CN116006512A - Diversion noise reduction structure and range hood - Google Patents

Abstract

The invention relates to the technical field of household appliances, and discloses a diversion noise reduction structure and a range hood. The diversion noise reduction structure comprises a sound absorption noise reduction plate and a diversion plate, wherein the sound absorption noise reduction plate is provided with an avoidance gap and a plurality of sound absorption holes, and the avoidance gap is used for avoiding an air channel air inlet of a volute of the range hood; the guide plate is connected with the sound absorption and noise reduction plate and is arranged on the oil guide structure of the range hood, and the guide plate is used for guiding the air flow of the case air inlet of the fan case to the air channel air inlet. The invention does not influence the normal air inlet of the air duct air inlet, does not interfere in structural design, consumes the sound energy in a friction heat generation mode by the air flow at the two sides of the volute through the sound absorption holes, reduces the pneumatic noise, improves the space utilization rate in the fan case, reduces the air flow velocity from the case air inlet to the air duct air inlet, slows down the impact force of the air flow, improves the air flow uniformity of the air duct air inlet, and reduces the air flow turbulence degree of the air duct air inlet.

Description

Diversion noise reduction structure and range hood

Technical Field

The invention relates to the technical field of household appliances, in particular to a diversion noise reduction structure and a range hood.

Background

At present, most of the types of smoke machines adopting guide plates are concentrated on a double-cavity smoke machine and a side-suction smoke machine. The prior patent CN202122703503.3 aims at the double-cavity type smoke ventilator, a guide plate is designed in the air outlet end of the air duct, the guide plate is close to the volute tongue, the internal air duct is divided into two parts, the impact of air flow on the volute tongue is reduced, the actual installation problem is not considered in the scheme, and the guide plate is added in the air duct to easily cause the interference of the air duct structure. The prior patent CN202122327678.9 aims at that an automatically-adjusted guide plate is added below a smoke inlet of the side-draught type smoke machine so as to improve the smoking effect, but influences the pneumatic noise of the whole machine.

With the development of the type of the smoke machine, the air duct structure with large space is continuously updated. Because the air channel space of the large-space runner model is sufficient, the existing design of the guide plate cannot adapt to the structural characteristic requirement of the guide plate, and meanwhile, the wind noise characteristic generated by the internal flow field is considered, so that a novel guide structure and noise reduction measures are urgently needed to make up for the gap.

Disclosure of Invention

Based on the problems, the invention aims to provide a diversion noise reduction structure and a range hood, which can prevent interference in structural design and reduce pneumatic noise.

In order to achieve the above object, the following technical scheme is provided:

in a first aspect, the present invention provides a flow guiding noise reduction structure disposed in a fan case of a range hood, the flow guiding noise reduction structure including:

the sound absorption and noise reduction plate is provided with an avoidance notch and a plurality of sound absorption holes, and the avoidance notch is used for avoiding an air channel air inlet of a volute of the range hood;

the guide plate is connected with the sound absorption and noise reduction plate, is arranged on the oil guide structure of the range hood and is used for guiding the air flow of the case air inlet of the fan case to the air channel air inlet.

As an alternative scheme of the diversion noise reduction structure provided by the invention, a plurality of diversion blocks are arranged on the diversion plate at intervals, and an airflow temporary storage groove is formed between two adjacent diversion blocks.

As an alternative scheme of the diversion noise reduction structure provided by the invention, the diversion block is arc-shaped.

As an alternative scheme of the diversion noise reduction structure provided by the invention, the diversion plate is provided with the first diversion bulge and the second diversion bulge, and the first diversion bulge and the second diversion bulge are respectively positioned at two sides of the avoidance notch.

As an alternative scheme of the diversion noise reduction structure provided by the invention, the first diversion protrusion and the second diversion protrusion are curved towards the air inlet of the chassis.

As an alternative scheme of the diversion noise reduction structure provided by the invention, two ends of the diversion plate are respectively provided with a baffle, and the baffle is abutted against the inner wall of the fan case.

As an alternative scheme of the diversion noise reduction structure provided by the invention, the baffle is provided with the extension plate, and the extension plate is connected with the oil guide structure.

