and a first silencing cavity is formed in one side, deviating from the first silencing channel, of the at least one first perforated plate.

7. A fume collecting hood according to claim 6,

the noise reduction assembly further comprises:

and the silencing material is arranged in the first silencing cavity.

8. A fume collecting hood according to any one of claims 1 to 7,

the collection petticoat pipe body includes:

a back plate;

the first side plate is distributed opposite to the back plate, the first channel is formed between the first side plate and the back plate, the first air inlet is formed in the first side plate, and at least part of the noise reduction assembly is arranged in the first side plate;

the first top plate is arranged on one side, away from the back plate, of the first side plate;

and the second air inlet is formed in the first top plate.

9. A fume collecting hood according to claim 8,

the collection petticoat pipe body still includes:

the connecting plate is connected with the first top plate, the connecting plate and the first side plate are distributed on two opposite sides of the first top plate, and a second channel is formed between the connecting plate and the back plate;

a portion of the noise reduction assembly is disposed within the first channel;

the other part of the noise reduction assembly is arranged in the second channel and is enclosed with the wall surface of the second channel to form a second silencing channel, and the second air inlet is communicated with the second silencing channel.

10. A fume collecting hood according to claim 9,

the second sound-deadening passageway includes:

at least one third section channel;

at least one fourth section of channel, wherein the third section of channel and the fourth section of channel are alternately distributed in the height direction of the smoke collecting hood body;

and a third datum line is made along the height direction of the smoke collecting hood body, and the section area of any one fourth section of channel, which is perpendicular to the third datum line, is smaller than the section area of the adjacent third section of channel, which is perpendicular to the third datum line.

11. A fume collecting hood according to claim 9,

the noise reduction assembly includes:

at least one second perforated plate, each of said second perforated plates being positioned transversely within said second channel;

the first channel is communicated with the second channel;

a part of the at least one second perforated plate extends into the first channel and forms an included angle with the first side plate, or

The noise reduction assembly further comprises a baffle plate, the baffle plate is arranged on one side, deviating from the second silencing channel, of the at least one second perforated plate, and the baffle plate and the at least one second perforated plate are enclosed to form a second silencing cavity.

12. A range hood, comprising:

the rack is internally provided with an accommodating cavity;

the fan is arranged in the accommodating cavity; and

a fume collecting hood according to any one of claims 1 to 11 connected to the frame, the first passageway communicating with the housing chamber.

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