As an alternative scheme of the diversion noise reduction structure provided by the invention, a noise reduction layer is arranged on one side of the sound absorption noise reduction plate, which is away from the air inlet of the chassis.

As an alternative scheme of the diversion noise reduction structure provided by the invention, the noise reduction layer is noise reduction cotton.

As an alternative scheme of the diversion noise reduction structure provided by the invention, the sound absorption noise reduction plate is provided with a plurality of flanging bulges, the flanging bulges and the sound absorption noise reduction plate are surrounded to form a limit groove, and the noise reduction layer is arranged in the limit groove.

As an alternative scheme of the diversion noise reduction structure provided by the invention, a porous noise reduction plate is arranged on the inner wall of the fan case facing the air inlet of the air duct, and a resonance noise absorption cavity is formed between the noise absorption noise reduction plate and the porous noise reduction plate.

As an alternative to the flow-guiding noise reduction structure provided by the invention, the porosity of the sound-absorbing noise reduction plate is smaller than that of the porous noise reduction plate.

As an alternative scheme of the diversion noise reduction structure provided by the invention, the avoidance notch is attached to the air duct coaming of the volute.

In a second aspect, the invention also provides a range hood, which comprises the diversion noise reduction structure.

The beneficial effects of the invention are as follows:

according to the diversion noise reduction structure and the range hood, the diversion noise reduction structure is arranged in the fan case of the range hood, the air channel air inlet of the volute is avoided through the avoidance notch of the sound absorption noise reduction plate, the sound absorption noise reduction plate cannot influence the normal air inlet of the air channel air inlet, interference cannot be generated in structural design, the sound absorption noise reduction plate can also prevent air flow from escaping to two sides of the air channel air inlet, so that the air flow is concentrated to the air channel air inlet, the air flow at two sides of the volute is consumed in a friction heat generation mode through the sound absorption holes of the sound absorption noise reduction plate, the pneumatic noise is reduced, and because the guide plate is arranged on the oil guide structure of the range hood, the space utilization rate of the inside of the fan case is improved, the air flow of the case air inlet of the fan case is guided to the air channel air inlet through the guide plate, the air flow speed of the case air inlet is reduced, the impact force of the air flow is slowed down, the air flow uniformity of the air channel air inlet is improved, and the air flow turbulence degree of the air channel air inlet is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic front view of a diversion noise reduction structure provided in an embodiment of the present invention disposed in a fan case of a range hood;

fig. 2 is a schematic axial view of a flow guiding and noise reducing structure provided in an embodiment of the present invention disposed in a fan case of a range hood;

FIG. 3 is a schematic front view of a flow guiding noise reduction structure according to an embodiment of the present invention;

FIG. 4 is a first schematic axial view of a flow guiding noise reduction structure according to an embodiment of the present invention;

FIG. 5 is a second axial schematic view of a flow guiding noise reduction structure according to an embodiment of the present invention;

FIG. 6 is a schematic front view of a flow guiding noise reduction structure (when a first flow guiding protrusion and a second flow guiding protrusion are provided on a flow guiding plate) according to an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a diversion noise reduction structure provided in an embodiment of the present invention disposed in a fan case of a range hood;

fig. 8 is an exploded view of a range hood according to an embodiment of the present invention.

In the figure:

100. a diversion noise reduction structure; 110. a sound absorption and noise reduction plate; 111. avoiding the notch; 112. a sound absorption hole; 113. flanging and protruding; 120. a deflector; 121. a flow guiding block; 122. an air flow temporary storage groove; 123. a first deflector protrusion; 124. a second deflector protrusion; 130. a baffle; 140. an extension plate; 141. screw holes;

150. a resonant sound absorption cavity;

200. a fan case; 201. a porous noise reduction plate; 300. a volute; 301. an air inlet of the air duct; 302. an air duct coaming; 400. an oil guiding structure; 500. a smoke collecting cavity.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 8, the present embodiment provides a flow guiding noise reduction structure 100, and the flow guiding noise reduction structure 100 is disposed in a fan case 200 of a range hood. The diversion noise reduction structure 100 comprises a sound absorption noise reduction plate 110 and a diversion plate 120, wherein an avoidance gap 111 and a plurality of sound absorption holes 112 are formed in the sound absorption noise reduction plate 110, and the avoidance gap 111 is used for avoiding an air channel air inlet 301 of a volute 300 of the range hood. The baffle 120 is connected with the sound absorption and noise reduction plate 110, the baffle 120 is arranged on the oil guiding structure 400 of the range hood, and the baffle 120 is used for guiding the airflow of the air inlet of the fan case 200 to the air channel air inlet 301. The sound absorption holes 112 may be circular holes, the aperture of the sound absorption holes 112 may be 2mm, and the interval between two adjacent sound absorption holes 112 may be 8mm.

Because the diversion noise reduction structure 100 is arranged in the fan case 200 of the range hood, the wind channel air inlet 301 of the volute 300 is avoided through the avoidance notch 111 of the sound absorption noise reduction plate 110, the sound absorption noise reduction plate 110 can not influence the normal air inlet of the wind channel air inlet 301, interference can not be generated in structural design, the sound absorption noise reduction plate 110 can also prevent air flow from escaping to two sides of the wind channel air inlet 301, air flow is concentrated in the wind channel air inlet 301, the air flow on two sides of the volute 300 is consumed in a friction heat generation mode through the sound absorption holes 112 of the sound absorption noise reduction plate 110, pneumatic noise is reduced, and because the diversion plate 120 is arranged on the oil guide structure 400 of the range hood, the space utilization rate of the interior of the fan case 200 is improved, the air flow of the case air inlet of the fan case 200 is guided to the wind channel air inlet 301 through the diversion plate 120, the air flow rate from the case air inlet to the wind channel air inlet 301 is reduced, the impact force of the air flow is slowed down, the air flow uniformity of the wind channel air inlet 301 is improved, and the air flow turbulence degree of the wind channel 301 is reduced.

In order to avoid affecting the airflow of the air duct air inlet 301, the baffle 120 may be located below the sound absorption and noise reduction plate 110, and the baffle 120 and the sound absorption and noise reduction plate 110 may be integrally formed, so as to facilitate installation. The overall outline of the baffle 120 is matched with the oil guiding structure 400, and can be arranged at the top of the oil guiding structure 400, so that the space above the oil guiding structure 400 in the fan case 200 is fully utilized. The outer contour edge of the baffle 120 may be 858mm in length and 90mm in height. The thickness of the sound absorbing and reducing board 110 is determined according to practical requirements, and is generally 0.8mm-5mm, and the sound absorbing and reducing board 110 can be made of resin material or cut metal plate.

Optionally, a plurality of guide blocks 121 are disposed on the guide plate 120 at intervals, and an airflow temporary storage groove 122 is formed between two adjacent guide blocks 121. The plurality of guide blocks 121 may be arranged at equal intervals along the horizontal direction, so as to avoid affecting the airflow of the chassis air inlet to flow towards the air duct air inlet 301. The airflow can be temporarily limited in the airflow temporary storage groove 122, and the flow guiding block 121 can block part of the airflow from diffusing to two sides of the volute 300, so that more airflow enters the air duct air inlet 301 under the negative pressure of the air duct air inlet 301, and the airflow rate of the air duct air inlet 301 is increased. The height of the guide blocks 121 may be 90mm, the thickness may be 10mm, and the interval between two adjacent guide blocks 121 may be 20mm.

Optionally, the guide block 121 is arc-shaped. The arc design can reduce the resistance of airflow, better transition to the air duct air inlet 301, improve the uniformity of the flow field at the air duct air inlet 301, reduce the airflow disorder and reduce the pneumatic noise. The guide blocks 121 may be vertically disposed, and the height of the upper and lower sides of the guide blocks 121 is smaller than the middle height. In some embodiments, the deflector block 121 may also be a beveled wedge block.

Optionally, the baffle 120 is provided with a first guiding protrusion 123 and a second guiding protrusion 124, and the first guiding protrusion 123 and the second guiding protrusion 124 are respectively located at two sides of the avoidance gap 111. The air flows at the two sides of the air inlet of the case are concentrated towards the center of the air channel through the first guide bulge 123 and the second guide bulge 124. To enhance the flow guiding effect, the first flow guiding protrusion 123 and the second flow guiding protrusion 124 are curved towards the air inlet of the chassis.

In order to reduce the escape of the airflow from the air inlet of the fan case to the two sides of the scroll case 300 as much as possible, optionally, two ends of the baffle 120 are respectively provided with a baffle 130, and the baffle 130 is abutted against the inner wall of the fan case 200. The baffle 130 may be rectangular, the length of the baffle 130 may be 140mm, the height may be 90mm, and the width may be 5mm. The baffle 130 and the sound absorbing and reducing board 110 may be integrally formed, so that the whole diversion and noise reduction structure 100 is convenient to install and fix.

To facilitate fixing the baffle 130, optionally, an extension plate 140 is provided on the baffle 130, and the extension plate 140 is connected to the oil guiding structure 400. The extension plate 140 may be provided with a plurality of screw holes 141, and screws are inserted into the screw holes 141, so that the extension plate 140 is fixedly connected with the oil guiding structure 400 through the screws. The plurality of screw holes 141 can be arranged at equal intervals, so that the stress of the extension plate 140 is uniform, the sizes of the plurality of screw holes 141 can be the same, screws with the same specification are convenient to use, and the aperture of the screw holes 141 can be 3.2mm.

In order to improve the noise reduction effect of the sound absorption and noise reduction plate 110, optionally, a noise reduction layer is disposed on a side of the sound absorption and noise reduction plate 110 facing away from the air inlet of the chassis. Optionally, the noise reduction layer is noise reduction cotton. The noise reduction cotton is also the soundproof cotton, the main material of the noise reduction cotton is porous fiber, and the noise reduction principle of the noise reduction cotton is as follows: the sound wave is transmitted in the air, the noise reduction cotton is of a multi-fiber structure, the sound wave passes through reflection of countless fibers when passing through the noise reduction cotton, the sound wave energy is converted into heat energy, the sound wave intensity is weakened, and the sound disappears.

Optionally, the sound absorption and noise reduction plate 110 is provided with a plurality of flanging protrusions 113, the flanging protrusions 113 and the sound absorption and noise reduction plate 110 enclose to form a limit groove, and the noise reduction layer is arranged in the limit groove. The noise reduction cotton is just limited in the limiting groove, and the noise reduction cotton is fixed without an additional installation mode.

Optionally, a porous noise reduction plate 201 is disposed on an inner wall of the fan case 200 facing the air duct air inlet 301, and a resonance noise absorption cavity 150 is formed between the noise absorption noise reduction plate 110 and the porous noise reduction plate 201. The energy of the air flow noise passing through the perforated noise reduction plate 201 is weakened, and the sound is further absorbed after reaching the sound absorption noise reduction plate 110. The perforated noise reduction plate 201 has a perforated aperture of 2.2mm and a pitch of 10mm.

Alternatively, the porosity of the sound absorbing and reducing panel 110 is smaller than that of the porous noise reducing panel 201. The porosity of the sound absorption and noise reduction plate 110 is small, the effect of absorbing low-frequency noise is obvious, the porosity of the porous noise reduction plate 201 is large, the effect of absorbing medium-high-frequency noise is obvious, the noise peak can be effectively absorbed, and the working risk frequency of the range hood can be avoided.

Optionally, the avoidance gap 111 is attached to the air duct shroud 302 of the volute 300. That is, the sound-absorbing and noise-reducing board 110 is hollowed out by the outer contour of the air duct of the volute 300 to obtain the avoidance notch 111, the sound-absorbing and noise-reducing board 110 does not influence the normal air intake of the air duct air inlet 301, interference is not generated in structural design, and the sound-absorbing and noise-reducing board 110 can also block air flow from escaping to two sides of the air duct air inlet 301, so that the air flow is concentrated in the air duct air inlet 301. The avoidance gap 111 is only required to be abutted against the air duct coaming 302, and the avoidance gap 111 and the air duct coaming 302 are not required to be fixedly connected.

The embodiment also provides a range hood, including the above-mentioned water conservancy diversion noise reduction structure 100, the air current of collection cigarette chamber 500 gets into fan case 200 through the quick-witted case air intake, the air current gets into wind channel air intake 301 under the negative pressure effect, because water conservancy diversion noise reduction structure 100 sets up in the fan case 200 of range hood, dodge the wind channel air intake 301 of spiral case 300 through the dodging breach 111 of sound absorption noise reduction plate 110, the sound absorption noise reduction plate 110 can not influence the normal air inlet of wind channel air intake 301, also can not produce the interference in structural design, sound absorption noise reduction plate 110 can also block the air current and escape to the both sides of wind channel air intake 301, make the air current concentrate in wind channel air intake 301, through the sound absorption hole 112 of sound absorption noise reduction plate 110 with the air current of spiral case 300 both sides consume the acoustic energy in the way of friction heat, pneumatic noise has been reduced, because the air current of baffle 120 setting up on the oil guide structure 400 of range hood, the space utilization in fan case 200 has been improved, the air current of wind channel air intake 301 is led to wind channel air intake 301 through baffle 120, the air current speed of wind channel air intake 301 has been reduced, the impact strength of air current of wind channel air current has been slowed down, the uniformity of air current has improved, and wind channel air current wind channel air intake 301 has been reduced.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (14)

1. The utility model provides a structure of making an uproar falls in water conservancy diversion, its characterized in that sets up in range hood's fan machine case (200), the structure of making an uproar falls in water conservancy diversion includes:

the sound absorption and noise reduction plate (110), wherein the sound absorption and noise reduction plate (110) is provided with an avoidance gap (111) and a plurality of sound absorption holes (112), and the avoidance gap (111) is used for avoiding an air duct air inlet (301) of a volute (300) of the range hood;

the guide plate (120) is connected with the sound absorption and noise reduction plate (110), the guide plate (120) is arranged on an oil guide structure (400) of the range hood, and the guide plate (120) is used for guiding air flow of a cabinet air inlet of the fan cabinet (200) to the air duct air inlet (301).

2. The diversion and noise reduction structure according to claim 1, wherein a plurality of diversion blocks (121) are arranged on the diversion plate (120) at intervals, and an airflow temporary storage groove (122) is formed between two adjacent diversion blocks (121).

3. The flow guiding and noise reducing structure according to claim 2, wherein the flow guiding block (121) is arc-shaped.

4. The flow guiding and noise reducing structure according to claim 1, wherein a first flow guiding protrusion (123) and a second flow guiding protrusion (124) are arranged on the flow guiding plate (120), and the first flow guiding protrusion (123) and the second flow guiding protrusion (124) are respectively located at two sides of the avoidance gap (111).

5. The flow-guiding and noise-reducing structure according to claim 4, wherein the first flow-guiding protrusion (123) and the second flow-guiding protrusion (124) are curved toward the chassis air inlet.

6. The diversion and noise reduction structure according to claim 1, wherein two ends of the diversion plate (120) are respectively provided with a baffle plate (130), and the baffle plates (130) are abutted against the inner wall of the fan case (200).

7. The flow guiding and noise reducing structure according to claim 6, wherein an extension plate (140) is provided on the baffle plate (130), and the extension plate (140) is connected with the oil guiding structure (400).

8. The diversion and noise reduction structure according to claim 1, wherein a noise reduction layer is arranged on a side of the sound absorption and noise reduction plate (110) facing away from the air inlet of the chassis.

9. The flow-directing noise reduction structure of claim 8, wherein the noise reduction layer is noise reduction cotton.

10. The diversion and noise reduction structure according to claim 8, wherein the sound absorption and noise reduction plate (110) is provided with a plurality of flanging protrusions (113), the flanging protrusions (113) and the sound absorption and noise reduction plate (110) are surrounded to form a limit groove, and the noise reduction layer is arranged in the limit groove.

11. The diversion and noise reduction structure according to claim 1, wherein a porous noise reduction plate (201) is arranged on an inner wall of the fan case (200) facing the air duct air inlet (301), and a resonance noise absorption cavity (150) is formed between the noise absorption and reduction plate (110) and the porous noise reduction plate (201).

12. The flow directing noise reducing structure of claim 11, wherein the sound absorbing noise reducing panel (110) has a porosity less than a porosity of the porous noise reducing panel (201).

13. The flow guiding and noise reducing structure according to any of claims 1-12, wherein the avoidance gap (111) is attached to an air duct shroud (302) of the volute (300).

14. A range hood comprising a flow directing and noise reducing structure as defined in any one of claims 1 to 13.

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